CN101819122A - Method and device for measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash - Google Patents
Method and device for measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash Download PDFInfo
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- CN101819122A CN101819122A CN 201010146929 CN201010146929A CN101819122A CN 101819122 A CN101819122 A CN 101819122A CN 201010146929 CN201010146929 CN 201010146929 CN 201010146929 A CN201010146929 A CN 201010146929A CN 101819122 A CN101819122 A CN 101819122A
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- heating
- circulating fluid
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 title claims abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 15
- 230000023556 desulfurization Effects 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000004380 ashing Methods 0.000 claims abstract description 7
- 239000011261 inert gas Substances 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 230000005587 bubbling Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 5
- 238000005303 weighing Methods 0.000 abstract description 4
- 150000004649 carbonic acid derivatives Chemical group 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 238000003303 reheating Methods 0.000 abstract 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 13
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 12
- 239000000428 dust Substances 0.000 description 9
- 239000001175 calcium sulphate Substances 0.000 description 6
- 235000011132 calcium sulphate Nutrition 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 4
- 235000010261 calcium sulphite Nutrition 0.000 description 4
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
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Abstract
The invention relates to a method and a device for measuring the content of combustible carbon in circulating fluid bed boiler desulfurization flying ash. The method comprises the following steps of: firstly, placing a sample of circulating fluid bed boiler flying ash in a heat preservation and heating furnace, heating to 715-735 DEG C, introducing inertial gas in the heating process, preserving the temperature for 0.5-1.0 hr, stopping heating, and taking the sample out to be weighed after cooling; replacing the sample into the heating furnace, introducing air, reheating to 715-735 DEG C, preserving the temperature for 0.5-1.0 hr, slowly ashing the sample, weighing again when the sample is cooled to room temperature to obtain the ignition loss of the combustible carbon in the sample. The ratio of the ignition loss to the original mass of the sample is the mass percent content of the combustible carbon. By adopting the heating device which can control gas atmosphere, the process can realize that the sample is heated in different atmospheres and the error caused by the decomposition of carbonates can be eliminated, sulfates and other components, and thus, the real content of the combustible carbon in the circulating fluid bed boiler flying ash can be accurately measured.
Description
Technical field
The present invention relates to a kind of technology of measuring the flying dust content of combustible carbon, particularly a kind of process and equipment of measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash.The present invention can be applicable to power industry.
Background technology
Content of combustible carbon in the boiler fly ash has determined its range of application in others such as building materials.Usually characterize the size of flyash content of combustible carbon with loss on ignition, the flying dust of high content of combustible carbon can only landfill and the stacking mode handle, improved the cost of power production, reduced economic benefit and caused to a certain degree environmental pollution.
The mensuration of China's boiler ash content of combustible carbon adopts the loss on ignition method at present, promptly takes by weighing the sample that flies back of certain mass, makes it 815 ± 10 ℃ of slow ashing down, according to the Mass Calculation content of combustible carbon (method A) wherein of its minimizing; And when needs accurate Calculation thermal parameter, need measure flying dust air-dried moisture and ash content according to related request, and the carbonate carbon dioxide content, total loss on ignition deducts moisture and carbonate carbon dioxide content in the flying dust, is the content (method B) of flammable carbon in the flying dust.The concrete operations step can be with reference to power industry standard DL/T 567.6-1995.
Circulating Fluidized Bed Boiler has been added desulfurizing agent usually in stove, so the composition of Circulating Fluidized Bed Boiler flying dust and traditional coal powder boiler flying ash composition are very different, and often contain multiple materials such as calcium oxide, lime carbonate, calcium hydroxide, calcium sulphate, calcium sulfite in the lime-ash.If adopt traditional loss on ignition method, the decomposition of these materials in heating process is bigger to the mensuration influence of flammable carbon, has caused measuring error to a certain degree.
Summary of the invention
At the limitation of said determination method, the present invention proposes a kind of technology and device that is used for measuring the circulating fluid bed boiler desulfurization flying ash content of combustible carbon, makes it can accurately measure the real content of the flammable carbon in the Circulating Fluidized Bed Boiler flying dust.
The technical solution adopted in the present invention is:
A kind of method of measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash is characterized in that this method comprises the steps:
1) the circulating fluid bed boiler desulfurization flying ash sample is put into the insulation heating furnace, sample is heated to 715～735 ℃, in heating process, feed inert gas simultaneously, be incubated 0.5～1.0 hour, then stop heating;
2) continue to feed inert gas, make temperature drop to room temperature, take out sample and weigh, then sample is reentered in the heating arrangement bubbling air, reheat to 715～735 ℃, be incubated 1.0～1.5 hours, make the slow ashing of sample, stop heating, after sample is reduced to room temperature, weigh once more, weigh for twice of poor quality be exactly content of combustible carbon in the sample.
In the technique scheme, described inert gas preferably adopts nitrogen.
The present invention also provides a kind of device of measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash, it is characterized in that: this device comprises the insulation heating furnace, heating and attemperating unit and air transporting arrangement, be provided with exhausr port at described insulation heating furnace top, be provided with gas feed in insulation heating furnace bottom, in the insulation heating furnace, be provided with heat-resisting orifice plate and temperature sensor, described temperature sensor is connected with heating and attemperating unit, described air transporting arrangement comprises airflow pipe, inert gas conveyance conduit and the flowmeter that is respectively applied for control air and inert gas flow.
The present invention compared with prior art has the following advantages and the high-lighting effect: adopt type of heating twice, promptly at first adopt in inert atmosphere sample is heated to 715～735 ℃, can effectively avoid flammable carbon ashing in the sample, and make lime carbonate, calcium sulfite, calcium hydroxide and water of crystallization in the sample decompose, guarantee that simultaneously calcium sulphate is not decomposed; And then sample is put into air be heated to 715-735 ℃, make the slow ashing of sample, guarantee that simultaneously calcium sulphate does not decompose in the sample podzolic process, thereby the loss on ignition when making the sample ashing is exactly the real content of flammable carbon in the sample, thereby effectively overcome traditional loss on ignition measuring error that method causes.
Description of drawings
Fig. 1 is the structural representation of measurement content of combustible carbon in circulating fluid bed boiler desulfurization flying ash device provided by the invention.
Among Fig. 1: 1-is incubated heating furnace; 2-heating and attemperating unit; 3.-gas feed; The 4-exhausr port; The 5-temperature sensor; The heat-resisting orifice plate of 6-; The 7-flowmeter; The 8-airflow pipe; 9-inert gas conveyance conduit.
Embodiment
Below in conjunction with accompanying drawing structure of the present invention, mechanism and the course of work are further described:
Fig. 1 is the structural representation of measurement content of combustible carbon in circulating fluid bed boiler desulfurization flying ash device provided by the invention.This device mainly comprises insulation heating furnace 1, heating and attemperating unit 2 and air transporting arrangement, be provided with exhausr port 4 at described insulation heating furnace top, be provided with gas feed 3 in insulation heating furnace bottom, in the insulation heating furnace, be provided with heat-resisting orifice plate 6 and temperature sensor 5, described temperature sensor 5 is connected with heating and attemperating unit 2, described air transporting arrangement comprises airflow pipe 8, inert gas conveyance conduit 9 and the flowmeter 7 that is respectively applied for control air and inert gas flow.
When utilizing device shown in Figure 1 to measure, at first in insulation heating furnace 1, feed inert gas by inert gas conveyance conduit 9, and be that the sample of w is put on the heat-resisting orifice plate 6 of insulation heating furnace with weight, begin to be heated to 715～735 ℃ from room temperature, kept this temperature 0.5～1 hour, stop heating, make free water and water of crystallization in the sample slough, calcium hydroxide, lime carbonate, components such as calcium sulfite are fully decomposed, simultaneously under this temperature, calcium sulphate can't decompose, and continues to feed inert gas, cools the temperature to room temperature, take by weighing the sample of this moment rapidly, obtain weight w
1, once more sample is put into the insulation heating furnace, bubbling air is heated to 715～735 ℃ from room temperature once more, is incubated 1～1.5 hour, is cooled to room temperature then, takes by weighing sample once more and obtains weight w
2, in this process, because temperature is no more than the decomposition temperature of calcium sulphate, calcium sulphate can not be decomposed, and the loss on ignition w of sample in this process
1-w
2Be exactly flammable carbon loss on ignition in the sample, carbon loss on ignition that this is flammable and the ratio of sample proper mass are the quality percentage composition of flammable carbon in the sample.
The quality percentage composition of then flammable carbon in sample is (w
1-w
2)/w.
Embodiment:, the content of combustible carbon of the circulating fluid bed boiler desulfurization flying ash of four kinds of typical coals of burning is measured according to method A, method B and the method for the present invention of power industry standard regulation.Inert gas adopts nitrogen, and every kind of coal all is heated to 715 ℃, 725 ℃ and 735 ℃ respectively, and temperature retention time is at 1.5 hours, 1.2 hours and 1 hour, result following (% of unit):
Find out that from the result method that the present invention proposes has been avoided the measuring error of decomposition of components such as sulphate decomposition in the flying dust sample and calcium hydroxide, lime carbonate, calcium sulfite, can accurately measure the real content of the flammable carbon in the Circulating Fluidized Bed Boiler flying dust.
Claims (3)
1. a method of measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash is characterized in that this method comprises the steps:
1) the circulating fluid bed boiler desulfurization flying ash sample is put into the insulation heating furnace, sample is heated to 715～735 ℃, in heating process, feed inert gas simultaneously, be incubated 0.5～1.0 hour, then stop heating;
2) continue to feed inert gas, make temperature drop to room temperature, take out sample and weigh, then sample is reentered in the heating arrangement, bubbling air, reheat to 715～735 ℃, be incubated 1.0～1.5 hours, make the slow ashing of sample, stop heating, after sample is reduced to room temperature, weigh once more, weigh for twice of poor quality be exactly flammable carbon loss on ignition in the sample, this loss on ignition and the ratio of sample proper mass are the quality percentage composition of flammable carbon in the sample.
2. according to the described a kind of method of measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash of claim 1, it is characterized in that: described inert gas adopts nitrogen.
3. realize a kind of device of measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash of method according to claim 1, it is characterized in that: this device comprises insulation heating furnace (1), heating and attemperating unit (2) and air transporting arrangement, be provided with exhausr port (4) at described insulation heating furnace top, be provided with gas feed (3) in insulation heating furnace bottom, in the insulation heating furnace, be provided with heat-resisting orifice plate (6) and temperature sensor (5), described temperature sensor (5) is connected with heating and attemperating unit (2), described air transporting arrangement comprises airflow pipe (8), inert gas conveyance conduit (9) and the flowmeter (7) that is respectively applied for control air and inert gas flow.
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| CN 201010146929 CN101819122A (en) | 2010-04-14 | 2010-04-14 | Method and device for measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash |
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| CN 201010146929 CN101819122A (en) | 2010-04-14 | 2010-04-14 | Method and device for measuring content of combustible carbon in circulating fluid bed boiler desulfurization flying ash |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466575A (en) * | 2010-11-08 | 2012-05-23 | 上海宝钢工业检测公司 | Method for measuring carbon content in inhalable particles in air |
| CN103712881A (en) * | 2013-12-26 | 2014-04-09 | 中国人民解放军军事医学科学院卫生装备研究所 | Gram-grade material thermo-gravimetry and gas production property research experimental apparatus |
| CN104777069A (en) * | 2015-03-17 | 2015-07-15 | 浙江理工大学 | Powdery substance processing device |
| CN104819909A (en) * | 2015-03-17 | 2015-08-05 | 浙江理工大学 | Equipment for metering medicinal powder heating mass loss rate |
| CN104990830A (en) * | 2015-06-19 | 2015-10-21 | 武汉钢铁(集团)公司 | Method and device for measuring effect on billet surface oxidation from furnace inside atmosphere of heating furnace |
| CN106801865A (en) * | 2016-12-26 | 2017-06-06 | 浙江春晖环保能源股份有限公司 | Recirculating fluidized bed tail gas lime-ash recycle device |
| WO2018121517A1 (en) * | 2016-12-27 | 2018-07-05 | 中国科学院工程热物理研究所 | Method for measuring combustible carbon content of boiler ash |
| WO2018218571A1 (en) * | 2017-06-01 | 2018-12-06 | 深圳市能源环保有限公司 | Method for testing loss on ignition of household waste incinerator slag |
| CN113155665A (en) * | 2020-01-07 | 2021-07-23 | 国家能源投资集团有限责任公司 | Method for testing content of elemental carbon and application thereof |
| CN113390753A (en) * | 2021-06-15 | 2021-09-14 | 广西电网有限责任公司电力科学研究院 | Method for testing content of combustible in limestone wet desulphurization slurry solid |
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Cited By (14)
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| CN102466575B (en) * | 2010-11-08 | 2015-09-16 | 上海宝钢工业检测公司 | The assay method of carbon element content in Inhalable Particulate |
| CN102466575A (en) * | 2010-11-08 | 2012-05-23 | 上海宝钢工业检测公司 | Method for measuring carbon content in inhalable particles in air |
| CN103712881A (en) * | 2013-12-26 | 2014-04-09 | 中国人民解放军军事医学科学院卫生装备研究所 | Gram-grade material thermo-gravimetry and gas production property research experimental apparatus |
| CN103712881B (en) * | 2013-12-26 | 2016-07-06 | 中国人民解放军军事医学科学院卫生装备研究所 | A kind of gram level material thermogravimetric and biogas production characteristics research experiment device |
| CN104819909A (en) * | 2015-03-17 | 2015-08-05 | 浙江理工大学 | Equipment for metering medicinal powder heating mass loss rate |
| CN104777069A (en) * | 2015-03-17 | 2015-07-15 | 浙江理工大学 | Powdery substance processing device |
| CN104990830A (en) * | 2015-06-19 | 2015-10-21 | 武汉钢铁(集团)公司 | Method and device for measuring effect on billet surface oxidation from furnace inside atmosphere of heating furnace |
| CN106801865A (en) * | 2016-12-26 | 2017-06-06 | 浙江春晖环保能源股份有限公司 | Recirculating fluidized bed tail gas lime-ash recycle device |
| CN106801865B (en) * | 2016-12-26 | 2019-01-08 | 浙江春晖环保能源股份有限公司 | Recirculating fluidized bed tail gas lime-ash recycle device |
| WO2018121517A1 (en) * | 2016-12-27 | 2018-07-05 | 中国科学院工程热物理研究所 | Method for measuring combustible carbon content of boiler ash |
| WO2018218571A1 (en) * | 2017-06-01 | 2018-12-06 | 深圳市能源环保有限公司 | Method for testing loss on ignition of household waste incinerator slag |
| CN113155665A (en) * | 2020-01-07 | 2021-07-23 | 国家能源投资集团有限责任公司 | Method for testing content of elemental carbon and application thereof |
| CN113390753A (en) * | 2021-06-15 | 2021-09-14 | 广西电网有限责任公司电力科学研究院 | Method for testing content of combustible in limestone wet desulphurization slurry solid |
| CN113390753B (en) * | 2021-06-15 | 2022-11-22 | 广西电网有限责任公司电力科学研究院 | Method for testing content of combustible in limestone wet desulphurization slurry solid |
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