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Industrial fuel gas for metal cutting and welding

A technology for industrial gas and petroleum liquefied gas, applied in the field of ether hydrocarbon gas, can solve problems such as unsatisfactory welding performance, and achieve the effects of saving labor hours, smooth cutting surface, and safe use

Inactive Publication Date: 2005-09-14
郑长同 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although my country has introduced a new type of industrial gas to replace acetylene gas, for example: "SE-6 Environmental Protection and Energy Saving Industrial Gas" with the application number of 99126268.9, it is a kind of propane, propylene, etc. Industrial gas for efficiency enhancement, and LPG for dissolving acetylene, but they are less satisfactory in terms of welding performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 0.05Kg of liquefied petroleum gas into a steel cylinder, and then inject 49.95Kg of dimethyl ether to obtain an industrial gas product containing 99.9% of dimethyl ether and 0.1% of liquefied petroleum gas.

[0036] The dimethyl ether is made of methanol as a raw material, in the presence of a zeolite catalyst, a dehydration reaction is carried out at 200-400°C to produce crude dimethyl ether, which is then separated by rectification to obtain dimethyl ether.

Embodiment 2

[0038] Add 0.05Kg of butane and 0.05Kg of propylene into the steel cylinder in turn, and then inject 40Kg of dimethyl ether to obtain an industrial gas product containing 80% dimethyl ether, 10% butane, and 10% propylene.

[0039] The dimethyl ether is made of crude methanol as raw material. 2 O 3 When the catalyst is present, the dehydration reaction is carried out at 200-400°C to produce crude dimethyl ether, which is separated by rectification to obtain dimethyl ether.

Embodiment 3

[0041] Add 0.05Kg of liquefied petroleum gas and 0.10Kg of propane into the steel cylinder in turn, and then inject 35Kg of dimethyl ether to obtain an industrial gas product containing 70% of dimethyl ether, 10% of liquefied petroleum gas, and 20% of propane.

[0042] The dimethyl ether is made of methanol as raw material, and it is in γ-Al 2 O 3 When the catalyst is present, the dehydration reaction is carried out at 200-400°C to produce crude dimethyl ether, which is separated by rectification to obtain dimethyl ether.

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PUM

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Abstract

This invention discloses an industrial fuel gas used for metal cutting and welding. Additive and dimethyl enther are added to cylinder to make-up the fuel, dimethyl enther is 40~99.9% and other rest additive. The additive is consisted by one or any several kind of following fuels as arbitrary proportion, petroleum liquefied gas, propane, butane, propylene, pentane, clean oil, methanol, ethanol. This invention has good burning property, security, environmental protection capability and extra high burning flame temperature. Comparing to acetylene, it is not easy to bomb, and its storage, transportation, using and management is more convenient and safe. There is no pollution to environment and operator. Its preheating and cutting velocity is fast, welding and welding line quality is good, oxygen consumption is low, so it improves work efficiency and reduces cost.

Description

Technical field [0001] The invention relates to an ether hydrocarbon fuel gas, in particular to an industrial fuel gas using dimethyl ether as the main raw material for metal cutting and welding. Background technique [0002] Since acetylene is a very flammable, explosive, and difficult to store and transport gas, the traditional industrial gas used for metal cutting and welding is mainly to dissolve acetylene. Dissolved acetylene is produced using calcium carbide as raw material, and the production process consumes high energy and brings corresponding pollution. Although the safety of dissolved acetylene has been significantly improved, there are still many drawbacks-high energy consumption, heavy pollution, explosiveness, high cost, inconvenient transportation and storage, and extremely strict requirements for use. In recent years, there have been too many vicious explosions and fire accidents in the production, transportation and use of dissolved acetylene. Therefore, it is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/00
Inventor 郑长同王银珠冯友茵曹宝成
Owner 郑长同
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