Polytetrafluoroethylene sewage filtering material for chemical printing and dyeing wastewater

Abstract

The utility model discloses a polytetrafluoroethylene sewage filtering material for chemical printing and dyeing wastewater, which comprises a left base material layer (1) and a right base material layer (1), a polytetrafluoroethylene nano-filtration membrane (2) is arranged between the two base material layers (1), and one or more polytetrafluoroethylene microporous membranes (3) are arranged on the outer side of one base material layer (1); the base material layer (1) is formed by weaving warp yarns of metal fibers and weft yarns of polytetrafluoroethylene fibers in a warp and weft weaving mode. The filter has the characteristic that the filtering effect can be effectively improved.

Description

Technical Field

[0001] The utility model relates to a sewage filtering material, in particular to a polytetrafluoroethylene sewage filtering material used for chemical printing and dyeing wastewater. Background Art

[0002] The printing and dyeing process commonly used in the printing and dyeing industry includes pre-treatments such as singeing, desizing, scouring, bleaching, shaping and mercerizing, as well as post-treatments such as stenting and finishing. The above process will produce a lot of printing and dyeing wastewater, which contains different harmful substances. The wastewater needs to be treated before it can be discharged. With the rapid development of membrane technology, membrane filtration technology has been gradually used in the field of printing and dyeing wastewater treatment. Generally, the filter membrane is installed in the filtration device to filter and treat the printing and dyeing wastewater. However, the filtering effect of the filter material of the existing filtration device is general, and some harmful substances cannot be filtered, resulting in incomplete sewage treatment. Therefore, the existing technology has the problem of unsatisfactory filtering effect. Utility Model Content

[0003] The purpose of the utility model is to provide a polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater. The utility model has the characteristic of being able to effectively improve the filtering effect.

[0004] The technical solution of the utility model is as follows: a polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater comprises two substrate layers distributed on the left and right, a polytetrafluoroethylene nanofiltration membrane is arranged between the two substrate layers, one or more layers of polytetrafluoroethylene microporous membrane are arranged on the outer side of one substrate layer; the substrate layer is woven by warp yarns of metal fibers and weft yarns of polytetrafluoroethylene fibers through warp and weft weaving methods.

[0005] In the aforementioned polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater, the fabric structure of the substrate layer is a plain weave structure.

[0006] In the aforementioned polytetrafluoroethylene sewage filtration material used for chemical printing and dyeing wastewater, the filtration accuracy of the polytetrafluoroethylene nanofiltration membrane is 50nm-60nm.

[0007] In the aforementioned polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater, the filtration accuracy of the polytetrafluoroethylene microporous membrane is 10-15 microns.

[0008] Compared with the prior art, the utility model provides two substrate layers distributed on the left and right, a polytetrafluoroethylene nanofiltration membrane is provided between the two substrate layers, and one or more polytetrafluoroethylene microporous membranes are provided on the outside of one of the substrate layers. Through the cooperation between the above-mentioned membrane layers, the filtering effect can be effectively improved; at the same time, the substrate layer is woven by warp and weft of metal fiber and polytetrafluoroethylene fiber, which not only has a certain filtering effect, but also has good structural strength, and improves the impact resistance of the filtering material. In summary, the utility model has the characteristics of being able to effectively improve the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] The markings in the attached drawings are: 1-substrate layer, 2-polytetrafluoroethylene nanofiltration membrane, 3-polytetrafluoroethylene microporous membrane. DETAILED DESCRIPTION

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0012] Embodiment. Polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater, composed of Figure 1 As shown, it includes two substrate layers 1 distributed on the left and right, a polytetrafluoroethylene nanofiltration membrane 2 is arranged between the two substrate layers 1, and one or more polytetrafluoroethylene microporous membranes 3 are arranged on the outer side of one substrate layer 1; the substrate layer 1 is woven by the warp yarn of metal fiber and the weft yarn of polytetrafluoroethylene fiber through warp and weft weaving.

[0013] The fabric structure of the substrate layer 1 is a plain weave structure, which can further improve the firmness of the substrate.

[0014] The filtration accuracy of the polytetrafluoroethylene nanofiltration membrane 2 is 50nm-60nm.

[0015] The filtration accuracy of the polytetrafluoroethylene microporous membrane 3 is 10-15 microns.

[0016] The outer side of the polytetrafluoroethylene microporous membrane at the outer end is also provided with a detachable filter cotton. Each side edge of the polytetrafluoroethylene microporous membrane is provided with a magnet or a male Velcro, and the detachable filter cotton is provided with a corresponding magnetic sheet or a female Velcro. By adopting the above structure, larger particles of impurities can be filtered, and they can be directly disassembled and replaced after a period of use, thereby extending the service life of the polytetrafluoroethylene microporous membrane and the polytetrafluoroethylene nanofiltration membrane.

[0017] The polytetrafluoroethylene fiber can be 1200D polytetrafluoroethylene filament.

[0018] The preparation process of the utility model is as follows: firstly, three layers of polytetrafluoroethylene microporous membranes are adhered to the outer side of one of the substrate layers by glue, then the polytetrafluoroethylene nanofiltration membrane is adhered to the inner side of the substrate layer, and finally another substrate layer is adhered to the side of the polytetrafluoroethylene nanofiltration membrane.

Claims

1. Used for polytetrafluoroethylene sewage filtration material for chemical printing and dyeing wastewater, characterized by: The invention comprises two substrate layers (1) distributed on the left and right, a polytetrafluoroethylene nanofiltration membrane (2) is arranged between the two substrate layers (1), and one or more polytetrafluoroethylene microporous membranes (3) are arranged on the outer side of one substrate layer (1); the substrate layer (1) is woven by warp yarns of metal fibers and weft yarns of polytetrafluoroethylene fibers through warp and weft weaving.

2. The polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater according to claim 1, characterized in that: The fabric structure of the substrate layer (1) is a plain weave structure.

3. The polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater according to claim 1, characterized in that: The filtration accuracy of the polytetrafluoroethylene nanofiltration membrane (2) is 50nm-60nm.

4. The polytetrafluoroethylene sewage filter material for chemical printing and dyeing wastewater according to claim 1, characterized in that: The filtration accuracy of the polytetrafluoroethylene microporous membrane (3) is 10-15 microns.

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