Acetylene drying process and equipment thereof

Abstract

The invention discloses an acetylene drying process and equipment thereof. The process comprises the following steps of: conveying acetylene into an acetylene solid caustic soda drying tower, controlling the flowing speed at 2m / s, feeding acetylene gas into a first-stage acetylene drying tower when the water content of acetylene of which the pressure is 0.1MPa is lowered to 2,000ppm, and feeding into a second-stage acetylene drying tower when the water content is lowered to 700ppm; conveying acetylene gas which is exhausted out of the second-stage acetylene drying tower and of which the watercontent is lower than 10ppm into a subsequent utilization system; and returning acetylene gas of which the water content is higher than 10ppm into an acetylene gas cabinet for drying once again. The equipment comprises an acetylene solid caustic soda drying tower, a first-stage acetylene drying tower and a second-stage acetylene drying tower which are communicated in sequence. The acetylene drying process has the advantages that good dewatering effect, easiness for equipment operation, running safety, avoidance of pollution, capability of fully drying the acetylene gas, saving in cost, increase in economic efficiency and capability of lowering the water content of acetylene from 3,000-5,000ppm to 10ppm.

Description

technical field [0001] The invention relates to a drying process, in particular to an acetylene drying process and its equipment, belonging to the field of acetylene production. Background technique [0002] Acetylene is lively and widely used. It is the main raw material for the production of vinyl chloride, trichlorethylene, acrylonitrile, acetic acid acetate, chloroprene rubber and other products. At present, the domestic production of acetylene is mostly wet method, and the water content in acetylene High, downstream processes are prone to catalyst poisoning or equipment corrosion. In particular, the water content of acetylene has a great impact on the conversion process of vinyl chloride, because the mixed dehydration effect will affect the production capacity of the conversion and the service life of the mercuric chloride catalyst. Therefore, in order to make it run stably for a long time, the mixed gas must be strictly controlled. moisture. If the water content in a...

AI Technical Summary

Problems solved by technology

30T of hydrochloric acid per year is extremely harmful to the corrosion of the entire conversion system. At the same time, the chloride produced due to corrosion will seriously shorten the service life of the catalyst. The annual economic loss caused by equipment corrosion and catalyst poisoning is not less than 6 million yuan

[0003] Domestic acetylene drying and dewatering processes mainly include freeze dehydration, variable temperature and pressure swing adsorption drying, and concentrated sulfuric acid drying; the desiccant mostly uses solid alkali, calcium chloride, concentrated sulfuric acid, molecular sieve, etc., and the water removal effect is mostly above 100ppm. High, poor dehydration effect, easy to produce waste residue, waste water, waste acid, and acetylene explosion and combustion accidents during the drying process

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