Waste gas recovery treatment device for paraformaldehyde production

Abstract

The utility model discloses a waste gas recovery treatment device for paraformaldehyde production. The waste gas recovery treatment device comprises a protective shell for mounting and a mounting door fixedly mounted on the left side of the upper end of the protective shell, the outer end of the sealing ring is fixedly connected with the upper end of the mounting door, a bolt is mounted in the middle of the mounting door, a first filter screen plate and a second filter screen plate are mounted at the lower end of the bolt, the second filter screen plate is located on the right side of the first filter screen plate, a first spring is mounted at the lower end of the first filter screen plate, and a second spring is mounted at the lower end of the second filter screen plate. A first clamping block is connected to the left side of the first spring, a second clamping block is connected to the right side of the first spring, and a clamping groove is formed in the lower end of the left side of the second filter screen plate. And connecting the base. According to the waste gas recovery treatment device for paraformaldehyde production, the first filter screen plate is conveniently limited, meanwhile, gas leakage is avoided, the filter device is conveniently and rapidly disassembled and assembled, and waste gas recovery treatment on formaldehyde is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas recovery and treatment devices for formaldehyde production, in particular to a waste gas recovery and treatment device for paraformaldehyde production. Background Art

[0002] Formaldehyde is a commonly used chemical. In the production process of formaldehyde, industrial waste gas is generated. These waste gases contain more toxic substances and need to be recycled before subsequent treatment. Therefore, a waste gas recovery and treatment device is needed. At present, the waste gas recovery and treatment methods used in formaldehyde production on the market are mostly activated carbon adsorption and chemical reagent spraying reaction methods to treat the waste gas. However, most of the filter devices cannot be disassembled and cleaned. Therefore, a waste recovery and treatment device that is easy to disassemble the filter is designed.

[0003] A waste gas recovery and treatment device for formaldehyde production provided by announcement number CN 208786151 U includes an air inlet hopper, an air inlet pipe is welded to the inlet end of the air inlet hopper, a reaction tube is fixed to the outlet end of the air inlet hopper by bolts, and an air outlet hopper is fixed to the end of the reaction tube away from the air inlet hopper by bolts, and an air outlet pipe is welded to the end of the air outlet hopper away from the reaction tube, and a buffer device is provided in both the air inlet hopper and the air outlet hopper, and the buffer device includes a first buffer plate, a second buffer plate and a third buffer plate, and the second buffer plate is located between the first buffer plate and the third buffer plate. The utility model has a compact structure and is a reaction treatment device for recovering and treating waste gas in the formaldehyde production process. The device can reduce the flow rate of the waste gas, thereby allowing the chemical reagent to fully contact and react with the gas, and the device has a waste liquid collection function to avoid waste liquid accumulation in the device.

[0004] The above-mentioned prior art solutions have the following defects: it is not convenient to limit the first filter plate, gas leakage cannot be avoided, it is not convenient to quickly disassemble and install the filter device, and it is not convenient to recover the formaldehyde waste gas. Therefore, the utility model provides a waste gas recovery and treatment device for polyformaldehyde production to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a waste gas recovery and treatment device for the production of polyformaldehyde, so as to solve the problems raised in the above-mentioned background technology that it is inconvenient to limit the first filter plate, gas leakage cannot be avoided, the filtering device is not convenient to be quickly disassembled and installed, and the waste gas recovery and treatment of formaldehyde is not convenient.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste gas recovery and treatment device for the production of polyformaldehyde, comprising: a protective shell for installation, and a mounting door fixedly installed on the left side of the upper end of the protective shell;

[0007] It also includes: a sealing ring, the outer end of which is fixedly connected to the upper end of the installation door, and a bolt is installed in the middle of the installation door, the lower ends of the bolts are both installed with a first filter plate and a second filter plate, and the second filter plate is located on the right side of the first filter plate, a first spring is installed at the lower end of the first filter plate, and a first clamping block is connected to the left side of the first spring, and a second clamping block is connected to the right side of the first spring, and a clamping groove is provided at the lower left end of the second filter plate;

[0008] A connecting base is arranged at the lower end of the interior of the protective shell, a hole groove is arranged in the middle of the connecting base, and a third clamping block and a second spring are installed inside the hole groove, and the second spring is located on the outside of the third clamping block, a nozzle is arranged at the upper end of the interior of the protective shell, and a fan is installed at the rear end of the interior of the protective shell, a third filter plate is installed on the right side of the interior of the protective shell, and an air inlet is arranged on the left side of the protective shell, a waste pipe is arranged at the lower end of the protective shell, and an air outlet is arranged on the right side of the protective shell.

[0009] Preferably, the upper end of the sealing ring is arranged in a fit state with the bolt, and the bolt is connected to the middle part of the installation door in a threaded manner.

[0010] Preferably, the lower end of the bolt is connected to the first filter plate in a threaded manner, and the lower end of the first filter plate is connected to the connecting base in a snap-fit ​​manner.

[0011] Preferably, the left side of the first clamping block is arranged in an arc shape, and the first clamping block forms a sliding structure inside the lower end of the first filter plate.

[0012] Preferably, the third clamping block forms a sliding structure inside the hole groove, and the right side of the third clamping block is connected to the clamping groove in a clamping manner.

[0013] Preferably, the fan is symmetrically arranged about the center line of the protective shell, and the waste duct is arranged in an L-shape inside the lower end of the protective shell.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the waste gas recovery and treatment device for the production of polyformaldehyde is convenient for limiting the first filter plate, while avoiding gas leakage, facilitating rapid disassembly and installation of the filter device, and facilitating waste gas recovery and treatment of formaldehyde;

[0015] 1. A sealing ring, a bolt and a first filter plate are provided. After the first filter plate and the second filter plate are installed on the upper end of the connection base, the installation door is re-covered, and a bolt is installed in the middle of the installation door. The installation door and the first filter plate are connected by the bolt. At the same time, after the bolt is installed, it fits with the upper end of the sealing ring to avoid leakage, ensure its sealing, facilitate the first filter plate to be limited, and avoid gas leakage;

[0016] 2. A second clamping block, a clamping slot and a third clamping block are provided. When the lower end of the first filter screen plate is first installed in the middle of the connecting base, the first clamping block is clamped in the hole slot inside the connecting base through the rebound of the first spring, and the second clamping block is clamped inside the hole slot and fits with the third clamping block, and at the same time drives the third clamping block to move and clamp inside the clamping slot, thereby stabilizing the position of the second filter screen plate and facilitating the rapid disassembly and installation of the filter device;

[0017] 3. A nozzle and a fan are provided. When formaldehyde gas enters the protective shell from the air inlet, it is filtered by the first filter plate and the second filter plate. When the formaldehyde gas passes through the middle of the protective shell, the nozzle starts to spray liquid catalyst to produce a chemical reaction with methanol, and then the reaction efficiency is accelerated by the rotation of the fan, which is convenient for the waste gas recovery of formaldehyde. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the side cross-sectional structure of the utility model;

[0020] Figure 3 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0021] Figure 4 For this utility model Figure 1 Enlarged structural diagram at B in the middle.

[0022] In the figure: 1. Protective shell; 2. Mounting door; 3. Sealing ring; 4. Bolt; 5. First filter plate; 6. Second filter plate; 7. First spring; 8. First clamping block; 9. Second clamping block; 10. Clamping slot; 11. Connecting base; 12. Hole slot; 13. Third clamping block; 14. Second spring; 15. Nozzle; 16. Fan; 17. Third filter plate; 18. Air inlet; 19. Waste pipe; 20. Air outlet. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4The utility model provides a technical solution: a waste gas recovery and treatment device for the production of polyformaldehyde, including a protective shell 1, a mounting door 2, a sealing ring 3, a bolt 4, a first filter plate 5, a second filter plate 6, a first spring 7, a first clamping block 8, a second clamping block 9, a clamping groove 10, a connecting base 11, a hole groove 12, a third clamping block 13, a second spring 14, a nozzle 15, a fan 16, a third filter plate 17, an air inlet 18, a waste pipe 19 and an air outlet 20.

[0025] The outer end of the sealing ring 3 is fixedly connected to the upper end of the installation door 2, and a bolt 4 is installed in the middle of the installation door 2, and the lower ends of the bolts 4 are both installed with a first filter plate 5 and a second filter plate 6, and the second filter plate 6 is located on the right side of the first filter plate 5, and the lower end of the first filter plate 5 is installed with a first spring 7, and the left side of the first spring 7 is connected to a first clamping block 8, and the right side of the first spring 7 is connected to a second clamping block 9, and the lower left end of the second filter plate 6 is provided with a clamping groove 10;

[0026] A connecting base 11 is arranged at the lower end of the interior of the protective shell 1, a hole groove 12 is arranged in the middle of the connecting base 11, and a third clamping block 13 and a second spring 14 are installed inside the hole groove 12, and the second spring 14 is located on the outside of the third clamping block 13, a nozzle 15 is arranged at the upper end of the interior of the protective shell 1, and a fan 16 is installed at the rear end of the interior of the protective shell 1, a third filter plate 17 is installed on the right side of the interior of the protective shell 1, and an air inlet 18 is arranged on the left side of the protective shell 1, a waste pipe 19 is arranged at the lower end of the protective shell 1, and an air outlet 20 is arranged on the right side of the protective shell 1.

[0027] like Figure 1 , Figure 3 and Figure 4 As shown, the upper end of the sealing ring 3 is arranged in a fit state with the bolt 4, and the bolt 4 is connected to the middle part of the installation door 2 by means of a thread, the lower end of the bolt 4 is connected to the first filter plate 5 by means of a thread, and the lower end of the first filter plate 5 is connected to the connecting base 11 by means of a snap-fit, the left side of the first clamping block 8 is arranged in an arc-shaped state, and the first clamping block 8 forms a sliding structure inside the lower end of the first filter plate 5, which is convenient for quick installation and fixation of the filtering device.

[0028] like Figure 4 As shown, the third clamping block 13 forms a sliding structure inside the hole groove 12, and the right side of the third clamping block 13 is connected to the clamping groove 10 in a clamping manner.

[0029] like Figure 1 As shown, the fan 16 is symmetrically arranged about the center line of the protective shell 1, and the waste pipe 19 is arranged in an L-shaped state inside the lower end of the protective shell 1.

[0030] Working principle: When using the waste gas recovery and treatment device for the production of polyformaldehyde, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, first open the installation door 2 and install the lower ends of the first filter plate 5 and the second filter plate 6 in the middle of the connecting base 11, and through the installation of the first filter plate 5, the first clamping block 8 is engaged in the internal groove of the connecting base 11, and the second clamping block 9 is engaged in the inside of the hole groove 12, and the right side of the second clamping block 9 is in contact with the third clamping block 13, driving the third clamping block 13 to slide to the right to squeeze the second spring 14, and finally engage with the inside of the clamping groove 10 at the lower right end of the second filter plate 6, and fix the first filter plate 5 and the second filter plate 6 in position through the linkage relationship. After installation, in order to avoid falling off, the installation door 2 is covered again, and the bolt 4 is installed in the middle of the installation door 2, so that the lower end of the bolt 4 will engage the installation door 2 It is connected with the first filter plate 5 and the second filter plate 6 to fix the position of the first filter plate 5 and the second filter plate 6. In order to avoid a gap in the installation of the bolt 4, the bolt 4 is fitted with the upper end of the sealing ring 3 after installation, so that a sealing effect is achieved. At this time, the fan 16 is started to input the formaldehyde gas into the interior of the protective shell 1 from the air inlet 18, and the gas is filtered through the first filter plate 5 and the second filter plate 6. The nozzle 15 sprays the catalyst to perform a chemical reaction on the formaldehyde. The reactant will be discharged through the waste pipe 19. At the same time, the treated waste gas will be filtered again through the third filter plate 17 and finally output from the air outlet 20. This is the use method of the waste gas recovery and treatment device for polyformaldehyde production.

[0031] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waste gas recovery and treatment device for paraformaldehyde production, comprising: A protective shell (1) for installation, and a mounting door (2) fixedly mounted on the left side of the upper end of the protective shell (1); It is characterized by further comprising: A sealing ring (3), the outer end of the sealing ring (3) is fixedly connected to the upper end of the mounting door (2), and a bolt (4) is installed in the middle of the mounting door (2), the lower ends of the bolts (4) are both installed with a first filter plate (5) and a second filter plate (6), and the second filter plate (6) is located on the right side of the first filter plate (5), a first spring (7) is installed at the lower end of the first filter plate (5), and a first clamping block (8) is connected to the left side of the first spring (7), and a second clamping block (9) is connected to the right side of the first spring (7), and a clamping groove (10) is provided at the lower left end of the second filter plate (6); A connecting base (11) is arranged at the lower end of the interior of the protective shell (1); a hole groove (12) is arranged in the middle of the connecting base (11); a third clamping block (13) and a second spring (14) are installed inside the hole groove (12); and the second spring (14) is located outside the third clamping block (13); a nozzle (15) is arranged at the upper end of the interior of the protective shell (1); and a fan (16) is installed at the rear end of the interior of the protective shell (1); a third filter plate (17) is installed on the right side of the interior of the protective shell (1); and an air inlet (18) is arranged on the left side of the protective shell (1); a waste pipe (19) is arranged at the lower end of the protective shell (1); and an air outlet (20) is arranged on the right side of the protective shell (1).

2. The waste gas recovery and treatment device for paraformaldehyde production according to claim 1, characterized in that: The upper end of the sealing ring (3) is arranged in a fitted state with the bolt (4), and the bolt (4) is connected to the middle part of the installation door (2) in a threaded manner.

3. The waste gas recovery and treatment device for paraformaldehyde production according to claim 1, characterized in that: The lower end of the bolt (4) is connected to the first filter plate (5) in a threaded manner, and the lower end of the first filter plate (5) is connected to the connection base (11) in a snap-fit ​​manner.

4. The waste gas recovery and treatment device for paraformaldehyde production according to claim 1, characterized in that: The left side of the first clamping block (8) is arranged in an arc-shaped state, and the first clamping block (8) forms a sliding structure inside the lower end of the first filter plate (5).

5. The waste gas recovery and treatment device for paraformaldehyde production according to claim 1, characterized in that: The third clamping block (13) forms a sliding structure inside the hole groove (12), and the right side of the third clamping block (13) is connected to the clamping groove (10) in a clamping manner.

6. The waste gas recovery and treatment device for paraformaldehyde production according to claim 1, characterized in that: The fan (16) is symmetrically arranged about the center line of the protective shell (1), and the waste pipe (19) is arranged in an L-shaped state inside the lower end of the protective shell (1).

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