A raw material pre-extrusion equipment for the preparation of activated carbon

Abstract

The present invention provides a raw material pre-extrusion equipment for preparing activated carbon, comprising a bottom support, a drive mechanism, and an extrusion and conveying mechanism. The extrusion and conveying mechanism comprises a barrel assembly fixedly mounted on the bottom support, and a screw rod rotatably mounted in the barrel assembly. The barrel assembly comprises a first barrel and a second barrel, the second barrel comprising an extrusion barrel section and a discharge barrel section, the inner diameter of the extrusion barrel section gradually decreases from the first barrel toward the discharge barrel section, the discharge barrel section is provided with a discharge port for discharging the raw material from the extrusion barrel section, the screw rod comprises a conveying and extrusion screw section and a discharge screw section that are connected to each other, the drive mechanism drives the screw rod to rotate in the barrel assembly, extrudes and conveys the raw material from the barrel feed port along the extension direction of the barrel assembly, and discharges the raw material from the discharge port. The present application can fully extrude and convey the activated carbon raw material and fully squeeze out the gas in the material through the segmented coordination of the barrel assembly and the screw rod, thereby improving the quality of the activated carbon.

Description

Technical Field

[0001] The invention relates to the technical field of fume purification in the metallurgical industry, in particular to raw material pre-extrusion equipment for preparing activated carbon. Background Art

[0002] In recent years, with the implementation of China's environmental protection policies, the activated carbon industry for flue gas purification has experienced rapid development. Domestic demand for activated carbon will continue to grow, the activated carbon industry is developing rapidly, and activated carbon production equipment is also undergoing continuous improvement and innovation. In particular, in the field of air pollution control, the use of activated carbon (i.e., large-particle activated carbon) for flue gas treatment has seen rapid development, with outstanding purification effects. In recent years, activated carbon desulfurization and denitrification technology has been applied to flue gas purification in the steel industry, achieving greater treatment capacity. With its excellent purification effects and recyclable activated carbon, desulfurization and denitrification activated carbon technology will become the development trend of flue gas purification in the entire steel industry, with a promising future.

[0003] In existing technology, materials processed in cutting and melting devices (such as kneaders) are subjected to high-speed stirring, causing them to become loose and fluffy. This loose material contains a high amount of air, which is not conducive to subsequent granulation. The granulation process compresses the material through membrane pores to form dense columnar particles. The looser the material before granulation, the more air it contains, which reduces extrusion efficiency and even affects granulation quality. Therefore, the material after cutting and melting needs to be pre-extruded.

[0004] In view of this, it is necessary to propose a raw material pre-extrusion equipment for preparing activated carbon to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0005] The main purpose of the present invention is to provide a raw material pre-extrusion equipment for the preparation of activated carbon, so as to solve the problem in the prior art that the high gas content of the material after being processed by the cutting and melting device affects the quality of the activated carbon granulation.

[0006] To achieve the above-mentioned object, the present invention provides a raw material pre-extrusion equipment for preparing activated carbon, comprising a bottom bracket, a driving mechanism and an extrusion conveying mechanism, wherein the extrusion conveying mechanism is fixedly arranged on the top of the bottom bracket, wherein:

[0007] The extrusion conveying mechanism includes a barrel assembly fixedly mounted on the bottom bracket and a screw rod rotatably mounted in the barrel assembly; wherein,

[0008] The cylinder assembly includes a first cylinder and a second cylinder connected to each other; wherein,

[0009] The first cylinder is provided with a cylinder feed port at one end away from the second cylinder;

[0010] The second cylinder includes an extrusion cylinder section and a discharge cylinder section, the extrusion cylinder section is connected to the first cylinder, the discharge cylinder section is connected to the end of the extrusion cylinder section away from the first cylinder, the inner diameter of the extrusion cylinder section gradually decreases from the first cylinder toward the discharge cylinder section, and the discharge cylinder section is provided with a discharge port for discharging raw materials from the extrusion cylinder section;

[0011] The screw rod includes a conveying and extruding screw segment and a discharge screw segment connected to each other, the conveying direction of the conveying and extruding screw segment is consistent with the conveying direction of the discharge screw segment; the conveying and extruding screw segment is rotatably mounted in the first barrel, and the discharge screw segment is rotatably mounted in the second barrel, and the length of the conveying and extruding screw segment is greater than the length of the discharge screw segment;

[0012] The driving mechanism is used to drive the screw rod to rotate in the barrel assembly, squeeze and transport the raw materials from the barrel feed port along the extension direction of the barrel assembly, and discharge them from the discharge port.

[0013] Preferably, it also includes a feeding mechanism located above the extrusion conveying mechanism, the feeding mechanism includes a vibrating hopper and a fixed hopper located below the vibrating hopper, the fixed hopper is fixed to the top of the first cylinder, the discharge port of the vibrating hopper is connected to the feed port of the fixed hopper, and the discharge port of the fixed hopper is connected to the feed port of the cylinder.

[0014] Preferably, the inner wall of the extrusion barrel section is formed with a spiral groove extending along the length direction of the extrusion barrel section, the rotation direction of the spiral groove is opposite to the rotation direction of the unloading screw section, and the pitch of the spiral groove is less than or equal to the pitch of the unloading screw section.

[0015] Preferably, the conveying and extruding screw segment includes a first conveying and extruding screw segment and a second conveying and extruding screw segment, the first conveying and extruding screw segment is connected between the discharge screw segment and the second conveying and extruding screw segment, and each circle of the spiral blades on the first conveying and extruding screw segment is provided with two first interruption grooves at intervals;

[0016] and / or,

[0017] Each circle of spiral blades on the unloading screw segment is provided with two second interruption grooves at intervals.

[0018] Preferably, the inner wall of the extrusion cylinder section is a conical surface, and the taper of the conical surface is set between 70 and 85 degrees.

[0019] Preferably, the conveying extrusion screw segment and the discharge screw segment are both heterosexual spiral structures, the pitch of the conveying extrusion screw segment gradually increases from the conveying starting point to the conveying end point, and the pitch of the discharge screw segment gradually increases from the conveying starting point to the conveying end point.

[0020] Preferably, the extrusion barrel section and the discharge barrel section are detachably connected, and the discharge barrel section is provided with a first bearing seat for rotating the discharge screw section at an end away from the first barrel, and the first barrel is provided with a second bearing seat for rotating the conveying extrusion screw section at an end away from the second barrel.

[0021] Preferably, the vibrating bucket is equipped with an upper level meter for detecting the material level in the vibrating bucket, and the fixed bucket is equipped with a lower level meter near the cylinder feed port for detecting whether there is material at the lower end of the fixed bucket.

[0022] Preferably, the conveying and extruding screw segment includes a first conveying and extruding screw segment and a second conveying and extruding screw segment, the first conveying and extruding screw segment is connected between the discharge screw segment and the second conveying and extruding screw segment, and each circle of the spiral blades on the first conveying and extruding screw segment is provided with two first interruption grooves at intervals;

[0023] Moreover, two second interruption grooves are arranged at intervals between each circle of spiral blades on the unloading screw section; wherein, the groove width of the first interruption groove gradually increases from the groove bottom to the groove top, and the angle between the two first interruption grooves in the cross section is set at 90~180°; the groove width of the second interruption groove gradually increases from the groove bottom to the groove top, and the angle between the two second interruption grooves in the cross section is set at 90~180°.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention provides a raw material pre-extrusion equipment for preparing activated carbon, comprising a bottom support, a drive mechanism, and an extrusion and conveying mechanism. The extrusion and conveying mechanism comprises a barrel assembly fixedly mounted on the bottom support, and a screw rotatably mounted in the barrel assembly. The barrel assembly comprises a first barrel and a second barrel, the second barrel comprising an extrusion barrel section and a discharge barrel section, the inner diameter of the extrusion barrel section gradually decreasing from the first barrel toward the discharge barrel section, the discharge barrel section being provided with a discharge port for discharging raw material from the extrusion barrel section, the screw comprising a conveying and extrusion screw section and a discharge screw section connected to each other, the drive mechanism driving the screw to rotate in the barrel assembly, extruding and conveying the raw material from the barrel feed port along the extension direction of the barrel assembly, and discharging the raw material from the discharge port. The present application utilizes the barrel assembly and the screw to cooperate in sections, and performs preliminary extrusion of the material through the cooperation between the conveying and extrusion section and the first barrel, and then further and fully extrudes the material through the extrusion barrel section and the discharge screw section, fully extruding the gas in the material, and ensuring smooth conveyance and discharge of the material, thereby improving the quality and processing efficiency of the activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is one of the partial cross-sectional views of the overall structure of one embodiment of the present invention;

[0028] Figure 2 This is a second partial cross-sectional view of the overall structure of an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 4 This is one of the structural schematic diagrams of a spiral rod in one embodiment of the present invention;

[0031] Figure 5 This is a second structural diagram of a spiral rod in one embodiment of the present invention;

[0032] Figure 6 for Figure 5 Schematic diagram of the cross section along the DD direction;

[0033] Figure 7 for Figure 5 Schematic diagram of the cross section along the EE direction.

[0034] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0035] Description of Figure Numbers:

[0036] 10. Bottom bracket; 20. Driving mechanism; 30. Extrusion and conveying mechanism; 310. Cylinder assembly; 311. First cylinder; 312. Second cylinder; 3121. Extrusion cylinder section; 3122. Spiral groove; 3123. Discharge cylinder section; 3124. Discharge port; 320. Screw rod; 321. Conveying and extruding screw section; 3211. First conveying and extruding screw section; 3212. First breaking groove; 3213. Second conveying and extruding screw section; 322. Discharge screw section; 3221. Second breaking groove; 40. Feeding mechanism; 410. Vibrating bucket; 420. Upper material level meter; 430. Fixed bucket; 440. Lower material level meter. DETAILED DESCRIPTION

[0037] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] Please see the attached Figure 1-7In one embodiment of the present invention, a raw material pre-extrusion device for preparing activated carbon includes a bottom bracket 10, a driving mechanism 20, and an extrusion conveying mechanism 30. The extrusion conveying mechanism 30 is fixedly arranged on the top of the bottom bracket 10, wherein:

[0042] The extrusion conveying mechanism 30 includes a barrel assembly 310 fixed on the bottom bracket 10 and a screw rod 320 rotatably mounted in the barrel assembly 310; wherein,

[0043] The barrel assembly 310 includes a first barrel 311 and a second barrel 312 connected to each other; wherein,

[0044] The first cylinder 311 is provided with a cylinder feed port (not shown) at one end away from the second cylinder 312;

[0045] The second cylinder 312 includes an extrusion cylinder section 3121 and a discharge cylinder section 3123. The extrusion cylinder section 3121 is connected to the first cylinder 311. The discharge cylinder section 3123 is connected to the end of the extrusion cylinder section 3121 away from the first cylinder 311. The inner diameter of the extrusion cylinder section 3121 gradually decreases from the first cylinder 311 toward the discharge cylinder section 3123. The discharge cylinder section 3123 is provided with a discharge port 3124 for discharging the raw material from the extrusion cylinder section 3121.

[0046] It should be noted that the extrusion barrel section 3121 is the primary area for material extrusion. The inner diameter of the extrusion barrel section 3121 directly affects the density of the pre-extruded material and the smoothness of material discharge. In a preferred embodiment, the inner wall of the extrusion barrel section 3121 is a conical surface, with a taper angle α set between 70° and 85°, preferably 73° to 83°, and even more preferably 75° to 80°.

[0047] The screw rod 320 includes a conveying and extruding screw segment 321 and a discharge screw segment 322 that are connected to each other. The conveying direction of the conveying and extruding screw segment 321 is consistent with the conveying direction of the discharge screw segment 322. The conveying and extruding screw segment 321 is rotatably mounted in the first barrel 311, and the discharge screw segment 322 is rotatably mounted in the second barrel 312. The length of the conveying and extruding screw segment 321 is greater than the length of the discharge screw segment 322.

[0048] The driving mechanism 20 is used to drive the screw rod 320 to rotate in the barrel assembly 310 , so as to squeeze and transport the raw materials from the barrel feed port along the extension direction of the barrel assembly 310 and discharge them from the discharge port 3124 .

[0049] During operation, the material first enters the first barrel 311 through the barrel feed port, and the driving mechanism 20 drives the conveying and extruding screw segment 321 to rotate, and while conveying the material, it extrude the material together with the inner wall of the first barrel 311. As the conveying and extruding screw segment 321 conveys the material, it enters the extrusion barrel segment 3121 of the second barrel 312. Since the diameter of the inner wall surface of the extrusion barrel segment 3121 gradually decreases from the first barrel 311 toward the discharge barrel segment 3123, the material is fully extruded at this time, and the fully extruded material is discharged. The material is conveyed by the screw segment 322 and enters the discharge barrel segment 3123, and then discharged through the discharge port 3124. The whole process can realize continuous production. The barrel assembly 310 and the screw rod 320 are coordinated in sections, and the material is initially extruded by the cooperation between the conveying and extrusion segment 321 and the first barrel 311. Then, the material is further fully extruded by the extrusion barrel segment 3121 and the discharge screw segment 322, and the gas in the material is fully squeezed out. It can also ensure that the material is smoothly conveyed and discharged, thereby improving the quality and processing efficiency of the activated carbon.

[0050] As a preferred embodiment, a feeding mechanism 40 is further included above the extrusion conveying mechanism 30. The feeding mechanism 40 includes a vibrating hopper 410 and a fixed hopper 430 located below the vibrating hopper 410. The fixed hopper 430 is fixed to the top of the first cylinder 311. The discharge port of the vibrating hopper 410 is connected to the feed port of the fixed hopper 430, and the discharge port of the fixed hopper 430 is connected to the feed port of the cylinder. By configuring the feeding mechanism 40 in the form of the vibrating hopper 410 and the fixed hopper 430, the vibrating hopper 410 can activate the material, effectively eliminating the problems of material bulging, clogging, and silo sticking, thus solving the problem of difficult silo discharge.

[0051] As a preferred embodiment, the inner wall of the extrusion barrel section 3121 is formed with a spiral groove 3122 extending along the length of the extrusion barrel section 3121. The rotation direction of the spiral groove 3122 is opposite to that of the discharge screw section 322, and the pitch of the spiral groove 3122 is less than or equal to the pitch of the discharge screw section 322. To ensure smooth material conveying and prevent material blockage, the spiral groove 3122 is formed on the inner wall of the extrusion barrel section 3121. The rotation direction of the spiral groove 3122 is opposite to that of the screw 320, and the pitch of the spiral groove 3122 is less than or equal to the screw pitch. This increases friction between the barrel wall and the material, prevents the material from slipping on the barrel wall, and thereby improves the material conveying and extrusion capacity.

[0052] Furthermore, a cylinder cover (not shown) may be provided on one side of the first cylinder 311 close to the second cylinder 312. The cylinder cover adopts a flip-up structure and is fixed to the first cylinder 311 by bolts, so that blocked materials can be inspected and cleaned.

[0053] As another preferred embodiment, the conveying and extruding screw segment 321 includes a first conveying and extruding screw segment 3211 and a second conveying and extruding screw segment 3213, the first conveying and extruding screw segment 3211 is connected between the unloading screw segment 322 and the second conveying and extruding screw segment 3213, and each circle of spiral blades on the first conveying and extruding screw segment 3211 is spaced apart by two first breaking grooves 3212; and / or, each circle of spiral blades on the unloading screw segment 322 is spaced apart by two second breaking grooves 3221.

[0054] Those skilled in the art should know that, within the conveying and extrusion screw section 321, the purpose of the setting of interrupted spiral blades is to relieve the pressure of the material after excessive extrusion. When the front end of the material is blocked, the material will be over-pressurized during continuous spiral conveying. The material will be subjected to too much force and will be too compact, which will lead to problems such as equipment overload. Interrupting the spiral structure can relieve the pressure of the material at the discontinuity, and at the same time can have a certain breaking effect on the dense material, thereby improving the conveying and extrusion capabilities.

[0055] In the discharge screw section 322, all the spiral blades of the discharge screw section 322 are interrupted, so that the compacted material can be broken into smaller pieces, which is more conducive to the discharge of the extruded material.

[0056] As a specific embodiment, the conveying and extruding screw segment 321 includes a first conveying and extruding screw segment 3211 and a second conveying and extruding screw segment 3213. The first conveying and extruding screw segment 3211 is connected between the discharge screw segment 322 and the second conveying and extruding screw segment 3213. Each spiral blade of the first conveying and extruding screw segment 3211 is provided with two first interruption grooves 3212 at intervals.

[0057] Moreover, two second interruption grooves 3221 are arranged at intervals between each circle of spiral blades on the unloading screw segment 322; wherein, the groove width of the first interruption groove 3212 gradually increases from the groove bottom to the groove top, and the angle between the two first interruption grooves 3212 in the cross section is set at 90~180°; the groove width of the second interruption groove 3221 gradually increases from the groove bottom to the groove top, and the angle between the two second interruption grooves 3221 in the cross section is set at 90~180°.

[0058] Furthermore, corresponding to the first conveying extrusion screw segment 3211, the interruption angle β1 is 15~40°, preferably 20~35°, and optimally 28~32°. The interruption interval angle β2 ranges from 90~180°, preferably 110~160°, and more optimally 125~145°; corresponding to the unloading screw segment 322, the interruption angle θ1 is 20~35°, preferably 22~30°, and optimally 24~26°. The interruption interval angle β2 ranges from 90~180°, preferably 100~150°, and more optimally 110~135°.

[0059] As another preferred embodiment, the conveying and extruding screw segment 321 and the discharge screw segment 322 are both anisotropic spiral structures, and the pitch of the conveying and extruding screw segment 321 gradually increases from the conveying starting point to the conveying end point, and the pitch of the discharge screw segment 322 gradually increases from the conveying starting point to the conveying end point. It is worth noting for those skilled in the art that, in order to improve the extrusion ability of the screw rod 320 on the material, the conveying and extruding screw segment 321 and the discharge screw segment 322 in this embodiment are both anisotropic spiral structures, and the pitch value gradually increases along the conveying direction. Preferably, the pitch value corresponding to the conveying end point position is 1.1 to 1.3 times the pitch value corresponding to the conveying starting point position. Furthermore, in order to increase the extrusion speed, the screw rod 320 can be set to a semi-helical structure, and the pitch is also gradually increased. As the pitch increases, the flow area of the material can be increased, thereby reducing material obstruction.

[0060] In a preferred embodiment, the inner diameter of the conveying and extruding screw segment 321 is consistent with the outer diameter of the unloading screw segment 322, and the length of the unloading screw segment 322 is consistent with the length of the unloading barrel segment 3123, and unloading is performed through the joint action of the unloading screw segment 322 and the conveying and extruding screw segment 321.

[0061] Furthermore, the extrusion barrel section 3121 and the discharge barrel section 3123 are detachably connected. A first bearing seat (not shown) for the rotation of the discharge screw section 322 is mounted on the end of the discharge barrel section 3123 away from the first barrel 311. A second bearing seat (not shown) for the rotation of the conveying extrusion screw section 321 is mounted on the end of the first barrel 311 away from the second barrel 312. By providing a detachable connection between the extrusion barrel section 3121 and the discharge barrel section 3123, for example, by means of a screw connection, this arrangement facilitates manufacturing, as well as disassembly and assembly.

[0062] As a preferred embodiment, the vibrating bucket 410 is equipped with an upper level meter 420 for detecting the material level in the vibrating bucket 410 , and the fixed bucket 430 is equipped with a lower level meter 440 near the barrel feed port for detecting whether there is material at the lower end of the fixed bucket 430 . It is worth noting that in this embodiment, a material level monitoring sensor is set in the feeding mechanism 40, including the upper material level meter 420 and the lower material level meter 440. Preferably, the upper material level meter 420 adopts a capacitive material level sensor, and the lower material level meter 440 adopts a rotary resistance sensor, wherein the probe of the capacitive sensor is inserted into the vibrating bucket 410 to detect the material level of the vibrating bucket 410; the rotary resistance sensor is installed on the lower side of the fixed bucket 430 and close to the feed port of the cylinder. The probe of the rotary resistance sensor is a rotating blade. When it does not contact the material, the rotating motor maintains normal operation. When the blade contacts the material, the motor will reduce speed or stop rotating. Because the material has a certain viscosity and the fluidity is not good enough, there is a certain amount of blockage. The lower material level meter 440 can sense whether there is an empty space at the lower end of the fixed bucket 430, and then judge whether there is blockage under normal material level conditions, to provide production guidance. Both sensors are technical equipment well known to those skilled in the art, so they will not be described in detail.

[0063] In order to better pre-extrude the material, this equipment can be used in conjunction with the following control methods: The characteristic of the screw extrusion equipment is to keep the operating parameters as stable as possible during operation. If there is too much material, it is easy to accumulate in the feed hopper and cause blockage. If there is too little material, the pre-extrusion effect is not obvious. Therefore, the material incoming situation can be monitored in the feed mechanism 40. If the material level decreases, the speed is gradually reduced through the frequency converter. If the material level rises too quickly, the speed of the screw rod 320 is increased. When the material level of the feed mechanism 40 is monitored to be normal or rising but there is no material at the lower end of the feed hopper, the blockage problem can be eliminated by a vibrator. On the other hand, due to the characteristics of the material, it is easy for the material to get stuck in the spiral and rotate with the spiral, resulting in no material being squeezed out. This problem can be judged by monitoring the motor power or current. When the material rotates with the spiral and does not discharge, the motor power consumption will be greatly reduced. By monitoring the motor power and current, the problem of material jamming during operation can be accurately judged to guide production.

[0064] The material after pre-extrusion treatment is more conducive to the subsequent granulation process and produces high-quality activated carbon.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A raw material pre-extrusion equipment for preparing activated carbon, characterized in that: It includes a bottom bracket, a driving mechanism and an extrusion conveying mechanism, wherein the extrusion conveying mechanism is fixed on the top of the bottom bracket, The extrusion conveying mechanism includes a barrel assembly fixedly mounted on the bottom bracket and a screw rod rotatably mounted in the barrel assembly; wherein, The cylinder assembly includes a first cylinder and a second cylinder connected to each other; wherein, The first cylinder is provided with a cylinder feed port at one end away from the second cylinder; The second cylinder includes an extrusion cylinder section and a discharge cylinder section, the extrusion cylinder section is connected to the first cylinder, the discharge cylinder section is connected to the end of the extrusion cylinder section away from the first cylinder, the inner diameter of the extrusion cylinder section gradually decreases from the first cylinder toward the discharge cylinder section, and the discharge cylinder section is provided with a discharge port for discharging raw materials from the extrusion cylinder section; The screw rod includes a conveying and extruding screw segment and a discharge screw segment connected to each other, the conveying direction of the conveying and extruding screw segment is consistent with the conveying direction of the discharge screw segment; the conveying and extruding screw segment is rotatably mounted in the first barrel, and the discharge screw segment is rotatably mounted in the second barrel, and the length of the conveying and extruding screw segment is greater than the length of the discharge screw segment; The driving mechanism is used to drive the screw to rotate in the barrel assembly, squeeze and convey the raw materials from the barrel feed port along the extension direction of the barrel assembly, and discharge them from the discharge port; The conveying and extruding screw segment includes a first conveying and extruding screw segment and a second conveying and extruding screw segment. The first conveying and extruding screw segment is connected between the unloading screw segment and the second conveying and extruding screw segment. Two first breaking grooves are arranged at intervals between each circle of spiral blades on the first conveying and extruding screw segment; two second breaking grooves are arranged at intervals between each circle of spiral blades on the unloading screw segment.

2. The raw material pre-extrusion equipment for preparing activated carbon according to claim 1, characterized in that: It also includes a feeding mechanism located above the extrusion and conveying mechanism, the feeding mechanism includes a vibrating bucket and a fixed bucket located below the vibrating bucket, the fixed bucket is fixed to the top of the first cylinder, the discharge port of the vibrating bucket is connected to the feed port of the fixed bucket, and the discharge port of the fixed bucket is connected to the feed port of the cylinder.

3. The raw material pre-extrusion equipment for preparing activated carbon according to claim 1, characterized in that: The inner wall of the extrusion barrel section is formed with a spiral groove extending along the length direction of the extrusion barrel section, the rotation direction of the spiral groove is opposite to the rotation direction of the discharge screw section, and the pitch of the spiral groove is less than or equal to the pitch of the discharge screw section.

4. The raw material pre-extrusion equipment for preparing activated carbon according to claim 3, characterized in that: The inner wall of the extrusion cylinder section is a conical surface, and the taper of the conical surface is set between 70° and 85°.

5. The raw material pre-extrusion equipment for preparing activated carbon according to claim 1, characterized in that: The extrusion barrel section and the discharge barrel section are detachably connected. The discharge barrel section is provided with a first bearing seat for rotating the discharge screw section at one end away from the first barrel, and the first barrel is provided with a second bearing seat for rotating the conveying extrusion screw section at one end away from the second barrel.

6. The raw material pre-extrusion equipment for preparing activated carbon according to claim 2, characterized in that: The vibrating bucket is equipped with an upper level meter for detecting the material level in the vibrating bucket, and the fixed bucket is equipped with a lower level meter near the cylinder feed port for detecting whether there is material at the lower end of the fixed bucket.

7. The raw material pre-extrusion equipment for preparing activated carbon according to claim 1, characterized in that: The width of the first interrupted groove gradually increases from the bottom of the groove to the top of the groove, and the angle between the two first interrupted grooves in the cross section is set at 90~180°; the width of the second interrupted groove gradually increases from the bottom of the groove to the top of the groove, and the angle between the two second interrupted grooves in the cross section is set at 90~180°.

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