Process for the removal of water from polyester resin materials

Abstract

The application discloses a kind of polyester resin material water removal processing technology, comprising the following steps: step one, by the feeding hopper of water removal equipment is transported, polyester material is filtered for the first time;Step two, polyester resin input by feeding hopper is transported by conveying belt, and is dried by hot air;Step three, heat recovery is utilized, then water vapor is extruded;Step four, by the setting of drainage slope, after extrusion, moisture filtered falls into drainage slope, and water is discharged by drain pipe and is cleaned, the present application relates to polyester resin material processing technical field.The polyester resin material water removal processing technology of the application, by the side baffle between the conveying belt of annular setting forms closed structure, so that the hot air blown by blowing hopper can only be output through the air hole in the conveying belt, increase drying effect, and hot air can be recycled, effectively recycle internal hot air, and drying effect is good, in energy saving while can guarantee water removal effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyester resin material processing, in particular to a polyester resin material water removal processing technology. BACKGROUND

[0002] Polyester resin chips are produced by melting and extruding polyester resin raw materials through a melt extruder and a die, rapidly cooling them in a cooling water tank, and then cutting the long strip-shaped polyester material into granules by a pelletizer. If the produced polyester resin chips are directly put into the extrusion system of the production line, a large amount of water will be heated to produce gas, and the polyester resin will be oxidized and condensed into oligomers when the temperature rises to the melting state. The product produced by the stretching of the polyester melt material through the die extrusion equipment will be unstable and of poor quality. The untreated oxide and oligomer will cause defects such as crystal points, gels, and bubbles on the surface of the product. Generally, the surface of the water-cooled polyester resin granules needs to be dried by a drying device to remove the water on the surface of the polyester resin granules. At the same time, the oxide and oligomer can be volatilized at an appropriate temperature.

[0003] According to the polyester resin drying device with temperature control and the drying method thereof according to patent number CN115091646A, a large amount of polyester resin cannot be processed at one time, and the drying energy consumption is high, and a circulating air duct cannot be formed inside for recycling. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a polyester resin material water removal processing technology to solve the above problems.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme: a polyester resin material water removal processing technology comprising the following steps:

[0006] Step one, the polyester material is filtered through the first filter by the feed hopper of the water removal equipment;

[0007] Step two, the polyester resin input through the feed hopper is conveyed by the conveying belt and dried by hot air;

[0008] Step three, the hot air is recycled and then the water vapor is extruded;

[0009] Step four, the water filtered out after extrusion falls into the drainage slope through the setting of the drainage slope, and the water is discharged and cleaned by the drain pipe;

[0010] Step five, the polyester resin is stirred.

[0011] As a further scheme of the present application: in the first step, the polyester material falls above the primary filter screen, and the polyester resin is filtered through the primary filter screen, and the polyester material is conveyed through the movement of the conveying belt, and the polyester material falling above the conveying belt is conveyed away by the conveying belt, and then the polyester resin behind falls above the conveying belt and continues to be conveyed, and the polyester resin is laid flat, and the heating area of the polyester resin is increased.

[0012] As a further scheme of the present application: in the second step, the hot air blower blows hot air to the conveying belt through the air blowing nozzle, and the hot air is blown out through the air holes to dry the water vapor in the polyester resin.

[0013] As a further scheme of the present application: in the second step, the side blocking plate forms a closed structure between the annularly arranged conveying belts, so that the hot air blown by the air blowing nozzle can only be output through the air holes in the conveying belts, and the drying effect is increased.

[0014] As a further scheme of the present application: in the third step, the hot air is recycled through the air suction port of the hot air blower, and the hot air carrying water vapor in the partitioned cavity on both sides of the partition plate is sucked back through the air suction pipeline for reuse, and the hot air containing water vapor sucked through the air suction pipeline is filtered through the water absorption filter screen, and the hot air is reused after the water vapor is absorbed.

[0015] As a further scheme of the present application: in the third step, the water vapor is squeezed out through the power mechanism driving the squeezing roller to rotate and sliding along the fixed frame, and the water in the water absorption filter screen is squeezed out through the squeezing roller cooperating with the fixed frame on one side, and the water in the water absorption filter screen falls below the processing box.

[0016] As a further scheme of the present application: in the fifth step, the polyester resin is stirred through the rotating rod driving the scraping rod to rotate, and the polyester resin is stirred and laid flat, which is convenient for cleaning the water vapor inside, and the polyester resin is agitated by the hot air blowing, which effectively volatilizes and recovers the water vapor, and the water removal effect is better.

[0017] As a further scheme of the present application: two groups of circulating air paths are formed in the processing box.

[0018] The water removal device comprises a processing box, an inner cavity of the processing box is provided with a conveying assembly, the conveying assembly comprises a transmission roller rotationally arranged in the inner cavity of the processing box, the surface of the transmission roller is in transmission connection with a conveying belt, the surface of the conveying belt is provided with air holes, and the side edge of the conveying belt is fixedly connected with a side blocking edge. The polyester resin material is conveyed through the conveying belt. The inner cavity of the processing box is fixedly connected with a blowing hopper below the conveying belt. The blowing port of the blowing hopper faces the lower side of the conveying belt. The conveying belt is blown through the blowing hopper. Hot air is blown out through the air holes to blow out and dry the water vapor in the polyester resin. The lower side of the blowing hopper is fixedly connected with side blocking plates on both sides of the conveying belt. The side blocking plates form a closed structure between the annularly arranged conveying belts, so that the hot air blown out by the blowing hopper can only be output through the air holes in the conveying belt, thereby increasing the drying effect. The inner cavity of the processing box is fixedly connected with a hot air blower. The air outlet of the hot air blower is in communication with one end of the blowing hopper through an air outlet pipeline. The inner cavity of the processing box is fixedly connected with partition plates on both sides of the hot air blower. The top of each partition plate is provided with an inner groove matched with the inner cavity of the side blocking edge. The partition plates form a partitioned cavity on both sides. The air suction port of the hot air blower is in communication with the inner cavity of the partition plate through an air suction pipeline. The hot air carrying water vapor in the partitioned cavities on both sides of the partition plate is sucked back through the air suction pipeline for reutilization. The inner cavity of the processing box is fixedly connected with a support frame. One side of the support frame is fixedly connected with one side of the partition plate. The support frame is composed of interlaced stainless steel wires. One side of the support frame is fixedly connected with a water absorption filter screen. The hot air containing water vapor sucked through the air suction pipeline is filtered through the water absorption filter screen. After the water vapor is absorbed, the hot air is reused, thereby saving energy. Two groups of circulating air paths are formed in the processing box, and the circulation effect is good. The inner cavity of the processing box is fixedly connected with a fixed frame. One side of the fixed frame is fixedly connected with one side of the partition plate. The inner cavity of the fixed frame is slidingly connected with an extrusion roller. The surface of the extrusion roller abuts against the surface of the water absorption filter screen. The extrusion roller is driven by an external power mechanism. The extrusion roller is driven to rotate by the power mechanism, thereby driving the extrusion roller to slide along the fixed frame. The fixed frame on one side extrudes the water absorption filter screen, thereby extruding the water in the water absorption filter screen. The water in the water absorption filter screen drops to the lower side of the processing box. The lower side of the processing box is provided with a drainage inclined surface. The lowest point of the drainage inclined surface is in communication with a drainage pipe. The water filtered after extrusion falls into the drainage inclined surface through the setting of the drainage inclined surface, and then the water is discharged through the drainage pipe for cleaning. The inner cavity of the processing box is rotationally provided with a rotating rod. The surface of the rotating rod is fixedly connected with a scraping rod. One end of the scraping rod abuts against the polyester resin on the surface of the conveying belt. The rotating rod drives the scraping rod to rotate, thereby driving the polyester resin to rotate, and the polyester resin is disturbed and laid flat, thereby facilitating the cleaning of the internal water vapor and the blowing of the hot air to agitate the polyester resin, thereby effectively volatilizing and recycling the water vapor, and the water removal effect is better.The side of the processing box is communicated with a feeding hopper, and the inner cavity of the feeding hopper is fixedly connected with a primary filter screen, through the arrangement of the primary filter screen, the polyester resin is filtered for the first time, and when the polyester resin is conveyed through the conveying belt, the polyester resin can be laid flat, and the heating area of the polyester resin can be increased.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1、The present application forms a closed structure between the conveying belts arranged in a ring shape through the side shielding plate, so that the hot air blown out of the air blowing hopper can only be output through the air permeable holes in the conveying belts, the drying effect is increased, the hot air can be recycled, the internal hot air is effectively recovered, the drying effect is good, and the water removal effect is ensured while saving energy.

[0021] 2、The present application drives the scraper rod to rotate through the rotating rod, stirs the polyester resin, and drives the polyester resin to be laid flat, so that the internal water vapor can be cleaned, and the polyester resin is agitated through the hot air blowing, so that the water vapor is effectively volatilized and treated, and the water removal effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural front view of the present application;

[0023] Figure 2 It is a structural side view of the present application;

[0024] Figure 3 It is a structural schematic view of the conveying belt of the present application;

[0025] Figure 4 It is a structural schematic view of the conveying belt of the present application; Figure 2 It is a partial enlarged view of A in the present application;

[0026] Figure 5 It is a structural schematic view of the support frame of the present application.

[0027] In the figure: 1, processing box; 2, feeding hopper; 3, primary filter screen; 4, discharge port; 5, air heater; 6, water absorption filter screen; 7, support frame; 8, fixed frame; 9, extrusion roller; 10, air suction pipeline; 11, air outlet pipeline; 12, partition plate; 13, drainage slope; 14, drainage pipe; 15, transmission roller; 16, conveying belt; 17, side retaining edge; 18, air blowing hopper; 19, side shielding plate; 20, rotating rod; 21, scraper rod; 22, air permeable hole. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined inventive objectives, the specific embodiments, structures, features and effects according to the present application are described in detail below in conjunction with the drawings and preferred embodiments.

[0029] Please refer to Figures 1-5 The present application provides a technical solution: a polyester resin material dewatering process, comprising the following steps:

[0030] Step one, through the feeding hopper 2 of the dewatering equipment, the polyester material falls above the primary filter screen 3, and the polyester resin is filtered for the first time through the setting of the primary filter screen 3, and is conveyed through the movement of the conveying belt 16. During conveying, the polyester material falling above the conveying belt 16 is carried away by the conveying belt 16, and then the polyester resin behind falls above the conveying belt 16 and continues to be conveyed under extrusion. The polyester resin can be laid flat, increasing the heating area of the polyester resin.

[0031] Step two, the polyester resin input through the feeding hopper 2 is conveyed by the conveying belt 16, and the air blower 5 blows air at this time, blows air at the conveying belt 16 through the air blowing hopper 18, blows hot air through the air holes 22 to dry the water vapor in the polyester resin, and the lower part of the air blowing hopper 18 is fixedly connected with the side blocking plate 19 located on both sides of the conveying belt 16. The side blocking plate 19 forms a closed structure between the annularly arranged conveying belts 16, so that the hot air blown out of the air blowing hopper 18 can only be output through the air holes 22 in the conveying belt 16, increasing the drying effect.

[0032] Step three, the hot air carrying water vapor in the cavity separated by the partition plate 12 is drawn back through the air suction pipe 10 of the air blower 5 for reuse, and the hot air containing water vapor drawn through the air suction pipe 10 is filtered through the setting of the water absorption filter screen 6. After the water vapor is absorbed, the hot air is reused. The power mechanism drives the extrusion roller 9 to rotate, drives the extrusion roller 9 to slide along the fixed frame 8, and extrudes the water absorption filter screen 6 together with the fixed frame 8 on one side to extrude the water in the water absorption filter screen 6. The water in the water absorption filter screen 6 drops to the lower part of the processing box 1.

[0033] Step four, through the setting of the drainage slope 13, the water filtered after extrusion falls into the drainage slope 13, and then the water is discharged through the drain pipe 14 for cleaning;

[0034] Step five, the scraper 21 is rotated by the rotating rod 20, the polyester resin is rotated, the polyester resin is disturbed and laid flat, which is convenient for cleaning the internal water vapor, and the polyester resin is agitated by hot air blowing, effectively volatilizing and recycling the water vapor, and the dewatering effect is better.

[0035] In the first step, the polyester material falls above the primary filter screen 3, and the polyester resin is filtered through the primary filter screen 3. The polyester material is conveyed by the movement of the conveying belt 16. The polyester material falling above the conveying belt 16 is carried away by the conveying belt 16, and then the polyester resin behind falls above the conveying belt 16 and continues to be conveyed under the extrusion. The polyester resin can be laid flat, and the heating area of the polyester resin is increased.

[0036] In the second step, the hot air blower 5 blows hot air to the conveying belt 16 through the air blowing duct 18, and the water vapor in the polyester resin is blown out and dried.

[0037] In the second step, the side baffle 19 forms a closed structure between the annularly arranged conveying belts 16, so that the hot air blown by the air blowing duct 18 can only be output through the air holes 22 in the conveying belts 16, and the drying effect is increased.

[0038] In the third step, the hot air is recycled by the hot air blower 5 through the exhaust duct 10 to extract the hot air carrying water vapor in the cavity on both sides of the partition plate 12 for reuse. The water vapor in the hot air extracted through the exhaust duct 10 is filtered by the water absorption filter screen 6, and the hot air is reused after the water vapor is absorbed.

[0039] In the third step, the water vapor is extracted by rotating the extrusion roller 9 driven by the power mechanism, sliding the extrusion roller 9 along the fixed frame 8, and extruding the water vapor in the water absorption filter screen 6 by the fixed frame 8 on one side. The water in the water absorption filter screen 6 falls below the processing box 1.

[0040] In the fifth step, the polyester resin is stirred by rotating the scraper 21 driven by the rotating rod 20, and the polyester resin is stirred and laid flat. The internal water vapor is cleaned, and the polyester resin is agitated by the hot air blowing to effectively evaporate and recover the water vapor, and the water removal effect is better.

[0041] Two groups of circulating air paths are formed in the processing box 1.

[0042] The water removal device comprises a processing box 1, an inner cavity of the processing box 1 is provided with a conveying assembly, the conveying assembly comprises a transmission roller 15 rotatably arranged in the inner cavity of the processing box 1, the surface of the transmission roller 15 is in transmission connection with a conveying belt 16, the surface of the conveying belt 16 is provided with air holes 22, and the side edges of the conveying belt 16 are fixedly connected with side blocking edges 17. The polyester resin material is conveyed through the conveying belt 16. The inner cavity of the processing box 1 is fixedly connected with a blowing hopper 18 located below the conveying belt 16. The blowing port of the blowing hopper 18 faces the lower side of the conveying belt 16. The conveying belt 16 is blown through the blowing hopper 18. Hot air is blown out through the air holes 22 to blow out the water vapor in the polyester resin and dry the polyester resin. The lower side of the blowing hopper 18 is fixedly connected with side shielding plates 19 located on both sides of the conveying belt 16. The side shielding plates 19 form a closed structure between the annularly arranged conveying belts 16, so that the hot air blown out by the blowing hopper 18 can only be output through the air holes 22 in the conveying belt 16, thereby increasing the drying effect. The inner cavity of the processing box 1 is fixedly connected with a hot air machine 5. The air outlet of the hot air machine 5 is communicated with one end of the blowing hopper 18 through an air outlet pipeline 11. The inner cavity of the processing box 1 is fixedly connected with partition plates 12 located on both sides of the hot air machine 5. The top of each partition plate 12 is provided with an inner groove matched with the inner cavity of the side blocking edge 17. The partition plates 12 form a partitioned cavity on both sides. The air suction port of the hot air machine 5 is communicated with the inner cavity of the partition plate 12 through an air suction pipeline 10. The hot air carrying water vapor in the partitioned cavities on both sides of the partition plate 12 is sucked back through the air suction pipeline 10 for reutilization. The inner cavity of the processing box 1 is fixedly connected with a support frame 7. One side of the support frame 7 is fixedly connected with one side of the partition plate 12. The support frame 7 is composed of stainless steel wires arranged in a staggered manner. One side of the support frame 7 is fixedly connected with a water absorption filter screen 6. The hot air containing water vapor sucked through the air suction pipeline 10 is filtered through the water absorption filter screen 6. After the water vapor is absorbed, the hot air is reused, thereby saving energy. Two groups of circulating air paths are formed in the processing box 1, the circulation effect is good, the inner cavity of the processing box 1 is fixedly connected with a fixed frame 8. One side of the fixed frame 8 is fixedly connected with one side of the partition plate 12. The inner cavity of the fixed frame 8 is slidably connected with an extrusion roller 9. The surface of the extrusion roller 9 abuts against the surface of the water absorption filter screen 6. The extrusion roller 9 is driven by an external power mechanism. The extrusion roller 9 is driven to rotate by the power mechanism, thereby driving the extrusion roller 9 to slide along the fixed frame 8. The water absorption filter screen 6 is extruded in cooperation with the fixed frame 8 on one side, thereby extruding the water in the water absorption filter screen 6. The water in the water absorption filter screen 6 falls to the lower side of the processing box 1. A drainage inclined surface 13 is formed in the lower side of the processing box 1. The lowest point of the drainage inclined surface 13 is communicated with a drainage pipe 14. The water filtered after extrusion falls into the drainage inclined surface 13 through the setting of the drainage inclined surface 13, and then the water is discharged through the drainage pipe 14 for cleaning. The inner cavity of the processing box 1 is rotatably provided with a rotating rod 20. The surface of the rotating rod 20 is fixedly connected with a scraping rod 21. One end of the scraping rod 21 abuts against the polyester resin on the surface of the conveying belt 16.The polyester resin is rotated by rotating the rod 20 to drive the scraping rod 21, and the polyester resin is disturbed and laid flat, facilitating the cleaning of the internal water vapor, and the polyester resin is agitated by hot air blowing, effectively volatilizing and recycling the water vapor, and the water removal effect is better. The side of the processing box 1 is communicated with the feeding hopper 2, the inner cavity of the feeding hopper 2 is fixedly connected with the primary filter screen 3, the polyester resin is filtered for the first time through the setting of the primary filter screen 3, and when conveyed by the conveying belt 16, the polyester resin can be laid flat, the heating area of the polyester resin can be increased, the side of the processing box 1 is communicated with the discharge port 4, and the discharge port 4 is inclined downward.

[0043] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any modification, change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A dehydration process for polyester resin materials, characterized in that: Includes the following steps: Step 1: The polyester material is conveyed through the feed hopper (2) of the dewatering equipment for the first filtration. Step 2: The polyester resin fed through the feed hopper (2) is conveyed by the conveyor belt (16) and dried by hot air; Step 3: Recover and reuse the heat, and then squeeze out the water vapor; Step 4: Through the setting of the drainage slope (13), the water filtered out after squeezing falls into the drainage slope (13), and the drain pipe (14) drains the water for cleaning. Step 5: Move the polyester resin. In the first step, when the polyester material falls above the primary filter (3), the polyester resin is filtered for the first time by the primary filter (3), and is conveyed by the movement of the conveyor belt (16). During the conveying, the polyester material that falls above the conveyor belt (16) after being squeezed is carried away by the conveyor belt (16). Then the polyester resin behind falls above the conveyor belt (16) under the squeezing and continues to be conveyed, spreading the polyester resin flat and increasing the heat-receiving area of ​​the polyester resin. In step two, when drying, the hot air blower (5) blows air out and blows air onto the conveyor belt (16) through the blower (18), and blows hot air out through the vent (22) to blow out the water vapor in the polyester resin for drying. During the drying process in step two, a closed structure is formed between the annularly arranged conveyor belts (16) by the side baffles (19), so that the hot air blown out by the blower (18) can only be output through the ventilation holes (22) in the conveyor belt (16); In step three, when recovering and reusing the hot air, the hot air carrying water vapor in the partition cavity on both sides of the partition plate (12) is drawn back through the exhaust port of the hot air blower (5) and the exhaust pipe (10) for reuse. The hot air containing water vapor drawn through the exhaust pipe (10) is filtered by the water absorption filter (6) to absorb the water vapor and then reused. In step three, when squeezing out the water vapor, the extrusion roller (9) is driven to rotate by the power mechanism, which drives the extrusion roller (9) to slide along the fixed frame (8). The fixed frame (8) on one side squeezes the water-absorbing filter (6) to squeeze out the water in the water-absorbing filter (6), and the water in the water-absorbing filter (6) drips down to the bottom of the processing box (1); when the polyester resin is moved in step five, the rotating rod (20) drives the scraper (21) to rotate, which moves the polyester resin to rotate, causing the polyester resin to be disturbed and spread flat, so as to clean the internal water vapor, and blow the polyester resin with hot air to agitate it; two sets of circulating air paths are formed in the processing box (1).

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