共查询到19条相似文献,搜索用时 62 毫秒
1.
焦化冷焦水处理技术研究 总被引:1,自引:0,他引:1
针对延迟焦化装置冷焦水的污染问题,提出了由水--水混合器注水降温技术、重力沉降技术、旋流分离技术、空冷器技术集成的“冷焦水密闭循环处理技术”,该技术具有良好的工业应用价值。 相似文献
2.
3.
4.
5.
6.
7.
对利用双极膜水解离技术处理谷氨酸水溶液的各种工艺参数进行了探索。讨论了电流效率、转化率及能耗等因素对双极膜水解离技术应用的影响。根据实验研究结果 ,提出了双极膜法处理谷氨酸水溶液的最佳工艺流程 相似文献
8.
9.
10.
11.
James E. Carson 《Journal of the Air & Waste Management Association (1995)》2013,63(7):523-528
Concern for the biological and ecological effects of heated water has resulted in legal actions that will prevent power companies from dumping the waste heat from the majority of their new generating units into rivers and lakes. Many nuclear- and fossil-fueled plants now under construction, and even some now online, are being required to change from once-through cooling systems to other methods, such as wet cooling towers, cooling ponds, and spray canals, despite higher costs and lower thermal efficiencies. Yet, these alternate cooling procedures are not without their own environmental problems. The primary weather change due to once-through cooling on a large water body is a small local increase in fogginess at the plant outfall. But the relative probability of significant local meteorological effects is much higher with alternate cooling procedures, since these reduce the area of heat and moisture transfer. It is therefore concluded that, from a meteorological point of view, the least undesirable way to dispose of waste heat is by using once-through cooling on large water bodies. 相似文献
12.
13.
针对电厂循环冷却排污水的处理技术进行了中试研究。采用超滤、反渗透的工艺处理电厂循环冷却排污水,处理后的水能够满足低压锅炉补充水的要求。该工艺为循环冷却排污水的再利用开辟了一条新途径,既节约了水资源,又减少了环境污染。 相似文献
14.
现代化农业温室的夏季降温研究及其发展 总被引:2,自引:0,他引:2
本文阐述了夏季温室的常用降温方法,并加以简要的比较,提出了超声波雾化加湿在夏季农业温室降温中的应用和其控制方法,预测今后农业温室降温的发展趋势。 相似文献
15.
Mark L. Kramer Maynard E. Smith Michael J. Butler David E. Seymour Theodore T. Frankenberg 《Journal of the Air & Waste Management Association (1995)》2013,63(6):582-584
Measurements of natural draft cooling tower plume behavior, as well as meteorological variables, were obtained from aircraft flights near major power plants of the American Electric Power System. Persistence of the visible plume to great distances depends essentially on ambient humidity. Atmospheric stability at plume elevation was also important. Cooling tower-induced fog at ground-level was never observed in any of the tests, and aerodynamic downwash of the visible plume was absent also. The cooling towers did cause modification of natural clouds and they occasionally shadowed some local areas from the sun. Merging of the stack and cooling tower plumes was a common occurrence. 相似文献
16.
目前工业循环水处理技术主要有药剂处理、磁化处理和臭氧处理,其中药剂处理最为常用。近年来,药剂作用机理研究日趋深化,药剂合成、检验与复配技术也得到较大发展;同时,水处理技术的发展为循环水水质稳定技术注入了新的活力,磁化处理、臭氧处理技术也相继运用到工业循环水处理技术中来,并取得了较好效果。 相似文献
17.
Gräfen M Hesse K Pollkläsner D Baumann W 《Environmental science and pollution research international》2003,10(5):301-307
According to directive 93/67/EEC of the European Commission, this paper deals with the generic exposition evaluation of the environmental concentration of cooling Lubricant chemicals from the metal working industry into the hydrosphere. After considering the relevant life-cycle steps and the selection of a representative point source for the 'reasonable worst case', the emission per day Elocal(water) is determined. It leads to the predicted environmental concentration (PEClocal(water)) for the local stage in the compartment water. In order to gain the PEClocal(water) for an example--a corrosion inhibitor as additive in a cooling lubricant--, the relevant emission paths and the corresponding representative point source are described for the reasonable worst case. For non-water-miscible cooling lubricants, none of the operations in the life cycle leads to a release into the compartment water. To evaluate the hazard potential for cooling lubricant chemicals, the complete risk assessment has to be done. Also, the assessment has to be done for all high production volume chemicals, new substances and existing hazard chemicals. This means that even industrial categories like chemicals used in the textile industry or biocides and others have to be evaluated. 相似文献
18.
In a laboratory-scale combustion reactor, flue-gas samples were collected at two temperatures in the post-combustion zone, 700 °C and 400 °C, using two different water-cooled sampling probes. The probes were the cooled probe described in the European Standard method EN-1948:1, referred to as the original probe, and a modified probe that contained a salt/ice mixture to assist the cooling, referred to as the sub-zero probe. To determine the efficiency of the cooling probes, internal temperature measurements were recorded at 5 cm intervals inside the probes. Flue-gas samples were analyzed for polychlorinated dibenzo-p-dioxin and dibenzofurans (PCDD/Fs). Samples collected at 700 °C using the original cooling probe showed higher concentrations of PCDD/Fs compared to samples collected using the sub-zero probe. No significant differences were observed between samples collected at 400 °C. The results indicated that artifact formation of PCDD/Fs readily occurs during flue-gas sampling at high temperatures if the cooling within the probe is insufficient, as found for the original probe at 700 °C. It was also shown that this problem could be alleviated by using probes with an enhanced cooling capacity, such as the sub-zero probe.Although this may not affect samples collected for regulatory purposes in exit gases, it is of great importance for research conducted in the high-temperature region of the post-combustion zone. 相似文献