Chemical pumps are the most used rotating equipment in petrochemical production plants. They transport various liquid media such as crude oil, refined oil, chemical raw materials, intermediate products and finished products to other places like the human heart transports blood.

my country's petrochemical industry will have a great development during the "Tenth Five-Year Plan" period, and the production technology and scale will be on par with the international level. The two major groups, Sinopec and PetroChina, invest nearly 100 billion yuan each year, and the demand for petrochemical equipment will be huge. of.

According to statistics, a medium-sized oil refinery has more than 1,000 pumps, of which centrifugal pumps account for 83%, reciprocating pumps account for 6%, gear pumps account for 3%, and the rest are screw pumps and vacuum pumps. A petrochemical plant has more than 2,000 pumps, of which centrifugal pumps account for 45%, gear pumps account for 23%, reciprocating pumps and screw pumps account for 12% each, and canned pumps account for 6%. These pumps are generally driven by electric motors.

The pressure of the medium conveyed by petrochemical pumps ranges from negative pressure to 300MPa, and the temperature ranges from minus 140°C to nearly 500°C above zero. Some media are viscous, some contain solid particles, and most of the transported media are corrosive. Petrochemical pumps are the most energy-consuming equipment, and the power consumption of pumps accounts for about 50% of the power consumption of the whole plant.

Petrochemical pumps are the most frequently used rotating equipment in petrochemical production, and their performance, quality, and service life will have a great impact on petrochemical production and construction. The domestic pump industry should speed up the pace of reform, aim at this largest market, adjust product structure, and improve technology and management level. First of all, it is necessary to improve the standardization, serialization and generalization of products.

At present, the materials of corrosion-resistant pumps are still a large number of ferrous materials and high-nickel alloy materials. In the future, it is required to use more excellent corrosion-resistant materials such as titanium, zirconium, and tantalum, and to develop non-metallic materials such as ceramics, glass fiber reinforced plastics, and graphite. .

With the continuous development of petrochemical industry technology and scale, the requirements for petrochemical pumps are getting higher and higher. In addition to continuing to improve the quality of conventional pumps and expand specifications and varieties, especially the demand for pumps conveying corrosive materials is increasing, such as ethylene cracking units, polyethylene units and polypropylene units in ethylene production; PTA device (purified terephthalic acid), polyester device and polyester spinning device, acrylonitrile and grease supply device, etc. Therefore, efforts should be made to develop the technology of corrosion-resistant pumps.