presentation montz-kaibel for divided wall technology

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Unfixed Wall: The Key to a Breakthrough in Dividing Wall Column Technology

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B. Kaibel, H. Jansen, T. Rietfort, E. ZichJulius MONTZ GmbH, Hilden, Germany

Z. OlujicTU Delft, Process & Energy Department, Delft, the NetherlandsMay 05th, 2007

EFCE B. Kaibel Fluid Separations, Z. Olujic Symposium, Symposium, Delft, NL WP on / Z. Olujic, EFCE WP on Fluid Separations, Z. Olujic May 05th, 2007, Delft, NL

1

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Overview Dividing wall column concept introduced: - 1935 by Monro (US 2,134,882) and - 1946 by Wright (US 2,471,134) as a concept design for tray columns. First commercial application in 1985 by BASF, as a packed column (Montz-Pak A3 packing)

May 05th, 2007

B. Kaibel / Z. Olujic, EFCE WP on Fluid Separations, Z. Olujic Symposium, Delft, NL

2

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Dividing Wall Column - a rising distillation star80 70 60 50 40 30 20 10 0 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

Number of DWCs delivered by Montz over the years

Non-welded dividing wall

May 05th, 2007

B. Kaibel / Z. Olujic, EFCE WP on Fluid Separations, Z. Olujic Symposium, Delft, NL

3

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Range of Applications

Diameter Height Theoretical trays Pressure Purities

0.04 m - 4.0 m 2.5 m - 74 m up to 100 2 mbar - 10 bar normal purity demands up to electronic grade specifications (< 1 ppm)

May 05th, 2007

B. Kaibel / Z. Olujic, EFCE WP on Fluid Separations, Z. Olujic Symposium, Delft, NL

4

4 component DWC

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Dividing Wall ColumnsSeparation of a three and four component mixture

A

A

A,B,C

A,B,C,D B

B C

Welded or non-welded dividing wallC D

May 05th, 2007

B. Kaibel / Z. Olujic, EFCE WP on Fluid Separations, Z. Olujic Symposium, Delft, NL

5

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Dividing Wall ColumnsMain advantages Lower investment costs Lower energy demand Smaller plant size Minimized residence time Better yields High flexibility

Main drawbacksOne operating pressure Higher pressure drop Higher temperature difference Column height

May 05th, 2007

B. Kaibel / Z. Olujic, EFCE WP on Fluid Separations, Z. Olujic Symposium, Delft, NL

6

DW-arrangements 3

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Dividing Wall ColumnsColumn set-up: Feed/Side product offset A B B > C

A B B < CA,B,C

A

A

B A,B,C B

CMay 05th, 2007 B. Kaibel / Z. Olujic, EFCE WP on Fluid Separations, Z. Olujic Symposium, Delft, NL

C7

DW-arrangements 2

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Dividing Wall ColumnsColumn set-up: Off-center dividing wall arrangements

. . . mB