Optimal regulation method for opening degree of vanes of circulating water pump
A circulating water pump and circulating water technology, which is applied in the field of steam turbines, can solve the problems of the large difference in the vacuum degree position of the steam unit and the inability to continuously adjust the circulating water flow, so as to improve the operation economy, reduce the power consumption rate, and save the power consumption of the plant. Effect
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[0050] Figure 7 ~ Figure 9 It is the pump characteristic curve pre-fitted according to the operating data of the circulating water pump, which are the flow-pressure head, flow-power and flow-efficiency curves of the pump.
[0051] It is known from the site that the single pump of the steam turbine unit must close the outlet disc valve to a 45% to 50% opening in order to operate normally.
[0052] Calculate the pipeline characteristic curve of a single pump, and draw the pipeline characteristic curve and the water pump characteristic curves with different openings on a graph. Figure 10 It is the operating point of a single pump, the opening of the outlet valve disc is 50%, and the pump operates under various blade openings.
[0053] Depend on Figure 10 It can be seen that when the opening of the outlet valve disc is 50%, the opening of the pump blades can work above 64%. The circulating water flow rate is 42m3 / h when the pump leaf opening is 64% when the single pump is ru...
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