共查询到20条相似文献,搜索用时 125 毫秒
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天峰公司硫酸厂现有2套制酸系统,一套为50 kt/a硫铁矿制酸系统,另一套为2003年3月建成投产的80 kt/a硫磺制酸系统。硫磺制酸系统用喷柴油方式对转化催化剂升温,耗柴油达30多t(不含烘、煮炉用油);当转化一段进口温度达418℃后,喷磺用二氧化硫炉气对转化升温,其间,不仅磺耗损失折酸达70多t,而且大量排放气严重污染环境。该系统7月中 相似文献
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本文在物料衡算的基础上整理了硫磺制酸尾气中二氧化硫与硫酸烟雾相对含量与绝对含量的计算公式,并分析了它们的影响因素与引起超标的原因。为了把尾气中的二氧化硫与硫酸烟雾控制在排放标准以内,本文从生产实践出发,提出了一些切实可行的对策与措施。干燥热空气间接升温法是控制二氧化硫与硫酸烟雾排放量的有效方法,本文对此作了探讨,并给出了比较具体的工艺流程、设备、操作步骤与方法,供设计时参考。 相似文献
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低浓度二氧化硫烟气制酸技术进展 总被引:2,自引:1,他引:1
介绍低浓度二氧化硫烟气制酸的技术进展。在间接制酸工艺方面,介绍了各种可将低浓度二氧化硫转化为适合于硫酸生产的高浓度二氧化硫的气体脱硫技术;在直接制酸工艺方面,介绍了低浓度二氧化硫的湿法制酸工艺、湿式氧化工艺和非稳态转化工艺。分析我国低浓度二氧化硫制酸技术面临的问题,提出改进意见。 相似文献
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介绍一种新的硫磺制酸系统干吸流程。干燥塔、二吸塔串接共塔,且与一吸塔共用循环槽、循环泵、即干燥塔的下塔酸直接引入二吸塔。进入干燥塔的空气在干燥的同时对二吸循环酸进行解吸,致使二吸循环酸二氧化硫平衡分压低于二转出口气体中二氧化硫分压,从而可以减少尾气的二氧化硫排放量。同时,对硫磺制酸干吸流程进行了评述,推荐采用新的干吸流程。 相似文献
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对于转化器用柴油直接升温,在国外的硫黄制酸系统早已采用,不过,不允许燃烧柴油的热烟气直接通入开始升温时的冷触媒。兹将美国Chemico 1942年在Norfolk建设的硫黄制酸系统开工说明中有关用柴油升温及停工的部分摘译如下: 相似文献
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采用CCP系统实现沸腾炉自动控制,大大减少了升华硫和酸雾的生成。 相似文献
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介绍了二氧化硫催化氧化生成三氧化硫的新工艺,其特点是反应温度低,采用有机溶剂洗涤,可得到较高的硫酸浓度,同时设备腐蚀小。该工艺有希望革新现有的硫酸生产工艺,尤其适用于处理二氧化硫的排放。 相似文献
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Teresa Miranda Sergio Nogales Silvia Román Irene Montero José Ignacio Arranz Francisco José Sepúlveda 《International journal of molecular sciences》2014,15(10):18349-18361
Biomass plays an important role as an energy source, being an interesting alternative to fossil fuels due to its environment-friendly and sustainable characteristics. However, due to the exposure of customers to emissions during biomass heating, evolved pollutants should be taken into account and controlled. Changing raw materials or mixing them with another less pollutant biomass could be a suitable step to reduce pollution. This work studied the thermal behaviour of olive pomace, pyrenean oak and their blends under combustion using thermogravimetric analysis. It was possible to monitor the emissions released during the process by coupling mass spectrometry analysis. The experiments were carried out under non-isothermal conditions at the temperature range 25–750 °C and a heating rate of 20 °C·min−1. The following species were analysed: aromatic compounds (benzene and toluene), sulphur emissions (sulphur dioxide), 1,4-dioxin, hydrochloric acid, carbon dioxide and nitrogen oxides. The results indicated that pollutants were mainly evolved in two different stages, which are related to the thermal degradation steps. Thus, depending on the pollutant and raw material composition, different emission profiles were observed. Furthermore, intensity of the emission profiles was related, in some cases, to the composition of the precursor. 相似文献
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介绍了第二次全国污染源普查硫酸行业开展相关工作的情况,对硫酸行业产污系数手册进行解读.与第一次全国污染源普查结果相比,第二次全国污染源普查硫磺制酸二氧化硫排污系数由1.47 kg/t下降到0.41 kg/t,硫铁矿制酸废水产生量和废水中砷含量也大幅降低,行业污染物减排工作取得较大成效.进一步分析了硫酸行业二氧化硫减排的... 相似文献
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介绍炼厂酸性气制硫酸装置的工艺过程。由于实供气源与设计值有较大出入,二氧化碳浓度偏高, 并且夹带烃类物质较多,使装置无法正常运行。通过对酸性气进行预处理后,一次开车成功,各项工艺指标均达到设计要求,遇酸性气流量突降时可补充适量硫磺,维持正常生产。 相似文献
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介绍了天福公司300 kt/a合成氨项目硫化氢酸性气回收处理的设计及运行情况。将天福公司的硫化氢酸性气送入瓮福集团硫铁矿制酸的沸腾炉直接燃烧。不但可减少H2S气体对环境的污染问题,而且硫资源得以回收利用。项目投资少,社会效益、经济效益可观,且能满足天福公司长周期稳定生产的需要。 相似文献
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Coke from Athabasca oil sands has limited use as a boiler fuel because of excessive emission of sulphur dioxide during combustion. When the oil sands bitumen is mixed with a small quantity of a suitable reagent such as calcium hydroxide and carbonized in a laboratory unit at ≈ 475 °C, the resultant coke has significantly reduced sulphur dioxide emission during combustion. The organic sulphur of the bitumen is converted to calcium sulphide and sulphate. Further, the addition of this reagent leads to a substantial increase in the yield of liquid products during carbonization. The calcium hydroxide may catalyse the cracking of asphaltenes thereby leading to the increased recovery of liquid distillate. 相似文献
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