CN101623798A - Application of dimethyl ether fuel gas - Google Patents
Application of dimethyl ether fuel gas Download PDFInfo
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- CN101623798A CN101623798A CN200910056394A CN200910056394A CN101623798A CN 101623798 A CN101623798 A CN 101623798A CN 200910056394 A CN200910056394 A CN 200910056394A CN 200910056394 A CN200910056394 A CN 200910056394A CN 101623798 A CN101623798 A CN 101623798A
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- dimethyl ether
- fuel gas
- ether fuel
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Abstract
The invention provides an application of dimethyl ether fuel gas, which is used as fuel gas for metal cutting or welding. The dimethyl ether fuel gas is stored in a pressure container for use after being liquefied, and the normal temperature storing pressure thereof is controlled at gage pressure of 5 to 8kg/cm<2>. The dimethyl ether fuel gas replaces acetylene or liquefied petroleum gas to be used as fuel gas for metal cutting or welding, has the advantages of convenient storage and use, high burning temperature, no environment pollution, low price and the like and has wide application prospect.
Description
Technical field
The present invention relates to a kind of combustion gas, particularly a kind of application of dimethyl ether fuel gas.
Background technology
The petroleum resources that earth continental shelf can be adopted are few, only can supply human use's many decades time.This causes ballooning oil prices in recent years, is just affecting the countries in the world expanding economy.Though and coal can be made fuel with coal and can give off a large amount of pernicious gases for hundreds of years of human exploitation, atmosphere is produced serious pollution.Therefore, alternative energy source is just being sought in countries in the world, and from the protection environment, requiring this alternative energy source is the clean fuel that only discharges trace harmful gases.
Dimethyl ether (DME) is a kind of nontoxic oxygenated fuel, and normal temperature and pressure is gaseous state down, just can realize liquefaction (boiling point of liquid dimethyl ether is for-24.5 ℃) under 5 atmospheric pressure.The pressure that needs 8 atmospheric pressure to liquefy than the liquefied petroleum gas of family expenses is lower, so security is better than liquefied petroleum gas.
Dimethyl ether not only can extract from coal, coal bed gas and 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 house refuse by various plants.
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 dimethyl ether (DME) from the gas-phase dehydration synthetic 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.And the price of dimethyl ether also has significantly and to fall after rise, and present market price only is about half of diesel oil.
In the welding and cutting operation of metal, for a long time always with acetylene as combustion gas, realize welding and cutting by in oxygen, the burn high temperature (more than 3000 ℃) that produces of acetylene to metal.But because the condensing temperature of acetylene is-82 ℃, is difficult to liquefaction and uses, can only store use or on-the-spot by gaseous state with solid calcium carbide and water prepared in reaction.The latter is not only loaded down with trivial details, but also produces a large amount of irritative gas contaminated environment, influences the healthy of people.Along with the continuous development and progress of petroleum industry, in recent years, begun to adopt liquefied petroleum gas to substitute acetylene, because storing with liquid state, uses liquefied petroleum gas, be better than acetylene greatly.But because liquefied petroleum gas derives from oil,, make the price of liquefied petroleum gas also skyrocket, the highlyest increased to 7000 yuan/ton along with skyrocketing of the in short supply and price of oil.Therefore use liquefied petroleum gas to use combustion gas as the welding and the cutting of metal, cost is also more and more higher.
Summary of the invention
Purpose of the present invention is in order to alleviate the energy shortage situation of present existence, a kind of application that is used as Metal Cutting or welds the dimethyl ether fuel gas of using combustion gas to be provided.
The object of the present invention is achieved like this: a kind of application of dimethyl ether fuel gas, and as Metal Cutting or welding combustion gas.
Be stored in the pressure vessel after the described dimethyl ether fuel gas liquefaction and use, its storage at normal temperature pressure is controlled at 5-8kg/cm
2Gauge pressure.
Described dimethyl ether fuel gas is when being used for Metal Cutting or welding, and the pressure adjusting range of dimethyl ether fuel gas-oxygen stoichiometric composition mixture is 0.001MPa～0.2MPa gauge pressure.
The present invention adopts dimethyl ether to substitute acetylene or liquefied petroleum gas is used combustion gas as Metal Cutting or welding, has following advantage and characteristics:
1, dimethyl ether is a kind of fuel the cleanest except hydrogen, and the waste gas that its burning back produces all is less than the waste gas that produces behind acetylene and the liquefied petroleum gas combustion.
2, the aerial ignition temperature of acetylene is 2070 ℃, ignition temperature in oxygen can reach more than 3300 ℃, the aerial ignition temperature of liquefied petroleum gas is 2055 ℃, ignition temperature in oxygen is about 3300 ℃, and the aerial ignition temperature of dimethyl ether is 2250 ℃, ignition temperature in oxygen can reach about 3500 ℃, all is higher than acetylene and liquefied petroleum gas.
3, industrial acetylene is because of containing impurity hydrogen phosphide, and has special penetrating odor, and dimethyl ether is a kind of nontoxic oxygenated fuel.
4, dimethyl ether has tangible price advantage with respect to liquefied petroleum gas, and the present market price of dimethyl ether only is about the 40-45% of liquefied petroleum gas.
5, the annual production of dimethyl ether surpasses 1,000 ten thousand tons, and it is measured the low advantage of big valency and will continually strengthen.
6, the boiling point of liquid dimethyl ether is-24.5 ℃, also can gasify smoothly under-10 ℃ temperature, and pressure can reach 0.88kg/cm
2Gauge pressure is so also can normally use at north cold area.
7, because the temperature of flame is relevant with pressure, can regulate the flame burning temperature by regulating pressure, when pressure is the 0.001MPa gauge pressure, when wanting specific pressure to be the 0.1MPa gauge pressure, the flame temperature of dimethyl ether fuel gas-oxygen stoichiometric composition mixture hangs down about 600 ℃.
The specific embodiment
Dimethyl ether fuel gas when use combustion gas, is being to be stored in the pressure vessel after dimethyl ether fuel gas is liquefied to use as Metal Cutting or welding, and its storage at normal temperature pressure is controlled at 5-8kg/cm
2Gauge pressure.Dimethyl ether fuel gas is being used for Metal Cutting or when welding, and the pressure of dimethyl ether fuel gas-oxygen stoichiometric composition mixture is controlled at 0.001MPa～0.2MPa gauge pressure.
Claims (3)
1, a kind of application of dimethyl ether fuel gas is characterized in that: as Metal Cutting or welding combustion gas.
2, the application of dimethyl ether fuel gas as claimed in claim 1 is characterized in that: be stored in the pressure vessel after the described dimethyl ether fuel gas liquefaction and use, its storage at normal temperature pressure is controlled at 5-8kg/cm
2Gauge pressure.
3, the application of dimethyl ether fuel gas as claimed in claim 1 is characterized in that: described dimethyl ether fuel gas is when being used for Metal Cutting or welding, and the pressure adjusting range of dimethyl ether fuel gas-oxygen stoichiometric composition mixture is 0.001MPa～0.2MPa gauge pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910056394A CN101623798A (en) | 2009-08-13 | 2009-08-13 | Application of dimethyl ether fuel gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910056394A CN101623798A (en) | 2009-08-13 | 2009-08-13 | Application of dimethyl ether fuel gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101623798A true CN101623798A (en) | 2010-01-13 |
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ID=41519871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910056394A Pending CN101623798A (en) | 2009-08-13 | 2009-08-13 | Application of dimethyl ether fuel gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101623798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019099239A1 (en) * | 2017-11-17 | 2019-05-23 | Praxair Technology, Inc. | Oxy fuel gas mixtures and methods for use |
-
2009
- 2009-08-13 CN CN200910056394A patent/CN101623798A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019099239A1 (en) * | 2017-11-17 | 2019-05-23 | Praxair Technology, Inc. | Oxy fuel gas mixtures and methods for use |
| CN111356553A (en) * | 2017-11-17 | 2020-06-30 | 普莱克斯技术有限公司 | Oxygen fuel gas mixture and method of use |
| US20220306954A1 (en) * | 2017-11-17 | 2022-09-29 | Clayton ORIVAM DE MORAIS | Oxy fuel gas mixtures and methods for use |
| US11920097B2 (en) | 2017-11-17 | 2024-03-05 | Praxair Technology, Inc. | Oxy fuel gas mixtures and methods for use |
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| 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: 20100113 |