CN104096476A - Method for using calcium-base metallurgical solid waste to lower chain grate furnace combustion sulfur dioxide emission - Google Patents
Method for using calcium-base metallurgical solid waste to lower chain grate furnace combustion sulfur dioxide emission Download PDFInfo
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- CN104096476A CN104096476A CN201410393340.5A CN201410393340A CN104096476A CN 104096476 A CN104096476 A CN 104096476A CN 201410393340 A CN201410393340 A CN 201410393340A CN 104096476 A CN104096476 A CN 104096476A
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- solid waste
- metallurgical solid
- sulfur dioxide
- furnace combustion
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Abstract
The invention discloses a method for using calcium-base metallurgical solid waste to lower chain grate furnace combustion sulfur dioxide emission and belongs to the energy conservation and environmental protection field. The method includes that finely grinding the calcium-base metallurgical solid waste, sieving, preparing into sulfur-fixing agent with more than 80% of water, mixing soluble catalyst with water to prepare into soluble liquid catalyst with 10% soluble catalyst, pressurizing and atomizing to load the sulfur-fixing agent and the soluble liquid catalyst on pulverized coal particles, wherein the water content of the loaded pulverized coal particles is less than 15%. According to the technical scheme, sulfur is removed from fire coal through loading the sulfur-fixing agent and the soluble liquid catalyst on the pulverized coal, and accordingly the self-consumption and high value-added use of the metallurgical solid waste are realized.
Description
Technical field
The invention belongs to energy-conserving and environment-protective field, specifically, relate in particular to a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions.
Background technology
In steel manufacture process, be accompanied by the generation of metallurgical solid waste, general metallurgical solid waste can be used as the industrial chemicals of construction material, refractory material and high added value, the metallurgical solid waste of the element such as calcic, magnesium can also be used as stabilizing carbon dioxide, realizes and reduces CO2 emission.
Chain furnace is a kind of grate furnace, and coal completes burning in moving process, but the actual grate-firing that belongs to of chain furnace grate firing process.Due to its stable combustion condition, the thermal efficiency is higher, and operation is convenient, and labour intensity is low, and smoke dust discharge concentration is lower.It belongs to one side ignition mode, and during operation, fuel, without self disturbance, has obvious subregion along fire grate length direction fuel bed.Therefore chain furnace is a kind of industry coal-boiler of extensive employing.Mode chain furnace combustion temperature is generally in 900 about degree, and excess oxygen coefficient is lower, therefore adds the pollutant that calcium based sulphur-fixation reagent and catalyst can efficient low control combustion produce.Coal combustion catalyst contributes to improve speed and the efficiency of burning, realizes the effect of saving coal, also can control the pollution problems such as dust in coal-fired process, solid particulate matter, sulfur dioxide.And how to improve the higher value application of metallurgical solid waste, and make smelter self solid waste of certain calcic, magnesium of dissolving, thereby utilize metallurgical solid waste to realize coal-fired desulfurization, reduce that to pollute be the major issue that metallurgy industry faces.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions, it can be by the load of sulphur-fixing agent and soluble liquid catalyst and coal dust, realize the coal desulfurization in chain furnace, and then realize self dissolving and high value added utilization of metallurgical solid waste.
The present invention is achieved by the following technical solutions:
A kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions of the present invention, first the metallurgical solid waste of calcium base after sieving, is mixed with in fine grinding to the sulphur-fixing agent of water content > 80%, then soluble catalyst and water are configured to content and are 10% soluble liquid catalyst, mode by pressurizing atomizing successively successively by sulphur-fixing agent and soluble liquid catalyst cupport to pulverized coal particle, the pulverized coal particle after load is containing water inventory < 15%.
Say further, the metallurgical solid waste of calcium base of the present invention comprises slag, carbide slag, blast furnace slag and red mud.
Say further, the load capacity of sulphur-fixing agent of the present invention is that Ca/S is 1.5～4.5.
Say further, soluble catalyst of the present invention is base metal catalysts, and the load capacity of soluble catalyst is 0.1～1%.
Say further, base metal catalysts of the present invention is selected K
2cO
3and/or Na
2cO
3.
Say further, the load capacity of sulphur-fixing agent of the present invention is that Ca/S is 2.0～3.5.
Say further, the load capacity of soluble catalyst of the present invention is 0.5～0.8%.
Compared with prior art, beneficial effect of the present invention is as follows: the present invention can realize the high value added utilization of metallurgical solid waste, help smelter self dissolve certain calcic, the solid waste of magnesium elements, by the coal particle load on the technique realizations such as grinding, slurrying and chain furnace, reduce the pollutant emission in fired coal combustion process, realize high-efficiency desulfurization, denitration, reduce the pollutant emission thing of industrial chain boiler more than 60%.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
Embodiment 1: levigating steel slag, and slurrying, on load bearing chain bar oven coal particle, Ca/S is 2.0, adds 0.5% K
2cO
3, the SO in flue gas
265%, CO decline, 50%, NO declines
xdecline 30%.
Embodiment 2: carbide slag is levigate, slurrying, and on load bearing chain bar oven coal particle, Ca/S is 2.5, adds 0.7% K
2cO
3, the SO in flue gas
275%, CO decline, 51%, NO declines
xdecline 33%.
Embodiment 3: carbide slag is levigate, slurrying, and on load bearing chain bar oven coal particle, Ca/S is 3.0, adds 0.8% K
2cO
3, the SO in flue gas
280%, CO decline, 57%, NO declines
xdecline 35%;
Embodiment 4: levigating steel slag, and slurrying, on load bearing chain bar oven coal particle, Ca/S is 2.0, adds 0.6% Na
2cO
3, the SO in flue gas
263%, CO decline, 53%, NO declines
xdecline 34%;
Embodiment 5: levigating steel slag, and slurrying, on load bearing chain bar oven coal particle, Ca/S is 1.5, adds 0.8% Na
2cO
3, the SO in flue gas
253%, CO decline, 43%, NO declines
xdecline 31%.
So-called load in the present invention, refers to material in sulphur-fixing agent or soluble catalyst and pulverized coal particle or the proportionate relationship between quality, as the load capacity of sulphur-fixing agent refers to the ratio of the S content in Ca content in sulphur-fixing agent and pulverized coal particle.The present invention adopts the metallurgical solid waste that contains calcium base, through grinding slurrying, make sulphur-fixing agent, the metallurgical solid waste slurry of calcic is determined according to the sulfur content in coal particle with the load request of coal particle, be that the Ca/S ratio described in the present invention is 1.5～4.5, coal combustion catalyst is 0.1～1%, by high-pressure atomizing device, successively two kinds of slurries are loaded to coal particle surface successively, control coal load total Water < 15%, when the coal particle after load enters into chain furnace and burns, the CO producing in flue gas
2content reduces more than 70%, and CO content reduces more than 60%, NO
xcontent reduces more than 40%.
Claims (7)
1. a method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions, it is characterized in that: the sulphur-fixing agent that first the metallurgical solid waste of calcium base is mixed with after fine grinding is sieved to water content > 80%, then soluble catalyst and water are configured to content and are 10% soluble liquid catalyst, mode by pressurizing atomizing successively successively by sulphur-fixing agent and soluble liquid catalyst cupport to pulverized coal particle, the pulverized coal particle after load is containing water inventory < 15%.
2. a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions according to claim 1, is characterized in that: the metallurgical solid waste of described calcium base comprises slag, carbide slag, blast furnace slag and red mud.
3. a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions according to claim 2, is characterized in that: the load capacity of described sulphur-fixing agent is that Ca/S is 1.5～4.5.
4. a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions according to claim 3, is characterized in that: described soluble catalyst is base metal catalysts, and the load capacity of soluble catalyst is 0.1～1%.
5. a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions according to claim 4, is characterized in that: described base metal catalysts is selected K
2cO
3and/or Na
2cO
3.
6. according to a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions described in claim 3 or 4 or 5, it is characterized in that: the load capacity of described sulphur-fixing agent is that Ca/S is 2.0～3.5.
7. according to a kind of method of utilizing the metallurgical solid waste of calcium base to reduce mode chain furnace combustion sulfur dioxide (SO2) emissions described in claim 4 or 5, it is characterized in that: the load capacity of described soluble catalyst is 0.5～0.8%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410393340.5A CN104096476A (en) | 2014-08-11 | 2014-08-11 | Method for using calcium-base metallurgical solid waste to lower chain grate furnace combustion sulfur dioxide emission |
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| CN201410393340.5A CN104096476A (en) | 2014-08-11 | 2014-08-11 | Method for using calcium-base metallurgical solid waste to lower chain grate furnace combustion sulfur dioxide emission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470787A (en) * | 2019-07-05 | 2019-11-19 | 江苏省镔鑫钢铁集团有限公司 | A kind of steel slag fine powder all iron content detection system and detection method |
| CN112762434A (en) * | 2020-12-29 | 2021-05-07 | 江苏省镔鑫钢铁集团有限公司 | Method and processing equipment for reducing emission of combustion sulfur dioxide of chain furnace by using calcium-based metallurgical solid waste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060675A (en) * | 1990-10-16 | 1992-04-29 | 史君洁 | Design method of waste slag coal-saving additive |
| CN1223294A (en) * | 1997-11-15 | 1999-07-21 | 中国科学院山西煤炭化学研究所 | Process for preparing sulfur-fixing, water-proof heneycomb briquet |
| CN102311834A (en) * | 2011-08-09 | 2012-01-11 | 圣永业（厦门）能源集团股份有限公司 | Fire coal sulfur fixation, smoke abatement and denitration agent |
-
2014
- 2014-08-11 CN CN201410393340.5A patent/CN104096476A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060675A (en) * | 1990-10-16 | 1992-04-29 | 史君洁 | Design method of waste slag coal-saving additive |
| CN1223294A (en) * | 1997-11-15 | 1999-07-21 | 中国科学院山西煤炭化学研究所 | Process for preparing sulfur-fixing, water-proof heneycomb briquet |
| CN102311834A (en) * | 2011-08-09 | 2012-01-11 | 圣永业（厦门）能源集团股份有限公司 | Fire coal sulfur fixation, smoke abatement and denitration agent |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470787A (en) * | 2019-07-05 | 2019-11-19 | 江苏省镔鑫钢铁集团有限公司 | A kind of steel slag fine powder all iron content detection system and detection method |
| CN112762434A (en) * | 2020-12-29 | 2021-05-07 | 江苏省镔鑫钢铁集团有限公司 | Method and processing equipment for reducing emission of combustion sulfur dioxide of chain furnace by using calcium-based metallurgical solid waste |
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Application publication date: 20141015 |