Method for reducing dissolved oxygen in condensate based on dry screw pump
A technology of screw pump and condensate water, applied in the direction of pumps, steam/steam condensers, lighting and heating equipment, etc., can solve the problem that the non-condensable gas of the condenser cannot be completely extracted, avoid serious oxygen corrosion, reduce dissolved oxygen quantity, the effect of improving the service life
Active Publication Date: 2022-04-19
河北建投能源科学技术研究院有限公司 +1
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Problems solved by technology
[0007] The technical problem to be solved in the present invention is to provide a method for reducing dissolved oxygen in condensed water based on a dry screw pump to solve the problem that the non-condensable gas in the condenser cannot be completely extracted due to the influence of the ultimate vacuum factor of the water ring pump. Thereby effectively reducing the amount of dissolved oxygen in condensed water and improving the economy and safety of unit operation
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[0025] The present invention will be clearly and completely described below in conjunction with specific embodiments and drawings. Apparently, the described embodiments are only some embodiments of the present invention, rather than all embodiments.
[0026] A method for reducing dissolved oxygen in condensed water based on a dry screw pump, combining figure 1 As shown in the figure, when there is a water ring pump limit suction capacity limitation in the condenser vacuum pumping system of a power plant, the selection of a dry screw pump with an appropriate power includes judging whether there is a limit suction capacity limit, determining the quality of the pumped air, and calculating The pumping rate of the vacuum system, the selection of the dry screw pump model, the determination of the configured power of the dry screw pump, and the steps for setting and running the dry screw pump are as follows:
[0027] S1. By counting the minimum temperature of the power plant, the coo...
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The invention discloses a method for reducing dissolved oxygen in condensed water based on a dry screw pump, which is used for judging whether there is a limitation on the limit suction capacity of a water ring pump in a condenser vacuum system of a power plant, and then selecting a dry screw pump with suitable power. Including judging whether there is an ultimate suction capacity limit, determining the quality of the dry air, calculating the pumping rate of the vacuum system, selecting the model of the dry screw pump, determining the configuration power of the dry screw pump, and setting and running the dry screw pump. step. The invention can timely extract the non-condensable gas in the vacuum system of the condenser of the power plant, can significantly reduce the dissolved oxygen amount of the condensed water, control the dissolved oxygen amount of the condensed water below 8ug / L, and avoid serious oxygen corrosion of the heat recovery system equipment , Effectively improve the service life of the unit, the economy and safety of operation.
Description
technical field [0001] The invention relates to the technical field of electric power production, and more specifically relates to a method for reducing dissolved oxygen in condensed water. Background technique [0002] With the improvement of parameters and degree of automation of condensing steam turbine generator sets, the working medium of thermal cycle—condensate has higher and higher quality requirements. The amount of dissolved oxygen in condensate water is one of the important indicators to characterize the quality of condensate water. [0003] The dissolved oxygen in the condensed water of the steam turbine generator set exceeds the standard, which causes many harms to the unit. First, it reduces the heat exchange efficiency of the steam turbine heat recovery equipment, increases the heat transfer resistance of the surface heat exchanger, and reduces the cycle heat efficiency; Equipment life, when the oxygen-enriched condensed water passes through the thermal equipm...
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IPC IPC(8): F28B9/10F04C25/02
CPCF28B9/10F04C25/02
Inventor 王彦海郭江龙冯爱华杨一盈梁彦军张俊牛郑伟董玲魏庆超李博
Owner 河北建投能源科学技术研究院有限公司