Industrial potassium nitrate dissolving and impurity removing treatment equipment

Abstract

The application provides an industrial potassium nitrate dissolving and impurity removing treatment equipment and belongs to the technical field of mixing and dissolving. The equipment comprises a base, a mixing tank with an open top fixedly connected to the top of the base, a mixing mechanism for dispersing potassium nitrate arranged in the mixing tank, a top cover arranged above the mixing tank, a spacer cylinder arranged below the top cover, a backflow gap formed between the spacer cylinder and the inner wall of the mixing tank, lift plates equidistantly arranged on the inner wall of the spacer cylinder, and a plurality of filter bags installed on the outer side of the spacer cylinder. The filter bags for capturing insoluble impurities are arranged on the outer side of the spacer cylinder. Under the action of the centrifugal force generated by the continuous rotation of the mixing mechanism, the insoluble impurities in the solution are thrown to the inner wall of the spacer cylinder and introduced into the corresponding filter bags to be captured. The whole impurity removing process is carried out in the closed mixing tank, so that the problem of filter material blockage and active ingredient loss caused by the early crystallization of potassium nitrate in the pipeline due to the temperature reduction of the high-temperature solution during external transmission is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mixed dissolution, in particular to an industrial potassium nitrate dissolution and impurity removal treatment equipment. BACKGROUND

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

[0003] At present, the recrystallization process is generally used in industry to purify potassium nitrate, which mainly includes three steps of 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 independent external filtration equipment to separate the insoluble solid impurities, and finally the high-purity product is obtained by cooling crystallization. However, this impurity removal process needs to rely on an external filtration system. The high-temperature solution may be cooled and cooled during pumping, resulting in the early precipitation of fine crystals of potassium nitrate in the pipeline or filter. These crystals not only cause loss of effective components and reduce recovery rate, but also may block the filter core or filter cloth, increase the filtration resistance and maintenance frequency. Therefore, the present application provides an industrial potassium nitrate dissolution and impurity removal treatment equipment to meet the needs. SUMMARY

[0004] The present application aims to solve the above problems and provides an industrial potassium nitrate dissolution and impurity removal treatment equipment. By setting a filter bag outside the spacer tube for capturing insoluble impurities, under the action of the centrifugal force generated by the continuous rotation of the mixing mechanism, the insoluble impurities in the solution are thrown to the inner wall of the spacer tube and introduced into the corresponding filter bag for capture. The problem of relying on an external filtration system for impurity removal, the high-temperature solution being cooled and cooled during pumping, and the early precipitation of fine crystals of potassium nitrate in the pipeline or filter is solved.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] The application discloses an industrial potassium nitrate dissolving and impurity removing treatment equipment, which comprises a base, a top-open mixing tank fixedly connected above the base, a mixing mechanism arranged in the mixing tank and used for dispersing potassium nitrate, a top cover arranged above the mixing tank, a spacer cylinder arranged below the top cover, and a reflux gap formed between the spacer cylinder and the inner wall of the mixing tank; a plurality of lifting plates are arranged on the inner wall of the spacer cylinder in an equidistant array, a plurality of filter bags are arranged on the outer side of the spacer cylinder, and the inlet ends of the filter bags are arranged in the lifting plates; and a lifting assembly is arranged above the base and used for driving the top cover to ascend and descend so as to control the opening and closing of the tank opening of the mixing tank, thereby integrating dissolving and filtering in the mixing tank and avoiding the problems of temperature loss and crystallization blockage caused by solution output in the traditional process, and realizing efficient and continuous impurity removing treatment.

[0007] Based on the above, connecting ears are symmetrically arranged on the outer side of the spacer cylinder, a fixing frame is fixedly connected to the top of the top cover, first driving members are symmetrically fixedly connected to the top of the fixing frame, and the telescopic ends of the first driving members are fixedly connected with the connecting ears through the top cover, so as to adjust the height of the spacer cylinder and independently control the lifting of the spacer cylinder, so that the spacer cylinder is lifted to close the filtering channel in the dissolving stage and is lowered to expose the channel in the filtering stage, and impurities are captured.

[0008] Further, an opening part is arranged in the lifting plate and located at the water-facing surface, and a blocking plate is slidably connected in the opening part and fixedly connected with the bottom wall of the top cover through the top end of the blocking plate, so that the blocking plate is automatically separated from the opening part when the spacer cylinder is lowered, so as to open the channel for impurities to enter the filter bag, and the spacer cylinder is automatically sealed when the spacer cylinder is lifted, so as to effectively prevent undissolved particles from entering the filter bag and causing blockage.

[0009] Optionally, the lifting assembly comprises a lifting frame fixed to the top of the base, a sliding plate slidably connected between the two vertical beams of the lifting frame, connecting beams symmetrically fixedly connected to one side of the sliding plate, the ends of the connecting beams away from the sliding plate fixedly connected with the fixing frame, a fixing plate fixedly connected to the outer side of the lifting frame and below the sliding plate, a second driving member fixedly connected to the bottom of the fixing plate, and the telescopic end of the second driving member fixedly connected with the sliding plate through the fixing plate, so that the lifting of the top cover and the bottom parts thereof can be realized through the driving of the second driving member, and the staff can conveniently perform feeding, cleaning and equipment maintenance.

[0010] Optionally, a guide part is arranged on the inner wall of the mixing tank and located below the reflux gap, so as to guide the refluxed mixed solution upwards, the guide part can guide and disturb the solution refluxing to the tank bottom, so as to enhance the mixing intensity of the materials at the tank bottom, prevent solid deposition and solution layering, and thus improve the uniformity of overall dissolving and mixing.

[0011] Compared with the prior art, the application has at least the following beneficial effects:

[0012] In the above scheme, the industrial potassium nitrate dissolving and impurity removing device provided by the application is characterized in that: a filter bag for capturing insoluble impurities is arranged outside the spacer tube, under the action of centrifugal force generated by continuous rotation of the mixing mechanism, the insoluble impurities in the solution are thrown to the inner wall of the spacer tube and introduced into the corresponding filter bag to be captured, and the whole impurity removing process is carried out in the closed mixing tank, so as to avoid the problems of filter material blockage and active ingredient loss caused by the precipitation of potassium nitrate in the pipeline due to the temperature reduction of the high-temperature solution during external delivery.

[0013] The lifting plate arranged inside the spacer tube not only can guide the impurities and improve the capturing effect, but also can reduce the cavitation phenomenon of the solution center. It is worth mentioning that under the action of the cyclone, part of the solution enters the backflow gap from the top of the spacer tube, and cooperates with the guide part on the bottom wall of the mixing tank to disturb the flow of the solution at the bottom of the tank, so as to improve the mixing effect of the substances at the bottom of the mixing tank and prevent the stratification of the solution under the action of the cyclone. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the relevant art to implement and use the application.

[0015] Figure 1 is a schematic diagram of the overall structure of the application;

[0016] Figure 2 is a separate schematic diagram of the top cover and the mixing tank of the application;

[0017] Figure 3 is a top view of the mixing tank and the spacer tube of the application;

[0018] Figure 4 is a sectional view of the mixing tank and the spacer tube of the application;

[0019] Figure 5 is a state diagram of the spacer tube after moving down;

[0020] Figure 6 is a three-dimensional schematic diagram of the spacer tube of the application;

[0021] Figure 7 is a schematic diagram of the blocking plate and the lifting plate of the application.

[0022] Label: 1, base; 2, mixing tank; 201, guide part; 3, heat preservation cover; 4, circulating pipe; 5, top cover; 6, fixing frame; 7, motor; 8, center shaft; 9, mixing mechanism; 10, spacer sleeve; 101, connecting lug; 102, lifting plate; 1021, opening part; 103, plugging plate; 104, filter bag; 11, first driving piece; 12, lifting assembly; 121, lifting frame; 122, fixed plate; 123, second driving piece; 124, sliding plate; 125, connecting beam.

[0023] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in the specific structure, device and environment, and those skilled in the art can adjust or modify these devices and environment according to specific needs. DETAILED DESCRIPTION

[0024] The industrial potassium nitrate dissolving and impurity removing treatment equipment provided by the present application is described in detail below in combination with the drawings and specific embodiments. It should be noted that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0025] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize such feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0026] Generally, the terms can be understood at least in part from the context in which they are used. For example, depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics, in the plural, without necessarily dictating whether more than one feature, structure, or characteristic is present. In addition, the term "based on" can be understood as not necessarily of exclusive alternatives, but can instead allow that additional or other factors can be determinative of, depending on the context.

[0027] It is to be understood that the terms "on", "over", and "above" in the application should be interpreted in the broadest context, such that "on" not only means "directly on" something, but also includes the meaning of "on" something with intervening features or layers therebetween, and "over" or "above" not only means "over" or "above" something, but also can include the meaning of "over" or "above" something without intervening features or layers therebetween.

[0028] In addition, spatially relative terms such as "under", "below", "lower", "over", "upper" and the like can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein can be interpreted accordingly.

[0029] As shown in Figures 1 to 5 An embodiment of the application provides an industrial potassium nitrate dissolving and impurity removing treatment device, which comprises a base 1, a top-open mixing tank 2 fixedly connected above the base 1, a heat preservation cover 3 sleeved outside the mixing tank 2, a circulating pipe 4 arranged inside the heat preservation cover 3, used for circulating medium (such as steam or heat conducting oil) to heat the mixed solution in the mixing tank 2, in the circulating process, the solution in the mixing tank 2 can be heated to assist the dissolution of potassium nitrate, and the inlet end and the outlet end of the circulating pipe 4 both extend to the outside of the heat preservation cover 3, so as to be connected with an external heat source to realize circulating flow;

[0030] The mixing tank 2 is internally provided with a mixing mechanism 9 for dispersing potassium nitrate, the mixing tank 2 is provided with a top cover 5 above, the mixing mechanism 9 is composed of two mixing blades, the top cover 5 is internally rotatably connected with a central shaft 8, the two mixing blades are both fixed to 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 a fixed frame 6, the motor 7 drives the mixing mechanism 9 to rotate in the mixing tank 2, so as to form a hydraulic shearing effect, to improve the dissolution efficiency of potassium nitrate, and under the action of centrifugal force, the impurities separated from the potassium nitrate are close to the cylinder wall of a spacing cylinder 10, to facilitate subsequent trapping;

[0031] The lower portion of the top cover 5 is provided with a spacing cylinder 10, and a backflow gap is formed between the spacing cylinder 10 and the inner wall of the mixing tank 2. The inner wall of the mixing tank 2 is provided with a guide portion 201 located below the backflow gap, which is used to guide the backflow of the mixed solution upward. Under the action of the rotational flow, the solution in the mixing tank 2 presents a state of central depression and peripheral elevation, so that the solution in this part overflows from the top edge of the spacing cylinder 10 into the backflow gap and backflows to the bottom area of the mixing tank 2 through the backflow gap. It is worth mentioning that the guide portion 201 on the bottom wall of the mixing tank 2 can guide the backflow of the solution, so as to improve the mixing effect of the substances at the bottom of the mixing tank 2 and prevent the solution from being stratified under the action of the rotational flow.

[0032] In the embodiment, as shown in Figures 3 to 7 , the inner wall of the spacing cylinder 10 is provided with a plurality of lifting plates 102 arranged at equal intervals. The cross section of the lifting plate 102 is triangular, which has a water-facing surface and a water-back surface. The slope of the water-facing surface is smaller than that of the water-back surface. The lifting plate 102 can constrain the rotational flow of the solution, so that it rotates to the middle during stirring, thereby reducing the cavitation phenomenon in the middle of the solution.

[0033] An opening portion 1021 is formed in the lifting plate 102 and located at the water-facing surface. A blocking plate 103 is slidably connected in the opening portion 1021. The top end of the blocking plate 103 is fixedly connected with the bottom wall of the top cover 5 through the lifting plate 102. A plurality of filter bags 104 are installed on the outer side of the spacing cylinder 10, and the inlet end of the filter bag 104 is arranged in the lifting plate 102. Under normal circumstances, the top of the spacing cylinder 10 is attached to the top cover 5, and at this time, the blocking plate 103 blocks the lifting plate 102. Since the blocking plate 103 is fixed below the top cover 5 and slides in the lifting plate 102, when the spacing cylinder 10 is lowered, the opening portion 1021 is exposed, and the solution at the edge of the inner wall of the spacing cylinder 10 can enter the filter bag 104. Corresponding to each lifting plate 102, a top support plate and a bottom support plate are arranged on the outer wall of the spacing cylinder 10. The support plates are attached to the outer wall of the spacing 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 backflow of the solution in the backflow gap.

[0034] In the embodiment, as shown in Figure 4 and Figure 5 , the outer side of the spacing cylinder 10 is symmetrically provided with a connecting lug 101. The top of the top cover 5 is fixedly connected with a fixing frame 6. The upper portion of the fixing frame 6 is symmetrically fixedly connected with a first driving member 11. The extension end of the first driving member 11 is fixedly connected with the connecting lug 101 through the top cover 5, which is used to adjust the height of the spacing cylinder 10. The first driving member 11 can drive the spacing cylinder 10 to ascend and descend in the mixing tank 2. Figure 4As shown, when the potassium nitrate is not completely dissolved, the spacer tube 10 is located at the upper part of the mixing tank 2, at this time, the opening part 1021 is sealed by the sealing plate 103, which can prevent the blocky potassium nitrate from entering the filter bag 104, as shown in the figure Figure 5 As shown, when the potassium nitrate is completely dissolved, the spacer tube 10 is moved to the middle of the mixing tank 2, and the top edge is slightly higher than the liquid level, at this time, the opening part 1021 is in an open state, under the action of the cyclone, the insoluble impurities close to the inner wall of the spacer tube 10 enter the filter bag 104 through the opening part 1021, realizing the capture of impurities, and the solution enters the reflux gap after filtration.

[0035] In this embodiment, as shown in the figure Figure 2 The upper part of the base 1 is provided with a lifting assembly 12, which is used to drive the top cover 5 to rise and fall, so as to control the opening and closing of the tank opening of the mixing tank 2, the lifting assembly 12 includes a lifting frame 121 fixed on 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 fixedly connected to one side of the sliding plate 124 in a symmetrical manner, and the end of the connecting beam 125 away from the sliding plate 124 is fixedly connected with the fixed frame 6, a fixed plate 122 is fixedly connected to the outer side of the lifting frame 121 and below the sliding plate 124, a second driving part 123 is fixedly connected to the bottom of the fixed plate 122, and the extension end of the second driving part 123 penetrates through the fixed plate 122 and is fixedly connected with the sliding plate 124, as shown in the figure Figure 2 When it is necessary to open the mixing tank 2 for feeding, maintenance or observation, the second driving part 123 pushes the sliding plate 124 to slide upward along the vertical beam of the lifting frame 121, at the same time, the connecting beam 125 cooperates with the fixed frame 6 to drive the top cover 5 to be lifted as a whole, so that the tank opening of the mixing tank 2 is completely exposed, and during the mixing operation, the top cover 5 is controlled to move downward to close the mixing tank 2, and the mixing mechanism 9 and the spacer tube 10 are placed inside the mixing tank 2.

[0036] Further, the first driving part 11 and the second driving part 123 are linear driving devices such as air cylinders, oil cylinders or electric cylinders.

[0037] The working principle of the present application is as follows:

[0038] The second driving part 123 is started to push the sliding plate 124 to slide upward along the vertical beam of the lifting frame 121, the sliding plate 124 drives the top cover 5 and the integrated mixing mechanism 9, spacer tube 10 and other components to rise as a whole through the connecting beam 125 and the fixed frame 6, so that the top tank opening of the mixing tank 2 is completely opened, and then the operator puts the industrial potassium nitrate raw material and the dissolving medium into the mixing tank 2, after the feeding is completed, the second driving part 123 is controlled to retract, and drives the top cover 5 to descend as a whole until it is tightly closed on the tank opening of the mixing tank 2.

[0039] The heat circulating medium such as steam or heat conducting oil is circulated into the circulating pipe 4 in the heat preservation cover 3 to heat the mixing tank 2, and promote the dissolution of the potassium nitrate, in the process, the motor 7 is started to drive the central shaft 8 and the mixing mechanism 9 fixed thereon to rotate at high speed, the water shearing force generated by the stirring can accelerate the dispersion and dissolution of the potassium nitrate particles, after the potassium nitrate is dissolved, the spacer tube 10 is lowered to the middle of the mixing tank 2 through the first driving part 11, with the lowering of the spacer tube 10, the fixed blocking plate 103 and the opening part 1021 are relatively displaced, so that the opening part 1021 is exposed;

[0040] Under the action of the centrifugal force generated by the continuous cyclone, the insoluble impurities separated out in the solution are thrown to the inner wall of the spacer tube 10, and enter the corresponding filter bag 104 through the opened opening part 1021 and are captured, and the filtrate enters the backflow gap between the spacer tube 10 and the inner wall of the mixing tank 2, at the same time, the cyclone formed by the solution inside the spacer tube 10 makes the solution present a state of central depression and peripheral elevation, the solution overflowing from the top edge of the spacer tube 10 also enters the backflow gap and flows downward along the backflow gap, is guided by the guide part 201 and then re-enters the solution at the bottom of the mixing tank 2, so as to enhance the mixing effect and prevent the solution from being stratified;

[0041] After the impurities are removed, the motor 7 is closed, the spacer tube 10 is lifted by the first driving part 11, the opening part 1021 is closed again, and then the liquid discharge pipeline at the bottom of the mixing tank 2 is opened, so that the filtered pure potassium nitrate solution is discharged and collected.

[0042] The present application covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be completely understood without the description of these details for those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0043] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An industrial potassium nitrate dissolving and impurity removing treatment equipment, comprising a base (1), a top-open mixing tank (2) is fixedly connected above the base (1), a mixing mechanism (9) for dispersing potassium nitrate is arranged inside the mixing tank (2), a top cover (5) is arranged above the mixing tank (2), characterized in that, The lower portion of the top cover (5) is provided with a spacer cylinder (10), and a backflow gap is formed between the spacer cylinder (10) and the inner wall of the mixing tank (2); A plurality of lifting plates (102) are arranged equidistantly on the inner wall of the spacer cylinder (10), and a plurality of filter bags (104) are mounted on the outer side of the spacer cylinder (10), and the inlet ends of the filter bags (104) are arranged inside the lifting plates (102); The upper portion of the base (1) is provided with a lifting assembly (12), and the lifting assembly (12) is used to drive the top cover (5) to ascend and descend, so as to control the opening and closing of the tank opening of the mixing tank (2); The outer side of the spacer cylinder (10) is symmetrically provided with a connecting lug (101), the top of the top cover (5) is fixedly connected with a fixed frame (6), the upper portion of the fixed frame (6) is symmetrically fixedly connected with a first driving member (11), and the telescopic end of the first driving member (11) penetrates through the top cover (5) and is fixedly connected with the connecting lug (101), so as to adjust the height of the spacer cylinder (10); The cross section of the lifting plate (102) is triangular, the triangular shape has a water-facing surface and a water-back surface, and the slope of the water-facing surface is smaller than that of the water-back surface; An opening portion (1021) is formed in the lifting plate (102), and the opening portion (1021) is located at the water-facing surface, and a blocking plate (103) is slidably connected in the opening portion (1021), and the top end of the blocking plate (103) penetrates through the lifting plate (102) and is fixedly connected with the bottom wall of the top cover (5); The lifting assembly (12) comprises a lifting frame (121) fixedly arranged on the top of the base (1), a sliding plate (124) slidably connected between two vertical beams of the lifting frame (121), and a connecting beam (125) fixedly connected to one side of the sliding plate (124) and fixedly connected with the fixed frame (6) at the end away from the sliding plate (124).

2. The industrial potassium nitrate solution impurity removal treatment apparatus according to claim 1, characterized by, 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 bags (104) are fixed between the two support plates.

3. The industrial potassium nitrate solution impurity removal treatment apparatus according to claim 1, characterized by, The outer side of the lifting frame (121) and below the sliding plate (124) are fixedly connected with a fixed plate (122), the bottom of the fixed plate (122) is fixedly connected with a second driving member (123), and the telescopic end of the second driving member (123) penetrates through the fixed plate (122) and is fixedly connected with the sliding plate (124).

4. The industrial potassium nitrate solution impurity removal treatment apparatus according to claim 1, characterized by, The inner wall of the mixing tank (2) is provided with a guide portion (201), and the guide portion (201) is located below the backflow gap, and is used to guide the backflow of the mixed liquid upward.

5. The industrial potassium nitrate solution impurity removal treatment apparatus according to claim 1, characterized by, The mixing mechanism (9) is composed of two mixing blades, a central shaft (8) is rotatably connected in the top cover (5), and the two mixing blades are fixed on the outer side of the central shaft (8), and the top of the fixed frame (6) is fixedly connected with a motor (7) used to drive the central shaft (8) and the mixing mechanism (9) to rotate.

6. The industrial potassium nitrate dissolution and impurity removal processing apparatus according to claim 1, characterized by The outer side of the mixing tank (2) is provided with a heat preservation cover (3), the heat preservation cover (3) is provided with a circulating pipe (4) inside, circulating medium is introduced into the circulating pipe (4), so as to heat the mixed liquid in the mixing tank (2), and the inlet end and the outlet end of the circulating pipe (4) extend to the outside of the heat preservation cover (3).

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