Study On Antibiotics Residue Isothermal Pyrolysis Characteristics And Gasification Process Numerical Simulation

Antibiotics residue is produced in the production of antibiotics,belonging to industrial waste.Our country is a big country for antibiotic drugs.So the production is very large.Antibiotics residue has become a problem in pharmaceutical enterprises.Compared to traditional biomass,generally over 70%,and has odor.So it is listed as hazardous waste and limited the traditional processing ways such as incineration or landfill.Many researchers put forward a variety of ways,such as extracting useful material,fermentation,live after used for aquaculture feed and so on,but the effect is not very desirable,and they can’t large-scale industrial application.The traditional biomass fluidized bed processing technology is already relatively mature.This paper is based on this study,using fluidized bed pyrolysis gasification manner to antibiotics residue processing.It can make hazardous waste-antibiotics residue-chemical conversion for clean energy,such as gas,biomass carbon which can be used to make a living or industrial production.Firstly,the changing rule of the pyrolysis gasification products are analyzed in argon atmosphere by using the improved miniature fluidized bed response analyzer under the condition of isothermal pyrolysis experiment.And kinetic parameters are calculated by the model of coordination and changing rate method.Experimental results show the gas yield increases because of temperature,increased significantly between 600 ℃～750 ℃,biological maximum oil production in 600 ℃,the coke yield reduced gradually.Main gas products of antibiotics residue pyrolysis are CO,H₂,CH₄ and CO₂.CO₂ reduces,H₂ and CH₄ show a trend of increase and CO first increases after decreases,peak at about 600℃.Secondly,the fast pyrolysis experiment of penicillin mushroom residue and coal was done inmicro fluidized bed response analyzer under argon atmosphere,examining the total pyrolysis synergies and calculating total pyrolysis kinetics parameters with conversion method.The results shows that the antibiotic mushroom residue and lignite pyrolysis gas production rate and gas body composition deviation with the calculated value,the total pyrolysis produced synergies,synergy with antibiotics residue blending proportion is not a linear relationship.When it was 20%,the promoting effect is obvious.Evaporate into the benchmark as a whole,mushroom residue of antibiotics alone pyrolysis have larger lower compared to join the activation energy,promoted the total pyrolysis reaction,in the industrial processing of antibiotics residue in coal and lignite low-quality sharing can be considered.Thirdly,according to the antibiotics residue pyrolysis kinetic parameters and the chemical reaction equation,the antibiotics residue fluidized bed pyrolysis gasification model is established by using Fluent software.The pyrolysis products of antibiotics residue in the fluidized bed and temperature in the furnace are simulated.The result shows that their change tendency of pyrolysis products is similar and their error is within 10%.The consistent effect is good.The gasification model for antibiotic bacteria slag processing can provide guidance for the design of fluidized bed equipment.Finally,pyrolysis experiment was carried out in pilot scale fluidized bed gasification to analyse the different gasification parameters（moisture content,air equivalent ratio,etc.）.The output of CO₂ and H₂ is higher,CH₄ production is almost the same;Calorific value of the gas product is reduced so that the gas product quality becomes poor.When its moisture content is below 27%,penicillin mushroom residue pyrolysis gasification characteristics is the best at this time.With the increase of a,the CO,CH₄ and H₂ of combustible gas product yield decreased after increased first,and the output of CO₂ increased.The calorific value of gas products also increased after the first decreases,and the tar decreased.