CN111853797B - Method for cooperatively treating kitchen waste by waste incineration plant - Google Patents
Method for cooperatively treating kitchen waste by waste incineration plant Download PDFInfo
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- CN111853797B CN111853797B CN202010802858.5A CN202010802858A CN111853797B CN 111853797 B CN111853797 B CN 111853797B CN 202010802858 A CN202010802858 A CN 202010802858A CN 111853797 B CN111853797 B CN 111853797B
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 54
- 238000004056 waste incineration Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 52
- 239000002351 wastewater Substances 0.000 claims abstract description 32
- 238000005191 phase separation Methods 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 238000005345 coagulation Methods 0.000 claims abstract description 11
- 230000015271 coagulation Effects 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 claims description 21
- 238000010248 power generation Methods 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 11
- 239000003546 flue gas Substances 0.000 claims description 11
- 238000000746 purification Methods 0.000 claims description 9
- 239000010791 domestic waste Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 6
- 238000002386 leaching Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000010779 crude oil Substances 0.000 claims description 4
- 238000004945 emulsification Methods 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 13
- 239000004519 grease Substances 0.000 abstract description 11
- 230000001804 emulsifying effect Effects 0.000 abstract description 6
- 238000005188 flotation Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000014594 pastries Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Images
Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- 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
-
- 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
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention provides a system and a method for cooperatively treating kitchen waste by a waste incineration plant, and aims to solve the problems of harmlessness, low reduction degree and poor economy of the conventional single kitchen waste treatment facility and the problems of high cooperative oil content of waste water in the conventional waste incineration cooperative treatment process of kitchen waste and the like. Solid residues generated after leachate in the garbage pool passes through the three-phase separation device enter the garbage pool, wastewater is treated in two paths, and a coagulation device and an air flotation device are sequentially arranged before the leachate enters a garbage leachate treatment system in the first path of wastewater treatment according to the flowing direction of the wastewater; in the second path of wastewater treatment, a homogenizing and emulsifying device and a filtering and impurity removing device are also arranged before the back-spraying device. The system mainly can solve the problem that the waste water treatment grease in the kitchen waste cooperative treatment process is high, simultaneously considers the cooperative advantage of utilizing a garbage power plant, realizes the recycling of the kitchen waste to the maximum extent, reduces the quantity and harmlessness to the maximum extent, reduces the treatment cost and realizes the economic operation.
Description
Technical Field
The invention relates to a solid waste treatment method, in particular to a method for cooperatively treating kitchen waste by a waste incineration plant.
Background
The kitchen waste is food residue of restaurants, unit canteens and the like and processing waste of fruits, vegetables, meat, grease, pastries and the like in the kitchen, and also comprises household kitchen waste. The water content of the kitchen waste is high and usually reaches more than 80%; rich in nutrients, such as starch, cellulose, protein, fat, inorganic salt and the like; the grease content is high, and generally reaches more than 2 percent of the weight of the kitchen waste. Due to the characteristic of high oil content, the kitchen waste is subjected to biological treatment to generate an inhibiting effect, so that the treatment difficulty is increased.
The main process of domestic kitchen waste treatment is 'pretreatment + grease extraction + anaerobic treatment + biogas utilization', the single kitchen waste treatment facility has the problem of biogas residue and biogas slurry treatment at present, and the anaerobic facility is high in investment cost and difficult to stably operate, so that a plurality of domestic kitchen waste treatment facilities are difficult to achieve high-standard harmless and reduction treatment, the recycling degree is not high, and the economy is poor. Calculated by 60-90m of methane prepared from each ton of kitchen waste, about 2 degrees can be generated by performing power generation after each cubic methane is purified, so that the generated energy of each ton of kitchen waste is about 150-200 degrees, which is lower than the generated energy of each ton of garbage generated by garbage incineration power generation by more than 400 degrees, but the investment cost per ton is equivalent to that of garbage incineration. Therefore, at present, domestic waste incineration manufacturers have considered to arrange kitchen pretreatment facilities in waste incineration plants to perform cooperative treatment of household waste and kitchen waste, so that the reduction, harmlessness and recycling degree of the kitchen waste is improved, and the treatment cost is reduced.
Typically, as a patent of 'a kitchen waste system treatment method' (application No. 201110238849.9), a method of 'pretreatment, regulation and pulping, anaerobic fermentation, biogas utilization and biogas residue treatment' is provided, wherein solid phase sundries generated by pretreatment and anaerobic treatment enter an incineration plant for cooperative treatment, waste heat of the incineration plant is used as a heat source for anaerobic fermentation, and wastewater reaches the standard through anaerobic treatment and biological treatment and is discharged. The patent 'a method for treating kitchen waste in a coordinated full-scale manner by a household garbage incineration plant' (application number 201610675440.6), proposes a method of 'solid-liquid separation + solid-phase incineration + liquid-phase coordination', wherein a solid-liquid separation system sends generated solids to an incineration system or enters a grease system, and grease is recovered from a liquid phase. The patent "city and countryside solid waste rubbish is integration processing system in coordination based on waste incineration device" (patent number 201910604511.7), proposes to arrange the scheme that contains multiple waste treatment such as kitchen waste at waste incineration plant platform lower part of unloading, to the processing of kitchen waste, the utilization of resource is not realized to the grease. The patent 'a kitchen waste power generation coprocessing system and method' (application number 201811079743.7), also provides the idea of 'pretreatment + grease purification + solid phase incineration + liquid phase coprocessing'.
The main problem of the existing cooperative treatment technology is that the wastewater generated by the pretreatment of the kitchen waste still has high oil content and cannot meet the water inlet requirement of a leachate treatment system of a waste incineration plant, at the moment, the pretreated wastewater and the leachate treatment system of the original waste incineration plant perform cooperative treatment, so that a large biological inhibition effect can be generated, the anaerobic system and the subsequent biochemical system of the waste incineration plant are affected, and the membrane treatment system is seriously blocked and cannot run. In addition, the existing kitchen waste and waste incineration plant cooperative treatment process does not fully consider the possibility and complexity of arranging a kitchen waste treatment system in the red line range of the waste incineration plant, and the kitchen waste pretreatment facility is difficult to implement due to the fact that the original waste incineration plant does not have enough space and construction land for arranging the kitchen waste pretreatment facility.
Disclosure of Invention
The invention provides a method for cooperatively treating kitchen waste by a waste incineration plant, aiming at solving the problems of harmlessness, low reduction degree and poor economy of the existing single kitchen waste treatment facility and the problems of high cooperative oil content of the waste water of the existing waste incineration cooperative treatment process of the kitchen waste and the like. Solid residues generated after leachate in the garbage pool passes through the three-phase separation device enter the garbage pool, wastewater is treated in two paths, and a coagulation device and an air flotation device are sequentially arranged before the leachate enters a garbage leachate treatment system in the first path of wastewater treatment according to the flowing direction of the wastewater; in the second path of wastewater treatment, a homogenizing and emulsifying device and a filtering and impurity removing device are also arranged before the back-spraying device. The system mainly can solve the problem that the waste water treatment grease in the kitchen waste cooperative treatment process is high, simultaneously considers the cooperative advantage of utilizing a garbage power plant, realizes the recycling of the kitchen waste to the maximum extent, reduces the quantity and harmlessness to the maximum extent, reduces the treatment cost and realizes the economic operation.
The technical scheme adopted by the invention for solving the technical problems is that a system for cooperatively treating kitchen wastes by a waste incineration plant comprises a waste pool, a three-phase separation device, a waste incineration power generation system, a waste leachate treatment system and a back-spraying device which play a role in cooperation, the kitchen wastes and the household wastes enter the waste pool, solid residues generated after leachate in the waste pool passes through the three-phase separation device enter the waste pool, waste water is treated in two ways, first waste water is treated by the waste leachate treatment system, second waste water is sprayed back to an incinerator of the waste incineration power generation system by the back-spraying device, crude oil generated after the kitchen wastes and the household wastes pass through the three-phase separation device is further purified or sold, the method is characterized in that a coagulation device and an air flotation device are sequentially arranged before entering a garbage leachate treatment system in the first path of wastewater treatment according to the flowing direction of wastewater; in the second path of wastewater treatment, a homogenizing and emulsifying device and a filtering and impurity removing device are also arranged before the back-spraying device,
the waste incineration power generation system mainly comprises a waste incinerator, a waste heat boiler, a turbine generator and a flue gas purification system arranged behind the waste incinerator and the waste heat boiler.
A method for cooperatively treating kitchen waste by a waste incineration plant further comprises the following steps:
1. transporting the kitchen waste and the household waste to the same waste pond,
2, after the garbage is fermented in the garbage pool for 3-5 days, the garbage is sent into a garbage incinerator for incineration so as to drive the steam turbine generator to generate electricity, the flue gas generated after the garbage incinerator is incinerated enters the flue gas purification system for flue gas purification,
3. the leachate generated by the garbage pool enters a three-phase separation device for solid, water and oil separation,
4. solid slag generated by three-phase separation enters a garbage pool, wastewater generated by three-phase separation is treated in two ways, the first way of wastewater is treated by the garbage leachate treatment system and is recycled or discharged after reaching the standard after being treated by the garbage leachate treatment system; the second path of waste water is sprayed back to the incinerator of the waste incineration power generation system through the back spraying device, and the crude grease generated by three-phase separation is further purified or sold,
the method is characterized in that after the step 4, the first path of wastewater enters a garbage leaching solution treatment system after being subjected to coagulation treatment and air floatation treatment in sequence, and solid residues and floating residues generated after the coagulation treatment and the air floatation treatment respectively enter a garbage pool; and the second path of wastewater enters the back spraying device after being subjected to homogeneous emulsification treatment and filtration impurity removal treatment in sequence.
The invention has the beneficial effects that: the invention provides a method for cooperatively treating kitchen waste by a waste incineration plant. Solid residues generated after leachate in the garbage pool passes through the three-phase separation device enter the garbage pool, wastewater is treated in two paths, and a coagulation device and an air flotation device are sequentially arranged before the leachate enters a garbage leachate treatment system in the first path of wastewater treatment according to the flowing direction of the wastewater; in the second path of wastewater treatment, a homogenizing and emulsifying device and a filtering and impurity removing device are also arranged before the back-spraying device. The system mainly can solve the problem that the waste water treatment grease in the kitchen waste cooperative treatment process is high, simultaneously considers the cooperative advantage of utilizing a garbage power plant, realizes the recycling of the kitchen waste to the maximum extent, reduces the quantity and harmlessness to the maximum extent, reduces the treatment cost and realizes the economic operation.
Drawings
Fig. 1 and fig. 2 are respectively a system layout diagram and a corresponding process flow diagram of a first embodiment of the present invention.
Detailed Description
Fig. 1 and fig. 2 are a system layout diagram and a corresponding process flow diagram of a first embodiment of the present invention. Fig. 1 shows that, in this example, a system for co-processing kitchen waste in a waste incineration plant includes a waste pool, a three-phase separation device, a waste incineration power generation system, a waste leachate processing system and a back-spraying device which exert a synergistic effect, kitchen waste and domestic waste enter the waste pool, solid residues generated after leachate in the waste pool passes through the three-phase separation device enter the waste pool, waste water is processed in two ways, a first path of kitchen waste water is processed by the waste leachate processing system, a second path of kitchen waste water is back-sprayed to an incinerator of the waste incineration power generation system through the back-spraying device, crude oil generated after the kitchen waste passes through the kitchen waste pretreatment system is further purified or sold, the method is characterized in that a coagulation device and an air flotation device are sequentially arranged before entering a garbage leachate treatment system in the first path of wastewater treatment according to the flowing direction of wastewater; in the second path of wastewater treatment, a homogenizing and emulsifying device and a filtering and impurity removing device are also arranged before the back-spraying device,
the waste incineration power generation system mainly comprises a waste incinerator, a waste heat boiler, a turbine generator and a flue gas purification system arranged behind the waste incinerator and the waste heat boiler.
Fig. 2 shows that the method for co-processing kitchen waste in a waste incineration plant further includes the following steps:
1. transporting the kitchen waste and the household waste to the same waste pond,
2. after the garbage is fermented in the garbage pool for 3-5 days, the garbage is sent into a garbage incinerator for incineration so as to drive the steam turbine generator to generate electricity, the flue gas generated after the garbage incinerator is incinerated enters the flue gas purification system for flue gas purification,
3. the leachate generated by the garbage pool enters a three-phase separation device for solid, water and oil separation,
4. solid residues generated by three-phase separation enter a garbage pool, wastewater generated by three-phase separation is treated in two ways, the first way of kitchen wastewater is treated by the garbage leachate treatment system and is recycled or discharged after reaching the standard after being treated by the garbage leachate treatment system; the second path of kitchen waste water is sprayed back to the incinerator of the waste incineration power generation system through the back spraying device, the crude oil generated by three-phase separation is further purified or sold,
the method is characterized in that after the step 4, the first path of wastewater sequentially passes through the coagulation device and the air floatation device and then enters a garbage leaching solution treatment system, and solid residues generated after passing through the coagulation device and the air floatation device respectively enter an incinerator of a garbage incineration power generation system; the second path of wastewater enters the back-spraying device after sequentially passing through the homogenizing and emulsifying device and the filtering and impurity removing device.
Claims (1)
1. A method for cooperatively treating kitchen waste by a waste incineration plant further comprises the following steps:
(1) transporting the kitchen waste and the household waste to the same waste pool;
(2) after the garbage is fermented in the garbage pool for 3-5 days, the garbage is sent into a garbage incinerator for incineration so as to drive a steam turbine generator to generate power, and flue gas generated after the garbage incinerator is incinerated enters a flue gas purification system for flue gas purification;
(3) the leachate generated by the garbage pool enters a three-phase separation device for solid, water and oil separation;
(4) solid residues generated by three-phase separation enter a garbage pool, wastewater generated by three-phase separation is treated in two ways, the first way of wastewater is treated by the garbage leaching solution treatment system, and the wastewater is recycled or discharged after reaching the standard after being treated by the garbage leaching solution treatment system; the second path of waste water is sprayed back to an incinerator of the waste incineration power generation system through a back-spraying device, and crude oil generated by three-phase separation is further purified or sold;
the method is characterized in that after the step (4), the first path of wastewater enters a garbage leaching solution treatment system after being subjected to coagulation treatment and air floatation treatment in sequence, and solid residues and floating residues generated after the coagulation treatment and the air floatation treatment respectively enter a garbage pool; and the second path of wastewater enters the back spraying device after being subjected to homogeneous emulsification treatment and filtration impurity removal treatment in sequence.
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| CN202010802858.5A CN111853797B (en) | 2020-08-11 | 2020-08-11 | Method for cooperatively treating kitchen waste by waste incineration plant |
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| WO2022032481A1 (en) * | 2020-08-11 | 2022-02-17 | 桂林市深能环保有限公司 | System and method for cooperatively treating kitchen waste in garbage incineration plant |
| CN115807943A (en) * | 2021-09-14 | 2023-03-17 | 淮安零碳能源环保科技有限公司 | Production system for waste incineration power generation |
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| CN213237536U (en) * | 2020-08-11 | 2021-05-18 | 桂林市深能环保有限公司 | System for co-processing kitchen waste in waste incineration plant |
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| CN111853797A (en) | 2020-10-30 |
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Address after: 541000 Shankou domestic waste sanitary landfill, Shuikou village, Lingui Town, Lingui District, Guilin City, Guangxi Zhuang Autonomous Region Applicant after: Guilin Shenneng environmental protection Co.,Ltd. Applicant after: Chaozhou Shenneng environmental protection Co.,Ltd. Applicant after: Shenzhen Energy and environmental protection Co.,Ltd. Applicant after: Shenzhen Shenneng environmental protection East Co.,Ltd. Applicant after: Shenzhen Shenneng Environmental Protection City Environmental Service Co.,Ltd. Applicant after: WUHAN SHENNENG ENVIRONMENTAL PROTECTION NEW DITCH WASTE POWER GENERATION Co.,Ltd. Applicant after: Shanxian Shenneng environmental protection Co.,Ltd. Address before: 541000 Shankou domestic waste sanitary landfill, Shuikou village, Lingui Town, Lingui District, Guilin City, Guangxi Zhuang Autonomous Region Applicant before: Guilin Shenneng environmental protection Co.,Ltd. Applicant before: Chaozhou Shenneng environmental protection Co.,Ltd. Applicant before: SHENZHEN ENERGY ENVIRONMENTAL ENGINEERING Co.,Ltd. Applicant before: Shenzhen Shenneng environmental protection East Co.,Ltd. Applicant before: Shenzhen Shenneng Environmental Protection City Environmental Service Co.,Ltd. Applicant before: WUHAN SHENNENG ENVIRONMENTAL PROTECTION NEW DITCH WASTE POWER GENERATION Co.,Ltd. Applicant before: Shanxian Shenneng environmental protection Co.,Ltd. |
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