CN212051260U - Compound dechlorination household garbage gasification treatment system - Google Patents
Compound dechlorination household garbage gasification treatment system Download PDFInfo
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- CN212051260U CN212051260U CN202020028568.5U CN202020028568U CN212051260U CN 212051260 U CN212051260 U CN 212051260U CN 202020028568 U CN202020028568 U CN 202020028568U CN 212051260 U CN212051260 U CN 212051260U
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Abstract
The utility model relates to a domestic waste gasification processing system of compound dechlorination, including gasifier and compound dechlorination system, its characterized in that, compound dechlorination system includes chlorine coarse filter and cyclone dechlorination device, and chlorine coarse filter is including locating the filter that a plurality of blocks set up from top to bottom in the gasifier and locating the calcium mouth that spouts on the gasifier, and filter one end links to each other with the gasifier, and the filter is set up to the free end downward sloping by the stiff end, and the gasifier includes gasification reaction layer and is used for placing chlorine coarse filter's filter layer, and gasification reaction layer's top is located to the filter layer, spouts calcium mouth and locates gasification reaction layer department. The utility model provides a to the direct degree of depth dechlorination of combustible gas after the gasifier generates the combustible gas, avoid the combustible gas to produce high temperature corrosion to follow-up equipment to improve steam parameter and improve the generating efficiency, and help reducing the domestic waste gasification processing system of the compound dechlorination of the low temperature heterogeneous catalysis synthesis of dioxin in the flue gas cooling process.
Description
Technical Field
The utility model relates to a domestic waste gasification treatment system especially relates to a domestic waste gasification treatment system of compound dechlorination.
Background
The treatment and disposal of domestic garbage and other wastes are important problems which need to be solved urgently in China, wherein the incineration power generation technology has the advantages of high harmless degree, obvious volume reduction and weight reduction effects, energy recycling and the like, and is rapidly developed and applied in recent years. However, the domestic garbage inevitably generates secondary pollutants in the incineration process, especially chlorine-containing pollutants such as dioxin, hydrogen chloride (HCl) and the like, and the secondary pollutants are harmful to the environment and human health. On one hand, chlorine contained in the household garbage mainly forms HCl after incineration, and the content of the HCl in the garbage incineration smoke can reach 800-3Is one of the main causes of acid rain, and HCl is easy to cause high-temperature corrosion of equipment, so that steam parameters (generally not higher than 400) of waste incineration power generation are limitedoC. 4 MPa) resulting in a power generation efficiency of only around 20%, much lower than coal fired power plant efficiency. On the other hand, HCl in the incineration flue gas is used as a chlorine source, and plays a key role in directly or indirectly generating dioxin in the flue gas cooling process. Therefore, solving the emission control problem of chlorine-containing pollutants and the like is the key point and difficult point of the current development of waste incineration technology.
The two-step garbage incineration technology based on the household garbage pyrolysis gasification and combustible gas combustion has outstanding advantages in the aspects of reducing pollution emission and improving power generation efficiency. The product of pyrolysis gasification of rubbish is combustible gas, can carry out burning utilization after purification treatment such as dechlorination in advance to reduce and burn HCl content in the flue gas, reduce the low temperature heterogeneous catalysis synthesis of dioxin in the flue gas cooling process, effectively solve traditional msw incineration and can only pass through the problem of low temperature tail gas cleanup unit desorption pollutant. And due to the fact thatThe HCl in the combustible gas can be removed to solve the problem of corrosion of the heating surface of the flue gas after incineration, and the subsequent power generation system can select high steam parameters (such as 540)oC. 12 MPa), the power generation efficiency is remarkably improved. However, the post-dechlorination technology only adopting a medium-high temperature combustible gas furnace has the problems of low efficiency, large using amount of dechlorinating agent, high dechlorinating cost and the like. In summary, there is a need to develop a system and a method for removing chlorine-containing pollutants in the process of pyrolysis and gasification of household garbage, which combine the characteristics and technical advantages of pyrolysis and gasification reaction to achieve deep dechlorination of combustible gas.
Disclosure of Invention
The utility model discloses mainly solve that prior art exists can only pass through low temperature tail gas cleanup unit desorption HCl, cause the high temperature corrosion of equipment easily, thereby restriction waste incineration electricity generation steam parameter, cause low power generation rate, and easily directly or indirectly cause the technical problem that dioxin generated etc. at flue gas cooling in-process, provide one kind and generate the direct degree of depth dechlorination of combustible gas after the combustible gas at the gasifier, avoid the combustible gas to produce high temperature corrosion to follow-up equipment, thereby improve steam parameter and improve the generating efficiency, and help reducing the domestic waste gasification processing system of the compound dechlorination of the low temperature heterogeneous catalysis synthesis of dioxin in the flue gas cooling process.
In order to solve the technical problem, the utility model discloses the purpose of the aforesaid utility model is realized, the utility model provides a domestic waste gasification processing system of compound dechlorination, including gasifier and compound dechlorination system, a serial communication port, compound dechlorination system include chlorine coarse filter and cyclone dechlorination device, chlorine coarse filter including locating the gasifier in a plurality of blocks from top to bottom set up the filter and locate the gasifier on spout the calcium mouth, filter one end with the gasifier link to each other, the filter set up to the free end downward sloping by the stiff end, the gasifier include gasification reaction layer and be used for placing chlorine coarse filter's filter layer, the filter layer locate gasification reaction layer's top, spout the calcium mouth and locate gasification reaction layer department.
As the utility model discloses an optimization of the domestic waste gasification processing system of compound dechlorination, cyclone dechlorination device include with the cyclone that the gas outlet of gasifier meets, the cyclone top be equipped with a plurality of dechlorination agent nozzle, the dechlorination agent nozzle link to each other with first dechlorination agent storehouse through first air-blower.
As the utility model discloses an optimization of the domestic waste gasification processing system of compound dechlorination, the filter including locating the left filter of gasifier and locating the gasifier right side the right filter, left filter with right filter be in the gasifier from top to bottom in proper order about the looks wrong setting form bow-shaped baffling regional, upper and lower two adjacent left filter with right filter constitute single filtration cycle, the gasifier in be equipped with a plurality of filtration cycle.
As the utility model discloses an optimization of the domestic waste gasification processing system of compound dechlorination, the filter be flat filter, the filter pass through rotating device with the gasifier rotate and connect, rotating device include with the filter axis of rotation that links to each other and rotate the motor, the rotation motor with the axis of rotation link to each other.
As an optimization of the composite dechlorination household garbage gasification treatment system of the utility model, the left filter plate and the right filter plate form an included angle of 30-70 degrees with the horizontal plane.
As the utility model discloses an optimization of the domestic waste gasification treatment system of compound dechlorination, the calcium mouth that spouts connect and spout the calcium pipe, the calcium pipe that spouts be in the gasifier in one end connect and spout the calcium shower nozzle, the calcium pipe that spouts pass through the second air-blower and link to each other with second dechlorination agent storehouse.
As an optimization of the domestic garbage gasification treatment system of the compound dechlorination of the utility model, the calcium spraying conduit is arranged in a downward sloping way.
As the utility model discloses an optimization of the domestic waste gasification processing system of compound dechlorination, left filter with the vertical orthographic projection non-intersect of right filter.
Compared with the prior art, the domestic garbage gasification treatment system with the chlorine removal function has the following beneficial effects:
1. preheating a gasification furnace, when the temperature of the gasification furnace reaches 500 ℃, introducing a gasification medium into the gasification furnace through an air distribution plate, crushing dried household garbage, and then delivering the crushed household garbage into the gasification furnace through a feeding device, so that the gasification medium and the household garbage are quickly mixed to generate a large amount of heat and are incompletely reacted to generate coarse gasification gas, the reaction temperature is controlled to 750 ℃, and important components in the coarse gasification gas are CO and CO2、H2、CH4、HCl、H 2O and solid particles, calcium is sprayed into the furnace through a calcium spraying port for dechlorination, after the calcium is sprayed and dechlorinated for the domestic garbage, because of the existence of a gasification medium, when a calcium-based dechlorinating agent meets a filter plate which is inclined downwards from a fixed end to a free end along with the continuous rising of the crude gasified gas, the solid particles and the calcium-based dechlorinating agent in the raised crude gasified gas are deposited and removed roughly, the solid particles and the calcium-based dechlorinating agent in the crude gasified gas are prevented from rising continuously, the deposited calcium-based dechlorinating agent is refluxed to a gasification reaction layer after being deposited, secondary dechlorination is formed in the furnace, the usage amount of the dechlorinating agent is reduced, the dechlorination cost is reduced, the crude gasified gas is subjected to rough filtration on the chlorine and the solid particles by a coarse filtering device of the gasification furnace and then is introduced into a cyclone separator, so that the crude gas and the calcium-based dechlorinating agent are fully mixed, composite filtration is formed, the, the power generation rate is improved, low-temperature heterogeneous synthesis of dioxin in the smoke cooling process is reduced, the content of solid particles in the crude gasified gas is reduced, impurities in the crude gasified gas are reduced after the crude gasified gas enters the cyclone separator, the crude gas is fully mixed with the calcium-based dechlorinating agent, the dechlorinating efficiency is improved, the solid particles and the calcium-based dechlorinating agent in the crude gasified gas are precipitated and removed through the chlorine crude filtering device, the precipitated and removed solid particles and the calcium-based defluorinating agent can be discharged along with gasified bottom slag, and the subsequent treatment steps of the solid particles are simplified;
2. the combination of the fine filtration of chlorine and the cyclone separator arranged outside the gasification furnace has the effects of avoiding the removal of chlorine at high intracranial temperature, thereby realizing the medium-high temperature dechlorination of the crude gasified gas (the medium-high temperature dechlorination technology is a technology for finally realizing the separation and removal of pollutants containing chlorine in the flue gas by using a solid phase dechlorinating agent to absorb HCl gas in the crude gasified gas at the temperature of more than 500 ℃), avoiding the reduction of the dechlorination effect of the device caused by overhigh temperature in the gasification furnace, and improving the filtration efficiency of the fine chlorine filtration device;
3. the dechlorinating agent in the first dechlorinating agent bin is sent into the cyclone separator through the first blower, and the dechlorinating agent can be rapidly dispersed under the action of the vortex to be in contact with hydrogen sulfide in the flue gas and generate chemical reaction due to the high-speed vortex generated by the coarse gasified gas in the cyclone separator, so that the chlorine is removed;
4. the filter plates comprise a left filter plate arranged on the left side of the gasification furnace and a right filter plate arranged on the right side of the gasification furnace, the left filter plate and the right filter plate are sequentially arranged in a left-right staggered mode from top to bottom in the gasification furnace to form an arched deflection area, the upper left filter plate and the lower right filter plate which are adjacent form a single filtering period, and the gasification furnace is internally provided with a plurality of filtering periods which have the function of enabling the coarse gasification gas to form an arched deflection in the filtering layer, so that the efficiency of precipitating and removing solid particles of the coarse gasification gas is enhanced;
5. the filter plate is rotationally connected with the gasification furnace through a rotating device, the rotating device comprises a rotating shaft and a rotating motor, the rotating motor is connected with the filter plate, and the rotating motor and the rotating shaft are connected to realize the removal of impurities accumulated on the filter plate through the rotation of the rotating device at regular intervals;
6. spraying the dechlorinating agent in the second dechlorinating agent bin into the gasification furnace through a calcium spraying guide pipe by using a second air blower, so as to form dechlorination reaction on the household garbage in the gasification furnace;
7. the calcium spraying guide pipe is arranged downwards and has the function that the dechlorinating agent can be effectively sprayed on the garbage, so that the chlorine content in the coarse gasification gas is further reduced;
8. the effect that the longitudinal orthographic projection of the left filter plate and the longitudinal orthographic projection of the right filter plate are not intersected is to avoid that coarse gasified gas is locally blocked between the left filter plate and the right filter plate so as to influence the filtering effect.
Therefore, the utility model has the characteristics of rational in infrastructure, energy-efficient etc.
Drawings
FIG. 1 is a schematic flow diagram of the crude gasification gas of the present invention;
FIG. 2 is a schematic structural view of the utility model when removing impurities;
FIG. 3 is a front view of the dechlorination agent nozzle of the present invention.
Description of part numbers in the figures: 1. the device comprises a gasification furnace, 2. a calcium spraying port, 3. a fixed end, 4. a free end, 5. a gasification reaction layer, 6. a filter layer, 7. a cyclone separator, 8. a dechlorinating agent nozzle, 9. a left filter plate, 10. a right filter plate, 11. a rotating shaft, 12. a calcium spraying conduit and 13. a calcium spraying nozzle.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example 1:
the compound dechlorination household garbage gasification treatment system shown in figure 1 comprises a gasification furnace 1 and a compound dechlorination system, and is characterized in that the compound dechlorination system comprises a chlorine coarse filtering device and a cyclone separator 7 dechlorination device, the chlorine coarse filtering device comprises a plurality of filter plates arranged from top to bottom in the gasification furnace 1 and a calcium spraying port 2 arranged on the gasification furnace 1, one end of each filter plate is connected with the gasification furnace 1, each filter plate is downwards inclined from a fixed end 3 to a free end 4, the gasification furnace 1 comprises a gasification reaction layer 5 and a filter layer 6 used for placing the chlorine coarse filtering device, the filter layer 6 is arranged at the top of the gasification reaction layer 5, and the calcium spraying port 2 is arranged at the gasification reaction layer 5.
Preheating a gasification furnace 1, when the temperature of the gasification furnace 1 reaches 500 ℃, a gasification medium firstly enters the gasification furnace 1 through an air distribution plate, then crushing dried household garbage and then sending the crushed household garbage into the gasification furnace 1 through a feeding device, so that the gasification medium and the household garbage are quickly mixed to generate a large amount of heat and are incompletely reacted to generate coarse gasification gas, the reaction temperature is controlled to be 750 ℃, and important components in the coarse gasification gas are CO and CO2、H2、CH4、HCl、H 2O and solid particles, calcium is sprayed into the furnace for dechlorination through a calcium spraying port 2, after the calcium is sprayed and dechlorinated for the domestic garbage, because of the existence of a gasification medium, when a calcium-based dechlorinating agent meets a filter plate which is inclined downwards from a fixed end 3 to a free end 4 along with the continuous rising of the crude gasified gas, the raised fixed particles of the crude gasified gas and the calcium-based dechlorinating agent are deposited and removed roughly, the solid particles and the calcium-based dechlorinating agent in the crude gasified gas are prevented from rising continuously, the deposited calcium-based dechlorinating agent flows back to a gasification reaction layer 5 after being deposited to form secondary dechlorination in the furnace, the use amount of the dechlorinating agent is reduced, the dechlorination cost is reduced, the crude gas passes through a coarse filtering device of a gasification furnace 1 to perform coarse filtering on the chlorine and the solid particles and then is introduced into a cyclone separator 7, so that the crude gas and the calcium-based dechlorinating agent are fully, The device has the advantages that high-temperature corrosion of combustible gas to subsequent equipment is avoided, the power generation rate is improved, low-temperature heterogeneous synthesis of dioxin in the smoke cooling process is reduced, the content of solid particles in the coarse gasified gas is reduced, impurities are reduced after the coarse gasified gas enters the cyclone separator 7, the coarse gasified gas is fully mixed with the calcium-based dechlorinating agent, the dechlorinating efficiency is improved, the solid particles and the calcium-based dechlorinating agent in the coarse gasified gas are precipitated and removed through the chlorine coarse filtering device, the solid particles and the calcium-based defluorinating agent can be discharged together with gasified bottom slag after precipitation and removal, and subsequent treatment steps for the solid particles are simplified.
Example 2:
as shown in fig. 1 and 3, the present embodiment differs from embodiment 1 in that: the dechlorination device of the cyclone separator 7 comprises a cyclone separator 7 connected with the air outlet of the gasification furnace 1, a plurality of dechlorination agent nozzles 8 are arranged at the top of the cyclone separator 7, and the dechlorination agent nozzles 8 are connected with the first dechlorination agent bin through a first air blower.
Compared with the embodiment 1, the embodiment further defines the dechlorination device of the cyclone separator 7, the fine filtration of chlorine is combined with the cyclone separator 7 arranged outside the gasification furnace 1 to avoid intracranial high temperature to remove chlorine, so as to realize medium-high temperature dechlorination of the crude gasified gas (the medium-high temperature dechlorination technology is a technology of absorbing HCl gas in the crude gasified gas by using a solid-phase dechlorinating agent at a temperature of more than 500 ℃ to finally realize separation and removal of chlorine-containing pollutants in the flue gas), the reduction of the dechlorination effect of the device caused by overhigh temperature in the gasification furnace 1 is avoided to improve the filtration efficiency of the fine chlorine filtration device, the dechlorinating agent in the first dechlorinating agent bin is sent into the cyclone separator 7 by a first blower, and the dechlorinating agent can be rapidly diffused to contact with hydrogen sulfide in the flue gas and generate chemical reaction under the action of vortex because the crude gasified gas in the cyclone separator 7 generates high-speed vortex, thereby removing chlorine.
Example 3:
as shown in fig. 1 to 2, the present embodiment is different from embodiment 1 in that: the filter including locating 1 left filter 9 of gasifier and locating 1 right side of gasifier right filter 10, left filter 9 with right filter 10 be in gasifier 1 in from top to bottom in proper order about the setting in a staggered way form bow-shaped baffling region, upper and lower two adjacent left filter 9 with right filter 10 constitute single filtration cycle, gasifier 1 in be equipped with a plurality of filtration cycle.
For embodiment 1, this embodiment has made further injectd to the filter, the filter is including locating 1 left filter 9 of gasifier and locating 1 right side of gasifier right filter 10, left side filter 9 and right filter 10 from top to bottom in gasifier 1 from top to bottom in proper order about the setting of staggering form bow-shaped baffling region, upper and lower two adjacent left filter 9 and right filter 10 constitute single filtration cycle, the effect that is equipped with a plurality of filtration cycle in gasifier 1 makes the coarse gasification gas form bow-shaped baffling in filter layer 6, thereby the reinforcing is to the efficiency of the solid particle precipitation desorption of coarse gasification gas.
Example 4:
as shown in fig. 1 to 2, the present embodiment is different from embodiment 1 in that: the filter be flat filter, the filter pass through rotating device with gasifier 1 rotate and be connected, rotating device include with the filter continuous axis of rotation 11 and rotation motor, rotation motor with axis of rotation 11 link to each other.
For embodiment 1, this embodiment has made further injectd to the filter, and the filter passes through rotating device to be connected with 1 rotations of gasifier, and rotating device includes axis of rotation 11 and the rotation motor that links to each other with the filter, thereby the effect that the rotation motor links to each other with axis of rotation 11 is the rotation that regularly passes through rotating device and realizes getting rid of the impurity that falls of deposit on the filter.
Example 5:
as shown in fig. 1 to 2, the present embodiment is different from embodiment 1 in that: the left filter plate 9 and the right filter plate 10 form an included angle of 30-70 degrees with the horizontal plane.
This embodiment is further defined with respect to the left filter plate 9 and the right filter plate 10 with respect to embodiment 1.
Example 6:
as shown in fig. 1 to 2, the present embodiment is different from embodiment 1 in that: the calcium spraying port 2 is connected with a calcium spraying guide pipe 12, one end of the calcium spraying guide pipe 12 in the gasification furnace 1 is connected with a calcium spraying nozzle 13, and the calcium spraying guide pipe 12 is connected with a second dechlorinating agent bin through a second air blower.
Compared with the embodiment 1, the embodiment has further defined the calcium spraying opening 2, the dechlorination reaction is formed on the household garbage in the gasification furnace 1 by spraying the dechlorination agent in the second dechlorination agent bin into the gasification furnace 1 through the calcium spraying conduit 12 by the second blower.
Example 7:
as shown in fig. 1 to 2, the present embodiment is different from embodiment 1 in that: the calcium spraying guide pipe 12 is arranged downwards.
The present embodiment is further defined in relation to the embodiment 1 in that the calcium spraying guide 12 is inclined downward so that the dechlorinating agent can be effectively sprayed on the garbage, and the chlorine content in the coarse gasification gas is further reduced.
Example 8:
as shown in fig. 1 to 2, the present embodiment is different from embodiment 1 in that: the left filter plate 9 and the right filter plate 10 do not intersect in vertical orthographic projection.
Compared with the embodiment 1, the calcium spraying conduit 12 is further limited in the embodiment, and the effect that the longitudinal orthographic projection of the left filter plate 9 and the longitudinal orthographic projection of the right filter plate 10 are not intersected is to avoid local congestion of coarse gasification gas between the left filter plate 9 and the right filter plate 10, so that the filtering effect is influenced.
Claims (8)
1. The utility model provides a domestic waste gasification processing system of compound dechlorination, includes gasifier and compound dechlorination system, its characterized in that, compound dechlorination system include chlorine coarse filtration device and cyclone dechlorination device, chlorine coarse filtration device including locate a plurality of filters that from top to bottom set up in the gasifier and locate the gasifier on spout calcium mouth, filter one end with the gasifier link to each other, the filter set by stiff end to free end downward sloping setting, the gasifier include gasification reaction layer and be used for placing the filter layer of chlorine coarse filtration device, the filter layer locate the top of gasification reaction layer, spout calcium mouth locate gasification reaction layer department.
2. The gasification treatment system for compound dechlorination household garbage according to claim 1, wherein the dechlorination device of the cyclone separator comprises a cyclone separator connected with the air outlet of the gasification furnace, a plurality of dechlorination agent nozzles are arranged at the top of the cyclone separator, and the dechlorination agent nozzles are connected with the first dechlorination agent bin through a first air blower.
3. The gasification treatment system for composite dechlorination household garbage according to claim 1 or 2, wherein the filter plates comprise a left filter plate arranged on the left side of the gasification furnace and a right filter plate arranged on the right side of the gasification furnace, the left filter plate and the right filter plate are sequentially arranged in a left-right staggered manner in the gasification furnace from top to bottom to form an arch-shaped baffling region, the upper left filter plate and the lower right filter plate are adjacent to each other to form a single filtering period, and the gasification furnace is internally provided with a plurality of filtering periods.
4. The gasification system for dechlorinated compound household garbage according to claim 1 or 2, wherein the filter plate is a flat plate filter plate, the filter plate is rotatably connected to the gasification furnace through a rotating device, the rotating device comprises a rotating shaft and a rotating motor, the rotating shaft is connected to the filter plate, and the rotating motor is connected to the rotating shaft.
5. The gasification treatment system for dechlorinated compound household garbage according to claim 3, wherein the angle between the left filter plate and the right filter plate is 30-70 ° with respect to the horizontal plane.
6. The gasification treatment system for compound dechlorination household garbage according to claim 1, 2 or 5, wherein the calcium spraying port is connected with a calcium spraying conduit, one end of the calcium spraying conduit in the gasification furnace is connected with a calcium spraying nozzle, and the calcium spraying conduit is connected with the second dechlorinating agent bin through a second blower.
7. The complex dechlorinated domestic garbage gasification processing system of claim 6, wherein the calcium injection conduit is tilted downward.
8. The complex dechlorinated domestic garbage gasification processing system of claim 3, wherein the vertical orthographic projection of said left filter plate and said right filter plate do not intersect.
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| CN202020028568.5U CN212051260U (en) | 2020-01-06 | 2020-01-06 | Compound dechlorination household garbage gasification treatment system |
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| CN111088081A (en) * | 2020-01-06 | 2020-05-01 | 浙江科技学院 | Compound dechlorination household garbage gasification treatment system |
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| CN111088081A (en) * | 2020-01-06 | 2020-05-01 | 浙江科技学院 | Compound dechlorination household garbage gasification treatment system |
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