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One-step method for detecting concentration of chlorine and chlorinated hydrogen in pollution source waste gas

A pollution source and concentration technology, applied in the direction of using chemical indicators for analysis, etc., can solve the problems of high results of hydrogen chloride gas and no elimination of chlorine interference.

Inactive Publication Date: 2011-04-27
BAIYIN NONFERROUS GROUP
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Problems solved by technology

However, the test results of hydrogen chloride often deviate from the actual analysis results of the emissions from production. The reason is that the interference of chlorine gas on hydrogen chloride gas has not been eliminated, resulting in higher results of hydrogen chloride gas in the waste gas from pollution sources.

Method used

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Embodiment Construction

[0015] A kind of one-step method measures the method for chlorine gas and hydrogen chloride gas concentration in pollution source waste gas, and concrete steps are as follows: with two all dress 0.1~0.2 mol / liter of sodium hydroxide absorption solution 50 milliliters of absorption bottle serial sampling, after sample is collected, Combine the sample solutions in the two absorption bottles, and add 0.1-0.2 mol / liter sodium hydroxide absorption solution until the total sample solution volume reaches 125 ml; first take 25 ml of the total sample solution and transfer it to the iodine bottle, Then take 25 milliliters of the sample solution to measure the total hydrogen chloride concentration in the sample solution by the silver nitrate volumetric method; finally calculate the actual concentration of hydrogen chloride with the calibration formula.

[0016] Wherein, the formula for determining chlorine gas concentration by iodometric method is:

[0017] =[(A-B)×C(1 / 2Na 2 S 3 0 3...

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Abstract

The invention discloses a one-step method for detecting the concentration of chlorine and chlorinated hydrogen in pollution source waste gas, which has the following steps of: connecting in series two absorption bottles respectively filled with 50 ml of alkali absorption solution with concentration of 0.1-0.2 mol / L for sampling; after collecting the samples, mixing sample solutions in the two bottles, and adding the alkali absorption solution with concentration of 0.1-0.2 mol / L until the total sample solution volume reaches 125 ml; moving 25 ml of solution from the total sample solution to an iodine flask for detecting the concentration of chlorine by using iodometry, and then moving 25 ml of solution sample solution for detecting the concentration of total chlorinated hydrogen in the sample solution by using silver nitrate volumetric method; and finally, calculating the actual concentration of chlorinated hydrogen by using a corrector formula. The method can be used for simultaneously analyzing chlorine and chlorinated hydrogen by one share of absorption solution, and eliminate the positive interference of chlorine to chlorinated hydrogen, thereby accurately determining the concentration of chlorine and chlorinated hydrogen in pollution source waste gas.

Description

technical field [0001] The invention relates to a method for measuring the concentration of chlorine gas and hydrogen chloride gas in waste gas, in particular to a method for accurately detecting, analyzing and calculating the concentration of chlorine gas and hydrogen chloride gas in waste gas from pollution sources discharged in the production process of chlor-alkali industry and chlorination metallurgical industry. Background technique [0002] For a long time, in the monitoring of pollution sources, we have been monitoring chlorine and hydrogen chloride using the pollution source detection methods specified in the "Ambient Air Monitoring Quality Assurance Manual". Among them, chlorine gas is measured by iodometric method, and hydrogen chloride gas is measured by silver nitrate volumetric method. However, the test results of hydrogen chloride often deviate from the actual analysis results of production emissions. The reason is that the interference of chlorine gas on hydr...

Claims

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Application Information

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IPC IPC(8): G01N31/22
Inventor 王新文刘亚雄段宏志
Owner BAIYIN NONFERROUS GROUP
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