Development of an advanced high efficiency coal combustor for boiler retrofit. Task 1, Cold flow burner development: Final report

摘要

The overall objective of this program is to develop a high efficiency advanced coal combustor (HEACC) for coal-based fuels capable of being retrofitted to industrial boilers originally designed for firing natural gas, distillate, and/or residual oil. The HEACC system is to be capable of firing microfine coal water fuel (MCWF), MCWF with alkali sorbent (for SO(sub 2) reduction), and dry microfine coal. Design priorities for the system are that it be simple to operate and will offer significant reductions in NO(sub x), SO(sub x), and particulate emissions as compared with current coal fired combustor technology. The specific objective of this report is to document the work carried out under Task 1.0 of this contract, ''Cold Flow Burner Development''. As are detailed in the report, key elements of this work included primary air swirler development, burner register geometry design, cold flow burner model testing, and development of burner scale up criteria.