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Membrane transfer coating MBR membrane and preparation method thereof

A technology of membrane transfer and transfer membrane, which is applied in the field of water treatment, can solve the problems of poor mechanical properties of MBR membrane components, and achieve the effects of avoiding instability, controllable thickness, and simple preparation method

Inactive Publication Date: 2020-10-13
CHINA HAISUM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the problem of poor mechanical properties of existing MBR membrane modules

Method used

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  • Membrane transfer coating MBR membrane and preparation method thereof
  • Membrane transfer coating MBR membrane and preparation method thereof
  • Membrane transfer coating MBR membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of film transfer coating MBR film:

[0037] Step 1: Prepare casting solution: uniformly mix 20 parts of PVDF powder, 5 parts of polyethylene glycol 1000, 3 parts of acrylate and 72 parts of dimethylacetamide, then stir at a constant speed for 6 hours in a water bath at 80°C, and then 150-mesh screen filtration, vacuum defoaming treatment to obtain refined casting liquid;

[0038] Step 2: Coating of MBR film: Coat the prepared casting solution on two 0.2mm 304 stainless steel belt transfer films synchronously with a comma knife coater on the horizontal upper surface, and the coating speed is 0.2m / s, the double-sided coating speed difference is not more than ±2%, the coating thickness is 200 μm, and the double-sided coating drive shaft, roller pressing shaft, and interval knitted fabric unwinding shaft are interlocked at the same speed;

[0039] Step 3: Spraying the adhesion promoter: Spray the 0.5% acrylate adhesion promoter on the surface ...

Embodiment 2

[0043] A kind of preparation method of film transfer coating MBR film:

[0044] Step 1: Prepare casting solution: uniformly mix 20 parts of PVDF powder, 5 parts of polyethylene glycol 1000, 3 parts of acrylate and 72 parts of dimethylacetamide, then stir at a constant speed for 6 hours in a water bath at 80°C, and then 150-mesh screen filtration, vacuum defoaming treatment to obtain refined casting liquid;

[0045] Step 2: Coating of MBR film: Coat the prepared casting solution on two 0.2mm 304 stainless steel belt transfer films synchronously with a comma knife coater on the horizontal upper surface, and the coating speed is 0.2m / s, the double-sided coating speed difference is not more than ±2%, the coating thickness is 200 μm, and the double-sided coating drive shaft, roller pressing shaft, and interval knitted fabric unwinding shaft are interlocked at the same speed;

[0046] Step 3: Spraying the adhesion promoter: Spray the acrylate adhesion promoter with a concentration...

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Abstract

The invention discloses a membrane transfer coating MBR membrane and a preparation method thereof. The preparation method comprises the steps of respectively and synchronously coating two transfer membranes with a membrane casting solution; spraying an acrylate adhesion promoter on the surface of the membrane casting solution; transferring two MBR wet membrane layers loaded on the transfer membrane to the upper surface and the lower surface of a supporting material at the same time, and carrying out vertical rolling compounding to obtain a compounded MBR wet membrane; feeding the two MBR wet membranes loaded on the transfer membrane into a coagulating bath for coagulating, and automatically stripping the transfer membrane from an MBR coagulating membrane layer after coagulating is completed; enabling the stripped MBR membrane to enter a washing bath, and washing and drying to obtain the MBR membrane. According to the invention, a membrane transfer coating mode is adopted, so that the thickness is accurate and controllable, membrane liquid is prevented from permeating into the supporting material, and two wet membrane layers are consistent in structure and performance; the binding force of the membrane layer and the supporting material is improved, the life cycle of the MBR membrane is prolonged, and high-pressure backwashing is realized; and the preparation process is simple tooperate, and integrated production can be realized.

Description

technical field [0001] The invention relates to a method for preparing a membrane transfer coated MBR membrane, and relates to the technical field of water treatment. Background technique [0002] MBR, also known as Membrane Bio-Reactor (Membrane Bio-Reactor), is a new water treatment technology that combines activated sludge process and membrane separation technology. Compared with the traditional activated sludge method and multi-layer laminar flow and aeration technology, MBR technology has the advantages of good effluent quality, relatively low sludge production, and small footprint. Therefore, it will be the general trend to introduce MBR technology to treat urban sewage . [0003] MBR membranes used in sewage treatment by MBR technology are currently divided into four types: hollow fiber membranes, flat membranes, ceramic membranes, and tubular membranes. MBR flat membrane has unique advantages such as simple structure, stable process, strong anti-pollution ability, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/12B01D67/00C02F3/12
CPCB01D67/0011B01D69/12B01D71/34C02F3/1268Y02W10/10
Inventor 唐婷婷张园园张佳琳黄德飞吴立群
Owner CHINA HAISUM ENG
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