FIELD: heating.
SUBSTANCE: invention is designed for water heating and may be used in heat power engineering. Boiler consists of the main section with heating element represented with gas-burner with automatic controller for supplying gas and several additional sections arranged upward and vertically. Each section includes housing, heat exchanger in the form of tubular coil and nozzles. Flow area of coil tubes and distance between tube lines in the upper part of coil is less than those located in the lower part. Inlet nozzles for each section are connected to return water supply pipelines. Outlet nozzles from each section are connected to heat-supplying pipeline. Additional tap is provided between automatic controller and gas burner.
EFFECT: reduction of overall sizes, increase of productivity, efficiency factor, simplicity and safety of boiler operation and control.
1 dwg
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