共查询到20条相似文献,搜索用时 125 毫秒
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小氮肥厂造气含氰废水的治理方法关地(沈阳市辽中化工总厂110200)1前言在我国氮肥工业中,小型氮肥厂约占94%,为合成氨产量的一半以上。我省的小氮肥厂数量多,分布广。每个县都至少有一家小氮肥厂,是以煤为原料。。以煤为原料的小合成氨厂吨氨排造气废水7... 相似文献
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苎麻脱胶废水采用物化-生化-深度处理工艺处理后,经验收监测COD去除率可达95.7%,废水水质达到《污水综合排放标准》GB8978—1996一级标准的要求。物化一生化一深度处理工艺处理苎麻脱胶废水技术可行、效果稳定。 相似文献
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调查分析了当前应用于中小型锅炉湿法除尘废水循环回用治理的技术,根据除尘废水循环回用后的水质和工艺特点,提出将除尘循环水净化同燃煤烟气脱硫除尘联合进行以及利用工业碱水,炉渣处理除尘废水的技术和工艺 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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阐述了脱硫废水中污染物的去除机理,介绍了化学-机械沉降去除脱硫废水中悬浮物、重金属元素等物质的废水处理工艺,并对脱硫废水处理系统的优化设计进行了重点论述。 相似文献
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碱性工业废水的治理技术 总被引:3,自引:0,他引:3
本文介绍了利用我国目前大量排放的印染、造纸等碱性工业废水进行中小型燃煤锅炉烟气脱硫的技术。该技术投资少、运行费用低,具有较好的经济效益 相似文献
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The goal of this paper is to find methodologies for removing a selection of impurities (H2O, O2, Ar, N2, SOx and NOx) from CO2 present in the flue gas of two oxy-combustion power plants fired with either natural gas (467 MW) or pulverized fuel (596 MW). The resulting purified stream, containing mainly CO2, is assumed to be stored in an aquifer or utilized for enhanced oil recovery (EOR) purposes. Focus has been given to power cycle efficiency i.e.: work and heat requirements for the purification process, CO2 purity and recovery factor (kg of CO2 that is sent to storage per kg of CO2 in the flue gas). Two different methodologies (here called Case I and Case II) for flue gas purification have been developed, both based on phase separation using simple flash units (Case I) or a distillation column (Case II). In both cases purified flue gas is liquefied and its pressure brought to 110 atm prior to storage.Case I: A simple flue gas separation takes place by means of two flash units integrated in the CO2 compression process. Heat in the process is removed by evaporating the purified liquid CO2 streams coming out from both flashes. Case I shows a good performance when dealing with flue gases with low concentration of impurities. CO2 fraction after purification is over 96% with a CO2 recovery factor of 96.2% for the NG-fired flue gas and 88.1% for the PF-fired flue gas. Impurities removal together with flue gas compression and liquefaction reduces power plant output of 4.8% for the NG-fired flue gas and 11.6% for the PF-fired flue gas. The total amount of work requirement per kg stored CO2 is 453 kJ for the NG-fired flue gas and 586 kJ for the PF-fired flue gas.Case II: Impurities are removed from the flue gas in a distillation column. Two refrigeration loops (ethane and propane) have been used in order to partially liquefy the flue gas and for heat removal from a partial condenser. Case II can remove higher amounts of impurities than Case I. CO2 purity prior to storage is over 99%; CO2 recovery factor is somewhat lower than in Case I: 95.4% for the NG-fired flue gas and 86.9% for the PF-fired flue gas, reduction in the power plant output is similar to Case I.Due to the lower CO2 recovery factor the total amount of work per kg stored CO2 is somewhat higher for Case II: 457 kJ for the NG-fired flue gas and 603 kJ for the PF-fired flue gas. 相似文献
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The thief process for mercury removal from flue gas 总被引:1,自引:0,他引:1
Granite EJ Freeman MC Hargis RA O'Dowd WJ Pennline HW 《Journal of environmental management》2007,84(4):628-634
The Thief Process is a cost-effective variation to activated carbon injection (ACI) for removal of mercury from flue gas. In this scheme, partially combusted coal from the furnace of a pulverized coal power generation plant is extracted by a lance and then re-injected into the ductwork downstream of the air preheater. Recent results on a 500-lb/h pilot-scale combustion facility show similar removals of mercury for both the Thief Process and ACI. The tests conducted to date at laboratory, bench, and pilot-scales demonstrate that the Thief sorbents exhibit capacities for mercury from flue gas streams that are comparable to those exhibited by commercially available activated carbons. A patent for the process was issued in February 2003. The Thief sorbents are cheaper than commercially-available activated carbons; exhibit excellent capacities for mercury; and the overall process holds great potential for reducing the cost of mercury removal from flue gas. The Thief Process was licensed to Mobotec USA, Inc. in May of 2005. 相似文献