276 



CHAPTER XIV 



Fig. 160 



The continuous settler known as the Colonial Sugar Co.'s type is shown 

 in Fig. 161. ihe dirty juice enters at a, and is constrained to flow in a 

 horizontal spiral by means of the baffle b. The deposit of dirt takes place 



in a direction at right angles to that of 

 flow. The clear juice overflows at c. 

 The mud deposited on the sides of the 

 cane is removed by the scraper d, and 

 d finally passes out of the S5^stem at e. 

 At the factory of the Hawaiian 

 Commercial and Sugar Co. there are 

 ten such settlers, each 18 feet in 

 diameter at the top, and 900 c. ft. in 

 capacity. As they treat the juice from 

 about 120 tons of cane per hour, the 

 rate of flow at exit calculated over the 

 whole capacity will be 1*5 feet per 

 hour. 



The continuous settling tank of 

 Come and Burguireres (U.S. patent 

 1,190,863) is shown in section in Fig. 

 162. The principle of this arrangement 

 is the preliminary deposition of the 

 dirt on the inclined planes, whence it 

 gradually falls off and drops vertically to the bottom of the tank. In the 

 last tank as the juice flows upwards it is strained through cloth. 



The Dorr continuous clarifier has recently been introduced into Cuba, 

 where it has been operated at the " Mercedita" Central of the Cuban- Ameri- 

 can Co. In Fig. 163 is shown an installation designed to heat the juice from 

 2,500 tons cane per day. It consists of a tank 20 ft. in diameter, and divided 

 into four compartments by the inclined trays a. Juice limed and heated 

 as usual to 212° F. enters 

 by the pipe h and fills the 

 tank by the large cen- 

 tral conduit c. That 

 mud which does not at 

 once fall to the bottom 

 deposits on the tray of 

 each compartment, 

 whence it is directed by 

 the slowly rotating scra- 

 pers d to the central 

 conduit, down which it 

 gravitates to the en- 

 trance to the pipe line e, 

 through which it is 

 drawn by the diaphragm 

 pump/, and sent to the 

 mud tanks. The clear 

 juice is drawn off from 

 the upper surface of each compartment through the pipes g, all of which ter- 

 minate in the inspection box h, whence the clear juice passes by way of k to the 

 evaporators. The pipe shown at / serves as a circulating pipe, and those at m 



