Using the heat of deaerator flash steam for additional heating of return system water in boiler installations

Reliable and economical operation of the equipment of thermal heat supply systems and boiler installations is an important and challenging task. High-quality water treatment directly affects the efficiency of boiler installations. The main stages of water treatment at thermal power plants are pretreatment, desalination and thermal deaeration — removal of aggressive gases that lead to corrosion of equipment. Currently, there are a significant number of manufacturing enterprises that are equipped with their own boiler plants. In boiler houses used for steam generation, as well as heating boilers serving heating system, water deaeration is a mandatory process. The article is dedicated to the development of a technology to make the boiler installations more economical and efficient due to additional heating of the return system water with deaerator flash steam. In this paper, the process of water deaeration is considered on the example of the boiler room of the AB InBev Efes brewery in Ulyanovsk, where the heating station is equipped with automation systems, and the regulation of steam supply for heating is carried out automatically depending on the temperature of the return system water. Due to the designed arrangement and depending on the amount of flash steam of the atmospheric deaerator, the return water of the heating system can be heated by 3 - 10°C. Besides, during periods of warm winters at the Ulyanovsk-based brewery of AB InBev Efes, with minimal loads of the boiler plant, heating of the return system water in the heat exchanger with the flash steam of the atmospheric deaerator may be used as the main or additional stage of heating.

1. Zangeneh Sh., Bakhtiari R. Failure investigation of a deaerating feed-water heater in a power plant / Engineering Failure Analysis 2019; (101): 145 - 156.

2. Pazushkina O. V., Zolin M. V., Morozov D. S. Application of costeffective technology for heating return mains water in boiler plants / Teoreticheskie osnovy teplogazosnabzheniya i ventilyatsii. Sbornik dokladov VIII Vserossiiskoi nauchno-tekhnicheskoi konferentsii, posvyashchennoi stoletiyu MISI-MGSU 2020; (1): 154 - 158. (In Russ.)

3. Chupova A. V., Galkovskii V. A. Deaeration as a way to protect thermal power equipment from corrosion / Internet-zhurnal «NAUKOVEDENIE» 2017, 9(2) [elektronnyi resurs] Rezhim dostupa: http://naukovedenie.ru/PDF/62TVN217.pdf. (In Russ.)

4. Pazushkina O. V., Morozov D. S., Zolin M. V. Application of atmospheric deaerator vapor in heating boilers / Sostoyanie i perspektivy razvitiya elektro- i teplotekhnologii (XXI Benardosovskie chteniya). Materialy mezhdunarodnoi nauchno-tekhnicheskoi konferentsii 2021; (1): 347 - 350. (In Russ.)

5. Leduhovsky G. V. Modeling The Water Decarbonization Processes In Atmospheric Deaerators / Thermal engineering 2017; 64(2): 127 - 133.

6. Orlov M. E., Sharapov V. I. About the results of experimental study performed on a «decarbonizer-vacuum deaerator» system / IOP Conference Series: Earth and Environmental Science 2019.

7. Sharapov V. I. The vapor of thermal deaerators as a factor of their energy efficiency // Power Technology and Engineering 2020; (1): 96 - 100.

8. Calculation of the minimum specific evaporation rate / Pazushkina O. V., Vryasov V. S. Svidetel'stvo o registratsii programmy dlya EVM № 2021613479. Reg. ot 09.03.2021. (In Russ.)

9. Sharapov V. I. About the evaporation of thermal deaerators as a factor of their energy efficiency // Elektricheskie stantsii 2019; (12): 14 - 19. (In Russ.)

10. Sharapov V. I., Kamalova R. I. Degassing of water with exhaust gases of the boiler // IOP Conference Series: Earth and Environmental Science 2019.