袋式除尘器应用中的高温技术措施

在袋式除尘器应用中经常遇到处理高温烟气的场合 ,如焙烧窑、化铁炉、电弧炉、焚烧炉、干燥机、铁水处理等。在此结合铁水处理高温烟气的具体情况 ,介绍了可采取的各种技术措施     

高温除尘系统应用蒸发冷却技术

通过某钢厂铁水预处理项目,蒸发冷却塔在除尘系统高温烟气冷却降温中的实际应用,与常用冷却方法的比较,说明蒸发冷却是高温烟气的有效降温方法。     

袋式除尘器的应用

袋式除尘器净化设备主要依靠其清灰方式的改革,以及滤料的改进取得了不断的发展。近年来,通过对除尘系统及除尘器设备的适当处理,使袋式除尘器的应用范围更趋广泛。目前已能利用袋式除尘器来处理高温、高湿、粘结、爆炸、磨啄、腐蚀性烟气甚至过滤含有超细粉尘的空气。     

脉冲袋式除尘器在立窑烟气治理中的应用

文章比较了用于水泥立窑烟气治理的几种除尘装置，凸现了脉冲袋式除尘器的优点。介绍了长袋低压脉冲袋式除尘技术在水泥厂立窑烟气治理中的应用及治理效果，同时对脉冲袋式除尘器在立窑烟气治理中的应用归纳了几点体会。     

袋式除尘技术的发展及其在燃煤电厂烟气处理中的应用

在燃煤电厂烟气除尘处理中,袋式除尘技术的应用确实能够在较大程度上体现出自身的价值,对于降低延期的大气污染起到了关键作用,本文就主要围绕着袋式除尘技术的发展及其在燃煤电厂烟气处理中的应用进行了简要的介绍,并且针对当前的应用不足提出了一些建议,希望有助于今后袋式除尘技术的进一步发展。     

新钢2×210t转炉二次除尘系统设计

新钢三期技改工程中,炼钢转炉非工艺除尘系统,包括铁水预处理、转炉二次除尘、精炼除尘及辅料上料系统除尘。针对转炉二次除尘工艺流程、主要设备参数、系统技术优势以及运行效果进行了叙述,项目投产后运行良好,烟气排放达标。     

循环流化床烟气脱硫装置对袋式除尘器影响的实验研究

在1台与袋式除尘器配套的循环流化床烟气脱硫系统上,通过对运行脱硫系统前后袋式除尘器的脱硫效果机理性分析。研究了循环流化床烟气脱硫装置对袋式除尘器工作稳定性、除尘效率和阻力的影响,并提出了改进措施。     

袋式除尘器在立窑烟气除尘中的应用

对立窑烟尘排放特点与立窑除尘工艺中的问题及对策进行了讨论。分析了立窑烟尘排放特征,对几种常见的立窑除尘的设备和工艺进行了比较,指出袋式除尘器可成功地用于立窑烟气除尘。并且从滤料选择、清灰方式、烟温控制、灰斗的气密性等方面详细地完善了袋式除尘器在立窑烟气除尘中的应用。     

电石炉炉气电改袋除尘技术

介绍了某厂3台20 000kVA内燃式电石炉炉气除尘系统由原来采用的电式除尘器改为袋式除尘器技术,同时将原系统内的增湿塔改造为强制风冷及预荷电、预除尘设备,这样不但可以降低烟气温度使其满足袋式除尘器对进口烟气温度的要求,同时使微细粉尘荷电凝聚,提高了后续袋式除尘器对颗粒的捕集效率,并降低了袋式除尘器的阻力损失。改造后的系统运行稳定,烟气出口排放浓度满足国家环保要求。     

燃煤锅炉烟气除尘技术研究现状及进展

本文介绍了袋式除尘、静电除尘、电袋复合除尘等燃煤锅炉传统烟气除尘技术的原理、特点,针对运行过程中存在的问题,对比分析了低低温除尘技术、湿式电除尘技术、聚并技术、协同脱除技术等新型除尘技术的优势和应用前景,并对未来燃煤锅炉烟气除尘技术的发展提出了建议。     

Capture and separation of CO2 from flue gas by coupling free and immobilized amines

A novel system was proposed for the capture and separation of CO2 from flue gas. In this method, a resin was employed to regenerate the amine capturing CO2 from flue gas at room temperature. The feasibility for the resin to regenerate amines such as MEA, MAE, TEA, and ammonia was demonstrated. It was also discovered that the resin could be regenerated by hot water.     

玻璃窑高温烟气净化工艺设计

通过分析已实施的工程运行情况,总结了玻璃窑烟气采用湿法净化系统存在的一些问题:一是高温腐蚀非常严重,二是结垢堵塞严重,再就是水处理系统的冷热水分层问题。供类似工程的方案设计参考。     

蒸汽相变促进WFGD系统脱除PM_(2.5)的协同作用分析

蒸汽相变作为预处理措施能显著提高常规除尘设备对PM2.5细颗粒的脱除效率,但对于水汽含量低的原始燃煤烟气蒸汽耗量太大,限制了工程应用,而在燃煤电厂湿法烟气脱硫(WFGD)过程中,烟气降温增湿,再添加少量蒸汽就可以建立PM2.5凝结长大所需要的过饱和环境,进而实现WFGD系统对PM2.5的协同高效脱除。在分析蒸汽相变促进PM2.5脱除影响因素的基础上,结合湿法脱硫过程传热传质特性,定性分析了脱硫塔塔前、塔内和塔出口添加蒸汽对WFGD系统脱除PM2.5的促进作用,并提出具体工艺方案。     

Operating condition influences on PCDD/Fs emissions from sinter pot tests with hot flue gas recycling

This study was designed to clarify the influence of operating conditions on the formation and emissions of polychlorinated-pdibenzodioxins and dibenzofurans (PCDD/Fs) from a sintering process with hot flue gas recycling. A pilot scale sinter pot with simulated flue gas recycling was developed, and four key operational parameters, including temperature, oxygen content of the simulated waste flue gas, the coke rate of the sintering mixture, and the quicklime quality, were selected for exploring PCDD/Fs formation. The results showed that the temperature of the recycled flue gas had a major affect on PCDD/Fs formation, and a high temperature could significantly increase their formation during sintering. A clear linear correlation between the temperature of recycling flue gas and PCDD/Fs emission (r = 0.93) was found. PCDD/Fs could be reduced to a certain extent by decreasing the level of oxygen in the recycled flue gas, while sintering quality was unchanged. The coke rate had no significant influence on the formation of PCDD/Fs, but the quality of quicklime used in the sintering mixture could affect not only the amount of PCDD/Fs emissions but also the sintering productivity. Compared with a benchmark sinter pot test, PCDD/Fs emissions markedly decreased with improvements to quicklime quality. However, the reduction in PCDD/Fs emissions realized by using high-quality quicklime was limited by the temperature of the inlet gas. The highest reduction achieved was 51% compared with conventional quicklime when the temperature of the inlet gas was 150°C.     

Dissimilatory reduction of FeIII (EDTA) with microorganisms in the system of nitric oxide removal from the flue gas by metal chelate absorption

In the system of nitric oxide removal from the flue gas by metal chelate absorption, it is an obstacle that ferrous absorbents are easily oxidized by oxygen in the flue gas to ferric counterparts, which are not capable of binding NO. By adding iron metal or electrochemical method, Fe^Ⅲ (EDTA) can be reduced to Fe^Ⅱ(EDTA).However, there are various drawbacks associated with these techniques. The dissimilatory reduction of Fe^Ⅲ(EDTA) with microorganisms in the system of nitric oxide removal by metal chelate absorption was investigated. Ammonium salt instead of nitrate was used as the nitrogen source, as nitrates inhibited the reduction of Fe^Ⅲ due to the competition between the two electron acceptors. Supplemental glucose and lactate stimulated the formation of Fe^Ⅱ more than ethanol as the carbon sources. The microorganisms cultured at 50~C were not very sensitive to the other experimental temperature, the reduction percentage of Fe^Ⅲ varied little with the temperature range of 30-50℃.Concentrated Na2 CO3 solution was added to adjust the solution pH to an optimal pH range of 6-7. The overall results revealed that the dissimilatory ferric reducing microorganisms present in the mix-culture are probably neutrophilic, moderately thermophiUc Fe^Ⅲ reducers.     

高温高湿气流湿式净化负压系统中引风机的选配

本文通过高温烟气湿式净化特性与引风机工作原理的分析 ,论述了在高温烟气湿式净化负压系统中的引风机选配。该研究有利于高温烟气的净化和处理。     

高温烟气静电除尘中试试验研究

为了研究在宽间距静电除尘器内部流动的大流量高温烟气中颗粒物的静电捕集特性,基于CFB锅炉中试试验平台设计并搭建了高温静电除尘中试装置.试验了板间距300mm、最高温度达到1020K的实际烟气中颗粒物的静电捕集特性,获得了放电电压、温度和烟气流速等关键因素对颗粒物的静电捕集的影响规律.实验结果表明,高温静电除尘器中烟气流速为0.3m/s,温度为1020K下达到了82.2%的除尘效率,证实了针对实际高温烟气,静电除尘器有较好的颗粒捕集效果.通过对比563K到1020K下的热态试验以及常温下的冷态试验,发现颗粒捕集效率随温度的上升迅速降低,这与高温下流速的上升、放电电压的降低以及气体黏性的增加有关.     

糖厂酒精废醪液用于锅炉烟气治理技术分析

利用糖厂废醪液治理锅炉烟气，可蒸发水量60％－70％，并除去少量的CODCr.应通过提高进口烟气温度，尽量多用甘蔗渣为锅炉燃料和提高湿式除尘效率进一步提高该技术的处理能力。     

浅谈烟气调质系统在电厂中降低烟尘排放量的应用

通过烟气调质,来降低烟气温度,同时降低飞灰比电阻,使除尘效率得到提高,电厂周围环境得到保护。该系统的使用在其它电厂也得到应用。