Silicon carbide block heat exchangers
CORRESIC® silicon carbide block heat exchangers are adapted to the heating, cooling, evaporation, condensation and absorption of highly corrosive and/or oxidizing chemicals. This design is one of the most versatile type of silicon carbide heat exchangers. Rows of holes are drilled through the silicon carbide blocks both horizontally and vertically to form the process and service channels. Heat is transferred by conduction through the silicon carbide left between the rows of holes which separate the mediums being used. SiC block heat exchangers consist in a stack of blocks encapsulated in a steel shell.
Snapshots
Cold isostatic pressing of a silicon carbide block
Cold isostatic pressing is a powder compaction method conducted at room temperature and involving applying pressure from multiple directions through a liquid medium surrounding the compacted part. A flexible mold immersed in a pressurized liquid medium is used. The material used to manufacture silicon carbide blocks is produced by cold isostatic pressing.
Deep drilling of a silicon carbide block
After cold isostatic pressing the silicon carbide blocks are precisely machined and deep drilled with computer numerical controlled machines.
Deep drilling of a silicon carbide block
After cold isostatic pressing the silicon carbide blocks are precisely machined and deep drilled with computer numerical controlled machines.
Deep drilling of a silicon carbide block
After cold isostatic pressing the silicon carbide blocks are precisely machined and deep drilled with computer numerical controlled machines.
Sintering of silicon carbide parts in a vacuum furnace
After machining the silicon carbide blocks are sintered at high temperature in a vacuum furnace.
SE type silicon carbide block
Our SE SiC blocks are made of pressureless sintered SiC thus guarantying their outstanding corrosion resistance.
Numerous SE type Silicon carbide blocks
Numerous SE type SiC blocks before their assembly in a block heat exchanger.
SE type Silicon carbide block
Our largest SE SiC block seen from the side.
3D Renderings
SE 16, 26 and 35 silicon carbide blocks
GAB Neumann has developed SiC blocks with different drilling patterns and hole diameters on process and services sides to better adapt to customers’ specific requirements
SE 35 silicon carbide blocks
In order to best fit with customers’ process requirements GAB Neumann has developed different types and sizes of SiC blocks
SE 16 SiC block heat exchanger with silicon carbide blocks and headers in a carbon steel shell
SE 16 type SiC block heat exchangers can be fitted with silicon carbide, PTFE lined steel or glass lined steel headers
SE 26 SiC block heat exchanger with 8 blocks
SE 26 type SiC block heat exchangers with silicon carbide headers.
Cross section of a SE 26 SiC block heat exchanger with 8 blocks
Cross section of SE 26 type SiC block heat exchangers with silicon carbide headers.
Baffle arrangement
Baffle arrangement in a SE 26 block heat exchanger with 8 blocks.
3D Animations
Materials:
- CORRESIC® pressureless sintered silicon carbide blocks and headers
- 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
- Different block diameters: 160, 260 and 350 mm
- Silicon carbide, PTFE lined steel or glass lined steel headers on product side
- Thermal expansion compensation ensured by stainless steel expansion bellow on the shell
Key Features:
- Design pressure: -1 barg (full vacuum) to +16 barg (230 psig)
- Design temperature: -60 to +220°C (-76 to 428°F)
- Heat transfer area: up to 22 m2 (238 ft2)
- Design: according to European Pressure Equipment Directive 2014/68/EU (PED) or ASME Code
Key Benefits:
- Outstanding corrosion resistance against acid, bases and oxidizing media
- Good heat transfer performance thanks to adjustable cross sections on both sides
- Easy disassembly
- Ability to mechanically clean each block
- Second hardest material existing on earth thus eliminating any risk of erosion
- High operational safety
- Compact, sturdy and modular design
- Short lead time
- Long lifetime
Optional features:
- Removable headers for easy mechanical cleaning
- Sight glass
Main applications:
- Cooling, condensation, heating, evaporation and absorption of ultra-corrosive and/or oxidizing chemicals or ultra-pure chemicals.
- Suited for multi-purpose or single purpose units
Technical documentation
Block heat exchangers
A block heat exchanger is a device which transfers heat from one medium to another without direct contact between fluids. For material properties, cost and efficiency reasons block heat exchangers only exist in silicon carbide and impervious graphite. Rows of holes are drilled through the blocks both horizontally and vertically to form the process and service channels. Heat is transferred by conduction through the exchanger material left between the rows of holes which separate the mediums being used. Silicon carbide blocks are cylindrical. SiC block heat exchangers consist in a stack of blocks encapsulated in a steel shell.
The thermal performance of block heat exchangers can vary significantly. It is therefore essential to select the type and size of block heat exchanger that is the most adapted to the specific application and industrial process. There are a number of considerations including flow rate, pressure drop, risk of erosion, design pressure and temperature, materials compatibility, fouling, and many more that should be taken in account.
GAB Neumann’s CORRESIC® Silicon carbide block heat exchangers SE Series
GAB Neumann’s silicon carbide block heat exchangers are designed to cool down, condense, heat up, evaporate or absorb ultra-corrosive chemicals. Safety, reliability, and performance on the long-term are our primary considerations when we size, design and manufacture our SiC block heat exchangers.
Our extended and highly customizable block heat exchanger portfolio enables us to provide particularly adapted solutions to ultra-corrosive heat transfers. All our cylindrical block heat exchangers’ designs are totally modular to best fit with individual process specification. The number and size of blocks, the number and diameters of holes as well as the number of passes both on process and service sides can be adapted to best meet the velocities, pressure drops, and heat transfer requirements.
They can be fitted with all kinds of optional features such as sight glasses or demountable headers to better fit the process requirements.
All our SiC block heat exchangers are machined before sintering thus guarantying a smooth heat transfer surface and ensuring their outstanding corrosion resistance.
Industrial processes:
- Crop protection
- Fine chemicals
- Active pharmaceutical ingredients
- Stainless-steel pickling
- Fire retardants
- Flavors and fragrances
- Vitamins
- Coagulants
- Treatment, purification and concentration of spent acids
- and many more…
Associated products
GAB Neumann GmbH
Alemannenstrasse 29
79689 Maulburg
Germany
GAB Neumann GmbH | Alemannenstrasse 29 | D-79689 Maulburg | Phone +49 (7622) 6751 0 | Fax +49 (7622) 6751 20 | E-Mail info@gab-neumann.de | www.gab-neumann.com