fuyangby@126.com
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fuyangby@126.com
86 15188770013
1. Export throttling flow regulation
Export throttling flow regulation is one of the most common methods of flow regulation. By closing the valve on the outlet pipeline to increase the system head, the system head curve intersects with the slurry pump head curve at low flow rates. However, throttling at the outlet will move the operating point to a lower efficiency point, and there will be power loss at the throttle valve. Throttling to the dead end may cause the liquid in the pump to overheat, so a bypass can be used to maintain the necessary minimum flow rate, or different regulating devices can be used.
2. Inlet throttling flow regulation
By throttling in the suction pipeline, some power can be saved. Due to the risk of liquid overheating or vaporization caused by outlet throttling, jet engine fuel slurry pumps often use inlet throttling. At low flow rates, the impellers of these pumps are only partially filled with liquid. Therefore, when the outlet is throttled, the input power and temperature rise are about 1/30 of the full operating position of the impeller.
3. Bypass regulation
All or part of the flow can be diverted from the discharge pipeline of the slurry pump and led to the pump's suction port or other suitable point through a bypass pipe. One or more flow orifice plates and suitable control valves can be installed in the bypass. The metering bypass is usually used to reduce the flow of boiler feedwater pumps, mainly to prevent overheating. If the excess flow of the bypass propeller pump is used to replace the outlet throttle valve, significant power savings can be achieved.
4. Speed regulation
When adjusting the flow rate through speed, the required power can be reduced and the overheating phenomenon during the flow rate adjustment process can be eliminated. Steam turbines and internal combustion engines can easily adapt to speed regulation with minimal additional cost. Various mechanical, magnetic, hydraulic transmission devices, as well as DC and AC variable speed motors, can be used to regulate speed.
5. Qi replenishment regulation
Supplying gas to the suction port of the slurry pump is also a method of regulating flow rate, which can save some power compared to outlet throttling. However, it is not desirable to have air in the conveyed liquid, as excessive air always poses a risk of causing the pump to lose its filling head. Therefore, except for a few occasions, this method is rarely used in practice.
conclusion
Flow control has a significant impact on the efficiency of slurry pumps. By using reasonable flow control methods such as outlet throttling, suction throttling, bypass regulation, speed regulation, and air supply regulation, the working efficiency of slurry pumps can be effectively improved, energy consumption can be reduced, and the service life of equipment can be extended. However, different flow control methods are applicable to different working conditions, and appropriate flow control strategies need to be selected according to specific application scenarios.
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(Editor in charge: Slurry Pump https://www.fuyangpumps.com/)
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