CN111773889A - High-efficient recovery unit of organic amine liquid of flue gas desulfurization - Google Patents
High-efficient recovery unit of organic amine liquid of flue gas desulfurization Download PDFInfo
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- CN111773889A CN111773889A CN202010536827.XA CN202010536827A CN111773889A CN 111773889 A CN111773889 A CN 111773889A CN 202010536827 A CN202010536827 A CN 202010536827A CN 111773889 A CN111773889 A CN 111773889A
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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
- B01D53/14—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 by absorption
- B01D53/1406—Multiple stage absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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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
- B01D53/14—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 by absorption
- B01D53/1487—Removing organic compounds
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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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
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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
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
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Abstract
The invention provides a flue gas desulfurization organic amine liquid high-efficiency recovery device, wherein a dilute amine liquid outlet pipe is arranged at the bottom of an amine liquid recovery tower, a filler section is arranged above the dilute amine liquid outlet pipe, a flue gas outlet pipe is arranged at the uppermost part of the amine liquid recovery tower, a wire mesh demister is arranged below the flue gas outlet pipe, a baffling type bubble cap tower tray component is arranged between the wire mesh demister and the filler section, the baffling type bubble cap tower tray component comprises a plurality of tray trays, each tray consists of a plurality of tray plates, a clear water inlet pipe is arranged above the uppermost tray, one end of the clear water inlet pipe is connected with the inner wall of the amine liquid recovery tower, adjacent tray plates are connected through downcomers, the downcomers are connected with the tray plate at the outermost edge of the tray, and the upper downcomer and. The invention adopts a small strand of clear water to absorb the amine liquid in the flue gas, and the recovery efficiency can reach more than 90 percent. Thereby solving the problems of large amine liquid loss and high cost in the organic amine method flue gas desulfurization.
Description
Technical Field
The invention belongs to the technical field of flue gas desulfurization, and relates to a high-efficiency recovery device for organic amine liquid in flue gas desulfurization.
Background
The problems of easy volatilization, easy loss, high price, high recovery cost and the like of organic amine liquid exist in the industrial operation process of the organic amine method flue gas desulfurization technology, and the large-scale popularization of the organic amine desulfurization is hindered. The device for recovering the mist particles carried by the organic amine liquid in the discharged flue gas and the steam thereof mainly comprises: 1, arranging an amine liquid demisting separator at the upper part of a flue gas absorption tower; 2, arranging an amine liquid recovery section filler on the upper part of the flue gas absorption tower, demisting and separating, and absorbing amine liquid by using dilute amine liquid; 3, a supergravity separator; 4 micro cyclone separator; 5 aggregation separators, etc. The common defects of the devices are that the mechanism is complex, the separation efficiency is low, moving parts are arranged, and although part of amine liquid fog particles can be removed, the amine liquid absorbs SO2 at 40-60 ℃ in an absorption tower, a plurality of amine liquid steam escapes along with flue gas, the demisting efficiency is poor, and the driving force for circularly absorbing the amine liquid by using the dilute amine liquid is small, and the steam pressure of the dilute amine liquid is low. For this reason, the overall recovery efficiency is not greater than 60%. Therefore, it is necessary to design a recycling device for amine liquid used for flue gas desulfurization with low manufacturing cost and good recycling effect.
In the sulfuric acid industry, 20189, application and optimization of an organic amine desulfurization technology introduce that the amine liquid loss is high: cansolv gives an amine solution annual consumption of 37.5t/a (4 furnaces running) and a first year of operation of 100 t/a (2 furnaces running), well beyond the design level. Through analysis, mainly because amine liquid foaming and absorption tower export do not set up the defroster, amine liquid is caused by the flue gas entrainment, and first year operation is not completely stable yet in addition, and various overhauls, leak comparatively frequently. The entrainment of the absorption tower is controlled by adding a demister, all key equipment and pipelines are maintained, the annual amine liquid consumption can be stabilized at about 52t, and the annual amine liquid consumption is still higher than the design value because the foaming coefficient of the amine liquid after long-time running is higher than the expected value, so that a small part of the amine liquid is still carried by the flue gas. The organic amine is about 5 ten thousand yuan/t, and the organic amine is lost by about 260 ten thousand yuan/year.
Environmental engineering, 2014, 32 supplants, reduction of regenerated amine desulfurization operation cost strategy analysis, introduction of large amine liquid loss: according to design requirements, 37.5t of amine liquid is supplemented to a desulfurization system every year, the actual annual normal loss amount after operation exceeds 100t, and due to the fact that the concentration (about 14 percent) of the amine liquid in the current operation is far lower than that in the design, if the concentration is maintained at the designed concentration level (20-25 percent), the expected concentration reaches 200t/a, the price of the amine liquid is about 5 ten thousand yuan/t, and the annual loss is at least 500 ten thousand yuan. The amine liquid loss is divided into loss in a normal operation state and loss in an abnormal operation state. Because the amine liquid that equipment leaked, overhauld the in-process loss belongs to loss under the abnormal operation state, this part loss volume is less, and when the system normally operated, the air current smuggled the loss volume that leads to amine liquid secretly great, to this loss, takes measures to have: adjusting the flow of flue gas; a mist catcher is additionally arranged at the top of the absorption tower; and an amine liquid recovery device is added at the bottom of the chimney.
The invention discloses an absorption tower capable of separating organic amine salt liquid drops in flue gas, which is applied for 31/12/2015, has publication number CN105457398A and is named as 'gas-liquid cyclone and absorption tower capable of separating organic amine salt liquid drops in flue gas'. By utilizing the cyclone separation principle, the flue gas entering the gas-liquid cyclone generates cyclone to form centrifugal force, so that the organic amine salt liquid drops in the flue gas are separated. The gas-liquid cyclone has complicated structure, 2-time gas distribution accelerating region, flow deflector, amine-liquid separating region, upper cyclone blades, and gas guide cap and flow blocking plate over the outlet. The absorption tower is provided with an absorption section packing layer and a gas-liquid cyclone of a gas-liquid separation device above the absorption section packing layer. In addition, the organic amine vapor entrained in the flue gas cannot be separated out in a cyclone manner.
The organic amine recovery device adopted by the invention with the application date of 2016, 8 and 10 months and the publication number of CN106268320A and the patent name of 'an organic amine desulfurization process desulfurizer recovery device and a desulfurizer recovery and utilization method' comprises a super-gravity rotating bed, a recovery tank and a solution tank. The flue gas is treated by a supergravity rotating bed, the water content is trapped, the desulfurizer is recovered, the recovered liquid is collected in a recovery tank, the entrained matters of the flue gas are circularly trapped, and the flue gas returns to a desulfurization liquid storage tank (solution tank) of a desulfurization system when the concentration of the organic amine desulfurizer in the recovered liquid reaches 5 percent. The filler of the high-gravity rotating bed is divided into two parts, wherein the upper part of the filler is an annular filler made of polypropylene, the lower part of the filler is a stainless steel baffle plate filler, and a three-blade fan is arranged between the two fillers. The disadvantages are as follows: firstly, equipment is moved, so that energy consumption is increased, and the maintenance is difficult; secondly, the structure is complex and the cost is high; thirdly, the gas-liquid contact time is short, and the organic amine absorption effect is poor.
The invention of application date 2015, 12 and 31, with publication number CN105457454A and patent name "integral absorption tower and method for separating and recovering organic amine salt carried in flue gas" provides an integral absorption tower and method for flue gas desulfurization and separating and recovering organic amine salt carried in flue gas, wherein the absorption tower comprises from bottom to top: flue gas desulfurization section, gas-liquid separation section spoiler + gas-liquid swirler + air guide cap, absorption separation section liquid distributor + packing layer and defogging separation section silk screen defroster + baffle plate defroster. The gas-liquid separation section separates organic amine salt liquid drops with larger particle sizes in the flue gas; the pulse filler of the absorption separation section further separates organic amine liquid drops in the smoke and strengthens the gas distribution effect on the smoke again; and demisting treatment in a demisting separation section. The disadvantages are as follows: the gas-liquid separation structure is complex, and the separation effect of the organic amine carried along with the steam is poor.
Disclosure of Invention
1. The technical problem to be solved is as follows:
the existing organic amine desulfurization mechanism is complex, the amine liquid separation efficiency is low, the amine liquid loss is higher, and the amine liquid recovery rate is low.
2. The technical scheme is as follows:
in order to solve the problems, the invention provides a high-efficiency recovery device for organic amine liquid in flue gas desulfurization, which comprises an amine liquid recovery tower, wherein a dilute amine liquid outlet pipe is arranged at the bottom of the amine liquid recovery tower, a filler section is arranged above the dilute amine liquid outlet pipe, a flue gas inlet pipe is arranged between the filler section and the dilute amine liquid outlet pipe, a flue gas outlet pipe is arranged at the uppermost part of the amine liquid recovery tower, a wire mesh demister is arranged below the flue gas outlet pipe, a baffling type bubble cap tray component is arranged between the wire mesh demister and the filler section, the baffling type bubble cap tray component comprises 2-6 tray trays which are arranged in parallel, each tray consists of 3-12 tray plates, a clear water inlet pipe is arranged above the uppermost tray plate, one end of the clear water inlet pipe is connected with the inner wall of the amine liquid recovery tower, and adjacent tray plates are connected through a downcomer, the downcomer is connected with the tray plate at the most edge of the tray, and the upper downcomer and the lower downcomer of each tray are positioned at two sides of the tray.
The downcomer between the first layer of trays and the second layer of trays is positioned between the most marginal trays far away from the clear water inlet pipe.
Each tower plate is provided with a plurality of bubble caps.
And a baffling port is arranged at the connection part of the tower plates on each tower tray.
On the tower plate provided with the downcomer, the downcomer is separated from the bubble cap by a partition, and the partition is provided with a baffling port.
The water outlet of the clear water inlet pipe is over against the middle tower plate of the uppermost tower tray, the edges of the tower plates are respectively provided with a left tower plate and a right tower plate, and the middle tower plate is arranged between the left tower plate and the right tower plate.
A dilute amine liquid inlet pipe is arranged between the packing section and the baffling type bubble cap tray component.
The baffled bubble cap tray assembly comprises 3 trays arranged in parallel.
Each of the trays included 4 trays.
The gas-liquid ratio of the clean water from the clean water inlet pipe is 10-30 × 103。
3. Has the advantages that:
the efficient recovery device for the organic amine liquid in flue gas desulfurization provided by the invention has the advantages of reasonable design, simple structure, simplicity and convenience in operation, low cost and easiness in large-scale popularization and use. The waste normal pressure equipment of an enterprise can be used for transformation, or a clear water washing and recovering section is added in an original dilute liquid washing and recovering tower, so that the partial pressure of the amine liquid in clear water is zero or very low, the absorption driving force is greatly enhanced, and the recovery efficiency and the quality of the amine liquid are improved.
Drawings
FIG. 1 shows an amine liquid recovery column according to the present invention.
Fig. 2 is a baffle type bubble cap tray of the present invention.
Description of reference numerals: a 1-amine liquid recovery tower; 2-a filler section; 3-a downcomer; 4-a tray; 5-wire mesh demister; 6-flue gas outlet pipe; 7-clear water inlet pipe; an 8-dilute amine liquid inlet pipe; 9-a flue gas inlet pipe; a 10-dilute amine liquid outlet pipe; 11-left tray; 12-bubble cap Dg 100-25-II; 13-middle tray; 14-clear water baffling direction; 15-right tray.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples.
As shown in figure 1, the high-efficiency recovery device for organic amine liquid in flue gas desulfurization comprises an amine liquid recovery tower 1, wherein a dilute amine liquid outlet pipe 10 is arranged at the bottom of the amine liquid recovery tower 1, a filler section 2 is arranged above the dilute amine liquid outlet pipe 10, a flue gas inlet pipe 9 is arranged between the filler section 2 and the dilute amine liquid outlet pipe 10, a flue gas outlet pipe 6 is arranged at the uppermost part of the amine liquid recovery tower 1, a wire mesh demister 5 is arranged below the flue gas outlet pipe 6, a baffling type bubble cap tray component is arranged between the wire mesh demister 5 and the filler section 3, the baffling type bubble cap tray component comprises 2-6 trays 4 which are arranged in parallel, each tray 4 consists of 3-12 trays, a clear water inlet pipe 7 is arranged above the uppermost tray 4, and one end of the clear water inlet pipe 7 is connected with the inner wall of the amine liquid recovery tower 1, the adjacent trays 4 are connected through a downcomer 3, the downcomer 3 is connected with the tray plate at the most edge of the tray 4, and the two downcomers 3 above and below each tray 4 are positioned at two sides of the tray 4.
Removal of SO2The purified flue gas enters an amine liquid recovery tower 1 through a flue gas inlet pipe 9, a filler section 2 at the lower part of the amine liquid recovery tower 1 is in countercurrent contact with a dilute amine liquid sprayed by a dilute amine liquid inlet 8, the flue gas continuously enters from bottom to top after being absorbed by part of the amine liquid, a recovery section of a baffling type bubble cap tray assembly 4 is in countercurrent contact with clear water sprayed by a clear water inlet pipe 7,the flue gas enters a wire mesh demister 5 after being absorbed by most of the amine liquid, and is discharged through a flue gas outlet pipe 6 after being carried by the fog shower.
For better effect, the downcomer 3 between the first and second layer of trays 4, 4 is located between the most marginal trays far from the clear water inlet pipe 7. This enables the uppermost layer of fresh water to flow over a large area of the tray and then through the downcomer 3 into the next tray layer 4.
In order to better contact the amine liquid with the clear water in a counter-current manner, a plurality of bubble caps 12 are arranged on each tower plate to increase the contact area.
And a baffling port is arranged at the connection part of the tower plates on each tower tray 4. The amine liquid is contacted with the clear water, and the contact time is increased after multiple baffling.
The downcomer 3 is connected with the tray plate at the most edge of the tray 4, the two downcomers 3 above and below each tray 4 are positioned at two sides of the tray 4, the downcomer 3 and the bubble cap 12 are separated by a partition on the tray plate provided with the downcomer 3, and the partition is provided with a baffling opening. The design is that the clear water on each tray 4 is deflected for a plurality of times and then enters the next tray from the downcomer 3.
The water outlet of the clear water inlet pipe 7 is over against the middle tower plate 13 of the tray 4 on the uppermost layer, the edges of the tray are respectively provided with a left tray 11 and a right tray 15, and the middle tower plate 13 is arranged between the left tray 11 and the right tray 15. The design is designed to ensure that the clean water of the first layer of tower tray 4 can also pass through multiple baffling, and is better contacted with the amine liquid flowing upwards in a counter-current mode.
Examples
The baffled bubble cap tray assembly comprises 3 parallel trays 4, each of which comprises 4 trays, as shown in fig. 2, wherein the leftmost tray is a left tray 11, the rightmost tray is a right tray 15, and the middle 2 trays are middle trays 13. Each tray is provided with a plurality of bubble caps 12, in the embodiment, in the first layer of tray, there are 9 bubble caps in the left tray 11, there are 32 bubble caps 12 in the middle tray 13, and the right tray 15 has the downcomer 3, so there are less bubble caps 12, 5 bubble caps, 46 bubble caps in total, and the second layer downcomer 3 is located on the left tray, but the bubble caps 12 of each tray are 46.
The clear water inlet pipe 7 is positioned at the left side, the downcomer between the first layer of trays and the second layer of trays is connected with the leftmost tray, and in order that the clear water can be deflected on the first layer of trays for a plurality of times, as can be seen from fig. 1, the clear water inlet pipe 7 is aligned with the middle tray 13 and is positioned at the left part of the middle tray 13.
As can be seen from fig. 2, the direction of deflection 14 of the fresh water on each tray indicates that the fresh water is deflected 7 times in the trays of this embodiment to the downcomer 3 into the next tray.
Removal of SO2The purified flue gas enters an amine liquid recovery tower 1 through a flue gas inlet pipe 9, the flue gas amount is 12000m3/h, and SO in the flue gas2The content of 18000mg/m3 is in countercurrent contact with dilute amine liquid sprayed from a dilute amine liquid inlet 8 in a filler section 2 at the lower part of an amine liquid recovery tower 1, the flue gas continuously enters from bottom to top after being absorbed by part of the amine liquid, the flue gas is in countercurrent contact with clean water sprayed from a clean water inlet pipe 7 through three trays in a baffling type bubble cap tray assembly 4, the structure of the bubble cap tray assembly 4 ensures that the contact area of the clean water and the amine liquid is large, the contact time is long, the flue gas enters a wire mesh demister 5 after being absorbed by most of the amine liquid, the flue gas is discharged from a flue gas outlet pipe 6 after being entrained by mist is removed, and when the2The content is less than or equal to 120mg/m3。
And dissolving the amine liquid with the volume fraction of about 90% in the washed gas phase in water, wherein a dilute amine liquid outlet pipe 10 is arranged at the bottom of the amine liquid recovery tower 1, and the dilute liquid enters a dilute liquid tank from the dilute amine liquid outlet pipe 10.
Claims (10)
1. The utility model provides a high-efficient recovery unit of organic amine liquid of flue gas desulfurization, includes amine liquid recovery tower (1), the bottom of amine liquid recovery tower (1) is equipped with rare amine liquid outlet pipe (10), the top of rare amine liquid outlet pipe (10) is equipped with filler section (2), be equipped with flue gas inlet pipe (9) between filler section (2) and rare amine liquid outlet pipe (10), the top of amine liquid recovery tower (1) is provided with flue gas outlet pipe (6), flue gas outlet pipe (6) below is equipped with silk screen demister (5), its characterized in that: a baffling type bubble cap tray component is arranged between the wire mesh demister (5) and the filler section (3), the baffling type bubble cap tray component comprises 2-6 trays (4) which are arranged in parallel, each tray (4) consists of 3-12 trays, a clear water inlet pipe (7) is arranged above the uppermost tray (4), one end of the clear water inlet pipe (7) is connected with the inner wall of the amine liquid recovery tower (1), the adjacent trays (4) are connected through a downcomer (3), the downcomer (3) is connected with the tray at the edge of the tray (4), and the upper downcomer and the lower downcomer (3) of each tray (4) are positioned on two sides of the tray (4).
2. The high-efficiency recovery device of organic amine liquid for flue gas desulfurization according to claim 1, characterized in that: the downcomer (3) between the first layer of trays (4) and the second layer of trays (4) is positioned between the most marginal trays far away from the clear water inlet pipe (7).
3. The high-efficiency recovery device of organic amine liquid for flue gas desulfurization according to claim 1, characterized in that: each of the trays is provided with a plurality of bubble caps (12).
4. The high-efficiency recovery device of organic amine liquid for flue gas desulfurization according to claim 1, characterized in that: and a baffling port is arranged at the connection part of the tower plates on each tower tray (4).
5. The high-efficiency recovery device of organic amine liquid for flue gas desulfurization according to claim 3, characterized in that: the down-flow pipe (3) and the bubble cap (12) are separated by a partition on the tower plate provided with the down-flow pipe (3), and the partition is provided with a baffling port.
6. The high-efficiency recovery device for organic amine liquid in flue gas desulfurization according to any one of claims 1 to 5, characterized in that: the water outlet of the clear water inlet pipe (7) is over against the middle tower plate (13) of the uppermost tower tray (4), the edges of the tower plates are respectively a left tower plate (11) and a right tower plate (15), and the middle tower plate (13) is arranged between the left tower plate (11) and the right tower plate (15).
7. The high-efficiency recovery device for organic amine liquid in flue gas desulfurization according to any one of claims 1 to 5, characterized in that: a dilute amine liquid inlet pipe (8) is arranged between the filler section (2) and the baffling type bubble cap tray component.
8. The high-efficiency recovery device for organic amine liquid in flue gas desulfurization according to any one of claims 1 to 5, characterized in that: the baffled bubble cap tray assembly comprises 3 trays (4) arranged in parallel.
9. The high-efficiency recovery device for organic amine liquid in flue gas desulfurization according to any one of claims 1 to 5, characterized in that: each of said trays (4) comprises 4 trays.
10. The high-efficiency recovery device for organic amine liquid in flue gas desulfurization according to any one of claims 1 to 5, characterized in that the gas-liquid ratio of the clean water from the clean water inlet pipe (7) is (10-30) × 103。
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| CN202010536827.XA CN111773889A (en) | 2020-06-12 | 2020-06-12 | High-efficient recovery unit of organic amine liquid of flue gas desulfurization |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742178A (en) * | 2021-01-04 | 2021-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Flue gas desulfurization and SCR denitration combined system and flue gas treatment process |
| CN112742183A (en) * | 2021-01-04 | 2021-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Flue gas desulfurization absorption system and process thereof |
| CN112774421A (en) * | 2021-01-04 | 2021-05-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Wet flue gas desulfurization and denitrification system and process |
-
2020
- 2020-06-12 CN CN202010536827.XA patent/CN111773889A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742178A (en) * | 2021-01-04 | 2021-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Flue gas desulfurization and SCR denitration combined system and flue gas treatment process |
| CN112742183A (en) * | 2021-01-04 | 2021-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Flue gas desulfurization absorption system and process thereof |
| CN112774421A (en) * | 2021-01-04 | 2021-05-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Wet flue gas desulfurization and denitrification system and process |
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