This paper describes the structure of the system for separating sulfur from flue gas and dust. In the paper, the velocities of turbulent flow and laminar flow inside the tower, the total of liquid membrance, and the a...This paper describes the structure of the system for separating sulfur from flue gas and dust. In the paper, the velocities of turbulent flow and laminar flow inside the tower, the total of liquid membrance, and the additional flow of rotation fogged fluid are calculated, and the separation of rotation air-solid affected by tower is analyzed. The velocity distribution in quasi free vortex area is obtained from experiment. The minimum separated particle diameter is computed. The paper also studies the chemical reactions of flue gas containing sulfide with the dynamic fogged sulfur separating agent and discusses the main factors related to the effect of separating sulfur and dust. At last, the applications of separating sulfur in industrial stove and collecting dust in environmental engineering are introduced.展开更多
Sand/dust test is one of the key projects to examine the environmental adaptability of ordnance equipment.In order to decrease the abrasion of test facility caused by the sand/dust particles,the particles contained in...Sand/dust test is one of the key projects to examine the environmental adaptability of ordnance equipment.In order to decrease the abrasion of test facility caused by the sand/dust particles,the particles contained in the airflowneed to be reclaimed effectively.Amathematical model of Useparator is established.The flowfield and the trajectories of particles inside the separator are obtained using a numerical simulation method,and the separation efficiency and pressure drop of separator with different rows of separate components are also obtained at various flowvelocities.The simulation results indicate that the efficiency of U inertia separator is affected by the flowvelocity evidently,and a reasonably designed separator can meet the requirement of the separation efficiency in particular situation.The results can be use as reference for the design and test of sand/dust separate systems.展开更多
为解决分离器长时间运行带来的分离效能偏差、人工维护频繁等问题,亟须一种无分离器的呼吸性粉尘浓度检测方法。根据光散射理论,数值模拟研究粉尘颗粒粒径与光散射特性的关系;研制高分辨率光散射样机,构建亚利桑那A1标准粉尘的试验系统...为解决分离器长时间运行带来的分离效能偏差、人工维护频繁等问题,亟须一种无分离器的呼吸性粉尘浓度检测方法。根据光散射理论,数值模拟研究粉尘颗粒粒径与光散射特性的关系;研制高分辨率光散射样机,构建亚利桑那A1标准粉尘的试验系统,研究不同粒径呼吸性粉尘的光散射特性;基于BMRC(British Medical Research Council,英国医学研究委员会)分离曲线,建立粉尘颗粒粒径与光散射特性相关的呼吸性粉尘浓度检测模型,初步形成无分离器的呼吸性粉尘浓度检测技术。试验验证发现:无分离器的呼吸性粉尘浓度检测技术能较准确检测的呼吸性粉尘浓度限值为55.2 mg/m^(3),检测误差为29.1%;该技术目前仅适用于低浓度下的呼吸性粉尘浓度检测。展开更多
This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted.CO–CO2 mixture gas was used as reducing agent,and the antim...This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted.CO–CO2 mixture gas was used as reducing agent,and the antimony-containing phase was reduced into Sb4O6,volatilized into smoke,and finally recovered through the cooling cylinder.The antimony recovery rate increased from 66.00 wt%to 73.81 wt%in temperature range of 650 to 800°C,and decreased with temperature increased further to 900°C due to the reduction of Sb4O6 to the nonvolatile Sb.Similarly,the CO partial pressure also played a double role in this test.Under optimized conditions of roasting temperature of 800°C,CO partial pressure of 7.5 vol%and roasting time of 120 min,98.40 wt%of arsenic removal rate and 80.40 wt%antimony recovery rate could be obtained.In addition,the“As2O3”product could be used for preparing ferric arsenate which realized the harmless treatment of it.展开更多
基金This project was supported by Guangdong Provincial Science and Technology Foundation (No. 980343).
文摘This paper describes the structure of the system for separating sulfur from flue gas and dust. In the paper, the velocities of turbulent flow and laminar flow inside the tower, the total of liquid membrance, and the additional flow of rotation fogged fluid are calculated, and the separation of rotation air-solid affected by tower is analyzed. The velocity distribution in quasi free vortex area is obtained from experiment. The minimum separated particle diameter is computed. The paper also studies the chemical reactions of flue gas containing sulfide with the dynamic fogged sulfur separating agent and discusses the main factors related to the effect of separating sulfur and dust. At last, the applications of separating sulfur in industrial stove and collecting dust in environmental engineering are introduced.
文摘Sand/dust test is one of the key projects to examine the environmental adaptability of ordnance equipment.In order to decrease the abrasion of test facility caused by the sand/dust particles,the particles contained in the airflowneed to be reclaimed effectively.Amathematical model of Useparator is established.The flowfield and the trajectories of particles inside the separator are obtained using a numerical simulation method,and the separation efficiency and pressure drop of separator with different rows of separate components are also obtained at various flowvelocities.The simulation results indicate that the efficiency of U inertia separator is affected by the flowvelocity evidently,and a reasonably designed separator can meet the requirement of the separation efficiency in particular situation.The results can be use as reference for the design and test of sand/dust separate systems.
文摘为解决分离器长时间运行带来的分离效能偏差、人工维护频繁等问题,亟须一种无分离器的呼吸性粉尘浓度检测方法。根据光散射理论,数值模拟研究粉尘颗粒粒径与光散射特性的关系;研制高分辨率光散射样机,构建亚利桑那A1标准粉尘的试验系统,研究不同粒径呼吸性粉尘的光散射特性;基于BMRC(British Medical Research Council,英国医学研究委员会)分离曲线,建立粉尘颗粒粒径与光散射特性相关的呼吸性粉尘浓度检测模型,初步形成无分离器的呼吸性粉尘浓度检测技术。试验验证发现:无分离器的呼吸性粉尘浓度检测技术能较准确检测的呼吸性粉尘浓度限值为55.2 mg/m^(3),检测误差为29.1%;该技术目前仅适用于低浓度下的呼吸性粉尘浓度检测。
基金Project(51564034)supported by the National Science Fund for Distinguished Regional Scholars,China
文摘This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted.CO–CO2 mixture gas was used as reducing agent,and the antimony-containing phase was reduced into Sb4O6,volatilized into smoke,and finally recovered through the cooling cylinder.The antimony recovery rate increased from 66.00 wt%to 73.81 wt%in temperature range of 650 to 800°C,and decreased with temperature increased further to 900°C due to the reduction of Sb4O6 to the nonvolatile Sb.Similarly,the CO partial pressure also played a double role in this test.Under optimized conditions of roasting temperature of 800°C,CO partial pressure of 7.5 vol%and roasting time of 120 min,98.40 wt%of arsenic removal rate and 80.40 wt%antimony recovery rate could be obtained.In addition,the“As2O3”product could be used for preparing ferric arsenate which realized the harmless treatment of it.
