GAB Neumann GmbH
GAB-Neumann - Graphite Block Heat Exchangers
FromGAB Neumann GmbH
Graphite block heat exchangers are adapted to the heating, cooling, evaporation, condensation and absorption of highly corrosive liquid chemicals. This design is one of the most versatile type of impervious graphite heat exchangers. Rows of holes are drilled through graphite blocks both horizontally and vertically to form the process and service channels. Heat is transferred by conduction through the impervious graphite left between the rows of holes which separate the mediums being used. Graphite block heat exchangers consist in a stack of blocks encapsulated in a steel shell.
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Materials:
- Impervious graphite: GAB GPX1, GPX1T or GPX2
- Shell, Pressure plates and flanges: carbon steel or stainless steel
- Tie rods, nuts, bolts, washers, springs: stainless steel
- PTFE gaskets between the blocks
Design:
- Totally modular design: number of blocks, size of blocks and number of passes can be adjusted
- Different drilling diameters on process and service sides
- Maximum block diameter: 900 mm
- Graphite nozzles on product side
- Thermal expansion compensation ensured by tie rods and helical springs
Key Features:
- Design pressure: -1 barg (full vacuum) to +10 barg (145 psig)
- Design temperature: -60 to +200°C (-76 to 392°F)
- Heat transfer area: up to 163 m2 (1755 ft2)
- Design: according to European PED, ASME code, Chinese Pressure Vessel code and other national pressure vessel codes on request
Optional features:
- Removable headers for easy mechanical cleaning
- Rubber lined, glass lined or PTFE lined shell for corrosive fluids on shell side
- Very large drilling diameter to allow crystallization and prevent clogging
- Protection against abrasion
- Sight glass
- Outstanding corrosion resistance on one side or on both sides
- Good heat transfer performance thanks to adjustable cross sections on both sides
- Large transfer areas and comparatively low pressure drop on the product side
- Easy disassembly and ability to mechanically clean each block
- Impregnation before machining ensures resin free surfaces
- Single or double-row drillings on product side
- High operational safety
- Sturdy and modular design
- Short lead time
- Long lifetime
- Cooling, condensation, heating, evaporation and absorption of ultra-corrosive chemicals
- Heat transfer between two ultra-corrosive chemicals
- Best suited for single purpose units