Analysis of fouling degree of individual heating surfaces in a pulverized coal fired boiler
Authors:
- Paweł Madejski,
- Tomasz Janda,
- Jan Taler,
- Daniel Nabagło,
- Robert Węzik,
- Magdalena Mazur
Abstract
The paper presents the method of fouling degree evaluation of the heating surfaces in pulverized coal-fired boiler during coal combustion and biomass co-combustion. The fouling processes have a negative impact on the boiler operation by reducing the steam outlet temperature, increasing the mass flow rate of cooling spray water, and may be the reason for overheating of the superheater (SH) tube material. This leads to a reduction of the boiler efficiency and can cause shortening of a lifetime as well as damage of boiler heat exchangers, in particular, the steam SH. The basis of fouling degree assessment method are the dimensionless coefficients, which represent current values of heat absorbed by an individual heat exchanger in comparison to the value for a clean surface. The coefficients are determined based on the calculated heat power of individual heat exchanger taking into account the adjustment resulting from the flue gas temperature inside a combustion chamber. The results of the analysis showed a significant reduction of the amount of heat absorbed by the convection SH during continuous boiler operation. The next important conclusion is a large increase of the heat amount transferred to the radiant SH, which may result in exceeding the permissible temperature of the tube material. The proposed method together with on-line monitoring system installed on the boiler is used to calculate the fouling degree of individual heating surfaces. Accurate monitoring of boiler heating surface conditions can be used to optimize soot blowers operation and finally to improve process efficiency.
- Record ID
- CUT961870f2d5854d87ac845795e548c219
- Publication categories
- ;
- Author
- Journal series
- Journal of Energy Resources Technology-Transactions of the Asme, ISSN 0195-0738, e-ISSN 1528-8994
- Issue year
- 2018
- Vol
- 140
- No
- 3
- Pages
- [1-8]
- Article number
- JERT-16-1503
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 8; Bibliografia (liczba pozycji) - 35; Oznaczenie streszczenia - Streszcz. ang.; Numeracja w czasopiśmie - Vol. 140, Iss. 3
- Keywords in English
- coal combustion, biomass co-combustion, fouling, superheater, monitoring
- DOI
- DOI:10.1115/1.4037936 Opening in a new tab
- URL
- http://energyresources.asmedigitalcollection.asme.org/article.aspx?articleid=2654684&resultClick=1 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 25
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT961870f2d5854d87ac845795e548c219/
- URN
urn:pkr-prod:CUT961870f2d5854d87ac845795e548c219
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.