Study On The Co-pyrolysis Gasification Characteristics Of Liquor Distiller's Grains And Coal

Guizhou region has abundant anthracite resources, but it has a low volatile content, low ash melting point and high ash and other characteristics, exists gasification reactivity poor, low utilization, environmental pollution and other issues.Meanwhile, China has a large white wine winery, in the region of Guizhou has Maotai and many other white wine winery, white wine distillery residue as saccharomyces produced affiliate products,how efficient resource utilization is problems to be solved.At present,biomass and coal co-pyrolysis and gasification technology is developing rapidly, biomass and coal having a large difference in the physical and chemical characteristics,the joint use of both will produce better results.Coal and distillery residue contain alkali metals and alkaline earth metals.They have a very obvious catalytic action in the coal gasification process,and greatly improving the coal gasification reactivity.At the same time, also can be effectively used distillery residue itself contains thermal energy to overcome the dry coal gasification of coal demand too much disadvantage,reducing the use of coal, improve coal gasification single nature, achieve efficient use of distillery residue and coal.In this paper,distillery residue and coal co-pyrolysis and gasification characteristics are explored and researched.The use of a fixed bed reactor and TGA study distillery residue and anthracite co-pyrolysis characteristics, the use of home-made charring devices determines the best distillery residue carbonization conditions, the use of a fixed bed reactor compares the distillery residue and coal char co-gasification characteristics with the distillery residue char and coal char.Utilizing SEM, EDX and XRD characterization means,and characterizing and analysising the distillery residue and coal co-pyrolysis and gasification process of raw materials and products.Mainly involves the following aspects:1?In the distillery residue and anthracite co-pyrolysis process, there is a certain degree of interaction.The produced gas total concentration during distillery residue pyrolysis is higher than anthracite pyrolysis,with the blending ratio of distillery residue increases, the higher the produced gas total concentration during co-pyrolysis process.Distillery residue pyrolysis temperature lower than the anthracite pyrolysis temperature, in co-pyrolysis process,distillery residue added can well improve the anthracite pyrolysis rate.With the blending ratio of the distillery residue increases,co-pyrolysis mass loss rate is gradually increased, the maximum weight loss rate of pyrolysis section increases.The first order reaction model suitables for distilleryresidue and anthracite co-pyrolysis.Distillery residue pyrolysis activation energy(59.802KJ/mol) is lower than anthracite pyrolysis activation energy(16.028KJ/mol), co-pyrolysis activation energy is lower than the anthracite pyrolysis activation energy, higher than the distillery residue pyrolysis activation energy.2?With the reaction temperature increasing from 900 ? to 1100 ?, distillery residue, distillery residue char and coal char gasification reactivity increase;at different CO2 flow rate 300-500ml/min, the gasification reactivity of distillery residue,distillery residue char and coal char little difference, selecting the best CO2 flow rate300ml/min.3?The co-gasification reactivity of distillery residue and coal char has significant synergies,and except CO2,the main production of this reactivity is CO,H2 and CH4, and the blending ratio of the distillery residue 80%,the highest concentration of the three gases.The gasification temperature and the blending ratio of distillery residue are the major factors which affect the co-gasification reactivity.At the same the blending ratio of distillery residue,within a temperature range of 900~1100?,with increasing temperature,the higher the co-gasification reactivity;at the same temperature,the blending ratio of distillery residue range of 20%~80%,with the blending ratio of distillery residue increases,the higher the co-gasification reaction activity.4?Best carbonization conditions distillery residue are: carbonization temperature is 550 ?, heating rate is 10 ?/min and the retention time is 60 min.5?The co-gasification reactivity of distillery residue char and coal char has significant synergies.The co-gasification process of distillery residue char and anthracite char, except the gasification agent CO2, the tail gas mainly produced H2 and CO.With the blending ratio of the distillery residue char increasing,the mole percent concentration of H2 and CO are gradually increase, the mole percent concentration of H2 and CO are gradually decrease.Gasification temperature and the blending ratio of the distillery residue char have a greater impact on the co-gasification activity.In the same blending ratio of the distillery residue char, with increasing temperature, the higher the co-gasification reaction activity; at the same gasification temperature, with the increasing the blending ratio of the distillery residue char,the higher co-gasification reactivity.6?Compare distillery residue before and after charring and coal char co-gasification reactivity, under the same gasification reaction conditions,distilleryresidue char and coal char co-gasification reactivity was significantly higher than the distillery residue and coal char.The reason is that distillery residue char has the much developed pore structure than distillery residue.So in the co-gasification process, the mixing sample with gasification agent CO2 has the greater contact area,and the fixed carbon content greater than distillery residue.7?Coal and distillery residue contain high content alkali metals and alkaline earth metals.They jointly play a catalytic role in the distillery residue and anthracite co-pyrolysis and co-gasification process.