水解-三相生物流化床处理生活污水的研讨

通过对水解－三相生物流化床处理生活污水的实验研究,以探求降低曝气池、水解池高度的可能性;同时对载体的沉降规律作动力学分析,建立载体免于流失的出流控制流速方程式,为设计运转提出理论依据。     

铁屑流化床预处理-催化氧化-混凝沉淀组合工艺处理有机硅废水

采用铁屑流化床预处理、负载活性炭催化剂催化氧化和混凝沉淀组合工艺处理有机硅废水。废水经铁屑流化床预处理后Cu^2＋的去除率达99．90％,COD去除率达23．9％;负载活性炭催化剂催化氧化的最佳工艺条件：催化剂质量浓度为0．5g/L,H202质量浓度为2400mg/L,不投加FeSO4,反应时间为60min,体系pH为3-4,COD去除率达82％。催化氧化后的废水经混凝沉淀处理,调节pn为8-9,可达标排放。     

MD三相流化床降解含酚废水的研究

以人工配制的含酚废水作为研究对象,观察新研制的ＭＤ三相流化床好氧化物处理含酚废水的效果。试验结果表明,在进水酚浓度为４１００ｍｇ／Ｌ时,ＭＤ三相流化同水酚浓度为２０ｍｇ／Ｏ－２５ｍｇ／Ｌ,其     

边流效应对固定床吸附容量的影响

以甲苯气体为例,低浓度有机污染物在活性炭固定床吸附器内受边流效应影响的吸附过程。结果表明,由于边流效应影响,吸附床层死层增加,吸附容量减少,对直径０．３６ｍ,高径比为２．５的固定床,固定床甲苯吸附量损失可达１．７８ｋｇ,吸附层高度损失０．１２ｍ。     

好氧生物流化床技术研究进展

对好氧生物流化床技术的工作原理和发展概况进行了简介,重点阐述了部分新型好氧生物流化床反应器的结构特点,并对好氧生物流化床技术存在的问题及发展前景做了研讨。     

沸腾炉大气污染物的生成与排放特征分析

以20台沸腾炉(功率小于等于60 MW)的燃料特性分析数据和大气污染物的排放实测数据为基础,利用统计分析方法,研究了燃烧过程中排放的颗粒物(PM)、SO_2和NO_x初始排放浓度的影响因素,分析了沸腾炉PM、SO_2和NO_x排放现状,探讨了我国中小型沸腾炉PM、SO_2和NO_x排放管理控制的潜力和可行性.实验结果表明:在锅炉运行负荷大于等于80%的条件下,中小型沸腾炉PM的初始排放浓度基本上不受锅炉出力、过量空气系数和燃煤灰分含量的影响;燃煤的硫含量越高,SO_2初始排放浓度越高;过量空气系数越大,燃煤挥发分越低,NO_x初始排放浓度越高.     

Experimental investigations on a forced convection solar air heater using packed bed absorber plates with phase change materials

In this work, the performance of a forced convection solar air heater was evaluated using using three packed bed absorber plate configurations and compared with flat absorber plate. The phase change material (paraffin wax) was packed in the pin-fin, trianglular and circular absorber plate configurations. The performance parameters such as, outlet air temperature, thermo-hydraulic efficiency, exergy efficiency and pressure drop were predicted and compared. The results showed that the packed bed absorber plate configurations using paraffin wax have higher outler air temperature in the range of 2–5°C with 3–40% higher thermo-hydraulic efficiency and 2–20% higher exergy efficiency when compared to flat absorber plate. However, the packed bed absorver plates have higher pressure drop when compared to flat absorber plate.     

An experimental study for H2S and CO2 removal via caustic scrubbing system

In this study, removal of hydrogen sulfide (H₂S) and carbon dioxide (CO₂) from simulated syngas has been studied on one column scrubbing system. Gas flow rate as a measure of gas residence time and superficial gas velocity, gas composition, inlet H₂S load, flow modes (countercurrent and cocurrent) and packing geometry were the parameters in the design and/or operation of an acid gas scrubber system. Better H₂S scrubbing efficiencies have been obtained in countercurrent flow mode than that of cocurrent flow mode. When accordingly designed, static mixer with its superior performance on H₂S removal overweighed to structured packings. The coexistence of CO₂ and H₂S has been shown to increase the sodium hydroxide (NaOH) consumption along the scrubber column thereby decreasing the H₂S removal efficiency at higher H₂S loads. The gas residence time as changing with the gas velocity was found to be more dominant on acid gas removal efficiency than the effect of superficial gas velocity within the experimented range. A gas residence times of equal or above 3 s were seemed to be closer to the optimum point.     

电改袋技术在CFB锅炉除尘系统改造中的应用

分析了CFB锅炉电除尘系统改造为袋式除尘器的技术方案。改造后,除尘器已经稳定运行半年多,各项技术指标均达到设计要求,环境效益与经济效益显著。