| 摘要 |
PURPOSE:To largely decrease noise caused by low-frequency and to prevent pulsation combustion by absorbing the fluctuation in pressure by feeding back a part of discharge gas, after exchanging heat, to the air absorbing side of a fan in a feed-air line, together with re-circulating a part of fuel gas by the intermediary of a rectifying cylinder. CONSTITUTION:A part of discharge gas, after exchanging heat, is fed back to the feed-air pipe 24 of a feed-air line 28 which is on the air absorbing side of a fan, from the discharged gas collecting chamber 30 of a combustion furnace 10 by the intermediary of an interconnecting pipe 29, together with re-circulating a part of combustion gas by the intermediary of a rectifying cylinder 20. When the pressure in a combustion chamber 10 which is in the positive pressure is raised, the raised part of the pressure is escaped into the feed-air pipe 24 which is in the negative pressure, so that the fluctuation in pressure in the combustion furnace 10 can be absorbed. As a result, noise caused by low-frequency is largely decreased, and pulsation combustion is prevented, in addition, it can make the combustion furnace 10 smaller, so that it makes possible to build a compact combustion apparatus. |
