CN222400714U - Flue gas dust removal desulfurization device for thermal power generation - Google Patents
Flue gas dust removal desulfurization device for thermal power generation Download PDFInfo
- Publication number
- CN222400714U CN222400714U CN202420945467.2U CN202420945467U CN222400714U CN 222400714 U CN222400714 U CN 222400714U CN 202420945467 U CN202420945467 U CN 202420945467U CN 222400714 U CN222400714 U CN 222400714U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- desulfurization
- groups
- tank body
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
本实用新型涉及烟气净化技术领域，特别是涉及一种火力发电用烟气除尘脱硫装置，包括第一罐体和通水阀，通水阀连通设置在第一罐体外侧壁上；还包括进气装置、过滤装置、脱硫组件、输送斗、换热管和隔板，输送斗安装在第一罐体内底部，输送斗底端与进气装置连通，进气装置用于将烟气输送至输送斗内部，多组换热管均连通设置在输送斗顶端，多组换热管顶端均与隔板外侧壁连接，过滤装置设置在隔板上，过滤装置用于将烟气过滤，脱硫组件与第一罐体内连通，脱硫组件用于将烟气脱硫处理，其提高对烟气的净化处理效果，提高烟气热量回收利用效果，提高能源利用率。
The utility model relates to the technical field of flue gas purification, in particular to a flue gas dust removal and desulfurization device for thermal power generation, comprising a first tank body and a water valve, the water valve being connected and arranged on the outer side wall of the first tank body; further comprising an air intake device, a filtering device, a desulfurization component, a conveying bucket, a heat exchange pipe and a partition, the conveying bucket being installed at the bottom of the first tank body, the bottom end of the conveying bucket being connected with the air intake device, the air intake device being used for conveying the flue gas to the inside of the conveying bucket, a plurality of groups of heat exchange pipes being connected and arranged at the top end of the conveying bucket, the top ends of the plurality of groups of heat exchange pipes being connected with the outer side wall of the partition, the filtering device being arranged on the partition, the filtering device being used for filtering the flue gas, the desulfurization component being connected with the first tank body, the desulfurization component being used for desulfurizing the flue gas, which improves the purification effect of the flue gas, improves the heat recovery and utilization effect of the flue gas, and improves the energy utilization rate.
Description
Technical Field
The utility model relates to the technical field of flue gas purification, in particular to a flue gas dust removal and desulfurization device for thermal power generation.
Background
Thermal power generation is used as a main energy supply mode, and serious environmental pollution is brought while economic development is promoted, wherein the emission of sulfur dioxide (SO 2) and particulate matters in flue gas becomes a main environmental challenge facing the thermal power generation industry, and in order to reduce the emission of harmful substances in the flue gas, improve the air quality and generate a flue gas dust removal and desulfurization device.
As in the patent with the prior art grant publication number of CN205084607U, the utility model discloses a flue gas dust removal and desulfurization device, which comprises a dust removal device and a desulfurization device which are connected in sequence, wherein the dust removal device comprises a flue gas channel bin and a flue gas storage bin which are divided by a partition plate, one end of the flue gas channel bin is connected with a flue gas inlet pipeline, the other end of the flue gas channel bin is provided with a filter screen, and a notch is arranged below the filter screen by the partition plate, so that the flue gas can conveniently fall from the flue gas channel bin to the flue gas storage bin.
But the device discovers in the use, and the device is inconvenient to retrieve the heat in the flue gas to smoke and dust and atomized aqueous ammonia intensive mixing effect is relatively poor, has reduced the desulfurization effect of smoke and dust.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the flue gas dust removal desulfurization device for the thermal power generation, which has the advantages of improving the purifying treatment effect on flue gas, improving the recycling effect of flue gas heat and improving the energy utilization rate.
In order to achieve the aim, the flue gas dust removal and desulfurization device for thermal power generation provided by the utility model comprises a first tank body and a water through valve, wherein the water through valve is communicated with the outer side wall of the first tank body; the flue gas desulfurization device comprises a first tank body, a second tank body, a gas inlet device, a filtering device, a desulfurization component, a conveying hopper, heat exchange pipes and a partition plate, wherein the bottom end of the conveying hopper is arranged at the inner bottom of the first tank body, the bottom end of the conveying hopper is communicated with the gas inlet device, the gas inlet device is used for conveying flue gas to the inner side of the conveying hopper, a plurality of groups of heat exchange pipes are communicated with the top end of the conveying hopper, the top ends of the heat exchange pipes are connected with the outer side wall of the partition plate, the filtering device is arranged on the partition plate and is used for filtering the flue gas, the desulfurization component is communicated with the inner side of the first tank body, the flue gas is conveyed to the inner side of the conveying hopper through the gas inlet device, the flue gas in the conveying hopper flows upwards through the plurality of groups of heat exchange pipes in a shunting way, then the particulate matters in two flue gas are filtered through the filtering device, then the flue gas desulfurization component is used for carrying out the flue gas desulfurization treatment, the purifying treatment effect of the flue gas is improved, the water is circularly conveyed in the first tank body through a water inlet valve, when the flue gas flows through the plurality of groups of heat exchange pipes, the heat exchange pipes heats the plurality of the heat exchange pipes, and the water in the first tank body is heated, so that the energy utilization efficiency is improved.
Preferably, the filtering device comprises a supporting plate, a filter screen, corrugated pipes, guide posts, springs and a vibrating motor, wherein the plurality of groups of filter screens are all arranged on the supporting plate, the bottoms of the plurality of groups of corrugated pipes are all arranged on the partition plate, the plurality of groups of corrugated pipes are respectively communicated with the plurality of groups of heat exchange pipes, the tops of the plurality of groups of corrugated pipes are all arranged on the supporting plate, the plurality of groups of corrugated pipes are respectively communicated with the plurality of groups of filter screens, the plurality of groups of guide posts are all arranged on the top of the partition plate, the supporting plate is vertically and slidably arranged on the plurality of groups of guide posts, the plurality of groups of springs are respectively matched and sleeved on the outer side walls of the plurality of groups of guide posts, the vibrating motor is arranged on the top of the supporting plate, flue gas discharged by the plurality of groups of heat exchange pipes flows upwards through the plurality of groups of corrugated pipes, the flue gas is filtered by the plurality of groups of filter screens, particulate matters in the flue gas are deposited at the bottom of the filter screens, and the filtered flue gas is discharged through the top of the first tank, and when the filter screens are required to be cleaned, the vibrating motor is driven to vibrate the supporting plate up and down so that the plurality of filter screens are vibrated down by opening the vibrating motor, thereby the filter screens deposited at the bottom of the filter screens are enabled to drop down.
Preferably, the desulfurization assembly comprises a conveying pipe, a desulfurization box, guide plates, a pump body and a spray pipe, wherein the input end of the conveying pipe is communicated with the top end of the first tank body, the output end of the conveying pipe is communicated with the bottom of the desulfurization box, an exhaust port is formed in the top end of the desulfurization box, multiple groups of guide plates are respectively installed on the inner side wall of the desulfurization box in a staggered mode, the top surfaces of the multiple groups of guide plates are all inclined planes, the input end of the pump body is communicated with the desulfurization box, the spray pipe is communicated with the output end of the pump body, the output end of the spray pipe extends into the desulfurization box, exhaust flue gas in the first tank body is conveyed into the desulfurization box through the conveying pipe, the flue gas entering the desulfurization box flows upwards from below, at the moment, the liquid containing oxidant in the desulfurization box is pumped through the spray pipe from top to bottom in the desulfurization box, so that the liquid is subjected to desulfurization treatment after being contacted with the flue gas, the flue gas is guided and conveyed through the multiple groups of guide plates, the flowing distance of the flue gas is increased, the contact time of the flue gas and the liquid is prolonged, and the flue gas desulfurization effect is improved.
Preferably, the air inlet device comprises a second tank body, an air inlet pipe and a sealing door, wherein the second tank body is communicated with the bottom end of the conveying hopper, the air inlet pipe is communicated with the outer side wall of the second tank body, the sealing door is communicated with the lower part of the outer side wall of the second tank body, dirt at the bottoms of the multiple groups of filter screens falls into the second tank body through the conveying hopper, the sealing door is opened, so that filtered dirt is discharged and cleaned, smoke is conveyed into the second tank body through the air inlet pipe, and the smoke is conveyed into the conveying hopper through the second tank body, so that the smoke purification treatment is facilitated.
Preferably, the device further comprises a blade and a driving motor, wherein the blade is rotatably arranged on the inner side wall of the second tank body, the driving motor is arranged at the bottom end of the second tank body, the output end of the driving motor is connected with the bottom end of the blade, and the blade is driven to rotate by opening the driving motor, so that the blade scrapes and cleans the inner side wall of the conveying hopper in the second tank body, and dirt which falls down is convenient to clean and discharge.
Preferably, the desulfurization device also comprises an exhaust hood, wherein the exhaust hood is communicated with the exhaust port of the desulfurization box, and the protection effect of the exhaust port of the desulfurization box is improved by arranging the exhaust hood.
Preferably, the flue gas purifying device further comprises an active carbon layer, wherein the active carbon layer is arranged in the exhaust hood, and the flue gas exhausted by the exhaust hood is adsorbed and filtered through the active carbon layer, so that the flue gas purifying effect is improved.
Compared with the prior art, the flue gas desulfurization device has the beneficial effects that the flue gas is conveyed to the inside of the conveying hopper through the air inlet device, the flue gas in the conveying hopper flows upwards through the plurality of groups of heat exchange pipes in a split manner, then particles in two flue gases of the filtering device are filtered, then the flue gas is desulfurized through the desulfurization component, the purifying treatment effect of the device on the flue gas is improved, the water is circularly conveyed in the first tank body through the water inlet valve, when the flue gas flows through the plurality of groups of heat exchange pipes, the heat of the flue gas heats the plurality of groups of heat exchange pipes, and the water in the first tank body is heated through the plurality of groups of heat exchange pipes, so that the flue gas heat recycling effect is improved, and the energy utilization rate is improved.
Drawings
FIG. 1 is a schematic illustration of an axially measured structure of the present utility model;
FIG. 2 is a schematic diagram of an axial structure of the first tank connected with a water-through valve and the like;
FIG. 3 is a schematic diagram of a partial structure of a support plate and a filter screen connected by a shaft;
FIG. 4 is a schematic diagram of a partial structure of a shaft measurement of a connection of a conveyor bucket with a heat exchange tube or the like;
FIG. 5 is a schematic diagram of an axial structure of a desulfurization tank connected to a baffle or the like.
The reference sign is 1, a first tank body; 2, a water passing valve, 3, a conveying hopper, 4, a heat exchange tube, 5, a baffle plate, 6, a supporting plate, 7, a filter screen, 8, a corrugated tube, 9, a guide post, 10, a spring, 11, a vibrating motor, 12, a conveying tube, 13, a desulfurization box, 14, a guide plate, 15, a pump body, 16, a water spraying tube, 17, a second tank body, 18, an air inlet tube, 19, a sealing door, 20, a blade, 21, a driving motor, 22, an exhaust hood, 23 and an active carbon layer.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. This utility model may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1:
As shown in fig. 1 and 3, the embodiment provides a flue gas dust removal and desulfurization device for thermal power generation, which comprises a first tank body 1, a water through valve 2, an air inlet device, a filtering device, a desulfurization component, a conveying hopper 3, a heat exchange tube 4 and a partition board 5, wherein the water through valve 2 is communicated with the outer side wall of the first tank body 1;
As shown in fig. 3, the filtering device comprises a supporting plate 6, a filter screen 7, corrugated pipes 8, guide posts 9, springs 10 and a vibration motor 11, wherein the plurality of groups of filter screens 7 are all installed on the supporting plate 6, the bottom ends of the plurality of groups of corrugated pipes 8 are all installed on the partition plate 5, the plurality of groups of corrugated pipes 8 are respectively communicated with the plurality of groups of heat exchange pipes 4, the top ends of the plurality of groups of corrugated pipes 8 are all installed on the supporting plate 6, the plurality of groups of filter screens 7 are respectively communicated with the plurality of groups of corrugated pipes 8, the plurality of groups of guide posts 9 are all installed on the top ends of the partition plate 5, the supporting plate 6 is vertically slidably installed on the plurality of groups of guide posts 9, the plurality of groups of springs 10 are respectively matched and sleeved on the outer side walls of the plurality of groups of guide posts 9, and the vibration motor 11 is installed on the top ends of the supporting plate 6;
In this embodiment, carry the flue gas to the conveying fill 3 inside through air inlet unit, the flue gas in the conveying fill 3 flows upwards through the reposition of redundant personnel of many groups heat exchange tube 4, afterwards the particulate matter filtration treatment in two flue gas of filter equipment, afterwards the rethread desulfurization subassembly is with flue gas desulfurization treatment, improve the purification treatment effect of device to the flue gas, carry the water circulation in first jar of body 1 through water valve 2, when the flue gas flows through many groups heat exchange tube 4, the heat of flue gas heats multiunit heat exchange tube 4, multiunit heat exchange tube 4 heats the water in the first jar of body 1, thereby improve flue gas heat recovery and utilization effect, improve the energy utilization ratio.
Example 2:
On the basis of embodiment 1, as shown in fig. 2, the flue gas dust removal and desulfurization device for thermal power generation provided by the embodiment, the desulfurization component comprises a conveying pipe 12, a desulfurization box 13, a guide plate 14, a pump body 15 and a spray pipe 16, wherein the input end of the conveying pipe 12 is communicated with the top end of a first tank body 1, the output end of the conveying pipe 12 is communicated with the lower part of the desulfurization box 13, the top end of the desulfurization box 13 is provided with an exhaust port, a plurality of groups of guide plates 14 are respectively arranged on the inner side wall of the desulfurization box 13 in a staggered manner, the top surfaces of the plurality of groups of guide plates 14 are all inclined surfaces, the input end of the pump body 15 is communicated with the desulfurization box 13, the spray pipe 16 is communicated with the output end of the pump body 15, and the output end of the spray pipe 16 extends into the desulfurization box 13;
As shown in fig. 3, the air inlet device comprises a second tank 17, an air inlet pipe 18 and a closing door 19, wherein the second tank 17 is communicated with the bottom end of the conveying hopper 3, the air inlet pipe 18 is communicated with the outer side wall of the second tank 17, and the closing door 19 is communicated with the lower part of the outer side wall of the second tank 17;
As shown in fig. 4, the device further comprises a paddle 20 and a driving motor 21, wherein the paddle 20 is rotatably arranged on the inner side wall of the second tank 17, the driving motor 21 is arranged at the bottom end of the second tank 17, and the output end of the driving motor 21 is connected with the bottom end of the paddle 20;
As shown in fig. 5, the desulfurization device further comprises an exhaust hood 22, wherein the exhaust hood 22 is arranged at an exhaust port of the desulfurization box 13 in a communicating manner;
As shown in fig. 2, the air exhaust hood further comprises an activated carbon layer 23, wherein the activated carbon layer 23 is arranged inside the air exhaust hood 22;
In this embodiment, the flue gas that multiunit heat exchange tube 4 was discharged flows upwards through multiunit bellows 8, filter the flue gas through multiunit filter screen 7, make the particulate matter dirt deposit in the flue gas in filter screen 7 bottom, filtered flue gas is discharged through first jar body 1 top, when needs to clear up filter screen 7, drive backup pad 6 and vibrate from top to bottom through opening vibrating motor 11, make backup pad 6 vibrate multiunit filter screen 7, thereby make the dirt that deposits in filter screen 7 bottom drop downwards, thereby improve multiunit filter screen 7 automatic cleaning's convenience, the flue gas that discharges in first jar body 1 carries into desulfurization box 13 inside through conveyer pipe 12, the flue gas that gets into desulfurization box 13 flows upwards from the bottom, at this moment, liquid that contains the oxidant in the desulfurization box 13 is extracted through pump body 15, the liquid of extraction is sprayed in desulfurization box 13 from the top down through spray pipe 16, thereby make the flue gas desulfurization process after liquid and flue gas contact, carry the flue gas guide through multiunit guide plate 14, increase the flow distance of flue gas, improve the contact time with the liquid, improve the flue gas desulfurization effect.
The embodiment provides a flue gas dust removal desulfurization device for thermal power is at the during operation, carry the flue gas to the transport fill 3 inside through air inlet unit, the flue gas in the transport fill 3 flows upwards through the reposition of redundant personnel of many groups of heat exchange tubes 4, afterwards filters the processing through particulate matter in two flue gases of filter equipment, later rethread desulfurization subassembly carries flue gas desulfurization, through water valve 2 with the circulation of warm water in first jar body 1, when the flue gas flows through many groups of heat exchange tubes 4, the heat of flue gas heats multiunit heat exchange tube 4, multiunit heat exchange tube 4 heats the water in the first jar body 1.
The vibration motor 11, the pump body 15 and the driving motor 21 of the flue gas dust removal and desulfurization device for thermal power generation are purchased in the market, and a person skilled in the art only needs to install and operate according to the attached use instruction without creative labor of the person skilled in the art.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (7)
1. The flue gas dust removal desulfurization device for the thermal power generation comprises a first tank body (1) and a water through valve (2), wherein the water through valve (2) is communicated with the outer side wall of the first tank body (1), and the flue gas dust removal desulfurization device is characterized by further comprising an air inlet device, a filtering device, a desulfurization component, a conveying hopper (3), heat exchange pipes (4) and a partition plate (5), wherein the conveying hopper (3) is arranged at the inner bottom of the first tank body (1), the bottom end of the conveying hopper (3) is communicated with the air inlet device, the air inlet device is used for conveying flue gas into the conveying hopper (3), a plurality of groups of heat exchange pipes (4) are all communicated with the top end of the conveying hopper (3), the top ends of the groups of heat exchange pipes (4) are all connected with the outer side wall of the partition plate (5), the filtering device is arranged on the partition plate (5), the filtering device is used for filtering flue gas, the desulfurization component is communicated with the first tank body (1), and the desulfurization component is used for desulfurizing flue gas.
2. The flue gas dust removal and desulfurization device for thermal power generation according to claim 1, wherein the filtering device comprises a supporting plate (6), a filter screen (7), corrugated pipes (8), guide posts (9), springs (10) and a vibration motor (11), wherein the plurality of groups of filter screens (7) are all installed on the supporting plate (6), the bottoms of the plurality of groups of corrugated pipes (8) are all installed on the partition plate (5), the plurality of groups of corrugated pipes (8) are respectively communicated with the plurality of groups of heat exchange pipes (4), the tops of the plurality of groups of corrugated pipes (8) are all installed on the supporting plate (6), the plurality of groups of filter screens (7) are respectively communicated with the plurality of groups of filter screens (7), the plurality of groups of guide posts (9) are all installed on the top of the partition plate (5), the plurality of groups of springs (10) are respectively matched and sleeved on the outer side walls of the plurality of groups of guide posts (9), and the vibration motor (11) are installed on the top of the supporting plate (6).
3. The flue gas dust removal and desulfurization device for thermal power generation according to claim 1, wherein the desulfurization component comprises a conveying pipe (12), a desulfurization box (13), guide plates (14), a pump body (15) and a water spraying pipe (16), wherein the input end of the conveying pipe (12) is communicated with the top end of the first tank body (1), the output end of the conveying pipe (12) is communicated with the lower part of the desulfurization box (13), the top end of the desulfurization box (13) is provided with an exhaust port, the guide plates (14) are respectively arranged on the inner side wall of the desulfurization box (13) in a staggered mode, the top surfaces of the guide plates (14) are all provided with inclined surfaces, the input end of the pump body (15) is communicated with the desulfurization box (13), the water spraying pipe (16) is communicated with the output end of the pump body (15), and the output end of the water spraying pipe (16) extends into the desulfurization box (13).
4. The flue gas dust removal and desulfurization device for thermal power generation according to claim 1, wherein the air inlet device comprises a second tank body (17), an air inlet pipe (18) and a sealing door (19), the second tank body (17) is communicated with the bottom end of the conveying hopper (3), the air inlet pipe (18) is communicated with the outer side wall of the second tank body (17), and the sealing door (19) is communicated with the lower part of the outer side wall of the second tank body (17).
5. The flue gas dust removal and desulfurization device for thermal power generation according to claim 4, further comprising a blade (20) and a driving motor (21), wherein the blade (20) is rotatably mounted on the inner side wall of the second tank body (17), the driving motor (21) is mounted at the bottom end of the second tank body (17), and the output end of the driving motor (21) is connected with the bottom end of the blade (20).
6. The flue gas dust removal and desulfurization device for thermal power generation according to claim 2, further comprising an exhaust hood (22), wherein the exhaust hood (22) is disposed at an exhaust port of the desulfurization tank (13) in a communicating manner.
7. The flue gas dust removal and desulfurization device for thermal power generation according to claim 6, further comprising an activated carbon layer (23), wherein the activated carbon layer (23) is disposed inside the exhaust hood (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420945467.2U CN222400714U (en) | 2024-05-06 | 2024-05-06 | Flue gas dust removal desulfurization device for thermal power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420945467.2U CN222400714U (en) | 2024-05-06 | 2024-05-06 | Flue gas dust removal desulfurization device for thermal power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222400714U true CN222400714U (en) | 2025-01-28 |
Family
ID=94354107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420945467.2U Active CN222400714U (en) | 2024-05-06 | 2024-05-06 | Flue gas dust removal desulfurization device for thermal power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222400714U (en) |
-
2024
- 2024-05-06 CN CN202420945467.2U patent/CN222400714U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210385192U (en) | A SOx/NOx control device for coal fired boiler flue gas is handled | |
| CN111135704B (en) | Comprehensive treatment system and method for high-temperature industrial flue gas | |
| CN221131400U (en) | Automatic smoke filtering and dust removing equipment | |
| CN212440557U (en) | Environment-friendly dust remover for industrial processing | |
| CN210786770U (en) | Waste gas treatment device for aluminum smelting furnace | |
| CN111514720A (en) | Integrative tower of SOx/NOx control dust removal defogging | |
| CN113457342B (en) | Waste gas treatment device for hot blast stove | |
| CN222400714U (en) | Flue gas dust removal desulfurization device for thermal power generation | |
| CN214598245U (en) | Desulfurization waste gas treatment equipment | |
| CN219399613U (en) | A dry desulfurization device for boiler high-sulfur flue gas | |
| CN111603935A (en) | An environmental protection equipment SCR soot blowing platform | |
| CN218306928U (en) | Ultra-low emission device for smoke pollutants of coal-fired boiler | |
| CN207356758U (en) | A kind of dust-extraction unit of filter bag capable of washing | |
| CN106984116B (en) | High-efficient gas purification tower and gas treatment system | |
| CN115990398A (en) | Aeration oxidation desulfurizing tower | |
| CN111974181B (en) | Flue gas processing apparatus in pitch workshop | |
| CN209968118U (en) | Volatile organic waste gas's on-line monitoring and catalytic treatment system | |
| CN112843968A (en) | Solid-state flue gas treatment device for chemical experiment | |
| CN112807933A (en) | Environment-friendly purifying equipment | |
| CN222173618U (en) | Desulfurization tower filtration equipment for easy flue gas recovery | |
| CN219441041U (en) | Flue gas carbon capture equipment | |
| CN219976767U (en) | Boiler heat recovery device | |
| CN217188828U (en) | Flue gas dust removal and desulfurization device for aluminum alloy smelting furnace | |
| CN221339171U (en) | Silica gel production hot melting device with exhaust-gas treatment structure | |
| CN216630282U (en) | Device for removing sulfur dioxide in industrial waste gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |