Active heat exchange energy pile for restoring environment of coal gangue dump

Abstract

The present application relates to the technical fields of geotechnical engineering, mining engineering and environmental engineering. Provided is an active heat exchange energy pile for restoring the environment of a coal gangue dump. The energy pile comprises a pile body, a heat dissipator, a heat exchange system, and a photovoltaic power generation and control system, wherein the heat inside a coal gangue accumulation body is transferred to a heat conduction liquid in a heat transfer tube by means of the pile body; the heat conduction liquid is driven by a flow guide pump to flow into a heat dissipation tube along the heat transfer tube and then transfers the heat to the heat dissipator; and under the action of a fan, the heat is dissipated into the atmospheric environment by means of several heat dissipation fins. The solution provided in the present application has the following beneficial effects: for an oxidation exothermic reaction during a stacking process of coal gangue, the heat inside the accumulation body is actively conducted to the earth's surface, thereby guaranteeing that the temperature of the coal gangue is lower than the critical value for spontaneous combustion, and thus preventing the occurrence of spontaneous combustion; and the present application has the advantages of a simple structure, high level of integration, low cost, and being easy and convenient to operate.

Description

An active heat exchange energy pile for coal gangue yard environmental restoration Technical Field

[0001] The present application relates to the technical fields of geotechnical engineering, mining engineering, and environmental engineering, and in particular to an active heat exchange energy pile for environmental restoration of coal gangue dumps. Background Art

[0002] Gangue is a solid waste generated during coal mining, washing, and processing. Currently, coal mine gangue discharges account for approximately 8-20% of all coal mined. Gangue storage creates numerous environmental problems. For example, spontaneous combustion of gangue produces large amounts of toxic and harmful gases such as SO₂, CO, and H₂S, polluting the atmosphere. After spontaneous combustion or weathering, heavy metals and other toxic and harmful substances contained in gangue are leached by rainwater, generating heavy metal wastewater. Spontaneous combustion of a gangue pile can last for over a decade or even decades. These harmful gas emissions not only reduce air quality around the pile, impacting the health of residents in the mining area, but also often negatively impact the surrounding ecological environment, slowing tree growth, increasing pests and diseases, and reducing or even killing crop yields. Existing technologies primarily rely on passive heat dissipation to transfer underground temperature to the surface, which is inefficient, poorly effective, and easily affected by ambient temperature. Therefore, the development of active heat exchange energy piles suitable for environmental remediation of gangue piles is urgently needed. Summary of the Invention

[0003] The purpose of this application is to overcome the shortcomings of the existing technology and provide an active heat exchange energy pile for coal gangue yard environmental restoration. In response to the exothermic oxidation reaction during the coal gangue stacking process, the heat inside the pile is actively transferred to the surface to ensure that the temperature of the coal gangue is lower than the critical value of spontaneous combustion, thereby preventing spontaneous combustion.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] An active heat exchange energy pile for coal gangue yard environmental restoration comprises a pile body, a radiator, a heat exchange system, a photovoltaic power generation and control system.

[0006] Furthermore, the pile body is a closed tubular structure, consisting of an underground section and an above-ground section, which is the main part of the energy pile; the surface of the underground section is provided with an annular protrusion for improving the stability of the pile when buried in the coal gangue pile; the surface of the above-ground section is smooth and is used to connect the underground section and the radiator;

[0007] The radiator is located above the pile and consists of a main frame, several radiating fins, a fan, and a parasol. It is used to dissipate the heat transferred from the energy pile into the atmosphere. The main frame is a rectangular parallelepiped structure. Several radiating fins are placed vertically and evenly distributed outside the main frame. The fan is located above the radiating fins to accelerate heat dissipation. The parasol is located above the fan to block direct sunlight and prevent the radiating fins from heating up.

[0008] The heat exchange system is installed inside the pile body and the radiator, and is composed of a heat transfer pipe, a diversion pump, and a heat dissipation pipe, and is used to transfer heat from the coal gangue accumulation to the radiator; the heat transfer pipe is located inside the pile body, and is filled with heat transfer fluid. In order to increase the heat absorption contact area, the buried section adopts a spiral buckle form; the diversion pump is located between the heat transfer pipe and the heat dissipation pipe inside the radiator, and is used to drive the heat transfer fluid to circulate along the heat transfer pipe and the heat dissipation pipe; the heat dissipation pipe is distributed on the inner wall of the radiator main frame in the form of a spiral buckle;

[0009] The heat transfer mode of the device is as follows: the heat inside the coal gangue pile is transferred to the heat transfer fluid in the heat transfer tube through the pile body. Driven by the diversion pump, the heat transfer fluid flows along the heat transfer tube to the heat dissipation pipe and transfers the heat to the radiator. Under the action of the fan, the heat is dissipated into the atmosphere through several heat sinks. After cooling, the heat transfer fluid flows back to the heat transfer tube and the above process is repeated.

[0010] The photovoltaic power generation and control system consists of a controller, several photovoltaic panels, a lithium battery, and several temperature sensors, which are used to provide power energy and system control for the entire device; the controller is located at the top of the device and is used to control the start and stop of the fan and diversion pump, as well as to collect signals from several temperature sensors; the several photovoltaic panels are evenly distributed below the controller and are used to generate electricity; the lithium battery is located below the several photovoltaic panels and is used to store the electricity generated by the several photovoltaic panels and transmit it to the fan, diversion pump, controller and several temperature sensors; the several temperature sensors are located on the inner wall of the buried section of the pile body and can sense the temperature inside the coal gangue pile and transmit the signal to the controller.

[0011] Compared with the prior art, the technical solution provided in this application has the following beneficial effects, as an example but not as a limitation:

[0012] This application is applicable to the fields of geotechnical engineering, mining engineering, and environmental engineering technology. It targets the exothermic oxidation reaction during the stacking of coal gangue, and actively conducts the heat inside the pile to the surface, ensuring that the temperature of the coal gangue is lower than the critical value of spontaneous combustion, thereby preventing spontaneous combustion. It has the advantages of simple structure, high degree of integration, low cost, and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic structural diagram of an active heat exchange energy pile for coal gangue dump environmental remediation provided by an embodiment of the present application;

[0014] FIG2 is a schematic diagram of the installation of an active heat exchange energy pile for environmental remediation of a coal gangue dump provided in an embodiment of the present application.

[0015] Description of Reference Numerals

[0016] 1 is the pile body, 2 is the radiator, 3 is the heat exchange system, 4 is the photovoltaic power generation and control system, and 5 is the coal gangue accumulation body;

[0017] 11 is the underground section, 12 is the above-ground section;

[0018] 21 is the main frame, 22 is the heat sink, 23 is the fan, and 24 is the parasol;

[0019] 31 is a heat transfer pipe, 32 is a flow guide pump, and 33 is a heat dissipation pipe;

[0020] 41 is a controller, 42 is a photovoltaic panel, 43 is a lithium battery, and 44 is a temperature sensor. DETAILED DESCRIPTION

[0021] The technical solution provided in this application will be further described below in conjunction with specific embodiments and their accompanying drawings.

[0022] The advantages and features of the present application will become clearer with reference to the following description. It should be noted that the embodiments of the present application have better feasibility and are not intended to limit the present application in any form. The technical features or combinations of technical features described in the embodiments of the present application should not be considered to be isolated, and they can be combined with each other to achieve better technical effects. The scope of the preferred embodiments of the present application may also include other implementations, and this should be understood by those skilled in the art in the technical field to which the embodiments of the present application belong.

[0023] Techniques, methods, and apparatus known to persons of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0024] The drawings of this application are all in a very simplified form and are not in precise proportions. They are only used to conveniently and clearly assist in explaining the purpose of the embodiments of this application, and are not intended to limit the conditions under which this application can be implemented. Any structural modification, change in proportional relationship, or adjustment of size should fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. The same reference numerals appearing in the drawings of this application represent the same features or components and can be applied to different embodiments.

[0025] As shown in FIG1 , an active heat exchange energy pile for coal gangue dump environmental remediation includes a pile body 1 , a radiator 2 , a heat exchange system 3 , and a photovoltaic power generation and control system 4 ;

[0026] The pile body 1 is a closed tubular structure, consisting of an underground section 11 and an above-ground section 12. The underground section 11 is provided with an annular protrusion on its surface; the above-ground section 12 is smooth and is used to connect the underground section 11 and the radiator 2.

[0027] The radiator 2 is located above the pile body 1 and consists of a main frame 21, 68 heat sinks 22, a fan 23, and a parasol 24. The main frame 21 is a rectangular parallelepiped structure made of pure aluminum. The 68 heat sinks 22 are made of pure aluminum and are vertically placed and evenly distributed on the outside of the main frame 21. The fan 23 is located above the 68 heat sinks 22. The parasol 24 is located above the fan 23.

[0028] The heat exchange system 3 is installed inside the pile body 1 and the radiator 2 and consists of a heat transfer tube 31, a flow guide pump 32, and a heat dissipation tube 33. The heat transfer tube 31 is located inside the pile body 1 and is made of pure copper. It is filled with a heat transfer fluid (Great Wall L-QC 320 mineral oil-based synthetic heat transfer fluid). The buried section 11 is in a spiral buckled form. As shown in Figure 1A, the flow guide pump 32 is located inside the radiator 2 between the heat transfer tube 31 and the heat dissipation tube 33. The heat dissipation tube 33 is made of pure copper and is distributed in a spiral buckled form on the inner wall of the main frame 21 of the radiator 2.

[0029] The photovoltaic power generation and control system 4 consists of a controller 41, four photovoltaic panels 42, a lithium battery 43, and three temperature sensors 44; the controller 41 is located at the top of the device and can control the start and stop of the fan 23 and the diversion pump 32, as well as the signal collection of the three temperature sensors 44; the four photovoltaic panels 42 are evenly distributed below the controller 41; the lithium battery 43 is located below the four photovoltaic panels 42, and can store the electricity generated by the four photovoltaic panels 42 and transmit it to the fan 23, the diversion pump 32, the controller 41 and the three temperature sensors 44; the three temperature sensors 44 are located on the inner wall of the buried section 11 of the pile body 1, and can sense the temperature inside the coal gangue accumulation body 5 and transmit the signal to the controller 41.

[0030] As shown in Figure 2, the underground section 11 of the pile body 1 is buried inside the coal gangue pile 5, and the above-ground section 12 is located above the ground surface; the heat transfer mode of the device is: the heat inside the coal gangue pile 5 is transferred to the heat transfer fluid in the heat transfer tube 31 through the pile body 1. Driven by the diversion pump 32, the heat transfer fluid flows along the heat transfer tube 31 into the heat dissipation tube 33 and then transfers the heat to the radiator 2. Under the action of the fan 23, the heat is dissipated into the atmospheric environment through the sixty-eight heat sinks 22. After cooling, the heat transfer fluid flows back to the heat transfer tube 31 and the above process is repeated.

[0031] In a preferred embodiment, the four photovoltaic panels 42 are connected to the lithium battery 43 via wires, which can store the electricity generated by the four photovoltaic panels 42; the lithium battery 43 is connected to the fan 23, the diversion pump 32, the controller 41 and the three temperature sensors 44 via wires, which can supply electricity to the above-mentioned devices; the controller 41 is connected to the fan 23 and the diversion pump 32 via wires, and the startup and shutdown of the above-mentioned devices are controlled by an internal program; the controller 41 is connected to the three temperature sensors 44 via wires, and the signals of the three temperature sensors 44 are collected by internal program control.

[0032] This application provides an active heat exchange energy pile for coal gangue dump environmental remediation, and its working mode and application are as follows:

[0033] 1) First, the underground section 11 of the pile body 1 is buried inside the coal gangue accumulation body 5, and the above-ground section 12 is located above the surface. Four photovoltaic panels 42 generate electricity and store it in lithium batteries 43, which then transmit it to the entire system.

[0034] 2) Three temperature sensors 44 measure the internal temperature of the gangue accumulation body 5. When the temperature is higher than the upper temperature limit (50 degrees Celsius), the controller 41 starts the fan 23 and the diversion pump 32 through the internal program;

[0035] 3) Heat from the gangue accumulation 5 is transferred through the pile body 1 to the heat transfer fluid in the heat transfer tube 31. Driven by the diversion pump 32, the heat transfer fluid flows along the heat transfer tube 31 into the heat dissipation tube 33, where it transfers the heat to the radiator 2. Driven by the fan 23, the heat is dissipated into the atmosphere through the sixty-eight heat sinks 22.

[0036] 4) After cooling, the heat transfer fluid flows back to the heat transfer tube 31 and the above process is repeated;

[0037] 5) When the internal temperature of the gangue accumulation body 5 is lower than the lower temperature limit (30 degrees Celsius), the controller 41 turns off the fan 23 and the diversion pump 32 through the internal program.

[0038] The above description is only a description of the preferred embodiments of the present application and does not limit the scope of the present application. Any changes or modifications made by any person skilled in the art based on the above disclosed technical content should be regarded as equivalent valid embodiments and fall within the scope of protection of the technical solution of the present application.

Claims

1. An active heat exchange energy pile for environmental restoration of coal gangue dump, characterized by: The invention comprises a pile body (1), a radiator (2), a heat exchange system (3), and a photovoltaic power generation and control system (4); the pile body (1) is the main part of the energy pile and is used for structural support; the radiator (2) is used for dissipating the heat transferred inside the energy pile into the atmosphere; the heat exchange system (3) is used for transferring the heat inside the coal gangue accumulation body (5) to the radiator (2); and the photovoltaic power generation and control system (4) is used for providing electric energy and system control for the entire device.

2. The active heat exchange energy pile for coal gangue dump environmental restoration according to claim 1 is characterized by: The pile body (1) is a closed tubular structure, consisting of an underground section (11) and an above-ground section (12); the surface of the underground section (11) is provided with an annular protrusion for improving the stability of being buried in a coal gangue accumulation body (5); the surface of the above-ground section (12) is smooth and is used to connect the underground section (11) and the radiator (2).

3. The active heat exchange energy pile for coal gangue dump environmental restoration according to claim 1 is characterized by: The radiator (2) is located above the pile body (1), and is composed of a main frame (21), a plurality of radiating fins (22), a fan (23), and a sunshade (24); the main frame (21) is a rectangular parallelepiped structure, and is made of pure aluminum; the plurality of radiating fins (22) are made of pure aluminum, and are vertically placed and evenly distributed on the outside of the main frame (21); the fan (23) is located above the plurality of radiating fins (22) and is used to accelerate heat dissipation; the sunshade (24) is located above the fan (23) and is used to shield the plurality of radiating fins (22) from direct sunlight and prevent the plurality of radiating fins (22) from heating up.

4. The active heat exchange energy pile for coal gangue dump environmental restoration according to claim 1 is characterized by: The heat exchange system (3) is installed inside the pile body (1) and the radiator (2), and is composed of a heat transfer pipe (31), a flow guide pump (32), and a heat dissipation pipe (33); the heat transfer pipe (31) is located inside the pile body (1), the heat transfer pipe (31) is made of pure copper, and is filled with heat transfer fluid (Great Wall L-QC 320 mineral oil type synthetic heat transfer oil), and in order to increase the heat absorption contact area, the buried section (11) is in the form of a spiral buckle; the flow guide pump (32) is located between the heat transfer pipe (31) and the heat dissipation pipe (33) inside the radiator (2), and is used to drive the heat transfer fluid to circulate along the heat transfer pipe (31) and the heat dissipation pipe (33); the heat dissipation pipe (33) is made of pure copper and is distributed on the inner wall of the main frame (21) of the radiator (2) in the form of a spiral buckle.

5. The active heat exchange energy pile for coal gangue dump environmental restoration according to claim 1 is characterized by: The photovoltaic power generation and control system (4) is composed of a controller (41), a plurality of photovoltaic panels (42), a lithium battery (43), and a plurality of temperature sensors (44); the controller (41) is located at the top of the device and is used for starting and stopping the fan (23) and the diversion pump (32), and collecting signals from the plurality of temperature sensors (44); the plurality of photovoltaic panels (42) are evenly distributed below the controller (41) and are used for generating electricity; the lithium battery (43) is located below the plurality of photovoltaic panels (42) and is used for storing the electricity generated by the plurality of photovoltaic panels (42) and transmitting it to the fan (23), the diversion pump (32), the controller (41) and the plurality of temperature sensors (44); the plurality of temperature sensors (44) are located on the inner wall of the buried section (11) of the pile body (1) and can sense the temperature inside the coal gangue accumulation body (5) and transmit the signal to the controller (41).

6. The active heat exchange energy pile for coal gangue dump environmental restoration according to claim 1, characterized in that: The heat transfer mode of the device is as follows: the heat inside the gangue accumulation body (5) is transferred to the heat transfer fluid in the heat transfer tube (31) through the pile body (1); the heat transfer fluid flows into the heat dissipation tube (33) along the heat transfer tube (31) under the drive of the flow guide pump (32) and then transfers the heat to the radiator (2); under the action of the fan (23), the heat is dissipated into the atmosphere through a plurality of heat dissipation fins (22); after cooling, the heat transfer fluid flows back to the heat transfer tube (31) and the above process is repeated.

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