CN102914085B - Cooling water waste heat recycling system - Google Patents
Cooling water waste heat recycling system Download PDFInfo
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- CN102914085B CN102914085B CN201210438692.9A CN201210438692A CN102914085B CN 102914085 B CN102914085 B CN 102914085B CN 201210438692 A CN201210438692 A CN 201210438692A CN 102914085 B CN102914085 B CN 102914085B
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The invention discloses a cooling water waste heat recycling system, which comprises a cold water tank, a circulating pump A, a heat production device, a hot water tank, a circulating pump B, a variable frequency pump, a plate type heat exchanger A, a circulating pump C, a small water tank, a heat pump unit, a circulating pump D, a hot water tank, a water supply pump, a plate type heat exchanger B and a cooling tower. The cooling water waste heat recycling system transfers the energy of cooling water to the heat pump by using the plate type heat exchanger A, and then converts the low temperature heat transferred by the plate type heat exchanger into high temperature heat energy by using the heat pump, the water in the hot water tank is used as a carrier of the high temperature heat energy, and the temperature is up to 60 DEG C, so that the use occasions are increased. According to the cooling water waste heat recycling system, the heat supplied to the heat pump is indirectly adjusted by using the plate type heat exchanger A and the variable-frequency pump, so that the temperature of water entering the heat pump of a third internal circulation is stable and is less than 32 DEG C, and the service life of the heat pump as well as the reliability and stability of the waste heat recovery are ensured. The normal temperature water injected in the hot water tank firstly passes through the plate type heat exchanger B, so that the energy consumption in the waste heat recovery process is reduced.
Description
Technical field
The present invention relates to heat recovery technology, particularly relate to the residual neat recovering system that utilizes heat pump to reclaim cooling water heat.
Background technology
The industrial energy consumption of China accounts for the 62%-70% of total energy consumption, and wherein cooling water recirculation system energy consumption can account for the half of industrial production energy consumption.The only 30%-40% of efficiency of energy utilization of industry, the heat of nearly half is directly discharged in atmosphere by cooling water, has both wasted a large amount of heat energy, causes again environmental pollution.Because cooling water typical temperature is lower, generally, lower than 35 DEG C, belong to low-grade heat source, the occasion that can directly utilize is few, and this brings certain difficulty to waste heat recovery.Increasingly mature along with heat pump techniques, utilizes heat pump recovery waste heat to become a new method of waste heat recovery.
Existing cooling water waste heat recovering system is mainly to utilize heat transmission equipment (as heat exchanger) directly to carry out heat exchange.The process program principle of directly carrying out heat exchange with heat transmission equipment (as heat exchanger) as shown in Figure 1, retains original cooling system constant, in original cooling system, increases residual neat recovering system.The capital equipment of original cooling system comprises circulating pump, heat exchanger, cooling system, control system and pipeline etc.The transmittance process of its energy is: required cooling equipment---heat-source Cycles water---heat exchanger---recirculated water to be heated.
The major defect of this system: from the operation principle of heat exchanger, carry out in the process of heat exchange at heat exchanger, the temperature of recirculated water to be heated is necessarily less than the temperature of heat source water.If the temperature of heat source water is not high, the temperature of recirculated water to be heated can be lower, add the thermal loss in transmitting procedure, it is lower that the temperature of water can become, and value is not high, and the occasion that this scheme can directly be utilized in the waste heat recovery process of industrial colling is very limited.
Heat pump techniques is the new energy technology receiving much attention in the whole world in recent years.Heat pump is a kind of to consume the device of a part of low-grade energy as compensating, heat energy being transmitted from low-temperature heat source to high temperature heat source.Heat pump can be sent to high temp objects from cryogenic object by the heat energy of 3 to 4 times of self institute's energy requirement.Because heat pump can be converted to high temperature heat by low temperature heat energy, improve the effective rate of utilization of the energy, therefore become the important channel of reclaiming the energy storing in low temperature exhaust heat.
But heat pump is higher to the stability requirement of heat source water temperature, the temperature of heat source water can not be greater than 32 DEG C, and the speed of heat source water variations in temperature should be less than 1.1 DEG C/point.If the cooling water in industry is directly squeezed into source pump, usually can cause source pump cisco unity malfunction, the stability that therefore ensures source heat pump heat coolant-temperature gage is an emphasis in cooling water waste heat recovering system.
Summary of the invention
The problems referred to above that exist for solving prior art, the present invention will design a kind of cooling water waste heat recovering system that not only can utilize low-grade heat source but also can ensure source heat pump heat coolant-temperature gage stability.
To achieve these goals, technical scheme of the present invention is as follows: a kind of cooling water waste heat recovering system, comprises water cooling pond, circulating pump A, heating equipment, hot-tub, circulating pump B, variable frequency pump, plate type heat exchanger A, circulating pump C, little water tank, source pump, circulating pump D, boiler, supply-water pump, plate type heat exchanger B, cooling tower; The outlet of described water cooling pond connects circulating pump A, heating equipment and hot-tub successively by pipeline; Described hot-tub has two outlets, and its top outlet is connected to the entrance of water cooling pond through cooling tower by pipeline, and its underpart outlet is connected to the entrance of plate type heat exchanger A through variable frequency pump by pipeline; Described plate type heat exchanger A has two outlets, its left side outlet is connected to the entrance of water cooling pond through plate type heat exchanger B by pipeline, its right side outlet is connected to source pump by pipeline, described source pump has two outlets, the outlet of its underpart is connected to the entrance of plate type heat exchanger A through little water tank and circulating pump C by pipeline, its top outlet is connected to boiler by pipeline; Described boiler has two outlets, and its left side outlet is connected to the entrance of the bottom of source pump through circulating pump D by pipeline, and its right side outlet is connected with supply-water pump by pipeline; Described boiler also has an entrance, is connected with the outlet of plate type heat exchanger B by pipeline.
The course of work of the present invention comprises four circulations:
First circulation: water cooling pond---circulating pump A---heating equipment---hot-tub---circulating pump B---cooling tower---water cooling pond;
Second circulation: water cooling pond---circulating pump A---heating equipment---hot-tub---variable frequency pump---plate type heat exchanger A---plate type heat exchanger B---water cooling pond;
The 3rd circulation: little water tank---circulating pump C---the little water tank of plate type heat exchanger A---source pump---;
The 4th circulation: boiler---circulating pump D---source pump---boiler.
In second circulation, first the cooling water of the heating equipment in hot-tub passes through plate type heat exchanger A, by plate type heat exchanger A, the part heat in cooling water is passed to source pump; Cooling water flow can approximately reduce by 3 DEG C through its temperature of plate type heat exchanger A, and the temperature of cooling water is still higher, and cooling water passes through plate type heat exchanger B again, by plate type heat exchanger B, the heat in cooling water is passed to the normal-temperature water that will inject boiler.By plate type heat exchanger B, normal-temperature water is heated to more than 20 DEG C by 10 DEG C.Source pump can be heated to 60 DEG C from 20 DEG C by the water in boiler like this, and needn't be heated to 60 DEG C from 10 DEG C.Cooling water passes through plate type heat exchanger A and plate type heat exchanger B successively, energy in cooling water is carried out to cascade utilization, and the temperature of cooling water is reduced to greatest extent, the normal-temperature water that enters boiler is carried out to preheating simultaneously, improve the temperature of water to be heated, reduce the consumption of the energy of heating process.
In second circulation, utilize variable frequency pump need to supply water to plate type heat exchanger A according to source pump, even if heat source temperature is higher or the temperature fluctuation of thermal source is larger, the heat that adopts variable frequency pump to regulate plate type heat exchanger A to transmit, and then the water temperature that ensures to enter in the 3rd circulation heat pump keeps stable and lower than 32 DEG C, requirement to water temperature while meeting operation of heat pump, and ensure that heat pump moves efficiently.
Compared with prior art, the present invention has following beneficial effect:
1, the temperature of cooling water is lower conventionally, directly utilizes plate type heat exchanger to reclaim heat, and the heat temperature of recovery can be lower, adds the reduction of temperature in transmitting procedure, and its available occasion is very limited.The present invention utilizes plate type heat exchanger A that the energy of cooling water is passed to heat pump, then the low-temperature heat quantity by heat pump, plate type heat exchanger position being passed over is converted to high temperature heat, water in boiler is as the carrier of high temperature heat, its temperature can reach 60 DEG C, the occasion that the hot water of 60 DEG C utilizes in life and industrial production is a lot, it both can be used for bath water, also can be used for the heating in workshop in winter etc.
2, large (temperature is greater than 32 DEG C sometimes) of the temperature fluctuation of common cooling water, directly utilize heat pump (without plate type heat exchanger) to reclaim cooling water, can reduce greatly the service life of heat pump because of the fluctuation of water temperature; In the time that the temperature of cooling water is greater than 32 DEG C, the shutdown of heat pump meeting protectiveness, affects the normal operation of waste heat recovery.The present invention utilizes plate type heat exchanger A and variable frequency pump indirect regulation to supply with the heat of heat pump, and the temperature that makes the water of circulation in the 3rd enter the water of heat pump keeps stable, and lower than 32 DEG C, ensures the service life of heat pump and the reliability of waste heat recovery, stability.
3, normally normal-temperature water is directly injected to boiler for boiler moisturizing, injected the normal-temperature water temperature of boiler conventionally lower, and its temperature is still higher after part heat is passed to heat pump by the cooling water of the hot-tub of plate type heat exchanger A.The normal-temperature water of injecting boiler is first passed through plate type heat exchanger B by the present invention, absorbs the energy of the cooling water of the plate type heat exchanger A that flows through, and temperature obtains raising (its temperature is slightly less than the temperature of cooling water) to a certain extent.Like this normal-temperature water of injecting boiler is carried out to preheating, improve the temperature of the normal-temperature water of injecting boiler, both can fall the temperature of cooling water, can make again the water of heat pump boiler, make the water of boiler start heating from room temperature, and then reduce the consumption of the energy of waste heat recovery process.
Brief description of the drawings
2, the total accompanying drawing of the present invention, wherein:
Fig. 1 is existing cooling water waste heat recovering system structural representation.
Fig. 2 is cooling water waste heat recovering system structural representation of the present invention.
In figure: 1, water cooling pond; 2, circulating pump A; 3, heating equipment; 4, hot-tub; 5, circulating pump B; 6, variable frequency pump; 7, plate type heat exchanger A; 8, circulating pump C; 9, little water tank; 10, source pump; 11, circulating pump D; 12, boiler; 13, supply-water pump; 14, plate type heat exchanger B; 15, cooling tower.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.As shown in Figure 2, a kind of cooling water waste heat recovering system, comprises water cooling pond 1, circulating pump A2, heating equipment 3, hot-tub 4, circulating pump B5, variable frequency pump 6, plate type heat exchanger A7, circulating pump C8, little water tank 9, source pump 10, circulating pump D11, boiler 12, supply-water pump 13, plate type heat exchanger B14, cooling tower 15; The outlet of described water cooling pond 1 connects circulating pump A2, heating equipment 3 and hot-tub 4 successively by pipeline; Described hot-tub 4 has two outlets, and its top outlet is connected to the entrance of water cooling pond 1 through cooling tower 15 by pipeline, and its underpart outlet is connected to the entrance of plate type heat exchanger A7 through variable frequency pump 6 by pipeline; Described plate type heat exchanger A7 has two outlets, its left side outlet is connected to the entrance of water cooling pond 1 through plate type heat exchanger B14 by pipeline, its right side outlet is connected to source pump 10 by pipeline, described source pump 10 has two outlets, the outlet of its underpart is connected to the entrance of plate type heat exchanger A7 through little water tank 9 and circulating pump C8 by pipeline, its top outlet is connected to boiler 12 by pipeline; Described boiler 12 has two outlets, and its left side outlet is connected to the entrance of the bottom of source pump 10 through circulating pump D11 by pipeline, and its right side outlet is connected with supply-water pump 13 by pipeline; Described boiler 12 also has an entrance, is connected with the outlet of plate type heat exchanger B14 by pipeline.
The course of work of the present invention comprises four circulations:
First circulation: water cooling pond 1---circulating pump A2---heating equipment 3---hot-tub 4---circulating pump B5---cooling tower 15---water cooling pond 1;
Second circulation: water cooling pond 1---circulating pump A2---heating equipment 3---hot-tub 4---variable frequency pump 6---plate type heat exchanger A7---plate type heat exchanger B14---water cooling pond 1;
The 3rd circulation: little water tank 9---circulating pump C8---the little water tank 9 of plate type heat exchanger A7---source pump 10---;
The 4th circulation: boiler 12---circulating pump D11---source pump 10---boiler 12.
In second circulation, first the cooling water of the heating equipment 3 in hot-tub 4 passes through plate type heat exchanger A7, by plate type heat exchanger A7, the part heat in cooling water is passed to source pump 10; Cooling water flow can approximately reduce by 3 DEG C through its temperature of plate type heat exchanger A7, and the temperature of cooling water is still higher, and cooling water passes through plate type heat exchanger B14 again, by plate type heat exchanger B14, the heat in cooling water is passed to the normal-temperature water that will inject boiler 12.By plate type heat exchanger B14, normal-temperature water is heated to more than 20 DEG C by 10 DEG C.Source pump 10 can be heated to 60 DEG C from 20 DEG C by the water in boiler 12 like this, and needn't be heated to 60 DEG C from 10 DEG C.Cooling water passes through plate type heat exchanger A7 and plate type heat exchanger B14 successively, energy in cooling water is carried out to cascade utilization, the temperature of cooling water is reduced to greatest extent, the normal-temperature water that enters boiler 12 is carried out to preheating simultaneously, improve the temperature of water to be heated, reduce the consumption of the energy of heating process.
In second circulation, utilize variable frequency pump 6 need to supply water to plate type heat exchanger A7 according to source pump 10, even if heat source temperature is higher or the temperature fluctuation of thermal source is larger, the heat that adopts variable frequency pump 6 to regulate plate type heat exchanger A7 to transmit, and then the water temperature that ensures to enter in the 3rd circulation heat pump keeps stable and lower than 32 DEG C, requirement to water temperature while meeting operation of heat pump, and ensure that heat pump moves efficiently.
Claims (1)
1. a cooling water waste heat recovering system, comprise water cooling pond (1), circulating pump A(2), heating equipment (3), hot-tub (4), circulating pump B(5), variable frequency pump (6), plate type heat exchanger A(7), circulating pump C(8), boiler (12), supply-water pump (13) and cooling tower (15), it is characterized in that: also comprise little water tank (9), source pump (10), circulating pump D(11) and plate type heat exchanger B(14); The outlet of described water cooling pond (1) connects circulating pump A(2 successively by pipeline), heating equipment (3) and hot-tub (4); Described hot-tub (4) has two outlets, the outlet of its top by pipeline through circulating pump B(5) and cooling tower (15) be connected to the entrance of water cooling pond (1), its underpart exports and is connected to plate type heat exchanger A(7 by pipeline through variable frequency pump (6)) entrance; Described plate type heat exchanger A(7) there are two outlets, its left side outlet by pipeline through plate type heat exchanger B(14) be connected to the entrance of water cooling pond (1), its right side outlet is connected to source pump (10) by pipeline, described source pump (10) has two outlets, the outlet of its underpart by pipeline through little water tank (9) and circulating pump C(8) be connected to plate type heat exchanger A(7) and entrance, its top outlet is connected to boiler (12) by pipeline; Described boiler (12) has two outlets, its left side outlet by pipeline through circulating pump D(11) be connected to the entrance of the bottom of source pump (10), its right side outlet is connected with supply-water pump (13) by pipeline; Described boiler (12) also have an entrance, by pipeline and plate type heat exchanger B(14) outlet be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438692.9A CN102914085B (en) | 2012-11-06 | 2012-11-06 | Cooling water waste heat recycling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438692.9A CN102914085B (en) | 2012-11-06 | 2012-11-06 | Cooling water waste heat recycling system |
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| CN102914085A CN102914085A (en) | 2013-02-06 |
| CN102914085B true CN102914085B (en) | 2014-08-27 |
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| CN201210438692.9A Expired - Fee Related CN102914085B (en) | 2012-11-06 | 2012-11-06 | Cooling water waste heat recycling system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234305B (en) * | 2013-05-07 | 2015-12-09 | 江苏河海新能源股份有限公司 | Heat circulation unit |
| CN103398414A (en) * | 2013-07-17 | 2013-11-20 | 大连兆和科技发展有限公司 | Industrial cooling water waste heat recycling system |
| CN105576943B (en) * | 2014-10-13 | 2018-08-28 | 国家电网公司 | A kind of high voltage direct current converter valve heat recovery system and its implementation |
| CN106338159A (en) * | 2016-10-14 | 2017-01-18 | 深圳万发创新进出口贸易有限公司 | Cooling water waste heat recovery system |
| CN109186300B (en) * | 2018-08-17 | 2020-01-10 | 山东禹王生态食业有限公司 | Waste heat utilization system |
| CN115517326A (en) * | 2022-08-15 | 2022-12-27 | 杭州娃哈哈精密机械有限公司 | Energy-saving multistage formula tunnel sprays sterilization system |
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| CN201229092Y (en) * | 2008-07-02 | 2009-04-29 | 陈卫东 | Air source waste heat energy recovering dual-purpose heat pump unit |
| KR20100122325A (en) * | 2009-05-12 | 2010-11-22 | 전충희 | Apparatus for recovering the heat from the waste water |
| CN201852360U (en) * | 2010-11-09 | 2011-06-01 | 北京矿大节能科技有限公司 | Heat pump system for recycling cooling water waste heat of power plant |
| CN202158658U (en) * | 2011-06-23 | 2012-03-07 | 武汉朗肯节能技术有限公司 | Heat recovery device of waste water source heat pump high-temperature hot-water unit |
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2012
- 2012-11-06 CN CN201210438692.9A patent/CN102914085B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201229092Y (en) * | 2008-07-02 | 2009-04-29 | 陈卫东 | Air source waste heat energy recovering dual-purpose heat pump unit |
| KR20100122325A (en) * | 2009-05-12 | 2010-11-22 | 전충희 | Apparatus for recovering the heat from the waste water |
| CN201852360U (en) * | 2010-11-09 | 2011-06-01 | 北京矿大节能科技有限公司 | Heat pump system for recycling cooling water waste heat of power plant |
| CN202158658U (en) * | 2011-06-23 | 2012-03-07 | 武汉朗肯节能技术有限公司 | Heat recovery device of waste water source heat pump high-temperature hot-water unit |
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Owner name: JIAOTONG UNIVERSITY QILAI JIE'ER HIGH TECHNOLOGY ( Free format text: FORMER OWNER: DALIAN JIAOTONG UNIVERSITY Effective date: 20150311 |
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Free format text: CORRECT: ADDRESS; FROM: 116028 DALIAN, LIAONING PROVINCE TO: 116045 DALIAN, LIAONING PROVINCE |
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Effective date of registration: 20150311 Address after: 116045 No. 1, Chuangxin Road, Lushunkou District, Liaoning, Dalian Patentee after: Chi Eli Jeal Gauk (Dalian) Co., Ltd. Address before: 116028 the Yellow River Road, Shahekou District, Liaoning, No. 794, No. Patentee before: Dalian Jiaotong University |
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