CN202028342U - Device for overall modifying membrane module by long-range plasmas - Google Patents
Device for overall modifying membrane module by long-range plasmas Download PDFInfo
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- CN202028342U CN202028342U CN2011200733644U CN201120073364U CN202028342U CN 202028342 U CN202028342 U CN 202028342U CN 2011200733644 U CN2011200733644 U CN 2011200733644U CN 201120073364 U CN201120073364 U CN 201120073364U CN 202028342 U CN202028342 U CN 202028342U
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Abstract
The utility model relates to a device and a method for overall modifying a membrane module by long-range plasmas, belonging to the field of membrane separation and plasmas. The device comprises a vacuum pump, a discharge tube, an air storage tank and a membrane component, wherein an air inlet hole of the discharge tube is connected with the air storage tank through a flow regulating valve, a flower meter and a pipeline and is provided with a vacuum meter; an air outlet hole of the discharge tube is respectively connected with an axial air/liquid inlet hole and a lateral air/liquid inlet hole at one air inlet side of the membrane component through a three-way control valve and the pipeline; and an axial air/liquid outlet hole and a lateral air/liquid outlet hole at one air outlet side of the membrane module are simultaneously connected with the vacuum pump through the three-way control valve and the pipeline. The device realizes scale modification for the whole membrane component consisting of a plurality of flat membranes or tubular membranes, so as to greatly improve the efficiency; and the device can conduct special overall modification for the inner and outer surfaces of the membranes and the hole wall.
Description
Technical field
The utility model relates to a kind of remote plasma that utilizes membrane module is carried out bulk modified device, belongs to membrane separation technique and technical field of plasma.
Background technology
Membrane separation technique be utilize film to each components selection performance in the mixture separate, the new separation technology of purification and concentrated purpose product.Because have that energy consumption is low, separative efficiency is high, equipment is simple, convenient operation and control and advantage such as free from environmental pollution, be widely used in fields such as chemical industry, medicine, light industry, food, weaving, electronics, metallurgy.So-called membrane module be membrane component with certain area with the membrane separator spare that certain form is assembled into, be the elementary cell of in the middle of engineering is used film being installed.Film has flat sheet membrane and tubular film two classes by its shape, and wherein, tubular film has hollow-fibre membrane, periosteum, capillary-pipe film.Membrane module can be divided into three kinds of sheet frame configuration, wound configuration and tubular type configurations.Plate and frame and rolled membrane module all use flat sheet membrane, and tubular type configuration assembly can use hollow-fibre membrane, periosteum or capillary-pipe film, and corresponding membrane module is called hollow fiber film assembly, tubular membrane component and capillary-pipe film assembly.
Development along with membrane separation technique, single membrane material can not satisfy in the practical application needs to combination properties such as PSPP, chemical stability, mechanical strength and anti-pollution and some particular separation performances, and the development of new material need expend a large amount of energy and financial resources with the film for preparing different performance, therefore, to macromolecule member material, usually adopt the method for membrane surface modification, on the film matrix material, introduce specific group or polymer side chain, with the separating property of improving film or make film surface-functionalized.
The principle of plasma surface modification be non-polymerization gas in plasma reactor by plasma exciatiaon, generate various active particles such as ion, excited state molecule, free radical, these active particle bombardment membrane material surfaces, produce surface free radical or form cross-linked structure, can introduce the particular functional group on the film surface, even further by with organic monomer reaction, graft polymerization, form new polymer side chain on the film surface.Plasma grafting owing to have can select the monomer scope extensively, only to surface modification, introduce characteristics such as the grafting layer is thin and even and get more and more people's extensive concerning.
Remote plasma is the new technology of utilizing plasma treatment that occurs the nineties in last century.Handle different with traditional plasma, sample is not to be positioned over region of discharge, but leave region of discharge one segment distance, because the free radical in the plasma has than electronics and longer life-span of ion, therefore, in position away from region of discharge, the concentration of free radical is higher, and the concentration of electronics, ion is lower, thereby has reduced the damage that the bombardment of sample is caused owing to high energy active particles such as electronics, ions, help controlling goal response, particularly strengthen the chemical reaction that free radical causes.
The utility model patent (CN101530777A) that the domestic Chen Jie Rong of Xi'an Communications University is applied for discloses a kind of plasma chemical reaction unit, comprises vavuum pump, discharge reaction tube, is wrapped in inductance coil, radio-frequency power supply and air accumulator on the import pipeline section of discharge reaction tube.It is characterized in that, also comprise the radical reaction chamber as remote locations, its outlet is communicated with vavuum pump, and import is communicated with the outlet of discharge reaction tube.Discharge reaction tube is a region of discharge by inducer, is the diffusion region by outlet section.The as a whole pipeline section of discharge reaction tube and radical reaction chamber.Adopt this covering device, this group member utilizes remote plasmas such as argon, nitrogen that materials such as polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC) and NACF have successfully been carried out modification.
But, the film individuality (comprising hollow-fibre membrane, periosteum, capillary-pipe film and flat sheet membrane) that present remote plasma body technique is only limited to being positioned in the discharge reaction tube carries out surface modification, can't modify hollow fiber film assembly, tubular membrane component or the capillary-pipe film assembly scale of carrying out that constitutes by many/single film assembling, also can't modify assemble the plate and frame module that the constitutes scale of carrying out by many/monolithic flat sheet membrane.
Summary of the invention
The purpose of this utility model is can't carry out the shortcoming that scale is modified to the whole membrane module of many flat sheet membrane or tubular film composition in order to solve existing remote plasma surface modification device, and provides a kind of remote plasma that utilizes that membrane module is carried out bulk modified device.
The purpose of this utility model is achieved through the following technical solutions:
A kind of remote plasma that utilizes of the present utility model carries out the whole device of modifying to membrane module, comprise vavuum pump, discharge tube, air accumulator, be wrapped in the inductance coil on the discharge tube, the radio circuit that is connected with inductance coil, the air admission hole of discharge tube is connected with the air accumulator pipeline with flowmeter by flow control valve, and the air admission hole of discharge tube is provided with vacuum meter; Also comprise membrane module, the venthole of discharge tube advances gas/liquid hole pipeline with the axial admission/liquid hole of membrane module air inlet one side with side direction respectively by three-way control valve and links to each other, and the give vent to anger gas/liquid hole that axially goes out of a side of membrane module goes out the gas/liquid hole with side direction and links to each other with the vavuum pump pipeline by three-way control valve simultaneously.
Wherein, described vacuum meter also can be arranged on the pipeline between discharge tube and the membrane module.
Distance between described discharge tube and the membrane module is 0～40cm.
Described membrane module is hollow fiber film assembly, tubular film assembly, capillary-pipe film assembly, plate film assembly.
Film in the described membrane module is the tubulose inoranic membrane that polymeric membrane, surface recombination have macromolecule member material.
The non-polymerization gas that being used to of storing in the described air accumulator produces plasma is air, CO
2, nitrogen, ammonia, argon gas, oxygen, hydrogen, steam.
Adopt device of the present utility model that various membrane modules are carried out the method for plasma surface modification, concrete grammar is:
With the non-polymerization gas in the air accumulator in discharge tube by plasma exciatiaon, generate various active particles such as ion, excited state molecule, free radical, the swabbing action by vavuum pump makes the active particle in the discharge tube flow through membrane module; According to the kind of membrane module and the position of film needs modification, regulate the flow direction of each three-way control valve control active particle in membrane module, realize plasma surface modification to whole membrane module; The mobile concrete direction of active particle in different membrane modules is:
When the film inner surface of hollow fiber film assembly, tubular film assembly, capillary-pipe film assembly is carried out modification, by regulating each three-way control valve, control active particle stream advances from the axial admission/liquid hole (being the tube side inlet) of membrane module, through going out from axially going out gas/liquid hole (being the tube side outlet) behind the membrane module;
When the film outer surface of hollow fiber film assembly, tubular film assembly, capillary-pipe film assembly is carried out modification, by regulating each three-way control valve, control active particle stream enters gas/liquid hole (being the shell side inlet) from the side direction of membrane module and advances, and goes out through going out gas/liquid hole (being the shell side outlet) from side direction behind the membrane module;
When film inner surface, outer surface and the fenestra of hollow fiber film assembly, tubular film assembly, capillary-pipe film assembly carried out modification simultaneously, by regulating each three-way control valve, control active particle stream advances from the axial admission/liquid hole (being the tube side inlet) of membrane module, goes out through going out gas/liquid hole (being the shell side outlet) from side direction behind the membrane module;
When the one side of plate film assembly was carried out modification, by regulating each three-way control valve, control active particle stream entered the gas/liquid hole from the side direction of membrane module and advances, and goes out through going out the gas/liquid hole from side direction behind the membrane module;
When the upper surface of plate film assembly and fenestra were carried out modification simultaneously, by regulating each three-way control valve, control active particle stream entered the gas/liquid hole from the side direction of membrane module and advances, and goes out from axially going out the gas/liquid hole through behind the membrane module.
Wherein, active particle is identical with the vavuum pump suction time discharge time in discharge tube, is 5～1200s, is preferably 10～300s;
Radio-frequency power 10～1000W in the discharge tube is preferably 40～300W;
The air inlet air pressure of membrane module is 0.5～100Pa, is preferably 2～50Pa.
Beneficial effect
The utility model contrast prior art has the following advantages:
(1) biggest advantage is to modify on overall size membrane module, has broken through the limitation that prior art can only be modified individual flat sheet membrane or single tubular membrane, thereby has improved efficient greatly.
(2) existing technology once can only be modified at the surface of flat sheet membrane or the outer surface of tubular film, and the utility model can carry out bulk modified targetedly to the inside and outside surface and the hole wall of film, particularly can also modify the hole wall of inner surface, hole wall and the flat sheet membrane of tubular film with membrane module integral body, and well-known be that the specific area of hole wall is more much bigger than the external surface area of film.
(3) owing to the free radical in the plasma had than electronics and longer life-span of ion, therefore, by plasma is drawn discharge tube, can utilize the film surface in high concentration, the long-life radical pair membrane module to modify, can reduce the damage that the bombardment of sample is caused owing to high energy active particles such as electronics, ions, help controlling goal response, particularly strengthen the chemical reaction that free radical causes.
Description of drawings
Fig. 1 carries out bulk modified installation drawing to a kind of remote plasma that utilizes of the present utility model to membrane module;
Wherein, 1-air accumulator; The 2-pressure-reducing valve; The 3-flow controller; The 4-discharge tube; The 5-inductance coil; The 6-radio frequency adaptation; The 7-radio-frequency power supply; The 8-vacuum meter; 9-three-way control valve A; The 10-membrane module; 11-three-way control valve B; The 12-vavuum pump; 101-axial admission/liquid hole; The 102-side direction is entered the gas/liquid hole; The 103-side direction goes out the gas/liquid hole; 104-axially goes out the gas/liquid hole.
The specific embodiment
Below in conjunction with drawings and Examples content of the present utility model is described further.
Embodiment 1
A kind of remote plasma that utilizes of the present utility model carries out the whole device of modifying to membrane module, as shown in Figure 1, comprise vavuum pump 12, membrane module 10, discharge tube 4, air accumulator 1, be wrapped in the inductance coil 5 on the discharge tube, the radio frequency adaptation 6 that is connected with inductance coil and radio-frequency power supply 7, the air admission hole of discharge tube 4 is connected with air accumulator 1 with flow controller 3 by pressure-reducing valve 2, and the pipeline between discharge tube 4 and the membrane module 10 is provided with vacuum meter 8; The venthole of discharge tube 4 advances gas/liquid hole 102 pipelines with the axial admission/liquid hole 101 of membrane module air inlet one side with side direction respectively by three-way control valve 9 and links to each other, and the give vent to anger gas/liquid hole 104 that axially goes out of a side of membrane module goes out gas/liquid hole 103 with side direction and links to each other with vavuum pump 12 pipelines by three-way control valve 11 simultaneously.
Adopt this device that the hollow fiber film assembly of polytetrafluoroethylmaterial material is carried out modifying inner surface: to regulate three-way control valve A9, the venthole of discharge tube 4 is opened to the axial admission/liquid hole 101 of membrane module 10, and the venthole of discharge tube 4 enters gas/liquid hole 102 to the side direction of membrane module 10 and closes; Regulate three-way control valve B11, the gas/liquid hole 104 that axially goes out of membrane module 10 is opened to vavuum pump 12, the side direction of membrane module 10 goes out gas/liquid hole 103 and closes to vavuum pump 12; The non-polymerization gas that being used to of storing in the air accumulator 1 produces plasma is argon gas; By regulating the flow controller 3 of vavuum pump 12 and discharge tube 4 front ends, make the air pressure in discharge tube 4 exits remain on 20Pa; Non-polymerization gas by plasma exciatiaon, generates various active ions such as ion, excited state molecule, free radical, radio-frequency power 80W in discharge tube 4; Under the swabbing action of vavuum pump, these active particles flow into from the axial admission/liquid hole 101 of membrane module 10, flow out from the gas/liquid hole 104 that axially goes out of membrane module 10, and be 2min discharge time, thereby realize the modification to the inner surface of hollow fiber film assembly.
A kind of remote plasma that utilizes of the present utility model carries out the whole device of modifying to membrane module, and structure adopts this device that the hollow fiber film assembly of polyvinylidene fluoride material is carried out the outer surface modification with embodiment 1:
Regulate three-way control valve A9, the venthole of discharge tube 4 is closed to the axial admission/liquid hole 101 of membrane module 10, the venthole of discharge tube 4 is opened to the logical gas/liquid hole 102 of the side direction of membrane module 10; Regulate three-way control valve B11, the gas/liquid hole 104 that axially goes out of membrane module 10 is closed to vavuum pump 12, the side direction of membrane module 10 goes out gas/liquid hole 103 and opens to vavuum pump 12; The non-polymerization gas that being used to of storing in the air accumulator 1 produces plasma is nitrogen; By regulating the flow controller 3 of vavuum pump 12 and discharge tube 4 front ends, make the air pressure in discharge tube 4 exits remain on 15Pa; Non-polymerization gas by plasma exciatiaon, generates various active ions such as ion, excited state molecule, free radical, radio-frequency power 70W in discharge tube 4; Under the swabbing action of vavuum pump, these active particles enter gas/liquid hole 102 from the side direction of membrane module 10 and flow into, and go out gas/liquid hole 103 from the side direction of membrane module 10 and flow out, and be 4min discharge time, thereby realize the modification to the outer surface of hollow fiber film assembly.
A kind of remote plasma that utilizes of the present utility model carries out the whole device of modifying to membrane module, structure is with embodiment 1, adopt this device that the hollow fiber film assembly integral body of polypropylene material is carried out inside and outside surface and fenestra modification simultaneously: to regulate three-way control valve A9, the venthole of discharge tube 4 is opened to the axial admission/liquid hole 101 of membrane module 10, and the venthole of discharge tube 4 enters gas/liquid hole 102 to the side direction of membrane module 10 and closes; Regulate three-way control valve B11, the gas/liquid hole 104 that axially goes out of membrane module 10 is closed to vavuum pump 12, the side direction of membrane module 10 goes out gas/liquid hole 103 and opens to vavuum pump 12; The non-polymerization gas that being used to of storing in the air accumulator 1 produces plasma is ammonia; By regulating the flow controller 3 of vavuum pump 12 and discharge tube 4 front ends, make the air pressure in discharge tube 4 exits remain on 25Pa; Non-polymerization gas by plasma exciatiaon, generates various active ions such as ion, excited state molecule, free radical, radio-frequency power 85W in discharge tube 4; Under the swabbing action of vavuum pump, these active particles flow into from the axial admission/liquid hole 101 of membrane module 10, go out 103 outflows of gas/liquid hole from the side direction of membrane module 10, be 3min discharge time, thereby realize inner surface, outer surface and the fenestra modification simultaneously to hollow fiber film assembly.
Embodiment 4
A kind of remote plasma that utilizes of the present utility model carries out the whole device of modifying to membrane module, structure is with embodiment 1, adopt this device that the plate and frame module of the polythene material of 2 horizontal positioned is carried out the upper surface modification: to regulate three-way control valve A9, the venthole of discharge tube 4 is closed to the axial admission/liquid hole 101 of membrane module 10, and the venthole of discharge tube 4 is opened to the side direction feed liquor/pore 102 of membrane module 10; Regulate three-way control valve B11, the gas/liquid hole 104 that axially goes out of membrane module 10 is closed to vavuum pump 12, the side direction of membrane module 10 goes out gas/liquid hole 103 and opens to vavuum pump 12; The non-polymerization gas that being used to of storing in the air accumulator 1 produces plasma is CO
2By regulating the flow control valve of vavuum pump 12 and discharge tube 4 front ends, make the air pressure in discharge tube 4 exits remain on 30Pa; Non-polymerization gas by plasma exciatiaon, generates various active ions such as ion, excited state molecule, free radical, radio-frequency power 50W in discharge tube 4; Under the swabbing action of vavuum pump, these active particles flow into from the side direction feed liquor/pore 102 of membrane module 10, go out gas/liquid hole 103 from the side direction of membrane module 10 and flow out, and be 3min discharge time, thereby realize the modification to the upper surface of plate and frame module.
A kind of remote plasma that utilizes of the present utility model carries out the whole device of modifying to membrane module, structure is with embodiment 1, adopt this device that the plate and frame module of the polythene material of 4 horizontal positioned is carried out film upper surface and fenestra modification simultaneously: to regulate three-way control valve A9, make the venthole of discharge tube 4 advance 102 unlatchings of gas/liquid hole to the side direction of membrane module 10, the venthole of discharge tube 4 is closed to the axial admission/liquid hole 101 of membrane module 10; Regulate three-way control valve B11, the gas/liquid hole 104 that axially goes out of membrane module 10 is opened to vavuum pump 12, the side direction of membrane module 10 goes out gas/liquid hole 103 and closes to vavuum pump 12; The non-polymerization gas that being used to of storing in the air accumulator 1 produces plasma is air; By regulating the flow control valve of vavuum pump 12 and discharge tube 4 front ends, make the air pressure in discharge tube 4 exits remain on 20Pa; Non-polymerization gas by plasma exciatiaon, generates various active ions such as ion, excited state molecule, free radical, radio-frequency power 75W in discharge tube 4; Under the swabbing action of vavuum pump, these active particles enter gas/liquid hole 102 from the side direction of membrane module 10 and flow into, flow out from the gas/liquid hole 104 of axially going out of membrane module 10, be 4min discharge time, thus modification when realizing to plate and frame module inner surface and fenestra.
Claims (3)
1. one kind is utilized remote plasma that membrane module is carried out the whole device of modifying, comprise vavuum pump, discharge tube, air accumulator, be wrapped in the inductance coil on the discharge tube, the radio circuit that is connected with inductance coil, the air admission hole of discharge tube is connected with the air accumulator pipeline with flowmeter by flow control valve, and the air admission hole of discharge tube is provided with vacuum meter; It is characterized in that: also comprise membrane module, the venthole of discharge tube advances gas/liquid hole pipeline with the axial admission/liquid hole of membrane module air inlet one side with side direction respectively by three-way control valve and links to each other, and the give vent to anger gas/liquid hole that axially goes out of a side of membrane module goes out the gas/liquid hole with side direction and links to each other with the vavuum pump pipeline by three-way control valve simultaneously;
Wherein, the distance of the pipeline between described discharge tube and the membrane module is 0～40cm;
Described membrane module is hollow fiber film assembly, tubular film assembly, capillary-pipe film assembly, plate film assembly;
The non-polymerization gas that being used to of storing in the described air accumulator produces plasma is air, CO
2, nitrogen, ammonia, argon gas, oxygen, hydrogen, steam.
2. a kind of remote plasma that utilizes as claimed in claim 1 carries out the whole device of modifying to membrane module, and it is characterized in that: the film in the described membrane module is the tubulose inoranic membrane that polymeric membrane, surface recombination have macromolecule member material.
3. a kind of remote plasma that utilizes as claimed in claim 1 carries out the whole device of modifying to membrane module, it is characterized in that: the vacuum meter of described discharge tube air admission hole setting also can be arranged on the pipeline between discharge tube and the membrane module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200733644U CN202028342U (en) | 2011-03-18 | 2011-03-18 | Device for overall modifying membrane module by long-range plasmas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200733644U CN202028342U (en) | 2011-03-18 | 2011-03-18 | Device for overall modifying membrane module by long-range plasmas |
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| CN202028342U true CN202028342U (en) | 2011-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179175A (en) * | 2011-03-18 | 2011-09-14 | 北京理工大学 | Device and method for integrally modifying membrane module by using remote plasma |
-
2011
- 2011-03-18 CN CN2011200733644U patent/CN202028342U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179175A (en) * | 2011-03-18 | 2011-09-14 | 北京理工大学 | Device and method for integrally modifying membrane module by using remote plasma |
| CN102179175B (en) * | 2011-03-18 | 2013-05-22 | 北京理工大学 | Device and method for integrally modifying membrane module by using remote plasma |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20130318 |