Fail-safe, on-demand sulfurous acid generator

摘要

A generator to provide sulfurous acid on demand and fail-safe operation includes a hopper to provide a supply of sulfur, and a burner connected to the hopper to receive the sulfur and combust it to produce sulfur dioxide gas. An inlet passes air from the environment into the burner. A channel is connected to the sulfur burner to receive the sulfur dioxide. An eductor, connected to a water supply, draws the sulfur dioxide through the channel. The generator includes a safety system to substantially inhibit discharge to the environment products of combustion that are deemed objectionable, in the event of an interruption of the water supply or shut down of the sulfurous acid generator.