Hollow plate ceramic membrane and preparation method thereof
A technology of ceramic membrane and flat membrane, applied in the field of preparation of hollow flat ceramic membrane, can solve problems such as insufficient service life of organic membranes, and achieve the effects of extending service life, high mechanical strength and reducing cleaning times
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[0036] Example 1
[0037] Hollow flat ceramic membrane, its structure is as attached figure 1 As shown, the structure includes a microporous membrane 1 and a supporting body 2. The microporous membrane 1 and the supporting body 2 are processed by using spherical alumina production waste as the main raw material.
[0038] Support body 2, hollow thin plate structure, with square through holes, square hole size is 3~5*3~5mm, channel wall thickness is 1.5mm, porosity is 30~50%, pore size distribution is 0.5~5μm.
[0039] The microporous membrane 1 is integratedly attached to both sides of the supporting body 2 after sintering, the porosity is 50-60%, and the pore size distribution is 0.01-0.5 μm.
Example Embodiment
[0040] Example two
[0041] A method for preparing a hollow flat ceramic membrane, the steps include:
[0042] S1. The support body is made of spherical alumina: the spherical alumina waste is screened by hydrocyclone to obtain 3-50μm material, and the ball mill is used for shaping. After shaping, the D50 particle size is D1, and D1 takes the value [5, 20] . In this embodiment, D1=3μm;
[0043] The microporous membrane is prepared with spherical alumina: the spherical alumina waste is sieved by hydrocyclone, and the 3-10μm material is obtained, and the ball mill is shaped. After shaping, the D50 particle size is D2, and D2 takes the value [0.3, 3]. In this embodiment, D2=0.3μm;
[0044] S2. Preparation of the supporting body: in parts by weight, the raw materials of the supporting body include 60 parts of ceramic aggregate, 5 parts of 0.5μm starch, 1 part of methylcellulose, 1 part of polyethylene glycol, and 10 parts of water. The ceramic aggregate includes 78 parts of spherical a...
Example Embodiment
[0071] Example four
[0072] A method for preparing a hollow flat ceramic membrane, the steps include:
[0073] S1. The support body is made of spherical alumina: the spherical alumina waste is screened by air swirling, and the material of 3-50μm is obtained, and the ball mill is shaped. After shaping, the D50 particle size is D1, and D1 takes the value in [5, 20] . In this embodiment, D1=15μm;
[0074] The microporous membrane is prepared with spherical alumina: the spherical alumina waste is screened by air cyclones and hydrocyclones to obtain 3-10μm materials, which are shaped by a ball mill. After shaping, the D50 particle size is D2, and D2 takes the value [0.3 , 3]. In this embodiment, D2=3μm;
[0075] S2. Preparation of the supporting body: in parts by weight, the raw materials of the supporting body include 76 parts of ceramic aggregate, 13 parts of 1μm graphite powder, 8 parts of polyacrylamide, 3 parts of polyethylene glycol, and 16 parts of water. The ceramic aggregate i...
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