A refined hydrogen recovery device used in pta production process

Abstract

The invention discloses a refined hydrogen recovery apparatus used in a PTA production process. The apparatus is provided with a PTA reaction main body, a gas cooling mechanism, a moisture separationmechanism, a hydrogen recovery mechanism, and a gas collection tank, wherein the PTA reaction main body, the gas cooling mechanism, the moisture separation mechanism, the hydrogen recovery mechanism,and the gas collecting tank constitute a cycle, the gas cooling mechanism cools hydrogen output from the PTA reaction main body through a gas cooling pipe, the moisture separation mechanism eliminatesthe moisture in the hydrogen through internal condensation mechanisms, the hydrogen recovery mechanism collects and recycles and transports the hydrogen into the gas collecting tank, the obtained hydrogen in the gas collecting tank has no moisture and is suitable for use of users. By setting a purification mechanism, the purification mechanism is provided with a purification box, the inside of the purification box is provided with a first purification part and a second purification part, and thereby the moisture in the hydrogen is further absorbed through the first purification part and the second purification part to ensure elimination of the moisture.

Description

technical field [0001] The invention relates to a PTA production equipment, in particular to a refined hydrogen recovery device used in the PTA production process. Background technique [0002] In the PTA production process, in order to ensure the effective removal of 4-CBA and other colored impurities in the hydrogenation reactor, the amount of hydrogen added is seriously excessive, and about 85% of the hydrogen will enter the downstream crystallizer together with the slurry before it can participate in the reaction in the future , and then discharged at a high altitude together with flash steam and other non-condensable gases during crystallization flash evaporation, resulting in a great waste of resources. [0003] Existing PTA production equipment generally also has a hydrogen recovery device, but the existing hydrogen recovery device cannot effectively remove the water doped in the hydrogen, so there is an urgent need for a method that can effectively remove it during t...

AI Technical Summary

Problems solved by technology

[0002] In the PTA production process, in order to ensure the effective removal of 4-CBA and other colored impurities in the hydrogenation reactor, the amount of hydrogen added is seriously excessive, and about 85% of the hydrogen will enter the downstream crystallizer together with the slurry before it can participate in the reaction in the future , and then discharged at high altitude together with flash steam and other non-condensable gases during crystallization flash evaporation, resulting in a great waste of resources

[0003] Existing PTA production equipment generally also has a hydrogen recovery device, but the existing hydrogen recovery device cannot effectively remove the water doped in the hydrogen, so there is an urgent need for a method that can effectively remove it during the hydrogen recovery process. Recycling unit for moisture removal

Images