Industrial potassium nitrate dissolving and impurity removing treatment equipment

Abstract

The invention provides industrial potassium nitrate dissolving and impurity removing treatment equipment, and belongs to the technical field of mixing and dissolving. Comprising a base, a mixing tank with a top opening is fixedly connected above the base, a mixing mechanism for dispersing potassium nitrate is arranged in the mixing tank, a top cover is arranged above the mixing tank, a spacing cylinder is arranged below the top cover, and a backflow gap is formed between the spacing cylinder and the inner wall of the mixing tank; lifting plates are arranged on the inner wall of the spacing cylinder in an equidistant array manner, and a plurality of filter bags are mounted on the outer side of the spacing cylinder. The filter bags used for capturing insoluble impurities are arranged on the outer side of the interval cylinder, under the action of centrifugal force generated by continuous rotation of the mixing mechanism, the insoluble impurities in a solution are thrown to the inner wall of the interval cylinder and guided into the corresponding filter bags to be captured, the whole impurity removal process is carried out in the closed mixing tank, and the impurity removal efficiency is improved. The problems of filter material blockage and effective component loss caused by advanced crystallization of potassium nitrate in a pipeline due to the fact that the output temperature of the high-temperature solution is reduced are avoided.

Description

Technical Field

[0001] This invention relates to the field of mixing and dissolving technology, and in particular to an industrial potassium nitrate dissolution and impurity removal treatment device. Background Technology

[0002] Potassium nitrate, as an important basic chemical raw material, is widely used in agricultural fertilizers, industrial glass, fireworks manufacturing and metal heat treatment. Its product purity directly affects the performance and safety of downstream applications. In particular, mud or metal oxides mixed in the raw material, if not removed, will not only reduce the quality of the final product, but also affect crystal growth during the crystallization process.

[0003] Currently, the industrial process commonly uses recrystallization to purify potassium nitrate, which mainly includes three steps: dissolution, filtration, and crystallization. First, the crude product is dissolved in a mixing tank under heating conditions. Then, the high-temperature saturated solution is transported to an external independent filtration device to separate insoluble solid impurities. Finally, high-purity products are obtained through cooling and crystallization. However, this impurity removal process relies on an external filtration system. During the pumping process, the high-temperature solution experiences heat dissipation and cooling, causing potassium nitrate to precipitate fine crystals prematurely in the pipeline or filter. These crystals are not only trapped by the filter media, resulting in the loss of effective components and reduced recovery rate, but may also clog the filter element or filter cloth, increasing filtration resistance and maintenance frequency. Therefore, this application provides an industrial potassium nitrate dissolution and impurity removal treatment device to meet the needs. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by providing an industrial potassium nitrate dissolution and impurity removal device. By setting filter bags for capturing insoluble impurities on the outside of the spacer cylinder, under the action of centrifugal force generated by the continuous rotation of the mixing mechanism, the insoluble impurities in the solution are thrown towards the inner wall of the spacer cylinder and introduced into the corresponding filter bags for capture. This solves the problem mentioned in the background art, where impurity removal relies on an external filtration system, and the high-temperature solution experiences heat dissipation and cooling during pumping, causing potassium nitrate to precipitate fine crystals in the pipeline or filter in advance, resulting in the crystals being trapped by the filter material.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An industrial potassium nitrate dissolution and impurity removal device includes a base, a mixing tank with a top opening fixedly connected to the top of the base, a mixing mechanism for dispersing potassium nitrate inside the mixing tank, a top cover on the top of the mixing tank, and a spacer cylinder below the top cover, forming a reflux gap between the spacer cylinder and the inner wall of the mixing tank; lifting plates are evenly arranged in an array on the inner wall of the spacer cylinder, and multiple filter bags are installed on the outer side of the spacer cylinder, with the inlet end of the filter bags located inside the lifting plates; a lifting assembly is provided above the base, which is used to drive the top cover to rise and fall, thereby controlling the opening and closing of the mixing tank opening, integrating dissolution and filtration within the mixing tank, avoiding the temperature loss and crystallization blockage problems caused by external solution transportation in traditional processes, and achieving efficient and continuous impurity removal treatment.

[0006] Based on the above, connecting ears are symmetrically arranged on the outer side of the spacer cylinder, and a fixing frame is fixedly connected to the top of the top cover. A first driving member is symmetrically fixedly connected above the fixing frame. The telescopic end of the first driving member passes through the top cover and is fixedly connected to the connecting ears, which is used to adjust the height of the spacer cylinder. The lifting and lowering of the spacer cylinder can be independently controlled by the first driving member, so that it can be raised to close the filtration channel during the dissolution stage and lowered to expose the channel during the filtration stage, thereby achieving impurity capture.

[0007] Furthermore, the lifting plate has an opening located on the water-facing side. A sealing plate is slidably connected inside the opening, and the top of the sealing plate passes through the lifting plate and is fixedly connected to the bottom wall of the top cover. This design allows the sealing plate to automatically disengage from the opening when the spacer cylinder descends, thereby opening the channel for impurities to enter the filter bag. When the spacer cylinder rises, it automatically seals, effectively preventing undissolved particles from entering the filter bag and causing blockage.

[0008] Optionally, the lifting assembly includes a lifting frame fixed to the top of the base, a sliding plate slidably connected between the two vertical beams of the lifting frame, a connecting beam symmetrically fixed to one side of the sliding plate, the end of the connecting beam away from the sliding plate being fixedly connected to the fixed frame, a fixed plate fixedly connected to the outside of the lifting frame and below the sliding plate, a second driving component fixedly connected to the bottom of the fixed plate, the telescopic end of the second driving component passing through the fixed plate and fixedly connected to the sliding plate, the overall lifting of the top cover and its bottom parts can be realized by driving the second driving component, which facilitates the feeding, cleaning and equipment maintenance by the staff.

[0009] Optionally, the inner wall of the mixing tank is provided with a guide section, which is located below the reflux gap. The guide section is used to guide the refluxed mixture upward. The guide section can guide and agitate the solution refluxed to the bottom of the tank to enhance the mixing intensity of the material at the bottom of the tank, prevent solid deposition and solution stratification, thereby improving the overall uniformity of dissolution and mixing.

[0010] Compared with the prior art, the present invention has at least the following beneficial effects: In the above-mentioned solution, the industrial potassium nitrate dissolution and impurity removal equipment provided in this application sets filter bags for capturing insoluble impurities on the outside of the spacer cylinder. Under the action of centrifugal force generated by the continuous rotation of the mixing mechanism, the insoluble impurities in the solution are thrown towards the inner wall of the spacer cylinder and introduced into the corresponding filter bags for capture. The entire impurity removal process is carried out in a closed mixing tank, avoiding the problem of filter material blockage and loss of effective components caused by the premature crystallization of potassium nitrate in the pipeline due to the decrease in temperature of the high-temperature solution during external transportation. The lifting plate installed inside the partition cylinder can not only guide impurities and improve the collection effect, but also reduce the phenomenon of cavitation in the center of the solution. It is worth mentioning that under the action of swirling flow, some solution enters the reflux gap from the top of the partition cylinder. With the guide part on the bottom wall of the mixing tank, the solution at the bottom of the tank can be disturbed to improve the mixing effect of the substances at the bottom of the mixing tank and prevent the solution from stratifying under the action of swirling flow. Attached Figure Description

[0011] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the separation of the top cover and the mixing tank of the present invention; Figure 3 This is a top view of the mixing tank and spacer cylinder of the present invention; Figure 4 This is a cross-sectional view of the mixing tank and the spacer cylinder of the present invention; Figure 5 This is a diagram showing the state of the spacer cylinder after it has been moved downwards according to the present invention. Figure 6 This is a three-dimensional schematic diagram of the spacer cylinder of the present invention; Figure 7 This is a schematic diagram of the sealing plate and the lifting plate of the present invention.

[0013] Reference numerals: 1. Base; 2. Mixing tank; 201. Guide section; 3. Insulation cover; 4. Circulation pipe; 5. Top cover; 6. Fixing frame; 7. Motor; 8. Central shaft; 9. Mixing mechanism; 10. Spare tube; 101. Connecting ear; 102. Lifting plate; 1021. Opening; 103. Sealing plate; 104. Filter bag; 11. First driving component; 12. Lifting assembly; 121. Lifting frame; 122. Fixing plate; 123. Second driving component; 124. Slide plate; 125. Connecting beam.

[0014] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0015] The following is a detailed description of an industrial potassium nitrate dissolution and impurity removal device provided by the present invention, in conjunction with the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0016] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0017] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0018] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0019] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0020] like Figures 1 to 5 As shown, an embodiment of the present invention provides an industrial potassium nitrate dissolution and impurity removal treatment device, including a base 1, a mixing tank 2 with a top opening fixedly connected above the base 1, a heat insulation cover 3 covering the outside of the mixing tank 2, and a circulation pipe 4 inside the heat insulation cover 3 for introducing a circulation medium (such as steam or heat transfer oil) to heat the mixture in the mixing tank 2. During the circulation process, the solution inside the mixing tank 2 can be heated to assist in the dissolution of potassium nitrate. The inlet and outlet ends of the circulation pipe 4 extend to the outside of the heat insulation cover 3 to facilitate connection with an external heat source for circulation. The mixing tank 2 is equipped with a mixing mechanism 9 for dispersing potassium nitrate. A top cover 5 is provided on the top of the mixing tank 2. The mixing mechanism 9 consists of two mixing blades. A central shaft 8 is rotatably connected inside the top cover 5. Both mixing blades are fixed on the outside of the central shaft 8. A motor 7 for driving the central shaft 8 and the mixing mechanism 9 to rotate is fixedly connected to the top of the fixing frame 6. The motor 7 drives the mixing mechanism 9 to rotate inside the mixing tank 2, which can create a hydraulic shearing effect to improve the dissolution efficiency of potassium nitrate. At the same time, under the action of centrifugal force, the impurities separated from the potassium nitrate move closer to the wall of the spacer 10, which is convenient for subsequent collection. A spacer cylinder 10 is provided below the top cover 5, forming a reflux gap between the spacer cylinder 10 and the inner wall of the mixing tank 2. A guide part 201 is provided on the inner wall of the mixing tank 2, and the guide part 201 is located below the reflux gap. It is used to guide the refluxed mixture upward. Under the action of swirling flow, the solution inside the mixing tank 2 presents a state of central depression and peripheral elevation, so that this part of the solution overflows from the top edge of the spacer cylinder 10 into the reflux gap and flows back to the bottom area of ​​the mixing tank 2 through the reflux gap. It is worth mentioning that the guide part 201 on the bottom wall of the mixing tank 2 can guide this refluxed liquid to improve the mixing effect of the substances at the bottom of the mixing tank 2 and prevent the solution from stratifying under the action of swirling flow.

[0021] In this embodiment, as Figures 3 to 7As shown, lifting plates 102 are arranged in an equidistant array on the inner wall of the spacer cylinder 10. The cross-section of the lifting plate 102 is triangular, which has a water-facing side and a water-repellent side. The slope of the water-facing side is smaller than that of the water-repellent side. The lifting plate 102 can constrain the swirling solution, causing it to swirl towards the center during stirring, thereby reducing cavitation in the center of the solution. An opening 1021 is provided inside the lifting plate 102, and the opening 1021 is located on the water-facing side. A sealing plate 103 is slidably connected inside the opening 1021. The top end of the sealing plate 103 passes through the lifting plate 102 and is fixedly connected to the bottom wall of the top cover 5. Multiple filter bags 104 are installed on the outside of the spacer cylinder 10, and the inlet end of the filter bag 104 is located inside the lifting plate 102. Under normal conditions, the top of the spacer cylinder 10 is in contact with the top cover 5. At this time, the sealing plate 103 seals the lifting plate 102. Since the sealing plate 103 is fixed under the top cover 5... The filter bag 104 is oriented and slides inside the lifting plate 102. When the spacer cylinder 10 descends, the opening 1021 is exposed, allowing the solution on the inner edge of the spacer cylinder 10 to enter the filter bag 104. Corresponding to each lifting plate 102, a top support plate and a bottom support plate are provided on the outer wall of the spacer cylinder 10. The support plates are in contact with the outer wall of the spacer cylinder 10, and the filter bag 104 is fixed between the two support plates. The two support plates can limit the filter bag 104 to prevent it from swinging in the solution, thereby affecting the reflux of the solution in the reflux gap.

[0022] In this embodiment, as Figure 4 and Figure 5 As shown, connecting ears 101 are symmetrically arranged on the outer side of the spacer cylinder 10. A fixing frame 6 is fixedly connected to the top of the top cover 5. A first driving member 11 is symmetrically fixedly connected above the fixing frame 6. The telescopic end of the first driving member 11 passes through the top cover 5 and is fixedly connected to the connecting ears 101, which is used to adjust the height of the spacer cylinder 10. The spacer cylinder 10 can be driven to rise and fall inside the mixing tank 2 by the first driving member 11. Figure 4 As shown, when potassium nitrate is not completely dissolved, the spacer 10 is located above the mixing tank 2. At this time, the opening 1021 is sealed by the sealing plate 103, which can prevent lumpy potassium nitrate from entering the filter bag 104. Figure 5 As shown, after all the potassium nitrate has dissolved, the spacer cylinder 10 is moved to the middle of the mixing tank 2, ensuring that its top edge is slightly higher than the liquid surface. At this time, the opening 1021 is open. Under the action of swirling flow, insoluble impurities that approach the inner wall of the spacer cylinder 10 enter the filter bag 104 through the opening 1021, thereby capturing the impurities. The solution then enters the reflux gap after filtration.

[0023] In this embodiment, as Figure 2As shown, a lifting assembly 12 is provided above the base 1. The lifting assembly 12 is used to drive the top cover 5 to rise and fall, thereby controlling the opening and closing of the mixing tank 2. The lifting assembly 12 includes a lifting frame 121 fixed to the top of the base 1. A sliding plate 124 is slidably connected between the two vertical beams of the lifting frame 121. A connecting beam 125 is symmetrically fixed to one side of the sliding plate 124. The end of the connecting beam 125 away from the sliding plate 124 is fixedly connected to a fixed frame 6. A fixed plate 122 is fixedly connected to the outside of the lifting frame 121 and below the sliding plate 124. A second driving member 123 is fixedly connected to the bottom of the fixed plate 122. The telescopic end of the second driving member 123 passes through the fixed plate 122 and is fixedly connected to the sliding plate 124. Figure 2 As shown, when it is necessary to open the mixing tank 2 for feeding, maintenance or observation, the second drive component 123 pushes the slide plate 124 to slide upward along the vertical beam of the lifting frame 121. At the same time, the connecting beam 125, together with the fixing frame 6, drives the top cover 5 to be lifted as a whole, thereby completely exposing the opening of the mixing tank 2. During the mixing operation, the top cover 5 is controlled to move down to close the mixing tank 2, and the mixing mechanism 9 and the spacer cylinder 10 are placed inside the mixing tank 2.

[0024] Furthermore, the first driving component 11 and the second driving component 123 are linear drive devices such as cylinders, hydraulic cylinders or electric cylinders.

[0025] Working principle of the invention: The second drive unit 123 is activated to push the slide plate 124 to slide upward along the vertical beam of the lifting frame 121. The slide plate 124 drives the top cover 5 and its integrated mixing mechanism 9, spacer cylinder 10 and other components to rise as a whole through the connecting beam 125 and the fixed frame 6, thereby fully opening the top opening of the mixing tank 2. The operator then puts industrial potassium nitrate raw material and dissolving medium into the mixing tank 2. After the feeding is completed, the second drive unit 123 is controlled to retract, driving the top cover 5 to descend as a whole until it is tightly closed on the opening of the mixing tank 2. Steam or heat transfer oil, or other heat circulation medium, is introduced into the circulation pipe 4 inside the insulation cover 3 to heat the mixing tank 2 and promote the dissolution of potassium nitrate. During this process, the motor 7 is started to drive the central shaft 8 and the mixing mechanism 9 fixed on it to rotate at high speed. The hydraulic shear force generated by stirring can accelerate the dispersion and dissolution of potassium nitrate particles. After the potassium nitrate is dissolved, the spacer cylinder 10 is lowered to the middle of the mixing tank 2 by the first drive component 11. As the spacer cylinder 10 is lowered, the fixed sealing plate 103 and the opening 1021 are relatively displaced, exposing the opening 1021. Under the centrifugal force generated by the continuous swirling flow, the insoluble impurities precipitated in the solution are thrown towards the inner wall of the spacer cylinder 10 and captured in the corresponding filter bag 104 through the opened opening 1021. The filtrate then passes through the filter bag 104 into the reflux gap between the spacer cylinder 10 and the inner wall of the mixing tank 2. At the same time, the swirling flow formed by the solution inside the spacer cylinder 10 causes the solution to be in a state of central depression and peripheral elevation. The solution overflowing from the top edge of the spacer cylinder 10 also enters the reflux gap and flows downward along the reflux gap. After being guided by the guide part 201, it flows back into the solution at the bottom of the mixing tank 2, thereby enhancing the mixing effect and preventing the solution from separating. After the impurities are removed, the motor 7 is turned off, and the spacer cylinder 10 is moved upward by the first drive component 11, which closes the opening 1021 again. Then the drain pipe at the bottom of the mixing tank 2 is opened to discharge and collect the filtered pure potassium nitrate solution.

[0026] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0027] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An industrial potassium nitrate dissolution and impurity removal device, comprising a base (1), a mixing tank (2) with a top opening fixedly connected above the base (1), a mixing mechanism (9) for dispersing potassium nitrate being provided inside the mixing tank (2), and a top cover (5) being provided above the mixing tank (2), characterized in that, A spacer cylinder (10) is provided below the top cover (5), and a reflux gap is formed between the spacer cylinder (10) and the inner wall of the mixing tank (2); The inner wall of the spacer cylinder (10) is provided with lifting plates (102) arranged in an equidistant array, and multiple filter bags (104) are installed on the outer side of the spacer cylinder (10), with the inlet end of the filter bag (104) located inside the lifting plate (102). A lifting assembly (12) is provided above the base (1). The lifting assembly (12) is used to drive the top cover (5) to rise and fall, so as to control the opening and closing of the mixing tank (2).

2. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 1, characterized in that, A connecting ear (101) is symmetrically arranged on the outer side of the spacer cylinder (10). A fixing frame (6) is fixedly connected to the top of the top cover (5). A first driving member (11) is symmetrically fixedly connected above the fixing frame (6). The telescopic end of the first driving member (11) passes through the top cover (5) and is fixedly connected to the connecting ear (101) for adjusting the height of the spacer cylinder (10).

3. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 1, characterized in that, The lifting plate (102) has a triangular cross-section, which has a water-facing side and a water-repellent side, and the slope of the water-facing side is less than the slope of the water-repellent side.

4. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 3, characterized in that, The lifting plate (102) has an opening (1021) inside, and the opening (1021) is located on the water-facing side. A sealing plate (103) is slidably connected inside the opening (1021). The top of the sealing plate (103) passes through the lifting plate (102) and is fixedly connected to the bottom wall of the top cover (5).

5. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 4, characterized in that, The outer wall of the spacer cylinder (10) is provided with a top support plate and a bottom support plate. The support plates are attached to the outer wall of the spacer cylinder (10), and the filter bag (104) is fixed between the two support plates.

6. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 1, characterized in that, The lifting assembly (12) includes a lifting frame (121) fixed to the top of the base (1), a sliding plate (124) is slidably connected between the two vertical beams of the lifting frame (121), a connecting beam (125) is symmetrically fixed to one side of the sliding plate (124), and the end of the connecting beam (125) away from the sliding plate (124) is fixedly connected to the fixing frame (6).

7. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 6, characterized in that, A fixed plate (122) is fixedly connected to the outside of the lifting frame (121) and below the slide plate (124). A second drive member (123) is fixedly connected to the bottom of the fixed plate (122). The telescopic end of the second drive member (123) passes through the fixed plate (122) and is fixedly connected to the slide plate (124).

8. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 1, characterized in that, The mixing tank (2) is provided with a guide part (201) on its inner wall, and the guide part (201) is located below the reflux gap, which is used to guide the refluxed mixture upward.

9. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 2, characterized in that, The mixing mechanism (9) consists of two mixing blades. The top cover (5) is rotatably connected to a central shaft (8). Both mixing blades are fixed on the outside of the central shaft (8). The top of the fixing frame (6) is fixedly connected to a motor (7) for driving the central shaft (8) and the mixing mechanism (9) to rotate.

10. The industrial potassium nitrate dissolution and impurity removal equipment according to claim 1, characterized in that, The mixing tank (2) is covered with a heat insulation cover (3), and a circulation pipe (4) is provided inside the heat insulation cover (3) for introducing a circulation medium to heat the mixture in the mixing tank (2). The inlet and outlet ends of the circulation pipe (4) extend to the outside of the heat insulation cover (3).

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