湿法脱硫喷淋塔单层喷淋雾化性能试验

在建立的试验台上,以压力作为间接指标,采用旋流喷嘴和螺旋喷嘴.对喷淋塔单层喷淋工况下的雾化性能进行了试验.试验表明,塔断面压力、断面上雾化粒径及雾滴在喷淋段分散不均匀,对气流分布的作用不明显;随循环液流量或气体流量增大,断面平均静压、全压减小,喷淋段阻力增大,雾化粒径减小;喷嘴形式对喷淋塔的雾化系统影响较大.相比较而言,螺旋喷嘴单层布置喷淋段雾化较均匀.利于均匀分布气流.     

两相流雾化喷嘴在烟气喷雾增湿示范工程中的应用

阐述外混式缩放型喷嘴和内混式Y型雾化喷嘴的结构特点,雾化性能,及其在火电厂烟气增强工程中的应用状况。初步提出烟气增湿采用国产化喷嘴尚需完善的问题。     

脱硫离心喷嘴雾化特性的研究

根据动量守恒原理，分析了脱硫离心喷嘴的结构参数与喷嘴雾化特性(流量系数、喷雾角等)之间的关系。建立了相应的无粘理论计算模型。将理论计算结果与实验数据进行比较，表明该无粘理论计算模型对脱硫喷嘴雾化特性的研究具有一定的参考价值。     

压力式喷嘴在湿法烟气脱硫中的应用

从压力式喷嘴的结构特点、雾化特性及影响因素出发。系统叙述了压力式喷嘴的研究历史与现状。结合湿法脱硫工艺的特点，阐述了压力式喷嘴在湿法脱硫中的应用。并分析了当前的研究状况。     

烟气脱硫超声波雾化器研究

石灰喷雾干法脱硫的关键技术是石灰浆在喷雾干燥吸收塔中的雾化。雾化方法有旋转雾化,射流喷嘴雾化与超声波雾化等。旋转雾化需要高速旋转机械配合,转速高达12000转/分以上,才能得到良好的雾化效果。转轮和射流喷口材料必须高度耐磨,这就使投资费用增加.而超声波     

斜棒栅除尘器安装运行及检修

斜棒栅除尘器的结构可分为斜棒洗涤栅和捕滴器两部份。斜棒栅由稳压水箱、套管、斜棒、支撑板、雾化喷管、喷管和底部冲洗水管组成。斜棒为外套耐热胶管的钢管;雾化喷管为钢管上焊接雾化喷嘴;喷管为钢管     

雾化喷嘴性能测试技术

以国电环境保护研究所内的专门试验台为基础，介绍一种雾化喷嘴性能测试技术。     

陕西省火电厂烟气脱硫工作动态

在贯彻《国务院关于酸雨控制区和二氧化硫污染控制区有关问题的批复》热潮中，西北电管局外事办联合邀请加拿大Turbosonic公司，于1998年4月。日在西安市举办了脱硫技术介绍会。参加会议的有：西北电力集团公司、陕西省环保局、电力研究院。电力设计院、各火电厂、环境监测站等单位60余名领导和技术人员。Turbotak烟气脱硫技术，是加拿大政府支持并列入国际环保的重点项目之一，由Turbosonic公司与安大略省Wedoo大学合作开发的，其Turbotak喷嘴和有机胺吸收与解吸是专利技术。通过专门设计的喷嘴便吸收剂达到极好的雾化效果，应用对温度反…     

脱氢废水吹脱废气的焚烧处理

在顺丁橡胶生产过程中,丁烯氧化脱氢制丁二烯装置,排放含有机酸和羰基化合物等的洗酸水、混合醛酮蒸出液(简称浓醛水)及油吸收尾气。按原设计,洗酸废水经吹脱、中和后送总厂生化处理场处理,浓醛水和油吸收尾气进入烧醛炉焚烧。浓醛水焚烧时,由于喷嘴雾化不好,炉底偶有积水,炉温不易控制,因此效果     

油田高含盐污水雾化蒸发的数值模拟

基于FLUENT软件,对油田高含盐污水的雾化蒸发过程进行了数值模拟,得到了逆流型雾化蒸发塔内的流场分布特性,对比分析了不同操作参数对蒸发效果的影响。结果表明:液滴蒸发速率沿塔体中心轴线自上而下呈加快趋势;进口空气流速与温度是影响液滴蒸发的关键操作参数,提高流速及温度均可加快液滴的蒸发速率;当进口空气流速达到0.4 m/s后,对蒸发速率的影响减弱;当进口空气温度达到313 K后,对蒸发速率的提高作用不大;喷雾锥角的变化对蒸发速率影响不明显;液滴越细化,蒸发速率越快。     

Field performance of a fan‐driven spray evaporator

An emerging evaporation technology uses a powerful axial fan and high‐pressure spray nozzles to propel a fine mist into the atmosphere at high air and water flow rates. Commercial units have been deployed at several locations in North America and worldwide since the mid‐1990s, typically in arid or semiarid climates. A commercial spray evaporator was field tested at the U.S. Department of Energy's Savannah River Site in South Carolina to develop quantitative performance data under relatively humid conditions. A semiempirical correlation was developed from eight tests from March through August 2003. For a spray rate of 250 L/min (66 gpm) and continuous year‐round operation at the Savannah River Site, the predicted average evaporation rate is 48 L/min (13 gpm). © 2006 Washington Savannah River Company     

冲天炉烟气除尘

采用湿法除尘,在烟气管道内设置喷嘴,使烟气充分加湿和降温后再进入立式文丘里,旋流析除尘器,消除了ＣＯ爆炸危险,在冲天炉上部烟囟顶端设安全２盖板,以保证生产的正常进行;烟气经湿式除尘后达到排放标准。     

Enhancement of turbulent scalar mixing and its application by a multihole nozzle in selective catalytic reduction of NOx

The mixing characteristics of a passive scalar in the turbulent flow of a selective catalytic reduction process were numerically and experimentally investigated, focusing especially on an injection nozzle with multiple holes for the reducing agent. The multihole injection nozzle studied has six holes that are perpendicular to the ambient flue gas flow and are located near the tip of the nozzle. Large eddy simulation was applied to the turbulent flow and mixing fields to elucidate the mixing mechanism of the proposed nozzle compared with the single-hole nozzle that is commonly used in the conventional selective catalytic reduction process. From the results, there exist broader regions of higher turbulent intensities for the multihole nozzle than for the conventional single-hole nozzle. These regions are well matched with the positions of high vorticity in the near upstream region of the jet flow issuing from the multiple holes of the nozzle. Consequently, the high turbulent intensities and vorticity magnitudes lead to intensified mixing between the flue gas and the reducing agent. Hence, the most suitable molar ratio between NOx and the reducing agent for the catalytic reaction can be easily obtained within a shorter physical mixing length as a result of the enhanced scalar mixing. Finally, the numerical results were applied to a trial design version of a multihole nozzle, and this nozzle was experimentally tested to confirm its mixing performance.     

Oil/Suspended Particulate Material Interactions and Sedimentation

The interactions of physically dispersed oil droplets with suspended particulate material (SPM) can be important for the transport of bulk quantities of spilled crude oil and polycyclic aromatic hydrocarbons (PAH) to subtidal sediments. The literature regarding oil/SPM interactions is reviewed, and results from whole-oil droplet/SPM interaction kinetics and pure-component (Prudhoe Bay crude oil distillate cut) equilibrium partitioning experiments are presented. The effects of oil type, SPM characteristics, and salinity on the interaction rates are examined, and the importance of whole-oil droplet/SPM interactions on particle agglomeration and settling behavior are discussed. Whole-oil droplet/SPM interactions are retarded as oil droplet dispersion into the water column is inhibited by oil viscosity increases due to evaporation weathering and water-in-oil emulsification. Compared to whole oil droplet/SPM interactions, dissolved-component/SPM adsorption is not as significant for transport of individual components to sediments. The information presented in this paper can be used to augment computer-based models designed to predict oil-spill trajectories, oil-weathering behavior, and spilled oil impacts to the marine environment.     

干法烟气脱硫电除尘器进口喇叭的设计与应用

电除尘器进口喇叭的设计直接影响其气流均布。针对CFB—FGD干法烟气脱硫后的烟气特点，分析了处理脱硫后烟气的电除尘器进口喇叭设计，进行了气流分布试验，为高烟尘电除尘器进口喇叭的设计提供参考。     

烟气脱硫喷淋塔的容积负荷与本体设计

提出了以喷淋塔的容积负荷——平均容积吸收率为控制指标的本体设计路线。在目前已有的设计、运行经验基础上，根据烟气的SO2进口浓度、要求的吸收效率等来确定喷淋塔容积。讨论了容积吸收率不同角度的定义，给出了采用容积吸收率进行喷淋塔本体设计的步骤。     

脱硫系统GGH吹灰器高压水喷嘴改进

GGH堵塞是脱硫系统运行常见问题之一,介绍了通过扩大吹灰器高压水喷嘴口径,增加喷嘴射流流量,提高对脱硫系统GGH清洗效果的途径,并实现脱硫系统不开烟气旁路挡板进行GGH波纹板高压清洗的目的。     

Optimization of the food waste water incineration with respect to CO and NO<Subscript>x</Subscript> emission characteristics

The incineration of food waste water in conjunction with the domestic waste is getting attention as a food waste water treatment method, due to its low treatment cost and high efficiency. Many studies verified that the ammonia in the food waste water served as a reducing agent to suppress the generation of NO_x when the food waste water was injected and incinerated. However, they have not revealed the correlation between the change in the concentration of the CO and NO_x by the influence of the solid matters contained in the food waste water on the incineration of the wastes. The purpose of this study is to determine the optimum amount of the food waste water injected through four nozzles in the primary and secondary incineration chambers and to assess the correlation between the concentration of CO and NO_x in accordance with the food waste water injection in each chamber of the incinerator. For the study, four food waste water injection nozzles were installed; two (A and B) at the top of the primary incineration chamber and the other two (C and D) in the secondary incineration chamber. The correlation between the change in the concentration of CO and NO_x was studied adjusting the amount of the food waste water injected through the nozzles. From the result, Case II showed the concentration of CO and NO_x as 1.8–10 and 14–26 ppm, respectively, while Case I showed that of CO and NO_x as 15–30 and 9–18 ppm, respectively. Those levels are well below the Korean emission criteria, 50 ppm for CO and 80 ppm for NO_x. Based on the results, it is evident there is a certain trade-off between emission of CO and NO_x, and Case II which has relatively low concentration of CO is easier and cheaper to control.