Suction hood device for furnace mouth of wide carbonization furnace

Abstract

A suction hood device for a wide carbonization furnace mouth mainly comprises a secondary fine filter screen, a suction hood shell, a first mounting angle steel, a second mounting angle steel, a primary preliminary filter screen, a front coaming, a rear coaming, a side coaming, a first supporting bent plate and a second supporting bent plate. The air suction hood shell is fixedly installed on a carbonization furnace mouth air suction hood support through the first installation angle steel and the second installation angle steel, the secondary fine filter screen is installed on the top of the air suction hood shell, and the front coaming, the rear coaming and the side coaming are installed on the periphery of the lower portion of the air suction hood shell through screws. And the primary preliminary filter screen is mounted on the front wall plate and is fixed by using screws. The device effectively absorbs impurities such as waste silk batting carried by carbon fibers before the carbon fibers enter the carbonization furnace, the requirements of waste gas absorption and waste silk filtration at the furnace mouth of the wide carbonization furnace in carbon fiber production are well met by arranging the double air suction ports and the two-stage filtration structure, and the structure is detachable, so that the device is simple and convenient to operate and easy to maintain.

Description

Technical Field

[0001] The utility model relates to auxiliary equipment of a low-temperature carbonization furnace and a high-temperature carbonization furnace for carbon fiber production, in particular to an air suction hood device for a wide carbonization furnace mouth. Background Art

[0002] During the production process, before the carbon fiber tows enter the carbonization furnace, waste fibers and filaments are often mixed between the tows. At the same time, the carbonization furnace mouth sealing device discharges waste gas to the outside. It is necessary to set an air suction hood at the furnace mouth to absorb the messy filaments and discharge the waste gas.

[0003] At present, 4-meter wide low-temperature carbonization furnaces and high-temperature carbonization furnaces are not widely used in domestic carbon fiber production lines. The corresponding suction hood devices are in urgent need of technical improvement and updating to meet the production needs of wide-width carbonization furnaces.

[0004] After testing in production practice, the existing suction hood device for the carbonization furnace mouth has the following shortcomings: First, the suction hood is only equipped with a filter at the outlet of the upper shell, which causes the waste hair that has been blocked by the filter for a long time to gather into a ball, and fall onto the normally operating carbon fiber bundle due to its own weight, and are brought into the carbonization furnace together, seriously affecting normal production. Second, most of the existing suction hoods have a single air outlet, which will cause the air flow speed in the middle to be significantly greater than that on both sides at the wide carbonization furnace mouth, resulting in poor removal of waste gas and waste fibers on both sides. Third, the existing suction hood structure is a thin plate integrally welded, which cannot be separated and disassembled, making it difficult to repair and inconvenient to operate. Summary of the invention

[0005] The technical problem to be solved by the utility model is to address the deficiencies in the prior art and to propose an air suction hood device for a wide carbonization furnace mouth that effectively filters and collects waste silk that is aggregated into a mass and has a more uniform and stable air flow.

[0006] The technical problem to be solved by the utility model is achieved through the following technical solutions, a suction hood device for a wide carbonization furnace mouth, which is characterized by:

[0007] It includes an air suction hood shell, an air collecting frame, a primary preliminary filter and a secondary fine filter;

[0008] The air collecting frame is arranged around the furnace opening of the wide carbonization furnace, and the primary primary filter is arranged at the upper part of the air collecting frame near the upper opening of the air collecting frame;

[0009] At least two groups of air suction hood shells are arranged above the air collecting frame along the length direction of the wide carbonization furnace mouth, the air suction hood shells are in a cone shape, the large ports of the air suction hood shells are downward, and the large ports between the groups of air suction hood shells are connected as a whole and sealed to the air collecting frame;

[0010] The secondary fine filter is installed at the small port of the air hood shell.

[0011] The technical problem to be solved by the utility model can be further achieved through the following technical solution: the air suction hood shell is fixed to the air suction hood bracket at the carbonization furnace mouth through the mounting angle steel at the edge.

[0012] The technical problem to be solved by the utility model can also be further achieved through the following technical solution: the air collecting frame is assembled together by a front panel, a rear panel and side panels in a detachable manner through screws.

[0013] The technical problem to be solved by the utility model can be further achieved through the following technical scheme, wherein multiple groups of the first-level preliminary filter screens are arranged along the length direction of the wind collecting frame, a first-level preliminary filter screen support frame is provided in the wind collecting frame, and the first-level preliminary filter screen is placed on the support frame and connected to the front panel.

[0014] The technical problem to be solved by the present invention can also be further achieved through the following technical scheme, the support frame includes a transverse support bending plate 1 and a longitudinal support bending plate 2, the transverse support bending plate 1 is installed on the rear panel using screws, and the longitudinal support bending plate 2 is installed between the front panel and the rear panel using screws.

[0015] Compared with the prior art, the utility model redesigns an air suction hood device for a wide carbonization furnace mouth in view of the use requirements of the wide carbonization furnace to meet the production needs.

[0016] 1. The wide carbonization furnace mouth suction hood device effectively filters and collects the waste silk that is gathered into a mass by setting a two-stage filter screen in the gas flow field, thereby greatly reducing the adverse effect of the waste silk on the normal carbonization process.

[0017] 2. The wide carbonization furnace mouth air suction hood device has double air outlets arranged on the top of the air suction hood shell, so that the fluid inside the shell is more uniform and stable in the width direction, which is beneficial to the carbonization furnace mouth exhaust gas absorption and emission and waste silk absorption and filtration.

[0018] 3. The wide carbonization furnace mouth suction hood device adopts modular split design, and each component is installed and fastened by screws, so that the installation and maintenance are simple, safe and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a simplified structural diagram of the utility model;

[0020] Figure 2 for Figure 1 A-A view;

[0021] Figure 3 for Figure 2 The enlarged view of point Ⅰ;

[0022] Figure 4 for Figure 2 Enlarged view of point II. 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 of 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] Example: Figure 1 A wide carbonization furnace mouth air suction hood device mainly includes a secondary fine filter 1, an air suction hood shell 2, a mounting angle steel 1 3, a mounting angle steel 2 4, a primary preliminary filter 5, a front panel 6, a rear panel 7, a side panel 8, a support bending plate 1 9, and a support bending plate 2 10. The air suction hood shell 2 is fixed to the carbonization furnace mouth air suction hood bracket by mounting angle steel 1 3 and mounting angle steel 2 4, the secondary fine filter 1 is installed on the top of the air suction hood shell 2 by screws, the front panel 6, the rear panel 7 and the side panel 8 are installed around the bottom of the air suction hood shell 2 by screws, the primary preliminary filter 5 is installed on the front panel 6, supported by the support bending plate 1 9 and the support bending plate 2 10, and fixed with screws.

[0025] In this embodiment, the air hood shell is provided with two groups of two air outlets, and a secondary fine filter installation structure is welded at the air outlet. The secondary fine filter has a small mesh and is installed on the upper part of the air hood shell by screws.

[0026] The first-level filter screen has relatively large meshes and is available in multiple pieces.

[0027] The first-level preliminary filter screens are arranged in multiple groups along the length direction of the wind collecting frame, and a first-level preliminary filter screen support frame is arranged in the wind collecting frame. The first-level preliminary filter screens are placed on the support frame and connected to the front panel.

[0028] The support frame includes a transverse support bending plate 1 and a longitudinal support bending plate 2. The transverse support bending plate 1 is installed on the rear panel using screws, and the longitudinal support bending plate 2 is installed between the front panel and the rear panel using screws.

[0029] The double-layer filter effectively filters and accepts waste fibers of various sizes carried by carbon fiber tow during operation, meeting the requirements of on-site use

[0030] Working principle: When the suction hood device for the wide carbonization furnace mouth works normally, the external ventilation pipeline is connected to the two air outlets above the suction hood, the external fan is pneumatic, and an upward airflow is generated inside the suction hood shell 2. The overflow sealing gas from the furnace mouth is sucked out, and at the same time, the upward airflow passes the fine hair carried by the carbon fiber tow through the primary preliminary filter 5 to the secondary fine filter 1, and is blocked by the filter. As the operation time of the carbonization furnace increases, the hair blocked by the secondary fine filter 1 gathers into a ball under the airflow, and has a certain size. It falls due to its own weight and is received and collected by the primary preliminary filter 5. The primary preliminary filter is connected to the front panel and can be easily pulled out. Maintenance personnel regularly clean the primary preliminary filter 5 and the secondary fine filter 1 to realize the normal cleaning of exhaust gas and waste silk at the mouth of the wide carbonization furnace, providing a prerequisite for the normal, stable and efficient operation of the carbonization furnace.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air suction hood device for a wide carbonization furnace, characterized in that: It includes an air suction hood shell, an air collecting frame, a primary preliminary filter and a secondary fine filter; The air collecting frame is arranged around the furnace opening of the wide carbonization furnace, and the primary primary filter is arranged at the upper part of the air collecting frame near the upper opening of the air collecting frame; At least two groups of air suction hood shells are arranged above the air collecting frame along the length direction of the wide carbonization furnace mouth, the air suction hood shells are in a cone shape, the large ports of the air suction hood shells are downward, and the large ports between the groups of air suction hood shells are connected as a whole and sealed to the air collecting frame; The secondary fine filter is installed at the small port of the air hood shell.

2. The air suction hood device for a wide carbonization furnace according to claim 1, characterized in that: The air suction hood shell is fixed on the air suction hood bracket at the furnace mouth of the carbonization furnace through the mounting angle steel at the edge.

3. The air suction hood device for a wide carbonization furnace according to claim 1, characterized in that: The air collecting frame is assembled together by a front panel, a rear panel and side panels in a detachable manner through screws.

4. The air suction hood device for a wide carbonization furnace according to claim 3, characterized in that: The first-level preliminary filter screens are arranged in multiple groups along the length direction of the wind collecting frame, and a first-level preliminary filter screen support frame is arranged in the wind collecting frame. The first-level preliminary filter screens are placed on the support frame and connected to the front panel.

5. The suction hood device for a wide carbonization furnace according to claim 4, characterized in that: The support frame includes a transverse support bending plate 1 and a longitudinal support bending plate 2. The transverse support bending plate 1 is installed on the rear panel using screws, and the longitudinal support bending plate 2 is installed between the front panel and the rear panel using screws.

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