A method for optimizing the reaction control of mercury-free catalyzed synthesis of vinyl chloride by using ventilating components

Abstract

The invention provides a control method for optimizing the reaction of mercury-free catalyzed synthesis of vinyl chloride by using a ventilating member. By setting a long rod-shaped ventilating member at the center of the converter tube, the raw material gas enters the tube-and-tube converter from the upper part, According to a certain ratio, part of it enters the annular catalyst bed, and part of it enters the ventilation component. The raw material gas entering the ventilation component flows from top to bottom along the axial direction of the ventilation component, and at the same time diffuses outward through the ventilation pores of the ventilation component in the radial direction. , into the annulus catalyst bed, thereby improving the contact path between the raw material gas and the catalyst, making the catalyst bed react evenly, and improving the temperature distribution of the converter from top to bottom and the catalyst bed in the tube from the inside to the radial direction; It can help to improve the effective utilization area of ​​the heat exchange tube of the converter, reduce the phenomenon of runaway temperature, prolong the service life of the catalyst, reduce the resistance of the bed layer of the converter, and improve the production efficiency of the catalyst and the device.

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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