共查询到20条相似文献,搜索用时 109 毫秒
1.
高硫煤中有机硫赋存状态与微生物脱硫机理 总被引:3,自引:0,他引:3
根据中国工业面临的煤炭脱硫形势,阐述现有煤炭脱硫方法与效果、高硫煤中有机硫赋存状态与微生物脱硫原理,并指出煤炭脱硫技术存在的问题及开发研究方向。 相似文献
2.
镁法烟气脱硫技术在燃煤电厂的应用 总被引:1,自引:0,他引:1
以华能辛店电厂氧化镁法烟气脱硫工程为例,介绍了镁法烟气脱硫技术在燃煤电厂中的应用,指出氧化镁烟气脱硫技术适合高硫煤烟气脱硫项目,符合国家循环经济发展要求,对改变我国脱硫行业过于单一地采用石灰石/石膏(钙)法脱硫工艺现状具有现实意义. 相似文献
3.
介绍了“双控单循环湿式石灰-石膏抛弃法”烟气脱硫技术的工艺流程、特点和在32t/h锅炉上的应用实验。该技术特别适用于高硫煤烟气脱硫,脱硫效率高、投资省、运行费用低,符合我国国情。 相似文献
4.
5.
6.
7.
8.
9.
10.
由于SCR脱硝的大规模应用,尽管脱硫实施超低排放之后SO_2得到有效控制,但烟气中的SO_3浓度反而成倍增长,尤其在燃用高硫煤的电厂,烟囱SO_3远远超过SO_2的排放水平。烟气中的SO_3浓度过高,会引起大气环境污染,并严重影响电厂机组的正常运行和经济运行。文章以西南地区某电厂2×600MW机组为例,介绍了燃煤电厂烟气SO_3的形成及危害,硫酸氢铵ABS的形成,"前端"烟气SO_3脱除技术原理,重点阐述"前端"烟气SO_3脱除产生的协同经济效益。对今后同类机组烟气SO_3的控制具有参考和借鉴作用。 相似文献
11.
12.
我国煤炭开采和燃烧过程中的硫污染对土壤环境的影响 总被引:15,自引:0,他引:15
我国煤炭在开采和燃烧过程中形成的硫污染物主要是酸性矿井水和二氧化硫,由煤炭燃烧造成的硫的干湿沉降以及煤炭开采过程中形成的酸性矿井水使土壤的物理化学性质发生变化,从而对土壤造成严重的破坏。主要表现在造成土壤中可溶性硫酸盐的大幅度升高;引起土壤的pH值下降;植物营养元素特别是K、Na、Ca、Mg等产生淋失;活性铝溶出量增加;有毒重金属活化;抑制土壤酶的活性等方面。可以通过脱硫除尘、加强绿化、建立合理的工业布局、加入土壤改良剂等措施来减少硫污染物的排放量和改善其对土壤环境的影响,但总量控制是关键,是最根本的途径。 相似文献
13.
European work on the application of biotechnology to processing various coals is reviewed and set within a wider context. Both U.S. and European work are discussed. In connection with work on microbial desulphurisation, European effort, particularly that centred on Delft University in the Netherlands, has concentrated on looking towards practical plant designs based on kinetic reaction data obtained in the laboratory. The question of desulphurisation looks rather different from a European (and world) perspective, compared with the situation in the U.S. There are, for example, several countries with high sulphur, low rank coals, where a higher proportion of the sulphur is present in organic form.While the work on pyrite removal has been well documented and has been replicated by different workers, that on organic sulphur removal is at a much earlier stage. In the U.K., work is going on to enhance the physical separation processes currently used in coal cleaning, using micro-organisms to alter the surface properties of various particles during flotation. This approach has the possibility of relatively short-term application and low capital costSome fundamental studies looking for organisms to attack and degrade the coal molecule, particularly in the F.R.G., have been based on bituminous coal. This contrasts with U.S. work which has met with some success with lignites and weathered lignite in the form of leonardite.The use of biotechnology in connection with coal must be looked at principally as a potential long-term development. The inherent problems associated with the nature of coal must be recognised but research work is already demonstrating possibilities that even 5 or 10 years ago would have been discounted. With advances in analytical techniques, one of the first benefits to be gained may well be a better knowledge and understanding of coal structure from looking at its degradation products. 相似文献
14.
15.
16.
17.
在分析我国煤炭资源状况、煤中硫的赋存状态和燃煤引起的SO2污染状况的基础上,探讨了国内外控制SO2排放的研究现状,研究了燃烧前、燃烧中和燃烧后三大类脱硫方法的可行性与适用范围。研究认为,对洗选脱硫要先对煤中硫的赋存状态进行研究,否则效率难以得到保证;固硫剂脱硫比较适合我国国情,但脱硫效率有待提高。固硫剂脱硫和洗选脱硫可结合使用,以提高脱硫率。 相似文献
18.
湿法烟气脱硫技术的比较与选择 总被引:2,自引:0,他引:2
本文综合评述几种典型的烟气脱硫技术,比较各种烟气脱硫技术的特点和应用经济性,并分析了钙法脱硫技术和镁法脱硫技术实际应用的情况。结果表明在当前众多的烟气脱硫技术中,镁法烟气脱硫技术经济、脱硫效率高、污染少、无二次污染,必将成为今后烟气脱硫技术发展的主要趋势。 相似文献
19.
Coal mine methane (CMM) released during coal mining attributes to unsafe working conditions and environmental impact. China, the largest coal producer in the world, is facing problems associated with CMM such as fatal gas accidents and intense greenhouse gas emission along the path to deep mining. Complicated geological conditions featured with low permeability, high gas pressure and gas content of Chinese coal seams have been hindering the coal extraction. To solve these problems, a model of coal–methane co-exploitation is proposed. This model realizes the extraction of two resources with safety ensured and has been successfully applied in Huainan coalfield, China. The current situation of drainage and utilization of CMM in China are diagnosed. Connections between the coal production, methane emissions, drainage and utilization are analyzed. Estimations of future coal production, methane emissions, drainage and utilization are made in a co-exploitation based scenario. The emitted, drained and utilized CMM are projected to reach 26.6, 13.3 and 9.3 billion m3, respectively by adapting the assumption of 3800 million metric tons of coal production by 2020. 相似文献
20.
通过对影响循环流化床(CFB)锅炉脱硫效率的因素进行分析,根据近年有关单位的研究和国内CFB电厂的生产实践,提出循环流化床锅炉通过采取合理控制燃烧温度、循环物料量和床层物料量的优化设计、气相停留时间及固相停留时间的优化设计、采用合理的石灰石粒度、采用带有外置床的CFB锅炉等措施,可在较低的钙硫比情况下使脱硫效率达到94%以上。 相似文献