SU5201A1 - Tubeless water-tube steam boiler with external circulation pipes and a heating surface located only in the combustion space - Google Patents

Description

The most productive parts of the boiler are those parts of its heating surface that receive heat by radiation from the firebox, working in this way with a very high heat transfer coefficient. On the contrary, the other elements of the heating surface of the boiler give a much lower steam production. The present invention aims to increase the boiler steam. To do this, it is necessary to carry out the boiler in such a way that almost the entire surface or most of it works, receiving heat as possible by radiation from the firebox; The further use of gases must be maintained already with the help of cheaper and more reliable heating surfaces made up of steam superheaters, air and water economizers, etc.

FIG. 1, 2 and 3 of the schematic drawing shows the proposed tubeless water-tube steam boiler, in which the tubular heated surfaces are located in two protruding niches of the firebox; FIG. 4 and 5 of the schematic drawing shows the same boiler, in which the tubular heated surfaces are located in four protruding niches of the firebox.

The boiler consists of one or several pairs of drums with tubes rolled into them and having a vertical or steeply inclined position. All heated tubes of the boiler are placed in the first course of flue gases, however, for the preservation of the walls of the boiler intensive circulation

This is accomplished with a series of circulation pipes connecting the upper and lower drums behind the furnace wall. The shape of the tubes can be made differently, namely: straight and bent tubes can be used.

The tubular heated surfaces of the boiler are arranged according to fig. 1, 2 and 3, in two protruding recesses A of the firebox or, according to FIG. 4 and 5, in four protruding niches And fireboxes. Above and below the rear walls of the B niches are prefabricated boiler drums.

The subject of the patent.

A tubeless water-tube steam boiler with external circulation pipes and with a heating surface located only in the combustion space, characterized by the fact that the tubular heated surfaces of the boiler are located in two (Fig. 1-3) or in four (Fig. 4 and 5) protruding niches And the fireboxes, above and below the back walls of the B of what niches are located the collective drums of the boiler.

FIGs. § FIG. 3