CN212504410U - Garbage leachate waste heat method zero discharge device for garbage power plant - Google Patents
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- CN212504410U CN212504410U CN202020400755.1U CN202020400755U CN212504410U CN 212504410 U CN212504410 U CN 212504410U CN 202020400755 U CN202020400755 U CN 202020400755U CN 212504410 U CN212504410 U CN 212504410U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 57
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 238000001704 evaporation Methods 0.000 claims abstract description 40
- 230000008020 evaporation Effects 0.000 claims abstract description 39
- 239000010865 sewage Substances 0.000 claims abstract description 15
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- 239000010881 fly ash Substances 0.000 claims abstract description 8
- 239000000149 chemical water pollutant Substances 0.000 claims abstract 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 13
- 238000002425 crystallisation Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000002351 wastewater Substances 0.000 claims description 12
- 230000008025 crystallization Effects 0.000 claims description 11
- 238000000855 fermentation Methods 0.000 claims description 10
- 230000004151 fermentation Effects 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 10
- 230000008023 solidification Effects 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910021389 graphene Inorganic materials 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 claims description 3
- 230000009920 chelation Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000005325 percolation Methods 0.000 claims 2
- 238000011084 recovery Methods 0.000 claims 2
- 239000011550 stock solution Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract 1
- 239000003570 air Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000011010 flushing procedure Methods 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Landfill leachate waste heat method zero release device of refuse power plant belongs to rubbish power generation and sewage zero release technical field. Aiming at the problem that the garbage leachate of the garbage power plant is generally sent into an incinerator to be burnt, so that the steam yield and the stability of the combustion process in the incinerator are seriously influenced, the waste leachate after pretreatment is evaporated and concentrated or crystallized by a waste heat evaporator to obtain salt, and the concentrated solution or the crystallized salt and fly ash are solidified and buried; the driving heat source of the waste heat evaporator can be main steam or steam extracted by a steam turbine, and condensed water of the waste heat evaporator returns to the deaerator; the driving heat source can also be the waste heat of the smoke exhaust high-temperature section recovered by a low-low temperature economizer; the secondary steam after the evaporation of the sewage of the waste heat evaporator is used for preheating boiler feed water in front of a deaerator or combustion-supporting air of an incinerator; the secondary condensed water is used as raw water of desalted water or circulating water of a cooling tower for supplementing water; therefore, the heat energy used for evaporating the percolate returns to the main process thermal process again, and the heat source cost is close to zero.
Description
Technical Field
The invention relates to a waste leachate waste heat method zero discharge device for a refuse power plant, and belongs to the technical field of refuse power generation and sewage zero discharge.
Background
The garbage power plant becomes an important infrastructure for consuming urban garbage and biomass waste, is popularized on a large scale at present, but the treatment difficulty of garbage leachate existing in large quantity is high, the garbage leachate is generally pretreated and then sent into a membrane concentration device for concentration at present, the water yield is generally only 40% -60%, concentrated water is finally sprayed into a garbage incinerator for vaporization, the combustion deterioration is often caused, particularly, the steam yield of the incinerator is greatly reduced, the power generation capacity of a steam turbine is seriously influenced, and the operation cost is very high. The generation amount and the discharge amount of other main process sewage in the plant, such as concentrated desalted water, sewage discharged by a cooling tower, flushing water and the like, are large, so that the large waste of water resources is caused.
Meanwhile, as an infrastructure for environment-friendly treatment of solid wastes, a garbage power plant has inevitable requirements and trends for cleaning the production process, particularly zero discharge of sewage and backwater water resources.
Disclosure of Invention
The invention aims to solve the problems of the garbage power plant, adopts a novel waste heat evaporation and crystallization method and measures to realize evaporation concentration, crystallization and harmlessness of garbage leachate and other sewage in the plant, and provides technical conditions for realizing a clean and waste-free garbage power plant.
The specific description of the invention is: the garbage leachate waste heat method zero discharge device of the garbage power plant comprises a garbage leachate pretreatment module, a waste heat evaporation and concentration crystallization module, a waste heat recycling module of secondary steam and a utilization and disposal device of byproducts, wherein the specific process system comprises the following steps: the inlet of the percolate G2 of the waste water evaporation pretreatment pool 8a of the waste heat evaporation concentration crystallization module 8 is connected with the outlet of the main process percolate G4 of the membrane concentration device 4b of the main process sewage concentration module 4 or is communicated with the outlet of the percolate stock G0 from the garbage fermentation pool 1d, the waste water evaporation pretreatment pool 8a is also provided with the inlets of other high-concentration water G1 and the feed inlet of a medicament G3, and the outlet of the percolate treatment liquid G5 of the waste water evaporation pretreatment pool 8a is connected with the feed liquid inlet of the waste heat evaporation crystallizer 8 b; a driving heat source of the waste heat evaporation crystallizer 8b adopts a driving steam type, at the moment, an inlet of driving steam Q3 is communicated with an outlet of main steam Q1 of the garbage incinerator 1 or a steam extraction outlet of a steam turbine, and driving steam condensate C1 is connected with a water inlet pipe of boiler feed water S and a water inlet of the deaerator 2; or the driving heat source adopts a high-temperature hot water type, at the moment, the inlet of the driving heat source water supply R1 is connected with the waste heat circulating water outlet of the middle-temperature section flue gas heat recoverer 6, and the outlet of the driving heat source water return R2 is connected with the waste heat circulating water inlet of the middle-temperature section flue gas heat recoverer 6; an outlet of secondary steam Q2 of the waste heat evaporation crystallizer 8b is connected with a high-temperature side inlet of a secondary steam heat recoverer 3 or connected with a high-temperature side inlet of a boiler feed water preheater 7, when the outlet is connected with the high-temperature side inlet of the secondary steam heat recoverer 3, an air inlet of the secondary steam heat recoverer 3 is communicated with an air outlet of the garbage fermentation tank 1d, and the air outlet is communicated with an air inlet of the main process air preheater 1 c; when the outlet of the secondary steam Q2 of the waste heat evaporation crystallizer 8b is connected with the high-temperature side inlet of the boiler feed water preheater 7, the low-temperature side inlet of the boiler feed water preheater 7 is communicated with a mixed water supply pipe for driving steam condensate C1 and boiler feed water S, and the low-temperature side outlet is connected with the water inlet of the deaerator 2; the outlet of the secondary condensed water QN of the waste heat evaporative crystallizer 8b is communicated with a process raw water pipe in a factory; the high-concentration water or the crystallized salt NC of the waste heat evaporation crystallizer 8b and the fly ash D of the dust remover 1f are communicated with the feed inlet of the solidification device 5.
The feed liquid inlet of the membrane concentration device 4b is connected with the water outlet of the garbage leachate biochemical tank 4a, and the water inlet of the garbage leachate biochemical tank 4a is communicated with the leachate stock G0 outlet of the garbage fermentation tank 1 d.
The waste heat evaporative crystallizer 8b adopts a graphene vertical anti-scaling evaporative heat exchange and salt separation crystallization structure.
The medium-temperature flue gas heating surface 1a, the medium-low temperature flue gas heating surface 1b, the secondary steam heat recoverer 3 and the medium-temperature section flue gas heat recoverer 6 are of an extrusion-molded aluminum fin heat exchange tube structure coated with a graphene material.
The solidification device 5 adopts a fly ash chelation solidification facility or a ceramsite granulation device.
The invention has the following beneficial effects: one is as follows: the production process of the waste incineration power generation system realizes clean process control in the aspect of sewage treatment, and fundamentally solves the problems of treatment of waste water in waste leachate and other production and sewage discharge. The second is that: a large amount of garbage leachate does not need to be sprayed into the incinerator, so that the steam production and the stability of the combustion process of the incinerator are obviously improved, and the heat efficiency and the power generation capacity of the garbage incinerator can be improved by 10-20%. The third step is that: the solid in the wastewater is finally solidified to realize harmlessness and even reclamation. The fourth step is that: a large amount of condensed water can be reused for raw process water in a factory, heating, supplementing water and the like. The fifth step is: the waste heat drive-based sewage zero discharge method fundamentally solves the problems of high running cost and the like of environmental protection treatment, and can generate remarkable energy-saving benefit, so that the whole clean production system is built and used. The sixth is: by adopting a modular design method and an integrated structure, the method reduces the occupied area, investment and construction period to the maximum extent, improves the intellectualization of operation control and reduces the workload of operation, maintenance and management.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
The parts in fig. 1 are numbered and named as follows.
The system comprises a garbage incinerator 1, a medium-temperature flue gas heating surface 1a, a medium-low temperature flue gas heating surface 1b, a main process air preheater 1C, a garbage fermentation tank 1D, an air blower 1E, a dust remover 1f, a draught fan 1G, a deaerator 2, a secondary steam heat recoverer 3, a main process sewage concentration module 4, a garbage leachate biochemical tank 4a, a membrane concentration device 4b, a solidification device 5, a medium-temperature section flue gas heat recoverer 6, a boiler feed water preheater 7, a waste heat evaporation concentration crystallization module 8, a waste water evaporation pretreatment tank 8a, a waste heat evaporation crystallizer 8b, ambient air A0, preheating incinerator combustion-supporting air A1, driving steam condensed water C1, fly ash D, building material raw material or landfill solid waste E, leachate raw liquid G0, other high-concentration water G1, percolate raw liquid G2, a medicament G3, main process leachate G4, leachate G5, high-concentration treatment liquid G5, high-concentration water or salt NC, The system comprises main steam Q1, secondary steam Q2, driving steam Q3, condensed water QN, driving heat source water supply R1, driving heat source water return R2 and boiler water supply S.
Detailed Description
FIG. 1 is a system schematic and embodiment of the present invention.
The following is a specific example 1 of the present invention.
The garbage leachate waste heat method zero discharge device of the garbage power plant comprises a garbage leachate pretreatment module, a waste heat evaporation and concentration crystallization module, a waste heat recycling module of secondary steam and a utilization and disposal device of byproducts, wherein the specific process system comprises the following steps: the inlet of the percolate G2 of the waste water evaporation pretreatment pool 8a of the waste heat evaporation concentration crystallization module 8 is connected with the outlet of the main process percolate G4 of the membrane concentration device 4b of the main process sewage concentration module 4 or is communicated with the outlet of the percolate stock G0 from the garbage fermentation pool 1d, the waste water evaporation pretreatment pool 8a is also provided with the inlets of other high-concentration water G1 and the feed inlet of a medicament G3, and the outlet of the percolate treatment liquid G5 of the waste water evaporation pretreatment pool 8a is connected with the feed liquid inlet of the waste heat evaporation crystallizer 8 b; a driving heat source of the waste heat evaporation crystallizer 8b adopts a driving steam type, at the moment, an inlet of driving steam Q3 is communicated with an outlet of main steam Q1 of the garbage incinerator 1 or a steam extraction outlet of a steam turbine, and driving steam condensate C1 is connected with a water inlet pipe of boiler feed water S and a water inlet of the deaerator 2; or the driving heat source adopts a high-temperature hot water type, at the moment, the inlet of the driving heat source water supply R1 is connected with the waste heat circulating water outlet of the middle-temperature section flue gas heat recoverer 6, and the outlet of the driving heat source water return R2 is connected with the waste heat circulating water inlet of the middle-temperature section flue gas heat recoverer 6; an outlet of secondary steam Q2 of the waste heat evaporation crystallizer 8b is connected with a high-temperature side inlet of a secondary steam heat recoverer 3 or connected with a high-temperature side inlet of a boiler feed water preheater 7, when the outlet is connected with the high-temperature side inlet of the secondary steam heat recoverer 3, an air inlet of the secondary steam heat recoverer 3 is communicated with an air outlet of the garbage fermentation tank 1d, and the air outlet is communicated with an air inlet of the main process air preheater 1 c; when the outlet of the secondary steam Q2 of the waste heat evaporation crystallizer 8b is connected with the high-temperature side inlet of the boiler feed water preheater 7, the low-temperature side inlet of the boiler feed water preheater 7 is communicated with a mixed water supply pipe for driving steam condensate C1 and boiler feed water S, and the low-temperature side outlet is connected with the water inlet of the deaerator 2; the outlet of the secondary condensed water QN of the waste heat evaporative crystallizer 8b is communicated with a process raw water pipe in a factory; the high-concentration water or the crystallized salt NC of the waste heat evaporation crystallizer 8b and the fly ash D of the dust remover 1f are communicated with the feed inlet of the solidification device 5.
The feed liquid inlet of the membrane concentration device 4b is connected with the water outlet of the garbage leachate biochemical tank 4a, and the water inlet of the garbage leachate biochemical tank 4a is communicated with the leachate stock G0 outlet of the garbage fermentation tank 1 d.
The waste heat evaporative crystallizer 8b adopts a graphene vertical anti-scaling evaporative heat exchange and salt separation crystallization structure.
The medium-temperature flue gas heating surface 1a, the medium-low temperature flue gas heating surface 1b, the secondary steam heat recoverer 3 and the medium-temperature section flue gas heat recoverer 6 are of an extrusion-molded aluminum fin heat exchange tube structure coated with a graphene material.
The solidification device 5 adopts a fly ash chelation solidification facility or a ceramsite granulation device.
It should be noted that the present invention provides a technical implementation manner of waste leachate treatment and zero emission of waste incineration power generation system, and provides a specific implementation method, a flow and an implementation device how to achieve the above-mentioned objects, and according to this overall solution, there may be different specific implementation measures and different structure of the specific implementation device, the above-mentioned specific implementation manner is only one of them, and any other similar simple modified implementation manners, such as adopting different heat exchanger structures, simple changes of the front and back order of some sewage treatment devices, etc.; adopting different water quality treatment equipment and methods; different heat exchange element structures and simple deformation thereof are adopted; or to make modifications and the like as would occur to those of ordinary skill in the art, or to apply the same or similar structure to different fuel types, and the like, and other similar applications, all falling within the scope of the present invention.
Claims (5)
1. Landfill leachate waste heat method zero release device of refuse power plant, its characterized in that: the garbage leachate waste heat method zero emission device of the garbage power plant comprises a garbage leachate pretreatment module, a waste heat evaporation and concentration crystallization module, a waste heat recycling module of secondary steam and a utilization and disposal device of byproducts, wherein the specific process system is as follows: the inlet of the percolation liquid (G2) of the waste water evaporation pretreatment pool (8a) of the waste heat evaporation concentration crystallization module (8) is connected with the outlet of the main process leachate drainage (G4) of the membrane concentration device (4b) of the main process sewage concentration module (4), or is communicated with the outlet of the leachate stock solution (G0) from the garbage fermentation pool (1d), the waste water evaporation pretreatment pool (8a) is also provided with the inlets of other high-concentration water (G1) and the feeding port of a medicament (G3), and the outlet of the percolation treatment liquid (G5) of the waste water evaporation pretreatment pool (8a) is connected with the liquid inlet of the waste heat evaporation crystallizer (8 b); a driving heat source of the waste heat evaporation crystallizer (8b) adopts a driving steam type, at the moment, an inlet of the driving steam (Q3) is communicated with an outlet of main steam (Q1) of the garbage incinerator (1) or a steam extraction outlet of a steam turbine, and driving steam condensate (C1) is connected with a water inlet pipe of boiler feed water (S) and a water inlet of the deaerator (2); or the driving heat source adopts a high-temperature hot water type, at the moment, the inlet of the driving heat source water supply (R1) is connected with the waste heat circulating water outlet of the medium-temperature section flue gas heat recoverer (6), and the outlet of the driving heat source backwater (R2) is connected with the waste heat circulating water inlet of the medium-temperature section flue gas heat recoverer (6); an outlet of secondary steam (Q2) of the waste heat evaporation crystallizer (8b) is connected with a high-temperature side inlet of a secondary steam heat recoverer (3) or connected with a high-temperature side inlet of a boiler feed water preheater (7), when the outlet is connected with the high-temperature side inlet of the secondary steam heat recoverer (3), an air inlet of the secondary steam heat recoverer (3) is communicated with an air outlet of a garbage fermentation tank (1d), and the air outlet is communicated with an air inlet of a main process air preheater (1 c); when the outlet of the secondary steam (Q2) of the waste heat evaporation crystallizer (8b) is connected with the high-temperature side inlet of the boiler feed water preheater (7), the low-temperature side inlet of the boiler feed water preheater (7) is communicated with a mixed water supply pipe for driving steam condensate (C1) and boiler feed water (S), and the low-temperature side outlet is connected with the water inlet of the deaerator (2); the outlet of the secondary condensed water (QN) of the waste heat evaporation crystallizer (8b) is communicated with a process raw water pipe in the factory; the high-concentration water or the crystallized salt (NC) of the waste heat evaporation crystallizer (8b) and the fly ash (D) of the dust remover (1f) are communicated with the feed inlet of the solidification device (5).
2. The refuse power plant landfill leachate waste heat method zero emission device of claim 1, characterized in that the feed liquid inlet of the membrane concentration device (4b) is connected with the water outlet of the refuse leachate biochemical tank (4a), and the water inlet of the refuse leachate biochemical tank (4a) is communicated with the leachate stoste (G0) outlet of the refuse fermentation tank (1 d).
3. The landfill leachate waste heat method zero emission device of claim 1, characterized in that the waste heat evaporation crystallizer (8b) adopts a graphene vertical anti-scaling evaporation heat exchange and salt separation crystallization structure.
4. The landfill leachate waste heat method zero emission device of claim 1, characterized in that the tail heating surface of the garbage incinerator (1) comprises a medium temperature flue gas heating surface (1a) and a medium and low temperature flue gas heating surface (1b), the medium temperature flue gas heating surface (1a), the medium and low temperature flue gas heating surface (1b), the secondary steam heat recovery device (3) and the medium temperature section flue gas heat recovery device (6) adopt an extruded aluminum fin heat exchange tube structure coated with a graphene material.
5. The landfill leachate waste heat method zero emission device of claim 1, characterized in that the solidification device (5) adopts fly ash chelation solidification facility or ceramsite granulation device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115807943B (en) * | 2021-09-14 | 2024-05-03 | 淮安零碳能源环保科技有限公司 | Production system for generating electricity by garbage incineration |
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