袋式除尘器滤料过滤性能研究

滤料是袋式除尘器的重要部件,滤料的过滤性能对除尘器的运行阻力及烟尘排放浓度有着直接影响。聚苯硫醚（PPS）、聚四氟乙烯（PTFE）和聚亚酰胺（P84）是袋式除尘器常用的几种滤料,对其进行了常温过滤性能测试。测试结果表明,即使采用相同的纤维,不同滤料厂家的产品性能也存在较大的差异。     

PTFE乳液涂层对针刺毡复合滤料过滤性能的改良

采用PTFE乳液对P84.PTFE混纺针刺毡复合滤料进行涂层整理,并将其与未经整理的试样进行VDI滤料过滤性能模拟测试,进而阐述PTFE乳液涂层对该复合滤料过滤性能的影响。     

以PTFE为基布的混织滤料过滤性能及其在燃煤电厂的应用

滤料是袋式除尘器和电袋复合除尘器的核心,通过对目前常用的两种PTFE混织滤料材质结构、加工工艺及适用条件进行的对比分析,并列举了其在燃煤电厂中的应用效果,阐明了混织滤料的优良过滤性能,适用于烟气温度高、粉尘排放要求较高、工况变化大的燃煤电厂。     

燃煤电厂袋式除尘器滤料耐氧化性能试验研究

燃煤电厂锅炉烟气中含有SOx和NOx,会氧化腐蚀滤料。试验研究了燃煤电厂布袋除尘器滤料断裂强力与运行时间的关系。结果表明,滤料在酸性环境中会被氧化同时断裂强力下降,但断裂强力下降后均会出现反弹,后处理工艺可提高滤料的抗氧化性能,但会降低滤料的断裂强力。     

燃煤电厂对过滤材料的要求及其解决方案

随着燃煤电厂烟尘排放标准的日益严格,发展袋式除尘器改成为必然趋势。通过对我国燃煤电厂烟气成分和工况条件的分析,提出了采用新型PPS复合滤料及改进的玻璃纤维覆膜滤料的方案可以满足燃煤电厂袋式除尘器所需滤料的要求。     

曝气生物滤池中滤料的应用研究进展

介绍了曝气生物滤池的工作原理和生物滤料的性能;重点综述了无机滤料的分类、滤料的改性和复合陶粒生物滤料的应用情况,并对双层滤料工艺进行了讨论;指出今后应加强生物膜在滤料上的生存特征及适应性的研究,以便寻求能改善滤料性能的新工艺和方法。     

燃煤电厂袋式除尘器滤料的研究

详细介绍了国内外燃煤电厂袋式除尘器所用滤料的试验研究结果，对滤料的发展方向进行了阐述。并认为燃煤电厂采用袋式除尘器的技术是可靠的。     

改性核桃壳滤料对油田含油污水的过滤效果

采用亚硫酸氢镁蒸煮法对核桃壳滤料进行亲水改性,考察了改性核桃壳滤料对油田含油污水的过滤、反洗效果,探讨了改性前后核桃壳滤料的过滤过程及乳化油捕集机理。实验结果表明:在蒸煮温度为95℃、蒸煮时间为5 h、w(MgHSO_3)为5%的条件下,核桃壳滤料接触角由改性前的117.1°降至62.4°;分4批次过滤含油污水,改性核桃壳滤料的平均出水含油量为32.3 mg/L,平均油去除率为78.5%,平均浊度为7.7 NTU,平均浊度去除率为89.7%;改性核桃壳滤料的反洗效果显著改善,反洗水含油量由520 mg/L提高到840 mg/L,核桃壳滤料增重率由4.3%下降到0.2%。     

1000MW超超临界发电机组SCR脱硝系统性能测试试验

随着火电建设步伐的加快,单机容量1 000MW超超临界机组越来越多,其脱硝装置的正常投用对我国空气环境质量的提升有着重要意义,脱硝性能测试试验倍受关注。以浙江国华浙能发电有限公司1 000MW燃煤机组脱硝装置性能测试试验为例,对脱硝系统性能测试进行了试验研究。结果表明,除部分设备噪声超标外,其余指标均符合设计要求。对试验过程中应注意的问题进行了说明。     

火电厂锅炉烟气电除尘与袋式除尘技术经济比较

阐述了电除尘器与袋式除尘器的技术差异,重点从净化效率、运行阻力、能耗、设备投资与占地等方面进行了技术经济对比.综合分析结果表明:火电厂锅炉烟气净化采用袋式除尘器的综合效益比电除尘器显著.     

Treatment of urban stormwater for dissolved pollutants: A comparative study of natural organic filter media

Sorption capacities were evaluated for the dissolved stormwater (SW) pollutants onto two tree mulches and jute fiber. SW spiked with predetermined concentrations of copper (Cu), cadmium (Cd), hexavalent chromium (Cr ⁺⁶), lead (Pb), zinc (Zn), and benzo[a]pyrene (B[a]P), naphthalene (NP), fluoranthene (FA), 1,3‐dichlorobenzene (DCB), and butylbenzylphthalate (BBP) were used in this study. Each medium removed close to 100 percent of all the pollutants at the concentrations studied. Sorption capacities (μg/g) of the three organic media were in the order of jute > hardwood mulch > softwood mulch, and on a mole basis, both the heavy metals and the toxic organics were sorbed by the three media in an identical sequence: Cr ⁺⁶ > Cu, Zn > Cd > Pb; and NP > DCB > FA > B[a]P > BBP. Sorption capacities of the hardwood wood mulch and jute fiber for the pollutants were correlated with distinctive physical properties of the pollutants. © 2005 Wiley Periodicals, Inc.     

圆盘式与皮带式石膏脱水机经济技术对比分析

圆盘式脱水机是近年来新发展的一种石膏脱水设备,以国内某2×660 MW机组电厂为例,针对新式的圆盘式脱水机和传统的皮带式脱水机从经济性和技术性进行了对比分析,结果发现圆盘式脱水机在长期运行后有着较大的经济和技术优势。     

Preparation,sintering behavior,and expansion performance of ceramsite filter media from dewatered sewage sludge,coal fly ash,and river sediment

The main aim of this study is to assess the preparation, sintering behavior, and expansion performance of ceramsite filter media (CFM) from dewatered sewage sludge, coal fly ash, and river sediment without using any natural resources. The results showed that the investigated physical properties of lab made CFM met with the China’s industrial standard of CJ/T 299-2008 and the concentration of heavy metals in the lixivium was lower than the threshold of GB 5085.3-2007. During the sintering process, the relationships between ignition loss rate, expansion rate, and sintering temperature could be well described simultaneously by the 3-order polynomial fitting curve, with high correlation coefficient values (R ² > 0.999). The fitting curves of the ignition loss rate and expansion rate had one peak and one valley, respectively, and their cut-off point that is the sintering temperatures were the same (700 °C). The whole sintering process could be divided into two stages. The ignition loss rate was gradually increased in both the stages. At the same time, the expansion rate was decreased in the first stage and then increased in the second stage. The significance of this work is to pursue the concept of sustainable development.     

超滤膜的清洗及污染防控

针对污水超滤过程中的膜污染问题,比较了不同清洗剂及清洗顺序对污染膜的清洗效果,考察了超滤运行条件对超滤膜污染的影响,为超滤膜污染的防控提供参考。实验结果表明:各种清洗剂对污染超滤膜清洗效果的优劣顺序为盐酸草酸柠檬酸,氢氧化钠次氯酸钠碳酸钠;强酸—强碱的清洗效果好于弱酸—弱碱;强酸—强碱顺序清洗的通量恢复率(91.88%)大于强碱—强酸顺序清洗的通量恢复率(90.05%);最优运行工艺为运行压力0.04 MPa,进水pH 8.0,膜面流速1.947 m/s,运行周期2 h。     

超临界机组与凝改抽机组供热方案的能耗分析

针对北方某城市的一个规划采暖供热区域的350MW超临界机组供热和将原有2×220MW纯凝机组改为供热机组供热的两种供热方案,就两种不同供热方案的初投资能耗和运行能耗进行了综合能耗比较,从节能的角度就供热方案的选择给出了参考意见。     

膜生物反应器的膜污染机理及其防治

膜生物反应器(MBR)在污水处理中的应用范围和规模虽然不断增加,然而,膜污染严重阻碍了膜生物反应器技术的推广应用.介绍了膜污染产生机理及数学模型,从膜材料选取及膜组件安装、对混合液进行预处理、选择最佳操作条件、采用最佳膜清洗方式四个方面分析了膜污染的防治方法.