印染污泥焚烧烟气污染控制案例分析

以广东省某两家印染厂的印染污泥焚烧项目为主要研究对象,从污泥处理技术路线、焚烧设备及烟气处理流程等各方面入手,对各厂印染污泥与煤混烧烟气中颗粒物、NOx、SO2、酸性气体(HF、HCl)和重金属等污染物的进行采样分析,并对各厂现有烟气污染物控制设施的运行效果进行调研,结果表明,布袋除尘的效果较为理想,除尘效率可达99%以上;使用印染废水作为吸收液的湿法脱硫技术对SO2及酸性气体的去除效果不理想;SNCR对NOx具有一定的去除效果,是一种较为经济、高效的脱硝技术;焚烧后,大部分重金属最终以飞灰的形式被除尘器去除,但仍有部分重金属如Hg在出口烟气中的浓度仍然很高,需要采取必要的措施控制烟气中的重金属. 此外,基于印染污泥焚烧实例分析,提出适于印染污泥与煤混烧烟气处理工艺流程.     

MESIP∗: Modelling environmental scenarios in ponds

MESIP is a fugacity model which can predict the fate of organic hydrophobic chemicals in aquatic ecosystems. In this paper a short introduction to the mathematical model is presented together with a more detailed listing of the required input data. Comparison of the calculated and measured fate of a fluorescent whitening compound in an artificial outdoor pond is shown     

Control of chlorinated aromatic compounds from a municipal solid waste incinerator using limestone addition

In this study, limestone powder was directly added to synthetic MSW, which was fed into a small‐scale fluidized bed incinerator. The concentration of CBzs and CPs in the flue gas were measured before and after a secondary combustion air injection. Finally, the PCDDs and PCDFs concentrations were also measured in the flue gas after the secondary combustion zone. The CaCO₃ added to synthetic MSW not only controls HCl in the flue gas, but suppresses the formation of chlorinated aromatic compounds like CBzs, CPs, PCDDs, and PCDFs. The main mechanisms to control the formation of chlorinated aromatic compounds was more likely related to the suppression of catalytic capability of flyash than the HCl reduction in the flue gas. However, the NO concentration was increased by catalytic reaction of limestone in the fluidized bed.     

我国生活垃圾焚烧二恶英污染现状及减排建议

生活垃圾焚烧的二恶英污染问题在我国已经引起全社会的广泛关注。在分析我国生活垃圾焚烧行业现状与发展趋势和我国部分焚烧厂二恶英排放情况的基础上,提出了我国生活垃圾焚烧二恶英污染防治和减排的建议。     

中国城市垃圾典型可行焚烧技术的综合评价

中国城市垃圾处理的主要方式正在由卫生填埋向垃圾焚烧转变. 基于中国城市垃圾焚烧处置需求特征分析,建立了技术评价指标体系,采用层次分析法,从技术的可靠性、经济性和适用性三方面,对国内外现有4种主要城市垃圾焚烧技术进行了综合评价. 结果表明:流化床技术和层燃技术在技术成熟度、技术能力和二NFDA1英污染控制等方面相对可靠,适用于我国多数大城市的垃圾焚烧处置. 国产流化床焚烧技术更加适应当前国内垃圾分类水平较差的大部分城市;层状焚烧技术则比较适用于城市垃圾管理水平高、垃圾分类较好、热值较高、垃圾处置集中度高和规模较大的城市;旋转焚烧和热解焚烧技术则较适用于垃圾成分复杂、尺寸不均匀的小城镇、工业园区垃圾处置或医疗废物处置,但二者均需加强二NFDA1英排放控制.      

UASB+生物接触氧化工艺处理饮料废水

介绍采用升流式厌氧污泥床反应器(UASB反应器)+生物接触氧化工艺处理饮料废水的工艺设计和运行效果。运行结果表明:此工艺能有效处理饮料废水,COD、BOD5平均去除率分别达95.8%和98.1%,出水水质达DB 61/224—2006《陕西省渭河水系污染物排放标准》的一级排放标准。     

巨厚砾岩下冲击地压发生机理及加固技术研究

针对深部矿井巨厚砾岩下采场冲击地压的易发性和危险性,运用理论分析和室内相似材料模拟试验方法,对华丰煤矿巨厚砾岩下覆岩运动规律及采场冲击地压发生机理进行研究。研究发现:随着工作面的推进,离层自下而上发育,在巨厚砾岩层下部离层空间达到最大。煤层极限平衡区内集中静载荷能量E静和巨厚砾岩破断、垮落释放的集中动载荷能量E动是造成采场冲击地压的根本原因,并且E动诱发冲击地压的强度更高,危险性更大。当E静+E动-Ef min>0时,采场冲击地压启动。在此基础上,提出一种囊袋式离层加固技术,对离层区域进行横向挤压和纵向加固,有效控制巨厚砾岩断裂、垮落,防止冲击地压的发生,减少地表沉陷,实现了煤矿安全绿色开采。     

危险废弃物焚烧处置预处理及烟气净化工艺设计

危险废弃物因其对人类健康、生态环境的严重危害性和破坏性而需特殊处置。以某市危险废弃物焚烧处置工程为例,通过对其预处理系统及烟气净化系统的组成、工程原理、工艺流程等的分析论证,探讨一种危险废物焚烧处置预处理系统及烟气净化系统工艺设计的工程原理和性能特点,为今后在工程实际中的运用提供参考。     

Electric Versus Hydraulic Hospital Beds: Differences in Use During Basic Nursing Tasks

Biomechanical, postural and ergonomic aspects during real patient-assisting tasks performed by nurses using an electric versus a hydraulic hospital bed were observed. While there were no differences in the flexed postures the nurses adopted, longer performance times were recorded when electric beds were used. Subjective effort, force exertion and lumbar shear forces exceeding safety limits proved electric beds were superior. Patients’ dependency level seemed to influence the type of nurses’ intervention (duration and force actions), irrespective of the bed used. The nurses greatly appreciated the electric bed. Its use seemed to reduce the level of effort perceived during care giving and the postural load during critical subtasks. Ergonomics and organizational problems related to adopting electric beds in hospital wards should be addressed further to make their use more efficient.     

基于垃圾焚烧锅炉入料口的风幕技术

分析了垃圾发电锅炉入料口的正压释放问题,设计的风幕技术保证了此类循环流化床锅炉的安全运行,风幕技术改造结构设计合理,实用性强,值得在同类行业中推广应用。