Raw material pretreatment device for kraft paper production

Abstract

A raw material pretreatment device for kraft paper production relates to the technical field of papermaking equipment, and is characterized in that a feed hopper is connected to the left side of the upper end of a ring wall of a conveying cylinder in a penetrating manner, and a transfer motor is fixed to the left side wall of the conveying cylinder through a bracket; a rotating shaft is connected to an output shaft of the conveying motor, and spiral stirring blades are arranged on the rotating shaft; the adsorption mechanism is arranged in the conveying cylinder; the collecting mechanism is arranged on the bottom left side of the conveying cylinder; the crushing mechanism is arranged on the right side of the conveying cylinder; the dedusting mechanism is connected with the crushing mechanism; the conveying mechanism is connected with the crushing mechanism; the hydrapulper is arranged at the bottom of the conveying mechanism; the hydrapulper is connected with an external power supply; raw material conveying and metal impurity adsorption are synchronously carried out, metal impurities are automatically cleaned, and the production and sorting efficiency is improved; uniform raw material crushing granularity is ensured, and large particles are prevented from influencing the subsequent pulping quality; dust is effectively collected, environmental pollution is reduced, and meanwhile the filter bag is convenient to clean due to the detachable design.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking equipment, and in particular to a raw material pretreatment device for producing kraft paper. Background Art

[0002] In the traditional kraft paper production process, raw materials (such as waste paper and pulp) are often mixed with metal impurities, pebbles and other foreign matter. Existing equipment mostly uses single magnetic separation or manual sorting, which is inefficient and prone to omissions. The pulverization process is prone to damage to the blades due to metal impurities, increasing maintenance costs. The separation design of the screening and dust removal systems leads to dust pollution and raw material waste. Therefore, a raw material pretreatment device for kraft paper production is proposed. Summary of the Invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the existing technology and provide a raw material pretreatment device for kraft paper production, which can realize the simultaneous conveying of raw materials and the adsorption of metal impurities, automatically clean up metal impurities, and improve production and sorting efficiency; ensure that the raw material is crushed to a uniform particle size to avoid large particles affecting the quality of subsequent pulping; effectively collect dust and reduce environmental pollution. At the same time, the filter bag is detachable for easy cleaning.

[0004] To achieve the above-mentioned object, the present invention adopts the following technical solution: it comprises a conveying drum, a feed hopper, a transfer motor, a rotating shaft and a spiral stirring blade; the feed hopper is connected to the left side of the upper end of the annular wall of the conveying drum, the transfer motor is fixed to the left side wall of the conveying drum via a bracket, and the conveying motor is connected to an external power supply; the output shaft of the conveying motor is connected to the rotating shaft, and the rotating shaft passes through the left side wall of the conveying drum through a bearing and is arranged in the conveying drum; the rotating shaft is provided with a spiral stirring blade; It also contains: Adsorption mechanism, the adsorption mechanism is arranged in the conveying cylinder; A collecting mechanism, the collecting mechanism being arranged on the left side of the bottom of the conveying cylinder; A crushing mechanism, the crushing mechanism is arranged on the right side of the conveying cylinder; A dust removal mechanism connected to the crushing mechanism; A transport mechanism connected to the crushing mechanism; A hydraulic pulper is provided at the bottom of the transport mechanism; the hydraulic pulper is connected to an external power supply; Through the above technical solution design, the material is fed from the feed hopper, the conveying motor is started, the spiral stirring blade rotates, and the raw material is driven to move right. The adsorption mechanism absorbs the metal impurities therein, and after a period of time, the metal impurities are collected by the collection mechanism; the raw material moves to the right and is crushed by the crushing mechanism, and the dust removal mechanism absorbs the dust. The crushed raw material is moved out to the hydraulic pulper through the transportation mechanism for pulping and then moved to the next process.

[0005] Preferably, the adsorption mechanism comprises: Magnetic strips, the number of which is several and which are respectively distributed in an annular shape and movably inserted on the left side wall of the conveying cylinder; A fixing ring fixed to the left ends of the plurality of magnetic strips; A connecting rod, which is fixed to the fixing ring and has an L-shaped structure; A movable internally threaded tube, wherein the movable internally threaded tube is fixed to the right end of the connecting rod; A movable screw rod, wherein the movable screw rod is screwed and inserted into the right end of the movable internal threaded tube through a threaded connection; A mobile motor, wherein the mobile motor is fixed on the annular wall of the conveying cylinder and is connected to an external power supply; Through the above technical solution design, when the raw materials move in the conveyor barrel, the metal impurities in the raw materials are absorbed by the magnetic strips; the moving motor is started regularly, the moving screw rotates to drive the moving internal threaded tube to move, so that the fixed ring drives the magnetic strips to move out, and in the process of the magnetic strips moving out, the metal impurities fall.

[0006] Preferably, a scraper is provided on the peripheral wall of the magnetic strip, and the scraper is fixed on the left inner wall of the conveying cylinder; Through the above technical solution design, metal impurities can fall off better under the action of the scraper.

[0007] Preferably, the collecting mechanism comprises: The movable arc rod is a semicircular arc structure, and the movable arc rod is embedded in the lower side of the left end of the ring wall of the conveying cylinder; An opening and closing motor is fixed to the front side of the left wall of the conveying cylinder through a bracket, and the opening and closing motor is connected to an external power supply; the output shaft of the opening and closing motor passes through the conveying cylinder and is connected to the movable arc rod; The collecting box is arranged under the movable arc rod, and the bottom of the collecting box is embedded in the collecting rack, and the collecting rack is fixed to the conveying cylinder through the rod; Through the above technical solution design, the opening and closing motor is started to rotate the movable arc rod, leaking the bottom of the conveying cylinder, so that the scraped metal impurities fall into the collection box.

[0008] Preferably, the pulverizing mechanism comprises: A crushing cylinder, the crushing cylinder is connected to the right end of the conveying cylinder; A pulverizing motor, which is fixed to the right side wall of the pulverizing barrel via a bracket and is connected to an external power source; The turntable is arranged in the grinding cylinder, and the turntable is connected to the output shaft of the grinding motor after passing through the grinding cylinder through the shaft; the right end of the shaft is embedded in the turntable through the bearing; Crushing blades, the number of which is several and distributed in an annular shape on the ring wall of the turntable; The No. 1 connecting box is connected to the bottom of the crushing cylinder through the No. 1 connecting box; the dust removal mechanism is arranged on the left side wall of the No. 1 connecting box; A No. 1 connecting pipe, the No. 1 connecting pipe is connected to the No. 1 connecting box and the bottom of the No. 1 connecting box; A second connecting pipe, the second connecting pipe being connected to the front side of the bottom of the ring wall of the first connecting pipe; the second connecting pipe being connected to the transport mechanism; Through the above technical solution design, the raw materials are moved to the right by the spiral stirring blades into the crushing barrel, and the crushing motor is started to rotate the turntable, driving the crushing blades to rotate and crush the raw materials; the crushed raw materials fall and are sprayed out through the No. 1 connecting box, No. 1 connecting pipe and No. 2 connecting pipe.

[0009] Preferably, the crushing cylinder has a built-in screen, which is arranged at the bottom of the crushing blade; a door body is provided at the bottom of the right side wall of the crushing cylinder; Through the above technical solution design, smaller raw materials fall through the screen, and larger raw materials will continue to be cut.

[0010] Preferably, a filter screen is provided in the No. 1 connecting pipe, a collecting pipe is screwed to the bottom of the No. 1 connecting pipe through a thread, and the No. 2 connecting pipe is provided in front of the filter screen; Through the above technical solution design, the pebbles filtered in the filter screen fall into the collection pipe.

[0011] Preferably, the dust removal mechanism comprises: No. 2 connection box, the No. 2 connection box is connected to the left side wall of the No. 1 connection box; a No. 2 door is provided on the left side wall of the No. 2 connection box; A fan is provided at the bottom of the No. 2 connection box and is connected to the No. 2 connection box through a pipeline; A connection frame is provided in the second connection box, and slide bars are fixed on the front and rear side walls of the connection frame, and slide rails are fixed on the front and rear inner side walls of the second connection frame, and the slide bars slide in the slide rails; A filter pocket, wherein the filter pocket is fixed on the connecting frame; Through the above technical solution design, the fan is started, and the dust generated when the raw materials fall is sucked away and filtered through the filter bag in the No. 2 connecting box; after a certain period of use, the No. 2 door is opened to pull out the connecting frame and clean the filter bag.

[0012] Preferably, the transportation mechanism comprises: A conveyor, the conveyor being arranged above the second connecting pipe and connected to an external power source; The outer box is fixedly sleeved with the second connecting pipe; the upper side of the conveyor belt of the conveyor is embedded in the bottom of the outer box, and the conveyor is fixed to the bottom of the outer box through a frame; an outlet is opened on the right side of the bottom of the outer box; the outer box and the conveyor are arranged from left to right in an inclined manner from low to high; the hydraulic pulper is arranged below the outlet; Support rods, there are two support rods, and they are fixed on the left and right sides of the bottom of the outer box respectively; There are two limit frames, each of which is fixed on the annular wall of the hydraulic pulper and fixed on the bottom of the support rod; Through the above technical solution, the raw materials ejected through the No. 2 connecting pipe fall onto the conveyor, and the conveyor is started, so that the raw materials are transported to the hydraulic pulper for pulping.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Equipped with an adsorption mechanism to achieve simultaneous raw material transportation and metal impurity adsorption, thereby improving sorting efficiency; 2. Equipped with a crushing mechanism to ensure that the raw materials are crushed into uniform particle size to avoid large particles affecting the quality of subsequent pulping; 3. Equipped with dust removal mechanism to effectively collect dust and reduce environmental pollution. At the same time, the filter bag is detachable for easy cleaning; 4. Equipped with a collection mechanism, the mobile motor drives the magnetic strip to move out and cooperates with the scraper to automatically clean metal impurities to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 It is a southwest isometric view of the present invention.

[0016] Figure 3 yes Figure 2 Enlarged view of part A in .

[0017] Figure 4 It is a southeast isometric view of the present invention.

[0018] Figure 5 yes Figure 4 Enlarged view of part B in .

[0019] Figure 6 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 7 yes Figure 6 Enlarged view of part C in .

[0021] Figure 8 yes Figure 6 Enlarged view of part D in .

[0022] Description of reference numerals: Conveyor drum 1, feed hopper 2, transfer motor 3, rotating shaft 4, spiral stirring blade 5, adsorption mechanism 6, magnetic strip 6-1, scraper 6-2, fixed ring 6-3, connecting rod 6-4, movable internal threaded tube 6-5, movable screw 6-6, movable motor 6-7, collecting mechanism 7, movable arc rod 7-1, opening and closing motor 7-2, collecting box 7-3, collecting rack 7-4, crushing mechanism 8, crushing drum 8-1, crushing motor 8-2, turntable 8-3, crushing blade 8-4, screen 8 -5, door body No. 1 8-6, connecting box No. 1 8-7, connecting pipe No. 1 8-8, filter screen 8-9, collecting pipe 8-10, connecting pipe No. 2 8-11, dust removal mechanism 9, connecting box No. 2 9-1, door body No. 2 9-2, fan 9-3, connecting frame 9-4, slide bar 9-5, slide rail 9-6, filter bag 9-7, transport mechanism 10, conveyor 10-1, outer box 10-2, outlet 10-3, support rod 10-4, limit frame 10-5, hydraulic pulper 11. DETAILED DESCRIPTION

[0023] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments described are only used as examples. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0024] This specific implementation adopts the following technical solutions: Example 1

[0025] See also Figure 1 , this embodiment 1 includes a conveying drum 1, a feed hopper 2, a transfer motor 3, a rotating shaft 4 and a spiral stirring blade 5; the feed hopper 1 is connected to the left side of the upper end of the ring wall of the conveying drum 1, and the transfer motor 2 is fixed to the left side wall of the conveying drum 1 through a bracket. The conveying motor 2 is connected to an external power supply. The specific model of the conveying motor 2 is directly purchased and installed on the market according to actual use requirements; the output shaft of the conveying motor 2 is connected to the rotating shaft 3, and the rotating shaft 3 passes through the left side wall of the conveying drum 1 through a bearing and is arranged in the conveying drum 1; the rotating shaft 3 is provided with a spiral stirring blade 4; It also contains: Adsorption mechanism 5, the adsorption mechanism 5 is arranged in the conveying cylinder 1; The collecting mechanism 7 is provided at the bottom left side of the conveying cylinder 1; A crushing mechanism 8 is provided on the right side of the conveying cylinder 1; A dust removal mechanism 9, wherein the dust removal mechanism 9 is connected to the crushing mechanism 8; The transport mechanism 10 is connected to the crushing mechanism 8; The hydraulic pulper 11 is arranged at the bottom of the transport mechanism 10; the hydraulic pulper 11 is connected to an external power supply, and the specific model of the hydraulic pulper 11 is purchased and installed directly from the market according to actual use requirements. Example 2

[0026] See also Figure 2 、 3 , 6, 7, based on Example 1, the adsorption mechanism 5 includes: Magnetic strips 6-1, the number of which is several and which are respectively arranged in an annular shape and movably inserted on the left side wall of the conveying cylinder 1; scrapers 6-2 are respectively provided on the peripheral walls of the magnetic strips 6-1, and the scrapers 6-2 are fixed on the left inner wall of the conveying cylinder 1; A fixing ring 6-3, wherein the fixing ring 6-3 is fixed to the left end of the plurality of magnetic strips 6-1; Connecting rod 6-4, the connecting rod 6-4 is fixed on the fixing ring 6-3, and the connecting rod 6-4 is arranged in an "L" shape; A movable internal threaded tube 6-5, wherein the movable internal threaded tube 6-5 is fixed to the right end of the connecting rod 6-4; A movable screw rod 6-6 is screwed and inserted into the right end of the movable internal threaded tube 6-5 through a threaded connection; The mobile motor 6-7 is fixed to the annular wall of the conveying cylinder 1 by bolts. The mobile motor 6-7 is connected to an external power supply. The specific model of the mobile motor 6-7 is purchased, installed and used directly from the market according to actual use requirements. Example 3

[0027] See also Figure 2 、 6 On the basis of Example 2, the collecting mechanism 7 comprises: The movable arc rod 7-1 is a semicircular arc structure, and the movable arc rod 7-1 is embedded in the lower side of the left end of the ring wall of the conveying cylinder 1; The opening and closing motor 7-2 is fixed to the front side of the left wall of the conveying cylinder 1 through a bracket. The opening and closing motor 7-2 is connected to an external power supply. The specific model of the opening and closing motor 7-2 is purchased and installed directly from the market according to actual use requirements. The output shaft of the opening and closing motor 7-2 passes through the conveying cylinder 1 and is connected to the movable arc rod 7-1. The collecting box 7-3 is arranged below the movable arc rod 7-1, and the bottom of the collecting box 7-3 is embedded in the collecting rack 7-4, and the collecting rack 7-4 is fixed to the conveying cylinder 1 through a rod. Example 4

[0028] See also Figure 2、 4 6. Based on Example 1, the crushing mechanism 8 includes: The crushing cylinder 8-1 is connected to the right end of the conveying cylinder 1; Crushing motor 8-2, the crushing motor 8-2 is fixed to the right side wall of the crushing cylinder 8-1 through a bracket, the crushing motor 8-2 is connected to an external power supply, and the specific model of the crushing motor 8-2 is directly purchased and installed from the market according to actual use requirements; The turntable 8-3 is arranged in the grinding cylinder 8-1. The turntable 8-3 is connected to the output shaft of the grinding motor 8-2 after passing through the grinding cylinder 8-1 through the shaft; the right end of the rotating shaft 3 is embedded in the turntable 8-3 through the bearing; Crushing blades 8-4, the number of which is several and distributed in an annular shape on the annular wall of the turntable 8-3; a screen 8-5 is built into the crushing cylinder 8-1, and the screen 8-5 is provided at the bottom of the crushing blades 8-4; a first door 8-6 is provided at the bottom of the right side wall of the crushing cylinder 8-1; The first connecting box 8-7 is connected to the bottom of the crushing cylinder 8-1; the dust removal mechanism 9 is provided on the left side wall of the first connecting box 8-7; The No. 1 connecting pipe 8-8 is connected to the No. 1 connecting box 8-7 and the bottom of the No. 1 connecting box 8-7 through a through-hole; a filter screen 8-9 is provided in the No. 1 connecting pipe 8-8, and a collecting pipe 8-10 is screwed to the bottom of the No. 1 connecting pipe 8-8 through a thread; The No. 2 connecting pipe 8-11 is connected through the front side of the bottom of the ring wall of the No. 1 connecting pipe 8-8, and the No. 2 connecting pipe 8-11 is arranged on the front side of the filter 8-9; the No. 2 connecting pipe 8-11 is connected to the transportation mechanism 10. Example 5

[0029] See also Figure 2 、 6 8. Based on Example 4, the dust removal mechanism 9 includes: No. 2 connection box 9-1, said No. 2 connection box 9-1 is connected to the left side wall of No. 1 connection box 8-7; No. 2 door 9-2 is provided on the left side wall of No. 2 connection box 9-1; The fan 9-3 is provided at the bottom of the second connection box 9-1 and is connected to the second connection box 9-1 through a pipeline; The connecting frame 9-4 is arranged in the second connecting box 9-1. Slide bars 9-5 are fixed on the front and rear side walls of the connecting frame 9-4. Slide rails 9-6 are fixed on the front and rear inner side walls of the second connecting frame 9-1. The slide bars 9-5 are slidably arranged in the slide rails 9-6. Filter bag 9-7, the filter bag 9-7 is fixed on the connecting frame 9-4. Example 6

[0030] See also Figure 2 、 4 , 5, 6, based on embodiment 4, the transport mechanism 10 includes: Conveyor 10-1, the conveyor 10-1 is arranged above the second connecting pipe 8-11, the conveyor 10-1 is connected to an external power supply, and the specific model of the conveyor 10-1 is purchased and installed directly from the market according to actual use requirements; An outer box 10-2 is sleeved and fixedly mounted on the second connecting pipe 8-11; the upper side of the conveyor belt of the conveyor 10-1 is embedded in the bottom of the outer box 10-2, and the conveyor 10-1 is fixed to the bottom of the outer box 10-2 via a frame; an outlet 10-3 is opened on the right side of the bottom of the outer box 10-2; the outer box 10-2 and the conveyor 10-1 are arranged from left to right in an inclined direction from low to high; a hydraulic pulper 11 is located below the outlet 10-3; Support rods 10-4, there are two support rods 10-4, and they are fixed to the left and right sides of the bottom of the outer box 10-2 respectively; The limiting frames 10-5 are two in number and are fixed on the annular wall of the hydraulic pulper 11 respectively. The limiting frames 10-5 are fixed on the bottom of the support rod 10-4.

[0031] When using the present invention, feed from the feed hopper 1, start the conveying motor 2, so that the spiral stirring blade 4 rotates, driving the raw material to move right, and when the raw material moves in the conveying cylinder 1, the metal impurities in the raw material are adsorbed by the magnetic strip 6-1; the raw material moves right into the crushing cylinder 8-1 through the spiral stirring blade 4, and the crushing motor 8-2 is started, so that the turntable 8-3 rotates, driving the crushing blade 8-4 to rotate, and the raw material is crushed; the crushed raw material falls, and the relatively small raw material falls through the screen 8-5, and is ejected through the No. 1 connecting box 8-7, the No. 1 connecting pipe 8-8 and the No. 2 connecting pipe 8-11, and the small stones filtered in the filter screen 8-9 fall into the collecting pipe 8-10; the fan 9-3 is started, and the dust generated when the raw material falls is sucked away and filtered through the filter bag 9-7 in the No. 2 connecting box 9-1; the raw material ejected through the No. 2 connecting pipe 8-11 falls on the conveyor 10-1, and the conveyor 10-1 is started so that the raw material is transported to the hydraulic pulper 11 for pulping treatment; After using for a certain period of time, start the moving motor 6-7 regularly, and the moving screw 6-6 rotates to drive the moving internal threaded tube 6-5 to move, so that the fixed ring 6-3 drives the magnetic strip 6-1 to move out. In the process of moving the magnetic strip 6-1 out, the metal impurities fall down under the action of the scraper 6-2, and start the opening and closing motor 7-2 to make the moving arc rod 7-1 rotate out, and the bottom of the conveying cylinder 1 leaks out, so that the scraped metal impurities fall into the collecting box 7-3, open the No. 2 door 9-2, pull out the connecting frame 9-4, and clean the filter bag 9-7.

[0032] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the cooperation of the spiral stirring blade 4 and the magnetic strip 6-1, the raw material conveying and the metal impurity adsorption are carried out simultaneously, thereby improving the sorting efficiency; 2. Use crushing blade 8-4 and screen 8-5 for grading to ensure uniform particle size of raw materials and avoid large particles affecting the quality of subsequent pulping; 3. The dust removal system composed of fan 9-3 and filter bag 9-7 effectively collects dust and reduces environmental pollution. At the same time, the filter bag 9-7 is detachable for easy cleaning. 4. The mobile motor 6-7 drives the magnetic strip 6-1 to move out and cooperates with the scraper 6-2 to automatically clean metal impurities, thereby improving production efficiency.

[0033] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A raw material pretreatment device for producing kraft paper, comprising a conveying drum (1), a feed hopper (2), a transfer motor (3), a rotating shaft (4) and a spiral stirring blade (5); the feed hopper (1) is connected to the left side of the upper end of the ring wall of the conveying drum (1); the transfer motor (2) is fixed to the left side wall of the conveying drum (1) via a bracket, and the conveying motor (2) is connected to an external power supply; the output shaft of the conveying motor (2) is connected to the rotating shaft (3), and the rotating shaft (3) is screwed through the left side wall of the conveying drum (1) through a bearing and is arranged in the conveying drum (1); the rotating shaft (3) is provided with a spiral stirring blade (4); It is characterized by: It also contains: An adsorption mechanism (5), wherein the adsorption mechanism (5) is arranged in the conveying cylinder (1); A collecting mechanism (7), the collecting mechanism (7) being arranged on the left side of the bottom of the conveying cylinder (1); A crushing mechanism (8), wherein the crushing mechanism (8) is arranged on the right side of the conveying cylinder (1); A dust removal mechanism (9), wherein the dust removal mechanism (9) is connected to the crushing mechanism (8); A transport mechanism (10), wherein the transport mechanism (10) is connected to the crushing mechanism (8); A hydraulic pulper (11), wherein the hydraulic pulper (11) is arranged at the bottom of the transport mechanism (10); the hydraulic pulper (11) is connected to an external power supply.

2. The raw material pretreatment device for producing kraft paper according to claim 1, characterized in that: The adsorption mechanism (5) comprises: Magnetic strips (6-1), the number of the magnetic strips (6-1) is several, and they are respectively distributed in an annular shape and movably inserted on the left side wall of the conveying cylinder (1); A fixing ring (6-3), wherein the fixing ring (6-3) is fixed to the left ends of the plurality of magnetic strips (6-1); A connecting rod (6-4), wherein the connecting rod (6-4) is fixed on the fixing ring (6-3), and the connecting rod (6-4) is arranged in an "L"-shaped structure; A movable internal threaded tube (6-5), wherein the movable internal threaded tube (6-5) is fixed to the right end of the connecting rod (6-4); A movable screw rod (6-6), wherein the movable screw rod (6-6) is inserted into the right end of the movable internal threaded tube (6-5) through a threaded connection; A mobile motor (6-7) is fixed on the annular wall of the conveying cylinder (1), and the mobile motor (6-7) is connected to an external power supply.

3. The raw material pretreatment device for producing kraft paper according to claim 2, characterized in that: A scraper (6-2) is provided on the peripheral wall of the magnetic strip (6-1), and the scraper (6-2) is fixed on the left inner wall of the conveying cylinder (1).

4. The raw material pretreatment device for producing kraft paper according to claim 2, characterized in that: The collecting mechanism (7) comprises: A movable arc rod (7-1), wherein the movable arc plate (7-1) is arranged in a semicircular arc structure, and the movable arc rod (7-1) is embedded in the lower side of the left end of the ring wall of the conveying cylinder (1); An opening and closing motor (7-2), wherein the opening and closing motor (7-2) is fixed to the front side of the left side wall of the conveying cylinder (1) via a bracket, and the opening and closing motor (7-2) is connected to an external power supply; an output shaft of the opening and closing motor (7-2) passes through the conveying cylinder (1) and is connected to the movable arc rod (7-1); The collecting box (7-3) is arranged below the movable arc rod (7-1), and the bottom of the collecting box (7-3) is embedded in the collecting rack (7-4), and the collecting rack (7-4) is fixed to the conveying cylinder (1) through the rod.

5. The raw material pretreatment device for producing kraft paper according to claim 1, characterized in that: The crushing mechanism (8) comprises: A crushing cylinder (8-1), wherein the crushing cylinder (8-1) is connected to the right end of the conveying cylinder (1); A pulverizing motor (8-2), wherein the pulverizing motor (8-2) is fixed to the right side wall of the pulverizing cylinder (8-1) via a bracket, and the pulverizing motor (8-2) is connected to an external power supply; A turntable (8-3) is provided in the grinding cylinder (8-1), and the turntable (8-3) is connected to the output shaft of the grinding motor (8-2) after passing through the grinding cylinder (8-1) via a shaft; the right end of the rotating shaft (3) is embedded in the turntable (8-3) via a bearing; Crushing blades (8-4), the number of the crushing blades (8-4) is several and they are respectively distributed in an annular shape on the ring wall of the rotating disk (8-3); A No. 1 connecting box (8-7), the No. 1 connecting box (8-7) is connected to the bottom of the crushing cylinder (8-1); a dust removal mechanism (9) is provided on the left side wall of the No. 1 connecting box (8-7); A No. 1 connecting pipe (8-8), the No. 1 connecting pipe (8-8) is connected to the No. 1 connecting box (8-7) and the bottom of the No. 1 connecting box (8-7); The second connecting pipe (8-11) is connected to the front side of the bottom of the ring wall of the first connecting pipe (8-8) through the second connecting pipe (8-11); the second connecting pipe (8-11) is connected to the transport mechanism (10).

6. The raw material pretreatment device for producing kraft paper according to claim 5, characterized in that: The crushing cylinder (8-1) has a built-in screen (8-5), and the screen (8-5) is arranged at the bottom of the crushing blade (8-4); and a first door (8-6) is provided at the bottom of the right side wall of the crushing cylinder (8-1).

7. The raw material pretreatment device for producing kraft paper according to claim 5, characterized in that: A filter screen (8-9) is provided in the No. 1 connecting pipe (8-8), a collecting pipe (8-10) is screwed to the bottom of the No. 1 connecting pipe (8-8) via a thread, and the No. 2 connecting pipe (8-11) is provided in front of the filter screen (8-9).

8. The raw material pretreatment device for producing kraft paper according to claim 5, characterized in that: The dust removal mechanism (9) comprises: A second connection box (9-1), the second connection box (9-1) being connected through the left side wall of the first connection box (8-7); a second door body (9-2) is provided on the left side wall of the second connection box (9-1); A fan (9-3), the fan (9-3) is arranged at the bottom of the No. 2 connection box (9-1) and is connected to the No. 2 connection box (9-1) through a pipeline; A connection frame (9-4), the connection frame (9-4) being arranged in the second connection box (9-1), the front and rear side walls of the connection frame (9-4) being fixed with slide bars (9-5), the front and rear inner side walls of the second connection frame (9-1) being fixed with slide rails (9-6), the slide bars (9-5) being slidably arranged in the slide rails (9-6); A filter pocket (9-7) is fixed on the connecting frame (9-4).

9. The raw material pretreatment device for producing kraft paper according to claim 5, characterized in that: The transport mechanism (10) comprises: A conveyor (10-1), the conveyor (10-1) being located above the second connecting pipe (8-11), and the conveyor (10-1) being connected to an external power source; An outer box (10-2), wherein the outer box (10-2) and the second connecting pipe (8-11) are sleeved and fixed; the upper side of the conveyor belt of the conveyor (10-1) is embedded in the bottom of the outer box (10-2), and the conveyor (10-1) is fixed to the bottom of the outer box (10-2) through a frame; an outlet (10-3) is opened on the right side of the bottom of the outer box (10-2); the outer box (10-2) and the conveyor (10-1) are arranged tilted from left to right from low to high; the hydraulic pulper (11) is arranged below the outlet (10-3); Support rods (10-4), there are two support rods (10-4), which are respectively fixed to the left and right sides of the bottom of the outer box (10-2); The limiting frames (10-5) are two in number and are respectively fixed on the annular wall of the hydraulic pulper (11), and the limiting frames (10-5) are fixed on the bottom of the support rod (10-4).

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