CN111483080A

CN111483080A - Waste plastic recycling device with multi-stage melting deslagging purification structure

Info

Publication number: CN111483080A
Application number: CN202010321358.XA
Authority: CN
Inventors: 陈严
Original assignee: Taizhou Wentao Technology Co ltd
Current assignee: Taizhou Wentao Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-08-04

Abstract

The invention provides a waste plastic recycling device with a multi-stage melting, deslagging and purifying structure, and belongs to the field of plastic recycling. It includes the work box, the upper end of work box be equipped with and pulverize the mechanism, the downside that pulverizes the mechanism be equipped with the one-level and melt the chamber, the one-level downside that melts the chamber have the second grade and melt the chamber, the one-level melt chamber and second grade and melt and link to each other through coarse filtration net between the chamber, the second grade melt the bottom in chamber and be connected with and filter the deslagging mechanism, the work box in still be equipped with one and run through the one-level and melt the chamber and extend to the second grade and melt the axis of rotation of intracavity, the axis of rotation on be equipped with rab. Its advantages are high smelting speed, less impurities in recovered plastics and high purity of plastics.

Description

Waste plastic recycling device with multi-stage melting deslagging purification structure

Technical Field

The invention belongs to the field of plastic recycling and particularly relates to a waste plastic recycling device with a multi-stage melting, deslagging and purifying structure.

Background

In order to advocate sustainable development, plastics can be recovered and scientifically treated and classified to achieve the standard of recycling, the recovery of plastics plays a positive role in protecting environment, saving energy and driving social benefits, materials need to be melted again after the plastics are recovered and cleaned, the materials enter a melting and mixing state again, but the recovered plastics are often different in size and large in quantity, the recovered plastics contain a large amount of impurities, the impurities can influence the quality of the plastics if the impurities exist in the plastics after recovery, the existing recovery melting device generally directly discharges the plastics when the plastics are subjected to melting treatment, the plastics are not subjected to pretreatment, the excessive melting speed of the plastics is too low, the recovery efficiency of the plastics is influenced, and large plastic blocks can be blocked in a feeding hole and are not beneficial to continuous feeding, and impurities cannot be effectively removed.

For example, chinese patent document discloses a melting apparatus in foam recycling and pelletizing [ patent application No.: CN201611121539.8], which comprises a frame, a horizontal pipeline, a first filter screen, a connecting pipeline, a vertical pipeline, a second filter screen, a heater, a protective cover, a feeding pipe, a bracket, a top plate, a support rod and the like; a horizontal pipeline is connected to the rack in a bolt connection mode, a first filter screen is arranged on the right side of the horizontal pipeline, and a vertical pipeline is arranged on the upper portion of the left side of the horizontal pipeline. When the foam plastic needs to be melted, the heater is controlled to work, and meanwhile, the worker continuously moves the pull rod left and right to enable the gear to continuously rotate clockwise and anticlockwise alternately. The device melts slowly, and can not effectively reject the impurity.

Disclosure of Invention

The invention aims to solve the problems and provides a waste plastic recycling device with a multi-stage melting deslagging and purifying structure.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an abandonment plastics recycle device with multistage melting removes slag purification structure, includes the work box, the upper end of work box be equipped with and pulverize the mechanism, the downside that pulverizes the mechanism be equipped with the one-level and melt the chamber, the one-level downside that melts the chamber have the second grade and melt the chamber, the one-level melt chamber and second grade and melt and link to each other through coarse filtration net between the chamber, the second grade melt the bottom in chamber and be connected with and filter the mechanism of removing slag, the work box in still be equipped with one and run through the one-level and melt the chamber and extend to the axis of rotation that the intracavity was melted to the second grade, the axis.

In foretell waste plastic recycle device who has multistage melting deslagging purification structure, grinding mechanism include melt the crushing chamber of chamber intercommunication with one-level, grinding chamber on rotate and have two crushing rollers of mutual opposition, be equipped with a plurality of rings on each crushing roller and roll the part.

In foretell waste plastic recycle device who has multistage melting deslagging purification structure, a plurality of circles on two crushing rollers roll the part and set up in turn, roll the part and include that a plurality of rolls the granule, each rolls a plurality of on the part and rolls the granule along rolling the equidistant setting of roller circumference.

In foretell waste plastic recycle device who has multistage melting deslagging purification structure, the one-level melt the chamber downside and have the second grade case that sets up in the work box, the second grade melt the chamber and be located the second grade incasement, the coarse filtration net fix the upside at the second grade case, rabbling mechanism including being located the one-level a plurality of auger blade that melts the chamber, a plurality of auger blade sets firmly in the axis of rotation and sets gradually along the axis of rotation axial, rabbling mechanism still including being located the second grade a plurality of stirring rods that melt the chamber, a plurality of stirring rods set firmly in the axis of rotation and set gradually along the axis of rotation axial.

In the waste plastic recycling device with the multistage melting, deslagging and purifying structure, a gap in the axial direction of the rotating shaft is formed between every two adjacent stirring rods, and heating rods arranged on the inner walls of the primary melting cavity and the secondary melting cavity are respectively arranged between every two adjacent auger blades and between every two adjacent stirring rods.

In foretell waste plastic recycle device who has multistage melting deslagging purification structure, filtering deslagging mechanism including set up in the second grade melt chamber bottom and rather than the thin filter screen chamber that communicates, thin filter screen chamber fix the thin filter ring formation in second grade bottom of the case portion by the round, thin filter screen chamber be the circular cone of inversion and take the form, the bottom in thin filter screen chamber be connected with the deslagging part that has the collection sediment thing.

In foretell waste plastic recycle device who has multistage melting deslagging purification structure, the deslagging part including setting up the deslagging strip in thin filter ring bottom, the deslagging strip in be equipped with the deslagging chamber, deslagging intracavity swing joint have the slag pushing block, deslagging chamber and thin filter screen chamber's bottom intercommunication, deslagging chamber's bottom intercommunication have one deck thin filter screen layer, deslagging strip extend thin filter screen chamber and link to each other with the work box, deslagging chamber keep away from the tip intercommunication in thin filter screen chamber and have the receipts sediment chamber that sets up in the work box.

In foretell waste plastic recycle device who has multistage melting deslagging purification structure, the deslagging chamber be the slope setting, deslagging chamber and thin filter screen chamber's bottom plane between be the acute angle, just deslagging chamber upwards extend from the one end to the other end slope that is close to thin filter screen chamber.

In foretell waste plastic recycle device who has multistage melting deslagging purification structure, the side inner wall of receipts sediment chamber on be equipped with the deslagging oil cylinder, deslagging oil cylinder's output shaft with push away the sediment piece and link to each other, receipts sediment chamber on still movable have the switch door, the switch door be connected with the switch hydro-cylinder, the switch hydro-cylinder drives the switch door and opens or close and receive the sediment chamber.

In the waste plastic recycling device with the multi-stage melting deslagging purification structure, the deslagging strip extends out of the top of the cavity part of the fine filter screen to be arranged in a pointed manner.

Compared with the prior art, the invention has the advantages that:

1. the plastic colloid removing device is provided with a primary melting chamber and a secondary melting chamber, wherein the upper side of the primary melting chamber is connected with a grinding mechanism, the bottom of the secondary melting chamber is connected with a filtering and deslagging mechanism, plastic is ground by the grinding mechanism and is fully melted by the primary melting chamber and the secondary melting chamber, impurities can be removed when plastic colloid is taken out, the melting speed is improved, the impurities in the recovered plastic are reduced, and the purity of the plastic is improved.

2. The stirring mechanism comprises a plurality of auger blades positioned in the primary melting cavity, and the auger blades can generate thrust for promoting the downward movement of plastics in the rotation process of the auger blades because the plastic blocks are only preliminarily melted in the primary melting cavity, so that the preliminarily melted plastics can quickly enter the secondary melting cavity, and plastic colloid melted in the secondary melting cavity can quickly pass through the filtering and deslagging mechanism.

3. The deslagging cavity is obliquely arranged and extends upwards from one end close to the fine filter screen cavity to the other end, so that resource waste is prevented.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of a crushing roller;

FIG. 3 is a schematic cross-sectional view A-A of FIG. 1;

fig. 4 is a schematic cross-sectional view of B-B in fig. 1.

In the figure: the device comprises a working box 10, a crushing mechanism 11, a primary melting cavity 12, a secondary melting cavity 13, a coarse filter screen 14, a filtering and deslagging mechanism 15, a rotating shaft 16, a stirring mechanism 17, a crushing cavity 18, a crushing roller 19, a rolling part 20, rolling particles 21, auger blades 22, a stirring rod 23, a heating rod 24, a fine filter screen cavity 25, a deslagging part 26, a deslagging strip 27, a deslagging cavity 28, a deslagging block 29, a fine filter screen layer 30, a deslagging cavity 31, a deslagging oil cylinder 32, an opening and closing door 33, an opening and closing oil cylinder 34, a secondary box 35 and a fine filter ring 36.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Combine shown in fig. 1-4, a waste plastic recycle device with multistage melting deslagging purification structure, including work box 10, work box 10's upper end be equipped with and pulverize mechanism 11, the downside that pulverizes mechanism 11 be equipped with the one-level and melt chamber 12, the downside that the one-level melts chamber 12 have the second grade and melt chamber 13, the one-level melt chamber 12 and the second grade and melt and link to each other through coarse filtration net 14 between the chamber 13, the second grade melt the bottom of chamber 13 and be connected with filtration deslagging mechanism 15, work box 10 in still be equipped with one and run through the one-level and melt chamber 12 and extend to the second grade and melt axis of rotation 16 in the chamber 13, axis of rotation 16 on be equipped with rabbling mechanism 17. The coarse filter screen 14 is a stainless steel screen with a pore size of 10-30 mesh, preferably 20-25 mesh.

In the present invention, the recycled plastic is fed into the grinding mechanism 11 before being poured into the primary melting chamber 12, so that some of the larger plastic is ground into small plastic pieces, and then fed into the primary melting chamber 12, and is subjected to primary melting in the primary melting chamber 12, so that the plastic is softened. Coarse filter 14's aperture is great, the plastics after the softening can pass coarse filter 14 and get into the second grade and melt chamber 13, melt the chamber 13 in the second grade and melt completely, the plastics colloid after melting completely passes filtering deslagging mechanism 15, and foreign particles in the plastics etc. can be filtered deslagging mechanism 15 and reject plastics, make the plastics of retrieving reduce impurity, the purity of plastics is improved, furthermore, rabbling mechanism 17 can not only stir the plastics that the one-level melted chamber 12 and second grade melted in the chamber 13 and accelerate its process of melting, rabbling mechanism 17 can also promote the plastics that melts to move down, accelerate the filter speed.

Grinding mechanism 11 include with one-level melt the grinding chamber 18 that chamber 12 communicates, grinding chamber 18 on rotate and have two mutual opposition grinding roller 19, be equipped with a plurality of circles on each grinding roller 19 and roll parts 20.

In the present invention, plastics are poured into the grinding chamber 18, and two grinding rollers 19 are connected to a grinding rotating motor, respectively, and the two grinding rotating motors are operated to rotate the two grinding rollers 19 in opposite directions, so that the grinding part 20 grinds large plastics into small particles and drops into the primary melting chamber 12.

A plurality of circles on two crushing rollers 19 roll parts 20 and set up in turn, roll parts 20 include that a plurality of rolls granule 21, a plurality of on each roll part 20 rolls granule 21 along 19 equidistant settings of circumference of crushing roller.

In the invention, a plurality of circles of rolling parts 20 are alternately arranged in sequence, and a plurality of rolling particles 21 on each rolling part 20 are arranged at equal intervals along the circumferential direction of the grinding roller 19, so that large plastics are rolled into a plurality of small plastics with uniform sizes.

The one-level melt chamber 12 downside have the second grade case 35 of setting in work box 10, the second grade melt chamber 13 and be located second grade case 35, coarse filtration net 14 fix the upside at second grade case 35, rabbling mechanism 17 melt a plurality of auger blade 22 of chamber 12 including being located the one-level, a plurality of auger blade 22 sets firmly in axis of rotation 16 and sets gradually along the 16 axial of axis of rotation, rabbling mechanism 17 still melt a plurality of stirring rods 23 in chamber 13 including being located the second grade, a plurality of stirring rods 23 set firmly in axis of rotation 16 and set gradually along the 16 axial of axis of rotation.

In the invention, the rotating shaft 16 is connected with a stirring rotating motor, the stirring rotating motor works to enable the rotating shaft 16 to drive the auger blades 22 and the stirring rods 23 to rotate, and because the plastic blocks are only preliminarily melted in the primary melting cavity 12, the auger blades 22 can generate thrust for promoting the downward movement of the plastic in the rotating process, the preliminarily melted plastic can quickly enter the secondary melting cavity 13, and the plastic colloid melted in the secondary melting cavity 13 can also quickly pass through the filtering and deslagging mechanism 15. The plastics after preliminary melting fall into second grade melting chamber 13 and carry out the second grade and melt, and plastics become the colloid under the heating effect this moment, and a plurality of stirring rods 23 rotate and can drive the plastics colloid and flow, increase plastics and melt into the speed of colloid.

Gaps in the axial direction of the rotating shaft 16 are formed between every two adjacent stirring rods 23, and heating rods 24 arranged on the inner walls of the primary melting cavity 12 and the secondary melting cavity 13 are respectively arranged between every two adjacent auger blades 22 and between every two adjacent stirring rods 23.

In the invention, a plurality of hot rods 24 are inserted into the first-stage melting cavity 12 and the second-stage melting cavity 13 to accelerate the melting speed, and in addition, a gap is formed between two adjacent auger blades 22, or the heating rod 24 is positioned at one thinner end of the auger blade 22 and cannot collide with the heating rod 24.

Filtering and deslagging mechanism 15 including set up melt chamber 13 bottom and rather than the fine filtration screen cavity 25 that communicates in the second grade, fine filtration screen cavity 25 fix the fine filtration circle 36 formation in second grade case 35 bottom by the round, fine filtration screen cavity 25 be the frustum of a cone of inversion, the bottom of fine filtration screen cavity 25 be connected with have the deslagging part 26 of collecting the sediment thing.

Because the fine filter screen cavity 25 is in the shape of an inverted cone, the plastic colloid can flow out from the side surface of the fine filter ring 36, the filtering speed is accelerated, and the impurities move downwards along the fine filter ring 36.

The fine filtering ring 36 is a stainless steel filtering net with a pore size of 100-400 meshes, preferably 200-300 meshes.

In the present invention, the plastic colloid in the secondary melting chamber 13 flows into the fine filter screen chamber 25, the filter screen pore size of the fine filter screen chamber 25 is small, the plastic colloid continues to flow and pass through the fine filter screen chamber 25, and some particulate impurities are blocked by the fine filter screen chamber 25, so as to move downwards and enter the deslagging member 26 to be collected and discharged by the deslagging member 26.

The deslagging component 26 comprises a deslagging strip 27 arranged at the bottom of a fine filtering ring 36, a deslagging cavity 28 is arranged in the deslagging strip 27, a deslagging block 29 is movably connected in the deslagging cavity 28, the deslagging cavity 28 is communicated with the bottom of a fine filtering screen cavity 25, the bottom of the deslagging cavity 28 is communicated with a fine filtering screen layer 30, the deslagging strip 27 extends out of the fine filtering screen cavity 25 and is connected with the working box 10, and the end part, far away from the fine filtering screen cavity 25, of the deslagging cavity 28 is communicated with a deslagging cavity 31 arranged in the working box 10.

The top of the fine filter screen layer 30 is provided with a stainless steel screen with a pore size of 100-400 meshes, preferably 200-300 meshes.

In the present invention, the aperture of the fine filter screen layer 30 is the same as that of the fine filter screen chamber 25, particulate impurities fall into the deslagging chamber 28, the slag pushing block 29 moves along the deslagging chamber 28 to push the impurities to extend out of the fine filter screen chamber 25, furthermore, most of the plastic colloid flows out through the side of the fine filter screen chamber 25, and a part of the plastic colloid flows into the deslagging chamber 28, and the plastic colloid flowing into the deslagging chamber 28 passes through the fine filter screen layer 30 to remove the impurities.

The deslagging cavity 28 is obliquely arranged, so that the fine filter screen layer 30 is obliquely arranged, an acute angle is formed between the deslagging cavity 28 and the bottom plane of the fine filter screen cavity 25, and the deslagging cavity 28 obliquely and upwards extends from one end close to the fine filter screen cavity 25 to the other end.

The part of the colloid plastic flowing into the deslagging chamber 28 can be conveyed forwards under the pushing of the deslagging inclusion 29 to be output to the fine filter screen chamber 25, thereby causing resource waste, therefore, the deslagging chamber 28 is arranged in an inclined shape in the invention, and the colloid plastic flows out of the deslagging chamber 28 under the self gravity of the colloid plastic. In addition, the fine filter screen layer 30 has a small inclination angle, and the surface of the impurities is stained with plastic colloid, so that the impurities have large friction in contact with the fine filter screen layer 30, and the impurities can be prevented from sliding back under the action of the inclined fine filter screen layer 30.

Receive the side inner wall of sediment chamber 31 on be equipped with the dregs of dregs hydro-cylinder 32, the output shaft of dregs hydro-cylinder 32 with push away the sediment piece 29 and link to each other, receive still that the activity has switch door 33 on the sediment chamber 31, switch door 33 be connected with switch hydro-cylinder 34, switch hydro-cylinder 34 drives switch door 33 and opens or close and receive sediment chamber 31.

In the invention, the deslagging cylinder 32 works to move the deslagging block 29 and push impurities into the deslagging cavity 31, and when more impurities in the deslagging cavity 31 need to be cleaned, the switch cylinder 34 works to open the deslagging cavity 31 through the switch door 33 so as to clean.

The deslagging bar 27 extends out of the top of the fine filter screen cavity 25 to be arranged in a pointed manner.

In the present invention, the portion of the plastic colloid flowing out from the side of the fine filter screen chamber 25 drops to the portion of the dross band 27 extending out of the fine filter screen chamber 25, and the portion is set to be pointed so as to prevent the plastic colloid from being accumulated on the dross band 27.

The working principle of the invention is as follows: plastics are poured into the grinding cavity 18, the two grinding rotating motors work to enable the two grinding rollers 19 to rotate oppositely, so that the grinding particles 21 crush and grind large plastic blocks, the large plastic blocks are divided into small plastic blocks with uniform sizes and fall into the primary melting cavity 12, the stirring rotating motors work to enable the rotating shafts 16 to drive the plurality of auger blades 22 and the plurality of stirring rods 23 to rotate, the plastic blocks are only primarily melted in the primary melting cavity 12, the auger blades 22 can generate thrust for promoting the plastics to move downwards in the rotating process, the primarily melted plastics can rapidly enter the secondary melting cavity 13, the plastic colloid formed by melting the secondary melting cavity 13 can rapidly pass through the fine filter screen cavity 25, the primarily melted plastics fall into the secondary melting cavity 13 for secondary melting, at the moment, the plastics are changed into colloid under the heating action, the plurality of stirring rods 23 can drive the plastic colloid to flow, increasing the speed of plastic melting into colloid. And some particle impurities are blocked by the fine filter screen cavity 25 to move downwards and enter the deslagging cavity 28, the deslagging oil cylinder 32 works to enable the deslagging block 29 to move and push impurities into the slag collecting cavity 31, and when the impurities in the slag collecting cavity 31 are more and need to be cleaned, the switch oil cylinder 34 works to enable the switch door 33 to open the slag collecting cavity 31 so as to be cleaned.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the working box 10, the crushing mechanism 11, the primary melting chamber 12, the secondary melting chamber 13, the coarse filter screen 14, the filtering and deslagging mechanism 15, the rotating shaft 16, the stirring mechanism 17, the crushing chamber 18, the crushing roller 19, the rolling part 20, the rolling particles 21, the auger blade 22, the stirring rod 23, the heating rod 24, the fine filter screen chamber 25, the deslagging part 26, the deslagging strip 27, the deslagging chamber 28, the slag pushing block 29, the fine filter screen layer 30, the slag collecting chamber 31, the deslagging cylinder 32, the switch door 33, the switch cylinder 34, the secondary tank 35, the fine filter ring 36, etc. are more used herein, these terms are used only for the purpose of more conveniently describing and explaining the essence of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides an abandonment plastics recycle device with multistage melting deslagging purification structure, includes work box (10), its characterized in that, the upper end of work box (10) be equipped with and pulverize mechanism (11), the downside that pulverizes mechanism (11) be equipped with the one-level and melt chamber (12), the one-level downside that melts chamber (12) have the second grade and melt chamber (13), the one-level melt chamber (12) and second grade and melt and link to each other through coarse filtration net (14) between chamber (13), the second grade melt the bottom of chamber (13) and be connected with and filter deslagging mechanism (15), work box (10) in still be equipped with one and run through the one-level and melt chamber (12) and extend to the second grade and melt axis of rotation (16) in chamber (13), axis of rotation (16) on be equipped with rabbling mechanism (17).

2. The waste plastic recycling device with multi-stage melting deslagging and purifying structure according to claim 1, characterized in that the grinding mechanism (11) comprises a grinding chamber (18) communicated with the primary melting chamber (12), two mutually opposite grinding rolls (19) are rotated on the grinding chamber (18), and each grinding roll (19) is provided with a plurality of circles of grinding parts (20).

3. The waste plastic recycling device with the multi-stage melting deslagging purification structure according to claim 2, wherein a plurality of circles of rolling parts (20) on two rolling rollers (19) are alternately arranged in sequence, the rolling parts (20) comprise a plurality of rolling particles (21), and the plurality of rolling particles (21) on each rolling part (20) are arranged at equal intervals along the circumferential direction of the rolling rollers (19).

4. The waste plastic recycling device with multi-stage melting deslagging purification structure according to claim 1, it is characterized in that a secondary box (35) arranged in the working box (10) is arranged at the lower side of the primary melting cavity (12), the secondary melting cavity (13) is positioned in the secondary box (35), the coarse filter screen (14) is fixed on the upper side of the secondary box (35), the stirring mechanism (17) comprises a plurality of auger blades (22) positioned in the first-stage melting cavity (12), the auger blades (22) are fixedly arranged on the rotating shaft (16) and are sequentially arranged along the axial direction of the rotating shaft (16), the stirring mechanism (17) further comprises a plurality of stirring rods (23) positioned in the secondary melting cavity (13), and the stirring rods (23) are fixedly arranged on the rotating shaft (16) and are sequentially arranged along the axial direction of the rotating shaft (16).

5. The waste plastic recycling device with the multi-stage melting, deslagging and purifying structure according to claim 4, is characterized in that a gap in the axial direction of the rotating shaft (16) is formed between two adjacent stirring rods (23), and a heating rod (24) arranged on the inner walls of the primary melting chamber (12) and the secondary melting chamber (13) is respectively arranged between every two adjacent auger blades (22) and between every two adjacent stirring rods (23).

6. The waste plastic recycling device with the multi-stage melting, deslagging and purifying structure according to claim 4, wherein the filtering and deslagging mechanism (15) comprises a fine filter screen cavity (25) which is arranged at the bottom of the secondary melting cavity (13) and is communicated with the secondary melting cavity, the fine filter screen cavity (25) is formed by a circle of fine filter ring (36) which is fixed at the bottom of the secondary box (35), the fine filter screen cavity (25) is in an inverted cone frustum shape, and a deslagging component (26) for collecting slag is connected to the bottom of the fine filter screen cavity (25).

7. The waste plastic recycling device with the multistage melting deslagging purification structure according to claim 6, wherein the deslagging component (26) comprises a deslagging bar (27) arranged at the bottom of the fine filtering ring (36), a deslagging cavity (28) is arranged in the deslagging bar (27), a deslagging block (29) is movably connected in the deslagging cavity (28), the deslagging cavity (28) is communicated with the bottom of the fine filtering screen cavity (25), the bottom of the deslagging cavity (28) is communicated with a fine filtering screen layer (30), the deslagging bar (27) extends out of the fine filtering screen cavity (25) and is connected with the working box (10), and a deslagging cavity (31) arranged in the working box (10) is communicated with the end part of the deslagging cavity (28) far away from the fine filtering screen cavity (25).

8. The waste plastic recycling device with multi-stage melting, deslagging and purifying structure according to claim 7, characterized in that the deslagging chamber (28) is disposed in an inclined manner, an acute angle is formed between the deslagging chamber (28) and the bottom plane of the fine filter screen chamber (25), and the deslagging chamber (28) extends upwards in an inclined manner from one end close to the fine filter screen chamber (25) to the other end.

9. The waste plastic recycling device with the multi-stage melting, deslagging and purifying structure according to claim 7, characterized in that deslagging oil cylinders (32) are arranged on the inner side walls of the deslagging cavity (31), the output shafts of the deslagging oil cylinders (32) are connected with deslagging blocks (29), switch doors (33) are also movably arranged on the deslagging cavity (31), the switch doors (33) are connected with switch oil cylinders (34), and the switch oil cylinders (34) drive the switch doors (33) to open or close the deslagging cavity (31).

10. The apparatus for recycling waste plastics with multi-stage melting and refining structure for removing slag according to claim 7, wherein said slag removing strip (27) is disposed to be pointed at the top of the portion extending out of the fine screen chamber (25).