PROCESS FOR AUTOMATIC CONTROL OF SUGAR CLARIFICATION AND AUTOMATIC CONTROL SYSTEM FOR PERFORMING THE SAME Russian patent published in 2005 - IPC

FIELD: sugar making industry branch, possibly automatic control of clarification of raw sugar material.

SUBSTANCE: method for automatic control of clarification of sugar by means of sugar-containing solution in successively joined auger and horizontal sectional clarifying agitator at supplying sugar to auger comprises steps of controlling flow rate of sugar-containing solution to clarifying agitator depending upon concentration of dry matters in clarified product; supplying to auger catholyte with pH 10 - 11.5 and feeding to first section of clarifying agitator milk of lime; controlling flow rate of catholyte in such a way that in those section of clarifying agitator where clarifying process is going on for 4 - 6 min concentration of dry matters is in range 12 -18% and controlling flow rate of milk of lime in such a way that pH in the same section is in range 10.8 - 11.5; supplying sugar- containing solution to next sections of clarifying agitator along motion direction of sugar in it; measuring concentration of dry matters in order to control flow rate of sugar-containing solution in last section of clarifying agitator. Automatic control system for controlling clarification of sugar in successively joined auger and horizontal sectional agitator includes circuit for stabilizing concentration of dry matters of clarified product with use of pickup for measuring concentration of dry matters. Auger is provided with branch pipes for feeding catholyte into it. Clarifying agitator includes branch pipe for feeding lime of milk to first section. Pickup for measuring concentration of dry matters is arranged in last section of clarifying agitator. System includes in addition circuit for controlling quality of clarification having pickups for measuring pH and concentration of dry matters, both placed in one section of clarifying agitator and pickup for measuring catholyte flow rate; regulators and valves. One valve is mounted inline for feeding milk of lime and other valve is mounted inline for feeding catholyte.

EFFECT: enhanced efficiency of sugar clarification due to favorable conditions for decomposing reducing compounds, improved stability of concentration of clarified product.

2 cl, 1 dwg, 1 tbl