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Method for measuring content of calcium sulfite in sintering desulfurization and denitrification ash

A technology of desulfurization, denitrification and calcium sulfite, which is applied in the field of chemical analysis, can solve the problem that the content of calcium sulfite cannot be accurately measured, and achieves the effect of simple, fast, and high precision operation.

Active Publication Date: 2020-02-14
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for determining the content of calcium sulfite in sintered desulfurization and denitrification ash, which mainly solves the technical problem that the content of calcium sulfite in the existing sintered desulfurization and denitration ash cannot be accurately measured

Method used

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  • Method for measuring content of calcium sulfite in sintering desulfurization and denitrification ash
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  • Method for measuring content of calcium sulfite in sintering desulfurization and denitrification ash

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Embodiment 1

[0038] Example 1, the sintering flue gas desulfurization and denitrification works normally, 10 minutes after the denitrification and desulfurization tower is fed, the ash at the bottom of the sintering flue gas desulfurization tower is taken for detection, and the detection sample size is 1.0 g.

[0039] A method for assaying calcium sulfite content in sintered desulfurization and denitrification ash, said method comprising the following steps:

[0040] 1) preparing a washing solution, the washing solution is composed of water, ethanol and sodium pyrophosphate; the washing solution contains 1% sodium pyrophosphate and 70% ethanol, and the balance is water, specifically dissolving sodium pyrophosphate in water, Then add ethanol;

[0041] 2) Clean the sample, weigh 1.0024g of the desulfurization and denitrification ash sample on the slow quantitative filter paper, put the filter paper into the funnel, wash the sample with washing solution, use 50ml of washing solution each time...

Embodiment 2

[0047] Example 2, the desulfurization and denitrification of sintering flue gas works normally, the normal desulfurization and denitration treatment is performed on the sintering flue gas, and the ash from the denitrification and desulfurization ash store is used for detection, and the detection sample size is 0.5g.

[0048] A method for assaying calcium sulfite content in sintered desulfurization and denitrification ash, said method comprising the following steps:

[0049] 1) Prepare a washing solution, which is composed of water, ethanol and sodium pyrophosphate. The washing solution contains 1.2% sodium pyrophosphate and 72% ethanol, and the balance is water, specifically dissolving sodium pyrophosphate in water, and then adding ethanol;

[0050] 2) Clean the sample, weigh 0.5018g of desulfurization and denitrification ash sample on the slow quantitative filter paper, put the filter paper into the funnel, wash the sample with washing solution, use 50ml of washing solution e...

Embodiment 3

[0056] Example 3: In the sintering flue gas desulfurization and denitrification tower, only the desulfurization device is turned on, and the denitrification device is not turned on. The ash from the denitrification and desulfurization ash store is used for detection, and the detection sample size is 0.2 g.

[0057] A method for assaying calcium sulfite content in sintered desulfurization and denitrification ash, said method comprising the following steps:

[0058] 1) Prepare a washing solution, which is composed of water, ethanol and sodium pyrophosphate. The washing liquid contains 0.8% sodium pyrophosphate and 69% ethanol, and the balance is water, specifically dissolving sodium pyrophosphate in water, and then adding ethanol;

[0059] 2) Clean the sample, weigh 0.2018g of desulfurization and denitrification ash sample on the slow quantitative filter paper, put the filter paper into the funnel, wash the sample with washing solution, use 50ml of washing solution each time, wa...

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Abstract

The invention discloses a method for measuring content of calcium sulfite in sintering desulfurization and denitrification ash, and mainly solves the technical problem that the content of calcium sulfite in the existing sintering desulfurization and denitrification ash cannot be accurately measured. The technical scheme is as follows: the method for measuring the content of calcium sulfite in sintering desulfurization and denitrification ash comprises the following steps: preparing a washing solution, dissolving sodium pyrophosphate in water, and then adding ethanol, wherein the washing solution comprises the following components in percentage by mass: 68-72% of ethanol, 0.8-1.2% of sodium pyrophosphate and the balance of water; cleaning a sample; transferring filter paper with the sampleinto a beaker with the volume of 300mL, adding 100mL of water, 20mL of iodine standard solution and 4 6mL of HCL solution into the beaker, placing the beaker in a dark place for 8-12 minutes, and titrating the solution in the beaker by using sodium thiosulfate; and calculating the mass content of calcium sulfite in the sintering desulfurization and denitrification ash. The method disclosed by theinvention is simple and convenient to operate and high in accuracy.

Description

technical field [0001] The invention relates to a method for detecting component content of sintered desulfurization and denitration ash, in particular to a method for determining calcium sulfite content in sintered desulfurization and denitration ash, which belongs to the technical field of chemical analysis. Background technique [0002] In recent years, as people pay more attention to environmental protection, the control of nitrogen oxide emissions has become an important control indicator for industrial emission reduction. In iron and steel metallurgical enterprises, sintered nitrogen oxides (NO X ) emissions accounted for about half of the total emissions. In order to further reduce the emission of nitrogen oxides, on the basis of sintering circulating fluidized bed desulfurization technology, use ozone to preferentially oxidize NO in the flue gas, and spray it on the inlet flue of circulating fluidized bed desulfurization device Ozone, which first oxidizes NO to NO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 陆伟星穆海玲宋旭飞王鑫艳
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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