CN219550529U - Garbage pyrolysis gasification and leachate treatment and utilization system - Google Patents
Garbage pyrolysis gasification and leachate treatment and utilization system Download PDFInfo
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- CN219550529U CN219550529U CN202320780358.5U CN202320780358U CN219550529U CN 219550529 U CN219550529 U CN 219550529U CN 202320780358 U CN202320780358 U CN 202320780358U CN 219550529 U CN219550529 U CN 219550529U
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Abstract
The utility model belongs to the technical field of sewage treatment in garbage treatment engineering, and discloses a garbage pyrolysis gasification and percolate treatment utilization system which comprises a garbage slag discharging device, alkali liquor preparation equipment, a garbage storage workshop, a garbage feeding device, a garbage pyrolysis gasification furnace, a secondary combustion chamber, a waste heat boiler, a deacidification tower and an air preheater which are sequentially connected, wherein the garbage storage workshop is sequentially connected with a percolate collecting system, a percolate treatment system and a purified percolate storage pool, the purified percolate storage pool is respectively connected with the garbage slag discharging device and the alkali liquor preparation equipment, and heat exchange pipelines are arranged among the garbage storage workshop, the air preheater and the garbage feeding device. The utility model can effectively treat solid garbage and garbage percolate in garbage, reduce the harm of the garbage percolate to the environment, realize the recycling of the percolate, reduce the consumption of fresh process water and improve the self-stability of independent operation of projects.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment in garbage treatment engineering, and particularly relates to a garbage pyrolysis gasification and leachate treatment and utilization system.
Background
The pyrolysis gasification process technology has the advantages of flexible treatment scale, low emission concentration of smoke pollutants, good effect of harmless treatment of garbage reduction and the like in the treatment of organic garbage such as suburban, regional/county and rural/town household garbage, municipal sludge, kitchen garbage and the like, and is widely popularized and applied.
In the middle and small-scale garbage treatment projects, the garbage treatment capacity is usually between 30t/d and 200t/d, project site selection is usually far away from residents and industrial areas, and part of project site selection construction in the areas with strict environmental protection requirements cannot obtain new sewage outlets, so that the standard treatment of waste residues, waste liquids and waste gases is realized, and the problem of the current popularization of the middle and small-scale household garbage pyrolysis gasification technology is solved.
In the prior art, china patent application (application number: CN 201710818090.9) discloses a pyrolysis gasification garbage treatment system and a garbage treatment system, wherein the pyrolysis gasification garbage treatment system comprises a garbage drying room, at least two pyrolysis furnaces, a secondary combustion chamber and a heat exchanger, the garbage is subjected to drying treatment by the garbage drying room, but under the normal condition, the garbage water content is higher, garbage percolate is high-concentration organic wastewater with complex components, and serious environmental pollution can be caused if the garbage percolate is directly discharged into the environment without treatment, so that the garbage percolate is treated essentially, and the system does not consider the treatment mode of the garbage percolate.
Disclosure of Invention
The utility model aims to provide a garbage pyrolysis gasification and leachate treatment and utilization system, which can realize the advanced treatment and self-recycling of garbage and garbage leachate and reduce the harm of garbage to the environment.
The technical scheme adopted by the utility model is that the garbage pyrolysis gasification and percolate treatment and utilization system comprises a garbage slag discharging device, alkali liquor preparation equipment, a garbage storage workshop, a garbage feeding device, a garbage pyrolysis gasification furnace, a secondary combustion chamber, a waste heat boiler, a deacidification tower and an air preheater which are connected in sequence; the waste slag discharging device is connected with a solid outlet of the waste pyrolysis gasification furnace, the alkali liquor preparation equipment is connected with the deacidification tower through an alkali liquor pool, and a pipeline loop is arranged between the alkali liquor pool and the deacidification tower;
the garbage storage workshop is sequentially connected with a percolate collecting system, a percolate treatment system and a purified percolate storage pool, and the purified percolate storage pool is respectively connected with the garbage slag discharging device and the alkali liquid preparation equipment;
and heat exchange pipelines are arranged between the garbage storage workshop, the air preheater and the garbage feeding device.
Preferably, the garbage feeding device comprises a garbage feeding hole, an engagement roller and an engagement roller shaft; the meshing rollers are positioned below the garbage feeding hole and are arranged in pairs to rotate in opposite directions; the meshing roller and the meshing roller shaft are hollow, one end of the meshing roller shaft is communicated with the meshing roller, and the other end of the meshing roller shaft is communicated with a heating air inlet of the meshing roller.
Preferably, the bottom side wall of the garbage feeding device is provided with a hot air distribution opening.
Preferably, the engagement roller heating air inlet and the hot air distribution opening are both communicated with the heat exchange pipeline.
Preferably, the deacidification tower comprises a deacidification tower body, a high-temperature flue gas inlet, an alkali liquor reflux port, a deacidification flue gas outlet, an alkali liquor distribution pipeline and an alkali liquor atomization spraying device; the high-temperature flue gas inlet is arranged at the lower end of the deacidification tower body, the alkali liquor reflux port is arranged at the bottom of the deacidification tower body, and the deacidification flue gas outlet is arranged at the top of the deacidification tower body; the alkali liquor distribution pipeline is arranged in the deacidification tower body; the alkali liquor atomizing spray devices are arranged on the alkali liquor distribution pipelines, and a plurality of alkali liquor atomizing spray devices are arranged on each alkali liquor distribution pipeline at intervals.
Preferably, the alkali liquor distribution pipeline is provided with a plurality of alkali liquor distribution pipelines which are horizontally arranged.
Preferably, an induced draft fan is arranged on a heat exchange pipeline between the air preheater and the garbage storage workshop, and a blower is arranged on the heat exchange pipeline between the air preheater and the garbage feeding device.
Preferably, the water softener further comprises a water softener, a softened water outlet of the water softener is connected with the waste heat boiler, and a high-salt water outlet of the water softener is connected with the garbage slag discharging device.
Preferably, the device further comprises a flue gas dust removal and purification device, and the flue gas dust removal and purification device is respectively connected with the purification percolate storage tank and the air preheater.
The utility model has the beneficial effects that:
(1) The utility model can effectively treat the solid garbage and the garbage percolate in the garbage, and reduce the harm of the garbage percolate to the environment;
(2) The purifying percolate storage tank is respectively connected with alkali liquor preparation equipment, a garbage deslagging device and a flue gas dust removal purifying device, so that the cyclic utilization of percolate is realized, and the consumption of fresh process water is reduced;
(3) The production sewage is not discharged, the sewage discharge treatment cost is reduced, the dependence of projects on external sewage treatment facilities is thoroughly avoided, and the self-stability of independent operation of the projects is improved;
(4) The heat exchange pipeline is arranged between the garbage storage workshop, the air preheater and the garbage feeding device, so that heat energy generated by garbage treatment can be used for garbage drying pretreatment, and the energy utilization rate of the system is improved.
Drawings
FIG. 1 is a flow chart of the garbage pyrolysis gasification and percolate treatment and utilization system.
Fig. 2 is a schematic view of a refuse feeding apparatus.
Fig. 3 is a schematic diagram of the structure of the deacidification tower.
In the figure: 1-a garbage storage workshop;
2-a garbage feeding device; 201-a garbage feed port; 202-engaging a roller; 203-engaging a roller shaft; 204-engagement roller heating air inlet; 205-hot air distribution openings;
3-a garbage pyrolysis gasifier; 4-a secondary combustion chamber; 5-an exhaust-heat boiler;
6-deacidifying tower; 601-deacidifying tower body; 602-high-temperature flue gas inlet; 603-alkali liquor reflux port; 604-an alkali liquor distribution pipeline; 605-alkali liquor atomizing and spraying device; 606-deacidifying a flue gas outlet;
7-an air preheater; 8-a flue gas dust removal and purification device; 9-a water softener; 10-a percolate collection system; 11-a percolate treatment system; 12-purifying a percolate storage tank; 13-alkali liquor preparation equipment; 14-an alkali liquid pool; 15-a garbage deslagging device.
Detailed Description
The following is a further detailed description of the embodiments:
the garbage pyrolysis gasification and percolate treatment and utilization system is shown in fig. 1, and comprises a garbage storage workshop 1, a garbage feeding device 2, a garbage pyrolysis gasification furnace 3, a secondary combustion chamber 4, a waste heat boiler 5, a deacidification tower 6, an air preheater 7, a flue gas dust removal purification device 8, a soft water device 9, a percolate collection system 10, a percolate collection system 11, a purified percolate storage tank 12, an alkali liquor preparation device 13, an alkali liquor pool 14 and a garbage slag discharging device 15. The garbage feeding device 2, the garbage pyrolysis gasification furnace 3, the secondary combustion chamber 4, the waste heat boiler 5, the deacidification tower 6 and the air preheater 7 are connected in sequence; the garbage slag discharging device 15 is connected with a solid outlet of the garbage pyrolysis gasification furnace 3, the alkali liquor preparation equipment 13 is connected with the deacidification tower 6 through an alkali liquor pool 14, and a pipeline loop is arranged between the alkali liquor pool 14 and the deacidification tower 6; the bottom of the garbage storage workshop 1 is sequentially connected with a percolate collecting system 10, a percolate treatment system 11 and a purified percolate storage tank 12, and the purified percolate storage tank 13 is respectively connected with a garbage slag discharging device 15 and an alkali liquid preparation device 13; heat exchange pipelines are arranged among the garbage storage workshop 1, the air preheater 7 and the garbage feeding device 2.
Organic garbage in the garbage storage workshop 1 comprises kitchen garbage solid slag, sludge dewatering solid slag, household garbage and the like, the household garbage is discharged to the garbage storage workshop 1 through a garbage truck, and the kitchen garbage solid slag and the sludge dewatering solid slag are conveyed to the garbage storage workshop 1 through a conveying belt.
The bottom of the garbage storage workshop 1 is communicated with the percolate collecting system 11, a grabbing hopper is arranged at the top of the garbage storage workshop 1, organic garbage is grabbed into the garbage feeding device 2 by the grabbing hopper, the upper end of the garbage feeding device 2 is located in the garbage storage workshop 1, and as shown in fig. 2, the garbage feeding device 2 comprises a garbage feeding hole 201, an engagement roller 202, an engagement roller shaft 203, an engagement roller heating air inlet 204 and a hot air distribution hole 205. The garbage feeding hole 201 is wide in upper portion and narrow in lower portion, a hollow garbage feeding bin is connected to the bottom of the garbage feeding hole 201, the meshing roller 202 and the meshing roller shaft 203 are arranged in the garbage feeding bin, and the meshing roller shaft 203 penetrates through the center of the meshing roller 202 and is connected with an output shaft of an external motor. The engaging rollers 202 are arranged in pairs and rotate in opposite directions, and in this embodiment, two engaging rollers 202 are provided. The meshing roller 202 and the meshing roller shaft 203 are of hollow structures, one end of the meshing roller shaft 203 is communicated with a meshing roller heating air inlet 204, the other end of the meshing roller shaft 203 is communicated with the inside of the meshing roller 202, a hot air distribution port 205 is formed in the side wall of the bottom of the garbage feeding bin, hot air subjected to heat exchange with flue gas is shunted to the garbage feeding bin, a part of hot air enters the meshing roller shaft 203 through the meshing roller heating air inlet 204 to store heat and is discharged into the garbage feeding bin, the temperature of the meshing roller 202 is kept between 120 and 130 ℃, and in the feeding process, primary heating of garbage is completed through heat conduction, radiation and the like of the garbage; the rest part of hot air enters the bottom of the garbage feeding bin from the hot air distribution port 205 of the feeding bin, and the garbage before entering the furnace is further heated and dried. The meshing roller heating air inlet 204 and the hot air distribution opening 205 are both communicated with a heat exchange pipeline, and a flow regulating valve A and a flow regulating valve B are respectively arranged between the heat exchange pipeline and the meshing roller heating air inlet 204 and between the heat exchange pipeline and the hot air distribution opening 205 and are used for regulating the flow rate of hot air entering the meshing roller heating air inlet 204 and the hot air distribution opening 205.
The garbage pyrolysis gasification furnace 3 is connected to the bottom of the garbage feeding device 2, and the garbage pyrolysis gasification furnace 3 is used for carrying out pyrolysis gasification treatment on garbage and generating pyrolysis gas and slag after pyrolysis. The bottom of the garbage pyrolysis gasification furnace 3 is provided with a slag outlet, a garbage slag discharging device 15 is arranged below the slag outlet, and the upper end of the garbage pyrolysis gasification furnace 3 is connected with the secondary combustion chamber 4 through a pipeline. The pyrolysis gas enters the secondary combustion chamber 4 through a pipeline and is combusted, slag enters the garbage slag discharging device 15, and is cooled and collected in the garbage slag discharging device 15 and then is transported outwards. The secondary combustion chamber 4 is connected with the waste heat boiler 5 through a pipeline, a high-temperature flue gas outlet and a high-temperature steam outlet are arranged on the waste heat boiler 5, and the high-temperature steam generated after heat exchange of the waste heat boiler 5 can be used in factories or supplied externally.
And a water softener 9 for softening water. The softened water outlet of the water softening device 9 is connected with the waste heat boiler 5, the high-salt water outlet of the water softening device 9 is connected with the garbage slag discharging device 15, the high-salt water is used for cooling slag and discharging slag, and the consumption of fresh process water is reduced. In operation, water softened by the water softener 9 is used as boiler feed water, and high-salt water generated by softening the boiler feed water is discharged to the garbage slag discharging device 15.
And the alkali liquid pool 14 is connected with the alkali liquid preparation equipment 13 and is used for storing alkali liquid, and a water source adopted by the alkali liquid preparation equipment 13 is purified sewage in the purified sewage storage pool.
The deacidification tower 6, as shown in figure 3, comprises a deacidification tower body 601, a high-temperature flue gas inlet 602, an alkali liquor reflux port 603, an alkali liquor distribution pipeline 604, an alkali liquor atomization spray device 605 and a deacidification flue gas outlet 606. The high temperature flue gas entry 602 sets up in deacidification tower body 601 lower extreme, and alkali lye reflux mouth 603 sets up in deacidification tower body 601 bottom, and deacidification flue gas outlet 606 sets up at deacidification tower body 601 top, and alkali lye delivery pipeline 604 is provided with a plurality of, and the level is arranged in deacidification tower body 601, and alkali lye atomizing spray set 605 sets up on alkali lye delivery pipeline 604, and the interval is provided with a plurality of alkali lye atomizing spray set 605 on every alkali lye delivery pipeline 604. A pipeline loop is arranged between the alkali liquid pool 14 and the deacidification tower 6. During operation, high-temperature flue gas is led in from the high-temperature flue gas inlet 602, alkali liquor prepared in the alkali liquor pond 14 is conveyed into the deacidification tower 6 through the alkali liquor delivery pipeline 604, then is deacidified and cooled after being atomized through the alkali liquor atomization spraying device 605, the alkali liquor is sprayed from top to bottom after being atomized and fully contacts with the high-temperature flue gas, and the sprayed alkali liquor flows back to the alkali liquor pond through the alkali liquor return port 603 and is recycled through a pipeline.
In some possible embodiments, the garbage pyrolysis gasification and percolate treatment system of the utility model further comprises a flue gas dust removal purification device 8. And the flue gas dust removal and purification device is respectively connected with the purification percolate storage tank and the air preheater.
The inlet end of the air preheater 7 is connected with the deacidification tower 6 through a pipeline, and the outlet end is connected with the flue gas dust removal and purification device 8 through a pipeline. The cold air of the air preheater 7 comes from the garbage storage workshop 1, the hot air of the air preheater 7 comes from the flue gas after deacidification and cooling in the deacidification tower 6, and the flue gas is further subjected to heat exchange and cooling in the air preheater 7 and then is sent to the flue gas dust removal and purification device 8, and is discharged after reaching the treatment standard. The garbage storage workshop 1, the air preheater 7 and the garbage feeding device 2 are provided with heat exchange pipelines, a blower and an induced draft fan are arranged on the heat exchange pipelines, specifically, the induced draft fan is arranged on the heat exchange pipeline between the air preheater and the garbage storage workshop, the blower is arranged on the heat exchange pipeline between the air preheater and the garbage feeding device, the induced draft fan is used for sending cold air in the garbage storage workshop 1 into the air preheater 7, the blower is used for sending hot air after heat exchange to the garbage feeding device 2, the temperature of the hot air after heat exchange is 135-150 ℃, after the hot air is split, one air is led to the bottom of the garbage feeding device 2, blows from bottom to top and contacts with garbage to heat and dry the garbage, one air is led to the garbage feeding device 2 to heat the engaging roller 202, the engaging roller 202 is used as a heat accumulator to heat the garbage crushed by the engaging roller 202, and the temperature of the engaging roller 202 is raised to 120-130 ℃ after the hot air is heated.
The working process of the utility model is as follows: after the garbage is mixed, stored and discharged and percolated, the garbage is grabbed and enters a garbage feeding device 2, the garbage is crushed, preheated and dried and then enters a garbage pyrolysis gasification furnace 3, combustible gas generated by pyrolysis of the pyrolysis gasification furnace 3 enters a secondary combustion chamber 4 for combustion, generated high-temperature flue gas enters a waste heat boiler 5, the flue gas after heat exchange enters a deacidification tower 6 for deacidification, the flue gas after deacidification and temperature reduction enters an air preheater 7 for heat exchange with air from a garbage storage room 1, heat enters the garbage feeding device 2 through a heat exchange pipeline for drying the garbage, and the flue gas after heat exchange enters a flue gas dust removal purification device 8 for treatment and emission after reaching standards; the percolate generated in the garbage storage workshop 1 is collected by a percolate collecting system 10 and then is sent to a percolate treatment system 11, and the purified percolate generated after treatment enters a purified percolate storage tank 12 and is used as water for an alkali liquor preparation device 13, a garbage slag discharging device 15 and a flue gas dust removal purification device 7.
Claims (9)
1. The garbage pyrolysis gasification and percolate treatment and utilization system is characterized by comprising a garbage slag discharging device, alkali liquor preparation equipment, a garbage storage workshop, a garbage feeding device, a garbage pyrolysis gasification furnace, a secondary combustion chamber, a waste heat boiler, a deacidification tower and an air preheater which are connected in sequence; the waste slag discharging device is connected with a solid outlet of the waste pyrolysis gasification furnace, the alkali liquor preparation equipment is connected with the deacidification tower through an alkali liquor pool, and a pipeline loop is arranged between the alkali liquor pool and the deacidification tower;
the garbage storage workshop is sequentially connected with a percolate collecting system, a percolate treatment system and a purified percolate storage pool, and the purified percolate storage pool is respectively connected with the garbage slag discharging device and the alkali liquid preparation equipment;
and heat exchange pipelines are arranged between the garbage storage workshop, the air preheater and the garbage feeding device.
2. The system for pyrolysis gasification and percolate treatment and utilization of garbage according to claim 1, wherein the garbage feeding device comprises a garbage feeding port, a meshing roller and a meshing roller shaft; the meshing rollers are positioned below the garbage feeding hole and are arranged in pairs to rotate in opposite directions; the meshing roller and the meshing roller shaft are hollow, one end of the meshing roller shaft is communicated with the meshing roller, and the other end of the meshing roller shaft is communicated with a heating air inlet of the meshing roller.
3. The system for pyrolysis gasification and percolate treatment and utilization of garbage according to claim 2, wherein a hot air distribution port is provided on a bottom side wall of the garbage feeding device.
4. The system of claim 3, wherein the heated air inlet of the engagement roller and the heated air distribution port are in communication with the heat exchange conduit.
5. The system for treating and utilizing the pyrolysis gasification and percolate of the garbage according to claim 1, wherein the deacidification tower comprises a deacidification tower body, a high-temperature flue gas inlet, an alkali liquor reflux port, a deacidification flue gas outlet, an alkali liquor distribution pipeline and an alkali liquor atomization spraying device; the high-temperature flue gas inlet is arranged at the lower end of the deacidification tower body, the alkali liquor reflux port is arranged at the bottom of the deacidification tower body, and the deacidification flue gas outlet is arranged at the top of the deacidification tower body; the alkali liquor distribution pipeline is arranged in the deacidification tower body; the alkali liquor atomizing spray devices are arranged on the alkali liquor distribution pipelines, and a plurality of alkali liquor atomizing spray devices are arranged on each alkali liquor distribution pipeline at intervals.
6. The system for pyrolysis gasification and percolate treatment and utilization of garbage according to claim 5, wherein the alkali liquor distribution pipeline is provided with a plurality of alkali liquor distribution pipelines which are horizontally arranged.
7. The system for pyrolysis gasification and percolate treatment and utilization of garbage according to claim 1, wherein an induced draft fan is arranged on a heat exchange pipeline between the air preheater and the garbage storage workshop, and a blower is arranged on the heat exchange pipeline between the air preheater and the garbage feeding device.
8. The system for pyrolysis gasification and leachate treatment and utilization of garbage as claimed in claim 1, further comprising a water softening device, wherein a softened water outlet of the water softening device is connected with the waste heat boiler, and a high-salt water outlet of the water softening device is connected with the garbage slag discharging device.
9. The system for pyrolysis gasification and leachate treatment and utilization of waste according to any one of claims 1 to 8, further comprising a flue gas dust removal and purification device, wherein the flue gas dust removal and purification device is respectively connected with the purified leachate storage tank and the air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320780358.5U CN219550529U (en) | 2023-04-11 | 2023-04-11 | Garbage pyrolysis gasification and leachate treatment and utilization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320780358.5U CN219550529U (en) | 2023-04-11 | 2023-04-11 | Garbage pyrolysis gasification and leachate treatment and utilization system |
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| CN219550529U true CN219550529U (en) | 2023-08-18 |
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| CN202320780358.5U Active CN219550529U (en) | 2023-04-11 | 2023-04-11 | Garbage pyrolysis gasification and leachate treatment and utilization system |
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| CN (1) | CN219550529U (en) |
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- 2023-04-11 CN CN202320780358.5U patent/CN219550529U/en active Active
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