Premixing type raw material continuous treatment system for preparing activated carbon

Abstract

The utility model 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. The device can realize continuous treatment of raw materials so as to continuously prepare activated carbon and improve the yield and quality of activated carbon production; 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] The utility model relates to a raw material processing system, in particular to a premixed raw material continuous processing system for preparing activated carbon, belonging to the field of activated carbon preparation and environmental protection. Background Art

[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 continuously improving and innovating.

[0003] Large particle activated carbon preparation process Figure 5 As shown in the figure, the raw coal is crushed and ground to make coal powder of a certain particle size, and after adding a certain proportion of binder and water, it is granulated into activated carbon particles of the required size through granulation equipment, and then the activated carbon particle product is obtained through the two processes of carbonization and activation. At present, the large-particle activated carbon raw material mixing equipment is mainly intermittent double-roll kneading equipment.

[0004] In the prior art, the activated carbon raw material mixing process is called kneading operation because of the name and characteristics of the processing equipment. When the existing kneading (mixing) equipment is working, all the coal powder raw materials are first added to the equipment, and then the adhesive is added and kneaded for a period of time, and then water is added and kneaded. After completion, the discharge port is opened to discharge the materials and enter the next process. This feeding and mixing method has poor mixing effect of each component material and low processing capacity. The more materials are added at one time, the more difficult it is to evenly disperse the materials, so large-scale production cannot be achieved. The kneading equipment is an intermittent production, processing 400-500kg at a time. The curved double-roller rotor rotates slowly in opposite directions. The rollers turn and knead the materials to complete the mixing of various materials. The roller speed is generally 10-20rmp, the kneading time is 8-12 minutes, and the single processing capacity is 3-3.5t / h. In order to meet production needs, multiple kneading machines are generally configured for operation, which increases the difficulty of maintenance, requires more operators, and increases the floor space. On the other hand, there are many kneading devices, and each device needs to be equipped with a raw material adding system. Affected by the raw materials and the equipment itself, the kneading effects of multiple systems are inconsistent. At the same time, it is also affected by multiple factors such as the operation of different personnel, which can easily cause unstable mixing granulation quality and affect the stability of the final product.

[0005] In the original production process, the valve at the lower end of the coal powder bin is opened first, and the raw coal powder is introduced into the metering bin. The metering bin has a weighing function. When the weight of the coal powder in the metering bin reaches 350-400kg, the valve is closed to stop the coal feeding. The valve at the lower end of the metering bin is opened to put a certain amount of coal powder into the kneading machine; then the valve at the lower end of the binder bin is opened, and a certain amount of binder is put into the kneading machine. The binder bin has a weighing function. The weight of the discharged binder is determined by real-time weighing. When it reaches a certain weight, the valve is closed immediately to achieve quantitative addition of binder; in addition, water is added quantitatively through a solenoid valve in conjunction with a flow meter. After the kneading machine is stirred, the discharge door is opened to discharge the material, and the discharge door is closed after emptying. This cycle is used to realize production. Each time the valve is opened and closed and weighed, there is a certain error, which leads to inconsistent proportions each time the materials are stirred, affecting product stability.

[0006] As existing kneading equipment cannot achieve large-scale production due to intermittent operation and inconsistent material mixing ratios result in poor product stability, this application proposes a continuous preparation method for activated carbon using continuous raw material processing to increase the processing capacity, thereby improving the output and quality of activated carbon production. However, directly changing the existing activated carbon preparation process to a continuous production process with continuous input of raw materials has the following technical problems: in the existing activated carbon preparation process, coal powder, binder (solid binder) and water are often directly added to a kneader for mixing. A large amount of water is added during the kneading process. On the one hand, due to overheating and frictional heat generated during the kneading process, a certain amount of water vapor will evaporate and form. When the kneading equipment adopts a continuous production method and raw materials are continuously input into the kneading equipment, the evaporated water vapor will flow into the binder feed channel. Since the binder has high water absorption, the water vapor entering the binder feed channel is easily absorbed by the binder, resulting in the binder being compacted and the binder feed channel being blocked, affecting the continuous input of the binder, and further affecting the continuous production of activated carbon; on the other hand, as mentioned above, the binder is easy to contact with water and quickly absorbs water to form a mass, which will affect the uniform fusion of the components in the mixing operation, resulting in instability in the subsequent granulation quality, thereby affecting the performance of the final activated carbon product. Utility Model Content

[0007] In view of the deficiencies in the above-mentioned prior art, the utility model proposes a premixed raw material continuous processing system for preparing activated carbon. The system includes a coal powder bin, a binder bin, a buffer water tank, a premixing feeding device, a continuous mixing device, a screw conveyor, and a granulator. Among them, the coal powder bin and the binder bin respectively continuously feed coal powder and binder into the premixing feeding device, the premixing feeding device preliminarily mixes the coal powder and the binder, and continuously conveys the obtained premixed raw material to the continuous mixing device. At the same time, the buffer water tank continuously conveys water into the continuous mixing device, the continuous mixing device mixes the premixed raw material and water again, and continuously conveys the obtained mixed raw material to the granulator through a screw conveyor for granulation, thereby realizing continuous processing of raw materials, and then being able to continuously prepare activated carbon, effectively solving the problem that intermittent operation in the prior art cannot realize large-scale production of activated carbon and the problem that the product stability is poor due to inconsistent mixing ratios of multiple materials, and improving the output and quality of activated carbon production.

[0008] In the technical solution of the utility model, the coal powder and the binder are firstly mixed in the premixing feeding device, and the premixed raw materials obtained after the preliminary mixing are mixed again with water in the continuous mixing device. That is, in the continuous preparation process of activated carbon, the setting of the premixing feeding device in the utility model can isolate the water vapor generated during the stirring process of the continuous mixing device, and prevent the water vapor from flowing up into the binder feeding channel. Moreover, the premixing feeding device has a stirring effect. Even if the water vapor flows up into the premixing feeding device, it is not easy to produce material compaction in the device, thereby avoiding the blockage of the material channel and avoiding the problem of uneven fusion of the component materials caused by the binder absorbing water and forming agglomerates in the prior art.

[0009] According to an embodiment of the utility model, a premixed raw material continuous processing system for preparing activated carbon is provided.

[0010] A premixed raw material continuous processing system for preparing activated carbon, the system comprising a coal powder bin, a binder bin, a buffer water tank, a premixed feeding device, a continuous mixing device, a screw conveyor, and a granulator. The discharge port of the coal powder bin and the discharge port of the binder bin are respectively connected to the feed port of the premixed feeding device. The discharge port of the premixed feeding device is connected to the feed port of the continuous mixing device. The water outlet of the buffer water tank is connected to the water inlet of the continuous mixing device. The discharge port of the continuous mixing device is connected to the feed end of the screw conveyor, and the discharge end of the screw conveyor is connected to the feed port of the granulator.

[0011] In the utility model, the premixing feeding device comprises a shell, a rotating shaft, a transmission mechanism, a driving mechanism, and a paddle. The shell is a multiple diameter-changing structure along the axial direction. The feed port and the discharge port of the premixing feeding device are respectively arranged at the top and the bottom of the shell. The rotating shaft is arranged on the central axis of the shell and is located between the top and the bottom of the shell. The rotating shaft is connected with a transmission mechanism. The driving shaft of the transmission mechanism extends out of the shell and is connected with the driving mechanism arranged outside the shell. The rotating shaft is provided with a paddle.

[0012] In the utility model, a plurality of blades are arranged on the rotating shaft. Preferably, the plurality of blades are divided into a plurality of groups for arrangement in the axial direction.

[0013] Preferably, the shell is a multi-layer hourglass structure along the axial direction. Preferably, a group of blades is respectively arranged in each diameter-changing turning area of ​​the shell.

[0014] In the present invention, the blades at the diameter-changing turning position in each set of blades are the longest. Preferably, the lengths of the blades in each set of blades decrease gradually from the diameter-changing turning position to both sides.

[0015] In the utility model, the multiple blades in each group of blades are arranged in a spiral shape along the axial direction.

[0016] In the present invention, the premixing feeding device further comprises a bracket arranged in the shell. The bracket comprises a radial bracket and an annular bracket. The radial bracket is arranged between the rotating shaft and the inner wall of the shell. The annular bracket is arranged in close contact with the inner wall of the shell.

[0017] Preferably, a plurality of radial frames and annular frames are provided in the shell along the axial direction. The radial frames are provided at various raised positions of the inner diameter of the shell, and the annular frames are provided at various recessed positions of the inner diameter of the shell. The support arrangement of the radial frames and the annular frames can effectively ensure the stability of various components in the premixing feeding device.

[0018] In the utility model, the premixing feeding device further comprises a bearing seat and a bearing. The bearing seat is arranged on the central axis in the housing and is fixedly connected to the housing (or the bearing seat is fixedly connected to the housing through a bracket). The bearing is installed in the bearing seat. The rotating shaft is arranged at the central axis position in the housing through the bearing.

[0019] In the utility model, the system also includes a first weighing and conveying device arranged between the coal powder bin and the premixing feeding device. The discharge port of the coal powder bin is connected to the feed end of the first weighing and conveying device, and the discharge end of the first weighing and conveying device is connected to the feed port of the premixing feeding device through a coal powder conveying pipe.

[0020] Preferably, a buffer bin is provided between the pulverized coal bin and the first weighing and conveying device. The discharge port of the pulverized coal bin is connected to the feed port of the buffer bin. The discharge port of the buffer bin is connected to the feed end of the first weighing and conveying device. Preferably, a ventilation duct is provided between the buffer bin and the continuous mixing device.

[0021] In the utility model, the system further comprises a second weighing and conveying device arranged between the binder bin and the premixing feeding device. The discharge port of the binder bin is connected to the feed end of the second weighing and conveying device, and the discharge end of the second weighing and conveying device is connected to the feed port of the premixing feeding device through a binder feeding pipe. Preferably, the binder feeding pipe is merged into the coal powder feeding pipe.

[0022] In the utility model, the water outlet of the buffer water tank is connected to the water inlet of the continuous mixing device via a water delivery pipeline. A volumetric pump and a flow meter are arranged on the water delivery pipeline.

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

[0024] In the utility model, a material level sensor is provided in the coal powder bin, and a liquid level detection device is provided in the buffer water tank.

[0025] In the utility model, a mixing bin and a feeding hopper are provided between the continuous mixing device and the screw conveyor. The discharge port of the continuous mixing device is connected to the feed port of the mixing bin. The discharge port of the mixing bin is connected to the feed port of the feeding hopper. The discharge port of the feeding hopper is connected to the feed end of the screw conveyor.

[0026] Preferably, a plurality of feeding hoppers are provided below the mixing silo. The plurality of feeding hoppers are arranged in a ring shape or evenly arranged along the circumference below the mixing silo. A set of screw conveyor and granulator are respectively provided below each feeding hopper.

[0027] In the present invention, the system further comprises a main conveying belt arranged downstream of the granulator. A plurality of the granulators are respectively connected to the main conveying belt through respective auxiliary belts.

[0028] Preferably, the plurality of granulators are arranged at intervals around the main conveyor belt. Preferably, the plurality of granulators are arranged in a swastika or swastika-like arrangement.

[0029] In the utility model, the granulator is a flat die granulator or a ring die granulator, preferably a ring die granulator.

[0030] The utility model proposes a premixed raw material continuous processing system for preparing activated carbon, which includes a coal powder bin, a binder bin, a buffer water tank, a premix feeding device, a continuous mixing device, a screw conveyor, and a granulator. The coal powder bin and the binder bin respectively continuously feed coal powder and binder into the premix feeding device, the premix feeding device preliminarily mixes the coal powder and the binder, and continuously conveys the obtained premixed raw material to the continuous mixing device. At the same time, the buffer water tank continuously conveys water into the continuous mixing device, the continuous mixing device mixes the premixed raw material and water again, and continuously conveys the obtained mixed raw material to the granulator through the screw conveyor for granulation, thereby realizing continuous processing of raw materials, and then being able to continuously prepare activated carbon, effectively solving the problem that intermittent operation in the prior art cannot realize large-scale production of activated carbon and the problem that multiple material mixing ratios are inconsistent, resulting in poor product stability, and improving the output and quality of activated carbon production.

[0031] In the technical solution of the utility model, the coal powder and the binder are firstly mixed in the premixing feeding device, and the premixed raw materials obtained after the preliminary mixing are mixed again with water in the continuous mixing device. That is, in the continuous preparation process of activated carbon, the setting of the premixing feeding device in the utility model can isolate the water vapor generated during the stirring process of the continuous mixing device, and prevent the water vapor from flowing up into the binder feeding channel. Moreover, the premixing feeding device has a stirring effect. Even if the water vapor flows up into the premixing feeding device, it is not easy to produce material compaction in the device, thereby avoiding the blockage of the material channel and avoiding the problem of uneven fusion of the component materials caused by the binder absorbing water and forming agglomerates in the prior art.

[0032] In the present invention, the premixing and feeding device comprises a shell, a rotating shaft arranged on the central axis of the shell, a paddle arranged on the rotating shaft, and a driving mechanism and a transmission mechanism for driving the rotating shaft to drive the paddle to rotate. The shell of the premixing and feeding device in the present invention is a multiple diameter-changing structure along the axis direction, and the rotating shaft can drive the paddle to rotate and stir, so that the material entering the premixing and feeding device is not only sheared by the paddle, but also forms a flipping and diffusion effect due to the change in the diameter of the shell, i.e., the material channel, which greatly improves the premixing capacity of the device, improves the mixing degree of coal powder and binder, and is conducive to the uniform fusion of each component material in the subsequent mixing and granulation process.

[0033] It should be noted that the shell of the premixing and feeding device in the present application is a multiple-diameter variable structure along the axial direction, that is, the diameter of the shell changes in the axial direction, and is arranged in multiple diameter changes; the multiple diameter changes here mean that the diameter of the shell does not change only at a certain position, nor does it increase or decrease along a certain rule, but the diameter of the shell changes at multiple positions in the axial direction, and its change rule will also change once or more times, that is, there will be one or more turning points in the process of shell diameter change (for example: in the axial direction from the feed port to the discharge port, the shell diameter increases and suddenly decreases, or the shell diameter decreases and suddenly increases, or the shell diameter decreases along a certain rule and suddenly continues to decrease according to another rule, or the shell diameter increases along a certain rule and suddenly continues to increase according to another rule, etc., or the shell diameter changes in any of the above situations in a cycle), so as to achieve the effect that the material can form a flipping and diffusion effect in the premixing and feeding device due to the change in the diameter of the shell, thereby improving the premixing capacity of the device.

[0034] The utility model provides a plurality of blades on a rotating shaft. The driving mechanism drives the transmission mechanism to drive the rotating shaft to rotate, and the rotation of the rotating shaft drives the blades to rotate, thereby achieving the stirring effect of the blades. The driving mechanism and the transmission mechanism are not limited, and can provide driving force for the rotating shaft to drive the blades to rotate. 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 multiple blades are divided into multiple groups and arranged in the axial direction of the premixing and feeding device. The grouping arrangement of the multiple blades is adapted to the multiple diameter changes of the shell, that is, a group of blades is respectively arranged in the turning area where the shell diameter changes. In other words, the rotating stirring effect of the blades and the flipping and diffusion effect brought about by the diameter change of the shell cooperate with each other to further enhance the premixing capacity of the device. It is further preferred that the shell of the premixing and feeding device in the utility model is a multi-layer hourglass structure along the axial direction, such as Figure 2 As shown, a group of blades is respectively arranged at each section of the diameter change turning area of ​​the shell, that is, a group of blades is respectively arranged at each convex position and concave position of the multi-layer hourglass. In order to maximize the synergy between the rotating stirring effect of the blades and the flipping and diffusion effect brought about by the diameter change of the shell, the blades at the diameter change turning position in each group of blades are the longest, and the length of each blade decreases from the diameter change turning position to both sides, and the multiple blades in each group of blades are arranged in a spiral along the axis.

[0036] The utility model is also provided with a first weighing and conveying device between the coal powder bin and the premixing feeding device, and a second weighing and conveying device is also provided between the binder bin and the premixing feeding device. The preparation of activated carbon requires that the coal powder, binder, and water in the mixed raw materials meet a certain ratio relationship, and the ratio of each component material remains stable. Therefore, during the continuous processing of the raw materials, the feed amount of each material is required. The first weighing and conveying device or the second weighing and conveying device can continuously weigh the materials entering the device, so that the input amount of coal powder or binder during 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. Furthermore, discharge valves (such as volumetric discharge valves) are respectively provided at the discharge ports of the coal powder bin and the binder bin. During the continuous feeding process, the real-time control of the coal powder or binder feeding speed can be achieved by adjusting the discharge valve, thereby achieving the control of the material feeding amount. Correspondingly, the buffer water tank is connected to the water inlet of the continuous mixing device through a water delivery pipeline, and a volumetric pump and a flow meter are arranged on the water delivery pipeline. By adjusting the rotation speed of the volumetric pump, the water delivery speed can be controlled in real time, and the flow meter can monitor and feedback the real-time water delivery volume. Among them, the volumetric pump can be a gear pump or a reciprocating pump, and the volumetric pump adopts variable frequency speed regulation drive, and the volumetric pump driving frequency is adjusted by feedback flow data through the flow meter to achieve the purpose of controlling the water flow.

[0037] Generally speaking, large pieces of raw coal are ground into pulverized coal, which is then pneumatically conveyed to a pulverized coal bin. Pneumatic conveying will generate a certain amount of air pressure in the pulverized coal bin. When there is less pulverized coal in the pulverized coal bin, the air pressure will affect the discharge of the lower end of the pulverized coal bin, making the feeding of pulverized coal extremely unstable. In order to reduce the situation where the low material level in the pulverized coal bin causes unstable material flow due to air pressure, the utility model adds a buffer bin between the pulverized coal bin and the first weighing and conveying device, and isolates the air pressure of the pulverized coal bin feeding through the buffer bin. A discharge valve (such as a volumetric discharge valve) is also provided at the discharge port of the buffer bin. In order to further improve the influence of air pressure, the utility model is also provided with a ventilation pipe connecting the buffer bin and the continuous mixing device.

[0038] Preferably, a material level sensor is provided in the coal powder bin, including an upper limit sensor and a lower limit sensor. A liquid level detection device is provided in the buffer water tank, 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 to ensure that water can be added stably. Correspondingly, the binder bin is a weighing bin, and the addition of binder to the binder bin can be opened or closed by the weighing weight of the bin.

[0039] The utility model 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 a multi-point feeding funnel, each feeding funnel is connected to a screw conveyor, and each screw conveyor conveys the material to a matching granulator for granulation. The granulator can be a flat die granulator, and can be preferably provided as a ring die granulator, which has a larger output and better granulation quality.

[0040] like Figure 4 As shown, a main conveying belt is also provided downstream of the granulator, and multiple granulators are connected to the main conveying belt through their own auxiliary belts. Among them, multiple granulators are arranged around the main conveying belt at intervals. Preferably, multiple granulators are arranged in a swastika or a similar swastika shape. On the one hand, the space can be used to arrange the equipment as much as possible, and on the other hand, the intervals between the granulators can be larger to ensure the maintenance space of each equipment; at the same time, the activated carbon granulated particles can be uniformly transported by falling into the same main conveying belt. Figure 4 As shown in , when the auxiliary belt connected to the granulator is located on the main conveying belt, the auxiliary belt conveying equipment can be reduced, and the granulated particles will not be affected from falling into the same main conveying belt.

[0041] The utility model is based on equipment that can realize continuous stirring, wherein the continuous mixing device can be the patented activated carbon cutting and melting machine (CN111530570A) for which the applicant has applied, or can be other continuous mixing equipment.

[0042] In the present invention, 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 feeding device is 0.1-20m, preferably 0.2-10m, more preferably 0.3-8m, and further preferably 0.5-5m.

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

[0044] Compared with the prior art, the utility model has the following beneficial technical effects:

[0045] 1. The premixed raw material continuous processing system for preparing activated carbon described in the utility model can realize continuous processing of raw materials, and then can continuously prepare activated carbon, effectively solving the problems in the prior art that intermittent operation cannot realize large-scale production of activated carbon and that multiple material mixing ratios are inconsistent, resulting in poor product stability, thereby improving the output and quality of activated carbon production.

[0046] 2. In the continuous preparation process of activated carbon, the setting of the premixing feeding device in the utility model can isolate the water vapor generated during the stirring process of the continuous mixing device, and prevent the water vapor from flowing up into the binder feeding channel. Moreover, the premixing feeding device has a stirring effect. Even if the water vapor flows up into the premixing feeding device, it is not easy to produce material compaction in the device, thereby avoiding the blockage of the material channel and the problem of uneven fusion of the component materials caused by the binder absorbing water into agglomerates in the prior art.

[0047] 3. The shell of the premixing feeding device in the utility model is a multiple diameter-variable structure along the axial direction, and the rotating shaft can drive the blades to rotate and stir. Therefore, the material entering the premixing feeding device is not only sheared by the blades, but also forms a flipping and diffusion effect due to the change in the diameter of the shell, that is, the material channel, which greatly improves the premixing capacity of the device and improves the mixing degree of coal powder and binder.

[0048] 4. The utility model arranges the 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 respectively arranged in the turning area where the shell diameter changes, so that the rotating stirring effect of the blades and the flipping and diffusion effect brought about by the diameter change of the shell cooperate with each other, further improving the premixing capacity of the device.

[0049] 5. The shell of the premixing feeding device in the utility model is preferably a multi-layer hourglass structure along the axial direction, and a group of blades are respectively arranged in each section of the shell's variable diameter turning area, that is, a group of blades are respectively arranged at each convex position and concave position of the multi-layer hourglass, and the blades at the variable diameter turning position in each group of blades are the longest, and the length of each blade decreases from the variable diameter turning position to both sides, so that the synergistic effect between the rotating stirring effect of the blades and the flipping and diffusion effect brought about by the diameter change of the shell is maximized as much as possible.

[0050] 6. In the utility model, multiple granulators are arranged in a swastika shape or a similar swastika shape. On the one hand, the space for arranging the equipment can be maximized, and on the other hand, the intervals between the granulators can be larger to ensure the maintenance space for each equipment. At the same time, the activated carbon granulation particles can be uniformly transported by falling into the same main conveyor belt, thereby reducing the auxiliary belt conveyor equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a schematic diagram of the structure of a premixed raw material continuous processing system for preparing activated carbon according to the utility model;

[0052] Figure 2 It is a structural schematic diagram of the premixing feeding device in the utility model;

[0053] Figure 3 It is a top view of the premixing feeding device in the utility model;

[0054] Figure 4 It is a schematic diagram of the arrangement of multiple granulators in the utility model;

[0055] Figure 5 This is the process flow chart for preparing large particle activated carbon.

[0056] Reference numerals:

[0057] 1: pulverized coal bin; 2: binder bin; 3: buffer water tank; 4: premixing unloading device; 401: shell; 402: rotating shaft; 403: transmission mechanism; 404: driving mechanism; 405: blade; 406: bracket; 40601: radial frame; 40602: annular frame; 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: unloading valve; 13: mixing bin; 14: unloading funnel; 15: main conveying belt;

[0058] L1: coal powder conveying pipe; L2: binder conveying pipe; L3: water conveying pipe; L4: ventilation pipe. DETAILED DESCRIPTION

[0059] The technical solution of the utility model is illustrated below, and the scope of protection requested for the utility model includes but is not limited to the following embodiments.

[0060] According to an embodiment of the utility model, a premixed raw material continuous processing system for preparing activated carbon is provided.

[0061] A premixed raw material continuous processing system for preparing activated carbon, the system comprises a coal powder bin 1, a binder bin 2, a buffer water tank 3, a premixed feeding device 4, a continuous mixing device 5, a screw conveyor 6, and a granulator 7. The discharge port of the coal powder bin 1 and the discharge port of the binder bin 2 are respectively connected to the feed port of the premixed feeding device 4. The discharge port of the premixed feeding device 4 is connected to the feed port 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 port of the continuous mixing device 5 is connected to the feed end of the screw conveyor 6, and the discharge end of the screw conveyor 6 is connected to the feed port of the granulator 7.

[0062] In the utility model, the premixing feeding device 4 includes 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-changing structure along the axial direction. The feed port and the discharge port of the premixing feeding 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 is located between the top and the bottom of the shell 401. The rotating shaft 402 is connected to the transmission mechanism 403. 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 rotating shaft 402 is provided with a paddle 405.

[0063] In the present invention, a plurality of blades 405 are provided on the rotating shaft 402. Preferably, the plurality of blades 405 are divided into a plurality of groups for arrangement in the axial direction.

[0064] Preferably, the housing 401 is a multi-layer hourglass structure along the axial direction. Preferably, a group of blades is respectively arranged in each diameter-changing turning area of ​​the housing 401 .

[0065] In the present invention, the blade 405 at the diameter-changing turning position in each set of blades is the longest. Preferably, the length of each blade 405 in each set of blades decreases from the diameter-changing turning position to both sides.

[0066] In the present invention, the multiple blades 405 in each group of blades are arranged in a spiral shape along the axial direction.

[0067] In the present invention, the premixing feeding device 4 further comprises a bracket 406 disposed in the housing 401. The bracket 406 comprises a radial bracket 40601 and an annular bracket 40602. 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 401.

[0068] Preferably, a plurality of radial frames 40601 and annular frames 40602 are provided in the housing 401 along the axial direction, wherein the radial frames 40601 are provided at various raised positions of the inner diameter of the housing 401 , and the annular frames 40602 are provided at various recessed positions of the inner diameter of the housing 401 .

[0069] In the present invention, the premixing feeding device 4 further includes a bearing seat 407 and a bearing 408. The bearing seat 407 is arranged on the central axis in the housing 401 and is fixedly connected to the housing 401. The bearing 408 is installed in the bearing seat 407. The rotating shaft 402 is arranged at the central axis position in the housing 401 through the bearing 408.

[0070] In the present invention, the system further includes a first weighing and conveying device 801 disposed between the pulverized coal bin 1 and the premixing and feeding device 4. The discharge port of the pulverized coal bin 1 is connected to the feed 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 feed port of the premixing and feeding device 4 through the pulverized coal feeding pipe L1.

[0071] Preferably, a buffer bin 9 is further provided 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 feed port of the buffer bin 9. The discharge port of the buffer bin 9 is connected to the feed end of the first weighing and conveying device 801. Preferably, a ventilation pipe L4 is further provided between the buffer bin 9 and the continuous mixing device 5.

[0072] In the present invention, the system further includes a second weighing and conveying device 802 disposed between the binder bin 2 and the premixing feeding device 4. The discharge port of the binder bin 2 is connected to the feed 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 feed port of the premixing feeding device 4 through the binder feeding pipe L2. Preferably, the binder feeding pipe L2 is merged into the coal powder feeding pipe L1.

[0073] In the present invention, the water outlet of the buffer water tank 3 is connected to the water inlet of the continuous mixing device 5 via a water delivery pipeline L3. A volumetric pump 10 and a flow meter 11 are provided on the water delivery pipeline L3.

[0074] In the present invention, discharge valves 12 are respectively provided at the discharge ports of the pulverized coal bin 1, the binder bin 2, and the buffer bin 9. Preferably, the discharge valves 12 are volumetric discharge valves.

[0075] In the utility model, a material level sensor is provided in the coal powder bin 1. A liquid level detection device is provided in the buffer water tank 3.

[0076] In the present invention, a mixing bin 13 and a feeding hopper 14 are further 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 feed port of the mixing bin 13. The discharge port of the mixing bin 13 is connected to the feed port of the feeding hopper 14. The discharge port of the feeding hopper 14 is connected to the feed end of the screw conveyor 6.

[0077] Preferably, a plurality of feeding hoppers 14 are provided below the mixing bin 13. The plurality of feeding hoppers 14 are arranged in a ring shape or evenly arranged along the circumferential direction below the mixing bin 13. A set of screw conveyor 6 and granulator 7 are respectively provided below each feeding hopper 14.

[0078] In the present invention, the system further comprises a main conveying belt 15 arranged downstream of the granulator 7. The plurality of granulators 7 are connected to the main conveying belt 15 via respective auxiliary belts 701.

[0079] Preferably, the plurality of granulators 7 are arranged at intervals around the main conveyor belt 15. Preferably, the plurality of granulators 7 are arranged in a swastika or swastika-like shape.

[0080] In the present invention, the granulator 7 is a flat die granulator or a ring die granulator, preferably a ring die granulator.

[0081] Example 1

[0082] like Figure 1 As shown, a premixed raw material continuous processing system for preparing activated carbon includes a coal powder bin 1, a binder bin 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 discharge port of the coal powder bin 1 and the discharge port of the binder bin 2 are respectively connected to the feed port of the premixing feeding device 4. The discharge port of the premixing feeding device 4 is connected to the feed port 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 port of the continuous mixing device 5 is connected to the feed end of the screw conveyor 6, and the discharge end of the screw conveyor 6 is connected to the feed port of the granulator 7.

[0083] Example 2

[0084] like Figure 2 As shown, Example 1 is repeated, except that the premixing feeding device 4 includes a shell 401, a rotating shaft 402, a transmission mechanism 403, a driving mechanism 404, and a paddle 405. Among them, the shell 401 is a multiple diameter-changing structure along the axial direction. The feed port and the discharge port of the premixing feeding 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 is located between the top and the bottom of the shell 401. The rotating shaft 402 is connected to the transmission mechanism 403. 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 rotating shaft 402 is provided with a paddle 405.

[0085] Example 3

[0086] The second embodiment is repeated, except that a plurality of blades 405 are provided on the rotating shaft 402. The plurality of blades 405 are divided into a plurality of groups and arranged in the axial direction.

[0087] Example 4

[0088] The third embodiment is repeated, except that the housing 401 is a multi-layer hourglass structure along the axial direction. A group of blades is respectively arranged in each diameter-changing turning area of ​​the housing 401 .

[0089] Example 5

[0090] The embodiment 4 is repeated, except that the blade 405 located at the diameter-changing turning position in each set of blades is the longest. The length of each blade 405 in each set of blades decreases from the diameter-changing turning position to both sides.

[0091] Example 6

[0092] Example 5 is repeated, except that the multiple blades 405 in each group of blades are arranged in a spiral along the axial direction.

[0093] Example 7

[0094] like Figure 3 As shown, the embodiment 6 is repeated, except that the premixing feeding device 4 further includes a bracket 406 disposed in the housing 401. The bracket 406 includes a radial bracket 40601 and an annular bracket 40602. 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 401.

[0095] Example 8

[0096] Repeat Example 7, except that multiple radial frames 40601 and annular frames 40602 are provided along the axial direction in the housing 401. The radial frames 40601 are provided at various raised 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.

[0097] Example 9

[0098] The embodiment 8 is repeated, except that the premixing feeding device 4 further includes a bearing seat 407 and a bearing 408. The bearing seat 407 is arranged on the central axis in the housing 401 and is fixedly connected to the housing 401. The bearing 408 is installed in the bearing seat 407. The rotating shaft 402 is arranged at the central axis position in the housing 401 through the bearing 408.

[0099] Example 10

[0100] Example 9 is repeated, except that the system further includes a first weighing and conveying device 801 disposed between the pulverized coal bin 1 and the premixing feeding device 4. The discharge port of the pulverized coal bin 1 is connected to the feed 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 feed port of the premixing feeding device 4 through the pulverized coal feeding pipe L1.

[0101] Embodiment 11

[0102] Example 10 is repeated, except that a buffer bin 9 is further provided 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 feed port of the buffer bin 9. The discharge port of the buffer bin 9 is connected to the feed end of the first weighing and conveying device 801.

[0103] Example 12

[0104] Example 11 is repeated, except that a ventilation pipe L4 is further provided between the buffer bin 9 and the continuous mixing device 5 .

[0105] Example 13

[0106] Example 12 is repeated, except that the system further includes a second weighing and conveying device 802 disposed between the binder bin 2 and the premixing feeding device 4. The discharge port of the binder bin 2 is connected to the feed 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 feed port of the premixing feeding device 4 through the binder feeding pipe L2.

[0107] Embodiment 14

[0108] Example 13 was repeated, except that the binder delivery pipe L2 was merged into the pulverized coal delivery pipe L1.

[0109] Embodiment 15

[0110] Example 14 is repeated, except that the water outlet of the buffer water tank 3 is connected to the water inlet of the continuous mixing device 5 via a water delivery pipeline L3. A volumetric pump 10 and a flow meter 11 are provided on the water delivery pipeline L3.

[0111] Example 16

[0112] The embodiment 15 is repeated, except that discharge valves 12 are respectively provided at the discharge ports of the pulverized coal bin 1, the binder bin 2 and the buffer bin 9. The discharge valves 12 are volumetric discharge valves.

[0113] Embodiment 17

[0114] Example 16 is repeated, except that a material level sensor is provided in the pulverized coal bin 1. A liquid level detection device is provided in the buffer water tank 3.

[0115] Embodiment 18

[0116] Example 17 is repeated, except that a mixing bin 13 and a feeding hopper 14 are further 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 feed port of the mixing bin 13. The discharge port of the mixing bin 13 is connected to the feed port of the feeding hopper 14. The discharge port of the feeding hopper 14 is connected to the feed end of the screw conveyor 6.

[0117] Embodiment 19

[0118] Example 18 is repeated, except that four feeding hoppers 14 are provided below the mixing bin 13. The four feeding hoppers 14 are evenly arranged along the circumferential direction below the mixing bin 13. A set of screw conveyor 6 and granulator 7 are respectively provided below each feeding hopper 14.

[0119] Embodiment 20

[0120] Repeat Example 19, except that the system further includes a main conveyor belt 15 disposed downstream of the granulator 7. The four granulators 7 are respectively connected to the main conveyor belt 15 through their respective auxiliary belts 701. Among them, the four granulators 7 are arranged at intervals around the main conveyor belt 15.

[0121] Example 21

[0122] As Figure 4 shown, repeat Example 20, except that the four granulators 7 are arranged in a卐shape.

[0123] Example 22

[0124] Repeat Example 21, except that the granulator 7 is a ring die granulator.

Claims

1. A premixed raw material continuous processing system for preparing activated carbon, characterized in that: The system comprises a pulverized coal bin (1), a binder bin (2), a buffer water tank (3), a premixing feeding device (4), a continuous mixing device (5), a screw conveyor (6), and a pelletizer (7); wherein the discharge port of the pulverized coal bin (1) and the discharge port of the binder bin (2) are respectively connected to the feed port of the premixing feeding device (4); the discharge port of the premixing feeding device (4) is connected to the feed port 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 port of the continuous mixing device (5) is connected to the feed end of the screw conveyor (6), and the discharge end of the screw conveyor (6) is connected to the feed port of the pelletizer (7).

2. The system according to claim 1, characterized in that: The premixing feeding device (4) comprises a shell (401), a rotating shaft (402), a transmission mechanism (403), a driving mechanism (404), and a paddle (405); wherein the shell (401) is a multiple diameter-changing structure along the axial direction; the feed port and the discharge port of the premixing feeding 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 is located between the top and the bottom of the shell (401); the rotating shaft (402) is connected to the transmission mechanism (403); 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); and the paddle (405) is arranged on the rotating shaft (402).

3. The system according to claim 2, characterized in that: A plurality of paddles (405) are disposed on the rotating shaft (402).

4. The system according to claim 3, characterized in that: The plurality of blades (405) are divided into a plurality of groups and arranged in the axial direction.

5. The system according to claim 4, characterized in that: The shell (401) is a multi-layer hourglass structure along the axial direction.

6. The system according to claim 5, characterized in that: A group of blades is respectively arranged in each diameter-changing turning area of ​​the shell (401).

7. The system according to claim 6, characterized in that: The blade (405) located at the diameter-changing turning position in each group of blades is the longest.

8. The system according to claim 7, characterized in that: The length of each blade (405) in each group of blades decreases gradually from the diameter-changing turning point to both sides; and / or The multiple blades (405) in each group of blades are arranged in a spiral shape along the axial direction.

9. The system according to claim 2, characterized in that: The premix feeding device (4) further comprises a support (406) arranged in the shell (401); the support (406) comprises a radial frame (40601) and an annular frame (40602); wherein the radial frame (40601) is arranged between the rotating shaft (402) and the inner wall of the shell (401); and the annular frame (40602) is arranged in contact with the inner wall of the shell (401).

10. The system according to claim 9, characterized in that: A plurality of radial frames (40601) and annular frames (40602) are arranged in the shell (401) along the axial direction; wherein the radial frames (40601) are arranged at various protruding positions of the inner diameter of the shell (401), and the annular frames (40602) are arranged at various recessed positions of the inner diameter of the shell (401).

11. The system according to claim 2, characterized in that: The premix feeding device (4) further comprises a bearing seat (407) and a bearing (408); wherein the bearing seat (407) is arranged 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); and the rotating shaft (402) is arranged at the central axis position inside the housing (401) via the bearing (408).

12. The system according to any one of claims 1 to 11, characterized in that: The system further comprises a first weighing and conveying device (801) arranged between the pulverized coal bin (1) and the premixing and feeding device (4); the discharge port of the pulverized coal bin (1) is connected to the feed 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 feed port of the premixing and feeding device (4) via a pulverized coal feeding pipe (L1).

13. The system according to claim 12, characterized in that: A buffer bin (9) is also provided 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 feed port of the buffer bin (9); and the discharge port of the buffer bin (9) is connected to the feed end of the first weighing and conveying device (801).

14. The system according to claim 13, characterized in that: A ventilation pipeline (L4) is also provided between the buffer bin (9) and the continuous mixing device (5).

15. The system according to claim 12, characterized in that: The system further comprises a second weighing and conveying device (802) arranged between the binder bin (2) and the premixing and discharging device (4); the discharge port of the binder bin (2) is connected to the feed 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 feed port of the premixing and discharging device (4) via a binder delivery pipe (L2); and / or The water outlet of the buffer water tank (3) is connected to the water inlet of the continuous mixing device (5) via a water delivery pipeline (L3); a volumetric pump (10) and a flow meter (11) are provided on the water delivery pipeline (L3).

16. The system according to claim 15, characterized in that: The binder delivery pipe (L2) is merged into the pulverized coal delivery pipe (L1).

17. The system according to claim 13, characterized in that: The discharge ports of the pulverized coal bin (1), the binder bin (2), and the buffer bin (9) are respectively provided with discharge valves (12); and / or A material level sensor is provided in the pulverized coal bin (1); and a liquid level detection device is provided in the buffer water tank (3).

18. The system according to claim 17, characterized in that: The discharge valve (12) is a volumetric discharge valve.

19. The system according to any one of claims 1-11, 13-18, characterized in that: A mixing bin (13) and a feeding 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 feed port of the mixing bin (13); the discharge port of the mixing bin (13) is connected to the feed port of the feeding hopper (14); and the discharge port of the feeding hopper (14) is connected to the feed end of the screw conveyor (6).

20. The system according to claim 12, characterized in that: A mixing bin (13) and a feeding 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 feed port of the mixing bin (13); the discharge port of the mixing bin (13) is connected to the feed port of the feeding hopper (14); and the discharge port of the feeding hopper (14) is connected to the feed end of the screw conveyor (6).

21. The system according to claim 19, characterized in that: A plurality of material discharge funnels (14) are arranged below the mixing bin (13); the plurality of material discharge funnels (14) are arranged in a ring shape or evenly arranged along a circumferential direction below the mixing bin (13); and a set of screw conveyors (6) and granulators (7) are respectively arranged below each material discharge funnel (14).

22. The system according to claim 20, characterized in that: A plurality of material discharge funnels (14) are arranged below the mixing bin (13); the plurality of material discharge funnels (14) are arranged in a ring shape or evenly arranged along a circumferential direction below the mixing bin (13); and a set of screw conveyors (6) and granulators (7) are respectively arranged below each material discharge funnel (14).

23. The system according to claim 21 or 22, characterized in that: The system further comprises a main conveying belt (15) arranged downstream of the granulator (7); a plurality of granulators (7) are respectively connected to the main conveying belt (15) via respective auxiliary belts (701).

24. The system according to claim 23, characterized in that: A plurality of the granulators (7) are arranged at intervals and staggered around the main conveyor belt (15); and / or The granulator (7) is a flat die granulator or a ring die granulator.

25. The system according to claim 24, characterized in that: The plurality of granulators (7) are arranged in a swastika or swastika-like arrangement; and / or The granulator (7) is a ring die granulator.

Images