DE1055163B - Method and furnace for gasifying or smoldering fuels in cross-flow - Google Patents

Description

GERMAN

The invention relates to a method for gasifying or smoldering fuels in Cross-flow furnaces. In these ovens, a gaseous gasification or flushing agent flows through the shaft sinking load transversely to its direction of movement. Can be used as a gasification agent or flushing agent Air, oxygen, water vapor, flue gas or mixtures of the substances mentioned are used. One can go to this Purpose also use the gas generated in the furnace itself, which is circulated.

As a result of the horizontally progressing gasification or smoldering and the vertical movement of the The input material creates diagonal surfaces with the same gasification or smoldering state. This means, that the thickness of the goods has not yet gassed or smoldered on the inner wall which the detergent escapes, decreases in a wedge shape from top to bottom. Lays in the lower part of the shaft the gasification or rinsing agent thus returns shorter distances in unused goods than above. This path can be so small, especially in the lowest part of the shaft, that there is no significant reaction more occurs between the gas and the feedstock containing carbon and bitumen.

It is already known that the gasification agent in the cross-flow gasification of fuels is in the upper part of the furnace in one direction and in the lower part of the furnace in the opposite direction to manage the estate.

Attempts have already been made by separating off a post-gasification zone or by crossing the Ouerstromes to counter these disadvantages. However, the desired effect can essentially be achieved cannot be achieved because the buoyancy to which the gas is subject on entry is the intended course of the gasification or flushing agent in the oven counteracts this.

According to the invention, the height in the cross-flow furnace is uneven Reaction variances created a remedy that on the side of the gas outlet below gasification or flushing agent is additionally blown into the zone through which the cross-flowing gas passes. As a result of its buoyancy, this rises along the exit wall and runs through it on this side Lying goods, in which essentially only minor reactions have taken place, in countercurrent. on in this way, this property is treated in the desired manner.

Should the gas generated in the reaction zone by the cross-flowing medium be its original Keep composition, so you can according to the further invention, the gases resulting from the Gasification process and furnace for gasification ascending along the entrance wall or smoldering of. Fuels

in cross flow

Applicant:

Dr. C. Otto & Comp. G.m.b.H., Bochum

Rudolf Mewes and Dipl.-Ing. Max Goebel, Buchmn, have been named as inventors

or form flushing agent, draw it off separately below the gasification zone of the furnace. This gas becomes appropriate used to heat the recuperator, in which the gasification or flushing agent is heated.

The way in which the method is to be carried out is explained in more detail with reference to the drawings. These represent three ovens in vertical section, which are provided with the facilities that serve to carry out the procedure.

The goods abandoned at 1 enter shaft 2, where it sinks. In the gas-heated recuperator 3, the gasification or flushing agent is heated and flows through channels behind the sectional plane shown, to the distribution chamber 4. From there it passes through the inlet wall 5, designed as a nozzle grate, into the shaft 2 and flows through it the goods in it. On the side opposite the chamber 4 is the outlet wall 6 which is provided with the outlet openings and through which the gas generated enters the collecting space 7. From here it arrives at template 8 and from there to the cooling and conveying devices. The inclined surface that forms, which separates the gasified or smoldered material from the essentially still fresh fuel, is indicated by 9. The residue! the gasification or smoldering is withdrawn intermittently or continuously into the bunker 12 by means of the device 11. The gaseous medium introduced to compensate for the reaction conditions is blown in through the downwardly directed slots 10 in the furnace shown in FIG. It rises up on this side and brings the goods that have not yet been treated, which are mainly located on this side,

■ to the reaction.

809 790 / 264-

Claims (5)

In the furnace according to Fig. 2, the injection device 14 for the additional gas to be introduced is located directly above the discharge device 11. It is possible here to draw off the gaseous products formed in the lower zone together with the purging gas through the openings 13 and via the line 15 to the To supply recuperator 3 for heating so that they do not mix with the gases formed in the upper part of the furnace. In the furnace according to Fig. 3, in addition to the devices described so far, in the lower part of the furnace in the inlet wall 5 passage openings 16 are provided, which cause part of the gasifying and flushing agent entering the cross-flow zone through the openings in the wall 5 along the \ Vand flows downwards, reacts with the remaining carbon of the input material and then passes over into the ascending part of the heating flue 3. This short circuit in the gas supply saves a considerable amount of fuel gas for the heating flues, so that, if necessary, a mixture of lean gas and heated air can be used. Patent claims: 1. A method for gasifying or smoldering fuels in cross-flow, wherein a gasification or. Detergent the sinking in a cross-flow oven Charged material flows through essentially transversely to its direction of movement, thereby characterized that below the cross-flow zone on the side of the gas outlet additional gasification or flushing agents are introduced, which ascend along the gas outlet wall of the furnace react with the good that has not yet been treated. 2. The method according to claim 1, characterized in that the generated in the rising current Gas is discharged below the cross-flow zone. 3. Cross-flow furnace for performing the method according to claim 1 or 2, characterized through openings serving to introduce the ascending gasification agent or flushing agent (10, 14) in the outlet wall (6) of the furnace below the outlet openings of the cross-flow zone. 4. cross-flow furnace according to claim 3, characterized by for withdrawing the reaction of the rising gasification or flushing agent formed with the fuel serving gases Openings (13) in the outlet wall (6) of the furnace between the inlet openings (14) for the ascending Gasification or flushing agent and; the outlet openings of the cross-flow zone (Fig. 2). 5. Cross-flow furnace according to claim 3, characterized by openings in the outlet wall (6) for drawing off the gases formed by the reaction of the rising gasifying agent or flushing agent and through openings (16) in the inlet wall (5) below the inlet opening of the overflow zone for the simultaneous withdrawal of the through part of the through the outlet openings of the overflow zone entering gasification or flushing agent in the descending stream of gas formed (Fig. 3). Considered publications:
German patent application P 5908 IVc / 24e (published on March 25, 1954). 1 sheet of drawings © 80S 790/264 4.59