Coal-based solid waste negative carbon underground filling device

Abstract

The invention provides a coal-based solid waste negative carbon underground filling device which comprises a material barrel, a feeding port penetrating through the side wall is formed in the side wall of the top of the material barrel, and a jet flow mixing feeding unit is arranged on the outer side of the feeding port; a first stirring assembly and a second stirring assembly are sequentially arranged in the material barrel from top to bottom, and the top of the second stirring assembly is fixedly connected with the bottom of the first stirring assembly; the first stirring assembly comprises a first stirring barrel, the outer side wall of the top of the first stirring barrel is fixedly connected with the inner side wall of the material barrel, a first stirring mechanism is arranged in the first stirring barrel, a first rotary opening and closing assembly is arranged at the bottom of the first stirring barrel, and the first rotary opening and closing assembly is fixedly connected with the inner side wall of the material barrel; a discharging port is further formed in the bottom of the material barrel, and a discharging unit is further arranged on the outer side of the discharging port. The device provided by the invention can realize full mixing of CO2, an aqueous solution and coal-based solid powder, so that the mixed slurry can be used for filling and sealing up a goaf at one time, and the operation is simplified.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground filling, involves CO2 sequestration, and specifically relates to a coal-based solid waste negative-carbon underground filling device. Background Art

[0002] As an accessory solid waste generated during coal mining, coal gangue has the characteristics of a huge stockpile and a significant increase. Long-term surface stacking causes harmful heavy metal elements in coal gangue to diffuse into the atmosphere and water bodies, seriously damaging the ecological environment and threatening the health of residents. Therefore, realizing the large-scale disposal of coal gangue is of great significance. Currently, using the filling mining technology to make coal gangue into filling slurry and transporting it to the underground goaf to form a filling body is an important way to utilize coal gangue on a large scale.

[0003] In the prior art, the technology of using coal gangue to fill the goaf and sequester CO2 uses coal gangue, that is, coal-based solid powder, as a raw material to prepare a filling material, transport it to the goaf for filling, and then inject CO2 for sequestration. This makes it necessary to first perform filling and then sequester CO2 when filling the goaf, and the operation is relatively cumbersome. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a coal-based solid waste negative-carbon underground filling device to solve the technical problem that the coal-based solid waste filling device in the prior art is difficult to achieve the negative-carbon function.

[0005] To solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0006] A coal-based solid waste negative-carbon underground filling device includes a material cylinder. A feed port penetrating the side wall is provided on the top side wall of the material cylinder, and a jet mixing feed unit is arranged outside the feed port.

[0007] A first stirring assembly and a second stirring assembly are sequentially arranged inside the material cylinder from top to bottom, and the top of the second stirring assembly is fixedly connected to the bottom of the first stirring assembly.

[0008] The first stirring assembly includes a first stirring cylinder. The first stirring cylinder and the material cylinder are coaxially arranged. The outer side wall of the top of the first stirring cylinder is fixedly connected to the inner side wall of the material cylinder. A first stirring mechanism is arranged inside the first stirring cylinder, and a first rotary opening and closing assembly is arranged at the bottom of the first stirring cylinder. The first rotary opening and closing assembly is fixedly connected to the inner side wall of the material cylinder.

[0009] The structure of the second stirring assembly is the same as that of the first stirring assembly.

[0010] A second CO₂ inlet is also provided on the side wall of the material cylinder, and the second CO₂ inlet is arranged between the first stirring assembly and the second stirring assembly.

[0011] A flue gas discharge port is also provided at the top of the material cylinder, a feeding port is also provided at the top of the material cylinder, a discharge port is provided at the bottom of the material cylinder, and a discharging unit is arranged outside the discharge port.

[0012] The present invention also has the following technical features:

[0013] Preferably, the shape of the first stirring cylinder is an inverted frustum of a cone, the inside of the first stirring cylinder is hollow and both ends are open.

[0014] The first stirring cylinder is located below the feeding port.

[0015] The first stirring mechanism includes a first rotating shaft, the first rotating shaft is coaxially arranged with the material cylinder, the first rotating shaft can be driven by a first stirring motor arranged at the top of the first rotating shaft, the side wall of the first stirring motor is fixedly connected with one end of a plurality of first stirring motor connecting rods along the circumferential direction, and the other end of each first stirring motor connecting rod is fixedly connected with the inner side wall of the material cylinder.

[0016] A plurality of stirring shafts are evenly arranged along the circumferential direction on the first rotating shaft, each stirring shaft is arranged along the radial direction of the first rotating shaft, one end of each stirring shaft is fixedly connected with the first rotating shaft, a stirring scraper is arranged at the other end of each stirring shaft, and each stirring scraper is in sliding contact with the inner side wall of the first stirring cylinder respectively.

[0017] A plurality of stirring blades are also evenly arranged along the circumferential direction at the bottom of the first rotating shaft.

[0018] Specifically, the first rotary opening and closing assembly includes a mounting disc arranged in the horizontal direction, the mounting disc is coaxially arranged at the bottom of the first stirring cylinder, and the outer side wall of the mounting disc is fixedly connected with the inner side wall of the material cylinder.

[0019] A plurality of lower sliding through grooves are evenly arranged along the circumferential direction on the mounting disc, one end of each lower sliding through groove is close to the center of the mounting disc, the other end of each lower sliding through groove is far away from the center of the mounting disc, and a mounting disc discharge port is also opened at the center of the mounting disc.

[0020] A closing assembly is also coaxially arranged on the mounting disc, and the closing assembly is slidably connected with the lower sliding through grooves on the mounting disc.

[0021] An installation ring is also coaxially arranged on the described closing assembly. An integrated first gear track is also circumferentially arranged on the inner side surface of the installation ring. A linkage assembly is also coaxially arranged inside the installation ring. The linkage assembly is fixedly connected to the first gear track, and the linkage assembly is also slidably connected to the closing assembly. The top of the linkage assembly contacts the bottom of the first mixing drum.

[0022] A second motor is arranged on the outer side surface of the bottom of the described first mixing drum. The output shaft of the second motor is connected to a horizontally arranged first gear. The output shaft of the second motor can drive the first gear, and the first gear also meshes with the first gear track.

[0023] Specifically, the described linkage assembly includes a connecting ring. The connecting ring is coaxially arranged with the installation ring. A plurality of pull rods are evenly circumferentially arranged on the connecting ring. One end of each pull rod is fixedly connected to the outer side surface of the connecting ring, and the other end of each pull rod is fixedly connected to the bottom of the first gear track.

[0024] An upper sliding through groove is also opened at one end of each pull rod close to the first gear track. Each upper sliding through groove corresponds to each lower sliding through groove one by one.

[0025] Specifically, the described closing assembly includes a plurality of plugging plates that are petal-shaped and horizontally arranged. The plurality of plugging plates are circumferentially arranged. Every two plugging plates are adjacent and in contact. The top of each plugging plate contacts the bottom of the connecting ring, and the bottom of each plugging plate contacts the top of the installation disc.

[0026] An upper sliding column is also respectively arranged on the top of each plugging plate. The plurality of upper sliding columns correspond to the plurality of upper sliding through grooves one by one. Each upper sliding column is slidably connected to each upper sliding through groove.

[0027] A lower sliding column is also respectively arranged on the bottom of each plugging plate. The plurality of lower sliding columns correspond to the plurality of lower sliding through grooves one by one. Each lower sliding column is slidably connected to each lower sliding through groove.

[0028] Specifically, the described second stirring assembly includes a second rotating shaft. The second rotating shaft is coaxially arranged with the material cylinder. The second rotating shaft can be driven by a second stirring motor arranged at the top of the second rotating shaft. The side wall of the second stirring motor is fixedly connected to one end of a plurality of second stirring motor connecting rods circumferentially. The other end of each second stirring motor connecting rod is fixedly connected to the bottom of the first rotary opening and closing assembly.

[0029] The described second stirring assembly also includes a second rotary opening and closing assembly. The structure of the second rotary opening and closing assembly is the same as the structure of the first rotary opening and closing assembly.

[0030] Preferably, the jet mixing feeding unit includes a first connection cylinder communicating with the feeding port. One end of the first connection cylinder is fixedly connected to the outer side wall of the material cylinder. The other end of the first connection cylinder is rotatably connected and communicates with one end of the first rotating cylinder. The other end of the first rotating cylinder is rotatably connected and communicates with one end of the second connection cylinder. The other end of the second connection cylinder is rotatably connected and communicates with one end of the second rotating cylinder. The other end of the second rotating cylinder is rotatably connected and communicates with one end of the feeding cylinder. The other end of the feeding cylinder is closed. A coal-based solid powder inlet is provided on the other end of the feeding cylinder. A first CO2 inlet is also provided on the other end of the feeding cylinder. An aqueous solution inlet is further provided on the top side wall of the feeding cylinder.

[0031] A first circulation port is also provided on the material cylinder. A mixing cylinder circulation port is also provided on the first mixing cylinder. A second circulation port is also provided on the bottom side wall of the second connection cylinder. The position of the second circulation port on the second connection cylinder is fixedly connected to one end of the circulation pipe. One end of the circulation pipe communicates with the first circulation port and the mixing cylinder circulation port. The other end of the circulation pipe is fixedly connected to the position of the first circulation port on the material cylinder.

[0032] Specifically, a first spiral input rod is coaxially arranged and fixedly connected inside the second rotating cylinder.

[0033] A double-headed motor is also provided on the outer side wall of the second connection cylinder. A second gear is provided on one output shaft of the double-headed motor. A third gear is provided on the other output shaft of the double-headed motor. A second gear track is coaxially sleeved on the outer side wall of the first rotating cylinder. The second gear track can be meshed with the second gear. A third gear track is coaxially sleeved and fixedly connected on the outer side wall of the second rotating cylinder. The third gear track can be meshed with the third gear.

[0034] A plurality of groups of parallel rotating crushing components are provided on the inner side wall of the first rotating cylinder. Each group of rotating crushing components is evenly arranged along the circumferential direction of the first rotating cylinder.

[0035] Preferably, the rotating crushing component includes an arc-shaped fixing plate. The arc-shaped fixing plate is perpendicular to and fixedly connected to the inner side wall of the first rotating cylinder. One end of the side wall of the arc-shaped fixing plate is rotatably connected to one end of the mixing blade connecting shaft. The mixing blade connecting shaft is also coaxially sleeved and fixedly connected with a fourth gear. The other end of the mixing blade connecting shaft is also coaxially sleeved and fixedly connected with a mounting head. A plurality of rotating fan blades are evenly arranged along the circumferential direction on the outer side wall of the mounting head. One end of each rotating fan blade is fixedly connected to the mounting head. A mixing blade is also provided at the other end of each rotating fan blade.

[0036] A gear protection plate is also coaxially sleeved on the inner side wall of the second gear track. The outer side wall of the gear protection plate is fixedly connected to the inner side wall of the second gear track, and the inner side wall of the gear protection plate is fixedly connected to the outer side wall of the first rotating cylinder. A fourth gear track is also circumferentially arranged on the inner side wall of the gear protection plate, and multiple fourth gear tracks correspond to multiple groups of rotary crushing components one by one.

[0037] Multiple groups of fifth gears are also arranged on the outer side wall of the first rotating cylinder. Each group of fifth gears is evenly arranged along the circumference of the first rotating cylinder, and multiple fifth gears correspond to multiple groups of rotary crushing components one by one. The outer side wall of the first rotating cylinder is also fixedly connected to multiple third motors arranged in parallel. The output end of each third motor can drive one in each group of fifth gears, and each group of fifth gears meshes with each fourth gear track.

[0038] A belt through hole is also opened at each fifth gear of the first rotating cylinder. A belt penetrates through each belt through hole, and each fifth gear can drive the fourth gear to rotate through the belt.

[0039] Preferably, the discharging unit includes a first discharging pipe, which is communicated with the discharging port. The first discharging pipe is fixedly connected to the outer side wall of the material cylinder. A fourth motor is also fixedly connected to the outer side wall of the first discharging pipe. A main discharging port gear is arranged on the output shaft of the fourth motor, and the fourth motor can drive the main discharging port gear.

[0040] A second discharging pipe is also coaxially arranged at the bottom of the first discharging pipe. A fixing ring is coaxially installed between the first discharging pipe and the second discharging pipe. The inner diameter of the fixing ring is smaller than the outer diameters of the first discharging pipe and the second discharging pipe, so that the first discharging pipe and the second discharging pipe axially limit the fixing ring.

[0041] A sixth gear is also integrally and coaxially arranged on the outer side wall of the fixing ring. The sixth gear is meshed and driven by the main discharging port gear; so that the fixing ring can rotate circumferentially with the central axis of the first discharging pipe as the rotation axis.

[0042] The thickness of the sixth gear is greater than the thickness of the fixing ring. The upper inner ring of the sixth gear is sleeved on the bottom of the first discharging pipe, and the lower inner ring of the sixth gear is sleeved on the top of the second discharging pipe, realizing the radial limit of the fixing ring.

[0043] A second spiral input rod is also coaxially arranged inside the first discharging pipe. Multiple spiral fixing rods are circumferentially arranged on the outer side wall of the bottom of the central axis of the second spiral input rod. One end of each spiral fixing rod is fixedly connected to the outer side wall of the bottom of the central axis of the second spiral input rod, and the other end of each spiral fixing rod is fixedly connected to the inner side wall of the fixing ring.

[0044] Compared with the prior art, the present invention has the following technical effects:

[0045] (Ⅰ) The device in the present invention can achieve the full mixing of CO2, aqueous solution and coal-based solid powder, and then can use the mixed slurry to fill and seal the gob area at one time, simplifying the operation. The device can convert the coal-based solid powder into a filling slurry with stable quality, which not only solves the problem of the storage of coal-based solid powder, but also improves the resource recycling rate, and can ensure that the filling material can meet the requirements of gob backfilling.

[0046] (Ⅱ) The device in the present invention can use the first stirring component to stir and mix the slurry injected into the material cylinder through the first stirring component and the second stirring component. The mixed slurry is further stirred and mixed through the second stirring component to achieve full mixing of the slurry; through the design of the stirring scraper and the stirring fan blade, it can not only prevent the slurry from adhering to the inner wall of the stirring cylinder, but also avoid the accumulation of the slurry at the lower part of the stirring cylinder, realizing continuous production and ensuring the full mixing of the whole slurry and the sealing of CO2.

[0047] (Ⅲ) The device in the present invention can block the bottoms of the two stirring cylinders respectively through the closing component when the slurry in the two stirring cylinders does not reach the designed mixing time, avoiding the un-mixed slurry from flowing into the lower stirring cylinder or the first discharge pipe; at the same time, when the slurry in the two stirring cylinders reaches the designed mixing time, the bottoms of the two stirring cylinders are connected respectively, so that the mixed slurry flows into the lower stirring cylinder or the first discharge pipe, further ensuring the uniform mixing of the slurry.

[0048] (Ⅳ) The device in the present invention can not only make the CO2 gas, aqueous solution and coal-based solid powder be initially uniformly mixed under the rotation transmission of the first spiral input rod through the jet high-energy mixing unit, but also realize the vortex rotation mixing of the slurry under the rotation of the first rotating cylinder to achieve further uniform mixing; at the same time, under the action of the rotating crushing component, it can not only use the rotating fan blade to stir and mix the mixed liquid again to make the slurry formed by each component be uniformly mixed, but also under the action of the rotating fan blade rotating at high speed, inject the mixed slurry into the material cylinder. At the same time, through the design of the stirring blade, it can also rotate synchronously when the rotating fan blade rotates at high speed, so as to rotate and crush the small pieces of coal-based solid powder in the slurry to achieve more uniform mixing of the slurry.

[0049] (V) In the device of the present invention, through the jet high-energy mixing unit, the mixed material of CO2 gas, aqueous solution and coal-based solid powder can only pass through the second rotating cylinder and the first rotating cylinder in sequence and be fully mixed under the transmission of the specific-direction rotating force of the first spiral input rod and the specific-direction rotating force of the first rotating cylinder, and then be sprayed into the material cylinder and the first stirring cylinder, and cannot flow back reversely into the feeding cylinder.

[0050] (VI) In the device of the present invention, through the circulation pipe, when there is too much slurry in the first stirring cylinder, the excess slurry can be input into the second connection cylinder again through the circulation pipe, and further mixed by the rotary crushing assembly, and then input into the material cylinder; this can not only further mix the slurry evenly, but also ensure the continuous production and realize continuous production.

[0051] (VII) In the device of the present invention, through the discharging unit, the second spiral input rod can be rotated driven by the fourth motor, so that the reaction-mixed slurry can be transported downward in a rotating manner under the action of the spiral force, realizing uniform discharging. Description of the Drawings

[0052] Figure 1 is the overall structural schematic diagram of the device of the present invention.

[0053] Figure 2 is Figure 1 the cross-sectional view of

[0054] Figure 3 is the structural schematic diagram of the first stirring mechanism in the device of the present invention.

[0055] Figure 4 is the structural schematic diagram of the first rotary opening and closing assembly in the device of the present invention.

[0056] Figure 5 is the structural schematic diagram of the mounting plate in the device of the present invention.

[0057] Figure 6 is the top-view structural schematic diagram of the combination of the mounting plate and the closing assembly in the device of the present invention.

[0058] Figure 7 is the bottom-view structural schematic diagram of the combination of the mounting plate and the closing assembly in the device of the present invention.

[0059] Figure 8 is the structural schematic diagram of the closing assembly in the device of the present invention.

[0060] Figure 9 is the structural schematic diagram of the combination of the first gear track and the linkage assembly in the device of the present invention.

[0061] Figure 10Schematic diagram of the combination of the first mixing drum and the first rotary opening and closing assembly in the device of the present invention.

[0062] Figure 11 Schematic diagram of the jet mixing feeding unit in the device of the present invention.

[0063] Figure 12 Cross-sectional view of the jet mixing feeding unit in the device of the present invention.

[0064] Figure 13 is Figure 12 Equal-proportion partial enlarged view at position B in

[0065] Figure 14 is Figure 1 Equal-proportion partial enlarged view at position A in

[0066] Figure 15 Schematic diagram of the combination of the sixth gear, the fixed ring and the second spiral input rod in the device of the present invention.

[0067] The meanings of each label in the figure are as follows: 1 - material cylinder, 2 - jet mixing feeding unit, 3 - first mixing assembly, 4 - second mixing assembly, 5 - discharging unit, 6 - material cylinder support leg.

[0068] 101 - feeding port, 102 - second CO2 inlet, 103 - flue gas discharge port, 104 - feeding opening, 105 - discharging port, 106 - first circulation port.

[0069] 201 - first connecting cylinder, 202 - first rotating cylinder, 203 - second connecting cylinder, 204 - second rotating cylinder, 205 - feeding cylinder, 206 - second circulation port, 207 - circulation pipe, 208 - first spiral input rod, 209 - double-headed motor, 210 - second gear, 211 - third gear, 212 - second gear track, 213 - third gear track, 214 - rotary crushing assembly, 216 - gear protection plate, 217 - fourth gear track, 218 - fifth gear, 219 - third motor, 220 - belt through hole, 221 - belt.

[0070] 301 - first mixing drum, 302 - first mixing mechanism, 303 - first rotary opening and closing assembly, 304 - mixing drum circulation port.

[0071] 401 - second rotating shaft, 402 - second mixing motor, 403 - second mixing motor connecting rod, 404 - second rotary opening and closing assembly.

[0072] 501 - first discharging pipe, 502 - fourth motor, 503 - discharging port main gear, 504 - fixed ring, 505 - sixth gear, 506 - second spiral input rod, 507 - spiral fixing rod, 508 - second discharging pipe.

[0073] 20501 - Coal - based solid powder inlet, 20502 - First CO2 inlet, 20503 - Aqueous solution inlet.

[0074] 21401 - Arc - shaped fixing plate, 21402 - Stirring blade connecting shaft, 21403 - Fourth gear, 21404 - Mounting head, 21405 - Rotating fan blade, 21406 - Stirring blade.

[0075] 30201 - First rotating shaft, 30202 - First stirring motor, 30203 - Stirring shaft, 30204 - Stirring scraper, 30205 - Stirring air blade, 30206 - Connecting rod of the first stirring motor.

[0076] 30301 - Mounting plate, 30302 - Closing assembly, 30303 - Mounting ring, 30304 - First gear track, 30305 - Linkage assembly, 30306 - Second motor, 30307 - First gear.

[0077] 3030101 - Lower sliding through - slot, 3030102 - Discharge port of the mounting plate.

[0078] 3030201 - Plugging plate, 3030202 - Upper sliding column, 3030203 - Lower sliding column.

[0079] 3030501 - Connecting ring, 3030502 - Pull rod, 3030503 - Upper sliding through - slot.

[0080] The following further elaborates on the specific content of the present invention in conjunction with the accompanying drawings and embodiments. Detailed implementation manners

[0081] It should be noted that all components and materials in the present invention, unless otherwise specified, are all components and materials known in the prior art. For example, the material cylinder is a known material cylinder, and the first stirring motor is a known first stirring motor.

[0082] Following the above - mentioned technical solutions, the following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present invention.

[0083] Embodiment:

[0084] This embodiment provides a coal - based solid waste negative - carbon underground filling device, as Figure 1 shown, including a material cylinder 1. A feed port 101 penetrating the side wall is provided on the top side wall of the material cylinder 1, and a jet - mixing feeding unit 2 is arranged outside the feed port 101.

[0085] AsFigure 2 As shown in the figure, a first stirring assembly 3 and a second stirring assembly 4 are sequentially arranged inside the material cylinder 1 from top to bottom, and the top of the second stirring assembly 4 is fixedly connected to the bottom of the first stirring assembly 3.

[0086] As Figure 2 shown in the figure, the first stirring assembly 3 includes a first stirring cylinder 301. The first stirring cylinder 301 and the material cylinder 1 are coaxially arranged. The outer side wall of the top of the first stirring cylinder 301 is fixedly connected to the inner side wall of the material cylinder 1. A first stirring mechanism 302 is arranged inside the first stirring cylinder 301. A first rotary opening and closing assembly 303 is arranged at the bottom of the first stirring cylinder 301, and the first rotary opening and closing assembly 303 is fixedly connected to the inner side wall of the material cylinder 1.

[0087] As Figure 2 shown in the figure, the structure of the second stirring assembly 4 is the same as that of the first stirring assembly 3.

[0088] As Figure 2 shown in the figure, a second CO2 inlet 102 is further opened on the side wall of the material cylinder 1, and the second CO2 inlet 102 is arranged between the first stirring assembly 3 and the second stirring assembly 4.

[0089] As Figure 1 shown in the figure, a flue gas discharge port 103 is further opened at the top of the material cylinder 1, a feeding port 104 is further opened at the top of the material cylinder 1, a discharge port 105 is further opened at the bottom of the material cylinder 1, and a discharge unit 5 is arranged outside the discharge port 105.

[0090] In this embodiment, a flue gas purifier is externally connected to the flue gas discharge port 103, and the flue gas purifier adopts a known flue gas purifier. Through the design of the flue gas discharge port 103, harmful substances in the flue gas generated during the stirring and mixing process of the slurry can be filtered, and then the filtered clean air is discharged into the air to avoid environmental pollution.

[0091] In this embodiment, the combination of the first stirring assembly 3 and the second stirring assembly 4 inside the material cylinder 1 can fully stir the coal-based solid waste solution entering the material cylinder 1, make the coal-based solid waste solution fully mixed and uniform, and form a uniform slurry.

[0092] Moreover, when the first stirring assembly 3 stirs and mixes the slurry evenly, part of the slurry gradually enters the second stirring assembly 4 in the lower layer for further stirring and mixing. In this way, continuous feeding can be achieved in the first stirring cylinder 301, and the slurry that has been preliminarily stirred and mixed in the first stirring cylinder 301 also continuously enters the stirring cylinder in the second stirring assembly 4. At the same time, the slurry that has been stirred and mixed evenly by the stirring cylinder in the second stirring assembly 4 is also continuously discharged through the discharging unit 5. Therefore, the device of the present invention can ensure continuous feeding and discharging on the premise of fully mixing the slurry evenly, achieving the purpose of continuous production, effectively shortening the preparation time, thus quickly transitioning from the mixed slurry to the application stage, and improving the construction efficiency and productivity.

[0093] In addition, the uniform slurry can avoid equipment damage caused by local high concentration or large particles, extending the service life of the equipment. Moreover, the uniform slurry makes the production process easier to control and automate, reducing the need for manual intervention and improving production efficiency.

[0094] In this embodiment, the inner diameters of the first stirring cylinder 301 and the stirring cylinder in the second stirring assembly 4 gradually decrease from top to bottom. This enables the slurry to form a high-speed turbulent flow during the downward movement from top to bottom due to the gradually decreasing internal area, in cooperation with the stirring of the first stirring mechanism 302 and the stirring mechanism in the second stirring assembly 4, achieving full stirring and mixing of the slurry.

[0095] In this embodiment, the second CO₂ inlet 102 can continuously input CO₂ gas into the stirring cylinder in the second stirring assembly 4, so that the slurry in the stirring cylinder in the second stirring assembly 4 can continuously react with the CO₂ gas while being stirred and mixed.

[0096] In this embodiment, the feeding port 104 is used to add reaction additives.

[0097] In this embodiment, the jet mixing and feeding unit 2 can perform preliminary multiple mixing on the aqueous solution, coal-based solid powder, and CO₂ gas before they enter the material cylinder 1, achieving initial uniform mixing of the slurry, and injecting the initially uniformly mixed slurry into the interior of the material cylinder 1 for further mixing and reaction, so that the reaction raw materials are fully mixed and uniform.

[0098] As a preferred solution of this embodiment, as Figure 1 shown, the shape of the first stirring cylinder 301 is an inverted frustum of a cone, and the interior of the first stirring cylinder 301 is hollow and open at both ends.

[0099] As Figure 1 shown, the first stirring cylinder 301 is located below the feeding port 101.

[0100] As Figure 3As shown in the figure, the first stirring mechanism 302 includes a first rotating shaft 30201, which is coaxially arranged with the material cylinder 1. The first rotating shaft 30201 can be driven by a first stirring motor 30202 arranged at the top of the first rotating shaft 30201. The side wall of the first stirring motor 30202 is fixedly connected to one end of a plurality of first stirring motor connecting rods 30206 in the circumferential direction, and the other end of each first stirring motor connecting rod 30206 is fixedly connected to the inner side wall of the material cylinder 1.

[0101] As Figure 3 shown in the figure, a plurality of stirring shafts 30203 are evenly arranged along the circumferential direction on the first rotating shaft 30201. Each stirring shaft 30203 is arranged along the radial direction of the first rotating shaft 30201. One end of each stirring shaft 30203 is fixedly connected to the first rotating shaft 30201, and a stirring scraper 30204 is arranged at the other end of each stirring shaft 30203. Each stirring scraper 30204 is in sliding contact with the inner side wall of the first stirring cylinder 301 respectively.

[0102] As Figure 3 shown in the figure, a plurality of stirring blades 30205 are also evenly arranged along the circumferential direction at the bottom of the first rotating shaft 30201.

[0103] In this embodiment, the stirring scraper 30204 is a stirring scraper with an arc-shaped structure; moreover, the radian of the stirring scraper 30204 matches the inner wall radian of the first stirring cylinder 301; through such a design, when the stirring shaft 30203 fully stirs and mixes the slurry in the first stirring cylinder 301, the stirring scraper 30204 can be used to scrape the slurry adhering to the inner wall of the first stirring cylinder 301; such a design can not only avoid the slurry from sticking to the wall, but also enable the slurry in the first stirring cylinder 301 to be fully stirred and mixed.

[0104] In this embodiment, the stirring blades 30205 can stir up the slurry attached to the lower part of the first stirring cylinder 301, avoid the accumulation of the slurry at the lower part of the first stirring cylinder 301, and ensure the full mixing of the whole slurry.

[0105] As a preferred solution of this embodiment, as Figure 4 and Figure 5 shown in the figure, the first rotary opening and closing assembly 303 includes a mounting disk 30301 arranged in the horizontal direction. The mounting disk 30301 is coaxially arranged at the bottom of the first stirring cylinder 301, and the outer side wall of the mounting disk 30301 is fixedly connected to the inner side wall of the material cylinder 1.

[0106] As Figure 5As shown, a plurality of lower sliding through grooves 3030101 are also evenly arranged along the circumferential direction on the mounting disk 30301. One end of each lower sliding through groove 3030101 is close to the center of the mounting disk 30301, and the other end of each lower sliding through groove 3030101 is far from the center of the mounting disk 30301. A mounting disk discharge port 3030102 is also provided at the center of the mounting disk 30301.

[0107] As Figure 6 and Figure 7 shown, a closing assembly 30302 is also coaxially arranged on the mounting disk 30301. The closing assembly 30302 is slidably connected to the lower sliding through grooves 3030101 on the mounting disk 30301.

[0108] As Figure 9 shown, a mounting ring 30303 is also coaxially arranged on the closing assembly 30302. An integrated first gear track 30304 is also arranged along the circumferential direction on the inner side surface of the mounting ring 30303. A linkage assembly 30305 is also coaxially arranged inside the mounting ring 30303. The linkage assembly 30305 is fixedly connected to the first gear track 30304. The linkage assembly 30305 is also slidably connected to the closing assembly 30302. The top of the linkage assembly 30305 contacts the bottom of the first mixing drum 301.

[0109] As Figure 10 shown, a second motor 30306 is arranged on the outer side surface of the bottom of the first mixing drum 301. The output shaft of the second motor 30306 is connected to a horizontally arranged first gear 30307. The output shaft of the second motor 30306 can drive the first gear 30307. The first gear 30307 also meshes with the first gear track 30304.

[0110] As a preferred solution of this embodiment, as Figure 9 shown, the linkage assembly 30305 includes a connecting ring 3030501. The connecting ring 3030501 is coaxially arranged with the mounting ring 30303. A plurality of pull rods 3030502 are evenly arranged along the circumferential direction on the connecting ring 3030501. One end of each pull rod 3030502 is fixedly connected to the outer side surface of the connecting ring 3030501, and the other end of each pull rod 3030502 is fixedly connected to the bottom of the first gear track 30304.

[0111] As Figure 9 shown, an upper sliding through groove 3030503 is also provided at one end of each pull rod 3030502 close to the first gear track 30304. Each upper sliding through groove 3030503 corresponds to each lower sliding through groove 3030101 one by one.

[0112] In this embodiment, the other end of each pull rod 3030502 is fixedly connected to the bottom of the first gear track 30304. Therefore, the connection of the pull rod 3030502 will not affect the meshing of the first gear 30307 and the first gear track 30304.

[0113] As a preferred solution of this embodiment, as Figure 8 shown, the closing assembly 30302 includes a plurality of plugging plates 3030201 that are petal-shaped and horizontally arranged. The plurality of plugging plates 3030201 are arranged circumferentially, and every two adjacent plugging plates 3030201 are in contact. The top of each plugging plate 3030201 is in contact with the bottom of the connecting ring 3030501, and the bottom of each plugging plate 3030201 is in contact with the top of the mounting disc 30301.

[0114] As Figure 8 shown, a sliding post 3030202 is respectively arranged on the top of each plugging plate 3030201. The plurality of sliding posts 3030202 correspond to a plurality of upper sliding through grooves 3030503 one by one, and each sliding post 3030202 is slidably connected to each upper sliding through groove 3030503.

[0115] As Figure 8 shown, a lower sliding post 3030203 is respectively arranged on the bottom of each plugging plate 3030201. The plurality of lower sliding posts 3030203 correspond to a plurality of lower sliding through grooves 3030101 one by one, and each lower sliding post 3030203 is slidably connected to each lower sliding through groove 3030101.

[0116] In this embodiment, the plugging plate 3030201 ensures that the slurry in the first mixing cylinder 301 in the upper layer will enter the mixing cylinder of the lower second mixing assembly 4 only after being uniformly mixed, realizing the full mixing of the slurry.

[0117] In this embodiment, the slurry uniformly mixed in the mixing cylinder of the second mixing assembly 4 enters the discharge port 105 through the gap between the connecting ring 3030501 and the plurality of plugging plates 3030201 and the discharge port 3030102 of the mounting disc.

[0118] As a preferred solution of this embodiment, as Figure 2 shown, the second mixing assembly 4 includes a second rotating shaft 401. The second rotating shaft 401 and the material cylinder 1 are coaxially arranged. The second rotating shaft 401 can be driven by a second mixing motor 402 arranged at the top of the second rotating shaft 401. One end of the side wall of the second mixing motor 402 is fixedly connected to the ends of a plurality of second mixing motor connecting rods 403 circumferentially, and the other end of each second mixing motor connecting rod 403 is fixedly connected to the bottom of the first rotary opening and closing assembly 303.

[0119] As Figure 2 shown, the second stirring assembly 4 further includes a second rotary opening and closing assembly 404, and the structure of the second rotary opening and closing assembly 404 is the same as that of the first rotary opening and closing assembly 303.

[0120] In this embodiment, the other end of each second stirring motor connecting rod 403 is fixedly connected to the bottom of the mounting plate 30301 in the first stirring assembly 3.

[0121] As a preferred solution of this embodiment, as Figure 11 shown, the jet mixing feeding unit 2 includes a first connecting cylinder 201 communicated with the feeding port 101. One end of the first connecting cylinder 201 is fixedly connected to the outer side wall of the material cylinder 1. The other end of the first connecting cylinder 201 is rotatably connected and communicated with one end of the first rotating cylinder 202. The other end of the first rotating cylinder 202 is rotatably connected and communicated with one end of the second connecting cylinder 203. The other end of the second connecting cylinder 203 is rotatably connected and communicated with one end of the second rotating cylinder 204. The other end of the second rotating cylinder 204 is rotatably connected and communicated with one end of the feeding cylinder 205. The other end of the feeding cylinder 205 is closed. A coal-based solid powder inlet 20501 is provided on the other end of the feeding cylinder 205. A first CO2 inlet 20502 is further provided on the other end of the feeding cylinder 205. An aqueous solution inlet 20503 is provided on the top side wall of the feeding cylinder 205.

[0122] As Figure 12 shown, a first circulation port 106 is further provided on the material cylinder 1. A stirring cylinder circulation port 304 is further provided on the first stirring cylinder 301. A second circulation port 206 is provided on the bottom side wall of the second connecting cylinder 203. The position where the second circulation port 206 is located on the second connecting cylinder 203 is fixedly connected to one end of the circulation pipe 207. One end of the circulation pipe 207 is communicated with the first circulation port 106 and the stirring cylinder circulation port 304. The other end of the circulation pipe 207 is fixedly connected to the position where the first circulation port 106 is located on the material cylinder 1.

[0123] In this embodiment, the adjacent structures between the material cylinder 1, the first connecting cylinder 201, the first rotating cylinder 202, the second connecting cylinder 203, the second rotating cylinder 204 and the feeding cylinder 205 are sealed and internally communicated.

[0124] In this embodiment, the setting of the circulation pipe 207 can, when the slurry in the first stirring cylinder 301 is excessive, re-enter the excess slurry into the second connecting cylinder 203 through the circulation pipe 207, and further mix it through the rotary crushing assembly 214, and then input it into the first stirring cylinder 301; this can not only further mix the slurry evenly, but also ensure continuous production and realize continuous production.

[0125] In this embodiment, the coal-based solid powder inlet 20501 is connected to a known existing external supplier; the first CO2 inlet 20502 is connected to a known existing external supplier; the aqueous solution inlet 20503 is connected to a known existing external supplier; while being connected, it can limit the axial direction of the feed cylinder 205, so that when the first rotating cylinder 202 and the second rotating cylinder 204 rotate synchronously, the positions of the first rotating cylinder 202 and the second rotating cylinder 204 can remain unchanged.

[0126] In this embodiment, the second connecting cylinder 203 is fixedly connected to the material cylinder 1 through a circulation pipe 207, which can limit the axial directions of the second connecting cylinder 203 and the first rotating cylinder 202.

[0127] As a preferred solution of this embodiment, as Figure 12 shown, a first spiral input rod 208 is also coaxially arranged and fixedly connected inside the second rotating cylinder 204.

[0128] As Figure 11 shown, a double-headed motor 209 is also arranged on the outer side wall of the second connecting cylinder 203. A second gear 210 is arranged on one output shaft of the double-headed motor 209, and a third gear 211 is arranged on the other output shaft of the double-headed motor 209; a second gear track 212 is coaxially sleeved on the outer side wall of the first rotating cylinder 202, and the second gear track 212 can be meshed with the second gear 210; a third gear track 213 is coaxially sleeved and fixedly connected on the outer side wall of the second rotating cylinder 204, and the third gear track 213 can be meshed with the third gear 211.

[0129] As Figure 12 shown, a plurality of groups of parallel rotating crushing components 214 are arranged on the inner side wall of the first rotating cylinder 202, and each group of rotating crushing components 214 is evenly arranged along the circumferential direction of the first rotating cylinder 202.

[0130] As a preferred solution of this embodiment, as Figure 13 shown, the rotating crushing component 214 includes an arc-shaped fixing plate 21401, the arc-shaped fixing plate 21401 is perpendicular and fixedly connected to the inner side wall of the first rotating cylinder 202, one end of the side wall of the arc-shaped fixing plate 21401 is rotatably connected to one end of a stirring blade connecting shaft 21402, the stirring blade connecting shaft 21402 is also coaxially sleeved and fixedly connected with a fourth gear 21403, the other end of the stirring blade connecting shaft 21402 is also coaxially sleeved and fixedly connected with a mounting head 21404, a plurality of rotating fan blades 21405 are evenly arranged along the circumferential direction on the outer side wall of the mounting head 21404, one end of each rotating fan blade 21405 is fixedly connected to the mounting head 21404, and a stirring blade 21406 is also arranged at the other end of each rotating fan blade 21405.

[0131] As shown Figure 12 in FIG. 2, a gear protection plate 216 is also coaxially sleeved on the inner side wall of the second gear track 212. The outer side wall of the gear protection plate 216 is fixedly connected to the inner side wall of the second gear track 212, and the inner side wall of the gear protection plate 216 is fixedly connected to the outer side wall of the first rotating cylinder 202. A fourth gear track 217 is also circumferentially arranged on the inner side wall of the gear protection plate 216, and multiple fourth gear tracks 217 correspond to multiple groups of rotary crushing assemblies 214 one by one.

[0132] As shown Figure 12 in FIG. 3, multiple groups of fifth gears 218 are also arranged on the outer side wall of the first rotating cylinder 202. Each group of fifth gears 218 is uniformly arranged along the circumference of the first rotating cylinder 202, and multiple fifth gears 218 correspond to multiple rotary crushing assemblies 214 one by one; the outer side wall of the first rotating cylinder 202 is also fixedly connected to multiple third motors 219 arranged in parallel. The output end of each third motor 219 can drive one in each group of fifth gears 218, and each group of fifth gears 218 meshes with each fourth gear track 217.

[0133] As shown Figure 13 in FIG. 4, a belt through hole 220 is also opened in the first rotating cylinder 202 at each fifth gear 218. A belt 221 penetrates through each belt through hole 220, and each fifth gear 218 can drive the fourth gear 21403 to rotate through the belt 221.

[0134] In this embodiment, when the second rotating cylinder 204 rotates, a spiral channel can be formed between multiple arc-shaped fixing plates 21401, so that the slurry can generate a vortex, which not only ensures that the slurry can be mixed as evenly as possible, but also enables the slurry to generate a relatively large rotational centrifugal force, so as to ensure that it can be sprayed into the material cylinder 1.

[0135] In this embodiment, multiple rotary crushing assemblies 214 can form a vortex stirring, perform further rotary stirring and mixing, and spray the mixed slurry into the material cylinder 1 for the next mixing and stirring process.

[0136] As a preferred solution of this embodiment, as shown Figure 14 in FIG. 5, the discharging unit 5 includes a first discharging pipe 501. The first discharging pipe 501 is communicated with the discharging port 105, and the first discharging pipe 501 is fixedly connected to the outer side wall of the material cylinder 1. A fourth motor 502 is also fixedly connected to the outer side wall of the first discharging pipe 501. A discharging port main gear 503 is arranged on the output shaft of the fourth motor 502, and the fourth motor 502 can drive the discharging port main gear 503;

[0137] As shown Figure 14 and Figure 15As shown, a second discharge pipe 508 is also coaxially arranged at the bottom of the first discharge pipe 501. A fixing ring 504 is coaxially installed between the first discharge pipe 501 and the second discharge pipe 508. The inner diameter of the fixing ring 504 is smaller than the outer diameters of the first discharge pipe 501 and the second discharge pipe 508, so that the first discharge pipe 501 and the second discharge pipe 508 axially limit the fixing ring 504.

[0138] As Figure 14 shown, a sixth gear 505 is also integrally and coaxially arranged on the outer side wall of the fixing ring 504. The sixth gear 505 is meshed and driven by the main discharge port gear 503, so that the fixing ring 504 can circumferentially rotate with the central axis of the first discharge pipe 501 as the rotation axis.

[0139] The thickness of the sixth gear 505 is greater than the thickness of the fixing ring 504. The upper inner ring of the sixth gear 505 is sleeved on the bottom of the first discharge pipe 501, and the lower inner ring of the sixth gear 505 is sleeved on the top of the second discharge pipe 508 to realize the radial limit of the fixing ring 504.

[0140] As Figure 15 shown, a second spiral input rod 506 is also coaxially arranged inside the first discharge pipe 501. A plurality of spiral fixing rods 507 are circumferentially arranged on the outer side wall of the bottom of the central axis of the second spiral input rod 506. One end of each spiral fixing rod 507 is fixedly connected to the outer side wall of the bottom of the central axis of the second spiral input rod 506, and the other end of each spiral fixing rod 507 is fixedly connected to the inner side wall of the fixing ring 504.

[0141] In this embodiment, a storage barrel is also externally connected to the outlet of the second discharge pipe 508. The storage barrel adopts an existing storage barrel, and the storage barrel can limit the second discharge pipe 508.

[0142] In this embodiment, the discharging unit 5 can ensure uniform discharging of the slurry.

[0143] In this embodiment, three support legs 6 of the material barrel are also arranged at the bottom of the material barrel 1. The support legs 6 of the material barrel can stably support the material barrel 1 and can also facilitate the movement of the entire device through the support legs 6 of the material barrel.

[0144] When the device in this embodiment is in use, it specifically includes the following steps:

[0145] Step 1: When the aqueous solution enters through the aqueous solution inlet 20503, the coal-based solid powder enters through the coal-based solid powder inlet 20501, and the CO2 gas enters into the feeding cylinder 205 through the CO2 first inlet 20502 and the CO2 second inlet 102, start the double-headed motor 209 to drive the second gear 210 and the third gear 211 to rotate synchronously. The second gear 210 drives the second gear track 212 to rotate synchronously, and the third gear 211 drives the third gear track 213 to rotate synchronously. Furthermore, the second gear track 212 drives the first rotating cylinder 202 to rotate synchronously, and the third gear track 213 drives the second rotating cylinder 204 to rotate synchronously, so that the mixed slurry in the feeding cylinder 205 enters the second connecting cylinder 203 through the first spiral input rod 208 and in an overall rotating state, and then enters the rotating first rotating cylinder 202. Along with the synchronous rotation of the first rotating cylinder 202, preliminary uniform mixing is achieved.

[0146] Step 2: When the mixed slurry enters the first rotating cylinder 202, multiple third motors 219 are started to drive the respective connected fifth gears 218 to rotate. Under the action of the connected belt 221, drive the connected fourth gear 21403, rotating fan blade 21405 and stirring blade 21406 to rotate synchronously; at the same time, under the action of the meshing force, the fifth gear 218 drives the fourth gear track 217 to rotate, and then drives the other meshing fifth gears 218 on the fourth gear track 217 to rotate; furthermore, under the action of the respective connected belts 221, drive the connected fourth gear 21403, rotating fan blade 21405 and stirring blade 21406 to rotate synchronously. Multiple rotating fan blades 21405 rotate synchronously to further stir and mix the rotating slurry in the first rotating cylinder 202, and use the stirring blade 21406 to rotate and crush the small pieces of coal-based solid powder in the slurry to achieve more uniform mixing of the slurry, and then the mixed slurry is sprayed into the material cylinder 1.

[0147] Step 3: After the mixed slurry is sprayed into the material cylinder 1 and the first stirring cylinder 301, the first stirring motor 30202 is started to drive the first rotating shaft 30201, stirring fan blade 30205, stirring shaft 30203 and stirring scraper 30204 to rotate synchronously. Use the stirring shaft 30203 to stir the slurry in the first stirring cylinder 301, and at the same time use the stirring scraper 30204 and the stirring fan blade 30205 to scrape the slurry on the inner wall and bottom of the first stirring cylinder 301 respectively, achieving sufficient mixing of the slurry.

[0148] Step 4: When the slurry in the first mixing drum 301 is evenly mixed, start the second motor 30306. The second motor 30306 drives the first gear 30307 to rotate, thereby driving the first gear track 30304 and the mounting ring 30303 to rotate synchronously, so that a plurality of pull rods 3030502 and the upper sliding through groove 3030503 rotate synchronously; at this time, the upper sliding column 3030202 slides in the upper sliding through groove 3030503 in the direction close to the first gear track 30304, driving a plurality of sealing plates 3030201 to move synchronously in the direction close to the first gear track 30304. At the same time, the lower sliding column 3030203 slides in the lower sliding through groove 3030101 in the direction close to the first gear track 30304. At this time, a gap appears between a plurality of sealing plates 3030201, and the first mixing drum 301 communicates with the mixing drum in the second mixing assembly 4. Then, turn off the second motor 30306, and the evenly mixed slurry in the first mixing drum 301 enters the mixing drum in the second mixing assembly 4 through the connecting ring 3030501, the gap between a plurality of sealing plates 3030201, and the mounting plate discharge port 3030102.

[0149] Step 5: The second mixing assembly 4 performs the same operation as the second mixing assembly 4. After the slurry is further mixed, the slurry enters the first discharge pipe 501 of the discharge unit 5 from the mixing drum in the second mixing assembly 4 through the mounting plate discharge port and the discharge port 105 in the second rotary opening and closing assembly 404.

[0150] Step 6: Start the fourth motor 502 to drive the discharge port main gear 503 to rotate. Under the action of the meshing force, drive the sixth gear 505 to rotate synchronously, and then drive the fixed ring 504 and the second spiral input rod 506 to rotate synchronously, so that the slurry can be transported downward in a rotating manner under the action of the spiral force and discharged from the bottom of the second discharge pipe 508 to achieve uniform discharge.

Claims

1. A coal-based solid waste negative carbon underground filling device, including a material cylinder (1), characterized in that, On the top side wall of the described material cylinder (1), a feed inlet (101) penetrating the side wall is provided, and a jet mixing feed unit (2) is arranged outside the feed inlet (101); Inside the described material cylinder (1), a first stirring assembly (3) and a second stirring assembly (4) are successively arranged from top to bottom, and the top of the second stirring assembly (4) is fixedly connected to the bottom of the first stirring assembly (3); The described first stirring assembly (3) includes a first stirring cylinder (301). The first stirring cylinder (301) and the material cylinder (1) are coaxially arranged. The outer side wall of the top of the first stirring cylinder (301) is fixedly connected to the inner side wall of the material cylinder (1). A first stirring mechanism (302) is arranged inside the first stirring cylinder (301). A first rotary opening and closing assembly (303) is arranged at the bottom of the first stirring cylinder (301), and the first rotary opening and closing assembly (303) is fixedly connected to the inner side wall of the material cylinder (1); The structure of the described second stirring assembly (4) is the same as that of the first stirring assembly (3); A second CO₂ inlet (102) is also provided on the side wall of the described material cylinder (1), and the second CO₂ inlet (102) is arranged between the first stirring assembly (3) and the second stirring assembly (4); A flue gas discharge port (103) is also provided at the top of the described material cylinder (1). A feeding port (104) is also provided at the top of the material cylinder (1). A discharge port (105) is also provided at the bottom of the material cylinder (1), and a discharge unit (5) is arranged outside the discharge port (105).

2. The coal-based solid waste negative carbon underground filling device according to claim 1, wherein The shape of the described first stirring cylinder (301) is an inverted frustum shape, and the inside of the first stirring cylinder (301) is hollow and both ends are open; The described first stirring cylinder (301) is located below the feed inlet (101); The described first stirring mechanism (302) includes a first rotating shaft (30201). The first rotating shaft (30201) and the material cylinder (1) are coaxially arranged. The first rotating shaft (30201) can be driven by a first stirring motor (30202) arranged at the top of the first rotating shaft (30201). The side wall of the first stirring motor (30202) is fixedly connected to one end of a plurality of first stirring motor connecting rods (30206) along the circumferential direction, and the other end of each first stirring motor connecting rod (30206) is fixedly connected to the inner side wall of the material cylinder (1); A plurality of stirring shafts (30203) are evenly arranged along the circumferential direction on the described first rotating shaft (30201). Each stirring shaft (30203) is arranged along the radial direction of the first rotating shaft (30201). One end of each stirring shaft (30203) is fixedly connected to the first rotating shaft (30201), and a stirring scraper (30204) is arranged at the other end of each stirring shaft (30203). Each stirring scraper (30204) is in sliding contact with the inner side wall of the first stirring cylinder (301); A plurality of stirring blades (30205) are also evenly arranged along the circumferential direction at the bottom of the described first rotating shaft (30201).

3. The coal-based solid waste negative-carbon underground filling device according to claim 1, characterized in that, The described first rotary opening and closing assembly (303) includes a mounting disc (30301) arranged in the horizontal direction. The mounting disc (30301) is coaxially arranged at the bottom of the first mixing drum (301), and the outer side wall of the mounting disc (30301) is fixedly connected to the inner side wall of the material cylinder (1); On the described mounting disc (30301), a plurality of lower sliding through grooves (3030101) are also evenly distributed along the circumferential direction. One end of each lower sliding through groove (3030101) is close to the center of the mounting disc (30301), and the other end of each lower sliding through groove (3030101) is far from the center of the mounting disc (30301). A mounting disc discharge port (3030102) is also opened at the center of the mounting disc (30301); A closing assembly (30302) is also coaxially arranged on the mounting disc (30301), and the closing assembly (30302) is slidably connected to the lower sliding through grooves (3030101) on the mounting disc (30301); A mounting ring (30303) is also coaxially arranged on the closing assembly (30302). An integrated first gear track (30304) is also distributed along the circumferential direction on the inner side surface of the mounting ring (30303). A linkage assembly (30305) is also coaxially arranged inside the mounting ring (30303). The linkage assembly (30305) is fixedly connected to the first gear track (30304), the linkage assembly (30305) is also slidably connected to the closing assembly (30302), and the top of the linkage assembly (30305) contacts the bottom of the first mixing drum (301); A second motor (30306) is arranged on the outer side surface of the bottom of the first mixing drum (301). The output shaft of the second motor (30306) is connected to a horizontally arranged first gear (30307). The output shaft of the second motor (30306) can drive the first gear (30307), and the first gear (30307) is also meshed with the first gear track (30304).

4. The coal-based solid waste negative carbon underground filling device according to claim 3, wherein, The described linkage assembly (30305) includes a connecting ring (3030501). The connecting ring (3030501) is coaxially arranged with the mounting ring (30303). A plurality of pull rods (3030502) are evenly distributed along the circumferential direction on the connecting ring (3030501). One end of each pull rod (3030502) is fixedly connected to the outer side surface of the connecting ring (3030501), and the other end of each pull rod (3030502) is fixedly connected to the bottom of the first gear track (30304); One end of each pull rod (3030502) close to the first gear track (30304) is also provided with an upper sliding through groove (3030503), and each upper sliding through groove (3030503) corresponds to each lower sliding through groove (3030101) one by one.

5. The coal-based solid waste negative carbon underground filling device according to claim 4, wherein, The described closing assembly (30302) includes a plurality of plugging plates (3030201) in the shape of petals and arranged horizontally. The plurality of plugging plates (3030201) are arranged circumferentially, and every two adjacent plugging plates (3030201) are in contact. The top of each plugging plate (3030201) is in contact with the bottom of the connecting ring (3030501), and the bottom of each plugging plate (3030201) is in contact with the top of the mounting plate (30301). A sliding column (3030202) is respectively arranged on the top of each plugging plate (3030201). The plurality of sliding columns (3030202) correspond to a plurality of upper sliding through grooves (3030503) one by one. Each sliding column (3030202) is slidably connected to each upper sliding through groove (3030503). A lower sliding column (3030203) is respectively arranged on the bottom of each plugging plate (3030201). The plurality of lower sliding columns (3030203) correspond to a plurality of lower sliding through grooves (3030101) one by one. Each lower sliding column (3030203) is slidably connected to each lower sliding through groove (3030101).

6. The coal-based solid waste negative carbon underground filling device according to claim 1, characterized in that, The described second stirring assembly (4) includes a second rotating shaft (401). The second rotating shaft (401) is coaxially arranged with the material cylinder (1). The second rotating shaft (401) can be driven by a second stirring motor (402) arranged at the top of the second rotating shaft (401). The side wall of the second stirring motor (402) is fixedly connected to one end of a plurality of second stirring motor connecting rods (403) along the circumference. The other end of each second stirring motor connecting rod (403) is fixedly connected to the bottom of the first rotary opening and closing assembly (303). The second stirring assembly (4) further includes a second rotary opening and closing assembly (404). The structure of the second rotary opening and closing assembly (404) is the same as that of the first rotary opening and closing assembly (303).

7. The coal-based solid waste negative-carbon underground filling device according to claim 1, characterized in that, The described jet mixing and feeding unit (2) includes a first connecting cylinder (201) communicated with the feeding port (101). One end of the first connecting cylinder (201) is fixedly connected to the outer side wall of the material cylinder (1). The other end of the first connecting cylinder (201) is rotatably connected and communicated with one end of a first rotating cylinder (202). The other end of the first rotating cylinder (202) is rotatably connected and communicated with one end of a second connecting cylinder (203). The other end of the second connecting cylinder (203) is rotatably connected and communicated with one end of a second rotating cylinder (204). The other end of the second rotating cylinder (204) is rotatably connected and communicated with one end of a feeding cylinder (205). The other end of the feeding cylinder (205) is closed. A coal-based solid powder inlet (20501) is opened on the other end of the feeding cylinder (205). A first CO2 inlet (20502) is also opened on the other end of the feeding cylinder (205). An aqueous solution inlet (20503) is opened on the top side wall of the feeding cylinder (205). A first circulation port (106) is further formed on the material cylinder (1), a mixing cylinder circulation port (304) is further formed on the first mixing cylinder (301), a second circulation port (206) is further formed on the bottom side wall of the second connecting cylinder (203), one end of the circulation pipe (207) is fixedly connected to the position where the second circulation port (206) is located on the second connecting cylinder (203), one end of the circulation pipe (207) is communicated with the mixing cylinder circulation port (304) through the first circulation port (106), and the other end of the circulation pipe (207) is fixedly connected to the position where the first circulation port (106) is located on the material cylinder (1).

8. The coal-based solid waste negative carbon underground filling device according to claim 7, wherein, A first spiral input rod (208) is coaxially arranged and fixedly connected inside the second rotating cylinder (204). A double-headed motor (209) is further arranged on the outer side wall of the second connecting cylinder (203). A second gear (210) is arranged on one output shaft of the double-headed motor (209), and a third gear (211) is arranged on the other output shaft of the double-headed motor (209). A second gear track (212) is coaxially sleeved on the outer side wall of the first rotating cylinder (202), and the second gear track (212) can be meshed with the second gear (210). A third gear track (213) is coaxially sleeved and fixedly connected on the outer side wall of the second rotating cylinder (204), and the third gear track (213) can be meshed with the third gear (211). A plurality of groups of parallel rotating crushing components (214) are arranged on the inner side wall of the first rotating cylinder (202), and each group of rotating crushing components (214) is evenly arranged along the circumferential direction of the first rotating cylinder (202).

9. The coal-based solid waste negative carbon underground filling device according to claim 8, characterized in that, The rotating crushing component (214) includes an arc-shaped fixing plate (21401). The arc-shaped fixing plate (21401) is perpendicular to and fixedly connected to the inner side wall of the first rotating cylinder (202). One end of a mixing blade connecting shaft (21402) is rotatably connected to the side wall of the arc-shaped fixing plate (21401). The mixing blade connecting shaft (21402) is coaxially sleeved and fixedly connected with a fourth gear (21403). The other end of the mixing blade connecting shaft (21402) is coaxially sleeved and fixedly connected with a mounting head (21404). A plurality of rotating fan blades (21405) are evenly arranged along the circumferential direction on the outer side wall of the mounting head (21404). One end of each rotating fan blade (21405) is fixedly connected to the mounting head (21404), and a mixing blade (21406) is further arranged at the other end of each rotating fan blade (21405). A gear protection plate (216) is coaxially sleeved on the inner side wall of the second gear track (212). The outer side wall of the gear protection plate (216) is fixedly connected to the inner side wall of the second gear track (212), the inner side wall of the gear protection plate (216) is fixedly connected to the outer side wall of the first rotating cylinder (202), and a fourth gear track (217) is further arranged along the circumferential direction on the inner side wall of the gear protection plate (216). The plurality of fourth gear tracks (217) correspond to the plurality of groups of rotating crushing components (214) one by one. On the outer side wall of the described first rotating cylinder (202), a plurality of groups of fifth gears (218) are further provided. Each group of fifth gears (218) is evenly arranged along the circumferential direction of the first rotating cylinder (202), and the multiple fifth gears (218) correspond to the multiple rotary crushing components (214) one by one; the outer side wall of the first rotating cylinder (202) is also fixedly connected to a plurality of third motors (219) arranged in parallel. The output end of each third motor (219) can drive one in each group of fifth gears (218), and each group of fifth gears (218) meshes with each fourth gear track (217); At each fifth gear (218), the first rotating cylinder (202) is also provided with a belt through hole (220). A belt (221) penetrates through each belt through hole (220), and each fifth gear (218) can drive the fourth gear (21403) to rotate through the belt (221).

10. The coal-based solid waste negative-carbon underground filling device according to claim 1, wherein, The discharge unit (5) includes a first discharge pipe (501). The first discharge pipe (501) is communicated with the discharge port (105). The first discharge pipe (501) is fixedly connected to the outer side wall of the material cylinder (1). The outer side wall of the first discharge pipe (501) is also fixedly connected to a fourth motor (502). An outlet main gear (503) is arranged on the output shaft of the fourth motor (502), and the fourth motor (502) can drive the outlet main gear (503); At the bottom of the first discharge pipe (501), a second discharge pipe (508) is coaxially arranged. A fixing ring (504) is coaxially installed between the first discharge pipe (501) and the second discharge pipe (508). The inner diameter of the fixing ring (504) is smaller than the outer diameters of the first discharge pipe (501) and the second discharge pipe (508), so that the first discharge pipe (501) and the second discharge pipe (508) axially limit the fixing ring (504); On the outer side wall of the fixing ring (504), a sixth gear (505) is integrally and coaxially arranged. The sixth gear (505) is driven by meshing with the outlet main gear (503); so that the fixing ring (504) can rotate circumferentially with the central axis of the first discharge pipe (501) as the rotation axis; The thickness of the sixth gear (505) is greater than the thickness of the fixing ring (504). The upper inner ring of the sixth gear (505) is sleeved on the bottom of the first discharge pipe (501), and the lower inner ring of the sixth gear (505) is sleeved on the top of the second discharge pipe (508) to realize the radial limit of the fixing ring (504); Inside the first discharge pipe (501), a second spiral input rod (506) is coaxially arranged. A plurality of spiral fixing rods (507) are arranged along the circumferential direction on the outer side wall of the bottom of the central axis of the second spiral input rod (506). One end of each spiral fixing rod (507) is fixedly connected to the outer side wall of the bottom of the central axis of the second spiral input rod (506), and the other end of each spiral fixing rod (507) is fixedly connected to the inner side wall of the fixing ring (504).

Images