CN213853920U

CN213853920U - Ceramic filter membrane

Info

Publication number: CN213853920U
Application number: CN202022515875.9U
Authority: CN
Inventors: 刘金治; 刘君基; 胡建文
Original assignee: Yangzhou Runming Intelligent Equipment Co ltd
Current assignee: Yangzhou Runming Intelligent Equipment Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-08-03
Anticipated expiration: 2030-11-04

Abstract

The utility model discloses a ceramic filtering membrane which is disc-shaped and is used in a tangential flow filtration mode; the surface of the ceramic filter membrane is a filter layer, and the filter layer comprises a support layer, a transition layer and a separation layer; the separation layer is positioned on the surface of the filter membrane, and the transition layer is positioned between the support layer and the separation layer; the ceramic filter membrane is provided with a pore structure communicated with each other in a three-dimensional space, and the pore structure comprises a longitudinal channel; the longitudinal channel is linear or spiral; the center of the ceramic filter membrane is provided with a confluence port. The annular channel is at least two layers; the support layer is used as a carrier of the membrane and is formed by sintering large particles. The utility model discloses ceramic filtration membrane separation precision is high, high temperature resistance can be good, both can be used to traditional filtration mode, is applicable to the cross-flow filtration mode again, and is difficult for forming the pollution at the face of membrane, has effectively alleviateed the phenomenon of membrane field concentration polarization, keeps the long-term stable high treatment flux of system.

Description

Ceramic filter membrane

Technical Field

The utility model relates to a ceramic membrane especially relates to a ceramic filtration membrane.

Background

The ceramic membrane separation technology has a plurality of functions of separation, concentration, purification and the like, and has a series of advantages of high efficiency, energy conservation, environmental protection, simple molecular level filtration and filtration process, easy control and the like, so the ceramic membrane separation technology can be widely used in the fields of food industry, beverage industry, wine industry, tea deep processing, plant extraction, medicine deep processing, aloe juice, fruit juice, vegetable juice, dairy product industry, traditional Chinese medicine, health care products, seasonings, food additives, agricultural product deep processing, biological medicine, fine chemical industry, water treatment industry, environmental engineering and the like.

However, the filtering holes in the traditional filtering mode adopted at present are easy to block, the efficiency is low, the transparency is low, the sterilization is not thorough, the continuous production cannot be realized, the labor intensity is high, and the product quality is low.

Therefore, a new filtering membrane is needed for the concentration, desalination, separation, purification, clarification, sterilization processes of the feed liquid, and for the solid-liquid separation, clarification, filtration, sterilization, impurity removal, demulsification and oil removal.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to the weak point among the prior art, the utility model provides a pottery filtration membrane, this filtration membrane is difficult for blockking up the filtration pore and be difficult for adsorbing on the diaphragm.

The technical scheme is as follows: the ceramic filtering membrane of the utility model is disc-shaped; the surface of the ceramic filter membrane is a filter layer, and the filter layer comprises a support layer, a transition layer and a separation layer;

the separation layer is positioned on the surface of the filter membrane, and the transition layer is positioned between the support layer and the separation layer;

the ceramic filter membrane is provided with a pore structure communicated with each other in a three-dimensional space, and the pore structure comprises a longitudinal channel; the center of the ceramic filter membrane is provided with a confluence port; the filtration mode of the ceramic filtration membrane is tangential flow filtration.

The longitudinal channel is linear, the pore structure also comprises an annular channel, the longitudinal channel can be used for a traditional filtering mode and is also suitable for a novel cross flow filtering mode, and pollution is not easy to form on the membrane surface.

The number of the annular channels is at least two, and the filtering area of the filtering membrane is the maximum filtering area in the equivalent volume.

The longitudinal channels are helical to enhance the filtering effect.

The support layer, which is a support for the membrane, is sintered from large particles and is several millimeters thick, serves as a support for the membrane and protects the mechanical strength of the membrane.

The separating layer is positioned on the surface of the filtering membrane, is thin, micron-sized, small in pore size and narrow in distribution, and further plays a role in filtering and separating.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

(1) the ceramic filtering membrane of the utility model has high separation precision, adopts a plurality of filtering grades, and has no change in interception performance after long-term operation; the filtering pore size range is 0.05-8 μm, and the filtering membrane with corresponding filtering pore size can be selected according to the difference of the viscosity and the suspended matter content of the feed liquid, so as to achieve the purposes of clarification, impurity removal and separation.

(2) The porosity is high, the pore size distribution is uniform, the filter pores are not easy to block, the filter precision is high, the flux is large, the long-term stable operation under high flux can be maintained, and the quality of the prepared product is excellent.

(3) The pollution resistance is strong, no secondary dissolved matters are generated in the separation process, and the product quality is guaranteed. The membrane disc is easy to clean and good in recoverability. The disc-type ceramic membrane is prepared by a special process at high temperature, so that the ceramic membrane hole is not swelled due to the fact that the ceramic membrane hole is in a high-temperature state for a long time or in an acid and alkali system.

(4) The ceramic filtering membrane of the utility model has good high temperature resistance, can treat high temperature liquid, and uses steam back flushing regeneration and high temperature in-situ disinfection and sterilization; high mechanical strength, wide pH application range, acid resistance, alkali resistance, organic solvent resistance and good oxidation resistance.

(5) The utility model discloses ceramic filtration membrane both can be used to traditional filtration mode, is fit for neotype cross-flow filtration mode again, is difficult for forming the pollution at the face of membrane, can effectively alleviate this ubiquitous phenomenon of membrane field concentration polarization, keeps the long-term stable high treatment flux of system.

(6) The utility model discloses ceramic filtration membrane can resume the membrane performance completely in the short time through simple and convenient washing, and membrane regeneration performance is extremely strong, and washs with low costsly. The ceramic membrane has long service life which is several times or even dozens of times of that of the membrane made of organic materials.

Drawings

FIG. 1 illustrates a prior art filtration approach;

FIG. 2 is a schematic diagram of the tangential flow filtration of ceramic membranes of the present invention;

FIG. 3 is a front view of a first embodiment of the ceramic filter membrane of the present invention;

FIG. 4 is a cross-sectional view of a ceramic filter membrane according to a first embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a filter layer of the ceramic filter membrane;

fig. 6 is a front view of a second embodiment of the ceramic membrane of the present invention.

Detailed Description

Example one

As shown in fig. 1 to 6, the ceramic filtering membrane of the present invention is disc-shaped, and the upper and lower surfaces of the filtering membrane are both filtering layers c, i.e. a double-sided filtering manner is adopted. The ceramic filter membrane is internally provided with a longitudinal channel a and an annular channel b, and the longitudinal channel a is linear. The center of the ceramic filter membrane is provided with a confluence port d. The filtration mode of the filtration membrane adopts tangential flow filtration, also called cross flow filtration mode, the high-speed operation of the filtration membrane enables the feed liquid to form precipitation tangential flow on the surface of the membrane, under the action of pressure and the tangential flow, the high-concentration material is diffused to the wall of the container, the low-concentration solution flows to the middle, and the feed liquid is filtered and discharged.

The number of the annular channels is at least two, and the filtering area of the filtering membrane is the maximum filtering area in the equivalent volume. The disc ceramic filter membrane has a pore structure communicated with each other in a three-dimensional space, and the uniform pore size distribution of the disc ceramic filter membrane provides good selective permeability and adsorption performance.

As shown in figure 3, the disc ceramic filtering membrane of the utility model is formed by firing under high temperature condition, and is a porous solid continuous medium with sieving and filtering functions. The filter layer is asymmetric and comprises a support layer c1, a transition layer c2 and a separation layer c 3. Wherein the separation layer is positioned on the surface of the filter membrane, and the transition layer is positioned between the support layer and the separation layer.

The specific structure of the filter layer is that the support layer c1 is formed by sintering larger particles, is several millimeters thick, and is used as a membrane carrier for protecting the mechanical strength of the membrane. The separating layer c3 is arranged on the surface of the filtering membrane disc, has thin thickness, micron order, small pore size and narrow distribution, and plays a role in filtering and separating. There is also a transition layer c2 of multilayer construction between the separating and support layers of the membrane.

Example two:

as shown in fig. 4, the difference between the second embodiment and the first embodiment is that the second embodiment adopts a longitudinal channel a for filtration, and the longitudinal channel a is spiral, so as to enhance the filtration effect.

Claims

1. A ceramic filtration membrane characterized by: the ceramic filtering membrane is disc-shaped;

the surface of the ceramic filter membrane is a filter layer (c) which comprises a support layer (c1), a transition layer (c2) and a separation layer (c 3);

the ceramic filter membrane is provided with a pore structure communicated with each other in three-dimensional space, and the pore structure comprises a longitudinal channel (a); the center of the ceramic filter membrane is provided with a confluence port (d); the filtration mode of the ceramic filtration membrane is tangential flow filtration.

2. Ceramic filter membrane according to claim 1, wherein: the longitudinal channels are rectilinear.

3. Ceramic filter membrane according to claim 2, wherein: the tunnel structure further comprises an annular channel (b).

4. A ceramic filter membrane according to claim 3, wherein: the number of the annular channels (b) is at least two.

5. Ceramic filter membrane according to claim 1, wherein: the longitudinal channel is helical.

6. Ceramic filter membrane according to claim 1, wherein: the support layer is used as a carrier of the membrane and is formed by sintering large particles.

7. Ceramic filter membrane according to claim 1, wherein: the surface of the ceramic filter membrane adopts a double-sided filtration mode.

8. Ceramic filter membrane according to claim 1, wherein: the thickness of the separation layer is micron-sized.