Refined cotton defibering and dedusting device and nitrocotton preparation system

Abstract

The utility model relates to the technical field of refined cotton processing devices, and discloses a refined cotton defibering and dust removing device and a nitrocotton preparation system. The refined cotton defibering and dust removing device comprises a rotary dust filter, the rotary dust filter comprises a shell, a fiber distributor and a dust filtering cage arranged in the shell, and a spiral belt distributed spirally is arranged in the dust filtering cage; when the refined cotton is subjected to dust removal, the defibered refined cotton enters from the material receiving opening, is dispersed into the dust filtering cage through the discharging opening and is conveyed to the discharging opening along the spiral belt, and in the conveying process, impurities and tiny dust in the refined cotton enter the dust collecting cavity through the net plate holes, so that the dust removal effect is enhanced. The utility model further discloses a nitrocotton preparation system, refined cotton sequentially passes through the belt conveyor, the refined cotton fluffer, the rotary dust filter, the rotary twisting roller, the air seal machine, the spiral conveyor, the acid spraying device, the esterification machine and the centrifugal machine, nitrocotton is obtained, fine impurities and tiny dust of the refined cotton are continuously and automatically removed, and application requirements are met.

Description

Technical Field

[0001] This utility model relates to the technical field of refined cotton processing equipment, and in particular to a refined cotton dust removal device and a nitrocellulose preparation system. Background Technology

[0002] Cellulose is a refined cotton product mainly made from cotton linters through cooking. It has wide applications in food processing, pharmaceutical manufacturing, daily chemical products, building materials, explosives, and other related fields. Nitrocellulose, on the other hand, is a product obtained by esterification of refined cotton with a mixture of nitric and sulfuric acids. It is widely used in explosives, inks, coatings, and films. In the traditional process of preparing nitrocellulose, the textile industry uses a type of short linter, whose fibers are longer and have not been refined and cooked, resulting in a significant difference in morphology from refined cotton. Existing dust removal equipment in the textile industry cannot meet the dust removal requirements of refined cotton. Generally, after being shredded, refined cotton is conveyed to a cyclone separator via airflow, relying on the cyclone separator to discharge the refined cotton dust and exhaust gas. Due to the poor dust removal effect of the cyclone separator, a large amount of dust enters the esterification machine, which can easily cause fiber accumulation in the mixed acid and decomposition accidents during storage and preparation, affecting the quality of nitrocellulose products.

[0003] Therefore, there is an urgent need to provide a refined cotton dust removal device and a nitrocellulose preparation system to solve the above problems. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a refined cotton dust removal device and a nitrocellulose preparation system, which has excellent dust removal effect and produces nitrocellulose products that meet application requirements.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A refined cotton dust removal device includes a rotary dust filter, the rotary dust filter including a housing, a fiber distributor and a filter dust cage disposed in the housing, the filter dust cage being provided with spirally distributed spiral ribbons;

[0007] The top of the housing has an installation port, and the bottom of the housing has a discharge port;

[0008] The dust filter cage is rotatably disposed inside the housing with the height direction of the housing as the axis of rotation. The top of the dust filter cage is provided with a first opening, which is positioned opposite the mounting port. The bottom of the dust filter cage is provided with a second opening, which is connected to the discharge port. Multiple mesh plate holes are provided on the side wall of the dust filter cage. A dust collection chamber is formed between the peripheral wall of the housing and the side wall of the dust filter cage.

[0009] The fiber distributor is rotatably mounted at the mounting port with the height direction of the housing as the axis of rotation. The fiber distributor has a receiving port and a discharging port. The receiving port is used to receive the refined cotton after it has been loosened, and the discharging port is used to output the refined cotton after it has been loosened. The discharging port is located inside the first opening.

[0010] During the dust removal process of refined cotton, the loosened refined cotton enters from the receiving port and is dispersed into the filter dust cage through the discharge port. The refined cotton is then conveyed to the discharge port along the screw conveyor. During the conveying process, impurities and micro-dust in the refined cotton enter the dust collection chamber through the mesh plate holes.

[0011] As a preferred embodiment of a refined cotton dust removal device, the cross-sectional area of ​​the filter dust cage gradually decreases from the first opening to the second opening.

[0012] As a preferred embodiment of a refined cotton dust removal device, the rotary dust filter further includes a first driving member, which is disposed on the housing and is driven to be connected to the fiber distributor for driving the fiber distributor to rotate.

[0013] As a preferred embodiment of a refined cotton dust removal device, the plane where the discharge port is located forms an inclined angle with the height direction of the housing, and the angle ranges from 15° to 30°.

[0014] As a preferred embodiment of a refined cotton dust removal device, the rotary dust filter further includes a second driving member, which is disposed on the housing and is driven to be connected to the filter dust cage for driving the filter dust cage to rotate.

[0015] As a preferred embodiment of a dust removal device for refined cotton, it also includes an induced draft fan and a dust removal unit. The induced draft fan has a dust inlet and a dust outlet. A dust collection port is provided on the housing. The dust collection port is connected to the dust inlet, and the dust removal unit is connected to the dust outlet.

[0016] As a preferred embodiment of a refined cotton dust removal device, the dust collection port is located on the side wall of the housing and adjacent to the second opening.

[0017] As a preferred embodiment of a refined cotton dust removal device, it also includes a rotating roller, wherein the feed inlet is connected to an outlet section, and the rotating roller is rotatably installed within the outlet section.

[0018] As a preferred embodiment of a refined cotton dust removal device, it further includes an airlock and a screw conveyor connected in sequence. The airlock includes a third opening and a fourth opening. The third opening is connected to the outlet section, and the fourth opening is connected to the inlet end of the screw conveyor.

[0019] A nitrocellulose preparation system includes a belt conveyor, a refined cotton unwinding machine, a dust removal device for the refined cotton unwinding machine, an acid spraying device, an esterification machine, and a centrifuge connected in sequence.

[0020] The belt conveyor is used to transport the refined cotton;

[0021] The refined cotton decanter is used to decan the refined cotton;

[0022] The refined cotton dust removal device is used to disperse and filter impurities and dust in the refined cotton;

[0023] The acid spraying device is used to spray acid to impregnate and remove the impurities and dust from the refined cotton.

[0024] The esterification machine is used to carry out an esterification reaction on the refined cotton that has been sprayed with acid and impregnated.

[0025] The centrifuge is used to remove the liquid from the surface of the refined cotton after the esterification reaction, thereby obtaining nitrocellulose.

[0026] The beneficial effects of this utility model are as follows:

[0027] This utility model provides a refined cotton dust removal device, which includes a rotary dust filter. The rotary dust filter includes a housing, a fiber distributor, and a filter dust cage disposed within the housing. The filter dust cage contains a spirally distributed screw ribbon. During refined cotton dust removal, the loosened refined cotton enters the fiber distributor from the inlet and then enters the filter dust cage from the outlet. The refined cotton is conveyed along the screw ribbon to the discharge outlet. During this conveying process, impurities and micro-dust in the refined cotton enter the dust collection chamber through the mesh openings. Because the fiber distributor is partially rotatably positioned at the installation port, its rotation ensures that the refined cotton is evenly distributed onto the filter dust cage. Furthermore, because the filter dust cage is rotatably positioned within the housing, its rotation allows impurities and micro-dust in the refined cotton to enter the dust collection chamber through the mesh openings under centrifugal force and negative pressure, resulting in excellent dust removal performance. Additionally, the screw ribbon conveyor prevents the refined cotton from being conveyed solely to the second opening under gravity, thus avoiding blockage and improving conveying efficiency.

[0028] This invention also provides a nitrocellulose preparation system, which removes impurities and micro-dust from refined cotton through a refined cotton decontamination and dust removal device to obtain nitrocellulose. This system achieves continuous and automated removal of fine impurities and micro-dust from refined cotton, reduces labor costs, eliminates safety hazards caused by the decomposition of fine impurities and micro-dust in the acid spraying device and esterification machine, and prevents light foreign matter such as dust and fine impurities from entering the acid spraying device and being soaked in acid for a long time, which would cause swelling and hydrolysis and affect the solubility quality indicators of the nitrocellulose product. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the rotary dust filter provided in this embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the structure of the nitrocellulose preparation system provided in this embodiment of the utility model;

[0032] Figure 3 This is a side view of the filter dust cage provided in an embodiment of this utility model.

[0033] In the picture:

[0034] 1. Rotary dust filter; 11. Housing; 111. Dust collection port; 12. Dust filter cage; 121. Mesh plate holes; 122. First opening; 123. Second opening; 13. Screw ribbon; 14. Fiber distributor; 141. Material receiving port; 142. Material discharge port; 15. First driving component; 16. Second driving component;

[0035] 2. Exhaust fan; 21. Dust outlet; 3. Rotary roller; 4. Airlock; 5. Screw conveyor; 6. Belt conveyor; 7. Refined cotton desiccant; 8. Acid spraying device; 9. Esterification machine. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0040] like Figures 1 to 3As shown, this embodiment provides a refined cotton desiccant dust removal device, which includes a rotary dust filter 1. The rotary dust filter 1 includes a housing 11, a fiber distributor 14, and a filter dust cage 12 disposed within the housing 11. A spirally distributed screw ribbon 13 is disposed within the filter dust cage 12. An installation port is provided at the top of the housing 11, and a discharge port is provided at the bottom of the housing 11. The filter dust cage 12 is rotatably disposed within the housing 11 about the height direction of the housing 11 as its rotation axis. A first opening 122 is provided at the top of the filter dust cage 12, opposite to the installation port. A second opening 123 is provided at the bottom of the filter dust cage 12, communicating with the discharge port. A section is provided on the side wall of the filter dust cage 12. The housing 11 has multiple mesh holes 121, and a dust collection chamber is formed between the peripheral wall of the housing 11 and the side wall of the filter dust cage 12. The fiber distributor 14 is rotatably mounted at the installation port with the height direction of the housing 11 as the axis of rotation. The fiber distributor 14 has a receiving port 141 and a discharging port 142. The receiving port 141 is used to receive the refined cotton after it has been loosened, and the discharging port 142 is used to output the refined cotton after it has been loosened. The discharging port 142 is located inside the first opening 122. The refined cotton after it has been loosened enters the fiber distributor 14 from the receiving port 141 and then enters the filter dust cage 12 from the discharging port 142. The refined cotton is conveyed to the discharge port along the screw belt 13. During the conveying process, impurities and dust in the refined cotton enter the dust collection chamber through the mesh holes 121. Because the fiber distributor 14 is partially rotatably mounted at the installation port, the rotation of the fiber distributor 14 ensures that the refined cotton is evenly dispersed onto the filter dust cage 12. Because the filter dust cage 12 is rotatably mounted inside the housing 11, the rotation of the filter dust cage 12 causes impurities and dust particles in the refined cotton to enter the dust collection chamber through the mesh holes 121 under the action of centrifugal force and negative pressure, resulting in excellent dust removal effect for the refined cotton. In addition, by setting the screw belt 13 to rotate and transport the dust-removed refined cotton, it is prevented that the refined cotton is transported to the second opening 123 under the action of gravity alone, which would cause the refined cotton to become clogged, thus improving the conveying efficiency.

[0041] Specifically, the fiber distributor 14 includes a straight pipe and a curved pipe connected together. The end of the straight pipe opposite to the curved pipe is the receiving port 141, and the end of the curved pipe opposite to the straight pipe is the discharge port 142. The curved pipe allows the refined cotton output from the discharge port 142 to be dispersed and sprayed onto the filter dust cage 12 in a circumferential direction, thereby improving the dispersion of the refined cotton.

[0042] More specifically, the plane of the discharge port 142 forms an inclined angle with the height direction of the shell 11, with the angle ranging from 15° to 30°, preferably 30°, and determined according to the actual situation. Setting this angle facilitates the uniform and high-speed spraying of refined cotton onto the filter dust cage 12. When the angle is set too large, the refined cotton cannot be sprayed to the top part of the filter dust cage 12, resulting in an empty top part of the filter dust cage and reducing the dust removal efficiency; when the angle is set too small, the refined cotton is only sprayed to the top part of the filter dust cage 12, the spraying area is too limited, and the dust removal effect is poor.

[0043] Furthermore, the rotary dust filter 1 also includes a first driving component 15, which is disposed on the housing 11 and is driven and connected to the fiber distributor 14 to drive the fiber distributor 14 to rotate. In this embodiment, the first driving component 15 includes a motor, which drives the rotating gear to rotate, thereby causing the fiber distributor 14 to rotate about the height direction of the housing 11 as the rotation axis. The refined cotton fed from the receiving port 141 is output from the discharge port 142 under the action of rotation and is evenly dispersed on the filter dust cage 12, which facilitates the dispersion of refined cotton and enhances the dust removal effect. In other embodiments, the first driving component 15 may be configured with other structures, which are determined according to the actual situation.

[0044] Preferably, the fiber distributor 14 can rotate 360°, and the rotation speed of the fiber distributor 14 is 10-25 m / s, preferably 15 m / s, depending on the actual situation. The refined cotton is sprayed evenly and at high speed onto the filter dust cage 12. By controlling the rotation speed of the fiber distributor 14, the movement of the refined cotton is made smoother, the flow rate is greater, and the distribution area is more uniform.

[0045] Specifically, the rotary dust filter 1 further includes a second driving component 16, which is disposed on the housing 11 and is driven to connect to the dust filter cage 12 for driving the dust filter cage 12 to rotate. In this embodiment, the second driving component 16 includes a motor, which drives the rotating gear to rotate, causing the dust filter cage 12 to rotate about the height direction of the housing 11 as the rotation axis. This ensures that the refined cotton output from the discharge port 142 is evenly and quickly dispersed on the dust filter cage 12, increasing the dust removal efficiency of the refined cotton. In other embodiments, the first driving component 15 may be configured with other structures, depending on the actual situation.

[0046] Preferably, the filter dust cage 12 can rotate 360°, and the rotation speed of the filter dust cage 12 is 15-30 m / s, preferably 25 m / s, depending on the actual situation. The fiber distributor 14 rotates in the opposite direction to the filter dust cage 12, so that the refined cotton is more evenly dispersed on the filter dust cage 12. Impurities and dust in the refined cotton can enter the dust collection chamber through the mesh hole 121 as much as possible, increasing the dust removal effect. By controlling the rotation speed of the filter dust cage 12, the residence time of the refined cotton in the filter dust cage 12 can be adjusted to avoid excessive suction of refined cotton fibers and clogging of the mesh hole 121.

[0047] More preferably, the aperture of the mesh plate hole 121 is 1.5mm to 2.5mm, preferably 1.5mm. The aperture is determined according to the length of the refined cotton fiber to prevent the refined cotton fiber from falling out of the mesh plate hole 121 due to the aperture being too large, thus causing waste. It also prevents the mesh plate hole 121 from being too small, thus causing incomplete removal of impurities and dust and affecting the dust removal effect.

[0048] Furthermore, the cross-sectional area of ​​the filter dust cage 12 gradually decreases from the first opening 122 to the second opening 123, causing the peripheral wall of the filter dust cage 12 to form an inclined angle. This facilitates the movement of other refined cotton not located on the screw ribbon 13 from the top to the bottom of the filter dust cage 12 under the action of gravity, while preventing refined cotton residue from remaining in the filter dust cage 12. The diameter of the top of the filter dust cage 12 is 1.2m to 1.5m, preferably 1.2m, and the diameter of the bottom is 0.6m to 0.8m, preferably 0.6m, depending on the actual situation.

[0049] Specifically, the refined cotton dust removal device also includes an induced draft fan 2 and a dust collector unit. The induced draft fan 2 has a dust inlet and a dust outlet 21. A dust collection port 111 is provided on the housing 11, which is connected to the dust inlet. The dust collector unit is connected to the dust outlet 21. The induced draft fan 2 generates negative pressure inside the housing 11, causing impurities and dust in the refined cotton to be drawn from the mesh holes 121 into the dust collection chamber. The impurities and dust drawn to the dust collection port 111 then enter the dust collector unit through the dust inlet and dust outlet 21 for collection. Simultaneously, fibers that are too short but still have usable value are recycled, further enhancing their application value. For example, the dust collector unit is a JYFO honeycomb dust collector unit. In other embodiments, other models of dust collector units can also be selected, depending on the actual situation.

[0050] More specifically, the dust collection port 111 is located on the side wall of the housing 11 and adjacent to the second opening 123. This allows impurities and fine dust located at the bottom of the dust collection chamber to be drawn to the dust collection port 111, increasing the dust removal effect.

[0051] Furthermore, the refined cotton dust removal device also includes a rotating roller 3, with the discharge port connected to an outlet section. The rotating roller 3 is rotatably installed within the outlet section. In this embodiment, the rotating roller 3 includes a rotating roller and rotating blades arranged circumferentially on the rotating roller. After the refined cotton has completed dust removal, it accumulates at the discharge port and moves towards the outlet section under gravity. However, the discharge port is prone to clogging of the refined cotton. By rotating the rotating roller 3, the refined cotton is driven to move from the discharge port to the downstream device, increasing the moving speed and preventing clogging of the refined cotton.

[0052] Furthermore, the refined cotton dust removal device also includes a rotary valve 4 and a screw conveyor 5 connected in sequence. The rotary valve 4 includes a third opening and a fourth opening. The third opening is connected to the outlet section, and the fourth opening is connected to the inlet end of the screw conveyor 5. The refined cotton conveyed by the rotating roller 3 enters the rotary valve 4 through the third opening. Under the action of the blades of the rotary valve 4, the refined cotton is fed into the screw conveyor 5 through the fourth opening, realizing the conveying of the refined cotton. The rotary valve 4 is composed of a motor, a drive device, blades, etc. When the motor runs, the drive device drives the blades to rotate, thereby generating airflow. The refined cotton is continuously and timely conveyed, preventing the negative pressure generated by the induced draft fan 2 from entering the rotary valve 4 and causing negative pressure in the downstream device of the rotary valve 4, which would affect the subsequent reaction. Since the rotary valve 4 is existing technology, it will not be described in detail here.

[0053] like Figure 2 As shown, this embodiment also provides a nitrocellulose preparation system, including a belt conveyor 6, a refined cotton unwinding machine 7, a refined cotton unwinding dust removal device, an acid spraying device 8, an esterification machine 9, and a centrifuge connected in sequence. The belt conveyor 6 is used to transport refined cotton, the refined cotton unwinding machine 7 is used to unwind the refined cotton, the refined cotton unwinding dust removal device is used to disperse and filter impurities and dust in the refined cotton, the acid spraying device 8 is used to spray acid to wet the refined cotton after removing impurities and dust, the esterification machine 9 is used to carry out an esterification reaction on the acid-wetted refined cotton, and the centrifuge is used to remove the liquid on the surface of the refined cotton after the esterification reaction to obtain nitrocellulose.

[0054] Specifically, the refined cotton unwinding and dust removal device includes a rotary dust filter 1, an induced draft fan 2, a rotary roller 3, an airlock 4, a screw conveyor 5, and a dust removal unit. The rotary dust filter 1 is used to disperse and filter impurities and fine dust in the refined cotton; the induced draft fan 2 is used to generate negative pressure; the dust removal unit is used to collect impurities and fine dust; the rotary roller 3, airlock 4, and screw conveyor 5 are all used to transport refined cotton, and the airlock 4 is also used to separate the negative pressure generated by the induced draft fan 2. Among them, the induced draft fan 2, airlock 4, screw conveyor 5, dust removal unit, belt conveyor 6, refined cotton unwinding machine 7, acid spraying device 8, esterification machine 9, and centrifuge are all existing devices and will not be described in detail here.

[0055] This nitrocellulose preparation system enables continuous and automated removal of fine impurities and dust from refined cotton, reducing labor costs and eliminating safety hazards caused by the decomposition of fine impurities and dust in the acid spraying device 8 and esterification machine 9. It also prevents light foreign matter such as dust and fine impurities from entering the acid spraying device 8 and being soaked in acid for a long time, causing swelling and hydrolysis, which would affect the solubility quality indicators of the nitrocellulose product.

[0056] In this embodiment, the specific preparation method of the nitrocellulose preparation system includes: refined cotton bales are conveyed to a refined cotton debonding machine 7 via a belt conveyor 6, and after debonding by the refined cotton debonding machine 7, refined cotton is obtained after debonding; the refined cotton after debonding is drawn into a rotary dust filter 1 by a negative pressure suction fan 2, and dispersed into a dust filter cage 12 by a fiber distributor 14; impurities and micro-dust in the refined cotton enter the dust collection chamber through the mesh holes 121, and enter the dust removal unit under the action of the induced draft fan 2, to obtain dust-removed refined cotton; the dust-removed refined cotton is conveyed to an acid spraying device 8 in sequence via a rotary roller 3, an airlock 4 and a screw conveyor 5, and is sprayed with acid by the acid spraying device 8 to obtain acid-wetted refined cotton; the acid-wetted refined cotton is placed in an esterification machine 9 for esterification reaction, and then placed in a centrifuge to remove surface liquid, to obtain nitrocellulose.

[0057] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A dust removal device for refined cotton, characterized in that, The rotary dust filter includes a housing, a fiber distributor, and a filter dust cage disposed within the housing, wherein the filter dust cage is provided with spirally distributed spiral ribbons. The top of the housing has an installation port, and the bottom of the housing has a discharge port; The dust filter cage is rotatably disposed inside the housing with the height direction of the housing as the axis of rotation. The top of the dust filter cage is provided with a first opening, which is positioned opposite the mounting port. The bottom of the dust filter cage is provided with a second opening, which is connected to the discharge port. Multiple mesh plate holes are provided on the side wall of the dust filter cage. A dust collection chamber is formed between the peripheral wall of the housing and the side wall of the dust filter cage. The fiber distributor is rotatably mounted at the mounting port with the height direction of the housing as the axis of rotation. The fiber distributor has a receiving port and a discharging port. The receiving port is used to receive the refined cotton after it has been loosened, and the discharging port is used to output the refined cotton after it has been loosened. The discharging port is located inside the first opening. During the dust removal process of refined cotton, the loosened refined cotton enters from the receiving port and is dispersed into the filter dust cage through the discharge port. The refined cotton is then conveyed to the discharge port along the screw conveyor. During the conveying process, impurities and micro-dust in the refined cotton enter the dust collection chamber through the mesh plate holes.

2. The refined cotton dust removal device according to claim 1, characterized in that, The cross-sectional area of ​​the filter dust cage gradually decreases from the first opening to the second opening.

3. The refined cotton dust removal device according to claim 1, characterized in that, The rotary dust filter also includes a first driving component, which is disposed on the housing and is driven to the fiber distributor to drive the fiber distributor to rotate.

4. The refined cotton dust removal device according to claim 1, characterized in that, The plane where the discharge port is located forms an inclined angle with the height direction of the shell, and the angle ranges from 15° to 30°.

5. The refined cotton dust removal device according to claim 1, characterized in that, The rotary dust filter also includes a second driving component, which is disposed on the housing and is driven to be connected to the dust filter cage for driving the dust filter cage to rotate.

6. The refined cotton dust removal device according to claim 1, characterized in that, It also includes an induced draft fan and a dust removal unit. The induced draft fan has a dust inlet and a dust outlet. A dust collection port is provided on the housing. The dust collection port is connected to the dust inlet. The dust removal unit is connected to the dust outlet.

7. The refined cotton dust removal device according to claim 6, characterized in that, The dust collection port is located on the side wall of the housing and adjacent to the second opening.

8. The refined cotton dust removal device according to claim 1, characterized in that, It also includes a rotating roller, and the discharge port is connected to an outlet section, with the rotating roller rotatably installed within the outlet section.

9. The refined cotton dust removal device according to claim 8, characterized in that, It also includes a valve and a screw conveyor connected in sequence. The valve includes a third opening and a fourth opening. The third opening is connected to the outlet section, and the fourth opening is connected to the inlet end of the screw conveyor.

10. A nitrocellulose preparation system, characterized in that, It includes a belt conveyor, a refined cotton unwinding machine, a refined cotton unwinding dust removal device as described in any one of claims 1-9, an acid spraying device, an esterification machine, and a centrifuge connected in sequence; The belt conveyor is used to transport the refined cotton; The refined cotton decanter is used to decan the refined cotton; The refined cotton dust removal device is used to disperse and filter impurities and dust in the refined cotton; The acid spraying device is used to spray acid to impregnate and remove the impurities and dust from the refined cotton. The esterification machine is used to carry out an esterification reaction on the refined cotton that has been sprayed with acid and impregnated. The centrifuge is used to remove the liquid from the surface of the refined cotton after the esterification reaction, thereby obtaining nitrocellulose.

Images