In order to set a steam ejector on the vacuum pan, we studied on critical compression ratio and entrainment ratio, under the operating steam pressure was 4-6Kg/cm²G, steam presaue in the suction side was 400mmHg-2Kg/cm²G and the throat area ratio was 3-12 about steam ejector.
From these results obtained, we found that the increase of critical compression ratio followed the increase of expansion ratio of nozzle and the decrease of steam pressur in the suction side, and then the entrai nment ratio showed opposite tendency to the crutical compression ratio.

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We performed the following examination in the sloping salt-field. 1.) Hardness of its construction and condition of its bed having been completed over, in case of various methods of its contruction and of various thickness of clay layer. 2.) Coefficient of yield, distribution of water temperature and concentration, and velocity, while the sea water or brine was poured down on the surface of bed, being scattered no sand on it.

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Using the Zeiss liquid interferometer,“the induction period” and the change of concentration of solution in time was measured under following conditions from the supersaturated Calcium sulphate solution which was made by mixing of Sodium,sulphate and Calcium choride solutions. Conditions of induction period measurements: 1) at room temperature and 100°C, 2) addition of crystal nucleus at room temperature, 3) addition of HCI, NaOH, Calgon and citric acid at 100°C Conditions of the change of concentration measurements: 1) at room temperature, 2) at 100°C.

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Since the accomplishment of Onahama salt manufacturing factory, out-vapour evaporating system becomes the centre of attention in evaporating industry, not to mention salt manutacturing industry. Specialy in later, it is claimed that the erection of 50,000 tons or 100,000 tons factory according to the cultivation of sources of electricitx, and now a few planning are performing.
Now, for steam-compressor_ the turbo-blower is used, but in the large scale plant we must consider the apply of axial compressor that is large volume flow, small scale, and high efficiency. Originally, the axial-compressor is studied and developed for jet engines, and so its chracteristics are small front surface and high efficiency. Recently it is introduced that A. R. Howell's literaure(England), and we had knowlege of the cascade theory, that compression ratio per one stage becomes larger by aking larger value of solidity; chord/pitch ratio, and efficiency becomes higher by adoption of 50% reftion in free vortex type. We are now testing the certification of this theory and the applying to steam by axial-compressor that applied this theory and is planted comparatively small volume flow, small compression ratio, therefore we give the outline of equipment, testing results, and anticipate the apply to the out-vapour evaporating equipment.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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