CN101561198A - Cooling method by utilizing lithium bromide unit - Google Patents
Cooling method by utilizing lithium bromide unit Download PDFInfo
- Publication number
- CN101561198A CN101561198A CNA2008100156692A CN200810015669A CN101561198A CN 101561198 A CN101561198 A CN 101561198A CN A2008100156692 A CNA2008100156692 A CN A2008100156692A CN 200810015669 A CN200810015669 A CN 200810015669A CN 101561198 A CN101561198 A CN 101561198A
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- China
- Prior art keywords
- lithium bromide
- cold
- water
- cooling
- copper liquid
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
The invention provides an industrial production cooling method by combining lithium bromide refrigeration with copper washing ammonia cooling and the refrigeration of a freezing ice machine. The method uses coldness-absorbing hot water as a heat source and utilizes a lithium bromide refrigeration unit to prepare cold water to cool copper liquid drained from cold discharge pipes. The copper liquid has the following cooling flow: the copper liquid drained from a regenerator is firstly cooled by an evaporator and cold discharge pipes of an evaporator flash tank and then is cooled by a graphite heat exchanger and ammonia to be recycled; and the matched lithium bromide refrigeration unit uses the graphite heat exchanger as equipment for the indirect heat exchange between the copper liquid and the cold water and utilizes a miniature circulating cooling water system to cool the self lithium bromide refrigeration unit so as to effectively solve the refrigeration problem of industrial production at a high temperature, greatly prolong the service life of an original refrigeration unit, fully utilize the low-grade energy resources, decrease the energy consumption and effectively prevent the frost crack phenomenon of heat-transfer pipes of the evaporator.
Description
Technical field:
The invention belongs to industrial production cooling field, the method for utilizing the lithium bromide unit to lower the temperature specifically.
Background technology:
At present, industrial refrigeration is washed the freezing ice maker of ammonia cold-peace with copper mostly and is lowered the temperature, this mode can satisfy most of industrial needs when temperature is lower, but when temperature is higher, no matter be copper liquid temperature, or the cold temperature of ammonia is severe overweight all, the problem that has the refrigerating capacity deficiency has to keep production by reducing load and emptying, brings to industrial production to have a strong impact on; The lithium bromide unit be with a kind of with hot water, steam, fuel oil, combustion gas and various useless (surplus) thermal source, produce the refrigeration plant of 5 ℃ of cold water, the simple refrigeration of utilizing the lithium bromide device can't satisfy in the industrial production needs to refrigeration again.
Summary of the invention:
Purpose of the present invention just provides a kind of lithium bromide refrigerating and copper and washes that ammonia is cold, the machine-processed cold junction of freezing ice closes, and carries out the method for industrial production cooling.
The object of the present invention is achieved like this: with the suction hot and cold water is thermal source, utilize the lithium bromide refrigerating unit to produce cold water, provide the copper liquid cooling of cold type, copper liquid cooling flow process is: the copper liquid that goes out regenerator is earlier through evaporimeter and the cooling of evaporimeter flash tank cold type, recycle after but through graphite heat exchanger and ammonia are cold again, supporting lithium bromide refrigerating unit with the equipment of graphite heat exchanger as copper liquid and cold water indirect heat exchange, utilizes small-sized recirculating cooling water system to use for lithium bromide unit self cooling.
1. take two pump systems, use no nozzle technology, thoroughly solved the sharply phenomenon of decay of cold, absorber replaces spray to absorb to drench to swash to absorb;
2. evaporimeter adopts to drench and swashs mode, makes full use of heat transfer area, reduces the heat-transfer pipe thickness of liquid film, strengthens heat transfer efficiency;
3. the water as refrigerant from condenser is introduced into the evaporimeter flash tank, sends into evaporation cryogen groove by cryogenic fluid pump again and evaporates.
The invention has the beneficial effects as follows: effectively solved industrial refrigeration problem under the higher situation of temperature, be improved significantly the service life of original refrigeration unit, make full use of low-grade energy, reduced energy consumption, effectively prevented heat-transfer pipe of evaporator bursting by freezing phenomenon.
The specific embodiment
Lithium bromide relies on that water as refrigerant (cold-producing medium) evaporates under the low pressure (about 6.78mmHg) on heat-transfer pipe of evaporator, this process of heat of water is produced cold water in the absorption heat-transfer pipe, after the water as refrigerant evaporation, the evaporimeter internal pressure will raise, after pressure is raised to certain numerical value, evaporate and to stop, lithium-bromide solution absorbs the very capable of steam, make absorbent so adopt lithium-bromide solution, lithium-bromide solution absorbs refrigerant vapour continuously, just can keep the low-pressure (6.78mmHg) in the evaporimeter.The parts of absorbent steam are called absorber.
Concentration was thinning after lithium-bromide solution absorbed refrigerant vapour, and concentration is rare more, and absorbability is weak more; Just can not must weak solution be heated with thermal source absorbing refrigerant vapour after solution reaches capacity for this reason again, refrigerant vapour takes place after weak solution is heated again, concentration thickens.The parts that refrigerant vapour takes place are called generator, the isolated refrigerant vapour water cooling that in condenser, is cooled, be condensed into water as refrigerant, water as refrigerant sprays sweat cooling on the heat-transfer pipe of evaporator again, solution after concentrating is used for absorbing once more refrigerant vapour, low-temperature cold water is just constantly produced in so continuous circulation, evaporimeter continuously.
The inner loop of two sections machines of hot water comprises two independently systems, each independently system all contain following cyclic process: the weak solution in the absorber is sent to generator by solution pump, the heat exchanger of flowing through in the way, the weak solution that enters generator is heated by the heat of hot water in the pipeline, go out refrigerant vapour, be condensed into concentrated solution, concentrated solution is flowed through between heat transfering tube of heat exchanger, flow to the weak solution of generator in the heating tube, temperature enters absorber after reducing, the refrigerant vapour that generator produces enters in the condenser, the water as refrigerant that the water-cooled that is cooled is congealed into is through U type pipe inflow evaporator liquid capsule, be sent to the spray system on evaporimeter top again through cryogenic fluid pump (evaporation pump), evenly spray is in tube surface, the heat of absorption tube inner cold water and evaporating, the refrigerant vapour that produces enters absorber, absorbed by concentrated solution, discharging a large amount of heats after refrigerant vapour is absorbed is taken away by cooling water, concentrated solution becomes weak solution after absorbing water vapour, be sent to generator by solution pump again, this process constantly circulates, and evaporimeter is just constantly produced cold water continuously.
The external circulating system of two sections machines of hot water: include hot water, cold water, three systems of cooling water.Hot water advances from high temperature section, and low-temperature zone goes out (the high and low temperature section is to distinguish by workspace hot water temperature's height), and cold water advances from high temperature section, and low-temperature zone goes out.Cooling water advances high temperature section from low-temperature zone and goes out.The purpose that heat exchanger is set is in order to improve the thermal efficiency of unit.Be sent to the weak solution of generator, temperature raises behind heat exchanger, and this has just reduced institute's calorific requirement in the generator.
As previously mentioned, lithium bromide absorption cold ability of swimming handpiece Water Chilling Units is that air-tightness requires high vacuum equipment.The water condensation that in unit, can not be cooled, or can not be called incoagulable gas by the gas that lithium-bromide solution absorbs, incoagulable gas has great influence to the performance of unit, and in order to extract incoagulable gas out, unit is provided with automatic pump drainage device of air.
Be described further below in conjunction with embodiment
Embodiment 1
The desalted water of urea one absorption cooler cooling is transported to lithium bromide post with hot desalted water by pipeline through water circulating pump, by electric control valve about 90 ℃ hot desalted water intake pressures are controlled at and enter unit below the 0.5Mpa, be sent to urea workshop section by backwater after unit and the lithium bromide heat exchange.
The lithium bromide unit produce 10 ℃ of cold water lead up to pipeline from the graphite heat exchanger shell from top to bottom in cold type outlet from bottom to top 50 ℃ of left and right sides copper liquid carry out heat exchange, copper liquid enters the further cooling of ammonia condenser after the copper pump enters Tong Ta after the heat exchange, and 15 ℃ of cold-water return enter the cold water surge tank through pipeline.Another road cold water 15 ℃ of cold-water return after tubular heat exchanger and synthetic recirculated water carry out heat exchange also enter the cold water surge tank through pipeline; Cold water is lowered the temperature by entering the lithium bromide unit behind the water supply pump pressure-raising after entering surge tank, and cold water is recycling.Surge tank is provided with the general liquid level of overflow pipe and is controlled at about 2/3, can enter in the glass fibre reinforced plastics cooling tower cistern by overflow pipe as liquid level is higher; In case being provided with when the filling pipe liquid level is hanged down, surge tank can improve liquid level by moisturizing.The lithium bromide refrigerating unit is provided with a cover self-cooling system, in the circulating water chennel 31 ℃ of desalted waters by the recirculated cooling water water pump enter in the lithium bromide unit with set heat exchange after 37 ℃ enter that to enter circulating water chennel after glass fibre reinforced plastics cooling tower is cooled to 31 ℃ recycling.
Claims (4)
1, a kind of method of utilizing the lithium bromide unit to lower the temperature, to be characterised in that, with the suction hot and cold water is thermal source, utilize the lithium bromide refrigerating unit to produce cold water, provide the copper liquid cooling of cold type, copper liquid cooling flow process is: the copper liquid that goes out regenerator is earlier through evaporimeter and the cooling of evaporimeter flash tank cold type, recycle after but through graphite heat exchanger and ammonia are cold again, supporting lithium bromide refrigerating unit, with the equipment of graphite heat exchanger, utilize small-sized recirculating cooling water system to use for lithium bromide unit self cooling as copper liquid and cold water indirect heat exchange.
2, method according to claim 1 is characterized in that, takes two pump systems, uses no nozzle technology, has thoroughly solved the sharply phenomenon of decay of cold, and absorber replaces spray to absorb to drench to swash to absorb.
3, method according to claim 1 is characterized in that, is introduced into the evaporimeter flash tank from the water as refrigerant of condenser, sends into evaporation cryogen groove by cryogenic fluid pump again and evaporates.
4, evaporimeter according to claim 1 is characterized in that, evaporimeter adopts to drench and swashs mode, makes full use of heat transfer area, reduces the heat-transfer pipe thickness of liquid film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100156692A CN101561198A (en) | 2008-04-14 | 2008-04-14 | Cooling method by utilizing lithium bromide unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100156692A CN101561198A (en) | 2008-04-14 | 2008-04-14 | Cooling method by utilizing lithium bromide unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101561198A true CN101561198A (en) | 2009-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100156692A Pending CN101561198A (en) | 2008-04-14 | 2008-04-14 | Cooling method by utilizing lithium bromide unit |
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| CN (1) | CN101561198A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963470A (en) * | 2010-10-27 | 2011-02-02 | 河南心连心化肥有限公司 | Heat utilization device for urea intermediate-pressure production system |
| CN104974113A (en) * | 2014-04-02 | 2015-10-14 | 中国石油化工股份有限公司 | System and method for cooling ethylene oxide absorption water on EO/EG device |
| CN108825376A (en) * | 2018-07-09 | 2018-11-16 | 中国华电科工集团有限公司 | The building formula distribution internal combustion engine ventilating system and application method of double cooling working medium |
-
2008
- 2008-04-14 CN CNA2008100156692A patent/CN101561198A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963470A (en) * | 2010-10-27 | 2011-02-02 | 河南心连心化肥有限公司 | Heat utilization device for urea intermediate-pressure production system |
| CN101963470B (en) * | 2010-10-27 | 2012-09-26 | 河南心连心化肥有限公司 | Heat utilization device for urea intermediate-pressure production system |
| CN104974113A (en) * | 2014-04-02 | 2015-10-14 | 中国石油化工股份有限公司 | System and method for cooling ethylene oxide absorption water on EO/EG device |
| CN104974113B (en) * | 2014-04-02 | 2017-02-01 | 中国石油化工股份有限公司 | System and method for cooling ethylene oxide absorption water on EO/EG device |
| CN108825376A (en) * | 2018-07-09 | 2018-11-16 | 中国华电科工集团有限公司 | The building formula distribution internal combustion engine ventilating system and application method of double cooling working medium |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20091021 |