Application Bulletin LAKOS Decreases Waste and Increases Efficiency In Sugar Cane Mills EXAMPLE #1 Application: System Identification:
Pre-filtration to clarification process and protection of downstream pumps, impellers, and heat exchangers LAKOS Dual Stage Stainless Steel Super Separators (Two-Stage JPX System)
Solids: Liquid: Problem/Challenge:
and purge handling equipment Sand, grit, and very fine sugar cane bagasse Raw sugar cane juice Sugar cane juice with high levels of extraneous matter (soil, dirt, grit) impacts the capacity and efficiency of milling, processing and boiler operations.
When sugar cane is cut and taken to the sugar mill for processing, different quantities of dirt, solids and grit are loaded with the stalks, depending on the harvesting mechanization and weather conditions. Despite the pre-crush washing process, large amounts of solids are carried into the juice extraction process. Juice clarification is an important step in sugar production. Heavy solids contamination -- sand, grit, and very fine sugar cane bagasse -- must be separated from the raw juice in order to ensure the best quality final product. Typically, a strainer (DSM, rotational or vibration) is used after the crushing and prior to the clarification process. These strainers use various screen mesh (0.2mm to 0.7mm). A LAKOS high performance dual stage, Super Separator configruation and purge handling equipment is installed between the strainer and the clarifier, removing the bulk of the solids from the raw juice prior to the juice reaching the clarification process. The clarification process is used to remove small impurities that may be soluble, colloidal or insoluble.
Pre-Filtration to Clarifier in Argentina
Effective solids handling of the removed solids from the LAKOS system allows sugar mills to reclaim valuable sugar cane juice from the solids and limit valuable juice loss, saving money. (Continued on reverse)
AB-219 (11/09)
The use of a LAKOS dual stage Super Separator in the pre-treatment stages of sugar cane milling processes provides the following benefits: • Reduce the solids load of separable solids 98% of 44 micron on the clarifiers • Allow the clarifiers to work more efficiently on smaller impurities, soluble and colloidal materials.
LAKOS Decreases Waste and Increases Efficiency In Sugar Cane Mills EXAMPLE #2 Application: Solids: Liquid: LAKOS Solution:
LAKOS installed in the Clean-In-Place system Scale and chemical fouling CIP liquid cleaning solution LAKOS Stainless Steel Separators and purge handling equipment.
Heat exchangers are used for pre-heating the juice before being fed to the first unit of the evaporation line. The evaporation process leads to the formation of mineral and silt deposits, leading to fouling on the inner surface of the evaporator tubes. Mineral deposits inside the tubes act as insulation, thus causing higher heat transfer resistance. As a consequence of the formation of solid deposits on heating surfaces, evaporative rates decrease with time. It is important in sugar processing environments to keep the heat transfer capability as high as possible. The common practice to mitigate fouling is to implement automatic clean-in-place (CIP) operations. LAKOS Stainless Steel Separators help to keep unwanted solids from clogging CIP Systems. The need for continuous operation (with little or no downtime) is critical for CIP operating efficiency … and LAKOS Separators meet that need with continuous operation, automatic solids flushing, and a low and steady pressure loss.
Sugar Mill in Argentina Clean-In-Place System Closeup View
Typical Sugar Mill Filtration Installations LAKOS Separator for Elimination of Sand From “Sour Water” (raw sugar beet LAKOS SEPARATOR FOR ELIMINATION OF SAND FROM “SOURjuice) WATER” - ( raw sugar beet juice )
BEET PULP PRESS
LAKOS SEPARATOR DIFFUSER HEATER
PRESS WATER
PUMP
Sand Removal from Raw Sugar Juice To the sugar process By-pass
The separator removes sand from raw sugar beet juice
Purge Tank
LAKOS SEPARATOR: LAX-0509-B/PU
SAND REMOVAL FROM RAW SUGAR JUICE
Sand from the purge is evacuated to a decantation tank outside the factory, by special sludge pump. Pumps Beet pulp press
Scrubber Wash System
PLANT EFFLUENT WATER
SCRUBBER TOWER
SMOKE STACK
PUMP
FROM INCINERATOR THRU VENTURI
B A
LAX
LFD
LAKOS Super Separator Configuration
ASH THICKENER PURGE LIQUID CONCENTRATOR
TO LAND FILL/ RECLAMATION
ASH SLURRY PUMP
DRAIN BACK TO FILTRATION DEWATERED SLUDGE SAND SEPARATING SCREW CONVEYOR
Sugar Cane Wash Filtration and Solids Purging System SUGAR CAN WASH FILTRATION AND SOLIDS PURGING SYSTEM BACK TO SPRAY WASH SYSTEM
DISCHARGE MANIFOLD
FROM THE SCALE/SEDIMENTATION TANKS INTAKE MANIFOLD
A
B
C
LAX 2002
LAX 2002
LFD 2002
A B C D
D LFD 2002
PINCH VALVES
DRAIN WATER BACK TO INTAKE
SAND-SEPARATOR SCREW CONVEYOR
PURGE SOLIDS
LAKOS Separators
Filtering Sugar Juice From Crushers CRUSHERS CRUSHED FIBERS SENT TO BLACKSTRAPPING PROCESS TO RECOVER BARRELL SYRUP OR MOLASSES
STRAINER
LAX 502
PUMP LFD 502
LAKOS Super Separator Configuration
LIME. CANE JUICE AND HOT WATER
B
A TO CLARIFIER HEATER
CONCENTRATOR PINCH VALVE
PURGE DIFFUSER
DRAINED LIQUID DECANTED AND SENT BACK TO BLACKSTRAPPING/ BARREL SYRUP (MOLASSES) RECOVERY OR BACK TO CRUSHERS
HOPPER
PURGED SOLIDS GOES TO DIGESTER TANKS FOR FURTHER RECOVERY OF METHANE GASE OR FOR SOIL CONDITIONING ON FARMLANDS
Sugar Processing Mills Raw SUGAR PROCESSING MILLS Sugar Cane/Beets RAW SUGAR CANE/BEETS
SPRAY WASH STATION
FIBERS TO INCINERATION/ POWER CO-GEN
CRUSHER STATION
SHREDDER STATION
DIGESTER TANKS CANE JUICE
CANE KNIFE CANE LEVELER
FILTERED WATER BACK TO PROCESS
FILTER
PUMP
A
EVAPORATOR
LIME JUICE & HOT WATER
CLARIFIER
PUMP
TO SLUDGE STORAGE FOR SOIL CONDITIONING / DIGESTER TANKS
CLEAR JUICE
SYRUP
VACUUM PAN SYRUP & SUGAR CRYSTALS
B
CENTRIFUGE
HEATER
TO SLUDGE STORAGE FOR SOIL CONDITIONING/ DIGESTER TANKS
C
RAW SUGAR PUMP TO REFINERY
STORED SUGAR
1365 N. Clovis Avenue • Fresno, California 93727 USA Telephone: (559) 255-1601 • Fax: (559) 255-8093 Toll-Free: (800) 344-7205 (USA, Canada & Mexico) www.lakos.com • E-mail:
[email protected]
A B C
LAKOS Separators
