The Experimental Determination Of The Biomass Fuel Properties And Study On Anti-corrosive Coating For Biomass Power Plant Equipment

In the face of increasing serious fossil energy crisis,people have realized deeply the importance of biomass energy and it will be a vital part of future sustainable energy system.High attention has been paid to the development and utilization of renewable energy all over the word. The development and utilization of biomass is one of the effective ways to solve the energy problem.The elements of biomass have important significance on studying the pyrolyzation and combustion, but the determination to elements of biomass is with reference to the standards of coal, which is usually hard to meet industrial demands. The main way of biomass utilization is to generate power by the direct combustion. It is with the most serious problems of dust, scorification and corrosion problems of superheater under high temperature. Corrosion and slagging have a direct link with ash melting in the process of bombustion. Study on the biomass ash melting characteristic is the basic and key point for corrosion prevention and control.The development of high temperature anti-corrosion coating is in favor of the use of biomass energy on a large scale.In this paper, we obtain the high temperature combustion and infrared thermal conductivity method through orthogonal experiment. Then compare this method with improved Liebig method and Semi-micro Kjeldahl method. The results show that the improved high temperature combustion and infrared thermal conductivity method has many advantages, like small measuring error, high accuracy, short cycle, high automatic degree, small pollution and so on.On the basis of accurate determination of element content in biomass, further study for biomass power plant boiler equipment was conducted, combined with the content of elements in the biomass and the impact of ash melting caused by ash composition. Through the five kinds of anticorrosive coating, laser cladding preparation and the coating microhardness test and simulation of high temperature corrosion experiments. Five kinds of anticorrosive coating were made through laser cladding. The coating microhardness test and simulation corrosion experiments under high temperature were researched in this paper.The morphology after coating of high temperature corrosion was observedthrough scanning electron microscope (SEM). The anticorrosive coating chemical mechanism was analyzed under high temperature.