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CECO Filters has been providing Fiber Bed Filters to the Nitric Acid Industry
worldwide for more than twenty years.
Nitric acid is produced by the reaction of oxygen (provided by atmospheric air)
and ammonia to produce nitrous gas that is then absorbed in water. The reaction
takes place over a catalyst that is composed primarily of platinum.
CECO Filters' fiber bed filters are utilized to remove impurities from the
compressed process air and from the vaporized ammonia that might damage the
platinum catalyst The filters can be removed during scheduled plant outages,
washed, and returned to service to yield many years of filter media life.
Over the course of a production campaign, platinum is lost from the catalyst and
carried downstream by the nitrous gas. CECO Filters' offers two styles of filter
to capture the precious metal for recovery by refining, thereby improving annual
cash flow of the plant. CECO Filters' conventional blanket wrap fiber bed filter
is an economical means of recovering the platinum. Our Pleated Filter offers the
same or better recovery efficiency while providing significantly more filter
surface area and the ability to run longer production campaigns. Our filter
designs allow plant maintenance crew to remove and replace the filter media
easily on-site providing savings in shipping costs.
During the absorption of the nitrous gas in water to yield product acid, inert
nitrogen exits the top of the absorber column often carrying nitric acid mist.
If not removed, the acid mist can cause corrosion in downstream equipment. CECO
Filters' fiber bed diffusion filters protect the downstream equipment by removing
100% of acid mist particles larger than 3 microns and 99.5% of acid mist particles
smaller than 3 micron. Acid collected by the filters can be recovered by routing
it to the product storage tank. Filters in this service can provide many years of
life before replacement of the filter media is required.
Whether you are building a new plant, modifying an existing operation, or simply
replacing filter media,
call CECO Filters today.
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