The design of the waste liquid pump station used in combustion system
should be based on the process flow and system requirements, we will consider from five aspects: waste liquid properties, waste liquid throughput, device pressure, pipeline layout and operating conditions.
Waste liquid properties: including physical properties and chemical properties for liquid medium. Physical properties include temperature, density, viscosity, solid particle diameter and gas content etc., which affects the system pressure and the required dynamic calculation; Chemical properties mainly refer to the chemical corrosion and toxicity of the liquid medium, which is important for the selection of pump materials and shaft seal type.
The flow rate is directly related to the production capacity and conveying capacity of the whole device. Cycloid gear pump selection should be base both on the maximum flow and the normal flow. If no maximum flow, usually take 1.1 times the normal flow as the maximum flow. The leakage of pipeline system can be ignored in the process flow of general industrial pumps, but must consider the influence of process change on flow.
The pressure of the device is another important performance data of the gear pump. Generally, the type of cycloid gear pump should be selected by amplifying the pressure of 5%-10%.This includes: suction tank pressure, drain tank pressure, the pressure drop in the piping system (pressure loss).
The layout condition of the oil pump pipeline refers to the height, distance and trend of liquid delivery, as to calculate the system pressure and check the power. If necessary by pipe system data, should also draw device characteristics curve.
Operating conditions refer to the operating temperature of the liquid, suction side pressure, discharge side container pressure, altitude, environmental temperature, operation is intermittent or continuous, gear pump position is fixed or movable.
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