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Pregled bibliografske jedinice broj: 749802

The Ash Deposition Mechanism in Boilers Burning Zhundong Coal with High Contents of Sodium and Calcium: a Study from Ash Evaporating to Condensing


Wang, Xuebin; Xu, Zhaoxia; Wei, Bo; Zhang, Lan; Tan, Houzhang; Yang, Tao; Mikulčić, Hrvoje; Duić, Neven
The Ash Deposition Mechanism in Boilers Burning Zhundong Coal with High Contents of Sodium and Calcium: a Study from Ash Evaporating to Condensing // Applied thermal engineering, 80 (2015), 150-159 doi:10.1016/j.applthermaleng.2015.01.051 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 749802 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
The Ash Deposition Mechanism in Boilers Burning Zhundong Coal with High Contents of Sodium and Calcium: a Study from Ash Evaporating to Condensing

Autori
Wang, Xuebin ; Xu, Zhaoxia ; Wei, Bo ; Zhang, Lan ; Tan, Houzhang ; Yang, Tao ; Mikulčić, Hrvoje ; Duić, Neven

Izvornik
Applied thermal engineering (1359-4311) 80 (2015); 150-159

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Zhundong Coal; Ash deposition; Sodium; Calcium; Sulfur

Sažetak
The high contents of sodium and calcium in Zhundong coal induce severe slagging and ash deposition in boilers. In this study, the ash deposition mechanism was investigated based on the results obtained from a full-scale boiler (350 MW) burning Zhundong coal, and a fixed bed reactor used for ash evaporating- condensing. In the full-scale boiler, the condensing and depositing of sodium and calcium sulfates play an important role on ash depositing on convection heating surfaces. Sulfates start to significantly condense and deposit at the flue gas temperature of about 850 oC on the medium and high temperature reheater surfaces. Ash evaporating tests proved that, with the increasing in temperature from 400 oC to 1200 oC, the ash evaporating process is divided into three stages: 1) 400-800 oC, 80% of sodium, and 100% of chlorine are released ; 2) 800-1000 oC, all the left sodium evaporates and sulfur starts to be released with the formation of partial aluminosilicates ; 3) 1000-1200 oC, all the left sulfur is released through the decomposition of calcium sulfates and then calcium starts to evaporate, while silicon oxides disappears due to the formation of new complex silicates. Ash condensing tests further proved that, the sodium in Zhundong coal was released mainly in the forms of atom, oxide, and chloride, in which sodium chloride account for about 50%. When the evaporating temperature increased higher than 1000 oC, partial alkali and alkaline earth metals were released as gaseous sulfates, and afterwards condense and deposit on the heating surfaces. At last, a temperature-dependent ash deposition mechanism in Zhundong coal combustion was proposed.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo



POVEZANOST RADA


Projekti:
120-1201918-1920 - Racionalno skladištenje energije za održivi razvoj energetike (Duić, Neven, MZOS ) ( POIROT)

Ustanove:
Fakultet strojarstva i brodogradnje, Zagreb

Profili:

Avatar Url Hrvoje Mikulčić (autor)

Avatar Url Neven Duić (autor)

Poveznice na cjeloviti tekst rada:

doi http dx.doi.org

Citiraj ovu publikaciju:

Wang, Xuebin; Xu, Zhaoxia; Wei, Bo; Zhang, Lan; Tan, Houzhang; Yang, Tao; Mikulčić, Hrvoje; Duić, Neven
The Ash Deposition Mechanism in Boilers Burning Zhundong Coal with High Contents of Sodium and Calcium: a Study from Ash Evaporating to Condensing // Applied thermal engineering, 80 (2015), 150-159 doi:10.1016/j.applthermaleng.2015.01.051 (međunarodna recenzija, članak, znanstveni)
Wang, X., Xu, Z., Wei, B., Zhang, L., Tan, H., Yang, T., Mikulčić, H. & Duić, N. (2015) The Ash Deposition Mechanism in Boilers Burning Zhundong Coal with High Contents of Sodium and Calcium: a Study from Ash Evaporating to Condensing. Applied thermal engineering, 80, 150-159 doi:10.1016/j.applthermaleng.2015.01.051.
@article{article, year = {2015}, pages = {150-159}, DOI = {10.1016/j.applthermaleng.2015.01.051}, keywords = {Zhundong Coal, Ash deposition, Sodium, Calcium, Sulfur}, journal = {Applied thermal engineering}, doi = {10.1016/j.applthermaleng.2015.01.051}, volume = {80}, issn = {1359-4311}, title = {The Ash Deposition Mechanism in Boilers Burning Zhundong Coal with High Contents of Sodium and Calcium: a Study from Ash Evaporating to Condensing}, keyword = {Zhundong Coal, Ash deposition, Sodium, Calcium, Sulfur} }
@article{article, year = {2015}, pages = {150-159}, DOI = {10.1016/j.applthermaleng.2015.01.051}, keywords = {Zhundong Coal, Ash deposition, Sodium, Calcium, Sulfur}, journal = {Applied thermal engineering}, doi = {10.1016/j.applthermaleng.2015.01.051}, volume = {80}, issn = {1359-4311}, title = {The Ash Deposition Mechanism in Boilers Burning Zhundong Coal with High Contents of Sodium and Calcium: a Study from Ash Evaporating to Condensing}, keyword = {Zhundong Coal, Ash deposition, Sodium, Calcium, Sulfur} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





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