Determination of the gas compositions for direct coal liquefaction by gas chromatography

Via multi-dimensional gas chromatography, configured with parallel dual-channel, double detectors, valves switching and back flushing, rapid analysis of the gas compositions consisting of C1-C5 hydrocarbons and permanent gases, such as CO2, H2S, H2, and CO, for direct coal liquefaction has been realized. With four packed chromatographic columns, which are Hayesep-Q pre-column, Hayesep-Q column, molecular sieve 5A column and one PLOT A1203 S capillary column, the gas compositions for direct coal liquefaction are analyzed qualitatively and quantitatively by the external standard method. The determination method has such advantages as excellent separation, simple operation, rapid analysis and accurate results.

核电站人员闸门传动机构的方案设计

第三代核电站安全壳人员闸门传动机构是保证人员闸门正常开关门、密封等功能的重要部件。引进国外的技术,唯独不含传动机构,只能自行设计。根据上游提供的有关参数,研究传动机构的结构、机械原理和动作流程,为计算书和工作总图的设计提供依据。在研究的过程中既要避开国内、外同行业厂家的专利,又要符合接口和功能要求。通过运用常用机械结构、机械原理,经合理组合后,完全能满足设计要求。