A tail gas treatment device for formaldehyde production

Abstract

This utility model discloses a tail gas treatment device for formaldehyde production, belonging to the field of formaldehyde tail gas treatment technology. It includes: a housing and a treatment box disposed inside the housing for tail gas treatment during formaldehyde production; the vertical side of the housing has a groove, the inner wall of which is tightly fitted with a connecting frame; the bottom of the treatment box has a slot for inserting the connecting frame; connecting blocks are fixed on both sides of the connecting frame; connecting blocks are fixed on both sides of the two connecting blocks and tightly fitted with the outer wall of the treatment box; the vertical side of the two connecting blocks is threaded with fixing nails extending into the interior of the treatment box; and mounting grooves are provided on both sides of the housing. This tail gas treatment device for formaldehyde production increases the contact area between the treatment liquid and the tail gas, shortens the tail gas treatment time, facilitates the disassembly of the filter screen, and allows for the cleaning and collection of scale, thus improving efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of formaldehyde exhaust gas treatment technology, and in particular, it is an exhaust gas treatment device for formaldehyde production. Background Technology

[0002] Currently, industrially produced formaldehyde is mainly produced from methanol using the methanol-air oxidation method in the formaldehyde production workshop. The final exhaust gas discharged from the top of the three towers contains 18%-20% H2, 0.5% each of CO, CH4, and O2, 5% CO2, 72%-74% N2, water, and trace amounts of formaldehyde and methanol.

[0003] Formaldehyde exhaust gas treatment equipment needs to use filters to isolate dust and solid impurities in the exhaust gas. Existing devices typically use filters installed inside the device, which are not easy to disassemble. In addition, when formaldehyde is heated and mixed with exhaust gas treatment liquid, scale will be produced and adhere to the inside of the treatment device or the surface of the filter, which is not easy to clean and remove, thus reducing the efficiency of use.

[0004] For example, a paraformaldehyde production exhaust gas treatment device (authorization announcement number CN216909530U) is equipped with an electric telescopic rod, a motor, a support rod, and a dust collection box. It can automatically flip the filter bags to clean the dust remaining in the bags, preventing clogging and ensuring optimal filtration. However, this device suffers from the problem of making it difficult to clean and remove scale and filter screens inside the device, thus reducing its efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a tail gas treatment device for formaldehyde production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tail gas treatment device for formaldehyde production, comprising: a box body and a treatment box disposed inside the box body for tail gas treatment during formaldehyde production; the vertical side of the box body is provided with a groove, the inner wall of the groove is tightly attached to a connecting frame, the bottom of the treatment box is provided with a slot for inserting the connecting frame, both sides of the connecting frame are fixed with connecting blocks, both sides of the two connecting blocks are fixed with connecting blocks tightly attached to the outer wall of the treatment box, the vertical side of the two connecting blocks is threaded with fixing nails extending into the interior of the treatment box, and both sides of the box body are provided with mounting grooves;

[0007] The processing box has a mounting frame fixed to its vertical side. A telescopic rod is installed on the inner bottom wall of the mounting frame. The processing box has an inlay groove that is spliced ​​with the mounting frame on its vertical side. A connecting plate that is flush with the processing box is installed on the moving part of the telescopic rod. A vertical plate is fixed to the vertical side of the connecting plate. A scraper is fixed to the bottom end of the vertical plate.

[0008] In a further embodiment, two mounting plates are fixed inside the vertical part of the connecting frame, and a second filter screen is fixed between the two mounting plates.

[0009] In a further embodiment, a hollow block is fixed to the bottom of the housing, and the hollow block communicates with the processing box by aligning with the second filter screen.

[0010] In a further embodiment, four partitions are fixed to the vertical inner wall of the scraper, and a frame is fixed to the top of the four partitions.

[0011] In a further embodiment, a rotary motor is mounted on the vertical side of the sleeve, a protective cover for the rotary motor is fixed to the vertical side of the sleeve, a rotating rod is mounted on the drive end of the rotary motor, and a rotating frame is sleeved around the outer periphery of the rotating rod.

[0012] In a further embodiment, the vertical inner wall of the rotating frame is provided with a first filter screen.

[0013] In a further embodiment, an air intake pipe is installed at the top of the hollow block.

[0014] In a further embodiment, four fixing plates are fixed to the top of the processing box, and a top cover that is tightly attached to the vertical inner wall of the processing box is fixed to the bottom of the four fixing plates. Four support plates are fixed to the bottom of the box.

[0015] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0016] This exhaust gas treatment equipment for formaldehyde production, during operation, uses a frame set at the top of the partition, and a rotating motor on the vertical side of the frame to drive the rotating frame on the outer periphery of the rotating rod and the first filter screen on the inner wall of the rotating frame of the device to rotate, thereby increasing the contact area between the treatment liquid and the exhaust gas and shortening the exhaust gas treatment time.

[0017] This formaldehyde production exhaust gas treatment equipment, when cleaning and disassembly are required, utilizes a telescopic rod located on the bottom wall of the mounting frame. This telescopic rod moves the connecting plate and vertical plate vertically. A scraper at the bottom of the vertical plate removes scale from the inner wall of the treatment chamber. The upward-moving rotating frame then removes the first filter screen, allowing the scale to fall into the connecting frame. By unscrewing the fixing screws on the side of the connecting block through the mounting groove on the side of the chamber, the connecting block detaches from the connecting frame that fits into the slot. This allows for easy removal of the second filter screen, cleaning and collection of scale, and improved efficiency. This formaldehyde production exhaust gas treatment equipment increases the contact area between the treatment liquid and the exhaust gas, shortens the exhaust gas treatment time, facilitates filter screen disassembly, and improves scale cleaning and collection, thus enhancing overall efficiency. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 A schematic diagram of the structure with the top cover removed;

[0021] Figure 3 For the present utility model Figure 2 A schematic diagram of the structure after removing the frame and scraper;

[0022] Figure 4 This is a schematic diagram of the internal structure of the processing box of this utility model;

[0023] Figure 5 For the present utility model Figure 4 A schematic diagram of the structure after removing the protective cover;

[0024] Figure 6 This is a schematic diagram of the processing box of this utility model;

[0025] Figure 7 This is a schematic diagram of the connecting frame of this utility model;

[0026] Figure 8 This is a schematic diagram of the slot structure of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] In the diagram: 1. Top cover; 2. Processing box; 3. Box body; 4. Mounting slot; 5. Connecting frame; 6. Fixing plate; 7. Support plate; 8. Connecting plate; 9. Vertical plate; 10. Telescopic rod; 11. Mounting frame; 12. Air inlet pipe; 13. Hollow block; 14. Rotating frame; 15. First filter screen; 16. Scraper; 17. Rotary motor; 18. Sleeve frame; 19. Protective cover; 20. Slot; 21. Connecting block; 22. Second filter screen; 23. Mounting plate; 24. Connecting block; 25. Fixing nail. Detailed Implementation

[0029] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0030] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0031] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0032] Example

[0033] Please see Figures 1 to 8 The housing 3 is the main body of the device, and the processing box 2 is fixed inside the housing 3. The vertical side of the housing 3 has a groove, and the inner wall of the groove is tightly fitted with a connecting frame 5. The bottom of the processing box 2 has a slot 20 for inserting the connecting frame 5. Connecting blocks 24 are fixed on both sides of the connecting frame 5, and connecting blocks 21 tightly fitted to the outer wall of the processing box 2 are fixed on both sides of each connecting block 24. The vertical sides of each connecting block 21 are threaded with fixing nails 25 extending into the interior of the processing box 2. The housing 3 has mounting grooves 4 on both sides; [The last sentence appears to be incomplete and possibly refers to a mounting frame.] The telescopic rod 10 on the inner bottom wall of 11 drives the connecting plate 8 and the vertical plate 9 to move up and down. The scraper 16 set at the bottom of the vertical plate 9 can scrape off the scale on the inner wall of the treatment box 2. Then the rotating frame 14 moves up and can remove the first filter screen 15. Then the scale falls into the connecting frame 5. Through the mounting groove 4 set on the side of the box 3, the fixing nail 25 set on the side of the connecting block 21 is unscrewed, so that the connecting block 21 and the connecting frame 5 on the inner wall of the fitting slot 20 are detached and pulled out from the groove on the side of the box 3.

[0034] This facilitates the disassembly of the second filter screen 22, allowing for the cleaning and collection of scale, thus improving efficiency. A mounting frame 11 is fixed to the vertical side of the treatment box 2. A telescopic rod 10 is installed on the inner bottom wall of the mounting frame 11. An inlay groove is provided on the vertical side of the treatment box 2 to connect with the mounting frame 11. A connecting plate 8, flush with the treatment box 2, is installed on the moving part of the telescopic rod 10. A vertical plate 9 is fixed to the vertical side of the connecting plate 8, and a scraper 16 is fixed to the bottom end of the vertical plate 9.

[0035] Two mounting plates 23 are fixed vertically inside the connecting frame 5, and a second filter screen 22 is fixed between the two mounting plates 23. A hollow block 13 is fixed at the bottom of the box 3, and the hollow block 13 communicates with the processing box 2 by aligning with the second filter screen 22. Four partitions are fixed on the vertical inner wall of the scraper 16, and a frame 18 is fixed at the top of the four partitions. A rotary motor 17 is installed on the vertical side of the frame 18, and a protective cover 19 covering the rotary motor 17 is fixed on the vertical side of the frame 18. A rotating rod is installed at the drive end of the rotary motor 17, and a rotating frame 14 is sleeved on the outer periphery of the rotating rod. A first filter screen 15 is provided on the vertical inner wall of the rotating frame 14. An air inlet pipe 12 is installed at the top of the hollow block 13. Four fixing plates 6 are fixed at the top of the processing box 2, and a top cover 1 that is close to the vertical inner wall of the processing box 2 is fixed at the bottom of the four fixing plates 6. Four support plates 7 are fixed at the bottom of the box 3. Methods for purifying formaldehyde waste gas include: nanomaterial catalytic oxidation, ozone oxidation, photocatalytic oxidation, and biological purification. Different treatment solutions or external heating can be used depending on specific needs.

[0036] The telescopic rod 10 and the rotary motor 17 are both conventional instruments. Their working principles, dimensions, and models are irrelevant to the function of this application, so they will not be described in detail. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0037] Working principle

[0038] This exhaust gas treatment equipment for formaldehyde production operates by using a telescopic rod 10 located on the bottom wall of the mounting frame 11 to move the connecting plate 8 and the vertical plate 9 vertically. This causes the vertical plate 9 to drive the scraper 16 to scrape off the scale on the vertical inner wall of the treatment box 2, allowing the scale to fall into the connecting frame 5. Then, by unscrewing the fixing nail 25 located on the side of the connecting block 21 through the mounting groove 4 on the side of the box 3, the connecting block 21 and the connecting frame 5 on the inner wall of the fitting slot 20 are detached. The connecting frame 5 is then pulled out from the groove on the side of the box 3, allowing the second filter screen 22 to be disassembled and the scale to be treated, thus improving efficiency.

[0039] It should be noted that, in this document, relational terms such as "one" and "two" are used merely 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, article, 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 a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] 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 tail gas treatment device for formaldehyde production, comprising: Box body (3) and treatment box (2) set inside box body (3) for treating exhaust gas during formaldehyde production process; characterized in that: the vertical side of box body (3) is provided with a groove, the inner wall of the groove is tightly attached to the connecting frame (5), the bottom end of treatment box (2) is provided with a slot (20) for the connecting frame (5) to be inserted, both sides of the connecting frame (5) are fixed with connecting blocks (24), both sides of the two connecting blocks (24) are fixed with connecting blocks (21) tightly attached to the outer wall of treatment box (2), both vertical sides of the two connecting blocks (21) are threaded with fixing nails (25) extending into the interior of treatment box (2), and both sides of box body (3) are provided with mounting grooves (4); The processing box (2) has a mounting frame (11) fixed on its vertical side. A telescopic rod (10) is installed on the inner bottom wall of the mounting frame (11). The processing box (2) has an inlay groove that is spliced ​​with the mounting frame (11) on its vertical side. A connecting plate (8) that is flush with the processing box (2) is installed on the moving part of the telescopic rod (10). A vertical plate (9) is fixed on the vertical side of the connecting plate (8). A scraper (16) is fixed at the bottom end of the vertical plate (9).

2. The tail gas treatment apparatus for producing formaldehyde according to claim 1, characterized by: Two mounting plates (23) are fixed inside the vertical part of the connecting frame (5), and a second filter screen (22) is fixed between the two mounting plates (23).

3. The tail gas treatment apparatus for producing formaldehyde according to claim 1, characterized by: A hollow block (13) is fixed at the bottom of the box (3), and the hollow block (13) communicates with the processing box (2) by aligning with the second filter screen (22).

4. The tail gas treatment apparatus for producing formaldehyde according to claim 1, characterized by: The scraper (16) has four partitions fixed to its vertical inner wall, and the top of the four partitions is fixed with a frame (18).

5. An off-gas treatment apparatus for producing formaldehyde according to claim 4, characterized by: A rotary motor (17) is installed on the vertical side of the sleeve (18), and a protective cover (19) covering the rotary motor (17) is fixed on the vertical side of the sleeve (18). A rotating rod is installed on the drive end of the rotary motor (17), and a rotating frame (14) is sleeved on the outer periphery of the rotating rod.

6. The tail gas treatment apparatus for producing formaldehyde according to claim 5, characterized by: The rotating frame (14) is provided with a first filter screen (15) on its vertical inner wall.

7. The exhaust gas treatment equipment for formaldehyde production according to claim 3, characterized in that: An air inlet pipe (12) is installed at the top of the hollow block (13).

8. The tail gas treatment apparatus for producing formaldehyde according to claim 1, characterized by: The top of the processing box (2) is fixed with four fixing plates (6), and the bottom of the four fixing plates (6) is fixed with a top cover (1) that is close to the vertical inner wall of the processing box (2). The bottom of the box body (3) is fixed with four support plates (7).

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