Roadway air heating heat recovery system

Abstract

The utility model relates to a laneway air heating heat recovery system, which comprises a fresh air heating assembly, a first liquid coil pipe and a first fan, the fresh air heating assembly comprises an air inlet, a first liquid coil pipe and a first fan, the first liquid coil pipe is positioned between the air inlet and the first fan, the output end of the first fan is used for being communicated with an inlet of a laneway, and the air inlet is provided with a first temperature sensing piece connected with a controller; the ventilation air methane heat recovery assembly comprises an air collecting opening, a second liquid coil pipe and a second fan, the air collecting opening is used for being communicated with an outlet of the roadway, the second liquid coil pipe is located between the air collecting opening and the second fan, the first liquid coil pipe is provided with a second temperature sensing piece connected with the controller, and a first flow channel and a second flow channel are connected between the first liquid coil pipe and the second liquid coil pipe; the first flow channel is provided with a first three-way valve; the second flow channel is provided with a second three-way valve and a driving pump; and the deep heat recovery assembly is connected between the first three-way valve and the second three-way valve. According to the utility model, resource consumption can be reduced, and atmospheric pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air heating and heat recovery, in particular to a shaft air heating heat recovery system. Background Art

[0002] Coal mines and other tunnels usually need to be ventilated to prevent excessive gas concentrations. During the ventilation process, a large amount of fresh air needs to enter and a large amount of exhausted air needs to be exhausted. Some mines in the north have low ambient temperatures in winter. In order to prevent low-temperature fresh air from entering the tunnels and forming ice, the fresh air usually needs to be heated. Currently, fresh air is mainly heated by coal-fired boilers or electrically. These two heating methods consume a lot of electricity or coal economically, and coal-fired boilers also have environmental problems such as air pollution, which do not meet the requirements of energy conservation and emission reduction. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to provide a shaft and tunnel air heating heat recovery system, which can reduce resource consumption and reduce air pollution.

[0004] To solve the above technical problems, the utility model provides a mine air heating heat recovery system, including: a fresh air heating component, including an air inlet, a first liquid coil and a first fan, the first liquid coil is located between the air inlet and the first fan, the output end of the first fan is used to communicate with the entrance of the tunnel, and the air inlet is provided with a first temperature sensor connected to a controller; an exhaust air heat recovery component, including an air receiving port, a second liquid coil and a second fan, the air receiving port is used to communicate with the outlet of the tunnel, the second liquid coil is located between the air receiving port and the second fan, the first liquid coil is provided with a second temperature sensor connected to the controller, a first flow channel and a second flow channel are connected between the first liquid coil and the second liquid coil, the first flow channel is provided with a first three-way valve, and the second flow channel is provided with a second three-way valve and a driving pump; a deep heat recovery component, the deep heat recovery component is connected between the first three-way valve and the second three-way valve.

[0005] In one embodiment of the present invention, the deep heat recovery component includes a heat exchanger, and the heat exchanger is connected between the first three-way valve and the second three-way valve.

[0006] In one embodiment of the utility model, the deep heat recovery component also includes a compressor, a gas-liquid separator and an evaporator, the compressor is connected to the heat exchanger and the gas-liquid separator, the gas-liquid separator is connected to the evaporator, and the evaporator is connected to the heat exchanger.

[0007] In one embodiment of the present invention, a throttling device is connected between the evaporator and the heat exchanger.

[0008] In one embodiment of the present invention, fins are provided on the surfaces of the first liquid coil, the second liquid coil and the evaporator.

[0009] In one embodiment of the present invention, the heat exchanger is provided with a third temperature sensor connected to the controller.

[0010] In one embodiment of the present invention, the deep heat recovery component is located between the second liquid coil and the second fan.

[0011] In one embodiment of the present invention, a pressure stabilizing tank is provided between the second three-way valve and the second liquid coil.

[0012] In one embodiment of the present utility model, a first filter is provided between the first liquid coil and the air inlet, and the first filter is connected to a first sand discharge pipe.

[0013] In one embodiment of the present invention, a second filter is provided between the second liquid coil and the air receiving port, and the second filter is connected to a second sand discharge pipe.

[0014] The above technical solution of the utility model has the following advantages compared with the prior art:

[0015] The utility model discloses a heat recovery system for heating tunnel air, which can stabilize the temperature of fresh air within the set value range through heat recovery of exhaust air and heating of deep heat recovery components, and can reduce heat waste through heat recovery of exhaust air, so that the deep heat recovery components do not need to consume a large amount of resources for heating, thereby reducing resource consumption and reducing air pollution. The exhaust air will also exchange heat with the evaporator in the process of passing through the evaporator, which can improve the heating effect of the compressor in a low temperature environment and also utilize the heat of the exhaust air. Different working modes are used for different fresh air temperatures to ensure that fresh air is continuously input into the tunnel, and the fresh air will not cause ice inside the tunnel, and both working modes recycle the heat of the exhaust air, thereby improving resource utilization and reducing heat waste and resource consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0017] Figure 1 This is a structural schematic diagram of a shaft and tunnel air heating heat recovery system of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the fresh air heating component;

[0019] Figure 3It is a schematic diagram of the structure of the exhaust air heat recovery component and the deep heat recovery component;

[0020] Figure 4 yes Figure 1 Flowchart of the process.

[0021] Explanation of the reference numerals in the drawings in the specification: 1. Fresh air heating component; 2. Exhaust air heat recovery component; 3. Deep heat recovery component; 4. First flow channel; 5. Second flow channel; 6. Laneway; 11. Air inlet; 12. First fan; 13. First temperature sensor; 14. First filter; 15. First sand removal pipe; 16. First liquid coil; 17. Second temperature sensor; 21. Air receiving port; 22. Second fan; 23. Second filter; 24. Second sand removal pipe; 25. Second liquid coil; 31. Compressor; 32. Gas-liquid separator; 33. Evaporator; 34. Heat exchanger; 35. Third temperature sensor; 36. Throttle; 41. First three-way valve; 51. Drive pump; 52. Second three-way valve. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0023] Reference Figures 1 to 4 As shown, a heat recovery system for heating air in a well tunnel of the utility model comprises: a fresh air heating component 1, comprising an air inlet 11, a first liquid coil 16 and a first fan 12, wherein the first liquid coil 16 is located between the air inlet 11 and the first fan 12, and the output end of the first fan 12 is used to communicate with the entrance of the tunnel 6, and the air inlet 11 is provided with a first temperature sensor 13 connected to a controller, and the first temperature sensor 13 is used to detect the temperature of the fresh air at the air inlet position; an exhaust air heat recovery component 2, comprising an air receiving port 21, a second liquid coil 25 and a second fan 22, wherein the air receiving port 21 is used to communicate with the outlet of the tunnel 6, and the second liquid coil 25 is located between the air receiving port 21 and the second fan 22 The first liquid coil 16 is provided with a second temperature sensor 17 connected to the controller, and the second temperature sensor 17 is used to detect the temperature of the liquid in the first liquid coil 16. A first flow channel 4 and a second flow channel 5 are connected between the first liquid coil 16 and the second liquid coil 25. The first flow channel 4 is provided with a first three-way valve 41, and the second flow channel 5 is provided with a second three-way valve 52 and a driving pump 51. The first three-way valve 41, the second three-way valve 52 and the driving pump 51 are all electrically connected to the controller and can be controlled by the controller; a deep heat recovery component 3, the deep heat recovery component 3 is connected between the first three-way valve 41 and the second three-way valve 52, and the deep heat recovery component 3 is used to heat the liquid in the first liquid coil 16.

[0024] The utility model is a heat recovery system for heating tunnel air. Under the action of the first fan 12 and the second fan 22, fresh air enters the tunnel 6 from the air inlet 11, and the air becomes exhaust air after circulating in the tunnel 6 and is discharged from the air receiving port 21. After the exhaust air is discharged from the air receiving port 21, it exchanges heat with the second liquid coil 25, thereby increasing the temperature of the liquid in the second liquid coil 25. The liquid in the second liquid coil 25 flows into the first liquid coil 16 through the second flow channel 5. After the fresh air enters from the air inlet 11, it exchanges heat with the first liquid coil 16, thereby increasing the temperature of the fresh air, and the temperature of the liquid in the first liquid coil 16 decreases. The liquid with decreased temperature flows into the second liquid coil 25 through the first flow channel 4, thereby forming a cycle. When the first temperature sensor 13 and the second temperature sensor 17 detect that the temperature is lower than the set value, the first three-way valve 41 and the second three-way valve 52 are opened, and the deep heat recovery component 3 is started at the same time. The temperature of the liquid in the first flow channel 4 increases after passing through the deep heat recovery component 3, and the liquid with increased temperature enters the first liquid coil 16 through the second flow channel 5, thereby increasing the temperature of the fresh air. The utility model provides a heat recovery system for heating and recovering air from exhaust air and heating the deep heat recovery component 3, so that the temperature of the fresh air can be stabilized within the set value range, and the heat recovery of the exhaust air can reduce heat waste, so that the deep heat recovery component 3 does not need to consume a lot of resources for heating, thereby reducing resource consumption and reducing air pollution.

[0025] The fresh air heating assembly 1 includes an air inlet 11, a first liquid coil 16 and a first fan 12. The first liquid coil 16 is located between the air inlet 11 and the first fan 12. The output end of the first fan 12 is used to communicate with the entrance of the lane 6. The input end of the first fan 12 is connected to the outside. The first fan 12 drives the outside air to flow into the fresh air heating assembly 1 to form fresh air. When the fresh air passes through the first liquid coil 16, it exchanges heat with the first liquid coil 16, thereby increasing the temperature of the fresh air. Preferably, fins are provided on the surface of the first liquid coil 16, so that the heat exchange efficiency between the first liquid coil 16 and the fresh air is higher. Preferably, a first filter 14 is provided between the first liquid coil 16 and the air inlet 11, and the first filter 14 is connected to a first sand removal pipe 15. The first filter 14 is used to filter sand and dust in the fresh air, thereby protecting the cleanliness of the surface of the first liquid coil 16 and preventing the sand and dust from covering the surface of the first liquid coil 16 and causing the heat exchange efficiency to decrease. The first sand removal pipe 15 is connected to the outside, and the sand and dust in the first filter 14 are discharged to the outside through the first sand removal pipe 15. A shell is provided on the outside of the fresh air heating component 1, and the shell has the function of blocking sand and dust and keeping warm. The air inlet 11 is provided with a first temperature sensor 13 connected to the controller, and the controller can detect the temperature of the fresh air at the air inlet position through the first temperature sensor 13.

[0026] The exhaust air heat recovery component 2 includes an air receiving port 21, a second liquid coil 25, and a second fan 22. The air receiving port 21 is used to communicate with the outlet of the lane 6. The second liquid coil 25 is located between the air receiving port 21 and the second fan 22. The air in the lane 6 is discharged from the air receiving port 21 after becoming exhaust air. When the exhaust air passes through the first liquid coil 16, it exchanges heat with the second liquid coil 25, thereby reducing the exhaust air temperature and increasing the liquid temperature in the second liquid coil 25, thereby completing the heat recovery. The output end of the second fan 22 is connected to the outside. Preferably, fins are provided on the surface of the second liquid coil 25, so that the heat exchange efficiency between the second liquid coil 25 and the exhaust air is higher. Preferably, a second filter 23 is provided between the second liquid coil 25 and the air receiving port 21, and the second filter 23 is connected to a second sand discharge pipe 24. The second filter 23 and the second sand discharge pipe 24 have the same structure and function as the first filter 14 and the first sand discharge pipe 15, and will not be repeated. A shell is provided on the outside of the exhaust air heat recovery component 2, and the shell has the function of blocking sand and dust and keeping warm. The first liquid coil 16 is provided with a second temperature sensor 17 connected to the controller, and the controller can detect the temperature in the first liquid coil 16 through the second temperature sensor 17. Preferably, a temperature sensor can be provided at the air receiving port 21 to detect the temperature of the exhaust air at the air receiving port 21. The first flow channel 4 and the second flow channel 5 are connected between the first liquid coil 16 and the second liquid coil 25. The two ends of the first flow channel 4 are respectively connected to the outlet of the first liquid coil 16 and the inlet of the second liquid coil 25, and are used to transport the liquid with a lower temperature in the first liquid coil 16. The two ends of the second flow channel 5 are respectively connected to the inlet of the first liquid coil 16 and the outlet of the second liquid coil 25, and are used to transport the liquid with a higher temperature in the second liquid coil 25. The first flow channel 4 is provided with a first three-way valve 41, and the second flow channel 5 is provided with a second three-way valve 52 and a driving pump 51. Specifically, the second three-way valve 52 is located between the driving pump 51 and the second liquid coil 25, and the driving pump 51 is used to drive the liquid in the first flow channel 4 and the second flow channel 5 to form a circulation. Preferably, a pressure stabilizing tank is provided in the passage between the second three-way valve 52 and the second liquid coil 25 .

[0027] The deep heat recovery component 3 includes a compressor 31, a gas-liquid separator 32, an evaporator 33, a heat exchanger 34 and a throttle 36. Specifically, the heat exchanger 34 is connected between the first three-way valve 41 and the second three-way valve 52. The heat exchanger 34 is used for the deep heat recovery component 3 to exchange heat with the liquid in the first flow channel 4. The compressor 31 is connected to the heat exchanger 34 and the gas-liquid separator 32. The gas-liquid separator 32 is connected to the evaporator 33. The evaporator 33 is connected to the heat exchanger 34. The throttle 36 is connected between the evaporator 33 and the heat exchanger 34. The compressor 31 compresses the low-pressure gas into high-temperature and high-pressure gas, and then heats the liquid in the first flow channel 4 through the heat exchanger 34. At the same time, the high-temperature and high-pressure gas is cooled by the heat exchanger 34 and becomes liquid. The liquid enters the evaporator 33 for evaporation and then passes through the throttle 36 and the gas-liquid separator 32 to become low-temperature and low-pressure gas. The low-temperature and low-pressure gas enters the compressor 31 again to form a cycle. Preferably, the surface of the evaporator 33 is provided with fins. Preferably, the deep heat recovery component 3 is located between the second liquid coil 25 and the second fan 22, so that the exhaust air can exchange heat with the evaporator 33 during the process of being discharged to the outside by the second fan 22, thereby improving the utilization rate of the exhaust air heat. Preferably, the heat exchanger 34 is provided with a third temperature sensor 35 connected to the controller, and the controller can detect the temperature in the heat exchanger 34 through the third temperature sensor 35.

[0028] When in use, the first fan 12 drives the outside air to form fresh air, and the fresh air enters the tunnel 6 through the fresh air heating component 1. After circulating in the tunnel 6, the air becomes exhaust air and is discharged from the air receiving port 21. After passing through the exhaust air heat recovery component 2, the exhaust air is finally discharged to the outside by the second fan 22. When the first temperature sensor 13 and the second temperature sensor 17 detect the temperature input to the controller, the controller calculates that the fresh air can reach a set temperature above, for example, 2°C, after exchanging heat with the first liquid coil 16, the exhaust air is discharged from the air receiving port 21 and exchanges heat with the second liquid coil 25, thereby increasing the temperature of the liquid in the second liquid coil 25. The liquid with increased temperature in the second liquid coil 25 flows into the first liquid coil 16 through the second flow channel 5. After the fresh air enters the fresh air heating component 1 through the air inlet 11, it exchanges heat with the first liquid coil 16, thereby increasing the temperature of the fresh air, and the temperature of the liquid in the first liquid coil 16 decreases. The liquid with decreased temperature flows into the second liquid coil 25 through the first flow channel 4, thereby forming a cycle. After entering the tunnel 6, the fresh air gradually exchanges heat with the ground heat and gradually becomes exhaust air. After becoming exhaust air, it is discharged from the air receiving port 21. At this time, the exhaust air temperature is relatively high and exchanges heat with the second liquid coil 25 again, thus forming a cycle. When the first temperature sensor 13 and the second temperature sensor 17 detect the temperature input to the controller, the controller calculates that the fresh air cannot reach a set temperature above, for example, 2°C, after exchanging heat with the first liquid coil 16. At this time, the first three-way valve 41 and the second three-way valve 52 are opened, and the deep heat recovery component 3 is started at the same time. The deep heat recovery component 3 heats through the compressor 31. The temperature of the liquid in the first flow channel 4 increases after passing through the heat exchanger 34. The liquid with increased temperature enters the first liquid coil 16 through the second flow channel 5, thereby raising the temperature of the fresh air to the set range. When the controller calculates that the temperature of the heated air is too high, the drive pump 51 stops working. At this time, the temperature of the fresh air is relatively high, and the temperature in the tunnel 6 can be maintained without the fresh air heating component 1 and the deep heat recovery component 3. When the temperature in the lane 6 is high, the compressor 31 of the deep heat recovery component 3 can also be used for cooling, thereby reducing the temperature of the fresh air and further reducing the temperature in the lane 6.

[0029] The utility model provides a heat recovery system for heating tunnel air. By recovering the heat of exhaust air and heating the deep heat recovery component 3, the temperature of fresh air can be stabilized within the set value range. The heat recovery of exhaust air can reduce heat waste, so that the deep heat recovery component 3 does not need to consume a large amount of resources for heating, thereby reducing resource consumption. The exhaust air will also exchange heat with the evaporator 33 in the process of passing through the evaporator 33, which can improve the heating effect of the compressor 31 in a low temperature environment and also utilize the heat of the exhaust air. Different working modes are used for different fresh air temperatures to ensure that fresh air is continuously input into the tunnel 6, and the fresh air will not cause ice inside the tunnel 6. Both working modes recycle the heat of the exhaust air, thereby improving resource utilization and reducing heat waste and resource consumption.

[0030] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A mine air heating heat recovery system, characterized in that: include: A fresh air heating assembly comprises an air inlet, a first liquid coil and a first fan, wherein the first liquid coil is located between the air inlet and the first fan, an output end of the first fan is used to communicate with an entrance of the lane, and the air inlet is provided with a first temperature sensor connected to a controller; The exhaust air heat recovery component comprises an air receiving port, a second liquid coil and a second fan, wherein the air receiving port is used to communicate with the outlet of the laneway, the second liquid coil is located between the air receiving port and the second fan, the first liquid coil is provided with a second temperature sensor connected to the controller, a first flow channel and a second flow channel are connected between the first liquid coil and the second liquid coil, the first flow channel is provided with a first three-way valve, and the second flow channel is provided with a second three-way valve and a driving pump; A deep heat recovery component is connected between the first three-way valve and the second three-way valve.

2. The heat recovery system for tunnel air heating according to claim 1 is characterized in that: The deep heat recovery component includes a heat exchanger connected between the first three-way valve and the second three-way valve.

3. The heat recovery system for heating shaft air according to claim 2 is characterized in that: The deep heat recovery component also includes a compressor, a gas-liquid separator and an evaporator. The compressor is connected to the heat exchanger and the gas-liquid separator, the gas-liquid separator is connected to the evaporator, and the evaporator is connected to the heat exchanger.

4. The mine air heating heat recovery system according to claim 3 is characterized in that: A throttling element is connected between the evaporator and the heat exchanger.

5. The heat recovery system for heating shaft air according to claim 3 is characterized in that: Fins are provided on surfaces of the first liquid coil, the second liquid coil and the evaporator.

6. The mine air heating heat recovery system according to claim 2 is characterized in that: The heat exchanger is provided with a third temperature sensor connected to the controller.

7. The mine air heating heat recovery system according to claim 1 is characterized in that: The deep heat recovery component is located between the second liquid coil and the second fan.

8. The mine air heating heat recovery system according to claim 1 is characterized in that: A pressure stabilizing tank is provided between the second three-way valve and the second liquid coil.

9. The mine air heating heat recovery system according to claim 1 is characterized in that: A first filter is provided between the first liquid coil and the air inlet, and the first filter is connected to a first sand discharge pipe.

10. The mine air heating heat recovery system according to claim 1, characterized in that: A second filter is provided between the second liquid coil and the air receiving port, and the second filter is connected to a second sand discharge pipe.

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