CN105132053B - Biogas utilization equipment - Google Patents
Biogas utilization equipment Download PDFInfo
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- CN105132053B CN105132053B CN201510548111.0A CN201510548111A CN105132053B CN 105132053 B CN105132053 B CN 105132053B CN 201510548111 A CN201510548111 A CN 201510548111A CN 105132053 B CN105132053 B CN 105132053B
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- purification
- desulfurizing
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- purifying tank
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Abstract
Biogas utilization equipment, including desulfurizing and purifying tank, surge tank, booster fan and gas electricity generator, desulfurizing and purifying tank are divided into purification dewatering station and the desulfurization chamber of bottom on top by median septum；Purify and multiple purification pipes vertically bent are provided with dewatering station, purify pipe both ends open and through median septum and lower clapboard, the both sides of purification dewatering station are respectively equipped with air inlet and air outlet, and air inlet connects cooling blower by pipeline, and air outlet is connected with exhaust duct；The top of desulfurizing and purifying tank is provided with the desulfurizing and purifying tank below methane outlet, purification dewatering station and is provided with biogas import；The cylinder of multiple radial directions is provided with purification pipe, its upper end for stretching out median septum is provided with air jet pipe, the upper end sealing of air jet pipe, its tube wall is provided with puff prot；Air jet pipe periphery is filled with solid desulfurating agent.It has preferable dewatered clean and hydrogen sulfide removal efficiency to biogas, it is to avoid solid desulfurating agent is blocked, and so as to improve biogas quality, improves generating efficiency, it is ensured that the safe handling of equipment.
Description
Technical field
The present invention relates to the natural pond for being used to generate electricity after a kind of methane utilization device, more particularly to a kind of biogas dehydration desulfurizing and purifying
Gas utilizes equipment.
Background technology
Biogas is a kind of extraordinary fuel gas, and its combustion heat value is about 5000~5500kcal/m3, its mainly by
60%~70% methane, 25%~40% carbon dioxide and a small amount of nitrogen sulfide and hydrogen sulfide composition.China has extensively
Wealthy biogas produces the modes such as source of the gas, including sewage disposal, biofermentation and biomass energy d and produced, to the biogas of generation
Utilized, can reach and save energy consumption, reduce the purpose of operating cost.Meanwhile, Methane in Mine Air content reaches finite concentration
Can have toxicity, H contained therein2S gases are even more to have severe toxicity.Biogas is with air with 1: (8.6~20.8) (volume ratio) is mixed
During conjunction, in case of naked light can set off an explosion.Therefore, methane recovery is utilized and had great significance.
In the utilization system of existing sewage disposal and biomass ferment Biogas, such as Chinese patent (application number：
200720025359.X, authorized announcement date 2008-09-24) disclose a kind of " industry biogas combustion utilization equipment ", including separation
The biogas pipeline 6 of collection is connected to the entrance of desulfurizing tower 2, the outlet of desulfurizing tower 2 pipeline 6 and filtering by switch electromagnetic valve 1
The entrance of device 3 connects, and the outlet of filter 3 is connected with pipeline 6 with the entrance of booster fan 5, the pipe before the entrance of booster fan 5
Pressure sensor 4 is housed, the outlet pipeline 6 of booster fan 5 sequentially passes through spark arrester, non-return valve, butterfly valve, bellows pressure on road 6
Power table, pressure-reducing valve, shut-off valve are connected to the biogas entrance of gas burner 12, and the air intake of gas burner 12 picks blower fan 10
Air outlet slit, on the biogas entrance preceding pipeline of gas burner 12 be equipped with pressure sensor 9, the output of pressure sensor 9
The input of frequency converter 13 is terminated, its output end picks the signal input part of blower fan 10.The equipment is to apply brewageing, food etc.
It is high with biogas utilization rate in industry, invest the characteristics of small, security is good.But hydrogen sulfide gas removal and impurity are purified
Effect is poor, using easily desulfurizing agent gap is blocked because of moisture, impurity contained in biogas etc. after a period of time, increases
The power consumption of booster fan；Separated impurity is attached to desulfurizing agent surface in addition, does not also allow after desulfurizing agent is oxidized reduction
It is easily separated, influence the secondary utilization rate of desulfurizing agent；Secondly also because after desulfurizing agent gap is blocked so that desulfurizing agent and hydrogen sulfide
The contact surface of gas diminishes, and reduces desulfuration efficiency, thus easily causes follow-up utilization part, including blower fan, pipeline etc.
Corrosion, adds operation and maintenance cost.
The content of the invention
The present invention provides a kind of biogas utilization equipment, for solve biogas desulfurization in the prior art and dewatered clean effect compared with
The defect of difference.
In order to realize the purpose of the present invention, using following technical scheme：
Biogas utilization equipment, including desulfurizing and purifying tank, surge tank, booster fan and gas electricity generator, the desulfurizing and purifying
Tank is divided into purification dewatering station and desulfurization chamber by median septum, and purification dewatering station is located at the lower section of desulfurization chamber, purification dewatering station bottom
Portion is provided with lower clapboard, and median septum and lower clapboard are sealed with desulfurizing and purifying top tank structure to be fixed；Provided with many in the purification dewatering station
The individual purification pipe vertically bent, purifies pipe both ends open and through median septum and lower clapboard, the both sides of the purification dewatering station are divided
Not She You air inlet and air outlet, air inlet is connected with cooling blower by pipeline, and air outlet is connected with exhaust duct；The desulfurization
The top of purification pot is provided with methane outlet, and methane outlet is connected with desulfurization chamber, the desulfurizing and purifying tank below the purification dewatering station
On be provided with biogas import, biogas import is connected with purification mouth lower end；The cylinder of multiple radial directions is provided with the purification pipe, it stretches out
The upper end of median septum is provided with air jet pipe, and the upper end sealing of the air jet pipe, its tube wall is provided with the puff prot of multiple bar shapeds；It is described
Solid desulfurating agent is filled between the inwall of air jet pipe periphery and desulfurizing and purifying tank, the height of the solid desulfurating agent filling is more than
The puff prot position of air jet pipe highest point.
In order to further realize the purpose of the present invention, following technical scheme can also be used：
The purification pipe constitutes S-shaped structure by the epimere and hypomere of arc, and the bending radius of epimere is less than the bending of hypomere
Radius.The puff prot uniformly offers multirow in air jet pipe periphery vertically, and the puff prot stagger arrangement of adjacent lines is set.It is described solid
Body desulfurizing agent is the strip particle thing that fiber and croci are made.The horizontal cross-section of the puff prot is with flaring out
Sector.Water seal is provided with front side of the biogas import, the bottom of the desulfurizing and purifying tank is provided with discharge outlet, the outside of discharge outlet
Provided with automatic steam trap.The desulfurizing and purifying tank is provided with manhole, manhole positioned at the side wall of desulfurization chamber and installs manhole cover, the people
Sealing gasket is provided between port lid and desulfurizing and purifying tank.
Beneficial effects of the present invention：
1st, provided with purification dewatering station and desulfurization chamber in desulfurizing and purifying tank of the invention, provided with bending in purification dewatering station
Purification pipe, purification inside pipe wall is provided with the cylinder of multiple radial directions.When biogas passes through purification pipe from the biogas import of desulfurizing and purifying tank,
Air inlet, air outlet are respectively equipped with the both sides of purification dewatering station, marsh gas flow in purification pipe can be reduced using cooling blower
Temperature, by the moisture contained in biogas separate out；Meanwhile, using the cylinder set in purification pipe, make marsh gas flow in process
When, the impurity contained in air-flow and water can further be removed, and as the inwall of purification pipe bending is discharged to bottom, pass through
Automatic or manual mode is drained into outside desulfurizing and purifying tank.Biogas enters air jet pipe after purification dehydration from purification pipe upper end, then
Reacted from puff prot outflow and solid desulfurating agent, because now, water and impurity in marsh gas flow are preferably removed in advance
Go, thus when reacting removal hydrogen sulfide gas with solid desulfurating agent, will not occur solid desulfurating agent humidity accumulation so as to by between
The problem of gap is blocked, and then preferable hydrogen sulfide removal efficiency is can guarantee that, it is also convenient for solid desulfurating agent failure and carries out redox
Recycled afterwards, meanwhile, it is free from foreign meter in solid desulfurating agent, it is convenient to reclaim the sulphur simple substance separated out during desulfurizing agent reduction.
2nd, puff prot is set to bar shaped, and its horizontal cross-section has sector structure, and the puff prot of bar shaped flows out jet in biogas
When pipe and solid desulfurating agent reaction, bigger contact surface can be realized, in addition using sector structure, can blow away and get lodged in puff prot
The solid desulfurating agent particle in outside, prevents puff prot to be blocked, and reduces biogas flow velocity, it is ensured that marsh gas flow passes through solid desulfurating agent
When have the longer absorbing reaction time.
3rd, purification pipe using bending structure, it is ensured that impurity and water flow downward row from tube wall under gravity
Remove, in same space, path of the biogas by purification pipe can also be extended, the effect of biogas dewatered clean is improved.Biogas
Walk in purification pipe, cooling wind is flowed outside pipe, and upper spacer, lower clapboard are sealed with desulfurizing and purifying inside pipe wall and fixed, can be preferable
Guarantee be less prone to leakage, cause biogas and air stream, bring hidden danger.
4th, present invention process is simple, easy for operation, improves the effect of biogas dewatered clean, advantageously ensures that preferably
Hydrogen sulfide removal efficiency, so as to protect the safe handling of system and the quality of part.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of desulfurizing and purifying tank described in Fig. 1.
Fig. 3 is Fig. 2 A-A to sectional view.
Fig. 4 is the amplification schematic cross-section that pipe is purified described in Fig. 2.
Fig. 5 is Fig. 4 B-B to sectional view (cylinder not shown in figure).
Fig. 6 is Fig. 5 C-C to sectional view.
Reference：1- desulfurizing and purifying tanks, 2- surge tanks, 3- booster fans, 4- gas electricity generators, 5- median septums, 6- is net
Change dewatering station, 7- desulfurization chambers, 8- lower clapboards, 9- purification pipes, 10- air inlets, 11- air outlets, 12- cooling blowers, 13- biogas goes out
Mouthful, 14- biogas imports, 15- cylinders, 16- air jet pipes, 17- puff prots, 18- water seals.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
As shown in figures 1 to 6, a kind of biogas utilization equipment of the present embodiment, including desulfurizing and purifying tank 1, surge tank 2, booster fan
3 and gas electricity generator 4, the desulfurizing and purifying tank 1 is divided into purification dewatering station 6 and desulfurization chamber 7 by median septum 5, purifies dewatering station 6
It is located at the lower section of desulfurization chamber 7, the bottom of purification dewatering station 6 is provided with lower clapboard 8, median septum 5 and lower clapboard 8 are and desulfurizing and purifying
The inner wall sealing of tank 1 is fixed；Multiple purification pipes 9 vertically bent are provided with the purification dewatering station 6, purification pipe 9 both ends open is simultaneously
Through median septum 5 and lower clapboard 8, the both sides of the purification dewatering station 6 are respectively equipped with air inlet 10 and air outlet 11, air inlet 10
Cooling blower 12 is connected with by pipeline, air outlet 11 is connected with exhaust duct；The top of the desulfurizing and purifying tank 1 goes out provided with biogas
Mouth 13, methane outlet 13 is connected with desulfurization chamber 7, and biogas import is provided with the desulfurizing and purifying tank 1 of the lower section of purification dewatering station 6
14, biogas import 14 is connected with purification mouth lower end；The cylinder 15 of multiple radial directions is provided with the purification pipe 9, it stretches out median septum 5
Upper end air jet pipe 16 is installed, the upper end sealing of the air jet pipe 16, its tube wall is provided with the puff prot 17 of multiple bar shapeds；It is described
Solid desulfurating agent is filled between the inwall of air jet pipe periphery and desulfurizing and purifying tank 1, the height of the solid desulfurating agent filling is big
In the position of puff prot 17 of highest point on air jet pipe 16.
Specifically, a kind of biogas utilization equipment disclosed in the present embodiment, biogas is from sewage disposal or biomass ferment etc.
After aerogenesis apparatus is drawn, desulfurizing and purifying tank 1 is first passed around, the steady pressure of surge tank 2 and flow velocity are then sequentially passed through again, then pass through
Booster fan 3, the burner for bringing up to suitable gaseous-pressure feeding gas electricity generator 4 is burnt, and heat energy is converted into non-machine
Tool can external output power.Provided with purification dewatering station 6 and desulfurization chamber 7 in desulfurizing and purifying tank 1, it is provided with purification dewatering station 6
The purification pipe 9 of bending, purification pipe 9 inwall is provided with the cylinder 15 of multiple radial directions.When biogas is from the biogas import 14 of desulfurizing and purifying tank 1
By purifying during pipe 9, air inlet 10, air outlet 11 are respectively equipped with the both sides of purification dewatering station 6, can be with using cooling blower 12
The temperature of marsh gas flow, the moisture contained in biogas is separated out in reduction purification pipe 9, meanwhile, utilize what is set in purification pipe 9
Cylinder 15, makes marsh gas flow when passing through, and can further remove the impurity and water that contain in biogas, and with purification pipe 9
The inwall of bending is rejected to the bottom of desulfurizing and purifying tank 1, is drained into by automatic or manual mode outside tank body.Biogas is by purification
Enter air jet pipe 16 from purification pipe 9 upper end after dehydration, then reacted from the outflow of puff prot 17 and solid desulfurating agent, because this
When, water and impurity in marsh gas flow are preferably removed in advance, thus are removing hydrogen sulfide gas with solid desulfurating agent reaction
When, will not occur the accumulation of solid desulfurating agent humidity the problem of gap is blocked, and then to can guarantee that preferable hydrogen sulfide removal
Efficiency, is also convenient for being recycled after solid desulfurating agent failure carries out redox, meanwhile, it is free from foreign meter in solid desulfurating agent,
It is convenient to reclaim the sulphur simple substance separated out during solid desulfurating agent reduction.In addition, in order to prevent biogas from puff prot flow out when, without solid
The desulfurization of body desulfurizing agent and directly from methane outlet draw, the height that solid desulfurating agent is filled be more than air jet pipe highest point jet
The puff prot position of the top is again smaller than the height that solid desulfurating agent is filled on mouthful position, i.e. air jet pipe, therefore, do not have without
The biogas for crossing desulfurization is used by follow-up equipment.In actual use, air jet pipe can all be buried to the solid desulfurating agent for overlaying on filling
In, and keep the top on air jet pipe puff prot position and solid desulfurating agent filling difference in height between 300-500mm compared with
To be suitable.Biogas is walked to purify in pipe 9, cooling wind flowed outside pipe, upper spacer, lower clapboard 8 with the inner wall sealing of desulfurizing and purifying tank 9
It is fixed, it can preferably ensure to occur without leakage, it is to avoid biogas and air stream bring hidden danger.
Wherein, desulfurizing and purifying tank 1, the size of surge tank 2 can be configured according to the speed of aerogenesis, and surge tank 2 is set
Put and be mainly used in steady pressure, be easy to gas electricity generator 4 to control, because larger biogas storage device is not provided with, thus this hair
Bright security is good, can save larger investment.When the volume size of usual surge tank 2 can guarantee that the stabilization of gas electricity generator 4 is used
5-10 minute flows, with ensure the anti-biogas output wave zone of system come unstability.
As shown in Fig. 2 the purification pipe 9 of the present embodiment constitutes S-shaped structure by the epimere and hypomere of arc, epimere it is curved
Bilge radius are less than the bending radius of hypomere.Purify pipe 9 using bending structure, it is ensured that impurity and water under gravity from
Tube wall, which flows downward, to be discharged, in same space, can also extend path of the biogas by purification pipe 9, is improved biogas and is taken off
The effect of Water warfare.Further manufacture craft and step in order to simplify purification pipe 9, epimere and lower end are used by purification pipe 9
S-shaped structure is spliced into, the bending radius of hypomere is set larger, resistance is small, more smooth when can make the outflow of impurity and water.
As shown in figure 5, the puff prot 17 of the present embodiment uniformly offers multirow vertically in air jet pipe periphery, it is adjacent
The capable stagger arrangement of puff prot 17 is set.Puff prot 17 is provided with multiple on air jet pipe 16, the treatment effeciency of biogas can be improved, in natural pond
In the case that gas disposal amount is certain, the width of puff prot 17 can be set smaller, with the bigger biogas of acquisition and solid desulfurization
The contact area of agent.
The replacing of solid desulfurating agent and oxygen reduction is passed through for convenience, the present embodiment is located in the desulfurizing and purifying tank 1
The side wall of desulfurization chamber 7, which is provided with manhole, manhole, installs manhole cover, and sealing gasket is provided between manhole cover and desulfurizing and purifying tank 1.Its
In, used solid desulfurating agent forms the particulate matter of strip using fiber and croci after compacting, and its diameter is excellent
When being selected between 10-15mm, the specific surface area of solid desulfurating agent can be increased；In addition, being mixed using fiber and croci
Compacting so that solid desulfurating agent has preferable open-work rate, and with preferable hardness, is difficult to be rolled over to be broken into powder, it is ensured that Gu
Removal efficiency of the body desulfurizing agent to hydrogen sulfide gas.
As shown in Figure 5, Figure 6, the horizontal cross-section of puff prot 17 described in the present embodiment is the sector with flaring out.Jet
Mouth 17 is set to bar shaped, and its horizontal cross-section has sector structure, and puff prot 17 flows out air jet pipe in biogas and solid desulfurating agent is anti-
At once, bigger contact surface can be realized, in addition using sector structure, the solid desulfurization for getting lodged in the outside of puff prot 17 can be blown away
Agent particle, prevent puff prot 17 be blocked, while biogas flow velocity can be reduced, it is ensured that marsh gas flow pass through solid desulfurating agent when have compared with
The long absorbing reaction time.
In order to ensure that using for desulfurizing and purifying tank 1 is safe, it is to avoid between biogas utilization equipment and biogas generation apparatus not
Potential safety hazard influences each other, as shown in Figure 1 and Figure 2, and the present embodiment is provided with water seal 18 in the front side of biogas import 14, described
The bottom of desulfurizing and purifying tank 1 is provided with discharge outlet, and the outside of discharge outlet is provided with automatic steam trap.Can timing using automatic steam trap
The water and impurity of the bottom separation of desulfurizing and purifying tank 1 are excluded, is reduced labor intensity, it is to avoid when accumulation is excessive, by marsh gas flow again
Carry.
The technology contents of the not detailed description of the present invention are known technology.
Claims (7)
1. biogas utilization equipment, including desulfurizing and purifying tank, surge tank, booster fan and gas electricity generator, it is characterised in that described
Desulfurizing and purifying tank is divided into purification dewatering station and desulfurization chamber by median septum, and purification dewatering station is located at the lower section of desulfurization chamber, the purification
Dewatering station bottom is provided with lower clapboard, and median septum and lower clapboard are sealed with desulfurizing and purifying top tank structure to be fixed；The purification dewatering station
It is interior to be provided with multiple purification pipes vertically bent, purify pipe both ends open and pass through median septum and lower clapboard, the purification dewatering station
Both sides be respectively equipped with air inlet and air outlet, air inlet is connected with cooling blower by pipeline, and air outlet is connected with exhaust duct；
The top of the desulfurizing and purifying tank is provided with methane outlet, and methane outlet is connected with desulfurization chamber, de- below the purification dewatering station
Biogas import is provided with sulphur purification pot, biogas import is connected with purification pipe lower end；The post of multiple radial directions is provided with the purification pipe
Body, the upper end that purification pipe stretches out median septum is provided with air jet pipe, and the upper end sealing of the air jet pipe, its tube wall is provided with multiple bar shapeds
Puff prot；Solid desulfurating agent, the solid desulfurating agent are filled between the air jet pipe periphery and the inwall of desulfurizing and purifying tank
The height of filling is more than the puff prot position of air jet pipe highest point.
2. biogas utilization equipment according to claim 1, it is characterised in that the purification pipe by arc epimere and hypomere
S-shaped structure is constituted, the bending radius of epimere is less than the bending radius of hypomere.
3. biogas utilization equipment according to claim 1, it is characterised in that the puff prot in air jet pipe periphery vertically
Uniform to offer multirow, the puff prot stagger arrangement of adjacent lines is set.
4. biogas utilization equipment according to claim 1, it is characterised in that the solid desulfurating agent is fiber and iron oxide
The strip particle thing that powder is made.
5. biogas utilization equipment according to claim 1, it is characterised in that the horizontal cross-section of the puff prot be with to
The sector of outer enlarging.
6. biogas utilization equipment according to claim 1, it is characterised in that be provided with water seal on front side of the biogas import,
The bottom of the desulfurizing and purifying tank is provided with discharge outlet, and the outside of discharge outlet is provided with automatic steam trap.
7. biogas utilization equipment according to claim 1, it is characterised in that the desulfurizing and purifying tank is located at the side of desulfurization chamber
Wall, which is provided with manhole, manhole, installs manhole cover, and sealing gasket is provided between manhole cover and the desulfurizing and purifying tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510548111.0A CN105132053B (en) | 2015-08-31 | 2015-08-31 | Biogas utilization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510548111.0A CN105132053B (en) | 2015-08-31 | 2015-08-31 | Biogas utilization equipment |
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| Publication Number | Publication Date |
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| CN105132053A CN105132053A (en) | 2015-12-09 |
| CN105132053B true CN105132053B (en) | 2017-10-13 |
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| CN201510548111.0A Active CN105132053B (en) | 2015-08-31 | 2015-08-31 | Biogas utilization equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114591769B (en) * | 2020-12-04 | 2023-11-10 | 中国石油化工股份有限公司 | Membrane system structure for removing hydrogen sulfide from natural gas |
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| CN201313027Y (en) * | 2008-10-28 | 2009-09-23 | 青岛瑞德新能源工程技术有限公司 | A hood-type desulfurization tank |
| CN201473508U (en) * | 2009-09-04 | 2010-05-19 | 东莞市康达机电工程有限公司 | Assembling type marsh gas processor |
| CN202157058U (en) * | 2011-07-22 | 2012-03-07 | 北京市环科环境工程设计所 | Integrated firedamp purifying device |
| CN102641662A (en) * | 2012-04-20 | 2012-08-22 | 湖北蓝焰生态能源有限公司 | Desulfuration water filtering tower |
| CN103409192A (en) * | 2013-08-28 | 2013-11-27 | 黑龙江省科学院科技孵化中心 | Device for condensing methane in rotating manner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CZ306061B6 (en) * | 2010-05-03 | 2016-07-20 | Výzkumný ústav zemědělské techniky, v.v.i. | Apparatus for modification of biogas to fuel of natural gas type |
| KR101407559B1 (en) * | 2013-12-02 | 2014-06-16 | 주식회사 바우만 | Dryer Desulfurization Apparatus using Deliquescent Dehydration Unit |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201313027Y (en) * | 2008-10-28 | 2009-09-23 | 青岛瑞德新能源工程技术有限公司 | A hood-type desulfurization tank |
| CN201473508U (en) * | 2009-09-04 | 2010-05-19 | 东莞市康达机电工程有限公司 | Assembling type marsh gas processor |
| CN202157058U (en) * | 2011-07-22 | 2012-03-07 | 北京市环科环境工程设计所 | Integrated firedamp purifying device |
| CN102641662A (en) * | 2012-04-20 | 2012-08-22 | 湖北蓝焰生态能源有限公司 | Desulfuration water filtering tower |
| CN103409192A (en) * | 2013-08-28 | 2013-11-27 | 黑龙江省科学院科技孵化中心 | Device for condensing methane in rotating manner |
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| CN105132053A (en) | 2015-12-09 |
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Effective date of registration: 20170908 Address after: 224005, No. 285, West Ring Road, Yancheng City, Jiangsu Applicant after: Steam-Power Equipment Manufacture Co., Ltd., Jiangsu Address before: Office building No. 2 Guangzhou Road, unit 266300 in Jiaozhou City, Shandong province Qingdao City No. 167 Tong Garden District 5 layer Applicant before: QINGDAO HAIZHIYUAN INTELLIGENT TECHNOLOGY CO., LTD. |
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