CN102721221A - Production process cooling water waste heat recovery system - Google Patents

Production process cooling water waste heat recovery system Download PDF

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Publication number
CN102721221A
CN102721221A CN2012101875158A CN201210187515A CN102721221A CN 102721221 A CN102721221 A CN 102721221A CN 2012101875158 A CN2012101875158 A CN 2012101875158A CN 201210187515 A CN201210187515 A CN 201210187515A CN 102721221 A CN102721221 A CN 102721221A
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water
cooling water
heat
temperature
user
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CN2012101875158A
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何秀锦
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何秀锦
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Priority to CN2012101875158A priority Critical patent/CN102721221A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

A production process cooling water waste heat recovery system comprises a cooling water pipe of a main production line. An inlet and an outlet of the cooling water pipe are communicated with a cold water tank and a hot water tank respectively, the hot water tank is respectively communicated with a plate heat exchanger, a water cooler and a medium-temperature user side through high-temperature water supply main pipes, the plate heat exchanger, the water cooler and the medium-temperature user side are communicated with the cold water tank through low-temperature water return main pipes, the plate heat exchanger is further communicated with a heat source water tank through a pipeline, heat source water heated by the plate heat exchanger is respectively communicated with a low-temperature user side and a waste heat boiler through heat source water pipelines and is further communicated with a high-temperature user side through a bypass pipe, and the waste heat boiler is communicated with the high-temperature user side and is communicated with the main production line through a flue. By the aid of the plate heat exchanger, the waste heat boiler, the low-temperature user side, the medium-temperature user side and the high-temperature user side, heat sources of different grades can be supplied by the aid of waste heat of production process cooling water, and low-grade waste heat of the cooling water is efficiently used in a cascaded manner.

Description

Production technology cooling water heat recovery system
Technical field
The present invention relates to a kind of residual neat recovering system, particularly a kind of production technology cooling water heat recovery system.
Background technology
Along with energy prices are soaring, environmental requirement improves; Heat recovery technology obtains fast development; The heat recovery technology of highly energy-consuming industries such as iron and steel, coloured, coking, cement, glass obtains develop rapidly; Temperature reaches its maturity at the middle high-temperature flue gas exhaust heat recovery power generation more than 300 ℃ or the technology of producing steam, and is used widely, for relevant industries have been created great economic benefit, made significant contribution for energy-saving and emission-reduction work.But low grade residual heat utilizes technology also very immature.The big amount temperature recirculated cooling water in 25 ℃~60 ℃ scopes that produces in the production technology of enterprises such as chemical plant, steel plant, steam power plant, glass factory; Though the waste heat amount that these recirculated cooling waters carry is very big; But because energy grade is low, existence utilizes technical barrier; Be far from making full use of, the heat that most recirculated cooling waters carry is to be discharged in the atmosphere through cooling column or aerial cooler, not only causes energy waste; The operation of aerial cooler and cooling column is electric energy, the water resource of consume valuable also, and the discharging quantity of waste heat has also caused the environmental thermal pollution problem in atmosphere.
In order to solve energy waste, power consumption, water consumption and the environmental thermal pollution problem that recirculated cooling water causes; Correlation engineering technical staff does a lot of work in the low-grade UTILIZATION OF VESIDUAL HEAT IN of recirculated cooling water field; Mainly be to utilize the waste heat of cooling water to carry out heat supply in winter: or heat after directly utilizing the cooling water heat heating or adopting the temperature increase of heat pump techniques to cooling water, the residual heat resources that cooling water carries have been carried out partially recycled utilization.
Jinchang iron industry (group) Co., Ltd utilizes the heating of palletizing shaft furnace cooling water heat, and the 2t/h heating boiler of having stopped using has been obtained obvious energy-saving effect (Liu Hongxiong uses the practice of palletizing shaft furnace cooling water heat heating, and is energy-conservation, 2008 the 5th phases).
After being transformed into high-grade heat energy, the recirculated cooling water low grade residual heat that utilizes heat pump techniques will be difficult to directly to utilize carries out heating.Su Baoqing has accomplished " reclaiming power plant's condensation heat central heating technical research with heat pump " (Shanxi energy and energy-conservation, 2007 the 3rd phases, 18~19 pages); (working medium is 134a, and 35~40 ℃ of heat pump cold water inflow temperatures, heat-pump hot-water return water temperature are not less than 55~60 ℃ to adopt heat pump of high-temp water source; 75~80 ℃ of heat-pump hot-water leaving water temperatures, the efficiency coefficient of source pump is not less than 4.5), reclaim low grade heat energy in the power plant cooling water; Thermal source as the central heating in winter; Be life heating station, effects of energy saving and emission reduction is remarkable, reduces the used heat of recirculated water to environment row significantly; Patent of invention " waste heat recovery of a kind of steam power plant and hot water step heating heat supply method " (application number: 200910090917.4) disclose: utilize heat pump techniques; Cooling water heat absorption from the power plant; Through one or more levels heating; After water temperature risen to middle temperature (60~80 ℃) or high temperature (110 ℃),, carry out Winter heat supply with the central heating heat exchange station of delivery to the urban district; Utility model patent " cooling water of thermoelectric plant waste heat recovering energy conserving heating system " (Granted publication number: CN 202008182U) disclose: utilize heat pump techniques, promote the temperature of circulating cooling water of power plant, as the thermal source of sub-district central heating in winter.
The temperature of most of cooling water is all below 60 ℃, and the heat energy grade is too low can not to be used for direct heating.After adopting heat pump techniques to improve cooling water temperature; Energy grade is improved; The heating field has obtained partly applying in the winter time; But heat pump techniques promotes cooling water temperature and need consume the high-quality electric energy, and under the economically feasible condition, and the waste heat that heat pump generally only can utilize cooling water rises to 85 ℃ with the heat supply hot water temperature is the highest.Therefore, in power supply shortage and the higher area of electricity price, the grade of utilizing heat pump techniques to promote cooling water heat is used for heat supply in winter and uneconomical; Owing to 85 ℃ of the maximum economic boost temperature that is subject to heat pump techniques, the popularization on a large scale that utilizes heat pump techniques to carry out the cooling water heat recovery has run into development bottleneck.
In addition, can only reclaim the residual heat resources of cooling water,, must be discharged in the atmosphere through traditional cooling column or aerial cooler a large amount of waste heats with cooling water at non-heating period in the heating phase.Residual heat resources waste problem, environmental thermal pollution problem, cooling column or aerial cooler power consumption and the water consumption problem of cooling water still are not solved.
Summary of the invention
The object of the present invention is to provide a kind of production technology cooling water heat recovery system that can better realize the high-efficiency comprehensive utilization of cooling water heat resource; The present invention had both realized the efficient cascade utilization of cooling water heat, had solved the thermal pollution problem that power consumption, water consumption and the cooling water of cooling column and aerial cooler cause to environmental emission used heat again.
For achieving the above object; The technical scheme that the present invention adopts is: comprise the cooling water pipe of installing in the main line; The inlet of described cooling water pipe is connected with water cooling pond; Outlet is connected with hot-tub; Hot-tub is connected with the inlet of plate type heat exchanger, water chiller and middle temperature user side respectively through the female pipe of high temperature water supply, and the outlet of plate type heat exchanger, water chiller and middle temperature user side is connected with water cooling pond through the female pipe of low temperature backwater, and described plate type heat exchanger also is connected with the thermal source pond through pipeline; The heat source water of plate type heat exchanger heating is connected with low temperature user side, high temperature user side and waste heat boiler respectively through the thermal source water pipe, and described waste heat boiler is connected with main line through flue.
On described plate type heat exchanger and the pipeline that the thermal source pond is connected the thermal source water pump is installed also; The import and export of the heat source water side of plate type heat exchanger is equipped with the import and export valve respectively.
Water supply pump and water cooling pond outlet valve also are installed on the described water cooling pond outlet conduit.
The hot-tub inlet valve is installed on the pipeline between described cooling water pipe and the hot-tub, and on the pipeline between hot-tub and the female pipe of high temperature water supply, heat-exchanger pump is installed.
Described high temperature supplies water and is provided with inlet valve on female pipe and the pipeline that plate type heat exchanger, water chiller, middle temperature user side are connected.
On the export pipeline of described plate type heat exchanger, water chiller, middle temperature user side outlet valve is installed all.
On described plate type heat exchanger and the thermal source water pipe that low temperature user side, high temperature user side, waste heat boiler are connected valve is installed all.
On described waste heat boiler and the flue that main line is connected valve is installed.
On the described waste heat boiler air-introduced machine is installed.
Described thermal source water pipe is connected with the high temperature user side through the heat source water bypass that has valve; The thermal source water pipe is connected with the high temperature user side through waste heat boiler.
The present invention is through plate type heat exchanger, waste heat boiler; Hot grade to cooling water is carried out lifting in various degree; The low temperature user side of multiple hot grade, middle temperature user side, high temperature user side are provided; Both realize the efficient cascade utilization of cooling water heat, solved the thermal pollution problem that power consumption, water consumption problem and the cooling water of cooling column and aerial cooler cause to environmental emission used heat again.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention.
Plate type heat exchanger 1; Water chiller 2; Thermal source water pump 3; Thermal source pond 4; The female pipe 5 of low temperature backwater; In warm user side 6; The female pipe 7 of high temperature water supply; Water cooling pond 8; Water supply pump 9; Main line 10; Flue 11; Waste heat boiler 12; High temperature user side 13; Air-introduced machine 14; Heat source water bypass 15; Low temperature user side 16; Thermal source water pipe 17; Cooling water pipe 18; Hot-tub 19; Heat-exchanger pump 20;
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
Referring to Fig. 1; The present invention includes main line 10 and be installed in the cooling water pipe 18 in the main line 10; The inlet of described cooling water pipe 18 is connected with the water cooling pond 8 that water supply pump 9 and water cooling pond outlet valve are installed; Outlet is connected with the hot-tub that the hot-tub inlet valve is installed 19; Hot-tub 19 is connected with the female pipe 7 of high temperature water supply through the pipeline that heat-exchanger pump 20 is installed; The female pipe 7 of high temperature water supply is connected with the inlet of the plate type heat exchanger that has inlet valve 1, water chiller 2 and middle temperature user side 6 respectively; The outlet of plate type heat exchanger 1, water chiller 2 and middle temperature user side 6 is connected with water cooling pond 8 through the female pipe of low temperature backwater 5; And female the pipe on the export pipeline that is connected of plate type heat exchanger 1, water chiller 2, middle temperature user side 6 and low temperature backwater outlet valve is installed all, described plate type heat exchanger 1 also is connected with thermal source pond 4 through the pipeline that thermal source water pump 3 and heat source water valve are installed, and plate type heat exchanger 1 is connected with thermal source water pipe 17 through the pipeline that has outlet valve; Heat source water after plate type heat exchanger 1 heating is connected with the waste heat boiler 12 of valvular low temperature user side 16 all being installed, have a high temperature user side 13 respectively through thermal source water pipe 17; And thermal source water pipe 17 also is connected with high temperature user side 13 through the heat source water bypass 15 that has valve, and described waste heat boiler 12 is connected with main line 10 through valvular flue 11 is installed, and on the waste heat boiler 12 air-introduced machine 14 is installed.
The course of work of the present invention is following: after at first starting water supply pump 9, the cooling water leaving chilled water pond 8 about 54 ℃ gets in the cold water organ pipe 18 of main line 10, and overheating failure is lowered the temperature, avoided to cooling water to the relevant device of main line 10; After cooling water heat absorption back temperature is elevated to about 60 ℃, leaves cooling water pipe 18 and get into hot-tub 19; Heat-exchanger pump 20 is extracted about 60 ℃ cooling water out and is flowed to the female pipe 7 of high temperature water supply from hot-tub 19.Cooling water about 60 ℃ distributes through the female pipe 7 of high temperature water supply, enters into plate type heat exchanger 1, water chiller 2 and warm user side 6 and heat release respectively, is pooled to low temperature backwater mother pipe 5 after cooling water temperature is reduced to about 54 ℃, gets back to water cooling pond 8 at last.Cooling water is passed to heat source water through plate type heat exchanger 1 with low grade heat energy; Warm user side 6 during cooling water is directly supplied with heat; Cooling water is discharged into heat in the atmosphere through water chiller 2.Cooling water about 60 ℃ can pass through plate type heat exchanger 1, water chiller 2, middle temperature user side 6 separately; Also can pass through wherein the two; All right three's all-pass mistake, the pass-through mode of cooling water depends primarily on the thermic load demand of plate type heat exchanger 1 and middle temperature user side 6.
It is the cooling water heat exchange about 60 ℃ with temperature that described thermal source water pump 3 is delivered to plate type heat exchanger 1 with the normal temperature heat source water in the thermal source pond 4; When leaving plate type heat exchanger, heat source water more than the temperature increase to 55 ℃, is delivered to low temperature user side 16, waste heat boiler 12 again.Through waste heat boiler 12 further after the heating, heat source water temperature increase to 90-150 ℃ or higher, even be transformed into steam, these heat source waters with high-grade heat energy are delivered to high temperature user side 13.
The hot grade of described low temperature user side 16, middle temperature user side 6, high temperature user side 13 can have certain difference, satisfies the different hot grade demand of hot user.The hot grade demand different according to user side, the use of a certain user side also can connected or break off to the selectivity setting arbitrarily of above-mentioned different user side to increase the flexibility that cooling water heat is utilized, through switch different user end water inlet pipe valve.
In sum; The present invention is through being provided with plate type heat exchanger 1, waste heat boiler 12; And low temperature user side 16, middle temperature user side 6, high temperature user side 13; Can effective thermal source low-grade, that cooling water heat that be difficult to the direct main line of utilizing 10 is transformed into different grades both can have been satisfied the heat request of the different grades of hot user, realize again that the step of residual heat resources efficiently utilized.The present invention need not use the high-quality electric energy to promote the waste heat quality of cooling water; Only utilize the fume afterheat resource of main line 10; Can the residual heat resources of cooling water be promoted to 90-150 ℃ or higher, widen the scope of application of cooling water heat resource significantly, break through the restriction that the cooling water heat resource only is used for heat supply in winter fully; The heat recovery time of cooling water can extend to throughout the year, and the residual heat resources utilization rate can be near 100%.When the present invention normally moved, water chiller 2 need not put into operation, and had thoroughly solved water chiller 2 operation power consumption, water consumption and environmental thermal pollution problems.With respect to the simple heat supply in winter utilization of cooling water heat, and heat pump techniques, power savings advantages of the present invention is remarkable.
Can know that by technological general knowledge the present invention can realize through other the embodiment that does not break away from its spirit or essential feature.Therefore, above-mentioned disclosed embodiment with regard to each side, all just illustrates, and is not only.All within the scope of the present invention or the change in being equal to scope of the present invention all comprised by the present invention.
Technique effect of the present invention has:
1, the cooling water of hot-tub is directly led in warm user side heat supply, the low-temperature cooling water after the heat release enters into water cooling pond through the female pipe of low temperature backwater, cooling water recycles;
2, will from the cooling water of hot-tub with directly mix from the water at low temperature in thermal source pond the back to the heat supply of low temperature user side, this part cooling water does not reclaim;
3, the cooling water with hot-tub leads to plate type heat exchanger, utilizes the heat of cooling water to be used for the heat source water of external heat supply, and cooling water temperature is after the female pipe of low temperature backwater enters into water cooling pond, and cooling water recycles;
4, the heat source water after the plate type heat exchanger heating is directly supplied with the low temperature user side; Supply with the high temperature user side after perhaps improving hot quality through the waste heat boiler heating;
Pass through technique scheme; Not only realized the utilization of cooling water heat resource; Utilize the waste heat boiler that reclaims the main line fume afterheat to promote the grade of cooling water heat; Break through the conventional heat pump technology and only cooling water temperature has been risen to 85 ℃ restriction, utilized low-grade main line fume afterheat easily water temperature to be heated to 90-150 ℃ (suitably improving feed pump pressure).Water temperature is brought up to 90-150 ℃, and its scope of application widens significantly, be suitable for and also no longer be limited to heating period season, has solved thoroughly that the cooling water heat resource only can heat in the winter time, non-heating period can only be to the problem of airborne release.Through the user side of different energy sources grade is set, realized the cascade utilization of main line residual heat resources, improved the utilization ratio of residual heat resources.
5, when user side can consume the waste heat of all cooling waters, turn-off the pipeline valve that cooling water leads to water chiller; When not having hot user, turn-off the pipeline valve that cooling water leads to all user sides, the cooling water that directly will derive from hot-tub leads to water chiller; When user side only can consume the waste heat of part cooling water, suitably the pipeline valve of water chiller was led in adjustment, with the coupling cooling water to the thermal discharge of water chiller with to the thermal discharge of user side.
Adjust the flow of cooling water flow through adjustment associated conduit valve to distinct device; The final cooling water of realizing is to the thermal discharge of water chiller with to the thermal discharge of user side; Strengthened the operational flexibility of cooling water heat recovery system; Both effectively guaranteed cooling water to glass production line relevant device cooling effect, improved the safety in operation of glass production line, strengthened the utilization rate of cooling water heat resource simultaneously.
Can know that by technological general knowledge the present invention can realize through other the embodiment that does not break away from its spirit or essential feature.Therefore, above-mentioned disclosed embodiment with regard to each side, all just illustrates, and is not only.All within the scope of the present invention or the change in being equal to scope of the present invention all comprised by the present invention.

Claims (10)

1. production technology cooling water heat recovery system; It is characterized in that: comprise the cooling water pipe of installing in the main line (10) (18); The inlet of described cooling water pipe (18) is connected with water cooling pond (8); Outlet is connected with hot-tub (19); Hot-tub (19) is connected with the inlet of plate type heat exchanger (1), water chiller (2) and middle temperature user side (6) respectively through the high temperature female pipe of water supply (7); The outlet of plate type heat exchanger (1), water chiller (2) and middle temperature user side (6) is connected with water cooling pond (8) through the female pipe of low temperature backwater (5); Described plate type heat exchanger (1) also is connected with thermal source pond (4) through pipeline, and the heat source water of plate type heat exchanger (1) heating is connected with low temperature user side (16), high temperature user side (13) and waste heat boiler (12) respectively through thermal source water pipe (17), and described waste heat boiler (12) is connected with main line (10) through flue (11).
2. technology cooling water heat recovery system according to claim 1 is characterized in that: on described plate type heat exchanger (1) and the pipeline that thermal source pond (4) are connected thermal source water pump (3) is installed also; The import and export of the heat source water side of plate type heat exchanger (1) is equipped with the import and export valve respectively.
3. production technology cooling water heat recovery system according to claim 1 is characterized in that: on described water cooling pond (8) outlet conduit water supply pump (9) and water cooling pond outlet valve are installed also.
4. production technology cooling water heat recovery system according to claim 1; It is characterized in that: on the pipeline between described cooling water pipe (18) and the hot-tub (19) the hot-tub inlet valve is installed, and on the pipeline between hot-tub (19) and the high temperature female pipe of water supply (7), heat-exchanger pump 20 is installed.
5. production technology cooling water heat recovery system according to claim 1 is characterized in that: described high temperature supplies water and is provided with inlet valve on female pipe (7) and the pipeline that plate type heat exchanger (1), water chiller (2), middle temperature user side (6) are connected.
6. production technology cooling water heat recovery system according to claim 1 is characterized in that: on the export pipeline of described plate type heat exchanger (1), water chiller (2), middle temperature user side (6) outlet valve is installed all.
7. production technology cooling water heat recovery system according to claim 1 is characterized in that: on described plate type heat exchanger (1) and the thermal source water pipe (17) that low temperature user side (16), high temperature user side (13), waste heat boiler (12) are connected valve is installed all.
8. production technology cooling water heat recovery system according to claim 1 is characterized in that: on described waste heat boiler (12) and the flue (11) that main line (10) is connected valve is installed.
9. production technology cooling water heat recovery system according to claim 1 is characterized in that: described waste heat boiler (12) is gone up air-introduced machine (14) is installed.
10. production technology cooling water heat recovery system according to claim 1 is characterized in that: described thermal source water pipe (17) is connected with high temperature user side (13) through the heat source water bypass (15) that has valve; Thermal source water pipe (17) is connected with high temperature user side (13) through waste heat boiler (12).
CN2012101875158A 2012-06-07 2012-06-07 Production process cooling water waste heat recovery system Pending CN102721221A (en)

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CN2012101875158A CN102721221A (en) 2012-06-07 2012-06-07 Production process cooling water waste heat recovery system

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Application Number Priority Date Filing Date Title
CN2012101875158A CN102721221A (en) 2012-06-07 2012-06-07 Production process cooling water waste heat recovery system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103964521A (en) * 2013-01-30 2014-08-06 陈克秀 Energy-saving efficient system for heating process water
CN106942336A (en) * 2017-05-01 2017-07-14 徐齐越 A kind of butchering fowl of use industrial heat pump device is shedded new energy-saving process

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736646A1 (en) * 1987-10-29 1989-07-20 Hero Dr Ing Landmann Heat pump with compressor driven by a hot-gas machine without displacer
CN101603681A (en) * 2009-07-20 2009-12-16 成都南玻玻璃有限公司 Fume control system of float glass melting tank afterheat boiler
CN201521944U (en) * 2009-07-20 2010-07-07 成都南玻玻璃有限公司 Waste-heat boiler off-gas control apparatus for float glass smelting kiln
CN201568942U (en) * 2009-09-18 2010-09-01 江阴市华宏化纤有限公司 Device for recovering excess heat of flue gas
CN201589458U (en) * 2009-10-30 2010-09-22 中芯国际集成电路制造(上海)有限公司 Heat recovery device for cooling water
CN202648226U (en) * 2012-06-07 2013-01-02 何秀锦 Production technology cooling water surplus heat recovery system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736646A1 (en) * 1987-10-29 1989-07-20 Hero Dr Ing Landmann Heat pump with compressor driven by a hot-gas machine without displacer
CN101603681A (en) * 2009-07-20 2009-12-16 成都南玻玻璃有限公司 Fume control system of float glass melting tank afterheat boiler
CN201521944U (en) * 2009-07-20 2010-07-07 成都南玻玻璃有限公司 Waste-heat boiler off-gas control apparatus for float glass smelting kiln
CN201568942U (en) * 2009-09-18 2010-09-01 江阴市华宏化纤有限公司 Device for recovering excess heat of flue gas
CN201589458U (en) * 2009-10-30 2010-09-22 中芯国际集成电路制造(上海)有限公司 Heat recovery device for cooling water
CN202648226U (en) * 2012-06-07 2013-01-02 何秀锦 Production technology cooling water surplus heat recovery system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103964521A (en) * 2013-01-30 2014-08-06 陈克秀 Energy-saving efficient system for heating process water
CN106942336A (en) * 2017-05-01 2017-07-14 徐齐越 A kind of butchering fowl of use industrial heat pump device is shedded new energy-saving process

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Application publication date: 20121010