190 



FEEDING WITH SUGAR BEETS, SUGAR, ETC. 



FIG. 21. 



wide, 18 feet long and 15 feet high. In its interior are four 

 horizontal troughs, placed one over the other, each of whieh has 

 a steam jacket. In each trough is a 

 rotating, horizontal, tubular cluster, 

 6r, through which steam circulates, 

 consequently the hashed cossettes are 

 heated in the troughs and also heated 

 during their rotating motion. The 

 product being dried falls successively 

 from one trough to another and circu- 

 lates the entire length of each. When 

 the dried cossettes finally leave the 

 apparatus, another rotating device, in 

 which there is no air, helps the empty- 

 ing. The moist air from the oven is 

 removed with a ventilator, the air pass- 

 ing through an arrester which retains 

 all the solid particles in suspension. 

 The entire motive power of the dryer 

 is transmitted by gearing outside of 

 the dryer. The dryer proper is metal; 

 the exterior covering, however, is wood. 

 The dried residuum leaves the dryer 

 at 30 C. (86 F.). In different parts 

 of the dryer the maximum temperature 



is 110 C. (230 F.). It is maintained that the following trans- 

 formations take place: One hundred pounds of residuum pulp 

 with 10 per cent, dry matter may be considered to have been 

 obtained from 200 pounds of beets, giving 67 pounds cossettes, 

 w r ith 15 per cent, dry matter and only 11 pounds of dried 

 product containing 90 per cent, of dry substances. German 

 experience would appear to show that there w r as needed for the 

 drying 80 pounds of coal per 100 pounds of dried cossettes, 

 without allowance being made for the motive power. Calcu- 

 lated upon a basis of one ton of beets, this means that 120 

 pounds dried product demand 110 pounds coal. For the pro- 

 duction of 10 tons of dried cossettes in 24 hours, frhere is needed 

 a force of 50 H.P. It must not be forgotten that in the 



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End View and Section of 

 Steam Dryer. 



