Method for reducing dissolved oxygen in condensed water based on dry screw pump
A technology of screw pump and condensate water, applied in the direction of pump, steam/steam condenser, machine/engine, etc., can solve the problem that the non-condensable gas of the condenser cannot be completely extracted, avoid serious oxygen corrosion, improve service life, The effect of reducing the amount of dissolved oxygen
Active Publication Date: 2020-12-11
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. The method is used for judging whether a vacuum pumping system of a condenser of a power plant has limit on the limit pumping capacity of a water ring pump or not so as to select the dry screw pump with proper power. The method comprises the steps of judging whether limit on the limit pumping capacity exists or not, determining the quality of air to be pumped, calculating the pumping speed of the vacuum pumping system, selecting the type of the dry screw pump, determining the configuration power of the dry screw pump, and setting and operating the dry screw pump. According to the method for reducing the dissolved oxygen in condensed water based on the dry screw pump, the non-condensable air in the vacuum system of the condenser of the power plant can be pumped out in time, and the dissolved oxygen amount of condensed water can be obviously reduced, and is controlled to be 8 micro-grams per liter or below, so that severe oxygen corrosion of regenerative system equipment is avoided, the service life of a unit is effectively prolonged, and the economical efficiency and the safety of the unit operation are effectively improved.
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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Login to View More 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