SU71593A1 - Cyclone furnace for burning fine fuel on the fly - Google Patents

Description

The proposed cyclone furnace for burning fine fuel on the fly is made in the form of a circular section, into which fuel is fed from above and air from below.

A feature of the proposed furnace is the creation of two vortex flows in it: upward in a spiral that carries fuel from the bottom up to the combustion chamber, and a downward flow entraining freshly loaded fuel down the cyclone furnace.

In the hearth in the middle of the hearth, a cone of refractory material is installed, by means of which the freshly loaded fuel is poured down from the middle of the hearth to the periphery to the mouths of air tangential channels located there.

FIG. 1 shows a schematic horizontal section of the proposed furnace; FIG. 2 is a sectional view of the furnace of FIG. one.

Vertical, made of refractory material, the round shaft 1 ends at the bottom with a cone 2, also made of refractory material. The main amount of air through the channels 4, 6 is supplied to the shaft of the low-pressure torol valve at a speed of 20 m / s. The inlets of these channels are directed tangentially to the cone 2, as a result of which, when air is fed into the shaft, two spiral streams arise in it, directed upwards.

In the mine, as in a cyclone, a zone of elevated pressure is created at the periphery and a lower zone is in the middle. The main gas-air stream flows from the shaft to the afterburning chamber 73 (the heat pipe, the normal combustion chamber under the water-tube boiler) through the expansion channel tangentially connected to the shaft. Part of the flow branches off and forms a reverse vortex, directed from top to bottom through the vacuum zone.

The shaft vault is cooled by a small, controlled amount of secondary air, which through outlet 9 is directed to the flare developing at the mouth of the channel 8.

Fuel feeding with fuel (using an adjustable feeder 70)

159

produced through the central hole 77 of the roof of the cyclone shaft. The fuel flow is sucked into the middle of the cyclone by a backward vortex and at the bottom of the shaft is picked up by the main upward vortices, ignited, gasified and burned, finally burning out in the afterburning chamber.

Subject invention

Claims (2)

1. A cyclone furnace for burning fine fuel on the fly, made in the form of a circular shaft with fuel supply from above, and air from below, characterized in that in order to create a spiral flow of combustible fuel covering the fuel supplied from top to bottom, in the hearth fireboxes placed tangential channels for air. 2. The form of the firebox according to claim 2, characterized in that a cone made of refractory material, located in the middle of the hearth, is used to supply the flowing freshly loaded fuel from the middle of the hearth to the mouths of the air tangential channels. FIG. 2  / I / x- kg /, f L / / - / V vl / /, / YI /