Operation Essentials Of Submersible Slurry Pumps

　　Operational tips of under-liquid slurry pump　　The under-liquid slurry pump has the characteristics of energy saving, low vibration, low noise, reliable operation, long service life and convenient maintenance.Pump body pump cover and overflow components: It is a type of under-liquid pump, and the pump housing is a double-layer housing structure.The outer layer is a metal pump housing (front pump housing, rear pump housing), and its material is usually HT200 or QT500. The inner shell can be made of high chrome alloy cast iron (including sheath, front guard plate, rear guard plate), or made of rubber (including front jacket and rear jacket).The bearing is lubricated with grease.Depending on the liquid level of the slurry pool, pump drive shafts or suction pipes of different lengths can be selected.When the pool water depth is high, a custom extended shaft can be used.No shaft seal or shaft seal water is required, and it can work normally even when the suction volume is insufficient.This series of slurry pumps are mainly used to treat corrosive slurries containing solid particles.The weight concentration of the slurry processed in this series of pumps is: 50% mortar and 60% slurry.Under-liquid slurry pump is a new generation of energy-saving single-stage, single-sucking, vertical centrifugal slurry pumps that are mainly suitable for the processing of corrosive slurry containing solid particles in industrial industries such as electricity, metallurgy, coal, building materials, and chemical industry.Although the sub-liquid slurry pump is widely used, it is very important to use it correctly.Due to the limitations of the name of the under-liquid slurry pump, some people who are not in the industry have misunderstood this. During the application process, you must pay attention to reasonable design, correct calculation, and appropriate selection. These points are very important.1. Before departure, the pump inlet valve should be opened and the pump outlet valve should be closed.Then start the pump, and then slowly start the pump outlet valve after the pump is started. The size and speed of the pump outlet valve should be controlled by the fact that the pump does not vibrate and the motor does not exceed the rated current.2. Start with a pump in series, and follow the above methods.After opening the first-stage pump, you can open the outlet valve of the last-stage pump a little (the opening size is 1/4 of the rated current of the first-stage pump motor), and then start the second-stage three-stage pump one after another. After all the series pumps are started, you can gradually open the outlet valve of the large last-stage pump. The speed of the valve opening should be controlled by the fact that the pump does not vibrate and the motor of any one-stage pump is not exceeding the rated current.3. The under-liquid slurry pump mainly aims at conveying flow. The operation monitoring system is equipped with a flow meter (meter) to monitor whether the flow meets the requirements at any time; it is also required that there is a certain pressure at the pipeline outlet in the cyclone pipeline system, slag flushing system, and filter pressing and dewatering system.This system should also be equipped with a pressure gauge to monitor whether the pressure meets the requirements.4. In addition to monitoring the flow and pressure during operation, the motor must also be monitored not to exceed the motor's rated current.Monitor whether oil seals, bearings, etc. are conducting normal conduction, whether pumps are evacuated or overflowed, etc., and deal with them at any time.5. The pump has a liquid depth of 2000mm. The pump is connected to the motor through an elastic coupling. From the direction of the prime mover, the slurry pump under the liquid rotates clockwise.