Liquid heaters and vaporizers – Stand boiler – Heated by liquid or steam
Patent
1982-11-02
1983-12-06
Yuen, Henry C.
Liquid heaters and vaporizers
Stand boiler
Heated by liquid or steam
122 44A, 122136R, 122206, 122353, 122372, 122498, F22B 500
Patent
active
044186495
ABSTRACT:
A boiler comprising a long tank lying on its side and having a fire box at one end which is adjacent to a recessed bulkhead that is spaced from a partition in the end of the tank. The top of the tank and two sides thereof extend beyond the bulkhead around the fire box to provide water filled side and top portions for the fire box. The other end of the tank has a rear bulkhead which lies adjacent to a hot gas manifold that extends beyond the rear bulkheads to form a hot gas chamber below a smoke stack. The tank has a number of large diameter tubes extending horizontally between and through the two tank bulkheads to conduct hot gases from the fire box to the manifold chamber and smoke stack. Inside the fire box there is a water filled fuel supporting grate connected by a pump to circulate water from the tank, and between the grate and the front bulkhead there is an upright baffle which extends across the fire box and rises toward the overhanging roof portion but leaves a space above the baffle through which hot gases can pass from the fire box into the flue tubes. The fire box is enclosed by a front partition having ash clean-out doors, controllable air vents adjacent to the grate, and two large water filled doors connected to the tank for circulation. A water jacket surrounds the upper part of the manifold chamber. Helical blades are inserted in the flue tubes to cause the hot gases passing therethrough to whirl, and the flue tubes are all provided with butterfly valves which control the rate of flow of the hot gases from the tubes to the smoke stack.
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