共查询到17条相似文献,搜索用时 31 毫秒
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资源回收型湿式氨法烟气脱硫技术 总被引:1,自引:0,他引:1
阐述了资源回收型湿式氨法烟气脱硫技术的原理和适用范围;介绍了该技术在电力行业、化工行业的应用情况及应用前景;指出回收型湿式氨法烟气脱硫工艺成熟、适用煤种广、脱硫效率高、运行稳定,其副产品硫酸铵的品质符合农用化肥标准,可完全满足农业应用要求,是一种可实现循环经济的绿色脱硫工艺。 相似文献
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氨法在烧结烟气脱硫中的应用 总被引:1,自引:1,他引:0
在钢铁工业排放的污染物中,烧结烟气中的二氧化硫和焦化废氨水等都是难以处理的污染物。利用焦化废氨水吸收烧结烟气中SO2的氨一硫铵工艺具有脱硫率高、运行可靠、投资低、副产品可以回收等优点,在脱硫的同时也去除了焦化废水中的氨污染,是一种以废治废、有应用前景的新方法。本文介绍了采用焦化废氨水吸收烧结烟气中的SO2的治污方法原理,并对其工艺流程、特点及运行费用等作了分析。 相似文献
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本文对氨电极测定空气中氨的方法进行了研究,确定了最佳分析条件。分析方法的精密度,其平均变异系数为47%;平均回收率为998%,测定结果与纳氏试剂比色法无显著性差异,该方法适用于空气中氨的测定。 相似文献
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本文介绍了沱江和釜溪河近年来的氨污染现状及危害,认为氨是应治理的首位污染物;简要分析了生物、化学、物理化学三类除氨方法的优缺点;着重介绍了吹脱法除氨技术,提出用吹脱法治理沱江和釜溪河的无机氨污染,并进行了上述各法的经济效益比较 相似文献
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A prerequisite for efficient ammonia removal in air stripping is that the pH of the liquid to be stripped is sufficiently high. Swine manure pH is usually around 7. At pH 7 (at 20°C), only 0.4% of ammonium is in ammonia form, and it is necessary to raise the pH of swine slurry to achieve efficient ammonia removal. Because manure has a very high buffering capacity, large amounts of chemicals are needed to change the slurry pH. The present study showed that efficient air stripping of manure can be achieved with a small amount of chemicals and without strong bases like NaOH. Slurry was subjected to aerobic biological treatment to raise pH before stripping. This facilitated 8 to 32% ammonia removal without chemical treatment. The slurry was further subjected to repeated cycles of stripping with MgO and Ca(OH)(2) additions after the first and second strippings, respectively, to raise slurry pH in between the stripping cycles. After three consecutive stripping cycles, 59 to 86% of the original ammonium had been removed. It was shown that the reduction in buffer capacity of the slurry was due to ammonia and carbonate removal during the stripping cycles. 相似文献
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Mulvaney MJ Cummins KA Wood CW Wood BH Tyler PJ 《Journal of environmental quality》2008,37(6):2022-2027
Atmospheric ammonia (NH(3)) is a concern because of its environmental impact. The greatest contribution to atmospheric NH(3) comes from agricultural sources. This study quantified NH(3) volatilization from cattle defecation and urination on pasture under field conditions in Auburn, Alabama. Treatments consisted of beef feces, dairy feces, dairy urine, and a control. The experiment was conducted during four seasons from June 2003 to April 2004. Fresh feces or urine was applied onto grass swards, and NH(3) volatilization was measured up to 14 d after application using an inverted chamber method. Dairy urine was the only significant source of NH(3). Ammonia nitrogen (N) loss differed among seasons, ranging from 1.8% in winter to 20.9% during the warmer summer months. Cumulative volatilization was best described in this experiment by the equation % NH(3)-N loss = N(max) (1 - e(-ct))(i). The highest rate of NH(3) volatilization generally occurred within 24 h. This study suggests that NH(3) volatilization from cattle urine on pasture is significant and varies with season, whereas NH(3) volatilization from cattle feces is negligible. 相似文献
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本文介绍了化肥厂实现废水零排放的经济效益分析;完善造气、合成氨和锅炉冷却水闭路循环系统,正确选用循环水药剂;改进脱盐水工艺,机泵密封冷却水和其他设备冷却水处理措施;如何搞好氨、水平衡,杜绝跑冒滴漏等问题。 相似文献