Aldehyde removal device for impregnated paper workshop

Abstract

The utility model relates to the technical field of impregnated paper production, and discloses an aldehyde removing device for an impregnated paper workshop, which comprises a drying box, two symmetrically arranged aldehyde absorbing boxes are fixedly connected to the inner walls of the two sides of the drying box, a drying box is fixedly connected to the top of the inner wall of the drying box, and a purifying barrel is fixedly connected to the middle position of the outer wall of the top of the drying box. The top of the purification barrel is fixedly connected and communicated with an air pump, the air inlet end of the air pump is fixedly connected and communicated with two aldehyde suction pipes through a three-way pipe, the top of the purification barrel is communicated with an air outlet pipe, and the other end of the air outlet pipe is communicated with a drying cavity in the drying box. According to the formaldehyde removal device for the impregnated paper workshop, formaldehyde generated in the drying process in the drying box can be sucked into the purification barrel to be purified through the formaldehyde suction box, the formaldehyde suction pipe and the air pump, and then impregnated paper on the lower conveying belt is dried from a drying cavity of the drying box, so that the generated formaldehyde is prevented from being diffused into external air from the drying box; the formaldehyde purification effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of impregnated paper production, in particular to a formaldehyde removal device for an impregnated paper workshop. Background Art

[0002] Impregnated paper is a specially treated industrial paper. Its main feature is that a specific resin or other chemical substance is uniformly infiltrated into the paper through an impregnation process, thereby giving the paper new properties and uses. Impregnated paper is widely used in furniture manufacturing, architectural decoration, electronic insulation, packaging and other fields. The production process of impregnated paper mainly includes two key steps: impregnation and drying. First, the selected paper (usually wood pulp paper or non-woven fabric, etc.) is soaked in a solution containing resin (such as melamine resin, phenolic resin, polyester resin, etc.) to ensure that the resin fully penetrates into the paper fiber. Then, the impregnated paper is dried by hot air, oven, etc., so that the resin solidifies and adheres tightly to the paper to form an impregnated paper with specific properties. However, in the process of drying the impregnated paper, formaldehyde will inevitably volatilize. In order to reduce the environmental pollution caused by the volatile formaldehyde and the harm to the health of the processing personnel, a formaldehyde removal device is usually used to remove the volatile formaldehyde during the drying process.

[0003] For example, a production device for formaldehyde-free environmentally friendly impregnated paper disclosed in the patent with publication number CN219410344U includes a drying shell, a conveying device for conveying impregnated paper is inserted into the inner side of the drying shell, a purification device for removing formaldehyde is arranged above the conveying device, and air guide devices are arranged on both sides of the purification device. The two air guide devices are arranged opposite to each other, and the side of the air guide device away from the purification device is fixedly connected to the inner wall of the drying shell. The purification device is arranged, because the device continuously overflows and circulates, it has a certain stirring effect on the cleaning liquid, so that the cleaning liquid is mixed more evenly, which is beneficial to formaldehyde removal. To a certain extent, water resources are saved, and the formaldehyde cleaning liquid contacts the air containing formaldehyde many times, so that the formaldehyde cleaning liquid is used more fully.

[0004] However, the formaldehyde removal device in the above technology still has the following problems:

[0005] Since most of the formaldehyde evaporates in the form of gas during the drying process of the impregnated paper, this causes the formaldehyde to evaporate and diffuse freely in the entire drying box. The formaldehyde cleaning liquid can only come into contact with the air containing formaldehyde inside the drying box, causing part of the formaldehyde to mix in the air and diffuse from the drying box to the outside space, which in turn causes formaldehyde leakage and poor actual formaldehyde removal effect. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a formaldehyde removal device for an impregnated paper workshop, such as: reducing the diffusion of formaldehyde from a drying box to the outside as much as possible, and allowing the air mixed with formaldehyde to be fully mixed with formaldehyde cleaning liquid, thereby improving the formaldehyde removal effect.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a formaldehyde removal device for an impregnated paper workshop, comprising a drying box, a conveyor belt for conveying impregnated paper is inserted through the bottom of the inner side of the drying box, two symmetrically arranged formaldehyde absorption boxes are fixedly connected to the inner walls on both sides of the drying box, the two formaldehyde absorption boxes are respectively located in front and behind the moving direction of the conveyor belt, a formaldehyde absorption cavity is provided on the side of the two formaldehyde absorption boxes close to the conveyor belt, a drying box is fixedly connected to the top of the inner wall of the drying box, a drying cavity is provided on the side of the drying box close to the conveyor belt, a heating component is provided in the drying cavity, and the drying boxes are located between the two formaldehyde absorption boxes. The boxes are between the top and the bottom of the drying box, and a purification barrel is fixedly connected to the middle position of the outer wall of the top of the drying box. The top of the purification barrel is fixedly connected and connected to an air pump. The air inlet end of the air pump is fixedly connected and connected to two formaldehyde absorption tubes through a three-way pipe. The other ends of the two formaldehyde absorption tubes are respectively connected to two formaldehyde absorption chambers. The air outlet end of the air pump passes through the top of the purification barrel and is fixedly connected to a purification air pipe. The purification air pipe is connected to the air pump. The top of the purification barrel is connected to an air outlet pipe, and the other end of the air outlet pipe is connected to the drying chamber in the drying box. The bottom of one side of the purification barrel is fixedly connected and connected to a liquid exchange pipe, and a valve is fixedly connected to the outer wall of the liquid exchange pipe.

[0008] Furthermore, the heating assembly includes a connecting frame and a heating screen, the outer wall of the connecting frame is fixedly connected to the inner wall of the drying chamber near one end of the conveyor belt, and the heating screen is fixedly connected to the inner wall of the connecting frame.

[0009] Furthermore, the openings of the two formaldehyde absorption chambers close to one end of the conveyor belt are both inclined toward the direction of the drying box.

[0010] Furthermore, one end of the purified air pipe away from the air pump is fixedly connected and communicated with a plurality of evenly distributed shunt pipes, the plurality of shunt pipes and the purified air pipe are designed vertically, and a plurality of air outlet holes are penetrated through the outer walls of the plurality of shunt pipes.

[0011] Furthermore, the plurality of air outlets are all located on the same side of the shunt pipe, and the air outlets provided on the plurality of shunt pipes are all simultaneously oriented in the clockwise direction or simultaneously oriented in the counterclockwise direction.

[0012] Furthermore, the air outlet is arranged to be inclined toward the bottom of the purification barrel.

[0013] Furthermore, the tops of the two formaldehyde absorption boxes are fixedly connected and communicated with a first connector, the ends of the two first connectors away from the formaldehyde absorption boxes pass through the drying box, and the ends of the two formaldehyde absorption tubes away from the air pump are respectively sleeved with two first connectors.

[0014] Furthermore, there are two air outlet pipes, and the two air outlet pipes are respectively located at two ends of the top of the drying box.

[0015] Furthermore, both ends of the top of the drying box are fixedly connected and connected with a second connector, the two second connectors both pass through the top of the drying box, both sides of the top of the purification barrel are fixedly connected and connected with a connecting pipe head, the two air outlet pipes are respectively provided with two second connectors at one end close to the drying box, and the two air outlet pipes are respectively provided with two connecting pipe heads at one end away from the drying box.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] This kind of formaldehyde removal device in the impregnated paper workshop can absorb the formaldehyde generated during the drying process in the drying box into the purification barrel for purification through the formaldehyde absorption box, the formaldehyde absorption tube and the air pump, and then the purified gas enters the drying box again through the exhaust pipe, and is heated by the heating component to dry the impregnated paper on the conveyor belt below from the drying chamber of the drying box, and then is sucked into the purification barrel for purification again, thereby preventing the generated formaldehyde from diffusing from the drying box to the outside air, and through the circulation purification, the purification effect of formaldehyde is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance connection structure of the utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the connection structure of the drying box of the utility model;

[0020] Figure 3 Based on Figure 2 Exploded schematic diagram of the connection structure;

[0021] Figure 4 Based on Figure 3 A cross-sectional schematic diagram of a part of the connection structure;

[0022] Figure 5 Based on Figure 4 A cross-sectional schematic diagram of a part of the connection structure;

[0023] Figure 6 for Figure 5 A magnified schematic diagram of the connection structure at center A;

[0024] Figure 7 Schematic diagram of the connection structure of the purification barrel of the utility model;

[0025] Figure 8 Based on Figure 7 Schematic diagram of the cross-sectional view of the connection structure.

[0026] In the figure: 1. drying box; 2. conveyor belt; 3. formaldehyde absorption box; 4. drying box; 5. purification barrel; 6. air pump; 7. formaldehyde absorption tube; 8. purification air pipe; 9. outlet pipe; 10. connection frame; 11. heating screen; 12. diverter pipe; 13. first connector; 14. second connector; 15. connecting head; 16. liquid exchange pipe; 17. valve; 301. formaldehyde absorption chamber; 401. drying chamber; 801. outlet hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] See also Figure 1 - Figure 8 , a formaldehyde removal device for an impregnated paper workshop, comprising a drying box 1, a conveyor belt 2 for conveying impregnated paper is inserted through the bottom of the inner side of the drying box 1, two symmetrically arranged formaldehyde absorption boxes 3 are fixedly connected to the inner walls on both sides of the drying box 1, the two formaldehyde absorption boxes 3 are respectively located in front and behind the moving direction of the conveyor belt 2, and the two formaldehyde absorption boxes 3 are each provided with a formaldehyde absorption cavity 301 on one side close to the conveyor belt 2, a drying box 4 is fixedly connected to the top of the inner wall of the drying box 1, a drying cavity 401 is provided on the side of the drying box 4 close to the conveyor belt 2, a heating component is arranged in the drying cavity 401, the drying box 4 is located between the two formaldehyde absorption boxes 3, and the middle of the top outer wall of the drying box 1 A purification barrel 5 is fixedly connected to the intermediate position, the top of the purification barrel 5 is fixedly connected and communicated with an air pump 6, the air inlet end of the air pump 6 is fixedly connected and communicated with two formaldehyde absorption tubes 7 through a three-way pipe, the other ends of the two formaldehyde absorption tubes 7 are respectively communicated with two formaldehyde absorption chambers 301, the air outlet end of the air pump 6 passes through the top of the purification barrel 5 and is fixedly connected with a purification air pipe 8, the purification air pipe 8 is communicated with the air pump 6, the top of the purification barrel 5 is connected with an air outlet pipe 9, the other end of the air outlet pipe 9 is communicated with the drying chamber 401 in the drying box 1, the bottom of one side of the purification barrel 5 is fixedly connected and communicated with a liquid exchange pipe 16, and the outer wall of the liquid exchange pipe 16 is fixedly connected with a valve 17.

[0029] like Figure 1 - Figure 8 As shown, the formaldehyde removal device of an impregnated paper workshop in the utility model is similar in structure to the existing formaldehyde removal device of an impregnated paper workshop, such as a production device for formaldehyde-free environmentally friendly impregnated paper disclosed in the patent with publication number CN219410344U. The main improvement of the utility model is that it can reduce the diffusion of formaldehyde and improve the purification effect of formaldehyde. Figures 1 to 8As shown, when the formaldehyde removal device of the impregnated paper workshop in the utility model is in use, when the impregnated paper moves to the bottom of the drying box 1 through the conveyor belt 2, the gas in the two formaldehyde absorption boxes 3 is extracted through the formaldehyde absorption tube 7 by starting the air pump 6, and the extracted gas is filled into the purification barrel 5 through the purification air pipe 8, and then these gases rise after contacting with the formaldehyde purification liquid in the purification barrel 5, and are discharged into the drying box 4 from the outlet pipe 9, and finally, after the gas is heated by the heating component, it is blown from the drying chamber 401 to the impregnated paper on the conveyor belt 2 below, so as to dry the impregnated paper. At this time, the drying airflow carries the generated formaldehyde gas to flow to both sides of the drying box 4, and is again drawn into the formaldehyde absorption boxes 3 on both sides, and is then drawn into the purification barrel 5 by the air pump 6 for formaldehyde purification operation, completing the gas circulation purification, further improving the formaldehyde purification effect of the gas in the drying box 1, and avoiding environmental pollution caused by formaldehyde diffusion and damage to the health of the staff.

[0030] like Figure 5 and Figure 6 As shown, the heating component includes a connecting frame 10 and a heating screen 11. The outer wall of the connecting frame 10 is fixedly connected to the inner wall of the drying chamber 401 near one end of the conveyor belt 2, and the heating screen 11 is fixedly connected to the inner wall of the connecting frame 10. The heating screen 11 is electrically connected to the controller and generates high temperature when powered on, similar to a traditional hair dryer, so as to heat the gas flowing downward in the drying chamber 401, and then dry the impregnated paper on the conveyor belt 2.

[0031] like Figure 2 - Figure 5 As shown, the openings of the two aldehyde absorption chambers 301 near one end of the conveyor belt 2 are both inclined toward the drying box 4. The lower opening of the aldehyde absorption chamber 301 is inclined toward the drying box 4, so that the drying airflow sprayed from the drying box 4 can be better sucked, and the drying airflow mixed with formaldehyde can be reduced from diffusing outward from the drying box 1.

[0032] like Figure 8 As shown, one end of the purified air pipe 8 away from the air pump 6 is fixedly connected and communicated with a plurality of evenly distributed shunt pipes 12, the plurality of shunt pipes 12 and the purified air pipe 8 are all designed vertically, and the outer walls of the plurality of shunt pipes 12 are penetrated with a plurality of air outlet holes 801. When the air pump 6 draws the gas mixed with formaldehyde into the purified liquid in the purified barrel 5 through the purified air pipe 8, the gas in the purified air pipe 8 is dispersed through the plurality of shunt pipes 12, and is dispersed into fine airflows through the plurality of air outlet holes 801 again and diffused into the purified liquid, so that the gas is mixed more fully with the purified liquid in the purified barrel 5, and the purification effect of the purified liquid on formaldehyde in the mixed gas is greatly improved.

[0033] like Figure 8As shown, the plurality of gas outlet holes 801 are all located on the same side of the shunt pipe 12, and the gas outlet holes 801 opened on the plurality of shunt pipes 12 are all opened in a clockwise direction or in a counterclockwise direction at the same time. By setting the plurality of gas outlet holes 801 in the same direction, it is possible to avoid mixing of gases emitted from the gas outlet holes 801, thereby improving the mixing effect of the mixed gas and the purification liquid in the purification barrel 5 and improving the purification effect.

[0034] like Figure 8 As shown, the air outlet 801 is arranged obliquely toward the bottom of the purification barrel 5. The air outlet 801 is arranged obliquely downward so that the gas emitted from the air outlet 801 can be fully mixed with the purification liquid.

[0035] like Figure 1 - Figure 5 As shown, the tops of the two aldehyde absorption boxes 3 are fixedly connected and connected with a first connector 13, the ends of the two first connectors 13 away from the aldehyde absorption boxes 3 are both passed through the drying box 1, and the ends of the two aldehyde absorption tubes 7 away from the air pump 6 are respectively sleeved with two first connectors 13. The aldehyde absorption tube 7 is connected to the aldehyde absorption box 3 through the first connector 13, which is convenient for removing the aldehyde absorption tube 7 from the first connector 13 for replacement when it is damaged.

[0036] like Figure 1 - Figure 3 As shown, there are two air outlet pipes 9, and the two air outlet pipes 9 are respectively located at the two ends of the top of the drying box 4. Two air outlet pipes 9 are provided, and are respectively connected to the two ends of the drying box 4, so that the gas entering the drying chamber 401 in the drying box 4 is more uniform, so that the hot air flow blowing to the impregnated paper below is more stable and uniform, and the drying effect is improved.

[0037] like Figure 1 - Figure 8 As shown, both ends of the top of the drying box 4 are fixedly connected and connected with the second connector 14, and the two second connectors 14 both penetrate the top of the drying box 1, and both sides of the top of the purification barrel 5 are fixedly connected and connected with the connecting pipe 15, and the two ends of the two air outlet pipes 9 close to the drying box 4 are respectively sleeved with two second connectors 14, and the ends of the two air outlet pipes 9 away from the drying box 4 are respectively sleeved with two connecting pipes 15. The two ends of the air outlet pipe 9 are inserted into the second connector 14 and the connecting pipe 15, so as to connect the purification barrel 5 and the drying box 4, so as to facilitate the replacement of the air outlet pipe 9 when it is damaged, and further improve the applicability of the purification and formaldehyde removal device.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A formaldehyde removal device for an impregnated paper workshop, comprising a drying box (1), wherein a conveyor belt (2) for conveying impregnated paper is inserted through the bottom of the inner side of the drying box (1), and characterized in that: Two symmetrically arranged formaldehyde absorption boxes (3) are fixedly connected to the inner walls on both sides of the drying box (1). The two formaldehyde absorption boxes (3) are respectively located in front and behind the moving direction of the conveyor belt (2). The two formaldehyde absorption boxes (3) are provided with a formaldehyde absorption cavity (301) on the side close to the conveyor belt (2). A drying box (4) is fixedly connected to the top of the inner wall of the drying box (1). A drying cavity (401) is provided on the side close to the conveyor belt (2). A heating component is provided in the drying cavity (401). The drying box (4) is located between the two formaldehyde absorption boxes (3). A purification barrel (5) is fixedly connected to the middle position of the top outer wall of the drying box (1). The top of the purification barrel (5) is fixedly connected to The air pump (6) is connected to the air inlet end of the air pump (6), which is fixedly connected to and connected to two formaldehyde absorption tubes (7) through a three-way pipe. The other ends of the two formaldehyde absorption tubes (7) are respectively connected to the two formaldehyde absorption chambers (301). The air outlet end of the air pump (6) passes through the top of the purification barrel (5) and is fixedly connected to a purification air pipe (8). The purification air pipe (8) is connected to the air pump (6). The top of the purification barrel (5) is connected to an air outlet pipe (9). The other end of the air outlet pipe (9) is connected to a drying chamber (401) in the drying box (1). The bottom of one side of the purification barrel (5) is fixedly connected to and connected to a liquid exchange pipe (16). The outer wall of the liquid exchange pipe (16) is fixedly connected to a valve (17).

2. The formaldehyde removal device for an impregnated paper workshop according to claim 1, characterized in that: The heating assembly comprises a connecting frame (10) and a heating screen (11); the outer wall of the connecting frame (10) is fixedly connected to the inner wall of the drying chamber (401) close to one end of the conveyor belt (2); and the heating screen (11) is fixedly connected to the inner wall of the connecting frame (10).

3. The formaldehyde removal device for an impregnated paper workshop according to claim 1 or 2, characterized in that: The openings of the two formaldehyde absorption chambers (301) close to one end of the conveyor belt (2) are both arranged to be inclined in the direction of the drying box (4).

4. The formaldehyde removal device for an impregnated paper workshop according to claim 1 or 2, characterized in that: One end of the purified air pipe (8) away from the air pump (6) is fixedly connected to and communicates with a plurality of evenly distributed shunt pipes (12); the plurality of shunt pipes (12) and the purified air pipe (8) are designed to be vertical; and the outer walls of the plurality of shunt pipes (12) are penetrated by a plurality of air outlet holes (801).

5. The formaldehyde removal device for an impregnated paper workshop according to claim 4, characterized in that: The plurality of air outlet holes (801) are all located on the same side of the shunt pipe (12), and the air outlet holes (801) provided on the plurality of shunt pipes (12) are all simultaneously oriented in the clockwise direction or simultaneously oriented in the counterclockwise direction.

6. The formaldehyde removal device for an impregnated paper workshop according to claim 4, characterized in that: The air outlet hole (801) is arranged obliquely toward the bottom of the purification barrel (5).

7. The formaldehyde removal device for an impregnated paper workshop according to claim 1, 2, 5 or 6, characterized in that: The tops of the two formaldehyde absorption boxes (3) are fixedly connected and communicated with a first connector (13); the ends of the two first connectors (13) away from the formaldehyde absorption boxes (3) pass through the drying box (1); and the ends of the two formaldehyde absorption tubes (7) away from the air pump (6) are respectively sleeved with the two first connectors (13).

8. The formaldehyde removal device for an impregnated paper workshop according to claim 1, 2, 5 or 6, characterized in that: The number of the air outlet pipes (9) is two, and the two air outlet pipes (9) are respectively located at two ends of the top of the drying box (4).

9. The formaldehyde removal device for an impregnated paper workshop according to claim 8, characterized in that: Both ends of the top of the drying box (4) are fixedly connected and communicated with second connectors (14), and the two second connectors (14) both penetrate the top of the drying box (1). Both sides of the top of the purification barrel (5) are fixedly connected and communicated with connecting pipes (15). The ends of the two air outlet pipes (9) close to the drying box (4) are respectively sleeved with two second connectors (14), and the ends of the two air outlet pipes (9) away from the drying box (4) are respectively sleeved with two connecting pipes (15).

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