Wastewater circulating treatment system in potassium nitrate production process

Abstract

The invention discloses a wastewater circulation treatment system in a potassium nitrate production process, which comprises a sedimentation tank, two sides of the sedimentation tank are respectively provided with a liquid inlet pipe and a liquid outlet pipe, the top end of the sedimentation tank is provided with a support, and the support is provided with a horizontal driving mechanism; the output end of the horizontal driving mechanism is connected with a precipitant adding pipe which is horizontally arranged, a plurality of spray heads are mounted at the bottom end of the precipitant adding pipe, and the spray heads are distributed at the bottom end of the precipitant adding pipe at equal intervals. A plurality of spray heads are distributed at the bottom end of the precipitant adding pipe at equal intervals, precipitants are sprayed into the settling pond, the adding uniformity of the precipitants is improved, the horizontal driving mechanism drives the precipitant adding pipe to horizontally move, and the precipitants are further ensured to be more uniformly distributed in the settling pond.

Description

Technical Field

[0001] The invention relates to the technical field of potassium nitrate production, in particular to a wastewater circulation treatment system in a potassium nitrate production process. Background Art

[0002] In modern industrial production, potassium nitrate is an important chemical raw material and is widely used in many fields. With the continuous expansion of potassium nitrate production, the problem of wastewater treatment generated in its production process has become increasingly prominent.

[0003] At present, in the process of potassium nitrate production, wastewater usually contains a large amount of potassium nitrate ions and other impurities. If these wastewaters are not effectively treated and directly discharged, not only will they cause serious pollution to the environment, but they will also waste a large amount of water resources. Existing wastewater treatment devices have some shortcomings when treating potassium nitrate production wastewater.

[0004] On the one hand, the precipitant in some treatment devices is unevenly distributed, resulting in the inability of potassium nitrate ions in the wastewater to fully react with the precipitant, affecting the precipitation effect, thereby reducing the efficiency and quality of wastewater treatment. On the other hand, the solid-liquid separation process is relatively cumbersome, making it difficult to achieve fast and efficient separation operations. At the same time, the filter is prone to clogging during use and lacks an effective cleaning mechanism, which affects the filtration effect and the continuous operation of the equipment.

[0005] In order to solve the above problems, the present invention provides a wastewater recycling treatment system in a potassium nitrate production process, aiming to overcome the deficiencies of the prior art, improve the effect and efficiency of wastewater treatment, realize the recycling of water resources, and reduce pollution to the environment. Summary of the invention

[0006] In order to solve the problems mentioned in the above background technology, the present invention provides a wastewater circulation treatment system in a potassium nitrate production process.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A wastewater circulation treatment system in a potassium nitrate production process comprises a sedimentation tank, a liquid inlet pipe and a liquid outlet pipe are respectively arranged on both sides of the sedimentation tank, a bracket is arranged at the top of the sedimentation tank, and a horizontal driving mechanism is installed on the bracket; The output end of the horizontal driving mechanism is connected to a horizontally arranged precipitant adding pipe, and a plurality of nozzles are installed at the bottom end of the precipitant adding pipe, and the nozzles are evenly distributed at the bottom end of the precipitant adding pipe; There are multiple horizontal shafts installed for rotation inside the sedimentation tank. Baffles are fixed on both sides of the horizontal shafts. Filter screens are installed on the baffles. When the horizontal shafts rotate until the baffles are in a horizontal position, the multiple baffles are spliced ​​together as a whole. The horizontal height of the liquid outlet pipe is smaller than the horizontal height of the horizontal axis.

[0008] Preferably, one end of the precipitant addition pipe is connected to a liquid introduction pipe, a precipitant storage tank is placed on one side of the sedimentation tank, and a submersible pump is installed at one end of the liquid introduction pipe away from the precipitant addition pipe.

[0009] Preferably, a guide bracket is fixed on the submersible pump, a horizontally arranged guide rail is fixed on the inner wall of the precipitant storage tank, and the guide bracket is slidably mounted on the guide rail.

[0010] Preferably, the horizontal driving mechanism includes a threaded rod rotatably mounted on a bracket, the threaded rod is driven by a first rotating motor, guide rods are fixed on both sides of the threaded rod on the bracket, a threaded sleeve is mounted on the outside of the threaded rod, guide sleeves are fixed on both sides of the threaded sleeve, the two guide sleeves are respectively mounted on the outside of the two guide rods, and the bottom end of the threaded sleeve is fixed to the precipitant addition tube.

[0011] Preferably, a rotating shaft is installed inside the precipitant addition tube, and a plurality of sealing plates are fixed outside the rotating shaft. The sealing plates correspond to the positions of the nozzles one by one, and the sealing plates are staggered up and down outside the rotating shaft.

[0012] Preferably, one end of the rotating shaft extends to the outside of the precipitant addition tube and is fixed with a first spur gear, and a first rack arranged horizontally is fixed on the bracket, and the first spur gear is meshed with the first rack.

[0013] Preferably, a mounting bar is fixed to one side of the precipitant addition tube, a plurality of agitators are rotatably mounted on the mounting bar, a stirring branch is provided at the bottom end of the agitator, a first bevel gear is fixed to the top of the agitator, a transmission shaft is rotatably mounted on the top of the mounting bar, a plurality of second bevel gears are fixed to the outside of the transmission shaft, the first bevel gear is meshed with the second bevel gear in a one-to-one correspondence, a second spur gear is fixed to one end of the transmission shaft, a horizontally arranged second rack is fixed to the inner wall of the sedimentation tank, and the second spur gear is meshed with the second rack.

[0014] Preferably, both ends of the horizontal axis extend to the outside of the sedimentation tank, and a third spur gear is fixed to the outside of one end of the horizontal axis, and multiple third spur gears are meshed with each other in sequence. A second rotating motor is fixed on the outer wall of the sedimentation tank, and a fourth spur gear is fixed to the output shaft of the second rotating motor, and the fourth spur gear is meshed with one of the third spur gears.

[0015] Preferably, the first hydraulic pipeline and the second hydraulic pipeline are respectively fixed on both sides of the sedimentation tank, the interior of the horizontal axis is hollow, and the two ends of the horizontal axis are respectively connected to the first hydraulic pipeline and the second hydraulic pipeline through a rotating joint, a hydraulic piston is installed inside the horizontal axis, a magnet A is installed outside the hydraulic piston, a magnet B is movably installed outside the horizontal axis, a cleaning scraper is fixed on the magnet B, and magnet A and magnet B attract each other.

[0016] Preferably, the magnet B has an arc-shaped structure, and the curvature of the magnet B matches the surface of the horizontal axis. A limiting rod is fixed on the horizontal axis, the limiting rod is clamped on the side of the magnet B away from the horizontal axis, and a groove is opened on the side of the magnet B away from the horizontal axis, and the limiting rod is located in the groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: Multiple nozzles are evenly distributed at the bottom of the precipitant addition pipe to spray the precipitant into the sedimentation tank, which improves the uniformity of precipitant delivery. The horizontal driving mechanism drives the precipitant addition pipe to move horizontally, further ensuring that the precipitant is more evenly distributed in the sedimentation tank.

[0018] Baffles and filters are provided on both sides of the horizontal axis in the sedimentation tank. After the precipitant is added, the horizontal axis can be rotated to the vertical state of the baffle to allow the sediment to fall to the bottom of the tank. When the supernatant needs to be released, the horizontal axis is rotated to the horizontal state of the baffle, and the sediment is blocked by the filter, making it convenient to open the liquid outlet pipe to discharge the supernatant, thereby achieving solid-liquid separation. The treated water can be recycled to save water resources.

[0019] The rotating shaft inside the precipitant adding tube and the sealing plates distributed staggered outside, when the precipitant adding tube moves horizontally, the first spur gear meshes with the first rack to drive the rotating shaft to rotate, and the sealing plates intermittently block the nozzles so that adjacent nozzles are not opened at the same time, thereby increasing the pressure of the precipitant when it is sprayed out, enhancing the pre-mixing effect, and also improving the uniformity of spraying the precipitant.

[0020] Hydraulic oil is transported to the inside of the horizontal axis through the first hydraulic pipeline and the second hydraulic pipeline to push the hydraulic piston to move. The mutual attraction between magnet A and magnet B is used to drive the cleaning scraper on magnet B to move axially along the horizontal axis to actively clean the filter screen to ensure the filtering effect of the filter screen.

[0021] When the precipitant addition tube moves horizontally, the second spur gear moves along the second rack, thereby driving the transmission shaft to rotate. The meshing of the second bevel gear and the first bevel gear can drive the agitator to stir the wastewater, thereby improving the dispersion of the precipitant. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a first perspective stereogram of the present invention; Figure 2 It is a second viewing angle stereogram of the present invention; Figure 3 It is a front view of the present invention; Figure 4 The baffles of the present invention are rotated to a horizontal state and combined to form an overall state; Figure 5 This is a schematic diagram of the baffles of the present invention rotating to a vertical state and being separated from each other; Figure 6 It is a schematic diagram of the connection relationship between the first hydraulic pipeline and the second hydraulic pipeline and the horizontal axis of the present invention; Figure 7 It is a schematic diagram of the connection relationship between the magnet B and the horizontal axis of the present invention; Figure 8 This is an enlarged detail view of the precipitant addition tube of the present invention from the first perspective; Fig. 9 This is a second perspective enlarged detail view of the precipitant addition tube of the present invention; Fig.10 This is a schematic diagram of the internal structure of the precipitant adding tube of the present invention; Fig.11 It is a schematic diagram of the position structure of the liquid guide tube of the present invention; Fig.12 for Fig.11 A zoomed-in detail of position A in the middle; In the figure: 1 sedimentation tank, 101 liquid inlet pipe, 102 liquid outlet pipe, 2 bracket, 201 threaded rod, 202 guide rod, 203 first rotating motor, 204 threaded sleeve, 205 guide sleeve, 3 sedimentation agent adding pipe, 301 nozzle, 302 liquid guide pipe, 303 submersible pump, 304 sedimentation agent storage tank, 305 guide rail, 306 guide bracket, 307 rotating shaft, 308 blocking plate, 309 second spur gear, 310 second rack, 4 mounting bar, 401 agitator, 402 agitating branch, 403 first bevel gear, 404 transmission shaft, 405 second bevel gear, 406 first spur gear, 407 first rack, 5 horizontal axis, 501 baffle, 502 filter, 503 third spur gear, 504 second rotating motor, 505 fourth spur gear, 6 first hydraulic pipeline, 601 second hydraulic pipeline, 602 rotary joint, 7 magnet B, 701 cleaning scraper, 702 limit rod, 703 groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0025] Reference Figure 1-12 A wastewater recycling treatment system in a potassium nitrate production process comprises a sedimentation tank 1, a liquid inlet pipe 101 and a liquid outlet pipe 102 are respectively arranged on both sides of the sedimentation tank 1, a bracket 2 is arranged on the top of the sedimentation tank 1, and a horizontal driving mechanism is installed on the bracket 2; The output end of the horizontal driving mechanism is connected to a horizontally arranged precipitant adding pipe 3, and a plurality of nozzles 301 are installed at the bottom end of the precipitant adding pipe 3, and the nozzles 301 are evenly distributed at the bottom end of the precipitant adding pipe 3; The nozzle 301 is used to spray the precipitant into the sedimentation tank 1. Multiple nozzles 301 can improve the uniformity of the precipitant addition. The horizontal driving mechanism can drive the precipitant addition pipe 3 to move horizontally as a whole, further improving the uniformity of the precipitant addition.

[0026] A plurality of transverse shafts 5 are rotatably installed inside the sedimentation tank 1, baffles 501 are fixed on both sides of the transverse shaft 5, and filter screens 502 are installed on the baffles 501. When the transverse shaft 5 is rotated until the baffles 501 are in a horizontal position, the plurality of baffles 501 are spliced ​​together into a whole. After the precipitant is added, the potassium nitrate ions in the wastewater react with the precipitant to form an insoluble precipitate, which is then allowed to settle. At this time, the horizontal axis 5 rotates until the baffle 501 is in a vertical state (such as Figure 5 As shown in the figure, the sediment can fall to the bottom of the sedimentation tank 1 through the gap between the baffles 501. When the supernatant needs to be discharged, the horizontal axis 5 is rotated until the baffle 501 is in a horizontal position, and the sediment will be blocked by the filter screen 502. The horizontal height of the liquid outlet pipe 102 is less than the horizontal height of the horizontal axis 5. At this time, the valve of the liquid outlet pipe 102 is opened to discharge the supernatant, so that the treated water can be recycled, which saves water resources and makes it more convenient to separate solids and liquids. Example 2

[0027] Referring to 1-12, the difference between this embodiment and embodiment 1 is that one end of the precipitant addition pipe 3 is connected to a liquid introduction pipe 302, a precipitant storage tank 304 is placed on one side of the sedimentation tank 1, and a submersible pump 303 is installed at one end of the liquid introduction pipe 302 away from the precipitant addition pipe 3; The precipitant is placed in the precipitant storage tank 304, pumped out by the submersible pump 303, and sprayed into the wastewater through the nozzle 301, so as to achieve the purpose of premixing.

[0028] A guide bracket 306 is fixed on the submersible pump 303, a horizontally arranged guide rail 305 is fixed on the inner wall of the precipitant storage tank 304, and the guide bracket 306 is slidably mounted on the guide rail 305; It can ensure the stable movement of the submersible pump 303 and facilitate maintenance. Example 3

[0029] Referring to 1-12, the difference between this embodiment and embodiment 1 is that the horizontal driving mechanism includes a threaded rod 201 rotatably mounted on a bracket 2, the threaded rod 201 is driven by a first rotating motor 203, guide rods 202 are fixed on both sides of the threaded rod 201 on the bracket 2, a threaded sleeve 204 is mounted on the outside of the threaded rod 201, guide sleeves 205 are fixed on both sides of the threaded sleeve 204, the two guide sleeves 205 are respectively mounted on the outside of the two guide rods 202, and the bottom end of the threaded sleeve 204 is fixed to the precipitant addition tube 3; When the first rotating motor 203 is turned on to drive the threaded rod 201 to rotate, the threaded sleeve 204 can be driven to move horizontally, thereby achieving the purpose of driving the precipitant addition tube 3 to move horizontally. Example 4

[0030] Referring to 1-12, the difference between this embodiment and embodiment 3 is that a rotating shaft 307 is installed inside the precipitant addition tube 3, and a plurality of blocking plates 308 are fixed to the outside of the rotating shaft 307. The blocking plates 308 correspond to the positions of the nozzles 301 one by one, and the blocking plates 308 are staggered up and down on the outside of the rotating shaft 307. One end of the rotating shaft 307 extends to the outside of the precipitant addition tube 3 and is fixed with a first spur gear 406. A horizontally arranged first rack 407 is fixed on the bracket 2, and the first spur gear 406 is meshed with the first rack 407. When the precipitant addition tube 3 moves horizontally, the first spur gear 406 moves along the first rack 407, thereby driving the rotating shaft 307 to rotate relative to the precipitant addition tube 3. During the rotation, the blocking plate 308 will intermittently block the nozzle 301, so that adjacent nozzles 301 are not opened at the same time. Fewer nozzles 301 can increase the pressure when the precipitant is sprayed out, improve the premixing effect, and also improve the uniformity of spraying the precipitant. Example 5

[0031] Referring to 1-12, the difference between this embodiment and embodiment 3 is that a mounting bar 4 is fixed to one side of the precipitant addition tube 3, a plurality of agitators 401 are rotatably mounted on the mounting bar 4, a stirring branch 402 is provided at the bottom end of the agitator 401, a first bevel gear 403 is fixed to the top of the agitator 401, a transmission shaft 404 is rotatably mounted on the top of the mounting bar 4, a plurality of second bevel gears 405 are fixed to the outside of the transmission shaft 404, the first bevel gear 403 is meshed with the second bevel gear 405 in a one-to-one correspondence, a second spur gear 309 is fixed to one end of the transmission shaft 404, a second rack 310 arranged horizontally is fixed to the inner wall of the sedimentation tank 1, and the second spur gear 309 is meshed with the second rack 310; When the precipitant addition pipe 3 moves horizontally, the second spur gear 309 moves along the second rack 310, thereby driving the transmission shaft 404 to rotate, and the second bevel gear 405 meshes with the first bevel gear 403 to drive the agitator 401 to agitate the wastewater, thereby improving the dispersion of the precipitant; Both ends of the horizontal axis 5 extend to the outside of the sedimentation tank 1, and a third spur gear 503 is fixed to the outside of one end of the horizontal axis 5, and multiple third spur gears 503 are meshed with each other in sequence. A second rotating motor 504 is fixed to the outer wall of the sedimentation tank 1, and a fourth spur gear 505 is fixed to the output shaft of the second rotating motor 504, and the fourth spur gear 505 is meshed with one of the third spur gears 503; In order to drive the synchronous rotation of each horizontal axis 5 to switch the filtering and non-filtering states, when the second rotating motor 504 is turned on, the engagement of the fourth spur gear 505 with one of the third spur gears 503 can drive one of the horizontal axes 5 to rotate, and then the engagement of multiple third spur gears 503 in sequence can drive the remaining horizontal axes 5 to rotate synchronously, and the directions of rotation of adjacent horizontal axes 5 are opposite. Example 6

[0032] Referring to 1-12, the difference between this embodiment and embodiment 5 is that the first hydraulic pipeline 6 and the second hydraulic pipeline 601 are fixed on both sides of the sedimentation tank 1, the interior of the horizontal axis 5 is hollow, and the two ends of the horizontal axis 5 are connected to the first hydraulic pipeline 6 and the second hydraulic pipeline 601 through a rotary joint 602, respectively, a hydraulic piston is installed inside the horizontal axis 5, a magnet A is installed outside the hydraulic piston, a magnet B7 is movably installed outside the horizontal axis 5, a cleaning scraper 701 is fixed on the magnet B7, and the magnet A and the magnet B7 attract each other; Hydraulic oil can be transported from both ends to the inside of the horizontal axis 5 through the first hydraulic pipeline 6 and the second hydraulic pipeline 601 respectively. The oil pressure can push the hydraulic piston to move horizontally inside the horizontal axis 5, and then the mutual attraction between magnet A and magnet B7 can drive magnet B7 to move horizontally along the axial direction of the horizontal axis 5, thereby driving the cleaning scraper 701 to move along the axial direction of the horizontal axis 5 to actively clean the filter 502.

[0033] The magnet B7 has an arc-shaped structure, and the curvature of the magnet B7 matches the surface of the horizontal axis 5. A limiting rod 702 is fixed on the horizontal axis 5. The limiting rod 702 is clamped on the side of the magnet B7 away from the horizontal axis 5. A groove 703 is provided on the side of the magnet B7 away from the horizontal axis 5, and the limiting rod 702 is located in the groove 703. This ensures that the magnet B can move stably on the horizontal axis 5 and prevent it from falling off.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wastewater recycling treatment system in the potassium nitrate production process, Features: It comprises a sedimentation tank (1), wherein a liquid inlet pipe (101) and a liquid outlet pipe (102) are respectively provided on both sides of the sedimentation tank (1), a bracket (2) is provided at the top of the sedimentation tank (1), and a horizontal driving mechanism is installed on the bracket (2); The output end of the horizontal driving mechanism is connected to a horizontally arranged precipitant addition pipe (3), and a plurality of nozzles (301) are installed at the bottom end of the precipitant addition pipe (3), and the nozzles (301) are evenly distributed at the bottom end of the precipitant addition pipe (3); A plurality of transverse shafts (5) are rotatably mounted inside the sedimentation tank (1), baffles (501) are fixed on both sides of the transverse shafts (5), and filter screens (502) are mounted on the baffles (501). When the transverse shafts (5) are rotated until the baffles (501) are in a horizontal position, the plurality of baffles (501) are spliced ​​together to form a whole. The horizontal height of the liquid outlet pipe (102) is less than the horizontal height of the horizontal axis (5).

2. A wastewater recycling system in a potassium nitrate production process according to claim 1, Features: One end of the precipitant addition pipe (3) is connected to a liquid introduction pipe (302), a precipitant storage tank (304) is placed on one side of the sedimentation tank (1), and a submersible pump (303) is installed at one end of the liquid introduction pipe (302) away from the precipitant addition pipe (3).

3. A wastewater recycling system in a potassium nitrate production process according to claim 2, Features: A guide bracket (306) is fixed on the submersible pump (303), a horizontally arranged guide rail (305) is fixed on the inner wall of the precipitant storage tank (304), and the guide bracket (306) is slidably mounted on the guide rail (305).

4. A wastewater recycling treatment system in a potassium nitrate production process according to claim 1, Features: The horizontal driving mechanism comprises a threaded rod (201) rotatably mounted on a bracket (2), the threaded rod (201) being driven by a first rotating motor (203), guide rods (202) being fixed on both sides of the threaded rod (201) on the bracket (2), a threaded sleeve (204) being mounted on the outside of the threaded rod (201), guide sleeves (205) being fixed on both sides of the threaded sleeve (204), the two guide sleeves (205) being mounted on the outside of the two guide rods (202), and the bottom ends of the threaded sleeves (204) being fixed to the precipitant addition tube (3).

5. A wastewater recycling treatment system in a potassium nitrate production process according to claim 4, Features: A rotating shaft (307) is installed inside the precipitant addition tube (3), and a plurality of blocking plates (308) are fixed outside the rotating shaft (307). The blocking plates (308) correspond to the positions of the nozzles (301) one by one, and the blocking plates (308) are staggeredly distributed up and down outside the rotating shaft (307).

6. A wastewater recycling treatment system in a potassium nitrate production process according to claim 5, Features: One end of the rotating shaft (307) extends to the outside of the precipitant addition tube (3) and is fixed with a first spur gear (406). A first rack (407) arranged horizontally is fixed on the bracket (2), and the first spur gear (406) is meshed with the first rack (407).

7. A wastewater recycling treatment system in a potassium nitrate production process according to claim 4, Features: A mounting bar (4) is fixed on one side of the precipitant addition tube (3), a plurality of stirrers (401) are rotatably mounted on the mounting bar (4), a stirring branch (402) is provided at the bottom end of the stirrer (401), a first bevel gear (403) is fixed on the top end of the stirrer (401), a transmission shaft (404) is rotatably mounted on the top end of the mounting bar (4), a plurality of second bevel gears (405) are fixed on the outside of the transmission shaft (404), the first bevel gears (403) are meshed with the second bevel gears (405) in a one-to-one correspondence, a second spur gear (309) is fixed on one end of the transmission shaft (404), a second rack (310) arranged horizontally is fixed on the inner wall of the sedimentation tank (1), and the second spur gear (309) is meshed with the second rack (310).

8. A wastewater recycling treatment system in a potassium nitrate production process according to claim 1, Features: Both ends of the horizontal axis (5) extend to the outside of the sedimentation tank (1), and a third spur gear (503) is fixed to the outside of one end of the horizontal axis (5), and the plurality of third spur gears (503) are meshed with each other in sequence. A second rotating motor (504) is fixed to the outer wall of the sedimentation tank (1), and a fourth spur gear (505) is fixed to the output shaft of the second rotating motor (504), and the fourth spur gear (505) is meshed with one of the third spur gears (503).

9. A wastewater recycling treatment system in a potassium nitrate production process according to claim 8, Features: A first hydraulic pipeline (6) and a second hydraulic pipeline (601) are fixed to both sides of the sedimentation tank (1), the interior of the transverse axis (5) is hollow, and the two ends of the transverse axis (5) are connected to the first hydraulic pipeline (6) and the second hydraulic pipeline (601) via a rotary joint (602), a hydraulic piston is installed inside the transverse axis (5), a magnet A is installed outside the hydraulic piston, a magnet B (7) is movably installed outside the transverse axis (5), a cleaning scraper (701) is fixed on the magnet B (7), and the magnet A and the magnet B (7) attract each other.

10. A wastewater recycling treatment system in a potassium nitrate production process according to claim 9, Features: The magnet B (7) has an arc-shaped structure, and the curvature of the magnet B (7) matches the surface of the transverse axis (5). A limiting rod (702) is fixed on the transverse axis (5), and the limiting rod (702) is clamped on a side of the magnet B (7) away from the transverse axis (5). A groove (703) is provided on the side of the magnet B (7) away from the transverse axis (5), and the limiting rod (702) is located in the groove (703).

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