Potassium fertilizer mother liquor evaporation device

Abstract

The utility model provides a kind of potassium fertilizer mother liquor evaporation device, it includes: evaporating tank;Heating component is used to heat the potassium fertilizer mother liquor in evaporating tank;First driving part is set at the top of evaporating tank;Stirring assembly, including stirring shaft and stirring paddle, stirring shaft includes driving shaft and driven shaft coaxially, driven shaft is movably arranged along axis relative to driving shaft, stirring paddle is set on driven shaft, driven shaft and stirring paddle are arranged in evaporating tank, the output end of first driving part is drivingly connected with driving shaft to make driving shaft rotate, wherein, driving shaft and driven shaft are linked to make driven shaft and driving shaft synchronous rotation, and driven shaft can be moved relative to driving shaft. The scheme can improve the stirring effect of mother liquor, improve the evaporation speed of mother liquor.

Description

Technical Field

[0001] This utility model relates to the field of potassium fertilizer mother liquor treatment technology, and more specifically, to a potassium fertilizer mother liquor evaporation device. Background Technology

[0002] The production of potash fertilizer generates a large amount of mother liquor, which is rich in potassium ions that have not been converted into crystals. If it is discharged directly without treatment, it will not only cause a huge waste of resources, but also pollute the environment.

[0003] Typically, the mother liquor needs to be transferred to an evaporator, where it is evaporated at high temperatures using heating elements. As water evaporates, the mother liquor gradually concentrates, and potassium salts precipitate out, forming solids. To increase the evaporation rate, a stirring assembly is usually used to agitate the mother liquor. However, in existing technologies, the stirring paddle is usually positioned near the bottom of the evaporator. The stirring effect primarily affects the mother liquor near the bottom, with limited effect on the mother liquor in the upper part of the evaporator. This results in poor flowability of the mother liquor in the upper part of the evaporator, low heat transfer efficiency, and a reduced overall evaporation rate. Utility Model Content

[0004] The main purpose of this invention is to provide a potassium fertilizer mother liquor evaporation device to solve the problem that in the prior art, the stirring paddle only has a good stirring effect on the mother liquor near the bottom of the evaporation tank, but has a limited stirring effect on the mother liquor in the upper part of the evaporation tank, resulting in poor fluidity of the mother liquor in the upper part and affecting the evaporation speed of the mother liquor.

[0005] To achieve the above objectives, this utility model provides a potassium fertilizer mother liquor evaporation device, comprising: an evaporation tank; a heating component for heating the potassium fertilizer mother liquor in the evaporation tank; a first driving component disposed at the top of the evaporation tank; and a stirring assembly comprising a stirring shaft and a stirring paddle. The stirring shaft includes a coaxial driving shaft and a driven shaft, the driven shaft being movably disposed relative to the driving shaft along the axis, the stirring paddle being disposed on the driven shaft, the driven shaft and the stirring paddle passing through the evaporation tank, the output end of the first driving component being drivenly connected to the driving shaft to rotate the driving shaft, wherein the driving shaft and the driven shaft are linked to rotate synchronously with the driving shaft, and the driven shaft is movable relative to the driving shaft.

[0006] Furthermore, the potassium fertilizer mother liquor evaporation device also includes: a mounting frame, mounted on the outer periphery of the evaporator, with the first driving component mounted on the mounting frame; a guide cylinder, mounted on the mounting frame, sleeved on the outer periphery of the driven shaft, with an inclined structure on one of the inner wall of the guide cylinder and the outer wall of the driven shaft, and a protrusion on the other of the inner wall of the guide cylinder and the outer wall of the driven shaft, the protrusion engaging with the inclined structure to allow the driven shaft to move relative to the driving shaft when the driven shaft rotates.

[0007] Furthermore, an annular inclined groove is provided on the inner side wall of the guide cylinder, forming an inclined structure. A protrusion is provided on the outer side wall of the driven shaft, which is movably inserted into the annular inclined groove and presses against the groove wall of the annular inclined groove.

[0008] Furthermore, a guide groove is provided on one of the driving shaft and the driven shaft, the guide groove extends along the axial direction of the stirring shaft, and a guide block is provided on the other of the driving shaft and the driven shaft, the guide block slidingly engaging with the guide groove; the end walls at both ends of the guide groove in the extending direction can respectively engage with the guide block to prevent the guide block from coming out of the guide groove.

[0009] Furthermore, the potash fertilizer mother liquor evaporation device also includes: an evaporation box having a receiving cavity and a steam outlet communicating with the receiving cavity; a fixing component including a limiting plate and a support frame located inside the evaporation box, the limiting plate being connected to the side wall of the evaporation box to divide the receiving cavity into an evaporation chamber and a heating chamber, the evaporation chamber communicating with the steam outlet, the support frame being located at the bottom end of the limiting plate, the limiting plate having a limiting hole, a first driving component located inside the evaporation chamber, the support frame and heating component located inside the heating chamber, the evaporation tank being installed inside the limiting hole, the top end of the evaporation tank being located inside the evaporation chamber, the bottom end of the evaporation tank being located inside the heating chamber and supported by the support frame at the bottom end of the evaporation tank, and the heating component being able to heat the bottom end of the evaporation tank.

[0010] Furthermore, the evaporator is also equipped with a ventilation hole, which is connected to the heating chamber. The heating component includes a flame-spraying assembly, which is located inside the heating chamber and sprays flames toward the bottom of the evaporator.

[0011] Furthermore, one of the limiting plate and the evaporator is provided with a plug-in block, which has a plug hole, and the other of the limiting plate and the evaporator is provided with a plug-in protrusion. The plug hole and the plug-in protrusion are plugged in to restrict the rotation of the evaporator.

[0012] Furthermore, the insertion protrusion is provided with a locking hole, and the insertion block is provided with a locking member. The locking member includes an abutment and an adjusting member. The abutment is movably disposed relative to the insertion block along the radial direction of the locking hole, and the adjusting member is rotatably disposed on the insertion block. The adjusting member is threadedly connected to the abutment so that the abutment has a locking position that extends into the locking hole and an unlocking position that disengages from the locking hole.

[0013] Furthermore, the evaporator includes a box body and a box door, with a side opening in the box body and the box door hinged to the box body. A first drive unit and a stirring assembly are located inside the box body. The first drive unit is vertically and vertically mounted on the box body so that the stirring paddle of the stirring assembly has a working position that extends into the evaporator and an idle position that extends out of the evaporator.

[0014] Furthermore, the potash fertilizer mother liquor evaporation device also includes: a mounting frame located inside the housing, the mounting frame being liftably mounted on the housing, a first driving component mounted on the mounting frame; and a second driving component mounted on the housing, the output shaft of the second driving component being provided with a screw, the screw being threadedly connected to the mounting frame to drive the mounting frame to lift.

[0015] By applying the technical solution of this utility model, the linkage design of the driving shaft and driven shaft of the stirring shaft enables the stirring paddle to stir the mother liquor at different height positions in the evaporation tank, which improves the overall fluidity of the mother liquor, increases the heat transfer efficiency, and thus enhances the evaporation speed and evaporation effect of the mother liquor. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This invention provides a schematic diagram of the internal structure of the evaporation box of the potassium fertilizer mother liquor evaporation device.

[0018] Figure 2 This invention provides a schematic diagram showing the structure of the first drive component and the stirring assembly of the potassium fertilizer mother liquor evaporation device.

[0019] Figure 3 This invention provides a schematic diagram showing the structure of the mixing shaft and guide cylinder of the potassium fertilizer mother liquor evaporation device.

[0020] Figure 4 A schematic diagram of the structure of the potassium fertilizer mother liquor evaporation device provided by this utility model is shown;

[0021] Figure 5 A partial structural schematic diagram of the potassium fertilizer mother liquor evaporation device provided by this utility model is shown;

[0022] Figure 6 An exploded view of the plug-in block and plug-in protrusion provided by this utility model is shown.

[0023] Figure 7 A cross-sectional view of the plug-in block provided by this utility model is shown.

[0024] The above figures include the following reference numerals:

[0025] 10. Evaporator;

[0026] 20. Heating components;

[0027] 30. First driving component;

[0028] 40. Stirring assembly; 41. Stirring shaft; 411. Drive shaft; 4111. Guide block; 412. Driven shaft; 4121. Protrusion; 4122. Guide groove; 42. Stirring paddle;

[0029] 50. Mounting bracket; 51. Guide cylinder; 511. Inclined structure;

[0030] 60. Evaporator; 601. Steam vent; 602. Evaporation chamber; 603. Heating chamber; 604. Ventilation vent; 61. Chamber body; 611. Fixing block; 62. Chamber door;

[0031] 70. Fixing component; 71. Limiting plate; 711. Limiting hole; 72. Support frame;

[0032] 81. Connecting block; 811. Insertion hole; 812. Mounting cavity; 8121. Guide rod; 813. Radial sliding hole; 82. Connecting protrusion; 821. Locking hole;

[0033] 90. Locking component; 91. Abutment component; 911. Guide plate; 92. Adjusting component;

[0034] 100. Second driving component; 101. Screw. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] like Figures 1 to 7 As shown, this utility model embodiment provides a potassium fertilizer mother liquor evaporation device, which includes: an evaporation tank 10; a heating component 20 for heating the potassium fertilizer mother liquor in the evaporation tank 10; a first driving component 30 disposed on the top of the evaporation tank 10; and a stirring assembly 40, including a stirring shaft 41 and a stirring paddle 42. The stirring shaft 41 includes a coaxial driving shaft 411 and a driven shaft 412. The driven shaft 412 is movably disposed relative to the driving shaft 411 along the axis. The stirring paddle 42 is disposed on the driven shaft 412. The driven shaft 412 and the stirring paddle 42 pass through the evaporation tank 10. The output end of the first driving component 30 is drivenly connected to the driving shaft 411 to make the driving shaft 411 rotate. The driving shaft 411 and the driven shaft 412 are linked to make the driven shaft 412 rotate synchronously with the driving shaft 411, and the driven shaft 412 can move relative to the driving shaft 411.

[0037] By applying the technical solution of this utility model, through the linkage design of the driving shaft 411 and the driven shaft 412 of the stirring shaft 41, the stirring paddle 42 can stir the mother liquor at different height positions in the evaporator 10, which improves the overall fluidity of the mother liquor, increases the heat transfer efficiency, and thus improves the evaporation speed and evaporation effect of the mother liquor.

[0038] Understandably, when evaporating the mother liquor, the mother liquor is poured into the evaporation tank 10, and the first drive unit 30 is activated. The first drive unit 30 drives the drive shaft 411 in the stirring shaft 41 to rotate. Since there is a linkage between the drive shaft 411 and the driven shaft 412, the driven shaft 412 drives the stirring paddle 42 to rotate synchronously with the drive shaft 411. At the same time, the driven shaft 412 drives the stirring paddle 42 to move relative to the drive shaft 411 along the axial direction of the drive shaft 411. Simultaneously, the heating component 20 is activated to heat the mother liquor in the evaporation tank 10.

[0039] In this design, the heating element 20 can be an electric heater, which can be directly installed on the side wall or bottom wall of the evaporator 10. Alternatively, a coil can be installed inside the evaporator 10, and a heating medium can be injected into the coil to form the heating element 20 for heating the mother liquor inside the evaporator 10.

[0040] like Figures 1 to 3 As shown, in this scheme, the first driving component 30 can be installed on the evaporator 10 or can be installed independently of the evaporator 10.

[0041] In this embodiment, the evaporator 10 has a top-opening tank structure. The potassium fertilizer mother liquor evaporation device further includes: a mounting frame 50, mounted on the outer periphery of the evaporator 10, with a first driving member 30 mounted on the mounting frame 50; and a guide cylinder 51, mounted on the mounting frame 50, sleeved around the outer periphery of the driven shaft 412. An inclined structure 511 is provided on one of the inner wall of the guide cylinder 51 and the outer wall of the driven shaft 412, and a protrusion 4121 is provided on the other. The protrusion 4121 presses against the inclined structure 511, so that when the driven shaft 412 rotates, it moves relative to the driving shaft 411. The guide cylinder 51 enables the driven shaft 412 to move relative to the driving shaft 411 along its axial direction as the driving shaft 411 rotates.

[0042] Specifically, as the driven shaft 412 rotates, the protrusion 4121 slides along the inclined structure 511, allowing the driven shaft 412 to move along the axial direction of the driving shaft 411.

[0043] In this embodiment, the guide cylinder 51 is a cylindrical structure coaxial with the driven shaft 412. An annular groove is provided on the inner wall of the guide cylinder 51, forming an inclined structure 511. A protrusion 4121 is provided on the outer wall of the driven shaft 412, movably passing through the annular groove and pressing against the groove wall. The annular groove allows the driven shaft 412 to reciprocate along the axis of the drive shaft 411. Furthermore, the annular groove and the protrusion 4121 facilitate machining.

[0044] Furthermore, a guide groove 4122 is provided on one of the drive shaft 411 and the driven shaft 412, extending along the axial direction of the stirring shaft 41. A guide block 4111 is provided on the other of the drive shaft 411 and the driven shaft 412, and the guide block 4111 slides in engagement with the guide groove 4122. The end walls at both ends of the extending direction of the guide groove 4122 can respectively engage with the guide block 4111 to prevent the guide block 4111 from dislodging from the guide groove 4122. The provision of the guide groove 4122 and the guide block 4111 can guide the movement of the driven shaft 412, improving the stability of the movement of the driven shaft 412. Both ends of the guide groove 4122 can be stopped by the guide block 4111, thus ensuring that the guide block 4111 will not come out of the guide groove 4122 when it moves in the guide groove 4122. This avoids the accidental separation of the drive shaft 411 and the driven shaft 412 of the stirring assembly 40 during operation, and improves the safety of equipment operation.

[0045] Specifically, a guide block 4111 is provided on the side wall at the bottom end of the drive shaft 411, and the driven shaft 412 has an axial mounting hole and a guide groove 4122. The guide groove 4122 communicates with the axial mounting hole, and the top end of the axial mounting hole is open. The bottom end of the drive shaft 411 passes through the axial mounting hole. Along the axial direction of the driven shaft 412, both ends of the guide groove 4122 are sealed so that the end walls at both ends of the extension direction of the guide groove 4122 respectively engage with the guide block 4111 for stopping. Furthermore, the engagement of the guide groove 4122 and the guide block 4111 also serves to prevent relative rotation between the drive shaft 411 and the driven shaft 412.

[0046] Understandably, when the drive shaft 411 rotates, under the action of the guide groove 4122 and the guide block 4111, the driven shaft 412 rotates synchronously with the drive shaft 411. The protrusion 4121 provided on the driven shaft 412 moves in the annular inclined groove of the guide cylinder 51, so that the driven shaft 412 generates axial displacement, and then the driven shaft 412 drives the stirring paddle 42 to move in the evaporator 10 along the axial direction of the evaporator 10.

[0047] like Figure 1 , Figure 4 and Figure 5As shown, the potassium fertilizer mother liquor evaporation device further includes: an evaporation tank 60 having a receiving cavity and a steam outlet 601 communicating with the receiving cavity; a fixing component 70 including a limiting plate 71 and a support frame 72 located inside the evaporation tank 60, the limiting plate 71 being connected to the side wall of the evaporation tank 60 to divide the receiving cavity into an evaporation chamber 602 and a heating chamber 603, the evaporation chamber 602 communicating with the steam outlet 601, the support frame 72 being disposed at the bottom end of the limiting plate 71, the limiting plate 71 being provided with a limiting hole 711, the first driving component 30 being located inside the evaporation chamber 602, the support frame 72 and the heating component 20 being located inside the heating chamber 603, the evaporation tank 10 being installed inside the limiting hole 711, the top end of the evaporation tank 10 being located inside the evaporation chamber 602, the bottom end of the evaporation tank 10 being located inside the heating chamber 603 and the support frame 72 being supported at the bottom end of the evaporation tank 10, and the heating component 20 being able to heat the bottom end of the evaporation tank 10.

[0048] Understandably, the evaporator 60 provides a closed environment. The limiting plate 71, through its connection with the side wall of the evaporator 60, divides the accommodating cavity into an upper evaporation chamber 602 and a lower heating chamber 603, forming a clear functional partition. The heating element 20 is located within the heating chamber 603 and focuses on heating the bottom of the evaporator 10. Because the heating chamber 603 and the evaporation chamber 602 are effectively separated by the limiting plate 71, the heating element 20 can operate efficiently in a closed and thermally conductive environment, reducing heat loss and improving evaporation efficiency.

[0049] In this embodiment, the evaporator 10 is a cylindrical structure with an open top and a sealed bottom. A steam outlet 601 is located at the top of the evaporator 10. When the heating element 20 heats the bottom of the evaporator 10, heat is transferred to the inside of the evaporator 10, causing the mother liquor inside to heat up and gradually evaporate. The steam generated by the evaporation of the mother liquor is discharged outside the evaporator 10 through the steam outlet 601.

[0050] Furthermore, the evaporator 60 is also equipped with a ventilation hole 604, which communicates with the heating chamber 603. The heating component 20 includes a flame-spraying assembly, which is located inside the heating chamber 603 and sprays flames towards the bottom of the evaporator 10. The flame-spraying assembly, located inside the heating chamber 603 and spraying flames directly towards the bottom of the evaporator 10, ensures that heat can be directly and quickly transferred to the bottom of the evaporator 10, improving heating efficiency. The ventilation hole 604 prevents excessive smoke and CO2 accumulation during the operation of the flame-spraying assembly, ensuring air circulation within the heating chamber 603 and improving stability during the heating process.

[0051] The flame-spraying component can be a burner or a nozzle, which is existing technology and will not be described in detail here. The flame intensity of the flame-spraying component can be adjusted. By adjusting the size of the flame, the temperature of the mother liquor in the evaporator 10 can be flexibly controlled, thereby regulating the evaporation rate.

[0052] like Figures 5 to 7 As shown, furthermore, one of the limiting plate 71 and the evaporator 10 is provided with a plug-in block 81, which has a plug hole 811. The other of the limiting plate 71 and the evaporator 10 is provided with a plug-in protrusion 82. The plug hole 811 and the plug-in protrusion 82 are plugged into each other to restrict the rotation of the evaporator 10. When the stirring assembly 40 is working, the power it generates may cause the evaporator 10 to shake slightly, especially when the amount of mother liquor in the evaporator 10 is large or the stirring speed is high. The cooperation between the plug-in block 81 and the plug-in protrusion 82 can reduce this shaking and improve the stability of the evaporator 10.

[0053] In this embodiment, the plug-in block 81 is disposed on the side wall of the evaporator 10, the axis of the plug hole 811 is parallel to the axis of the evaporator 10, and the plug-in protrusion 82 is disposed on the top of the limiting plate 71. This arrangement facilitates the plug-in block 81 and the plug-in protrusion 82 to be plugged in and engaged when the evaporator 10 is installed.

[0054] Furthermore, the insertion protrusion 82 is provided with a locking hole 821, and the insertion block 81 is provided with a locking member 90. The locking member 90 includes an abutment 91 and an adjusting member 92. The abutment 91 is radially movably disposed relative to the insertion block 81 along the locking hole 821. The adjusting member 92 is rotatably disposed on the insertion block 81. The adjusting member 92 is threadedly connected to the abutment 91 so that the abutment 91 has a locked position extending into the locking hole 821 and an unlocked position disengaged from the locking hole 821. This arrangement can prevent the insertion protrusion 82 from separating from the insertion block 81, further improving the stability of the evaporator 10.

[0055] In this embodiment, the plug-in block 81 is further provided with a mounting cavity 812 and a radial sliding hole 813. The mounting cavity 812 is located on the outer periphery of the locking hole 821. One end of the radial sliding hole 813 communicates with the plug hole 811, and the other end communicates with the mounting cavity 812. The abutment member 91 passes through the radial sliding hole 813. A guide plate 911 is provided on the side wall of the abutment member 91. A guide rod 8121 is provided in the mounting cavity 812. The extension direction of the guide rod 8121 is the same as the movement direction of the abutment member 91. The guide plate 911 and the guide rod 8121 are slidably engaged. The extension direction of the adjusting member 92 is the same as the movement direction of the abutment member 91. The adjusting member 92 passes through the plug-in block 81. One end of the adjusting member 92 is located in the mounting cavity 812 and is threadedly connected to the end of the abutment member 91 away from the plug hole 811. When the adjusting member 92 is rotated, due to the threaded engagement between the adjusting member 92 and the abutment member 91, the rotation of the adjusting member 92 is converted into a linear movement of the abutment member 91 along the axis of the radial sliding hole 813, thereby realizing the process of the end of the abutment member 91 away from the adjusting member 92 extending into or disengaging from the locking hole 821.

[0056] like Figure 1 , Figure 4 and Figure 5 As shown in the embodiment of this solution, the evaporator 60 includes a body 61 and a door 62. The body 61 has a side opening, and the door 62 is hinged to the body 61. The side opening design of the body 61 and the hinged door 62 facilitate inspection and maintenance of the internal components of the body 61 by the operator. When the door 62 is closed, it forms a relatively enclosed heating and evaporation environment with the body 61, ensuring heating efficiency and ensuring that steam is directionally discharged from the steam exhaust port 601.

[0057] Furthermore, the first driving component 30 is vertically and flexibly mounted on the housing 61, so that the stirring paddle 42 of the stirring assembly 40 has a working position extending into the evaporator 10 and an idle position extending out of the evaporator 10. When it is necessary to remove the evaporator 10 for maintenance or replacement, by adjusting the first driving component 30 to the highest position, the stirring paddle 42 is raised to the outside of the evaporator 10, and the evaporator 10 can be removed, which greatly facilitates the operation.

[0058] Specifically, the potash fertilizer mother liquor evaporation device also includes: a second drive unit 100, which is mounted on the housing 61. A screw 101 is mounted on the output shaft of the second drive unit 100. The screw 101 is threadedly connected to the mounting frame 50 to drive the mounting frame 50 to lift and lower. The combined design of the second drive unit 100 and the screw 101 provides automated lifting control for the evaporator 10, making operation more convenient.

[0059] In this embodiment, two fixing blocks 611 are provided on the inner sidewall of the housing 61. The two fixing blocks 611 are arranged opposite each other, and each of the two fixing blocks 611 has a mounting groove on its opposite side, which extends along the height direction. The two ends of the mounting bracket 50 are respectively embedded in the two mounting grooves and slide in cooperation with the corresponding mounting grooves. A second driving member 100 is provided at the top of each mounting groove, and the screws 101 on the two second driving members 100 are respectively threaded to the two ends of the mounting bracket 50. This arrangement can improve the stability of the movement of the mounting bracket 50.

[0060] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0061] 1. Through the linkage design of the driving shaft 411 and driven shaft 412 of the stirring shaft 41, the stirring paddle 42 can stir the mother liquor at different height positions in the evaporator 10, which improves the overall fluidity of the mother liquor, improves the heat transfer efficiency, and increases the evaporation rate.

[0062] 2. The evaporator 60 is divided into an evaporation chamber 602 and a heating chamber 603 by a limiting plate 71, forming a closed heating and evaporation environment. The heating element 20 heats the bottom of the evaporator 10 in the heating chamber 603, reducing heat loss and improving evaporation efficiency. At the same time, the design of the steam exhaust port 601 ensures that the steam generated by evaporation can be discharged in a directional manner, optimizing the production environment;

[0063] 3. The cooperation between the plug block 81 and the plug protrusion 82, combined with the use of the locking component 90, reduces the shaking of the evaporator 10 caused by the power generated when the stirring component 40 is working, and improves the stability of the evaporator 10.

[0064] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A potassium fertilizer mother liquor evaporation device, characterized in that, include: Evaporator (10); Heating component (20) is used to heat the potassium fertilizer mother liquor in the evaporator (10); A first driving member (30) is disposed on the top of the evaporator (10); A stirring assembly (40) includes a stirring shaft (41) and a stirring paddle (42). The stirring shaft (41) includes a coaxial drive shaft (411) and a driven shaft (412). The driven shaft (412) is movably arranged along an axis relative to the drive shaft (411). The stirring paddle (42) is disposed on the driven shaft (412). The driven shaft (412) and the stirring paddle (42) pass through the evaporator (10). The output end of the first drive member (30) is drivenly connected to the drive shaft (411) to make the drive shaft (411) rotate. The drive shaft (411) and the driven shaft (412) are linked to make the driven shaft (412) rotate synchronously with the drive shaft (411), and the driven shaft (412) is movable relative to the drive shaft (411).

2. The potassium fertilizer mother liquor evaporation device according to claim 1, characterized in that, The potassium fertilizer mother liquor evaporation device also includes: A mounting bracket (50) is mounted on the outer periphery of the evaporator (10), and the first drive member (30) is mounted on the mounting bracket (50); A guide cylinder (51) is disposed on the mounting bracket (50). The guide cylinder (51) is sleeved on the outer periphery of the driven shaft (412). An inclined structure (511) is provided on one of the inner sidewall of the guide cylinder (51) and the outer sidewall of the driven shaft (412). A protrusion (4121) is provided on the other sidewall of the guide cylinder (51) and the outer sidewall of the driven shaft (412). The protrusion (4121) abuts against the inclined structure (511) so that when the driven shaft (412) rotates, the driven shaft (412) moves relative to the driving shaft (411).

3. The potassium fertilizer mother liquor evaporation device according to claim 2, characterized in that, An annular groove is provided on the inner side wall of the guide cylinder (51), forming the inclined structure (511). A protrusion (4121) is provided on the outer side wall of the driven shaft (412), which is movably inserted into the annular groove and presses against the groove wall of the annular groove.

4. The potassium fertilizer mother liquor evaporation device according to claim 1, characterized in that, One of the drive shaft (411) and the driven shaft (412) is provided with a guide groove (4122), which extends along the axial direction of the stirring shaft (41). The other of the drive shaft (411) and the driven shaft (412) is provided with a guide block (4111), which slides in cooperation with the guide groove (4122). The end walls at both ends of the extending direction of the guide groove (4122) can respectively stop and cooperate with the guide block (4111) to prevent the guide block (4111) from coming out of the guide groove (4122).

5. The potassium fertilizer mother liquor evaporation apparatus according to any one of claims 1 to 4, characterized in that, The potassium fertilizer mother liquor evaporation device also includes: An evaporator (60) has a receiving cavity and a steam outlet (601) communicating with the receiving cavity; The fixing component (70) includes a limiting plate (71) and a support frame (72) located inside the evaporator (60). The limiting plate (71) is connected to the side wall of the evaporator (60) to divide the receiving cavity into an evaporation chamber (602) and a heating chamber (603). The evaporation chamber (602) communicates with the steam outlet (601). The support frame (72) is located at the bottom end of the limiting plate (71). The limiting plate (71) is provided with a limiting hole (711). The first driving member (30) is positioned... Inside the evaporation chamber (602), the support frame (72) and the heating element (20) are located inside the heating chamber (603). The evaporator (10) is installed inside the limiting hole (711). The top of the evaporator (10) is located inside the evaporation chamber (602), and the bottom of the evaporator (10) is located inside the heating chamber (603). The support frame (72) supports the bottom of the evaporator (10). The heating element (20) can heat the bottom of the evaporator (10).

6. The potassium fertilizer mother liquor evaporation device according to claim 5, characterized in that, The evaporator (60) is also provided with a ventilation hole (604), which is connected to the heating chamber (603). The heating component (20) includes a flame-spraying assembly, which is disposed in the heating chamber (603) and sprays flame toward the bottom of the evaporator (10).

7. The potassium fertilizer mother liquor evaporation device according to claim 5, characterized in that, One of the limiting plate (71) and the evaporator (10) is provided with a plug-in block (81), and the plug-in block (81) is provided with a plug hole (811). The other of the limiting plate (71) and the evaporator (10) is provided with a plug-in protrusion (82). The plug hole (811) and the plug-in protrusion (82) are plugged into each other to restrict the rotation of the evaporator (10).

8. The potassium fertilizer mother liquor evaporation apparatus according to claim 7, characterized in that The insertion protrusion (82) is provided with a locking hole (821), and the insertion block (81) is provided with a locking member (90). The locking member (90) includes an abutment (91) and an adjusting member (92). The abutment (91) is movably disposed relative to the insertion block (81) along the radial direction of the locking hole (821). The adjusting member (92) is rotatably disposed on the insertion block (81). The adjusting member (92) is threadedly connected to the abutment (91) so that the abutment (91) has a locking position that extends into the locking hole (821) and an unlocking position that disengages from the locking hole (821).

9. The potash liquor evaporation apparatus of claim 5, wherein, The evaporator (60) includes a box body (61) and a box door (62). The box body (61) has a side opening, and the box door (62) is hinged to the box body (61). The first drive member (30) and the stirring assembly (40) are located inside the box body (61). The first drive member (30) is vertically mounted on the box body (61) so that the stirring paddle (42) of the stirring assembly (40) has a working position that extends into the evaporator (10) and an idle position that extends out of the evaporator (10).

10. The potassium fertilizer mother liquor evaporation device according to claim 9, characterized in that, The potassium fertilizer mother liquor evaporation device also includes: The mounting bracket (50) is located inside the housing (61). The mounting bracket (50) is vertically and flexibly mounted on the housing (61). The first driving member (30) is mounted on the mounting bracket (50). A second drive unit (100) is disposed on the housing (61). A screw (101) is disposed on the output shaft of the second drive unit (100). The screw (101) is threadedly connected to the mounting bracket (50) to drive the mounting bracket (50) to rise and fall.

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