Why is the anti clogging performance of sewage pumps increasingly valued? This is mainly due to two reasons: firstly, the increase in sewage disposal costs. Industrial enterprises are striving to reduce the water consumption per unit of product production, which leads to an increasing content of solid substances and fibers in wastewater. Secondly, sewage pumps are increasingly using energy-saving methods, such as speed regulation as a driving method, while speed regulation cannot guarantee that the sewage pump will not become clogged.
In response to the problem of frequent blockage of pump impellers by impurities, the method of cleaning every blockage must be adopted in the initial stage of equipment operation, and the blockage should not be cleared overnight. Although this avoids downtime, frequent disassembly of the pump body results in increased wear and tear on components such as the pump mouth ring, and each time the blockage is cleared, it requires a lot of manpower. To change this situation, a carbon steel anti fouling box is installed at the inlet pipe of the pump, with a diameter of 45. Tilt angle. Use a filter screen inside the box to filter impurities again to avoid blockage. The team conducts 1-3 cleaning operations on the obstruction of pollution every month.
After the implementation of this plan, certain results have been achieved, and labor consumption has been alleviated. There is a vent valve at the bottom of the trash box, but there are still dead corners. After some sewage and impurities accumulate in dead corners, they can easily cause slight gas poisoning injuries to personnel during cleaning, which is not conducive to safe operation. The shape of the rotor blades of sewage pumps can be divided into two types, namely swirling blades and cutting blades, which are widely used. The swirl impeller does not move in the conveyed medium. According to the principle of fluid dynamics, the medium to be pumped is guided into the pump chamber, and the pumped medium flows through the impeller. In this way, the long fibers or solid substances in the pumped liquid medium are also pumped out together. And the cutting type blade can cut large solid blocks into small pieces, thus no longer clogging.
Ensure the safe operation of critical equipment
The catalyst metering pump is mainly used for injecting catalyst, promoting the condensation reaction of oligomers in the pre condensation and final condensation reactors. The polyester process requires that the catalyst must be injected in a certain proportion, and the shutdown time cannot exceed 15 days. Otherwise, it will reduce the viscosity of the melt and lower the quality of the product. To ensure the smooth operation of the catalyst pump, some assurance measures must be taken.
Regularly replace lubricating oil and wear parts
The main internal moving parts of the catalyst metering pump include worm, worm gear, slider, new piston, etc. The wear and tear of these components will directly lead to a decrease in pump flow or no increase in quantity at all. The current solution is to regularly replace lubricating oil, wear parts, and clean the hydraulic chamber regularly.
Strict operating procedures for catalyst metering pumps
The start and stop of the catalyst metering pump should be strictly operated in accordance with the usage requirements. At startup, start the pump with zero output, and only when there is a certain pressure at the pump outlet can nitrogen be charged to the pressure regulating plate. To avoid significant deformation of the diaphragm caused by nitrogen filling and prevent diaphragm rupture; When increasing pump output, proceed slowly; When stopping the pump, the output of the pump should also be slowly reduced.
Strengthen pump maintenance
The pump is regularly inspected during operation, with a focus on checking the lubricating oil level, pump sound, outlet pressure, nitrogen buffer tank pressure, etc. Regularly replace the pump body diaphragm and nitrogen buffer tank diaphragm to effectively prevent the occurrence of catalyst injection stoppage accidents caused by simultaneous damage to both pumps.
