共查询到19条相似文献,搜索用时 343 毫秒
1.
2.
3.
4.
生物膜填料塔启动及烟气脱硫研究 总被引:5,自引:1,他引:5
进行了生物膜填料塔挂膜启动及烟气脱硫实验研究。循环液的Fe2+的氧化速率与吸光度有明显的相关性,同时,压力损失和pH也是挂膜启动完成的重要指标。通入低浓度SO2气体驯化后,脱硫率可达到90%以上,Fe2+氧化速率维持在0.2g/(L.h)左右,连续保持7d,挂膜启动完成。脱硫实验结果表明,在SO2入口质量浓度小于2 000m g/m3、喷淋液中Fe2+浓度大于或等于0.06m o l/L、喷淋率约为12L/(m3.h)、空塔气速约为0.15m/s的条件下,脱硫率可达96%以上。当喷淋液循环使用7次后,必须补充新鲜营养液,以保证较高的脱硫率。 相似文献
5.
6.
采用自制喷淋塔进行湿法同时脱硫脱硝实验,在乙二胺四乙酸(EDTA)络合亚铁吸收液及半胱氨酸络合亚铁吸收液的基础上,研制出复合吸收液。实验结果表明:对于单一络合物吸收液,EDTA络合亚铁吸收液的脱硝效果较好,可在70 min内保持60%以上的NO脱除率,而半胱氨酸络合亚铁吸收液则可长时间保持较好的脱硫效果,可在180 min内保持90%以上的SO_2脱除率;复合吸收液的脱硫脱硝性能较单一络合物吸收液有明显提高,在络合物浓度为0.05 mol/L、吸收液pH为8、EDTA与半胱氨酸的摩尔比为1∶2、Fe~(2+)浓度为0.075 mol/L的优化条件下,90 min内的NO脱除率基本保持在70%以上,SO_2脱除率基本达到100%。 相似文献
7.
8.
以纯SO2及燃煤电厂烟气作实验气,利用积分法固定床CFB方式进行了DS-Ⅰ型催化剂与活性炭催化性能的对比试验,对不同还进行了不同烟气温度、SO2浓度、湿度、烟气流速等工艺参数对DS-Ⅰ型催化剂催化性能的影响试验。对不同催化剂进行优化组合,可在除尘器后直接脱硫、脱氮、其脱硫率达86%、脱氮率达68%。催化剂经再生,可反复使用。 相似文献
9.
10.
在脱硫脱硝喷淋装置上采用氨法-络合法处理工业烟气。考察了吸收液pH、Fe(Ⅱ)EDTA浓度、初始烟气浓度、液气比对烟气同时脱硫脱硝效果的影响。实验结果表明:吸收液的酸碱度通过影响Fe(Ⅱ)与EDTA的络合形式进而影响NO去除率;SO_2去除率主要受吸收液pH和初始SO_2质量浓度的影响;当吸收液pH大于8、吸收液Fe(Ⅱ)EDTA浓度大于0.100 mol/L、初始SO_2质量浓度小于1 500 mg/m3、初始NO质量浓度为1 200 mg/m3时,SO_2去除率均在95%以上,NO去除率为54%;当液气比由1 L/m3增大至4 L/m3时,有效脱硫时间和有效脱硝时间分别增长了7 min和4 min。 相似文献
11.
12.
废气中的NO和SO2可通过钴氨吸收液去除,但钴氨吸收液中的Co~(2+)易被氧化成Co~(3+)而失去脱硝能力。为了实现Co~(2+)的再生,采用酒石酸溶液对活性炭进行改性,提高其对Co~(3+)的催化还原能力,考察了活性炭催化剂改性及活化条件对钴氨吸收液Co~(3+)还原率及NO去除率的影响。实验结果表明:在酒石酸溶液浓度为1.5 mol/L、改性时间为18 h、活化温度为400℃、活化时间为4 h的条件下,改性活性炭的催化性能最佳;Co~(3+)还原率为67.5%,比原炭提高了11.9百分点;对应的钴氨吸收液的NO去除率为86.0%,比原炭提高了26.0百分点。pHpzc测定、Boehm滴定和BET表征结果表明,与原炭相比,改性活性炭酸性增强,羧基和内酯基含量增加,微孔数目增加,比表面积增大。这些表面特性的改变使改性活性炭的催化性能得到改善。 相似文献
13.
14.
Liu ZS 《Waste management (New York, N.Y.)》2008,28(11):2329-2335
Activated carbon fibers (ACFs) were used to remove SO(2) and NO from incineration flue gas. Three types of ACFs in their origin state and after pretreatment with HNO(3), NaOH, and KOH were investigated. The removal efficiencies of SO(2) and NO were determined experimentally at defined SO(2) and NO concentrations and at temperatures of 150, 200 and 260 degrees C. Experimental results indicated that the removal efficiencies of SO(2) and NO using the original ACFs were <56% and <27%, respectively. All ACFs modified with HNO(3), NaOH, and KOH solution could increase the removal efficiencies of SO(2) and NO. The mesopore volumes and functional groups of ACFs are important in determining the removal of SO(2) and NO. When the mesopore volumes of the ACFs are insufficient for removing SO(2) and NO, the functional groups on the ACFs are not important in determining the removal of SO(2) and NO. On the contrary, the effects of the functional groups on the removal of SO(2) and NO are more important than the mesopore volumes as the amount of mesopores on the ACFs is sufficient to remove SO(2) and NO. Moreover, the removal efficiencies of SO(2) and NO were greatest at 200 degrees C. When the inlet concentration of SO(2) increased to 600ppm, the removal efficiency of SO(2) increased slightly and the removal efficiency of NO decreased. 相似文献
15.
以某医药企业产生的含铝废盐酸为原料制备了液体聚合氯化铝(PAC)。确定了适宜的有机物去除方法和碱化剂,考察了碱化剂投加量、废盐酸铝离子含量等合成条件对PAC产品指标的影响,并比较了自制PAC和市售PAC对该企业污水站二沉池出水的混凝效果。实验结果表明:采用活性炭吸附法去除废盐酸中有机物,选择固体Ca O作为碱化剂,在活性炭投加量1‰(w)、吸附时间1 h、铝离子含量9.5%(w,以Al_2O_3计)、CaO投加量80 g/L、反应时间24 h的条件下,制备的液体PAC达到行业标准HG/T 2677—2017《工业聚氯化铝》中的Ⅲ类标准;自制PAC对废水COD和SS的去除率均优于市售PAC,不仅可替代其使用,还可外售产生经济效益。 相似文献
16.
17.
18.
19.
Agricultural solid waste for the removal of organics: adsorption of phenol from water and wastewater by palm seed coat activated carbon 总被引:3,自引:0,他引:3
Rengaraj S Moon SH Sivabalan R Arabindoo B Murugesan V 《Waste management (New York, N.Y.)》2002,22(5):543-548
Adsorption studies for phenol removal from aqueous solution on activated palm seed coat carbon (PSCC) were carried out under varying experimental conditions of contact time, phenol concentration, adsorbent dose and pH. Adsorption equilibrium was reached within 3 h for phenolic concentrations 10-60 mg l(-1). Kinetics of adsorption obeyed a first order rate equation. The percent removal remained constant over the pH range 4-9 for a phenolic concentration of 25 mg (l-1). The equilibrium data could be described well by the Freundlich isotherm equation. The adsorption of phenol on PSCC follows the film diffusion process. A comparative study with a commercial activated carbon showed that PSCC is two times more effective than commercial activated carbon. The studies showed that the palm seed coat carbon can be used as an efficient adsorbent material for the removal of phenolics from water and wastewater. 相似文献