| Aquatic plants and organic waste were biomass waste, which have significant numbers and areas. they were caused not only serious environmental pollutions, but also great waste of resources, water hyacinth is a typical invasive aquatic plants, and cottonseed black liquor is a typical chemical waste in China, because these large amount of biomass waste resources and high water content, it is difficult to purify by direct incineration or chemical digestion and any other traditional methods. It is a Technical problem toresource utilize these high water content of biomass waste safely, harmlessly.. In this paper, the high water content biomass waste, were prepared for a coal-water slurry fuel with coal power and then gasification combustion. It can be not only purified biomass waste, but also recycle of biomass energy.and it make an important contribution to energy saving and emission reduction, low-carbon economy and circular economy.In this paper, the co-slurrying properties of water hyacinth blending with coal or petroleum coke were studied. The influences of different types of coal and petroleum coke to the properties of biomass-CWS were investigated. Experiments show that:the water hyacinth and other biomass, could prepare slurry fuel of good performance with petroleum coke and anthracite, the dry water hyacinth dosage can reach7.27%of the anthracite powder, while the dry alligator weed dosage can reach up to14.5%of anthracite powder. When the water hyacinth and Jinling petroleum coke were used to prepare slurry fuel, the dry water hyacinth dosage can reach about6.54%of petroleum coke.In this paper, the pressurized gasification properties of biomass-CWS, prepared by water hyacinth and Guizhou anthracite, were investigated, it was analyzed that influence of reaction pressure(0.]-4MPa) to the gasification characteristics of the mixed fuel and CO2.Experiments show that, with the water hyacinth increasing in a weight ratio, the activation energy of coke gasification reaction with CO2reduced in high-temperature section, the gasification conversion rate increased in the same reaction time accordingly. At the same time, the maximum weight loss rate peak of coke gasification decreased and the peak time gradually moved forward.In this paper, the promotion mechanisms of lignin extracted from black liquor promoted coal-water slurry performance with high carbon powder extracted from fly ash were investigated. It is found that the lignin and high carbon powder had better slurrying properties. When adding lignin to1.7%of dry high carbon powder, the highest concentration of slurry was56.9%(shear rate of100S-1, the viscosity is934mPa.s); when adding lignin to8.6%of dry high carbon powder, the highest concentration of57.9%slurry (the viscosity is974mPa.s). The properties of scorification and pollutant emission of carbon water slurry were studied in3.2MW horizontal furnace, it is showed that carbon water slurry as a new renewable fuels in the boiler could achieve stable ignition and combustion, the maximum flame temperature was1200-1300℃.The slurrying and combustion properties of black liquor-CWS were investigated in the paper. The results showed that, cottonseed black liquor is superior to deionized water in preparing quality CWS with high concentration and low viscosity. The highest solid concentration of black liquor CWS is63.7%when apparent viscosity is1000mPa·s. It is because the cottonseed lignocellulose and organic compounds in black liquor can act as surfactants to improve CWS property. The surface tension of black liquor gradually decreases with increasing the solid biomass content in black liquor, which results in an increased solid concentration of black liquor CWS. The ignition temperature and activation energy of black liquor CWS are lower than those of pulverized coal. The reason is that abundant micropores in coal particles resulted from moisture evaporation in CWS facilitate O2diffusion and cottonseed biomass adhered to particle surfaces facilitates coal ignition. |
PDF Full Text Request