Hollow fiber ultrafiltration membrane module casting device and casting method

Abstract

The invention discloses a hollow fiber ultrafiltration membrane module casting device, and a casting method thereof. According to the hollow fiber ultrafiltration membrane module casting device, a membrane module composed of membrane silk bundles, a center tube, and a holder is arranged in a membrane shell; the two ends of the membrane shell are connected with a fluid outlet end module and a fluid inlet end module respectively; the fluid outlet end module and the fluid inlet end module are both provided with a first gel inlet pipe interface; the inner end surface of the fluid outlet end module is provided with a cylindrical groove; the inner end surface of the fluid inlet end module is provided with a conical groove, wherein the sidewall of the conical groove is a circular conical surface, and the bottom surface of the conical groove is a small diameter end; the center tube is connected with a second gel inlet pipe; the fluid outlet end module and the fluid inlet end fluid are connected with an end body of the membrane shell via U-shaped clamps. The method used for casting hollow fiber ultrafiltration membrane modules via the hollow fiber ultrafiltration membrane module casting device comprises following steps: 1, the membrane module is prepared; 1, the membrane shell is filled with the membrane module, and membrane silk of the two ends are cut off; 3, membrane silk blocking processing is performed, and module fixing is performed; 4, hard gel preparation is performed; 5, first gel delivering casting is performed; 6, soft gel preparation is performed; 7, second gel delivering casting is performed; and 8, the module is removed, and fluid outlet end cutting is performed so as to expose fiber membrane nematopores and obtain the fluid outlet end of the membrane module.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a hollow fiber ultrafiltration membrane module casting device and a casting method thereof. Background technique [0002] Membrane separation technology is a high-tech widely used in liquid or gas separation, purification or concentration. Hollow fiber membrane has become an important branch of membrane separation technology due to its large specific surface area, high packing density, simple process, no support layer, reverse cleaning and low production cost. It is widely used in chemical, environmental protection and pharmaceutical fields. . [0003] Common membrane modules with hollow fiber membranes as the core can be divided into pressure membrane modules and submerged membrane modules according to the structure of the filtration system. When filtering, relying on the pressure difference between the inside and outside of the hollow fiber membrane to make the li...

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Problems solved by technology

But its disadvantages are also obvious: After the mold is installed at both ends of the membrane shell with the membrane filaments, there is a reasonable gap between the closed end of the membrane filaments and the mold, and the two ends of the membrane filaments are filled with epoxy resin. Cured in membrane housing by casting epoxy

Since the membrane tow is not constrained in the length direction of the membrane shell, the two ends of the membrane shell with the membrane tow are installed with molds and placed horizontally in the casting machine, and the casting machine drives the membrane shell to rotate at high speed for epoxy resin casting , the membrane tow tends to be biased toward one end of the membrane shell. In extreme cases, there is even no gap between the closed end of the membrane tow and the mold, and all the reserved gaps are at the other end, resulting in that the epoxy resin cannot seal the membrane holes of the closed end of the membrane tow. Completely closed, the final obtained membrane module was scrapped because it did not meet the requirements

[0006] So far, the field has not developed a hollow fiber membrane module sealing method and membrane module sealing casting device with high production efficiency, low sealing defect rate and simple operation

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