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| Oil, Gas & Chemical |
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Custody Transfer Mixer
| Komax Custody Transfer Mixer or CT mixer are installed upstream of the sampling point in a crude oil transfer line. They assure that the bottom sediment and water – B, S & W – is thoroughly dispersed throughout the crude oil stream. An even water droplet size and distribution occurs over a wide flow range. This means that the automatic sampler takes a truly representative sample. |
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CHEVRON SHIP LOADING TERMINAL MORRO BAY CALIFORNIA.
THE TWO 20" KOMAX CT- MIXERS SAVED 3 MILLION DOLLARS THE VERY FIRST YEAR DUE TO IMPROVED MIXING BEFORE SAMPLING. EXPECTED MIXER LIFE - 20 YEARS.
Komax CT mixers are installed in petroleum product transfer lines such as ship and tank truck terminals or refinery transfers in combination with a LACT unit. CT mixers are supplied with weld neck flanges or ends prepared for welding. For ease of installation Komax CT mixers are supplied complete with two inch flanged port for the automatic sampler connection. Dimensions and design graphs for all CT mixers are listed below.
Special features provide effective mixing.
| The Komax CT mixer was specially designed to solve conventional custody transfer mixing problems. The CT mixer may be installed in a horizontal or vertical pipeline. In a horizontal line, the first mixing element is set 30 degrees off the centerline so the bottom mixing element ear acts as a ramp, forcing the bottom water up into the crude (see Figures 1 and 2). The internal vortices or back-mixing created by the Komax mixing elements also rotate the blend backwards from wall to eliminates any wall streaming and produces a very uniform distribution and droplet size of the water in the crude. |
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| A very important feature of the Komax CT mixer is the addition of a special, last mixing element that cancels all of the axial rotation of the flow downstream of the mixer. Violent rotation of the stream would cause the centrifuging problem (barber poling) of the water to re-occur. The automatic sampler is located two to four pipe diameters downstream of the mixer. The resulting samples provide highly reliable net crude oil measurements. |
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KOMAX CUSTODY TRANSFER (CT) STATIC MIXER
PRODUCT DEVELOPMENT HISTORY SYNOPSIS
Over twenty five years ago, the Chief Engineer of Chevron Pipeline Company in Concord , California approached KOMAX Systems seeking assistance in development of a low pressure drop static mixer designed specifically to optimize accuracy of crude oil sampling.
After months of intensive product development and laboratory testing, KOMAX engineers derived the Custody Transfer (CT) mixer design as a recommended solution to Chevron Pipeline mixing application.
To observe the mixing performance of various static mixer designs, clear mineral oil was pumped through transparent glass piping system prototypes to simulate crude oil. Dyed water was injected into this mineral oil process stream to simulate BS & W (bottom sediment and water).
Over sixty petroleum engineers from several major oil companies visited KOMAX to witness this testing since errors in crude oil sampling were an industry-wide problem plaguing profitability.
Photo of a KOMAX CT mixer in action illustrates the extraordinary results these engineers witnessed. It is clear to see the fully homogeneous dispersion of the dyed water into the clear mineral oil immediately downstream of the mixer, even at low fluid velocities.
Over 8,000 CT mixers have since been installed worldwide and this remarkably efficient device is now considered an industry standard for custody transfer applications. As a result of the spectacular results obtained mixing BS & W into crude oil process streams prior to sampling, KOMAX Custody Transfer mixers have been proven to pay for themselves in as little as six hours.
KOMAX CUSTODY TRANSFER STATIC MIXER
CRUDE OIL SHIP OFF LOADING
 Tanker --- 300,000 Barrels
Off Loading Time: Under 24 hours.
Off loading Lines: 14 inch. (pair)
Crude Flow Rate: 12,000 gpm (two 14” lines)
14" Komax CT Mixers – Detect Additional 0.5% BS&W
0.5% = 1500 barrels @ $100.00 bbl. = $150,000.00
Komax CT mixer installation payback: Under 4 hours.
Over 8000 Komax CT mixers have been installed world wide. Typical BS&W detected is an additional 1.0% and higher over other inline mixing methods such as the standard vertical pipe loop used for mixing.www.komax.com
CT Mixer without side sampler port
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