Novel dimethyl ether acetylene mix welding gas

Abstract

The invention discloses a novel mixed welding and cutting gas of dimethyl ether and acetylene, which is characterized in that the invention directly mixes the dimethyl ether and the dissolved acetylene directly and both of the dimethyl ether and the dissolved acetylene are filled in a pressure vessel without an additive according to the proportion range of 20 to 90 percent of dimethyl ether and 80 to 10 percent of acetylene. The welding and cutting gas has simple structure, is cheap and easy for preparing, the heat value of the invention can be adjusted, and the invention overcomes the technical prejudice.

Description

technical field [0001] The invention relates to the technical field of welding and cutting gas, in particular to a novel dimethyl ether acetylene mixed welding and cutting gas. Background technique [0002] Dimethyl ether is a new type of fuel produced from petroleum, natural gas and coal. Because of its high oxygen content, complete combustion, and exhaust emissions that can meet the most stringent Euro V standards, it is known as "the clean fuel of the 21st century". With the maturity of large-scale production technology, the cost of dimethyl ether has been greatly reduced, and it has been able to meet the requirements of civilian fuel and automobiles. However, the direct combustion flame temperature of dimethyl ether is low, only about 2300°C, so it is difficult to be directly used for metal welding and cutting. [0003] In order to use dimethyl ether in the industrial cutting market, CN1468942A discloses a fuel gas, which consists of 40-58% dimethyl ether, 23-40% lique...

AI Technical Summary

Problems solved by technology

[0006] (1) Acetylene molecules contain unsaturated bonds, are active in nature, and have a high risk of explosion;

[0007] (2) The operation process is prone to tempering and accidents;

[0008] (3) Insufficient combustion during the ignition process, mixed with a large amount of black smoke;

[0009] (4) The flame temperature is too high, resulting in collapse and slag hanging, which affects the cutting quality;

[0010] (5) The price is too high

However, its disadvantage is that dimethyl ether and acetylene are packaged separately, requiring two gas cylinders, which occupy a large volume and are inconvenient to carry, and the dimethyl ether and acetylene are only mixed when they are burned, the mixing ratio is difficult to control, and the use effect is not optimal.