The whole production process of Fumei sodium is divided into six processes: alkali dissolution process, mixing process, synthesis process, cooling crystallization process, centrifugation process, and product packaging and warehousing process.
Alkali dissolving process: first, start the alkali dissolving kettle for stirring, add 3.6 tons of mother liquor, take Jiaolong to transport 600kg flake alkali to the alkali dissolving kettle, control the temperature below 60 ℃, and achieve full dissolution within 3 hours. After the solution is cooled and precipitated, drop the mother liquor containing alkali into the reactor.
Mixing process: under the condition of continuous stirring, 33% dimethylamine is pumped into the reactor containing alkali mother liquor at an approximately constant rate, and the temperature is controlled below 25 ℃.
Synthesis process: under the condition of continuous stirring, the prepared carbon disulfide is slowly dropped into the reactor containing the mixture of dimethylamine and alkali mother liquor through the metering tank.
The temperature of this process is controlled below 35 ℃.
After the addition of carbon disulfide, the reactor is stirred for half an hour.
After the reaction is complete, the temperature is reduced to about 20 ℃.
Cooling crystallization process: the synthetic liquid with complete reaction in the reactor is placed in the middle tank for natural cooling crystallization. Centrifugation can be carried out after a large amount of Fumei sodium is crystallized and precipitated.
Centrifugation process: the solid-liquid mixture obtained in the cooling crystallization process is sent to the centrifuge for centrifugation several times, the mother liquor obtained by centrifugation is placed in the mother liquor tank, and the solid Fumei sodium is sent to the silo.
Packaging process: pour the sodium Fumei in the silo into the automatic packaging machine, set the specifications for automatic packaging, and the conveyor belt will send the packaged finished products to the stacker for automatic stacking, which can be stacked for multiple layers, then push out, and finally transport them to the warehouse by forklift for storage.
The waste gas generated in the whole production process is transmitted to different tail gas towers for tail gas treatment according to different types of waste gas.
The role of nitrogen is mainly to maintain the pressure balance of the container and prevent the blockage of the feed inlet.
The above has introduced the main processes of Fumei sodium production. On the basis of understanding the production principle of Fumei sodium, the following focuses on the important equipment links and control strategies of Fumei sodium, so as to pave the way for the specific realization of the following control.