CN108106052B - Cold secondary recycle system in frozen aquatic products wastewater that unfreezes - Google Patents
Cold secondary recycle system in frozen aquatic products wastewater that unfreezes Download PDFInfo
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- CN108106052B CN108106052B CN201810021696.4A CN201810021696A CN108106052B CN 108106052 B CN108106052 B CN 108106052B CN 201810021696 A CN201810021696 A CN 201810021696A CN 108106052 B CN108106052 B CN 108106052B
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- water
- cold
- heat exchanger
- heat
- cooling
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- 239000002351 wastewater Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 239000010865 sewage Substances 0.000 claims abstract description 24
- 238000004064 recycling Methods 0.000 claims abstract description 22
- 238000010257 thawing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims description 23
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000005374 membrane filtration Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000000108 ultra-filtration Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a secondary recycling system for cooling water in frozen water thawing wastewater. The primary cold energy recycling system adopts the first sewage heat exchanger to directly obtain cold energy, and supplies cold to an aquatic product processing workshop for cooling washing water. The cold energy secondary recycling system adopts a heat pump system, and is used for cooling the tail end of an air cooler of a cold water supply and water production processing workshop and cooling the aquatic product processing workshop. The invention meets the requirements of cooling washing water and cooling workshops, and greatly reduces the energy consumption in the processing process of frozen aquatic products.
Description
Technical Field
The invention belongs to the technical field of energy conservation, and particularly relates to a secondary recycling system and method for cooling water in unfreezing wastewater of frozen aquatic products.
Background
The preservation of the aquatic products is a key link of the whole marine fishery industry chain, and plays an important role in maintaining the quality of the aquatic products. The frozen fresh-keeping technology has the advantages of stable quality, reliable technology and the like, becomes a basic fresh-keeping mode of aquatic products, and the aquatic products using the technology enter a processing enterprise in the form of frozen products to be used as raw materials for aquatic product processing.
Thawing frozen products is an essential step of a processing procedure, tap water is adopted for direct flushing in the existing process, thawing wastewater containing a large amount of cold energy is discharged in a sewage form, and the cold energy is not recycled. Thawing frozen product at-18deg.C to 5deg.C, and releasingIs about 3.87×10 energy 5 kJ, if recycled according to 100% efficiency, is equivalent to saving more than 100 degrees of electricity.
If the cold energy recycling equipment can be used, the cold energy in the unfreezing wastewater is recycled and used for refrigerating the washing water and the workshop air conditioner, so that the ice consumption of enterprises and the power consumption of the air conditioner can be effectively reduced, and a large amount of energy consumption is saved.
However, at home and abroad, no mature system and method for secondary recycling of cold in frozen water for thawing frozen aquatic products exist.
Disclosure of Invention
The purpose of the invention is that: the secondary recycling system for cold energy in the unfreezing wastewater of the frozen aquatic products is provided, the requirement that cold energy in the unfreezing wastewater is recycled for cooling washing water and cooling a processing workshop is met, the quality of the aquatic products is ensured, the consumption of energy sources in the processing process of the frozen aquatic products is greatly reduced, and great economic and social benefits are generated.
The technical scheme adopted for solving the technical problems is as follows:
the secondary recycling system of cold energy in the unfreezing wastewater of the aquatic frozen product is characterized in that the primary system is a direct cooling system, a sewage heat exchanger is adopted to directly obtain cold energy, and the cold energy is supplied to an aquatic product processing workshop for cooling washing water; the other stage adopts a heat pump system, and the tail end of an air cooler of the cooling and water supply processing workshop is used for cooling the aquatic product processing workshop. The cold energy secondary recycling system can completely and independently operate.
The direct cooling system is characterized in that: the efficient sewage heat exchanger is placed in a defrosting water heat exchanger pool, the secondary refrigerant in the efficient sewage heat exchanger exchanges heat with defrosting water, the secondary refrigerant after heat exchange is conveyed to an aquatic product processing workshop through a cold recovery circulating pump and used for cooling workshop washing water, and the secondary refrigerant returns to the sewage heat exchanger after cold transfer and exchanges heat again to obtain cold.
The heat pump system cooling mode is as follows: the efficient sewage heat exchanger is placed in a defrosting water heat exchanger pool, the secondary refrigerant in the sewage heat exchanger exchanges heat with defrosting water, the secondary refrigerant after heat exchange is conveyed to a condenser of the heat pump unit through the heat pump circulating water pump A, after heat absorption and temperature rise are carried out through the condenser of the heat pump unit, the secondary refrigerant returns to the sewage heat exchanger, and heat is discharged to reduce the temperature. Meanwhile, the heat pump unit obtains low-temperature chilled water in the evaporator through refrigerant circulation and conveys the chilled water to the tail end of an air cooler of the aquatic product processing workshop. The temperature of the chilled water rises after passing through the aquatic product processing workshop, and returns to the heat pump unit to cool down again through the heat pump circulating water pump B, so that the refrigerating capacity is obtained by heat exchange again, and the cooling of the aquatic product processing workshop is realized.
When the direct cooling system can not meet the cooling capacity requirement of the aquatic product processing workshop, the direct cooling system and the heat pump system are used for combined cooling, and at the moment, the valves of V5, V2, V3 and V8 are required to be opened, and the valves of V6, V1, V4 and V7 are required to be closed.
Before the unfreezing water in the unfreezing aquatic product area is conveyed into the unfreezing water heat exchanger pool, the unfreezing water is required to pass through the unfreezing water filtering pool, and substances such as suspended matters, soluble organic matters and the like in the unfreezing wastewater are removed by adopting a micro-aeration-ultrafiltration membrane filtration combined process water purification technology, so that a clean energy carrier is provided for the subsequent cold energy secondary recycling.
The beneficial effects of the invention are as follows: the secondary cold energy recycling system is applied to cold energy recycling in the unfreezing wastewater of the frozen aquatic products, meets the requirements of cooling washing water and cooling workshops, and greatly reduces the energy consumption in the frozen aquatic product processing process.
Drawings
Fig. 1 is a schematic diagram of secondary recycling of cold energy in water defrosting wastewater of frozen aquatic products.
In the figure: the sewage treatment system comprises a 1-sewage heat exchanger, a 2-cold energy recovery circulating pump, a 3-heat pump unit, a 4-heat pump circulating water pump A, a 5-heat pump circulating water pump B, and valves V1, V2, V3, V4, V5, V6, V7 and V8.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the secondary recycling system of the cold energy in the frozen product thawing wastewater comprises a direct cooling system and a heat pump system.
The direct cooling system is characterized in that: the efficient sewage heat exchanger 1 is placed in a defrosting water heat exchanger pool 11, the secondary refrigerant in the efficient sewage heat exchanger 1 exchanges heat with defrosting water (about 8 ℃), the secondary refrigerant at about 14 ℃ after heat exchange is conveyed to an aquatic product processing workshop 10 through a cold recovery circulating pump 2 and used for cooling workshop washing water 8 or an air cooler system, the temperature of the secondary refrigerant after cold transfer is about 25 ℃, and the secondary refrigerant returns to the sewage heat exchanger 1 to exchange heat again to obtain cold.
The heat pump system supplies cold mode: the efficient sewage heat exchanger 1 is placed in a defrosting water heat exchanger pool, the secondary refrigerant in the sewage heat exchanger 1 exchanges heat with defrosting water (about 8 ℃), the secondary refrigerant at about 25 ℃ after the heat exchange is conveyed to a condenser of the heat pump unit 3 through the heat pump circulating water pump A4, the temperature is about 30 ℃ after the secondary refrigerant absorbs heat and rises through the condenser of the heat pump unit 3, the secondary refrigerant returns to the sewage heat exchanger 1, and the heat is discharged to reduce the temperature. Meanwhile, the heat pump unit 3 obtains chilled water with low temperature (about 7 ℃) in an evaporator through refrigerant circulation and conveys the chilled water to the tail end 9 of an air cooler of the aquatic product processing workshop. After passing through the aquatic product processing workshop, the temperature of the frozen water rises (reaches about 12 ℃), and returns to the heat pump unit 3 for cooling circulation again through the heat pump circulating water pump B5, and the cooling capacity is obtained by heat exchange again, so that the cooling of the aquatic product processing workshop is realized.
When the direct cooling system can not meet the cooling capacity requirement of the aquatic product processing workshop, the direct cooling system and the heat pump system are used for jointly cooling, and at the moment, the valves of V5, V2, V3 and V8 are required to be opened, and the valves of V6, V1, V4 and V7 are required to be closed.
Before the unfreezing water (about 2 ℃) in the unfreezing aquatic product area 6 is conveyed into the unfreezing water heat exchanger pool, the unfreezing water is required to pass through the unfreezing water filtering pool 7, and substances such as suspended matters, soluble organic matters and the like in the unfreezing wastewater are removed by adopting a micro-aeration-ultrafiltration membrane filtration combined process water purification technology, so that a clean energy carrier is provided for the subsequent cold energy secondary recycling.
Claims (3)
1. System for secondary recycling of cold water in frozen aquatic product defrosting wastewater, comprising
The first sewage heat exchanger is adopted to directly obtain cold energy, and the cold energy is supplied to an aquatic product processing workshop for cooling washing water;
the cold energy secondary recycling system adopts a heat pump system, and is used for cooling the tail end of an air cooler of a water supply processing workshop and cooling the water supply processing workshop;
the method is characterized in that:
the cold energy secondary recycling system specifically comprises:
the second sewage heat exchanger is placed in the defrosting water heat exchanger pool, the secondary refrigerant in the second sewage heat exchanger exchanges heat with defrosting water, the secondary refrigerant after heat exchange is conveyed to a condenser of the heat pump unit through the first heat pump circulating water pump, after heat absorption and temperature rise are carried out by the condenser of the heat pump unit, the secondary refrigerant returns to the second sewage heat exchanger, and the heat is discharged to reduce the temperature;
the heat pump unit obtains low-temperature chilled water in the evaporator through refrigerant circulation and conveys the chilled water to the tail end of an air cooler of the aquatic product processing workshop; the temperature of the frozen water rises after passing through the aquatic product processing workshop, and returns to the heat pump unit to cool down again through the second heat pump circulating water pump, so that the refrigerating capacity is obtained by heat exchange again, and the cooling of the aquatic product processing workshop is realized.
2. The cold secondary recycling system in frozen aquatic product defrosting wastewater according to claim 1, which is characterized in that:
the first-stage cold energy recycling system specifically comprises:
the first sewage heat exchanger is placed in a defrosting water heat exchanger pool, the secondary refrigerant in the first sewage heat exchanger exchanges heat with defrosting water, the secondary refrigerant after heat exchange is conveyed to an aquatic product processing workshop through a cold recovery circulating pump and used for cooling workshop washing water, and the secondary refrigerant returns to the first sewage heat exchanger after cold transfer and exchanges heat again to obtain cold.
3. The cold secondary recycling system in frozen aquatic product defrosting wastewater according to claim 1, which is characterized in that: before the unfreezing water in the unfreezing aquatic product area is conveyed into the unfreezing water heat exchanger pool, the unfreezing water is required to pass through the unfreezing water filtering pool, and a micro-aeration-ultrafiltration membrane filtration combined process water purification technology is adopted to remove suspended matters and soluble organic matters in the unfreezing wastewater, so that a clean energy carrier is provided for the subsequent cold energy secondary recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021696.4A CN108106052B (en) | 2018-01-10 | 2018-01-10 | Cold secondary recycle system in frozen aquatic products wastewater that unfreezes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021696.4A CN108106052B (en) | 2018-01-10 | 2018-01-10 | Cold secondary recycle system in frozen aquatic products wastewater that unfreezes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108106052A CN108106052A (en) | 2018-06-01 |
| CN108106052B true CN108106052B (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810021696.4A Active CN108106052B (en) | 2018-01-10 | 2018-01-10 | Cold secondary recycle system in frozen aquatic products wastewater that unfreezes |
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| CN (1) | CN108106052B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410670A (en) * | 2011-09-27 | 2012-04-11 | 北京矿大节能科技有限公司 | Utilization device of abandoned freezing pipe of coal mine and application method thereof |
| CN203336876U (en) * | 2013-05-13 | 2013-12-11 | 大连恒通和科技有限公司 | Four-season type energy-saving heat pump applied to aquaculture pool |
| CN203615649U (en) * | 2013-11-28 | 2014-05-28 | 青岛理工大学 | Capillary seawater source heat pump system for seawater aquaculture |
| CN105042933A (en) * | 2015-07-27 | 2015-11-11 | 南通昊友食品添加剂有限公司 | Recovery device for waste heat of waste water |
| CN205641687U (en) * | 2016-05-27 | 2016-10-12 | 广东海洋大学 | Solar energy - heat pump vacuum thawing precooling apparatus |
| CN106322827A (en) * | 2016-08-30 | 2017-01-11 | 湖南中大经纬地热开发科技有限公司 | Terrestrial heat utilization method based on industrial waste water source |
| KR20170142516A (en) * | 2016-06-17 | 2017-12-28 | 이완호 | Waste heat recycling system using a hybrid heat pump |
| CN207688455U (en) * | 2018-01-10 | 2018-08-03 | 浙江大学舟山海洋研究中心 | Cold energy secondary recovery utilizes system in a kind of aquatic products frozen product defrosting waste water |
-
2018
- 2018-01-10 CN CN201810021696.4A patent/CN108106052B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410670A (en) * | 2011-09-27 | 2012-04-11 | 北京矿大节能科技有限公司 | Utilization device of abandoned freezing pipe of coal mine and application method thereof |
| CN203336876U (en) * | 2013-05-13 | 2013-12-11 | 大连恒通和科技有限公司 | Four-season type energy-saving heat pump applied to aquaculture pool |
| CN203615649U (en) * | 2013-11-28 | 2014-05-28 | 青岛理工大学 | Capillary seawater source heat pump system for seawater aquaculture |
| CN105042933A (en) * | 2015-07-27 | 2015-11-11 | 南通昊友食品添加剂有限公司 | Recovery device for waste heat of waste water |
| CN205641687U (en) * | 2016-05-27 | 2016-10-12 | 广东海洋大学 | Solar energy - heat pump vacuum thawing precooling apparatus |
| KR20170142516A (en) * | 2016-06-17 | 2017-12-28 | 이완호 | Waste heat recycling system using a hybrid heat pump |
| CN106322827A (en) * | 2016-08-30 | 2017-01-11 | 湖南中大经纬地热开发科技有限公司 | Terrestrial heat utilization method based on industrial waste water source |
| CN207688455U (en) * | 2018-01-10 | 2018-08-03 | 浙江大学舟山海洋研究中心 | Cold energy secondary recovery utilizes system in a kind of aquatic products frozen product defrosting waste water |
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| CN108106052A (en) | 2018-06-01 |
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