Anti-overflow device for hydrochloric acid dropping tank

Abstract

The invention discloses an anti-overflow device for a hydrochloric acid dropping tank. The top of the hydrochloric acid dropping tank is connected to a hydrochloric acid transfer tank in a lower position in a space through a feeding pipeline; and the bottom of the hydrochloric acid dropping tank is connected to a containing unit via a pipeline. Particularly, the lateral wall of the hydrochloric acid dropping tank in a certain height position is provided with an anti-overflow pipe in a connecting manner, and two ends of the anti-overflow pipe are communicated with the hydrochloric acid dropping tank and the hydrochloric acid transfer tank. By applying the anti-overflow device disclosed by the invention, the anti-overflow pipe is additionally arranged to the device in the prior art, the anti-overflow pipe can prevent the running phenomenon caused by overfull feeding, meanwhile, the air pressure inside the hydrochloric acid dropping tank is balanced, and an exhaust port does not need to be formed, so that potential accidents are eliminated from the source, pollution to the atmosphere caused by volatilizing and leaking of hydrochloric acid is completely eradicated, loss of materials is reduced, and the utilization rate of the materials is improved.

Description

technical field [0001] The invention relates to an anti-overflow device, in particular to an anti-overflow device for a hydrochloric acid dripping tank. Background technique [0002] In the production process of the chemical product R-(+)-2-(4-hydroxyphenoxy)propionic acid, there is a step of acid analysis. After the synthesis reaction is completed, 30% hydrochloric acid is added dropwise to the reaction solution to crystallize the product Precipitate. [0003] In the prior art, the hydrochloric acid dripping tank is provided with an upper feeding port, an upper venting port, and a bottom dripping port. The upper feeding port is used to feed the dripping tank, and the upper venting port is used to suck in air (breathing port) when feeding and dropping, so as to keep the air pressure inside and outside the tank balanced. During the feeding operation of this dropping tank, a large amount of acid gas will be discharged from the emptying port, which will pollute the ambient ai...

AI Technical Summary

Problems solved by technology

During the feeding operation of the dropping tank, a large amount of acid gas will be discharged from the emptying port, which will pollute the ambient air.

There is also a potential safety hazard, that is, when the operator is preparing materials for the dripping tank, if he neglects to forget, it will cause the dripping tank to overflow, causing irreparable losses and environmental pollution.

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