CN106225298A - A kind of dual effect type lithium bromide fridge for air separation unit - Google Patents
A kind of dual effect type lithium bromide fridge for air separation unit Download PDFInfo
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- CN106225298A CN106225298A CN201610689683.5A CN201610689683A CN106225298A CN 106225298 A CN106225298 A CN 106225298A CN 201610689683 A CN201610689683 A CN 201610689683A CN 106225298 A CN106225298 A CN 106225298A
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- Prior art keywords
- heat exchanger
- low pressure
- absorber
- pipe
- lithium bromide
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2315/00—Sorption refrigeration cycles or details thereof
- F25B2315/001—Crystallization prevention
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A kind of dual effect type lithium bromide fridge for air separation unit, it is mainly made up of high tension generator, low pressure generator, condenser, vaporizer, absorber, solution pump, solvent pump, vacuum pump, low temperature heat exchanger, solidifying water-to-water heat exchanger, high-temperature heat exchanger, described high tension generator is provided with steam-out (SO) source for heating the driving heat source heat exchanger tube of lithium bromide intermediate solution, this driving heat source heat exchanger tube, after the solidifying water-to-water heat exchanger being positioned in low temperature heat exchanger and high-temperature heat exchanger, picks out with solidifying water pipe；The top of described high tension generator is connected to low pressure generator by a steam pipe, and accesses condenser after coiling bottom low pressure generator；The bottom of described high tension generator connects high-temperature heat exchanger by the adapter of lithium bromide intermediate solution, and exports by adapter connection low pressure generator in the lithium bromide intermediate solution of high-temperature heat exchanger, and contacts with the steam pipe bottom low pressure generator；The top of described low pressure generator or sidewall are communicated in described condenser.
Description
Technical field
The present invention relates to a kind of dual effect type lithium bromide fridge for air separation unit, mainly for air cooling tower system
In air cooling tower epimere provide chilled water, belong to space division refrigeration technology field.
Background technology
Electricity fridge is the dynamic equipment of conventional space division configuration, and it is the compressed air for cooling down air cooling tower epimere, along with
The continuous expansion of space division scale, the power consumption of electricity fridge is the most increasing, and especially in summer, along with the rising of temperature, electricity is cold
Freezing constantly operating in confidential 24 hours, its power consumption aggregate-value is very big, the electric fridge of such as 20,000 space division configuration 600,000 kilocalories, and one
The power consumption (according to the Time Calculation of start 80%) in year is 960,000 degree of electricity, the electric fridge of 40,000 space division configuration 1,200,000 kilocalories, 1 year
Power consumption (according to start 80% Time Calculation) be 1,920,000 degree electricity, 60,000 space division configure 1,500,000 kilocalories electric fridge, 1 year
Power consumption (according to the Time Calculation of start 80%) be 2,400,000 degree electric, with the electricity charge 0.6 yuan/degree, then 20,000,40,000,60,000 space division one
The power consumption price of year electricity fridge is 57.6 ten thousand yuan, 115.2 ten thousand yuan, 1,440,000 yuan respectively, and the fault rate of electricity fridge is high,
Need to configure electrical switchgear etc..
Summary of the invention
It is an object of the invention to the deficiency overcoming prior art to exist, and it is freezing to provide one to be mainly used for substituting electricity
Machine, reliability is high, the dual effect type lithium bromide fridge for air separation unit of good energy saving property.
It is an object of the invention to complete by following technical solution, a kind of dual effect type lithium bromide for air separation unit
Fridge, it is mainly by high tension generator, low pressure generator, condenser, vaporizer, absorber, solution pump, solvent pump, vacuum
Pump, low temperature heat exchanger, solidifying water-to-water heat exchanger, high-temperature heat exchanger composition, be provided with steam-out (SO) in described high tension generator
Source is for heating the driving heat source heat exchanger tube of lithium bromide intermediate solution, and this driving heat source heat exchanger tube is through being positioned at low temperature heat exchanger
After the solidifying water-to-water heat exchanger in high-temperature heat exchanger, pick out with solidifying water pipe；A steam is passed through at the top of described high tension generator
Pipe is connected to low pressure generator, and accesses condenser after coiling bottom low pressure generator；The bottom of described high tension generator leads to
Cross lithium bromide intermediate solution adapter connect high-temperature heat exchanger, and high-temperature heat exchanger lithium bromide intermediate solution export pass through
Adapter connection low pressure generator, and contact with the steam pipe bottom low pressure generator；The top of described low pressure generator or sidewall
It is communicated in described condenser；External cooling water inlet pipe and the condenser coil of cooling water outlet tube it is provided with in described condenser；
Condenser picks out pipe by condensed water and is connected to vaporizer liquid-collecting groove, and the most right in being connected to vaporizer after cryogenic fluid pump
Cold water heat exchanger tube carries out the shower sprayed, and the two ends of described cold water heat exchanger tube connect external air cooling tower epimere cooling respectively
Water pipe；
Described vaporizer is connected with the absorber that can will enter after condensate evaporation, is disposed with external cooling water in absorber
The absorber coil pipe of inlet pipe and cooling water outlet tube, absorber is provided above with connecting cryogenic heat exchanger dense lithium-bromide solution exit
Dense lithium-bromide solution shower, and the lithium bromide intermediate solution after absorber bottom is formed with dilution, in absorber bottom
By solution pump and enter high pressure after being sequentially communicated low temperature heat exchanger, solidifying water heat exchanger, high-temperature heat exchanger re-heat and occur
Device, completes a kind of refrigeration cycle.
As preferably: described vaporizer is placed in the centre of absorber；Described low pressure generator cloth adjacent with condenser
Putting, centre is connected by a liquid barrier, and the bottom of described condenser is connected to evaporation after being picked out pipe by condensed water and throttled
Device liquid-collecting groove；Described steam-out (SO) source is mainly the waste hot steam of factory, in the motorized adjustment combination valve structure through providing for oneself
It is connected to driving heat source heat exchanger tube；
Described absorber top is also connected to an automatic gas extraction device, and this automatic gas extraction device utilizes in normal operation
A branch in solution pump enters automatic gas extraction device through constrictor and carries out siphon, and the gas after siphon enters automatic aerofluxus
In device, pressure measxurement controlling vacuum pump and discharge, the bottom in automatic exhaust device connects absorber bottom by connecting tube,
And by solution inflow absorber.
As preferably: described absorber sidewall is in communication with the most molten crystalline substance pipe put, the bottom of this most molten brilliant pipe
Picking out on pipe by what an adapter was communicated in solution pump, the upper end of the most molten described brilliant pipe is plugged with one until bottom
Overflow pipe, the end of this overflow pipe is stretched into until inside low pressure generator from the bottom of low pressure generator.
The present invention is mainly used for substituting electricity fridge, has rational in infrastructure, and easy to use, reliability is high, good energy saving property
Etc. feature.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of dual effect type lithium bromide fridge of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention should be used as specific embodiment introduction: shown in Fig. 1, of the present invention one
Planting the dual effect type lithium bromide fridge for air separation unit, it is mainly by high tension generator 1, low pressure generator 2, condenser 3, steaming
Send out device 4, absorber 5, solution pump 6, cryogenic fluid pump 7, vacuum pump 8, low temperature heat exchanger 9, solidifying water-to-water heat exchanger 10, high-temperature heat exchanger
11 compositions, are provided with steam-out (SO) source 12 for heating the driving heat source of lithium bromide intermediate solution in described high tension generator 1
Heat exchanger tube 13, this driving heat source heat exchanger tube 13 is through the solidifying water heat exchange being positioned in low temperature heat exchanger 9 and high-temperature heat exchanger 11
After device 10, pick out with solidifying water pipe 14；The top of described high tension generator 1 is connected to low pressure generator 2 by a steam pipe 15,
And access condenser 3 after bottom coiling low pressure generator 2；Lithium bromide intermediate solution is passed through in the bottom of described high tension generator 1
Adapter 16 connect high-temperature heat exchanger 11, and high-temperature heat exchanger 11 lithium bromide intermediate solution export by adapter 17 connection
Low pressure generator 2, and contact with the steam pipe 15 bottom low pressure generator 2；The top of described low pressure generator 2 or sidewall connection
In described condenser 3；External cooling water inlet pipe 18 and the condenser coil of cooling water outlet tube 19 it is provided with in described condenser 3
20；Condenser 3 bottom picks out pipe 21 by condensed water and is connected to vaporizer liquid-collecting groove 22, and is connected to steam after cryogenic fluid pump 7
The shower 24 just sprayed cold water heat exchanger tube 23 in sending out device 4, outside the two ends of described cold water heat exchanger tube 23 connect respectively
Cold water inlet pipe and the cold water of putting air cooling tower epimere cooling water pipe go out pipe 25；
Described vaporizer 4 is connected with the absorber 5 that can will enter after condensate evaporation, is disposed with external cold in absorber 5
But the absorber coil pipe 26 of water inlet pipe 18 and cooling water outlet tube 19, absorber 5 is provided above with connecting the dense bromine of low temperature heat exchanger 9
Change the dense lithium-bromide solution shower 27 of lithium solution exit, and in the middle of the lithium bromide after absorber 5 bottom is formed with dilution
Solution 28, passes through solution pump 6 and is sequentially communicated low temperature heat exchanger 9, solidifying water heat exchanger 10, high-temperature hot in absorber 5 bottom
Enter high tension generator 1 after exchanger 11 re-heat, complete a kind of refrigeration cycle.
Shown in figure, described vaporizer 4 is placed in the centre of absorber 5；Described low pressure generator 2 and condenser 3 phase
Adjacent layout, the middle liquid barrier 29 that passes through is connected, and the bottom of described condenser 3 connects after being picked out pipe 21 by condensed water and throttled
It is connected to vaporizer liquid-collecting groove 22；The waste hot steam of described steam-out (SO) source 12 predominantly factory, at the electric adjustable through providing for oneself
Joint combination valve structure 30 is connected to driving heat source heat exchanger tube 13；
Described absorber 5 top is also connected to an automatic gas extraction device 31, and this automatic gas extraction device 31 runs normal
The middle branch utilized in solution pump 6 enters automatic gas extraction device 31 through constrictor and carries out siphon, and the gas after siphon enters
Entering in automatic exhaust device 31, pressure measxurement control vacuum pump 8 and discharge, connecting tube is passed through in the bottom in automatic exhaust device 31
32 connect absorber 5 bottom, and by solution inflow absorber 5.
Absorber 5 sidewall of the present invention is in communication with while that puts melts brilliant pipe 33 automatically, and this melts brilliant pipe 33 times automatically
Portion picks out on pipe by what adapter 34 was communicated in solution pump 6, and the upper end of the most molten described brilliant pipe 33 is plugged with one directly
To the overflow pipe 34 of bottom, the end of this overflow pipe 34 is stretched into from the bottom of low pressure generator 2 until low pressure generator 2 is internal.
The operation principle of lithium bromide fridge of the present invention be utilize " lithium bromide-water " binary solution be working medium pair, with
Lithium-bromide solution is absorbent, with water as refrigerant solution, utilizes water evaporation endothermic in fine vacuum to reach purpose of freezing, completes system
SAPMAC method.As it is shown in figure 1, the present invention is mainly by high tension generator 1, low pressure generator 2, condenser 3, vaporizer 4, absorber
5, solution pump 6, solvent pump 7, vacuum pump 8, low temperature heat exchanger 9, the solidifying composition such as water-to-water heat exchanger 10, high-temperature heat exchanger 11.Its
Work process is: the middle lithium-bromide solution in high tension generator 1, is heated by driving heat source steam, and water therein is evaporated
Entering low pressure generator 2, the lithium bromide intermediate solution of high pressure enters low pressure generator 2 after high-temperature heat exchanger 11 cools down,
Being heated further by the steam being evaporated from high tension generator 1 in low pressure generator 2, water therein evaporates formation further
Lithium bromide concentrated solution, the water being evaporated enters condenser 3 through liquid barrier, and cooled water-cooled is coagulated, simultaneously in low pressure generator 2
Steam after heating lithium-bromide solution, be also condensed into water as refrigerant enter condenser 3, two strands of water as refrigerants enter through throttling
Vaporizer liquid-collecting groove 22 is stamped by cryogenic fluid pump 7 and is uniformly sprayed on cold water heat exchanger tube, flashes to the steam of low pressure, by from low
Absorbing after the dense lithium-bromide solution spray of temperature heat exchanger 9 cooling, absorb the cooled water of heat and take away, dense lithium bromide is at absorber 5
In be diluted after, after solution pump 6 boosts, sequentially pass through low temperature heat exchanger 9, solidifying water heat exchanger 10, high-temperature heat exchanger
After 11 re-heats enter high tension generator 1, high temperature driven steam condense in high tension generator 1 after again at solidifying water-to-water heat exchanger 10
In cool down discharge further, this completes a kind of refrigeration cycle.
Automatic gas extraction device in Fig. 1 utilizes a branch in solution pump to enter through constrictor in normal operation
Automatic gas extraction device carries out siphon, and the gas after siphon enters in automatic exhaust device, pressure measxurement control vacuum pump and discharge,
Solution is from inflow absorber bottom, bottom.The most molten brilliant pipe in Fig. 1 is in order to prevent lithium-bromide solution crystallization setting, bromination
Lithium solution is high in concentration, temperature easily crystallizes the when of low, and the lithium-bromide solution in cryogenic heat exchanger to be concentration the highest,
Temperature is minimum, the most once crystallizes, and the liquid level that will result in low pressure generator raises, and flows into automatically through overflow pipe after rising
After molten crystalline substance pipe, and the weak solution mixing from solution pump, temperature raises, and the lithium bromide mixed solution that temperature raises enters absorber
Bottom, squeezes into again cryogenic heat exchanger through solution pump and heats the lithium bromide concentrated solution come from low pressure generator, the most continuous
Back and forth will melt crystallization, thus ensure the continuous service of whole system.
During implementing, first have to determine the key parameter of dual effect type lithium bromide fridge type selecting: steam condition, cold
But coolant-temperature gage and flow, chilled water requirement, unlike in common lithium bromide central air-conditioning system, fills for space division here
Air cooling tower chilled water in putting, lithium bromide fridge must be open circulation, it is impossible to is closed cycle, thus wants emphasis to consider
Condition of water quality, especially heat exchanging have the sealing factor of considerable influence, including cooling water and chilled water, owing to generally using
Waste hot steam, certain steam quality also to be paid close attention to simultaneously；Also having a bit, the stress problems of chilled water, generally, space division is cold
The outlet pressure freezing water pump is higher, and at about 9.5barg, flow determines according to the scale of space division.
Claims (3)
1., for a dual effect type lithium bromide fridge for air separation unit, it is mainly by high tension generator, low pressure generator, condensation
Device, vaporizer, absorber, solution pump, solvent pump, vacuum pump, low temperature heat exchanger, solidifying water-to-water heat exchanger, high-temperature heat exchanger group
Become, it is characterised in that described high tension generator is provided with steam-out (SO) source for heating the driving heat of lithium bromide intermediate solution
Source heat exchanger tube, this driving heat source heat exchanger tube after the solidifying water-to-water heat exchanger being positioned in low temperature heat exchanger and high-temperature heat exchanger,
Pick out with solidifying water pipe；The top of described high tension generator is connected to low pressure generator by a steam pipe, and in coiling low pressure
Condenser is accessed after bottom generator；The bottom of described high tension generator connects high-temperature hot by the adapter of lithium bromide intermediate solution and hands over
Parallel operation, and high-temperature heat exchanger lithium bromide intermediate solution export by adapter connection low pressure generator, and with low pressure occur
Steam pipe contact bottom device；The top of described low pressure generator or sidewall are communicated in described condenser；In described condenser
It is provided with external cooling water inlet pipe and the condenser coil of cooling water outlet tube；Condenser picks out pipe by condensed water and is connected to
Vaporizer liquid-collecting groove, and the shower just cold water heat exchanger tube sprayed in being connected to vaporizer after cryogenic fluid pump, described
The two ends of cold water heat exchanger tube connect external air cooling tower epimere cooling water pipe respectively；
Described vaporizer is connected with the absorber that can will enter after condensate evaporation, is disposed with external cooling water in absorber
The absorber coil pipe of inlet pipe and cooling water outlet tube, absorber is provided above with connecting cryogenic heat exchanger dense lithium-bromide solution exit
Dense lithium-bromide solution shower, and the lithium bromide intermediate solution after absorber bottom is formed with dilution, in absorber bottom
By solution pump and enter high pressure after being sequentially communicated low temperature heat exchanger, solidifying water heat exchanger, high-temperature heat exchanger re-heat and occur
Device, completes a kind of refrigeration cycle.
Dual effect type lithium bromide fridge for air separation unit the most according to claim 1, it is characterised in that described steaming
Send out device and be placed in the centre of absorber；Described low pressure generator is adjacently positioned with condenser, and centre is connected by a liquid barrier,
The bottom of described condenser is connected to vaporizer liquid-collecting groove after being picked out pipe by condensed water and throttled；Described steam-out (SO) source master
The waste hot steam of factory to be, is connected to driving heat source heat exchanger tube in the motorized adjustment combination valve structure through providing for oneself；
Described absorber top is also connected to an automatic gas extraction device, and this automatic gas extraction device utilizes in normal operation
A branch in solution pump enters automatic gas extraction device through constrictor and carries out siphon, and the gas after siphon enters automatic aerofluxus
In device, pressure measxurement controlling vacuum pump and discharge, the bottom in automatic exhaust device connects absorber bottom by connecting tube,
And by solution inflow absorber.
Dual effect type lithium bromide fridge for air separation unit the most according to claim 1 and 2, it is characterised in that described
Absorber sidewall is in communication with while the most molten crystalline substance put is managed, and the bottom of this most molten brilliant pipe is communicated in solution pump by an adapter
Pick out on pipe, the upper end of described automatically molten brilliant pipe be plugged with one until the overflow pipe of bottom, the end of this overflow pipe from
The bottom of low pressure generator is stretched into until inside low pressure generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689683.5A CN106225298A (en) | 2016-08-19 | 2016-08-19 | A kind of dual effect type lithium bromide fridge for air separation unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689683.5A CN106225298A (en) | 2016-08-19 | 2016-08-19 | A kind of dual effect type lithium bromide fridge for air separation unit |
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| CN106225298A true CN106225298A (en) | 2016-12-14 |
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| CN201610689683.5A Pending CN106225298A (en) | 2016-08-19 | 2016-08-19 | A kind of dual effect type lithium bromide fridge for air separation unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759161A (en) * | 2018-06-27 | 2018-11-06 | 浙江智海化工设备工程有限公司 | A kind of single-effect lithiumbromide refrigerator for air separation unit |
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| CN206019056U (en) * | 2016-08-19 | 2017-03-15 | 浙江智海化工设备工程有限公司 | Dual effect type lithium bromide refrigerator for air separation unit |
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- 2016-08-19 CN CN201610689683.5A patent/CN106225298A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2844794Y (en) * | 2005-11-03 | 2006-12-06 | 江苏双良空调设备股份有限公司 | Double-efficient steaming lithium bromide absorbing water cooler set with hot-water supply |
| JP2009085509A (en) * | 2007-09-28 | 2009-04-23 | Sanyo Electric Co Ltd | Method of preventing crystallization of absorbent of high concentration in low-temperature heat exchanger in absorption type refrigerating machine |
| CN201281489Y (en) * | 2008-09-28 | 2009-07-29 | 江苏双良空调设备股份有限公司 | Thermal water vapor concurrent heating type lithium bromide absorption type water chilling unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759161A (en) * | 2018-06-27 | 2018-11-06 | 浙江智海化工设备工程有限公司 | A kind of single-effect lithiumbromide refrigerator for air separation unit |
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