Biofuel appliance venting system

Abstract

A venting system for a biomass burning appliance. The system includes at least one pipe element formed of a steel alloy comprising: a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 0.1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4×(C+N) and a maximum of 0.80 percent.

1 . A venting system for a biomass burning appliance, comprising:
 at least one pipe element formed of a steel alloy comprising: a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4 ×(C+N) and a maximum of 0.80 percent.   
   
   
       2 . The system of  claim 1  further including a biomass burning appliance burning a biomass fuel. 
   
   
       3 . The system of  claim 1  wherein the at least one pipe element comprises an exhaust system including at least a one cylindrical pipe sections pipe sections, a storm collar and a vertical termination, each of which is comprised of the steel alloy. 
   
   
       4 . The system of  claim 3  wherein the at least one pipe element further includes an appliance adapter  110  comprised of the steel alloy. 
   
   
       5 . The system of  claim 4  wherein the biomass fuel produces an exhaust containing at least the following NH 4 C 1 , K 2 SO 4 , KCl, KHCO 3 , HNO 3  and H 2 SO 4 . 
   
   
       6 . The system of  claim 4  wherein the biomass fuel produces an exhaust containing at least one of NH 4 Cl, and KCl, and at least one of HNO 3  and H 2 SO 4 . 
   
   
       7 . A biomass fuel burning heating system, comprising:
 a biomass fuel appliance producing an exhaust containing at least one of NH 4 Cl, and KCl, and at least one of HNO 3  and H 2 SO 4 ; and   an exhaust system including at least one cylindrical pipe sections, a storm collar and a vertical termination; each of said sections, collar and termination being comprised of steel including at least a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4×(C+N) and a maximum of 0.80 percent.   
   
   
       8 . The system of  claim 7  wherein the appliance includes a burning biomass fuel consisting primarily corn. 
   
   
       9 . A biomass fuel burning heating system, comprising:
 a biomass fuel appliance producing an exhaust containing at least one of NH 4 Cl, and KCl, and at least one of HNO 3  and H 2 SO 4 ; and   an exhaust system including at least one cylindrical pipe sections, being comprised of steel including at least a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4 ×(C+N) and a maximum of 0.80 percent.   
   
   
       10 . The system of  claim 9  wherein the biomass fuel produces an exhaust containing at least the following NH 4 C 1 , K 2 SO 4 , KCl, KHCO 3 , HNO 3  and H 2 SO 4 . 
   
   
       11 . The system of  claim 10  wherein the biomass fuel produces an exhaust with a temperature in the range of about 0-650 degrees Fahrenheit.