ASME PTC 47.3-2021 pdf download
ASME PTC 47.3-2021 pdf download.Syngas-Conditioning Block of an Integrated Gasification Combined Cycle Power Plant.
fuel gas (syngas) rate: syngas consumption per hour per unit output in which the turbine is charged with the syngas quantity supplied. fuelgascontaminants: compounds thatare eitherpotentiallydeleterious to the gas turbine and powerblockingeneral or are precursors to stack emissions. Fuel gas contaminants include the following: (a) sulfur-,nitrogen-,orchlorine-containingcompounds[i.e.,hydrogensulfide(H 2 S),carbonylsulfide(COS),ammonia (NH 3 ), hydrogen cyanide (HCN), and hydrogen chloride (HCl)] (b) tars and condensables [i.e., long-chain or cyclic hydrocarbons (C x H y )] (c) particulates (i.e., inert ash and components potentially corrosive to the gas turbine, including vanadium, lead, calcium, and nickel) (d) volatilized alkali metals (i.e., sodium and potassium) gross heatofcombustion atconstantvolume: the heat produced by the combustion ofunit quantity ofsolid or liquid fuel when burned at constant volume in an oxygen bomb calorimeter under specified conditions, with the resulting water vapor condensed to a liquid. Expressed in MJ/kg (Btu/lbm). (ASTM D121) heat input: the mass flow rate of fuel(s) multiplied by the high or low heat value of the fuel(s). heatofcombustion: the heatreleased from the complete oxidation ofa fuel in which the reactantproducts ata reference condition. heating value: the energy released when a fuel and oxidant normally at 25°C (77°F) are burned to completion and the products ofcombustion are cooled to a specified temperature, normally25°C (77°F). Although the units ofheatingvalue maybeenergyperunitmole [MJ/kg-mol (Btu/lb-mol)] orenergyperunitvolume[MJ/Nm 3 Btu/scf)], theunits ofheating value used in this code are energyperunitmass (MJ/kgorBtu/lbm). Heatingvalue maybe reportedas eitherlower(net) heating value or higher (gross) heating value, as long as all fuels, productgases, and syngases are reported using consis- tentterms.
higher heating value: see heating value. hotgas desulfurization: a process to remove sulfur compounds from the syngas atelevated temperatures. An example is direct contact between syngas and a metal oxide sorbent. integratedgasification combinedcycle(IGCC)powerplants:facilities usingprocessesthatbyreactions withoxygen,steam, carbon dioxide, as well as thermal decomposition convert(partiallycombust) hydrocarbon fuel(s) into a gaseous stream ofcombustible components comprised ofhydrogen, carbon monoxide, methane, and other byproducts ofthe reactions. The oxygen is supplied either from air in air-blown gasifiers or from an oxygen plant in oxygen-blown gasifiers. The resultinggasisfiredinagasturbinetoproducepower,followedbyheatrecoveryfromtheexhaustgasestoproducesteam thatis combined with steam produced bythe gasifier syngas coolers for additional power generation in a steam turbine. IGCC plants may also produce export syngas and export steam. losses: the energythatexits an equipmentorgroup ofequipmentenvelope otherthan the energyin the outputstream(s). Examples of losses include (a) heat lost to the atmosphere (b) energy loss caused by mechanical inefficiency (c) heat loss from the steam turbine condenser low-Btu gas:asynthesis gas producedbygasificationwithair. Ithas ahigherheatingvaluebelow7 MJ/Nm 3 (180 Btu/scf). lower heating value: see heating value. medium-Btu gas: a synthesis gas produced by gasification with oxygen. It has a higher heating value between 7 MJ/Nm 3 and 20 MJ/Nm 3 (180 Btu/scf and 500 Btu/scf). mesh: measure of the fineness of a screen in terms of the number of openings per inch.
precision error: see error, random. precision: the closeness of agreement between repeated measurements. primary measurement: measurement that is used in the calculation of test results. productsyngas:forthepurposesofthis Code,theproductsyngascomprisesthesyngascomponentsthatareinthefuelgas thatisultimatelydeliveredtothepowerblock,aftercontaminantssuchasmercury(Hg),hydrogensulfide(H 2 S),carbonyl sulfide (COS), and ammonia (NH 3) have been removed. See Figure 2-2-1. pressure swing adsorption (PSA): a gas separation process by which selected gases are attracted to solid surfaces, or “adsorbed” at high pressures and released or “desorbed” to a waiting container when the pressure is reduced. PSA separates gases from mixtures because different gases have stronger or weaker attractions to different solid surfaces. purge: to introduce air, nitrogen, or another fluid into or from a piece ofequipmentin such volume and in such a manner that the new fluid completely replaces the air or gas–air mixture contained therein. random error: see error, random. recycle rate: the mass flow rate ofmaterial being reinjected into a piece ofequipment, such as a furnace or combustion chamber, to reprocess unconverted material.
