市政污泥掺混半焦粉成型影响因素的实验研究

摘要

在市政污泥和半焦粉成型过程中，为了研究各因素对成型效果的影响，以达到在较少黏结剂添加量的条件下，制备出强度和热值都较高的型煤，开展了市政污泥掺混半焦粉成型因素影响的实验研究。在实验室条件下，以褐煤半焦粉为基本原料，通过添加不同比例的市政污泥和黏结剂，同时调节成型压力，利用压力试验机进行压球并测其强度。在实验过程中，通过对各因素进行优化，得出了污泥半焦粉成型的最佳工艺。结果表明：在黏结剂添加量为2.0％，污泥添加量为20％，成型压力为35 kN的条件下，制得了发热量在22 MJ／kg以上的污泥半焦型煤，为市政污泥的高效清洁利用提供了新途径。%In order to study the impact of various factors on briquetting effect and prepare coal briquette with higher strength and calorificvalue using less binder in the process of municipal sludge and semi-coke powder briquetting,the study was conducted by briquetting factorsexperiments.Under laboratory conditions,as the basic raw material,the lignite semi-coke powder mixed with municipal sludge andbinder,was applied to the briquetting experiment by using the pressure testing machine and the tester to pressure the strength of coal briquette,while adding different proportions of municipal sludge and binder,adjusting the molding pressure.During the experiment,the optimumprocess of sludge and semi-coke powder briquetting was obtained by optimizing various factors.The results showed that,underthe conditions of briquetting pressure of 35 kN,the binder addition level of 2.0%,and the sludge amount of 20%,the sludge semi-cokebriquette with above 22 MJ/kg calorific value was produced,which provided a new way for high efficiency and cleaning treatment of municipalsludge.