文档介绍：
建筑给排水
谈真空排水系统中的气液比及其与能耗的关系
李
旻
周敬宣
温兴锁
( 华中科技大学环境科学与工程学院, 武汉
430074)

摘要
简述了真空排水系统中气液比的概念。分别说明了室内及室外真空排水系统中气液比
的取值范围和选取原则。指出真空排水管网水力设计的最大制约因素在于压力。阐述了气液比对
管道压损的作用机理。气液比既是确定真空泵所需抽气量的重要参数, 又影响真空泵的能耗。对真
空排水系统的能耗做了理论分析, 对室内和室外系统的能耗做了推算和比较。
关键词
真空排水系统
气液比
压力损失
真空泵
能耗
Gas
liquid ratio and its relationship with energy
consumption in vacuum sewerage system
Li M in, Zhou Jingxuan, Wen Xingsuo
( College of E nvironmental Science & Engineering , H uaz hong Univ er sity
of S cience and T echnolog y , Wuhan 430074 , China)
Abstract: T he co ncept of gas
liquid ratio in v acuum sew erage system and value rang e and
selection pr inciples of the g as
liquid ratios of indoor and o utdo or vacuum sew erage system w ere
presented in this paper. It w as pointed o ut that the primary restrictive facto r the vacuum sew age
w ork hydraulic desig n w as pressure. T he mechanism of gas
liquid on pipe pressure
losses w as dem onstrated. Gas
liquid w as the key param eter to determine the sucking rate of the
vacuum pum p and had affects on energy co nsum ption of v acuum pump. The theor etical analysis of
vacuum sew erage system energy consumption, the indo or and outdo or sy stem energy consumption
w ere also calculated pared.
Keywords: Vacuum sew erage system; Gas
liquid ratio; Pressure loss; Vacuum pump; Energy
consumption
0
前言的。气液比过低会造成输送不畅, 污水不能及时排