Potassium salt dissolving equipment

Abstract

The utility model relates to potassium salt dissolving equipment which comprises a tank body (1), a stirring device (2) and a heating device (3), a steam port (11) is arranged at the top of the tank body, and a dissolving cavity (15) is formed in the tank body. The stirring device comprises a power mechanism (21) and a stirring rod (22), the power mechanism is arranged at the top of the tank body, the upper end of the stirring rod is fixedly connected with the power mechanism, the lower end of the stirring rod penetrates through the tank body and extends to be close to the bottom of the dissolving cavity, and a first stirring blade (23) is arranged at the lower end of the stirring rod. The heating device comprises a steam distribution pipe (31), the steam distribution pipe is horizontally arranged at the bottom of the dissolving cavity (15) and communicated with the steam opening, a plurality of auxiliary pipes (32) which are evenly distributed are arranged on the steam distribution pipe, one end of each auxiliary pipe is fixedly connected with the steam distribution pipe, the other end of each auxiliary pipe faces the first stirring blade, and steam nozzles communicated with the steam distribution pipe are arranged in the auxiliary pipes. A mixing port is formed in the middle of the auxiliary pipe. According to the utility model, the steam and the slurry can be fully subjected to heat exchange, and the loss is reduced.

Description

Technical Field

[0001] The utility model relates to potassium salt dissolving equipment, in particular to the structure of potassium salt dissolving equipment. Background Art

[0002] Potassium salt refers to natural potassium-containing minerals, including sylvite, kainite, carnallite, kieserite, potassium chloride, etc. Potassium salt is mainly used to manufacture potash fertilizers, and the main product is potassium chloride. Potassium chloride is usually produced by a hot dissolution and crystallization process, that is, potassium salt and a dissolution solution are added to a dissolution tank. Due to the different solubilities of potassium chloride and sodium chloride, under heating conditions, all potassium chloride in the potassium salt dissolves in the liquid phase, and sodium chloride exists in a solid phase. Solid-liquid separation is carried out to obtain a refined potassium mother liquor in the liquid phase, and the refined potassium mother liquor is cooled and crystallized to obtain potassium chloride.

[0003] When dissolving potassium salt, the existing dissolution tank usually uses steam for heating. In order to accelerate the heat exchange rate, stirring blades are also used to stir the slurry, and the steam outlet is directed towards the stirring blades. However, relying solely on the stirring action of the stirring blades, the heat exchange effect between the steam and the slurry is still not ideal. Due to the unsatisfactory heat exchange effect, the use of steam will increase, a large amount of condensed water will be supplemented into the slurry, affecting the quality of the slurry, and the steam loss is large. Moreover, the steam outlet is directed towards the stirring blade, and the impact force on the stirring blade is strong, resulting in easy damage to the stirring blade.

[0004] Moreover, the axial lifting force of the stirring blades of the existing dissolution tank is insufficient, so that large particles at the bottom cannot be suspended and uniformly dissolved in the dissolution tank, resulting in easy deposition of materials at the bottom of the tank. If the materials cannot be dissolved quickly and continuously deposit at the bottom of the tank, the effective dissolution volume of the dissolution tank will be reduced, the stirring load will be increased, and the dissolution efficiency will be lowered. If potassium chloride in the potassium salt cannot be fully dissolved, the potassium chloride content in the light phase will not meet the standard in the subsequent process, and the potassium chloride content in the heavy phase will exceed the standard, making it difficult to adjust the production process, resulting in a decrease in the output and quality of potassium chloride.

[0005] In addition, the temperature measuring element in the existing dissolution tank is prone to scaling, resulting in inaccurate temperature measurement, affecting the control of the production process, and also affecting the quality of potassium chloride products.

[0006] The first object of the utility model is to solve the problems of low heat exchange efficiency, large steam loss and high energy consumption when dissolving existing potassium salt in a dissolution tank.

[0007] The second object is to solve the problem that large particle materials in the existing dissolution tank are prone to deposit at the bottom of the tank, resulting in a decrease in the material dissolution efficiency.

[0008] The third object is to solve the problem that the temperature measuring element in the dissolution tank is prone to scaling, resulting in inaccurate temperature measurement and affecting the control of the production process. Summary of the Utility Model

[0009] To solve the above problems, the present utility model provides a potassium salt dissolving device, which includes a tank body 1, a stirring device 2 and a heating device 3. A steam port 11 and a feeding port 12 are provided at the top of the tank body 1. An overflow port 13 is provided at the upper part of the side wall of the tank body 1, and a liquid inlet 14 is provided at the lower part of the side wall, and a dissolving cavity 15 is formed inside. The stirring device 2 includes a power mechanism 21 and a stirring rod 22. The power mechanism 21 is arranged at the top of the tank body 1. The upper end of the stirring rod 22 is fixedly connected to the power mechanism 21, and the lower end passes through the tank body 1 and extends to near the bottom of the dissolving cavity 15. A first stirring blade 23 is provided at the lower end of the stirring rod 22.

[0010] The heating device 3 includes a steam distribution pipe 31. The steam distribution pipe 31 is annular and horizontally arranged at the bottom of the dissolving cavity 15 and is communicated with the steam port 11. A plurality of auxiliary pipes 32 evenly distributed in a ring shape are provided on the steam distribution pipe 31. One end of the auxiliary pipe 32 is fixedly connected to the steam distribution pipe 31, and the other end faces the first stirring blade 23. A steam spray head 33 communicating with the steam distribution pipe 31 is provided inside the auxiliary pipe 32, and a mixing port 321 is provided in the middle of the auxiliary pipe 32.

[0011] In the present utility model, by providing a plurality of auxiliary pipes 32 on the steam distribution pipe 31, providing a steam spray head 33 communicating with the steam distribution pipe 31 inside the auxiliary pipe 32, and providing a mixing port 321 in the middle of the auxiliary pipe 32, the slurry can enter the auxiliary pipe 32 through the mixing port 321 to be mixed with the steam and discharged from the end opening of the auxiliary pipe 32. This can not only promote the flow of the slurry near the mixing port 321, but also cooperate with the first stirring blade 23 to make the steam and the slurry mix more fully, achieving the purpose of sufficient heat exchange, improving the steam heat exchange efficiency, reducing the steam loss amount, and reducing the impact of the steam on the first stirring blade 23.

[0012] Preferably, a first cushion block 161 and a second cushion block 162 are provided on the bottom plate 16 of the tank body 1, so that the cross-section of the top surface of the bottom plate 16 is in a W shape. The first cushion block 161 is conical and fixedly arranged in the middle of the bottom plate 16, and the second cushion block 162 is annular and fixedly arranged on the outer periphery of the bottom plate 16.

[0013] By providing the first cushion block 161 and the second cushion block 162 on the bottom plate 16 of the dissolving tank, making the cross-section of the top surface of the bottom plate 16 in a W shape, after the material enters the dissolving tank, under the stirring action of the stirring device 2, the axial thrust generated and the action of the W-shaped structure of the top surface of the bottom plate 16 make the material at the bottom of the dissolving tank rise, causing relative movement between the solid and the liquid, making the solid-liquid mixture uniform, promoting the dissolution of large-particle materials, improving the material dissolution efficiency, and effectively improving the output and quality of potassium chloride.

[0014] Preferably, a second stirring blade 24 is provided at a position in the middle of the dissolution chamber 15 on the stirring rod 22. By providing the second stirring blade 24 on the stirring rod 22, the solid-liquid mixing efficiency can be improved, the solid-liquid mixing can be made uniform, the dissolution of large-particle materials can be promoted, and the material dissolution efficiency can be further improved.

[0015] Preferably, a deflector 17 is further included. The deflector 17 is fixedly arranged on the inner wall of the tank body 1 and extends spirally upward along the rotation direction of the first stirring blade 23. By providing the deflector 17 on the inner wall of the tank body 1, large-particle materials can be promoted to rise along the deflector 17, preventing the materials from accumulating at the bottom of the dissolution chamber 15.

[0016] Preferably, a spoiler 18 is further included. The spoiler 18 is fixedly arranged on the inner wall of the tank body 1 and is located at the upper end of the deflector 17. Through the stirring action of the stirring device 2 and the spoiler action of the spoiler 18, the uniform mixing of steam and slurry can be promoted, the heat exchange efficiency of the steam can be improved, the materials can be promoted to be evenly dispersed in the slurry, and the material dissolution efficiency can be improved.

[0017] Preferably, a heat preservation layer is provided outside the tank body 1. By providing the heat preservation layer outside the tank body 1, the heat dissipation of the tank body 1 can be reduced, the heat loss and steam consumption can be reduced, and the temperature in the dissolution tank can be accurately controlled conveniently.

[0018] Preferably, the steam nozzle 33 adopts a Venturi nozzle. The steam nozzle 33 is provided with a Venturi nozzle. The principle is that steam is ejected from the Venturi nozzle at a high speed, a low-pressure area is formed around the Venturi nozzle, and the high-speed ejected steam is mixed with the attracted slurry and then ejected, so that the steam and the slurry are fully mixed, greatly improving the heat exchange efficiency of the steam.

[0019] Preferably, a temperature measuring device 4 is further included. The temperature measuring device 4 includes a housing 41, a resistance temperature measuring rod 43 and an ultrasonic generator 42. The housing 41 is fixedly arranged at the top of the inner side wall of the tank body 1. One end of the resistance temperature measuring rod 43 is arranged in the housing 41, and the other end extends below the housing 41. The ultrasonic generator 42 is fixedly arranged in the housing 41, and the output end of the ultrasonic generator 42 faces the resistance temperature measuring rod 43.

[0020] By the ultrasonic generator 42 emitting ultrasonic waves, the materials around the resistance temperature measuring rod 43 are vibrated, avoiding the attachment of inorganic salts with crystallized precipitates on the resistance temperature measuring rod 43, thereby playing a role in preventing salt formation. Due to the vibration factor, the salt formation on the resistance temperature measuring rod 43 can also be removed, improving the temperature measurement accuracy. Description of the Drawings

[0021] Figure 1 .External structure schematic diagram of a potassium salt dissolution device;

[0022] Figure 2.Schematic diagram of the internal structure of the potassium salt dissolving equipment;

[0023] Figure 3 . Figure 2 .Schematic diagram of the A-A sectional structure;

[0024] Figure 4 .Schematic diagram of the connection structure of the steam distribution pipe and the auxiliary pipe;

[0025] Figure 5 .Schematic diagram of the temperature measuring device structure.

[0026] In the figure, 1. Tank body, 11. Steam port, 12. Feeding port, 13. Overflow port, 14. Liquid inlet, 141. Liquid inlet valve, 15. Dissolving cavity, 16. Bottom plate, 161. First cushion block, 162. Second cushion block, 17. Deflector plate, 18. Turbulence plate, 19. Slag discharge port, 191. Slag discharge valve, 10. Exhaust port, 2. Stirring device, 21. Power mechanism, 22. Stirring rod, 23. First stirring blade, 24. Second stirring blade, 3. Heating device, 31. Steam distribution pipe, 32. Auxiliary pipe, 321. Mixing port, 33. Steam nozzle, 34. Connecting pipe, 4. Temperature measuring device, 41. Shell, 42. Ultrasonic generator, 43. Resistance temperature measuring rod. Specific embodiments

[0027] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings.

[0028] As Figure 1 and Figure 2 shown, the potassium salt dissolving equipment includes a tank body 1, a stirring device 2, a heating device 3 and a temperature measuring device 4. A steam port 11, a feeding port 12 and an exhaust port 10 are provided at the top of the tank body 1. An overflow port 13 is provided at the upper part of the side wall of the tank body 1, and a liquid inlet 14 is provided at the lower part of the side wall, forming a dissolving cavity 15 inside. A slag discharge port 19 is provided on the bottom plate 16 of the tank body 1.

[0029] A liquid inlet valve 141 is provided on the liquid inlet 14, and a slag discharge valve 191 is provided on the slag discharge port 19.

[0030] A deflector plate 17 and a turbulence plate 18 are provided inside the tank body 1. The deflector plate 17 is fixedly arranged on the inner wall of the tank body 1 and extends spirally upward along the rotation direction of the first stirring blade 23.

[0031] The turbulence plate 18 is fixedly arranged on the inner wall of the tank body 1 and is located at the upper end of the deflector plate 17.

[0032] The deflector 17 can promote the large-particle materials to rise along with the slurry along the deflector 17, preventing the materials from accumulating at the bottom of the dissolution chamber 15. The slurry rising along the deflector 17 can be evenly mixed with the steam under the turbulence of the spoiler 18, improving the heat exchange efficiency of the steam. At the same time, it promotes the uniform dispersion of the materials in the slurry, improving the dissolution efficiency of the materials.

[0033] A heat-insulating layer is provided outside the tank body 1. By providing a heat-insulating layer outside the tank body 1, the heat dissipation of the tank body 1 can be reduced, heat loss and steam consumption can be reduced, and it is convenient to accurately control the temperature in the dissolution tank.

[0034] The bottom plate 16 of the tank body 1 is provided with a first cushion block 161 and a second cushion block 162, so that the cross-section of the top surface of the bottom plate 16 is in a W shape. The first cushion block 161 is conical and is fixedly arranged in the middle of the top surface of the bottom plate 16. The second cushion block 162 is annular and is fixedly arranged on the outer periphery of the top surface of the bottom plate 16.

[0035] By providing the first cushion block 161 and the second cushion block 162 on the bottom plate 16 of the dissolution tank, so that the cross-section of the top surface of the bottom plate 16 is in a W shape, after the materials enter the dissolution tank, under the axial thrust generated by the stirring of the stirring device 2 and the action of the W-shaped structure of the top surface of the bottom plate 16, the materials at the bottom of the dissolution tank rise, and the solid-liquid generates relative movement, making the solid-liquid mixture uniform, promoting the dissolution of large-particle materials, improving the dissolution efficiency of the materials, and effectively improving the output and quality of potassium chloride.

[0036] The stirring device 2 includes a power mechanism 21 and a stirring rod 22. The power mechanism 21 is a rotating motor. The rotating motor is arranged at the top of the tank body 1. The upper end of the stirring rod 22 is fixedly connected to the rotating shaft of the rotating motor, and the lower end passes through the tank body 1 and extends to near the bottom of the dissolution chamber 15. The stirring rod 22 is provided with a first stirring blade 23 and a second stirring blade 24.

[0037] The first stirring blade 23 is fixedly arranged at the lower end of the stirring rod 22. The second stirring blade 24 is fixedly arranged on the stirring rod 22 and is located in the middle of the dissolution chamber 15.

[0038] By providing the first stirring blade 23 and the second stirring blade 24 on the stirring rod 22, the solid-liquid mixing efficiency can be improved, the solid-liquid mixture can be made uniform, the dissolution of large-particle materials can be promoted, and the dissolution efficiency of the materials can be improved.

[0039] As Figure 2 and Figure 3 shown, the heating device 3 includes a steam distribution pipe 31. The steam distribution pipe 31 is annular and is horizontally arranged at the bottom of the dissolution chamber 15. It is communicated with the steam port 11 through a connecting pipe 34. A plurality of auxiliary pipes 32 are provided on the steam distribution pipe 31, and the plurality of auxiliary pipes 32 are evenly distributed in a ring along the steam distribution pipe 31.

[0040] One end of the auxiliary pipe 32 is fixedly connected to the steam distribution pipe 31, and the other end extends towards the first stirring blade 23. A steam nozzle 33 communicating with the steam distribution pipe 31 is arranged inside the auxiliary pipe 32, and a mixing port 321 is arranged on the side wall of the middle part of the auxiliary pipe 32. Refer to Figure 4 .

[0041] The steam nozzle 33 adopts a Venturi nozzle. By setting the steam nozzle 33 to adopt a Venturi nozzle, the steam is ejected at a high speed from the Venturi nozzle, forming a low-pressure area around the Venturi nozzle. Since the principle of the Venturi nozzle is the regional pressure difference and the liquid momentum acting on attracting the liquid, the high-speed jet steam and the attracted slurry are mixed and then ejected, which can make the steam and the slurry fully mixed, greatly improving the heat exchange efficiency of the steam and achieving the purpose of full heat exchange, thus improving the steam heat exchange efficiency.

[0042] As Figure 2 and Figure 5 shown, the temperature measuring device 4 includes a housing 41, a resistance temperature measuring rod 43 and an ultrasonic generator 42. The housing 41 is fixedly arranged at the top of the inner side wall of the tank body 1. One end of the resistance temperature measuring rod 43 is arranged inside the housing 41, and the other end extends below the housing 41. The ultrasonic generator 42 is fixedly arranged inside the housing 41, and the output end of the ultrasonic generator 42 faces the resistance temperature measuring rod 43, so that the ultrasonic generator 42 generates ultrasonic waves to cover the periphery of the resistance temperature measuring rod 43.

[0043] The ultrasonic generator 42 is a device for generating ultrasonic waves and can be purchased on the market, which will not be elaborated here.

[0044] The resistance temperature measuring rod 43 is a common temperature measuring device in industrial production and can be purchased on the market, which will not be elaborated here.

[0045] The utility model emits ultrasonic waves through the ultrasonic generator 42, making the materials around the resistance temperature measuring rod 43 vibrate, avoiding the attachment of inorganic salts crystallized and precipitated from the materials on the resistance temperature measuring rod 43, thus playing a role in preventing salt formation. Due to the vibration factor, the salt formation on the resistance temperature measuring rod 43 can also be removed, improving the temperature measurement accuracy.

[0046] The utility model arranges a plurality of auxiliary pipes 32 on the steam distribution pipe 31, a Venturi nozzle communicating with the steam distribution pipe 31 is arranged inside the auxiliary pipe 32, a mixing port 321 is arranged in the middle of the auxiliary pipe 32, the steam is ejected at a high speed from the Venturi nozzle, forming a low-pressure area around the Venturi nozzle, so that the high-speed jet steam and the attracted slurry are mixed and then ejected from the auxiliary pipe 32, which can make the steam and the slurry fully mixed, greatly improving the heat exchange efficiency of the steam and achieving the purpose of full heat exchange, thus improving the steam heat exchange efficiency.

[0047] By arranging a first cushion block 161 and a second cushion block 162 on the bottom plate 16 of the dissolution tank, the cross-section of the top surface of the bottom plate 16 is in a W shape. After the material enters the dissolution tank, under the axial thrust generated by the stirring of the stirring device 2 and the action of the W-shaped structure of the top surface of the bottom plate 16, the material at the bottom of the dissolution tank rises, and relative movement between the solid and the liquid occurs, making the solid-liquid mixture uniform, promoting the dissolution of large-particle materials, and improving the material dissolution efficiency.

[0048] The diversion plate 17 can promote the rise of large-particle materials along with the slurry along the diversion plate 17, prevent the materials from accumulating at the bottom of the dissolution cavity 15. The slurry rising along the diversion plate 17 can be uniformly mixed with the steam under the turbulence effect of the turbulence plate 18, improving the heat exchange efficiency of the steam. At the same time, it promotes the uniform dispersion of the materials in the slurry, improving the material dissolution efficiency.

[0049] The temperature measuring device 4 is provided with an ultrasonic generator 42. By emitting ultrasonic waves through the ultrasonic generator 42, the materials around the resistance temperature measuring rod 43 vibrate, preventing the inorganic salts separated out by the crystallization of the materials from adhering to the resistance temperature measuring rod 43, thus playing a role in preventing salt deposition. Due to the vibration factor, the salt deposition on the resistance temperature measuring rod 43 can also be removed, improving the temperature measurement accuracy.

[0050] It should be noted that the above embodiments illustrate the present invention rather than limit the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims.

Claims

1. Potassium salt dissolving equipment, characterized in that, It includes a tank body (1), a stirring device (2) and a heating device (3). At the top of the tank body (1), there are a steam port (11) and a feeding port (12). At the upper part of the side wall of the tank body (1), there is an overflow port (13). At the lower part of the side wall, there is a liquid inlet (14), and a dissolution chamber (15) is formed inside. The stirring device (2) includes a power mechanism (21) and a stirring rod (22), and the power mechanism (21) is arranged at the top of the tank body (1). The upper end of the stirring rod (22) is fixedly connected to the power mechanism (21), and the lower end passes through the tank body (1) and extends to be close to the bottom of the dissolution chamber (15). At the lower end of the stirring rod (22), there is a first stirring blade (23). The heating device (3) includes a steam distribution pipe (31). The steam distribution pipe (31) is annular and horizontally arranged at the bottom of the dissolution chamber (15), and is communicated with the steam port (11). A plurality of auxiliary pipes (32) evenly distributed in a ring shape are arranged on the steam distribution pipe (31). One end of the auxiliary pipe (32) is fixedly connected to the steam distribution pipe (31), and the other end faces the first stirring blade (23). A steam spray head (33) communicating with the steam distribution pipe (31) is arranged inside the auxiliary pipe (32), and a mixing port (321) is arranged in the middle of the auxiliary pipe (32).

2. The potassium salt dissolving device according to claim 1, wherein On the bottom plate (16) of the tank body (1), there are a first cushion block (161) and a second cushion block (162), so that the cross-section of the top surface of the bottom plate (16) is in a W shape. The first cushion block (161) is conical and fixedly arranged in the middle of the bottom plate (16). The second cushion block (162) is annular and fixedly arranged on the outer periphery of the bottom plate (16).

3. The potassium salt dissolving device according to claim 2, wherein, At the position of the stirring rod (22) in the middle of the dissolution chamber (15), there is a second stirring blade (24).

4. The potassium salt dissolving device according to claim 3, wherein, It also includes a deflector (17). The deflector (17) is fixedly arranged on the inner wall of the tank body (1) and extends spirally upward along the rotation direction of the first stirring blade (23).

5. The potassium salt dissolving device according to claim 4, wherein, It also includes a spoiler (18). The spoiler (18) is fixedly arranged on the inner wall of the tank body (1) and is located at the upper end of the deflector (17).

6. The potassium salt dissolving device according to claim 5, wherein, A heat preservation layer is arranged outside the tank body (1).

7. The potassium salt dissolving device according to claim 6, wherein, The steam spray head (33) adopts a Venturi nozzle.

8. The potassium salt dissolving device according to claim 7, wherein, It also includes a temperature measuring device (4). The temperature measuring device (4) includes a housing (41), a resistance temperature measuring rod (43) and an ultrasonic generator (42). The housing (41) is fixedly arranged at the top of the inner side wall of the tank body (1). One end of the resistance temperature measuring rod (43) is arranged inside the housing (41), and the other end extends below the housing (41). The ultrasonic generator (42) is fixedly arranged inside the housing (41), and the output end of the ultrasonic generator (42) faces the resistance temperature measuring rod (43).

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