A thiocyanate evaporation kettle

Abstract

This utility model relates to the field of thiocyanate production technology, specifically to a thiocyanate evaporation kettle, including a kettle body and a top cover disposed at the upper end of the kettle body. Heating tubes are arranged parallel to each other around the inner sidewall of the kettle body. A stirring assembly is provided on the top cover. The stirring assembly is equipped with an elastic scraper component corresponding to the horizontal height of the heating tubes. The elastic scraper component is used to scrape off the crystalline scale layer on the outer surface of the heating tubes and the inner side of the kettle body next to the heating tubes. The stirring assembly drives the elastic scraper component to rotate synchronously. The elastic scraper component moves close to the outer surface of the heating tubes and the inner side of the kettle body above and below the heating tubes with the stirring action, removing the attached crystalline scale layer through mechanical scraping. This solves the problem of difficult removal of crystalline scale layer on the surface of the heating tubes and the inner wall of the kettle body in traditional evaporation kettles, reduces the decrease in heat transfer efficiency caused by scale accumulation, reduces the frequency of shutdown for cleaning, and ensures the continuity and efficiency of thiocyanate solution evaporation and concentration.

Description

Technical Field

[0001] This utility model relates to the field of thiocyanate production technology, specifically to a thiocyanate evaporation kettle. Background Technology

[0002] The thiocyanate evaporator is a key piece of equipment for processing thiocyanate solutions. During the evaporation and concentration process, the solute in the thiocyanate solution is prone to crystallize on the heating surface to form a scale layer, which leads to a significant decrease in heat transfer efficiency and requires frequent shutdowns for cleaning.

[0003] In the existing technology, the heating tubes of traditional thiocyanate evaporators are mostly plain tube structures arranged in parallel around the inner side wall of the vessel, which makes it easy for crystalline scale to adhere to the surface of the heating tubes and the inner side wall of the vessel and difficult to remove. Therefore, it is necessary to make improvements. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a thiocyanate evaporator to solve the above-mentioned problems.

[0005] The purpose of this utility model is achieved as follows: a thiocyanate evaporation kettle includes a kettle body and a top cover disposed at the upper end of the kettle body. A heating tube is arranged parallel to the inner side wall of the kettle body. A stirring assembly is provided on the top cover. An elastic wall scraping assembly is provided on the stirring assembly, which is corresponding to the horizontal height of the heating tube. The elastic wall scraping assembly is used to scrape off the crystalline scale layer on the outer surface of the heating tube and the inner side of the kettle body next to the heating tube.

[0006] Preferably, the stirring assembly includes a drive motor disposed on the upper end of the top cover, the output end of the drive motor passing through the top cover and connected to a stirring shaft, a plurality of stirring rods being disposed on the outer side of the stirring shaft, and the elastic wall scraping assembly being installed on the outer side of the stirring rods.

[0007] Preferably, the elastic scraper assembly includes a mounting ring fixedly sleeved on the outside of the stirring shaft. Connecting plates are provided on both sides of the mounting ring. An arc panel is provided at the end of the connecting plate. The arc of the arc panel is adapted to the arc of the heating tube. A polyetheretherketone pad is provided on the inner side of the arc panel. L-shaped plates are provided at the upper and lower ends of the connecting plate. A groove is opened inward on the horizontal part of the L-shaped plate. A scraper is slidably connected in the groove. A compression spring is provided between the scraper and the side wall of the groove.

[0008] Preferably, the edge of the scraper plate is wavy.

[0009] Preferably, the outer side of the arc panel and the side of the L-shaped panel are provided with inclined support beams.

[0010] This utility model has the following beneficial effects:

[0011] 1. This thiocyanate evaporator uses a stirring assembly to drive a flexible scraping assembly to rotate synchronously. The flexible scraping assembly moves close to the outer surface of the heating tube and the inner side of the vessel on both sides of the heating tube as the stirring action is performed. The mechanical scraping action removes the attached crystalline scale layer, solving the problem of difficult removal of crystalline scale layer on the surface of the heating tube and the inner wall of the vessel in traditional evaporators. This reduces the decrease in heat transfer efficiency caused by scale accumulation, reduces the frequency of shutdown for cleaning, and ensures the continuity and efficiency of thiocyanate solution evaporation and concentration.

[0012] 2. The stirring shaft drives the mounting ring to rotate, which in turn drives the arc panel and L-shaped plate to rotate synchronously through the connecting plate. The arc panel is adapted to the heating tube due to its curvature, and the polyether ether ketone pad on its inner side is tightly attached to the outer surface of the heating tube. As it rotates, it scrapes off the crystalline scale layer on the heating tube. The polyether ether ketone pad is high temperature resistant, wear resistant and does not damage the heating tube, thus extending the life of the heating tube. The scraper on the L-shaped plate is tightly attached to the inner wall of the vessel under the action of the spring. As it rotates, it scrapes off the scale layer on the inner side of the vessel. The spring can buffer the hard contact between the scraper and the vessel wall, achieving elastic adaptation and improving the scraping effect. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the stirring assembly of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the elastic wall scraping component of this utility model;

[0017] The labels in the attached diagram are:

[0018] 1. Kettle body; 2. Top cover; 3. Heating tube; 4. Stirring assembly; 41. Drive motor; 42. Stirring shaft; 43. Stirring rod; 5. Elastic scraper assembly; 51. Mounting ring; 52. Connecting plate; 53. Arc panel; 54. Polyetheretherketone pad; 55. L-shaped plate; 56. Groove; 57. Scraper; 58. Compression spring; 6. Inclined support beam. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the technical solutions in the specific embodiments of this utility model are clearly and completely described below to further illustrate this utility model. Obviously, the specific embodiments described are only a part of the embodiments of this utility model, and not all of them.

[0020] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0021] Example 1:

[0022] A thiocyanate evaporation vessel includes a vessel body 1 and a top cover 2 disposed on the upper end of the vessel body 1. A heating tube 3 is arranged parallel to the inner side wall of the vessel body 1. A stirring assembly 4 is provided on the top cover 2. An elastic wall scraping assembly 5 is provided on the stirring assembly 4, which is at the same horizontal height as the heating tube 3. The elastic wall scraping assembly 5 is used to scrape off the crystalline scale layer on the outer surface of the heating tube 3 and the inner side of the vessel body 1 next to the heating tube 3.

[0023] During use, the stirring component 4 drives the elastic scraping component 5 to rotate synchronously. The elastic scraping component 5 moves close to the outer surface of the heating tube 3 and the inner side of the vessel body 1 on both sides of the heating tube 3 with the stirring action. The attached crystalline scale layer is removed by mechanical scraping action, which solves the problem that the crystalline scale layer on the surface of the heating tube 3 and the inner wall of the vessel body 1 is difficult to remove in traditional evaporation kettles. This reduces the decrease in heat transfer efficiency caused by scale accumulation, reduces the frequency of shutdown for cleaning, and ensures the continuity and efficiency of thiocyanate solution evaporation and concentration.

[0024] In this embodiment, the stirring assembly 4 includes a drive motor 41 disposed on the upper end of the top cover 2. The output end of the drive motor 41 passes through the top cover 2 and is connected to a stirring shaft 42. Several stirring rods 43 are disposed on the outer side of the stirring shaft 42. An elastic scraping assembly 5 is installed on the outer side of the stirring rods 43. When the stirring assembly 4 is used, the drive motor 41 provides power to drive the stirring shaft 42 to rotate. The stirring shaft 42 further drives the stirring rods 43 to rotate synchronously. The stirring rods 43 stir the thiocyanate solution in the reactor on the one hand, so that the solution is heated evenly; on the other hand, by rotating, they drive the elastic scraping assembly 5 to move synchronously, so as to realize the function of scraping off the scale layer. This provides stable rotational power to the elastic scraping assembly 5 and ensures the continuity of the scraping action.

[0025] In this embodiment, the elastic scraper assembly 5 includes a mounting ring 51 fixedly sleeved on the outside of the stirring shaft 42. Connecting plates 52 are provided on both sides of the mounting ring 51. An arc-shaped panel 53 is provided at the end of each connecting plate 52, the arc of which matches the arc of the heating tube 3. A polyetheretherketone (PEEK) pad 54 is provided on the inner side of the arc-shaped panel 53. L-shaped plates 55 are provided at the upper and lower ends of the connecting plate 52. A groove 56 is formed inwardly on the horizontal part of the L-shaped plate 55. A scraper plate 57 is slidably connected within the groove 56. A compression spring 58 is provided between the scraper plate 57 and the sidewall of the groove 56. The compression spring 58 has a diameter of 3mm and a free length of 20mm. When compressed by 5-8mm, it generates a pressure of 40-64N, ensuring that the scraper plate 57 adheres tightly to the vessel wall. When using the elastic scraper assembly 5, the stirring shaft 42 drives the mounting ring 51... The ring 51 rotates, which in turn drives the arc panel 53 and the L-shaped plate 55 to rotate synchronously through the connecting plate 52. The arc panel 53 is adapted to the heating tube 3 due to its curvature. The polyether ether ketone pad 54 on its inner side is tightly attached to the outer surface of the heating tube 3. As it rotates, it scrapes off the crystalline scale layer on the heating tube 3. The polyether ether ketone pad 54 is high temperature resistant, wear resistant and does not damage the heating tube 3, thus extending the life of the heating tube 3. The high temperature range of the polyether ether ketone pad 54 is -269℃ to 260℃, which is suitable for the evaporation temperature of thiocyanate 80-120℃. The coefficient of friction is ≤0.2, which reduces the wear on the heating tube 3. The scraper plate 57 on the L-shaped plate 55 is tightly attached to the inner wall of the vessel body 1 under the elastic force of the compression spring 58. As it rotates, it scrapes off the scale layer on the inner side of the vessel. The compression spring 58 can buffer the hard contact between the scraper plate 57 and the vessel wall, achieving elastic adaptation and improving the scraping effect.

[0026] It should be noted that the stirring shaft 42 rotates at a speed of 100-200 r / min and is adjustable. The elastic scraping component 5 rotates synchronously with the stirring shaft 42. The linear velocity of the arc panel 53 and the heating tube 3 is matched, i.e., 1.2-2.5 m / s, which ensures scraping efficiency and avoids excessive wear caused by excessive speed.

[0027] In this embodiment, the edge of the scraper 57 is wavy. When scraping the scale layer on the inner wall of the vessel body 1, the wavy edge can form more shearing points compared with the straight edge, increasing the contact area and friction with the scale layer. Especially for thicker or stubborn scale layers, the force can be dispersed through the wavy structure, making it easier to peel off the scale layer.

[0028] In this embodiment, the outer side of the arc panel 53 and the side of the L-shaped plate 55 are provided with inclined support beams 6. The inclined support beams 6 connect the arc panel 53 and the L-shaped plate 55 to form a triangular support structure, which enhances the connection strength between the two and the connecting plate 52, disperses the radial force and torque generated when scraping the scale layer, reduces component deformation, avoids deformation of the connecting plate 52, arc panel 53 or L-shaped plate due to excessive force when rotating at high speed for a long time or scraping hard scale, and extends the service life of the component.

[0029] The working principle of this utility model is as follows: In use, the stirring assembly 4 drives the elastic scraper assembly 5 to rotate synchronously. Specifically, when using the stirring assembly 4, the drive motor 41 provides power to drive the stirring shaft 42 to rotate. The stirring shaft 42 further drives the stirring rod 43 to rotate synchronously. The stirring rod 43 stirs the thiocyanate solution in the reactor, ensuring uniform heating; on the other hand, its rotation drives the elastic scraper assembly 5 to move synchronously, achieving the function of scraping off the scale layer. Specifically, when using the elastic scraper assembly 5, the stirring shaft 42 drives the mounting ring 51 to rotate, which in turn drives the arc panel 53 and the L-shaped plate 55 to rotate synchronously via the connecting plate 52. The arc panel 53, due to its curvature, is adapted to the heating tube 3, and its inner polyether ether ketone... The pad 54 fits tightly against the outer surface of the heating tube 3, scraping away the crystalline scale layer on the heating tube 3 as it rotates. The polyetheretherketone pad 54 is high temperature resistant, wear resistant, and does not damage the heating tube 3, thus extending the life of the heating tube 3. The scraper 57 on the L-shaped plate 55 is tightly attached to the inner wall of the vessel body 1 under the elastic force of the compression spring 58, scraping away the scale layer on the inner side of the vessel as it rotates. The compression spring 58 can buffer the hard contact between the scraper 57 and the vessel wall, achieving elastic adaptation and improving the scraping effect. The attached crystalline scale layer is removed through mechanical scraping, solving the problem that the crystalline scale layer on the surface of the heating tube 3 and the inner wall of the vessel body 1 is difficult to remove in traditional evaporation vessels. This reduces the decrease in heat transfer efficiency caused by scale accumulation, reduces the frequency of shutdown for cleaning, and ensures the continuity and efficiency of thiocyanate solution evaporation and concentration.

[0030] It should be noted that, depending on the implementation needs, the various components described in the embodiments of this utility model can be divided into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of this utility model. The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A thiocyanate evaporation kettle comprising a kettle body (1) and a top cover (2) arranged at the upper end of the kettle body (1), the inner side wall of the kettle body (1) is arranged in parallel around with a heating pipe (3), characterized in that: The top cover (2) is provided with a stirring assembly (4), and the stirring assembly (4) is provided with an elastic scraping assembly (5) corresponding to the horizontal height of the heating tube (3). The elastic scraping assembly (5) is used to scrape off the crystalline scale layer on the outer surface of the heating tube (3) and the inner side of the vessel body (1) next to the heating tube (3).

2. The thiocyanate evaporator according to claim 1, characterized in that: The stirring assembly (4) includes a drive motor (41) disposed on the upper end of the top cover (2). The output end of the drive motor (41) passes through the top cover (2) and is connected to a stirring shaft (42). A plurality of stirring rods (43) are provided on the outer side of the stirring shaft (42). The elastic scraping assembly (5) is installed on the outer side of the stirring rods (43).

3. The thiocyanate evaporator according to claim 1, characterized in that: The elastic scraper assembly (5) includes a mounting ring (51) fixedly sleeved on the outside of the stirring shaft (42). The mounting ring (51) has connecting plates (52) on both sides. The end of the connecting plate (52) has an arc panel (53). The arc of the arc panel (53) is adapted to the arc of the heating tube (3). The inner side of the arc panel (53) has a polyether ether ketone pad (54). The upper and lower ends of the connecting plate (52) have L-shaped plates (55). The horizontal part of the L-shaped plate (55) has a groove (56) inward. A scraper plate (57) is slidably connected in the groove (56). A compression spring (58) is provided between the scraper plate (57) and the side wall of the groove (56).

4. The thiocyanate evaporator according to claim 3, characterized in that: The edge of the scraper (57) is wavy.

5. A thiocyanate evaporation kettle according to claim 3, characterized in that: The outer side of the arc panel (53) and the side of the L-shaped panel (55) are provided with inclined support beams (6).

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