A wastewater recycling treatment system in a potassium nitrate production process

Abstract

The application discloses a kind of wastewater recycling treatment systems in potassium nitrate production process, including sedimentation tank, the two sides of the sedimentation tank are respectively equipped with liquid inlet pipe and liquid outlet pipe, the top of sedimentation tank is equipped with support, and horizontal drive mechanism is installed on support;The output end of the horizontal drive mechanism is connected with the horizontal sedimentation agent adding pipe, and a plurality of spray heads are installed at the bottom end of the sedimentation agent adding pipe, and the spray heads are equally distributed at the bottom end of the sedimentation agent adding pipe.In the present application, multiple spray heads are equally distributed at the bottom end of the sedimentation agent adding pipe, and the sedimentation agent is sprayed into the sedimentation tank, which improves the uniformity of the sedimentation agent addition.The horizontal drive mechanism drives the horizontal movement of the sedimentation agent adding pipe, which further ensures the uniform distribution of the sedimentation agent in the sedimentation tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of potassium nitrate production, in particular to a wastewater recycling treatment system in the production process of potassium nitrate. BACKGROUND

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

[0003] At present, in the production process of potassium nitrate, the wastewater usually contains a large amount of potassium nitrate ions and other impurities. If these wastewater is not effectively treated and directly discharged, it will not only cause serious pollution to the environment, but also waste a lot of water resources. The existing wastewater treatment device has some deficiencies in treating potassium nitrate production wastewater.

[0004] On the one hand, the deposition agent of part of the treatment device is not uniformly put, which causes the potassium nitrate ions in the wastewater to not fully react with the deposition agent, affects the precipitation effect, and thus reduces the efficiency and quality of wastewater treatment. On the other hand, the solid-liquid separation process is relatively complicated, and it is difficult to realize rapid and efficient separation operation. At the same time, the filter screen is easy to block during use, and lacks an effective cleaning mechanism, which affects the filtration effect and continuous operation of the equipment.

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

[0006] In order to solve the problems mentioned in the background art, the present application provides a wastewater recycling treatment system in the production process of potassium nitrate.

[0007] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0008] A wastewater recycling treatment system in the production process of potassium nitrate, comprising a sedimentation tank, the 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 a horizontal drive mechanism is installed on the support;

[0009] The output end of the horizontal drive mechanism is connected with a horizontally arranged deposition agent adding pipe, a plurality of nozzles are installed at the bottom end of the deposition agent adding pipe, and the nozzles are equidistantly distributed at the bottom end of the deposition agent adding pipe;

[0010] A plurality of horizontal shafts are rotatably installed in the inside of the sedimentation tank, baffles are fixed on both sides of the horizontal shafts, and filter screens are installed on the baffles; when the horizontal shafts are rotated to the horizontal position of the baffles, the plurality of baffles are spliced into a whole.

[0011] The horizontal height of the liquid outlet pipe is less than the horizontal height of the horizontal shaft.

[0012] Preferably, one end of the precipitant adding pipe is connected with a liquid guiding pipe, a precipitant storage tank is arranged on one side of the precipitation tank, and a submersible pump is arranged on the end of the liquid guiding pipe away from the precipitant adding pipe.

[0013] Preferably, a guide bracket is fixed on the submersible pump, horizontal guide rails are fixed on the inner wall of the precipitant storage tank, and the guide bracket is slidingly arranged on the guide rails.

[0014] Preferably, the horizontal driving mechanism comprises a threaded rod rotatingly arranged on a bracket, the threaded rod is driven by a first rotating motor, guide rods are further fixed on both sides of the bracket, a threaded sleeve is arranged on the outer side of the threaded rod, guide sleeves are fixed on both sides of the threaded sleeve, the two guide sleeves are further arranged on the outer sides of the two guide rods, and the bottom end of the threaded sleeve is fixed with the precipitant adding pipe.

[0015] Preferably, a rotating shaft is arranged in the precipitant adding pipe, a plurality of blocking plates are fixed on the outer side of the rotating shaft, the blocking plates correspond to the positions of the nozzles one by one, and the blocking plates are staggered on the outer side of the rotating shaft.

[0016] Preferably, one end of the rotating shaft extends to the outside of the precipitant adding pipe and is fixed with a first spur gear, a first gear rack is horizontally arranged on the bracket, and the first spur gear is engaged with the first gear rack.

[0017] Preferably, a mounting strip is fixed on one side of the precipitant adding pipe, a plurality of stirrers are rotatingly arranged on the mounting strip, stirring branches are arranged at the bottom ends of the stirrers, first bevel gears are fixed on the top ends of the stirrers, a transmission shaft is rotatingly arranged on the top end of the mounting strip, a plurality of second bevel gears are fixed on the outer side of the transmission shaft, the first bevel gears are engaged with the second bevel gears one by one, a second spur gear is fixed on one end of the transmission shaft, a second gear rack is horizontally arranged on the inner wall of the precipitation tank, and the second spur gear is engaged with the second gear rack.

[0018] Preferably, both ends of the horizontal shaft extend to the outside of the precipitation tank, a third spur gear is fixed on the outer side of one end of the horizontal shaft, the plurality of third spur gears are sequentially engaged with each other, a second rotating motor is fixed on the outer wall of the precipitation tank, a fourth spur gear is fixed on the output shaft of the second rotating motor, and the fourth spur gear is engaged with one of the third spur gears.

[0019] Preferably, the two sides of the sedimentation tank are respectively fixed with a first hydraulic pipeline and a second hydraulic pipeline, the inside of the horizontal shaft is hollow, and the two ends of the horizontal shaft are respectively communicated with the first hydraulic pipeline and the second hydraulic pipeline through rotary joints, the inside of the horizontal shaft is provided with a hydraulic piston, the outside of the hydraulic piston is provided with a magnet A, the outside of the horizontal shaft is movably provided with a magnet B, the magnet B is fixed with a cleaning scraper, and the magnet A and the magnet B are attracted to each other.

[0020] Preferably, the magnet B is in an arc shape, the curvature of the magnet B matches the surface of the horizontal shaft, a limiting rod is fixed on the horizontal shaft, the limiting rod is clamped on the side of the magnet B away from the horizontal shaft, and a groove is formed in the side of the magnet B away from the horizontal shaft, and the limiting rod is located in the groove.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] A plurality of nozzles are equidistantly distributed at the bottom end of the precipitator adding pipe, and the precipitator adding pipe is horizontally moved by the horizontal driving mechanism, so that the precipitator is uniformly distributed in the sedimentation tank.

[0023] The two sides of the horizontal shaft in the sedimentation tank are provided with baffles and filter screens, after the precipitator is added, the horizontal shaft can be rotated to the vertical state of the baffle, so that the precipitate falls to the bottom of the tank, when the supernatant needs to be discharged, the horizontal shaft is rotated to the horizontal state of the baffle, the precipitate is blocked by the filter screen, the discharge pipe is conveniently opened to discharge the supernatant, solid-liquid separation is realized, and the treated water can be recycled, saving water resources.

[0024] When the precipitator adding pipe is horizontally moved, the first spur gear is engaged with the first rack to drive the rotating shaft to rotate, the blocking plates intermittently block the nozzles, so that the adjacent nozzles are not opened at the same time, the pressure when the precipitator is sprayed is improved, the premixing effect is enhanced, and the uniformity of spraying the precipitator is also improved.

[0025] Hydraulic oil is transported to the inside of the horizontal shaft through the first hydraulic pipeline and the second hydraulic pipeline, the hydraulic piston is pushed to move, the magnet A and the magnet B are attracted to each other, the cleaning scraper on the magnet B is moved along the horizontal shaft, and the filter screen is actively cleaned, so that the filtering effect of the filter screen is ensured.

[0026] When the precipitator adding pipe is horizontally moved, the second spur gear walks along the second rack, so as to drive the transmission shaft to rotate, and through the meshing of the second bevel gear and the first bevel gear, the stirrer can stir the wastewater, so as to improve the dispersity of the precipitator. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0028] Figure 1 is a first perspective view of the present application;

[0029] Figure 2 is a second perspective view of the present application;

[0030] Figure 3 is a front view of the present application;

[0031] Figure 4 is a schematic view of the baffle rotating to a horizontal state and being combined into an integral state of the present application;

[0032] Figure 5 is a schematic view of the baffle rotating to a vertical state and being separated from each other of the present application;

[0033] Figure 6 is a schematic view of the first hydraulic pipeline and the second hydraulic pipeline being connected with the horizontal shaft of the present application;

[0034] Figure 7 is a schematic view of the magnet B being connected with the horizontal shaft of the present application;

[0035] Figure 8 is a first perspective view of the precipitant adding pipe of the present application;

[0036] Figure 9 is a second perspective view of the precipitant adding pipe of the present application;

[0037] Figure 10 is a schematic view of the internal structure of the precipitant adding pipe of the present application;

[0038] Figure 11 is a schematic view of the position structure of the liquid introducing pipe of the present application;

[0039] Figure 12 is a schematic view of the position structure of the liquid introducing pipe of the present application; Figure 11

[0040] ​In the figure: 1 sedimentation tank, 101 liquid inlet pipe, 102 liquid outlet pipe, 2 support, 201 threaded rod, 202 guide rod, 203 first rotary motor, 204 threaded sleeve, 205 guide sleeve, 3 precipitant adding pipe, 301 spray head, 302 liquid inlet pipe, 303 submersible pump, 304 precipitant storage tank, 305 guide rail, 306 guide support, 307 rotating shaft, 308 blocking plate, 309 second spur gear, 310 second rack, 4 mounting strip, 401 stirrer, 402 stirring branch, 403 first bevel gear, 404 transmission shaft, 405 second bevel gear, 406 first spur gear, 407 first rack, 5 cross shaft, 501 baffle, 502 filter screen, 503 third spur gear, 504 second rotary motor, 505 fourth spur gear, 6 first hydraulic line, 601 second hydraulic line, 602 rotary joint, 7 magnet B, 701 cleaning scraper, 702 limiting rod, 703 groove. DETAILED DESCRIPTION

[0041] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. Embodiment 1

[0042] Reference Figures 1-12 A wastewater recycling treatment system in a potassium nitrate production process comprises a sedimentation tank 1, liquid inlet pipes 101 and liquid outlet pipes 102 are arranged on both sides of the sedimentation tank 1, a support 2 is arranged at the top end of the sedimentation tank 1, and a horizontal driving mechanism is installed on the support 2.

[0043] The output end of the horizontal driving mechanism is connected with a horizontally arranged precipitant adding pipe 3, a plurality of spray heads 301 are installed at the bottom end of the precipitant adding pipe 3, and the spray heads 301 are equidistantly distributed at the bottom end of the precipitant adding pipe 3.

[0044] The spray heads 301 are used for spraying precipitants into the sedimentation tank 1, the plurality of spray heads 301 can improve the uniformity of precipitant feeding, and the horizontal driving mechanism can drive the whole precipitant adding pipe 3 to move horizontally, further improving the uniformity of precipitant feeding.

[0045] A plurality of cross shafts 5 are rotatably installed in the sedimentation tank 1, baffles 501 are fixed on both sides of the cross shaft 5, and filter screens 502 are installed on the baffles 501; when the cross shaft 5 rotates to the horizontal position of the baffle 501, the plurality of baffles 501 are spliced into a whole.

[0046] After the precipitant is put in, the potassium nitrate ions in the wastewater react with the precipitant to form insoluble precipitate, and then the precipitate is settled. At this time, the horizontal shaft 5 is rotated to the position where the baffle 501 is in the vertical state (as shown in Figure 5 When the supernatant needs to be discharged, the horizontal shaft 5 is rotated to the position where the baffle 501 is in the horizontal position, and the precipitate is blocked by the filter screen 502. The horizontal height of the outlet pipe 102 is less than the horizontal height of the horizontal shaft 5. At this time, the valve of the outlet pipe 102 is opened, and the supernatant can be discharged. The treated water can be recycled, which saves water resources and facilitates solid-liquid separation. Example 2

[0047] With reference to 1-12, the difference between this embodiment and example 1 is that one end of the precipitant adding pipe 3 is connected with a liquid guide pipe 302, a precipitant storage tank 304 is placed on one side of the precipitate tank 1, and a submersible pump 303 is installed at the end of the liquid guide pipe 302 away from the precipitant adding pipe 3.

[0048] The precipitant is put in the precipitant storage tank 304, and is extracted by the submersible pump 303 and sprayed into the wastewater through the spray head 301, which can achieve the purpose of premixing.

[0049] The submersible pump 303 is fixed with a guide bracket 306, and the inner wall of the precipitant storage tank 304 is fixed with a horizontally arranged guide rail 305, and the guide bracket 306 is slidingly installed on the guide rail 305.

[0050] The submersible pump 303 can be stably moved and maintained. Example 3

[0051] With reference to 1-12, the difference between this embodiment and example 1 is that the horizontal driving mechanism includes a threaded rod 201 rotatably installed on the bracket 2, the threaded rod 201 is driven by a first rotary motor 203, the bracket 2 is further fixed with guide rods 202 on both sides of the threaded rod 201, a threaded sleeve 204 is installed 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 further installed on the outside of the two guide rods 202, and the bottom end of the threaded sleeve 204 is fixed with the precipitant adding pipe 3.

[0052] When the first rotary motor 203 is turned on to drive the threaded rod 201 to rotate, the threaded sleeve 204 can be horizontally moved, thereby achieving the purpose of driving the precipitant adding pipe 3 to move horizontally. Example 4

[0053] With reference to 1-12, the difference between this embodiment and embodiment 3 is that the inside of the precipitant adding pipe 3 is provided with a rotating shaft 307, the outside of the rotating shaft 307 is fixedly provided with a plurality of blocking plates 308, the blocking plates 308 correspond to the positions of the nozzles 301 one by one, and the blocking plates 308 are staggered on the outside of the rotating shaft 307, one end of the rotating shaft 307 extends to the outside of the precipitant adding pipe 3 and is fixedly provided with a first spur gear 406, the support 2 is fixedly provided with a first rack 407 arranged horizontally, the first spur gear 406 meshes with the first rack 407, when the precipitant adding pipe 3 moves horizontally, the first spur gear 406 walks along the first rack 407, thereby driving the rotating shaft 307 to rotate relative to the precipitant adding pipe 3, in the process of rotation, the blocking plates 308 will intermittently block the nozzles 301, so that the adjacent nozzles 301 are not opened at the same time at the same time, and fewer nozzles 301 can improve the pressure when the precipitant is sprayed out, improve the premixing effect, and also improve the uniformity of spraying the precipitant. Embodiment 5

[0054] With reference to 1-12, the difference between this embodiment and embodiment 3 is that the precipitant adding pipe 3 is fixedly provided with a mounting strip 4 on one side, a plurality of stirrers 401 are rotatably mounted on the mounting strip 4, the bottom end of the stirrer 401 is provided with a stirring branch 402, the top end of the stirrer 401 is fixedly provided with a first bevel gear 403, the top end of the mounting strip 4 is rotatably provided with a transmission shaft 404, the outside of the transmission shaft 404 is fixedly provided with a plurality of second bevel gears 405, the first bevel gear 403 and the second bevel gear 405 correspondingly mesh, one end of the transmission shaft 404 is fixedly provided with a second spur gear 309, the inner wall of the sedimentation tank 1 is fixedly provided with a second rack 310 arranged horizontally, the second spur gear 309 meshes with the second rack 310;

[0055] When the precipitant adding pipe 3 moves horizontally, the second spur gear 309 walks along the second rack 310, thereby driving the transmission shaft 404 to rotate, and through the meshing of the second bevel gear 405 and the first bevel gear 403, the stirrer 401 can be driven to stir the wastewater, thereby improving the dispersity of the precipitant;

[0056] Both ends of the horizontal shaft 5 extend to the outside of the sedimentation tank 1, and the outside of one end of the horizontal shaft 5 is fixedly provided with a third spur gear 503, a plurality of third spur gears 503 are sequentially meshed with each other, the outer wall of the sedimentation tank 1 is fixedly provided with a second rotating motor 504, the output shaft of the second rotating motor 504 is fixedly provided with a fourth spur gear 505, and the fourth spur gear 505 meshes with one of the third spur gears 503;

[0057] In order to drive the rotation of the horizontal shafts 5 synchronously to switch the filtering and non-filtering states, when the second rotating motor 504 is started, one of the horizontal shafts 5 can be driven to rotate through the meshing of the fourth spur gear 505 and one of the third spur gears 503, and then the remaining horizontal shafts 5 can be synchronously driven to rotate through the meshing of the third spur gears 503 in sequence, and the directions of rotation of the adjacent horizontal shafts 5 are opposite. Embodiment 6

[0058] With reference to 1-12, the difference between the present embodiment and embodiment 5 is that the first hydraulic pipeline 6 and the second hydraulic pipeline 601 are respectively fixed on the two sides of the sedimentation tank 1, the horizontal shaft 5 is hollow inside, and the two ends of the horizontal shaft 5 are respectively communicated with the first hydraulic pipeline 6 and the second hydraulic pipeline 601 through the rotating joints 602, the hydraulic piston is installed inside the horizontal shaft 5, the magnet A is installed outside the hydraulic piston, the magnet B 7 is movably installed outside the horizontal shaft 5, the cleaning scraper 701 is fixed on the magnet B 7, and the magnet A and the magnet B 7 are attracted to each other.

[0059] The hydraulic oil can be respectively delivered from the two ends to the inside of the horizontal shaft 5 through the first hydraulic pipeline 6 and the second hydraulic pipeline 601, the hydraulic piston can be horizontally moved in the inside of the horizontal shaft 5 through the oil pressure, the magnet B 7 can be horizontally moved along the axial direction of the horizontal shaft 5 through the mutual attraction of the magnet A and the magnet B 7, and then the cleaning scraper 701 can be moved along the axial direction of the horizontal shaft 5 to actively clean the filter screen 502.

[0060] The magnet B 7 is in an arc structure, the curvature of the magnet B 7 matches the surface of the horizontal shaft 5, the limiting rod 702 is fixed on the horizontal shaft 5, the limiting rod 702 is clamped on the side of the magnet B 7 away from the horizontal shaft 5, a groove 703 is formed on the side of the magnet B 7 away from the horizontal shaft 5, and the limiting rod 702 is located in the groove 703.

[0061] The stable movement of the magnet B on the horizontal shaft 5 can be ensured, and the magnet B can be prevented from falling off.

[0062] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0063] In this application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and other terms should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0064] The control mode of the application is automatically controlled by the controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The power supply also belongs to the common knowledge in the art, and the application is mainly used to protect the mechanical device, so the control mode and circuit connection of the application will not be explained in detail.

[0065] The above is only the preferred specific embodiment of the application, but the protection scope of the application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered within the protection scope of the application.

Claims

1. A device for recycling waste water in a potassium nitrate production process, characterized in that: Including the sedimentation tank (1), both sides of the sedimentation tank (1) are respectively equipped with liquid inlet pipe (101) and liquid outlet pipe (102), the top end of the sedimentation tank (1) is equipped with support (2), the horizontal drive mechanism is installed on the support (2); The output end of the horizontal drive mechanism is connected with the horizontally arranged precipitant adding pipe (3), the bottom end of the precipitant adding pipe (3) is installed with multiple spray heads (301), the spray heads (301) are equidistantly distributed at the bottom end of the precipitant adding pipe (3); One end of the precipitant adding pipe (3) is connected with the liquid guide pipe (302), one side of the sedimentation tank (1) is placed with the precipitant storage tank (304), the end of the liquid guide pipe (302) away from the precipitant adding pipe (3) is installed with the submersible pump (303); The horizontal drive mechanism includes the threaded rod (201) rotatably installed on the support (2), the threaded rod (201) is driven by the first rotary motor (203), the guide rods (202) are also fixed on both sides of the threaded rod (201) on the support (2), the threaded sleeve (204) is installed on the outside of the threaded rod (201), the guide sleeves (205) are fixed on both sides of the threaded sleeve (204), the two guide sleeves (205) are also installed on the outside of the two guide rods (202), and the bottom end of the threaded sleeve (204) is fixed with the precipitant adding pipe (3); The inside of the precipitant adding pipe (3) is installed with the rotating shaft (307), the multiple blocking plates (308) are fixed on the outside of the rotating shaft (307), the blocking plates (308) correspond to the positions of the spray heads (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 adding pipe (3) and is fixed with the first spur gear (406), the first rack (407) is fixed horizontally on the support (2), the first spur gear (406) is engaged with the first rack (407), when the precipitant adding pipe (3) moves horizontally, the first spur gear (406) walks along the first rack (407), thereby driving the rotating shaft (307) to rotate relative to the precipitant adding pipe (3), in the process of rotation, the blocking plates (308) will intermittently block the spray heads (301), so that the adjacent spray heads (301) are not opened at the same time at the same time; Multiple horizontal shafts (5) are rotatably installed in the inside of the sedimentation tank (1), the baffles (501) are fixed on both sides of the horizontal shaft (5), the filter screens (502) are installed on the baffles (501), when the horizontal shaft (5) rotates to the horizontal position of the baffle (501), multiple baffles (501) are spliced into an integral whole; The both sides of the sedimentation tank (1) are respectively fixed with a first hydraulic pipeline (6) and a second hydraulic pipeline (601), the inside of the horizontal shaft (5) is hollow, and the both ends of the horizontal shaft (5) are respectively communicated with the first hydraulic pipeline (6) and the second hydraulic pipeline (601) through rotary joints (602), the inside of the horizontal shaft (5) is installed with a hydraulic piston, the outside of the hydraulic piston is installed with a magnet A, the outside of the horizontal shaft (5) is movably installed with a magnet B (7), the magnet B (7) is fixed with a cleaning scraper (701), the magnet A and the magnet B (7) are attracted to each other; The horizontal height of the liquid outlet pipe (102) is less than the horizontal height of the horizontal shaft (5); The both ends of the horizontal shaft (5) extend to the outside of the sedimentation tank (1), and the outside of one end of the horizontal shaft (5) is fixed with a third spur gear (503), a plurality of third spur gears (503) are sequentially meshed with each other, the outer wall of the sedimentation tank (1) is fixed with a second rotary motor (504), the output shaft of the second rotary motor (504) is fixed with a fourth spur gear (505), and the fourth spur gear (505) is meshed with one of the third spur gears (503). The magnet B (7) is in an arc structure, the curvature of the magnet B (7) matches the surface of the horizontal shaft (5), a limiting rod (702) is fixed on the horizontal shaft (5), the limiting rod (702) is clamped on the side of the magnet B (7) away from the horizontal shaft (5), and a groove (703) is formed in the side of the magnet B (7) away from the horizontal shaft (5), and the limiting rod (702) is located in the groove (703).

2. The device for recycling wastewater in the production process of potassium nitrate according to claim 1, characterized in that: The submersible pump (303) is fixed with a guide bracket (306), and the inner wall of the precipitant storage tank (304) is fixed with a horizontally arranged guide rail (305), and the guide bracket (306) is slidingly installed on the guide rail (305).

3. The device for recycling wastewater in the production process of potassium nitrate according to claim 1, characterized in that: One side of the precipitant adding pipe (3) is fixed with a mounting strip (4), a plurality of stirrers (401) are rotatably installed on the mounting strip (4), the bottom end of the stirrer (401) is provided with a stirring branch (402), the top end of the stirrer (401) is fixed with a first bevel gear (403), the top end of the mounting strip (4) is rotatably installed with a transmission shaft (404), the outside of the transmission shaft (404) is fixed with a plurality of second bevel gears (405), the first bevel gear (403) and the second bevel gear (405) are correspondingly meshed, one end of the transmission shaft (404) is fixed with a second spur gear (309), the inner wall of the sedimentation tank (1) is fixed with a horizontally arranged second rack (310), and the second spur gear (309) is meshed with the second rack (310).

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