Vapor-water sampling suspended iron and ionic iron separation device and corresponding iron content determination method

Abstract

The invention discloses a vapor-water sampling suspended iron and ionic iron separation device and a corresponding iron content determination method. The device comprises a sampling flow regulating valve, a sampling bypass valve, a sampling flow meter, a flat plate filter, a quantitative sampling barrel and a filtrate sampling valve. The device can realize separation of suspended iron and ionic iron in a water sample of a water vapor system, and can respectively detect the corresponding iron content. Iron in the water vapor system is divided into iron oxide in a suspended state and iron ions in an ionic state, total iron (suspended iron and ionic iron) is an important index for reflecting the corrosion condition of the water vapor system, suspended iron is a main reason for scaling of thewater vapor system, and the suspended iron and ionic iron separation device can achieve separation of suspended iron and ionic iron. Corrosion and deposition rules of the water vapor system can be mastered conveniently, and optimization of water vapor indexes is finally realized. According to the method, the average value of the iron content in the water sample within a period of time can be detected, and the representativeness and accuracy of sampling are greatly improved compared with a short-time sampling iron measurement mode.

Description

technical field [0001] The invention belongs to the field of chemical analysis of power plants, and in particular relates to a separation device for sampling suspended iron and ion iron in soda water and a corresponding iron content determination method. Background technique [0002] Iron corrosion products in the water-steam system of power plants are divided into suspended iron and ionic iron. The content of suspended iron is directly related to the scaling rate of thermal equipment in the water-steam system. The total iron content (suspended iron + ionized iron) is related to the The corrosion rate is directly related. Currently, power plants only detect the total iron content, which will lead to the following problems: [0003] 1) The total iron content in the feed water of many power plants is less than 3 μg / L, but the scaling rate of the water supply system is relatively high, and some units with high total iron content have a low scaling rate in the water supply syste...

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Problems solved by technology

[0003] 1) The total iron content in the feed water of many power plants is less than 3 μg / L, but the scaling rate of the water supply system is relatively high, and some units with high total iron content have a low scaling rate in the water supply system;

[0004] 2) In the case of different feed water treatment methods with the same feed water iron content, the scaling rate of the feed water system is very different

[0005] In addition, at present, iron testing in power plants usually takes 100-200ml water samples manually to detect iron content in water. This method has problems such as short sampling time, water samples are easily polluted, and sampling representativeness is not strong.

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