ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ
The work is devoted to research on creating conditions for the safe operation of gas exhaust ducts of solid waste incineration plants. The operation of these ducts is characterized by difficult conditions that lead to their corrosion destruction, especially the last section of the duct - the chimney...
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| Date: | 2025 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | Ukrainian |
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Institute of Engineering Thermophysics of NAS of Ukraine
2025
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| Online Access: | https://ihe.nas.gov.ua/index.php/journal/article/view/611 |
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| Journal Title: | Thermophysics and Thermal Power Engineering |
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Thermophysics and Thermal Power Engineering| _version_ | 1856543870192451584 |
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| author | Fialko, N. Navrodska, R. Zhuchenko, I Shevchuk, S. Gnedash, G. |
| author_facet | Fialko, N. Navrodska, R. Zhuchenko, I Shevchuk, S. Gnedash, G. |
| author_sort | Fialko, N. |
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| collection | OJS |
| datestamp_date | 2025-04-22T05:19:08Z |
| description | The work is devoted to research on creating conditions for the safe operation of gas exhaust ducts of solid waste incineration plants. The operation of these ducts is characterized by difficult conditions that lead to their corrosion destruction, especially the last section of the duct - the chimney. The development of measures for the chimneys corrosion protection in the case of using deep flue gas heat recovery systems requires special attention due to the likely high humidity and high chemical aggressiveness of these gases. The purpose of the study is to analyze the indicators of thermal and humidity state in the chimney mouth of a waste incinerator plant with a water-heating boiler in its different operation modes under the conditions of using the technology of deep cooling of exhaust gases and thermal methods of preventing condensation in gas exhaust ducts. The main objectives of the study were to perform thermal calculations of the boiler with the proposed heat recovery system and to establish patterns of change in the main thermal and humidity indicators at the mouth of the reinforced concrete chimney under different boiler operating conditions. Known thermal calculation methods of heat and power plants installations and the results of our own research on heat exchange during deep cooling of exhaust gases were used. The results on the effectiveness of using the methods of heat and humidity treatment of flue gases after heat recovery to prevent condensation in the reinforced concrete chimney of the considered boiler are presented. Three thermal methods were investigated: bypassing a part of the boiler exhaust gases past the heat recovery system, drying the cooled gases in a gas-heater, and mixing a part of the air heated in the system with these gases. The regularities of changes in thermal and humidity indicators in the chimney mouth are established and the limits of effective application of each method under different conditions are determined. It is shown that the bypassing method is not effective for preventing condensation under all the conditions considered; the drying method gives positive results for preventing condensation in the chimney mouth at high boiler loads corresponding to low ambient temperatures (tamb < -5°С), high gas temperatures at the boiler outlet (tginp > 200°С) and at the levels of heating of cooled gases in the gas-heater Δt, which mostly exceed 30°С; the air method at the share of σ (up to 30 %) of the mixed air ensures the prevention of condensation in the chimney mouth in boiler operating conditions close to the nominal. It is also shown that the heat consumption for the implementation of the air method is the lowest compared to the other two methods. |
| first_indexed | 2025-12-17T13:56:12Z |
| format | Article |
| id | oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-611 |
| institution | Thermophysics and Thermal Power Engineering |
| language | Ukrainian |
| last_indexed | 2025-12-17T13:56:12Z |
| publishDate | 2025 |
| publisher | Institute of Engineering Thermophysics of NAS of Ukraine |
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| spelling | oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-6112025-04-22T05:19:08Z PROBLEMS OF GAS EXHAUST DUCTS OPERATIONAL RELIABILITY OF MUNICIPAL SOLID WASTE INCINERATION PLANTS AND WAYS TO SOLVE THEM ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ Fialko, N. Navrodska, R. Zhuchenko, I Shevchuk, S. Gnedash, G. The work is devoted to research on creating conditions for the safe operation of gas exhaust ducts of solid waste incineration plants. The operation of these ducts is characterized by difficult conditions that lead to their corrosion destruction, especially the last section of the duct - the chimney. The development of measures for the chimneys corrosion protection in the case of using deep flue gas heat recovery systems requires special attention due to the likely high humidity and high chemical aggressiveness of these gases. The purpose of the study is to analyze the indicators of thermal and humidity state in the chimney mouth of a waste incinerator plant with a water-heating boiler in its different operation modes under the conditions of using the technology of deep cooling of exhaust gases and thermal methods of preventing condensation in gas exhaust ducts. The main objectives of the study were to perform thermal calculations of the boiler with the proposed heat recovery system and to establish patterns of change in the main thermal and humidity indicators at the mouth of the reinforced concrete chimney under different boiler operating conditions. Known thermal calculation methods of heat and power plants installations and the results of our own research on heat exchange during deep cooling of exhaust gases were used. The results on the effectiveness of using the methods of heat and humidity treatment of flue gases after heat recovery to prevent condensation in the reinforced concrete chimney of the considered boiler are presented. Three thermal methods were investigated: bypassing a part of the boiler exhaust gases past the heat recovery system, drying the cooled gases in a gas-heater, and mixing a part of the air heated in the system with these gases. The regularities of changes in thermal and humidity indicators in the chimney mouth are established and the limits of effective application of each method under different conditions are determined. It is shown that the bypassing method is not effective for preventing condensation under all the conditions considered; the drying method gives positive results for preventing condensation in the chimney mouth at high boiler loads corresponding to low ambient temperatures (tamb < -5°С), high gas temperatures at the boiler outlet (tginp > 200°С) and at the levels of heating of cooled gases in the gas-heater Δt, which mostly exceed 30°С; the air method at the share of σ (up to 30 %) of the mixed air ensures the prevention of condensation in the chimney mouth in boiler operating conditions close to the nominal. It is also shown that the heat consumption for the implementation of the air method is the lowest compared to the other two methods. Наведено результати досліджень щодо використання трьох методів тепловологісної обробки димових газів після теплоутилізації для запобігання конденсатоутворенню в газовідвідних трактах сміттєспалювальної установки з водогрійним котлом. Встановлено закономірності зміни тепловологісних показників в гирлі залізобетонної димової труби в різних режимах котла. Визначено межі результативного застосування кожного з методів для різних умов. Institute of Engineering Thermophysics of NAS of Ukraine 2025-03-31 Article Article application/pdf https://ihe.nas.gov.ua/index.php/journal/article/view/611 Thermophysics and Thermal Power Engineering; Vol 47 No 1 (2025): Thermophysics and Thermal Power Engineering; 7-18 Теплофизика и Теплоэнергетика; Vol 47 No 1 (2025): Thermophysics and Thermal Power Engineering; 7-18 Теплофізика та Теплоенергетика; Vol 47 No 1 (2025): Thermophysics and Thermal Power Engineering; 7-18 2663-7235 uk https://ihe.nas.gov.ua/index.php/journal/article/view/611/532 https://creativecommons.org/licenses/by/4.0/deed.ru |
| spellingShingle | Fialko, N. Navrodska, R. Zhuchenko, I Shevchuk, S. Gnedash, G. ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ |
| title | ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ |
| title_alt | PROBLEMS OF GAS EXHAUST DUCTS OPERATIONAL RELIABILITY OF MUNICIPAL SOLID WASTE INCINERATION PLANTS AND WAYS TO SOLVE THEM |
| title_full | ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ |
| title_fullStr | ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ |
| title_full_unstemmed | ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ |
| title_short | ПРОБЛЕМИ ЕКСПЛУАТАЦІЙНОЇ НАДІЙНОСТІ ГАЗОВІДВІДНИХ ТРАКТІВ УСТАНОВОК СПАЛЮВАННЯ ТВЕРДИХ ПОБУТОВИХ ВІДХОДІВ ТА ШЛЯХИ ЇХ ВИРІШЕННЯ |
| title_sort | проблеми експлуатаційної надійності газовідвідних трактів установок спалювання твердих побутових відходів та шляхи їх вирішення |
| url | https://ihe.nas.gov.ua/index.php/journal/article/view/611 |
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