How do you locate leaks in a negative pressure system?
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The gas treatment unit is under partial negative pressure, with the pressure ranging from 0 KPa at the source of the process to -10 KPa at the pump inlet, which results in a 3% decrease in the purity of the gas. It is currently in operation. Does anyone have any methods for identifying leaks in the entire negative pressure system, including pipes, wash towers, shell-and-tube heat exchangers, mist collectors, drying towers, bubble columns, etc.? I would appreciate your advice.
Let’s start with the flanges of the pipes. A simple way to do this is to cover them with plastic bags; in the case of negative pressure, the plastic bags will be pulled tight against the pipes...
2# has already been answered; we usually use film, as it’s simple and convenient
Learn from floors 2-3-4* – simple and practical.
Is this method also used for the head flange of the tower? Are there any other simpler ways?
It means the same thing; it’s just suggested that after securing the entire flange, airtightness testing should be carried out under positive pressure first, and only then should the actual operations begin