Low-temperature liquid synthetic welding gas

Abstract

The invention discloses a low-temperature liquid synthetic welding gas, which is prepared by the following steps of: using liquefied natural gas as a main fuel; adding a high energy fuel with low melting point into the liquefied natural gas, wherein the high energy fuel with low melting point is prepared from ingredients according to the following volume ratio: 5-10% of nbutyl trimethyl methane, 6-12% of ethylbenzene, 18-25% of anhydrous ethanol, 13-21% of ethylene glycol monobutyl ether, 11-18% of butanone, 10-17% of isopentane, 7-15% of ethyl cyclohexane and 2-3.5% of borane; mixing a synthetic mixed liquid with propane C3H8 or tetrahydrothiophene C4H8S according to the proportion of 3-5%; and adding the mixed high energy fuel with low melting point into the liquefied natural gas according to the proportion of 1.5%. Dispersiveness of various fuels is raised, and the fuels can be more uniformly mixed with the liquefied natural gas. The gasification rate of the liquefied natural gas is enhanced by the adoption of high proportion of propane or tetrahydrothiophene, the quality of the fuels is raised, and the effect is obvious.

Description

technical field [0001] The invention relates to a high-performance metal welding and cutting gas, in particular to a low-temperature liquid synthetic welding and cutting gas. Background technique [0002] At present, in the field of metal welding and cutting, acetylene gas is mainly used as the main raw material gas for metal welding and cutting. Due to the high temperature of the acetylene flame, it is generally used in the field of metal processing. Therefore, most of the industrial welding and cutting gas consumption in my country still uses acetylene gas. . [0003] With the development of productivity and the progress of society, people have a clearer understanding of the disadvantages and defects exposed by acetylene gas. In the 1970s, developed countries in Europe, America, and Japan began to phase out acetylene gas and replaced it with industrial gases such as propane, propylene, and natural gas. [0004] According to statistics, in 2006, the calcium carbide industr...

AI Technical Summary

Problems solved by technology

However, for low-temperature liquefied natural gas, the above-mentioned combustion-supporting additives cannot be used directly because the temperature of liquefied natural gas is lower than -160°C. If the above-mentioned combustion-supporting additives are added to the LNG cylinder, the combustion-supporting additives will solidify and form blockages, causing equipment damage to