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烧结烟气脱硫净化工程的最适宜技术选择 总被引:1,自引:0,他引:1
对冶金企业带式烧结机烟气净化工程所采用的技术路线进行了全面论述。根据烧结烟气有别于锅炉烟气的特点,强调贯彻"一机多效,协同减排"的原则,不可能照搬火电厂传统湿式脱硫和干式脱硝工艺,从当前的技术和经济发展水平出发,烧结烟气净化工程的最适用技术应当首选新型干法和半干法流程,如CFB(循环流化床法)、SDA(旋喷干燥法)和NID(新型一体化),此外,AC(活性炭/焦吸附法)和EBA(电子束-氨法)工艺也值得重视。对于大型带式烧结机,有必要采用烟气分割技术,有选择地实施部分烟气净化处理,既经济高效又可实现协同净化。 相似文献
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烟气脱硫是目前国际上广泛采用的控制二氧化硫的成熟技术,其中半干法烟气脱硫工艺在电厂烟气脱硫装置中占到20%~30%。该工艺的核心是将燃煤烟气绝热增湿,以促进氢氧化钙与二氧化硫反应而进行的。其衡量指标之一为烟气相对湿度,烟气湿度大,烟气脱硫效果好,但不利于烟气排放。为此,本文分析了相对湿度的概念、对脱硫的影响,同时分析了相对湿度对烟气监测的影响,并提出了相应的解决办法。 相似文献
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垃圾焚烧发电厂烟气净化工艺及应用 总被引:2,自引:0,他引:2
本文介绍了引进的西格斯烟气净化技术的工艺流程和技术特点,并就采用该技术建设的深圳某垃圾焚烧发电厂烟气排放指标和国家标准及实测值进行了比较。 相似文献
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通过对江汉油田现有锅炉及烟气治理状况的调查,分析找出存在的问题是:设备腐蚀严重及现有设备脱硫效率低。针对这种情况进行了新技术开发,克服现有装置的缺点。简述了技术原理及主要装置(喷雾脱硫塔与湿式除尘器)和工艺流程:吸收剂制备系统、烟气净化系统及废渣排出系统;对此技术的实验表明:外排烟气中烟尘浓度为152mg/m3,SO2浓度为142mg/m3,脱除效率分别达到96.59%和80.02%,达到预期效果 相似文献
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解析电除尘烟温与粉尘特性的最佳结合点 总被引:2,自引:0,他引:2
分析了电除尘烟温对粉尘特性的影响,以及烟温对电除尘器效率的影响,从中找出烟温调节与粉尘特性的最佳结合点。利用烟温调节的理念,应用余热利用节能电除尘技术对电除尘器进行提效改造,通过实例证明,这既可扩大电除尘器适应性和提高电除尘效率、满足低排放要求,又可节省电煤消耗和降低电耗,具有环保与经济的双重效益。 相似文献
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Florian Winkler Nicole Schoedel Hans-Jörg Zander Roland Ritter 《International Journal of Greenhouse Gas Control》2011
Flue gas purification is a necessary method to avoid emission of sour gases like SOx and NOx into the environment. Another important aspect is the zero CO2 emission from coal-fired power plants. Oxyfuel technology is one of the processes to reach this goal. LINDE KCA Dresden in cooperation with Vattenfall Europe is operating a pilot plant producing liquefied CO2. Product specification and material requirements make flue gas purification for the removal of SOx and NOx unavoidable. The new oxyfuel technologies offer new process conditions for flue gas purification which are not available at atmospheric conditions.At Linde laboratories, catalytic and non-catalytic DeNOx and DeSOx processes have been screened for oxyfuel application. After first feasibility studies, laboratory experiments and economic evaluations, it was decided to develop a process based on wet scrubber systems to remove NOx from flue gas, simultaneously producing ammonia nitrites which can be thermally decomposed into nitrogen in a second step. After demonstration of the single process steps on laboratory scale, a pilot scrubber was erected and commissioned in 2010 at Schwarze Pumpe Oxyfuel Pilot Plant. In September 2010, the successful completion of the pilot tests demonstrated the NOx removal efficiency of this technology. The data from the pilot plant tests have been used to finalise a kinetic model describing the NOx absorption behaviour regarding NOx removal rate and nitrite selectivity for demonstration of plant scale up. This DeNOx-process is now marketed under the name “LICONOX”. 相似文献
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面对当前汞污染日益严峻的趋势,分析了燃煤锅炉烟气其它污染物(如二氧化硫、氮氧化物、颗粒物)控制设施及其运行情况,结合所燃用的煤质情况,介绍了燃煤锅炉烟气汞减排各种经济实用的方法,以及选择汞排放控制措施的“抉择树”。根据燃煤锅炉烟气实际情况,确定可采用的汞减排控制技术,必要时采取活性炭喷射脱汞技术(ACI),最大限度地提高协同除汞效果。同时提出了应注重燃煤残留物中汞的二次污染问题。 相似文献
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《International Journal of Greenhouse Gas Control》2007,1(1):31-36
The dry sorbent CO2 capture process is an advanced concept to efficiently remove CO2 from flue gas with two fluidized-bed reactors. This paper summarizes the results of performance of the two fluidized-bed reactors in the continuous solid circulation mode to investigate the feasibility of using potassium carbonate-based solid sorbent (Sorb KX35). The parameters such as gas velocity, solid circulation, carbonation temperature, and water vapor content were investigated during several continuous operations of two fluidized-bed reactors. The CO2 removal increased as gas velocity was decreased and as solid circulation rate was increased. The CO2 removal ranged from 26% to 73% was rather sensitive to the water vapor content among other parameters. A 20 h continuous operation conducted in a bench scale fast fluidized-bed reactor system indicated that the spray-dried potassium-based sorbent, Sorb KX35 having superior attrition resistance and high bulk density, had a promising CO2 removal capacity of 50–73% at steady state and was able to regenerate and reuse. The results from this work are good enough to prove the concept of the dry sorbent CO2 capture process to be one of viable methods for capturing CO2 from dilute flue gas of fossil fuel-fired power plants. 相似文献
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