摘 要
新型组合式选粉机从功能上兼具粗粉分离器和选粉机性能，变系统气、料两路走为一路走，实现了简化系统的目的。本设计在机体的分级结构中将涡流分级、惯性分级、离心分级原理学科学地组合在一起，物料在选粉机内不同部位经过了几次不同方式的反复分选、清洗、分离彻底，且从结构上消除了风速梯度，保证了分选区气流场稳定，因而可以达到较高的选粉效率。其自带一组低阻高效旋风收尘器，可将80％的合格成品收集下来，大大减轻了下一级收尘器的处理压力和工作负荷，使系统的运转率更高，投资更省。而且采用下部进风的型式，使系统阻力更小，工艺布置更紧凑。
关键词：新型组合式选粉机、粗粉分离器、分级
Abstract
New Combined Separator has Thick Powder Separator simultaneously with Separator performance, changing systematic gas and material from two road into one, and have realized easier systematic purpose. It is designed in organism grade the structural eddy current of lieutenant general grade, inertia grade, centrifugation grade principle subject study land make up together. Stock in Separator different positions have passed the relapse of some of different waives grading, wash, split thorough. It has eliminated the gradient of wind speed just from structure, have guaranteed the grading district site of air current stability and may reach higher choose powder efficiency. Taking a group of low resistance efficient whirlwind receive dust ware. It will qualified finished product of 80% collect , also alleviate next a level receipt dust greatly the handling of ware pressure and working load, make systematic operation rate higher and make fewer investment. Meanwhile, it will enter the type of wind with bottom; so it will make systematic resistance less, technical arrangement more compacter.
Keywords: New Combined Separator Thick Powder Separator Grade
目 录
0 前言……………………………………………………………………………… 1
1 方案论证………………………………………………………………………… 2
1.1 选粉机分类…………………………………………………………………… 2
1.2 各类选粉机的特点…………………………………………………………… 2
1.3 总体结构方案确定…………………………………………………………… 5
1.4 总体设计参数………………………………………………………………… 8
1.5 方案社会价值………………………………………………………………… 10
2 结构设计………………………………………………………………………… 14
2.1 总体设计……………………………………………………………………… 14
2.2 分级部份结构设计…………………………………………………………… 16
3 结论……………………………………………………………………………… 21
参考文献………………………………………………………………………… 22
设计工作小结…………………………………………………………………… 23
附件清单………………………………………………………………………… 24
0 前言
在物料粉磨系统中，节能增产一直是人们努力的目标，而不断地提高粗细粉的分离效率和简化工艺流程，避免出现过粉磨而造成能源浪费，是提高选粉效率的有效途径。
自1885年英国人Mumford和Moody发明选粉机以来，至今已经历经了几次重大的变革，虽然最初的离心式选粉机经过多次的改进而仍在大量使用，但还是无法消除其存在的三个根本性缺点：
A. 循环气流中粉尘多，使选粉区内物料的实际浓度大，降低了系统的沉降率；
B. 选粉区内存在较大的风速梯度，使分离粒经不均，粗颗粒会被高速风带出；
C. 存在边壁效应问题，使细小颗粒随粗颗粒在此区域碰撞而同时降落
