CN105854551A - Double-alkali double-circulation desulfurization absorption system and method - Google Patents
Double-alkali double-circulation desulfurization absorption system and method Download PDFInfo
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- CN105854551A CN105854551A CN201610335231.7A CN201610335231A CN105854551A CN 105854551 A CN105854551 A CN 105854551A CN 201610335231 A CN201610335231 A CN 201610335231A CN 105854551 A CN105854551 A CN 105854551A
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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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
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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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
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention provides a double-alkali double-circulation desulfurization absorption system which comprises a tower body serving as a flue gas path; a calcium-based desulfurization absorption section and a sodium-based desulfurization absorption section are arranged in the tower body in the flowing direction of flue gas in sequence; through double-medium double-circulation secondary desulfurization, the desulphurization efficiency of the flue gas is improved, and circulating slurry obtained after desulfuration through a primary calcium-based absorbent and a secondary sodium-based absorbent is injected into a regeneration pool in proportion for reaction, so that the regeneration and the re-utilization of the sodium-based absorbent are realized, and by-product gypsum with economic values is generated, therefore, the investment and running costs are reduced. In addition, a turbulent pipe grid rectifying device is mounted at the upper part of a secondary slurry collecting device to play a role in the uniform distribution of a flow field, so that the gas-liquid mass transfer efficiency of the sodium-based desulfurization absorption section is improved, and the desulphurization efficiency is further increased. Meanwhile, the invention provides a double-alkali double-circulation desulfurization absorption method based on the system.
Description
Technical field
The present invention relates to environmental technology field, particularly relate to flue gas desulfurization technique, be specifically related to a kind of double alkali double circulation desulphurization and absorb
System and method.
Background technology
" coal electricity energy-saving and emission-reduction upgrading with transformation action plan (2014-2020) " require eastern region (Liaoning, Beijing, Tianjin,
11 provinces and cities such as Hebei, Shandong, Shanghai, Jiangsu, Zhejiang, Fujian, Guangdong, Hainan) newly-built Thermal generation unit atmospheric pollution
Thing concentration of emission basically reach gas turbine group emission limit (i.e. under the conditions of benchmark oxygen content 6%, flue dust, sulfur dioxide, nitrogen
Emissions of oxides concentration is respectively no higher than 10,35,50 milligrams/cubic metre), middle part (Heilungkiang, Jilin, Shanxi, peace
8 provinces such as emblem, Hubei, Hunan, Henan, Jiangxi) new-built unit is in principle close to or up gas turbine group emission limit, bulging
Encourage west area new-built unit close to or up gas turbine group emission limit.To the year two thousand twenty, eastern region active service 300,000 kilowatts
And above public Thermal generation unit, 100,000 kilowatts and above provide Thermal generation unit and other coal fired power generation machines with good conditionsi for oneself
Group, after transformation, Air Pollutant Emission concentration basically reaches gas turbine group emission limit.In view of Coal Combustion in China quality, to all
The flue gas that produces of coal-burning power plant be required for carrying out desulfurization process, and it is above-mentioned relevant to make the sulfur dioxide in flue gas content of discharge meet
Environmental requirement.
For the problem that China's major part region fire coal sulfur-bearing is too high, traditional single cycle desulfurization technology is extremely difficult to national environmental protection portion
New standard-required.Use single cycle desulfurization technology, apply wet limestone-gypsum FGD technique, only by lime stone slurry with
Coal-fired flue-gas is fully contacted desulfurization, even if under preferable operating mode, desulfuration efficiency is the highest also can only achieve 98%, for sulfur dioxide
Content is higher than 2000mg/Nm3Coal-fired flue-gas, use above-mentioned technology and technique to be difficult to qualified discharge, the most just
Need to increase extra processing means or equipment, improve and run and maintenance cost, and environmental protection equipment occupation of land can be increased, impact fire coal
The integral layout of power plant.
In order to improve desulfuration efficiency, those skilled in the art have started to attempt the desulphurization system that research and development are new, Chinese invention patent application
(application number 201510034481.2), discloses a kind of double circulation desulphurization system, by two stage cycle serosity each circulation desulfurization,
Sulfur dioxide in flue gas is removed.But the technical scheme of this patent application needs constantly to put into sodio desulfurization absorbent,
The regeneration of sodio desulfurization absorbent cannot be realized, therefore not only result in the significant wastage of operating cost, and whole serum recycle
In receive ion concentration improve constantly also can affect gypsum slurries generate, and then reduce desulfuration efficiency, it exists bigger on the implementation
Limitation.
Additionally, the uniform degree in the flue gas of this patent application flow field after gas-liquid separation device can decline to a great extent, second can be reduced
Desulfuration efficiency in circulation desulfurization region.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of double alkali double circulation desulphurization absorption system and method, by double media
Bicirculating two-grade desulfurizing, improves smoke desulfurization efficiency, and by following after one-level calcium-base absorbing agent and two grades of sodio absorbent desulfurization
Ring serosity injects regenerated reactor in proportion and reacts, it is achieved the regeneration of sodio absorbent and recycling, generates and has economic worth
By-produced gypsum, thus reduce input and operating cost.It addition, it is whole to install turbulent pipe grid on two grades of serosity collection device tops
Stream device, plays the effect in uniform flow field, improves the gas-liquid mass transfer efficiency of sodio desulfurization absorber portion, increases desulfuration efficiency further.
For reaching above-mentioned purpose, the concrete technical scheme that the present invention takes is:
A kind of double alkali double circulation desulphurization absorption system, including:
A tower body as flue gas path；
A calcium-based desulfurization absorber portion and a sodio desulfurization absorber portion have been sequentially arranged it along flue gas flow direction in described tower body；
Described sodio desulfurization absorber portion includes: some two grades of spraying layers, is positioned at the serosity below described two grades of spraying layers and collects dress
Put, the fairing between described two grades of spraying layers and described serosity collection device, and be communicated in described two grades of spraying layers
And the sodio absorbent pond between described serosity collection device；
Described calcium-based desulfurization absorber portion includes: connection is positioned at some one-level spraying layers in the calcium-based slurries pond bottom described absorption tower；
Described sodio absorbent pond and calcium-based slurries pond connect a regenerating unit simultaneously；
One regeneration serum outlet of described regenerating unit is communicated to the overhead stream in described sodio absorbent pond.
Further, the quantity of described one-level spraying layer and two grades of spraying layers is all less than three layers.
Further, fairing is selected from deflector, perforated trays, flow straightening grid or rectifier tube row.
Further, arranging multiple projection bottom described serosity collection device, top or the sidepiece of described projection have passage.
Further, it is tapered bottom described serosity collection device.
A kind of double alkali double circulation desulphurization absorption process, comprises the following steps:
1) calcium-base absorbing agent after coal-fired flue-gas enters a flue gas path and is atomized inversely contacts and carries out first grade desulfurizing, is once taken off
Sulfur flue gas；Calcium-base absorbing agent recycles；
2) flow field of once desulfurization flue gas is carried out rectification so that it is flow field uniform after be atomized after sodio absorbent inversely contact into
Row two-grade desulfurizing, obtains secondary desulfuration flue gas；Sodio absorbent recycles；
3) when the pH value of calcium-base absorbing agent and sodio absorbent is less than a threshold values, the two injects a regenerating unit in proportion；
4) the regeneration sodio serosity that regenerating unit produces supplements sodio absorbent.
Further, step 1) described in calcium-base absorbing agent pH value be 4.5-5.2.
Further, step 1) described in calcium-base absorbing agent be aqua calcis or lime stone slurry.
Further, step 2) described in sodio absorbent selected from sodium carbonate or sodium hydroxide.
Further, step 4) in sodio absorbent and the injection ratio of calcium-base absorbing agent ensure that Na ion concentration is dense with calcium ion
Degree ratio is 2:1.
Sulfur-containing smoke gas is entered in absorption tower by absorption tower entrance, sequentially passes through tradition calcium-based desulfurization absorber portion, turbulent pipe grid rectification dress
Put, sodio desulfurization absorber portion and flue gas demister, discharge eventually through absorption tower outlet.Circulating absorption solution after two-step desulfurization
Squeezing into regenerating unit in proportion and carry out the regeneration of sodio absorbent, the absorbent after regeneration can be recycled, the residue slurry after regeneration
Liquid is squeezed into oxidation pond again and is produced Gypsum Fibrosum.
This device has the advantage that desulfuration efficiency is high, owing to have employed two kinds of different absorbing mediuies, can be effectively improved desulfurization effect
Rate, reduces liquid-gas ratio, and the renewable recycling of sodio absorbent, reduces operating cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of double alkali double circulation desulphurization absorption systems in one embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete retouching
State, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.Coordinate institute's accompanying drawing that the features and advantages of the present invention are elaborated below.
As it is shown in figure 1, the double alkali double circulation desulphurization absorption systems provided in one embodiment, including:
Tower body 1 as flue gas path；
Calcium-based desulfurization absorber portion 2 and sodio desulfurization absorber portion 3 have been sequentially arranged it along flue gas flow direction in tower body 1；
Sodio desulfurization absorber portion 3 includes: three layers of two grades of spraying layer 7, is positioned at the serosity collection device 5 below two grades of spraying layers 7,
Turbulent pipe grid fairing between two grades of spraying layers 7 and serosity collection device 5, and is communicated in two grades of spraying layers 7 and 5
Sodio absorbent pond 8 between serosity collection device；
Calcium-based desulfurization absorber portion 2 includes: connection is positioned at three layers of one-level spraying layer 6 in the calcium-based slurries pond 4 bottom absorption tower；
Sodio absorbent pond 8 and calcium-based slurries pond 4 connect regenerating unit 9 simultaneously；
The regeneration serosity outlet of regenerating unit 9 is to the overhead stream in sodio absorbent pond 8.
The quantity of one-level spraying layer and two grades of spraying layers is not limited to three layers, in other embodiments, owing to using efficient Two-way Cycle to take off
Sulfur mode, the quantity of one-level spraying layer and two grades of spray beautiful jade layers is all not over three layers.
In other embodiments, fairing is further selected from the having of other structures such as deflector, perforated trays, flow straightening grid and leads
Stream, the structure of flow equalizing function.
In other embodiments, arranging multiple protruding (not shown) bottom serosity collection device, protruding top or sidepiece have logical
Pore, flue gas can pass through vent flow.
In other embodiment, it is tapered bottom serosity collection device, the beneficially collection of serosity.
Double alkali double circulation desulphurization absorption process based on said system, comprises the following steps:
1) calcium-base absorbing agent after coal-fired flue-gas enters a flue gas path and is atomized inversely contacts and carries out first grade desulfurizing, is once taken off
Sulfur flue gas；Calcium-base absorbing agent recycles；
2) flow field of once desulfurization flue gas is carried out rectification so that it is flow field uniform after be atomized after sodio absorbent inversely contact into
Row two-grade desulfurizing, obtains secondary desulfuration flue gas；Sodio absorbent recycles；
3) when the pH value of calcium-base absorbing agent and sodio absorbent is less than a threshold values, the two injects a regenerating unit in proportion；
4) the regeneration sodio serosity that regenerating unit produces supplements sodio absorbent.
Wherein, step 1) described in calcium-base absorbing agent pH value be 4.5-5.2；Step 1) described in calcium-base absorbing agent be hydrogen-oxygen
Change calcium solution or lime stone slurry；Step 2) described in sodio absorbent selected from sodium carbonate or sodium hydroxide；Step 4) in sodio
With the injection ratio of calcium-base absorbing agent, absorbent ensures that Na ion concentration and calcium ion concentration ratio are 2:1.
The former flue gas of sulfur-bearing enters absorption tower through entrance, sequentially passes through calcium-based desulfurization absorber portion, sodio desulfurization absorber portion, flue gas except mist
Device, is finally discharged by outlet.Main operational principle is:
The most former flue gas is carried out absorption tower by entrance, first with atomization after calcium-base absorbing agent (such as calcium hydroxide or lime stone slurry)
Reverse contact carries out desulfurization, and calcium-base absorbing agent pH value adjusts between 4.5-5.2, and desulfurization rear slurry falls after rise to tower prime cement pond, then
Recycle.When calcium-base absorbing agent pH is less than 4.5, serosity is squeezed into regenerated reactor, and refills fresh slurry.One-level is followed
Ring serosity acts primarily as the effect of pre-washing, and lower ph can ensure that being completely dissolved of absorbent, and obtains more preferable gypsum qualitt.
In conventional single column single cycle absorption technique, pH is typically between 5.2-5.5, to being easy on the basis of ensureing certain desulfuration efficiency
Oxidation and dehydration, but usually face the awkward situation that oxidation is unfavorable or desulfuration efficiency is relatively low.
2. flue gas is after first order absorption agent desulfurization, passes upward through two grades of serosity collection devices, and after turbulent pipe grid device rectification,
Inversely contacting with the sodio absorbent after atomization and carry out desulfurization, the serosity collection after desulfurization recycles to the outer stock tank of tower.Sodio is inhaled
Receiving agent can be sodium carbonate or sodium hydroxide, and as used sodium carbonate, then effecting reaction pH is between 4.4-7.6, during less than 4.4
Serosity is squeezed into regenerated reactor, and injects fresh slurry in the outer stock tank of tower；As used sodium hydroxide then effecting reaction pH scope to exist
Between 10-12, regenerated reactor outlet slurry pH value is relatively beneficial to absorb reaction and is smoothed out when about 7.
Whole sodio absorbent all injects regenerated reactor, and sodio absorbent and the injection ratio of calcium-base absorbing agent ensure that sodium ion is dense
Degree and calcium ion concentration ratio are about 2:1.After being sufficiently stirred for reaction completely, the sodio absorbent clear liquid note that top is regenerated
Returning the outer stock tank of tower, lower slurry is squeezed into oxidation pond and is blasted oxidation air, and makes by-product after cyclone and vacuum belt dewaterer
Product Gypsum Fibrosum.
Double medium two stage cycle desulphurization systems that the present invention proposes have the ability that regeneration of absorption solution recycles, and absorb in two-stage
Install turbulent pipe grid fairing between region additional and play airflow uniform distribution effect, on the premise of reaching equal removal effect, can effectively drop
Low liquid-gas ratio, and reduce operating cost.
As a example by a practical sulphur removal system, using sodium carbonate as sodio absorbent, lime stone slurry is as calcium-base absorbing agent, hydrogen-oxygen
Change sodium is as sodio absorbent, and raw flue gas content of sulfur dioxide before entering absorption tower is 4000mg/Nm3, respectively through one-level,
After two-grade desulfurizing, the content of sulfur dioxide in flue gas is reduced to 35mg/Nm3, meet discharge standard.Wherein, absorb due to sodio
Agent can be constantly regenerating, and calcium-base absorbing agent may be used for making Gypsum Fibrosum after desulfurization, and fume treatment cost can be greatly lowered.
Comparative example 1:
The above-mentioned desulphurization system of same employing, removes current equalizer, owing to serosity collection device is placed in first grade desulfurizing and two-grade desulfurizing
Between, it is that flue gas is mainly concentrated along tower wall, it is impossible to realize uniform, cause the titanium dioxide that two-grade desulfurizing effect is unsatisfactory, same
Sulfur content is 4000mg/Nm3Flue gas, after being processed by this comparative example, the content of sulfur dioxide in flue gas is reduced to
50mg/Nm3, it is impossible to realize qualified discharge.
As a example by another practical sulphur removal system, using sodium hydroxide as sodio absorbent, calcium hydroxide slurry as calcium-base absorbing agent,
Sodium carbonate is as sodio absorbent, and raw flue gas content of sulfur dioxide before entering absorption tower is 4000mg/Nm3, respectively through one
After level, two-grade desulfurizing, the content of sulfur dioxide in flue gas is reduced to 35mg/Nm3, meet discharge standard.Wherein, due to sodio
Absorbent can be constantly regenerating, and calcium-base absorbing agent may be used for making Gypsum Fibrosum after desulfurization, and fume treatment cost can be greatly lowered.
Claims (10)
1. a double alkali double circulation desulphurization absorption system, it is characterised in that including:
A tower body as flue gas path；
A calcium-based desulfurization absorber portion and a sodio desulfurization absorber portion have been sequentially arranged it along flue gas flow direction in described tower body；
Described sodio desulfurization absorber portion includes: some two grades of spraying layers, is positioned at the serosity below described two grades of spraying layers and collects dress
Put, the fairing between described two grades of spraying layers and described serosity collection device, be communicated in described two grades of spraying layers and
A sodio absorbent pond between described serosity collection device；
Described calcium-based desulfurization absorber portion includes: connection is positioned at some one-level spraying layers in the calcium-based slurries pond bottom described absorption tower；
Described sodio absorbent pond and calcium-based slurries pond connect a regenerating unit simultaneously；
One regeneration serum outlet of described regenerating unit is communicated to the overhead stream in described sodio absorbent pond.
2. double alkali double circulation desulphurization absorption system as claimed in claim 1, it is characterised in that described one-level spraying layer and two grades of sprays
Drench the quantity of layer all less than three layers.
3. alkali double circulation desulphurization absorption systems as claimed in claim 1 double, it is characterised in that fairing is selected from deflector, many
Hole pallet, flow straightening grid or rectifier tube row.
4. double alkali double circulation desulphurization absorption system as claimed in claim 1, it is characterised in that set bottom described serosity collection device
Putting multiple projection, top or the sidepiece of described projection have passage.
5. double alkali double circulation desulphurization absorption system as claimed in claim 1, it is characterised in that bottom described serosity collection device be
Tapered.
6. double alkali double circulation desulphurization absorption process, comprise the following steps:
1) calcium-base absorbing agent after coal-fired flue-gas enters a flue gas path and is atomized inversely contacts and carries out first grade desulfurizing, is once taken off
Sulfur flue gas；Calcium-base absorbing agent recycles；
2) flow field of once desulfurization flue gas is carried out rectification so that it is flow field uniform after be atomized after sodio absorbent inversely contact into
Row two-grade desulfurizing, obtains secondary desulfuration flue gas；Sodio absorbent recycles；
3) when the pH value of calcium-base absorbing agent and sodio absorbent is less than a threshold values, the two injects a regenerating unit in proportion；
4) the regeneration sodio serosity that regenerating unit produces supplements sodio absorbent.
7. alkali double circulation desulphurization absorption process as claimed in claim 6 double, it is characterised in that step 1) described in calcium-base absorbing agent
PH value is 4.5-5.2.
8. alkali double circulation desulphurization absorption process as claimed in claim 6 double, it is characterised in that step 1) described in calcium-base absorbing agent
For aqua calcis or lime stone slurry.
9. alkali double circulation desulphurization absorption process as claimed in claim 6 double, it is characterised in that step 2) described in sodio absorbent
Selected from sodium carbonate or sodium hydroxide.
10. alkali double circulation desulphurization absorption process as claimed in claim 6 double, it is characterised in that step 4) in sodio absorbent and calcium
The injection ratio of base absorbant ensures that Na ion concentration and calcium ion concentration ratio are 2:1.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106237855A (en) * | 2016-08-30 | 2016-12-21 | 杭州玺清环保科技有限公司 | A kind of absorption tower for ultralow desulfurization |
| CN108452661A (en) * | 2018-06-08 | 2018-08-28 | 国家能源投资集团有限责任公司 | The desulfurizer and sulfur method of boiler smoke |
| CN110124496A (en) * | 2019-05-24 | 2019-08-16 | 湖南省湘衡盐化有限责任公司 | A kind of double circulation desulphurization process |
| CN110127723A (en) * | 2019-05-28 | 2019-08-16 | 南京杰科丰环保技术装备研究院有限公司 | A kind of urea pyrolysis reactor for preventing tail portion from crystallizing |
| CN111475959A (en) * | 2020-04-14 | 2020-07-31 | 大唐环境产业集团股份有限公司 | Novel method for determining shape of absorption tower for desulfurization |
| CN111589283A (en) * | 2020-06-24 | 2020-08-28 | 上海化工研究院有限公司 | Method for efficiently removing sulfur dioxide in tail gas |
| CN111701436A (en) * | 2020-06-23 | 2020-09-25 | 湖北真诚纸业有限公司 | Novel dual-alkali desulfurization method |
| CN114911169A (en) * | 2022-06-13 | 2022-08-16 | 大唐环境产业集团股份有限公司 | Method, system, equipment and medium for optimizing desulfurization synergistic device |
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