SU68983A1 - Pr room furnace - Google Patents

Description

According to the invention, a direct flow room furnace with small dimensions is proposed, but with the furnace volume as large as possible to develop the inner surface and heat capacity, bringing the small heat capacity furnace to the high heat capacity furnaces.

A distinctive feature of the proposed furnace is that the accumulating nozzle in its upper part is made in a series of parallel vertical partitions forming straight linear vertical channels of constant cross-section, which are connected to the firebox by vertical channels of a smaller cross-section located in the roof of the firebox.

Channels of smaller cross section are used to afterburn gases from the firebox, as well as to evenly distribute them over the accumulating nozzle.

FIG. 1 shows a furnace in vertical section along V-V of FIG. 2; in fig. 2 is a cross section of the furnace in / - / fig. one; in fig. 3 is a cross-section along II-P of FIG. one; in fig. 4 - vertical section along

II

VI-VI of FIG. 3; in fig. 5 is a cross section along /// - /// FIG. 1 and in FIG. b - cross section of FIG. one.

Usually, in the furnaces of room furnaces, jets of combustible gases and air move parallel in their upward motion, mixing slightly. As a consequence, the combustion is prolonged, the flame is lengthened, due to which a large volume of the furnace is required to increase the residence time of the gases in the furnace during which the gases could mix and burn.

In the proposed furnace, the volume of the flue space is reduced due to the fact that the combustion process of flue gases occurs not only in the furnace, but also in channels 2.

When gases pass through constricted channels 2, the speed of passage of the latter increases due to chimney draft and their movement becomes turbulent, which improves mixing with air and accelerates the combustion process. Thus, by reducing the volume of the furnace space,

it is possible to develop the stove storage accumulation more strongly.

The channels 2 distribute the gases through the channels 4 located above between the parallel accumulating partitions 3. The sections of the channels 2 are taken so small that the gases pass through them with maximum speeds developed by this chimney stack. In comparison with the remaining resistances, the resistance of the channels 2 to the passage of gases is very large, which ensures, with equal sections, the quantities of gases passing through them. When the gases rise by several vertical channels, when one of them overheats, the gases rise mainly along the superheated channel. But as the gases pass with a speed approaching the maximum created by a draft stack, the increase in speed in one of them causes a sharp increase in resistance and is necessary to overcome its dilution, which can not be created by low channels. Therefore, the rates in channels 2 will be substantially the same. The flue hectare of the flue pipe is distributed equally on them and causes the same speed, and the difference in thrust generated by the difference in the heating of the channels is negligible compared to the main flue of the flue pipe. Generally, the gases are distributed through the channels under the action of the stack chimney, which is the same for all the channels. Thus, the role of channels 2 is reduced to accelerating the combustion reaction and uniform distribution of heat in the channels 4.

In cases where the fuel burns in a bed, for example, when it is fired by anthracite or coke or lean coal, the furnace volume may be limited.

only the volume required for fuel loading. In this case, the role of channels 2 is reduced only to the distribution of gases among the accumulating masonry located above the furnace.

The arch of the firebox with the channels 2 located in it can be lowered to the furnace door during anthracite heating and the freeing volume is used to increase the accumulating stack.

By distributing the cross-sectional areas of the channels in proportion to the heating surface, it is possible to obtain a uniform distribution of heat between the inner and outer surfaces of the furnace, with the most heated surfaces being at the bottom of the furnace, heating the furnace will decrease towards the top, which is desirable in the heating furnace. Warming up around the perimeter of the furnace will be the same.

On top of the channels 2, openings 7 are arranged through which the channels are cleaned. The flue gases from the channels 4 pass through the collector 5 to the chimney 6.

If you cut the furnace in horizontal planes into a number of large blocks, you will get an oven that is easy to manufacture and assemble.

Subject invention

A continuous room furnace with an accumulating nozzle in its upper part, characterized in that the accumulating nozzle is made in a series of parallel vertical partitions 3 forming straight linear vertical channels 4 of constant cross section connected to the firebox by vertical channels 2 of a smaller section located in the vault the firebox.

FIG. I

FIG. 2 FIG. four

FIG. 3

FIG. five

FIG. b