Goaf heat energy storage experimental device for simulating multi-layer geologic structure

Abstract

The utility model relates to the technical field of energy storage and geology, and particularly discloses a goaf heat energy storage experiment device simulating a multilayer geologic structure, which comprises a mounting box body, a heat preservation layer fixedly connected to one side of the inner wall of the mounting box body, a first stratum fixedly connected to the bottom of the inner wall of the heat preservation layer, and a second stratum fixedly connected to the bottom of the inner wall of the mounting box body. The top of the first stratum is fixedly connected with a second stratum, the top of the second stratum is fixedly connected with a third stratum, and the top of the third stratum is fixedly connected with a fourth stratum; through the arrangement of the mounting box body, the first stratum, the goaf and the simulation box, during use, the first stratum, the second stratum, the third stratum and the fourth stratum are arranged in the mounting box body, the goaf is arranged in the first stratum, and heat storage in the goaf is simulated through the simulation box; the purpose of introducing specific geologic structure parameters of the goaf is achieved by simulating the distribution conditions of an actual stratum and the goaf, and therefore the pertinence and practicability of the model are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the energy storage and geological technical field, concretely relates to a kind of goaf thermal energy storage experimental device of simulated multilayer geological structure. BACKGROUND

[0002] With the rapid development of renewable energy, its intermittency and instability put forward higher requirements to energy storage technology, and thermal energy storage, as an important part of it, is of great significance to realize efficient use and balance supply and demand of energy. As the left space after mining activities, underground goaf has significant potential for storing thermal energy. These areas usually have large space capacity and can provide sufficient storage space. At the same time, its good sealing helps to reduce thermal energy loss and improve storage efficiency.

[0003] However, most of the current thermal storage models are mainly concentrated on the ground or shallow underground, and the research on the thermal storage characteristics and efficiency of deep goaf is relatively scarce. In actual geological environment, underground goaf is often in complex multilayer geological structure, and these strata have different thermal physical parameters and spatial geometric characteristics, which have important influence on thermal energy storage process. In order to accurately simulate the thermal energy storage process of goaf, the complexity of multilayer geological structure needs to be considered, so the staff needs to improve it. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of goaf thermal energy storage experimental device of simulated multilayer geological structure to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A kind of goaf thermal energy storage experimental device of simulated multilayer geological structure, comprising:

[0007] mounting box;

[0008] The inner wall of the mounting box is fixedly connected with a heat preservation layer on one side, the bottom of the inner wall of the heat preservation layer is fixedly connected with a first stratum, the top of the first stratum is fixedly connected with a second stratum, the top of the second stratum is fixedly connected with a third stratum, and the top of the third stratum is fixedly connected with a fourth stratum;

[0009] The middle part of the inner wall of the first stratum is provided with a goaf, the inner wall of the goaf is fixedly connected with a simulation box, a plurality of exhaust holes are formed in the top of the simulation box, a water inlet pipe is inserted into one side of the inner wall of the simulation box, and the surface of the water inlet pipe penetrates and is inserted into the inner walls of the second stratum, the third stratum and the fourth stratum, and a drain pipe is inserted into the other side of the inner wall of the simulation box, and the surface of the drain pipe penetrates and is inserted into the inner walls of the second stratum, the third stratum and the fourth stratum.

[0010] Preferably, one side of the surface of the installation box body is fixedly connected with a first support frame, and the top of the first support frame is overlapped with a water injection tank.

[0011] Preferably, the bottom of the back surface of the water injection tank is fixedly connected with a water injection pipe, and one side of the surface of the water injection pipe is inserted into the top end of the water inlet pipe.

[0012] Preferably, one side of the inner wall of the simulation tank is fixedly connected with a water pump, the output end of the water pump is provided with a discharge pipe, and the front end of the discharge pipe penetrates and is inserted into the inner wall of the drain pipe.

[0013] Preferably, one side of the back surface of the installation box body is fixedly connected with a second support frame, the top of the second support frame is overlapped with a water collecting tank, the front end of the drain pipe is inserted into the inner wall of the water collecting tank, and the bottom of the back surface of the water collecting tank is fixedly connected with a waste water pipe.

[0014] Preferably, the top of one side of the installation box body is fixedly connected with a third support frame, one side of the top of the third support frame is fixedly connected with a temperature control tank, and the two sides of the temperature control tank are electrically connected with temperature measuring resistors, and the surface of the temperature measuring resistors is inserted into the inner wall of the first stratum, the second stratum, the third stratum, the fourth stratum and the simulation tank.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] (1) Through the setting of the installation box body, the heat preservation layer, the first stratum, the second stratum, the third stratum, the fourth stratum, the goaf, the simulation tank, the air vent, the water inlet pipe and the drain pipe, when in use, the heat preservation layer is used for heat preservation of the stratum inside the box body, the goaf is arranged in the first stratum, the goaf is simulated to store heat by the simulation tank, the water inlet pipe and the drain pipe are inserted into the goaf, the water inlet pipe is arranged in a group and has a size of 0.03 m, the drain pipe can be arranged in a group and has a size of 0.03 m, the water pump connected with the drain pipe is an adjustable flow water pump, when measuring temperature, the water sample under different flow rates can be tested by adjusting the flow rate of the water pump, because the water injection temperature is too high, therefore, the top of the goaf simulation tank is provided with the air vent (simulating the pore and fissure of the actual stratum), so that the purpose of simulating the actual geological structure parameters of the goaf is achieved, and the pertinence and practicality of the model are improved.

[0017] (2) Through the setting of the third support frame, the temperature control tank and the temperature measuring resistor, when in use, the temperature measuring resistor is arranged in a total of 8 groups for temperature measurement, six groups of temperature measurement are carried out for the simulation of the rock stratum, two groups of temperature measurement are carried out for the accumulated water in the simulation tank, two groups of temperature measurement are arranged for the first stratum, the second stratum and the third stratum respectively, the fourth stratum is too shallow, so that the temperature measurement is not arranged in the experiment, and the pumping temperature is tested, so that the model is verified by combining the experimental data, and the effectiveness of the model in the actual application is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the utility model;

[0019] Figure 2 is a perspective view of the utility model;

[0020] Figure 3 is a plan view of the goaf of the utility model;

[0021] Figure 4 is a sectional plan view of the utility model;

[0022] Figure 5 is a plan view of the heat preservation layer and the exhaust setting of the simulation box of the utility model;

[0023] In the figure: 1, installation box; 2, heat preservation layer; 3, first stratum; 4, second stratum; 5, third stratum; 6, fourth stratum; 7, goaf; 8, simulation box; 9, exhaust hole; 10, water inlet pipe; 11, drain pipe; 12, first support frame; 13, water injection tank; 14, water injection pipe; 15, water pump; 16, discharge pipe; 17, second support frame; 18, water collecting tank; 19, waste water pipe; 20, third support frame; 21, temperature control box; 22, temperature measuring resistance. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Embodiment one:

[0026] Please refer to Figures 1 to 5 Fig. 1, a goaf thermal energy storage experimental device for simulating multi-layer geological structure, comprising:

[0027] installation box 1;

[0028] The inner wall of the installation box 1 is fixedly connected with a heat preservation layer 2, the bottom of the inner wall of the heat preservation layer 2 is fixedly connected with a first stratum 3, the top of the first stratum 3 is fixedly connected with a second stratum 4, the top of the second stratum 4 is fixedly connected with a third stratum 5, the top of the third stratum 5 is fixedly connected with a fourth stratum 6, the first stratum 3 is a Shitouhezi group rock stratum, the composition is mainly conglomerate, sandy conglomerate, coarse conglomerate and sandstone, the second stratum 4 is a Shitoumiaozicong group rock stratum, the composition is mainly medium and coarse sandstone, conglomerate and sandy conglomerate, the third stratum 5 is a Cretaceous lower Dongshan group rock stratum, the soil quality is mainly breccia, tuff, agglomerate and the like, and the fourth stratum 6 is a Cenozoic quaternary stratum, the soil quality is black humus soil and yellowish brown clay;

[0029] A goaf 7 is formed in the middle of the inner wall of the first stratum 3, the goaf 7 simulates heat storage through a simulation box 8, the inner wall of the goaf 7 is fixedly connected with the simulation box 8, a plurality of exhaust holes 9 are formed in the top of the simulation box 8, the exhaust holes 9 are arranged on the top of the simulation box 8 due to the high temperature of the water injection, a water inlet pipe 10 is inserted into one side of the inner wall of the simulation box 8, and the surface of the water inlet pipe 10 is inserted into the inner walls of the second stratum 4, the third stratum 5 and the fourth stratum 6, a water outlet pipe 11 is inserted into the other side of the inner wall of the simulation box 8, and the surface of the water outlet pipe 11 is inserted into the inner walls of the second stratum 4, the third stratum 5 and the fourth stratum 6, wherein the water inlet pipe 10 is arranged in one group and has a size of 0.03 m, the water outlet pipe 11 can be arranged in one group and has a size of 0.03 m, the water outlet pipe is connected with a water pump with adjustable flow, when temperature is measured, the water pump can be used to adjust the water outlet flow, and the temperature of the water sample under different water outlet flows is tested.

[0030] Embodiment two:

[0031] Please refer to Figures 1 to 5 As shown in the figure, one side of the surface of the installation box 1 is fixedly connected with a first support frame 12, the top of the first support frame 12 is overlapped with a water injection tank 13, the bottom of the back of the water injection tank 13 is fixedly connected with a water injection pipe 14, one side of the surface of the water injection pipe 14 is inserted into the top end of the water inlet pipe 10, the back of the water injection tank 13 injects water into the inside of the water inlet pipe 10 through the water injection pipe 14, so that the simulation box 8 inside the goaf 7 stores water, one side of the inner wall of the simulation box 8 is fixedly connected with a water pump 15, the output end of the water pump 15 is installed with a discharge pipe 16, the output end of the water pump 15 discharges the water inside the simulation box 8 through the discharge pipe 16, and the front end of the discharge pipe 16 is inserted into the inner wall of the water outlet pipe 11, one side of the back of the installation box 1 is fixedly connected with a second support frame 17, the top of the second support frame 17 is overlapped with a water collecting tank 18, the water collecting tank 18 is used to collect the water discharged by the discharge pipe 16, the front end of the water outlet pipe 11 is inserted into the inner wall of the water collecting tank 18, and the bottom of the back of the water collecting tank 18 is fixedly connected with a waste water pipe 19.

[0032] Embodiment three:

[0033] Please refer to Figures 1 to 5 As shown, the top of one side of the installation box 1 is fixedly connected with a third support frame 20, one side of the top of the third support frame 20 is fixedly connected with a temperature control box 21, both sides of the temperature control box 21 are electrically connected with temperature measuring resistors 22, the temperature control box 21 connects the power supply of the plurality of temperature measuring resistors 22 on both sides of the surface, and the surface of the temperature measuring resistors 22 is inserted into the inside of the first stratum 3, the second stratum 4, the third stratum 5, the fourth stratum 6 and the simulation box 8, the temperature measuring resistors 22 are provided in total 8 groups for temperature measurement, six groups for temperature measurement of simulated rock strata, two groups for temperature measurement of water accumulation in the simulation box 8, two groups for temperature measurement of the first stratum 3, the second stratum 4 and the third stratum 5, and the fourth stratum 6 is too shallow and does not set temperature measurement in the experiment, and finally tests the pumping temperature.

[0034] Example four:

[0035] Please refer to Figures 1 to 5 As shown, based on the actual geological data (the device relies on the geological conditions of Nanshan Mine to establish a model), a goaf 7 heat storage model is established according to the thermal physical parameters and spatial geometric characteristics of the goaf rock, which simulates four strata.

[0036] Temperature measurement setting: temperature measurement is provided in total 8 groups for temperature measurement, six groups for temperature measurement of simulated rock strata, two groups for temperature measurement of water accumulation in the simulation box 8, two groups for temperature measurement of the first stratum 3, the second stratum 4 and the third stratum 5, and the fourth stratum 6 is too shallow and does not set temperature measurement in the experiment.

[0037] Simulation of goaf heat storage: the simulation box 8 is provided with a water inlet pipe 10 and a drain pipe 11, the water inlet pipe 10 is provided in one group, the drain pipe 11 is provided in one group, the size of the water inlet pipe 10 is 0.03m, the size of the drain pipe 11 is 0.03m, when temperature measurement is performed, an adjustable flow pump is used for pumping, and the temperature of water samples with different flow rates is tested, since the water injection temperature is too high, the simulation box 8 also needs to be provided with an air vent 9.

[0038] Experimental temperature measurement: the temperature measurement device adopts an eight-way temperature control device, in addition, a water injection tank 13 and a water collecting tank 18 are respectively provided, water injection can be performed when water injection is performed, water pumping can be performed when water pumping is performed, and the pumping temperature is tested.

[0039] Working principle: when in use, the stratum inside the box body is kept warm by the heat preservation layer 2, and the first stratum 3, the second stratum 4, the third stratum 5 and the fourth stratum 6 are arranged in the box body 1, wherein the first stratum 3 is the Shitouhezi group stratum, the composition is mainly conglomerate, sandy conglomerate, coarse conglomerate and sandstone, the second stratum 4 is the Shitumiaozi group stratum, the composition is mainly medium and coarse sandstone, conglomerate and sandy conglomerate, the third stratum 5 is the Cretaceous lower Dongshan group stratum, the soil is mainly breccia, tuff and conglomerate, and the fourth stratum 6 is the Cenozoic Quaternary stratum, the soil is black humus soil and yellowish brown clay, and the goaf 7 is arranged in the first stratum 3, the goaf 7 is simulated by the simulation box 8, and the water inlet pipe 10 and the drain pipe 11 are inserted in the simulation box 8, wherein the water inlet pipe 10 is arranged as a group, the size is 0.03m, the drain pipe 11 is arranged as a group, and the size can be 0.03m, when measuring the temperature, the water pump with adjustable flow is used to test the temperature of the water sample under different flow, because the water injection temperature is too high, the exhaust hole 9 is arranged at the top of the simulation box 8, the back of the water injection tank 13 injects water into the water inlet pipe 10 through the water injection pipe 14, so that the simulation box 8 stores water, the water pump 15 is connected to the power supply, the output end of the water pump 15 discharges the water in the simulation box 8 through the discharge pipe 16, the water discharged by the discharge pipe 16 is collected by the water collecting tank 18, the temperature control box 21 connects the multiple temperature measuring resistors 22 on the two sides of the surface to the power supply, the temperature measuring resistors 22 are arranged as 8 groups for temperature measurement, six groups of temperature measurement are simulated, two groups of temperature measurement are simulated for the accumulated water in the simulation box 8, two groups of temperature measurement are arranged for the first stratum 3, the second stratum 4 and the third stratum 5 respectively, the fourth stratum 6 is too shallow, and the experiment does not set temperature measurement, and finally the pumping temperature is tested.

[0040] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An experimental device for simulating the thermal energy storage in a mined-out area of a multi-layered geological structure, characterized in that, Include: The installation box (1) is fixedly connected with the heat preservation layer (2) on one side of the inner wall of the installation box (1), and the first ground layer (3) is fixedly connected to the bottom of the inner wall of the heat preservation layer (2). The top of the first ground layer (3) is fixedly connected with the second ground layer (4), and the top of the second ground layer (4) is fixedly connected with the third ground layer (5), and the top of the third ground layer (5) is fixedly connected with the fourth ground layer (6). The inner wall of the first ground layer (3) is provided with a mined-out area (7), and the inner wall of the mined-out area (7) is fixedly connected with a simulation box (8). A plurality of exhaust holes (9) are formed in the top of the simulation box (8), a water inlet pipe (10) is inserted into one side of the inner wall of the simulation box (8), and the surface of the water inlet pipe (10) penetrates and is inserted into the inner walls of the second ground layer (4), the third ground layer (5) and the fourth ground layer (6). A drain pipe (11) is inserted into the other side of the inner wall of the simulation box (8), and the surface of the drain pipe (11) penetrates and is inserted into the inner walls of the second ground layer (4), the third ground layer (5) and the fourth ground layer (6). The surface of the installation box (1) is fixedly connected with a first support frame (12), and the top of the first support frame (12) is overlapped with a water injection tank (13).

2. The experimental apparatus for simulating the thermal energy storage in the goaf of a multi-layered geological structure of claim 1, wherein: The bottom of the back of the water injection tank (13) is fixedly connected with a water injection pipe (14), and one side of the surface of the water injection pipe (14) is inserted into the top end of the water inlet pipe (10).

3. The experimental apparatus for simulating the thermal energy storage in the goaf of a multi-layered geological structure of claim 2, wherein: One side of the inner wall of the simulation box (8) is fixedly connected with a water pump (15), and the output end of the water pump (15) is provided with a discharge pipe (16), and the front end of the discharge pipe (16) penetrates and is inserted into the inner wall of the drain pipe (11).

4. The experimental apparatus for simulating the thermal energy storage in the goaf of a multi-layered geological structure of claim 1, wherein: One side of the back of the installation box (1) is fixedly connected with a second support frame (17), and the top of the second support frame (17) is overlapped with a water collecting tank (18), and the front end of the drain pipe (11) is inserted into the inner wall of the water collecting tank (18). The bottom of the back of the water collecting tank (18) is fixedly connected with a waste water pipe (19).

5. The experimental apparatus for simulating the thermal energy storage in the goaf of a multi-layered geological structure of claim 1, wherein: The top of one side of the installation box (1) is fixedly connected with a third support frame (20), one side of the top of the third support frame (20) is fixedly connected with a temperature control box (21), and the temperature control box (21) is electrically connected with temperature measuring resistors (22) on both sides. The surface of the temperature measuring resistor (22) is inserted into the inner walls of the first ground layer (3), the second ground layer (4), the third ground layer (5), the fourth ground layer (6) and the simulation box (8).

6. The experimental apparatus for simulating the thermal energy storage in the goaf of a multi-layered geological structure of claim 1, wherein: ​

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