SU5796A1 - Fire chamber with a gasification pre-furnace device - Google Patents

Description

The proposed furnace with a gas-supplying pre-furnace device is intended for burning mainly poor fuels, such as brown coal, multi-ash and high-moisture peat, and garbage containing organic matter, for which, in the rear part of the furnace, there are loading chambers equipped with in different combustion zones of volatile distillation fuels for combustion into the front of the thin, to which the burning coke is supplied by a chain grate, produced in the lower parts of the charging mines

In FIG. 1 depicts a vertical longitudinal section of the proposed furnace, FIG. 2 is a cross-section of the furnace; FIG. 3 is a plan view of the furnace, partially cut along the line ABCDEF of FIG. 1, fig. 4- three projections of the continuous insert of the loading shaft and FIG. 5-transverse and longitudinal sections of the chain grille.

In the rear part, fuel shafts of mine 3 are arranged for fuel, with a fuel storage capacity of 4-6 hours of continuous operation of the furnace. Catching vapors and gases inserts (on their own) 26, the shaft is divided into four zones: the first zone 1 serves to load the shaft with fresh portions of the smelt and for partial heating of the latter; the second zone 2 is for evaporation of fuel water that is not chemically bound to the fuel; the third zone 3 is used to release light volatile gases evolved at relatively low temperatures of the first coking period (at 250 -3511 °), and the fourth zone 4 is used to coke the fuel and, at the same time, to produce a combustible gas. Fuel from one zone to another flows automatically, under the action of its own weight. The vapors and gases formed on the way of the movement of the equipment through the zones are captured by pipelines 23, 24 and 25 and diverted to the gas tank G, g, passed preliminarily through a condenser and filters. From the gas tank, the combustible gas is fed to the tube 27 to the front of the toika and is introduced through a row of nozzles b into the furnace. Solid fuel in the form of coke, fell out of the last zone 4 of the mine, and goes to the mechanical stepped grate 5, through which it moves upwards.

and along the way it burns completely. A part of coke, burned in the immediate vicinity of the lower part of the mine (near zone 4), under the arch with a horizontal axis, heats outside the channels of the mine, forming zone 4, and thus accelerates the coking process.

The vapor and gas trapping pipelines 23, 24 and 25 have longitudinal and transverse slots 30 located under the lid 29, which has a slight inclination in the direction of the mine walls, thus preventing clogging of the trap piles and gas channels. At the ends of the transverse channels there are tides 37 with openings for mating with the pipes 23, 24 and 25.

Pipeline 23, as mated in its upper part with the loading area of the mine consisting of a single channel, does not require a saddle, while pipelines 24 and 25 mate with the channels of zone 2 and 3 by means of saddles 28.

The step grate 5, moving the burning coke from the bottom up with the speed necessary for complete combustion, throws the ashes and slags through the funnel 17 into the trolleys or onto the auger. The amount of intake air is controlled by a gate 16 sliding along the partition 15 separating the boiler room from the blower 13. The grate is mounted on a rigid system machine 14, which, together with the grate, can be rolled away from the boiler for repair and change of the grate in the slot covered during operation of the firebox plates. Combustion products, having passed passages 7, 8 and 9, having given up heat for their intended purpose, come into contact

with the outer walls of the channels of the mine, i.e. waste gases heat the second and third zones, along the slots 10 between the channels of the mine. From the slit 10, the warmer gases are retained for a short time in chamber 11 behind the shaft and then, after cooling, fall into the bore 12.

The subject of the patent.

A furnace with a gas-supplying pre-furnace device, mainly for burning low-grade fuel, characterized with its use in the back of the mines 3, which served to fill them with fuel, for the purpose of its gradual burning, heated with exhaust gases leaving the furnace and opening below the rear end lattice 5 (fig. 1.5) of a conventional device intended for burning the product obtained from the mines by gradually transferring it to the front of the furnace, which mines 3 are separated, in order to obtain in them, in the process of combustion, successive stages: heating the fuel, turning the water enclosed in steam, obtaining volatile products and coking, in a part or zone 1, 2, 3, 4 (Fig. 1, 2) with intermediate ones inserts 26 (Figs. 1, 5) equipped with a series of openings 30 for conducting gaseous products evolving in a given zone successively: through a common collecting piping 23, 24 or 25 for each zone and a conventional condenser and filters into a gas tank. D g, and from it, via pipeline 27 and nozzles 6, to the front of the combustion chamber.