SU1663326A1 - Recuperator - Google Patents

Abstract

The invention relates to heat exchange technology and can be used in fuel combustion plants. The goal is to increase the level of air heating (B). C out of the box 3 is distributed through the pipes (T) 1, passes through them, twisting in inserts (BT) 2, and enters the heated box 4. Heat is transferred to the heat B from the surrounding gases T 1 outside (G). By changing the spin pitch of BT 2 in each subsequent GT 1, the length of the contact path B with the heat exchange surface is increased. This provides heat B in all T 1 to one level, which generally increases the level of heat B. 2 Il.

Description

The invention relates to heat exchange engineering and can be used in fuel combustion installations.

The purpose of the invention is to increase the level of air heating when performing inserts tape.

FIG. 1 shows a heat exchanger, longitudinal section; in fig. 2 - the same cross section.

The recuperator contains a beam transversely washed with gases, parallel to the air-connected U-shaped tubes 1 of equal length, with twisted inserts 2 installed in them, made tape with a different twist pitch, increasing from pipe to pipe in the direction of gas movement. The twist pitch of the inserts 2 is determined by the dependence

Si

Si + 1

i + 1

0.2

Where, 2, 3, and so on, is the serial number of pipe 1 along the gas paths;

Si is the twist pitch of the insert 2 of the previous pipe 1;

Sj + 1 - the twist pitch of the insert 2 subsequent pipe 1.

The form of this dependence is determined experimentally.

The heat exchanger also contains cold air duct 3 and hot air duct 4.

The cold air box 3 is formed by a lid 5 with inlet and outlet pipes 6 and 7 connected to it, side walls 8, 9, 10 and 11, dividing wall 12 with openings 13, to which U-shaped distributing pipes 14 are attached, distribution box plate 15, in which there are inlet and outlet openings 16 and 17. Each U-shaped dispensing pipe 14 along the perimeter of its base is attached to the distribution plate 15, with the axis of one U-type. The tube 14 is perpendicular to the axis of one row of inlet ports 16.

A box of 4 mountains of which air is formed by a lid with a nozzle (L

WITH

oh oh

SA SA) Yu O

6 and 7, side walls 8, 10 and 11, a dividing wall 12, U-shaped distributing pipes 14 and a distribution plate 15.

The input end of each pipe 1 is attached to the holes 16 of the distribution plate 15, and the output end to the holes 17.

Multiple spiral helix knurling can be performed on the outer surface of each pipe 1 to form multiple spiral protrusions 18 on the inner surface, the twist angle of the inserts 2 is equal to the angle of the spiral 18 of the projections 18, and the spiral and twist approaches are oppositely oriented.

The work of the heat exchanger is as follows.

The air from the box 3 is distributed through the pipes 1, passes through them, twisting it with inserts 2, and goes into the box 4 heated. The heat is transferred from the washing pipe 1 outside the flue gases to heat the air. By changing the twist pitch of the inserts 2 in each subsequent gas 1 pipe, the length of the air contact path with the heat exchange surface is increased so that in all the pipes 1 the air heats up to a temperature equal to the heating temperature of the first pipes 1 along the gases.

Thus, the heat efficiency of the heat exchanger increases due to an increase in the air heating level.

Claims (1)

Invention Formula A heat exchanger containing a beam transversely flushed with gases of parallel tubes connected in the air of equal length with twisted inserts installed in them, made with different twist pitch, increasing from pipe to pipe along the movement of gases, different in order to increase the level of air heating when performing tape inserts, the twist pitch of the latter is determined by the dependence where, 2,3 and so on, is the pipe's sequence number along the gas flow; Si - the twist pitch of the insert, the previous pipe; Si + 1 is the twist pitch of the insert of the subsequent tube. J  //////// /////////// S ///////////// S //// /// - ///// 77X fzg.1 ten oh oh ) i) t}}} hb r bt)) i)})) tt)) n) y} L X) t V.W -VVVX LCh H o o o o o “.“. “.-.“. ““. VM .m. “- - -“. 1 BUT g / 4 cl О 6 О О / s g )) i)})) tt)) n) y} L X) t oh oh / / ft 16 ft BUT / . g //  gl  About About /  Y; YY Y Y YH-HH-Y .about. Schi 2