Numerical Simulation Of Industrial Sludge Blending And Detection Analysis In A New Incinerator

With the improvement of production and living standard,the amount of solid waste has increased rapidly in recent years.In the context of building a"waste-free city"and realizing green development,waste disposal has become a key problem that needs to be solved urgently.Waste incineration has gradually become the primary choice for disposal of waste due to its advantages of harmless,resource and reduction.At the same time,the organic solid waste from industrial in China has a large yield and high potential utilization value.The rational utilization of solid waste can be realized by co-incineration the organic solid waste from domestic with the organic solid waste from industrial.In this paper,CFD is used to optimize the operation of incinerator.The operation optimization of incinerator is studied by adjusting the operating parameters.Then in order to understand the combustion process of the incinerator and evaluate its combustion effect,the fly ash and slag are collected to analyze its characteristics,and the temperature field test of the incinerator is carried out.FLIC and Fluent are used to simulate the combustion process in a new waste incinerator.The household waste and industrial sludge co-incineration numerical simulation was carried out.The influence of mixing ratio of industrial sludge and water content on the combustion process in the incinerator was studied,and the optimization of primary air distribution was studied.The results show that it is feasible to co-incineration sludge with waste.With the increase of sludge blending,the evaporation of water is decreased,the temperature is decreased,and NO emission decreases.The temperature and NO emission are less affected when 10%sludge is mixed.With the increase of sludge moisture content,the solid phase combustion process in the bed is delayed,and NO emission is reduced.Increasing the air in the drying and combustion stages can advance the combustion process of the bed and optimize the combustion effect.The combustion effect is best when the ratio of primary air distribution is 22.5:22.5:28:16:6:5.The fly ash and slag along the incinerator were collected to study the microstructure,material composition and other basic characteristics,and the incinerator temperature was measured by the visualization method of digital image processing.The results show that the fly ash is composed of irregularly shaped particles and spherical or ellipsoid particles,and the slag particles are mainly irregular shaped particles.The main components of cyclone separator,horizontal flue fly ash and slag are Ca O and Si O₂,The fly ash of bag filters is mainly Ca O.The lower melting point of fly ash of bag filters is beneficial to melting treatment.The existence of characteristic spectral lines of Na and K has little effect on temperature detection.The two-color method can be used to detect the combustion process in the incinerator.