EXTERNAL BOILER Russian patent published in 2015 - IPC F24H1/00 

FIELD: power industry.

SUBSTANCE: external boiler consists of the housing inside which the heat exchanger with two direct lines and return lines is installed, and in the direct line of the heat exchanger the automatic valve with permanently open nozzle is installed, and in the heat and hydraulic proof housing the deaerating expansion tank containing the adjustable safety valve, the ball valve, the manometer and the circulation pump connected to the deaerating expansion tank are installed. The circulation pump is connected through the three-way valve by the supply line to the direct line of the heat exchanger after the automatic valve, and the three-way valve - to the heat exchanger, and the first direct line connects the top part of the heat exchanger to the deaerating expansion tank 10, and the second direct line - with the heating system, and the automatic valve with the permanently open nozzle is installed in the second direct line to the circulation pump.

EFFECT: possibility for occurrence of circulating pressure of natural circulation of the heat carrier due to use of the whole height of the heat exchanger.

1 dwg