F - Mech Eng,Light,Heat,Weapons – 24 – D
Patent
F - Mech Eng,Light,Heat,Weapons
24
D
122/36
F24D 17/00 (2006.01)
Patent
CA 1165194
ABSTRACT OF THE DISCLOSURE A water heating column furnace for producing non-corro- sive, drinking-water-quality heated water comprising a body or shell having at least an upper, heat exchange and stripping compartment and integrally formed and in-line therewith a lower compartment. A grating separates the integrated two compart- ments and a plurality of heat absorbing and transfer bodies, such as for example, Paul rings, are positioned within the upper compartment on top of the grating. A greater amount and depth of heat absorbing bodies are provided than would be needed merely for heating in order to also strip the water of substantially all its free oxygen to eliminate the corrosive effects of CO2 presence. Cold water is introduced into the furnace by a spray positioned over the heat absorbing bodies with the water running into the lower compartment as it is heated and oxygen-stripped by heating means. The heating means operates at a relatively low temperature free of intense hot spots to avoid NOx formations and its corrosive effects, with the heating means positioned within the lower compartment being in a first direct contact type (Figures 1 - 6) an open, exposed flame with direct flame/water contact and in a second, heat reclaiming type (Figures 7 - 8) hot exhaust gases from a separate source. In the first type the furnace has water flow directing means positioned within the furnace shell to direct the downward flow of water to a predetermined area in the lower compartment in order to prevent hot spots from forming on the shell of the furnace in the area of the lower compartment. An exhaust stack is provided above the upper compartment for removing the exhaust gas from the furnace with the exhaust stack being formed, in a generally U-shape configuration. The U-shape configuration acts to prevent back flow of air into the furnace whenever the furnace blowers are shut-off.
380887
Borden Ladner Gervais Llp
Wood Harry E.
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