Device of optimizing membrane distillation process by swirling motion
A technology of vortex flow and membrane distillation, which is applied in the direction of total evaporation, membrane technology, semi-permeable membrane separation, etc., can solve the problems of membrane fouling and membrane flux decline, so as to improve membrane flux, increase fluid turbulence, reduce The effect of pressure loss
Active Publication Date: 2017-07-14
JIANGSU UNIV
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Problems solved by technology
[0006] The present invention aims to solve the problem that the membrane flux decreases due to temperature polarization and concentration polarization during the membrane distillation process.
Method used
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Effect test
Embodiment 1
[0026] Embodiment 1 is combined with attached figure 1 figure 2 , first close the feed liquid outlet valve 9, open the exhaust valve 12, feed the liquid into the feed liquid inlet 2 and enter the device, observe through the liquid level observation port 8, when the feed liquid in the device reaches the specified water level, close the feed liquid outlet valve 9 And the exhaust valve 12, the feed liquid in the device will produce a vortex in the feed liquid due to the excessive central flow rate and the joint action of the bottom shell 6 and the deflector I10. Adjust the inlet flow and the feed liquid outlet valve 9 to keep the feed liquid always at a stable level.
Embodiment 2
[0027] Embodiment 2 combines attached image 3 , 4 feed liquid inlets 2 are set on the shell 1, and a deflector II13 is installed at the inlet, so that the feed liquid flows into the device at a certain angle, which is conducive to the formation of the vortex. The rest of the elements are consistent with Embodiment 1.
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Abstract
The invention belongs to the technical field of membrane distillation water treatment and in particular relates to a device of optimizing a membrane distillation process by swirling motion. The device comprises a housing, a hollow fiber membrane, a feed liquid inlet, a feed liquid outlet, a permeate side inlet, a permeate side outlet, a feed liquid outlet valve, a bottom shell, a flow guide sheet, a bracket, an exhaust valve and a liquid level observation port. The device applied to a membrane distillation system can manufacture a vortex in a membrane assembly, so that disturbance of the membrane surface is enhanced; on the one hand, the temperature boundary layer and the concentration boundary layer are damaged, so that the heat transfer and mass transfer process in the membrane distillation process are strengthened; on the other hand, the vortex can take away particles on the surface of the membrane and at the dead corners of the membrane assembly. The device has a wide application prospect.
Description
technical field [0001] This patent belongs to the technical field of membrane distillation water treatment, and specifically designs a device that utilizes vortex flow to optimize the membrane distillation process. Background technique [0002] The situation of fresh water resources in China is very severe, and seawater desalination is an effective way to solve the shortage of water resources. The membrane distillation process is a separation process that combines membrane technology and membrane distillation. The membrane in the membrane distillation process is hydrophobic, and the membrane only allows water vapor to pass through without being wetted by the feed liquid. The basic principle of the membrane distillation process is that the volatile components in the feed liquid pass through the membrane pores of the microporous hydrophobic membrane under the push of the vapor pressure difference on both sides of the membrane, and condense on the other side of the microporous ...
Claims
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IPC IPC(8): B01D61/36C02F1/44C02F1/04
CPCB01D61/364B01D61/366C02F1/447
Inventor 金煜田程友颜学升
Owner JIANGSU UNIV