A device for facilitating purification of 2-hydroxy-6-naphthoic acid

Abstract

The utility model discloses a kind of purification device of 2-hydroxy-6-naphthalene carboxylic acid, including pretreatment box and evaporator;Pretreatment box is arranged at evaporator side, and is connected by discharge pipe and the feed inlet of evaporator, filter mechanism for filtering treatment to raw material is arranged in pretreatment box, and filtered raw material flows into evaporator by discharge pipe;Filter mechanism includes filter frame and pollution discharge mechanism;Pretreatment box top is opened, and is capped by cover plate, filter frame is detachably installed in pretreatment box, feed pipe is extended to filter frame after being set on cover plate, and pollution discharge mechanism is set in filter frame, for discharging impurity in filter frame.The utility model has the advantages compared with prior art in that: by setting filter frame and pollution discharge mechanism, large particle impurities and other suspended solids in raw material liquid can be effectively removed, the design of pollution discharge mechanism makes the impurities in filter frame can be discharged in time, avoids that impurities accumulate in filter frame.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a device for facilitating the purification of 2-hydroxy-6-naphthoic acid. Background Technology

[0002] In the purification process of 2-hydroxy-6-naphthoic acid (HNA), it is usually necessary to remove solvents and other impurities through an evaporator to obtain a high-purity product. However, if the raw material solution is not adequately filtered and enters the evaporator, it is easy to form scale inside the evaporator, which affects the heat transfer efficiency and may lead to a decrease in product quality; therefore, a purification device for 2-hydroxy-6-naphthoic acid with filtration function is needed.

[0003] Traditional filtration methods often rely on simple filter screens or filter bags. These devices lack self-cleaning functions, easily accumulate impurities, and require frequent manual cleaning. The cleaning process usually requires disassembling the equipment and cleaning manually, which is time-consuming, labor-intensive, and difficult to guarantee the cleaning effect, increasing the complexity of operation and maintenance costs.

[0004] This necessitates a convenient and easy-to-maintain purification device for 2-hydroxy-6-naphthoic acid. Utility Model Content

[0005] The technical problem to be solved by this invention is that filtration equipment is not easy to clean and maintain. The invention provides a purification device for 2-hydroxy-6-naphthoic acid that is easy to maintain.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a device for purifying 2-hydroxy-6-naphthoic acid, comprising a pretreatment chamber and an evaporator;

[0007] The pretreatment chamber is located on one side of the evaporator and is connected to the feed inlet of the evaporator through a discharge pipe. After the raw material enters through the feed pipe on one side of the pretreatment chamber, a filter mechanism is installed inside the pretreatment chamber to filter the raw material. The filtered raw material flows into the evaporator through the discharge pipe.

[0008] The filtration mechanism includes a filter frame and a drain mechanism. After the top of the pretreatment chamber is open, it is sealed with a cover plate. The filter frame is detachably installed in the pretreatment chamber. The feed pipe is set on the cover plate and extends into the filter frame. The drain mechanism is set inside the filter frame to discharge impurities inside the filter frame.

[0009] As an improvement, the pretreatment chamber is equipped with multiple fixing plates, each fixed plate is located at the top of the inner wall, and each fixing plate has a through groove. The top of the outer wall of each filter frame is equipped with a locking block that matches the through groove. The filter frame is a stainless steel frame with mesh openings on all four sides.

[0010] As an improvement, the sewage discharge mechanism includes a sewage discharge valve, a sewage discharge pipe, and a connecting pipe;

[0011] The drain valve is embedded at the bottom of one side wall of the filter frame. The drain pipe is arranged around the drain valve on the outer wall of the filter frame. The pretreatment box has a threaded hole. After the outer wall of the connecting pipe has an external thread groove that matches the thread groove, one end is fixed with an internal threaded pipe. After the connecting pipe rotates through the threaded hole and approaches the drain pipe, the internal threaded pipe and the external thread groove on the outer wall of the drain pipe are matched and threaded together.

[0012] As an improvement, a baffle is formed inside the pretreatment chamber. After the baffle is set below the filter frame, a discharge valve is opened in the center. The filtered solution passes through the discharge valve and is released through the discharge pipe.

[0013] As an improvement, the sewage discharge mechanism also includes a backflushing mechanism; the backflushing mechanism includes spray plates and sprayers;

[0014] The spray plate bolts are installed on the inner wall of the pretreatment tank, and multiple spray plates are installed along the inner wall of the pretreatment tank. After each spray plate is connected to the external water source, multiple sprayers facing the filter frame are installed on the inner wall.

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] 1. By setting up a filter frame and a drain mechanism, large particulate impurities and other suspended solids in the raw material liquid can be effectively removed, ensuring high purity of the raw material liquid entering the evaporator;

[0017] 2. The design of the sewage discharge mechanism allows impurities in the filter frame to be discharged in a timely manner, preventing impurities from accumulating in the filter frame and thus reducing the impact of impurities on subsequent processes;

[0018] 3. The filter frame adopts a detachable installation design, which facilitates maintenance and replacement and reduces downtime;

[0019] 4. The integrated backwashing mechanism can automatically clean the filter frame without stopping the machine, extending the service life of the filter mechanism and reducing the frequency of maintenance. Attached Figure Description

[0020] Figure 1 This is a perspective view of a device for purifying 2-hydroxy-6-naphthoic acid according to the present invention.

[0021] Figure 2 This is a cross-sectional view of a device for purifying 2-hydroxy-6-naphthoic acid according to the present invention.

[0022] Figure 3 This is a schematic diagram of the filter frame of a device for purifying 2-hydroxy-6-naphthoic acid according to the present invention.

[0023] Figure 4This is a schematic diagram of the pretreatment chamber of a device for purifying 2-hydroxy-6-naphthoic acid according to the present invention.

[0024] Figure 5 This is a schematic diagram of the connecting tube of a device for purifying 2-hydroxy-6-naphthoic acid according to the present invention.

[0025] As shown in the figure: 1. Pretreatment chamber; 2. Evaporator; 3. Discharge pipe; 4. Feed pipe; 5. Filter frame; 6. Cover plate; 7. Fixing plate; 8. Through groove; 9. Clamping block; 10. Drain valve; 11. Drain pipe; 12. Connecting pipe; 13. Threaded hole; 14. External threaded groove; 15. Internal threaded pipe; 16. Baffle; 17. Discharge valve; 18. Spray plate; 19. Sprayer. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Example 1

[0029] A device for facilitating the purification of 2-hydroxy-6-naphthoic acid, combined with... Figure 1-3 As shown, it includes a pretreatment chamber 1 and an evaporator 2. The pretreatment chamber 1 is located on one side of the evaporator 2 and is connected to the feed inlet of the evaporator 2 through a discharge pipe 3. After the raw material enters through the feed pipe 4 on one side of the pretreatment chamber 1, a filter mechanism is provided in the pretreatment chamber 1 to filter the raw material. The filtered raw material flows into the evaporator 2 through the discharge pipe 3.

[0030] The filtration mechanism includes a filter frame 5; after the top of the pretreatment box 1 is open, it is covered by a cover plate 6. The filter frame 5 is detachably installed in the pretreatment box 1. The feed pipe 4 is set on the cover plate 6 and extends into the filter frame 5. Multiple fixing plates 7 are set in the pretreatment box 1. Each fixing plate 7 is located at the top of its inner wall. Each fixing plate 7 has a through groove 8. Each outer wall of the filter frame 5 has a locking block 9 that matches the through groove 8. The filter frame 5 is a stainless steel frame with mesh openings on all four sides.

[0031] With the above structure, the cover plate 6 can be opened to install and remove the filter frame 5, thereby facilitating thorough cleaning or replacement of the filter frame 5.

[0032] Example 2

[0033] Based on Example 1, combined with Appendix Figure 4-5 As shown, the filtration mechanism also includes a sewage discharge mechanism. After being installed inside the filter frame 5, the sewage discharge mechanism is used to discharge impurities inside the filter frame 5. The sewage discharge mechanism includes a sewage discharge valve 10, a sewage discharge pipe 11, and a connecting pipe 12. The sewage discharge valve 10 is embedded at the bottom of one side wall of the filter frame 5. The sewage discharge pipe 11 is arranged around the sewage discharge valve 10 on the outer wall of the filter frame 5. A threaded hole 13 is opened on the pretreatment box 1. After the outer wall of the connecting pipe 12 is opened with an external threaded groove 14 that matches the threaded groove, an internal threaded pipe 15 is fixed at one end. After the connecting pipe 12 is continuously rotated through the threaded hole 13 and approaches the sewage discharge pipe 11, the internal threaded pipe 15 is threadedly connected to the external threaded groove 14 on the outer wall of the sewage discharge pipe 11.

[0034] With the above structure, and through the detachable structure of the sewage discharge mechanism and the filter frame 5, after the connecting pipe 12 moves out of the sewage discharge pipe 11 with the cooperation of the threaded hole 13, the filter frame 5 can be disassembled. After the filter frame 5 is installed, the connecting pipe 12 is rotated so that it continuously approaches the sewage discharge pipe 11 with the cooperation of the threaded hole 13 until the internal threaded pipe 15 is threadedly connected to the sewage discharge pipe 11, thus completing the connection operation between the sewage discharge mechanism and the filter frame 5. The above structure facilitates the installation and maintenance of the filter frame 5.

[0035] A baffle 16 is formed inside the pretreatment box 1. After the baffle 16 is set below the filter frame 5, a discharge valve 17 is opened in the center. After the filtered solution passes through the discharge valve 17, it is released through the discharge pipe 3.

[0036] With the above structure, closing the discharge valve 17 facilitates thorough cleaning of the filter frame 5, thereby facilitating the discharge of wastewater from the sewage discharge mechanism;

[0037] It also includes a backflushing mechanism; the backflushing mechanism includes a spray plate 18 and a sprayer 19; the spray plate 18 is bolted to the inner wall of the pretreatment tank 1, and multiple sprayers 18 are arranged along the inner wall of the pretreatment tank 1. After each spray plate 18 is connected to an external water source, multiple sprayers 19 facing the filter frame 5 are arranged on the inner wall.

[0038] The above structure provides a better cleaning effect than directly injecting clean water into the filter frame 5 from the outside, and the backwashing allows impurities on the inner wall of the filter frame 5 to fall off completely.

[0039] In a specific implementation of this utility model, the 2-hydroxy-6-naphthoic acid solution to be treated is added to the filter frame 5 through the feed pipe 4 according to the process requirements. The raw material liquid enters the filter frame 5 through the feed pipe 4. After being filtered by the filter screen, the filtered solution is released through the discharge valve 17 and flows into the evaporator 2 through the discharge pipe 3.

[0040] When cleaning is required, close the discharge valve 17, start the backwash mechanism, the sprayer 19 draws water from the external water source and rinses the filter frame 5, and open the drain valve 10 to discharge impurities through the drain pipe 11 to ensure the inside of the filter frame 5 is clean.

[0041] If necessary, open the cover plate 6 to disassemble the filter frame 5.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for facilitating the purification of 2-hydroxy-6-naphthoic acid, characterized in that: Includes a pretreatment chamber (1) and an evaporator (2); The pretreatment box (1) is located on one side of the evaporator (2) and is connected to the feed port of the evaporator (2) through the discharge pipe (3). After the raw material enters through the feed pipe (4) on one side of the pretreatment box (1), a filter mechanism is provided in the pretreatment box (1) to filter the raw material. The filtered raw material flows into the evaporator (2) through the discharge pipe (3). The filtration mechanism includes a filter frame (5) and a drain mechanism; After the top of the pretreatment box (1) is opened, it is covered by the cover plate (6). The filter frame (5) is detachably installed in the pretreatment box (1). The feed pipe (4) is set on the cover plate (6) and extends into the filter frame (5). The sewage discharge mechanism is set in the filter frame (5) to discharge the impurities in the filter frame (5).

2. The apparatus for facilitating the purification of 2-hydroxy-6-naphthoic acid according to claim 1, characterized in that: The pretreatment box (1) is equipped with multiple fixing plates (7), each fixing plate (7) is located at the top of the inner wall, and each fixing plate (7) has a through groove (8). The top of each outer wall of the filter frame (5) is equipped with a card block (9) that matches the through groove (8). The filter frame (5) is a stainless steel frame with mesh openings on all four sides.

3. The apparatus for facilitating the purification of 2-hydroxy-6-naphthoic acid according to claim 1, characterized in that: The sewage discharge mechanism includes a sewage discharge valve (10), a sewage discharge pipe (11), and a connecting pipe (12); The drain valve (10) is embedded at the bottom of one side wall of the filter frame (5). The drain pipe (11) is arranged around the drain valve (10) on the outer wall of the filter frame (5). The pretreatment box (1) is provided with a threaded hole (13). The outer wall of the connecting pipe (12) is provided with an external threaded groove (14) that matches the threaded groove. One end is fixed with an internal threaded pipe (15). After the connecting pipe (12) rotates continuously through the threaded hole (13) and approaches the drain pipe (11), the internal threaded pipe (15) is threadedly connected to the external threaded groove (14) on the outer wall of the drain pipe (11).

4. The apparatus for facilitating the purification of 2-hydroxy-6-naphthoic acid according to claim 3, characterized in that: The pretreatment box (1) has a baffle (16) formed inside. After the baffle (16) is set below the filter frame (5), a discharge valve (17) is opened in the center. After the filtered solution passes through the discharge valve (17), it is released through the discharge pipe (3).

5. The apparatus for facilitating the purification of 2-hydroxy-6-naphthoic acid according to claim 3, characterized in that: The sewage discharge mechanism also includes a backflushing mechanism; the backflushing mechanism includes a spray plate (18) and a sprayer (19); The spray plates (18) are bolted to the inner wall of the pretreatment box (1), and multiple spray plates (18) are installed along the inner wall of the pretreatment box (1). After each spray plate (18) is connected to the external water source, multiple sprayers (19) facing the filter frame (5) are installed on the inner wall.

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