CN104785075A - Gas membrane separation device capable of eliminating static electricity and method - Google Patents
Gas membrane separation device capable of eliminating static electricity and method Download PDFInfo
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- CN104785075A CN104785075A CN201510203837.0A CN201510203837A CN104785075A CN 104785075 A CN104785075 A CN 104785075A CN 201510203837 A CN201510203837 A CN 201510203837A CN 104785075 A CN104785075 A CN 104785075A
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Abstract
The invention relates to the field of membrane separation devices, and discloses a gas membrane separation device capable of eliminating static electricity and a method. The gas membrane separation device comprises a membrane assembly, wherein the membrane assembly is at least partially prepared from conductive materials; the gas membrane separation device further comprises a conductive mesh which covers a membrane in the membrane assembly and is in contact with the conductive materials. According to the gas membrane separation device, the static electricity accumulated on the membrane surface or in the membrane gap is led out of the membrane assembly through the conductive mesh during membrane separation, in order to achieve the purpose of eliminating the internal static electricity. The gas membrane separation device can effectively eliminate the static electricity in the gas membrane separation process and is suitable for the field of separation of flammable and explosive gases.
Description
Technical field
The present invention relates to technical field of membrane separation, be specifically related to a kind of gaseous jet simulation device and method eliminating electrostatic.
Background technology
In the flammable explosive gas separation and recovery processes such as organic vapor; because gas is not exclusively pure; often containing solid particle or liquid particles such as dust, iron end, drop, steams; electrostatic can be produced by the process such as collision, friction, division of these particles; in addition, swiftly flowing gas flow also can produce electrostatic when flow-guiding screen.Flow-guiding screen due to routine is insulator, and these electrostatic can constantly be piled up, if can not discharge in time, gently then attract dust etc., passage, causes fouling membrane, the heavy then generation electric spark that can discharge when reaching certain voltage value, and running into imflammable gas can blast.Therefore, how discharging electrostatic is in time that film is applied to flammable explosive gas separation field problem demanding prompt solution.
Utility model patent CN201164794Y " laminated gas separation film assembly " relates to a kind of laminated gas separation film assembly, fitted together by the locating pad can assembling location each other made by conductive material by the film separation unit of some, locating pad surrounding has the "O"-ring of sealing that unstrpped gas and product gas are separated.This patent also adopts the short runner of film separation unit to gather possibility at gas flow through film surface to reduce electrostatic, prevents the potential safety hazard that electrostatic brings, thus can process the mist be in explosive range.But this patent flow-guiding screen does not relate to conduction, but utilize locating pad to conduct electricity, decrease the effective area of membrane module to a certain extent.
Patent CN101239279B " antistatic rolling diaphragm separator and preparation method thereof " relates to antistatic rolling diaphragm separator, at membrane module two ends, metal deflector is housed, metal deflector is fixedly connected with metal collection pipe, place wire or the wire netting of some in membrane module internal penetration gas passage, wire or wire netting communicate with metal collection pipe; In feed gas passage, place wire or wire netting, wire or wire netting are connected with metal deflector.The electrostatic that separator interior produces can be reduced in use procedure, there is electrostatic-proof function.
The method of the electrostatic problem in current domestic solution Membrane Gas Separation Processes is very limited, although these methods can solve electrostatic problem, more or less there are some problems.The locating pad or wire netting etc. made as increased conductive material decrease the effective area of membrane module, too increase operational sequence, affect production efficiency; Wire (net) easily scratches face, affects separative efficiency; Wire (net) easily loose contact, the dead angle etc. that locating pad local still has electrostatic to discharge can cause conducting static electricity to be obstructed; Wire (net) corrosion resistance difference etc.
Summary of the invention
The first object of the present invention is the deficiency for above-mentioned electrostatic problem processing method, a kind of method eliminating gaseous jet simulation device electrostatic.
For achieving the above object, the present invention adopts following technical scheme:
A kind of method eliminating gaseous jet simulation device electrostatic, described gaseous jet simulation device comprises membrane module, be prepared from by conductive material at least partly in described membrane module, described method is using conductive mesh as the flow-guiding screen in described gaseous jet simulation device and contact with described conductive material.
Wherein, described flow-guiding screen comprises feed side flow-guiding screen and per-meate side flow-guiding screen.
Wherein, conductive mesh string diameter is 0.1 ~ 2mm, is preferably 0.5 ~ 1mm; Screen distance is 1 ~ 8mm, is preferably 2 ~ 5mm.
Conductive mesh material of the present invention is organic material, metal material, inorganic or mixed materials.
Wherein, the common conductive material that described organic material, metal material, inorganic or mixed materials are known to those skilled in the art.
More specifically, preferred conductive mesh of the present invention uses conductive plastics, and described conductive plastics is prepared from by adding conductive material in plastic master batch, and the conductive mesh surface resistivity be made up of described conductive plastics is 10
2~ 10
7Ω/m
2.
Wherein, the conductive material in described conductive plastics is antistatic filler, carbon system filler or metal filler, and described antistatic filler comprises ethoxylated fatty amine, quarternary ammonium salt compound, fatty acid ester; Described carbon system filler comprises graphite, carbon fiber and carbon black; Described metal filler comprises metallic fiber and/or metal powder.
Plastic master batch in described conductive plastics is PP(polypropylene), PET(polyester), PA(polyamide), polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), one or more in (propylene--butadiene--benzene diene) ABS.
Most preferably conductive mesh of the present invention is by PA(polyamide) be prepared from, for the elimination electrostatic interaction best results of membrane module.
The conductive material of membrane module of the present invention is one or more of metal, alloy and inorganic non-metallic conductive material, concrete Material selec-tion is grasped by those skilled in the art, can meet the overall conductor of formation of the present invention, the present invention is not particularly limited to this.
The second object of the present invention is to provide a kind of gaseous jet simulation device eliminating electrostatic.
A kind of gaseous jet simulation device eliminating electrostatic of the present invention, comprise membrane module, be prepared from by conductive material at least partly in described membrane module, described gaseous jet simulation device also comprises and covers membrane component in described membrane module and the conductive mesh contacted with above-mentioned conductive material.
The gaseous jet simulation device eliminating electrostatic of the present invention is preferred for the flammable mist containing oxygen, wherein imflammable gas comprise hydrogen,
carbon monoxide, methane, ethane,
propane,
butane, ethene, propylene, butylene,
acetylene,
propine, butine,
hydrogen sulfidedeng in one or more.
Device of the present invention, in membrane separating process, conducts membrane module at the electrostatic of film surface or the accumulation of rete gap by conductive mesh, reaches the object eliminating internal electrostatic.
Wherein, described membrane module comprises rolled membrane module, tubular membrane component and stacked membrane module.
As a kind of technical scheme of the present invention, for rolled membrane module, the central tube of described rolled membrane module, shell and at least one end cap are prepared from by conductive material, described conductive mesh coating film element forms its feed side flow-guiding screen and per-meate side flow-guiding screen, and contact connection with described central tube, shell respectively with at least one end cap, make whole membrane module form a conductor from inside to outside.
Specifically, a feed side flow-guiding screen is placed in the front of membrane component (also can be described as diaphragm), a per-meate side flow-guiding screen is placed at the back side, by conductive glue, two membrane component back sides and infiltration are surveyed three limit sealing (another side and central tubes of flow-guiding screen, central tube is porose, after feed gas infiltration can passing hole enter in central tube), forms a film bag, permeates gas and move to the opening direction of film bag.
Conductive glue of the present invention is made up of resin matrix, conducting particles, dispersing additive, auxiliary agent etc.Described resin matrix is one or more in epoxy resin, organic siliconresin, polyimide resin, phenolic resins, polyurethane, acrylic resin.Described conducting particles can be gold, silver, copper, aluminium, zinc, iron, the powder of nickel and graphite and some conductive compounds.
For tubular membrane component, shell and at least one sealing ring of described tubular membrane component are prepared from by conductive material, in tubular membrane elements into intimate is wrapped in by the sleeve that described conductive mesh forms tubular membrane component, and contact connection with described shell respectively with at least one sealing ring, make whole membrane module form a conductor from inside to outside.
For stacked membrane module, shell and the center-pole of described stacked membrane module are prepared from by conductive material, described conductive mesh is arranged on membrane component surface with the form of flow-guiding screen, and to contact with center-pole with described shell and contact connection respectively, make whole membrane module form a conductor from inside to outside.
The present invention is prepared into conductive mesh by flow-guiding screen is surveyed in the membrane component up/down traditional feed side in surface and/or infiltration in membrane module, meets the object of fluid flow guiding distribution and conducting static electricity simultaneously.The method is simple to operate, and conducting static electricity effect is better, is applicable to flammable explosive gas separation field.
Conductive mesh of the present invention for having electric conductivity, or has the network structure of conduction and distribution diversion function simultaneously.
Wherein, conductive mesh string diameter is 0.1 ~ 2mm, is preferably 0.5 ~ 1mm; Screen distance is 1 ~ 8mm, is preferably 2 ~ 5mm.
Conductive mesh material of the present invention is organic material, metal material, inorganic or mixed materials.
Wherein, the common conductive material that described organic material, metal material, inorganic or mixed materials are known to those skilled in the art.
More specifically, preferred conductive mesh of the present invention uses conductive plastics, and described conductive plastics is prepared from by adding conductive material in plastic master batch, and the conductive mesh surface resistivity be made up of described conductive plastics is 10
2~ 10
7Ω/m
2.
Wherein, the conductive material in described conductive plastics is antistatic filler, carbon system filler or metal filler, and described antistatic filler comprises ethoxylated fatty amine, quarternary ammonium salt compound, fatty acid ester; Described carbon system filler comprises graphite, carbon fiber and carbon black; Described metal filler comprises metallic fiber and/or metal powder.
Plastic master batch in described conductive plastics is PP(polypropylene), PET(polyester), PA(polyamide), polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), one or more in (propylene--butadiene--benzene diene) ABS.
Most preferably conductive mesh of the present invention is by PA(polyamide) be prepared from, for the elimination electrostatic interaction best results of membrane module.
The conductive material of membrane module of the present invention is one or more of metal, alloy and inorganic non-metallic conductive material, concrete Material selec-tion is grasped by those skilled in the art, can meet the overall conductor of formation of the present invention, the present invention is not particularly limited to this.
At present conductive plastics be used for the flow-guiding screen of membrane module thus eliminate that the technology of electrostatic is domestic has no report, adopting technical scheme of the present invention, there is following innovative point:
(1) flow-guiding screen is prepared into conductive mesh, make film internal gas passageways, central tube and end cap etc. become a conductor, electrostatic can be discharged by ground connection in time;
(2) with interspersed wire or spread wire netting, increase the elimination electrostatic techniques such as the locating pad that conductive material makes and compare, decrease the effective area of membrane module, simplified assembly production process, improve production efficiency;
(3) Plastic conductive net made of soft, avoids the face destruction of introducing wire (net) and causing;
(4) Plastic conductive net more easily with metal center pipe and metal end contact, avoid the loose contact that introducing wire (net) causes, stop potential safety hazard;
(5) in Long-Time Service process, (as under vibrations, hygrothermal environment factor) safely, reliably, image surface method (flow-guiding screen surface is coated with conduction liquid) can not be peeling like that and obscission, also avoids the shortcoming of wire (net) corrosion resistance difference.
Accompanying drawing explanation
Fig. 1 a and b is rolled membrane module structural representation of the present invention.
Fig. 2 is tubular membrane component structural representation of the present invention.
Fig. 3 is the stacked membrane module structure schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Following examples are only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
embodiment 1
Present embodiments provide a kind of method eliminating gaseous jet simulation device electrostatic, wherein said gaseous jet simulation device comprises membrane module, be prepared from by conductive material (conventional conductive material) at least partly in this membrane module, method described in the present embodiment is using conductive mesh as the feed side flow-guiding screen in described gaseous jet simulation device and/or per-meate side flow-guiding screen and contact with described conductive material.
embodiment 2
Compared with embodiment 1, distinctive points is only, in the method described in the present embodiment, feed side flow-guiding screen string diameter is 1mm, and aperture is 5mm; Per-meate side flow-guiding screen string diameter is 0.5mm, and aperture is 2mm, and the two is prepared from by conductive plastics, and wherein using polyvinyl chloride as the plastic matrix in conductive plastics, the conductive material in conductive plastics is graphite powder.
embodiment 3
Compared with embodiment 1, distinctive points is only, in the method described in the present embodiment, feed side flow-guiding screen string diameter is 0.5mm, and aperture is 2mm; Per-meate side flow-guiding screen string diameter is 0.5mm, and aperture is 2mm.The two all adopts conductive plastics to be prepared from, and wherein using polypropylene as the plastic matrix in conductive plastics, the conductive material in conductive plastics is carbon black.
embodiment 4
Compared with embodiment 1, distinctive points is only, in the method described in the present embodiment, feed side flow-guiding screen and per-meate side flow-guiding screen all adopt conductive plastics to be prepared from, and the plastic master batch in conductive plastics is nylon (PA), and conducting particles is carbon black, feed side flow-guiding screen string diameter is 2mm, and aperture is 8mm; Per-meate side flow-guiding screen string diameter is 0.1mm, and aperture is 1mm.
embodiment 5
Present embodiments provide a kind of gaseous jet simulation device eliminating electrostatic, in described gaseous jet simulation device, membrane module structure pattern is rolling, as shown in Fig. 1 (b), rolled film separation assembly is contained in shell, and central tube 3, end cap 4 of assembly and shell are metal material.Membrane component 1(also can be described as diaphragm) front place a feed side flow-guiding screen 20, a per-meate side flow-guiding screen 21 is placed at the back side, per-meate side flow-guiding screen is clipped in two diaphragms, with glue, its three limit is sealed, form a film bag, infiltration gas moves to the opening direction of film bag, finally collects in core barrel in a metal.Air inlet side flow-guiding screen is contacted with metal end by one end ring shaped conductive connection network 7, and metal end is connected with metal shell.Feed side flow-guiding screen, per-meate side flow-guiding screen and assembly two ends ring shaped conductive connection network 7 all adopt conductive plastics to be prepared from, and wherein using polyvinyl chloride as the plastic matrix in conductive plastics, the conductive material in conductive plastics is graphite powder.Feed side flow-guiding screen string diameter is 1mm, and aperture is 5mm; Per-meate side flow-guiding screen string diameter is 0.5mm, and aperture is 2mm; Ring shaped conductive connection network string diameter is 0.5mm, and aperture is 1mm.Per-meate side flow-guiding screen is by being main base with epoxy resin, iron powder is that conductive glue prepared by conducting particles is fixed on metal center pipe, metal center pipe is connected with metal end, air inlet side flow-guiding screen contacts with metal end, metal end is connected with metal shell, whole membrane module is formed from inside to outside a conductor.
embodiment 6
Present embodiments provide a kind of gaseous jet simulation device eliminating electrostatic, in described gaseous jet simulation device, membrane module structure pattern is rolling, as shown in Fig. 1 (b), loaded in shell by rolled film separation assembly, the metal center pipe 3 of assembly, shell and two end caps 4 are metal material.A feed side flow-guiding screen 20 is placed in the front of diaphragm 1, and a per-meate side flow-guiding screen 21 is placed at the back side, and per-meate side flow-guiding screen is clipped in two diaphragms, with glue, its three limit is sealed, form a film bag, infiltration gas moves to the opening direction of film bag, finally collects in core barrel in a metal.Feed side flow-guiding screen, per-meate side flow-guiding screen and assembly two ends ring shaped conductive connection network 7 all adopt conductive plastics to be prepared from, and wherein using polypropylene as the plastic matrix in conductive plastics, the conductive material in conductive plastics is carbon black.Feed side flow-guiding screen string diameter is 0.5mm, and aperture is 2mm; Per-meate side flow-guiding screen string diameter is 0.5mm, and aperture is 2mm; Ring shaped conductive connection network string diameter is 0.5mm, and aperture is 2mm.Per-meate side flow-guiding screen is by being main base with polyimide resin, polyurethane, graphite is that conductive glue prepared by conducting particles is fixed on metal center pipe, metal center pipe is connected with metal end, air inlet side flow-guiding screen is contacted with metal end by two ends ring shaped conductive connection network 7, metal end is connected with metal shell, whole membrane module is formed from inside to outside a conductor.
embodiment 7
Present embodiments provide a kind of gaseous jet simulation device eliminating electrostatic, in described gaseous jet simulation device, membrane module structure pattern is rolling, as shown in Fig. 1 (a), loaded in shell by rolled film separation assembly, central tube 3, two end caps 4 of assembly and shell are metal material.A feed side flow-guiding screen 20 is placed in the front of diaphragm 1, and a per-meate side flow-guiding screen 21 is placed at the back side, and per-meate side flow-guiding screen is clipped in two diaphragms, with glue, its three limit is sealed, form a film bag, infiltration gas moves to the opening direction of film bag, finally collects in core barrel in a metal.Feed side flow-guiding screen and per-meate side flow-guiding screen all adopt conductive plastics to be prepared from, and the plastic master batch in conductive plastics is nylon (PA), and conducting particles is carbon black, and feed side flow-guiding screen string diameter is 2mm, and aperture is 8mm; Per-meate side flow-guiding screen string diameter is 0.1mm, and aperture is 1mm; Ring shaped conductive connection network string diameter is 2mm, and aperture is 8mm.Per-meate side flow-guiding screen polyimide resin, polyurethane are main base, graphite is that conductive glue prepared by conducting particles is fixed on metal center pipe, metal center pipe is connected with metal end, air inlet side flow-guiding screen and metal end are provided with power spring, make conductive mesh and metal end close contact, metal end is connected with metal shell whole membrane module is formed a conductor from inside to outside.
embodiment 8
Present embodiments provide a kind of gaseous jet simulation device eliminating electrostatic, in described gaseous jet simulation device, membrane module structure pattern is tubular type, as shown in Figure 2, earthenware is inside established to make the gas separaion membrane component supported, nylon conductive plastic base particle is added carbon black material and is processed into conductive plastics net cylinder 22, length sleeve is suitable with film length of tube, sleeve diameter is more bigger than film pipe diameter, earthenware gas separation membrane 11 is convenient to put into conductive plastics net cylinder, sleeve and pipe outer wall are wound around every a segment distance wire by pipe outer wall, to ensure that conductive mesh contacts closely with earthenware.The two ends conductive seal circle 6 of earthenware seals, the inner side of conductive seal circle and conductive mesh casing-contact, and outside contacts with stainless steel metal shell 5, makes whole membrane module become a conductor.
embodiment 9
Present embodiments provide a kind of gaseous jet simulation device eliminating electrostatic, in described gaseous jet simulation device, membrane module structure pattern is stacked, as shown in Figure 3, its shell 51, center-pole 31 all adopt stainless steel metal material to make, the conductive plastics net that the conductive plastics that flow-guiding screen 23 adds machining graphite one-tenth for nylon plastic(s) master batch is prepared from, the string diameter of flow-guiding screen 23 is 2mm, and aperture is 8mm.Flow-guiding screen 23 is diaphragm 12 above, and the obverse and reverse of diaphragm 12 is respectively equipped with conductive mesh 23, and the inner side of conductive mesh 23 is connected with metal center bar, and center-pole is connected with metal shell, makes lamination inside and metal shell be linked to be a whole conductor.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. can eliminate the method for gaseous jet simulation device electrostatic for one kind, described gaseous jet simulation device comprises membrane module, be prepared from by conductive material at least partly in described membrane module, it is characterized in that, contact with described conductive material using conductive mesh as the flow-guiding screen in described gaseous jet simulation device.
2. method according to claim 1, is characterized in that: described conductive mesh string diameter is 0.1 ~ 2mm, is preferably 0.5 ~ 1mm; Screen distance is 1 ~ 8mm, is preferably 2 ~ 5mm.
3. method according to claim 1 and 2, is characterized in that: the material of described conductive mesh is organic material, metal material, inorganic or mixed materials; Preferred conductive plastics.
4. method according to claim 1 and 2, is characterized in that: described conductive plastics is prepared from by adding conductive material in plastic master batch; The conductive mesh surface resistivity be made up of described conductive plastics is 10
2~ 10
7Ω/m
2; Conductive material in preferred described conductive plastics is antistatic filler, carbon system filler or metal filler, and described antistatic filler comprises ethoxylated fatty amine, quarternary ammonium salt compound, fatty acid ester; Described carbon system filler comprises graphite, carbon fiber and carbon black; Described metal filler comprises metallic fiber and/or metal powder; Plastic master batch in preferred described conductive plastics is one or more in polypropylene, polyester, polyamide, polyethylene, polyvinyl chloride, polystyrene, acrylic-butadiene-benzene diene.
5. can eliminate the gaseous jet simulation device of electrostatic for one kind, comprise membrane module, it is characterized in that: be prepared from by conductive material at least partly in described membrane module, described gaseous jet simulation device also comprises and covers membrane component in described membrane module and the conductive mesh contacted with above-mentioned conductive material.
6. gaseous jet simulation device according to claim 5, is characterized in that: described membrane module comprises rolled membrane module, tubular membrane component and stacked membrane module.
7. gaseous jet simulation device according to claim 6, it is characterized in that: the central tube of described rolled membrane module, shell and at least one end cap are prepared from by conductive material, described conductive mesh coating film element forms its feed side flow-guiding screen and per-meate side flow-guiding screen, and contact connection with described central tube, shell respectively with at least one end cap, make whole membrane module form a conductor from inside to outside.
8. gaseous jet simulation device according to claim 6, it is characterized in that: shell and at least one sealing ring of described tubular membrane component are prepared from by conductive material, in tubular membrane elements into intimate is wrapped in by the sleeve that described conductive mesh forms tubular membrane component, and contact connection with described shell respectively with at least one sealing ring, make whole membrane module form a conductor from inside to outside.
9. gaseous jet simulation device according to claim 6, it is characterized in that: shell and the center-pole of described stacked membrane module are prepared from by conductive material, described conductive mesh is arranged on membrane component surface with the form of flow-guiding screen, and to contact with center-pole with described shell and contact connection respectively, make whole membrane module form a conductor from inside to outside.
10. the gaseous jet simulation device according to any one of claim 5 ~ 9, is characterized in that: the conductive material of described membrane module is one or more of metal, alloy and inorganic non-metallic conductive material.
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Cited By (5)
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| CN105113117A (en) * | 2015-09-18 | 2015-12-02 | 南京九思高科技有限公司 | Anti-static flow diversion net and preparation method and application thereof |
| CN105413226A (en) * | 2015-12-23 | 2016-03-23 | 南京九思高科技有限公司 | Organic waste gas recycling device and organic waste gas recycling process based on membrane-method coupled condensation adsorption |
| CN109664530A (en) * | 2018-12-19 | 2019-04-23 | 南京九思高科技有限公司 | A kind of improved antistatic flow-guiding screen and its preparation method and application |
| CN114950141A (en) * | 2022-06-08 | 2022-08-30 | 林金龙 | Conductive separation membrane bag and application thereof |
| CN115364704A (en) * | 2022-10-25 | 2022-11-22 | 天津工业大学 | Polyacrylonitrile-carbon nano tube electroactive film with selective oxidation function and application |
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| CN109664530A (en) * | 2018-12-19 | 2019-04-23 | 南京九思高科技有限公司 | A kind of improved antistatic flow-guiding screen and its preparation method and application |
| CN114950141A (en) * | 2022-06-08 | 2022-08-30 | 林金龙 | Conductive separation membrane bag and application thereof |
| CN114950141B (en) * | 2022-06-08 | 2024-01-26 | 林金龙 | Conductive separation film bag and application thereof |
| CN115364704A (en) * | 2022-10-25 | 2022-11-22 | 天津工业大学 | Polyacrylonitrile-carbon nano tube electroactive film with selective oxidation function and application |
| CN115364704B (en) * | 2022-10-25 | 2023-01-03 | 天津工业大学 | Polyacrylonitrile-carbon nano tube electroactive film with selective oxidation function and application |
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| CN104785075B (en) | 2018-12-28 |
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Effective date of registration: 20201106 Address after: No.1, yanchuang garden, Nanjing area, China (Jiangsu) pilot Free Trade Zone, Nanjing, Jiangsu Province, 211800 Patentee after: Jiangsu jiumo Hi Tech Co., Ltd Address before: 211800 No. 8 Fenghuang Road, Pukou Economic Development Zone, Nanjing, Jiangsu Patentee before: NANJING JIUSI HIGH-TECH Co.,Ltd. |
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