Method and device for removing cations in steam water of power station

Abstract

The invention belongs to the technical field of cation removal, and relates to a method and device for removing cations in steam water of a power station, and the device comprises a water body circulation pipeline, a continuous electric regeneration module and a hydrogen conductivity meter; the continuous electric regeneration module is arranged on the water circulation pipeline; and the hydrogen conductivity meter is connected with the continuous electric regeneration module. The invention provides the method and the device for removing the cations in the steam water of the power station, which are high in hydrogen conductivity measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of cation removal, and relates to a method and a device for removing cations from soda water in power stations. Background technique [0002] In order to prevent metal corrosion in the thermal system of thermal power plants, ammonia treatment is commonly used in feed water. Ammonia is a volatile substance, except that it reacts with carbonic acid and consumes part of it, it basically stays in the circulation of the thermal system. The ammonia content in the system is about 1-3mg / L. When the unit is in normal operation, the content of other impurity components in desalted water, condensed water, and steam is basically at the microgram level. This milligram-level ammonia causes ordinary conductivity detection to fail to reflect other impurity components, so through the cation exchange column. After the ammonium root is removed, the conductivity can accurately reflect the content of anions in the water vapor. ...

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Problems solved by technology

[0003] 1) In order to ensure the accuracy of sampling, the ion exchange resin column used needs to be replaced regularly; even if the strategy of not replacing is adopted, the ion exchange resin needs to be regenerated regularly, and the cleaning time and cleaning quality after regeneration will be serious. Affect the timeliness and accuracy of hydrogen conductivity measurement

[0004] 2) When cleaning, regenerating or replacing the ion exchange resin, the output data of the hydrogen conductivity measurement system is basically intermittent, and the accurate measurement of the hydrogen conductivity has the most direct relationship with the concentration of cations in the water quality, and frequent start and stop will lead to The hydrogen conductivity measurement is inaccurate, and there are many measurement blind spots

In addition, due to the frequent start-up and shutdown of gas turbine power plants, the ion-exchange resin column needs to be washed for a long time before the reading can be stabilized every time the start-up is started, which cannot effectively guide the adjustment of the water conditions during start-up

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