Azeotropic catalytic reaction tower

Abstract

Provided is an azeotropic catalytic reaction tower. The azeotropic catalytic reaction tower comprises a reaction tower body, wherein a demister is arranged at the inner top of the reaction tower body,an azeotropic dehydration section at the upper part and catalytic sections at the lower part are arranged under the demister, and the azeotropic dehydration section is provided with a tower internalmember; the tower internal member comprises arbitrary one of structured packing or a column plate, an array tube bed comprises a plurality of vertical array tubes, and each array tube is filled with amodule catalyst; a heating liquid flow channel is arranged between outer walls of the array tubes and the inner wall of the reaction tower body, sealing baffles are arranged at the top and bottom ofthe array tube bed so as to seal the upper end and lower end of the heating liquid flow channel, and a plurality of openings which are formed in the baffles communicate with openings at two ends of one corresponding array tube; reaction raw materials flowing downwards from the azeotropic dehydration section sequentially pass through multiple catalytic sections and are discharged, a gas phase outlet is formed in the top of the reaction tower body, and a material outlet is formed in the bottom of the reaction tower body; and a heating liquid inlet and a heating liquid outlet are separately formed in the parts, at the bottom of the array tube bed and the opposite top of the array tube bed, of the sidewall of the reaction tower body, and the middle part communicates with a material inlet in the sidewall of the reaction tower body. Through the azeotropic catalytic reaction tower, the technical problems of a complicated process, long time, dispersion and low efficiency of traditional equipment are solved.

Description

technical field [0001] The invention relates to a paraformaldehyde synthesis device, in particular to an azeotropic catalytic reaction tower. Background technique [0002] Paraformaldehyde is an important chemical raw material with a wide range of applications. The relatively mature synthesis technology route in the current technology is: use 35-45% formaldehyde aqueous solution as raw material, and use liquid sulfuric acid as a catalyst to synthesize paraformaldehyde, which brings inherent disadvantages to the process of synthesizing paraformaldehyde: three wastes are discharged more, production The environment is poor, the process is long, the investment is large, and the production equipment is severely corroded. Therefore, it is imperative to develop a new technology that is efficient, energy-saving, clean and environmentally friendly. [0003] The existing synthesis method is: 35-45% aqueous formaldehyde solution → concentration under reduced pressure → heating at 100°...

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Problems solved by technology

[0004] In order to overcome the defects and deficiencies of the above-mentioned technologies, the present invention provides an azeotropic catalytic reaction tower, which solves the technical problems of complex process, long time, scattered equipment, and inability to efficiently produce paraformaldehyde in an integrated manner in the application process of traditional equipment.

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