Polyester waste recycling device and method of use thereof

Abstract

The present application relates to polyester waste recycling equipment field, especially to a kind of polyester waste recycling device and its use method.Polyester waste recycling device includes rectangular tank body, tank body top is equipped with cylinder, inside is divided into melting zone and filtrate zone from top to bottom, rectangular heating jacket is attached to the side wall of melting zone, bottom is equipped with filter screen, top is equipped with the filter plate that can be vertically sealed sliding along heating jacket inner wall and is connected with cylinder, filter plate is hinged to inclined push rod, push rod connects brush roller, brush roller can move left and right to clean filter screen with the up and down movement of filter plate.The polyester waste recycling device provided by the present application can improve the filtering accuracy and the filtering efficiency by the cooperation of filter plate and filter screen, the filter screen is cleaned synchronously during the filter pressing by the cooperation of filter plate, push rod and brush roller, so as to avoid the filter screen blockage, and the heating and melting efficiency is greatly improved by the cooperation of filter plate, heating jacket, heating plate and rotary control.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of polyester waste recycling equipment, in particular to a polyester waste recycling device and a use method thereof. BACKGROUND

[0002] Polyester is widely used in chemical fiber, plastic bottle, textile and other fields, and a large amount of polyester waste is generated every year. The polyester waste can be used to prepare dioctyl terephthalate after recycling. The polyester waste mainly includes waste blocks and waste silk. The waste silk refers to polyester fiber waste. The polyester fiber waste is not convenient to recycle, and it is not easy to remove the impurities in the polyester fiber waste by traditional crushing treatment.

[0003] The patent with application number CN 202020873437.7 discloses a waste recycling equipment for polyester fiber raw material production, which comprises a main body, a positioning shaft, a cover plate, an inlet, a reaction bin, a heating plate, a filter hole one, a fan, a crushing knife, a rotating rod, a servo motor, a filter plate, a stirring rod, an inlet, an outlet, a control valve and a controller. The upper left side of the main body is provided with a positioning shaft, and the outer side of the positioning shaft is provided with a cover plate. The upper end of the cover plate is provided with an inlet. The inside upper side of the main body is provided with a reaction bin, and the outer side of the reaction bin is provided with a heating plate. The lower end of the heating plate is provided with a filter hole one, and the lower end of the filter hole one is provided with a fan on both sides. The waste recycling equipment for polyester fiber raw material production can conveniently collect the impurities filtered by the filter hole one through the cooperation of the positioning shaft and the cover plate, avoid the influence of too many impurities on the subsequent collection of polyester fiber, and the heating plate can melt the polyester fiber. The above technical solution has the following problems. First, in order to improve the filtering precision, a large mesh size filter screen is needed. However, the viscosity of the melted polyester fiber waste is large, which will slow down the filtering speed and seriously affect the recycling efficiency. Second, the melting, cooling and crushing are carried out in the same equipment, and the hot and cold streams are mixed, which will reduce the melting efficiency, increase the energy consumption and affect the production efficiency. SUMMARY

[0004] To solve at least one of the above technical problems, the present application provides a polyester waste recycling device, which comprises a rectangular tank body. The top of the tank body is provided with a gas cylinder. The inside of the tank body is divided into a melting zone and a filtrate zone from top to bottom. A rectangular heating jacket is arranged on the side wall of the melting zone. A filter screen is arranged at the bottom of the melting zone. A pressure filter plate is arranged at the top of the melting zone and connected with the gas cylinder and can vertically and sealingly slide along the inner wall of the heating jacket. A push rod is hingedly connected to the pressure filter plate. A brush roller is connected to the push rod. The brush roller can move left and right to clean the filter screen with the up and down movement of the pressure filter plate.

[0005] Preferably, the tank body is provided with a discharge port at the bottom and a first feeding port at the top, the discharge port is provided with a lower sealing cover, the first feeding port is provided with an upper sealing cover, the filter plate is provided with a second feeding port which is connected with the first feeding port, and the second feeding port is provided with a filter plate sealing cover.

[0006] Preferably, the tank body is provided with a first sliding groove at the upper end, the first sliding groove is slidably provided with an upper sealing cover, the bottom is provided with a first feeding port, the lower end of the upper sealing cover is provided with an insertion block, and the upper end is provided with a handle; the upper end of the filter plate is provided with a second sliding groove, the second sliding groove is slidably provided with a filter plate sealing cover, the bottom is provided with a second feeding port, and the upper end of the filter plate sealing cover is provided with an insertion slot matched with the insertion block.

[0007] Preferably, the tank body includes a tank body with an open top and an upper cover, the tank body is provided with a discharge port at the bottom and a pressure relief valve at the upper side wall which is connected with the melting zone, the upper cover is provided with a first feeding port, the heating jacket includes a left side plate, a right side plate and a rear side plate fixed at the lower end of the upper cover, and a front side plate which is detachably connected with the left side plate and the right side plate, and the filter screen is connected with the inner walls of the left side plate, the right side plate and the rear side plate.

[0008] Preferably, the filter plate includes a rectangular plate body, the plate body is provided with a push rod receiving groove at the lower side wall and a brush roller receiving groove at the lower end, one push rod receiving groove is hingedly connected with one push rod, and a brush roller is arranged between the two push rods.

[0009] Preferably, the filter screen is in a "convex" shape, the center is a filtering zone, and the left and right sides are deposition zones, the front side plate and the rear side plate of the heating jacket are respectively provided with horizontal sliding grooves, the roller shaft of the brush roller is slidably connected with the horizontal sliding grooves and can move left and right in the filtering zone, the horizontal sliding grooves are in an inverted "U" shape, the horizontal section is consistent with the left and right lengths of the filtering zone, the two vertical sections are connected with the deposition zones, and the top of the vertical section is provided with a limiting part which limits the movement of the brush roller.

[0010] Preferably, the filter screen is provided with a heating plate below, the heating plate is hingedly connected with the heating jacket and can horizontally block the bottom of the heating jacket or form an inclined discharge port, and the heating plate is connected with a rotation control which drives the rotation of the heating plate.

[0011] Preferably, the rotation control includes a lifting rod fixed at the lower end of the filter plate, the free end of the lifting rod which slidably penetrates the filter screen and the heating plate is detachably connected with a support rod, the support rod cannot freely pass through the inclined discharge port formed by the heating plate, and when the filter plate is at the highest point, the support rod supports the heating plate to maintain a horizontal state.

[0012] Preferably, the heating plate comprises two symmetrical rotating plates, the bottom of the rotating plate is vertically provided with a limiting rod, the two ends are respectively hinged with the left side plate and the right side plate, the two rotating plates can rotate relatively to form a V-shaped feeding opening, the lifting rod slides through the butt joint of the two rotating plates, and the lifting rod and the supporting rod are both two and are arranged on the left and right sides close to the filter screen.

[0013] The application provides a use method of a polyester waste recycling device.

[0014] Step S1, the polyester waste is placed in the melting area, then the tank body is sealed, and the heating jacket is started to heat and melt the polyester waste;

[0015] Step S2, when the solid polyester waste is completely changed into a molten state, the pressure filter plate is driven by the air cylinder to move downward to filter the molten polyester waste, and with the downward movement of the pressure filter plate, the push rod hinged with the pressure filter plate pushes the brush roller to move horizontally to clean the filter screen for the first time;

[0016] Step S3, when the pressure filter plate descends to the lowest point, the brush roller moves to the terminal position, the molten polyester waste in the melting area is completely filtered into the filtrate area through the filter screen, and the filtering is completed;

[0017] Step S4, the pressure filter plate is driven by the air cylinder to move upward to reset, the push rod pulls the brush roller to move to the initial position to reset and clean the filter screen for the second time;

[0018] Step S5, the filtrate in the tank body is transported to the next process, cooled and broken to obtain pure polyester particles.

[0019] Compared with the prior art, the application has the following beneficial technical effects:

[0020] 1. The pressure filter plate and the filter screen cooperate to improve the filtering precision and efficiency of the molten polyester waste;

[0021] 2. The pressure filter plate, the push rod and the brush roller cooperate to drive the brush roller to move left and right to clean the filter screen during the upward and downward movement of the pressure filter plate, avoid the filter screen from being blocked, and ensure the filtering efficiency;

[0022] 3. The upper sealing cover at the top of the tank body and the pressing plate sealing cover on the pressure filter plate are inserted and matched, can realize synchronous sliding opening and closing, and are convenient to operate;

[0023] 4. The heating jacket, the filter screen, the air cylinder, the pressure filter plate, the push rod and the brush roller are directly or indirectly connected with the upper cover, and when the upper cover is lifted, the heating jacket, the filter screen, the air cylinder, the pressure filter plate, the push rod and the brush roller can be separated from the tank body at the same time, so that cleaning or maintenance is facilitated;

[0024] 5、Two push rods and brush rollers form a "U" structure, which can improve the stability of movement, a push rod storage groove and a brush roller storage groove are arranged on the lower end surface of the plate body, the push rod and the brush roller can be stored, the filter plate can be tightly attached to the filter screen, and the filter pressing efficiency is further improved;

[0025] 6、The filter screen is in a "convex" shape, the center is a filtering area, and the left and right sides are deposition areas, the two deposition areas can accommodate impurities pushed from the filtering area by the brush roller, limit the diffusion trend of impurities to the filtering area, and improve the filtering efficiency;

[0026] 7、A heating plate is arranged below the filter screen, the heating plate, the heating sleeve and the filter pressing plate can form a closed heating space, and the heating efficiency is greatly improved; the heating plate can be rotated to form an inclined discharge port under the control of the rotary control, and the filtrate is discharged into the filtrate area;

[0027] 8、The rotary control and the filter pressing plate form a linkage structure, which reduces the number of electrical components, when the filter pressing plate moves downward, the support rod is pushed away from the heating plate by the lifting rod of the rotary control, so that the heating plate rotates to form an inclined discharge port under the action of gravity, when the filter pressing plate moves upward to the highest point, the support rod is pulled upward by the lifting rod, and the heating plate is pushed to rotate to a horizontal state;

[0028] 9、The heating plate adopts a split structure, and the inclined discharge port formed by the heating plate is located at the center line of the filter screen by relatively rotating the two symmetrical turning plates, thereby improving the filtering stability;

[0029] In summary, the polyester waste recycling device provided by the present application can greatly improve the filtering efficiency while improving the filtering precision by cooperating the filter pressing plate with the filter screen, the filter pressing plate, the push rod and the brush roller are cooperated to clean the filter screen simultaneously during filter pressing, so as to avoid the blockage of the filter screen, and the filter pressing plate, the heating sleeve, the heating plate and the rotary control are cooperated to greatly improve the heating and melting efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of the present application;

[0031] Figure 2 is an exploded view of the structure of the tank body;

[0032] Figure 3 is an exploded view of the structure of the filter pressing plate;

[0033] Figure 4 is a state diagram of the filter pressing plate, the push rod, the brush roller and the filter screen when the filter pressing is finished;

[0034] Figure 5 is a structural schematic diagram of the filter screen;

[0035] Figure 6 is an exploded view of the heating sleeve;

[0036] Figure 7 This is a schematic diagram of the horizontal chute structure;

[0037] Figure 8 This is a schematic diagram of the heating plate structure;

[0038] Figure 9 This is an exploded view of the rotation control.

[0039] Explanation of reference numerals in the attached figures

[0040] 1. Tank body; 11. Tank body; 111. Discharge port; 12. Top cover; 121. First inlet; 122. First chute; 13. Top sealing cover; 131. Insert block; 132. Handle; 2. Cylinder; 3. Heating jacket; 31. Left side plate; 32. Right side plate; 33. Rear side plate; 34. Front side plate; 35. Horizontal chute; 351. Horizontal section; 352. Vertical section; 353. Limiting part; 4. Filter screen; 41. 1. Filtration zone; 42. Sedimentation zone; 5. Filter press plate; 51. Plate body; 511. Second feed inlet; 512. Second chute; 513. Push rod storage groove; 514. Brush roller storage groove; 52. Pressure plate sealing cover; 521. Slot; 6. Push rod; 7. Brush roller; 8. Heating plate; 81. Rotating plate; 82. Limiting rod; 9. Rotation control; 91. Lifting rod; 92. Support rod; 10. Melting zone; 20. Filtrate zone. Detailed Implementation

[0041] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples:

[0042] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention.

[0043] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. Example 1

[0044] Combined with appendix Figures 1-9This embodiment provides a polyester waste recycling and processing device, including a rectangular tank 1. The top of the tank 1 is equipped with a cylinder 2. The interior is divided into a melting zone 10 and a filtrate zone 20 from top to bottom. A rectangular heating sleeve 3 is attached to the side wall of the melting zone 10. A filter screen 4 is provided at the bottom. A filter press plate 5 is provided at the top, which is connected to the cylinder 2 and can slide vertically and sealed along the inner wall of the heating sleeve 3. The filter press plate 5 is hinged to an inclined push rod 6. The push rod 6 is connected to a brush roller 7. The brush roller 7 can move left and right as the filter press plate 5 moves up and down to clean the filter screen 4.

[0045] In the above technical solution, the melting zone 10 is used to heat and melt the polyester waste, changing it from a solid to a liquid state. The liquid polyester waste enters the filtrate zone 20 through the filter screen 4. Impurities in the polyester waste are trapped on the upper surface of the filter screen 4. The mesh size of the filter screen 4 determines the filtration effect; a larger mesh size results in higher filtration accuracy but slower filtration speed. To balance filtration accuracy and filtration speed, this invention uses a filter press 5 to press and filter the molten polyester waste. The brush roller 7 can automatically clean impurities in the central area of ​​the filter screen 4, preventing large-area clogging of the filter screen 4. Any parts not mentioned in the above technical solution can adopt conventional settings in the prior art. For example, since the melting zone 10 is used to heat and melt the polyester waste and the filtrate zone 20 is used to collect pure filtrate, the feed channel on the tank 1 can be set at the top or above the side wall of the tank 1, as long as it is connected to the melting zone 10. The discharge channel can be set at the bottom or below the side wall of the tank 1, as long as it is connected to the filtrate zone 20. This is a conventional setting and will not be elaborated further. Initially, the filter plate 5 is located at the top of the melting zone 10. In use, polyester waste is placed into the melting zone 10, then the tank 1 is sealed, and the heating jacket 3 is turned on to heat and melt the polyester waste. Once all the solid polyester waste has been converted to a molten state, the cylinder 2 is activated. The piston rod of the cylinder 2 extends, driving the filter plate 5 downwards to filter the molten polyester waste. As the filter plate 5 moves downwards, the push rod 6, hinged to the filter plate 5, pushes the brush roller 7 to move horizontally. In this embodiment, the push rod 6 pushes the brush roller 7 to move horizontally. The brush roller 7 moves to the right to perform the first cleaning of the filter screen 4. When the filter plate 5 descends to the lowest point, the brush roller 7 moves to the right limit position, at which point the filtration ends. The piston rod of the cylinder 2 shortens, driving the filter plate 5 to move upward and reset. The push rod 6 pulls the brush roller 7 to move to the left and reset, while simultaneously performing the second cleaning of the filter screen 4. The filtrate in the tank 1 is transported to the next process, where it is cooled and crushed to obtain pure polyester granules. The pure polyester granules can be used to produce chemical auxiliaries such as dioctyl terephthalate.

[0046] In this embodiment, the filter plate 5 and the filter screen 4 work together to improve the filtration accuracy of molten polyester waste while increasing the filtration efficiency. The filter plate 5, the push rod 6 and the brush roller 7 work together to drive the brush roller 7 to move left and right to clean the filter screen 4 during the up and down movement of the filter plate 5, thus preventing the filter screen 4 from clogging and ensuring filtration efficiency.

[0047] In one specific technical solution, the tank body 1 is provided with a discharge port 111 at the bottom and a first inlet port 121 at the top. The discharge port 111 is provided with a lower sealing cover, the first inlet port 121 is provided with an upper sealing cover 13, the filter press plate 5 is provided with a second inlet port 511 that is connected to the first inlet port 121, and the second inlet port 511 is provided with a pressure plate sealing cover 52.

[0048] In the above technical solution, the feeding channel of the melting zone 10 is set at the top of the tank 1, and a first feeding port 121 is opened at the top of the tank 1. A second feeding port 511 is set on the filter press plate 5 to connect with the first feeding port 121. Polyester waste can enter the melting zone 10 from the first feeding port 121 and the second feeding port 511. The first feeding port 121 is sealed by the upper sealing cover 13 to prevent heat loss in the tank 1 and improve the melting efficiency. The pressure plate sealing cover 52 seals the second feeding port 511 to ensure the filtration effect of the filter press plate 5.

[0049] In one specific technical solution, the first feed port 121 and the second feed port 511 are coaxial circular threaded holes with the same thread direction. The upper sealing cover 13 is a circular cover that is threadedly connected to the first feed port 121. Its lower end face is provided with a rectangular block and its upper end face is provided with a screw handle. The pressure plate sealing cover 52 is a circular cover that is threadedly connected to the second feed port 511. Its upper end face is provided with a rectangular groove that cooperates with the rectangular block. In the initial state, the filter plate 5 is located at the top of the melting zone 10, and the second feed port 511 abuts against the first feed port 121, forming a continuous thread. The rectangular block of the upper sealing cover 13 is inserted into the rectangular groove of the pressure plate sealing cover 52. At this time, by turning the handle, the upper sealing cover 13 is rotated, and the upper sealing cover 13 and the pressure plate sealing cover 52 move upward synchronously. When the pressure plate sealing cover 52 is disengaged from the first feed port 121, the first feed port 121 and the second feed port 511 are fully opened, and materials can be fed into the melting zone 10. After the feeding is completed, the reverse operation can be used to seal the first feed port 121 and the second feed port 511.

[0050] In one specific technical solution, the upper end face of the tank body 1 is provided with a first sliding groove 122, an upper sealing cover 13 is slidably disposed in the first sliding groove 122, a first feed inlet 121 is provided at the bottom, an insert block 131 is provided at the lower end face of the upper sealing cover 13, and a handle 132 is provided at the upper end face; the upper end face of the filter press plate 5 is provided with a second sliding groove 512, a pressure plate sealing cover 52 is slidably disposed in the second sliding groove 512, a second feed inlet 511 is provided at the bottom, and a slot 521 that mates with the insert block 131 is provided at the upper end face of the pressure plate sealing cover 52.

[0051] In the above technical solution, the upper sealing cover 13 and the pressure plate sealing cover 52 can be inserted and engaged through the insert block 131 and the slot 521, so that the pressure plate sealing cover 52 can open and close synchronously with the upper sealing cover 13; the upper sealing cover 13 and the first sliding groove 122, as well as the pressure plate sealing cover 52 and the second sliding groove 512, can be slidably engaged in any suitable structure and manner. In this embodiment, the first sliding groove 122 and the second sliding groove 512 are both rectangular sliding grooves. The rectangular sliding groove is divided into a small groove and a large groove from top to bottom. The upper sealing cover 13 and the pressure plate sealing cover 52 are rectangular blocks that slidably engage with the large groove. One end of the large groove along the sliding direction is provided with an opening for the rectangular block to enter. An end cap is detachably provided at the opening. In the initial state, the filter press plate 5 is located at the top of the melting zone 10, and the insert block 131 on the lower end face of the upper sealing cover 13 is engaged with the filter press plate 52. Block 131 is inserted into the slot 521 of the pressure plate sealing cover 52. At this time, pushing the upper sealing cover 13 to slide (in this embodiment, it slides backward) will open the first feed port 121. The pressure plate sealing cover 52 and the upper sealing cover 13 slide synchronously to open the second feed port 511. At this time, material can be added to the melting zone 10. After the material is added, the upper sealing cover 13 is slid in the opposite direction to block the first feed port 121 and the second feed port 511. When all the polyester waste in the melting zone 10 is melted, the cylinder 2 drives the filter plate 5 to move down for filtration. The pressure plate sealing cover 52 on the filter plate 5 moves away from the upper sealing cover 13 on the tank body 1. The upper sealing cover 13 and the pressure plate sealing cover 52 are unlocked. When filtration is completed, the filter plate 5 rises and resets, and the upper sealing cover 13 and the pressure plate sealing cover 52 re-enter the insertion and locking state. Preferably, the handle 132 of the upper sealing cover 13 is connected to a displacement drive such as a hydraulic cylinder or a rodless cylinder, so that the upper sealing cover 13 can be slid through the displacement drive, thereby further reducing the labor intensity of workers.

[0052] In one specific technical solution, the tank body 1 includes a tank body 11 with an opening at the top and a top cover 12. The tank body 11 has a discharge port 111 at the bottom and a pressure relief valve (not shown in the figure) communicating with the melting zone 10 on the upper side wall. The top cover 12 has a first feed port 121. The heating sleeve 3 includes a left side plate 31, a right side plate 32 and a rear side plate 33 fixed to the lower end face of the top cover 12, and a front side plate 34 detachably connected to the left side plate 31 and the right side plate 32. The filter screen 4 is detachably connected to the inner wall of the heating sleeve 3.

[0053] In the above technical solution, the pressure relief valve connected to the melting zone 10 can improve the safety of the equipment. The upper cover 12 is fixedly connected to the heating sleeve 3, which facilitates cleaning and maintenance of the filter screen 4. When it is necessary to clean or maintain the filter screen 4, the upper cover 12 is lifted up, and the heating sleeve 3 and cylinder 2 connected to the upper cover 12, the filter screen 4 connected to the heating sleeve 3, the filter plate 5 connected to the cylinder 2, the push rod 6 and brush roller 7 connected to the filter plate 5 are simultaneously separated from the tank body 11. At this time, the front side plate 34 is separated from the left side plate 31 and the right side plate 32, and cleaning or maintenance operations can be performed. In this embodiment, the front side plate 34 is detachably connected to the left side plate 31 and the right side plate 32 by screws.

[0054] In one specific technical solution, the filter press plate 5 includes a rectangular plate body 51. The front and rear side walls of the plate body 51 are provided with push rod storage grooves 513, and the lower end face is provided with a brush roller storage groove 514. A push rod 6 is hinged to the side wall of one push rod storage groove 513, and a brush roller 7 is provided between two push rods 6.

[0055] In the above technical solution, the brush roller 7 can be fixedly connected to the push rod 6 or pivotally connected. The two push rods 6 and the brush roller 7 form a "U"-shaped structure, which can improve the stability of movement. Figure 4 As shown, a push rod storage groove 513 and a brush roller storage groove 514 are provided on the lower end face of the plate body 51, which can store the push rod 6 and the brush roller 7, so that the filter plate 5 can be tightly attached to the filter screen 4, further improving the filter pressing efficiency.

[0056] In one specific technical solution, the filter screen 4 is convex, with a filtration zone 41 at the center and deposition zones 42 on the left and right sides. The front side plate 34 and rear side plate 33 of the heating sleeve 3 are respectively provided with horizontal sliding grooves 35. The roller shaft of the brush roller 7 is slidably engaged with the horizontal sliding grooves 35 and can move left and right in the filtration zone 41. The horizontal sliding groove 35 is inverted U-shaped, with the horizontal section 351 having the same length as the left and right sides of the filtration zone 41. The two vertical sections 352 are connected to the deposition zones 42. The top of the vertical section 352 is provided with a limiting part 353 to restrict the movement of the brush roller 7.

[0057] In the above technical solution, the two sedimentation zones 42 can collect the filtered impurities, limit the diffusion trend of impurities to the filtration zone 41, and improve the filtration efficiency. The sedimentation zone 42 can use a single-layer filter screen, and the filtration zone 41 can use a double-layer filter screen, thereby directly forming a height difference. The horizontal chute 35 can limit the left and right sliding distance of the brush roller 7, making it consistent with the left and right length of the filtration zone 41. The horizontal chute 35 is inverted "U" shape, which can remove impurities entering the horizontal section 351 in time and ensure the movement stability of the brush roller 7. In use, the brush roller 7 first slides to the right from the horizontal section 351 of the horizontal chute 35. During the sliding process, the roller shaft of the brush roller 7 pushes the impurities accumulated in the horizontal section 351 to the right. When it moves to the rightmost end of the filtration zone 41, the impurities in the horizontal section 351 enter the sedimentation zone 42 through the vertical section 352.

[0058] In one specific technical solution, a heating plate 8 is provided below the filter screen 4. The heating plate 8 is hinged to the heating sleeve 3 and can horizontally block the bottom of the heating sleeve 3 or form an inclined discharge port. The heating plate 8 is connected to a rotation control 9 that drives its rotation.

[0059] In the above technical solution, the rotary control 9 can directly adopt conventional rotary drive components such as motors. The motor is set on the tank body 1, and the rotating shaft of the motor is connected to the rotating shaft (i.e., hinge shaft) of the heating plate 8. In the initial state, the heating plate 8 is in a horizontal state, sealing the bottom of the heating sleeve 3. The heating plate 8, the heating sleeve 3, and the filter press 5 form a closed heating space, which can greatly improve the heating efficiency. When all the polyester waste is melted, the rotary control 9 drives the heating plate 8 to rotate, forming an inclined discharge port, and discharges the filtrate that has passed through the filter screen 4 into the filtrate zone 20.

[0060] In one specific technical solution, the rotating control 9 includes a lifting rod 91 fixedly disposed on the lower end face of the filter plate 5. The lifting rod 91 slides through the free end of the filter screen 4 and the heating plate 8 and is detachably connected to a support rod 92. The support rod 92 cannot freely pass through the inclined discharge port formed by the heating plate 8. When the filter plate 5 is at the highest point, the support rod 92 supports the heating plate 8 to maintain a horizontal state.

[0061] In the above technical solution, the rotary control 9 and the filter press plate 5 form a linkage structure, which can control the heating plate 8 to enter the horizontal or inclined state without the need for additional conventional rotary drive components such as motors, thus reducing the number of electrical components used. It should be noted that the heating plate 8 can switch between the horizontal and inclined states, which means that the heating plate 8 will not enter a completely vertical state. Usually, a limiting component is used to limit the inclination of the heating plate 8. In the initial state, the support rod 92 connected to the filter press plate 5 is close to the lower end surface of the heating plate 8, supporting the heating plate 8 to maintain water... In the flat state, the polyester waste in the melting zone 10 can be heated and melted. After all the polyester waste has melted, it enters the filter pressing process. The cylinder 2 drives the filter press plate 5 and the support rod 92 connected to the filter press plate 5 to move downward. The support rod 92 releases its support on the heating plate 8. Under the action of gravity, the heating plate 8 rotates to form an inclined discharge port. The filtered filtrate enters the filtrate zone 20 from the discharge port. After the discharge is completed, the cylinder 2 drives the filter press plate 5 and the support rod 92 to move upward. The support rod 92 pushes the heating plate 8 back into the horizontal state.

[0062] In one specific technical solution, the heating plate 8 includes two symmetrically arranged rotating plates 81. The bottom of the rotating plate 81 is provided with a limiting rod 82, and the two ends are respectively hinged to the left side plate 31 and the right side plate 32. The two rotating plates 81 can rotate relative to each other to form a "V" shaped discharge port. The lifting rod 91 slides through the joint of the two rotating plates 81. There are two lifting rods 91 and two support rods 92, which are arranged near the left and right sides of the filter screen 4.

[0063] In the above technical solution, the heating plate 8 adopts a split structure, so that the inclined discharge port formed by the heating plate 8 is located at the center line of the filter screen 4, thereby improving the filtration stability.

[0064] The working principle and process of this embodiment are as follows: Polyester waste is placed in the melting zone 10. At this time, the filter plate 5 and the support rod 92 are both at their highest points, and the support rod 92 supports the heating plate 8 to maintain a horizontal state. Then, the tank 1 is sealed, and the heating jacket 3 and the heating plate 8 are turned on to heat and melt the polyester waste. When all the solid polyester waste is transformed into a molten state, the filter plate 5 is driven downward by the cylinder 2 to filter the molten polyester waste. As the filter plate 5 moves downward, the push rod 6, which is hinged to the filter plate 5, pushes the brush roller 7 to move horizontally to perform the first cleaning of the filter screen 4. At the same time, the support rod 92, which is connected to the filter plate 5 through the lifting rod 91, moves downward, and the heating plate 8, which is hinged to the inner wall of the heating jacket 3, loses the support rod 92. After being supported, the filter plate rotates under gravity, forming an inclined discharge port. The molten polyester waste is filtered through the filter screen 4 and enters the filtrate zone 20 through the inclined discharge port. When the filter plate 5 descends to the lowest point, the brush roller 7 moves to the end position. The molten polyester waste in the melting zone 10 is filtered through the filter screen 4 and enters the filtrate zone 20, thus ending the filtration process. The cylinder 2 drives the filter plate 5 to move upward and reset, and the push rod 6 pulls the brush roller 7 to move back to the initial position to reset, performing a second cleaning of the filter screen 4. At the same time, the support rod 92 moves upward and resets, pushing the heating plate 8 back into a horizontal state and sealing the bottom opening of the heating jacket 3. The filtrate in the tank 1 is then transported to the next process for cooling and crushing to obtain pure polyester granules. Example 2

[0065] Combined with appendix Figures 1-8 This embodiment provides a method for using a polyester waste recycling and processing device, including the following steps:

[0066] Step S1: Place the polyester waste into the melting zone 10, then seal the tank 1 and turn on the heating jacket 3 to heat and melt the polyester waste;

[0067] Step S2: After all the solid polyester waste is transformed into a molten state, the cylinder 2 drives the filter plate 5 to move downward to filter the molten polyester waste. As the filter plate 5 moves downward, the push rod 6, which is hinged to the filter plate 5, will push the brush roller 7 to move horizontally to clean the filter screen 4 for the first time.

[0068] Step S3: When the filter plate 5 descends to the lowest point, the brush roller 7 moves to the end position. The molten polyester waste in the melting zone 10 enters the filtrate zone 20 after being filtered by the filter screen 4, and the filter press ends.

[0069] Step S4: Drive the filter plate 5 upward to reset by the cylinder 2, and push rod 6 pulls the brush roller 7 to move back to the initial position to reset, and perform a second cleaning of the filter screen 4.

[0070] Step S5: The filtrate in tank 1 is transported to the next process for cooling and crushing to obtain pure polyester granules.

[0071] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A polyester waste recycling and processing device, comprising a rectangular tank (1), characterized in that, The tank (1) is equipped with a cylinder (2) at the top. The interior of the tank (1) is divided into a melting zone (10) and a filtrate zone (20) from top to bottom. A rectangular heating sleeve (3) is attached to the side wall of the melting zone (10). A filter screen (4) is provided at the bottom of the melting zone (10). A filter press plate (5) is provided at the top of the melting zone (10) and is connected to the cylinder (2) and can slide vertically and sealed along the inner wall of the heating sleeve (3). The filter press plate (5) is hinged to an inclined push rod (6). The push rod (6) is connected to a brush roller (7). The brush roller (7) can move left and right as the filter press plate (5) moves up and down to clean the filter screen (4). The filter press plate (5) includes a rectangular plate body (51), and a push rod storage groove (513) is provided on the lower side wall of the front and rear side walls of the plate body (51). A brush roller storage groove (514) is provided on the lower end face of the plate body (51). A push rod (6) is hinged to the side wall of one push rod storage groove (513), and a brush roller (7) is provided between two push rods (6). A heating plate (8) is provided below the filter screen (4). The heating plate (8) is hinged to the heating sleeve (3) and can horizontally block the bottom of the heating sleeve (3) or form an inclined discharge port. The heating plate (8) is connected to a rotation control (9) that drives its rotation. The rotating control (9) includes a lifting rod (91) fixedly installed on the lower end face of the filter plate (5). The lifting rod (91) slides through the free end of the filter screen (4) and the heating plate (8) and can be detachably connected to a support rod (92). The support rod (92) cannot freely pass through the inclined discharge port formed by the heating plate (8). When the filter plate (5) is at the highest point, the support rod (92) supports the heating plate (8) to maintain a horizontal state. The heating plate (8) includes two symmetrically arranged rotating plates (81). The bottom of the rotating plate (81) is vertically provided with a limiting rod (82). The rotating plate (81) is hinged to the left side plate (31) and the right side plate (32). The two rotating plates (81) can rotate relative to each other to form a "V" shaped discharge port. The lifting rod (91) slides through the joint of the two rotating plates (81). There are two lifting rods (91) and two support rods (92). The lifting rods (91) and the support rods (92) are both arranged close to the left and right sides of the filter screen (4).

2. The polyester waste recycling and processing device according to claim 1, characterized in that, The tank (1) has a discharge port (111) at the bottom and a first inlet port (121) at the top. The discharge port (111) is provided with a lower sealing cover, and the first inlet port (121) is provided with an upper sealing cover (13). The filter press plate (5) is provided with a second inlet port (511) that is connected to the first inlet port (121), and the second inlet port (511) is provided with a pressure plate sealing cover (52).

3. The polyester waste recycling and processing device according to claim 2, characterized in that, The upper surface of the tank (1) is provided with a first sliding groove (122), and an upper sealing cover (13) is slidably provided in the first sliding groove (122). A first feed inlet (121) is provided at the bottom of the first sliding groove (122). An insert (131) is provided on the lower surface of the upper sealing cover (13), and a handle (132) is provided on the upper surface of the upper sealing cover (13). The upper surface of the filter press (5) is provided with a second sliding groove (512), and a pressure plate sealing cover (52) is slidably provided in the second sliding groove (512). A second feed inlet (511) is provided at the bottom of the second sliding groove (512), and a slot (521) that cooperates with the insert (131) is provided on the upper surface of the pressure plate sealing cover (52).

4. The polyester waste recycling and processing device according to claim 1, characterized in that, The tank (1) includes a tank body (11) with an opening at the top and a top cover (12). The tank body (11) has a discharge port (111) at the bottom. The tank body (11) has a pressure relief valve connected to the melting zone (10) on the upper side wall. The top cover (12) has a first feed port (121). The heating jacket (3) includes a left side plate (31), a right side plate (32) and a rear side plate (33) fixed to the lower end face of the top cover (12) and a front side plate (34) detachably connected to the left side plate (31) and the right side plate (32). The filter screen (4) is connected to the inner wall of the left side plate (31), the right side plate (32) and the rear side plate (33).

5. The polyester waste recycling and processing device according to claim 4, characterized in that, The filter screen (4) is convex, with the center being the filtration zone (41) and the left and right sides being the deposition zones (42). The front side plate (34) and rear side plate (33) of the heating sleeve (3) are respectively provided with horizontal sliding grooves (35). The roller shaft of the brush roller (7) slides in cooperation with the horizontal sliding groove (35) and can move left and right in the filtration zone (41). The horizontal sliding groove (35) is inverted "U" shape. The horizontal section (351) is consistent with the left and right length of the filtration zone (41). The two vertical sections (352) are connected to the deposition zone (42). The top of the vertical section (352) is provided with a limiting part (353) to restrict the movement of the brush roller (7).

6. A method of using a polyester waste recycling and processing device, characterized in that, Using the polyester waste recycling and processing device according to any one of claims 1-5 includes the following steps: Step S1: Place the polyester waste into the melting zone (10), then seal the tank (1), and turn on the heating jacket (3) to heat and melt the polyester waste; Step S2: After all the solid polyester waste is transformed into a molten state, the cylinder (2) drives the filter plate (5) to move downward to filter the molten polyester waste. As the filter plate (5) moves downward, the push rod (6) hinged to the filter plate (5) will push the brush roller (7) to move horizontally to clean the filter screen (4) for the first time. Step S3: When the filter press plate (5) descends to the lowest point, the brush roller (7) moves to the end position. The molten polyester waste in the melting zone (10) enters the filtrate zone (20) after being filtered by the filter screen (4), and the filter press ends. Step S4: Drive the filter plate (5) upward to reset by the cylinder (2), and pull the brush roller (7) back to the initial position by the push rod (6) to perform a second cleaning of the filter screen (4); Step S5: The filtrate in tank (1) is transported to the next process for cooling and crushing to obtain pure polyester granules.

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