CN104673428A - Coal pre-combustion desulfurizer and desulphurization method thereof - Google Patents
Coal pre-combustion desulfurizer and desulphurization method thereof Download PDFInfo
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- CN104673428A CN104673428A CN201510014908.2A CN201510014908A CN104673428A CN 104673428 A CN104673428 A CN 104673428A CN 201510014908 A CN201510014908 A CN 201510014908A CN 104673428 A CN104673428 A CN 104673428A
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Abstract
The invention relates to a coal pre-combustion desulfurizer and a desulphurization method thereof. A solid-liquid mixed desulfurizer is adopted to remove the sulfur in the coal before coal combustion, wherein the ratio of the calcium phosphate is 8-12%, the ratio of the limestone is 83-90%; the organic solvent is the ethanol in the embodiment, the weight ratio of the ethanol is 15-20%, the weight ratio of the water is 10-15%, the mol ratio of the oxygen content to the phosphorus is 4:1-4.5:1, and the volume ratio of the nitrogen to oxygen is 1:2.5-1:3. By means of grinding the coal, magnetically selecting, and performing coal pre-combustion desulfurization by the solid-liquid mixed desulfurizer, the desulfurization efficiency is high and the precision is high.
Description
Technical field
The present invention relates to sweetening agent field, particularly relate to a kind of desulfurization before coal combustion agent and sulfur method.
Background technology
The desulfurization of prior art mainly comprises desulfurization in combustion, then desulfurization, mainly comprise high temperature zinc and sweetening agent, Low Temperature Zn base desulfurizer and normal temperature zinc base desulfurizing agent, the sweetening agent of first two type needs to use at a certain temperature, need thermal source and need to consume certain energy, desulfurization also can be caused simultaneously to play katalysis, thus cause some side reactions; Compared with the sweetening agent of above-mentioned two types, the use temperature of normal temperature zinc base desulfurizing agent is lower, but exist subject matter be combustion in or or combustion after desulfurization, it carries out desulfurization after element sulphur reacts, and can not improve the quality of coal itself.
In view of above-mentioned defect, creator of the present invention obtains this creation finally through research and practice.
Summary of the invention
The object of the present invention is to provide a kind of desulfurization before coal combustion agent and sulfur method, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the invention provides a kind of desulfurization before coal combustion agent, desulfurization before coal combustion agent, is characterized in that, adopt solid-liquid mixed sweetening agent, it departs from the sulphur in coal before coal burning;
The proportion of calcium phosphate is: 8%-12%, Wingdale 83%-90%, organic reagent, is ethanol in the present embodiment, and the weight ratio of ethanol is 15%-20%; The weight ratio of water is 10%-15%; The mol ratio of oxygen content and phosphorus is 4: 1-4.5: 1, and the volume ratio of nitrogen and oxygen is 1: 2.5-1: 3.
The present invention also provides a kind of desulfurization before coal combustion method, step a, and by coal grinding after separator is separated, make the coal dust being applicable to burning, diameter is between 2-3mm;
Step b, microwave carries out pre-treatment to coal, increases pyrite magnetic in coal, and carries out force analysis in magnetometric analysis and high-gradient sorting magnetic field to the mineral in coal, utilize periodically pulsing high-gradient magnetic separation to carry out sorting to high sulphur coal;
The microwave frequency adopted is 20-25GHZ; Magneticflux-density is 1.8-1.85T, and pan feeding dynamics is-68 ~-72 orders, and pulse number is 189-198rpm;
Step c, after above-mentioned process, mixes the calcium phosphate of aforementioned proportion, Wingdale with coal, and is ground by mixture, be separated mineral substance wherein; , vaporized by ethanol according to aforementioned proportion at the temperature of 250-280 degree, with nitrogen and oxygen mix, the mixture through above-mentioned grinding mixes with mixed gas, desulfurization meanwhile.
Further, after mixed gas mixes with coal mixture, the flow velocity of mixed gas is 25-28ml/min.
Further, the proportion of sweetening agent is:
The proportion of calcium phosphate is: 8.5%, Wingdale 86.4%, and the weight ratio of ethanol is 17%; The weight ratio of water is 14%; The mol ratio of oxygen content and phosphorus is 4.25: 1, and the volume ratio of nitrogen and oxygen is 1: 2.8.
Further, microwave frequency is 20GHZ; Magneticflux-density is 1.8T, and pan feeding dynamics is-68 orders, and pulse number is 189rpm.
Beneficial effect of the present invention is compared with prior art: the present invention passes through after coal grinding, magnetic separation, and adopt solid-liquid mixed sweetening agent to carry out coal desulfurization before combustion, the efficiency of desulfurization is high, and precision is high.
Embodiment
Below, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
Sweetening agent of the present invention adopts solid-liquid mixed sweetening agent, and it departs from the sulphur in coal before coal burning, reduces the content of the sulphur in coal, improves the quality of burning.
Sweetening agent in the present invention take calcium phosphate as carrier, adds Wingdale, organic reagent and a certain proportion of oxygen, nitrogen, water.
In the present invention, the proportion of calcium phosphate is: 8%-12%, Wingdale 83%-90%, organic reagent, is ethanol in the present embodiment, and the weight ratio of ethanol is 15%-20%; The weight ratio of water is 10%-15%; The mol ratio of oxygen content and phosphorus is 4: 1-4.5: 1, and the volume ratio of nitrogen and oxygen is 1: 2.5-1: 3.
The present invention according to the sulfur method of above-mentioned sweetening agent is:
Step a, by coal grinding after separator is separated, make the coal dust being applicable to burning, diameter is between 2-3mm in the present invention;
Step b, microwave carries out pre-treatment to coal, increases pyrite magnetic in coal, and carries out force analysis in magnetometric analysis and high-gradient sorting magnetic field to the mineral in coal, utilize periodically pulsing high-gradient magnetic separation to carry out sorting to high sulphur coal;
The microwave frequency adopted in the present invention is 20-25GHZ; Magneticflux-density is 1.8-1.85T, and pan feeding dynamics is-68 ~-72 orders, and pulse number is 189-198rpm;
Step c, after above-mentioned process, mixes the calcium phosphate of aforementioned proportion, Wingdale with coal, and is ground by mixture, be separated mineral substance wherein; , vaporized by ethanol according to aforementioned proportion at the temperature of 250-280 degree, with nitrogen and oxygen mix, the mixture through above-mentioned grinding mixes with mixed gas, desulfurization meanwhile.
After mixed gas mixes with coal mixture, the flow velocity of mixed gas is 25-28ml/min.
Above-mentioned mechanism is: after grinding with microwave, magnetic separation process, the inorganic mineral in coal is fully separated with combustable organic body, and the mineral substance in mixture presents with ionic condition; When applying sweetening agent, apply the calcium phosphate of solid and Wingdale, in sweetening process, meet water or meet high temperature and can form a large amount of calcium ions, calcium ion directly combines with sulfate ion etc., formation calcium sulfate; Adding of calcium phosphate, can avoid Wingdale after high temperature, form block particle, add phosphoric wherein, under main body is the framework of calcium carbonate, through hole can be formed, so that more large-area absorption element sulphur.
Oxygen under the high temperature conditions, with the element sulphur forming section sulfurous gas in mixture; Calcium carbonate in Wingdale under the condition of heating, can also generate calcium oxide and carbonic acid gas, forms the indissoluble thing of calcium sulfite when calcium oxide and sulfurous gas react.
The steam of nitrogen and ethanol is added with in sweetening agent, from coal mixture through out-of-date, on the one hand the mineral substance of generation and coal are isolated, on the other hand, in a steam ambient, after phosphorus and Calcium-ion absorption element sulphur, form the floc sedimentation material of indissoluble, final precipitation, forms compound and the mixture of sulfur-bearing.
Especially the use of ethanol, the floc sedimentation of formation is compact, and can not too much carry trickle coal particles secretly, the precision of coal desulfurization is high.
Below by specific embodiment, above-mentioned sweetening agent and preparation method thereof is described.
Embodiment one:
Sweetening agent composition:
The proportion of calcium phosphate is: 8.5%, Wingdale 86.4%, and the weight ratio of ethanol is 17%; The weight ratio of water is 14%; The mol ratio of oxygen content and phosphorus is 4.25: 1, and the volume ratio of nitrogen and oxygen is 1: 2.8.
According to said process desulfurization;
Step a, by coal grinding after separator is separated, make the coal dust being applicable to burning, diameter is between 2-3mm;
Step b, microwave carries out pre-treatment to coal, increases pyrite magnetic in coal, and carries out force analysis in magnetometric analysis and high-gradient sorting magnetic field to the mineral in coal, utilize periodically pulsing high-gradient magnetic separation to carry out sorting to high sulphur coal;
The microwave frequency adopted in an embodiment is 20GHZ; Magneticflux-density is 1.8T, and pan feeding dynamics is-68 orders, and pulse number is 189rpm;
Step c, after above-mentioned process, mixes the calcium phosphate of aforementioned proportion, Wingdale with coal, and is ground by mixture, be separated mineral substance wherein; , vaporized by ethanol according to aforementioned proportion at the temperature of 250-280 degree, with nitrogen and oxygen mix, the mixture through above-mentioned grinding mixes with mixed gas, desulfurization meanwhile.
After mixed gas mixes with coal mixture, the flow velocity of mixed gas is 25ml/min.
Coal sulphur content before treatment is 17%, and the coal sulphur content after process is 1.3%, and desulfurization degree is 93.24%.
Embodiment two:
Sweetening agent composition:
The proportion of calcium phosphate is: 12%, Wingdale 90%, and the weight ratio of ethanol is 20%; The weight ratio of water is 10%; The mol ratio of oxygen content and phosphorus is 4: 1, and the volume ratio of nitrogen and oxygen is 1: 3.
According to said process desulfurization;
Step a, by coal grinding after separator is separated, make the coal dust being applicable to burning, diameter is between 2-3mm;
Step b, microwave carries out pre-treatment to coal, increases pyrite magnetic in coal, and carries out force analysis in magnetometric analysis and high-gradient sorting magnetic field to the mineral in coal, utilize periodically pulsing high-gradient magnetic separation to carry out sorting to high sulphur coal;
The microwave frequency adopted in an embodiment is 25GHZ; Magneticflux-density is 1.85T, and pan feeding dynamics is-72 orders, and pulse number is 198rpm;
Step c, after above-mentioned process, mixes the calcium phosphate of aforementioned proportion, Wingdale with coal, and is ground by mixture, be separated mineral substance wherein; , vaporized by ethanol according to aforementioned proportion at the temperature of 250-280 degree, with nitrogen and oxygen mix, the mixture through above-mentioned grinding mixes with mixed gas, desulfurization meanwhile.
After mixed gas mixes with coal mixture, the flow velocity of mixed gas is 28ml/min.
Coal sulphur content before treatment is 17%, and the coal sulphur content after process is 1.7%, and desulfurization degree is 92.73%.
Embodiment three:
Sweetening agent composition:
The proportion of calcium phosphate is: 8%, Wingdale 83%, and the weight ratio of ethanol is 15%; The weight ratio of water is 13%; The mol ratio of oxygen content and phosphorus is 4.5: 1, and the volume ratio of nitrogen and oxygen is 1: 2.5.
According to said process desulfurization;
Step a, by coal grinding after separator is separated, make the coal dust being applicable to burning, diameter is between 2-3mm;
Step b, microwave carries out pre-treatment to coal, increases pyrite magnetic in coal, and carries out force analysis in magnetometric analysis and high-gradient sorting magnetic field to the mineral in coal, utilize periodically pulsing high-gradient magnetic separation to carry out sorting to high sulphur coal;
The microwave frequency adopted in an embodiment is 20GHZ; Magneticflux-density is 1.81T, and pan feeding dynamics is-70 orders, and pulse number is 192rpm;
Step c, after above-mentioned process, mixes the calcium phosphate of aforementioned proportion, Wingdale with coal, and is ground by mixture, be separated mineral substance wherein; , vaporized by ethanol according to aforementioned proportion at the temperature of 250-280 degree, with nitrogen and oxygen mix, the mixture through above-mentioned grinding mixes with mixed gas, desulfurization meanwhile.
After mixed gas mixes with coal mixture, the flow velocity of mixed gas is 26.5ml/min.
Coal sulphur content before treatment is 17%, and the coal sulphur content after process is 1.65%, and desulfurization degree is 92.85%.
The foregoing is only preferred embodiment of the present invention, is only illustrative for invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes in the spirit and scope that invention claim limits to it, amendment, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (5)
1. a desulfurization before coal combustion agent, is characterized in that, adopt solid-liquid mixed sweetening agent, it departs from the sulphur in coal before coal burning;
The proportion of calcium phosphate is: 8%-12%, Wingdale 83%-90%, organic reagent, is ethanol in the present embodiment, and the weight ratio of ethanol is 15%-20%; The weight ratio of water is 10%-15%; The mol ratio of oxygen content and phosphorus is 4: 1-4.5: 1, and the volume ratio of nitrogen and oxygen is 1: 2.5-1: 3.
2. a desulfurization before coal combustion method, is characterized in that, step a, and by coal grinding after separator is separated, make the coal dust being applicable to burning, diameter is between 2-3mm;
Step b, microwave carries out pre-treatment to coal, increases pyrite magnetic in coal, and carries out force analysis in magnetometric analysis and high-gradient sorting magnetic field to the mineral in coal, utilize periodically pulsing high-gradient magnetic separation to carry out sorting to high sulphur coal;
The microwave frequency adopted is 20-25GHZ; Magneticflux-density is 1.8-1.85T, and pan feeding dynamics is-68 ~-72 orders, and pulse number is 189-198rpm;
Step c, after above-mentioned process, mixes the calcium phosphate of aforementioned proportion, Wingdale with coal, and is ground by mixture, be separated mineral substance wherein; , vaporized by ethanol according to aforementioned proportion at the temperature of 250-280 degree, with nitrogen and oxygen mix, the mixture through above-mentioned grinding mixes with mixed gas, desulfurization meanwhile.
3. desulfurization before coal combustion method according to claim 2, is characterized in that, after mixed gas mixes with coal mixture, the flow velocity of mixed gas is 25-28ml/min.
4. desulfurization before coal combustion method according to claim 3, is characterized in that, the proportion of sweetening agent is:
The proportion of calcium phosphate is: 8.5%, Wingdale 86.4%, and the weight ratio of ethanol is 17%; The weight ratio of water is 14%; The mol ratio of oxygen content and phosphorus is 4.25: 1, and the volume ratio of nitrogen and oxygen is 1: 2.8.
5. desulfurization before coal combustion method according to claim 4, is characterized in that, microwave frequency is 20GHZ; Magneticflux-density is 1.8T, and pan feeding dynamics is-68 orders, and pulse number is 189rpm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106244276A (en) * | 2016-07-29 | 2016-12-21 | 张开军 | A kind of method of ultrasonic equipment associating compound extract coal desulfurization before combustion |
| CN108676600A (en) * | 2018-04-26 | 2018-10-19 | 东南大学 | The preparation method of heavy metal arsenic and the additive for fire coal of lead release can effectively be controlled |
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| CN1385504A (en) * | 2001-05-12 | 2002-12-18 | 中国科学院山西煤炭化学研究所 | Method for desulfurization before coal combustion |
| CN103084050A (en) * | 2011-10-30 | 2013-05-08 | 湖南晟通科技集团有限公司 | Desulfurization agent |
| CN104028358A (en) * | 2014-06-16 | 2014-09-10 | 中国矿业大学 | Fine coal microwave medium intensified magnetic separation cleaning system and fine coal microwave medium intensified magnetic separation cleaning process |
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Patent Citations (3)
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| CN1385504A (en) * | 2001-05-12 | 2002-12-18 | 中国科学院山西煤炭化学研究所 | Method for desulfurization before coal combustion |
| CN103084050A (en) * | 2011-10-30 | 2013-05-08 | 湖南晟通科技集团有限公司 | Desulfurization agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106244276A (en) * | 2016-07-29 | 2016-12-21 | 张开军 | A kind of method of ultrasonic equipment associating compound extract coal desulfurization before combustion |
| CN106244276B (en) * | 2016-07-29 | 2018-12-25 | 张开军 | A kind of method of ultrasonic equipment joint compound extract coal desulfurization before combustion |
| CN108676600A (en) * | 2018-04-26 | 2018-10-19 | 东南大学 | The preparation method of heavy metal arsenic and the additive for fire coal of lead release can effectively be controlled |
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