Regenerative Micron Raw Material Biomass Gasification System And Experimental Study

With the global energy and environmental problems becoming more and more serious,fossil fuels such as coal,oil and natural gas are gradually being consumed.The development and utilization of new energy sources has become an urgent need for research.Biomass energy has the characteristics of abundant resources,wide distribution,low carbon,clean and renewable,and diverse technologies.Therefore,it has attracted extensive attention from researchers.This paper mainly relies on the national science and technology support plan-biogas industry model research and utilization demonstration?2015BAD21B05?.For the refractory biomass wastes such as agriculture and forestry biomass,aiming at the current problem of low calorific value of gas in gasification of agricultural and forestry biomass and high impurity content in gas,a set of biomass with high calorific value and high gas yield for agriculture and forestry was designed independently.Gasification system,and gasification test of micron-scale gasification raw materials was carried out on the platform.First,the gasification raw materials are selected from the micron-scale gasification raw materials of wood chips and rice husks produced by a biomass micron raw material company,and the raw materials are subjected to thermogravimetry-mass spectrometry?TG-MS?test,and further Determine the optimal reaction conditions.According to the analysis,the weight loss rate is the largest in the 60-80 mesh reaction,and the more the synthesis gas is produced,the peak temperature of each product also reaches the maximum at 60-80 mesh,because the specific surface area of the 60-80 mesh raw material is larger than 40-60 purpose,the heat transfer effect is strong,so the reaction is more complete.The higher the heating rate,the faster the reaction,the higher the weight loss rate,and the higher the synthesis gas production.Secondly,self-built a regenerative biomass micro-fuel gasification system,which consists of six major modules,namely gas-solid mixed feed module,dual gasifier module,valve control module,and syngas cooling.Purification processing module,data acquisition module.After some improvements and optimizations were made to the structure and process of the biomass micro-fuel gasification system,the temperature-enhanced commissioning and air-mixing feeding experiments were carried out to determine the experimental conditions of the experimental system.The research results are as follows:1.The calorific value generated after gasification increases with the increase of reaction temperature,and has a maximum calorific value of 4.43 MJ/m³ at 1100?.The carbon conversion rate increases rapidly with the increase of the reaction temperature,and the gas production also increases.2.The gasification temperature has a great influence on the distribution of gas products.The concentration of H₂ always increases with the increase of gasification temperature,and the concentration of CO also increases slightly.3.As the reaction temperature increases,the H₂/CO ratio increases,and the gas production increases with the increase of the reaction temperature,but the growth rate of the value varies greatly in different temperature ranges.At 1000?,the maximum values of H₂/CO and gas production were obtained?0.582 and 2.83 Nm 3/kg,respectively?.4.The content of CO produced by wood gasification of wood chips is significantly higher than that of gas produced by rice straw gasification.The content of methane produced by gasification of rice husk is significantly higher than that of methane gasification.5.also analyzed the influence of the feed amount on the gasification performance,by changing the frequency of the variable frequency motor of the unloader to change the feed rate,and found that the gasification effect is better between 14-19Hz,the combustible component?CO+H₂?content in the syngas is higher,the calorific value is higher,and the carbon conversion rate is also higher.