Coal-based solid waste treatment device and treatment method

Abstract

The invention relates to the technical field of negative carbon filling, and discloses a coal-based solid waste treatment device and method.The coal-based solid waste treatment device comprises a conveying mechanism used for transferring coal-based solid waste to a goaf and unloading the coal-based solid waste; the air and glue spraying mechanism is used for blowing off and stacking the coal-based solid waste discharged by the conveying mechanism to form a stacking layer and spraying a cementing layer capable of covering the stacking layer on the stacking layer; according to the coal-based solid waste treatment device, the effects of treating a large amount of coal-based solid waste and controlling surface subsidence and rock stratum movement can be achieved, carbon sequestration is achieved, the carbon dioxide treatment way is expanded, and the dual-carbon target can be achieved in an assisting mode.

Description

Technical Field

[0001] The present invention relates to the technical field of negative carbon filling, and in particular to a coal-based solid waste treatment device and a treatment method. Background Art

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

[0003] In order to reduce the impact of mining activities on the environment, solid filling mining has become an important means of coal mining. Under the "dual carbon" goal, various concepts and technologies of low carbon, zero carbon and even negative carbon have been proposed, but currently the main location for carbon sequestration is post-mining oil and gas fields with good geological cover. The application of this technology in coal mines is still in the exploratory stage. Therefore, a coal-based solid waste treatment device and treatment method are urgently needed. Summary of the invention

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

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

[0006] A conveying mechanism, used for transporting coal-based solid waste to the goaf and unloading the coal-based solid waste;

[0007] An air jet glue spraying mechanism, used for blowing the coal-based solid waste discharged by the conveying mechanism to form an accumulation layer and spraying a cementing layer on the accumulation layer that can cover the accumulation layer;

[0008] The air extraction and inflation mechanism is used to extract the air in the accumulation layer and to fill the accumulation layer with carbon dioxide.

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

[0010] Air compressor;

[0011] A nozzle connected to an output end of the air compressor;

[0012] A feed valve is connected with the nozzle.

[0013] Optionally, the jet glue 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 pumping and inflating mechanism comprises:

[0017] air pump;

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

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

[0020] Optionally, the air pumping and inflating mechanism further includes:

[0021] A carbon dioxide gas cylinder provided with an air inlet valve;

[0022] An air filling pipe connected to the carbon dioxide cylinder, wherein an air outlet valve is provided on the air filling pipe;

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

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

[0025] Optionally, it also includes an acquisition device for acquiring the thickness values ​​of the accumulation layer and the bonding layer.

[0026] Optionally, the conveying mechanism is a porous 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 transport the coal-based solid waste to the goaf and unload it;

[0029] The jet glue spraying mechanism blows the coal-based solid waste discharged from the conveying mechanism down and accumulates it to form the accumulation layer, and sprays a bonding layer capable of covering the accumulation layer on the accumulation layer;

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

[0031] Optionally, after spraying a binder layer capable of covering the stacking layer on the stacking layer, the method further comprises:

[0032] The next accumulation layer is blown down and accumulated on the bonding layer on the previous accumulation layer.

[0033] Optionally, when the carbon dioxide is filled into the stacking layer, the method further comprises:

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

[0035] The present invention discloses the following technical effects: the coal-based solid waste transported by the conveying mechanism is processed by the jet spraying mechanism to form an accumulation layer and a cementation layer, and can be stacked in multiple layers to form an interval carbon storage cavity, and the accumulation layer is extracted with air and filled with carbon dioxide by the vacuum and inflation mechanism, which can achieve the effect of processing large amounts of coal-based solid waste, controlling surface subsidence and rock movement, realizing carbon sequestration, expanding the carbon dioxide treatment path, and helping to achieve the "dual carbon" goal. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1 It is a schematic diagram of a processing device when a deposited layer is formed according to the present invention;

[0038] Figure 2 It is a schematic diagram of the processing device when the bonding layer is formed in the present invention;

[0039] Figure 3 It is a schematic diagram of the processing device for extracting air from the accumulation layer and charging carbon dioxide in the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the air suction and inflation mechanism and the air jet glue spraying mechanism of the present invention.

[0041] In the figure: 1. conveying mechanism; 2. vacuum and inflation mechanism; 3. jet glue spraying mechanism; 4. adhesive layer; 5. accumulation layer; 6. nozzle; 7. swing device; 8. lifting device; 9. air compressor; 10. second pressure gauge; 11. air inlet valve; 12. air outlet valve; 13. inflation pipe; 14. carbon dioxide cylinder; 15. acquisition device; 16. feed valve; 17. air pump; 18. first pressure gauge; 19. vacuum pipe; 20. third pressure gauge. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figure 1-Figure 4The present invention provides a coal-based solid waste treatment device, comprising:

[0045] The conveying mechanism 1 is used for transporting the coal-based solid waste to the goaf and unloading the coal-based solid waste;

[0046] The jet glue spraying mechanism 3 is used for blowing the coal-based solid waste discharged by the conveying mechanism 1 to form a stacking layer 5 and spraying a bonding layer 4 on the stacking layer 5 so as to cover the stacking layer 5;

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

[0048] The coal-based solid waste transported by the conveying mechanism 1 is processed by the jet spraying mechanism 3 to form an accumulation layer 5 and a cementing layer 4, and can be stacked in multiple layers to form an intervening carbon storage cavity. The accumulation layer 5 is air extracted and carbon dioxide is injected by the vacuum and inflation mechanism 2, which can achieve the effect of processing large amounts of coal-based solid waste, controlling surface subsidence and rock movement, realizing carbon sequestration, and expanding the CO2 treatment path, which can help achieve the "dual carbon" goal.

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

[0050] Air compressor 9;

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

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

[0053] The discharge diameter of the nozzle 6 is adjustable in three gears, and the spraying pressure is adjusted by the air compressor 9. The nozzle 6 can spray out the high-pressure air produced by the air compressor 9, so that the coal-based solid waste can be evenly blown down to form an accumulation layer 5. The feed valve 16 is switched to switch the spraying state and the jet state, and the binder is supplied to the nozzle 6 through the feed valve 16, and the binder is sprayed out by the nozzle 6 to form a binder layer 4 on the accumulation layer 5.

[0054] Furthermore, the binder is a quick-setting material, which can quickly bind to prevent carbon dioxide from overflowing while reducing the impact on production.

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

[0056] In one embodiment of the present invention, the jet glue 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 the swing device 7 is 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 pumping and inflating mechanism 2 comprises:

[0061] Air pump 17;

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

[0063] The first pressure gauge 18 is disposed on the exhaust pipe 19 .

[0064] The air pump 17 and the air extraction pipe 19 are used to extract the air in the accumulation layer 5 .

[0065] Furthermore, two rows of small holes with a spacing of 0.07 m are arranged within 0.7 m from the end of the exhaust pipe 19 .

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

[0067] A carbon dioxide gas cylinder 14 is provided with an air inlet valve 11;

[0068] A gas filling pipe 13 is connected to a carbon dioxide gas cylinder 14, and a gas outlet valve 12 is provided on the gas filling pipe 13;

[0069] A second pressure gauge 10 is provided on the carbon dioxide cylinder 14;

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

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

[0072] Furthermore, two rows of small holes with a spacing of 0.07 m are arranged within 0.7 m from the end of the inflation tube 13 .

[0073] In one embodiment of the present invention, it also includes an acquisition device 15 for acquiring the thickness values ​​of the accumulation layer 5 and the bonding layer 4.

[0074] The acquisition device 15 is an infrared sensor. After determining that the thickness of the accumulation layer 4 has reached 0.7m, the material dropping is stopped. After determining that the thickness of the bonding layer 4 has reached 0.1m, the material dropping is stopped.

[0075] In one embodiment of the present invention, the conveying mechanism 1 is a porous bottom-discharging 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 transported to the goaf and unloaded by the conveying mechanism 1;

[0078] The coal-based solid waste discharged from the conveying mechanism 1 is blown down and piled up by the jet glue spraying mechanism 3 to form a pile layer 5, and a cementing layer 4 capable of covering the pile layer 5 is sprayed on the pile layer 5;

[0079] The air in the accumulation layer 5 is extracted by the air exhaust and air filling mechanism 2 , and carbon dioxide is filled into the accumulation layer 5 .

[0080] In one embodiment of the present invention, after spraying the adhesive layer 4 capable of covering the accumulation layer 5 on the accumulation layer 5, the method further comprises:

[0081] The next stacking layer 5 is blown down and stacked on the bonding layer 4 on the previous stacking layer 5, so that the multiple stacking layers 5 and the bonding layer 4 are arranged at intervals.

[0082] In one embodiment of the present invention, when the accumulation layer 5 is filled with carbon dioxide, the method further comprises:

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

[0084] Furthermore, if the reading of the first pressure gauge 18 can drop to 0MPa, it indicates that the sealing of the bonding layer 4 is good. If the reading of the first pressure gauge 18 is difficult to drop to 0MPa, it indicates that the sealing of the bonding layer 4 is poor. Open it again for supplementary spraying until the reading of the first pressure gauge 18 drops to 0Mpa. When carbon dioxide is injected into the accumulation layer 5, the pressure in the accumulation layer 5 reaches 1MPa, and then the outlet valve 12 is closed.

[0085] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0086] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A coal-based solid waste treatment device, characterized in that: include: A conveying mechanism (1) is used to transport the coal-based solid waste to the goaf and unload the coal-based solid waste; An air jet glue spraying mechanism (3) is used to blow the coal-based solid waste discharged by the conveying mechanism (1) down and accumulate to form an accumulation layer (5) and to spray a bonding layer (4) on the accumulation layer (5) that can cover the accumulation layer (5); The air extraction and inflation mechanism (2) is used to extract air from the accumulation layer (5) and to inject carbon dioxide into the accumulation layer (5).

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

3. A coal-based solid waste treatment device according to claim 2, characterized in that: The jet glue spraying mechanism (3) further comprises: 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. A coal-based solid waste treatment device according to claim 1, characterized in that: The air pumping and charging mechanism (2) comprises: Air pump (17); An air extraction pipe (19) connected to the air pump (17); The first pressure gauge (18) is arranged on the air extraction pipe (19).

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

6. A coal-based solid waste treatment device according to claim 1, characterized in that: It also includes an acquisition device (15) for acquiring the thickness values ​​of the accumulation layer (5) and the bonding layer (4).

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

8. A method for treating coal-based solid waste, based on the method for treating coal-based solid waste according to any one of claims 1 to 7, characterized in that: The following steps are involved: The conveying mechanism (1) transports the coal-based solid waste to the goaf and unloads it; The jet glue spraying mechanism (3) blows the coal-based solid waste discharged from the conveying mechanism (1) down and accumulates to form the accumulation layer (5), and sprays a bonding layer (4) capable of covering the accumulation layer (5) on the accumulation layer (5); The air in the accumulation layer (5) is extracted by the air suction and inflation mechanism (2), and carbon dioxide is injected into the accumulation layer (5).

9. A method for treating coal-based solid waste according to claim 8, characterized in that: After spraying the adhesive layer (4) capable of covering the accumulation layer (5) on the accumulation layer (5), the method further comprises: The next stacking layer (5) is blown down and stacked on the bonding layer (4) on the previous stacking layer (5).

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

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