Heat exchange device for formaldehyde production

Abstract

The utility model belongs to the technical field of formaldehyde production, and particularly relates to a heat exchange device for formaldehyde production, which comprises a heat exchange box, and the right side of the heat exchange box is communicated and fixed with a connecting pipe. The motor is started to drive the incomplete tooth to rotate through the rotating rod, the incomplete tooth drives the rack to move rightwards, the rack drives the inverted rod to move through the connecting plate, and the connecting plate drives the connecting rod to slide on the positioning rod and stretch the spring, so that the inverted rod is inserted into meshes of the filter screen, and residues blocked in the meshes are poured out; when the incomplete teeth rotate to be not meshed with the rack, the spring in the stretching state is reset, the spring drives the connecting plate to move through the connecting rod, the connecting plate drives the inverted rod to move leftwards, and therefore the inverted rod can move in a reciprocating mode to clean meshes in the filter screen; therefore, the filter screen can be taken down for cleaning without shutdown, the efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of formaldehyde production technology, specifically a heat exchange device for formaldehyde production. Background Technology

[0002] In the process of producing formaldehyde in a chemical plant, the first step is to transport methanol, water vapor and air into the evaporator. In the Northeast region, where the winter temperature is low, if the cold air is directly transported into the evaporator for evaporation, it will affect the evaporation effect and reduce the evaporation efficiency.

[0003] Chinese patented invention CN220039238U discloses a high-efficiency heat exchange device for formaldehyde production, including a heat exchange box, heat exchange tubes, and a filtration mechanism. The heat exchange box is equipped with a flue gas inlet, an air inlet, a flue gas outlet, and an air outlet pipe. The heat exchange tubes are installed inside the heat exchange box. The filtration mechanism includes a connecting pipe, a filter element, a driving element, a vertical plate, a cam, a supporting plate, a spring, and a supporting rod. The connecting pipe is connected to the flue gas inlet and is provided with a sliding groove and a through hole. The filter element is slidably connected to the sliding groove and is provided with a groove. The driving element is fixedly connected to the connecting pipe. The output end of the driving element passes through the vertical plate and is fixedly connected to the cam. One end of the supporting rod is fixedly connected to the supporting plate, and the other end of the supporting rod passes through the through hole and is inserted into the groove. The cam contacts the supporting plate. In this way, the flue gas entering the heat exchange box can be filtered to prevent blockage of the heat exchange box and the filter element can be easily replaced.

[0004] However, the device still has some problems. In actual use, the device can effectively intercept large particulate impurities in the flue gas, such as dust and particulate matter, through the filter screen. However, as the operating time increases, fine particles and sticky substances in the flue gas will gradually accumulate on the mesh, causing the filter screen to become clogged. Once the filter screen is severely clogged, it is necessary to stop the machine and remove the filter screen for cleaning. This process is not only time-consuming and labor-intensive, increasing operating costs, but may also affect the production schedule due to downtime, causing economic losses. Therefore, we propose a heat exchange device for formaldehyde production to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a heat exchange device for formaldehyde production, which solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A heat exchange device for formaldehyde production includes a heat exchange box. A connecting pipe is connected and fixed to the right side of the heat exchange box. Two rectangular blocks are fixedly connected to the inner walls of both sides of the connecting pipe. A positioning rod is welded to one side of each rectangular block, and a connecting rod is slidably connected to the positioning rod. A spring is welded between the end of the connecting rod and one side of the corresponding rectangular block. The other ends of the four connecting rods are fixedly connected to the same connecting plate. Multiple inverted rods are welded to one side of the connecting plate, and a rack is fixedly connected to the other side of the connecting plate. A rotating rod is rotatably connected to the inner wall of the front side of the connecting pipe. An incomplete tooth is fixedly connected to the end of the rotating rod, and the incomplete tooth meshes with the rack. A motor is fixedly connected to the front side of the connecting pipe. The front end of the rotating rod extends outside the connecting pipe and is fixedly connected to the output shaft of the motor. A U-shaped groove with one open side is opened on the connecting pipe, and a filter screen is movably contacted on the U-shaped groove. A drop hole is opened on the inner wall of the bottom of the connecting pipe, and a collection box with an open top is provided at the bottom of the connecting pipe.

[0010] Furthermore, the spring is movably sleeved on the corresponding positioning rod.

[0011] Furthermore, a sealing plate is fixedly connected to the front side of the filter screen, and the sealing plate is threadedly connected to the connecting pipe by four first bolts.

[0012] Furthermore, mounting blocks are welded to both sides of the collection box, and the mounting blocks are threadedly connected to the connecting pipe by a second bolt.

[0013] Furthermore, the heat exchange box has an air inlet on the right side and a flue gas outlet and an exhaust pipe on the left side.

[0014] Furthermore, the heat exchange box is equipped with heat exchange tubes, and a support plate is fixedly connected inside the heat exchange box, with the support plate being fixedly connected to the heat exchange tubes.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a heat exchange device for formaldehyde production, which has the following beneficial effects:

[0017] This invention utilizes a motor to rotate a rotating rod, which in turn drives a partially rotating gear. This partially rotating gear moves a rack to the right, and the rack, via a connecting plate, moves a reciprocating rod. The connecting plate then causes the reciprocating rod to slide on a positioning rod, stretching a spring. This allows the reciprocating rod to insert into the mesh of the filter screen, emptying the debris blocking the mesh. The debris falls through a drop hole into a collection box for collection. When the partially rotating gear no longer engages with the rack, the stretched spring returns to its original position. The spring, via the connecting rod, moves the connecting plate, which in turn moves the reciprocating rod to the left. This reciprocating motion of the reciprocating rod cleans the mesh of the filter screen, eliminating the need to stop the machine and remove the filter screen for cleaning. This improves efficiency and reduces costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the heat exchange box of this utility model after it has been concealed.

[0020] Figure 3 This utility model Figure 2 A schematic diagram of the tilted three-dimensional structure;

[0021] Figure 4 This is a three-dimensional structural diagram of the cut-open connecting pipe of this utility model.

[0022] In the diagram: 1. Heat exchanger box; 2. Connecting pipe; 3. Rectangular block; 4. Positioning rod; 5. Connecting rod; 6. Spring; 7. Connecting plate; 8. Reverse rod; 9. Rack; 10. Rotating rod; 11. Incomplete tooth; 12. Motor; 13. U-shaped groove; 14. Filter screen; 15. Drop hole; 16. Collection box; 17. Sealing plate; 18. First bolt; 19. Mounting block; 20. Second bolt; 21. Air inlet; 22. Flue gas outlet; 23. Exhaust pipe; 24. Heat exchanger tube; 25. Support plate. Detailed Implementation

[0023] 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.

[0024] Example

[0025] like Figure 1-4As shown, an embodiment of this utility model discloses a heat exchange device for formaldehyde production, including a heat exchange box 1. A connecting pipe 2 is connected and fixed to the right side of the heat exchange box 1. Two rectangular blocks 3 are fixedly connected to the inner walls of both sides of the connecting pipe 2. A positioning rod 4 is welded to one side of the rectangular block 3. A connecting rod 5 is slidably connected to the positioning rod 4. A spring 6 is welded between the end of the connecting rod 5 and the corresponding side of the rectangular block 3. The other ends of the four connecting rods 5 are fixedly connected to the same connecting plate 7. Multiple inverted rods 8 are welded to one side of the connecting plate 7. A rack 9 is fixedly connected to the other side of the connecting plate 7. A rotating rod 10 is rotatably connected to the inner wall of the front side of the connecting pipe 2. An incomplete tooth 11 is fixedly connected to the end of the rotating rod 10. The incomplete tooth 11 meshes with the rack 9. A motor 12 is fixedly connected to the front side of the connecting pipe 2. The front end of the rotating rod 10 extends to the outside of the connecting pipe 2 and is fixedly connected to the output shaft of the motor 12. A U-shaped groove 13 with one side open is opened on the connecting pipe 2. A filter screen 14 is movably contacted on the U-shaped groove 13. A drop hole 15 is provided on the inner wall of the bottom of the pipe 2. A collection box 16 with an open top is provided at the bottom of the connecting pipe 2. When the motor 12 is started, the motor 12 drives the incomplete gear 11 to rotate through the rotating rod 10. The incomplete gear 11 drives the rack 9 to move to the right. The rack 9 drives the falling rod 8 to move through the connecting plate 7. At the same time, the connecting plate 7 drives the connecting rod 5 to slide on the corresponding positioning rod 4. During the movement, the connecting rod 5 stretches the corresponding spring 6, so that the falling rod 8 is inserted into the mesh of the filter screen 14. The residue stuck in the mesh is poured out and falls into the collection box 16 through the drop hole 15 for collection. When the incomplete tooth 11 rotates to the point where it is no longer engaged with the rack 9, the spring 6, which is in a stretched state, returns to its original position. Under the action of the spring 6's own elastic force, the spring 6 drives the connecting plate 7 to move through the connecting rod 5. The connecting plate 7 drives the reversing rod 8 to move to the left, so that the reversing rod 8 can reciprocate to clean the mesh on the filter screen 14. This eliminates the need to stop the machine to remove the filter screen 14 for cleaning, thereby improving efficiency and reducing costs.

[0026] In some embodiments, the spring 6 is movably sleeved on the corresponding positioning rod 4.

[0027] In some embodiments, a sealing plate 17 is fixedly connected to the front side of the filter screen 14. The sealing plate 17 is threadedly connected to the connecting pipe 2 by four first bolts 18. The sealing plate 17 serves to seal the filter screen.

[0028] In some embodiments, mounting blocks 19 are welded to both sides of the collection box 16, and the mounting blocks 19 are threadedly connected to the connecting pipe 2 by a second bolt 20.

[0029] In some embodiments, the heat exchange box 1 is provided with an air inlet 21 on the right side and a flue gas outlet 22 and an exhaust pipe 23 on the left side.

[0030] In some embodiments, a heat exchange tube 24 is provided inside the heat exchange box 1, and a support plate 25 is fixedly connected inside the heat exchange box 1. The support plate 25 is fixedly connected to the heat exchange tube 24, and the support plate 25 serves as a support.

[0031] Working principle or structural principle: When the filter screen 14 becomes clogged after prolonged use, the motor 12 is started. The motor 12 drives the incomplete gear 11 to rotate via the rotating rod 10. The incomplete gear 11 drives the rack 9 to move to the right. The rack 9 drives the reversing rod 8 to move via the connecting plate 7. At the same time, the connecting plate 7 drives the connecting rod 5 to slide on the corresponding positioning rod 4. During the movement, the connecting rod 5 stretches the corresponding spring 6, causing the reversing rod 8 to insert into the mesh of the filter screen 14, pouring out the residue clogged in the mesh. The residue falls into the collection box 16 through the drop hole 15 for collection. When the incomplete gear 11 rotates to the point where it is no longer engaged with the rack 9, it is in a stretched state. Spring 6 returns to its original position. Under the action of its own elastic force, spring 6 drives connecting plate 7 to move via connecting rod 5. Connecting plate 7 drives reciprocating rod 8 to move to the left, so that reciprocating rod 8 can clean the mesh on filter screen 14. This eliminates the need to stop the machine to remove filter screen 14 for cleaning, improving efficiency and reducing costs. When filter screen 14 needs to be replaced, the first bolt 18 is removed, separating sealing plate 17 from connecting pipe 2. Then, sealing plate 17 is moved, causing filter screen 14 to separate from connecting pipe 2 and be removed. The second bolt 20 can also be rotated to separate mounting block 19 from connecting pipe 2, allowing collection box 16 to be removed for cleaning.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A heat exchange device for formaldehyde production, comprising a heat exchange box (1), characterized in that: The right side of the heat exchange box (1) is communicated and fixed with a connecting pipe (2), two rectangular blocks (3) are fixed on the inner walls of the two sides of the connecting pipe (2), a positioning rod (4) is welded on one side of the rectangular block (3), a connecting rod (5) is slidably connected on the positioning rod (4), a spring (6) is welded between the end of the connecting rod (5) and the corresponding side of the rectangular block (3), the other end of the four connecting rods (5) is fixedly connected with the same connecting plate (7), a plurality of inverted rods (8) are welded on one side of the connecting plate (7), a rack (9) is fixedly connected on the other side of the connecting plate (7), a rotating rod (10) is rotatably connected on the front inner wall of the connecting pipe (2), an incomplete tooth (11) is fixedly connected on the end of the rotating rod (10), the incomplete tooth (11) is engaged with the rack (9), a motor (12) is fixedly connected on the front side of the connecting pipe (2), the front end of the rotating rod (10) extends out of the connecting pipe (2) and is fixedly connected with the output shaft of the motor (12), a backshaped groove (13) with one side being open is formed in the connecting pipe (2), a filter screen (14) is movably contacted on the backshaped groove (13), a falling hole (15) is formed in the bottom inner wall of the connecting pipe (2), and a collecting box (16) with the top being open is arranged on the bottom of the connecting pipe (2).

2. The heat exchange device for formaldehyde production according to claim 1, characterized in that: The spring (6) movably sleeves the corresponding positioning rod (4).

3. The heat exchange device for formaldehyde production according to claim 1, characterized in that: The front side of the filter screen (14) is fixedly connected with a sealing plate (17), and the sealing plate (17) is threadedly connected with the connecting pipe (2) through four first bolts (18).

4. The heat exchange device for formaldehyde production according to claim 1, characterized in that: The two sides of the collecting box (16) are welded with mounting blocks (19), and the mounting blocks (19) are threadedly connected with the connecting pipe (2) through second bolts (20).

5. The heat exchange device for formaldehyde production according to claim 1, characterized in that: The right side of the heat exchange box (1) is provided with an air inlet (21), and the left side of the heat exchange box (1) is provided with a flue gas outlet (22) and an air outlet pipe (23).

6. The heat exchange device for formaldehyde production according to claim 5, characterized in that: The heat exchange box (1) is provided with a heat exchange pipe (24), and a supporting plate (25) is fixedly connected in the heat exchange box (1). The supporting plate (25) is fixedly connected with the heat exchange pipe (24).

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