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On-line alkali monitoring - Part 1; Kontinuerlig alkalimaetning - Etapp 1

Abstract

As a consequence of the increased knowledge of the environmental impact of combustion based heat and power generation, the use of renewable biofuels will be increased. An obstacle associated to biofuel combustion compared to other fuels is the large release of alkali. Alkali compounds in flue gases are known to cause severe operational problems. Three of the major problems are; fouling of superheating tubes (causing reduced heat transfer and possibly corrosion), agglomeration of the bed material in fluidized beds, and poisoning of SCR catalysts. Yet another alkali related problem arises when, in order to increase the electric efficiency of combustion power plants, combined-cycle technology is used. Alkali vapour present in the fuel gas for the gas turbine is condensed to particles which increase corrosion and erosion of the turbine blades. The research on ash related operational problems has to be extended in order to ensure future use of biofuels in heat and power generation. In all successful research, adequate tools are necessary. To investigate ash related problems the key issue is to be able to perform continuous alkali measurements. This pilot study has investigated the need of continuous alkali measurements, which alkali species are harmful in the different applications and  More>>
Publication Date:
Feb 01, 1997
Product Type:
Technical Report
Report Number:
SVF-601
Reference Number:
SCA: 095000; 540120; PA: SWD-97:007291; EDB-97:060353; NTS-97:010253; SN: 97001773959
Resource Relation:
Other Information: DN: Figures with text in English; PBD: Feb 1997
Subject:
09 BIOMASS FUELS; 54 ENVIRONMENTAL SCIENCES; HYDROXIDES; ON-LINE MEASUREMENT SYSTEMS; AIR POLLUTION MONITORING; FLUE GAS; COMBINED CYCLES; BIOMASS
OSTI ID:
464367
Research Organizations:
Stiftelsen foer Vaermeteknisk Forskning, Stockholm (Sweden)
Country of Origin:
Sweden
Language:
Swedish
Other Identifying Numbers:
Journal ID: ISSN 0282-3772; Other: ON: DE97740807; CNN: Project Vaermeforsk-U3-606; TRN: SE9707291
Availability:
INIS; OSTI as DE97740807
Submitting Site:
SWD
Size:
47 p.
Announcement Date:

Citation Formats

Andersson, Christer, Ljung, P, and Woxlin, H. On-line alkali monitoring - Part 1; Kontinuerlig alkalimaetning - Etapp 1. Sweden: N. p., 1997. Web.
Andersson, Christer, Ljung, P, & Woxlin, H. On-line alkali monitoring - Part 1; Kontinuerlig alkalimaetning - Etapp 1. Sweden.
Andersson, Christer, Ljung, P, and Woxlin, H. 1997. "On-line alkali monitoring - Part 1; Kontinuerlig alkalimaetning - Etapp 1." Sweden.
@misc{etde_464367,
title = {On-line alkali monitoring - Part 1; Kontinuerlig alkalimaetning - Etapp 1}
author = {Andersson, Christer, Ljung, P, and Woxlin, H}
abstractNote = {As a consequence of the increased knowledge of the environmental impact of combustion based heat and power generation, the use of renewable biofuels will be increased. An obstacle associated to biofuel combustion compared to other fuels is the large release of alkali. Alkali compounds in flue gases are known to cause severe operational problems. Three of the major problems are; fouling of superheating tubes (causing reduced heat transfer and possibly corrosion), agglomeration of the bed material in fluidized beds, and poisoning of SCR catalysts. Yet another alkali related problem arises when, in order to increase the electric efficiency of combustion power plants, combined-cycle technology is used. Alkali vapour present in the fuel gas for the gas turbine is condensed to particles which increase corrosion and erosion of the turbine blades. The research on ash related operational problems has to be extended in order to ensure future use of biofuels in heat and power generation. In all successful research, adequate tools are necessary. To investigate ash related problems the key issue is to be able to perform continuous alkali measurements. This pilot study has investigated the need of continuous alkali measurements, which alkali species are harmful in the different applications and also available instrumentation capable of measuring the specific alkali species. The report gives a short summary presenting alkali related operational problems. In addition a schematic overview is given, showing the alkali species that possibly can exist in various parts of the power plant. 48 refs, 13 figs, 4 tabs}
place = {Sweden}
year = {1997}
month = {Feb}
}