CN103018412A - Measuring method of limestone consumption in limestone-gypsum wet desulphurization device - Google Patents
Measuring method of limestone consumption in limestone-gypsum wet desulphurization device Download PDFInfo
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- CN103018412A CN103018412A CN2012105463693A CN201210546369A CN103018412A CN 103018412 A CN103018412 A CN 103018412A CN 2012105463693 A CN2012105463693 A CN 2012105463693A CN 201210546369 A CN201210546369 A CN 201210546369A CN 103018412 A CN103018412 A CN 103018412A
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- limestone
- flue gas
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Abstract
The invention relates to a measuring method of limestone consumption in a limestone-gypsum wet desulphurization device. The measuring method comprises the following steps: measuring concentration of SO2 in the original flue gas, measuring concentration of SO2 in the clean flue gas, measuring amount of the flue gas processed by the wet desulphurization device, calculating calcium sulfur ratio, calculating mass percent of CaCO3 in the limestone and calculating the limestone consumption. According to the measuring method, the error caused by direct adoption of a measuring system (a belt weigher or a level meter) can be avoided; the measuring results of other factors in the performance assessment test of the desulphurization device can be fully utilized; the test working condition consistency between the limestone consumption and the measuring results of the other factors in the performance assessment test of the desulphurization device is ensured; the method is not influenced by the conditions of the desulphurization device; and the applicability of the method is improved.
Description
Technical field
The present invention relates to the measuring method of lime stone consumption in a kind of thermal power plant " limestone-gypsum desulphurization system " Performance Assessment test.
Background technology
The lime stone consumption has provided two kinds of measuring methods as an important indicator of wet desulfurization of flue gas by limestone-gypsum method device performance examination experiment in standard DL/T998 " wet desulfurization of flue gas by limestone-gypsum method device performance acceptance test specification ": (1) measures the lime stone consumption with the measuring system (belt conveyer scale or powder position) of demarcation in service; (2) by operational factor by material balance calculation.
First method is subjected to the impact of belt conveyer scale or the accuracy of powder compartment meter larger, and the lime stone consumption deviation that draws is larger, at present less employing.Second method has only provided guidance instruction, lacks specific strategy, and operability is relatively poor, is unfavorable for carrying out test; There is larger uncertainty in operational factor owing to on-line measurement simultaneously, and the impact that is subjected to the desulfurizer status of equipment, and is not high with the lime stone fuel consumption accuracy of this calculating.Therefore be necessary to measure key element in conjunction with in the desulfurizer performances acceptance process of the test other, propose a kind of computing method of the lime stone consumption based on material balance, feasibility and the accuracy of raising lime stone consumption measurement.
Summary of the invention
In order effectively to address the above problem, the present invention proposes the measuring method of lime stone consumption in a kind of limestone-gypsum desulphurization system, and the method improves feasibility and the accuracy of lime stone consumption measurement based on material balance calculation.
The technical scheme that the present invention takes is as follows:
The measuring method of lime stone consumption in the limestone-gypsum desulphurization system comprises that step is as follows:
(1) with the method for testing of DL/T414 " thermal power plant's environmental monitoring technology standard ", tests respectively wet desulphurization device Central Plains flue gas at mark attitude, dry flue gas, O
2SO under the state of volumetric concentration 6%
2Concentration C
In, clean flue gas is at mark attitude, dry flue gas, O
2SO under the state of volumetric concentration 6%
2Concentration C
Out, and the exhaust gas volumn Q that passes through wet desulphurization device
v
(2) get the gypsum samples that produces in the wet desulphurization device after the desulfurization and analyze, measure CaSO in the gypsum samples
42H
2O, CaSO
30.5H
2O, CaCO
3Content, calculate respectively CaSO
42H
2O, CaSO
30.5H
2O, CaCO
3Mass percent, use respectively M
1, M
2, M
3Expression;
(3) calculate calcium sulfur ratio, formula is as follows:
Wherein 174,158,100 be respectively CaSO
42H
2O, CaSO
30.5H
2O, CaCO
3Molecular weight;
(4) get front used agstone sample or the lime stone of wet desulphurization device desulfurization and carry out purity analysis, measure CaCO in the lime stone
3Mass percent, use M
4Expression;
(5) calculate the consumption of limestone amount, formula is as follows:
Q wherein
vUnit is Nm
3/ h, C
In, C
OutUnit is mg/m
3, X unit is kg/h.
The measuring method of lime stone consumption has following advantage in the limestone-gypsum desulphurization system of the present invention:
The present invention has avoided direct usefulness " measuring system (belt conveyer scale or powder position) " to measure the error of bringing; The present invention can take full advantage of the measurement result of the other factors of desulfurizer Performance Assessment test, comprises flue gas SO
2Concentration, exhaust gas volumn, gypsum constituent analysis, lime stone purity analysis have been saved the measurement cost, have guaranteed the accurate of measurement result; The present invention has guaranteed the test operating mode consistance of lime stone consumption and other examination factor measurement result of desulfurizer, has reduced the adverse effect of working conditions change to the result; The present invention is not subjected to the impact of desulfurizer status of equipment, has improved the applicability of this method.
Description of drawings
Fig. 1 is measurement technological process synoptic diagram of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
In Fig. 1, the measuring method of lime stone consumption in the limestone-gypsum desulphurization system, it comprises the steps: to measure former flue gas SO
2Concentration, the clean flue gas SO of measurement
2CaCO in concentration, measurement wet desulphurization device smoke treatment amount, calculating calcium sulfur ratio, the calculating lime stone
3Mass percent, calculate the consumption of limestone amount.
The method principle is:
Test wet desulphurization device Central Plains flue gas is at mark attitude, dry flue gas, O
2SO under the state of volumetric concentration 6%
2Concentration C
In, adopt DL/T414 " thermal power plant's environmental monitoring technology standard " recommend method to measure;
Measure clean flue gas at mark attitude, dry flue gas, O
2SO under the state of volumetric concentration 6%
2Concentration C
Out, adopt DL/T414 " thermal power plant's environmental monitoring technology standard " recommend method to measure;
Measure desulfurizer smoke treatment amount Q
v, adopt the middle flue gas flow method of testing of DL/T414 " thermal power plant's environmental monitoring technology standard " to measure;
Calculate calcium sulfur ratio, the gypsum qualitt by analysis measuring device produces draws CaSO in the gypsum
42H
2O, CaSO
30.5H
2O, CaCO
3Mass percent, use respectively M
1, M
2, M
3Calcium sulfur ratio (representing with Ca/S) is calculated in expression, and formula is as follows:
Wherein 174,158,100 be respectively CaSO
42H
2O, CaSO
30.5H
2O, CaCO
3Molecular weight.The gypsum qualitt analytical approach adopts DL/T998 " wet desulfurization of flue gas by limestone-gypsum method device performance acceptance test specification " recommend method.
The lime stone sample that device is consumed carries out purity analysis, calculates CaCO
3Mass percent, use M
4Expression.The purity analysis measuring method adopts the measuring method of calcium oxide among the GB/T5762 " Methods of chemical analysis of limestone for building material industry ", CaCO
3Mass percent=calcium oxide mass percent * 100/56.
Calculate consumption of limestone amount (representing with X), formula is as follows:
Q wherein
vUnit is Nm
3/ h, C
In, C
OutUnit is mg/m
3, X unit is kg/h.
The present invention is further described below in conjunction with instantiation:
(1) under a certain operating mode of certain desulfurizer, with the method for testing of DL/T414 " thermal power plant's environmental monitoring technology standard ", records device smoke treatment amount (mark attitude, dry state, 6%O
2) Q
vBe 2191874m
3/ h, former flue gas SO
2Concentration (mark attitude, dry state, 6%O
2) C
InBe 4679mg/m
3, clean flue gas SO
2Concentration (mark attitude, dry state, 6%O
2) C
OutBe 231mg/m
3
(2) get the gypsum samples that desulfurizer produces under this operating mode and analyze CaSO
42H
2O, CaSO
30.5H
2O, CaCO
3Mass percent M
1, M
2, M
3Be respectively 90.56%, 0.84%, 1.43%.
(3) utilize formula
Calculate calcium sulfur ratio, calcium sulfur ratio numerical value is 1.027.
(4) get that the used lime stone sample of desulfurizer carries out purity analysis, CaCO in the lime stone under this operating mode
3Mass percent M
4Be 93.05%.
(5) utilize
Calculate the consumption of limestone amount, the consumption of limestone amount is 16813kg/h under a certain operating mode of certain desulfurizer.
By above-mentioned five steps, take full advantage of flue gas SO under this operating mode
2Concentration, exhaust gas volumn, gypsum constituent analysis, lime stone purity analysis test result have been finished the measurement of lime stone consumption under this operating mode of this device.
Claims (1)
1. the measuring method of lime stone consumption in the limestone-gypsum desulphurization system is characterized in that, comprises that step is as follows:
(1) with the method for testing of DL/T414 " thermal power plant's environmental monitoring technology standard ", tests respectively wet desulphurization device Central Plains flue gas at mark attitude, dry flue gas, O
2SO under the state of volumetric concentration 6%
2Concentration C
In, clean flue gas is at mark attitude, dry flue gas, O
2SO under the state of volumetric concentration 6%
2Concentration C
Out, and the exhaust gas volumn Q that passes through wet desulphurization device
v
(2) get the gypsum samples that produces in the wet desulphurization device after the desulfurization and analyze, measure CaSO in the gypsum samples
42H
2O, CaSO
30.5H
2O, CaCO
3Content, calculate respectively CaSO
42H
2O, CaSO
30.5H
2O, CaCO
3Mass percent, use respectively M
1, M
2, M
3Expression;
(3) calculate calcium sulfur ratio, formula is as follows:
Wherein 174,158,100 be respectively CaSO
42H
2O, CaSO
30.5H
2O, CaCO
3Molecular weight;
(4) get front used agstone sample or the lime stone of wet desulphurization device desulfurization and carry out purity analysis, measure CaCO in the lime stone
3Mass percent, use M
4Expression;
(5) calculate the consumption of limestone amount, formula is as follows:
Q wherein
vUnit is Nm
3/ h, C
In, C
OutUnit is mg/m
3, X unit is kg/h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546369.3A CN103018412B (en) | 2012-12-14 | 2012-12-14 | The measuring method of limestone consumption in limestone-gypsum desulphurization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546369.3A CN103018412B (en) | 2012-12-14 | 2012-12-14 | The measuring method of limestone consumption in limestone-gypsum desulphurization system |
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| CN103018412B CN103018412B (en) | 2016-08-03 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5601784A (en) * | 1994-09-09 | 1997-02-11 | Electric Power Research Institute | On-line control and monitoring system for wet lime/limestone flue gas desulfurization process |
-
2012
- 2012-12-14 CN CN201210546369.3A patent/CN103018412B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5601784A (en) * | 1994-09-09 | 1997-02-11 | Electric Power Research Institute | On-line control and monitoring system for wet lime/limestone flue gas desulfurization process |
Non-Patent Citations (5)
| Title |
|---|
| 侯鹏飞: "石灰石湿法脱硫性能指标在线监测与控制策略的优化设计", 《中国优秀硕士学位论文全文数据库》, no. 6, 15 June 2012 (2012-06-15), pages 18 - 19 * |
| 崔敏: "循环流化床锅炉燃烧系统热力计算探讨", 《电力建设》, vol. 23, no. 9, 30 September 2002 (2002-09-30), pages 8 - 12 * |
| 张远耀: "循环流化床锅炉的"脱硫"计算与问题探讨", 《中氮肥》, no. 6, 31 December 1996 (1996-12-31), pages 1 - 4 * |
| 林朝扶等: "石灰石-石膏湿法脱硫系统钙硫比测试方法", 《广西电力》, no. 2, 31 December 2006 (2006-12-31) * |
| 邢长城: "湿法脱硫中石灰石耗量的经济性分析", 《环境工程》, vol. 28, no. 4, 31 August 2010 (2010-08-31), pages 46 - 48 * |
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