Novel sodium hydrogen sulfate crystallization kettle

Abstract

The utility model discloses a novel sodium hydrogen sulfate crystallization kettle which comprises a kettle body and a kettle cover which is arranged at the upper end of the kettle body and is provided with a feeding hole, the lower end of the kettle body is connected with a kettle bottom provided with a discharging hole, a cooling jacket is arranged on the inner wall of the kettle body, the upper end and the lower end of the cooling jacket are respectively connected with a cold water inlet and a cold water outlet, and the upper end of the kettle cover is fixedly connected with a driving motor. The output end of the driving motor is connected with a stirring shaft located in an inner cavity of the kettle body, at least one set of two oppositely-arranged stirring rods are fixedly connected to the stirring shaft in the peripheral direction, one stirring rod is connected with a scraper through a telescopic component, the other stirring rod is connected with a toothed plate through a telescopic component, and a rotating disc is arranged at the lower end of the stirring shaft. And one side, deviating from the axis of the stirring shaft, of the turntable is fixedly connected with a discharging scraper extending into the discharging hole. According to the utility model, sodium hydrogen sulfate particles can be prevented from being attached to the inner wall of the crystallization kettle, the collection quantity of the sodium hydrogen sulfate particles is improved, the discharge port can be prevented from being blocked, and the discharge speed and collection efficiency of the sodium hydrogen sulfate particles are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling crystallization equipment, in particular to a novel crystallization kettle of sodium bisulfate. Background Art

[0002] Sodium bisulfate is an important inorganic chemical raw material and inorganic solid acid catalyst, widely used in the organic synthesis of pharmaceuticals, ester compounds, and other products. The current main process for producing sodium bisulfate involves mixing dilute sulfuric acid with sodium sulfate, then transferring the mixture to a heat exchanger for a heating reaction to form sodium bisulfate. The heated sodium bisulfate solution is then passed through a separator for gas-liquid separation, achieving evaporation and concentration of the sodium bisulfate solution. The concentrated sodium bisulfate solution is then cooled and crystallized in a cooling crystallization unit to form sodium bisulfate crystalline particles.

[0003] Existing cooling crystallization devices primarily utilize an internal circulation crystallization kettle. Cooling water within a cooling jacket cools and crystallizes the sodium bisulfate concentrate through the inner wall of the crystallization kettle, after which the crystallized sodium bisulfate particles are discharged from the bottom of the crystallization kettle. However, the sodium bisulfate particles after cooling and crystallization tend to adhere to and remain on the inner wall of the crystallization kettle. This makes the sodium bisulfate particles remaining on the inner wall of the kettle difficult to clean, reducing the amount of sodium bisulfate particles collected and requiring manual cleaning, which is time-consuming and labor-intensive. Furthermore, some sodium bisulfate particles adhering to the bottom of the crystallization kettle can clog the discharge port, reducing the efficiency of sodium bisulfate particle collection. Utility Model Content

[0004] In order to solve the technical problems in the prior art that sodium bisulfate particles are easily attached to the inner wall of the crystallization kettle and are difficult to clean, the collection amount of sodium bisulfate particles is reduced, some particles attached to the bottom of the crystallization kettle cause blockage of the discharge port, and the collection efficiency of sodium bisulfate particles is reduced, the utility model provides the following technical solution.

[0005] The utility model discloses a novel crystallization kettle for sodium bisulfate, comprising a kettle body and a kettle cover provided with a feed port at the upper end of the kettle body, the lower end of the kettle body being connected to a kettle bottom provided with a discharge port, the inner wall of the kettle body being provided with a cooling jacket, the upper and lower ends of the cooling jacket being respectively connected with a cold water inlet and a cold water outlet, the upper end of the kettle cover being fixedly connected with a driving motor, the output end of the driving motor being connected with a stirring shaft located in the inner cavity of the kettle body, at least one group of two stirring rods arranged opposite to each other being fixedly connected in the peripheral direction of the stirring shaft, one of the stirring rods being connected with a scraper through a telescopic component, the other stirring rod being connected with a toothed plate through the telescopic component, the lower end of the stirring shaft being provided with a turntable, and the side of the turntable deviating from the axis of the stirring shaft being fixedly connected with a discharge scraper extending into the discharge port.

[0006] As a further technical solution, the telescopic component includes a sliding rod that slides through one end of the stirring rod and is fixedly connected to the scraper, and a limiting end located at the other end of the sliding rod, and a spring is fixedly connected between the limiting end and the stirring rod.

[0007] As a further technical solution, the bottom of the kettle is an inverted hollow conical structure, and the discharge port is connected to the bottom end of the conical structure.

[0008] As a further technical solution, the lower part of the stirring shaft is provided with an inclined scraper and an inclined tooth plate that match the bottom of the kettle.

[0009] As a further technical solution, the scraper and the tooth plate abut against the inner wall of the kettle body when they are stretched to the maximum extent under the action of the telescopic component.

[0010] As a further technical solution, the scraper and the tooth plate are made of polytetrafluoroethylene material.

[0011] The beneficial effects of the present invention are as follows: the present invention connects a scraper and a toothed plate at two relatively arranged stirring rods respectively through a telescopic component; the scraper can scrape off sodium bisulfate particles adhering to the inner wall of the crystallization kettle; the toothed plate can strongly scrape off sodium bisulfate particles that are difficult to clean, thereby preventing sodium bisulfate particles from adhering to the inner wall of the crystallization kettle and increasing the amount of sodium bisulfate particles collected. The lower end of the crystallization kettle body is connected to an inverted hollow conical structure with a discharge port, and its inverted conical structure is conducive to the discharge of sodium bisulfate particles. The lower end of the stirring shaft is connected to a discharge scraper extending into the discharge port through a turntable, which can prevent the discharge port from being blocked, thereby increasing the discharge speed and collection efficiency of the sodium bisulfate particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the external structure of the novel sodium bisulfate crystallization kettle of the present utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the kettle body of the novel sodium bisulfate crystallization kettle of the present invention;

[0014] Figure 3 This is a schematic diagram of the connection of the stirring shaft of the novel sodium bisulfate crystallization kettle of the present utility model;

[0015] Figure 4 It is a schematic diagram of the telescopic components of the novel sodium bisulfate crystallization kettle of the present utility model;

[0016] In the figure: 1-kettle body; 101-cold water inlet; 102-cold water outlet; 103-cooling jacket; 2-kettle cover; 201-feeding port; 3-kettle bottom; 301-discharging port; 302-supporting legs; 4-driving motor; 5-stirring shaft; 501-turntable; 502-discharging scraper; 6-stirring rod; 7-scraper; 8-tooth plate; 9-telescopic component; 901-sliding rod; 902-limiting end; 903-spring; 10-tilted scraper; 11-tilted tooth plate. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0018] In the description of this utility model, it should be understood that the terms "upper," "lower," and "both sides" are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the quantity of the technical features referred to.

[0019] Such as 1 and Figure 2 As shown, the present invention provides a novel sodium bisulfate crystallization kettle, comprising a kettle body 1 and a kettle cover 2 located at the upper end of the kettle body 1 and provided with a feed port 201. The lower end of the kettle body 1 is connected to a kettle bottom 3 provided with a discharge port 301. The kettle bottom 3 can be integrally formed with the kettle body 1 or sealed with a seal. A cooling jacket 103 is provided on the inner wall of the kettle body 1. The upper and lower ends of the cooling jacket 103 are respectively connected to a cold water inlet 101 and a cold water outlet 102. The cooling jacket 103 provides circulating cooling for the inner cavity of the kettle body 1. The sodium bisulfate concentrate enters the inner cavity of the kettle body 1 through the feed port 201 and is discharged from the discharge port 301 after cooling and crystallization.

[0020] The upper end of the kettle cover 2 is fixedly connected to a drive motor 4, the output end of the drive motor 4 is connected to a stirring shaft 5 located in the inner cavity of the kettle body 1, and a plurality of evenly arranged stirring rods 6 are fixedly connected to the outer circumference of the stirring shaft 5. The stirring shaft 5 is rotatably connected to the kettle cover 2, and the drive motor 4 drives the stirring shaft 5 and the stirring rod 6 to stir and cool the sodium bisulfate concentrate in the kettle body 1.

[0021] like Figure 3 and Figure 4As shown, in a preferred embodiment, there are two stirring rods 6 fixedly connected to the outer periphery of the stirring shaft 5, and the two stirring rods 6 are arranged opposite each other, one of the stirring rods 6 is connected to a scraper 7 via a telescopic component 9, and the other stirring rod 6 is connected to a tooth plate 8 via a telescopic component 9. The scraper 7 and tooth plate 8 are made of polytetrafluoroethylene. When the scraper 7 and tooth plate 8 are at their longest extension under the action of the telescopic component 9, they abut against the inner wall of the kettle body 1. When encountering relatively stubborn particles, the telescopic component 9 drives the scraper 7 or tooth plate 8 to retract to prevent violent scraping from adversely affecting the stirring shaft 5. The scraper 7 is a vertically arranged rectangular plate structure, which is used to scrape off sodium bisulfate particles attached to the inner wall of the kettle body 1. The tooth plate 8 is a vertical rectangular parallelepiped structure with teeth on one side, which can strongly scrape off difficult-to-clean sodium bisulfate particles, prevent sodium bisulfate particles from adhering to the inner wall of the crystallization kettle, and increase the collection amount of sodium bisulfate particles.

[0022] In a preferred embodiment, the telescopic member 9 includes a slide bar 901 that slides through the stirring rod 6. One end of the slide bar 901 is fixedly connected to the scraper 7. The other end of the slide bar 901 is provided with a limit end 902. A spring 903 is fixedly connected between the limit end 902 and the stirring rod 6. One end of the spring 903 is fixedly connected to the limit end 902, and the other end of the spring is fixedly connected to one side of the stirring rod 6. Under the action of the spring 903, the slide bar 901 can drive the scraper 7 to slide relative to the stirring rod 6. In the initial state, the scraper 7 abuts the inner wall of the kettle body 1. When encountering more stubborn particles, the slide bar 901 can drive the scraper 7 to move toward the stirring shaft 5. At the same time, under the action of the spring 903, the slide bar 901 can drive the scraper 7 to move toward the inner wall of the kettle body 1, scraping the particles on the inner wall of the kettle body 1 again, preventing the scraper 7 from scraping the particles attached to the inner wall of the kettle body 1 from adversely affecting the stirring shaft 5. The scraper 7 and the tooth plate 8 have different structures, but the stirring rod 6 and the telescopic component 9 connected to the two are the same, and the connection of the tooth plate 8 will not be described here.

[0023] In a preferred embodiment, the kettle bottom 3 is an inverted hollow conical structure, the upper portion of which is connected to the lower portion of the kettle body 1. The discharge port 301 is connected to the bottom end of the conical structure of the kettle bottom 3. This inverted conical structure facilitates the rapid discharge of sodium bisulfate particles. At the same time, the lower portion of the stirring shaft 5 is provided with an inclined scraper 10 and an inclined tooth plate 11 that match the kettle bottom 3. The stirring rod 6 extends downward and is provided with a rod body that matches the inclined scraper 10 and the inclined tooth plate 11. The inclined scraper 10 and the inclined tooth plate 11 are also connected to the rod body via a telescopic component 9. The inclined scraper 10 and the inclined tooth plate 11 have the same structure as the scraper 7 and the tooth plate 8, and only the installation direction is different. The inclined scraper 10 and the inclined tooth plate 11 will not be described in detail.

[0024] In a preferred embodiment, a turntable 501 is provided at the lower end of the stirring shaft 5, and the turntable 501 is located near the discharge port 301 and above the discharge port 301. A discharge scraper 502 is fixedly connected to the side of the turntable 501 that deviates from the axis of the stirring shaft 5. The discharge scraper 502 is at the edge of the turntable 501 and extends into the discharge port 301. The stirring shaft 5 drives the discharge scraper 502 to scrape and clean the discharge port 301, thereby promoting the rapid discharge of sodium bisulfate particles and preventing the discharge port 301 from clogging.

[0025] The preferred specific implementation methods and embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above implementation methods and embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments that fall within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. A novel crystallization kettle for sodium bisulfate, comprising a kettle body (1) and a kettle cover (2) located at the upper end of the kettle body (1) and provided with a feed port (201); the lower end of the kettle body (1) is connected to a kettle bottom (3) provided with a discharge port (301); the inner wall of the kettle body (1) is provided with a cooling jacket (103); the upper and lower ends of the cooling jacket (103) are respectively connected to a cold water inlet (101) and a cold water outlet (102); the upper end of the kettle cover (2) is fixedly connected to a drive motor (4); the output end of the drive motor (4) is connected to a stirring shaft (5) located in the inner cavity of the kettle body (1); and the invention is characterized in that: At least one set of two stirring rods (6) arranged opposite to each other are fixedly connected to the outer circumference of the stirring shaft (5), one of the stirring rods (6) is connected to a scraper (7) via a telescopic component (9), and the other stirring rod (6) is connected to a toothed plate (8) via the telescopic component (9). A turntable (501) is provided at the lower end of the stirring shaft (5), and a discharge scraper (502) extending into the discharge port (301) is fixedly connected to the side of the turntable (501) that deviates from the axis of the stirring shaft (5).

2. The crystallization kettle of novel sodium bisulfate according to claim 1, wherein: The telescopic component (9) comprises a sliding rod (901) that slides through one end of the stirring rod (6) and is fixedly connected to the scraper (7), and a limiting end (902) located at the other end of the sliding rod (901), and a spring (903) is fixedly connected between the limiting end (902) and the stirring rod (6).

3. The crystallization kettle of novel sodium bisulfate according to claim 1, wherein: The bottom of the kettle (3) is an inverted hollow conical structure, and the discharge port (301) is connected to the bottom end of the conical structure.

4. The crystallization kettle of novel sodium bisulfate according to claim 3, wherein: The lower part of the stirring shaft (5) is provided with an inclined scraper (10) and an inclined tooth plate (11) that match the bottom of the kettle (3).

5. The crystallization kettle of novel sodium bisulfate according to claim 1, wherein: The scraper (7) and the tooth plate (8) abut against the inner wall of the kettle body (1) when they are stretched to the maximum extent under the action of the telescopic component (9).

6. The crystallization kettle of novel sodium bisulfate according to claim 1, wherein: The scraper (7) and the tooth plate (8) are made of polytetrafluoroethylene material.

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