Firetube boiler

An apparatus for transferring heat from a heated gas to a heat transfer medium, comprising:

• a tank for holding the heat transfer medium;
• a substantially horizontal combustion conduit extending through said tank in heat transfer relationship with the heat transfer medium;
• a heat source in communication with said combustion conduit for heating and driving the heated gas into said combustion conduit;
• a set of fire conduits extending through said tank below said combustion conduit and in heat transfer relationship with said heat transfer medium and in communication with said combustion conduit;
• and
• a tank divider member positioned within said tank between said combustion conduit and said set of fire conduits for dividing said tank into an upper region and a lower region, said divider member having two apertures;
• whereby as the heat transfer medium cools, the heat transfer medium passes from said upper region, through at least one of said apertures, and to said lower region;
• and
• whereby when the heat transfer medium is contained in said tank, and when the heated gas is driven into said combustion conduit, the heated gas flows through said combustion conduit, and then flows downwardly and then substantially transversely through said fire conduits, so as to transfer heat from the heated gas to the heat transfer medium as the heated gas flows through said combustion conduit and said fire conduits.

An apparatus for transferring heat from a heated gas to a heat transfer medium, comprising:

• a tank for holding the heat transfer medium;
• a substantially horizontal combustion conduit extending through said tank in heat transfer relationship with the heat transfer medium;
• a heat source in communication with said combustion conduit for heating and driving the heated gas into said combustion conduit;
• a first set of fire conduits extending through said tank below said combustion conduit and in heat transfer relationship with said heat transfer medium and in communication with said combustion conduit;
• a second set of fire conduits extending through said tank below said first set of fire conduits and in heat transfer relationship with said heat transfer medium and in communication with said first set of fire conduits;
• whereby when the heat transfer medium is contained in said tank, and when the heated gas is driven into said combustion conduit, the heated gas flows through said combustion conduit, then flows downwardly and then substantially transversely through said first set of fire conduits, and then flows downwardly and then substantially transversely through said second set of conduits, so as to transfer heat from the heated gas to the heat transfer medium as the heated gas flows through said combustion conduit, said first set of fire conduits and said second set of fire conduits;
• a first tank divider member positioned within said tank between said combustion conduit and said first set of fire conduits;
• and
• a second tank divider member positioned within said tank between said first set of fire conduits and said second set of fire conduits, said first tank divider and said second tank divider dividing said tank into an upper region, a central region located between said first and second tank dividers, and a lower region, wherein each said tank divider member has an aperture;
• whereby the heat transfer medium passes to and from said central region through said aperture as the heat transfer medium cools.

An apparatus for transferring heat from a heated gas to a heat transfer medium, comprising:

• a tank for holding the heat transfer medium;
• a combustion conduit extending through said tank in heat transfer relationship with the heat transfer medium;
• a heat source in communication with said combustion conduit for heating and driving the heated gas into said combustion conduit;
• and
• a first set of downwardly angled fire conduits extending through said tank below said combustion conduit and in heat transfer relationship with said heat transfer medium and in communication with said combustion conduit, wherein said first set of downwardly angled fire conduits are angled between 1 and 45 degrees relative to said combustion conduit;
• and
• a tank divider member positioned within said tank between said combustion conduit and said first set of fire conduits for dividing said tank into an upper region and a lower region, said divider member having an aperture;
• whereby when the heat transfer medium is contained in said tank, and when the heated gas is driven into said combustion conduit, the heated gas flows through said combustion conduit, and then flows downwardly through said first set of downwardly angled fire conduits, so as to transfer heat from the heated gas to the heat transfer medium as the heated gas flows through said combustion conduit and said first set of downwardly angled fire conduits.