| 摘要 |
PURPOSE:To prevent dry-up of underground natural resource and subsidence of ground by recirculating the underground water, whose heat is absorbed, into underground again by a method wherein a partitioning plate is provided at an intermediate part of both water flowing ports communicated with an underground aquifer and a water recirculating layer. CONSTITUTION:A deep well pump 7 pumps up the underground water from the underground aquifer 2 through a water introducing pipe 8 penetrating through the partitioning plate 6 and flows it into an evaporating condenser 11 communicated with the water introducing pipe 8. The underground water (hot-water), flowed from the water introducing pipe 8 into a flash evaporating chamber 13, flows from the upper stage to the lower stage sequentially under effecting flash evaporation from a nozzle 16 in the mode of cascade while the vapor, evaporated by the flash evaporation in respective compartments, releases the heat thereof and is condensed in respective compartments of a condensing chamber 14, in which moisture is removed, when passing through a venting port 15. Condensed water, reserved in the compartment 17 of the lowest stage of the flash evaporating chamber 13, is recirculated into a well pipe 1 through a returning pipe 31 and is returned to the water recirculating layer 3 by the head of water. On the other hand, the water, condensed by cooling and reserved in the compartment 19 of the lowest stage of the condensing chamber 14, is recirculated by the pump 32 into the well pipe 1 through a returning pipe 33 and is returned to the recirculating layer 3 by the head of water. |
