内蒙古某LNG项目脱碳单元参数优化
Parameters Optimization of C02 Removal Unit of Certain LNG Project in Inner Mongolia
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- 引用格式:
-
曾,桃,王海洋.内蒙古某LNG项目脱碳单元参数优化[J].天然气与石油,2015,33(6):0.doi:
Zeng Tao, Wang Haiyang.Parameters Optimization of C02 Removal Unit of Certain LNG Project in Inner Mongolia[J].Natural Gas and Oil,2015,33(6):0.doi:
- DOI:
- 作者:
- 曾 桃 王海洋
Zeng Tao, Wang Haiyang
- 作者单位:
- 重庆耐德工业股份有限公司
Chongqing Endurance Industry Stock Co., Ltd.,
- 关键词:
- 液化天然气；脱碳；净化工艺；优化；工艺参数
LNG; C02 removal; Purification technology; Optimization; Process parameters
- 摘要:
- 内蒙古某LNG项目脱碳采用混合醇胺法净化工艺，在实际运行中原料气的组分偏离设计工况较多。为了优化本项目脱碳单元的工艺参数，使净化后的天然气中CO2含量低于50×10-6，考察了LNG工厂的运行数据，并分析了操作压力、操作温度、贫液循环量、残余酸气负荷等重要工艺参数对脱碳装置的影响。参数调整后，天然气进入吸收塔的操作压力由设计值6.3 MPa降低到5.8 MPa，贫液循环量由15 m3/h减少到13 m3/h，可使天然气压缩机的轴功率减少37 kW，再沸器的能耗降低约13 ，对混合醇胺法净化工艺的设计具有指导意义。
Adopted is such purification process as mixed alcohol amines method for decarburization of a liquefied natural gas project in Inner Mongolia. In the actual operation, composition of feed gas diverges greatly from design conditions. In order to optimize process parameters of the decarbonization unit and make the carbon dioxide content in purified gas be less than 50×10-6, gathered are the operational data of the LNG plant and analyzed are the effects of such important process parameters as operating pressure and temperature, amine circulation rate and acid gas load on the C02 removal unit. After adjusting the parameters of feed gas into absorption tower, the operating pressure is reduced from 6.3MPa to 5.8MPa, lean amine circulation rate is reduced from 15m3/h to 13m3/h. Accordingly, the shaft power of gas compressor is reduced by 37kW and the energy consumption of reboiler is reduced by about 13%, which has directive significance for other similar mixed amine method purification process designs.
