Crude juice purification with reduced lime consumption

Abstract

The present invention relates to an improved method for the purification of crude sugar beet juice. The present invention relates moreover to methods for the manufacture of non-sucrose substance combinations from crude sugar beet juice, as well as two devices for the purification of crude sugar beet juice. The measures according to the invention allow a reduction of lime consumption during the purification.

1 . Device comprising:
 a first alkalinization container for preliming, wherein the first alkalinization container comprises an inlet for a crude juice, a metering device for metering lime milk, and an outlet for a preliming juice;   a second alkalinization container for a first mainliming, wherein the second alkalinization container comprises an inlet for a preliming juice, a metering device for metering of lime milk, and an outlet for a limed crude juice, and wherein the second alkalinization container inlet connects to the outlet of the first alkalinization container;   a first heat exchanger for heating a limed crude juice, wherein the heat exchanger comprises an inlet for limed crude juice and an outlet for heated limed crude juice, and wherein the heat exchanger inlet connects to the outlet of the second alkalinization container, and the heat exchanger outlet connects to the inlet of a first separation device; and   a first separation device for clarification of a limed crude juice and separation of a non-sucrose substance containing fraction, wherein the first separation device comprises an inlet for a limed crude juice, an outlet for a non-sucrose substance containing fraction, and an outlet for a clarified limed crude juice, and the first separation device inlet connects to the outlet of the second alkalinization container.   
     
     
         2 . Device according to  claim 1 , wherein the separation device is a static decanter. 
     
     
         3 . Device according to  claim 2 , further comprising:
 a second separation device for the concentration of a non-sucrose substance-containing fraction and separation of a sucrose-containing fraction, wherein the second separation device comprises an inlet for a non-sucrose substance containing fraction, and a first outlet for a concentrated non-sucrose substance containing fraction, and a second outlet for a clear sucrose-containing fraction, and wherein the second separation device inlet connects to the outlet of the first separation device.   
     
     
         4 . Device according to  claim 3 , wherein the second separation device second outlet connects to the inlet of the first heat exchanger. 
     
     
         5 . Device according to  claim 3 , further comprising:
 a third alkalinization container for a second mainliming, wherein the third alkalinization container comprises an inlet for a clear limed crude juice, a metering device for the metering of lime milk and an outlet for a limed crude juice, and wherein the third alkalinization container inlet connects to the outlet of the first separation device.   
     
     
         6 . Device according to  claim 5 , comprising:
 a second heat exchanger for heating a clarified limed crude juice before a second mainliming, wherein the heat exchanger comprises an inlet for a clarified limed crude juice and an outlet for a heated clarified limed crude juice, and wherein the second heat exchanger inlet connects to the outlet of the first separation device, and the second heat exchanger outlet connects to the inlet of the third alkalinization container.   
     
     
         7 . Device according to  claim 1 , wherein the separation device is a dynamic decanter. 
     
     
         8 . Device according to  claim 7 , further comprising:
 a second separation device for the concentration of a non-sucrose substance-containing fraction and separation of a sucrose-containing fraction, wherein the second separation device comprises an inlet for a non-sucrose substance containing fraction, and a first outlet for a concentrated non-sucrose substance containing fraction, and a second outlet for a clear sucrose-containing fraction, and wherein the second separation device inlet connects to the outlet of the first separation device.   
     
     
         9 . Device according to  claim 8 , wherein the second separation device second outlet connects to the inlet of the first heat exchanger. 
     
     
         10 . Device according to  claim 8 , further comprising:
 a third alkalinization container for a second mainliming, wherein the third alkalinization container comprises an inlet for a clear limed crude juice, a metering device for the metering of lime milk and an outlet for a limed crude juice, and wherein the third alkalinization container inlet connects to the outlet of the first separation device.   
     
     
         11 . Device according to  claim 10 , further comprising:
 a second heat exchanger for heating a clarified limed crude juice before a second mainliming, wherein the second heat exchanger comprises an inlet for a clarified limed crude juice and an outlet for a heated clarified limed crude juice, and wherein the second heat exchanger inlet connects to the outlet of the first separation device, and the second heat exchanger outlet connects to the inlet of the third alkalinization container.   
     
     
         12 . Device according to  claim 1 , further comprising:
 a second separation device for the concentration of a non-sucrose substance-containing fraction and separation of a sucrose-containing fraction, wherein the second separation device comprises an inlet for a non-sucrose substance containing fraction, and a first outlet for a concentrated non-sucrose substance containing fraction, and a second outlet for a clear sucrose-containing fraction, and wherein the second separation device inlet connects to the outlet of the first separation device.   
     
     
         13 . Device according to  claim 12 , wherein the second separation device second outlet connects to the inlet of the first heat exchanger. 
     
     
         14 . Device according to  claim 12 , further comprising:
 a third alkalinization container for a second mainliming, wherein the third alkalinization container comprises an inlet for a clear limed crude juice, a metering device for the metering of lime milk and an outlet for a limed crude juice, and wherein the third alkalinization container inlet connects to the outlet of the first separation device.   
     
     
         15 . Device according to  claim 14 , further comprising:
 a second heat exchanger for heating a clarified limed crude juice before a second mainliming, wherein the second heat exchanger comprises an inlet for a clarified limed crude juice and an outlet for a heated clarified limed crude juice, and wherein the second heat exchanger inlet connects to the outlet of the first separation device, and the second heat exchanger outlet connects to the inlet of the third alkalinization container.   
     
     
         16 . Device according to  claim 1 , further comprising:
 a third alkalinization container for a second mainliming, wherein the third alkalinization container comprises an inlet for a clear limed crude juice, a metering device for the metering of lime milk and an outlet for a limed crude juice, and wherein the third alkalinization container inlet connects to the outlet of the first separation device.   
     
     
         17 . Device according to  claim 16 , further comprising:
 a second heat exchanger for heating a clarified limed crude juice before a second mainliming, wherein the second heat exchanger comprises an inlet for a clarified limed crude juice and an outlet for a heated clarified limed crude juice, and wherein the second heat exchanger inlet connects to the outlet of the first separation device, and the second heat exchanger outlet connects to the inlet of the third alkalinization container.   
     
     
         18 . Device according to  claim 17 , wherein the second separation device second outlet connects to the inlet of the first heat exchanger. 
     
     
         19 . Device according to  claim 1 , further comprising:
 a second heat exchanger for heating a clarified limed crude juice before a second mainliming, wherein the second heat exchanger comprises an inlet for a clarified limed crude juice and an outlet for a heated clarified limed crude juice, and wherein the second heat exchanger inlet connects to the outlet of the first separation device.