Control method for optimizing reaction of mercury-free catalytic synthesis of vinyl chloride by using gas-permeable member

Abstract

The invention provides a control method for optimizing a reaction of mercury-free catalytic synthesis of vinyl chloride by using a gas-permeable member. According to the method, a long rod-shaped gas-permeable member is arranged at the center of a converter row tube, a raw material gas enters a tubular converter from the upper portion, then according to a certain proportion, partially enters an annular gap catalyst bed layer, and partially enters the gas-permeable member, and the raw material gas entering the gas-permeable member flows from top to bottom along the axial direction of the gas-permeable member, and simultaneously diffuses outward by penetrating through gas-permeable pores of the gas-permeable member in the radial direction to enter the annular gap catalyst bed layer, so thata contact path between the raw material gas and a catalyst is improved, a reaction of the catalyst bed layer is uniform, and temperature distribution of the converter from top to bottom and the radialdirection from inside to outside of the catalyst bed layer in the row tube is improved; and an effective utilization area of a heat exchanger tube of the converter is increased, the temperature-runaway phenomenon is reduced, the service life of the catalyst is prolonged, the resistance of a converter bed layer is reduced, and the production efficiency of the catalyst and the apparatus is improved.

Description

technical field [0001] The invention relates to the field of mercury-free catalytic synthesis of vinyl chloride, in particular to a control method for optimizing the reaction of mercury-free catalytic synthesis of vinyl chloride by using a ventilating member. Background technique [0002] The domestic acetylene process generally uses mercuric chloride loaded on activated carbon as a catalyst, and the reaction is carried out in a fixed-bed reactor. Because mercuric chloride is highly volatile and mercury is highly toxic, the use of mercuric chloride catalysts has resulted in serious mercury loss and mercury pollution. In order to meet the requirements of environmental protection, the synthesis of vinyl chloride from acetylene and hydrochlorination must use a mercury-free catalyst. [0003] In the process of using mercury-free catalysts to synthesize vinyl chloride, for high-activity mercury-free catalysts, due to their high activity, fast reaction speed, and concentrated rea...

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Problems solved by technology

[0003] In the process of using mercury-free catalysts to synthesize vinyl chloride, for high-activity mercury-free catalysts, due to their high activity, fast reaction speed, and concentrated reaction hotspots, after entering the converter, reactions will occur in the upper part. If the heat transfer effect is not good, it will cause Local overheating of the bed near the reaction hot spot will cause damage to the mercury-free catalyst in severe cases, affecting the activity and service life of the mercury-free catalyst, thereby affecting normal industrial production

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