Solution of Combustor Noise in a Coal Gasification Cogeneration Application of 100 MW-Class Combustion Turbines

Author(s):  
A. J. Scalzo ◽  
W. T. Sharkey ◽  
W. C. Emmerling

The field conversion of two W501D5 combustion turbines to burn medium BTU fuel gas supplied by a DOW Chemical coal gasification process at Plaquemine, Louisiana resulted in excessive 105 Hz airborne sound and a corresponding unacceptable non-synchronous engine vibration when burning natural gas. A joint Westinghouse and DOW Chemical corrective action program is described including field tests. Test results indicated that the combustion noise phenomenon was related to the strength of the primary air scoop recirculation pattern and its compatibility with the fuel and steam momentum vectors. A design was selected that eliminated the non-synchronous combustion noise generated vibration and reduced the 100 Hz third-octave noise from 115 db to 97 db, an intensity reduction of 64 to 1.

1990 ◽  
Vol 112 (1) ◽  
pp. 38-43 ◽  
Author(s):  
A. J. Scalzo ◽  
W. T. Sharkey ◽  
W. C. Emmerling

The field conversion of two W501D5 combustion turbines to burn medium Btu fuel gas supplied by a Dow Chemical coal gasification process at Plaquemine, LA resulted in excessive 105-Hz airborne sound and a corresponding unacceptable nonsynchronous engine vibration when burning natural gas. A joint Westinghouse and Dow Chemical corrective action program is described including field tests. Test results indicated that the combustion noise phenomenon was related to the strength of the primary air scoop recirculation pattern and its compatibility with the fuel and steam momentum vectors. A design was selected that eliminated the nonsynchronous combustion noise generated vibration and reduced the 100-Hz third-octave noise from 115 db to 97 db, an intensity reduction of 64 to 1.


Author(s):  
Xiao Rui ◽  
Baosheng Jin ◽  
Yunquan Xiong ◽  
Yufeng Duan ◽  
Zhaoping Zhong ◽  
...  

Coal gasification process and equipment feasibility research were carried out in a 2 MW thermal input pressurized spout-fluid bed pilot-scale gasifier and a long-time-run test was performed to study the effects of operating parameters on coal partial gasification behaviors. The test results have demonstrated the feasibility of the gasifier to provide suitable fuel gas and residual char for downstream system of 2G PFBC-CC. The concentration of methane decreased at higher gasification temperature due to the secondary cracking of methane while the carbon conversion increased, and the concentration of hydrogen increased with an increase of steam flow rate. The main experimental results were compared with those of pilot-scale facilities in the world.


Author(s):  
Federico Bonzani ◽  
Paolo Gobbo

In order to increase the fuel flexibility of the current design of the SynGas burner [4,5,6], Ansaldo Energia, since the growing requests of the market, performed a R&D financed project to use the SynGas fuel available as the unique fuel to feed the gas turbine. Therefore the new working condition to be fulfilled by the modified SynGas burner are the following: a) ignition; b) acceleration; c) loading at part load; d) change over from diffusion line to main SynGas line. To fulfill with new requirements, the standard V94.2K burners have been modified in order to operate from ignition up to the change over point with a SynGas mixture provided by the coal gasification process of a typical IGCC plant [7]. After the design phase, a experimental test campaign on the new design burner has been performed at atmospheric pressure. In order to validate the test results carried out at actual engine working conditions a further test campaign has been performed at the high pressure consistent with the test rig technical limitations [2.3]. The paper show the results carried out that are really promising to meet the customer requirements.


Author(s):  
Michael S. Blinderman

Underground Coal Gasification (UCG) is a gasification process carried on in non-mined coal seams using injection and production wells drilled from the surface, converting coal in situ into a product gas usable for chemical processes and power generation. The UCG process developed, refined and practiced by Ergo Exergy Technologies is called the Exergy UCG Technology or εUCG® Technology. The εUCG technology is being applied in numerous power generation and chemical projects worldwide. These include power projects in South Africa (1,200 MWe), India (750 MWe), Pakistan, and Canada, as well as chemical projects in Australia and Canada. A number of εUCG based industrial projects are now at a feasibility stage in New Zealand, USA, and Europe. An example of εUCG application is the Chinchilla Project in Australia where the technology demonstrated continuous, consistent production of commercial quantities of quality fuel gas for over 30 months. The project is currently targeting a 24,000 barrel per day synthetic diesel plant based on εUCG syngas supply. The εUCG technology has demonstrated exceptional environmental performance. The εUCG methods and techniques of environmental management are an effective tool to ensure environmental protection during an industrial application. A εUCG-IGCC power plant will generate electricity at a much lower cost than existing or proposed fossil fuel power plants. CO2 emissions of the plant can be reduced to a level 55% less than those of a supercritical coal-fired plant and 25% less than the emissions of NG CC.


2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Muhammad Ridwan ◽  
Indradjaja Indradjaja ◽  
Noviyanti Nugraha ◽  
Irfan Taufik

ABSTRAKGasifikasi adalah suatu proses konversi senyawa yang mengandung karbon untuk mengubah material baik cair maupun padat menjadi bahan bakar gas mampu bakar melalui proses pembakaran dengan suplai udara terbatas. Reaktor tempat terjadinya proses gasifikasi disebut gasifier. Gas hasil dari proses gasifikasi disebut syngas. Pada penelitian sebelumnya telah dirancang reaktor gasifikasi dengan menggunakan kotoran sapi sebagai bahan bakar proses gasifikasi. Tipe reaktor yang digunakan adalah tipe downdraft. Tujuan dari penelitian ini adalah menguji performa mesin, menganalisa hasil pengujian dan memodifikasi rancangan reaktor gasifikasi downdraft kapasitas 100 kW. Dari pengujian pertama, diperoleh hasil pengujian yaitu temperatur di dalam ruang pembakaran kurang dari 500°C serta masih terdapat kebocoran pada komponen reaktor. Maka di perlukan modifikasi agar temperature yang ditargetkan yaitu diatas 500°C tercapai dan memperbaiki kekurangan lainnya. Modifikasi yang dilakukan meliputi bagian atas yaitu hopper, pemasangan instalasi pipa 2 in, serta pembuatan kembali saringan ash grate. Setelah melakukan modifikasi, dilakukan pengujian kembali, Hasil pengujian setelah dimodiifikasi diperoleh temperatur antara 550 oC – 600oC.Kata kunci : reaktor, downdraft, gasifikasi, kotoran sapi, pengujjianABSTRACTGasification is a process of converting carbonaceous compounds to convert both liquid and solid materials into fuel gas capable of burning through a combustion process with limited air supply. The reactor where the gasification process occurs is called a gasifier. The resultant gas from the gasification process is called syngas. Previous studies have designed gasification reactors using cow dung as a fuel for gasification processes. The type of reactor used is the downdraft type. The purpose of this study is to test the performance of the engine, analyze the test results and modify the down kaft gasification reactor design capacity of 100 kW. From the first test, obtained the test results that the temperature in the combustion chamber is less than 500°C and there is still leakage in the reactor component. So in need of modifications to the targeted temperature that is above 500°C achieved and fix other deficiencies. Modifications made include the top of the hopper, installation of 2-in pipe installation, as well as remaking ash grate filter. After modification, re-testing, the test results after modified temperature obtained between 550 oC - 600oC.Keywords: reactor, downdraft, gasification, cow dung, test.


1998 ◽  
Vol 38 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Junxin Liu ◽  
Weiguang Li ◽  
Xiuheng Wang ◽  
Hongyuan Liu ◽  
Baozhen Wang

In this paper, a study of a new process with nitrosofication and denitrosofication for nitrogen removal from coal gasification wastewater is reported. In the process, fibrous carriers were packed in an anoxic tank and an aerobic tank for the attached growth of the denitrifying bacteria and Nitrobacter respectively, and the suspended growth activated sludge was used in an aerobic tank for the growth of Nitrosomonas. A bench scale test has been carried out on the process, and the test results showed that using the process, 25% of the oxygen demand and 40% of the carbon source demand can be saved, and the efficiency of total nitrogen removal can increase over 10% as compared with a traditional process for biological nitrogen removal.


Author(s):  
Marian Wiatowski ◽  
Roksana Muzyka ◽  
Krzysztof Kapusta ◽  
Maciej Chrubasik

AbstractIn this study, the composition of tars collected during a six-day underground coal gasification (UCG) test at the experimental mine ‘Barbara’ in Poland in 2013 was examined. During the test, tar samples were taken every day from the liquid product separator and analysed by the methods used for testing properties of typical coke oven (coal) tar. The obtained results were compared with each other and with the data for coal tar. As gasification progressed, a decreasing trend in the water content and an increasing trend in the ash content were observed. The tars tested were characterized by large changes in the residue after coking and content of parts insoluble in toluene and by smaller fluctuations in the content of parts insoluble in quinoline. All tested samples were characterized by very high distillation losses, while for samples starting from the third day of gasification, a clear decrease in losses was visible. A chromatographic analysis showed that there were no major differences in composition between the tested tars and that none of the tar had a dominant component such as naphthalene in coal tar. The content of polycyclic aromatic hydrocarbons (PAHs) in UCG tars is several times lower than that in coal tar. No light monoaromatic hydrocarbons (benzene, toluene, ethylbenzene and xylenes—BTEX) were found in the analysed tars, which results from the fact that these compounds, due to their high volatility, did not separate from the process gas in the liquid product separator.


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