CN113087001A

CN113087001A - Device and method for preparing polyaluminum chloride liquid from environment-friendly metal aluminum

Info

Publication number: CN113087001A
Application number: CN202110223717.2A
Authority: CN
Inventors: 史永忠; 张劭霆; 俞锋
Original assignee: Jiangsu Lanyao Water Purifying Agent Co ltd
Current assignee: Jiangsu Lanyao Water Purifying Agent Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-07-09
Anticipated expiration: 2041-03-01
Also published as: CN113087001B

Abstract

The invention relates to the field of preparation of polyaluminium chloride, in particular to a device for preparing polyaluminium chloride liquid from environment-friendly metal aluminum. The interface assembly is arranged at the upper end of the shell. The motor component drives a motor shaft to rotate; the worm-shaped reel is fixedly provided with a limited sawtooth groove and a material dropping groove, the width of each sawtooth groove is gradually increased from inside to outside, and the upper rotary cutter drives the raw materials to move in the sawtooth grooves; the saw tooth assembly is arranged on the snail-shaped reel to saw off the raw material in each saw tooth groove; the sealing material guide plate is arranged at the lower end of the shell, the discharging barrel is configured to guide the raw materials of the sealing material guide plate to a balling machine for balling treatment, so that the raw materials enter a rotary furnace for calcination after the balling treatment, and are subjected to polymerization reaction with hydrochloric acid after the calcination. So that the raw materials for preparing the aluminum chloride are fully crushed.

Description

Device and method for preparing polyaluminum chloride liquid from environment-friendly metal aluminum

Technical Field

The invention relates to the field of preparation of polyaluminium chloride, in particular to a device and a method for preparing polyaluminium chloride liquid from environment-friendly metal aluminum.

Background

Polyaluminium chloride is a water purifying material, an inorganic polymer coagulant, also called polyaluminium for short, and is called PAC for short, and is an inorganic polymer water treatment agent with large molecular weight and high charge, which is produced by the bridging action of hydroxide ions and the polymerization action of polyvalent anions. The shape of the product can be divided into solid and liquid.

The existing preparation of liquid-polyaluminium chloride solutions comprises two steps: step one, selecting bauxite, high-calcium stone and anthracite as raw materials, crushing the raw materials, mixing and grinding the raw materials to obtain a mixed material, balling the mixed material, and then putting the mixed material into a high-temperature area of a rotary furnace for calcining; the calcination temperature in the rotary furnace is at least 1350 ℃; the rotary furnace comprises a calcining area, a high-temperature area and a mixed material area, wherein when the mixed material enters the high-temperature area, part of anthracite is burnt out, and the activated carbon is produced under the condition that oxygen in the rotary furnace is insufficient. And step two, carrying out polymerization reaction on the calcined material in the step one and hydrochloric acid to obtain a yellow liquid-polyaluminum chloride solution, and adsorbing the color in the yellow liquid-polyaluminum chloride solution by using activated carbon in the process to obtain a white liquid-polyaluminum chloride solution. In the process of crushing and smashing raw materials, the insufficient smashing of the raw materials leads to low balling effect, so that the utilization rate of the raw materials is reduced, and the problem of environmental pollution is solved.

Disclosure of Invention

The invention provides a device and a method for preparing polyaluminium chloride liquid from environment-friendly metal aluminum, which aim to solve the problem of insufficient crushing of the existing raw materials for preparing the polyaluminium chloride.

The device for preparing the polyaluminium chloride liquid from the environment-friendly metal aluminum adopts the following technical scheme:

an environment-friendly device for preparing polyaluminium chloride liquid from metal aluminum comprises a crushing device and a granulator; the crushing device comprises a shell, a motor shaft, a motor assembly, an interface assembly, an upper rotary cutter, a volute reel, a sawtooth assembly, a discharge barrel and a sealing material guide plate; the shell is vertically arranged, and the interface assembly is arranged at the upper end of the shell and is connected with a water outlet of the vegetable washing pool; the motor assembly is arranged at the lower end of the shell, the motor shaft is vertically arranged in the shell, and the motor assembly drives the motor shaft to rotate; the snail-shaped reel is fixedly arranged and comprises one or more separation strips so as to limit at least one sawtooth groove and at least one material dropping groove, and the material dropping groove is communicated with the sawtooth groove and is positioned at the inner end of the sawtooth groove; the width of each sawtooth groove is gradually increased from inside to outside; the saw tooth assembly is arranged on the worm-shaped reel to receive the raw materials from the upper part and is used for sawing off the raw materials in each saw tooth groove; the upper rotating knife is arranged at the upper end of the motor shaft and is positioned above the snail-shaped reel, and the upper end opening of the material dropping groove is closed so as to prevent the raw materials from directly entering the material dropping groove; the upper rotary cutter drives the raw material to move towards the inner end in the sawtooth groove, so that the sawtooth assembly saws the raw material, and the sawn part of the raw material enters the material falling groove and falls off from the material falling groove; the sealing material guide plate is arranged at the lower end of the shell and is used for receiving the sawn raw materials; the discharging barrel is configured to guide the raw materials of the sealing material guide plate to a balling machine for balling treatment, so that the raw materials enter the rotary furnace for calcination after the balling treatment, and are subjected to polymerization reaction with hydrochloric acid after the calcination.

Further, the sawtooth subassembly includes the multiunit sawtooth, and a plurality of sawtooth of every group sawtooth set up on the parting bead of the both sides of a sawtooth groove, and stretch into this sawtooth groove.

Further, the sawtooth assembly comprises a plurality of mounting mechanisms, and the mounting mechanisms are arranged on the separating strip and used for mounting the sawteeth on two sides of the separating strip, so that two sawteeth are mounted at each mounting position of the separating strip.

Furthermore, each mounting structure comprises a fixing rod, a torsion spring, a bump and two jacking blocks; the fixing rod is vertically arranged on the separating strip, the torsional spring is provided with a sleeving part and two extending parts connected to the sleeving part, the sleeving part is sleeved on the fixing rod, the two extending parts extend outwards from the sleeving part, the distance between the two extending parts is gradually increased along the direction far away from the sleeving part, the sawteeth are arranged on two sides of the extending parts, and when the sawteeth cut raw materials, the raw materials enable the tail ends of the corresponding extending parts to be close to the other extending part through the sawteeth; the two convex blocks are respectively arranged at two sides of the separation strip, the position, close to the tail end of the extension part, of the sawtooth is provided with a limiting block, and the convex blocks are in contact with the limiting blocks so as to prevent the tail end of the extension part from entering the sawtooth groove; the two top blocks are respectively arranged on two opposite surfaces of the two sawteeth and extend into the space between the tail ends of the two extending parts.

Further, the two saw teeth mounted on each mounting mechanism are connected through a connecting structure, the connecting structure and the two ejector blocks are positioned on two sides of the sleeving part, and the connecting structure is configured to allow the two saw teeth to rotate relatively; the saw teeth are made of elastic materials, the two saw teeth are integrally formed, and the connecting structure is a connecting part between the two saw teeth; or the connecting structure is an elastic piece; or the connecting structure is a hinge structure.

Furthermore, the device also comprises a lower rotary cutter, wherein the lower rotary cutter is arranged below the scroll-shaped reel, and each separating strip winds the motor shaft for at least one circle or at least two circles.

Furthermore, the outermost end of the separation strip is provided with a fixing block, and the shell is provided with a fixing groove matched with the fixing block.

Furthermore, the sawteeth on two sides of the sawtooth groove are arranged into a plurality of layers, and the adjacent two layers of sawteeth are arranged in a staggered mode in the up-down direction.

The preparation method of the device for preparing the polyaluminium chloride liquid by utilizing the environment-friendly metal aluminum comprises the following steps: the raw material enters the sawing cavity through the feeding soft board, the motor drives the upper rotary cutter to rotate anticlockwise, the raw material falls into the serrated groove from top to bottom under the action of gravity, the serrated groove clamps part of the raw material, the rotation of the upper rotary cutter drives the raw material to move inwards along the serrated groove, and when the raw material is sawed off, if the raw material is clamped again, the upper rotary cutter continues to drive the raw material to move inwards until the raw material falls into the discharging cavity from the discharging groove; if the raw material cannot be blocked again, the upper rotary cutter drives the raw material to move outwards until the raw material moves to a sawtooth groove which meets the width of the raw material, the raw material is blocked again, and the raw material moves inwards under the drive of the upper rotary cutter again; if the raw material cannot be clamped when moving outwards, the raw material belongs to the sawn raw material after falling after the gap of the sawtooth groove falls, and the raw material enters the discharging cavity after falling; the fallen raw materials enter a sealed material guide plate;

the raw materials on the sealed guide plate are guided to a ball forming machine by a discharge barrel, and the ball forming machine performs ball forming treatment;

putting the material obtained after the balling treatment into a rotary furnace for calcining, and generating active carbon in the rotary furnace;

and (3) carrying out polymerization reaction on the calcined material and hydrochloric acid to obtain a yellow liquid-polyaluminum chloride solution, wherein in the process, the activated carbon adsorbs the color in the yellow liquid-polyaluminum chloride solution to obtain a white liquid-polyaluminum chloride solution.

The invention has the beneficial effects that: according to the device for preparing the polyaluminium chloride liquid from the environment-friendly metal aluminum, disclosed by the invention, the raw material enters the sawing cavity from the feeding soft plate, the volute-shaped reel is provided with the sawtooth grooves, the raw material is clamped by sawteeth on two sides of the sawtooth grooves after falling from the feeding soft plate, the rotary cutter rotates anticlockwise to drive the raw material to move in the sawtooth grooves and be sawn and cut, the raw material enters the falling groove under the action of the thrust of the latter raw material and finally falls into the discharging cavity, the volute-shaped reel is effectively prevented from being clamped, and the motor is further protected. The shell comprises an upper shell and a lower shell, and the crushing device is convenient to mount. The upper end of casing is provided with the pan feeding soft board, can effectively prevent that the raw materials from splashing. The upper part and the lower part of the snail-shaped reel are both provided with rotary cutters so as to increase the stability of the snail-shaped reel. This device can improve the broken degree of raw materials, and then the utilization ratio of the raw materials that improves.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of an apparatus for preparing polyaluminum chloride liquid from environment-friendly aluminum metal according to the present invention.

FIG. 2 is a schematic structural diagram of a crushing device in an embodiment of an apparatus for preparing polyaluminum chloride liquid from environment-friendly aluminum metal according to the present invention.

FIG. 3 is a top view of an upper rotating blade in an embodiment of an apparatus for preparing polyaluminum chloride liquid from aluminum metal according to the present invention.

FIG. 4 is a top view of a scroll-shaped reel of an embodiment of an apparatus for preparing polyaluminum chloride liquid from aluminum metal according to the present invention.

FIG. 5 is a front view showing the reel unwinding of an embodiment of an apparatus for preparing polyaluminum chloride liquid from aluminum metal in an environment-friendly manner.

FIG. 6 is a top view of a saw tooth assembly in an embodiment of an apparatus for preparing polyaluminum chloride liquid from aluminum metal according to the present invention.

FIG. 7 is a top view of a lower rotary cutter in an embodiment of an apparatus for preparing polyaluminum chloride liquid from aluminum metal in an environment-friendly manner.

In the figure: 1. an interface component; 2. feeding a soft board; 3. a nut; 4. sawing off the cavity; 5. an upper rotary cutter; 501. an upper rotating cutter arm; 502. a first spline groove; 503. a closed ring; 6. a snail-shaped reel; 601. a fixed block; 602. a dividing strip; 603. fixing the sleeve; 604. a sawtooth groove; 605. a guide ramp; 606. a material dropping groove; 607. fixing grooves; 7. a motor shaft; 8. a first seal ring; 9. a discharging barrel; 10. a support plate; 11. a motor; 12. a motor case; 13. a support sleeve; 14. a second deep groove ball bearing; 15. sealing the material guide plate; 16. a lower case; 17. a discharge cavity; 18. a first deep groove ball bearing; 19. an upper shell; 20. a sawtooth assembly; 2001. a torsion spring; 2002. saw teeth; 2003. a top block; 2004. fixing the rod; 2005. a limiting block; 21. a second seal ring; 22. a lower rotary cutter; 2201. a lower cutter arm; 2202. a second spline groove; 30. a crushing device; 31. a ball forming machine.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, an embodiment of an apparatus for preparing polyaluminum chloride liquid from environment-friendly metallic aluminum according to the present invention includes a crushing apparatus 30 and a pelletizer 31; the crushing device 30 comprises a shell, a motor shaft 7, a motor assembly, an interface assembly 1, an upper rotary cutter 5, a volute reel 6, a sawtooth assembly 20, a discharge barrel 9 and a sealing material guide plate 15. The shell is vertically arranged, and the interface component 1 is arranged at the upper end of the shell so as to be connected with a water outlet of a vegetable washing pool; the motor assembly is arranged at the lower end of the shell, the motor shaft 7 is vertically arranged in the shell, and the motor assembly drives the motor shaft 7 to rotate; the worm-shaped reel 6 is fixedly arranged, the worm-shaped reel 6 comprises one or more separation strips 602 so as to define at least one sawtooth groove 604 and at least one blanking groove 606, and the blanking groove 606 is communicated with the sawtooth groove 604 and is positioned at the inner end of the sawtooth groove 604; the width of each sawtooth groove 604 is gradually increased from inside to outside; the saw assembly 20 is mounted on the worm reel 6 to receive material from above and to saw material in each saw slot 604. Go up rotary cutter 5 and set up the upper end of motor shaft 7 and be located the top of snail form reel 6, snail form reel 6 and last rotary cutter 5 interval set up, and seal the upper end opening of silo 606 to hinder the raw materials directly to get into silo 606. The upper rotary cutter 5 drives the raw material to move towards the inner end in the sawtooth groove 604, so that the sawtooth assembly 20 saws the raw material, and the sawn part of the raw material enters the material falling groove 606 and falls off from the material falling groove 606; the sealing material guide plate 15 is arranged at the lower end of the shell and is used for receiving the sawn raw materials; the discharging barrel 9 is configured to guide the raw material of the sealing material guide plate 15 to a balling machine 31 for balling treatment, so that the raw material enters a rotary furnace for calcination after the balling treatment, and is subjected to polymerization reaction with hydrochloric acid after the calcination.

In this embodiment, the saw tooth assembly 20 includes a plurality of sets of saw teeth 2002, and the plurality of saw teeth 2002 of each set of saw teeth 2002 are disposed on the separation bar 602 on both sides of one saw tooth slot 604 and extend into the saw tooth slot 604. The sawtooth assembly 20 includes a plurality of mounting mechanisms disposed on the division bar 602 for mounting the sawteeth 2002 on both sides of the division bar 602 such that there are two sawteeth 2002 at each mounting location of the division bar 602. Each mounting structure includes a fixed rod 2004, a torsion spring 2001, two top blocks 2003. The fixing rod 2004 is vertically arranged on the separating strip 602, the torsion spring 2001 is provided with a sleeving part and two extending parts connected to the sleeving part, the sleeving part is sleeved on the fixing rod 2004, the two extending parts extend outwards from the sleeving part, the distance between the two extending parts is gradually increased along the direction far away from the sleeving part, the sawteeth 2002 are arranged on two sides of the extending parts, and when the sawteeth cut raw materials, the raw materials enable the tail ends of the corresponding extending parts to be close to the other extending part through the sawteeth. The two protruding blocks are respectively arranged on two sides of the separating strip 602, a position on the sawtooth 2002 near the tail end of the extending portion is provided with a limiting block 2005, and the protruding blocks are in contact with the limiting blocks 2005 so as to prevent the tail end of the extending portion from entering the sawtooth groove 604 (prevent the position on the sawtooth 2002 near the tail end of the extending portion from entering the sawtooth groove 604). Two top blocks 2003 are respectively disposed on two opposite surfaces of the two saw teeth 2002 and extend between the ends of the two extending portions.

In this embodiment, the two saw teeth 2002 mounted on each mounting mechanism are connected by a connecting structure, and the connecting structure and the two top blocks 2003 are arranged on two sides of the sleeving part, and the connecting structure is configured to allow the two saw teeth 2002 to rotate relatively. The saw teeth 2002 are made of elastic materials, two saw teeth 2002 are integrally formed, and the connecting structure is a connecting part between the two saw teeth; or the connecting structure is an elastic piece; or the connecting structure is a hinge structure.

In this example, each of the division bars 602 makes at least one or at least two revolutions around the motor shaft 7 to increase the path of the material being sawn and thus make the sawing more complete. The outermost end of the separation strip 602 is provided with a fixing block 601, and the housing is provided with a fixing groove 607 matched with the fixing block 601. The inner side surface of the fixed block 601 is provided with a guide inclined surface 605, and the guide inclined surface 605 is positioned between the inner wall surface of the shell and the surface of the separation strip 602, which is away from the shell, so as to guide the outermost raw material to enter the sawtooth groove 604. The sawteeth 2002 on the two sides of the sawtooth groove 604 are arranged in multiple layers, and the two layers of sawteeth 2002 are arranged in a staggered manner in the vertical direction, so that raw materials are fully sawn.

In this example, the thickness of the separation strip 602 in the up-down direction is gradually reduced from the inner end to the outer end, and then the thickness is kept unchanged, so that the top breaking of the raw material is facilitated when the raw material is cut along the sawtooth groove 604; the spiral winding machine further comprises a lower rotary cutter 22, wherein the lower rotary cutter 22 is arranged below the spiral reel 6, and the stability of the spiral reel 6 is improved.

In this example, the case includes an upper case 19 and a lower case 16, the upper case 19 is positioned above the lower case 16, and the upper case 19 and the lower case 16 cooperate to form the fixing groove 607. The upper rotary cutter 5 comprises an upper rotary cutter arm 501, a first spline groove 502 and a closing ring 503; the upper rotary cutter arm 501 is a plurality of closed rings 503 which are uniformly arranged along the circumferential direction, the inner wall surface of the closed rings 503 is provided with a first spline groove 502, and the motor shaft 7 is provided with a first guide rail matched with the first spline groove 502. Lower rotary cutter 22 includes a plurality of lower rotor arms 2201, solid fixed ring and second flower keyway 2202, and a plurality of lower rotor arms 2201 evenly set up along solid fixed ring's circumferential direction, and the interior of solid fixed ring is avoided you to be provided with second flower keyway 2202, and motor shaft 7 is provided with the second guide rail with second flower keyway 2202 complex. The upper end surface of the motor shaft 7 is provided with a nut 3 to prevent the upper rotary cutter 5 from moving upward. The snail-shaped reel 6 further comprises a fixing sleeve 603, a plurality of separating strips 602 are uniformly arranged along the circumferential direction of the fixing sleeve 603, and a first deep groove ball bearing 18 is arranged between the fixing sleeve 603 and the motor shaft 7. The contact department of interface module 1 and casing is provided with pan feeding soft board 2, and pan feeding soft board 2 level sets up and can cover interface module 1 and casing kneck, prevents that the raw materials from splashing.

In this example, the cavity formed by the spiral reel 6 and the upper shell 19 is the sawing cavity 4, and the cavity formed by the spiral reel 6, the sealing material guide plate 15 and the lower shell 16 is the discharging cavity 17. The motor assembly comprises a motor 11 and a motor box 12, the motor 11 is arranged in the motor box 12, the motor box 12 protects the motor 11, and the motor 11 drives the motor shaft 7 to rotate. The contact part of the motor case 12 and the lower shell 16 is provided with a support plate 10. A second deep groove ball bearing 14 is arranged between the sealing material guide plate 15 and the motor shaft 7, a support sleeve 13 is arranged between the sealing material guide plate 15 and the support plate 10, and the support sleeve 13 is used for supporting the sealing material guide plate 15. A first sealing ring 8 is arranged between the sealing material guide plate 15 and the motor shaft 7, and a second sealing ring 21 is arranged between the support plate 10 and the motor shaft 7.

The invention also provides a preparation method of the device for preparing the polyaluminium chloride liquid from the environment-friendly metal aluminum, which comprises the following steps:

raw materials enter the sawing cavity 4 from the feeding soft plate 2, the motor 11 drives the upper rotary cutter 5 to rotate anticlockwise, the raw materials fall into the serrated groove 604 from top to bottom under the action of gravity, the serrated groove 604 clamps part of the raw materials, the rotation of the upper rotary cutter 5 drives the raw materials to move inwards along the serrated groove 604, and when the raw materials are sawn off, if the raw materials are clamped again, the upper rotary cutter 5 continues to drive the raw materials to move inwards until the raw materials fall into the discharging cavity 17 from the discharging groove 606; if the raw material can not be blocked again, the upper rotary cutter 5 drives the raw material to move outwards until the raw material moves to the sawtooth groove 604 which meets the width of the raw material, the raw material can be blocked again, and the raw material moves inwards again under the drive of the upper rotary cutter 5; if the raw material cannot be stuck when moving outwards, the raw material belongs to the sawn raw material after falling after the gap of the sawtooth groove 604 falls, and enters the discharging cavity 17 after falling; the fallen raw materials enter the sealing material guide plate 15;

the raw materials on the sealing material guide plate 15 are guided to a balling machine 31 by a discharge barrel 9, and the balling machine 31 performs balling treatment; putting the material obtained after the balling treatment into a rotary furnace for calcining, and generating active carbon in the rotary furnace; and (3) carrying out polymerization reaction on the calcined material and hydrochloric acid to obtain a yellow liquid-polyaluminum chloride solution, wherein in the process, the activated carbon adsorbs the color in the yellow liquid-polyaluminum chloride solution to obtain a white liquid-polyaluminum chloride solution.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a device of environment-friendly metal aluminium preparation polyaluminium chloride liquid which characterized in that: comprises a crushing device and a ball forming mill; the crushing device comprises a shell, a motor shaft, a motor assembly, an interface assembly, an upper rotary cutter, a volute reel, a sawtooth assembly, a discharge barrel and a sealing material guide plate; the shell is vertically arranged, and the interface assembly is arranged at the upper end of the shell and is connected with a water outlet of the vegetable washing pool; the motor assembly is arranged at the lower end of the shell, the motor shaft is vertically arranged in the shell, and the motor assembly drives the motor shaft to rotate; the snail-shaped reel is fixedly arranged and comprises one or more separation strips so as to limit at least one sawtooth groove and at least one material dropping groove, and the material dropping groove is communicated with the sawtooth groove and is positioned at the inner end of the sawtooth groove; the width of each sawtooth groove is gradually increased from inside to outside; the saw tooth assembly is arranged on the worm-shaped reel to receive the raw materials from the upper part and is used for sawing off the raw materials in each saw tooth groove; the upper rotating knife is arranged at the upper end of the motor shaft and is positioned above the snail-shaped reel, and the upper end opening of the material dropping groove is closed so as to prevent the raw materials from directly entering the material dropping groove; the upper rotary cutter drives the raw material to move towards the inner end in the sawtooth groove, so that the sawtooth assembly saws the raw material, and the sawn part of the raw material enters the material falling groove and falls off from the material falling groove; the sealing material guide plate is arranged at the lower end of the shell and is used for receiving the sawn raw materials; the discharging barrel is configured to guide the raw materials of the sealing material guide plate to a balling machine for balling treatment, so that the raw materials enter the rotary furnace for calcination after the balling treatment, and are subjected to polymerization reaction with hydrochloric acid after the calcination.

2. The device for preparing the polyaluminum chloride liquid from the environment-friendly metallic aluminum as claimed in claim 1, wherein: the sawtooth subassembly includes the multiunit sawtooth, and a plurality of sawtooth of every group sawtooth set up on the parting bead of the both sides of a sawtooth groove, and stretch into this sawtooth groove.

3. The device for preparing the polyaluminium chloride liquid from the environment-friendly metallic aluminum as claimed in claim 2, wherein: the sawtooth assembly comprises a plurality of mounting mechanisms, and the mounting mechanisms are arranged on the separating strip and used for mounting sawteeth on two sides of the separating strip, so that two sawteeth are mounted at each mounting position of the separating strip.

4. The device for preparing the polyaluminum chloride liquid from the environment-friendly metallic aluminum as claimed in claim 3, wherein: each mounting structure comprises a fixed rod, a torsion spring, a convex block and two top blocks; the fixing rod is vertically arranged on the separating strip, the torsional spring is provided with a sleeving part and two extending parts connected to the sleeving part, the sleeving part is sleeved on the fixing rod, the two extending parts extend outwards from the sleeving part, the distance between the two extending parts is gradually increased along the direction far away from the sleeving part, the sawteeth are arranged on two sides of the extending parts, and when the sawteeth cut raw materials, the raw materials enable the tail ends of the corresponding extending parts to be close to the other extending part through the sawteeth; the two convex blocks are respectively arranged at two sides of the separation strip, the position, close to the tail end of the extension part, of the sawtooth is provided with a limiting block, and the convex blocks are in contact with the limiting blocks so as to prevent the tail end of the extension part from entering the sawtooth groove; the two top blocks are respectively arranged on two opposite surfaces of the two sawteeth and extend into the space between the tail ends of the two extending parts.

5. The device for preparing the polyaluminum chloride liquid from the environment-friendly metallic aluminum as claimed in claim 4, wherein: the two sawteeth mounted on each mounting mechanism are connected through a connecting structure, the connecting structure and the two ejector blocks are positioned on two sides of the sleeving part, and the connecting structure is configured to allow the two sawteeth to rotate relatively; the saw teeth are made of elastic materials, the two saw teeth are integrally formed, and the connecting structure is a connecting part between the two saw teeth; or the connecting structure is an elastic piece; or the connecting structure is a hinge structure.

6. The device for preparing the polyaluminum chloride liquid from the environment-friendly metallic aluminum as claimed in claim 5, wherein: the lower rotary cutter is arranged below the snail-shaped reel, and each separating strip winds the motor shaft for at least one circle or at least two circles.

7. The device for preparing the polyaluminum chloride liquid from the environment-friendly metallic aluminum as claimed in claim 6, wherein: the outermost end of the separation strip is provided with a fixed block, and the shell is provided with a fixed groove matched with the fixed block.

8. The device for preparing the polyaluminum chloride liquid from the environment-friendly metallic aluminum as claimed in claim 7, wherein: the inner side surface of the fixed block is a guide inclined surface which is positioned between the inner wall surface of the shell and the surface of the separation strip departing from the shell so as to guide the raw materials to enter the sawtooth groove.

9. The device for preparing the polyaluminum chloride liquid from the environment-friendly metallic aluminum according to claim 8, wherein: the sawteeth on two sides of the sawtooth groove are arranged into a plurality of layers, and the adjacent two layers of sawteeth are arranged in a staggered mode in the up-down direction.

10. A method for preparing polyaluminium chloride liquid by using the environment-friendly metallic aluminum as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:

the raw material enters the sawing cavity through the feeding soft board, the motor drives the upper rotary cutter to rotate anticlockwise, the raw material falls into the serrated groove from top to bottom under the action of gravity, the serrated groove clamps part of the raw material, the rotation of the upper rotary cutter drives the raw material to move inwards along the serrated groove, and when the raw material is sawed off, if the raw material is clamped again, the upper rotary cutter continues to drive the raw material to move inwards until the raw material falls into the discharging cavity from the discharging groove; if the raw material cannot be blocked again, the upper rotary cutter drives the raw material to move outwards until the raw material moves to a sawtooth groove which meets the width of the raw material, the raw material is blocked again, and the raw material moves inwards under the drive of the upper rotary cutter again; if the raw material cannot be clamped when moving outwards, the raw material belongs to the sawn raw material after falling after the gap of the sawtooth groove falls, and the raw material enters the discharging cavity after falling; the fallen raw materials enter a sealed material guide plate;