The slurry pump belongs to the centrifugal pump, which is divided from the working principle of the pump. The slurry pump achieves the process of conveying the medium and pressurizing through the action of centrifugal force. In addition, there are common types including screw principle, plunger principle, etc. which can be divided into pumps that are different from the centrifugal principle. After talking about the centrifugal pump concept, let's talk about the slurry pump. The slurry pump divides the pump from another angle, that is, it is divided from the conveying medium. As the name suggests, the slurry pump transports a mixture of solid particles containing scum and water. But in principle, the slurry pump is a kind of centrifugal pump. In this way, these two concepts are made clear.

　　 The main working parts of a centrifugal pump are the impeller and the casing. The impeller device in the casing is located on the shaft and connected with the prime mover to form a whole. When the prime mover drives the impeller to rotate, the blades in the impeller force the fluid to rotate, that is, the blades do work on the fluid along its moving direction, thereby forcing the pressure potential and kinetic energy of the fluid to increase. At the same time, the fluid flows from the center to the edge of the impeller under the action of inertial force, and flows out of the impeller at a high speed, enters the extruding chamber, and then is discharged through the diffuser. This process is called the pressurized water process. At the same time, because the fluid in the center of the impeller flows to the edge, a low pressure area is formed in the center of the impeller. When it has enough vacuum, under the action of the suction end pressure (generally atmospheric pressure), the fluid enters the impeller through the suction chamber. This process is called Water absorption process. Due to the continuous rotation of the impeller, the fluid is continuously discharged and sucked in to form continuous work.

　　 The working process of centrifugal pumps (including slurry pumps) is actually a process of energy transfer and conversion. It transfers the mechanical energy of the motor at high speed through the pump blades and converts it into the pressure energy and kinetic energy of the pumped fluid.

　　 Before the submerged slurry pump is shipped, the inlet valve of the pump should be opened and the outlet valve of the pump closed. Then start the pump and slowly open the pump outlet valve after the pump is started. The size and speed of the pump outlet valve opening should be controlled by the pump not vibrating and the motor not exceeding the rated current.

　　 The pump is started in series, and the above method is also followed. After the first-stage pump is turned on, the outlet valve of the last-stage pump can be opened a little (the opening size should be 1/4 of the rated current of the first-stage pump motor current), and then the second-stage and third-stage can be started successively until the last-stage pump. After the tandem pumps are all started, the outlet valve of the final pump can be opened gradually. The valve opening speed should be controlled by the pump does not vibrate and the motor of any pump does not exceed the rated current.

The submerged slurry pump is mainly for conveying flow. It is best to install a flow meter (meter) in the operation monitoring system to monitor whether the flow meets the requirements at any time; it is equipped with a cyclone piping system, a slag washing system, and a filter press dehydration The system also requires a certain pressure at the outlet of the pipeline. A pressure gauge should also be installed in this system to monitor whether the pressure meets the requirements.

　　 In addition to monitoring the flow and pressure during the operation of the submerged slurry pump, it is also necessary to monitor the motor not to exceed the rated current of the motor. At any time, monitor whether the oil seals, bearings, etc. are causing abnormal phenomena, whether the pump is evacuated or overflowing, etc., and deal with them at any time.