🔥The project to construct the thermal power station was finalized in 1978 after an MOU was signed between KPCL and the Karnataka State Electricity Board. TCE Consulting Engineers Ltd., a TATA GROUP company was appointed as the consultants for the project. The project involved two stages: Stage I, in which Units 1 and 2 were expected to be installed and Stage II, Units 3 and 4. each unit was expected to have an installed capacity of 210 MW. An area of 300 hectares was allocated for the units. Unit I of the plant was completed in March 1985, with Unit II following in March 1986.
🔥The construction of Unit III was started in 1986 and completed in March 1991 and the Unit IV was started in 1989 and completed in September 1994, thereby completing the Stage II. The total cost of Stage I of the project was ₹ 4,030,000,000 and of the Stage II was ₹9,830,000,000. The generators were supplied by bharat heavy electrical limited and the turbines by Kraftwerk Union AG (KWU) and mitsubishi. In 1996, a further expansion of the plant was carried out, with an investment of ₹15,450,000,000.
🔥Units 5 and 6 (each of 210 MW) were installed within three years.Unit 7 (210 MW) which was completed within a record time of 25 months, was installed at the end of the year 2002. The total installed capacity of the power plant is 1,470 MW (7 x 210 MW). As of 2007, Unit 8, with an installed capacity of 250 MW, is being constructed and is expected to be operational by September 2009.
💡Stage I (units 1 and 2) costing Rs. 403 crores in 1986.
💡Stage II (units 3 and 4) costing Rs. 983 crores in 1994.
💡Stage III (units 5 and 6) costing Rs. 1545 crores in 1999.
💡Stage IV (unit 7) costing Rs. 613 crores in 2002.
💡Stage IV (unit 8) costing Rs. 945 crores in 2010.
🔎RAW MATERIALS USED IN RAICHUR THERMAL POWER STATION
🔥RTPS uses coal for generation of ELECTRICITY . Its daily requirement of coal is about 20,000 metric tons, when running at full capacity, which is delivered from Western Coalfields Ltd. and Mahanadi Coalfields Ltd. The coal supplied is sampled using a computerized system and sent to the laboratory for testing. This ensures that the proper grade of coal is used.
🔥The plant has also started to use washed coal, due to its lower ash content.
🔥The plant's cooling water is pumped from the KRISHNA RIVER nearby.
🔎ELECTRICITY PRODUCTION IN RAICHUR THERMAL POWER STATION
🔥The coal is pulverized and fed into furnaces that convert water into steam. This steam runs the turbines to generate electricity. Units 1 to 7, each can produce 5.04 MU of energy per day and Unit 8 can produce 6 MU per day, hence the plant can produce 41.28 MU of energy per day when it is functioning at full capacity.
🔎PROBLEMS IN RAICHUR THERMAL POWER STATION
🔥RTPS generates about 1.5 million tonnes of fly Ash annually which causes environmental problems. 20% of the ash produced is wet bottom ash which is let into the ash bund.Though considered safer than fly-ash, bottom ash has also been found to contain heavy metals which can be dangerous to public health. The fly-ash which gets generated during the burning of coal disperses into the air and hence pollutes the atmosphere. This gets deposited on the surrounding land, thereby making the land infertile. The fly-ash may also cause breathing problems for humans. RTPS has taken steps to ensure that fly-ash gets precipitated out of the air by using electro-static elements in the furnaces, but about 2% of fly-ash gets into the atmosphere.The fly-ash is disposed of by converting it into a wet slurry and dumping it into vacant tracts of land (which become what are known as ash-ponds).This is not environment friendly and hence RTPS has come up with ways to make better use of fly-ash. It has entered into a collaboration with the Indo-Norwegian Environment Programme (INEP) and has set up a technology demonstration center called CASHUTEC (Center for Ash Utilization and Environment Conservation) near its plant.CASHUTEC demonstrates different uses for fly ash; mainly its use in the construction sector for making bricks, blocks and mosaic tiles.
🔎ACCORDING TO THE ARTCILE PUBLISHED IN THE TIMES OF INDIA (TOI) ON MARCH 9TH, 2020 THAT WAS ABOUT"thermal units in Raichur and bellari gets a fresh lease of life after allocation"
RAICHUR: There was a palpable fear in the hearts of employees working in the thermal power stations in Raichur and Ballari, many of which are very old dating back to several decades, following the announcement by the central government to effect the closure of coal-based units across the country in a phased manner. However, in his budget tabled on March 5, chief minister BS Yediyurappa earmarked funds for the establishment of the fuel gas desulfurisation (FGD) system in all three thermal units - a clear signal to the employees and management of the plants that there was no plan to shut them down in the foreseeable future.
🔥THE RAICHUR THERMAL POWER STATION(RTPS) in SHAKTINAGAR, Yermarus Thermal Power Station (YTPS) in Yermarus, both in Raichur districts,and the Bellary Thermal Power Station (BTPS) at Kudatini account for nearly 40% of the power generated to meet the electricity needs of the whole of Karnataka, particularly during the summer months.
🔥The allocation in the state budget for setting up of the FGD plant at the three thermal power units is likely to help them meet the emission limits for gases such as sulphur-di-oxide (SO2) prescribed by the Union ministry of environment, forests and climate change. The new guidelines issued by the Union ministry stipulate that the SO2 emission for those plants, the capacity of which is under 500MW and which started operations before 2016, SO2 emission has been capped at 600mg per cubic metre, while for those units that started operations from 2017, the limit is 100mg per cubic metre. In the same vein, the cap on SO2 emission for the former category, but with a capacity of more than 500MW is 200mg per cubic metre. A report by the CENTRAL ELECTRICAL AUTHORITY(CEA).
🔥(CEA) states that installation of FGD mechanism helps slashing SO2 emission considerably: For instance, units that currently have an emission rate of 600mg per Cubic metre can reduce this parameter to 500mg per cubic metre.
🔥Of the eight units at RTPS, the capacity of seven is 210MW, whereas that of the remaining one is 250MW. The capacity of both units at YTPS is 800MW, while two units at BTPS have a capacity of 500MW and the capacity of the other one is 700MW. The announcement made by Union finance minister Nirmala sitharaman in this year's budget about the Centre's plans to shut operations at coal-based power plants in a phased manner. RTPS, which has been supplying power to Karnataka since 1985, is likely to be the first in the chopping block. This is not to say that the two other thermal stations in Karnataka are off the hook; failure to cap emission levels to the prescribed limits could well sound the death knell to both of them.
🔥The cloud of uncertainty hanging over their future, the allocation for the FGD system has come as a fresh lease of life for all the plants.
🔥KarnatakaLPower Corporation td (KPCL) managing director V Ponnuraj said that they had invited tenders for installation of limestone-based FGD system at all the three plants. "This will not cost the exchequer anything. KPCL will bear the entire cost of the project. Domestic coal used for power generation results in lower SO2 emission levels, whereas the quantity of SO2 emitted when we use imported coal is higher," said Ponnuraj.
🔥RTPS executive director C Venugopal admitted that allocation for FGD in the state budget had come as a relief. "This will certainly help us comply with the revised limits of the Union environment ministry. As far as emission of nitrogen-di-oxide is concerned, all the plants are equipped with a system to reduce emission of the gas," he added.
🔥But concerns galore around the use of limestone for FGD, since it is likely to push the emission rates of carbon-di-oxide (CO2). Ponnuraj, however, sought to allay such fears stating that, in the course of the chemical reaction, limestone gets converted to gypsum, and is rendered inert.
Also DECCAN HERALD (DH) HAS PUBLISHED AN ARTICLE ON MARCH 25,2020 ABOUT "RTPS(Raichur Thermal Power Station) is u effected by the corona-virus / covid-19 scare"
🔥Some good news for the state amid the COVID-19 gloom. The Raichur Thermal Power Station (RTPS), which accounts for over 40% of total electricity generated in-state, has remained unaffected by the emergency triggered by the coronavirus outbreak.
🔥The power generation at the RTPS has continued unabated, thanks to a steady supply of coal by collieries from the coronavirus-hit Maharashtra and Telangana.
🔥Moreover, coal stockyard at the plant has additional stock which will be sufficient for another one-and-a-half month. The RTPS receives coal from Western coalfields in Maharashtra, Mahanadi coalfields in Odisha and Singareni coal mines in Telangana.
🔥RTPS, Executive Director, Venugopal told DH that power station requires around 25,000 metric tonnes of coal a day if the eight units with the total installed capacity of 1720 MW run at the optimum level. The stockyard has over seven lakh metric tonnes of coal at present against the capacity of 6.52 lakh metric tonnes, he explained.
🔥The plant is receiving six to seven rakes of coal a day. Power generation at the plant was 34 million units (MU) on March 19. We will run all units to optimum level during the morning peak hours, he added.
🔥However, RTPS has generated a total of 501.4 MU of power from March 1 to 19 while Yermarus Thermal Power Plant and Ballari Thermal Power Plant have generated 235.6 MU and 162.6 MU respectively. A total of 1840.73 MU of power, including hydro, wind and solar, has been added to the KPCL grid from March 1 to 19. Electricity consumption in the state is, more or less, 258 MU a day.
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