Emission Control
American Environmental
Fabrication & Supply, LLC


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American Environmental Fabrication & Supply Logo
Natural Gas Conditioning
Gas Separation Systems
VOC Biofiltration Systems
Granulated Carbon Systems
VOC Concentrators
Automated PLC Controls
Equipment Inspections - Installation - Rebuilds
Low NOx Burners
PSA Systems
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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.
Products


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Treatment Information
Helpful Equipment Information
A: Thermal oxidation is used in the treatment of air pollution to control emissions such as Volatile Organic Compounds
can be very costly.

Q. Is there a way to treat the VOC process more economically?
A: Regenerative Thermal Oxidizers has greater fuel efficiency over thermal oxidizer. The regenerative thermal oxidizer has
two or more ceramic heat exchanger's connected by a combustion chamber. The heat recovery chambers consist of beds
filled with ceramic heat sink media that allows air to pass and heat while the other heat recovery chamber acts to store
heat. The media material selection, size, and shape can vary greatly and substantially impact the design and utility
efficiency of the regenerative thermal oxidizer.

The process air flow through the heat recovery chambers is reversed at regular intervals to retain the heat of combustion
within the regenerative thermal oxidizer.
Heat retention can be up to 95%. This heat is recovered and recycled representing
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substantial fuel savings over conventional thermal oxidization methods.

When comparing thermal and catalytic oxidation, regenerative thermal oxidizers have a advantage of  VOC application
flexibility and destruction without the risk of poisoning or fouling expensive precious metal catalyst used in catalytic
oxidizers.

Q: What is thermal efficiency?
A: Thermal Efficiency is the measure of heat recovery of an regenerative thermal oxidizer.
A: Heat exchange media is a ceramic material that is located at the inlet and exhaust of the heat recovery chamber and is
used to store heat energy.

Q: Difference between "refractory structured media" and "random packed" heat exchange media?
A: Random packed media is relatively small ceramic pieces of a many shapes such as saddles, rings, tubes cylinder with
holes, etc. Random packed ceramic material is inexpensive and very easy to install and handle. The disadvantage of
random packed material is one of high pressure drop this is due to turbulent flow and limited thermal
channeled cells. Structured media has a very laminar flow and therefore offers higher performance with respect to
pressure drop and thermal efficiency. Structured media is considerably more labor intensive to install having to cut the
individual blocks to fit into the heat recovery bed properly, refractory structured media does not require high
maintenance or the replenishment of random packed media.

Q: What is a "hot air by-pass system"?
A: A hot air by-pass system is duct with a valve that connects the combustion or upper area of the heat recovery chamber to
the exhaust stack. When BTU's from the process VOC's are higher than the heat losses, the regenerative thermal oxidizer
exhaust temperature will climb. If there is enough BTU's left, the exhaust temperature will climb to where the exhaust
valves could be damaged. A hot air by-pass is a means of diverting the excess BTU's to atmosphere to protect the
equipment and reduce a higher pressure drop.

Q: What is "auto-thermal" operation?
A: This describes a process condition when the BTU value of the VOC's being destroyed is equal to or greater than the
heat loss of the regenerative thermal oxidizer.
No supplemental fuel is required from the burner.

Q: What is a "VOC"?
A: VOC is an acronym for Volatile Organic Compound. Many solvents used in industrial processes are Volatile Organic
Compounds and are considered hazardous waste.

Q: What is a "VFD"?
A: VFD is an acronym for Variable Frequency Drive. This device controls the speed of an electric motor. Variable Frequency
Drives are used on many fans that convey process air.  The advantage of a variable frequency drive is reduced electric
consumption, Variable frequency drives are able to control the power needed to the electric motor which maybe
substantially less than the fans name plate and is easily fine tuned to the plants process flow.

Q: What is a "PLC"?
A: PLC is an acronym for Programmable Logic Controller. A device that controls the operation of the system.
Q: What is "telemetry"?
A: Telemetry is a means of remotely monitoring or making adjustments to the PLC. This is typically by means of a modem over a phone line. All are systems are designed to be Ethernet ready and will operate on any workstation or
computer. If you choose you can operate from any location with granted access.

Q: Can a regenerative thermal oxidizer treat halogenated compounds?
A: Yes, a regenerative thermal oxidizer can treat these compounds, however, the atoms broken up in the VOC compound chain and will  combine with water and exit the regenerative thermal oxidizer as acid. Regenerative thermal oxidizers
need to be constructed of acid resistant alloys, have higher thermal oxidation temperatures and need a downstream caustic scrubber to neutralize the acid.

Q: Can a regenerative thermal oxidizer operate in cold climates?
A: Yes, an regenerative thermal oxidizer can be equipped to withstand freezing ambient conditions. Electric control cabinets and junction boxes that are outdoors will need to be equipped with heaters, any instrument air will need to be free
of any moisture.
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Our working process
in 3 steps




planing & strategy





test & deliver





design & develop
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.
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.
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.