Changsha Tianhong Pump Factory: Double Suction Centrifugal Pump Cutting and Rebuilding Technology Saving Energy and Reducing Consumption
Abstract: Double-suction centrifugal pump is a common pump in people's life, and it is also a pump with large annual consumption. It is the main fluid conveying equipment in the petrochemical production process. In the past, when designing double-suction centrifugal pumps , designers often left larger design margins. The principle of double-suction centrifugal pump is that the fluid flowing through the impeller is subjected to the centrifugal force to increase the mechanical energy of the fluid through the impeller. It is used to overcome the loss of mechanical energy along the fluid transport path. The energy-saving and consumption-reduction reform measures adopted are generally frequency conversion and impeller. Cutting. However, there are limitations in frequency conversion speed control, large investment, high maintenance costs, and when the centrifugal pump speed is too large will cause the operating efficiency to decline. In contrast, the impeller cutting method is simple and convenient to implement, and it is small in cost and quick in effect. It is only necessary to calculate the cutting amount of the pump impeller and carry out cutting transformation. After calculation and evaluation of economic rationality, it can be put into implementation.
Keywords: double-suction centrifugal pump, cutting transformation, pump energy saving, Changsha Pump Factory
The technicians took a plan to change the structure of the pump body, cutting the impeller and reducing the power to save energy. After a single cut of the impeller, the diameter of the impeller of the pump was cut from the original 324 mm to 290 mm, and the head was reduced from 140 to 112.16 meters. The power after cutting was 79.9 kW, the power was reduced by 30.1 kW, and the flow was 183.3 to 222.4 cubic meters. /, meet the on-site process requirements.
Under the guidance of successful experience in the transformation of B-202, technicians further promoted the method of impeller cutting and adopted standardized, procedurally, and standardized methods. A total of 15 units of this type of centrifugal pump were retrofitted, saving 10,836 kWh annually.
According to incomplete statistics, the power consumption of 8.65 million kwh per year before the implementation of cutting and transformation of various double-suction centrifugal pumps has been reduced to 8.22 million kwh, and an annual economic benefit of 220,000 yuan can be achieved. From this it can be seen that the implementation of centrifugal pump cutting and transformation is an important technical measure for enterprises to reduce the “malaysia”, increase operational efficiency, and reduce energy consumption.
