High Efficiency Landfill Gas Fired Power Plant Process with ORC  

作　　者：Petri Kouvo 

机构地区：[1]HSY Helsinki Region Environmental Services Authority, P.O. Box 100, FI-00066 HSY, Helsinki, Finland

出　　处：《Journal of Earth Science and Engineering》2016年第5期254-263,共10页地球科学与工程（英文版）

摘　　要：Helsinki Environmental Services Authority HSY ,Ammaissuo waste management centre consists of two landfill sites. The old land filling area was established in 1987 and closed in 2007. The landfilling at the new landfill section started in November 2007. Until spring 2014 the main treatment method for source separated MSW （municipal solid＇waste） collected from Helsinki Metropolitan area households was landfilling. Approximately 250,000 tonnes of MSW was landfilled annually. From April 2014 on all of the MWS has been utilized in heat and electricity production at new Waste to Energy plant owned and operated by energy company Vantaa Energy Ltd. The landscaping of the landfills is currently ongoing. The construction of the landfill gas collection system was started in 1994 and from 1996 on landfill gas from old landfill area was recovered and burned in torches to reduce the greenhouse gas effect caused by methane in landfill gas. In the end of year （2004） new landfill gas utilisation system was taken in use Gas was used as a fuel in HOB （heat only boiler） to generate district heating for nearby community as well as commercial and industrial sites. The capacity of the system was 7,000 Nm3/h that corresponded to app. 30 MW of heat. Since district heat was mainly needed only during the cold season of the year only about half of the landfill gas produced by the landfill was able to utilize and rest of the gas was still flared leading to relatively low utilization rate of the gas. The construction work of the new 15 MW ＋ 1.2 MW electricity power plant started in spring 2009. The power plant consists of four gas engines and generators and organic rankine cycle process utilizing thermal oil for heat transfer from exhaust gas and steam turbine with hexamethyldisiloxane （silicone oil） as a medium agent. The ORC （Organic Rankine Cycle）-process was commissioned in August 2011 and the operational experiences have been very good. Based on current knowledge the HSY power plant is the biggest landfill gas fir

关 键 词：Landfill gas power production ORC-process waste management BIOWASTE anaerobic digestion. 

分 类 号：X705[环境科学与工程—环境工程] X701