水平进给清洗机设刮与试验结果分析

针对原C形管清洗机只能弧形进给,清洗靶距不均匀,设计一凸轮限位装置。c形管在电机驱动下进给,同时在滚轮和限位板作用下绕着中心点旋转,实现三维清洗喷头在罐车中心线附件进给。在独山子石化公司和呼和浩特石化公司试验结果表明,水平进给清洗机比c形管弧形进给清洗机清洗靶距小,清洗纹络均匀,清洗用水减少20％,清洗效果高。     

Demonstration of performance enhanced pre-spectrum sliced seed light for low-cost seeded WDM–PON architecture

We proposed and demonstrated high efficient pre-spectrum sliced seed lights (PS-SL) for serving low-cost seeded wavelength division multiplexing passive optical network (WDM–PON). The PS-SLs reused backward amplified spontaneous emission light which were generated by an Erbium doped fiber amplifier (EDFA) to improve output characteristics. The power, flatness and bandwidth of seed signal from the proposed PS-SL were sufficient to serve multiple seeded WDM–PON OLTs. We experimentally demonstrated the feasibility of the PS-SL with multiple seeded WDM–PONs over 20 km transmission. In addition, the PS-SL was tolerated to these ranges of environmental conditions since no data error was observed after 48 h. We anticipated a considerable reduction in the seed light cost per channel for multiple WDM–PONs because the seed light cost was shared by multiple WDM–PON OLTs.     

膜生物反应器处理油脂废水的研究

采用膜生物反应器对油脂废水进行强化处理.试验结果表明:膜生物反应器对油脂废水中的化学需氧量(COD)、油、总有机碳(TOC)、氨氮和生化需氧量(BOD5)的平均去除率分别为85.2％、93.8％、88.4％、51.3％和97.5％,相应的平均出水含量为233.6、310.1、95.7、3.9 mg/L和22.6 mg/L;氨氮和BOD5达到国家污水综合排放一级标准(GB 18918-2002).在考察膜通量对膜污染的潜势中发现,随着膜通量的提高,跨膜压差(TMP)增加的较快,通过将膜通量降低到8 LMH以下,TMP得以稳定,维持在2～6 kPa之间.     

高静压处理对花生蛋白的改性研究

研究高静压(300 MPa～600 MPa)处理对花生分离蛋白、花生球蛋白的溶解性、乳化性(EAI)、乳化稳定性(ESI)、表面疏水性、巯基含量等性质的影响,并对各功能性质的相互关联性进行了分析。结果表明:高静压处理可有效的改善花生分离蛋白和花生球蛋白的溶解性和乳化性,但是会降低其乳化稳定性。在400 MPa,花生分离蛋白具有最大的乳化性和表面疏水性,花生球蛋白具有最大的溶解性。在500 MPa,花生球蛋白具有最大的乳化性和表面疏水性,花生分离蛋白具有最大的溶解性;随着压力的升高,花生球蛋白和花生分离蛋白的游离巯基含量呈下降趋势。表面疏水性与乳化性存在一定的正相关。结果表明,高静压处理可以有效改善花生蛋白的功能性质。     

Comparative studies on the functional properties of various protein concentrate preparations of peanut protein

The effect of different preparations on the functional properties of peanut protein concentrates was studied. Peanut protein concentrates were isolated from defatted peanut flour by isoelectric precipitation, alcohol precipitation, isoelectric precipitation combined with alcohol precipitation, alkali solution with isoelectric precipitation and their functional properties (protein solubility, water holding/oil binding capacity, emulsifying capacity and stability, foaming capacity and rheology) were evaluated. The results showed that the protein solubility, foaming capacity and stability of protein prepared by alkali solution with isoelectric precipitation were the best of all the peanut protein products. But the protein prepared by alcohol precipitation had better water holding/oil binding capacity, which was significantly different from other protein products. The emulsifying stability of protein concentrate prepared by different methods was significantly lower than that of defatted protein flour. The protein prepared by isoelectric precipitation and isoelectric precipitation combined with alcohol precipitation had better gel properties which indicated that they were a potential food ingredient.     

A comparative investigation on the corrosion degradation of plasma sprayed YSZ and LnMgAl11O19 (Ln = Nd,Sm, Gd) coatings exposed to the molten V2O5 + Na2SO4 salt mixture at 1100 °C

Corrosive attack of the molten 50 wt. % V₂O₅ + 50 wt.% Na₂SO₄ salt mixture has been comparably studied for the APS YSZ and LnMgAl₁₁O₁₉ (LnMA, Ln = Nd, Sm, Gd) thermal barrier coatings upon a 10 h anneal at 1100 °C in air. The YSZ coating suffered from a deepest infiltration of the molten salt along its thickness direction through the open and connected pores as well as inter-lamellae microcracks. A large number of newly formed voids were widely distributed in the YSZ coating due to the corrosion degradation followed by the t, t’ to m-ZrO₂ phase transformation. While, a relative thin corrosion layer mainly consisting of α-Al₂O₃ and LnVO₄ were present for the corroded LnMA coatings. The much reduced number of open pores and connected microcracks together with the rapid chemical reaction between the molten salt and LnMA coatings, especially for the NdMA coating, preventing further infiltration of the molten salt, was beneficial to mitigate further attacks to the inner coating at the expense of sacrificing a thinner top layer. The presences of amorphous phases were thought to further accelerate the corrosion reaction and strengthen such a corrosion protection mode for all the APS LnMA coatings.     

High temperature fracture toughness and residual stress in thermal barrier coatings evaluated by an in-situ indentation method

High temperature fracture toughness and residual stress are important for the evaluation of TBCs. In this paper, an in-situ high temperature indentation method was originally developed to investigate the high temperature fracture toughness and residual stress in a typical TBC, nanostructured 8?wt% yttria partially stabilized zirconia (YSZ) coating. The cracks caused by in-situ high temperature indentation tests were observed, and high temperature fracture toughness and residual stress were experimentally measured. The fracture toughness was measured to be 1.25, 0.91 and 0.75?MPa*m^1/2 at 25, 800 and 1000?°C, respectively. The residual stress was measured to be ? 131.3, ? 55.5 and ? 45.5?MPa, correspondingly. Moreover, the residual stress and fracture toughness both decrease with increasing environmental temperature. It is also found that the fracture toughness without consideration of residual stress is significantly larger than the intrinsic fracture toughness, which may result from the compressive stress state.     

基于PIC18F4580的粮食称重系统设计

在粮食品质检测分级过程中,为了测量样品的含杂率和容积密度,设计了一种高精度称重系统。以PIC18F4580为主控单元,采用四臂电桥式负荷传感器,用AD7799进行模数转换及传感器微弱信号的放大。差动式输入参考电压减小电源低频漂移时带来的系统误差。实际测试表明,系统测量重复误差不超过0.005%,系统非线性度误差小于0.007%,可以满足粮食检测过程的需求。     

一种热喷涂雷达吸波涂层制备技术

采用耐温的磷酸盐玻璃和改性的β–SiC吸收剂的热喷涂材料体系,使用火焰喷涂工艺制备了热喷涂雷达吸波涂层,对粉末、涂层制备过程及性能进行了研究,结果表明:喷雾干燥造粒是制备热喷涂雷达吸波涂层粉末材料体系的合理方法,使用火焰喷涂制备的涂层,吸收剂含量为20%时,涂层性能最佳,当涂层厚度为1 mm时,在1.2×1010～1.8×1010 Hz范围内,涂层反射率均低于-8 dB。     

中国部分主产区葡萄酒中铜含量分析

以我国四个主要产区贺兰山东麓产区、河西走廊产区、怀涿盆地产区和通化产区国产葡萄酒为样本,采用电感耦合等离子体质谱法测定铜含量,分析我国国产葡萄酒中铜含量状况。结果表明我国葡萄酒中铜含量状况整体良好,铜超标检出率为0.2%。在四个产区中,通化产区葡萄酒铜含量最高,其次为贺兰山东麓产区,河西走廊产区和怀涿盆地产区较低。通化产区葡萄酒中铜含量呈两极化分布,贺兰山东麓产区样品铜含量则集中分布在50~100μg/L和100~300μg/L两个区段,而河西走廊与怀涿盆地两个产区的铜含量分布较为平均。分析显示,气候风土特征、酒庄葡萄园管理手段与酿造技术对葡萄酒中的铜含量的影响很大。葡萄品种在同一产区不同酒庄中的表现是类似的,但受产地风土与气候条件影响,在不同产地表现又有一定的区别。年份对于铜含量也有一定的影响,主要与当年的气候尤其是降水情况相关。