Integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw

Abstract

The invention relates to an integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw. The integrated preparation device comprises a carbonization system, a feeding system, a ball milling system, a magnetic separation system, a liquid circulation system and a drying system, wherein the carbonization system consists of a tubular furnace, and an inert gas valve is arranged at the opening of the tubular furnace; the feeding system comprises a storage unit, a micro rotary stirrer, a feeding pipeline and a valve, the micro rotary stirrer is mounted at a feeding main branch pipeline opening, and a feeding branch pipeline and a tubular furnace discharging opening are combined into a ball mill feeding opening; the ball milling system comprises a ball milling tank, a material conveying pipeline and an exhaust port; materials enter the magnetic separation box, the magnetic separation system comprises the magnetic separation box, an electromagnet, a material storage box, a discharging branch channel and a feeding branch pipe, the electromagnet is installed on the mechanical arm, and the material storage box and the magnetic separation box are arranged in parallel; wastewater in the magnetic separation box enters a liquid circulation system, and the liquid circulation system comprises a centrifugal machine, an automatic telescopic device, a liquid conveying pipeline and a liquid outlet pipeline which are combined with a feeding branch pipe; the drying system comprises a dryer and a feeding pipeline. The integrated preparation device for the magnetic porous carbon adsorption material is designed, liquid needed by magnetic separation is recycled, and the purposes of efficient integrated preparation of the material and environmental protection are achieved.

Description

Technical Field

[0001] This invention patent belongs to the field of magnetic porous carbon adsorption material preparation technology, specifically an integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw. Background Technology

[0002] Straw is difficult to recycle in nature. If it is burned, it will cause great harm to nature and pollute the air. Moreover, biochar usually enters the environment in the form of fine particles with low density, which makes it easy to disperse in soil and water and difficult to separate.

[0003] At present, magnetic porous carbon adsorption materials are mostly used in the field of environmental remediation. They can be used for the adsorption of heavy metals in soil and have a wide range of applications. Therefore, the preparation efficiency and effect of the materials cannot be ignored. In order to ensure the quality of magnetic porous carbon while meeting the requirements of large-scale production, integrated preparation equipment is particularly important.

[0004] The preparation of magnetic porous carbon materials requires a series of operations such as high-temperature carbonization, ball milling, magnetic separation purification, washing and drying. Existing preparation devices are few, inefficient and have low safety. In order to realize the integrated production of magnetic porous carbon materials and reduce the loss of manpower and material resources, we propose an integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw. Summary of the Invention

[0005] The problem to be solved by this invention is to provide an integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw. The device is designed to integrate high-temperature carbonization, ball milling, magnetic separation and purification, washing and drying, as well as an integrated waste gas recovery and treatment device. This device can achieve efficient preparation of such magnetic materials, while saving manpower and material resources and recovering some waste gas.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated device for preparing magnetic porous carbon, characterized in that it includes a carbonization system, a feeding system, a ball milling system, a magnetic separation system, a liquid circulation system, and a drying system; The carbonization system includes a tubular furnace and inert gas valves; The feeding system is connected to the outlet of the carbonization system and includes a storage unit, a micro rotary agitator, and a feeding pipe. The ball mill system is connected to the main discharge port of the feeding system and the feed port of the ball mill, and includes a ball mill jar, a conveying pipe, and an exhaust port; The magnetic separation system is connected to the ball milling system and includes a magnetic separator, an electromagnet, a storage box, a discharge branch pipe, a robotic arm, and a feed branch pipe. The liquid circulation system is connected to the magnetic separation system and includes a centrifuge, a liquid delivery pipeline, an automatic telescopic device, and a centrifuge discharge pipeline. The drying system is connected to the magnetic separation system and includes a dryer; In a preferred embodiment of the present invention, the material storage unit in the feeding system includes a magnetite supply unit and an agate ball supply unit; The carbonization system includes an organic material supply unit such as straw and a coal gangue supply unit; the tubular furnace has two layers, with embedded heating wires and external heat insulation; In a preferred embodiment of the present invention, a micro rotary agitator is installed at the main discharge port to prevent material units from clumping.

[0007] The main branch pipe of the feeding system and the outlet of the tubular furnace are combined into the feed inlet and feed funnel of the ball mill.

[0008] In a preferred embodiment of the present invention, the ball milling system has a filter screen added to the end of the ball milling jar, and the bottom is connected to the magnetic separation system by a pipe. The filter screen is discharged through the exhaust port through the exhaust gas, and the inert gas valve is closed after the preparation is completed.

[0009] In a preferred embodiment of the present invention, in the magnetic separation system, the material enters the magnetic separation box through the feed pipe, the magnetic separation box and the storage box are placed side by side, and after the magnetic separation is completed, the robotic arm moves the electromagnet above the storage box.

[0010] In a preferred embodiment of the present invention, in the liquid circulation system, the wastewater in the magnetic separation box after magnetic separation enters the centrifuge through the inlet pipe. Centrifugation separates the solid and liquid. After centrifugation, the liquid enters the feed branch pipe through the outlet pipe and then enters the magnetic separation box for recycling. Impurities need to be prepared and scraped off with a scraper.

[0011] Both the inlet and outlet pipes are equipped with automatic telescopic shells to control the expansion and contraction of the pipes before and after the centrifugation process.

[0012] In a preferred embodiment of the present invention, the drying system drying device is divided into an inner bladder and an outer layer. The outer layer is embedded with heating wires, and the inner bladder wall is embedded with a fan, so as to jointly dry the material.

[0013] The feeding pipelines are all equipped with valves for control, and a powder conveying pump is installed to connect the powder conveying pipelines to the feed inlet; the feeding pipelines include liquid conveying pipelines and powder conveying pipelines, both of which are controlled by valves and conveying pumps.

[0014] This invention provides an integrated preparation method for preparing magnetic porous carbon based on coal gangue and straw, which can achieve efficient, batch, and stable preparation of ball-milled materials, while separating ball-milled impurities, thus making the prepared materials stable and improving product purity.

[0015] Beneficial effects: The feeding system designed in this patented invention has distinct units, which can accurately determine the amount of material to be fed. The micro-rotating agitator installed at the discharge port can prevent the units from clumping together, so that the materials are mixed evenly. It has the advantages of uniformity, controllability and accuracy.

[0016] This invention involves first carbonizing straw and other materials at high temperatures, then grinding them together with other materials in a ball mill using agate balls. The ratio of each material, including the agate balls, can be adjusted as needed. The grinding process utilizes friction and other forces to promote grain refinement, improve powder activity, and achieve uniform particle distribution.

[0017] This invention removes impurities from materials using wet magnetic separation, ensuring the purity of magnetic porous carbon. It utilizes centrifugal solid-liquid separation and recycling, and the water required in the magnetic separation box is recycled, making the preparation process more environmentally friendly and energy-saving. The gentle separation in the liquid medium can preserve the integrity of the pores and simultaneously clean impurities to a certain extent.

[0018] This invention proposes an integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw. It is highly practical, saves manpower and resources, has a wide range of applications, and efficiently prepares high-quality magnetic porous carbon. Most of these devices are used in the fields of water pollution and environmental remediation, and can be used for the adsorption of heavy metals in water treatment. Its applications are quite extensive. Attached Figure Description

[0019] Figure 1 This is a flowchart of an integrated device for magnetic porous carbon adsorption materials; Figure 2 This is a schematic diagram of a tubular furnace; Figure 3 This is a schematic diagram of a ball mill jar; Figure 4 This is a schematic diagram of a magnetic separator; Figure 5 This is a schematic diagram of a centrifuge. Explanation of reference numerals in the attached figures In the diagram, 1. Storage unit; 2. Powder conveying pipeline valve; 3. Powder conveying pipeline; 4. Powder conveying pump; 5. Tube furnace; 51. Inert gas valve; 52. Gas conveying pipeline; 53. Heating wire; 54. Discharge pipeline; 55. Tube furnace valve; 56. Material conveying pump; 6. Ball mill; 601. Ball mill inlet; 602. Miniature rotary stirrer; 603. Inlet pipeline valve; 604. Conveying pipeline; 605. Ball mill jar; 606. Filter screen; 607. Gas conveying valve; 608. Gas conveying pipeline; 609. Exhaust port; 610. Discharge pipeline valve; 611. Material conveying pump; 61... 2. Discharge pipe; 7. Magnetic separator box; 71. Feed branch pipe; 72. Robotic arm; 73. Electromagnet; 74. Plastic sheet; 75. Storage box; 76. Main material discharge pipe; 77. Main material discharge pipe valve; 78. Main material transfer pump; 8. Centrifuge; 81. Centrifuge tank; 82. Liquid input pump; 83. Liquid inlet pipe valve; 84. Liquid inlet pipe; 85. Liquid outlet pipe; 86. Liquid outlet pipe valve; 87. Liquid transfer pump; 88. Automatic telescopic device; 9. Heating wire; 10. Air box. Detailed Implementation

[0020] The objectives and technical solutions of the embodiments of the present invention will be explained below with reference to the accompanying drawings. The following is a complete description. It should be noted that the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] Please see Figure 1 The embodiments of the present invention include: An integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw includes a feeding system I, a carbonization system II, a ball milling system III, a liquid circulation system IV, a magnetic separation system V, and a drying system VI. This invention designs an integrated preparation device for magnetic porous carbon adsorbent materials, recycling wastewater to achieve efficient integrated preparation of the material in a green and environmentally friendly manner.

[0022] The feeding system includes a storage unit 1 and a feeding pipe. For powdery materials, a powder conveying pipe 3 is provided, and a powder conveying pump 4 is provided at the outlet of the pipe. When the powder conveying pipe valve 2 and the powder conveying pump 4 are opened, the material particles are conveyed in the airflow direction in the closed pipe by using the dynamic and static pressure of the air.

[0023] The carbonization device includes a tubular furnace 5, an inert gas valve 51, a gas supply pipe 52, a heating wire 53, a discharge pipe 54, a tubular furnace valve 55, and a material conveying pump 56. The tubular furnace has two layers, an inner and an outer layer. The heating wire 54 is embedded in the outer layer and is insulated from the inner wall of the furnace tube to avoid short circuits. An inert gas valve 51 is installed at the upper end of the tubular furnace 5. Inert gas is introduced into the tubular furnace and the entire device through the gas supply pipe 52 to provide an inert gas atmosphere for stable material reaction. After high-temperature carbonization, the tubular furnace valve 55 and the material conveying pump 56 are opened. The dynamic and static pressure of the air is used to transport the carbonized material into the ball mill feed inlet 601 in the closed pipe along the airflow direction.

[0024] The ball milling system includes a ball mill 6, a ball mill inlet 601, a micro rotary agitator 602, an inlet pipe valve 603, a conveying pipe 604, a ball mill jar 605, a filter screen 606, a gas supply valve 607, a gas supply pipe 608, an exhaust port 609, a discharge pipe valve 610, a material conveying pump 611, and a discharge pipe 612. The ball mill inlet 601 is formed by combining the powder conveying pipe 3 and the discharge pipe 54. The micro rotary agitator 602 is installed at the ball mill inlet 601 and consists of several blades. During operation, it rotates and stirs the material. After all the material enters, it is roughly broken up by the micro rotary agitator 602, so that the material is in full contact and does not clump, making it easier to enter the ball mill jar 605 for ball milling. After ball milling, open the gas supply valve 607. The waste gas is discharged from the exhaust port 609 through the gas supply pipe 608 along with the inert gas flow. The exhaust is carried out in the laboratory fume hood. A filter screen 606 is installed at the end of the ball mill jar 605 to prevent material from being lost with the air flow. After a period of time, close the inert gas valve 51 and open the total material delivery pump 611. The total material passes through the discharge pipe 612.

[0025] The magnetic separation system includes a magnetic separation box 7, a feed branch pipe 71, a robotic arm 72, an electromagnet 73, a plastic sheet 74, a storage box 75, a main material discharge pipe 76, a main material discharge pipe valve 77, and a main material conveying pump 78. The material enters the magnetic separation box 7 through the feed branch pipe 71. Initially, water is added to the magnetic separation box 7. The electromagnet 73 at the end of the robotic arm 72 is wrapped in the plastic sheet 74 and immersed in the suspension to adsorb magnetic porous carbon. After the magnetic separation is completed, the robotic arm 72 moves the electromagnet 73 above the storage box 75. The power is turned off, causing the electromagnet 73 to lose its magnetism, and the material falls into the storage box 75, completing the collection of the material.

[0026] The liquid circulation system includes a centrifuge 8, a centrifuge tank 81, a liquid input pump 82, an inlet pipe valve 83, a delivery pipe 84, an outlet pipe 85, an outlet pipe valve 86, a liquid transfer pump 87, and an automatic telescopic device 88. After magnetic separation, the inlet pipe valve 83 is opened, the liquid input pump 82 is started, and wastewater enters the centrifuge tank 81. The automatic telescopic device 88 retracts upwards and leaves the centrifuge 8, and the centrifuge tank 81 is started. After centrifugation, the automatic telescopic device 88 lowers the outlet pipe into the centrifuge 8, the outlet pipe valve 86 is opened, and the liquid transfer pump 87 is started. The processed liquid enters the magnetic separator 7 through the inlet branch pipe 71 via the outlet pipe 85, realizing the recycling of the liquid. After the preparation of impurities in the centrifuge 8 is completed, they are scraped off with a scraper.

[0027] The drying system includes a heating wire 18 and a blower box 19, and the dryer inlet is connected to the storage box 145.

[0028] The process for preparing magnetic porous carbon adsorbent materials using coal gangue as an example is as follows: In the storage unit, from left to right are iron(III) oxide and agate balls.

[0029] Open the powder conveying pipeline valve 2, start the powder conveying pump 4, add coal gangue and ferric oxide into the ball mill 6, add straw and coal gangue into the tubular furnace through the pipe opening, after high-temperature carbonization, open the tubular furnace valve 55, start the material conveying pump 56, add the carbonized material into the ball mill jar, open the feed inlet valve 603, start the ball mill 6, after the ball milling is completed, open the discharge pipeline valve 610, start the material conveying pump 611, and the material enters the magnetic separator 7.

[0030] After the material enters the magnetic separator 7, the gas supply valve 607 is opened, and the waste gas is discharged from the exhaust port 609 through the gas supply pipe 608. After a period of time, the inert gas valve 51 is closed.

[0031] The material enters the magnetic separator 7 through the discharge pipe 612 and the feed branch pipe 71. Water is added to the magnetic separator 7 at the beginning. The electromagnet 73 at the end of the robotic arm 72 is wrapped in plastic skin 74 and immersed in the suspension to adsorb magnetic porous carbon. After the magnetic separation is completed, the robotic arm 72 moves the electromagnet 73 to the top of the storage box 75. The power is turned off to make the electromagnet 73 lose its magnetism and the material falls into the storage box 75.

[0032] After magnetic separation is completed, open the inlet pipe valve 83, start the liquid input pump 82, and the wastewater enters the centrifuge tank 81. The automatic telescopic device 88 retracts upward and leaves the centrifuge 8. Start the centrifuge tank 81. After centrifugation, the automatic telescopic device 88 drives the outlet pipe down into the centrifuge 8. Open the outlet pipe valve 86 and start the liquid transfer pump 87. The treated liquid enters the magnetic separation box 7 through the inlet branch pipe 71 via the outlet pipe 85. After the impurities in the centrifuge 8 are prepared, they are scraped off with a scraper.

[0033] Open the main material discharge pipe valve 77, start the main material conveying pump 78, the material enters the dryer, start the dryer, and obtain magnetic porous carbon. It should be noted that the air box 10 is only opened in the early stage of drying to accelerate moisture separation. After the moisture is basically evaporated, the air box is closed.

[0034] It should be emphasized that the preparation of this experiment must be carried out in a laboratory fume hood, or the exhaust should be discharged through an exhaust pipe connected to exhaust port 609. Attention should be paid to personnel safety and waste gas treatment.

[0035] Furthermore, it should be noted that the above description only illustrates one embodiment of this application, and should not be construed as limiting the scope of this patent application. It should be pointed out that any simple modifications or equivalent variations made without departing from the scope of the technical solution of this invention are within the scope of this invention.

Claims

1. An integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw, characterized in that, It includes a carbonization system, a feeding system, a ball milling system, a magnetic separation system, a liquid circulation system, and a drying system; The carbonization system includes a tubular furnace and inert gas valves; The feeding system is connected to the outlet of the carbonization system and includes a storage unit, a micro rotary agitator, and a feeding pipe. The ball mill system is connected to the main discharge port of the feeding system and the feed port of the ball mill, and includes a ball mill jar, a conveying pipe, and an exhaust port; The magnetic separation system is connected to the ball milling system and includes a magnetic separator, an electromagnet, a storage box, a discharge branch pipe, a robotic arm, and a feed branch pipe. The liquid circulation system is connected to the magnetic separation system and includes a centrifuge, a liquid outlet conduit, an impurity bin, a centrifuge discharge pipe, and an automatic telescopic device. The drying system is connected to the magnetic separation system and includes a dryer and a feed pipe.

2. The integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, The carbonization system includes a straw supply unit; The tubular furnace is embedded with heating wires; The inert gas valve is installed at the inlet of the tubular furnace to provide an inert gas atmosphere.

3. The integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, The feeding system includes a magnetite supply unit and an agate ball supply unit; The feeding system includes a miniature rotary agitator installed in the ball mill feed hopper.

4. The integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, The main branch pipe of the feeding system and the outlet of the tubular furnace are combined into the feed inlet and feed funnel of the ball mill, which are connected to the ball mill.

5. The integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, The carbonization system includes a straw supply unit and a coal gangue supply unit, which are fed into a tubular furnace for carbonization.

6. The integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, The end of the ball mill jar is an exhaust port. A filter screen is installed at the end of the ball mill jar to block the material, allowing only exhaust gas to pass through. The lower end of the ball mill jar is connected to the magnetic separation system. After ball milling, the initial material is fed into the magnetic separation box through the discharge branch pipe.

7. The integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, In the magnetic separation system, the electromagnet is connected to the robotic arm and is wrapped in plastic to isolate it from the solution. The material enters the magnetic separation box through the discharge branch pipe, and the robotic arm can move the electromagnet above the storage box.

8. The integrated preparation device for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, The liquid circulation system's magnetic separator is connected to the centrifuge tank, the liquid outlet pipe is merged with the feed branch pipe, and the liquid delivery pipe is equipped with an automatic telescopic device. The infusion pipeline includes an inlet pipeline and an outlet pipeline, both equipped with valves and a delivery pump.

9. The integrated preparation equipment for preparing magnetic porous carbon based on coal gangue and straw according to claim 1, characterized in that, The drying system includes a drying device and an air-drying device: the drying device is divided into an inner bladder and an outer layer, with heating wires embedded in the outer layer and a fan embedded in the inner bladder wall, so that they can work together to dry the material.

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