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Method for pouring hollow fibrous membrane assembly

A pouring method and fiber membrane technology, applied in the field of membrane separation, can solve problems such as troublesome operation, inability to perform secondary pouring, and special structure, and achieve the effects of not easy to break wires, wide applicability, and improved mechanical strength

Inactive Publication Date: 2012-07-25
天津华泉环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, membrane manufacturers adopt the method of secondary pouring of soft glue to protect the root of the membrane filaments, so as to reduce the broken filament rate during module operation, but this method is more troublesome to operate, and some membrane modules cannot be cast twice due to their special structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A hollow fiber membrane module casting method is to assemble the hollow fiber membrane into a membrane module, first passivate both ends of the hollow fiber membrane bundle, and then pour potting glue to bond and fix the hollow fiber membrane bundle on the module shell to form Relatively closed and isolated environment.

[0021] The passivating substance is an organic liquid toughening agent, a polymer resin solution or a solution that increases the toughness and strength of the fiber membrane. Pouring potting glue is epoxy resin or polyurethane or silica gel with curing hardness above 90 Shore. When pouring the potting compound, the hollow fiber membrane bundles are bonded together and fixed on the module shell.

Embodiment 2

[0023] A hollow fiber membrane module casting method, the same as embodiment 1. It is characterized by diluting the polyfluoroethylene propylene dispersion concentrate with water and ethanol to prepare a passivation solution. The weight percentage concentrations of polyfluoroethylene propylene, water and ethanol in the solution are respectively: 10-30wt%, 50-65wt% % and 5-25wt%. Then, immerse one end of the PVDF hollow fiber ultrafiltration membrane with a length of about 10 cm into the prepared passivation solution, remove it after about 30 seconds, and let it dry naturally. The mechanical strength of the root of the obtained fiber membrane is 50% higher than that of the unpassivated membrane, and when ordinary epoxy resin is used as potting glue, it will not burn to death.

Embodiment 3

[0025] A hollow fiber membrane module pouring method, the polytetrafluoroethylene dispersed concentrated solution is diluted with water and ethanol to prepare a passivation solution, and the weight percent concentrations of polytetrafluoroethylene, water and ethanol in the solution are respectively: 15-20wt% , 65-75wt% and 5-15wt%. Then, immerse one end of the PVDF hollow fiber ultrafiltration membrane with a length of about 10 cm into the prepared passivation solution, remove it after about 30 seconds, and let it dry naturally. The mechanical strength of the root of the obtained fiber membrane is 60% higher than that of the unpassivated membrane, and when ordinary epoxy resin is used as the potting glue, there will be no burning phenomenon.

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Abstract

The invention relates to a method for pouring a hollow fibrous membrane assembly, belonging to the technical field of membrane separation. The method for pouring the hollow fibrous membrane assembly is characterized by comprising the following steps of: assembling a hollow fibrous membrane into a membrane assembly, firstly passivating two ends of a hollow fibrous membrane beam, and pouring a pouring sealant to adhere and fixing the hollow fibrous membrane on an assembly shell to form relatively sealed separation environment. According to the method for pouring the hollow fibrous membrane assembly, disclosed by the invention, the purposes of adhering, fixing, wire-burning resisting and root protecting can be realized as long as once pouring is carried out on a membrane assembly; and the method for pouring the hollow fibrous membrane assembly, disclosed by the invention has the advantages of simple process, low cost, effective protection on the root of membrane fiber, no wire burning phenomenon, improvement on mechanical strength of the root of the membrane fiber, difficulty for breaking wires, simpleness, convenience, feasibility, wide application and the like.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a casting method of a hollow fiber membrane module. Background technique [0002] At present, membrane separation technology is a separation technology widely used in the separation, concentration and purification of solutions or gaseous substances. Hollow fiber membranes and modules are an important form of separation membranes, and have been widely used in environmental protection, food, medicine, chemical and other fields. In order to use hollow fiber membranes for separation, hollow fiber membranes must be assembled into a membrane module, that is, a large number of hollow fiber membranes are fixed on the module shell to form a relatively closed separation environment. [0003] In US Patent No. 5,639,373, the ends of the fiber bundles are discretely immersed in a spillage liquid, such as paraffin, until the liquid solidifies. Then the potting glue, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/02
Inventor 郭艳芬赵艳华王家彩
Owner 天津华泉环保设备有限公司
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