All issues
Volume 32 (1978 - 197･･･
- Issue 6 Pages 287-
- Issue 5 Pages 235-
- Issue 4 Pages 176-
- Issue 3 Pages 117-
- Issue 2 Pages 76-
- Issue 1 Pages 3-
Volume 32, Issue 6
Displaying 1-7 of 7 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1979 Volume 32 Issue 6 Pages 287-300
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSDownload PDF (8777K) -
Haruhiko OHYA, Ryoichi SAKANISHI, Toshihiro SHOJI, Yoshinori TSURUOKA, ...1979 Volume 32 Issue 6 Pages 301-309
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSFor the purpose to investigate the applicability of liquid natural gas (LNG) to direct contact freezing process, desalination of saline water by freezing process using liquid nitrogen instead of LNG was carried out. It was found that there exists a maximum limiting feed rate of liquid nitrogen to keep crystallizer in operation without troubles. The limiting feed rate is considered to be strongly affected by the heat transfer rate between liquid nitrogen and bulk slurry of saline water and ice crystals, and is expressed as a function of stirring condition.
Average diameter of ice crystal obtained was about 200-300μm.
Potable water was obtained after washing the ice crystals fixed bed by about the same volume of water. Hence if an ice counter washer is applied in this case, potable water of which salt concentration is less than 500 pap may be obtained with only a few per cent loss of potable water.View full abstractDownload PDF (5888K) -
Yoshinori NAGASHIMA, Shinichi MAEDA1979 Volume 32 Issue 6 Pages 310-313
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSThe contents of a horizontal crystallizer were agitated by the buoyancy force of refrigerant vapor at a sea water desalination pilot plant which employs the freezing method. The range of stable operation of the crystallizer was determined as the region where blocks of ice did not adhere to the walls. It was found that the temperature difference between the brine and the refrigerant had some effect on ice concentration in the crystallizer.
When the difference was extreme, the concentration had to be diluted, while, when the difference was minimal, the concentration had to be increased.
It was felt that the adhesive force of ice blocks to the crystallizer wall would increase when the temperature difference was extreme.View full abstractDownload PDF (3503K) -
Yoshinori NAGASHIMA, Takai YAMASAKI, Shinichi MAEDA1979 Volume 32 Issue 6 Pages 314-322
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSExperiments were carried out on wash water losses by using a model counter washer which was moved upwards mechanically. In an actual plant, it is difficult to obtain the rate of loss of wash water. In the model counter washer studied, brine was adopted as wash water, potable water was used as brine, and polyethylene particles were considered as ice particles.
Test results were compared with the calculated results of a simple model of wash water losses which was obtained from the difference between the flow rate of the wash water and that of the upflow entrained with particles, and it was found that both results coincided. Furthermore, data concerning wash water losses was obtained from other sources' and proved comparable with the authors' results.View full abstractDownload PDF (5674K) -
Studies on Ion Exchange Membrane (Part 29)Takatugu Azumi, Akio YONEDA1979 Volume 32 Issue 6 Pages 323-328
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSThe concentration of nickel chloride solution was studied by mean of the electrodiarysis method with ion exchange membranes. As the result, the effects of the current density for the concentration and volume of concentrated solution were similar to that of sea water. The values of current efficiency indicated about 90%.
In the concentration of the mixed solution of nickel and sodium chloride, it was recognized that nickel ion was more easily concentrated than sodium ion. The value of permselectivity coefficiency of nickel ion against sodium ion was 1.24.
On the other hand, in the desalination of mixed solution of nickel and sodium chloride it was recognized that nickel ion was more easily desalinated than sodium ion. The value of selectivity coefficiency of nickel ion against sodium ion in desalination indicated 1.42.View full abstractDownload PDF (3893K) -
Studies on the Extraction of Uranium from Sea Water by the Composite Adsorbent (Part 9)Hideo WADA, Takao KITAMURA, Ayako FUJII, Shunsaku KATOH, Kazuhiko SUGA ...1979 Volume 32 Issue 6 Pages 329-334
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSBoth before and after adsorption of uranium from sea water, the concentrations of various elements on titanium-activated carbon composite adsorbent were determined by spark source mass spectrometry. From the results, the behaviors of sea water constituents in uranium adsorption process were discussed. Adsorptivity of the adsorbent for sea water constituents was evaluated by concentration factors which were calculated from element concentrations in the adsorbent and sea water. The order of adsorptivity for sea water constituents was as follows:
alkali metals, halogens, sulphur<boron, alkaline earth metals <phosphor, arsenic<transition metals, uraniumView full abstractDownload PDF (4643K) -
Masayoshi MURAKAMI1979 Volume 32 Issue 6 Pages 335-348
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSDownload PDF (6975K)
- |<
- <
- 1
- >
- >|