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
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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VOC Abatement - VOC Control - Reduce Operational VOC Costs
operating costs on developmental equipment and operational plant systems. Air pollution Control can either
recover, remove or destroy hydrocarbons. Should the solvents be reusable a converting process, recovery
systems are preferred as a way to minimize are many times used to heat a plant process and are
eventually destroyed by an oxidation process.

Air Pollution Control Manufacturer's are coming to terms on developing new methods to reduce equipment
operating costs on developmental equipment and operational plant systems. Air pollution Control can either
recover, remove or destroy hydrocarbons. Should the solvents be reusable a converting process, recovery
systems are preferred as a way to minimize are many times used to heat a plant process and are
eventually destroyed by an oxidation process.

Granulated Activated Carbon Biological Oxidation Systems

The Granulated Activated Carbon Biological Oxidation System is a treatment method used to capture waste
off-gases by the combination of scrubbing and granulated activated carbon capture then to biologically
oxidize and degrade the pollutant compounds.

The trapped emission compounds such as HAP's, VOC's, BTEX, Solvents are then converted by the
bacteria to innocuous compounds such as carbon dioxide and water by the use of these specialized
bacteria. Emission destruction rates are comparative to thermal oxidation providing above 98% and the
system may be designed for over 99% DRE if required. The destruction or oxidation rate complies with  
using Method 25A VOC Concentration Determination for EPA requirements. Most facilities qualify for use of
the newer system, should your emissions be determined as a viable candidate of the system it is the least
costly to operate and offers reduced maintenance and extended equipment life when compared to other
pollution control oxidation technologies.

Thermal Oxidation

Regenerative thermal oxidizer (RTO) and Regenerative Catalytic Oxidizers (RCO) are the most common
oxidation technology and is used very often within the United States, and has gained acceptance worldwide.
The main benefit comes from the high thermal efficiency, creating an attractive method for low
concentration processes with high volumes of waste. VOC abatement is accomplished by elevating the
process stream to a temperature at which the hydrocarbons suddenly react with combustion and process
oxygen (usually between 400–1600ºF). Regenerative oxidizers utilizes the heat recover chambers (ceramic
media) to pick up and reuse the BTU value created by the oxidation process. After the heat has been
captured within the ceramic media bed it is used to preheating the incoming process air.

to as heat recover chambers or heat recovery chambers (HRC). One heat recovery chamber absorbs and
stores heat from the leaving purified hot process stream and the other heat recovery chamber applies the
stored BTU energy or heat to the incoming plant process waste gas stream. When the heat recovery
chamber acquiring the BTU’s or heat begins to become infused, the emitting heat recovery chamber
becomes exhausted, to cause the transfer of BTU’s or a when heat starts to overheat a group of valves the
process airflow changes to effect the transfer from one heat recovery chamber to the other, then reversed
on an time or temperature basis.

RTO systems and RCO system's have proven technologies; plants are continually demanding that air
pollution control systems become more efficient to reduce operating costs. Over the past years research
departments has developed a new heat transferring media, distinctive oxidation technology and fuel
optimizing principals.

Heat recovery beds are made up of high temperature of ceramic saddles which is also known as random
packing’s which are placed inside an insulated heat chamber bed. The process flows through the saddles
and is forced to take many directional changes. With the disorderly nature of the airflow and the drop in
pressure elevates with the square of the
process flow.
The structured packing is made up of a ceramic monolithic block and or ceramic saddles. The RCO system media blocks or ceramic balls are washed with a catalyst. The structured block approximates 6” to
12” inches high, 6” inches long and 6” inches wide, and has between 16 and 64 parallel passages per square inch, running from top to bottom. The structured media block’s characteristics allow for a
greater process flow velocity through the heat recovery chamber with a Greater bed velocity over random packings gives an answer to plants that have existing regenerative thermal oxidizer equipment,
which may require additional process stream abatement capacity. Older heat recovery chambers that have existing saddle configurations require much larger motors due to the increase in pressure drop,
which drives the utility consumption higher. Replacement of an ceramic saddle heat recovery bed with more efficient ceramic monolith can purportedly not only reduce the pressure drop across the heat
recovery chamber for existing capacity, but provides almost a 40% increase in process stream flow capacities with the existing motor and fan assemblies provided the combustion chamber can
accommodate the required exposure time.

The Burners Go Off

On standard regenerative thermal oxidizers, a fuel burner provides the elevate heat required for destruction. This heat is the difference that is not trapped within the heat recovery beds and combustion
chamber that is lost. This amount is around 5 to 10%. However, if the process stream has high enough VOC levels the hydrocarbons will provide enough energy for auto thermal conditions and be self-
sustaining. Under these conditions, no burner would be required. Once the heat exchange media is saturated and hot enough to elevate the air stream above self-ignition levels,
the burner is turned off
and combustion blower runs at a minimum position. Incoming VOC's are monitored and make-up air is added if the system becomes overheated reducing the concentration level. No burner is active during
the higher VOC state. Should the VOC's be reduced below sustainable or auto thermal conditions the burners will again ignite adding additional BTU's as needed. Auto thermal conditions improves the
thermal efficiency of an regenerative thermal oxidizer by decreasing the need for large amounts of combustion air being produced, which mitigates any imbalance in process flow between the heat recovery
beds. Burners are the largest contributor to the formation of NOx and CO formation by running the system at or closer to the auto-thermal state an improvement in NOx emissions will occur by reducing high
flame temperatures. We use new low NOx burners or natural gas injection if required to reduce much of these emissions. By reducing or shutting off the burner a sharp decrease in NOx formation will occur.

The Right Solution

It is important to understand and examine the plant process stream and the waste constitutes. In applying the correct technology, investigate both the waste stream and process to be abated. Carefully
review current and any future regulations, then consider local regulations, space, utility costs to select the correct plant solution.
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Our working process
in 3 steps





planing & strategy





test & deliver





design & develop
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.
before it leaves the plant. It is our way of
knowing that you are receiving correctly
designed equipment to meet your specific
needs.