CN103509524A - Lithium bromide solution for lithium bromide absorption refrigerator - Google Patents
Lithium bromide solution for lithium bromide absorption refrigerator Download PDFInfo
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- CN103509524A CN103509524A CN201310454446.7A CN201310454446A CN103509524A CN 103509524 A CN103509524 A CN 103509524A CN 201310454446 A CN201310454446 A CN 201310454446A CN 103509524 A CN103509524 A CN 103509524A
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- lithium
- lithium bromide
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- bromide
- bromide solution
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Abstract
The invention discloses a lithium bromide solution for a lithium bromide absorption refrigerator. The lithium bromide solution comprises the following components by mol: (1) 50-60% of lithium bromide, (2) 0.05-0.1% of lithium hydroxide, (3) 0.01-0.04% of lithium molybdate, (4) 0.01-0.04% of lithium nitrate, and the balance of water. The invention provides the lithium bromide solution special for the lithium bromide absorption refrigerator; a stable oxidation film layer can be formed on the surface of carbon steel to effectively prevent and relieve the corrosion of the lithium bromide solution on parts of the refrigerator, so that difficulties in the industry are solved.
Description
Technical field
The present invention relates to a kind of lithium-bromide solution for lithium-bromide absorption-type refrigerating machine, belong to chemical field.
Background technology
In prior art, in refrigerating industry, lithium-bromide solution is widely used as one of absorption refrigeration agent.In lithium bromide absorbing type refrigeration, water is as refrigeration agent, and lithiumbromide is as absorption agent.Because the boiling point of lithium bromide water solution own is very high, extremely difficult volatilization, so can think that the steam on lithiumbromide saturated solution liquid level is pure water steam; At a certain temperature, the steam-laden pressure component on lithium bromide water solution liquid level is less than pure water saturation pressure component; And concentration is higher, the steam-laden pressure component on liquid level is less.So under identical temperature condition, lithium bromide water solution concentration is larger, its ability that absorbs moisture is just stronger.This namely adopts lithiumbromide as absorption agent conventionally, and water is as the reason of refrigeration agent.
Existing lithium-bromide absorption-type refrigerating machine is mainly comprised of several parts such as producer, condenser, vaporizer, resorber, interchanger, recycle pumps.Its principle of work is as follows: in lithium-bromide absorption-type refrigerating machine operational process, when lithium bromide water solution is subject to after the heating of heat medium water in producer, the water in solution is constantly vaporized; Along with the continuous vaporization of water, the lithium bromide water solution concentration in producer constantly raises, and enters resorber; Water vapour enters condenser, after the cooling water temperature in the device that is condensed, condenses, and becomes the liquid water of high pressure low temperature; When the water in condenser enters vaporizer by throttling valve, rapid expansion and vaporizing, and in vaporescence a large amount of heats that absorb chilled water in vaporizers, thereby reach the object of cooling refrigeration; In this process, water at low temperature steam enters resorber, and the lithium bromide water solution being absorbed in device absorbs, and strength of solution progressively reduces, then sends producer back to by recycle pump, completes whole circulation.So move in endless cycles, produce continuously cold.Because bromize lithium dilute solution is cooled in resorber, temperature is lower, in order to save the heat of heat dilute solution, improve the thermo-efficiency of whole device, in system, increased an interchanger, allow the high temperature strong solution of producer outflow and the low temperature dilute solution that resorber flows out carry out heat exchange, improve the temperature that dilute solution enters producer.
Yet the parts of existing lithium-bromide absorption-type refrigerating machine are all mainly to adopt carbon steel material to make, and lithium-bromide solution is a kind of stronger corrosive medium, and carbon steel material is had to stronger erosion.Therefore, how to prevent and to alleviate the corrosion of lithium-bromide solution to the parts of refrigerator, having become one of difficult problem in industry.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of lithium-bromide solution for lithium-bromide absorption-type refrigerating machine.
To achieve the above object of the invention, the technical solution used in the present invention is: a kind of lithium-bromide solution for lithium-bromide absorption-type refrigerating machine, in mole, comprise following component:
(1) lithiumbromide 50～60%;
(2) lithium hydroxide 0.05～0.1%;
(3) lithium molybdate 0.01～0.04%;
(4) lithium nitrate 0.01～0.04%;
Surplus is water.
In technique scheme, take mole: the consumption of described lithiumbromide is 55%.
In technique scheme, take mole: the consumption of described lithium hydroxide is 0.07%.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1. the present invention has developed a kind of lithium-bromide solution that is specifically designed to lithium-bromide absorption-type refrigerating machine, and it can form stable oxidation film layer at steel surface, effectively prevents and alleviates the corrosion of lithium-bromide solution to the parts of refrigerator, has solved the difficult problem in industry.
2. lithium-bromide solution configuration of the present invention rationally, not only has obvious slow releasing function to carbon steel, and can avoid bringing out pitting, avoids the generation of local corrosion.
3. lithium-bromide solution collocation method of the present invention is simple, is suitable for applying.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment mono-:
For a lithium-bromide solution for lithium-bromide absorption-type refrigerating machine, in mole, comprise following component:
(1) lithiumbromide 55%;
(2) lithium hydroxide 0.07%;
(3) lithium molybdate 0.02%;
(4) lithium nitrate 0.02%;
Surplus is water.
Carry out electro-chemical test, the working area of its sample is 1 square centimeter, and remaining surface is all used polymer silica gel sealing, and chemical immersion sample size is 25mm * 25mm * 1.5mm; Sample through liquid honing to 1000#, washing, degreasing, dry up rear stand-by.Test(ing) medium adopts the lithium-bromide solution of the present embodiment.
Chemical immersion test is to carry out in autoclave, and sample immerses after medium with high pure nitrogen inflation 1 hour, and to etch under fixed temperature 200 hours; Take out after sample, in 3mol/L hydrochloric acid+0.07mol/L hexamethylenetetramine solution of 50 ℃, clean 5 minutes, and evaluate erosion rate in weightless mode.After test, whether surface produces pitting with scanning electron microscopic observation.
Test-results surface: carbon steel has entered passive state in the solution medium of the present embodiment, and widen to 200mV passive potential region, and the electrochemical stability of surperficial carbon steel is good; Meanwhile, do not find to occur pitting pattern.
Claims (3)
1. for a lithium-bromide solution for lithium-bromide absorption-type refrigerating machine, it is characterized in that, in mole, comprise following component:
(1) lithiumbromide 50～60%;
(2) lithium hydroxide 0.05～0.1%;
(3) lithium molybdate 0.01～0.04%;
(4) lithium nitrate 0.01～0.04%;
Surplus is water.
2. the lithium-bromide solution for lithium-bromide absorption-type refrigerating machine according to claim 1, is characterized in that, take mole: the consumption of described lithiumbromide is 55%.
3. the lithium-bromide solution for lithium-bromide absorption-type refrigerating machine according to claim 1, is characterized in that, take mole: the consumption of described lithium hydroxide is 0.07%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310454446.7A CN103509524A (en) | 2013-09-28 | 2013-09-28 | Lithium bromide solution for lithium bromide absorption refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310454446.7A CN103509524A (en) | 2013-09-28 | 2013-09-28 | Lithium bromide solution for lithium bromide absorption refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103509524A true CN103509524A (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310454446.7A Pending CN103509524A (en) | 2013-09-28 | 2013-09-28 | Lithium bromide solution for lithium bromide absorption refrigerator |
Country Status (1)
| Country | Link |
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| CN (1) | CN103509524A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912934A (en) * | 1987-10-05 | 1990-04-03 | Hitachi, Ltd. | Hermetically closed circulation type, vapor absorption refrigerator |
| US5377494A (en) * | 1991-06-24 | 1995-01-03 | Sharp Kabushiki Kaisha | Heat exchanging apparatus and a method of preventing corrosion |
| CN1220382A (en) * | 1997-10-24 | 1999-06-23 | 株式会社荏原制作所 | Absorption chiller-heater and method for forming initial anticorrosive film therefor |
-
2013
- 2013-09-28 CN CN201310454446.7A patent/CN103509524A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912934A (en) * | 1987-10-05 | 1990-04-03 | Hitachi, Ltd. | Hermetically closed circulation type, vapor absorption refrigerator |
| US5377494A (en) * | 1991-06-24 | 1995-01-03 | Sharp Kabushiki Kaisha | Heat exchanging apparatus and a method of preventing corrosion |
| CN1220382A (en) * | 1997-10-24 | 1999-06-23 | 株式会社荏原制作所 | Absorption chiller-heater and method for forming initial anticorrosive film therefor |
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Application publication date: 20140115 |
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| WD01 | Invention patent application deemed withdrawn after publication |