For chemical wastewater treatment plants—are there any decent valves for evaporator systems? The ones we’ve been using have not been good; let’s discuss it
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Hello everyone. There are several types of evaporators, and the discharge valves used under thick-bottomed reactors, as well as the valves for self-circulating discharge and those with rotary motion, have not been performing well over time. Fluorocarbon-lined ball valves and 2205 soft-seal ball valves suffer from corrosion and erosion after half a year to a year of use; even titanium hard-seal ball valves have been employed, but they became stuck after one year of use. I would like to know how other professionals in this field are dealing with this issue, and if there are any good solutions available The valve factory has relevant usage records, which can also be discussed; you can send a private message.
This post was last edited by wx_NMOAE on 2023-1-2 at 14:40. You need to specify what types of media are involved and the operating conditions. So as to determine what material to use
This post was last edited by Instrumentation and Control Design on 2022-12-7 at 12:55. There are several types of evaporators (multi-effect, single-effect, MVR), and the materials involved are high-concentration solutions of sodium chloride, sodium sulfate, calcium chloride, and magnesium chloride. The discharge valves used in thick liquids, as well as the self-circulating discharge systems and rotary valves, have not performed very well over time. Fluorocarbon-lined ball valves and 2205 soft-seal ball valves have been used; after half a year to a year, corrosion and wear caused by particle erosion occurred. Even titanium hard-seal ball valves were tried, but those made of titanium became stuck after one year of use. Once every little over a month, soak in hydrochloric acid at a temperature of 50-70 degrees for 16 hours
Fluorinated-lined ball valves are corrosion-resistant but not wear-resistant or resistant to erosion. Titanium valves offer excellent overall performance, yet the presence of particles can cause sticking issues. The valve selection process needs to be optimized; appropriate materials and specific manufacturing processes should be chosen based on the operating conditions in order to achieve the best cost-performance ratio
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