skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hot Gas Particulate Cleaning Technology Applied for PFBC/IGFC -The Ceramic Tube Filter (CTF) and Metal Filter-

Abstract

Coal is a fossil fuel abundant and widespread all over world. It is a vital resource for energy security, because the supply is stable. However, its CO2 emission per unit calorific value is greater than that of other fossil fuels. It is necessary to develop more efficient coal utilization technologies to expand the coal utilization that meets the social demand for better environment. The Pressurized Fluidized Bed Combustion (PFBC) combined cycle has become a subject of world attention in terms of better plant operation, improved plant efficiency, lower flue gas emission and fuel flexibility. The gas turbine, one of the most important components in the PFBC, is eager for a hot gas (approximately 650-850C) cleaning system in order to eliminate the severe erosion problem with the less thermal loss. The cyclone is most popular system for a hot gas cleaning, however, the severe damage for gas turbine blades by highly concentrated fine fly ash from PFBC boiler is reported.

Authors:
; ; ;
Publication Date:
Research Org.:
Electric Power Development Co., Ltd, Technology Development Center, Japan; Electric Power Development Co., Ltd, Wakamatsu Research Center, Japan
OSTI Identifier:
835769
Resource Type:
Conference
Resource Relation:
Conference: 5th International Symposium on Gas Cleaning at High Temperatures, Morgantown, WV (US), 17-20 September 2002
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; Ceramic tube filter (CTF); Pressure Drop Performance; Metal Filter

Citation Formats

Sasatsu, H, Misawa, N, Kobori, K, and Iritani, J. Hot Gas Particulate Cleaning Technology Applied for PFBC/IGFC -The Ceramic Tube Filter (CTF) and Metal Filter-. United States: N. p., 2002. Web.
Sasatsu, H, Misawa, N, Kobori, K, & Iritani, J. Hot Gas Particulate Cleaning Technology Applied for PFBC/IGFC -The Ceramic Tube Filter (CTF) and Metal Filter-. United States.
Sasatsu, H, Misawa, N, Kobori, K, and Iritani, J. Wed . "Hot Gas Particulate Cleaning Technology Applied for PFBC/IGFC -The Ceramic Tube Filter (CTF) and Metal Filter-". United States. doi:. https://www.osti.gov/servlets/purl/835769.
@article{osti_835769,
title = {Hot Gas Particulate Cleaning Technology Applied for PFBC/IGFC -The Ceramic Tube Filter (CTF) and Metal Filter-},
author = {Sasatsu, H and Misawa, N and Kobori, K and Iritani, J},
abstractNote = {Coal is a fossil fuel abundant and widespread all over world. It is a vital resource for energy security, because the supply is stable. However, its CO2 emission per unit calorific value is greater than that of other fossil fuels. It is necessary to develop more efficient coal utilization technologies to expand the coal utilization that meets the social demand for better environment. The Pressurized Fluidized Bed Combustion (PFBC) combined cycle has become a subject of world attention in terms of better plant operation, improved plant efficiency, lower flue gas emission and fuel flexibility. The gas turbine, one of the most important components in the PFBC, is eager for a hot gas (approximately 650-850C) cleaning system in order to eliminate the severe erosion problem with the less thermal loss. The cyclone is most popular system for a hot gas cleaning, however, the severe damage for gas turbine blades by highly concentrated fine fly ash from PFBC boiler is reported.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 18 00:00:00 EDT 2002},
month = {Wed Sep 18 00:00:00 EDT 2002}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • The crucial characteristics required for the ceramic filter material for applications in advanced fossil energy power generation, i.e., PFBC and IGCC are thermal shock resistance and structural stability at high temperature, high steam pressure condition. Among various candidates, the direct bonded Cordierite currently used in the Advanced Ceramic Tube Filter of Asahi Glass Co (AGC) will be one of the best materials for this purpose. Through the enormous experiences of ACTF units in various PFBC pilot plants, however, the current material could not sufficiently cope with possible boiler upset which is assumed to be inevitable in PFBC, even is somemore » counter measures to moderate temperature excursion are taken. Therefore, AGC has developed a tougher low thermal expansion cordierite tubes. The thermal expansion coefficient of new material is 1.0 {times} 10{sup {minus}6}/C significantly lower compared with that of the current tube of 1.8 {times} 10{sup {minus}6}/C. The new tubes have been tested at the ACTF in Ishikawajima Harima Heavy Industries (IHI) Aioi since August, 1993 and nearly 1,000 hours of running experience has been accumulated so far, demonstrating stability in pressure drop and resistance against repeated temperature excursion of 350 C to 400 C. According to the fatigue test results conducted on test pieces at 900 C, the lifetime of the new material is 10 to 100 times as long a/s that of the current one. Based on these results, it is planned that all tubes in the ACTF at the 71MW PFBC Demonstration Plant at Wakamatsu, Electric Power Development Co. (EPDC) will be replaced by new ones by June, 1997. This paper presents the characteristics of the new material obtained by various tests as well as operational results of the ACTF obtained in the field pilot tests.« less
  • Increasing prosperity and the steady growth of the world population lead to a strongly rising energy requirement. Therefore the saving of the available resources as well as the limitation of CO{sub 2}-emission are the main reasons for developing highly efficient power stations. The use of combined cycle technology for advanced coal fired power plants allow a significantly higher conversion efficiency than it is possible in an only steam power plant. In order to increase the gas turbine inlet temperature, the filtration of fine particles is necessary. Therefore the filtration unit is one of the key components of the circulating pressurizedmore » fluidized bed combustion technology (PFBC). To use this technology more effectively, gas cleaning at high temperatures or in an reducing atmosphere is necessary. A possibility of the effective gas cleaning at high temperatures is the use of porous ceramic candle filters. The structure of such filter elements usually consists of a highly porous sup port which ensures the mechanical strength and a layer which operates as the functional part for the particle removal. To ensure a guaranteed lifetime of about 16000 h the effect of combustion or gasification atmosphere and temperature on the thermal and mechanical properties of the filter material has to be studied. The examinations and results, described in this article, are part of some previous work. This paper focuses especially on the chemical resistance and the thermal behaviour of the used ceramic filter materials.« less
  • The objective of this study is to evaluate changes in structure and mechanical properties of ceramic filter materials under simulated corrosive process conditions. Due to an analysis of the mechanisms of degradation firstly an optimization of materials shall be enabled and secondly a material selection for specific applications shall be relieved. This publication describes the investigations made on many ceramic support materials based on oxides and carbides. Both commercially available and newly developed support materials have been evaluated for specific applications in hot gas cleaning.
  • A kind of sintered metal candle filter has been developed to enable the performance testing for use in hot coal gas clean-up. The intention of this paper is to provide a brief overview of development of the filter, and to provide a summary of experimental results that have been gained in testing at a pilot gasifier. Two different types of stainless steel were chosen as the material to build the filter. The operational temperature range is 460--650 C. The typical inlet dust concentration is 1.0--37.71g/Nm{sup 3}. Results show the average collection efficiency is higher than 99%, the outlet dust concentrationmore » is lower than 10mg/Nm{sup 3}, which reaches the requirement of gas turbines in IGCC. The pressure drop is about 8,300--17,400Pa, and the back blowing of the filter proves to be very good. At present only single-tube testing was conducted. The multi-tube testing facility will be established, and the authors will perform the tests under the condition of high pressure to obtain more experience for design and operation.« less
  • The ACTF installed at the 71MWe pressurized fluidized bed combustion (PFBC) demonstration plant at Wakamatsu Power Station of Electric Power Development Co., Ltd. is the first demonstration scale ceramic filter system for high temperature and high pressure application. The ACTF is featured by inside to outside gas flow configuration with enhanced downward flow by a self circulation blowdown system, vertically arranged tubes in three compartments, reverse cleaning system with regenerators and water cooled tube sheets. A extinguishing powder injection system is also provided to protect filter tubes from abnormal boiler operation such as unburned carbon combustion within the filter system.more » This paper reviews the latest operating experiences of the ACTF at Wakamatsu and design improvements required to realize the ACTF system for the commercial PFBC plants.« less