Continuous casting production molding method of hollow fiber membrane module

Abstract

The invention discloses a continuous casting production molding method of a hollow fiber membrane module. The method comprises the following steps: filling the membrane shell of a hollow fiber membrane module with a bundle of membrane silks to be cast, and sealing the ends, to be cast, of the membrane silks with a sealant; and mounting a casting tool, performing continuous casting through successively casting flexible epoxy resin or polyurethane and then casting hard epoxy resin by a process for casting the flexible epoxy resin and the hard epoxy resin from the bottom of the hollow fiber membrane module, and curing the resins to form a sealed structure with a flexible top and a hard bottom on the dependence of the inherent density difference between the two resins. The flexible epoxy resinis adopted to substitute the polyurethane to carry out root protection, so the requirement for the dryness of the membrane silks is significantly reduced, and the requirements for the temperature andthe humidity of the casting environment are reduced, thereby the cost investment of casting hardware is reduced, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of membrane modules, and in particular relates to a continuous casting and molding method for a hollow fiber membrane module. Background technique [0002] At present, hollow fiber membrane is an important realization form of membrane separation technology. It is widely used in energy, light industry, food, bioengineering and environmental protection and other fields, and has a significant role in promoting social progress, economic development and environmental protection. [0003] The production process of the existing hollow fiber membrane module is generally formed by first grouping the hollow fiber membrane membrane filaments into bundles and packing them into the membrane shell, and then sealing both ends of the hollow fiber membrane membrane with resin. Considering that the membrane module needs to operate under pressure, most of the resins used are epoxy resins with high hardness after curing. Durin...

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Problems solved by technology

But on the one hand, the adhesion between silicone rubber and epoxy resin is poor. This method not only cannot solve the problem of protecting the root of the membrane filament, but also increases the probability of broken filaments. When polyurethane is used, it is not suitable for the environment temperature and humidity and the content of the membrane filament. The amount of water has very strict requirements. In order to meet the requirements for the use of polyurethane, the drying time of the membrane filaments can only be extended and the temperature and humidity control requirements of the pouring environment can be improved, which significantly reduces production efficiency and increases cost investment; on the other hand, secondary pouring It is necessary to wait for the epoxy resin to solidify for a period of time after a pouring is completed before starting to feed the material from the side port to complete the pouring process. This operation method is relatively cumbersome, with low efficiency, high labor costs and time costs, and cannot be used for membrane modules. The purpose of protecting the roots of membrane filaments is achieved by partitions or other diversion structures inside, which is not conducive to the large-scale promotion and application of membrane modules.

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