12021202 译文 gt - 7569水合物抑制剂降低运营成本50%,消除甲醇胺系统的污染

爱默琰旎

石工12 级5班   赵雪   12021202   油层物理
译文
性能报告:gt - 7569水合物抑制剂降低运营成本50%,消除甲醇胺系统的污染
挑战:一条天然气管道运输平均2430 e3m3 / d的天然气到一座胺工厂。管道位于阿尔伯达省的偏远地区，由于地形多变，铺设管道非常困难。当产生的大多数水在压缩机站后进入管道时，生产水在整个系统的不同位置引入管道。在从压缩机站到天然气厂的管线中，为防止水合物的形成，用4000 L的甲醇进行处理。虽然甲醇可以有效地防止水合物进入胺工厂,但是它污染回流水,并增加系统的腐蚀风险。客户一直在努力降低甲醇进入管道的体积而不是水合物的形成。
解决方案: M-I SWACO介绍的水合物抑制剂项目使用动力学水合物抑制剂(KHI)gt - 7569。。检查清管器的返回物以确定水合物晶体是否存在；在管道入口处监控压力，因为任何减少都表明有水合物形成。KHI优化后，以每天700升的速度注入就没有任何水合物形成。通过试验分析，证明回流水没有受到污染。使用KHI的客户能够节省50%以上的化学药品和运营的成本。
结果:以前，每天注入1500升KHI或大约40%的甲醇，压缩机站到天然气工厂的管道每周清理两次, 清管器的返回物也要用以检查水合物晶体是否形成，气体设备进口处的压力也要进行监控。进口处压力的减少表明有水合物形成。如果在管道的第一次清理和第二次清理之间没有发现（水合物的）晶体，(相隔~ 6天)KHI的用量可减少到每天1000升。这是维持两个清管周期(12天)以及清管器的返回物和管路压力监控的费用。M-I SWACO推荐将费用减少到每天800升。优化后的KHI注入率一直减少到每天700升的速度都没有水合物晶体形成,也没有进口压力的减小和回流水的污染。
水合物抑制剂项目的施行使运营成本减少了50%。回流水污染的问题以及与甲醇相关的腐蚀问题和甲醇流入胺工厂的问题也解决了。这个项目已经从最初的每天1500升的注入速率优化到了每天700升。用于防止水合物形成的化学药品的用量也已经减少了80%以上。
原文
Performance Report: GT-7569 Hydrate Inhibitor Reduces Operational Costs by 50% and Eliminates Methanol Contamination in Amine System
Challenge: A gas pipeline transports an average of 2,430 e3m3/d of gas to an amine plant. The pipeline is located in remote part of Alberta and access is difficult due to the changing terrain. Produced water is introduced into the pipeline at various locations throughout the system with the majority of produced water entering the pipeline after a compressor station. The line from the compressor station to the gas plant is treated with 4,000 L of methanol to prevent hydrates. Although the methanol is effective at preventing hydrates it carries into the amine plant, contaminating the reflux water and increases the corrosion risk to the system. The customer has tried to reduce the volume of methanol entering the pipeline but hydrates form as a result.

Solution: M-I SWACO introduced a hydrate inhibitor program using the kinetic hydrate inhibitor (KHI) GT-7569. The KHI was initially applied at 1,500 liters per day or approximately 40% of the methanol injection. Pig returns were checked for the presence of hydrate crystals and in the inlet pipeline pressure was monitored for any reduction indicating hydrate formation. The KHI was optimized to an injection rate of 700 liters per day without any hydrate formation. The reflux water was analyzed through the trial and showed no contamination. As a result of the KHI application the customer was able to save over 50% in chemical and operational costs.

Result: The KHI was initially applied at 1,500 liters per day or approximately 40% of the methanol injection. The pipeline from the compressor station to the gas plant was pigged twice a week and the pig returns were checked for hydrate crystals. The pressure on the inlet of the gas plant was also monitored. A decrease in the inlet pressure signaled the formation of hydrates. When no crystals were found between the initial pig run and the second pig run (~6 days difference) the KHI was reduced to 1000 liters per day. This was rate maintained for two pigging cycles (12 days) and pig returns and line pressure were monitored. The rate was reduced to 800 liters per day, which was the rate recommended by M-I SWACO. Optimization of the KHI injection rates continued until a rate of 700 liters per day was achieved without any hydrate crystals, no reduction in inlet pressure and no contamination of the reflux water.

Operational costs have been reduced by over 50% since the implementation of the kinetic hydrate inhibitor program. Contamination of the reflux water has been eliminated and corrosion concerns associated with methanol carryover into the amine plant have been resolved. The program has been optimized from an initial injection rate of 1,500 liters per day to 700 liters per day. The volume of chemical required to prevent hydrates have been reduced by over 80%.