Focus on Coal
another desulphurisation plant at Poznan, also in Poland. T e FGD plant at Lodz will use a six-module version of the four- module unit installed at Poznan. When complete, the Lodz FGD plant will keep sulphur dioxide and dust concentrations in the fl ue gas below the 200 mg/Nm3
and 20 mg/Nm3 limits
respectively demanded by the European Directive regulating industrial emissions. It will also bring the total fl ue gas fl ow being treated by NID in Poland to over 5 million m3
/h – making it the leading
technology in the Polish semi-dry desulphurisation market, according to Alstom. Meanwhile Siemens is to supply two steam turbine generator units specially designed for the Balkhash coal-fi red power plant in Kazakhstan. T ey will be used primarily for power generation in the plant, although the plant itself is also designed for co-generation of heat and power and district heating. Commissioning is scheduled for summer 2019. T e Balkhash coal-fi red plant is located on the shore of Lake Balkhash, one of the largest lakes in central Asia, in eastern Kazakhstan. Siemens’ scope of supply for the order includes two SST5-6000 steam turbines, each with an electrical generating capacity of 660 megawatts (MW), and two generators of type SGen5-3000W, including control systems and all auxiliary and ancillary systems. Steam turbines of this SST-6000 series are typically operated in conventional
C
oal use for electricity generation is set to grow 17% in the next 20 years, according to forecasts by the
International Energy Agency.
Finally, Karachi-based K-Electric has hailed the decision by Pakistan’s National Electric Power Regulatory Authority (NEPRA) to approve a generation licence for the company to undertake a clean coal conversion project at the 420MW Bin Qasim power station. T e company had previously signed a contract with Harbin Electric of China in 2013 to construct new coal-fi red boilers at the plant. Older boilers are also being rehabilitated as part of the US$400 million (€369 million) project. In a separate development the company has also announced a US$1 billion (€0.9 billion) investment in new coal- based generation capacity in Pakistan. To this end it has signed an accord with power plant construction specialist China Machinery and Engineering Corporation (CMEC) for the construction of a 700 MW power plant. ●
India’s coal-fired plants underperforming, says study I
ndia’s coal-fi red power plants are underperforming in a number of important areas according to a
new study. ‘Heat on Power’, from the New
Delhi-based Centre for Science and Environment (CSE), rated 47 coal-fi red power plants around the country in terms of effi ciency and compliance with environmental regulations, concluding that together they are among the world’s ‘most ineffi cient’, with “immense scope for improvement”. “The objective of the study
was to give a clear picture of the environmental performance of
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the power generation sector. Our fi nding is that in India, where the demand for power is increasing, power plants are performing way below the global benchmarks,” commented CSE director general Sunita Narain. Overall the power generation
sector scored 23%; a plant that follows all best practices potentially could achieve 80%. In addition, 40% of the plants rated in the study scored below 20%. Average effi ciency of coal-
generating plants was found to be 32.8% and average carbon dioxide emissions 1.08kg/kWh. The latter
fi gure, notes the report, is 14% higher than China’s emission level. The plants were also found to
be collectively using an estimated 22 billion m3
/y of water, roughly
half that needed by the country’s domestic population. The performance of the NTPC,
the largest coal-power producing company in India, was found to be below par. NTPC did not disclose its data, and hence was rated based on a primary survey and publicly available information. The six plants of NTPC that were rated received scores of 16-28%, the poorest being Delhi’s Badarpur plant. ●
steam power plants with a power output up to 1200MW. T e SST-6000 features a barrel-type high-pressure cylinder, an intermediate-pressure cylinder and up to three double fl ow low-pressure cylinders for 50 and 60Hz output.
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