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About UsHebei Longmai Pump Industry Co., Ltd. is a professional manufacturer of industrial water pumps. The company covers an area of 137,500 square meters, employs 219 people, and has a registered capital of 30 million.
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Centrifugal pump cutting and transformation technology achieves energy saving and consumption reduction
2017-08-30
Centrifugal pumps account for the largest number of pumps in various types of pumps and are the main fluid conveying equipment in the petrochemical production process. In the past, designers often left a large design margin when selecting centrifugal pumps. The working principle of a centrifugal pump is to use the impeller to increase the mechanical energy of the fluid flowing through the impeller by the action of centrifugal force, which is used to overcome the mechanical energy loss along the fluid conveying process. The energy-saving and consumption-reducing measures adopted are generally frequency conversion and impeller cutting. However, frequency conversion speed regulation has limitations, large investment, high maintenance cost, and when the centrifugal pump speed is too large, it will cause a decrease in operating efficiency. In contrast, the impeller cutting method
Centrifugal pumps account for the largest number of pumps in various types and are the main fluid conveying equipment in the petrochemical production process. In the past, designers often left a large design margin when selecting centrifugal pumps.
The working principle of a centrifugal pump is to use the impeller to increase the mechanical energy of the fluid flowing through the impeller by the action of centrifugal force, which is used to overcome the mechanical energy loss during fluid transportation. The energy-saving and consumption-reducing measures adopted are generally frequency conversion and impeller cutting. However, frequency conversion speed regulation has limitations, large investment, high maintenance cost, and when the centrifugal pump speed is too high, it will cause a decrease in operating efficiency.
In comparison, the impeller cutting method is simple and convenient to implement, and it is less expensive and quick to see results. It only requires calculating the amount of impeller cutting and then implementing the cutting transformation. After calculating and evaluating the economic rationality, it can be put into implementation.
The technical personnel of Hebei Yutong Pump Industry Co., Ltd. adopted a scheme of changing the pump body structure—cutting the impeller to reduce power and save electricity. After one impeller cut, the impeller diameter of the pump was cut from the original 324 mm to 290 mm, and the head was reduced from 140 m to 112.16 m. After cutting, the power was 79.9 kW, a decrease of 30.1 kW, and the flow rate was 183.3～222.4 cubic meters/hour, meeting the on-site process requirements.
Guided by the successful experience of modifying B-202, the technical personnel further promoted the impeller cutting method and adopted standardized, procedural, and standardized means. A total of 15 centrifugal pumps of this type were modified, saving 10836 kWh of electricity per year.
According to incomplete statistics, before the impeller cutting modification of various centrifugal pumps, the annual power consumption was 8.65 million kWh, and after the modification, the power consumption was reduced to 8.22 million kWh, resulting in an annual economic benefit of 220,000 yuan. This shows that implementing centrifugal pump cutting modification is an important technical means for enterprises to reduce "large horsepower", improve operating efficiency, and reduce energy consumption.
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