| Title: | HRSG system description and water-steam analysis at the HRSG cold start-up |
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| Authors: | ID Strušnik, Dušan (Author) |
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| Files: |  HRSG_system_description_Strusnik_2021.pdf (4,58 MB)
MD5: E6F89F3E6BAA3B49F5C383E389935D31
 https://www.fe.um.si/e-jet/44-2021-1/3319-december-2021.html
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FE - Faculty of Energy Technology
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| Abstract: | The basic purpose of this paper is to present the HRSG system description in detail and possibility analysis of preventing the HRSH water-steam generated release into the atmosphere through the sky valves during the HRSG cold start-up. The steam released into the atmosphere by the cross sky valve is not an adequate solution for the following reasons: Noise prevention, water losses, thermal heat release into the environment, etc. In this paper, the possibilities and solutions are investigated in order to avoid the HRSG start-up sky venting. For this purpose, the steam quality data at HRSG cold start-up is analysed, and the possibility is examined of discharging the HRSG generated steam at the start-up via a new start-up pipeline into the existing dump condenser, or into the start-up flash tank or into the blowdown tank. The results show that, at the first 3 minutes of cold start-up, the HRSG generated only water, and this water should not be discharged into the HP or IP pipeline headers. The HRSG generates a mixture of water and steam only after 4 minutes from the start-up. For that reason it is not recommended to drain the water-steam mixture at the HRSG start-up into the new start-up pipeline, but it is recommended to drain the water and steam mixture formed during the HRSG start-up into the new start-up flash tank, or into the blowdown tank. The flash tank, and also the blowdown tank, should be appropriately dimensioned. |
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| Keywords: | boiler, duct, flue gas, heat recovery, stack, steam generator, superheater |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.12.2021 |
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| Publisher: | Fakulteta za energetiko Univerze v Mariboru |
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| Year of publishing: | 2021 |
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| Number of pages: | str. 21-39 |
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| Numbering: | letn. 14, št. 4 |
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| PID: | 20.500.12556/DKUM-86325  |
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| UDC: | 697 |
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| ISSN on article: | 1855-5748 |
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| COBISS.SI-ID: | 99777027 |
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| Publication date in DKUM: | 13.11.2023 |
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| Views: | 598 |
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| Downloads: | 43 |
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| Metadata: |    |
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| Categories: | Misc.
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