| 摘要 |
[Problem] To provide a geothermal heat exchanger and a geothermal power generation device with which steam can be obtained from high-temperature, high-pressure hot water extracted from underground without the adhesion of impurities to the device due to the steam that is used, thereby enabling a large-capacity and extremely efficient exchange of heat, and with which there is no adverse effect on the environment in the vicinity of the geothermal region. [Solution] A geothermal heat exchanger (1) has a pressurized water injection pipe (11), to which pressurized process water is supplied by a high-pressure water supply pump (17), and a hot water extraction pipe (12) which, with respect to the process water that descends to a geothermal region (10) through the pressurized water injection pipe (11), raises hot water produced by heat supplied from the geothermal region (10), in a state wherein the hot water does not include steam, with the hot water extracted from the hot water extraction pipe (12) being sent to a steam generator (21) and extracted as steam only within the steam generator (21). The pressurized water injection pipe (11) is arranged at the outer circumferential side of the hot water extraction pipe (12), and is constructed such that the hot water is transferred to the hot water extraction pipe (12) through inlet holes (15) provided in the lower portion of the pressurized water injection pipe (11). |
