半干法烟气脱硫除尘多级功能处理装置技术与应用

文中介绍了一种炉窑烟气调质、烟气除尘、烟气脱硫在一个单体结构中的一体化装置和在烟气除尘脱硫技术上的应用,并对该脱硫除尘装置与传统的半干法烟气脱硫除尘装置进行了比较。     

用于臭氧氧化烟气脱硝与烟气余热回收的一体化实验台

锅炉烟气中的NO_x是大气污染的重要原因之一。针对燃气锅炉NOx超低排放的要求、以及烟气中大量余热被浪费的现状,提出了烟气脱硝与余热回收一体化的新方法,搭建了一体化实验台,在逆流式烟气喷淋塔中,进行了采用臭氧氧化烟气脱硝、并同时回收烟气余热的实验研究。研究了O_3/NO摩尔比、液气比、碱液吸收对脱硝效果的影响,并对脱硝与余热回收的耦合关系进行了分析。在实验室实验的基础上,进一步进行了实际工程的中试研究。结果表明,烟气脱硝与余热回收一体化是可行的,实验台实验中,当烟气温度为83.0℃、喷淋水温度为46.4℃、液气比为14.8 m~3·L~(-1)、O_3/NO摩尔比为1.6时,脱硝率为30%,同时回收烟气余热量18.5 kW。     

喷动床半干式烟气脱硫脱硝实验研究

烟气脱硫脱硝一体化技术适合现阶段我国国情,具有良好的应用前景。以尿素为吸收剂,在喷动床实验装置中进行半干式烟气脱硫脱硝研究,考察了该方法的可行性及尿素与污染物摩尔比、近绝热饱和温差、进口烟气温度、进口污染物浓度等主要操作条件对脱硫效率和脱硝效率的影响。结果表明：该方法在适当的操作条件下可获得85%以上的脱硫效率和70%...     

湿式旋流脱硫除尘一体化装置在燃煤锅炉烟气净化上的应用

某中药厂4 t/h燃煤锅炉烟气采用湿式旋流脱硫除尘一体化装置取得了良好的效果,经实际运行测定除尘率达95%,脱硫率达77%,排出的烟气均能达到排放标准.该净化装置具有旋风水膜除尘器和湿式旋流板洗涤器的双重功能,通过介绍该一体化装置的机理、设计参数和技术经济分析,为燃煤锅炉烟气的脱硫除尘提供参考.     

电子束深度氧化烟气净化技术

介绍电子束烟气净化技术的特点 ,对传统电子束法与深度氧化法的反应原理、工艺流程进行了比较及分析 ,实验结果表明 ,电子束深度氧化烟气净化技术能耗低、可靠性高 ,是一种具有广阔工业应用前景的环保新技术。     

水蒸气/氨活化在脉冲电晕脱硫工业中试装置上的应用

在工业中试装置上进行了水蒸气／氨活化实验,同时开展了脉冲电源的调试运行、脱硫副产物收集一体化、工艺参数以及对副产物成份分析等实验。在烟气流量4500～11000m^3／h、反应器入口温度60-70℃、氨硫化学计量比约1：1、系统连续运行和采用一体化的单电场进行脱硫副产物收集的条件下．得到结果：水蒸气／氨活化脱硫效果明显,并且有较好的副产物收集功能,收集效率20％～30％;副产物中SO4^2-：SO3^2-大于95：5,脱硫效率稳定大于90％,副产物收率大于85％。     

烟气脱硝技术研究新进展

简介了国内外已工业应用的主要烟气脱硝技术如选择性催化还原法（SCR）、选择性非催化还原法（SNCR）和电子柬脱硝技术（EBA）的应用现状及其发展,并对近年来国内外发展的烟气脱硝新工艺、新技术的原理及研究现状进行了评述,最终展望了中国烟气脱硝技术的未来的发展方向。     

湿法烟气脱硫工艺中烟气再热方式的选择

分析了湿法烟气脱硫烟气再热原因,介绍了多种烟气再热方法,并对其进行了技术分析,为湿法烟气脱硫工程的烟气再热系统设计提供了依据。     

锅炉烟气脱硫除尘一体化装置的开发与应用

本文介绍了国内外已应用的锅炉脱硫除尘一体化装置,并结合国情,提出了应重点发展的锅炉烟气脱硫除尘一体化装置.     

锅炉烟气脱硫除尘一体化装置的开发与应用

本文介绍了国内外已应用的锅炉脱硫除尘一体化装置,并结合国情,提出了应重点发展的锅炉烟气脱硫除尘一体化装置.     

电子束半干法烟气净化技术

电子束烟气净化技术由于能够同时脱除烟气中的SO2 和NOx 而得到世界各国环保界的重视。传统的电子束烟气净化技术在工业应用中存在能耗高、副产品黏结严重、工作可靠性低等问题。新型电子束半干法烟气净化技术解决了传统工艺在工业化应用中存在的问题 ,可以在较小的辐照剂量下获得更为理想的烟气净化效果 ,提高了系统的工作可靠性 ,是一项工业应用前景十分广阔的环保技术。     

烟气中多种污染物协同脱除的研究

烟气中多种污染物协同脱除是烟气净化领域的研究热点.在现有烟气脱硫技术研究的基础上,对活性焦干法、多级增湿半干法、氧化性添加剂湿法以及等离子体湿法这4种烟气污染物协同脱除技术进行了系统的研究.研究发现,以活性焦为载体添加适当的催化剂能够实现在高效脱硫基础上的同时脱硝;多级增湿半干法技术提高了脱硫剂颗粒在吸收塔内反应全过程的含湿均匀性,通过添加复合促进剂可以提高反应速率,强化烟气中SO_2、NO_X等污染物协同脱除;在传统的湿法烟气脱硫技术中,向脱硫剂中加入KMnO_4和NaClO_2等强氧化剂或者采用等离子体前置氧化,能够有效的将难吸收的NO氧化成NO_2、HNO_2和HNO_3,最终实现同时脱硫脱硝.     

Control of mercury emissions from a municipal solid waste incinerator in Japan

The control of Hg emissions from a municipal solid waste incinerator (MSWI) is very important, because more than 78% of municipal solid waste (MSW) is incinerated. The Hg content of coal used in utility boilers is relatively low in Japan. In this study, recent trends in the Hg content of MSW in Japan and activated carbon (AC) injection as a control technology of Hg emission from an MSWI are discussed. The effect of AC injection on Hg removal from flue gas in an MSWI was investigated by pilot-scale experiments using a bag filter (BF). The injection of AC increases the Hg reduction ratio by 20-30% compared with cases without AC injection. The Hg reduction ratio increases as the flue gas temperature decreases. The Hg reduction ratio is closely related to the inlet Hg concentration and was expressed with a Langmuir-type adsorption isotherm.     

Control of Mercury Emissions from a Municipal Solid Waste Incinerator in Japan

Abstract

The control of Hg emissions from a municipal solid waste incinerator (MSWI) is very important, because more than 78% of municipal solid waste (MSW) is incinerated. The Hg content of coal used in utility boilers is relatively low in Japan. In this study, recent trends in the Hg content of MSW in Japan and activated carbon (AC) injection as a control technology of Hg emission from an MSWI are discussed. The effect of AC injection on Hg removal from flue gas in an MSWI was investigated by pilot-scale experiments using a bag filter (BF). The injection of AC increases the Hg reduction ratio by 20–30% compared with cases without AC injection. The Hg reduction ratio increases as the flue gas temperature decreases. The Hg reduction ratio is closely related to the inlet Hg concentration and was expressed with a Langmuir-type adsorption isotherm.     

K2Cr2O7溶液同时脱硫脱硝实验研究

采用K2Cr2O7溶液作为吸收液,在自制的鼓泡反应器内,对模拟烟气进行同时脱硫脱硝的实验研究,考察多种因素对SO2脱除率(即脱硫率)和NO脱除率(即脱硝率)的影响。实验结果表明:K2Cr2O7浓度、反应温度、NO浓度、SO2浓度、烟气流量对脱硫率、脱硝率影响显著;当烟气流量为0.4L/min,气相中O2体积分数为6%,SO2体积分数为0.09%,NO体积分数为0.100%,K2Cr2O7摩尔浓度为10mmol/L,反应温度为40℃时,脱硫率、脱硝率分别达到100%和64.3%。     

生物法同时脱硫脱硝试验研究

采用轻质陶粒生物滴滤塔处理摸拟燃煤烟气中二氧化硫和氮氧化物的试验研究，探讨生物法同时脱硫脱硝的影响因素及生物降解宏观动力学。研究结果表明，生物法能有效同时去除烟气中的二氧化硫和氮氧化物，烟气同时脱硫脱硝效率分别可达99.9%和88.9%。为获得最佳烟气同时脱硫脱硝效果，二氧化硫和氮氧化物进气负荷应分别＜140 g/（m³·h）和20 g/（m³·h），循环液pH=7～8，空床停留时间为30.28 s，喷淋密度为8.81 L/（m³·h）。     

Environmental release and mass flux partitioning of PCDD/Fs during normal and transient operation of full scale waste to energy plants

The paper reports on global release and mass partitioning in the flux of residues of PCDD/Fs, evaluated with dedicated field campaigns at a municipal solid waste incineration plant during normal and transient operation. Results are compared with those obtained in other installations equipped with furnaces, energy recovery options and flue gas treatment technologies representative of most of the European incineration plants currently in operation. Levels of the pollutants of interest were determined in all the solid, liquid and gaseous residues produced by every single facility, and the results analysed in terms of the effects arising from the fed waste and the configuration of the plant. PCDD/Fs total release between 1.5 and 45 microg I-TEQ per ton of burned waste was evaluated, with lower values resulting from the adoption of catalytic conversion process for flue gas treatment. Most of the mass flux emitted is associated with solid residues deriving from activated carbon PCCD/F dry removal options, with significant contributions also from fly ash produced by particulate removal devices located immediately downstream the boiler and from scrubber blowdowns treatment sludge. During transient operating conditions the dioxin total release may increase by 50% with comparison to steady-state functioning.     

尿素/三乙醇胺吸收烟气NO_x的实验研究

以尿素作为吸收液,与NOx反应生成N2和CO2,脱除烟气中的氮氧化物。以一套双级串连的填料塔为主体反应器,分别对气速、液气比、反应物浓度、添加剂浓度和反应温度等参数对尿素溶液吸收NOx反应的影响进行了实验研究,获得了优化实验工况,研究结果显示,在气速为0.1 m/s、液气比为16 L/m3、三乙醇胺为0.01%（质量比）、尿素浓度为13%（质量比）工况下,反应温度为30~70℃,脱硝总效率可达50%以上,且随着NOx体积分数增加而提高。     

PCDD/F mass balance in the flue gas cleaning units of a MSW incineration plant

With the main purpose of evaluating PCDD/F presence and the corresponding mass balance over the emissions control system, an extensive study was performed on a municipal solid waste full scale incinerator equipped with a best available technology flue gas treatment line. Present paper reports the main results obtained, with particular reference to the PCDD/F concentration profiles and mass balances derived for every process unit of the flue gas control system. Total release evaluated for the plant is also outlined compared with data on PCDD/F content of raw waste and with reference values included in most recent guidelines.