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1. Adopt high-efficiency and energy-saving water pumps and high-efficiency and low-loss motors, and improve the efficiency of transmission devices.
2. Correctly select the power of the water pump motor. Prevent "big horses and small carts". Replace the overcapacity water pump motor. When the power of the motor is much greater than the actual need, the method of replacing the motor can be used to save electricity.
3. Choose a reasonable lift. When the head of the pump leaves too much margin. It will waste electric energy, so the head of the pump's operating point should be reasonably determined. 4. Reduce pipeline resistance. Eliminate redundant pipe fittings, unnecessary turns and sharp angles on the pipeline to reduce pipeline resistance and reduce unit power consumption for water delivery.
The methods to reduce pipeline resistance include:
①. Pipeline design should be reasonable.
②. Increase the pipe diameter or use double pipe drainage to reduce the flow rate.
③. Shorten the length of the pipeline as much as possible, reduce joints, elbows and valves, and especially avoid the appearance of sharp angles.
④. Improve the smoothness of the inner wall of the pipeline or add a coating.
⑤. Remove the dirt on the inner wall of the pipeline in time.
5. Water pump speed regulation saves electricity. The power consumption of the water pump is proportional to the cube of the speed of the unit, so the speed of the unit should be changed according to the actual load conditions. Can greatly save electric energy. Adopting pump speed regulation measures, the initial investment is relatively large, but the power saving effect is remarkable, especially suitable for large-capacity water pumps. It should be noted that the larger the head, the flatter the resistance curve, even if the speed changes slightly, the flow rate will change greatly, and the power saving effect is poor.
6. Transform the impeller of the water pump. When the flow rate of the pump in use is larger than the actual required flow rate, and the speed control cannot be used or the price of the speed control device is uneconomical, the impeller of the original pump can be turned for a section or the impeller can be replaced to reduce the flow rate and Head, in order to reduce the running power consumption of the pump.
If the feedwater pump is designed using the same conversion method, after obtaining the speed n of the required operating conditions, the individual arcs of the corresponding operating conditions can be converted according to the formula: or the rotational speed and multi-stage The characteristic curve of the fire pump's initial and final operating conditions is the first step in the design and calculation of the feed water pump. In order to make the feed water pump run quietly and reliably under all operating conditions, the extremely serious condition is to ensure that no cavitation occurs under each operating condition, and the guarantee condition for no cavitation should be given by the front Booster pump supply for the water pump. Design and calculation of pre-boosted fire pump The pre-boosted pump is referred to as the booster pump for short, it is placed before the suction of the boiler feed water pump, and provides the feed water pump with sufficient suction pressure to avoid cavitation under operating conditions . Before designing and calculating the booster pump, it is necessary to first confirm the design calculation flow and head value of the single-stage fire pump. It is precisely because of the connection between the booster pump and the feedwater pump that the exact design and calculation parameters of the booster pump are all related to the corresponding working condition parameters of the feedwater pump.
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