CN101921643A - Method for improving fusion temperature of coal ash by utilizing limestone as additive - Google Patents
Method for improving fusion temperature of coal ash by utilizing limestone as additive Download PDFInfo
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- CN101921643A CN101921643A CN2010102423106A CN201010242310A CN101921643A CN 101921643 A CN101921643 A CN 101921643A CN 2010102423106 A CN2010102423106 A CN 2010102423106A CN 201010242310 A CN201010242310 A CN 201010242310A CN 101921643 A CN101921643 A CN 101921643A
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- coal ash
- sample
- temperature
- coal
- wingdale
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- 239000010883 coal ash Substances 0.000 title claims abstract description 98
- 239000000654 additive Substances 0.000 title claims abstract description 33
- 230000000996 additive effect Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000004927 fusion Effects 0.000 title abstract description 10
- 235000019738 Limestone Nutrition 0.000 title abstract 5
- 239000006028 limestone Substances 0.000 title abstract 5
- 239000003245 coal Substances 0.000 claims abstract description 40
- 239000010117 shenhua Substances 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 238000004380 ashing Methods 0.000 claims description 9
- 238000004166 bioassay Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 239000002956 ash Substances 0.000 abstract 7
- 238000005054 agglomeration Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 abstract 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 7
- 235000011164 potassium chloride Nutrition 0.000 description 7
- 239000001103 potassium chloride Substances 0.000 description 7
- 159000000000 sodium salts Chemical class 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The invention relates to a method for improving the fusion temperature of coal ash by utilizing limestone as an additive, comprising the following steps of: 1 sampling in required raw material coal to obtain a coal sample, grinding the coal sample to be less than 60 meshes and then incinerating to obtain a standard coal ash sample; 2 measuring the ash fusion temperature of the standard coal ash sample; 3 uniformly mixing the standard coal ash sample and the limestone in the mass ratio of 99:1 into a mixture, measuring the ash fusion temperature of the coal ash sample to be measured, and comparing the ash fusion temperature of the coal ash sample to be measured with the ash measured fusion temperature of the standard coal ash sample in the step 2; 4 increasing the mass ratio of the limestone by 2% higher than the mass ratio in the step 3, measuring the ash fusion temperature of the coal ash sample to be measured, and comparing the ash fusion temperature of the coal ash sample to be measured with the measured ash fusion temperature of the coal ash sample in the step 3; and 5 determining the mass ratio range of the limestone as the additive. The method can reduce the slag agglomeration of boilers burning Shenhua coal and has no corrosive action for metal parts on the boilers.
Description
Technical field
The present invention relates to a kind of method that improves coal ash melting temperature, particularly relate to a kind of method of utilizing Wingdale to improve coal ash melting temperature as additive.
Background technology
Reserves reach more than 2,200 hundred million tons Firing Shenhua Coal, and to exist grey melt temperature low, easy slagging scorification when causing burning, even the accident that can cause boiler explosion takes place, and influences safe operation of the boiler.For fear of the Firing Shenhua Coal slagging scorification, adopt coal blending to improve the Firing Shenhua Coal ash fusion point at present, but Shenhua coal blending resource-constrained, coal blending simultaneously also can influence harbour shipment efficient, adopt the additive that reduces Firing Shenhua Coal slagging scorification in boiler operatiopn for this reason, more and more become the main method that improves the Shenhua coal ash melting temperature.
Also do not improve the method for Shenhua coal ash melting temperature at present at the special additive of Firing Shenhua Coal, the additive that uses Firing Shenhua Coal is still based on sodium salt and sylvite, but, in practice, sodium salt and sylvite there is no raising to the Shenhua coal ash melting temperature, and, because the no determinacy of dosage, even the situation generation that the Shenhua coal ash melting temperature is reduced, the major cause that causes this situation is CaO and Fe in the Firing Shenhua Coal ash component
2O
3Content is higher, and sodium salt and sylvite are applicable to CaO and Fe
2O
3The coal of other that content is low, sodium salt and sylvite also have the corrosive nature to metal parts on the boiler in addition, have equally also constituted the factor to the dangerous operation of boiler.
Summary of the invention
The objective of the invention is to, overcome the defective of above-mentioned prior art and a kind of method of utilizing Wingdale to improve the Shenhua coal ash melting temperature is provided, determine to reach the purpose of the scope that improves Firing Shenhua Coal ash fusibility temperature by the ratio of progressively in the Shenhua coal ash, adding Wingdale, thereby alleviate the slagging scorification of the boiler that uses Firing Shenhua Coal, Wingdale does not have corrosive nature to metal parts on the boiler in addition, has eliminated the factor of the corrosive nature of sodium salt and sylvite to the dangerous operation of boiler.
For achieving the above object, the present invention takes following design:
A kind of method of utilizing Wingdale to improve coal ash melting temperature as additive, described method comprises the steps: step 1: sampling obtains coal sample in needing the feed coal of additive, and carry out ashing after grinding this coal sample below 60 orders, obtain the standard coal ash sample; Step 2: the grey melt temperature of bioassay standard coal ash sample promptly obtains coal ash texturing temperature, coal ash softening temperature, coal ash hemispherical temperature and coal ash yield temperature; Step 3: with standard coal sample and Wingdale according to 99: 1 ratio uniform mixing resulting mixture of mass ratio, carry out ashing after grinding this mixture below 60 orders, obtain containing the coal ash sample to be measured of Wingdale additive, measure the grey melt temperature of this coal ash sample to be measured, and and step 2 in the grey melt temperature of the standard coal ash sample measured compare; Step 4: according to the method for step 3, the mass ratio of Wingdale is increased by 2% than step 3, and carry out ashing after grinding corresponding mixture below 60 orders, measure the grey melt temperature of this coal ash sample to be measured then, and and step 3 in the grey melt temperature of the coal ash sample measured compare; Step 5: if the mean value that double grey melt temperature increases below 30 ℃, is determined between the minimum value and maximum value of mass ratio range for the mass ratio of this twice corresponding Wingdale that is relatively added of Wingdale additive; If the mean value that double grey melt temperature increases is greater than 30 ℃, repeated execution of steps 4.
Preferably, in described step 3, the grey melt temperature that mensuration is contained the coal ash sample of measuring in the grey melt temperature of coal ash sample of Wingdale additive and the step 2 compares item by item, coal ash texturing temperature, coal ash softening temperature, coal ash hemispherical temperature and the coal ash yield temperature that is about to measure respectively in step 2 and the step 3 carried out correspondence relatively, and try to achieve the difference of each temperature, difference is obtained the mean value that grey melt temperature increases divided by 4.
More preferably, adding mass ratio range in feed coal is that the Wingdale of 5-9% is as additive.
Advantage of the present invention is: because the purpose of determining to reach raising Firing Shenhua Coal ash fusibility temperature by the ratio of progressively adding Wingdale in the Shenhua coal ash of the present invention, thereby alleviate the slagging scorification of the boiler that uses Firing Shenhua Coal, Wingdale does not have corrosive nature to metal parts on the boiler in addition, has eliminated the factor of the corrosive nature of sodium salt and sylvite to the dangerous operation of boiler.
Embodiment
The present invention will be described in more detail below in conjunction with embodiment.
Present embodiment utilizes Wingdale to improve the method for Shenhua coal ash melting temperature, and step is as follows:
Step 1: sampling obtains Firing Shenhua Coal sample 20 gram in needing the Firing Shenhua Coal of additive, and carries out ashing after this Firing Shenhua Coal sample ground 55 orders, obtains the Firing Shenhua Coal ash sample;
Step 2: measure the grey melt temperature of Firing Shenhua Coal ash sample, promptly obtain coal ash texturing temperature, coal ash softening temperature, coal ash hemispherical temperature and coal ash yield temperature;
The grey melt temperature of the Firing Shenhua Coal ash sample that record this moment is as shown in table 1:
| The coal ash texturing temperature | The coal ash softening temperature | The coal ash hemispherical temperature | The coal ash yield temperature | |
| The standard coal ash sample | 1100℃ | 1120℃ | 1130℃ | 1130℃ |
Table 1
Step 3: sampling obtains Firing Shenhua Coal sample 20 grams in Firing Shenhua Coal, with Firing Shenhua Coal sample and Wingdale according to 99: 1 ratio uniform mixing resulting mixture of mass ratio, carry out ashing after this mixture ground 55 orders, obtain the Firing Shenhua Coal ash sample of Wingdale additive, measure the grey melt temperature that this has the Firing Shenhua Coal ash sample of Wingdale additive, and and step 2 in the grey melt temperature of the Firing Shenhua Coal ash sample measured compare item by item, the coal ash texturing temperature of measuring in promptly corresponding comparison and the step 2, the coal ash softening temperature, coal ash hemispherical temperature and coal ash yield temperature are tried to achieve its difference, and difference obtains the mean value that grey melt temperature increases divided by 4;
The grey melt temperature of the Firing Shenhua Coal ash sample that record this moment is as shown in table 2, and the mean value that grey melt temperature increases is 50 ℃:
Table 2
Step 4: sampling obtains Firing Shenhua Coal sample 20 grams in Firing Shenhua Coal, with Firing Shenhua Coal sample and Wingdale uniform mixing resulting mixture, wherein the mass ratio of Wingdale increases by 2% than step 3, carry out ashing after this mixture ground 55 orders, obtain the Firing Shenhua Coal ash sample of Wingdale additive, measure the grey melt temperature that this has the Firing Shenhua Coal ash sample of Wingdale additive, and and the grey melt temperature measured last time compare item by item, promptly relatively corresponding and measured last time coal ash texturing temperature, the coal ash softening temperature, coal ash hemispherical temperature and coal ash yield temperature are tried to achieve its difference, and difference obtains the mean value that grey melt temperature increases divided by 4;
Step 5: if the mean value that double grey melt temperature increases is below 30 ℃, need to determine between the minimum value and maximum value of mass ratio range for the mass ratio of this twice corresponding Wingdale that is relatively added of the Wingdale additive in the Firing Shenhua Coal of additive, the mass ratio range of the Wingdale additive in the Firing Shenhua Coal of ultimate demand additive is 5-9%, present embodiment is chosen the mass ratio 8% of a Wingdale in this value range, carries out uniform mixing according to the mass ratio and the Firing Shenhua Coal of this Wingdale of choosing; If the mean value that double grey melt temperature increases is greater than 30 ℃, repeated execution of steps 4.
The grey melt temperature of each time interpolation this moment Wingdale additive gained is as shown in table 3, and the mass ratio of Shenhua coal ash and Wingdale is 97: 3 o'clock, and the mean value that grey melt temperature increases is 67.5 ℃; The mass ratio of Shenhua coal ash and Wingdale is 95: 5 o'clock, and the mean value that grey melt temperature increases is 150 ℃; The mass ratio of Shenhua coal ash and Wingdale is 93: 7 o'clock, and the mean value that grey melt temperature increases is 5 ℃; The mass ratio of Shenhua coal ash and Wingdale is 91: 9 o'clock, and the mean value that grey melt temperature increases is 2.5 ℃.
Table 3
Need among this embodiment determining the mass ratio range of the Wingdale additive in the Firing Shenhua Coal of additive thus is 5-9%, choose the mass ratio 8% of a Wingdale in this value range, mass ratio and Firing Shenhua Coal according to this Wingdale of choosing are carried out uniform mixing, so just determine to reach the purpose of the scope that improves Firing Shenhua Coal ash fusibility temperature by the ratio of progressively in the Shenhua coal ash, adding Wingdale, thereby alleviate the slagging scorification of the boiler that uses Firing Shenhua Coal, Wingdale does not have corrosive nature to metal parts on the boiler in addition, has eliminated the factor of the corrosive nature of sodium salt and sylvite to the dangerous operation of boiler.
Obviously, those of ordinary skill in the art can improve the method for coal ash melting temperature as additive with a kind of Wingdale that utilizes of the present invention, constitutes the method for various types of raising coal ash melting temperatures.
The foregoing description is only for the usefulness that the present invention is described; and be not to be limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also should belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (3)
1. one kind is utilized Wingdale to improve the method for coal ash melting temperature as additive, and it is characterized in that: described method comprises the steps:
Step 1: sampling obtains coal sample in needing the feed coal of additive, and carries out ashing after grinding this coal sample below 60 orders, obtains the standard coal ash sample;
Step 2: the grey melt temperature of bioassay standard coal ash sample promptly obtains coal ash texturing temperature, coal ash softening temperature, coal ash hemispherical temperature and coal ash yield temperature;
Step 3: with standard coal sample and Wingdale according to 99: 1 ratio uniform mixing resulting mixture of mass ratio, carry out ashing after grinding this mixture below 60 orders, obtain containing the coal ash sample to be measured of Wingdale additive, measure the grey melt temperature of this coal ash sample to be measured, and and step 2 in the grey melt temperature of the standard coal ash sample measured compare;
Step 4: according to the method for step 3, the mass ratio of Wingdale is increased by 2% than step 3, and carry out ashing after grinding corresponding mixture below 60 orders, measure the grey melt temperature of this coal ash sample to be measured then, and and step 3 in the grey melt temperature of the coal ash sample measured compare;
Step 5: if the mean value that double grey melt temperature increases below 30 ℃, is determined between the minimum value and maximum value of mass ratio range for the mass ratio of this twice corresponding Wingdale that is relatively added of Wingdale additive; If the mean value that double grey melt temperature increases is greater than 30 ℃, repeated execution of steps 4.
2. the method for raising according to claim 1 Shenhua coal ash melting temperature, it is characterized in that: in described step 3, the grey melt temperature that mensuration is contained the coal ash sample of measuring in the grey melt temperature of coal ash sample of Wingdale additive and the step 2 compares item by item, coal ash texturing temperature, coal ash softening temperature, coal ash hemispherical temperature and the coal ash yield temperature that is about to measure respectively in step 2 and the step 3 carried out correspondence relatively, and try to achieve the difference of each temperature, difference is obtained the mean value that grey melt temperature increases divided by 4.
3. the method for raising according to claim 2 Shenhua coal ash melting temperature is characterized in that: the Wingdale that adds mass ratio range and be 5-9% in feed coal is as additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010242310 CN101921643B (en) | 2010-07-30 | 2010-07-30 | Method for improving fusion temperature of coal ash by utilizing limestone as additive |
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|---|---|---|---|
| CN 201010242310 CN101921643B (en) | 2010-07-30 | 2010-07-30 | Method for improving fusion temperature of coal ash by utilizing limestone as additive |
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| CN101921643A true CN101921643A (en) | 2010-12-22 |
| CN101921643B CN101921643B (en) | 2013-01-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238427A (en) * | 2015-09-30 | 2016-01-13 | 西安交通大学 | Coal blending method for reducing clinkering property of Zhundong coal |
| CN106383062A (en) * | 2016-08-26 | 2017-02-08 | 巨石集团有限公司 | Method for evaluating mineral raw materials |
| CN117120581A (en) * | 2021-11-04 | 2023-11-24 | 太阳焦炭科技和发展有限责任公司 | Cast coke products and related systems, devices, and methods |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4002741A1 (en) * | 1990-01-31 | 1991-08-01 | Rwe Energie Ag | System for operating coal fired power station plant - in which slurry from system is fed into furnace with coal to lower ash fusion point |
| CN1105698A (en) * | 1994-01-20 | 1995-07-26 | 李小江 | Slag removing agent for solid fuel boiler |
| CN101531942A (en) * | 2009-04-27 | 2009-09-16 | 华北电力大学（保定） | Additive having functions of combustion supporting of coal, desulphurizing and denitrifying and preparation method |
| CN101773709A (en) * | 2009-12-25 | 2010-07-14 | 沈阳航空工业学院 | Universal method for fixing heavy metal in incineration fly ash by adjusting CaO/SiO2 |
-
2010
- 2010-07-30 CN CN 201010242310 patent/CN101921643B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4002741A1 (en) * | 1990-01-31 | 1991-08-01 | Rwe Energie Ag | System for operating coal fired power station plant - in which slurry from system is fed into furnace with coal to lower ash fusion point |
| CN1105698A (en) * | 1994-01-20 | 1995-07-26 | 李小江 | Slag removing agent for solid fuel boiler |
| CN101531942A (en) * | 2009-04-27 | 2009-09-16 | 华北电力大学（保定） | Additive having functions of combustion supporting of coal, desulphurizing and denitrifying and preparation method |
| CN101773709A (en) * | 2009-12-25 | 2010-07-14 | 沈阳航空工业学院 | Universal method for fixing heavy metal in incineration fly ash by adjusting CaO/SiO2 |
Non-Patent Citations (1)
| Title |
|---|
| 叶巧明等: "提高石灰石掺量增加粉煤灰活性的研究", 《成都理工学院学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238427A (en) * | 2015-09-30 | 2016-01-13 | 西安交通大学 | Coal blending method for reducing clinkering property of Zhundong coal |
| CN105238427B (en) * | 2015-09-30 | 2018-03-16 | 西安交通大学 | A kind of blending method for reducing accurate eastern coal slagging properties |
| CN106383062A (en) * | 2016-08-26 | 2017-02-08 | 巨石集团有限公司 | Method for evaluating mineral raw materials |
| CN117120581A (en) * | 2021-11-04 | 2023-11-24 | 太阳焦炭科技和发展有限责任公司 | Cast coke products and related systems, devices, and methods |
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| CN101921643B (en) | 2013-01-02 |
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