Skip to main content
SpringerLink
Log in

Determining the Efficiency of Desorption of Corrosive-Active Gases in Columns with Chaotic and Regular Nozzles

  • WATER TREATMENT AND WATER CHEMISTRY
  • Published:
Thermal Engineering Aims and scope Submit manuscript

Abstract

The process of removing corrosive gases from water at TPPs in packed columns of calciners and in columns of thermal deaerators with a storage tank in film mode is considered and a mathematical model is presented for calculating the efficiency of the desorption process. A cell model of the flow structure and an equation for calculating the mass transfer coefficient for a wave flow of a water film over the surface of a packing with artificial roughness are used. The value of the required height of the packing layer is obtained for the given density of irrigation with water and the efficiency of extracting gases dissolved in water. Formulas are given for calculating the parameters of a mathematical model: the coefficient of mass transfer in the wave film, the average velocity of water in the film, the dynamic retention of the liquid in the packing layer and the number of cells for complete mixing of the liquid phase. The possibility of using metal chaotic and regular packings is considered, and the results of calculations of the efficiency of mass transfer and the required height of the packing layer at various operating parameters of the desorption process are presented. The graphs of the required layer height for the given efficiency of mass transfer and the power spent on air supply to the desorber when using various nozzles of domestic and foreign production are presented. The article describes the operation of a thermal deaerator with a storage tank and outdated contact devices in a deaerator column at a TPP. The main mass transfer and hydraulic characteristics of modern nozzles for thermal deaerators are presented. Technical solutions have been developed that can be used when choosing a highly efficient metal chaotic packing with a rough surface, which provides an increase in the mass transfer coefficient in a liquid wave film and, accordingly, the efficiency of mass transfer. A variant for modernization of the deaeration column of the DSA-300 deaerator at the Kazan CHPP-3 by replacing outdated contact devices with a modern chaotic packing is shown. As a result of its application, compliance with the standards of water purification from dissolved oxygen is ensured at various loads on water and steam.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1.
Fig. 2.

Similar content being viewed by others

REFERENCES

  1. E. U. Yamleeva and V. I. Sharapov, “Investigation of the aeration process of deaerated water in accumulator tanks of combined heat and power plants in Ul’yanovsk,” Vestn. Ul’yanovsk. Gos. Tekh. Univ., No. 1 (81), 42–47 (2018).

  2. G. V. Ledukhovskii, V. N. Vinogradov, S. D. Gorshenin, and A. A. Korotkov, Study of Technological Processes of Atmospheric Deaeration of Water, Ed. by G. V. Ledukhovskii (Ivanov. Gos. Energ. Univ., Ivanovo, 2016) [in Russian].

    Google Scholar 

  3. G. V. Ledukhovskii, “Modeling the water decarbonization processes in atmospheric deaerators,” Therm. Eng. 64, 127–133 (2017). https://doi.org/10.1134/S0040601517020057

    Article  Google Scholar 

  4. Yu. A. Komissarov, L. S. Gordeev, and D. P. Vent, Foundations of Industrial Devices Design and Constructing, 2nd ed. (Yurait, Moscow, 2017) [in Russian].

    Google Scholar 

  5. A. I. Razinov, A. V. Klinov, and G. S. D’yakonov, Processes and Apparatuses of Chemical Technology: Study Aid (Kazan. Nats. Issled. Tekhnol. Univ., Kazan, 2017) [in Russian].

  6. A. G. Laptev and M. M. Basharov, Efficiency of Heat and Mass Transfer and Separation of Heterogeneous Media in Apparatuses of the Petrochemical Complex (Ts. Innovatsionnykh Tekhnol., Kazan, 2016) [in Russian].

    Google Scholar 

  7. A. G. Laptev and E. A. Lapteva, “A mathematical model and design calculation of a thermal deaerator with a bubbling storage tank,” Therm. Eng. 66, 681–686 (2019). https://doi.org/10.1134/S0040601519090027

    Article  Google Scholar 

  8. L. P. Kholpanov and V. Ya. Shkadov, Hydrodynamics and Heatmass Exchange with an Interface (Nauka, Moscow, 1990) [in Russian].

    Google Scholar 

  9. M. M. Farakhov, T. M. Farakhov, and A. G. Laptev, “Hydraulic characteristics of random packing ‘Inzhekhim’ for the gas-liquid contact,” Fundam. Issled., No. 3, 24–28 (2018).

  10. A. M. Kagan, A. G. Laptev, A. S. Pushnov, and M. I. Farakhov, Contact Packings of Industrial Heat and Mass Transfer Apparatuses, Ed. by A. G. Laptev (Otechestvo, Kazan, 2013) [in Russian].

    Google Scholar 

  11. V. M. Ramm, Absorption of Gases, 2nd ed. (Khimiya, Moscow, 1976) [in Russian].

    Google Scholar 

  12. A. S. Kopylov, V. M. Lavygin, and V. F. Ochkov, Water Treatment in Power Engineering, 3rd ed. (Mosk. Energ. Inst., Moscow, 2006) [in Russian].

    Google Scholar 

  13. V. I. Sharapov and D. V. Tsyura, Thermal Deaerators (Ul’yan. Gos. Tekh. Univ., Ul’yanovsk, 2003) [in Russian].

    Google Scholar 

Download references

Funding

The research was carried out with the financial support of the Russian Science Foundation (project no. 18-79-101-36).

Author information

Authors and Affiliations

  1. Kazan State Power Engineering University, 420066, Kazan, Russia

    E. A. Lapteva

  2. OOO Engineering and Implementation Center Inzhekhim, 420032, Kazan, Russia

    M. I. Farakhov

Authors
  1. E. A. Lapteva
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. I. Farakhov
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to E. A. Lapteva.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Lapteva, E.A., Farakhov, M.I. Determining the Efficiency of Desorption of Corrosive-Active Gases in Columns with Chaotic and Regular Nozzles. Therm. Eng. 68, 165–169 (2021). https://doi.org/10.1134/S0040601521010158

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S0040601521010158

Keywords:

Search

Navigation