SU116890A1 - Furnace for firing fine-grained materials in a fluidized bed - Google Patents

Description

FURNACE FOR FIRING FINE-GRAIN MATERIALS IN

Said April 28, 1958 No. 598031 n Committee on Inventions and Discoveries

under the Council Mimistron USSR

The baking bed furnaces for fine-grained materials in the fluidized bed are equipped with dumpless bottom plates equipped with metal nozzles through which air or some other gas is continuously blown into the fluidized bed of the calcineable material. Metal nozzles do not withstand sufficiently long work at high temperatures and require replacement over relatively short periods of time after a certain time.

The described furnace for firing fine-grained materials in a fluidized bed with a hearth that is lined with refractory bricks in the exchanger recuperator nozzle can work without repair for a longer time. This is achieved by the fact that the furnace hearth is laid out of refractory bricks without the use of metal nozzles or other metal parts, and channels are left for the passage of air in the hearth, the design of which ensures operation without collapsing the calcined bulk material through them.

The bottom is laid out of the schamotny bricks in the form of a heat exchanger nozzle in four rows and with gaps-channels between the bricks of each row. The three lower rows are laid out from a standard straight brick, and the upper fourth is laid out from fireclay blocks with air outlets. In order to reduce the cost, if the temperature conditions of the work of the hearth allow, the two lower rows can be made not of chamotte, but of ordinary straight construction (red) bricks. The channel gaps in each layer are shifted relative to the channels in the other layers, which ensures the latticelessness. The direction of the channels in two adjacent layers is reciprocal perpendicular.

The fourth (upper) row of fireclay blocks blocks the channels of the underlying layer completely.

Boiling LAYER

No. 116890-2 -

Air (or another gas) from the channels of the third row enters the working space through the holes in the blocks.

The bottom of the described structure is simple to manufacture, sufficiently heat-resistant, does not contain metal parts, is convenient in operation and ensures firing in the boiling (fluidized) state of the bulk material without spilling it through the hole.

Subject invention

A furnace for firing fine-grained materials in a fluidized bed with a subtype, dusting and: ("rHcynopHoro bricks in the form of a re-plaster grinder, characterized in that in order to increase the durability of its blu, its : yum that between the rows of bricks they receive channels located perpendicularly in one layer relative to the other, and the fourth layer is laid out from refractory blocks with channels that serve to pass air or gas into the working space of the furnace.