The top of the column has an internal overhead condenser which is mounted in the top head
This is 92.6 square meter 321 stainless steel ‘U’ tube
Carbon steel shell and head heat exchanger (overhead condenser)
Manufactured by Graham Manufacturing Ltd
Design pressure tube side 6.9 bar @ 150 deg C
Shell 6 bar + full vacuum @ 150 deg C, (208) 19.05 mm diameter x 14 swg x 3710 mm leg length 321 stainless steel ‘U’ tubes, 4-pass tube side
635 mm diameter carbon steel shell
(1) carbon steel bonnet head
System also has (1) 22.9 square meter 321 stainless steel ‘U’ tube
Carbon steel shell and head heat exchanger (bottoms cooler)
Manufactured by Johnson-Hunt Ltd
Design pressure tube side 6.9 barg @ 150 deg C
Shell 3.45 barg @ 150 deg C
(60) ¾” diameter x 16 swg x 3100 mm leg length 321 stainless steel ‘U’ tubes
2-pass tube side
406 mm diameter carbon steel shell
4028 mm overall length
(1) carbon steel bonnet head
Mounted on saddles
Process description: feed to the column enters two different 51 mm (2 inches) diameter nozzles
The feed in the previous service was 5500 mm/hour of mixed amines with methanol
An internal condenser (321 stainless steel) is used in the top of this column to condense the methanol in the overhead stream
The condensed methanol is collected in a catch pan
Some is used for the column reflux and the remainder is sent to storage
In the previous service, 1400 mm/hour of methanol was recovered
Live-steam is injected into the bottom of the column to provide the separation momentum
In the previous service, the live steam injection was 2500 mm/hour of 2.8 bar (40-psig) steam and the bottoms flow was 6.5 mt/hr of mixed amines and water
Specifications
Capacity: 950mm to 1000mm diameter
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