共查询到19条相似文献,搜索用时 203 毫秒
1.
火电厂排放的二氧化硫形成的酸雨已严重危害人类的生存环境,国家由此重新修订了(火电厂大气污染物排放标准),严格了火电厂SO2排放的控制要求,强制要求火电厂必须安装烟气脱硫装置。本文从我国实际情况出发.比较分析了干法、半干法和湿法脱硫技术工艺,提出了适合有色金属企业一氧化铝厂配套建设的热电厂的烟气脱硫方法。 相似文献
2.
3.
随着燃煤火电厂超低排放改造的推进,大多数燃煤火电厂在湿法脱硫后取消了烟气再热系统,使得湿法脱硫后设备常年处于腐蚀性很强的湿烟气环境中。钛材因其优良的耐腐蚀性能,在火电厂湿烟气环境中得到广泛应用,但同时也存在一些问题。为此,对钛材在火电厂湿烟气工程中应用的现状进行了分析,认为钛材在燃煤火电厂湿烟气中具有很好的应用前景,但是需要严格控制材料的加工工艺及安装水平,以确保其耐腐蚀性能的长期稳定可靠。通过分析钛材在燃煤火电厂湿烟气环境中应用存在的问题,对今后发展提出了相关建议。 相似文献
4.
5.
6.
7.
8.
9.
10.
11.
山西关铝75kA预焙槽在电力紧张的趋势下,采用“避峰填谷”用电方式取得了良好的经济技术指标。 相似文献
12.
13.
G. H. Wagner 《工业材料与腐蚀》1989,40(12):703-715
Flue gas desulfurization — a challenge to materials technology Since July 1st, 1988, within the Federal Republic of Weinheim the emission of SO2 from all fossil fired power stations having a thermal output of more than 300 MW is limited to max. 400 mg/m3 of flue gas. In the last years all bigger power plants, especially also the already existing ones, had to be equipped with flue gas desulfurization (FGD) plants. Mostly “wet washing processes” were chosen for technical realization. Mainly such processes were selected, where the SO2-gas is absorbed as gypsum by lime solutions or limestone suspensions. In the so-called Wellman-Lord-process SO2 is absorbed by a sodium sulfite solution. The sodium hydrogensulfite formed can be decomposed to the primary components by heating and concentrating rendering SO2 industrially usable. In this case at least it is necessary to clean the flue gases by a water wash first. Fossil fuels consist of a lot of elements besides of inflammable matters. Therefore, flue gases can contain nearly all the natural elements of the periodic system in different concentrations. Especially below the flue gases' dew point, very aggressive conditions to all materials are created by compounds of sulphur and all halides. Different solutions can be chosen to solve the given problems in the different areas of such plants with respect to materials, such as coatings or coverings on unalloyed steel (organic coatings with different fillers, rubber lining, eventually with supplementary coffering with heat resisting stones), high alloyed corrosion resistant steels and nickel base alloys, or also glas fiber reinforced resins (GRP). They have been applied in different installations. Using as an example the Wellman-Lord-process, which was chosen in the FGD-plants of the Ludwigshafen and Marl power stations of BASF, results of materials testing are described which led to an original solution to build such plants. Service experience of several FGD-installations shows: sorrow workman-ship, and its consistent control is the more important the more materials characteristics are close to the border lines. 相似文献
14.
随着铝合金在现代制造业中的应用越来越广泛,铝焊接烟尘及其危害逐渐引起了人们的关注.介绍了铝焊接烟尘的产生机理、主要排放物、影响因素及其规律、扩散规律等特性,分析了铝及其焊接烟尘对人体的危害,并提出一些降低铝焊接烟尘排放量、加强人体防护的措施. 相似文献
15.
介绍了电解铝厂配电网系统和用电设备的节电运行技术及应用,分析了调压整流机组经济运行技术、低电压偏差运行技术、配电网重构技术的节电原理。指出了在电解铝厂发展节电运行技术的重要性。 相似文献
16.
电解铝行业是高能耗高污染的行业,提高电解烟气的集气效率和净化效率成为减少目前电解铝行业环境污染的关键。本文就电解铝厂电解烟气净化系统集气效率和净化效率的问题,结合实际运行情况,提出一些关于净化系统的观点,以共同探讨提高铝电解烟气净化系统集气效率和净化效率的方法。 相似文献
17.
18.
废铝在回收熔炼过程中,产生大量烟尘,其成分复杂,处理难度大。了解烟尘的特点,合理选择收尘设备及处理工艺,掌握好几个重要环节,才能使系统安全有效地运行。介绍了废铝熔炼过程的烟尘特点、烟尘排放标准、烟尘处理技术。 相似文献
19.
通过对山西关铝公司三个电解系列的整流供电系统及世界范围内铝电解用供电电源各部分发展沿革技术分析.得出采用直降式晶闸管整流系统是电解铝生产工艺的理想供电方式的结论. 相似文献