Vacuum pump is widely used in industrial production, so how to choose and use vacuum pump correctly is very important. This paper introduces the application of the vacuum pump of the down rotating plate in the chemical distillation. Distillation is one of the most important methods in the separation of liquid mixtures, which has been widely used in various chemical production, such as petroleum refining, petrochemical, coking chemical, basic organic synthesis and so on.
Chemical distillation is the operation of separating the components of liquid mixture into pure components according to the different volatility of each component, which is used for the purification and recovery of products or the purification of raw materials. Because the kettle is often filled with toxic and harmful dangerous chemicals, the fire and explosion are more dangerous and hazardous in the distillation process. The leakage, fire and explosion accidents of reaction kettle and distillation kettle also happen frequently, and the accident consequences are more serious than the general explosion accidents. Therefore, in the chemical distillation process must be strictly standardized operation.
In the process of chemical distillation, the organic solvent with flammability is often separated from the solution. In the process of heating and generating steam, once the gas flammable substance leaks, it will mix with the air to form a flammable and explosive gas mixture. In the process of gas spraying out, electrostatic discharge will be generated to detonate the gas mixture. The explosion energy and heat source can cause the burning of substances in the distillation unit and Explosion, leading to secondary disasters.
First of all, here are some notes on using the rotary vane vacuum pump:
1. What is the required vacuum degree and pumping speed in the vacuum distillation process.
2. Whether the extracted gas is flammable, explosive and other hazards.
3. Whether the extracted gas is corrosive.
4. Pipeline connection of the extracted gas.
5. Whether the extracted gas contains condensable gas such as water vapor.
Distillation is a unit operation of separating liquid mixture by using the difference of volatility of each component in liquid mixture. The distillation process can be classified according to distillation mode, continuity, and component fraction. Chemical distillation is the operation of separating the components of liquid mixture into pure components according to the different volatility of each component, which is used for the purification and recovery of products or the purification of raw materials.
Vacuum distillation is an important process in pharmaceutical and chemical industries, and it is also widely used in other industries, including beverage and food production. In addition, it is also used for refining crude oil: crude oil contains heavy hydrocarbon and light hydrocarbon with different boiling points, so two distillation processes are needed. First, atmospheric distillation is adopted, then secondary distillation is carried out through vacuum, and heavy hydrocarbon is separated at low temperature, so as to minimize thermal cracking and unnecessary by-product generation.
The rotary vane vacuum pump provided by our company is a corrosion-free vacuum equipment and an ideal choice for distillation process. In order to deal with flammable steam, gas and liquid, we also provide dry screw vacuum pump products. The two-stage rotary vane vacuum pump adopts primary oil lubrication, and its design is simple and mature. Only a small amount of working fluid is required for the cylinder, and it is allowed to use working fluid compatible with the process. Compared with the vacuum system, the application of rotary vane vacuum pump in chemical distillation has the advantages of cleanness, high working vacuum, stable pumping speed, easy maintenance, etc. with roots vacuum pump, it can establish a lower front pressure, and quickly pump out the gas discharged from the main pump in the later stage, which has a good tolerance for particles and condensable gas, and realizes a better production vacuum environment.