CN101629068A - Application of dimethyl ether - Google Patents
Application of dimethyl ether Download PDFInfo
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- CN101629068A CN101629068A CN200910056395A CN200910056395A CN101629068A CN 101629068 A CN101629068 A CN 101629068A CN 200910056395 A CN200910056395 A CN 200910056395A CN 200910056395 A CN200910056395 A CN 200910056395A CN 101629068 A CN101629068 A CN 101629068A
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- dme
- dimethyl ether
- refrigeration agent
- refrigeration
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Abstract
The invention provides an application of dimethyl ether which is used as refrigerant of the refrigeration equipment; the purity of dimethyl ether used as refrigerant is more than 99%. Dimethyl ether used as refrigerant has the advantage of simple storage and use, high refrigerating efficiency, no environmental pollution, cheap price and the like and has wide application prospect.
Description
Technical field
The present invention relates to a kind of, particularly a kind of Application of dimethyl ether.
Background technology
In refrigerant art, mainly be in early days as refrigeration agent with ammonia.After nineteen thirty, various fluorine Lyons is developed out in succession.Because fluorine Lyons is compared with ammonia, has the advantage that toxicity is little, corrodibility is little, progressively replaces ammonia and is widely used as refrigeration agent.But after the seventies, it is found that fluorine Lyons can damage the ozone layer after entering atmosphere, make ozonosphere attenuation even formation cavity, the ultraviolet radiation that earth surface is subjected to strengthens and temperature raises, and the influence mankind's is healthy, destroy the eubiosis, and the growth that jeopardizes some farm crop.Therefore, in recent years, require to stop using the cry in fluorine Lyons more and more higher, world's environmental sanitation tissue requires chloride fluorine Lyons to 2010 year is stopped to produce fully, and fluorine Lyons of hydrogeneous and chlorine is begun control production from the year two thousand twenty.Therefore, searching can replace the refrigeration agent in fluorine Lyons to become the task of top priority.
Dme is a kind of non-toxic substance, can not damage the ozone layer; The normal boiling point of dme is-24.5 ℃, and the normal boiling point that meets refrigeration agent is-60 ℃-0 ℃ requirement; The condensing pressure of dme is 720kPa, the requirement that the condensing pressure when meeting 30 ℃ of refrigeration agents should be between 300-2000kPa; The temperature of solidification of dme is-138.5 ℃, the minimum temperature when working far below refrigerator; The specific heat ratio of dme is 1.003, be lower than R12 1.14 and R22 1.6, so the exhaust temperature of using dme to make the compressor of refrigeration agent is lower than R12 and R22; The evaporating pressure of dme in the time of-20 ℃ be greater than barometric point, can avoid air and the moisture wherein refrigeration system of bleeding during as refrigeration agent.As seen by above, dme has multiple condition and the advantage as refrigeration agent.
Dme not only can extract from coal, coal-seam gas and Sweet natural gas, and the product-methyl alcohol in also can being produced by the connection alcohol of nitrogen fertilizer plant gets through dehydration.Along with the development of science and technology and the modernization of industry, can also be by CO
2The production of contact hydrogenation can also even be extracted from domestic refuse by each kind of plant.
Along with the progress of science and technology, the development of synthesizing methanol technology, making with methyl alcohol is that the technology that base-material is produced dme (DME) from the gas-phase dehydration synthesis method has obtained applying, output has significantly growth.Last century, the whole world was produced only 1,000,000 tons per year, and China's output in 2010 will reach 10,000,000 tons.
In sum, adopt dme to have broad application prospects as refrigeration agent.
Summary of the invention
Purpose of the present invention is in order to solve the problem that present refrigeration agent exists, a kind of Application of dimethyl ether as refrigeration agent to be provided.
The object of the present invention is achieved like this: a kind of Application of dimethyl ether, and as the refrigeration agent of refrigeration equipment.
Described purity＞99% that is used as the dme of refrigeration agent.
Be stored in the pressurized vessel after the described dme liquefaction as refrigeration agent and use, its storage at normal temperature pressure-controlling is at 5-8kg/cm
2Gauge pressure.
The present invention adopts dme replacement fluorine Lyons as refrigeration agent, has following advantage and characteristics:
1, dme is a kind of non-toxic substance, even after leaking in the air, also can not destroy atmospheric ozone layer;
2, the condensing pressure of dme is 720kPa, and the requirement that the condensing pressure when meeting 30 ℃ of refrigeration agents should be between 300-2000kPa is suitable for use as the refrigeration agent of air-conditioning, heat pump, technology water at low temperature, ice making, refrigeration, Industrial processes;
3, the specific heat ratio of dme is 1.003, be lower than R12 1.14 and R22 1.6, so the exhaust temperature of using dme to make the compressor of refrigeration agent is lower than R12 and R22, thereby can adopt bigger compression ratio;
4, the gasification latent heat of dme is 467.4kJ/kg (111.63kcal/kg) (during a boiling point), greater than the gasification latent heat of R12 and R22, obtains certain lifting so use dme to make the Energy Efficiency Ratio that refrigeration agent can make this refrigeration equipment, has played energy-conservation effect;
5, the following of the limits of explosion of dme is limited to 3.5%, in case leak, produces the dangerous minimum of blast;
6, the evaporating pressure of dme in the time of-20 ℃ be greater than barometric point, can avoid air and the moisture wherein refrigeration system of bleeding during as refrigeration agent;
7, the low price of dme can reduce cost greatly as refrigeration agent, is particularly suitable for the refrigeration agent as large-scale refrigeration, ice making and central air-conditioning.
Embodiment
(its storage at normal temperature pressure-controlling is at 5-8kg/cm in the pressurized vessel with being stored in after the liquefaction of the dme of purity＞99%
2Gauge pressure).During use it is charged into and be used as refrigeration agent in the refrigeration equipment.Refrigeration equipment can be large-scale refrigeration equipment, ice plant and central air-conditioning, also can be the refrigeration equipment in air-conditioning commonly used, heat pump, technology water at low temperature, ice making, refrigeration, the Industrial processes.
Claims (3)
1, a kind of Application of dimethyl ether is characterized in that: as the refrigeration agent of refrigeration equipment.
2, Application of dimethyl ether as claimed in claim 1 is characterized in that: described purity＞99% that is used as the dme of refrigeration agent.
3, Application of dimethyl ether as claimed in claim 1 is characterized in that: be stored in the pressurized vessel after the described dme liquefaction as refrigeration agent and use, its storage at normal temperature pressure-controlling is at 5-8kg/cm
2Gauge pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910056395A CN101629068A (en) | 2009-08-13 | 2009-08-13 | Application of dimethyl ether |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910056395A CN101629068A (en) | 2009-08-13 | 2009-08-13 | Application of dimethyl ether |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101629068A true CN101629068A (en) | 2010-01-20 |
Family
ID=41574353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910056395A Pending CN101629068A (en) | 2009-08-13 | 2009-08-13 | Application of dimethyl ether |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101629068A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433179A (en) * | 2011-11-01 | 2012-05-02 | 象山永锋新能源有限公司 | Use of product of low-temperature gasification of liquid dimethyl ether |
| CN104559933A (en) * | 2013-10-20 | 2015-04-29 | 阴运和 | Environment-friendly dimethyl ether refrigerant |
-
2009
- 2009-08-13 CN CN200910056395A patent/CN101629068A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433179A (en) * | 2011-11-01 | 2012-05-02 | 象山永锋新能源有限公司 | Use of product of low-temperature gasification of liquid dimethyl ether |
| CN102433179B (en) * | 2011-11-01 | 2014-07-16 | 象山永锋新能源有限公司 | Use of product of low-temperature gasification of liquid dimethyl ether |
| CN104559933A (en) * | 2013-10-20 | 2015-04-29 | 阴运和 | Environment-friendly dimethyl ether refrigerant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100120 |