CN217127219U - Household garbage treatment system - Google Patents
Household garbage treatment system Download PDFInfo
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- CN217127219U CN217127219U CN202221191185.5U CN202221191185U CN217127219U CN 217127219 U CN217127219 U CN 217127219U CN 202221191185 U CN202221191185 U CN 202221191185U CN 217127219 U CN217127219 U CN 217127219U
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model relates to a utilization technical field especially relates to a domestic waste's processing system, include: a garbage bin; the leachate treatment device is connected with a leachate outlet of the garbage bin; the incinerator is connected with a garbage outlet of the garbage bin; a fly ash washing tank connected with a fly ash outlet of the incinerator; a concentrated solution inlet of the fly ash washing tank is connected with a first concentrated solution outlet of the leachate treatment device; the dissolution leaching tank is connected with a fly ash thick slurry outlet of the fly ash washing tank; a pH conditioning tank connected with the leachate outlet of the dissolution leaching tank; a biogas washing tower connected with the conditioning liquid outlet of the pH conditioning tank; a biogas inlet of the biogas washing tower is connected with a biogas outlet of the leachate treatment device; and the sedimentation filter tank is connected with a washing liquid outlet of the methane washing tower. The application provides a processing system can coprocessing fly ash, landfill leachate and marsh gas, can realize the purpose that dangerous useless decrement, useless alkali recycle, marsh gas purify and detach the heavy metal in the leachate.
Description
Technical Field
The utility model relates to a utilization technical field especially relates to a domestic waste's processing system.
Background
The treatment technology of incineration fly ash obtained by incinerating domestic garbage comprises the following steps:
1) ash fusion method:
fly ash fusion is an endothermic process using a high temperature fly ash furnace, including dry dehydration, polycrystallization (occurring at 500 ℃) and melt phase transition (occurring at 1130 ℃). Finally melting the fly ash into a vitreous body, and then cooling and burying the vitreous body.
2) The fly ash solidification method comprises the following steps:
the solidification method is a process of containing the fly ash in an inert material, namely a solidifying agent, by utilizing a physical and chemical method to stabilize the fly ash. The currently accepted solidification mechanism is the chemical process in which the fly ash is stabilized in the crystal lattice of the solidification agent and the physical process in which the solidification agent directly contains the fly ash. The curing agent used is cement, lime or thermoplastic asphalt, etc. with similar properties.
3) Medicament treatment method:
the chemical treatment method is to add a proper amount of a stabilizer such as heavy metal trapping, coagulating, inhibiting, etc. to fly ash, and to mix it with water sufficiently to form an insoluble compound.
4) Acid precipitation treatment method:
the acid precipitation treatment method is to add hydrochloric acid or sulfuric acid into the flue gas, dissolve the flue gas in an aqueous solution, realize heavy metal precipitation towards the solution direction, and then add a medicament to generate insoluble substances such as hydroxide or sulfide. Compared with cement solidification and chemical solidification, the method has the characteristics of complex device, good fly ash stability, salt precipitation and recovery.
5) The fly ash sintering method comprises the following steps:
the sintering and fixing method is to adopt the technology of sintering and refining raw materials in the steel industry, and according to the principle, clay and a little coal powder are added into fly ash, and the fly ash is sintered on a conveyor belt after granulation.
The above fly ash is stabilized and then sent to landfill as hazardous waste.
The defects of the prior fly ash treatment method adopting fly ash chelation and solidification are as follows:
1) the recovery of heavy metals in the fly ash is increased;
2) although the heavy metals in the fly ash are solidified in the fly ash, the solidified fly ash has large volume and causes large landfill pressure on a landfill site;
3) the solidified fly ash can not be recycled;
4) excessive alkali is added in the flue gas treatment process, so that the residual alkali in the fly ash can not be recovered, and waste is caused.
General techniques for treating leachate of domestic garbage and biogas:
the leachate from the garbage bin has high content of suspended matters, the leachate enters a primary sedimentation tank through a special collecting pipeline to remove the suspended matters, and a spiral grating machine is arranged on the pipeline entering the primary sedimentation tank to remove larger particle floating matters. The effluent of the primary sedimentation tank enters an adjusting tank, and percolate coming from the garbage bin stays and mixes at the adjusting tank at different times, so that the functions of balancing water quantity, homogenizing water quality and cooling are achieved. The regulating tank is divided into two functional areas for regulating water quality and water quantity. The adjusting tank has the function of pre-fermentation, and the concentration of part of inlet water organic matters is reduced through the fermentation effect.
After the wastewater is conditioned by the regulating reservoir, the homogenized and uniform amount of wastewater is pumped to the efficient anaerobic reactor by the anaerobic reactor feeding pump, high-concentration organic wastewater is finally converted into methane by anaerobic organisms in the anaerobic reactor to be discharged, and most organic matters in the wastewater are degraded and digested.
Anaerobic effluent is filtered by a bag filter and then enters a primary AO treatment system and a Membrane Biochemical Reactor (MBR) through a water distribution system to remove biochemical organic matters. The low-concentration domestic sewage is directly sent into the intermediate water tank and directly enters the MBR treatment system. The MBR consists of denitrification, nitrification and ultrafiltration units. And (4) dehydrating residual sludge generated by the biochemical system, then sending the dehydrated residual sludge to an incineration plant for incineration, and returning the dehydrated supernatant to the biochemical system for treatment.
Effluent BOD, ammonia nitrogen, suspended matters and the like treated by the MBR reach the discharge standard. But COD, total nitrogen and part of heavy metals still exceed the standard.
The defects of the process flow of the prior percolate treatment station are as follows:
heavy metal ions in the leachate are subjected to membrane filtration, are pulped or sprayed back to an incinerator along with leachate concentrated solution, finally still enter boiler flue gas and finally enter fly ash, and the heavy metal ions cannot be effectively removed from the solution in the leachate treatment stage and only can be concentrated and then return to the incinerator;
when the incinerator is stopped for maintenance, the biogas is directly introduced into a torch for combustion, and H in the biogas 2 S will be converted into SO 2 Acid gas is discharged, and the environment is polluted. The addition of a set of desulfurization equipment for this purpose alone results in a waste of capital.
SUMMERY OF THE UTILITY MODEL
In view of this, the to-be-solved technical problem of the utility model is to provide a processing system of domestic waste, the processing system that this application provided can coprocessing flying dust, landfill leachate and marsh gas.
The application provides a processing system of domestic waste, includes:
a garbage bin;
the leachate treatment device is connected with a leachate outlet of the garbage bin; a clear liquid outlet of the leachate treatment device discharges the purified water body;
the incinerator is connected with a garbage outlet of the garbage bin;
a fly ash washing tank connected to the fly ash outlet of the incinerator; a concentrated solution inlet of the fly ash washing tank is connected with a first concentrated solution outlet of the leachate treatment device;
the dissolution leaching pool is connected with a fly ash concentrated slurry outlet of the fly ash washing pool; the dissolution leaching pool is provided with a detoxified fly ash outlet;
the pH conditioning tank is connected with a leachate outlet of the dissolution leaching tank;
the biogas washing tower is connected with a conditioning liquid outlet of the pH conditioning pool; a biogas inlet of the biogas washing tower is connected with a biogas outlet of the leachate treatment device;
the sedimentation filter tank is connected with a washing liquid outlet of the methane washing tower; and a precipitation outlet of the precipitation filtering tank discharges heavy metal salt precipitate.
Preferably, the leachate treatment device comprises:
a leachate adjusting tank;
the anaerobic reaction tank is connected with the outlet of the leachate regulating tank; a biogas outlet of the anaerobic reaction tank is connected with a biogas inlet of the biogas washing tower;
the membrane bioreactor is connected with the wastewater outlet of the anaerobic reaction tank;
a nanofiltration system connected with the wastewater outlet of the membrane bioreactor;
the reverse osmosis system is connected with a fresh water outlet of the nanofiltration system; a first concentrated water outlet of the reverse osmosis system is connected with a concentrated liquid inlet of the fly ash washing tank; and a fresh water outlet of the reverse osmosis system discharges the purified water body.
Preferably, the leachate treatment device further comprises a sludge concentration tank and a sludge dewatering device;
the sludge inlet of the sludge concentration tank is connected with the sludge outlet of the membrane bioreactor;
the supernatant of the sludge concentration tank flows back to the leachate regulating tank;
conveying the concentrated sludge in the sludge concentration tank to a sludge dewatering device; and the supernatant of the sludge dewatering device flows back to the leachate regulating tank.
Preferably, the sludge dewatering device is a filter press.
Preferably, the supernatant outlet of the sedimentation and filtration tank is connected with the supernatant inlet of the leachate adjusting tank.
Preferably, the second concentrated solution outlet of the leachate treatment device is connected with a concentrated solution nozzle of the incinerator.
Preferably, the processing system further comprises:
the washing wastewater tank is connected with a washing liquid outlet of the fly ash washing tank;
and a washing liquid outlet of the washing wastewater pool is connected with a washing liquid inlet of the pH conditioning pool.
Preferably, the dissolution leaching pool is provided with an acid adding port.
Preferably, the methane washing tower is provided with a first methane outlet and a second methane outlet;
a first methane outlet of the methane washing tower is connected with a methane inlet of the incinerator;
and a second methane outlet of the methane washing tower is connected with a torch.
The application provides a processing system of domestic waste, includes: a garbage bin; the leachate treatment device is connected with a leachate outlet of the garbage bin; a clear liquid outlet of the leachate treatment device discharges the purified water body; the incinerator is connected with a garbage outlet of the garbage bin; a fly ash washing tank connected to the fly ash outlet of the incinerator; a concentrated solution inlet of the fly ash washing tank is connected with a first concentrated solution outlet of the leachate treatment device; the dissolution leaching pool is connected with a fly ash concentrated slurry outlet of the fly ash washing pool; the dissolution leaching pool is provided with a detoxified fly ash outlet; the pH conditioning tank is connected with a leachate outlet of the dissolution leaching tank; the biogas washing tower is connected with a conditioning liquid outlet of the pH conditioning pool; a biogas inlet of the biogas washing tower is connected with a biogas outlet of the leachate treatment device; the sedimentation filter tank is connected with a washing liquid outlet of the methane washing tower; and a precipitation outlet of the precipitation filtering tank discharges heavy metal salt precipitate. The application provides a processing system can coprocessing fly ash, landfill leachate and marsh gas, can realize the purpose that dangerous useless decrement, useless alkali recycle, marsh gas purify and detach the heavy metal in the leachate.
Drawings
FIG. 1 is a diagram of a household waste disposal system according to an embodiment of the present application;
fig. 2 is a diagram of a leachate treatment apparatus provided in an embodiment of the present application.
Detailed Description
The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The application provides a processing system of domestic waste, includes:
a garbage bin;
the leachate treatment device is connected with a leachate outlet of the garbage bin; a clear liquid outlet of the leachate treatment device discharges the purified water body;
the incinerator is connected with a garbage outlet of the garbage bin;
a fly ash washing tank connected to the fly ash outlet of the incinerator; a concentrated solution inlet of the fly ash washing tank is connected with a first concentrated solution outlet of the leachate treatment device;
the dissolution leaching pool is connected with a fly ash concentrated slurry outlet of the fly ash washing pool; the dissolution leaching pool is provided with a detoxified fly ash outlet;
the pH conditioning tank is connected with a leachate outlet of the dissolution leaching tank;
the biogas washing tower is connected with a conditioning liquid outlet of the pH conditioning pool; a biogas inlet of the biogas washing tower is connected with a biogas outlet of the leachate treatment device;
the sedimentation filter tank is connected with a washing liquid outlet of the methane washing tower; and a precipitation outlet of the precipitation filtering tank discharges heavy metal salt precipitate.
Fig. 1 is a diagram of a household garbage disposal system according to an embodiment of the present application.
The application provides a processing system of domestic waste includes the garbage bin. And after the domestic garbage enters the garbage bin, performing natural fermentation in the garbage bin, and naturally rotting part of the domestic garbage after the natural fermentation to obtain a fermented product and leachate stock solution. In certain embodiments of the present application, the temperature of the fermentation is 10 to 30 ℃.
The structure and source of the garbage bin are not particularly limited in this application, and the garbage bin structure known to those skilled in the art can be adopted.
The application provides a domestic waste's processing system still include with the leachate treatment device that the leachate outlet in garbage bin links to each other. And a clear liquid outlet of the leachate treatment device discharges the purified water body.
In certain embodiments of the present application, the treatment system further comprises a leachate collection tank. The leachate stock solution discharged from the garbage bin may be stored in the leachate collection tank and then transported to the leachate treatment apparatus.
The construction and source of the leachate collection tank is not particularly limited and leachate collection tanks known to those skilled in the art may be used.
In certain embodiments of the present application, the leachate treatment apparatus comprises:
a leachate adjusting tank;
the anaerobic reaction tank is connected with the outlet of the leachate regulating tank; a biogas outlet of the anaerobic reaction tank is connected with a biogas inlet of the biogas washing tower;
the membrane bioreactor is connected with the wastewater outlet of the anaerobic reaction tank;
a nanofiltration system connected with the wastewater outlet of the membrane bioreactor;
the reverse osmosis system is connected with a fresh water outlet of the nanofiltration system; a first concentrated water outlet of the reverse osmosis system is connected with a washing liquid inlet of the fly ash washing tank; and a fresh water outlet of the reverse osmosis system discharges the purified water body.
Fig. 2 is a diagram of a leachate treatment apparatus provided in an embodiment of the present application.
The construction and source of the leachate conditioning tank are not particularly limited and leachate conditioning tanks known to those skilled in the art may be used.
The structure and source of the anaerobic reaction tank are not particularly limited in the present application, and may be a generally commercially available anaerobic reaction tank.
In certain embodiments of the present application, the membrane bioreactor comprises:
the waste water inlet is connected with the waste water outlet of the anaerobic reaction tank;
the waste water inlet is connected with the waste water outlet of the two-stage denitrification tank;
the wastewater inlet is connected with the first wastewater outlet of the two-stage nitrification tank; a second wastewater outlet of the two-stage nitrification tank is connected with a first reflux inlet of the two-stage denitrification tank;
a first wastewater outlet of the ultrafiltration system is connected with a wastewater inlet of the nanofiltration system; and a second wastewater outlet of the ultrafiltration system is connected with a second reflux inlet of the two-stage denitrification tank.
In certain embodiments of the present application, the ultrafiltration system is an ultrafiltration membrane. The type and source of the ultrafiltration membrane are not particularly limited, and may be a general commercially available ultrafiltration membrane.
The structure and source of the membrane bioreactor are not particularly limited, and the membrane bioreactor can be a general commercially available membrane bioreactor.
In certain embodiments of the present application, the leachate treatment apparatus further comprises a sludge thickener having a sludge inlet connected to the sludge outlet of the membrane bioreactor. Specifically, a sludge outlet of the two-stage denitrification tank is connected with a sludge inlet of the sludge concentration tank.
In certain embodiments of the present application, the supernatant of the sludge concentration tank is returned to the leachate conditioning tank.
The structure and source of the sludge thickener are not particularly limited, and a sludge thickener known to those skilled in the art may be used.
In certain embodiments of the present application, the leachate treatment apparatus further comprises a sludge dewatering apparatus. Conveying the concentrated sludge in the sludge concentration tank to a sludge dewatering device; and the supernatant of the sludge dewatering device flows back to the leachate regulating tank. The dry sludge discharged by the sludge dewatering device can be conveyed to a garbage storage pit.
In certain embodiments of the present application, the sludge dewatering device is a filter press, which may be generally commercially available, and specifically may be a plate-and-frame filter press or a plate-and-screw filter press.
In certain embodiments of the present application, a portion of the concentrate water discharged from the nanofiltration system is sent to a fly ash washing tank and another portion is sprayed back into the incinerator.
In certain embodiments of the present application, the nanofiltration system is a nanofiltration membrane. The type and source of the nanofiltration membrane are not particularly limited, and the nanofiltration membrane may be a common commercially available nanofiltration membrane.
In certain embodiments of the present application, the reverse osmosis system is a reverse osmosis membrane. The kind and source of the reverse osmosis membrane are not particularly limited, and may be any commercially available reverse osmosis membrane.
In certain embodiments of the present application, a portion of the concentrate discharged by the reverse osmosis system is sent to a fly ash wash tank and another portion is sprayed back into the incinerator.
In this application, leachate treatment device's first concentrate export with the concentrate import of fly ash wash tank links to each other. In certain embodiments of the present application, the first concentrate outlet of the nanofiltration system is connected to the concentrate inlet of the fly ash wash tank. In certain embodiments of the present application, the first concentrate outlet of the reverse osmosis system is connected to the concentrate inlet of the fly ash wash tank.
In certain embodiments of the present application, the second concentrate outlet of the leachate treatment device is connected to the concentrate spout of the incinerator. Specifically, a second concentrated solution outlet of the nanofiltration system is connected with a concentrated solution nozzle of the incinerator; and a second concentrated solution outlet of the reverse osmosis system is connected with a concentrated solution nozzle of the incinerator.
The application provides a processing system of domestic waste still include with the burning furnace that the rubbish export in garbage bin links to each other. The method comprises the steps of burning a fermented product obtained by fermenting household garbage in a burning furnace to obtain fly ash and slag. The fly ash is conveyed to a fly ash washing tank, and the slag can be recycled and used for making bricks and the like.
The structure and source of the incinerator are not particularly limited, and the incinerator may be a commercially available incinerator.
The application provides a processing system of domestic waste still includes the fly ash wash tank who links to each other with the fly ash export of incinerator. And a concentrated solution inlet of the fly ash washing tank is connected with a first concentrated solution outlet of the leachate treatment device. And part of concentrated solution of the leachate treatment device is injected into the fly ash washing tank through a concentrated solution inlet of the fly ash washing tank. The thick liquid entering from the thick liquid inlet of the fly ash washing pool can be used for washing fly ash, and excessive alkali in the fly ash is washed into the thick liquid to obtain washing liquid and fly ash thick slurry. In certain embodiments of the present application, the pH of the wash solution is from 12.5 to 12.7.
In some embodiments of the present application, the fly ash washing tank is a concrete tank with stirring function, and the size and shape of the concrete tank are not particularly limited, and can be selected according to actual needs.
The treatment system of domestic waste that this application provided still includes the dissolution leaching pond that is connected with the thick liquid export of flying ash of the washing pond of said flying ash; the dissolution leaching pool is provided with a detoxified fly ash outlet. In the dissolving and leaching tank, microbial leaching or acid (such as dilute sulfuric acid or dilute hydrochloric acid) dissolving can be adopted, and various harmful heavy metal substances such as Cd, Pb, Zn, Cr and the like in the fly ash are transferred from solid to liquid phase under the condition that the pH value is 2-3, so that heavy metals in the fly ash are removed; with the increase of the leaching time, the concentration of the heavy metal ions in the leaching solution is higher, and the heavy metal ions in the fly ash are removed completely; at the moment, the treatment of the fly ash is basically finished, and the detoxified fly ash without heavy metals belongs to hazardous waste ash, can be recycled and recycled, such as manufacturing building aggregate, brick making and the like.
In some embodiments of the present application, the dissolution leaching tank is a concrete tank body with a stirring function, and the size and shape of the concrete tank body are not particularly limited and can be selected according to actual needs.
The application provides a domestic waste's processing system still include with dissolve the pH conditioning tank that the leachate outlet of leaching pond links to each other. And the leachate of the dissolution leaching pool enters a pH conditioning pool to adjust the pH value.
In some embodiments of the present application, the pH conditioning tank is a concrete tank body with a stirring function, and the size and shape of the concrete tank body are not particularly limited and can be selected according to actual needs.
In certain embodiments of the present application, the processing system further comprises:
the washing wastewater tank is connected with a washing liquid outlet of the fly ash washing tank;
and a washing liquid outlet of the washing wastewater pool is connected with a washing liquid inlet of the pH conditioning pool.
The washing wastewater tank may be used for storage of washing liquid discharged from the fly ash washing tank. In certain embodiments of the present application, the washing wastewater tank is a concrete tank body with a stirring function, and the size and shape of the concrete tank body are not particularly limited and can be selected according to actual needs.
The washing liquid discharged from the washing wastewater tank can be conveyed into a pH conditioning tank to adjust the pH value of the leaching liquid, and when the pH value is adjusted to 6-9, a part of heavy metal salt is precipitated; collecting the heavy metal salt, and conveying the obtained conditioning solution to a biogas washing tower.
The treatment system for the household garbage further comprises a biogas washing tower connected with a conditioning liquid outlet of the pH conditioning tank; and a methane inlet of the methane washing tower is connected with a methane outlet of the leachate treatment device. Specifically, a biogas inlet of the biogas washing tower is connected with a biogas outlet of the anaerobic reaction tank.
The conditioning solution with the pH value adjusted to 6-9 enters a biogas washing tower, and the biogas entering the biogas washing tower is washed, wherein the biogas comprises 30-40% of carbon dioxide (CO) by volume concentration 2 ) And hydrogen sulfide (H) with a volume concentration of 0.005% -0.2% 2 S). After washing, carbonate Me of heavy metal is obtained x (CO 3 ) y And sulfides of heavy metals Me x S y All are insoluble precipitates. Therefore, the washing liquid after being washed by the methane washing tower is washing suspension containing heavy metal precipitates.
In certain embodiments of the present application, the biogas scrubber is provided with a first biogas outlet and a second biogas outlet;
a first methane outlet of the methane washing tower is connected with a methane inlet of the incinerator;
and a second methane outlet of the methane washing tower is connected with a torch.
In some embodiments of the present application, the biogas washing tower is a packed tower or a spray tower, and a glass fiber reinforced plastic material can be selected. The product can be made by self according to actual needs, and can also be sold in general markets.
CO in biogas 2 And H 2 S participates in the precipitation process of heavy metal ions in the washing process, because of CO 2 And H 2 S is chemically different from CO 2 The volume fraction is significantly reduced, and H 2 S can be removed completely, so that the aim of purifying the biogas is fulfilled. The purified marsh gas is burnt in the incinerator under the condition that the incinerator is normally operated, and the residual hydrogen sulfide in the marsh gas can be removed when the marsh gas is burnt by a torch under the condition that the incinerator is overhauled, so that the harm of tail gas generated by marsh gas burning to the environment is greatly reduced.
The treatment system for the household garbage further comprises a sedimentation filter tank connected with a washing liquid outlet of the methane washing tower; and a precipitation outlet of the precipitation filtering tank discharges heavy metal salt precipitate.
And (3) precipitating the washing turbid liquid containing the heavy metal precipitate in the precipitation filtering tank to obtain heavy metal salt precipitate and heavy metal removal washing liquid.
In some embodiments of the present application, the sedimentation filter tank is a concrete tank body with a stirring function, and the size and shape of the concrete tank body are not particularly limited, and can be selected according to actual needs.
In certain embodiments of the present application, the supernatant outlet of the sedimentation filtration tank is connected to the supernatant inlet of the leachate treatment device. Specifically, a supernatant outlet of the sedimentation and filtration tank is connected with a supernatant inlet of the leachate adjusting tank.
The heavy metal salt precipitation can be subjected to subsequent treatment (landfill or heavy metal recovery) together with the heavy metal salt precipitation in the pH conditioning tank.
The source of the above-mentioned raw materials is not particularly limited, and the raw materials may be generally commercially available.
Has the advantages that:
1) the application provides a system for coprocessing fly ash, landfill leachate and marsh gas can reach the purpose that danger waste decrement, alkali waste recycle, marsh gas purify and detach heavy metal in the leachate simultaneously.
2) Detoxification of fly ash and resource utilization:
in the dissolution leaching pool, heavy metals in the fly ash are transferred into leaching liquid from the original fly ash through bioleaching or acid dissolution, and through the step, the fly ash is detoxified and recycled.
Under the environment with good conditions, the leaching efficiency of the microbial leaching action can reach more than 90%, and the leaching efficiency of the acid dissolution action can also reach more than 90-95%.
3) Recycling of excess alkali in fly ash:
excess alkali in the fly ash is washed out, and when the pH is adjusted, the waste alkali liquor is used for precipitating heavy metal compounds sensitive to the pH, so that heavy metal salts are separated out by using the waste alkali;
in the pH conditioning tank, part of residual alkalinity still remains in the solution after heavy metal precipitation, and the alkalinity is utilized to absorb acid gas CO in the biogas 2 And H 2 S。
4) Removing sulfur in the biogas:
because the marsh gas is washed in a marsh gas washing tower by a washing liquid containing heavy metal ions and certain alkalinity, HS in the marsh gas - And S 2- And the S element in the methane is removed by converting the methane into metal sulfide precipitate.
5) The very big reduction of heavy metal danger waste product volume reduces the useless pressure of handling of danger:
as the fly ash is chelated and solidified and then buried in the prior art, and the heavy metal salt in the fly ash is precipitated and then buried in the prior art, all the fly ash in the prior art is hazardous waste, but only the heavy metal salt is precipitated and is hazardous waste in the prior art. Therefore, the hazardous waste volume is expected to be reduced by more than 90%.
6) When the incinerator is stopped for maintenance, the biogas burned by the torch meets the environmental protection requirement, and the service life of the torch can be protected;
because the acid gas in the biogas is removed, the purpose of environmental protection can be achieved during combustion, meanwhile, the corrosion of the acid gas to the torch is reduced, and the service life of the torch is prolonged.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A system for disposing of household waste, comprising:
a garbage bin;
the leachate treatment device is connected with a leachate outlet of the garbage bin; a clear liquid outlet of the leachate treatment device discharges the purified water body;
the incinerator is connected with a garbage outlet of the garbage bin;
a fly ash washing tank connected to the fly ash outlet of the incinerator; a concentrated solution inlet of the fly ash washing tank is connected with a first concentrated solution outlet of the leachate treatment device;
the dissolution leaching pool is connected with a fly ash concentrated slurry outlet of the fly ash washing pool; the dissolution leaching pool is provided with a detoxified fly ash outlet;
the pH conditioning tank is connected with a leachate outlet of the dissolution leaching tank;
the biogas washing tower is connected with a conditioning liquid outlet of the pH conditioning pool; a biogas inlet of the biogas washing tower is connected with a biogas outlet of the leachate treatment device;
the sedimentation filter tank is connected with a washing liquid outlet of the methane washing tower; and a precipitation outlet of the precipitation filtering tank discharges heavy metal salt precipitate.
2. The household garbage disposal system according to claim 1, wherein said leachate treatment apparatus comprises:
a leachate adjusting tank;
the anaerobic reaction tank is connected with the outlet of the leachate regulating tank; a biogas outlet of the anaerobic reaction tank is connected with a biogas inlet of the biogas washing tower;
the membrane bioreactor is connected with the wastewater outlet of the anaerobic reaction tank;
a nanofiltration system connected with the wastewater outlet of the membrane bioreactor;
the reverse osmosis system is connected with a fresh water outlet of the nanofiltration system; a first concentrated water outlet of the reverse osmosis system is connected with a concentrated liquid inlet of the fly ash washing tank; and a fresh water outlet of the reverse osmosis system discharges the purified water body.
3. The system for treating household garbage according to claim 2, wherein the leachate treatment device further comprises a sludge concentration tank and a sludge dewatering device;
the sludge inlet of the sludge concentration tank is connected with the sludge outlet of the membrane bioreactor;
the supernatant of the sludge concentration tank flows back to the leachate regulating tank;
conveying the concentrated sludge in the sludge concentration tank to a sludge dewatering device; and the supernatant of the sludge dewatering device flows back to the leachate regulating tank.
4. The system for treating household garbage according to claim 3, wherein the sludge dewatering device is a filter press.
5. The household garbage disposal system according to claim 2, wherein the supernatant outlet of said sedimentation and filtration tank is connected to the supernatant inlet of said leachate control tank.
6. The system for disposing of household garbage according to claim 1, wherein the second concentrate outlet of the leachate treatment device is connected to the concentrate spout of the incinerator.
7. The system for disposing of household waste according to claim 1, further comprising:
the washing wastewater tank is connected with a washing liquid outlet of the fly ash washing tank;
and a washing liquid outlet of the washing wastewater pool is connected with a washing liquid inlet of the pH conditioning pool.
8. The household garbage disposal system according to claim 1, wherein said dissolution leaching tank is provided with an acid adding port.
9. The system for treating household garbage according to claim 1, wherein the biogas washing tower is provided with a first biogas outlet and a second biogas outlet;
a first methane outlet of the methane washing tower is connected with a methane inlet of the incinerator;
and a second methane outlet of the methane washing tower is connected with a torch.
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| CN202221191185.5U CN217127219U (en) | 2022-05-18 | 2022-05-18 | Household garbage treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117583361A (en) * | 2023-11-30 | 2024-02-23 | 夏江(乌兰察布)环保科技有限公司 | Environment-friendly treatment system for landfill of steelmaking ironmaking waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117583361A (en) * | 2023-11-30 | 2024-02-23 | 夏江(乌兰察布)环保科技有限公司 | Environment-friendly treatment system for landfill of steelmaking ironmaking waste |
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