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Studies Concerning Water-Surface Deposits in Recovery Boilers

Abstract

The Feed-water Committee of the Stiftelsen Svensk Cellulosaforskning (Foundation for Swedish Cellulose Research) has initiated research and investigations which aim to increase knowledge about water-surface deposits in boiler tubes, and the resulting risks of gas-surface corrosion in chemical recovery boilers (sulphate pulp industry). The Committee has arranged with AB Atomenergi, Studsvik, for investigations into the water-surface deposits on tubes from six Scandinavian boilers. These investigations have included direct measurements of the thermal conductivity of the deposits, and determinations of their quantity, thickness and structure have been carried out. Previous investigations have shown that gas-surface corrosion can occur at tube temperatures above 330 deg C. The measured values for the thermal conductivity of the deposits indicate that even with small quantities of deposit (c. 1 g/dm2 ) and a moderate boiler pressure (40 atm), certain types of deposit can give rise to the above-mentioned surface temperature, at which the risk of gas-surface corrosion becomes appreciable. For higher boiler pressures the risk is great even with a minimal layer of deposit. The critical deposit thickness can be as low as 0.1 mm
Publication Date:
Nov 15, 1971
Product Type:
Technical Report
Report Number:
AE-438
Resource Relation:
Other Information: 24 refs., 42 figs., 19 tabs.
Subject:
42 ENGINEERING; 09 BIOMASS FUELS; BOILERS; DEPOSITION; TUBES; CORROSION; ENERGY RECOVERY; SPENT LIQUORS
OSTI ID:
922445
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0808006
Availability:
Commercial reproduction prohibited; OSTI as DE00922445
Submitting Site:
SWDN
Size:
146 pages
Announcement Date:
Jan 25, 2008

Citation Formats

Strandberg, O, Arvesen, J, and Dahl, L. Studies Concerning Water-Surface Deposits in Recovery Boilers. Sweden: N. p., 1971. Web.
Strandberg, O, Arvesen, J, & Dahl, L. Studies Concerning Water-Surface Deposits in Recovery Boilers. Sweden.
Strandberg, O, Arvesen, J, and Dahl, L. 1971. "Studies Concerning Water-Surface Deposits in Recovery Boilers." Sweden.
@misc{etde_922445,
title = {Studies Concerning Water-Surface Deposits in Recovery Boilers}
author = {Strandberg, O, Arvesen, J, and Dahl, L}
abstractNote = {The Feed-water Committee of the Stiftelsen Svensk Cellulosaforskning (Foundation for Swedish Cellulose Research) has initiated research and investigations which aim to increase knowledge about water-surface deposits in boiler tubes, and the resulting risks of gas-surface corrosion in chemical recovery boilers (sulphate pulp industry). The Committee has arranged with AB Atomenergi, Studsvik, for investigations into the water-surface deposits on tubes from six Scandinavian boilers. These investigations have included direct measurements of the thermal conductivity of the deposits, and determinations of their quantity, thickness and structure have been carried out. Previous investigations have shown that gas-surface corrosion can occur at tube temperatures above 330 deg C. The measured values for the thermal conductivity of the deposits indicate that even with small quantities of deposit (c. 1 g/dm2 ) and a moderate boiler pressure (40 atm), certain types of deposit can give rise to the above-mentioned surface temperature, at which the risk of gas-surface corrosion becomes appreciable. For higher boiler pressures the risk is great even with a minimal layer of deposit. The critical deposit thickness can be as low as 0.1 mm}
place = {Sweden}
year = {1971}
month = {Nov}
}