GB356071A - Improvements in and relating to heaters suitable for gaseous fluids - Google Patents

Abstract

356,071. Heating air and gases. FOLLIET, A. and SAINDERICHIN, N., 2, Rue Chernoviz, Paris. Dec. 30, 1930, No. 39200. Convention date, Dec. 30, 1929. [Class 64 (i).] A gas heater in which the gas traverses a number of tubes arranged in parallel planes is heated by hot gases issuing from elongated slots which direct the heating gases in thin sheets, the planes of which alternate with and are parallel to the vertical planes of the bent tubes, so that the thin sheets of gas heat the tubes by radiation. The gases to be heated flow through a series of tubes 4 arranged in two sets in parallel from inlet 2 to outlet 3, the tubes being contained within successive heating chambers 25, 23, 21 and connected therein by pipes 28, 29, 30. Headers 16 transfer the gases between lateral tubes, the headers being secured in any one set by a tube plate 17. Hot gases from a furnace 6 mixed with secondary air from duct 9 in chamber 7, pass through the nozzle-like slots 11 into the heating chamber 21. Further secondary air from valve 12 enters the chamber through saw-cuts 14 in refractory tubes 13 ; bars 15 assist in distributing the gases. The latter pass upwards in chambers 21, 25, downwards in 23 and chamber 19 to outlet 27 leading to the chimney. One of the branches of the tubes 4 may be curved in a vertical plane.