Method and system for reducing nitrogen oxide and sulfur oxide e

Details Method and system for reducing nitrogen oxide and sulfur oxide e Method and system for reducing nitrogen oxide and sulfur oxide e

1997-01-14

1999-10-19

Bennett, Henry

Furnaces

With exhaust gas treatment means

F23J 1500

Patent

active

059670614

ABSTRACT:
A method and system is provided for the reduction of nitrogen and sulfur oxides emissions from carbonaceous fuel combustion flue gases. The method includes the injection of coal water slurry as a reburn fuel into furnace flue gases to partially oxidize the coal water slurry thereby producing reducing gas species in a reburn zone that convert flue gas nitrogen oxides to diatomic nitrogen. Optionally, sulfur oxides may also be removed from the flue gas by adding alkali compounds to the coal water slurry before injecting the slurry into the furnace, or by injecting the alkali compounds separately into the reducing reburn zone in the furnace created by the partial oxidation of the coal water slurry reburn fuel. The alkali compounds react with the sulfur species to produce alkali sulfite and sulfate particulate solids, which can be removed in a downstream particulate removal device such as an electrostatic precipitator or bag house.

REFERENCES:
patent: 3589314 (1971-06-01), Tratz et al.
patent: 3900554 (1975-08-01), Lyon
patent: 4208386 (1980-06-01), Arand et al.
patent: 4325924 (1982-04-01), Arand et al.
patent: 4335084 (1982-06-01), Brogan
patent: 4403941 (1983-09-01), Okiura et al.
patent: 4444126 (1984-04-01), Forster
patent: 4465495 (1984-08-01), Scheffee
patent: 4851201 (1989-07-01), Heap et al.
patent: 4861567 (1989-08-01), Heap et al.
patent: 5078064 (1992-01-01), Breen et al.
patent: 5116584 (1992-05-01), Chen et al.
patent: 5139755 (1992-08-01), Seeker et al.
patent: 5224334 (1993-07-01), Bell
patent: 5270025 (1993-12-01), Ho et al.
patent: 5380342 (1995-01-01), Leonard, III et al.
patent: 5443805 (1995-08-01), Beer et al.
patent: 5513583 (1996-05-01), Battista
patent: 5746144 (1998-05-01), Breen et al.
Morrison D.K. et al., Coal-Water Slurry Reburning for Nox Emissions Control, Proceedings of the 20th International Technical Conference on Coal Utilization & Fuel Systems, Clearwater, FL USA, pp. 47-58, Mar. 1995.
Ashworth R.A. et al., Coal Fines Utilization Technologies, Proceedings of the 20th International Technical Conference on Coal Utilization & Fuel Systems, Clearwater, FL, pp. 559-570, Mar. 1995.
Hsieh, B.C et al., An Analysis of Chemistry and Mechanisms for High Temperature Desulfurization of Low BTU Gas When Using Lime or Limestone, Gilbert Associates, Inc., 1974. (No month.).
Gullet, Brian K. et al., Furnace Slurry Injection for Simultaneous SO.sub.2 /NO.sub.x Removal, The 1991 SO.sub.2 Control Symposium, vol. 2: Sessions 5A-6B, pp. 87-103, Dec. 3-6, 1991.
Eckhart, C.F. and DeVault, R.F., Cyclone Reburn Using Coal-Water Fuel: Pilot Scale Development and Testing, Report DOE/PC/90157-1, Sponsored by U.S. Dept. of Energy and Pittsburgh Energy Technology Center, The Babcock & Wilcox Company, Oct. 1991.
Elliott, Martin A. (Ed.), Chemistry of Coal Utilization, Prepared under the Guidance of the Committee on Chemistry of Coal Utilization, Second Supplementary Volume, pp. 1272-1277, John Wiley & Sons, 1981 (no month).
Lyon, Richard K. and Hardy, James E., Discovery and Development of the Thermal DeNO.sub.x Process, Exxon Res. and Eng. Co., Reprinted from I&EC Fundamentals, vol. 25, No. 1, pp. 19-24, 1986. (No month.).
Miller, James A. and Bowman, Craig T., Mechanism and Modeling of Nitrogen Chemistry in Combustion, Prog. Energy Combust. Sci., vol. 15, pp. 287-338, 1989. (No month.).
Chen, S.L. et al., Advanced Non-Catalytic Post Combustion NO.sub.x Control, Environmental Progress, vol. 10, No. 3, pp. 182-185, Aug. 1991.

Affiliated with

Also associated with

Rating

Method and system for reducing nitrogen oxide and sulfur oxide e does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for reducing nitrogen oxide and sulfur oxide e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for reducing nitrogen oxide and sulfur oxide e will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2043910