Multilevel deep well cooling and geothermal utilization system and process

A multi-level deep well cooling and geothermal utilization system, comprising a deep well heat recovery system (1), a shallow heat exchange system (2), and a high-temperature water lifting system (3), which are sequentially arranged in a deep well from bottom to top;

• wherein the deep well heat recovery system (1) is located at a deep level of the mine shaft and collects heat in the deep well, and comprises a heat absorption pipeline (5), a heat-conducting fluid downward delivery pipeline (6-1) connected to an inlet end of the heat absorption pipeline (5), and a heat-conducting fluid lifting pipeline (6-2) connected to an outlet end of the heat absorption pipeline (5);
• a water pump (9) is provided on the heat-conducting fluid lifting pipeline (6-2);
• the shallow heat exchange system (2) is located at a shallow level of the mine shaft, utilizes the heat collected by the deep well heat recovery system (1) to heat up water, and comprises a heat storage pool (10) and a heat dissipation pipeline (11) arranged inside the heat storage pool (10) for heating the heat storage pool (10), an inlet end of the heat dissipation pipeline (11) is connected to the heat-conducting fluid lifting pipeline (6-2), and the outlet end of the heat dissipation pipeline (11) is connected to the heat-conducting fluid downward delivery pipeline (6-1);
• the heat storage pool (10) is an enclosed space, and a water inflow pump (12-1) and a water inflow valve (13-1) are provided outside an water inlet end of the heat storage pool (10);
• the top and bottom of the high-temperature water lifting system (3) are connected to the ground surface (4) and the shallow heat exchange system (2) respectively, and the high-temperature water lifting system (3) is configured to lift the hot water heated in the shallow heat exchange system (2) to the ground surface (4), and comprises a water outflow valve (13-2) and a high-temperature water lifting pipeline (15) provided outside the heat storage pool (10), the water outflow valve (13-2) is connected with a water outflow pump (12-2) arranged outside the heat storage pool (10);
• the ground surface (4) is connected with a hot water utilization system.