Coal burning hot air furnace with horizontal-reciprocating grate

Abstract

The invention relates to a horizontal reciprocating push grate (6) which comprises a heat-insulating long furnace chamber (1), at least one fuel inlet (2) and a waste residue outlet and is connected with the fuel inlet (2) to support fuel and form a combustion process. The upper space of the horizontal reciprocating push grate is provided with a heat exchanger (3) with a plurality of layers of annular metal barrel bodies forming clapboards. The heat exchanger is supported by the upper end face of the furnace chamber, the barrel-shaped clapboard at the innermost layer of the exchanger forms the lower part of a cavity, a group of upwardly raising furnace arches (16) are arranged between the cavity and a hearth cavity which is arranged in the furnace chamber and includes the upper part of the horizontal reciprocating push grate, the furnace arches (16) extend along the long direction of the furnace chamber, the furnace arches (16) are provided with holes to communicate the upper cavity with the lower hearth cavity, the metal barrel body clapboards of the heat exchanger form flue gas passages and hot air passages, which are separated from each other, high-temperature flue gas generated in the hearth heats the clapboards while being discharged outsides through the flue gas passages, and required hot air can be obtained by exchanging the heat by the heated clapboards and the cold air fed by a ventilator. The invention is widely applicable, can fully burn low-quality soft coal and has good effect in smoke and dust elimination.

Description

[0001] Field [0002] The present invention generally relates to a hot blast stove. Background technique [0003] There are many kinds of known hot blast stoves. In the silkworm cocoon industry in Sichuan, a kind of hot blast stove matching silkworm cocoon dryers has been used for many years. A kind of upright cylindrical heat exchange device is installed on the furnace base. The heat exchange device is often Placed above the furnace base, a fixed fire grate is set inside the furnace base, and a furnace is formed above the fire grate. The center of the heat exchange device coincides with the center of the furnace. The heat exchange device uses the high temperature generated by the combustion of the furnace for heating. The partition forms an interlayer to form a smoke exhaust channel and a hot air channel. However, such a hot blast stove has low thermal efficiency and high work intensity. It needs to be continuously turned by artificial open hearth to make the coal burn fully...

AI Technical Summary

Problems solved by technology

However, such a hot blast stove has low thermal efficiency and high work intensity. It needs to be continuously turned by artificial open hearth to make the coal burn fully. The surrounding masses complain that the furnace pollutes the environment, and the thermal efficiency is low and uneconomical. Therefore, it is inevitable to transform this known hot blast stove.

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