Solar heat storage coupling split heat pipe and mine air inlet heating system

Abstract

The utility model relates to a solar heat storage coupling split heat pipe and a mine air inlet heating system, and belongs to the technical field of solar heat storage mine heat supply. The solar heat storage coupling split heat pipe is a heat storage type heat exchanger, can be buried in soil, is used in cooperation with a solar heat collector, and stores absorbed solar radiation energy in surrounding soil in a dividing wall heat exchange mode under the working condition of a non-heating season, so that a heat source guarantee is provided for subsequent heat supply. The mine air inlet heating system can be matched with the solar heat storage coupling split heat pipe, energy waste caused by high-temperature air supply is greatly reduced while reasonable allocation of heat energy is achieved, and the overall heat efficiency of the system is remarkably improved; the problems that according to an existing mine heat supply system, it is difficult to meet the mine air inlet heat supply working conditions that the distance between an air inlet shaft and an industrial square is long, a mine area lacks recyclable heat energy as a heat source support, the power distribution capacity is insufficient, and a coal heat supply mode is not suitable are solved.

Description

Technical Field

[0001] This utility model relates to the field of solar thermal storage mine heating technology, and in particular to a solar thermal storage coupled split heat pipe and mine air intake heating system. Background Technology

[0002] Mine heating is a construction technique that utilizes surface heat sources (such as boilers or heat pumps) to generate heat during mining operations. Heated air / hot water is then piped underground using fans or circulating water pumps and released through radiators or nozzles to compensate for heat loss and maintain a suitable underground temperature. Some systems incorporate waste heat recovery technologies (such as preheating fresh air from mine return air) to improve energy efficiency and ensure a safe and comfortable working environment. Due to its good environmental friendliness and heating efficiency, it is widely used in mining operations.

[0003] However, traditional mine heating systems currently face multiple constraints in terms of air intake heating in many mines:

[0004] 1. Traditional air intake shafts are far from the industrial site, resulting in long heat transmission paths and significant losses, making the deployment of heating systems more difficult and costly.

[0005] 2. Some mining areas lack common waste heat sources such as return air, drainage, and air compressors, and lack recoverable heat energy as a heat source support;

[0006] 3. Since mine construction is mostly carried out in the field, the power distribution capacity is limited and cannot effectively support the stable operation of electric heating equipment such as electric boilers or heat pump systems;

[0007] 4. Due to the current strict environmental protection policies, the use of traditional coal-fired boilers is restricted or prohibited, thus blocking the traditional path of relying on coal-fired heating.

[0008] The above factors have severely limited the selection of traditional mine heating systems. There is an urgent need to explore new thermal storage and heating solutions that are low-energy, low-pollution, do not rely on external power, and are adaptable to terrain distribution, in order to meet the basic heating needs of production and life, while achieving the goal of green and low-carbon development.

[0009] Therefore, this utility model proposes a solar thermal storage coupled split heat pipe and a mine air intake heating system to solve the above-mentioned problems existing in the existing mine heating system. Utility Model Content

[0010] In view of this, the main purpose of this utility model is to provide a solar thermal storage coupled split heat pipe and a mine intake air heating system to solve the problems of existing mine heating systems that are difficult to meet the working conditions of mine intake air heating, such as the long distance between the intake air shaft and the industrial area, the lack of recoverable heat energy as a heat source in the mining area, insufficient power distribution capacity, and the inapplicability of coal-fired heating.

[0011] To achieve the above objectives, the basic concept of the technical solution adopted by this utility model is as follows:

[0012] This utility model provides a first technical solution: a solar thermal storage coupled split heat pipe, wherein the solar thermal storage coupled split heat pipe is a thermal storage heat exchanger, and the thermal storage heat exchanger is provided with a non-connected heat storage chamber and a heat pipe evaporation chamber on its inner side. The heat storage chamber is located outside the heat pipe evaporation chamber, and a reflux working fluid storage tank is also provided in the heat pipe evaporation chamber. Each drain port on the side wall of the reflux working fluid storage tank is provided with a drain valve.

[0013] In a preferred embodiment, the inlet end of the heat storage chamber is connected to the ethylene glycol solution return pipe; the outlet end of the heat storage chamber is connected to the ethylene glycol solution supply pipe, and the other ends of both the ethylene glycol solution supply pipe and the ethylene glycol solution return pipe are connected to a solar collector.

[0014] In a preferred embodiment, a heat storage circulating water pump is provided on the ethylene glycol solution supply pipe.

[0015] This utility model provides a second technical solution: a mine air intake heating system, including a solar thermal storage coupled split heat pipe.

[0016] In a preferred embodiment, the mine air intake heating system further includes a heat pipe condenser, which is connected to the heat pipe evaporation chamber via a working fluid steam pipe; the heat pipe condenser is also connected to a temporary working fluid storage tank via a working fluid collection pipe, and the temporary working fluid storage tank is connected to a return working fluid storage tank via a working fluid return pipe.

[0017] In a preferred embodiment, the heat pipe condenser is also connected to one end of the air supply duct, and the other end of the air supply duct is connected to the air inlet room, which is located at the air inlet of the duct.

[0018] In a preferred embodiment, guide plates are symmetrically arranged inside the outer tank of the heat pipe condenser, forming an air guiding cavity between the outer tank and the guide plates. The air guiding cavity is a unidirectional flow cavity, and the air outlet end of the air guiding cavity is connected to the air supply duct.

[0019] In a preferred embodiment, a flow guide tank is further provided between two symmetrically arranged flow guide plates, forming a first working fluid flow guide cavity between the flow guide plates and the flow guide tank.

[0020] In a preferred embodiment, a working fluid guide port is further provided on the side wall of the guide tank, and the working fluid guide port is connected to the second working fluid guide cavity inside the guide tank.

[0021] In a preferred embodiment, an electric exhaust valve is provided on the working fluid steam pipe.

[0022] Compared with the prior art, this utility model provides a solar thermal storage coupled split heat pipe mine air intake heating system, which has the following beneficial effects:

[0023] 1. Through the structural design of the solar thermal storage coupled split heat pipe, it can be buried in the soil and used in conjunction with solar collectors. During the non-heating season, the absorbed solar radiation energy is stored in the surrounding soil through heat exchange between the partition walls, providing a heat source guarantee for subsequent heating. This effectively solves the problems of existing mine heating systems, such as the lack of recoverable heat energy as a heat source in the mining area and the inapplicability of coal-fired heating in mine intake heating conditions.

[0024] 2. By installing a mine intake air heating system, coupled with solar thermal storage and split heat pipes, energy waste caused by high-temperature air supply is significantly reduced while achieving rational heat distribution, thus significantly improving the overall thermal efficiency of the system. This system is suitable for mine intake air heating conditions where the intake shaft is far from the industrial area, the mine lacks recoverable heat energy as a heat source, power distribution capacity is insufficient, and traditional coal-fired heating methods are unsuitable. Furthermore, its low-carbon, energy-saving, and safe operating characteristics provide a clean and sustainable alternative for mine heating, especially suitable for mining areas lacking traditional waste heat sources, with limited power resources, and constrained by environmental policies.

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the solar thermal storage coupled split heat pipe mine air intake heating system of this utility model;

[0028] Figure 2 This is a cross-sectional view of the heat storage heat exchanger of this utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the heat pipe condenser of this utility model;

[0030] Figure 4 This utility model Figure 3 Sectional view at point AA;

[0031] Figure 5 This utility model Figure 3 Sectional view at point BB.

[0032] [Explanation of Key Component Symbols]

[0033] 1. Thermal storage heat exchanger; 2. Solar collector; 3. Heat pipe condenser; 4. Air supply duct; 5. Air inlet chamber; 6. Temporary working fluid storage tank; 7. Thermal storage circulating water pump; 8. Working fluid return pipe; 9. Working fluid manifold; 10. Working fluid steam pipe; 11. Ethylene glycol solution supply pipe; 12. Ethylene glycol solution return pipe; 13. Heat storage chamber; 14. Reflux working fluid storage tank; 15. Electric exhaust valve; 16. Heat pipe evaporation chamber; 17. Drain valve; 8. Shaft; 19. Air inlet interface; 20. Air outlet interface; 21. Air guide cavity; 22. Guide plate; 23. Guide tank; 24. First working fluid guide cavity; 25. Working fluid inlet interface; 26. Second working fluid guide cavity; 27. Positioning ring; 28. Working fluid guide port; 29. ​​Guide channel; 30. Working fluid outlet interface; 31. Ethylene glycol inlet; 32. Working fluid interface; 33. Working fluid return interface; 34. Ethylene glycol outlet. Detailed Implementation

[0034] The structure of this solar thermal storage coupled split heat pipe and mine air intake heating system will be further described in detail below with reference to the accompanying drawings and embodiments of this utility model.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 9 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] The following is combined Figures 1 to 5 This invention describes a solar thermal storage coupled split heat pipe and a mine air intake heating system.

[0040] Example 1:

[0041] Please refer to the attached instruction manual. Figure 1 and attached Figure 2 As shown, this embodiment provides a solar thermal storage coupled split heat pipe, which is a thermal storage heat exchanger 1. The thermal storage heat exchanger 1 has a columnar tank structure. Inside the thermal storage heat exchanger 1, there are a heat storage chamber 13 and a heat pipe evaporation chamber 16 that are not connected to each other. The heat storage chamber 13 is located outside the heat pipe evaporation chamber 16, and a sleeve that plays a role in heat conduction is provided between the heat storage chamber 13 and the heat pipe evaporation chamber 16. The heat storage chamber 13 and the heat pipe evaporation chamber 16 are separated by the sleeve.

[0042] Specifically, such as Figure 2As shown, the heat storage heat exchanger 1 is buried in the soil during use. Its outer wall serves as a solid partition, isolating the heat carrier from the soil. Heat carried by the high-temperature ethylene glycol is transferred through the outer wall of the heat storage heat exchanger 1 to the low-temperature soil side via thermal conduction. This allows heat to accumulate primarily in the surrounding area of ​​the heat storage heat exchanger 1, forming a distributed heat storage layer in the soil. When heating is needed, the low-temperature heat carrier flows back into the pipeline, absorbing the heat stored in the soil through the partition, and then transporting it to the heat-consuming end. The soil temperature gradually decreases due to heat release, but the temperature of the heat storage body can be maintained through intermittent heat replenishment, achieving a cycle of "heat charging-heat storage-heat release".

[0043] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, one end of the heat storage chamber 13 is connected to the ethylene glycol solution return pipe 12 via an ethylene glycol inlet 31 located on the outer wall of the heat storage heat exchanger 1, for introducing ethylene glycol into the heat storage chamber 13 through the ethylene glycol solution return pipe 12; one end of the heat storage chamber 13 is connected to the ethylene glycol solution supply pipe 11 via an ethylene glycol outlet 34 located on the outer wall of the heat storage heat exchanger 1, so that the ethylene glycol solution inside the heat storage chamber 13 can be replaced under the action of the heat storage circulating water pump 7 during use, ensuring the heating effect.

[0044] Specifically, such as Figure 1 and Figure 2 As shown, the thermal storage circulating water pump 7 is installed on the ethylene glycol solution supply pipe 11 to provide power for liquid exchange of the ethylene glycol solution. The other ends of the ethylene glycol solution supply pipe 11 and the ethylene glycol solution return pipe 12 are both connected to the solar collector 2, which is used to heat the glycol solution during use.

[0045] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the heat pipe evaporation chamber 16 is connected to the working fluid interface 32 located on the outer wall of the heat storage heat exchanger 1. During operation, the high-temperature ethylene glycol solution in the heat storage chamber 13 heats the liquid working fluid in the heat pipe evaporation chamber 16, causing it to vaporize and exit through the working fluid interface 32. After the temperature of the ethylene glycol solution in the heat storage chamber 13 decreases, it can be recirculated back to the solar collector 2 by the heat storage circulating water pump 7 for reheating, repeating this cycle to form a stable heat source.

[0046] In a preferred embodiment, such as Figure 1 and Figure 2As shown, a reflux working fluid storage tank 14 is also installed in the heat pipe evaporation chamber 16. The reflux working fluid storage tank 14 is connected to the working fluid reflux interface 33 set on the outer wall of the heat storage heat exchanger 1, and a drain valve 17 is provided on several drain ports on the side wall of the reflux working fluid storage tank 14.

[0047] The operating principle of the solar thermal storage coupled split heat pipe described in this embodiment includes:

[0048] During the non-heating season, the solar collector 2 absorbs solar radiation and transfers the heat to the ethylene glycol solution inside. Driven by the thermal storage circulating water pump 7, the heated ethylene glycol solution is transported through the ethylene glycol solution return pipe 12 to the heat storage chamber 13 of the thermal storage heat exchanger 1. The heat storage chamber 13 transfers heat to the surrounding soil through indirect heat exchange, achieving long-term storage of thermal energy. During the heating season, the system operates in the same manner as in the non-heating season, continuing to store thermal energy through a combination of solar thermal collection and soil thermal storage, providing a heat source guarantee for subsequent heating.

[0049] It effectively solves the problems of existing mine heating systems, such as the lack of recoverable heat energy in mining areas as a heat source and the inapplicability of coal-fired heating methods to mine intake air heating conditions.

[0050] Example 2:

[0051] Please refer to the attached instruction manual. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, unlike Embodiment 1, this embodiment provides a mine intake air heating system, which includes a solar thermal storage coupled split heat pipe as described in Embodiment 1. It also includes a heat pipe condenser 3 and a temporary working fluid storage tank 6. The working fluid inlet 25 of the heat pipe condenser 3 is connected to the working fluid inlet 32 ​​via a working fluid steam pipe 10. The working fluid outlet 30 of the heat pipe condenser 3 is connected to the temporary working fluid storage tank 6 via a working fluid collection pipe 9. The working fluid liquid outlet of the temporary working fluid storage tank 6 is connected to the working fluid liquid return outlet 33 of the thermal storage heat exchanger 1 via a working fluid return pipe 8. This forms an evaporation-condensation cycle, in which the liquid working fluid absorbs and stores heat in the heat exchanger 1, vaporizes, enters the heat pipe condenser 3 through the working fluid vapor pipe 10 to release heat and condense, exchanges heat with the flowing air in the heat pipe condenser 3, releases heat and condenses into liquid, flows back to the temporary working fluid storage tank 6 through the working fluid collection pipe 9, and finally returns to the heat exchanger 1 through the working fluid return pipe 8 to be reheated and vaporized, forming a continuous phase change cycle. The air exhaust port 20 of the heat pipe condenser 3 is connected to one end of the air supply duct 4, and the other end of the air supply duct 4 is connected to the air intake room 5, which is installed at the air inlet of the shaft 18. In use, cold air from outside the air intake room 5 enters the heat pipe condenser 3 through the air inlet port 19 for heat exchange and heating. After being heated, the air is then sent into the shaft 18 through the air supply duct 4 and the air intake room 5, realizing solar-driven heating for mine air intake. This system achieves efficient long-distance heat energy transmission through a split-type heat pipe design, and combined with a thermal storage device, it solves the problem of intermittent solar energy, ensuring the stability of mine heating.

[0052] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, control valves are installed on the working fluid return pipe 8, working fluid manifold 9, ethylene glycol solution supply pipe 11, and ethylene glycol solution return pipe 12 to control the opening and closing of the pipes. An electric exhaust valve 15 is also installed on the working fluid vapor pipe 10 to control the exhaust of the working fluid vapor pipe 10 during use.

[0053] In a preferred embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, guide plates 22 are symmetrically arranged inside the outer tank of the heat pipe condenser 3, forming an air guiding cavity 21 between the outer tank and the guide plates 22. The air inlet end of the air guiding cavity 21 is connected to the air inlet interface 19 on the outer tank wall, and the air outlet end of the air guiding cavity 21 is connected to the air outlet interface 20 on the outer tank wall. The guide plates 22 are symmetrically welded to the inner side of the outer tank, and transition steel plates are provided at both ends of the guide plates 22 to connect the ends of the two guide plates 22. A sealing plate is welded to the end of the upper guide plate 22 near the air inlet interface 19 and connected to the inner wall of the outer tank of the heat pipe condenser 3, so that the air guiding cavity 21 is a cavity that can guide air in one direction. During the flow of air from the air inlet interface 19 into the air guiding cavity 21 until it passes through the air outlet interface 20, the air can be heated inside the air guiding cavity 21.

[0054] In a preferred embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a guide tank 23 is installed between the two symmetrically arranged guide plates 22 via a positioning ring 27, forming a first working fluid guide cavity 24 between the guide plates 22 and the guide tank 23. A working fluid guide port 28 is also provided on the side wall of the guide tank 23, which communicates with the second working fluid guide cavity 26 inside the guide tank 23. The first working fluid air guide cavity 21 and the second working fluid guide cavity 26 are connected through the working fluid guide port 28. The first working fluid air guide cavity 21 is connected to the working fluid inlet port 25, and the second working fluid guide cavity 26 is connected to the working fluid outlet port 30. This is used to heat the external air by utilizing the flow of the working fluid in the first working fluid guide cavity 24 and the second working fluid guide cavity 26 during use.

[0055] In a preferred embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the positioning ring 27 is used to fix the flow guide tank 23 between the two flow guide plates 22, and a plurality of flow guide channels 29 are provided on the positioning ring 27 to connect the first working fluid air flow guide chambers 21 on both sides, so as to ensure the smooth flow of the working fluid in the first working fluid air flow guide chambers 21.

[0056] The usage process and operating principle of the mine air intake heating system described in this embodiment include:

[0057] During the heating season, when the heat is released, the working fluid in the heat pipe condenser 3 is in a saturated vapor state. Therefore, when the outdoor temperature is below 2℃ (that is, when the air temperature flowing into the air guide cavity 21 is below 2℃), the saturated working fluid vapor liquefies upon cooling, releasing a large amount of heat. This heat is then used to heat the outdoor fresh air through the heat pipe condenser 3. The fresh air is then transported to the air intake room 5 through the air supply duct 4, thus heating the air entering the well.

[0058] After liquefaction, the working fluid flows through the working fluid manifold 9 into the temporary working fluid storage tank 6. Under the action of gravity, it flows into the return working fluid storage tank 14 through the working fluid return pipe 8. Due to the liquefaction of the working fluid in the heat pipe condenser 3, the internal pressure of the system decreases, and a pressure difference is formed between the working fluid vapor pipe 10 and the heat pipe evaporation chamber 16. At this time, the drain valve 17 automatically opens, allowing the working fluid in the return working fluid storage tank 14 to flow into the heat pipe evaporation chamber 16. Under the heating action of the ethylene glycol solution in the heat storage chamber 13, the working fluid vaporizes again and is transported to the heat pipe condenser 3 through the working fluid vapor pipe 10, realizing a continuous heat exchange cycle.

[0059] When the air supply temperature is higher than the set value, the electric exhaust valve 15 automatically closes to stop heat release; when the air supply temperature is lower than the set value, the electric exhaust valve 15 gradually opens to precisely control heat release and ensure that the air supply temperature remains stable within a safe range to meet the ventilation and heating needs of the mine.

[0060] It should be noted that the solar collector 2, the temporary storage medium tank 6, the thermal storage circulating water pump 7, the electric exhaust valve 15, the drain valve 17, etc. are all existing technologies known to those skilled in the art, and the specific models and power supply methods can be selected according to specific needs, which will not be elaborated here.

[0061] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A solar heat storage coupled split heat pipe, characterized in that: The solar heat storage coupling split heat pipe is a heat storage heat exchanger (1), an unconnected heat storage cavity (13) and a heat pipe evaporation cavity (16) are arranged in the heat storage heat exchanger (1), the heat storage cavity (13) is located outside the heat pipe evaporation cavity (16), and a reflux working medium storage tank (14) is further arranged in the heat pipe evaporation cavity (16), and a drain valve (17) is arranged on a drain port on a side wall of the tank body of the reflux working medium storage tank (14).

2. The solar heat storage coupled split heat pipe of claim 1, wherein: An inlet end of the heat storage cavity (13) is communicated with a glycol solution return pipe (12); an outlet end of the heat storage cavity (13) is communicated with a glycol solution supply pipe (11), and the other ends of the glycol solution supply pipe (11) and the glycol solution return pipe (12) are connected with a solar heat collector (2).

3. The solar heat storage coupled split heat pipe of claim 2, wherein: The glycol solution supply pipe (11) is provided with a heat storage circulating water pump (7).

4. A mine air intake heating system characterized by: The solar heat storage coupling split heat pipe comprises the heat storage heat exchanger (1) according to any one of claims 1-3.

5. A mine air intake heating system as claimed in claim 4 wherein: The mine air inlet heating system further comprises a heat pipe condenser (3), the heat pipe condenser (3) is communicated with the heat pipe evaporation cavity (16) through a working medium steam pipe (10), the heat pipe condenser (3) is further connected with a temporary working medium storage tank (6) through a working medium collecting pipe (9), and the temporary working medium storage tank (6) is connected with the reflux working medium storage tank (14) through a working medium return pipe (8).

6. A mine air intake heating system as claimed in claim 5 wherein: One end of the heat pipe condenser (3) is connected with a supply air duct (4), the other end of the supply air duct (4) is connected with an air inlet shaft house (5), and the air inlet shaft house (5) is arranged at an air inlet of a shaft (18).

7. A mine air intake heating system as claimed in claim 5 wherein: Symmetrical guide plates (22) are arranged in the outer tank body of the heat pipe condenser (3), an air guide cavity (21) is formed between the outer tank body and the guide plates (22), the air guide cavity (21) is a one-way guide cavity, and an air outlet end of the air guide cavity (21) is connected with the supply air duct (4).

8. A mine air intake heating system as claimed in claim 5 wherein: A guide tank (23) is further arranged between the two symmetrical guide plates (22), and a first working medium guide cavity (24) is formed between the guide plates (22) and the guide tank (23).

9. A mine air intake heating system as claimed in claim 8 wherein: A working medium guide port (28) is further arranged on a side wall of the guide tank (23), and the working medium guide port (28) is communicated with a second working medium guide cavity (26) in the guide tank (23).

10. A mine air intake heating system as claimed in claim 5 wherein: An electric exhaust valve (15) is arranged on a pipeline of the working medium steam pipe (10).

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