CN101275096B - Solid desulfuration incendiary agent for coal-burning boiler - Google Patents
Solid desulfuration incendiary agent for coal-burning boiler Download PDFInfo
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- CN101275096B CN101275096B CN2008100976102A CN200810097610A CN101275096B CN 101275096 B CN101275096 B CN 101275096B CN 2008100976102 A CN2008100976102 A CN 2008100976102A CN 200810097610 A CN200810097610 A CN 200810097610A CN 101275096 B CN101275096 B CN 101275096B
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- wollastonite
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- halite
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Abstract
The present invention provides a new type solid desulfurization incendiary agent, especially relating to a solid desulfurization incendiary agent capable of effectively reducing the air environmental pollution and solid waste of the coal-fired boiler, prepared of quick lime, wollastonite, calcium chloride, shale and halite. The solid desulfurization incendiary agent of the invention adequately enhances desulfurization efficiency of the coal-fired boiler, achieving the effects of saving coal, and reducing carbon, effectively avoiding dust pollution, the slag is directly cycled use, bringing multiple economic.
Description
Technical field:
The present invention relates to a kind of novel fixed desulfurizing combustion agent, relate in particular to a kind of fixed desulfurizing combustion agent that can effectively alleviate coal firing boiler air environmental pollution and solid gurry.
Background technology:
Topsoil is one of outstanding at present environmental problem of China, it brings serious harm to population health, cause tremendous loss to national economy, fuel-burning power plant, Industrial Boiler are the sulfur dioxide emissions sources of Chinese future maximum, it is the main reason that causes China's topsoil, although the management of China's industrial gaseous waste continues to increase, China's air pollution emission amount is decreased, the quantity discharged of main topsoil is still surprising.China has dropped into substantial contribution for the air contaminant treatment that with the coal is fuel, has also occurred a lot of good sweetening agents simultaneously.But along with the requirement of development of science and technology and policy can not have been satisfied the modern energy conservation and emission reduction and the resource reutilization strategy of sustainable development.
Coal firing boiler can produce two kinds of pollutions to environment in combustion processes, topsoil and solid gurry pollute.Topsoil contains solid dust and two kinds of pollutions of sulfurous gas; Gu polluting, gurry is mainly the flyash pollution.
70～nineties, coal firing boiler was the method widespread use of sweetening agent to add Wingdale.Desulfurization degree can reach, about 65%, simultaneously because the decomposition meeting absorption portion heat of lime carbonate causes generated energy to reduce.Institute's producing coal ash carbon content is high-quality poor in addition, can only be used for road backfill and low value-added utilization.
The principle of tradition limestone desulfurization:
(1) calcium sulfur ratio (Ca/S): the mol ratio of sulfur-bearing is called " calcium sulfur ratio " in sweetening agent institute's calcic and the coal.Used ature of coal is certain, and sulphur content also is a definite value in the coal, and Ca/S is big more, and just to represent that sweetening agent uses many more, and it is an index of expression doctor solution consumption.When temperature one timing, Ca/S is high more, and desulfurization degree is also high more.But Ca/S is high more, and the utilization ratio of limestone powder is low more, and residual CaO is more many and uneconomical.
(2) temperature of combustion: calcium sulfur ratio (Ca/S) timing, the relation of temperature and desulfurization degree.The testing data explanation optimum temps that has is 800～850 ℃, the best when test that also has then is 850～900 ℃, and temperature is low excessively, and building-up reactions is slow, and temperature is too high, and the vitriol of calcium produces thermolysis.
(3) granularity of sweetening agent and time of stopping in stove thereof: its reaction surface was little when granularity was big, and the utilization ratio of calcium is reduced; Particle diameter is too thin, then can not return the burner hearth circulation again, and reduce the utilization ratio of sweetening agent, circular fluid bed separates and revert system has guaranteed fine grain circulation, the best granularity of circulation bed desulfurization is 0.2～1.5mm for this reason, and median size generally is controlled at 0.1～0.5mm scope.SO like this
2Easily be diffused into the sweetening agent core, its reaction area increases, thereby has improved the utilization ratio of sweetening agent in the circular fluid bed.
200410049920.9 number patent application discloses a kind of technology that is used for the interior high-efficiency desulfurization of coal-fired boiler in power plant and eliminates coal ash pollution, thereby disclosed multifunction additive reaches catalysis, desulfurization and combustion-supporting effect with coal-fired the burning at furnace high-temperature.Waste residue, ferrimanganic white residue, cadmia, white residue, magnesium slag, nickel slag, chemical industry by-product sodium sulfate, calcium chloride, potassium oxide that its multifunction additive is discharged by Wingdale, unslaked lime, wollastonite, float stone, metal smelting constitute.
The defective of above patent is: do not provide raw materials used ratio, the ratio of the composition of uncontrollable additive is unfavorable for quality of production control, and effect is difficult to guarantee.
200710057165.2 number patent application discloses a kind of sweetening agent of circulating fluidized bed boiler and technology that coal ash powder prepares low heat cement of being used for, the weight percent of its sweetening agent consists of: unslaked lime 70-95%, fluorite 1-10%, cadmia 1-10%, silicomanganese scum 1-10%, titanium slag 1-10%.
The defective of above patent is: use the slag of raw material to be inconvenient to be easy to get at non-industrial area, the effect of burning after fixing is not remarkable, can't avoid producing a large amount of dust pollutions.
Summary of the invention:
The invention discloses a kind of fixed sweetening agent prescription.Mainly solve coal firing boiler in the low problem of combustion processes desulfuration efficiency, and improve the added value reutilization technology of the solid gurry flyash of coal firing boiler.SO 2 from fume can be removed more than 90%.Fixed cinder can directly participate in preparation cement in a large number.
At the shortcoming of above-mentioned sulfur removal technology, the purpose of this invention is to provide a kind of fixed desulfurizing combustion agent that can effectively alleviate coal firing boiler to air environmental pollution.
Material composition of the present invention is: unslaked lime, wollastonite, calcium chloride, shale and halite;
Its prescription is unslaked lime 60-95, wollastonite 1-8, calcium chloride 1-6, shale 1-10, halite 1-8 by weight;
Its screening formulation is unslaked lime 78-94, wollastonite 1.5-6, calcium chloride 1.5-4, shale 1.5-7, halite 1.5-5 by weight;
Material composition wherein of the present invention can also add silicomanganese scum, magnesium slag and titanium slag;
Its prescription is unslaked lime 50-90, wollastonite 1-8, calcium chloride 1-6, shale 1-10, halite 1-8, silicomanganese scum 0.5-5, magnesium slag 0.5-8, titanium slag 0.5-5 by weight;
Its screening formulation is unslaked lime 74-83, wollastonite 1.5-6, calcium chloride 1.5-4, shale 1.5-7, halite 1.5-5, silicomanganese scum 1-2, magnesium slag 1-5, titanium slag 1-2 by weight.
Described weight part can be gram, liang, kilogram, jin, ton etc.
Granularity after the described raw material pulverizing is 0.5～3mm, is good with 0.2～2mm again.
The fixed desulfurizing combustion agent of the present invention in use, the calcium sulfur ratio when coal firing boiler uses is 2～10: 1, again with 3～7: 1 is good.
Technical scheme of the present invention realizes with following method:
Wollastonite is the metasilicate mineral of calcium, is a kind of new industry raw mineral materials.Be mainly used in ceramic industry at present, secondly as metallurgical protective slag and coating, the filler that also can be used as chemical coating of welding electrode, asbestos alternative, abrasive cement, preparing glass charge and produce rubber, plastics, insulating material, paper.The batching that the wollastonite rock that has can be made building facing material or produce white cement.Material characteristic: the chemical molecular formula of wollastonite is CaSiO
3, structural formula is Ca
3(Si
3O
9), theoretical chemistry composition: CaO 48.25%, SiO
251.75%.Occurring in nature pure silicon lime stone is rare, and in its forming process, Ca is partly replaced by Fe, Mn, Ti, Sr plasma sometimes and is the isomorph body, and is mixed with a spot of Al and micro-K, Na.
Because 3 kinds of polymorphic form bodies will appear in condition differences such as the temperature when wollastonite forms, pressure: the 1. Tc type wollastonite of three oblique chain-like structures, be generally called low temperature three belite (α-CaSiO
3); 2. the ZM type parawollastonite of monocline chain-like structure, the common name parawollastonite (α '-CaSiO
3); 3. the pseudowollastonite of three oblique ternary ring texturees is generally called pseudowollastonite (β-CaSiO
3).What be widely used as the industrial mineral raw material at present mainly is low temperature three belites.Low temperature three belites are triclinic(crystalline)system, are needle-like, fibrous or sheet mostly, and normal bunch of collection is fan-shaped, radiation shape aggregate, and what have is tiny particulate state.The little band ash of white, red, vitreous luster, cleavage surface is pearliness, and cleavage is parallel medium, and two groups of cleavage surface angles of cut are 74 °.Density 2.78～2.91g/cm
3, hardness 4.5～5,1540 ℃ of fusing points.Thermal expansivity is low, and thermal expansivity is 6.5 * 10 in the time of 25～800 ℃
-6Mm/ (mm ℃); Be converted into pseudowollastonite at 1125 ℃ of left and right sides Shi Ke, at this moment thermal expansivity increases, and owing to discharge impurity such as Fe, Sr, so color becomes cream color, redness or brown by white.The wollastonite natural type has skarn type ore and wollastonite-quartz-calcite type ore two classes usually.The former mainly originates in the skarn type mineral deposit, mineral constituent complexity, skarn minerals such as normal association quartz, calcite and diopside, garnet; The latter is mainly originated in contact metasomatose and regional metamorphism type mineral deposit, and mineral constituent is simple, can be divided into again: wollastonite-quartz, wollastonite-calcite and wollastonite-quartz-3 subclass of calcite type.The structure construction of wollastonite also has two kinds usually: compact mass ore tool particulate flower hilllock metacrystal or nematoblastic texture, compact mass structure, wollastonite are tiny granular, column or fibrous agrregate, and indivedual superfine particle densification persons are beautiful shape; Coarse-grain wollastonite tool nematoblastic texture, block, seemingly dust shape, huge spot shape or banded structure, the wollastonite crystal is thick, is the sheet-pile shape, pencil or radial (chrysanthemum shape).
Wollastonite also has pharmaceutical use, can promote the calcification of bone and tooth to be shaped, and can be used for tetany, intestinal colic, ureteral colic that calcium deficiency causes.Also can be used for urticaria, itching skin disease, and rickets, richets etc.
Calcium chloride: chemical formula CaCl
22H
2O white crystal or block.782 ℃ of fusing points, 1600 ℃ of boiling points, density 2.15 gram per centimeters
3(25 ℃).The solubleness of calcium chloride in water is very big, and 100 gram water can dissolve 59.5 gram calcium chloride in the time of 0 ℃, dissolving 159 grams in the time of 100 ℃.Can form the hydrate that contains 1,2,4,6 crystal water, the temperature range that they exist is: CaCl
26H
2O is lower than 29 ℃; CaCl
24H
2O, 29～45 ℃; CaCl
22H
2O, 45～175 ℃; CaCl
2H
2O is more than 200 ℃.It also is dissolved in ethanol, generates CaCl
24C
2H
5OH with the ammonia effect, forms CaCl
28NH
3Calcium Chloride Powder Anhydrous is that siccative is used in industry and laboratory always, but can not be used for dry ethanol and ammonia.The easy deliquescence of calcium chloride can be used for watering and spills road with the dirt that disappears.CaCl
26H
2The temperature of the mixture of O and ice can reach-54.9 ℃, as refrigeration agent.It is antifreeze also to be used for cement.
Shale: the molecule that is formed by clay substance sclerosis easily splits broken, and being easy to divide becomes tangible rock stratum.Shale is a kind of of tonstein, complicated component, except that clay mineral (as kaolinite, montmorillonite, hydromica, visit stone etc.), also contain many detrital minerals (as quartz, feldspar, mica etc.) and authigenic mineral (as the oxide compound of iron, aluminium, manganese and oxyhydroxide etc.).Tool laminated or laminar bedding.Impact easy splinter with hard thing.Be after compacting effort, dehydration, recrystallization, to form by clay material.
Common type has:
1. black shale contains more organic matter.
2. yeath contains a large amount of organic matters of carbonization, is common in the roof and floor of coal measure strata.
3. resinous shale contains the pitch of some amount, and is dark brown, light tan etc., and bedding is grown, and burning has the pitch flavor.
4. siliceous shale contains more calcedony, opal etc., SiO
2Content is more than 85%.
5. irony shale contains oxide compound, oxyhydroxide of small amounts of iron etc.Take on a red color or greyish-green more.More common in red beds and coal measure strata.
6. calcareous shale contains CaCO
310-30%.
What the present invention adopted is calcareous shale.
Halite: claim rock salt again, chemical ingredients is NaCl, and crystal all belongs to the halogenide of tesseral system.Single crystal is cubes, and stepped depression is often arranged on the cubes crystal face, and aggregate often in pelletized form or block.Purified halite water white transparency is light gray, Huang, red, black isochrome, vitreous luster when impure.Three groups of cubes cleavage are complete.Mohs hardness 2.5, proportion 2.17.Soluble in water.It is salty to distinguish the flavor of.
Halite is the mineral of the typical electroless plating origin cause of formation.In salt lake or lagoon with sylvite and gypsum symbiosis.Halite can be used as food seasoning and sanitas, is important chemical material.
China's halite reserves are abundant, and it is very wide to distribute, the most famous with the Caidamu Basin, and also all there is large-scale halite deposit in Sichuan, Hubei, Jiangxi, Jiangsu.
Fixed desulfurizing combustion agent of the present invention is that above-mentioned raw materials is made after batching, pulverizing, quantitative mixing.
Effect of the present invention is:
The fixed desulfurizing combustion agent that coal firing boiler adopts, not only can reduce the endothermic process that Wingdale decomposes in stove, and solid state reaction takes place rapidly in coal and fixed desulfurizing combustion agent, new mineral have been formed, this solid state reaction is thermopositive reaction, has in time replenished the needed heat of coal combustion, makes its burning more abundant, obtain significant carbon drop effect, improved boiler combustion efficiency.Unslaked lime among the present invention not only can generate the effect that gypsum plays desulfurization with the sulfurous gas reaction, can also form Dicalcium Phosphate (Feed Grade) with the silicon dioxde reaction in the coal ash, thereby can improve the mineral composition of cinder.This reaction had both helped SO
2Absorb, can discharge a large amount of heats, reach economize on coal, effect such as the gain of heat.Make the main component SiO in the coal firing boiler lime-ash
2, Al
2O
3, Fe
2O
3, CaO and MgO and SO
2In high temperature, produce chemical reaction or mineralising reaction.Fixed incendiary material and lime-ash oxide compound are harmonious becomes the new mineral that vitriol, sulplo-aluminate and silicate minerals are formed, and forms fixed modification lime-ash.
Secondly, to be less than Wingdale far away, not only alleviate the transfer pressure of feeding system, but also reduced the mechanical wear of feeding system with the fixed desulfurizing combustion agent quality of molar equivalent.
At last, fixed desulfurizing combustion agent can be loosened and be stopped up vitriol in molecular surface and the hole in the lime-ash, increase the contact area of fixed desulfurizing combustion agent and sulfurous gas reaction, in addition, the granularity of fixed desulfurizing combustion agent just in time is fit to the burning granularity, thereby increase the surface-area that absorbs effectively, the macromole sulfuric acid salt crust of Sheng Chenging also is stripped from because constantly wear and tear in stove simultaneously, desulfurization degree can reach more than 98%, the efficient of economizing on coal can reach 8%, fly ash carbon content can reduce to 3～5% after the desulfurization, has improved the efficiency of combustion of desulfurization degree and boiler greatly.
Characteristics of the present invention:
1, realized with unslaked lime being that main raw material adds ore or industrial slag promptly can be made into fixed desulfurizing combustion agent, and raw material is easy to get all at industrial area or mountain area;
2, fixed desulfurizing combustion agent of the present invention can fully improve the desulfuration efficiency of coal firing boiler;
3, fixed desulfurizing combustion agent of the present invention reach economize on coal, the effect of carbon drop;
4, the fixed modification lime-ash of fixed desulfurizing combustion agent generation of the present invention has been avoided dust pollution;
5, the cindery directly recycle of fixed desulfurizing combustion agent generation of the present invention brings multiple economic benefit;
6, fixed sweetening agent abundant raw material of the present invention, cheap, practical range is extensive.
Embodiment:
Below prescription of the present invention is further described, but does not limit the present invention.
Embodiment 1:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 64kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite |
| Weight (kg) | 60 | 1 | 1 | 1 | 1 |
Above composition is pulverized, and the development granularity is controlled at 0.2～3.0mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in January, 2006.Boiler load factor 98%, calcium sulfur ratio 6.5 uses under boiler thermal output 99.96% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 6%.
Embodiment 2
The fixed desulfurizing combustion agent of coal firing boiler of preparation 77kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite |
| Weight (kg) | 65 | 3 | 3 | 3 | 3 |
Above composition is pulverized, and the development granularity is controlled at 0.2～3.0mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in February, 2006.Boiler load factor 98%, calcium sulfur ratio 6.8 uses under boiler thermal output 99.72% situation, and not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 5%, and realize economizing on coal 7%.
Embodiment 3:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 127kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite |
| Weight (kg) | 95 | 8 | 6 | 10 | 8 |
Above composition is pulverized, and the development granularity is controlled at 0.5～2.5mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in March, 2006.Boiler load factor 98%, calcium sulfur ratio 5.6 uses under boiler thermal output 98.86% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 6%.
Embodiment 4:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 121kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite |
| Weight (kg) | 93 | 7 | 5 | 9 | 7 |
Above composition is pulverized, and the development granularity is controlled at 0.5～2.5mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in April, 2006.Boiler load factor 98%, calcium sulfur ratio 5.2 uses under boiler thermal output 98.73% situation, and not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 5%, and realize economizing on coal 6%.
Embodiment 5:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 84kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite |
| Weight (kg) | 78 | 1.5 | 1.5 | 1.5 | 1.5 |
Above composition is pulverized, and the development granularity is controlled at 0.2～2.0mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in May, 2006.Boiler load factor 98%, calcium sulfur ratio 4.1 uses under boiler thermal output 97.95% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 5%, and realize economizing on coal 6%.
Embodiment 6:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 116kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite |
| Weight (kg) | 94 | 6 | 4 | 7 | 5 |
Above composition is pulverized, and the development granularity is controlled at 0.2～2.0mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in July, 2006.Boiler load factor 98%, calcium sulfur ratio 3.0 uses under boiler thermal output 97.55% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 6%.
Embodiment 7:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 55.5kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 50 | 1 | 1 | 1 | 1 | 0.5 | 0.5 | 0.5 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in August, 2006.Boiler load factor 98%, calcium sulfur ratio 5.0 uses under boiler thermal output 96.75% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 7%.
Embodiment 8:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 66kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 55 | 2 | 2 | 2 | 2 | 1 | 1 | 1 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in September, 2006.Boiler load factor 98%, calcium sulfur ratio 5.2 uses under boiler thermal output 95.35% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 7%.
Embodiment 9:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 81kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 60 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
The examination of preparing burden of following of the 25t/h of Wuan heat power plant fluidized-bed is burnt in October, 2006.Boiler load factor 98%, calcium sulfur ratio 4.6 uses under boiler thermal output 96.75% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent north monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 7%.
Embodiment 10:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 140kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 90 | 8 | 6 | 10 | 8 | 5 | 8 | 5 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
In January, 2007 following of the 3-4 day blue light 440t/h of power plant fluidized-bed carry out examination in 16 hours and burn, generation load 130MW boiler load factor 76～96.3%, calcium sulfur ratio 2.8 uses under boiler thermal output 99.96% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 6%.
Embodiment 11:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 126kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 85 | 7 | 5 | 8 | 7 | 4 | 6 | 4 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
In January, 2007 following of the 13-14 day blue light 440t/h of power plant fluidized-bed carry out examination in 16 hours and burn, generation load 130MW boiler load factor 76～94.5%, calcium sulfur ratio 4.5 uses under boiler thermal output 99.96% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 6%.
Embodiment 12:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 83kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 74 | 1.5 | 1.5 | 1.5 | 1.5 | 1 | 1 | 1 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
In March, 2007 following of the 5-6 day blue light 440t/h of power plant fluidized-bed carry out examination in 16 hours and burn, generation load 130MW boiler load factor 76～95.6%, calcium sulfur ratio 4.6 uses under boiler thermal output 99.95% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 6%.
Embodiment 13:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 140kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 90 | 8 | 6 | 10 | 8 | 5 | 8 | 5 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
In March, 2007 following of the 18-19 day blue light 440t/h of power plant fluidized-bed carry out examination in 16 hours and burn, generation load 130MW boiler load factor 76～95.4%, calcium sulfur ratio 3.8 uses under boiler thermal output 99.96% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 6%.
Embodiment 14:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 111kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 83 | 6 | 4 | 7 | 5 | 2 | 2 | 2 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
April in 2007 following of the 440t/h of blue light power plant on the 10th fluidized-bed carry out examination in 8 hours and burn generation load 130MW boiler load factor 86.6%, boiler thermal output 99.92%.Calcium sulfur ratio 3.6 uses under boiler thermal output 99.96% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 8%.
Embodiment 15:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 105kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 80 | 5 | 3 | 5 | 4 | 2 | 4 | 2 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
April in 2007 following of the 440t/h of blue light power plant on the 17th fluidized-bed carry out examination in 8 hours and burn generation load 130MW boiler load factor 86%, boiler thermal output 98.52%.Calcium sulfur ratio 2.5 uses under boiler thermal output 99.96% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 8%.
Embodiment 16:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 103kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 85 | 4 | 3 | 3 | 3 | 1 | 3 | 1 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
April in 2007 following of the 440t/h of blue light power plant on the 27th fluidized-bed carry out examination in 8 hours and burn generation load 130MW boiler load factor 85%, boiler thermal output 99.12%.Calcium sulfur ratio 2.7 uses under boiler thermal output 99.96% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 7%.
Embodiment 17:
The fixed desulfurizing combustion agent of coal firing boiler of preparation 103kg is an example:
| Raw material | Unslaked lime | Wollastonite | Calcium chloride | Shale | Halite | The silicomanganese scum | The magnesium slag | Titanium slag |
| Weight (kg) | 88 | 4 | 3 | 3 | 3 | 2 | 3 | 2 |
Above composition is pulverized, and the development granularity is controlled at 0.2～1.0mm and is prepared into sweetening agent.
May in 2007 following of the 440t/h of blue light power plant on the 12nd fluidized-bed carry out examination in 8 hours and burn generation load 130MW boiler load factor 90%, boiler thermal output 99.92%.Calcium sulfur ratio 4.5 uses under boiler thermal output 98.26% situation.Not dropping into the preceding sulfur in smoke mean value of sweetening agent is 2500mg/Nm
3, effluent south monitoring center of Bureau of Environmental Protection of Shanxi Province monitors the discharging flue gas, does not detect the content of sulfur dioxide in flue gas, and realizes economizing on coal 7%.
Claims (4)
1. solid desulfuration incendiary agent for coal-burning boiler, it is characterized in that described incendiary material comprises components by weight portions: unslaked lime 50-90, wollastonite 1-8, calcium chloride 1-6, calcareous shale 1-10, halite 1-8, silicomanganese scum 0.5-5, magnesium slag 0.5-8 and titanium slag 0.5-5; Calcium sulfur ratio when wherein, coal firing boiler uses is 2-10: 1.
2. the described fixed desulfurizing combustion agent of claim 1 is characterized in that described incendiary material comprises components by weight portions: unslaked lime 74-83, wollastonite 1.5-6, calcium chloride 1.5-4, calcareous shale 1.5-7, halite 1.5-5, silicomanganese scum 1-2, magnesium slag 1-5 and titanium slag 1-2.
3. claim 1 or 2 described fixed desulfurizing combustion agent is characterized in that the granularity after the described raw material pulverizing is 0.5～3mm.
4. the using method of the described fixed desulfurizing combustion agent of claim 1 is characterized in that the calcium sulfur ratio when coal firing boiler uses is 3-7: 1.
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| CN106582252B (en) * | 2016-12-21 | 2020-04-24 | 贵州大学 | Flue gas desulfurization and mercury removal agent and preparation method thereof |
| CN112546827A (en) * | 2020-11-19 | 2021-03-26 | 衢州科尔钙业科技有限公司 | Composite desulfurizer and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110713A (en) * | 1995-03-25 | 1995-10-25 | 柳州市东风化工厂 | Mixed sweetening agent |
| CN1354230A (en) * | 2000-11-22 | 2002-06-19 | 中国科学院大连化学物理研究所 | Natural mineral fuel coal sulphur-fixing agent |
| CN1660977A (en) * | 2004-06-18 | 2005-08-31 | 侯岛 | High performance desulfurization and eliminating pollution of fly ash inside coal burning boiler in electric power plant |
| CN101091867A (en) * | 2007-04-18 | 2007-12-26 | 天津城市建设学院 | Technique for desulfurization in high efficiency for circulating fluidized bed boiler, and for preparing low-heat cement from fly ash |
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2008
- 2008-05-21 CN CN2008100976102A patent/CN101275096B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110713A (en) * | 1995-03-25 | 1995-10-25 | 柳州市东风化工厂 | Mixed sweetening agent |
| CN1354230A (en) * | 2000-11-22 | 2002-06-19 | 中国科学院大连化学物理研究所 | Natural mineral fuel coal sulphur-fixing agent |
| CN1660977A (en) * | 2004-06-18 | 2005-08-31 | 侯岛 | High performance desulfurization and eliminating pollution of fly ash inside coal burning boiler in electric power plant |
| CN101091867A (en) * | 2007-04-18 | 2007-12-26 | 天津城市建设学院 | Technique for desulfurization in high efficiency for circulating fluidized bed boiler, and for preparing low-heat cement from fly ash |
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