EXTRACTABLE EXCHANGE UNITSEXTRACTABLE EXCHANGE UNITS

In this kind of boilers all heat exchange units are extractable, even vaporizers, without having to cut pressure parts and therefore without the need to call in the Inspectorate Agency.

In particular all the layers of vaporizers are the same and consist of a lower feeding header and a collecting top header; they are made as elastic as possible to improve cleaning.

With a cold boiler and hoisting equipment in situ, replacement time for any type of heat exchanger unit is reduced to less than 36 hours.

Hoppers can be removed from the top, after the respective heat exchange unit have been pulled out for maintenance or replacement, without dismantling the dust conveying system (clapets, redlers, etc.).

It should be remembered that, in case of a plant indoors, it becomes vital to provide the necessary space for removing the heat exchange units and accomodate the hoisting equipment (bridge crane) or, in alternative, a shed with a removable or sliding roof and an area for a jib crane.