麻石水膜除尘塔的脱硫改造

目前,我国许多大中型锅炉采用麻石水膜除尘塔进行烟道气净化,并且取得了明显的除尘效果;但是随着全民环保意识的增强和国家环保标准的提高,原来的麻石水膜除尘塔已不能满足脱硫标准的要求。因此,对麻石水膜除尘塔进行治理改造,使之不但保留原来的除尘功能,而且还赋予较好的脱硫效果。本文将以某碱厂130t/h锅炉为例,论述对麻石水膜除尘塔脱硫改造的体会。     

固体电解质SO_2（SO_3）传感器测定烟道气中的SO_2

本文论述了利用北京科技大学研制的固体电解质ＳＯ２（ＳＯ３）传感器对测定烟道气中的ＳＯ２进行的研究。利用该传感器测定烟道气中的ＳＯ２，其测量范围为：５０—１７０００ｍｇ／ｍ３，相对标准偏差小于４．０％。因而具有测量范围宽，精确度高以及稳定性好的特点。设计的试验样机的总体噪声和漂移小于１．０ｍｇ／ｍ３，同时具有体积小．重量轻和操作简单的特点。     

烟道气的利用

本文叙述利用烟道气充填海上储油轮油舱的顶部,既保护了储油轮油舱的安全,又能变废为利,减少油舱顶部轻质成份的挥发损耗,也保护了环境。作者亲临兰水号储油轮考察了这个问题,从烟道气的用途入手,介绍烟道气的成份、净化和冷却流程,并对烟道气的输送以及烟道气的管理等进行了叙述,以兰水号储油轮利用烟道气为基础,写此文章供读者参考。     

粗媒体颗粒流化床半干法烟气脱硫

开发了粗媒体颗粒流化床半干法烟气脱硫技术。在流化床内加入惰性粗媒体颗粒，改善脱硫剂与烟气的接触。延长脱硫剂在床内的停留时间，促进脱硫反应进行，提高脱硫效率和脱硫剂利用率。以工业用石灰石为脱硫剂，实验研究了粗媒体颗粒的加入量及其他操作条件对此过程脱硫效率的影响。结果表明：随着粗媒体颗粒粒径减小及床内加入量增加，烟气脱硫效率提高；随着Ca／S增大、饱和接近度降低、空速及脱硫剂颗粒粒径减小，脱硫效率提高。当粗媒体颗粒的静止床高为122mm，饱和接近度为15～18℃、空速为2850h^-1、钙硫比为1．0—1．1、脱硫剂粒径为64μm时，脱硫效率可达90％以上。     

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。     

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。     

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.     

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.     

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。     

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。