In water treatment equipment, the use of water pumps is indispensable. The correct selection of water pumps directly affects the operation of the equipment. Generally speakingThe selection of water pumps should be based on the process flow and water supply and drainage requirementsConsider it. Now let's talk about itFactors to be considered when selecting a water pump7a"Factor.

1,Equipment operating environment

Including equipmentBased on the layout, terrain conditions, water level conditions and operating conditions, determine the selection of horizontal, vertical and other types (pipeline type, submersible type, submerged type, non-clogging type, self-priming type, gear type, etc.) pumps.

2,"Traffic"

"Traffic"It is one of the important performance data for selecting a water pump, which is directly related to the production capacity and conveying capacity of the entire device. Based on the flow rate, determine whether to select a single suction pump or a double suction pump. Depending on the head, choose a single-stage pump or a multi-stage pump, a high-speed pump or a low-speed pump (air conditioning pump). The efficiency of a multi-stage pump is lower than that of a single-stage pump.In the process design, normal, small and large flow rates of the pump can be calculated. When choosing a pump, the large flow rate should be the basis, while taking into account the normal flow rate. When there is no large flow rate, a pump with a normal flow rate is usually selected1.1Double as a large volume of traffic.

3,Head

Equipment InstituteThe required head is another important performance data for pump selection. Depending on the head level, choose a single-stage pump or a multi-stage pump, a high-speed pump or a low-speed pump (air conditioning pump). The efficiency of a multi-stage pump is lower than that of a single-stage pump, and generally, an amplification is needed5%-10%Select the type based on the head after the margin.

4,Properties of liquids

Based on the nature of the liquid medium, determine whether to use a clean water pump, a hot water pump, an oil pump, a chemical pump, a corrosion-resistant pump or a impurity pump, or adopt a non-clogging pump. Pumps installed in explosion areas should be equipped with corresponding explosion-proof motors according to the grade of the explosion area.Meanwhile, pay attentionIt includes the name of the liquid medium, physical properties, chemical properties and other properties. Physical properties include temperature, density, viscosity, the diameter of solid particles in the medium and the content of gas, etc. This involves the system's head, effective net positive suction head calculation and the appropriate type of pump Chemical properties, mainly referring to the chemical corrosiveness and toxicity of liquid media, are important bases for selecting pump materials and choosing the type of shaft seal.    

5,The pipeline layout conditions of the device system

It refers to some data such as the liquid delivery height, distance and direction, the low liquid level on the suction side and the high liquid level on the discharge side, as well as the specifications and lengths, materials, specifications and quantities of pipe fittings of the pipeline, so as to conduct the calculation of the system head and the verification of the net positive suction head.

6,Determine the number of pumps and the standby rate

For a normally operating pump, generally only one is used because a large pump is equivalent to two small pumps working in parallel (referring to the same head and flow rate), and the efficiency of a large pump is higher than that of a small one. Therefore, from an energy-saving perspective, it is better to choose one large pump rather than two small ones. However, in the following situations, two pumps can be considered for parallel cooperation: the flow rate is very large and one pump cannot reach this flow rate. For the need to have50%The standby rate of the large pump can be changed to two smaller pumps for operation, with two being on standby (a total of three).;For some large pumps, this option can be selected70%Pumps with flow requirements operate in parallel without a backup pump. When one pump is under maintenance, the other pump still takes on the responsibility In production70%"Conveying";"Need24For pumps that operate continuously for hours, three pumps should be kept on standby, with one in operation, one on standby and one under maintenance.

7,The content of the operating conditions

Such as the saturated vapor force of the liquid operation, the pressure on the suction side, the pressure of the container on the discharge side, altitude, ambient temperature, whether the operation is intermittent or continuous, and whether the position of the pump is fixed or movable.

The above isFactors to be considered when selecting a water pump7aIf you encounter any problems in the selection of water pumps, please consult Beijing Yuanlai Water Treatment Equipment Co., LTD., the first-level agent of Southern Pumps, specializing in the water treatment industry15In this year, you can trust us!