CN108716771B - Industrial wastewater waste heat cascade heat work conversion device and method - Google Patents
Industrial wastewater waste heat cascade heat work conversion device and method Download PDFInfo
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- CN108716771B CN108716771B CN201810577156.4A CN201810577156A CN108716771B CN 108716771 B CN108716771 B CN 108716771B CN 201810577156 A CN201810577156 A CN 201810577156A CN 108716771 B CN108716771 B CN 108716771B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
Abstract
The invention provides an industrial waste water waste heat cascade heat power conversion device and method, which solve the technical problems of insufficient heat exchange, low heat exchange efficiency, high sewage discharge temperature and easiness in blocking heat exchange and water treatment equipment caused by waste water heat recovery through a heat exchanger in the existing industrial waste water waste heat recovery method. The waste water treatment device is provided with a waste water collecting tank, a waste water tank, a first-effect multi-medium heat exchanger, a second-effect multi-medium heat exchanger, a heat pump unit, a hot water tank, a clear water deep well and a cold sewage well, wherein a filter is arranged between the waste water collecting tank and the waste water tank, an evaporator and a condenser are arranged on the heat pump unit, a heat source circulating pump is arranged between the first-effect multi-medium heat exchanger and the condenser, a cold source circulating pump is arranged between the second-effect multi-medium heat exchanger and the evaporator, and a clear water input pump is arranged between the clear water deep well and the second-effect multi-medium heat exchanger. The invention can be widely applied to the recovery process of waste water and waste heat.
Description
Technical Field
The invention relates to an industrial wastewater waste heat conversion device and method, in particular to an industrial wastewater waste heat cascade heat work conversion device and method.
Background
In the fields of printing and dyeing, beer beverage, bath and the like, a large amount of high-grade waste heat and wastewater is directly discharged without recycling, a large amount of heat energy is wasted, and the ecological environment is polluted, so that a large amount of researches on heat energy recycling in the fields are carried out at home and abroad, but the following problems still exist at present:
(1) Insufficient heat exchange: the heat exchange is simply carried out through the heat exchanger, the heat extraction is insufficient, and the temperature of the discharged wastewater is still high;
(2) The heat exchange efficiency is low: to raise the temperature of the new water, a large amount of waste sewage is required to be used, and the ratio of the new water to the sewage is less than 1:1, so that the sewage is not used enough;
(3) The sewage discharge temperature is high: because the temperature of the discharged sewage is very high, great pressure is caused to the sewage treatment in the later period, the sewage cannot be effectively biochemically treated, and the national sewage discharge standard cannot be met;
(4) Easy blocking: filtration is a major problem, and fluff in sewage is prone to cause blockage of heat exchange and water treatment equipment.
Disclosure of Invention
Aiming at the technical problems of insufficient heat exchange, low heat exchange efficiency, high sewage discharge temperature and easiness in blocking heat exchange and water treatment equipment caused by heat exchange of the waste water heat recovery in the existing industrial waste water waste heat recovery method, the invention provides the industrial waste water waste heat cascade heat-work conversion device and method, which are more sufficient in heat exchange, high in heat exchange efficiency, low in sewage discharge temperature, capable of effectively filtering fluff in sewage and capable of fully utilizing cold energy generated in the exchange process to improve the working environment.
The technical scheme of the invention is that the industrial wastewater waste heat cascade heat power conversion device comprises a waste water collecting tank, a waste water tank, a one-effect multi-medium heat exchanger, a two-effect multi-medium heat exchanger, a heat pump unit, a hot water tank, a clean water source and a cold sewage source;
the waste water tank is connected with the waste water tank through a pipeline, a waste water conveying pump is arranged between the waste water tank and the waste water tank, the waste water tank is connected with the one-effect multi-medium heat exchanger through a pipeline, and a waste water input pump is arranged between the waste water tank and the one-effect multi-medium heat exchanger;
the heat pump unit is provided with an evaporator and a condenser, the one-effect multi-medium heat exchanger is connected with the condenser through a pipeline, a heat source circulating pump is arranged between the one-effect multi-medium heat exchanger and the evaporator, the one-effect multi-medium heat exchanger is connected with a hot water tank through a pipeline, a waste water conveying pipe and a clear water conveying pipe are arranged between the one-effect multi-medium heat exchanger and the two-effect multi-medium heat exchanger, the two-effect multi-medium heat exchanger is connected with the evaporator through a pipeline, a cold source circulating pump is arranged between the two-effect multi-medium heat exchanger and the evaporator, the two-effect multi-medium heat exchanger is connected with a cold sewage source through a pipeline, the two-effect multi-medium heat exchanger is connected with a clear water source through a pipeline, and a clear water input pump is arranged between the clear water source and the two-effect multi-medium heat exchanger.
Preferably, the waste water collecting tank is provided with a waste water collecting tank liquid level meter, the waste water tank is provided with a waste water tank liquid level meter, the hot water tank is provided with a hot water tank liquid level meter, the waste water collecting tank liquid level meter is connected with a waste water conveying pump, the waste water tank liquid level meter is connected with a waste water input pump, a clear water input pump is connected with the hot water tank liquid level meter, a heat meter is arranged between the two-effect multi-medium heat exchanger and the cold sewage source, and a heat meter is arranged between the clear water input pump and the clear water source.
Preferably, an expansion tank is arranged between the heat source circulating pump and the condenser, and an expansion tank is arranged between the cold source circulating pump and the evaporator.
Preferably, a filter is arranged between the waste water tank and the waste water conveying pump, and an automatic blow-down valve is arranged below the filter.
Preferably, a pressure gauge and a temperature transmitter are arranged between the wastewater input pump and the one-effect multi-medium heat exchanger, a pressure gauge and a temperature transmitter are arranged between the heat source circulating pump and the one-effect multi-medium heat exchanger, a pressure gauge and a temperature transmitter are arranged between the cold source circulating pump and the two-effect multi-medium heat exchanger, a temperature transmitter is arranged between the one-effect multi-medium heat exchanger and the hot water tank, and a pressure gauge and a temperature transmitter are arranged between the cold source circulating pump and the one-effect multi-medium heat exchanger.
Preferably, a heating control valve is arranged between the condenser and the one-effect multi-medium heat exchanger, and a refrigerating control valve is arranged between the evaporator and the two-effect multi-medium heat exchanger.
The invention also provides an industrial waste water waste heat cascade heat power conversion method applying the device, which specifically comprises the following steps:
(1) Collecting hot waste water discharged in production and life into a waste water collecting tank, and when a waste water collecting tank liquid level meter detects that the hot waste water reaches a certain height, starting a waste water conveying pump, conveying waste hot water into a filter, and filtering fluff in the waste water;
(2) When the filtered hot waste water enters a waste water tank, a waste water tank liquid level meter detects that the water level reaches a certain height, a waste water input pump is started, the waste water is conveyed to an one-effect multi-medium heat exchanger, the hot waste water and clean water are subjected to heat exchange in the one-effect multi-medium heat exchanger, the temperature of the hot waste water is reduced after the heat exchange in the one-effect multi-medium heat exchanger, the hot waste water enters a two-effect multi-medium heat exchanger through a waste water conveying pipe, the heat exchange is further carried out with cold clean water in the two-effect multi-medium heat exchanger, meanwhile, an evaporator absorbs residual heat in the waste water, the temperature of the waste water is further reduced, and the waste water is discharged into a cold sewage source;
(3) Cold clean water passes through a heat meter from a deep well, is conveyed to a two-effect multi-medium heat exchanger by a clean water input pump, exchanges heat with waste water which has undergone primary heat exchange, flows through a clean water conveying pipe after absorbing heat to enter the one-effect multi-medium heat exchanger, exchanges heat with waste water with higher temperature and a condenser in the one-effect multi-medium heat exchanger, and flows into a hot water tank after the temperature reaches balance.
Compared with the prior art, the invention has the following beneficial effects:
(1) Due to the arrangement of the filter, fluff in the wastewater is filtered, so that the blockage of the wastewater to the heat exchange device is avoided;
(2) The temperature of hot water and cold water is fully exchanged due to the arrangement of the one-effect multi-medium heat exchanger and the two-effect multi-medium heat exchanger, the temperature of cold water is fully increased, the temperature of sewage is lower, and the ecological environment is protected;
(3) The heat exchange ratio of cold water to hot water is close to 1:1 because the first-effect multi-medium heat exchanger and the second-effect multi-medium heat exchanger are arranged, so that the waste water consumption is saved, and the heat exchange efficiency is improved;
(4) Because the heat pump unit is arranged, the heat pump unit comprises an evaporator and a condenser, and the evaporator and the condenser are respectively provided with an expansion tank, so that the heat exchange difference is reduced, the heat exchange is safe and reliable, the service life of the heat exchanger is prolonged, the heat pump unit is used for improving the working environment, and the energy utilization rate is improved.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
The symbols in the drawings illustrate:
1. a waste water collection tank; 2. a waste water collecting tank level gauge; 3. a waste water transfer pump; 4. a filter; 5. a waste water tank; 6. waste water tank level gauge; 7. a waste water input pump; 8. a pressure gauge; 9. a temperature transmitter; 10. a one-effect multi-medium heat exchanger; 11. a heat source circulation pump; 12. an expansion tank; 13. a condenser; 14. a heat pump unit; 15. a hot water tank; 16. a hot water tank level gauge; 17. a hot water output pump; 18. an evaporator; 19. a cold source circulating pump; 20. a cold sewage well; 21. a calorimeter; 22. a two-effect multi-medium heat exchanger; 23. a clear water delivery pipe; 24. a waste water conveying pipe; 25. clean water is input into the pump; 26. clear water deep well; 27. an automatic blow-down valve; 28. a heating control valve; 29. a refrigeration control valve.
Detailed Description
The invention is further described below with reference to examples.
The utility model provides an industrial waste water waste heat cascade heat merit conversion equipment, including useless header tank 1, waste water tank 5, one effect multi-medium heat exchanger 10, two effect multi-medium heat exchanger 22, heat pump set 14, hot water tank 15, clear water deep well 26 and cold sewage well 20, be equipped with useless header tank level gauge 2 on the waste header tank 1, useless header tank 1 passes through the pipe connection with waste water tank 5, be equipped with waste water tank level gauge 6 on the waste water tank 5, be equipped with filter 4 between useless header tank 1 and the waste water tank 5, be equipped with automatic blowoff valve 27 below filter 4, after a period of operation, the fine hair in the filter 4 accumulates a certain amount, automatic blowoff valve 27 opens, discharge fine hair impurity into cold sewage well 20. A waste water conveying pump 3 is arranged between the waste water collecting tank 1 and the filter 4, the waste water conveying pump 3 is connected with the waste water collecting tank liquid level meter 2, the water level in the waste water collecting tank 1 is monitored by the waste water collecting tank liquid level meter 2 to control the on-off of the waste water conveying pump 3, fluff in waste water can be effectively filtered by the filter 4, and the blockage of a heat exchange system is avoided;
the waste water tank 5 is connected with the first-effect multi-medium heat exchanger 10 through a pipeline, a waste water input pump 7 is arranged between the waste water tank 5 and the first-effect multi-medium heat exchanger 10, the waste water input pump 7 is connected with the waste water tank liquid level meter 6, the heat pump unit 14 comprises a condenser 13 and an evaporator 18, the first-effect multi-medium heat exchanger 10 is connected with the condenser 13 through a pipeline, a heat source circulating pump 11 is arranged between the first-effect multi-medium heat exchanger 10 and the condenser 13, an expansion tank 12 is arranged between the heat source circulating pump 11 and the condenser 13, the expansion tank 12 can supply energy in the pipeline to reduce the temperature difference, the first-effect multi-medium heat exchanger 10 is connected with the hot water tank 15 through a pipeline, a hot water tank liquid level meter 16 is arranged on the hot water tank 15, a waste water conveying pipe 24 and a clear water conveying pipe 23 are arranged between the first-effect multi-medium heat exchanger 10 and the second-effect multi-medium heat exchanger 22, a cold source circulating pump 19 is arranged between the second-effect multi-medium heat exchanger 22 and the evaporator 18 through a pipeline, an expansion tank 12 is arranged between the cold source circulating pump 19 and the evaporator 18, an expansion tank 12 is arranged between the heat pump 22 and the second-effect multi-medium heat exchanger 22 and the evaporator 18, the heat pump 20 is connected with the deep well heat pump 25 through a deep well heat exchanger 20 and a heat pump 25, the heat pump 25 is connected with the clean water medium through a heat pump 25, the heat pump 25 is arranged between the second-effect multi-medium heat exchanger and the heat exchanger 2 and the clean water level meter 25 is connected with the clean water medium, the clean water medium through a pipeline, the heat pump 25 is arranged between the heat pump 2 and the heat pump 2 is connected between the heat pump 2 and the heat pump 2.
A pressure meter 8 and a temperature transmitter 9 are arranged between the waste water input pump 7 and the first-effect multi-medium heat exchanger 10, a pressure meter 8 and a temperature transmitter 9 are arranged between the heat source circulating pump 11 and the first-effect multi-medium heat exchanger 10, a pressure meter 8 and a temperature transmitter 9 are arranged between the cold source circulating pump 19 and the second-effect multi-medium heat exchanger 22, a temperature transmitter 9 is arranged between the first-effect multi-medium heat exchanger 10 and the hot water tank 15, a pressure meter 8 and a temperature transmitter 9 are arranged between the cold source circulating pump 19 and the first-effect multi-medium heat exchanger 10, and a temperature transmitter 9 is arranged between the heat meter 21 and the second-effect multi-medium heat exchanger 22.
A heating control valve 28 is arranged between the condenser 13 and the one-effect multi-medium heat exchanger 10, a refrigerating control valve 29 is arranged between the evaporator 18 and the two-effect multi-medium heat exchanger 22, the heating control valve 28 and the refrigerating control valve 29 can control the direction of cold and heat in pipelines, a pipeline between the condenser 13 and the one-effect multi-medium heat exchanger 10 can be externally connected with an air conditioner pipeline, the heating function of the air conditioner is realized, a pipeline between the evaporator 18 and the two-effect multi-medium heat exchanger 22 can be externally connected with the air conditioner pipeline, and the refrigerating function of the air conditioner is realized.
According to the needs of heat exchange medium, can set up a plurality of multi-media heat exchangers and carry out many times heat exchange treatment, realize better heat transfer effect.
An industrial wastewater waste heat cascade heat work conversion method comprises the following steps:
(1) Collecting the hot waste water discharged in the fields of printing and dyeing, beer beverage and the like into a waste water collecting tank 1, and starting a waste water conveying pump 3 when a waste water collecting tank liquid level meter 2 detects that the hot waste water reaches a certain height, conveying the waste water into a filter 4, and filtering fluff in the waste water;
(2) When the filtered hot waste water enters the waste water tank 5, the waste water tank level gauge 6 detects that the water level reaches a certain height, the waste water input pump 7 is started, the waste water is conveyed to the one-effect multi-medium heat exchanger 10 through the pressure gauge 8 and the temperature transmitter 9, the hot waste water exchanges heat with clean water in the one-effect multi-medium heat exchanger 10, the temperature of the hot waste water is reduced after the heat exchange in the one-effect multi-medium heat exchanger 10, the hot waste water enters the two-effect multi-medium heat exchanger 22 through the waste water conveying pipe 24, the heat exchange is further carried out with deep well clean water in the two-effect multi-medium heat exchanger 22, meanwhile, the evaporator 18 absorbs residual heat in the waste water, the temperature of the waste water is further reduced, and the waste water is discharged into the cold sewage well 20;
(3) Cold clean water is conveyed to the double-effect multi-medium heat exchanger 22 from the clean water deep well 26 through the heat meter 21 by the clean water input pump 25, and is subjected to heat exchange with the waste water subjected to the second heat exchange and the evaporator 18, wherein in the heat exchange process, the three mediums are independently operated, and after heat absorption, the three mediums flow through the clean water conveying pipe 23 to enter the single-effect multi-medium heat exchanger 10, are subjected to heat exchange with the waste water with higher temperature and the condenser 13 in the single-effect multi-medium heat exchanger 10, and after the temperature reaches balance, flow into the hot water tank 15, and the hot water output pump 17 is started as required to convey the clean water to a required place.
The temperature of the washing water is between 90 ℃ and 95 ℃, and the temperature of the sewage just discharged from the washing water tank is about 85 ℃. Firstly, the heat preservation treatment is carried out on each flowing link of the discharged sewage, the temperature of the discharged sewage is 70-80 ℃, the whole set of device adopts a double-isolation multi-stage heat exchange technology, and the double-effect exchange is carried out on clear water and 80 ℃ high-temperature waste water through an overlapping cross heat exchange technology to improve the hot water yield and the hot water temperature. When the waste water and the clean water are subjected to primary and secondary heat exchange, the heat is further recovered by utilizing an intermediate medium through the heat pump unit 14, hot water at 65-75 ℃ is finally prepared, and the waste water is discharged at 15-20 ℃ after the heat is extracted.
In order to prevent fluff fibers in printing and dyeing wastewater from blocking a multi-effect heat exchange system, a three-layer filtering system consisting of polypropylene short fiber industrial filter cloth is adopted to carry out precise filtering treatment on high-temperature wastewater, meanwhile, a German inlet frequency conversion type electronic water processor is added at the inlet of clear water entering the system, and the treated system is not easy to scale and grow bacteria.
In order to prevent the hardness of clean water and waste water and the corrosion damage of chemical agents to the heat pump unit, double isolation measures are adopted, and heat exchange is carried out between the heat pump unit and an intermediate medium through an isolation heat exchange system, so that the cleaning frequency of the heat exchange system is effectively reduced, and clean water and waste water do not directly enter the heat pump unit 14, so that the unit can operate efficiently and stably for a long time.
However, the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention are intended to fall within the scope of the claims.
Claims (7)
1. The industrial waste water waste heat cascade heat work conversion device is characterized by comprising a waste water collecting tank, a waste water tank, a one-effect multi-medium heat exchanger, a two-effect multi-medium heat exchanger, a heat pump unit, a hot water tank, a clean water source and a cold sewage source;
the waste water tank is connected with the waste water tank through a pipeline, a waste water conveying pump is arranged between the waste water tank and the waste water tank, the waste water tank is connected with the one-effect multi-medium heat exchanger through a pipeline, and a waste water input pump is arranged between the waste water tank and the one-effect multi-medium heat exchanger;
the heat pump unit is provided with an evaporator and a condenser, the one-effect multi-medium heat exchanger is connected with the condenser through a pipeline, a heat source circulating pump is arranged between the one-effect multi-medium heat exchanger and the condenser, the one-effect multi-medium heat exchanger is connected with a hot water tank through a pipeline, a waste water conveying pipe and a clear water conveying pipe are arranged between the one-effect multi-medium heat exchanger and the two-effect multi-medium heat exchanger, the two-effect multi-medium heat exchanger is connected with the evaporator through a pipeline, a cold source circulating pump is arranged between the two-effect multi-medium heat exchanger and the evaporator, the two-effect multi-medium heat exchanger is connected with a cold sewage source through a pipeline, the two-effect multi-medium heat exchanger is connected with a clear water source through a pipeline, and a clear water input pump is arranged between the clear water source and the two-effect multi-medium heat exchanger.
2. The industrial wastewater waste heat cascade heat power conversion device according to claim 1, wherein a wastewater collecting tank liquid level meter is arranged on the wastewater collecting tank, a wastewater tank liquid level meter is arranged on the wastewater tank, a hot water tank liquid level meter is arranged on the hot water tank, the wastewater collecting tank liquid level meter is electrically connected with a wastewater conveying pump, the wastewater tank liquid level meter is electrically connected with a wastewater input pump, a clear water input pump is electrically connected with the hot water tank liquid level meter, a heat meter is arranged between the two-effect multi-medium heat exchanger and a cold sewage source, and a heat meter is arranged between the clear water input pump and the clear water source.
3. The industrial wastewater waste heat cascade heat power conversion device according to claim 1, wherein an expansion tank is arranged between the heat source circulating pump and the condenser, and an expansion tank is arranged between the cold source circulating pump and the evaporator.
4. The industrial wastewater waste heat cascade heat work conversion device according to claim 1, wherein a filter is arranged between the wastewater tank and the wastewater delivery pump, and an automatic blow-down valve is arranged below the filter.
5. The industrial wastewater waste heat cascade heat power conversion device according to claim 1, wherein a pressure gauge and a temperature transmitter are arranged between the wastewater input pump and the one-effect multi-medium heat exchanger, a pressure gauge and a temperature transmitter are arranged between the heat source circulating pump and the one-effect multi-medium heat exchanger, a pressure gauge and a temperature transmitter are arranged between the cold source circulating pump and the two-effect multi-medium heat exchanger, a temperature transmitter is arranged between the one-effect multi-medium heat exchanger and the hot water tank, and a pressure gauge and a temperature transmitter are arranged between the cold source circulating pump and the one-effect multi-medium heat exchanger.
6. The industrial wastewater waste heat cascade heat work conversion device of claim 1, wherein a heating control valve is arranged between the condenser and the one-effect multi-medium heat exchanger, and a refrigerating control valve is arranged between the evaporator and the two-effect multi-medium heat exchanger.
7. The invention also provides an industrial wastewater waste heat cascade heat work conversion method applying the device of claims 1-6, which specifically comprises the following steps:
(1) Collecting hot waste water discharged in production and life into a waste water collecting tank, and when a waste water collecting tank liquid level meter detects that the hot waste water reaches a certain height, starting a waste water conveying pump, conveying waste hot water into a filter, and filtering fluff in the waste water;
(2) When the filtered hot waste water enters a waste water tank, a waste water tank liquid level meter detects that the water level reaches a certain height, a waste water input pump is started, the waste water is conveyed to an one-effect multi-medium heat exchanger, the hot waste water and clean water are subjected to heat exchange in the one-effect multi-medium heat exchanger, the temperature of the hot waste water is reduced after the heat exchange in the one-effect multi-medium heat exchanger, the hot waste water enters a two-effect multi-medium heat exchanger through a waste water conveying pipe, the heat exchange is further carried out with cold clean water in the two-effect multi-medium heat exchanger, meanwhile, an evaporator absorbs residual heat in the waste water, the temperature of the waste water is further reduced, and the waste water is discharged into a cold sewage source;
(3) Cold clean water passes through a heat meter from a deep well, is conveyed to a two-effect multi-medium heat exchanger by a clean water input pump, exchanges heat with waste water which has undergone primary heat exchange, flows through a clean water conveying pipe after absorbing heat to enter the one-effect multi-medium heat exchanger, exchanges heat with waste water with higher temperature and a condenser in the one-effect multi-medium heat exchanger, and flows into a hot water tank after the temperature reaches balance.
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| CN201810577156.4A CN108716771B (en) | 2018-06-07 | 2018-06-07 | Industrial wastewater waste heat cascade heat work conversion device and method |
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| CN109579106B (en) * | 2018-11-20 | 2021-06-18 | 中国建筑西北设计研究院有限公司 | Heating system based on multi-temperature-zone mixed water tank |
| CN110285439A (en) * | 2019-07-25 | 2019-09-27 | 李爱华 | Flue gas processing method and its device |
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| CN204574616U (en) * | 2015-04-03 | 2015-08-19 | 山西文龙煤矿工程设计有限公司 | A kind of heat pump of efficiency utilization publilc baths waste water residual heat |
| CN205991640U (en) * | 2016-08-25 | 2017-03-01 | 陈松青 | Source pump and the dead-beat source crude sewage heating system using this source pump |
| CN208349571U (en) * | 2018-06-07 | 2019-01-08 | 威海双信节能环保设备有限公司 | A kind of industrial wastewater waste heat overlapping heat to power output device |
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