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

Inactive Publication Date: 2018-04-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

At present, in the circulating water system of power plants, the circulating water flow is mainly controlled by starting and stopping the pumps, but this control method cannot continuously adjust the circulating water flow, so that the actual operating state of the steam unit is far from the most favorable vacuum position.

Method used

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  • Optimal regulation method for opening degree of vanes of circulating water pump
  • Optimal regulation method for opening degree of vanes of circulating water pump
  • Optimal regulation method for opening degree of vanes of circulating water pump

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Embodiment Construction

[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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Abstract

Disclosed is an optimal regulation method for the opening degree of vanes of a circulating water pump. Pipeline characteristics of unit operation are worked out, working points and economy conditionsof a unit circulating water system under various work conditions are computed according to performance characteristics of the circulating water pump, and the power consumption of the water pump is made to be the minimum within a reasonable range of the vacuum degree of a condenser by regulating the opening degree of the vanes of the pump, so that the purposes of cold side optimization and energy conservation are realized.

Description

technical field [0001] The invention belongs to the technology in the field of steam turbines, and in particular relates to a method for optimizing and adjusting the blade opening of a circulating water pump. Background technique [0002] As the core component of the steam turbine system, the vacuum degree of the condenser directly affects the economy and safety of the steam turbine system, and the most direct reason for affecting the vacuum degree of the condenser is the circulating water volume and the inlet temperature of the circulating water. Therefore, under a certain steam turbine load Under the condition of inlet water temperature and inlet water temperature, adjusting the circulating water volume within a suitable range is an important means to ensure the safe and economical operation of the unit. At present, in the circulating water system of power plants, the circulating water flow is mainly controlled by starting and stopping the number of water pumps, but this c...

Claims

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Application Information

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IPC IPC(8): F04D15/00
CPCF04D15/0055
Inventor 韩丰胜张萌远余松忻建华
Owner SHANGHAI JIAO TONG UNIV
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