学士学位论文_设计年产12万吨杨木硫酸盐法浆碱回收分厂1重点燃烧工段.doc

摘 要 现代造纸企业通过碱回收新技术的应用，提高化学药品回收率和燃烧热效率，以减少对环境的污染。本设计特点是工艺成熟、稳定，设备先进且操作性和稳定性强，国内有关企业得到证实。 从蒸煮出来的黑液用鼓式置换洗浆机洗涤使黑液的提取率达到98%,燃烧工段的补充加入的芒硝为每吨风干浆补充纯度为90%的芒硝量为32㎏，碱回收率高达96.5%，自给率为100%，燃烧热效率68%。蒸发工段采用先进的黑液高浓结晶技术，使黑液由洗涤工段的17%升至72%，直接进炉燃烧，无须再蒸发，环保，节能。碱喷射炉采用单汽包无臭技术，采用大面积的省煤器，静电除尘率为98%，防止烟气二次污染。 通过碱回收新技术的应用，明显的提高了化学药品的回收率，减少了对环境的污染，并且对燃烧热量的回收，达到良好的环境效益，社会效益和经济效益。 关键词：碱回收；黑液高浓结晶技术；大面积省煤器。 Abstract The modern paper making business improve the new technical of the chemistry recovery reduce the environmental pollution through raising the chemicals recovery rate and hot efficiencies. This design，s characters is mature、stability, the equipments are rumrunners and operability and the stabilities are strong, the confirmation has been prove by the business enterprise. The black liquid withdraw the rate to attain with the drum type displacement from the black liquid that steam to boil out98%,In burning section the pure degree measures to 32 ㎏ for 90% long grass nitric, the chemistry recovery rate is up to 96.5%, the self-sufficient rate is 100%, the burnable hot efficiency 68%. In evaporation section, the black liquid from wash away dirt 17% of the work segment rises to 72%, direct enter stove combustion, need not to evaporate again, environmental protection and economize on energy. Static electricity in addition to the dust rate for 98%, keep smoke from annoys to pollute two times. Through the new technical application of the chemistry recovery, it has raised the recovery rate of the chemicals obviously, reduce the environmental pollution, and attain the good environment performance, social performance and economic performance. Keywords：The chemistry recovery; High and thick technique of black liquid; The saving coal machine of big areas . 目 录 第一章 总论 1 1.1 设计依据 1 1.2 设计范围 1 1.3 厂址选择说明 1 第二章 生产方法及生产流程论述 3 2.1生产方法论述 3 2.1.1 蒸发工段 3 2.1.2 燃烧工段 3 2.1.3 苛化工段 4 2.1.4 白泥回收工段 4 2.2 生产流程论述 5 2.2.1 蒸发工段 5 2.2.2 燃烧工段 6 2.2.3苛化工段 8 2.2.4白泥回收工段 8 第三章 物料平衡及热量衡算 9 3.1 蒸煮工