CN102041131B - High-temperature sulfur solidifying agent for desulfurization in coal blending burner - Google Patents
High-temperature sulfur solidifying agent for desulfurization in coal blending burner Download PDFInfo
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- CN102041131B CN102041131B CN 201110023814 CN201110023814A CN102041131B CN 102041131 B CN102041131 B CN 102041131B CN 201110023814 CN201110023814 CN 201110023814 CN 201110023814 A CN201110023814 A CN 201110023814A CN 102041131 B CN102041131 B CN 102041131B
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Abstract
The invention discloses a high-temperature sulfur solidifying agent for desulfurization in a coal blending burner, relating to a sulfur solidifying agent for reducing emission of SO2 of fire coal. The high-temperature sulfur solidifying agent comprises the following raw materials in percentage by weight: 38-42% of calcium oxide, 9-12% of silicon dioxide, 3-5% of sodium carbonate, 6-8% of magnesium oxide, 7-9% of iron sesquioxide, 11-13% of aluminium oxide, 4-5% of titanium dioxide, 2-3% of sodium lignin sulfonate, 2-3% of potassium oxide, 3-5% of vanadium pentoxide and 4-6% of silicon carbide. By utilizing the high-temperature sulfur solidifying agent, the desulfurization efficiency is greatly improved, 80% of SO2 of the fire coal can be solidified, the load of flue gas desulfurization at the later stage is greatly reduced; after desulfurization, a boiler leads the discharged powdery coal ash and slag at the bottom of the boiler are ground into cement fineness so as to lead the compression strength to reach more than 16.0Mpa for 28 days, the burning of the fire coal is fuller, the residual carbon amount of the discharged powdery coal ash is reduced, the heat efficiency of the boiler is improved, and simultaneously the coking problem brought by the fire coal of the coal firing boiler is solved.
Description
Technical field
The present invention relates to the coal-fired SO of a kind of minimizing
2The sweetening agent of discharging, specifically a kind of high-temperature sulfur solidifying agent for desulfurization in coal blending burner.
Background technology
Environment protection is paid close attention to by the whole world day by day.China SO
2Year discharging quantity is large, and acid rain has covered area 40% left and right, how to reduce and to control SO
2Pollution become particularly urgent and important.Because China's energy structure is take coal as main, most coals are used for burning, reduce and control SO
2Pollution, will manage to reduce the SO in the coal burning process
2Quantity discharged.Desulfurization before burning in Desulfurization Technique for Coal-fired Boilers now, i.e. coal washing technology by coal washing, is removed the sulfur in fire coal, reaches the Filter Tuber For Clean Coal burning, reduces SO
2The purpose of discharging.But this coal washing technology can't remove by physical method due to particulate dispersed pyrite and organosulfur, so sweetening effectiveness is poor.The tail flue gas desulfurization, though desulfurization degree is high, the installations and facilities of its disposable input are taken, annual running cost and equipment maintenance cost too high, therefore non-general power plant can bear, and especially uses the power plant of the medium small boiler of fire coal or low grade coal, is difficult for applying.Coal mixing combustion sulphur-fixing agent desulfurization technology namely adopts the coal mixing combustion sulphur-fixing agent evenly to mix with coal-fired, enters boiler and carries out combustion desulfurization, and this desulfurization technology cost is low, drop into without installations and facilities.But existing sulphur-fixing agent sweetening effectiveness is still undesirable.
Summary of the invention
Technical problem to be solved by this invention is to provide the high high-temperature sulfur solidifying agent for desulfurization in coal blending burner of a kind of desulfuration efficiency.
the present invention solves the problems of the technologies described above the technical scheme that adopts to be: high-temperature sulfur solidifying agent for desulfurization in coal blending burner, by calcium oxide, silicon-dioxide, sodium carbonate, magnesium oxide, ferric oxide, aluminium sesquioxide, titanium dioxide, sodium lignosulfonate, potassium oxide, Vanadium Pentoxide in FLAKES and silicon carbide form, the weight percent of each raw material add-on is: calcium oxide 38-42%, silicon-dioxide 9-12%, sodium carbonate 3-5%, magnesium oxide 6-8%, ferric oxide 7-9%, aluminium sesquioxide 11-13%, titanium dioxide 4-5%, sodium lignosulfonate 2-3%, potassium oxide 2-3%, Vanadium Pentoxide in FLAKES 3-5%, silicon carbide 4-6%.
The granularity of described silicon-dioxide is 3-6 μ m.
The invention has the beneficial effects as follows: significantly improved desulfuration efficiency after using high-temperature desulfurization agent of the present invention, can be the SO of 80% in fire coal
2Be fixed up, greatly alleviate the burden of later stage flue gas desulfurization, make the SO in coal-fired flue-gas
2Concentration reaches the emission standard of national regulation.After desulfurization, boiler institute discharge coal ash, bottom slag are worn into more than 28 days ultimate compression strength of cement fineness reaches 16.0Mpa.The existence of high-temperature desulfurization agent has reduced the decomposition temperature of coal ash, and significantly reduced and decomposed the heat that absorbs, fire coal is more fully burnt, reduced the remaining carbon of institute's discharge coal ash, improve boiler thermal output, solved simultaneously the coking problem that the coal firing boiler fire coal brings.
Embodiment
High-temperature sulfur solidifying agent for desulfurization in coal blending burner, be comprised of calcium oxide, silicon-dioxide, sodium carbonate, magnesium oxide, ferric oxide, aluminium sesquioxide, titanium dioxide, sodium lignosulfonate, potassium oxide, Vanadium Pentoxide in FLAKES and silicon carbide, the weight percent of each raw material add-on is: calcium oxide 38-42%, silicon-dioxide 9-12%, sodium carbonate 3-5%, magnesium oxide 6-8%, ferric oxide 7-9%, aluminium sesquioxide 11-13%, titanium dioxide 4-5%, sodium lignosulfonate 2-3%, potassium oxide 2-3%, Vanadium Pentoxide in FLAKES 3-5%, silicon carbide 4-6%.
The granularity of described silicon-dioxide is 3-6 μ m.
The using method of high-temperature sulfur solidifying agent for desulfurization in coal blending burner of the present invention is: high-temperature desulfurization agent of the present invention adopts the desulfuration in furnace method of coal mixing combustion, high-temperature desulfurization agent of the present invention is sent into boiler with coal-fired weight ratio according to 1:4-2:3 after even the mixing burn, the larger sweetening effectiveness of the add-on of high-temperature desulfurization agent is better but cost is also higher.Oxide compound in combustion processes in sulphur-fixing agent has combustion-supporting effect to coal, and its point of ignition will significantly reduce, and improves the utilization ratio of coal, and the catalytic materials in sulphur-fixing agent has katalysis to coal, can make that coal burns in combustion processes fast and thoroughly.
Embodiment 1
The silicon carbide of getting by weight percentage 38% calcium oxide, 12% silicon-dioxide, 3% sodium carbonate, 7% magnesium oxide, 9% ferric oxide, 13% aluminium sesquioxide, 4% titanium dioxide, 2% sodium lignosulfonate, 3% potassium oxide, 5% Vanadium Pentoxide in FLAKES and 4% mixes and makes high-temperature sulfur solidifying agent for desulfurization in coal blending burner, and wherein the granularity of silicon-dioxide is 3 μ m.
After tested, on coal-fired boiler in power plant by coal: the propellant combination of the high-temperature desulfurization agent=80:20 proportioning operation 72h that burns simultaneously, wherein coal-fired sulphur content is 0.392%, thus the SO of conversion
2Quantity discharged is 43.36 Kg/h, and actual emission is 6.70 Kg/h, and desulfurization degree is 84.5%.28 days ultimate compression strength of boiler institute ash discharge slag are 16.0MPa.
Embodiment 2
The silicon carbide of getting by weight percentage 39% calcium oxide, 10% silicon-dioxide, 4% sodium carbonate, 8% magnesium oxide, 8% ferric oxide, 12% aluminium sesquioxide, 5% titanium dioxide, 3% sodium lignosulfonate, 2% potassium oxide, 4% Vanadium Pentoxide in FLAKES and 5% mixes and makes high-temperature sulfur solidifying agent for desulfurization in coal blending burner, and wherein the granularity of silicon-dioxide is 5 μ m.
After tested, on coal-fired boiler in power plant by coal: the propellant combination of the high-temperature desulfurization agent=70:30 proportioning operation 72h that burns simultaneously, wherein coal-fired sulphur content is 0.343%, thus the SO of conversion
2Quantity discharged is 45.28 Kg/h, and actual emission is 4.30 Kg/h, and desulfurization degree is 90.5%.28 days ultimate compression strength of boiler institute ash discharge slag are 16.8MPa.
Embodiment 3
The silicon carbide of getting by weight percentage 42% calcium oxide, 9% silicon-dioxide, 5% sodium carbonate, 6% magnesium oxide, 7% ferric oxide, 11% aluminium sesquioxide, 5% titanium dioxide, 3% sodium lignosulfonate, 3% potassium oxide, 3% Vanadium Pentoxide in FLAKES and 6% mixes and makes high-temperature sulfur solidifying agent for desulfurization in coal blending burner, and wherein the granularity of silicon-dioxide is 6 μ m.
After tested, on coal-fired boiler in power plant by coal: the propellant combination of the high-temperature desulfurization agent=60:40 proportioning operation 72h that burns simultaneously, wherein coal-fired sulphur content is 2.65%, thus the SO of conversion
2Quantity discharged is 381.60 Kg/h, and actual emission is 0.88 Kg/h, and desulfurization degree is 99.8%.28 days ultimate compression strength of boiler institute ash discharge slag are 18.1MPa.
This shows the SO that high-temperature desulfurization agent that component and ratio according to technical solution of the present invention make can effectively reduce when coal mixing combustion
2Quantity discharged.SiO in sulphur-fixing agent
2, Fe
2O
3, Ai
2O
3Can promote coal-fired activation products Deng element, they can be by the fracture of chemical bond, obtaining the gaseous matter of more molecular weight, thereby has reduced activation energy, has also just reduced the ignition of coal temperature, makes the more complete of coal burning.The materials such as sodium carbonate, potassium oxide, sodium lignosulfonate and Vanadium Pentoxide in FLAKES can promote SO in combustion processes
2Reaction generates CaSO
4, MgSO
4Deng material, improve the utilization ratio of reaction efficiency and calcium atom, thereby with most of SO
2Be fixed up.Also generate more stable multi-element compounds CaFe in reaction process
3(SiO
4)
2OH, 3CaO3Al
2O
3CaSO
4Cover or be wrapped in CaSO
4The outside forms vitreum state material, thereby delays and stoped CaSO
4Decomposition, improved desulfurization efficiency.After desulfurization, boiler institute discharge coal ash, bottom slag are worn into more than 28 days ultimate compression strength of cement fineness reaches 16.0Mpa, can all be converted into the high quality raw material of cement building material industry, and utility value improves.Fire coal is more fully burnt, reduced the remaining carbon of institute's discharge coal ash, improve boiler thermal output, solve simultaneously the coking problem that the coal firing boiler fire coal brings.
Claims (2)
1. high-temperature sulfur solidifying agent for desulfurization in coal blending burner, it is characterized in that: by calcium oxide, silicon-dioxide, sodium carbonate, magnesium oxide, ferric oxide, aluminium sesquioxide, titanium dioxide, sodium lignosulfonate, potassium oxide, Vanadium Pentoxide in FLAKES and silicon carbide form, the weight percent of each raw material add-on is: calcium oxide 38-42%, silicon-dioxide 9-12%, sodium carbonate 3-5%, magnesium oxide 6-8%, ferric oxide 7-9%, aluminium sesquioxide 11-13%, titanium dioxide 4-5%, sodium lignosulfonate 2-3%, potassium oxide 2-3%, Vanadium Pentoxide in FLAKES 3-5%, silicon carbide 4-6%.
2. high-temperature sulfur solidifying agent for desulfurization in coal blending burner as claimed in claim 1, it is characterized in that: the granularity of described silicon-dioxide is 3-6 μ m.
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| CN 201110023814 CN102041131B (en) | 2011-01-21 | 2011-01-21 | High-temperature sulfur solidifying agent for desulfurization in coal blending burner |
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| CN 201110023814 CN102041131B (en) | 2011-01-21 | 2011-01-21 | High-temperature sulfur solidifying agent for desulfurization in coal blending burner |
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| CN102041131B true CN102041131B (en) | 2013-06-26 |
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| CN102533391B (en) * | 2012-02-16 | 2014-06-25 | 华北电力大学 | Novel iron-based oxygen carrier with interlayer shell structure, and preparation method for novel iron-based oxygen carrier |
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| CN106925114A (en) * | 2017-03-14 | 2017-07-07 | 湖南云平环保科技有限公司 | Desulfuration in furnace agent and preparation method thereof |
| CN107099355A (en) * | 2017-04-21 | 2017-08-29 | 雷笑天 | A kind of preparation method of coal sulphur-fixing agent |
| CN107057796A (en) * | 2017-06-09 | 2017-08-18 | 太原理工大学 | A kind of high-temperature fixed sulfur additive and its preparation method and application |
| CN112029553A (en) * | 2020-09-01 | 2020-12-04 | 山东魏桥铝电有限公司 | Compound removal agent for sulfur, arsenic and fluorine, and preparation method and application thereof |
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