泡沫除尘器脱硫除尘性能试验研究

为实现脱硫除尘一体化,选用了泡沫除尘器进行模型试验,对塔体性能及液气比,塔速,筛板层数及筛孔,吸收液浓度等对脱硫除尘效率的影响进行了试验研究,得到了结构,运行和设计参数,为推广泡沫除尘器提供了依据。     

FSF三状态反吹风袋式除尘器的试验研究

本文介绍了 FSF 反吹风袋式除尘器的结构和性能试验结果.由于采用双层过滤,设备的平面布置密度和过滤段容积等指标均优于通常的圆袋除尘器.通过对比试验表明三状态清灰时,清灰彻底,阻力低,可节约能耗17%.此外该除尘器布置合理,结构紧凑.清灰机构简单,性能可靠,是一种有发展的除尘设备.     

大型袋式除尘器的开发与应用

本文介绍了大型袋式除尘器的设备组成，工作原理，滤料选择，电控设计及若干项新技术，文中详细阐述了新技术的内容，特点和在袋式除尘器上的应用情况，对大型袋式除尘器的推广应用有指导意义。     

基于袋除尘器技术的煤磨静电除尘器改造

随着抗结露和耐高温新型过滤材料、PTEF覆膜滤料的成功开发,袋除尘器在大多数工业领域完全能替代结构复杂,造价高的静电除尘器。文章通过袋除尘器技术改造煤磨静电除尘器的实例,介绍了改造方法、改造后的袋除尘器结构、技术参数及达到的实用效果。     

滤筒除尘器在玻璃行业的应用

通过滤筒除尘器和分箱脉冲式除尘器及回转反吹式除尘器的对比，阐述了滤筒除尘器在玻璃行业应用中的主要优势 。     

平旋流型除尘器能量损失的简易估计

能量损失是除尘器的重要性能指标之一。本文讨论了平旋流型除尘器内的气流运动，给出了一个估计平旋流型除尘器能量损失的简易方法－局部损失叠加法。     

LCPM型和LFDM型脉冲袋式除尘器

本文介绍了两种新型的脉冲袋式除尘器。     

新除尘器及旧除尘器改造后的开机

介绍了新除尘器投入使用前应做的工作 ,从新除尘器的开机准备、试车步骤、除尘器的运行维护等方面进行了论述 ,指出开机前进行设备的测试 ,对以后除尘机的稳定使用至关重要     

燃煤供热锅炉除尘器运行状况的调查分析

比较了各种供热锅炉除尘器的性能，调查并分析了除尘器的运行状况。     

静电旋风除尘器除尘机理的探讨

本文根据静电旋风除尘器的试验结果，从理论上分析了除尘器的除尘机理，初步得出除尘器捕集的粉尘粒子不是指数曲线，分级效率不是静电除尘器和旋风除尘器的线性组合等结论。     

分集水器的产品质量令人堪忧

本文叙述了目前我国分集水器等热水地暖用材料的市场状况,并就热水地暖系统中必须用的分集水器及其配件的产品质量加以评论。     

Experimental study on natural ventilation performance of one-sided wind catcher

Hydrodynamic performance of a one-sided wind catcher was investigated by experimental wind tunnel and smoke visualization testing. Wind catchers or what is called Baud-Geers in Persian language was a main component of buildings in central region of Iran and the neighboring countries. A Baud-Geer is a tower used to capture wind from external air stream and induce it into the building in order to provide natural ventilation and passive cooling. Due to geographical coordinates of the region, wind power and the direction of blowing wind, wind catchers are employed in different heights, cross sections of the air passages and the places and the number of the openings. The one-sided wind catcher has only one channel as a passage of induced air and is often related to the areas where there is prevailing wind. These Baud-Geers are employed to catch the wind blowing at higher elevations and direct it to the building, causing it to leave through windows, doors or other exhausted segments. In this study a 1:40 scale model of Kharmani's School Baud-Geer was employed and the induced air flow rate into the test room and the pressure coefficients around all surfaces of its channel were measured for different values of approaching air incident angles. Using measured pressure coefficients, the theoretical values of ventilation air flow were estimated to evaluate ability of simplified models in natural ventilation studies. Due to placing of urban full-scale wind catchers in the boundary layer of atmospheric winds, the effect of this phenomenon was also examined. The experiments were conducted when the wind catcher model with adjoining house was placed in the wake of upstream objects, resembling neighboring buildings. It was found that for an isolated wind catcher model, the maximum efficiency is achieved at zero air incident angle. Also it was concluded that the angle of incidence of the wind, the presence of an upstream building around the structure and blowing of atmospheric wind influence the pressure coefficients, the rate and the direction of ventilation air flow.     

两种新钻具在岩土工程勘察中的应用

结合工程实践,阐述了两种新钻具在岩土工程勘察中的应用,对钻具结构进行了介绍,归纳了这两种钻具的特点及优点,指出新钻具的应用保证了土工实验资料的可信度,有效提高了工程勘察的施工质量与实验质量。     

Effects of vernacular architecture structure on urban sustainability case study: Qeshm Island,Iran

The architecture of Qeshm Island includes the specific architectural style of a warm and wet area, which previously had a functional use aimed to reach a sustainable architecture and development. However, few studiesontheidentification ofthecharacteristicsofvernacular architecture and their roles in island stability have been performed. Thus, to understand the vernacular architecture of the island as a sustainable pattern, we discussed it separately in three aspects, namely, urban fabric, one-based architecture, and architectural details. To address our study, a part of the old fabric of the city with its existing buildings (42 buildings of 70 years of age) was selected and evaluated in a qualitative study. Results showed that in the scale of the urban fabric, factors, such as the structures of the buildings, the frame of the neighborhood spaces, and in terms of the architectural details, factors, such as bars, thickness of the walls, and the openings, are among the vernacular features of the area, playing an important role in the stability of Qeshm Island. In general, studies showed that vernacular architecture of the island has focused on developing an orientation between the climate of the region and a good understanding of the construction.     

Effizienzsteigerung von Textilbeton durch Einsatz textiler Bewehrungen nach dem erweiterten Nähwirkverfahren

Textilbeton ist ein neuer, effektiver und sehr innovativer Baustoff zur Verstärkung von Tragwerken. Im Rahmen der laufenden Forschung stehen die weitere Verbesserung des Verstärkungsverfahrens und die stetige Weiterentwicklung der Faser‐Matrix Kombination im Mittelpunkt der Untersuchungen. Aufgrund der hohen Garnzugfestigkeiten sind bei Verwendung textiler Bewehrungen aus Carbon sehr effektive Verstärkungen herstellbar. Bei ungünstiger Konfiguration der textilen Bewehrungen können jedoch verbund‐ und festigkeitsschädigende Rissbildungen innerhalb zugbeanspruchter Textilbetonbauteile auftreten. Diese Rissbildungseffekte werden in Abhängigkeit von der Belastung maßgeblich durch die wirkenden Verbundkräfte und die verarbeitungsbedingte Garnwelligkeit beeinflusst. Dabei ist die Gefahr eines Verbundversagens durch Delamination besonders in den Bereichen der Lasteinleitung in die textile Bewehrung, wie z. B. Endverankerungen und Übergreifungsstößen, kritisch. Dies führt zu einer Reduzierung der nutzbaren Zugtragfähigkeit der textilen Bewehrung im Gesamtbauteil. Um die Effizienz der textilen Bewehrung zu erhöhen, wurde daher ein verbessertes Textilherstellungsverfahren auf Basis der Nähwirktechnik entwickelt. Dadurch wird die ungünstig wirkende Garnwelligkeit deutlich reduziert. Der vorliegende Aufsatz beschreibt vergleichende Untersuchungen der Verbund‐ und Festigkeitseigenschaften zugbeanspruchter Textilbetonbauteile. Die Ergebnisse zeigen, dass mit der Entwicklung des erweiterten Nähwirkprozesses ein maßgeblicher Schritt im Hinblick auf eine weitere Verbesserung der Eigenschaften des Textilbetons erreicht werden konnte. Efficiency Increase of Textile Reinforced Concrete by Use of Textile Reinforcements from the Extended Warp Knitting Process The composite material textile reinforced concrete (TRC) is a new, effective and very innovative method for the strengthening of load bearing structures. Apart from further improvements to the strengthening methods, a continual further development of the fibre‐matrix combination is at the centre of ongoing research. Due to the high tensile strengths of textile reinforcements made of carbon, it enables very effective strengthening of concrete constructions. However, if the textile fabrics are unfavourably configured, bond and strength damaging crack formations within TRC members can occur. Depending on the load, these crack formation effects are substantially influenced by the bond and the size of yarn undulation, which depends on the processing of the fabric. The danger of bond failure by delamination, which particularly occurs in areas of concentrated load introduction into the textile reinforcement, such as final anchorages and overlaps, is especially critical. It results in a reduction of the usable tensile load bearing capacity in the entire member. For this reason, an improved textile manufacturing method based on warp knitting technology was developed. By means of this method, yarn undulation can be reduced considerably. The article on hand describes comparative examinations of the bond and strength properties of tensile loaded TRC elements. The results show that the development of the extended warp knitting process was a substantial step toward a further improvement of the properties of TRC.     

Feuchtesensoren in der Bauwerksüberwachung

Die Bestimmung des Wassergehalts und insbesondere der orts‐ und zeitabhängigen Feuchteverteilung in Baustoffen hat in der Forschung, Baustoffentwicklung, Bauwerksdiagnose und Bauwerksüberwachung einen besonderen Stellenwert. Bei der Untersuchung von Schadensursachen muss an Bauwerken in der Regel die Baustofffeuchte mit bewertet werden, da sowohl wesentliche Baustoffeigenschaften als auch die Dauerhaftigkeit von Bauwerken in entscheidendem Maße von deren Wassergehalt abhängig sind. In jüngster Zeit werden Feuchtesensoren eingesetzt, um die Funktionsfähigkeit und Dauerhaftigkeit von Instandsetzungs‐ bzw. Schutzmaßnahmen zu kontrollieren. Dies soll es dem Bauherrn ermöglichen, rechtzeitig Maßnahmen einleiten zu können, bevor Schäden infolge von Wasser‐ bzw. Chloridzutritt auftreten können. Condition Assessment with Moisture Sensors The determination of the water content in construction materials and in particular with regard to its depth and time dependent distribution is of high interest in the area of research, material development and condition assessment of structures. The assessment of the reason of damages mostly require to regard the moisture content of structures, because the moisture content basically affects material properties and the durability of structures. Recently moisture sensors have been used to control the functionality and durability of repair and protection measures. This enables the owner to carry out accurately timed measures to prevent damages due to the ingress of water and chlorides.