Efficient and energy-saving caustic soda flake concentration device

Abstract

The utility model provides an efficient and energy-saving caustic soda flake concentration device. The device comprises an outer cover; the rotary drum is arranged in the outer cover, and the mounting table is arranged on one side of the outer cover; the driving device is arranged on the mounting table; the central shaft is arranged on the axis of the rotary drum and is connected with the driving device; the central shaft supporting seat is arranged on the outer cover and is connected with two ends of the central shaft; the scraper and the discharging bin are arranged on the other side wall, adjacent to the side wall where the mounting table is located, of the outer cover; the driving device comprises a motor; the reduction gearbox is connected with the motor; and the intermittent sheave mechanism is connected with the output end of the reduction gearbox. According to the efficient and energy-saving caustic soda flake concentration device, the mounting table lifts the mounting position of the driving device to the position close to the center shaft, and the driving device is connected with the center shaft so as to control the rotary drum to do intermittent movement. The caustic soda flake machine solves the problem that a caustic soda flake machine in the prior art is difficult to efficiently manufacture thicker caustic soda flakes under the same working condition due to continuous rotation of a rotary drum.

Description

Technical Field

[0001] This utility model relates to the technical field of caustic soda flake machines, and in particular to a high-efficiency and energy-saving caustic soda flake concentration device. Background Technology

[0002] Sodium hydroxide, commonly known as caustic soda, lye, or caustic soda, with the chemical formula NaOH, is a highly corrosive strong alkali. Industrially, it is often found in flake or granular form, where it is also called "caustic soda flakes" or "solid alkali." Due to its strong alkalinity and chemical reactivity, sodium hydroxide has a wide range of industrial applications.

[0003] The commonly used equipment for manufacturing caustic soda flakes is the caustic soda flake machine. Its working principle is as follows: a rotating drum is partially immersed in molten caustic soda (generally to a depth of 10-20 mm), forming a caustic soda film with a thickness of approximately 0.6-1.2 mm on the drum's surface. Inside the drum, a pipe with nozzles continuously sprays cooling water onto the inner surface. Due to the pressure inside the drum, the cooling water is continuously forced out, forming a thin water film on the inner wall. This water film cools the caustic soda layer on the outer surface of the drum to approximately 57°C. The cooled caustic soda layer is then scraped off by a scraper from a scraper device and broken into flakes.

[0004] However, the current caustic soda flake machines have the following problems:

[0005] 1. Since the rotation speed of the drum is constant, the time the drum is immersed in the molten alkali is relatively constant, and the thickness of the alkali film adhering to the surface of the drum cannot be guaranteed.

[0006] 2. When the rotating drum just rotates to the point of separating from the molten alkali surface, the water content in the alkali film is relatively high. Since the rotation of the drum initially moves away from the molten alkali surface, while the water drips onto the molten alkali surface, the speed difference between the two makes it easier for sodium hydroxide in the alkali solution to detach from the rotating drum surface and flow back into the molten alkali with the water, reducing the thickness of the caustic soda flakes formed by subsequent cooling.

[0007] Therefore, under the same working conditions, existing caustic soda flake machines are unable to efficiently produce thicker caustic soda flakes. Utility Model Content

[0008] The purpose of this invention is to solve the problem in the prior art that caustic soda flake machines, due to the constant rotation speed of the drum, are unable to efficiently produce caustic soda flakes of the required thickness.

[0009] To achieve the above objectives, this application proposes a high-efficiency and energy-saving caustic soda concentration device, comprising: an outer casing; a rotating drum disposed inside the outer casing; an installation platform disposed on one side of the outer casing; a drive device disposed on the installation platform; a central shaft disposed on the axis of the rotating drum and connected to the drive device; a central shaft support seat disposed on the outer casing and connected to both ends of the central shaft; and a scraper and a feeding hopper disposed on another side wall of the outer casing adjacent to the side wall where the installation platform is located; wherein the drive device comprises: a motor; a gearbox connected to the motor; and an intermittent Geneva mechanism connected to the output end of the gearbox.

[0010] In the existing technology, the caustic soda flake machine uses the continuous rotation of the drum to cover the surface of the drum with molten caustic soda. During the rotation, the caustic soda is gradually cooled to form an alkali film, which is then scraped off the drum by a scraper and finally falls into the feed port to be transported to the next process.

[0011] In one embodiment of this application, the mounting platform raises the installation position of the drive unit to near the central shaft, and the drive unit is connected to the central shaft to control the drum to move intermittently. Due to the continuous rotation of the drum, under the same working conditions, existing caustic soda flake machines are unable to efficiently produce thicker caustic soda flakes.

[0012] In existing technology, the intermittent Geneva mechanism in the drive device enables the drum to perform intermittent circular motion. When the drum is controlled by the intermittent Geneva mechanism and is in a relatively stationary state, on the one hand, it can keep the drum relatively stationary when immersed in molten alkali, allowing the solution to better adhere to the surface of the drum. At the same time, it can also keep the water film formed on the surface of the drum that has detached from the molten alkali liquid relatively stationary, allowing the cooling device to accurately and continuously spray cooling medium onto the fixed position of the drum. This makes it easier to cool the water film, thereby forming an alkali film more efficiently. On the other hand, since the intermittent Geneva mechanism can control the drum to form multiple stationary points during its circular motion, especially by stopping the drum shortly after it detaches from the liquid surface, the water in the water film attached to the surface of the drum can naturally flow back to the storage tank, increasing the alkali content in the water film and further increasing the thickness of the final caustic soda flakes. Under the same working conditions, more caustic soda flakes can be produced with the same energy consumption.

[0013] As an improvement to the intermittent Geneva mechanism described in this application, the intermittent Geneva mechanism includes: a drive dial mounted on the output shaft of the gearbox; and a driven Geneva that cooperates with the drive dial and is mounted on the central shaft.

[0014] As an improvement to the outer cover described in this application, the outer cover includes: a storage trough that horizontally covers the rotating drum at the bottom and the highest position, a mounting part provided at the top of the storage trough, and a discharge port provided on the side wall of the outer cover.

[0015] Furthermore, the blade of the scraper is tangent to the surface of the rotating drum, and the blade body is tilted towards the bottom of the outer cover.

[0016] As an improvement to the above-mentioned feeding bin in this application, the feeding bin includes: a trapezoidal base plate with the upper end covered by a scraper and the inclination direction consistent with the scraper; and side plates arranged on the upper surfaces of the two waists of the trapezoidal base plate.

[0017] The beneficial effects of this application are as follows:

[0018] 1. The high-efficiency and energy-saving caustic soda flake concentration device of this application is equipped with a drive unit connected to a rotating drum. The intermittent groove wheel mechanism in the drive unit enables the rotating drum to perform intermittent circular motion. When the rotating drum is controlled by the intermittent groove wheel mechanism and is in a relatively stationary state, on the one hand, it can keep the rotating drum relatively stationary when immersed in molten alkali, so that the solution can better adhere to the surface of the rotating drum. At the same time, it can also keep the water film formed on the surface of the rotating drum that has been removed from the molten alkali liquid relatively stationary, so that the cooling device can accurately and continuously spray the cooling medium at a fixed position on the rotating drum. This makes it easier to cool the water film and thus form an alkali film more efficiently. On the other hand, since the intermittent groove wheel mechanism can control the rotating drum to form multiple stationary points when it is making circular motion, especially to stop the rotating drum shortly after it leaves the liquid surface, the water in the water film attached to the surface of the rotating drum can flow back to the storage tank naturally, increasing the alkali content in the water film and thus further increasing the thickness of the final caustic soda flakes. Under the same working conditions, more caustic soda flakes can be produced with the same energy consumption.

[0019] 2. The scraper of this application works in conjunction with the feeding hopper. At the same time, the size of the feeding hopper gradually shrinks from the inlet to the outlet. When the alkali film is scraped off by the scraper to form caustic soda flakes, the caustic soda flakes per unit area increase due to the gradual shrinkage of the outlet, making them more likely to fall off the outlet due to their own weight. Meanwhile, the large size of the inlet makes it easier to collect the caustic soda flakes scraped off by the scraper, while the small size of the outlet makes it easier to cooperate with other devices to collect the finished product. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a high-efficiency and energy-saving caustic soda concentration device according to an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the internal structure of a high-efficiency and energy-saving caustic soda concentration device according to an embodiment of this application;

[0023] Figure 3 This is a cross-sectional view of a high-efficiency and energy-saving caustic soda concentration device according to an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the outer cover structure in an embodiment of this application;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Outer cover; 11. Storage tank; 12. Mounting section; 13. Discharge port;

[0027] 2. Rotating drum;

[0028] 3. Mounting platform;

[0029] 4. Drive unit; 41. Motor; 42. Gearbox; 43. Intermittent Geneva mechanism; 431. Driving dial; 432. Driven Geneva wheel;

[0030] 5. Central axis;

[0031] 6. Central shaft support;

[0032] 7. Scraper;

[0033] 8. Feeding bin; 81. Trapezoidal bottom plate; 82. Side plate. Detailed Implementation

[0034] The following will be combined with the appendix Figures 1-4 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figures 1-4 This illustration depicts a high-efficiency and energy-saving caustic soda flake concentration device, comprising: an outer casing; a rotating drum disposed inside the outer casing; a mounting platform disposed on one side of the outer casing; a drive device disposed on the mounting platform; a central shaft disposed on the axis of the rotating drum and connected to the drive device; a central shaft support seat disposed on the outer casing and connected to both ends of the central shaft; and a scraper and a feeding hopper disposed on another side wall of the outer casing adjacent to the side wall where the mounting platform is located. The drive device comprises: a motor; a gearbox connected to the motor; and an intermittent Geneva wheel mechanism connected to the output end of the gearbox.

[0036] Please refer to Figure 1In one embodiment of this application, the outer casing 1 serves as the frame of the entire device, with a storage tank 11 at its bottom. This storage tank is located on the highest horizontal plane and covers the bottom of the rotating drum 2, used to store molten alkali. The top of the storage tank 11 has a mounting section 12 for fixing the mounting platform 3 and other components. Furthermore, a discharge port 13 is provided on one side wall of the outer casing 1 for discharging cooled and scraped caustic soda flakes.

[0037] Please refer to Figure 2 and Figure 3 In this embodiment, the rotating drum 2 is located inside the outer casing 1 and is the core component for forming the alkali film. The rotating drum 2 is connected to the drive device 4 via a central shaft 5, and both ends of the central shaft 5 are fixed to the outer casing 1 via central shaft support seats 6 to ensure the stable rotation of the rotating drum 2.

[0038] Further, please refer to Figure 2 and Figure 3 The drive unit 4, mounted on the mounting platform 3, includes a motor 41, a reduction gearbox 42, and an intermittent Geneva mechanism 43. The motor 41 reduces its speed and increases its torque through the reduction gearbox 42, then drives the intermittent Geneva mechanism 43. The intermittent Geneva mechanism 43 consists of a driving dial 431 and a driven Geneva wheel 432. The driving dial 431 is mounted on the output shaft of the reduction gearbox 42, while the driven Geneva wheel 432 is fixed to the central shaft 5. The intermittent rotation of the drum 2 is achieved through the cooperation of the driving dial 431 and the driven Geneva wheel 432.

[0039] Specifically, when the drive unit 4 is started, the motor 41 drives the reduction gearbox 42 and the intermittent Geneva wheel mechanism 43 to work, causing the drum 2 to perform intermittent circular motion in the molten alkali. When the drum 2 is stationary, the molten alkali can better adhere to the surface of the drum 2, forming a uniform alkali film. At the same time, because the drum 2 is stationary, the water film that has detached from the liquid surface can also remain relatively stable, allowing the cooling device to accurately spray the cooling medium at a fixed position on the drum 2, thereby more effectively cooling the water film and promoting the formation of the alkali film.

[0040] Further, please refer to Figure 2 and Figure 3 After the alkali film forms and reaches a certain thickness, the scraper 7 begins to work. The blade of the scraper 7 is tangential to the surface of the drum 2, and the blade body is inclined towards the bottom of the outer cover 1 to ensure that the alkali film can be scraped off smoothly. The scraped alkali flakes then fall into the feeding hopper 8. The feeding hopper 8 consists of a trapezoidal bottom plate 81 and side plates 82. The upper end of the trapezoidal bottom plate 81 covers the scraper 7, and its inclination direction is consistent with that of the scraper 7, which facilitates the collection of the scraped alkali flakes. The inclined design of the trapezoidal bottom plate 81 causes the dimensions to gradually narrow from the inlet to the outlet, which is conducive to the alkali flakes falling from the outlet 13 under their own weight, and also facilitates the collection of finished products in conjunction with other devices.

[0041] Through the above structural design, the caustic soda flake concentration device of this embodiment achieves the following technical effects:

[0042] Efficient formation of alkali film: The intermittent groove wheel mechanism 43 causes the drum 2 to rotate intermittently, which improves the adhesion of molten alkali on the surface of the drum 2, thus making it easier to form a uniform alkali film with appropriate thickness.

[0043] Increasing the thickness of caustic soda flakes: Even if the drum 2 comes to rest shortly after leaving the molten caustic soda surface, it reduces the backflow of water from the water film to the molten caustic soda, increases the caustic soda content in the water film, and thus increases the thickness of the final caustic soda flakes.

[0044] Optimized collection effect: The design of the scraper 7 and the feeding bin 8 allows the scraped caustic soda flakes to fall smoothly into the feeding bin 8, and the design of the gradually narrowing trapezoidal bottom plate 81 promotes the falling and collection of the caustic soda flakes by their own weight.

[0045] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, 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 the embodiments of this application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency and energy-saving caustic soda concentration device, characterized in that, include: The outer cover (1); a rotating drum (2) disposed inside the outer cover (1); a mounting platform (3) disposed on one side of the outer cover (1); a drive device (4) disposed on the mounting platform (3); a central shaft (5) disposed on the axis of the rotating drum (2) and connected to the drive device (4); a central shaft support (6) disposed on the outer cover (1) and connected to both ends of the central shaft (5); a scraper (7) and a feeding bin (8) disposed on the side wall of another outer cover (1) adjacent to the side wall of the mounting platform (3); wherein, the drive device (4) includes: a motor (41); a gearbox (42) connected to the motor (41) and an intermittent Geneva mechanism (43) connected to the output end of the gearbox (42).

2. The high-efficiency and energy-saving caustic soda concentration device according to claim 1, characterized in that, The intermittent Geneva mechanism (43) includes: an active dial (431) disposed on the output shaft of the gearbox (42); and a driven Geneva (432) cooperating with the active dial (431) and disposed on the central shaft (5).

3. The high-efficiency and energy-saving caustic soda concentration device according to claim 1, characterized in that, The outer cover (1) includes: a storage trough (11) located at the bottom and the highest position, which covers the drum (2), a mounting part (12) provided at the top of the storage trough (11), and a discharge port (13) provided on the side wall of the outer cover (1).

4. The high-efficiency and energy-saving caustic soda concentration device according to claim 1, characterized in that, The blade of the scraper (7) is tangent to the surface of the drum (2), and the blade body is inclined toward the bottom of the outer cover (1).

5. The high-efficiency and energy-saving caustic soda concentration device according to claim 1, characterized in that, The feeding bin (8) includes: a trapezoidal base plate (81) with its upper end covering the scraper (7) and its inclination direction being consistent with that of the scraper (7); and side plates (82) arranged on the upper surfaces of the two sides of the trapezoidal base plate (81).

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