天然气分输控制方案设计分析与优化

Design Analysis and Optimization of Natural Gas Distribution Control Scheme

摘要: 要实现天然气无人化自动分输，依靠简单的控制往往费时、费力、不易满足工艺过程要求，调节精度不高，存在天然气超输、少输，分输不稳定，分输中断等情况，无法满足下游供气需求。为解决这一问题，现以某集输工程外输装置天然气分输为例，结合正常工况和特殊工况，利用检测仪表、调节阀、安全切断阀，控制系统等手段，对分输管线进行分输控制方案设计和优化，对下游用户进行智能流量调配，并对输气管道采取安全联锁保护措施。工程运行结果表明：通过优化的控制方案，实现了分输管线压力和流量的自动调节控制，并保证了多路输气管道的连续、安全、平稳运行。无人化自动分输避免了人工频繁操作，提高了自动化水平，优化了劳动用工，降低了人工成本，提高了公司的智能化管理水平和生产效率，满足了下游用户的不同需求，为今后的天然气分输提供参考价值。

Abstract: To achieve unmanned automatic distribution of natural gas, relying on simple control is often time-consuming, laborious and difficult to meet the requirements of the process, the adjustment accuracy is not high, there are natural gas over-transportation, less transportation, unstable transportation, transportation interruption and other situations, can not meet the downstream gas supply demand. To solve this problem, Now, taking the natural gas distribution transportation of gas export unit of some gathering and transportation project as an example, combining normal and special process conditions, using detection instruments, regulating valves, safety and shutdown valves, control system and other means, the distribution control scheme of the distribution pipeline is designed and optimized, the intelligent flow allocation is carried out for downstream users, and the safety interlock protection measures are taken for the gas transmission pipeline. The results of the engineering operation show that the automatic control of pressure and flow is realized by optimizing the control scheme, and the continuous, safe, and stable operation of the multi-channel gas transmission pipeline is ensured. The unmanned automatic distribution avoids frequent manual operation, improves the level of automation, optimizes labor employment, reduces labor costs, improves the intelligent company’s management level and production efficiency, and meets the different needs of downstream users, it provides reference value for the future distribution of natural gas.