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Enclosed Ground Flare Components
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Enclosed Stack - Combustion Chamber
MRW enclosed flare systems use a vertical, cylindrical, and self-supported refractory lined stack. The flame is completely hidden inside the combustion chamber. The refractory used is designed for cold start-ups. The refractory is designed to withstand shrinkage from exposure to high temperatures. Destruction efficiencies of up to 99%+ are achieved by using an enclosed flare. The stack includes lifting lugs for easy in field installation. MRW uses a special type of refractory attachment system designed for exposure to extremely high temperatures and is resistant against corrosion. For waste streams that are in the explosive limits, the enclosed stack includes an MRW Anti-Flashback burner assembly to allow for safe operation and stable combustion at high and low vapor rates. For situations where strict NOx requirements exist, MRW uses a proprietary staged combustion burner and injection design. The temperature is controlled via quench-air dampers that monitor the amount of air into the combustion chamber. Thus, fuel usage is controlled by maintaining a set point temperature usually of 1600F to 1800F depending upon plant needs, type of facility, and environmental requirements. |
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Pilot and Burner
MRW manufactures continuous and energy efficient pilots designed for reliable flame stability during any operating condition including the harshest weather and extremely high wind speeds. Our pilot burners are fabricated out of 309/310 stainless adding extended life to the pilot burner assembly. The spark ignition rod is strategically placed in the tip for rapid ignition of pilot fuel gas. This design is based on experience from experience with over 1,000 flare installations. An air/fuel gas mixer is attached to the pilot burner assembly to allow for a combustible mixture at the pilot burner tip. No field welding is required as mounting brackets allow for easy field installation. The MRW local control panel powers the ignition transformer for automatic ignition of the pilot. The enclosed stack includes an MRW Anti-Flashback burner assembly or MRW staged combustion burner to allow for safe operation and stable combustion at high and low vapor rates. MRW anti-flashback burners work to distinguish a flashback the same way a detonation/flame arrestor does by absorbing the heat of the flame into an element especially designed for distinguishing flame propagations. MRW pilots and ignitions systems are proven to be reliable, fast, and easy to operate and maintain. Our pilots are designed for continuous and intermittent use in adverse weather conditions and extreme wind speeds. MRW pilots increase the reliability and performance of the flare system by providing flame stability in any operating conditions. MRW designs extremely energy efficient pilots using as little as 50SCFH of fuel gas. Our local control panel powers the ignition transformers and automatically ignites/re-ignites the pilots. |
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Detonation Arrestor or Liquid Seal (Optional)
If waste gas fumes contain oxygen, are in the explosive range, and/or there are extended pipe runs or multiple bends in pipe, a detonation arrestor may be used to prevent flashback upstream of the flare system. This is an important flashback prevention device but it should never be the only line of defense to mitigate a flashback. MRW uses detonation arrestors approved by the US Coast Guard. In some situations, a liquid seal with a fluid barrier can be used in lieu of a detonation arrestor to keep air from penetrating the flare header. |
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Control / Ignition System
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Knockout Drum (Optional)
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Other Optional Equipment
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