Mine ventilation air methane comprehensive utilization system
By designing a comprehensive utilization system for mine exhaustion, the problem of low-concentration mine exhaustion is solved, stable combustion and efficient transportation are achieved, greenhouse gas emissions are reduced, and the system is safe and normal operation is ensured.
Patent Information
- Application Number
- CN202422459271.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-11
AI Technical Summary
In the prior art, mine exhaustion with methane concentrations below 0.75% failed to achieve large-scale utilization, resulting in large-scale methane emissions of greenhouse gases and direct emissions affect the environment.
A comprehensive utilization system for mine exhaust air is designed. The mine exhaust air is mixed with air through a blending device and then sent to the boiler for combustion, including a return air vertical shaft, a boiler, a blending device and a connecting pipeline to ensure stable combustion of exhaust air and improve the delivery efficiency. The system also includes a blower, a sound-silencing equipment and an explosion-proof structure to ensure safety and stability.
It realizes effective utilization of mine exhaust wind, improves combustion stability and energy utilization efficiency, reduces greenhouse gas emissions, and ensures the safety and normal operation of the system.
Smart Images
Figure CN223228404U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of mine ventilation extraction, and in particular to a mine ventilation comprehensive utilization system. Background Art
[0002] The current status of comprehensive utilization technologies of coal mine gas with mature cases is as follows: (1) High-concentration gas with a methane volume fraction of more than 30% is directly used as gas for power generation, boiler gas, etc.; (2) 8-30% extracted gas is directly used for internal combustion engine power generation; (3) 6-9% gas is used for power generation using diesel ignition technology; (4) 3-9% low-concentration coal mine gas is used for safe and stable combustion technology in low-concentration gas direct-fired power plants; (5) 0.4-5% gas is used directly or after mixing and dilution using coal mine exhaust air oxidation heat storage devices.
[0003] In related technologies, mine ventilation air with methane concentrations below 0.75% or even lower has not been widely utilized due to factors such as poor economic efficiency, and direct exhaust is the primary method. However, the methane concentration in the ventilation air discharged from most domestic coal mines is extremely low, below 0.1%, and all mine ventilation air is discharged externally. Furthermore, the ventilation air volume in coal mines is generally high, resulting in large emissions of the greenhouse gas methane. Utility Model Content
[0004] The purpose of the present disclosure is to provide a mine ventilation comprehensive utilization system, which reduces the impact of methane emissions on global greenhouse gas emissions.
[0005] In order to achieve the above-mentioned objectives, the present disclosure provides a mine exhaust air comprehensive utilization system, which includes: a return air shaft for discharging mine exhaust air; a boiler for introducing air for combustion; and a mixing device, which has a first connecting pipe, a second connecting pipe and a third connecting pipe, the first connecting pipe is connected to the return air shaft, the second connecting pipe is connected to the air supply pipe, the third connecting pipe is connected to the boiler, and the third connecting pipe is arranged downstream of the first connecting pipe and the second connecting pipe and the third connecting pipe is connected to the first connecting pipe and the second connecting pipe.
[0006] Optionally, the first connecting pipe is coaxially arranged with the third connecting pipe, the second connecting pipe includes a first branch pipe and a second branch pipe, the extension directions of the first branch pipe and the second branch pipe are arranged perpendicular to the extension direction of the third connecting pipe, and the first branch pipe and the second branch pipe are respectively arranged between the third connecting pipe and the first connecting pipe.
[0007] Optionally, the extension directions of the first connecting tube and the third connecting tube are perpendicular to each other, and the second connecting tube is coaxially arranged with the first connecting tube.
[0008] Optionally, the mine exhaust air comprehensive utilization system further includes a guide pipe, which extends between the first connecting pipe and the third connecting pipe. The guide pipe is used to introduce mine exhaust air and one end of the guide pipe is close to the air inlet of the boiler.
[0009] Optionally, the guide tube includes a first section and a second section connected at an angle, the first section is provided on the first connecting tube, and the second section is provided on the third connecting tube.
[0010] Optionally, the mine exhaust air comprehensive utilization system includes a collecting device, which is arranged at the air outlet of the return air shaft and is used to transport the mine exhaust air to the mixing device through a conveying pipeline.
[0011] Optionally, the mine exhaust air comprehensive utilization system includes an air blower, which is arranged between the first connecting pipe and the collecting device.
[0012] Optionally, the mine ventilation air comprehensive utilization system further includes an explosion-proof structure, and the explosion-proof structure is arranged at the first connecting pipe.
[0013] Optionally, the explosion-proof structure is configured as an emptying device.
[0014] Optionally, the mine exhaust air comprehensive utilization system includes a silencer, and the silencer is arranged at the air inlet of the boiler.
[0015] Through the above technical solution, through the mine exhaust air comprehensive utilization device provided by the present application, when the mine exhaust air is discharged from the return air shaft, the mine exhaust air can enter the mixing device through the first connecting pipe, and the air enters the mixing device through the second connecting pipe. Since the boiler and the mixing device can be connected through the third connecting pipe, the mixing device can fully mix the mine exhaust air and the air and then send them into the boiler through the third connecting pipe for combustion. Therefore, by fully mixing the mine exhaust air and the air and then sending them into the boiler, the stability and combustion efficiency of the mine exhaust air combustion are guaranteed, and the transportation efficiency of the mine exhaust air is improved, saving energy. Through the above structure, the effective utilization of the mine exhaust air is achieved, and the stability of the mine exhaust air combustion is guaranteed, while the energy utilization efficiency is improved and the greenhouse gas emissions are reduced. In addition, in order to directly improve the transportation pipeline on the basis of the air transportation system to transport the mine exhaust air, the existing transportation system is fully utilized, so that when the mine exhaust air system is closed, air can still enter the boiler to avoid affecting the normal combustion of the boiler.
[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 detailed description, 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 Schematic diagram of the structure of a mine ventilation comprehensive utilization system provided according to an embodiment of the present disclosure;
[0019] Figure 2 This is a structural schematic diagram of a mixing device of a mine ventilation comprehensive utilization system provided in accordance with an embodiment of the present disclosure;
[0020] Figure 3 2 is a schematic structural diagram of a mixing device of a mine ventilation air comprehensive utilization system according to a second embodiment of the present disclosure;
[0021] Figure 4 It is a structural schematic diagram of a mixing device of a mine ventilation air comprehensive utilization system provided according to the third embodiment of the present disclosure.
[0022] Description of Reference Numerals
[0023] 1-return air shaft, 2-boiler, 3-mixing device, 31-first connecting pipe, 32-second connecting pipe, 321-first branch pipe, 322-second branch pipe, 33-third connecting pipe, 4-guide pipe, 41-first section, 42-second section, 5-collecting device, 6-blower, 7-silencer. DETAILED DESCRIPTION
[0024] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.
[0025] In this disclosure, unless otherwise indicated, the use of terms such as "first" and "second" is intended to distinguish different components and does not imply order or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings represent the same elements. Those skilled in the art should understand that the above definitions are intended only to explain and illustrate this disclosure and should not be construed as limiting the disclosure.
[0026] According to the specific embodiment of the present disclosure, Figures 1 to 4As shown, a mine exhaust air comprehensive utilization system is provided, which includes: a return air shaft 1 for discharging mine exhaust air; a boiler 2, which is used to introduce air for combustion; and a mixing device 3, which has a first connecting pipe 31, a second connecting pipe 32 and a third connecting pipe 33. The first connecting pipe 31 is connected to the return air shaft 1, the second connecting pipe 32 is connected to the air supply pipe, and the third connecting pipe 33 is connected to the boiler 2. The third connecting pipe 33 is arranged downstream of the first connecting pipe 31 and the second connecting pipe 32, and the third connecting pipe 33 is connected to the first connecting pipe 31 and the second connecting pipe 32.
[0027] Through the above technical solution, through the mine exhaust air comprehensive utilization device provided by this application, when the mine exhaust air is discharged from the return air shaft 1, the mine exhaust air can enter the mixing device 3 through the first connecting pipe 31, and the air enters the mixing device 3 through the second connecting pipe 32. Since the boiler 2 and the mixing device 3 are connected through the third connecting pipe 33, the mixing device 3 can fully mix the mine exhaust air and air and then send them to the boiler 2 through the third connecting pipe 33 for combustion. Therefore, by fully mixing the mine exhaust air and air and then sending them to the boiler 2, the stability and combustion efficiency of the mine exhaust air combustion are guaranteed, and the transportation efficiency of the mine exhaust air is improved, saving energy. Through the above structure, the effective utilization of the mine exhaust air is achieved, the stability of the mine exhaust air combustion is guaranteed, the energy utilization efficiency is improved, and the greenhouse gas emissions are reduced. In addition, the mine exhaust air is transported directly on the basis of the air transportation system by improving the transportation pipeline, which fully utilizes the existing transportation system. When the mine exhaust air system is shut down, air can still enter the boiler 2 to avoid affecting the normal combustion of the boiler 2.
[0028] In the embodiments provided in this disclosure, reference is made to Figure 2 As shown, the first connecting pipe 31 and the third connecting pipe 33 are coaxially arranged. The second connecting pipe 32 includes a first branch pipe 321 and a second branch pipe 322. The first branch pipe 321 and the second branch pipe 322 extend perpendicularly to the direction of extension of the third connecting pipe 33. The first branch pipe 321 and the second branch pipe 322 are respectively arranged between the third connecting pipe 33 and the first connecting pipe 31. In this way, when there is sufficient space for the conveying pipe between the boiler 2 and the mine exhaust air, both the first branch pipe 321 and the second branch pipe 322 can be used to introduce air. Because the first branch pipe 321 and the second branch pipe 322 are respectively arranged between the third connecting pipe 33 and the first connecting pipe 31, the mine exhaust air conveyed through the first connecting pipe 31 can be conveyed into the boiler 2 together under the positive pressure of the conveying air on both sides, allowing the mine exhaust air to enter the boiler 2 and be completely burned, thereby improving the utilization rate of the mine exhaust air.
[0029] In the embodiments provided in this disclosure, reference is made to Figure 3As shown, the first connecting pipe 31 and the third connecting pipe 33 extend perpendicularly to each other, and the second connecting pipe 32 is coaxially arranged with the first connecting pipe 31. Thus, the first connecting pipe 31 and the second connecting pipe 32 are arranged opposite each other, and both can be arranged perpendicularly to the extension direction of the third connecting pipe 33. As a result, the outlets of the first connecting pipe 31 and the second connecting pipe 32 can be directly adjacent to the inlet of the third connecting pipe 33. This allows the mine exhaust air entering the first connecting pipe 31 and the air entering the second connecting pipe 32 to be directly delivered to the third connecting pipe 33, improving the delivery efficiency and adapting to scenarios where the space between the boiler 2 and the return air shaft 1 is limited.
[0030] In the embodiments provided in this disclosure, reference is made to Figure 4 As shown, the mine exhaust air comprehensive utilization system further includes a guide pipe 4 extending between the first connecting pipe 31 and the third connecting pipe 33. The guide pipe 4 is used to introduce mine exhaust air, and one end of the guide pipe 4 is located near the air inlet of the boiler 2. Thus, by placing the guide pipe 4 between the first connecting pipe 31 and the third connecting pipe 33, the mine exhaust air discharged from the return air shaft 1 is directly introduced into the guide pipe 4, so that the guide pipe 4 can directly deliver the mine exhaust air via the third connecting pipe 33 to the boiler 2 for combustion. This fully utilizes the mine exhaust air, allowing the discharged mine exhaust air to enter the boiler 2 for complete combustion, while also improving the efficiency of transporting the mine exhaust air.
[0031] In the embodiments provided in this disclosure, reference is made to Figure 4 As shown, the guide pipe 4 includes a first section 41 and a second section 42 connected at an angle. The first section 41 is provided in the first connecting pipe 31, and the second section 42 is provided in the third connecting pipe 33. In this way, the guide pipe 4 can adapt to the connection position of the first connecting pipe 31 and the third connecting pipe 33, thereby shortening the conveying distance of the mine exhaust air from the first connecting pipe 31 to the third connecting pipe 33 and improving the conveying efficiency of the mine exhaust air.
[0032] In the embodiments provided in this disclosure, reference is made to Figure 1 As shown, the mine exhaust air comprehensive utilization system includes a collection device 5, which is installed at the air outlet of the return air shaft 1 and is used to transport the mine exhaust air to the blending device 3 through a conveying pipeline. The collection device 5 can concentrate methane in the mine exhaust air, increasing the methane concentration, thereby optimizing the flow rate and concentration of the mine exhaust air, ensuring that the mine exhaust air introduced into the boiler 2 can be burned under safe conditions, and improving the combustion efficiency of the mine exhaust air.
[0033] In the embodiments provided in this disclosure, reference is made to Figure 1As shown, the mine exhaust air comprehensive utilization system includes a blower 6, which is arranged between the first connecting pipe 31 and the collecting device 5. Thus, the mine exhaust air is transported by the blower 6, which can increase the airflow pressure of the mine exhaust air, ensuring that the mine exhaust air can be effectively transported into the mixing device 3 through the first connecting pipe 31 and fully mixed with the air, thereby ensuring the stability and efficiency of the combustion of the mixed gas after entering the boiler 2.
[0034] In the embodiments disclosed herein, the mine ventilation air comprehensive utilization system also includes an explosion-proof structure installed at the first connecting pipe 31. Installing the explosion-proof structure at the first connecting pipe 31, which transports mine ventilation air, prevents explosions when methane concentrations reach dangerous levels. Furthermore, in the event of an abnormality, the system can automatically shut off power or take other safety measures to prevent explosions. This improves the reliability of the entire system and ensures stable operation.
[0035] In the embodiments provided herein, the explosion-proof structure is constructed as an exhaust device. This exhaust device can promptly discharge flammable and explosive gases or vapors in abnormal situations, thereby reducing the concentration of combustible gases within the system and minimizing the possibility of explosion. It can also quickly release pressure within the system in emergencies such as explosions, preventing excessive pressure from causing equipment damage or more serious safety accidents. This improves the safety of the entire system and provides a safer working environment for operators.
[0036] In the embodiments provided in this disclosure, reference is made to Figures 2 to 4 As shown, the mine ventilation air comprehensive utilization system includes a silencer 7, which is installed at the air inlet of boiler 2. This silencer 7 reduces noise during combustion and gas flow, minimizing the impact on the surrounding environment and personnel, and improving the operator's working environment. Furthermore, the installation of silencer 7 reduces vibration caused by noise, thereby improving the operating efficiency and stability of boiler 2 and related equipment.
[0037] Below, reference Figure 1 As shown, the present disclosure will combine the above-mentioned specific implementation methods to give a detailed introduction to the specific use process of the mine exhaust air comprehensive utilization system. When the mine exhaust air is discharged from the return air shaft 1, the discharged mine exhaust air is collected by the collecting device 5, and the flow rate and concentration of the mine exhaust air are optimized. The mine exhaust air treated by the collecting device 5 is sent to the mixing device 3 through the first connecting pipe 31 by the blower 6, and air is simultaneously introduced into the mixing device 3, so that the air and the mine exhaust air can be fully mixed in the mixing device 3, and sent to the boiler 2 through the third connecting pipe 33 for full combustion, thereby achieving effective utilization of the mine exhaust air and saving energy.
[0038] 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 of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.
[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0040] In addition, the 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 mine ventilation comprehensive utilization system, characterized in that: The mine ventilation comprehensive utilization system includes: Return air shaft, used to discharge the mine's lack of air; a boiler for introducing air for combustion; and A mixing device, the mixing device having a first connecting pipe, a second connecting pipe and a third connecting pipe, the first connecting pipe being connected to the return air shaft, the second connecting pipe being connected to the air supply pipe, the third connecting pipe being connected to the boiler, the third connecting pipe being arranged downstream of the first connecting pipe and the second connecting pipe and the third connecting pipe being connected to the first connecting pipe and the second connecting pipe.
2. The mine ventilation comprehensive utilization system according to claim 1, characterized in that: The first connecting pipe is coaxially arranged with the third connecting pipe, and the second connecting pipe includes a first branch pipe and a second branch pipe. The extension directions of the first branch pipe and the second branch pipe are arranged perpendicular to the extension direction of the third connecting pipe, and the first branch pipe and the second branch pipe are respectively arranged between the third connecting pipe and the first connecting pipe.
3. The mine ventilation air comprehensive utilization system according to claim 1, characterized in that: The extending directions of the first connecting tube and the third connecting tube are perpendicular to each other, and the second connecting tube is coaxially arranged with the first connecting tube.
4. The mine ventilation air comprehensive utilization system according to claim 3, characterized in that: The mine ventilation air comprehensive utilization system also includes a guide pipe, which extends between the first connecting pipe and the third connecting pipe. The guide pipe is used to introduce mine ventilation air and has one end close to the air inlet of the boiler.
5. The mine ventilation air comprehensive utilization system according to claim 4, characterized in that: The guide tube includes a first section and a second section connected at an angle, the first section is provided on the first connecting tube, and the second section is provided on the third connecting tube.
6. The mine ventilation air comprehensive utilization system according to claim 1, characterized in that: The mine exhaust air comprehensive utilization system includes a collecting device, which is arranged at the air outlet of the return air shaft and is used to transport the mine exhaust air to the mixing device through a conveying pipeline.
7. The mine ventilation air comprehensive utilization system according to claim 6, characterized in that: The mine ventilation air comprehensive utilization system includes an air blower, which is arranged between the first connecting pipe and the collecting device.
8. The mine ventilation air comprehensive utilization system according to claim 1, characterized in that: The mine ventilation comprehensive utilization system further includes an explosion-proof structure, which is arranged at the first connecting pipe.
9. The mine ventilation air comprehensive utilization system according to claim 8, characterized in that: The explosion-proof structure is configured as an emptying device.
10. The mine ventilation air comprehensive utilization system according to claim 1, characterized in that: The mine exhaust air comprehensive utilization system includes a silencer, which is arranged at the air inlet of the boiler.