CN113457411B - Dry desulfurization and denitrification process equipment and operation method thereof - Google Patents
Dry desulfurization and denitrification process equipment and operation method thereof Download PDFInfo
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- CN113457411B CN113457411B CN202110869549.4A CN202110869549A CN113457411B CN 113457411 B CN113457411 B CN 113457411B CN 202110869549 A CN202110869549 A CN 202110869549A CN 113457411 B CN113457411 B CN 113457411B
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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
- B01D53/76—Gas phase processes, e.g. by using aerosols
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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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/06—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of dry desulfurization and denitrification, and discloses dry desulfurization and denitrification process equipment, which comprises an adsorption tower, wherein a motor is fixedly arranged at the upper part of an inner cavity of the adsorption tower through a frame, an output shaft of the motor is fixedly sleeved with a rotating frame, the outer side of the bottom of the rotating frame is fixedly provided with a connecting rod, the bottom of the connecting rod is fixedly provided with a rotary drum, the inner wall of the rotary drum is fixedly sleeved with a special-shaped box, the inner side of the special-shaped box is fixedly provided with a speed plate, and the bottom of the adsorption tower is fixedly sleeved with an active coke discharging pipe. According to the dry desulfurization and denitrification process equipment and the operation method thereof, the rotating frame is driven to rotate through the operation of the motor, the connecting rod is utilized to drive the rotary drum and the special-shaped box to rotate, SO that the speed plate is driven to rotate in the inner cavity of the adsorption tower, the speed of up-and-down movement of active coke in the adsorption tower is regulated, the process adjustment requirements of flue gas when SO2 and NOx contents are different are met, and the practicability of the equipment is improved.
Description
Technical Field
The invention relates to the technical field of dry desulfurization and denitrification, in particular to dry desulfurization and denitrification process equipment and an operation method thereof.
Background
The dry desulfurization and denitrification is also called dry flue gas desulfurization and denitrification, which is characterized in that powdery or granular absorbent, adsorbent or catalyst is used for removing gas containing sulfide in flue gas, and has the advantages of simple process, no sewage and waste acid treatment problem, low energy consumption, high flue gas temperature after purification, contribution to chimney exhaust diffusion, no white smoke phenomenon, no secondary heating of the purified flue gas, low corrosiveness, high purification degree of dry desulfurization and denitrification, and capability of removing organic sulfur and nitrate.
The existing dry desulfurization and denitrification processes mostly adopt an active coke adsorption method, wherein the active coke adsorption method is a technology for simultaneously desulfurizing and denitrifying flue gas by using active coke, and the traditional dry flue gas desulfurization and denitrification device based on an active coke adsorption tower has the defects that the active coke adsorption tower is not provided with a structure for controlling the active coke rate, SO that the active coke adsorption tower can not adjust the up-and-down moving rate of the active coke in the tower according to the different contents of SO2 and NOx in the flue gas.
Disclosure of Invention
(one) solving the technical problems
The invention provides dry desulfurization and denitrification process equipment and an operation method thereof, which have the advantage of being convenient for adjusting the up-and-down moving speed of active coke in a tower according to the different contents of SO2 and NOx in flue gas, and solve the problems in the prior art.
(II) technical scheme
The invention provides the following technical scheme: the utility model provides a dry desulfurization denitration process equipment, includes the adsorption tower, the upper portion of adsorption tower inner chamber has the motor through frame fixed mounting, the fixed swivel mount that has cup jointed of output shaft of motor, the outside fixed mounting of swivel mount bottom has the connecting rod, the bottom fixed mounting of connecting rod has the rotary drum, the inner wall fixed special-shaped case that has cup jointed of rotary drum, the inboard fixed mounting of special-shaped case has the speed board, the fixed active burnt pipe of row that has cup jointed in bottom of adsorption tower, the fixed active burnt pipe of having cup jointed in top of adsorption tower, the fixed ammonia trachea that has cup jointed in one side of adsorption tower, the upper and lower side of adsorption tower opposite side has fixedly cup jointed flue gas exit tube and flue gas inlet tube respectively.
The ammonia gas exhaust port is formed in the inner side of the special-shaped box, the ammonia gas pipe is communicated with the rotary drum, the rotary drum is communicated with the special-shaped box, and the outer side of the rotary drum is in contact with the inner wall of the adsorption tower.
The adsorption tower comprises an adsorption tower, wherein a clamping groove is formed in the inner wall of the adsorption tower, a clamping plate is movably sleeved in an inner cavity of the clamping groove, and the bottom of the clamping plate is fixedly arranged on the top of the rotary drum.
Carefully chosen, the fixed rose box that has cup jointed of one end of row active burnt pipe, the fixed pipe that has cup jointed of one side of rose box, there is the top cap at the top of rose box through bolt fixed mounting, the bottom fixed mounting of top cap has the filter plate.
Six filter plates are uniformly arranged at the bottom of the top cover, and the filter plates are positioned in the inner cavity of the filter box.
The whole of the special-shaped box is in a spiral shape, and the inner side of the special-shaped box is provided with speed plates distributed along the thread track.
The ammonia gas purifying device is characterized in that a motor, a rotary drum and a special-shaped box are arranged on the upper side and the lower side of the inner cavity of the adsorption tower respectively, and two sides of one side of the ammonia gas pipe are connected with the rotary drum.
An operation method of dry desulfurization and denitrification process equipment comprises the following operation steps:
the flue gas is injected into the inner cavity of the adsorption tower through the flue gas inlet pipe, the ammonia gas enters the inner cavity of the adsorption tower through the ammonia gas pipe, the active coke enters the inner cavity of the adsorption tower through the active coke inlet pipe, the active coke has micropore adsorption effect, and ammonia gas is arranged in the adsorption tower to separate and eliminate sulfur and nitrate in the flue gas;
the rotating frame is driven to rotate through the operation of the motor, and the connecting rod is used for driving the rotary drum and the special-shaped box to rotate, SO that the speed plate is driven to rotate in the inner cavity of the adsorption tower, the speed of up-and-down movement of active coke in the adsorption tower is regulated, and the process adjustment requirement when the SO2 and NOx contents in flue gas are different is met;
through the communication among the ammonia pipe, the rotary drum and the special-shaped box, the ammonia enters the inner cavity of the adsorption tower from the ammonia discharge port on the special-shaped box through the ammonia pipe and the rotary drum, and the adsorption tower can be uniformly filled with the ammonia along with the rotation of the special-shaped box due to the shape characteristics of the special-shaped box, so that the reaction is more sufficient;
one side of the active coke discharging pipe is provided with a filter box and a filter plate, so that the active coke after reaction enters the filter box, the active coke can be filtered, the situation that the guide pipe is blocked due to excessive active coke ash particles associated with the active coke is avoided, and the subsequent regeneration efficiency of the active coke is influenced.
(III) beneficial effects
The invention has the following beneficial effects:
1. according to the dry desulfurization and denitrification process equipment and the operation method thereof, the rotating frame is driven to rotate through the operation of the motor, the connecting rod is utilized to drive the rotary drum and the special-shaped box to rotate, SO that the speed plate is driven to rotate in the inner cavity of the adsorption tower, the speed of up-and-down movement of active coke in the adsorption tower is regulated, the process adjustment requirements of flue gas when SO2 and NOx contents are different are met, and the practicability of the equipment is improved.
2. According to the dry desulfurization and denitrification process equipment and the operation method thereof, through communication among the ammonia pipe, the rotary drum and the special-shaped box, ammonia enters the inner cavity of the adsorption tower from the ammonia discharge port on the special-shaped box through the ammonia pipe and the rotary drum, and due to the shape characteristics of the special-shaped box, the adsorption tower can be uniformly filled with the ammonia along with the rotation of the special-shaped box, so that the reaction is more sufficient.
3. According to the dry desulfurization and denitrification process equipment and the operation method thereof, the filter box and the filter plate are arranged on one side of the active coke discharging pipe, so that the active coke after reaction enters the filter box, the active coke can be filtered, the condition that a conduit is blocked due to excessive quantity of active coke ash particles associated with the active coke is avoided, and the subsequent regeneration efficiency of the active coke is influenced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic perspective view of an explosion between an adsorption tower and a rotating frame according to the present invention;
FIG. 3 is a schematic cross-sectional perspective view of the adsorption tower of the present invention;
FIG. 4 is a schematic perspective view of an explosion between a shaped tank and a velocity plate of the present invention;
FIG. 5 is a schematic perspective view of a card slot according to the present invention;
fig. 6 is a schematic perspective view of an explosion between the filter housing and the top cover of the present invention.
In the figure: 1. an adsorption tower; 2. a motor; 3. a rotating frame; 4. a connecting rod; 5. a rotating drum; 6. a special-shaped box; 7. a rate plate; 8. active coke discharging pipe; 9. feeding active coke tube; 10. an ammonia gas pipe; 11. a flue gas outlet pipe; 12. a flue gas inlet pipe; 13. an ammonia gas discharge port; 14. a clamping groove; 15. a clamping plate; 16. a filter box; 17. a conduit; 18. a top cover; 19. a filter plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, a dry desulfurization and denitrification process device comprises an adsorption tower 1, wherein a clamping groove 14 is formed in the inner wall of the adsorption tower 1, a clamping plate 15 is movably sleeved in an inner cavity of the clamping groove 14, the bottom of the clamping plate 15 is fixedly arranged on the top of a rotary drum 5, the clamping plate 15 on the top of the rotary drum 5 is movably connected with the clamping groove 14 through the adsorption tower 1, the tightness between the adsorption tower 1 and the rotary drum 5 is improved, the rotation stability of the rotary drum 5 is improved, a motor 2, the rotary drum 5 and a special-shaped box 6 are arranged on the upper side and the lower side of the inner cavity of the adsorption tower 1, two sides of one side of an ammonia pipe 10 are connected with the rotary drum 5, a motor 2, the rotary drum 5 and the special-shaped box 6 are arranged on the upper side and the lower side of the inner cavity of the adsorption tower 1, the active coke rate on the upper side and the lower side of the inner cavity of the adsorption tower 1 can be controlled respectively, the motor 2 is fixedly arranged on the upper part of the inner cavity of the adsorption tower 1 through a frame, the output shaft of the motor 2 is fixedly sleeved with a rotating frame 3, the outer side of the bottom of the rotating frame 3 is fixedly provided with a connecting rod 4, the bottom of the connecting rod 4 is fixedly provided with a rotary drum 5, the inner wall of the rotary drum 5 is fixedly sleeved with a special-shaped box 6, the inner side of the special-shaped box 6 is provided with an ammonia gas discharge port 13, an ammonia gas pipe 10 is communicated with the rotary drum 5, the rotary drum 5 is communicated with the special-shaped box 6, the outer side of the rotary drum 5 is contacted with the inner wall of the adsorption tower 1, through the communication among the ammonia gas pipe 10, the rotary drum 5 and the special-shaped box 6, the ammonia gas enters the inner cavity of the adsorption tower 1 from the ammonia gas discharge port 13 on the special-shaped box 6 through the ammonia gas pipe 10 and the rotary drum 5, due to the shape characteristic of the special-shaped box 6 and along with the rotation of the special-shaped box 6, the adsorption tower 1 can be uniformly filled with the ammonia gas, the reaction is more sufficient, the whole special-shaped box 6 is in a spiral shape, the inner side of the special-shaped box 6 is provided with a speed plate 7 distributed along a thread track, the whole through special-shaped box 6 is the spiral shape, and the inboard of special-shaped box 6 is equipped with the speed board 7 along screw thread orbit distribution, be convenient for all face the active burnt in through special-shaped box 6 and control the speed, special-shaped box 6's inboard fixed mounting has speed board 7, the fixed cover of bottom of adsorption tower 1 has arranged active burnt pipe 8, the fixed filter tank 16 that has cup jointed of one end of arranging active burnt pipe 8, the fixed pipe 17 that has cup jointed of one side of filter tank 16, there is top cap 18 at the top of filter tank 16 through bolt fixed mounting, the bottom fixed mounting of top cap 18 has filter plate 19, be equipped with filter tank 16 and filter plate 19 through one side of arranging active burnt pipe 8, make the active burnt entering into the filter tank 16 after the reaction, can filter active burnt, the volume of active burnt ash particle that has avoided the active burnt to have is too much, lead to the condition that the pipe 17 appears blockking up, the subsequent regeneration efficiency of active burnt, the bottom of top cap 18 evenly is equipped with six filter plates 19, filter plate 19 are located the inner chamber of filter plate 16, the bottom through top cap 18 evenly is equipped with six filter plates 19, the bottom of being convenient for thoroughly with active burnt pipe 1 and the active burnt gas separation pipe 1 has been cup jointed down, the active tower 1 has been fixed to have been cup jointed to the active flue gas absorption tower 1, the absorption tower 1 has been fixed to have the top gas absorption tower 1 respectively, the side of the absorption tower 1 has been fixed to have the active gas absorption tower 1.
An operation method of dry desulfurization and denitrification process equipment comprises the following operation steps:
the flue gas is injected into the inner cavity of the adsorption tower 1 through the flue gas inlet pipe 12, the ammonia gas enters the inner cavity of the adsorption tower 1 through the ammonia gas pipe 10, the active coke enters the inner cavity of the adsorption tower 1 through the active coke inlet pipe 9, the active coke has micropore adsorption effect, and ammonia gas is arranged in the adsorption tower 1, so that sulfur and nitrate in the flue gas are separated and eliminated;
the rotating frame 3 is driven to rotate through the operation of the motor 2, and the rotating drum 5 and the special-shaped box 6 are driven to rotate through the connecting rod 4, SO that the speed plate 7 is driven to rotate in the inner cavity of the adsorption tower 1, the speed of up-and-down movement of active coke in the adsorption tower 1 is regulated, and the process adjustment requirement when the SO2 and NOx contents in flue gas are different is met;
through the communication among the ammonia pipe 10, the rotary drum 5 and the special-shaped box 6, ammonia gas enters the inner cavity of the adsorption tower 1 from the ammonia gas discharge port 13 on the special-shaped box 6 through the ammonia pipe 10 and the rotary drum 5, and the adsorption tower 1 can be uniformly filled with the ammonia gas along with the rotation of the special-shaped box 6 due to the shape characteristics of the special-shaped box 6, so that the reaction is more sufficient;
through arranging active burnt pipe 8 one side be equipped with rose box 16 and filter plate 19 for the active burnt after the reaction enters into rose box 16 in, can filter active burnt, avoided the active burnt ash granule's that active burnt is related volume too much, lead to the pipe 17 to appear the condition of jam, influence active burnt follow-up regeneration efficiency can.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The dry desulfurization and denitrification process equipment comprises an adsorption tower (1), and is characterized in that: the upper part and the lower part of the inner cavity of the adsorption tower (1) are fixedly provided with a motor (2) through a rack, an output shaft of the motor (2) is fixedly sleeved with a rotating frame (3), the outer side of the bottom of the rotating frame (3) is fixedly provided with a connecting rod (4), the bottom of the connecting rod (4) is fixedly provided with a rotary drum (5), the inner wall of the rotary drum (5) is fixedly sleeved with a special-shaped box (6), the inner side of the special-shaped box (6) is fixedly provided with a speed plate (7), the bottom of the adsorption tower (1) is fixedly sleeved with an active coke discharging pipe (8), the top of the adsorption tower (1) is fixedly sleeved with an active coke feeding pipe (9), one side of the adsorption tower (1) is fixedly sleeved with an ammonia pipe (10), and the upper side and the lower side of the other side of the adsorption tower (1) are fixedly sleeved with a flue gas outlet pipe (11) and a flue gas inlet pipe (12) respectively;
the ammonia gas adsorption device comprises an adsorption tower (1), an ammonia gas pipe (10) and a rotary drum (5), wherein an ammonia gas outlet (13) is formed in the inner side of the special-shaped box (6), the ammonia gas pipe (10) is communicated with the rotary drum (5), the rotary drum (5) is communicated with the special-shaped box (6), and the outer side of the rotary drum (5) is in contact with the inner wall of the adsorption tower (1);
the whole of the special-shaped box (6) is in a spiral shape, and a speed plate (7) distributed along a thread track is arranged on the inner side of the special-shaped box (6);
the upper side and the lower side of the inner cavity of the adsorption tower (1) are respectively provided with a motor (2), a rotary drum (5) and a special-shaped box (6), and two ends of one side of the ammonia pipe (10) are respectively connected with the rotary drum (5);
the inner wall of the adsorption tower (1) is provided with a clamping groove (14), an inner cavity of the clamping groove (14) is movably sleeved with a clamping plate (15), and the bottom of the clamping plate (15) is fixedly arranged on the top of the rotary drum (5).
2. The dry desulfurization and denitrification process equipment according to claim 1, wherein: the filter is characterized in that one end of the active coke discharging pipe (8) is fixedly sleeved with a filter box (16), one side of the filter box (16) is fixedly sleeved with a guide pipe (17), the top of the filter box (16) is fixedly provided with a top cover (18) through a bolt, and the bottom of the top cover (18) is fixedly provided with a filter plate (19).
3. The dry desulfurization and denitrification process equipment according to claim 2, wherein: six filter plates (19) are uniformly arranged at the bottom of the top cover (18), and the filter plates (19) are positioned in the inner cavity of the filter box (16).
4. A method of operating a dry desulfurization and denitrification process apparatus according to any one of claims 1 to 3, wherein: the method comprises the following operation steps:
the flue gas is injected into the inner cavity of the adsorption tower (1) through the flue gas inlet pipe (12), the ammonia gas enters the inner cavity of the adsorption tower (1) through the ammonia gas pipe (10), the active coke enters the inner cavity of the adsorption tower (1) through the active coke inlet pipe (9), the active coke has micropore adsorption, and ammonia gas is arranged in the adsorption tower (1) to separate and eliminate sulfur and nitrate in the flue gas;
the rotating frame (3) is driven to rotate through the operation of the motor (2), and the rotating drum (5) and the special-shaped box (6) are driven to rotate through the connecting rod (4), SO that the speed plate (7) is driven to rotate in the inner cavity of the adsorption tower (1), the up-and-down moving speed of active coke in the adsorption tower (1) is regulated, and the process adjustment requirement when the SO2 and NOx contents in flue gas are different is met;
through the communication among the ammonia pipe (10), the rotary drum (5) and the special-shaped box (6), ammonia gas enters the inner cavity of the adsorption tower (1) from the ammonia gas discharge port (13) on the special-shaped box (6) through the ammonia pipe (10) and the rotary drum (5), and the adsorption tower (1) can be uniformly filled with the ammonia gas along with the rotation of the special-shaped box (6) due to the shape characteristics of the special-shaped box (6), so that the reaction is more sufficient;
through arranging one side of active burnt pipe (8) and being equipped with rose box (16) and filter plate (19) for in the active burnt entering rose box (16) after the reaction, can filter active burnt, avoided the active burnt ash particle's that active burnt is related quantity too much, lead to pipe (17) to appear blocking up the condition, influence active burnt follow-up regeneration efficiency can.
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| CN202110869549.4A CN113457411B (en) | 2021-07-30 | 2021-07-30 | Dry desulfurization and denitrification process equipment and operation method thereof |
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| CN202110869549.4A CN113457411B (en) | 2021-07-30 | 2021-07-30 | Dry desulfurization and denitrification process equipment and operation method thereof |
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| CN113457411A CN113457411A (en) | 2021-10-01 |
| CN113457411B true CN113457411B (en) | 2023-10-20 |
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| CN114950055B (en) * | 2022-06-17 | 2023-12-19 | 安徽顺达环保科技股份有限公司 | Dry desulfurization and denitrification device for cement kiln flue gas and implementation method thereof |
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| CN102895839A (en) * | 2012-10-17 | 2013-01-30 | 艾淑艳 | Device and method for performing integrated purification on smoke |
| CN110585875A (en) * | 2019-10-11 | 2019-12-20 | 安徽天顺环保设备股份有限公司 | High-efficient boiler dust removal SOx/NOx control device |
| CN110585857A (en) * | 2019-10-11 | 2019-12-20 | 安徽天顺环保设备股份有限公司 | Dry flue gas desulfurization and denitrification device |
| CN212348043U (en) * | 2020-05-25 | 2021-01-15 | 山东华拓节能环保科技有限公司 | Flue gas low-temperature dry desulfurization and denitrification reaction device |
| CN213725716U (en) * | 2020-07-30 | 2021-07-20 | 湖北大清科技有限公司 | Dry flue gas desulfurization and denitrification device |
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- 2021-07-30 CN CN202110869549.4A patent/CN113457411B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102895839A (en) * | 2012-10-17 | 2013-01-30 | 艾淑艳 | Device and method for performing integrated purification on smoke |
| CN110585875A (en) * | 2019-10-11 | 2019-12-20 | 安徽天顺环保设备股份有限公司 | High-efficient boiler dust removal SOx/NOx control device |
| CN110585857A (en) * | 2019-10-11 | 2019-12-20 | 安徽天顺环保设备股份有限公司 | Dry flue gas desulfurization and denitrification device |
| CN212348043U (en) * | 2020-05-25 | 2021-01-15 | 山东华拓节能环保科技有限公司 | Flue gas low-temperature dry desulfurization and denitrification reaction device |
| CN213725716U (en) * | 2020-07-30 | 2021-07-20 | 湖北大清科技有限公司 | Dry flue gas desulfurization and denitrification device |
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