Slurry pump are widely used in mining projects,there are Some useful information about slurry pumps efficiency you must to know。
Brief introduction
1. Slurry ump efficiency diagram
2. Three aspects of energy loss in the slurry pump
3. Analysis of slurry pump efficiency formula
4. General methods to improve slurry pump efficiency
5. Other factors affecting slurry pump efficiency and Solutions
1：Pump efficiency diagram:
2： Three aspects of energy loss in slurry pump
DEPUMP slurry pump is a kind of energy conversion machine, the energy conversion process must be accompanied by the loss of energy, and efficiency is the measure of this conversion.
How to improve the efficiency of the pump and reduce the loss of energy?
It is necessary to find out the loss of energy in the pump.
The energy loss in the pump mainly includes the following three aspects:
(1): Mechanical loss
(2): Volume loss
(3): Hydraulic loss
3: Analysis of pump efficiency formula
What is the efficiency of a pump? And the formula?
Answer: it refers to the ratio of effective power and shaft power of the pump.
η = power of PE / P pump generally refers to the input power, that is, the power transmitted from the prime mover to the pump shaft, so it is also called shaft power, which is represented by P.
The effective power is the product of the lift, mass flow and acceleration of gravity.
PE = ρ g QH (W) or PE = γ QH / 1000 (kw)
ρ: Density of liquid delivered by pump (kg / m3)
γ: Gravity of pump liquid γ = ρ g (n / m3)
g: Acceleration of gravity (M / s)
Mass flow QM = ρ Q (T / h or kg / s)
4：General methods to improve pump efficiency
Improve pipeline system and reduce resistance.
The length of the pipeline shall be shortened and kept as straight as possible, and the flow rate shall be reduced to reduce the head loss along the pipeline; the number of gate valve, bottom valve, elbow, orifice plate and other components shall be reduced to reduce the local head loss. Reduce the surplus of water pump outlet pressure to meet the requirements of pipeline system for outlet pressure.
Pump is the most widely used general-purpose machinery, but also a large consumer of electricity and energy, so improving the efficiency of the pump itself and the use efficiency of the pump plays an important role in energy conservation.Improve the efficiency of the pump.
5： Other factors affecting the efficiency of pump and Solutions
（1）： The efficiency of the pump itself is the most fundamental effect. Under the same working conditions, the efficiency of the pump may differ by more than 15%.
（2）： The operation condition of the centrifugal pump is lower than the rated condition of the pump, with low pump efficiency and high energy consumption.
（3）： The efficiency of the motor is basically unchanged in use. Therefore, it is important to select a high efficiency motor to turn off.
（4）： The influence of mechanical efficiency is mainly related to design and manufacturing quality. After the pump is selected, the later management has little influence.
（5）： Hydraulic loss includes hydraulic friction and local resistance loss. After the pump runs for a certain period of time, it inevitably causes the surface wear of impeller, guide vane and other components, increases the hydraulic loss and reduces the hydraulic efficiency.
（6）： Pump volume loss is also called leakage loss, including impeller seal ring, interstage, axial force balance mechanism three leakage losses. The volume efficiency is not only related to the design and manufacture, but also to the later management. After continuous operation of the pump for a certain period of time, due to the friction between the components, the clearance increases and the volumetric efficiency decreases.
（7）： Due to the blockage of the filter cylinder and the intake of the pipeline, the centrifugal pump is vacuuming and idling. 8. Before the start of the pump, the staff did not pay attention to the preparatory work before the start of the centrifugal pump, and the basic operating procedures such as warm-up pump, disk pump and filling pump were not thoroughly implemented, which often caused cavitation of the pump, resulting in large pump noise, large vibration and low pump efficiency
