Allalysis And Study On Deposits In Biomass Plant

Due to biomass power generation can maintain energy security, ensure the sustainable development of society, reduce greenhouse gas emissions, environmental pollution and other advantages, biomass power generation has drawn word’s attention. Efficient direct combustion of biomass power generation technology has been mature at home and abroad. The biggest crop straw burning biomass power plant Ely which installed capacity of38MW locates in UK. At the end of2010, China’s biomass power installed capacity has reached5.5million kilowatts. The industry developed rapidly in recent years. Expected by the end of2015, compared with2010biomass power generation capacity will be doubled, to reach13million kilowatts.Currently the superheater coked is a key issue during biomass power plant operating. It has a tremendous impact on economic and safe operation of the plant. Especially the medium temperature superheater, some plants blocked in an average month, leading to shutdown cleanup. Biomass contains high alkali metals and chlorine content, which are easily formed low melting point compounds in the combustion process. The low melting point compounds on heat-absorbing surface are easily absorbed ash particles and are mainly reason to form ash and coke.This article studies on Xinjiang cotton stalks, wheat straw, corn stalks by industrial analysis, Thermogravimetric analysis and pollutants. As Xinjiang is China’s largest cotton base and cotton is one of the main fuel in biomass power, he cotton stalk ashes prepared by firing at400,600and800℃were studied by X-ray fluorescence and X-ray diffractometer analysis which provides rational utilization of biomass cotton stalk provide some basis for decision making. In order to explore deposits on intermediate temperature superheaters in a biomass power plant. X-ray fluorescence spectrometer (XRF) and X-ray diffraction (XRD) techniques were used in determining the ash composition and structure. On the basis of elaborating the formation and development process of deposits, discussed the deposits form mechanism.