In the thesis,the principle of vacuum creating in pre-coated mud filter is explained,the problems existed in the vacuum system design are analyzed.

• 阐述了预挂过滤机真空形成的原理,分析了在真空系统设计中存在的问题,提出了通过利用滤液排出管形成的水腿效应来改进和优化真空系统设计的意见。