Coal-based solid waste treatment device and treatment method

Abstract

The present application relates to the technical field of negative carbon filling, and discloses a coal-based solid waste treatment device and treatment method, which comprises a conveying mechanism for transferring coal-based solid waste to a goaf and unloading the coal-based solid waste; a jetting glue spraying mechanism for blowing off and piling up the coal-based solid waste unloaded by the conveying mechanism to form a piling layer and spraying a cementing layer capable of covering the piling layer on the piling layer; and a gas extraction and inflation mechanism for extracting air in the piling layer and inflating carbon dioxide into the piling layer. The present application can realize the effects of treating bulk coal-based solid waste, controlling surface subsidence and rock stratum movement, achieving carbon sequestration, expanding the carbon dioxide treatment approach, and helping to achieve the "double carbon" goal.

Description

Technical Field

[0001] This invention relates to the field of negative carbon filling technology, and in particular to a coal-based solid waste treatment device and treatment method. Background Technology

[0002] Coal-based solid waste refers to solid waste generated during coal mining and utilization, mainly including coal gangue, fly ash, and tailings.

[0003] To reduce the environmental impact of mining activities, solid backfilling mining has become an important method in coal mining. Under the "dual carbon" goal, various concepts and technologies for low-carbon, zero-carbon, and even negative carbon have been proposed. However, currently, carbon sequestration is mainly carried out in post-mining oil and gas fields with good geological caprock. The application of this technology in coal mines is still in the exploratory stage. Therefore, there is an urgent need for a coal-based solid waste treatment device and treatment method. Summary of the Invention

[0004] The purpose of this invention is to provide a coal-based solid waste treatment device and method, which aims to solve or improve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a coal-based solid waste treatment device, comprising:

[0006] The conveying mechanism is used to transfer coal-based solid waste to the goaf and unload the coal-based solid waste;

[0007] A jet spraying adhesive mechanism is used to blow down and accumulate coal-based solid waste unloaded by the conveying mechanism to form a pile layer, and to spray an adhesive layer that can cover the pile layer onto the pile layer.

[0008] An air extraction and inflation mechanism is used to extract air from the stacked layer and to fill the stacked layer with carbon dioxide.

[0009] Optionally, the jet adhesive spraying mechanism includes:

[0010] Air compressor;

[0011] The nozzle is connected to the output end of the air compressor;

[0012] The feed valve is connected to the nozzle.

[0013] Optionally, the jet adhesive spraying mechanism further includes:

[0014] Lifting device;

[0015] A swing device is connected to the output end of the lifting device, and the swing device is connected to the nozzle.

[0016] Optionally, the air extraction and inflation mechanism includes:

[0017] air pump;

[0018] An air extraction pipe is connected to the air pump;

[0019] The first pressure gauge is installed on the extraction pipe.

[0020] Optionally, the air extraction and inflation mechanism further includes:

[0021] Carbon dioxide cylinder, equipped with an inlet valve;

[0022] An inflation tube is connected to the carbon dioxide cylinder, and an outlet valve is provided on the inflation tube;

[0023] A second pressure gauge is installed on the carbon dioxide cylinder;

[0024] The third pressure gauge is installed on the inflation tube.

[0025] Optionally, it also includes a acquiring device for acquiring the thickness values ​​of the deposited layer and the adhesive layer.

[0026] Optionally, the conveying mechanism is a perforated bottom-discharge scraper conveyor.

[0027] The present invention also provides a method for treating coal-based solid waste, comprising the following steps:

[0028] The conveying mechanism is used to transfer coal-based solid waste to the goaf and unload it.

[0029] The coal-based solid waste unloaded by the conveying mechanism is blown down and piled up by the jet spraying and adhesive spraying mechanism to form the pile layer, and an adhesive layer that can cover the pile layer is sprayed on the pile layer;

[0030] The air is extracted from the stacked layer by the air extraction and inflation mechanism, and carbon dioxide is injected into the stacked layer.

[0031] Optionally, after spraying a bonding layer onto the deposited layer that can cover the deposited layer, the method further includes:

[0032] The next layer of the deposit is blown off and deposited onto the cementing layer on the previous layer of the deposit.

[0033] Optionally, when filling the stacked layer with carbon dioxide, the method further includes:

[0034] When air is extracted from the stacked layer, carbon dioxide is introduced into the previous stacked layer.

[0035] This invention discloses the following technical effects: By using an air jet spraying mechanism to process coal-based solid waste transported by a conveying mechanism, a stockpile layer and a cemented layer are formed, which can be stacked in multiple layers to form an intermittent carbon storage chamber. By using an air extraction and inflation mechanism to extract air from the stockpile layer and inject carbon dioxide, it is possible to treat large quantities of coal-based solid waste, control surface subsidence and rock strata movement, achieve carbon sequestration, expand carbon dioxide treatment pathways, and help achieve the "dual carbon" goal. Attached Figure Description

[0036] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0037] Figure 1 This is a schematic diagram of the processing apparatus for forming the deposited layer according to the present invention;

[0038] Figure 2 This is a schematic diagram of the processing apparatus for forming the adhesive layer according to the present invention;

[0039] Figure 3 This is a schematic diagram of the processing device for extracting air from and filling carbon dioxide into the stacked layer according to the present invention.

[0040] Figure 4 This is a schematic diagram of the air extraction and inflation mechanism and the air jet adhesive spraying mechanism of the present invention.

[0041] In the diagram: 1. Conveying mechanism; 2. Air extraction and inflation mechanism; 3. Air jetting and adhesive spraying mechanism; 4. Adhesive layer; 5. Stacking layer; 6. Nozzle; 7. Swinging device; 8. Lifting device; 9. Air compressor; 10. Second pressure gauge; 11. Inlet valve; 12. Outlet valve; 13. Inflation pipe; 14. Carbon dioxide cylinder; 15. Acquisition device; 16. Feed valve; 17. Air pump; 18. First pressure gauge; 19. Air extraction pipe; 20. Third pressure gauge. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figures 1-4This invention provides a coal-based solid waste treatment device, comprising:

[0045] Conveying mechanism 1 is used to transfer coal-based solid waste to the goaf and unload the coal-based solid waste;

[0046] The jet spraying and adhesive spraying mechanism 3 is used to blow down and pile up the coal-based solid waste unloaded by the conveying mechanism 1 to form a pile layer 5 and to spray an adhesive layer 4 that can cover the pile layer 5 onto the pile layer 5.

[0047] The air extraction and inflation mechanism 2 is used to extract air from the stacked layer 5 and to fill the stacked layer 5 with carbon dioxide.

[0048] The coal-based solid waste transported by the conveying mechanism 1 is processed by the jet spraying and adhesive spraying mechanism 3 to form a stacked layer 5 and a cemented layer 4. Multiple layers can be stacked to form an intermittent carbon storage chamber. The stacked layer 5 is then evacuated and filled with carbon dioxide by the air extraction and filling mechanism 2. This process can treat large quantities of coal-based solid waste, control surface subsidence and rock strata movement, achieve carbon sequestration, expand CO2 treatment pathways, and help achieve the "dual carbon" goal.

[0049] In one embodiment of the present invention, the jet adhesive spraying mechanism 3 includes:

[0050] Air compressor 9;

[0051] Nozzle 6 is connected to the output end of air compressor 9;

[0052] The feed valve 16 is connected to the nozzle 6.

[0053] The nozzle 6 has three adjustable discharge diameters. The spraying pressure is adjusted by the air compressor 9. The nozzle 6 can spray high-pressure air generated by the air compressor 9, which can evenly blow down coal-based solid waste to form a pile layer 5. The feed valve 16 is switched to switch between spraying and air spraying states. The feed valve 16 supplies cementing material into the nozzle 6, and the nozzle 6 sprays out cementing material to form a cementing layer 4 on the pile layer 5.

[0054] Furthermore, the binder is a fast-setting material, which can quickly bond together, preventing carbon dioxide leakage while reducing the impact on production.

[0055] Furthermore, the thickness of the deposited layer 5 is 0.7m, and the thickness of the cementing layer 4 is 0.1m.

[0056] In one embodiment of the present invention, the jet adhesive spraying mechanism 3 further includes:

[0057] Lifting device 8; the lifting device 8 is preferably a cylinder.

[0058] The swing device 7 is connected to the output end of the lifting device 8 and is also connected to the nozzle 6. The swing device 7 is preferably a universal rotator.

[0059] The swing device 7 and the lifting device 8 can adjust the angle and amplitude of the nozzle 6.

[0060] In one embodiment of the present invention, the air extraction and inflation mechanism 2 includes:

[0061] Air pump 17;

[0062] The air extraction pipe 19 is connected to the air pump 17;

[0063] The first pressure gauge 18 is installed on the suction pipe 19.

[0064] Air pump 17 and air extraction pipe 19 are used to extract air from the stack layer 5.

[0065] Furthermore, two rows of small holes spaced 0.07m apart are arranged within a 0.7m range from the end of the extraction pipe 19.

[0066] In one embodiment of the present invention, the air extraction and inflation mechanism 2 further includes:

[0067] Carbon dioxide cylinder 14 is equipped with an inlet valve 11;

[0068] The inflation pipe 13 is connected to the carbon dioxide cylinder 14, and the inflation pipe 13 is equipped with an outlet valve 12.

[0069] The second pressure gauge 10 is installed on the carbon dioxide cylinder 14;

[0070] The third pressure gauge 20 is installed on the inflation tube 13.

[0071] Carbon dioxide cylinder 14 is used to store gas, second pressure gauge 10 is used to detect internal pressure and determine the remaining carbon dioxide, inlet valve 11 is used to replenish carbon dioxide, and outlet valve 12 can control the output of carbon dioxide.

[0072] Furthermore, two rows of small holes spaced 0.07m apart are arranged within a 0.7m range from the end of the air inflator 13.

[0073] In one embodiment of the present invention, a acquiring device 15 is further included for acquiring the thickness values ​​of the deposited layer 5 and the adhesive layer 4.

[0074] The acquisition device 15 is an infrared sensor. It stops feeding after determining that the thickness of the stacked layer 4 reaches 0.7m, and stops feeding after determining that the thickness of the adhesive layer 4 reaches 0.1m.

[0075] In one embodiment of the present invention, the conveying mechanism 1 is a perforated bottom-discharge scraper conveyor.

[0076] The present invention also provides a method for treating coal-based solid waste, comprising the following steps:

[0077] The coal-based solid waste is transferred to the goaf and unloaded by the conveying mechanism 1;

[0078] The coal-based solid waste unloaded by the conveying mechanism 1 is blown down and piled up by the jet spraying and adhesive spraying mechanism 3 to form a pile layer 5, and an adhesive layer 4 that can cover the pile layer 5 is sprayed on the pile layer 5.

[0079] The air is extracted from the stack layer 5 by the air extraction and inflation mechanism 2, and carbon dioxide is injected into the stack layer 5.

[0080] In one embodiment of the present invention, after spraying an adhesive layer 4 capable of covering the stacked layer 5 onto the stacked layer 5, the method further includes:

[0081] The next stacked layer 5 is blown off and stacked onto the cementing layer 4 on the previous stacked layer 5, so that the multi-layered stacked layers 5 and the cementing layer 4 are spaced apart.

[0082] In one embodiment of the present invention, when filling the stacked layer 5 with carbon dioxide, the method further includes:

[0083] When air is extracted from the previous layer 5, carbon dioxide is introduced into the previous layer 5.

[0084] Furthermore, if the reading of the first pressure gauge 18 can be reduced to 0 MPa, it indicates that the sealing performance of the cement layer 4 is good. If the reading of the first pressure gauge 18 is difficult to be reduced to 0 MPa, it indicates that the sealing performance of the cement layer 4 is poor. The gauge is then opened again for additional grouting until the reading of the first pressure gauge 18 drops to 0 MPa. Carbon dioxide is then injected into the stacked layer 5 until the pressure inside the stacked layer 5 reaches 1 MPa. Finally, the vent valve 12 is closed.

[0085] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 invention.

[0086] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A coal-based solid waste treatment device, characterized in that, include: The conveying mechanism (1) is used to transfer coal-based solid waste to the goaf and unload the coal-based solid waste; The jet spraying mechanism (3) is used to blow down and pile up the coal-based solid waste unloaded by the conveying mechanism (1) to form a pile layer (5) and to spray a cementing layer (4) that can cover the pile layer (5) on the pile layer (5). The pile layer (5) and the cementing layer (4) are stacked in multiple layers to form an intermittent carbon storage cavity. The air extraction and inflation mechanism (2) is used to extract air from the stacked layer (5) and to fill the stacked layer (5) with carbon dioxide.

2. The coal-based solid waste treatment device according to claim 1, characterized in that, The jet spraying adhesive mechanism (3) includes: Air compressor (9); The nozzle (6) is connected to the output end of the air compressor (9); The feed valve (16) is connected to the nozzle (6).

3. The coal-based solid waste treatment device according to claim 2, characterized in that, The jet spraying adhesive mechanism (3) also includes: Lifting device (8); The swing device (7) is connected to the output end of the lifting device (8), and the swing device (7) is connected to the nozzle (6).

4. The coal-based solid waste treatment device according to claim 1, characterized in that, The air extraction and inflation mechanism (2) includes: Air pump (17); The air extraction pipe (19) is connected to the air pump (17); The first pressure gauge (18) is installed on the suction pipe (19).

5. The coal-based solid waste treatment device according to claim 1, characterized in that, The air extraction and inflation mechanism (2) further includes: A carbon dioxide cylinder (14) is equipped with an inlet valve (11). An inflation tube (13) is connected to the carbon dioxide cylinder (14), and an outlet valve (12) is provided on the inflation tube (13). A second pressure gauge (10) is installed on the carbon dioxide cylinder (14); The third pressure gauge (20) is installed on the inflation tube (13).

6. The coal-based solid waste treatment device according to claim 1, characterized in that, It also includes a receiving device (15) for receiving the thickness values ​​of the stacked layer (5) and the adhesive layer (4).

7. The coal-based solid waste treatment device according to claim 1, characterized in that, The conveying mechanism (1) is a multi-hole bottom-discharge scraper conveyor.

8. A method for treating coal-based solid waste, based on the coal-based solid waste treatment device according to any one of claims 1-7, characterized in that, Includes the following steps: The coal-based solid waste is transferred to the goaf and unloaded by the conveying mechanism (1); The coal-based solid waste unloaded by the conveying mechanism (1) is blown down and piled up by the jet spraying mechanism (3) to form the pile layer (5), and a cementing layer (4) that can cover the pile layer (5) is sprayed on the pile layer (5). The air is extracted from the stacked layer (5) by the air extraction and inflation mechanism (2), and carbon dioxide is injected into the stacked layer (5).

9. A method for treating coal-based solid waste according to claim 8, characterized in that, After spraying an adhesive layer (4) that covers the stacked layer (5) onto the stacked layer (5), the method further includes: The next stacked layer (5) is blown off and deposited onto the cemented layer (4) on the previous stacked layer (5).

10. A method for treating coal-based solid waste according to claim 8, characterized in that, When filling the stacked layer (5) with carbon dioxide, the method further includes: When air is extracted from the stacked layer (5), carbon dioxide is introduced into the previous stacked layer (5).

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