Screw pump application process and the use of heavy oil in the selection

Screw pump application process and the use of heavy oil in the selection of screw pump because of its variable delivery, self-priming ability, reversible, capable of conveying liquids containing solid particles and other characteristics of sewage treatment plants, is widely used in the transport of water , Wet sludge and flocculant liquid. Screw pump selection should follow the economic, reasonable and reliable principles. If the design selection of ill-considered, will give the future use, management, maintenance trouble, so choose a production according to actual needs, reasonable and reliable screw pump can ensure the smooth production, colloid mill and can reduce the repair Cost A screw pump speed selection Screw pump flow and speed into a linear relationship, relative to the low-speed screw pump, high-speed screw pump can increase the flow and lift, but the power was significantly increased, high speed accelerated the rotor And the stator wear, the screw will inevitably lead to failure, and high-speed screw rotor stator length is very short, easy to wear, thus shortening the life of the screw pump. Submersible pump through the speed reducer or stepless speed regulating mechanism to reduce the speed, the speed maintained at a reasonable range of three hundred revolutions per minute, and high-speed operation of the screw pump, the service life can be extended several times Second, the screw The quality of the pump I produced more types of screw pump, screw pump design, excellent material Third, to ensure that debris does not enter the pump Wet sludge mixed with solid impurities will cause damage to the screw pump rubber material stator, So it is very important to ensure that the sundries do not enter the cavity of the pump. Many sewage plants have installed grinder in front of the pump, and some also install grille devices or filters to block the sundries from entering the screw pump. Fishing so as to avoid clogging Fourth, to avoid broken screw pump Never run in the case of broken material, once occurred, the rubber stator due to dry friction, instantaneous heat generated and burned, so the grinder intact grille smooth is the screw pump One of the necessary conditions for normal operation, for this reason, some screw pump is still installed in the pump body off material shutdown device, when there is a broken material, due to the self-priming screw pump features The cavity will have a vacuum, the vacuum device will stop the operation of the screw pump Five, to maintain a constant outlet pressure Screw pump is a positive displacement pump, when the outlet is blocked, the pressure will gradually increase, so that more than the predetermined pressure value . At this time the motor load increased dramatically. Transmission machinery related parts load will exceed the design value, severe motor burn occurs, the transmission parts broken. In order to avoid damage to the screw pump, generally installed at the outlet of the screw pump bypass relief valve to stabilize the outlet pressure to maintain the normal operation of the pump

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