CN106673303A - Multi-effect and energy-saving bio-contact oxidation process - Google Patents
Multi-effect and energy-saving bio-contact oxidation process Download PDFInfo
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- CN106673303A CN106673303A CN201611182131.1A CN201611182131A CN106673303A CN 106673303 A CN106673303 A CN 106673303A CN 201611182131 A CN201611182131 A CN 201611182131A CN 106673303 A CN106673303 A CN 106673303A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/109—Characterized by the shape
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a multi-effect and energy-saving bio-contact oxidation process. The process adopts n stages of biological contact oxidation ponds, an active carbon adsorption pond, a dephosphorization pond and a precipitation pond are arranged in the multi-effect and energy-saving bio-contact oxidation process; the stages of biological contact oxidation ponds are successively connected with the active carbon desorption pond, the dephosphorization pond and the precipitation pond through a manner of feeding water from the top and discharging water from the bottom; granular active carbon is adopted in the active carbon adsorption pond; phosphorus in the sewage is further removed by using a coagulation way in the dephosphorization pond; the precipitation pond is used for precipitating and sterilizing by using an oblique tube precipitation manner or an advection sedimentation manner; chlorine tablets are fed through a water outlet of the precipitation pond; an aeration tube or an aeration disc is mounted at the bottom of each of biological contact oxidation ponds, the dephosphorization pond and the active carbon adsorption pond so as to ensure that sludge-water mixture of the system is in a dispersed state; under the precondition that the water quality is stable and meets the standard, the sewage treatment process is capable of improving the pollutant removal effect and improving dephosphorizing and precipitating efficiency; moreover, the sewage treatment process has multiple effects such as the effect of sterilizing and the like.
Description
Technical field
The present invention relates to technical field of sewage, is a kind of Biological Contact Oxidation Process of efficient energy-saving.
Background technology
Water environment pollution is increasingly severe, and the sanitary sewage in villages and small towns is unprocessed to be directly discharged to natural environment, exacerbates water
Matter deteriorates, and the sewage disposal in villages and small towns is extremely urgent.Village disperses, and villages and small towns sewage does not have the pumping equipment of unified planning, and sewage is very
Difficult centralized collection, sewage cannot realize always effective process.Biological Contact Oxidation Process has higher volumetric loading because of it, no
Sludge reflux is needed, without sludge bulking, operational management is simple, is used widely in the sewage disposal process of villages and small towns.
Traditional Biological Contact Oxidation Process is a kind of aerobic biological film method technique, and filler, portion are provided with contact-oxidation pool
Microorganism is divided to be grown in filler surface with biomembranous form set, part microorganism is cotton-shaped suspension growth in water.It is biological
Solids content is high, and with higher volumetric loading, the fluctuation to water quantity and quality has stronger adaptability.
Traditional Biological Contact Oxidation Process phosphor-removing effect is poor, and water outlet total number of bacteria is frequently exceeded；When suspension in raw water
Thing content is relatively low, and the carrier of biomembrane set is less, causes biomembrane proportion less, easily causes demoulding, and biofilm is unstable.It is de-
The biomembrane and floc sludge for falling is poor in sedimentation in secondary sedimentation tank effect, is easily caused out aqueous suspension exceeded.In order to solve above-mentioned asking
Topic, the Biological Contact Oxidation Process for researching and developing novel multi-effect is extremely urgent.
The content of the invention
The technical problem to be solved is to provide a kind of Biological Contact Oxidation Process of efficient energy-saving.
To solve above-mentioned technical problem, the technical scheme is that：
A kind of Biological Contact Oxidation Process of efficient energy-saving, arranges n levels biological contact oxidation pond and activated carbon adsorption tank,
Dephosphorization pond and sedimentation tank, by biological contact oxidation ponds at different levels and activated carbon adsorption tank, dephosphorization pond and sedimentation tank using it is enterprising under water
The mode of water outlet is sequentially connected, wherein, granular active carbon is adopted in the activated carbon adsorption tank, coagulation mode is adopted in dephosphorization pond
The phosphorus in sewage is further removed, sedimentation tank carries out precipitation sterilization using tube settling or advection sedimentation mode, and heavy
The outlet in shallow lake pond adds chlorine tablets and is sterilized；Biological contact oxidation pond, dephosphorization pond and activated carbon adsorption tank bottom are respectively mounted exposure
Trachea or aeration plate are in dispersity with the mud mixture for guaranteeing system.
Preferably, the Biological Contact Oxidation Process of above-mentioned efficient energy-saving, n >=3 in the n levels biological contact oxidation pond, respectively
The filler of the level biological contact oxidation pond adopts spherical compounded mix (commercial), filler diameter 8-15cm, volumetric loading to exist
1.0-3.0kgBOD5/m3·d。
Preferably, the Biological Contact Oxidation Process of above-mentioned efficient energy-saving, the aeration rate of the biological contact oxidation pond according to
The ratio of aeration rate and flow of inlet water, gas-water ratio is 5-15:1.
Preferably, the Biological Contact Oxidation Process of above-mentioned efficient energy-saving, the current of the biological contact oxidation pond are plug-flow
Form.
Preferably, the Biological Contact Oxidation Process of above-mentioned efficient energy-saving, the granule adopted in the activated carbon adsorption tank is lived
Property charcoal dosage be 3-10mg/L.
Preferably, the Biological Contact Oxidation Process of above-mentioned efficient energy-saving, the dephosphorization pond adopts chemical dephosphorization, when water inlet phosphorus
When content is higher than 4mg/L, start dephosphorization system, the coagulant that the dephosphorization system is adopted is aluminium polychlorid or iron chloride,
Flocculation aid adopts polyacrylamide, by the dosing pump dosing coagulant and flocculation aid, coagulant and flocculation aid in dephosphorization bottom of pond portion
Add simultaneously, the abundant coagulation of coagulant is kept by aeration, the coagulant chemical feeding quantity of dephosphorization system is 5-25mg/L, is helped
Solidifying agent chemical feeding quantity is 0.1-1mg/L.
Preferably, the Biological Contact Oxidation Process of above-mentioned efficient energy-saving, the sedimentation tank is using tube settling or advection
Coprecipitation mode carries out precipitation sterilization, and specifically, treating capacity adopts advection sedimentation, treating capacity to adopt more than 5 ton days less than 5 ton days
Use tube settling.
Preferably, the Biological Contact Oxidation Process of above-mentioned efficient energy-saving, the aeration tube or aeration plate are micro-pore aeration
Disk or micropore aeration pipe.
The invention has the beneficial effects as follows：
The Biological Contact Oxidation Process of above-mentioned efficient energy-saving, on the premise of guaranteeing that stable effluent quality is up to standard, strengthens dirty
Dye thing removal effect, improves dephosphorization and deposition efficiency, while having the multiple effects such as sterilization, power-equipment less investment runs energy
Consumption is low, has reached the purpose of efficient energy-saving, is with a wide range of applications.
Description of the drawings
Fig. 1 is the operating process schematic diagram of the Biological Contact Oxidation Process of efficient energy-saving of the present invention.In figure：
1：Inlet pipeline 2：One-level biological contact oxidation pond 3：Two stage biological contact-oxidation pool
4：Three-level biological contact oxidation pond 5：Activated carbon adsorption tank 6：Dephosphorization pond 7：Sedimentation tank
8：Chlorine tablets 9：Discharge pipe line 10：Tolerance effusion meter 11：Aerated conduit valve
12：Aerator 13：Dosing pump 14：Fluid flowmeter 15：Dosing pipe valve
16：Mud valve 17：Mud line 18：N level biological contact oxidation ponds
Specific embodiment
Technical scheme of the present invention is further described with reference to specific embodiment.
Embodiment 1
A kind of Biological Contact Oxidation Process of efficient energy-saving, as shown in figure 1, using n levels biological contact oxidation pond and work
Property charcoal adsorption tank, dephosphorization pond and sedimentation tank carry out sewage disposal, wherein, one-level biological contact oxidation pond 2, two stage biological contact oxygen
Change pond 3, three-level biological contact oxidation pond 4, n levels biological contact oxidation pond 18 and activated carbon adsorption tank 5, dephosphorization pond 6 and precipitation
Pond 7 is sequentially connected by the way of enterprising water outlet under water, and the water inlet above one-level biological contact oxidation pond is connected with inlet pipeline
1, the outlet above sedimentation tank is connected with discharge pipe line 9, adds chlorine tablets 8 in the water outlet and is sterilized, using chlorine tablets not only
It is good to draining bactericidal effect, while the breeding for inhibiting sedimentation tank microorganism increases, effluent quality is improved, reduce being suspended in water outlet
Thing content, and reagent cost is low, the biological contact oxidation ponds at different levels, dephosphorization pond and activated carbon adsorption tank bottom are respectively mounted tolerance
Effusion meter 10, aerated conduit valve 11 and microporous aeration disc or micropore aeration pipe, are connected with aerator 12 on aerated conduit, with
The mud mixture for guaranteeing system is in dispersity；The dephosphorization bottom of pond portion is sequentially connected with fluid flowmeter 14, dosing pipe
Valve 15 and dosing pump 13, the dephosphorization pond adopts chemical dephosphorization, when phosphorus content of intaking is higher than 4mg/L, starts dephosphorization system,
The coagulant that the dephosphorization system is adopted is aluminium polychlorid (can also be iron chloride), and flocculation aid adopts polyacrylamide, leads to
The dosing pump dosing coagulant and flocculation aid in dephosphorization bottom of pond portion are crossed, coagulant and flocculation aid are added simultaneously, keep mixed by aeration
The abundant coagulation of solidifying agent, the coagulant chemical feeding quantity of dephosphorization system is 5-25mg/L, and flocculation aid chemical feeding quantity is 0.1-1mg/L；
The sedimentation tank bottom is provided with mud line 17, is provided with mud valve 16 on the mud line, sedimentation tank using tube settling or
Person's advection sedimentation, deposition efficiency is high；Wherein,
N >=3 in the n levels biological contact oxidation pond, can be configured according to actual needs, the biological contact oxidations at different levels
Change the filler in pond using commercial spherical compounded mix, filler diameter 8-15cm, volumetric loading is in 1.0-3.0kgBOD5/m3D,
Biological contact oxidation pond not only increases sludge concentration using the Ball-type packing for suspending, and also has conventional fluidization bed and biological concurrently
The advantage of both oxidizing process, the current of the biological contact oxidation pond are plug-flow form, and aeration rate is according to aeration rate and feed water flow
The ratio of amount, gas-water ratio is 5-15:1, by the castering action of the aeration in Aeration tank and current carrier is made in fluidized state,
Further the biomembrane of the activated sludge of formation suspension growth and apposition growth, gives full play to both attachment phase and suspended phase biology
Superiority, is allowed to maximize favourable factors and minimize unfavourable ones, and is complementary to one another, and floating stuffing can be efficiently gone in eliminating water with the frequent multiple-contact of sewage
Pollutant；
Granular active carbon is adopted in the activated carbon adsorption tank, dosage is 3-10mg/L, and granular active carbon on the one hand can
Pollutant are carried out further to decompose, is removed as filler, to improve sludge concentration, another aspect activated carbon can adsorb
The Organic substance of water small molecular improves treatment effect；
Coagulation mode is adopted further to remove the phosphorus in sewage in dephosphorization pond, sedimentation tank is heavy using tube settling or advection
Shallow lake mode carries out precipitation sterilization, and specifically, treating capacity adopts advection sedimentation, treating capacity to adopt more than 5 ton days less than 5 ton days
Tube settling, higher for phosphorus content in raw water, biological phosphate-eliminating can not be met when requiring, start chemical dephosphorization, chemical dephosphorization phase
It is high to biological phosphate-eliminating dephosphorization efficiency, it is easy to operate, it is easy to control.
By above-mentioned activated carbon adsorption tank, dephosphorization pond in combination with Biological Contact Oxidation Process, substantially increase little in water
The removal efficiency of molecular organic especially phosphorus.
Dephosphorization system replaces coagulation stirring using micro- aeration, reduces equipment investment, can reduce by 10% operation power consumption, can
Implementation strengthens.
Application examples
Tianjin North Star somewhere sanitary sewage is processed, the ton per day of the water yield 5 is processed.
Process raw water quality as shown in table 1.
The raw water quality of table 1
With reference to embodiment 1, using the multiple-effect technique of 3 grades of catalytic oxidation+activated carbon adsorption+dephosphorization+precipitations, raw water is from water inlet
Pipeline 1, sequentially enters 1 grade of 2,2 grades of biological contact oxidation pond, 3,3 grades of biological contact oxidation pond biological contact oxidation pond 4, contacts oxygen
Change spherical suspending filling material of the pond using diameter 10mm, fully degraded removes the pollutant such as larger molecular organicses, ammonia nitrogen, biological
The gas-water ratio of oxidation pond is 10:1.Subsequently into activated carbon adsorption tank 5, granular active carbon dosage 10mg/L, through activated carbon
Absorption and microbial degradation further remove small organic molecule.Dephosphorization pond 6 is entered afterwards, and dephosphorization pond 6 is added by dosing pump
Ferric chloride coagulant, chemical feeding quantity is calculated according to 5mg/L.Using aeration rate 0.5m3/ h realizes that coagulation is stirred, coagulation suspension overflow
Into sedimentation tank；In sedimentation tank 7, using after advection sedimentation, phosphorous flco precipitation, supernatant is sterilized sedimentation tank by chlorine tablets 8
Afterwards, draining is discharged or reuse through discharge pipe line 9.Biological contact oxidation ponds at different levels, activated carbon adsorption tank and dephosphorization system bottom
The aerating pipelines in portion are respectively mounted gas flowmeter 10 and other pipelines valve 11, and the gas piping of each structures bottom is by drum
The gas main branch that blower fan 12 is connected goes out.Dephosphorization system bottom is provided with fluid flowmeter 14, dosing pipe valve 15
And dosing pump 13, control the chemical feeding quantity of the coagulant during process operation.Sedimentation tank bottom is provided with the He of mud line 17
Spoil disposal valve carries out a spoil disposal in 16,1 month.
Proved by testing, the effect that this technique is achieved in sewage disposal pilot scale, producing water water quality is shown in Table 2, water outlet
Reach CODCr<30mg/L, TN<10mg/L, TP<0.3mg/L, NH3-N<The processing requirement of 1.5mg/L.
The producing water water quality of table 2
The above-mentioned detailed description carried out to a kind of Biological Contact Oxidation Process of efficient energy-saving with reference to embodiment, is explanation
Property rather than it is determinate, several embodiments can be included according to limited scope, therefore without departing from of the invention overall
Changing and modifications under design, should belong within protection scope of the present invention.
Claims (8)
1. a kind of Biological Contact Oxidation Process of efficient energy-saving, it is characterised in that：N levels biological contact oxidation pond and activity are set
Charcoal adsorption tank, dephosphorization pond and sedimentation tank, biological contact oxidation ponds at different levels and activated carbon adsorption tank, dephosphorization pond and sedimentation tank are adopted
The mode of enterprising water outlet under water is sequentially connected, wherein, adopt granular active carbon, dephosphorization to adopt in pond in the activated carbon adsorption tank
Coagulation mode further removes the phosphorus in sewage, and sedimentation tank carries out precipitation sterilization using tube settling or advection sedimentation mode,
And add chlorine tablets in the outlet of sedimentation tank to be sterilized；Biological contact oxidation pond, dephosphorization pond and activated carbon adsorption tank bottom
The mud mixture that aeration tube or aeration plate are respectively mounted to guarantee system is in dispersity.
2. the Biological Contact Oxidation Process of efficient energy-saving according to claim 1, it is characterised in that：The n levels biology connects
N >=3 in tactile oxidation pond, the filler of the biological contact oxidation ponds at different levels adopts spherical compounded mix, filler diameter 8-15cm to hold
Product load is in 1.0-3.0kgBOD5/m3·d。
3. the Biological Contact Oxidation Process of efficient energy-saving according to claim 1, it is characterised in that：The biological contact oxidation
Change the aeration rate in pond according to aeration rate and the ratio of flow of inlet water, gas-water ratio is 5-15:1.
4. the Biological Contact Oxidation Process of efficient energy-saving according to claim 1, it is characterised in that：The biological contact oxidation
The current for changing pond are plug-flow form.
5. the Biological Contact Oxidation Process of efficient energy-saving according to claim 1, it is characterised in that：The activated carbon adsorption
The dosage of the granular active carbon adopted in pond is for 3-10mg/L.
6. the Biological Contact Oxidation Process of efficient energy-saving according to claim 1, it is characterised in that：The dephosphorization pond adopts
Chemical dephosphorization, when phosphorus content of intaking is higher than 4mg/L, starts dephosphorization system, and the coagulant that the dephosphorization system is adopted is polymerization
Aluminum chloride or iron chloride, flocculation aid adopts polyacrylamide, by the dosing pump dosing coagulant in dephosphorization bottom of pond portion and helps solidifying
Agent, coagulant and flocculation aid are added simultaneously, keep the abundant coagulation of coagulant, the coagulant of dephosphorization system to add by aeration
Dose is 5-25mg/L, and flocculation aid chemical feeding quantity is 0.1-1mg/L.
7. the Biological Contact Oxidation Process of efficient energy-saving according to claim 1, it is characterised in that：The sedimentation tank is adopted
Tube settling or advection sedimentation mode carry out precipitation sterilization, and specifically, treating capacity adopts advection sedimentation less than 5 ton days, place
Reason amount adopts tube settling more than 5 ton days.
8. the Biological Contact Oxidation Process of efficient energy-saving according to claim 1, it is characterised in that：The aeration tube or
Aeration plate is microporous aeration disc or micropore aeration pipe.
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| CN201611182131.1A CN106673303A (en) | 2016-12-20 | 2016-12-20 | Multi-effect and energy-saving bio-contact oxidation process |
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| CN201611182131.1A CN106673303A (en) | 2016-12-20 | 2016-12-20 | Multi-effect and energy-saving bio-contact oxidation process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108083582A (en) * | 2017-12-29 | 2018-05-29 | 天津膜天膜科技股份有限公司 | Small-sized sewage treating system and sewage treatment process |
| CN112607964A (en) * | 2020-12-09 | 2021-04-06 | 南京金羚生物基纤维有限公司 | Intelligent sewage treatment MSABP process units |
| CN113461212A (en) * | 2021-07-20 | 2021-10-01 | 中原环保股份有限公司 | Waste plastic processing wastewater treatment device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108083582A (en) * | 2017-12-29 | 2018-05-29 | 天津膜天膜科技股份有限公司 | Small-sized sewage treating system and sewage treatment process |
| CN112607964A (en) * | 2020-12-09 | 2021-04-06 | 南京金羚生物基纤维有限公司 | Intelligent sewage treatment MSABP process units |
| CN113461212A (en) * | 2021-07-20 | 2021-10-01 | 中原环保股份有限公司 | Waste plastic processing wastewater treatment device and method |
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Inventor after: Yin Yanmei Inventor after: Dai Haiping Inventor after: Sun Lei Inventor after: Yang Dawei Inventor after: Zhang Cheng Inventor before: Yin Yanmei Inventor before: Dai Haiping Inventor before: Sun Lei Inventor before: Yang Dawei Inventor before: Zhang Cheng |
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Application publication date: 20170517 |