The cleaning process is a non-destructive method for dry on-line cleaning adapted specially for induced & forced draft air cooled heat exchangers. We propel Sodium Bicarbonate (Baking Soda) with compressed air through a blasting unit and out of a special blast nozzle.
What blasting material is used?
The blasting material consists of formulated sodium bicarbonate (also known as baking soda) having a crystalline structure that has a naked eye appearance of course granular sugar as opposed to the conventional powdery baking soda. The process of cleaning is an extremely friable material that has micro fragmentation on impact, literally exploding away surface materials without damage to the substrate. The unique properties of baking soda allow it to remove dust, grease, oil, soot, pollen and other contaminants without damaging the thin metal sheet of the fins of the air cooled heat exchangers tube. There are no other blast media that have the same characteristics.
The cleaning process is mainly used to clean “critical” air cooled heat exchangers and allows these facilities to recover close to design values running characteristics.
This cleaning method has safety benefits. Nobody has to enter the plenum chamber anymore. That means no risk of accidents due to heat stress or running fans. On top of that, this method does not make use of a high pressure application. And there is no treatment of liquid waste required.
Besides the safety benefits, there is the big advantage that the cleaning can be done during operation, meaning no production losses.
Results of dry online cleaning
Our team of cleaning specialists are fully trained to carry out performance measurements (airflow & ΔP airside) before and after cleaning. Therefore we are always able to show and demonstrate the superiority of our cleaning method versus conventional or similar cleaning methods. A full cleaning report will always be submitted to end-user after cleaning complete with reception documents.
In the image below you see the results before and after the dry-line.