CN105498514A - Cement kiln flue gas desulfurization system and method - Google Patents
Cement kiln flue gas desulfurization system and method Download PDFInfo
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- CN105498514A CN105498514A CN201610046467.9A CN201610046467A CN105498514A CN 105498514 A CN105498514 A CN 105498514A CN 201610046467 A CN201610046467 A CN 201610046467A CN 105498514 A CN105498514 A CN 105498514A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to a cement kiln flue gas desulphurization system and method. The system comprises a desulfurizing agent powder bin, a desulfurizing agent slurry box, an absorption tower, an absorption tower funnel and a gypsum dehydration device which are sequentially connected, and the absorption tower is internally provided with a demister located at the top, a spraying area located in the middle and a slurry pool located at the bottom; desulfurizing agent slurry in the desulfurizing agent slurry box is sent into the slurry pool through a first slurry pump, desulfurizing agent slurry in the slurry pool is sent into the spraying area through the first slurry pump, flue gas is conveyed into the spraying area through a booster fan, the slurry pool is further connected with an oxidation air pipe and oxidation air blowers, and a stirrer is arranged inside the slurry pool. According to the cement kiln flue gas desulfurization system and method, cement kiln SP boiler ash or kiln tail bag collection ash is adopted as desulfurizing agent, use cost of the desulfurizing agent is lowered, generated desulfurization gypsum is directly accepted and utilized by a cement factory, and generated waste water is treated through an original water treatment system of a factory and then totally recycled as process water, so that no secondary pollution is caused.
Description
Technical field
The present invention relates to cement kiln field, more particularly, relate to a kind of cement kiln flue gas desulphurization system.
Background technology
SO in cement industry flue gas
2be mainly derived from the sulfide in raw material and fuel and elemental sulfur, due to cement kiln process itself, cement kiln exit gas SO
2discharge capacity is lower, does not cause enough attention in the past, but along with the develop rapidly of China's economy, energy resource consumption also sharply increases, SO
2total release position at the forefront in the world, to natural resources, the ecosystem, public health produce serious threat.Cement industry is one of main fixed discharge source of atmosphere pollution; under the background that environment worsens; cement industry discharge standard is also all the more strict; in December, 2013; Environmental Protection Department has been issued " cement industry atmosphere pollutants emission standards " (GB4915-2013) of the 3rd revision; significantly improve the emission limit of multiple pollutant, following discharge standard is inherently more and more stricter.Therefore, cement industry must carry out flue gas desulfurization improvement targetedly, and has higher requirement to desulfuration efficiency.The introduction of the current wet method fume desulfurizing system of China and research mainly for thermal power industry, develop a kind of for and seem particularly important in conjunction with the high efficiency flue gas desulfurization technology of cement industry process characteristic and device.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of cement kiln flue gas desulphurization system and method.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of cement kiln flue gas desulphurization system, comprise connect successively desulfurizing agent powder storehouse, desulfurizer slurry case and absorption tower, described absorption tower chimney and gypsum dewatering equipment, be provided with in described absorption tower be positioned at top demister, be positioned at middle part spray district and be positioned at bottom slurry pool;
Desulfurizer slurry in desulfurizer slurry case is delivered in described slurry pool by the first slush pump, desulfurizer slurry in slurry pool delivers to described spray district by the first slush pump, flue gas is delivered to described spray district by booster fan, described slurry pool is also connected with oxidation air pipeline and oxidation fan, and described slurry pool inside is provided with agitator;
Flue gas and absorption slurries counter current contacting, the SO in flue gas
2and SO
3lime stone in gas and desulfurizer slurry reacts, and form calcium sulfite, calcium sulfite oxidized air oxygen in slurry pool changes into calcium sulfate, and crystallize into gypsum, gypsum drains into described gypsum dewatering equipment by excavationg pump; The slurries that reacted flue gas is carried secretly are collected by demister, and flue gas after desulfurization enters smoke stack emission.
In such scheme, described gypsum dewatering equipment comprises cyclone and vacuum belt dewaterer.
In such scheme, after the water produced enters water treatment system process, flow into described desulfurizer slurry case in described cyclone and vacuum belt dewaterer.
In such scheme, described spray district is provided with multiple spraying layer, and each spraying layer correspondence arranges described second slush pump, and each spraying layer is provided with multiple nozzle, and the spray angle of nozzle partly overlaps.
In such scheme, described excavationg pump is also connected with accident slurry tank, and described accident slurry tank is connected with described slurry pool by pipeline.
In such scheme, between described booster fan and described absorption tower, be provided with slide valve, between described absorption tower and described chimney, be provided with slide valve, between described booster fan and chimney, be also provided with slide valve.
Present invention also offers a kind of cement kiln flue gas sulfur method utilizing above-mentioned desulphurization system, comprise the following steps:
S1, employing cement kiln SP Boiler Ash or kiln tail bag collected ash as desulfurizing agent, and are stored in desulfurizing agent powder storehouse;
Desulfurizing agent in S2, desulfurizing agent powder storehouse adds in desulfurizer slurry case by batcher, adds fresh water (FW) and be mixed with desulfurizer slurry in desulfurizer slurry case;
S3, desulfurizer slurry are delivered in slurry pool by the first slush pump, and the desulfurizer slurry in slurry pool delivers to spray district by the first slush pump, and flue gas is delivered to spray district by booster fan, flue gas and absorption slurries counter current contacting, the SO in flue gas
2and SO
3lime stone in gas and desulfurizer slurry reacts, and form calcium sulfite, calcium sulfite oxidized air oxygen in slurry pool changes into calcium sulfate, crystallizes into gypsum;
The slurries that S4, reacted flue gas are carried secretly are collected by demister, and flue gas after desulfurization enters smoke stack emission;
S5, gypsum drain into gypsum dewatering equipment by excavationg pump and carry out processed.
Implement cement kiln flue gas desulphurization system of the present invention and method, there is following beneficial effect:
1, desulfurizing agent adopts cement kiln SP Boiler Ash or kiln tail bag collected ash as desulfurizing agent, reduces desulfurizing agent use cost;
2, set gradually demister, spray district and slurry pool in absorption tower, facility compact, floor space are little;
3, the corresponding one deck spraying layer of every platform slurry circulating pump, can select circulating pump to open situation according to cement kiln flue gas working conditions change, save operating cost;
4, the desulfurated plaster that this system produces directly is accepted utilization by cement factory, and the waste water of generation all as fresh water (FW) reuse, does not produce secondary pollution after the original water treatment system process of factory.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic diagram of cement kiln flue gas desulphurization system of the present invention.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, cement kiln flue gas desulphurization system of the present invention comprise connect successively desulfurizing agent powder storehouse 6, desulfurizer slurry case 7 and absorption tower 3, absorption tower 3 chimney 4 and gypsum dewatering equipment.
Be provided with in absorption tower 3 be positioned at top demister, be positioned at middle part spray district and be positioned at bottom slurry pool.
Desulfurizer slurry in desulfurizer slurry case 7 is delivered in slurry pool by the first slush pump 8, and the desulfurizer slurry in slurry pool delivers to spray district by the first slush pump 8, and flue gas is delivered to spray district by booster fan 1.Be provided with slide valve 2 between booster fan 1 and absorption tower 3, between absorption tower 3 and chimney 4, be provided with slide valve 2, between booster fan 1 and chimney 4, be also provided with slide valve 2.Slurry pool is also connected with oxidation air pipeline and oxidation fan 5, and slurry pool inside is provided with agitator.
Flue gas and absorption slurries counter current contacting, the SO in flue gas
2and SO
3lime stone in gas and desulfurizer slurry reacts, and forms calcium sulfite.Oxidation fan 5 and oxidation air pipeline provide oxidation air, and calcium sulfite oxidized air oxygen in slurry pool changes into calcium sulfate, crystallizes into gypsum.Gypsum drains into gypsum dewatering equipment by excavationg pump 10.The slurries that reacted flue gas is carried secretly are collected by demister, the timing automatic flushing of demister, ensure that demister is without fouling.Flue gas after desulfurization enters chimney 4 and discharges.PH value in the slurry pool of absorption tower 3 controls by dropping into desulfurizing agent dosage, controls 5 ~ 6, and the Assurance of Size of absorption tower 3 slurry pool can provide enough slurries time of staying to complete calcium sulfite to the oxidation of calcium sulfate and gypsum (CaSO
42H
2o) crystallization.
Further, gypsum dewatering equipment comprises cyclone 12 and vacuum belt dewaterer 13.From absorption tower 3 plaster slurry pump come concentration be the gypsum slurries of about 15% through cyclone 12 classification, cyclone 12 bottom slurry is concentrated to about 50%, delivers to vacuum belt dewaterer 13, after vacuum filtration, make final gypsum product through gypsum underflow distributor.The overflow of cyclone 12 and vacuum belt dewaterer 13 filtrate after treatment can as with slurry, flushing water reuses.Gypsum dehydration system finished product is directly recycled by cement factory as set retarder.
Further, spray district is provided with multiple spraying layer, and each spraying layer correspondence arranges second slush pump 9, circulating pump can be selected to open situation according to cement kiln flue gas working conditions change, save operating cost.Each spraying layer is provided with multiple nozzle, and the spray angle of nozzle keeps a certain proportion of degree of overlapping.Can also relative set flusher, flue gas even distribution device, oxidation air even distribution device in absorption tower 3.
Further, excavationg pump 10 is also connected with accident slurry tank 11, and accident slurry tank 11 returns pump 18 by accident liquid and is connected with slurry pool.When normal operation, gypsum slurries is delivered to gypsum dewatering equipment, when gypsum excavationg pump 10 is also used for having an accident, the slurries in absorption tower 3 are transported in accident slurry tank 11.The slurries that when accident slurry tank 11 is mainly used in collection accident, absorption tower 3 is discharged, each equipment flushing water, pipe flushing water, absorption tower 3 region flushing water and other region flushing water during operation, and return to absorption tower 3.Slurry pool is also connected with drain water pump 14 and drain 16.The slurries that when drain 16 is mainly used in collection accident, absorption tower 3 is discharged, each equipment flushing water, pipe flushing water, absorption tower 3 region flushing water and other region flushing waters during operation, and return to absorption tower 3.
The present invention is applied to the flue gas desulfurization of 5500tpd cement kiln tail, kiln tail bag collected ash is collected and is stored to desulfurizing agent powder storehouse 6, desulfurizer slurry case 7 is transported to through batcher, fresh water (FW) is added in slurry tank, and mixer is set stirs, be configured to the desulfurizer slurry that concentration is 30%, supply the first slush pump 8 by absorbent and be delivered to absorption tower 3.The flue gas of all flue gas cement kiln end discharges that kiln tail tail exhaust blower is got rid of is sent into desulfuration absorbing tower 3 through booster fan 1 and is purified.Former flue gas SO
2concentration 1000mg/Nm
3, absorb slurries and be delivered to spraying layer by slurry circulating pump 9, every layer of spraying layer arranges multiple nozzle and is atomized by absorbing liquid, and arranging of nozzle keeps a certain proportion of degree of overlapping, flue gas and the reverse flow of absorption slurry spraying hanging drop, SO
2and SO
3react Deng with suspension, form calcium sulfite, open three layers of spraying layer desulfuration efficiency and reach more than 90%, SO2 content lower than 100mg/Nm
3calcium sulfite oxidation crystallization occurs in oxidizing and crystallizing district, bottom, absorption tower, stirring measure is adopted to avoid slurries to precipitate, oxidation air system is made up of oxidation fan 5 and oxidation air pipeline, pH value in the stock tank of absorption tower controls by dropping into desulfurizing agent dosage, control 5 ~ 6, the Assurance of Size of slurry pool of absorption tower can provide enough slurries time of staying to complete calcium sulfite to the oxidation of calcium sulfate and gypsum (CaSO
42H
2o) crystallization.The slurries that neat stress is carried secretly are collected by the two-stage demister in slurry spraying system downstream, and flue gas carries moisture and is less than 65mg/Nm
3neat stress enters chimney 4 through flue and discharges.The timing automatic flushing of demister, ensures that demister is without fouling.Absorption tower configuration gypsum excavationg pump 10, delivers to gypsum dehydration system when normal operation by gypsum slurries.Gypsum excavationg pump sucks face and is provided with filter screen, is used for tackling solid particulate matter (agglomerate as in gypsum).Slurries in absorption tower are transported in accident serum pot when being also used for having an accident by gypsum excavationg pump.From absorption tower plaster slurry pump come concentration be the gypsum slurries of about 15% through hydrocyclone 12 classification, cyclone bottom slurry is concentrated to about 50%, delivers to vacuum belt dewaterer 13 through gypsum underflow distributor, after vacuum filtration, recycle; The overflow of gypsum hydrocyclone enters filtrate box, and unnecessary overflow can by cement production process reuse.Gypsum dehydration system finished product moisture content is lower than 10%
Present invention also offers a kind of cement kiln flue gas sulfur method, comprise the following steps:
S1, employing cement kiln SP Boiler Ash or kiln tail bag collected ash as desulfurizing agent, and are stored in desulfurizing agent powder storehouse;
Desulfurizing agent in S2, desulfurizing agent powder storehouse adds in desulfurizer slurry case by batcher, in desulfurizer slurry case, add the desulfurizer slurry that fresh water (FW) is mixed with 30%;
S3, desulfurizer slurry are delivered in slurry pool by the first slush pump, and the desulfurizer slurry in slurry pool delivers to spray district by the first slush pump, and flue gas is delivered to spray district by booster fan, flue gas and absorption slurries counter current contacting, the SO in flue gas
2and SO
3lime stone in gas and desulfurizer slurry reacts, and form calcium sulfite, calcium sulfite oxidized air oxygen in slurry pool changes into calcium sulfate, crystallizes into gypsum;
The slurries that S4, reacted flue gas are carried secretly are collected by demister, and flue gas after desulfurization enters smoke stack emission;
S5, gypsum drain into gypsum dewatering equipment by excavationg pump and carry out processed.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (7)
1. a cement kiln flue gas desulphurization system, it is characterized in that, comprise connect successively desulfurizing agent powder storehouse, desulfurizer slurry case and absorption tower, described absorption tower chimney and gypsum dewatering equipment, be provided with in described absorption tower be positioned at top demister, be positioned at middle part spray district and be positioned at bottom slurry pool;
Desulfurizer slurry in desulfurizer slurry case is delivered in described slurry pool by the first slush pump, desulfurizer slurry in slurry pool delivers to described spray district by the first slush pump, flue gas is delivered to described spray district by booster fan, described slurry pool is also connected with oxidation air pipeline and oxidation fan, and described slurry pool inside is provided with agitator;
Flue gas and absorption slurries counter current contacting, the SO in flue gas
2and SO
3lime stone in gas and desulfurizer slurry reacts, and form calcium sulfite, calcium sulfite oxidized air oxygen in slurry pool changes into calcium sulfate, and crystallize into gypsum, gypsum drains into described gypsum dewatering equipment by excavationg pump; The slurries that reacted flue gas is carried secretly are collected by demister, and flue gas after desulfurization enters smoke stack emission.
2. cement kiln flue gas desulphurization system according to claim 1, is characterized in that, described gypsum dewatering equipment comprises cyclone and vacuum belt dewaterer.
3. cement kiln flue gas desulphurization system according to claim 2, is characterized in that, flows into described desulfurizer slurry case after the water produced enters water treatment system process in described cyclone and vacuum belt dewaterer.
4. cement kiln flue gas desulphurization system according to claim 1, is characterized in that, described spray district is provided with multiple spraying layer, and each spraying layer correspondence arranges described second slush pump, and each spraying layer is provided with multiple nozzle, and the spray angle of nozzle partly overlaps.
5. cement kiln flue gas desulphurization system according to claim 1, is characterized in that, described excavationg pump is also connected with accident slurry tank, and described accident slurry tank is connected with described slurry pool by pipeline.
6. cement kiln flue gas desulphurization system according to claim 1, it is characterized in that, be provided with slide valve between described booster fan and described absorption tower, between described absorption tower and described chimney, be provided with slide valve, between described booster fan and chimney, be also provided with slide valve.
7. utilize a cement kiln flue gas sulfur method for desulphurization system in claim 1-6, it is characterized in that, comprise the following steps:
S1, employing cement kiln SP Boiler Ash or kiln tail bag collected ash as desulfurizing agent, and are stored in desulfurizing agent powder storehouse;
Desulfurizing agent in S2, desulfurizing agent powder storehouse adds in desulfurizer slurry case by batcher, adds fresh water (FW) and be mixed with desulfurizer slurry in desulfurizer slurry case;
S3, desulfurizer slurry are delivered in slurry pool by the first slush pump, and the desulfurizer slurry in slurry pool delivers to spray district by the first slush pump, and flue gas is delivered to spray district by booster fan, flue gas and absorption slurries counter current contacting, the SO in flue gas
2and SO
3lime stone in gas and desulfurizer slurry reacts, and form calcium sulfite, calcium sulfite oxidized air oxygen in slurry pool changes into calcium sulfate, crystallizes into gypsum;
The slurries that S4, reacted flue gas are carried secretly are collected by demister, and flue gas after desulfurization enters smoke stack emission;
S5, gypsum drain into gypsum dewatering equipment by excavationg pump and carry out processed.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106171093A (en) * | 2016-07-11 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of ardealite and the method in desulfurated plaster improved coordination salt-soda soil |
| CN106390707A (en) * | 2016-11-30 | 2017-02-15 | 合肥亿福自动化科技有限公司 | Flue gas wet-desulfurization system |
| CN107215587A (en) * | 2017-07-12 | 2017-09-29 | 合肥中亚环保科技有限公司 | A kind of cement flue Dust produces the pretreatment feed conveying device of desulfurizing agent |
| CN107362675A (en) * | 2016-05-12 | 2017-11-21 | 南京凯盛国际工程有限公司 | Cement kiln flue gas while desulfuration demercuration system and method |
| CN107998865A (en) * | 2018-01-17 | 2018-05-08 | 青岛科技大学 | A kind of flue-gas dust-removing and desulfurization cleaning system |
| CN108840584A (en) * | 2018-06-28 | 2018-11-20 | 中国建筑材料科学研究总院有限公司 | The preparation system and method for cement |
| CN109126406A (en) * | 2018-06-22 | 2019-01-04 | 西安西矿环保科技有限公司 | Deep desulfuration demisting dust separation system for cement kiln end flue gas |
| CN109351156A (en) * | 2018-11-20 | 2019-02-19 | 东方电气集团东方锅炉股份有限公司 | A kind of the removing system and removal methods of cement kiln tail gas sulphur dioxide |
| CN109499304A (en) * | 2018-12-27 | 2019-03-22 | 朱敬 | The device and technique of sulfur dioxide in a kind of efficient removal coal-fired flue-gas |
| CN110090536A (en) * | 2019-05-13 | 2019-08-06 | 张大康 | A kind of thin desulfurizing agent of height for Industrial Boiler |
| CN112999839A (en) * | 2021-03-26 | 2021-06-22 | 四川利弘陶瓷有限公司 | Flue gas desulfurization system of drying tower kiln |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107362675A (en) * | 2016-05-12 | 2017-11-21 | 南京凯盛国际工程有限公司 | Cement kiln flue gas while desulfuration demercuration system and method |
| CN106171093A (en) * | 2016-07-11 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of ardealite and the method in desulfurated plaster improved coordination salt-soda soil |
| CN106390707A (en) * | 2016-11-30 | 2017-02-15 | 合肥亿福自动化科技有限公司 | Flue gas wet-desulfurization system |
| CN107215587A (en) * | 2017-07-12 | 2017-09-29 | 合肥中亚环保科技有限公司 | A kind of cement flue Dust produces the pretreatment feed conveying device of desulfurizing agent |
| CN107998865A (en) * | 2018-01-17 | 2018-05-08 | 青岛科技大学 | A kind of flue-gas dust-removing and desulfurization cleaning system |
| CN109126406A (en) * | 2018-06-22 | 2019-01-04 | 西安西矿环保科技有限公司 | Deep desulfuration demisting dust separation system for cement kiln end flue gas |
| CN108840584A (en) * | 2018-06-28 | 2018-11-20 | 中国建筑材料科学研究总院有限公司 | The preparation system and method for cement |
| CN109351156A (en) * | 2018-11-20 | 2019-02-19 | 东方电气集团东方锅炉股份有限公司 | A kind of the removing system and removal methods of cement kiln tail gas sulphur dioxide |
| CN109351156B (en) * | 2018-11-20 | 2024-02-02 | 东方电气集团东方锅炉股份有限公司 | System and method for removing sulfur dioxide in tail gas of cement kiln |
| CN109499304A (en) * | 2018-12-27 | 2019-03-22 | 朱敬 | The device and technique of sulfur dioxide in a kind of efficient removal coal-fired flue-gas |
| CN110090536A (en) * | 2019-05-13 | 2019-08-06 | 张大康 | A kind of thin desulfurizing agent of height for Industrial Boiler |
| CN112999839A (en) * | 2021-03-26 | 2021-06-22 | 四川利弘陶瓷有限公司 | Flue gas desulfurization system of drying tower kiln |
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