Recycled polyester pelletizing water purification device

Abstract

The utility model relates to a recycled polyester pelletizing water purification device which comprises a distribution water tank, a pelletizing water tank, a first pipeline, a second pipeline and a third pipeline, the distribution water tank is arranged on the pelletizing water tank, the upper side of the distribution water tank is communicated with an outlet of a pelletizer through the first pipeline, and a first valve is arranged on the first pipeline; the pelletizing water tank comprises a tank body, a partition plate is arranged in the tank body and divides the tank body into a settlement area and a clear water area, the lower end of the partition plate is connected with the inner bottom wall of the tank body, a gap is kept between the upper end of the partition plate and the inner top wall of the tank body, the clear water area of the pelletizing water tank is communicated with the pelletizer inlet through a second pipeline, and the lower side of the distribution water tank is communicated with the settlement area; the two opposite ends of the third pipeline communicate with the first pipeline and the clear water area correspondingly, and a second valve is arranged on the third pipeline. The recycled polyester pelletizing water purification device provided by the utility model can ensure that the pelletizing water flowing back to the pelletizing machine is cleaner, and can realize online cleaning of the pelletizing water tank without stopping the pelletizing water system, and the pelletizing water circulation system operates stably.

Description

Technical Field

[0001] This utility model relates to a water purification device for recycled polyester pellets. Background Technology

[0002] Currently, polyester is slicing using a pelletizer and a pelletizing water supply unit. The pelletizer's function is to slice the polyester into chips. During operation, the pelletizing water supply unit provides cooling water to lower the temperature. However, the pelletizing water discharged from the pelletizer contains dust and impurities, which need to be filtered out. The current process is as follows: the pelletizing water discharged from the pelletizer first passes through a pelletizing water tank for filtration. The filtered water is then pressurized by a circulating pump, cooled by a plate heat exchanger, and flows back into the pelletizer for further cooling. The cooled water then returns to the pelletizing water tank, and this process is repeated. During this process, the pelletizing water tank serves to buffer and store water and filter out dust particles from the pellets.

[0003] The current problems are as follows: After the pelletizing water enters the pelletizing water tank, it is quickly discharged. Some impurities in the pelletizing water cannot be filtered in time and will flow to the pelletizer. On the one hand, when the discharged pelletizing water flows through the plate heat exchanger, it not only causes blockage of the plate heat exchanger, but also increases the frequency of manual cleaning, the amount of manual cleaning, shortens the online operation cycle of the plate heat exchanger, reduces the heat exchange effect, and shortens the life of the plate heat exchanger. Moreover, the pelletizing water with dust and impurities has a poor cooling effect after flowing into the pelletizer. On the other hand, when the pelletizing water with dust passes through the circulation pump, it will block the circulation pump, resulting in a reduction in the amount of water flowing to the pelletizer. In more serious cases, it may cause the flow to stop, affecting the stable operation of the pelletizing water circulation. Utility Model Content

[0004] The purpose of this invention is to provide a water purification device for recycled polyester pellets.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A recycled polyester pelletizing water purification device includes a distribution water tank, a pelletizing water tank, a first pipeline, a second pipeline, and a third pipeline. The distribution water tank is installed on the pelletizing water tank. The upper side of the distribution water tank is connected to the pelletizer outlet through the first pipeline. A first valve is installed on the first pipeline. A first filter screen is installed inside the distribution water tank.

[0007] The pelletizing water tank includes a tank body, and a partition is provided inside the tank body to divide the tank body into a settling zone and a clear water zone. The partition is arranged along the height direction of the tank body, the lower end of the partition is connected to the bottom wall of the tank body, and the upper end of the partition is separated from the top wall of the tank body. The clear water zone of the pelletizing water tank is connected to the inlet of the pelletizer through a second pipeline. The lower side of the distribution water tank is connected to the settling zone of the pelletizing water tank. A second filter screen is provided inside the pelletizing water tank, and the second filter screen is located above the partition.

[0008] The two ends of the third pipeline are respectively connected to the first pipeline and the clear water area of ​​the pelletizing water tank, and a second valve is installed on the third pipeline.

[0009] According to some embodiments of this utility model, a top baffle is provided on the upper side of the pelletizing water tank body, and the top baffle includes multiple sequentially overlapping plate units, which are arranged horizontally.

[0010] According to some embodiments of this utility model, multiple said plate units are arranged in multiple rows and columns.

[0011] According to some embodiments of this utility model, the upper side of the single plate is provided with a handle for easy hand holding.

[0012] According to some embodiments of this utility model, the device further includes a support member located inside the box and above the partition. The support member is used to support the top stop. The support member includes at least one horizontal bar and multiple vertical bars. The horizontal bar is arranged along the length direction of the box, and the vertical bars are arranged along the width direction of the box. The opposite ends of the horizontal bar are connected to the inner wall of the box, and the opposite ends of the vertical bars are connected to the inner wall of the box. The horizontal bar is connected to the vertical bars and is perpendicular to them.

[0013] According to some embodiments of this utility model, the pelletizing water tank includes a main body and a protruding part. The protruding part is disposed on the upper side of the main body, and the main body and the protruding part are connected. The surface area of ​​the protruding part is smaller than the surface area of ​​the main body. The top baffle is disposed on the side of the protruding part away from the main body, and the support member is disposed inside the protruding part.

[0014] According to some embodiments of this utility model, the device further includes a fixing member for fixing the distribution tank. The fixing member includes two transverse support rods and multiple longitudinal support rods. The longitudinal support rods are provided on both sides of the protrusion. The longitudinal support rods extend in the vertical direction. The two transverse support rods are arranged opposite to each other. The lower end of the longitudinal support rod is connected to the main body. The two opposite ends of the transverse support rods are respectively connected to the upper ends of the longitudinal support rods located on both sides of the protrusion. The distribution tank is arranged between the two transverse support rods and connected to the transverse support rods.

[0015] According to some embodiments of this utility model, the settling zone is provided with a first outlet; the clear water zone is provided with a second outlet, and both the first outlet and the second outlet are located at the lower part of the box body.

[0016] According to some embodiments of this utility model, the water distribution tank includes a tank body, which includes a first part, a second part, and a third part connected sequentially from top to bottom. The diameter of the first part is the same, the diameter of the second part gradually increases from top to bottom, and the diameter of the third part is the same. The first filter screen is disposed in the third part.

[0017] According to some embodiments of this utility model, the first filter screen is an insert filter screen.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] The recycled polyester pelletizing water purification device provided by this utility model allows the pelletizing water discharged from the pelletizer to first enter the settling zone, where dust and impurities remain. The clean pelletizing water overflows into the clear water zone and then flows back to the pelletizer, ensuring that the pelletizing water returning to the pelletizer is cleaner. This significantly reduces the cleaning frequency of the plate heat exchanger and extends its lifespan. By setting a third pipeline and a second valve, the pelletizing water tank can be cleaned online without stopping the pelletizing water system, ensuring stable operation of the pelletizing water circulation system. Attached Figure Description

[0020] Appendix Figure 1 Structural diagram of the recycled polyester pellet water purification device provided by this utility model;

[0021] Appendix Figure 2 The front view of the pelletizing water tank of the recycled polyester pelletizing water purification device provided by this utility model;

[0022] Appendix Figure 3 A top view of the top baffle of the recycled polyester pellet water purification device provided by this utility model;

[0023] Appendix Figure 4 A top view of the support component of the recycled polyester pellet water purification device provided by this utility model;

[0024] Appendix Figure 5 A top view of the second filter screen of the recycled polyester pellet water purification device provided by this utility model;

[0025] Appendix Figure 6 A top view of the plate unit of the recycled polyester pellet water purification device provided by this utility model;

[0026] Appendix Figure 7 A front view of the distribution tank of the recycled polyester pellet water purification device provided by this utility model;

[0027] Appendix Figure 8 A top view of the distribution tank of the recycled polyester pellet water purification device provided by this utility model;

[0028] Appendix Figure 9 A top view of the first filter screen of the recycled polyester pellet water purification device provided by this utility model;

[0029] Appendix Figure 10 A top view of the water distribution tank and fixing components of the recycled polyester pellet water purification device provided by this utility model;

[0030] Appendix Figure 11 The side view of the water distribution tank and fixing components of the recycled polyester pellet water purification device provided by this utility model.

[0031] In the attached diagrams above:

[0032] 1-Distribution water tank, 101-First part, 102-Second part, 103-Third part; 2-Pelletizing water tank, 201-Main body, 2011-First outlet, 2012-Second outlet, 202-Protrusion; 3-Plate unit; 4-Horizontal bar; 5-Vertical bar; 6-First filter screen; 7-Second filter screen; 8-First pipeline; 9-Second pipeline; 10-Third pipeline; 11-Horizontal support bar; 12-Vertical support bar; 13-Pelletizer; 14-First valve; 15-Second valve; 16-Plate heat exchanger; 17-Baffle plate; 18-Handle; 19-Circulation pump. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] See Figures 1 to 11 The recycled polyester pelletizing water purification device shown includes a distribution tank 1, a pelletizing water tank 2, a first pipeline 8, a second pipeline 9, and a third pipeline 10, wherein:

[0036] The distribution water tank 1 is installed on the pelletizing water tank 2. The lower side of the distribution water tank 1 is connected to the settling zone of the pelletizing water tank 2, and the upper side of the distribution water tank 1 is connected to the outlet of the pelletizer 13 through the first pipeline 8. The first pipeline 8 is equipped with a first valve 14. The distribution water tank 1 is equipped with a first filter screen 6, which has multiple filter holes. The first filter screen 6 is used to filter impurities in the pelletizing water (used as a cooling medium, such as cooling water, during the operation of the pelletizer 13) entering the distribution water tank 1.

[0037] The pelletizing tank 2 includes a tank body, which is rectangular in shape. The tank body includes an upper and lower side, a left and right side, and a front and rear side arranged opposite to each other. A partition 17 is provided inside the tank to divide the internal space into a settling zone. Figure 1 (as referred to in a) and the clear water area ( Figure 1 (as indicated by b) The settling zone and the clear water zone are connected. The partition 17 is set along the height of the box. The lower end of the partition 17 is connected to the bottom wall of the box, and the upper end of the partition 17 is separated from the top wall of the box. If the front end and the rear end of the partition 17 are connected to the front wall and the rear wall of the box respectively, the settling zone and the clear water zone are arranged side to side. If the left end and the right end of the partition 17 are connected to the left wall and the right wall of the box respectively, the settling zone and the clear water zone are arranged front to back.

[0038] The pelletizing water tank 2 is equipped with a second filter screen 7, which is located above the partition plate 17. The second filter screen 7 has multiple filter holes and is used to filter impurities in the pelletizing water entering the pelletizing water tank 2.

[0039] The settling zone of the pelletizing water tank 2 is connected to the lower side of the distribution water tank 1. The clear water zone of the pelletizing water tank 2 is connected to the inlet of the pelletizer 13 through the second pipeline 9. The pelletizing water containing impurities discharged from the outlet of the pelletizer 13 first enters the distribution water tank 1 for the first filtration, and then enters the settling zone of the pelletizing water tank 2. After settling, the clear water overflows from the upper part of the tank to the clear water zone, and then flows from the clear water zone to the circulating pump 19, the plate heat exchanger 16, and finally enters the pelletizer 13. The pelletizing water flowing out of the distribution tank 1 first enters the settling zone of the pelletizing tank 2, and then enters the clear water zone of the pelletizing tank 2. The advantage of this setting is that although the pelletizing water flowing out of the distribution tank 1 is filtered by the first filter screen 6 and the second filter screen 7, it still contains some dust and impurities. It first enters the settling zone, where the dust and impurities remain, and the clean pelletizing water overflows into the clear water zone, and then flows from the clear water zone to the pelletizer 13. This ensures that the pelletizing water returning to the pelletizer 13 is cleaner, greatly reduces the cleaning frequency of the plate heat exchanger, and extends the life of the plate heat exchanger.

[0040] In some embodiments, the settling zone is provided with a first outlet 2011; the clear water zone is provided with a second outlet 2012, and both the first outlet 2011 and the second outlet 2012 are located at the bottom of the tank. Discharge pipes are provided at both the first outlet 2011 and the second outlet 2012, and valves are installed on the discharge pipes. When cleaning the settling zone and the clear water zone, the valves are opened to discharge the water stored in the settling zone and the clear water zone.

[0041] In this example, the two ends of the third pipeline 10 are connected to the first pipeline 8 and the clear water area of ​​the pelletizing water tank 2, respectively. A second valve 15 is installed on the third pipeline 10. A circulation pump 19 is installed on the second pipeline 9. The pelletized water (pelletized water) coming out of the pelletizing water tank 2 is pressurized by the circulation pump 19.

[0042] When it is necessary to clean the settling zone of the pelletizing water tank 2, close the first valve 14 and open the second valve 15. The pelletizing water supply in the settling zone will stop, and the pelletizing water coming out of the pelletizer 13 will enter the clean water zone, isolating the settling zone and facilitating the cleaning of dust and impurities inside the settling zone. Before cleaning, open the first outlet 2011 of the settling zone to drain the water in the settling zone before cleaning. This allows for online cleaning of the pelletizing water tank 2 without stopping the pelletizing water system.

[0043] In some embodiments, a top baffle is provided on the upper side of the pelletizing water tank 2. The top baffle includes multiple sequentially overlapping single-piece plates 3. Since the pelletizing water tank 2 is 4.5 meters long, 3 meters wide, and has a surface area of ​​13.5 square meters, considering both the need to cover and protect the upper side of the pelletizing water tank 2 and the ease of daily operation and cleaning, the upper side of the pelletizing water tank 2 is opened to allow operators to enter the tank for cleaning. The top baffle is configured as multiple single-piece plates 3, with adjacent single-piece plates 3 overlapping (overlapping means placing one end of a single-piece plate 3 on the upper surface of one end of an adjacent single-piece plate 3, i.e., the two single-piece plates 3 partially overlap, and the overlapping area of ​​the single-piece plates 3 achieves relative sealing). This prevents sand, dust, and other debris from entering the tank during production, and also prevents rain and snow from entering the pelletizing water tank 2 and contaminating the pelletizing water inside. Furthermore, it allows operators to easily access the pelletizing water tank 2 after removing the single-piece plates 3. The plate unit 3 has an opening that communicates with the water distribution tank.

[0044] In some embodiments, multiple plate units 3 are arranged in multiple rows and columns, such as Figure 3 There are ten plate units 3, arranged in two rows and five columns along the length of the pelletizing tank 2. In each row, the ends of two adjacent plate units 3 that are close to each other press against each other. The plate units 3 are made of metal and are horizontal plates. When two adjacent plate units 3 overlap, they can be fixedly connected without fasteners.

[0045] Preferably, the upper side of the pelletizing unit 3 is provided with a handle 18 for easy hand holding. When it is necessary to clean the pelletizing water tank 2, the pelletizing unit 3 can be removed. The handle 18 makes it convenient for the operator to pick up and put down the pelletizing unit 3.

[0046] In this example, the device also includes a support member located inside the housing and above the partition 17. The support member supports the top stop, which is mounted on the support member. The support member includes at least one horizontal bar 4 and multiple vertical bars 5. The horizontal bar 4 is arranged along the length of the housing, and the vertical bars 5 are arranged along the width of the housing. The opposite ends of the horizontal bar 4 are connected to the inner walls of opposite sides of the housing, and the opposite ends of the vertical bars 5 are connected to the inner walls of the other opposite sides of the housing. The horizontal bar 4 and the vertical bars 5 are connected and perpendicular to each other. Multiple plate units 3 are placed on the horizontal bar 4 and the vertical bars 5, such that one end of a plate unit 3 distributed in the front-back direction abuts against the horizontal bar 5, and another end of a plate unit 3 abuts against the horizontal bar 5. The support member ensures the stability of the top stop and facilitates its installation and removal.

[0047] In this example, the plate unit 3 is preferably made of S30408 ​​stainless steel plate with a thickness of 1.5 mm, and the crossbar 4 and the longitudinal bar 5 are preferably stainless steel angle iron to prevent the plate unit 3 from collapsing.

[0048] See Figure 7 The pelletizing water tank 2 includes a main body 201 and a protrusion 202. The protrusion 202 is located on the upper side of the main body 201, and the main body 201 and the protrusion 202 are continuous. The surface area of ​​the protrusion 202 is smaller than the surface area of ​​the main body 201. A top baffle is located on the upper side of the protrusion 202 away from the main body 201, a support member is located inside the protrusion 202, and the distributing water tank 1 is located on the side of the protrusion 202 away from the main body 201. By providing the protrusion 202 and reducing the surface area of ​​the top baffle, a smaller number of individual plates 3 can be installed, which facilitates access to the tank by removing the individual plates 3 while improving the sealing performance of the tank.

[0049] In some embodiments, the water distribution tank 1 includes a tank body, which includes a first part 101, a second part 102, and a third part 103 connected from top to bottom. The diameter of the first part 101 is the same, the diameter of the second part 102 gradually increases from top to bottom, and the diameter of the third part 103 is the same. The first filter screen 6 is disposed in the third part 103, and the diameter of the third part 103 is larger than the diameter of the first part 101.

[0050] In some implementations, the first filter screen 6 is an insert filter screen.

[0051] In this example, the device also includes a fixing member for fixing the distributing water tank 1. Since the top stop is located on the side of the protrusion 202 away from the main body 201, the fixing member is not connected to the plate unit 3. The distributing water tank 1 is fixed by setting the fixing member outside the pelletizing water tank 2. In one embodiment, the fixing member includes two transverse support rods 11 and multiple longitudinal support rods 12. Longitudinal support rods 12 are provided on both opposite sides of the protrusion 202. The longitudinal support rods 12 extend in the vertical direction. The two transverse support rods 11 are arranged opposite each other. The extension direction of the transverse support rods 11 is parallel to the width direction of the pelletizing water tank 2 and parallel to the length direction of the pelletizing water tank 2. The lower end of the longitudinal support rod 12 is provided on the main body 201 and connected to the main body 201. The upper ends of the transverse support rods 11 are connected to the longitudinal support rods 12. The distributing water tank 1 is located between the two transverse support rods 11 and connected to the transverse support rods 11. Preferably, the third part 103 of the distributing water tank 1 is connected to the two transverse support rods 11.

[0052] The advantages of the recycled polyester pelletizing water purification device in this example are as follows: the pelletizing water discharged from the pelletizer first enters the settling zone, where dust and impurities remain, and the clean pelletizing water overflows into the clean water zone, and then flows back to the pelletizer. This ensures that the pelletizing water returning to the pelletizer is cleaner, greatly reducing the cleaning frequency of the plate heat exchanger and extending its lifespan. By setting up a third pipeline and a second valve, the pelletizing water tank can be cleaned online without stopping the pelletizing water system, ensuring stable operation of the pelletizing water circulation system.

[0053] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A water purification device for recycled polyester pellets, characterized in that, It includes a distribution water tank, a pelletizing water tank, a first pipeline, a second pipeline, and a third pipeline. The distribution water tank is installed on the pelletizing water tank. The upper side of the distribution water tank is connected to the outlet of the pelletizer through the first pipeline. A first valve is installed on the first pipeline. A first filter screen is installed inside the distribution water tank. The pelletizing water tank includes a tank body, and a partition is provided inside the tank body along the height direction to divide the tank body into a settling zone and a clear water zone. The lower end of the partition is connected to the bottom wall of the tank body, and the upper end of the partition is separated from the top wall of the tank body. The clear water zone of the pelletizing water tank is connected to the pelletizer inlet through a second pipeline, and the settling zone of the pelletizing water tank is connected to the lower side of the distribution water tank. A second filter screen is provided inside the pelletizing water tank, and the second filter screen is located above the partition. The two ends of the third pipeline are respectively connected to the first pipeline and the clear water area of ​​the pelletizing water tank, and a second valve is installed on the third pipeline.

2. The recycled polyester pellet water purification device according to claim 1, characterized in that, The pelletizing tank has a top baffle on its upper side, which consists of multiple sequentially overlapping plate units, which are horizontally arranged.

3. The recycled polyester pellet water purification device according to claim 2, characterized in that, The aforementioned single-unit plates are arranged in multiple rows and columns.

4. The recycled polyester pelletizing water purification device according to claim 2, characterized in that, The upper side of the plate unit is provided with a handle for easy hand holding.

5. The recycled polyester pellet water purification device according to claim 2, characterized in that, The device further includes a support member located inside the box and above the partition. The support member supports the top stop and includes at least one horizontal bar and multiple vertical bars. The horizontal bar is arranged along the length of the box and the vertical bars are arranged along the width of the box. The opposite ends of the horizontal bar are respectively connected to the inner walls of opposite sides of the box, and the opposite ends of the vertical bars are respectively connected to the inner walls of the other opposite sides of the box. The horizontal bar is connected to and perpendicular to the vertical bars.

6. The recycled polyester pelletizing water purification device according to claim 5, characterized in that, The pelletizing tank includes a main body and a protruding part. The protruding part is located on the upper side of the main body and the main body and the protruding part are connected. The surface area of ​​the protruding part is smaller than the surface area of ​​the main body. The top baffle is located on the side of the protruding part away from the main body, and the support member is located inside the protruding part.

7. The recycled polyester pelletizing water purification device according to claim 6, characterized in that, The device further includes a fixing component for fixing the distribution tank. The fixing component includes two transverse support rods and multiple longitudinal support rods. The longitudinal support rods are provided on both sides of the protrusion. The longitudinal support rods extend in the vertical direction. The two transverse support rods are arranged opposite each other. The lower end of the longitudinal support rod is connected to the main body. The two ends of the transverse support rods are respectively connected to the upper ends of the longitudinal support rods located on both sides of the protrusion. The distribution tank is arranged between the two transverse support rods and connected to the transverse support rods.

8. The recycled polyester pelletizing water purification device according to claim 1, characterized in that, The settling zone is provided with a first outlet; the clear water zone is provided with a second outlet, and both the first outlet and the second outlet are located at the bottom of the tank.

9. The recycled polyester pellet water purification device according to claim 1, characterized in that, The water distribution tank includes a tank body, which comprises a first part, a second part, and a third part connected sequentially from top to bottom. The diameter of the first part is the same, the diameter of the second part gradually increases from top to bottom, and the diameter of the third part is the same. The first filter screen is disposed in the third part.

10. The recycled polyester pelletizing water purification device according to claim 1, characterized in that, The first filter screen is an insert filter screen.

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