Development of a retrofit coal combustor for industrial applications, (Phase 1-A). Technical progress report, July--September 1988
During this past quarter, two tandem-fired pulse combustors were designed to fire at a nominal rate of 3.5 to 5.5 MMBtu/hr under continuation of Phase I work on DOE project DE-AC22-87PC79654. In prior work, MTCI demonstrated the operation of a 1--2 MMBtu/h coal-fired tandem pulse combustor that is intended for small industrial applications. These component tests emphasized verification of key design issues such as combustor coupling, slag rejection, and staged air addition. The current work, which represents an extension of the Phase I effort, focuses on integrated testing of the tandem pulse combustor with a fire-tube boiler, and the addition of a slag quench vessel. A tandem-fired pulse combustion unit designed to fire at a nominal rate of 3.5-5 MMBtu/hr was designed and fabricated. The configuration includes two combustion chambers cast in a single monolith, tailpipes cast separately with annular air preheating capability, and a cyclonic decoupler. Design analysis and evaluations were performed to optimize the system with respect to minimizing heat losses, size, and cost. Heat losses from the combustor and decoupler walls are predicted to be approximately 3 percent. The final designs for the ancillary items (slag quench, tertiary air addition, scrubber and sampling system) were completed and fabrication and installation initiated. A Cleaver-Brooks 150 hp-4 pass boiler was delivered and installed and modifications for interfacing with the retrofit pulse combustor unit completed. A below-ground slag collection pit was excavated to permit direct in-line coupling of the combustor to the boiler and to reduce head-room requirements. The pit is 30 inches deep and lined with waterproof and fireproof siding.
- Research Organization:
- Manufacturing and Technology Conversion International, Inc., Columbia, MD (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-87PC79654
- OSTI ID:
- 10139615
- Report Number(s):
- DOE/PC/79654-T6; MTCI-79654-106; ON: DE93011509
- Resource Relation:
- Other Information: PBD: Oct 1988
- Country of Publication:
- United States
- Language:
- English
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