A kind of circulating pyrolysis gas quenching equipment

Abstract

The invention relates to a circulating pyrolysis gas quenching device and belongs to the field of chemical engineering processing equipment. The circulating pyrolysis gas quenching device comprises a quencher, and the quencher is provided with an acetic acid pyrolysis gas feeding pipe, an ethenone discharging pipe, a cooling water inlet pipe, a cooling water return pipe and a non-pyrolyzed acetic acid discharging pipe. The other end of the non-pyrolyzed acetic acid discharging pipe is connected with a three-way valve, the three-way valve is further connected with a discharging pipe and a recycling pipe, the recycling pipe is connected with a small resistance furnace for re-processing non-pyrolyzed acetic acid into acetic acid pyrolysis gas, the small resistance furnace is provided with a secondary discharging pipe, and the secondary discharging pipe is connected with the acetic acid pyrolysis gas feeding pipe. The circulating pyrolysis gas quenching device has the advantages that remaining acetic acid in a reaction is re-synthesized into the acetic acid pyrolysis gas to be input into the quencher again, and the whole process does not interfere with the acetic acid pyrolysis gas directly conveyed in the outside world.

Description

technical field [0001] The invention belongs to the field of chemical processing equipment, in particular to a circulating cracking gas quenching equipment. Background technique [0002] The acetic acid cracking gas is used in the synthesis process of ketene, but the acetic acid cracking gas cannot guarantee 100% complete reaction in the quencher, so the acetic acid flowing out of the recovery pipe must be recovered and collected, and then re-transported to the relevant process Reuse will reduce the production efficiency, so it is necessary to design a production equipment that can directly reapply the recovered acetic acid to the synthesis reaction without the need for temporary storage. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a circulating pyrolysis gas quenching equipment, which can be recycled for reaction of pyrolysis acetic acid, thereby improving the reaction efficiency of raw materials. [0004...

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Problems solved by technology

[0002] The acetic acid cracking gas is used in the synthesis process of ketene, but the acetic acid cracking gas cannot guarantee 100% complete reaction in the quencher, so the acetic acid flowing out of the recovery pipe must be recovered and collected, and then re-transported to related processes Reuse, which will reduce production efficiency, so it is necessary to design a production equipment that can directly re-use the recovered acetic acid in the synthesis reaction without the need for temporary storage

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