vacuum pump system in deodorization of oil refining

With the gradual improvement of environmental protection requirements of various industries and the development of industry to new industrialization, the application fields of edible animal fat related products are expanding, and the requirements for machinery and equipment applicable to the oil industry are becoming more and more strict. Steam consumption accounts for about 80% of the power cost in the process of oil refining. With the increasingly fierce competition in the domestic oil market, energy saving and consumption reduction, especially steam consumption, in the oil refining workshop has become the technical key to reduce the cost of oil enterprises. The purpose of this paper is to compare the traditional process of oil industry with the vacuum system suitable for oil industry, what is the difference between them, and which is better.

Comparison of traditional process and vacuum system for oil industry

During the production and operation of the deodorization section of oil refining, it is necessary to maintain high vacuum and extract a large amount of condensable gas and a small amount of non condensable gas. The traditional process is mainly completed by a vacuum system composed of multi-stage steam jet pump and condenser. The system is generally installed at a height of more than 10 m, occupying a large space and consuming a lot of steam and water.

The new vacuum system is composed of multi nozzle multi diffuser and jet mixing condenser, which only accounts for 10% of the total process building area in installation; in terms of energy consumption, the consumption of steam and water is only about 25%, which greatly saves the plant construction investment and the production cost of oil refining. The system has been successfully applied in the chemical industry.

There are three types of vacuum pump systems:

1. Low vacuum system

2. Medium vacuum system

① The system is composed of roots pump and mechanical pump in series;

② The system consists of an oil booster pump and a mechanical pump in series;

③ The system is composed of roots pump in series with small roots pump and mechanical pump in series.

3. High vacuum system

① The system consists of diffusion pump, roots pump and mechanical pump in series;

② The vacuum system is composed of diffusion pump and mechanical pump in series;

③ The vacuum system is composed of diffusion pump, oil booster pump and mechanical pump in series.

Vacuum pump system working principle:

The main vacuum pump group of the starting system starts to work until the vacuum degree in the vacuum tank reaches the set upper limit value, the vacuum pump automatically stops running, and the vacuum in the central vacuum system is maintained by the automatic cut-off of the vacuum check valve on the pipeline. If the vacuum degree in the vacuum tank drops and is lower than the set lower limit value due to work demand, the standby vacuum pump set will start automatically. Thus, the vacuum degree of the vacuum system can maintain a stable vacuum source and meet the requirements of production.

To sum up, compared with the traditional four or five stage steam jet pump, the new vacuum system has the following advantages: stable performance and strong reliability; high efficiency and energy saving; obvious reduction of steam and water consumption; low noise, less waste water production and more friendly environment; by introducing the vacuum technology and products, the production cost and operation cost of the oil industry are greatly reduced To promote the technological progress of China’s oil processing industry.

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