Coal pretreatment apparatus for activated carbon production

Abstract

This utility model discloses a coal pretreatment equipment for activated carbon production, including a jaw crusher. The material output from the jaw crusher is fed to hopper a, the bottom of which is connected to a grinding mill. The discharge end of the grinding mill is connected to hopper b, and an air classifier is installed at the bottom of hopper b. The air classifier is equipped with a drying system. This coal pretreatment equipment for activated carbon production pulverizes the carbon blocks to 200 mesh and dries them simultaneously through high-temperature airflow in the air classifier. The air classifier maintains a high temperature to evaporate moisture from the material, thus achieving the drying purpose. This method allows for the pulverization of materials into small particles as needed, and simultaneous drying via air classification. The high-temperature airflow has a large contact area with the pulverized material, resulting in uniform drying and the separation of small particles, meeting process requirements. The feeding speed is continuous and efficient.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a coal pretreatment equipment for activated carbon production. Background Technology

[0002] The production process of activated carbon mainly includes steps such as raw material selection, pretreatment, carbonization, activation, and post-treatment. Pretreatment involves crushing and screening the raw materials to achieve a suitable particle size for subsequent processing. For some raw materials containing impurities, washing and drying are also required to remove moisture, dirt, and other impurities. For example, when using wood as raw material, the wood needs to be cut into small pieces and then dried to reduce its moisture content, which is beneficial for the subsequent carbonization process.

[0003] To adapt to the latest process, carbon blocks are used as raw materials for activation. However, the pretreatment of the raw materials requires a 200-mesh crushing process. Currently, 200-mesh crushing is done in the post-treatment steps of activated carbon. Most pretreatment is done by using a jaw crusher to crush the carbon to a particle size of 20-100 mesh. Therefore, the pretreatment cannot meet the 200-mesh crushing requirement. Moreover, the particle size directly affects the activation efficiency and has certain requirements for its dryness. Therefore, this application proposes to improve the existing pretreatment equipment to better adapt to the activation process. Utility Model Content

[0004] The purpose of this invention is to provide a coal pretreatment device for activated carbon production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A coal pretreatment equipment for activated carbon production includes a jaw crusher. The material output from the jaw crusher is fed to hopper a. The bottom of hopper a is connected to a grinding mill. The discharge end of the grinding mill is connected to hopper b. An air classifier is installed at the bottom of hopper b. The air classifier is equipped with a drying system. Small particles separated by the air classifier enter a screening device. Large particles screened by the air classifier and the screening device are fed back into hopper a.

[0007] The air classifier includes an air classifier box, a large particle chamber, a small particle chamber, a sliding plate, and air outlets. The air classifier box is equipped with a sliding plate, a large particle chamber, and a small particle chamber. The sliding plate is located above the large particle chamber and the small particle chamber, and the air outlets are arranged horizontally in a row on the sliding plate.

[0008] The drying system includes a fan a, an air heater, a distribution pipe, and control valves. The air outlet of the fan a is connected to the air heater, the air outlet of the air heater is connected to the distribution pipe, and the distribution pipe is connected to the air outlet through multiple control valves.

[0009] As a further embodiment of this utility model: the large particle chamber and the small particle chamber are interconnected. The material slides down to the air outlet through the sliding plate. Under the action of gravity, air resistance and inertial force, the small particles are blown into the small particle chamber, and the large particles fall into the large particle chamber.

[0010] As a further improvement of this utility model: the bottom of the large particle chamber and the small particle chamber are respectively provided with a discharge valve. The large particle material output from the large particle chamber through the discharge valve is sent into hopper a, and the small particle material output from the small particle chamber through the discharge valve is sent into the screening device.

[0011] As a further improvement of this utility model, the material sliding plate is provided with staggered material distribution columns.

[0012] As a further improvement of this utility model: an exchange filtration system is provided on the top of the air separation device;

[0013] The exchange filtration system includes two mesh cages, filter bags, negative pressure pipelines, and switching valves. At least two mesh cages are installed on the top of the small particle chamber. Filter bags are fitted around the outside of the mesh cages. The two mesh cages are connected to the negative pressure pipelines, and switching valves are installed on the two negative pressure pipelines. The switching valves are connected to the fan b.

[0014] As a further improvement of this utility model: each of the two negative pressure pipelines is provided with an air inlet pipeline, and each of the two air inlet pipelines is provided with an air inlet valve.

[0015] As a further improvement of this utility model: the fan b is also connected to the exhaust end of the grinding mill, and the output end of the fan b is connected to a bag filter.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This activated carbon production coal pretreatment equipment pulverizes carbon blocks to 200 mesh, and dries them simultaneously through high-temperature airflow in an air classifier. The air classifier maintains a high temperature to evaporate moisture from the material, achieving the desired drying effect. This method allows for the pulverization of materials into small particles as needed, with simultaneous drying via air classification. The high-temperature airflow has a large contact area with the pulverized material, resulting in uniform drying and the separation of small particles, meeting process requirements. The feeding speed is continuous and efficient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a coal pretreatment equipment for activated carbon production.

[0019] Figure 2 This is a schematic diagram of the diversion pipe in a coal pretreatment device for activated carbon production.

[0020] Figure 3 This is a schematic diagram of the air separation device in a coal pretreatment equipment for activated carbon production.

[0021] In the diagram: 1. Jaw crusher; 2. Hopper a; 3. Grinding mill; 4. Hopper b; 5. Air classifier; 501. Air classifier box; 502. Large particle chamber; 503. Small particle chamber; 504. Sliding plate; 505. Distributor column; 506. Air outlet; 507. Discharge valve; 6. Filtration system; 601. Wire mesh cage; 602. Filter bag; 603. Air inlet pipeline; 604. Air inlet valve; 605. Switching valve; 606. Negative pressure pipeline; 7. Fan b; 8. Baghouse dust collector; 9. High-temperature air inlet; 10. Diverter pipe; 11. Air heater; 12. Fan a; 13. Control valve; 14. Screening device. Detailed Implementation

[0022] Please see Figures 1-3 In this embodiment of the present invention, a coal pretreatment equipment for activated carbon production includes a jaw crusher 1. The material output from the jaw crusher 1 is fed to a hopper a2. The bottom of the hopper a2 is connected to a grinding mill 3. The discharge end of the grinding mill 3 is connected to a hopper b4. An air classifier 5 is provided at the bottom of the hopper b4. The air classifier 5 is equipped with a drying system. Small particles separated by the air classifier 5 enter a screening device 14. Large particles screened by the air classifier 5 and the screening device 14 are fed back into the hopper a2. The grinding mill 3 is a European-style grinding mill, which is existing technology. The motor drives the main shaft to rotate through the reducer. The sprite frame installed on the main shaft rotates accordingly. The grinding rollers are in close contact with the grinding ring under the action of centrifugal force, and at the same time rotate around their own axis. The shovel scoops up the material and sends it between the grinding roller and the grinding ring. Under the crushing and grinding action of the grinding roller, the material is crushed. In this application, the process is adjusted so that after the carbon blocks are crushed, they enter the air classifier 5 and their particle size becomes smaller. Therefore, during the air classifier process, they can be dried more effectively under the action of hot air, thereby achieving the effect of crushing and drying.

[0023] The air classifier 5 includes an air classifier box 501, a large particle chamber 502, a small particle chamber 503, a sliding plate 504, and an air outlet 506. The air classifier box 501 is equipped with a sliding plate 504, a large particle chamber 502, and a small particle chamber 503. The sliding plate 504 is located above the large particle chamber 502 and the small particle chamber 503. The air outlet 506 is arranged horizontally in a row on the sliding plate 504. The air classifier 5 is a device that uses the principle of aerodynamics to separate and screen different materials.

[0024] The drying system includes a fan a12, an air heater 11, a distribution pipe 10, and control valves 13. The air outlet of the fan a12 is connected to the air heater 11, and the air outlet of the air heater 11 is connected to the distribution pipe 10. The distribution pipe 10 is connected to the air outlet 506 through multiple control valves 13. The fan a12 of the air separator 5 is technically modified by adding an air heater 11 through a pipe in its middle section. The air heater 11 mainly utilizes electrical energy or other energy sources to convert into heat energy, and transfers the heat to the air through heating elements, raising the air temperature to 80-95℃, with the specific temperature depending on the actual situation. The degree of dryness is adjusted. High-temperature air is sent to each air outlet 506 through the diversion pipe 10. The high-temperature air enters the diversion pipe 10 through the high-temperature air inlet 9. The high-temperature air blows out to dry and air classify the material. At the same time, the air classifier 5 is kept at a high temperature to evaporate the moisture on the material, thereby achieving the purpose of drying. This method can crush the material into small particles as needed and dry the material at the same time by air classification. The high-temperature airflow has a large contact area with the crushed material, resulting in uniform drying and separation of small particles to meet the process requirements. The feeding speed is continuous and efficient.

[0025] In a preferred embodiment, the large particle chamber 502 and the small particle chamber 503 are interconnected. The material slides down the sliding plate 504 to the air outlet 506. Under the action of gravity, air resistance and inertial force, the small particles are blown into the small particle chamber 503, and the large particles fall into the large particle chamber 502. The bottom of the large particle chamber 502 and the small particle chamber 503 are respectively provided with a discharge valve 507. The large particles output from the large particle chamber 502 through the discharge valve 507 are sent into the hopper a2, and the small particles output from the small particle chamber 503 through the discharge valve 507 are sent into the screening device 14. The discharge valve 507 controls the discharge speed. If the output carbon block particles have too high a moisture content, the discharge speed can be controlled by controlling the temperature of the air heater 11 and the discharge speed can be controlled at the same time to slow down the discharge speed. The material can stay in the air classifier 5 for a longer time to be evaporated and dried by high temperature air.

[0026] In a preferred embodiment, the sliding plate 504 is provided with staggered distribution columns 505. The bottom of the hopper a2 is fed through the feeding valve, which leads to uneven distribution and stacking of materials. Although the sliding process plays a certain role in separation, if the feeding is too fast, it will still affect air classification and drying. Therefore, the staggered distribution columns 505 are set so that the material is separated multiple times when passing through the gaps between the distribution columns 505, which achieves the effect of material distribution.

[0027] In a preferred embodiment, an exchange filtration system 6 is provided on the top of the air separation device 5;

[0028] The exchange filtration system 6 includes two mesh cages 601, filter bags 602, negative pressure pipelines 606, and switching valves 605. At least two mesh cages 601 are installed on the top of the small particle chamber 503. Filter bags 602 are fitted around the outside of each mesh cage 601. The two mesh cages 601 are connected to the negative pressure pipelines 606, and switching valves 605 are installed on each of the two negative pressure pipelines 606. The switching valves 605 are connected to the fan b7. High-temperature air enters the air separator 5 and is then discharged through the exchange filtration system 6, which has two functions: one... The first purpose is to achieve a filtering effect, preventing the airflow from sending small particles into the exchange filtration system 6 for discharge. The second purpose is to guide the airflow out, preventing the air pressure inside the air separator 5 from increasing and affecting the air separation effect, and ensuring the fluidity of the airflow. Since the filtration is done by a bag filter, dust in the airflow can cause the bag filter to become clogged, affecting the filtration efficiency. Therefore, two sets are set up. When one set stops, the dust and blockages attracted by the airflow will fall off under the action of gravity. The switching pipeline is controlled by switching valve 605 to switch the pipeline and control the switching of the two sets of negative pressure pipelines 606.

[0029] In a preferred embodiment, two negative pressure pipelines 606 are respectively provided with air inlet pipelines 603, and air inlet valves 604 are respectively installed on the two air inlet pipelines 603. When one set of negative pressure pipelines 606 is vacuuming, the switching valve 605 configured in the other set is closed, and at the same time, the air inlet valve 604 of the air inlet pipeline 603 configured in that set is opened, and the outside airflow enters through the filter bag 602, causing the blockage in the filter bag 602 to fall off.

[0030] In a preferred embodiment, the blower b7 is also connected to the exhaust end of the mill 3, and the output end of the blower b7 is connected to a bag filter 8, which further purifies the gas to prevent carbon powder from being discharged and lost.

[0031] It should be noted that all the above embodiments belong to the same utility model concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not detailed, please refer to the description in other embodiments.

[0032] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A coal pretreatment device for activated carbon production, comprising a jaw crusher (1), characterized in that, The material output from the jaw crusher (1) is sent to hopper a (2). The bottom of hopper a (2) is connected to the mill (3). The discharge end of the mill (3) is connected to hopper b (4). The bottom of hopper b (4) is equipped with an air classifier (5). The air classifier (5) is equipped with a drying system. The small particles separated by the air classifier (5) enter the screening device (14). The large particles screened by the air classifier (5) and the screening device (14) are sent to hopper a (2). The air classifier (5) includes an air classifier box (501), a large particle chamber (502), a small particle chamber (503), a sliding plate (504), and an air outlet (506). The air classifier box (501) is equipped with a sliding plate (504), a large particle chamber (502), and a small particle chamber (503). The sliding plate (504) is located above the large particle chamber (502) and the small particle chamber (503). The air outlet (506) is arranged horizontally in a straight line on the sliding plate (504). The drying system includes a fan a (12), an air heater (11), a diversion pipe (10), and control valves (13). The air outlet of the fan a (12) is connected to the air heater (11), and the air outlet of the air heater (11) is connected to the diversion pipe (10). The diversion pipe (10) is connected to the air outlet (506) through multiple control valves (13).

2. The activated carbon production coal pretreatment equipment according to claim 1, characterized in that, The large particle chamber (502) and the small particle chamber (503) are interconnected. The material slides down to the air outlet (506) through the sliding plate (504). Under the action of gravity, air resistance and inertial force, the small particles are blown to the small particle chamber (503) and the large particles fall into the large particle chamber (502).

3. The activated carbon production coal pretreatment equipment according to claim 2, characterized in that, The bottom of the large particle chamber (502) and the small particle chamber (503) are respectively provided with a discharge valve (507). The large particle material output from the large particle chamber (502) through the discharge valve (507) is sent into the hopper a (2), and the small particle material output from the small particle chamber (503) through the discharge valve (507) is sent into the screening device (14).

4. The activated carbon production coal pretreatment equipment according to claim 2, characterized in that, The material distribution plate (504) is provided with staggered material distribution columns (505).

5. A coal pretreatment device for activated carbon production according to any one of claims 1-4, characterized in that, The top of the air separation device (5) is equipped with an exchange filtration system (6). The exchange filtration system (6) includes two mesh cages (601), filter bags (602), negative pressure pipelines (606) and switching valves (605). At least two mesh cages (601) are installed on the top of the small particle chamber (503). Filter bags (602) are fitted on the outside of the mesh cages (601). The two mesh cages (601) are respectively connected to the negative pressure pipelines (606). Switching valves (605) are respectively installed on the two negative pressure pipelines (606). The switching valves (605) are connected to the fan b (7).

6. The activated carbon production coal pretreatment equipment according to claim 5, characterized in that, The two negative pressure pipelines (606) are respectively provided with air inlet pipelines (603), and air inlet valves (604) are respectively installed on the two air inlet pipelines (603).

7. The activated carbon production coal pretreatment equipment according to claim 5, characterized in that, The blower b (7) is also connected to the exhaust end of the mill (3), and the output end of the blower b (7) is connected to a bag filter (8).

Images