Efficiency assessment of bi-radiated screens and improved convective set of tubes during the modernization of PTVM-100 tower hot-water boiler based on controlled all-mode mathematic models of boilers on Boiler Designer software

Orumbayev, R.K.; Kibarin, A.A.; Khodanova, Tatyana Viktorovna; Korobkov, M.S.

doi:10.1088/1755-1315/136/1/012016

Cited by 3 publications

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“…Rated efficiency of PTVM boilers operated on fuel oil and under nominal load is less than 87% [1,2,3]. The biggest difficulties arise during the operation of the boiler on sulfur fuel oil due to the corrosion of screens and convective part caused by sulfuric acid, which action is enhanced even more by often washes of heating surfaces and build-up of ash residue in the convective part.…”

Section: Reliability and Energy Efficiency Analysis Of Ptvm Hot-watermentioning

confidence: 99%

“…Low reliability, in it's turn, causes the increase of repair works and operational costs. Operational disadvantages may be divided into structural, design and operational types, mainly connected with violation of furnace, water-chemical and hydraulic conditions [1,6,7,8].…”

Section: Reliability and Energy Efficiency Analysis Of Ptvm Hot-watermentioning

confidence: 99%

“…Authors assume that short period of time, which fuel spend in furnace under excessive load, rapid cooling of gases in convective section, lack of air pre-heating system and it's injection into the furnace with low speed -are all considered to be conditions of for soot and ash formation in furnace as well as on convective heating elements. Such deposits tend to absorb sulfuric anhydride [1,10,11]. According to researches [11,12] the analysis of deposits shows more or less the following content of substances: carbon -50-70%, ashes -30-50%, the content of free H 2 SO 4 is up to 6% (SO 3 -47%).…”

Section: Reliability and Energy Efficiency Analysis Of Ptvm Hot-watermentioning

confidence: 99%

“…Nowadays, many medium capacity hot-water boilers with outdated design are operated across the Republic of Kazakhstan and show low efficiency and reliability rates. Overall designs of KV-GM and PTVM hot-water boilers were developed during the middle of the XX century [1,2]. Many of those currently operated PTVM boilers have exceeded their service life and in order to correspond to the modern ecological and technical requirements, they have to be either replaced or improved.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive technologies for increase of reliability and energy efficiency of medium capacity PTVM and KVGM hot-water boilers

et al. 2019

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This article is dedicated to the problems of reliability, long-term thermal capacity and operational efficiency rate of PTVM and KGVM hot-water boilers. Based on the analysis of statistic data, tests, and certain works on increase of efficiency and reliability of PTVM-100 tower hot-water boilers, which were performed in Kazakhstan, it may be said that the reconstruction of PTVM-100 boilers accomplished on CHP was mainly aimed at the increase of reliability while saving the operational efficiency of boilers almost without changes. If the boiler is operating on fuel oil and without periodical washes, then it is possible to achieve consistent operation only under 75% of the nominal operational load. Structural changes of the PTVM-100 boiler unit offered by authors, along with the increase of operational reliability on fuel oil and it’s thermal capacity, allow increasing boiler’s efficiency rate up to 91-92% if it is operated under nominal load and using fuel oil. Structure the new KV-GM 55 hot-water boiler with horizontal design includes the two-row bi-radiated screen wrapping around the furnace and the new arrangement of convective packs, which are now located next to each other, allowed to increase heating characteristics of the boiler significantly due to the intensification of heat exchange and decrease of temperature of gases released from behind of the boiler unit, as well as to increase boiler’s efficiency rate up to 92,5% under nominal load.

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Section: Reliability and Energy Efficiency Analysis Of Ptvm Hot-watermentioning

confidence: 99%

Section: Reliability and Energy Efficiency Analysis Of Ptvm Hot-watermentioning

confidence: 99%

Section: Reliability and Energy Efficiency Analysis Of Ptvm Hot-watermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comprehensive technologies for increase of reliability and energy efficiency of medium capacity PTVM and KVGM hot-water boilers

et al. 2019

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“…На рис. 2 представлены сравнительные характеристики по отношению конвективной поверхности Н к к радиационной поверхности Н р для водогрейных котлов с классической компоновкой [1,[9][10][11]…”

Section: материалы и методы исследованияunclassified

Development and Operation Experience of Horizontal Kv-Gm-55-150 Hot-Water Boiler

Orumbaev¹,

Kibarin²,

Korobkov³

et al. 2018

СНТ (MHT)

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Настоящая статья посвящена проблемам разработки экономичных сейсмостойких водогрейных котлов. Существующую проблему для районов с повышенной сейсмичностью авторы предложили решить, разработав сейсмостойкие горизонтальные конструкции водогрейных котлов КВ-ГМ тепловой мощностью 35-55 МВт с размещением их в зданиях котельных высотой до 9,0 м, т.е. значительно ниже существующих зданий котельных с серийными вертикально ориентированными водогрейными котлами. В работе показано, что разработанные авторами горизонтальные водогрейные котлы работают экономично и надежно с 2011 г. в ряде котельных г. Алматы. Тепловые испытания, проведенные на котле № 5 котельной «Акселькент», подтвердили высокие технико-экономические показатели работы котла. Тепловая мощность котла в процессе испытаний изменялась от 25,18 МВт (21,71 Гкал/час) до 49,6 МВт (42,77 Гкал/час), расход газа калорийностью 8289,3 ккал/м 3 варьировался от 2700 м 3 /час до 5566 м 3 /час. Избыток воздуха α в уходящих газах составил соответственно от 1,36 до 1,16. На номинальной нагрузке по результатам экстраполяции экспериментальных данных температура уходящих газов составила 160 °С, а КПД брутто котла 92,5 %. В настоящее время по результатам теплотехнических испытаний водогрейный котел доработан, в топочной камере установлен дополнительный двухрядный огибающий экран, который позволил заметно улучшить тепловые характеристики котла за счет интенсификации теплообмена и снизить температуру уходящих газов за котлом с увеличением КПД котла до уровня 93-93,5 % на номинальной нагрузке. Ключевые слова: водогрейный котел, тепловые испытания, двусветный экран, радиационный и конвективный теплообмен, повышение надежности, эффективность работыThe article is dedicated to problems of development of the economical efficient and seismic resistant hot-water boilers. This problem for high seismic level regions authors propose to solve by development of constructions of the seismic resistant horizontal KV-GM hot-water boilers of the heat power output of 35-55 MW. The location of boilers could be into the boiler houses with max high of 9m and it is much lower than the conventional existed boiler houses with the typical vertical hot-water boilers. In the article is mentioned that developed horizontal hot-water boilers works with high levels of reliability and efficiency on the modernized boiler houses in Almaty city since 2011. Provided thermal tests of the boiler № 5 of «Aksel'kent» boiler house approved its high techno-economic operation parameters. During the tests the heat power output of the boiler were increasing from 25.18 MW (21.71 Gcal/hr) up to 49.6 MW (42.77 Gcal/hr), gas flow (gas net heat value 8289.3 ccal/m 3 ) measures were from 2700 m 3 /hr up to 5566 m 3 /hr. Air excess level (α) of the flue gases was between 1.36 and 1.16 accordingly to the named power output rates. Results of the extrapolation of the experimental data of the boiler operation on nominal heat rate shows that the temperature of the flue gases is 160 o C and the boiler efficiency rate brut is 92.5 %. Today ba...

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Study of Direct-Flow Pulverized Coal Boiler Start- Up Modes Using the Boiler Designer Program

Supranov,

Pleshanov,

Khokhlov

et al. 2024

2024 7th International Conference on Information Technologies in Engineering Education (Inforino)

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Efficiency assessment of bi-radiated screens and improved convective set of tubes during the modernization of PTVM-100 tower hot-water boiler based on controlled all-mode mathematic models of boilers on Boiler Designer software

Cited by 3 publications

References 0 publications

Comprehensive technologies for increase of reliability and energy efficiency of medium capacity PTVM and KVGM hot-water boilers

Comprehensive technologies for increase of reliability and energy efficiency of medium capacity PTVM and KVGM hot-water boilers

Development and Operation Experience of Horizontal Kv-Gm-55-150 Hot-Water Boiler

Study of Direct-Flow Pulverized Coal Boiler Start- Up Modes Using the Boiler Designer Program

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