CN106823730B - Ammonia desulfurization system capable of preventing ammonia from escaping - Google Patents
Ammonia desulfurization system capable of preventing ammonia from escaping Download PDFInfo
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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
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/506—Sulfuric acid
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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 ammonia desulfurization system for preventing ammonia from escaping comprises a first absorption tower, a one-way valve, an oxidizer, a first centrifugal pump, a second centrifugal pump, a hydrogen peroxide storage tank, a third centrifugal pump and a second absorption tower. The application uses H obtained by the first absorption tower 2 SO 3 Oxidation of the solution to H with hydrogen peroxide 2 SO 4 The solution is mixed with the absorption liquid of the second absorption tower to maintain the acidity of the upper layer spraying liquid of the second absorption tower, and the ammonia gas escaping is absorbed and controlled by the acidic spraying liquid, so that the problem of ammonia escaping in the ammonia desulfurization process is fundamentally solved.
Description
Technical Field
The application relates to the field of flue gas treatment, in particular to an ammonia desulfurization system for preventing ammonia from escaping.
Background
Ammonia desulfurization technology uses NH in aqueous solution 3 And SO 2 Based on the reaction, SO in the flue gas is absorbed in the absorption section of the flue gas desulfurization tower 2 Absorbing to obtain the water solution of the desulfurization intermediate product ammonium sulfite or ammonium bisulfate, and blowing compressed air into a circulation tank of a desulfurization system to perform the oxidation reaction of the ammonium sulfite so as to directly oxidize the ammonium sulfite into an ammonium sulfate solution. In the concentrating section of the desulfurizing tower, the ammonium sulfate solution is concentrated by utilizing the heat of high-temperature flue gas to obtain ammonium sulfate slurry with certain solid content, and the slurry is subjected to procedures of cyclone concentration, centrifugal separation, drying, packaging and the like to obtain an ammonium sulfate product. The reaction equation is as follows:
SO 2 + NH 3 + H 2 O = NH 4 HSO 3
SO 2 + 2NH 3 + H 2 O = (NH 4 ) 2 SO 3
SO 2 + (NH 4 ) 2 SO 3 + H 2 O = 2NH 4 HSO 3
NH 3 + NH 4 HSO 3 =2 (NH 4 ) 2 SO 3
2 (NH 4 ) 2 SO 3 + O 2 = 2 (NH 4 ) 2 SO 4
the ammonia desulfurization is a high-efficiency low-energy-consumption wet desulfurization mode, the desulfurization process is gas-liquid phase reaction, the reaction rate is high, the utilization rate of the absorbent is high, and the desulfurization efficiency can be kept at 95-99%. The solubility of ammonia in water is over 20%. The ammonia process has rich raw materials. The ammonia process uses ammonia as raw material, and its forms may be liquid ammonia, aqueous ammonia and ammonium carbonate. The ammonia process has the greatest characteristic of SO 2 Can be recycled and can be used for recycling pollutant SO 2 Recovering (NH) as a high value 4 ) 2 SO 4 The fertilizer is an excellent nitrogenous fertilizer and is used in ChinaHas good market prospect.
At present, the domestic ammonia desulfurization technology generally has the problems of large consumption of desulfurizing agent, serious ammonia escape, difficult elimination of aerosol, slow oxidation of ammonium sulfite, difficult crystallization of ammonium sulfate and the like, and the problems restrict the further popularization and application of the ammonia desulfurization technology, wherein the ammonia escape phenomenon refers to the out-of-standard emission of free ammonia at the outlet of a desulfurization spray tower. The method for solving the escape of ammonia desulfurization ammonia mainly reduces ammonia carried by the desulfurization tail gas by means of measures such as improving the oxidation rate of ammonium sulfite, changing the ammonia adding point, controlling the pH value of desulfurization liquid and the like, and can only intercept the ammonia carried by the desulfurization tail gas as much as possible, so that the problem can not be solved fundamentally.
Disclosure of Invention
The technical problem to be solved by the application is to provide an ammonia desulfurization system for preventing ammonia from escaping, which absorbs H in the desulfurization process of water 2 SO 3 Catalytic oxidation of solutions to dilute H with hydrogen peroxide 2 SO 4 The solution is sprayed before the outlet of the desulfurization spray tower, so that escaped ammonia is absorbed, the problem of ammonia escape is fundamentally solved, and the barrier is cleared for the application and popularization of ammonia desulfurization.
The technical scheme adopted for solving the technical problems is an ammonia desulfurization system for preventing ammonia from escaping, which is characterized in that: the system is composed of: the device comprises a first absorption tower 1, a one-way valve 2, an oxidizer 3, a first centrifugal pump 4, a second centrifugal pump 5, a hydrogen peroxide storage tank 6, a third centrifugal pump 7 and a second absorption tower 8; the first absorption tower 1 and the second absorption tower 8 are towers with the same structure, the top of the tower is provided with an air outlet a, the bottom of the tower is provided with a slag discharging port f, and a demister b, an upper layer spray head c and a lower layer spray head d are sequentially arranged in the tower from top to bottom; an air inlet e is formed in the side face of the tower, and the position of the air inlet e is lower than that of the lower-layer spray head d; the oxidizer 3 is a pipeline filled with a catalyst, and the catalyst is made of manganese dioxide; the air outlet a of the first absorption tower 1 is communicated with the air inlet e of the second absorption tower 8 through a first pipeline, and the bottom of the first absorption tower 1 is also provided with a water inlet; the inlet of the first centrifugal pump 4 is communicated with the bottom of the first absorption tower 1 through a second pipeline, the outlet of the centrifugal pump 4 is communicated with a first port of a first tee joint through a third pipeline, a second port of the first tee joint is communicated with a lower layer spray head d of the first absorption tower 1 through a fourth pipeline, a third port of the first tee joint is communicated with a first port of a second tee joint through a fifth pipeline, and a second port of the second tee joint is communicated with an upper layer spray head c of the first absorption tower 1 through a sixth pipeline; the third port of the second tee is communicated with the first port of the third tee through a seventh pipeline, a one-way valve 2 is arranged on the seventh pipeline, and the passage direction of the one-way valve 2 is from the second tee to the third tee; the second port of the third tee joint is communicated with the outlet of the second centrifugal pump 5 through an eighth pipeline, and the inlet of the second centrifugal pump 5 is communicated with the bottom of the hydrogen peroxide storage tank 6 through a ninth pipeline; the third port of the third tee is communicated with one end of the oxidizer 3 through a tenth pipeline, and the other end of the oxidizer 3 is communicated with the first port of the fourth tee through an eleventh pipeline; the second port of the fourth tee is communicated with the upper layer spray head c of the second absorption tower 8 through a twelfth pipeline, the third port of the fourth tee is communicated with the first port of the first four-way through a thirteenth pipeline, the second port of the first four-way is communicated with the lower layer spray head d of the second absorption tower 8 through a fourteenth pipeline, the third port of the first four-way is communicated with the outlet of the third centrifugal pump 7 through a fifteenth pipeline, and the fourth port of the first four-way is an ammonium sulfate solution outlet; the inlet of the third centrifugal pump 7 is communicated with the bottom of the second absorption tower 8 through a sixteenth pipeline; the bottom of the second absorption tower 8 is also provided with a liquid ammonia inlet and an oxidation air inlet.
The basic working process of the ammonia desulfurization system for preventing ammonia from escaping is as follows: containing SO 2 The flue gas enters the first absorption tower 1 from the air inlet e and flows upwards, and H at the bottom of the tower 2 SO 3 The aqueous solution is conveyed by a first centrifugal pump 4, a part of the aqueous solution is conveyed to an upper layer spray head c and a lower layer spray head d of the first absorption tower 1, and sprayed in the tower to be absorbed by the upward flowing flue gas, and part of SO in the flue gas 2 The gas and most of the flue gas particles are absorbed, and H mixed with the particles is obtained at the bottom of the first absorption tower 1 2 SO 3 The water solution, the particulate matter is discharged from the slag discharging port f under the action of gravity, and the water is replenished from the water inlet; the smoke absorbed in the first absorption tower 1 passes through a demister b to remove fog drops, is discharged from an air outlet a of the first absorption tower 1, enters a second absorption tower 8 through a first pipeline, and flows from bottom to top in the second absorption tower 8; another portion H fed by the first centrifugal pump 4 2 SO 3 The aqueous solution is conveyed to the third tee joint through a seventh pipeline; the hydrogen peroxide water solution in the hydrogen peroxide storage tank 6 is conveyed to the third tee joint and the H by the second centrifugal pump 5 2 SO 3 Mixing the aqueous solution to obtain a mixed solution, allowing the mixed solution to enter an oxidizer 3 for oxidation reaction, wherein H is contained in the mixed solution 2 SO 3 The solution is oxidized to H 2 SO 4 The solution enters a fourth tee joint; the absorption liquid at the bottom of the second absorption column 8 (main component is (NH 4 ) 2 SO 4 、(NH 4 ) 2 SO 3 、NH 4 HSO 3 The solution of (2) is conveyed by a third centrifugal pump 7, a first part of the conveyed absorption liquid enters a lower layer spray head d of a second absorption tower 8 and is sprayed in the tower to fall, a second part of the conveyed absorption liquid enters a fourth tee joint and is connected with H through a fourth port of a first four-way ammonium sulfate removal crystallization system 2 SO 4 The solution is mixed to obtain acidic spray liquid, and the acidic spray liquid enters a lower layer spray head c of a second absorption tower 8 to spray in the tower; the absorption liquid sprayed by the lower layer nozzle d in the second absorption tower 8 contacts with the flue gas to absorb most of SO 2 Part of ammonia escapes, the acid spray liquid sprayed by the upper spray head c in the second absorption tower 8 absorbs the escaped ammonia, so that the escape of the ammonia is controlled, and purified flue gas is discharged from the air outlet a of the second absorption tower 8; the oxidation air enters the bottom of the second absorption tower 8 from the oxidation air inlet at the bottom of the tower, and (NH) 4 ) 2 SO 3 Oxidation to (NH) 4 ) 2 SO 4 The method comprises the steps of carrying out a first treatment on the surface of the Liquid ammonia is added from a liquid ammonia inlet at the bottom of the second absorption tower 8 to maintain the alkalinity of the absorption liquid at the bottom of the tower.
The beneficial effects of the application are as follows: h obtained by the first absorption tower 2 SO 3 Peroxide for solutionHydrogen oxidation to H 2 SO 4 The solution is mixed with the absorption liquid of the second absorption tower to maintain the acidity of the upper layer spraying liquid of the second absorption tower, and the ammonia gas escaping is absorbed and controlled by the acidic spraying liquid, so that the problem of ammonia escaping in the ammonia desulfurization process is fundamentally solved.
Drawings
FIG. 1 is a schematic flow diagram of an ammonia desulfurization system for preventing ammonia slip according to the present application.
Wherein: 1 is a first absorption tower, 2 is a one-way valve, 3 is an oxidizer, 4 is a first centrifugal pump, 5 is a second centrifugal pump, 6 is a hydrogen peroxide storage tank, 7 is a third centrifugal pump, 8 is a second absorption tower, a is an air outlet, b is a demister, c is an upper layer spray head, d is a lower layer spray head, e is an air inlet, and f is a slag discharge port.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in further detail by way of example with reference to fig. 1.
Example 1
An ammonia desulfurization system for preventing ammonia from escaping comprises a first absorption tower 1, a one-way valve 2, an oxidizer 3, a first centrifugal pump 4, a second centrifugal pump 5, a hydrogen peroxide storage tank 6, a third centrifugal pump 7 and a second absorption tower 8; the first absorption tower 1 and the second absorption tower 8 are towers with the same structure, the top of the tower is provided with an air outlet a, the bottom of the tower is provided with a slag discharging port f, and a demister b, an upper layer spray head c and a lower layer spray head d are sequentially arranged in the tower from top to bottom; an air inlet e is formed in the side face of the tower, and the position of the air inlet e is lower than that of the lower-layer spray head d; the oxidizer 3 is a pipeline filled with a catalyst, and the catalyst is made of manganese dioxide; the air outlet a of the first absorption tower 1 is communicated with the air inlet e of the second absorption tower 8 through a first pipeline, and the bottom of the first absorption tower 1 is also provided with a water inlet; the inlet of the first centrifugal pump 4 is communicated with the bottom of the first absorption tower 1 through a second pipeline, the outlet of the centrifugal pump 4 is communicated with a first port of a first tee joint through a third pipeline, a second port of the first tee joint is communicated with a lower layer spray head of the first absorption tower 1 through a fourth pipeline, a third port of the first tee joint is communicated with a first port of a second tee joint through a fifth pipeline, and a second port of the second tee joint is communicated with an upper layer spray head c of the first absorption tower 1 through a sixth pipeline; the third port of the second tee is communicated with the first port of the third tee through a seventh pipeline, a one-way valve 2 is arranged on the seventh pipeline, and the passage direction of the one-way valve 2 is from the second tee to the third tee; the second port of the third tee joint is communicated with the outlet of the second centrifugal pump 5 through an eighth pipeline, and the inlet of the second centrifugal pump 5 is communicated with the bottom of the hydrogen peroxide storage tank 6 through a ninth pipeline; the third port of the third tee is communicated with one end of the oxidizer 3 through a tenth pipeline, and the other end of the oxidizer 3 is communicated with the first port of the fourth tee through an eleventh pipeline; the second port of the fourth tee is communicated with the upper layer spray head c of the second absorption tower 8 through a twelfth pipeline, the third port of the fourth tee is communicated with the first port of the first four-way through a thirteenth pipeline, the second port of the first four-way is communicated with the lower layer spray head d of the second absorption tower 8 through a fourteenth pipeline, the third port of the first four-way is communicated with the outlet of the third centrifugal pump 7 through a fifteenth pipeline, and the fourth port of the first four-way is an ammonium sulfate solution outlet; the inlet of the third centrifugal pump 7 is communicated with the bottom of the second absorption tower 8 through a sixteenth pipeline; the bottom of the second absorption tower 8 is also provided with a liquid ammonia inlet and an oxidation air inlet.
The basic working process of the ammonia desulfurization system for preventing ammonia from escaping is as follows: containing SO 2 The flue gas enters the first absorption tower 1 from the air inlet e and flows upwards, and H at the bottom of the tower 2 SO 3 The aqueous solution is conveyed by a first centrifugal pump 4, a part of the aqueous solution is conveyed to an upper layer spray head c and a lower layer spray head d of the first absorption tower 1, and sprayed in the tower to be absorbed by the upward flowing flue gas, and part of SO in the flue gas 2 The gas and most of the flue gas particles are absorbed, and H mixed with the particles is obtained at the bottom of the first absorption tower 1 2 SO 3 The water solution, the particulate matter is discharged from the slag discharging port f under the action of gravity, and the water is replenished from the water inlet; the smoke absorbed in the first absorption tower 1 passes through a demister b to remove fog drops, and then is discharged fromThe air outlet a of the first absorption tower 1 is discharged, enters the second absorption tower 8 through a first pipeline, and flows from bottom to top in the second absorption tower 8; another portion H fed by the first centrifugal pump 4 2 SO 3 The aqueous solution is conveyed to the third tee joint through a seventh pipeline; the hydrogen peroxide water solution in the hydrogen peroxide storage tank 6 is conveyed to the third tee joint and the H by the second centrifugal pump 5 2 SO 3 Mixing the aqueous solution to obtain a mixed solution, allowing the mixed solution to enter an oxidizer 3 for oxidation reaction, wherein H is contained in the mixed solution 2 SO 3 The solution is oxidized to H 2 SO 4 The solution enters a fourth tee joint; the absorption liquid at the bottom of the second absorption column 8 (main component is (NH 4 ) 2 SO 4 、(NH 4 ) 2 SO 3 、NH 4 HSO 3 The solution of (2) is conveyed by a third centrifugal pump 7, a first part of the conveyed absorption liquid enters a lower layer spray head d of a second absorption tower 8 and is sprayed in the tower to fall, a second part of the conveyed absorption liquid enters a fourth tee joint and is connected with H through a fourth port of a first four-way ammonium sulfate removal crystallization system 2 SO 4 The solution is mixed to obtain acidic spray liquid, and the acidic spray liquid enters a lower layer spray head c of a second absorption tower 8 to spray in the tower; the absorption liquid sprayed by the lower layer nozzle d in the second absorption tower 8 contacts with the flue gas to absorb most of SO 2 Part of ammonia escapes, the acid spray liquid sprayed by the upper spray head c in the second absorption tower 8 absorbs the escaped ammonia, so that the escape of the ammonia is controlled, and purified flue gas is discharged from the air outlet a of the second absorption tower 8; the oxidation air enters the bottom of the second absorption tower 8 from the oxidation air inlet at the bottom of the tower, and (NH) 4 ) 2 SO 3 Oxidation to (NH) 4 ) 2 SO 4 The method comprises the steps of carrying out a first treatment on the surface of the Liquid ammonia is added from a liquid ammonia inlet at the bottom of the second absorption tower 8 to maintain the alkalinity of the absorption liquid at the bottom of the tower.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (1)
1. An ammonia desulfurization system for preventing ammonia from escaping, which is characterized in that: the system is composed of: the device comprises a first absorption tower, a one-way valve, an oxidizer, a first centrifugal pump, a second centrifugal pump, a hydrogen peroxide storage tank, a third centrifugal pump and a second absorption tower;
the first absorption tower and the second absorption tower are towers with the same structure, the top of the tower is provided with an air outlet, the bottom of the tower is provided with a slag discharging port, and a demister, an upper layer nozzle and a lower layer nozzle are sequentially arranged in the tower from top to bottom; an air inlet is formed in the side face of the tower, and the position of the air inlet is lower than that of the lower-layer spray head; the oxidizer is a pipeline filled with a catalyst, and the catalyst is made of manganese dioxide;
the air outlet of the first absorption tower is communicated with the air inlet of the second absorption tower through a first pipeline, and the bottom of the first absorption tower is also provided with a water inlet; the inlet of the first centrifugal pump is communicated with the bottom of the first absorption tower through a second pipeline, the outlet of the centrifugal pump is communicated with a first port of the first tee joint through a third pipeline, a second port of the first tee joint is communicated with a lower layer spray head of the first absorption tower through a fourth pipeline, a third port of the first tee joint is communicated with a first port of the second tee joint through a fifth pipeline, and a second port of the second tee joint is communicated with an upper layer spray head of the first absorption tower through a sixth pipeline; the third port of the second tee is communicated with the first port of the third tee through a seventh pipeline, a one-way valve is arranged on the seventh pipeline, and the passage direction of the one-way valve is from the second tee to the third tee; the second port of the third tee joint is communicated with the outlet of the second centrifugal pump through an eighth pipeline, and the inlet of the second centrifugal pump is communicated with the bottom of the hydrogen peroxide storage tank through a ninth pipeline; the third port of the third tee joint is communicated with one end of the oxidizer through a tenth pipeline, and the other end of the oxidizer is communicated with the first port of the fourth tee joint through an eleventh pipeline; the second port of the fourth tee is communicated with the upper layer spray head of the second absorption tower through a twelfth pipeline, the third port of the fourth tee is communicated with the first port of the first four-way through a thirteenth pipeline, the second port of the first four-way is communicated with the lower layer spray head of the second absorption tower through a fourteenth pipeline, the third port of the first four-way is communicated with the outlet of the third centrifugal pump through a fifteenth pipeline, and the fourth port of the first four-way is an ammonium sulfate solution outlet; an inlet of the third centrifugal pump is communicated with the bottom of the second absorption tower through a sixteenth pipeline; the bottom of the second absorption tower is also provided with a liquid ammonia inlet and an oxidation air inlet.
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| DE3733319A1 (en) * | 1987-10-02 | 1989-04-13 | Krupp Koppers Gmbh | Process for removing sulphur dioxide from flue gases |
| CN101842147A (en) * | 2007-08-23 | 2010-09-22 | 卡尔斯鲁厄技术研究院 | Method for the cleaning of off-gas |
| CN103463978A (en) * | 2013-09-30 | 2013-12-25 | 南京理工大学 | Device and method for smoke simultaneous desulfurization and denitrification based on hydrogen peroxide catalytic oxidation |
| CN103721553A (en) * | 2014-01-07 | 2014-04-16 | 江苏新世纪江南环保股份有限公司 | Method for efficiently removing acid gas sulfide by ammonia process desulfurization technique |
| CN104785091A (en) * | 2015-04-24 | 2015-07-22 | 南京澄天环境科学研究院有限公司 | Advanced emission reduction method and device for sulfur-containing tail gas of fuming furnace |
| CN206587586U (en) * | 2017-03-21 | 2017-10-27 | 宁波工程学院 | It is a kind of to prevent the ammonia method desulfurizing system of the escaping of ammonia |
-
2017
- 2017-03-21 CN CN201710170704.7A patent/CN106823730B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3733319A1 (en) * | 1987-10-02 | 1989-04-13 | Krupp Koppers Gmbh | Process for removing sulphur dioxide from flue gases |
| CN101842147A (en) * | 2007-08-23 | 2010-09-22 | 卡尔斯鲁厄技术研究院 | Method for the cleaning of off-gas |
| CN103463978A (en) * | 2013-09-30 | 2013-12-25 | 南京理工大学 | Device and method for smoke simultaneous desulfurization and denitrification based on hydrogen peroxide catalytic oxidation |
| CN103721553A (en) * | 2014-01-07 | 2014-04-16 | 江苏新世纪江南环保股份有限公司 | Method for efficiently removing acid gas sulfide by ammonia process desulfurization technique |
| CN104785091A (en) * | 2015-04-24 | 2015-07-22 | 南京澄天环境科学研究院有限公司 | Advanced emission reduction method and device for sulfur-containing tail gas of fuming furnace |
| CN206587586U (en) * | 2017-03-21 | 2017-10-27 | 宁波工程学院 | It is a kind of to prevent the ammonia method desulfurizing system of the escaping of ammonia |
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