As instructed by Kabrute here, I report this a bug. Not sure if exploit or not.
As you may see in attached screenshot, the refinery is filled with 17.2tons of 853°C of polluted water.
It happened after I set a loop of polluted water from outside the Refinery, dropping in a tank, then reinjected without cooling into the refinery.
As the Refinery is made of abyssalite, I did not noticed it was having a such a hot content.
I realized it when i tried to relocate it and destroyed it. Steam realeased smelt everything in the vicinity.
The ouput pipe that is no more in the attached save file was a regular pipe of abyssalite, that broke when the output polluted water was hot enough to turn into steam.
I think that's when the polluted water started to grow and heat inside, since I'm pretty sure it keeped on working until I destroyed it, even though the output pipe was broken.
attached save file : Spacejunk.sav
The refinery can be found south east of printing pod.
Thanks for your support and this game ! It is so cool ! -unlike my refinery -_-'
Built a refinery and reinject hot polluted water into into untill output turns to steam and breaks pipe. Then, it should be possible to keep on producing with the refinery, but the hot polluted water will not be ouput and starts to heat and build inside the rerfinery.