SU60316A1 - Steam water-tube sectional boiler of low power - Google Patents

Description

The invention relates to a group of low-power steam circulation water-tube single-way boilers with natural circulation, having a cross-arrangement of direct heating pipes and an internal firebox, shielded from all sides with straight pipes of boiler sections.

In the proposed boiler, in order to eliminate the laborious processes of making the bottoms and the need to have expensive and complicated equipment for this, the drum for collecting steam is made without the bottoms of four equal cuts of pipes that form a square in the plan and are welded in the corners between themselves.

Tubes of sections of the corresponding side of the boiler are attached to each side of the drum.

This boiler can be made without a grate with the location in the lower part of the boiler on all four sides of vertical shafts for direct combustion of fuel in them. This eliminates the dependence of the power of the furnace (and hence of the boiler) on the cross-sectional dimensions of the boiler, which determine the area of the grate of the internal furnace.

FIG. 1 shows a vertical longitudinal section of a low-capacity steam water-tube sectional boiler; in fig. 2 is a vertical cross section of it; in fig. 3- horizontal section of the boiler; in fig. 4 view from above; in fig. 5 - vertical section of the boiler with mines on the sides of it; in fig. b - horizontal section along ab in FIG. five.

The boiler consists of a drum /, boiler sections 2, collectors 3 and standpipes 4 (Fig. 1-4). The drum is equipped with manholes 5, fittings 6 for fittings and fittings 7 for the upper ends of the upper lifting tubes of the boiler sections 2 and the lowering tubes 4. The boiler sections consist of heating pipes 8, upper lifting tubes 9 with JO flanges at the upper ends, and lower lifting tubes 11 with flanges 12 at the lower ends. Lower risers // have ribs / 5 welded to the side along the tubes, and fittings 14 with hatches 15, located on the upper ends of the tubes opposite the welding points of the heating tubes 8. The collectors 3 have fittings 16 for the flanges of the lower lifting tubes and fittings for standpipes 4. Significant height of circulating

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contour provides the intensity and reliability of circulation. The feed water through the feed valve at nozzle 6 enters the drum /, goes down through the downpipes 4 into the collectors 3 and, the passage through the pipes 8 of the sections 2 heats up and returns to the drum again in the form of a steam-water emulsion.

The rear collector belt 3 is located below the remaining collectors (Fig. 1). The special pipes (not shown in the drawing) are connected to other collectors, which makes it possible to blow all screens, pipes and boiler manifold through a special valve installed on the bottom of the branch pipe. A grate / 5 grate is installed in the lower part of the furnace space of square section. The fuel is thrown on the grate through the loading door 19. Air is supplied under the grate "the ditch is ejected through the door 20. The smoke pipe 21 is installed directly above the hole in the middle of the drum. The outer surface of the drum and the lifting tubes are covered with a layer of warm insulation 22.

The drum, collectors and boiler sections of the boiler are welded from pipes. Due to the lack of val. pipe fittings and the presence of flange joints make it possible to quickly and easily assemble a boiler from individual parts and disassemble it without using and constructing any devices and devices necessary for mounting other heavier and cumbersome non-separable boilers.

In the embodiment of the boiler shown in FIG. 5 and 6, there is no grate, and the boiler on all four sides in its lower part is equipped with four independent shafts 23 with partitioned air ducts

24. The fuel fed into the bunker

25, under the action of its own weight, enters the shaft 23, where the air necessary for burning the fuel also enters through the nozzles 26 from the air duct 24.

Gaseous products of fuel combustion, which are formed in the shaft 23, through the slots 27 (Fig. 6) enter the chamber 28, from it into the boiler flue 29, moving upwards in a direction transverse to the heating pipes, from where they fall into the water economizer and air heater

Ash and slags are removed through gate 30 as the fuel burns out in one or another shaft 23, before filling it with a new portion of fuel.

Subject invention

Claims (2)

1. Low-power steam water-tube sectional boiler, designed as a single-pass with natural circulation, with a cross. An arrangement of boiling tubes, characterized in that the boiler drum is made without bottoms of four tube cuts, welded at angles between themselves and forming a square in plan, to each side of which pipes of the corresponding side of the boiler are attached. 2. The steam water-tube sectional boiler according to claim 1, of which is the use of fuel mines located on all four sides of the boiler. 24