STUDY OF THE EFFECT OF SULFUR CONTENT IN FUEL ON EFFICIENCY AND ENVIRONMENTAL SAFETY OF BOILER OPERATION IN COMBUSTION OF NON-PROJECTED FUEL

The paper gives brief information about the corrosion-aggressive sulfur compounds in the pulverized coal boiler path. Sulfur dioxide (SO₂) and sulfuric anhydride (SO₃) are formed when coal burns with increased sulfur content. As the combustion products move along the convective shaft of the boiler, their temperature decreases and reaches the values of the beginning of condensation of sulfurous anhydride and sulfuric anhydride. The paper describes an economical and simple experiment that allows us to determine the measures how reduce low-temperature corrosion of low-temperature heating surfaces (LTHS). In the study of methods for increasing energy performance and improving the environmental efficiency of equipment and on the basis of analysis the results of industrial tests of various ways to reduce sulfur oxide emissions from the burning of non-projected brown coal species, some methods have been evaluated and scientifically grounded technical proposals have been prepared to achieve the minimum possible concentrations of sulfur oxides in emissions with flue gases into the atmospheric air. At the same time, a number of important legal acts containing a set of measures to switch to the principles of the best available technologies and the development of an information and technical handbook on the best available technologies (“Combustion of fuels in large installations for energy production”) have been taken into account for power facilities. In addition, some measures aimed at improving the reliability and efficiency of the operation of the STPP of boilers of thermal power plants have been identified in terms of environmental and economic feasibility.

1. Coal production / main indicators (Dobycha uglya / osnovnye pokazateli). Official website of the Ministry of Energy of the Russian Federation. 2016. Available on: https://minenergo.gov.ru/node/435 (23.July.2017) (in Russ.).

2. The Ministry of Energy forecasts the growth of coal production in Russia to 387 million tons in 2017 (Minenergo prognoziruet rost dobychi uglya v Rossii do 387 mln tonn v 2017 godu). Vedomosti newspaper, 2017. Available on: https://www.vedomosti.ru/business/news/2017/03/17/68168 5-minenergo-uglya (date of circulation: 23 July, 2017) (in Russ.).

3. Long-term program for the development of the Russian coal industry for the period up to 2030. Approved by the decree of the Government of the Russian Federation No. 1099-r of June 21, 2014 (Dolgosrochnaya programma razvitiya ugol'noi promyshlennosti Rossii na period do 2030 g. Utverzhdena rasporyazheniem Pravitel'stva Rossiiskoi Federatsii №1099-r ot 21 iyunya 2014 g) (in Russ.).

4. Energy strategy of Russia for the period until 2030. Approved by the decree of the Government of the Russian Federation of November 13, 2009 No. 1715-r, 2009 (Energeticheskaya strategiya Rossii na period do 2030. Utverzhdena rasporyazheniem Pravitel'stva). Available on: http://government.ru (29 July, 2017) (in Russ.).

5. Federal Law of July 21, 2014 No. 219-FZ “On Amendments to the Federal Law "On Environmental Protection" and certain legislative acts of the Russian Federation” (Federal'nyi zakon ot 21 iyulya 2014. № 219-FZ «O vnesenii izmenenii v Federal'nyi zakon “Ob okhrane okruzhayushchei sredy” i otdel'nye zakonodatel'nye akty Rossiiskoi Federatsii»). Available on: http://government.ru (20 July, 2017) (in Russ.).

6. Order of the Government of the Russian Federation of December 24, 2014; No. 2674-r "On approval of the list of areas of application of the best available technologies" (Rasporyazhenie Pravitel'stva Rossiiskoi Federatsii ot 24 dekabrya 2014; № 2674-r «Ob utverzhdenii perechnya oblastei primeneniya nailuchshikh dostupnykh tekhnologii») http://government.ru (20 July, 2017) (in Russ.).

7. Decree of the Government of the Russian Federation of December 23, 2014 No. 1458 “On the procedure for determining technology as the best available technology, as well as developing, updating and publishing information and technical guides on the best available technologies” (Postanovlenie Pravitel'stva RF ot 23.12.2014 № 1458 «O poryadke opredeleniya tekhnologii v kachestve nailuchshei dostupnoi tekhnologii, a takzhe razrabotki, aktualizatsii i opublikovaniya informatsionno-tekhnicheskikh spravochnikov po nailuchshim dostupnym tekhnologiyam»). Available on: http://government.ru (20 July, 2017) (in Russ.).

8. Decree of the Government of the Russian Federation No. 1029 of September 28, 2015 “On approval of criteria for assigning objects that have a negative impact on the environment, to objects of I, II, III and IV categories” (Postanovlenie Pravitel'stva RF ot 28.09.2015 № 1029 «Ob utverzhdenii kriteriev otneseniya ob"ektov, okazyvayushchikh negativnoe vozdeistvie na okruzhayushchuyu sredu, k ob"ektam I, II, III i IV kategorii»). Available on: http://government.ru (20 July, 2017) (in Russ.).

9. Order of the Government of the Russian Federation of March 19, 2014 No. 398-r "On the approval of a set of measures aimed at refusing to use outdated and inefficient technologies, moving to the principles of the best available technologies and the introduction of modern technologies" (Rasporyazhenie Pravitel'stva Rossiiskoi Federatsii ot 19 marta 2014 g. № 398-r “Ob utverzhdenii kompleksa mer, napravlennykh na otkaz ot ispol'zovaniya ustarevshikh i neeffektivnykh tekhnologii, perekhod na printsipy nailuchshikh dostupnykh tekhnologii i vnedrenie sovremennykh tekhnologii”). Available on: http://government.ru (20 July, 2017) (in Russ.)

10. Decree of the Government of the Russian Federation of July 3, 2014 No. 1217-r “On the approval of the action plan (road map) Introduction of innovative technologies and modern materials in the fuel and energy sector for the period until 2018” (Rasporyazhenie Pravitel'stva Rossiiskoi Federatsii ot 03 iyulya 2014. № 1217-r «Ob utverzhdenii plana meropriyatii («dorozhnaya karta») «Vnedrenie innovatsionnykh tekhnologii i sovremennykh materialov v otraslyakh toplivno-energeticheskogo kompleksa» na period do 2018 goda»). Available on: http://government.ru (20 July, 2017) (in Russ.).

11. Report on research work: "Development of optimal options for modernization or construction of equipment of CHP-10 of PJSC" IRKUTSKENERGO "in order to achieve the minimum possible concentrations of harmful emis- sions with flue gases in the atmospheric air" (Otchet o nauchno-issledovatel'skoi rabote: «Razrabotka optimal'nykh variantov modernizatsii ili stroitel'stva oborudovaniya TETs-10 PAO «IRKUTSKENERGO» dlya dostizheniya minimal'no vozmozhnykh kontsentratsii vrednykh vybrosov s dymovymi gazami v atmosfernyi vozdukh») / JSC “ENIN”. Moscow. 2016 (in Russ.).

12. Lipov Yu.M., Tretyakov Yu.M. Boiler installations and steam generators. (Kotel'nye ustanovki i parogeneratory) “Regular and Chaotic Dynamics” Publishing House, 2003 (in Russ.).

13. Janko P.I. Slagging of heating surfaces during incineration of non-projected fuels (Shlakovanie poverkhnostei nagreva pri szhiganii neproektnykh topliv). Electric stations, 1993;3:29–31 (in Russ.).

14. Abramov V.V., Putilova V.Ya. Modern environmental technologies in the electric power industry: Infor- mation book (Sovremennye prirodookhrannye tekhnologii v elektroenergetike: Informatsionnyi sbornik) / Moscow: Publishing house, MPEI, 2007 (in Russ.).

15. Kuznetsova N.V., Thermal calculation of boiler units (Normative method) (Teplovoi raschet kotel'nykh agregatov (Normativnyi metod)). Moscow: “Ecolit” Publ., 2011, 296 p. (in Russ.).

16. GD 34.26.105 (MI 34-70-118-84) Methodological instructions for preventing low-temperature corrosion of boilers heating surfaces and gas ducts (RD 34.26.105 (MU 34-70-118-84) Metodicheskie ukazaniya po preduprezhdeniyu nizkotemperaturnoi korrozii poverkhnostei nagreva i gazokhodov kotlov), 2005. Available on: http://snipov.net/database/c_4294966485_doc_4294817628.html (12 June, 2017) (in Russ.).

17. Pilov P.I., Mostyka Yu.S., Shutov V.Yu.. Evaluation of magnetic desulphurization of hard coal (Otsenka magnitnoi desul'furatsii kamennykh uglei) / Modern science: research, ideas, results, technology. Dnepropetrovsk: NPVK “Triacon” Publ., 2013;(TTPT), pp. 125– 136 (in Russ.).

18. Report on research work: “Development of technology for the enrichment and upgrading of low-grade solid fuels with the help of superconducting separators in fuel-processing systems of thermal power plants. Experimental evaluation of the possibility of desulphurisation and demineralization of suburban and Donetsk (AH) coals by mag- netic methods “ (Otchet o nauchno-issledovatel'skoi rabote: «Razrabotka tekhnologii obogashcheniya i oblagorazhivaniya nizkosortnykh tverdykh topliv s pomoshch'yu sverkhprovodyashchikh separatorov v sistemakh toplivopodgotovki TES. Eksperimental'naya otsenka vozmozhnosti desul'furatsii i demineralizatsii podmoskovnykh i donetskikh (ASh) uglei magnitnymi metodami») / JSC "ENIN". State Registration No. 01870005003, Inv. № 8.90 009176 Moscow. 1988 (in Russ.).

19. Galitsky J.Ya., Gribkov A.M., Tyuklin D.S. To the choice of the method of intake of cold air on the boilers of TPP (K vyboru sposoba zabora kholodnogo vozdukha na kotlakh TES). IX International Symposium "Energy Resource Efficiency and Energy Saving". Collection of Proceedings, 2008, Kazan, p. 131–135 (in Russ.).

20. Batukhtin A.G., Safronov P.G., Kirillov M.V. Optimization of preheating of cold air in front of air heaters of boilers (for example Kharanorskaya GRES) (Optimizatsiya predvaritel'nogo podogreva kholodnogo vozdukha pered vozdukhopodogre- vatelyami kotlov (na primere Kharanorskoi GRES))/ Scientific and technical statements SPbPU. Natural and Engineering Sciences, 2012;1(142):97–102 (in Russ.).