阅读说明：本技术 一种地源热综合利用系统及供热方法 (Ground source heat comprehensive utilization system and heat supply method ) 是由 郝同法 于 2021-09-13 设计创作，主要内容包括：一种地源热综合利用系统,包括热泵机组、岩层换热系统、储热系统、矿井降温系统、控制系统。通过将热泵机组与岩层换热系统、储热系统和矿井降温系统连接,并进行温度和流量控制,能够更高效地、更合理地利用深层地热能,通过设置多种供/回水路径,既可以满足井下采矿作业需求,也可以满足井上用户的热水需求,本发明通过将热管嵌设在深层围岩内,将矿井围岩中的热能汲取出来,与热泵机组中的低温水进行换热,进而将低品位热能提升品质后供给不同的场所使用,整个过程耗电量较现有技术采用大功率风机送风,具有极大的产业价值和环保价值,此外,本发明通过控制系统控制各个子系统的温度和水流量,提高了深层矿井内作业人员的舒适度。(A ground source heat comprehensive utilization system comprises a heat pump unit, a rock stratum heat exchange system, a heat storage system, a mine cooling system and a control system. The heat pump unit is connected with the rock stratum heat exchange system, the heat storage system and the mine cooling system, temperature and flow control is carried out, deep geothermal energy can be efficiently and reasonably utilized, and various water supply/return paths are arranged, so that the requirements of underground mining operation and hot water requirements of aboveground users can be met.)

1. The utility model provides a ground source heat comprehensive utilization system, includes heat pump set, rock stratum heat transfer system, heat-retaining system, mine cooling system, control system, its characterized in that: the condensation unit and the heat consumer of heat pump set pass through the heat supply pipe network and are connected, the evaporation unit and the rock stratum heat transfer system of heat pump set are through first pipe-line system connection, rock stratum heat transfer system passes through the second pipe-line system and is connected with heat-retaining system, heat-retaining system passes through the third pipe-line system and is connected with the input of the evaporation unit of heat pump set, the output of the evaporation unit of heat pump set with the mine cooling system passes through the fourth pipe-line connection, control system respectively with heat pump set, rock stratum heat transfer system, heat-retaining system, mine cooling system circuit connection.

2. The ground source heat comprehensive utilization system according to claim 1, characterized in that: the output end of the condensing unit of the heat pump unit is connected with a heat user through a heat supply pipe network.

3. The ground source heat comprehensive utilization system according to any one of claims 1-2, characterized in that: the rock stratum heat exchange system comprises a first pipeline system, heat pipes, a heat exchange end and a circulating water pump arranged on the first pipeline system, wherein the first pipeline system is connected with an evaporation unit of a heat pump unit, the first pipeline system comprises a plurality of water supply pipelines and a plurality of water return pipelines, each water supply pipeline comprises a water supply main pipe and a water supply branch pipe, the plurality of water supply branch pipes are connected in parallel on the water supply main pipe, each water return pipeline comprises a water return main pipe and a water return branch pipe, the plurality of water return branch pipes are connected in parallel on the water supply main pipe, each water supply branch pipe is connected with the water return branch pipe through the heat exchange end, the heat pipes are inserted into a vertical shaft or a channel, and the joints of the heat pipes are sealed and fixed by adopting a sealant.

4. The ground source heat comprehensive utilization system according to any one of claims 1 to 3, characterized in that: the heat storage system comprises a heat insulation layer, an energy storage layer and a heat storage heat exchanger in sequence from outside to inside, the heat insulation layer comprises a heat insulation material, the energy storage layer is made of a phase change material, the second pipeline system is connected with an inlet of the heat storage heat exchanger, and an outlet of the heat storage heat exchanger is connected with an input end of an evaporation unit of the heat pump unit through the third pipeline system.

5. The ground source heat comprehensive utilization system according to any one of claims 1 to 4, characterized in that: the return water main pipe is connected with the second pipeline system through a first three-way valve, and the first three-way valve is electrically connected with the control system.

6. The ground source heat comprehensive utilization system according to any one of claims 1 to 5, characterized in that: the output and the mine cooling system of the evaporation unit of heat pump set are connected, the mine cooling system includes a unit type air supply barrel, a cooling heat exchanger, a cooling fan, the unit type air supply barrel is provided with an air suction inlet, a filtering and purifying unit, a cooling heat exchanger, a cooling fan and an air outlet in the air inlet direction in sequence, and the cooling heat exchanger is connected with a water supply branch pipe and a return water branch pipe.

7. The ground source heat comprehensive utilization system according to any one of claims 1 to 6, characterized in that: the pipeline that the cooling heat exchanger is connected with the water supply branch pipe is provided with a first flow control valve, the pipeline that the cooling heat exchanger is connected with the return water branch pipe is provided with a second flow control valve, and the first/second flow control valve is electrically connected with the control system.

8. The ground source heat comprehensive utilization system according to claim 7, characterized in that: a first temperature sensor and a first regulating valve are arranged at one end of a water return pipeline of the first pipeline system, the first temperature sensor is used for detecting the temperature of the rock stratum heat exchange water, a second temperature sensor is arranged in the heat storage heat exchanger, a second regulating valve is arranged on the third pipeline system, a third temperature sensor is arranged in the cooling heat exchanger, and the first temperature sensor, the second temperature sensor and the third temperature sensor are electrically connected with the control system.

9. The ground source heat comprehensive utilization system according to claim 8, characterized in that: the control system is connected with the touch screen type operation screen, and a first regulation preset temperature corresponding to a first regulation temperature, a second regulation preset temperature corresponding to a second regulation temperature and a third regulation preset temperature corresponding to a third regulation temperature are set through the touch screen type operation screen.

10. A heat supply method based on a ground source heat comprehensive utilization system, which is used for the ground source heat comprehensive utilization system as claimed in any one of claims 1 to 9, and is characterized in that:

step SS1, when the first adjusting temperature detected by the first temperature sensor is lower than the minimum value of a first adjusting preset temperature range, only controlling the first three-way valve to open a bypass pipeline of the first three-way valve, and enabling water in the return water branch pipe to flow into the heat storage heat exchanger through a second pipeline system to store heat;

step SS2, when the second adjusting temperature detected by the second temperature sensor is higher than the minimum value of the second adjusting preset temperature range, opening a second adjusting valve to enable water in the heat storage heat exchanger to enter a third pipeline system;

and a step SS3 of decreasing the opening degree of the first flow rate control valve and/or increasing the opening degree of the second flow rate control valve when the third regulation temperature detected by the third temperature sensor is lower than the minimum value of the third regulation preset temperature range.

Technical Field

The invention relates to the technical field of mining, in particular to a ground source heat comprehensive utilization system and a heat supply method.

Background

Along with the increase of the mining depth of metal mines in recent years, the surrounding rock temperature in the mines also gradually rises, the high temperature of the mines becomes one of the major problems of metal mine mining, the academic community generally considers that the ultimate depth of the metal mine in future not only depends on the level of mining machinery, but also depends on the cooling technology of the mines, the temperature of the surrounding rock in kilometer depth is increased by more than 35 ℃ compared with that of a surface constant temperature zone according to the average ground temperature gradient of 0.035 ℃/m in China, for example, when the temperature of the surface constant temperature zone is 15 ℃, the temperature of the surrounding rock in kilometer depth is more than 50 ℃, conceivably, 1000 meters under the wells can not normally work if no ventilation system of the mines is used for cooling.

The heat sources in deep mines mainly include: the method comprises the following steps of surrounding rock heat release, mine mining machinery heat dissipation, oxidation heat release, airflow self-compression and the like, wherein the surrounding rock heat release accounts for about 57%, the mine mining machinery heat dissipation accounts for about 15-20%, the oxidation heat release accounts for 12%, and the airflow self-compression accounts for about 9%, so that the influence of mine heat damage on the main surrounding rock heat release is shown, and two methods for eliminating the surrounding rock heat release are mainly adopted: when the deep well exploitation depth is not more than 1600mm, the requirement can be met by adopting a high-power ventilation system, when the deep well exploitation depth exceeds 1600m, a refrigeration system is required to be adopted for cooling, domestic mines are mostly cooled by adopting the ventilation system due to the exploitation depth and cost at present, however, the metal mining operation cycle is long, the high-power ventilation system works for a long time, the power consumption is extremely high, and when channels in deep mines are too much, the power consumption of the ventilation system far exceeds the power consumption of mining machinery of the mines, in addition, the temperature of deep surrounding rocks is higher, the direct discharge easily causes the temperature of the environment at the outlet of the mine pit to be too high, a local heat island effect is formed, and the waste of heat energy is easily caused.

Therefore, how to reduce the temperature of the surrounding rock in the deep mine to make the construction operators feel comfortable, and the reasonable utilization of the energy storage of the deep surrounding rock is realized while the mining energy consumption of the mine is reduced, which becomes a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

The invention aims to provide a ground source heat comprehensive utilization system and a heat supply method by comprehensively utilizing deep geothermal energy, so that the heat energy in a deep metal mine can be efficiently utilized, and energy conservation, emission reduction and environmental protection are realized.

A ground source heat comprehensive utilization system comprises a heat pump unit, a rock stratum heat exchange system, a heat storage system, a mine cooling system and a control system. The condensation unit and the heat user of the heat pump unit are connected through a heat supply pipe network, the evaporation unit of the heat pump unit is connected with the rock stratum heat exchange system through a first pipeline system, the rock stratum heat exchange system is connected with the heat storage system through a second pipeline system, the heat storage system is connected with the input end of the evaporation unit of the heat pump unit through a third pipeline system, the output end of the evaporation unit of the heat pump unit is connected with the mine cooling system through a fourth pipeline, the control system is respectively connected with the heat pump unit, the rock stratum heat exchange system, the heat storage system and the mine cooling system through circuits, and the control system can control the states of the heat pump unit, the rock stratum heat exchange system, the heat storage system and the mine cooling system.

The output end of the condensation unit of the heat pump unit is connected with a heat user through a heat supply pipe network (namely a municipal heat supply pipe network), and then the operation of the heat pump unit is controlled through a control system, so that the rock stratum heat storage collected by the rock stratum heat exchange system can be supplied to the heat user for heating or meeting the domestic hot water requirement.

The geological distribution of the metal mine in the vertical direction sequentially comprises a surface layer, a constant temperature layer and a mine surrounding rock layer, wherein the heat pump unit is arranged on the surface layer and used for converting low-grade geothermal energy into high-grade thermal energy and further transmitting the high-grade thermal energy to a heat supply pipe network for use by heat supply users; the stratum heat exchange system is arranged in a vertical shaft and a plurality of transverse channels, the vertical shaft is communicated with the transverse channels, and the stratum heat exchange system comprises a first pipeline system, a heat pipe, a hot end head and a circulating water pump arranged on the first pipeline system. The evaporation unit of the heat pump unit is connected with a first pipeline system, the first pipeline system comprises a plurality of water supply pipelines and a plurality of water return pipelines, each water supply pipeline comprises a water supply main pipe and a water supply branch pipe, the water supply branch pipes are connected in parallel on the water supply main pipe, each water return pipeline comprises a water return main pipe and a water return branch pipe, the water return branch pipes are connected in parallel on the water supply main pipe, each water supply branch pipe is connected with the water return branch pipe through a heat exchange end, the heat end is connected with a heat pipe, the heat pipe is inserted in a mine surrounding rock stratum, low-temperature water flowing through the heat exchange end exchanges heat with heat energy stored in the mine surrounding rock stratum, the temperature of the water after heat exchange is increased, and the water flows into the water return main pipe through the water return branch pipes.

Further, before a rock stratum heat exchange system is arranged and installed, surrounding rocks around the vertical shaft and the channel need to be punched through a tunnel punching machine or anchoring equipment, the hole diameter of the punched hole is the same as the outer diameter of the heat pipe, and the joint of the heat pipe and the vertical shaft or the channel is sealed and fixed by adopting a sealant so as to prevent the heat pipe from falling off.

The second pipeline system belongs to a bypass pipeline of a water return main pipe, a part of return water of the water return main pipe flows into the heat storage system through the second pipeline system to store heat, the heat storage system sequentially comprises a heat insulation layer, an energy storage layer and a heat storage heat exchanger from outside to inside, and the heat insulation layer comprises heat insulation materials to prevent heat stored by the heat storage system from diffusing into a surrounding rock stratum of a mine due to temperature difference; the heat pump unit comprises an energy storage layer, a heat pump unit and a heat pump unit, wherein the energy storage layer is made of a phase-change material, the heat storage layer is wrapped with a heat storage heat exchanger, a second pipeline system is connected with an inlet of the heat storage heat exchanger, an outlet of the heat storage heat exchanger is connected with an input end of an evaporation unit of the heat pump unit through a third pipeline system, and the heat storage heat exchanger is used for storing heat in heat exchange hot water into the energy storage layer so as to realize storage of redundant heat supply.

The return water main pipe is connected with the second pipeline system through a first three-way valve, and the first three-way valve is electrically connected with the control system.

The output end of the evaporation unit of the heat pump unit is connected with the mine cooling system, and the mine cooling system is used for cooling the deep metal mine to adjust the temperature inside the mine, so that the safety operation of workers is ensured, and the faint caused by heat release of deep surrounding rock is avoided.

The mine cooling system comprises a unit type air supply barrel, a cooling heat exchanger and a cooling fan, wherein the unit type air supply barrel is sequentially provided with an air suction opening, a filtering and purifying unit, the cooling heat exchanger, the cooling fan and an air outlet in the air inlet direction, the cooling heat exchanger is connected with a water supply branch pipe and a water return branch pipe, the mine cooling system can be arranged in a plurality of positions in the height direction of a vertical shaft or the length direction of a corridor, and then air supply is realized through layer upon layer pressurization, so that the heat load formed by heat release of surrounding rocks and heat dissipation of mine excavation machinery can be eliminated, and the oxygen outside the well can be sent into the well bottom, and further the operation comfort level in the deep underground is maintained.

The pipeline connecting the cooling heat exchanger and the water supply branch pipe is provided with a first flow control valve, the pipeline connecting the cooling heat exchanger and the water return branch pipe is provided with a second flow control valve, and the first/second flow control valve is electrically connected with a control system.

All be provided with temperature sensor in rock stratum heat transfer system, heat-retaining system, the mine cooling system for detect the income/play water temperature of every subsystem of ground source heat integrated utilization system, furtherly, the return water pipeline one end of the first pipe-line system of rock stratum heat transfer system is provided with first temperature sensor and first governing valve, first temperature sensor is used for detecting the rock stratum and trades hydrothermal temperature, is provided with second temperature sensor in the heat-retaining heat exchanger of heat-retaining system, is provided with the second governing valve on the third pipe-line system that the heat-retaining heat exchanger is connected, and second temperature sensor is used for detecting the temperature of hot water, be provided with third temperature sensor in the cooling heat exchanger of mine cooling system, be used for detecting the temperature of the refrigerated water that heat pump set supplied to mine cooling system. The first temperature sensor, the second temperature sensor and the third temperature sensor are electrically connected with a control system, the control system adjusts the opening degree of a first adjusting valve according to a first adjusting temperature detected by the first temperature sensor, the control system adjusts the opening degree of a second adjusting valve according to a second adjusting temperature detected by the second temperature sensor, and the control system controls the opening degree of a first flow control valve and/or a second flow control valve according to the third temperature sensor.

The control system is connected with the touch screen type operation screen, and a technician can set a first regulation preset temperature corresponding to the first regulation temperature, a second regulation preset temperature corresponding to the second regulation temperature and a third regulation preset temperature corresponding to the third regulation temperature through the touch screen type operation screen.

Based on the ground source heat comprehensive utilization system, the invention also comprises the following control method:

step SS1, when the first adjusting temperature detected by the first temperature sensor is lower than the minimum value of a first adjusting preset temperature range, only controlling the first three-way valve to open a bypass pipeline of the first three-way valve, and enabling water in the return water branch pipe to flow into the heat storage heat exchanger through a second pipeline system to store heat;

step SS2, when the second adjusting temperature detected by the second temperature sensor is higher than the minimum value of the second adjusting preset temperature range, the second adjusting valve is opened, so that the water in the heat storage heat exchanger 13 enters a third pipeline system;

and a step SS3 of decreasing the opening degree of the first flow rate control valve and/or increasing the opening degree of the second flow rate control valve when the third regulation temperature detected by the third temperature sensor is lower than the minimum value of the third regulation preset temperature range.

Preferably, in the present invention, based on the above control method, the control method further includes:

step SS4, when the first adjusting temperature detected by the first temperature sensor is within a first adjusting preset temperature range, only controlling a straight pipeline of the first three-way valve to be opened, enabling water in the water return branch pipe to return to the heat pump unit through a first pipeline system, and reducing the opening degree of the first adjusting valve;

step SS5, when the first adjusting temperature detected by the first temperature sensor is within a first adjusting preset temperature range, controlling the bypass pipeline and the straight pipeline of the first three-way valve to be opened;

step SS6, on the basis of step SS5, when the second adjusting temperature detected by the second temperature sensor is higher than the minimum value of the second adjusting preset temperature range, the second adjusting valve is opened, so that the water in the heat storage heat exchanger enters a third pipeline system;

step SS7, on the basis of step SS5, when the second adjusting temperature detected by the second temperature sensor is lower than the minimum value of a second adjusting preset temperature range, the second adjusting valve is closed, and the water in the heat storage heat exchanger is enabled to store heat;

step SS8, on the basis of step SS6 or step SS7, decreasing the opening degree of the first flow control valve and/or increasing the opening degree of the second flow control valve when the third regulation temperature detected by the third temperature sensor is lower than the minimum value of the third regulation preset temperature range;

and a step SS9 of increasing the opening degree of the first flow rate control valve and/or decreasing the opening degree of the second flow rate control valve when the third regulation temperature detected by the third temperature sensor is higher than the maximum value of the third regulation preset temperature range on the basis of the step SS6 or the step SS 7.

In summary, the beneficial technical effects of the invention are as follows:

1) according to the system, the heat pump unit is connected with the rock stratum heat exchange system, the heat storage system and the mine cooling system, the temperature and flow control is carried out through the control system, deep geothermal energy (surrounding rock heat storage) can be more efficiently and reasonably utilized, and various water supply/return paths are arranged, so that the underground mining operation requirement can be met, and the hot water requirement of an aboveground user can also be met;

2) the invention can reduce the heat release of the surrounding rock of the mine to a greater extent, reduce the heat dissipation of the mining machinery of the mine and keep the comfort level of the operating personnel in the deep mine;

3) according to the invention, the redundant heat energy is stored by the heat storage system, so that the energy utilization can be realized to the greatest extent, and the energy waste is reduced to the greatest extent. The comprehensive utilization system adopts a heat pipe embedding technology to extract heat energy in the surrounding rock of the mine and exchange heat with low-temperature water in a heat pump unit, so that the low-grade heat energy is supplied to different places for use after the quality is improved, and compared with the prior art, the power consumption in the whole process is supplied by adopting a high-power fan, so that the comprehensive utilization system has great industrial value and environmental protection value;

4) compared with the single geothermal energy collecting mode of the existing system, the system provided by the invention has the advantages that the control system can adjust the opening degree of the first regulating valve according to the first regulating temperature detected by the first temperature sensor, the control system adjusts the opening degree of the second regulating valve according to the second regulating temperature detected by the second temperature sensor, and the control system controls the opening degree of the first flow control valve and/or the second flow control valve according to the third temperature sensor, so that water in the ground source heat comprehensive utilization system can meet different production and living requirements, and meanwhile, the comfort level of operators in a deep mine is improved.

Drawings

Fig. 1 is a schematic view of a ground source heat comprehensive utilization system according to an embodiment of the present invention;

fig. 2 is a schematic elevation view of a ground source heat comprehensive utilization system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a formation heat exchange system according to the present invention;

fig. 4 is a schematic elevation view of a ground source heat comprehensive utilization system according to another embodiment of the present invention;

in the figure, 1-a heat pump unit, 2-a vertical shaft, 3-a channel, 4-a heat pipe, 5-a heat exchange end, 6-a mine cooling system, 7-a water supply pipeline, 8-a water return pipeline, 9-a circulating water pump, 10-a second pipeline system, 11-a heat insulation layer, 12-an energy storage layer, 13-a heat storage heat exchanger, 14-a ground surface layer, 15-a constant temperature layer and 16-a mine surrounding rock layer;

6-1-unit type air supply cylinder, 6-2-cooling heat exchanger and 6-3-cooling fan;

7-1-a water supply main pipe and 7-2-a water supply branch pipe;

8-1-backwater main pipe, 8-2-backwater branch pipe;

Detailed Description

In order to make the technical solution of the present invention more clearly understood, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings.

Example 1

Examining fig. 1, a ground source heat comprehensive utilization system includes a heat pump unit, a rock stratum heat exchange system, a heat storage system, a mine cooling system, a control system and a heat consumer. The evaporation unit of the heat pump unit is connected with the rock stratum heat exchange system through a first pipeline system, the rock stratum heat exchange system is connected with the heat storage system through a second pipeline system, the heat storage system is connected with the input end of the evaporation unit of the heat pump unit through a third pipeline system, the output end of the evaporation unit of the heat pump unit is further connected with the mine cooling system through a fourth pipeline, the control system is respectively connected with the heat pump unit, the rock stratum heat exchange system, the heat storage system and the mine cooling system through circuits, and the states of the heat pump unit, the rock stratum heat exchange system, the heat storage system and the mine cooling system can be controlled through the control system.

The output end of the condensation unit of the heat pump unit is connected with a heat user through a heat supply pipe network, and then the operation of the heat pump unit is controlled through the control system, so that the rock stratum heat storage (geothermal energy) collected by the rock stratum heat exchange system can be supplied to the heat user for heating or the domestic household hot water requirement can be met.

It should be emphasized that in this embodiment, the third pipeline system is a one-way flow system, i.e. the third pipeline system is composed of the water return pipeline entirely.

Considering fig. 2-3, the geological distribution of the metal mine in the vertical direction is sequentially a surface layer 14, a constant temperature layer 15 and a mine surrounding rock layer 16, the heat pump unit 1 is arranged on the surface layer 14, and the heat pump unit 1 is used for converting low-grade geothermal energy into high-grade thermal energy and then transmitting the high-grade thermal energy to a heat supply pipe network for use by heat supply users; the rock stratum heat exchange system is arranged in a vertical shaft 2 and a plurality of transverse channels 3, the vertical shaft 2 is communicated with the plurality of transverse channels 3, the vertical shaft 2 and the channels 3 are metal mining operation type operation galleries, and the rock stratum heat exchange system comprises a first pipeline system, a heat pipe 4, a hot end 5 and a circulating water pump 9 arranged on the first pipeline system. An evaporation unit of the heat pump unit 1 is connected with a first pipeline system, the first pipeline system comprises a plurality of water supply pipelines 7 and a plurality of water return pipelines 8, each water supply pipeline 7 comprises a water supply main pipe 7-1 and a water supply branch pipe 7-2, the plurality of water supply branch pipes 7-2 are connected on the water supply main pipe 7-1 in parallel, similarly, each water return pipeline 8 comprises a water return main pipe 8-1 and a water return branch pipe 8-2, the plurality of water return branch pipes 8-2 are connected on the water supply main pipe 8-1 in parallel, each water supply branch pipe 7-2 is connected with the water return branch pipe 8-2 through a heat exchange end 5, the heat end 5 is connected with a heat pipe 4, the heat pipe 4 is inserted into a mine surrounding rock stratum 16, the heat pipe 4 is equivalent to a heat exchange medium, low-temperature water flowing through the heat exchange end 5 exchanges heat with heat energy stored in the mine surrounding rock stratum 16, and the temperature of the heat exchanged rises, flows into the backwater main pipe 8-1 through the backwater branch pipe 8-2.

Further, because the heat pipe 4 cannot be directly inserted into the rock stratum, before the rock stratum heat exchange system is arranged and installed, the surrounding rocks around the vertical shaft 2 and the channel 3 need to be punched through a tunnel punching machine or an anchoring device, the hole diameter of the punched hole is the same as the outer diameter of the heat pipe 4, and the joint of the heat pipe 4 and the vertical shaft 2 or the channel 3 is sealed and fixed by adopting a sealant so as to prevent the heat pipe 4 from falling.

The second pipeline system 10 belongs to a bypass pipeline of a water return main pipe 8-1, a part of return water of the water return main pipe 8-1 flows into a heat storage system through the second pipeline system 10 to store heat, further considering fig. 2, the heat storage system sequentially comprises a heat insulation layer 11, an energy storage layer 12 and a heat storage heat exchanger 13 from outside to inside, the heat insulation layer 11 comprises heat insulation materials, and heat stored by the heat storage system is prevented from being diffused into a mine surrounding rock layer 16 due to temperature difference; the energy storage layer 12 is made of a phase-change material, the heat storage heat exchanger 13 is wrapped inside the energy storage layer 12, the second pipeline system 10 is connected with an inlet of the heat storage heat exchanger 13, an outlet of the heat storage heat exchanger 13 is connected with an input end of an evaporation unit of the heat pump unit 1 through a third pipeline system, and the heat storage heat exchanger 13 is used for storing heat in heat exchange hot water into the energy storage layer 12 so as to realize storage of redundant heat supply.

The water return main pipe 8-1 is connected with the second pipeline system 10 through a first three-way valve, the first three-way valve specifically adopts an electric three-way valve or an electromagnetic valve, and the first three-way valve is electrically connected with a control system.

In order to save labor cost and avoid waste of resources and energy, the heat storage system can use a natural tunnel, such as a waste metal mine pit, for example, copper mine, lead mine, tungsten mine and the like, the inner wall surface of the natural tunnel is hardened by cement materials to form a cement covering layer, an insulating layer 11 is arranged in the cement covering layer, and then the insulating layer 11 can be protected by the cement covering layer.

Further reviewing fig. 3, the output end of the evaporation unit of the heat pump unit 1 is connected with the mine cooling system 6, the deep metal mine is cooled through the mine cooling system 6, the temperature inside the mine is adjusted, the safety operation of workers is further ensured, and syncope caused by heat release of deep surrounding rocks is avoided.

The mine cooling system 6 comprises a unit type air supply barrel 6-1, a cooling heat exchanger 6-2 and a cooling fan 6-3, wherein the unit type air supply barrel 6-1 is sequentially provided with an air suction inlet, a filtering and purifying unit (not shown in the figure), the cooling heat exchanger 6-2, the cooling fan 6-3 and an air outlet in the air inlet direction, the cooling heat exchanger 6-2 is connected with a water supply branch pipe 7-2 and a water return branch pipe 8-2, the mine cooling system 6 can be arranged in a plurality along the height direction of a vertical shaft 2 or the length direction of a corridor 3, and air is supplied by pressurizing layer by layer to form an air path penetrating through the outside and the bottom of a well, so that workers can feel cool air comfortably at different operating depths in a metal mine, and the air supply of the mine cooling system 6 can offset heat release of surrounding rocks and heat loads formed by heat dissipation of mining machinery, and oxygen outside the well can be sent to the bottom of the well, so that the operation comfort degree of the deep underground well is maintained.

A first flow control valve is arranged on a pipeline connecting the cooling heat exchanger 6-2 and the water supply branch pipe 7-2, a second flow control valve is arranged on a pipeline connecting the cooling heat exchanger 6-2 and the water return branch pipe 8-2, the first flow control valve and the second flow control valve can adopt an electric two-way valve or an electric three-way valve, and the first/second flow control valve is electrically connected with a control system.

A rock stratum heat exchange system and a heat storage system, the mine cooling system is internally provided with temperature sensors for detecting the water inlet/outlet temperature of each subsystem of the ground source heat comprehensive utilization system, furthermore, one end (namely the input end connected with the evaporation unit) of a water return pipeline 8 of a first pipeline system of the rock stratum heat exchange system is provided with a first temperature sensor and a first regulating valve, the first temperature sensor is used for detecting the temperature of rock stratum heat exchange water, a second temperature sensor is arranged in a heat storage heat exchanger 13 of the heat storage system, a second regulating valve is arranged on a third pipeline system connected with the heat storage heat exchanger 13, the second temperature sensor is used for detecting the temperature of the heat storage water, and a third temperature sensor is arranged in a cooling heat exchanger 6-2 of the mine cooling system and used for detecting the temperature of chilled water supplied to the mine cooling system by the heat pump unit 1. The first/second/third temperature sensor is electrically connected with the control system, the control system adjusts the opening degree of the first adjusting valve according to the first adjusting temperature detected by the first temperature sensor, the control system adjusts the opening degree of the second adjusting valve according to the second adjusting temperature detected by the second temperature sensor, and the control system controls the opening degree of the first flow control valve and/or the second flow control valve according to the third temperature sensor.

Example 2

The control system is connected with the touch screen type operation screen, and a technician can set a first regulation preset temperature corresponding to the first regulation temperature, a second regulation preset temperature corresponding to the second regulation temperature and a third regulation preset temperature corresponding to the third regulation temperature through the touch screen type operation screen.

The first adjustment preset temperature range is 40-50 degrees, the second adjustment preset temperature range is 40-45 degrees, and the third adjustment preset temperature range is 5-13 degrees.

The ground source heat comprehensive utilization system based on the embodiment 1 further includes the following control method:

step SS1, when the first adjusting temperature detected by the first temperature sensor is lower than the minimum value of the first adjusting preset temperature range, only controlling the first three-way valve to open the bypass pipeline of the first three-way valve, and enabling water in the return water branch pipe 8-2 to flow into the heat storage heat exchanger 13 through the second pipeline system 10 to store heat;

step SS2, when the second adjusting temperature detected by the second temperature sensor is higher than the minimum value of the second adjusting preset temperature range, the second adjusting valve is opened, so that the water in the heat storage heat exchanger 13 enters a third pipeline system;

and step SS3, decreasing the opening degree of the first flow rate control valve and/or increasing the opening degree of the second flow rate control valve when the third regulation temperature detected by the third temperature sensor is lower than the minimum value of the third regulation preset temperature range.

Example 3

The ground source heat comprehensive utilization system according to embodiment 2 further includes the following control method:

step SS4, when the first adjusting temperature detected by the first temperature sensor is within the first adjusting preset temperature range, only controlling the opening of a straight pipeline of the first three-way valve to enable water in the water return branch pipe 8-2 to return to the heat pump unit 1 through the first pipeline system, and reducing the opening degree of the first adjusting valve;

step SS5, when the first adjusting temperature detected by the first temperature sensor is within the first adjusting preset temperature range, controlling the bypass pipeline and the straight pipeline of the first three-way valve to be opened;

step SS6, on the basis of step SS5, when the second adjusting temperature detected by the second temperature sensor is higher than the minimum value of the second adjusting preset temperature range, the second adjusting valve is opened, so that the water in the heat storage heat exchanger 13 enters a third pipeline system;

step SS7, on the basis of step SS5, when the second adjustment temperature detected by the second temperature sensor is lower than the minimum value of the second adjustment preset temperature range, the second adjustment valve is closed, and the water in the heat storage heat exchanger 13 is subjected to heat storage;

a step SS8 of decreasing the opening degree of the first flow control valve and/or increasing the opening degree of the second flow control valve when the third regulation temperature detected by the third temperature sensor is lower than the minimum value of the third regulation preset temperature range on the basis of the step SS6 or the step SS 7;

and a step SS9 of increasing the opening degree of the first flow control valve and/or decreasing the opening degree of the second flow control valve when the third regulation temperature detected by the third temperature sensor is higher than the maximum value of the third regulation preset temperature range on the basis of the step SS6 or the step SS 7.

In conclusion, the control system adjusts the opening degree of the first adjusting valve according to the first adjusting temperature detected by the first temperature sensor, adjusts the opening degree of the second adjusting valve according to the second adjusting temperature detected by the second temperature sensor, and controls the opening degree of the first flow control valve and/or the second flow control valve according to the third temperature sensor, so that water in the ground source heat comprehensive utilization system can meet different production and living requirements, heat storage energy in a rock stratum is utilized to the maximum degree, energy waste is avoided, and the comfort level of personnel in a deep mine is improved.

Example 4

Considering fig. 4, the structure of the ground source heat comprehensive utilization system in embodiment 4 is basically the same as that of the ground source heat comprehensive utilization system in embodiment 1, except that the arrangement form of the third pipeline system is different, in this embodiment, the third pipeline system is a bidirectional flow system, that is, the third pipeline system includes both a water return pipeline and a water supply pipeline, and meanwhile, the arrangement form of the second pipeline system may include both a water return pipeline and a water supply pipeline. The purpose of the arrangement is to enable the heat storage system to form an independent system, after the shaft and the shaft are filled and sealed, the second pipeline system can be connected to other industrial waste/waste heat production systems, and further, other forms of industrial waste/waste heat are stored, so that the natural tunnel is utilized to the maximum.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.