欠平衡钻井浮力撇油装置的设计与应用

撇油装置是欠平衡钻井配套装备的关键设备 ,其作用是将井筒循环出来的原油与钻井液分离 ,恢复钻井液性能 ,保持钻井正常施工。自行设计的浮力撇油装置能有效地将原油与钻井液分离 ,及时排出分离出的原油 ;经过撇油后的钻井液 ,其性能良好 ,能安全、可靠地实施欠平衡钻井施工。两级漫流与二次分离独具特色 ,通过浮子选配来适应不同钻井液密度 ,特殊的循环系统保证了撇油室液面的相对稳定。浮力撇油装置的输入电源为三相 380V/5 0Hz ,输入功率 70kW ,最大处理量 2 0 0m3/h。模拟试验和现场应用表明 ,该浮力撇油装置使用效果良好 ,能满足欠平衡钻井施工的要求     

小麦制粉工艺测定的组织与程序

本文结合测定实例就小麦制粉工艺测定的组织形式、实旅程序、项目衔接、数据统计方式等内容进行了详尽地阐述。它对于各种类型的面粉厂制粉工艺测定具有技术指导作用。     

Microchip capillary electrophoresis with solid-state electrochemiluminescence detector

We report microchip capillary electrophoresis (CE) coupling to a solid-state electrochemiluminescence (ECL) detector. The solid-state ECL detector was fabricated by immobilizing tris(2,2'-bipyridyl)ruthenium(II) (TBR) into an Eastman AQ55D-silica-carbon nanotube composite thin film on an indium tin oxide (ITO) electrode. After being made by a photolithographic method, the surface of the ITO electrode was coated with a thin composite film through a micromolding in capillary (MIMIC) technique using a poly(dimethylsiloxane) (PDMS) microchannel with the same pattern as an ITO electrode. Then the TBR was immobilized via ion exchange by immersing the ITO electrode containing the thin film in TBR aqueous solution. The whole system was built by reversibly sealing the TBR-modified ITO electrode plate with a PDMS layer containing electrophoresis microchannels. The results indicated that the present solid-state ECL detector displayed good durability and stability in the microchip CE-ECL system. Proline was selected to perform the microchip device with a limit of detection of 2 microM (S/N=3) and a linear range from 25 to 1000 microM. Compared with the CE-ECL of TBR in aqueous solution, while the CE microchip with solid-state ECL detector system gave the same sensitivity of analysis, a much lower TBR consumption and a high integration of the whole system were obtained. The present system was also used for medicine analysis.     

恒电位阴极极化法评价阻垢剂性能试验条件的优化

以电厂凝汽器最常用的304不锈钢为试样,确定恒电位阴极极化法评定阻垢剂性能的主要影响因素。结果表明:主要影响因素依次为极化电位、成垢离子浓度、极化时间、温度。优化后的试验条件为:极化电压-1.040V、CaCl2浓度9.0mmol/L、NaHCO3浓度18.0mmol/L、极化时间4.0h和反应温度45.0℃。试验条件优化后可使阻垢率的测定相对误差降低42%,分辨率明显提高。     

Silicon lithium-ion battery anode with enhanced performance: Multiple effects of silver nanoparticles

Silicon has been regarded as one of the most promising next generation lithium-ion battery anode. However, the poor cyclic stability of the Si based anode has severely limited its practical applications, which is even worse with high mass loading density (>1?mg?cm^?2). A new concept has been developed to enhance the electrochemical performance of the Si nanoparticle anode. Silver nanoparticles are composited with the silicon nanoparticles in a facile way for the first time. It is found that the mechanical properties of the Si electrode have been significantly improved by the incorporation of the silver nanoparticles, leading to enhanced cyclic performance. With the Si/Ag mass ratio of 4:1, the reversible specific discharge capacity is retained as 1156?mA?h?g^?1 after 100 cycles at 200?mA?g^?1, which is more than three times higher than that of the bare silicon (318?mA?h?g^?1). The rate performance has been effectively improved as well due to excellent electron conductivity of the silver nanoparticles.     

山梨酸乙酯制备方法及其应用

介绍一种新型的精细化工产品山梨酸乙酯的合成及在食品、畜牧业、农林业的应用。     

8～18GHz双刀双掷开关研究

采用混合集成电路的方法,用ＰＩＮ管芯制作了８～１８ＧＨｚ双刀双掷开关。开关采用管芯全并联结构。反射式ＤＰＤＴ开关插损≤２．０ｄＢ,隔离度＞５９ｄＢ,开态驻波比≤１．６５,承受功率为连续波５Ｗ。吸收式ＤＰＤＴ开关插损≤２．９ｄＢ,隔离度＞５８ｄＢ,开态与全关断态驻波比≤２．１,承受功率连续波２Ｗ。电路由ＴＴＬ信号控制。     

一托梁的劲性砼加固

在上部荷载较大的情况下,采用劲性砼对原梁进行了托换,同时将剪摩擦理论运用于牛腿的设计中,取得了较好的效果。     

餐厨垃圾微生物发酵生产蛋白饲料的工艺优化

以餐厨垃圾为原料,采用酵母菌、黑曲霉和枯草芽孢杆菌作为混合发酵菌剂进行固态发酵,结合正交试验,建立并优化了餐厨垃圾转化为生物活性蛋白饲料的工艺条件。结果表明,最佳发酵工艺为以酿酒酵母∶枯草芽孢杆菌∶黑曲霉（1∶1∶2）为混合菌剂,接种量1.0%,尿素添加量1.0%,30 ℃发酵48 h,含水量60%,在此发酵条件下发酵产物中粗蛋白含量提高了58.7%;粗纤维、粗淀粉和粗灰分含量均显示下降;氨基酸总含量增加了1.08倍,其中必需氨基酸含量提高了95.9%;维生素B1、B2的含量也有显著提高;微生物指标均符合国家饲料卫生标准（GB/T 5009.23-2006）。