CN102580533B - Experiment system and method for tangential filtration of high pressure resistant flat reverse osmosis (RO) membrane - Google Patents
Experiment system and method for tangential filtration of high pressure resistant flat reverse osmosis (RO) membrane Download PDFInfo
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- CN102580533B CN102580533B CN2012100381659A CN201210038165A CN102580533B CN 102580533 B CN102580533 B CN 102580533B CN 2012100381659 A CN2012100381659 A CN 2012100381659A CN 201210038165 A CN201210038165 A CN 201210038165A CN 102580533 B CN102580533 B CN 102580533B
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- 238000001914 filtration Methods 0.000 title claims abstract description 27
- 238000002474 experimental method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000012528 membrane Substances 0.000 title abstract description 19
- 238000001223 reverse osmosis Methods 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000012141 concentrate Substances 0.000 claims description 24
- 238000010992 reflux Methods 0.000 claims description 19
- 238000009295 crossflow filtration Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000011160 research Methods 0.000 abstract description 7
- 238000005374 membrane filtration Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 6
- 238000001764 infiltration Methods 0.000 description 3
- 238000001471 micro-filtration Methods 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
The invention discloses an experiment system and an experiment method for tangential filtration of a high pressure resistant flat reverse osmosis (RO) membrane. The experiment system comprises a material feeding pot, a pressure pump, a flat RO membrane filtration device, a storage pot, a pressure gauge, an adjustment valve and a safety valve. The experiment method comprises the following steps of: (1) arranging an RO membrane between a top plate and a base plate, and fastening the top plate and the base plate together through bolts; (2) connecting equipment; (3) keeping the safety valve closed and the adjustment valve opened, and starting the high-pressure pump; (4) gradually turning down the opening degree of the adjustment valve, so that the liquid feeding pressure of the flat RO membrane filtration device is raised until material liquid flowing through the membrane flows out; and (5) finishing collecting the filtered material liquid, stopping the pump, and opening the adjustment valve and the safety valve to release pressure. The experiment system is feasible in a laboratory and can bear high pressure required by tangential filtration of the flat RO membrane so as to finish an RO filtration experiment; and according to the experiment method, the pollution situation of the membrane in each filtration stage can be observed conveniently, and researches on a pollution control technology is facilitated.
Description
Technical field
The present invention relates to flat RO membrane filtration experimental provision, relate in particular to a kind of experimental system of high pressure resistant flat RO film tangential flow filtration, be the filtration system of feasible flat counter-infiltration (RO) film in laboratory, and a kind ofly bearing the experimental technique that completes counter-infiltration tangential flow filtration medium under high pressure.
Background technology
At present, known RO film filter adopts rolled membrane module mostly, selects web-like RO film, and it is inserted in high pressure resistant filter housing cylindraceous and forms rolled membrane module.Rolled membrane module, owing to being enclosed in filter housing, can only complete the separating and filtering to medium, is unfavorable for studying at any time the generation that the situation of observing the film surface comes controlling diaphragm to pollute.Only after rolled membrane module is disassembled out, can get film and observe, but this means that membrane module scraps.Because the autonomy-oriented proportion of production of RO film product is quite low, rolled membrane module (the especially film of special property on research application) somewhat expensive, many researchers can't the work of support membrane Pollution Study spending, this has also limited the development of China's membrane technology and membrane material.
Someone adopts small-sized rolled membrane module to carry out laboratory research, but still can't observe at any time pollution situation on film.Also someone adopts flat dead-end filtration device to carry out the filtration experiment of ultrafiltration under low pressure, micro-filtration, and its defect has two.At first the dead-end filtration technology is eliminated by case history application, show generally employing be tangential flow filtration to slow down the concentration polarization effect, if adopt again dead-end filtration to carry out scientific research, do not conform to reality; Secondly, existing flat ultrafiltration, micro-filtration filter generally are made of plastics, and it can only under low pressure test (maximum 0.5Mpa), and the filtration of carrying out reverse osmosis membrane needs the pressure condition of 1-2Mpa at least, the obvious bearing capacity deficiency of this series products.
In addition, existing flat filter can't freely change and adjust the speed of filtering according to the intensity of pressure, brings a lot of inconvenience to experiment, also the accuracy of impact experiment.
Summary of the invention
For the prior art above shortcomings, purpose of the present invention just is to provide a kind of experimental system of high pressure resistant flat RO film tangential flow filtration, a kind of experimental system that can bear RO flat sheet membrane tangential flow filtration required high pressure feasible in laboratory, this system has comprised the required equipment of high-pressure filteration, can bear high pressure and complete the osmosis filtration test, according to this experimental technique, also can easily observe and filter pollution condition on each stage film, facilitate the research of pollution control technology.
Another object of the present invention also is to improve a kind of experimental technique of high pressure resistant flat RO film tangential flow filtration.
To achieve these goals, the technical solution used in the present invention is such: a kind of experimental system of high pressure resistant flat RO film tangential flow filtration comprises:
Head tank, be used to holding feed liquid;
Compression pump, be located between head tank and flat RO film filter, its two ends are connected with flat RO film filter with head tank by pipeline, are delivered to flat RO film filter with the feed liquid by head tank, provide simultaneously filtration experiment required high pressure;
Flat RO film filter, for separating of the material in feed liquid, and the separating liquid obtained after filtering; See through liquid and be delivered to the holding vessel storage by pipeline, concentrate is by the defeated head tank that is back to of reflux line;
Holding vessel, be used to holding the liquid that sees through of separating;
Pressure gauge, this Pressure gauge is 2, the first Pressure gauge is installed on the pipeline between compression pump and flat RO film filter, the second Pressure gauge is installed on the reflux line between flat RO film filter and head tank, the real-time pressure of the system that is used to indicate in operating process, guarantee experimental system safety;
Control valve, be installed on the reflux line between flat RO film filter and head tank, and between the second Pressure gauge and head tank, thereby be used to the effective pressure of the flow regulating system of regulating concentrate;
Safety valve, the one end is connected with head tank, and the other end is connected with the pipeline between compression pump and the first Pressure gauge, for when system pressure is unbalance, discharging too high pressure.
Further, described flat RO film filter comprises top board, base plate and RO diaphragm, and described top board and base plate removably connect; The correspondence position of the face fitted at base plate and top board is provided with rectangular recess, forms gallery; Described RO diaphragm is located between top board and base plate, and the gallery on top board and base plate is separated;
The gallery outside of base plate is provided with inner seal ring groove and external seal ring recess around it, and correspondence is provided with inner seal ring and exterior seal ring in inside and outside seal groove; In the gallery of base plate, be provided with the water inlet slit and the concentrate water outlet slit that are parallel to each other; The sidewall of base plate is provided with inlet opening and the concentrate apopore be connected with water inlet slit and concentrate water outlet slit respectively; On the base plate between inside and outside seal groove, be provided with lead, described lead is positioned at the Si Jiaochu of external seal ring recess inboard;
On four jiaos of described RO diaphragm, be respectively equipped with a through hole, by the lead that through hole is enclosed within respectively to correspondence position, realizing installation and the location of RO diaphragm;
Top board is provided with the upper seal groove corresponding with the external seal ring recess on base plate, in upper seal groove, is provided with sealing ring; The gallery of top board middle part is provided with through liquid water outlet slit, and described to see through liquid water outlet slit parallel with concentrate water outlet slit with the water inlet slit in the base plate gallery, on the sidewall of top board, be provided with see through that liquid water outlet slit is connected through the liquid apopore; On top board, be provided with the lead slot corresponding with lead; Base plate and top board are by lead and lead slot location;
The corresponding screw that offers also at four jiaos of places of base plate and top board, base plate and top board pass through bolted together.
Further, described top board and base plate adopt steel plate to make.Thereby guaranteed the ability that whole flat RO film filter bears high pressure.
Further, in the gallery of base plate, also be provided with pad.By laying pad, change the sectional area of base plate runner, thereby can carry out the membrane filtration test under different tangential flow velocitys.
A kind of experimental technique of high pressure resistant flat RO film tangential flow filtration, adopt above-mentioned experimental system, comprises the steps:
1) between top board and base plate, settle the RO diaphragm, and with bolt, top board and base plate are tightened together;
2) connect each equipment: head tank utilizes device for cleaning pipeline excess pressure pump to be connected with the inlet opening of flat RO film filter, the concentrate apopore of flat RO film filter is by the defeated head tank that is back to of reflux line, and the liquid apopore that sees through of flat RO film filter is connected with storage tank by pipeline; The first Pressure gauge is installed on the pipeline between compression pump and flat RO film filter, and the second Pressure gauge is installed on the reflux line between flat RO film filter and head tank; Control valve is installed on the reflux line between flat RO film filter and head tank, and between the second Pressure gauge and head tank; One end of safety valve is connected with head tank, and the other end is connected with the pipeline between compression pump and the first Pressure gauge;
3) keep safety valve to close, control valve is opened, and starts high-pressure pump;
4) progressively turn the open degree of control valve down, the inlet hydraulic of flat RO film filter is raise until the feed liquid of process diaphragm flows out;
5) feed liquid completed after filtration is collected, termination of pumping, and control valve and safety valve are all opened pressure release.
After waiting to test, by the bolt of dismantling on four jiaos of flat RO film filters, flat RO film filter is taken apart, thereby the RO diaphragm is taken off to observe its contaminated degree.Because device is flat, thereby the RO diaphragm removed can be not damaged, continues to use in the situation that pollution level does not affect, and the RO diaphragm can be reused.
Compared with prior art, the invention has the advantages that: the experimental system of complete high pressure resistant flat RO film tangential flow filtration, the needs of various experimental facilities have fully been met, can bear high pressure and complete the experimental analysis of counter-infiltration flat sheet membrane filter medium, safe and reliable, reduce cost, simple;
This flat filtration system can effectively be simulated the mode of operation of the existing tangential filtration technique of generally applying, and makes the research work based on this cover filtration system that higher practical significance and reference value be arranged;
Processing slit and gallery in filter, guarantee that liquid flow is unobstructed, even, and in gallery, can select the pad of different-thickness to lay, and according to method of calculating flux, reached the purpose of free change, adjustment tangential flow filtration filtering velocity;
According to this experimental technique can be easy start and stop experiments, the dismounting diaphragm is convenient, the service condition that is easy to observe film is especially filtered pollution condition on each stage film, facilitates the research of pollution control technology.
The accompanying drawing explanation
Fig. 1 is the structured flowchart of experimental system of the present invention;
Fig. 2 is the decomposition texture schematic diagram of flat RO film filter;
Fig. 3 is the top view of base plate;
The side view of Fig. 4 base plate;
Fig. 5 is the cutaway view of Fig. 3 along A-A line;
Fig. 6 is the upward view of top board;
Fig. 7 is the side view of top board;
Fig. 8 is the cutaway view of Fig. 6 along B-B line.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment: referring to Fig. 1 to Fig. 8, a kind of experimental system of high pressure resistant flat RO film tangential flow filtration comprises:
Compression pump 2, be located between head tank and flat RO film filter, its two ends are connected with flat RO film filter with head tank by pipeline, are delivered to flat RO film filter with the feed liquid by head tank, provide simultaneously filtration experiment required high pressure;
Flat RO film filter 3, for separating of the material in feed liquid, and the separating liquid obtained after filtering; See through liquid (namely seeing through the liquid of RO film) and be delivered to the holding vessel storage by pipeline, concentrate (namely not seeing through the liquid of RO film) is by the defeated head tank that is back to of reflux line;
Holding vessel 4, be used to holding the feed liquid that sees through film of separating;
Pressure gauge, this Pressure gauge is 2, the first Pressure gauge 51 is installed on the pipeline between compression pump and flat RO film filter, the second Pressure gauge 52 is installed on the reflux line between flat RO film filter and head tank, the real-time pressure of the system that is used to indicate in operating process, guarantee experimental system safety;
Described flat RO film filter 3 comprises top board 8, base plate 9 and RO diaphragm 10, and described top board 8 and base plate 9 removably connect; The correspondence position of the face fitted at base plate 9 and top board 8 is provided with rectangular recess, forms gallery 11; Described RO diaphragm 10 is located between top board and base plate, and the gallery on top board and base plate is separated; Described top board and base plate adopt steel plate to make, thereby have guaranteed the ability that whole flat RO film filter bears high pressure.
The gallery outside of base plate 9 is provided with inner seal ring groove 12 and external seal ring recess 13 around it, and correspondence is provided with inner seal ring 14 and exterior seal ring 15 in inside and outside seal groove; In the gallery of base plate, be provided with the water inlet slit 16 and the concentrate water outlet slit 17 that are parallel to each other; The sidewall of base plate is provided with inlet opening 18 and the concentrate apopore 19 be connected with water inlet slit and concentrate water outlet slit respectively; During experiment, inlet opening is connected with the water side of high-pressure pump by pipeline, and the concentrate apopore is connected with head tank by reflux line.
On the base plate between inside and outside seal groove, be provided with lead 20, described lead 20 is positioned at the Si Jiaochu of external seal ring recess inboard; On four jiaos of described RO diaphragm 10, be respectively equipped with a through hole 21, by installation and the location of realizing RO diaphragm 10 on the lead 20 that through hole 21 is enclosed within respectively to correspondence position.
On top board, be provided with the lead slot 26 corresponding with lead; Base plate and top board are by lead and lead slot location; The corresponding screw 27 that offers also at four jiaos of places of base plate and top board, base plate and top board recycle bolted together after by lead and lead slot, locating; Be bolted, can meet the pressure that device integral body need be born, and convenient disassembly.
During the system operation, can pass through the pad of pad different-thickness specification in the gallery of base plate, thereby change the sectional area of base plate runner, the shape of described pad is consistent with the gallery shape, and feed liquid is passed through.Under the certain condition of flow, can reach like this purpose that changes tangential flow velocity, thereby can carry out the membrane filtration test under different tangential flow velocitys.
The course of work: feed liquid is entered by inlet opening, upwards pours in the effective gallery on base plate and to the other end and flows from the water inlet slit.Due to the diaphragm interception, the liquid that can't see through will enter at the other end of gallery concentrate water outlet slit downwards, and finally from the concentrate apopore, flow out.The liquid that sees through diaphragm enters the gallery on top board, is pooled to through in liquid water outlet slit, flows out from seeing through the liquid delivery port.
A kind of experimental technique of high pressure resistant flat RO film tangential flow filtration, comprise the steps:
1) between top board and base plate, settle the RO diaphragm, and with bolt, top board and base plate are tightened together;
2) connect each equipment: head tank utilizes device for cleaning pipeline excess pressure pump to be connected with the inlet opening of flat RO film filter, the concentrate apopore of flat RO film filter is by the defeated head tank that is back to of reflux line, and the liquid apopore that sees through of flat RO film filter is connected with storage tank by pipeline; The first Pressure gauge is installed on the pipeline between compression pump and flat RO film filter, and the second Pressure gauge is installed on the reflux line between flat RO film filter and head tank; Control valve is installed on the reflux line between flat RO film filter and head tank, and between the second Pressure gauge and head tank; One end of safety valve is connected with head tank, and the other end is connected with the pipeline between compression pump and the first Pressure gauge;
3) keep safety valve to close, control valve is opened, and starts high-pressure pump;
4) progressively turn the open degree of control valve down, the inlet hydraulic of flat RO film filter is raise until the feed liquid of process diaphragm flows out;
5) feed liquid completed after filtration is collected, termination of pumping, and control valve and safety valve are all opened pressure release.
After waiting to test, by the bolt of dismantling on four jiaos of flat RO film filters, flat RO film filter is taken apart, thereby the RO diaphragm is taken off to observe its contaminated degree.Because device is flat, thereby the RO diaphragm removed can be not damaged, continues to use in the situation that pollution level does not affect, and the RO diaphragm can be reused.
Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention but not the restriction technologies scheme, although the applicant has been described in detail the present invention with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those are modified or are equal to replacement technical scheme of the present invention, and do not break away from aim and the scope of the technical program, all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. the experimental system of a high pressure resistant flat RO film tangential flow filtration is characterized in that: comprising:
Head tank, be used to holding feed liquid;
Compression pump, be located between head tank and flat RO film filter, its two ends are connected with flat RO film filter with head tank by pipeline, are delivered to flat RO film filter with the feed liquid by head tank, provide simultaneously filtration experiment required high pressure;
Flat RO film filter, for separating of the material in feed liquid, and the separating liquid obtained after filtering; See through liquid and be delivered to the holding vessel storage by pipeline, concentrate is by the defeated head tank that is back to of reflux line;
Holding vessel, be used to holding the liquid that sees through of separating;
Pressure gauge, this Pressure gauge is 2, the first Pressure gauge is installed on the pipeline between compression pump and flat RO film filter, the second Pressure gauge is installed on the reflux line between flat RO film filter and head tank, the real-time pressure of the system that is used to indicate in operating process, guarantee experimental system safety;
Control valve, be installed on the reflux line between flat RO film filter and head tank, and between the second Pressure gauge and head tank, thereby be used to the effective pressure of the flow regulating system of regulating concentrate;
Safety valve, the one end is connected with head tank, and the other end is connected with the pipeline between compression pump and the first Pressure gauge, for when system pressure is unbalance, discharging too high pressure;
Described flat RO film filter comprises top board, base plate and RO diaphragm, and described top board and base plate removably connect; The correspondence position of the face fitted at base plate and top board is provided with rectangular recess, forms gallery; Described RO diaphragm is located between top board and base plate, and the gallery on top board and base plate is separated;
The gallery outside of base plate is provided with inner seal ring groove and external seal ring recess around it, and correspondence is provided with inner seal ring and exterior seal ring in inside and outside seal groove; In the gallery of base plate, be provided with the water inlet slit and the concentrate water outlet slit that are parallel to each other; The sidewall of base plate is provided with inlet opening and the concentrate apopore be connected with water inlet slit and concentrate water outlet slit respectively; On the base plate between inside and outside seal groove, be provided with lead, described lead is positioned at the Si Jiaochu of external seal ring recess inboard;
On four jiaos of described RO diaphragm, be respectively equipped with a through hole, by the lead that through hole is enclosed within respectively to correspondence position, realizing installation and the location of RO diaphragm;
Top board is provided with the upper seal groove corresponding with the external seal ring recess on base plate, in upper seal groove, is provided with sealing ring; The gallery of top board middle part is provided with through liquid water outlet slit, and described to see through liquid water outlet slit parallel with concentrate water outlet slit with the water inlet slit in the base plate gallery, on the sidewall of top board, be provided with see through that liquid water outlet slit is connected through the liquid apopore; On top board, be provided with the lead slot corresponding with lead; Base plate and top board are by lead and lead slot location;
The corresponding screw that offers also at four jiaos of places of base plate and top board, base plate and top board pass through bolted together.
2. the experimental system of a kind of high pressure resistant flat RO film tangential flow filtration according to claim 1 is characterized in that: described top board and base plate adopt steel plate to make.
3. the experimental system of a kind of high pressure resistant flat RO film tangential flow filtration according to claim 1, is characterized in that: in the gallery of base plate, also be provided with pad.
4. the experimental technique of a high pressure resistant flat RO film tangential flow filtration, adopt the described experimental system of arbitrary claim in claims 1 to 3, it is characterized in that: comprise the steps:
1) between top board and base plate, settle the RO diaphragm, and with bolt, top board and base plate are tightened together;
2) connect each equipment: head tank utilizes device for cleaning pipeline excess pressure pump to be connected with the inlet opening of flat RO film filter, the concentrate apopore of flat RO film filter is by the defeated head tank that is back to of reflux line, and the liquid apopore that sees through of flat RO film filter is connected with storage tank by pipeline; The first Pressure gauge is installed on the pipeline between compression pump and flat RO film filter, and the second Pressure gauge is installed on the reflux line between flat RO film filter and head tank; Control valve is installed on the reflux line between flat RO film filter and head tank, and between the second Pressure gauge and head tank; One end of safety valve is connected with head tank, and the other end is connected with the pipeline between compression pump and the first Pressure gauge;
3) keep safety valve to close, control valve is opened, and starts high-pressure pump;
4) progressively turn the open degree of control valve down, the inlet hydraulic of flat RO film filter is raise until the feed liquid of process diaphragm flows out;
5) feed liquid completed after filtration is collected, termination of pumping, and control valve and safety valve are all opened pressure release.
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| CN2012100381659A CN102580533B (en) | 2012-02-20 | 2012-02-20 | Experiment system and method for tangential filtration of high pressure resistant flat reverse osmosis (RO) membrane |
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| CN2012100381659A CN102580533B (en) | 2012-02-20 | 2012-02-20 | Experiment system and method for tangential filtration of high pressure resistant flat reverse osmosis (RO) membrane |
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| CN104673666A (en) * | 2015-03-10 | 2015-06-03 | 华东理工大学 | Micro tangential flow filtration simulation device |
| CN104826498B (en) * | 2015-04-30 | 2017-02-22 | 天津大学 | Multiuse separation membrane evaluating apparatus |
| CN106000113B (en) * | 2016-07-12 | 2018-10-09 | 山东省科学院海洋仪器仪表研究所 | A kind of separating property experimental provision of the cross-flow of small area filter membrane and pattern of shutting off |
| CN107754613A (en) * | 2017-11-16 | 2018-03-06 | 浙江益地膜设备有限公司 | A kind of miniature film separate metering system and method for testing |
| CN109925886B (en) * | 2019-04-09 | 2021-10-01 | 吕剑阳 | Application method and device of internal pressure type hollow fiber membrane component |
| CN113443697B (en) * | 2021-07-09 | 2022-10-25 | 哈尔滨工业大学 | Continuous flow device for catalyzing ozone oxidation by multistage membrane module |
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| CN101125281A (en) * | 2007-06-12 | 2008-02-20 | 天津膜天膜工程技术有限公司 | Immersion type hollow fiber membrane separator and its running process |
| TW201100161A (en) * | 2009-06-30 | 2011-01-01 | Asahi Kasei Chemicals Corp | Method of filtration and membrane filtration equipment |
| CN202410521U (en) * | 2012-02-20 | 2012-09-05 | 重庆大学 | Experiment system for tangentially filtering high-pressure-resistant flat-plate RO membrane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125281A (en) * | 2007-06-12 | 2008-02-20 | 天津膜天膜工程技术有限公司 | Immersion type hollow fiber membrane separator and its running process |
| TW201100161A (en) * | 2009-06-30 | 2011-01-01 | Asahi Kasei Chemicals Corp | Method of filtration and membrane filtration equipment |
| CN202410521U (en) * | 2012-02-20 | 2012-09-05 | 重庆大学 | Experiment system for tangentially filtering high-pressure-resistant flat-plate RO membrane |
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Inventor after: Zeng Xiaolan Inventor after: Han Le Inventor after: Ding Wenchuan Inventor after: Zhang Qin Inventor after: Li Zhong Inventor after: Liu Jiandong Inventor after: Liu Jiao Inventor before: Zeng Xiaolan Inventor before: Han Le Inventor before: Ding Wenchuan Inventor before: Li Zhong Inventor before: Liu Jiandong Inventor before: Liu Jiao |
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