Roots vacuum pump unit in petroleum distillation

According to the performance and characteristics of Roots vacuum unit, the economic benefits obtained by replacing steam jet vacuum pump in petroleum vacuum distillation unit are summarized. It has many functions, but it is not very well known.

Almost all the vacuum distillation units in domestic refineries are used to use the traditional steam injection vacuum pump as the main means of evacuation. Although the steam injection vacuum pump is simple in structure, small in maintenance and reliable in operation, it consumes a lot of water vapor and cooling water, but the obtained vacuum degree is low, so that the crude oil can not be deep-dialed, and the oil recovery rate is low. In addition, because a large number of condensate water and oil vapor condensate liquid mixing, which is a waste of oil and serious environmental pollution. In other countries, the so-called "dry distillation" is used in the distillation unit of refineries. In addition to upgrading the original vacuum tower.

The roots vacuum pump unit mainly selects and redesigns the evacuation equipment. Back-cooled Roots vacuum pump is used as the main pumping pump in the United States to overcome the heating of Roots vacuum pump under high pressure. The front stage vacuum pump chooses two-stage water-ring vacuum pump to form the pumping unit, and also needs a cold source to maintain the long-term operation of the unit. Therefore, the design structure is more complex and the cost is more expensive.