Method for detecting content of calcium sulfate in sintering desulfurization and denitrification ash

A technology of desulfurization, denitrification and detection method, applied in the field of analytical chemistry, can solve the problem that calcium sulfate cannot be accurately and efficiently detected, and achieves the effect of fast measurement rate, good precision and elimination of influence

Pending Publication Date: 2022-05-10
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for detecting calcium sulfate content in sintered denitrification and denitrification ash, which mainly solves the technical problem that calcium sulfate in sintered denitrification and desulfurization ash cannot be accurately and efficiently detected in the prior art

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  • Method for detecting content of calcium sulfate in sintering desulfurization and denitrification ash

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Embodiment 1

[0029] Embodiment 1, a method for detecting calcium sulfate content in sintered desulfurization and denitrification ash, comprising the following steps:

[0030] 1) To measure the total sulfur content in the sintered desulfurization and denitrification ash, add 0.1500 g of desulfurization and denitration ash sample and 0.2000 g of flux to the porcelain boat, and mix the sample and flux;

[0031] The sample in the porcelain boat was placed in a model SC-144DR high-temperature tube furnace for oxygen combustion, the temperature of the tube furnace was controlled at 1200°C, the oxygen flow rate was 2.8L / min, and the combustion time was 120s; the flux was A mixture of silicon molybdenum powder and COM-CAT powder, the mass ratio of silicon molybdenum powder and COM-CAT powder in the flux is 0.9:1.0;

[0032] Pass the gas produced by combustion into the sulfur-carbon detector, and record that the sulfur-carbon detector detects SO in the gas generated after the sample is burned. 2 T...

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Abstract

The invention discloses a method for detecting the content of calcium sulfate in sintered desulfurization and denitrification ash, and mainly solves the technical problem that the calcium sulfate in the sintered desulfurization and denitrification ash cannot be accurately and efficiently detected in the prior art. According to the technical scheme, the method for detecting the content of calcium sulfate in the sintering desulfurization and denitrification ash comprises the following steps: 1) determining the content of total sulfur in the sintering desulfurization and denitrification ash; 2) measuring the content of sulfur in calcium sulfite in the sintered desulfurization and denitrification ash, adding 0.10-0.30 g of a desulfurization and denitrification ash sample into a beaker, then adding 100 mL of a dissolving solution into the beaker, and uniformly mixing the sample solution by ultrasonic oscillation; measuring the mass content M2 of sulfurous acid ions in the sample solution by using an ion chromatograph; and 3) calculating the mass content of calcium sulfate in the sintered desulfurization and denitrification ash. The method has the advantages of simplicity and convenience in operation, good precision, high accuracy and low detection cost.

Description

technical field [0001] The invention relates to an analysis technology for chemical components in sintered desulfurization and denitration ash, in particular to a method for detecting calcium sulfate content in sintered desulfurization and denitration ash, which belongs to the technical field of analytical chemistry. Background technique [0002] In order to do a good job in reducing sulfide emissions, on the basis of the original sintering circulating fluidized bed desulfurization technology, iron and steel enterprises use ozone to preferentially oxidize nitrogen monoxide in flue gas. Ozone is sprayed into the flue to achieve the purpose of flue gas desulfurization and denitrification. Different from traditional wet or semi-dry desulfurization ash, denitrification and desulfurization ash has complex components, including calcium sulfate, calcium carbonate, calcium sulfite, calcium nitrite, calcium hydroxide, calcium chloride, etc., which is an unprecedented There is curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504G01N5/00
CPCG01N21/3504G01N5/00
Inventor 宋旭飞陆伟星
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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