Chilled water system flushing and dosing project recently completed at a factory in London.
Our customer had been experiencing various filter blockages throughout their system which subsequently caused it to underperform significantly.
It was critical that our customer utilised a sustainable solution to rectify the issue as soon as possible to avoid complete failure.
Chilled Water System Flushing Process
Prior to our arrival to site our customer initially disconnected all tooling machines, and installed flushing loops in the vicinity of their workshops mechanical machines.
The chiller was then disconnected and a temporary circulation pump was installed.
Once adequate circulation was achieved, the first system flush was carried out, we ensured the system was continuously checked throughout the process to ensure good water flow was consistently achieved.
Biocide was then added to chemically clean the pipe work, which was finally followed by dosing the system with inhibitor.
The chemicals were left in the system ensuring they achieved the required contact time.
Once complete we were in a position to carry out the second system flush which was required to flush out the biofilm and chemicals into IBCs (Intermediate Bulk Containers)
The system was batched to maximise flow throughout the process ensuring no blockages occurred and all debris had been completely flushed out of the system.
The chillers each had a storage of approximately 250L where we found a lot of slime and debris had built up over time.
To solve this issue we cleaned and disinfected the tanks to remove all bacterial activity.
System Dosing Of Inhibited MEG Glycol
Upon completion of the chilled water system flushing and dosing works, 300L of inhibited MEG glycol and a controlled dose of inhibitor was dosed into the system and circulated thoroughly throughout the system.
While on site we also discovered a mains bypass which had been left completely open, this would have continuously restricted the flow from the machines.
The bypass was isolated and the valves completely removed to ensure this issue wouldn’t occur again.
Installation Of Automatic Dosing System
The final part of the project involved installing a 200L dosing tank and bund.
This was set up to automatically dose the system with pre-dosed inhibited, biocide dosed MEG glycol.
The automatic dosing system installation was completed and commissioned prior to handing over to our customer upon completion.
Should you require help with chilled water system flushing or pre commission cleaning works please don’t hesitate to contact our team.