利用燃煤锅炉烟道气处理工业废水的理论与实践

阐述了燃煤锅炉烟道气的主要化学成分及处理废水的机理,介绍了锅炉烟道气处理废水的研究与应用.     

煤调湿技术在国内的应用

煤调湿技术是基于煤干燥发展而来的量化炼焦煤水分的控制技术,是将炼焦煤在装炉前通过间接或者直接的换热方式去除一部分水分,使装炉煤水分含量稳定在6%左右,然后装炉炼焦。采用该技术能在保持焦炭质量不变的前提下,多配弱粘结煤7%~10%。煤调湿技术能够稳定焦炉生产操作及增产、节能、提高焦炭质量、减少环境污染等。世界上,日本的煤调湿技术一直处于领先水平,约85%的焦化厂都采用煤调湿技术。特别是其第三代煤调湿技术,工艺流程更短、传热效果更好、构造简单、运行稳定。日本室兰厂就是采用第三代煤调湿技术。我国的煤调湿技术的研发始于20世     

烟道气测定中压力对测定结果的影响

文章论述了烟道气成份测定要在正压条件下进行,在负压状态下需通过物料衡算求得其浓度。     

消除及回收烟气中SO2的糠醛渣活性炭研究

利用糠醛渣废料研制成一种新型改质炭(简称渣炭),采用温度程序脱附(TPD),色谱质谱连用(GC-MS),比表面测定(BET),静态与动态吸附以及二氧化硫氧化反应等方法,对渣炭的物化性质进行表征,并与几种商品炭进行比较;考察其反应条件,表明该渣炭无需添加任何活性组分便具有良好的脱硫性能,适用于烟气脱硫制酸过程。认为渣炭上某些羟基及羰基表面基团是脱硫活性中心,丰富的中孔有利于反应扩散。在烟气量5000Nm~3/h的中试装置上,于空速500h~(-1)。入口烟温70℃以及二氧化硫浓度1500—2500ppm的条件下,对工业放大渣炭进行验证,连续累计操作6000多小时,二氧化硫消除率约70％及副产硫酸的浓度约30％,并且,该渣炭的成本可以比碘炭降低40％左右。     

日本专业机构及科研单位的大气污染源监测技术

该文对日本专业监测评价公司的大气固定污染源监测技术的现状及特点进行评述,着重论述烟道气颗粒物等速采样的最新技术及设备。将各种类型的大气污染源采样技术进行分类比较,同时探讨专业监测机构及科研单位如何根据不同目的合理选择使用不同类型仪器设备的方法。      

烟道气中二氧化硫监测质量控制探讨

通过对碘量法测定烟道气中二氧化硫在布点,采样,样品保存等方面的分析,找出了二氧化硫监测结果产生误差的原因,提出了改进方法,进而提高监测数据的准确性和可靠性。     

锅炉烟道气脱硫除尘超重机的工程应用

中小型锅炉烟道气脱硫除尘超重机是一种新型的高效脱硫除尘一体化技术,该设备体积小、效率高,操作方便、维修简单。在此论述中小型锅炉烟道气脱硫除尘超重机的工程原理和设计方案,讨论在设计和操作过程中存在的一些主要问题及解决措施。     

燃煤电厂锅炉烟道气监测有关问题的研究

通过对以往烟气监测资料的分析,找出了烟气流速与锅炉负荷的关系,并用实例数据进行了验证。     

Decomposition characteristics of toluene by a corona radical shower system

Non-thermal plasma technologies offer an innovative approach to decomposing various volatile organic compounds(VOCs). The decomposition of toluene from simulated flue gas was investigated using a pipe electrode with nozzles for the generation of free radicals. Corona characteristics and decomposition of toluene were investigated experimentally. In addition, the decomposition mechanism of toluene was explored in view of reaction rate. The experimental results showed that the humidity of additional gas has an important effect on corona characteristics and modes and stable streamer corona can be generated through optimizing flow rate and humidity of additional gas. Applied voltage, concentration of toluene, humidity of toluene and resident time are some important factors affecting decomposition efficiency. Under optimizing conditions, the decomposition efficiency of toluene can reach 80%. These results can give a conclusion that the corona radical shower technology is feasible and effective on the removal of toluene in the flue gas.     

Removal of NOx from flue gas with radical oxidation combined with chemical scrubber

In this paper, removal of NOx(namely DeNOx) from flue gas by radical injection combined with NaOH solution(26% by weight of NaOH in water) scrubbing was investigated. The experimental results showed that the steady streamer corona occurs through adjusting the flow rate of the oxygen fed into the nozzles electrode. The vapor in the oxygen has influence on the V-I characteristics of corona discharge. Both HNO2 and HNO3 come into being in the plasma reactor and the DeNOx efficiency in the plasma reactor is more than 60%. The overall DeNOx efficiency of the whole system reaches 81.7 % when the NaOH solution scrubbing is collaborated.