CN209210459U - A kind of ozone fluidisation catalysis oxidizing tower - Google Patents
A kind of ozone fluidisation catalysis oxidizing tower Download PDFInfo
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- CN209210459U CN209210459U CN201821578749.4U CN201821578749U CN209210459U CN 209210459 U CN209210459 U CN 209210459U CN 201821578749 U CN201821578749 U CN 201821578749U CN 209210459 U CN209210459 U CN 209210459U
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Abstract
The utility model discloses a kind of ozone to fluidize catalysis oxidizing tower, belong to the sewage treatment field of the high saliferous of industry, its key points of the technical solution are that: including the tower body equipped with cavity being vertically arranged, ozone fluidisation catalytic oxidizing equipment includes the liquid outlet of the diversion pipe being connected to the lower end of tower body and inlet tube and connection on tower body top, a return pipe is communicated at liquid outlet, pass through one between return pipe and diversion pipe outside tower body to be connected to for mixing ozone with the venturi type mixing arrangement of liquid catalyst, ozone ingress pipe is connected on venturi type mixing arrangement；The liquid catalyst pipe for being provided with reflux pump on return pipe, and being connected on return pipe between reflux pump and venturi type mixing arrangement；Manual shutoff valve is equipped with close to one end of venturi type mixing arrangement on diversion pipe.The utility model has the advantages that not needing backwash, remove the installation and maintenance of ozonation aerated disk from, and interior circulation can be formed in oxidizing tower, improves the utilization rate of ozone.
Description
Technical field
The utility model relates to the sewage treatment fields of the high saliferous of industry, and in particular to a kind of ozone fluidisation catalysis oxidation
Tower.
Background technique
Ozone is strong oxidizer, easily biodegradable organics can be converted by the hardly degraded organic substance in water, to improve sewage
Biodegradability, while reducing COD concentration, and remove coloration, sterilization.
For the waste water of the high saliferous of processing industry, in order to improve the high efficiency and oxidation susceptibility of ozone, catalyst adds smelly
Oxygen is the very common technology of modern water treatment technology, and ozone generator is realized generally by aeration plate in the prior art, is exposed
Gas disk is connected with ozone generator, is then passed through ozone by aeration plate, but handling such water quality can have the following problems:
1. ozone and waste water undercompounding, ozone utilization rate are low；
2. generalling use solid catalyst, after running a period of time, catalyst needs backwash, and backwash process is complicated；
3. salt content is bigger due to industrial Halite water, it is easy to tie Hou on aeration plate, aeration plate is blocked, reduces
Ozone provides efficiency.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of ozone to fluidize catalysis oxidation
Tower, its advantage is that: the ozone oxidation of sewage can be realized by not needing backwash and ozonation aerated disk, and improve the benefit of ozone
With rate.
The above-mentioned technical purpose of the utility model has the technical scheme that a kind of ozone fluid catalytic
Oxidizing tower, including the tower body equipped with cavity being vertically arranged, ozone fluidisation catalysis oxidizing tower includes the lower end with the tower body
The diversion pipe being connected to and inlet tube and it is connected to liquid outlet on tower body top, is communicated with a return pipe at liquid outlet, it is described
Pass through one between return pipe and the diversion pipe outside tower body and mixes dress with the venturi type of liquid catalyst for mixing ozone
Connection is set, is connected with ozone ingress pipe on the venturi type mixing arrangement；Reflux pump is provided on the return pipe, and described
The liquid catalyst pipe being connected on return pipe between the reflux pump and the venturi type mixing arrangement；The water conservancy diversion
Manual shutoff valve is equipped with close to one end of the venturi type mixing arrangement on pipe.
Through the above technical solutions, liquid catalyst is added into diversion pipe by liquid catalyst pipe, so that liquid is urged
Agent generates sticking wall flow effect in venturi type mixing arrangement, then with venturi type entered by ozone gas-guide tube mix dress
Ozone mixing in setting forms gyrate mixing wastewater with air liquid in the exit of venturi type mixing arrangement, air-water mixture into
Effect of feeling suffocated is formed at manual shutoff valve after entering diversion pipe, then opens manual shutoff valve, air-water mixture is manual
Abrupt release goes out countless small bubbles after shutoff valve is opened, these bubbles with the intracorporal water of tower entered by inlet tube mix
It closes, realizes the process for carrying out mass transfer from gas phase to liquid phase, realize the ozone oxidation to sewage；Meanwhile by after ozone treatment
Sewage a part venturi type mixing arrangement is flowed by return pipe again, in the process, there is portion in the sewage after reaction
Divide the complete ozone of unreacted to mix again with the liquid catalyst newly imported, increases the utilization rate of ozone.
The utility model is further arranged to: the venturi type mixing arrangement includes Venturi tube, the Venturi tube
Including intermediate tube and the flared tube being connected to the both ends of intermediate tube, the ozone ingress pipe is connected to the intermediate tube；It is described
One end that flared tube is located remotely from each other is connected to the diversion pipe and the return pipe respectively.
Through the above technical solutions, the setting of Venturi tube is so that liquid catalyst generates in venturi type mixing arrangement
Sticking wall flow effect, and ozone and liquid catalyst form gyrate mixing wastewater with air in the exit of venturi type mixing arrangement
Liquid, improves the uniformity of mixing, and the setting of return pipe forms gas so that the liquid in return pipe is again introduced into Venturi tube
Aqueous mixtures improve the utilization rate of ozone.
The utility model is further arranged to: the water conservancy diversion of upper and lower end opening and connection is also vertically arranged in the tower body
Cylinder, the guide shell lower end are bell mouth shape；One end that the inlet tube and the diversion pipe are connect with the tower body is inserted into
Extreme direction extends in the guide shell and on the guide shell；It is additionally provided with above the guide shell for stopping the water conservancy diversion
Cylinder upper section sewage continues up the guiding device of flowing.
Through the above technical solutions, the water that inlet tube enters is the water with certain hydraulic pressure, guide shell inlet internal diameter is big
In export end internal diameter, along with the setting of conically shaped is so that guide shell inside formation Venturi effect, forms a guide shell week
The inside circulation for enclosing sewage, so that ozone is fully utilized, substantially increases ozone utilization rate.
The utility model is further arranged to: being provided with breather valve at the top of the tower body.
Through the above technical solutions, breather valve carries out air pressure balance to oxidizing tower.
The utility model is further arranged to: being connected with vent ozone destructor at the top of the tower body.
Through the above technical solutions, vent ozone destructor handles unreacted ozone, prevent it from entering ambient enviroment.
The utility model is further arranged to: an outlet pipe is communicated at the liquid outlet, the return pipe is also provided in institute
It states at liquid outlet.
Through the above technical solutions, being flowed out by sewage a part after ozone oxidation by outlet pipe in tower body, there are also one
Part along return line flow to venturi type mixing arrangement, can make wherein unreacted ozone formed with liquid catalyst therein
Bubble mixture is simultaneously entered by diversion pipe and carries out sewage treatment in tower body, and the utilization rate of ozone is improved.
The utility model is further arranged to: being corresponded at the liquid outlet in the tower body and is provided with for hindering mixing
The upper end of the effluent weir that liquid is directly flowed out from liquid outlet, the effluent weir is lower than the tower body top.
Through the above technical solutions, stopped with sewage a part after air-water mixture oxidation by guiding device in tower body,
Circulation in being formed, some flow to liquid outlet from effluent weir, and then flows to outlet pipe and return pipe.
In conclusion the utility model has the following beneficial effects:
1, venturi type mixing arrangement is set, when ozone enters, may make that liquid catalyst is mixed in venturi type
Sticking wall flow is formed in box-like device, so that ozone mixes after being sufficiently mixed uniformly with liquid catalyst with sewage；
2, felt suffocated using manual shutoff valve, generate ozone bubbles effect, air-water mixture from valve by outflow when
It waits and generates a large amount of bubble, improve the utilization rate of ozone；
3, it compared to the prior art, does not need to carry out frequent backwash to catalyst, and does not need using aeration plate, in order to avoid
Aeration plate fouling, blocking, reduce investment outlay；
4, the setting of guide shell and inlet tube is so that water flow with pressure forms sticking wall flow band water flow, section after entering guide shell
Can, reduce operating cost；
5, the water inlet of guide shell bottom comes into full contact with the ozone bubbles formed by venturi type mixing arrangement mixes, and improves
Ozone utilization rate reduces ozone dosage；
6, the setting of guide shell, inlet tube and diversion pipe improves smelly so that the sewage in guide shell forms internal circulation
Coefficient of oxygen utilization reduces ozone dosage；
7, return pipe setting so that in tower body the complete ozone of unreacted enter venturi type mixing arrangement again with liquid
Body catalyst is mixed to form gas-liquid mixture, improves the utilization rate of ozone.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that ozone fluidisation catalysis oxidizing tower is embodied in the present embodiment；
Fig. 2 is the flow diagram for carrying out sewage treatment in the present embodiment using the present apparatus.
Appended drawing reference: 1, guide shell；11, cylinder ontology；111, end is exported；12, conically shaped；121, inlet；2, Wen Qiu
In formula mixing arrangement；22, Venturi tube；221, intermediate tube；222, flared tube；2221, liquid catalyst pipe；223, ozone imports
Pipe；3, inlet tube；4, guiding device；5, diversion pipe；51, manual shutoff valve；6, effluent weir；61, liquid outlet；62, outlet pipe；
63, return pipe；64, reflux pump；7, breather valve；71, vent ozone destructor；8, tower body.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.The wherein identical attached drawing of identical components
Label indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "upper", "lower", " bottom
Face " and " top surface " refer to that the direction in attached drawing, word "inner" and "outside" are referred respectively to towards or away from particular elements geometry
The direction at center.
Embodiment
A kind of ozone fluidizes catalysis oxidizing tower, as depicted in figs. 1 and 2, including the tower body 8 with cavity being vertically arranged,
8 lower end of tower body is communicated with inlet tube 3 and diversion pipe 5, and 8 upper end of tower body offers the liquid outlet 61 flowed out for liquid in tower body 8, out
The outlet pipe 62 for being communicated with a return pipe 63 at liquid mouth 61 and being flowed out for sewage after being handled in tower body 8.Return pipe 63 and water conservancy diversion
It is connected to for mixing ozone with the venturi type mixing arrangement 2 of liquid catalyst between pipe 5 by one, venturi type mixing arrangement
2 outside tower body 8.
In the present embodiment, venturi type mixing arrangement 2 include Venturi tube 22, Venturi tube 22 include intermediate tube 221 with
And the flared tube 222 being connected to the both ends of intermediate tube 221, the ozone ingress pipe being passed through for ozone is communicated on intermediate tube 221
223, ozone ingress pipe 223 connects the pneumatic supply for being provided with ozone, and pneumatic supply can be ozone generator or other pneumatic supplies.Expand
One end that mouth pipe 222 is located remotely from each other is connected to diversion pipe 5 and return pipe 63 respectively.Manual shutoff is additionally provided on diversion pipe 5
Valve 51, manual shutoff valve 51 are in diversion pipe 5 close to 2 one end of venturi type mixing arrangement, and return pipe 63 is close to venturi
2 one end of formula mixing arrangement is communicated with the liquid catalyst pipe 2221 entered for liquid catalyst, is additionally provided with back on return pipe 63
Stream pump 64, reflux pump 64 may be provided in the pipe between return pipe 63 and 2221 junction of liquid catalyst pipe and liquid outlet 61
Road.
Ozone is sucked by venturi type by venturi type mixing arrangement 2 when carrying out ozone oxidation to sewage in conjunction with Fig. 2
In mixing arrangement 2, the liquid catalysts such as hydrogen peroxide are added in return pipe 63 by liquid catalyst pipe 2221, when liquid is urged
When agent passes through venturi type mixing arrangement 2 with sewage, due to the setting of flared tube 222, so that being mixed with the dirt of liquid catalyst
Water generates sticking wall flow effect when by the intermediate tube 221 of venturi type mixing arrangement 2, and under the action of the ozone of sucking,
The sewage and ozone for being mixed with liquid catalyst are formed in the exit of the close manual shutoff valve 51 of venturi type mixing arrangement 2
Gyrate mixing wastewater with air liquid, mixing wastewater with air liquid can go out in abrupt release after entering diversion pipe 5 after the opening of manual shutoff valve 51
Countless small bubbles, and enter in guide shell 1 and mixed with the liquid flowed into guide shell 1 by inlet tube 3, it realizes from gas
Opposite liquid phase carries out the process of mass transfer, to realize the ozone oxidation to sewage；At the same time, by the liquid after ozone oxidation
Body a part is again introduced into venturi type mixing arrangement 2 by return pipe 63, in the process, because depositing in liquid after reaction
In the complete ozone of unreacted, this part ozone gone successively to after being mixed again with the liquid catalyst being newly added in tower body 8 into
Row catalysis oxidation increases the utilization rate of ozone.
As shown in Figure 1, in the present embodiment preferred embodiment, can be provided in tower body 8 end opening up and down and
The guide shell 1 of connection, 1 lower end of guide shell are bell mouth shape.More specifically, guide shell 1 includes pillar buoy in the vertical direction
Ontology 11 and conically shaped 12 with 11 lower end integrally connected of cylinder ontology.Export end 111, cone are formed at cylinder 11 upper end opening of ontology
Shape cylinder 12 forms inlet 121 at lower ending opening, and the internal diameter of inlet 121 is greater than the internal diameter at export end 111.Diversion pipe 5 with
Tower body 8 connects one end and protrudes into conically shaped 12 and extend towards the direction close to cylinder ontology 11, and diversion pipe 5 can be from inlet
121 protrude into, and are also possible to protrude into from the intermediate position of conically shaped 12.One end that inlet tube 3 is connect with tower body 8 is from cylinder ontology 11
An ontology 11 is protruded into close to 12 one end of conically shaped, inlet tube 3 protrudes into an ontology 11 to be extended away from the direction of conically shaped 12.
In the present embodiment further preferred embodiment, it is additionally provided with above guide shell 1 for stopping 1 upper portion of guide shell
The guiding device 4 for dividing sewage to continue up flowing, the shape of guiding device 4 is unrestricted, can be one piece of deflector, deflector
It can be horizontally disposed plate, be also possible to the notch plate that edge is higher than intermediate position, it is only necessary to can stop from cylinder
Ontology 11 exports a part of mixed liquor that end 111 is flowed out, so that the part mixed liquor flowed out from export end 111 is outside guide shell 1
Wall flows downward.
In conjunction with Fig. 2, the water that inlet tube 3 enters is the water with certain hydraulic pressure, when inflow in guide shell 1, guide shell 1
Internal water flows up, then under the blocking of guiding device 4, partially with liquid catalyst and the mixed mixed liquor of ozone
It flows downward from 1 outer wall of guide shell, when flowing to 121 inlet of inlet, the sewage on 121 periphery of inlet can enter water conservancy diversion again
The inside of cylinder 1 also will form Venturi effect inside guide shell 1 because 121 internal diameter of inlet is greater than export 111 internal diameter of end, this
Sample meeting sewage forms one in tower body 8 and recycles from guide shell 1 to the inside outside guide shell 1, so that ozone has obtained sufficiently
Utilization, substantially increase ozone utilization rate.
It is L-shaped effluent weir 6 that upper end, which is provided with section, in tower body 8, and effluent weir 6 is arranged in 61 corresponding position of liquid outlet, and goes out
Mill weir 6 is in 4 top of guiding device.Side and 8 inner wall of tower body in 6 horizontal direction of L shape effluent weir is affixed, on vertical direction
There are a certain distance in top and 8 upper surface of tower body, and two sides extension is affixed with 8 inner wall of tower body, so that between effluent weir 6 and tower body 8
Effluent trough is formed, so that the water not stopped by guiding device 4 flows into liquid outlet 61 by effluent weir 6.
8 top of tower body is also connected with breather valve 7 and vent ozone destructor 71, and breather valve 7 carries out air pressure balance, tail to oxidizing tower
Gas destructor 71 handles unreacted ozone, prevents it from entering ambient enviroment.
The course of work: when to sewage ozone catalytic, on return pipe 63, liquid is added by liquid catalyst pipe 2221 and is urged
Ozone is sucked in venturi type mixing arrangement 2 by venturi type mixing arrangement 2, is mixed with the sewage of liquid catalyst by agent
Sticking wall flow effect is generated in the intermediate tube 221 of venturi type mixing arrangement 2, and under the ozonization of sucking, sewage is in text
The exit of formula mixing arrangement 2 forms gyrate mixing wastewater with air liquid in mound, so that liquid catalyst mixes abundant shape with ozone
At air-water mixture；Then, air-water mixture is felt suffocated at manual shutoff valve 51, then opens manual shutoff valve 51, gas
Aqueous mixtures abrupt release after the opening of manual shutoff valve 51 goes out countless small bubbles, enters the inlet of guide shell 1
121 air-water mixture is mixed with the water that inlet tube 3 flows into guide shell 1, is realized from gas phase to liquid phase and is carried out mass transfer
Process；Meanwhile the water that inlet tube 3 enters is the water with certain hydraulic pressure, when inflow in guide shell 1, is driven in guide shell 1
The water in portion flows up, and part and liquid catalyst and the mixed sewage of ozone are then made under the blocking of guiding device 4
It flows downward from 1 top of guide shell, when flowing to 1 inlet of guide shell, 121 inlet, because guide shell 1 inlet, 121 internal diameters are big
Venturi effect is formed inside export 111 internal diameter of end, guide shell 1, so that the sewage on 121 periphery of inlet can be entered and be led again
The inside of flow cartridge 1 will form the inside circulation of 1 surrounding sewage of a guide shell in this way, so that ozone is fully utilized,
Substantially increase ozone utilization rate；Sewage a part in tower body 8 after ozone oxidation is by entering text again by return pipe 63
It mixes, repeats the above process again with the ozone being newly added in formula mixing arrangement 2 in mound；It is come out from 8 top most of tower body
Sewage is flowed out by outlet pipe 62.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (7)
1. a kind of ozone fluidizes catalysis oxidizing tower, including the tower body (8) equipped with cavity being vertically arranged, it is characterized in that: the ozone
Fluid catalytic oxidizing tower includes the diversion pipe (5) being connected to the lower end of the tower body (8), inlet tube (3) and connection in tower
The liquid outlet (61) on body (8) top is communicated with a return pipe (63) at the liquid outlet (61), the return pipe (63) with it is described
In tower body (8) outside by one for mixing the venturi type mixing arrangement (2) of ozone and liquid catalyst even between diversion pipe (5)
It is logical, ozone ingress pipe (223) are connected on the venturi type mixing arrangement (2)；
It is provided with reflux pump (64) on the return pipe (63), and is connected on the return pipe (63) positioned at the reflux pump
(64) the liquid catalyst pipe (2221) between the venturi type mixing arrangement (2)；
Manual shutoff valve (51) are equipped with close to one end of the venturi type mixing arrangement (2) on the diversion pipe (5).
2. a kind of ozone according to claim 1 fluidizes catalysis oxidizing tower, it is characterized in that: the venturi type mixing arrangement
It (2) include Venturi tube (22), the Venturi tube (22) includes intermediate tube (221) and connects with the both ends of intermediate tube (221)
Logical flared tube (222), the ozone ingress pipe (223) are connected to the intermediate tube (221)；
One end that the flared tube (222) is located remotely from each other is connected to the diversion pipe (5) and the return pipe (63) respectively.
3. a kind of ozone according to claim 2 fluidizes catalysis oxidizing tower, it is characterized in that: also vertical in the tower body (8)
It is provided with the guide shell (1) of upper and lower end opening and connection, guide shell (1) lower end is bell mouth shape；
One end that the inlet tube (3) and the diversion pipe (5) are connect with the tower body (8) is inserted into the guide shell (1)
And extreme direction extends on the guide shell (1)；
It is additionally provided with above the guide shell (1) for stopping the guide shell (1) upper section sewage to continue up flowing
Guiding device (4).
4. a kind of ozone according to claim 1 fluidizes catalysis oxidizing tower, it is characterized in that: setting at the top of the tower body (8)
There are breather valve (7).
5. a kind of ozone according to claim 1 fluidizes catalysis oxidizing tower, it is characterized in that: connecting at the top of the tower body (8)
It is connected to vent ozone destructor (71).
6. a kind of ozone according to claim 3 fluidizes catalysis oxidizing tower, it is characterized in that: being connected at the liquid outlet (61)
Have an outlet pipe (62), the return pipe (63) is also provided at the liquid outlet (61).
7. a kind of ozone according to claim 6 fluidizes catalysis oxidizing tower, it is characterized in that: corresponding in the tower body (8)
The effluent weir (6) for hindering mixed liquor directly from liquid outlet (61) outflow, the water outlet are provided at the liquid outlet (61)
The upper end on weir (6) is lower than the tower body (8) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821578749.4U CN209210459U (en) | 2018-09-26 | 2018-09-26 | A kind of ozone fluidisation catalysis oxidizing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821578749.4U CN209210459U (en) | 2018-09-26 | 2018-09-26 | A kind of ozone fluidisation catalysis oxidizing tower |
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| Publication Number | Publication Date |
|---|---|
| CN209210459U true CN209210459U (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821578749.4U Active CN209210459U (en) | 2018-09-26 | 2018-09-26 | A kind of ozone fluidisation catalysis oxidizing tower |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110510728A (en) * | 2019-09-16 | 2019-11-29 | 中冶赛迪技术研究中心有限公司 | Fluidizing type catalytic ozonation reactor |
| CN111777177A (en) * | 2020-05-21 | 2020-10-16 | 河南国威市政工程有限公司 | Integrated micro-power sewage treatment device based on UASB reactor |
| CN112679006A (en) * | 2019-10-17 | 2021-04-20 | 中国石油化工股份有限公司 | Treatment device and treatment method for acrylonitrile-containing wastewater |
| CN113104950A (en) * | 2020-07-15 | 2021-07-13 | 昆山中环科本科技发展有限公司 | External catalyst ozone catalytic reactor and process thereof |
| CN114804428A (en) * | 2022-04-29 | 2022-07-29 | 上海庞科环境技术有限公司 | Oxidation treatment device capable of realizing dynamic operation of catalyst |
| CN115504562A (en) * | 2022-10-20 | 2022-12-23 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Catalytic ozonation reactor |
-
2018
- 2018-09-26 CN CN201821578749.4U patent/CN209210459U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110510728A (en) * | 2019-09-16 | 2019-11-29 | 中冶赛迪技术研究中心有限公司 | Fluidizing type catalytic ozonation reactor |
| CN112679006A (en) * | 2019-10-17 | 2021-04-20 | 中国石油化工股份有限公司 | Treatment device and treatment method for acrylonitrile-containing wastewater |
| CN111777177A (en) * | 2020-05-21 | 2020-10-16 | 河南国威市政工程有限公司 | Integrated micro-power sewage treatment device based on UASB reactor |
| CN113104950A (en) * | 2020-07-15 | 2021-07-13 | 昆山中环科本科技发展有限公司 | External catalyst ozone catalytic reactor and process thereof |
| CN114804428A (en) * | 2022-04-29 | 2022-07-29 | 上海庞科环境技术有限公司 | Oxidation treatment device capable of realizing dynamic operation of catalyst |
| CN114804428B (en) * | 2022-04-29 | 2023-10-17 | 上海庞科环境技术有限公司 | Oxidation treatment device capable of realizing dynamic operation of catalyst |
| CN115504562A (en) * | 2022-10-20 | 2022-12-23 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Catalytic ozonation reactor |
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Address after: 100084 room 301-3008, 3 / F, building 9, yard 1, Nongda South Road, Haidian District, Beijing Patentee after: Beijing Hanqi Environmental Technology Co.,Ltd. Address before: 100084 room 301-3008, 3 / F, building 9, yard 1, Nongda South Road, Haidian District, Beijing Patentee before: BEIJING HANQI ENVIRONMENT TECHNOLOGY CO.,LTD. |
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