Please tell me about the role of spraying methanol before washing the crude gas into the heat exchanger?
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I would like to ask, what effect does this methanol spray have besides lowering the freezing point?
Spraying methanol is not to lower the freezing point, but to remove water from the gas and prevent the gas temperature from being too low before entering the absorption tower and freezing the heat exchanger.
I know this principle. What I want to know is whether spraying methanol has other effects, such as moistening the inner wall of the pipe, allowing the water to be more fully absorbed, and reducing corrosion of the pipe.
In addition to lowering the freezing point, it can also be used as a de-icing medium after the wound heat exchanger freezes.
There seems to be no data indicating other functions.
The role of spraying methanol: Because the raw material unit precooler operates at low temperature, if the conversion gas directly enters the raw material unit precooler and is cooled, the saturated water vapor it carries will condense and precipitate water, and the water will freeze and block the equipment and pipelines. Spraying methanol traps water and lowers the freezing point of water, which prevents the water from freezing and clogging the gas channels. The role of spraying in advance before driving: Spray methanol is put into use first to ensure that a certain methanol liquid layer is formed in the pipelines, methanol washing towers and methanol separation tanks. At the same time, the walls of the equipment and pipelines are fully moistened to ensure that the condensed water and methanol can be fully mixed everywhere after air connection.