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Method for analyzing hydrogen sulfide in coke oven gas

An analysis method, hydrogen sulfide technology, applied in the field of analysis, can solve the problems of cumbersome analysis process, large system error, and large measurement error, and achieve the effects of improving detection efficiency, small system error, and high degree of automation

Inactive Publication Date: 2013-02-06
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iodometric method is a traditional hydrogen sulfide determination method, which has a large sampling volume, cumbersome analysis process, and long analysis time. One sample takes 2 to 3 hours. The system error is large, which brings inconvenience to production adjustment and control, and cannot meet the needs of modern production. ; The determination range of the methylene blue method is small, suitable for 0 ~ 25mg / m 3 , and the mass concentration of hydrogen sulfide is required to be stable; the determination error of the lead acetate quick test method is relatively large

Method used

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  • Method for analyzing hydrogen sulfide in coke oven gas
  • Method for analyzing hydrogen sulfide in coke oven gas
  • Method for analyzing hydrogen sulfide in coke oven gas

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Experimental program
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Effect test

Embodiment 1

[0035] A kind of analysis method of hydrogen sulfide in coke oven gas, its step:

[0036] 1) Establish analysis conditions:

[0037] Equipment: a gas chromatograph with a flame photometric detector, in which the chromatographic column is a GC-Gaspro chromatographic column with a specification of 30.00m × 0.3 2mm; a chromatographic workstation;

[0038] The vaporization temperature at the inlet of the gas chromatograph with a flame photometric detector is set at 150-160°C;

[0039] The detection temperature of the detector on the gas chromatograph with flame photometric detector is set to: 200~210°C;

[0040] Carrier gas N 2 The column flow rate is set to: 2.0 mL / min; the hydrogen flow rate is set to: 75 mL / min;

[0041] The air flow rate is set to: 95 mL / min;

[0042] The amount of sample gas entering the chromatographic column is 1 / 50 of the total flow of sample gas;

[0043] N supplemented at the end of the column 2 The flow rate is set to: 40 mL / min;

[0044] The amo...

Embodiment 2

[0054] A kind of analysis method of hydrogen sulfide in coke oven gas, its step:

[0055] 1) Establish analysis conditions:

[0056] Equipment: gas chromatograph with flame photometric detector, in which the type of chromatographic column is GC-Gaspro chromatographic column, the specification is 30.00m × 0.3 2mm; chromatographic workstation;

[0057] The vaporization temperature at the inlet of the gas chromatograph is set at 160-170°C;

[0058] The detection temperature of the detector on the gas chromatograph is set at 220-230°C;

[0059] Carrier gas N 2 The column flow rate is set to: 2.4mL / min; the hydrogen flow rate is set to: 70 mL / min;

[0060] The air flow rate is set to: 90 mL / min;

[0061] The amount of sample gas entering the chromatographic column is 1 / 60 of the total flow of sample gas;

[0062] N supplemented at the end of the column 2 The flow rate is set to: 50 mL / min;

[0063] The amount of sample gas to be tested entering the chromatographic column is se...

Embodiment 3

[0073] A kind of analysis method of hydrogen sulfide in coke oven gas, its step:

[0074] 1) Establish analysis conditions:

[0075] Equipment: gas chromatograph with flame photometric detector, in which the type of chromatographic column is GC-Gaspro chromatographic column, the specification is 30.00m × 0.3 2mm; chromatographic workstation;

[0076] The vaporization temperature at the inlet of the gas chromatograph is set at 180-190°C;

[0077] The detection temperature of the detector on the gas chromatograph is set at 230-240°C;

[0078] Carrier gas N 2 The column flow rate is set to: 3.0 mL / min; the hydrogen flow rate is set to: 80 mL / min;

[0079] The air flow rate is set to: 95 mL / min;

[0080] The amount of sample gas entering the chromatographic column is 1 / 55 of the total flow of sample gas;

[0081] N supplemented at the end of the column 2 The flow rate is set to: 55 mL / min;

[0082] The amount of the sample gas to be tested entering the chromatographic colum...

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Abstract

A method for analyzing hydrogen sulfide in coke oven gas comprises the following steps: establishing an analysis condition; preparing 8 L standard sample gas; controlling the content of hydrogen sulfide in the standard sample gas at 100-10000 mg / m3; analyzing the standard sample gas by using a gas chromatograph with a flame photometric detector; drawing an analysis result into a standard sample gas quadratic equation curve graph by using an external standard method calculation formula; collecting sample gas; analyzing the sample gas on the gas chromatograph with the flame photometric detector by using the same method as for the standard sample gas; and figuring out the content of hydrogen sulfide in the sample gas by using the quadratic equation curve graph obtained during analyzing the standard sample gas. According to the invention, the test sample analysis time of detecting the content of hydrogen sulfide in the gas is reduced from the original at least 2 hours to less than 3 minutes; small system error, reliability of more than 95% and relative precision standard deviation of less than 2.5% are achieved; and timely instruction information is provided to production.

Description

technical field [0001] The invention relates to an analysis method, in particular to a method for analyzing hydrogen sulfide in coke oven gas. Background technique [0002] In the process of coking to produce coke, the yellowish-brown gas-gas mixture produced when the furnace coal is dry-distilled in the coking chamber of the coke oven is called coke oven gas. Hydrogen sulfide in coke oven gas is 4~10g / m 3 , is a highly toxic and highly corrosive harmful substance. When hydrogen sulfide is burned, it produces SO 2 and SO 3 , contact with water to form acid mist and acid rain, causing damage to the environment and endangering human health. In recent years, countries all over the world have restricted the hydrogen sulfide content in coke oven gas. When it is used to smelt high-quality steel, the hydrogen sulfide content is 1-2 g / m 3 , when used as city gas, the allowable content of hydrogen sulfide is less than 20mg / m 3 , it can be seen that the hydrogen sulfide content ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 刘翠霞张贺娟张广义黄琮发王兰常红兵刘向勇张峥
Owner 武钢集团有限公司
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