Fresh air heat supply system for mine
By designing the fresh air heating system for ore, the problem of frozen well phenomenon and high energy consumption is solved, and the controllability and safety of the fresh air temperature are realized.
Patent Information
- Application Number
- CN202421172064.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-27
AI Technical Summary
In mines, cold air in low temperatures and cold air in winter is likely to cause freezing wells, affecting production safety and workers' health. The existing methods of heating fresh air consume high energy and are difficult to control temperature.
Design a fresh air heating system for mines, including heat storage units, heat exchange units and exhaust channels. After the new air is exchanged with the heat exchange of the thermal pipeline and the heat storage cavity, the new air enters the exhaust channel and the gap between the wind channel and the gap between the well to form a warm air with a suitable temperature.
Through this system, the temperature of the fresh air can be controlled, saving energy, effectively preventing the freezing of the well, and preventing overheating from causing harm to personnel and equipment in the well.
Smart Images
Figure CN222391433U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of mining technology, and in particular to a fresh air heating system for a mine. Background Art
[0002] Mine shafts are often used to introduce fresh air into the shaft, exhaust polluted air out of the shaft, and transport personnel or materials. In winter, due to the low outside temperature, when there is water on the wall of the air intake shaft or the shaft environment is relatively humid, the low-temperature cold air entering the shaft is prone to freezing, which brings difficulties to lifting and transportation operations, threatens safe production, and worsens the underground climate conditions, affecting the health of workers.
[0003] In the related art, the anti-freezing measures of mines can be achieved by heating fresh air, which is generally achieved by using electric boilers or burning coal to heat the air, and then directly passing the heated high-temperature air into the mine. This method consumes a lot of energy and the temperature of the heated air is difficult to effectively control. Directly passing high-temperature air into the mine can easily cause personal injury. Utility Model Content
[0004] The purpose of the present disclosure is to provide a fresh air heating system for a mine, so as to at least partially solve the problems existing in the above-mentioned related technologies.
[0005] In order to achieve the above-mentioned objectives, the present disclosure provides a fresh air heating system for a mine, comprising: a heat storage unit, comprising a heat storage chamber and a heat storage body arranged inside the heat storage chamber; a heat exchange unit, comprising a heat exchange chamber, one side of the heat exchange chamber is provided with an air inlet, the side of the heat exchange chamber opposite to the air inlet is provided with an air outlet, a heat exchange pipeline is provided in the heat exchange chamber, and both ends of the heat exchange pipeline are respectively connected to the heat storage chamber; and an exhaust channel, the inlet of which is connected to the air outlet, and the outlet of the exhaust channel leads to a wellhead, wherein the outlet of the exhaust channel is butted against the gap between the wellhead.
[0006] Optionally, the heat exchange pipeline is configured as a meandering tube having a plurality of tortuous bends, and the meandering tube is configured so that an extension direction of the tube body is parallel to a flow direction of fresh air.
[0007] Optionally, the heat exchange pipeline includes: a first pipe opening, which passes through the top surface of the heat exchange cavity and is connected to the heat storage cavity; and a second pipe opening, which passes through the bottom surface of the heat exchange cavity and is connected to the heat storage cavity.
[0008] Optionally, a fluid medium is arranged in the heat exchange pipeline, and a driving component is arranged in the heat storage chamber, for driving the fluid medium to flow unidirectionally in the heat exchange pipeline.
[0009] Optionally, the heat exchange pipeline is a 304 stainless steel pipe, and there are multiple heat exchange pipelines, which are configured to be arranged at intervals along a direction perpendicular to the flow direction of the fresh air.
[0010] Optionally, the heat exchange unit further includes a fan, and an air supply side of the fan is arranged opposite to an air inlet of the heat exchange chamber.
[0011] Optionally, a porous plate is provided at the air inlet of the heat exchange chamber, and a plurality of groups of through holes are formed on the porous plate.
[0012] Optionally, the heat storage body is configured as a honeycomb structure stacked up by magnesia-alumina spinel bricks, and electric heating wires are arranged in the honeycomb gaps of the heat storage body.
[0013] Optionally, the exhaust passage is provided with a bending portion, and the area of the air outlet of the heat exchange cavity is larger than the area of the air inlet.
[0014] Optionally, a thermal insulation layer is provided on the outer surface of the exhaust passage.
[0015] Through the above technical scheme, the temperature of the fresh air can be increased in the heat exchange chamber first and then flow to the wellhead through the exhaust channel. The outlet of the exhaust channel is connected with the gap of the wellhead, so that the cold air can come into contact with the fresh air at the gap between the two, and be mixed into warm air of suitable temperature under the drive of the airflow and then enter the wellhead. The temperature of the fresh air is controllable as a whole, which saves costs, can effectively prevent the occurrence of freezing of the well and avoid the overheated fresh air from causing damage to the personnel in the well and the cables and optical fibers on the inner wall of the mine.
[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0018] Figure 1 It is a schematic structural diagram of a fresh air heating system for a mine according to an exemplary embodiment.
[0019] Description of Reference Numerals
[0020] 10 - heat storage unit, 20 - heat exchange unit, 21 - heat exchange chamber, 22 - air inlet, 23 - air outlet, 24 - fan, 25 - porous plate, 30 - heat exchange pipeline, 31 - first pipe opening, 32 - second pipe opening, 40 - exhaust channel, 50 - wellhead. DETAILED DESCRIPTION
[0021] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0022] In this disclosure, unless otherwise stated, directional words such as "top" and "bottom" refer to the top and bottom of the relevant components during actual use, and fresh air refers to the natural air outside the system. Figure 1 , the direction indicated by the arrow is the circulation direction of the fresh air, wherein the solid arrow indicates the circulation direction when the fresh air is outside the system, and the dotted arrow indicates the circulation direction when the fresh air is inside the system. In addition, the terms "first", "second", etc. used in this disclosure are to distinguish one element from another, and do not have order and importance.
[0023] The present disclosure provides a fresh air heating system for a mine, such as Figure 1 As shown, it includes a heat storage unit 10, a heat exchange unit 20 and an exhaust channel 40. The heat storage unit 10 may include a heat storage chamber and a heat storage body arranged inside the heat storage chamber, which is used to generate and store heat, and the heat exchange unit 20 may include a heat exchange chamber 21, wherein an air inlet 22 is provided on one side of the heat exchange chamber 21, and an air outlet 23 is provided on the other side relative to the air inlet 22, a heat exchange pipeline 30 is provided in the heat exchange chamber 21, and both ends of the heat exchange pipeline 30 are respectively connected to the heat storage chamber, which is used to exchange the heat of the heat storage body in the heat storage chamber to the heat exchange chamber 21, and the air outlet 23 of the heat exchange chamber 21 can be connected to the inlet of the exhaust channel 40, the outlet of the exhaust channel 40 can lead to the wellhead 50, and the outlet of the exhaust channel 40 can be connected to the gap between the wellhead 50.
[0024] In the above embodiment, the heat exchange pipeline 30 is arranged in the heat exchange cavity 21, and its two ends extend out of the heat exchange cavity 21 and are respectively connected with the heat storage cavity. The heat storage body in the heat storage unit 10 can both generate heat and store heat in the heat storage cavity, so that the heat in the heat storage cavity can be transported to the heat exchange cavity 21 through the heat exchange pipeline 30 for release. At the same time, the heat exchange chamber 21 is provided with an air inlet 22 and an air outlet 23 on opposite sides thereof. The low-temperature fresh air from the outside can enter the heat exchange chamber 21 from the air inlet 22, and after heat exchange with the heat released by the heat exchange pipeline 30, form fresh air with a high temperature, and enter the exhaust passage 40 through the air outlet 23, and then be guided to the wellhead 50 through the exhaust passage 40. The outlet of the exhaust passage 40 is connected with the gap between the wellhead 50. In the process of the high-temperature fresh air passing from the exhaust passage 40 into the wellhead 50, the low-temperature fresh air from the outside can be mixed with the high-temperature fresh air through the gap between the two to form warm fresh air with a suitable temperature and pass into the wellhead 50, so that the mixed warm fresh air can prevent the occurrence of the well freezing phenomenon, and is suitable for the underground working environment, avoiding interference to the underground workers. In this process, the temperature of the mixed warm fresh air can be 2°C or above.
[0025] Among them, the heat storage unit 10 can use a solid heat storage unit, and the heat storage body can be a honeycomb structure built of magnesium-aluminum spinel bricks, and electric heating wires can be arranged in the honeycomb gaps of the heat storage body. The unit can adopt a peak-valley-flat electricity policy to adjust the timing of power generation and storage. Specifically, the solid heat storage unit can use valley electricity when storing electricity, and increase the use of some flat electricity in severe cold weather. During the power-on period, the heat generated by the electric heating wire can be stored in the heat storage body while providing heat. During the non-power-on period, the heat in the heat storage body can be supplied to the heat exchange cavity 21 at a set temperature through the heat exchange pipeline 30, and since the two ends of the heat exchange pipeline 30 are respectively connected to the heat storage cavity, the heat can be kept circulating in the heat storage body and the heat exchange pipeline 30, and continuous heating is provided. Among them, the heat provided by the heat storage body in the heat exchange cavity 21 can make the low-temperature fresh air from the outside blow through the heat exchange pipeline 30 to generate high-temperature fresh air of 50-100°C, the heat exchange effect is good, and the heat exchange process is simple and convenient.
[0026] Through the above technical scheme, the temperature of the fresh air can be increased in the heat exchange chamber 21 first and then flow to the wellhead 50 through the exhaust channel 40. The outlet of the exhaust channel 40 is connected with the gap of the wellhead 50, so that the low-temperature fresh air from the outside can contact with the high-temperature fresh air in the gap between the two, and is mixed into warm fresh air with a suitable temperature under the drive of the airflow and then enters the wellhead 50. The fresh air temperature is controllable as a whole, which saves costs, can effectively prevent the occurrence of well freezing and avoid the overheated fresh air from causing harm to people in the well.
[0027] In some embodiments, Figure 1 As shown, the heat exchange pipeline 30 can be set as a meander tube with multiple tortuous bends, and the meander tube can be configured so that the extension direction of the tube body is parallel to the circulation direction of the fresh air. In this embodiment, the heat exchange pipeline 30 is set as a meander tube structure and has multiple tortuous bends, so that the effective heat exchange area can be increased as much as possible when the heat exchange pipeline 30 is arranged in the heat exchange cavity 21, and the heat can be retained for a long time when passing through the heat exchange pipeline 30, ensuring that the heat exchange pipeline 30 and the fresh air are fully in contact and heat exchange in the heat exchange cavity 21, effectively improving the heat exchange effect and heat utilization rate, and saving energy. At the same time, the extension direction of the tube body of the heat exchange pipeline 30 can be kept parallel to the circulation direction of the fresh air in the heat exchange cavity 21, so that the spatial arrangement of the heat exchange pipeline 30 will not hinder the circulation of the fresh air too much, and the fresh air can have good circulation in the heat exchange cavity 21, which is conducive to the continuous output of the fresh air in the system.
[0028] For example, Figure 1As shown, the heat exchange pipeline 30 may include a first pipe opening 31 and a second pipe opening 32. The first pipe opening 31 may pass through the top surface of the heat exchange cavity 21 and communicate with the heat storage cavity, and the second pipe opening 32 may pass through the bottom surface of the heat exchange cavity 21 and communicate with the heat storage cavity. In this embodiment, the first pipe opening 31 and the second pipe opening 32 may be fixedly connected to the top surface and the bottom surface of the heat exchange cavity 21, respectively, so that the portion of the heat exchange pipeline 30 located in the heat exchange cavity 21 can remain fixed, avoiding shaking under the blowing of fresh air, which affects the overall stability of the heat exchange pipeline 30.
[0029] In some embodiments, Figure 1 As shown, a fluid medium may be arranged in the heat exchange pipeline 30, and a driving component may be connected to the heat exchange pipeline 30 to drive the fluid medium to flow unidirectionally in the heat exchange pipeline 30. In this embodiment, the fluid medium may be a gaseous medium or a liquid medium. When the fluid medium is a gaseous medium, the driving component may be a fan, and when the fluid medium is a liquid medium, the driving component may be a liquid pump.
[0030] Among them, when the fluid medium is gaseous, the flow direction of the gaseous medium in the heat exchange pipeline 30 can be from the first pipe opening 31 to the second pipe opening 32. Since the high-temperature gaseous medium often escapes from a low place to a high place in a free state, by setting the gaseous medium from the first pipe opening 31 to the second pipe opening 32 in the opposite direction of free escape, the gaseous medium can be fully diffused in the heat exchange pipeline 30 and retained for a long time, thereby improving the heat exchange effect of the heat exchange pipeline 30 as a whole with the fresh air in the heat exchange cavity 21. In this process, the gaseous medium can be selected from air, which is convenient to obtain and low in cost.
[0031] When the fluid medium is liquid, the flow direction of the liquid medium in the heat exchange pipeline 30 can be from the second pipe opening 32 to the first pipe opening 31. Due to the gravity of the liquid medium in the air, the liquid medium flows from high to low. By setting the liquid medium from the second pipe opening 32 to the first pipe opening 31 in the opposite direction of free flow, the liquid medium can fill the heat exchange pipeline 30 as much as possible during circulation and fully exchange heat with the fresh air in the heat exchange cavity 21, thereby improving the heat exchange effect of the heat exchange pipeline 30. In this process, water can be used as the liquid medium, which is easy to obtain, low in cost, and has a better heat exchange effect than general gaseous media.
[0032] For example, Figure 1As shown, the heat exchange pipeline 30 can be a 304 stainless steel pipe, and the surface of the portion of the heat exchange pipeline 30 located between the heat exchange chamber 21 and the heat storage chamber can be provided with a heat insulation layer. Here, the portion provided with the heat insulation layer includes the connecting section between the first pipe opening 31 and the heat storage chamber, and the connecting section between the second pipe opening 32 and the heat storage chamber. Since in this embodiment, the heat exchange pipeline 30 itself is used for heat exchange, and the material of the heat exchange pipeline 30 is a 304 stainless steel pipe, the portion exposed to the outside is prone to heat loss. The provision of a heat insulation layer can effectively prevent heat from being lost when passing through this portion. At the same time, there is no need to transfer heat through a fluid medium in the heat exchange pipeline 30, which can further save costs.
[0033] According to some embodiments, the number of heat exchange pipelines 30 can be multiple, and the multiple heat exchange pipelines 30 can be configured to be arranged at intervals along a direction perpendicular to the flow of fresh air. When multiple heat exchange pipelines 30 are arranged in the heat exchange cavity 21, the contact area between the heat exchange pipeline 30 and the fresh air as a whole can be increased, further improving the heating effect of the fresh air, and multiple heat exchange pipelines 30 can be arranged at intervals along a direction perpendicular to the flow of fresh air, which will minimize the obstruction to the fresh air, avoid excessive interference with the fresh air, and facilitate the circulation of the fresh air in the heat exchange cavity 21.
[0034] In some embodiments, Figure 1 As shown, the heat exchange unit 20 may further include a fan 24, the air supply side of the fan 24 may be arranged opposite to the air inlet 22 of the heat exchange chamber 21, and the fan 24 drives the low-temperature fresh air from the outside into the heat exchange chamber 21, which may relatively increase the fresh air flow rate in the heat exchange chamber 21. At the same time, the driving force of the fan 24 may be adjusted to adjust the flow rate of the fresh air, thereby controlling the heat exchange time of the fresh air in the heat exchange chamber 21, so that the temperature of the output high-temperature fresh air may be effectively controlled.
[0035] For example, Figure 1 As shown, a porous plate 25 can be provided at the air inlet 22 of the heat exchange chamber 21. Multiple groups of through holes can be opened on the porous plate 25, which can effectively break up the fresh air flow, regulate the speed and pressure of the fresh air, increase the fresh air flow path, and provide good ventilation effect. At the same time, the porous structure can effectively absorb noise and improve the system operating environment.
[0036] According to some embodiments, the heat storage body can be configured as a honeycomb structure formed by stacking magnesia-alumina spinel bricks, and electric heating wires can be arranged in the honeycomb gaps of the heat storage body. Since the magnesia-alumina spinel structure has good high temperature resistance, corrosion resistance and wear resistance, it can ensure that the heat storage body can work stably under high temperature conditions and extend the service life of the heat storage body. The heat storage body is formed into a stacked honeycomb structure with stable structural strength, small size and light weight, which can effectively realize the lightweight design of the heat storage body while ensuring its structural stability. At the same time, the honeycomb pores of the honeycomb structure can increase the heat dissipation area, so that the heat storage body as a whole has a good heat dissipation effect, and the heat exchange efficiency of the heat storage body is improved.
[0037] In some embodiments, Figure 1 As shown, the exhaust passage 40 may be provided with a bending portion to slow down the flow rate of the high-temperature fresh air in the exhaust passage 40, so as to avoid the excessively high speed causing insufficient mixing with the low-temperature fresh air at the wellhead 50, and difficulty in reaching a reasonable temperature suitable for the underground working environment. At the same time, the outlet area of the heat exchange chamber 21 may be larger than the inlet area, so that the fresh air can slow down the flow rate in the heat exchange chamber 21, fully exchange heat with the heat exchange pipeline 30, and output the high-temperature fresh air with a relatively slow wind speed to the exhaust passage 40.
[0038] For example, a heat-insulating layer may be provided on the surface of the exhaust passage 40. Since the heat exchange unit 20 and the heat storage unit 10 may be arranged at a certain distance relative to the wellhead 50 according to the actual working environment, there may be heat loss when the high-temperature fresh air circulates in the exhaust passage 40 having a certain length. In order to make the temperature of the fresh air arriving at the outlet of the exhaust passage 40 within a preset range, so as to ensure that it can form fresh air that meets the temperature requirements of the well after mixing with the low-temperature fresh air at the wellhead 50, a heat-insulating layer may be provided on the outer wall of the exhaust passage 40 to reduce the heat loss of the high-temperature fresh air during the transmission process in the exhaust passage 40.
[0039] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0041] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A fresh air heating system for a mine, characterized in that: include: A heat storage unit, comprising a heat storage chamber and a heat storage body arranged inside the heat storage chamber; A heat exchange unit, comprising a heat exchange chamber, an air inlet being provided on one side of the heat exchange chamber, an air outlet being provided on a side of the heat exchange chamber opposite to the air inlet, a heat exchange pipeline being provided in the heat exchange chamber, and both ends of the heat exchange pipeline being respectively connected to the heat storage chamber; and An exhaust channel, an inlet of which is connected to the air outlet, and an outlet of the exhaust channel leads to the wellhead, wherein the outlet of the exhaust channel is butted against a gap between the wellhead.
2. The fresh air heating system for mines according to claim 1, characterized in that: The heat exchange pipeline is configured as a meandering tube with a plurality of tortuous bends, and the meandering tube is configured such that the extension direction of the tube body is parallel to the flow direction of the fresh air.
3. The fresh air heating system for mines according to claim 1, characterized in that: The heat exchange pipeline comprises: A first pipe opening, which passes through the top surface of the heat exchange chamber and communicates with the heat storage chamber; and The second pipe opening passes through the bottom surface of the heat exchange cavity and is communicated with the heat storage cavity.
4. The fresh air heating system for mines according to claim 3 is characterized in that: A fluid medium is arranged in the heat exchange pipeline, and a driving component is arranged in the heat storage chamber, which is used to drive the fluid medium to flow in one direction in the heat exchange pipeline.
5. The fresh air heating system for mines according to claim 1, characterized in that: The heat exchange pipeline is a 304 stainless steel pipe. There are multiple heat exchange pipelines, and the multiple heat exchange pipelines are configured to be arranged at intervals along a direction perpendicular to the flow direction of the fresh air.
6. The fresh air heating system for mines according to claim 1, characterized in that: The heat exchange unit further comprises a fan, and an air supply side of the fan is arranged opposite to an air inlet of the heat exchange chamber.
7. The fresh air heating system for mines according to claim 6, characterized in that: A porous plate is provided at the air inlet of the heat exchange chamber, and a plurality of groups of through holes are formed on the porous plate.
8. The fresh air heating system for mines according to claim 1, characterized in that: The heat storage body is configured as a honeycomb structure stacked with magnesia-alumina spinel bricks, and electric heating wires are arranged in the honeycomb gaps of the heat storage body.
9. The fresh air heating system for mines according to claim 1, characterized in that: The exhaust passage is provided with a bending portion, and the area of the air outlet of the heat exchange cavity is larger than the area of the air inlet.
10. The fresh air heating system for mines according to claim 1, characterized in that: The outer surface of the exhaust passage is provided with a heat-insulating layer.