We predilute our concentrated sulfuric to 5% in a pH control application, and it works fine. We are using a PTFE lined steel pipe spool static mixer with glass filled PTFE static mixing elements. The concentrated acid is injected using a PTFE lined instrument tee. No quill is needed, as this...
There are non-clog static mixers that will pass debris up to 25% the diameter of the pipe. They are used for sludge/polymer mixing. I know that Komax Systems makes one called a Hi-Pass. It was successful on our dewatering application.
