A production device of high-uniformity SSP high-viscosity polyester chip

Abstract

The application belongs to the technical field of chemical fiber production devices, and particularly relates to a high-uniformity SSP high-viscosity polyester chip production device. In view of the existing technical problems, the following scheme is proposed. The device comprises a pre-crystallizer, the outer wall of the pre-crystallizer is provided with a turnover structure, the shell of the pre-crystallizer is internally provided with a driving structure, the inside of the pre-crystallizer is movably sleeved with a first rotating shaft coaxially arranged therewith, the top of the first rotating shaft is fixedly provided with a first rotating motor fixed to the top of the pre-crystallizer, the outer ring of the first rotating shaft is fixedly connected with an annular first fixed plate, the first fixed plate is a hollow structure, and the top of the first fixed plate is uniformly fixed with a pre-crystallization bin. The device can ensure that hot nitrogen gas and the chips in the pre-crystallizer are in full contact, can ensure that the chips can be fully preheated to crystallize, can avoid that the chips cannot be uniformly heated, can shorten the crystallization time of the chips, and can avoid that the chips are stuck together during the preheating and crystallization process.

Description

Technical Field

[0001] This invention relates to the field of chemical fiber production equipment technology, and in particular to a production equipment for high-uniformity SSP high-viscosity polyester chips. Background Technology

[0002] Solid-state polycondensation refers to the process of heating monomers or low-molecular-weight prepolymers to above their glass transition temperature but below their melting point to carry out a polymerization reaction. Before the polycondensation reaction, the prepolymer needs to be crystallized and granulated to achieve a certain degree of crystallinity and prevent particle agglomeration. According to Zimmerman's two-zone model, there are crystalline and amorphous regions in the reaction particles of solid-state polycondensation. The repeating units of macromolecules and inactive reactive groups are frozen in the crystalline regions, while chain-end groups, small molecules, and catalyst components are repelled into the amorphous regions. This greatly increases the effective concentration of reactive groups and strengthens the collision frequency between groups, thereby accelerating the polymerization rate. The generated small-molecule byproducts flow out of the reaction system through a vacuum or inert gas, promoting the reaction to continuously move towards the product direction and continuously increasing the molecular weight of the product.

[0003] Currently, domestic industrial yarn manufacturers employ varying SSP (Self-Splitting Process) technologies. Furthermore, different manufacturers use different process flows: SSP is implemented using either intermittent or continuous production methods. Traditional intermittent SSP production methods are energy-intensive, have low output, and exhibit poor batch-to-batch quality uniformity. Currently, most companies have phased out this method, except for a very few with specific application requirements. Continuous SSP production methods, on the other hand, are now widely adopted by most companies due to their high production efficiency, low investment costs, and automation capabilities.

[0004] Application CN201010262153.5 discloses a high-uniformity SSP high-viscosity polyester chip production process, belonging to the field of chemical fiber production technology. It includes the following steps: (1) Pre-crystallizer: Chips with a viscosity of approximately 0.67 dl / g, input from polymerization, are fed into two parallel pre-crystallizers from above, while hot air at 177°C is introduced from below to begin crystallization. After 12-15 minutes of crystallization, the chips are output from the crystallizer; (2) Pre-reaction: Chips output from the pre-crystallizer are fed into a pre-reactor. A ridge-type reactor is added to the upper part of the pre-reactor, and the viscosity of the chips output from the pre-reactor can reach 0.82 dl / g; (3) Final polycondensation reaction: The highest viscosity of the chips output from the final polycondensation reactor can reach 1.09 dl / g. This invention optimizes the existing SSP process flow. This patent effectively ensures the successful preparation of highly uniform, high-viscosity polyester chips by controlling the pre-crystallization process, the pre-reaction process, and the final polycondensation process. However, in the pre-crystallization step, the chips are heated by convection between hot air and the chips. This method does not ensure uniform heating of the chips, resulting in inconsistent crystallization states. Furthermore, the chips tend to stick together during the crystallization process, failing to achieve the desired results. Summary of the Invention

[0005] The present invention provides a production apparatus for high-uniformity SSP high-viscosity polyester chips, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A production apparatus for high-uniformity SSP high-viscosity polyester chips includes a pre-crystallizer. The outer wall of the pre-crystallizer is provided with a flipping structure, and the shell of the pre-crystallizer is provided with a driving structure. A first rotating shaft is movably sleeved inside the pre-crystallizer and is coaxially arranged therewith. A first rotating motor fixed to the top of the first rotating shaft and fixed to the top of the pre-crystallizer is fixed. A first fixing plate with an annular structure is fixed to the outer ring of the first rotating shaft, and the first fixing plate is a hollow structure. Pre-crystallization chambers are uniformly fixed to the top of the first fixing plate. A first air pipe connected to the inside of the first fixing plate is fixed to the top of the pre-crystallization chamber. A second air pipe is fixed between two sets of adjacent pre-crystallization chambers located in the same radial direction. A flat structure is provided above the first fixing plate and located above the pre-crystallization chamber. Two sets of connecting rods symmetrically distributed along their central axis are fixed to the top of the flat structure.

[0008] Preferably, the driving structure includes a cavity disposed inside the pre-crystallizer housing, a screw is movably sleeved on the top of the cavity, a second rotating motor fixed to the bottom of the screw and the bottom inner wall of the cavity is fixedly fixed, a first fixing collar is threaded onto the outer ring of the screw, and a slider is fixedly connected to the outer ring of the first fixing collar.

[0009] Preferably, the inner wall of the pre-crystallizer has a through hole, and the slider is located in the through hole.

[0010] Preferably, the flipping structure includes a second fixing collar fixedly connected to the outer wall of the pre-crystallizer, the outer ring of the second fixing collar is fixedly connected to the same set of second rotating shafts, the other end of the second rotating shaft is fixedly connected to a flipping motor, and the other ends of the two sets of flipping motors are fixedly connected to the same set of ring-shaped support frames.

[0011] Preferably, the first trachea is inclined, and the distance between the two sets of first trachea symmetrically distributed along the central axis of the first rotating shaft gradually decreases from top to bottom, while the distance between the two sets of second trachea symmetrically distributed along the central axis of the first rotating shaft gradually increases from top to bottom.

[0012] Preferably, the bottom of the first rotating shaft is provided with an air supply chamber, the first fixing plate is connected to the air supply chamber, and a connecting pipe is movably sleeved on the bottom of the first rotating shaft, the connecting pipe being fixedly connected to the bottom of the pre-crystallized part.

[0013] The beneficial effects of this invention are:

[0014] 1. In this invention, when crystallizing low-viscosity polyester chips, hot nitrogen is first sent to the first fixed plate through the main gas pipe. Then, the first fixed plate sends hot nitrogen to the pre-crystallization chamber through the first gas pipe, controlling the internal temperature of the pre-crystallizer at 175-177 degrees Celsius. The hot nitrogen is blown onto the polyester chips at a certain angle and then sent to the next pre-crystallization chamber through the second gas pipe until it is finally sent out of the pre-crystallization chamber. This process avoids the polyester chips from sticking together and ensures that the polyester chips are fully preheated, achieving the desired crystallization effect. This ensures that the chips are fully crystallized, avoids uneven heating, shortens the crystallization time, saves energy and is environmentally friendly, and prevents the chips from sticking together during the process.

[0015] 2. This invention can keep the pre-crystallizer warm through the heat insulation layer, preventing the heat inside the pre-crystallizer from diffusing into the atmosphere, thereby keeping the internal temperature of the pre-crystallizer constant within the required temperature range, reducing energy waste, lowering economic costs, and being energy-saving and environmentally friendly. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a production apparatus for high-uniformity SSP high-viscosity polyester chips proposed in this invention.

[0017] Figure 2 This is a schematic diagram of the pre-crystallization chamber and the first gas pipe proposed in this invention.

[0018] Figure 3 This is a schematic diagram of the pre-crystallization chamber and the first rotating shaft proposed in this invention.

[0019] Figure 4 This is a schematic diagram of the structure of the flip motor and the second rotating shaft proposed in this invention.

[0020] Figure 5 This is a schematic diagram of the structure of the first and second fixing collars proposed in this invention.

[0021] Figure 6 This is a cross-sectional view of the pre-crystallized material proposed in this invention.

[0022] Figure 7 The present invention relates to a pre-crystallizer and a connecting block.

[0023] Figure 8 This is a schematic diagram of the pre-crystallizer and the first rotating shaft proposed in this invention.

[0024] Labels in the diagram: 1. Pre-crystallizer; 2. First rotating shaft; 3. First rotating motor; 4. First fixed plate; 5. Pre-crystallization chamber; 6. First gas pipe; 7. Second gas pipe; 8. Flat structure; 801. Push plate; 802. Second fixed plate; 9. Connecting rod; 10. Drive structure; 101. Cavity; 102. Screw; 103. First fixing collar; 104. Slider; 105. Second rotating motor; 11. Tilting structure; 111. Second fixing collar; 112. Second rotating shaft; 113. Tilting motor; 12. Support frame; 13. Slice. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figure 1-5A production apparatus for high-uniformity SSP high-viscosity polyester chips includes a pre-crystallizer 1. The outer wall of the pre-crystallizer 1 is provided with a flipping structure 11. A driving structure 10 is provided inside the shell of the pre-crystallizer 1. A first rotating shaft 2, coaxially arranged with the pre-crystallizer 1, is movably sleeved inside the pre-crystallizer 1. A first rotating motor 3, fixed to the top of the first rotating shaft 2 and also fixed to the top of the pre-crystallizer 1, is fixed to the outer ring of the first rotating shaft 2. The first fixing plate 4 has a hollow structure, and pre-crystallization chambers 5 are uniformly fixed to the top of the first fixing plate 4. A first air pipe 6, connected to the inside of the first fixed plate 4, is fixedly connected to the top of the chamber 5. A second air pipe 7 is fixedly connected between two adjacent pre-crystallization chambers 5 located in the same radial direction. A flat structure 8 is provided above the first fixed plate 4, located above the pre-crystallization chamber 5. Two sets of connecting rods 9, symmetrically distributed along their central axis, are fixed to the top of the flat structure 8. The material is fed to the bottom of the push plate 801 through the feed inlet, and then the first rotating motor 3 is started. The first rotating motor 3 drives the first rotating shaft 2 connected to it to rotate, and the first rotating shaft 2 drives the first fixed plate 4 connected to it. The fixed plate 4 drives the pre-crystallization chamber 5 connected to it to rotate together. During rotation, the second fixed plate 802 pushes the slices into the pre-crystallization chamber 5. After ensuring that all slices are inside the pre-crystallization chamber 5, the first rotating motor 3 stops working, and then the second rotating motor 105 is started. The second rotating motor 105 drives the screw 102 connected to it to rotate. The screw 102 drives the first fixed collar 103 connected to it to slide downward. The first fixed collar 103 drives the slider 104 connected to it to slide downward along the through hole. The slider 104 drives the pusher connected to it to slide downward. Plate 801 moves downwards, and push plate 801 contacts the top of pre-crystallization chamber 5. Then the second rotating motor 105 stops rotating. At this time, hot nitrogen gas is sent to the first fixed plate 4 through the first rotating shaft 2. The first fixed plate 4 sends hot nitrogen gas to the pre-crystallization chamber 5 through the first air pipe 6. The hot nitrogen gas is blown towards the slice 13 at a certain angle, and then sent to the next pre-crystallization chamber 5 through the second air pipe 7, until it is finally sent out of the pre-crystallization chamber 5. This can prevent the slices 13 from sticking to each other, and at the same time, it can fully preheat the slices 13 so that the expected crystallization effect can be achieved.After crystallization, the second rotating motor 105 is rotated, driving the screw 102 connected to it to rotate. The screw 102 drives the first fixed collar 103 connected to it to slide upward. The first fixed collar 103 drives the slider 104 connected to it to slide upward along the through hole. The slider 104 drives the push plate 801 connected to it to move upward, causing the push plate 801 to separate from the pre-crystallization chamber 5. Then, the flipping motor 113 is started, driving the second rotating shaft 112 connected to it to rotate. The second rotating shaft 112 drives the second fixed collar 111 connected to it to rotate. The second fixed collar 111 drives the pre-crystallizer 1 connected to it to rotate. When it rotates to 180 degrees, the slice 13 separates from the pre-crystallization chamber 5, thus sending the processed slice 13 out of the pre-crystallizer 1. Throughout the process, hot nitrogen gas is in full contact with the slice inside the pre-crystallizer 1, ensuring that the slice is fully crystallized, avoiding uneven heating of the slice, shortening the slice crystallization time, and saving energy and protecting the environment.

[0027] In this embodiment: the drive structure 10 includes a cavity 101 disposed inside the housing of the pre-crystallizer 1. A screw 102 is movably sleeved on the top of the cavity 101. A second rotating motor 105, which is fixed to the bottom inner wall of the cavity 101, is fixed to the bottom of the screw 102. A first fixing collar 103 is threadedly sleeved on the outer ring of the screw 102. A slider 104 is fixedly connected to the outer ring of the first fixing collar 103. The second rotating motor 105 drives the screw 102 connected to it to rotate. The screw 102 drives the first fixing collar 103 connected to it to slide downward. The first fixing collar 103 drives the slider 104 connected to it to slide downward along the through hole. The slider 104 drives the push plate 801 connected to it to move downward. The push plate 801 contacts the top of the pre-crystallization chamber 5. Then the second rotating motor 105 stops rotating. After crystallization is completed, the second rotating motor 105 returns the push plate 801 to its original position.

[0028] In this embodiment: the inner wall of the pre-crystallizer 1 is provided with a through hole, and the slider 104 is located in the through hole; the through hole can limit the slider 104, so that the slider 104 can only move up and down along the through hole.

[0029] In this embodiment: the flipping structure 11 includes a second fixing collar 111 fixed to the outer wall of the pre-crystallizer 1. The outer ring of the second fixing collar 111 is fixed to the same set of second rotating shafts 112. The other end of the second rotating shaft 112 is fixed to a flipping motor 113. The other ends of the two sets of flipping motors 113 are fixed to the same set of ring-shaped support frames 12. The flipping motor 113 drives the second rotating shaft 112 connected to it to rotate. The second rotating shaft 112 drives the second fixing collar 111 connected to it to rotate. The second fixing collar 111 drives the pre-crystallizer 1 connected to it to rotate. When it rotates to 180 degrees, the slice 13 separates from the pre-crystallizer 5, thereby sending the processed slice 13 out of the pre-crystallizer 1.

[0030] In this embodiment: the flat structure 8 includes a second fixed plate 802 that is movably sleeved with the first rotating shaft 2, and the second fixed plate 802 is a hollow structure. Two sets of push plates 801 symmetrically distributed along its central axis are slidably sleeved on the bottom of the second fixed plate 802, and the top of the push plate 801 is fixed to the bottom of the connecting rod 9, and the other end of the connecting rod 9 is fixed to the top inner wall of the pre-crystallizer 1. The feed inlet is sent to the bottom of the push plate 801, and then the first rotating motor 3 is started. The first rotating motor 3 drives the first rotating shaft 2 connected to it to rotate. The first rotating shaft 2 drives the first fixed plate 4 connected to it to rotate. The first fixed plate 4 drives the pre-crystallization chamber 5 connected to it to rotate together. When rotating, the second fixed plate 802 pushes the slice into the pre-crystallization chamber 5. The connecting rod 9 limits the second fixed plate 802, so that when the first fixed plate 4 rotates, the slice 13 can be sent into the pre-crystallization chamber 5.

[0031] In this embodiment: the first air pipe 6 is inclined, and the distance between the two sets of first air pipes 6 symmetrically distributed along the central axis of the first rotating shaft 2 gradually decreases from top to bottom, while the distance between the two sets of second air pipes 7 symmetrically distributed along the central axis of the first rotating shaft 2 gradually increases from top to bottom; so that the airflow blows in the same direction, thereby blowing the slice 13 to rotate and fully preheating the slice 13.

[0032] In this embodiment: a gas delivery chamber is provided at the bottom of the first rotating shaft 2, and the first fixed plate 4 is connected to the gas delivery chamber. A connecting pipe is movably sleeved at the bottom of the first rotating shaft 2, and the connecting pipe is fixedly connected to the bottom of the pre-crystallizer 1. Gas is sent into the gas delivery chamber through the connecting pipe, and then the gas is sent to the first fixed plate 4 through the gas delivery chamber.

[0033] In this embodiment: the pre-crystallization chamber 5 located on the side away from the first rotating shaft 2 is fixedly connected to a second air pipe 7, and the outer wall of the pre-crystallization chamber 5 is provided with a heat insulation layer; reducing heat loss and saving energy and protecting the environment.

[0034] Working principle: When crystallizing low-viscosity chips, the chips to be processed are first fed through the feed inlet to the area below the pusher plate 801. Then, the first rotating motor 3 is started, which drives the first rotating shaft 2 connected to it to rotate. The first rotating shaft 2 drives the first fixed plate 4 connected to it to rotate, and the first fixed plate 4 drives the pre-crystallization chamber 5 connected to it to rotate together. During rotation, the second fixed plate 802 pushes the chips into the pre-crystallization chamber 5. After ensuring that all chips are inside the pre-crystallization chamber 5, the first rotating motor 3 stops working, and then the second rotating motor 105 is started. The screw 102 connected to it rotates, causing the first fixing collar 103 connected to it to slide downwards. The first fixing collar 103 causes the slider 104 connected to it to slide downwards along the through hole. The slider 104 causes the push plate 801 connected to it to move downwards. The push plate 801 contacts the top of the pre-crystallization chamber 5, and then the second rotating motor 105 stops rotating. At this time, hot nitrogen gas is sent to the first fixing plate 4 through the first rotating shaft 2. The first fixing plate 4 sends hot nitrogen gas to the pre-crystallization chamber 5 through the first gas pipe 6. The hot nitrogen gas is blown towards the slice 13 at a certain angle, and then through the second... The air tube 7 delivers the material to the next pre-crystallization chamber 5 until it is finally discharged from the pre-crystallization chamber 5. This prevents the slices 13 from sticking together and allows for sufficient preheating of the slices 13, achieving the desired crystallization effect. After crystallization, the second rotating motor 105 is rotated, which drives the screw 102 connected to it to rotate. The screw 102 drives the first fixing collar 103 connected to it to slide upward. The first fixing collar 103 drives the slider 104 connected to it to slide upward along the through hole. The slider 104 drives the push plate 801 connected to it to move upward, so that the push plate 801 and the push plate 801 move upward together. The pre-crystallization chamber 5 is separated, and then the flip motor 113 is started. The flip motor 113 drives the second rotating shaft 112 connected to it to rotate. The second rotating shaft 112 drives the second fixed collar 111 connected to it to rotate. The second fixed collar 111 drives the pre-crystallizer 1 connected to it to rotate. When it rotates to 180 degrees, the slice 13 separates from the pre-crystallization chamber 5, thereby sending the processed slice 13 out of the pre-crystallizer 1. Throughout the process, hot nitrogen gas is in full contact with the slice inside the pre-crystallizer 1, thereby ensuring that the slice is fully crystallized, avoiding uneven heating of the slice, shortening the crystallization time of the slice, and saving energy and protecting the environment.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A production apparatus for high-uniformity SSP high-viscosity polyester chips, comprising a pre-crystallizer (1), characterized in that, The pre-crystallizer (1) has a flipping structure (11) on its outer wall. The pre-crystallizer (1) has a drive structure (10) inside its shell. The pre-crystallizer (1) is movably sleeved with a first rotating shaft (2) coaxially arranged with it. The top of the first rotating shaft (2) is fixed with a first rotating motor (3) fixed with the top of the pre-crystallizer (1). The outer ring of the first rotating shaft (2) is fixed with a ring structure first fixing plate (4), and the first fixing plate (4) is a hollow structure. The top of the first fixing plate (4) is uniformly fixed with pre-crystallization chambers (5). The top of the pre-crystallization chambers (5) is fixed with a first air pipe (6) connected to the inside of the first fixing plate (4). A second air pipe (7) is fixed between two adjacent pre-crystallization chambers (5) located in the same radial direction. A flat structure (8) is arranged above the first fixing plate (4) above the pre-crystallization chambers (5). The top of the flat structure (8) is fixed with two sets of connecting rods (9) symmetrically distributed along its central axis. The drive structure (10) includes a cavity (101) disposed inside the shell of the pre-crystallizer (1). A screw (102) is movably sleeved on the top of the cavity (101). A second rotating motor (105) is fixed to the bottom of the screw (102) and fixed to the inner wall of the bottom of the cavity (101). A first fixing collar (103) is threaded onto the outer ring of the screw (102). A slider (104) is fixed to the outer ring of the first fixing collar (103).

2. A device for producing a high-uniformity SSP high-cohesion polyester chip according to claim 1, characterized by, The inner wall of the pre-crystallizer (1) is provided with a through hole, and the slider (104) is located in the through hole.

3. The apparatus for producing a high-uniformity SSP high-cohesion polyester chip according to claim 1, characterized by, The flipping structure (11) includes a second fixing collar (111) fixed to the outer wall of the pre-crystallizer (1). The outer ring of the second fixing collar (111) is fixed to the same set of second rotating shafts (112). The other end of the second rotating shaft (112) is fixed to a flipping motor (113). The other ends of the two sets of flipping motors (113) are fixed to the same set of ring structure support frames (12).

4. The apparatus for producing a high-uniformity SSP high-cohesion polyester chip according to claim 1, characterized by, The flat structure (8) includes a second fixed plate (802) that is movably sleeved with the first rotating shaft (2), and the second fixed plate (802) is a hollow structure. Two sets of push plates (801) are slidably sleeved on the bottom of the second fixed plate (802) and are symmetrically distributed along its central axis. A connecting rod (9) is fixedly sleeved on the top of the push plate (801) and is fixedly sleeved on the top of the second fixed plate (802). The other end of the connecting rod (9) is fixed to the top inner wall of the pre-crystallizer (1).

5. The apparatus for producing a high-uniformity SSP high-cohesion polyester chip according to claim 1, characterized by, The first trachea (6) is inclined, and the distance between the two sets of first trachea (6) symmetrically distributed along the central axis of the first rotating shaft (2) gradually decreases from top to bottom, while the distance between the two sets of second trachea (7) symmetrically distributed along the central axis of the first rotating shaft (2) gradually increases from top to bottom.

6. The apparatus of claim 1, wherein the apparatus is characterized by: The bottom of the first rotating shaft (2) is provided with an air supply chamber, the first fixed plate (4) is connected to the air supply chamber, and the bottom of the first rotating shaft (2) is movably sleeved with a connecting pipe, which is fixedly connected to the bottom of the pre-crystallized part.

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