A cold precipitation crystallizer for chemical production

Abstract

The invention relates to the technical field of chemical production equipment, and discloses a cold precipitation crystallizer for chemical production, including a shell, the inside of the shell is provided with a mounting column, and the left and right ends of the mounting column are fixedly connected with an air outlet pipe A cooling chamber is opened on the inner wall of the housing, and the air outlet pipe runs through the inner wall of the housing and is located inside the cooling chamber. The cold precipitation crystallizer used in chemical production drives the main gear to rotate through the auxiliary electrode, and the secondary transmission gear rotates. When crystals adhere to the inside of the shell, the auxiliary motor is turned on to drive the cam at the other end of the installation shaft to rotate. Rotate the movable plate at the top of the cam and move up and down to drive the lifting movement of the lifting rod and the lifting block at the top, and the installation ring at the top of the lifting block drives the stirring rod to do reciprocating lifting movement immediately. The brush then scrapes the inner wall of the housing to achieve the advantage of not sticking to the wall.

Description

technical field [0001] The invention relates to the technical field of chemical production equipment, in particular to a cold crystallizer for chemical production. Background technique [0002] After the hot saturated solution is cooled, the solute is supersaturated due to the decrease in solubility, and the solute is precipitated in the form of crystals. This process is called crystallization. Among them, the crystallizer is the equipment used for crystallization operation. In the process of chemical production, the solid mother liquor containing crystals generated after concentration enters the crystallizer for the crystallization process, and then sent to the centrifuge for crystallization separation, so as to obtain pure solid crystals. [0003] Existing cold precipitation crystallizer usually comprises a tank body and is used for holding rice supersaturated solution by lowering the temperature of tank body so that heat saturated solution precipitates crystal, but in th...

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Problems solved by technology

[0003] Existing cold precipitation crystallizer usually comprises a tank body and is used for holding rice supersaturated solution by lowering the temperature of tank body so that heat saturated solution precipitates crystal, but in this process because the crystal that separates out has certain under the situation that contains moisture It is sticky, so it will adhere to the inner wall of the tank, and it will produce scale that is difficult to remove after a long time. If it is not removed in time, it will have a great impact on the next cold crystallization

[0004] The existing cold precipitation crystallizer usually sets a discharge pipe for outputting crystals at the bottom of the tank, but the size of the crystals produced by cold precipitation is not uniform and has a certain degree of adhesion, which leads to partial precipitation. The crystals will block the discharge pipe and cause the mother liquor to fail to discharge normally

[0005] At the same time, the existing cryogenic crystallizers generally use low-temperature cooling water as cooling energy when performing cooling operations. In order to ensure that the cooling temperature is not affected, flowing cooling water is usually used for cooling. The mother liquid inside the body is not used after heat exchange, and large-scale use is easy to waste water resources

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