CN1161285C - Oxygen dissolving process and equipment for sewage treatment - Google Patents
Oxygen dissolving process and equipment for sewage treatment Download PDFInfo
- Publication number
- CN1161285C CN1161285C CNB001212222A CN00121222A CN1161285C CN 1161285 C CN1161285 C CN 1161285C CN B001212222 A CNB001212222 A CN B001212222A CN 00121222 A CN00121222 A CN 00121222A CN 1161285 C CN1161285 C CN 1161285C
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- CN
- China
- Prior art keywords
- oxygen
- sewage
- water
- mud
- liquid
- 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
- 239000001301 oxygen Substances 0.000 title claims abstract description 90
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 90
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 239000010865 sewage Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title description 6
- 230000008569 process Effects 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000010802 sludge Substances 0.000 claims abstract description 54
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000011978 dissolution method Methods 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims description 38
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 12
- 238000009792 diffusion process Methods 0.000 claims description 11
- 239000011259 mixed solution Substances 0.000 claims description 11
- 230000006641 stabilisation Effects 0.000 claims description 11
- 238000011105 stabilization Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 4
- 238000005842 biochemical reaction Methods 0.000 claims 2
- 239000011229 interlayer Substances 0.000 claims 1
- 239000011499 joint compound Substances 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 238000005273 aeration Methods 0.000 abstract description 5
- 238000010992 reflux Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000010815 organic waste Substances 0.000 description 6
- 230000009257 reactivity Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006213 oxygenation reaction Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The present invention relates to an oxygen dissolution method sewage treatment device which comprises a combined action treating pool, a sewage water inlet and outlet pipe, a water distribution pipe, a sludge discharge pipe, a liquid dissolve-oxygen machine, multiple layers of annular diversion sloping plates, sewage reflux holes, etc. The device breaks through the conventional aeration three-phase reaction separation theory, establishes a flowing suspended activated sludge carrier area, has the advantages of new technology, simple structure, small volume, very small occupation area, low investment and running expense, optimal land utilization, reduced investment, reduced running expense by 40% to 60%, oxygen utilization ratio reaching above 90% and high treatment efficiency, and various discharging indexes of sewage all can reach the state standard of effluent discharge. The present invention is suitable for the treatment of municipal domestic sewage and industrial organic wastewater, and is particularly suitable for the advanced treatment of organic wastewater and sewage.
Description
The present invention relates generally to waste disposal plant, specifically relates to city domestic sewage and industrial organic waste water oxygen dissolution method biochemical treatment apparatus.
At present, city domestic sewage and industrial organic waste water adopt the biochemical treatment of aeration aerating method more both at home and abroad.This method is based on the phase reaction separation theorem, and its technical process and device are made up of preliminary sedimentation tank, aeration tank, second pond, air blast machine room and air, ducted systems and aerating apparatus, sludge reflux pump room and sludge pipe system etc.The technical process relative complex, the treatment unit structures are many, and volume is big, floor space is very big, and investment is big, and the oxygenation time is long, have a large amount of air and oxygen to overflow, oxygen utilization rate is low, below 10% of oxygen weight in general the duty gas, energy consumption is big, the working cost height, and aeration tank water outlet dissolved oxygen is low, sludge quantity is big, and processing efficiency is low, gas, solid, liquid phase reaction and separate be difficult to realize integrated, operation operational management relative complex, processing has peculiar smell near the field, and atmosphere quality is had certain influence.
The objective of the invention is to overcome above-mentioned shortcoming, provide a kind of simple in structure, volume is little, and floor space is few, less investment, and the oxygen utilization rate height, the processing efficiency height, effective, the incorporate pond biochemical sewage treatment device of the oxygen dissolution method of convenient operation and management.
Realize that purpose technical solution of the present invention is as follows:
A kind of oxygen dissolution method waste disposal plant, comprise a sewage comprehensive action processing pond, by the sewage water inlet pipe and water outlet pipe, the water inlet water distributing pipe, overflow groove, shore pipe, liquid oxygen dissolver and water (liquid) is the liquid circulation oxygen dissolver down, the annular of multilayer Different Diameter or side, rectangle flow guiding inclined plate and compositions such as mud return port or pipeline.The liquid oxygen dissolver of described oxygen dissolution method employing liquid air-dissolving apparatus patent of invention exploitation and water (liquid) is liquid circulation oxygen dissolver dissolved oxygen down.Can a large amount of pure oxygens or high-concentration oxygen over-saturation ground is soluble in water, under normal temperature and pressure conditions, its dissolved oxygen in water amount is up to more than the 50mg/L, and has certain activity and suitable stability, oxygen is difficult for discharging from water, can fully satisfy sewage biochemical treatment reactivity time requirement, can to not produce a large amount of air and oxygen overflows liquid level as the aeration oxygenation, the utilization ratio of oxygen can be up to more than 90%, activated sludge concentration is increased, sludge activity improves, in unit volume reaction chamber (district), much more microorganism can occur, sewage disposal is had oxidation and biochemical dual function, can improve sewage treating efficiency greatly, shorten the oxygenation time greatly, reduce the volume size in reaction treatment pond greatly, broken through the traditional gas of sewage disposal, Gu, liquid phase reaction and centrifugation theory have been set up sewage disposal gas, Gu, liquid phase reaction and two new theory that is separated, it is integrated that sewage disposal reaction and precipitate and separate are formed, and realizes a pond sewage treatment structure new form.Its dissolved oxygen amount can be by internal recycle dissolved oxygen flow size and oxygen-supplying amount how much regulate and control to guarantee biochemical oxygen demand and sewage water outlet dissolved oxygen content.Pure oxygen or high-concentration oxygen useful molecules sieve on-site preparation or employing oxygen cylinder and oxygen channel are supplied with.Described comprehensive action is handled the pond by clear water zone (floor), disengaging zone, floor shallow lake (floor), diffusion reaction current stabilization district (floor), mud room and circulate formation such as suspension active sludge carrier district.In circulating suspension active sludge carrier district, be provided with into water water distributing pipe (constituting) by annular or forms such as dendritic perforated tube or tape slit-tube; Mud return line or hole: water (liquid) down the liquid circulation oxygen dissolver (by some planes be staggeredly arranged up and down) and annular flow guiding inclined plate (build up by the annular of multilayer Different Diameter or side, rectangle swash plate, therefrom mind-set is outer downward-sloping, layer and layer overlap joint, and leave spacing and do the flow passage use).Sewage flows from bottom to top by the water inlet water distributing pipe, on the one hand with suspension active sludge carrier hybrid reaction, mud with mud room sucks suspension active sludge carrier district hybrid reaction on the other hand, simultaneously the liquid circulation oxygen dissolver mixed solution that constantly sucks top, suspension active sludge carrier district emits upwards from the bottom behind dissolved oxygen and flows under water, the water inlet water distributing pipe acts synergistically mud suction suspension active sludge carrier district's mixing dissolved oxygen reaction of mud room together, has formed two and circulate mixing dissolved oxygen reactivity function inside and outside suspension active sludge carrier district: the one, and sewage constantly circulates with mud and mixes a kind of internal recycle reactivity function of dissolved oxygen reaction formation in the suspension active sludge carrier district; The 2nd, the mud in the suspension active sludge carrier district and the mud in mud district constantly circulate the dissolved oxygen activation, form a kind of inside and outside mud circulation dissolved oxygen activation function, two Circulation functions have constituted a dissolved oxygen amount height, sludge activity is strong, the concentration height, microbe population is many circulates suspension active sludge carrier district, sewage disposal is played biological and biofiltration double reaction function, circulating the suspension active sludge is a kind of bio-carrier thermopnore, can substitute the bio-carrier effect, its mud quantity of reflux can be regulated and control mud discharge by water inlet water distributing pipe and circulation dissolved oxygen flow, the activated sludge concentration in the active sludge carrier district that guarantees to suspend.Annular or side, rectangle flow guiding inclined plate new texture by the multilayer Different Diameter set up is guided to diffusion reaction current stabilization district from the effusive mud in suspension active sludge carrier district and sewage mixed solution, simultaneously depositing separation area is deposited in mud on the flow guiding inclined plate and is with together and is directed at diffusion reaction current stabilization district, annular flow guiding inclined plate plays the dual flow guide effect to mixed solution and mud.Through diffusion reaction current stabilization district suspension active sludge carrier district is effectively coupled together the incorporate pond biochemical sewage treatment device of formation oxygen dissolution method again with depositing separation area and mud room.
Oxygen dissolution method waste disposal plant of the present invention, an integrated pond oxygen dissolution method waste disposal plant, simple in structure, volume is little, the processing efficiency height, sludge quantity is few, maintenance operation convenient management, less investment, floor space is very little, running cost is low, can save the area, and reduces investment, reduce working cost 40%-60%, sewage after the processing can reach national every sewage drainage standard, is applicable to the processing of city domestic sewage and industrial organic waste water, is specially adapted to the advanced treatment of high-concentration industrial organic waste water and sewage.
Other details of oxygen dissolution method waste disposal plant of the present invention and advantage can be understood by reading the embodiment that hereinafter encyclopaedizes in conjunction with the accompanying drawings.
With reference to accompanying drawing: oxygen dissolution method waste disposal plant synoptic diagram.Effluent stream is crossed grid, take out to rise to enter to flow out behind the settling pit sand setting by sump pump and carry out first section dissolved oxygen through water inlet pipe 1 and liquid oxygen dissolver 2, the sewage that has a large amount of dissolved oxygens enters suspension active sludge carrier district 4 by water inlet water distributing pipe 3 and flows with the mud hybrid reaction and the rising in suspension active sludge carrier district, simultaneously the mud in the mud room 5 is sucked suspension active sludge carrier district by mud refluxing opening or pipeline 6 and carries out hybrid reaction.The following liquid circulation oxygen dissolver 7 of some water (liquid) that is located in the suspension active sludge carrier district carries out second section circulation dissolved oxygen, the mud on oxygen dissolver suction top, suspension active sludge carrier district and sewage mixed solution aspirate the oxygen (oxygen can be supplied with by the molecular sieve preparation) in pure oxygen or the high oxygen concentration tracheae 8 simultaneously, when mixed solution and pure oxygen pass through by the oxygen dissolver of liquid circulation under water of motor 16 drives, just a large amount of oxygen are dissolved in the mixed solution, the mixed solution that has a large amount of dissolved oxygens flows out from bottom, suspension active sludge carrier district, and the mud of mud room is sucked suspension active sludge carrier district with water inlet water distributing pipe synergy, constitute two circulating reaction action functions: one mixes dissolved oxygen reactivity function for the sewage in the suspension active sludge carrier district circulates with mud; Two circulate dissolved oxygen admixture activation reactivity function for the mud in the suspension active sludge carrier district and the mud of the mud room outside the carrier district.Suspension active sludge carrier district is the carrier district that sewage and mud constantly circulate the hybrid reaction effect, sewage disposal is played biological and biofiltration double reaction effect, circulating the suspension active sludge is a kind of bio-carrier thermopnore, active sludge in the suspension active sludge carrier district is through screening, cultivate, instructionization is crossed have the high dissolved oxygen amount of adaptation, active strong, breed soon, microbe population is many, sludge concentration is high, can play rapid oxygenolysis to sewage.Sewage in suspension active sludge carrier district after circulation mixes the dissolved oxygen reactivity be the mixed solution upwelling of sewage and mud through the annular of multilayer Different Diameter or side, rectangle flow guiding inclined plate 9, be guided to diffusion reaction current stabilization district 10, mixed solution enters precipitin reaction disengaging zone 11 behind the diffusion reaction current stabilization, carrying out solid-liquid separation. the clear water upwelling is to clear water zone 12, discharges and utilizes or discharging through overflow groove 13 and rising pipe 14 or through casting aside hydrophone.The downward sedimentation of mud, most of by directly reducing to mud room 5 around the diffusion reaction current stabilization district, part mud is reduced on the annular flow guiding inclined plate 9, is with by annular flow guiding inclined plate with the effusive mixed solution in suspension active sludge carrier district to be directed at diffusion reaction current stabilization district, circulates with this and carries out.The mud part of mud room is back to suspension active sludge carrier district, and a part drains into the sludge thickener processing and utilizing by shore pipe 15.
Oxygen dissolution method waste disposal plant of the present invention, handle the pond by a comprehensive action, the sewage water inlet pipe and water outlet pipe, water distributing pipe, overflow groove, shore pipe, mud return line or hole, the liquid oxygen dissolver and the annular flow guiding inclined plate composition of liquid circulation oxygen dissolver and multilayer Different Diameter under water, set up sewage dissolved oxygen biochemical treatment gas, Gu, the liquid phase reaction is with solid, the new theory of liquid two phase separations, adopted high dissolved oxygen amount, the sludge concentration height, active strong, what microorganism was many circulates suspension active sludge carrier district's novel process and has set up annular flow guiding inclined plate new texture, and the treating pond volume is little, and floor space is little, investment and working cost are few, the processing efficiency height can be saved the area, and reduces investment, reduce working cost 40%-60%, sewage after the processing can reach national every sewage drainage standard, is applicable to the processing of city domestic sewage and industrial organic waste water, is specially adapted to the advanced treatment of the industrial organic waste water and the sewage of high density.
Claims (4)
1. oxygen dissolution method waste disposal plant, comprise a sewage comprehensive action processing pond, the sewage water inlet pipe and water outlet pipe, water distributing pipe, overflow groove, shore pipe, liquid oxygen dissolver and water (liquid) is the liquid circulation oxygen dissolver down, annular flow guiding inclined plate and mud return line or hole are formed, the invention is characterized in that described oxygen dissolution method adopts liquid air-dissolving apparatus patent of invention product---liquid oxygen dissolver and water (liquid) is the circulation oxygen dissolver down, can a large amount of pure oxygens or high-concentration oxygen over-saturation ground is soluble in water, under normal temperature and pressure conditions, the oxygen in water amount can be up to more than the 50mg/L, the liquid oxygen dissolver is contained in to be handled outside the pond on the water inlet pipe, the liquid circulation oxygen dissolver is located at and handles under the mobile suspension active sludge carrier district of pond internal recycle under water, dissolved oxygen in sewage and sewage and mud mixed liquid respectively, described sewage comprehensive action is handled the pond and is made of precipitate and separate and over-saturation dissolved oxygen biochemical reaction effect two portions, the precipitation part is from top to bottom by clear water zone (layer), depositing separation area (layer), diffusion reaction current stabilization district, mud room is formed, over-saturation dissolved oxygen biochemical reaction agency part is formed by circulating suspension active sludge carrier district, be separated by to link to each other by belt flow guiding inclined plate between two portions and constitute incorporate comprehensive action and handle the pond, described water distributing pipe is located at and circulates under the suspension active sludge carrier district, constitute by annular or dendritic perforated tube or bar slit-tube form, described annular flow guiding inclined plate is installed in and circulates in the suspension active sludge carrier district, under the depositing separation area, in the diffusion reaction current stabilization district, by multilayer Different Diameter annular or side, the rectangle swash plate builds up, therefrom mind-set is outer downward-sloping, layer and layer overlap joint, interlayer leaves flow passage, be guided to diffusion reaction current stabilization district simultaneously with circulating the suspension active sludge carrier district mud that effusive mixed solution and depositing separation area settle down that rises, play the dual flow guide effect.
2. according to the described oxygen dissolution method waste disposal plant of claim 1, it is characterized in that described dissolved oxygen divides two sections to carry out, installing liquid oxygen dissolver carries out first section dissolved oxygen in sewage on the sewage water inlet pipe of one section dissolved oxygen outside treating pond, circulate suspension active sludge carrier district lower flat and be staggeredly arranged up and down at treating pond again water (liquid) liquid circulation oxygen dissolver down is installed, carry out second section circulation dissolved oxygen in the suspension active sludge intermixture, dissolved oxygen amount in its sewage and the mud mixed liquid is regulated and control by two sections solution floies and oxygen-supplying amount, guarantee biochemical oxygen demand and sewage water outlet dissolved oxygen content, two sections dissolved oxygens have oxidation and biochemical double reaction effect.
3. according to claim 1 or 2 described oxygen dissolution method waste disposal plants, it is characterized in that described dissolved oxygen is pure oxygen or the high-concentration oxygen that adopts, pure oxygen or high-concentration oxygen useful molecules are sieved on-site preparation or are supplied with oxygen cylinder and oxygen channel.
4. according to the described oxygen dissolution method waste disposal plant of claim 1, it is characterized in that describedly circulating that the bottom is provided with into water water distributing pipe in the suspended sludge carrier district, mud return line or hole, liquid circulation oxygen dissolver under water, top is provided with the annular flow guiding inclined plate of multilayer Different Diameter, is formed in sewage and mud in the suspension active sludge carrier district and constantly circulates the mud and the mud in the mud district that mix in dissolved oxygen and the suspension active sludge carrier district and constantly circulate dissolved oxygen activation dual function function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001212222A CN1161285C (en) | 2000-08-08 | 2000-08-08 | Oxygen dissolving process and equipment for sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001212222A CN1161285C (en) | 2000-08-08 | 2000-08-08 | Oxygen dissolving process and equipment for sewage treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1277156A CN1277156A (en) | 2000-12-20 |
| CN1161285C true CN1161285C (en) | 2004-08-11 |
Family
ID=4588658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001212222A Expired - Fee Related CN1161285C (en) | 2000-08-08 | 2000-08-08 | Oxygen dissolving process and equipment for sewage treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1161285C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269881B (en) * | 2008-04-23 | 2010-06-02 | 浙江德安新技术发展有限公司 | Inner loop liquefaction biological reaction apparatus for wastewater treatment |
| JP6013376B2 (en) * | 2011-02-28 | 2016-10-25 | ダコ・デンマーク・エー／エス | Two-phase immiscible system for pretreatment of embedded biological samples |
| PL2570550T3 (en) * | 2011-09-15 | 2016-03-31 | Linde Ag | Oxygen treatment of water and pulp from paper or cardboard production |
| CN102502951A (en) * | 2011-11-03 | 2012-06-20 | 安徽国祯环保节能科技股份有限公司 | Auxiliary sludge discharging method and device for aeration basin in oxidation ditch process |
| CN103508557B (en) * | 2012-06-19 | 2015-10-21 | 绍兴深水环保设备有限公司 | Active sludge bed reaction treatment method and device |
| CN103432950A (en) * | 2013-08-07 | 2013-12-11 | 戴启彬 | Stirring pot |
| CN105668779B (en) * | 2016-04-06 | 2019-05-21 | 厦门百仕洁环保科技有限公司 | A kind of circulating oxygenation biochemical device |
| CN111423056B (en) * | 2020-03-31 | 2021-12-21 | 江苏医药职业学院 | Aeration device for sewage treatment |
-
2000
- 2000-08-08 CN CNB001212222A patent/CN1161285C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1277156A (en) | 2000-12-20 |
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Owner name: BEIJING ENERGY EFFICIENCY ENVIRONMENTAL ENGINEERIN Free format text: FORMER OWNER: YANG ZHUANFANG Effective date: 20090911 |
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Effective date of registration: 20090911 Address after: Beijing City, Xizhimen North Street No. 47 Building No. 1 room 123 times myhouse Patentee after: Beijing Nengxiao Environmental Engineering Co., Ltd. Address before: 12-2-13, eight, Xinjie street, Xinjie street, Beijing, Xicheng District Patentee before: Yang Chuanfang |
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