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Adipic acid crystallization system

A technology of crystallization system and adipic acid, which is applied in the field of chemical equipment, can solve the problems of reducing the evaporation area and affecting the crystallization effect, so as to increase the production load, reduce the unit consumption of products and the pressure of environmental protection treatment, and improve the effect of evaporation

Active Publication Date: 2015-04-01
HENAN SHENMA NYLON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem of the existing multi-compartment adiabatic vacuum evaporation crystallizer that affects the crystallization effect due to the reduction of the evaporation area, the purpose of the present invention is to provide an adipic acid crystallization system

Method used

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  • Adipic acid crystallization system

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Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a kind of adipic acid crystallization system comprises evaporation tank 1, and vertically is provided with 0.8 meter high overflow plate 2 in evaporation tank 1, and overflow plate 2 top is vertically provided with 1.0 meter long evaporation plate 3, evaporates The liquid phase outlet of the tank 1 is connected to the slurry pump 4, the gas phase outlet of the evaporation tank 1 is connected to the gas phase condenser 5, the gas phase outlet of the gas phase condenser 5 is connected to the vacuum pump 7 with the air pipeline 6, and the air pipeline 6 is equipped with a regulator valve 8.

[0021] Working principle: The overflow plate 2 and the evaporation plate 3 are installed in the evaporating tank 1, which divides the room into two parts A and B. The air F flows into the air pipeline 6 through the control valve 8, and the pressure of the evaporating tank 1 is passed through the vacuum pump. 7 and regulating valve 8 are controlled in the re...

Embodiment 2

[0023] The difference with embodiment 1 is: the overflow plate 2 is high 1.2 meters and the flash plate 3 is long 1.5 meters; the supersaturated adipic acid slurry D is sent to the centrifugal separator of the back process through the slurry pump 4 for further Thickened and centrifuged.

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Abstract

The invention belongs to the technical field of chemical equipment and discloses an adipic acid crystallization system. The adipic acid crystallization system comprises an evaporation tank, wherein an overflow plate is vertically arranged in the evaporation tank, the top end of the overflow plate is vertically provided with an evaporation plate, the liquid phase outlet of the evaporation tank is connected with a slurry pump, the gas phase outlet of the evaporation tank is connected with a gas phase condenser, the gas phase outlet of the gas phase condenser and an air pipeline are converged and connected to a vacuum pump, and the air pipeline is provided with a regulating valve. The dual-liquid level evaporation tank is adopted by the adipic acid crystallization system so as to increase the evaporation area and improve the evaporation effect, and the adipic acid crystallization system can process an adipic acid solution into a supersaturated solution with certain crystal nucleuses or crystalline particles from an unsaturated solution by controlling the crystalline particles through pressure; and the supersaturated solution with certain crystal nucleuses or crystalline particles can be applied in next processes for thickening centrifugal separation and early-stage processing in a conventional multi-chamber crystallizer. Gas phase condensate of the adipic acid crystallization system can be recycled so as to reduce the unit consumption of products and pressure of environmentally-friendly processing.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to an adipic acid crystallization system. Background technique [0002] There are many types of equipment for realizing the crystallization of adipic acid. A crystallizer with nine compartments is disclosed in CN2922986Y, which utilizes the principle of adiabatic evaporation to cool down the material and precipitate crystallization. The crystallizer is equipped with a siphon, an injector, and a condenser. , mixer and other structures can realize the crystallization of adipic acid from the solution. [0003] In CN201558557U, a kind of adipic acid vacuum concentration kettle with steam jacket and agitator is disclosed, negative pressure is generated by vacuum pump, and jacket is connected with steam pipeline for heating, and a large amount of water in the solution evaporates under the effect of negative pressure and heating , to achieve the purpose of concentra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02C07C51/43C07C55/14
Inventor 潘强杨炎锋李本斌赵铎金保国刘镇江许永锋孙浩杰赵瑞薛继平王君超郭华强
Owner HENAN SHENMA NYLON CHEM