Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier
Reexamination Certificate
2006-02-08
2010-11-09
Griffin, Walter D (Department: 1797)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Waste gas purifier
C422S171000, C422S172000, C422S173000, C423S239100
Reexamination Certificate
active
07829033
ABSTRACT:
A preferred apparatus arrangement utilizes the enthalpy of the flue gas, which can be supplemented if need be, to convert urea (30) into ammonia for SCR. Urea (30), which decomposes at temperatures above 140 .degree. C., is injected (32) into a flue gas stream split off (28) after a heat exchanger (22), such as a primary superheater or an economizer. Ideally, the side stream would gasify the urea without need for further heating; but, when heat is required it is far less than would be needed to heat either the entire effluent (23) or the urea (30). This side stream, typically less than 3% of the flue gas, provides the required temperature and residence time for complete decomposition of urea (30). A cyclonic separator can be used to remove particulates and completely mix the reagent and flue gas. This stream can then be directed to an injection grid (37) ahead of SCR using a blower (36). The mixing with the flue gas is facilitated due to an order of magnitude higher mass of side stream compared to that injected through the AIG in a traditional ammonia-SCR process.
REFERENCES:
patent: 3032287 (1962-05-01), Laszlo
patent: 3599427 (1971-08-01), Jones
patent: 3900554 (1975-08-01), Lyon
patent: 4107272 (1978-08-01), Mori et al.
patent: 4138469 (1979-02-01), Kato et al.
patent: 4160009 (1979-07-01), Hamabe
patent: 4208386 (1980-06-01), Arand et al.
patent: 4268488 (1981-05-01), Ginger
patent: 4325924 (1982-04-01), Arand et al.
patent: 4393031 (1983-07-01), Henke
patent: 4533364 (1985-08-01), Altman et al.
patent: 4767605 (1988-08-01), Lindbauer et al.
patent: 4925036 (1990-05-01), Sumi
patent: 4925640 (1990-05-01), Morii et al.
patent: 5133950 (1992-07-01), Oakes et al.
patent: 5252298 (1993-10-01), Jones
patent: 5282355 (1994-02-01), Yamaguchi
patent: 5294409 (1994-03-01), Cohen et al.
patent: 5300270 (1994-04-01), Krigmont et al.
patent: 5431893 (1995-07-01), Hug et al.
patent: 5465690 (1995-11-01), Viel Lamare et al.
patent: 5585081 (1996-12-01), Chu et al.
patent: 5601792 (1997-02-01), Hug et al.
patent: 5943865 (1999-08-01), Cohen
patent: 5976475 (1999-11-01), Peter-Hoblyn et al.
patent: 5985224 (1999-11-01), Lagana
patent: 5988115 (1999-11-01), Anderson et al.
patent: 6041594 (2000-03-01), Brenner et al.
patent: 6048510 (2000-04-01), Zauderer
patent: 6063350 (2000-05-01), Tarabulski et al.
patent: 6074619 (2000-06-01), Schoubye
patent: 6077491 (2000-06-01), Cooper et al.
patent: 6093380 (2000-07-01), Lagana et al.
patent: 6146605 (2000-11-01), Spokoyny
patent: 6203770 (2001-03-01), Peter-Hoblyn et al.
patent: 6266953 (2001-07-01), Ramstetter et al.
patent: 6878359 (2005-04-01), Mathes et al.
patent: 6969492 (2005-11-01), Goerigk et al.
patent: 7086222 (2006-08-01), Itoh et al.
patent: 2007/0231232 (2007-10-01), Lin et al.
patent: 1100292 (1981-05-01), None
patent: 19913462 (2000-09-01), None
patent: 210392 (1987-04-01), None
patent: 0 363 684 (1990-04-01), None
patent: 487886 (1992-06-01), None
patent: 615777 (1994-09-01), None
patent: 1024254 (2005-05-01), None
patent: 64-003019 (1989-01-01), None
patent: 1022328 (1989-01-01), None
patent: 2002-86813 (1990-03-01), None
patent: 2005-57146 (1993-03-01), None
patent: 2007-12660 (1995-03-01), None
patent: 2007-12660 (1995-03-01), None
patent: 2000-0282843 (2000-10-01), None
patent: 2000-0282843 (2000-10-01), None
patent: 2000-054828 (2002-02-01), None
patent: 2000-008833 (2004-04-01), None
patent: 2005-272331 (2005-10-01), None
patent: 97/01387 (1997-01-01), None
patent: WO 98/22209 (1998-05-01), None
patent: 99/58230 (1999-11-01), None
patent: 99/67511 (1999-12-01), None
patent: 00/21647 (2000-04-01), None
Machine translation of DE19913462 A1, dated Sep. 21, 1994.
English translation of DE 19913462 A1, which was published Sep. 2000.
Boyle John M.
Carmignani Paul G.
Cummings, Jr. William E.
de Havilland Piers
Sun William H.
Carvis Thaddius J.
Fuel Tech Inc.
Griffin Walter D
Young Natasha
LandOfFree
Selective catalytic reduction of NO x enabled by sidestream... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Selective catalytic reduction of NO x enabled by sidestream..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective catalytic reduction of NO x enabled by sidestream... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4166671