Selection of valves for the brine purification system
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This post was last edited by sunjl1981 on 2013-1-6 at 23:42. The purification of saline water involves removing impurities from it, and this process inevitably results in the formation of precipitates. Moreover, saline water is saturated, which makes crystallization easy to occur. Most of the valves used are rubber-lined or fluorine-lined butterfly valves; however, these valves often experience internal leakage due to salt crystals or calcium carbonate scaling, which creates significant problems when maintaining pumps. Additionally, frequent valve replacements increase overall production costs. Please share your experiences so that we can all learn from each other: handshake.
This phenomenon is probably common in the industry; our unit is no exception. What we do is to avoid replacing those faulty valves (those that are corroded must be replaced), and instead we focus on improving the maintenance of pump equipment. For key pieces of equipment, we shift from a reactive to a proactive approach, that is, we carry out regular inspections on these critical devices whenever possible, thereby avoiding reactive repairs during production. This post was last edited by wanhonghui1111 on 2008-3-25 14:30.]
Are you also using butterfly valves? Which is better, those lined with fluoroplastic or those lined with rubber? What are their advantages and disadvantages?
It is recommended to use diaphragm valves. If crystallization occurs in the saturated salt water, the diaphragm valve can crush the crystals when opening and closing, thereby maintaining a tight seal. However, diaphragm valves have a temperature limit, with a maximum temperature of 150~175 degrees.
I agree with the comment above as well. Although diaphragm valves are expensive, they have significant advantages when used as isolation valves at the inlet and outlet of pumps. Glanded valves, whether lined with rubber or fluoroplastic, tend to not seal properly, which prevents maintenance of the backup equipment! ! !
I recommend against using diaphragm valves in the section from the brine tank to the preprocessor; in this area, the brine contains a high amount of solid impurities, and prolonged cleaning of the diaphragm can easily lead to leaks. This, in turn, affects the stability of the flow rate entering the preprocessor and has a direct impact on the clarification of the brine. We use globe valves instead
Our unit previously used single-plate copper-core gate valves, which worked very well
What valves are being used now? Are all of them single-plate gate valves (including those at the pump’s inlet and outlet)?
Do you use diaphragm valves in saline water? But diaphragm valves can also experience internal leakage due to salt crystals, right?
I still need to learn well on the equipment*. Thank you all