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.
Details of a graphite block
Heat exchange blocks consist in solid graphite blocks that are drilled with rows of holes in horizontal and vertical directions
Different sizes of graphite blocks
In order to best fit with customers’ process requirements GAB Neumann has developed different types and sizes of graphite block heat exchangers
Graphite block heat exchanger equipped with a PTFE lined shell
If required the shell can be PTFE lined in order to allow heat transfer between two corrosive fluids
GE21 Block
GAB Neumann offers graphite block heat exchangers of different sizes
GE21 Block
GAB Neumann offers graphite block heat exchangers of different sizes
GZ35 Block
GAB Neumann offers graphite block heat exchangers of different sizes
GE41 Block
GAB Neumann offers graphite block heat exchangers of different sizes
Vertical GE35 graphite block heat exchanger
Graphite block heat exchangers consist in a stack of graphite blocks encapsulated in a steel shell. The blocks are drilled in perpendicular directions. The heat transfer takes place in the graphite walls between the holes.
Horizontal GZ21 graphite block heat exchanger
GAB Neumann’s graphite heat exchangers can be installed either vertically, horizontally, or with a slope.
Vertical GE41 graphite block heat exchanger with custom made expansion system and a demountable header.
A heat exchanger can be adapted to specific process requirements, here with a removable header for easy cleaning of the process side and a custom made expansion system.
Vertical block heat exchanger of the GE/GZ series
Graphite block heat exchangers consist in a stack of graphite blocks encapsulated in a steel shell.
A block heat exchanger is a process 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 impervious graphite and silicon carbide. 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. Impervious graphite blocks can be cubic or cylindrical. Silicon carbide blocks are cylindrical. Graphite 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 impervious graphite block heat exchangers are designed to cool down, condense, heat up, evaporate, sublime, crystallize, or absorb ultra-corrosive chemicals. Safety, reliability, availability, and performance on the long-term are our primary considerations when we size, design and manufacture 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 impervious graphite block heat exchangers are machined after phenolic resin impregnation thus guarantying a heat transfer surface totally free of resin and ensuring therefore the highest possible heat transfer rate.
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