长庆石化公司RO活性炭过滤器的现状及维护优化

本文介绍了长庆石化公司RO活性炭过滤器的基本原理,列出了设备检查和运行过程中常见的问题,并给予了解决方法,在启动前要检查填料和各阀门的开启情况,在运行过程中检查是否漏水,检查是否振动,检查各压力点以及正洗反洗时间。定期做好填料检查,孔密封垫检查,内部紧固件检查,内部清洗;对与常见问题也给予了解决方法。     

饮料废水深度处理技术与回用

随着人民生活水平的日益提高,对于生活环境的要求也越来越高,与之相反,随着工业文明的飞速发展,环境污染却日益加剧,水污染是环境污染的一大成因,如今,社会对于废水排放企业的关注和排污限制也越来越多,因此,废水经过深度处理,循环再利用,减少废水的排放及节约水资源是企业发展的必由之路。文章以上海申美饮料食品有限公司的废水深度处理与回用项目为案例,阐述曝气生物滤池+流砂过滤器处理饮料废水并回用的途径与办法。     

Three-stage aged refuse biofilter for the treatment of landfill leachate

A field-scale aged refuse(AR) biofilter constructed in Shanghai Refuse Landfill,containing about 7000 m3 aged refuse inside,was evaluated for its performance in the treatment of landfill leachate. This AR biofilter can be divided into three stages and can manage 50 m3 landfill leachate per day. The physical,chemical,and biological characteristics of AR were analyzed for evaluating the AR biofilter as leachate treatment host. The results revealed that over 87.8%-96.2% of COD and 96.9%-99.4% of ammonia nitrog...     

Invertebrate community characteristics in biologically active carbon filter

Biologically active carbon (BAC) system was set up in a water plant of South China during January to December 2007,to study the invertebrate community characteristics of BAC filter.Thirty-seven invertebrate species were found,of which 28 belonging to rotifers.Filter operation could lead to an output of invertebrates in high abundances with the filtrate,and the maximum density could reach 5608 individuals/m 3.Average abundances in the effluent water increased in 27-33 folds in comparison to the influent water during the sampling period.Invertebrate community succession had the following trend:filter-feeding animals → small benthic invertebrates → large benthic and resistant invertebrates.Abundances of large-sized invertebrates (copepod adult and oligochaete) at bigger-media column were significantly higher than that at small-media column.The results implied the abundant species diversity of invertebrate in BAC filter.The relationship between invertebrate and biofilm still remain to be studied in detail.     

Effects of continuously regenerating diesel particulate filters on regulated emissions and number-size distribution of particles emitted from a diesel engine

The effects of continuously regenerating diesel particulate filter (CRDPF) systems on regulated gaseous emissions, and number-size distribution and mass of particles emanated from a diesel engine have been investigated in this study. Two CRDPF units (CRDPF-1 and CRDPF-2) with di erent specifications were separately retrofitted to the engine running with European steady-state cycle (ESC). An electrical low pressure impactor (ELPI) was used for particle number-size distribution measurement and mass estimation. The conversion/reduction rate (RCR) of hydrocarbons (HC) and carbon monoxide (CO) across CRDPF-1 was 83% and 96.3%, respectively. Similarly, the RCR of HC and CO and across CRDPF-2 was 91.8% and 99.1%, respectively. The number concentration of particles and their concentration peaks; nuclei mode, accumulation mode and total particles; and particle mass were highly reduced with the CRDPF units. The nuclei mode particles at downstream of CRDPF-1 and CRDPF-2 decreased by 99.9% to 100% and 97.8% to 99.8% respectively; and the particle mass reduced by 73% to 92.2% and 35.3% to 72.4%, respectively, depending on the engine conditions. In addition, nuclei mode particles increased with the increasing of engine speed due to the heterogeneous nucleation initiated by the higher exhaust temperature, while accumulation mode particles were higher at higher loads due to the decrease in the air-to-fuel ratio (A/F) at higher loads.     

气水反冲洗工艺提高油田采出水过滤器再生效果

油田采出水中含有的聚合物容易导致颗粒滤料类过滤器中的滤料颗粒黏度升高、附着力增强,甚至形成板结块和滤饼层,难以通过单一的反冲洗方式进行再生.通过试验研究确定使用气水反冲洗再生技术,可有效地解决目前油田实际生产中存在的颗粒滤料污染后再生困难的技术难题,提高过滤后的水质,使滤后水质稳定达标,适应油田开发后期水质发生变化的特点.