| abstract |
A coal-fired boiler spiral-flow ceramic nozzle and a preparation method thereof are provided, wherein the nozzle comprises a main body, a spiral groove is arranged in the main body, and the spiral groove extends spirally on the inner wall of the main body; the main body comprises, by weight, 20-30 parts of gibbsite, 16-25 parts of magnesia-alumina spinel, 20-30 parts of kaolin, 5-10 parts of coal cinder, 4-8 parts of illite, 4-8 parts of calcite, 1-3 parts of methyl cellulose and 5-7 parts of carbon fiber. The invention enables the airflow to gradually rotate in the process of moving from the air inlet end to the air outlet end in the main body, and finally the airflow is ejected from the air outlet end in a spiral airflow state, changes the forms of air supply and air distribution of the hearth in the prior art, and plays a better impact stirring role on the wind field in the hearth, thereby not only enabling the wind field to be more uniform, but also increasing the contact and reaction time of oxygen and coal, carbon dioxide and coal, carbon monoxide and oxygen and other gases, improving the utilization rate of carbon dioxide and coal, and effectively reducing the emission of smoke dust, carbon dioxide and other emissions. |