ASME PTC 47-2006 pdf download.Integrated Gasification Combined Cycle Power Generation Plants.
1-1 OBJECT This Code provides procedures for performance test- ing of integrated gasification combined cycle (IGCC) power plants to determine fuel gas flow and quality, thermal efficiency (heatrate), and power outputatspeci- fied operating conditions. It also provides procedures to determine the flow and quality of cleaned fuel gas produced by the IGCC plant. (a) If electric power is the only product of the IGCC plant, this Code provides procedures for determining (1) corrected net power (2) corrected heat rate (3) corrected heat input (b) If the IGCC plant performance test also includes exported synthesis gas and/or process steam, this Code provides procedures for determining (1) corrected net power (2) corrected heat input (3) export syngas pressure (4) export syngas temperature (5) export syngas composition (6) export syngas flow (7) export syngas heating value (8) product gas contaminant content (see subsec- tion 1-2) (9) export steam pressure (10) export steam temperature (11) export steam composition (12) export steam flow (c) Tests may be designed to satisfy different goals. Two such tests are (1) Specified Corrected Net Power Test (2) Specified Disposition Test 1-2 SCOPE This Code covers a defined range of primary fuel characteristics, but is limited to combined-cycle, power- generation systems using gas and steam turbines.
This Code defines the boundaries of the overall IGCC power plant to encompass three major plant sections — the air separation unit (ASU, for oxygen-blown gasifiers or plants that use nitrogen), the gasification process (including gas cleanup), and the power block. Tests con- ducted by this Code determine the quantity and quality of fuel gas by its flow rate, temperature, pressure, com- position, heating value, and its content of contaminants. Contaminants are compounds that are potentially dele- terious to the gas turbine and power block in general, or are precursors to stack emissions. Contaminants to be measured are sodium (Na), potassium (K), vanadium (V), lead (Pb), calcium (Ca), barium (Ba), manganese (Mn), phosphorus (P), sulfur compounds (H 2 S and COS), nitrogen compounds (HCN and NH 3 ), chlorine compounds (HCl), and particulate matter. Recommendations are included for the following in pretest agreements: testing procedures, types of instru- ments, methods of measurement, methods of calcula- tion, and contents of test reports. Regulatory compliance testing of IGCC power plants is not covered by this Code. 1-3 UNCERTAINTY Calculation procedures in accordance with those set forth in PTC 19.1 are presented to determine the uncer- tainty in measurements and performance parameters associated with the specified test procedures of this Code. Under typical conditions and with currently available instruments, the largest expected total uncertainties in the test results are those in Table 1-3. A post-test uncertainty analysis is required. However, a post-test uncertainty analysis is optional if parties to the test agree that the test adhered to all instrumentation requirements and procedures contained in this Code and to the agreed test procedure.
2-1 DEFINITIONS absorption dynamometer: device that may be connected to the output shaft of a prime mover in place of the driven load, which absorbs the output of the prime mover while transmitting the torque to a stationary member where it can be measured accurately. accuracy: closeness of agreement between a measured value and the true value. acid gas: contaminants in the syngas, consisting ofhydro- gen sulfide (H 2 S), carbonyl sulfide (COS), and carbon dioxide (CO 2 ). Acid gas may also refer to a concentrated stream of one or more of these components. acid gas removal process: process that removes one or more ofthe acid gascomponents fromthe syngas, also referred to as the gas cleanup process. NH 3 , HCN, and HCl have several and varied methods of removal, such as a water wash, which goes to subsequent water cleanup before discharge. See ambient temperatureacidgas removal process, cold acid gas removal process, and hot acid gas removal process. additive: substance added to a gas, liquid, or solid stream to cause a chemical or mechanical reaction to enhance collection efficiency. aftercooler: heat exchanger for cooling a fluid, following the last stage of compression. agglomerating ash gasifier: type of fluid-bed gasifier that contains a hot zone in which the ash particles are agglomerated into small pellets for removal. air, corrected theoretical: theoretical air adjusted for unburned carbon and additional oxygen required to complete other reactions, i.e., the sulfation reaction. air, excess: air supplied to burn a fuel in addition to the minimum necessary for complete combustion. Excess air is expressed as a percentage ofthe corrected theoreti- cal air in this Code. air, infiltration: influx of air into the steam generator envelope. air, theoretical: amount of air required to supply the exact amount of oxygen necessary for complete combustion of a given quantity of fuel. Theoretical air and stoichio- metric air are synonymous.