CN110975629B - Design method of universal industrial reverse osmosis membrane element product - Google Patents
Design method of universal industrial reverse osmosis membrane element product Download PDFInfo
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- CN110975629B CN110975629B CN201911280289.6A CN201911280289A CN110975629B CN 110975629 B CN110975629 B CN 110975629B CN 201911280289 A CN201911280289 A CN 201911280289A CN 110975629 B CN110975629 B CN 110975629B
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- 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
- B01D63/06—Tubular membrane modules
- B01D63/061—Manufacturing thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
Abstract
The invention relates to a design method of a general industrial reverse osmosis membrane element product, which comprises the steps of calculating the cutting width of a membrane sheet, a water inlet separation net and a water production guide cloth of the membrane element through a relational expression according to the roll diameter, the total length, the page number, the outer diameter of a central rod and the exposed end size of the central rod of the membrane element, calculating the rolling circle number of the membrane sheet according to the roll diameter, the outer diameter and the page number of the central rod and the thicknesses of the membrane sheet, the water inlet separation net and the water production guide cloth, finally calculating the cutting length of the membrane sheet, the water inlet separation net and the water production guide cloth according to the relational expression, and rolling and curing the membrane element product after cutting according to the calculated cutting size. The invention provides a standardized design method suitable for designing membrane elements with various overall dimensions, which avoids material waste, reduces the design cost, improves the design efficiency, can design products meeting requirements according to the design method provided by the invention even if the experience is insufficient, and realizes the industrial operation of membrane element product design.
Description
The technical field is as follows:
the invention relates to the technical field of reverse osmosis membrane element rolling, in particular to a design method of a universal industrial reverse osmosis membrane element product.
Background art:
the reverse osmosis membrane element is one of the core elements of water treatment, is a key influencing factor for realizing deep filtration in the field of water treatment, the reverse osmosis technology becomes one of the technologies which are widely applied and most rapidly developed in China, and the reverse osmosis membrane element mainly comprises the following functional materials: the water inlet separation net, the water production guide cloth, the RO membrane, the center rod and the sealing glue. Although the reverse osmosis membrane elements are approximately the same in functional material composition structure, the membrane element products have more specifications and types, and the membrane products with different specifications have different appearance and size designs. When membrane element products of each specification are designed, the sizes of corresponding functional materials are required to be custom-made and selected according to the size design, when the sizes of the functional materials are determined, the functional materials are cut completely by means of experience and estimation, the cutting amount is rich, material waste is easy to cause, the cutting amount is insufficient, membrane products are easy to scrap, the design mode completely relying on experience increases the design difficulty of research and development personnel on the membrane element products, and the design and development cost of industrial membrane elements is greatly increased. Therefore, it is necessary to provide a standardized design method, which can meet the requirement of industrial production design, eliminate blind size design, reduce design and development costs, and implement a universal design method that is simple and easy to implement and suitable for various specifications.
The invention content is as follows:
in order to reduce the design and development cost of the membrane element, improve the design efficiency of the membrane element and realize the standardized design process of the membrane element product, the invention provides a design method of a general industrial membrane element product in the field, which is realized by the following technical scheme:
a design method of a general industrial reverse osmosis membrane element product comprises the following steps:
step 1: determining the design size of a membrane element Q, wherein the design size comprises a membrane roll diameter M, a total length Z of the membrane element, an outer diameter H of a central rod, a page number J and a shortening size Y, and the shortening size is the distance from the outer end face of the central rod to the outer end face of the membrane roll on the same side;
step 2: determining the cutting width A of the membrane used by the membrane element Q, the cutting width B of the water inlet separation net and the cutting width C and A, B, C of the water producing guide cloth, and determining the cutting width according to the following formula:
A＝B＝C＝Z-(Y1+Y2)+24
wherein, Y1And Y2The sizes of the left end and the right end of the membrane element are respectively the shortening sizes;
and step 3: determining the number of winding turns P of the membrane, wherein the value of P is determined according to the following formula:
in the above formula, U1Is the thickness of the membrane, U2For thickness of water-inlet separation net, U3The thickness of the water-producing cloth is measured;
and 4, step 4: determining the cutting length D of the membrane used by the membrane element Q, the cutting length E of the water inlet separation net and the cutting length F of the produced water guide cloth, wherein the size of D is calculated according to the following formula:
wherein, D, E, F the dimensional relationship of three is as follows:
D＝2E＝2F-50
and 5: and (4) determining the sizes according to the steps 1 to 4, then cutting, and then rolling the film, curing and adjusting the sizes of the exposed ends of the center rods at the two sides.
The invention provides a standardized design method of reverse osmosis membrane element products, which is suitable for designing membrane elements with various appearance sizes, and due to the adoption of a standardized design mode, the cutting size of functional materials of each part just meets the design requirement, the waste of materials and the deficiency of the cutting size are avoided, the design cost of the membrane element is reduced, the design efficiency is improved, even if a designer designs a product meeting the requirement according to the design method provided by the invention under the condition of insufficient experience, and the industrial operation of membrane element product design is realized.
Description of the drawings:
fig. 1 is a schematic structural view of a reverse osmosis membrane element.
The specific implementation mode is as follows:
the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The membrane element is designed, firstly, the appearance design size of the membrane element is determined, then the specification of each functional material is selected according to the size of the membrane element, the size of each functional material is designed, then the membrane element is cut according to the design size, and the membrane element is placed and rolled according to the corresponding sequence after being cut, so that the industrial reverse osmosis membrane element meeting the specified size requirement is prepared. The membrane element is well rolled, solidified and adjusted in size of the exposed end of the center rod, so that the invention does not describe the membrane element in detail, but focuses on how to determine the design size of each part.
Therefore, in this embodiment, a design method for a general industrial reverse osmosis membrane element product is disclosed, in order to clearly understand the structure of the membrane element product and the external dimensions of each part, the design method described in this embodiment is explained with reference to the dimension labels given in fig. 1, and mainly includes the following steps:
step 1: firstly, determining the design size of a membrane element Q, wherein the design size comprises a membrane roll diameter M, a total length Z of the membrane element, an outer diameter H of a central rod, a page number J and a shortening size Y, the shortening size is shown in figure 1 and refers to the distance from the outer end face of the central rod to the outer end face of a membrane roll on the same side, namely the length of the exposed end of the central rod, and the shortening sizes of the left end and the right end are Y respectively1And Y2The two ends are usually the same in the shortened dimension;
step 2: determining the cutting width A of the membrane used by the membrane element Q, the cutting width B of the water inlet separation net and the cutting width C and A, B, C of the water producing guide cloth, and determining the cutting width according to the following formula:
A＝B＝C＝Z-(Y1+Y2) +24 (formula 1)
And step 3: determining the number of winding turns P of the membrane, wherein the value of P is determined according to the following formula:
in the above formula, U1Is the thickness of the membrane, U2For thickness of water-inlet separation net, U3The thickness of the water-producing cloth is measured;
and 4, step 4: determining the cutting length D of the membrane used by the membrane element Q, the cutting length E of the water inlet separation net and the cutting length F of the produced water guide cloth, wherein the size of D is calculated according to the following formula:
wherein, D, E, F the dimensional relationship of three is as follows:
D2E 2F-50 (formula 4)
And 5: and (4) determining the sizes according to the steps 1 to 4, then cutting, and then rolling the film, curing and adjusting the sizes of the exposed ends of the center rods at the two sides.
The design method of the present invention will be demonstrated below by two specification membrane element practical design examples:
example 1: in this embodiment, a BW-8040 membrane element is taken as an example for design, and first, the roll diameter M of the designed membrane element is 190mm, the trimmed dimension Y is 20mm, the total length Z of the membrane element is 1016mm, the number J of pages is 22, and the outer diameter H of the center rod is 38 mm; then calculating the cutting width A of the membrane, the cutting width B of the water inlet separation net and the cutting width C of the water production guide cloth according to the formula (1) to be 1000 mm; determining the thickness U of the selected membrane according to the process requirements10.13mm, water inlet isolation net thickness U20.8636mm, water production cloth guide thickness U3Calculating the number of turns P of the membrane in the winding process to be 2.46 turns according to the formula (2); and then respectively calculating the cutting length D of the membrane to be 1788mm, the cutting length E of the water inlet separation net to be 894mm and the cutting length F of the water production guide cloth to be 919mm according to a formula (3) and a formula (4), and finally cutting according to the calculated sizes, rolling, curing and adjusting the shortened size.
Example 2: in this example, a RW-4040 membrane element was designed as an example, and first, the roll diameter M of the designed membrane element was determined to be 90mm, the trimmed dimension Y was determined to be 30mm, the total length Z of the membrane element was determined to be 1016mm, the number J of sheets was determined to be 6, and the outer diameter H of the center rod was determined to be 20 mm; then calculating the cutting width A of the membrane, the cutting width B of the water inlet separation net and the cutting width C of the water production guide cloth according to the formula (1) to be 980 mm; determining the thickness U of the selected membrane according to the process requirements10.13mm, water inlet isolation net thickness U20.762mm, water production cloth guide thickness U3Calculating the number of turns P of the membrane in the winding process to be 4.4 turns according to the formula (2) when the diameter is 0.254 mm; calculating the cutting length D of the membrane 1564mm, the cutting length E of the water inlet separation net 782mm and the cutting length F of the water generating cloth 807mm according to the formula (3) and the formula (4), and cutting according to the calculated sizesAnd (5) rolling, curing and adjusting the shortening size.
When a membrane element product is designed traditionally, all functional materials are cut by means of experience and size estimation, trial rolling is carried out after cutting, whether the diameter of a rolled coil is within a set range or not is seen, if the diameter of the rolled coil does not accord with a design value, readjustment is needed or the size of each material is cut again, trial rolling is carried out again until the size of the rolled coil meets the design requirement, and therefore the design mode is very complicated, the efficiency is low, and the material is easily wasted seriously. Through multiple practical comparison verifications, the efficiency of membrane elements with corresponding models in the two embodiments is compared by the method and the traditional design method, and the result shows that the efficiency of the design method provided by the invention is improved by more than 90%, so that the efficiency improvement effect is very obvious, and the method can be comprehensively popularized and used in the industrial design of reverse osmosis membrane elements.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A design method of a general industrial reverse osmosis membrane element product is characterized by comprising the following steps: the method comprises the following steps:
step 1: determining the design size of a membrane element Q, wherein the design size comprises a membrane roll diameter M, a total length Z of the membrane element, an outer diameter H of a central rod, a page number J and a shortening size Y, and the shortening size is the distance from the outer end face of the central rod to the outer end face of the membrane roll on the same side;
step 2: determining the cutting width A of the membrane used by the membrane element Q, the cutting width B of the water inlet separation net and the cutting width C and A, B, C of the water producing guide cloth, and determining the cutting width according to the following formula:
A＝B＝C＝Z-(Y1+Y2)+24
wherein, Y1And Y2Respectively is the trimming short ruler at the left and right ends of the membrane elementCun, cun;
and step 3: determining the number of winding turns P of the membrane, wherein the value of P is determined according to the following formula:
in the above formula, U1Is the thickness of the membrane, U2For thickness of water-inlet separation net, U3The thickness of the water-producing cloth is measured;
and 4, step 4: determining the cutting length D of the membrane used by the membrane element Q, the cutting length E of the water inlet separation net and the cutting length F of the produced water guide cloth, wherein the size of D is calculated according to the following formula:
wherein, D, E, F the dimensional relationship of three is as follows:
D＝2E＝2F-50
and 5: and (4) determining the sizes according to the steps 1 to 4, then cutting, and then rolling the film, curing and adjusting the sizes of the exposed ends of the center rods at the two sides.
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| CN112507493B (en) * | 2020-12-18 | 2021-10-22 | 中芯膜(北京)科技有限公司 | Method for calculating effective membrane area of universal reverse osmosis membrane element |
| CN114602320B (en) * | 2022-03-25 | 2023-04-18 | 珠海格力电器股份有限公司 | Method for manufacturing stage type filter element |
| CN115203932B (en) * | 2022-07-11 | 2024-04-16 | 浙江津膜环境科技有限公司 | Design method of universal hollow fiber ultrafiltration curtain type membrane component |
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| CN101966429A (en) * | 2010-11-04 | 2011-02-09 | 北京时代沃顿科技有限公司 | Spiral coil type membrane component |
| CN104492268A (en) * | 2014-12-16 | 2015-04-08 | 珠海格力电器股份有限公司 | Winding type reverse-osmosis element and preparation method thereof |
| WO2015168584A1 (en) * | 2014-05-01 | 2015-11-05 | Sabic Global Technologies B.V. | Porous asymmetric polyphenylene ether membranes and associated separation modules and methods |
| CN105642123A (en) * | 2016-01-23 | 2016-06-08 | 山东九章膜技术有限公司 | Membrane rolling method capable of rolling two reverse osmosis membrane elements simultaneously |
| CN108579430A (en) * | 2018-05-10 | 2018-09-28 | 天津大学 | The method for coiling of multilayer water inlet flow channel cloth and its novel reverse-osmosis membrane element of composition |
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| US20170081216A1 (en) * | 2015-09-18 | 2017-03-23 | Maher Isaac Kelada | Methods of making flat sheet membrane element adapted for use in symbiotic fluids factionation, water treatment, and osmotic processes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101966429A (en) * | 2010-11-04 | 2011-02-09 | 北京时代沃顿科技有限公司 | Spiral coil type membrane component |
| WO2015168584A1 (en) * | 2014-05-01 | 2015-11-05 | Sabic Global Technologies B.V. | Porous asymmetric polyphenylene ether membranes and associated separation modules and methods |
| CN104492268A (en) * | 2014-12-16 | 2015-04-08 | 珠海格力电器股份有限公司 | Winding type reverse-osmosis element and preparation method thereof |
| CN105642123A (en) * | 2016-01-23 | 2016-06-08 | 山东九章膜技术有限公司 | Membrane rolling method capable of rolling two reverse osmosis membrane elements simultaneously |
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Denomination of invention: Design Method for a Universal Industrial Reverse Osmosis Membrane Component Product Effective date of registration: 20230801 Granted publication date: 20220304 Pledgee: China Merchants Bank Co.,Ltd. Shaoxing Branch Pledgor: ZHEJIANG JINMO ENVIRONMENT TECHNOLOGY CO.,LTD. Registration number: Y2023330001591 |
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