An important component in gas separation plants are the so-called “cold boxes”. Cold boxes are (pressure) vessels that hold a gas or liquid at a very low temperature. The distinctive feature of cold boxes is the double-wall construction, which allows the insulation to be fitted between the inner and outer walls. The cold box is sealed after the insulation has been fitted, so the insulation can no longer come into contact with, for example, water, snow, dust and contaminants.
Choice of insulation
The choice of insulation material depends on a variety of parameters, including the user requirement, standards (e.g. AGI Q118), the operating temperature and the accessibility of the installation. In many cases, mineral wool fibres are used (e.g. ProRox GR 903), which contain a very low proportion of organic substances- the so-called “Linde Quality”. This can be easily injected into the vessel and has a very long lifespan. The material is easily removed for inspection purposes.