循环流化床锅炉袋式除尘器改造研究

内蒙古鄂尔多斯双欣电力公司2×300 t/h循环流化床锅炉烟气除尘应用袋式除尘器，投运后除尘器一直存在运行阻力偏高、滤袋破损频繁问题，严重影响锅炉负荷。通过试验测试和数值模拟分析，对滤袋破损原因、烟气参数、除尘器结构型式和流场分布问题进行全面研究，提出科学合理的袋式除尘器改造优化方案；改造实施后，降低设备运行阻力700 Pa，降低引风机电耗，实现锅炉满负荷稳定运行，解决了滤袋破损问题，为企业节约运行成本，创造了经济效益。     

燃煤电厂袋式除尘器滤袋材料选择

结合某电厂“上大压小”改建工程中2台600 MW机组配套电袋除尘器的实际情况,分析了滤袋材料的选择原则及更换原因,论述了袋式除尘器滤袋材料对烟气的适应性,为燃煤电厂袋式除尘器滤袋材料的选择提供参考.     

燃煤电厂电改袋式除尘器气流分布数值分析

利用CFD方法对燃煤电厂电改袋式除尘器气流分布进行数值分析,给出了袋式除尘器箱体流量分配,每个滤袋单元处理风量、滤袋迎面气流速度大小和分布.数值分析结果与模型试验、现场测试结果基本吻合,可作为除尘器结构设计优化的依据.     

袋式除尘器气流分布数值计算研究

采用结构化/非结构化混合网格技术、多孔介质模型及k-ε两方程湍流模型,对某袋式除尘器及进出口管道内的气体流场进行了数值计算.计算结果表明,合理布置导流板后,袋式除尘器两箱体流量偏差为1.8％;除尘器下游滤袋单元处理气量偏大,中游滤袋单元处理气量较小,最大流量与最小流量偏差为22.3％；靠近除尘器进口处灰斗内存在气流回流特性,易造成粉尘的二次附着现象.     

《火力发电厂锅炉烟气袋式除尘器滤料滤袋技术条件》标准解读

主要介绍了电力行业新标准《火力发电厂锅炉烟气袋式除尘器滤料滤袋技术条件》（DL／T1175—2012）的修订背景及主要内容，重点分析了针对火电行业应用的袋式除尘滤料纤维、基布、缝纫线等重要指标，并对今后的标准化发展进行了展望。     

我国袋式除尘器的技术进步

近十年来，我国袋式除尘产业获得迅速发展，技术不断进步，现分述如下：1袋式除尘器结构形式的改进袋式除尘器从小型单室结构发展到大型多室结构，过滤面积从几平米发展到几万平米，规模越来越大，耗钢量越来越多。因此，优化箱体结构，降低耗钢量已成为袋式除尘器技术进步的一个重要方面。1．1采用滤袋框架整体安装的单元组合形式，开发多种结构紧凑轻巧的袋式除尘器新产品。如KB型快装振打玻纤扁袋除尘器，利用玻纤织物抗拉伸，耐高温，易清灰的特点，将其来回搞折绷紧缝合在框架上，通过框架振打，实现清灰，耗钢量仅为15kg／m’，是我…     

袋式除尘器静电强化试验取得良好成效

据美国空气污染控制协会1987年年会资料介绍,袋式除尘器通过静电作用强化,其投资可比传统袋式除尘器降低25％～48％。静电强化是将高压电极放在滤袋内,与袋同心,在袋与电极间建立电场,改变了袋内粉尘沉积的方式。小型试验结果表明,经静电强化的袋式除尘器压降可比传统的降低达70％。因此,对于同样压降水平,静电强化可使气布比大     

浅析电袋除尘器滤袋的设计选型

扬子石化热电厂1～9号炉电除尘器全部改造为电袋除尘器后,出口粉尘浓度均满足排放要求。但运行中发现5、6、9号炉电袋除尘器滤袋破损较多,影响了电袋除尘器的安全稳定运行。分析了这3台炉滤袋破损的原因,提出在电除尘器改造电袋除尘器的工程实践中滤袋选型是个关键。滤袋设计时应以滤料的连续长期使用温度来选型,同时应重视设计煤种和较核煤种的选取,袋区的过滤风速以1.0～1.2m/s为宜。     

上海某电厂320MW 机组“电改袋”工程

针对上海某电厂4×320 MW机组中的3、4号炉电除尘器提标改造为袋式除尘器项目，介绍了改造背景、改造技术以及改造后袋式除尘器的运行情况。除尘器投运至今，运行稳定，各项指标达到设计要求。     

浅析XLDM型脉冲袋式除尘器在CFB锅炉上的应用

介绍了兖矿国宏化工公司2台160 t/h CFB锅炉配套XLDM-5700型袋式除尘器的实际运行情况,从除尘效率、喷吹方式、运行能耗等方面分析了袋式除尘器的性能,并总结出XLDM型袋式除尘器最佳运行方式。     

Heavy metal content in rubbish bags used for separate collection of biowaste

The heavy metal content of several rubbish bags used to collect the organic fraction of municipal solid waste (OFMSW) is shown in this paper. Nowadays, several public awareness campaigns carried out by municipalities have promoted rubbish bags based mainly on their appearance, without concern for their heavy metal content. A high amount of heavy metals was detected in some polyethylene bags promoted in different campaigns for OFMSW source-sorted collection, while compostable bags presented low quantities of heavy metals. Some other rubbish bags, as well as commercial bags, were also analysed for comparison. These results should be taken into account before promoting the use of one or other type of bag. Moreover, the rubbish bag manufacturers should reduce the heavy metal content in order to avoid heavy metal scattering in the environment, and also to reduce the consumption of raw materials.     

Comparison of compostable bags and aerated bins with conventional storage systems to collect the organic fraction of municipal solid waste from homes. A Catalonia case study

The separation of biowaste at home is key to improving, facilitating and reducing the operational costs of the treatment of organic municipal waste. The conventional method of collecting such waste and separating it at home is usually done by using a sealed bin with a plastic bag. The use of modern compostable bags is starting to be implemented in some European countries. These compostable bags are made of biodegradable polymers, often from renewable sources. In addition to compostable bags, a new model of bin is also promoted that has a perforated surface that, together with the compostable bag, makes the so-called “aerated system”. In this study, different combinations of home collection systems have been systematically studied in the laboratory and at home. The results obtained quantitatively demonstrate that the aerated bin and compostable bag system combination is effective at improving the collection of biowaste without significant gaseous emissions and preparing the organic waste for further composting as concluded from the respiration indices. In terms of weight loss, temperature, gas emissions, respiration index and organic matter reduction, the best results were achieved with the aerated system. At the same time, a qualitative study of bin and bag combinations was carried in 100 homes in which more than 80% of the families participating preferred the aerated system.     

Enhanced degradable yard waste collection bag behavior in a field-scale composting environment

The degradation of four formulations of yard waste-filled collection bags was evaluated in a field-scale test of 15.5- or 31-m-long windrows at a community yard waste composting site. Variables of bag contents, bag chemical composition, and length of exposure were evaluated. Chemical compositions of the bags included (1) low-density polyethylene (LDPE) + 6% cornstarch + 2 levels of prooxidant, (2) LDPE + 9% cornstarch + prooxidants, and (3) LDPE without cornstarch but with photooxidation enhancers. Results showed that all products weakened and/or disintegrated to some extent. However, the bags with 6% starch disintegrated too slowly to allow timely processing of the compost. The bags with 9% starch and other additives to promote multiple degradation mechanisms degraded at the fastest rate of those evaluated here. The photodegradable bags with solar exposure during composting disintegrated rapidly, but when turned to expose new surfaces to light, further strength losses occurred slowly.Paper presented at the Biodegradable Materials and Packaging Conference, September 22–23, 1993, Natick, Massachusetts.     

焦作电厂袋式除尘器与脱硫系统应用分析

介绍了焦作电厂6台670t／h燃煤锅炉袋式（电）除尘器、脱硫、干除灰改造工程技术特点、运行情况及环保验收监测性能指标．重点对袋式除尘器与脱硫配套应用效果进行分析和探讨。     

Oxidation catalyst of iron oxide suppressing dioxin formation in polyethylene combustion

A new iron oxide catalyst, which has a superior oxidation activity in carbon monoxide and polyethylene (PE) combustion, was synthesized by an aqueous solution reaction. Catalytic oxidation of carbon monoxide over six kinds of hematite obtained from the goethite was done using a microcatalytic pulse reactor, and the composition of the hematite with the highest oxidation activity was determined. With the aim of suppressing dioxin formation on combustion, incineration tests of solid wastes in PE refuse bags with and without the goethite were carried out using a commercial semibatch-type incinerator with a combustion chamber of 6.2 m³. The result confirmed that the concentration of dioxins in the flue gas decreased considerably when the refuse was incinerated in PE bags manufactured with goethite. Received: July 24, 2000 / Accepted: October 18, 2000     

Effects of pre-treatment technologies on quantity and quality of source-sorted municipal organic waste for biogas recovery

Source-sorted municipal organic waste collected from different dwelling types in five Danish cities and pre-treated at three different plants was sampled and characterized several times during one year to investigate the origin of any differences in composition of the pre-treated waste introduced by city, pre-treatment technology, dwelling type or annual season. The investigated pre-treatment technologies were screw press, disc screen and shredder+magnet. The average quantity of pre-treated organic waste (biomass) produced from the incoming waste varied between the investigated pre-treatment technologies: 59%, 66% and 98% wet weight, respectively (41%, 34% and 2% reject, respectively). The pre-treatment technologies showed differences with respect to distribution of the chemical components in the waste between the biomass and the rejected material (reject), especially for dry matter, ash, collection bag material (plastic or paper) and easily degradable organic matter. Furthermore, the particle size of the biomass was related to the pre-treatment technology. The content of plastic in the biomass depended both on the actual collection bag material used in the system and the pre-treatment technology. The sampled reject consisted mostly of organic matter. For cities using plastic bags for the source-separated organic waste, the expected content of plastic in the reject was up to 10% wet weight (in some cases up to 20%). Batch tests for methane potential of the biomass samples showed only minor variations caused by the factors city, pre-treatment technology, dwelling type and season when based on the VS content of the waste (overall average 459STPm(3)/tVS). The amount of methane generated from 1t of collected waste was therefore mainly determined by the efficiency of the chosen pre-treatment technology described by the mass distribution of the incoming waste between biomass and reject.     

Pakistan’s plastic bag ban: an analysis of citizens’ support and ban effectiveness in Islamabad Capital Territory

Journal of Material Cycles and Waste Management - The excessive consumption of single-use plastic bags in recent years has fueled plastic pollution leading to considerable adverse consequences for...     

内滤式布袋除尘器滤袋内流场的数值计算

利用FLUENT6．1流体动力学计算软件，对内滤式袋式除尘器布袋内的流场、压力进行了计算模拟，得到了布袋尺寸、过滤速度、进出口压差变化时布袋内流场的变化情况，为袋式除尘器的改进和设计提供了理论依据。     

电改电袋复合除尘器在220MW机组上的应用

分析了某电厂220MW机组燃煤锅炉电改电袋复合除尘器的设计优化、运行调试和关键参数，重点对比了改造后电袋复合除尘器和常规袋式除尘器的清灰周期、运行阻力等参数变化，为燃煤锅炉电改电袋复合除尘器设计和运行维护的提供参考。