高效填料介绍

1 前言 随着现代化工、石油化工生产的发展,对蒸馏、吸收等塔设备提出了新的要求,生产能力大,压力降低,传质效率高的分离技术,可为生产化工及石油化工产品带来巨大的经济效益。本文拟对国内外应用甚广的蒸馏塔,尤其是填料塔内的各种高效填料近年来的技术进展,作扼要介绍。 蒸馏塔分为板式塔和填料塔二大类。板式塔有泡罩塔,筛板塔、浮阀塔、浮舌塔和浮动喷射塔等,填料塔有各种散堆填料塔和规整填料塔。七十年代之前。

后装式压缩垃圾车有限元分析及优化设计

利用ANSYS软件对后装式压缩垃圾车的车厢及填料器结构进行有限元分析,在此基础上对原矩形截面车厢进行改进,给出分段弧线截面车厢结构构型。再运用结构优化导重法对车厢与填料器结构构件尺寸进行优化设计,达到了改善结构应力分布,有效降低整车重量的预期目标。

后装式垃圾车装载压缩机构专利技术发展综述

后装式垃圾车的装载压缩机构主要由液压系统、车厢、压缩机构以及控制系统和底盘组成。本文针对后装式垃圾车的装载压缩机构,对现有专利技术进行了归纳和分类,分析了整体演进路线,并着重分析了各年代代表性专利技术。

釉面瓦干压成型工艺研究与试制

从干压平瓦熟坯层裂现象及检测分析其对应生坯各区密实度入手,分析了坯体及其对应熟坯层裂的必然原因,提出了坯体各部非等密实度是造成坯体素烧层裂的必然因素。实现非等静压的干压成型工艺生产等密实度瓦坯体的必要条件是实现模套内等厚填料这一理论。对瓦形局部进行改造,制作了能进行等厚填料的干压瓦新型模具及新型填料器。

High-Thermal Conductive Coating Used on Metal Heat Exchanger

Based on modified silicon polyester resin in addition to several functional fillers such as corrosion-resistant fillers, heat-resistant fillers and thermal conductive fillers, a high thermal conductive coating can be made. On the basis of boronnitride(BN) and aluminum nitride(AIN) used as thermal conductive fillers and by means of the testing system of hot disk and heat transfer experiment, researches on the varieties of thermal conductive fillers and the effects of the contents of high-thermal conductive coating have been done, which shows that the thermal conductivity of coating increases with the increase of the quality fraction and the coefficient of thermal conductivity of the thermal conductive fillers of coating. With guaranteeing better heat resistance, stronger corrosion resistance and adhesive force, the coefficient of coating can reach a level as high as 3 W·m-1·K-1.

An Experimental Study on the Response of Model Footings Resting on Reinforced Flyash Beds under Repeated Load

In the present, investigation an attempt has been made to study the behavior of reinforced flyash beds under repeated loads by conducting carefully designed experiments. The main objective of the experiments conducted is to evaluate the beneficial effects of using flyash as a backfill material in the reinforced beds to resist the repeated loads. As no unique standard equipment is available for the application of repeated loads and to measure the response, different researchers have designed and fabricated different types of equipments for the testing. The repeated load of known intensity with waveform type and frequency is applied on the surface and embedded footing in unreinforced and reinforced flyash beds. The response of the flyash beds, in the form of settlement is measured using linear variable differential transducers. The experimental results clearly demonstrated that the provision of reinforcement in the flyash beds is effective in improving the performance of both surface and embedded footing under repeated loads.

One-pot ball-milling preparation of graphene/carbon black aqueous inks for highly conductive and flexible printed electronics

Stable aqueous carbon inks,with graphene sheets(GSs)and carbon black(CB)as conductive fillers,are prepared by a simple one-pot ball-milling method.The asprepared composite ink with 10 wt%GSs shows optimized rheological properties(viscosity and thixotropy)for screen printing.The as-printed coatings based on the above ink are uniform and dense on a polyimide substrate,and exhibit a sandwich-type conductive three dimensional network at the microscale.The resistivity of the typical composite coating is as low as 0.23±0.01Ωcm(92±4Ωsq^-1,25μm),which is 30%as that of a pure CB coating(0.77±0.01Ωcm).It is noteworthy that the resistivity decreases to 0.18±0.01Ωcm(72±4Ωsq^-1,25μm)after a further rolling compression.The coating exhibits good mechanical flexibility,and the resistance slightly increases by 12%after 3000 bending cycles.With the CB/GSs composite coatings as a flexible conductor,fascinating luminescent bookmarks and membrane switches were fabricated,demonstrating the tremendous potential of these coatings in the commercial production of flexible electronics and devices.