Module of chemical plant constructed in the workshop for erection as a single unit

摘要

Design of a module, for example a distillation column, which is constructed in the workshop to reduce the number of lifting operations required on site. The inner structure of the module, with its ancillary equipment already fitted, is slid into the outer supporting structure and the module is taken to site as a single unit. Process for making a module (33) by assembling an inner structure to contain fluid (1), and outer structure (2) surrounding the inner structure, and equipment (12, 13, 14, 15, 16, 17, 27) at least on the inner structure. The inner structure is intended to form part of a fluid supply installation. At least the inner structure is pre-equipped with at least some equipment before sliding it into the outer structure along the axis of the module. The outer structure is also pre-equipped with equipment before the sliding operation. The inner structure is intended to contain a fluid at a temperature significantly different from ambient, and at least part of the equipment installed on the inner or outer structure is at the same temperature. The inner structure is slid along rails in the outer structure during the sliding operation. The inner structure is cryogenic and the outer structure is a thermally insulating envelope. The inner structure is a distillation column and the outer structure provides its support. Process of constructing such a module on site, erecting the whole module in a single operation.