SU70755A1 - The method of obtaining high-calorific gas from solid fuel - Google Patents

Description

Methods for producing high-calorific gas in vertical furnaces by coking solid fuel with the supply of heat through the heat transfer wall and the subsequent combustion of the formed coke are known.

In order to use the heat released during the combustion of coke, to heat the fuel during its coking, it is proposed to coke the solid fuel and then burn the coke formed in adjacent chambers so that when coke is burned in one chamber, the newly loaded fuel is coked.

FIG. I and 2 show a vertical furnace for high calorific gas generation.

The transfercar bunker 7, moving along the suspension beams 2, is set accordingly to / or the position above the openings of the loaded chambers.

The chambers consist of prefabricated sections, separated by walls. For rigidity, the walls are reinforced with longitudinal ribs with slots for the free passage of gases. The material for the sections is heat-resistant chromium cast iron, heat-resistant steel or ceramics, which allow heating of the wall to 1000 °. The top of the chamber is covered with lids fitted with a water shutter.

Smoke pipelines 3 adjoining the upper part of each chamber unite groups of alternating sections. In the middle part of the chambers (at the end of the coking zone) there are similarly connected pipelines 4, which serve for gas extraction. At the bottom of each chamber there is a water-cooled ash removal screw and pipelines supplying air for the burning of coke, connected in a main line. Outside, the furnace is encased in a brickwork to reduce heat loss.

In order to use the heat generated during the combustion of coke, to heat the fuel during its coking, both processes are carried out in such a way that half of the sections distill the shale, and in the other half the combustion process of the coke formed from the previous distillation cycle. After burning the coke, the water is removed and a new portion of shale is loaded into the vacant space, after

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in the combustion chambers, combustion begins.

Shale decomposition occurs in two steps: 1) coking and 2) release of cracking products in a layer of red-hot coke.

Coke combustion starts from below to create high temperatures in the cracking zone in the adjacent chamber; This is facilitated by the presence of a layer of hot ash at the bottom of the coke and slate sections. The air supplied for burning the coke is heated when it passes through a layer of hot ash and cools it before being removed.

After loading the slate into the next row of chambers (in the drawing is odd), the transfercara 7 moves under the loading of the bunkers; the lids are closed and combustion air is supplied to adjacent (even) chambers with red-hot coke.

The duration of the gasification process is determined by the combustion time of the coke, but its optimal duration must be established experimentally.

At the end of the coke burning, the ash is removed from the chambers, after which the lids 5 are opened, the fuel is again supplied, and after loading the cycle is repeated.

The covers 5 are designed in such a way that workers are allowed to enter the cleaning and inspection chamber, and in the case of cotton, the covers are automatically opened, releasing gases into the atmosphere.

Subject invention

The method of obtaining high-calorific gas in vertical furnaces by coking solid fuel with heat supply through the heat transfer wall and subsequent combustion of the formed coke, characterized in that in order to use the heat generated during the combustion of coke to heat the fuel during coking, both processes are carried out adjacent chambers of a multi-chamber furnace in such a way that, while burning coke in one chamber, co-fuel the newly loaded fuel in coke chambers.

FIG. 2 Pa3ps: i ns AS