Sulfur trioxide sampling test system and method adopting isopropanol absorption and sulfur dioxide interference removal
A technology of sulfur dioxide and sulfur trioxide, applied in sampling, sampling device, measuring device and other directions, can solve the problems of sampling and test result interference, test result distortion, equipment corrosion, etc., to achieve accurate and stable test results, convenient operation and practicality strong effect
Pending Publication Date: 2021-01-01
XIAN THERMAL POWER RES INST CO LTD +1
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Problems solved by technology
Sulfur trioxide will not only cause equipment corrosion and air preheater blockage, but also increase the opacity of exhaust gas and form colored plumes
However, the isopropanol absorption method is easily affected by many factors during the sampling test process. Among them, the oxidizing substances in the isopropanol solution will oxidize the sulfur dioxide gas present in the exhaust gas to sulfur trioxide, thereby affecting the sampling and test results. Severe interference and influence, which eventually lead to distortion of test results
Method used
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Embodiment 1
[0025] Take the test of sulfur trioxide in the outlet flue gas of a 300MW limestone-gypsum wet flue gas desulfurization system in a coal-fired power plant as an example. According to on-site measurement, the average concentration of sulfur dioxide in the flue gas at the outlet of the absorption tower of the desulfurization system is 15mg / m 3 (standard state, dry basis, actual O 2 ). At the same time, the isopropanol absorption method was used to sample the flue gas at the same test location. The sampling volume of the flue gas was 120L, and the sampling time was 30min. The average concentration of sulfur trioxide obtained after the test and analysis was 8mg / m 3 (standard state, dry basis, actual O 2 ),. Use high-concentration sulfur dioxide standard gas and high-purity nitrogen standard gas in the laboratory to prepare the same (15mg / m3) concentration of sulfur dioxide in the on-site sampling waste gas by gas flow meter and gas mixing device 4 3 (standard state, dry basis,...
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The invention discloses a sulfur trioxide sampling test system and method adopting isopropanol absorption and sulfur dioxide interference removal. A first gas cylinder is filled with sulfur dioxide standard gas, a second gas cylinder is filled with pure nitrogen standard gas, an absorption bottle is filled with an isopropanol absorption liquid, the outlet of the first gas cylinder is communicatedwith the inlet of a gas mixing device through a first flow meter, the outlet of the second gas cylinder is communicated with the inlet of the gas mixing device through a second flow meter, one end ofa first connecting pipeline is communicated with the outlet of the gas mixing device, the other end of the first connecting pipeline is inserted into the isopropanol absorption liquid in the absorption bottle, and a gas outlet is formed in the top of the absorption bottle. The system and the method can improve the accuracy of onsite sulfur trioxide testing.
Description
technical field [0001] The invention belongs to the technical field of sulfur trioxide measurement in industrial waste gas, and relates to a sulfur trioxide sampling and testing system and method which adopt isopropanol to absorb and remove sulfur dioxide interference. Background technique [0002] With the gradual implementation of ultra-low emission standards for air pollutants in my country's coal-fired industry, the discharge of conventional pollutants in industrial waste gas has been effectively controlled, and the harm of unconventional pollutants discharged into the atmosphere to the environment has gradually become prominent. Therefore, industrial waste gas The discharge of unconventional pollutants in China is gradually being paid attention to. As one of the unconventional pollutants, sulfur trioxide is far more harmful than sulfur dioxide to both production equipment and the atmospheric environment. Sulfur trioxide will not only cause equipment corrosion and air pr...
Claims
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Login to View More IPC IPC(8): G01N33/00G01N1/22
CPCG01N33/0014G01N33/0006G01N1/2202G01N1/2247
Inventor 牛拥军余昭雷鸣余福胜李兴华何仰朋王少亮孟令海吴晓龙石振晶宦宣州李楠郭浩然王定邦王韶辉刘海培
Owner XIAN THERMAL POWER RES INST CO LTD