为进一步提高我国高原隧道建设水平,结合已建典型高原隧道工程案例,对近年来我国高原隧道制氧、供氧技术相关研究成果进行总结分析,并对其存在的不足及发展方向进行讨论。已有研究成果主要体现在: 1)变压吸附制氧工艺方法的改进完善、吸附剂的改良及小型便携式制氧装备的研发; 2)整体上形成了优化隧道施工通风方案+洞外变压吸附制氧+洞内弥散式供氧+个人携带氧气瓶供氧的通风制氧方案; 3)根据劳动等级,建立了针对隧道不同施工阶段的供氧量方案。目前仍存在的不足及发展方向主要包括: 1)开发新型高效吸附剂仍是高原隧道供氧技术发展的最重要的途径; 2)加强高原地区真实环境下工艺参数对制氧效率的影响及数学关系模型的研究; 3)关注隧道掌子面空气质量及氧气实际体积分数,进一步完善不同施工阶段人员氧气需求标准,加强隧道通风方案阶段化的科学设计; 4)进一步研发、推广高效电动型隧道施工装备。
关键词:
隧道; 高原; 制氧; 变压吸附; 供氧
To further improve the construction level of plateau
tunnel in China, the relevant researches of oxygen production and supply
technology for plateau tunnel in China are summarized and analyzed, and the
shortcomings and development direction are discussed by taking the typical
plateau tunnel cases for examples. The previous study results mainly include
(1) the improvement of pressure swing adsorption (PSA) oxygen production
process and adsorbent, the research and development of small portable oxygen
production equipment; (2) the ventilation and oxygen generation scheme for
plateau tunnel, i.e. optimized ventilation scheme, PSA oxygen generation
outside, dispersion oxygen supply inside and personal oxygen bottles; and (3)
the oxygen supply scheme for different construction stages of the tunnel
according to the labor grade. Presently, the shortcomings and development
directions mainly include (1) the development of new and efficient adsorbents for
oxygen industry; (2) the research on the influence of process parameters on
oxygen production efficiency and mathematical relationship model in the real
environment of plateau area; (3) determination of the air quality and actual
oxygen content in the tunnel face, improvement of oxygen demand standards for
personnel and the phased scientific design of tunnel ventilation scheme; and
(4) development and popularization of the high efficiency electric tunnel
construction equipment.