A device and method for sensitively detecting membrane permeation pressure value in membrane distillation process
A sensitive detection and membrane distillation technology, which is applied in the direction of measuring devices, instruments, surface/boundary effects, etc., can solve the problems of inaccurate and sensitive description, hysteresis of wetting phenomenon, high wetting threshold, etc., and achieves convenient observation, recording and detection methods Simple, easy-to-use effects
Active Publication Date: 2021-07-02
重庆阁林环保科技有限公司
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Problems solved by technology
This method cannot accurately and sensitively describe the local soaking phenomenon in one or several membrane pores, resulting in the hysteresis of the captured soaking phenomenon, that is, the soaking threshold (the driving pressure value of the membrane) is too high
In the operation of the membrane distillation process, if the operating pressure value determined by this method is used, it will cause rapid wetting of the membrane and cause the failure of the entire membrane module
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[0039] Example: see figure 1 , figure 2 , a device for sensitively detecting membrane percolation pressure value during membrane distillation process, comprising a gas storage tank 1, a membrane percolation test assembly 2, a DC power supply 3, a high-sensitivity electric bridge 4 and a diaphragm 5 to be tested. The membrane penetration test assembly 2 includes a metal accommodation cylinder with a closed upper end and an open lower end, and a bottom plate 8 that closes the lower end of the accommodation cylinder. A flange 6 is sheathed on the lower end of the outer side of the container, the flange 6 is made of metal, and is fixedly connected with the container; both the flange 6 and the container are made of metal, so they have good electrical conductivity performance, which is beneficial to the detection of electrical parameters in the detection process. During actual processing, the flange 6 is integrally formed with the containing cylinder, and the lower side of the fl...
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The invention discloses a device and method for sensitively detecting membrane permeation pressure value in membrane distillation process, wherein, the device includes a gas storage tank, a membrane permeation test component, a DC power supply, a high-sensitivity electric bridge and a diaphragm to be tested; the membrane The soaking test assembly includes an accommodating cylinder, a flange plate and a bottom plate, the diaphragm to be tested is located between the flange plate and the bottom plate, and a conductive sheet is arranged between the diaphragm to be tested and the bottom plate; the gas storage tank is reduced The pressure valve, the pressure regulator and the pressure gauge are connected to the storage cylinder; the upper terminal and the lower terminal are also arranged on the upper end of the storage cylinder and the lower side of the conductive sheet, and the DC power supply is connected with the upper terminal and the lower terminal. The connecting posts are connected; two lead posts are distributed on the side wall of the containing cylinder, and the high-sensitivity electric bridge is connected with the two lead posts; the method is to use the above-mentioned device to detect the membrane penetration pressure value. The invention can reflect the membrane wetting phenomenon through the electrical parameter detection of the membrane module, so as to quickly and accurately indicate that the system can bear the maximum operating pressure.
Description
technical field [0001] The invention relates to the technical field of membrane distillation separation, in particular to a device and method for sensitively detecting membrane percolation pressure values during membrane distillation. Background technique [0002] Membrane distillation is an emerging low-energy (such as waste heat, waste heat thermally driven) water treatment process. It is a filtration and separation method based on hydrophobic membrane materials; its process principle is (taking seawater desalination as an example): feed liquid (located in the membrane The water molecules in the heating end, high temperature area) are vaporized by heat, and driven by the partial pressure difference of the vapor on both sides of the membrane, they migrate through the membrane material in the form of steam, and condense in the permeated liquid (located at the other end of the membrane, low temperature area) back to liquid water. Ideally, the membrane material only allows ...
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IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 韩乐董婷韩旻媛姚婧梅李伟
Owner 重庆阁林环保科技有限公司
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