Multilevel sampling system for gas analyser in circulating fluidized bed gasification

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Saeed, Loay
dc.contributor.advisor Skargersten, Jonatan García Hernández, Raúl 2016-12-08T13:28:55Z 2016-12-08T13:28:55Z 2016-11-21
dc.description.abstract The main topic of this Master’s Thesis is the development of a multilevel sampling system for gas analysers, in which a single gas analyser can measure the gas composition from gasification or combustion, in three different levels in a riser of a circulating fluidized bed reactor. The two analysers used in this work were the Dx-4000 GASMET gas analyser and the Siemens ULTRAMAT 23 gas analysers. The multilevel sampling system consist of three levels, which are connected to the reactor by steel pipes. There is a computer controlled solenoid valves that controls which level is sampled. In addition, there is an oil scrubber in each level to protect the system from unwanted and dangerous substances such as tar. Heat transfer equations have been used in the process of designing the multilevel system in order to not surpass the maximum allowable temperature of some components. The residence time has also been considered in designing the system, as it is an important parameter, since it had to be as short as possible to avoid some changes in the composition of the gas sampled as well as increasing the acquired amount of reliable measurement data from each test. Finally, the transitional and steady time (residence time) for reliable measurements were calculated for both analysers, obtaining 60 seconds of reliable measurements for GASMET analyser and 40 seconds for ULTRAMAT analyser. One combustion test was done in order to check that the system worked correctly, whose the results were satisfactory. en
dc.format.extent 78+3
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Multilevel sampling system for gas analyser in circulating fluidized bed gasification en
dc.type G2 Pro gradu, diplomityö fi Insinööritieteiden korkeakoulu fi
dc.subject.keyword multilevel en
dc.subject.keyword gasification en
dc.subject.keyword combustion en
dc.subject.keyword analyser en
dc.subject.keyword residence time en
dc.subject.keyword tar en
dc.identifier.urn URN:NBN:fi:aalto-201612085818
dc.programme.major Energiatekniikka fi
dc.programme.mcode K3007 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Järvinen, Mika
dc.programme Energia- ja LVI-tekniikan koulutusohjelma fi

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