成果報告書詳細
管理番号20140000000377
タイトル*平成25年度中間年報 地熱発電技術研究開発 地熱発電の導入拡大に資する革新的技術開発 低温域の地熱資源有効活用のためのスケール除去技術の開発
公開日2014/6/13
報告書年度2013 - 2013
委託先名株式会社超電導機構 国立大学法人大阪大学 独立行政法人産業技術総合研究所
プロジェクト番号P13009
部署名新エネルギー部
和文要約
英文要約FY2013 annual interim report Development of Geothermal Power Generation Technology
The innovative technology development for expanding introduction of geothermal power generation,
Development of removing scale technology
for utilizing geothermal resources with low temperature effectively
1.Development content and its results
This separator can remove scale which contains Silica and Calcium Carbonate
from 30 ton per hour spring water,and reduce from 150ppm to 200ppm as non-crystal Silica.
Its development can make it possible to treat scaling fast and economically without changing the constituent part of spring water except Silica.
Also this can accelerate to realize the spring power generation and go up the economical effect
1)Market research
We conducted the field surveys in two districts of Hokkaido, Kyusyu region, and Tohoku region.
The standard market price of a apparatus should be less than 10 million yen based on the survey result, because Teshikaga town Hokkaido estimated 10 million yen as expenditure of silica scaling.
Also some users do not only the binary cycle generating, but also hothouse business by utilizing hot spring. Such waste heat utilization will be able to go up profitability of a apparatus.
2)Concept to design the apparatus for magnetic separation of Silica from hot ground water and Preparation of model apparatus
 We designed the system to separate silica from hot spring water using magnetic force control and prepared the model apparatus where permanent magnet is used.
3)Magnetic separation system design
We presented the guideline to perform magnetic separation of silica-containing magnetic flock from hot spring water. Using the guideline, we will squeeze the most appropriate filter diameter, magnetic force, and temperature and move ahead to the confirmation study under the practical conditions. We will further continue the study and design 1)the magnetic separation system which enables mass treatment of hot spring water at low cost and 2)the compact size hot-spring binary equipment for practical use.
4)Analyses of some scale samples
We analyzed some hot water and scale samples collected at Kyusyu Obama hot spring, Nagasaki prefecture, and found that different minerals were precipitated according to the position. Calcium carbonate is the major precipitating mineral between hot spring well to hotwater storage tank,while Mg-bearing hydrous silicate mineral is the major precipitating mineral after the storage tank.
5) Establishment of business plan
Its running cost can be estimated to 8,830,000 yen per year,
assumed that the cost of Ferrous Chloride is the same as of Ferric Polysulfate, and the same amount of additive is used.
However for securing profitability, it is necessary to reduce the running cost by 21.9% due to reducing amount of additive or its cost.
In spite of saving Ferrous Chloride, it will be possible to reduce additive and to produce enough magnetization, because Ferrous Chloride has more iron ion than that of Ferric Polysulfate.
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