Issues:
• Process unstable when entering deep vacuum
o Enter vacuum in a more controlled manner, fine-tune level control PID’s, place bigger balance tank.
• The times we lost the level in the dearator, the process remained in the “production” step. Automation should switch to product circulation when this happened.
o Modify step in PLC program
• When the balance tank ran dry, the product went into circulation (as intended), but the supply feed was stopped. This caused the system to run dry.
o Modify step in PLC program
• The target temperature of 28oC was not met.
o Lower speed of circulation pump
• The viscosity of the product was low.
o Ensure deep vacuum in order to stabilize homogenization temperature; Measure visco at higher frequencies, increase homogenization pressure at higher frequency.
• Low level of the buffer tank was not properly detected by the automation can only detect when 2 tanks are empty (usually the two buffer tanks are used in series).
o Place a low level switch in the discharge line to overrule the old level switches, which cannot be used efficiently by the new automation.
• Unusual high current for CP001.
o Talk with TetraPak on their design choice. Pump performs poor when running on SCM
Issues:• Process unstable when entering deep vacuumo Enter vacuum in a more controlled manner, fine-tune level control PID’s, place bigger balance tank.• The times we lost the level in the dearator, the process remained in the “production” step. Automation should switch to product circulation when this happened.o Modify step in PLC program• When the balance tank ran dry, the product went into circulation (as intended), but the supply feed was stopped. This caused the system to run dry. o Modify step in PLC program• The target temperature of 28oC was not met.o Lower speed of circulation pump• The viscosity of the product was low.o Ensure deep vacuum in order to stabilize homogenization temperature; Measure visco at higher frequencies, increase homogenization pressure at higher frequency.• Low level of the buffer tank was not properly detected by the automation can only detect when 2 tanks are empty (usually the two buffer tanks are used in series). o Place a low level switch in the discharge line to overrule the old level switches, which cannot be used efficiently by the new automation.• Unusual high current for CP001.o Talk with TetraPak on their design choice. Pump performs poor when running on SCM
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