Environmental impact of thermal power plant

Environmental impact of thermal power plant, Different pollutants from thermal power plants, their effects on human health and vegetation, methods to control pollutants such as particulate matter; oxides of sulphur; oxides of nitrogen, dust handling systems, ESP, scrubbers, water pollution, thermal pollution, noise pollution from TPP and its control

1. Environmental impact of thermal power plant PCCOE&R, Prof. Siraskar G.D.

2. Fossil fuels Diesel power plant Gas turbine Nuclear power plant SO ₂ CO SO ₂ Radioactive release NO x , HC NO x , Radioactive waste CO 2 SO ₂ CO 2 Thermal pollution Particulate matter NO x , HC Thermal pollution CO 2 Thermal pollution Particulate matter Smoke

3. Pollution to blame for nearly 9 million deaths globally A typical passenger  vehicle emits  about 4.6 metric tons of  carbon dioxide per year

4. 1100000 Mt Co2 globally 2010 , earth atmosphere temperature increase by 1 º C and in will increase by 2 º C

5. Can we reduce / eliminate Co2 production ? calculate CO2 produced by individual person

6. CO2 emission captured and stored

7. Thermal pollution

8. Smog: fog mix with smoke

9. 5 December 1952 London

10. Air pollution linked to 12.4L deaths in India in ’17: Report TOI  

11. SO2 pollution reduction In this chapter a number of possible techniques for reducing emissions of sulfur oxides from power plants are discussed and evaluated. They include: improved efficiency of conversion of fuel to electricity (this would reduce pollutant emissions per unit of electricity generated); shift to nuclear generation as rapidly as possible since no sulfur oxide (or particulate) is emitted from nuclear plants; shift fossil fuel plants to lower sulfur fuels; removal of sulfur from coal before combustion, or of the sulfur oxide after combustion, but before it enters the stack: the techniques to be considered are

12. coal preparation (conventional and advanced technology); solvent refined coal; low sulfur, low BTU gas from coal; fluidized bed combustion; The  SO2  emissions are controlled using a spray dryer absorber (SDA) flue gas desulfurization system. During the SDA process, hot flue gas with entrained coal flyash passes through large reaction chambers where a mixture of recycled flyash /SDA product slurry, and lime-water slurry (calcium hydroxide) is sprayed and atomized

13. Wet scrubber: for particulate matter: lime: gypsum: dewatering

14. Cyclone dust collector

15. Fossil fuels Diesel power plant Gas turbine Nuclear power plant SO ₂ CO SO ₂ Radioactive release NO x , HC NO x , Radioactive waste CO 2 SO ₂ CO 2 Thermal pollution Particulate matter NO x , HC Thermal pollution CO 2 Particulate matter Smoke

16. Effect of Co2 CO2 Global warming 118 million metric tons of co2/ year Human health: Headache Nausea And breathing problem

17. Source of NOX The major sources of man-made NOx emissions are hightemperature  combustion processes, such as those occurring in automobiles and power plants. Home heaters and gas stoves also produce substantial amounts of NO2 in indoor settings. Primarily NO and NO 2  NO 3 , N 2 O, N 2 O 3 , N 2 O 4 ,N  2 O 5  are also known to occur Thermal NOx : created by oxidation of atmospheric N 2 when T > 1000 K Fuel NOx : from oxidation of N in fuel

18. Hydrocarbon (HC) Unhurt fuel like in ic engine, gas turbine, HC causes irritation in respiratory system

19. humanity’s biggest killer that causes up to 7 million people to die earlier than they should globally .

20. Dry type cooling tower: direct type

21. Dry type cooling tower: indirect direct type

22. Thanks