SMOKE HEAT RECOVERY APPARATUS FOR OIL OR GAS-FIRED BOILER

摘要

A smoke heat recovery apparatus for an oil or gas-fired boiler, comprising an outer barrel (1) and a smoke channel (3) and a water circulation channel (2) disposed within said outer barrel (1). A water inlet (5) and a water outlet (6) are disposed on the water circulation channel (2); the smoke channel (3) and the water circulation channel (2) are both composed of a plurality of tubular channels (b, a), the tubular channels (b, a) in the smoke channel (3) and the water circulation channel (2) being coaxially disposed and radially arranged at intervals; the top and bottom ends of the smoke channel (3) are open; the two ends of the tubular channels (a) in the water circulation channel (2) are closed and the tubular channels (a) are connected at top and bottom to form a channel bending back on itself upwards and downwards successively; the water inlet (5) and the water outlet (6) are respectively arranged at the two ends of the bent channel. The present heat recovery apparatus has a large heat transfer area and is structurally simple.