Abstract: A combustion system includes a primary combustion chamber divided into left and right sides by fuel-retaining standards defining a canyon or void extending into a secondary combustion chamber is provided. The floor of the primary combustion chamber and the fuel-retaining standards direct the burning solid fuel toward the lower part of the canyon, while at the same time retaining the non-burning solid fuel on either side of the fuel-retaining standards. The combustion system further includes an air delivery system having a lower air tube supplying high and low velocity air and an upper air tube. The lower air tube is positioned proximate to a firebox floor, while the upper air tube is positioned within the secondary chamber. Automatic air setting mechanisms are provided so that proper air settings can be maintained during various phases of a fire.

Abstract: The disclosure relates to a method for continuously measuring the concentration of water in a gas stream. Several stations are utilized to perform the measuring function and to particularly determine the amount of moisture in the sample gas stream. The gas sample is extracted from a duct and initially condensed at a relatively lower temperature to further extract heavy organic materials. The gas stream is then subjected to a first orifice in a heated oven to measure the gas flow before water vapor has been condensed out. After this measuring step the gas is subjected to an ice bath and a drying column to extract the water vapor from the gas sample. The flow rate dried gas sample is again measured by an orifice in a controlled environment. The molar flow rates can be compared to determine the water concentration of the flue gas.