CN108744940B - Desulfurization by-product oxidation device - Google Patents
Desulfurization by-product oxidation device Download PDFInfo
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- CN108744940B CN108744940B CN201810371193.XA CN201810371193A CN108744940B CN 108744940 B CN108744940 B CN 108744940B CN 201810371193 A CN201810371193 A CN 201810371193A CN 108744940 B CN108744940 B CN 108744940B
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- desulfurization
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
Abstract
The invention provides a desulfurization byproduct oxidation device, and belongs to the technical field of environmental engineering. The device comprises a desulfurization by-product inlet, a fluidization air inlet, an oxidation zone, a ceramic heating plate, a guide plate, a buffer zone, an ash bucket, an ash discharging pipe, a slurry pond and a gypsum outlet, wherein the desulfurization by-product inlet and the fluidization air inlet are positioned at the left lower side outside the device; the oxidation area is positioned at the left side in the device and occupies three fourths of the internal space of the device; the ceramic heating plate is positioned on the inner side wall plate of the oxidation zone; the buffer area is positioned on the right side in the device and occupies one quarter of the internal space of the device; the lower ash pipe is connected with the ash hopper of the buffer zone, and is designed in two sections, the section directly connected with the ash hopper is a vertical pipe, and the section contacted with the slurry is an inclined pipe. The device has the advantages of investment saving, small occupied area, low energy consumption, simple operation, high oxidation efficiency and the like.
Description
Technical Field
The invention relates to the technical field of environmental engineering, in particular to a desulfurization byproduct oxidation device.
Background
In the case that wet desulfurization is confirmed as one of the most basic haze, the semi-dry desulfurization and dust removal integrated process becomes the first process for newly-built and reformed desulfurization in recent years. However, due to the large dosage of the semi-dry desulfurization agent, the comprehensive utilization of desulfurization byproducts becomes a research hot spot in recent years, and the solution of the comprehensive utilization of desulfurization byproducts becomes the primary task of each semi-dry process engineering company. So long as the CaSO in the desulfurization byproducts is solved 3 High oxidation to CaSO 4 The problem of the desulfurization by-product is solved. The existing desulfurization byproduct oxidation devices, such as China patent: CN201410380659.4 "dry method, semi-dry method desulfurized ash two-stage rotary oxygen-enriched external heating oxidation process and device"; ZL201621001279.6 "a novel desulfurization ash oxidation device"; ZL201620928355.1 "a desulfurization ash oxidation apparatus"; ZL201620209119.4 is a sealed oxidation device of semi-dry desulfurization ash; ZL201621001280.9 "oxidation device of desulfurized fly ash"; ZL201020627340.4 "desulfurization ash oxidation apparatus" and the like all oxidize desulfurization byproducts. The prior art all needs external heating to provide oxidation temperature, but the heat source is not in direct contact with desulfurization byproducts, so the energy consumption is high, and the problems of incomplete oxidation, low oxidation efficiency and the like are remarkable because the desulfurization byproducts are piled up in the oxidation process; the prior art has also promoted oxidation by spraying an oxidant in the desulfurization by-product, since the oxidant is generally expensive and if not externally heated, caSO in the dry state 3 Oxidation to CaSO 4 Is very limited.
Disclosure of Invention
The invention provides a desulfurization byproduct oxidation device, which aims to solve a series of problems of high energy consumption, low oxidation efficiency, high investment and operation cost and the like in the existing desulfurization byproduct oxidation process.
The device comprises a desulfurization by-product inlet, a fluidization air inlet, an oxidation zone, a ceramic heating plate, a guide plate, a buffer zone, an ash bucket, an ash discharging pipe, a slurry pond and a gypsum outlet, wherein the desulfurization by-product inlet and the fluidization air inlet are positioned at the left lower side outside the device, the direction of the desulfurization by-product inlet is from top to bottom, and the direction of the fluidization air inlet is from left to right; the fluidization wind inlet is communicated with an oxidation zone which is arranged in the left side area of the inside of the device; the ceramic heating plate is vertically arranged on the inner wall of the oxidation zone, so that desulfurization byproducts in the oxidation zone are heated more directly, and heat energy loss is avoided; the buffer area is arranged in the right side area inside the device; a guide plate is arranged between the oxidation area and the buffer area; an ash bucket is arranged below the buffer zone, the lower part of the ash bucket is connected with an ash discharging pipe, the ash discharging pipe stretches into the position below the liquid level of the slurry pool below the ash bucket, and a gypsum outlet is arranged at the bottom of the slurry pool.
The fluidization air inlet and the desulfurization by-product inlet are vertically and alternately arranged, so that the desulfurization by-product is primarily fluidized before entering the device.
The oxidation area occupies 3/4 space in the device, and the computer simulation and the repeated test show that the flow field of the desulfurization byproducts is more uniform when the area of the oxidation area occupies such a large space, namely the CaSO 3 Oxidation to CaSO 4 The efficiency is higher and more thorough; the bottom of the oxidation zone is in a slope shape, the included angle between the bottom surface of the oxidation zone and the horizontal plane is 45 degrees, the joint of the oxidation zone and the fluidization wind inlet is in an arc shape, and the arc is 120 degrees; the oxidation zone is 1-5m wide, 1-5m long and 1-10m high.
The buffer area occupies 1/4 space in the device, and computer simulation and repeated experiments show that when the area of the oxidation area occupies such a large space, the sedimentation speed of desulfurization byproducts after oxidation is high, so that the period of gypsum output is shortened; the buffer area is 0.3-1.6m wide, 0.3-1.6m long and 1-10m high.
The ceramic heating plates are uniformly distributed on the inner wall of the oxidation zone, the number of the ceramic heating plates is 120-900, the ceramic heating plates are 8-10mm long, 8-10mm wide, 1.0-1.2mm thick, the resistance is 3-3.5 ohms, and the voltage is 8v.
The ash discharging pipe is divided into two sections, the connecting section of the ash discharging pipe and the ash hopper accounts for 1/5 of the length of the ash discharging pipe, and the section is vertical to the horizontal plane; the part of the lower ash pipe extending below the liquid level of the slurry pool occupies 4/5 of the length of the lower ash pipe, and the section forms an angle of 60 degrees with the horizontal plane.
The cross section of the slurry pond is square, the bottom of the slurry pond is in a slope shape, and the included angle between the bottom of the slurry pond and the horizontal direction is 15 degrees; the four corners of the bottom surface of the slurry pond are all arc-shaped, and the arc angle is 120 degrees.
The bottom of the guide plate is connected with the junction of the oxidation area and the buffer area, and the distance between the upper part of the guide plate and the top surface of the device is 0.25-2.5m.
The desulfurization by-product treatment capacity of the device is 0.5-20 t/h, and the oxidation temperature in the device is 500-550 ℃.
The device oxidizes desulfurization byproducts at high temperature under the fluidization state, the oxidization temperature can reach 500-550 ℃, and the heat loss is very small because the ceramic heating plate is directly attached to the inner wall of the oxidization zone. Since the desulfurization byproducts are oxidized in the fluidized state in the present apparatus, caSO 3 The contact with oxygen is very sufficient, so that no additional oxygen source is needed, and the oxidation efficiency can be ensured to be more than 97% only under the air. The device has low energy consumption, small occupied area and low investment and operation cost, and provides good reference for comprehensive utilization of semi-dry desulfurization byproducts.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the design of high-temperature fluidization, oxidation and desulfurization byproducts is adopted, namely the desulfurization byproducts are contacted with oxygen in the air in a high-temperature environment in a fluidized state, so that the CaSO is obtained 3 Oxidation to CaSO 4 . The bottom of the oxidation zone is in a slope shape, the included angle between the bottom surface of the oxidation zone and the horizontal plane is 45 degrees, the joint of the oxidation zone and the fluidization wind inlet is in an arc shape, and the arc is at an angle of 120 degrees; laboratory tests and computer simulations have shown that the bottom of the oxidation zone is designed according to the inventionThe deposition of desulfurization byproducts can be reduced by 30%, and the problem that the desulfurization byproducts are easy to deposit at the inlet is basically solved. The connecting section of the lower ash pipe and the ash bucket accounts for 1/5 of the length of the lower ash pipe, and the connecting section is vertical to the horizontal plane; the part extending below the liquid level of the slurry pool occupies 4/5 of the length of the ash discharging pipe, and the section forms an angle of 60 degrees with the horizontal plane. Laboratory tests and computer simulation show that the deposition of desulfurization byproducts at the bottom of the oxidation zone can be reduced by 30 percent according to the design of the invention, and the problem that the desulfurization byproducts are easy to deposit at the inlet is basically solved; according to the design of the invention, when desulfurization byproducts enter the slurry through the ash discharging pipe, the impact on the bottom of the slurry tank when a large amount of desulfurization byproducts fall into the slurry is avoided, so that the desulfurization byproducts can be rapidly dispersed after entering the slurry, and the accumulation of the desulfurization byproducts on the bottom surface of the slurry tank is avoided.
The device has the advantages of small occupied area, no heat energy loss, low energy consumption, large contact area and high oxidation efficiency, and solves the problems of low oxidation efficiency, high investment and operation cost and the like of the semi-dry desulfurization byproducts.
Drawings
FIG. 1 is a schematic diagram of a desulfurization byproduct oxidizing apparatus of the present invention.
Wherein: 1-desulfurization by-product inlet; 2-a fluidization wind inlet; a 3-oxidation zone; 4-ceramic heating plates; 5-a deflector; 6-buffer; 7-ash bucket; 8-ash discharging pipe; 9-a slurry pond; 10-gypsum outlet.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
Aiming at the problems of high energy consumption, high investment and operation cost, incomplete oxidization and the like of the existing desulfurization byproduct oxidizing device, the invention provides the desulfurization byproduct oxidizing device which is economical, small in occupied area, prominent in oxidizing effect and low in energy consumption.
In the device, as shown in fig. 1, a desulfurization by-product inlet 1 and a fluidization wind inlet 2 are positioned at the left lower side outside the device, the direction of the desulfurization by-product inlet 1 is from top to bottom, and the direction of the fluidization wind inlet 2 is from left to right; the fluidization air inlet 2 is communicated with the oxidation zone 3, and the oxidation zone 3 is arranged in the left side area inside the device; the ceramic heating plate 4 is vertically arranged on the inner wall of the oxidation zone 3; the buffer zone 6 is arranged in the right area inside the device; a deflector 5 is arranged between the oxidation zone 3 and the buffer zone 6; an ash bucket 7 is arranged below the buffer zone 6, the lower part of the ash bucket 7 is connected with an ash discharging pipe 8, the ash discharging pipe 8 stretches into the position below the liquid level of a slurry pool 9 below the ash bucket 7, and a gypsum outlet 10 is arranged at the bottom of the slurry pool 9.
In the actual arrangement, the fluidization air inlets 2 are arranged vertically and alternately with the desulfurization by-product inlets 1. The oxidation zone 3 occupies 3/4 space in the device, the bottom of the oxidation zone 3 is in a slope shape, the included angle between the bottom surface of the oxidation zone 3 and the horizontal plane is 45 degrees, the joint of the oxidation zone 3 and the fluidization wind inlet 2 is in an arc shape, and the arc is an angle of 120 degrees; the oxidation zone 3 has a width of 1-5m, a length of 1-5m and a height of 1-10m.
The buffer zone 6 occupies 1/4 space inside the device, the buffer zone 6 is 0.3-1.6m wide, 0.3-1.6m long and 1-10m high.
The ceramic heating plates 4 are uniformly distributed on the inner wall of the oxidation zone 3, the number of the ceramic heating plates 4 is 120-900, the length of the ceramic heating plates 4 is 8-10mm, the width of the ceramic heating plates 4 is 8-10mm, the thickness of the ceramic heating plates is 1.0-1.2mm, the resistance is 3-3.5 ohms, and the voltage is 8v.
The ash discharging pipe 8 is divided into two sections, the section of the ash discharging pipe 8 connected with the ash bucket 7 accounts for 1/5 of the length of the ash discharging pipe 8, and the section is vertical to the horizontal plane; the lower ash pipe 8 extends to 4/5 of the length of the lower ash pipe 8 below the liquid surface of the slurry pool 9, and the section forms an angle of 60 degrees with the horizontal plane.
The cross section of the slurry pond 9 is square, the bottom of the slurry pond 9 is in a slope shape, and the included angle between the bottom of the slurry pond 9 and the horizontal direction is 15 degrees; the four corners of the bottom surface of the slurry pond 9 are all arc-shaped, and the arc angle is 120 degrees.
In practical use, the air from the fluidization air inlet 2 not only provides the fluidization air velocity for the desulfurization byproducts in the oxidation zone 3, but also provides an oxygen source for the desulfurization byproducts, and the desulfurization byproducts in the design are in a suspension fluidization state, and the ambient temperature reaches 500-550 ℃, so that the CaSO 3 Conversion to CaSO 4 The conversion rate of (2) is very high and can reach more than 97%. The bottom of the oxidation zone 3 is in a slope shape, the included angle between the bottom surface of the oxidation zone 3 and the horizontal plane is 45 degrees, the joint of the oxidation zone 3 and the fluidization wind inlet 2 is in an arc shape, the arc is 120 degrees, and experiments prove thatThe special design of the bottom of the oxidation zone 3 can reduce the deposition of the desulfurization byproducts by 30 percent by laboratory tests and computer simulation, and basically solves the problem that the desulfurization byproducts are easy to deposit at the inlet. The connecting section of the ash discharging pipe 8 and the ash hopper 7 occupies 1/5 of the pipe length of the ash discharging pipe 8, and the connecting section is vertical to the horizontal plane; the part extending below the liquid level of the slurry tank 9 occupies 4/5 of the length of the lower ash pipe 8, and this section forms an angle of 60 degrees with the horizontal plane. Through laboratory tests and computer simulation, the special design of the ash discharging pipe 8 avoids the impact on the bottom of the slurry tank when a large amount of desulfurization byproducts fall into the slurry, so that the desulfurization byproducts can be rapidly dispersed after entering the slurry, and the accumulation of the desulfurization byproducts on the bottom surface of the slurry tank is avoided.
In a specific application, about 80 degrees of desulfurization byproducts intermittently discharged from a semi-dry desulfurization device vertically enter the device of the invention from a desulfurization byproduct inlet 1, the wind provided by a Roots blower horizontally enters the device of the invention from a fluidization wind inlet 2, the desulfurization byproducts are blown into an oxidation zone 3 of the device by fluidization wind, and the Roots blower not only provides fluidization wind of the desulfurization byproducts in the oxidation zone 3, but also is CaSO 3 Oxidation to CaSO 4 An oxygen source is provided. Ceramic heating plates 4 are uniformly arranged on the inner wall of the oxidation zone 3, the ceramic heating plates 4 ensure that the temperature of the oxidation zone reaches 500-550 ℃, and desulfurization byproducts fully contact oxygen in the oxidation zone, so that CaSO is carried out 3 Oxidation to CaSO 4 . The desulfurization byproducts continue to move and enter the buffer zone 6, naturally settle in the buffer zone 6, fall into the ash discharging pipe 8 through the ash hopper 7, and the two-section design of the ash discharging pipe 8 not only enables the desulfurization byproducts to be smoothly discharged, but also enables the desulfurization byproducts to be rapidly dispersed after entering the slurry pond 9, so that the bottom surface clogging phenomenon is reduced. Gypsum in the slurry pond 9 is periodically discharged from a gypsum outlet 10, dehydrated by a plate-and-frame filter press, and then the high-quality gypsum which is thoroughly oxidized is transported to a building material factory for secondary use. The waste liquid of gypsum filter pressing returns to the slurry pond 9, so that the whole cycle is completed.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The utility model provides a desulfurization accessory substance oxidation unit which characterized in that: the device comprises a desulfurization by-product inlet (1), a fluidization air inlet (2), an oxidation zone (3), a ceramic heating plate (4), a guide plate (5), a buffer zone (6), an ash bucket (7), an ash discharging pipe (8), a slurry pool (9) and a gypsum outlet (10), wherein the desulfurization by-product inlet (1) and the fluidization air inlet (2) are positioned at the left lower side outside the device, the direction of the desulfurization by-product inlet (1) is from top to bottom, and the direction of the fluidization air inlet (2) is from left to right; the fluidization air inlet (2) is communicated with the oxidation zone (3), and the oxidation zone (3) is arranged in the left side area inside the device; the ceramic heating plate (4) is vertically arranged on the inner wall of the oxidation zone (3); the buffer zone (6) is arranged in the right side area inside the device; a guide plate (5) is arranged between the oxidation zone (3) and the buffer zone (6); an ash bucket (7) is arranged below the buffer zone (6), the lower part of the ash bucket (7) is connected with an ash discharging pipe (8), the ash discharging pipe (8) stretches into the position below the liquid level of a slurry pool (9) below the ash bucket (7), and a gypsum outlet (10) is arranged at the bottom of the slurry pool (9).
2. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the fluidization wind inlet (2) and the desulfurization byproduct inlet (1) are vertically and alternately arranged.
3. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the oxidation zone (3) occupies 3/4 space in the device, the bottom of the oxidation zone (3) is in a slope shape, the included angle between the bottom surface of the oxidation zone (3) and the horizontal plane is 45 degrees, the joint of the oxidation zone (3) and the fluidization wind inlet (2) is in an arc shape, and the arc is an angle of 120 degrees; the oxidation zone (3) has a width of 1-5m, a length of 1-5m and a height of 1-10m.
4. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the buffer area (6) occupies 1/4 space inside the device, the width of the buffer area (6) is 0.3-1.6m, the length of the buffer area is 0.3-1.6m, and the height of the buffer area is 1-10m.
5. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the ceramic heating plates (4) are uniformly distributed on the inner wall of the oxidation zone (3), the number of the ceramic heating plates (4) is 120-900, the length of the ceramic heating plates (4) is 8-10mm, the width of the ceramic heating plates is 8-10mm, the thickness of the ceramic heating plates is 1.0-1.2mm, the resistance of the ceramic heating plates is 3-3.5 ohms, and the voltage of the ceramic heating plates is 8v.
6. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the ash discharging pipe (8) is divided into two sections, the section of the ash discharging pipe (8) connected with the ash bucket (7) occupies 1/5 of the pipe length of the ash discharging pipe (8), and the section is vertical to the horizontal plane; the lower ash pipe (8) stretches into the part below the liquid level of the slurry pool (9) and occupies 4/5 of the pipe length of the lower ash pipe (8), and the section forms an angle of 60 degrees with the horizontal plane.
7. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the cross section of the slurry pool (9) is square, the bottom of the slurry pool (9) is in a slope shape, and the included angle between the bottom of the slurry pool (9) and the horizontal direction is 15 degrees; the four corners of the bottom surface of the slurry pond (9) are all arc-shaped, and the arc angle is 120 degrees.
8. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the bottom of the guide plate (5) is connected with the junction of the oxidation zone (3) and the buffer zone (6), and the distance between the upper part of the guide plate (5) and the top surface of the device is 0.25-2.5m.
9. The desulfurization byproduct oxidizing apparatus of claim 1, wherein: the desulfurization by-product treatment capacity of the device is 0.5-20 t/h, and the oxidation temperature in the device is 500-550 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810371193.XA CN108744940B (en) | 2018-04-24 | 2018-04-24 | Desulfurization by-product oxidation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810371193.XA CN108744940B (en) | 2018-04-24 | 2018-04-24 | Desulfurization by-product oxidation device |
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| CN108744940A CN108744940A (en) | 2018-11-06 |
| CN108744940B true CN108744940B (en) | 2023-10-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4544542A (en) * | 1984-04-16 | 1985-10-01 | Dorr-Oliver Incorporated | Method for oxidation of flue gas desulfurization absorbent and the product produced thereby |
| EP0164192A1 (en) * | 1984-04-12 | 1985-12-11 | A/S Niro Atomizer | Method and reactor for treating by-products from flue gas desulfurization |
| CA2336436A1 (en) * | 2000-04-04 | 2001-10-04 | Eastroc Llc | Process for producing gypsum from a calcium sulfite gas desulfurization slurry |
| CN205687575U (en) * | 2016-06-08 | 2016-11-16 | 云南澄江天辰磷肥有限公司 | A kind of processing means of wet magnesium oxide desulphurization by-product |
| CN208320459U (en) * | 2018-04-24 | 2019-01-04 | 北京北科环境工程有限公司 | A kind of semi-dry process flue gas desulphurization by-product oxidative system |
-
2018
- 2018-04-24 CN CN201810371193.XA patent/CN108744940B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0164192A1 (en) * | 1984-04-12 | 1985-12-11 | A/S Niro Atomizer | Method and reactor for treating by-products from flue gas desulfurization |
| US4544542A (en) * | 1984-04-16 | 1985-10-01 | Dorr-Oliver Incorporated | Method for oxidation of flue gas desulfurization absorbent and the product produced thereby |
| CA2336436A1 (en) * | 2000-04-04 | 2001-10-04 | Eastroc Llc | Process for producing gypsum from a calcium sulfite gas desulfurization slurry |
| CN205687575U (en) * | 2016-06-08 | 2016-11-16 | 云南澄江天辰磷肥有限公司 | A kind of processing means of wet magnesium oxide desulphurization by-product |
| CN208320459U (en) * | 2018-04-24 | 2019-01-04 | 北京北科环境工程有限公司 | A kind of semi-dry process flue gas desulphurization by-product oxidative system |
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