A kind of using method of preparing hydrogen fluoride circulating fluidized bed rectification device

Abstract

The invention relates to the technical field of fluorine chemical industry, in particular to a method for preparing hydrogen fluoride circulating fluidized bed rectification device, which is characterized in that: the crude hydrofluoric acid liquid flows from the feed liquid conduit designed in the middle of the circulating fluidized bed rectification tower Enter and inject into the liquid receiving plate, the crude hydrofluoric acid liquid is evenly distributed in the liquid plate and then drips into the reboiler. The disk enters the multi-stage cyclone condenser, and the liquid droplets carried by the rising steam are separated by the cyclone to form a continuous liquid film on the wall of the multi-stage cyclone condenser. The purity of the hydrogen fluoride liquid condensed by the condenser is continuously improved and drawn out from the bottom.

Description

Technical field [0001] The present invention relates to the field of fluorochemical techniques, and more particularly to the use of the preparation of a fluoride circulating fluidized bed rectification device. Background technique [0002] Hydrogen fluoride has been widely used in electronics, chemical, petroleum and other industries, mainly used as a fluorine salt, fluorine halide, fluorine refrigerant, corrosion glass, impregnated wood, electrolytic element fluorine, etc., its rectification device is produced by water One of the key equipment of hydrogen fluoride. The Chinese invention patent (patent No. CN 2010 20651387.4, the patent name is anhydrous hydrogenide rectification tower) discloses anhydride-free hydrogenide rectification tower, which comprises a tower body, a tower, and an reboiler, the tower. The kettle is provided at the bottom of the tower body and communicates directly with the tower body, and the top and bottom of the reboiler are connected to the tower side ...

AI Technical Summary

Problems solved by technology

[0003] The technical solutions proposed by prior art 1 and prior art 2 are rectification towers. The current rectification towers are generally plate towers or packed towers using structured packing. Packed towers are selected as rectification process devices, which are suitable for fast and instantaneous reactions. The process has the advantages of high specific surface area, high gas film mass transfer coefficient, and reduced gas phase flow pressure. The disadvantage is that the liquid storage volume is small and the liquid stays in the packed tower for a short time; the plate tower is selected as the rectification process device, which is suitable for In the fast and medium speed reaction process, it has the advantages of small liquid backmixing, uniform residence time, and large liquid film mass transfer coefficient. The disadvantages are complex structure, large gas phase pressure drop, and low corrosion resistance of the tower internals.

In summary, due to the limitation of the liquid storage capacity of the packed tower and the plate tower, the processing capacity is small, the mass transfer efficiency is low, the pressure drop is large, and the operating flexibility is small

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