56 



1 uight uian $1 50 



Office 5 00 



Total $26 75 



According to this estimate the manufacturing of peat into briquettes 

 costs about 85 cents per ton. 



PEAT ASA SOURCE OF PRODUCER GAS. 



In ordinary direct firing the object is to effect complete combustion 

 in proximity to the fuel bed. Within the same chamber the fuel elements 

 are vaporized, distilled, gasified and completely burned. The first two 

 processes absorb heat only and there are advantages in separating them 

 from the point where combustion of the gases occurs and where high tem- 

 peratures are developed by the heat evolved. The gas producer or gen- 

 erator accomplishes this. Within it vaporization, distillation and gasifica- 

 tion result in a combustible gas, which, led away to a separate combustion 

 chamber, is there burned under conditions favoring a fuller realization of 

 the fuel value and the attainment of temperatures otherwise impossible. 



Even with a close connection of producer to the furnace, and conse- 

 quent utilization of the sensible heat of the gas, there is a loss of energy, 

 but it should not exceed 15 to 18 per cent, of the calorific value of the 

 fuel. Notwithstanding this loss, experience has demonstrated that pro- 

 ducer gas accomplishes the same result with less fuel. It has made pos- 

 sible metallurgical operations which were impractical with direct firing, 

 and materials quite unsuited for heating operations are made available 

 by previous gasification in a producer. This is true of combustible sub- 

 stances containing much moisture, as wood, sawdust, peat, etc. The water 

 may be removed from the gases, which can then be applied to operations 

 requiring high temperature. 



The yield of producer gas from different fuels varies within wide limits.* 



Gas Yield per Pound 

 Material. in Cubic Feet. 

 Coke or charcoal 104 



Bituminous coals 75 



Brown coal 55 



Turf 45 



Wood 35 



*R. D. Wood, Industrial Applications of Producer Gas, p. 25 and p. 26. 



