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Degassing and desalination with sulfite dosage and reverse osmosis; Avgasning och avsaltning med sulfitdosering och omvaend osmos

Technical Report:

Abstract

Degasification of excess water without the supply of steam has always caused certain problems. The most common methods require that steam or hot water at a temperature above 110 degrees C is available or that the water is electrically heated. The reason is that the most common techniques is based on thermal degasification. This project has been carried out in order to evaluate the possibilities of degassing the excess water without heating. The method is based on the fact that the sulphite reacts with the oxygen in the water and forms sulphate. By means of the RO-technique (Reversed Osmosis), the sulphate is removed from the excess water. The project has been performed in pilot plant scale. The advantage of this combinations is that, except for the degasification; the salt contents, particles, humus and collides are reduced, too. The degasification worked very well and the oxygen contents were reduced to <5 ppb at the laboratory tests. A stoichiometric surplus of sulphite of 30% compared to the oxygen contents was sufficient. The risk of the sulphate being stopped up on the membrane surfaces of the RO-equipment was very carefully observed. No such symptoms could be found during the tests. The tests were  More>>
Authors:
Bauer, T; Ohlsson, M [1] 
  1. AaF Energikonsult, Stockholm AB (Sweden)
Publication Date:
Sep 01, 1993
Product Type:
Technical Report
Report Number:
SVF-478
Reference Number:
SCA: 420200; PA: SWD-93:007430; EDB-94:020444; NTS-94:008807; ERA-19:007155; SN: 94001129810
Resource Relation:
Other Information: PBD: Sep 1993
Subject:
42 ENGINEERING; WATER; DEGASSING; DESALINATION; OSMOSIS; SULFITES; BENCH-SCALE EXPERIMENTS; EXPERIMENTAL DATA; 420200; FACILITIES, EQUIPMENT, AND TECHNIQUES
OSTI ID:
10117212
Research Organizations:
Stiftelsen foer Vaermeteknisk Forskning, Stockholm (Sweden)
Country of Origin:
Sweden
Language:
Swedish
Other Identifying Numbers:
Other: ON: DE94730449; TRN: SE9307430
Availability:
OSTI; NTIS
Submitting Site:
SWD
Size:
29 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Bauer, T, and Ohlsson, M. Degassing and desalination with sulfite dosage and reverse osmosis; Avgasning och avsaltning med sulfitdosering och omvaend osmos. Sweden: N. p., 1993. Web.
Bauer, T, & Ohlsson, M. Degassing and desalination with sulfite dosage and reverse osmosis; Avgasning och avsaltning med sulfitdosering och omvaend osmos. Sweden.
Bauer, T, and Ohlsson, M. 1993. "Degassing and desalination with sulfite dosage and reverse osmosis; Avgasning och avsaltning med sulfitdosering och omvaend osmos." Sweden.
@misc{etde_10117212,
title = {Degassing and desalination with sulfite dosage and reverse osmosis; Avgasning och avsaltning med sulfitdosering och omvaend osmos}
author = {Bauer, T, and Ohlsson, M}
abstractNote = {Degasification of excess water without the supply of steam has always caused certain problems. The most common methods require that steam or hot water at a temperature above 110 degrees C is available or that the water is electrically heated. The reason is that the most common techniques is based on thermal degasification. This project has been carried out in order to evaluate the possibilities of degassing the excess water without heating. The method is based on the fact that the sulphite reacts with the oxygen in the water and forms sulphate. By means of the RO-technique (Reversed Osmosis), the sulphate is removed from the excess water. The project has been performed in pilot plant scale. The advantage of this combinations is that, except for the degasification; the salt contents, particles, humus and collides are reduced, too. The degasification worked very well and the oxygen contents were reduced to <5 ppb at the laboratory tests. A stoichiometric surplus of sulphite of 30% compared to the oxygen contents was sufficient. The risk of the sulphate being stopped up on the membrane surfaces of the RO-equipment was very carefully observed. No such symptoms could be found during the tests. The tests were carried out at an intermittent operation and the long range effect is therefore not completely clear. The good results of the laboratory tests point at the fact that the technique has large prospects to become very useable. The construction of commercial plants has been based on this investigation. 3 refs, 4 figs}
place = {Sweden}
year = {1993}
month = {Sep}
}