| Title | The Study and Benefit Analysis on the Way of Anticorrosion/Scaling of the Geothermal Water of a Medium or Low Temperature |
|---|---|
| Authors | Jing-yu Chang; Xiao-ti Jiang |
| Year | 1990 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Brine Technology; Production; Direct Use; China; Tianjin; Calcium Carbonate; Chemistry; Corrosion; Scaling; Inhibition; Agriculture; Aquaculture; Drying; Green House; Space Heating; Low Temperature; Moderate Temperature; Magnetic Antiscaling Process |
| Abstract | This paper reports the research result of a national key project. The geothermal water is a water resources with relatively high temperature and hence with very high utilization value. But its high salinity and complicated composition cause corrosion and scaling in the utilization system to a varying extent, that obstructs exploitation and utilization of the geothermal resource. This paper expounds the character of the geothermal water, analyses the mechanism of corrosion and scaling, and describes the experimental research carried out for prevention of corrosion and scaling caused by the geothermal water of a medium or low temperature. The experimental results show that with an anticorrosion/scaling water treatment procedure the geothermal water can be directly introduced into the utilization system for a very high utilization rate of the geothermal energy. The average corrosion rate of carbon steel by the treated geothermal water is only 0.02 mm/a compared with 0.78 mm/a by the untreated water. No scaling is found in the system. The treatment procedure is simple. Neither environmental pollution nor heat loss is caused. The cost of the treatment is lower than that for the city tap water. This treatment method is proven to be effective on eliminating both corrosion and scaling resulted from the geothermal water. |