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Sometimes referred to as an After-Burner, the direct fired thermal oxidizer uses a specially designed burner to raise the temperature of a pollutant laden air stream to a predetermined combustion temperature. In operation, the contaminated process exhaust is ducted into a burner chamber. Heat applied by the burner oxidizes the VOCs and HAPs creating harmless products of combustion (water and carbon dioxide). The clean, heated exhaust gas can then be discharged to the atmosphere or sent through an optional heat recovery system.
The Anguil DFTO can achieve over 99% hydrocarbon destruction rate efficiency. To achieve this, the heated air is kept in the combustion chamber for a specified amount of time, called the residence or dwell time. At the inlet to the combustion chamber turbulence is generated to mix the pollutants and oxygen molecules. Proper mixing of the combustion air and process streams not only provides high destruction efficiencies but also safe operation. The Anguil design minimizes the risk of explosion and takes complete advantage of the VOC laden exhaust stream to minimize auxiliary fuel needs. An optional burner system is available to burn inert process streams directly in the burner as fuel.
Anguil Advantage:
-Modular design for system flexibility and future expansion
-Pre-assembly and factory testing reduces installation costs
-PLC based controls guarantee proper system performance
-High destruction efficiencies for regulation compliance
-Safety shutdowns ensures safe operation
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The Anguil Catalytic Oxidizer destroys toxic Volatile Organic Compounds (VOCs) that are discharged in industrial process exhausts. The catalytic reactor achieves destruction of the organics by the process of oxidation. The catalyst oxidizes the hydrocarbons to carbon dioxide and water vapor at significantly lower temperatures than thermal oxidizers.
How the Catalytic Oxidizer Works:
The Catalytic Oxidizer is designed based on volume of airflow, organic vapor concentrations and desired destruction efficiency. During operation, VOC-laden air is drawn into the system fan and is discharged into the system's heat exchanger. The air is preheated through the tube side of the heat exchanger and then passes the burner, where the contaminated air is raised to the operating temperature. As the VOC-laden air passes through the catalyst, an exothermic (heat releasing) reaction takes place. The VOCs in the air stream are converted to carbon dioxide and water vapor. The hot, purified air then passes on the shell side of the heat exchanger where the energy released by the reaction is used to preheat the incoming air. The heat exchanger minimizes the system's fuel consumption with the system being self-sustaining at low LEL levels. Finally, the contaminant-free air is exhausted into the atmosphere.
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The Anguil Thermal Oxidizer achieves destruction of the organics by the process of combustion. All hydrocarbons are oxidized to carbon dioxide and water vapor, due to the proper mix of temperature, residence time and turbulence within the reactor chamber.
How the Anguil Thermal Recuperative Oxidizer Works
The Thermal Oxidizer is designed based on volume of airflow, organic vapor concentrations and desired destruction efficiency. During operation, VOC-laden air is drawn into the system fan and is discharged into the system's heat exchanger. The air is preheated through the tube side of the heat exchanger and then passes the burner, where the contaminated air is raised to the thermal oxidation temperature (1,200-1,800ºF or 650-1,000ºC). When the VOC-laden air is raised to the thermal oxidation temperature for the specified residence time (0.5 - 2.0 seconds), an exothermic reaction takes place. The VOCs in the air stream are converted to carbon dioxide and water vapor. The hot, purified air then passes on the shell side of the heat exchanger where the energy released by the reaction is used to preheat the incoming air. The heat exchanger minimizes the system's fuel consumption with the system being self-sustaining at moderate LEL levels. Finally, the contaminant-free air is exhausted into the atmosphere.
Anguil strives to provide innovative pollution control technology including process analysis, engineering, equipment manufacturing, installation and post-sale 24-hour service
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The Anguil Regenerative Thermal Oxidizer destroys Hazardous Air Pollutants (HAPs), Volatile Organic Compounds (VOCs) and odorous emissions. The RTO achieves emission destruction through the process of high temperature thermal or catalytic oxidation, converting the pollutants to carbon dioxide and water vapor while reusing the thermal energy generated to reduce operating costs.
VOC and HAP laden process gas enters the oxidizer through an inlet manifold to flow control, poppet valves that direct this gas into energy recovery chambers where it is preheated. The process gas and contaminants are progressively heated in the ceramic media beds as they move toward the combustion chamber.
Once oxidized in the combustion chamber, the hot purified air releases thermal energy as it passes through the media bed in the outlet flow direction. The outlet bed is heated and the gas is cooled so that the outlet gas temperature is only slightly higher than the process inlet temperature. Poppet valves alternate the airflow direction into the media beds to maximize energy recovery within the oxidizer. The high energy recovery within these oxidizers reduces the auxiliary fuel requirement and saves operating cost. The Anguil oxidizer achieves high destruction efficiency and self-sustaining operation with no auxiliary fuel usage at low concentrations.
The Anguil RTO Advantage:
*99%+ Destruction Rate Efficiency
*System flexibility addresses a wide range of process conditions
*Customized ceramic media with true thermal energy recovery up to 97%
*Zero leakage, dual-disk Poppet valves
*Low pressure drop reduces electrical consumption
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The Cost Effective Solution for High Volume, Low Concentration Process Streams
The Anguil Rotor Concentrator/Oxidizer is designed to adsorb Volatile Organic Compounds (VOCs) from a high volume, low concentration airstream and to oxidize the VOCs in a reduced volume, high concentration process stream.
The high volume airstream is passed through a rotor concentrator wheel where the VOCs are adsorbed in the bed, purifying the high volume air. This high volume air is then exhausted to atmosphere. The concentrator wheel rotates continuously, transporting adsorbed VOCs into a desorption section. In the desorption section, the adsorbed organics are desorbed from the adsorptive media with a low volume heated airstream. This low volume, high VOC-laden air is then processed by an oxidizer. The operational cost of the oxidizer is substantially reduced via this concentration process.
The Rotor Concentrator/Oxidizer is often the most cost effective technology for processing high volume, low VOC concentration streams. While the capital cost of a system is competitive with other technologies, the true savings is realized in reduced operating costs. The chart below illustrates the fuel cost savings achievable with an Anguil Concentrator/Oxidizer system.
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Anguil's Chlorinated Oxidizers destroy halogenated organic acids and mixed organic vapor contaminants that are discharged from a variety of industrial process streams.
How the Chlorinated Oxidizer Works
The Chlorinated model is selected based on volume of airflow, contaminant type and desired destruction efficiency. Similar to a standard thermal or catalytic oxidizer, destruction of VOC-laden air is achieved through high temperature combustion with heat recovery to reduce operating costs by preheating incoming contaminants. When halogenated hydrocarbons such as chlorine, bromine and fluorine are present in the process gas, Anguil makes special considerations to design an emission control system that will not only protect against corrosion but also scrub the acids produced during oxidation.
Design Considerations:
*Temperature and residence times are increased to ensure halogen destruction efficiency
*Induced draft fan design is used to eliminate acid gas escape
*Critical components are upgraded to higher alloys to withstand the corrosive emissions
*External shrouds are added or vinyl ester coatings applied to prevent acid corrosion of the external shell
*When special coatings are applied they are subject to pre and post application inspections by a third party
*Acid Gas Scrubbers are incorporated into the system for further treatment of acidic emissions
*FRP (Fiberglass Reinforced Plastics) fan and ductwork are used when necessary
Available Options:
*Thermal, Catalytic or Direct-Fired oxidizers for chlorinated emission control
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How the Regenerative Catalytic Oxidizer Works
Process gas with VOC contaminants enters the Twin Bed RCO through an inlet manifold. A flow control valve directs this gas into an energy recovery chamber which preheats the process stream. The process gas and contaminants are progressively heated in the stoneware bed as they move toward the catalyst bed.
The VOCs are then oxidized across the catalyst, releasing energy in the second stoneware bed, thereby reducing any auxiliary fuel requirement. The stoneware bed is heated and the gas is cooled so that the outlet gas temperature is only slightly higher than the inlet temperature.The flow control valve switches and alternates the stoneware beds so each is in inlet and outlet mode. If the process gas contains enough VOCs, the energy released from their combustion allows self-sustained operation. For example, at 95% thermal energy recovery, the outlet temperature may be only 77° (25°) higher than the inlet process gas temperature.
PLC-based electronics automatically control all aspects of the RCO operation from start-up to shutdown so that minimal operator interface is required.
Anguil's Cost Effective Design
The Regenerative Catalytic Oxidizer is designed as part of Anguil's broad line of technologically advanced, yet user-friendly, air pollution control products. All systems are designed for optimum performance and trouble-free operation.
Anguil strives to provide innovative pollution control technology including process analysis, engineering, equipment manufacturing, installation and post-sale 24-hour service.
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Flow Rate: 5,000 10,000 15,000 20,000 DATA
Inlet Temp: 70 70 70 70 F
Outlet Temp: 1400 1400 1400 1400 F
Max Burner Input: 10.0 20.0 30.0 40.0 MM Btu
Gas Press: 0.5 0.5 0.5 0.5 PSI
Refractory Lining: 6 6 6 6 In
Chamber Size: 300 600 900 1,200 Cu.ft.
Residence Time: 1 1 1 1 Second
Destruction Eff.: 99 99 99 99 %
SHELL DIM. (OD)
72 84 96 96 DIA.
180 264 300 420 Length
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Hitemp technology exclusive design features:
All 0.25" steel plate design, not thin sheet metal.
Easy access to all major components for repair and inspection
Both horizontal and vertical orientations available
Two-pass design for maximum turbulence and residence time
All 2200 f ceramic fiber insulation (not oven insulation)
70% efficient heat exchangers (by Exothermics Eclipse and Des Champs Labs)
PLC controls will interface with plant systems
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CATALYTIC OXIDIZER
The reaction of thermal oxidation of organic substances is carried out using high-performance platinum and palladium catalysts.
The types are:
• In pellets and honeycomb for S. O. V. and CO emissions abatement in recuperative plants.
• In saddles for catalytic oxidation plants with regenerative thermal recovery.
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Flow Rate : 1000 1500 2000 3000 4000 5000 8000 10K 15K 20K SCFM
Inlet Temp: 70 70 70 70 70 70 70 70 70 70 F
Stack Outlet Temp: 270 270 270 270 270 270 270 270 270 270 F
Catalyst Inlet Temp: 550 550 550 550 550 550 550 550 550 550 F
Catalyst (95%): 1 1.5 2 3 4 5 8 10 15 20 Cu. ft.
Catalyst (98%): 2 3 4 6 8 10 16 20 30 40 Cu. ft.
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TYPICAL HTT GAS/ELECTRIC CATOX SYSTEM
HTT shall supply one Fume Incineration System. The system shall use a gas burner or electric heaters to raise the temperature of the exhaust gases to the required operating temperature. This will assure maximum destruction of the VOC in the exhaust gas. The system shall be packaged complete with an integral preheat exchanger, Inconel sheath low watt density heating elements or gas burner, precious metal ceramic type catalyst module, refractory lined processing chamber, and the field installed stack.
CATOX SYSTEM CHAMBER
The Catox System shall be constructed of 304 stainless steel (Note: We use 316 L for HCl solvent applications) and insulated with a combination of Ceramic Fiber and high temperature insulating materials. The refractory shall be installed with SS anchors to maintain integrity. The lower chamber shall be constructed of carbon steel and coated with an acid resistant epoxy coating.
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NOx control systems (DeNOx)
Lowering NOx levels with selective catalytic reduction
Modern power plants reduce emissions to a minimum. For instance, the SCR is deployed following combustion to minimize nitrogen oxide emissions. This modern process produces nitrogen and water vapor; the nitrogen oxides are practically 100% removed.
The SCR technology is used preferably between economizer and air heater since it is here that it can best be operationally incorporated into the overall power plant picture.
HPE provides this DeNOx technology with the delivery of utility steam generators for firing coal.
The main units of a DeNOx plant are:
Ammonia /ammonium hydroxide storage and supply
Ammonia /ammonium hydroxide injection and blender systems
DeNOx reactor with rectifier and sootblower
Catalysts
HPE supplies this units as part of a turn-key installation.
The heart of the process is the catalyst. Plate or honeycomb catalysts are available for deployment in DeNOx systems. All the catalysts on the market can be used in our systems.
Special importance for proper and optimum catalyst operation is attached to ammonia and/or ammonium hydroxide injection and the blender system. The ideal requirements here are created by the static blender system used by HPE with a form of ammonia injection adapted to this blender system.
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RECUPERATIVE THERMAL OXIDIZER
The recuperative facilities provide for installation of one/ heat exchanger that heats the air entering in the fascility thrugh the coming out smokes.
The efficiency of the thermical recover can reach the 65%.
The possible still usefull energy can be recovered during the production for services.
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Flow Rate : 1000 1500 2000 3000 4000 5000 SCFM
Inlet Temp: 70 70 70 70 70 70 F
Stack Outlet Temp: 550+ 550+ 550+ 550+ 550+ 550+ F
Catalyst Inlet Temp: 550 550 550 550 550 550 F
Catalyst (95%): 1 1.5 2 3 4 5 Cu.ft.
Catalyst (98%): 2 3 4 6 8 10 Cu.ft.
Destruction Eff.: 95 95 95 95 95 95 % Catalytic
Destruction Eff.: 98 98 98 98 98 98 % Catalytic
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Catalytic materials enhance the chemical reactions that convert VOCs into carbon dioxide and water. A catalyst does not take part in the reaction, but lowers the temperature required to destroy pollutants. The result is lower operating costs and reduced equipment stress.
MEGTEC offers flexible designs and field-tested, proprietary catalyst formulations. Our experience in a wide variety of industries and firsthand process knowledge enable us to build catalytic oxidizers that offer reliability, effectiveness and low operating costs.
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REGENERATIVE THERMAL OXIDIZER
They exploit the capacity of a mass of inert material (porcelain, corderite) of cyclically accumulating and give back heat. The efficacy of the thermal recovery can reach 96%, thus drastically reducing the plant managing costs.
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REGENERATIVE THERMAL OXIDIZER FOR CHLORINATED S.O.V.
This is an application of the regenerative system for the removal of chlorinated organic substances typical of the chemical sector and of the chemical-pharmaceutical synthesis.
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Zeolite-based S.O.V. rotor concentrator system
Low/average concentrations of S.O.V. in high air flows are concentrated in a ZEOLITE-based adsorption system with continuative regeneration. The regeneration SOVs are then destined to the combustion in traditional systems or to the eventual recovery.
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Epcon is an industry leader in Industrial Afterburner technology and can build a custom unit for stand alone or trailer mounted applications. We also offer different purchase/lease/rental agreements to suit any need.
Afterburners are ideal solutions for high solvent loading and fluctuating operating conditions. Flame arrestors are always installed between the vapor source and the thermal oxidizer. Burner capacities in the combustion chamber range from 0.5 to 2 mmBtuH.
Operating temperatures range from 1,250 to 1,800°F, and gas residence times are typically 1 second or less. These conditions cause the process stream's molecular structure to break down into simple carbon dioxide and water vapor.
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Epcon designs systems to accept various selections of catalyst, and with our own internal catalyst expert can assure correct application of our systems to various process exhaust streams. Customers can count on Epcon to design air pollution control systems or any number of custom systems specific to your process.
Catalytic OxidizerEpcon Catalytic Oxidizers convert process exhaust stream Volatile Organic Compounds into harmless amounts of carbon dioxide, water, and thermal energy - which are then safely discharged to the atmosphere. This process is known as oxidation. Catalytic Oxidation occurs through a chemical reaction between the VOC hydrocarbon molecules and a precious-metal catalyst bed that is internal to the oxidizer system.
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Epcon is an industry leader in Thermal Oxidizer technology and can design a system to fully integrate a customer's heat Processing Equipment with a Recuperative Thermal Oxidizer. This provides tremendous costs savings with respect to minimizing the use of natural gas and mechanical sub assemblies.
Complete integration of an Epcon Thermal Oxidation System includes the following:
* Shell and Tube Heat Exchanger
* Temperature control system
* Oxidation Chamber
Epcon's line of Recuperative Thermal Oxidizers operate at 1400°F, with a residence time of 1 second and a heat recovery efficiency of up to 80%. Turbulent flow allows these systems to achieve such high destruction efficiency, up to 99.99% and high heat recovery as well. Higher operating temperatures are also achievable for hard to oxidize chlorinated compounds. Epcon also offers recuperative systems with catalytic modules suitable for VOC destruction.
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At Adwest Technologies, RETOX RTO Dual Chamber Regenerative Thermal Oxidizers are our focused business specialty and dedicated business. Adwest provides cost effective custom RTO Thermal Oxidizer air pollution control solutions from 1,000 scfm to 80,000 scfm with single shop assembled modules, witheach RTO having with the lowest RTO energy usage available, all at very competitive capital costs to provide your VOC abatement project with an affordable sollution to air pollution control.
Count on the team of Adwest Technologies' RETOX RTO specialists to help your firm achieve cost effective VOC abatement and compliance for your next retrofit or new process expansion. Remember, we provide exceptionally efficient RETOX RTO Oxidizers which are designed, built and service by our exceptional team of market proven RTO specialists. Our core technical, design, engineering, sales and service team average over 30 years of dedicated RTO Oxidizer experience. We feel that this market experience, combined with our sole focus on RETOX RTO systems provide our past, current and future clients with an exceptional advantage-the Adwest Advantage!
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At Adwest Technologies, RETOX RTO Dual Chamber Regenerative Thermal Oxidizers are our focused business specialty and dedicated business. Adwest provides cost effective custom RTO Thermal Oxidizer air pollution control solutions from 1,000 scfm to 80,000 scfm with single shop assembled modules, witheach RTO having with the lowest RTO energy usage available, all at very competitive capital costs to provide your VOC abatement project with an affordable sollution to air pollution control.
Count on the team of Adwest Technologies' RETOX RTO specialists to help your firm achieve cost effective VOC abatement and compliance for your next retrofit or new process expansion. Remember, we provide exceptionally efficient RETOX RTO Oxidizers which are designed, built and service by our exceptional team of market proven RTO specialists. Our core technical, design, engineering, sales and service team average over 30 years of dedicated RTO Oxidizer experience. We feel that this market experience, combined with our sole focus on RETOX RTO systems provide our past, current and future clients with an exceptional advantage-the Adwest Advantage!
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At Adwest Technologies, RETOX RTO Dual Chamber Regenerative Thermal Oxidizers are our focused business specialty and dedicated business. Adwest provides cost effective custom RTO Thermal Oxidizer air pollution control solutions from 1,000 scfm to 80,000 scfm with single shop assembled modules, witheach RTO having with the lowest RTO energy usage available, all at very competitive capital costs to provide your VOC abatement project with an affordable sollution to air pollution control.
Count on the team of Adwest Technologies' RETOX RTO specialists to help your firm achieve cost effective VOC abatement and compliance for your next retrofit or new process expansion. Remember, we provide exceptionally efficient RETOX RTO Oxidizers which are designed, built and service by our exceptional team of market proven RTO specialists. Our core technical, design, engineering, sales and service team average over 30 years of dedicated RTO Oxidizer experience. We feel that this market experience, combined with our sole focus on RETOX RTO systems provide our past, current and future clients with an exceptional advantage-the Adwest Advantage!
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For larger flow capacity processes the RETOX LFC (Large Flow Capacity) Design provides cost effective VOC Control from 60,000 scfm to 80,000 scfm with single shop assembled modules. For flowrates larger than 80,000 scfm we can provide multiple module systems with common stacks for up to 320,000 scfm and greater sized systems. Our RETOX LFC RTO Oxidizers are compact in size with a minimal footprint and have a low profile design like all RETOX RTOs for ease of access and maintenance from ground level.
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For larger flow capacity processes the RETOX LFC (Large Flow Capacity) Design provides cost effective VOC Control from 60,000 scfm to 80,000 scfm with single shop assembled modules. For flowrates larger than 80,000 scfm we can provide multiple module systems with common stacks for up to 320,000 scfm and greater sized systems. Our RETOX LFC RTO Oxidizers are compact in size with a minimal footprint and have a low profile design like all RETOX RTOs for ease of access and maintenance from ground level.
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Catalytic Thermal Oxidizers (CTO) and Regenerative Thermal Oxidizers (RTO) are efficient ways to thermally treat pollutants and volatile organic compounds (VOC). Single valve RTO technology developed by Eisenmann in the 1990’s offers 100% uptime with energy efficiency and guaranteed cleaning results.
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Epcon Regenerative Thermal Oxidizers are designed to be highly energy efficient systems that achieve high levels of VOC destruction to keep processes well below required DRE emission levels.
A Regenerative Thermal Oxidizer (RTO) System is based upon the principle of thermal oxidation, which utilizes the process of regeneration for internal heat recovery.
Epcon Regenerative Thermal Oxidizer systems have been successfully utilized on hundreds of industrial VOC air pollution control applications since 1978. Because no two applications are alike, we look forward to preparing a custom RTO proposal for your specific application.
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More and more, companies operating air pollution control equipment today realize that the initial capital cost of an oxidizer system can be rapidly eclipsed by continued operating expenses if careful attention is not periodically given to the system. Here are ten tips to ensure your oxidizer is operating at peak performance. The first five tips focus on parameters end-users should know about their oxidizer systems, while the last five address energy reduction projects to be considered.
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