FIELD SERVICE HEATER Russian patent published in 2012 - IPC F24H3/00 

FIELD: heating.

SUBSTANCE: invention refers to devices designed for heating of liquids, gases and their mixtures, and can be used in various branches of industry to provide technological processes, for example for heating of natural gas. Field service heater includes burner device, shell-and-tube heat exchanger having an external bank of heat exchange tubes, and at least one internal bank of heat exchange tubes, a stack, heated medium inlet and outlet headers; each heat exchange tube represents a set of two tubes - external tube with a blind end and internal tube with an open end respectively, which face the burner device and form external and internal cavities; at that, external cavity is interconnected with inlet header and internal cavity is interconnected with outlet header of heated medium. Inside shell-and-tube heat exchanger in its upper part there arranged is at least one ceiling section of heat exchange tubes, which is located throughout the length of heat exchanger or along some part of it. Heat release intensifiers are made in the form of formings on walls of heat exchange tubes, or in the form of a twisted belt on walls of heat exchange tube, or in the form of corrugations.

EFFECT: improved reliability and economy of heater operation.

8 cl, 7 dwg