Efficient underwater pelletizing circulating system

Abstract

The utility model discloses an efficient underwater pelletizing circulating system, and particularly relates to the field of plastic pelletizing, the efficient underwater pelletizing circulating system comprises a hot water circulating system and a cold water circulating system, the hot water circulating system comprises a hot water pool, the hot water pool is communicated with a first water pump, the first water pump is communicated with an underwater pelletizing machine through a hot water conveying pipe, and the hot water conveying pipe is communicated with a second water pump. The underwater granulator is connected with the extruder head, a water outlet pipe of the underwater granulator is communicated with a conveying pipe, and the conveying pipe is communicated with the hot water tank through a hot water return pipe; the cold water circulation system comprises a cold water pool, the cold water pool is communicated with a dehydration centrifugal machine through a cold water conveying pipe and a coil pipe, and the dehydration centrifugal machine is communicated with the cold water pool; an inclined metal sieve plate is arranged between the conveying pipe and the hot water return pipe, the water inlet side of the metal sieve plate is communicated with the cold water conveying pipe at the same time, and the efficient underwater pelletizing circulating system has the advantages that the structure is simple, the particle quality is good, two sets of water circulating systems are adopted, and the pelletizing water temperature is stable.

Description

Technical Field

[0001] The utility model belongs to the field of plastic pelletizing, and in particular relates to a high-efficiency underwater pelletizing circulation system. Background Art

[0002] At present, in the plastic processing industry, underwater pelletizers are usually used for masterbatch cutting. Underwater pelletizing generally uses circulating water. The circulating water of the underwater pelletizer will come into contact with the high-temperature molten material during the pelletizing process, and the water temperature will be rapidly heated. Overheating of the water greatly reduces the cooling efficiency of the material, and it is easy for the plastic particles to be uneven in size and shape. For materials with low melting points, their processability will also be affected.

[0003] Therefore, a new type of high-efficiency underwater pelletizing circulation system is needed. Utility Model Content

[0004] In order to solve the above problems, the utility model discloses a high-efficiency underwater pelletizing circulation system.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0006] A high-efficiency underwater pelletizing circulation system comprises a hot water circulation system and a cold water circulation system, wherein the hot water circulation system comprises a hot water pool, the hot water pool is connected to a first water pump, the first water pump is connected to an underwater pelletizer via a hot water supply pipe, and the underwater pelletizer is connected to an extruder head, the outlet pipe of the underwater pelletizer is connected to a delivery pipe, and the delivery pipe is connected to the hot water pool via a return water pipe; the cold water circulation system comprises a cold water pool, the cold water pool is connected to a dehydration centrifuge via a cold water supply pipe and a coil, and the dehydration centrifuge is connected to the cold water pool; an inclined metal sieve plate is arranged between the delivery pipe and the return water pipe, and the water inlet side of the metal sieve plate is simultaneously connected to the cold water supply pipe.

[0007] As a preferred technical solution of the present invention, the inclination direction of the metal sieve plate follows the direction of water flow from the delivery pipe to the cold water pipe.

[0008] As a preferred technical solution of the present invention, the metal sieve plate is arranged between the delivery pipe and the hot water return pipe at an angle of 30-60 degrees to the horizontal plane.

[0009] As a preferred technical solution of the present invention, the water flow directions of the parallel sections of the delivery pipe and the cold water delivery pipe are the same.

[0010] As a preferred technical solution of the present utility model, the hot water pipe is connected to the water inlet pipe of the underwater pelletizer.

[0011] As a preferred technical solution of the present invention, the coil is arranged longitudinally along its axis.

[0012] The beneficial effects of the utility model are:

[0013] 1. After the underwater pelletizer completes pelletizing, the plastic particles and hot water can be separated at the metal screen plate. The hot water flows back to the hot water tank along the conveying pipe and the return water pipe. The plastic particles enter the coil through the space above the metal screen plate. The particles can be quickly cooled by cold water in the coil, thereby achieving efficient cooling. It can also effectively improve the processability of materials with low melting points and enhance the uniformity of the plastic particles.

[0014] Second, the utility model has the characteristics of simple structure, good particle quality, two sets of water circulation systems, and stable temperature of pelletizing water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0016] Figure 2 This is a partially enlarged view of the underwater pelletizer according to an embodiment of the present utility model.

[0017] List of Figure Symbols:

[0018] 1. Hot water tank; 2. First water pump; 3. Hot water pipe; 4. Underwater pelletizer; 5. Delivery pipe; 6. Metal sieve plate; 7. Return water pipe; 8. Coil; 9. Dehydration centrifuge; 10. Cold water tank; 11. Second water pump; 12. Cold water pipe; 13. Base; 14. Water inlet pipe; 15. Underwater cutter; 16. Water outlet pipe. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0020] See also Figure 1-2 A high-efficiency underwater pelletizing circulation system includes a hot water circulation system and a cold water circulation system. The hot water circulation system includes a hot water tank 1, which is connected to a first water pump 2. The first water pump 2 is connected to an underwater pelletizer 4 via a hot water supply pipe 3, and the underwater pelletizer 4 is connected to the extruder head. The hot water supply pipe 3 is connected to the water inlet pipe 14 of the underwater pelletizer 4. The first water pump 2 is connected to the hot water supply pipe 3 to transport hot water from the hot water tank 1 to the underwater pelletizer 4. The water outlet pipe 16 of the underwater pelletizer 4 is connected to a delivery pipe 5, which is connected to the hot water tank 1 via a return water pipe 7.

[0021] The cold water circulation system includes a cold water tank 10, which is connected to a dehydration centrifuge 9 via a cold water pipe 12 and a coil 8. The dehydration centrifuge 9 is also connected to the cold water tank 10. A second water pump 11 delivers cold water from the cold water tank 10 to the cold water pipe 12. An inclined metal sieve plate 6 is installed between the delivery pipe 5 and the return water pipe 7, and the water inlet side of the metal sieve plate 6 is also connected to the cold water pipe 12.

[0022] The metal sieve plate 6 is tilted in the direction of water flow from the delivery pipe 5 to the cold water pipe 12. The metal sieve plate 6 is positioned between the delivery pipe 5 and the return hot water pipe 7 at an angle of 30-60 degrees to the horizontal. During experiments, the metal sieve plate 6 demonstrated good separation performance at both 30- and 60-degree inclinations. The water flow in the parallel sections of the delivery pipe 5 and the cold water pipe 12 is aligned.

[0023] Coil 8 is arranged longitudinally along its axis. The spiral tube structure of coil 8 prolongs the residence time of the plastic particles within coil 8, allowing them to cool rapidly within coil 8. This longitudinal orientation of coil 8 helps evenly distribute water within coil 8, reducing water short-circuiting and ensuring full utilization of the heat exchange capacity of the entire coil 8.

[0024] The underwater pelletizer 4 includes a base 13, a water inlet pipe 14, an underwater cutter 15, and a water outlet pipe 16. Hot water is introduced into the water inlet pipe 14 to assist the underwater cutter 15 in completing the pelletizing process. After that, the water and the plastic particles are discharged from the water outlet pipe 16 together, thus completing the pelletizing process and being transported through the delivery pipe 5.

[0025] Working principle:

[0026] During operation, after underwater pelletizer 4 completes pelletizing, the pellets are transported through conveying pipe 5 under the action of water flow. After reaching metal sieve plate 6, the plastic pellets follow the inclined direction of metal sieve plate 6 and enter coil 8 for cooling. Hot water passes through metal sieve plate 6 and flows back to hot water tank 1 through return water pipe 7 for recycling. After being fully cooled by cold water in coil 8, the plastic pellets are separated by dehydration centrifuge 9, and the cold water returns to cold water tank 10 for recycling.

[0027] It should be noted that the above content only illustrates the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. For ordinary technicians in this technical field, they can make several improvements and modifications without departing from the principles of the utility model. These improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims

1. A high-efficiency underwater pelletizing circulation system, comprising a hot water circulation system and a cold water circulation system, characterized in that: The hot water circulation system comprises a hot water pool (1), the hot water pool (1) is connected to a first water pump (2), the first water pump (2) is connected to an underwater pelletizer (4) through a hot water supply pipe (3), and the underwater pelletizer (4) is connected to an extruder head, the outlet pipe (16) of the underwater pelletizer (4) is connected to a delivery pipe (5), and the delivery pipe (5) is connected to the hot water pool (1) through a return water pipe (7); the cold water circulation system comprises a cold water pool (10), the cold water pool (10) is connected to a dehydration centrifuge (9) through a cold water supply pipe (12) and a coil (8), and the dehydration centrifuge (9) is connected to the cold water pool (10); an inclined metal sieve plate (6) is provided between the delivery pipe (5) and the return water pipe (7), and the water inlet side of the metal sieve plate (6) is simultaneously connected to the cold water supply pipe (12).

2. A high-efficiency underwater pelletizing circulation system according to claim 1, characterized in that: The inclination direction of the metal sieve plate (6) is along the direction of water flow from the delivery pipe (5) to the cold water delivery pipe (12).

3. A high-efficiency underwater pelletizing circulation system according to claim 2, characterized in that: The metal sieve plate (6) is arranged between the delivery pipe (5) and the return hot water pipe (7) at an angle of 30-60 degrees to the horizontal plane.

4. The high-efficiency underwater pelletizing circulation system according to claim 1, characterized in that: The water flow directions of the parallel sections of the delivery pipe (5) and the cold water delivery pipe (12) are the same.

5. The high-efficiency underwater pelletizing circulation system according to claim 1, characterized in that: The hot water supply pipe (3) is connected to the water inlet pipe (14) of the underwater pelletizer (4).

6. The high-efficiency underwater pelletizing circulation system according to claim 1, characterized in that: The coil (8) is arranged longitudinally along its axis.

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