OCR Text |
Show • 15 HOST SITE HARDWARE DESIGN The first ARCS demonstration will take place in an APCI owned and operated reformer. The demonstration site has been selected and has the following general operating characteristics: vertical cylindrical upfired\downflow geometry, nominal fired duty in the 10 to 20 · MMBtu/hr range, natural gas fuel, and no export steam requirement. Retrofit of the ARCS burner into the host reformer has presented a number of challenges, with two of the most important being burner installation and 8: 1 turndown capability for system startup. General System Design - Design of the host site radiant burner and combustion has been completed. The burner is cylindrical in shape and is nominally 2 feet in outside diameter by 17 feet long, with the final 2 feet of burner length having a conical shape. A schematic of the installed burner is provided as Figure 9. The burner has a surface area of nominally 100 fe to provide the necessary fired duty to the heater. The fuel-air delivery system design was based on design used previously for similarly sized Pyrocore firetube boiler Pyrocore systems. The burner fabrication process limits maximum single burner "segment" sizes to approximately 3 feet in diameter by 3 feet long. Multiple burner segments are therefore combined to make a single multi-segment burner element. The host site burner design is made up of 5 cylindrical segments, each 2 feet in diameter by 3 feet long, and one conical "end cap" that has a 2 foot diameter base, a 0.75 foot diameter cap, and is 2 feet long. Segments are typically installed individually, and assembled using mechanical fasteners as part of the burner installation process. As with the fuel-air supply, the burner geometry is typical of what would be supplied in a large Pyrocore fire tube boiler installation. Installation - The upfired heater geometry complicates burner installation by requiring that the burner be installed from below the heater and lifted into place. While it may be possible to install from the top of the heater in some cases (particularly in new installations), it would obviously be desirable to be able to install the burner from |