What are the key control points for ion membranes? Please provide as much detail as possible, especially those related to membrane safety
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This post was last edited by sunjl1981 on 2013-1-6 at 20:15. What are the key control points for ion exchange membranes? Please provide as much detail as possible, especially regarding membrane safety. Our company uses 2.7-cell ion exchange membranes produced by Beihua Machinery, as well as membranes from Japanese company Asahi Kasei. Those who have experience in managing Beihua Machinery’s ion exchange membranes are welcome to share their insights on membrane safety management; I would be very grateful! I’ve heard that some manufacturers manage their operations poorly, which leads to membrane damage; therefore, I’m really looking forward to any advice you might have. Thank you! This post was last edited by yzhms on 2009-3-3 17:37 ] # ， ， &
Let’s discuss it: 1. Hydrochloric acid pressure difference； 2. Hydrogen contained in chlorine ； 3. Anode solution concentration ； 4. Outlet anode pH ； 5, etc.
Quality of secondary brine, chlorine-hydrogen pressure; filling operations are crucial, as well as the pressure difference in the liquid phase
The main parameters affecting ion exchange membranes: 1. Quality of the saltwater used for secondary purification; 2. Flow rates of the saltwater entering the cell and the alkali used in circulation; 3. Pressures of hydrogen and chlorine, as well as the pressure difference between them; 4. pH values of the saltwater entering and leaving the electrolyzer; 5. Concentration of the saltwater entering the cell; 6. And so on. This post was last edited by yzhms on 2009-3-1 01:48
1. Quality of secondary brine 2. Chlorine-hydrogen pressure difference 3. Hydrogen content in chlorine 4. Salt content in alkali 5. Equilibrium voltage 6. Coloring of the anode hose 7. Voltage of the cell tank. Last edited by yzhms on 2009-2-28 13:29.]
The quality of the secondary brine, the chlorine-hydrogen pressure difference, and the stable operation of the installation
The main parameters are: 1. the quality of the second-stage refined brine (such as its concentration, temperature, and impurity content); 2. whether the filling process follows the established procedures; 3. whether the pressures in the hydrogen and chlorine main pipes, as well as the pressure difference between hydrogen and chlorine, remain stable； 4. How much acid should be added to the anode, and what are the pH values of the saltwater as it enters and exits the electrolyzer? ； 5. Pay attention to the voltage and current levels in the slot during operation.
1. Saltwater quality and pH 2. Pressure and pressure difference 3. Alkali concentration and salt concentration 4. Reducing the number of start-up and shutdown cycles 5. Temperature 6. Polarization current. By the way, what is ETC? lol. Last edited by yzhms on 2009-3-1 01:49.]
My apologies; it’s an abbreviation for E-wen, with similar meanings. Hehe.
1. Hydrochloric acid pressure difference； The chlorine-hydrogen pressure difference is a general concept; for a long time, attention has been paid to maintaining this pressure difference during normal operation, while its maintenance during emergency shutdowns in case of accidents is often overlooked. In most cases, during an emergency shutdown, chlorine is released through the water seal for treatment as hazardous gas, whereas hydrogen is discharged directly into the atmosphere via the vent piping. As a result, the chlorine-hydrogen pressure difference in the electrolyzer does not remain within the designed range, which can lead to damage to the electrolyzer’s electrodes or membranes under such accident conditions!
Based on practical production experience, the high positive and negative pressures that occur during startup and shutdown can easily damage the electrolyzer and membranes; therefore, it is crucial to regulate and control the chlorine-hydrogen pressure. Most manufacturers are able to manage other factors quite well.
The topic is too broad, in my opinion； All processes and equipment are designed to ensure the safety and efficiency of the membrane. The processes include: electrolysis (including electrolytic cells), chlorohydrogen treatment, high-purity acid, brine purification, secondary purification, rectified electricity, emergency power, DCS, and auxiliary systems. Hehe, this post was last edited by pzhhuagong on 2009-3-3 at 15:01.]