共查询到19条相似文献,搜索用时 592 毫秒
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不久前,国家环境保护部以环函[2014]124号文"关于碱回收炉烟气执行排放标准有关意见的复函",答复江苏省环境保护厅《关于江苏王子制纸有限公司碱回收炉烟气执行排放标准问题的请示》中提到: 相似文献
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正本刊讯最近,国家环境保护部以环函[2014]124号文"关于碱回收炉烟气执行排放标准有关意见的复函",答复江苏省环境保护厅《关于江苏王子制纸有限公司碱回收炉烟气执行排放标准问题的请示》(苏环办〔2014〕141号),内容如下。造纸制浆过程中产生的黑液包含有机物(主要成分为木素、半纤维素等)和无机物,经蒸发浓缩后通过碱回收炉将其燃烧,产生蒸汽或发电。考虑到碱 相似文献
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Lind T Hokkinen J Jokiniemi JK Hillamo R Makkonen U Raukola A Rintanen J Saviharju K 《Environmental science & technology》2006,40(2):584-589
Fine particle emissions from combustion sources have gained attention recently due to their adverse effects on human health. The emission depends on the combustion process, fuel, and particulate removal technology. Particle concentrations at Kraft recovery boiler exits are very high, and the boilers are typically equipped with electrostatic precipitators (ESP). However, little data are available on the ESP performance in recovery boilers. Particle concentrations and size distributions were determined at two modern, operating recovery boilers. In addition, we determined the fractional collection efficiency of the ESPs by simultaneous measurements at the ESP inlet and outlet and the particulate emissions of trace metals. The particle mass concentration atthe ESP inlet was 11-24 g/Nm3 at the two boilers. Particle emissions were 30-40 mg/ Nm3 at boiler A and 12-15 mg/Nm3 at boiler B. The particle size distributions had a major particle mode at around 1 microm. These fume particles contained most of the particle mass. The main components in the particles were sodium and sulfate with minor amounts of chloride, potassium, and presumably some carbonate. The ESP collection efficiency was 99.6-99.8% at boiler A and 99.9% at boiler B. The particle penetration through the ESP was below 0.6% in the entire fume particle size range of 0.3-3 microm. Trace element emissions from both boilers were well below the limit values set by EU directive for waste incineration. 相似文献
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近10年来,国内浆厂碱回收随着企业产业结构的优化调整已向大、中型化发展,碱炉运行的经济性和可靠性是纸厂自备热电站选择蒸汽参数的主要出发点,文中针对国内大、中型木浆、草浆黑液碱炉在选择合适的蒸汽参数方面提供了一些比较与建议. 相似文献
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随着《锅炉大气污染物排放标准》(GB13271-2014)和《火电厂大气污染物排放标准》(GB13223-2011)的实施,大部分制糖企业须对蔗渣锅炉的除尘系统进行改造以使烟尘排放浓度达到新标准要求。本文结合蔗渣烟尘特点,引进具有相对投资成本少、劳动强度低、维护费用低、除尘效率高、无高温爆燃风险等优点的湿式静电除尘技术,介绍了其工作原理、结构及分类、关键技术及特点,并选用结构紧凑、安装体积小、耗水耗电少、占地面积少的立式蜂窝管湿式静电除尘器,安装于原有的水膜除尘器之后,用于蔗渣锅炉的二级精细高效除尘,结果显示:锅炉烟囱口(在线监测及取样分析)的烟尘平均排放浓度降至20 mg/m~3以下,符合新标准要求(烟尘浓度≤30 mg/m~3),榨季颗粒物排放削减率在60%以上,除尘效果显著。 相似文献
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Šyc M Horák J Hopan F Krpec K Tomšej T Ocelka T Pekárek V 《Environmental science & technology》2011,45(21):9427-9434
This study reports on the first complex data set of emission factors (EFs) of selected pollutants from combustion of five fuel types (lignite, bituminous coal, spruce, beech, and maize) in six different domestic heating appliances of various combustion designs. The effect of fuel as well as the effect of boiler type was studied. In total, 46 combustion runs were performed, during which numerous EFs were measured, including the EFs of particulate matter (PM), carbon monoxide, polyaromatic hydrocarbons (PAH), hexachlorobenzene (HxCBz), polychlorinated dibenzo-p-dioxins and furans (PCDD/F), etc. The highest EFs of nonchlorinated pollutants were measured for old-type boilers with over-fire and under-fire designs and with manual stoking and natural draft. Emissions of the above-mentioned pollutants from modern-type boilers (automatic, downdraft) were 10 times lower or more. The decisive factor for emission rate of nonchlorinated pollutants was the type of appliance; the type of fuel plays only a minor role. Emissions of chlorinated pollutants were proportional mainly to the chlorine content in fuel, but the type of appliance also influenced the rate of emissions significantly. Surprisingly, higher EFs of PCDD/F from combustion of chlorinated bituminous coal were observed for modern-type boilers (downdraft, automatic) than for old-type ones. On the other hand, when bituminous coal was burned, higher emissions of HxCBz were found for old-type boilers than for modern-type ones. 相似文献
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锅炉安装的质量好坏直接影响到锅炉设备能否达到设计的要求和投运后运行安全。本文从多维度论述了海天公司75吨循环流化床锅炉安装工程的质量管理,对锅炉安装工程中的质量管理有一定的指导意义,对行业内同类型的锅炉安装工程的质量管理也有借鉴作用。 相似文献
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提出并设计了在工厂燃煤锅炉供水系统中增加太阳能热水系统和保温储热水箱,并改进其自动控制装置的节能减排方案,通过理论分析和模型实验研究该方案的节能减排效果.研究结果表明:年节约燃煤费用占总投资的比例为9.3%左右,静态回收期为11 a;减少各类污染物排放的比例大约为4%,达到了预期的节能减排效果. 相似文献
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前一时期我公司锅炉间歇出现结垢爆管及腐蚀等故障,有人把原因归结为回收制盐Ⅱ效冷凝水作为锅炉用化学水造成的。本文从同行使用情况、公司化学水运行情况、设备操作维修及化学水制备设备等方面,分析化学水不合格原因,论证了Ⅱ效冷凝水质量能够完全满足锅炉用水要求。 相似文献