CN111249915B - Central tube of high-pressure STRO (short tandem oxidation) membrane assembly - Google Patents
Central tube of high-pressure STRO (short tandem oxidation) membrane assembly Download PDFInfo
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- CN111249915B CN111249915B CN202010248686.1A CN202010248686A CN111249915B CN 111249915 B CN111249915 B CN 111249915B CN 202010248686 A CN202010248686 A CN 202010248686A CN 111249915 B CN111249915 B CN 111249915B
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- China
- Prior art keywords
- water producing
- central tube
- membrane assembly
- producing holes
- holes
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- 239000012528 membrane Substances 0.000 title claims abstract description 29
- 230000003647 oxidation Effects 0.000 title description 2
- 238000007254 oxidation reaction Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 10
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims description 6
- 239000012986 chain transfer agent Substances 0.000 claims description 6
- -1 methacryloxypropyl Chemical group 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000005062 Polybutadiene Substances 0.000 claims description 3
- 238000012662 bulk polymerization Methods 0.000 claims description 3
- 239000012442 inert solvent Substances 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 claims description 3
- 150000002825 nitriles Chemical class 0.000 claims description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 3
- 229920002857 polybutadiene Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 5
- 229910020381 SiO1.5 Inorganic materials 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/10—Spiral-wound membrane modules
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a central tube of a high-pressure STRO membrane assembly, which is a hollow circular tube, wherein a plurality of support bosses are axially arranged on the inner wall of the central tube by using a modified ABS resin material, the support bosses are uniformly distributed along the circumferential direction, the concave part between two adjacent support bosses is a water producing flow passage, water producing holes are arranged on the water producing flow passage, the water producing holes are distributed in multiple layers along the axial direction of the central tube, the water producing holes of each layer are uniformly distributed along the circumferential direction, and the water producing holes of two adjacent layers are staggered. Compared with the prior art, the invention uses the central tube with reasonable mechanical structure design, and uses the modified ABS resin as the material for manufacturing the central tube, so that the central tube is impact-resistant, high-pressure-resistant, corrosion-resistant and fatigue-resistant under high pressure conditions, has higher mechanical strength and better processability, and ensures that the membrane component keeps good stability, sealing property and high-flux flow passage.
Description
Technical Field
The invention relates to the technical field of membrane assemblies, in particular to a central tube of a high-pressure STRO membrane assembly.
Background
In recent years, along with the discharge of national environmental protection policies, wastewater treatment discharge standards are higher and higher, and various advanced treatment technologies of high-difficulty wastewater treatment roll-type reverse osmosis membrane (STRO) components with high pollution resistance, high component pressure resistance, simple pretreatment requirements and the like are widely applied to garbage infiltration, high salt, high organic matters, high ammonia nitrogen and the like. The withstand voltage of the existing coiled reverse osmosis membrane component is generally within 9.0Mpa, and the operating pressure is within 8.0 Mpa. In practical application, in order to pursue higher concentration multiple, the running pressure needs to reach 16.0Mpa, and higher requirements are put on the strength of the assembly. Meanwhile, in order to enhance the adaptability to high-pollution water sources, higher requirements are also put forward on the aspect of the anti-pollution performance of the membrane component.
The central tube is an important component of a coiled reverse osmosis membrane assembly (STRO), and the central tube in the prior art is crushed or damaged due to the fact that the central tube cannot bear high pressure, so that various requirements on mechanical properties cannot be completely met, and stability and sealing performance of the membrane assembly cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a central tube of a high-pressure STRO membrane assembly with impact resistance, high pressure resistance, corrosion resistance and fatigue resistance, which ensures the mechanical property and the processing property of the membrane assembly and meets the requirements of good stability, sealing property and high flux flow passage of the membrane assembly under the high pressure condition.
In order to achieve the above object, the present invention provides the following solutions:
The invention discloses a central tube of a high-pressure STRO membrane assembly, which is a hollow circular tube, wherein a plurality of support bosses are axially arranged on the inner wall of the central tube, the support bosses are uniformly distributed along the circumferential direction, a concave part between two adjacent support bosses is a water producing flow passage, water producing holes are arranged on the water producing flow passage, the water producing holes are distributed in multiple layers along the axial direction of the central tube, the water producing holes of each layer are uniformly distributed along the circumferential direction, and the water producing holes of two adjacent layers are staggered.
Preferably, the central tube uses a modified ABS resin material, the modified ABS resin is prepared by a bulk polymerization method, and the preparation raw materials comprise monovinylarene monomer, vinyl unsaturated nitrile monomer, uncrosslinked butadiene rubber, initiator, inert solvent, POSS additive and POSS chain transfer agent;
The POSS additive has a chemical formula (Ph xR1-xSiO1.5)n;
the POSS chain transfer agent has a chemical formula (R' yR"1-ySiO1.5)m;
wherein Ph is phenyl, R is methacryloxypropyl, R' is isobutyl, R "is 3-mercaptopropyl, x=0.6 to 0.9, y=0 to 0.9, n=6, 8, 10 or 12, m=6, 8, 10 or 12.
Preferably, the number of the support bosses is six, and the number of the water producing holes of each layer is three.
Preferably, the diameter of the water producing hole is 2-3 mm, and the aperture ratio is 0.07-0.1%.
Preferably, the bottom of the water producing channel is arch-shaped.
Compared with the prior art, the invention has the following technical effects:
The invention uses the central tube with reasonable mechanical structure design, and uses the modified ABS resin as the material for manufacturing the central tube, so that the central tube is impact-resistant, high-pressure-resistant, corrosion-resistant and fatigue-resistant under high-pressure conditions, has higher mechanical strength and better processability, and ensures that the membrane component keeps good stability, sealing property and high-flux flow passage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of a central tube of the high pressure STRO membrane assembly of the present embodiment;
FIG. 2 is a transverse cross-sectional view of the center tube of the high pressure STRO membrane assembly of the present embodiment;
FIG. 3 is a longitudinal cross-sectional view of the center tube of the high pressure STRO membrane assembly of the present embodiment;
reference numerals illustrate: 1-supporting a boss; 2-a water production flow channel; 3-water producing holes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a central tube of a high-pressure STRO membrane assembly with impact resistance, high pressure resistance, corrosion resistance and fatigue resistance, which ensures the mechanical property and the processing property of the membrane assembly and meets the requirements of good stability, sealing property and high flux flow passage of the membrane assembly under the high pressure condition.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-3, this embodiment provides a center tube of a high pressure STRO membrane assembly, which is a hollow circular tube. A plurality of support bosses 1 are axially arranged on the inner wall of the central tube, and the support bosses 1 are uniformly distributed along the circumferential direction. The concave part between two adjacent support bosses 1 is a water producing channel 2, and a water producing hole 3 is arranged on the water producing channel 2. In order to improve the strength of the central tube, the water producing holes 3 in this embodiment are distributed in multiple layers along the axial direction of the central tube, the water producing holes 3 of each layer are uniformly distributed along the circumferential direction, and the water producing holes 3 of two adjacent layers are staggered.
Further, the center tube in this embodiment uses a modified ABS resin material (disclosed in CN110564104 a). The modified ABS resin is prepared by a bulk polymerization method, and the preparation raw materials comprise monovinylarene monomer, vinyl unsaturated nitrile monomer, uncrosslinked butadiene rubber, initiator, inert solvent, POSS additive and POSS chain transfer agent. POSS additives have the chemical formula (Ph xR1-xSiO1.5)n. POSS chain transfer agent has the chemical formula (R 'yR"1-ySiO1.5)m. Wherein Ph is phenyl, R is methacryloxypropyl, R' is isobutyl, R "is 3-mercaptopropyl, x=0.6 to 0.9, y=0 to 0.9, n=6, 8, 10 or 12, m=6, 8, 10 or 12).
The material has good processing performance, and each dimension can be ensured to be within an allowable tolerance in the manufacturing process, so that the tightness and the assembly requirement of the material with the STRO membrane assembly flange can be ensured. For example, the small clearance fit between the supporting boss 1 and the central pull rod of the STRO membrane assembly is ensured, so that the pull rod is convenient to assemble. In addition, the central tube manufactured by the material has the performances of impact resistance, high pressure resistance, corrosion resistance, fatigue resistance and the like, is not easy to deform under high pressure, can not lock the central pull rod, and can ensure the service life.
Further, in this embodiment, the number of the support bosses 1 is six, and the number of the water producing holes 3 in each layer is three, so that those skilled in the art can select other numbers of the support bosses 1 and the water producing holes 3 as required.
Specifically, in order to ensure that the flux is 40LMH under high pressure and the water production flow rate of a single water production joint is within 5m/s, the size of the water production hole 3 is 2-3 mm, and the range of the aperture ratio is 0.07-0.1%, so that the water production joint cannot be pressed and spanned due to large hole size, large aperture ratio or unreasonable position arrangement.
More specifically, the water producing flow channel 2 in this embodiment is in an outer arch shape, so that the material consumption can be reduced, the overall strength can be enhanced, and the water yield can be increased to generate back pressure under the condition of meeting the requirement of water yield and high pressure.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (4)
1. The central tube of the high-pressure STRO membrane assembly is characterized in that the central tube is a hollow circular tube, a plurality of supporting bosses are axially arranged on the inner wall of the central tube, the supporting bosses are uniformly distributed along the circumferential direction, the concave part between two adjacent supporting bosses is a water producing flow passage, water producing holes are formed in the water producing flow passage, the water producing holes are distributed in multiple layers along the axial direction of the central tube, the water producing holes of each layer are uniformly distributed along the circumferential direction, and the water producing holes of two adjacent layers are staggered; the bottom of the water producing flow channel is in an outer arch shape.
2. The base pipe of the high pressure STRO membrane module of claim 1, wherein the base pipe uses a modified ABS resin material, the modified ABS resin being prepared by a bulk polymerization process, the preparation raw materials comprising monovinylarene monomer, vinyl unsaturated nitrile monomer, uncrosslinked butadiene rubber, initiator, inert solvent, POSS additive and POSS chain transfer agent;
the POSS additive has a chemical formula (Ph x R 1-x SiO 1.5)n;
The POSS chain transfer agent has a chemical formula (R' y R"1-y SiO 1.5)m;
wherein Ph is phenyl, R is methacryloxypropyl, R' is isobutyl, R "is 3-mercaptopropyl, x=0.6 to 0.9, y=0 to 0.9, n=6, 8, 10 or 12, m=6, 8, 10 or 12.
3. The base pipe of a high pressure STRO membrane assembly of claim 1, wherein said support bosses are six and said water producing holes of each layer are three.
4. The center tube of the high pressure STRO membrane assembly of claim 1, wherein the water producing holes have a diameter of 2-3 mm and an open porosity of 0.07-0.1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010248686.1A CN111249915B (en) | 2020-04-01 | 2020-04-01 | Central tube of high-pressure STRO (short tandem oxidation) membrane assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010248686.1A CN111249915B (en) | 2020-04-01 | 2020-04-01 | Central tube of high-pressure STRO (short tandem oxidation) membrane assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111249915A CN111249915A (en) | 2020-06-09 |
| CN111249915B true CN111249915B (en) | 2024-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010248686.1A Active CN111249915B (en) | 2020-04-01 | 2020-04-01 | Central tube of high-pressure STRO (short tandem oxidation) membrane assembly |
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| Country | Link |
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| CN (1) | CN111249915B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498544A (en) * | 2016-01-13 | 2016-04-20 | 佛山市美的清湖净水设备有限公司 | Center pipe for filter element and filter device having same |
| CN206315682U (en) * | 2016-12-01 | 2017-07-11 | 佛山市美的清湖净水设备有限公司 | Outlet pipe, reverse osmosis membrane element and reverse osmosis filter element |
| CN110564104A (en) * | 2019-09-26 | 2019-12-13 | 科诺思膜技术(厦门)有限公司 | modified ABS resin, preparation method thereof, modified ABS composite material and application thereof |
| CN212467740U (en) * | 2020-04-01 | 2021-02-05 | 科诺思膜技术(厦门)有限公司 | Central tube of high-pressure STRO membrane module |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201764129U (en) * | 2010-08-26 | 2011-03-16 | 汤阴翰迪尔实业有限公司 | Composite special-shaped plastic pipe for coal mine |
| CN202185264U (en) * | 2011-06-29 | 2012-04-11 | 苏州顶裕水务科技有限公司 | Hollow fiber ultrafiltration membrane component with improved central conduit structure |
| JP2014039901A (en) * | 2012-08-21 | 2014-03-06 | Fujifilm Corp | Method for manufacturing carbon dioxide separation complex, carbon dioxide separation complex, and method for manufacturing carbon dioxide separation module using the same, as well as carbon dioxide separation module |
| KR101584052B1 (en) * | 2014-04-21 | 2016-01-20 | 주식회사 피코그램 | RO filter with side-sream type |
| CN104607047B (en) * | 2015-02-13 | 2017-11-07 | 湖南澳维环保科技有限公司 | A kind of coiled reverse osmosis membrane element |
| CN206103724U (en) * | 2016-08-26 | 2017-04-19 | 佛山市顺德区美的饮水机制造有限公司 | Spiral wound type reverse osmosis membrane technology and reverse osmosis water purifier |
| CN207485411U (en) * | 2017-10-30 | 2018-06-12 | 中国石油化工股份有限公司 | A kind of high intensity Thief zone sand screen |
| CN109999672B (en) * | 2019-04-16 | 2020-02-11 | 同舟纵横（厦门）流体技术有限公司 | Membrane module adapter |
-
2020
- 2020-04-01 CN CN202010248686.1A patent/CN111249915B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498544A (en) * | 2016-01-13 | 2016-04-20 | 佛山市美的清湖净水设备有限公司 | Center pipe for filter element and filter device having same |
| CN206315682U (en) * | 2016-12-01 | 2017-07-11 | 佛山市美的清湖净水设备有限公司 | Outlet pipe, reverse osmosis membrane element and reverse osmosis filter element |
| CN110564104A (en) * | 2019-09-26 | 2019-12-13 | 科诺思膜技术(厦门)有限公司 | modified ABS resin, preparation method thereof, modified ABS composite material and application thereof |
| CN212467740U (en) * | 2020-04-01 | 2021-02-05 | 科诺思膜技术(厦门)有限公司 | Central tube of high-pressure STRO membrane module |
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| Publication number | Publication date |
|---|---|
| CN111249915A (en) | 2020-06-09 |
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Address after: 361101 Room B, 4th floor, 98 Shitou Road, Xiang'an District, Xiamen City, Fujian Province Applicant after: UNISOL membrane technology (Xiamen) Co.,Ltd. Applicant after: XIAMEN JIARONG TECHNOLOGY Corp.,Ltd. Address before: 361101 Room B, 4th floor, 98 Shitou Road, Xiang'an District, Xiamen City, Fujian Province Applicant before: KONOS membrane technology (Xiamen) Co.,Ltd. Applicant before: XIAMEN JIARONG TECHNOLOGY Corp.,Ltd. |
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