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Regenerative Thermal Oxidizers

 

A regenerative thermal oxidizer (RTO) is an air pollution control technology for industrial processes that decomposes Hazardous Air Pollutants (HAPs), Volatile Organic Compounds (VOCs), and odorous emissions at high temperatures and emits the purified air into the atmosphere. By optimally tuning the temperature, turbulence, residence time, and oxygen in a thermal oxidizer system, the pollutants are cost-efficiently transformed into cardon dioxide and water, which can be safely released into the atmosphere.

Combustion Controls Solutions & Environmental Services designs and builds state-of-the-art regenerative thermal oxidizers, the most widely used technology in industry for emission abatement. What makes a regenerative thermal oxidizer the favorite choice for air pollution control? A regenerative thermal oxidizer redistributes the generated thermal energy from the standard thermal oxidizing process, which enables a drastic reduction in the system's energy consimption as well as operating costs.


Applications


A pioneer and recognized leader in thermal and catalytic oxidation as well as heat recovery systems for air pollution control. CCS&ES develops, builds, and applies state-of-the art technology in the manufacturing and servicing of regenerative thermal oxidation systems. These systems are custom designed and engineered to meet the specific requirement of each VOC emissions control application.

 

CCS&ES regenerative oxidation systems are the ideal solution for VOC control applications in which heat recovery above 80% is required, since the process exhaust flows cannot be further reduced. Also, in many applications a catalytic oxidizer system is not suitable, because of the possibility of catalyst deactivation.

 

The regenerative systems are ideally suited to handle very low solvent concentrations with an upper bound of 550,000 SCFM on exhaust flows for the minimum attainable operating costs.

 

Operation

 

A regenerative heat exchange cycle is used to alternately heat and cool relatively shallow beds of a special ceramic media.

 

Heat Exchanger Selection CriteriaVOC-containing process exhausts enter the system passing vertically through a heated ceramic bed (heat exchanger) which preheats them to almost final oxidation temperature. These preheated exhausts then enter a combustion chamber where they are further heated and retained at final oxidation temperature to achieve high destruction efficiency. The hot clean gases exiting this chamber pass through a second ceramic bed cooled in an earlier cycle. This bed absorbs most of the heat from the gases, cooling them before discharge to the atmosphere. A third ceramic bed/heat exchanger vessel is simultaneously being purged of any exhaust still contaminated with inlet VOC emissions, in order to insure high overall VOC destruction efficiencies for the system. The cycle is repeated, alternating between the three ceramic beds for heating, cooling, and purging operation. The quantity and configuration of the ceramic bed media are varied to provide for thermal energy recovery efficiencies of up to 97%. Additional heat exchanger vessels can be used to handle very high exhaust flow rates.

 


CCS&ES regenerative systems offer all of these benefits:


• Multiple heat exchanger vessels, each containing inlet and outlet damper systems for flow control.
• Vertical flow in heat exchangers for efficient operation, low maintenance, and minimum pressure drop.
• Tandem operating valves for stabilizing air flow and minimizing flow surges.
• Shallow ceramic media beds which minimize attrition of the ceramic heat transfer media.
• Special long-life ceramic fiber refractory insulation in heat exchanger vessels and combustion chamber which extends service capability of ceramic media, minimized start-up time, and reduces equipment weight.
• Static pressure control system and variable frequency fan drive to handle variations in process flow conditions.
• Programmable logic control to allow for variation in thermal efficiency of the system to handle changing process conditions.
• Unique purge feature to remove VOC contaminants from the media beds, thus providing high overall destruction efficiencies.
• Incineration temperature of up to 2,000°F or more.
• Applicable to both single and multiple emission sources.
• Compact design and modular construction.
• Single source project responsibility including installation and system startup.

 


  • HIRT Combustion & Burners
  SCR Systems
  Regenerative Thermal Oxidizers
  Regenerative Catalytic Oxidizers
  Recuperative Thermal Oxidizers
  Direct Fired Oxidizers
  Furnaces
  Concentrators
  Gas Flares
  • Used TOX Equipment
  • Gas Pilot
  • Burner Igniter




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