Application of rotary vane vacuum pump in petrochemical enterprises. With the improvement of the quality requirements of various industries, the defects of products will be enlarged and the tolerance will be lower and lower. This is especially true for pharmaceutical products. Therefore, in vacuum distillation, in order to improve the distillation efficiency and improve the quality of distillation products, more and more pharmaceutical enterprises no longer pay attention to pumping speed and vacuum degree, but also pay attention to the improvement of product quality by clean vacuum. At present, more and more enterprises prefer to choose rotary vane vacuum pump in the process of vacuum distillation special vacuum pump, from chemical enterprises to various pharmaceutical enterprises.
Vacuum distillation (also known as vacuum distillation) is an important method for separation and purification of compounds, especially for the separation and purification of high boiling point substances and those compounds which have been decomposed, oxidized or polymerized before reaching the boiling point in atmospheric distillation. Vacuum distillation is a vacuum process often used in the production of various chemical pharmaceutical and petrochemical enterprises.
What is the role of rotary vane vacuum pump in petrochemical enterprises?
The working range of rotary vane vacuum pump is from atmospheric pressure to about 1pA limit vacuum. It has a wide pumping speed range. Single pump with low vacuum can realize high pumping speed. The structure is simple and reliable, and the maintenance and operation is convenient. On the other hand, the inherent cleaning characteristics of rotary vane vacuum pump do not need other media to participate in the extraction process, and do not worry about backflow pollution media. Moreover, it can be combined with roots and other dry vacuum unit products with high vacuum degree and high pumping speed. In the fields of food, fine chemical industry, pharmaceutical semiconductor, etc., which have strong demand for clean vacuum and various recycling fields, these characteristics can effectively improve the production efficiency of enterprises, greatly simplify the operation process of vacuum system and various supporting links, and improve product quality, so they are favored by enterprises.
Notes for vacuum distillation:
1. When there are low boiling point substances in the distillate, atmospheric distillation should be carried out first, and then the low boiling point substances should be evaporated by vacuum pump. Finally, vacuum pump was used for vacuum distillation.
2. According to the different boiling points of compounds, choose the appropriate heating method. Can not be directly heated by open fire, usually choose water bath or oil bath, the general requirement is to heat evenly, try to avoid local overheating. Control the bath temperature to keep 20 ℃ – 30 ℃ higher than the boiling point of liquid.
3. When distilling substances with high boiling point, it is better to wrap the two necks of Kirschner distillation head with asbestos rope or asbestos cloth to reduce heat dissipation.
Pay special attention to the direction of vacuum rotation. If the connection position of the vacuum pump is wrong, the vacuum pump will rotate in reverse, causing mercury to rush out of the pressure gauge and cause pollution.
5. When the distillation is finished or needs to be interrupted during the distillation process (such as changing the capillary tube and receiving bottle), the fire source should be extinguished first, the hot bath should be removed, and the vacuum should be slowly relieved after it is slightly cold, so that the internal and external pressure of the system can be balanced before the oil pump can be turned off. Otherwise, due to the low pressure in the system, the oil in the oil pump will be sucked into the absorption tower.
At present, the vacuum pump products have been deployed in the vacuum distillation production. The application of rotary vane vacuum pump in petrochemical enterprises is also equipped with a new process production line.
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