Low-temperature methanol washing, water washing, desalinated water? Fire water?
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Let’s discuss this: For low-temperature methanol washing, it’s of course fine to use deionized water, but is it possible to use fire-fighting water for this purpose? Is there any harm from using fire-fighting water?
:) ,:handshake
Deionized water wash~! Fire water cannot be used for extinguishing fires; it is not desalinated, and it contains chloride ions that can corrode steel-based equipment
Either fire water or demineralized water can be used; demineralized water is the best option, but it’s too expensive； Firefighting water is generally water that has undergone preliminary treatment; no chemicals are added to it, and it does not contain chloride ions
Can we start by using desalinated water? Once the circulation system is established, we can use both fire water and desalinated water for replenishment when discharging water; using only desalinated water is too slow. I will soon face this problem; please share your experienced insights.
Our initial plan was to use demineralized water, but it was later found that using it was too slow and affected the progress of starting up the system; so we switched to fire water instead – it’s no problem.
Firefighting water is used to carry out water-related testing; due to the short duration of such tests, it is not possible to detect the potential damage it may cause to the system (mainly equipment corrosion). However, if firefighting water is used as the washing water in the exhaust gas scrubber, this will lead to severe corrosion of the components inside the tower over time. The most obvious sign of this is frequent clogging of the filter at the inlet of the scrubber pump at the bottom of the tower! ! Whether it is a water-driven commissioning test or a cleaning of the system during major maintenance, it is best to use deionized water (at 10 kilograms of pressure and at a relatively high flow rate). When designing our company’s low-temperature methanol washing system, 10 kg of deionized water was used. However, since the pressure in the pipeline network was only 5 kg, the water supply rate during the system’s hydraulic testing was too slow; therefore, fire water was used instead! Furthermore, due to the low pressure of the desalinated water, in order for the methanol content in the exhaust gas at the top of the exhaust gas scrubber to meet the design specifications, the actual flow rate required is much higher than the designed flow rate! ! It causes water waste! !