SU1627786A2 - Tubular recuperator - Google Patents

Abstract

This invention relates to industrial heat technology and can be manufactured in mechanical engineering and metallurgy. The goal is to increase the efficiency of heat exchange by means of Pochem completely and the uniform volume of the heat exchanger by means of cross-exchange poker posts. The cold air of the legs of gu n.ie i H.I tube boards OCHOUHOIO 1 p additional BEAMS (P). The passage through the pipes (t) 2 p 11, the air is heated by the heat of the gas, moving both the gas duct and the air flow. to the consumer. The setting of the additional P and T II of the perpendicular axes with the ocnoBfo-ni P 1 D 2 provides a complete and uniform sanojinenjic volume of the heat exchanger with the exchange surface. 1 hp f.-ju.i, З ill. with CO (L

Description

3

The invention relates to industrial heat technology, and can be used in mechanical engineering and metallurgy.

The purpose of the invention is to increase the efficiency of heat exchange by more complete and uniform filling of the volume of the heat exchanger with heat exchange surfaces,

Fig, 1 schematically shows the heat exchanger from the side of the tube plates, top view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one,

The tubular heat exchanger contains the main bundle of 1 U-shaped heat exchange tubes 2 installed in the duct 3 with the formation of transverse p

Dov 4 and 5 and fixed with their inputs - 2Q tons. The implementation of the connecting pipes 12 of the U-shaped pipes 2 and 1 1 are tapered to a value of 5-0.6 d pipes 2 and 11, which allows to keep the flow area for the heating gas on

25 is about the same level as in structures with a single tube bundle. With, 6d, the flow area for the heating gas is significantly reduced and the aerodynamic resistance is sharply increased, which is economically unjustified. When h 1.0 1.0, 3d significantly reduces the internal cross section and increases the aerodynamic resistance for the passage of air, which also

and output ends 6 and 7 in tube plates 8. The number of tubes 2 increases from row 4 to row 5 in the direction from the center of the beam 1 to its periphery. The tubular boards 8 are made in the form of isosceles trapezoids, directed by smaller bases towards the center of the beam 1 and connected to the inlet and outlet headers. The recuperator is also provided with an additional beam 9, fixed in its tubular boards 10 U-shaped tubes 11, similar to the main bundle 1 and placed perpendicular to the latter with a tight abutment of mutually reversed sto-acs economically unprofitable. ron of adjacent tube boards 8 and 10 puff-heat transfer efficiency in ancestors 1 and 9. Comparative connections 12 of the straight branches 13 of pipes 2 and 11 are made straight in the middle zone and with splits in the horizontal plane

arranged with alternating alternation of the main and additional beams 1 and 9. The thickness h of the flattened portions of the connecting pipes 12 of the pipes 2 and 11 is 0.5-5 x 0.6 of the diameter (d) of the latter.

The recuperator operates as follows.

Claims (2)

1. Tubular heat exchanger according to ed. St. No. 1239464, characterized by the fact that, in order to increase the efficiency of heat exchange by more complete and uniform filling Cold air two streams pic 1. Tubular heat exchanger according to ed. St. No. 1239464, characterized by the fact that, in order to increase the efficiency of heat exchange by more complete and uniform filling stumbles onto the tube plates 8 and 1 0 of the main 5Q volume of the heat exchanger with heat exchangers and the additional beams 1 and 9. The rass-surfaces, it is supplied with the addition of air between the beams with a 1-piece beam fixed in its 9 is produced in proportion to their pipe plates of the U-shaped pipes, as well as the heating surface. The passage is then through the U-shaped pipes 2 and 11, the air is heated by the heat of the heating (flue) gases moving in the duct 3 and is directed to the consumer. 55 logical main beam and placed perpendicularly to the latter with a tight junction of the interconverted sides of the adjacent tube plates of the main and additional beams, and the connecting pipes of straight lines if the tube boards 8 and 10 form Since the square and both bundles of pipes 1 and 9 have the same heating surface, the air can be supplied to the latter by a single flow. Increasing the number of pipes 2 and 11 from row to row in the direction from the center of the beams I and 9 to the periphery eliminates the uneven distribution in tube loops of various lengths due to a decrease in the flow area for air in tube loops of small length and increasing it in loops large lengths Installing an additional beam 9 of pipes 11 mutually perpendicular to the main beam ensures complete and uniform filling of the volume of the heat exchanger with heat exchanging surface heat exchangers due to more complete and uniform filling of its volume with heat exchange pipes 2 and 11 increases by 25-40%, and for a given heat output of the heat exchanger (volume) decreases by 20-30%. Invention Formula 1. Tubular heat exchanger according to ed. St. No. 1239464, characterized by the fact that, in order to increase the efficiency of heat exchange by more complete and uniform filling tube boards of U-shaped tubes, ana a logical main beam and perpendicularly placed last with a tight junction of the interconverted sides of the adjacent tube plates of the main and additional beams, and the connecting nozzles of the straight wind 515,777,866 Weigh U-shaped tubes are made with 2. The heat exchanger according to claim. I, o tl and scaled in a horizontal plane, considering that the thickness are located with a regular reciprocal with the chick of other parts of the connecting the alternation of the main and add-on-, pipe nozzles is 0.5-0.6 di full beam. 72 the last meter. A-J FIG. I / P A12 FIG. 3