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Continuous drying process and equipment for cyclohexanone oximation catalyst

A drying process and drying equipment technology, used in complete sets of equipment, continuous drying, high-efficiency drying, and cleaning fields, can solve the problems of high labor intensity, low processing capacity, poor on-site environment, etc., to reduce labor intensity, meet recycling efficiency, pollution small effect

Inactive Publication Date: 2012-07-04
NANJING TIANHUA CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Continuous drying process and equipment for cyclohexanone oximation catalyst
  • Continuous drying process and equipment for cyclohexanone oximation catalyst

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, the present invention will be further described:

[0027] Such as figure 1 As shown, the continuous drying equipment of the present invention comprises a feed pump 1, two paddle dryers, an air filter 13, a finned tube heater 14, a bag filter 7, a Compressed air heater 10, a fan 9.

[0028] The material pipeline is connected with the feed pump 1, the first-stage paddle dryer 2, and the second-stage paddle dryer 5 in sequence.

[0029] The carrier gas pipeline is connected in sequence with the air filter 13, the finned tube air heater 14 shell side, the gas outlet of the primary paddle dryer 2, the gas outlet of the secondary paddle dryer 5, the bag filter 7, and the fan 9 .

[0030] The heating steam is used as the heating heat source, which is respectively fed into the 14 tubes of the finned tube air heater, the first-stage paddle dryer with 2 paddle shafts and jackets, the second-stage paddle dryer with 5 paddle shaft...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B17/18F26B21/00F26B25/00
Inventor 李仁金赵爽
Owner NANJING TIANHUA CHEM ENG
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