Solid-liquid separation device for wastewater in potassium nitrate production process

Abstract

The utility model discloses a potassium nitrate production process wastewater solid-liquid separation device which comprises a plurality of transverse shafts rotatably mounted in a sedimentation tank, baffles are fixed on two sides of the transverse shafts, filter screens are mounted on the baffles, and when the transverse shafts rotate to the baffles to be positioned at horizontal positions, the baffles are mutually spliced into a whole; a liquid inlet pipe and a liquid outlet pipe are respectively arranged on two sides of the sedimentation tank, and the horizontal height of the liquid outlet pipe is smaller than that of the transverse shaft. The baffle and the filter screen are arranged on the two sides of the transverse shaft in the sedimentation tank, and after a precipitant is put, the transverse shaft can be rotated to the baffle in a vertical state, so that precipitates fall to the bottom of the tank; when supernate needs to be discharged, the transverse shaft is rotated to the horizontal state of the baffle, sediment is blocked by the filter screen, the liquid outlet pipe is conveniently opened to discharge the supernate, solid-liquid separation is achieved, treated water can be recycled, and water resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of potassium nitrate production, in particular to a solid-liquid separation device for wastewater in a potassium nitrate production process. Background Art

[0002] In modern industrial production, potassium nitrate, as an important chemical raw material, is widely used in various fields. As the scale of potassium nitrate production continues to expand, the problem of wastewater treatment generated during its production process has become increasingly prominent.

[0003] Currently, during the production of potassium nitrate, wastewater typically contains large amounts of potassium nitrate ions and other impurities. Directly discharging this wastewater without effective treatment not only causes serious environmental pollution but also wastes large amounts of water resources. Existing wastewater treatment plants have several drawbacks when treating wastewater from potassium nitrate production.

[0004] In existing technologies, the solid-liquid separation process is relatively cumbersome, making it difficult to achieve fast and efficient separation operations. At the same time, the filter screen is easily clogged 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 utility model provides a solid-liquid separation device for wastewater in a potassium nitrate production process, aiming to overcome the shortcomings of the existing technology, improve the effect and efficiency of wastewater treatment, realize the recycling of water resources, and reduce pollution to the environment. Utility Model Content

[0006] In order to solve the problems mentioned in the above background technology, the utility model provides a solid-liquid separation device for wastewater in a potassium nitrate production process.

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

[0008] A solid-liquid separation device for wastewater from a potassium nitrate production process includes multiple horizontal shafts rotatably mounted inside a sedimentation tank, with baffles fixed on both sides of the horizontal shafts, and filter screens mounted on the baffles. When the horizontal shafts rotate until the baffles are in a horizontal position, the multiple baffles are spliced ​​together to form a whole.

[0009] A liquid inlet pipe and a liquid outlet pipe are respectively provided on both sides of the sedimentation tank, and the horizontal height of the liquid outlet pipe is smaller than the horizontal height of the horizontal axis.

[0010] 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 the plurality of third spur gears are meshed with each other in sequence.

[0011] Preferably, a second rotating motor is fixed on the outer wall of the sedimentation tank, 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.

[0012] Preferably, a first hydraulic pipeline and a second hydraulic pipeline are fixed on both sides of the sedimentation tank respectively, the interior of the horizontal axis is hollow, and the two ends of the horizontal axis are connected to the first hydraulic pipeline and the second hydraulic pipeline respectively through rotary joints, and a hydraulic piston is installed inside the horizontal axis.

[0013] Preferably, a magnet A is installed on the outside of the hydraulic piston, a magnet B is movably installed on the outside of the horizontal axis, a cleaning scraper is fixed on the magnet B, and the magnet A and the magnet B attract each other.

[0014] Preferably, the magnet B has an arc-shaped structure, and the curvature of the magnet B matches the surface of the horizontal axis. A limit rod is fixed on the horizontal axis, and the limit rod is stuck on the side of the magnet B away from the horizontal axis. A groove is provided on the side of the magnet B away from the horizontal axis, and the limit rod is located in the groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] Baffles and filter screens are installed 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 screen, making it convenient to open the liquid outlet pipe to discharge the supernatant, realizing solid-liquid separation. The treated water can be recycled to save water resources.

[0017] 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, actively cleaning the filter screen to ensure the filtering effect of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0019] Figure 1 This is a first-perspective stereogram of the present invention;

[0020] Figure 2 This is a second perspective stereogram of the present invention;

[0021] Figure 3This is the main view of the utility model;

[0022] Figure 4 This is a schematic diagram of the baffles of the utility model rotated to a horizontal state and combined with each other to form an overall state;

[0023] Figure 5 This is a schematic diagram of the baffles of the present invention rotated to a vertical state and separated from each other;

[0024] Figure 6 This is a schematic diagram of the connection relationship between the first hydraulic pipeline and the second hydraulic pipeline and the horizontal axis of the utility model;

[0025] Figure 7 This is a schematic diagram of the connection relationship between the magnet B and the horizontal axis of the present invention;

[0026] Figure 8 This is an enlarged detail view of the precipitant addition tube of the utility model from the first perspective;

[0027] Figure 9 This is an enlarged detail view of the precipitant addition tube of the utility model from a second perspective;

[0028] Figure 10 This is a schematic diagram of the internal structure of the precipitant adding tube of the utility model;

[0029] Figure 11 This is a schematic diagram of the position structure of the liquid guide tube of the present utility model;

[0030] Figure 12 for Figure 11 A magnified detail of position A in the middle;

[0031] In the figure: 1 sedimentation tank, 101 liquid inlet pipe, 102 liquid outlet pipe, 2 bracket, 201 threaded rod, 202 guide rod, 203 first rotary motor, 204 threaded sleeve, 205 guide sleeve, 3 precipitant addition pipe, 301 nozzle, 302 liquid guide pipe, 303 submersible pump, 304 precipitant 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 shaft, 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

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention. Example 1

[0033] Reference Figure 1-12 A solid-liquid separation device for wastewater from a potassium nitrate production process includes a sedimentation tank 1, 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 drive mechanism is installed on the bracket 2;

[0034] 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. The nozzles 301 are evenly distributed at the bottom end of the precipitant addition pipe 3;

[0035] The nozzle 301 is used to spray the precipitant into the sedimentation tank 1. Multiple nozzles 301 can improve the uniformity of precipitant addition. The horizontal driving mechanism can drive the precipitant addition pipe 3 to move horizontally as a whole, further improving the uniformity of precipitant addition.

[0036] The sedimentation tank 1 is internally rotatably mounted with multiple horizontal shafts 5, with baffles 501 fixed on both sides of the horizontal shaft 5. Filter screens 502 are mounted on the baffles 501. When the horizontal shaft 5 is rotated until the baffles 501 are in a horizontal position, the multiple baffles 501 are spliced ​​together to form a whole.

[0037] 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), 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. The sediment will be blocked by the filter screen 502, and 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 solid-liquid separation more convenient. Example 2

[0038] 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 diversion pipe 302, a precipitant storage tank 304 is placed on one side of the sedimentation tank 1, and a submersible pump 303 is installed on the end of the liquid diversion pipe 302 away from the precipitant addition pipe 3;

[0039] 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 pre-mixing.

[0040] 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 horizontal guide rail 305, on which the guide bracket 306 is slidably mounted.

[0041] It can ensure the stable movement of the submersible pump 303 and facilitate maintenance. Example 3

[0042] Referring to 1-12, the difference between this embodiment and embodiment 1 is that the horizontal drive mechanism includes a threaded rod 201 rotatably mounted on a bracket 2, the threaded rod 201 being driven by a first rotary motor 203, guide rods 202 being fixed to 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, and 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, respectively, and the bottom ends of the threaded sleeves 204 being fixed to the precipitant addition tube 3;

[0043] When the first rotary 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

[0044] Referring to 1-12, the difference between this embodiment and Example 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 straight gear 406. A horizontally arranged first rack 407 is fixed on the bracket 2. The first straight gear 406 is engaged with the first rack 407. When the precipitant addition tube 3 moves horizontally, the first straight 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 plates 308 will intermittently block the nozzles 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, improve the premixing effect, and also improve the uniformity of spraying the precipitant. Example 5

[0045] 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, and a plurality of agitators 401 are rotatably mounted on the mounting bar 4. The bottom end of the agitator 401 is provided with a stirring branch 402, and 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, and 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, and a horizontally arranged second rack 310 is fixed to the inner wall of the sedimentation tank 1, and the second spur gear 309 is meshed with the second rack 310;

[0046] 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. The second bevel gear 405 meshes with the first bevel gear 403 to drive the agitator 401 to stir the wastewater, thereby improving the dispersion of the precipitant.

[0047] 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. The 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. The output shaft of the second rotating motor 504 is fixed to a fourth spur gear 505. The fourth spur gear 505 is meshed with one of the third spur gears 503.

[0048] In order to drive the synchronous rotation of each horizontal shaft 5 to switch the filtering and non-filtering states, when the second rotating motor 504 is turned on, one of the horizontal shafts 5 can be driven to rotate through the engagement of the fourth spur gear 505 with one of the third spur gears 503, and then the remaining horizontal shafts 5 are driven to rotate synchronously through the mutual engagement of multiple third spur gears 503 in sequence, and the directions of rotation of adjacent horizontal shafts 5 are opposite. Example 6

[0049] Referring to 1-12, the difference between this embodiment and embodiment 5 is that a first hydraulic pipeline 6 and a second hydraulic pipeline 601 are respectively 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 respectively connected to the first hydraulic pipeline 6 and the second hydraulic pipeline 601 through a rotary joint 602, a hydraulic piston is installed inside the horizontal axis 5, a magnet A is installed on the outside of the hydraulic piston, a magnet B7 is movably installed on the outside of 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;

[0050] 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, and then drive the cleaning scraper 701 to move along the axial direction of the horizontal axis 5 to actively clean the filter 502.

[0051] The magnet B7 has an arc-shaped structure, and the curvature of the magnet B7 matches the surface of the horizontal axis 5. A limit rod 702 is fixed on the horizontal axis 5. The limit rod 702 is clamped on the side of the magnet B7 away from the horizontal axis 5. A groove 703 is formed on the side of the magnet B7 away from the horizontal axis 5, and the limit rod 702 is located in the groove 703.

[0052] This ensures the stable movement of the magnet B on the horizontal axis 5 while preventing it from falling off.

[0053] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0054] In this utility model, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to mechanical connection, direct connection, or indirect connection through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0055] 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. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0056] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A solid-liquid separation device for wastewater from a potassium nitrate production process, characterized in that: The invention comprises a plurality of transverse shafts (5) rotatably mounted inside a sedimentation tank (1), baffles (501) being fixed on both sides of the transverse shaft (5), and filter screens (502) being mounted on the baffles (501), and when the transverse shaft (5) is rotated until the baffles (501) are in a horizontal position, the plurality of baffles (501) are spliced ​​together to form a whole; A liquid inlet pipe (101) and a liquid outlet pipe (102) are respectively provided on both sides of the sedimentation tank (1), and the horizontal height of the liquid outlet pipe (102) is less than the horizontal height of the horizontal axis (5).

2. A potassium nitrate production process wastewater solid-liquid separation device according to claim 1, characterized in that: 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.

3. A potassium nitrate production process wastewater solid-liquid separation device according to claim 2, characterized in that: A second rotating motor (504) is fixed on the outer wall of the sedimentation tank (1), 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).

4. A potassium nitrate production process wastewater solid-liquid separation device according to claim 1, characterized in that: A first hydraulic pipeline (6) and a second hydraulic pipeline (601) are fixed on both sides of the sedimentation tank (1), the interior of the transverse axis (5) is hollow, and both ends of the transverse axis (5) are connected to the first hydraulic pipeline (6) and the second hydraulic pipeline (601) via rotary joints (602), and a hydraulic piston is installed inside the transverse axis (5).

5. A potassium nitrate production process wastewater solid-liquid separation device according to claim 4, characterized in that: A magnet A is mounted on the outside of the hydraulic piston, a magnet B (7) is movably mounted on the outside of the transverse shaft (5), a cleaning scraper (701) is fixed on the magnet B (7), and the magnet A and the magnet B (7) attract each other.

6. A potassium nitrate production process wastewater solid-liquid separation device according to claim 5, characterized in that: The magnet B (7) has an arc-shaped structure, and the curvature of the magnet B (7) matches the surface of the horizontal axis (5). A limiting rod (702) is fixed on the horizontal axis (5), and the limiting rod (702) is clamped on the side of the magnet B (7) away from the horizontal axis (5). A groove (703) is provided on the side of the magnet B (7) away from the horizontal axis (5), and the limiting rod (702) is located in the groove (703).

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