不同相态下co2管道输送方案研究环境工程专业论文.docxVIP

华北电力大学硕士学位论文摘要 华北电力大学硕士学位论文 摘要 碳捕集与封存技术(CCS)可以在不减少化石燃料利用量的基础上实现C02大 量减排。煤化工行业排放的C02气源浓度高、捕集成本低。C02提高原油采收率技 术(EOR)可以同时实现C02封存和油田增产。因此，以煤化工行业排放C02作为 EOR的C02气源可以在最大化降低捕集成本的基础上实现C02封存和油田增产， 具有重要意义。要实现大规模煤化工行业CCS．EOR首先需要解决C02的大规模输 送问题。管道输送是长距离、大规模C02输送最为经济、稳定的方式。 本文对陕北地区某煤化工行业捕集并用于油田增产的C02管道输送项目进行 研究，采用Hysys模拟软件对C02热力学特性进行模拟，确定了纯C02热力学特性 随温度压力变化规律及杂质对C02热力学特性影响。模拟了气源混合物热力学特性 参数及其变化规律，最终根据气源热力学特性、输送路线、C02输送量确定了5种 可行的相态输送方案：气态、低压液态、密相态、超临界、超临界一一密相态方案。 采用Hysys模拟软件对每种方案进行模拟，通过计算不同方案下各管径的单位能耗 及单位总成本，确定不同输送方案下的最优管径，最终确定超临界一一密相态管道 输送方案最为经济。基于超临界一一密相态输送方案进一步研究了管道入口压力、 管道入口温度和环境温度对C02输送的影响，确定了最优的设计参数。 关键词：C02；管道输送；相态；煤化工；EOR 万方数据 华北电力大学硕士学位论文Abstract 华北电力大学硕士学位论文 Abstract Carbon capture and storage technology(ccs)is an effective way to reduce C02 emission without cutting the fossil utilization．C02 produced by coal chemical industry has hi曲purity and low capturing cost，C02 enhanced oil recovery①OR) technology can improve oilfield production．Therefore，using C02 captured from coal．chemical industry as C02 source for EOR can reduce C02 emission with lowest cost and achieve oilfield production at the same time．To achieve large-scale coal chemical industry CCS-EOR application，the first to be solved problem is large—scale C02 transportation．Pipeline transportation is the most economical and stabilized way for long·-distance and large-·scale C02 delivery． In this paper,the main study focuses on C02 pipeline transportation scheme，C02 captured from coal chemical industry in ShaanXi province will be transported to oil field for enhancing oil production(EOR)through pipeline．The typical physical properties of C02 is simulated and analyzed to determine the variation of C02 physical properties and effects of impurities C02 physical properties through Hysys．Designing transportation scheme refer to C02 physical properties，flow rate and pipeline routes．Five pipeline transportation scheme is designed namely Gas phase transportation scheme，low pressure liquid phase transportation scheme，super critic