A drying device for preparing zinc oxide

Abstract

The present invention relates to the field of zinc oxide drying, and in particular to a drying device for zinc oxide preparation, including a drying machine, a drum, an air inlet pipe and a linkage assembly, etc.; the drying machine is provided with an air outlet; the drying machine is provided with a drum; a plurality of lifting plates for lifting zinc oxide powder are provided inside the drum; an air inlet pipe for guiding hot air is installed on the drying machine; the air inlet pipe is connected to an external heat exchanger; a feed port is provided on the air inlet pipe; a plurality of cover plates are provided on the air inlet pipe, and the drum is rotatably connected to the cover plates; an outer tooth ring is provided on the drum, and the outer tooth ring is located between two adjacent cover plates; a linkage assembly is installed between two adjacent cover plates. The present invention realizes extrusion of paste zinc oxide by a first extrusion roller and a second extrusion roller, so that the paste zinc oxide is transformed from a block to a thin sheet, thereby increasing the contact area between the paste zinc oxide and the hot air in the drum, and improving the drying effect of zinc oxide.

Description

Technical Field

[0001] The invention relates to the field of zinc oxide drying, in particular to drying equipment for preparing zinc oxide. Background Art

[0002] In the preparation process of zinc oxide, in order to facilitate processing and handling, a binder is usually added to make the zinc oxide paste-like. In the subsequent drying process, the chain inside the drum dryer is usually used to continuously turn and stir the paste zinc oxide in the drum, so that the paste zinc oxide gradually disperses during the drying process and turns into a powder or granular form that is easier to handle. However, in the above drying process, the paste zinc oxide is affected by the mechanical force of the chain to different degrees, and the hot air inside the drum dryer cannot be evenly distributed on the zinc oxide, resulting in uneven sizes of zinc oxide powder particles after drying. This makes the zinc oxide powder prone to stratification or agglomeration during storage and transportation, affecting storage stability and transportation safety. Therefore, more refined screening is required later, which increases processing costs. Summary of the invention

[0003] In order to overcome the disadvantages that in the drying process of the existing drum dryer, zinc oxide is subjected to different degrees of mechanical force of the chain, resulting in uneven size of zinc oxide powder particles after drying, which makes the zinc oxide powder prone to stratification or agglomeration during storage and transportation, affecting storage stability and transportation safety, the present invention provides a drying device for preparing zinc oxide.

[0004] The technical scheme is: a drying device for preparing zinc oxide, comprising a dryer and a drum; the dryer is provided with an air outlet; the dryer is provided with a drum; a plurality of lifting plates for lifting zinc oxide powder are provided inside the drum; the dryer also comprises an air inlet pipe, a linkage assembly, a first extrusion roller, a second extrusion roller and a screen; the dryer is provided with an air inlet pipe for guiding hot air; the air inlet pipe is connected with an external heat exchanger; a feed port is provided on the air inlet pipe; a plurality of cover plates are provided on the air inlet pipe, and the drum is rotatably connected with the cover plates; an outer tooth ring is provided on the drum, and the outer tooth ring is located between two adjacent cover plates; a linkage assembly is installed between two adjacent cover plates; a first extrusion roller is installed on the linkage assembly; a second extrusion roller is installed on the linkage assembly; a screen for screening zinc oxide powder is installed in the drum, and the screen is arranged to be tilted downward;

[0005] Each lifting plate is set at an angle inside the drum;

[0006] It also includes a second driving member, an extrusion rod and a guide plate; the second driving member is fixedly connected to the right side of the dryer, and the second driving member is an electric push rod; the output end of the second driving member is fixedly connected to the extrusion rod, and the extrusion rod passes through the upper side of the air inlet pipe; a plurality of guide plates are rotatably connected in the air inlet pipe through a torsion spring; a plurality of extrusion balls are arranged on the extrusion rod, and each extrusion ball contacts the upper surface of the adjacent guide plate.

[0007] Furthermore, a plurality of cutters are arranged on the first squeezing roller.

[0008] Furthermore, the linkage assembly includes gear 1 and gear 2; the first extrusion roller is rotatably connected to the cover plate of the air inlet duct; gear 1 is fixedly connected to the right side of the first extrusion roller, and gear 1 is meshed with the outer gear ring of the drum; the second extrusion roller is rotatably connected to the cover plate of the air inlet duct; gear 2 is fixedly connected to the right side of the second extrusion roller, and gear 2 is meshed with gear 1; gear 1 and gear 2 are both located between two adjacent cover plates.

[0009] Furthermore, a baffle bar is installed in the drum to prevent the zinc oxide from falling, and the baffle bar is in a constricted shape on one side close to the first squeezing roller and the second squeezing roller.

[0010] Furthermore, the screen and the baffle are arranged to be detachably connected.

[0011] Furthermore, each lifting plate is provided with an anti-stick coating.

[0012] Furthermore, it also includes an anti-accumulation component, which includes a first driving member and a connecting block; the first driving member is fixedly connected to the rear side of the dryer, and the first driving member is an electric push rod; the output end of the first driving member is fixedly connected to a connecting block for preventing material accumulation, and the connecting block is fixedly connected to the baffle.

[0013] Furthermore, a filter screen is also included; a filter screen for screening zinc oxide powder is arranged in the discharge pipe of the dryer.

[0014] Beneficial effects: The present invention realizes extrusion of the paste zinc oxide by the first extrusion roller and the second extrusion roller, so that the paste zinc oxide is transformed from a block to a flake, thereby increasing the contact area between the paste zinc oxide and the hot air in the drum, and improving the drying effect of the zinc oxide;

[0015] The edge of the screen is shielded by the baffle to prevent the zinc oxide powder from falling directly from the edge of the screen and affecting the screening efficiency of the screen;

[0016] The lifting plate is set in an inclined shape, so that more zinc oxide can be caught during the rotation process, and the amount of zinc oxide falling on the screen is increased, so that more zinc oxide can be crushed for the second time, and the phenomenon of uneven particle size of zinc oxide powder is reduced to the greatest extent, while improving the overall drying effect;

[0017] The guide plate is squeezed by the squeezing rod to make the guide plate rotate up and down repeatedly, thereby guiding the hot air inside the air inlet pipe and blowing the hot air to every corner of the drum, thereby enhancing the drying effect of the zinc oxide powder, preventing the small particles of zinc oxide powder from drying too quickly and the large particles of zinc oxide powder from being insufficiently dried, and improving the overall drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the drying equipment for preparing zinc oxide of the present invention;

[0019] Figure 2 It is a combined cross-sectional view of the drum and the air inlet pipe of the present invention;

[0020] Figure 3 It is a schematic diagram of a three-dimensional structure of a linkage assembly, a first squeezing roller and a second squeezing roller combination of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the anti-deposition component and the filter screen combination of the present invention;

[0022] Figure 5 It is a schematic diagram of the combined three-dimensional structure of the second driving member, the extrusion rod and the guide plate of the present invention.

[0023] The markings of the components in the accompanying drawings are as follows: 1-dryer, 1001-air outlet, 1002-discharge pipe, 2-drum, 2001-lifting plate, 2002-outer gear ring, 3-air inlet pipe, 3001-feeding port, 3002-covering plate, 4-first extrusion roller, 4001-cutter, 5-second extrusion roller, 6-screen, 7-bar, 101-gear one, 102-gear two, 201-first driving member, 202-connecting block, 203-filter, 301-second driving member, 302-extrusion rod, 303-guide plate. DETAILED DESCRIPTION

[0024] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] Example 1

[0026] A drying device for preparing zinc oxide, such as Figure 1-Figure 3 As shown, it includes a dryer 1 and a drum 2; the dryer 1 is provided with an air outlet 1001; the dryer 1 is provided with a drum 2; and the drum 2 is provided with a plurality of lifting plates 2001;

[0027] It also includes an air inlet pipe 3, a linkage component, a first squeezing roller 4, a second squeezing roller 5 and a screen 6; the dryer 1 is equipped with an air inlet pipe 3; the air inlet pipe 3 is connected to an external heat exchanger; a feed port 3001 is arranged on the air inlet pipe 3; two cover plates 3002 are arranged on the air inlet pipe 3, and the drum 2 is rotatably connected with the cover plates 3002; an outer toothed ring 2002 is arranged on the drum 2, and the outer toothed ring 2002 is located between two adjacent cover plates 3002; a linkage component is installed between two adjacent cover plates 3002; a first squeezing roller 4 is installed on the linkage component; a second squeezing roller 5 is installed on the linkage component, and the first squeezing roller 4 and the second squeezing roller 5 are driven by the linkage component to rotate towards each other, so as to extrude and crush the zinc oxide; a screen 6 is installed in the drum 2, and the screen 6 is arranged to be tilted downward; the screen 6 is located at the upper left of the first squeezing roller 4 and the second squeezing roller 5;

[0028] Each lifting plate 2001 is arranged obliquely in the drum 2;

[0029] It also includes a second driving member 301, an extrusion rod 302 and a guide plate 303; the second driving member 301 is fixedly connected to the right side of the dryer 1, and the second driving member 301 is an electric push rod; the output end of the second driving member 301 is fixedly connected to the extrusion rod 302, and the extrusion rod 302 passes through the upper side of the air inlet pipe 3; four guide plates 303 are rotatably connected in the air inlet pipe 3 through a torsion spring; a plurality of extrusion balls are arranged on the extrusion rod 302, and each extrusion ball contacts the upper surface of the adjacent guide plate 303.

[0030] Three cutters 4001 are provided on the first squeezing roller 4 .

[0031] The linkage assembly includes gear one 101 and gear two 102; the first squeezing roller 4 is rotatably connected to the cover plate 3002 of the air inlet duct 3; gear one 101 is fixedly connected to the right side of the first squeezing roller 4, and gear one 101 is meshed with the outer gear ring 2002 of the drum 2; the second squeezing roller 5 is rotatably connected to the cover plate 3002 of the air inlet duct 3; gear two 102 is fixedly connected to the right side of the second squeezing roller 5, and gear two 102 is meshed with gear one 101; gear one 101 and gear two 102 are both located between two adjacent cover plates 3002.

[0032] A baffle 7 is installed in the drum 2. When viewed from top to bottom, the baffle 7 is in a constricted shape on the side close to the first squeezing roller 4 and the second squeezing roller 5.

[0033] The screen 6 and the baffle 7 are arranged to be detachably connected; by arranging the screen 6 as a convenient detachable connection, the screen 6 can be replaced manually according to different requirements of the zinc oxide powder particle size.

[0034] Each lifting plate 2001 is provided with an anti-stick coating.

[0035] The working principle of this embodiment is:

[0036] In the preparation process of zinc oxide, in order to facilitate processing and handling, a binder is usually added to make the zinc oxide paste-like. In the subsequent drying process, the chain inside the drum 2 dryer 1 is usually used to continuously flip and stir the paste zinc oxide in the drum 2, so that the paste zinc oxide gradually disperses during the drying process and is transformed into a powder or granular form that is easier to handle. However, in the above-mentioned drying process, the paste zinc oxide is subjected to different degrees of the mechanical force of the chain, and the hot air inside the drum 2 dryer 1 cannot be evenly distributed on the zinc oxide, resulting in uneven sizes of the zinc oxide powder particles after drying, which makes the zinc oxide powder prone to stratification or agglomeration during storage and transportation, affecting storage stability and transportation safety. Therefore, more refined screening is required later, which increases processing costs.

[0037] The first step is to manually start the dryer 1 and the external heat exchanger, and while heating the drum 2, pour a proper amount of paste zinc oxide into the drum 2 from the feed port 3001 of the air inlet pipe 3, so that the hot air enters the drum 2 through the air inlet pipe 3 and contacts with the paste zinc oxide, and finally is discharged to the outside from the air outlet 1001. At the same time, based on the view from left to right, the dryer 1 is controlled to drive the drum 2 to rotate counterclockwise, so that the paste zinc oxide is more evenly dispersed under the turning of the lifting plate 2001 in the drum 2.

[0038] At the same time, when the drum 2 rotates counterclockwise, the outer gear ring 2002 of the drum 2 will drive the gear 1 101 to rotate counterclockwise, and then drive the gear 2 102 to rotate clockwise, so that the first squeezing roller 4 and the second squeezing roller 5 rotate clockwise and counterclockwise respectively.

[0039] When the zinc oxide paste enters the drum 2 from the feed port 3001, since the feed port 3001 is located above the first squeezing roller 4 and the second squeezing roller 5, the zinc oxide paste will fall on the first squeezing roller 4 and the second squeezing roller 5, and through the squeezing of the first squeezing roller 4 and the second squeezing roller 5, fall to the bottom of the drum 2 in the form of thin sheets. At the same time, the zinc oxide paste is cut by the cutter 4001 on the first squeezing roller 4, so that the zinc oxide paste falls from between the first squeezing roller 4 and the second squeezing roller 5 in the form of multiple thin sheets, thereby preventing the entire thin sheet of zinc oxide from stacking together and affecting the drying effect. As the drum 2 rotates counterclockwise, the zinc oxide paste in the form of thin sheets is continuously lifted and thrown down under the stirring action of the lifting plate 2001, and is squeezed by the first squeezing roller 4 and the second squeezing roller 5, so that the zinc oxide paste is transformed from block to thin sheets, thereby increasing the contact area between the zinc oxide paste and the hot air in the drum 2, and improving the drying effect of the zinc oxide.

[0040] Although only one set of first extrusion rollers 4 and second extrusion rollers 5 achieves the above-mentioned technical effect, this is the quantitative combination that can ensure the realization of the extrusion effect. Assuming that an additional set of first extrusion rollers 4 and second extrusion rollers 5 are added and arranged next to the first set of first extrusion rollers 4 and second extrusion rollers 5 to jointly receive the paste zinc oxide, it will actually affect the realization of the technical effect. Because after the addition, the first extrusion rollers 4 of the first group will inevitably be adjacent to the second extrusion rollers 5 of the second group, or the second extrusion rollers 5 of the first group will be adjacent to the first extrusion rollers 4 of the second group. In this case, the direction of the force applied by the first and second groups of adjacent rollers to the paste zinc oxide is upward, rather than downward as required to achieve the purpose. In addition, the gap between the two is small, so the paste zinc oxide will inevitably be retained in the gap between the first and second groups of adjacent rollers for a long time and cannot be utilized, and the target technical effect cannot be achieved.

[0041] As the drying process proceeds, the drum 2 continues to rotate counterclockwise, and the zinc oxide powder in the drum 2 is continuously lifted and thrown down by the lifting plate 2001. Some of the flaky zinc oxide will gradually be broken into powder, and some of the flaky zinc oxide will be transformed into irregular blocks and distributed in the drum 2. At the same time, the zinc oxide inside the drum 2 will gradually move toward the discharge pipe 1002. At the same time, when the zinc oxide powder in the drum 2 is lifted and thrown down by the lifting plate 2001, it will fall on the screen 6, and the fine zinc oxide powder will directly pass through the screen 6 and fall downward. The first extrusion roller 4 and the second extrusion roller 5 are located at the upper left, and the screen 6 is tilted downward, so the powdered and blocky zinc oxide powder will gradually roll along the screen 6 to the side of the first extrusion roller 4 and the second extrusion roller 5, and fall on the first extrusion roller 4 and the second extrusion roller 5, so that the first extrusion roller 4 and the second extrusion roller 5 perform secondary extrusion and crushing on the zinc oxide, thereby continuously repeating the above process, thereby improving the crushing effect of the zinc oxide powder; the edge of the screen 6 is shielded by the baffle 7 to prevent the zinc oxide powder from falling directly from the edge of the screen 6 to avoid affecting the screening efficiency of the screen 6.

[0042] Since the baffle 7 is in a constricted shape near the first squeezing roller 4 and the second squeezing roller 5, when the zinc oxide moves to the right along the screen 6, the baffle 7 guides the zinc oxide so that more zinc oxide can fall directly between the first squeezing roller 4 and the second squeezing roller 5, thereby improving the crushing effect of the first squeezing roller 4 and the second squeezing roller 5.

[0043] When the lifting plate 2001 rotates with the drum 2, the lifting plate 2001 is set in an inclined shape, so that more zinc oxide can be caught during the rotation, increasing the amount of zinc oxide falling on the screen 6, so that more zinc oxide can be crushed for the second time, minimizing the uneven particle size of zinc oxide powder and improving the overall drying effect.

[0044] When the drum 2 rotates counterclockwise, the lifting plate 2001 will drive part of the zinc oxide powder at the bottom of the drum 2 to rotate together, until it rotates to the upper part, the zinc oxide powder will fall downward due to gravity. Since the drum 2 rotates counterclockwise, most of the zinc oxide will accumulate on the front side of the screen 6. At this time, the screen 6 is placed in a backward tilted state, so that the fallen zinc oxide powder can roll backward along the screen 6, which can not only effectively avoid the accumulation of zinc oxide powder, but also improve the screening effect of the screen 6.

[0045] At the same time, as the drying process proceeds, the second driving member 301 is controlled to drive the extrusion rod 302 to move up and down, and to squeeze and pull the extrusion rod 302, so that the extrusion ball on the extrusion rod 302 squeezes the right side of the adjacent guide plate 303, and the guide plate 303 repeatedly rotates up and down, thereby guiding the hot air inside the air inlet pipe 3, and blowing the hot air to all corners of the drum 2, thereby enhancing the drying effect of the zinc oxide powder, preventing the occurrence of small-particle zinc oxide powder drying too quickly and large-particle zinc oxide powder insufficiently dried, and improving the overall drying effect.

[0046] In the second step, when the zinc oxide powder in the drum 2 is completely dried, the discharge pipe 1002 is opened, and the dryer 1 is controlled to drive the drum 2 to reverse, and the zinc oxide powder in the drum 2 is driven to be discharged toward the discharge pipe 1002 through the lifting plate 2001, thereby completing the drying of the zinc oxide powder.

[0047] Example 2

[0048] On the basis of Example 1, Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, an anti-accumulation component is also included, which includes a first driving member 201 and a connecting block 202; the first driving member 201 is fixedly connected to the rear side of the dryer 1, and the first driving member 201 is an electric push rod; the output end of the first driving member 201 is fixedly connected to the connecting block 202, and the connecting block 202 is fixedly connected to the baffle 7.

[0049] A filter screen 203 is also included; the filter screen 203 is arranged in the discharge pipe 1002 of the dryer 1.

[0050] The working steps of this embodiment are:

[0051] In the first step of Example 1: when zinc oxide falls on the screen 6, due to the high humidity of zinc oxide in the initial state, part of the zinc oxide is difficult to move along the screen 6 toward the first extrusion roller 4 and the second extrusion roller 5, resulting in the zinc oxide accumulating on the screen 6, affecting the drying effect.

[0052] To solve the above problem, when zinc oxide falls on the screen 6, the first driving member 201 is controlled to drive the connecting block 202 and the screen 6 to move up and down continuously, so that the screen 6 produces high-frequency up and down shaking, so that the zinc oxide is continuously separated from the screen 6 to prevent the zinc oxide from accumulating on the screen 6. At the same time, with the drying of hot air, the zinc oxide continuously collides with the screen 6 when the screen 6 shakes up and down, so that the blocky zinc oxide is broken, further improving the crushing effect of the zinc oxide.

[0053] As the drying proceeds, the zinc oxide will be gradually pushed to the left side of the drum 2 by the lifting plate 2001, and will be continuously lifted and thrown down. At the same time, as the hot air blows from the air inlet pipe 3 toward the air outlet 1001, when the fine zinc oxide powder is thrown down, under the action of the hot air, the small particles of zinc oxide powder that have been fully dried will pass through the filter screen 203 and fall into the discharge pipe 1002 for accumulation, while the zinc oxide powder with larger particles will be intercepted by the filter screen 203 and continue to be fully dried in the drum 2, thereby preventing the zinc oxide powder that has not yet dried and the dried zinc oxide powder from accumulating together and affecting the drying effect.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drying device for preparing zinc oxide, comprising a drying machine (1) and a drum (2); the drying machine (1) is provided with an air outlet (1001); the drying machine (1) is provided with a drum (2); a plurality of lifting plates (2001) for lifting zinc oxide powder are provided inside the drum (2); the characteristic is that: It also includes an air inlet pipe (3), a linkage assembly, a first squeezing roller (4), a second squeezing roller (5) and a screen (6); an air inlet pipe (3) for guiding hot air is installed on the dryer (1); the air inlet pipe (3) is connected to an external heat exchanger; a feed port (3001) is provided on the air inlet pipe (3); a plurality of shielding plates (3002) are provided on the air inlet pipe (3), and the drum (2) is rotatably connected to the shielding plates (3002); an outer toothed ring (2002) is provided on the drum (2), and the outer toothed ring (2002) is located between two adjacent shielding plates (3002); a linkage assembly is installed between two adjacent shielding plates (3002); a first squeezing roller (4) is installed on the linkage assembly; a second squeezing roller (5) is installed on the linkage assembly; a screen (6) for screening zinc oxide powder is installed in the drum (2), and the screen (6) is arranged to be inclined downward; Each lifting plate (2001) is arranged in an inclined manner inside the drum (2); It also comprises a second driving member (301), a squeezing rod (302) and a guide plate (303); the second driving member (301) is fixedly connected to the right side of the dryer (1), and the second driving member (301) is an electric push rod; the output end of the second driving member (301) is fixedly connected to the squeezing rod (302), and the squeezing rod (302) passes through the upper side of the air inlet pipe (3); a plurality of guide plates (303) are rotatably connected in the air inlet pipe (3) via a torsion spring; a plurality of squeezing balls are arranged on the squeezing rod (302), and each squeezing ball is in contact with the upper surface of an adjacent guide plate (303); A plurality of cutters (4001) are provided on the first squeezing roller (4).

2. A drying equipment for preparing zinc oxide according to claim 1, characterized in that: The linkage assembly comprises gear 1 (101) and gear 2 (102); the first squeezing roller (4) is rotatably connected to the cover plate (3002) of the air inlet pipe (3); gear 1 (101) is fixedly connected to the right side of the first squeezing roller (4), and the gear 1 (101) is meshed with the outer gear ring (2002) of the drum (2); the second squeezing roller (5) is rotatably connected to the cover plate (3002) of the air inlet pipe (3); gear 2 (102) is fixedly connected to the right side of the second squeezing roller (5), and the gear 2 (102) is meshed with gear 1 (101); gear 1 (101) and gear 2 (102) are both located between two adjacent cover plates (3002).

3. A drying equipment for preparing zinc oxide according to claim 1, characterized in that: A baffle (7) for preventing the zinc oxide from falling is installed in the drum (2), and the baffle (7) is in a constricted shape on one side close to the first squeezing roller (4) and the second squeezing roller (5).

4. A drying equipment for preparing zinc oxide according to claim 3, characterized in that: The screen (6) and the blocking bar (7) are arranged to be detachably connected.

5. A drying equipment for preparing zinc oxide according to claim 1, characterized in that: Each lifting plate (2001) is provided with an anti-stick coating.

6. A drying equipment for preparing zinc oxide according to claim 3, characterized in that: The dryer (1) further comprises an anti-accumulation component, which comprises a first driving member (201) and a connecting block (202); the first driving member (201) is fixedly connected to the rear side of the dryer (1), and the first driving member (201) is an electric push rod; the output end of the first driving member (201) is fixedly connected to a connecting block (202) for preventing material accumulation, and the connecting block (202) is fixedly connected to a blocking bar (7).

7. A drying equipment for preparing zinc oxide according to claim 1, characterized in that: It also includes a filter screen (203); a filter screen (203) for screening zinc oxide powder is arranged in the discharge pipe (1002) of the dryer (1).

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