1. The utility model provides a combined type coal gas dry purification device, includes the barrel, the lower part of barrel is provided with the coal gas import, and the upper portion of barrel is provided with coal gas export, its characterized in that: a plurality of filter cylinders are arranged in the cylinder body below the coal gas outlet, each filter cylinder is of an inverted cone structure which is tapered from top to bottom, each filter cylinder comprises an adsorption layer and a dust removal filter layer, the adsorption layers are arranged inside and outside the filter cylinders, and the adsorption layers are located on the inner sides of the dust removal filter layers; the gas filter is characterized in that a gas collecting chamber is arranged at the upper part of the cylinder body, a gas inlet is formed in the outer peripheral side of the filter cylinder, a gas outlet in the upper end of the filter cylinder is communicated with the gas collecting chamber, and the gas collecting chamber is connected with a gas outlet.

2. The composite gas dry purification device according to claim 1, wherein: the gas inlet is arranged on the side face of the lower portion of the cylinder, the gas inlet direction is along the radial direction of the cylinder, at least two zones are arranged on the cross section of the cylinder from near to far along the gas inlet direction of the gas, a plurality of filter cylinders are transversely arranged in each zone side by side, and the number, the length or the diameter of the filter cylinders among the zones are different.

3. The composite gas dry purification device according to claim 2, wherein: along the gas inlet direction of the gas, the length of the filter cartridge increases gradually from the section nearest to the gas inlet to the section farthest from the gas inlet, and/or the diameter of the filter cartridge increases gradually from section to section.

4. The composite gas dry purification device according to claim 3, wherein: the upper ends of the partitioned filter cylinders are parallel and level, and the height of the lower ends of the filter cylinders is gradually reduced along the gas inlet direction.

5. The composite gas dry purification device according to claim 2, wherein: on the cross section of the cylinder body, the centers of the filter cylinders of the partitions are distributed on the same circular arc with the center of the gas inlet as the center of a circle.

6. The composite gas dry purification device according to claim 2, wherein: on the cross section of the cylinder body, the cylinder body is divided into three areas along the gas inlet direction, and the radial distance ratio of the farthest boundary of each subarea to the center of the gas inlet is 1:2-2.5: 4-4.5.

7. The composite gas dry purification device according to claim 1, wherein: the filter cartridge comprises an outer sleeve and an inner sleeve which are provided with air permeable pores, the inner sleeve and the outer sleeve are of inverted cone structures with thick tops and thin bottoms, the outer sleeve is a dedusting filter material, a containing cavity for containing an adsorbent is formed between the outer sleeve and the inner sleeve, and the containing cavity is filled with the adsorbent.

8. The composite gas dry purification device according to claim 7, wherein: the outer sleeve is a metal filter material, a ceramic filter material or a fiber filter material; the inner sleeve is a Johnson net, or the inner sleeve is composed of a porous net pipe and a silk net.

9. The composite gas dry purification device according to claim 7, wherein: the outer cover is a cloth bag, and the outer cover is supported by keels or porous sleeves.

10. The composite gas dry purification device according to claim 7, wherein: the opening rate of the inner sleeve is more than or equal to 30 percent.

11. The composite gas dry purification device according to claim 7, characterized in that: the gas collection device is characterized in that a support plate is arranged in the cylinder, the gas collection chamber is enclosed between the support plate and the top of the cylinder, the support plate separates gas before and after purification, the upper end of the filter cylinder is arranged on the support plate, and the support plate is provided with an opening corresponding to the upper end of the inner sleeve of the filter cylinder.

12. The composite gas dry purification device according to claim 11, characterized in that: the lower extreme of endotheca is sealed through first closing plate, the upper and lower extreme of straining a section of thick bamboo all is provided with the apron that is used for sealed chamber that holds.

13. The composite gas dry purification device according to claim 11, wherein: the filter cartridge further comprises an inner supporting tube used for mounting the inner sleeve and an outer supporting tube used for mounting the outer sleeve, the inner supporting tube is connected with the outer supporting tube through an intermediate connecting piece, the inner sleeve is connected to the lower end of the inner supporting tube, the outer sleeve is connected to the lower end of the outer supporting tube, a connecting portion is arranged on the inner supporting tube or the outer supporting tube, and the connecting portion is welded with the supporting plate or connected with the supporting plate through bolts.

14. The composite gas dry purification device according to claim 13, wherein: the upper end of the accommodating cavity is sealed through a cover plate, or an adsorbent is filled between the inner supporting tube and the outer supporting tube, the filling height of the adsorbent between the inner supporting tube and the outer supporting tube is larger than the thickness of the adsorption layer, and the upper end of the accommodating cavity is sealed through the adsorbent; the lower end of the inner sleeve is sealed through a first sealing plate, the lower end of the filter cartridge is provided with a second sealing plate which can be opened and closed, and the lower end of the accommodating cavity is sealed through the second sealing plate.

15. The composite gas dry purification device according to claim 7, wherein: the adsorbent is a granular degreasing agent, a deoxidizer, a hydrolytic agent, a dechlorination adsorbent, a desulfurization adsorbent or a catalyst.

16. The composite gas dry purification device according to claim 7, wherein: the adsorption layer of each filter cartridge is one to multiple layers, and when the filter cartridge is at least two layers, the adsorbents in each layer are the same or different in type.

17. The composite gas dry purification device according to claim 1, wherein: the inner wall of the cylinder body is provided with a limiting structure, the lower end of the filter cylinder is provided with a limiting part, one of the limiting structure and the limiting part is provided with a limiting groove, the other one of the limiting structure and the limiting part is vertically provided with a limiting pin, and the limiting pin extends into the limiting groove to limit the swing range of the filter cylinder in a transverse plane.

18. The composite gas dry purification device according to claim 1, wherein: the combined type coal gas dry purification device further comprises a blowing ash removal device, the blowing ash removal device comprises an air supply device, a blowing main pipe and a blowing branch pipe, the blowing branch pipe is of an inverted cone-shaped structure with a thick upper part and a thin lower part, a plurality of blowing openings are formed in the side face of the blowing branch pipe, and the blowing branch pipe extends into the filter cylinder.

19. The composite gas dry purification device according to claim 18, wherein: the blowing opening is trumpet-shaped.

Background

Blast furnace gas is an acidic corrosive gas containing dust and gaseous impurities, such as oil, chlorine, sulfur and other impurities; the dust is removed by a dust removal system, and the dust is conveyed to a user after impurities are removed. In the prior art, the dry dust removal is usually carried out by blast furnace gas, and then the impurity systems such as chlorine and sulfur are removed by a dechlorinating device and a hydrolysis desulfurizing device which are independently arranged at the downstream, so that the total occupied area is large, and the large-area popularization is not facilitated. A single-function filter cylinder is usually installed in the conventional dry dust removal device, only a pure dust removal effect is achieved, and the function of removing impurities such as oil, chlorine, sulfur and the like is not achieved.

Disclosure of Invention

In view of the above disadvantages of the prior art, the present invention provides a composite gas dry purification device, which can remove dust and impurities simultaneously, and improve the work efficiency of the purification system.

In order to achieve the above and other related objects, the present invention provides a composite gas dry purification device, comprising a cylinder, wherein the lower part of the cylinder is provided with a gas inlet, the upper part of the cylinder is provided with a gas outlet, a plurality of filter cartridges are arranged in the cylinder below the gas outlet, the filter cartridges are in an inverted cone structure which is tapered from top to bottom, and comprise an adsorption layer and a dust removal filter layer which are arranged inside and outside, and the adsorption layer is arranged on the inner side of the dust removal filter layer; the gas filter is characterized in that a gas collecting chamber is arranged at the upper part of the cylinder body, a gas inlet is formed in the outer peripheral side of the filter cylinder, a gas outlet in the upper end of the filter cylinder is communicated with the gas collecting chamber, and the gas collecting chamber is connected with a gas outlet.

Optionally, the gas inlet is arranged on the side face of the lower portion of the cylinder, the gas inlet direction is along the radial direction of the cylinder, at least two zones are arranged on the cross section of the cylinder from near to far along the gas inlet direction of the gas, a plurality of filter cartridges are transversely arranged in each zone side by side, and the number, the length or the diameter of the filter cartridges in each zone are different.

Optionally, the length of the filter cartridge increases zone by zone and/or the diameter of the filter cartridge increases zone by zone from the zone closest to the gas inlet to the zone farthest from the gas inlet in the gas inlet direction.

Optionally, the upper end of each partitioned filter cylinder is flush, and the height of the lower end of each partitioned filter cylinder decreases from one partition to the next along the gas inlet direction.

Optionally, on the cross section of the cylinder body, the centers of the filter cartridges of the partitions are distributed on the same circular arc with the center of the gas inlet as the center.

Optionally, the cross section of the cylinder body is divided into three zones along the gas inlet direction, and the radial distance ratio of the farthest boundary of each zone to the center of the gas inlet is 1:2-2.5: 4-4.5.

Optionally, the filter cartridge comprises an outer sleeve and an inner sleeve with air permeable pores, the inner sleeve and the outer sleeve are both of inverted cone structures with thick tops and thin bottoms, the outer sleeve is a dedusting filter material, a containing cavity for containing an adsorbent is formed between the outer sleeve and the inner sleeve, and the containing cavity is filled with the adsorbent.

Optionally, the outer sleeve is a metal filter material, a ceramic filter material or a fiber filter material; the inner sleeve is a Johnson net, or the inner sleeve is composed of a porous net pipe and a silk net.

Optionally, the outer cover is a cloth bag, and the outer cover is supported by a keel or a porous sleeve.

Optionally, the inner sleeve has an aperture ratio of 30% or more.

Optionally, a support plate is arranged in the cylinder, the gas collecting chamber is enclosed between the support plate and the top of the cylinder, the support plate separates gas before and after purification, the upper end of the filter cylinder is mounted on the support plate, and the support plate is provided with an opening corresponding to the upper end of the inner sleeve of the filter cylinder.

Optionally, the lower end of the inner sleeve is sealed by a first sealing plate, and the upper end and the lower end of the filter cartridge are both provided with a cover plate for sealing the accommodating cavity.

Optionally, the filter cartridge further comprises an inner support tube for mounting the inner sleeve and an outer support tube for mounting the outer sleeve, the inner support tube is connected with the outer support tube through an intermediate connecting piece, the inner sleeve is connected to the lower end of the inner support tube, the outer sleeve is connected to the lower end of the outer support tube, a connecting portion is arranged on the inner support tube or the outer support tube, and the connecting portion is welded or bolted to the support plate.

Optionally, the upper end of the accommodating cavity is sealed by a cover plate, or an adsorbent is filled between the inner support tube and the outer support tube, the filling height of the adsorbent between the inner support tube and the outer support tube is greater than the thickness of the adsorption layer, and the upper end of the accommodating cavity is sealed by the adsorbent; the lower end of the inner sleeve is sealed through a first sealing plate, the lower end of the filter cartridge is provided with a second sealing plate which can be opened and closed, and the lower end of the accommodating cavity is sealed through the second sealing plate.

Optionally, the adsorbent is a granular degreasing agent, a deoxidizer, a hydrolyzing agent, a dechlorinating adsorbent, a desulfurizing adsorbent or a catalyst.

Optionally, the adsorbent layer of each of the cartridges is one layer to a plurality of layers, and when at least two layers, the adsorbent species of each layer may be the same or different.

Optionally, a limiting structure is arranged on the inner wall of the cylinder, a limiting part is arranged at the lower end of the filter cylinder, a limiting groove is formed in one of the limiting structure and the limiting part, a limiting pin is vertically arranged in the other limiting structure, and the limiting pin extends into the limiting groove to limit the swing range of the filter cylinder in the transverse plane.

Optionally, the combined type gas dry purification device further comprises an injection ash removal device, the injection ash removal device comprises a gas supply device, an injection main pipe and an injection branch pipe, the injection branch pipe is of an inverted cone structure with a thick upper part and a thin lower part, a plurality of injection ports are formed in the side surface of the injection branch pipe, and the injection branch pipe extends into the filter cylinder.

Optionally, the blowing opening is trumpet-shaped.

As described above, the present invention has the following advantageous effects: by adopting the structure, the outer layer of the filter cylinder is a filter layer for dust removal, the adsorption layer positioned on the inner side of the filter layer is used for adsorbing and removing impurities such as oil, chlorine, sulfur and the like, the functions of dust removal and impurity removal can be realized through the filter cylinder, and a desulfurization device and a dechlorination device are not required to be additionally arranged, so that the floor area of gas treatment equipment can be reduced, the investment cost is reduced, and the gas treatment efficiency is improved; in addition, the filter cartridge is of a conical structure with a large upper part and a small lower part, so that the filtering efficiency can be improved.

In addition, the cross section of the cylinder body is provided with at least two subareas from near to far along the gas inlet direction of the gas, a plurality of filter cylinders are transversely arranged in each subarea side by side, the number, the length or the diameter of the filter cylinders among the subareas are different, the gas treatment capacity of each subarea is increased gradually, the problems of uneven distribution of the gas flow and low dust removal efficiency in the dust remover (particularly in a vertical gas inlet mode) can be solved, a flow equalizing device is not required to be additionally arranged, and the filter cylinders are matched with the gas flow distribution. The uniformity and effectiveness of dust removal and filtration are improved.

Drawings

FIG. 1 is a schematic diagram of an embodiment;

FIG. 2 is a schematic diagram of the construction of a filter cartridge in one embodiment;

FIG. 3 is a schematic view of the upper end of the filter cartridge in one embodiment;

FIG. 4 is a schematic view of the lower end of the filter cartridge in one embodiment;

FIG. 5 is a schematic view (from above) of FIG. 3 showing the connection of the inner support tube to the outer support tube;

FIG. 6 is a view A-A of FIG. 1;

FIG. 7 is a schematic view of a section of a barrel;

FIG. 8 is a schematic structural diagram of another embodiment;

FIG. 9 is an enlarged view of a portion of FIG. 8;

fig. 10 is a schematic structural diagram of yet another embodiment.

Part number description:

1-a filter cartridge; 11-a jacket; 12-an adsorbent; 13-inner sleeve; 14-a cover plate; 15-a second sealing plate; 16-a first sealing plate; 17-a flange plate; 21-inner support tube; 22-an outer support tube; 23-a scaffold; 24-a connecting portion; 25-wire mesh; 3-a cylinder body; 3 a-a first partition; 3 b-a second partition; 3 c-a third partition; 31-gas inlet; 32-gas outlet; 33-gas collection chamber; 34-an ash collecting hopper; 4-a support plate; 5-blowing ash removal device; 51-a header pipe; 52-branch pipe; 53-a blowing port; 61-a limit structure; 62-a limit pin; 63-limiting groove.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Example 1

As shown in fig. 1 to 5, a composite gas dry purification device for removing dust and impurities such as chlorine and sulfur from gas comprises a cylinder 3, wherein a gas inlet 31 is formed in the lower part of the cylinder 3, the gas inlet 31 is connected with an inlet pipeline, a gas outlet 32 is formed in the upper part of the cylinder 3, the gas outlet 32 is connected with an outlet pipeline, a plurality of filter cartridges 1 are transversely arranged in the cylinder 3 side by side, the filter cartridges 1 are positioned below the gas outlet 32, and the upper side of the gas inlet 31; the filter cartridge 1 is of an inverted cone structure which is tapered from top to bottom, and the filter cartridge 1 comprises an adsorption layer and a dust removal filter layer which are arranged radially inwards and outwards, wherein the adsorption layer is positioned on the inner side of the dust removal filter layer, the dust removal filter layer is used for filtering dust, and the adsorption layer is filled with an adsorbent for removing other impurities such as chlorine, sulfur and the like; a gas collecting chamber 33 is arranged at the upper part of the cylinder 3, and the gas collecting chamber 33 is positioned above the filter cartridge 1 and is communicated with the gas outlet 32; the gas inlet when gas purification is performed is arranged on the outer peripheral side of the filter cartridge 1, and the upper end of the filter cartridge 1 is provided with a gas outlet after gas purification, and the gas outlet is communicated with the gas collecting chamber 33. When the coal gas purifier is used, unpurified coal gas is fed from the coal gas inlet 31, flows upwards in the cylinder 3, is sequentially treated by the dust removal filtering layer and the adsorption layer of the filter cartridge 1 to obtain purified coal gas, enters the coal gas collecting chamber 33 and is discharged through the coal gas outlet 32 for a user to use, and the bottom of the cylinder 3 is provided with the ash collecting hopper 34, the ash discharging port and the like for cleaning collected dust.

The outer layer of the filter cylinder 1 is a filter layer for dust removal, the adsorption layer positioned on the inner side of the filter layer is used for adsorbing and removing impurities such as oil, chlorine, sulfur and the like, the functions of dust removal and impurity removal can be realized through the filter cylinder 1, a desulfurization device and a dechlorination device are not required to be additionally arranged, the floor area of gas treatment equipment can be reduced, the investment cost is reduced, and the gas treatment efficiency is improved; in addition, because the filter cartridge 1 is in a conical structure with a large upper part and a small lower part, the contact area of the coal gas and the side wall of the filter cartridge 1 can be increased during coal gas treatment, the passing area of the coal gas is increased, and the dust removal efficiency is improved. The filter cartridge 1 with the inverted cone-shaped structure can reduce the adhesion of dust on the outer wall of the filter cartridge 1 and facilitate the subsequent ash removal treatment.

Specifically, the filter cartridge 1 comprises an outer sleeve 11 and an inner sleeve 13 which are coaxially sleeved, the inner sleeve 13 and the outer sleeve 11 both have air-permeable pores so that gas can pass through, the inner sleeve 13 and the outer sleeve 11 are both in inverted cone structures with thick upper parts and thin lower parts, the outer sleeve 11 is a dedusting filter material, an annular accommodating cavity for accommodating the adsorbent 12 is formed between the outer sleeve 11 and the inner sleeve 13, and the accommodating cavity is filled with the adsorbent 12. The adsorbent 12 is a granular degreasing agent, a deoxidizer, a hydrolytic agent, a dechlorination adsorbent, a desulfurization adsorbent or a catalyst, and different types of the adsorbent 12 can be set according to different requirements.

In one embodiment, the outer cover 11 is a metal filter material, a ceramic filter material or a fiber filter material, and the outer cover 11 constitutes a dust removal filter layer.

Fibrous filter materials such as woven cloth and needle felt, woven fibrous (textile fiber) filter materials: 729-I terylene and 208 terylene flannelette; nonwoven fiber (nonwoven fiber) filter material: polyester needle felt (polyester long fiber base cloth), P-84 needle felt (P-84 base cloth), glass fiber needle felt (glass fiber base cloth), PPS needle felt (PPS long fiber base cloth), PPS needle felt (glass fiber base cloth), Metas-500 (Metas base cloth), and the like.

The metal filter material can be formed by pressing and sintering metal powder by using a bonding agent and a pore-forming agent, and can also be formed by sintering metal fibers after non-woven laying. The ceramic filter material can be composed of aluminum silicate fiber and inorganic adhesive. Of course, other dedusting filter materials in the prior art can also be adopted as the dedusting filter layer.

In another embodiment, the outer cover 11 is a cloth bag (fiber filter material), the sleeve with an opening on the inner side of the outer cover 11 is provided with a keel, the outer cover 11 is supported on the keel frame or outside the sleeve, the keel or the sleeve is used for supporting the filter material to prevent the filter material from shaking or deforming, the opening of the sleeve is smaller than the particle size of the adsorbent 12, and the ventilation effect is ensured. Of course, the framework can also be embedded in the filter material for supporting.

In this example, the sizes of the air-permeable pores of the outer sleeve 11 and the inner sleeve 13 are both smaller than the particle size of the adsorbent 12, and the adsorbent 12 is prevented from leaking.

In some embodiments, the inner sleeve 13 is a metal structure, a Johnson mesh can be used, or the inner sleeve 13 is made of a porous mesh tube and a wire mesh. Wherein, in order to ensure the ventilation effect, the aperture ratio of the inner sleeve 13 is more than or equal to 30 percent.

As shown in fig. 2, the lower end of the inner housing 13 is sealed by a first sealing plate 16, the upper end of the inner housing 13 is opened to serve as a clean gas outlet 32, annular cover plates 14 for sealing the receiving chamber are provided at both the upper and lower ends of the filter cartridge 1, and the cover plates 14 may be detachably provided to replace the adsorbent 12.

In one embodiment, a support plate 4 is arranged in the cylinder 3, a gas collecting chamber 33 is enclosed between the support plate 4 and the top of the cylinder 3, the support plate 4 separates the gas before and after purification to play a role in sealing and prevent the gas which is not purified from escaping, the upper end of the filter cartridge 1 is arranged on the support plate 4, and the support plate 4 is provided with an opening corresponding to the upper end of the inner sleeve of the filter cartridge 1.

In one embodiment, the filter cartridge 1 further comprises an inner support tube 21 for mounting the inner housing 13 and an outer support tube 22 for mounting the outer housing 11, the inner support tube 21 and the outer support tube 22 are connected by an intermediate connector, which may be a part of the inner support tube 21, integral with the inner support tube 21, and then connected to the outer support tube 22; or the intermediate connector is a part of the outer support tube 22, is integrated with the outer support tube 22 and then is connected with the inner support tube 21; or an independent structure, which is connected with the inner support tube 21 and the outer support tube 22 respectively.

In one embodiment, the middle connector is a bracket 23, the bracket 23 may be a strip structure, a plurality of brackets 23 are arranged between the inner wall of the outer support tube 22 and the outer wall of the inner support tube 21 to support each other, so that the loading of the adsorbent is not affected, the inner sleeve 13 is connected to the lower end of the inner support tube 21, the outer sleeve 11 is connected to the lower end of the outer support tube 22 and can be connected by welding or hanging, wherein a connecting part 24 for external installation is arranged on the outer support tube 22 or the inner support tube 21, and the connecting part is welded or bolted to the support plate 4.

In another embodiment, as shown in fig. 3 and 5, the upper end of the outer support tube 22 is folded outward to form a folded portion, the upper end of the inner support tube 21 is connected with an annular connecting plate, and the connecting plate is connected with the folded portion of the outer support tube 22 by a fastener or welded. The connecting portion 24 is formed by the connecting plate and the folded portion, and a flange hole or the like may be formed in the connecting portion 24.

That is, a connecting plate is welded at the upper end of the inner supporting tube 21, a plurality of annular holes are formed in the position, corresponding to the accommodating cavity, of the connecting plate, and intervals are formed among the annular holes. I.e., the top view of the inner support tube 21, may also be similar to that of fig. 4. In other embodiments, the connecting plate may be connected to the outer support tube 22 and then welded to the inner support tube 21.

In one embodiment, the lower end of the inner housing 13 is sealed by a first sealing plate 16, the lower end of the filter cartridge 1 is provided with a second sealing plate 15 that can be opened and closed, and the lower end of the receiving chamber is sealed by the second sealing plate 15. Specifically, a flange 17 is fixedly connected to the lower end of the outer sleeve 11, and the second sealing plate 15 is detachably connected to the flange 17 through bolts, so that the failed adsorbent 12 can be conveniently opened and replaced.

In one embodiment, the upper end of the receiving chamber is sealed by a cover plate which is detachably connected to the upper end of the inner support tube 21 and/or the outer support tube 22.

In another embodiment, the same type of adsorbent 12 as that in the accommodating cavity is also filled between the inner support tube 21 and the outer support tube 22, the filling height H of the adsorbent 12 between the inner support tube 21 and the outer support tube 22 is greater than the thickness d of the adsorbent layer, the upper end of the accommodating cavity is sealed by the adsorbent 12, and due to the same type of adsorbent 12, when H is greater than d, the resistance of the gas flowing through the H direction is greater than the resistance of the gas flowing through the d direction, so that the gas can pass through the adsorbent layer; a screen 25 or cover plate may also be provided over the location where the adsorbent 12 is sealed to prevent overflow of the adsorbent 12.

In this example, the cross section of the filter cartridge 1 is circular, and the cross-sectional outer contour is circular, but in another embodiment, the cross-sectional outer contour of the filter cartridge 1 may be rectangular.

Wherein, the adsorption layer is one layer to multiple layers, when the adsorption layer is at least two layers, 12 kinds of adsorbents in each layer are the same or different, and different impurities can be adsorbed when the types are different.

Example 2

On the basis of the embodiment 1, the cylinder 3 is divided into at least two subareas along the gas inlet direction in the embodiment.

As shown in fig. 1, 6 and 7, the gas inlet 31 is arranged on the lower side of the cylinder 3, the gas inlet direction is arranged along the radial direction of the cylinder 3, at least two sections are arranged on the cross section of the cylinder 3 along the gas inlet direction from the position close to the gas inlet 31 to the position far away from the gas inlet 31, a plurality of filter cartridges 1 are transversely arranged in each section side by side, and the number, the length or the diameter of the filter cartridges 1 are different among the sections, so that the gas treatment capacity is increased gradually. As shown in fig. 6 and 7, the partition is divided into a plurality of partitions, in this example, 3 partitions, from the near side to the far side in the direction indicated by the arrow, and in other embodiments, the number of partitions may be increased or decreased depending on the size of the cylinder 3.

A plurality of subareas are arranged according to the plane radial distance range from the air inlet of the cylinder 3, and the area of the first subarea, which is closest to the coal gas inlet 31, is a low-flow-rate and low-flow leeward area and is shortest in length matched with the filter cartridge 1; the last area, the high-flow-rate and high-flow windward area farthest from the gas inlet 31, is matched with the longest filter cartridge 1; namely the area between the first zone and the last zone, the length of the filter cartridge 1 is between the first zone and the last zone, and the length of the filter cartridge 1 is increased zone by zone, so that the first-stage automatic distribution of the gas flow is realized.

In this embodiment, three sections are taken as an example, and the length of the filter cartridge 1 is gradually increased from the first section 3a closest to the gas inlet 31 to the third section 3c farthest from the gas inlet 31, which are sequentially divided into the first section 3a, the second section 3b and the third section 3c along the gas inlet direction. As shown in fig. 1, the length of the first section 3a cartridge 1 is smaller than that of the second section 3b cartridge 1, and the length of the second section 3b cartridge 1 is smaller than that of the third section 3c cartridge 1, and the number of the cartridges 1 in each section may be equal or different, for example, may be increased in sequence.

The outer sleeve of the filter cartridge 1 is used for fine dust removal, clean coal gas which flows through the adsorbent and is removed with oil, oxygen, chlorine, sulfur and other impurities is gathered in the V-shaped large-end cavity formed by the inner sleeve, enters the tower body and flows out through the coal gas outlet 32, second-stage automatic distribution of the coal gas flow is realized, the coal gas flow rate passing through each filter cartridge 1 is basically equivalent, the service life of each filter cartridge 1 is ensured to be basically consistent, and the filter cartridge is convenient to maintain. Meanwhile, the airflow can be gradually diffused in a buffer range formed by the height difference of the filter cylinder 1, and the flow equalizing device is self-flow equalizing and self-adapting without being additionally arranged.

In this example, the upper ends of the filter cartridges 1 are flush, and the height of the lower end of the filter cartridge 1 decreases progressively along the gas inlet direction. The structure facilitates uniform installation of the filter cartridges 1, the filter cartridges 1 arranged in areas with larger flow velocity and flow are longer, the flow velocity can be reduced, the filtering area is increased, and the filter cartridges 1 arranged in areas with smaller flow velocity and flow are shorter, so that the flow equalizing effect of coal gas in each area is realized.

In another embodiment, the diameter of the filter cartridge 1 is the same for each section, and the number of sections is different, for example, the number may be increased sequentially.

In this embodiment, the diameter of the cartridge 1 also increases from zone to zone, i.e. the diameter of the cartridge 1 in the second section 3b is greater than the diameter of the cartridge 1 in the first section 3a, and the diameter of the cartridge 1 in the third section 3c is greater than the diameter of the cartridge 1 in the second section 3 b. In other embodiments, the filter cartridges 1 in each zone have the same diameter and different lengths.

As further shown in fig. 7, in the cross section of the cylinder 3, the centers of the filter cartridges 1 of the respective partitions are distributed on the same circular arc centered on the center O of the gas inlet 31 as shown by the two-dot chain line in the figure so as to correspond to the form of diffusion of the gas into the cylinder 3.

As shown in fig. 6, the cross section of the cylinder 3 is divided into three zones along the gas inlet direction, and the radial distance ratio of the farthest boundary of each zone to the center of the gas inlet 31 is D1: D2: D3: 1:2-2.5:4-4.5, so as to reasonably plan the range of each zone.

Example 3

As shown in fig. 8 and 9, since the outer casing of the filter cartridge 1 can be a cloth bag, and the lower end has no supporting structure, the filter cartridge may shake due to long length or influence of air flow, which affects the gas treatment effect, on the basis of embodiment 1 or 2, in this example, a limiting structure 61 is provided for limiting the swing range of the filter cartridge 1 in the transverse plane, so as to control the radial movement range of the filter cartridge 1.

Specifically, as shown in fig. 9, the inner wall of the barrel 3 is provided with a limiting structure 61, the limiting structure 61 can be a limiting block, a limiting plate and the like, the lower end of the filter cartridge 1 is provided with a limiting part, a limiting groove 63 is formed in the limiting structure 61, the limiting part is a limiting pin 62 vertically arranged on the second sealing plate, the limiting pin 62 extends into the limiting groove 63, and a transverse gap is formed between the limiting groove 63 and the limiting groove 63, so that the transverse swinging range of the filter cartridge 1 is limited by the limiting groove 63 and the limiting pin 62, and the structure is also convenient to set and install, and does not affect the replacement of the adsorbent of the filter cartridge 1.

According to the height difference of each subarea, corresponding limiting structures 61 are arranged at different height positions, and the limiting structures 61 can adopt strip-shaped or frame structures, so that the blocking of coal gas is reduced.

Example 4

On the basis of the embodiments 1 to 3, in order to facilitate cleaning of dust on the outer sleeve of the filter cartridge 1 or cleaning of the adsorbent, the composite gas dry purification device further comprises an injection ash removal device 5, wherein the injection ash removal device 5 comprises an air supply device (not shown), an injection main pipe 51 for air intake and an injection branch pipe 52 for reversely injecting the filter cartridge, the injection branch pipe 52 is of an inverted cone-shaped structure with a thick upper part and a thin lower part, the side surface of the injection branch pipe 52 is provided with a plurality of injection ports 53, and the injection branch pipe 52 extends into the filter cartridge. Each of the blowing legs 52 extends into the interior of the corresponding filter cartridge 1, i.e. in the inner sleeve 13, and the filter cartridge 1 is subjected to a back-blowing cleaning through the blowing openings 53, as shown in fig. 8 and 9.

The main pipe 51 is communicated with an air supply device, the diameter of the blowing branch pipe 52 is gradually reduced from top to bottom along the axis, the air inlet end is a large-diameter end and is connected with the blowing main pipe 51, and the end with the smallest section is closed (namely the lower end is closed); the blowing openings 53 have a gradually expanding trumpet-like structure, and the gradually expanding opening diameters of the side walls of each of the blowing branch pipes 52 are equal so that the airflow velocity and the flow rate of each blowing opening 53 are the same.

The diameters of the filter cartridges 1 are different, the sizes of the corresponding blowing branch pipes 52 are different, and the diameters of the blowing branch pipes 52 can be increased along with the increase of the diameters of the filter cartridges 1.

According to the working condition requirement of the dust removal device, the gas supply device can provide inert gas or clean coal gas for ash removal and superheated steam for cleaning pores on the surface of the adsorbent, and the inert gas or the clean coal gas and the superheated steam can be conveyed through different gas supply pipelines.

Example 5

As shown in fig. 10, the difference from example 2 is that the length of the filter cartridge 1 is the same in each partition, and the diameter of the filter cartridge 1 may be increased zone by zone, or the number of filter cartridges 1 may be increased zone by zone. And each filter cartridge 1 can share one limiting structure 61, thereby facilitating the arrangement of the structure.

Because the cross section of the cylinder 3 is sequentially divided into at least two subareas along the gas inlet direction, the diameter or the number of the filter cartridges 1 in each subarea is different, the diameter of the filter cartridges 1 is increased zone by zone and/or the number of the filter cartridges 1 is increased zone by zone, and the first-stage automatic distribution of gas flow is realized. The outer sleeve of the filter cartridge 1 is used for fine dust removal, clean gas which flows through the adsorbent and is removed with oil, oxygen, chlorine, sulfur and other impurities is gathered at the outer side of the injection branch pipe 52 and enters the tower body after passing through the V-shaped large-end cavity formed at the inner side of the inner sleeve, and then flows out, so that the second-stage automatic distribution of the gas flow is realized, the gas flow rate passing through each filter cartridge 1 is basically equivalent, the service life of each filter cartridge 1 is ensured to be basically consistent, and the maintenance is convenient. Meanwhile, the airflow can be gradually diffused in a buffer range formed by the height difference of the filter cylinder 1, and the filter cylinder is self-flow-equalizing and self-adaptive, does not need to be additionally provided with a flow equalizing device, and realizes fine dust removal and gas impurity removal. Sealing devices are arranged on the top of the annular interval of the outer sleeve and the inner sleeve and on the bottom of the inner sleeve and the bottom of the outer sleeve respectively, after the adsorbent fails, the bottom sealing device is opened to unload the adsorbent, the top sealing device is opened to feed the adsorbent, and the adsorbent is reset after the loading and unloading are finished; dust filtered by the outer sleeve 11 can be cleaned by back-blowing, the gas inlet 31 is closed during dust cleaning, dust cleaning gas is blown to the inner sleeve from a back-blowing pipeline and reversely flows through the adsorbent and the outer sleeve 11, the dust is separated from the outer sleeve 11, and a control valve of a blowing gas device is closed after dust cleaning; the dust is collected in the bottom cone section of the cylinder 3 and is discharged after being accumulated to a certain material level.

The invention can remove dust, chlorine, sulfur and other harmful substances which are corrosive to pipelines and equipment in the coal gas at one time, and the dust removal and impurity removal are integrally arranged, thereby greatly saving the occupied area and investment and improving the coal gas treatment efficiency.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.