1. The utility model provides a slag knot device is prevented to circulating fluidized bed waste incinerator, includes furnace base (1), sets up in row's cinder pipe (2) at this furnace base (1) middle part, its characterized in that still includes:

the directional blowing assembly (3) is arranged at the top of the slag discharging pipe (2) and comprises a plurality of directional hoods (31) facing the middle of the slag discharging pipe (2) to blow airflow.

2. A device for preventing slag accretions in a circulating fluidized bed refuse incinerator according to claim 1, characterized in that the end surface of the top end of the slag discharge pipe (2) is lower than the plane of the hearth base (1).

3. The slag knot preventing device of a circulating fluidized bed garbage incinerator according to claim 1, characterized in that a plurality of blast caps (11) are provided on said hearth base (1), and the air outlet of said directional blast cap (31) is lower than the air outlet of said blast caps (11) in the height direction.

4. The slag accretion preventing device of a circulating fluidized bed garbage incinerator according to claim 3, characterized in that the air outlet channel a (111) of said furnace hood (11) is directed obliquely downward to the air flow.

5. The slag accretion preventing device of a circulating fluidized bed garbage incinerator according to claim 3, characterized in that the air outlet channel b (311) of said directional cowl (31) is formed to guide the air flow horizontally or obliquely upward.

6. The slag-bonding preventing device for a circulating fluidized bed garbage incinerator according to claim 1, characterized in that the air outlets of the opposing directional hoods (31) are arranged in a staggered orientation.

7. The slag accretion preventing device of a circulating fluidized bed garbage incinerator according to claim 1, characterized in that the air outlet of said directional cowl (31) is directed to be offset from the center of said slag discharge pipe (2).

8. The slag accretion preventing device of a circulating fluidized bed garbage incinerator according to claim 1, wherein said directional blowing assembly (3) further comprises:

the air inlet ring (32), the air inlet ring (32) encircles the outer side of the slag discharge pipe (2), and the air inlet ring (32) conducts the bottom air inlet of the directional blast cap (31); and

the air inlet pipe (33), the air inlet pipe (33) is communicated with the air inlet ring (32) to supply air to the air inlet ring (32).

9. The slag accretion preventing device of a circulating fluidized bed garbage incinerator according to claim 8, wherein said air inlet duct (33) blows air in two paths from both sides of said air inlet ring (32), respectively.

10. The slag accretion preventing device of a circulating fluidized bed garbage incinerator according to any one of claims 8 or 9, characterized in that said air inlet duct (33) blows air at a pressure of 14KPa or more and at a temperature of 10-40 ℃.

Background

The fluidized bed is in waste incineration disposal process, the slag that burns the production need be discharged from the scum pipe, because the temperature of slag is high, and mix with the material that unburnt completely and arrange down together easily, the phenomenon of the coking of reburning takes place at the scum pipe easily, lead to the slag to pile up, the scum pipe internal diameter reduces, the slag can not the landing smoothly, serious meeting causes stifled dead phenomenon, damage the structure of fluidized bed, need to shut down the stove and clear the sediment processing, seriously influence the output of burning, and equipment life.

The Chinese patent with the application number of CN201910678992.6 discloses a method for controlling coking of an incinerator by an air curtain, wherein a front arch anti-coking nozzle and a rear arch anti-coking nozzle are respectively provided with a high-speed air flow injection device with anti-coking dry powder, the high-speed air flow injection device consists of a plurality of spray pipes and nozzles which are arranged on the cross section of flue gas and close to the wall surface of the incinerator, the high-speed air flow sprayed by the nozzles carries the anti-coking dry powder, the air flow speed is 4-15m/s and is the same as the flow speed of the flue gas, the sprayed air flow is umbrella-shaped, the air flow sprayed by the nozzles of each spray pipe is connected into the air curtain, the thickness of the air curtain is not less than 0.1m, and the air curtain is close to the wall surface of the incinerator to flow so as to protect the wall surface at the rear end in the flow direction of the flue gas.

However, in the prior art solution, there are the following technical problems: 1. unburned substances directly fall down from the slag discharge pipe and are re-combusted in the slag discharge pipe to form coke; 2. the hearth is filled with high-temperature fluidized substances, the temperature of the slag discharge pipe is high, and discharged slag is easy to ignite again.

Disclosure of Invention

Aiming at the problems, the invention provides a device for preventing slag from being combined in a circulating fluidized bed garbage incinerator, which is characterized in that an air curtain is formed by blowing air flow towards the middle part of a slag discharge pipe through a directional hood to prevent combustion substances in a fluidized bed from directly falling off, and meanwhile, the directional hood blows cold air to reduce the temperature of slag entering the slag discharge pipe, thereby not only solving the technical problem that unburned substances directly fall off from the slag discharge pipe to cause reburning in the slag discharge pipe in the prior art, but also solving the technical problem that high-temperature slag is coked in the slag discharge pipe to cause blockage of the slag discharge pipe.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a slag knot device is prevented to circulating fluidized bed waste incinerator, includes the furnace base, sets up in the scum pipe in this furnace base middle part, its characterized in that still includes:

and the directional blowing assembly is arranged at the top of the deslagging pipe and comprises a plurality of directional hoods, and the directional hoods blow airflow towards the middle part of the deslagging pipe.

As an improvement, the end surface of the top end of the slag discharging pipe is lower than the plane of the hearth base.

As an improvement, a plurality of furnace air caps are arranged on the hearth base, and the air outlets of the directional air caps are lower than the air outlets of the directional air caps in the height direction.

As an improvement, the air outlet channel a of the directional hood guides the air flow downwards in an inclined mode.

As an improvement, the air outlet channel b of the directional hood is horizontally or obliquely upwards directed to the air flow.

As an improvement, the pointing directions of the air outlets of the opposite directional blast caps are arranged in a staggered mode.

As an improvement, the pointing direction of the air outlet of the directional blast cap deviates from the center of the slag discharge pipe.

As an improvement, the directional blowing assembly further comprises:

the air inlet ring surrounds the outer side of the slag discharge pipe and is communicated with an air inlet at the bottom of the directional blast cap; and the air inlet pipe is communicated with the air inlet ring and supplies air to the air inlet ring.

As an improvement, the air inlet pipe blows air from two sides of the air inlet ring respectively in two paths.

As an improvement, the air pressure of air blown by the air inlet pipe is greater than or equal to 14KPa, and the temperature is 10-40 ℃.

The invention has the beneficial effects that:

(1) according to the invention, the directional hood blows airflow towards the middle part of the slag discharge pipe to form an air curtain to prevent the direct falling of the combustion substances in the fluidized bed, and simultaneously, the directional hood blows cold air to reduce the temperature of the slag, so that the problem of reburning of the slag in the slag discharge pipe is solved, and the problem of blocking the slag discharge pipe due to coking of high-temperature slag in the slag discharge pipe is also solved;

(2) the secondary air with large air pressure, high air speed and low temperature is blown out from the directional blast cap, so that the direct falling of combustion substances is favorably prevented, the air can form a vortex in the middle of the slag discharge pipe to guide the slag to be discharged downwards, and the slag is prevented from forming coking on the pipe wall of the slag discharge pipe;

(3) according to the invention, the directional wind caps are arranged to be blown in a staggered and opposite manner, so that the reduction of the flow velocity of the airflow caused by the collision of the bidirectional airflow is prevented, and the airflow bearing is realized to avoid the direct falling of the comburent.

In conclusion, the invention has the advantages of preventing the burning objects from directly falling, reducing the temperature of the slag, bearing airflow and the like, and is particularly suitable for the field of waste incineration equipment.

Drawings

FIG. 1 is an overall elevational schematic view of the present invention;

FIG. 2 is an axial schematic view of the present invention;

FIG. 3 is a bottom perspective view of the present invention;

FIG. 4 is an enlarged view of the point A in FIG. 2;

FIG. 5 is a schematic cross-sectional view of a furnace hood according to the present invention;

FIG. 6 is a schematic cross-sectional view of the directional hood of the present invention;

FIG. 7 is a schematic diagram of the operation of the fluidization process of the present invention;

FIG. 8 is a schematic view of the operation of the directional hood of the present invention;

FIG. 9 is a schematic top view of a second embodiment of the present invention;

fig. 10 is a schematic top view of a third embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example one

As shown in fig. 1 to 4, a slag coking prevention device of a circulating fluidized bed garbage incinerator comprises a hearth base 1, a slag discharge pipe 2 arranged in the middle of the hearth base 1, and further comprises:

and the directional blowing assembly 3 is arranged at the top of the slag discharging pipe 2 and comprises a plurality of directional hoods 31 facing the middle part of the slag discharging pipe 2 to blow airflow.

It should be noted that the directional hood 31 blows air toward the middle of the slag discharging pipe 2, an air curtain is formed at the upper end opening of the slag discharging pipe 2, unburned substances are blown upward by the air curtain, and the slag which is burned and formed into particles or blocks can smoothly fall down through the air curtain due to the high density of the slag and be discharged from the slag discharging pipe 2.

Further, the end surface of the top end of the slag discharging pipe 2 is lower than the plane of the hearth base 1.

It should be noted that the hearth base 1 carries the garbage waste to be combusted, and the end surface of the top end of the slag discharge pipe 2 is lower than the plane of the hearth base 1, so that the downward discharge of the slag after the combustion is facilitated.

Further, a plurality of furnace hoods 11 are arranged on the hearth base 1, and the air outlet of the directional hood 31 is lower than the air outlet of the furnace hoods 11 in the height direction.

As shown in fig. 5, further, the air outlet channel a111 of the furnace hood 11 directs the air flow obliquely downward.

As shown in fig. 7, it should be noted that the air outlet of the furnace hood 11 is arranged obliquely downward, and the blown air flow can blow up and fly the substances carried on the plane of the hearth base 1, so as to complete combustion in the air and prevent coking on the plane of the hearth base 1.

As shown in fig. 6, further, the air outlet channel b311 of the directional hood 31 guides the air flow horizontally or obliquely upwards.

As shown in fig. 8, it should be noted that the air outlet of the directional hood 31 is arranged obliquely upward, so that the combustible substances with relatively low specific gravity, which are included in the slag to be discharged from the slag discharge pipe 2, can be blown up again, and the slag with high density, which is formed after being burned out, can pass through the air curtain of the directional hood 31.

Further, the directional blowing assembly 3 further includes:

the air inlet ring 32 is encircled outside the slag discharge pipe 2, and the air inlet ring 32 is communicated with the bottom air inlet of the directional blast cap 31; and

an air inlet pipe 33, wherein the air inlet pipe 33 is communicated with the air inlet ring 32 to supply air to the air inlet ring 32.

It should be noted that, the outside of the air inlet ring 32 is further covered with a primary air inlet box 12, and the primary air inlet box 12 is communicated with the furnace hood 11 to blow large-flow and high-temperature gas into the furnace chamber for burning fluidized substances.

Further, the air inlet duct 33 blows air in two paths from both sides of the air inlet ring 32, respectively.

It should be noted that the air blown from both sides can quickly reach the directional hood 31 and rush out into the furnace chamber, and quickly reach the work of forming the air curtain.

Further, the air pressure of the air blown by the air inlet pipe 33 is greater than or equal to 14KPa, and the temperature is 10-40 ℃.

It should be noted that the air blown from the air inlet pipe 33 is secondary air, which is set to a high pressure, a low temperature and a small flow rate, separately from the air flow blown from the furnace hood 11, and is used for rapidly cooling the slag and preventing coking.

Example two

As shown in fig. 9, in which the same or corresponding components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, only the differences from the first embodiment will be described below for the sake of convenience: the second embodiment is different from the first embodiment in that:

in this embodiment, the directing directions of the outlets of the opposing directional hoods 31 are offset.

It should be noted that the directional hoods 31 arranged in a staggered manner avoid the reduction of the airflow speed of the air due to the impact of the air on the front surface, which affects the blocking effect.

EXAMPLE III

As shown in fig. 10, in which the same or corresponding components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, only the differences from the first embodiment will be described below for the sake of convenience: the third embodiment is different from the first embodiment in that:

in this embodiment, the direction of the outlet of the directional hood 31 is offset from the center of the slag discharge pipe 2.

It should be noted that the air outlet deviating from the center of the slag discharging pipe 2 can form spiral air to facilitate discharging of slag and prevent coking of slag on the pipe wall of the slag discharging pipe 2.

The working process is as follows:

opening the furnace hood 11 to blow high-temperature gas, throwing garbage wastes to be incinerated to the hearth base 1 at the upper part of the fluidized bed, blowing the garbage wastes by the large-flow air flow of the furnace hood 11 to fluidize and then incinerate in the air, carrying out directional blowing on the slag by the directional blowing component 3 arranged at the opening of the slag discharge pipe 2, discharging the slag from the slag discharge pipe 2, and blowing secondary air with small loading amount, large air pressure and low temperature of the air inlet pipe 33 to blow the slag in the blowing process, so that the temperature of the slag is reduced, and the reburning coking is avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.