A paper machine wet end mist elimination system

Abstract

This utility model discloses a wet-end defogging system for a papermaking machine, including a defogging hood, a defogging device installed inside the defogging hood, and a defogging exhaust pipe assembly connected to the defogging device. The defogging device comprises several assembled defogging modules. Each defogging module includes a support frame, several defogging hoods mounted on the support frame, and several defogging branch pipes respectively connected to the defogging hoods. The defogging branch pipes are respectively connected to the defogging exhaust pipe assembly. Each defogging module is connected to adjacent defogging modules via a locking mechanism. This utility model is easy to assemble and disassemble, and the number and installation spacing of the defogging modules can be distributed according to the water mist concentration inside the defogging hood, quickly reducing the humidity inside the defogging hood and improving the working environment inside the workshop.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, specifically to a wet end demisting system for a papermaking machine. Background Technology

[0002] The papermaking process generates a large amount of water vapor, which diffuses into the workshop, accumulates, reduces visibility, and increases temperature, creating a sauna-like environment for workers. This negatively impacts work efficiency and poses significant safety hazards. To address these issues, existing technologies add defogging devices to the dehumidification zone, using negative pressure from multiple suction ports to remove the mist. Chinese invention patent CN118581757A discloses a white fog removal system for papermaking dust covers. This system uses a dehumidification system to remove water vapor while simultaneously supplying heated air to the sealed cover via a hot air system, thereby reducing the relative humidity inside the cover. However, the dehumidification efficiency of this system is limited by the size and location of the suction ports. Furthermore, the hot air system increases energy consumption, and the system cannot be disassembled in parts, hindering the replacement and maintenance of papermaking equipment. Therefore, to avoid the shortcomings of existing technologies, improvements are necessary. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide a paper machine wet end demisting system that is easy to assemble and disassemble and has high demisting efficiency.

[0004] This utility model is achieved through the following technical solution: a paper machine wet end defogging system, including a defogging hood, a defogging device installed inside the defogging hood, and a defogging pipe assembly connected to the defogging device. The defogging device includes several defogging modules assembled together. Each defogging module includes a support, several defogging hoods installed on the support, and several defogging branch pipes respectively connected to the several defogging hoods. The several defogging branch pipes are respectively connected to the defogging pipe assembly. The defogging module is connected to adjacent defogging modules through a locking mechanism.

[0005] Furthermore, the fog-absorbing device is also equipped with a base frame, and the fog-absorbing module is installed on the base frame. The fog-absorbing module and the base frame are connected by quick-connect screws.

[0006] Furthermore, the bracket is equipped with lifting lugs.

[0007] Furthermore, the locking mechanism includes a lock seat, a lock buckle, a lock hook, and a lock handle. The lock seat and the lock buckle are respectively installed on adjacent mist-absorbing modules, the lock hook is snapped onto the lock buckle, and the lock handle is hinged to the lock seat and the lock hook respectively.

[0008] Furthermore, the mist suction device is also equipped with a cleaning mechanism, which includes a cleaning water pipe installed in the mist suction branch pipe, cleaning nozzles evenly distributed on the cleaning water pipe, and a solenoid valve located at the water inlet end of the cleaning water pipe.

[0009] Furthermore, the fog-absorbing hood has an elongated fog-absorbing opening.

[0010] Furthermore, a cleaning door is provided at the end of the mist-absorbing branch pipe.

[0011] Furthermore, the mist exhaust pipe assembly includes a plurality of mist exhaust branch pipes and a mist exhaust main pipe connected to the plurality of mist exhaust branch pipes, wherein the mist exhaust branch pipes are respectively connected to the mist intake branch pipes.

[0012] Furthermore, the exhaust branch pipe is connected to the adjacent exhaust branch pipe via a quick-connect flange.

[0013] Furthermore, the paper machine wet end demisting system also includes a steam-water separator and a fan, with the air inlet of the fan connected in sequence to the exhaust end of the steam-water separator and the demisting pipe assembly.

[0014] Compared with existing technologies, this utility model improves fog absorption efficiency by adjusting the position and density of the fog absorption modules, improves the working environment in the workshop, and extends the service life of the equipment in the workshop. The locking mechanism enables quick disassembly and assembly of local fog absorption modules, which facilitates the maintenance and replacement of paper machines in the workshop and avoids the need to dismantle the entire defogging system when maintaining equipment in the workshop, thus improving maintenance and replacement efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structural principle of the wet end demisting system of the papermaking machine of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the mist suction device and mist exhaust pipe assembly of the wet end demisting system of the papermaking machine of this utility model.

[0018] Figure 3 This is an exploded view of the structure of the mist suction device and mist exhaust pipe assembly of the wet end demisting system of the papermaking machine of this utility model.

[0019] Figure 4 for Figure 2 Enlarged schematic diagram of part A.

[0020] Figure 5 This is an exploded view of the mist-absorbing module of the wet end demisting system for a paper machine according to this utility model.

[0021] Figure 6 This is a schematic diagram of the locking mechanism of the wet end demisting system of the papermaking machine of this utility model.

[0022] In the diagram: 1-Anti-fog hood; 2-Fog suction device; 3-Fog exhaust pipe assembly; 4-Fog suction module; 5-Bracket; 6-Fog suction hood; 7-Fog suction branch pipe; 8-Locking mechanism; 9-Base frame; 10-Quick-connect screw; 11-Lifting lug; 12-Locking seat; 13-Locking; 14-Locking hook; 15-Locking handle; 16-Cleaning mechanism; 17-Cleaning water pipe; 18-Cleaning nozzle; 19-Solenoid valve; 20-Cleaning door; 21-Fog exhaust branch pipe; 22-Fog exhaust main pipe; 23-Quick-opening connecting flange; 24-Air-water separator; 25-Fan. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 6 The present invention discloses a wet-end defogging system for a paper machine, comprising a defogging hood 1, a defogging device 2 installed inside the defogging hood 1, and a defogging pipe assembly 3 connected to the defogging device 2. The defogging device 2 includes several defogging modules 4 assembled together. Each defogging module 4 includes a support 5, several defogging hoods 6 installed on the support 5, and several defogging branch pipes 7 connected to the defogging hoods 6. The defogging branch pipes 7 are connected to the defogging pipe assembly 3. Each defogging module 4 is connected to an adjacent defogging module 4 via a locking mechanism 8. This invention can rationally distribute the positions of the defogging modules 4 according to the internal water mist concentration distribution and gas flow field simulation, thereby improving defogging efficiency. In areas with high water mist concentration, i.e., the area approximately 5 meters from the drying cylinder to the return roll, the water mist concentration is highest, and the defogging modules 4 are concentrated in this area. In areas with low water mist concentration, i.e., the area further away from the return roll to the rear of the defogging hood 1, the water mist gradually decreases, and the defogging modules 4 are spaced further apart. The number and spacing of the fog suction hoods 6 on the fog suction module 4 can also be adjusted.

[0025] This utility model adopts a disassembly and assembly method for the top module as a whole assembly. Individual mist-absorbing modules 4 can be disassembled through the locking mechanism 8, which facilitates the maintenance or replacement of the equipment under the individual mist-absorbing modules 4.

[0026] The fog suction device 2 is also equipped with a base frame 9, and the fog suction module 4 is installed on the base frame 9. The fog suction module 4 and the base frame 9 are connected by quick-connect screws 10, which makes disassembly and assembly simple.

[0027] The bracket 5 is equipped with lifting lugs 11. The mist suction module 4 can be lifted off using the lifting lugs 11, and then the equipment under the mist suction module 4 can be lifted out for replacement or repair.

[0028] The locking mechanism 8 includes a lock base 12, a lock latch 13, a lock hook 14, and a lock handle 15. The lock base 12 and the lock latch 13 are respectively installed on adjacent mist-absorbing modules 4. The lock hook 14 is snapped onto the lock latch 13. The lock handle 15 is hinged to both the lock base 12 and the lock hook 14. The locking mechanism 8 has a simple structure and is convenient to open and close.

[0029] The mist suction device 2 is also equipped with a cleaning mechanism 16, which includes a cleaning water pipe 17 installed in the mist suction branch pipe 7, cleaning nozzles 18 evenly distributed on the cleaning water pipe 17, and a solenoid valve 19 located at the water inlet of the cleaning water pipe 17. Each mist suction branch pipe 7 has multiple cleaning nozzles 18 in its cleaning water pipe 17. When the machine is stopped for cleaning, the solenoid valve 19 is opened to start the water pump for cleaning. Through the automatic control system, cleaning can be performed sequentially or simultaneously.

[0030] The end of the mist suction branch pipe 7 is equipped with a cleaning door 20, which facilitates the cleaning and maintenance of the mist suction branch pipe 7.

[0031] The fog-absorbing hood 6 features an elongated fog-absorbing opening. To increase the fog-absorbing range and improve fog-absorbing efficiency, the fog-absorbing hood includes a hood body, which comprises two vertically arranged side plates and guide plates extending downwards and outwards from the bottom ends of the side plates. The side plates form an elongated fog-absorbing opening, and the guide plates form an elongated guide opening. The elongated fog-absorbing opening expands the fog-absorbing range, and the elongated guide opening gradually expands to both sides, reducing the resistance of fog entering the elongated fog-absorbing opening, resulting in more uniform suction and better fog-absorbing effect.

[0032] The mist exhaust pipe assembly 3 includes several mist exhaust branch pipes 21 and a main mist exhaust pipe 22 connected to the several mist exhaust branch pipes 21. The mist exhaust branch pipes 21 are respectively connected to the mist intake branch pipes 7. The mist exhaust branch pipes 21 are connected to adjacent mist exhaust branch pipes 21 by quick-release connecting flanges 23, which is convenient for disassembly and assembly. Of course, as needed, several main mist exhaust pipes 22 can be included, and adjacent main mist exhaust pipes 22 are also connected by quick-release connecting flanges 23, which is convenient for assembly.

[0033] During disassembly and assembly, in addition to unlocking the locking mechanism 8 between adjacent mist-absorbing modules 4, the quick-opening connecting flange 23 between adjacent mist-exhausting branch pipes 21 must also be opened, and the quick-connect screw 10 must also be opened to allow the mist-absorbing module 4 to detach from the base frame 9. Finally, the mist-absorbing module 4 and the mist-exhausting branch pipe 21 can be lifted away by the lifting lug 11.

[0034] The wet end demisting system of the paper machine also includes a steam-water separator 24 and a fan 25. The air inlet of the fan 25 is connected in sequence to the exhaust end of the steam-water separator 24 and the demisting pipe assembly 3.

[0035] The negative pressure of the fan 25 draws out the fog from the anti-fog cover 1. The fog then enters the steam-water separator 24 through the mist exhaust pipe assembly 3, and is discharged after the white fog is eliminated.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A paper machine wet end de-misting system characterized by: The device includes an anti-fog hood, a fog-absorbing device installed inside the anti-fog hood, and a fog-exhausting pipe assembly connected to the fog-absorbing device. The fog-absorbing device includes several fog-absorbing modules assembled together. Each fog-absorbing module includes a bracket, several fog-absorbing hoods installed on the bracket, and several fog-absorbing branch pipes respectively connected to the several fog-absorbing hoods. The several fog-absorbing branch pipes are respectively connected to the fog-exhausting pipe assembly. The fog-absorbing modules are connected to adjacent fog-absorbing modules through a locking mechanism.

2. The papermaking machine wet-end demisting system of claim 1, wherein: The fog-absorbing device is also equipped with a base frame, and the fog-absorbing module is installed on the base frame. The fog-absorbing module and the base frame are connected by quick-connect screws.

3. The papermaking machine wet-end demisting system of claim 1, wherein: The support frame is equipped with lifting lugs.

4. The papermaking machine wet-end demisting system of claim 1, wherein: The locking mechanism includes a lock base, a lock buckle, a lock hook, and a lock handle. The lock base and the lock buckle are respectively installed on adjacent mist-absorbing modules. The lock hook is snapped onto the lock buckle. The lock handle is hinged to the lock base and the lock hook respectively.

5. The paper machine wet end demisting system according to claim 1, characterized in that: The mist suction device is also equipped with a cleaning mechanism, which includes a cleaning water pipe installed in the mist suction branch pipe, cleaning nozzles evenly distributed on the cleaning water pipe, and a solenoid valve located at the water inlet end of the cleaning water pipe.

6. The paper machine wet end demisting system according to claim 1, characterized in that: The fog-absorbing hood has a long, narrow fog-absorbing opening.

7. The paper machine wet end demisting system according to claim 1, characterized in that: The end of the mist suction branch pipe is equipped with a cleaning door.

8. The paper machine wet end demisting system according to claim 1, characterized in that: The mist exhaust pipe assembly includes several mist exhaust branch pipes and a mist exhaust main pipe connected to the several mist exhaust branch pipes, and the mist exhaust branch pipes are respectively connected to the mist intake branch pipes.

9. The paper machine wet end demisting system according to claim 8, characterized in that: The exhaust branch pipe is connected to the adjacent exhaust branch pipe via a quick-opening flange.

10. The paper machine wet end demisting system according to claim 1, characterized in that: The paper machine wet end demisting system also includes a steam-water separator and a fan, with the air inlet of the fan connected in sequence to the exhaust end of the steam-water separator and the demisting pipe assembly.

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