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Method and device for online measurement of total iron in water vapor of power station

A measurement method and water vapor technology, applied in the field of test and detection, can solve the problems of energy saving and consumption reduction of unfavorable power stations, adding a lot of ammonia water, and taking a long time to achieve the effect of reducing measurement steps and adding amount of chemicals, and achieving a high degree of intelligence.

Pending Publication Date: 2022-08-02
浙江西热利华智能传感技术有限公司
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Problems solved by technology

However, since colloidal iron needs to be converted into dissolved iron before detection, strong acid needs to be added and cooking is required, and concentrated ammonia water needs to be added to the water sample converted into dissolved iron to adjust the pH before measurement can be carried out. The steps are complicated, time-consuming, and adding ammonia water There are many and uncertain quantities, so that the online monitoring of total iron in the water vapor of the power station cannot be realized; and the laboratory detection in the routine measurement process is heavy and time-consuming, especially when the unit is shut down and started, because the colloidal iron cannot be quickly converted into a dissolved state Iron causes a serious lag in the measurement results of total iron, and it is impossible to monitor the total iron content in the effluent in time to guide the adjustment of water conditions, which is not conducive to the energy saving and consumption reduction of the power station

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  • Method and device for online measurement of total iron in water vapor of power station

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Embodiment 1

[0039] refer to figure 1 , This embodiment provides an on-line measurement method for total iron in water vapor in a power station, which can measure the total iron content of 0.5-1000 μg / L, wherein the method includes the following steps:

[0040] 1) Continue to inject the water sample containing colloidal iron into the overflow cup 1;

[0041] Among them, the main form of iron in water samples is colloidal iron.

[0042] 2) After the water sample flows out from the overflow cup 1, it flows into the No. 1 three-way valve 3 under the pressure of the pump 2, and at the same time, a catalytic agent is added to the No. 1 three-way valve 3 to mix with the water sample;

[0043] Specifically, the catalyst includes persulfate as (NH 4 ) 2 S 2 O 8 , NH 4 Ac, NH 4 NO 3 , first-grade reagent water, and (NH 4 ) 2 S 2 O 8 : NH 4 Ac:NH 4 NO 3 : The mass percentage of the first-grade reagent water is 4-5:2-5:4-10:80-90, and its mass percentage is preferably 4:2:4:90.

[004...

Embodiment 2

[0062] This embodiment provides an on-line measurement device for all iron in water vapor in a power station, including an overflow cup 1, a pump 2, a No. 1 three-way valve 3, an ultraviolet light oxidizer 5, a No. 2 three-way valve 7, a No. The three-way valve 8 and the optical sensing system 11 also include a catalytic agent storage tank 4 in communication with the No. 1 three-way valve 3, a concentration system 6 in communication with the No. 2 three-way valve 7 and the No. 3 three-way valve 8, respectively, and The medicine A storage tank 9 communicated with the optical sensing system 11 , the medicine B storage tank 10 communicated with the optical sensing system 11 , and the data processing system 12 signally connected with the optical sensing system 11 .

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Abstract

The invention relates to the technical field of test detection, in particular to an on-line measurement method and device for total iron in power station water vapor, a catalytic agent is added into a water sample to be measured, colloidal iron in the water sample is thoroughly converted into ferric ions under the action of an ultraviolet light oxidizer, and dissolution and conversion of the colloidal iron are completed without adding acid in the whole process; as no acid is added in the whole process of converting the colloidal iron into the dissolved iron, the total iron content in the water sample can be accurately measured only by adding the color developing agent, and the online measurement of the total iron in the water sample can be realized more easily; when the total iron content in the water sample is less than 10 [mu] g / L, the water sample enters a concentration system to be concentrated and then is subjected to optical measurement, so that the low-concentration total iron in the water sample can be accurately measured; the measuring method can automatically measure the total content in the water sample on line, avoids manual sampling detection, can monitor the total iron in the water sample in real time, is lower in detection limit and more accurate in detection result, and is favorable for adjusting the water working condition in the shutdown and start-up stage of a power station.

Description

technical field [0001] The invention relates to the technical field of test detection, in particular to an on-line measurement method and device for whole iron in water vapor in a power station. Background technique [0002] On-line monitoring of the whole iron in the water vapor in the power station is a big problem. At present, when the whole iron in the water vapor in the power station is detected, because the iron in the water vapor in the power station is mostly in the form of colloidal iron, the colloidal iron must be converted into colloidal iron before detection. Dissolved iron is measured again. Generally, strong acid and oxidizing agent are added when taking water samples, and the colloidal iron is completely converted into dissolved iron by cooking, and then measured by atomic absorption method or phenanthroline spectrophotometry. To get the exact content of total iron. However, before detection, the conversion of colloidal iron into dissolved iron requires the a...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N21/01G01N1/28G01N1/38G01N1/40
CPCG01N21/84G01N21/01G01N1/28G01N1/38G01N1/40G01N2021/0112
Inventor 田利汪德良庞胜林张良戴鑫张龙明陈戎曹士海
Owner 浙江西热利华智能传感技术有限公司
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