Stoker-fired boiler, a method of modernization of stoker-fired boilers and a method of elimination of uncontrolled leakages of air not taking part in the combustion process in a stoker-fired boiler

Abstract

A boiler according to the invention contains an additional air channel (9) with an inbuilt fan (10) with adjustable output. The first end (91) of the additional air channel (9) is connected with the under-stoker space (11) located outside of the wind boxes (5) of the under-stoker wind boxes system (4). The other end (9') of the additional air channel (9) is connected with either the space of the channel (6) supplying outside air to the wind boxes (5) or with the atmosphere or with the secondary air channel of the combustion chamber (2). Modernization of the existing boilers consists in installation in the described above method of an additional air channel (9) with an inbuilt fan (10). The method of elimination of uncontrolled leakages in a stoker-fired boiler consist in leading out and air, getting through air gaps, from the under-stoker space of the boiler located outside of the wind boxes (5) to the described above additional air channel (6), wherein current output of the fan (10) built into this channel is proportional to the current difference between temperature of air supplied to the wind boxes (5) and temperature of air in the additional air channel (6).

Description

technical field [0001] The subject of the invention is a stoker stoker boiler comprising a movable stoker and a stoker downwind box system in the combustion zone, a method of modernizing such a boiler, and the elimination of non-participating combustion processes in the boiler A method of uncontrolled leakage of air. Background technique [0002] In the commercial power industry and the heating industry stoker stoker boilers are generally used for heat production, where the combustion of solid fuels, especially coal, takes place on moving mechanical stokers. Above the stoker there is the combustion chamber with secondary air passages, while below the stoker there is the under-stoker space containing the stoker down-blower system with bellows, and the supply of air from the atmosphere to the interior of the bellows Channels, which are necessary for the combustion process to take place on the stoker. During boiler use, in the bellows space, the air pressure usually reaches c...

AI Technical Summary

Problems solved by technology

The pressure difference that emerges between the bellows space, the stoker space, and the atmosphere results in an uncontrolled leakage of the gas flow through the gap that exists between these spaces, however the probe manufacture of the boiler does not guarantee that it is completely sealed

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