CN103047791A - Low-temperature flue gas double-effect lithium bromide absorption water chilling unit and double-effect refrigeration method - Google Patents
Low-temperature flue gas double-effect lithium bromide absorption water chilling unit and double-effect refrigeration method Download PDFInfo
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- CN103047791A CN103047791A CN2012105204576A CN201210520457A CN103047791A CN 103047791 A CN103047791 A CN 103047791A CN 2012105204576 A CN2012105204576 A CN 2012105204576A CN 201210520457 A CN201210520457 A CN 201210520457A CN 103047791 A CN103047791 A CN 103047791A
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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
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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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
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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Abstract
Provided are a low-temperature flue gas double effect lithium bromide absorption water chilling unit and a double-effect refrigeration method. The low-temperature flue gas double effect lithium bromide absorption water chilling unit comprises a high temperature generator, a low temperature generator, a condenser, an evaporator, an absorber, a low temperature heat exchanger and a high temperature heat exchanger, wherein the low temperature generator and the high temperature generator are in a parallel connected structure, the high temperature generator is provided with a low temperature flue gas pipe below 300 DEG C, a steam outlet and concentrated solution outlet of the high temperature generator are subjected to heat exchange by the low temperature generator and then are connected into the condenser, the output ports of the low temperature generator and the high temperature generator are respectively connected to the evaporator and the absorber, cooling water pipes and air conditioning pipes are arranged in the evaporator and the absorber, and the low temperature heat exchanger and the high temperature heat exchanger are connected in series between the low temperature generator and the high temperature generator. The low-temperature flue gas double effect lithium bromide absorption water chilling unit and the double-effect refrigeration method can effectively solve the problem that flue gas double effect lithium bromide absorption water chilling unit can only use the high temperature flue gas at the temperature above 300 DEG C for refrigeration and the low temperature flue gas at the temperature below 300 DEG C can only be used by the low efficiency single-effect flue gas unit, thereby the flue gas utilization efficiency is improved.
Description
Technical field
The present invention relates to a kind of lithium bromide adsorption water chilling unit, be particularly related to a kind of low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units and dual-effect refrigeration method, opened up the lithium-bromide absorption-type refrigerating machine group right＜300 ℃ of flue gases carry out the field that dual-effect refrigeration is used, and the Energy Efficiency Ratio of flue gas refrigeration is promoted 1 times.
Background technology
Existing flue gas type lithium bromide adsorption water chilling unit utilizes the flue gas refrigeration, when utilizing＜300 ℃ of low-temperature flue gas, because temperature is too low, utilize scope too narrow, can only be applied to single-effect type flue gas lithium bromide adsorption water chilling unit, COP is about 0.7 for the unit refrigeration, and utilization ratio is low.
Summary of the invention
Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art problem exists, and provide a kind of low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units and dual-effect refrigeration method, can only adopt when solving flue gas type double-effect lithium bromide absorption type handpiece Water Chilling Units refrigeration high-temperature flue gas more than 300 ℃,＜300 ℃ of low-temperature flue gas can only be used for the problem of inefficient single-action flue gas type unit, promote flue gas utilization efficient.
The technical solution used in the present invention is:
A kind of dual-effect refrigeration method of low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units, adopt parallel-connection structure economic benefits and social benefits unit, cryogenerator and high-temperature generator parallel running, high-temperature generator adopts the heavy in section long-pending, large tracts of land, the low liquid column height, dwindle flue gas and the high-temperature generator concentrated solution temperature difference, it is concentrated that while low liquid column height is conducive to solution, during with exhaust gas temperature utilization to 145 ℃, the high-temperature generator temperature can reach to 140 ℃, cryogenerator adopts the large tracts of land heat exchanger to dwindle the temperature difference, adopt simultaneously to drip and drench structure, high-temperature generator is not affected by the fluid column static pressure, takes full advantage of high-temperature generator generation steam and realizes that solution is concentrated; Take secondary to absorb aspect evaporimeter and the absorber and evaporation technique, weak solution concentration is being down to minimum, widening concentrated solution and weak solution concentration difference, reducing the solution circulation amount, raising unit operation COP; Dwindle heat transfer temperature difference by reasonable increasing heat exchange area, improve evaporation and assimilation effect, reducing solution fluid column static pressure increases effect occurs, with originally can only single-action occur＜300 ℃ of low-temperature flue gas realize the economic benefits and social benefits utilization.
A kind of low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units, comprise high-temperature generator and cryogenerator, condenser, evaporimeter, absorber, low temperature heat exchanger, high-temperature heat exchanger, cryogenerator and high-temperature generator are parallel-connection structure, have in the high-temperature generator＜300 ℃ of low-temperature flue gas pipes, the steam of high-temperature generator enters condenser with connecting after the concentrated solution efferent duct is connected the cryogenerator heat exchange again, cryogenerator is connected with condenser and is connected respectively evaporimeter and absorber, cooling water pipe and air-conditioning water pipe are housed in evaporimeter and the absorber, also are serially connected with low temperature heat exchanger and high-temperature heat exchanger between cryogenerator and the high-temperature generator.
The present invention adopts low temperature, the Generator Design scheme of low concentration, take rationally to strengthen high-temperature generator, the cryogenerator heat exchange area, reduce heat transfer temperature difference and reduce generator fluid column static pressure, obtain higher strong solution concentration with lower temperature, simultaneously, evaporimeter and absorber take secondary to absorb and evaporation technique, reduce weak solution concentration, with originally can only single-action utilize＜300 ℃ of low-temperature flue gas realize the economic benefits and social benefits utilization, open up＜300 ℃ of low-temperature flue gas and be used for flue gas type double-effect lithium bromide absorption type handpiece Water Chilling Units application as waste heat, the unit COP that freezes is promoted to about 1.4, greatly improves the unit refrigerating efficiency.
Description of drawings
Fig. 1 is structural representation of the present invention.
Among the figure, 1-high-temperature generator, 2-cryogenerator, 3-condenser, 4-evaporimeter, 5-absorber, 6-air conditioner water, 7-cooling water, 8-low temperature heat exchanger, 9-high-temperature heat exchanger, 10-flue gas.
The specific embodiment
Referring to Fig. 1, the dual-effect refrigeration method of a kind of low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units of the present invention, adopt parallel-connection structure economic benefits and social benefits unit, cryogenerator and high-temperature generator parallel running, high-temperature generator adopts that the heavy in section is long-pending, large tracts of land, low liquid column height, dwindle flue gas and the high-temperature generator concentrated solution temperature difference, it is concentrated that while low liquid column height is conducive to solution.During with exhaust gas temperature utilization to 145 ℃, the high-temperature generator temperature can reach to 140 ℃, and cryogenerator adopts the large tracts of land heat exchanger to dwindle the temperature difference, adopts simultaneously to drip to drench structure, high-temperature generator is not affected by the fluid column static pressure, takes full advantage of high-temperature generator generation steam and realizes that solution is concentrated; Take secondary to absorb aspect evaporimeter and the absorber and evaporation technique, weak solution concentration is being down to minimum, widening concentrated solution and weak solution concentration difference, reducing the solution circulation amount, raising unit operation COP; Dwindle heat transfer temperature difference by reasonable increasing heat exchange area, improve evaporation and assimilation effect, reducing solution fluid column static pressure increases effect occurs, with originally can only single-action occur＜300 ℃ of low-temperature flue gas realize the economic benefits and social benefits utilization.
Low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units of the present invention, comprise high-temperature generator and cryogenerator, condenser, evaporimeter, absorber, low temperature heat exchanger, high-temperature heat exchanger, cryogenerator and high-temperature generator are parallel-connection structure, have in the high-temperature generator＜300 ℃ of low-temperature flue gas pipes, the steam of high-temperature generator enters condenser with connecting after the concentrated solution efferent duct is connected the cryogenerator heat exchange again, cryogenerator is connected with condenser and is connected respectively evaporimeter and absorber, cooling water pipe and air-conditioning water pipe are housed in evaporimeter and the absorber, also are serially connected with low temperature heat exchanger and high-temperature heat exchanger between cryogenerator and the high-temperature generator.
＜300 ℃ of low-temperature flue gas are sent out and are entered high-temperature generator 1, high-temperature generator 1 through designs such as increase heat exchange area, reduction fluid column static pressure, enlarging section amass utilizes low-temperature flue gas that the high-temperature generator temperature is heated to about 140 ℃, only 145 ℃ of exhaust gas temperatures, flue gas is at high-temperature generator 1 interior heating concentrated solution and produce 85 ℃ of steam and concentrated solution.Realize the little temperature difference, efficiently utilize low-temperature flue gas.85 ℃ of steam that high-temperature generator produces enter cryogenerator 2, through increasing the cryogenerator 2 of the designs such as heat exchange area, reduction fluid column static pressure, 85 ℃ of Steam Heating concentrated solutions that utilize high-temperature generator 1 to produce, producing 39 ℃ of steam enters condenser 3 and is condensed into water as refrigerant, be condensed into concentrated solution after cryogenerator 2 solution are heated simultaneously, the realization economic benefits and social benefits are utilized low-temperature flue gas.Water as refrigerant and concentrated solution enter evaporimeter 4 and absorber 5 is realized refrigeration, and evaporimeter 4 and absorber 5 adopt 2 grades of absorptions and evaporation technique that weak solution concentration is down to 53% simultaneously, more is conducive to unit and utilizes low-temperature flue gas to realize dual-effect refrigeration.
Claims (2)
1. the dual-effect refrigeration method of a low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units, it is characterized in that: adopt parallel-connection structure economic benefits and social benefits unit, cryogenerator and high-temperature generator parallel running, high-temperature generator adopts the heavy in section long-pending, large tracts of land, the low liquid column height, dwindle flue gas and the high-temperature generator concentrated solution temperature difference, it is concentrated that while low liquid column height is conducive to solution, during with exhaust gas temperature utilization to 145 ℃, the high-temperature generator temperature can reach to 140 ℃, cryogenerator adopts the large tracts of land heat exchanger to dwindle the temperature difference, adopt simultaneously to drip and drench structure, high-temperature generator is not affected by the fluid column static pressure, takes full advantage of high-temperature generator generation steam and realizes that solution is concentrated; Take secondary to absorb aspect evaporimeter and the absorber and evaporation technique, weak solution concentration is being down to minimum, widening concentrated solution and weak solution concentration difference, reducing the solution circulation amount, raising unit operation COP; Dwindle heat transfer temperature difference by reasonable increasing heat exchange area, improve evaporation and assimilation effect, reducing solution fluid column static pressure increases effect occurs, with originally can only single-action occur＜300 ℃ of low-temperature flue gas realize the economic benefits and social benefits utilization.
2. low-temperature flue gas double-effect lithium bromide absorption type handpiece Water Chilling Units, comprise high-temperature generator and cryogenerator, condenser, evaporimeter, absorber, low temperature heat exchanger, high-temperature heat exchanger, it is characterized in that: cryogenerator and high-temperature generator are parallel-connection structure, have in the high-temperature generator＜300 ℃ of low-temperature flue gas pipes, the steam of high-temperature generator enters condenser with connecting after the concentrated solution efferent duct is connected the cryogenerator heat exchange again, cryogenerator is connected with condenser and is connected respectively evaporimeter and absorber, cooling water pipe and air-conditioning water pipe are housed in evaporimeter and the absorber, also are serially connected with low temperature heat exchanger and high-temperature heat exchanger between cryogenerator and the high-temperature generator.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879949A (en) * | 2015-05-25 | 2015-09-02 | 湖南同为节能科技有限公司 | Afterburning absorption type integrated unit for air conditioner large temperature difference heat supplying |
| CN108507219A (en) * | 2017-02-28 | 2018-09-07 | 远大空调有限公司 | A kind of compound two-stage type lithium bromide absorption type heat pump and working method |
| CN113623895A (en) * | 2021-07-01 | 2021-11-09 | 华电电力科学研究院有限公司 | Combined cooling heating and power system for cooling data center and control method thereof |
| CN113669956A (en) * | 2021-08-02 | 2021-11-19 | 北京工业大学 | Adjustable generator and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879949A (en) * | 2015-05-25 | 2015-09-02 | 湖南同为节能科技有限公司 | Afterburning absorption type integrated unit for air conditioner large temperature difference heat supplying |
| CN108507219A (en) * | 2017-02-28 | 2018-09-07 | 远大空调有限公司 | A kind of compound two-stage type lithium bromide absorption type heat pump and working method |
| CN113623895A (en) * | 2021-07-01 | 2021-11-09 | 华电电力科学研究院有限公司 | Combined cooling heating and power system for cooling data center and control method thereof |
| CN113669956A (en) * | 2021-08-02 | 2021-11-19 | 北京工业大学 | Adjustable generator and control method thereof |
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