Horizontal mobile grate gasifier

Abstract

The invention relates to a horizontal mobile grate gasifier, which comprises a furnace body with a grate and an air supply device. The air supply device consists of a primary air supply pipe and an upper-layer air supply pipe, the primary air supply pipe is connected with a plurality of air chambers and is arranged below the grate, the upper-layer air supply pipe is arranged on the two sidewalls of the furnace body and is communicated with the inner chamber of the furnace body, the rear part of the furnace body is provided with a flue gas channel, the rear end of the flue gas channel is connected with the combustor of a boiler, a flue gas circulating pipe which is connected with the rear part of the combustor communicates circulating flue gas and the upper-layer air supply pipe to form a mixed gas channel, the mixed gas channel and a steam pipe respectively extend into the air chamber and the cavity of the furnace body through a primary air Venturi pipe and a secondary air Venturi pipe; and mixed gas can flow to the front side of the combustor of the boiler through a gas mixing fan. The invention has the advantages of reducing Ringelman black and smoke emission, allowing the use of coal raw materials which are each to be coked, expanding the flexibility of the boiler use and the diversity of operating modes, and realizing the online real-time control and adjustment of parameters of steam output variables, grate operation and gasification dosage, thereby achieving the best operating conditions.

Description

technical field [0001] The invention relates to the field of a coal-fired gasification furnace; specifically, it refers to a horizontally movable furnace exhaust gasification furnace that introduces circulating flue gas and controls gasification in different areas to expand the range of applicable coal types and reduce the blackness of flue gas and smoke and dust emissions. . Background technique [0002] At present, there are various industrial and civil gasifiers on the domestic and foreign markets, such as Chinese Patent Application No. 200820127031.3 "A Tilting Type Coal-fired Gasifier", which includes a furnace body, a furnace bottom, an air supply device, and a furnace body It is composed of a shell and a refractory material layer; the upper part of the furnace body is provided with a coal feeding device, and the bottom of the furnace body is provided with an inclined fire grate, that is, the furnace body is installed on the furnace bottom inclined forward. [0003] A...

AI Technical Summary

Problems solved by technology

[0005] However, the disadvantage of the above-mentioned Chinese patent application number 200820127031.3 "A Inclined Coal-fired Gasifier" is that no circulating flue gas is introduced into the primary air supply pipe and the secondary air supply pipe, thereby affecting the applicable The range of coal types and the improvement of the blackness and dust content of the exhausted smoke

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