CN211921208U - Landfill leachate treatment system suitable for cement kiln - Google Patents
Landfill leachate treatment system suitable for cement kiln Download PDFInfo
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- CN211921208U CN211921208U CN201922281182.5U CN201922281182U CN211921208U CN 211921208 U CN211921208 U CN 211921208U CN 201922281182 U CN201922281182 U CN 201922281182U CN 211921208 U CN211921208 U CN 211921208U
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Abstract
The utility model discloses a landfill leachate processing system suitable for cement kiln, the system includes the refuse storage storehouse, burns burning furnace, dore furnace, filtration liquid processing system, the refuse storage storehouse links to each other with the solid refuse import that burns burning furnace and filtration liquid processing system's liquid waste import respectively, the refuse storage storehouse transports solid refuse to burning furnace processing, the refuse storage storehouse transports liquid waste to filtration liquid processing system and handles, its characterized in that still includes blender, concentrated ammonia water jar and dechlorination medicament jar, filtration liquid processing system passes through the liquid waste import of liquid pipeline with the blender and links to each other, the mixed liquid export of blender links to each other with the dore furnace. The utility model discloses a concentrated filtration liquid of three branch roads collaborative or independent processing, the innocent treatment problem of more effectual solution filtration liquid has improved the stability of system simultaneously.
Description
Technical Field
The utility model relates to a solid liquid waste treatment field, in particular to landfill leachate processing system suitable for cement kiln.
Background
The stock of municipal solid waste in China reaches 60 hundred million tons, 5 hundred million square meters of cultivated land is occupied, and the problem of municipal solid waste disposal becomes the focus of attention of all people. The conventional techniques such as landfill, composting, incineration and the like have limited development due to their inherent disadvantages. At present, although a plurality of domestic waste incineration power plants developed in cities achieve certain achievements in the aspects of waste volume reduction, energy utilization and the like, the problem of dioxin pollution caused by incineration causes disputes of people on waste incineration modes. The cement kiln has the characteristics of large system capacity, high working temperature and the like, and has good capacity of containing and degrading wastes generated after the wastes are combusted, so that the cement kiln can be used for cooperatively treating the wastes and can be transported. Similar to the pretreatment process of a garbage power plant, the garbage is required to be stored and fermented in a storage pit after entering the plant so as to improve the self heat value of the garbage, and the water drained from the garbage in the storage process is leachate. The percolate is a yellow brown or black organic wastewater with foul smell. At present, domestic garbage is not effectively classified, the garbage components are complex, and leachate contains a large amount of refractory organic matters, inorganic salts, harmful elements and the like. In recent years, domestic landfill leachate pollution events tend to be frequent, and leachate pollution events occur in Xian, Anhui, Guangxi, Shenzhen and the like. The safe disposal and effective management of landfill leachate have become an important issue for environmental protection departments and related management units.
In order to prevent the pollution risk of the landfill leachate, the GB18485-2014 'control standard for domestic garbage incineration pollution' stipulates that the landfill leachate meets the discharge standards of CODCr less than or equal to 100mg/L, BOD5 less than or equal to 30mg/L, NH4+ -N less than or equal to 25mg/L and the like. The conventional treatment technology of the landfill leachate comprises a biochemical method, a thermal evaporation technology, a back-spraying incineration method and other processes. The thermal evaporation technology has high equipment and disposal cost, and has the problems of residue disposal and scaling; the back-spraying incineration method is greatly influenced by the heat value of garbage and the furnace condition, the disposal quantity of the membrane concentrated solution is unstable, and the influence on the stability of the furnace condition and the waste heat generating capacity of the kiln tail is large. In the cement kiln coprocessing waste system, the furnace of waste incinerator sprays cooling, kiln line denitration and processes such as desulfurization all need to consume the water, if carry out certain degree after concentrated with landfill leachate, replace this part water with the leachate concentrate, can not only reduce the water consumption, reduce the plant area water cost, can also solve the innocent treatment problem of leachate, realize that leachate "treats waste with the waste" in engineering application.
SUMMERY OF THE UTILITY MODEL
In order to realize the above-mentioned purpose, the utility model provides a landfill leachate processing system suitable for cement kiln, including garbage storage storehouse, burning furnace, dore furnace, filtration liquid processing system, the garbage storage storehouse links to each other with the solid refuse import of burning furnace and filtration liquid processing system's liquid rubbish import respectively, the garbage storage storehouse transports solid rubbish to burning furnace treatment, the garbage storage storehouse transports liquid rubbish to filtration liquid processing system and handles, still includes blender, concentrated ammonia water jar and dechlorination medicament jar, filtration liquid processing system passes through the liquid pipeline and links to each other with the liquid rubbish import of blender, the mixed liquid export of blender links to each other with the dore furnace.
Further, a liquid outlet of the percolate treatment system is connected with a liquid garbage inlet of the incinerator through a pipeline.
Further, a liquid outlet of the percolate treatment system is connected with a liquid garbage inlet of the decomposing furnace through a pipeline.
Further, the mixer is respectively connected with the concentrated ammonia water tank and the dechlorination medicament tank.
Further, the leachate system comprises a leachate tank, a leachate biochemical-membrane treatment device and a membrane filtration concentrated solution tank, wherein an inlet of the leachate tank is connected with the garbage storage, the leachate tank is sequentially connected with the leachate biochemical-membrane treatment device and the membrane filtration concentrated solution tank, and an outlet of the membrane filtration tank is connected with a liquid outlet pipeline.
Furthermore, the inlet of the mixer is provided with a first valve which can control the liquid to flow into the mixer.
Furthermore, a second valve is arranged at a liquid garbage inlet of the incinerator and can control liquid to flow into the incinerator.
Furthermore, a third valve is arranged at a liquid garbage inlet of the decomposing furnace, and the third valve can control liquid to flow into the decomposing furnace.
The utility model has the advantages as follows:
1. after the concentrated leachate, concentrated ammonia water and a dechlorinating agent are forcibly mixed by a mixer to remove part of chloride ions, the concentrated leachate is sent into a decomposing furnace for denitration treatment, wet garbage is effectively treated, the leachate replaces process water for furnace hearth spraying cooling, kiln line denitration and the like of an incinerator, clean water is replaced by the leachate, the using amount of conventional clean water is reduced, the purpose of 'treating waste by waste' in engineering application of the leachate is realized, and considerable economic and environmental benefits are generated.
2. Concentrated leachate is treated by three branches in a synergistic or independent mode, the problem of harmless treatment of the leachate is solved more effectively, and the stability of the system is improved.
Drawings
FIG. 1 is a process flow diagram of a landfill leachate disposal system suitable for use in a cement kiln;
shown in the figure: 1-a waste storage; 2-an incinerator; 3-decomposing furnace; 4-leachate treatment system; 5-a mixer; 6-strong ammonia water tank; 7-dechlorination agent tank; 8-percolation liquid pool; 9-leachate biochemical-membrane treatment device; 10-membrane filtration concentrated solution pool; 11-a first valve; 12-a second valve; 13-a third valve;
Detailed Description
To explain the technical content of the present invention in detail, the present invention will be further explained with reference to the accompanying drawings.
1. As shown in fig. 1, the utility model relates to a landfill leachate processing system suitable for cement kiln, the main part of this system includes rubbish storehouse 1, burns burning furnace 2, dore furnace 3, filtration liquid processing system 4, rubbish storehouse 1 links to each other with the solid refuse import that burns burning furnace 2 and the liquid refuse import of filtration liquid processing system 4 respectively, rubbish storehouse 1 transports solid refuse to burning furnace 2 and handles, rubbish storehouse 1 transports liquid refuse to filtration liquid processing system 4 and handles, this system still includes blender 5, concentrated ammonia water jar 6 and dechlorination medicament jar 7, filtration liquid processing system 4 links to each other through the liquid refuse import of liquid pipeline with blender 5, blender 5 links to each other with concentrated ammonia water jar 6 and dechlorination medicament jar 7 respectively, the mixed liquid export of blender 5 links to each other with dore furnace 3.
The percolate system 4 comprises a percolate pool 8, a percolate biochemical-membrane treatment device 9 and a membrane filtration concentrated solution pool 10, wherein an inlet of the percolate pool 8 is connected with the garbage storage 1, the percolate pool 8 is sequentially connected with the percolate biochemical-membrane treatment device 9 and the membrane filtration concentrated solution pool 10, and an outlet of the membrane filtration pool 10 is connected with a liquid outlet pipeline.
The liquid outlet of the percolate treatment system 4 is connected with the liquid garbage inlet of the incinerator 2 through a pipeline. The liquid outlet of the percolate treatment system 4 is connected with the liquid garbage inlet of the decomposing furnace 3 through a pipeline.
The inlet of the mixer 5 is provided with a first valve 11, and the first valve 11 can control the liquid to flow into the mixer 5. A second valve 12 is arranged at the liquid garbage inlet of the incinerator 2, and the second valve 12 can control the liquid to flow into the incinerator 2. A third valve 13 is arranged at the liquid garbage inlet of the decomposing furnace 3, and the third valve 13 can control the liquid to flow into the decomposing furnace 3.
The process flow of the utility model comprises the following steps:
A. dry garbage enters the incinerator 2 from the garbage storage 1 to be incinerated, wet garbage enters the percolate pool 8 from the garbage storage 1, and then is treated by the percolate biochemical-membrane treatment device 9 to realize percolate reduction, and the percolate enters the membrane filtration concentrated solution pool 10.
B. Concentrated percolate of the membrane filtration concentrated solution pool 10 enters the mixer 5 through the first valve 11 under the action of the pump, is mixed with concentrated ammonia water and a chlorine removal medicament in the mixer 5, and mixed solution after partial chloride ions are removed enters the decomposing furnace 3 for SNCR denitration.
C. When the temperature in the incinerator 2 is too high, the second valve 12 is opened, and part of the concentrated percolate is sprayed into the incinerator 1 to cool the incinerator 1.
D. When the amount of the concentrated percolate is large, so that the mixer 5 and the incinerator 2 are not enough to consume all the concentrated percolate, the third valve 13 is opened, and the rest concentrated percolate is atomized and sent to the decomposing furnace 3 for incineration treatment.
Claims (8)
1. The garbage leachate treatment system suitable for the cement kiln comprises a garbage storage bank (1), an incinerator (2), a decomposing furnace (3) and a leachate treatment system (4), wherein the garbage storage bank (1) is respectively connected with a solid garbage inlet of the incinerator (2) and a liquid garbage inlet of the leachate treatment system (4), the garbage storage bank (1) transports solid garbage to the incinerator (2) for treatment, the garbage storage bank (1) transports liquid garbage to the leachate treatment system (4) for treatment, the garbage leachate treatment system is characterized by further comprising a mixer (5), a concentrated ammonia water tank (6) and a dechlorination medicament tank (7), the leachate treatment system (4) is connected with the liquid garbage inlet of the mixer (5) through a liquid pipeline, and a mixed liquid outlet of the mixer (5) is connected with the decomposing furnace (3).
2. The landfill leachate treatment system according to claim 1, wherein the liquid outlet of the leachate treatment system (4) is connected to the liquid landfill inlet of the incinerator (2) through a pipe.
3. The landfill leachate treatment system according to claim 1, wherein the liquid outlet of the leachate treatment system (4) is connected to the liquid landfill inlet of the decomposing furnace (3) through a pipe.
4. The landfill leachate treatment system suitable for use in cement kilns according to claim 1, wherein the mixer (5) is connected to the concentrated ammonia water tank (6) and the chlorine removal agent tank (7), respectively.
5. The landfill leachate treatment system according to any of the claims 1 to 4, wherein the leachate treatment system (4) comprises a leachate tank (8), a leachate biochemical-membrane treatment unit (9) and a membrane filtrate concentrate tank (10), wherein the inlet of the leachate tank (8) is connected to the landfill (1), the leachate tank (8) is in turn connected to the leachate biochemical-membrane treatment unit (9) and the membrane filtrate concentrate tank (10), and the outlet of the membrane filtrate concentrate tank (10) is connected to a liquid outlet pipe.
6. The landfill leachate disposal system according to claim 1, wherein the inlet of the mixer (5) is provided with a first valve (11), and the first valve (11) controls the liquid flow into the mixer (5).
7. The landfill leachate disposal system suitable for use in cement kilns as set forth in claim 2, wherein the liquid garbage inlet of the incinerator (2) is provided with a second valve (12), and the second valve (12) controls the flow of liquid into the incinerator (2).
8. The landfill leachate disposal system according to claim 3, wherein the decomposing furnace (3) is provided with a third valve (13) at the liquid landfill inlet, and the third valve (13) can control the liquid flow into the decomposing furnace (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922281182.5U CN211921208U (en) | 2019-12-18 | 2019-12-18 | Landfill leachate treatment system suitable for cement kiln |
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| CN201922281182.5U CN211921208U (en) | 2019-12-18 | 2019-12-18 | Landfill leachate treatment system suitable for cement kiln |
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| CN211921208U true CN211921208U (en) | 2020-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981100A (en) * | 2019-12-18 | 2020-04-10 | 南京凯盛开能环保能源有限公司 | Landfill leachate disposal system and method suitable for cement kiln |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981100A (en) * | 2019-12-18 | 2020-04-10 | 南京凯盛开能环保能源有限公司 | Landfill leachate disposal system and method suitable for cement kiln |
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