초록 ▼

High efficiency heat transfer from hot gases produced by combustion of fuel and oxygen in a burner to usably heat is provided in a simple and effective manner. A burner within a water-tight casing is mounted submerged within a pool of condensate within a boiler casing. Hot gases from the burner are

High efficiency heat transfer from hot gases produced by combustion of fuel and oxygen in a burner to usably heat is provided in a simple and effective manner. A burner within a water-tight casing is mounted submerged within a pool of condensate within a boiler casing. Hot gases from the burner are passed into direct heat exchange contact with condensate in the pool, and then flow in a turbulent manner into contact with a wet solid material heat exchange surface, such as pieces of limestone mounted on a perforated plate above the pool of liquid. The hot gases give up heat directly to the liquid wetting the heat transfer surface, and then are exhausted out the top of the boiler, passing through a secondary heat exchanger. Condensate is drained from the boiler to prevent excessive buildup. Liquid from the pool is circulated through a primary heat exchanger into heat exchange relationship with a heat exchange fluid, and then reintroduced into the boiler casing above the heat transfer surface (e.g. by spray nozzles), wetting the heat transfer surface.

대표청구항 ▼

[ What is claimed is:] [1.] A method of transforming the heat of combustion from a burner into useful heat comprising the steps of:(a) effecting combustion of fuel and oxygen in a burner to produce hot gases;(b) directing the hot gases into direct contact with a pool of liquid so as to effect heat e

[ What is claimed is:] [1.] A method of transforming the heat of combustion from a burner into useful heat comprising the steps of:(a) effecting combustion of fuel and oxygen in a burner to produce hot gases;(b) directing the hot gases into direct contact with a pool of liquid so as to effect heat exchange between the hot gases and the liquid in the pool;(c) causing the hot gases to flow in a turbulent manner into contact with a solid material heat transfer surface wet with liquid, so that heat from the turbulent flow of hot gases is transferred directly to the liquid wetting the solid material heat transfer surface, the solid material heat transfer surface being separate from a burner casing;(d) ultimately passing the gases, after steps (b) and (c), to exhaust; and(e) passing the liquid heated during the practice of steps (b) and (c) into heat exchange relationship with a heat exchange fluid which recovers usable heat from the liquid.