Ethylene Furnace Combustion Optimization

ZoloSCAN-ETH System: Benefits of Combustion Monitoring for Ethylene Cracking Furnaces

Ethylene_Furnace_Isometric

Multiple ZoloSCAN-ETH paths can be installed on several elevations to provide a combustion profile inside the cracking furnace

  • Balance in-furnace O2 profile
    • Minimize overall excess O2
    • Improve combustion efficiency
    • Reduce NOx and CO2 emissions
  • Balance in-furnace temperature profiles
    • Eliminate localized ‘hot spots” that accelerate coking
    • Increase run-times between de-coking
  • Improve safety through CO monitoring

Better Measurements, Better Results

The ethylene cracking process requires a very tight temperature control and uniformity for optimum performance and reliability. A typical ethylene cracking furnace has many sensors installed for monitoring and controlling the combustion and cracking processes. However, the number of sensors available for use directly inside the furnace is very limited. This lack of measurement data directly in the combustion area makes it very difficult to maintain the optimum temperatures and a uniform combustion profile. The ZoloSCAN-ETH, however, measures the temperature, O2, H2O and CO in real-time, directly inside the cracking furnace using TDLAS technology. The ZoloSCAN delivers quantitative, actionable information that can be used for combustion monitoring and balancing to improve cracker performance and reliability.

ZoloSCAN_Schematic

ZoloSCAN Schematic
Click on image to enlarge

Actionable Information for Ethylene Furnaces

The Zolo system interface provides real-time balance information for each group burners across the furnace. Operators can use the ZoloSCAN-ETH system interface to make manual or automated adjustments to select groups of burners to improve the temperature and oxygen balance in the furnace. The ZoloSCAN-ETH measurement paths also provide a more representative sample of the overall excess O2 levels for better O2 control at the furnace outlet. Arrangement of the paths will depend on the furnace and burner configuration, tube geometry, and furnace wall access.

Plan View of ZoloSCAN-ETH System Layout in Furnace

ZoloBOSS paths can be arranged over sets of burners to provide information that matches furnace controls

ZoloSCAN-ETH paths can be arranged over sets of burners to provide information that matches furnace controls

ZoloSCAN-ETH System interface

Example ZoloBOSS interface showing measurements inside of cracking furnace

Example ZoloSCAN-ETH interface showing measurements inside of cracking furnace