A purified terephthalic acid filtering device

Abstract

The utility model discloses a kind of terephthalic acid filtering devices, including shell, the shell is installed on external equipment, pressure regulating mechanism is provided on the shell, the pressure regulating mechanism includes water inlet pipe, spacer, filter bag and water outlet pipe, the water inlet pipe and water outlet pipe are respectively installed in the both sides of the shell, the spacer is installed in the shell, the water inlet pipe is connected in the upper layer of spacer, the water outlet pipe is connected in the lower layer of spacer, overflow pipe is equipped with on the water inlet pipe, this innovative terephthalic acid filtering device is through the intelligent pressure regulating system of careful design, effectively solve the technical problem that filter bag in traditional equipment is damaged due to pressure fluctuation, realizes the safe and stable operation of production process, and its core technical advantage lies in introducing an automatic pressure regulating mechanism, can respond to the fluctuation of feed pressure in real time, and automatically start pressure relief protection when pressure exceeds safety threshold.

Description

Technical Field

[0001] This utility model relates to the field of purified terephthalic acid filtration technology, and more specifically, to a purified terephthalic acid filtration device. Background Technology

[0002] In modern chemical industry, purified terephthalic acid (PTA) is a key raw material for the production of polyester fibers and plastics, and its purification process has a decisive impact on product quality. However, the mainstream PTA filtration devices currently on the market face a severe technical challenge in actual production applications—the pressure stability of the filtration system. Specifically, traditional filtration devices must rely on a certain feed pressure to propel the material through the filter medium during operation to ensure sufficient filtration rate and production efficiency. However, this pressure-driven filtration mechanism has an inherent flaw: the filter bag, as a key filtration element, has material properties and structural design that determine that it can only maintain its full functionality within a specific pressure range. In actual production environments, due to factors such as fluctuations in the operating status of upstream equipment, inaccurate pressure regulation of the pumping system, and mismatched valve opening and closing speeds, unpredictable fluctuations in feed pressure often occur, especially during equipment startup, shutdown, or process parameter adjustments, where instantaneous pressure spikes may occur. When this pressure impact exceeds the pressure limit of the filter bag, the filter bag will deform, tear or even be completely damaged. This not only causes the filtration effect to fail immediately, but more seriously, it will cause unfiltered materials to mix into the filtered products, resulting in product contamination and quality accidents.

[0003] A deeper analysis of the technical impact and economic losses reveals that the damage to filter bags has multifaceted and far-reaching effects on production. Firstly, regarding production continuity, a damaged filter bag typically requires immediate shutdown for replacement. Such unplanned downtime can last from hours to days, resulting in significant capacity and economic losses on large-scale chemical production lines. Secondly, from a product quality perspective, contamination caused by damaged filter bags can lead to substandard downstream products. This is particularly true in the production of high-end polyester materials, where even minute amounts of impurities can cause fiber breakage, reduced strength, or color variations, potentially leading to downgraded sales or scrapping of the final product. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, the present invention provides a purified terephthalic acid filtration device to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a purified terephthalic acid filtration device, comprising a housing, the housing being installed on an external device, a pressure regulating mechanism being provided on the housing, the pressure regulating mechanism comprising an inlet pipe, a partition plate, a filter bag, and an outlet pipe, the inlet pipe and the outlet pipe being respectively installed on both sides of the housing, the partition plate being installed inside the housing, the inlet pipe being connected to the upper layer of the partition plate, the outlet pipe being connected to the lower layer of the partition plate, an overflow pipe being connected to the inlet pipe, a transverse pipe being connected to the side wall of the overflow pipe, the transverse pipe being connected to a collection box, the collection box being installed on the side wall of the housing, a threaded pipe being threaded at the upper end of the overflow pipe, a push plate being provided at the lower end of the threaded pipe, the push plate being slidably and sealingly connected to the inner wall of the overflow pipe.

[0008] The present invention is further configured such that a receiving plate is coaxially provided inside the overflow pipe, and a sealing groove is provided on the receiving plate.

[0009] The present invention is further configured such that a sealing disc is attached to the receiving disc and the sealing disc is pressed on the sealing groove, and an intermediate rod is provided on the sealing disc, the intermediate rod being slidably connected to the push plate.

[0010] The present invention is further configured such that a spring is sleeved on the intermediate rod, one end of the spring abuts against the sealing disc, and the other end of the spring abuts against the push plate.

[0011] The present invention is further configured such that a floating sleeve is slidably provided at the lower end of the overflow pipe, and a plurality of sealing rods are provided at equal intervals on the floating sleeve.

[0012] The present invention is further configured such that a plurality of through holes are equally spaced on the side wall of the receiving plate, and the sealing rod corresponds one-to-one with the through holes.

[0013] The present invention is further configured such that a plurality of guide grooves are provided on the side wall of the float sleeve, and a guide strip is provided on the side wall of the overflow pipe, and the guide grooves are slidably connected to the guide strip.

[0014] The present invention is further configured such that a pull plate is provided on the intermediate rod.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides a purified terephthalic acid filtration device, which has the following beneficial effects:

[0017] This innovative purified terephthalic acid filtration device effectively solves the technical problem of filter bag damage due to pressure fluctuations in traditional equipment through a meticulously designed intelligent pressure regulating system, achieving safe and stable operation of the production process. Its core technological advantage lies in the introduction of an automated pressure regulation mechanism that can respond to fluctuations in feed pressure in real time and automatically activate pressure relief protection when the pressure exceeds a safe threshold, promptly releasing excess pressure to a dedicated collection area, thereby protecting the filter elements from damage. When a sudden pressure increase occurs in the production system, this precise pressure regulating device senses the pressure change and automatically opens the pressure relief channel through a sealing assembly controlled by an elastic element, rapidly diverting the liquid exceeding the set threshold to ensure that the pressure flowing through the filter bag remains within a safe range. Compared to traditional passive protection designs, this active pressure management solution has significant advantages in terms of fast response speed and high adjustment accuracy, completing the pressure relief response within milliseconds, effectively preventing impact damage to the filtration system caused by instantaneous high pressure.

[0018] Even more commendable is the integration of intelligent material recovery functionality, achieving highly efficient resource utilization. Through a cleverly designed floating sealing structure, the system can automatically adjust the opening and closing of the return channel according to the operating status. During normal filtration, the floating component rises under the influence of the liquid surface and activates the sealing mechanism, ensuring the airtightness of the pressure relief system. When production stops and the liquid level drops, the floating component moves downward, automatically opening the return channel, allowing the raw materials temporarily stored in the collection area to automatically return to the filtration system, awaiting the next filtration, achieving zero material waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a purified terephthalic acid filtration device according to the present invention;

[0020] Figure 2 In this utility model Figure 1 A schematic diagram of the cross-sectional structure;

[0021] Figure 3 This is a cross-sectional view of the overflow pipe in this utility model;

[0022] Figure 4 This is a schematic diagram of the transverse tube in this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the floating sleeve in this utility model.

[0024] In the diagram: 1. Outer shell; 2. Inlet pipe; 3. Spare plate; 4. Filter bag; 5. Outlet pipe; 6. Overflow pipe; 7. Horizontal pipe; 8. Collection box; 9. Threaded pipe; 10. Push plate; 11. Receiving plate; 12. Sealing groove; 13. Sealing disc; 14. Intermediate rod; 15. Float sleeve; 16. Sealing rod; 17. Through hole; 18. Guide groove; 19. Guide strip; 20. Pull plate; 21. Spring. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] Please see Figure 1-5A purified terephthalic acid filtration device includes a housing 1, which is installed on an external device. A pressure regulating mechanism is provided on the housing 1, comprising an inlet pipe 2, a partition plate 3, a filter bag 4, and an outlet pipe 5. The inlet pipe 2 and outlet pipe 5 are respectively installed on both sides of the housing 1. The partition plate 3 is installed inside the housing 1. The inlet pipe 2 connects to the upper layer of the partition plate 3, and the outlet pipe 5 connects to the lower layer of the partition plate 3. An overflow pipe 6 is connected to the inlet pipe 2. A transverse pipe 7 is connected to the side wall of the overflow pipe 6, and a collection box 8 is connected to the transverse pipe 7. The collection box 8 is installed on the side wall of the housing 1. A threaded pipe 9 is threaded at the upper end of the overflow pipe 6, and a pusher 10 is provided at the lower end of the threaded pipe 9. The pusher 10 is slidably and sealingly connected to the inner wall of the overflow pipe 6. A receiving plate 11 is coaxially provided inside the overflow pipe 6. A sealing groove 12 is provided on the receiving plate 11, and a sealing plate 13 is attached to the receiving plate 11 and pressed on the sealing groove 12. A middle rod 14 is provided on the sealing plate 13 and is slidably connected to the push plate 10. A spring 21 is sleeved on the middle rod 14, with one end of the spring 21 abutting against the sealing plate 13 and the other end of the spring 21 abutting against the push plate 10. A floating sleeve 15 is slidably provided at the lower end of the overflow pipe 6. Multiple sealing rods 16 are provided at equal intervals on the floating sleeve 15. Multiple through holes 17 are provided at equal intervals on the side wall of the receiving plate 11, and the sealing rods 16 and through holes 17 correspond one-to-one. Multiple guide grooves 18 are provided on the side wall of the floating sleeve 15, and guide strips 19 are provided on the side wall of the overflow pipe 6. The guide grooves 18 are slidably connected to the guide strips 19. A pull plate 20 is provided on the middle rod 14.

[0029] In this embodiment, when filtering purified terephthalic acid, the raw material is first introduced into the upper part of the partition plate 3 through the water inlet pipe 2, and then filtered through the filter bag 4 at the upper part. After filtration, the raw material enters the filter bag 4 and is discharged through the water outlet pipe 5, thus completing the filtration process. When there is pressure fluctuation, if the pressure exceeds the elastic force of the spring 21, the seal between the sealing plate 13 and the sealing groove 12 will be released, and the pressure fluctuation part will flow into the collection box 8 through the horizontal pipe 7, thereby avoiding pressure fluctuation.

[0030] More specifically, when the water inlet pipe 2 is under pressure, the float sleeve 15 floats inside the raw material, so the sealing rod 16 is inserted into the through hole 17, thus sealing during operation. When operation stops, the raw material supply stops, the float sleeve 15 descends, and the sealing rod 16 disconnects from the through hole 17. At this time, the raw material in the collection box 8 flows back into the outer shell 1, thus avoiding the accumulation of raw material.

[0031] In summary, during the use or operation of the overall equipment: when filtering purified terephthalic acid, the raw material is first introduced into the upper part of the partition plate 3 through the inlet pipe 2, and then filtered through the filter bag 4 at the upper end. After filtration, the raw material enters the filter bag 4 and is discharged through the outlet pipe 5, thus completing the filtration process. When there is pressure fluctuation, if the pressure exceeds the elastic force of the spring 21, the seal between the sealing plate 13 and the sealing groove 12 will be released, and the pressure fluctuation will flow into the collection box 8 through the horizontal pipe 7, thereby avoiding pressure fluctuation.

[0032] When the inlet pipe 2 is under pressure, the float sleeve 15 floats inside the raw material, so the sealing rod 16 is inserted into the through hole 17, thus sealing during operation. When operation stops, the raw material supply stops, the float sleeve 15 descends, and the sealing rod 16 disconnects from the through hole 17. At this time, the raw material in the collection box 8 flows back into the outer shell 1, thus avoiding the accumulation of raw material.

[0033] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A purified terephthalic acid filtration device, comprising a housing (1), characterized in that: The outer casing (1) is installed on an external device. A pressure regulating mechanism is provided on the outer casing (1). The pressure regulating mechanism includes an inlet pipe (2), a partition plate (3), a filter bag (4), and an outlet pipe (5). The inlet pipe (2) and the outlet pipe (5) are respectively installed on both sides of the outer casing (1). The partition plate (3) is installed inside the outer casing (1). The inlet pipe (2) is connected to the upper layer of the partition plate (3), and the outlet pipe (5) is connected to the lower layer of the partition plate (3). In the lower layer, an overflow pipe (6) is connected to the water inlet pipe (2), a transverse pipe (7) is connected to the side wall of the overflow pipe (6), a collection box (8) is connected to the transverse pipe (7), the collection box (8) is installed on the side wall of the outer shell (1), a threaded pipe (9) is threaded at the upper end of the overflow pipe (6), a push plate (10) is provided at the lower end of the threaded pipe (9), and the push plate (10) is slidably connected to the inner wall of the overflow pipe (6).

2. The purified terephthalic acid filtering device according to claim 1, characterized in that: The overflow pipe (6) is coaxially provided with a receiving plate (11), and a sealing groove (12) is provided on the receiving plate (11).

3. A purified terephthalic acid filtration device according to claim 2, characterized in that: A sealing disc (13) is attached to the receiving disc (11), and the sealing disc (13) is pressed on the sealing groove (12). An intermediate rod (14) is provided on the sealing disc (13), and the intermediate rod (14) is slidably connected to the push disc (10).

4. The purified terephthalic acid filtering device according to claim 3, characterized in that: A spring (21) is sleeved on the intermediate rod (14), one end of the spring (21) abuts against the sealing disc (13), and the other end of the spring (21) abuts against the push plate (10).

5. A purified terephthalic acid filtration apparatus as defined in claim 4, wherein: The lower end of the overflow pipe (6) is slidably provided with a float sleeve (15), and multiple sealing rods (16) are provided at equal intervals on the float sleeve (15).

6. A purified terephthalic acid filtration apparatus as defined in claim 5, wherein: The receiving plate (11) has multiple through holes (17) at equal intervals on its side wall, and the sealing rod (16) and the through holes (17) correspond one to one.

7. A purified terephthalic acid filtration apparatus as defined in claim 6, wherein: The float sleeve (15) has multiple guide grooves (18) on its side wall, and the overflow pipe (6) has a guide strip (19) on its side wall. The guide grooves (18) are slidably connected to the guide strip (19).

8. A purified terephthalic acid filtration apparatus according to claim 7, characterized in that: The intermediate rod (14) is provided with a pull plate (20).

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