Low-temperature mine waste heat recovery constant temperature heating device

Abstract

The utility model discloses low temperature mine waste heat recovery constant temperature heating device, specifically related to mine waste heat recovery technical field, including the temporary storage cylinder, be provided with heat exchange heating subassembly on the temporary storage cylinder, heat exchange heating subassembly includes the pre -buried cylinder of setting in the bottom of temporary storage cylinder, the middle part of temporary storage cylinder is provided with heat conduction pole, and the bottom of heat conduction pole penetrates temporary storage cylinder and extends to in pre -buried cylinder. The utility model discloses through the heat absorption cover increase heat absorption area, cooperate motor drive heat conduction pole rotation, accelerate the waste heat air flow and circulating water stirring, solve traditional waste heat recovery heat absorption slow, the water temperature uneven problem, and the elastic support rib can buffer heat conduction board thermal expansion and cold shrink deformation simultaneously, and heat conduction pole adopts copper aluminium composite material, and heat transfer efficiency is high, ensures that circulating water steady heating to a certain range, realizes constant temperature heating.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology in mines, and more specifically, to a low-temperature mine waste heat recovery constant temperature heating device. Background Technology

[0002] In the coal mining industry, with the continuous increase in mining depth (my country has built more than 50 wells exceeding 1,000 meters in depth), the original underground ground temperature has shown a significant upward trend. Combined with the continuous heat dissipation generated during the operation of mining equipment, the ambient temperature in some underground areas often exceeds 30°C, creating a serious "heat hazard" problem. This problem not only leads to health risks such as heatstroke and rapid decline in physical strength for workers, but also causes insulation aging and short-circuit faults in electrical equipment due to high-temperature operation. Furthermore, it may induce spontaneous combustion of coal, posing a significant threat to coal mine safety.

[0003] Meanwhile, as a high-energy-consuming sector, the coal mining industry's energy consumption needs are concentrated in three major scenarios: heating, cooling, and hot water. On the one hand, in northern mining areas, stable heating is needed for surface office buildings and employee dormitories during winter, as well as antifreeze heating for mine entrances. Traditional methods rely on burning coal and natural gas or consuming large amounts of electricity, which not only results in high energy costs but also generates large amounts of pollutants such as CO2 and SO2, contradicting the national "dual carbon" target. On the other hand, there is a large amount of low-grade heat energy underground that is not effectively utilized—namely, low-temperature mine waste heat. This waste heat originates from heat dissipation in the underground environment, production systems (such as drainage and ventilation systems), and emissions from auxiliary facilities. The temperature range is generally between 20-60℃ (up to 80℃ around some high-heat-dissipation equipment). It is a "free and continuous" clean energy source, but it has long been in a state of direct emission and serious waste, failing to effectively connect with surface energy demand. Therefore, a low-temperature mine waste heat recovery constant temperature heating device is provided. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a low-temperature mine waste heat recovery constant temperature heating device, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a low-temperature mine waste heat recovery constant temperature heating device, including a temporary storage cylinder, on which a heat exchange heating component is provided; The heat exchange heating component includes a pre-embedded cylinder set at the bottom of the temporary storage cylinder, and a heat conduction rod is set in the middle of the temporary storage cylinder. The bottom end of the heat conduction rod passes through the temporary storage cylinder and extends into the pre-embedded cylinder. A reinforcing frame is provided at one end of the heat conduction rod located inside the pre-embedded cylinder. A heat conduction plate is provided at the bottom end of the reinforcing frame. A heat absorption cover is provided at the bottom of the heat conduction plate. An elastic support rib is provided between the reinforcing frame and the heat conduction plate.

[0006] Optionally, in a possible implementation, a temperature sensor is provided on the outside of the pre-embedded cylinder, one end of the temperature sensor extends into the pre-embedded cylinder, a water inlet pipe is provided on one side of the top of the temporary storage cylinder, and a water outlet pipe is provided on the other side of the top of the temporary storage cylinder. Both the water inlet pipe and the water outlet pipe are connected to the temporary storage cylinder, and conduits are respectively provided on the water inlet pipe and the water outlet pipe. A pipe connector is provided at one end of each of the two conduits, and the pipe connector is threadedly connected to the conduit. A motor is provided at the bottom of the temporary storage cylinder, and the output end of the motor extends to the top of the heat conduction rod. The technical effects and advantages of this utility model are as follows: By increasing the heat absorption area through the heat absorption hood and cooperating with the motor to drive the heat conduction rod to rotate, the flow of waste heat air and the stirring of circulating water are accelerated, solving the problems of slow heat absorption and uneven water temperature in traditional waste heat recovery. Meanwhile, the elastic support ribs can buffer the thermal expansion and contraction deformation of the heat conduction plate, and the heat conduction rod is made of copper-aluminum composite material, which has high heat transfer efficiency, ensuring that the circulating water is stably heated to a certain range and achieving constant temperature heating. By recovering redundant heat from the well, the local ambient temperature can be reduced, and the pre-embedded cylinder can be directly embedded in the area where residual heat is concentrated, adapting to different well working conditions. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0008] Figure 1 This is a front view of the overall structure of this utility model.

[0009] Figure 2 This is a side view of the overall structure of this utility model.

[0010] Figure 3 This is a schematic diagram of the motor, inlet pipe, outlet pipe, temporary storage cylinder, temperature sensor, and embedded cylinder of this utility model.

[0011] Figure 4 This is a schematic diagram of the heat conduction rod, reinforcing frame, elastic support ribs, heat conduction plate, and heat absorption cover of this utility model.

[0012] The attached diagram is labeled as follows: 1. Temporary storage cylinder; 2. Embedded cylinder; 3. Heat conduction rod; 4. Reinforcing frame; 5. Heat conduction plate; 6. Elastic support rib; 7. Heat absorption cover; 8. Temperature sensor; 9. Water inlet pipe; 10. Water outlet pipe; 11. Conduit; 12. Pipe joint; 13. Motor. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This embodiment discloses a low-temperature mine waste heat recovery and constant-temperature heating device, the overall structure of which is shown in the attached figure. Figure 1 and attached Figure 2 As shown, the core includes a temporary storage cylinder 1 and a heat exchange and heating assembly mounted on the temporary storage cylinder 1. The specific connections and structures of each component are as follows: As attached Figure 1 and attached Figure 3 As shown, the temporary storage cylinder 1 is a cylindrical hollow structure with a pre-embedded cylinder 2 fixedly welded to its bottom. The pre-embedded cylinder 2 is made of high-temperature resistant stainless steel. When in use, the pre-embedded cylinder 2 needs to be embedded into the underground waste heat concentration area, such as the heat dissipation area of ​​underground equipment or the side wall of the roadway with high ground temperature. The pre-embedded cylinder 2 directly contacts the low-temperature waste heat source, providing a foundation for subsequent heat exchange.

[0015] As attached Figure 4 As shown, a heat conduction rod 3 is vertically installed through the middle of the temporary storage cylinder 1. The heat conduction rod 3 is made of copper-aluminum composite material, with its top end located in the upper half of the interior of the temporary storage cylinder 1 and its bottom end extending through the bottom wall of the temporary storage cylinder 1 to the central axis of the embedded cylinder 2. A reinforcing frame 4 is bolted to one end of the heat conduction rod 3 inside the embedded cylinder 2; the reinforcing frame 4 is a cross-shaped metal frame. The bottom end of the reinforcing frame 4 is connected to the heat conduction plate 5 through elastic support ribs 6, which can buffer the thermal expansion and contraction deformation of the heat conduction plate 5 caused by temperature changes. The heat conduction plate 5 is a circular copper plate, and a heat absorption cover 7 is welded to its bottom; the heat absorption cover 7 has a hemispherical structure with spiral heat dissipation fins on its inner wall, which can increase the contact area with the residual hot air inside the embedded cylinder 2 and improve the heat absorption efficiency.

[0016] As attached Figure 3 As shown, a mounting base for a temperature sensor 8 is welded to the middle of the outer wall of the pre-embedded cylinder 2. The temperature sensor 8 is a PT100 platinum resistance sensor, and its detection end penetrates through the side wall of the pre-embedded cylinder 2 and extends into the interior of the pre-embedded cylinder 2. It can monitor the residual heat temperature inside the pre-embedded cylinder 2 in real time, providing data support for subsequent constant temperature control.

[0017] As attached Figure 1 and attached Figure 3 As shown, an inlet pipe 9 is welded to one side of the top of the temporary storage cylinder 1, and an outlet pipe 10 is welded to the other side. Both the inlet pipe 9 and the outlet pipe 10 are connected to the internal cavity of the temporary storage cylinder 1, forming a "side-in, side-out" water circulation path to avoid dead zones in the water flow within the temporary storage cylinder 1. A conduit 11 is welded to the end of both the inlet pipe 9 and the outlet pipe 10 furthest from the temporary storage cylinder 1. The inner diameter of the conduit 11 is the same as that of the inlet pipe 9 and the outlet pipe 10, and a pipe connector 12 is provided at one end of the conduit 11. The pipe connector 12 is threadedly connected to the conduit 11, and the other end of the pipe connector 12 can be connected to the circulating water pipe of the ground heating network, thus achieving water circulation connection between the temporary storage cylinder 1 and the heating network.

[0018] As attached Figure 1 and attached Figure 3 As shown, a motor 13 is fixedly installed at the center of the bottom end of the temporary storage cylinder 1 via a flange. The motor 13 is an explosion-proof stepper motor, and its output shaft passes through the bottom wall of the temporary storage cylinder 1 and is fixedly connected to the top of the heat conduction rod 3 via a coupling. The motor 13 can drive the heat conduction rod 3 to rotate around its own axis, thereby driving the reinforcing frame 4, the heat conduction plate 5, and the heat absorption cover 7 to rotate synchronously, enhancing the flow of residual heat air in the pre-embedded cylinder 2, improving the heat absorption efficiency, and at the same time stirring the circulating water in the temporary storage cylinder 1 to make the circulating water heat evenly. The specific working principle is as follows: First, the pre-embedded cylinder 2 is embedded in the underground residual heat concentration area to ensure that the heat absorption cover 7 is completely within the residual heat coverage area; the water inlet pipe 9 and the water outlet pipe 10 are connected to the circulating water pipe of the ground heating network through the pipe joint 12 to inject circulating water into the temporary storage cylinder 1 and the heating network; the temperature sensor 8 is activated to monitor the residual heat temperature in the pre-embedded cylinder 2 in real time.

[0019] The low-temperature waste heat inside the pre-embedded cylinder 2 is transferred to the heat absorption hood 7 through heat conduction. The spiral fins on the heat absorption hood 7 increase the heat absorption area and quickly transfer the heat to the heat conduction plate 5. The heat conduction plate 5 transfers the heat to the reinforcing frame 4 through the elastic support ribs 6, and then from the reinforcing frame 4 to the heat conduction rod 3. At the same time, the motor 13 is started to drive the heat conduction rod 3 to rotate, which in turn drives the heat absorption hood 7 and the heat conduction plate 5 to rotate, accelerating the flow of waste heat air inside the pre-embedded cylinder 2, thereby improving the heat absorption efficiency of the heat absorption hood 7. The heat is continuously transferred to the circulating water in the temporary storage cylinder 1 through the heat conduction rod 3.

[0020] During the rotation of the heat transfer rod 3, the circulating water in the temporary storage cylinder 1 is stirred to ensure uniform heating. When the temperature sensor 8 detects that the residual heat temperature in the embedded cylinder 2 is stable above 30°C, the temperature of the circulating water in the temporary storage cylinder 1 can rise from the initial 15°C to 40-50°C. At this time, the heated circulating water in the temporary storage cylinder 1 is transported to the radiators or floor heating system of the ground office building and staff dormitory through the outlet pipe 10 via the circulation pump of the ground heating network to provide indoor heating. After heat dissipation, the circulating water flows back to the temporary storage cylinder 1 through the inlet pipe 9 to receive heat transferred by the heat transfer rod 3 again, forming a circulating heating system.

[0021] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low-temperature mine waste heat recovery constant temperature heating device, comprising a temporary storage cylinder (1), characterized in that: The temporary storage cylinder (1) is equipped with a heat exchange and heating component; The heat exchange heating component includes a pre-embedded cylinder (2) set at the bottom of the temporary storage cylinder (1), and a heat conduction rod (3) is set in the middle of the temporary storage cylinder (1). The bottom end of the heat conduction rod (3) passes through the temporary storage cylinder (1) and extends into the pre-embedded cylinder (2). The heat conduction rod (3) is provided with a reinforcing frame (4) at one end inside the pre-embedded cylinder (2). A heat conduction plate (5) is provided at the bottom of the reinforcing frame (4). A heat absorption cover (7) is provided at the bottom of the heat conduction plate (5). An elastic support rib (6) is provided between the reinforcing frame (4) and the heat conduction plate (5).

2. The low-temperature mine waste heat recovery constant temperature heating device according to claim 1, characterized in that: A temperature sensor (8) is provided on the outside of the pre-embedded cylinder (2), and one end of the temperature sensor (8) extends into the pre-embedded cylinder (2).

3. The low-temperature mine waste heat recovery constant temperature heating device according to claim 1, characterized in that: A water inlet pipe (9) is provided on one side of the top of the temporary storage cylinder (1), and a water outlet pipe (10) is provided on the other side of the top of the temporary storage cylinder (1).

4. The low-temperature mine waste heat recovery constant temperature heating device according to claim 3, characterized in that: The inlet pipe (9) and outlet pipe (10) are both connected to the temporary storage cylinder (1), and the inlet pipe (9) and outlet pipe (10) are respectively provided with conduits (11).

5. The low-temperature mine waste heat recovery constant temperature heating device according to claim 4, characterized in that: Each of the two conduits (11) is provided with a pipe connector (12) at one end, and the pipe connector (12) is threadedly connected to the conduit (11).

6. The low-temperature mine waste heat recovery constant temperature heating device according to claim 1, characterized in that: The bottom end of the temporary storage cylinder (1) is provided with a motor (13), and the output end of the motor (13) extends to the top of the heat conduction rod (3).

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