A granulator water discharge filter

Abstract

The utility model relates to the technical field of granulator filter device, specifically is a granulator drainage filter device. The utility model discloses a sedimentation tank is set up in the drainage port, and installs filter screen at the water inlet pipe, and cooperates the settlement tank of sedimentation tank bottom, and has constructed double filtration settlement system. The filter screen intercepts larger particle impurities first, and the settlement tank carries out settlement to the tiny impurities that still suspend in the cooling water after preliminary filtration, and the impurity content in the cooling water is reduced significantly, provides the purer water source for the subsequent granulation link, thereby the precision and quality of granulation are improved, and the substandard rate caused by the impurity mixing is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of granulator filtration devices, specifically a granulator drainage filtration device. Background Technology

[0002] When a plastic pellet mill is operating, factors such as residual impurities in the raw materials, insufficient pretreatment, and improper control of melting and cooling process parameters can cause a large amount of debris and impurities to remain in the cooling circulating water. The hazards are multifaceted: debris in the cooling water can easily clog pipes, filters, and water pumps, accelerating equipment wear, leading to decreased cooling system efficiency or even shutdown, increasing equipment maintenance costs and repair frequency; if impurities flow back to the production stage with the circulating water, they will mix into new pellets, causing rough pellet surfaces, uneven sizes, or decreased mechanical properties, increasing the defect rate; poor heat dissipation due to impurity deposition in the cooling system can lead to insufficient pellet solidification, affecting pelleting accuracy and subsequent packaging and storage, and even causing pellet adhesion and clumping; furthermore, direct discharge of wastewater containing impurities can easily violate environmental standards due to excessive suspended solids, facing the risk of increased treatment costs or environmental penalties, while debris accumulation may breed microorganisms, polluting the working environment and creating safety hazards; debris formed from unmelted materials can also cause raw material waste, increasing production costs and seriously affecting the economic efficiency and stability of pelleting production.

[0003] Therefore, to address the issue of residual impurities in the cooling water of plastic pellet mills, designers often employ multi-layered filtration, using filter screens with different pore sizes to intercept impurities of varying sizes. However, this filtration method has significant limitations: Firstly, as the filter screen pore size decreases at each stage, the resistance encountered by the water flow increases exponentially, leading not only to increased cooling water pump load and significantly higher energy consumption, but also to insufficient cooling water circulation flow, resulting in decreased cooling efficiency of the pellet mill. To maintain stable system operation, additional fresh cooling water must be added, further increasing water consumption and production costs. Secondly, due to limitations in the minimum pore size of the filter screen and the complexity of impurity shapes, some micron-sized fine particles and fibrous impurities can still penetrate the filter screen, making thorough filtration difficult and posing a challenge to improving the quality of granulated products. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a granulator drainage filtration device. This utility model, through the combined use of a filter screen and a sedimentation tank, can settle impurities in the filtered cooling water, further reducing the impurity content in the cooling water and improving the subsequent granulation quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A granulator drainage filtration device includes a sedimentation tank installed at the drain outlet of the granulator, an inlet pipe and an outlet pipe installed on the sedimentation tank, and a filter screen installed on the inlet pipe; a sedimentation trough is provided at the bottom of the sedimentation tank.

[0007] As a further embodiment of this utility model: the sedimentation tank is a U-shaped tank, and the length direction of the sedimentation tank is perpendicular to the water flow direction in the sedimentation tank.

[0008] As a further improvement of this utility model: the opening of the sedimentation tank is inclined in the direction of the water flow in the sedimentation pool, and the included angle between the two is an acute angle.

[0009] As a further improvement of this utility model: each sedimentation tank is parallel to the other and is arranged evenly in sequence along the direction of water flow in the sedimentation tank.

[0010] As a further improvement of this utility model: a hanging groove is recessed on the water inlet pipe located in the sedimentation tank, and a hanging ear is installed on the filter screen, with the hanging ear hooked in the hanging groove.

[0011] As a further improvement of this utility model: a mesh ring is provided at the mesh opening of the filter screen, and the hanging ear is installed on the mesh ring.

[0012] As a further improvement of this utility model, it includes multiple filter screens, and each filter screen is nested in sequence from the inside to the outside according to the size of the pores, from largest to smallest.

[0013] As a further improvement of this utility model: each filter screen has a mesh ring installed at its mesh opening, the diameter of each mesh ring gradually increases according to the nesting sequence of the filter screens, and the corresponding size of each hanging ear also gradually increases.

[0014] As a further improvement of this utility model, the inlet pipe and the outlet pipe are respectively arranged on opposite sides of the sedimentation tank, and the water flow direction is from the inlet pipe to the outlet pipe.

[0015] As a further improvement of this utility model, a barrier net is installed at the inlet of the water outlet pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model constructs a dual filtration and sedimentation system by setting a sedimentation tank at the drain outlet and installing a filter screen on the inlet pipe, in conjunction with a sedimentation trough at the bottom of the sedimentation tank. The filter screen first intercepts larger particulate impurities, while the sedimentation trough settles the tiny impurities that remain suspended in the cooling water after the initial filtration, significantly reducing the impurity content in the cooling water. This provides a cleaner water source for the subsequent granulation process, thereby improving the precision and quality of granulation and reducing the defect rate caused by impurities.

[0018] 2. Designing the sedimentation tank as a U-shaped trough, with its length perpendicular to the water flow direction in the sedimentation tank, effectively alters the flow path and velocity distribution of the water near the sedimentation tank. The vertical layout creates turbulence as the water flows through the sedimentation tank, making it easier for impurities to detach from the water flow and settle into the U-shaped trough. Compared to other shapes and layouts, this design significantly enhances the sedimentation tank's ability to capture impurities, improving sedimentation efficiency and effectiveness.

[0019] 3. The sedimentation tank opening is inclined at an acute angle towards the water flow direction, making full use of the impact force of the water flow. When water flows through the sedimentation tank, the inclined opening guides the water carrying impurities to enter the tank more smoothly. Under the impact of the water flow and gravity, the impurities quickly fall to the bottom of the sedimentation tank, effectively preventing impurities from accumulating at the opening or being carried away by the water flow again. This further improves the sedimentation tank's collection effect on impurities and ensures the stability of the cooling water quality.

[0020] 4. The sedimentation tanks are arranged parallel to each other and evenly along the water flow direction, resulting in a more uniform water flow distribution within the sedimentation tank and preventing localized areas of excessively fast or slow water flow. This uniform water flow environment ensures that each sedimentation tank can function effectively, comprehensively and evenly settling impurities in the cooling water, improving the overall efficiency and stability of the sedimentation system, and guaranteeing the consistency and reliability of impurity removal.

[0021] 5. The recessed groove on the inlet pipe mates with the hanging ears on the filter screen, providing a convenient way to install and remove the filter screen. This hanging structure requires no complicated tools or operations, allowing staff to easily install or remove the filter screen for cleaning and replacement, reducing maintenance difficulty and time costs, improving the convenience and efficiency of equipment maintenance, and ensuring that the filter screen is always in good working condition.

[0022] 6. The filter screen opening is equipped with a mesh ring, on which the mounting ears are installed, enhancing the stability and strength of the filter screen structure. The mesh ring effectively supports the filter screen, preventing it from deforming or breaking under the impact of water flow. At the same time, it provides a solid mounting base for the mounting ears, ensuring a stable connection between the mounting ears and the mounting groove. This allows the filter screen to maintain reliable filtration performance during operation and extends its service life.

[0023] 7. Multiple filter screens are nested together in descending order of pore size, forming a multi-stage fine filtration system. The large-pore filter screen first intercepts larger particles of impurities, while the subsequent small-pore filter screens further filter out tiny particles. This achieves layer-by-layer screening of impurities of different particle sizes, greatly improving filtration accuracy and effectiveness. It can meet the high cleanliness requirements of cooling water in the granulation process and effectively ensure granulation quality.

[0024] 8. The diameter of each filter screen ring and the size of the hanging lugs gradually increase with the sequence of insertion, ensuring that multiple filter screens can be tightly and stably inserted together, while facilitating installation and disassembly. The reasonable size design ensures that each layer of filter screen will not misalign or loosen under the action of water flow, maintaining the integrity and stability of the multi-stage filtration structure, allowing each layer of filter screen to fully exert its filtration function, and improving the overall filtration performance.

[0025] 9. The inlet and outlet pipes are placed on opposite sides of the sedimentation tank with unidirectional water flow. This layout optimizes the water flow path within the sedimentation tank. The water can fully diffuse and flow within the sedimentation tank, extending the residence time of impurities and allowing them more time to settle. It also avoids short-circuiting of the water flow, improving the space utilization and sedimentation efficiency of the sedimentation tank, and ensuring effective purification of the cooling water.

[0026] 10. A baffle net is installed at the inlet of the outlet pipe, adding a protective barrier to the final discharge stage of the cooling water. The baffle net can intercept tiny impurities that may remain during sedimentation and filtration, or small amounts of impurities that may be carried out by the water flow in the sedimentation tank, preventing these impurities from entering the subsequent system. This further ensures the cleanliness of the discharged cooling water, avoids adverse effects on subsequent equipment and the granulation process, and improves the reliability and stability of the entire drainage filtration device. Attached Figure Description

[0027] Figure 1 This is a top view of the overall structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the internal structure of the sedimentation tank in this utility model.

[0029] Figure 3 This is a schematic diagram of the structure of the filter screen and the water inlet pipe in this utility model.

[0030] In the diagram: 10, sedimentation tank; 11, sedimentation trough; 20, inlet pipe; 21, hanging trough; 30, filter screen; 31, mesh ring; 32, hanging ear; 40, outlet pipe; 41, barrier net. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-3During actual installation, the sedimentation tank 40 of this granulator drainage filtration device is tightly installed at the granulator's drain outlet to ensure that the drainage can flow smoothly into the sedimentation tank 40. An inlet pipe 20 and an outlet pipe 40 are installed on opposite side walls of the sedimentation tank 40, ensuring the water flow direction is from the inlet pipe 20 to the outlet pipe 40. One end of the inlet pipe 20 is connected to the granulator's drain outlet, and the other end extends into the sedimentation tank 40. A hanging groove 21 is recessed on the inlet pipe 20 located within the sedimentation tank 40. One end of the outlet pipe 40 is connected to the sedimentation tank 40, and the other end is connected to the subsequent water supply or circulating drainage system. A barrier net 41 is installed at the inlet of the outlet pipe 40. The barrier net 41 can be made of metal wire mesh and is installed at the inlet of the outlet pipe 40 by welding or bolting. The mesh size is selected according to actual needs to intercept small impurities.

[0033] For the filter screen 30 assembly, prepare multiple filter screens 30, and nest them sequentially from the inside out, according to their aperture size from largest to smallest. Install a mesh ring 31 at the mesh opening of each filter screen 30. The mesh ring 31 can be made of stainless steel and is connected to the filter screen 30 by welding. The diameter of each mesh ring 31 gradually increases according to the nesting sequence of the filter screens 30, and mounting ears 32 are installed on the mesh rings 31, with each mounting ear 32 also gradually increasing in size. Hang the assembled filter screen 30 assembly in the mounting groove 21 of the water inlet pipe 20 using the mounting ears 32 to complete the installation of the filter screen 30.

[0034] A sedimentation tank 40 has a sedimentation trough 11 at its bottom. The sedimentation trough 11 is U-shaped, with its length perpendicular to the water flow direction in the sedimentation tank 40 and its opening inclined towards the water flow direction in the sedimentation tank 40. The included angle between the two is set at 30°, which can be adjusted between 15° and 45° according to the actual working conditions. The sedimentation troughs 11 are parallel to each other and are evenly arranged sequentially along the water flow direction in the sedimentation tank 40. The spacing between adjacent sedimentation troughs 11 can be set to 10-20 cm according to the size of the sedimentation tank 40.

[0035] When the granulator starts draining water, the cooling water containing impurities enters the sedimentation tank 40 through the inlet pipe 20. First, the filter screen 30 on the inlet pipe 20 initially intercepts larger particles of impurities in the cooling water. Since multiple filter screens 30 are nested together according to their pore size from largest to smallest, the large-pore filter screen 30 filters out large particles first, and the subsequent small-pore filter screen 30 further filters out tiny particles, achieving multi-stage fine filtration. The filtered cooling water continues to flow in the sedimentation tank 40. When the water flows through the sedimentation tank 11, the vertical and inclined sedimentation tank 11 creates turbulence in the water flow. Under the impact of the water flow and gravity, impurities quickly settle into the U-shaped sedimentation tank 11. After sedimentation in the sedimentation tank 11, the cooling water flows out through the outlet pipe 40. The barrier screen 41 at the inlet of the outlet pipe 40 performs a final interception of any remaining tiny impurities, ensuring that the discharged cooling water reaches a high level of cleanliness, providing a high-quality water source for the subsequent granulation process, thereby improving granulation quality and production efficiency.

[0036] In terms of equipment maintenance, when it is necessary to clean or replace the filter screen 30, the staff does not need to use complicated tools. They can simply lift the filter screen 30 assembly upwards to make the hanging ear 32 disengage from the hanging groove 21, and the filter screen 30 can be easily removed. The operation is simple and quick, which makes it easy to clean impurities in a timely manner, ensure the filtration performance of the filter screen 30, and thus maintain the efficient operation of the entire drainage filtration device.

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

Claims

1. A granulator drain filter apparatus, characterized by, The sedimentation tank (10) is installed at the drain outlet of the granulator. The sedimentation tank (10) is equipped with an inlet pipe (20) and an outlet pipe (40), and a filter screen (30) is installed on the inlet pipe (20). A sedimentation tank (11) is provided at the bottom of the sedimentation tank (10).

2. A granulator water discharge filter according to claim 1, characterised in that, The sedimentation tank (11) is a U-shaped tank, and the length of the sedimentation tank (11) is perpendicular to the water flow direction in the sedimentation tank (10).

3. A granulator water drain filter apparatus according to claim 2, characterised in that, The opening of the sedimentation tank (11) is inclined toward the direction of water flow in the sedimentation tank (10), and the included angle between the two is an acute angle.

4. A granulator water drain filter apparatus according to claim 3, characterised in that, Each sedimentation tank (11) is parallel to each other and is arranged evenly in sequence along the water flow direction in the sedimentation tank (10).

5. A granulator water drain filter apparatus according to any one of claims 1 to 4 wherein, The inlet pipe (20) located in the sedimentation tank (10) has a recessed hanging groove (21), and the filter screen (30) is equipped with a hanging ear (32), which is hung in the hanging groove (21).

6. A granulator water drain filter apparatus according to claim 5, wherein, The filter screen (30) has a mesh ring (31) at the mesh opening, and the hanging ear (32) is installed on the mesh ring (31).

7. A granulator water drain filter apparatus according to claim 6, characterised in that, It includes multiple filter screens (30), and each filter screen (30) is nested in sequence from the inside to the outside according to the pore size from large to small.

8. A granulator water drain filter apparatus according to claim 7, characterised in that, Each filter screen (30) has a mesh ring (31) installed at its mesh opening. The diameter of each mesh ring (31) gradually increases according to the stitching sequence of the filter screen (30), and the corresponding size of each hanging ear (32) also gradually increases.

9. A granulator water drain filter apparatus according to claim 8, characterised in that, The inlet pipe (20) and outlet pipe (40) are respectively arranged on opposite sides of the sedimentation tank (10), and the water flow direction is from the inlet pipe (20) to the outlet pipe (40).

10. A granulator water drain filter apparatus according to claim 9, wherein, A barrier net (41) is installed at the inlet of the water outlet pipe (40).

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