Energy-saving quality-improving type adipic acid crystallizer discharging device and discharging process

Abstract

The invention discloses an energy-saving quality-improving adipic acid crystallizer discharging device and a discharging process. The device comprises a crystallizer and a receiving tank, a stainless steel pipeline with a certain gradient is arranged between the crystallizer and the receiving tank, and a discharging electromagnetic valve, an electromagnetic flow meter, a guide sprayer and a hand valve are sequentially arranged on the stainless steel pipeline. A hot water pipeline is arranged below the discharging electromagnetic valve, one end of the hot water pipeline communicates with the stainless steel pipeline, the other end communicates with a public hot water main pipe, and a hot water electromagnetic valve is arranged on the hot water pipeline. The maintenance cost and the operation difficulty are reduced, the potential safety hazard is eliminated, and the stable operation of the device is ensured; interference of a centrifugal pump impeller on granularity is eliminated, the subsequent separation effect is guaranteed, subsequent liquid-solid phase separation and fluidized bed drying are facilitated, and meanwhile the moisture content and the nitric acid content in the product are remarkably reduced; after the implementation of the invention, the liquid level control of the crystallizer becomes more stable, and the stable product quality is ensured.

Description

technical field [0001] The invention relates to the technical field of adipic acid crystallizers, in particular to an energy-saving and high-quality adipic acid crystallizer discharging device and a discharging process. Background technique [0002] Adipic acid can be produced industrially by the reaction of cyclohexanol and excess nitric acid solution, and then it needs to be crystallized and separated from the reaction slurry. After the crystal is obtained through the crystallizer, the crystal slurry needs to be separated, and finally a dry powder is obtained. Finished products; in the crystallization process of the crystallizer, the particle size of the crystallized product needs to be well controlled, otherwise it will affect the moisture, acid content and iron content in the product. [0003] Prior art adipic acid crystallizers, such as figure 2 As shown, the outlet of the crystallizer is connected with a vertical stainless steel pipeline 2, and the stainless steel pip...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an energy-saving and quality-improving type adipic acid crystallizer discharge device and discharge process, which uses the siphon principle to achieve the purpose of fluid transportation, saves energy, and avoids the mechanical wear of the crystal particles by the impeller of the pump at the same time. It is beneficial to subsequent separation, improves product quality, and solves the problems of difficult discharge, complicated operation and low discharge efficiency of adipic acid crystallizer

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