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Sulphates content testing method in flue gas desulfurization system

A desulfurization system and testing method technology, applied in chemical analysis by titration, chemical analysis by precipitation, etc., can solve the problem of not considering the influence of sulfite determination, achieve accurate and reliable method, improve accuracy and reliability Effect

Inactive Publication Date: 2009-08-19
HEBEI ELECTRIC POWER RES INST
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AI Technical Summary

Problems solved by technology

Most units are directly determined by gravimetric method or barium chromate photometry, but the influence of sulfite on the determination is not considered

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0030] 1. Test equipment

[0031] Standard sieve: 250um and 150um; Analytical balance: accuracy of 0.1mg and above;

[0032] Muffle Furnace: Muffle heating furnace with resistance heating on the periphery of the furnace. A temperature controller should be used to accurately control the furnace temperature and be calibrated regularly; filter paper: ashless slow quantitative filter paper.

[0033] 2. Reagents

[0034] 1. (1+1) hydrochloric acid solution: 1 volume of concentrated hydrochloric acid is mixed with 1 volume of water;

[0035] 2. Barium chloride solution (50g / l): Weigh 60g of barium chloride dihydrate, dissolve it in water, and dilute to 11 with water;

[0036] 3. Hydrogen peroxide solution (1+9): dilute 30% hydrogen peroxide solution with water;

[0037] 4. Buffer solution with a pH of 4: Weigh 75g of sodium acetate and dissolve it in 500ml (1+2) of acetic acid;

[0038] 5.0.1mol / L sodium thiosulfate standard solution: directly prepared with standard molar reage...

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Abstract

The invention provides a test method of the sulphate content in a flue gas desulfurization system, relating to the technical field of a test method of the sulphate content in a desulphurization system. The test method is characterized in that two samples to be tested are taken simultaneously, wherein one sample is used for determining the sulphite content, and the other sample is used for determining the total content of the sulphite and sulphate; and the sulphate content is calculated by the difference between the total content of the sulphite and sulphate and the sulphite content. The test method has the positive effects that the method is accurate, thus greatly improving the accuracy and the reliability of analysis results of the sulphate in the desulphurization system, and providing reliable analysis results for the operation of the desulphurization system. As the sulphite content in the desulphurization system is an indispensable project to be tested in the conventional analysis, thus not increasing the workload when determining the sulphate content. As the test can be completed only by using an analytical instrument in a conventional laboratory, and a determining project and a determining instrument do not need to be increased, the test method is a very practical analysis method.

Description

technical field [0001] The invention relates to the technical field of a determination method for sulfate content in a flue gas desulfurization system. Background technique [0002] In flue gas desulfurization projects, the sulfate content not only affects the quality of desulfurization products, but also affects the operation of the entire desulfurization system. In the wet flue gas desulfurization system, if the sulfite content is too high, it will easily cause the slurry in the absorption tower to be sticky and difficult to dehydrate, making the slurry easy to adhere to and scale on the system and equipment, resulting in increased equipment resistance and even system failure. clogged. Therefore, it is necessary to grasp the sulfate content in the absorption tower slurry and desulfurization products in time, so as to adjust the operating parameters of the system oxidation fan, improve the sulfite oxidation rate, and accurately measure the sulfate content in the absorption...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N31/02
Inventor 宋晓红刘克成宋国升
Owner HEBEI ELECTRIC POWER RES INST
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