Pyrolysis-catalytic Reforming Process And Plant Design Of 10,000 T/a Corn Straw

Biomass energy is an important part of renewable energy.Its development and utilization have good economic and social benefits in increasing farmers’income,mitigating greenhouse effect and reducing carbon emissions,and meet the macro requirements of energy conservation and emission reduction.However,the low energy density and poor dispersibility of biomass energy limit its circulation and use as commodities.Therefore,it needs to be converted into substances with high energy density such as biomass carbon black and bio-oil.In this paper,corn stalks were taken as an example,and the experimental study and pilot production design of the thermochemical comprehensive utilization process were carried out.In this paper,industrial analysis,elemental analysis and thermogravimetric analysis of raw corn stover were carried out.The experimental results of the temperature-programming process and the stability of the experimental process of the self-made quartz tube reactor were verified.The results show that the device is stable and reliable.Some important influencing factors in the pyrolysis process and catalytic reforming process of corn stover were optimized.The experimental results of pyrolysis process showed that the pyrolysis heating rate at 20°C/min and the pyrolysis temperature of 550℃were obtained.The ratio of liquid phase products is the highest;the experimental results of catalytic reforming show that the catalytic effect of SXICC multi-polar pore zeolite catalyst is better than that of Na₂CO₃ and MgCl₂ at 400℃.The catalyst improves the quality of bio-oil and makes it more clarified.The calorific value of bio-oil is increased,the composition of the gas phase is optimized,and the content of effective components such as H₂,CO,CH₄ is increased,and the catalytic effect is good.Under the pyrolysis heating rate of 20℃/min,the pyrolysis temperature of 550℃,the catalytic reforming temperature of 400℃and the SXICC catalyst,After pyrolysis-catalytic reformingthe,the corn stalk finally transformed into 30.02%material carbon black,42.55%bio-oil and 27.43%bio-combustible gas.Bio-carbon black can be used as low-quality carbon black after simple processing;bio-oil can be mixed with diesel to produce higher economic value.Biomass gas can be used as a gaseous fuel.Based on the results of the pilot test,this paper designed a pilot process for the treatment of 10,000 tons of corn stover per year.The process consists of a corn stover pyrolysis section,a volatile component catalytic reforming section,and a gas-liquid condensation separation section.And the composition of the tail gas treatment section,the organic connection between the four sections,the conversion from corn stover to biomass carbon black and bio-oil.At the same time,the temperature control and pressure control during the operation of the device are automatically designed to ensure timely warning and safe handling when the temperature and pressure exceed the normal value.Then according to the pilot process,the materials and energy involved in each section are processed and calculated,and the main reaction devices involved in the pyrolysis-catalytic reforming process of corn stover,such as pyrolysis furnace,are based on the process balance.The catalytic reforming reactor and the oxidative denitration tower were subjected to calculation design and drawing,and the equipment floor plan was completed and the equipment list of the whole design process was listed.In this paper,the three wastes and noise involved in the pyrolysis-catalytic reforming process of corn stover were analyzed and processed.The preventive measures for the pilot production process were designed.The cost and benefit of the corn stover pyrolysis catalytic reforming process were compared.The source of raw materials for the production process has been expanded.The results show that the comprehensive utilization of biomass represented by corn stalks to prepare biomass energy is in line with the national energy development strategy and has good economic and social benefits.