METHANE de-NOX for Utility PC Boilers

Bryan, Bruce ; Rabovitser, Joseph ; Nester, Serguei ; Wohadlo, Stan

Institute of Gas Technology

关键词: Methane;    Boilers;    Testing;    01 Coal, Lignite, And Peat;    Bituminous Coal;   

DOI  :  10.2172/895039
RP-ID  :  None
RP-ID  :  FC26-00NT40752
RP-ID  :  895039

美国|英语

来源: UNT Digital Library

【 摘 要 】

Large-scale PRB testing during the current quarter was cut short due to the inability of the coal mill to meet the 85 MMBtu/h design firing rate. The project was therefore redirected toward design, installation and testing of the 85-million Btu/h preheater for bituminous coal. Based on extensive pilot-scale testing completed earlier in the project, 2-D modeling and preliminary design activities were started based on the use of staged, annular protective air films to control temperature and prevent deposition on the preheater walls. A total of 14 2-D modeling cases were completed for the modified preheater for bituminous coal. The preheater concept modeled was based on an expanding preheater chamber where the diameter of the chamber is increased in steps along its length and annular cooling/protective air is introduced at each step. A process flow diagram for the bituminous coal preheating system and a preliminary preheater design drawing were developed based on the modeling results. A project schedule to complete design, installation and testing of the 85 MMBtu/h bituminous coal preheating system before the end of December was also developed.