Acid spraying and infiltrating device for refined cotton

Abstract

The utility model relates to the technical field of refined cotton processing, and discloses a refined cotton acid spraying and infiltrating device. The refined cotton acid spraying and infiltrating device comprises a feeding barrel section, a spraying barrel section and an infiltrating barrel section which are communicated in sequence from top to bottom; refined cotton enters from the feeding end of the feeding barrel section and then enters the spraying barrel section and the infiltration barrel section, a plurality of spraying hole sets distributed in the height direction of the spraying barrel section at intervals are formed in the circumferential wall of the spraying barrel section, and each spraying hole set comprises a plurality of spraying holes annularly formed in the circumferential direction of the spraying barrel section at intervals. The acid spraying and infiltrating device for the refined cotton further comprises an acid inlet cylinder, the acid inlet cylinder is arranged outside the spraying cylinder section in a surrounding mode, acid inlet holes are formed in the acid inlet cylinder, acid liquor enters the acid inlet cylinder through the acid inlet holes and is sprayed into the spraying cylinder section and the infiltrating cylinder section through the spraying holes, so that the acid liquor fully infiltrates the refined cotton in the infiltrating cylinder section, and finally the acid liquor is discharged from the discharging end of the infiltrating cylinder section. The method is applied to preparation of nitrocotton. The refined cotton acid spraying and infiltrating device is uniform in spraying, high in flow speed and good in infiltrating effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of refined cotton processing technology, especially to a refined cotton acid spraying infiltration device. BACKGROUND

[0002] Cellulose is a kind of refined cotton mainly taking cotton linters as raw material, which is formed by cooking, and is widely applied in food processing, medicine manufacturing, daily chemical industry, building materials, explosives and chemical industry and other related fields. Nitrocellulose is a product obtained by esterification reaction of refined cotton with nitro-sulfur mixed acid, and is widely applied in explosives, inks, coatings, films and the like. In the traditional process, the refined cotton is defibered and then conveyed by airflow to a cyclone separator, an acid spraying device is arranged at the lower part of the separator to spray acid for infiltration, and finally esterification reaction is carried out. However, the current acid spraying device is generally in straight cylinder structure, the acid spraying flow rate is uncontrollable and there is an acid spraying dead angle, resulting in poor acid spraying effect. In addition, mixed acid is a strong oxidizing agent and dehydrating agent, and the cotton material or dust that is deposited in the acid spraying dead angle or is not sprayed by acid liquid is prone to abnormal conditions such as dehydration carbonization, decomposition and combustion, thereby forming black slag and affecting the quality of the prepared nitrocellulose product.

[0003] Therefore, it is urgent to provide a refined cotton acid spraying infiltration device to solve the above problems. UTILITY MODEL CONTENT

[0004] Based on the above, the purpose of the utility model is to provide a refined cotton acid spraying infiltration device, which has uniform spraying, fast flow rate and good infiltration effect.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A refined cotton acid spraying infiltration device, comprising a feeding cylinder segment, a spraying cylinder segment and an infiltration cylinder segment which are sequentially communicated from top to bottom.

[0007] One end of the feeding cylinder segment away from the spraying cylinder segment is a feeding end, and the feeding end is used for feeding.

[0008] One end of the spraying cylinder segment close to the feeding cylinder segment is a first end, and one end of the spraying cylinder segment close to the infiltration cylinder segment is a second end. The inner ring cross-sectional area of the spraying cylinder segment gradually increases from the first end to the second end.

[0009] A plurality of spraying hole groups are arranged on the peripheral wall of the spraying cylinder segment and are spaced along the height direction of the spraying cylinder segment. Each spraying hole group comprises a plurality of spraying holes which are annularly arranged along the circumferential direction of the spraying cylinder segment.

[0010] The acid inlet cylinder is arranged around the spray cylinder section, and the acid inlet cylinder is provided with acid inlet holes, through which the acid liquid enters the acid inlet cylinder and is sprayed into the spray cylinder section and the infiltration cylinder section through the spray holes.

[0011] The end of the infiltration cylinder section, which is away from the spray cylinder section, is a discharge end for discharging materials.

[0012] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the spray holes in each adjacent two spray hole groups are alternately distributed.

[0013] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the central axis of the spray hole is parallel to the normal of the circumferential wall of the spray cylinder section.

[0014] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the device further comprises a connecting cylinder and a flushing pipe, the two ends of the connecting cylinder are communicated with the second end of the spray cylinder section and the end of the infiltration cylinder section close to the spray cylinder section, the connecting cylinder is provided with a connecting hole, and the flushing pipe is communicated with the connecting hole, so that the cleaning liquid is sprayed into the connecting cylinder through the flushing pipe.

[0015] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the device comprises two flushing pipes, the two flushing pipes are symmetrically arranged along the tangent direction of the outer periphery of the connecting cylinder, and the liquid inlet directions of the two flushing pipes are opposite.

[0016] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the flushing pipe is provided with an electric valve, and the electric valve is used for controlling the opening and closing of the flushing pipe.

[0017] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the device further comprises a time relay, the time relay is electrically connected with the electric valve, and the time relay is used for controlling the opening or closing of the electric valve within a preset time.

[0018] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the device further comprises a cleaning pipe, the cleaning pipe is arranged outside the acid inlet cylinder, the acid inlet cylinder is provided with the cleaning hole, the cleaning hole is communicated with the cleaning pipe, and the cleaning liquid is sprayed into the acid inlet cylinder through the cleaning pipe.

[0019] As a preferred scheme of the acid spraying and infiltration device for refined cotton, the cross-sectional area of the inner ring of the infiltration cylinder section gradually decreases from the end of the infiltration cylinder section close to the spray cylinder section to the discharge end.

[0020] The acid spraying and infiltration device for refined cotton has the following beneficial effects.

[0021] The utility model provides a kind of refined cotton spray acid infiltration device, the spray acid infiltration device includes the feeding cylinder section, spray cylinder section and infiltration cylinder section sequentially communicated from top to bottom, refined cotton enters from the feeding end of feeding cylinder section, then enter spray cylinder section and infiltration cylinder section, acid liquor enters into acid feeding cylinder by acid feeding hole, and it is sprayed into spray cylinder section and infiltration cylinder section by spray hole, so that acid liquor is fully infiltrated in infiltration cylinder section to refined cotton, finally, it is discharged from the discharge end of infiltration cylinder section, and it is applied in the preparation of nitrocellulose.The peripheral wall of spray cylinder section forms an angle with its central axis, and a plurality of spray holes are arranged on the peripheral wall, so that the acid liquor sprayed from the spray holes can be sprayed on refined cotton in infiltration cylinder section without dead angle, reducing the dead zone of spray acid, and the spraying of refined cotton by acid liquor through spray hole is more uniform.In addition, the acid feeding cylinder is arranged outside the spray acid cylinder section, so that the acid liquor forms a large pressure in the acid feeding cylinder, increasing the flow rate of acid liquor into the spray hole, and the infiltration effect on refined cotton is better.The spray acid infiltration device has the characteristics of no clogging, no dust adhesion, high spray uniformity and fast flow rate, and the mixed acid spraying and infiltration by the spray acid infiltration device can quickly infiltrate and flush refined cotton, avoiding carbonization and decomposition of refined cotton, which affects the quality of nitrocellulose products. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the utility model. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the utility model and these drawings.

[0023] Fig. 1 It is the front view of the refined cotton spray acid infiltration device provided by the embodiments of the utility model.

[0024] Fig. 2 It is the side view of the refined cotton spray acid infiltration device provided by the embodiments of the utility model.

[0025] Fig. 3 It is the plan view of the refined cotton spray acid infiltration device provided by the embodiments of the utility model.

[0026] Fig. 4 It is the distribution diagram of the spray hole provided by the embodiments of the utility model.

[0027] In the drawings:

[0028] 1, feeding cylinder section; 11, feeding end; 2, spray cylinder section; 21, spray hole; 3, infiltration cylinder section; 32, discharge end; 4, acid feeding cylinder; 5, connecting cylinder; 6, acid flushing pipe; 7, cleaning pipe. DETAILED DESCRIPTION

[0029] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation of the utility model. In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0033] As Figs. 1 to 4As shown, the embodiment provides a refined cotton spray acid infiltration device, which comprises feeding cylinder segment 1, spraying cylinder segment 2 and infiltration cylinder segment 3 communicated in sequence from top to bottom. The end of feeding cylinder segment 1 away from spraying cylinder segment 2 is feeding end 11, which is used for feeding. The end of spraying cylinder segment 2 close to feeding cylinder segment 1 is first end, and the end of spraying cylinder segment 2 close to infiltration cylinder segment 3 is second end. The cross-sectional area of inner ring of spraying cylinder segment 2 gradually increases from first end to second end. A plurality of spraying hole groups are arranged on the peripheral wall of spraying cylinder segment 2, and each spraying hole group comprises a plurality of spraying holes 21 arranged in the circumferential direction of spraying cylinder segment 2. The refined cotton spray acid infiltration device further comprises acid feeding cylinder 4, which is arranged outside spraying cylinder segment 2. Acid feeding cylinder 4 is provided with acid feeding holes. Acid enters acid feeding cylinder 4 through acid feeding holes and is sprayed into spraying cylinder segment 2 and infiltration cylinder segment 3 through spraying holes 21. The end of infiltration cylinder segment 3 away from spraying cylinder segment 2 is discharge end 32, and feeding end 11 is used for discharging. Refined cotton enters from feeding end 11 of feeding cylinder segment 1, then enters spraying cylinder segment 2 and infiltration cylinder segment 3. Acid enters acid feeding cylinder 4 through acid feeding holes and is sprayed into spraying cylinder segment 2 and infiltration cylinder segment 3 through spraying holes 21, so that acid fully infiltrates refined cotton in infiltration cylinder segment 3. Finally, refined cotton is discharged from discharge end 32 of infiltration cylinder segment 3 and is applied in the preparation of nitrocellulose. The peripheral wall of spraying cylinder segment 2 forms an angle with the central axis, and a plurality of spraying holes 21 are arranged on the peripheral wall. Acid sprayed from spraying holes 21 is sprayed on refined cotton in spraying cylinder segment 2 without dead angle, reducing the dead area of acid spraying, and the spraying of refined cotton by acid after passing through spraying holes 21 is more uniform. In addition, acid feeding cylinder 4 is arranged outside spraying cylinder segment 2, so that acid forms a large pressure in acid feeding cylinder 4, increasing the flow rate of acid entering spraying holes 21, and the infiltration effect of refined cotton is better. The refined cotton spray acid infiltration device has the characteristics of no blockage, no dust adhesion, high spraying uniformity and fast flow rate. Through the acid infiltration device, mixed acid spraying and infiltration are carried out, so that refined cotton is quickly infiltrated and washed, avoiding carbonization and decomposition of refined cotton affecting the quality of nitrocellulose products.

[0034] For example, feeding cylinder segment 1 is in the form of a cylinder, spraying cylinder segment 2 is in the form of a circular truncated cone, and infiltration cylinder segment 3 is in the form of an inverted circular truncated cone. The above structures facilitate the feeding of refined cotton and the spraying and infiltration of acid, and realize the dead angle-free infiltration of refined cotton. In other embodiments, feeding cylinder segment 1, spraying cylinder segment 2 and infiltration cylinder segment 3 can also have other structures, which are determined according to specific conditions.

[0035] Exemplarily, the height of the feeding cylinder segment 1 is 225 mm, the outer diameter is 450 mm, the height of the spraying cylinder segment 2 is 50 mm, the height of the immersion cylinder segment 3 is 460 mm, and the wall thickness of the whole refined cotton spraying acid immersion device is 3 mm, which meets the requirement of sufficient acid liquid immersion. In other embodiments, the related dimensions of the whole refined cotton spraying acid immersion device can be other values, which are set according to specific conditions.

[0036] Preferably, the acid feeding cylinder 4 is annularly arranged outside the spraying cylinder segment 2 and part of the feeding cylinder segment 1, so that the capacity of the acid feeding cylinder 4 is larger. In addition, the acid feeding cylinder 4 arranged on part of the feeding cylinder segment 1 is provided with an acid feeding hole, and the acid liquid entering height is higher than the height of the spraying cylinder segment 2, so that the acid liquid can enter the spraying holes 21 uniformly at the same time. Exemplarily, the height of the acid feeding cylinder 4 is 175 mm, and in other embodiments, the height of the acid feeding cylinder 4 can be other values, which are set according to specific conditions.

[0037] Specifically, the inner cross-sectional area of the immersion cylinder segment 3 gradually decreases from one end of the immersion cylinder segment 3 close to the spraying cylinder segment 2 to the discharge end 32, and the angle between the peripheral wall of the immersion cylinder segment 3 and its radial plane is not less than 69°, so that the refined cotton material or dust immersed by the acid liquid freely slides on the slope of the peripheral wall of the immersion cylinder segment 3 by gravity, avoiding decomposition or combustion carbonization of the cotton material, and meeting the requirement of sufficient acid liquid immersion. Exemplarily, the angle between the peripheral wall of the immersion cylinder segment 3 and its radial plane is 69°, and in other embodiments, the angle can be other values, which are set according to specific conditions.

[0038] More specifically, the refined cotton spraying acid immersion device further comprises a discharge cylinder segment, which is in communication with the discharge end 32 of the immersion cylinder segment 3. The setting of the discharge cylinder segment facilitates the discharge of the refined cotton fully immersed by the acid liquid along the height direction of the refined cotton spraying acid immersion device, so that the refined cotton material is washed into the reaction esterification machine, facilitating the subsequent nitrocellulose preparation process. Exemplarily, the height of the discharge cylinder segment is 80 mm, and the outer diameter is 316 mm. In other embodiments, the dimensions of the discharge cylinder segment can be other values, which are set according to specific conditions.

[0039] Further, the spraying holes 21 in each adjacent two spraying hole groups are alternately distributed, reducing the acid spraying dead zone generated by the symmetrical division of the spraying holes 21, avoiding the deposition of the refined cotton material through the acid liquid on the lower slope, and enabling the acid liquid sprayed from the spraying holes 21 to immerse the refined cotton material without dead angle.

[0040] Still further, the central axis of the spraying hole 21 is parallel to the normal of the spraying cylinder segment 2, so that the spraying direction of the acid liquid entering from the spraying hole 21 is parallel to the normal of the spraying cylinder segment 2.

[0041] Exemplarily, the peripheral wall of the spraying cylinder segment 2 is at an angle of 65° with the central axis thereof, which can reduce the coverage blind area of the spraying cylinder segment 2 and acid liquid, while ensuring that the spraying acid liquid converges at the central point of the axis. The spraying holes 21 are radially symmetrically and alternately distributed, and are arranged in three spraying hole groups in the circumferential direction, each spraying hole group including 72 spraying holes 21, which increases the spraying density of the acid liquid and reduces the situation of insufficient immersion of the cotton material when penetrating the acid liquid. Since the acid inlet amount of the acid spraying and immersion device is 16 m 3 / h according to the process requirements, the diameter of the spraying hole 21 is set to 5.5 mm, the number of the spraying hole 21 is 216, and the normal flow rate is about 0.87 m / s.

[0042] According to the flow rate equal to the cross-sectional area multiplied by the flow rate Q = πr 2 × V;

[0043] that is, the flow rate = 16 × 106 ÷ 2.75 2 ÷ 3.14 ÷ 3600 ÷ 216 = 0.87 m / s.

[0044] Therefore, when the inner diameter of the spraying hole 21 is 5.5 mm and the number of the spraying hole 21 is 216, the flow rate is greater than 0.8 m / s, which has a large potential energy, can prevent the suspended fibers in the mixed acid from blocking the acid spraying hole, and can quickly immerse and flush the cotton material into the reaction esterification machine for subsequent nitration cotton preparation process. In other examples, the diameter of the spraying hole 21 and the number of the spraying hole 21 that meet the acid inlet amount and the flow rate can be applied in the acid spraying and immersion device, and are set according to specific conditions.

[0045] Further, the refined cotton acid spraying and immersion device further includes a connecting cylinder 5 and an acid flushing pipe 6, the two ends of the connecting cylinder 5 are respectively communicated with the second end of the spraying cylinder segment 2 and the end of the immersion cylinder segment 3 close to the spraying cylinder segment 2, the connecting cylinder 5 is provided with a connecting hole, the acid flushing pipe 6 is communicated with the connecting hole, and the cleaning liquid is sprayed into the connecting cylinder 5 through the acid flushing pipe 6. The cleaning liquid entering from the acid flushing pipe 6 can clean the inner wall of the connecting cylinder 5 and the immersion cylinder segment 3, and clean the deposited cotton material or dust on the inner wall of the connecting cylinder 5 and the immersion cylinder segment 3. Exemplarily, the height of the connecting cylinder 5 is 25 mm, and the connecting cylinder 5 is provided to facilitate the communication of the acid flushing pipe 6. In other embodiments, the height of the connecting cylinder 5 can be other values, which are set according to specific conditions.

[0046] Further, the refined cotton acid spraying and immersion device includes two acid flushing pipes 6, the two acid flushing pipes 6 are symmetrically arranged along the tangent direction of the outer periphery of the connecting cylinder 5, and the liquid inlet directions of the two acid flushing pipes 6 are opposite. By arranging the two acid flushing pipes 6 with opposite opening directions, the immersion cylinder segment 3 is fully and dead-angle-free cleaned. Exemplarily, the outer diameter of the two acid flushing pipes 6 is 32 mm, and the length is 300 mm. In other embodiments, the size of the acid flushing pipe 6 can be other values, which are set according to specific conditions.

[0047] Preferably, the acid flushing pipe 6 is provided with an electric valve for controlling the on-off of the acid flushing pipe 6, through the control of the electric valve, the automatic operation is realized, the use is more convenient, and the use efficiency is improved.

[0048] More preferably, the refined cotton spraying acid infiltration device further comprises a time relay, the time relay is electrically connected to the electric valve, and the time relay is used for controlling the electric valve to be opened or closed within a preset time. Exemplarily, the preset time is preferably two hours, through the time relay, the electric valve is controlled to open the acid flushing pipe 6 to clean the deposited cotton or dust on the inner wall of the infiltration cylinder section 3 every 2 hours, and in other embodiments, the preset time can be 1 hour or 3 hours, etc., which is set according to specific conditions.

[0049] Specifically, the refined cotton spraying acid infiltration device further comprises a cleaning pipe 7, the cleaning pipe 7 is arranged outside the acid inlet cylinder 4, the acid inlet cylinder 4 is provided with a cleaning hole, the cleaning hole is communicated with the cleaning pipe 7, and the cleaning liquid is sprayed into the acid inlet cylinder 4 through the cleaning pipe 7. The deposited cotton or dust in the spraying hole 21 is cleaned, and the spraying hole 21 is prevented from being blocked. Exemplarily, the size of the cleaning hole 7 is 150mm*150mm, and in other embodiments, the size of the cleaning hole 7 can be other values, which is set according to specific conditions.

[0050] The above are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A device for acid pickling of cotton, characterized in that The feeding cylinder section, the spraying cylinder section and the soaking cylinder section are sequentially communicated from top to bottom. The feeding end of the feeding cylinder section is used for feeding. The first end of the spraying cylinder section is close to the feeding cylinder section, and the second end of the spraying cylinder section is close to the soaking cylinder section. The cross-sectional area of the inner ring of the spraying cylinder section gradually increases from the first end to the second end. A plurality of spraying hole groups are arranged on the peripheral wall of the spraying cylinder section and are spaced along the height direction of the spraying cylinder section. The acid feeding cylinder is arranged around the spraying cylinder section, and an acid feeding hole is arranged on the acid feeding cylinder.

2. The refined cotton acid spray infiltration device of claim 1, wherein, The second end of the soaking cylinder section is used for discharging.

3. The refined cotton acid spray infiltration device of claim 1, wherein, The spraying holes in each two adjacent spraying hole groups are alternately arranged.

4. The refined cotton acid spray infiltration device of claim 1, wherein, The central axis of the spraying hole is parallel to the normal of the peripheral wall of the spraying cylinder section.

5. The refined cotton acid spray infiltration device of claim 4, wherein, The connecting cylinder is connected with the second end of the spraying cylinder section and the end of the soaking cylinder section close to the spraying cylinder section.

6. The refined cotton acid spray infiltration device of claim 4, wherein, The two flushing pipes are symmetrically arranged along the tangent direction of the outer periphery of the connecting cylinder, and the liquid inlet directions of the two flushing pipes are opposite.

7. The refined cotton acid spray infiltration device of claim 6, wherein, The electric valve is arranged on the flushing pipe and is used for controlling the opening and closing of the flushing pipe.

8. The refined cotton acid spray infiltration device of claim 4, wherein, The time relay is electrically connected with the electric valve and is used for controlling the electric valve to be opened or closed within a preset time.

9. The refined cotton acid spray infiltration device of claim 1, wherein, The cleaning pipe is arranged outside the acid feeding cylinder, and a cleaning hole is arranged on the acid feeding cylinder. The cross-sectional area of the inner ring of the soaking cylinder section gradually decreases from the end of the soaking cylinder section close to the spraying cylinder section to the discharging end.

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