CN104001412B - Fume desulfurizing agent and fume desulphurization method thereof - Google Patents
Fume desulfurizing agent and fume desulphurization method thereof Download PDFInfo
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Abstract
The invention discloses a kind of fume desulfurizing agent and fume desulphurization method thereof.Represent with weight percentage, fume desulfurizing agent is made up of red mud 10 ~ 80%, aluminium ash 5 ~ 50%, flyash 5 ~ 70% and useless carbon dust 5 ~ 30%.First take various raw material according to raw material proportion of composing, mix, obtain mixed material; Mixed material is pressed into prism, in the middle of prism, is provided with gas passage; Prism is assembled in desulphurization plant, and desulphurization plant is connected with flue, and the flue gas produced in flue passes into desulphurization plant and fully contacts with desulfurizing agent, carries out desulfurization; After measured, the gas after desulfurization meets discharging standards, discharges.Present invention utilizes red mud, flyash, aluminium ash and useless carbon dust characteristic separately, mixed as desulfurizing agent, effectively can remove the sulfur dioxide in flue gas, desulfurization degree reaches more than 90%.The treatment of wastes with processes of wastes against one another of the present invention, desulphurization cost is low, and sulfur dioxide removal rate is high, is beneficial to industrialization and amplifies.
Description
Technical field
The present invention relates to a kind of flue gas desulfurization technique, particularly relate to and a kind ofly take industrial solid castoff as fume desulfurizing agent and utilize this desulfurizing agent to carry out the method for desulfurization, namely the present invention relates to a kind of fume desulfurizing agent and fume desulphurization method thereof.
Background technology
Sulfur dioxide in flue gas endangers huge to animals and plants and ecological environment, the particularly sulfur dioxide of low concentration, and because its flue gas content is large, harness effect is low, so its effective improvement becomes a great problem for a long time.Administer SO in the world at present
2the technical way polluted is flue gas desulfurization, various countries research, exploitation and use flue gas desulfurization technique more than kind more than 200, wherein industrialized about have kind more than 20, desulfurization is main in a wet process, its principle is mostly the sulfur dioxide absorbed with alkaline absorbent in flue gas, as lime/lime stone/gypsum, ammonia process etc.Also SO in report flue gas is had
2administering method be by sulfur dioxide wherein for the production of sulfuric acid, but the SO that different smelting modes produces
2the concentration of flue gas is different, as SO in flue gas
2concentration is too low and generally adopt the mode of alkali liquor absorption to process when being not suitable for system acid system.Traditional alkali liquor absorption method is: the liquid caustic soda of high concentration is mixed with the sig water being applicable to the low concentration absorbed, the sig water prepared is added absorption cycle groove, top, absorption tower is evacuated to through pump, under through shower nozzle spray, realize the absorption of alkali lye to metallurgical sulphur dioxide with flue gas during smelting counter current contacting.Absorbing liquid absorbs at tower Inner eycle always, when absorption reaches terminal (pH=5 ~ 6), needs to stop absorbing, is discharged by saturated absorption liquid, then again prepare alkali lye and carry out cyclic absorption again.
Chinese patent 201010568240.3 reports a kind of method and the device that remove low-concentration sulfur dioxide in flue gas, the method take citric acid-sodium citrate buffer as absorbing liquid, rotary packed bed is absorption reactor thermally, step is: open rotary packed bed, absorbing liquid and enter rotary packed bed containing the flue gas of sulfur dioxide, liquid phase and gas phase carry out contacting reacting, and reacted liquid phase enters desorption system desorb.Device comprises rotary packed bed, and rotary packed bed gas feed connects originates containing the flue gas of sulfur dioxide, and rotary packed bed liquid-inlet connects absorbing liquid source, and rotary packed bed liquid outlet connects desorption system.Inventive desulfurization efficiency is high, and absorbing liquid is renewable, flexibly for acid making system or production sulphur etc., and can the device reduces equipment scaling, blocking, be conducive to the desorption efficiency improving absorption efficiency and absorb rich solution, reduce investment and operating cost.
Chinese patent 200510042884.8 discloses a kind of method and apparatus removing SO 2 in waste gas, and this invention adopts the SO in citrate solution washing removing waste gas
2.Chinese patent 200580015036.6 discloses a kind of SO adopting hydrogenperoxide steam generator to wash removing
2method.Chinese patent 200580020973.0 reports a kind of minimizing fluidized-bed combustion boiler SO
2the method of discharge.
Chinese patent 201010241676.1 discloses a kind of method for processing sulfur dioxide smelting fumes, relates to a kind of low-concentration sulfur dioxide flue gas during smelting continuous absorption method.It is characterized in that equipment that its processing procedure is arranged comprises absorption tower, tail gas absorber, alkali-prepared tank, balance pipe between absorption tower and tail gas absorber, the chain control valve of circulating pump, pH, Liquid level interlocking valve; Balance pipe between absorption tower and tail gas absorber, with the gradient, is convenient to alkali lye and is flowed into absorption tower from tail gas absorber, and absorption tower and tail gas absorber respectively configure a circulating pump respectively, carry out the continus convergence of absorbing liquid; The discharging automatic valve circulating line on absorption tower being arranged a pH meter and absorption tower is interlocked; The charging automatic valve that absorption cycle groove arranges a liquid level gauge and tail gas absorber is interlocked.Method automaticity of the present invention is higher, decreases charging complicated in absorption process and the time of discharging, greatly accelerates absorption operation speed, alleviate labour intensity.
Chinese patent 201310242498.8 discloses a kind of method of boiler flue gas desulfurization denitration, cancel ammonia dissolving tank and ammoniacal liquor dilution system, condensed liquid in urea preparing process does not need process directly fill into desulfurizing tower or spray into boiler, not only save desulfuring and denitrifying apparatus operating cost more than 80%, make desulfuring and denitrifying apparatus profitability significantly increase, process deposed ammonia expense can be reduced again; Meet environment protection emission requirement, ensure sulfur dioxide in flue gas and nitrogen oxide qualified discharge.
The problems such as the absorption equipment of above-mentioned existing technique is in the majority with tower, there is equipment volume huge, and floor space is large, and operating cost is high, and desulfurization afterproduct cannot effectively process; And during alkali desulphurization, alkali lye consumption is large, desulphurization cost is high, the ammonia process of desulfurization extensively adopted all adopts gas ammonia as absorbent, gas ammonia cost accounts for whole plant running cost about 80%, its byproduct ammonium sulfate is worth not high, and cause most of desulfurizer to be lost money and run, enterprise's enthusiasm is not high.
Summary of the invention
The technical problem to be solved in the present invention is: for above existing desulfur technology Problems existing and deficiency, the invention provides and a kind ofly take industrial solid castoff as fume desulfurizing agent and utilize this desulfurizing agent to carry out the method for desulfurization, namely the invention provides a kind of fume desulfurizing agent and fume desulphurization method thereof.The technical solution of the present invention treatment of wastes with processes of wastes against one another, turns waste into wealth, and desulphurization cost is low, and sulfur dioxide removal rate is high, is beneficial to industrialization and amplifies.
In order to solve the problem, the technical solution used in the present invention is:
The invention provides a kind of fume desulfurizing agent, represent with weight percentage, described fume desulfurizing agent is made up of red mud 10 ~ 80%, aluminium ash 5 ~ 50%, flyash 5 ~ 70% and useless carbon dust 5 ~ 30%.
According to above-mentioned fume desulfurizing agent, described fume desulfurizing agent is made up of red mud 30 ~ 50%, aluminium ash 10 ~ 30%, flyash 20 ~ 40% and useless carbon dust 10 ~ 20%.
According to above-mentioned fume desulfurizing agent, described red mud be alumina producing discharge containing offscum in alkali, represent with mass percent, its main chemical compositions and content thereof are calcium oxide 6 ~ 50%, sodium oxide molybdena 2 ~ 10%, aluminium oxide 5 ~ 20%, iron oxide 5 ~ 50% and silica 3 ~ 25%, the basicity of wastewater from red mud is 3000 ~ 15000mg/L; The active ingredient participating in desulfurization in red mud is calcium oxide, sodium oxide molybdena, aluminium oxide and iron oxide.
According to above-mentioned fume desulfurizing agent, described aluminium ash is electrolytic aluminium ash or founding aluminium ash, and represent with mass percent, its main chemical compositions and content thereof are aluminium oxide 30 ~ 60%, silica 3 ~ 6%, sodium oxide molybdena 1 ~ 3%, calcium oxide 1 ~ 3% and magnesia 2 ~ 3%; The active ingredient participating in desulfurization in aluminium ash is aluminium oxide, sodium oxide molybdena, calcium oxide and magnesia.
According to above-mentioned fume desulfurizing agent, described flyash is the residue after coal combustion, represents with mass percent, and its main chemical compositions and content thereof are silica 30 ~ 60%, aluminium oxide 15 ~ 40%, iron oxide 2 ~ 6%, calcium oxide 1 ~ 10% and magnesia 1 ~ 4%; The active ingredient participating in desulfurization in flyash is aluminium oxide, iron oxide, calcium oxide and magnesia.
According to above-mentioned fume desulfurizing agent, described useless carbon dust is the useless carbon dust containing alkaline matter, and the mass percentage shared by its alkaline matter is 10 ~ 60%, and the active ingredient participating in desulfurization in useless carbon dust is alkaline matter.
Utilize above-mentioned fume desulfurizing agent to carry out a method for flue gas desulfurization, said method comprising the steps of:
A, first take various raw material according to the ratio of above-mentioned fume desulfurizing agent, the various raw materials taken are mixed, obtains mixed material;
B, the mixed material obtained by step a are pressed into prism, and be provided with gas passage in the middle of the prism be pressed into, the volume of gas passage accounts for 30 ~ 60% of prism volume;
C, the prism assembling of being made by step b are filled in desulphurization plant, desulphurization plant two ends are provided with blast fence (baffle plate is for delaying the flow velocity of flue gas), desulphurization plant is connected with flue, the flue gas produced in flue passes into desulphurization plant and fully contacts with desulfurizing agent, carries out desulfurization; After measured, the gas after desulfurization meets discharging standards, discharges.
According to the above-mentioned method utilizing fume desulfurizing agent to carry out flue gas desulfurization, prism described in step b is cylinder, square, positive three prism, positive hexagonal prism or cuboid; The prism be pressed into is not broken when 1 meter of height freely falling body.
According to the above-mentioned method utilizing fume desulfurizing agent to carry out flue gas desulfurization, gas passage described in step b is the through hole be provided with along prism short transverse, and its cross section is circular or polygon.
positive beneficial effect of the present invention:
1, the technical solution of the present invention treatment of wastes with processes of wastes against one another, turns waste into wealth, and desulphurization cost is low, and sulfur dioxide removal rate is high, is beneficial to industrialization and amplifies.
2, technical solution of the present invention takes full advantage of red mud, flyash, aluminium ash and useless carbon dust characteristic separately, and mixed as desulfurizing agent, effectively can remove the sulfur dioxide in flue gas, desulfurization degree reaches more than 90%.
3, because red mud has rich alkalescence, the present invention it can be used as SO
2the desulfurizing agent of waste gas and absorbent, both can solve ecological environment problem, can realize again the recycling of trade waste, has significant social effect and economic benefit.
4, red mud is the discarded object that alumina producing is discharged, and the annual aluminium oxide output of current China about 4,000 ten thousand tons discharges red mud about 1.5 hundred million tons; The utilization rate of current red mud, less than 10%, is mainly stored up, and takies large area soil, not only causes the waste in soil, the more important thing is alkalization around with soil and the water source of underground, cause the pollution to air, soil and water, be unfavorable for environmental protection; The utilization of the present invention to red mud has significant economic benefit and social benefit.
detailed description of the invention:
Set forth the present invention further below in conjunction with embodiment, but do not limit content of the present invention.
The red mud adopted in following examples be alumina producing discharge containing offscum in alkali, represent with mass percent, its main chemical compositions and content thereof are calcium oxide 6 ~ 50%, sodium oxide molybdena 2 ~ 10%, aluminium oxide 5 ~ 20%, iron oxide 5 ~ 50%, silica 3 ~ 25%, the basicity of wastewater from red mud is 3000 ~ 15000mg/L; The active ingredient participating in desulfurization in red mud is calcium oxide, sodium oxide molybdena, aluminium oxide and iron oxide;
Aluminium ash is electrolytic aluminium ash or founding aluminium ash, and represent with mass percent, its main chemical compositions and content thereof are aluminium oxide 30 ~ 60%, silica 3 ~ 6%, sodium oxide molybdena 1 ~ 3%, calcium oxide 1 ~ 3%, magnesia 2 ~ 3%; The active ingredient participating in desulfurization in aluminium ash is aluminium oxide, sodium oxide molybdena, calcium oxide and magnesia;
Flyash is the residue after coal combustion, represents with mass percent, and its main chemical compositions and content thereof are silica 30 ~ 60%, aluminium oxide 15 ~ 40%, iron oxide 2 ~ 6%, calcium oxide 1 ~ 10%, magnesia 1 ~ 4%; The active ingredient participating in desulfurization in flyash is aluminium oxide, iron oxide, calcium oxide and magnesia;
Useless carbon dust is the useless carbon dust containing alkaline matter, and its alkaline matter mass percentage is 10 ~ 60%, and the active ingredient participating in desulfurization in useless carbon dust is alkaline matter.
Embodiment 1:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 10%, aluminium ash 15%, flyash 70% and useless carbon dust 5%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step of the method is:
A, first take red mud, aluminium ash, flyash and useless carbon dust according to the ratio of fume desulfurizing agent, the various raw materials taken are mixed, obtains mixed material;
B, the mixed material obtained by step a are pressed into the cylinder of high 300mm, diameter 200mm, are provided with through hole and gas passage in cylinder along short transverse, and through hole cross section is square, and the square length of side is 10mm; The volume of through hole and gas passage accounts for 40% of prism volume;
C, the cylinder made by step b are assembled in desulphurization plant, desulphurization plant two ends are provided with blast fence (baffle plate is for delaying the flow velocity of flue gas), desulphurization plant is connected with flue, the flue gas produced in flue passes into desulphurization plant and fully contacts with desulfurizing agent, carries out desulfurization; After measured, SO in flue gas
2initial concentration is 2500mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 185mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Embodiment 2:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 40%, aluminium ash 50%, flyash 5% and useless carbon dust 5%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step of the method is:
A, first take red mud, aluminium ash, flyash and useless carbon dust according to the ratio of fume desulfurizing agent, the various raw materials taken are mixed, obtains mixed material;
B, the mixed material obtained by step a are pressed into the four-prism of high 220mm, length of side 180mm, are provided with through hole and gas passage in four-prism along short transverse, and through hole cross section is circular, Circularhole diameter 12mm; The volume of through hole and gas passage accounts for 50% of prism volume;
C, the four-prism made by step b are assembled in desulphurization plant, desulphurization plant two ends are provided with blast fence (baffle plate is for delaying the flow velocity of flue gas), desulphurization plant is connected with flue, the flue gas produced in flue passes into desulphurization plant and fully contacts with desulfurizing agent, carries out desulfurization; After measured, SO in flue gas
2initial concentration is 4000mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 163mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Embodiment 3:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 80%, aluminium ash 5%, flyash 5% and useless carbon dust 10%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step of the method is:
A, first take red mud, aluminium ash, flyash and useless carbon dust according to the ratio of fume desulfurizing agent, the various raw materials taken are mixed, obtains mixed material;
B, the mixed material obtained by step a are pressed into the positive three prism of high 200mm, length of side 150mm, and be provided with through hole and gas passage along short transverse in positive three prism, through hole cross section is regular hexagon, regular hexagon length of side 8mm; The volume of through hole and gas passage accounts for 60% of prism volume;
C, the positive three prism made by step b are assembled in desulphurization plant, desulphurization plant two ends are provided with blast fence (baffle plate is for delaying the flow velocity of flue gas), desulphurization plant is connected with flue, the flue gas produced in flue passes into desulphurization plant and fully contacts with desulfurizing agent, carries out desulfurization; After measured, SO in flue gas
2initial concentration is 7500mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 106mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Embodiment 4:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 20%, aluminium ash 20%, flyash 30% and useless carbon dust 30%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step of the method is:
A, first take red mud, aluminium ash, flyash and useless carbon dust according to the ratio of fume desulfurizing agent, the various raw materials taken are mixed, obtains mixed material;
B, the mixed material obtained by step a are pressed into the cylinder of high 260mm, diameter 180mm, and be provided with through hole and gas passage along short transverse in cylinder, through hole cross section is equilateral triangle, equilateral triangle length of side 15mm; The volume of through hole and gas passage accounts for 30% of prism volume;
C, the cylinder made by step b are assembled in desulphurization plant, desulphurization plant two ends are provided with blast fence (baffle plate is for delaying the flow velocity of flue gas), desulphurization plant is connected with flue, the flue gas produced in flue passes into desulphurization plant and fully contacts with desulfurizing agent, carries out desulfurization; After measured, SO in flue gas
2initial concentration is 2000mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 145mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Embodiment 5: substantially the same manner as Example 1, difference is:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 40%, aluminium ash 20%, flyash 30% and useless carbon dust 10%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step difference from Example 1 of the method is:
In step c: SO in flue gas
2initial concentration is 3500mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 146mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Embodiment 6: substantially the same manner as Example 2, difference is:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 30%, aluminium ash 30%, flyash 20% and useless carbon dust 20%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step difference from Example 2 of the method is:
In step c: SO in flue gas
2initial concentration is 3000mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 142mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Embodiment 7: substantially the same manner as Example 3, difference is:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 35%, aluminium ash 10%, flyash 40% and useless carbon dust 15%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step difference from Example 3 of the method is:
In step c: SO in flue gas
2initial concentration is 2500mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 156mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Embodiment 8: substantially the same manner as Example 4, difference is:
Fume desulfurizing agent of the present invention, represents with weight percentage, is made up of red mud 50%, aluminium ash 15%, flyash 25% and useless carbon dust 10%.
The present invention utilizes fume desulfurizing agent to carry out the method for flue gas desulfurization, and the detailed step difference from Example 4 of the method is:
In step c: SO in flue gas
2initial concentration is 5000mg/Nm
3, flue gas after desulfurization, SO in flue gas
2concentration is 167mg/Nm
3, lower than the up-to-date discharge standard 200mg/Nm of country
3, discharged.
Claims (9)
1. a fume desulfurizing agent, is characterized in that: represent with weight percentage, and described fume desulfurizing agent is made up of red mud 10 ~ 80%, aluminium ash 5 ~ 50%, flyash 5 ~ 70% and useless carbon dust 5 ~ 30%.
2. fume desulfurizing agent according to claim 1, is characterized in that: described fume desulfurizing agent is made up of red mud 30 ~ 50%, aluminium ash 10 ~ 30%, flyash 20 ~ 40% and useless carbon dust 10 ~ 20%.
3. fume desulfurizing agent according to claim 1 and 2, it is characterized in that: represent with mass percent, in described red mud, main chemical compositions and content thereof are calcium oxide 6 ~ 50%, sodium oxide molybdena 2 ~ 10%, aluminium oxide 5 ~ 20%, iron oxide 5 ~ 50% and silica 3 ~ 25%; In described red mud, the basicity of attached liquid is 3000 ~ 15000mg/L.
4. fume desulfurizing agent according to claim 1 and 2, it is characterized in that: represent with mass percent, in described aluminium ash, main chemical compositions and content thereof are aluminium oxide 30 ~ 60%, silica 3 ~ 6%, sodium oxide molybdena 1 ~ 3%, calcium oxide 1 ~ 3% and magnesia 2 ~ 3%.
5. fume desulfurizing agent according to claim 1 and 2, it is characterized in that: represent with mass percent, in described flyash, main chemical compositions and content thereof are silica 30 ~ 60%, aluminium oxide 15 ~ 40%, iron oxide 2 ~ 6%, calcium oxide 1 ~ 10% and magnesia 1 ~ 4%.
6. fume desulfurizing agent according to claim 1 and 2, is characterized in that: the mass percentage shared by described useless carbon dust neutral and alkali material is 10 ~ 60%.
7. utilize fume desulfurizing agent described in claim 1 to carry out a method for flue gas desulfurization, it is characterized in that, said method comprising the steps of:
A, first take various raw material according to the ratio of fume desulfurizing agent described in claim 1, the various raw materials taken are mixed, obtains mixed material;
B, the mixed material obtained by step a are pressed into prism, and be provided with gas passage in the middle of the prism be pressed into, the volume of gas passage accounts for 30 ~ 60% of prism volume;
C, the prism assembling of being made by step b are filled in desulphurization plant, and desulphurization plant two ends are provided with blast fence, and desulphurization plant is connected with flue, and the flue gas produced in flue passes into desulphurization plant and fully contacts with desulfurizing agent, carries out desulfurization; After measured, the gas after desulfurization meets discharging standards, discharges.
8. utilize fume desulfurizing agent to carry out the method for flue gas desulfurization according to claim 7, it is characterized in that: prism described in step b is square, positive three prism, positive hexagonal prism or cuboid; The prism be pressed into is not broken when 1 meter of height freely falling body.
9. utilize fume desulfurizing agent to carry out the method for flue gas desulfurization according to claim 7, it is characterized in that: gas passage described in step b is the through hole be provided with along prism short transverse, its cross section is circular or polygon.
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| CN107754574A (en) * | 2017-11-02 | 2018-03-06 | 中晶蓝实业有限公司 | Fume desulfurizing agent based on red mud and its preparation method and application |
| CN107812441A (en) * | 2017-12-07 | 2018-03-20 | 中晶环境科技股份有限公司 | Flue gas dry desulfurizing method of denitration based on red mud |
| CN110079371B (en) * | 2019-04-30 | 2021-09-14 | 封金财 | Preparation method of purification particles for biomass fuel |
| CN110115921A (en) * | 2019-05-27 | 2019-08-13 | 沈阳三聚凯特催化剂有限公司 | A kind of Fe-series desulfurizing agent and preparation method thereof |
| CN110893312A (en) * | 2019-12-12 | 2020-03-20 | 山东庚辰环保新材料有限公司 | Novel high-efficiency desulfurizer and preparation method thereof |
| CN113368676B (en) * | 2021-07-06 | 2022-09-23 | 深圳灏权环保有限公司 | Flue gas desulfurization and denitrification integrated treatment method |
| CN114682085B (en) * | 2022-03-08 | 2024-01-02 | 天津水泥工业设计研究院有限公司 | Method for preparing cement kiln synergistic desulfurization and denitrification agent by recycling hazardous waste and solid waste |
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| CN101775325B (en) * | 2009-01-14 | 2012-12-19 | 张保森 | Coal composite sulfur fixing agent |
| CN102504908B (en) * | 2010-11-08 | 2014-03-12 | 翟风标 | Mineralizing sulfur-fixing agent and preparation method thereof |
| CN103028324B (en) * | 2012-12-10 | 2015-07-01 | 安阳化学工业集团有限责任公司 | Method for desulfurization of flue gas in boiler by using red mud |
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