Multi-parameter reaction control device for underground co 2 mineralization of coal-based solid waste

Abstract

Disclosed in the present invention is a multi-parameter reaction control device for underground CO2 mineralization of coal-based solid waste, comprising a cavity, a stirring and gas supply system, and a monitoring control system. The cavity comprises a housing and an inner container. The housing is provided with a cavity cover. A thermal interlayer is provided between the housing and the inner container. The thermal interlayer is filled with a heat transfer medium and is communicated with an external heat circulation system. The external heat circulation system is used for regulating the temperature of the heat transfer medium in the thermal interlayer. A feed port and a discharge port are respectively formed in the upper end and lower end of the cavity. The stirring and gas supply system is used for inputting CO2 into the inner container and performing stirring. The monitoring control system comprises a gas pressure sensor, a safety valve, a pressure relief valve, a pH sensor, a solid-liquid addition port, a temperature sensor, and a CO2 mineralization extent sensor. The gas pressure sensor, the safety valve, the pressure relief valve and the solid-liquid addition port are connected to the cavity by means of the cavity cover. The pH sensor and the temperature sensor are located in the inner container. The CO2 mineralization extent sensor is arranged at an inlet end of the discharge port. The device can monitor and control the extent of CO2 mineralization of coal-based solid waste.

Description

A multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste Technical Field

[0001] The present invention relates to the field of coal-based solid waste mineralization CO2 reaction devices, and in particular to an underground coal-based solid waste CO2 mineralization multi-parameter reaction control device. Background Art

[0002] Driven by the "Dual Carbon Strategy," coal-based solid waste disposal faces new opportunities and challenges, including industrial upgrading, large-scale disposal, and resource utilization. In-depth research on the theories and technologies for green, efficient, and carbon-negative disposal of coal-based solid waste is urgent. Coal-based solid waste primarily consists of Al₂O₃ and SiO₂, similar to the primary components of zeolites. Mineralizing CO₂ from coal-based solid waste to prepare carbon-negative filling materials, compared to simply piling and landfilling coal-based solid waste, can address the environmental pollution problem of toxic trace element leaching caused by coal-based solid waste storage, while also achieving carbon emissions reduction and enabling comprehensive utilization of coal-based solid waste. Using coal-based solid waste materials for CO₂ adsorption, mineralization, and storage is not only an inevitable requirement for the green transformation of the coal industry in the new era, but also a strategic option for the coal mining sector to achieve resource utilization of mine solid waste and rapidly advance toward the dual carbon goals. However, existing mineralization instruments suffer from low mineralization efficiency and difficulty monitoring and controlling the degree of mineralization of coal-based solid waste, failing to meet the requirements of carbon-negative filling in modern mines. Summary of the Invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide an underground coal-based solid waste CO2 mineralization multi-parameter reaction control device, which can not only realize the coal-based solid waste mineralization CO2, but also monitor and regulate the coal-based solid waste mineralization CO2 effect.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides an underground coal-based solid waste CO2 mineralization multi-parameter reaction control device, comprising a cavity, a stirring and air supply system, and a monitoring and control system. The cavity comprises an outer shell and an inner liner. The inner liner is disposed within the outer shell and is compressed and fixed by a cavity cover of the outer shell opening. A thermal interlayer is left between the inner wall of the outer shell and the outer wall of the inner liner. The thermal interlayer is filled with a heat transfer medium and is connected to an external heat circulation system; the external heat circulation system is used to control the temperature of the heat transfer medium in the thermal interlayer; the upper and lower ends of the cavity are respectively provided with a feed port and a discharge port connected to the inner cavity of the inner liner;

[0006] The stirring system includes a motor fixed to the bottom of the shell, the output shaft of the motor passes through the inner tank and extends into the inner cavity thereof and is fixedly connected to a hollow stirring paddle to control its rotation, an hollow air tube is nested outside the output shaft of the motor, the upper end of the hollow air tube extends into the inner tank and is rotatably connected to the middle of the hollow stirring paddle and communicates with its internal cavity, the lower end of the hollow air tube is fixed to the periphery of the motor output shaft and is connected to an air intake pipe, the air intake pipe is connected to an external CO2 gas source and is provided with an air intake regulating valve; the hollow stirring paddle is cross-shaped and has a plurality of air nozzles at the bottom;

[0007] The monitoring and control system includes a gas pressure sensor, a safety valve, a pressure relief valve and a solid-liquid addition port, which are arranged on the cavity cover and connected to the inner tank cavity; a CO2 mineralization sensor is provided at one end of the discharge port close to the inner tank; a pH sensor and a temperature sensor are provided on the inner wall of the inner tank above the CO2 mineralization sensor; the gas discharged from the pressure relief valve is connected to the air inlet pipe and circulates into the inner cavity of the inner tank.

[0008] Preferably, the external heat circulation system includes a pump body, the output end of the pump body is connected to a water inlet pipe, the water inlet pipe is provided with a heater and a temperature regulating valve and is connected to the inlet of the heat interlayer, the temperature of the mineralization reaction is changed by adjusting the temperature regulating valve to control the heater, and the pressure conditions of the mineralization reaction are changed by adjusting the pressure relief valve.

[0009] Preferably, the solid-liquid addition port includes two solid phase channels and liquid phase channels respectively connected to the inner tank, a solid phase addition port is provided at the upper end of the solid phase channel, a liquid phase addition port is provided at the upper end of the liquid phase channel, a solid phase valve is provided on the solid phase channel, and a liquid phase valve is provided on the liquid phase channel.

[0010] Preferably, the hollow stirring paddle includes a cylindrical body, which is hollow and has four paddle rods connected to its inner cavity fixedly connected to its outer wall. The paddle rods are hollow inside and have air nozzles at their bottoms. The middle part of the bottom plate of the cylindrical body is fixedly connected to the output shaft of the motor, and the upper end of the hollow air tube is embedded in the inner cavity of the cylindrical body and is rotatably connected to it.

[0011] Preferably, the housing and the cavity cover are fixed by bolts, and a sealing ring is provided at the connection.

[0012] Preferably, the cavity cover is provided with a notch adapted to the port of the liner to facilitate compression thereof, and the port of the liner is provided with an annular support to be compressed against the opening of the shell.

[0013] Preferably, the heat transfer medium used in the thermal interlayer is water.

[0014] Preferably, a through hole is opened at the bottom of the housing for fixing the motor.

[0015] The beneficial effects of the present invention are that, compared with existing technologies, it not only achieves the mineralization of coal-based solid waste into CO2, but also monitors and regulates the effect of this mineralization. This device can meet the high-temperature and high-pressure requirements of coal-based solid waste mineralization by adjusting the internal temperature and pressure. By adjusting the pH to change the acid-base environment of the mineralization, it can regulate the mineralization rate and effect of the coal-based solid waste mineralization CO2, thereby meeting the requirements of mines for filling materials with different mineralization degrees. This device has broad application prospects in underground negative carbon filling and mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] FIG1 is a schematic structural diagram of a multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste provided by an embodiment of the present invention;

[0018] FIG2 is a schematic structural diagram of a hollow stirring paddle provided in an embodiment of the present invention.

[0019] Explanation of the accompanying drawings: 1-shell, 2-thermal interlayer, 3-inner liner, 4-cavity cover, 5-bolt, 6-sealing ring, 7-feed port, 8-discharge port, 9-hollow stirring paddle, 10-motor, 11-hollow air pipe, 12-inlet pipe, 13-inlet regulating valve, 14-CO2 mineralization sensor, 15-nozzle, 16-gas pressure sensor, 17-safety valve, 18-pressure relief valve, 19-pH sensor, 20-solid-liquid addition port, 21-temperature sensor, 22-heater, 23-pump body, 24-temperature regulating valve, 25-solid phase addition port, 26-liquid phase addition port, 27-solid phase valve, 28-liquid phase valve. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] As shown in Figures 1 and 2, a multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste is particularly suitable for negative carbon filling mining technology in underground mines, including a cavity, a stirring and air supply system, and a monitoring and control system. The cavity includes an outer shell 1 and an inner liner 3. The inner liner 3 is arranged in the outer shell 1 and is pressed and fixed by a cavity cover 4 opened by the outer shell 1. The outer shell 1 and the cavity cover 4 are connected and fixed by bolts 5, and a sealing ring 6 is provided at the connection; a thermal interlayer 2 is left between the inner wall of the outer shell 1 and the outer wall of the inner liner 3, and the thermal interlayer 2 is filled with a heat transfer medium and connected to an external heat circulation system. The heat transfer medium is water; the external heat circulation system is used to regulate the temperature of the heat transfer medium in the thermal interlayer 2; the upper and lower ends of the cavity are respectively provided with a feed port 7 and a discharge port 8 connected to the inner cavity of the inner liner 3;

[0022] The stirring system includes a motor 10 fixed to the bottom of the shell 1, and the output shaft of the motor 10 passes through the inner tank 3 and penetrates into its inner cavity and is fixedly connected to the hollow stirring paddle 9 to control its rotation. An hollow air pipe 11 is also nested on the outside of the output shaft of the motor 10. The upper end of the hollow air pipe 11 extends into the inner tank 3 and is rotatably connected to the middle of the hollow stirring paddle 9 and communicates with its internal cavity. The lower end of the hollow air pipe 11 is fixed to the periphery of the output shaft of the motor 10 and is connected to an air intake pipe 12. The air intake pipe 12 is connected to an external CO2 gas source and is provided with an air intake regulating valve 13; the hollow stirring paddle 9 is cross-shaped and has a plurality of air nozzles 15 at the bottom;

[0023] The monitoring and control system includes a gas pressure sensor 16, a safety valve 17, a pressure relief valve 18 and a solid-liquid addition port 20, which are arranged on the cavity cover 4 and connected to the cavity of the inner liner 3; a CO2 mineralization sensor 14 is provided at one end of the discharge port 8 close to the inner liner 3; a pH sensor 19 and a temperature sensor 21 are provided on the inner wall of the inner liner 3 above the CO2 mineralization sensor 14; the gas discharged from the pressure relief valve 18 is connected to the air inlet pipe 12 and circulates into the inner cavity of the inner liner 3.

[0024] Preferably, the external heat circulation system includes a pump body 23, the output end of the pump body 23 is connected to the water inlet pipe, the water inlet pipe is provided with a heater 22 and a temperature regulating valve 24 and is connected to the inlet of the heat interlayer 2, the temperature of the mineralization reaction is changed by adjusting the temperature regulating valve 24, and the pressure conditions of the mineralization reaction are changed by adjusting the pressure relief valve 18.

[0025] The solid-liquid addition port 20 includes two solid phase channels and a liquid phase channel respectively connected to the inner tank 3. A solid phase addition port 25 is provided at the upper end of the solid phase channel, and a liquid phase addition port 26 is provided at the upper end of the liquid phase channel. A solid phase valve 27 is provided on the solid phase channel, and a liquid phase valve 28 is provided on the liquid phase channel.

[0026] The hollow stirring paddle 9 includes a cylindrical body, which is hollow and has four paddle rods connected to its inner cavity fixedly connected to its outer wall. The paddle rods are hollow inside and have air nozzles 15 at their bottoms. The middle part of the bottom plate of the cylindrical body is fixedly connected to the output shaft of the motor 10, and the upper end of the hollow air tube 11 is embedded in the inner cavity of the cylindrical body and is rotatably connected to it.

[0027] The cavity cover 4 is provided with a notch adapted to the port of the inner liner 3 for easy compression, and the port of the inner liner 3 is provided with an annular support to press tightly against the opening of the shell 1. The top of the shell 1 is provided with a through hole for fixing the motor 10.

[0028] Before feeding at the feed port 7, first open the air inlet regulating valve 13 to prevent the slurry from clogging the air nozzle 15. During the process of stirring the slurry by the hollow stirring paddle 9, use the CO2 mineralization sensor 14 to monitor the CO2 degree of coal-based solid waste mineralization. By adjusting the temperature regulating valve 24 and the pressure relief valve 18, change the temperature and pressure conditions of the mineralization reaction. Additives such as chemicals are added through the solid-liquid addition port 20 to change the pH value of the mineralization reaction. When the mineralization degree reaches the requirement, open the discharge port 8 to carry out the negative carbon filling process.

[0029] Those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste, characterized in that: The invention comprises a cavity, a stirring and air supplying system and a monitoring and control system, wherein the cavity comprises an outer shell (1) and an inner liner (3), wherein the inner liner (3) is arranged in the outer shell (1) and is fixed by a cavity cover (4) opened by the outer shell (1), and a heat interlayer (2) is left between the inner wall of the outer shell (1) and the outer wall of the inner liner (3), wherein the heat interlayer (2) is filled with a heat transfer medium and is connected to an external heat circulation system; the external heat circulation system is used to regulate the temperature of the heat transfer medium in the heat interlayer (2); the upper end and the lower end of the cavity are respectively provided with a feed port (7) and a discharge port (8) connected to the inner cavity of the inner liner (3); The stirring system comprises a motor (10) fixed to the bottom of the shell (1), the output shaft of the motor (10) passes through the inner liner (3) and penetrates into the inner cavity thereof and is fixedly connected to the hollow stirring paddle (9) to control its rotation, and an hollow air pipe (11) is nested outside the output shaft of the motor (10), the upper end of the hollow air pipe (11) extends into the inner liner (3) and is rotatably connected to the middle of the hollow stirring paddle (9) and communicates with its internal cavity, the lower end of the hollow air pipe (11) is fixed to the outer periphery of the output shaft of the motor (10) and is connected to an air intake pipe (12), the air intake pipe (12) is connected to an external CO2 gas source and is provided with an air intake regulating valve (13); the hollow stirring paddle (9) is cross-shaped and is provided with a plurality of air nozzles (15) at the bottom; The monitoring and control system comprises a gas pressure sensor (16), a safety valve (17), a pressure relief valve (18), and a solid-liquid addition port (20) which are arranged on the cavity cover (4) and connected to the cavity of the inner liner (3); a CO2 mineralization sensor (14) is provided at one end of the discharge port (8) close to the inner liner (3); a pH sensor (19) and a temperature sensor (21) are provided on the inner wall of the inner liner (3) above the CO2 mineralization sensor (14); and the gas discharged from the pressure relief valve (18) is connected to the air inlet pipe (12) and circulates into the inner cavity of the inner liner (3).

2. The multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste according to claim 1, characterized in that: The external heat circulation system comprises a pump body (23), the output end of the pump body (23) is connected to a water inlet pipe, the water inlet pipe is provided with a heater (22) and a temperature regulating valve (24) and is connected to the inlet of the heat interlayer (2), the temperature regulating valve (24) is adjusted to control the heater (22) to change the mineralization reaction temperature, and the pressure condition of the mineralization reaction is changed by adjusting the pressure relief valve (18).

3. The multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste according to claim 1, characterized in that: The solid-liquid addition port (20) comprises two solid-phase channels and a liquid-phase channel respectively connected to the inner container (3); a solid-phase addition port (25) is provided at the upper end of the solid-phase channel, a liquid-phase addition port (26) is provided at the upper end of the liquid-phase channel, a solid-phase valve (27) is provided on the solid-phase channel, and a liquid-phase valve (28) is provided on the liquid-phase channel.

4. The multi-parameter reaction control device for underground coal-based solid waste CO2 mineralization according to claim 1, characterized in that: The hollow stirring paddle (9) comprises a cylindrical body, the cylindrical body is hollow and its outer wall is fixedly connected to four paddle rods communicating with its inner cavity, the paddle rods are hollow inside and an air jet nozzle (15) is provided at the bottom, the middle of the bottom plate of the cylindrical body is fixedly connected to the output shaft of the motor (10), and the upper end of the hollow tube (11) is embedded in the inner cavity of the cylindrical body and is rotatably connected to it.

5. The multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste according to claim 1, characterized in that: The housing (1) and the cavity cover (4) are connected and fixed by bolts (5), and a sealing ring (6) is provided at the connection point.

6. The multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste according to claim 1, characterized in that: The cavity cover (4) is provided with a notch adapted to the port of the inner liner (3) to facilitate compaction thereof, and the port of the inner liner (3) is provided with an annular support to be compacted at the opening of the outer shell (1).

7. The multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste according to claim 1, characterized in that: The heat transfer medium used in the thermal interlayer (2) is water.

8. The multi-parameter reaction control device for CO2 mineralization of underground coal-based solid waste according to claim 1, characterized in that: The bottom of the housing (1) is provided with a through hole for fixing the motor (10).

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