CN203648389U - Combined device for treating high-temperature and high-concentration organic waste gas by catalytic oxidation - Google Patents
Combined device for treating high-temperature and high-concentration organic waste gas by catalytic oxidation Download PDFInfo
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- CN203648389U CN203648389U CN201420002034.XU CN201420002034U CN203648389U CN 203648389 U CN203648389 U CN 203648389U CN 201420002034 U CN201420002034 U CN 201420002034U CN 203648389 U CN203648389 U CN 203648389U
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- Prior art keywords
- catalytic oxidation
- chamber
- waste gas
- spray column
- airduct
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 50
- 230000003647 oxidation Effects 0.000 title claims abstract description 49
- 230000003197 catalytic Effects 0.000 title claims abstract description 29
- 239000007789 gas Substances 0.000 title claims abstract description 26
- 239000010815 organic waste Substances 0.000 title abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims abstract description 24
- 239000002912 waste gas Substances 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims description 47
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000003610 charcoal Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 10
- 210000003660 Reticulum Anatomy 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N TiO Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 7
- 239000000969 carrier Substances 0.000 claims description 7
- 230000001808 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 241001466460 Alveolata Species 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 12
- 238000005507 spraying Methods 0.000 abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 6
- 235000010215 titanium dioxide Nutrition 0.000 abstract 3
- 238000000034 method Methods 0.000 description 9
- 241000264877 Hippospongia communis Species 0.000 description 8
- 238000007146 photocatalysis Methods 0.000 description 7
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229920002521 Macromolecule Polymers 0.000 description 1
- 102000014961 Protein Precursors Human genes 0.000 description 1
- 108010078762 Protein Precursors Proteins 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001413 cellular Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000004059 degradation Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- OZAIFHULBGXAKX-UHFFFAOYSA-N precursor Substances N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
Abstract
The utility model discloses a combined device for treating high-temperature and high-concentration organic waste gas by catalytic oxidation. The combined device is composed of a spraying tower, a TiO2 photo-catalytic oxidation chamber and an active carbon adsorption chamber, wherein the bottom of the spraying tower is connected with a waste gas inlet pipeline by a first-grade gas inlet air pipe; the top of the spraying tower is connected with a first-grade gas outlet air pipe; the bottom of the TiO2 photo-catalytic oxidation chamber is connected with a second-grade gas inlet air pipe and the top of the TiO2 photo-catalytic oxidation chamber is connected with a second-grade gas outlet air pipe; the second-grade gas inlet air pipe is connected with the first-grade gas outlet air pipe by a pipeline; the active carbon adsorption chamber is connected with the second-grade gas outlet air pipe by a pipeline at the top and is connected with a centrifugal fan by fan soft connection; the centrifugal fan is connected with an electric generator; the centrifugal fan and the electric generator are fixedly arranged on a shock-absorption base. The device disclosed by the utility model is used for treating high-temperature, high-concentration and large-molecular weight volatile waste gas; the treatment efficiency of the volatile waste gas can be effectively improved; the device is small in investment, low in operation cost, small in secondary pollution, simple in operation and efficient in operation.
Description
Technical field
The utility model relates to a kind of TiO
2the combination unit of Treatment by Photocatalysis Oxidation high-temperature high concentration organic exhaust gas, being specifically related to one is by spray column, TiO
2the combined treatment device that photocatalytic oxidation device and absorbent charcoal adsorber are coupled to form.
Background technology
Volatile organic contaminant (VOCs) is one of important as precursors thing forming PM2.5, is also one of factor forming haze pollution.VOCs overall control is next step important channel of improving air pollution index of the city.Processing volatile organic contaminant adopts conventionally by abundant combustion method, catalytic oxidation, absorption process and absorption method etc.Common combustion method and catalytic oxidation power consumption are high, and absorption process and absorption rule are because the replacement cost of absorption or sorbing material is too high, all enterprise are caused to economic pressures, have limited the improvement process of volatile organic waste gas.
TiO
2photocatalysis oxidation technique is the new waste gas improvement technology occurring in recent years, aspect waste gas pollution control and treatment, there is unique advantage, as high in treatment effeciency, operating cost is low, secondary pollution is few etc., but the domestic improvement that is mainly used in the less molecular weight low concentration foul gas such as the sulfide hydrogens such as destructor plant, Sewage Disposal, slaughterhouse, ammonia, formaldehyde, the Engineering Projects of large for some waste gas generations, to contain the HMW of benzene homologues, difficult degradation high-temperature high concentration volatile organic waste gas is comparatively rare, TiO
2the advantage of Treatment by Photocatalysis Oxidation waste gas fails fully to promote.
Summary of the invention
In order to overcome the deficiency of processing high temperature, high concentration, the existence of macromolecule volatility waste gas in prior art, the purpose of this utility model is to provide a kind of TiO
2the combination unit of Treatment by Photocatalysis Oxidation high-temperature high concentration organic exhaust gas, by spray column, TiO
2the combined treatment device that photocatalytic oxidation device and absorbent charcoal adsorber are coupled to form can effectively improve the treatment effeciency of volatility waste gas, and plant investment is few, operating cost is low, secondary pollution is few, simple to operate, operation is efficient.
Based on above-mentioned opinion, the utility model is achieved in that
A combination unit for catalytic oxidation treatment high-temperature high concentration organic exhaust gas, is characterized in that, comprise have to waste gas spray, the spray column of cooling, oil removing effect, the TiO of catalysis, oxidation gaseous effluent
2photochemical catalytic oxidation chamber and there is adsorbing charcoal absorption chamber; Described spray column bottom is connected with gas inlet pipeline by one-level air inlet airduct, and top and the one-level airduct of giving vent to anger is connected; Described TiO
2photochemical catalytic oxidation chamber bottom is connected with secondary air inlet airduct, and top and the secondary airduct of giving vent to anger is connected; Secondary air inlet airduct is connected by pipeline and the one-level airduct of giving vent to anger; The pipeline of described charcoal absorption chamber by its top and the secondary airduct of giving vent to anger is connected, and charcoal absorption chamber is flexible coupling and is connected with centrifugal blower by the blower fan of outer wall, and centrifugal blower is connected with generator, and centrifugal blower and generating seat in the plane are fixed in damping base.
Above-mentioned spray column inside is provided with three layers of eddy flow pedal, and every layer of eddy flow pedal is provided with 2 shower nozzles, and shower nozzle inside has the shower nozzle water pipe that right-angled intersection distributes.
The bottom of above-mentioned spray column is provided with a waste water accumulated cistern, has placed the water pump of extracting trickle effect at the bottom of the pond of cistern; Spray column bottom outside has water valve, for cistern more renews water.
Above-mentioned spray column inner tip has the temperature element of monitoring EGT after spray, and spray column outer wall has the circular manhole of detection, maintenance internals.
Above-mentioned TiO
2the body inside, chamber of photochemical catalytic oxidation chamber has the nano-TiO with the effect of oxidation Decomposition waste gas of vertical parallel arrangement
2and honeycomb ceramic carrier and UV fluorescent tube; On the outer wall of bottom, there is the square manhole of observing UV lamp operation situation.
The inside of above-mentioned charcoal absorption chamber has the Alveolate activated carbon capable of absorption waste gas effect, and outside has maintenance, changes the access door of active carbon.
At the bottom of the pond of above-mentioned cistern, be 5 ° of slope-types.
The utility model adopts spray, TiO
2photochemical catalytic oxidation, charcoal absorption coupling device carry out exhaust-gas treatment, waste gas is by being arranged at the blower negative pressure traction of technique end, enter spray column by gas inlet pipeline, spray column inside is provided with water pump, shower nozzle and cistern, and the waste gas after spraying cooling oil removing enters photochemical catalytic oxidation chamber body; Organic exhaust gas is by the nano-TiO being carried on honeycomb ceramic packing
2catalytic action, irradiates oxidation reaction occurs through UV fluorescent tube, then remains qualified discharge after the waste gas that further absorbs complete oxidation not through active carbon layer; Whole process is controlled automatically by PLC.The utility model is for the processing of high-temperature high concentration volatile organic waste gas, strengthened greatly high-temperature high concentration volatile organic waste gas treatment effeciency, saved floor space and operating cost, and overall process produces secondary pollution hardly.
Brief description of the drawings
Fig. 1: the utility model overall structure schematic diagram;
Fig. 2: the utility model spray column internal structure schematic diagram;
Fig. 3: the utility model TiO
2photochemical catalytic oxidation chamber interior structural representation;
Fig. 4: the utility model charcoal absorption chamber interior structural representation;
Wherein, 1, spray column, 2, shower nozzle, 3, eddy flow pedal, 4, temperature element, 5, one-level air inlet airduct, 6, cistern, 7, water pump, 8, water valve, 9, gas inlet pipeline, 10, circular manhole, 11, the one-level airduct of giving vent to anger, 12, shower nozzle water pipe, 13, pipeline, 14, nano-TiO
2and honeycomb ceramic carrier, 15, UV fluorescent tube, 16, square manhole, 17, TiO
2photochemical catalytic oxidation chamber, 18, secondary air inlet airduct, 19, the secondary airduct of giving vent to anger, 20, charcoal absorption chamber, 21, cellular activated carbon, 22, access door, 23, blower fan is flexible coupling, 24, centrifugal blower, 25, generator, 26, damping base.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments to the utility model TiO
2the combination unit of Treatment by Photocatalysis Oxidation high-temperature high concentration organic exhaust gas is described in further details.
As shown in Figure 1, a kind of TiO
2the combination unit of Treatment by Photocatalysis Oxidation high-temperature high concentration organic exhaust gas, by spray column 1, TiO
2photochemical catalytic oxidation chamber 17 and charcoal absorption chamber 20 form.Spray column 1 bottom is connected with gas inlet pipeline 9, and top and the one-level airduct 11 of giving vent to anger is connected; TiO
2the bottom of photochemical catalytic oxidation chamber 17 is connected with secondary air inlet airduct 18, and top and the secondary airduct 19 of giving vent to anger is connected; Secondary air inlet airduct 18 is connected by pipeline 13 and the one-level airduct 11 of giving vent to anger; The pipeline 13 of charcoal absorption chamber 20 by its top and the secondary airduct 19 of giving vent to anger is connected, charcoal absorption chamber is flexible coupling and 23 is connected with centrifugal blower 24 by the blower fan of outer wall, centrifugal blower 24 is connected with generator 25, and centrifugal blower and generating seat in the plane are fixed in damping base 26.
As depicted in figs. 1 and 2, spray column 1 is inner is connected with gas inlet pipeline 9 by one-level air inlet airduct 5; Spray column inside is provided with three layers of eddy flow pedal 3, and every layer of eddy flow pedal 3 is provided with 2 shower nozzles 2, and shower nozzle inside has the shower nozzle water pipe 12 that right-angled intersection distributes, and can carry out omnibearing spray to waste gas; The bottom of spray column is provided with cistern 6, at the bottom of the pond of cistern 6 place water pump 7, water pump 7 is realized spray to gas to spray column top by shower nozzle 2 by water extracting, waste water accumulate with wastewater disposal basin 6 in, monthly cistern is changed to water, can more renew water by the water valve of spray column 8; And at the bottom of the pond of cistern, adopt 5 ° of slope designs, and while changing water, be both conducive to complete draining, can not hinder again water inlet.Spray column 1 inner tip has the temperature element 4 of monitoring EGT after spray, and spray column 1 outer wall has the circular manhole 10 of detection, maintenance internals.
As shown in figures 1 and 3, TiO
2the body inside, chamber of photochemical catalytic oxidation chamber 17 has the nano-TiO of vertical parallel arrangement
2and honeycomb ceramic carrier 14 and UV fluorescent tube 15; On the outer wall of bottom, there is the square manhole 16 of observing UV fluorescent tube 15 ruuning situations.
As shown in Figure 1 and Figure 4, the inside of charcoal absorption chamber 20 has the Alveolate activated carbon capable 21 of absorption waste gas effect, and outside has maintenance, changes the access door 22 of active carbon.
When the work of the utility model device:
(1) from workshop by gas inlet pipeline 9 and one-level air inlet airduct 5, waste gas is incorporated into spray column 1, waste gas enters from spray column 1 bottom, water pump 7 is pumped to spray column 1 top by water and sprays through shower nozzle 2, utilize collision, guide functions at the inner eddy flow that forms of spray column 1, increase the contact area of aqueous water and gas molecule in space, reach the effect of cooling oil removing; Waste water after spray washing continues to lodge in cistern 6 and recycles, and the water in cistern is monthly changed once; Spray column top is provided with temperature element 4, for monitoring the EGT after spray.
(2) waste gas after spray washing enters core apparatus TiO
2in photochemical catalytic oxidation chamber body 17, catalyst nano TiO
2adopt ceramic honey comb to form nano-TiO as carrier
2and honeycomb ceramic carrier 14, by TiO
2utilize chemical reaction to be attached to uniformly the surface, space of ceramic honey comb, UV fluorescent tube 15 is fixed on TiO
2on the wallboard of photochemical catalytic oxidation chamber body 17, can pass through access door 16 examination and maintenance fluorescent tubes, nano-TiO
2and honeycomb ceramic carrier 14 is placed between UV fluorescent tube 15, under the irradiation of UV fluorescent tube 15, catalyst generation photolysis, produces and has in a large number the free radical of strong oxidation, thereby bond energy cracking, the oxidation of organic exhaust gas molecule are converted into micromolecular CO
2, H
2the gases such as O.Preferably, the power density of every fluorescent tube is about 15W/CM, and UV fluorescent tube 15 is by ballast external control, ensures luminous normally, and whole device housings adopts SUS304 to make, and can prevent that air-flow is producing the damage to equipment in light-catalyzed reaction process.
(3) gas after photochemical catalytic oxidation is in entering active carbon adsorption chamber 20, and active carbon adsorption layer is preferably fixed bed form, and Alveolate activated carbon capable 21 is piled up on adsorbent bed, enters by access door 22, changes activated carbon simple and convenient.
(4) centrifugal blower 24 is placed on equipment least significant end, forms negative pressure, and vibration damping pedestal 26 is joined in blower fan bottom, can reduce the destruction of fan vibration to airduct, processes gas up to standard and can introduce chimney by airduct and discharge.
The utility model TiO
2the combination unit of Treatment by Photocatalysis Oxidation high-temperature high concentration organic exhaust gas, by spray column, TiO
2the combined treatment device that photocatalytic oxidation device and absorbent charcoal adsorber are coupled to form can effectively improve the treatment effeciency of volatility waste gas, and plant investment is few, operating cost is low, secondary pollution is few, simple to operate, operation is efficient.
Above-mentioned example just, for explanation technical conceive of the present utility model and technical characterstic, can not limit protection domain of the present utility model with this.All equivalent transformations doing according to essence of the present utility model or modification, within all should being encompassed in protection domain of the present utility model.
Claims (7)
1. a combination unit for catalytic oxidation treatment high-temperature high concentration organic exhaust gas, is characterized in that, comprise have to waste gas spray, the spray column (1) of cooling, oil removing effect, the TiO of catalysis, oxidation gaseous effluent
2photochemical catalytic oxidation chamber (17) and there is adsorbing charcoal absorption chamber (20); Described spray column (1) bottom is connected with gas inlet pipeline (9) by one-level air inlet airduct (5), and top and the one-level airduct (11) of giving vent to anger is connected; Described TiO
2photochemical catalytic oxidation chamber (17) bottom is connected with secondary air inlet airduct (18), and top and the secondary airduct (19) of giving vent to anger is connected; Secondary air inlet airduct (18) is connected by pipeline (13) and the one-level airduct (11) of giving vent to anger; The pipeline (13) of described charcoal absorption chamber (20) by its top and the secondary airduct (19) of giving vent to anger is connected, charcoal absorption chamber (20) by the blower fan of outer wall be flexible coupling (23) be connected with centrifugal blower (24), centrifugal blower (24) is connected with generator (25), and centrifugal blower (24) and generating seat in the plane (25) are fixed in damping base (26).
2. the combination unit of catalytic oxidation treatment high-temperature high concentration organic exhaust gas according to claim 1, it is characterized in that, described spray column (1) inside is provided with three layers of eddy flow pedal (3), every layer of eddy flow pedal (3) is provided with 2 shower nozzles (2), and shower nozzle (2) inside has the shower nozzle water pipe (12) that right-angled intersection distributes.
3. the combination unit of catalytic oxidation treatment high-temperature high concentration organic exhaust gas according to claim 1, it is characterized in that, the bottom of described spray column (1) is provided with a waste water accumulated cistern (6), has placed the water pump (7) of extracting trickle effect at the bottom of the pond of cistern (6); Spray column (1) bottom outside has water valve (8), for cistern (6) more renews water.
4. the combination unit of catalytic oxidation treatment high-temperature high concentration organic exhaust gas according to claim 1, it is characterized in that, described spray column (1) inner tip has the temperature element (4) of monitoring EGT after spray, and spray column (1) outer wall has the circular manhole (10) of detection, maintenance internals.
5. the combination unit of catalytic oxidation treatment high-temperature high concentration organic exhaust gas according to claim 1, is characterized in that, described TiO
2the body inside, chamber of photochemical catalytic oxidation chamber (17) has the nano-TiO with the effect of oxidation Decomposition waste gas of vertical parallel arrangement
2and honeycomb ceramic carrier (14) and UV fluorescent tube (15); On the outer wall of bottom, there is the square manhole (16) of observing UV fluorescent tube (15) ruuning situation.
6. the combination unit of catalytic oxidation treatment high-temperature high concentration organic exhaust gas according to claim 1, it is characterized in that, the inside of described charcoal absorption chamber (20) has the Alveolate activated carbon capable (21) of absorption waste gas effect, and outside has maintenance, changes the access door (22) of active carbon.
7. the combination unit of catalytic oxidation treatment high-temperature high concentration organic exhaust gas according to claim 3, is characterized in that, at the bottom of the pond of described cistern (6), is 5 ° of slope-types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420002034.XU CN203648389U (en) | 2014-01-03 | 2014-01-03 | Combined device for treating high-temperature and high-concentration organic waste gas by catalytic oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420002034.XU CN203648389U (en) | 2014-01-03 | 2014-01-03 | Combined device for treating high-temperature and high-concentration organic waste gas by catalytic oxidation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203648389U true CN203648389U (en) | 2014-06-18 |
Family
ID=50914832
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420002034.XU Expired - Fee Related CN203648389U (en) | 2014-01-03 | 2014-01-03 | Combined device for treating high-temperature and high-concentration organic waste gas by catalytic oxidation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203648389U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984639A (en) * | 2015-07-10 | 2015-10-21 | 常州市龙润机械有限公司 | Chemical waste gas purification device and purification method |
| CN105709536A (en) * | 2016-04-28 | 2016-06-29 | 重庆阳正环保科技有限公司 | Process for treating waste gases generated during lost foam casting |
| CN106492594A (en) * | 2017-01-05 | 2017-03-15 | 中山市恒雅环保工程有限公司 | A kind of VOCs exhaust treatment systems and its processing method |
| CN107961665A (en) * | 2017-11-30 | 2018-04-27 | 彭素珍 | A kind of waste gas treatment equipment in smart city |
| CN111359433A (en) * | 2020-04-17 | 2020-07-03 | 漳州市昱琪丰金属结构件有限公司 | Integrative treatment facility of high concentration high temperature waste gas |
-
2014
- 2014-01-03 CN CN201420002034.XU patent/CN203648389U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984639A (en) * | 2015-07-10 | 2015-10-21 | 常州市龙润机械有限公司 | Chemical waste gas purification device and purification method |
| CN105709536A (en) * | 2016-04-28 | 2016-06-29 | 重庆阳正环保科技有限公司 | Process for treating waste gases generated during lost foam casting |
| CN106492594A (en) * | 2017-01-05 | 2017-03-15 | 中山市恒雅环保工程有限公司 | A kind of VOCs exhaust treatment systems and its processing method |
| CN107961665A (en) * | 2017-11-30 | 2018-04-27 | 彭素珍 | A kind of waste gas treatment equipment in smart city |
| CN111359433A (en) * | 2020-04-17 | 2020-07-03 | 漳州市昱琪丰金属结构件有限公司 | Integrative treatment facility of high concentration high temperature waste gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20140618 Termination date: 20210103 |