Downhole air selection system

Abstract

The application provides an underground winnowing system, comprising a winnowing machine, a blower, an air inlet pipeline and an air suction pipeline, the winnowing machine is arranged in a roadway, the blower is arranged on the ground, two ends of the air inlet pipeline are connected with an air inlet of the winnowing machine and an air outlet of the blower respectively, and two ends of the air suction pipeline are connected with an air outlet of the winnowing machine and an air inlet of the blower respectively. The application can sort the collected raw coal in the roadway, only the sorted clean coal is transported to the ground, and the gangue and impurities are placed in the roadway, which is beneficial to reduce the transportation volume and save the cost. The winnowing machine in the roadway forms a circulation loop with the blower arranged on the ground through the air inlet pipeline and the air suction pipeline, so that the problem of airflow disorder caused by the winnowing machine in the underground use process can be solved. The sorting process does not discharge dust into the roadway, and the risk of explosion in the roadway is reduced. The application only arranges the winnowing machine in the roadway, and the occupied space is small.

Description

Technical Field

[0001] This application relates to wind-powered coal preparation technology, and more particularly to an underground wind separation system. Background Technology

[0002] Pneumatic coal preparation technology is a technique that uses airflow to separate raw coal. Its basic principle is that the raw coal is gravity-fed in the airflow, and the airflow separates clean coal of different densities from impurities such as gangue. Pneumatic coal preparation technology has advantages such as high separation efficiency, simple equipment, convenient maintenance, water saving, and low cost, making it the preferred solution for raw coal separation in water-scarce areas.

[0003] In related technical solutions, wind-powered coal preparation systems are generally set up on the ground. During the sorting process, the collected raw coal needs to be transported to the ground before it can be sent into the wind-powered coal preparation system for sorting operations. This results in a large transportation volume and high costs. Utility Model Content

[0004] To overcome the aforementioned deficiencies of related technologies, the purpose of this application is to provide an underground air separation system. This system can separate raw coal within the mine roadway, requiring only the transport of the separated clean coal to the surface, thus reducing transportation volume and saving costs. Furthermore, it occupies less space within the roadway, and the separation process will not cause underground airflow turbulence or roadway explosions, resulting in better safety.

[0005] This application provides a downhole air separation system, comprising:

[0006] An air separator, the air separator being installed in a roadway;

[0007] Blower, the blower being installed on the ground;

[0008] An air inlet duct, the two ends of which are respectively connected to the air inlet of the air separator and the air outlet of the blower;

[0009] The suction duct is connected at both ends to the air outlet of the air separator and the air inlet of the blower, respectively.

[0010] In one possible implementation, a cyclone dust collector is also included, which is to be installed on the ground and located on the suction duct between the air separator and the blower.

[0011] In one possible implementation, a plurality of the cyclone dust collectors are provided on the ground, and the plurality of the cyclone dust collectors are connected in parallel on the suction duct.

[0012] In one possible implementation, it also includes an exhaust fan and an exhaust duct, wherein the exhaust fan is connected to the suction duct through the exhaust duct, and the exhaust fan is used to extract a portion of the gas in the suction duct.

[0013] In one possible implementation, a dust collector is also included, which is disposed on the exhaust duct.

[0014] In one possible implementation, the dust collector includes a cartridge dust collector, a bag dust collector, or a wet scrubber.

[0015] In one possible implementation, the tunnel and the ground are connected by at least one vertical shaft, and both the air intake pipe and the air intake pipe are located in the vertical shaft.

[0016] In one possible implementation, the air intake duct and the air intake duct are located within the same vertical shaft.

[0017] In one possible implementation, the air intake duct and the air intake duct are respectively located in different vertical shafts.

[0018] In one possible implementation, the cross-sectional area of ​​the air separator is smaller than the cross-sectional area of ​​the roadway.

[0019] This application provides an underground air separation system, including an air separator, a blower, an air inlet duct, and an air suction duct. The air separator is installed inside the roadway; the blower is installed on the surface; the two ends of the air inlet duct are connected to the air inlet of the air separator and the air outlet of the blower, respectively; the two ends of the air suction duct are connected to the air outlet of the air separator and the air inlet of the blower, respectively. By installing the air separator inside the roadway, this application allows for the separation of collected raw coal within the roadway, transporting only the separated clean coal to the surface while leaving impurities such as gangue in the roadway, thus reducing transportation volume and saving costs. The air separator inside the roadway forms a circulation loop with the blower on the surface through the air inlet and suction ducts, thereby solving the problem of turbulent airflow caused by the air separator during underground operation. The separation process does not release dust into the roadway, reducing the risk of explosions within the roadway. This application, by installing only the air separator inside the roadway, occupies less space, allowing the roadway space to meet the usage requirements. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A simplified structural diagram of a downhole air separation system provided in an embodiment of this application.

[0022] Figure label:

[0023] 10-lane;

[0024] 20 - Ground;

[0025] 30 - Vertical Shaft;

[0026] 100-Air classifier;

[0027] 200- Blower;

[0028] 300 - Air inlet duct;

[0029] 400 - Suction duct;

[0030] 500-Cyclone Dust Collector;

[0031] 600-Exhaust fan;

[0032] 700 - Exhaust duct;

[0033] 800-Dust Collector. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0035] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] In related technologies, pneumatic coal preparation systems are typically installed above ground. The collected raw coal must first be transported to the surface before being fed into the pneumatic coal preparation system for sorting, resulting in large transportation volumes and high costs. If such systems were placed inside roadways, two problems arise: firstly, the air separators require high air volume and velocity, which is often insufficient with just the ventilation ducts connecting the roadways, leading to excessive gas consumption and turbulent airflow underground. Secondly, the sorting process continuously generates dust; if this dust is directly discharged into the roadways, the dust concentration will gradually increase, potentially posing a dust explosion risk. Furthermore, the overall size of the pneumatic coal preparation system is large, and existing roadways cannot adequately accommodate its space requirements.

[0037] In view of this, the embodiments of this application aim to provide an underground air separation system. By installing an air separator inside the roadway, the collected raw coal can be separated within the roadway, with only the separated clean coal transported to the surface, while impurities such as gangue are placed in the roadway. This helps reduce transportation volume and save costs. The air separator in the roadway forms a circulation loop with the blower installed on the surface through air inlet and exhaust pipes, thereby solving the problem of airflow turbulence caused by the air separator during underground use. The separation process does not emit dust into the roadway, which helps reduce the risk of explosion within the roadway. This application only installs the air separator inside the roadway, occupying less space, allowing the roadway space to meet the usage space requirements.

[0038] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can gain a more detailed understanding of the contents of this application.

[0039] Please refer to Figure 1 This embodiment provides a downhole air separation system, including:

[0040] Air classifier 100 is installed in roadway 10. Exemplarily, air classifier 100 can be an existing air classifier, such as TGS cascade dry separator, compound fine coal dry separator, air jigging, fluidized bed separator, etc., so as to facilitate the installation of air classifier 100 in roadway 10.

[0041] Blower 200 is provided for installation on the ground 20. Exemplarily, the power of blower 200 can be set as needed. For example, a power-adjustable blower can be selected for blower 200 to adjust the airflow to meet different usage requirements.

[0042] An air inlet duct 300 is provided, with its two ends connected to the air inlet of the air separator 100 and the air outlet of the blower 200, respectively. For example, the two ends of the air inlet duct 300 can be connected to the air inlet of the air separator 100 and the air outlet of the blower 200 via flanges or similar devices.

[0043] The suction duct 400 has its two ends connected to the air outlet of the air separator 100 and the air inlet of the blower 200, respectively. For example, the two ends of the suction duct 400 can be connected to the air inlet of the air separator 100 and the air outlet of the blower 200 through flanges or other devices.

[0044] This embodiment allows for the separation of collected raw coal within the roadway 10 by installing the air separator 100 inside the roadway 10. Only the separated clean coal is transported to the surface, while impurities such as gangue are placed in the roadway 10, which helps reduce transportation volume and save costs. The air separator 100 inside the roadway 10 forms a circulation loop with the blower 200 installed on the ground 20 through the air inlet pipe 300 and the air suction pipe 400, thereby solving the problem of airflow turbulence caused by the air separator 100 during underground use. The separation process does not emit dust into the roadway 10, which helps reduce the risk of explosion within the roadway 10. This embodiment only installs the air separator 100 inside the roadway 10, occupying a small space, allowing the roadway space to meet the usage space requirements.

[0045] Please continue to refer to Figure 1 The underground air separation system in this embodiment also includes a cyclone dust collector 500, which is installed on the ground 20 and located on the suction duct 400 between the air separator 100 and the blower 200. That is, the gas discharged from the air separator 100 must first pass through the cyclone dust collector 500 before entering the blower 200. The cyclone dust collector 500 can remove some of the dust inside the suction duct 400, thereby reducing the risk of explosion and helping to prevent the blower 200 from becoming clogged, thus extending the service life of the blower 200.

[0046] Optionally, multiple cyclone dust collectors 500 can be installed on the ground 20, and the multiple cyclone dust collectors 500 are arranged in parallel on the suction duct 400. Exemplarily, the multiple cyclone dust collectors 500 can be of the same power or different power. The multiple cyclone dust collectors 500 can operate simultaneously, or some of the cyclone dust collectors 500 can be selectively operated. By setting up multiple cyclone dust collectors 500, the dust removal efficiency can be further improved.

[0047] Please continue to refer to Figure 1 The downhole air separation system in this embodiment also includes an induced draft fan 600 and an induced draft duct 700. The induced draft fan 600 is connected to the suction duct 400 through the induced draft duct 700. The induced draft fan 600 is used to extract part of the gas in the suction duct 400, thereby keeping the inside of the suction duct 400 under negative pressure to prevent dust from overflowing. The induced draft fan 600 can be connected to the outside air.

[0048] Furthermore, the underground air separation system of this embodiment also includes a dust collector 800, which is installed on the induced draft duct 700. By installing the dust collector 800, dust in the induced draft duct 700 can be further removed, preventing dust from entering the induced draft fan 600 or being discharged into the outside air, which helps to extend the service life of the induced draft fan 600 and avoid air pollution.

[0049] Optionally, the dust collector 800 in this embodiment includes a cartridge dust collector, a bag filter dust collector, or a wet scrubber. A suitable type of dust collector can be selected based on needs to meet different scenario requirements.

[0050] Please continue to refer to Figure 1 In this embodiment, the tunnel 10 and the ground 20 are connected by at least one shaft 30, and the air intake pipe 300 and the air suction pipe 400 are both installed in the shaft 30.

[0051] Alternatively, the air inlet duct 300 and the air exhaust duct 400 can be installed in the same shaft 30, thereby saving space and reducing construction difficulty and cost.

[0052] Alternatively, the air intake duct 300 and the air intake duct 400 can be installed in different vertical shafts 30 to avoid interference between them and improve air intake and air intake efficiency.

[0053] In this embodiment, the cross-sectional area of ​​the air classifier 100 is smaller than that of the tunnel 10, so that the air classifier 100 can be directly placed into the tunnel 10 without expanding the tunnel 10, thereby reducing construction difficulty and cost.

[0054] The underground air separation system provided in this embodiment separates the air separation equipment (i.e., air separator 100) from the air supply equipment (i.e. blower 200), which are respectively installed in the underground roadway and on the surface above ground. This satisfies both the underground explosion-proof requirements and the air force requirements for separation, enabling underground air separation to be implemented.

[0055] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] It should be noted that in the description of this application, the terms "first" and "second" are used only for convenience in describing different components and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.

[0058] The embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0059] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A downhole air separation system, characterized in that, include: An air separator, the air separator being installed in a roadway; Blower, the blower being installed on the ground; An air inlet duct, the two ends of which are respectively connected to the air inlet of the air separator and the air outlet of the blower; The suction duct is connected at both ends to the air outlet of the air separator and the air inlet of the blower, respectively.

2. The downhole air separation system according to claim 1, characterized in that, It also includes a cyclone dust collector, which is installed on the ground and located on the suction duct between the air separator and the blower.

3. The downhole air separation system according to claim 2, characterized in that, Multiple cyclone dust collectors are provided on the ground, and the multiple cyclone dust collectors are connected in parallel on the suction duct.

4. The downhole air separation system according to claim 1, characterized in that, It also includes an exhaust fan and an exhaust duct, wherein the exhaust fan is connected to the suction duct through the exhaust duct, and the exhaust fan is used to extract part of the gas in the suction duct.

5. The downhole air separation system according to claim 4, characterized in that, It also includes a dust collector, which is installed on the exhaust duct.

6. The downhole air separation system according to claim 5, characterized in that, The dust collector includes a cartridge dust collector, a bag dust collector, or a wet dust collector.

7. The downhole air separation system according to claim 1, characterized in that, The tunnel and the ground are connected by at least one vertical shaft, and both the air intake pipe and the air suction pipe are installed in the vertical shaft.

8. The downhole air separation system according to claim 7, characterized in that, The air intake pipe and the air intake pipe are located in the same vertical shaft.

9. The downhole air separation system according to claim 7, characterized in that, The air intake pipe and the air intake pipe are respectively installed in different vertical shafts.

10. The downhole air separation system according to claim 1, characterized in that, The cross-sectional area of ​​the air separator is smaller than the cross-sectional area of ​​the roadway.

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