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为了解决液态二氧化碳地面气化后借助矿井现有管路将气体从井上至井下远距离输送后能否顺利排放的问题,构建了由低温液体储罐、气化器和调压稳压装置及其配套的管阀等组成的非增压型地面固定式二氧化碳气体集中供应系统。基于简单管路内流体的能量损失具有加和性的技术原理,建立数学模型,综合了沿程损失,管道入口、弯管和阀门的局部阻力等多种因素,进行了流体力学相关计算,得出并对比分析了将气体自身压力作为动力的有用功与输送过程中的总阻力,证明了当管路长度不超过5 km,总阻力不超过3.539×105 J/kg,其末端气体能够顺利排放至井下火区密闭空间,保证其输送可行性的最大管路长度不低于19 km。
In order to solve the problem of whether the liquid carbon dioxide can be smoothly discharged after being gasified from the ground up to the underground via the existing pipeline of the liquid carbon dioxide after ground gasification in liquid mines, a cryogenic liquid storage tank, a gasifier, Supporting the valve composed of non-pressurized ground-based fixed carbon dioxide gas supply system. Based on the principle of additivity of the energy loss of fluid in a simple pipeline, a mathematical model was established, and the fluid mechanics related calculation was carried out by combining various factors such as the loss along the pipeline, the pipe entrance, the local resistance of the elbow pipe and the valve A comparison of the useful work using gas’s own pressure as a driving force and the total resistance in the process of transportation shows that when the pipeline length does not exceed 5 km and the total resistance does not exceed 3.539 × 105 J / kg, the end gas can be discharged smoothly To the confined space of the underground fire area, to ensure the feasibility of its maximum pipeline length of not less than 19 km.