METHOD FOR PRODUCING WHITE SUGAR, LIGHT BROWN SUGAR AND DARK BROWN SUGAR USING DIRECT RECOVERY PROCESS

摘要

THE PRESENT INVENTION RELATES TO A METHOD FOR PRODUCING WHITE SUGAR, BROWN WHITE SUGAR AND DARK BROWN SUGAR, THE METHOD INCLUDING: PRESSING AND JUICING SUGAR CANE TO EXTRACT SUGAR CANE JUICE; ADDING LIME TO THE JUICE AND REMOVING FOREIGN MATTER AND IMPURITIES FROM THE JUICE; VACUUM-CONCENTRATING THE FILTERED JUICE IN A FIRST VACUUM CONCENTRATOR TO PRODUCE A FIRST CRYSTAL SLURRY CONTAINING SUCROSE; CENTRIFUGING THE FIRST CRYSTAL SLURRY IN A FIRST HIGH-SPEED CENTRIFUGE INTO A FIRST CRYSTAL AND A FIRST MOTHER LIQUOR AND RECOVERING THE FIRST CRYSTAL AS DARK BROWN SUGAR OR TRANSFERRING THE FIRST CRYSTAL TO A SECOND VACUUM CONCENTRATOR; VACUUM-CONCENTRATING THE TRANSFERRED FIRST CRYSTAL IN THE SECOND VACUUM CONCENTRATOR TO PRODUCE A SECOND CRYSTAL SLURRY CONTAINING SUCROSE; CENTRIFUGING THE SECOND CRYSTAL SLURRY IN A SECOND HIGH-SPEED CENTRIFUGE INTO A SECOND CRYSTAL AND A SECOND MOTHER LIQUOR, TRANSFERRING THE SECOND LIQUOR TO THE PRESSING AND JUICING STEP, AND DRYING THE SECOND CRYSTAL TO PRODUCE BROWN WHITE SUGAR, OR TRANSFERRING THE SECOND CRYSTAL TO A THIRD VACUUM CONCENTRATOR; VACUUM-CONCENTRATING THE TRANSFERRED SECOND CRYSTAL IN THE THIRD VACUUM CONCENTRATOR TO PRODUCE A THIRD CRYSTAL SLURRY CONTAINING SUCROSE; AND CENTRIFUGING THE THIRD CRYSTAL SLURRY IN A THIRD HIGH-SPEED CENTRIFUGE INTO A THIRD CRYSTAL AND A THIRD MOTHER LIQUOR, TRANSFERRING THE THIRD MOTHER LIQUOR TO THE FIRST VACUUM CONCENTRATOR, AND DRYING THE THIRD CRYSTAL TO PRODUCE WHITE SUGAR. FIG. 4