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Automatic film coating apparatus for flat plate ceramic film, and flat plate ceramic film preparation method

A technology of coating device and ceramic membrane, applied in the field of water purification, can solve the problems that the outer surface is easily touched or polluted, affect the effective service life of the membrane, increase the frequency of replacing membrane elements, etc., and achieve high differential flow and consistent membrane thickness. , to avoid the effect of on-site operation

Pending Publication Date: 2018-08-24
上海硅苑膜科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the preparation methods of flat ceramic membranes at home and abroad are mostly in a state of strict confidentiality, and no patents about flat ceramic membrane coating devices have been found through searching. The methods for preparing flat ceramic membranes mostly use spraying or manual dipping. The disadvantages are: the process route is long, the film thickness on both sides of the flat film is inconsistent, the uniformity of the whole film is not high, the edge of the flat film is defective, etc.
These shortcomings will lead to rapid flux attenuation in the application process of the flat ceramic membrane, and it is not easy to regenerate and clean, which directly affects the effective service life of the membrane and increases the frequency of replacing membrane elements.
[0005] The structure of flat ceramic membrane and tubular ceramic membrane is quite different. The separation layer of the flat membrane is located on the outer surface of the ceramic support, which is different from the separation layer of the tubular membrane on the inner surface of the support. During the coating process , the surface quality of the film is easily affected by factors such as the environment, tooling, and human factors. The outer surface is easily touched or polluted, which affects the integrity of the film. key factor

Method used

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  • Automatic film coating apparatus for flat plate ceramic film, and flat plate ceramic film preparation method
  • Automatic film coating apparatus for flat plate ceramic film, and flat plate ceramic film preparation method
  • Automatic film coating apparatus for flat plate ceramic film, and flat plate ceramic film preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as Figure 1 to Figure 4 As shown, the automatic film coating device for flat ceramic film includes: a rotating track 15, a support body drying device 11, a film dipping tank 12, and a post-coating drying device 13.

[0041] figure 1 Among them, F1, F2 and F3 are the three states of the support body 10 during the film coating process, F1 is the bare support body; F2 is the flat ceramic film being coated; F3 is the flat ceramic film after coating.

[0042] The rotating track 15 drives the support body of the flat ceramic membrane to pass through the support body drying device 11 , the film dipping tank 12 and the post-coating drying device 13 in sequence.

[0043] The support body drying device 11 is used to pre-dry the uncoated support body. The drying temperature of the support body drying device 11 is 40-70°C.

[0044] The dipping tank 12 is filled with a coating solution, the support body 10 is immersed in the coating solution, and each outer surface is in co...

Embodiment 2

[0058] This embodiment provides a method for preparing a flat ceramic membrane using the device in Example 1.

[0059] 1) Put 20g of 1N nitric acid into 4000g of deionized water, stir at low speed for 3 minutes, slowly add 10 parts of 400g of alumina alumina (D50: 0.1μm-3μm) powder, stir at high speed for 20 minutes, slowly add 40g of PVA powder, and continue stirring 20 minutes.

[0060] 2) Put the prepared mixture into a vacuum device with a vacuum degree of 0.005MPa, and stir at a low speed for more than 20 minutes.

[0061] 3) Move the prepared mixture into the immersion film tank 12 of the automatic film coating device, and then start the automatic film coating device to carry out the film coating operation on the support body. The support body first passes through the support body drying device 11 for pre-drying, and then enters the Dip the slurry in the dipping tank 12, and then enter the post-coating drying device 13 for drying. In the above process, the time for dip...

Embodiment 3

[0065] This embodiment further provides a method for preparing a flat ceramic membrane using the device in Example 1.

[0066] 1) Put 40g of 1N nitric acid into 4000g of deionized water, stir at low speed for 5 minutes, slowly add 10 parts of 400g of alumina alumina (D50: 0.1μm-3μm) powder, stir at high speed for 30 minutes, slowly add 40g of PVA powder, and continue stirring 30 minutes.

[0067] 2) Put the prepared mixture into a vacuum device with a vacuum degree of 0.01 MPa, and stir at a low speed for more than 30 minutes.

[0068] 3) Move the prepared mixture into the immersion film tank 12 of the automatic film coating device, and then start the automatic film coating device to carry out the film coating operation on the support body. The support body first passes through the support body drying device 11 for pre-drying, and then enters the Dip the slurry in the dipping tank 12, and then enter the post-coating drying device 13 for drying. In the above process, the time...

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Abstract

The invention provides an automatic film coating apparatus for a flat plate ceramic film, and a flat plate ceramic film preparation method. The automatic film coating apparatus comprises: a supportingbody drying device for pre-drying a uncoated supporting body; an immersion-film groove, wherein the immersion-film groove is filled with a film coating liquid, the supporting body is immersed into the film coating liquid, and the outer surfaces on both sides simultaneously contact the film coating liquid; an after-film-coating drying device for drying the supporting body after the film coating; arotation track, wherein the rotation rack carries the supporting body to sequentially pass through the supporting body drying device, the immersion-film groove and the after-film-coating drying device; and a control cabinet, wherein the parameters controlled by the control cabinet comprise the stepping speed of the rotation track, the drying temperature of the after-film-coating drying device, the residence time of a wor-kpiece in the immersion-film groove, and the drying temperature of the supporting body drying device. According to the present invention, both sides of the supporting body cannot be immersed into the film coating liquid so as to ensure the effluent amount of the finally produced flat plate ceramic film.

Description

technical field [0001] The invention relates to an automatic film coating device for a flat ceramic membrane, and also relates to a preparation method for a flat ceramic membrane, which belongs to the field of water purification. Background technique [0002] With the rapid development of membrane technology, flat membranes have been increasingly used in sewage treatment, seawater desalination and other fields due to their advantages such as simple structure, large flux, easy regeneration and cleaning, convenient membrane replacement, and low operating costs. . [0003] At present, the flat membranes used in the field of sewage treatment are mainly made of organic materials, such as polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), etc., but the poor oxidation resistance and hydrophilicity of organic membranes lead to low separation efficiency , Short life, which limits its scope of use, especially for industrial wastewater with complex components. Flat ceramic mem...

Claims

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Application Information

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IPC IPC(8): B01D69/06B01D69/10B01D67/00B01D71/02B05C9/14B05C3/10B05D3/02B05C13/02B05D1/18
CPCB01D67/0039B01D69/06B01D69/10B01D71/02B01D71/025B05C3/10B05C9/14B05C13/02B05D1/18B05D3/0218B05D3/0254B01D2323/26
Inventor 张伟杨东亮樊震坤王磊李泉张超孟凡鹏张健
Owner 上海硅苑膜科技有限公司
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