| 摘要 |
PURPOSE:To decrease an amount of air for combustion leaking in exhaust gas, by providing a casing the interior of which is partitioned into four vent passages of a pass region on the high temperature gas side, an intermediate region on the gas side, a pass region on the low temperature air side, and an intermediate region on the air side, and a rotor which is rotated in the order of the four vent passages. CONSTITUTION:A casing 1 is provided with two intermediate regions between a pass region (a) on the gas side and a pass region (b) on the air side, and is connected to low pressure air through a duct by means of an intermediate region (c) on the gas side and an intermediate region (d) on the air side of the outlet of a ventilator. With a rotor 2 rotated, gas conveyed from the pass region (a) on the gas side to the region (c) on the gas side is pushed out by means of high pressure air, and the rotor is rotated to the pass region (b) on the air side in a state to fill the element of the rotor 2 with air. Meanwhile, air conveyed from the pass region (b) on the air side to the intermediate region (d) on the air side along with rotation of the rotor 2 is pushed out to the outlet side of an air preheater, and instead the element of the rotor 2 is filled with gas, and the rotor is rotated to the outlet side of the pass region (a) on the gas side. Along with rotation of the rotor 2, the above process is continued in succession, and an amount of input conveyance leak can be decreased. |
