Pre=mix combustion process

摘要

The pre-mix combustion process involves using fuel (7,8) and a working gas (3,4,9) in preparation for combustion. There are at least two stages (1,2). In the first stage (1), fuel (7) and combustion air (3) with excess of air are mixed in a mixer (21). The mixture (23) thus formed is stabilised by a flame stabiliser (11) and burned. In the second stage, fuel (8), combustion air (4) and/or smoke gas (9) are mixed in a mixer (22). The resultant mixture (24) is mixed with exhaust gas (25) from the first stage. This mixture (12) is then burned. In the second stage, combustion air may be used and with the excess air being, at least, as large as that of the first stage.