Distillation equipment and distillation method for nitric acid purification

Abstract

The invention discloses distillation equipment for nitric acid purification and a distillation method, and relates to the technical field of nitric acid distillation.The distillation equipment for nitric acid purification comprises an equipment frame, a motor is fixedly installed above the equipment frame, and an exhaust pipe is fixedly installed on the circumferential surface of the equipment frame; a feeding pipe fixedly penetrates through the circumferential surface of the equipment frame, an air outlet pipe fixedly penetrates through the circumferential surface of the equipment frame, a condensation pipe is fixedly installed in the equipment frame, and the condensation pipe comprises a rotating rod, a connecting pipe, a rotating shaft, fan blades, a convex plate, a bearing block, a connecting plate, a sleeve, a circular plate, an arc block, a bearing plate and an arc plate; the connecting pipe is fixedly mounted in the equipment frame, and the rotating shaft is rotatably mounted on the circumferential surface of the connecting pipe, so that the fan blades can move up and down while rotating, and incomplete distillation caused by layering of the interior of nitric acid is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of nitric acid distillation, in particular to a distillation device and a distillation method for nitric acid purification. Background Art

[0002] In the field of electroplating and PCB manufacturing, nitric acid stripping is widely used. A large amount of nitric acid waste liquid is generated. This type of waste liquid contains heavy metals such as copper and nickel, as well as high-concentration acid, total nitrogen, and other pollutants. Waste nitric acid can be purified and recovered by distillation. In the prior art, vacuum distillation equipment is mainly used for treatment. The working pressure of vacuum distillation equipment is close to vacuum, and the boiling point can be reached at low temperature. At the same time, under low temperature conditions, nitric acid has little corrosion to steel distillation equipment.

[0003] The patent with the patent announcement number CN210356066U relates to the technical field of nitric acid distillation. This patent provides a vacuum distillation equipment for waste nitric acid treatment, including an evaporation tank, with a first outlet and a second outlet respectively arranged at the top and bottom; a booster pump connected to the second outlet; a spray head arranged in the evaporation tank and connected to the outlet of the booster pump; a steam condenser connected to the first outlet; a vacuum pump connected to the outlet of the steam condenser; a storage tank connected to the outlet of the vacuum pump; a plurality of demisting plates evenly spaced in the evaporation tank and located between the first outlet and the spray head; a plurality of liquid receiving plates evenly spaced in the evaporation tank and located below the spray head and above the liquid surface; a heating pipe arranged in the evaporation tank. This patent expands the evaporation area from the small plane of the liquid surface to the entire three-dimensional space in the tank body by adding a spray head and adding a liquid receiving plate between the spray head and the liquid surface, greatly increasing the evaporation area.

[0004] In the above patent, when nitric acid is distilled, nitric acid is placed in an evaporation tank. During the heating process, the liquid receiving plate is squeezed by a booster pump, and the evaporation area is expanded from a small plane of the liquid surface to the entire three-dimensional space in the tank body through a spray head, which greatly increases the evaporation area. However, in the process of distilling the nitric acid solution in the above patent, impurities in the solution may be stratified, which will cause uneven heating of the nitric acid solution and reduce its purification efficiency. Therefore, a distillation device for nitric acid purification is designed to prevent solution stratification. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a distillation device for purifying nitric acid, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a distillation device and a distillation method for nitric acid purification, comprising a device frame and a condensation frame, a motor is fixedly installed on the top of the device frame, an exhaust pipe is fixedly penetrated through the circumferential surface of the device frame, a feed pipe is fixedly penetrated through the inner and outer walls of the device frame, and a water outlet pipe is fixedly penetrated through the circumferential surface of the condensation frame, including a stirring device; wherein the stirring device comprises a rotating rod, a connecting pipe, a rotating shaft, a fan blade, a sleeve, a convex plate, a receiving block, a connecting plate, a circular plate, an arc block, a receiving plate and an arc plate, the rotating rod is fixedly installed on the output end of the motor, the connecting pipe is slidably installed on the circumferential surface of the rotating rod, and the rotating shaft is rotatably installed on the circumferential surface of the connecting pipe The fan blades are fixedly mounted on the circumferential surface of the rotating shaft, the sleeve is fixedly mounted on the top of the inner wall of the equipment frame, the convex plate is fixedly mounted on the bottom of the sleeve, the receiving block is fixedly mounted on the top of the connecting pipe, a slide groove is opened inside the connecting pipe, the connecting plate is slidably mounted inside the slide groove, the circular plate is rotatably mounted on the circumferential surface of the sleeve, the arc block is fixedly mounted above the fan blades, the receiving plate is rotatably mounted inside the arc block, and the arc plate is fixedly mounted below the circular plate. The connecting pipe moves upward to drive the receiving block to move upward, and the convex plate is repeatedly contacted and squeezed with the receiving block to squeeze the connecting pipe upward, which drives the receiving block to move upward, and the convex plate is repeatedly contacted and squeezed with the receiving block.

[0007] According to the above technical solution, one end of the convex plate away from the sleeve is set as an arc surface, one end of the receiving plate away from the arc block is rotatably connected to the inside of the arc plate, the top of the receiving block is set as a beveled surface, the connecting plate is fixedly connected to the rotating rod, the receiving block rotates to contact and squeeze the convex plate, so that the receiving block moves downward, and the rotation of the receiving plate drives the arc plate to rotate.

[0008] According to the above technical solution, a telescopic elastic rod 1 is fixedly installed on the top of the connecting plate, and the free end of the telescopic elastic rod 1 is fixedly connected to the bottom of the connecting tube. The connecting tube moves downward to contact and squeeze the telescopic end of the telescopic elastic rod 1 to shrink, and then the telescopic elastic rod 1 is reset to drive the connecting tube to move upward, and the connecting tube moves upward to drive the receiving block to move upward.

[0009] According to the above technical scheme, the cleaning device includes a scraper, a long plate, a slider, a baffle and a bevel block, the scraper is fixedly mounted on the circumferential surface of the rotating rod, the long plate is slidably mounted on the inner wall of the equipment frame, a second slide groove is opened on the surface of the long plate, the slider is slidably mounted inside the second slide groove, a discharge port is opened inside the equipment frame, the baffle is hinged on the inner wall of the discharge port, the bevel block is slidably mounted above the baffle, the rotation of the connecting pipe drives the scraper to rotate, the rotation of the scraper contacts the side of the slider that is not the arc surface, and drives the slider to rotate to revolve around the rotating rod as the center, the rotation of the slider drives the long plate to revolve, and the long plate revolves.

[0010] According to the above technical solution, the side of the slider close to the scraper is set to arc surface 2, the side of the bevel block away from the equipment frame is set to arc surface 3, the scraper is in contact with the long plate, the bottom of the bevel block is slidably connected to the bottom of the equipment frame, and a clockwork spring is arranged between the baffle and the bevel block. The movement of the bevel block releases the limitation on the baffle. After the limitation is released, the baffle rotates to open the discharge port, and the baffle can be reset when it rotates upward through the clockwork spring between the baffle and the bevel block.

[0011] According to the above technical solution, a telescopic elastic rod is fixedly installed inside the second slide groove, and the free end of the telescopic elastic rod is fixedly connected to the top of the slider. The rotation of the connecting pipe drives the scraper to rotate. When the scraper rotates forward and contacts the extruder to move upward, the slider contacts and squeezes the telescopic end of the telescopic elastic rod to shrink and then reset.

[0012] According to the above technical scheme, the water spraying device includes a water tank, a rotating frame, a water gun, a movable block, a protrusion, a touch plate and a fixed plate. The water tank is fixedly installed on the top of the inner wall of the equipment frame, the rotating frame is rotatably installed under the water tank, the water gun is fixedly penetrated through the inner and outer walls of the water tank, the movable block is slidably installed inside the rotating frame, the protrusion slides through the inner and outer walls of the rotating frame, the touch plate is fixedly installed on the side of the movable block away from the protrusion, and the fixed plate is fixedly installed above the rotating frame. The touch plate rotates to contact the water gun, and the long plate rotates to squeeze the protrusion to contract, thereby releasing the limit on the protrusion. The contraction of the protrusion does not drive the rotating frame to rotate, and at the same time, the water outlet and the water gun overlap.

[0013] According to the above technical solution, the side of the moving block close to the protrusion is set as arc surface four, the side of the protrusion away from the moving block is set as arc surface five, and a spring one is arranged between the fixed plate and the moving block. When the long plate is out of contact with the protrusion, the spring contracts and resets under the action of the water gun, thereby blocking the water gun.

[0014] A distillation method for a distillation device for nitric acid purification comprises the following steps: Step 1: Start the motor, the motor output end rotates to drive the rotating rod and the connecting pipe to rotate, and the connecting pipe rotates to drive the rotating shaft to rotate; Step 2: The rotating shaft rotates to drive the fan blades to rotate, and at the same time, the connecting pipe rotates to drive the receiving block to rotate, contact and squeeze the convex plate, so that the receiving block moves downward; Step 3: The receiving block moves downward to drive the connecting tube to move downward to contact and squeeze the telescopic end of the telescopic elastic rod 1 to shrink, and then the telescopic elastic rod 1 is reset to drive the connecting tube to move upward; Step 4: The up and down movement of the pipe drives the shaft and the fan blades to move up and down, so that the fan blades move up and down while rotating to prevent stratification inside the nitric acid.

[0015] The present invention provides a distillation device and a distillation method for purifying nitric acid, which have the following beneficial effects:

[0016] (1) The distillation equipment and distillation device for purifying nitric acid achieves stirring of nitric acid liquid through the coordinated operation of the rotating rod, the connecting pipe, the rotating shaft and the fan blades, thereby preventing stratification inside the nitric acid and causing incomplete distillation. The fan blades can rotate while the connecting pipe moves up and down through the coordinated operation of the convex plate, the receiving block, the connecting plate, the sleeve, the circular plate, the arc block, the receiving plate and the arc plate, thereby increasing the area for stirring the nitric acid, accelerating the stirring efficiency and increasing the speed of distilling the nitric acid.

[0017] (2) The distillation equipment and distillation device for purifying nitric acid realizes the cleaning of the bottom and inner wall of the equipment frame through the coordinated operation between the scraper, the long plate, the slider, and the telescopic elastic rod, thereby preventing excessive accumulation of dust and dirt inside the equipment, which may cause impurities to be mixed into the nitric acid during distillation, resulting in incomplete distillation. The coordinated operation between the bevel block and the baffle helps to improve the purity of the distillation product. During the distillation of nitric acid, the residue mainly includes non-volatile impurities or degradation products. These impurities may affect the purity of the final product, resulting in the presence of undesirable components in the obtained nitric acid. Regular cleaning of the residue can ensure that these impurities are not mixed into the final product during the distillation process.

[0018] (3) The distillation equipment and distillation device for nitric acid purification realizes that the water gun sprays water from the inside of the equipment through the water tank, through the coordinated operation between the water tank, the rotating frame, the water gun, the moving block, the protrusion, and the touch plate, which can help loosen and flush the residue inside the equipment, making it easier to remove and ensure that the equipment is thoroughly cleaned. Regular water spraying can prevent the equipment pipes or slots from being blocked due to waste accumulation and maintain the normal circulation of the equipment. The coordinated operation between the fixed plate and the spring realizes the water gun intermittently spraying water inside the equipment. Intermittent water spraying can effectively save water resources. When necessary, short-term water spraying is performed to flush the surface of the equipment or flush the residue, which can reduce the water consumption while achieving the purpose of cleaning. Intermittent water spraying can reduce continuous impact and wear on the inside of the equipment. Intermittent water spraying can be cleaned more gently to extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the connection pipe position of the scraper of the present invention;

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure in the middle;

[0023] Figure 5 This is a schematic diagram of the positions of the circular plate and sleeve of the structure of the present invention;

[0024] Figure 6 The bottom cross-section of the structure of the present invention is a schematic diagram showing the structure;

[0025] Figure 7 For the present invention Figure 6 Middle B is an enlarged schematic diagram of the structure;

[0026] Figure 8 This is a schematic diagram of the water tank and rotating frame position structure of the present invention;

[0027] Fig. 9 For the present invention Figure 7 Enlarged schematic diagram of the C structure in the middle.

[0028] In the figure: 1, equipment frame; 102, discharge port; 2, motor; 3, exhaust pipe; 4, feed pipe; 5, water outlet pipe; 6, condensing frame; 7, rotating rod; 8, connecting pipe; 801, slide groove one; 9, rotating shaft; 10, fan blade; 11, convex plate; 12, receiving block; 13, connecting plate; 14, telescopic elastic rod one; 15, sleeve; 16, round plate; 17, arc block; 18, receiving plate; 19, arc plate; 201, scraper; 202, long plate; 203, slide groove two; 204, slider; 205, telescopic elastic rod two; 206, baffle; 207, bevel block; 211, water tank; 212, rotating frame; 213, water gun; 214, moving block; 215, convex block; 216, touch plate; 217, fixed plate; 218, spring one; 219, water outlet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0030] See also Figure 1-Figure 9One embodiment of the present invention is: a distillation device for nitric acid purification, comprising an equipment frame 1 and a condensation frame 6, a motor 2 is fixedly installed on the top of the equipment frame 1, an exhaust pipe 3 is fixedly penetrated through the circumferential surface of the equipment frame 1, a feed pipe 4 is fixedly penetrated through the inner and outer walls of the equipment frame 1, and a water outlet pipe 5 is fixedly penetrated through the circumferential surface of the condensation frame 6, including a stirring device; wherein the stirring device comprises a rotating rod 7, a connecting pipe 8, a rotating shaft 9, a fan blade 10, a sleeve 15, a convex plate 11, a receiving block 12, a connecting plate 13, a circular plate 16, an arc block 17, a receiving plate 18 and an arc plate 19, the rotating rod 7 is fixedly installed at the output end of the motor 2, the connecting pipe 8 is slidably installed on the circumferential surface of the rotating rod 7, the rotating shaft 9 is rotatably installed on the circumferential surface of the connecting pipe 8, the fan blade 10 is fixedly installed on the circumferential surface of the rotating shaft 9, and the sleeve 15 is fixedly installed on the convex plate 11, the receiving block 12, the connecting plate 13, the circular plate 16, the arc block 17, the receiving plate 18 and the arc plate 19, the rotating rod 7 is fixedly installed on the output end of the motor 2, the connecting pipe 8 is slidably installed on the circumferential surface of the rotating rod 7, the rotating shaft 9 is rotatably installed on the circumferential surface of the connecting pipe 8, the fan blade 10 is fixedly installed on the circumferential surface of the rotating shaft 9, and the sleeve 15 is fixedly installed on the convex plate 11, the receiving block 12, the connecting plate 13 At the top of the inner wall of the preparation frame 1, the convex plate 11 is fixedly installed on the bottom of the sleeve 15, the receiving block 12 is fixedly installed on the top of the connecting pipe 8, a slide groove 801 is opened inside the connecting pipe 8, the connecting plate 13 is slidably installed inside the slide groove 801, the circular plate 16 is rotatably installed on the circumferential surface of the sleeve 15, the arc block 17 is fixedly installed above the fan blade 10, the receiving plate 18 is rotatably installed inside the arc block 17, and the arc plate 19 is fixedly installed below the circular plate 16. The connecting pipe 8 moves upward to drive the receiving block 12 to move upward. The connecting pipe 8 is moved up and down by repeated contact and extrusion between the convex plate 11 and the receiving block 12. The connecting pipe 8 moves up and down, driving the rotating shaft 9 and the fan blade 10 to move up and down, so that the fan blade 10 moves up and down while rotating, thereby preventing stratification inside the nitric acid and causing incomplete distillation.

[0031] One end of the convex plate 11 away from the sleeve 15 is set as an arc surface 1, and one end of the receiving plate 18 away from the arc block 17 is rotatably connected to the inside of the arc plate 19. The upper part of the receiving block 12 is set as a beveled surface. The connecting plate 13 is fixedly connected to the rotating rod 7. The receiving block 12 rotates to contact and squeeze the convex plate 11, so that the receiving block 12 moves downward, and the receiving plate 18 rotates to drive the arc plate 19 to rotate.

[0032] A telescopic elastic rod 14 is fixedly installed above the connecting plate 13, and the free end of the telescopic elastic rod 14 is fixedly connected to the bottom of the connecting tube 8. The connecting tube 8 moves downward to contact and squeeze the telescopic end of the telescopic elastic rod 14 to shrink, and then the telescopic elastic rod 14 is reset to drive the connecting tube 8 to move upward, and the connecting tube 8 moves upward to drive the receiving block 12 to move upward.

[0033] A distillation method for a distillation device for nitric acid purification comprises the following steps: Step 1: start the motor 2, the output end of the motor 2 rotates to drive the rotating rod 7 and the connecting pipe 8 to rotate, and the connecting pipe 8 rotates to drive the rotating shaft 9 to rotate; Step 2: The rotating shaft 9 rotates to drive the fan blades 10 to rotate, and at the same time, the connecting tube 8 rotates to drive the receiving block 12 to rotate, contact and squeeze the convex plate 11, so that the receiving block 12 moves downward; Step 3: The receiving block 12 moves downward to drive the connecting tube 8 to move downward to contact and squeeze the telescopic end of the telescopic elastic rod 14 to shrink, and then the telescopic elastic rod 14 is reset to drive the connecting tube 8 to move upward; Step 4: The pipe 8 moves up and down to drive the rotating shaft 9 and the fan blades 10 to move up and down, so that the fan blades 10 move up and down while rotating to prevent stratification inside the nitric acid.

[0034] When the present embodiment is working, the motor 2 is started, the output end of the motor 2 rotates to drive the rotating rod 7 to rotate, the rotating rod 7 rotates to drive the connecting tube 8 to rotate, the connecting tube 8 rotates to drive the rotating shaft 9 to rotate, the rotating shaft 9 rotates to drive the fan blades 10 to rotate, the connecting tube 8 rotates to drive the receiving block 12 to rotate, the receiving block 12 rotates to contact and squeeze the convex plate 11, so that the receiving block 12 moves downward, the receiving block 12 moves downward to drive the connecting tube 8 to move, the connecting tube 8 moves downward to contact and squeeze the telescopic end of the telescopic elastic rod 14 to shrink, and then the telescopic elastic rod 14 is reset to drive the connecting tube 8 to move upward, the connecting tube 8 moves upward to drive the receiving block 12 to move upward, and the convex plate 11 and the connecting tube 8 are connected. The repeated contact and extrusion of the receiving block 12 realizes the up and down movement of the connecting tube 8. The up and down movement of the connecting tube 8 drives the rotating shaft 9 and the fan blades 10 to move up and down, so that the fan blades 10 move up and down while rotating, thereby preventing stratification inside the nitric acid, which leads to incomplete distillation. At the same time, the rotation of the fan blades 10 drives the arc block 17 to rotate, the rotation of the arc block 17 drives the receiving plate 18 to rotate, the rotation of the receiving plate 18 drives the arc plate 19 to rotate, and the rotation of the arc plate 19 drives the circular plate 16 to rotate. By realizing that the fan blades 10 can rotate while the connecting tube 8 moves up and down, the area for stirring the nitric acid is increased, the stirring efficiency is accelerated, and the speed of distilling nitric acid is increased.

[0035] See also Figure 1-Figure 9 One embodiment of the present invention further includes a cleaning device and a water spraying device, wherein the cleaning device includes a scraper 201, a long plate 202, a slider 204, a baffle 206 and a bevel block 207, wherein the scraper 201 is fixedly mounted on the circumferential surface of the rotating rod 7, the long plate 202 is slidably mounted on the inner wall of the equipment frame 1, a second slide groove 203 is provided on the surface of the long plate 202, the slider 204 is slidably mounted inside the second slide groove 203, a discharge port 102 is provided inside the equipment frame 1, the baffle 206 is hinged on the inner wall of the discharge port 102, the bevel block 207 is slidably mounted above the baffle 206, the slider 204 revolves to drive the long plate 202 to revolve, and the long plate 202 revolves, thereby realizing the cleaning of the bottom and inner wall of the equipment frame 1, preventing the inner wall of the equipment from generating crystals or impurities during the distillation process, resulting in the nitric acid solution being heated unevenly, thereby affecting the distillation effect.

[0036] The side of the slider 204 close to the scraper 201 is set as arc surface 2, and the side of the bevel block 207 away from the equipment frame 1 is set as arc surface 3. The scraper 201 is in contact with the long plate 202, and the bevel block 207 is slidably connected to the bottom of the equipment frame 1. A clockwork spring is arranged between the baffle 206 and the bevel block 207. The movement of the bevel block 207 releases the limit on the baffle 206. After the limit is released, the baffle 206 rotates to open the discharge port 102, and the equipment can be inspected and repaired. At the same time, it can prevent the baffle 206 from being opened from the outside due to accidental touch, thereby causing safety hazards during the distillation process, and effectively reducing subsequent maintenance costs.

[0037] A telescopic elastic rod 205 is fixedly installed inside the second slide groove 203. The free end of the telescopic elastic rod 205 is fixedly connected to the top of the slider 204. The rotation of the connecting pipe 8 drives the scraper 201 to rotate. When the scraper 201 rotates forward and contacts the extrusion slider 204 to move upward, the slider 204 contacts and squeezes the telescopic end of the telescopic elastic rod 205, which contracts and then resets.

[0038] The water spraying device includes a water tank 211, a rotating frame 212, a water gun 213, a moving block 214, a protrusion 215, a touch plate 216 and a fixed plate 217. The water tank 211 is fixedly installed on the top of the inner wall of the equipment frame 1, the rotating frame 212 is rotatably installed below the water tank 211, the water gun 213 is fixedly penetrated through the inner and outer walls of the water tank 211, the moving block 214 is slidably installed inside the rotating frame 212, the protrusion 215 is slidably penetrated through the inner and outer walls of the rotating frame 212, the touch plate 216 is fixedly installed on the side of the moving block 214 away from the protrusion 215, and the fixed plate 217 is fixedly installed above the rotating frame 212. At the same time, the water outlet 219 and the water gun 213 overlap, so that the water flow inside the water tank 211 is discharged through the water gun 213, which can flush the inner wall of the equipment frame 1, help loosen and flush the residue inside the equipment, make it easier to remove, ensure that the equipment is thoroughly cleaned, and maintain the normal operation of the equipment.

[0039] The side of the moving block 214 close to the protrusion 215 is set as arc surface four, and the side of the protrusion 215 away from the moving block 214 is set as arc surface five. A spring 218 is set between the fixed plate 217 and the moving block 214. The spring 218 is reset after contraction and reset under the action of the water gun 213, and blocks the water gun 213, thereby realizing intermittent water spraying of the water gun 213. Intermittent water spraying can effectively save water resources to rinse the surface of the equipment or flush residues, reduce continuous impact and wear on the inside of the equipment, and clean more gently to extend the service life of the equipment.

[0040] When the present embodiment is working, when it is necessary to overhaul the equipment, the motor 2 is reversed, and when the connecting pipe 8 rotates, the scraper 201 is driven to rotate, and the scraper 201 rotates to contact the side of the slider 204 that is not the arc surface, and drives the slider 204 to rotate and revolve around the rotating rod 7. The revolution of the slider 204 drives the long plate 202 to revolve, and the long plate 202 revolves, so as to realize the cleaning of the bottom and inner wall of the equipment frame 1, and prevent the inner wall of the equipment from generating crystals or impurities during the distillation process, resulting in uneven heating of the nitric acid solution, thereby affecting the distillation effect. When the long plate 202 The arc surface of the bevel block 207 is contacted and squeezed by rotating counterclockwise, and the bevel block 207 is moved to the side close to the baffle 206. The movement of the bevel block 207 releases the limit on the baffle 206. After the limit is released, the baffle 206 rotates to open the discharge port 102. Through the spring between the baffle 206 and the bevel block 207, the baffle 206 can be reset when it rotates upward, which is convenient for the maintenance of the equipment and prevents the baffle 206 from being opened from the outside due to accidental touch, thereby causing safety hazards during the distillation process, effectively reducing subsequent maintenance costs.

[0041] When the long board 202 rotates to contact and squeeze the protrusion 215 to rotate, the rotation of the protrusion 215 drives the rotating frame 212 to rotate, the rotation of the rotating frame 212 drives the moving block 214 to rotate, the movement of the moving block 214 drives the touch plate 216 to rotate, the touch plate 216 rotates to contact the water gun 213 and moves in the direction close to the fixed plate 217 under its action, the touch plate 216 rotates to drive the moving plate 214 to move and release the limit on the protrusion 215, after the limit is released, the long board 202 continues to rotate to squeeze the protrusion 215 to shrink, and at the same time the water outlet 219 and the water gun 213 overlap, so that the water flow inside the water tank 211 is discharged through the water gun 213, which can be used to clean the inner wall of the equipment frame 1 Flushing helps to loosen and flush the residue inside the equipment, making it easier to remove, ensuring that the equipment is thoroughly cleaned and maintaining the normal operation of the equipment. When the moving block 214 moves toward the fixed plate 217, the squeezing spring 218 contracts. When the long plate 202 is out of contact with the protrusion 215, the spring 218 contracts and resets under the action of the water gun 213, and blocks the water gun 213, thereby achieving intermittent water spraying by the water gun 213. Intermittent water spraying can effectively save water resources to flush the surface of the equipment or flush residues, reduce continuous impact and wear on the inside of the equipment, and clean more gently to extend the service life of the equipment.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distillation device for purifying nitric acid, comprising a device frame (1) and a condensation frame (6), wherein a motor (2) is fixedly mounted on the top of the device frame (1), an exhaust pipe (3) is fixedly penetrated through the circumferential surface of the device frame (1), a feed pipe (4) is fixedly penetrated through the inner and outer walls of the device frame (1), and a water outlet pipe (5) is fixedly penetrated through the circumferential surface of the condensation frame (6), characterized in that: It also includes a stirring device, a cleaning device and a water spraying device; The stirring device comprises a rotating rod (7), a connecting pipe (8), a rotating shaft (9), a fan blade (10), a sleeve (15), a convex plate (11), a receiving block (12), a connecting plate (13), a circular plate (16), an arc block (17), a receiving plate (18) and an arc plate (19), wherein the rotating rod (7) is fixedly mounted on the output end of the motor (2), the connecting pipe (8) is slidably mounted on the circumferential surface of the rotating rod (7), the rotating shaft (9) is rotatably mounted on the circumferential surface of the connecting pipe (8), the fan blade (10) is fixedly mounted on the circumferential surface of the rotating shaft (9), and the sleeve (15) is fixedly mounted on the circumferential surface of the rotating shaft (9). The top of the inner wall of the equipment frame (1), the convex plate (11) is fixedly mounted on the bottom of the sleeve (15), the receiving block (12) is fixedly mounted on the top of the connecting tube (8), a slide groove (801) is provided inside the connecting tube (8), the connecting plate (13) is slidably mounted inside the slide groove (801), the circular plate (16) is rotatably mounted on the circumferential surface of the sleeve (15), the arc block (17) is fixedly mounted above the fan blade (10), the receiving plate (18) is rotatably mounted inside the arc block (17), and the arc plate (19) is fixedly mounted below the circular plate (16).

2. A distillation device for nitric acid purification according to claim 1, characterized in that: One end of the convex plate (11) away from the sleeve (15) is configured as an arc surface 1, one end of the receiving plate (18) away from the arc block (17) is rotatably connected to the inside of the arc plate (19), the upper portion of the receiving block (12) is configured as an oblique cut surface, and the connecting plate (13) is fixedly connected to the rotating rod (7).

3. A distillation device for nitric acid purification according to claim 2, characterized in that: A telescopic elastic rod (14) is fixedly mounted above the connecting plate (13), and a free end of the telescopic elastic rod (14) is fixedly connected to the bottom of the connecting pipe (8).

4. A distillation device for nitric acid purification according to claim 3, characterized in that: The cleaning device comprises a scraper (201), a long plate (202), a slider (204), a baffle (206) and a bevel block (207); the scraper (201) is fixedly mounted on the circumferential surface of the rotating rod (7); the long plate (202) is slidably mounted on the inner wall of the equipment frame (1); a second slide groove (203) is provided on the surface of the long plate (202); the slider (204) is slidably mounted inside the second slide groove (203); a discharge port (102) is provided inside the equipment frame (1); the baffle (206) is hinged to the inner wall of the discharge port (102); and the bevel block (207) is slidably mounted above the baffle (206).

5. A distillation device for nitric acid purification according to claim 4, characterized in that: The side of the slider (204) close to the scraper (201) is configured as arc surface 2, the side of the bevel block (207) away from the device frame (1) is configured as arc surface 3, the scraper (201) is in contact with the long plate (202), the lower part of the bevel block (207) is slidably connected to the bottom of the device frame (1), and a spring is provided between the baffle (206) and the bevel block (207).

6. A distillation device for nitric acid purification according to claim 5, characterized in that: A second telescopic elastic rod (205) is fixedly installed inside the second slide groove (203), and the free end of the second telescopic elastic rod (205) is fixedly connected to the upper part of the sliding block (204).

7. A distillation device for nitric acid purification according to claim 6, characterized in that: The water spraying device comprises a water tank (211), a rotating frame (212), a water gun (213), a moving block (214), a protrusion (215), a touch plate (216) and a fixed plate (217); the water tank (211) is fixedly mounted on the top of the inner wall of the equipment frame (1); the rotating frame (212) is rotatably mounted below the water tank (211); the water gun (213) is fixedly mounted through the inner and outer walls of the water tank (211); the moving block (214) is slidably mounted inside the rotating frame (212); the protrusion (215) is slidably mounted through the inner and outer walls of the rotating frame (212); the touch plate (216) is fixedly mounted on a side of the moving block (214) away from the protrusion (215); and the fixed plate (217) is fixedly mounted above the rotating frame (212).

8. A distillation device for nitric acid purification according to claim 7, characterized in that: A side of the moving block (214) close to the protrusion (215) is configured as an arc surface four, a side of the protrusion (215) away from the moving block (214) is configured as an arc surface five, a spring one (218) is provided between the fixing plate (217) and the moving block (214), and a water outlet (219) is provided on the surface of the rotating frame (212).

9. A distillation method of a distillation device for nitric acid purification, using the distillation device for nitric acid purification according to claim 8, characterized in that: The following steps are involved: Step 1: starting the motor (2), the output end of the motor (2) rotates to drive the rotating rod (7) and the connecting pipe (8), and the connecting pipe (8) rotates to drive the rotating shaft (9); Step 2: The rotating shaft (9) rotates to drive the fan blades (10) to rotate, and at the same time, the connecting tube (8) rotates to drive the receiving block (12) to rotate, contact and squeeze the convex plate (11), so that the receiving block (12) moves downward; Step 3: The receiving block (12) moves downward, driving the connecting tube (8) to move downward, contacting and squeezing the telescopic end of the telescopic elastic rod (14) to contract, and then the telescopic elastic rod (14) is reset, driving the connecting tube (8) to move upward; Step 4: The pipe (8) moves up and down to drive the rotating shaft (9) and the fan blades (10) to move up and down, so that the fan blades (10) move up and down while rotating, thereby preventing stratification inside the nitric acid.

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