Experimental study on MSW gasification and melting technology

In order to develop municipal solid waste (MSW) gasification and melting technology, two preliminary experiments and a principle integrated experiment were fulfilled respectively. The gasification characteristics of MSW are studied at 500-750℃ when equivalence ratio (ER) was 0.2-0.5 using a fluidized-bed gasifier. When temperature was 550-700℃ and ER was 0.2-0.4, low heat value (LHV) of syngas reaches 4000-12000 kJ/Nm3. The melting characteristics of fly ash were investigated at 1100-1460℃ using a fixed-bed furnace. It was proved that over 99.9% of dioxins could be decomposed and most heavy-metals could be solidified when temperature was 1100-1300℃. The principle integrated experiment was carried out in a fluidized-bed gasification and swirl-melting system. MSW was gasified efficiently at 550-650℃, swirl-melting furnace maintains at 1200-1300℃ stably and over 95% of fly ash could be caught by the swirl-melting furnace. The results provided much practical experience and basic data to develop MSW gasification and melting technology.     

流化床锅炉溢流渣余热回收和冷渣的综合利用

介绍了流化床锅炉溢流渣余热利用和冷渣变废为宝的途径。     

流化床CuO烟气脱硫试验研究

介绍了流化床ＣｕＯ烟气脱硫试验，分析了Ｃｕ／Ｓ摩尔比、床高、进口烟气中ＳＯ２浓度和床温对脱硫效率的影响。     

流体化床Fenton深度处理合成制药废水研究

采用流体化床Fenton装置深度处理合成制药废水,通过正交试验确定了处理合成制药废水的最佳条件是HRT为20min,初始pH值为4.0,H2O2/CODcr（质量比）为4.0,H2O2/Fe2＋（摩尔比）为15,且在最佳条件下出水CODcr稳定在80mg/L以下,可以达到《污水综合排放标准》（GB8979-1996）一级标准。同时将其与标准Fenton氧化法进行对比试验,结果显示流体化床FentonCODcr去除率可提高13%以上,污泥产生量可降低70%,运行成本可减低28%,稳定运行成本可以控制在3.0元/吨废水以内。     

悬浮填料生物流化床在城镇污水厂的应用

采用悬浮填料生物流化床对城镇生活污水进行处理,通过调试掌握该工艺的技术控制要点,并对该工艺去除污染物的效果进行分析。实践应用表明,该装置能有效去除生活污水中的BOD、COD、NH3-N、TP、SS等污染物成分,出水水质达到《生活杂用水标准》的相关排放标准,并取得了良好的经济和环境效益。     

温度对一体式厌氧流化床膜生物反应器运行效能及微生物群落结构的影响

本研究采用一体式厌氧流化床膜生物反应器（integrated anaerobic fluidized-bed membrane bioreactor,IAFMBR）处理含苯并噻唑的高浓度合成废水,考察了温度变化（35、25和15℃）对反应器运行效能,膜污染情况和微生物群落结构的影响.结果表明,温度下降对反应器运行效能和膜污染情况产生不利影响.当温度从35℃下降到15℃时,COD去除率下降7.4%,苯并噻唑去除率下降49.2%,挥发酸总量上升225.66 mg·L^-1,甲烷产率（以CH₄/COD_removed计）下降0.118m³·kg^-1.膜污染周期从5.2 d下降到2.5 d.对于滤饼层而言,达到膜污染时,SMP（soluble microbial product）的质量浓度从42.47 mg·L^-1上升到70.62 mg·L^-1,EPS（extracellular polymeric substance）的含量（以VSS计）从46.30 mg·g^-1上升到82.22 mg·g^-1;对于混合液而言,SMP的质量浓度从36.46 mg·L^-1上升到69.35 mg·L^-1,EPS的含量从47.47 mg·g^-1上升到81.63 mg·g^-1.蛋白质是EPS和SMP的主要成分,约占总成分的80%.微生物群落结构表明,Firmicutes（厚壁菌门）和Chloroflexi（绿弯菌门）始终是最优势的菌门,占全部菌门相对丰度的42.6%~61.0%.随着温度的下降,优势菌属分别是Clostridium（13.7%）,Levilinea（15.2%）和Lactococus（17.9%）.产甲烷古菌的优势菌属始终是Methanosaeta.     

用硫铁矿烧渣生产氧化铁黄新工艺

利用硫铁矿烧渣氨法生产氧化铁黄的新工艺,采用流态化还原技术处理硫铁矿烧渣,并在生产铁黄的二步氧化过程中运用文氏管射流氧化技术.     

流化床反应器石灰石固硫特性研究

采集了兖矿地区华聚能源各电厂附近的6种石灰石,在流化床反应器中对其进行固硫实验,研究探讨了石灰石品种、粒径及脱硫温度对石灰石固硫性能的影响.实验结果表明,兖矿地区石灰石粒径小于1.5 mm时,最佳脱硫温度在900℃左右.当粒径小于0.5 mm时,石灰石的钙利用率最高可达43.86%,并且钙利用率对温度的敏感度较高,不同...     

Combined Non-Catalytic Reduction of NOx and SO2 by Ammonia Liquor during Staged Fluidized-Bed Combustion

Emissions of NOx and SO2 were monitored in the presence of ammonia liquor in a 0.09 m2 and 2 m high stainless-steel fluidized-bed combustor. Experiments were carried out at 2 m/s fluidizing velocity, 40% excess air, and 870 °C bed temperature. Ammonia liquor with 7% ammonia by weight was injected into the freeboard of the combustor 52 cm above the distributor through a water-cooled injector. A 65 : 34 primary/secondary air ratio was maintained throughout the investigation. Approximately 70% of NO and 20% of SO2 was reduced at an NH3/NO molar ratio of 2 : 1, respectively. However, a higher reduction in SO2 emissions (62%) was achieved at a very high NH3/NO molar ratio of 7 : 1. These experiments showed that ammonia addition did have a significant effect in SO2 reduction if injected in an excess amount. The injection of ammonia liquor combined with staged combustion was found to be very effective in reducing NOx emissions. A reduction of about 50% was achieved at an NH3/NO molar ratio of 0.6 : 1 which is also coupled with a very low level of ammonia in the flue.     

生物流化床在废水处理中的研究进展与前景

概括了生物流化床工艺的发展和工艺特点,对近年来出现的几种新型生物流化床的研究进展作了介绍,并展望了生物流化床技术的发展方向和应用前景.同时提出了生物流化床在实验研究与应用中尚须解决的问题.