Efficient cooling crystallization kettle

Abstract

The invention discloses an efficient cooling crystallization kettle. The efficient cooling crystallization kettle is provided with a kettle body; a jacket used for containing ice salt water is mountedon the outer wall of the kettle body in a sleeving mode, and an ice salt water inlet and an ice salt water outlet are formed in the jacket; a feeding inlet and an exhaust gas outlet are formed in thetop of the kettle body, and a discharging outlet is formed in the bottom of the kettle body; a fixed seat is arranged at the top of the kettle body, and a stirring motor and a reduction gearbox matched with the stirring motor are mounted on the fixed seat; the output end of the reduction gearbox is connected with a rotary shaft stretching into the kettle body, and a stirring impeller is mounted at the bottom end of the rotary shaft; control valves are mounted on pipelines where the feeding inlet and the discharging outlet are located correspondingly; and a condenser is mounted on a pipeline where the exhaust gas outlet is located. The efficient cooling crystallization kettle is simple in structure, ingenious in design and high in crystallization efficiency, the phenomenon that exhaust gasis scaled on the inner pipe wall of a discharging pipe of the exhaust gas is effectively eliminated, and the safety of crystallization production is also guaranteed.

Description

technical field [0001] The invention relates to the field of crystallization kettle equipment, in particular to an efficient cooling crystallization kettle. Background technique [0002] At present, o-cyanobenzyl chloride is a colorless to jade-colored needle-like crystal with a pungent smell, and is easily soluble in organic solvents such as ethanol, chloroform, acetone, toluene, etc., and its pure product has a melting point of 59.5°C, belonging to a Organic synthesis intermediate, mainly used in the synthesis of stilbene fluorescent whitening agents, such as fluorescent whitening agent ER series, etc. [0003] O-cyanobenzyl chloride products will also produce a large amount of waste gas during the crystallization process in the crystallization tank. The components of the waste gas mainly include unreacted chlorine gas, o-tolunitrile material and hydrochloric acid gas, etc. These waste gases are usually obtained by chlorination. The discharge pipe at the top of the kettle...

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Problems solved by technology

[0003] O-cyanobenzyl chloride products will also produce a large amount of waste gas during the crystallization process in the crystallization tank. The components of the waste gas mainly include unreacted chlorine gas, o-tolunitrile material and hydrochloric acid gas, etc. These waste gases are usually obtained by chlorination. The discharge pipe at the top of the kettle is directly discharged to the outside. During the process of passing through the discharge pipe, the exhaust gas is easily scaled in the pipe wall due to the cold, causing the discharge pipe to be blocked. Once the discharge pipe is blocked, the waste gas generated by the reaction in the crystallization kettle will be unacceptable. If it is discharged in time, the pressure in the crystallization tank will increase, which will affect the production quality of the product and bring certain safety hazards to the normal crystallization production of the crystallization tank.

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