焦化废水生物脱氮的试验研究

采用单相活性污泥法对焦化废水进行了试验研究。研究结果表明:当进水NH_3—N浓度为300mg/L左右,COD为1200～1500mg/L,酚浓度为100～380mg/L,CN~-为10～30mg/L,在系统总水力停留时间为27h和混合液回流比为400％的条件下,出水各项污染指标均达到国家排放标准。     

焦化废水生物处理技术研究

采用PACT—硝化—-反硝化工艺,处理焦化废水。结果表明,排放水的COD可降至100 mg/l、NH_3-N浓度可达15mg/l,基本达到排放标准。该工艺适合于现有焦化厂废水处理设备的改造。     

改性活性焦脱硫脱氮性能的研究

针对国内外烟气脱硫脱氮现状 ,研制出了以普通煤为主要原料 ,加入一定量金属氧化物制成改性煤质活性焦 ,并针对大气中主要气态污染物SO2 和NOx 进行了脱硫、脱氮性能的研究     

105万吨焦炉烟气脱硫脱硝除尘治理技术及应用

针对某企业焦炉烟气,新建一套脱硫脱硝除尘装置,焦炉烟气经过处理后,烟气中颗粒物、二氧化硫、氮氧化物以排放浓度满足《炼焦化学工业污染物排放标准》(GB16171-2012)大气污染物排放限值的要求。即:SO2排放浓度小于50mg/Nm^3,NOx排放浓度小于500mg/Nm^3,同时要求处理后烟气中颗粒物排放浓度小于30mg/Nm^3,氨含量排放浓度小于8ppm。     

提高焦化废水生化处理效果途径

结合国内外文献，对焦化废水中有害物质的去除问题进行了综合分析，从而提出了３种提高焦化废水生化处理效果的有效技术，１．延时曝气；２．ＡＳ－ＰＡＣＴ；３．强化处理。     

A1-A2- O生物膜系统处理焦化废水试验中好氧段影响因素的研究

试验采用A1-A2-O 生物膜系统处理焦化废水,对好氧段的影响因素进行了研究.结果表明,当好氧段HRT为28.1h, 出水pH值为7.7～8.0,剩余碱度为150～200mg/L,池中部加碱,进水C OD负荷＜0.22kg/m3·d,氨氮负荷＜0.05kg/m3·d时,系统对 COD和氨氮的去除率分别可达87%和98%,出水COD浓度平均低于150mg/L ,氨氮浓度低于15mg/L.     

冷切焦水处理工艺技术

在对比冷切焦水处理工艺的三种流程基础上，总结冷焦水密闭处理流程的优越性，对冷切焦水处理流程进行了一定程度的探讨。     

Waste plastics recycling process using coke ovens

The Japan Iron and Steel Federation (JISF), as its voluntary energy-saving action plan, proposed a 10% energy reduction by 2010 with 1990 as the basis. Further, it has suggested an additional 1.5% energy saving by the use of waste plastics as a metallurgical raw material. The amount of processing of waste plastics which corresponds to this amount of energy conversion is about 1 million t scale during 1 year. Conventional known methods for recycle-processing of waste plastics include, for example, the method of injection into a blast furnace to use waste plastics as an iron-ore reducing agent instead of coal. On the other hand, the coking process is considered to be suitable as a waste plastic recycling facility because the process involves coal carbonization in a high-temperature and reducing atmosphere. Carbonization tests with mixed waste plastics were conducted with laboratory equipment and in actual coke ovens. As a result, it was confirmed that the waste plastics recycling process using coke ovens is feasible. Therefore, a waste plastics recycling process using coke ovens was started as a chemical recycling technology at Nippon Steel.     

稠油废水处理工艺研究

介绍了稠油废水的来源与性质,提出3种处理技术,即"水解酸化-接触氧化-臭氧催化氧化",出水CODCr为48.6 mg/L,去除率达到86.55%,处理成本为6.03元/m3;"活性焦预吸附-厌氧-固定化微生物BAF-活性焦后吸附",出水CODCr为40.2 mg/L,去除率达到88.97%,处理成本为5.45元/m3;"强化絮凝-活性污泥MBR",出水CODCr为36.8 mg/L,去除率达到82.64%,处理成本为5.76元/m3。第2种工艺处理效率与处理成本略优。     

氧化塘深度处理焦化废水的初步研究

焦化废水经过常规的二级处理后,ＣＯＤ和ＮＨ３－Ｎ往往难到达到国家排放标准,以活性污泥法处理焦化废水的出水水质为依据,采用氧化塘深度处理焦化废水,其ＣＯＤ和ＮＨ３－Ｎ均可达到国家排放标准。因此,只要只要条件控制得当,运用氧化塘处理低浓度焦化废水可以获得较好处理效果。