Middle-deep strata non-interference rock thermal heating supply system gradient utilization system and monitoring system and method

Abstract

The invention discloses a middle-deep strata non-interference rock thermal heating supply system gradient utilization system. A double-working-medium relatively independent structure is adopted, and the gradient utilization system comprises a plate heat exchanger which is connected with a geothermal well central pipe. A ground source side outlet of the plate heat exchanger is connected with a high-temperature heat pump. An evaporator outlet of the high-temperature heat pump is connected with an evaporator inlet of a low-temperature heat pump and an inlet of a water mixing system. An evaporatoroutlet of the low-temperature heat pump and an outlet of the water mixing system are connected with a circulating pump system together, and the circulating pump system is back connected with a geothermal well via a water delivery pipeline. A heat exchange water outlet of the plate heat exchanger is connected with a condenser of the high-temperature heat pump and a condenser of the low-temperatureheat pump. A heated water outlet of the high-temperature heat pump and a heated water outlet of the low-temperature heat pump are connected with users, and return water used by the users is deliveredto a heat exchange water inlet of the plate heat exchanger. The invention further provides a monitoring system and method of the gradient utilization system. According to the middle-deep strata non-interference rock thermal heating supply system gradient utilization system and the monitoring system and method, utilization efficiency of energy sources is improved based on the gradient utilizationsystem, key points of a whole heating supply system can be monitored based on the monitoring system, and operating efficiency of the whole heating supply system can be controlled in a detailed mode.

Description

technical field [0001] The invention belongs to the technical field of rock thermal heating in middle and deep layers, and in particular relates to a cascade utilization and monitoring system and method for an uninterrupted rock thermal heating system in middle and deep layers. Background technique [0002] Middle-deep layers (within the range of 2,000 to 4,000 meters) have rich geothermal heat storage and great potential for development. The appearance of the coaxial buried tube downhole heat exchanger has improved the heat exchange efficiency of the formation. When the exploitation depth of the geothermal well reaches 2000 meters, the temperature at the bottom of the formation can reach above 50°C. If the single-stage ground source heat pump system is directly used, it is easy to cause energy waste. Contents of the invention [0003] In order to solve technical problems such as low actual operation efficiency, unclear visualization of energy utilization rate, and diffic...

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Problems solved by technology

[0003] In order to solve technical problems such as low actual operation efficiency, unclear visualization of energy utilization rate, and difficult detection of system faults in the medium-deep uninterrupted rock thermal heating system, the purpose of the present invention is to provide a medium-deep uninterrupted rock thermal heating system The cascade utilization and monitoring system and method, based on the cascade utilization system, improves the energy utilization efficiency, and monitors the key points of the entire heating system based on the monitoring system, so as to control the operating efficiency of the entire heating system in detail, and solve the problem of current heating system operation. Efficiency is not clear enough and system failures are not easy to find in time, so as to improve the utilization efficiency of geothermal energy and avoid energy waste

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