Conventional purifiers handle fuel oil densities of up to 991 kg/ m3 at 15°C and require manual adjustment of the gravity disc to achieve optimum separation results.
Alcap separators handle fuel oil densities of up to 1010 kg/ m3 at 15°C, automatically adjusting operation to the nature of the oil.
Operating principle
Dirty, pre-heated oil is continuously fed to the ALCAP separator, which essentially operates as a clarifier. Clean oil is continuously discharged from the cleaned oil outlet. Separated sludge and water
accumulate at the periphery of the bowl.
When separated water approaches the disc stack, traces of water start to escape with the cleaned oil. This minor increase in water content of the cleaned oil is detected by the transducer, which is installed in the cleaned oil outlet.
The transducer continuously measures changes in water content. No absolute values of water content or volume are involved. The transducer measures the deviation from a non-calibrated reference value and transmits a signal to the EPC 60 process controller for interpretation.
The EPC 60 process controller stores a new reference value after the transducer stabilization time that follows every sludge discharge sequence has elapsed.
At the trigger point, which is when the water content in cleaned oil reaches its maximum allowable deviation of approximately 0.2 percent in water content, the EPC 60 process controller initiates an automatic discharge of the water that has accumulated in the separator bowl.
Transducer operating principle
The transducer includes a cylindrical capacitor through which the full flow of cleaned oil passes, forming a dielectric medium. The working principle of the transducer exploits the large difference
between the dielectric constants of mineral oil and water.
Dielectric constant (Approximate values)
Mineral oil: 2–4
Water: 80
The dielectric constant of oil contaminated with water increases when the water content of the oil increases, and vice versa. Changes in the dielectric constant of the cleaned oil are very sensitive, convenient measures of changes in its water content.
Alcap separators handle fuel oil densities of up to 1010 kg/ m3 at 15°C, automatically adjusting operation to the nature of the oil.
Operating principle
Dirty, pre-heated oil is continuously fed to the ALCAP separator, which essentially operates as a clarifier. Clean oil is continuously discharged from the cleaned oil outlet. Separated sludge and water
accumulate at the periphery of the bowl.
When separated water approaches the disc stack, traces of water start to escape with the cleaned oil. This minor increase in water content of the cleaned oil is detected by the transducer, which is installed in the cleaned oil outlet.
The transducer continuously measures changes in water content. No absolute values of water content or volume are involved. The transducer measures the deviation from a non-calibrated reference value and transmits a signal to the EPC 60 process controller for interpretation.
The EPC 60 process controller stores a new reference value after the transducer stabilization time that follows every sludge discharge sequence has elapsed.
At the trigger point, which is when the water content in cleaned oil reaches its maximum allowable deviation of approximately 0.2 percent in water content, the EPC 60 process controller initiates an automatic discharge of the water that has accumulated in the separator bowl.
Transducer operating principle
The transducer includes a cylindrical capacitor through which the full flow of cleaned oil passes, forming a dielectric medium. The working principle of the transducer exploits the large difference
between the dielectric constants of mineral oil and water.
Dielectric constant (Approximate values)
Mineral oil: 2–4
Water: 80
The dielectric constant of oil contaminated with water increases when the water content of the oil increases, and vice versa. Changes in the dielectric constant of the cleaned oil are very sensitive, convenient measures of changes in its water content.
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