CN106403453A - Zero discharge type circulating water cooling system - Google Patents

Zero discharge type circulating water cooling system Download PDF

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Publication number
CN106403453A
CN106403453A CN201611036409.4A CN201611036409A CN106403453A CN 106403453 A CN106403453 A CN 106403453A CN 201611036409 A CN201611036409 A CN 201611036409A CN 106403453 A CN106403453 A CN 106403453A
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China
Prior art keywords
cooling system
cooler
circulating water
zero
extender
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CN201611036409.4A
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张惊涛
陈小林
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Chengdu Sepmem Sci & Tech Co Ltd
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Chengdu Sepmem Sci & Tech Co Ltd
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Priority to CN201611036409.4A priority Critical patent/CN106403453A/en
Publication of CN106403453A publication Critical patent/CN106403453A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/06Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

The invention discloses a zero discharge type circulating water cooling system and relates to the technical field of cooling. The circulating water cooling system comprises an inner circulating cooling system and an outer circulating cooling system for providing cooling capacity for the inner circulating cooling system; a working medium of the inner circulating cooling system is cooling water; the inner circulating cooling system comprises a circulating water pipeline, a first cooler for cooling a thermal medium, a second cooler for cooling the cooling water as well as a circulating pump for driving the cooling water to flow in the circulating water pipeline, and the first cooler, the second cooler and the circulating pump are mounted on the circulating water pipeline; a working medium of the outer circulating cooling system is a coolant; and the outer circulating cooling system comprises a coolant circulating pipeline as well as a coolant circulating device, a coolant cooler and a pressure reducer which are mounted on the coolant circulating pipeline. The system has the good and stable cooling effect, can realize zero discharge of waste water, is environment-friendly and can save water resources and the cost.

Description

A kind of zero-emission type circulating water cooling system
Technical field
The present invention relates to cooling technology field, in particular to a kind of zero-emission type circulating water cooling system.
Background technology
For cooling technology field, because the used heat of factory is more, need substantial amounts of recirculated cooling water, such as using conventional work Skill, then the consumption of raw water and the discharge capacity of waste water are huge, and water rate and cost of water treatment are high.
Additionally, being limited to the raw material place of production, some factories typically build in northwest water-deficient area, substantial amounts of water demand Make plant condition harsh.
In today that water resource is day by day in short supply, huge water consumption seriously hinders and constrains the development of enterprise.Although it is big Cooling water is changed to recirculated cooling water by Some Enterprises, but it is still very big to supplement fresh water amount.
Generally 30 DEG C~35 DEG C of existing circulating water cooling system inflow temperature, for preventing equipment serious scale, backwater temperature Below 50 DEG C, this leads to cooling circulating water amount very big to degree temperature general control, and its water consumption accounts for the 85%- of enterprise water use 92%, power load accounts for the 20%-30% of total electricity consumption.And the increase with cycle-index, water quality deterioration, hardness uprises, and holds Easy occluding device pipeline simultaneously makes cooling effect substantially reduce, and needs persistently discharge recirculated water, and supplements substantial amounts of new recirculated water, sternly Weight waste water resource.The antisludging agent that contains in recirculated water, antibacterial, such as phosphate etc., outside undressed recirculated water, row will be right Environment does great damage.
With the increasingly stringent of environmental requirement, recycling waste water discharge has become the emphasis of each environmental protection of enterprise regulation, each land Explicit order newly-built enterprise in mansion must realize wastewater zero discharge, but carries out zero to the recirculated cooling water waste water in existing cooling system Discharge transformation, need to carry out permeating, the technique salt extraction such as concentrate, evaporate, being dried, greatly increase the operating cost of circulating cooling system.
In addition, in regular circulation technique, using shell-and-tube heat exchanger, cooler is made up of multiple heat exchangers, is Consider that what circulating water cooling system ran is uniformly coordinated, and prevent high-temperature scaling, cooling water enters the temperature one of each cooler As be 30 DEG C~32 DEG C, go out generally 40 DEG C~42 DEG C of the temperature of each cooler, only 10 DEG C of cooling water temperature rise, under same load, Temperature rise is less, and circulating load is bigger, and the volume of equipment and investment are all very big.
Content of the invention
It is an object of the invention to provide a kind of zero-emission type circulating water cooling system, its good refrigeration effect and refrigeration Stable, wastewater zero discharge, environmental friendliness, saving water resource and operating cost.
Embodiments of the invention are realized in:
A kind of zero-emission type circulating water cooling system, it includes interior circulation cooling system and is used for as interior circulation cooling system The external circulation cooling system of cold is provided.The working media of interior circulation cooling system is cooling water, and interior circulation cooling system includes Circulating water line and be installed on circulating water line the first cooler for cooling down thermal medium, for cool down cooling water the Two coolers and the circulating pump for driving cooling water to flow in circulating water line.The working media of external circulation cooling system is Cold-producing medium, external circulation cooling system includes refrigerant circulation line and the refrigerant cycle dress being installed on refrigerant circulation line Put, refrigerant cooler and decompressor.
Further, in the preferred embodiment of the present invention, according to cooling water circulating water line flow direction, second is cold But the upstream of device is additionally provided with air precooler.
Further, in the preferred embodiment of the present invention, refrigerant cycle apparatus include compressor, the second cooler Refrigerant outlet and compressor inlet communication, the outlet of compressor and the inlet communication of refrigerant cooler.
Further, in the preferred embodiment of the present invention, cold-producing medium be ammonia, nitrogen, methane, ethane, ethylene, third Any one in alkane, propylene, butane, pentane and freon.
Further, in the preferred embodiment of the present invention, refrigerant cycle apparatus include absorber, solution pump and use In the generator carrying out heat exchange with thermal medium, cold-producing medium is absorbing liquid and combining of circulating agent.The outlet of the second cooler with The inlet communication of absorber, the outlet of absorber is connected by solution pump with the import of generator, the refrigerant outlet of generator with The inlet communication of refrigerant cooler, the absorbing liquid outlet of generator and the absorbing liquid inlet communication of absorber.
Further, in the preferred embodiment of the present invention, absorbing liquid is water and circulates agent for ammonia;Or absorbing liquid is Lithium bromide and circulate agent be water.
Further, in the preferred embodiment of the present invention, external circulation cooling system also includes extender cycling element; The working media of extender cycling element is extender.Extender cycling element includes decompressor, extender cooler, booster pump With the vaporizer carrying out heat exchange for extender and thermal medium.The outlet of decompressor and the inlet communication of extender cooler, The outlet of extender cooler is connected by booster pump with the extender entrance of vaporizer, and the extender of vaporizer exports and decompressor Inlet communication;The power output portion of decompressor is connected with the compression power input unit of compressor.
Further, in the preferred embodiment of the present invention, external circulation cooling system also includes extender cycling element; Extender cycling element includes decompressor, booster pump and the vaporizer carrying out heat exchange for extender and thermal medium;Decompressor Outlet and refrigerant cooler inlet communication, the extender import of vaporizer and the outlet of refrigerant cooler are by booster pump Connection, the extender outlet of vaporizer is connected with expander inlet;The power output portion of decompressor and the compression power of compressor Input unit connects.
Further, in the preferred embodiment of the present invention, it is provided between vaporizer and the first cooler and is situated between for heat The arm that matter is passed through, arm connects the thermal medium outlet of vaporizer and the thermal medium inlet of the first cooler.
Further, in the preferred embodiment of the present invention, the first cooler is plate-fin heat exchanger.
The beneficial effect of the embodiment of the present invention is:By arranging the interior circulation cooling system matching and outer circulation cooling system System, the cooling water of external circulation cooling system inner loop cooling system has cooling effect again so that interior circulation cooling system can To provide enough colds for thermal medium, improve the cooling effect to thermal medium for the interior circulation cooling system.
Because external circulation cooling system inner loop cooling system has cooling Stabilization so that interior circulation cooling system Cooling water can be adequately cooled after providing cold for thermal medium and supplement sufficient cold, interior circulation can be made Cooling system, in the case of lasting cooling work, still ensures that interior circulation cooling system has normal refrigeration, improves The overall refrigeration stability of zero-emission type circulating water cooling system.Further, since zero-emission type circulating water cooling system is overall For circulating cooling, circulating water uses, and greatly reduces the consumption of cooling water, saving water resource and operating cost;And it is cold But water is recycled due to repeatable, can reach wastewater zero discharge, prevent the pollution of the environment.
The zero-emission type circulating water cooling system being provided using the application, can greatly reduce cooling water water consumption, and can Reach wastewater zero discharge, prevent from polluting, make water-deficient area and the high area of environmental requirement also can meet plant condition.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to use required in embodiment Figure is briefly described it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this A little accompanying drawings obtain other related accompanying drawings.
The schematic diagram of the zero-emission type circulating water cooling system that Fig. 1 provides for the embodiment of the present invention 1;
The schematic diagram of the zero-emission type circulating water cooling system that Fig. 2 provides for the embodiment of the present invention 2;
First cooler of the zero-emission type circulating water cooling system that Fig. 3 provides for the embodiment of the present invention 2 is changed by shell-and-tube Schematic diagram after hot device replacement;
The schematic diagram of the zero-emission type circulating water cooling system that Fig. 4 provides for the embodiment of the present invention 3;
The schematic diagram of the zero-emission type circulating water cooling system that Fig. 5 provides for the embodiment of the present invention 4.
Icon:100- zero-emission type circulating water cooling system;110- interior circulation cooling system;111- circulating water line; 112- first cooler;113- second cooler;114- circulating pump;115- air precooler;120- external circulation cooling system; 121- refrigerant circulation line;122- refrigerant cycle apparatus;122a- compressor;123- refrigerant cooler;124- reduces pressure Device;200- zero-emission type circulating water cooling system;220- external circulation cooling system;222- extender cycling element;222a- expands Machine;222b- extender cooler;222c- booster pump;222d- vaporizer;300- zero-emission type circulating water cooling system;320- External circulation cooling system;322- extender cycling element;322a- decompressor;322b- booster pump;322c- vaporizer;324- props up Pipe;400- zero-emission type circulating water cooling system;420- external circulation cooling system;422- refrigerant cycle apparatus;422a- absorbs Device;422b- solution pump;422c- generator.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is The a part of embodiment of the present invention, rather than whole embodiments.The present invention generally described and illustrated in accompanying drawing herein is implemented The assembly of example can be arranged with various different configurations and design.
Therefore, below the detailed description of the embodiments of the invention providing in the accompanying drawings is not intended to limit claimed The scope of the present invention, but be merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, this area is common The every other embodiment that technical staff is obtained under the premise of not making creative work, broadly falls into the model of present invention protection Enclose.
It should be noted that:Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then do not need it to be defined further and explains in subsequent accompanying drawing.
Embodiment 1
Refer to Fig. 1, present embodiments provide a kind of zero-emission type circulating water cooling system 100.This zero-emission type follows Ring water cooling system 100 includes interior circulation cooling system 110 and external circulation cooling system 120.The work of interior circulation cooling system 110 Making medium is cooling water, and the working media of external circulation cooling system 120 is cold-producing medium.External circulation cooling system 120 is followed using it The cooling water of the cold-producing medium inner loop cooling system 110 that ring uses is cooled down, to improve the system of interior circulation cooling system 110 Cold effect.Zero-emission type circulating water cooling system 100 is enclosed system on the whole, generally circulating cooling pattern.Cooling The recycling of water, not only reduces the consumption of raw water, saving water resource with operating cost it is thus also avoided that the discharge of cooling water, The raw water zero achieving zero-emission type circulating water cooling system 100 consumes and wastewater zero discharge, not only economizes on resources and can also prevent Only pollute.
Further, in the present embodiment, the interior circulation cooling system 110 of zero-emission type circulating water cooling system 100 Cooling water is desalted water.Fouling can be prevented using desalted water, because zero-emission type circulating water cooling system 100 is enclosed System, therefore the amount of the desalted water in interior circulation cooling system 110 is basically unchanged, interior all can reach prevents fouling for a long time Purpose, advantageously ensures that the stability of cooling effect of zero-emission type circulating water cooling system 100 the use longevity of extension device Life.
It should be noted that in other embodiments of the invention, the cooling water of interior circulation cooling system 110 can also be Other coolants outside desalted water.
Further, in the present embodiment, external circulation cooling system 120 is used for the cooling for interior circulation cooling system 110 Water extraction semen donors.Interior circulation cooling system 110 include circulating water line 111 and be installed on circulating water line 111 for cold But the first cooler 112 of thermal medium, for cooling down the second cooler 113 of cooling water and be used for driving cooling water in recirculated water The circulating pump 114 of flowing in pipeline 111.External circulation cooling system 120 includes refrigerant circulation line 121 and is installed on refrigeration The refrigerant cycle apparatus 122 of agent circulation line 121, refrigerant cooler 123 and decompressor 124.
Interior circulation cooling system 110 and external circulation cooling system 120 all achieve to working media recycle so that Zero-emission type circulating water cooling system 100 improves it to greatest extent and recycles ability, has reached wastewater zero discharge.Not only Economize in raw materials, also very friendly to environment.
Further, in the present embodiment, along cooling water in the flow direction of circulating water line 111, with the first cooler 112 it is Starting point, is followed successively by the first cooler 112, the second cooler 113 and circulating pump 114.
Specifically, in the present embodiment, the cooling water of the coolant outlet of the first cooler 112 and the second cooler 113 Import is connected by circulating water line 111;The coolant outlet of the second cooler 113 and the import of circulating pump 114 are by circulating water pipe Road 111 connects;The outlet of circulating pump 114 is connected by circulating water line 111 with the cooling water inlet of the first cooler 112.
The cyclic process with the first cooler 112 as starting point for the cooling water is:Cooling water is in the first cooler 112 and thermal medium Enter the second cooler 113 after carrying out heat exchange to be cooled down, cooling water after cooling is in the Circulation power of circulating pump 114 Promotion under return the first cooler 112 and again participate in heat exchange.
After cooling water provides cold for thermal medium, cool down through the second cooler 113, cooling water can be made to become cold again Medium be again to provide the cold of abundance it is ensured that the system of interior circulation cooling system 110 through the thermal medium of the first cooler 112 The stability of cold effect.
Further, in the present embodiment, according to cooling water circulating water line 111 flow direction, the second cooler 113 Upstream is additionally provided with air precooler 115.Air precooler 115 is between the first cooler 112 and the second cooler 113.
Specifically, the coolant outlet of the first cooler 112 and the import of air precooler 115 are by circulating water line 111 Connection;The outlet of air precooler 115 is connected by circulating water line 111 with the cooling water inlet of the second cooler 113.
Inventors herein have recognized that:The key factor of the power of decision air precooler 115 is air precooler 115 Outlet temperature and the temperature difference of ambient temperature.The temperature difference reduces, and air precooler 115 power is substantially increased.External circulation cooling system 120 Setting the outlet temperature of air precooler 115 is improved, increase outlet temperature and the environment of air precooler 115 The temperature difference of temperature, reduces the load of air precooler 115, effectively reduces the power consumption of air precooler 115.
It should be noted that in other embodiments of the invention, circulating pump 114 can be installed on the first cooler 112 Coolant outlet at, be also mountable to the exit of air precooler 115.
Further, in the present embodiment, the first cooler 112 is plate-fin heat exchanger.Plate-fin heat exchanger allows many Stock thermal medium and desalted water heat exchange simultaneously, reduce the quantity of cooler in factory, reduce equipment investment.Additionally, the first cooler 112 adopt plate-fin heat exchanger, also have the advantages that in unit volume, heat exchange area is big, heat exchange efficiency is high, compact conformation.
The present embodiment adopts plate-fin heat exchanger as the first cooler 112, and cooling water is desalted water, there is not fouling The outlet temperature of risk, therefore cooling water can reach 60 DEG C~80 DEG C, imports and exports the temperature difference up to 30 DEG C~50 DEG C, significantly reduces The cooling water inflow of circulation, decreases equipment scale and cost of investment.Plus plate-fin heat exchanger, there is heat-transfer surface in unit volume Long-pending big, heat exchange efficiency is high, compact conformation the advantages of, therefore in the present embodiment, generally, using a platen fin heat exchanger Can ensure that heat exchange is normally carried out as the first cooler 112, cooler quantity in factory is so greatly reduced, reduce Equipment investment.
Further, in the present embodiment, refrigerant cycle apparatus 122 include compressor 122a.
Further, the second cooler 113 is heat exchanger, and the second cooler 113 has the cooling passed through for cooling water Water lines and the refrigerant line passing through for cold-producing medium, that is, in the second cooler 113, cold-producing medium provides cold for cooling water Amount completes the cooling to cooling water.Interior circulation cooling system 110 and external circulation cooling system 120 using the second cooler 113 as Joint.
Specifically, the refrigerant outlet of the second cooler 113 and the import of compressor 122a are by refrigerant circulation line 121 Connection, the outlet of compressor 122a is connected by refrigerant circulation line 121 with the import of refrigerant cooler 123.Cold-producing medium is cold But between the outlet of device 123 and the refrigerant inlet of the second cooler 113, decompressor 124, the going out of refrigerant cooler 123 are set Mouth is connected by refrigerant circulation line 121 with the import of decompressor 124, the system exporting with the second cooler 113 of decompressor 124 Cryogen import is connected by refrigerant circulation line 121.
Further, in the present embodiment, cold-producing medium be ammonia, nitrogen, methane, ethane, ethylene, propane, propylene, butane, Any one in pentane and freon.
The cyclic process with the second cooler 113 as starting point for the cold-producing medium is:Gaseous refrigerant is by the system of the second cooler 113 Cryogen outlet is flowed out, and enters refrigerant cooler 123 and is condensed into liquid phase, liquid phase refrigerant is through subtracting after entering compressor 122a supercharging Reenter the second cooler 113 after depressor 124 decompression and participate in heat exchange, in the second cooler 113, liquid phase refrigerant absorbs Heat in cooling water and be gasificated into vapor phase refrigerant, and flow out from the refrigerant outlet of the second cooler 113, complete refrigeration and follow Ring.
Due to the further cooling effect of the cooling water of external circulation cooling system 120 inner loop cooling system 110, improve Second cooler 113 is to the cooling effect of cooling water so that cooling number is can fully be cooled down it is ensured that by circulating pump The cooling waters of 114 return the first coolers 112 can provide sufficient cold for thermal medium it is ensured that thermal medium obtain sufficiently cold But, further increase the cooling of the cooling effect to thermal medium for the interior circulation cooling system 110 and interior circulation cooling system 110 The stability of effect.The overall cooling effect of zero-emission type circulating water cooling system 100 is stable, the sustainable cold providing abundance, Will not be occurred due to the prolongation of cool time cooling water mean temperature raise situation it is ensured that cooling stability.
Inventors herein have recognized that:When the cooling water temperature of the import of air precooler 115 is of about 40 DEG C, by carrying The outlet temperature of high air precooler 115 and make the inlet temperature of air precooler 115 and the temperature difference of outlet temperature by 10 DEG C When being reduced to 5 DEG C, the power consumption incrementss of external circulation cooling system 120 are significantly less than the power consumption decrement of air precooler 115, that is, Total power consumption of zero-emission type circulating water cooling system 100 has obvious reduction.Particularly when air precooler 115 outlet temperature with When the ambient temperature temperature difference is less, the power of air precooler 115 sharply increases, and the application passes through setting the second cooler 113 can To improve the outlet temperature of air precooler 115, to reduce the unnecessary waste of energy of air precooler 115, drop simultaneously Low power consumption.The power consumption of zero-emission type circulating water cooling system 100 has obtained abundant reduction, has saved operating cost.
In the present embodiment, use high temperature section cooling, such as more than 35 DEG C of warm area, using air precooler 115 Cooling is larger with the temperature difference of ambient temperature due to outlet temperature, and under identical cooling load, the power consumption of air precooler 115 is less than pressure The cold power consumption of contraction.For the low-temperature zone cooling close with ambient temperature, such as less than 35 DEG C of warm area, due to heat transferring medium temperature Degree is less with circumstance of temperature difference, and under identical cooling load, air precooler 115 power consumption is much larger than the power consumption of compression refrigeration.
The cooling scheme that embodiments of the invention provide is that air precooler 115, the second cooler 113 and outer circulation are cold But the comprehensive refrigeration system of system 120, provides high temperature section refrigeration using air precooler 115, and external circulation cooling system 120 provides Low-temperature zone is freezed, both combinations, reduces the overall power consumption of zero-emission type circulating water cooling system 100 to the full extent.Significantly Reduce the power consumption cost of refrigeration.
It should be noted that in other embodiments of the invention, refrigerant cycle apparatus 122 can also be by multiple pressures Contracting machine 122a parallel combination forms.
Existing refrigeration system is all generally used for preparation and is less than 0 DEG C, or even less than -10 DEG C of low temperature, and the present embodiment The problem faced by zero-emission type circulating water cooling system 100 providing is to need to prepare 20~40 DEG C of high-temperature region.I.e. interior circulation Cooling system 110 is directly used in the high-temperature region of 20~40 DEG C of preparation, and external circulation cooling system 120 is used for cooling down interior circulation cooling system The cooling water of system 110.
Generally, the cryogenic temperature of external circulation cooling system 120 is 0 DEG C~40 DEG C, belongs to high-temperature region refrigeration, and low Warm area refrigeration is compared, high cooling efficiency, and condensation temperature is also of a relatively high, and external circulation cooling system 120 energy-saving benefit is good.Additionally, For interior circulation cooling system 110, interior circulation cooling system 110 is used for the high-temperature region of 20~40 DEG C of preparation, and cooling water exists The outlet temperature of air precooler 115 is of a relatively high, and the condensation temperature of external circulation cooling system 120 is of a relatively high, energy-saving benefit Preferably.
The operation principle of zero-emission type circulating water cooling system 100 is:After cooling water provides cold for thermal medium, through sky Gas precooler 115 and the dual-cooled of the second cooler 113, make cooling water again can provide sufficient cold for thermal medium. Particularly external circulation cooling system 120 to the cooling effect again of cooling water so that cooling water is sufficiently cool and obtain enough cold Amount, makes cooling water can provide sufficient cold for thermal medium, improves the cooling effect of interior circulation cooling system 110.
Zero-emission type circulating water cooling system 100 generally circulating cooling pattern, circulating water uses, and greatly reduces The consumption of cooling water, saving water resource and operating cost.Cooling water is recycled due to repeatable, and no waste water produces, Ke Yida To wastewater zero discharge, prevent the pollution of the environment.The zero-emission type circulating water cooling system 100 being provided using the present embodiment, can be significantly Reduce cooling water amount, and can reach wastewater zero discharge, prevent from polluting, make water-deficient area and the high area of environmental requirement Plant condition can be met.
Embodiment 2
Refer to Fig. 2, a kind of zero-emission type circulating water cooling system 200 that the present embodiment provides.Zero-emission type recirculated water What cooling system 200 was different with zero-emission type circulating water cooling system 100 is:Zero-emission type circulating water cooling system 200 External circulation cooling system 220 also include extender cycling element 222;The working media of extender cycling element 222 is to expand Agent.
Further, in the present embodiment, extender cycling element 222 includes decompressor 222a, extender cooler 222b, booster pump 222c and the vaporizer 222d carrying out heat exchange for extender and thermal medium.The outlet of decompressor 222a with The inlet communication of extender cooler 222b, the outlet of extender cooler 222b and the extender entrance of vaporizer 222d are by increasing Press pump 222c connects, and the extender of vaporizer 222d exports the inlet communication with decompressor 222a.The power of decompressor 222a is defeated Go out portion to be connected with the compression power input unit of compressor 122a.
Further, extender can be ammonia, nitrogen, methane, ethane, ethylene, propane, propylene, butane, pentane and fluorine profit Any one in high, in the present embodiment, the extender of extender cycling element 222 is propane.
Further, in the present embodiment, the power output shaft of decompressor 222a is defeated with the compression power of compressor 122a Enter axle coaxially connected.
The cyclic process with booster pump 222c as starting point for the extender is:Liquid phase extender intensified pump 222c supercharging is laggard Enter vaporizer 222d, extender is converted into high pressure vapor after vaporizer 222d absorbs the heat of thermal medium, enters back into expansion Machine 222a carries out expansion work, temperature drop and reduced pressure after extender expansion work, and it is cold that subsequent extender enters extender But device 222b is condensed into liquid phase state, and liquid phase extender enters booster pump 222c again carries out supercharging becomes high-pressure liquid phase expansion Agent, and then Returning evaporimeter 222d carries out heat exchange with thermal medium.
When extender expands in decompressor 222a and externally does work, the power that its work done passes through decompressor 222a is defeated Go out portion to conduct to the compression power input unit of compressor 122a, provide power for compressor 122a, define " expansion-compression " Complementary energy saver mode, reduces the power consumption of compressor 122a to a certain extent, has saved the energy and operating cost.
In vaporizer 222d, extender can absorb heat, provides cold for thermal medium, vaporizer 222d can be used for cold But thermal medium or absorption industrial waste heat, not only fully serve refrigeration endothermic effect, also make whole zero-emission type circulating water System 200 can realize the supplement of the energy consumption of the compressor 122a to itself using industrial heat, takes full advantage of industry surplus Complementary energy source, substantially increases the utilization rate of the energy, cost-effective.Further, since vaporizer 222d can be used for absorbing heat Jie The heat of matter, and for thermal medium provide cold, therefore zero-emission type circulating water cooling system 200 have more preferable cooling effect and Energy utilization rate is higher, more energy-conservation.
It should be noted that in other embodiments of the invention, the first cooler 112 can also be arranged in parallel by multiple Shell-and-tube heat exchanger substitute, as shown in Figure 3.In actual application, for super-huge device, due to plant area relatively Greatly, each heat exchange unit is apart from each other, if whole thermal mediums are all introduced in plate-fin heat exchanger, the runner mistake of each thermal medium Long, resistance drop is excessive, so carrying out cooling down advantageously with shell-and-tube heat exchanger respectively.
The operation principle of zero-emission type circulating water cooling system 200 is:By arranging the complementary energy-conservation mould of " expansion-compression " Formula, the extender of extender cycling element 222 absorbs thermal medium heat or industrial waste heat in vaporizer 222d, is then expanding Machine 222a expansion work, provides power for compressor 122a, not only reduces the cooling load of interior circulation cooling system 110, subtracts Lack the consumption of cooling water, decreased equipment size and investment, and also reduced the power consumption of compressor 122a, save operation Cost.The zero-emission type circulating water cooling system 200 being provided using embodiment, can greatly reduce cooling water water consumption, and can Reach wastewater zero discharge, prevent from polluting, make water-deficient area and the high area of environmental requirement also can meet plant condition.
Embodiment 3
Refer to Fig. 4, the present embodiment provides a kind of zero-emission type circulating water cooling system 300, zero-emission type recirculated water cooling But system 300 and the different part of zero-emission type circulating water cooling system 100 are:Zero-emission type circulating water cooling system 300 external circulation cooling system 320 also includes extender cycling element 322, and the working media of extender cycling element 322 is swollen Swollen dose.
Further, extender cycling element 322 is included decompressor 322a, booster pump 322b and is situated between with heat for extender Matter carries out the vaporizer 322c of heat exchange.The outlet of decompressor 322a and the inlet communication of refrigerant cooler 123, vaporizer The extender import of 322c is connected by booster pump 322b with the outlet of refrigerant cooler 123, and the extender of vaporizer 322c goes out Mouthful with the inlet communication of decompressor 322a;The power output portion of decompressor 322a is connected with the compression power input unit of compressor 122a Connect.
It should be noted that extender and cold-producing medium be same medium and can be ammonia, nitrogen, methane, ethane, ethylene, Any one in propane, propylene, butane, pentane and freon.In the present embodiment, medium is ammonia.
The cyclic process that medium is exported as starting point with refrigerant cooler 123 is:Outlet by refrigerant cooler 123 The medium of the liquid phase flowing out is split into two strands, and one medium enters vaporizer 322c after entering booster pump 322b supercharging and absorbs heat The heat of medium or industrial waste heat become high pressure vapor, and this strand of medium subsequently enters decompressor 322a expansion work, media expansion Work is sent to the compression power input unit of compressor 122a by the power output portion of decompressor 322a, and this strand of medium is expanding It is changed into low-pressure vapor phase after acting, return to refrigerant cooler 123 and again cool down and be condensed into liquid phase;Another strand of medium is through decompression After device 124 decompression, enter the second cooler 113, absorb the heat of cooling water in the second cooler 113, gasify as low-pressure vapor phase Medium, after the medium that the refrigerant outlet of the second cooler 113 flows out enters and is pressurized compressor 122a, enter cold-producing medium Again it is condensed into liquid phase in cooler 123
In the present embodiment, extender and cold-producing medium are same medium, in the base of zero-emission type circulating water cooling system 200 On plinth, zero-emission type circulating water cooling system 300 enormously simplify external circulation cooling system 320 it is not necessary to circulate extender Unit 322 is separately provided, and reduces equipment investment cost and amasss with outfit of equipment, and decreases chemical substance group in system simultaneously Dosis refracta is so that system operation is more stable, safety.Additionally, the medium of outlet outflow of compressor 122a and decompressor 322a The medium temperature that flows out of outlet all relatively low but the two temperature is not necessarily identical, enter back into refrigerant cooler after the two mixing 123 are disposably cooled down, and can avoid arranging two refrigerant cooler 123, and refrigerant cooler 123 only need to be to mixing Ammonia afterwards carries out a cooling treatment, and cooling range is relatively fixing, and the equipment of not only simplify reduces operating cost, and makes The refrigeration temperature difference of refrigerant cooler 123 is substantially constant, reduces power consumption.
Further, in the present embodiment, it is provided between vaporizer 322c and the first cooler 112 and pass through for thermal medium Arm 324, arm 324 connects the thermal medium inlet of thermal medium outlet and first cooler 112 of vaporizer 322c.
In actual applications, as needed, can select to make all or part of thermal medium pass sequentially through vaporizer 322c, prop up Pipe 324 and the first cooler 112, are cooled down respectively in vaporizer 322c with the first cooler 112 twice, improve to whole Or the cooling effect of part thermal medium.When not needing to be cooled down twice, thermal medium can only be entered by the first cooler 112 Row cooling, and now vaporizer 322c can be used for absorbing industrial waste heat, prevents used heat from polluting.
The operation principle of zero-emission type circulating water cooling system 300 is:By extender and cold-producing medium are used same Jie Matter replaces, and makes compression process and expansion process be in same circulation, compared with zero-emission type circulating water cooling system 200, Enormously simplify device structure, reduce equipment investment cost, and because medium only need to be carried out once in refrigerant cooler 123 Property cool, simplify the cooling procedure of medium, decrease power consumption, energy saving, and cooling water is due to repeatable circulation Use, wastewater zero discharge can be reached, prevent the pollution of the environment.
Embodiment 4
Refer to Fig. 5, the present embodiment provides a kind of zero-emission type circulating water cooling system 400.Zero-emission type recirculated water cooling But system 400 is compared with zero-emission type circulating water cooling system 100, except for the difference that:Zero-emission type circulating water cooling system 400 The refrigerant cycle apparatus 422 of external circulation cooling system 420 include absorber 422a, solution pump 422b and for entering with thermal medium The generator 422c of row heat exchange, the cold-producing medium of external circulation cooling system 420 is absorbing liquid and combining of circulating agent.
Specifically, the circulation agent inlet communication of the refrigerant outlet of the second cooler 113 and absorber 422a, absorber The outlet of 422a is connected by solution pump 422b with the import of generator 422c, and the circulation agent outlet of generator 422c is cold with cold-producing medium But the refrigerant inlet connection of device 123, the absorbing liquid outlet of generator 422c and the absorbing liquid inlet communication of absorber 422a.
Further, absorbing liquid is water and circulates agent for ammonia;Or absorbing liquid is lithium bromide and circulates agent for water.
Circulation agent enters absorber 422a after the second cooler 113 endothermic gasification, goes out from the absorbing liquid of generator 422c The absorbing liquid import through absorber 422a for the absorbing liquid (lean solution) that mouth flows out enters absorber 422a and gaseous circulation agent is carried out Absorb, the absorbing liquid absorbing circulation agent becomes rich solution, after solution pump 422b supercharging, enter generator 422c.
After rich solution carries out heat exchange with thermal medium in generator 422c, can be by circulation agent therein again with gaseous shape Formula discharges, and gaseous recycle agent enters refrigerant cooler 123 condensation liquefaction, liquefaction by the circulation agent outlet of generator 422c Circulation agent afterwards enters the second cooler 113 and again provides cold for thermal medium after being reduced pressure by decompressor 124.Meanwhile, exist The absorbing liquid releasing circulation agent in generator 422c enters absorber 422a absorption gaseous recycle agent again, so completes to follow Ring.
Further, in the present embodiment, with zero-emission type circulating water cooling system 100, zero-emission type circulating water Unlike system 200 and zero-emission type circulating water cooling system 300, zero-emission type circulating water cooling system 400 need not be pressed Contracting machine 122a, decompressor 222a etc., reduce power consumption, also improve stability simultaneously, further simplified device structure, subtract Little equipment volume and equipment investment cost.Meanwhile, zero-emission type circulating water cooling system 400 equally can be with Selection utilization Two coolers 113 and generator 422c carry out dual-cooled to thermal medium, improve cooling effect.
The operation principle of zero-emission type circulating water cooling system 400 is:By absorbing liquid to the absorption circulating agent and release Realize the cooling of thermal medium and external circulation cooling system 420 are recycled to cold-producing medium, reduce power consumption simplifying and set It is achieved that zero-emission while standby.Additionally, cooling effect and cooling stability are also guaranteed and improve.And cooling water Recycled due to repeatable, wastewater zero discharge can be reached, prevent the pollution of the environment.
In sum, the zero-emission type circulating water cooling system 100 of present invention offer, zero-emission type circulating water cooling system 200th, zero-emission type circulating water cooling system 300 and zero-emission type circulating water cooling system 400 are respectively provided with good cooling results, electricity Consume low, the low advantage of operating cost, and due to zero-emission type circulating water cooling system 100, zero-emission type circulating water system System 200, zero-emission type circulating water cooling system 300 and zero-emission type circulating water cooling system 400 are enclosed circulation Cooling system, can also greatly reduce cooling water or the consumption of other cold-producing mediums and cooling water, not only cost-effective and also can Substantially to realize zero-emission, environmental friendliness.Further, since each zero system generally circulating cooling above, circulating water makes With greatly reducing the consumption of cooling water, saving water resource and operating cost.Cooling water is recycled due to repeatable, permissible Reach zero-emission, prevent the pollution of the environment.Using system above, cooling water water consumption can be greatly reduced, so that water-deficient area also can be expired Sufficient plant condition.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (10)

1. a kind of zero-emission type circulating water cooling system is it is characterised in that in described zero-emission type circulating water cooling system includes Circulating cooling system and the external circulation cooling system for providing cold for described interior circulation cooling system;
The working media of described interior circulation cooling system be cooling water, described interior circulation cooling system include circulating water line and It is installed on the first cooler for cooling down thermal medium, second cooling for cooling down described cooling water of described circulating water line Device and the circulating pump for driving described cooling water to flow in described circulating water line;
The working media of described external circulation cooling system is cold-producing medium, and described external circulation cooling system includes refrigerant circulation line And it is installed on refrigerant cycle apparatus, refrigerant cooler and the decompressor of described refrigerant circulation line.
2. zero-emission type circulating water cooling system according to claim 1 is it is characterised in that according to described cooling water in institute State the flow direction of circulating water line, the upstream of described second cooler is additionally provided with air precooler.
3. zero-emission type circulating water cooling system according to claim 1 is it is characterised in that described refrigerant cycle apparatus Including compressor, the refrigerant outlet of described second cooler and the inlet communication of described compressor, the outlet of described compressor Inlet communication with described refrigerant cooler.
4. zero-emission type circulating water cooling system according to claim 3 is it is characterised in that described cold-producing medium is ammonia, nitrogen Any one in gas, methane, ethane, ethylene, propane, propylene, butane, pentane and freon.
5. zero-emission type circulating water cooling system according to claim 1 is it is characterised in that described refrigerant cycle apparatus Including absorber, solution pump and the generator for carrying out heat exchange with thermal medium, described cold-producing medium is absorbing liquid and circulation agent Combination;
The circulation agent inlet communication of the refrigerant outlet of described second cooler and described absorber, the outlet of described absorber with The import of described generator is connected by described solution pump, the circulation agent outlet of described generator and the entering of described refrigerant cooler Mouth connection, the absorbing liquid outlet of described generator and the absorbing liquid inlet communication of described absorber.
6. zero-emission type circulating water cooling system according to claim 5 is it is characterised in that described absorbing liquid is water and institute Stating circulation agent is ammonia;Or for lithium bromide and described circulation agent is water to described absorbing liquid.
7. zero-emission type circulating water cooling system according to claim 3 is it is characterised in that described external circulation cooling system Also include extender cycling element;The working media of described extender cycling element is extender;Described extender cycling element Including decompressor, extender cooler, booster pump and the vaporizer carrying out heat exchange for extender and thermal medium, described expansion The outlet of machine and the inlet communication of described extender cooler, the outlet of described extender cooler and the expansion of described vaporizer Agent entrance is connected by described booster pump, and the extender of described vaporizer exports the inlet communication with described decompressor;Described expansion The power output portion of machine is connected with the compression power input unit of described compressor.
8. zero-emission type circulating water cooling system according to claim 3 is it is characterised in that described external circulation cooling system Also include extender cycling element;Described extender cycling element includes decompressor, booster pump and is used for extender and thermal medium Carry out the vaporizer of heat exchange;The outlet of described decompressor and the inlet communication of described refrigerant cooler, described vaporizer Extender import is connected by described booster pump with the outlet of described refrigerant cooler, and the extender of described vaporizer exports and institute State expander inlet connection;The power output portion of described decompressor is connected with the compression power input unit of described compressor.
9. the zero-emission type circulating water cooling system according to claim 7 or 8 is it is characterised in that described vaporizer and institute State and between the first cooler, be provided with the arm passing through for thermal medium, described arm connect the thermal medium outlet of described vaporizer with The thermal medium inlet of described first cooler.
10. zero-emission type circulating water cooling system according to claim 1 is it is characterised in that described first cooler is Plate-fin heat exchanger.
CN201611036409.4A 2016-11-21 2016-11-21 Zero discharge type circulating water cooling system Pending CN106403453A (en)

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Application publication date: 20170215