Membrane coating apparatus and method of inorganic microfiltration membrane
A technology of microfiltration membrane and coating membrane, applied in the field of microfiltration membrane, can solve the problems of reducing the permeation flux of inorganic membranes, reducing the qualified rate of finished products, blocking pores, etc. The effect of continuous control of production
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Embodiment 1
[0032] As attached in the manual figure 1 As shown, the acid and alkali required for isoelectric point adjustment are placed in the isoelectric point adjustment device 11 (5L glass bottle, provided with a drop control valve) in advance, and the prepared coating solution 5 is placed in the coating solution preparation tank 1 ( 15L, 316L stainless steel), install the support body 4, turn on the pump 2 (32FS-8 corrosion-resistant centrifugal pump, Shanghai Qiantao Electromechanical Equipment Co., Ltd.), turn on the manual control valve A8, and adjust the flow rate to meet the Flow rate demand (LZS-50D flowmeter, Zhejiang Yuyao Industrial Automation Instrument Factory), turn on the temperature control device 12 to adjust the temperature to be stable, open the control valve on the isoelectric point adjustment device 11 to add acid (or alkali) dropwise, and adjust the pH to the target value, start the supporting body clamping and rotating device 3, and start coating after completio...
Embodiment 2
[0034] Utilize the film coating equipment and method of the present invention, on the support body 4 of average pore diameter 2.58 μ m, the inorganic membrane of average pore diameter 0.15 μ m has been prepared, and the pore diameter is relatively uniform, and the interception rate to target particle is high, and the penetration rate of coating film particle of this device The reduction effect is as shown in the attached picture of the manual figure 2 , image 3 shown. Depend on figure 2 It can be seen that before the isoelectric point adjustment device is used, the particles in the coating solution penetrate into the channel of the support body more obviously, but after the device is used to coat the film, the image 3 Among them, there are almost no particles entering the pores in the support body 4, and the infiltration amount of the coating particles into the pores is significantly reduced.
Embodiment 3
[0036] Using the film coating equipment and method of the present invention, an inorganic membrane with an average pore diameter of 0.23 μm was successfully prepared on a support 4 with an average pore diameter of 2.77 μm, and the pore diameter is very uniform. Figure 4 It is the SEM image of the surface of the prepared ceramic membrane. It can be seen that the particle size screened by the flow rate is very uniform and the sphericity is also good. Figure 5 It shows that the pore size distribution measured by the gas bubble pressure method shows that more than 95% of the pore sizes are concentrated in the range of 0.21-0.25, and the pore size distribution is very uniform.
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