Premixing type raw material continuous treatment system for preparing activated carbon

Abstract

The invention relates to a premixing type raw material continuous treatment system for preparing activated carbon. The system comprises a pulverized coal bunker, a binder bunker, a buffer water tank, a premixing blanking device, a continuous mixing device, a screw conveyer and a granulator. And a discharge port of the pulverized coal bin and a discharge port of the binder bin are respectively connected to a feed port of the premixing blanking device. And a discharge port of the premixing and blanking device is connected to a feed port of the continuous mixing device. A water outlet of the buffer water tank is connected to a water inlet of the continuous mixing device. The discharge port of the continuous mixing device is connected with the feed end of the screw conveyer, and the discharge end of the screw conveyer is connected with the feed port of the granulator. According to the invention, continuous treatment of raw materials can be realized, so that continuous preparation of activated carbon is realized, and the yield and quality of activated carbon production are improved; and by arranging the premixing and discharging device, water vapor generated in the stirring process of the continuous mixing device can be isolated, the problem that the binder absorbs water and is hardened to block a material channel due to upward flowing of the water vapor is avoided, and the mixing degree of the pulverized coal and the binder is improved.

Description

Technical Field

[0001] This invention relates to a raw material processing system, specifically a premixed raw material continuous processing system for the preparation of activated carbon, belonging to the fields of activated carbon preparation and environmental protection. Background Technology

[0002] In recent years, with the implementation of China's environmental protection policies, the activated carbon industry used for flue gas purification has developed rapidly. The domestic demand for activated carbon will continue to grow, the activated carbon industry is developing rapidly, and activated carbon production equipment is also being continuously improved and innovated.

[0003] Large particle activated carbon preparation process such as Figure 5 As shown, raw coal is crushed and ground to produce coal powder of a certain particle size. A certain proportion of binder and water are added and mixed, then granulated into activated carbon particles of the desired size using a granulation device. The activated carbon particles are then obtained through two processes: carbonization and activation. Currently, the main equipment for mixing large-particle activated carbon raw materials is an intermittent double-roller kneading device.

[0004] In existing technologies, the activated carbon raw material mixing process is referred to as kneading operation due to the name and characteristics of the processing equipment. When existing kneading (mixing) equipment is in operation, all the coal powder raw materials are first added to the equipment, then a binder is added and kneaded for a period of time, followed by water and kneading until completion. The material is then discharged through the discharge port to proceed to the next process. This feeding and mixing method results in poor mixing of the components and low throughput. The more material added at once, the more difficult it is to evenly disperse the material, thus hindering large-scale production. Kneading equipment operates intermittently, processing 400-500 kg at a time. A curved double-roller rotor rotates slowly in opposite directions, mixing the various materials through the tumbling and kneading of the material. The roller speed is typically 10-20 rpm, the kneading time is 8-12 minutes, and the single-unit processing capacity is 3-3.5 t / h. To meet production demands, multiple kneaders are generally configured for operation, increasing maintenance difficulty, requiring more operators, and increasing the floor space required. On the other hand, there are many kneading devices, and each device needs to be equipped with a raw material addition system. Due to the influence of raw materials and equipment factors, the kneading effect of multiple systems is inconsistent. At the same time, it is also affected by factors such as different personnel operation, which can easily cause unstable mixed granulation quality and affect the stability of the final product.

[0005] In the original production process, first open the lower end valve of the coal powder bin, and introduce raw coal powder into the metering bin. The metering bin has a weighing function. When the weight of the coal powder in the metering bin reaches 350-400 kg, the valve is closed to stop the coal feeding. The lower end valve of the metering bin is opened to feed a certain amount of coal powder into the kneader. Then the lower end valve of the binder bin is opened to feed a certain amount of binder into the kneader. The binder bin has a weighing function. The weight of the binder discharged is determined by real-time weighing. When the weight reaches a certain value, the valve is immediately closed to achieve quantitative addition of the binder. In addition, water is added quantitatively by an electromagnetic valve cooperating with a flowmeter. After the kneader is stirred, the discharge door is opened to discharge the material. After emptying, the discharge door is closed. This cycle realizes production. Each time the valve is opened and closed and weighed, there is a certain error, which causes the ratio of each material stirring to be inconsistent, affecting the stability of the product.

[0006] In the existing kneading equipment, intermittent operation cannot realize large-scale production, and multiple material stirring causes inconsistent product stability. Therefore, the application proposes a continuous activated carbon preparation method for raw material continuous treatment to improve the processing capacity, thereby improving the yield and quality of activated carbon production. However, directly changing the existing activated carbon preparation process to a continuous production process with continuous raw material feeding has the following technical problems: In the existing activated carbon preparation process, coal powder, binder (solid binder), and water are often directly added into the kneader for mixing. A large amount of water is added during the kneading process. On the one hand, due to the overheating of the weather and the heat generated by the friction during the kneading process, a certain amount of water vapor is evaporated. When the kneading equipment adopts continuous production mode and the raw material is continuously fed into the kneading equipment, the evaporated water vapor will flow into the binder conveying channel. Since the binder has high water absorption, the water vapor entering the binder conveying channel is easily absorbed by the binder, causing the binder to harden and the binder conveying channel to be blocked, affecting the continuous feeding of the binder and the continuous production of activated carbon. On the other hand, as mentioned above, the binder is easily contacted with water and quickly absorbs water to form a group, which affects the uniform mixing of each component in the mixing process and causes unstable granulation quality, thereby affecting the performance of the final activated carbon product. SUMMARY

[0007] In view of the above problems in the prior art, the application provides a premixed raw material continuous treatment system for preparing activated carbon.

[0008] In the technical scheme, the coal powder and the binder are firstly mixed in the premixing and discharging device, and the premixed raw material is mixed with water in the continuous mixing device again.

[0009] According to the embodiment of the application, a premixed raw material continuous treatment system for preparing activated carbon is provided.

[0010] The premixed raw material continuous treatment system for preparing activated carbon comprises a coal powder bin, a binder bin, a buffer water tank, a premixing and discharging device, a continuous mixing device, a screw conveyor and a granulator.

[0011] In the present application, the premixing and dosing device comprises a housing, a rotating shaft, a transmission mechanism, a driving mechanism, and paddles. The housing has a multi-diameter structure along the axial direction. The feeding port and the discharging port of the premixing and dosing device are arranged at the top and the bottom of the housing, respectively. The rotating shaft is arranged on the central axis of the housing and located between the top and the bottom of the housing. The rotating shaft is connected with the transmission mechanism. The driving shaft of the transmission mechanism extends out of the housing and is connected with the driving mechanism arranged outside the housing. The rotating shaft is provided with paddles.

[0012] In the present application, the rotating shaft is provided with multiple paddles. Preferably, the multiple paddles are arranged in multiple groups in the axial direction.

[0013] As a preferred, the housing has a multi-layer hourglass structure along the axial direction. Preferably, a group of paddles is arranged at each diameter transition region of the housing.

[0014] In the present application, the paddle located at the diameter transition region in each group of paddles has the longest length. Preferably, the length of each paddle in each group of paddles decreases from the diameter transition region to both sides.

[0015] In the present application, the multiple paddles in each group of paddles are arranged in a spiral along the axial direction.

[0016] In the present application, the premixing and dosing device further comprises a support arranged in the housing. The support comprises radial supports and annular supports. The radial supports are arranged between the rotating shaft and the inner wall of the housing. The annular supports are arranged in contact with the inner wall of the housing.

[0017] As a preferred, multiple radial supports and annular supports are arranged along the axial direction in the housing. The radial supports are arranged at the protruding positions of the inner diameter of the housing, and the annular supports are arranged at the recessed positions of the inner diameter of the housing. The arrangement of the radial supports and the annular supports can effectively ensure the stability of the components in the premixing and dosing device.

[0018] In the present application, the premixing and dosing device further comprises a bearing seat and a bearing. The bearing seat is arranged on the central axis in the housing and fixedly connected with the housing (or the bearing seat is fixedly connected with the housing through a support). The bearing is installed in the bearing seat. The rotating shaft is arranged on the central axis in the housing through the bearing.

[0019] In the present application, the system further comprises a first weighing and conveying device arranged between the coal powder bin and the premixing and dosing device. The discharging port of the coal powder bin is connected with the feeding end of the first weighing and conveying device, and the discharging end of the first weighing and conveying device is connected to the feeding port of the premixing and dosing device through a coal powder conveying pipe.

[0020] Preferably, a buffer chamber is also provided between the pulverized coal silo and the first weighing and conveying device. The outlet of the pulverized coal silo is connected to the inlet of the buffer chamber. The outlet of the buffer chamber is connected to the inlet of the first weighing and conveying device. Preferably, a venting pipe is also provided between the buffer chamber and the continuous mixing device.

[0021] In this invention, the system further includes a second weighing and conveying device disposed between the binder silo and the premixing feeding device. The outlet of the binder silo is connected to the inlet of the second weighing and conveying device, and the outlet of the second weighing and conveying device is connected to the inlet of the premixing feeding device via a binder conveying pipe. Preferably, the binder conveying pipe is merged into the pulverized coal conveying pipe.

[0022] In this invention, the outlet of the buffer tank is connected to the inlet of the continuous mixing device via a water supply pipe. A volumetric pump and a flow meter are installed on the water supply pipe.

[0023] In this invention, discharge valves are respectively provided at the outlets of the pulverized coal silo, binder silo, and buffer silo. Preferably, the discharge valves are volumetric discharge valves.

[0024] In this invention, a level sensor is installed inside the pulverized coal silo. A liquid level detection device is installed inside the buffer water tank.

[0025] In this invention, a mixing silo and a discharge hopper are provided between the continuous mixing device and the screw conveyor. The discharge port of the continuous mixing device is connected to the inlet of the mixing silo. The discharge port of the mixing silo is connected to the inlet of the discharge hopper. The discharge port of the discharge hopper is connected to the inlet of the screw conveyor.

[0026] Preferably, multiple feeding hoppers are provided below the mixing silo. These feeding hoppers are arranged in a ring or evenly distributed along the circumference below the mixing silo. Each feeding hopper is equipped with a screw conveyor and a pelletizer below it.

[0027] In this invention, the system also includes a main conveyor belt disposed downstream of the pellet mills. The plurality of pellet mills are each connected to the main conveyor belt via their respective auxiliary belts.

[0028] Preferably, the plurality of pellet mills are arranged at staggered intervals around the main conveyor belt. More preferably, the plurality of pellet mills are arranged in a swastika or similar shape.

[0029] In this invention, the granulator is a flat die granulator or a ring die granulator, preferably a ring die granulator.

[0030] The application provides a premixing raw material continuous processing system for preparing activated carbon, which comprises a coal powder bin, a binder bin, a buffer water tank, a premixing and discharging device, a continuous mixing device, a screw conveyor and a granulator.

[0031] In the technical scheme, the coal powder and the binder are firstly mixed in the premixing and discharging device, and the premixed raw material is mixed with water in the continuous mixing device again. In the continuous preparation process of the activated carbon, the premixing and discharging device can isolate the water vapor generated in the stirring process of the continuous mixing device, so that the water vapor is prevented from flowing upwards into the binder conveying channel. In addition, the premixing and discharging device has a stirring function, so that even if the water vapor flows upwards into the premixing and discharging device, the material in the device is not easy to be hardened, thereby preventing the blocking of the material channel and the uneven fusion of the components caused by the agglomeration of the binder in the prior art.

[0032] In the application, the premixing and discharging device comprises a shell, a rotating shaft arranged on the axis of the shell, a paddle arranged on the rotating shaft, a driving mechanism and a transmission mechanism for driving the rotating shaft to rotate the paddle. The shell of the premixing and discharging device is a multiple variable-diameter structure along the axis direction, and the rotating shaft can drive the paddle to rotate and stir. Therefore, the material entering the premixing and discharging device is subjected to not only the shearing action of the paddle, but also the overturning diffusion action caused by the change of the diameter of the material channel, which greatly improves the premixing capacity of the device and the mixing uniformity of the coal powder and the binder, and is beneficial to the uniform fusion of the components in the subsequent mixing and granulation process.

[0033] It should be noted that the shell of the premixing and dosing device in the present application is a multiple-diameter structure in the axial direction, that is, the diameter of the shell changes in the axial direction, and the diameter of the shell is set to change in multiple ways; here, the multiple ways means that the diameter of the shell does not change only at a certain position, nor does it always increase or decrease along a certain rule, but the diameter of the shell changes at multiple positions in the axial direction, and the change rule also changes once or more times, that is, there is one or more turning points in the process of changing the diameter of the shell (for example, from the feed inlet to the discharge outlet in the axial direction, the diameter of the shell suddenly decreases after increasing, or the diameter of the shell suddenly increases after decreasing, or the diameter of the shell continues to decrease according to another rule after decreasing along a certain rule, or the diameter of the shell continues to increase according to another rule after increasing along a certain rule, etc., or the diameter of the shell changes according to the cycle of the foregoing rules), so that the material in the premixing and dosing device can form a turnover diffusion effect due to the change of the diameter of the shell, thereby improving the premixing capacity of the device.

[0034] The present application provides a plurality of blades on the rotating shaft. The driving mechanism drives the transmission mechanism to rotate the rotating shaft, and the rotating shaft drives the blades to rotate, thereby realizing the stirring effect of the blades. The driving mechanism and the transmission mechanism are not limited, and can provide driving force for the rotation of the rotating shaft, for example, the driving mechanism can be a driving motor, and the transmission mechanism can be a worm gear transmission mechanism.

[0035] As a preferred solution, the plurality of blades are divided into multiple groups and arranged in the axial direction of the premixing and dosing device. The grouping and arrangement of the plurality of blades are adapted to the multiple-diameter change of the shell, that is, a group of blades is arranged in the turning region of the diameter change of the shell, that is, the rotating and stirring effect of the blades and the turnover diffusion effect caused by the diameter change of the shell are mutually coordinated, thereby further improving the premixing capacity of the device. Further preferably, the shell of the premixing and dosing device in the present application is a multi-layered hourglass structure in the axial direction, as shown in Figure 2 Each group of blades is arranged in the protruding position and the recessed position of the multi-layered hourglass. In order to maximize the coordination between the rotating and stirring effect of the blades and the turnover diffusion effect caused by the diameter change of the shell, the length of the blades located in the diameter change turning position in each group of blades is the longest, and the length of each blade decreases from the diameter change turning position to both sides, and the plurality of blades in each group of blades are arranged in a spiral along the axis.

[0036] The first weighing conveying device or the second weighing conveying device can continuously weigh the materials entering the device, so that the input amount of the coal powder or the binder in the continuous feeding process can be monitored and feedback controlled in real time, thereby ensuring that the ratio of each material in the continuously prepared activated carbon is consistent, which is conducive to ensuring the stability of the product. Further, the discharge outlets of the coal powder bin and the binder bin are respectively provided with discharge valves (such as volumetric discharge valves), and the discharge valves can be adjusted to realize real-time regulation of the feeding speed of the coal powder or the binder in the continuous feeding process, thereby realizing regulation of the material feeding amount. Correspondingly, the buffer water tank is connected with the water inlet of the continuous mixing device through a water conveying pipeline, a volumetric pump and a flowmeter are arranged on the water conveying pipeline, the rotation speed of the volumetric pump can be adjusted to realize real-time regulation of the water conveying speed, and the flowmeter can monitor and feedback regulate the real-time water conveying amount. Among them, the volumetric pump can be a gear pump or a reciprocating pump, the volumetric pump is driven by frequency conversion speed regulation, and the flow data is fed back by the flowmeter to adjust the driving frequency of the volumetric pump, so as to control the water flow.

[0037] Generally, the bulk coal is ground into coal powder, and the coal powder is conveyed to the coal powder bin by gas force. The gas force conveying will generate a certain gas pressure in the coal powder bin. When the coal powder in the coal powder bin is less, the gas pressure will affect the discharge of the lower end of the coal powder bin, so that the feeding of the coal powder is extremely unstable. In order to reduce the situation that the low material level of the coal powder bin causes unstable material flow due to gas pressure, the application adds a buffer bin between the coal powder bin and the first weighing conveying device, and isolates the gas pressure of the coal powder bin through the buffer bin. The discharge outlet of the buffer bin is also provided with a discharge valve (such as a volumetric discharge valve). In order to further improve the influence of gas pressure, the application also provides an air pipe connecting the buffer bin and the continuous mixing equipment.

[0038] As a preferred, the coal powder bin is provided with a material level sensor, including an upper limit sensor and a lower limit sensor. The buffer water tank is provided with a liquid level detection device, which can automatically open or close the water injection according to the liquid level, so as to make the water pressure as stable as possible, so as to ensure that the water can be added stably. Correspondingly, the binder bin is a weighing bin, which can open or close the addition of the binder to the binder bin by weighing the weight of the bin.

[0039] The application is provided with a mixing bin at the lower end of the discharge port of the continuous mixing device, and the lower end of the mixing bin is provided with multiple point discharge hoppers, each of which is connected to a screw conveyor, and each screw conveyor delivers the material to a matched granulator for granulation.

[0040] As shown in Figure 4 The downstream of the granulator is also provided with a main conveying belt, and the multiple granulators are connected to the main conveying belt through respective auxiliary belts. Among them, the multiple granulators are arranged in a staggered manner around the main conveying belt, preferably, the multiple granulators are arranged in a shape or similar shape, on the one hand, the space can be utilized as much as possible, on the other hand, the spacing between the granulators can be larger, ensuring the maintenance space of each device; at the same time, the activated carbon granules can be uniformly dropped into the same main conveying belt for conveying. Figure 4 As shown in

[0041] The application is based on the device that can realize continuous stirring, wherein the continuous mixing device can be the patent of the applicant (CN111530570A) or other continuous mixing devices.

[0042] In the application, the height of the coal powder bin is 0.1-50m, preferably 0.2-30m, more preferably 0.3-20m, and further preferably 0.5-10m. The height of the premixing and discharging device is 0.1-20m, preferably 0.2-10m, more preferably 0.3-8m, and further preferably 0.5-5m.

[0043] In the application, "binder", "adhesive" and "adhesive" have the same meaning and can be interchangeable.

[0044] Compared with the prior art, the application has the following beneficial technical effects: 1. The premixing type raw material continuous treatment system for preparing activated carbon can realize continuous treatment of raw materials, thereby enabling continuous preparation of activated carbon, effectively solving the problems of intermittent operation in the prior art, which cannot realize large-scale production of activated carbon and inconsistent product stability caused by multiple material mixing and proportioning, and improving the yield and quality of activated carbon production.

[0045] 2. In the continuous preparation process of activated carbon, the premixing feeding device in this invention can isolate the water vapor generated during the stirring process of the continuous mixing device, and prevent water vapor from flowing upward into the binder conveying channel. Moreover, the premixing feeding device has a stirring effect, so even if water vapor flows upward into the premixing feeding device, the material is not easy to clump inside the device, thereby avoiding the blockage of the material channel and avoiding the problem of uneven fusion of various components caused by the binder absorbing water and clumping together in the prior art.

[0046] 3. In this invention, the shell of the premix feeding device has a multi-diameter variable structure along the axial direction. The rotating shaft can drive the blades to rotate and stir. Therefore, the material entering the premix feeding device is not only subjected to the shearing action of the blades, but also to the tumbling and diffusion effect caused by the change in the diameter of the shell, i.e. the material channel. This greatly enhances the premixing capacity of the device and improves the mixing uniformity of coal powder and binder.

[0047] 4. The present invention arranges multiple blades on the rotating shaft in groups, and the group arrangement is adapted to the multiple diameter changes of the shell. That is, a group of blades is set in the turning area where the diameter of the shell changes, so that the rotation and stirring effect of the blades and the tumbling and diffusion effect brought about by the diameter change of the shell work together to further improve the premixing capability of the device.

[0048] 5. In this invention, the shell of the premixed feeding device is preferably a multi-layer hourglass structure along the axial direction. A set of blades is set in each section of the diameter-changing transition area of ​​the shell, that is, a set of blades is set in each of the protruding and concave positions of the multi-layer hourglass. The blades located at the diameter-changing transition position in each set of blades are the longest. The length of each blade decreases from the diameter-changing transition position to both sides, so as to maximize the synergistic effect between the rotational stirring effect of the blades and the tumbling and diffusion effect brought about by the diameter change of the shell.

[0049] 6. In this invention, multiple granulators are arranged in a swastika or similar shape. On the one hand, this can make full use of space to arrange the equipment, and on the other hand, it can make the interval between the granulators larger, ensuring maintenance space for each piece of equipment. At the same time, it can realize that the activated carbon granules fall into the same main conveyor belt for conveying, reducing the need for secondary belt conveying equipment. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of a premixed raw material continuous processing system for preparing activated carbon according to the present invention; Figure 2 This is a schematic diagram of the premixed feeding device in this invention; Figure 3 This is a top view of the premixing feeding device in this invention; Figure 4 This is a schematic diagram showing the arrangement of multiple granulators in this invention; Figure 5A process flow chart for preparing large-particle activated carbon.

[0051] Reference signs: 1: coal powder bin; 2: binder bin; 3: buffer water tank; 4: premixing and dosing device; 401: shell; 402: rotating shaft; 403: transmission mechanism; 404: driving mechanism; 405: paddle; 406: support; 40601: radial support; 40602: annular support; 407: bearing seat; 408: bearing; 5: continuous mixing device; 6: screw conveyor; 7: granulator; 701: auxiliary belt; 801: first weighing and conveying device; 802: second weighing and conveying device; 9: buffer bin; 10: volumetric pump; 11: flow meter; 12: discharge valve; 13: mixing material bin; 14: dosing hopper; 15: main conveying belt; L1: coal powder conveying pipe; L2: binder conveying pipe; L3: water conveying pipe; L4: air conveying pipe. DETAILED DESCRIPTION

[0052] The technical solutions of the present application are illustrated below, and the scope of protection requested by the present application includes but is not limited to the following embodiments.

[0053] According to an embodiment of the present application, a continuous processing system for premixing raw materials for preparing activated carbon is provided.

[0054] A continuous processing system for premixing raw materials for preparing activated carbon, comprising a coal powder bin 1, a binder bin 2, a buffer water tank 3, a premixing and dosing device 4, a continuous mixing device 5, a screw conveyor 6, and a granulator 7. The discharge outlet of the coal powder bin 1 and the discharge outlet of the binder bin 2 are respectively connected to the feeding inlets of the premixing and dosing device 4. The discharge outlet of the premixing and dosing device 4 is connected to the feeding inlet of the continuous mixing device 5. The water outlet of the buffer water tank 3 is connected to the water inlet of the continuous mixing device 5. The discharge outlet of the continuous mixing device 5 is connected to the feeding end of the screw conveyor 6, and the discharge end of the screw conveyor 6 is connected to the feeding inlet of the granulator 7.

[0055] In the present application, the premixing and dosing device 4 comprises a shell 401, a rotating shaft 402, a transmission mechanism 403, a driving mechanism 404, and a paddle 405. The shell 401 is a multiple-diameter structure along the axial direction. The feeding inlet and the discharge outlet of the premixing and dosing device 4 are respectively arranged at the top and the bottom of the shell 401. The rotating shaft 402 is arranged on the central axis of the shell 401 and located between the top and the bottom of the shell 401. The transmission mechanism 403 is connected to the rotating shaft 402. The driving shaft of the transmission mechanism 403 extends out of the shell 401 and is connected to the driving mechanism 404 arranged outside the shell 401. The paddle 405 is arranged on the rotating shaft 402.

[0056] In the present application, the rotating shaft 402 is provided with a plurality of blades 405. Preferably, the plurality of blades 405 are arranged in groups in the axial direction.

[0057] Preferably, the shell 401 is a multi-layered hourglass structure in the axial direction. Preferably, each group of blades is arranged at a variable-diameter transition region of the shell 401.

[0058] In the present application, the blade 405 at the variable-diameter transition position in each group of blades is the longest. Preferably, the length of each blade 405 in each group of blades decreases from the variable-diameter transition position to both sides.

[0059] In the present application, the plurality of blades 405 in each group of blades are arranged in a spiral in the axial direction.

[0060] In the present application, the premixing and dosing device 4 further comprises a support 406 arranged in the shell 401. The support 406 comprises a radial support 40601 and an annular support 40602. The radial support 40601 is arranged between the rotating shaft 402 and the inner wall of the shell 401. The annular support 40602 is arranged in contact with the inner wall of the shell 401.

[0061] Preferably, a plurality of radial supports 40601 and annular supports 40602 are arranged in the shell 401 in the axial direction. The radial supports 40601 are arranged at the protruding positions of the inner diameter of the shell 401, and the annular supports 40602 are arranged at the recessed positions of the inner diameter of the shell 401.

[0062] In the present application, the premixing and dosing device 4 further comprises a bearing seat 407 and a bearing 408. The bearing seat 407 is arranged on the central axis of the shell 401 and is fixedly connected to the shell 401. The bearing 408 is installed in the bearing seat 407. The rotating shaft 402 is arranged at the central axis of the shell 401 through the bearing 408.

[0063] In the present application, the system further comprises a first weighing and conveying device 801 arranged between the coal powder bin 1 and the premixing and dosing device 4. The discharge port of the coal powder bin 1 is connected to the feeding end of the first weighing and conveying device 801, and the discharge end of the first weighing and conveying device 801 is connected to the feeding port of the premixing and dosing device 4 through the coal powder conveying pipe L1.

[0064] Preferably, a buffer bin 9 is arranged between the coal powder bin 1 and the first weighing and conveying device 801. The discharge port of the coal powder bin 1 is connected to the feeding port of the buffer bin 9. The discharge port of the buffer bin 9 is connected to the feeding end of the first weighing and conveying device 801. Preferably, an air duct L4 is arranged between the buffer bin 9 and the continuous mixing device 5.

[0065] In this invention, the system further includes a second weighing and conveying device 802 disposed between the binder silo 2 and the premixed feeding device 4. The outlet of the binder silo 2 is connected to the inlet of the second weighing and conveying device 802, and the outlet of the second weighing and conveying device 802 is connected to the inlet of the premixed feeding device 4 via a binder conveying pipe L2. Preferably, the binder conveying pipe L2 is merged into the pulverized coal conveying pipe L1.

[0066] In this invention, the outlet of the buffer tank 3 is connected to the inlet of the continuous mixing device 5 via a water supply pipe L3. A volumetric pump 10 and a flow meter 11 are mounted on the water supply pipe L3.

[0067] In this invention, discharge valves 12 are respectively provided at the discharge ports of the pulverized coal silo 1, the binder silo 2, and the buffer silo 9. Preferably, the discharge valves 12 are volumetric discharge valves.

[0068] In this invention, a level sensor is installed inside the pulverized coal silo 1. A liquid level detection device is installed inside the buffer water tank 3.

[0069] In this invention, a mixing hopper 13 and a discharge hopper 14 are provided between the continuous mixing device 5 and the screw conveyor 6. The discharge port of the continuous mixing device 5 is connected to the inlet of the mixing hopper 13. The discharge port of the mixing hopper 13 is connected to the inlet of the discharge hopper 14. The discharge port of the discharge hopper 14 is connected to the inlet of the screw conveyor 6.

[0070] Preferably, a plurality of feeding hoppers 14 are provided below the mixing silo 13. The plurality of feeding hoppers 14 are arranged in a ring or evenly arranged along the circumference below the mixing silo 13. Each feeding hopper 14 is equipped with a screw conveyor 6 and a pelletizer 7 below it.

[0071] In this invention, the system also includes a main conveyor belt 15 disposed downstream of the pellet mill 7. The plurality of pellet mills 7 are each connected to the main conveyor belt 15 via their respective auxiliary belts 701.

[0072] Preferably, the plurality of pellet mills 7 are arranged at staggered intervals around the main conveyor belt 15. Preferably, the plurality of pellet mills 7 are arranged in a swastika shape or a similar swastika shape.

[0073] In this invention, the pelletizer 7 is a flat die pelletizer or a ring die pelletizer, preferably a ring die pelletizer. Example 1

[0074] like Figure 1As shown, a continuous premixed raw material processing system for preparing activated carbon includes a coal powder silo 1, a binder silo 2, a buffer water tank 3, a premixing feeding device 4, a continuous mixing device 5, a screw conveyor 6, and a granulator 7. The outlets of the coal powder silo 1 and the binder silo 2 are connected to the inlet of the premixing feeding device 4. The outlet of the premixing feeding device 4 is connected to the inlet of the continuous mixing device 5. The outlet of the buffer water tank 3 is connected to the inlet of the continuous mixing device 5. The outlet of the continuous mixing device 5 is connected to the inlet of the screw conveyor 6, and the outlet of the screw conveyor 6 is connected to the inlet of the granulator 7. Example 2

[0075] like Figure 2 As shown, Embodiment 1 is repeated, except that the premixed feeding device 4 includes a housing 401, a rotating shaft 402, a transmission mechanism 403, a drive mechanism 404, and blades 405. The housing 401 has a multi-diameter variable structure along its axial direction. The inlet and outlet of the premixed feeding device 4 are respectively located at the top and bottom of the housing 401. The rotating shaft 402 is located on the central axis of the housing 401, between the top and bottom of the housing 401. The transmission mechanism 403 is connected to the rotating shaft 402. The drive shaft of the transmission mechanism 403 extends out of the housing 401 and is connected to the drive mechanism 404 located outside the housing 401. Blades 405 are provided on the rotating shaft 402. Example 3

[0076] The same embodiment 2 is repeated, except that the rotating shaft 402 is provided with multiple blades 405. The multiple blades 405 are divided into multiple groups and arranged in the axial direction. Example 4

[0077] Example 3 is repeated, except that the housing 401 has a multi-layered hourglass structure along the axial direction. A set of blades is provided in each section of the housing 401 where the diameter changes and turns. Example 5

[0078] Example 4 is repeated, except that the blade 405 located at the diameter change in each group of blades is the longest. The length of each blade 405 in each group of blades decreases from the diameter change in the inflection point to both sides. Example 6

[0079] Example 5 is repeated, except that the multiple blades 405 in each group of blades are arranged spirally along the axial direction. Example 7

[0080] like Figure 3As shown, the embodiment 6 is repeated, except that the premixing and dosing device 4 further comprises a bracket 406 arranged in the housing 401. The bracket 406 comprises a radial bracket 40601 and an annular bracket 40602. The radial bracket 40601 is arranged between the rotating shaft 402 and the inner wall of the housing 401. The annular bracket 40602 is arranged in abutment with the inner wall of the housing 1. Embodiment 8

[0081] The embodiment 7 is repeated, except that a plurality of radial brackets 40601 and annular brackets 40602 are arranged in the housing 401 along the axial direction. The radial brackets 40601 are arranged at the protruding positions of the inner diameter of the housing 401, and the annular brackets 40602 are arranged at the recessed positions of the inner diameter of the housing 401. Embodiment 9

[0082] The embodiment 8 is repeated, except that the premixing and dosing device 4 further comprises a bearing seat 407 and a bearing 408. The bearing seat 407 is arranged on the central axis of the housing 401 and is fixedly connected with the housing 401. The bearing 408 is arranged in the bearing seat 407. The rotating shaft 402 is arranged at the central axis of the housing 1 through the bearing 408. Embodiment 10

[0083] The embodiment 9 is repeated, except that the system further comprises a first weighing and conveying device 801 arranged between the pulverized coal bin 1 and the premixing and dosing device 4. The discharge port of the pulverized coal bin 1 is connected with the feeding end of the first weighing and conveying device 801, and the discharge end of the first weighing and conveying device 801 is connected to the feeding port of the premixing and dosing device 4 through the pulverized coal conveying pipe L1. Embodiment 11

[0084] The embodiment 10 is repeated, except that a buffer bin 9 is further arranged between the pulverized coal bin 1 and the first weighing and conveying device 801. The discharge port of the pulverized coal bin 1 is connected to the feeding port of the buffer bin 9. The discharge port of the buffer bin 9 is connected to the feeding end of the first weighing and conveying device 801. Embodiment 12

[0085] The embodiment 11 is repeated, except that an air duct L4 is further arranged between the buffer bin 9 and the continuous mixing device 5. Embodiment 13

[0086] The embodiment 12 is repeated, except that the system further comprises a second weighing and conveying device 802 arranged between the binder bin 2 and the premixing and dosing device 4. The discharge port of the binder bin 2 is connected with the feeding end of the second weighing and conveying device 802, and the discharge end of the second weighing and conveying device 802 is connected to the feeding port of the premixing and dosing device 4 through the binder conveying pipe L2. Embodiment 14

[0087] Example 13 is repeated, except that the binder conveying pipe L2 is merged into the pulverized coal conveying pipe L1. Example 15

[0088] Example 14 is repeated, except that the outlet of the buffer tank 3 is connected to the inlet of the continuous mixing device 5 via a water supply pipe L3. A volumetric pump 10 and a flow meter 11 are installed on the water supply pipe L3. Example 16

[0089] Example 15 is repeated, except that a discharge valve 12 is provided at the discharge port of the pulverized coal bin 1, the binder bin 2, and the buffer bin 9. The discharge valve 12 is a volumetric discharge valve. Example 17

[0090] Example 16 is repeated, except that a level sensor is installed in the pulverized coal silo 1, and a liquid level detection device is installed in the buffer water tank 3. Example 18

[0091] The embodiment 17 is repeated, except that a mixing hopper 13 and a discharge hopper 14 are also provided between the continuous mixing device 5 and the screw conveyor 6. The discharge port of the continuous mixing device 5 is connected to the inlet of the mixing hopper 13. The discharge port of the mixing hopper 13 is connected to the inlet of the discharge hopper 14. The discharge port of the discharge hopper 14 is connected to the inlet of the screw conveyor 6. Example 19

[0092] The embodiment 18 is repeated, except that four feeding hoppers 14 are provided below the mixing silo 13. The four feeding hoppers 14 are evenly arranged in a circumferential direction below the mixing silo 13. Each feeding hopper 14 is equipped with a screw conveyor 6 and a pelletizer 7 below it. Example 20

[0093] The system repeats Embodiment 19, except that it also includes a main conveyor belt 15 located downstream of the pellet mills 7. The four pellet mills 7 are each connected to the main conveyor belt 15 via their respective auxiliary belts 701. The four pellet mills 7 are arranged at staggered intervals around the main conveyor belt 15. Example 21

[0094] like Figure 4 As shown, Example 20 is repeated, except that the four pellet mills 7 are arranged in a swastika pattern. Example 22

[0095] Example 21 is repeated, except that the pellet mill 7 is a ring die pellet mill.

Claims

1. A continuous premixed raw material processing system for preparing activated carbon, characterized in that: The system includes a coal powder silo (1), a binder silo (2), a buffer water tank (3), a premix feeding device (4), a continuous mixing device (5), a screw conveyor (6), and a pellet mill (7); wherein, the outlet of the coal powder silo (1) and the outlet of the binder silo (2) are respectively connected to the inlet of the premix feeding device (4); the outlet of the premix feeding device (4) is connected to the inlet of the continuous mixing device (5); the outlet of the buffer water tank (3) is connected to the inlet of the continuous mixing device (5); the outlet of the continuous mixing device (5) is connected to the inlet of the screw conveyor (6), and the outlet of the screw conveyor (6) is connected to the inlet of the pellet mill (7).

2. The system according to claim 1, characterized in that: The premixed feeding device (4) includes a housing (401), a rotating shaft (402), a transmission mechanism (403), a drive mechanism (404), and a blade (405); wherein, the housing (401) has a multi-diameter variable structure along the axial direction; the inlet and outlet of the premixed feeding device (4) are respectively located at the top and bottom of the housing (401); the rotating shaft (402) is located on the central axis of the housing (401) and between the top and bottom of the housing (401); the transmission mechanism (403) is connected to the rotating shaft (402); the drive shaft of the transmission mechanism (403) extends out of the housing (401) and is connected to the drive mechanism (404) located outside the housing (401); the rotating shaft (402) is provided with a blade (405).

3. The system according to claim 2, characterized in that: The rotating shaft (402) is provided with multiple blades (405); preferably, the multiple blades (405) are divided into multiple groups and arranged in the axial direction; Preferably, the housing (401) has a multi-layer hourglass structure along the axial direction; preferably, a set of blades is provided in each section of the housing (401) where the diameter changes and turns.

4. The system according to claim 3, characterized in that: The blade (405) located at the diameter transition point in each group of blades is the longest; preferably, the length of each blade (405) in each group decreases from the diameter transition point towards both sides; and / or The multiple blades (405) in each group of blades are arranged spirally along the axial direction.

5. The system according to any one of claims 2-4, characterized in that: The premixed feeding device (4) further includes a bracket (406) disposed inside the housing (401); the bracket (406) includes a radial bracket (40601) and an annular bracket (40602); wherein, the radial bracket (40601) is disposed between the rotating shaft (402) and the inner wall of the housing (401); the annular bracket (40602) is disposed in close contact with the inner wall of the housing (1); Preferably, the housing (401) is provided with a plurality of radial frames (40601) and annular frames (40602) along the axial direction; wherein, the radial frames (40601) are provided at various protruding positions on the inner diameter of the housing (401), and the annular frames (40602) are provided at various recessed positions on the inner diameter of the housing (401).

6. The system according to any one of claims 2-5, characterized in that: The premixed feeding device (4) further includes a bearing seat (407) and a bearing (408); wherein, the bearing seat (407) is located on the central axis inside the housing (401) and is fixedly connected to the housing (401); the bearing (408) is installed inside the bearing seat (407); the rotating shaft (402) is located on the central axis inside the housing (1) through the bearing (408).

7. The system according to any one of claims 1-6, characterized in that: The system also includes a first weighing and conveying device (801) disposed between the coal powder silo (1) and the premixed feeding device (4); the outlet of the coal powder silo (1) is connected to the inlet of the first weighing and conveying device (801), and the outlet of the first weighing and conveying device (801) is connected to the inlet of the premixed feeding device (4) through the coal powder conveying pipe (L1); Preferably, a buffer chamber (9) is provided between the pulverized coal silo (1) and the first weighing and conveying device (801); the outlet of the pulverized coal silo (1) is connected to the inlet of the buffer chamber (9); the outlet of the buffer chamber (9) is connected to the inlet of the first weighing and conveying device (801); preferably, a ventilation pipe (L4) is provided between the buffer chamber (9) and the continuous mixing device (5).

8. The system according to claim 7, characterized in that: The system also includes a second weighing and conveying device (802) disposed between the binder silo (2) and the premixed feeding device (4); the outlet of the binder silo (2) is connected to the inlet of the second weighing and conveying device (802), and the outlet of the second weighing and conveying device (802) is connected to the inlet of the premixed feeding device (4) through a binder conveying pipe (L2); preferably, the binder conveying pipe (L2) is merged into a pulverized coal conveying pipe (L1); and / or The outlet of the buffer tank (3) is connected to the inlet of the continuous mixing device (5) via a water supply pipe (L3); a volumetric pump (10) and a flow meter (11) are provided on the water supply pipe (L3).

9. The system according to claim 7 or 8, characterized in that: Discharge valves (12) are respectively provided at the outlets of the pulverized coal silo (1), the binder silo (2), and the buffer silo (9); preferably, the discharge valves (12) are volumetric discharge valves; and / or The coal powder silo (1) is equipped with a material level sensor; the buffer water tank (3) is equipped with a liquid level detection device.

10. The system according to any one of claims 1-9, characterized in that: A mixing bin (13) and a discharge hopper (14) are provided between the continuous mixing device (5) and the screw conveyor (6); the discharge port of the continuous mixing device (5) is connected to the inlet of the mixing bin (13); the discharge port of the mixing bin (13) is connected to the inlet of the discharge hopper (14); the discharge port of the discharge hopper (14) is connected to the inlet of the screw conveyor (6); Preferably, a plurality of feeding hoppers (14) are provided below the mixing silo (13); the plurality of feeding hoppers (14) are arranged in a ring or evenly arranged along the circumference below the mixing silo (13); each feeding hopper (14) is equipped with a screw conveyor (6) and a pellet mill (7) below it.

11. The system according to claim 10, characterized in that: The system also includes a main conveyor belt (15) located downstream of the pellet mill (7); the plurality of pellet mills (7) are respectively connected to the main conveyor belt (15) via their respective auxiliary belts (701). Preferably, the plurality of pellet mills (7) are arranged at staggered intervals around the main conveyor belt (15); preferably, the plurality of pellet mills (7) are arranged in a swastika or similar swastika shape; and / or The pellet mill (7) is a flat die pellet mill or a ring die pellet mill, preferably a ring die pellet mill.

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