Method for increasing membrane area of spiral wound type membrane element
A roll-type membrane and membrane area technology, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of reducing the water production efficiency of membrane elements and small water treatment area, so as to increase the effective membrane area, The effect of increasing the membrane area and reducing the cost
Active Publication Date: 2011-07-20
VONTRON TECH CO LTD
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Problems solved by technology
In the membrane folding process before rolling, it is generally only considered that there is enough size on the bottom edge to fully bond with the water flow channel cloth and glue, while ignoring that the membrane is not fully utilized and the effective water treatment area is small , thereby reducing the water production efficiency of the membrane element
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[0019] Example. A method for increasing the membrane area of a spiral-wound membrane element, which is characterized in that: the number of turns n of the folded membrane is wound on the membrane element by the water collection pipe and the innermost ring of multi-layer water production channel cloth when the membrane is wound. 1 overall diameter D 0 , the thickness of the selected diaphragm 2 & 1 , Folded diaphragm (the selected diaphragm is formed after one fold, divided into the first half page and the second half page) the number of pages in m, the thickness of the feed runner cloth 3& 2 , Product water flow channel cloth 1 thickness & 3 and the required roll diameter of the membrane element &, according to the formula &=D 0 +2mn(2& 1 +& 2 +& 3 )Sure. When the membrane element is rolled, the interval distance ΔL of the membrane after each page is folded is determined by the number of pages of the membrane after folding m and the total diameter D of the water colle...
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The invention discloses a method for increasing the membrane area of a spiral wound type membrane element. In the method, the number n of rings of a membrane disc after being wound and folded on the membrane element is determined by the total diameter D0 of a water collecting pipe which is not wound with the membrane disc and a plurality of layers of water-producing runner fabric at the innermost ring, the thickness ampersand 1 of the selected membrane disc, the number m of pages of the membrane disc after folding, the thickness ampersand 2 of feeding runner fabric, the thickness ampersand 3 of water-producing runner fabric and required winding diameter ampersand of the membrane element, as well as the formula that ampersand is equal to D0 plus 2mn(2 ampersand 1 plus ampersand 2 plus ampersand 3). The method can fully utilizing the membrane disc for increasing the membrane area of the membrane element, for the membrane disc with the same specification, the membrane element wound by the method can increase the membrane area by more than 8.5% and improve the flux by more than 9% in comparison with the membrane element which is folded in the ordinary way. Meanwhile, the material consumption and the cost can be reduced on the basis of determining the same membrane area .
Description
technical field [0001] The invention relates to a method for increasing the membrane area of a spiral-wound membrane element, and belongs to the technical field of filters in water purification devices. Background technique [0002] Membrane technology is widely used for its simplicity, high packing density, good water quality, suitable for automatic operation, and convenient maintenance. At present, the membrane elements used for filtration devices in membrane technology mainly include: spiral wound membrane elements, hollow fiber membrane elements , Tubular membrane elements, plate and frame membrane elements, etc., due to the compact design and low price of coiled membrane elements, they occupy a large part of the market share. These include microfiltration membranes, ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes, pervaporation membranes, etc. These membrane elements use the separation function of the membrane itself to remove one or mor...
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IPC IPC(8): B01D61/00C02F1/44
Inventor 王双蔡相宇金焱蔡志奇
Owner VONTRON TECH CO LTD