1. A stirring device of a low-speed rotating superconductor garbage cracking gasification furnace comprises a cracking gasification furnace body; a rotating stirring rod (1) is arranged in the cracking gasification furnace body; be provided with heat conduction broach (2) on the lateral wall of puddler, its characterized in that there is inclosed first cavity in the inside of puddler (1) there is inclosed second cavity in the inside of heat conduction broach (2), first cavity with the second cavity intercommunication, the diapire slope of second cavity sets up, just the second cavity with the junction of first cavity is the slope low point.

2. The stirring device of claim 1, wherein the first cavity and the second cavity form a superconducting cavity space (26), the superconducting cavity space (26) is a sealed vacuum space, and the internal static vacuum degree is 1.5X10^-3Pa, the working state is positive pressure.

3. The stirring device of a low-speed rotating superconductor garbage pyrolysis gasifier according to claim 1, wherein the inclination angle of the bottom wall of the second chamber is greater than 12 degrees based on the horizontal direction, and the stirring rod (1) is connected with the heat-conducting pulling knife (2) in a welding manner.

4. The stirring device of the low-speed rotating superconductor garbage pyrolysis gasifier according to claim 1, wherein a phase change working medium (8) is filled in the first cavity, the volume of the phase change working medium (8) accounts for 24% -28% of the volume of the superconducting cavity space (26), the phase change working medium (8) is activated liquid metal sodium-potassium alloy with the working temperature of 450-800 ℃, and the mixing weight of sodium and potassium is 2: 5.

5. The stirring device of the low-speed rotating superconductor garbage pyrolysis gasifier according to claim 1, wherein the phase change working medium (8) is activated liquid metal mercury with the working temperature of 450-800 ℃ and 0.7% of Ti and 6% of 0Cr₂₅Ni₂₀And (3) pulverizing.

6. The stirring device of claim 1, further comprising a plug (30) for sealing the stirring rod (1), wherein the stirring rod (1) is made of 0Cr₂₅Ni₂₀The heat conduction pull-out knife (2) and the plug (30) are both made of 0Cr₂₅Ni₂₀The steel plate is statically detected at all welding positions by a helium mass spectrometer leak detector, and the leakage rate is less than 3.3X10^-9Pa.L/S。

7. The stirring device of the low-speed rotating superconductor garbage pyrolysis gasifier according to claim 1, wherein a heat exchange fin (10) is arranged below the stirring rod (1), the heat exchange fin (10) is any one of a chrysanthemum-shaped fin, a strip-shaped fin and a scale-shaped fin, and the effective area of the heat exchange fin (10) is larger than or equal to the effective area of the periphery of the stirring rod (1).

8. The stirring device of the low-speed rotating superconductor garbage pyrolysis gasifier according to claim 1, wherein the pyrolysis gasifier body is connected with the stirring rod (1) through an upper sealing bearing pair (3), the upper sealing bearing pair (3) comprises an upper circular sealing sleeve (18) welded on the upper part of a closed container tank (7), an upper graphite bearing (19) fixed in the upper circular sealing sleeve (18), a mixture is filled between the upper circular sealing sleeve (18) and the upper graphite bearing (19), the height of the mixture is higher than that of the upper graphite bearing (19), an upper annular steel ring (21) is arranged on the upper part of the mixture, the outer diameter of the upper annular steel ring (21) is smaller than the inner diameter of the upper circular sealing sleeve (18), the inner diameter of the upper annular steel ring (21) is larger than the outer diameter of the stirring rod (1), when the stirring rod (1) works, the mixture is in close contact with the stirring rod (1).

9. The stirring device of the low-speed rotating superconductor garbage pyrolysis gasifier according to claim 1, wherein the pyrolysis gasifier body is connected with the stirring rod (1) through a lower sealing bearing pair (4), the lower sealing bearing pair (4) comprises a lower circular sealing sleeve (22) welded at the lower part of a closed container tank (7), a lower graphite bearing (23) fixed in the lower circular sealing sleeve (22), a mixture is filled between the lower circular sealing sleeve (22) and the lower graphite bearing (23), the height of the mixture is higher than that of the lower graphite bearing (23), a lower annular steel ring (25) is arranged at the upper part of the mixture, the outer diameter of the lower annular steel ring (25) is smaller than the inner diameter of the lower circular sealing sleeve (22), the inner diameter of the lower annular steel ring (25) is larger than the outer diameter of the stirring rod (1), when the stirring rod (1) works, the mixture is in close contact with the stirring rod (1).

10. The stirring device of a low-speed rotating superconductor garbage cracking gasifier according to claim 8 or 9, wherein the mixture is prepared by mixing any one of high-temperature resistant graphite fibers (20), heat-resistant graphite aluminum silicate fibers, high-temperature ceramic wires and carbon fibers with graphite paste according to a ratio of 7: 3.

Background

The treatment of urban and rural domestic garbage becomes an important work for the coordinated development of energy, environment and society, and becomes an important and urgent task for governments at all levels in China. The garbage cracking gasification furnace is advanced equipment for realizing reduction, harmlessness and recycling of garbage, and the garbage cracking gasification furnace is used for cracking and treating the garbage by attention of countries in the world at present when the 'garbage city' becomes public nuisance.

The existing garbage cracking gasification furnace is used for promoting the mixing of garbage in a closed container tank and improving the heat transfer efficiency, a stirring rod is additionally arranged at the center of the closed container tank of the garbage cracking gasification furnace, the stirring rod is a superconducting heat conducting rod, a heat dissipation shifting knife and a heat exchange fin are arranged on the outer side of the superconducting heat conducting rod, a power device drives the superconducting heat conducting rod to rotate, a phase-change working medium in the superconducting heat conducting rod is heated and gasified, heat is generated, and the heat is transferred to the garbage at the center of the closed container tank through the heat dissipation shifting knife and the heat exchange fin.

The existing garbage cracking gasification furnace still has the defects that garbage at the central part and the periphery of a closed container tank is heated insufficiently in the use process, so that the reaction rate of the garbage at the central part and the periphery of the closed container tank is low, the gas production rate and the volatile matter quality of the cracking gasification furnace are influenced, the garbage residue in the discharged residue is excessive, and even the danger of blockage of a gas transmission pipeline and coking of a furnace wall due to excessive cracking oil occurs.

Disclosure of Invention

The invention aims to provide a stirring device of a low-speed rotating superconductor garbage pyrolysis gasification furnace, wherein a closed cavity is arranged in a heat conduction pull knife, the closed cavity in the heat conduction pull knife is communicated with the closed cavity in a stirring rod, so that the space of a superconducting cavity is increased, the problems of insufficient heat gain and low reaction rate of garbage at the central part and the periphery of a closed container tank in the use process of the garbage pyrolysis gasification furnace are solved, the heat can be more quickly transmitted to the garbage at the central part and the periphery of the closed container tank, the heat transmission efficiency is improved, the heat gain of the garbage at the central part and the periphery is more sufficient and uniform, and the reaction rate of the garbage in the closed container tank is improved.

The invention is realized by the following technical scheme:

a stirring device of a low-speed rotating superconductor garbage cracking gasification furnace comprises: a pyrolysis gasification furnace body; a rotating stirring rod is arranged in the cracking gasification furnace body; be provided with heat conduction broach on the lateral wall of puddler, there is inclosed first cavity in the inside of puddler, has inclosed second cavity in the inside of heat conduction broach, first cavity and second cavity intercommunication, the diapire slope of second cavity sets up, and the junction of second cavity and first cavity is the slope low point.

According to the stirring device for the low-speed rotating superconductor garbage pyrolysis gasification furnace, the closed second cavity is arranged in the heat conduction pull knife and is communicated with the closed first cavity in the stirring rod, so that the space of the superconducting cavity is increased, heat can be more quickly transferred to garbage in the central part and around the closed container tank through the space of the superconducting cavity, the heat transfer efficiency is improved, the garbage in the central part and around the closed container tank can be heated more sufficiently and uniformly, and the reaction rate of the garbage in the central part and around the closed container tank is improved. The diapire slope of second cavity sets up, and the junction of second cavity and first cavity is the slope low point, has guaranteed the phase change working medium of latent heat uninstallation and has become liquid back by the gaseous state, under gravity and revolving force effect, liquid phase change working medium flows back to the evaporation end in dialling the sword from heat conduction fast.

Furthermore, the first cavity and the second cavity form a superconducting cavity space, the superconducting cavity space is a sealed vacuum state space, and the internal static vacuum degree is 1.5X10^-3Pa, the working state is positive pressure.

Vacuum state, i.e. vacuum space state, and internal static vacuum degree of 1.5X10^-3Pa, high vacuum state in vacuum degree. Under the high vacuum state, the heat transfer speed of the superconducting cavity space approaches to the sonic speed, the heat conversion efficiency reaches 99%, the heat conductivity is more than 5000 times of that of a common auger, under the rotating state, most heat energy generated by a heater is directly and quickly conducted to the central part and surrounding garbage by the superconducting cavity space, the space cracking temperature in the whole closed container can quickly and evenly reach about 600 ℃, the garbage is quickly heated in a reaction zone, the cracking speed is high, and the danger of garbage carbonization and coking caused by local overheating of a conventional cracking device is avoided.

Furthermore, the inclination angle of the bottom wall of the second chamber is larger than 12 degrees by taking the horizontal direction as a reference, and the stirring rod is connected with the heat conduction pull knife in a welding mode.

The inclination angle of the bottom wall of the second chamber is set to be larger than 12 degrees, and the phase change working medium in the heat conduction poking knife can smoothly flow back into the stirring rod after heat is transferred. The stirring rod is connected with the heat conduction pull knife in a welding mode, and the airtightness of the superconducting cavity space is guaranteed.

Furthermore, a phase change working medium is filled in the first cavity, and the volume of the phase change working medium accounts for 24% -28% of the volume of the space of the superconducting cavity.

Further, the phase-change working medium is activated liquid metal sodium-potassium alloy with the working temperature of 450-800 ℃, and the mixing weight of sodium and potassium is 2: 5.

Further, the phase-change working medium is activated liquid metal mercury with the working temperature of 450-800 ℃ and 0.7% of Ti and 6% of 0Cr₂₅Ni₂₀And (3) pulverizing.

Further, the stirring rod also comprises a plug for sealing the stirring rod, and the stirring rod is made of 0Cr₂₅Ni₂₀The heat conducting pull-out knife and the plug of the stainless seamless steel pipe are all made of 0Cr₂₅Ni₂₀The steel plate is statically detected at all welding positions by a helium mass spectrometer leak detector, and the leakage rate is less than 3.3X10^-9Pa.L/S。

0Cr₂₅Ni₂₀The (high-chromium-nickel austenitic stainless steel) has good oxidation resistance, corrosion resistance and creep strength, can continuously operate at high temperature, and has good high temperature resistance, so that 0Cr is adopted₂₅Ni₂₀The material improves the service life of the stirring rod, the heat conduction pull-out knife and the plug, and reduces the maintenance rate. All welding parts are statically detected by adopting a helium mass spectrometer leak detector, and the leak rate is less than 3.3X10^-9Pa.L/S, ensure the sealing performance of the superconducting cavity space.

Furthermore, a heat exchange fin is arranged below the stirring rod, the heat exchange fin is any one of a chrysanthemum-shaped fin, a strip-shaped fin and a scale-shaped fin, and the effective area of the heat exchange fin is larger than or equal to the effective area of the periphery of the stirring rod.

The heat exchange fins are arranged in a chrysanthemum shape, a strip shape or a scale shape, so that the effective area of the heat exchange fins is increased, heat absorption is facilitated, and in order to ensure sufficient heat absorption, the effective area of the heat exchange fins is set to be larger than or equal to the effective area of the periphery of the stirring rod.

Furthermore, the cracking gasification furnace body is connected with the stirring rod through an upper sealing bearing pair, the upper sealing bearing pair comprises an upper circular sealing sleeve welded on the upper portion of the closed container tank, an upper graphite bearing fixed in the upper circular sealing sleeve, a mixture is filled between the upper circular sealing sleeve and the upper graphite bearing, the height of the mixture is higher than that of the upper graphite bearing, an upper annular steel ring is arranged on the upper portion of the mixture, the outer diameter of the upper annular steel ring is smaller than the inner diameter of the upper circular sealing sleeve, the inner diameter of the upper annular steel ring is larger than the outer diameter of the stirring rod, and when the stirring rod works, the mixture is in close contact with the stirring rod.

The pyrolysis gasifier body is connected with the stirring rod through the upper sealing bearing pair, and the upper sealing bearing pair is arranged to effectively prevent air from entering the closed container tank when the stirring rod rotates, so that the safety of the garbage pyrolysis gasifier in the working state is ensured.

Furthermore, the cracking gasification furnace body is connected with the stirring rod through a lower sealing bearing pair, the lower sealing bearing pair comprises a lower circular sealing sleeve welded on the lower portion of the closed container tank, a lower graphite bearing fixed in the lower circular sealing sleeve, a mixture is filled between the lower circular sealing sleeve and the lower graphite bearing, the height of the mixture is higher than that of the lower graphite bearing, a lower annular steel ring is arranged on the upper portion of the mixture, the outer diameter of the lower annular steel ring is smaller than the inner diameter of the lower circular sealing sleeve, the inner diameter of the lower annular steel ring is larger than the outer diameter of the stirring rod, and when the stirring rod works, the mixture is in close contact with the stirring rod.

The pyrolysis gasifier body is paid through sealed bearing down and is connected with the puddler, sets up sealed bearing and pays effectually to have prevented that the puddler from rotating the time the air gets into the closed container jar down, ensures the safety under the rubbish pyrolysis gasifier operating condition.

Further, the mixture is prepared by mixing any one of high-temperature resistant graphite fibers, heat-resistant graphite aluminum silicate fibers, high-temperature ceramic wires and carbon fibers with graphite paste according to a ratio of 7: 3.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. according to the stirring device for the low-speed rotating superconductor garbage pyrolysis gasification furnace, the closed second cavity is arranged in the heat conduction pull knife and is communicated with the closed first cavity in the stirring rod, so that the space of the superconducting cavity is increased, heat can be more quickly transferred to garbage at the center and around the closed container tank through the space of the superconducting cavity, the heat transfer efficiency is improved, the garbage at the center and around can be heated more sufficiently and uniformly, and the reaction rate of the garbage at the center and around the closed container tank is improved.

2. According to the stirring device for the low-speed rotating superconductor garbage pyrolysis gasification furnace, most of heat energy generated by the heater is directly and quickly conducted to the central part and surrounding garbage by arranging the superconducting cavity space, the space pyrolysis temperature in the whole closed container can quickly and evenly reach about 600 ℃, the garbage is heated quickly in the reaction zone, the pyrolysis speed is high, and the danger of carbonization and coking of the garbage caused by local overheating of a conventional pyrolysis device is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

Reference numerals: 1-a stirring rod; 2-heat conduction poking knife; 3-upper sealing bearing pair; 4-lower sealed bearing pair; 5-rotating the chain plate; 6-a power plant; 7-closed container tank; 8-phase change working medium; 9-evaporation end; 10-heat exchange fins; 11-a heater; 12-a chain; 13-garbage; 14-a hot flue; 15-the gas outlet of the gasification furnace; 16-a slag outlet; 17-a furnace housing; 18-upper circular sealing sleeve; 19-upper graphite bearings; 20-high temperature resistant graphite fibers; 21-upper annular steel ring; 22-lower circular sealing sleeve; 23-lower graphite bearings; 25-lower annular steel ring; 26-superconducting cavity space; 27-a heating field; 28-a gas delivery pipeline; 30-plug.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

The invention is described in further detail below with reference to fig. 1.

The utility model provides a rotatory superconductor rubbish pyrolysis gasifier agitating unit of low-speed, as shown in figure 1, including pyrolysis gasifier body, this internal pivoted puddler 1 that is provided with of pyrolysis gasifier, set up heat conduction pull out sword 2 on the lateral wall of puddler 1, there is inclosed first cavity in the inside of puddler 1, there is inclosed second cavity in the inside of heat conduction pull out sword 2, first cavity and second cavity intercommunication, the diapire slope of second cavity sets up, and the junction of second cavity and first cavity is the slope low point.

As shown in fig. 1, the pyrolysis gasifier body includes a sealed container tank 7 and a furnace shell 17 disposed outside the sealed container tank 7, the sealed container tank 7 is connected to the upper portion of the stirring rod 1 through an upper sealed bearing pair 3, the sealed container tank 7 is connected to the lower portion of the stirring rod 1 through a lower sealed bearing pair 4, a heat flue 14 is disposed between the sealed container tank 7 and the furnace shell 17, the heat flue 14 is used for transferring heat, a gasifier gas outlet 15 is disposed at the upper left of the sealed container tank 7, gasified mixed gas flows out from the gasifier gas outlet 15, a slag outlet 16 is disposed at the lower left, and residual slag after combustion flows out from the slag outlet 16.

The first cavity and the second cavity form a superconducting cavity space 26, the superconducting cavity space 26 is a sealed vacuum space, and the internal static vacuum degree is 1.5X10^-3Pa, the working condition is positive pressure, and with the horizontal direction as the benchmark, the inclination of the diapire of second cavity is greater than 12 degrees, and during operation, gaseous phase transition working medium gets into heat conduction pull out sword 2 by the cavity of puddler 1, and liquid phase transition working medium flows back by heat conduction pull out sword 2 and gets into puddler 1 under gravity and revolving force effect behind the latent heat uninstallation to flow back smoothly and get into puddler 1 after the heat has been transferred to phase transition working medium 8 in the heat conduction pull out sword 2.

The upper end of the stirring rod 1 is welded with a rotating chain disc 5, the rotating chain disc 5 is connected with a power device 6 through a chain 12, the power device 6 works, the chain 12 drives the rotating chain disc 5, the stirring rod 1 and the heat-conducting shifting knife 2 rotate in the garbage cracking gasification furnace, the heat-conducting shifting knife 2 enhances the heat transfer effect of garbage 13 when stirring the garbage 13 in the garbage cracking gasification furnace, the heat obtained from the evaporation end 9 is rapidly transferred to the garbage 13 in the middle of the garbage cracking gasification furnace through the heat-conducting shifting knife 2, the heat obtained from the heater 11 and the heat flue 14 at the periphery and the bottom of the closed container tank 7 is transferred to the garbage near the heat-conducting wall from the heat-conducting wall part of the closed container tank 7, and the garbage cracking rate of the whole cracking gasification.

A heating device is arranged below the stirring rod 1 and consists of an evaporation end 9 arranged at the lower end of the stirring rod 1, a plurality of heat exchange fins 10 welded on the outer side of the evaporation end 9 and a heater 11 arranged below the evaporation end 9, a heating field 27 is arranged between the evaporation end 9 and the heater 11, a fuel gas conveying pipeline 28 is arranged at the lower left of the heater 11, and gasified mixed gas flows out of a gasification furnace gas outlet 15, is treated and then enters the heater 11 through the fuel gas conveying pipeline 28 to serve as garbage cracking fuel.

The first cavity is internally provided with a phase change working medium 8, the phase change working medium 8 is activated liquid metal sodium-potassium alloy with the working temperature of 450-800 ℃, and the mixing weight of sodium and potassium is 2: 5.

The phase-change working medium 8 is activated liquid metal mercury with the working temperature of 450-800 ℃ and 0.7% of Ti and 6% of 0Cr₂₅Ni₂₀And (3) pulverizing.

The volume of the phase change working medium 8 accounts for 24-28% of the volume of the superconducting cavity space 26.

The stirring device also comprises a plug 30 for sealing the stirring rod 1, and the stirring rod 1 is made of 0Cr₂₅Ni₂₀The heat conducting pull knife 2 and the plug 30 of the stainless seamless steel pipe are made of 0Cr₂₅Ni₂₀The steel plate is statically detected at all welding positions by a helium mass spectrometer leak detector, and the leakage rate is less than 3.3X10^-9Pa.L/S。

The heat exchange fins 10 are arranged below the stirring rod 1, the heat exchange fins 10 are any one of chrysanthemum-shaped fins, strip-shaped fins and scale-shaped fins, and the effective area of the heat exchange fins 10 is larger than or equal to the effective area of the periphery of the stirring rod 1.

The cracking gasification furnace body is connected with the stirring rod 1 through the upper sealing bearing pair 3, the upper sealing bearing pair 3 comprises an upper circular sealing sleeve 18 welded on the upper portion of the closed container tank 7, an upper graphite bearing 19 fixed in the upper circular sealing sleeve 18, a mixture is filled between the upper circular sealing sleeve 18 and the upper graphite bearing 19, the height of the mixture is higher than that of the upper graphite bearing 19, an upper annular steel ring 21 is arranged on the upper portion of the mixture, the outer diameter of the upper annular steel ring 21 is smaller than the inner diameter of the upper circular sealing sleeve 18, the inner diameter of the upper annular steel ring 21 is larger than the outer diameter of the stirring rod 1, and when the stirring rod 1 works, the mixture is in close contact with the stirring rod 1.

The cracking gasification furnace body of the cracking gasification furnace body is connected with the stirring rod 1 through the lower sealing bearing pair 4, the lower sealing bearing pair 4 comprises a lower circular sealing sleeve 22 welded on the lower portion of the closed container tank 7, a lower graphite bearing 23 fixed in the lower circular sealing sleeve 22, a mixture is filled between the lower circular sealing sleeve 22 and the lower graphite bearing 23, the height of the mixture is higher than that of the lower graphite bearing 23, a lower annular steel ring 25 is arranged on the upper portion of the mixture, the outer diameter of the lower annular steel ring 25 is smaller than the inner diameter of the lower circular sealing sleeve 22, the inner diameter of the lower annular steel ring 25 is larger than the outer diameter of the stirring rod 1, and when the stirring rod 1 works, the mixture is in close contact with the stirring rod 1.

The mixture is prepared by mixing any one of high-temperature resistant graphite fiber, heat-resistant graphite aluminum silicate fiber, high-temperature ceramic wire and carbon fiber with graphite paste according to the proportion of 7: 3.

The working principle is as follows:

the garbage 13 is loaded into a reaction area of a closed container tank 7 of a garbage cracking gasification furnace, a heater 11 works below the closed container tank 7, a power device 6 is connected with electricity, a chain 12 drives a rotating chain disc 5, a stirring rod 1 and a heat conduction shifting knife 2 to rotate at a rotating speed of 5-7 rpm in the garbage cracking gasification furnace, the heat conduction shifting knife 2 turns over the garbage in the garbage cracking gasification furnace to enhance the heat transfer effect of the garbage, a heating field of the heater 11 heats an evaporation end 9 of the stirring rod 1, the bottom of the closed container tank 7 is heated, the periphery of the closed container tank 7 is heated through a heat flue 14, a phase change working medium 8 is gasified, heat is rapidly transferred to the garbage 13 in the middle of the garbage cracking gasification furnace through the stirring rod 1 and the heat conduction shifting knife 2, the heat obtained from the heating field of the garbage cracking gasification furnace heater 11 and the heat flue 14 at the periphery and the bottom of the closed container tank 7 of the garbage cracking, the garbage 13 is pyrolyzed, after the phase change working medium 8 is rapidly conducted to the garbage 13 through the stirring rod 1 and the heat conduction poking knife 2, the phase change working medium 8 unloaded by latent heat is changed from a gas state to a liquid state, and flows back to the evaporation end 9 from the heat conduction poking knife 2 and the stirring rod 1 under the action of gravity and rotary centrifugal force to be continuously gasified by heat, so that the radiant heat of the burner is continuously supplied to the garbage 13 in the reaction area of the closed container tank 7 of the garbage pyrolysis gasification furnace in cycles, and the garbage 13 is continuously pyrolyzed and gasified. The gasified mixed gas flows out from the gas outlet 15 of the garbage cracking gasification furnace, and enters the heater 11 as garbage cracking fuel through the gas conveying pipeline 28 after being processed.

The present embodiment is only for explaining the invention, and it is not limited to the invention, and those skilled in the art can make modifications to the embodiment as necessary without inventive contribution after reading the present specification, but all of them are protected by the patent law within the scope of the present invention.