Studying PGDS electric filters for removing high-ohmic magnesite dust

Conclusions Double-staged dust-extraction equipment based on NIIOGAZ cyclones of the type TsN-24 and electric filters PGDS-73-3 situated behind a rotary furnace (diameter 3.6 and length 90 m) for firing magnesite facilitated operations without a break in the health-safety norms for dust extraction.The optimum gas velocity in the cyclones in which their efficiency was about 90% is 7 m/sec. In this case there was no wear of the active part of the cyclones.The efficiency of the electric filter largely depends on the dust load on entry. With a reduction in the input dust concentration from 25.3 to 9.5 g/Nm³ the residual dust concentration is respectively reduced from 0.240 to 0.143 g/Nm³ with a water concentration in the raw material fed into the furnace of 1.2%.An increase in the moisture content of the raw materials to 2.5% causes a reduction in the resistivity of the dust from 10¹³ to 7·10¹¹ ·cm, and there is partial suppression of the back corona in the electric filter, as a result of which the residual dust concentration diminishes to 0.062 g/Nm³ which is less by a factor of 2 or more than the health-safety norms.Translated from Ogneupory, No. 7, pp. 18–25, July, 1970.     

Equipment for extracting magnesite dust from drying drums

Conclusions The dry method of purifying flue gases behind drying drums for drying magnesite, using group equipment of cyclones TsN-15 designed by NIIOGAZ, is effective, simple, and convenient.Translated from Ogneupory, No.1, pp.63–64, January, 1967.     

烧结金属除尘技术的研究进展

介绍一种高性能的过滤材料——烧结金属过滤材料及其特性。探讨了该过滤材料在除尘技术中的应用及其发展状况 ,对于烧结金属过滤式除尘的设计优化进行了初步研究 ,最后对该除尘技术的前景做了展望     

聚氯乙烯干燥系统尾气除尘工艺对比

介绍了湿式洗涤除尘工艺和袋滤器除尘工艺的核心设备和具体流程,比较了两种工艺应用在聚氯乙烯干燥尾气除尘方面的优缺点.     

锅炉烟气脱硫除尘与渣浆水的综合利用

介绍了锅炉烟气脱硫、除尘工艺的主要特点以及废渣浆水的综合利用，治理后的效果以及存在的主要问题。     

Elements of gas cleaning and dust removal systems lined with refractory concretes

Principles are considered for the construction of concrete linings for furnaces, gas ducts, cyclones and other elements of gas cleaning and dust removal systems subject to the action of high temperature, chemically corrosive gases, and abrasive wear. Examples are provided of manufacturing lined elements of gas cleaning systems made of refractory concretes in various branches of industry. __________ Translated from Novye Ogneupory, No. 11, pp. 15–19, November 2007.     

Making wall blocks for electric steel-smelting furnaces from magnesite chrome brick waste

Conclusions The wear resistance of wall blocks tamped from magnesite-chrome brick waste after service is not inferior to those made of magnesite powder.Ground chrome-magneslte and magnesite-chrome waste after service may also be used to make different furnace parts (channels, pseudo baffles, loading window covers, and so on).The use of the waste will make it possible to reduce the consumption of metallurgical magnesite powder.     

铁盐法电絮凝联合除砷工艺的应用

介绍包头华鼎铜业发展有限公司铜冶炼烟气制酸酸性污水的处理及回用情况。酸性污水主要特点是砷含量高,采用铁盐中和沉降、过滤、电絮凝、物理吸附联合除砷除杂后,得到的洁净水砷质量浓度0.3 mg/L,其他指标均达GB 25467—2010标准。污水处理后全部回收使用,实现冲地水、制酸污水零排放。     

钡盐生产中粗钡尾气除尘的探讨

钡盐生产中粗钡回转窑尾气含尘较多，直接排放不仅造成资源浪费，而且给环境带来污染，通过对几种除尘方法进行分析，着重推荐干湿法综合治理技术，使钡盐厂家取得较大的经济效益和社会效益。     

锅炉消烟除尘的影响因素

我公司采用的是3台35t抛煤机倒转炉排式锅炉,为了将烟气的排放浓度降低到环保要求（几2g／m3）,我们对该锅炉的燃烧状况进行了详细的分析,找出了锅炉消烟除尘的主要影响因素。1煤质对锅炉燃烧状况的影响我公司锅炉燃用煤种为烟煤,不同的烟煤影响到锅炉的燃烧状况和排烟浓度。（1）烟煤中挥发分的影响挥发分是入炉煤工业分析的一个重要指标,挥发分含量高,煤容易着火,且挥发分析出后,烟煤表面的孔隙增大,进而增大了烟煤与空气的接触面积,有利于煤的完全燃烧。但挥发分太高,容易出现化学不完全燃烧热损失,使排烟中的飞灰增多。因此…     

An approximate model for mass transfer with reaction inporous gas diffusion electrodes

An approximate model for reactant mass transfer in fuel cell electrodes has been formulated which considers gaseous diffusion in the hydrophobic Teflon phase, diffusion across a thin electrolyte film at the surface of the catalyst phase, and internal diffusion with first order reaction in the electrolyte-filled catalyst phase. An analytical solution is presented which indicates the fraction of the “activation only” current density that is obtained from the electrode. Application of this model for low reactant concentrations should allow a more quantitative evaluation of important mass transfer processes in fuel cell electrodes.