CN102607900A - Coal gas sampling method for determining content of hydrogen cyanide in coal gas - Google Patents
Coal gas sampling method for determining content of hydrogen cyanide in coal gas Download PDFInfo
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- CN102607900A CN102607900A CN2012100746963A CN201210074696A CN102607900A CN 102607900 A CN102607900 A CN 102607900A CN 2012100746963 A CN2012100746963 A CN 2012100746963A CN 201210074696 A CN201210074696 A CN 201210074696A CN 102607900 A CN102607900 A CN 102607900A
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Abstract
The invention provides a coal gas sampling method for determining the content of hydrogen cyanide in coal gas. The coal gas sampling method includes steps of leading coal gas to pass through cadmium acetate liquor so as to absorb hydrogen sulfide in the coal gas; then leading the coal gas to pass through potassium hydroxide liquor twice respectively to absorb the hydrogen cyanide in the coal gas so as to obtain sample absorption liquid absorbed with the hydrogen cyanide; leading the coal gas to pass through sulfuric acid liquor to absorb ammonia in the coal gas so as to protect a flow meter; and finally, leading the coal gas to pass through saturated picric acid liquor to absorb naphthalene in the coal gas and leading the coal gas to pass through the flow meter to obtain coal gas sampling quantity. After the sample absorption liquid absorbed with the hydrogen cyanide is inspected, the content of the hydrogen cyanide in the coal gas is obtained by means of conventional calculation. The coal gas sampling method effectively resolves the problem that as the content of sulfion in absorption liquid for determining the content of the hydrogen cyanide in the prior art is high, the content of the hydrogen cyanide in coal gas cannot be determined by a silver nitrate titration method. In addition, the coal gas sampling method is simple and practicable, and is easy in implementation.
Description
Technical field
The present invention relates to a kind of sampling method, particularly a kind of coke-oven gas sampling method to measure hydrogen cyanide content in the coal gas, belongs to the chemical analysis technical field.
Background technology
Sulfuretted hydrogen and hydrogen cyanide all are the objectionable constituent in the coke-oven gas; In the gas purification process, not only to remove the sulfuretted hydrogen in the coal gas, also to remove the hydrogen cyanide in the coal gas simultaneously; This just need measure to the coal gas before the entering desulfurizer and through the coal gas that desulfurizer comes out; To confirm that the hydrogen cyanide in the coal gas removes situation, in order to measure, need carry out gas sampling before desulfurizer He behind the tower.Conventional sampling is before desulfurizer with behind the tower, to let coal gas feed respectively to be equipped with in the bottle of potassium hydroxide absorption liquid after set volume, send the laboratory to measure.Because hydrogen sulfide content is high in the coal gas before the desulfurizer; Cause the sulfide content in the potassium hydroxide absorption liquid to increase, this can be too high because of hydrogen sulfide content in the test solution in the process of the mensuration hydrogen cyanide content of postorder; And consume too much cadmium acetate solution; Cause test solution PH＜11, can not satisfy the titration condition, thereby can't down measure.Therefore,, coal gas hydrogen cyanide content behind the desulfurizer can only be measured, coal gas hydrogen cyanide content before the desulfurizer can't be measured with conventional sampling method.
Summary of the invention
For solving the above-mentioned deficiency that existing sampling method exists, the present invention provides a kind of gas sampling method that can reduce hydrogen sulfide content in the coal gas.
The present invention realizes through following technical proposal: a kind of gas sampling method of measuring hydrogen cyanide content in the coal gas is characterized in that through the following step:
A, be 5% cadmium acetate solution with coal gas through the 50mL mass concentration, to absorb the sulfuretted hydrogen in the coal gas;
B, will passing through steps A, to remove coal gas behind the sulfuretted hydrogen be respectively 30% potassium hydroxide solution twice through the 50mL mass concentration, to absorb the hydrogen cyanide in the coal gas, must be absorbed with the sample absorption liquid of hydrogen cyanide;
C, will to pass through the coal gas that step B removes behind the hydrogen cyanide be 10% sulfuric acid solution through the 50mL mass concentration, to absorb the ammonia in the coal gas;
D, will pass through step C and remove coal gas behind the ammonia through the saturated picric acid solution of 50mL, to absorb the naphthalene in the coal gas;
E, will pass through the coal gas that step D removes behind the naphthalene and obtain coal gas through volume V through gas meter;
F, with after the step B gained sample absorption liquid censorship, calculate routinely, obtain hydrogen cyanide content in the coal gas.
Said step e coal gas is to measure through the gas meter that is installed on the sampler through volume.
The present invention has advantage and effect: adopt such scheme; Can greatly reduce the sulfide content in the potassium hydroxide absorption liquid easily earlier through the most of sulfuretted hydrogen in the cadmium acetate solution absorption coal gas, the mensuration of postorder hydrogen cyanide content can be carried out smoothly; It is high because of sulphion content in the absorption liquid of measuring hydrogen cyanide content to efficiently solve prior art; And causing measuring the problem of hydrogen cyanide content in the coal gas with silver nitrate titration method, the inventive method is simple, is easy to realize.
Embodiment
Through embodiment the present invention is further specified below.
Embodiment 1
A, be 5% cadmium acetate solution with coal gas through the 50mL mass concentration, to absorb the sulfuretted hydrogen in the coal gas;
B, will passing through steps A, to remove coal gas behind the sulfuretted hydrogen be respectively 30% potassium hydroxide solution twice through the 50mL mass concentration, to absorb the hydrogen cyanide in the coal gas, must be absorbed with the sample absorption liquid of hydrogen cyanide;
C, will to pass through the coal gas that step B removes behind the hydrogen cyanide be 10% sulfuric acid solution through the 50mL mass concentration, to absorb the ammonia in the coal gas;
D, will pass through step C and remove coal gas behind the ammonia through the saturated picric acid solution of 50mL, to absorb the naphthalene in the coal gas;
E, will pass through step D and remove coal gas behind the naphthalene to obtain coal gas through gas meter be 60L through volume V;
F, with after the step B gained sample absorption liquid censorship, calculate by routine, obtain that hydrogen cyanide content is 0.71g/m in the coal gas
3
Claims (2)
1. gas sampling method of measuring hydrogen cyanide content in the coal gas is characterized in that through the following step:
A, be 5% cadmium acetate solution with coal gas through the 50mL mass concentration, to absorb the sulfuretted hydrogen in the coal gas;
B, will passing through steps A, to remove coal gas behind the sulfuretted hydrogen be respectively 30% potassium hydroxide solution twice through the 50mL mass concentration, to absorb the hydrogen cyanide in the coal gas, must be absorbed with the sample absorption liquid of hydrogen cyanide;
C, will to pass through the coal gas that step B removes behind the hydrogen cyanide be 10% sulfuric acid solution through the 50mL mass concentration, to absorb the ammonia in the coal gas;
D, will pass through step C and remove coal gas behind the ammonia through the saturated picric acid solution of 50mL, to absorb the naphthalene in the coal gas;
E, will pass through the coal gas that step D removes behind the naphthalene and obtain coal gas through volume V through gas meter;
F, with after the step B gained sample absorption liquid censorship, calculate routinely, obtain hydrogen cyanide content in the coal gas.
2. gas sampling method according to claim 1 is characterized in that: said step e coal gas is to measure through the gas meter that is installed on the sampler through volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100746963A CN102607900A (en) | 2012-03-21 | 2012-03-21 | Coal gas sampling method for determining content of hydrogen cyanide in coal gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100746963A CN102607900A (en) | 2012-03-21 | 2012-03-21 | Coal gas sampling method for determining content of hydrogen cyanide in coal gas |
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| CN102607900A true CN102607900A (en) | 2012-07-25 |
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| CN2012100746963A Pending CN102607900A (en) | 2012-03-21 | 2012-03-21 | Coal gas sampling method for determining content of hydrogen cyanide in coal gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267658A (en) * | 2013-05-16 | 2013-08-28 | 云南昆钢煤焦化有限公司 | Coal gas sampling method |
| CN104931498A (en) * | 2015-06-30 | 2015-09-23 | 苏州东辰林达检测技术有限公司 | Hydrogen cyanide detection reagent and preparation method thereof |
| CN107167472A (en) * | 2017-05-08 | 2017-09-15 | 长春黄金研究院 | The rapid assay methods of total cyanide in a kind of ore pulp containing cyanogen |
| CN110470789A (en) * | 2019-08-26 | 2019-11-19 | 四川达兴能源股份有限公司 | The measuring method of hydrogen cyanide in a kind of coke-stove gas |
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| US20060110305A1 (en) * | 2002-11-28 | 2006-05-25 | Van De Graaf Jolinde M | Process for removing sulphur compounds including hydrogen sulphide and mercaptans from gas streams |
| CN101289632A (en) * | 2007-04-20 | 2008-10-22 | 宝山钢铁股份有限公司 | Process for removing H2S and HCN in coke oven gas |
| CN102331480A (en) * | 2011-05-31 | 2012-01-25 | 黑龙江建龙钢铁有限公司 | Method for measuring coke oven gas by multiterm series absorption |
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2012
- 2012-03-21 CN CN2012100746963A patent/CN102607900A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060110305A1 (en) * | 2002-11-28 | 2006-05-25 | Van De Graaf Jolinde M | Process for removing sulphur compounds including hydrogen sulphide and mercaptans from gas streams |
| CN101289632A (en) * | 2007-04-20 | 2008-10-22 | 宝山钢铁股份有限公司 | Process for removing H2S and HCN in coke oven gas |
| CN102331480A (en) * | 2011-05-31 | 2012-01-25 | 黑龙江建龙钢铁有限公司 | Method for measuring coke oven gas by multiterm series absorption |
Non-Patent Citations (1)
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| 吴文娟: "用电位滴定法测定焦炉煤气中硫化氢和氰化氢含量", 《燃料与化工》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267658A (en) * | 2013-05-16 | 2013-08-28 | 云南昆钢煤焦化有限公司 | Coal gas sampling method |
| CN104931498A (en) * | 2015-06-30 | 2015-09-23 | 苏州东辰林达检测技术有限公司 | Hydrogen cyanide detection reagent and preparation method thereof |
| CN107167472A (en) * | 2017-05-08 | 2017-09-15 | 长春黄金研究院 | The rapid assay methods of total cyanide in a kind of ore pulp containing cyanogen |
| CN107167472B (en) * | 2017-05-08 | 2019-12-03 | 长春黄金研究院 | The rapid assay methods of total cyanide in a kind of ore pulp containing cyanogen |
| CN110470789A (en) * | 2019-08-26 | 2019-11-19 | 四川达兴能源股份有限公司 | The measuring method of hydrogen cyanide in a kind of coke-stove gas |
| CN110470789B (en) * | 2019-08-26 | 2022-07-05 | 四川达兴能源股份有限公司 | Method for determining hydrogen cyanide in coke oven gas |
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Application publication date: 20120725 |