A heat hazard exhaust and flue gas emission system for underground spaces

Abstract

This invention discloses an underground space heat hazard exhaust and flue gas emission system and method. The emission system includes: a main exhaust unit, a flue gas treatment unit, an underground tunnel structure forming a working platform surface in the underground space and connecting the main exhaust unit and the flue gas treatment unit through an airflow path, a general control unit providing remote active communication to the main exhaust unit and the flue gas treatment unit and monitoring and analyzing the underground tunnel structure, and a waste heat energy extraction unit that receives heat energy obtained from the main exhaust unit. The emission system also includes an electrically triggered subcooling accumulator buried in the underground space for passive temperature control and coupled with the main exhaust unit. This invention does not occupy surface space, has low engineering costs, utilizes the coupling effect of traditional heat exchange and phase change heat storage, has high waste heat utilization efficiency, and fast heat exchange speed. The flue gas heat energy is collected on the electrically triggered subcooling accumulator through the phase change heat storage material baffle, and the heat energy is utilized again efficiently, resulting in high flue gas emission efficiency.

Description

Technical Field

[0001] This invention relates to a heat exhaust and flue gas emission system, and more particularly to a heat hazard exhaust and flue gas emission system for underground spaces. Background Technology

[0002] As the depth of mineral resource extraction increases, the problem of high-temperature heat hazards in underground spaces, especially mines, is becoming increasingly prominent. With the increase in mining depth, the temperature of the original rock rises, and factors such as heat release from roadway rocks, mineral oxidation, heat generation from mechanical equipment, airflow self-compression, and groundwater release exotherm make the problem of high-temperature heat hazards in mines, especially deep mines, increasingly prominent. The high-temperature and high-humidity working environment seriously threatens the safe production of mines and the life and health of workers.

[0003] The selection of methods for heat venting and flue gas emission in underground spaces has become an urgent problem to be solved in the management of heat hazards in underground spaces. In addition, existing methods for heat venting and flue gas emission in underground spaces usually require the construction of related emission facilities on the surface, which occupies a large amount of surface space and has high engineering costs. Moreover, the waste heat utilization during heat venting is carried out by steam exchange, which has low heat exchange efficiency. The particulate settling and cooling of flue gas is also carried out by water showering, which is inefficient and requires the construction of separate shower chambers, making the construction project complicated. Summary of the Invention

[0004] To address the shortcomings of the aforementioned technologies, this invention provides an underground space heat hazard exhaust and flue gas emission system.

[0005] A thermal hazard exhaust and flue gas emission system for underground spaces, the emission system comprising:

[0006] The exhaust gas main unit is in direct contact with the high-temperature flue gas that causes heat damage, and is subjected to cooling, heat energy conversion, and emission treatment.

[0007] A flue gas treatment unit is interspersed within the process of treating high-temperature flue gas that causes heat damage in the main exhaust unit.

[0008] An underground tunnel structure that forms a working platform surface in the underground space and connects the main temperature exhaust unit and the flue gas treatment unit through air flow paths;

[0009] The main control unit provides remote active communication to the main temperature exhaust unit and flue gas treatment unit and monitors and analyzes the underground tunnel structure;

[0010] Waste heat energy extraction unit that receives heat energy obtained from the main exhaust unit;

[0011] The emission system also includes an electrically triggered subcooled heat storage device that is buried underground and passively controlled, and coupled with the main emission unit.

[0012] Furthermore, the underground tunnel structure includes a surrounding rock layer formed after the underground space is excavated, and an air insulation layer that conforms to the spatial shape of the surrounding rock layer and does not contact it is configured near the wall of the surrounding rock layer.

[0013] The space between the surrounding rock layer and the air insulation layer is a high-temperature flue gas chamber filled with high-temperature flue gas;

[0014] The inner wall of the air insulation layer is also equipped with a primary lining that supports the spatial structure, and a heat exchange pipe for heat conduction is also closely attached between the air insulation layer and the primary lining.

[0015] Furthermore, the cold pipe section of the heat exchange piping is formed in a manner that maintains a temperature lower than the conduction temperature at the air insulation layer.

[0016] Furthermore, the flue gas treatment unit includes a flue gas particulate filter configured in the high-temperature flue gas chamber, which is directed to the first contact position to treat the high-temperature flue gas. The high-temperature flue gas treated by the flue gas particulate filter flows in the duct and contacts the phase change heat storage material baffle plate installed in the duct to provide heat energy to the phase change heat storage material baffle plate.

[0017] The flue gas particulate filter is formed by intercepting solid particles larger than a preset size in the direction of high-temperature flue gas flow;

[0018] The phase change heat storage material baffle is formed by multiple spaced and meandering baffles in the air duct to form a serpentine channel. The phase change heat storage material baffle is then subjected to multiple collisions with the high-temperature flue gas to absorb the heat energy of the high-temperature flue gas. Thus, the heat energy of the high-temperature flue gas passing through the phase change heat storage material baffle is reduced.

[0019] Furthermore, the exhaust unit also includes a fresh air device, which is formed by combining the high-temperature flue gas passing through the phase change heat storage material baffle and providing it with kinetic energy. At the rear end of the fresh air device, there is also an underground heat and humidity control component that regulates the flue gas passing through the fresh air device.

[0020] Furthermore, the waste heat energy extraction unit has two flow paths: underground heat energy circulation and air circulation;

[0021] The underground thermal energy circulation path includes working fluid circulation pipes that conduct energy with the underground heat and humidity control system. The working fluid circulation pipes are implemented in a double-pipe unidirectional conduction manner to form a circulation.

[0022] The first half of the cycle is implemented by supplying heat energy to the energy harvesting and storage module through the working fluid circulation pipeline from the underground heat and humidity control component. The second half of the cycle is implemented by the energy harvesting and storage module selectively supplying heat energy back to the underground heat and humidity control component or supplying heat energy to the heat conduction generator through the working fluid circulation pipeline.

[0023] The airflow path includes an airflow path with two openings that connect to the ground surface to obtain air. The airflow path gradually descends into the underground space, and the lowest point of the path is a chamber containing a heat conduction generator. The heat conduction generator converts heat energy into electrical energy to power surface facilities.

[0024] Furthermore, the main control unit includes a calculation and analysis module, a roadway surrounding rock monitoring module, a phase change thermal storage data control console, and a heat exchange control module, and each of them is connected to each other via a data acquisition line.

[0025] Furthermore, the calculation and analysis module establishes a communication connection with the phase change thermal storage data control console via a data acquisition line. The calculation and analysis module also establishes a communication connection with the heat exchange control module and the roadway surrounding rock monitoring module via the data acquisition line. The heat exchange control module and the roadway surrounding rock monitoring module also have a separate communication connection via a data acquisition line.

[0026] Furthermore, the roadway surrounding rock monitoring module acquires the temperature and airflow information of the high-temperature flue gas in the high-temperature flue gas chamber by remotely communicating with temperature sensors and airflow sensors configured on the surrounding rock layer wall.

[0027] The phase change thermal storage data control console implements data transmission and real-time monitoring with the electrically triggered subcooled thermal accumulator via 5G communication.

[0028] The heat exchange control module implements real-time monitoring of heat exchange by monitoring dual-path feedback information from the underground humid heat regulation component and the energy harvesting and storage module.

[0029] This invention discloses an underground space heat hazard exhaust and flue gas emission system. This system does not require the construction of supporting surface buildings, does not occupy surface space, and has low engineering costs. Furthermore, this system utilizes the coupling effect of traditional heat exchange and phase change heat storage to utilize waste heat during the heat hazard exhaust process, resulting in high utilization efficiency and fast heat exchange speed. The waste heat can also be converted into electrical energy through a heat conduction generator. The flue gas emission is filtered through a flue gas particulate filter, and then the heat energy of the flue gas is cleverly collected by the phase change heat storage material baffle plate onto an electrically triggered subcooled heat storage device for efficient utilization of heat energy again. Finally, a fresh air device is used to quickly exhaust the flue gas, resulting in high flue gas exhaust efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the exhaust temperature main unit and flue gas treatment unit of the present invention.

[0031] Figure 2 This is a schematic diagram of the underground tunnel structure of the present invention.

[0032] Figure 3 This is a schematic diagram of the overall control unit of the present invention.

[0033] Figure 4 This is a schematic diagram of the waste heat energy extraction unit of the present invention.

[0034] Figure 5 This is a performance curve diagram of the electrically triggered subcooled heat accumulator of the present invention.

[0035] In the picture:

[0036] 1. Main exhaust unit; 11. Underground heat and humidity control components; 12. Phase change heat storage material baffle; 13. High-temperature flue gas chamber; 14. Fresh air system;

[0037] 2. Flue gas treatment unit; 21. Flue gas particulate filter; 22. Air duct;

[0038] 3. Underground tunnel structure; 31. Surrounding rock layer; 32. Air insulation layer; 33. Initial lining; 34. Heat exchange pipe layout; 35. Heat circulation pipe; 36. Cold circulation pipe;

[0039] 4. Main control unit; 41. Calculation and analysis module; 42. Roadway surrounding rock monitoring module; 43. Phase change thermal storage data control console; 44. Heat exchange control module; 45. Data acquisition line;

[0040] 5. Electrically triggered subcooling accumulator;

[0041] 6. Waste heat energy extraction unit; 61. Energy collection and storage module; 62. Heat conduction generator; 63. Airflow path; 64. Working fluid circulation pipeline. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0043] This embodiment relates to an underground space heat hazard exhaust and flue gas emission system, which includes both an underground space heat hazard exhaust and flue gas emission system and a method for the underground space heat hazard exhaust and flue gas emission system.

[0044] refer to Figure 1-4 As shown, the underground space heat hazard exhaust and flue gas emission system includes:

[0045] The system includes a main exhaust unit 1 that directly contacts and cools, converts heat energy, and treats the high-temperature flue gas that causes heat damage; a flue gas treatment unit 2 that treats the flue gas during the process of the main exhaust unit 1 treating the high-temperature flue gas that causes heat damage; an underground tunnel structure 3 that forms a working platform in the underground space and connects the main exhaust unit 1 and the flue gas treatment unit 2 through an airflow path; a general control unit 4 that provides remote active communication to the main exhaust unit 1 and the flue gas treatment unit 2 and monitors and analyzes the underground tunnel structure 3; a waste heat energy extraction unit 6 that receives the heat energy obtained from the main exhaust unit 1; and an electrically triggered subcooling accumulator 5 that is buried in the underground space for passive temperature control and coupled with the main exhaust unit 1.

[0046] In this embodiment, as Figure 2 As shown, the underground tunnel structure 3 includes a surrounding rock layer 31 formed after underground space excavation. An air insulation layer 32, conforming to the spatial shape of the surrounding rock layer 31 but not in contact with it, is disposed near the wall of the surrounding rock layer 31. It should be noted that the thermal conductivity of the surrounding rock layer 31 is preferably greater than 3.18 W / (m·K), and the thermal conductivity of the air insulation layer 32 is preferably 0.56 W / m·℃. ;

[0047] The space between the surrounding rock layer 31 and the air insulation layer 32 is a high-temperature flue gas chamber 13 filled with high-temperature flue gas. The inner wall of the air insulation layer 32 is also equipped with a primary lining 33 that supports the spatial structure. A heat exchange pipe 34 for heat conduction is also closely attached between the air insulation layer 32 and the primary lining 33. The heat exchange pipe 34 is connected to the hot circulation pipe 35 and the cold circulation pipe 36 respectively. Moreover, a heat exchange pipe 34 is also laid in the inner layer of the primary lining 33. In this way, the heat exchange parts are fully covered, which is conducive to improving the heat exchange efficiency at the source.

[0048] Preferably, the cold pipe portion of the heat exchange pipe 34 is formed in such a way that its temperature is always lower than the conduction temperature at the air insulation layer 32. In this way, by utilizing the law of conservation of energy, it is ensured that the heat on the air insulation layer 32 and the initial lining 33 can always be conducted to the heat exchange pipe 34.

[0049] In this embodiment, the flue gas treatment unit 2 includes a flue gas particulate filter 21 disposed in the high-temperature flue gas flow path of the high-temperature flue gas chamber 13 to the first contact position for treating the high-temperature flue gas, such as Figure 1 As shown, the high-temperature flue gas, after being treated by the flue gas particulate filter 21, flows in the duct 22 and comes into contact with the phase change heat storage material baffle 12 installed in the duct 22 to provide heat energy to the phase change heat storage material baffle 12.

[0050] Preferably, the flue gas particulate filter 21 is formed in a way that intercepts solid particles larger than a preset size in the direction of high-temperature flue gas flow. In other words, the flue gas particulate filter 21 can filter out particulate matter in high-temperature flue gas and prevent large particles of high-temperature flue gas from depositing in the air duct 22 and affecting ventilation efficiency.

[0051] Preferably, the phase change heat storage material baffle 12 is formed by multiple spaced and meandering channels within the air duct 22 to form a serpentine channel. This allows the phase change heat storage material baffle 12 to repeatedly collide with the high-temperature flue gas to absorb its heat energy. Consequently, the heat energy of the high-temperature flue gas passing through the phase change heat storage material baffle 12 is reduced. It should be noted that the phase change heat storage material baffle 12 is connected to the electrically triggered subcooling accumulator 5. The electrically triggered subcooling accumulator 5 is essentially a heat collection device, and as a passive temperature control device, it forms an independent heat collection and utilization branch. Furthermore, the preferred performance curve of the electrically triggered subcooling accumulator 5 is as follows: Figure 5 As shown.

[0052] like Figure 1 As shown, the exhaust unit 1 also includes a fresh air device 14. The fresh air device 14 is formed by combining the high-temperature flue gas passing through the phase change heat storage material baffle 12 and providing it with kinetic energy. The downstream of the fresh air device 14 also has an underground heat regulation component 11 for regulating the flue gas passing through the fresh air device 14. Thus, another branch of high-temperature flue gas heat exchange and emission is formed at the underground heat regulation component 11. On this basis, a highly efficient high-temperature flue gas heat exchange with the mutual coupling of heat exchange and phase change heat storage is formed, doubling the heat exchange efficiency and improving the utilization of thermal energy.

[0053] Again Figure 1 As shown, through the efficient combination of the exhaust temperature main unit 1 and the flue gas treatment unit 2, the high-temperature flue gas emission path is short, and the fresh air device 14 can provide new emission kinetic energy for the cooled flue gas in the latter part of the high-temperature flue gas emission path, thereby improving the emission efficiency of the flue gas.

[0054] In this embodiment, as Figure 4 As shown, the waste heat energy extraction unit 6 has two flow paths: underground heat energy circulation and air circulation.

[0055] The underground thermal energy flow path includes a working fluid flow pipe 64 that conducts energy with the underground heat and humidity control component 11. The working fluid flow pipe 64 forms a circulation in a dual-pipe unidirectional conduction manner. The first half of the circulation is formed by the underground heat and humidity control component 11 supplying thermal energy to the energy harvesting and storage module 61 through the working fluid flow pipe 64. The second half of the circulation is formed by the energy harvesting and storage module 61 selectively supplying thermal energy back to the underground heat and humidity control component 11 or to the heat conduction generator 62 through the working fluid flow pipe 64.

[0056] It should be noted that the energy harvesting and storage module 61 is essentially the total heat collection device of the heat exchange section. When the thermal energy required for the underground humidity and heat control component 11 and its front-end process is insufficient, it can be replenished. When the thermal energy required for the underground humidity and heat control component 11 and its front-end process is sufficient, the energy harvesting and storage module 61 supplies thermal energy to the heat conduction generator 62 through the working fluid flow pipe 64.

[0057] The airflow path includes an airflow path 63 with two openings that connect to the ground surface to obtain air. The airflow path 63 gradually descends into the underground space, and the lowest point of its descent is a chamber where a heat conduction generator 62 is placed. The heat conduction generator 62 converts the heat energy obtained from the energy harvesting and storage module 61 into electrical energy to power the surface facilities.

[0058] In this embodiment, as Figure 3 As shown, the main control unit 4 includes a calculation and analysis module 41, a roadway surrounding rock monitoring module 42, a phase change heat storage data control console 43, and a heat exchange control module 44, and each of them is connected to each other via a data acquisition line 45.

[0059] Preferably, the calculation and analysis module 41 is connected to the phase change thermal storage data control console 43 via the data acquisition line 45. The calculation and analysis module 41 is also connected to the heat exchange control module 44 and the roadway surrounding rock monitoring module 42 via the data acquisition line 45. The heat exchange control module 44 and the roadway surrounding rock monitoring module 42 are also connected separately via the data acquisition line 45.

[0060] Furthermore, the roadway surrounding rock monitoring module 42 implements remote communication with temperature sensors and airflow sensors configured on the wall of the surrounding rock layer 31 to obtain temperature and airflow information of high-temperature flue gas in the high-temperature flue gas chamber 13;

[0061] The phase change thermal storage data control console 43 implements data transmission and real-time monitoring with the electrically triggered subcooled thermal storage device 5 via 5G communication;

[0062] The heat exchange control module 44 implements real-time monitoring of heat exchange by monitoring dual-path feedback information from the underground humid heat regulation component 11 and the energy harvesting and storage module 61.

[0063] Thus, this invention discloses an underground space heat hazard exhaust and flue gas emission system. This system does not require the construction of supporting surface buildings, does not occupy surface space, and has low engineering costs. Furthermore, this system utilizes the coupling effect of traditional heat exchange and phase change heat storage to utilize waste heat during the heat hazard exhaust process, resulting in high utilization efficiency and fast heat exchange speed. In addition, the waste heat can be converted into electrical energy through a heat conduction generator. The flue gas emission is filtered through a flue gas particulate filter, and then the heat energy of the flue gas is cleverly collected on an electrically triggered subcooled heat storage device through a phase change heat storage material baffle plate for efficient utilization of heat energy again. Finally, a fresh air device is used to quickly exhaust the flue gas, resulting in high flue gas exhaust efficiency.

[0064] The above embodiments are not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention.

Claims

1. 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2. The underground space heat casualty temperature and smoke exhaust system according to claim 1, characterized in that: The cold pipe part of the heat exchange pipe (34) is formed in a way that the temperature is always lower than the conduction temperature at the air insulation layer (32).

3. The underground space heat casualty temperature and smoke exhaust system according to claim 1, characterized in that: The total control unit (4) includes a calculation analysis module (41), a roadway surrounding rock monitoring module (42), a phase change heat storage data console (43), a heat exchange control module (44), and is communicatively connected through a data acquisition line (45).

4. The underground space heat casualty temperature and smoke exhaust system according to claim 3, characterized in that: The calculation analysis module (41) is communicatively connected with the phase change heat storage data console (43) through the data acquisition line (45), and is also communicatively connected with the heat exchange control module (44) and the roadway surrounding rock monitoring module (42) through the data acquisition line (45).

5. The underground space heat casualty temperature and smoke exhaust system according to claim 4, characterized in that: The roadway surrounding rock monitoring module (42) is configured to remotely communicate with the temperature sensor and the wind flow sensor arranged on the wall surface of the surrounding rock layer (31) to obtain the temperature and wind flow information of the high-temperature flue gas in the high-temperature flue gas chamber (13); The phase change heat storage data console (43) is communicatively connected with the electric trigger type supercooling heat accumulator (5) through 5G communication to form data transmission and real-time monitoring; The heat exchange control module (44) is configured to monitor the double-way feedback information from the underground wet heat regulation component (11) and the energy collection and storage module (61) to monitor the heat exchange in real time.

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