Continuous drying process and equipment for cyclohexanone oximation catalyst

Abstract

The invention provides a continuous drying process and equipment for a cyclohexanone oximation catalyst, which solve the material viscosity problem and realize the process course of continuous and clean drying of a slurry liquid material. The invention provides matching equipment of the drying process at the same time. The process course comprises the following steps of: adding catalyst slurry from a material inlet of a primary blade dryer through a feed pump; heating, drying and solidifying the slurry material in the process of conveying to a material outlet of the dryer, and then entering a secondary blade dryer; and continuously heating the material in the secondary blade dryer, and drying until reaching the water content required by the process to obtain a catalyst product, wherein dust impurities of a carrier gas are filtered via an air filter, the carrier gas is heated via an air heater and mixed with water vapor which is evaporated from the primary and secondary blade dryers, then a mixture is introduced to a dust catcher so as to catch catalyst dusts carried by the evaporated water vapor in the drying process, and the dedusted and purified mixed gas is discharged via a draught fan.

Description

technical field [0001] The invention belongs to the field of catalyst drying for cyclohexanone oximation in the production process of caprolactam, and relates to a continuous drying, clean and efficient drying process and a corresponding complete set of equipment. Background technique [0002] Cyclohexanone oximation is an important step in the production of caprolactam. In 1943, the German company first realized the industrial production of caprolactam through the synthesis of cyclohexanone-hydroxylamine (now referred to as the oxime method). With the development of the synthetic fiber industry, the demand for caprolactam has increased year by year, and it has become an important chemical raw material with a wide range of uses. At present, my country's large-scale caprolactam production line, such as the 140,000 t / a caprolactam production line of Sinopec Baling Branch, and the 160,000 t / a production line of Sinopec Shijiazhuang Chemical Fiber Co., Ltd. The traditional batc...

AI Technical Summary

Problems solved by technology

The drying process has problems such as small processing capacity, long drying cycle, high labor intensity, and poor on-site environment.

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