An explosion-proof solvent recovery tower for water-based paint production

Abstract

The utility model discloses an explosion -proof solvent recovery tower for water -based paint production relates to water -based paint production technical field, including solvent recovery tower body, the outside portion of solvent recovery tower body is installed with reflux condensation mechanism, the bottom of solvent recovery tower body is installed with heating mechanism, the outside portion of solvent recovery tower body is installed with pressure -relief valve, the inside wall of solvent recovery tower body is equipped with annular groove, rotates and is installed with the rotating ring in annular groove, and this application is combined to form circular packing layer through a plurality of sector boxes, and cooperates rotating ring, rotating mechanism and fixed mechanism, realizes the automatic connection of sector box rotation to maintenance hole position and arc -shaped sealing plate, and the operation procedure is simplified, and the maintenance time is shortened, and the solvent steam leakage risk is reduced, guarantees the production continuity and the explosion -proof safety, guarantees the integrity and mass transfer efficiency of packing layer simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of water-based paint production technology, and in particular to an explosion-proof solvent recovery tower for water-based paint production. Background Technology

[0002] In the production of water-based paints, a large amount of organic solvents are used to adjust the viscosity, flowability, and drying performance of the paint solution. Direct discharge of these organic solvents not only wastes resources but also pollutes the environment. Therefore, solvent recovery towers are needed to recycle and reuse them. Distillation is a commonly used method for solvent recovery in water-based paint production due to its high separation efficiency and wide applicability. It involves heating the mixture to vaporize low-boiling-point organic solvents, followed by condensation and reflux to purify the solvent. The packing material, as a core component in the distillation tower that enhances gas-liquid mass transfer, plays a crucial role in the recovery efficiency.

[0003] Traditional solvent recovery towers typically use monolithic packing, requiring the tower to be shut down and disassembled for maintenance. This process is not only complex and time-consuming but also prone to solvent vapor leakage, threatening explosion-proof safety. While some improved equipment attempts modular packing designs, they lack precise alignment and connection mechanisms. When a single packing module is rotated to the maintenance position, it requires manual calibration and fixation, which is cumbersome and can easily affect subsequent sealing performance due to positioning deviations. Therefore, we disclose an explosion-proof solvent recovery tower for water-based paint production to meet people's needs. Utility Model Content

[0004] The purpose of this application is to provide an explosion-proof solvent recovery tower for water-based paint production to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: an explosion-proof solvent recovery tower for water-based paint production, comprising a solvent recovery tower body, a reflux condensation mechanism installed on the outer side of the solvent recovery tower body, a heating mechanism installed at the bottom of the solvent recovery tower body, and a pressure relief valve installed on the outer side of the solvent recovery tower body.

[0006] An annular groove is formed on the inner side wall of the solvent recovery tower body. A rotating ring is rotatably installed in the annular groove. Multiple sector-shaped boxes are slidably installed on the top of the rotating ring. The multiple sector-shaped boxes form a circle with the same cross-sectional size as the solvent recovery tower body. Packing material is provided in each of the multiple sector-shaped boxes.

[0007] Each of the multiple fan-shaped boxes has an arc-shaped groove on its side near the solvent recovery tower body, and each of the multiple arc-shaped grooves has a pull groove on its bottom inner wall, and each of the multiple pull grooves has a pull rod fixedly installed on its bottom inner wall.

[0008] An arc-shaped sealing plate is detachably installed on the outer side of the solvent recovery tower body. A fixing mechanism for connecting the pull rod is installed on the arc-shaped sealing plate. A rotating mechanism is installed on the inner side wall of the solvent recovery tower body. The rotating mechanism is installed in conjunction with the rotating ring and the fixing mechanism.

[0009] Preferably, the fixing mechanism includes a fixing hole opened at the top of the arc-shaped sealing plate, a locking rod slidably installed in the fixing hole, a pull block fixedly installed at the top of the locking rod, a spring sleeved on the locking rod, and the two ends of the spring respectively fixedly installed on the sides of the pull block and the arc-shaped sealing plate that are close to each other. An avoidance hole is opened on one side inner wall of the fixing hole, a positioning rod is fixedly installed on the side of the locking rod, one end of the positioning rod passes through the avoidance hole and contacts the inner wall of the arc-shaped groove, and a pull hole is opened at the top of the positioning rod, one of the pull rods extending into the pull hole.

[0010] Preferably, the rotating mechanism includes a rotating hole formed on the inner side wall of the solvent recovery tower body, a rotating shaft rotatably installed in the rotating hole, one end of the rotating shaft extending into the solvent recovery tower body and fixedly installed with an end face gear, a plurality of meshing teeth arranged in a ring fixedly installed at the bottom of the rotating ring, the plurality of meshing teeth cooperating with the end face gear, the other end of the rotating shaft extending out of the rotating hole and having a plurality of grooves, and the bottom end of the clamping rod extending into one of the grooves.

[0011] Preferably, the heating mechanism includes a heating chamber located at the bottom of the solvent recovery tower body, and a heater is installed inside the heating chamber.

[0012] Preferably, the reflux condensation mechanism includes a recovery tank and a condenser fixedly installed on the outside of the solvent recovery tower body. The inlet end of the condenser is connected to the top of the solvent recovery tower body, and the outlet end of the condenser is connected to the recovery tank. Multiple nozzles are provided inside the solvent recovery tower body.

[0013] Preferably, two T-shaped blocks are fixedly installed on the top of the rotating ring, and two T-shaped grooves are opened at the bottom of the fan-shaped box. The two T-shaped blocks are slidably installed in the two T-shaped grooves respectively, and multiple evenly arranged ventilation holes are opened on the bottom side wall of the fan-shaped box.

[0014] Preferably, an inlet pipe is installed on one side of the solvent recovery tower body.

[0015] Preferably, a maintenance hole communicating with the annular groove is provided on the inner side wall of the solvent recovery tower body, and the maintenance hole corresponds to the position of one of the fan-shaped boxes and the arc-shaped sealing plate.

[0016] In summary, the technical effects and advantages of this utility model are as follows:

[0017] This application uses multiple sector-shaped boxes to form a circular packing layer. With the help of a rotating ring, a rotating mechanism and a fixing mechanism, the sector-shaped boxes are automatically connected to the arc-shaped sealing plate when they are rotated to the maintenance hole position. This facilitates the removal and maintenance of each box individually, simplifies the operation process, shortens the maintenance time, reduces the risk of solvent vapor leakage, ensures production continuity and explosion-proof safety, and at the same time ensures the integrity and mass transfer efficiency of the packing layer. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional view of the solvent recovery tower body of this utility model after being cut open;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 A first-person perspective perspective view showing the connection between the rotating ring, the rotating mechanism, the fixing mechanism, and the T-block;

[0022] Figure 4 A three-dimensional view showing the connection between the arc-shaped sealing plate and the fixing mechanism;

[0023] Figure 5 A second-view perspective perspective view showing the connection between the rotating ring, the rotating mechanism, the fixing mechanism, and the T-block;

[0024] Figure 6 This is a perspective view of the present invention.

[0025] In the diagram: 1. Solvent recovery tower body; 2. Nozzle; 3. Heater; 4. Inlet pipe; 5. Pressure relief valve; 6. Annular groove; 7. Rotating ring; 8. Sector box; 9. Pull rod; 10. Arc groove; 11. Maintenance hole; 12. Arc sealing plate; 13. Rotating shaft; 14. Rotating hole; 15. End face gear; 16. Groove; 17. Pull groove; 18. Locking rod; 19. Meshing teeth; 20. Positioning rod; 21. Pull hole; 22. Pull block; 23. Spring; 24. Recovery tank; 25. Condenser; 26. Packing; 27. T-block; 28. T-groove. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1 - Figure 6 The embodiments provided by this utility model are as follows:

[0028] An explosion-proof solvent recovery tower for water-based paint production includes a solvent recovery tower body 1, and a reflux condensation mechanism is installed on the outer side of the solvent recovery tower body 1.

[0029] like Figure 5 As shown, the reflux condensation mechanism includes a recovery tank 24 and a condenser 25 fixedly installed on the outside of the solvent recovery tower body 1. The air inlet of the condenser 25 is connected to the top of the solvent recovery tower body 1 through a first pipe, and the air outlet of the condenser 25 is connected to the recovery tank 24 through a second pipe. A pump can be installed in the recovery tank 24. The condensate in the recovery tank 24 is divided into two parts. One part is recovered by the pump and recycled to the water-based paint production process. The other part is used as reflux liquid and is pumped into the nozzle 2 and sprayed out through the nozzle 2. Multiple nozzles 2 are provided inside the solvent recovery tower body 1.

[0030] A heating mechanism is installed at the bottom of the solvent recovery tower body 1;

[0031] like Figure 1 As shown, the heating mechanism includes a heating chamber located at the bottom of the solvent recovery tower body 1, and a heater 3 is installed inside the heating chamber. The heater 3 is used to heat the water-based paint mixture.

[0032] A pressure relief valve 5 is installed on the outer side of the solvent recovery tower body 1; the pressure relief valve 5 is used to release pressure when the pressure exceeds the threshold to prevent explosion.

[0033] An annular groove 6 is provided on the inner side wall of the solvent recovery tower body 1. A rotating ring 7 is rotatably installed in the annular groove 6. Multiple sector boxes 8 are slidably installed on the top of the rotating ring 7. The multiple sector boxes 8 form a circle with the same size as the cross-section of the solvent recovery tower body 1. Packing material 26 is provided in each of the multiple sector boxes 8.

[0034] Multiple fan-shaped boxes 8 are provided with arc-shaped grooves 10 on the side near the solvent recovery tower body 1, and multiple arc-shaped grooves 10 are provided with pull grooves 17 on the bottom inner wall of the multiple arc-shaped grooves 10, and multiple pull rods 9 are fixedly installed on the bottom inner wall of the multiple pull grooves 17.

[0035] An arc-shaped sealing plate 12 is detachably installed on the outer side of the solvent recovery tower body 1, and a fixing mechanism for connecting the pull rod 9 is installed on the arc-shaped sealing plate 12.

[0036] like Figure 3 and Figure 4 As shown, the fixing mechanism includes a fixing hole opened at the top of the arc-shaped sealing plate 12. A locking rod 18 is slidably installed in the fixing hole. A pull block 22 is fixedly installed at the top of the locking rod 18. A spring 23 is sleeved on the locking rod 18. The two ends of the spring 23 are respectively fixedly installed on the sides of the pull block 22 and the arc-shaped sealing plate 12 that are close to each other. An avoidance hole is opened on one side of the inner wall of the fixing hole. A positioning rod 20 is fixedly installed on the side of the locking rod 18. One end of the positioning rod 20 passes through the avoidance hole and contacts the inner wall of the arc-shaped groove 10. A pull hole 21 is opened at the top of the positioning rod 20. One of the pull rods 9 extends into the pull hole 21. The rotation of the rotating ring 7 causes the pull groove 17 on the other sector boxes 8 to slowly align with the positioning rod 20. When the pull groove 17 aligns with the positioning rod 20, the spring 23 returns to its original state, causing the locking rod 18 to move downward and insert into one of the grooves 16. At the same time, the locking rod 18 drives the positioning rod 20 to move downward, and the pull rod 9 is inserted into the pull hole 21, thus completing the connection between another sector box 8 and the arc-shaped sealing plate 12. At this point, the sector box 8 can be removed. Multiple sector boxes 8 can be removed in sequence by inserting them in this way. After all the replacements are completed, the sector boxes 8 can be removed.

[0037] A rotating mechanism is installed on the inner wall of the solvent recovery tower body 1. The rotating mechanism is installed in conjunction with the rotating ring 7 and the fixing mechanism.

[0038] like Figure 2 and Figure 3 As shown, the rotating mechanism includes a rotating hole 14 on the inner wall of the solvent recovery tower body 1. A rotating shaft 13 is rotatably installed in the rotating hole 14. One end of the rotating shaft 13 extends into the solvent recovery tower body 1 and is fixedly mounted with an end face gear 15. Multiple meshing teeth 19 arranged in a ring are fixedly mounted on the bottom of the rotating ring 7. The multiple meshing teeth 19 are engaged with the end face gear 15. The other end of the rotating shaft 13 extends out of the rotating hole 14 and is provided with multiple grooves 16. The bottom end of the locking rod 18 extends into one of the grooves 16. Rotating the rotating shaft 13 causes the end face gear 15 to rotate. The rotation of the end face gear 15, in conjunction with the meshing teeth 19, drives the rotating ring 7 to rotate. The rotation of the rotating ring 7 causes the other sector boxes 8 to rotate, thereby allowing different sector boxes 8 to be switched for maintenance.

[0039] like Figure 3As shown, two T-shaped blocks 27 are fixedly installed on the top of the rotating ring 7, and two T-shaped grooves 28 are opened at the bottom of the sector box 8. The two T-shaped blocks 27 are slidably installed in the two T-shaped grooves 28 respectively. Multiple evenly arranged vent holes are opened on the bottom side wall of the sector box 8, allowing liquid and vapor to pass freely. The arrangement of the T-shaped blocks 27 and T-shaped grooves 28 facilitates the guiding and limiting of the sector box 8 during installation. After installation, the outer part of the sector box 8 contacts the inner side wall of the solvent recovery tower body 1, and the side of the T-shaped blocks 27 contacts the inner wall of the T-shaped grooves 28. Thus, the sector box 8 can be limited without affecting its rotation.

[0040] like Figure 1 As shown, an inlet pipe 4 is installed on one side of the solvent recovery tower body 1. A water-based paint mixture containing organic solvents can enter through the inlet pipe 4.

[0041] like Figure 1 and Figure 2 As shown, a maintenance hole 11 communicating with the annular groove 6 is provided on the inner wall of the solvent recovery tower body 1. The maintenance hole 11 corresponds to the position of one of the sector boxes 8 and the arc-shaped sealing plate 12. The maintenance hole 11 is provided to facilitate the removal of the sector box 8 later, and the arc-shaped sealing plate 12 is provided to seal the maintenance hole 11.

[0042] Working principle:

[0043] In use, the water-based paint mixture containing organic solvents can be introduced through the inlet pipe 4. Then, the heater 3 is started to heat the mixture. The low-boiling-point organic solvents first vaporize and rise, and then undergo multiple heat and mass exchanges with the reflux liquid sprayed by the nozzle 2 in the tower to further separate impurities. The high-purity solvent vapors enter the condenser 25 from the top of the solvent recovery tower body 1, are cooled into liquid and recovered into the recovery tank 24. The condensate in the recovery tank 24 is divided into two parts. One part is recovered by pump to the water-based paint production process for recycling, and the other part is used as reflux liquid and is pumped into the nozzle 2 and sprayed out through the nozzle 2.

[0044] By setting the packing 26, it is easy for the rising solvent vapor to come into contact with the reflux liquid. When the packing 26 needs to be maintained, the arc-shaped sealing plate 12 is removed, and then the pull rod 9 connected to the pull hole 21 on the arc-shaped sealing plate 12 can be taken out, thereby taking out the corresponding sector box 8, and then replacing it.

[0045] After replacement, the sector box 8 is placed in, and then the arc-shaped sealing plate 12 is installed. The arc-shaped sealing plate 12 is connected to the outer side of the solvent recovery tower body 1 by multiple bolts. When replacing, only two bolts need to be installed, and it is not necessary to install all of them. After all the bolts are replaced, all the bolts are installed. Then, pull the pull block 22 to stretch the spring 23. The pull block 22 moves and drives the locking rod 18 out of the groove 16. At the same time, the locking rod 18 moves and drives the positioning rod 20 into the arc-shaped groove 10. The pull rod 9 separates from the pull hole 21. The setting of multiple grooves 16 facilitates the rotation of the rotating shaft 13.

[0046] Rotating the shaft 13 causes the end face gear 15 to rotate. The rotation of the end face gear 15, in conjunction with the meshing gear 19, drives the rotating ring 7 to rotate. The rotation of the rotating ring 7 causes the pull groove 17 on the other sector boxes 8 to slowly align with the positioning rod 20. When the pull groove 17 aligns with the positioning rod 20, the spring 23 returns to its original state, causing the locking rod 18 to move downward. The locking rod 18 inserts into one of the grooves 16, and at the same time, the locking rod 18 drives the positioning rod 20 to move downward. The pull rod 9 inserts into the pull hole 21, thus completing the connection between another sector box 8 and the arc-shaped sealing plate 12. At this point, the sector box 8 can be removed. Multiple sector boxes 8 can be removed in sequence by inserting them in this way. After all have been replaced, the arc-shaped sealing plate 12 can be installed on the outer side of the solvent recovery tower body 1.

[0047] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An explosion-proof solvent recovery tower for water-based paint production, characterized in that: The solvent recovery tower body (1) is equipped with a reflux condensation mechanism on its outer side, a heating mechanism on its bottom, and a pressure relief valve (5) on its outer side. An annular groove (6) is provided on the inner side wall of the solvent recovery tower body (1). A rotating ring (7) is rotatably installed in the annular groove (6). Multiple fan-shaped boxes (8) are slidably installed on the top of the rotating ring (7). The multiple fan-shaped boxes (8) form a circle with the same cross-sectional size as the solvent recovery tower body (1). Each of the multiple fan-shaped boxes (8) is filled with packing material (26). Each of the fan-shaped boxes (8) has an arc-shaped groove (10) on its side near the solvent recovery tower body (1). Each of the arc-shaped grooves (10) has a pull groove (17) on its bottom inner wall. Each of the pull grooves (17) has a pull rod (9) fixedly installed on its bottom inner wall. An arc-shaped sealing plate (12) is detachably installed on the outer side of the solvent recovery tower body (1). A fixing mechanism for connecting the pull rod (9) is installed on the arc-shaped sealing plate (12). A rotating mechanism is installed on the inner side wall of the solvent recovery tower body (1). The rotating mechanism is installed in conjunction with the rotating ring (7) and the fixing mechanism.

2. The explosion-proof solvent recovery tower for water-based paint production according to claim 1, characterized in that: The fixing mechanism includes a fixing hole opened at the top of the arc-shaped sealing plate (12), a locking rod (18) is slidably installed in the fixing hole, a pull block (22) is fixedly installed at the top of the locking rod (18), a spring (23) is sleeved on the locking rod (18), and the two ends of the spring (23) are respectively fixedly installed on the sides of the pull block (22) and the arc-shaped sealing plate (12) that are close to each other. A clearance hole is opened on one side of the inner wall of the fixing hole, a positioning rod (20) is fixedly installed on the side of the locking rod (18), one end of the positioning rod (20) passes through the clearance hole and contacts the inner wall of the arc-shaped groove (10), and a pull hole (21) is opened at the top of the positioning rod (20), one of the pulling rods (9) extends into the pull hole (21).

3. The explosion-proof solvent recovery tower for water-based paint production according to claim 2, characterized in that: The rotating mechanism includes a rotating hole (14) on the inner wall of the solvent recovery tower body (1). A rotating shaft (13) is rotatably installed in the rotating hole (14). One end of the rotating shaft (13) extends into the solvent recovery tower body (1) and is fixedly installed with an end face gear (15). Multiple meshing teeth (19) arranged in a ring are fixedly installed at the bottom of the rotating ring (7). The multiple meshing teeth (19) are installed in cooperation with the end face gear (15). The other end of the rotating shaft (13) extends out of the rotating hole (14) and is provided with multiple grooves (16). The bottom end of the clamping rod (18) extends into one of the grooves (16).

4. The explosion-proof solvent recovery tower for water-based paint production according to claim 1, characterized in that: The heating mechanism includes a heating chamber located at the bottom of the solvent recovery tower body (1), and a heater (3) is installed in the heating chamber.

5. The explosion-proof solvent recovery tower for water-based paint production according to claim 1, characterized in that: The reflux condensation mechanism includes a recovery tank (24) and a condenser (25) fixedly installed on the outside of the solvent recovery tower body (1). The air inlet of the condenser (25) is connected to the top of the solvent recovery tower body (1), and the air outlet of the condenser (25) is connected to the recovery tank (24). Multiple nozzles (2) are provided inside the solvent recovery tower body (1).

6. The explosion-proof solvent recovery tower for water-based paint production according to claim 1, characterized in that: Two T-shaped blocks (27) are fixedly installed on the top of the rotating ring (7), and two T-shaped grooves (28) are opened at the bottom of the fan-shaped box (8). The two T-shaped blocks (27) are slidably installed in the two T-shaped grooves (28), and multiple evenly arranged ventilation holes are opened on the bottom side wall of the fan-shaped box (8).

7. The explosion-proof solvent recovery tower for water-based paint production according to claim 1, characterized in that: A liquid inlet pipe (4) is installed on one side of the solvent recovery tower body (1).

8. The explosion-proof solvent recovery tower for water-based paint production according to claim 1, characterized in that: The inner wall of the solvent recovery tower body (1) is provided with a maintenance hole (11) that communicates with the annular groove (6). The maintenance hole (11) corresponds to the position of one of the fan-shaped boxes (8) and the arc-shaped sealing plate (12).

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