共查询到20条相似文献,搜索用时 156 毫秒
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德士古碳黑过滤工艺简介玄恩锋(吉林化学工业公司化肥厂,吉林,132021)德士古碳黑回收技术有石脑油萃取和碳黑过滤两种方法。对于以渣油为原料的合成氨项目,选择碳黑过滤技术,尽管渣油耗量稍高,但不需要石脑油,氧耗也低,使得德士古整个装置的投资降低。过滤... 相似文献
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叙述在我国大化肥第1套Shel气化工艺碳黑回收装置中,稳定优化控制碳浆浓度及碳黑回收各个系统,实现一次试车成功及系统平稳运行的效果。 相似文献
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叙述在我国大化肥第1套Shell气化工艺碳黑回收装置中,稳定优化控制碳浆浓度及碳黑回收各个系统,实现一次试车成功及系统平稳运行的效果。 相似文献
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Shell气化工艺碳黑回收问题探讨张金勇(齐鲁石化公司第二化肥厂,淄博,255400)齐鲁二化甲醇系统以Shell渣油气化工艺为基础,该装置采用石脑油萃取碳黑并全部返回气化炉。但由于原设计及操作等原因,该系统自开车伊始便成为装置长周期运行的一大障碍,... 相似文献
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Shell工艺改沥青原料后碳黑回收方案分析 总被引:1,自引:0,他引:1
叙述了Shell工艺原料由渣油改为脱油沥青后,碳黑回收方案的改进要求及试验情况,并对几种方案 进行了适应性对比分析。 相似文献
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1 工艺原理及流程简介Shell碳黑回收是 Shell气化工艺的配套装置 ,气化反应在生成原料气的同时生成 380 kg/h的碳黑 ,约占渣油总量 1 % (质量百分比 )。为了降低环境污染、减少原料消耗 ,此部分碳黑需经碳黑回收装置回收送气化利用。1 .1 工艺原理Shell气化反应生成的碳黑具有较强的亲水性 ,原料气经水洗涤后形成浓度为 0 .74% (设计值 )的碳浆 ,由于碳黑的亲油性大于亲水性 ,碳浆与适量石脑油混合后萃取形成 Φ1~ 3mm的碳黑球。碳黑球经分离后混入渣油中送回气化炉作为原料 ,以达到回收利用。1 .2 流程简介Shell碳黑回收装置分为三个… 相似文献
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过滤-树脂吸附法处理焦化废水的研究 总被引:7,自引:0,他引:7
采用高温炉渣过滤 ,再用南开牌 H - 10 3大孔树脂室温下以 4BV/h流速吸附处理含酚 5 2 0 mg/L、COD 32 0 0 m g/L的焦化废水 ,调节废水 p H值为 6 ,处理体积为 6 0 BV ,处理出水酚含量≤ 0 .5 m g/L ,COD≤ 80mg/L ,达到国家排放标准。选用 0 .5 BV甲醇做脱附剂 ,室温下以 2 BV/h流速进行洗脱再生 ,脱附率达 99%以上。经 10 0次循环使用 ,树脂性能不变。脱附剂脱附达饱和后 ,再通过蒸馏回收甲醇和其中的酚 ,残渣进行焚烧处理 相似文献
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The D301R resin was screened to separate DSD acid from DSD acid wastewater. The effect of pH, temperature and time on adsorption behavior was investigated. Batch experiments indicated that the COD removal ratio of DSD acid wastewater was over 86%, and the COD of treated wastewater was under 100 mg/L at appropriate operating conditions. The results of column dynamic adsorption and regeneration showed that COD could be efficiently removed by the D301R resin from DSD acid wastewater, and the resin was easily regenerated by NaOH stripping. 相似文献
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本研究采用改性硅藻土处理乙烯废碱液,通过单因素实验,考察了改性硅藻土处理乙烯废碱液的吸附温度、吸附时间、改性硅藻土加入量和乙烯废碱液的pH对乙烯废碱液中硫去除率的影响,确定了改性硅藻土处理乙烯废碱液的最佳工艺条件。实验结果表明,其最佳工艺条件:吸附时间为40 min、吸附温度为20℃、改性硅藻土加入量为1.5 g、乙烯废碱液的pH为3。在此条件下,乙烯废碱液中硫浓度由560.4 mg/L降到29.4 mg/L,硫去除率达94.75%;乙烯废碱液的COD由148000 mg/L降到12000 mg/L,COD去除率达91.89%,改性硅藻土在乙烯废碱液处理方面具有很好的应用前景。 相似文献
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选用大孔阴离子树脂对硫酸锰溶液中的氯离子进行了静态和动态的吸附实验研究,结果表明,在pH=6.5~7.0,氯离子含量为1.53 g/L的条件下,树脂对Cl-有良好的吸附性能,氯的交换容量为20.3 mg/g湿树脂,吸附的氯离子可用0.5 mol/L的稀硫酸解吸,解吸率可达97.4%。 相似文献
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以增塑剂废水为研究对象,采用"预处理+树脂吸附+硫酸盐还原相UASB+微氧曝气+产甲烷相UASB+生物接触氧化+混凝沉淀"的集成工艺,研究该集成工艺的处理效果。结果表明:树脂吸附系统对COD和邻苯二甲酸的去除率分别为98.65%和96.59%,集成工艺出水COD为62~122 mg/L,NH3-N为5.8~9.6 mg/L,SS为19~45 mg/L,出水水质满足《污水综合排放标准》(GB 8978—1996)一级标准。该集成工艺可以有效回收邻苯二甲酸,削减废水中的有机物和氨氮含量。 相似文献
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利用泥炭为原料制备出腐殖酸树脂,在动态条件下,研究了腐殖酸树脂对重金属离子Zn^2+、Ni^2+的吸附效果及吸附条件。结果表明,在20℃,流速为4mL/min,pH值为5.0~7.0,含Zn^2+、Ni^2+浓度分别为70mg/L的废水经过腐殖酸树脂处理,Zn“、Ni。’去除率可达98%以上,且处理后的废水pH值近中性。含Zn^2+、Ni^2+浓度分别为32.5mg/L和29.4mg/L,pH值为5.9的电镀废水经腐殖酸树脂处理后,废水中Zn^2+、Ni^2+含量明显低于国家排放标准。 相似文献
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Performances of combined adsorption and chemical precipitation were evaluated as one of the options for pretreatment or post-treatment
of a municipal solid waste (MSW) landfill leachate and leachate from an industrial solid waste landfill. The COD and color
removals of the leachate from a MSW landfill were 35% and 33% at an alum dose of 300 mg/L with preceding PAC (powdered activated
carbon) dose of 200 mg/L, respectively. For MSW leachate, the combined adsorption and coagulation process showed 2.3 times
higher COD removal at PAC dose of 200 mg/L and alum dose of 500 mg/L than the unit process of adsorption with poor settleability.
The COD removal was accomplished mainly by adsorption, while coagulation was a key mechanism of color removal. The COD and
color of the biologically treated leachate from an industrial solid waste landfill were removed up to 32% and 68%, respectively,
at addition of 490 mgAlum/L and 1,000 mgPAC/L in adsorption-coagulation process with pH control. Combined adsorption and coagulation
process with pH control showed better COD and color removal than the process without pH control. The color removal was influenced
greatly by pH control, while COD removal was not. No difference in removal efficiency was observed between adsorption-coagulation
and coagulation-adsorption. Maximum net increases in the COD and color removals by the adsorption-coagulation process were
40% and 46%, respectively, compared with the removals by sole chemical precipitation. The Freundlich isotherm exclusively
described the adsorption of leachate components on the PAC. Thus, a combined adsorption and coagulation process was considered
to be effective for pre-treatment or post-treatment of landfill leachate, and has distinct features of simple, flexible, stable
and reliable operation against fluctuation of leachate quality and flowrate. 相似文献