Which coil-type heat exchanger in the methanol washing system is prone to clogging?
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Please share your thoughts: in actual production, in which locations are heat exchangers prone to clogging?
In situations with high load and low flow rate, gas blockage is likely to occur in the E6 heat exchanger! A high water content in methanol can easily cause impurities to clog the pipes of the E7 heat exchanger!
Water coolers are prone to clogging; if the circulating water is not properly treated, sediment can easily get in, which affects the heat exchange efficiency!
The original post was published by lw37062370 on 2009-3-6 at 14:32: Gas blockage is likely to occur in E6 heat exchangers under conditions of high load and low flow rate! A high water content in methanol can easily cause impurities to clog the pipes of the E7 heat exchanger! [/quote] I would like to ask: What is the reason why a high water content in methanol can cause blockages in E7?
Generally, it is used in the methanol-depleted heat exchanger of the thermal regeneration tower (for heat exchange with the methanol-rich stream entering the tower) and at the bottom of the hydrogen sulfide concentration tower for methanol
What is meant by the second floor is that a high water content accelerates the rate of corrosion in the system; the corrosive substances present in the scrubber tower end up in E7 along with the methanol-rich fluid, which can lead to blockages!
However, there have not been many cases of blockages in heat exchangers such as E6 and E7; most occurrences take place in the coil-type heat exchangers E10 and E9 located in the hot zone and at the boundary between hot and cold areas. The main reason for this is that corrosive substances in the system dissolve easily at low temperatures, but condense into flocs at high temperatures, thereby sticking to the inside of the coils and causing blockages over time!
1. The filters in cold and hot areas differ because the viscosity of methanol varies at different temperatures; hence, a filter with a lower mesh count is used in the low-temperature area, while one with a higher mesh count is used in the high-temperature area. Is it because corrosive substances dissolve more easily at low temperatures, reducing the viscosity of methanol, and form flocs more easily at high temperatures, thereby increasing its viscosity? 2. How should we understand the fact that corrosive substances dissolve more easily at low temperatures? Please advise
The lower the temperature, the greater the solubility. . . . What kind of substances are they? ? I have a question: L :L
I think the main things filtered out in the cold zone are catalyst dust and carbon black [some also say hydroxyl iron and hydroxyl nickel]； The hot zone mainly consists of sulfides and rust, among other things, with relatively large particles!
How long does a low-temperature methanol washing unit typically operate before it requires major maintenance? What are the aspects of this maintenance, and how is it carried out?