Moving-bed gasification - combined-cycle control study. Volume 2. Results and conclusions, Case 2 - oxygen-blown, slagging-ash operation

Technical Report · Fri Oct 01 04:00:00 EDT 1982

DOI:https://doi.org/10.2172/7024889· OSTI ID:7024889

Priestley, R. R.

A computer simulation study has been conducted to investigate the process dynamics and control strategies required for operation of an oxygen-blown, slagging, moving-bed gasifier combined cycle (GCC) power plant in a utility power system. The gasifier modeled is of the modified Lurgi type as developed by the British Gas Corporation. This study is a continuation of a study on moving-bed GCC control analysis. Work reported on previously (EPRI report AP-1740) was for an air-blown, dry-ash Lurgi GCC power plant and results are compared to this study. The simulated GCC plant configuration is similar to that developed in earlier EPRI economic studies (EPRI report AF-642). The computer model used in the air-blown, dry-ash GCC study was re-configured to represent the oxygen-blown slagging GCC cleanup process and a new gasifier model included. Gas turbine-lead and gasifier-lead control modes were evaluated with respect to power system dynamic requirements. The effect of gasifier output fluctuations, as observed in actual gasifier process development unit operation, was modeled and investigated. In comparison to the air-blown GCC power plant, the oxygen-blown fuel process and power generation process are not as integrated, resulting in less system interaction and reduced difficulty of control. As concluded in the air-blown GCC system study, the turbine-lead control mode is the preferred control strategy because it can effectively meet power system requirements. The large storage volume of the cleanup system is used to advantage and control of the combined cycle is maintained close to that of a conventional-fueled combined cycle. The oxygen-blown system is more responsive than the air-blown system and can successfully meet power system requirements.

• Research Organization: General Electric Co., Schenectady, NY (USA). Energy Applications Program Dept.
• OSTI ID: 7024889
• Report Number(s): EPRI-AP-1740-Vol.2; ON: DE83900520
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
BGC-LURGI SLAGGING PROCESS
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
COMPUTERIZED SIMULATION
CONTROL SYSTEMS
DATA
ELEMENTS
GASIFICATION
INFORMATION
LURGI PROCESS
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
OXYGEN
POWER PLANTS
SIMULATION
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES