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TECHNOLOGIES

Catalytic filtration

in the cement industry

A widely accepted and preferred

solution for the control of stack
emissions

Graziano Bertulessi, Process and Project
Engineering Manager
Tri-Mer Global Technologies
Martin Schroeter, Product Manager,
Dry and Ceramic Products
Tri-Mer Corporation

eramic filtration, both catalytic
(UCF)and non-catalytic (UTF), is Ceramic Filter System with downstream Waste Heat Recovery, Central Germany
now a widely accepted and pre-
ferred solution for the control of efficiency of PM removal of a fabric filter, with the
stack emissions. The technology energy efficiency of an electrostatic precipitator
C initially built-up extensive refer- (ESP). Further, when additionally requiring high lev-
ences throughout the glass industry, and has els of NOx reduction, decades of experience in the
proven versatility in meeting a variety of technical coal fired power industry had proven the longevity
and regulatory drivers. Ceramic Filter technolo- of Selective Catalytic Reduction (SCR) technolo-
gies are often considered Best Available Control gy catalyst life in a so-called tail end arrangement
Technology (BAT / BACT / BARCT / RACT) in downstream of a fabric filter. The major disadvan-
certain industries across North America, Europe tage when combining a Baghouse with an SCR,
and Asia. is different flue gas temperature required by both
Today, the ceramic filtration technology can look technologies. While most baghouses have a max
back on increasing acceptance throughout a temperature of 200-240°C (400-450 F), it is a ne-
o
variety of industries, which are all connected by cessity to reheat the flue gas post Baghouse to
similar circumstances. Ceramic Filters are now desired operation temperature of the catalyst as
a proven alternative to traditional technologies shown in Fig. 1, which is a major disadvantage es-
such as Baghouse, ESP and SCR when requir- pecially in times of increasing efforts to limit CO
2
ing high levels of NOx, SO and/or PM reduction emissions.
2
at high temperatures, and are becoming increas-
ingly and cost-effective due to its high perfor- Ceramic Filtration technology negates the need
mance and lower operating costs when consid- for costly reheating requirements, with the tech-
ered across the lifetime of the system. nology able to operate at temperatures up to
900°C (1,600°F). This has great advantages also
The technology in combination with Waste Heat Recovery sys-
tems: when installed downstream ceramic filters,
Ceramic filtration technology originated from the heat exchangers for WHR have higher efficiency
desire to create a system that combines the high and lower operating costs.

Impiantistica Italiana - Marzo-Aprile 2022 69