ENERGY SAVING METHOD DURING THE WORK OF BOILER COMBINED HEAT AND POWER PLANTS ON PEAT OF THE INCREASED HUMIDITY
The combustion of peat (milled or lumpy), as well as any other fuel that contains moisture, only the net calorific value as part of the heat is spent on evaporation of the moisture. The water vapor together with the flue gases are removed to the atmosphere, and the latent heat of vaporization is not considered. Accordingly, the losses increase with the exhaust gases, which due to the high moisture content of peat may reach comparatively high values.
The method of energy conservation on the example of the boiler plant on Peat Plant ‘Tootsi’. The basis of this method is the deep disposal of flue gas heat by forced convection through the use of design features such as heat exchanger surface and the way it works.
This flow heat recovery change the way the recycled heat from the coolant to the environment, take this heat. The modified method can dispose of latent heat of vaporization of moisture contained in the fuel, in the deep cooling of flue gases, and fully use it to heat the cooling water, which can be sent to the steam turbine cycle power plant without further processing. Heat recovery also allows the released water vapor condensation, in which the cooling process is cleaned by sulfuric acid contained in the peat.
Produced calculation efficiency performance pure condensate and flue gas heat recovery to evaluate this method in terms of energy efficiency at a specific example.
Energy saving, energy efficiency, heatutilizer, peat, boiler room, power plant, warmth utilization, high humidity.
Issue number: 9
Authors: Nazarov M. S.
About authors: Nazarov M.S., Master’s Degree Student,
Tver State Technical University, 170026, Tver, Russia,
REFERENCES: 1. Mikheev M. A., Mikheeva I. M. Osnovy teploperedachi. Izd. 2-e (Heat transfer principles, 2nd edition), Moscow, Energiya, 1977, pp. 8–19.
2. Gorfin O. S., Mikhaylov A. V. Mashiny i oborudovanie po pererabotke torfa: Ch.1. Proizvodstvo torfyanykh briketov (Peat processing machines and equipment: Peat briquetting), Tver, TvGTU, 2013, pp. 59–62.
3. Kudinov A. A. Energosberezhenie v teploenergetike i teplotekhnologiyakh (Energy saving in heat-power engineering and heat technologies), Moscow, Mashinostroenie, 2011, 373 p.
4. Aronov I. Z. Kontaktnyy nagrev vody produktami sgoraniya prirodnogo gaz (Contact heating of water by natural gas combustion products), Leningrad, Nedra, 1990, 280 p.
5. Gorfin O. S., Zyuzin B. F. Patent RU 2555919 (51) MPK F22B 1/18 (20006.01) / no 2014113843/06.
6. Sarkki J. Griffin F. Scully S. Flynn T. CFB Technology in ESB Peat Burning Power Stations. Presented at 21st International Conference on Fluidized Bed Combustion. Naples, Italy 2012. 20 p.
7. Paappanen T. Peat Industry In the Six EU Member States Country Reports. Finland, Ireland, Sweden, Estonia, Latvia, Lithuania. Dublin, Ireland 2010. 140 p.
8. Sazanov B. V. Teplovye elektricheskie stantsii. Uchebnoe posobie dlya tekhnikumov (Thermal stations. Educational book for secondary technical schools), Moscow, Energiya, 1974, pp. 9–21.
9. Aleksandrov A. A., Grigor’ev B. A. Tablitsy teplofizicheskikh svoystv vody i vodyanogo para (Tables of heat-transfer properties of water and steam), Moscow, Izd-vo MEI, 1999, 168 p.