CN210814627U - Equipment for full-tower dehydration and replacement of all slurry in wet desulphurization absorption tower - Google Patents
Equipment for full-tower dehydration and replacement of all slurry in wet desulphurization absorption tower Download PDFInfo
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- CN210814627U CN210814627U CN201921523679.7U CN201921523679U CN210814627U CN 210814627 U CN210814627 U CN 210814627U CN 201921523679 U CN201921523679 U CN 201921523679U CN 210814627 U CN210814627 U CN 210814627U
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Abstract
The utility model discloses an equipment of full tower dehydration of wet flue gas desulfurization absorption tower thick liquid, the whole thick liquid of replacement, include: a first unit desulfurization absorption tower and a second unit desulfurization absorption tower; a filtrate assembly, a recovery assembly and an emergency slurry tank assembly; the utility model discloses a when shutting down, with the interior whole thick liquids dehydration of absorption tower, then the sediment at the bottom of the clearance tower can be in 2 days with all "poisoned" thick liquids of absorption tower all through the dehydration separation for: gypsum, filtrate water and impurities at the bottom of the tower. The filtrate water can be stored in the accident slurry tank, when the unit is restarted, the filtrate water and the industrial water are used for pulping again, the gypsum is comprehensively utilized or discarded, and the impurities are pulled and transported to a storage place.
Description
The technical field is as follows:
the utility model relates to an absorption tower thick liquid dehydration technical field specifically is a wet flue gas desulfurization absorption tower thick liquid is whole to be dehydrated, the equipment of the whole thick liquid of replacement.
Background art:
in recent years, the quality deterioration of limestone-gypsum wet desulfurization absorption tower slurry frequently occurs, and the slurry poisoning commonly occurs. The normal operation of the desulfurization environmental protection system is seriously influenced.
When environmental protection management is not tight, desulfurization system can arrange thick liquid, replacement thick liquid to the external world, and thick liquid quality promotes after the resetting, and system reliability improves. In recent years, the form of illegal activities is strictly prohibited. The conventional desulfurization system does not have a function of dehydrating the entire slurry of the absorption tower. When the machine is stopped for maintenance, the slurry of the absorption tower is discharged to the accident box for storage, and the slurry is guided back to the absorption tower for recycling when the machine set is started. The slurry in the absorption tower cannot be discharged and cannot be replaced for a long time, and as a result, the quality is deteriorated and the slurry is poisoned, and finally the problems of the efficiency reduction of a desulfurization system, the difficulty in gypsum dehydration and the like are caused.
The utility model has the following contents:
an object of the utility model is to provide a whole thick liquid dehydration replacement equipment of desulfurization absorption tower is in order to solve above-mentioned background art problem.
The utility model discloses by following technical scheme implement: the utility model provides a wet flue gas desulfurization absorption tower thick liquid is whole to be dehydrated, the whole equipment of thick liquid of replacement, includes:
a first unit desulfurization absorption tower and a second unit desulfurization absorption tower;
the filter assembly comprises a first vacuum belt dewatering system and a second vacuum belt dewatering system; the slurry outlet of the first unit desulfurization absorption tower is communicated with an eighth pipeline, the eighth pipeline is communicated with a fifth pipeline, and two ends of the fifth pipeline are respectively communicated with the liquid inlets of the first vacuum belt dehydration system and the second vacuum belt dehydration system; the slurry outlet of the second unit desulfurization absorption tower is communicated with an eleventh pipeline, the eleventh pipeline is communicated with a twelfth pipeline, and two ends of the twelfth pipeline are respectively communicated with the liquid inlets of the first vacuum belt dehydration system and the second vacuum belt dehydration system; filtrate outlets of the first vacuum belt dewatering system and the second vacuum belt dewatering system are communicated with a sixth pipeline;
the recovery assembly comprises a recovery water tank, a recovery water pump, a third pipeline, a fourth pipeline, a tenth pipeline, a first liquid distribution pipe, a second liquid distribution pipe, a first electric isolation door and a second electric isolation door; the water inlet of the recovery water pump is communicated with the interior of the recovery water tank through a third pipeline; a water outlet of the recovery water pump is communicated with a fourth pipeline, the fourth pipeline is respectively communicated with a second unit desulfurization absorption tower and a first unit desulfurization absorption tower through a first liquid distribution pipe and a second liquid distribution pipe, and the fourth pipeline is communicated with an accident slurry tank through a tenth pipeline;
an emergency slurry tank assembly comprising an emergency slurry tank, an emergency slurry return pump, a first pipeline, a second pipeline, and a ninth pipeline; one side of the accident slurry tank is communicated with a fourth pipeline through a tenth pipeline; the accident slurry tank is provided with an accident slurry return pump; and a water outlet of the accident slurry return pump is communicated with a first pipeline, and the first pipeline is connected with a recovery water tank through a ninth pipeline.
Preferably, the volume of the accident slurry tank is 80% -100% of the volume of the first unit desulfurization absorption tower.
Preferably, the water inlet of the accident slurry return pump is communicated with the accident slurry tank through a second pipeline; and the water outlet of the accident slurry return pump is respectively communicated with the liquid inlets of the first unit desulfurization absorption tower and the second unit desulfurization absorption tower through first pipelines.
Preferably, one side of the first liquid distribution pipe is provided with a first electric isolation door, and one side of the second liquid distribution pipe is provided with a second electric isolation door.
Preferably, side-feeding type stirrers are arranged inside the first unit desulfurization absorption tower and the second unit desulfurization absorption tower.
Preferably, the number of the recovery water pumps is three.
Preferably, two sides of the fifth pipeline and two sides of the twelfth pipeline are both provided with electric valves; the sixth pipeline is communicated with the recovery water tank through a seventh pipeline; one side of the first pipeline is communicated with the recovery water tank through a ninth pipeline.
The utility model has the advantages that: the utility model discloses a when shutting down, with the interior whole thick liquids dehydration of absorption tower, then the sediment at the bottom of the clearance tower can be in 2 days with all "poisoned" thick liquids of absorption tower all through the dehydration separation for: gypsum, filtrate water and impurities at the bottom of the tower. The filtrate water can be stored in the accident slurry tank, when the unit is restarted, the filtrate water and the industrial water are used for pulping again, the gypsum is comprehensively utilized or discarded, and the impurities are pulled and transported to a storage place.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a first unit desulfurization absorption tower; 2. a second unit desulfurization absorption tower; 3. a recovery water tank; 4. an accident slurry tank; 5. a first vacuum belt dewatering system; 6. a second vacuum belt dewatering system; 7. an accident slurry return pump; 8. a first conduit; 9. a second conduit; 10. A water recovery pump; 11. a third pipeline; 12. a fourth conduit; 13. a first liquid dividing pipe; 14. a second liquid dividing pipe; 15. a first electrically powered isolation door; 16. a second electrically powered isolation door; 17. a fifth pipeline; 18. a sixth pipeline; 19. a seventh pipe; 20. an eighth conduit; 21. a side entry agitator; 22. a ninth conduit; 23. a filtrate assembly; 24. a recovery assembly; 25. an emergency slurry tank assembly; 26. an electrically operated valve; 27. a tenth conduit; 28. an eleventh pipe; 29. a twelfth duct.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Examples
Referring to fig. 1, the present invention provides: the utility model provides a wet flue gas desulfurization absorption tower thick liquid is whole to be dehydrated, the whole equipment of thick liquid of replacement, includes:
a first unit desulfurization absorption tower 1 and a second unit desulfurization absorption tower 2;
a filtrate assembly 23, wherein the filtrate assembly 23 comprises a first vacuum belt dewatering system 5 and a second vacuum belt dewatering system 6; the slurry outlet of the first unit desulfurization absorption tower 1 is communicated with an eighth pipeline 20, the eighth pipeline 20 is communicated with a fifth pipeline 17, and two ends of the fifth pipeline 17 are respectively communicated with the liquid inlets of the first vacuum belt dehydration system 5 and the second vacuum belt dehydration system 6; an eleventh pipeline 28 is communicated with a slurry outlet of the second unit desulfurization absorption tower 2, the eleventh pipeline 28 is communicated with a twelfth pipeline 29, and two ends of the twelfth pipeline 29 are respectively communicated with liquid inlets of the first vacuum belt dehydration system 5 and the second vacuum belt dehydration system 6; filtrate discharge ports of the first vacuum belt dewatering system 5 and the second vacuum belt dewatering system 6 are communicated with a sixth pipeline 18;
a recovery assembly 24, wherein the recovery assembly 24 comprises a recovery water tank 3, a recovery water pump 10, a third pipeline 11, a fourth pipeline 12, a tenth pipeline 27, a first liquid dividing pipe 13, a second liquid dividing pipe 14, a first electric isolation door 15 and a second electric isolation door 16; the recovery water tank 3 is provided with a recovery water pump 10, and a water inlet of the recovery water pump 10 is communicated with the interior of the recovery water tank 3 through a third pipeline 11; a water outlet of the recovery water pump 10 is communicated with a fourth pipeline 12, the fourth pipeline 12 is respectively communicated with a second unit desulfurization absorption tower 2 and a first unit desulfurization absorption tower 1 through a first liquid distribution pipe 13 and a second liquid distribution pipe 14, and the fourth pipeline 12 is communicated with the accident slurry tank 4 through a tenth pipeline 27;
an emergency slurry tank assembly 25, said emergency slurry tank assembly 25 comprising an emergency slurry tank 4, an emergency slurry return pump 7, a first pipe 8, a second pipe 9 and a ninth pipe 22; one side of the accident slurry tank 4 is communicated with the fourth pipeline 12 through a tenth pipeline 27; the accident slurry tank 4 is provided with an accident slurry return pump 7; the water outlet of the accident slurry return pump 7 is communicated with a first pipeline 8, and the first pipeline 8 is connected with the recovery water tank 3 through a ninth pipeline 22.
Specifically, the volume of the accident slurry tank 4 is 80% -100% of the volume of the first unit desulfurization absorption tower 1; so that the emergency slurry tank 4 has sufficient capacity to hold the absorber slurry against overflow.
Specifically, the water inlet of the accident slurry return pump 7 is communicated with the accident slurry tank 4 through a second pipeline 9; the water outlet of the accident slurry return pump 7 is respectively communicated with the liquid inlets of the first unit desulfurization absorption tower 1 and the second unit desulfurization absorption tower 2 through a first pipeline 8; the emergency slurry return pump 7 pumps the liquid in the emergency slurry tank 4 through the second pipeline 9 and delivers the liquid to the recovery water tank 3 through the ninth pipeline 22.
Specifically, a first electric isolation door 15 is arranged on one side of the first liquid distribution pipe 13, and a second electric isolation door 16 is arranged on one side of the second liquid distribution pipe 14; the first electrically powered isolation door 15 and the second electrically powered isolation door 16 facilitate remote control of the switch state.
Specifically, side-feeding stirrers 21 are arranged inside the first unit desulfurization absorption tower 1 and the second unit desulfurization absorption tower 2; the side-entry agitator 21 is used to agitate the liquid.
Specifically, the number of the recovery water pumps 10 is three; the plurality of recovery water pumps 10 can increase the liquid discharge speed.
Specifically, two sides of the fifth pipeline 17 and the twelfth pipeline 29 are respectively provided with an electric valve 26; the sixth pipeline 18 is communicated with the recovery water tank 3 through a seventh pipeline 19; one side of the first pipeline 8 is communicated with the recovery water tank 3 through a ninth pipeline 22; the ninth pipeline 22 is used for discharging liquid in the accident slurry tank 4 into the recovery water tank for 3 years, the seventh pipeline 19 is used for discharging the liquid into the recovery water tank 3, and the electric valves 26 are convenient for opening and closing the two ends of the fifth pipeline 17 and the twelfth pipeline 29 respectively.
The working principle is as follows: and the first unit desulfurization system is stopped, and the second unit desulfurization system is operated. Firstly, the liquid level of a first unit desulfurization absorption tower 1 is adjusted, when the unit is stopped, the liquid level of the first unit desulfurization absorption tower 1 is reduced, the liquid level of the first unit desulfurization absorption tower 1 is controlled to be about 12m, a normal liquid level is designed to be 17m, and the density of the slurry of the first unit desulfurization absorption tower 1 is controlled to be 1150kg/m3(ii) a Then, the slurry of the second unit desulfurization absorption tower 2 is adjusted, and the density of the second unit desulfurization absorption tower 2 is adjusted to 1150kg/m3And the liquid level of the second unit desulfurization absorption tower 2 is adjusted to be lower than about 12m, and a design normal liquid level is 17 m; various pumps, the first vacuum belt dehydration system 5 and the second vacuum belt dehydration system 6 are comprehensively checked, and the safe and stable operation of each device during the dehydration period is ensured; checking whether the states of pipelines and valves from the recovery water pump 10 to the accident slurry tank 4 are normal; after the first unit desulfurization absorption tower 1 stops running, all water sources such as cooling water, flushing water, humidifying water and the like flowing to the first unit desulfurization absorption tower 1 are closed, and a blocking plate is additionally arranged on a demister pipeline of the first unit desulfurization absorption tower 1 when necessary; then, performing dehydration operation, namely dehydrating the slurry of the first unit desulfurization absorption tower 1 by using a first vacuum belt dehydration system 5 or a second vacuum belt dehydration system 6, discharging the generated filtrate to a recovery water tank 3 for storage through a sixth pipeline 18 and a seventh pipeline 19, and dehydrating the liquid level of the first unit desulfurization absorption tower 1 to the lowest liquid level at which a gypsum discharge pump of the desulfurization absorption tower stops; when the liquid level of the first unit desulfurization absorption tower 1 is reduced to the tripping liquid level of the absorption tower stirrer, stopping the side-feeding stirrer 21, standing the residual slurry in the absorption tower for a period of time, precipitating gypsum and other impurities into the tower bottom, discharging the supernatant, conveying the supernatant to the accident slurry box 4 for storage, and manually removing all impurities at the tower bottom out of the tower; when the unit is started again, filtrate reserved in the accident slurry tank 4 is returned to the first unit desulfurization absorption tower 1 again for use; most impurities of the filtrate are discharged compared with the slurry in the original desulfurization absorption tower; the quality of the slurry prepared by the method is improved; if more than two shut-down opportunities exist in one year, and each time is two days, the 'full-tower dehydration' process can be implemented, and the slurry is reset;
if the liquid level of the filtrate in the accident slurry box 4 is higher, the filtrate can be discharged to the second unit desulfurization absorption tower 2 through an accident slurry pump, and can also be discharged into a recovery water tank 3 through a ninth pipeline 22 for pulping by a desulfurization system;
in the dehydration process of the first unit desulfurization absorption tower 1, attention is paid to observing the change of gypsum on a vacuum belt, and when the gypsum is found to be thickened and the forming is deteriorated, the slurry concentration of the first unit desulfurization absorption tower 1 is reduced at the moment, so that the normal dehydration is not realized. At the moment, the slurry of the first unit desulfurization absorption tower 1 and the slurry of the second unit desulfurization absorption tower 2 are mixed and dehydrated by using the same vacuum belt dehydration system, and the concentration of the slurry of the second unit desulfurization absorption tower 2 reaches 1150kg/m3After the slurry of the two absorption towers is mixed, the concentration of the mixed slurry reaches the dehydration requirement, and the gypsum is still not sticky and can be normally molded; when the liquid level of the accident slurry tank 4 is higher than two thirds of the volume, starting the accident slurry return pump 7, and discharging the filtrate in the accident slurry tank 4 to the second unit desulfurization absorption tower 2 for water supplement; filtrate is discharged to the accident slurry tank 4 in the dehydration process, meanwhile, sealing water, filter cloth flushing water, sealing water of a water ring vacuum pump, machine sealing water of other equipment of the pulping building and flushing water of the first vacuum belt dehydration system 5 and the second vacuum belt dehydration system 6 are all discharged to the recovery water tank 3, and the water discharged to the recovery water tank 3 is also discharged to the accident slurry tank 4, so that the volume of the accident slurry tank 4 cannot meet the dehydration requirement; at the moment, the accident slurry return pump 7 must be started, and filtrate in the accident slurry tank 4 is discharged to the second desulfurization absorption tower so as to maintain the first unit desulfurization absorption tower 1 to continuously participate in dehydration operation; if the liquid level of the second unit of absorption tower is higher, controlling the temperature of the flue gas, increasing the temperature of the flue gas at the inlet of the second unit of desulfurization absorption tower 2, increasing the evaporation capacity of the flue gas of the second unit of desulfurization absorption tower 2, and quickly reducing the liquid level of the second unit of desulfurization absorption tower 2; then the side-feeding stirrer 21 is stopped, when the liquid level of the first unit desulfurization absorption tower 1 is reduced to the liquid level of the stirrer, the side-feeding stirrer 21 of the first unit desulfurization absorption tower 1 is stopped, and after the side-feeding stirrer 21 is stopped, the bottom exhaust door of the first unit desulfurization absorption tower 1 is opened to exhaust the slurry to the accident slurry tank 4Pulping;
stopping running all side-feeding stirrers 21 of the first unit desulfurization absorption tower 1, and stopping dehydration operation when the liquid level meets the minimum liquid level requirement of a gypsum discharge pump; at this moment, a small part is firstly opened 1 bottoms of the unit desulfurization absorption tower and is completely discharged slurry to 1 pit of the unit desulfurization absorption tower, and simultaneously, a pump outlet of the 1 pit of the unit desulfurization absorption tower is cut to 4 directions of the accident slurry tank, and slurry is discharged to 4 directions of the accident slurry tank by a 1 pit pump of the unit desulfurization absorption tower. Partially opening a bottom discharge door of the first unit desulfurization absorption tower 1, and keeping the small-flow continuous flow of the slurry at the bottom discharge door of the first unit desulfurization absorption tower 1 so as to prevent solid matters in the slurry from blocking the bottom discharge door of the first unit desulfurization absorption tower 1 after the solid matters in the slurry are completely settled; when the solid content in the discharged slurry is obviously reduced (more than two hours of slurry is needed for natural sedimentation and separation), the bottom drain opening is gradually opened to increase the discharge force of a pit pump; then, the impurities at the bottom of the first unit desulfurization absorption tower 1 are cleaned, the impurities at the bottom of the first unit desulfurization absorption tower 1 are thoroughly cleaned, and the work is finished.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides an equipment of all tower dehydration of wet flue gas desulfurization absorption tower thick liquid, whole thick liquid of replacement which characterized in that: the method comprises the following steps:
a first unit desulfurization absorption tower (1) and a second unit desulfurization absorption tower (2);
a filtrate assembly (23), the filtrate assembly (23) comprising a first vacuum belt dewatering system (5) and a second vacuum belt dewatering system (6); the slurry discharge port of the first unit desulfurization absorption tower (1) is communicated with an eighth pipeline (20), the eighth pipeline (20) is communicated with a fifth pipeline (17), and two ends of the fifth pipeline (17) are respectively communicated with liquid inlets of the first vacuum belt dehydration system (5) and the second vacuum belt dehydration system (6); an eleventh pipeline (28) is communicated with a slurry outlet of the second unit desulfurization absorption tower (2), the eleventh pipeline (28) is communicated with a twelfth pipeline (29), and two ends of the twelfth pipeline (29) are respectively communicated with liquid inlets of the first vacuum belt dehydration system (5) and the second vacuum belt dehydration system (6); filtrate discharge ports of the first vacuum belt dewatering system (5) and the second vacuum belt dewatering system (6) are communicated with a sixth pipeline (18);
the recycling assembly (24) comprises a recycling water tank (3), a recycling water pump (10), a third pipeline (11), a fourth pipeline (12), a tenth pipeline (27), a first liquid dividing pipe (13), a second liquid dividing pipe (14), a first electric isolating door (15) and a second electric isolating door (16); the recovery water tank (3) is provided with a recovery water pump (10), and a water inlet of the recovery water pump (10) is communicated with the inside of the recovery water tank (3) through a third pipeline (11); a water outlet of the recovery water pump (10) is communicated with a fourth pipeline (12), the fourth pipeline (12) is respectively communicated with a second unit desulfurization absorption tower (2) and a first unit desulfurization absorption tower (1) through a first liquid distribution pipe (13) and a second liquid distribution pipe (14), and the fourth pipeline (12) is communicated with the accident slurry tank (4) through a tenth pipeline (27);
an emergency slurry tank assembly (25), the emergency slurry tank assembly (25) comprising an emergency slurry tank (4), an emergency slurry return pump (7), a first pipe (8), a second pipe (9), and a ninth pipe (22); one side of the accident slurry tank (4) is communicated with a fourth pipeline (12) through a tenth pipeline (27); the accident slurry tank (4) is provided with an accident slurry return pump (7); the water outlet of the accident slurry return pump (7) is communicated with a first pipeline (8), and the first pipeline (8) is connected with the recovery water tank (3) through a ninth pipeline (22).
2. The apparatus for full tower dehydration and full slurry replacement of the wet desulphurization absorption tower slurry according to claim 1, characterized in that: the volume of the accident slurry tank (4) is 80-100% of the volume of the first unit desulfurization absorption tower (1).
3. The apparatus for full tower dehydration and full slurry replacement of the wet desulphurization absorption tower slurry according to claim 1, characterized in that: the water inlet of the accident slurry return pump (7) is communicated with the accident slurry tank (4) through a second pipeline (9); and the water outlet of the accident slurry return pump (7) is respectively communicated with the liquid inlets of the first unit desulfurization absorption tower (1) and the second unit desulfurization absorption tower (2) through a first pipeline (8).
4. The apparatus for full tower dehydration and full slurry replacement of the wet desulphurization absorption tower slurry according to claim 1, characterized in that: one side of first branch liquid pipe (13) is equipped with first electronic division door (15), one side of second branch liquid pipe (14) is equipped with electronic division door of second (16).
5. The apparatus for full tower dehydration and full slurry replacement of the wet desulphurization absorption tower slurry according to claim 1, characterized in that: and side-feeding stirrers (21) are arranged in the first unit desulfurization absorption tower (1) and the second unit desulfurization absorption tower (2).
6. The apparatus for full tower dehydration and full slurry replacement of the wet desulphurization absorption tower slurry according to claim 1, characterized in that: the number of the recovery water pumps (10) is three.
7. The apparatus for full tower dehydration and full slurry replacement of the wet desulphurization absorption tower slurry according to claim 1, characterized in that: electric valves (26) are arranged on two sides of the fifth pipeline (17) and the twelfth pipeline (29); the sixth pipeline (18) is communicated with the recovery water tank (3) through a seventh pipeline (19); one side of the first pipeline (8) is communicated with the recovery water tank (3) through a ninth pipeline (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921523679.7U CN210814627U (en) | 2019-09-13 | 2019-09-13 | Equipment for full-tower dehydration and replacement of all slurry in wet desulphurization absorption tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921523679.7U CN210814627U (en) | 2019-09-13 | 2019-09-13 | Equipment for full-tower dehydration and replacement of all slurry in wet desulphurization absorption tower |
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| CN210814627U true CN210814627U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921523679.7U Expired - Fee Related CN210814627U (en) | 2019-09-13 | 2019-09-13 | Equipment for full-tower dehydration and replacement of all slurry in wet desulphurization absorption tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112058028A (en) * | 2020-09-21 | 2020-12-11 | 山东国舜建设集团有限公司 | Double-tower double-circulation desulfurization system and method for eliminating accident slurry system |
-
2019
- 2019-09-13 CN CN201921523679.7U patent/CN210814627U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112058028A (en) * | 2020-09-21 | 2020-12-11 | 山东国舜建设集团有限公司 | Double-tower double-circulation desulfurization system and method for eliminating accident slurry system |
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