RU2003002C1 - Recuperator - Google Patents

Abstract

The use is intended to utilize the flue gas heat of industrial flame furnaces to heat combustion air. SUMMARY OF THE INVENTION: flue gases with a temperature of 1100-1200 ° C, while the high-pressure fan delivers cold air to the upper nozzle 4 Two internal partitions 3 in a metal box 2 organize a complex multi-way air movement, which is a combination of cross current with a flow, which allows to reduce the maximum temperature of the heat exchanger wall and intensify heat transfer Refractory inserts 9 along the entire length protect the metal heat exchange tubes 6 and the tube plate 7 from the effects of fumes of chloride and fluoride salts contained in the flue gases In addition, the refractory inserts 9 made in the form of rings are installed in the upper 7 and lower 8 boards freely and have a certain height h equal to (0.5 - 0.1} D, where D is the inner diameter of the heat transfer pipe. In this case, the upper inserts extend beyond the upper board 7 by (0.5 - 0.8) D. and their outer and inner diameters are respectively (0.95 - 0.98) D and (0.7 - 0.85) D 2 il

Description

Table 1

Insert height selection

The choice of the height of the ledge above the upper board

Insert diameter selection

Table 2

Table 3

Claims (1)

The claims RECOVEROR, comprising upper and lower tube boards with holes and heat exchanger tubes installed in the duct, provided with coaxially arranged refractory inserts in the latter, characterized in that, in order to increase reliability by protecting the heat exchanger tubes from overheating and exposure to aggressive constituents Continuation of Table 3 coolant, annular grooves are made in the holes of the lower board, inserts are placed along the entire length of the heat transfer tubes, inserted into the grooves of the lower board and beyond the upper board and the size is 0.5 - 0.8 lengths of the inserts, the latter being made with a length of 0.5 + 1.0 of the inner diameter of the pipe and the outer and inner diameters of 0.95 - 0.98 and 0.7 - 0.85 of the inner diameter of the heat transfer pipes, respectively.