Why is the anti clogging performance of sewage pumps becoming more and more important? This mainly stems from two reasons: first, the cost of sewage treatment increased. Industrial enterprises are trying to reduce the amount of water consumed per unit of production, which increases the amount of solid matter and fiber in the sewage. Two is the sewage pump, more and more use of energy saving means, that is, speed regulation drive mode, and speed regulation can't guarantee sewage pump will not block.
Aiming at the frequent plugging machine impurity pump impeller, the initial operation of the equipment used by each block will clear, not overnight cleaning method. Although this avoids downtime, the pump body is often removed, resulting in increased wear and tear on the pump, pump, ring and other components. To change this situation, a carbon steel dirt box is installed at the pump inlet of the pump and is 45. Dip angle。 A filter screen is used in the box to filter the impurities again to avoid clogging. The team will clean up the sewage every month for 1~3 times.
After the implementation of this program has received some results, manpower consumption has been eased. There is a vent valve at the bottom of the dirt box, but there is still a dead angle. After the accumulation of partial waste water and impurities in the dead corner, it is easy to cause minor gas poisoning damage in the cleaning, which is not conducive to safe operation.
The shape of the rotor blades of sewage pumps is divided into two kinds, namely, swirling blades and cutting blades. These two types of blades are the most widely used. The swirl impeller is not moving in the medium to be conveyed. According to the principle of fluid dynamics, the medium to be pumped is guided into the pump chamber and the pump medium flows through the impeller. In this way, the long fiber or solid material pumped in the liquid medium is also pumped together. The cutting blade, which can block larger solid matter, is no longer plugged.
Ensure safe operation of key equipment
The catalyst metering pump is mainly used for injection of catalyst, which results in polycondensation reaction of oligomer in pre polycondensation reactor and final polycondensation reactor. The polyester process requires that the catalyst be injected at a certain rate, and the stopping time shall not exceed 15rain. Otherwise it will cause the decrease of viscosity, product quality etc.. In order to ensure the smooth operation of catalyst pump, some guarantee measures must be taken.
Replace lubricant and wear parts regularly
The main movement parts of the catalyst metering pump include worm, worm gear, slider, fixed piston, etc.. The wear and tear of these components will directly lead to lower or lower pump flow. The solution is to replace lubricating oil, wear parts and clean the hydraulic chamber regularly.
Operating procedures for strict catalyst metering pumps
The start-up and shutdown of the catalyst metering pump shall be operated in strict accordance with the operating requirements. At start time, zero output pump is used, and the pressure regulating plate is charged with nitrogen when the pump outlet has a certain pressure. Avoid due to nitrogen caused by membrane deformation larger, prevent diaphragm rupture; improve pump output, to slow; stop the pump, should also slow down the pump output.
Strengthen pump maintenance
During the operation of the pump, regular inspection, focusing on lubricating oil level, pump sound, export pressure, nitrogen buffer tank pressure, etc.. Periodically replace the pump body diaphragm and nitrogen buffer tank to prevent the damage of two pumps at the same time, and cause the catalyst shutdown accident