陶瓷窑炉烟气旋流雾化超洁净排放试验研究

针对陶瓷行业喷雾干燥塔和窑炉的烟气排放特点,运用旋流雾化技术,构建旋流雾化反应云动力场,基于雾化、湍流和凝并的作用下,提出了一种适应陶瓷窑炉烟气脱硫除尘一体化的处理方案。对某陶瓷窑炉进行改造试验,结果表明:喷雾干燥塔烟气出口SO2浓度由1 200 mg/m3降至5 mg/m3,粉尘浓度从36 mg/m3降至10 mg/m3;窑炉烟气出口SO2浓度由900 mg/m3降至5 mg/m3,粉尘浓度从50 mg/m3降至8 mg/m3,脱硫效率高达99.58%以上;与传统的湿法脱硫工艺相比,能耗降低67.08%,实现了陶瓷窑炉烟气的超洁净排放,具有较好的经济适用性,为推广陶瓷工业大气污染物治理技术提供了一种新思路。     

鞍钢鲅鱼圈7m焦炉烟气脱硫脱硝技术应用实践

介绍了鞍钢股份有限公司鲅鱼圈钢铁分公司炼焦部7m焦炉烟气排放现状,阐述了焦炉烟气脱硫脱硝技术的工艺选择、工艺原理和技术特点.通过应用SDS干法脱硫+布袋除尘+中低温SCR脱硝技术,焦炉烟气SO2和NOX排放浓度分别达到了8～10 mg/m3和100～120 mg/m3,颗粒物排放浓度<10 mg/m3,均符合国家超低排放标准要求,具有推广和借鉴意义.     

鲁宝环炉SNCR+SCR联合脱硝技术的应用研究

根据鲁宝环炉烟气温度特点、氮氧化物浓度及烟气量,研究确定了鲁宝环炉烟气采用SNCR+SCR联合脱硝工艺,脱硝剂采用尿素;并确定了脱硝装置设备组成和设备布置.根据鲁宝环炉压火、提温、空炉膛等炉况变化特点,分别建立SNCR脱硝及SCR脱硝控制模型对尿素溶液喷入量进行自动调节控制,使脱硝后NOx质量浓度保持稳定.鲁宝环炉烟气脱硝在选择性催化还原SCR脱硝装置基础上增加1套选择性非催化还原SNCR脱硝装置,烟气NOx质量浓度从300～500 mg/m3(波动大时高达800 mg/m3)降低到100 mg/m3以下,整体脱硝效率达到87％以上,脱硝前后颗粒物浓度没有增加,达到了第四时段排放标准要求.     

活性焦联合脱硫脱硝技术在焦炉烟气治理中的应用

文章介绍了八钢四座6.5m顶装焦炉烟气治理工艺采用的活性焦联合脱硫脱硝工艺,以及脱硝段采用CSCR(活性炭选择催化还原)技术。该烟气治理工艺投运后,烟气排放指标SO_2≤30mg/m~3,NO_X≤150mg/m~3。     

邢钢180m2烧结机烟气超低排放技术应用实践

为达到《关于推进实施钢铁行业超低排放的意见》(环大气[2019]35号)钢铁企业超低排放标准,邢台钢铁有限责任公司在原有SDA半干法脱硫和布袋除尘器装置之后,实施了一系列技术改造。增设SCR选择性催化还原脱硝装置,采用加热SCR脱硝工艺,包括烟气系统、GGH换热系统、烟气加热系统、SCR反应器系统、脱硝引风机以及电气系统、控制系统等。在基准氧含量为16%时,达到了烧结出口烟气中氮氧化物浓度≤50mg/m³、二氧化硫浓度≤35mg/m³、烟尘浓度≤10mg/m³,实现了烧结过程超低排放。     

高硫烧结烟气超低排放工艺技术选择及应用

本文通过对烧结烟气脱硫脱硝技术用于高硫烟气(SO₂质量浓度高)条件实现超低排放的可行性进行分析，筛选出用于高硫烧结烟气脱硫脱硝超低排放技术：石灰石-石膏脱硫+SCR脱硝。结合高硫烧结烟气特点，提出了一种适合的技术路线：电除尘+石灰石-石膏脱硫+非湿电式深度净化+一级烟气补热+GGH+二级烟气补热+中温SCR脱硝。基于该技术路线的超低排放工艺在高硫烧结烟气治理上进行了应用，处理后烟气中颗粒物、SO₂、NO_x的质量浓度分别为7.01、8.25、35.31 mg/Nm³,能够连续稳定实现超低排放。     

180 m2烧结机超低排放改造减排效果分析

为满足国家及地方有关钢铁行业超低排放改造要求,舞钢公司于2019年对180 m2烧结机进行超低排放改造,项目内容包括对烧结机机头原有除尘、脱硫设施进行升级改造,并新增SCR脱硝系统,改造完成后污染物排放浓度及排放量得到显著降低,烧结机机头烟气中颗粒物、二氧化硫、氮氧化物排放浓度分别低于5 mg/m3、30 mg/m3、...     

烧结烟气超低排放技术应用实践

为达到《关于推进实施钢铁行业超低排放的意见》(环大气[2019]35号)钢铁企业超低排放标准,西王金属科技有限公司在原湿式电除尘、石灰—石膏湿法脱硫、低温氧化法脱硝的基础上,实施了一系列技术改造。通过采用加热SCR脱硝、双塔双循环石灰—石膏法脱硫、高压脉冲电源双室四电场+湿式电除尘去除颗粒物、两降一升烟气消白工艺技术,在基准氧含量为16%时,达到了出口烧结烟气中氮氧化物浓度≤50 mg/m3、二氧化硫浓度≤35 mg/m3、烟尘浓度≤10 mg/m3,实现了烧结过程超低排放。     

烧结烟气SCR脱硝技术的应用实践

介绍了SCR脱硝技术在石横特钢新3~#烧结烟气中NO_x减排的应用,以及工艺控制方法、运行指标、存在的问题及对策等。通过对喷吹压力及频次、压差、反应温度等参数的合理控制,以及使用调质剂、严格控制碱金属含量等措施,烧结烟气中NOx排放浓度由350 mg/m~3降至50 mg/m~3以下,每年可减排氮氧化物约1 100 t,实现环保超低排放和设备稳定运行。     

SDS+SCR工艺在焦炉烟气脱硫脱硝中的应用

焦炉烟气中存在的大量SO2和NOx是形成酸雨和雾霾的主要污染物。为了落实当前环保生产的基本国策,对焦炉烟气进行脱硫脱硝除尘处理已成为各大企业的当务之急。主要研究了SDS干法脱硫+中低温SCR脱硝除尘工艺在实际工程中的应用,该工艺效率高,副产品少,抗冲击能力强,是目前国际上一种较为先进的焦炉烟气净化处理技术。采用SDS+SCR工艺对鞍钢股份有限公司炼焦总厂8号焦炉烟气进行脱硫脱硝处理,实际结果表明,当设备入口处焦炉烟气中SO2、NOx和粉尘的平均质量浓度分别为83.84、439.67和18.43 mg/m3时,出口处烟气中3种污染物的质量浓度分别低于30、150和5 mg/m3,满足GB 16171-2012中的排放要求。研究可以为焦化行业的污染物治理提供可鉴方案和经验。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.