Circulating water cooling granulation separation system

Abstract

The utility model relates to the technical field of TPU (Thermoplastic Polyurethanes) pelletizing and separating, in particular to a circulating water cooling pelletizing and separating system. Comprising an extruder and a granulator, a granulating blade area of the granulator is provided with a circulating water pipeline in a penetrating mode from top to bottom, the circulating water pipeline is provided with a water cavity and connected with a centrifugal machine, the centrifugal machine is provided with a circulating water tank, the circulating water tank is connected with a refrigerating machine through a pipeline, and the refrigerating machine is connected with the granulator through a second transmission pump. The discharging end of the centrifugal machine is connected with a vibrating screen through a chute which is arranged obliquely downwards, a protruding section cavity is formed in the chute, a pre-screening pipeline is downwards arranged on the bottom face, corresponding to the protruding section cavity, of the chute, a filter screen is installed on the connecting face of the chute and the pre-screening pipeline, and a buffer cylinder is arranged above the connecting position of the chute and the vibrating screen. And a shunting mechanism is arranged in the buffer cylinder. According to the TPU particle pre-screening device, pre-screening burden reduction, anti-sticking and anti-blocking and buffering material uniformizing in the TPU particle conveying process are achieved, and the screening efficiency and the product uniformity are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to TPU cutting separation technical field, concretely relates to circulating water cooling granulation separation system. BACKGROUND

[0002] In the existing TPU underwater cutting production line, the material is cut into particles in the underwater cutting area of the cutting machine after being melted and extruded by the extruder, and then enters the water cavity for preliminary cooling, and then completes the preparation of finished products through processes such as centrifugal dewatering and vibration screening. The existing process generally has the following technical pain points: first, a large amount of fine powder and too small particles are still entrained in the TPU particles after centrifugal dewatering, which easily causes screen mesh blockage after directly entering the vibration screen, not only reducing the screening efficiency, but also greatly shortening the service life of the screen mesh and increasing the maintenance cost. Secondly, the material impact is large, and the equipment is easy to damage. The material falls at high speed from the discharge port of the centrifugal machine, directly impacting the screen surface of the vibration screen, which easily leads to screen mesh damage and uneven material distribution, affecting the screening accuracy. At the same time, the TPU particles are easy to agglomerate due to static electricity during the conveying process, forming a material mass, which further aggravates the burden of the screen mesh. Finally, the conveying chute is a square flow channel, which is easy to stick and accumulate at the corner, causing poor feeding, even causing blockage, and affecting the continuous and stable operation of the production line.

[0003] Therefore, there is an urgent need for a system that is compact in structure, does not require additional external devices, and can simultaneously complete pre-screening, buffer material, and waste heat recovery during material conveying, to solve the defects in the prior art. UTILITY MODEL CONTENT

[0004] The utility model discloses a circulating water cooling granulation separation system to solve the problems of low TPU particle screening efficiency, easy screen mesh blockage, large material impact, easy material sticking at the corner of the conveying chute, and blockage.

[0005] In order to solve the above problems, the technical scheme of the utility model is as follows:

[0006] The circulating water cooling granulation separation system comprises an extruder and a cutting machine. The cutting blade area of the cutting machine is provided with a circulating water pipeline from top to bottom. A water cavity is arranged on the circulating water pipeline. The circulating water pipeline is connected to a centrifugal machine. The centrifugal machine is provided with a circulating water tank. The circulating water tank is connected to a refrigerating machine through a pipeline. The refrigerating machine is connected to the cutting machine through a second transmission pump. The discharge end of the centrifugal machine is connected to a vibration screen through an inclined downward chute. A convex section cavity is arranged on the chute. A pre-screening pipeline is arranged on the bottom surface of the chute corresponding to the convex section cavity. A filter screen is arranged on the connecting surface of the chute and the pre-screening pipeline. A buffer cylinder is arranged above the connecting part of the chute and the vibration screen. A flow distribution mechanism is arranged in the buffer cylinder.

[0007] Further, the water cavity is provided with a temperature sensor, which is used for monitoring the cooling water temperature in real time, facilitating accurate adjustment of the operation power of the cooling machine, and realizing energy-saving cooling.

[0008] Further, the circulating water tank is connected with the cooling machine through a first transmission pump and a pipeline, so as to realize the circulating cooling of the backwater.

[0009] Further, the cooling water inlet pipeline is connected with the cooling machine, and is used for supplementing the cooling water of the system.

[0010] Further, the bottom area of the buffer cylinder is larger than that of the chute, and the flow passage sectional area is suddenly changed, so that the TPU particle flow rate is suddenly reduced and kinetic energy is dissipated, and meanwhile, the large-diameter cavity provides sufficient radial space for the radial spreading of the TPU particles, and the TPU particles are diffused to the periphery under the action of inertia. Meanwhile, the outlet end of the conveying chute is a square transition section, and the circular arc surface is smoothly connected with the cylindrical buffer cylinder, so that there is no dead angle in the interior.

[0011] Further, the shunt mechanism is a plurality of semicircular arc-shaped support frames, and the semicircular arc protrusions are opposite to the bottom surface of the chute, and the semicircular arc-shaped support frames are fixed on the side wall of the buffer cylinder. The shunt guiding effect of the semicircular arc-shaped support frames can scatter the material lumps and uniformly distribute the materials, so that the TPU particles originally concentrated in the center of the screen can be uniformly spread, and the whole screen surface of the vibrating screen can be fully utilized.

[0012] Further, the oscillator is arranged on the top of the protruding section cavity. The protruding section cavity is an enlarged cavity, so that the TPU particle flow rate is instantaneously reduced, sufficient residence and screening space is provided for the fine powder and small particles, and the incomplete screening caused by the too fast flow rate is avoided. The small particles pass through the filter screen and are discharged from the pre-screening pipeline below and collected, the high-frequency vibration of the oscillator prevents the fine powder from adhering to the wall, ensures the continuous and stable pre-screening process, and also avoids the particles from adhering to the corner of the chute as much as possible, so that the particles in the whole chute can smoothly slide to the vibrating screen.

[0013] The fine powder and small particles collected by the pre-screening pipeline can be recycled, and after drying and removing water, the TPU particles can be re-put into the extruder for melting and granulation, so that the raw material loss is significantly reduced, and the economy of the production line is improved.

[0014] The sealing plate is arranged on the top of the chute, and the sealing plate can be opened to disassemble and replace the filter screen and clean the whole chute pipeline.

[0015] The beneficial effects of the utility model are as follows:

[0016] (1) The utility model discloses a protruding section cavity is set in the chute and cooperates with the built-in filter screen, and the fine powder and the too small particle are screened in advance in the conveying process, the amount of fine powder entering the main vibrating screen is greatly reduced, the vibrating screen screen clogging is effectively prevented, the service life of screen is prolonged, and the maintenance frequency and cost are reduced.

[0017] (2) The utility model discloses the big diameter design of buffer cylinder, utilizes the principle of cross -section area mutation, makes material flow rate sudden drop, avoids the splash and screen local overload caused by high -speed impact, and cooperation half -round arc support frame's shunt guide effect, converts single -point unloading into planar cloth, makes the screening area utilization of vibrating screen improve, guarantees the uniformity of product particle size.

[0018] (3) The utility model discloses the buffer cylinder passes through the right angle dead angle of chute and is transitioned by arc, fundamentally puts an end to the wall accumulation of TPU particle at the corner, and the high -frequency vibration of top oscillator further destroys the wall effect of material, ensures that the flow passage is smooth, avoids the shutdown caused by the blockage.

[0019] (4) The fine powder and small particle collected by the pre-screening pipeline can be recycled, and after drying and removing water, can be re-injected into the extruder for melting and granulation, which significantly reduces the raw material loss and improves the economy of the production line.

[0020] (5) The temperature sensor on the water cavity monitors the water temperature in real time, accurately adjusts the operating power of the cooling machine, avoids unnecessary cooling energy consumption, and realizes energy-saving production. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model. In the drawings:

[0022] Fig. 1 It is the structure diagram of the utility model circulation water cooling granulation separation system;

[0023] Fig. 2 It is the structure diagram of the utility model buffer cylinder;

[0024] In the drawing: 1, extruder;2, pelletizer;3, circulating water pipeline;4, water cavity;401, temperature sensor;5, centrifuge;6, circulating water tank;7, chute;701, protruding section cavity;702, oscillator;8, pre-screening pipeline;801, filter screen;9, buffer cylinder;901, shunt mechanism;10, vibrating screen;11, first transmission pump;12, refrigerator;13, second transmission pump;14, cooling water inlet pipeline. DETAILED DESCRIPTION

[0025] The utility model can be understood by the following combining with examples.

[0026] Example 1

[0027] As shown in Figs. 1-2 The circulating water cooling and granulating separation system comprises an extruder 1, a pelletizer 2, a circulating water pipeline 3 provided through the pelletizing blade area of the pelletizer 2 from top to bottom, a water cavity 4 provided on the circulating water pipeline 3, a centrifuge 5 connected with the circulating water pipeline 3, a circulating water tank 6 provided on the centrifuge 5, a refrigerating machine 12 connected with the circulating water tank 6 through a pipeline, the pelletizer 2 connected with the refrigerating machine 12 through a second transmission pump 13, a chute 7 provided on the discharge end of the centrifuge 5 and connected with a vibrating screen 10, a convex section cavity 701 provided on the chute 7, a pre-screening pipeline 8 provided on the bottom surface of the chute 7 corresponding to the convex section cavity 701, a filter screen 801 mounted on the connecting surface of the chute 7 and the pre-screening pipeline 8, a buffer cylinder 9 provided above the connecting position of the chute 7 and the vibrating screen 10, and a flow splitting mechanism 901 provided in the buffer cylinder 9.

[0028] Further, a temperature sensor 401 is provided on the water cavity 4, which is used for monitoring the temperature of the cooling water in real time, so as to accurately adjust the operation power of the refrigerating machine 12 and realize energy-saving cooling.

[0029] Further, the circulating water tank 6 is connected with the refrigerating machine 12 through a first transmission pump 11 and a pipeline, so as to realize the circulating cooling of the backwater.

[0030] Further, the refrigerating machine 12 is connected with a cooling water inlet pipeline 14, which is used for supplementing the cooling water of the system.

[0031] Further, the bottom area of the buffer cylinder 9 is greater than the bottom area of the chute 7. The principle of sudden change of flow passage cross-sectional area is used to make the flow speed of the TPU particles suddenly decrease and realize the kinetic energy dissipation. At the same time, a sufficient radial space is provided for the radial spreading of the TPU particles by the large-diameter cavity, and the TPU particles are diffused to the surrounding under the action of inertia. At the same time, the discharge end of the conveying chute 7 is a square transition section, which is smoothly connected with the cylindrical buffer cylinder 9 through a circular arc surface, so that there is no dead angle in the inside.

[0032] Further, the flow splitting mechanism 901 is two semicircular arc-shaped support frames, and the semicircular arc protrusions are directly opposite to the bottom surface of the chute 7. The semicircular arc-shaped support frames are fixed on the side wall of the buffer cylinder 9. The flow splitting and guiding effect of the semicircular arc-shaped support frames can scatter the material lumps and uniformly distribute the materials, so that the TPU particles originally concentrated in the center of the screen can be uniformly spread, and the entire screen surface of the vibrating screen 10 can be fully utilized.

[0033] Further, the outer top of the convex section cavity 701 is provided with an oscillator 702. The convex section cavity 701 is an expanded cavity, which makes the TPU particle flow rate instantaneously decrease, provides sufficient residence and screening space for fine powder and small particles, and avoids incomplete screening due to too fast flow rate. Small particles pass through the filter screen 801 and are discharged from the pre-screening pipeline 8 below and collected, and the high-frequency vibration of the oscillator 702 prevents fine powder from sticking to the wall, ensures the continuous and stable pre-screening process, and also avoids particles sticking to the corners of the chute 7 as much as possible, so as to ensure that the particles in the entire chute 7 can smoothly slide to the vibrating screen 10.

[0034] The fine powder and small particles collected by the pre-screening pipeline 8 can be recycled, and after drying and removing water, they can be re-put into the extruder 1 for melting and granulation, which significantly reduces the loss of raw materials and improves the economy of the production line.

[0035] A sealing plate is provided at the top of the chute 7, which can be opened to disassemble and replace the filter screen 801 and clean the entire chute 7 pipeline.

[0036] Working principle:

[0037] The TPU molten material is extruded by the extruder 1 and cut into particles in the underwater cutting area of the pelletizer 2, and then falls directly into the cooling water in the water cavity 4. The low-temperature cooling water delivered by the circulating water pipeline 3 continuously flows in and fully mixes with the particles to achieve rapid cooling. The temperature sensor 401 on the water cavity 4 monitors the water temperature in real time to provide data for subsequent cooling control. The cooling water mixed with TPU particles flows out of the water cavity 4 and enters the centrifuge 5 for dehydration. After dehydration, the particles enter the chute 7 arranged at an inclination, and the cooling water flows into the circulating water tank 6. The TPU particles slide down along the chute 7 and enter the convex section cavity 701. The expanded volume of the convex section cavity 701 makes the material flow rate instantaneously decrease, providing sufficient residence and screening space for fine powder and small particles. Fine powder with a particle size smaller than the pore size of the filter screen 801 passes through the screen holes, is discharged from the pre-screening pipeline 8 below and collected, and can be recycled. At the same time, the oscillator 702 at the outer top of the convex section cavity 701 produces high-frequency vibration to prevent fine powder from sticking to the wall and to avoid particles accumulating at the corners of the chute, ensuring smooth sliding of the material. Qualified TPU particles enter the cylindrical buffer cylinder 9 with a larger bottom area from the square discharge end of the chute 7. The material flow rate suddenly decreases due to the sudden change in cross-sectional area, achieving kinetic energy dissipation and avoiding high-speed impact. Subsequently, the particles hit the semicircular arc-shaped support frame in the buffer cylinder 9, the material mass is broken up, and under the guiding action, it is evenly spread to all directions. Finally, it is evenly and stably spread on the entire screen surface of the vibrating screen 10 for final screening. The backwater in the circulating water tank 6 is sent to the refrigerating machine 12 by the first transfer pump 11, and the refrigerating machine 12 adjusts the cooling power according to the feedback of the temperature sensor 401. The low-temperature water after cooling is sent back to the pelletizer 2 by the second transfer pump 13, completing the entire water circulation.

Claims

1. A circulating water cooling pelletizing and separating system, comprising an extruder (1) and a pelletizer (2), wherein a circulating water pipeline (3) is provided through the pelletizing blade area of ​​the pelletizer (2) from top to bottom, a water chamber (4) is provided on the circulating water pipeline (3), the circulating water pipeline (3) is connected to a centrifuge (5), the centrifuge (5) is provided with a circulating water tank (6), the circulating water tank (6) is connected to a chiller (12) through a pipe, and the chiller (12) is connected to the pelletizer (2) through a second transfer pump (13), characterized in that, The centrifuge (5) discharge end is connected to the vibrating screen (10) through a downwardly inclined chute (7). The chute (7) is provided with a raised section cavity (701). A pre-screening pipe (8) is opened on the bottom surface of the chute (7) corresponding to the raised section cavity (701). A filter screen (801) is installed on the connection surface between the chute (7) and the pre-screening pipe (8). A buffer cylinder (9) is provided above the connection between the chute (7) and the vibrating screen (10). A diversion mechanism (901) is provided inside the buffer cylinder (9).

2. The circulating water cooling and granulation separation system according to claim 1, characterized in that, A temperature sensor (401) is provided on the water cavity (4).

3. The circulating water cooling and granulation separation system according to claim 1, characterized in that, The circulating water tank (6) is connected to the chiller (12) via the first transfer pump (11) and pipes.

4. The circulating water cooling and granulation separation system according to claim 1, characterized in that, The refrigeration unit (12) is connected to a cooling water inlet pipe (14).

5. The circulating water cooling and granulation separation system according to claim 1, characterized in that, The bottom area of ​​the buffer cylinder (9) is greater than the bottom area of ​​the chute (7).

6. The circulating water cooling and granulation separation system according to claim 5, characterized in that, The diversion mechanism (901) consists of several semi-circular arc-shaped support frames, with the semi-circular arc protrusions facing the bottom surface of the chute (7), and the semi-circular arc-shaped support frames are fixed to the side wall of the buffer cylinder (9).

7. The circulating water cooling and granulation separation system according to claim 1, characterized in that, An oscillator (702) is provided on the top of the outer side of the protruding cavity (701).

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