CN207385172U - A kind of gas cleaning environmental protection equipment - Google Patents
A kind of gas cleaning environmental protection equipment Download PDFInfo
- Publication number
- CN207385172U CN207385172U CN201721418649.0U CN201721418649U CN207385172U CN 207385172 U CN207385172 U CN 207385172U CN 201721418649 U CN201721418649 U CN 201721418649U CN 207385172 U CN207385172 U CN 207385172U
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- CN
- China
- Prior art keywords
- purifying column
- air
- air inlet
- gas
- flue gas
- 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.)
- Expired - Fee Related
Links
- 230000007613 environmental effect Effects 0.000 title claims abstract description 33
- 238000004140 cleaning Methods 0.000 title claims abstract description 31
- 239000003546 flue gas Substances 0.000 claims abstract description 81
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000007789 gas Substances 0.000 claims abstract description 75
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003595 mist Substances 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims description 17
- 239000000779 smoke Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 239000012717 electrostatic precipitator Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 20
- 241000894006 Bacteria Species 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000746 purification Methods 0.000 description 10
- 230000001954 sterilising effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- VCZKTIKPEDMZNW-UHFFFAOYSA-N O=S(=O)=S Chemical class O=S(=O)=S VCZKTIKPEDMZNW-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- -1 flue gas Nitrogen oxides Chemical class 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of gas cleaning environmental protection equipments, including air-suction cover, the first purifying column, the second purifying column, fixed frame, the first flue gas runner pipe, the second flue gas runner pipe and exhaust pipe, air-suction cover, the first purifying column, the second purifying column, exhaust pipe are arranged at intervals each other, and the first purifying column, the second purifying column are arranged on fixed frame；Ozone output device is provided in first purifying column, the inner wall of the second purifying column is disposed with water mist blowoff, activated carbon filter plate, desulfurizer and nitrogen rejection facility from top to bottom.By the above-mentioned means, the utility model can comprehensively handle the polluters such as dust, nitrogen oxides, sulfide, organic pollution, bacterium contained in flue gas, and then promote environmental quality.
Description
Technical field
The utility model is related to technical field of environment protection equipment, more particularly to a kind of gas cleaning environmental protection equipment.
Background technology
Air is the most basic important environment of human survival, it not only carries out heat, momentum and water by displacement and provides
The profile adjustment process in source, and create a suitable living environment to the mankind effectively protects the mankind and tellurian
Biology.But the continuous development of the increase and industrial economy with human being's production and social activities, the burning of a large amount of fuel,
A large amount of discharges of the flue gases such as industrial waste gas, give off sulfur dioxide, nitrogen oxides, flue dust, organic pollution, bacterium etc., make big
Compression ring border deteriorates increasingly.Main source.Smoke discharge amount is huge, can give existence, life, work, the sustainable development of the mankind
It brings and seriously affects.Therefore, controlling the technical equipment of smoke pollution just seems quite important.
Existing flue gas purifying equipment is simple in structure, some of the contaminants being only capable of in processing flue gas, after purified treatment
Flue gas still has dysgenic pollutant component, bacterium etc. containing more multipair air quality, and purified treatment scope compares limitation, flue gas
Treatment effect is bad, and then causes harmful effect to environmental quality.
Utility model content
The utility model can be handled comprehensively mainly solving the technical problems that provide a kind of gas cleaning environmental protection equipment
The polluters such as contained dust, nitrogen oxides, sulfide, organic pollution, bacterium in flue gas, and then promote environment matter
Amount.
In order to solve the above technical problems, the technical solution that the utility model uses is：A kind of gas cleaning ring is provided
Equipment is protected, including air-suction cover, the first purifying column, the second purifying column, fixed frame, the first flue gas runner pipe, the second flue gas runner pipe
And exhaust pipe, wherein, the first flue gas runner pipe is provided with the first air inlet, the first gas outlet, and the first air inlet goes out with first
Gas port is respectively arranged at the both ends of the first flue gas runner pipe, and the second flue gas runner pipe is provided with the second air inlet, the 3rd air inlet
And the 3rd gas outlet, the second air inlet and the second gas outlet are respectively arranged at the both ends of the second flue gas runner pipe, the 3rd air inlet
Mouth is arranged between the second air inlet and the second gas outlet；Air-suction cover, the first purifying column, the second purifying column, exhaust pipe are equal each other
It is arranged at intervals, and the first purifying column, the second purifying column are arranged on fixed frame；The top of air-suction cover is provided with an at least outlet
Mouthful, the gas outlet of air-suction cover is connected with the first air inlet, and the bottom of air-suction cover is all around provided around the soft curtains of PVC；Second purification
The air inlet of tower is connected with the first gas outlet, so that air-suction cover is connected with the second purifying column, and the first purifying column and the second purification
Tower is to be arranged in parallel；The gas outlet of first purifying column is connected with the second air inlet, the gas outlet of the second purifying column and the 3rd air inlet
The air inlet of mouth connection, the second gas outlet and exhaust pipe connects, wherein exhaust inside pipe wall is provided with air-introduced machine；First purifying column
Ozone output device is inside provided with, the inner wall of the second purifying column is disposed with water mist blowoff, activated carbon mistake from top to bottom
Filter plate, desulfurizer and nitrogen rejection facility.
Further, the first flue gas runner pipe is provided with the 4th air inlet, and the 4th air inlet is set with the first air inlet interval
It puts, another gas outlet connection of the 4th air inlet and air-suction cover.
Further, the inner wall of the second purifying column is provided with waste residue collection device and below nitrogen rejection facility.
Further, the inner wall of the second purifying column is additionally provided with lower air-introduced machine and above water mist blowoff.
Further, the inner wall of the second purifying column is additionally provided with electrostatic precipitator and below nitrogen rejection facility.
Further, the inner wall of the second purifying column is additionally provided with smoke temperature reducer and above water mist blowoff.
Further, the bottom of fixed frame is provided with fixable universal caster wheel.
Further, air-suction cover, the first purifying column, the second purifying column, exhaust pipe are horizontally arranged at interval successively from left to right.
Further, gas cleaning environmental protection equipment further includes heat exchange case, and the gas outlet of heat exchange case and exhaust pipe connects,
For absorbing the heat in the flue gas after purified treatment.
The beneficial effects of the utility model are：The situation of the prior art is different from, flue gas disclosed in the utility model is net
Change environmental protection equipment, by setting the first purifying column, the second purifying column, and ozone output device, the are provided in the first purifying column
Water mist blowoff, activated carbon filter plate, desulfurizer and nitrogen rejection facility, the output of the first purifying column are provided in two purifying columns
Ozone further the flue gas after purified treatment in the second purifying column can be aoxidized, sterilizing, so as to comprehensive
The polluters such as contained dust, nitrogen oxides, sulfide, organic pollution, bacterium in ground processing flue gas, and then enhancing ring
Border quality.
Description of the drawings
Fig. 1 is the structure diagram of the utility model gas cleaning environmental protection equipment first embodiment；
Fig. 2 is section of the utility model gas cleaning environmental protection equipment the second purifying column of first embodiment along vertical plane direction
Figure；
Fig. 3 is the structure diagram of the utility model gas cleaning environmental protection equipment second embodiment.
Specific embodiment
Referring to Fig. 1, Fig. 1 is the structure diagram of the utility model gas cleaning environmental protection equipment first embodiment.This reality
Include air-suction cover 11, the first purifying column 12, the second purifying column 13, fixation with the gas cleaning environmental protection equipment of new first embodiment
Frame 14, the first flue gas runner pipe 15, the second flue gas runner pipe 16 and exhaust pipe 17.Air-suction cover 11 is exclusive for absorbing extraneous institute
The flue gas with polluter, the first purifying column 12 is for output ozone to carry out oxidation disinfection disinfection, the second purification to flue gas
Tower 13 is used for purified treatment flue gas, the first flue gas runner pipe 15 and the second flue gas runner pipe 16 and is oriented to flue gas for circulating, row
Tracheae 17 is for discharge treated the flue gas that circulates.
Wherein, the first flue gas runner pipe 15 is provided with the first air inlet 151, the first gas outlet 152, the first air inlet 151
Be respectively arranged at the both ends of the first flue gas runner pipe 15 with the first gas outlet 152, the second flue gas runner pipe 16 be provided with second into
Gas port 161, the 3rd air inlet 162 and the second gas outlet 163, the second air inlet 161 are respectively arranged at the second gas outlet 163
The both ends of second flue gas runner pipe 16, the 3rd air inlet 162 are arranged between the second air inlet 161 and the second gas outlet 163.The
One flue gas runner pipe 15 extends from one end to the other side in the horizontal direction with the second flue gas runner pipe 16；Further, for more
It circulates well and dredges flue gas, the first flue gas runner pipe 15, the second flue gas runner pipe 16 can set the pipeline with high low head.
Air-suction cover 11, the first purifying column 12, the second purifying column 13, exhaust pipe 17 are arranged at intervals each other, present embodiment
In, air-suction cover 11, the first purifying column 12, the second purifying column 13, exhaust pipe 17 are horizontally arranged at interval successively from left to right, at other
In embodiment or air-suction cover 11, the first purifying column 12, the second purifying column 13 are horizontally arranged at interval successively from left to right,
Exhaust pipe 17 is not provided with being arranged at the vertical one side of the second purifying column 13 in the horizontal one side of the second purifying column 13, to save cigarette
The space of gas purification environmental-protection equipment, does not make too many restrictions herein.
First purifying column 12, the second purifying column 13 are arranged on fixed frame 14；The top of air-suction cover 11 is provided at least one
Gas outlet, the gas outlet of air-suction cover 11 are connected with the first air inlet 151.It is soft that the bottom of air-suction cover 11 is all around provided around PVC
Curtain 111 can play the role of preferably gathering flue gas, reduce the loss of untreated flue gas, improve gas cleaning handling rate.
The air inlet of second purifying column 13 is connected with the first gas outlet 152, so that air-suction cover 11 is circulated by the first flue gas
Pipe 15 is connected with the second purifying column 13.The gas outlet of first purifying column 12 is connected with the second air inlet 161, the second purifying column 13
Gas outlet is connected with the 3rd air inlet 162, and the 3rd gas outlet 163 is connected with the air inlet of exhaust pipe 17, wherein in exhaust pipe 17
Wall is provided with air-introduced machine 171, and flue gas of the air-introduced machine 171 for after preferably guiding purified treatment discharges exhaust pipe 17 on this,
Promote gas cleaning treatment effeciency.
Ozone output device (not shown) is provided in first purifying column 12, for output ozone with to organic in flue gas
The polluters such as pollutant, bacterium are aoxidized, sterilizing.Referring to Fig. 2, the inner wall of the second purifying column 13 from top to bottom according to
It is secondary to be provided with water mist blowoff 123, activated carbon filter plate 124, desulfurizer 125 and nitrogen rejection facility 126, with to flowing through
Flue gas in two purifying columns 13 carries out purified treatment.Wherein, the concretely waterfog head of water mist blowoff 123, for removing
Contained dust bulky grain in flue gas；Activated carbon filter plate 124 is used to draw smog, tar, the aromatic hydrocarbon in flue gas, removal
Peculiar smell；Desulfurizer 125 is used to draw the sulfur dioxide sulfides in flue gas；Nitrogen rejection facility 126 is used to draw in flue gas
Nitrogen oxides.
The gas cleaning environmental protection equipment course of work of the utility model first embodiment is：Air-suction cover 11 draws the external world first
The flue gas containing polluter discharged, afterwards flue gas flow through the first flue gas runner pipe 15, flue gas enters through the first gas outlet 152
Second purifying column 13, afterwards flue gas in the second purifying column 13 successively by water mist blowoff 123, activated carbon filter plate 124,
The corresponding purified treatment of desulfurizer 125 and nitrogen rejection facility 126, at the same the first purifying column 12 through the second air inlet 161
Persistently output discharges ozone to two flue gas runner pipes 16, and ozone through the 3rd air inlet 162 further to entering the second flue gas runner pipe
Flue gas after 16 purified treatments carries out oxidation disinfection and disinfects, and will be purified by exhaust pipe 17 finally by the 3rd gas outlet 163
Flue gas discharge after processing, ozone treatment.
To sum up, the gas cleaning environmental protection equipment of the utility model first embodiment is by setting the first purifying column, second only
Change tower, and ozone output device is provided in the first purifying column, is provided with water mist blowoff, activated carbon mistake in the second purifying column
Filter plate, desulfurizer and nitrogen rejection facility, the first purifying column output ozone can further to purification in the second purifying column at
Flue gas after reason is aoxidized, sterilizing, so as to comprehensively handle dust contained in flue gas, nitrogen oxides, sulphur
The polluters such as compound, organic pollution, bacterium, and the efficiency of gas cleaning processing can be improved, and then promote environmental quality.
Referring to Fig. 3, the utility model second embodiment is on the basis of above-mentioned first embodiment, the flue gas of the present embodiment
Purification environmental-protection equipment further adds following structure feature：
First flue gas runner pipe is provided with the 4th air inlet 21, and the 4th air inlet 21 and the first air inlet are arranged at intervals, the
Four air inlets 21 are connected with another gas outlet of air-suction cover, the flue gas circulation that air-suction cover is drawn quickly is transmitted to first
Flue gas runner pipe.The inner wall of second purifying column is provided with waste residue collection device (not shown) and below nitrogen rejection facility, waste residue
Collection device is for collecting through water mist blowoff, activated carbon filter plate, desulfurizer and nitrogen rejection facility treated residue
Surplus materials, with the service life of lifting means.
The inner wall of second purifying column is additionally provided with electrostatic precipitator (not shown) and below nitrogen rejection facility, the electrostatic
For dust-extraction unit for further drawing remaining substance, the smoke particle of different-grain diameter in flue gas, purification efficiency is high；At other
In embodiment, also electrostatic precipitator can be added in the second purifying column.
The inner wall of second purifying column is additionally provided with lower air-introduced machine 22 and above water mist blowoff, preferably to draw
Purified treatment of the gas-guiding flow through the second purifying column improves purification efficiency.The bottom of fixed frame is provided with fixable multi-axis foot
Wheel 23 so that gas cleaning environmental protection equipment conveniently moving.Gas cleaning environmental protection equipment further includes heat exchange case 24, heat exchange case 24
It is connected with the gas outlet of exhaust pipe, for absorbing the heat in the flue gas after purified treatment.Specifically, in heat exchange case 24
The cavity for accommodating water is provided with, is provided with the flue gas pipe heated to water in cavity, flue gas pipe and exhaust pipe
Gas outlet connects, and further water is heated using heat contained in the flue gas after purified treatment, oxidation processes, realizes
Energy saving and preferably environmental protection.
To sum up, the gas cleaning environmental protection equipment of the utility model second embodiment is by setting the first purifying column, second only
Change tower, and ozone output device is provided in the first purifying column, is provided with water mist blowoff, activated carbon mistake in the second purifying column
Filter plate, desulfurizer and nitrogen rejection facility, the first purifying column output ozone can further to purification in the second purifying column at
Flue gas after reason is aoxidized, sterilizing, so as to comprehensively handle dust contained in flue gas, nitrogen oxides, sulphur
The polluters such as compound, organic pollution, bacterium, and then promote environmental quality；Adding electrostatic precipitator simultaneously can be more preferable
Ground carries out purified treatment to flue gas；By the way that the 4th air inlet, lower air-introduced machine is set further to promote purification efficiency；In addition, pass through
Set heat exchange case, can to treated, flue gas efficiently uses, energy conservation and environmental protection.
In other embodiments, the inner wall of the second purifying column is additionally provided with smoke temperature reducer and sprays dress positioned at water mist
Top is put, smoke temperature reducer is for reducing the temperature of the flue gas of the first purifying column is entered, preferably to protect gas cleaning ring
Protect equipment, smoke temperature reducer concretely spraying ventilating device.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in
Other related technical areas are equally included in the patent within the scope of the utility model.
Claims (9)
1. a kind of gas cleaning environmental protection equipment, which is characterized in that including：
Air-suction cover, the first purifying column, the second purifying column, fixed frame, the first flue gas runner pipe, the second flue gas runner pipe and exhaust
Pipe, wherein, the first flue gas runner pipe is provided with the first air inlet, the first gas outlet, and first air inlet goes out with first
Gas port is respectively arranged at the both ends of the first flue gas runner pipe, the second flue gas runner pipe be provided with the second air inlet, the 3rd into
Gas port and the second gas outlet, second air inlet and the second gas outlet are respectively arranged at the two of the second flue gas runner pipe
End, the 3rd air inlet are arranged between second air inlet and the second gas outlet；
The air-suction cover, the first purifying column, the second purifying column, exhaust pipe are arranged at intervals each other, and first purifying column,
Two purifying columns are arranged on the fixed frame；
The top of the air-suction cover is provided with an at least gas outlet, and the gas outlet of the air-suction cover connects with first air inlet
It connects, the bottom of the air-suction cover is all around provided around the soft curtains of PVC；
The air inlet of second purifying column is connected with first gas outlet, so that the air-suction cover and second purifying column
Connection；
The gas outlet of first purifying column is connected with second air inlet, the gas outlet of second purifying column and described the
Three air inlets connect, and second gas outlet is connected with the air inlet of the exhaust pipe, wherein the exhaust pipe inner wall is provided with
Upper air-introduced machine；
Ozone output device is provided in first purifying column, the inner wall of the second purifying column is disposed with water mist from top to bottom
Blowoff, activated carbon filter plate, desulfurizer and nitrogen rejection facility.
2. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the first flue gas runner pipe is provided with
4th air inlet, the 4th air inlet are arranged at intervals with first air inlet, the 4th air inlet and the air-suction cover
Another gas outlet connection.
3. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the inner wall of second purifying column is set
There is waste residue collection device and below the nitrogen rejection facility.
4. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the inner wall of second purifying column is also set
It is equipped with lower air-introduced machine and above the water mist blowoff.
5. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the inner wall of second purifying column is also set
It is equipped with electrostatic precipitator and below the nitrogen rejection facility.
6. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the inner wall of second purifying column is also set
It is equipped with smoke temperature reducer and above the water mist blowoff.
7. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the bottom of the fixed frame is provided with can
Fixed universal caster wheel.
8. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the air-suction cover, the first purifying column,
Two purifying columns, exhaust pipe are horizontally arranged at interval successively from left to right.
9. gas cleaning environmental protection equipment according to claim 1, which is characterized in that the gas cleaning environmental protection equipment also wraps
Heat exchange case is included, the heat exchange case is connected with the gas outlet of the exhaust pipe, for absorbing the flue gas after purified treatment
In heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721418649.0U CN207385172U (en) | 2017-10-30 | 2017-10-30 | A kind of gas cleaning environmental protection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721418649.0U CN207385172U (en) | 2017-10-30 | 2017-10-30 | A kind of gas cleaning environmental protection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207385172U true CN207385172U (en) | 2018-05-22 |
Family
ID=62327294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721418649.0U Expired - Fee Related CN207385172U (en) | 2017-10-30 | 2017-10-30 | A kind of gas cleaning environmental protection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207385172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193266A (en) * | 2019-07-03 | 2019-09-03 | 陕西理工大学 | A kind of welding shop ventilating system and its application method |
-
2017
- 2017-10-30 CN CN201721418649.0U patent/CN207385172U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193266A (en) * | 2019-07-03 | 2019-09-03 | 陕西理工大学 | A kind of welding shop ventilating system and its application method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180522 Termination date: 20181030 |