Study On Pyrolysis Characteristics And Demonstration Project Of The Organic Waste Sorted From Food Waste

Food waste is a kind of organic waste with the dual characteristics of resources and harm.In the course of biological treatment of food waste,it is inevitable that the residue of plastic,bone,bamboo and fiber is not suitable for biological treatment.It caused the secondary pollution of the kitchen waste disposal process for improper handling.In response to this problem,in order to improve the utilization of food waste,the organic waste sorted from anaerobic fermentation pretreatment of food waste was investigated.The thermogravimetric(TG)characteristics and kinetic analysis were analyzed for its typical components:refractory biomass,bone and plastic.Study on catalytic pyrolysis of targeted synthetic supported perovskite catalysts.And carried out demonstration project research.The typical composition of the organic waste was fully pyrolyzed at 500?.It creates the conditions for mixed pyrolysis.The mixture of three components could promote the pyrolysis process.Plastic and bone had inhibitory effect on the pyrolysis process at low temperatures.While at high temperature,plastic and bone promoted the pyrolysis process.Refractory biomass and bone co-pyrolysis belonged to diffusion control and had the best effect on the rate of reaction when the bone ratio was 20%.With the increase of temperature,the yield of tar decreased,the yield of gas increased and the yield of H2 increased significantly.Different catalysts have different effects on the synthesis and composition of syngas.The maximum H2 yield at 900 °C was 72.22%using LaNi0.8Coo.2O3/?-Al2O3,The ratio of syngas(H2+CO)in the gas phase reached 97.90%at 900? when LaNio.6Fe0.4O3/?-Al2O3 was used.The different substitution ratios of LaNiO3 perovskite B-site metal had different effects on catalyst selectivity.The substitution of a small amount of Co can effectively increase the H2 yield,but it will inhibited the activity of Ni when the substitution rate was high.In this paper,the selectivity of H2 was higher when the substitution rate was 20%.The demonstration project was constructed on the processing capacity of 50 t·d-1 of the food waste disposal plant,based on the experimental results of this paper,which annual production of bio-char 1068 t.It could produce 0.8 MPa saturated steam 965 kg·h-1 by waste heat boiler,much higher than the drying system of steam demand 485 kg·h-1.It achieve carbon emission reduction 1.15 t·d-1.The concentration of dioxin in flue gas is much lower than that of solid waste emission standards(0.019<<0.1 ngTEQ·Nm-3)during the commissioning of the equipment using sludge.To processing a ton of food waste to be consumed 75 yuan,while generating 109 yuan of income.The annual net income was 0.86 million,with significant economic benefits.The above results provide a technical reference for the the organic waste sorted from food waste pyrolysis technology in the food waste biological treatment process.It improve the economics and the degree of resource utilization of the whole process.