CN215138291U - Organic waste gas treatment system - Google Patents
Organic waste gas treatment system Download PDFInfo
- Publication number
- CN215138291U CN215138291U CN202121466895.XU CN202121466895U CN215138291U CN 215138291 U CN215138291 U CN 215138291U CN 202121466895 U CN202121466895 U CN 202121466895U CN 215138291 U CN215138291 U CN 215138291U
- Authority
- CN
- China
- Prior art keywords
- waste gas
- organic waste
- photolysis
- treatment system
- adsorption
- 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
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses an organic waste gas treatment system, including waste gas collection device, filter equipment, the photolysis device, adsorption equipment and exhaust apparatus, waste gas collection device can concentrate the organic waste gas that the workshop produced, filter equipment can filter the tiny granule in the organic waste gas, the photolysis device can carry out photolysis to the organic waste gas after filtering and handle, adsorption equipment can adsorb the pollutant in the organic waste gas, make pollutant and gas mixture separation in the organic waste gas, reach the purpose of purifying organic waste gas, can reach emission standard from the adsorption equipment combustion gas, exhaust apparatus will handle the gas discharge up to standard after in the atmosphere, the utility model has the advantages of simple structure, the cost is lower, organic waste gas's treatment effect preferred can reach the emission requirement.
Description
Technical Field
The utility model relates to an organic waste gas treatment system.
Background
In the surface pretreatment course of working of shipbuilding steel sheet, can involve transferring the lacquer, spray paint and spray paint the steel sheet after drying to the steel sheet, and transfer the lacquer, spray paint, dry in-process and have a large amount of volatile organic waste gas to produce, if with organic waste gas direct emission get into the atmosphere, can cause abominable influence to health and ecological environment.
At present, common methods for treating organic waste gas include a direct combustion method, a catalytic combustion method, a cooling solidification treatment method and the like, but such methods generally have high cost, poor organic waste gas treatment effect and poor energy-saving effect, and in addition, most production workshops directly treat organic waste gas without filtering dust particles in the waste gas, so that the quality of the discharged gas is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an organic waste gas treatment system to solve at least one among the above-mentioned technical problem.
According to one aspect of the utility model, an organic waste gas treatment system is provided, which comprises a waste gas collecting device, a filtering device, a photolysis device, an adsorption device and an exhaust device,
the waste gas collecting device, the filtering device, the photolysis device, the adsorption device and the exhaust device are connected in sequence,
waste gas collection device will collect organic waste gas arrange to filter equipment and filter, and filter equipment will filter organic waste gas arrange to the photolysis device after and carry out the photolysis and handle, and the photolysis device is arranged the organic waste gas after the photolysis to adsorption equipment and is adsorbed and handled, and adsorption equipment arranges the organic waste gas after handling to exhaust apparatus, and exhaust apparatus will handle the gas outgoing to the atmosphere in.
The technical scheme of the utility model, waste gas collection device can concentrate the organic waste gas that the workshop produced, and filter equipment can filter the tiny granule in the organic waste gas, and the photolysis device can carry out the photolysis to the organic waste gas after filtering and handle, and adsorption equipment can adsorb the pollutant in the organic waste gas, makes pollutant and gas mixture separation in the organic waste gas, reaches the purpose of purifying organic waste gas, can reach emission standard from the adsorption equipment combustion gas, and exhaust apparatus will handle the gas emission up to standard in the back to the atmosphere, the utility model has the advantages of simple structure, the cost is lower, and organic waste gas's treatment effect preferred can reach the emission requirement.
In some embodiments, the exhaust gas collecting device may include a gas collecting hood and an exhaust fan, the exhaust fan is disposed in the gas collecting hood, and the organic exhaust gas collected by the exhaust fan gas collecting hood is discharged to the filtering device for filtering. Therefore, under the action of the exhaust fan, the gas collecting hood can collect the organic waste gas generated in the workshop quickly and intensively.
In some embodiments, the gas collecting hood may include a hood body and a pipe body, one end of the pipe body is communicated with one end of the hood body, the other end of the pipe body is communicated with the filtering device, the exhaust fan is arranged on the pipe body, the hood body is in a conical shape, and the opening area of one end of the hood body is one tenth of the opening area of the other end of the hood body. Therefore, under the action of the exhaust fan, the conical cover body can intensively collect the organic waste gas generated in a workshop into the pipe body and then discharge the organic waste gas to the filtering device for filtering treatment.
In some embodiments, the filter device may be a dry paint mist filter, which is made of a stack of multiple layers of fiberglass mesh,
the density of the multiple layers of glass fiber webs increases gradually from the inlet end to the outlet end of the filter device.
Therefore, when organic waste gas generated in the processes of paint mixing, paint spraying and drying passes through the dry paint mist filter, paint mist particles in the organic waste gas can be intercepted, collided and absorbed by the multiple layers of glass fiber nets in the dry paint mist filter and gradually weathered into powder, so that the purpose of purifying the organic waste gas is achieved, dry purification can be achieved through the dry paint mist filter, water is not needed, secondary pollution is avoided, the environment is protected, energy is saved, the purification efficiency is high, the dust holding capacity is large, and the purification efficiency can reach more than 85%.
In some embodiments, the photolysis device can be a UV photolysis purification device. Thus, UThe V photolysis purifier irradiates organic waste gas with special high-energy high-ozone UV light beam to crack molecular bonds of the organic waste gas, so that pollutant molecules in a free state are oxidized with ozone to be combined into small-molecule harmless or low-harm compounds, such as CO2、H2O, etc., and ozone has strong oxidizing effect on organic matters.
In some embodiments, the adsorption device may be an activated carbon adsorption purge bin. From this, the active carbon adsorption purifying box can adsorb the pollutant in the waste gas on the surface of active carbon, makes the pollutant in the organic waste gas separate with gas mixture, reaches the purpose of purifying organic waste gas.
In some embodiments, the activated carbon adsorption purification box can be made by stacking multiple layers of carbon beds made of granular activated carbon, honeycomb activated carbon, or activated carbon fibers. Therefore, the multi-layer carbon bed made of granular activated carbon, honeycomb activated carbon or activated carbon fiber can ensure the adsorption rate of pollutants in organic waste gas, thereby ensuring the purification effect and enabling the gas discharged from the activated carbon adsorption purification box to reach the discharge standard.
In some embodiments, the exhaust device may include a centrifugal fan and a chimney, an air inlet of the centrifugal fan is connected to the adsorption device, an air outlet of the centrifugal fan is connected to the chimney, and the centrifugal fan exhausts the gas treated by the adsorption device to the chimney. Thus, the centrifugal fan can discharge the purified gas to the atmosphere through the chimney.
In some embodiments, the height of the chimney may be greater than or equal to 15 m. Thus, a chimney at least 15m high can ensure that the purified gas is discharged into the air without affecting the objects on the ground surface.
In some embodiments, the system may further include a cyclone dust collector, the cyclone dust collector is disposed between the exhaust gas collecting device and the filtering device, and the cyclone dust collector removes dust from the organic exhaust gas collected by the exhaust gas collecting device and discharges the organic exhaust gas after dust removal to the filtering device for filtering. Therefore, the cyclone dust collector can rotate the organic waste gas containing dust, separates dust particles from the air flow by means of centrifugal force and collects the dust particles on the wall of the device, and enables the dust particles to fall into the dust hopper by means of gravity, so that the amount of the dust particles in the organic waste gas entering the filtering device is greatly reduced, and the purification quality of the organic waste gas in the subsequent treatment process is ensured.
Drawings
FIG. 1 is a schematic structural diagram of an organic waste gas treatment system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an organic waste gas treatment system according to another embodiment of the present invention.
Detailed Description
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The first embodiment is as follows:
fig. 1 schematically shows the structure of an organic waste gas treatment system according to an embodiment of the present invention.
Referring to fig. 1, the organic waste gas treatment system includes a waste gas collecting device, a filtering device 2, a photolysis device 3, an adsorption device 4, and an exhaust device.
Referring to fig. 1, the exhaust gas collecting device, the filtering device 2, the photolysis device 3, the adsorption device 4, and the exhaust device are connected and communicated in sequence.
Referring to fig. 1, the exhaust gas collection device includes a gas collecting channel 11 and a suction fan 12.
Referring to fig. 1, the gas collecting channel 11 includes a channel body 111 and a channel body 112, wherein the lower end of the channel body 112 is communicated with the upper end of the channel body 111, the upper end of the channel body 112 is communicated with the left end of the filtering device 2, the exhaust fan 12 is installed on the channel body 112, the channel body 111 is installed at the top of a workshop where organic waste gas is generated, and the exhaust fan 12 can exhaust the organic waste gas collected by the gas collecting channel 11 to the filtering device 2 for filtering treatment.
Referring to fig. 1, the cover 111 has a conical shape, and the conical cover 111 can collect organic waste gas generated in a workshop into the pipe 112 under the action of the exhaust fan 12, and then discharge the organic waste gas to the filtering device 2 for filtering treatment. In this embodiment, the opening area of the lower end of the cover 111 is ten times the opening area of the upper end of the cover 111. In other embodiments, the ratio of the opening area of the lower end of the cover 111 to the opening area of the upper end of the cover 111 may be specifically adjusted according to the area of the plant and the amount of organic waste gas generated.
Referring to fig. 1, the left end of the filter device 2 is communicated with the tube 112, and the right end of the filter device 2 is communicated with the photolysis device 3, in this embodiment, the filter device 2 is a dry paint mist filter, the dry paint mist filter is made by overlapping multiple layers of glass fiber nets 21 or arranged at a certain distance, and the density of the multiple layers of glass fiber nets 21 is gradually increased from the left end to the right end of the filter device 2; when organic waste gas generated in the processes of paint mixing, paint spraying and drying passes through the dry paint mist filter, paint mist particles in the organic waste gas can be intercepted, collided and absorbed by the multiple layers of glass fiber nets 21 in the dry paint mist filter and gradually weathered into powder, so that the aim of purifying the organic waste gas is fulfilled.
Referring to fig. 1, the photolysis device 3 is connected to the right end of the filter device 2 through a pipe, and the organic waste gas is filtered by the filter device 2 and enters the photolysis device 3 for photolysis.
Referring to fig. 1, the photolysis device 3 is a UV photolysis purification device, which irradiates organic waste gas with a special high-energy high-ozone UV beam to crack molecular bonds of the organic waste gas, so that the contaminant molecules in a free state are oxidized and combined with ozone to form small molecules, which are harmless or harmless, and the UV photolysis purification device is a UV photolysis purification deviceLess harmful compounds, e.g. CO2、H2O, and the like, and the high-energy high-ozone UV light beam is utilized to decompose oxygen molecules in the air to generate free oxygen, namely active oxygen, and the free oxygen is required to be combined with the oxygen molecules because positive and negative electrons carried by the free oxygen are unbalanced, so that ozone is generated, has extremely strong oxidation effect on organic matters, and can play a very good removing effect on pollutants in organic waste gas.
Referring to fig. 1, the right end of the photolysis device 3 is communicated with the left end of the adsorption device 4 through a pipeline, and the organic waste gas enters the adsorption device 4 for adsorption treatment after being subjected to photolysis treatment by the photolysis device 3.
Referring to fig. 1, the adsorption device 4 is an activated carbon adsorption purification box, the activated carbon adsorption purification box 4 is made of multiple layers of carbon beds 41 by stacking or arranged at certain intervals, the carbon beds 41 can be made of granular activated carbon, honeycomb activated carbon or activated carbon fiber, and the activated carbon has developed gaps, large specific surface area and high adsorption capacity; when organic waste gas passes through the multi-layer carbon bed 41, the adsorption capacity of the surface of the activated carbon is utilized, the organic waste gas is in contact with the porous activated carbon with a large surface, pollutants in the organic waste gas can be adsorbed on the surface of the activated carbon, the pollutants in the organic waste gas are separated from a gas mixture, and the purpose of purifying the organic waste gas is achieved.
Referring to fig. 1, the exhaust device includes a centrifugal fan 51 and a chimney 52, an air inlet (left end) of the centrifugal fan 51 is communicated with the right end of the adsorption device 4 through a pipeline, an air outlet (right end) of the centrifugal fan 51 is communicated with the chimney 52 through a pipeline, the centrifugal fan 51 can exhaust the gas treated by the adsorption device 4 to the chimney 52, and the chimney 52 can exhaust the treated gas to the atmosphere.
The height of the chimney 52 is equal to or greater than 15m, and the chimney 52 with the height of at least 15m can ensure that the purified gas is discharged into the air without influencing objects on the ground surface.
According to the requirements of the field, in order to improve the discharge speed of the organic waste gas, an exhaust fan can be properly added on a pipeline to carry out conveying assistance.
Referring to fig. 1, a cover 111 is installed on the top of a plant (e.g., a steel plate surface pretreatment processing plant) generating organic waste gas, under the action of an exhaust fan 12, the cover 111 can collect the organic waste gas generated in the plant into a pipe 112, and then discharge the organic waste gas into a filter 2, wherein paint mist particles in the organic waste gas can be intercepted, collided and absorbed by a multi-layer glass fiber net 21 in a dry paint mist filter, and gradually weathered into powder, so as to achieve the purpose of purifying the organic waste gas, the organic waste gas is filtered by the filter 2 and then enters a photolysis device 3 for photolysis treatment, the UV photolysis purification device irradiates the organic waste gas with a special high-energy ozone UV light beam, and molecular bonds of the organic waste gas are cracked, so that pollutant molecules in a free state and ozone are combined into harmless or low-harmful compounds, such as CO2、H2O, etc., organic waste gas gets into adsorption equipment 4 and adsorbs the processing after the photolysis of photolysis device 3, the adsorption capacity on activated carbon surface is utilized to the activated carbon adsorption purifying box, make organic waste gas and the porous active carbon on big surface contact, pollutant among the organic waste gas can be adsorbed on the activated carbon surface, make pollutant and gas mixture separation among the organic waste gas, reach the purpose of purifying organic waste gas, can reach emission standard from 4 combustion gas of adsorption equipment, centrifugal fan 51 is arranged the gas after 4 processing of adsorption equipment to chimney 52, chimney 52 will handle the gas up to standard after discharge to the atmosphere, the utility model has the advantages of simple structure, the cost is lower, organic waste gas's treatment effect preferred can reach the emission requirement.
Example two:
fig. 2 schematically shows the structure of an organic waste gas treatment system according to another embodiment of the present invention.
Referring to fig. 2, the organic waste gas treatment system includes a waste gas collecting device, a filtering device 2, a photolysis device 3, an adsorption device 4, and an exhaust device. In addition, the organic exhaust gas treatment system may further include a cyclone 6.
In this embodiment, the structures of the exhaust gas collecting device, the filtering device 2, the photolysis device 3, the adsorption device 4, and the exhaust device are the same as those of the first embodiment, and are not described herein again. The difference between this embodiment and the first embodiment is that a cyclone dust collector 6 is installed between the exhaust gas collecting device and the filtering device 2.
Referring to fig. 2, the exhaust gas collecting device, the cyclone 6, the filtering device 2, the photolysis device 3, the adsorption device 4, and the exhaust device are connected and communicated in sequence.
Referring to fig. 2, the lower end of the cyclone dust collector 6 is communicated with the tube 112, the upper end of the cyclone dust collector 6 is communicated with the left end of the filtering device 2, the cyclone dust collector 6 can rotate the organic waste gas containing dust, separate the dust particles from the air flow by means of centrifugal force and collect the dust particles on the wall of the device, and then the dust particles fall into the dust hopper by means of gravity, so that the amount of the dust particles in the organic waste gas entering the filtering device 2 is greatly reduced, and the purification quality of the organic waste gas in the subsequent treatment process is ensured; the cyclone dust collector 6 can remove dust from the organic waste gas collected by the cover 111, and the organic waste gas after dust removal enters the filtering device 2 for filtering.
Referring to fig. 2, a cover 111 is installed on the top of a workshop (e.g., a steel plate surface pretreatment processing workshop for shipbuilding) generating organic waste gas, under the action of an exhaust fan 12, the cover 111 can collect the organic waste gas generated in the workshop into a pipe 112 and then discharge the organic waste gas into a cyclone dust collector 6, the cyclone dust collector 6 can collect dust in the organic waste gas to greatly reduce the amount of dust particles in the organic waste gas entering a filter device 2, the organic waste gas after dust collection enters the filter device 2, paint mist particles in the organic waste gas can be intercepted, collided and absorbed by a multi-layer glass fiber net 21 in a dry paint mist filter and gradually weathered into powder to achieve the purpose of purifying the organic waste gas, the organic waste gas enters a photolysis device 3 after being filtered by the filter device 2 for photolysis treatment, the UV photolysis purification device irradiates the organic waste gas with a specially-made high-energy high ozone UV beam, cracking molecular bonds of the organic waste gas to oxidize and combine free pollutant molecules with ozone into small harmless or low harmful compounds, such as CO2、H2O, etc., organic waste gas is photolyzed by the photolysis device 3Get into adsorption equipment 4 and adsorb the processing after handling, the adsorption capacity on activated carbon adsorption purifying box utilized the active carbon surface, make organic waste gas and the porous active carbon on big surface contact, pollutant among the organic waste gas can be adsorbed on the active carbon surface, make pollutant and gas mixture separation among the organic waste gas, reach the purpose of purifying organic waste gas, can reach emission standard from 4 combustion gas of adsorption equipment, the gas after centrifugal fan 51 handled adsorption equipment 4 is arranged to chimney 52 in, chimney 52 will handle the gas up to standard after discharge to the atmosphere, the utility model has the advantages of simple structure, the cost is lower, organic waste gas's treatment effect preferred can reach the emission requirement.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.
Claims (10)
1. The organic waste gas treatment system is characterized by comprising a waste gas collecting device, a filtering device, a photolysis device, an adsorption device and an exhaust device,
the waste gas collecting device, the filtering device, the photolysis device, the adsorption device and the exhaust device are connected in sequence,
waste gas collection device will collect organic waste gas arrange to filter equipment and filter, and filter equipment will filter organic waste gas arrange to the photolysis device after and carry out the photolysis and handle, and the photolysis device is arranged the organic waste gas after the photolysis to adsorption equipment and is adsorbed and handled, and adsorption equipment arranges the organic waste gas after handling to exhaust apparatus, and exhaust apparatus will handle the gas outgoing to the atmosphere in.
2. The organic waste gas treatment system of claim 1, wherein the waste gas collecting device comprises a gas collecting hood and an exhaust fan, the exhaust fan is arranged in the gas collecting hood, and the exhaust fan discharges the organic waste gas collected by the gas collecting hood to the filtering device for filtering.
3. The organic waste gas treatment system according to claim 2, wherein the gas collecting hood comprises a hood body and a pipe body, one end of the pipe body is communicated with one end of the hood body, the other end of the pipe body is communicated with the filtering device, the exhaust fan is arranged on the pipe body, the hood body is in a conical shape, and the opening area of one end of the hood body is one tenth of the opening area of the other end of the hood body.
4. The organic waste gas treatment system according to claim 1, wherein the filtering device is a dry paint mist filter made of a plurality of layers of glass fiber mesh stacked together,
the density of the multiple layers of glass fiber webs increases gradually from the inlet end to the outlet end of the filter device.
5. The organic waste gas treatment system according to claim 1, wherein the photolysis device is a UV photolysis purification device.
6. The organic waste gas treatment system according to claim 1, wherein the adsorption device is an activated carbon adsorption purification tank.
7. The organic waste gas treatment system according to claim 6, wherein the activated carbon adsorption purification box is made by stacking a plurality of layers of carbon beds,
the carbon bed is made of granular activated carbon, honeycomb activated carbon or activated carbon fiber.
8. The organic waste gas treatment system of claim 1, wherein the exhaust device comprises a centrifugal fan and a chimney, an air inlet of the centrifugal fan is connected with the adsorption device, an air outlet of the centrifugal fan is connected with the chimney, and the centrifugal fan exhausts the gas treated by the adsorption device into the chimney.
9. The organic waste gas treatment system of claim 8, wherein the height of the chimney is equal to or greater than 15 m.
10. The organic waste gas treatment system according to any one of claims 1 to 9, further comprising a cyclone dust collector, wherein the cyclone dust collector is arranged between the waste gas collection device and the filtering device, and is used for removing dust from the organic waste gas collected by the waste gas collection device and discharging the organic waste gas after dust removal to the filtering device for filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121466895.XU CN215138291U (en) | 2021-06-29 | 2021-06-29 | Organic waste gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121466895.XU CN215138291U (en) | 2021-06-29 | 2021-06-29 | Organic waste gas treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215138291U true CN215138291U (en) | 2021-12-14 |
Family
ID=79381229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121466895.XU Active CN215138291U (en) | 2021-06-29 | 2021-06-29 | Organic waste gas treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215138291U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984678A (en) * | 2022-06-02 | 2022-09-02 | 汪凤銮 | Waste gas collecting and treating device |
-
2021
- 2021-06-29 CN CN202121466895.XU patent/CN215138291U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984678A (en) * | 2022-06-02 | 2022-09-02 | 汪凤銮 | Waste gas collecting and treating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2007237101A (en) | Air cleaning apparatus and coating equipment | |
| CN106861368A (en) | A kind of use for laboratory catalytic converter | |
| CN208115480U (en) | A kind of emission-control equipment of co-oxidation | |
| CN215138291U (en) | Organic waste gas treatment system | |
| CN205965456U (en) | Organic waste gas integrated treating equipment | |
| CN205461588U (en) | Papermaking waste gas treatment system | |
| CN210410218U (en) | UV photolysis equipment for VOCs treatment | |
| CN206184229U (en) | Low temperature plasma ultraviolet photolysis exhaust gas cleaner | |
| CN210385482U (en) | Water sprays clarification plant with light oxygen purification performance | |
| CN204973576U (en) | Administer device of synthetic leather waste gas | |
| CN209809842U (en) | Exhaust-gas treatment tail exhaust secondary treatment device | |
| CN111266006A (en) | Integrated combined purifier | |
| CN207012786U (en) | A kind of house exhaust processing unit | |
| CN206381826U (en) | A kind of industrial fumes gas purifying equipment | |
| CN205549946U (en) | Modular spraying exhaust gas purification system | |
| CN214345318U (en) | Processing apparatus for exhaust purification | |
| CN108043216A (en) | A kind of paint exhaust treatment device and method | |
| CN212091693U (en) | Integrated combined purifier | |
| CN207856604U (en) | A kind of organic waste gas treatment device | |
| CN208626975U (en) | A kind of equipment for handling oily room exhaust gas | |
| CN210448738U (en) | Automobile maintenance trade exhaust purification treatment equipment | |
| CN210546932U (en) | Modified asphalt waterproofing membrane exhaust-gas treatment system | |
| CN210645692U (en) | Be used for workshop environmental protection dust remover of moulding plastics | |
| CN218107168U (en) | A exhaust treatment device for spraying | |
| CN215462978U (en) | Novel light oxygen adds active carbon exhaust-gas treatment equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |