Multi-section reaction tower for polyoxymethylene dimethyl ether synthesis and polyoxymethylene dimethyl ether synthesis process unit

Abstract

The invention discloses a multi-section reaction tower for polyoxymethylene dimethyl ether synthesis and a polyoxymethylene dimethyl ether synthesis process unit. A tower body of the multi-section reaction tower comprises at least two layers of reaction sections from top to bottom; each layer of reaction section is provided with a tower plate and forms a bent passageway; catalysts are arranged between the tower plates in a filling manner; gas ascension pipes are arranged between the adjacent layers of reaction sections; a gas phase outlet is formed in the tower top of the reaction tower; and each layer of reaction section is provided with an inlet with a valve and an outlet with a valve. According to the multi-section reaction tower for polyoxymethylene dimethyl ether synthesis and the polyoxymethylene dimethyl ether synthesis process unit, the conversion equilibrium point of the reaction is effectively controlled, the advancement of the reaction equilibrium toward bigger polymers is effectively deferred, the conversion rate and the selectivity are improved, the reaction is carried out under the conditions that the catalyst activity is relatively high and the temperature does not excessively influence the reaction equilibrium, and good conversion rate and selectivity are obtained.

Description

technical field [0001] The invention belongs to the technical field of chemical production technology and equipment, and mainly relates to a production process method and device of polyoxymethylene dimethyl ether. Background technique [0002] The characteristics of my country's energy structure are: rich in coal, poor in oil, and low in gas. The sustained and rapid economic growth requires more and more energy, and the contradiction between social and economic development and oil supply has become increasingly prominent. Since 2009, my country's dependence on foreign crude oil has exceeded the warning line (50%) for six consecutive years, seriously affecting my country's energy strategic security. From the perspective of my country's energy strategy and security, combined with the characteristics of my country's primary energy structure, the development of coal-based liquid fuel synthesis technology is undoubtedly of strategic importance. In addition, my country's methanol...

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Problems solved by technology

[0004] Purpose of the invention: In view of the above-mentioned existing problems and defects, the present invention provides a multi-stage reaction tower for polyoxymethylene dimethyl ether and a polyoxymethylene dimethyl ether synthesis process device, which solves the problem of paraformaldehyde The problems of high cost, low synthetic conversion rate and low yield brought about in the trimerization production process, and the fixed bed reactor of the present invention has a good heat removal effect and can adjust the degree of product conversion, can efficiently promote the reaction, and the conversion degree of controllability

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