A device for removing hydrogen fluoride in tail gas by using dynamic wave and its realization method

A realization method, dynamic wave technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of low absorption efficiency, difficult separation of sedimentation, nozzle clogging, etc., and achieve simple structure, less one-time investment, The effect of reducing clogging
CN105536474BActive Publication Date: 2018-03-27ZHEJIANG AVILIVE CHEM CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG AVILIVE CHEM CO LTD
Publication Date
2018-03-27

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Abstract

The invention discloses a device for removing hydrogen fluoride from tail gas by virtue of dynamic waves. The device comprises a primary dynamic power absorption tower, wherein the primary dynamic wave absorption tower is connected with a secondary dynamic power absorption tower; a first water pump is arranged between the primary and secondary dynamic wave absorption towers; the primary dynamic power absorption tower is connected with a settling tank through a second water pump; the settling tank is connected with a filter pressing and washing kettle which is connected with a centrifuge and a mother liquor tank respectively; the centrifuge is connected with the mother liquor tank; the mother liquor tank is connected with a neutralizing tank and a circulating absorption liquid tank through a third water pump respectively; the neutralizing tank is connected with the circulating absorption liquid tank which is connected with the secondary dynamic wave absorption tower through a fourth water pump; the neutralizing tank is connected with a de-condensed calcium chloride pipe through a fifth water pump. The invention further discloses an implementation method for the device for removing the hydrogen fluoride from the tail gas by virtue of the dynamic waves. The device has the characteristics of simple structure, low construction cost, low production cost, high defluorination efficiency, low liquid-gas ratio, convenience for overhauling and the like.
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Description

technical field

[0001] The invention relates to tail gas treatment technology when trichloromethylpyridine and hydrogen fluoride are reacted to prepare trifluoromethylpyridine, in particular to a device for removing hydrogen fluoride in tail gas by using dynamic wave and its realization method. Background technique

[0002] In the production process of synthesizing hydrofluorocarbons with chlorinated hydrocarbon compounds and hydrogen fluoride, the by-product hydrogen chloride contains a certain amount of hydrogen fluoride. Due to the existence of hydrogen fluoride, the application range of hydrogen chloride is limited. Therefore, the removal of hydrogen fluoride in the by-product hydrogen chloride is very important for the effective utilization of the by-product hydrogen chloride.

[0003] At present, two kinds of fluoride removal methods are commonly used, namely dry separation method and wet separation method. Dry separation method is often used for defluorination of anh...

Claims

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