针对石油化工、精细化工等领域加氢反应过程中催化剂投加、输送、补充存在的粉尘泄漏、人工强度大、投加精度低、自动化水平不高等问题,介绍一种由青岛博纳德机械科技有限公司开发的新型加氢反应催化剂专用补充系统。系统由全自动化密...针对石油化工、精细化工等领域加氢反应过程中催化剂投加、输送、补充存在的粉尘泄漏、人工强度大、投加精度低、自动化水平不高等问题,介绍一种由青岛博纳德机械科技有限公司开发的新型加氢反应催化剂专用补充系统。系统由全自动化密闭倒料系统与自动加药装置高度集成,可实现催化剂颗粒密闭无尘倒料、自动溶解稀释、定量连续输送及分布式控制系统(Distributed Control System,DCS)远程智能控制。详细阐述系统结构组成、工作原理、工艺流程、控制方式及核心技术特点,并分析其在加氢反应生产中的应用优势与推广价值。实际应用表明,该系统可有效改善操作环境、提高催化剂利用率、提升加氢装置运行稳定性与安全性,具有显著的经济与环保效益。展开更多
At Kuwana illegal dumping site in Japan, where hazardous waste was illegally dumped, groundwater was severely contaminated by Volatile Organic Compounds (VOCs). Groundwater was already remedied by conducting Pump-and-...At Kuwana illegal dumping site in Japan, where hazardous waste was illegally dumped, groundwater was severely contaminated by Volatile Organic Compounds (VOCs). Groundwater was already remedied by conducting Pump-and-Treat (P&T) after containment of all the waste by vertical slurry walls from 2002 to 2007. However, 1,4-dioxane was detected in both waste and groundwater outside of slurry walls after it was newly added into Japan environmental standards in late 2009, which suggested that the walls did not contain 1,4-dioxane completely. Our previous study developed a model to predict the 1,4-dioxane distribution in groundwater after the previous remediation at the site. In this study, numerical simulation was applied for remediation planning at the site based on the concept of Verified Follow Up (VF-UP) that had been proposed as a new approach to complete remediation effectively with consideration of future risks. The amount of waste to be removed and pumping plans were discussed by numerical simulation to achieve the remedial objective in which 1,4-dioxane in groundwater outside of walls is remedied within 10 years and 1,4-dioxane spreading throughout the walls is prevented in the case where a portion of waste is remained. Firstly, the amount of waste to be removed considering pumping plans for P&T was determined by scenario analysis. As a result, at least two-third of waste should be removed by combining with P&T. However, if the waste is remained, future risks of 1,4-dioxane spreading through the slurry walls may occur. Our simulation suggested that groundwater within the remaining waste must be pumped up at least 20 m3/d for containment of 1,4-dioxane within the remaining waste. In conclusion, our numerical simulation determined the amount of waste to be removed and the pumping plans for P&T to achieve the remedial objective effectively considering future risks based on the concept of VF-UP.展开更多
文摘针对石油化工、精细化工等领域加氢反应过程中催化剂投加、输送、补充存在的粉尘泄漏、人工强度大、投加精度低、自动化水平不高等问题,介绍一种由青岛博纳德机械科技有限公司开发的新型加氢反应催化剂专用补充系统。系统由全自动化密闭倒料系统与自动加药装置高度集成,可实现催化剂颗粒密闭无尘倒料、自动溶解稀释、定量连续输送及分布式控制系统(Distributed Control System,DCS)远程智能控制。详细阐述系统结构组成、工作原理、工艺流程、控制方式及核心技术特点,并分析其在加氢反应生产中的应用优势与推广价值。实际应用表明,该系统可有效改善操作环境、提高催化剂利用率、提升加氢装置运行稳定性与安全性,具有显著的经济与环保效益。
文摘At Kuwana illegal dumping site in Japan, where hazardous waste was illegally dumped, groundwater was severely contaminated by Volatile Organic Compounds (VOCs). Groundwater was already remedied by conducting Pump-and-Treat (P&T) after containment of all the waste by vertical slurry walls from 2002 to 2007. However, 1,4-dioxane was detected in both waste and groundwater outside of slurry walls after it was newly added into Japan environmental standards in late 2009, which suggested that the walls did not contain 1,4-dioxane completely. Our previous study developed a model to predict the 1,4-dioxane distribution in groundwater after the previous remediation at the site. In this study, numerical simulation was applied for remediation planning at the site based on the concept of Verified Follow Up (VF-UP) that had been proposed as a new approach to complete remediation effectively with consideration of future risks. The amount of waste to be removed and pumping plans were discussed by numerical simulation to achieve the remedial objective in which 1,4-dioxane in groundwater outside of walls is remedied within 10 years and 1,4-dioxane spreading throughout the walls is prevented in the case where a portion of waste is remained. Firstly, the amount of waste to be removed considering pumping plans for P&T was determined by scenario analysis. As a result, at least two-third of waste should be removed by combining with P&T. However, if the waste is remained, future risks of 1,4-dioxane spreading through the slurry walls may occur. Our simulation suggested that groundwater within the remaining waste must be pumped up at least 20 m3/d for containment of 1,4-dioxane within the remaining waste. In conclusion, our numerical simulation determined the amount of waste to be removed and the pumping plans for P&T to achieve the remedial objective effectively considering future risks based on the concept of VF-UP.
