A cooling and stirring crystallization pot

Abstract

This invention discloses a cooling and stirring crystallization pot, belonging to the field of potassium nitrate production technology. It includes a pot body with rotating stirring blades inside for stirring the solution. A jacket is fixedly installed on the outer wall of the pot body, through which cooling water is circulated to cool the solution. A scraper is also movably installed inside the pot body, moving along the inner wall to remove crystals. A discharge port is located at the bottom of the pot body, through which the crystals are discharged. This invention addresses the technical problem of slow cooling speed and low efficiency of potassium nitrate solution during crystallization.

Description

Technical Field

[0001] This invention belongs to the field of potassium nitrate production technology, specifically a cooling and stirring crystallization pot. Background Technology

[0002] Potassium nitrate, as an important inorganic chemical raw material, is widely used in gunpowder manufacturing, glass industry, match production, and agricultural fertilizers. In the production and processing of potassium nitrate, crystallization separation is a key step. Typically, a potassium nitrate solution is placed in a crystallization pot, and stirring and cooling are used to promote crystallization. To accelerate the crystallization process, continuous stirring of the solution is required during crystallization to enhance the cooling effect. Some crystallization pots are also equipped with circulating water cooling systems to increase the cooling rate, thereby improving crystal precipitation efficiency. However, existing crystallization pots have significant technical defects in practical applications: potassium nitrate crystals easily adhere to the pot wall and continue to grow during precipitation, leading to a reduced cooling rate of the solution during stirring and crystallization, low crystallization efficiency, and a prolonged production cycle. Therefore, this application aims to provide a crystallization pot that can solve the above-mentioned technical problems. Summary of the Invention

[0003] To address the above problems, this invention provides a cooling and stirring crystallization pot to solve the technical problem of slow cooling speed and low efficiency of potassium nitrate solution during crystallization.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A cooling and stirring crystallization pot includes a pot body, a stirring blade rotatably disposed inside the pot body to stir the solution, and a jacket fixedly disposed on the outer wall of the pot body, through which cooling water is circulated to cool the solution inside the pot body. The pot is also equipped with a scraper that moves along the inner wall of the pot to remove the crystals. A discharge port is provided at the bottom of the pot, through which the crystals are discharged.

[0005] As a further improvement to the above scheme, a spiral blade is provided in the interlayer, which divides the chamber in the interlayer into a spiral flow channel that facilitates the flow of cooling water from bottom to top. The outer wall of the interlayer is also equipped with inlet and outlet ports that are interconnected by flow channels.

[0006] As a further improvement to the above solution, a first flow guide is also fixedly installed inside the inner cavity of the pot body. The first flow guide is completely immersed in the solution. The first flow guide surrounds the stirring blade and is placed in the middle position. When the stirring blade rotates, a circulating water flow from bottom to top is generated in the first flow guide to accelerate the cooling of the solution.

[0007] As a further improvement to the above scheme, a number of first guide plates are fixedly installed on the inner wall of the first guide member, and a number of second guide plates are installed on the outer arm. The second guide plates are close to the bottom end of the first guide member, and the first guide plates and the second guide plates are arranged in opposite directions of rotation so that the circulating water flows in a spiral manner.

[0008] As a further improvement to the above scheme, a second guide is adjustablely provided on the outer side of the first guide. A receiving plate is also provided at the upper end of the second guide. The receiving plate is flush with the liquid surface of the solution. The circulating water flows upward over the top of the second guide and is guided to the receiving plate to spread and cool.

[0009] As a further improvement to the above solution, the top of the second guide is higher than the top surface of the receiving tray, and the top of the second guide is also provided with a first notch to facilitate the flow of water onto the receiving tray, and the bottom of the first notch is higher than the top surface of the receiving tray. The edge of the receiving tray is provided with an upwardly protruding extension edge, and several second notches are provided on the extension edge to facilitate the outflow of water. Several third guide plates are also provided on the surface of the receiving tray. The third guide plates are close to the second notches and are used to guide the water on the receiving tray so that it flows out from the second notches.

[0010] As a further improvement to the above solution, a scraper is also provided on the receiving tray. The scraper moves synchronously with the scraper blade, and a drive mechanism is connected to the scraper. The drive mechanism includes a rotating ring located above the second guide member and rotating relative to the pot body. The rotating ring and the rotating shaft of the stirring blade are mutually driven.

[0011] As a further improvement to the above solution, a slide rod is fixedly installed on the second guide member. The slide rod extends upward and a slide seat is movably installed on the outside, which is fixed to the position of the pot body. A limiting rod is installed on the slide seat to limit the slide rod.

[0012] As a further improvement to the above solution, several slots are provided on the side of the slide rod, and a slot is provided at the end of the limiting rod. A limiting block that can be inserted into the slot and locked with the slide rod is elastically installed in the slot.

[0013] As a further improvement to the above scheme, a buoyancy component is fixedly installed on the bottom surface of the receiving tray, and a counterweight is fixedly installed at the bottom end of the second guide component to control the height of the receiving tray above the water surface.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, by setting a jacket on the pot body and using spiral blades to divide the jacket into spiral flow channels, the flow path of cooling water can be lengthened, thereby improving the cooling effect on the solution in the pot body. Furthermore, by using a scraper, the crystals crystallized on the inner wall of the pot body can be scraped off during the cooling and crystallization process. This allows for the collection of crystals and avoids the problem of reduced cooling and crystallization efficiency caused by crystal growth.

[0015] In this invention, the first and second flow guides enable the solution to flow from the inside out and from the bottom up during the stirring and crystallization process. Cooling can occur as the solution flows upward and downward. The receiving tray disperses the solution flowing out from the top to the outside, allowing the solution flowing up from the bottom to have more contact with the air, thereby accelerating the cooling of the solution and achieving the effect of accelerating crystallization.

[0016] In this invention, a scraper is provided to remove the crystals that have crystallized on the receiving tray, thereby maintaining the effect of dispersing and cooling the solution on the receiving tray. The scraped solution is washed away by the impact of the water flow, which facilitates its automatic deposition and collection.

[0017] In this invention, the first and second guide plates allow water to flow in a swirling manner, facilitating the separation of crystals and solution.

[0018] In this invention, by setting up buoyancy components and counterweights, the height of the receiving tray can be adaptively adjusted. During crystallization, it can automatically adapt to the state after the solution volume changes, thereby automatically maintaining the effect of water flowing onto the receiving tray for cooling at any liquid level. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the exploded structure; Figure 3 for Figure 1 A top-view structural diagram; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction; Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 6 for Figure 5 A magnified schematic diagram of the structure at point C in the middle; Figure 7for Figure 5 Schematic diagram of the cross-sectional structure along the DD direction; Figure 8 This is a schematic diagram of the structure of the second embodiment of the present invention; Figure 9 for Figure 8 Schematic diagram of the structure of the first flow guide component; Figure 10 This is a schematic diagram of the structure of the third embodiment of the present invention; Figure 11 for Figure 10 A magnified schematic diagram of the structure at point E in the middle.

[0020] In the diagram: 1. Pot body; 2. Stirring blade; 3. Jacket; 31. Spiral blade; 4. Discharge port; 5. Scraper; 6. First guide component; 61. First guide plate; 62. Second guide plate; 7. Second guide component; 71. Receiving tray; 72. First notch; 73. Extension edge; 74. Second notch; 75. Third guide plate; 8. Scraper; 9. Rotating ring; 10. Slide rod; 101. Slot; 11. Slide seat; 12. Limiting rod; 121. Groove; 13. Limiting block; 14. Buoyancy component; 15. Counterweight. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way. Example

[0022] like Figure 1-7 As shown, the specific solution of this embodiment is: a cooling and stirring crystallization pot, including a pot body 1, and a stirring blade 2 rotatably disposed inside the pot body 1 to stir the solution, such as... Figure 1 , 2 As shown, specifically, a support frame is fixedly installed on the top of the pot body 1, and a drive motor is fixedly installed on the support frame. The output shaft of the motor is connected to the stirring blade 2. A jacket 3 is fixedly installed on the outer wall of the pot body 1. Cooling water is introduced into the jacket 3 to cool the solution in the pot body 1. More specifically, a spiral blade 31 is installed in the jacket 3. The spiral blade 31 divides the chamber in the jacket 3 into spiral channels that facilitate the flow of cooling water from bottom to top. By setting the spiral blade 31, the chamber in the spiral blade 31 can be divided into longer spiral channels, which can enable a longer heat exchange time between the cooling water and the solution in the pot body 1, thereby improving the cooling effect. In addition, water inlets and outlets that communicate with the flow channels are respectively set on the outer wall of the jacket 3. The water inlet is located on the lower side, with water entering from the lower side and exiting from the upper side. The heat of the solution is carried away by the flowing water. A scraper 5 is also movably installed inside the pot body 1. The scraper 5 moves along the inner wall of the pot body 1 to scrape off the crystals, which can prevent the crystals from growing continuously on the inner wall of the pot body 1, thereby improving the heat exchange efficiency between the pot body 1 and the cooling water and accelerating the cooling speed of the potassium nitrate solution. In addition, a discharge port 4 is provided at the bottom of the pot body 1, through which the crystals are discharged outward.

[0023] like Figure 2 , 4 As shown in Figures 5 and 7, in a preferred embodiment, a first guide member 6 is also fixedly installed inside the inner cavity of the pot body 1. Specifically, in this embodiment, the first guide member 6 is a straight pipe. During installation, the first guide member 6 is completely immersed in the solution. The first guide member 6 surrounds the stirring blade 2 and is placed in the middle position. When the stirring blade 2 rotates, a bottom-up circulating water flow is generated in the first guide member 6 to accelerate the cooling of the solution. Figure 4 As shown.

[0024] As a preferred embodiment of the above embodiments, a second guide member 7 is adjustablely disposed on the outer side of the first guide member 6. In this embodiment, the second guide member 7 is also a straight pipe structure, which is nested with the first guide member 6 and can be adjusted up and down on the outer side of the first guide member 6. A receiving tray 71 is also disposed at the upper end of the second guide member 7. (Refer to the attached drawing.) Figure 2 , 4 As shown, the receiving tray 71 is flush with the solution surface. The circulating water flows upward over the top of the second guide member 7 and is guided to the receiving tray 71 to disperse and cool. Specifically, when the stirring blade 2 rotates, it drives the potassium nitrate solution to move within the first guide member 6 and the second guide member 7, thereby forming an internal and external circulation. When the water flows upward from inside the first guide member 6 and the second guide member 7, it flows over the top surface of the second guide member 7 and onto the receiving tray 71. The surface of the receiving tray 71 is an open plane. When the potassium nitrate solution flows on the receiving tray 71, it has more contact area with the air, thereby achieving further cooling of the potassium nitrate solution and thus achieving a further cooling effect on the solution.

[0025] As a preferred embodiment of the above, more specifically, the top of the second guide member 7 is higher than the top surface of the receiving tray 71, and the height difference can be selected from 50mm to 100mm. The main purpose is to form a step between the second guide member 7 and the receiving tray 71, but it is also necessary to ensure that the water flowing upward from the second guide member 7 can pass over the top of the second guide member 7. In addition, a first notch 72 is provided at the top of the second guide member 7 to facilitate the flow of water to the receiving tray 71. The bottom of the first notch 72 is higher than the top surface of the receiving tray 71. The first notch 72 is also provided to facilitate the flow of water to the receiving tray 71, so that the potassium nitrate solution can be dispersed on the receiving tray 71. The edge of the receiving tray 71 is provided with an upwardly protruding extension edge 73. The extension edge 73 is mainly designed to block the water flow outside the receiving tray 71 and prevent it from flowing back into the receiving tray 71. Several second notches 74 are provided on the extension edge 73 to facilitate the outflow of water. Several third guide plates 75 are also provided on the surface of the receiving tray 71. The third guide plates 75 are close to the second notches 74 and are used to guide the water on the receiving tray 71 so that it flows out from the second notches 74. Specifically, when the water flows on the receiving tray 71, it flows to the second notches 74 under the guidance of the third guide plates 75 and flows back into the pot body 1 through the second notches 74 to complete the circulation.

[0026] As a preferred embodiment of the above, such as Figure 5 As shown, a scraper 8 is also provided on the receiving tray 71. Specifically, the scraper 8 moves on the surface of the receiving tray 71 to scrape up the crystals that have crystallized on the receiving tray 71. The scraped crystals are then returned to the pot body 1 for collection under the impact of the water flow. In this embodiment, the scraper 8 and the scraper 5 move synchronously. A drive mechanism is connected to the scraper 8. Specifically, the drive mechanism includes a rotating ring 9 located above the second guide member 7 and rotating relative to the pot body 1. The rotating ring 9 and the rotating shaft of the stirring blade 2 are mutually driven. Specifically, a transmission box that is mutually driven and connected to the rotating ring 9 is also provided on the support frame at the top of the pot body 1. Specifically, the scraper 8 and the scraper 5 are mounted on the rotating ring 9 through a blade holder. The rotating ring 9 rotates... The drive mechanism is mounted on the transmission box. The input end of the transmission box is connected to the drive motor of the stirring blade 2 via a belt drive mechanism. The transmission box is equipped with gears that mesh with the gear ring on the inner ring of the rotating ring 9 to transmit power. In addition, multiple support wheels are set on the support frame to support the rotating ring 9 and maintain its stable rotation. The rotation center of the rotating ring 9 coincides with the rotation center of the stirring blade 2. This arrangement allows the rotation of the rotating ring 9 to be synchronously driven by the stirring of the stirring blade 2. After the transmission box decelerates, it can drive the scraper 5 and scraper 8 to scrape and clean the inner wall of the pot body 1 and the receiving tray 71 to maintain continuous cooling efficiency and improve crystallization efficiency.

[0027] like Figure 5 , 6As shown, in a preferred embodiment, a slide rod 10 is fixedly provided on the second guide member 7. The slide rod 10 extends upward and a slide seat 11 is movably provided on the outer side, which is fixed to the position of the pot body 1. A limiting rod 12 is provided on the slide seat 11 to limit the slide rod 10. In this embodiment, the limiting rod 12 and the slide seat 11 are connected by a thread. After tightening, the slide rod 10 can be held in place to prevent the second guide member 7 from moving up and down. After unscrewing the limiting rod 12, the slide seat 11 can move up and down along the slide rod 10. At this time, the first guide member 6 and the second guide member 7 can move relative to each other, which can scrape away some crystals condensed on the second guide member 7. Example

[0028] like Figure 8 , 9 As shown, this embodiment is a further optimization of embodiment 1, and the main improvement is that, in this embodiment, a plurality of first guide plates 61 are fixedly arranged on the inner wall of the first guide member 6, and a plurality of second guide plates 62 are arranged on the outer arm. The first guide plates 61 and the second guide plates 62 are arranged in a spiral manner. The second guide plates 62 are close to the bottom end of the first guide member 6, and the first guide plates 61 and the second guide plates 62 are arranged in opposite directions of rotation, so that the circulating water flows in a spiral manner. When the water flows in a spiral manner, the potassium nitrate solution and the precipitated crystals can be more easily dispersed, and the precipitated crystals can be more easily aggregated, thereby facilitating the collection and discharge of the crystals. Example

[0029] like Figure 10 , 11As shown, in Embodiment 3 of the present invention, this embodiment is a further optimization of Embodiment 1. The main improvement is that, in this embodiment, several slots 101 are provided on the side of the slide rod 10. Specifically, the upper wall of the slot 101 is inclined. The end of the limiting rod 12 is provided with a slot 121. A limiting block 13 that can extend into the slot 101 and lock with the slide rod 10 is elastically and movably provided in the slot 121. Specifically, the limiting block 13 is slidably arranged between the limiting rod 12 and the sliding pin. A spring is provided on the slot 121 to pull the limiting block 13 to move back to its original position. When the limiting block 13 contacts the inclined side wall of the slot 101, it retracts inward, which can ensure that the slide rod 10 can move downward smoothly. When the slide rod 10 moves upward, the limiting block 13 is pulled by the spring. When the slide rod 10 is continuously extended, it will press against the slot 101, preventing the slide rod 10 from moving upward. In addition, a buoyancy component 14 is fixedly installed on the bottom surface of the receiving tray 71, and the buoyancy component 14 can be a float. A counterweight 15 is fixedly installed at the bottom end of the second guide component 7 to control the height of the receiving tray 71 above the water surface. Therefore, in this embodiment, the buoyancy component 14 is mainly used to keep the height of the liquid surface aligned with the liquid surface. Under the action of the counterweight 15, the receiving tray 71 will not exceed a high height. Moreover, under the mutual limitation of the limiting block 13 and the slot 101, the upward movement of the slide rod 10 and the receiving tray 71 is avoided. This allows the water to flow smoothly on the receiving tray 71 when it moves upward. After the liquid level in the pot body 1 drops, it can also achieve an adaptive effect to the drop in liquid level.

[0030] The specific working principle of this invention is as follows: When the cooling and stirring crystallization pot is in operation, potassium nitrate solution is first injected into the pot body 1, and stirring blade 2 is started to stir the solution. At the same time, cooling water enters through the water inlet of jacket 3, exchanges heat fully with the inner wall of pot body 1 and is discharged from the water outlet, achieving efficient cooling of the solution. As the solution temperature decreases, potassium nitrate crystals begin to precipitate. The scraper 5 continuously contacts and moves along the inner wall of pot body 1 to scrape off the adhering crystals in time and prevent them from growing on the pot wall. During the crystallization process, the first guide element 6 cooperates with the adjustable second guide element 7 to guide the circulating water to flow upward and over the top of the second guide element 7, and then disperse and cool through the receiving tray 71. The receiving tray 71 is basically flush with the liquid surface of the solution. The potassium nitrate solution cools and crystallizes on the receiving tray 71 to improve the cooling effect. The crystallized crystals are hung up by the scraper 8 and washed into the solution in the pot body 1 by the continuous water flow, thus completing the circulation of the solution. When the liquid level in the pot body 1 drops, the height of the receiving tray 71 is adjusted by adjusting the height of the slide rod 10 to keep it at basically the same height as the liquid level, so that the cooling crystallization process on the receiving tray 71 continues to be carried out efficiently. Finally, the precipitated crystals are discharged through the bottom discharge port 4.

[0031] It should be noted that, in this document, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or variations without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A cooling and stirring crystallization pot, characterized in that, The vessel includes a pot body (1), a stirring blade (2) is rotatably installed inside the pot body (1) to stir the solution, and a jacket (3) is fixedly installed on the outer wall of the pot body (1). Cooling water is introduced into the jacket (3) to cool the solution inside the pot body (1). A scraper (5) is also installed inside the pot body (1). The scraper (5) moves along the inner wall of the pot body (1) to scrape off the crystals. A discharge port (4) is provided at the bottom of the pot body (1). The crystals are discharged outward through the discharge port (4).

2. The cooling and stirring crystallization pot according to claim 1, characterized in that, The interlayer (3) is provided with spiral blades (31), which divide the chambers in the interlayer (3) into spiral channels that facilitate the flow of cooling water from bottom to top; The outer wall of the interlayer (3) is also provided with an inlet and an outlet that are interconnected by the flow channels.

3. A cooling and stirring crystallization pot according to claim 1, characterized in that, The inner cavity of the pot body (1) is also fixedly provided with a first guide (6). The first guide (6) is completely immersed in the solution. The first guide (6) surrounds the stirring blade (2) and is placed in the middle position. When the stirring blade (2) rotates, a circulating water flow from bottom to top is generated in the first guide (6) to accelerate the cooling of the solution.

4. A cooling and stirring crystallization pot according to claim 3, characterized in that, A number of first guide plates (61) are fixedly installed on the inner wall of the first guide member (6), and a number of second guide plates (62) are installed on the outer arm. The second guide plates (62) are close to the bottom end of the first guide member (6), and the first guide plates (61) and the second guide plates (62) are arranged in opposite directions of rotation so that the circulating water flows in a spiral manner.

5. A cooling and stirring crystallization pot according to claim 3, characterized in that, The outer side of the first guide (6) is adjustablely provided with a second guide (7). The upper end of the second guide (7) is also provided with a receiving plate (71). The receiving plate (71) is flush with the liquid surface of the solution. The circulating water flows upward over the top of the second guide (7) and is guided to the receiving plate (71) to spread out and cool.

6. A cooling and stirring crystallization pot according to claim 5, characterized in that, The top of the second guide (7) is higher than the top surface of the receiving plate (71), and the top of the second guide (7) is also provided with a first notch (72) to facilitate the flow of water to the receiving plate (71). The bottom of the first notch (72) is higher than the top surface of the receiving plate (71). The edge of the receiving tray (71) is provided with an upwardly protruding extension edge (73), and several second notches (74) are provided on the extension edge (73) to facilitate the outflow of water. Several third guide plates (75) are also provided on the surface of the receiving tray (71). The third guide plates (75) are close to the second notches (74) and are used to guide the water on the receiving tray (71) so that it flows out from the second notches (74).

7. A cooling and stirring crystallization pot according to claim 5, characterized in that, The receiving tray (71) is also equipped with a scraper (8), which moves synchronously with the scraper (5). A drive mechanism is connected to the scraper (8). The drive mechanism includes a rotating ring (9) located above the second guide (7) and rotating relative to the pot body (1), and the rotating ring (9) and the rotating shaft of the stirring blade (2) are mutually driven.

8. A cooling and stirring crystallization pot according to claim 5, characterized in that, The second guide (7) is fixedly provided with a slide rod (10), which extends upward and is movably provided with a slide seat (11) that is fixed to the position of the pot body (1). The slide seat (11) is provided with a limiting rod (12) for limiting the slide rod (10).

9. A cooling and stirring crystallization pot according to claim 8, characterized in that, The slide bar (10) has several slots (101) on its side, and the end of the limiting rod (12) has a slot (121). A limiting block (13) that can be inserted into the slot (101) and locked with the slide bar (10) is elastically and movably installed in the slot (121).

10. A cooling and stirring crystallization pot according to claim 9, characterized in that, A buoyancy component (14) is fixedly installed on the bottom surface of the receiving tray (71), and a counterweight (15) is fixedly installed at the bottom end of the second guide component (7) to control the height of the receiving tray (71) above the water surface.

Images