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CN112879914A - Household garbage emergency treatment method for household garbage incineration power plant - Google Patents

Household garbage emergency treatment method for household garbage incineration power plant Download PDF

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Publication number
CN112879914A
CN112879914A CN202110098806.9A CN202110098806A CN112879914A CN 112879914 A CN112879914 A CN 112879914A CN 202110098806 A CN202110098806 A CN 202110098806A CN 112879914 A CN112879914 A CN 112879914A
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treatment
domestic waste
biological
leachate
power plant
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Chinese (zh)
Inventor
周友华
闫喜凤
徐洁
贾美玉
卢玢宇
余小霞
刘文文
蒋浩
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East China Institute of Technology
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East China Institute of Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/442—Waste feed arrangements
    • F23G5/444—Waste feed arrangements for solid waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/10—Drying by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/60—Separating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/80—Shredding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

本发明提供了一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，包括：称重和卸料，破碎，磁选；生物干化，在生物干化池内进行好氧生物反应，并投加生物菌种除臭，并输送至暂存仓库；转运；渗滤液收集及处理，上述步骤产生的渗滤液及除臭废水收集至渗滤液收集池，并输送至渗滤液处理站处理；臭气收集及处理，将上述步骤产生的臭气收集至生物滤池处理，达到排放标准，且设置植物液空间雾化喷淋及新风送风系统辅助除臭，还包括压缩或筛分。本发明不仅解决了现在生活垃圾应急填埋存在的问题，规避了“邻避效应”，减少了占地面积，节省了建设成本；而且避免了搬运过程中对环境的二次污染及安全隐患，实现了生活垃圾的可资源化。

Figure 202110098806

The invention provides an emergency treatment method for domestic waste in a domestic waste incineration power plant, which includes: weighing and unloading, crushing, magnetic separation; biological drying, performing aerobic biological reaction in a biological drying tank, and adding Biological strains are deodorized and transported to the temporary storage warehouse; transport; leachate collection and treatment, the leachate and deodorized wastewater generated in the above steps are collected in the leachate collection tank, and transported to the leachate treatment station for treatment; odor collection and treatment, the odor generated in the above steps is collected to the biological filter for treatment to meet the discharge standard, and the plant liquid space atomization spray and fresh air supply system are set to assist deodorization, and also include compression or screening. The present invention not only solves the existing problems in the emergency landfill of domestic waste, avoids the "NIMBY effect", reduces the floor space and saves the construction cost; Realize the recycling of domestic waste.

Figure 202110098806

Description

Household garbage emergency treatment method for household garbage incineration power plant
Technical Field
The invention relates to the technical field of garbage treatment, in particular to an emergency treatment method for household garbage in a household garbage incineration power plant.
Background
With the push of the policy of domestic waste incineration power generation in China, domestic waste incineration power generation mainly is implemented, and by the end of 2020, the domestic waste incineration power generation scale of 50 ten thousand tons/day is processed in China, and the domestic waste incineration power generation scale of 40 ten thousand tons/day is predicted to be newly built in the period of fourteen five days, at the moment, the domestic waste incineration power generation scale of China reaches 90 ten thousand tons/day.
At present, regular or irregular equipment maintenance and overhaul are required to be carried out on a household garbage incineration power plant every year, and during the equipment maintenance period, the household garbage generally temporarily exists in a household garbage sanitary landfill or a newly-built emergency landfill as emergency treatment (often called as 'emergency landfill'). The emergency landfill of the household garbage not only needs perfect landfill facilities, the treatment difficulty of secondary pollutants generated in the landfill process is large, and the adjacent avoidance effect is easy to cause, but also has the risk of secondary environmental pollution and the potential safety hazards of collapse of garbage piles, methane explosion and the like in the excavation and transportation process.
Therefore, in order to solve the above problems, it is urgently needed to provide a new emergency treatment method for domestic garbage in a domestic garbage incineration power plant, which is a technical problem to be solved in the field.
Disclosure of Invention
In view of the above, the invention provides an emergency treatment method for domestic garbage in a domestic garbage incineration power plant, which not only solves the problems existing in the current domestic garbage emergency landfill, avoids the 'proximity effect', reduces the occupied area and saves the construction cost; and the secondary pollutants are effectively controlled, the secondary pollution and potential safety hazards to the environment in the carrying process are avoided, the recycling of the household garbage is realized, and the land resources are saved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a domestic waste emergency treatment method for a domestic waste incineration power plant specifically comprises the following steps:
s1: weighing and discharging;
s2: crushing;
s3: magnetic separation;
s4: biological drying, namely performing aerobic biological reaction on the household garbage treated by S3, and adding biological strains for deodorization;
s5: compressing, namely compressing the household garbage processed by the S4;
s6: temporary storage, namely conveying the household garbage subjected to biological drying treatment of S4 or compressed by S5 to a temporary storage bin for temporary storage;
s7: transferring, namely conveying the household garbage in the temporary storage bin into a material pit of an incineration power plant;
s8: collecting and treating percolate, namely collecting the landfill percolate generated by S1-S7 to a percolate collecting tank, conveying the percolate to a percolate treatment station for treatment, and discharging the percolate to a municipal sewage pipe network when the percolate reaches a nano pipe discharge standard;
s9: collecting and treating odor, namely collecting the odor generated by S1-S8 to a biological filter for treatment by an induced draft fan, discharging the odor by a tail gas discharge cylinder when the odor reaches the discharge standard, and arranging a plant liquid space atomization spraying system and a fresh air blowing system in a treatment workshop for assisting deodorization; and the deodorizing wastewater produced by the S9 and the landfill leachate produced by the S1-S7 are collected in a leachate collecting tank and then conveyed to a leachate treatment station for treatment.
Adopt above-mentioned technical scheme's beneficial effect: according to the invention, through crushing and magnetic separation, on one hand, the effects of subsequent biological drying and compression dehydration can be improved, and the recycling of resources is realized; on the other hand, the addition of the biological drying process can effectively remove partial water and organic matters in the garbage, and simultaneously, the deodorization of the biological strains further effectively removes the malodorous gas in the garbage, thereby avoiding secondary pollution to the environment. The compression of the domestic garbage by the invention can effectively reduce the construction of temporary storage facilities, thereby not only effectively protecting the environment and saving the energy, but also reducing the cost.
Furthermore, the invention avoids the 'proximity effect', reduces the occupied area and saves the construction cost by the technical processes of weighing/unloading, crushing, magnetic separation, biological drying, compression, temporary storage, transportation, percolate collection and treatment, odor collection and treatment and the like; meanwhile, secondary pollutants are effectively controlled, secondary pollution to the environment and potential safety hazards in the carrying process are avoided, the recycling of household garbage is realized, and land resources are saved.
Preferably, the crushing of S2 is crushing of household garbage to a particle size of <200 mm.
Adopt above-mentioned technical scheme's beneficial effect: the particle size is smaller than 200mm by crushing, so that the subsequent biological drying is facilitated to remove partial water and organic matters of the domestic garbage, and the compression efficiency and the dehydration efficiency in the compression dehydration process are improved.
Preferably, the crushing of S2 is performed by crushing the domestic garbage using a twin-shaft crusher.
Adopt above-mentioned technical scheme's beneficial effect: the household garbage crushing of the double-shaft crusher is more thorough, and the technical effect of subsequent processes is improved.
Preferably, the temperature of the aerobic biological reaction of S4 is 50-60 ℃, and the time is 10-15 days.
Adopt above-mentioned technical scheme's beneficial effect: adopt above-mentioned technical scheme's beneficial effect: the water evaporation capacity of the garbage through aerobic biological reaction accounts for 10-15% of the domestic garbage amount, the water content of the garbage is less than or equal to 35%, the scale of subsequent treatment facilities and the number of devices are reduced, and the construction cost and the treatment cost are reduced.
Preferably, the biological strains are selected from one or a mixture of several of bacteria, fungi and actinomycetes existing in the domestic garbage; among them, yeast among fungi is preferable.
Adopt above-mentioned technical scheme's beneficial effect: by adding the biological strains, the removal effect of the biological drying tank on the odorous pollutants such as hydrogen sulfide, mercaptan, methanol, organic amine, ammonia and the like is improved.
Preferably, the adding amount of the biological strains accounts for 0.l-0.2 per mill of the volume of the household garbage.
Adopt above-mentioned technical scheme's beneficial effect: adopt above-mentioned technical scheme's beneficial effect: by adding biological strains, odor pollutants which are not less than 80 percent in the garbage are removed, the odor treatment capacity and the odor concentration are reduced, the construction cost and the treatment cost are saved, and the secondary pollution of the odor gas to the environment in the transfer process is avoided.
Preferably, the biological drying process of S4 is performed by a biological drying tank; the biological drying tank is a closed structure, the height of the tank is 5-6 m, and a percolate collecting tank and a ventilation ditch are arranged at the bottom of the tank; air supply enters from the ventilation ditch, and penetrating fluid flows into a liquid collecting pipe of the ventilation ditch and is collected to a percolate collecting pool.
Further, the air supply is forced to ventilate through an air blower, and the air supply amount is 0.05-0.15 m per cubic meter of garbage3Air/min, and the oxygen content is controlled to be 12-16%, and the oxygen content is controlled by the variable frequency of an air blower.
Adopt above-mentioned technical scheme's beneficial effect: the garbage is fast and stable, secondary pollutants are effectively controlled, and secondary pollution to the environment in the transferring process is avoided; the evaporation capacity of the water of the garbage through the aerobic biological reaction accounts for 10-15% of the quantity of the household garbage, the removal rate of the odor pollutants of the garbage is more than or equal to 80%, and the water content of the garbage is less than or equal to 35%.
Preferably, S8 the leachate collection and treatment station is further provided with a leachate treatment station, the leachate treatment station comprising: an anaerobic reactor and an MBR system;
wherein, the MBR system comprises a homogenizing tank, a two-stage A/O biochemical reaction tank and an external tubular membrane;
adopt above-mentioned technical scheme's beneficial effect: the organic pollutant removal rate of the anaerobic reactor is more than or equal to 80 percent; the quality of the effluent water treated by the MBR system reaches the nano-tube discharge standard.
Preferably, the odor removal rate of the biological filter of S9 is more than or equal to 90%, the treated tail gas reaches the emission standard, the tail gas is emitted through an exhaust funnel, and the height of the exhaust funnel from the ground is not less than 15 m.
Preferably, the fresh air supply system in the step S9 supplies the outdoor air to a proper position of the processing workshop through the air supply blower, so that the odor concentration of the workshop is reduced;
plant liquid space atomizing spray system's plant liquid atomizing shower nozzle sets up in the foul smell source position that gives off the foul smell, regularly sprays the plant liquid, improves the operational environment.
Preferably, the compression density of S5 is more than or equal to 1.2t/m3The water content is less than or equal to 35 percent.
Adopt above-mentioned technical scheme's beneficial effect: the garbage volume is reduced, the number of transfer containers and transfer vehicles is reduced, the construction cost and the treatment cost are saved, and the energy consumption is saved.
Preferably, the method further comprises the following steps: and primary screening, wherein the primary screening is performed after the magnetic separation operation of S3 and before the biochemical drying treatment of S4.
Preferably, the method further comprises the following steps: crushing and sieving again; and the secondary crushing and the secondary screening are sequentially carried out after the biochemical drying treatment operation of S4, and S6 is directly carried out after the secondary screening operation is finished.
Adopt above-mentioned technical scheme's beneficial effect: the secondary crushing and secondary screening are beneficial to improving the biological drying effect of the household garbage, the water evaporation amount and the organic matter removal rate are improved, and the percolate generation amount is reduced; the density of the garbage is improved, and the garbage can be directly packed and transported without being compressed; the separation of inert substances in the household garbage is facilitated, and the heat value of the household garbage is improved.
Preferably, the discharging step S1 is carried out to a receiving bin, and the volume of the receiving bin is more than 40% of the volume of daily domestic garbage treatment.
Adopt above-mentioned technical scheme's beneficial effect: the phenomenon of queuing of the garbage transport vehicles in the peak period is avoided, and the scale of the compression transfer facility can be reduced.
Preferably, the magnetic separation of S3 is to recover the metallic substances in the household garbage.
Adopt above-mentioned technical scheme's beneficial effect: the effective recovery of resources is realized, and the energy is saved.
In summary, compared with the prior art, the invention has at least the following technical advantages:
1) compressed to the density of more than or equal to 1.2t/m by the invention3The occupied area is reduced, the construction cost is saved, and the land resources are saved;
2) the water content of the household garbage treated by the method is less than or equal to 35 percent, so that secondary pollution to the environment is avoided;
3) by utilizing the biological drying process, the odor gas is prevented from overflowing in the garbage carrying process, and the problem of secondary pollution to the environment is solved;
4) the treatment method of the invention improves the heat value of the domestic garbage and reduces the cost of auxiliary fuel of a burning power plant; potential safety hazards such as collapse of garbage piles, methane explosion and the like in the garbage carrying process are avoided; the 'proximity effect' is avoided, and secondary pollutants are effectively controlled;
meanwhile, the household garbage subjected to emergency treatment is recycled, and metal resources in the household garbage are recovered;
6) by utilizing the biological drying process, the water evaporation amount accounts for 10-15% of the quantity of the household garbage, the removal rate of organic pollutants in the garbage is more than or equal to 80%, and the construction cost and the treatment cost are saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a method for emergency treatment of domestic waste in a domestic waste incineration power plant, disclosed in embodiment 1 of the present invention.
Fig. 2 is a domestic waste emergency treatment method for a domestic waste incineration power plant disclosed in embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment 1 of the invention discloses a domestic waste emergency treatment method for a domestic waste incineration power plant, which specifically comprises the following steps:
s1: weighing and discharging;
s2: crushing;
s3: magnetic separation;
s4: biological drying, namely performing aerobic biological reaction on the household garbage treated by S3, and adding biological strains for deodorization;
s5: compressing, namely compressing the household garbage processed by the S4 to form garbage blocks;
s6: temporary storage, namely conveying the garbage blocks to a temporary storage bin for temporary storage;
s7: transferring, namely conveying the garbage blocks in the temporary storage bin into a material pit of an incineration power plant;
s8: collecting and treating percolate, namely collecting the landfill percolate generated by S1-S7 to a percolate collecting tank, conveying the percolate to a percolate treatment station for treatment, and discharging the percolate to a municipal sewage pipe network when the percolate reaches the nano pipe discharge standard;
s9: collecting and treating odor, namely collecting the odor generated by S1-S8 to a biological filter for treatment by an induced draft fan, discharging the odor by a tail gas discharge cylinder when the odor reaches the discharge standard, and arranging a plant liquid space atomization spraying system and a fresh air blowing system in a treatment workshop for assisting deodorization;
and the deodorizing wastewater produced by the S9 and the landfill leachate produced by the S1-S7 are collected in a leachate collecting tank and then conveyed to a leachate treatment station for treatment.
In order to further optimize the technical scheme, the step of S2 crushing is to crush the household garbage to the particle size of less than 200 mm.
In order to further optimize the technical scheme, the S2 crushing adopts a double-shaft crusher to crush the domestic garbage.
In order to further optimize the technical scheme, the temperature of the aerobic biological reaction of S4 is 50-60 ℃, and the time is 10-15 days.
In order to further optimize the technical scheme, the biological strains are selected from one or a mixture of several of bacteria, fungi and actinomycetes existing in the domestic garbage; among them, yeast among fungi is preferable.
In order to further optimize the technical scheme, the adding amount of the biological strains accounts for 0.l-0.2 per mill of the volume of the household garbage.
In order to further optimize the technical scheme, the biological drying process of S4 is carried out by a biological drying tank; the biological drying tank is a closed structure, the height of the tank is 5-6 m, and a percolate collecting tank and a ventilation ditch are arranged at the bottom of the tank;
air supply enters from the ventilation ditch, and penetrating fluid flows into a liquid collecting pipe of the ventilation ditch and is collected to a percolate collecting pool.
In order to further optimize the technical scheme, air supply is realized by forced ventilation of a blower, and the air supply amount is 0.05-0.15 m per cubic meter of garbage3Air/min, controlling the oxygen content to be 12-16%, and controlling the oxygen content through variable frequency of a blower; the removal rate of the odor pollutants in the garbage is more than or equal to 80 percent, and the water content of the garbage is less than or equal to 35 percent.
In order to further optimize the above technical solution, the S8 leachate collection and treatment is further provided with a leachate treatment station, the leachate treatment station comprises: an anaerobic reactor and an MBR system;
wherein, the MBR system comprises a homogenizing tank, a two-stage A/O biochemical reaction tank and an external tubular membrane;
and the removal rate of organic pollutants of the anaerobic reactor is more than or equal to 80 percent; the quality of the effluent water treated by the MBR system reaches the nano-tube discharge standard.
Meanwhile, the odor removal rate of the S9 biofilter is more than or equal to 90%, the treated tail gas reaches the emission standard, the tail gas is emitted through an exhaust funnel, and the height of the exhaust funnel from the ground is not less than 15 m.
In order to further optimize the technical scheme, the S9 fresh air supply system supplies outdoor air to a proper position of a processing workshop through a blower to reduce the odor concentration of the workshop;
plant liquid space atomizing spraying system's plant liquid atomizing shower nozzle sets up in the foul smell source position that gives off the foul smell, regularly sprays the plant liquid, improves the operation environment.
In order to further optimize the technical scheme, the S5 compressed density is more than or equal to 1.2t/m3The water content is less than or equal to 35 percent.
In order to further optimize the technical scheme, S1 is discharged to a receiving bin, and the volume of the receiving bin is more than 40% of the daily volume of the domestic garbage.
In order to further optimize the technical scheme, S3 magnetic separation is used for recovering metal substances in the household garbage.
Example 2
The embodiment 2 of the invention discloses an emergency treatment method for a household garbage incineration power plant, which specifically comprises the following steps:
s1: weighing and discharging;
s2: crushing;
s3: magnetic separation;
s4: primary screening;
s5: biological drying, namely performing aerobic biological reaction on the domestic garbage, and adding biological strains for deodorization;
s6: secondary crushing, namely performing secondary crushing on the household garbage processed by S5 on the S4 oversize products and the oversize products obtained by secondary screening of S7;
s7: secondary screening, wherein the household garbage processed by S5 and the household garbage processed by S6 are subjected to secondary screening on the S4 undersize;
s8: temporarily storing, namely, the screened material of S7 is RDF, and conveying the RDF to a temporary storage bin for temporarily storing;
s9: transferring, namely transferring the RDF in the temporary storage bin to an incineration power plant;
s10: collecting and treating percolate, namely collecting the landfill percolate generated by S1-S5 and the deodorization wastewater generated by S9 into a percolate collecting tank, conveying the percolate to a percolate treatment station for treatment, and discharging the percolate to a municipal sewage pipe network after reaching a nano-pipe discharge standard;
s11: collecting and treating odor, collecting odor generated by S1-S10 to a biological filter by an induced draft fan to treat the odor to reach the emission standard, and discharging the odor, wherein a plant liquid space atomizing and spraying system and a fresh air supply system are arranged in a treatment workshop to assist in deodorization.
In order to further optimize the technical scheme, the step of S2 is to crush the household garbage to the particle size of less than 200 mm.
In order to further optimize the technical scheme, the domestic garbage is crushed by a double-shaft crusher in S2 primary crushing.
In order to further optimize the technical scheme, the primary screening of S4 is to divide the domestic garbage into oversize products and undersize products.
In order to further optimize the technical scheme, a triangular screen with the aperture of 200mm is adopted for primary screening of S4.
In order to further optimize the technical scheme, the temperature of the aerobic biological reaction of S5 is 50-60 ℃, and the time is 10-15 days.
In order to further optimize the technical scheme, the biological strains are selected from one or a mixture of several of bacteria, fungi and actinomycetes existing in the domestic garbage; among them, yeast among fungi is preferable.
In order to further optimize the technical scheme, the adding amount of the biological strains accounts for 0.l-0.2 per mill of the volume of the household garbage.
In order to further optimize the technical scheme, the biological drying process of S5 is carried out by a biological drying tank.
The biological drying tank is a closed structure, the height of the tank is 5-6 m, and a percolate collecting tank and a ventilation ditch are arranged at the bottom of the tank;
air supply enters from the ventilation ditch, and penetrating fluid flows into a liquid collecting pipe of the ventilation ditch and is collected to a percolate collecting pool.
In order to further optimize the technical scheme, the air supply is forced to ventilate by a blower, and the air supply amount is per cubic meterThe garbage is 0.05-0.15 m3Air/min, controlling the oxygen content to be 12-16%, and controlling the oxygen content through variable frequency of a blower; the water evaporation amount of the garbage through aerobic biological reaction accounts for 10-15% of the amount of the domestic garbage, the removal rate of the odor pollutants of the garbage is more than or equal to 80%, and the water content of the garbage is less than or equal to 35%.
In order to further optimize the technical scheme, the step S6 of secondary crushing is to crush the household garbage to the particle size of less than 80 mm.
In order to further optimize the technical scheme, the S6 secondary crushing double-shaft crusher crushes the domestic garbage.
In order to further optimize the technical scheme, the secondary screening of S7 is to divide the domestic garbage into oversize products and undersize products.
In order to further optimize the technical scheme, a triangular sieve with the aperture of 80mm is adopted for secondary screening of S7.
In order to further optimize the technical scheme, the S7 screen underflow is RDF, and the heat value of the RDF is more than or equal to 2200 Kcal/Kg.
In order to further optimize the above technical solution, the S10 leachate collection and treatment is further provided with a leachate treatment station, the leachate treatment station comprises: an anaerobic reactor and an MBR system;
wherein, the MBR system comprises a homogenizing tank, a two-stage A/O biochemical reaction tank and an external tubular membrane;
and the removal rate of organic pollutants of the anaerobic reactor is more than or equal to 80 percent; the quality of the effluent water treated by the MBR system reaches the nano-tube discharge standard.
In order to further optimize the technical scheme, the odor removal rate of the S11 biofilter is more than or equal to 90%, the treated tail gas reaches the emission standard, the tail gas is emitted through the exhaust funnel, and the height of the exhaust funnel from the ground is not less than 15 m.
In order to further optimize the technical scheme, the S11 fresh air supply system supplies outdoor air to a proper position of a processing workshop through a blower to reduce the odor concentration of the workshop;
plant liquid space atomizing spraying system's plant liquid atomizing shower nozzle sets up in the foul smell source position that gives off the foul smell, regularly sprays the plant liquid, improves the operation environment.
In order to further optimize the technical scheme, S1 is discharged to a receiving bin, and the volume of the receiving bin is more than 40% of the daily volume of the household garbage.
In order to further optimize the technical scheme, S3 magnetic separation is used for recovering metal substances in the household garbage.
Application example
The application example provides a domestic waste emergency treatment method for a domestic waste incineration power plant based on embodiment 1, and specifically comprises the following steps:
s1: weighing and discharging: wherein the treatment capacity of the domestic garbage is 300-400 t/d, the water content is 50-60%, and the garbage density is 0.65-0.73 t/m3；
S2: crushing:
s3: magnetic separation: wherein the recovery amount of the metal substances is 0.5-1.0 t/d;
s4: biological drying, namely performing aerobic biological reaction on the household garbage treated by S3, and adding biological strains for deodorization;
wherein, 4 biological drying tanks are arranged, and the effective volume of a single biological drying tank is 1500m3The height of the pool is 5.5m, the aerobic reaction temperature is controlled to be 53-58 ℃, and the air supply amount per cubic meter of domestic garbage is controlled to be 0.08-0.12 m3Air/min, oxygen content is controlled to be 12-16%, the adding amount of biological strains is 50-60 kg/d, after biological drying treatment, the water content of the household garbage is 27-32%, the water evaporation amount is 38-50 t/d, the collection amount of percolate is about 30-40 t/d, and the removal rate of organic pollutants is high>80%, and the removal rate of the odor pollutants is 80.3-87.1%;
s5: compressing, namely compressing the household garbage processed by the S4 to form garbage blocks;
wherein the compression density is 1.2-1.25 t/m3The water content is 27-32%;
s6: temporary storage, namely conveying the garbage blocks to a temporary storage bin for temporary storage;
s7: transferring, namely conveying the garbage blocks in the temporary storage bin into a material pit of an incineration power plant;
s8: collecting and treating percolate, namely collecting the landfill percolate generated by S1-S7 to a percolate collecting tank, conveying the percolate to a percolate treatment station for treatment, and discharging the percolate to a municipal sewage pipe network when the percolate reaches the nano pipe discharge standard;
s9: collecting and treating odor, namely collecting the odor generated by S1-S8 to a biological filter for treatment by an induced draft fan, discharging the odor by a tail gas discharge cylinder when the odor reaches the discharge standard, and arranging a plant liquid space atomization spraying system and a fresh air blowing system in a treatment workshop for assisting deodorization;
and the deodorization wastewater generated by S9 and the landfill leachate generated by S1-S7 are collected in a leachate collecting tank and then conveyed to a leachate treatment station for treatment;
wherein the odor collection amount is about 25000m3And h, adopting a biological filter for treatment, wherein the odor removal rate reaches 93 percent, and the treated tail gas reaches the standard and is discharged.
In order to further optimize the technical scheme, the step of S2 crushing is to crush the household garbage to the particle size of less than 200 mm.
In order to further optimize the technical scheme, the S2 crushing adopts a double-shaft crusher to crush the domestic garbage.
In order to further optimize the technical scheme, the aerobic biological reaction time of S4 is 10-15 days.
In order to further optimize the technical scheme, the biological strains are selected from one or a mixture of several of bacteria, fungi and actinomycetes existing in the domestic garbage; among them, yeast among fungi is preferable.
In order to further optimize the technical scheme, the S4 biological drying tank is a closed structure, the height of the tank is 5.5m, and a percolate collecting tank and a ventilation ditch are arranged at the bottom of the tank;
air supply enters from the ventilation ditch, and penetrating fluid flows into a liquid collecting pipe of the ventilation ditch and is collected to a percolate collecting pool.
In order to further optimize the technical scheme, the air supply is realized by forced ventilation of a blower, and the oxygen content is controlled by the variable frequency of the blower.
In order to further optimize the above technical solution, the S8 leachate collection and treatment is further provided with a leachate treatment station, the leachate treatment station comprises: an anaerobic reactor and an MBR system;
wherein, the MBR system comprises a homogenizing tank, a two-stage A/O biochemical reaction tank and an external tubular membrane;
and the removal rate of organic pollutants of the anaerobic reactor is more than or equal to 80 percent; the quality of the effluent water treated by the MBR system reaches the nano-tube discharge standard.
And S8, collecting the percolate by about 50t/d (containing about 35t/d of percolate collecting amount and about 15t/d of other waste water such as equipment washing water, ground washing water, deodorization waste water and the like), treating the percolate by adopting a UASB (upflow anaerobic sludge bed reactor) and MBR (upflow anaerobic sludge bed reactor) process, and discharging the percolate into a municipal sewage pipe network after reaching the nano-pipe standard.
Meanwhile, the tail gas is discharged through an exhaust funnel, and the height of the exhaust funnel from the ground is not less than 15 m.
In order to further optimize the technical scheme, the S9 fresh air supply system supplies outdoor air to a proper position of a processing workshop through a blower to reduce the odor concentration of the workshop;
plant liquid space atomizing spraying system's plant liquid atomizing shower nozzle sets up in the foul smell source position that gives off the foul smell, regularly sprays the plant liquid, improves the operation environment.
In order to further optimize the technical scheme, the S5 compressed density is more than or equal to 1.2t/m3The water content is less than or equal to 35 percent.
In order to further optimize the technical scheme, S1 is discharged to a receiving bin, and the volume of the receiving bin is more than 40% of the daily volume of the household garbage.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
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 (10)

1.一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，具体包括以下步骤：1. a method for emergency treatment of domestic waste in a domestic waste incineration power plant, is characterized in that, specifically comprises the following steps: S1：称重和卸料；S1: weighing and unloading; S2：破碎；S2: broken; S3：磁选；S3: Magnetic separation; S4：生物干化，经过S3处理后的生活垃圾进行好氧生物反应，并投加生物菌种除臭；S4: biological drying, the domestic waste treated by S3 is subjected to aerobic biological reaction, and biological bacteria are added to deodorize; S5：压缩，对经过S4处理后的生活垃圾进行压缩；S5: Compression, compress the domestic garbage after S4 treatment; S6：暂存，将经S4生物干化处理后或经S5压缩后的生活垃圾输送至暂存仓暂存；S6: Temporary storage, the domestic garbage after S4 biological drying treatment or compressed by S5 is transported to the temporary storage warehouse for temporary storage; S7：转运，将暂存仓内的生活垃圾输送至焚烧发电厂料坑内；S7: Transfer, transport the domestic garbage in the temporary storage warehouse to the material pit of the incineration power plant; S8：渗滤液收集及处理，将S1-S7产生的垃圾渗滤液收集至渗滤液收集池，再输送至渗滤液处理站处理，达到纳管排放标准排至市政污水管网；S8: leachate collection and treatment, the landfill leachate produced by S1-S7 is collected to the leachate collection tank, and then transported to the leachate treatment station for treatment, and discharged to the municipal sewage pipe network when the discharge standard is reached; S9：臭气收集及处理，通过引风机将S1-S8产生的臭气收集至生物滤池处理，达到排放标准通过尾气排放筒进行排放，处理车间设置植物液空间雾化喷淋系统和新风送风系统辅助除臭；S9: odor collection and treatment, the odor generated by S1-S8 is collected by the induced draft fan to the biological filter for treatment, and the emission standard is discharged through the exhaust gas discharge tube. The treatment workshop is equipped with a plant liquid space atomization spray system and fresh air supply. Air system to assist deodorization; 且S9产生的除臭废水与S1-S7产生的垃圾渗滤液均收集至渗滤液收集池，再输送至渗滤液处理站处理。And the deodorized wastewater produced by S9 and the landfill leachate produced by S1-S7 are collected in the leachate collection tank, and then transported to the leachate treatment station for treatment. 2.根据权利要求1所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，S2所述破碎是将生活垃圾破碎至粒径<200mm。2 . The method for emergency treatment of domestic waste in a domestic waste incineration power plant according to claim 1 , wherein the crushing in S2 is to crush the domestic waste to a particle size of less than 200 mm. 3 . 3.根据权利要求1所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，S4所述好氧生物反应的温度50～60℃，时间为10-15天。3 . The method for emergency treatment of domestic waste in a domestic waste incineration power plant according to claim 1 , wherein the temperature of the aerobic biological reaction in S4 is 50-60° C. and the time is 10-15 days. 4 . 且，所述生物菌种的投加量占生活垃圾体积的0.l～0.2‰。Moreover, the dosage of the biological strains accounts for 0.1 to 0.2‰ of the volume of the domestic garbage. 4.根据权利要求3所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，S4所述生物干化过程是通过生物干化池进行；4. a kind of emergency treatment method for household waste in a household waste incineration power plant according to claim 3, is characterized in that, the biological drying process described in S4 is carried out by biological drying pond; 其中，所述生物干化池为密闭构筑物，池高5～6m，池底设置有渗滤液收集池和通风沟；且供气由通风沟进入，渗透液流入通风沟集液管，并汇集至渗滤液收集池；Wherein, the biological drying tank is a closed structure with a height of 5-6m, and a leachate collection tank and a ventilation ditch are arranged at the bottom of the pool; and the air supply enters from the ventilation ditch, and the permeate flows into the ventilation ditch liquid collection pipe, and is collected to the Leachate collection tank; 其中，所述供气量每立方米垃圾为0.05～0.15m3空气/min，且氧含量在12～16％。Wherein, the air supply volume per cubic meter of garbage is 0.05-0.15m 3 air/min, and the oxygen content is 12-16%. 5.根据权利要求1所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，S8所述渗滤液收集及处理还设置有渗滤液处理站，渗滤液处理站包括：厌氧反应器和MBR系统；5. The method for emergency treatment of domestic waste in a domestic waste incineration power plant according to claim 1, wherein the leachate collection and treatment described in S8 is also provided with a leachate treatment station, and the leachate treatment station comprises: Anaerobic reactors and MBR systems; 其中，MBR系统包括均质池、两级A/O生化反应池及外置管式膜；Among them, the MBR system includes a homogeneous tank, a two-stage A/O biochemical reaction tank and an external tubular membrane; 所述厌氧反应器的有机污染物去除率≥80％。The organic pollutant removal rate of the anaerobic reactor is ≥80%. 6.根据权利要求1所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，S9所述生物滤池的臭气去除率≥90％，处理后的尾气达到排放标准且通过排气筒排放，排气筒距地面高度不低于15m。6. The method for emergency treatment of domestic waste in a domestic waste incineration power plant according to claim 1, wherein the odor removal rate of the biological filter in S9 is greater than or equal to 90%, and the treated tail gas meets the emission standard And it is discharged through the exhaust pipe, and the height of the exhaust pipe from the ground is not less than 15m. 7.根据权利要求1所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，S9所述新风送风系统通过送风机将室外空气送至处理车间合适位置，降低车间臭气浓度；7. The method for emergency treatment of household waste in a household waste incineration power plant according to claim 1, wherein the fresh air supply system described in S9 sends outdoor air to a suitable location in the processing workshop through a blower to reduce workshop odor gas concentration; 所述植物液空间雾化喷淋系统的植物液雾化喷头设置在散发臭气的臭源位置，定时喷洒植物液，改善作业环境。The plant liquid atomization nozzle of the plant liquid space atomization spray system is arranged at the odor source position that emits odor, and sprays the plant liquid regularly to improve the working environment. 8.根据权利要求1所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，其特征在于，S5所述压缩密度≥1.2t/m3。8 . The method for emergency treatment of domestic waste in a domestic waste incineration power plant according to claim 1 , wherein the compression density in S5 is greater than or equal to 1.2t/m 3 . 9.根据权利要求2-8任一所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，还包括：一次筛分，所述一次筛分在S3所述磁选操作之后，在S4所述生化干化处理之前进行。9. The method for emergency treatment of domestic waste in a domestic waste incineration power plant according to any one of claims 2 to 8, further comprising: primary screening, wherein the primary screening is performed after the magnetic separation operation in S3. S4 is carried out before the biochemical drying treatment. 10.根据权利要求9所述的一种用于生活垃圾焚烧发电厂生活垃圾应急处理方法，还包括：再次破碎和再次筛分；所述再次破碎和所述再次筛分依次在S4所述生化干化处理操作之后进行，且所述再次筛分操作完毕之后直接进行S6所述暂存操作。10. The method for emergency treatment of domestic waste for a domestic waste incineration power plant according to claim 9, further comprising: re-crushing and re-screening; The drying process is performed after the operation, and the temporary storage operation in S6 is directly performed after the re-screening operation is completed.
CN202110098806.9A 2021-01-25 2021-01-25 Household garbage emergency treatment method for household garbage incineration power plant Pending CN112879914A (en)

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Application publication date: 20210601