CN108164039A - A kind of formalin wastewater treatment instrument - Google Patents
A kind of formalin wastewater treatment instrument Download PDFInfo
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- CN108164039A CN108164039A CN201810012403.6A CN201810012403A CN108164039A CN 108164039 A CN108164039 A CN 108164039A CN 201810012403 A CN201810012403 A CN 201810012403A CN 108164039 A CN108164039 A CN 108164039A
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- waste liquid
- formalin
- wastewater treatment
- treatment instrument
- conveyance conduit
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
- B01D2253/202—Polymeric adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/46—Materials comprising a mixture of inorganic and organic materials
-
- 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
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a kind of formalin wastewater treatment instrument, and successively including waste collection bucket, for collecting formalin waste water, the waste collection bucket is provided with the first waste liquid entrance, the first waste liquid outlet, removable filter net；Retort, the second waste liquid entrance, the second waste liquid outlet, stirring structure, reaction reagent adding mouth, deflation valve are provided in the retort, the second waste liquid entrance is connected with the first waste liquid outlet by the first conveyance conduit, the first delivery pump is provided on first conveyance conduit, the second conveyance conduit is connected on second waste liquid outlet, waste liquid sampling observation mouth, solenoid valve are disposed on second conveyance conduit；Solenoid valve is again provided in the reaction reagent adding mouth, portion is provided with formaldehyde absorbing structure to the vent valve outdoors.The present invention compared with prior art, can with PARA FORMALDEHYDE PRILLS(91,95) waste water carry out continuous processing, while it is small, at low cost, except effect of formaldehyde it is good, environmentally friendly.
Description
Technical field
The invention belongs to sewage treatment fields, are a kind of processing units of formalin waste water specifically.
Background technology
The medical and health organization of numerous domestic, laboratory, research and development company, legal medical expert mechanism and small-sized manufacturing enterprise at present,
Can not realize the processing of formalin waste water, be the commission third-party institution on behalf of being handled, this operational mode exists
Several deficiencies：(1) environmental risk is larger.Typically now all it is to collect to reprocess afterwards to a certain extent, the generation circulation of pollutant
Link is more, and environmental risk is big.(2) processing cost is high.(3) secondary pollution.The formalin waste water of third company's processing at present
Processing is mixed with other high concentrated organic wastewaters mostly, is then burned, there are the secondary pollutions such as bioxin.(4) field
Ground air pollution.Formalin waste water is typically necessary storage one month or so (or even longer time), to shadows such as air environments
Ring the health for greatly, seriously endangering employee.
Invention content
The present invention is to solve the above problems, provide the formalin wastewater treatment instrument of a miniaturization, environmental protection.
To realize the above-mentioned technical purpose, the technical solution adopted by the present invention is as follows：
A kind of formalin wastewater treatment instrument, includes successively：
Waste collection bucket, for collecting formalin waste water, the waste collection bucket is provided with the first waste liquid entrance, first
Waste liquid outlet, removable filter net；
Retort is provided with the second waste liquid entrance, the second waste liquid outlet, stirring structure, reaction reagent in the retort
Adding mouth, deflation valve, the second waste liquid entrance are connected with the first waste liquid outlet by the first conveyance conduit, and described first is defeated
It send and the first delivery pump is provided on pipeline, the second conveyance conduit, second delivery pipe are connected on second waste liquid outlet
Waste liquid sampling observation mouth, solenoid valve are disposed on road；Solenoid valve, the deflation are again provided in the reaction reagent adding mouth
Formaldehyde absorbing structure is provided with outside valve.
Using the invention of above-mentioned technical proposal, the first waste liquid entrance is connected with waste liquid generating region, and waste liquid barrel is collected
Bucket is connected with retort, can carry out continuous processing to waste liquid, avoids formalin waste liquid caused by long-term storage is to environment
Pollution.For waste liquid barrel for collecting formalin waste water, filter screen can filter out the impurity in waste water；Retort is used for formaldehyde oxygen
It is melted into free of contamination carbon dioxide and water；Deflation valve is used to discharge the gas generated in retort, ensures the pressure in retort
By force in a certain range；Formaldehyde absorbing structure is used to adsorb the formaldehyde in discharge gas, avoids formaldehyde pollution environment；Waste liquid is inspected by random samples
Mouth sees whether reach discharge standard for detecting the content of formaldehyde in waste liquid.
It further limits, the stirring structure includes being plugged in the agitating paddle inside retort, is arranged on above retort
Driving motor.
Agitating paddle quickening formaldehyde is reacted with reaction reagent, accelerates reaction speed.
It further limits, is additionally provided with circulating line on second conveyance conduit, the circulating line is reacted with described
Tank connects, and solenoid valve is provided on the circulating line, and the circulating line is located at waste liquid sampling observation mouth and the second delivery pipe
Between solenoid valve on road.
Underproof waste water will be inspected by random samples and be delivered in retort that the reaction was continued by circulating line, until sampling observation is qualified, protected
Demonstrate,prove the zero-emission of formaldehyde.
It further limits, the formaldehyde absorbing structure includes double-layer leaching net, the formaldehyde being folded in the double-layer leaching net is inhaled
Attached dose.
It further limits, the formaldehyde adsorbent includes active carbon particle, chitosan, macromolecule organic amine polymer, more
First alkoxide polymer.
There are three types of approach for the absorption of PARA FORMALDEHYDE PRILLS(91,95), are that chemisorbed, physical absorption and chemistry are completely inhaled with physics respectively
It is attached.Chemisorbed be using chemical reagent oxidize the formaldehyde into carbon dioxide and water or using amino as main active function groups with
Formaldehyde reacts to absorb formaldehyde.Physical absorption is by the larger specific surface area of adsorbent in itself, is had certain
Since formaldehyde molecule has certain memory, first is adsorbed using the charge or Van der Waals force of adsorbent for adsorption site
Aldehyde.But physical absorption is a reversible process, under certain condition, adsorbent can be desorbed formaldehyde.
Active carbon particle attracts each other by the Van der Waals force between formaldehyde molecule and activated carbon, first will as basis material
Formaldehyde absorbing is on its surface.
Chitosan is the deacetylated product of chitin, has macromolecular backbone, after being dissolved in acid solution, amino carries
Positive charge greatly strengthens the polarity of its own, and which increase the possibilities of its physical absorption formaldehyde.
Macromolecule organic amine polymer, polyhydric alcohol polymer have a large amount of amido functional group and a small amount of hydroxyl luminous energy
Group, amido functional group can rapidly be reacted with formaldehyde gas, and hydroxyl can enhance the moisture pick-up properties of adsorbent surface, in adsorbent surface
Water membrane is formed, quickening reaction speed improves purification efficiency in adsorbent surface absorption, enrichment so as to promote formaldehyde.
By activated carbon, chitosan, macromolecule organic amine polymer, polyhydric alcohol polymer it is compound after, it is larger by activated carbon
Surface area, the backbone of chitosan, hydroxyl moisture pick-up properties one work formaldehyde adsorption, then pass through amido functional group and formaldehyde
It is reacted, so as to avoid in formaldehyde emissions to air.
It further limits, by weight percentage, the content of the active carbon particle is 20%-50%, and the chitosan is
20%-30%, the macromolecule organic amine polymer are 30%-50%, and the polyalcohol is 1%-5%.
It further limits, the macromolecule organic amine polymer is polyethylene polyamine polymer.
It further limits, the polyalcohol is polyethylene glycol.
The present invention compared with prior art, can with PARA FORMALDEHYDE PRILLS(91,95) waste water carry out continuous processing, while it is small, at low cost, except first
Aldehyde effect is good, environmentally friendly.
Description of the drawings
The present invention can be further illustrated by the nonlimiting examples that attached drawing provides；
Fig. 1 is the structural diagram of the present invention；
Main element symbol description is as follows：
Waste collection bucket 1, the first waste liquid entrance 11, the first waste liquid outlet 12, removable filter net 13, the first delivery pipe
14th, the first delivery pump 141, retort 2, the second waste liquid entrance 21, the second waste liquid outlet 22, stirring structure 23, agitating paddle 231,
Driving motor 232, reaction reagent adding mouth 24, deflation valve 25, formaldehyde absorbing structure 251, the second conveyance conduit 26, waste liquid are taken out
Examine mouth 27, circulating line 28, solenoid valve 3.
Specific embodiment
In order to make those skilled in the art that the present invention may be better understood, with reference to the accompanying drawings and examples to this hair
Bright technical solution further illustrates.
As shown in Figure 1, a kind of formalin wastewater treatment instrument, includes successively：
Waste collection bucket 1, for collecting formalin waste water, the waste collection bucket be provided with the first waste liquid entrance 11,
First waste liquid outlet 12, removable filter net 13；
Retort 2 is provided with the second waste liquid entrance 21, the second waste liquid outlet 22, stirring structure 23, anti-in the retort
Reagent adding mouth 24, deflation valve 25 are answered, the second waste liquid entrance 21 and the first waste liquid outlet 12 pass through the first delivery pipe 14
Road is connected, and the first delivery pump 141 is provided on first conveyance conduit 14, second is connected on second waste liquid outlet 22
Conveyance conduit 26 is disposed with waste liquid sampling observation mouth 27, solenoid valve 3 on second conveyance conduit 26；The reaction reagent adds
Add and solenoid valve 3 is again provided on mouth 24, formaldehyde absorbing structure 251 is provided with outside the deflation valve 25.
The stirring structure 23 includes being plugged in the agitating paddle 231 inside retort 2, is arranged on the drive of 2 top of retort
Dynamic motor 232.
Circulating line 28 is additionally provided on second conveyance conduit 26, the circulating line 28 connects with the retort 2
It is logical, solenoid valve 3 is provided on the circulating line 28, the circulating line 28 is located at waste liquid sampling observation mouth 27 and second and conveys
Between solenoid valve 3 on pipeline 26.
The formaldehyde absorbing structure 251 includes double-layer leaching net, the formaldehyde adsorbent being folded in the double-layer leaching net.It is described
Formaldehyde adsorbent includes 40% active carbon particle, 25% chitosan, 32% polyethylene polyamine polymer, 3% poly- second
Glycol.
Specifically, the present apparatus is controlled by PLC control system, wherein the first waste liquid entrance 11, the first waste liquid outlet 12,
Solenoid valve 3 is also equipped in reaction reagent adding mouth 24, all solenoid valves 3, driving motor 232, delivery pump are controlled with PLC
System connects.
First waste liquid entrance 11 is directly connect with formalin waste liquid source, the end of the second conveyance conduit 26 directly with dirt
Water discharge system is connected.
In order to reduce the releasing of the heat in reaction process, can will be added in retort 2 together with reaction reagent and waste liquid；
In order to accelerate distributing for heat in reaction process, an exhaust fan can be installed at deflation valve 25.
A kind of formalin wastewater treatment instrument provided by the invention is described in detail above.Specific embodiment is said
The bright method and its core concept for being merely used to help understand the present invention.It should be pointed out that the ordinary skill for the art
For personnel, without departing from the principle of the present invention, can also to the present invention some improvement and modification can also be carried out, these improvement
It is also fallen within the protection scope of the claims of the present invention with modification.
Claims (8)
1. a kind of formalin wastewater treatment instrument, which is characterized in that include successively：
Waste collection bucket, for collecting formalin waste water, the waste collection bucket is provided with the first waste liquid entrance, the first waste liquid
Outlet, removable filter net；
Retort is provided with the second waste liquid entrance, the second waste liquid outlet, stirring structure, reaction reagent addition in the retort
Mouth, deflation valve, the second waste liquid entrance are connected with the first waste liquid outlet by the first conveyance conduit, first delivery pipe
The first delivery pump is provided on road, is connected with the second conveyance conduit on second waste liquid outlet, on second conveyance conduit
It is disposed with waste liquid sampling observation mouth, solenoid valve；Solenoid valve, the deflation valve are again provided in the reaction reagent adding mouth
Outside is provided with formaldehyde absorbing structure.
2. a kind of formalin wastewater treatment instrument according to claim 1, which is characterized in that the stirring structure includes inserting
The agitating paddle being located inside retort, the driving motor being arranged on above retort.
3. a kind of formalin wastewater treatment instrument according to claim 1, which is characterized in that on second conveyance conduit
Circulating line is additionally provided with, the circulating line is connected with the retort, and solenoid valve is provided on the circulating line, described
Circulating line is located between the solenoid valve on waste liquid sampling observation mouth and the second conveyance conduit.
A kind of 4. formalin wastewater treatment instrument according to claim 1, which is characterized in that the formaldehyde absorbing structure packet
Include double-layer leaching net, the formaldehyde adsorbent being folded in the double-layer leaching net.
5. a kind of formalin wastewater treatment instrument according to claim 4, which is characterized in that the formaldehyde adsorbent includes
Active carbon particle, chitosan, macromolecule organic amine polymer, polyhydric alcohol polymer.
6. a kind of formalin wastewater treatment instrument according to claim 5, which is characterized in that by weight percentage, described
The content of active carbon particle is 20%-50%, and the chitosan is 20%-30%, and the macromolecule organic amine polymer is
30%-50%, the polyalcohol are 1%-5%.
7. a kind of formalin wastewater treatment instrument according to claim 6, which is characterized in that the macromolecule organic amine gathers
Conjunction object is polyethylene polyamine polymer.
8. a kind of formalin wastewater treatment instrument according to claim 6, which is characterized in that the polyalcohol is poly- second two
Alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810012403.6A CN108164039A (en) | 2018-01-05 | 2018-01-05 | A kind of formalin wastewater treatment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810012403.6A CN108164039A (en) | 2018-01-05 | 2018-01-05 | A kind of formalin wastewater treatment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108164039A true CN108164039A (en) | 2018-06-15 |
Family
ID=62517642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810012403.6A Pending CN108164039A (en) | 2018-01-05 | 2018-01-05 | A kind of formalin wastewater treatment instrument |
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| CN (1) | CN108164039A (en) |
Citations (9)
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|---|---|---|---|---|
| CN101468305A (en) * | 2007-12-29 | 2009-07-01 | 中国船舶重工集团公司第七一八研究所 | Methyl aldehyde adsorbing substance and preparation method thereof |
| CN202181234U (en) * | 2011-07-29 | 2012-04-04 | 湖北中烟工业有限责任公司 | Full-automatic treatment device for laboratory chemical waste liquids |
| CN102674528A (en) * | 2012-05-28 | 2012-09-19 | 中国石油天然气股份有限公司 | Method for treating low-concentration methanol wastewater under synergistic action of ultrasonic waves and ozone |
| CN104437422A (en) * | 2014-10-21 | 2015-03-25 | 繁昌县倍思生产力促进中心有限公司 | Adsorbent for formaldehyde-scavenging haze-preventing gauze mask and preparation method thereof |
| CN205151984U (en) * | 2015-11-17 | 2016-04-13 | 张家港市华亿科教设备有限公司 | Formalin liquid water disposal system |
| CN106075797A (en) * | 2016-05-20 | 2016-11-09 | 崔文艳 | A kind of preparation method and application decomposing low molecule aldehyde compositions without illumination |
| CN106673168A (en) * | 2017-03-06 | 2017-05-17 | 左家瑞 | Laboratory waste liquid collection and treatment device |
| CN206591000U (en) * | 2017-02-25 | 2017-10-27 | 云和县东泽阀门有限公司 | A kind of electroplating wastewater recycle device |
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-
2018
- 2018-01-05 CN CN201810012403.6A patent/CN108164039A/en active Pending
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|---|---|---|---|---|
| CN101468305A (en) * | 2007-12-29 | 2009-07-01 | 中国船舶重工集团公司第七一八研究所 | Methyl aldehyde adsorbing substance and preparation method thereof |
| CN202181234U (en) * | 2011-07-29 | 2012-04-04 | 湖北中烟工业有限责任公司 | Full-automatic treatment device for laboratory chemical waste liquids |
| CN102674528A (en) * | 2012-05-28 | 2012-09-19 | 中国石油天然气股份有限公司 | Method for treating low-concentration methanol wastewater under synergistic action of ultrasonic waves and ozone |
| CN104437422A (en) * | 2014-10-21 | 2015-03-25 | 繁昌县倍思生产力促进中心有限公司 | Adsorbent for formaldehyde-scavenging haze-preventing gauze mask and preparation method thereof |
| CN205151984U (en) * | 2015-11-17 | 2016-04-13 | 张家港市华亿科教设备有限公司 | Formalin liquid water disposal system |
| CN106075797A (en) * | 2016-05-20 | 2016-11-09 | 崔文艳 | A kind of preparation method and application decomposing low molecule aldehyde compositions without illumination |
| CN107456841A (en) * | 2017-01-12 | 2017-12-12 | 伦慧东 | A kind of formaldehyde catching agent and the purification of air kit comprising the agent for capturing |
| CN206591000U (en) * | 2017-02-25 | 2017-10-27 | 云和县东泽阀门有限公司 | A kind of electroplating wastewater recycle device |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20191225 Address after: 4-1, No.206, zhangjiahuayuan street, Yuzhong District, Chongqing 400000 Applicant after: Chen Yufeng Address before: 400042 1 Olympic road, Kowloon Po, Chongqing, No. 6-27-10. Applicant before: Chongqing Zan long biological technology Co. Ltd. |
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Application publication date: 20180615 |
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