Emission Control
American Environmental
Fabrication & Supply, LLC


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Natural Gas Conditioning
Gas Separation Systems
VOC Biofiltration Systems
Granulated Carbon Systems
VOC Concentrators
Automated PLC Controls
Equipment Inspections - Installation - Rebuilds
Low NOx Burners
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Benefits of Renting vs. Owning Air Pollution Control Equipment
We have a ready to use air pollution control fleet or can design a specialized system for your plant operations. Some of the available systems include:
Granulated Activated Carbon (GAC) Systems, Biological Oxidation Systems, Wet Scrubbers, Regenerative, Catalytic and Direct Fired
Thermal Oxidizers
. Rentals range from 6 months to 5 years with flexible options.
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Treatment Information
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Optimum Regenerative Thermal Oxidizer (RTO) Operation
RTO Understanding
temperature needed to before exiting through the exhaust media, where the heat energy from the inlet
heat recovery and the combustion chamber is transferred to the outlet ceramic heat exchange media.

Lastly, the cleaned process stream leaves the RTO system through outlet exhaust valves to the exhaust
stack. The process reversal allows the RTO to recover up to 95 percent of the BTU value generated in
the combustion chamber which greatly minimizes supplemental fuel. A correctly designed and
engineered RTO unit can operate continuous without downtime for significant amounts of time without  
any maintenance issues.

Process Stream
A valuable tool is to understand the importance of process stream, this will define the RTO operation.
Most all process streams have some particulate matter in an emissions stream. The quantity may be
insignificant, but it is generally present. The VOC concentration in the process stream generally varies,
but during any major process upset condition a well designed system will allow the necessary operating
flexibility in the design, Some systems may cause the injection of dilution air or a hot air by pass system
to make unanticipated adjustments during operation.

Particulate matter in the process stream is another matter. Particles in the gas stream are the biggest
threat to efficient RTO operation. This particulate matter can lead to bed plugging and/or media
degradation and account for a large amount of RTO beds fires. Among all of the plant processes, starch
facilities, water treatment facilities, rendering, biomass dryers and coffee roasters are particularly prone
to such problems because of the amount of particulate matter in their processes.

Particle Sources and Effects
Coarse particles are particles greater than five microns. Their root is completely mechanical and come
from such as actions as tumbling or pneumatic action. Characteristically particles of this origin impact or
plug the cold face surface of the heat recovery ceramic media bed. If left unabated, this can also
become a fire safety hazard. Fine particles have a diameter less than one micron. Which are exclusively
caused by the thermal processes. Particles are formed when the process stream vapor cools and then
condenses. The particle may be solid or liquid in nature depending on its chemical particles are derived
from the evaporation of organic material and the cooling within the ceramic bed prior to the exhaust
valves. Particles in the process stream which are considered fine and which are considered chemically
reactive also cause ceramic media plugging. These fine particles also tend to react with the heat
exchange media. Examples of chemically active fine particles are the oxides of sodium and potassium.
These react with the ceramic media at elevated temperatures and cause the media to become
brittle with breaking and bed plugging. Fine particles which are liquid usually evaporate as they move
through the ceramic media bed and enter the combustion chamber as vapor where they are destroyed.

Solutions to Particulate Matter
When your process stream has significant amounts of particulate matter, differentiate the size and the
amounts of particulate matter. After this is completed it is an easy process to select the right ceramic
media for the application, usually these costs are insignificant. Larger amounts may require a wet
scrubber, fabric filtration or electrostatic precipitation system or bag house prior to RTO process
entrance. Large amounts of fine water molecules in the process stream may require preheating prior to
entering the RTO. This allows the condensate to enter the RTO as a vapor. Periodically baking out the
RTO allows any condensate located in the bottom of the ceramic media bed to vaporize and burn
through the RTO system.  Identifying your particulate is the first step in insuring long term RTO trouble
free operation. After the particulate is characterized and quantified, then develop a upstream cleaning
approach that provides the appropriate level of process stream cleanliness.
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Our working process
in 3 steps





planing & strategy





test & deliver





design & develop
Our Corporate goal is to implement the
correct design criteria with the use of
proper metals, instruments and controls to
achieve the required result with the least
amount of maintenance and associated
energy costs.
Implement proven equipment designs with
chemical, thermal and biological reactions
that achieves the required process result.
Results shall be based on reaction rates
and proper control logic.
We pride ourselves in going the extra mile
before it leaves the plant. It is our way of
knowing that you are receiving correctly
designed equipment to meet your specific
needs.