Coal-based solid waste continuous mineralization co2 integrated device and process

Abstract

The application provides a coal-based solid waste continuous mineralization CO2 integrated device, which comprises a tank body, a slurry main inlet and a catalyst adding port are arranged on the top plate of the tank body, a discharge port is arranged at the bottom of the tank body, a partition plate is arranged in the tank body, the inner cavity of the tank body is divided into a stirring cavity and a discharge cavity by the partition plate, the stirring cavity is communicated with the slurry main inlet and the catalyst adding port, and the discharge cavity is communicated with the discharge port; a stirring shaft is vertically arranged in the stirring cavity, an aeration pipeline is arranged in the discharge cavity, the stirring shaft extends into the aeration pipeline through the partition plate, and a first flow passage communicated with the aeration pipeline is arranged in the stirring shaft; a plurality of stirring and aeration assemblies are arranged on the stirring shaft in the axial direction, a plurality of second flow passages are arranged on each stirring and aeration assembly, and the first flow passage is communicated with the stirring cavity through the second flow passage. The stirring and mixing effect of CO2 gas and solid-liquid mixed slurry is greatly improved, CO2 gas can be mixed with the slurry more quickly and uniformly, and the carbon negative efficiency and effect are improved.

Description

Technical Field

[0001] This invention belongs to the field of coal-based solid waste mineralization CO2 technology, specifically relating to an integrated device and process for continuous coal-based solid waste mineralization CO2. Background Technology

[0002] Coal gangue, a solid waste generated by coal mining, is typically dumped and piled on the ground, accounting for 10% to 20% of coal production. This disposal method not only occupies a large amount of scarce land resources but also poses a series of safety hazards, such as spontaneous combustion of gangue piles. Faced with the pressure of ecological and environmental protection, how to efficiently dispose of solid waste such as coal gangue is one of the challenges facing coal enterprises in achieving high-quality development. CO2 sequestration refers to the process of injecting captured CO2 into deep geological reservoirs through engineering techniques to achieve long-term isolation of CO2 from the atmosphere. The main methods include geological sequestration, surface sequestration, and marine sequestration. Currently, the technology of mineralizing and adsorbing carbon dioxide using coal-based solid waste materials has broad development prospects, as it can effectively treat solid waste while adsorbing carbon dioxide. However, the existing CO2 mineralization devices have the following main drawbacks: 1) Simple stirring leads to insufficient distribution and mixing of gas, liquid, and solid components, resulting in low gas absorption efficiency and requiring longer stirring times; 2) When CO2 is introduced, a relatively high gas pressure is required for a full reaction, and the outlet is easily blocked by the slurry. Gas diffusion is greatly affected by the slurry state, resulting in uneven distribution and insufficient mixing and absorption; 3) Slurry tends to accumulate on the sidewalls of the device, and prolonged accumulation can cause solidification and the formation of large particles, affecting slurry preparation and flowability. These drawbacks ultimately result in limited solid waste consumption and unsatisfactory CO2 mineralization effects, necessitating improvement. Summary of the Invention

[0003] In view of the defects and deficiencies of the existing technology, the purpose of this invention is to provide an integrated device and process for continuous mineralization of coal-based solid waste with CO2, so as to solve the technical problems of poor mineralization effect caused by the inability of CO2 gas to be fully mixed and absorbed by the slurry and the easy retention and accumulation of the slurry in the mineralization process.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An integrated continuous mineralization CO2 device for coal-based solid waste includes a tank. The top plate of the tank has a main slurry inlet and a catalyst addition port, and the bottom plate of the tank has a discharge port. A partition is provided inside the tank, which divides the inner cavity of the tank into a stirring chamber and a discharge chamber. The stirring chamber is connected to the main slurry inlet and the catalyst addition port, and the discharge chamber is connected to the discharge port. A stirring shaft is vertically arranged inside the stirring chamber, and an air-filling pipe is provided inside the discharge chamber. The stirring shaft extends through the partition and into the air-filling pipe. A first flow passage communicating with the air-filling pipe is provided inside the stirring shaft. Multiple agitation and ventilation components are arranged axially on the stirring shaft, and each agitation and ventilation component is provided with multiple second flow channels. The first flow channel is connected to the stirring chamber through the second flow channels.

[0006] The present invention also has the following technical features: Specifically, a transition groove is provided on the outer wall of the stirring shaft, and the transition groove extends from the bottom end of the outer wall of the stirring shaft to the upper part; a plurality of first vent holes are provided in the transition groove along the axial direction of the stirring shaft, and the diameter of the first vent holes gradually increases from bottom to top.

[0007] Furthermore, the agitation and ventilation assembly includes a central sleeve fitted on the agitator shaft. Multiple agitator blades are evenly spaced along the circumference on the outer wall of the central sleeve. Multiple second flow channels are formed on each agitator blade along its length. The second flow channels communicate with the first vent through a second vent hole formed on the wall of the central sleeve.

[0008] Furthermore, the stirring blade is inclined, and the acute angle formed by the intersection of the plane where the stirring blade is located and the vertical plane is 20°~60°; multiple second flow channels are arranged in parallel.

[0009] Furthermore, the second flow channel is connected to the first air outlet on the front end face of the stirring blade, and the first air outlet is equipped with an air outlet check valve; the air outlet check valve includes a first baffle and a second baffle protruding into the second flow channel, and the first baffle and the second baffle do not contact each other when the air is not flowing; the stirring blade also has multiple second air outlets on the side wall facing the inner wall of the tank, which are connected to the second flow channel; the second air outlets are equipped with air outlet check valve flaps. Furthermore, the stirring chamber is cylindrical, the discharge chamber is conical, and the partition plate is also provided with a material passage connecting the stirring chamber and the discharge chamber.

[0010] Furthermore, a cleaning unit can be detachably installed at the end of the stirring blade away from the stirring shaft. The cleaning unit includes a fixed block, a sealing block, a moving column, and a cleaning plate arranged in sequence. The fixed block is connected to the stirring blade, and an L-shaped guide hole is provided in the fixed block. One end of the L-shaped guide hole is connected to the second air outlet, and the other end is connected to the third air outlet on the upper surface of the fixed block. The lower part of the moving column passes through the sealing block and the third air outlet into the L-shaped guide hole. The diameter of the third air outlet is smaller than the diameter of the L-shaped guide hole. A compression spring is provided between the moving column and the L-shaped guide hole and sleeved on the outside of the moving column. The cleaning plate is sleeved on the upper part of the moving column, and the end of the cleaning plate away from the moving column can contact the inner wall of the tank.

[0011] Furthermore, a limiting surface is provided on the lower outer wall of the movable column, and a limiting block is provided in the L-shaped guide hole, which can cooperate with the limiting surface to rotate and limit the movable column.

[0012] Furthermore, the stirring shaft is connected to the output shaft of a drive motor mounted on the top plate of the tank.

[0013] Furthermore, a scraper is rotatably fitted at the lower end of the rotating shaft, and the end of the scraper away from the moving column can contact the inner wall of the tank.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: (1) The device of the present invention adjusts the amount of CO2 gas entering the tank at different heights by a first vent hole with a diameter that gradually increases from bottom to top through multiple holes opened along the stirring shaft axis; the stirring blades are set at an incline, and when the stirring shaft rotates, the slurry is stirred in an oblique upward direction, which can reduce stratification and improve the stirring effect.

[0015] (2) The device of the present invention, through the second flow channel opened in the stirring blade and the first air outlet opened on the front end face of the stirring blade, and the one-way valve set on the first air outlet, can realize the injection of CO2 gas into multiple positions and layers in the tank, while reducing the probability of slurry entering the flow channel, and indirectly using the force of the gas ejection to promote stirring, saving stirring energy; the device of the present invention greatly improves the stirring and mixing effect of CO2 gas and solid-liquid mixed slurry, so that CO2 gas can be mixed with slurry faster and more evenly, improving the efficiency and effect of negative carbon.

[0016] (3) By setting a second air outlet, the high-pressure gas can enter the slurry through the tail end of the stirring blade, exerting an impact stirring effect on the inner wall that the stirring blade cannot reach, thus preventing excessive slurry from adhering to the inner wall of the tank. By setting a cleaning unit to increase the cleaning area, the slurry adhering to the inner wall of the tank is further reduced, maintaining the slurry stirring effect and avoiding the generation of large particles of solidified material on the inner wall of the tank, which would affect the flow of the mixed slurry.

[0017] (4) The gas flow pipeline formed by the air-filling pipe, transition groove, first air hole and second flow channel of the present invention can also be used as a cleaning pipeline. After a single test, it can be switched to water flow for rinsing so as not to affect the subsequent batching and test results. Moreover, since the water outlet is on the blade, the rinsing effect is good. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the internal structure of the device of the present invention; Figure 3 This is a structural diagram of the assembly of the stirring shaft and the agitation and ventilation components; Figure 4 This is a schematic diagram of the agitation ventilation component. Figure 5 This is a schematic diagram of the exhaust check valve structure; Figure 6 This is a side view of the exhaust check valve; Figure 7 This is a schematic diagram of the one-way valve disc structure for air outlet; Figure 8 This is a schematic diagram of the cleaning unit structure; Figure 9 This is a schematic diagram of the connection structure between the fixing block and the sealing block; Figure 10 This is a schematic diagram of a partial structure of the cleaning unit; Figure 11 This is a schematic diagram of the stirring shaft structure; Figure 12 This is a schematic diagram of the partition structure; Figure 13 This is a schematic diagram of the scraper structure.

[0019] The meanings of the labels in the diagram are as follows: 1-Tank body, 2-Baffle plate, 3-Agitator shaft, 4-Aeration pipe, 5-Agitation and ventilation assembly, 6-Cleaning unit, 7-Drive motor, 8-Scraper; 11-Main slurry inlet, 12-Catalyst addition port, 13-Discharge port, 14-Agitation chamber, 15-Discharge chamber; 21-Passage port; 31-Transition trough, 32-First flow channel; 51-Central sleeve, 52-Agitator blade; 61-Fixing block, 62-Blocking block, 63-Moving column, 64-Cleaning plate, 65-Compression spring; 311-First vent; 521-Second flow channel; 522-First air outlet; 523-Air outlet check valve; 524-Second air outlet; 525-Air outlet check valve disc; 611-L-shaped guide hole; 621-Mounting hole; 622-Limiting block; 631-Limiting surface; 5231-First wind deflector; 5232-Second wind deflector.

[0020] The technical solution of the present invention will be further described below with reference to the embodiments. Detailed Implementation

[0021] Following the above technical solutions, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention. The present invention will be further described in detail below with reference to the embodiments.

[0022] In the description of orientation in this invention, the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate orientation or positional relationships only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Unless otherwise stated, the terms "installed," "connected," "joined," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] The technical terms used in this application are explained below: Coal-based solid waste slurry refers to a slurry-like substance formed by mixing coal-based solid waste (such as coal gangue and fly ash) generated during coal mining and processing with water and auxiliary materials using existing treatment processes. Coal-based solid waste slurry can be used for backfilling in coal mine goaf areas, reducing environmental pollution from solid waste and effectively controlling ground subsidence, thus improving mine safety. Through proper proportioning and process control, the slurry can solidify within the goaf to form a filling body with a certain strength, supporting the roof and preventing rock strata movement.

[0025] Carbon negative: is a state or technology that achieves a net reduction in carbon dioxide, meaning that the amount of carbon dioxide removed from the atmosphere is greater than the amount of carbon dioxide emitted into the atmosphere.

[0026] The technical concept of this invention is as follows: by improving the structure of the integrated CO2 continuous mineralization device for coal-based solid waste, a capacity-enhancing and activating component is added to the coal-based solid waste slurry, CO2 gas is introduced, and the CO2 gas is solidified into the coal-based solid waste slurry through thorough stirring and mixing to achieve the purpose of negative carbon. Finally, the negative carbon cementitious material slurry prepared by this invention is filled into the ground for filling and treatment of goaf or subsidence areas.

[0027] It should be noted that, unless otherwise specified, all components in this invention are components known in the art.

[0028] Example 1 Following the above technical solutions, such as Figures 1 to 13 As shown in the figure, this embodiment provides an integrated device for continuous mineralization of coal-based solid waste into CO2, including a tank 1, a support is provided below the tank 1, a slurry main inlet 11 and a catalyst addition port 12 are provided on the top plate of the tank 1, a discharge port 13 is provided at the bottom of the tank 1, a partition 2 is provided inside the tank 1, the partition 2 divides the inner cavity of the tank 1 into a stirring chamber 14 and a discharge chamber 15, the stirring chamber 14 is connected to the slurry main inlet 11 and the catalyst addition port 12, and the discharge chamber 15 is connected to the discharge port 13; A stirring shaft 3 is vertically installed inside the stirring chamber 14. The top end of the stirring shaft 3 extends from the top plate of the tank body 1 and connects to the drive mechanism that drives the stirring shaft 3 to rotate. The bottom end of the stirring shaft 3 passes through the partition 2 and enters the discharge chamber 15. An air filling pipe 4 is installed inside the discharge chamber 15. The stirring shaft 3 passes through the partition 2 and extends into the air filling pipe 4, and the stirring shaft 3 is sealed to the air outlet end of the air filling pipe 4. A first flow passage 32 is provided inside the stirring shaft 3, which communicates with the air filling pipe 4. Gas supplied through the air filling pipe 4 can enter the first flow passage 32.

[0029] like Figure 3 As shown, multiple agitation and ventilation components 5 are arranged axially at intervals on the stirring shaft 3. In this embodiment, four agitation and ventilation components 5 are arranged at intervals. The agitation and ventilation components 5 can deliver CO2 to different heights within the stirring chamber 14, allowing CO2 to be introduced at multiple positions and levels within the stirring chamber. This greatly improves the mixing effect of CO2 gas and slurry, enabling CO2 to mix with the slurry faster and more uniformly, thus improving the efficiency and effect of carbon negativeing. Each agitation and ventilation component 5 is provided with multiple second flow channels 521. The first flow channel 32 is connected to the stirring chamber 14 via the second flow channels 521, allowing gas entering the first flow channel 32 to enter the stirring chamber 14 via the second flow channels 521.

[0030] As a preferred embodiment of this invention, such as Figure 11 As shown, a transition groove 31 is provided on the outer wall of the stirring shaft 3. The transition groove 31 extends upward from the bottom end of the outer wall of the stirring shaft 3, and its length is greater than 2 / 3 of the overall length of the stirring shaft 2. Multiple first vent holes 311 are provided in the transition groove 31 along the axial direction of the stirring shaft 3. The diameter of the first vent holes 311 gradually increases from bottom to top. After CO2 enters the first flow channel 32, it will move upward along the first flow channel 32 and then enter the stirring and ventilation assembly 5 through the first vent holes 311. Since the distance of CO2 entering the stirring and cleaning assembly through the lower first vent hole 311 is smaller, it is relatively more difficult for the slurry in the upper part of the stirring chamber 14 to come into contact with CO2. The diameter of the upper first vent hole 311 is increased to increase the total amount of CO2 entering the upper first vent hole 311, thereby maintaining the air pressure state in the upper part of the stirring chamber 14.

[0031] As a preferred embodiment of this invention, such as Figures 4 to 6 As shown, the stirring and venting assembly 5 includes a central sleeve 51 sleeved on the stirring shaft 3. Multiple stirring blades 52 are evenly spaced along the circumference on the outer wall of the central sleeve 51. Multiple second flow channels 521 are opened along the length direction of each stirring blade 52. Preferably, three second flow channels 521 are opened. Each second flow channel 521 is connected to a first vent hole 311 through a second vent hole opened on the wall of the central sleeve 51. The second vent hole and the first vent hole 311 are arranged in a one-to-one correspondence.

[0032] Specifically, the upper and lower ends of the central sleeve 51 are sealed to the outer wall of the stirring shaft 2. With the help of the transition groove 31 and the first vent 31, a gap is formed between the inner wall of the middle part and the stirring shaft through the transition groove 31.

[0033] In a preferred embodiment, the stirring blades 52 are inclined, and the inclination direction of the multiple stirring blades 52 is consistent. The acute angle formed by the intersection of the plane where the stirring blades 52 are located and the vertical plane is 20°~60°; multiple second flow channels 521 are arranged in parallel. Preferably, the stirring blades 52 are inclined from top to bottom along the stirring direction, so that the slurry in front of the stirring blades 52 can be inclined upward when the stirring blades 52 rotate. In conjunction with the fact that the diameter of the first vent hole 311 increases from bottom to top, the uniform mixing of CO2 and slurry is achieved.

[0034] In a preferred embodiment, the second flow channel 521 is connected to the first air outlet 522 located on the front end face of the stirring blade 52. The first air outlet 522 is equipped with an air outlet check valve 523. The air outlet check valve 523 includes a first baffle 5231 and a second baffle 5232 protruding into the second flow channel 521. In the non-ventilated state, the first baffle 5231 and the second baffle 5232 do not contact each other, and when air is not supplied, the first baffle 5231 and the second baffle 5232 block… The surface is V-shaped. The first baffle 5231 and the second baffle 5232 each have one side fixedly connected to the side wall of the second flow channel 521, and both the first baffle 5231 and the second baffle 5232 can be made of rubber. When the slurry pressure is high, the exhaust check valve 523 is compressed by the slurry, which can block the second flow channel 521. When the internal gas pressure is greater than the pressure exerted by the external slurry on the exhaust check valve 523, the second flow channel 521 opens to allow gas to enter, reducing the probability of slurry entering the gas passage. Furthermore, when the stirring blade 52 rotates, the pressure on the back of the stirring blade 52 is relatively low, facilitating gas outflow and reducing the input pressure of CO2 gas to a certain extent. The exhaust port is located on the front end face of the stirring blade; high-pressure gas output can assist the stirring action, indirectly utilizing the force of the gas ejection to promote stirring and save stirring energy.

[0035] The stirring blade 52 has multiple second air outlets 524 on its side wall facing the inner wall of the tank 1, which communicate with the second flow channel 521; each second air outlet 524 is equipped with a one-way valve 525. Figure 7 As shown, The one-way valve 525 is made of rubber and is hot-bonded to one end of the second flow channel 521 near the inner wall of the tank 1. In its natural state, its structure is similar to a clustered flower bud. When high-pressure gas passes through, the one-way valve 525 is opened under the action of air pressure. The gas enters the slurry through the gap between the valves and has an impact stirring effect on the edges that the stirring blades 52 cannot reach, which can prevent too much slurry from adhering to the inner wall of the tank 1.

[0036] As a preferred embodiment of this invention, such as Figure 2 As shown, the stirring chamber 14 has a cylindrical structure, and the discharge chamber 15 has a conical structure, as... Figure 13 As shown, the partition 2 is also provided with a material outlet 21 that connects the mixing chamber 14 and the discharge chamber 15.

[0037] As a preferred embodiment, the end of the stirring blade 52 away from the stirring shaft 3 can also be detachably equipped with a cleaning unit 6. In this embodiment, the cleaning units 6 are arranged at intervals. When using the cleaning unit 6, the corresponding one-way valve 525 can be removed.

[0038] like Figures 8 to 10As shown, the cleaning unit 6 includes a fixed block 61, a sealing block 62, a moving column 63, and a cleaning plate 64 arranged in sequence. The fixed block 61 is connected to the stirring blade 52. An L-shaped guide hole 611 is provided in the fixed block 61. One end of the L-shaped guide hole 611 is connected to the second air outlet 524, and the other end is connected to the third air outlet on the upper surface of the fixed block 61. An installation hole 621 is provided vertically in the sealing block 62. The lower part of the moving column 63 passes through the installation hole 621 and the third air outlet into the L-shaped guide hole 611. The diameter of the installation hole 621 is smaller than the diameter of the L-shaped guide hole 611. A compression spring 65 is provided between the moving column 63 and the L-shaped guide hole 611 and is sleeved on the outside of the moving column 63. In this embodiment, a limiting protrusion is provided at the bottom end of the moving column 63 to limit the compression spring 65. The bottom end of the compression spring 65 is in contact with the top surface of the limiting protrusion. The cleaning plate 64 is fitted on the upper part of the moving column 63, and the end of the cleaning plate 64 away from the moving column 63 can contact the inner wall of the tank 1.

[0039] The working process of the cleaning unit 6 is as follows: After CO2 is injected into the L-shaped guide hole 611 through the gas pipe, the air pressure in the L-shaped guide hole 611 increases, which squeezes the moving column 63 to move upward. The compression spring 65 sleeved on the moving column 63 is compressed as the moving column 63 moves upward. When the amount and speed of CO2 injection decrease, the compression spring 65 returns to its original position due to its own elasticity, which drives the moving column 63 to move downward.

[0040] As a preferred embodiment, a limiting surface 631 is provided on the lower outer wall of the movable column 63, and a limiting block 622 is provided in the mounting hole 621, which can cooperate with the limiting surface 631 to rotate and limit the movable column 63.

[0041] In a preferred embodiment, the stirring shaft 3 is connected to the output shaft of the drive motor 7 mounted on the top plate of the tank 1. The drive motor 7 is powered by a battery, which can be installed on the top of the tank 1 or placed near the tank 1.

[0042] As a preferred embodiment, a scraper 8 is rotatably sleeved at the lower end of the stirring shaft 2, and the end of the scraper 8 away from the moving column 63 can contact the inner wall of the tank 1.

[0043] The process of using this invention is as follows: The prepared coal-based solid waste slurry and capacity-enhancing and activating components are added into the tank 1 through the main slurry inlet 11 and the catalyst addition port 12. Both the coal-based solid waste slurry and the capacity-enhancing and activating components are existing materials. The drive motor is started, which drives the stirring shaft 2 to rotate. CO2 extracted from the industrial waste gas enters the stirring shaft 2 through the gas filling pipe 9, instantly filling the first flow channel 32. Then, it enters the second flow channel 521 through the first vent hole 311. The one-way valve 523 and the one-way valve disc 525 are opened by the impact of high-pressure gas. With the stirring of the stirring blade 52, CO2 flows to different height positions in the stirring chamber, increasing the contact area between CO2 and slurry, and making the distribution and mixing of gas, liquid and solid more uniform. During the process of CO2 being introduced into the slurry, the compression spring 804 contracts under the pressure of CO2, causing the moving column 803 to move upward. The cleaning strip 805 moves upward during rotation to remove the slurry adhering to higher positions. When the amount of CO2 gas introduced decreases, the compression spring 804 returns to its original position, and the moving column 803 moves downward, removing the slurry adhering to lower positions on the inner wall of the tank 1. Thus, during the stirring process of the stirring shaft 2, the cleaning strip 805 can float up and down within a certain height range to form a cleaning area, further reducing the adhesion of slurry on the side wall, maintaining the stirring effect of the slurry, and avoiding the generation of large particles of coagulated matter that affect the flow of the mixed slurry.

[0044] After the above test is completed, the air filling pipe 4 is changed to the cleaning filling pipe, and clean water is introduced for rinsing. Using the air outlet one-way valve 523 and air outlet one-way valve disc 525 on the stirring blade 52, the cleaning liquid is filled into the tank 1 during the stirring process of the stirring blade 52. In addition, the cleaning strip 805 moves back and forth within a small range to achieve effective automatic cleaning.

[0045] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0046] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0047] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content invented by this disclosure.

Claims

1. A continuous mineralization CO2 integrated device for coal-based solid waste, comprising a tank (1), wherein the top plate of the tank (1) is provided with a slurry main inlet (11) and a catalyst addition port (12), and the bottom of the tank (1) is provided with a discharge port (13), characterized in that, The tank (1) is provided with a partition (2), which divides the inner cavity of the tank (1) into a stirring chamber (14) and a discharge chamber (15). The stirring chamber (14) is connected to the slurry main inlet (11) and the catalyst addition port (12), and the discharge chamber (15) is connected to the discharge port (13). A stirring shaft (3) is vertically arranged in the stirring chamber (14), and an air-filling pipe (4) is provided in the discharge chamber (15). The stirring shaft (3) extends through the partition (2) into the air-filling pipe (4), and a first flow channel (32) communicating with the air-filling pipe (4) is provided in the stirring shaft (3). Multiple agitation and ventilation components (5) are arranged axially on the stirring shaft (3), and each agitation and ventilation component (5) is provided with multiple second flow channels (521). The first flow channel (32) is connected to the stirring chamber (14) through the second flow channel (521). A transition groove (31) is provided on the outer wall of the stirring shaft (3), and the transition groove (31) extends from the bottom end of the outer wall of the stirring shaft (3) upward; a plurality of first vent holes (311) are provided in the transition groove (31) along the axial direction of the stirring shaft (3), and the diameter of the first vent holes (311) gradually increases from bottom to top; The agitation and ventilation assembly (5) includes a central sleeve (51) sleeved on the agitator shaft (3). Multiple agitator blades (52) are evenly spaced along the circumference on the outer wall of the central sleeve (51). Multiple second flow channels (521) are opened along the length direction of each agitator blade (52). The second flow channels (521) are connected to the first vent (311) through a second vent hole opened on the wall of the central sleeve (51). The second flow passage (521) is connected to the first air outlet (522) on the front end face of the stirring blade (52). The first air outlet (522) is provided with an air outlet check valve (523). The air outlet check valve (523) includes a first baffle strip (5231) and a second baffle strip (5232) protruding into the second flow passage (521). In the non-ventilated state, the first baffle strip (5231) and the second baffle strip (5232) do not contact each other. The stirring blade (52) is also provided with a plurality of second air outlets (524) on the side wall facing the inner wall of the tank (1) and connected to the second flow passage (521). The second air outlet (524) is provided with an air outlet check valve flap (525). The stirring blade (52) can also be detachably mounted with a cleaning unit (6) at the end away from the stirring shaft (3). The cleaning unit (6) includes a fixed block (61), a blocking block (62), a moving column (63), and a cleaning plate (64) arranged in sequence. The fixed block (61) is connected to the stirring blade (52). An L-shaped guide hole (611) is opened in the fixed block (61). One end of the L-shaped guide hole (611) is connected to the second air outlet (524), and the other end is connected to the third air outlet opened on the upper surface of the fixed block (61). The blocking block (62) is detachably mounted with a cleaning unit (64). An installation hole (621) is vertically opened along the inner edge of the moving column (63). The lower part of the moving column (63) passes through the installation hole (621) and the third air outlet into the L-shaped guide hole (611). The diameter of the installation hole (621) is smaller than the diameter of the L-shaped guide hole (611). A compression spring (65) is provided between the moving column (63) and the L-shaped guide hole (611) and is sleeved on the outside of the moving column (63). The cleaning plate (64) is sleeved on the upper part of the moving column (63). The end of the cleaning plate (64) away from the moving column (63) can contact the inner wall of the tank (1).

2. The integrated coal-based solid waste continuous mineralization CO2 device as described in claim 1, characterized in that, The stirring blade (52) is inclined, and the acute angle formed by the intersection of the plane where the stirring blade (52) is located and the vertical plane is 20°~60°; multiple second flow channels (521) are arranged in parallel.

3. The integrated coal-based solid waste continuous mineralization CO2 device as described in claim 1, characterized in that, The stirring chamber (14) is cylindrical, the discharge chamber (15) is conical, and the partition (2) is also provided with a material passage (21) connecting the stirring chamber (14) and the discharge chamber (15).

4. The integrated coal-based solid waste continuous mineralization CO2 device as described in claim 1, characterized in that, The outer wall of the movable column (63) is provided with a limiting surface (631), and the mounting hole (621) is provided with a limiting block (622) that can cooperate with the limiting surface (631) to rotate and limit the movable column (63).

5. The integrated coal-based solid waste continuous mineralization CO2 device as described in claim 1, characterized in that, The stirring shaft (3) is connected to the output shaft of the drive motor (7) located on the top plate of the tank (1).

6. The integrated coal-based solid waste continuous mineralization CO2 device as described in claim 1, characterized in that, The lower end of the stirring shaft (3) is also fitted with a scraper (8), and the end of the scraper (8) away from the moving column (63) can contact the inner wall of the tank (1).

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