Purification device for formaldehyde production

Abstract

The utility model discloses a purification device for formaldehyde production, which comprises a purification box, a box cover, an air inlet pipe, an air outlet pipe, a filter screen, a porous rubber plate, a heating frame, a dust collection mechanism and a fixed connection mechanism, the top of the side wall of the purification box is provided with an embedding slot, the fixed connection mechanism is arranged on the side wall of the purification box, and the lower surface of the box cover is provided with an embedding plate. An embedding and inserting hole is formed in the embedding and inserting plate, the embedding and inserting plate is embedded and inserted in the embedding and inserting hole, the fixed connecting mechanism and the embedding and inserting hole are correspondingly arranged, the air inlet pipe and the air outlet pipe are arranged on the two side walls of the purifying box correspondingly, a mounting groove is formed in the top of the side wall of the purifying box, and protruding mounting plates are arranged on the two sides of the upper end of the filter screen, the porous rubber plate and the heating frame correspondingly. The utility model relates to the technical field of formaldehyde production equipment, and particularly provides a purification device for formaldehyde production, which adopts negative pressure adsorption to replace scraper cleaning to clean a filter screen and prevents dust or particulate matters from penetrating through the filter screen to enter one side close to a porous rubber plate when a scraper applies force.

Description

Technical Field

[0001] This utility model relates to the technical field of formaldehyde production equipment, specifically a purification device for formaldehyde production. Background Technology

[0002] Formaldehyde is the simplest aldehyde in the aliphatic series, and it is chemically very reactive, capable of synthesizing a variety of compounds. It is one of the important basic chemical raw materials, widely used in chemical, pharmaceutical, dye, and agricultural fields. It is mostly used as a raw material for urea-formaldehyde resin, phenol-formaldehyde resin, and amino resin, and secondarily for the production of polyoxymethylene, trimethylolpropane, pentaerythritol, hexamethylenetetramine, pyridine, and isoprene, among other chemical products. Formaldehyde can also be used in the synthesis of fragrances, explosives, chelating agents, synthetic auxiliaries, and important intermediates.

[0003] The crude methanol used in formaldehyde production contains many impurities. In actual production, methanol pretreatment is necessary to increase its purity and produce higher-purity formaldehyde. Utility model patent application CN202223150577.X provides a purification device for methanol-to-formaldehyde production. This device uses a detachable cover to connect with the purification chamber, allowing for easy disassembly and cleaning of the filter structure. However, when cleaning the filter screen with a scraper, some dust or particles adsorbed by the filter screen can penetrate the mesh and enter the side of the filter screen near the porous rubber plate, thus affecting the methanol purification effect. Utility Model Content

[0004] In view of the above situation and to overcome the existing defects, this utility model provides a formaldehyde production purification device that uses negative pressure adsorption to replace scraper cleaning for cleaning the filter screen, thereby preventing dust or particles from passing through the filter screen and entering the side near the porous adhesive plate when the scraper applies force.

[0005] This utility model provides the following technical solution: A purification device for formaldehyde production, comprising a purification box, a box lid, an inlet pipe, an outlet pipe, a filter screen, a porous rubber sheet, a heating frame, a dust collection mechanism, and a fixing connection mechanism. The top of the side wall of the purification box has a slot. The fixing connection mechanism is located on the side wall of the purification box. The lower surface of the box lid has an insert plate with insert holes. The insert plate is inserted into the slot. The fixing connection mechanism is correspondingly arranged with the insert holes. The inlet pipe and outlet pipe are respectively located on the two side walls of the purification box. The top of the side wall of the purification box... The system is equipped with mounting grooves. Raised mounting plates are provided on both sides of the upper end of the filter, porous rubber sheet, and heating frame. The filter, porous rubber sheet, and heating frame are respectively installed in the mounting grooves via corresponding raised mounting plates. The bottom and side walls of the filter, porous rubber sheet, and heating frame are all in contact with the bottom and side walls of the purification chamber. The filter is positioned near the air inlet pipe, and the heating frame is positioned near the air outlet pipe. The porous rubber sheet is located between the filter and the heating frame. A heating wire is installed inside the heating frame. The dust collection mechanism is located on the chamber cover, corresponding to the filter and positioned on the side of the filter closest to the air inlet.

[0006] To connect the lid to the purification chamber, the fixing mechanism includes a fixing bolt, a support plate, a fixing slide rod, a fixing spring, and a handle. A fixing groove is formed on the side wall of the purification chamber, perpendicular to and communicating with the insertion slot. The fixing bolt is slidably disposed within the fixing groove. A limiting plate is provided on the fixing bolt, with one end of the limiting plate near the fixing bolt. Two sets of fixing holes are formed on the fixing bolt, located on opposite sides of the limiting plate. These two sets of fixing holes are respectively fixing hole one and fixing hole two. One end of the fixing bolt is adapted to the insertion hole. The support plate is fixedly disposed on the outer wall of the purification chamber. The fixing slide rod is slidably disposed on the support plate, with a limiting plate two on the fixing slide rod. The handle is located at one end of the fixing slide rod, and the other end of the fixing slide rod is adapted to the two sets of fixing holes. The fixing spring is sleeved on the fixing slide rod, with both ends connected to the support plate and the limiting plate two, respectively.

[0007] Furthermore, two sets of the fixed connection mechanism are symmetrically arranged on both sides of the purification box, and two sets of the insert plate and the lower surface of the box cover are arranged, with the two sets of insert plates respectively corresponding to the two sets of fixed connection mechanisms.

[0008] To achieve filter adsorption and cleaning, the dust collection mechanism includes a dust collection box, a dust pump, a height adjustment motor, a height adjustment screw, a guide slide, and a threaded plate. The height adjustment motor is fixedly mounted on the upper surface of the box cover. The height adjustment screw is rotatably mounted on the box cover and connected to the output shaft of the height adjustment motor. The guide slide is located on the lower surface of the box cover and is parallel to the height adjustment screw. One end of the threaded plate is connected to the height adjustment screw via threads, and the other end of the threaded plate slides on the guide slide. A suction head is provided on the textured plate, and the suction head is positioned close to the filter screen. The dust collection box is fixedly mounted on the upper surface of the box cover. A sealing door is hinged to the front side of the dust collection box. The suction pump is fixedly mounted on the side wall of the dust collection box. A suction pipe is connected between the side wall of the dust collection box and the suction pump. A dust filter screen is provided at the position where the suction pipe is connected to the side wall of the dust collection box. A second suction pipe is provided on the top wall of the dust collection box. The second suction pipe passes through the box cover. An elastic telescopic tube is connected to the lower end of the second suction pipe. The elastic telescopic tube passes through the threaded plate and is connected to the suction head.

[0009] Preferably, both the air inlet pipe and the air outlet pipe are connected to multiple branch pipes, which are connected to the side wall of the purification chamber.

[0010] The beneficial effects achieved by this utility model using the above structure are as follows: The purification device for formaldehyde production proposed in this utility model has the following advantages:

[0011] (1) The dust and particulate matter on the filter screen can be adsorbed and transferred to the dust collection box by the dust suction mechanism. The negative pressure adsorption is used instead of scraper cleaning to clean the filter screen, which can effectively prevent dust or particulate matter from passing through the filter screen and entering the side near the porous rubber plate when the scraper is applied, thus affecting the formaldehyde purification effect.

[0012] (2) The fixed connection mechanism enables convenient connection and disassembly between the box cover and the purification box, making it easy to remove the filter screen, porous rubber plate and heating frame from the purification box.

[0013] (3) The multiple sets of branch pipes on the inlet and outlet pipes allow formaldehyde gas to enter and exit the purification box at multiple points, thereby allowing formaldehyde gas to enter the purification box in a diffuse manner, increasing the contact area between formaldehyde gas and the filter screen, and ensuring the filtration efficiency and effect of formaldehyde gas. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 A magnified view of part A;

[0017] Figure 3 This is a top view of the purification box of this utility model;

[0018] Figure 4 This is a top view of the installation structure of the filter screen, porous rubber sheet and heating frame of this utility model;

[0019] Figure 5 This is a cross-sectional view of the dust collection box of this utility model.

[0020] The components are as follows: 1. Purification box; 2. Box cover; 3. Air inlet pipe; 4. Air outlet pipe; 5. Filter screen; 6. Perforated rubber sheet; 7. Heating frame; 8. Slot; 9. Insert plate; 10. Mounting groove; 11. Raised mounting plate; 12. Heating wire; 13. Fixing bolt; 14. Support plate; 15. Fixing slide bar; 16. Fixing spring; 17. Elastic telescopic tube; 18. Handle; 19. Limiting plate one; 20. Fixing hole one; 21. Fixing hole two; 22. Limiting plate two; 23. Dust collection box; 24. Dust pump; 25. Height adjustment motor; 26. Height adjustment screw; 27. Threaded plate; 28. Dust suction head; 29. ​​Sealing door; 30. Dust suction pipe one; 31. Dust filter screen; 32. Dust suction pipe two; 33. Branch pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0023] like Figure 1 , Figure 3 and Figure 4As shown, this embodiment provides a purification device for formaldehyde production, including a purification box 1, a box cover 2, an air inlet pipe 3, an air outlet pipe 4, a filter screen 5, a porous rubber sheet 6, a heating frame 7, a dust collection mechanism, and a fixing connection mechanism. A slot 8 is provided on the top of the side wall of the purification box 1. The fixing connection mechanism is located on the side wall of the purification box 1. A mounting plate 9 is provided on the lower surface of the box cover 2, and mounting holes are provided on the mounting plate 9. The mounting plate 9 is inserted into the slot 8. The fixing connection mechanism is correspondingly arranged with the mounting holes. Under the action of the fixing connection mechanism, the box cover 2 and the purification box 1 can be connected. The air inlet pipe 3 and the air outlet pipe 4 are respectively located on the two side walls of the purification box 1. A mounting groove 10 is provided on the top of the side wall of the purification box 1. The filter screen 5 and the porous rubber sheet 6 are also included. Both sides of the upper end of the rubber plate 6 and the heating frame 7 are provided with raised mounting plates 11. The filter screen 5, the porous rubber plate 6 and the heating frame 7 are respectively installed in the mounting groove 10 through the corresponding raised mounting plates 11. The bottom wall and side wall of the filter screen 5, the porous rubber plate 6 and the heating frame 7 are all in contact with the bottom wall and side wall of the purification box 1. The filter screen 5 is set near the air inlet pipe 3, the heating frame 7 is set near the air outlet pipe 4, the porous rubber plate 6 is located between the filter screen 5 and the heating frame 7, and the heating frame 7 is provided with an electric heating wire 12. The dust suction mechanism is set on the box cover 2. The dust suction mechanism is set corresponding to the filter screen 5 and is located on the side of the filter screen 5 near the air inlet. Under the action of the dust suction mechanism, the dust or particulate matter adsorbed on the surface of the filter screen 5 can be adsorbed and cleaned.

[0024] Specifically, refer to Figure 2 In this embodiment, the fixing connection mechanism includes a fixing bolt 13, a support plate 14, a fixing slide rod 15, a fixing spring 16, and a handle 18. A fixing groove is provided on the side wall of the purification box 1. The fixing groove is perpendicular to and communicates with the insertion slot 8. The fixing bolt 13 is slidably disposed in the fixing groove. A limiting plate 19 is provided on the fixing bolt 13. The limiting plate 19 is disposed near one end of the fixing bolt 13. Two sets of fixing holes are provided on the fixing bolt 13. The two sets of fixing holes are located on both sides of the limiting plate 19. The two sets of fixing holes are fixing hole 20 and fixing hole 21, respectively. One end of the fixing bolt 13 is adapted to the insertion hole. When the fixing bolt 13 is inserted into the insertion hole of the insertion plate 9, the box cover 2 and the purification box can be connected. The connection is as follows: the support plate 14 is fixedly installed on the outer wall of the purification box 1, the fixed slide rod 15 is slidably installed on the support plate 14, the fixed slide rod 15 is provided with a limiting plate 22, the handle 18 is provided at one end of the fixed slide rod 15, and the other end of the fixed slide rod 15 is adapted to two sets of fixing holes. By embedding the free end of the fixed slide rod 15 into different fixing holes, the position of the fixing bolt 13 is fixed, thereby adjusting the positional relationship between the box cover 2 and the purification box 1. The fixing spring 16 is sleeved on the fixed slide rod 15, and the two ends of the fixing spring 16 are respectively connected to the support plate 14 and the limiting plate 22. Under the action of the fixing spring 16, the free end of the fixed slide rod 15 can be stably embedded in the fixing hole.

[0025] Specifically, refer to Figure 1 In this embodiment, two sets of fixed connection mechanisms are symmetrically arranged on both sides of the purification box 1, and two sets of insert plates 9 and the lower surface of the box cover 2 are arranged. The two sets of insert plates 9 are respectively arranged corresponding to the two sets of fixed connection mechanisms.

[0026] Specifically, refer to Figure 1 and Figure 5 In this embodiment, the dust collection mechanism includes a dust collection box 23, a dust pump 24, a height adjustment motor 25, a height adjustment screw 26, a guide slide rod, and a threaded plate 27. The height adjustment motor 25 is fixedly mounted on the upper surface of the box cover 2. The height adjustment screw 26 is rotatably mounted on the box cover 2 and is connected to the output shaft of the height adjustment motor 25. The guide slide rod is located on the lower surface of the box cover 2 and is parallel to the height adjustment screw 26. The guide slide rod is located behind the height adjustment screw 26 and is obscured by the height adjustment screw 26, so it is not shown in the figure. One end of the threaded plate 27 is connected to the height adjustment screw 26 by a thread, and the other end of the threaded plate 27 is slidably mounted on the guide slide rod. A dust collection head 28 is provided on the threaded plate 27 and is located near the filter screen 5. The dust collection box 23... A sealing door 29 is hinged to the front of the dust collection box 23 and fixedly mounted on the upper surface of the box cover 2. The dust pump 24 is fixedly mounted on the side wall of the dust collection box 23. A first suction pipe 30 is connected between the side wall of the dust collection box 23 and the dust pump 24. A dust filter 31 is provided at the position where the first suction pipe 30 connects to the side wall of the dust collection box 23 to prevent dust or particles from entering the dust pump 24 and causing damage to the dust pump 24. A second suction pipe 32 is provided on the top wall of the dust collection box 23. The second suction pipe 32 passes through the box cover 2. An elastic telescopic tube 17 is connected to the lower end of the second suction pipe 32. The elastic telescopic tube 17 passes through the threaded plate 27 and is connected to the suction head 28. Under the driving action of the height adjustment screw 26, the suction head 28 can be moved along the height direction of the filter screen 5, thereby achieving the cleaning of the surface of the filter screen 5.

[0027] Specifically, refer to Figure 1 In this embodiment, multiple branch pipes 33 are connected to both the air inlet pipe 3 and the air outlet pipe 4. The branch pipes 33 are connected to the side wall of the purification box 1. With the cooperation of multiple branch pipes 33, formaldehyde gas can enter and exit the purification box 1 at multiple points, so that the formaldehyde gas enters the purification box 1 in a diffuse manner, which increases the contact area between the formaldehyde gas and the filter screen 5 and ensures the filtration efficiency and effect of the formaldehyde gas.

[0028] In practical use, when cleaning the filter 5 is required, the height adjustment motor 25 and the dust pump 24 are started. The height adjustment motor 25 drives the height adjustment screw 26 to rotate. With the help of the guide slide, the threaded plate 27 drives the suction head 28 to clean along the height direction of the filter 5. The suction head 28 stores the adsorbed dust and particles in the dust collection box 23. The dust collection box 23 needs to be cleaned periodically. Cleaning or maintenance of the filter 5, the porous rubber plate 6, and the heating frame 7 can also be achieved by opening the box cover 2. The specific opening method for the lid 2 is as follows: Pull the handle 18 outwards. The handle 18 causes the fixed slide rod 15 to slide, and the free end of the fixed slide rod 15 moves out of the second fixing hole 21. Pull the fixing bolt 13 outwards along the fixing groove to release the fixing bolt 13 from the insert plate 9. When the fixing hole 20 of the fixing bolt 13 corresponds to the fixed slide rod 15, release the handle 18. The free end of the fixed slide rod 15 is inserted into the fixing hole 20, fixing the fixing bolt 13. Then, the lid 2 can be removed from the purification box 1.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, material, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, material, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A purification device for formaldehyde production, characterized in that: The system includes a purification chamber, a lid, an air inlet pipe, an air outlet pipe, a filter, a perforated rubber sheet, a heating frame, a dust collection mechanism, and a fixing and connecting mechanism. The top of the side wall of the purification chamber has a slot. The fixing and connecting mechanism is located on the side wall of the purification chamber. The lower surface of the lid has an insert plate with insert holes. The insert plate is inserted into the slot. The fixing and connecting mechanism is correspondingly positioned to the insert holes. The air inlet pipe and air outlet pipe are located on the two side walls of the purification chamber. The top of the side wall of the purification chamber has a mounting groove. The filter, perforated rubber sheet, and... Both sides of the upper end of the heating frame are provided with raised mounting plates. The filter screen, porous rubber plate and heating frame are respectively installed in the mounting groove through the corresponding raised mounting plates. The bottom wall and side wall of the filter screen, porous rubber plate and heating frame are all in contact with the bottom wall and side wall of the purification box. The filter screen is set near the air inlet pipe and the heating frame is set near the air outlet pipe. The porous rubber plate is located between the filter screen and the heating frame. The heating frame is provided with heating wire. The dust suction mechanism is set on the box cover. The dust suction mechanism is set corresponding to the filter screen and is located on the side of the filter screen near the air inlet.

2. The purification device for formaldehyde production according to claim 1, characterized in that: The fixed connection mechanism includes a fixing bolt, a support plate, a fixing slide rod, a fixing spring, and a handle. A fixing groove is formed on the side wall of the purification chamber, perpendicular to and communicating with the insertion slot. The fixing bolt is slidably disposed within the fixing groove. A limiting plate is provided on the fixing bolt, with one end of the limiting plate near the fixing bolt. Two sets of fixing holes are formed on the fixing bolt, located on opposite sides of the limiting plate. These two sets of fixing holes are respectively fixing hole one and fixing hole two. One end of the fixing bolt is adapted to the insertion hole. The support plate is fixedly disposed on the outer wall of the purification chamber. The fixing slide rod is slidably disposed on the support plate, with a limiting plate two on the fixing slide rod. The handle is located at one end of the fixing slide rod, and the other end of the fixing slide rod is adapted to the two sets of fixing holes. The fixing spring is sleeved on the fixing slide rod, with both ends connected to the support plate and the limiting plate two, respectively.

3. The purification device for formaldehyde production according to claim 2, characterized in that: Two sets of fixed connection mechanisms are symmetrically arranged on both sides of the purification box, and two sets of insert plates are arranged on the lower surface of the box cover. The two sets of insert plates are respectively arranged corresponding to the two sets of fixed connection mechanisms.

4. The purification device for formaldehyde production according to claim 1, characterized in that: The dust collection mechanism includes a dust collection box, a dust pump, a height adjustment motor, a height adjustment screw, a guide slide, and a threaded plate. The height adjustment motor is fixedly mounted on the upper surface of the box cover. The height adjustment screw is rotatably mounted on the box cover and connected to the output shaft of the height adjustment motor. The guide slide is located on the lower surface of the box cover and is parallel to the height adjustment screw. One end of the threaded plate is threaded to the height adjustment screw, and the other end of the threaded plate is slidably mounted on the guide slide. The threaded plate is equipped with a suction... The dust collection head is positioned near the filter screen. The dust collection box is fixedly mounted on the upper surface of the box cover. A sealing door is hinged to the front side of the dust collection box. The dust pump is fixedly mounted on the side wall of the dust collection box. A first suction pipe is connected between the side wall of the dust collection box and the dust pump. A dust filter screen is provided at the position where the first suction pipe connects to the side wall of the dust collection box. A second suction pipe is provided on the top wall of the dust collection box. The second suction pipe passes through the box cover. An elastic telescopic tube is connected to the lower end of the second suction pipe. The elastic telescopic tube passes through a threaded plate and is connected to the dust collection head.

5. The purification device for formaldehyde production according to claim 1, characterized in that: Multiple branch pipes are connected to both the air inlet pipe and the air outlet pipe, and the branch pipes are connected to the side wall of the purification box.

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