| 摘要 |
A flare stack is provided for combusting waste gas. The flare stack includes a main stack tube connected at a bottom end to a source of the wast e gas. The main stack tube includes a discharge at a top end of the stack tube for directing the flow of waste gas through the main stack tube to the discharge. A blower is provided for directing a flow of combustion air into the flow waste gas adjacent the discharge of the stack tube. A blower contrl senses the pressure of the wast e gas adjacent the source for driving the blower at a speed which increases with a n increase in the pressure of the waste gas. In this arrangement the supply of combustion air remains generally proportional to the flow of waste gas for ensuring complete combustion of the waste gas. A hood is mounted on the discharge of the main stack tube.
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