Apparatus for recovering hydrogen fluoride from hydrofluoric acid

Abstract

The invention discloses an apparatus for recovering hydrogen fluoride from hydrofluoric acid. The main body structure of the apparatus comprises a cylinder shell (5), a liner (6), a stirrer (7), stirring blades (9) and a cylinder cover (10), the cylinder shell (5) is cylindrical in shape, the bottom of the cylinder shell (5) is a spherical arm surface, the liner (6) is arranged at the lower portion of the cylinder shell (5), the cylinder cover (10) is fixed on the cylinder shell (5) in a seal manner, the cylinder cover (10) is fixedly provided with a frame (3), the support (3) is fixedly provided with a motor and speed reducer (1), the lower portion of the motor and the speed reducer (1) is coaxially provided with a shaft coupling (2), the stirrer (7) is symmetrically arranged at the tail end of the shaft coupling (2), and a thermometer sleeve (10) goes through a through hole and goes deep to the lower portion of the cylinder shell (5). The apparatus has the advantages of simple operation, stable and reliable running, high hydrogen fluoride recovery efficiency, high product purity, and repeated use of an absorbent.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a device for recovering hydrogen fluoride in hydrofluoric acid. Background technique [0002] At present, the relatively mature HF recovery technology for industrial application is mainly based on the recovery of HF by adsorbent and the recovery of HF by rectification tower. The former takes the adsorption tower as the core production equipment, and the latter mainly uses the rectification tower. [0003] Recovery of HF by distillation tower is a technology widely used in industry at present. Its main process is as follows: a certain concentration of HF-containing solution enters the HF recovery tower, and in the HF recovery tower, the gas distilled from the top of the tower is condensed by the recovery tower The HF liquid is condensed into the HF liquid, and there is a water HF solution in the tower kettle to continue to recover HF, and then circulate back to the ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the nature of hydrofluoric acid, it has the following disadvantages: 1) The combination of the two is very stable and difficult to separate; 2) HF and water form an azeotrope, and the azeotrope is HF-H 2 The O form exists, and the obtained HF content is low; 3) HF and H 2 O forms hydrofluoric acid, which is particularly corrosive to equipment

However, in the practical application of this technology, due to the fact that the adsorbent is easy to pulverize after adsorbing HF, there are practical problems such as easy blockage of the adsorption tower and poor heat transfer effect, which affect the overall recovery rate.

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