共查询到20条相似文献,搜索用时 26 毫秒
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《Energy Policy》2006,34(17):2690-2701
About 80% of the electric energy production in Turkey is provided by thermal power plants which use fossil fuels. Lignite, the most abundant domestic energy source, is consumed in most of these plants. Turkey has approximately 0.85% of the world's lignite reserves; however, the Turkish lignites have low calorific value and contain relatively higher amounts of ash, moisture, and sulfur. Nearly 80% of the lignite mined in Turkey is consumed in the thermal power plants since it is not appropriate for use in other types of industry and heating. In Turkey, 13 large-scale lignite-fired thermal power plants are responsible for a considerable amount of air pollution. Therefore, it is crucial to decide on the optimal place and technology for the future thermal power plants, and to equip the currently operating plants with newer technologies that will reduce amount of contaminants released into the air.In this study, the effects of the lignite-fired thermal power plants which have an important place in the energy politics in Turkey on the air pollution are investigated. We focused on SO2 pollution and the regions in which the SO2 emissions were concentrated and diffused. The pollutant diffusion areas were projected and mapped based on parameters such as wind data, isotherm curves, population density, and topographic features by using Geographical Information System (GIS) software, ArcView. The contribution of the thermal power plants to SO2 pollution was also examined. 相似文献
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当前,火力发电厂电站建设装机容量不断增大,烟气排放量也随之增大,但现行环保政策要求越来越高,要求为电厂必须实行全烟气脱硫,所以湿法烟气脱硫环保技术(FGD)被广泛应用于各大、中型火力发电厂。随着脱硫系统不断增大,该系统耗电量也不断增加,660MW机组脱硫系统耗电率约为0.7%。景德镇发电厂通过对脱硫系统循环泵、氧化风机优化及开展小指标竞赛等一系列调整后,脱硫系统厂用电率下降约0.1%。 相似文献
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Debabrata Chattopadhyay 《国际能源研究杂志》1995,19(8):721-727
There is a trade-off between cost and emission minimizing objectives for electricity generation because of the measures needed to reduce emissions. For SO2 emissions reduction these are adjustment within the system which involve deviation from the least-cost generation schedule, changing power mix for future capacity and installation of abatement equipments, e.g. flue gas desulfurization unit. The linear programming modelling framework (INGRID) presented here brings out the nature of this trade-off for SO2 emissions reduction from the Indian power system for existing capacity and future capacity addition. The adjustment within the existing system can take place through integrated optimal operations of various electricity utilities by substituting generation of more polluting plants by less emitting efficient plants as long as the cost of reduction is lower than that of flue gas desulfurization. 相似文献
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为了减少温室气体排放,同时保证电厂运行的经济性,本文采用VB6. 0编程实现对一台600 MW锅炉热力计算,对比分析了4种不同煤种对锅炉效率、燃煤成本的影响;基于物料平衡法重点分析煤质成分对碳排放及脱硫成本影响。结果表明:同一负荷下,低位发热量越低、收到基碳含量越高的煤种燃煤量、碳排放量越大;煤质特性和碳价共同决定燃煤成本、排碳及脱硫成本,燃用贫煤时整体经济性最差;碳价变化时,不同的煤种对应的燃煤和排碳总成本也不同。根据当前燃煤价格及碳价提前预测电厂运行经济性,对燃煤电厂合理选择煤种提供有益的参考。 相似文献
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针对华能国际电力股份有限公司上安电厂6号600MW超临界机组电除尘器除尘效率低、排放超标进行设备改造,采用综合的“低低温+高频电源控制技术+末电场复合双区技术扩容”除尘器提效改造新技术,连同脱硫系统的除尘作用,达到了烟囱排放小于20 mg/Nm3的目标,可在大型机组除尘器提效改造工程中推广. 相似文献
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Increased population and industrial development demands sustainable electricity, the majority of which is produced by thermal power stations, which utilize coal as a fuel all over the world. Coal burning results in generation of large quantities of coal residues, which contains very fine particles that tend to become air-borne and which contribute to the formation of suspended particulate matter (SPM). Hence, in order to safeguard the environment against the emission of SPM, pollution control devices, such as cyclone separators, bag filters and electrostatic precipitators (ESPs) have been employed. In addition, flue gas conditioning (FGC) is practiced to increase the efficiency of ESPs, with the addition of chemical additives, or sprinkling water to the flue gas. This process increases the collection efficiency of the electrostatic precipitators, and thereby results in reduction of the SPM level. However, the effects of the process, which play an important role in efficient FGC, need to be investigated thoroughly before utilizing this method. With this in view, a critical review of various flue gas conditioning techniques employed for controlling the SPM level in thermal power stations is presented in this paper. The present study also reports analyses of data obtained from different thermal power stations in India as well as the rest of the world. 相似文献
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燃煤电厂烟气脱硫技术的模糊综合评价 总被引:17,自引:1,他引:17
介绍了3种模糊综合评价方法,分析了各自的优缺点。以典型的6种燃煤电厂烟气脱硫技术为实例进行了模糊综合评价,将不同方法的优点结合起来综合考虑,根据最大隶属原则得到准确的评价结果。表6参8 相似文献
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低低温电除尘器得到了广泛应用,但国内外鲜有高硫煤机组应用低低温电除尘器的案例。搭建了高硫煤机组低低温电除尘器试验台,测试了五种不同烟气温度下飞灰样本的比电阻、成分和粒径,提出了飞灰平均粒径与烟气温度的拟合公式;完成了国内首台高硫煤机组低低温电除尘器工程应用,并对低低温电除尘器进行了性能测试和运行优化。试验结果表明:烟气温度越低,飞灰比电阻越低,飞灰粒径越大;飞灰成分随着烟气温度变化较小;除尘效率随着烟气温度的降低明显提高;采用运行模式三和模式四相对日常运行模式可分别降低电除尘器电耗28%和35%。 相似文献
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Ayhan Demirbas 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2013,35(6):527-536
In this work, renewable energy facilities of Turkey were investigated. Electricity is mainly produced by thermal power plants, consuming coal, lignite, natural gas, fuel oil and geothermal energy, and hydro power plants in Turkey. Turkey has no large oil and gas reserves. The main indigenous energy resources are lignite, hydro and biomass. Turkey has to adopt new, long-term energy strategies to reduce the share of fossil fuels in primary energy consumption. For these reasons, the development and use of renewable energy sources and technologies are increasingly becoming vital for sustainable economic development of Turkey. The most significant developments in renewable production are observed hydropower and geothermal energy production. Renewable electricity facilities mainly include electricity from biomass, hydropower, geothermal, and wind and solar energy sources. Biomass cogeneration is a promising method for production bioelectricity. 相似文献
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高水分褐煤燃烧发电的集成干燥技术 总被引:7,自引:0,他引:7
高水分褐煤直接燃烧发电效率低,褐煤的集成干燥发电技术是提高其竞争力的有力手段.介绍了国外几种先进的集成干燥技术,如:管式干燥技术,流化床蒸汽干燥、蒸汽空气联合干燥,床混式干燥(BMD)、热机械脱水(MTE)等,并分析了各自的特点.最后,探讨了我国可以借鉴的褐煤燃烧发电预干燥技术. 相似文献
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Emission factors of CO2, SO2 and NOx emitted from Iran’s thermal power plants are fully covered in this paper. To start with, emission factors of flue gases were calculated for fifty thermal power plants with the total installed capacity of 34,863 MW over the period 2007–2008 with regard to the power plants’ operation characteristics including generation capacity, fuel type and amount and the corresponding alterations, stack specifications, analysis of flue gases and physical details of combustion gases in terms of g kWh−1. This factor was calculated as 620, 2.57 and 2.31 g kWh−1 for CO2, SO2 and NOx respectively. Regarding these results, total emissions of CO2, SO2 and NOx were found to be 125.34, 0.552 and 0.465 Tg in turn. To achieve an accurate comparison, these values were compared with their alternatives in North American countries. According to this comparison, emission factor of flue gases emitted from Iran’s thermal power plants will experience an intensive decline if renewable, hydroelectric and nuclear types of energy are more used, power plants’ efficiency is increased and continuous emission monitoring systems and power plant pollution reduction systems are utilized. 相似文献
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干式烟气脱硫技术进展及其应用前景分析 总被引:2,自引:0,他引:2
对国内外有广泛应用前景的几种干式烟气脱硫技术进行了介绍,分析了这些脱硫技术的特点,并针对上海地区电厂燃用高钙低硫煤的实际情况,提出了采用高钙粉煤灰增湿活化脱硫的简易脱硫方法。 相似文献
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对目前火力发电厂主流除尘技术进行了归纳,分析了电除尘器、袋式除尘器和电袋复合式除尘器的技术特点,比较了经济性和运行的安全可靠性,对火电厂的除尘器选型提出了建议。 相似文献
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Oxy-fuel combustion of solid fuels 总被引:1,自引:0,他引:1
Maja B. Toftegaard Jacob Brix Peter A. Jensen Peter Glarborg Anker D. Jensen 《Progress in Energy and Combustion Science》2010
Oxy-fuel combustion is suggested as one of the possible, promising technologies for capturing CO2 from power plants. The concept of oxy-fuel combustion is removal of nitrogen from the oxidizer to carry out the combustion process in oxygen and, in most concepts, recycled flue gas to lower the flame temperature. The flue gas produced thus consists primarily of carbon dioxide and water. Much research on the different aspects of an oxy-fuel power plant has been performed during the last decade. Focus has mainly been on retrofits of existing pulverized-coal-fired power plant units. Green-field plants which provide additional options for improvement of process economics are however likewise investigated. Of particular interest is the change of the combustion process induced by the exchange of carbon dioxide and water vapor for nitrogen as diluent. This paper reviews the published knowledge on the oxy-fuel process and focuses particularly on the combustion fundamentals, i.e. flame temperatures and heat transfer, ignition and burnout, emissions, and fly ash characteristics. Knowledge is currently available regarding both an entire oxy-fuel power plant and the combustion fundamentals. However, several questions remain unanswered and more research and pilot plant testing of heat transfer profiles, emission levels, the optimum oxygen excess and inlet oxygen concentration levels, high and low-temperature fire-side corrosion, ash quality, plant operability, and models to predict NOx and SO3 formation is required. 相似文献