I. Cyclohexanone Deuteration Catalyst Blade Dryer--Overview of Equipment

Cyclohexanone deuteration catalyst disc blade dryer continuous drying process and equipment technical field, the production process of cyclohexanone deuteration catalyst drying, involving a continuous drying, cleaning, efficient drying process, and its corresponding set device.

Deuteration of cyclohexanone is an important part of the production of caprolactam. With the development of the synthetic fiber industry, the demand for caprolactam has increased year by year, and has become an important chemical raw material, and has a wide range of uses.

At present, China's large-scale caprolactam production line, such as Sinotrans's Baling branch, 140,000 t / a caprolactam production line, Sinopec Shijiazhuang Chemical Fiber Co., Ltd. expanded the scale of 160,000 t / a production line, etc., its cyclohexanone amine deuteration catalyst drying process Both are traditional batch and intermittent drying processes, and the drying process is completed in a drier drying facility.

Take IOm3, 85% moisture catalyst raw material as an example, the heat source uses 0.5MPaG, 165 °C water vapor, and the product moisture content is required to be <4%. The existing drying process is dried in batches using a rake dryer. Single batch drying material Im3, drying time is about 40 hours, single discharge time is 0.5 hours. The drying cycle takes about 45 hours and the water vapor consumption is 24600 kg.

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

A process in which a cyclohexanone amine deuteration catalyst is continuously dried. The problem of material viscosity is solved, and the process of continuous, clean and dry slurry liquid material is realized.

The cyclohexanone oxime catalyst drying equipment adopts an optimized combination to achieve continuous drying and improve production efficiency.

The continuous drying process of cyclohexanone amine deuteration catalyst is as follows: the catalyst slurry is fed from the inlet of the first stage paddle dryer by the feed pump, and the slurry material is heated and dried and solidified in the operation of the material outlet of the dryer, and then enters. The second stage paddle dryer, in the secondary paddle dryer, the material is further heated and dried to the required water content to obtain a catalyst product; wherein the carrier gas is filtered by the air filter to filter the dust impurities, through the finned tube The air heater is heated, and then mixed with the water vapor evaporated from the first and second stage dryers, and then passed into a bag filter to capture the catalyst dust entrained by the evaporated water vapor during the drying process; the mixed gas after the dust removal and purification is introduced The fan is vented.

 

The bag type dust collector is cleaned by hot back blowing gas, which can effectively prevent the back blowing gas from entering the dust collector, and the possibility of condensation of the carrier gas. The back-blowing gas adopts compressed air, and after the compressed air is heated by the compressed air heater, the bag type dust remover is cleaned by the pulse electromagnetic valve timing.

 

The cyclohexanone oxime catalyst drying equipment dust collector adopts a bag type dust remover; the filter bag of the bag type dust remover adopts a film filter material; the shell of the bag type dust remover is provided with a heat tracing structure.

 

Cyclohexanone oxime catalyst continuous drying equipment, including feed pumps, air filters and air heaters, dust collectors, and dryers,

 

 

The cyclohexanone oxime catalyst continuous dryer adopts two paddle dryers and is divided into two stages of drying; the catalyst material pipeline is connected to the feed pump, the first stage paddle dryer, the second stage paddle dryer in sequence; the carrier gas pipeline Connect air filter, air heater shell side, first stage pad dryer gas outlet, second stage pad dryer gas outlet, bag type dust collector, fan; heating steam line respectively connected to air heater tube, one Stage paddle dryer blade shaft and jacket, secondary paddle dryer blade shaft and jacket, compressed air heater tube.

 

The cyclohexanone oximation catalyst continuous drying equipment satisfies the requirements of the continuous drying process of the cyclohexanone oximation catalyst. The use of the paddle dryer not only achieves continuous drying, but also has its own self-cleaning function of viscous materials, which solves the technical difficulties of high moisture content, strong fluidity and large viscosity change during the drying process of liquid materials, in the paddle dryer equipment. The whole process of evaporation, concentration, solidification and drying is realized.

 

Jiangsu Bohong's production process of cyclohexanone amine deuteration catalyst improves indirect drying to continuous drying, simplifies the production process, reduces labor intensity, improves the operating environment, and reduces the operating costs of manual unloading and cleaning. Increased production efficiency and reduced drying time. Low energy consumption, low pollution and easy operation.