Because of its variable delivery, self absorption capacity, can be reversed, can transport the liquid containing solid particles and so on, in the sewage treatment plant, widely used in the transport of water, wet sludge and flocculant liquid. Screw pump selection should follow the principle of economic, reasonable and reliable. If inconsiderate in design, would later use, management, maintenance, trouble, so choose one according to the actual needs of production, reasonable and reliable to ensure smooth production, and can reduce the cost of repairs.
1. The speed of sludge pump selection :
Sludge pump linear flow and speed, relative to the low speed of the screw pump, high speed can increase the flow and head, but significantly increased power, high speed accelerated between the rotor and the stator wear, premature failure will make screw pump, and high speed screw pump rotor length is very short. Easy to wear, and thus shorten the life of the screw pump sludge.
Through the reduction mechanism or stepless speed regulation mechanism to reduce the speed, so that the speed is kept at every point
Three hundred to the following more reasonable range, compared with the high-speed operation of the sludge screw pump, the service life can be extended several times.
2. The quality of sludge pump :
Now many kinds of screw pump on the market in relation to the design of sludge imports of screw, material well, but the price is high, and some are not in place, accessories high price, order cycle length, may affect the normal operation of production. Most of the domestic production of generic imported products, product quality is uneven in quality, in the selection of domestically produced product, when considering its cost, use low speed, long lead, drive component material, rated long life products as well.
3. To ensure that the debris does not enter the pump body sludge pump :
Wet sludge mixed with the solid debris will rubber material damage to the stator of the screw pump, so to ensure that debris does not enter the pump chamber is very important, many wastewater treatment plant before the installation of a grinder pump, and some install grid device or filter, blocking debris into the grid, to be cleared in time to avoid clogging fishing.
4. Avoid breaking material :
The sludge pump must not be allowed to operate in cutting conditions, the occurrence of rubber stator due to dry friction, instant high heat and burn out, so the grinder intact, is one of the necessary conditions of grille unimpeded, normal operation of the screw pump for some screw pump is installed on the pump body end feeding stop device, when cutting, due to its characteristics of screw pump self-priming function, will produce a vacuum chamber, a vacuum device causes the screw pump to stop running.
5. Maintain a constant outlet pressure :
Is a volume type rotary pump, when the export side blocked, the pressure will gradually increase, so that more than a predetermined value of the pressure. At this time the motor load increased dramatically. Transmission machinery related parts of the load will exceed the design value, will be serious when the motor burned, transmission parts. In order to avoid damage to the screw pump, the general will be installed at the outlet of the screw pump bypass relief valve, used to stabilize the outlet pressure, to maintain the normal operation of the pump.
