Ground Concentration of SO2 After Desulphurization at TPP Kostolac
Calculation of ground concentration and distribution of SO2 based on warranty tests after desulphurization of the chimney at Thermal Power Plant Kostolac. Learn about the impact of sulfur dioxide emissions from fossil fuel combustion plants, the implementation of desulphurization systems, and the results of warranty tests at TPP Kostolac.
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Slobodan Miladinovic Academy of criminalistic and police studies Belgrade CALCULATION OF GROUND CONCENTRATION AND DISTRIBUTION OF SO 2 BASED ON WARRANTY TESTS AFTER DESULPHURIZATION OF THE CHIMNEY OF THE THERMAL POWER PLANT KOSTOLAC B
Sulfur dioxide (SO2) is one of the most common air pollutants The most important anthropogenic sources of sulfur dioxide are fossil fuel combustion plants, especially coal. Most often, about 95% of sulfur in the fuel is emitted as SO2, 1-5% as SO3 and 1-3% as sulfate particles Thermal power plants are considered to be the largest emitters of SO2 Average annual SO2 concentrations in urban areas of the world range from 6 - 80 g / m3, depending on development and environmental awareness 1
According to HEAL, air pollution from thermal power plants in the Western Balkans each year leads to 3,900 premature deaths, 8,500 cases of bronchitis in children, as well as other chronic diseases. The cost of treatment is 11.53 billion euros TPP Kostolac B, emits more SO2 than the total allowable emission value of all Western Balkan countries According to the measurements of excessive SO2 emissions, TPP Kostolac conditioned the presence of SO2 in the atmosphere 10.5 to almost 15 times higher than allowed 2
Due to high SO2 emissions, TPP Kostolac B is the first in EPS to be built a desulphurization system The system for desulphurization of SO2 concentration in the air should be reduced more than 10 times, at full load of blocks and during combustion of coal of the worst quality Chinese company CMEC has implemented a project to build a plant for desulphurization of flue gases of blocks B1 and B2 of the Thermal Power Plant "Kostolac" Guaranteed mass concentration of sulfur dioxide at the exit of the desulphurization plant is 200 mg / m3 (dry gas, 6% O2) 3
Warranty tests in TPP "Kostolac B" at the waste gas desulphurization plant (ODG) on block B1, which was done by the Mining Institute Belgrade TTP Kostolac B C0, mg/Nm3 C1, mg/Nm3 S, % Block B1 5439,6 55,3 99 5419,9 143 97,4 Block B2 98,2 Middle value The calculation determined that the degree of desulphurization on block B1 is in the range of 98.4-98.8%, and on block B2 in the range of 97.3 - 97.5%, which is within the prescribed limits. 4
SO2 emission in the trial operation of the desulphurization system was calculated by mathematical modeling using the Model of the US Environmental SSREENVIEW 4. We compared the effects that one source has on air quality (average one-hour concentration) conditions, operation of Kostolac B thermal power plant without desulphurization plant and operation of desulphurization plant and new wet chimney as emitter Protection Agency in different operating The paper analyzes the data on the emission of sulfur dioxide from the chimney of TPP Kostolac B in 2008 and the emission of sulfur dioxide from the same thermal power plant using a desulphurization plant during the trial operation in April 2017. 5
Sulfur oxide concentrations were used to calculate the following input sizes: 1. Chimney height 2. Chimney inside diameter 3. Mass flow and flue gas velocity at the chimney outlet 4. Flue gas temperature at the outlet 5. Terrain characteristics around thermal power plants (rural and urban areas, absolute height, topographic features) 6. State of the atmosphere in terms of stability and wind speed 6
Production parameters in TPP Kostolac B in December 2008 PARAMETER KOSTOLAC B 250 Chimney height [m] 9,8 Chimney inside diameter [m] 170 Flue gas temperature at the outlet [0C] 25,7 Flue gas velocity at the outlet vs [ms-1] 1410,8 Mass flow (g/s) 7
SO2 concentration depending on the distance from the source at the Kostolac B thermal power plant in December 2008. Automated Distance Vs. Concentration Terrain Height = 0,00 m. 450 400 350 300 (ug/m**3) 250 200 150 100 50 0 5000 10000 15000 20000 25000 Distance (m) 30000 35000 40000 45000 50000 55000 The maximum concentration of 410.2 g / m3 is at a distance of 1381 m. The concentration of SO2 is above the permissible limit and amounts to 150 g / m3 at a distance of 600 m to 7500 m 8
Production parameters of TPP Kostolac B in trial operation of desulphurization system (April 2017) PARAMETER KOSTOLAC B (B1 and B2 blocks) 180 13,4 Chimney height [m] Chimney inlet diameter [m] 63,8 Flue gas temperature at the outlet [0C] 21 Flue gas velocity at the outlet vs [m/s] 80,8 Mass flow (g/s) 9
SO2 concentration depending on the distance from the source at the Kostolac B thermal power plant in April 2017 (after desulphurization of the chimney) The concentration of SO2 is more than 90% lower compared to the 2008 emission. The maximum concentration is 13.06 g / m3 at a distance of 1642 m. The results obtained by modeling show that the flue gas desulphurization system fully meets the requirements for lowering groundwater SO2 concentrations in the area around the source of pollution. 10
Distribution of SO2 concentrations for stability class D at a temperature of 11.70 C and a wind speed of 2.2 m / s (left) and stability class F for a temperature of 11.7 0 C and a wind speed of 2.2 m / s (right) The maximum concentration of SO2 for stability class D is 0.1006 g / m3 at a distance of 50000 m, and for stability class F 0.021 g / m3 also at a distance of 50000 m. In both cases, it is noticed that the concentrations of SO2 are extremely low 11
Distribution of SO2 concentration for stability class F at wind speed 3.8 m / s (left) and 1.3 m / s (right) The maximum concentration of SO2 when the wind speed is 3.8 m / s is 0.3313 g / m3, and at a wind speed of 1.3 m / s it is 0.2021 g / m3. There is also a difference in the distance of the increase in pollution from the source. With stronger winds, the increase in pollution starts at a distance of 10 kilometers, and with weaker winds at 7.5 kilometers. 12
Conclusion 1. The results obtained by modeling the spread of sulfur dioxide from TPP "Kostolac B" show that the desulphurization system with a new wet chimney fully meets the requirements prescribed by law and that the ground concentrations around the emitter are minimal 2. According to our calculation, the degree of desulphurization in TPP Kostolac B is 94.3% 3. The mean one-hour concentrations obtained by modeling are significantly below 200 mg / Nm3 or less, as provided by the European Industrial Emissions Directive, which came into force in 2016. 4. The use of a desulphurisation system will significantly improve the quality of the environment, which is seriously endangered. 13
Thank you for your attention 14
