Komax Teflon Lined Mixer Simplifies Acid Injection

Previously an expensive neutralization tank with a propeller mixer and a secondary “smoothing” tank with a propeller
mixer was needed to mix and dilute the viscous concentrated sulfuric acid used for this neutralization process.
These tanks covered 400 ft 2 of floor space and the mechanical mixers consumed 65,000 kw-hr annually.

Maintenance was estimated at $25,000 annually, as the high constantly fouled the pH probe, and the mechanical
mixers required continual maintenance, and the tanks required annual cleaning due to the sludge that would
build up in these tanks.

The neutralization tanks were replaced with a 3” Teflon lined in-line static mixer with optional injection port for direct
injection of  the sulfuric acid.
The pH probe was placed downstream of the mixer, providing immediate feedback to the sulfuric acid dosing pumps.

This in-line static mixer saves energy costs, maintenance labor, reduces space requirements, and has achieved
consistent control over the neutralization process

Previous Neutralization System

Static mixer Nutralization system