Crystallization equipment based on hydroxylamine hydrochloride mother liquor design

Abstract

This invention belongs to the field of crystallizer technology, specifically a crystallization device designed based on hydroxylamine hydrochloride mother liquor, including a crystallizer body; a stirring rod rotatably connected to the top of the shell; a buffer cylinder fixedly connected to the lower end of the shell; a rectangular cross-section of the inner cavity of the discharge joint; a valve plug slidably connected inside the discharge joint; and pressure relief components on both sides of the buffer cylinder, which are used to release the solution inside the buffer cylinder. This invention mainly addresses the problem that during liquid crystallization, and during the downward movement of the crystallizer by the spiral plate, the solution crystallizes on the mesh, and the crystallization blocks the mesh of the spiral plate. This results in a larger reaction force on the spiral plate when it pushes the solution downward, causing the pressure sensor to receive a false signal, thus prematurely discharging the solution.

Description

Technical Field

[0001] This invention belongs to the field of crystallizer technology, specifically a crystallization device designed based on hydroxylamine hydrochloride mother liquor. Background Technology

[0002] A crystallizer is a commonly used chemical equipment, mainly used to precipitate the formed products from the solution. Existing crystallizers have the following shortcomings during operation: First, the discharge valve opens periodically after a certain period of operation to discharge the product. However, due to various factors during cyclical operation, the amount of product crystallized within the same time period can vary. If the amount of crystallized product is insufficient, opening the discharge valve too frequently will affect work efficiency. If the amount of crystallized product is excessive, the crystallizer will remain in a crystallizing state even after exceeding a certain amount, which can easily affect subsequent crystallization processes and also cause some crystals to become too large, affecting subsequent processes such as washing, drying, and grinding.

[0003] Secondly, the mixing effect of the circulating liquid is not good. The temperature difference between the solution re-entering the interior from the circulation joint and the solution in the original crystallizer affects the crystallization effect and can also easily cause uneven crystal particles, affecting product quality.

[0004] Therefore, we have filed an invention patent with publication number CN116392846B, entitled "A Crystallizer for the Production of Hydroxylamine Hydrochloride". The patent uses a spiral plate with a filter mesh and a buffer cylinder to work together. The spiral plate can quickly transport the precipitated crystals into the buffer cylinder and then discharge them intermittently.

[0005] Subsequent work revealed that, because the spiral plate is a filter mesh, the reaction force generated by the liquid on the spiral plate when it rotates is insufficient to push the filter mesh spiral plate upward. However, during the liquid crystallization process, and during the process of the spiral plate pushing the crystals downward, the solution crystallizes on the mesh, and the crystals block the mesh of the spiral plate. This causes the reaction force on the spiral plate to increase when it pushes the solution downward, resulting in the pressure sensor receiving false signals and prematurely discharging the material. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a crystallization device based on hydroxylamine hydrochloride mother liquor. This invention incorporates a pressure relief component that discharges the solution entering the buffer cylinder. The discharged solution re-enters the shell and mixes with the solution already there. This process prevents excessive reaction force exerted by the solution in the buffer cylinder on the spiral plate, which could cause the spiral plate to move upwards by a greater distance, leading to the opening of the discharge connector and premature discharge. This solves the problems mentioned in the background section. The specific structure is as follows:

[0007] A crystallization device based on hydroxylamine hydrochloride mother liquor includes a crystallizer body; the crystallizer body includes a shell; the upper end of the shell is provided with a steam exhaust port; the middle of the shell is provided with a liquid inlet port; the bottom of the shell is provided with a liquid drain port; and the interior of the shell is provided with a skirt-type baffle and a flow guide tube.

[0008] A drive assembly is installed on the top of the housing; a stirring rod is rotatably connected to the top of the housing, and the drive assembly is used to drive the stirring rod; a drive rod is provided on the top of the housing, and the drive rod is sleeved on the stirring rod and extends to the top of the guide tube; the drive rod is fixedly connected to the guide tube through evenly arranged connecting rods.

[0009] Auxiliary plates are uniformly arranged and fixed to the outer ring surface of the guide tube; a buffer tube is fixed to the lower end of the shell, and the top of the buffer tube is connected to the shell; a discharge connector is installed below the buffer tube.

[0010] A rectangular groove is provided at the bottom of the stirring rod; a rectangular rod is slidably connected in the rectangular groove, and part of the rectangular rod slides out of the stirring rod; a rotating shaft is fixedly connected below the rectangular rod, and the rotating shaft extends into the buffer cylinder; a spiral plate is fixedly connected to the rotating shaft.

[0011] The inner cavity of the discharge connector has a rectangular cross-section; a valve plug is slidably connected inside the discharge connector, and the valve plug is also rectangular; a discharge pipe is fixedly connected to the discharge connector below the valve plug; a long cylinder is fixedly connected inside the valve plug, and the long cylinder extends above the valve plug; the inner surface of the long cylinder is threaded; and rings are fixedly connected to the top and bottom of the long cylinder.

[0012] The long cylinder is equipped with a long rod, and there is a gap between the long rod and the inner cavity of the long cylinder; a disc is fixedly connected to the bottom of the long rod, and the outer surface of the disc is threaded; the disc is initially located inside the bottom ring, and the height of the disc is the same as the height of the ring.

[0013] Both the rotating shaft and the rectangular rod have round holes, and the long rods pass through the round holes in the rotating shaft and the rectangular rod and extend into the rectangular groove; the side of the long rod extending into the rectangular groove is rotatably connected to the stirring rod through a bearing.

[0014] Two fixed rods are fixedly connected to the top of the rectangular rod; a first drive ring is fixedly connected to the two fixed rods, and a long rod passes through the first drive ring; a first pawl is rotatably connected to the lower surface of the first drive ring; a second pawl is rotatably connected to the upper surface of the first drive ring.

[0015] A second drive ring is fixedly connected to the long rod below the first drive ring; the upper surface of the second drive ring is provided with uniformly arranged first ratchet grooves. When the first pawl contacts the first ratchet groove, and when the first drive ring drives the first pawl below to rotate counterclockwise, the first pawl itself will rotate and will not engage with the first ratchet groove. When the first pawl rotates clockwise, the first pawl will engage with the first ratchet groove and drive the second drive ring to rotate.

[0016] A third drive ring is fixedly connected above the first drive ring at the top of the long rod; the lower surface of the third drive ring is provided with evenly arranged second ratchet grooves. When the second pawl contacts the second ratchet groove, and when the first drive ring drives the first pawl above to rotate counterclockwise, the second pawl will mesh with the second ratchet groove and drive the third drive ring to rotate.

[0017] Both sides of the buffer cylinder are equipped with pressure relief components, which are used to release the solution inside the buffer cylinder.

[0018] Preferably, the pressure relief assembly includes a short pipe; two short pipes are installed on each of the left and right sides of the buffer cylinder; two through holes are opened on each of the left and right sides of the buffer cylinder, and the short pipes are connected to the corresponding through holes; a filter plate is fixedly connected in each of the through holes;

[0019] The two short tubes located on the same side are connected by a conduit; an extension tube is fixedly connected to the lower short tube located on the same side, and the extension tube extends into the housing; an auger is rotatably connected to both extension tubes, and the auger is driven by a drive motor; a sliding cylinder is fixedly connected to the bottom of the spiral plate, and in the initial state the bottom of the sliding cylinder is located below the through hole below.

[0020] Each of the short tubes is fixedly connected to a mounting block; each mounting block is slidably connected to a sliding rod;

[0021] Each of the slide rods is fixed to a star-shaped plate at the other end, and a spring is fixed between the star-shaped plate and the mounting block; each of the star-shaped plates is fixed to a uniformly arranged insert rod on the side facing the filter plate, and the insert rod is tapered, and the insert rod initially rests against the slide cylinder; the bottom of the slide cylinder is rounded.

[0022] Each of the aforementioned inserts is fixedly connected to a ball;

[0023] The cross-shaped plates inside the two short tubes located on the same side are connected by a connecting plate;

[0024] The bottom of the slide is fixedly connected to a uniformly arranged arc-shaped plate;

[0025] The cross-section of the arc-shaped plate is semi-circular.

[0026] Preferably, a magnet is fixedly connected inside the valve plug; the disk is made of metal material and is initially attracted to the magnet.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. The crystallization device based on hydroxylamine hydrochloride mother liquor of the present invention, due to the presence of the pressure relief component, can discharge the solution entering the buffer cylinder. The solution discharged by the pressure relief component will re-enter the shell and mix with the solution in the shell again. In this process, it can avoid the excessive reaction force generated by the solution in the buffer cylinder on the spiral plate, which would cause the spiral plate to move upward a greater distance, thereby causing the discharge joint to open and resulting in premature discharge.

[0029] 2. In the crystallization device based on hydroxylamine hydrochloride mother liquor of the present invention, as the reaction force of the solution on the spiral plate increases, the upward distance of the slide cylinder increases, thereby increasing the range of the through hole opening. During this process, the opening size of the through hole can be automatically controlled according to the upward distance of the slide cylinder driven by the reaction force on the spiral plate, thereby preventing the solution entering the buffer cylinder from being unequal to the opening size of the through hole, which would cause some of the solution that cannot be discharged to generate a reaction force on the spiral plate.

[0030] 3. The crystallization device based on hydroxylamine hydrochloride mother liquor of the present invention has two through holes on both sides of the buffer cylinder. As the crystals in the buffer cylinder gradually accumulate, the spiral plate gradually moves upward, which in turn drives the slide cylinder to move upward. When the bottom of the slide cylinder moves to the position of the upper through hole, the upper through hole will be opened. Therefore, the liquid entering the buffer cylinder will be discharged from the two through holes on both sides of the buffer cylinder and flow into the extension pipe. In this process, it can prevent the accumulated crystals from blocking the lower through hole, thereby reducing the drainage effect of the lower through hole. Moreover, the upper through hole can relieve the drainage pressure of the lower through hole. While the upper and lower through holes drain liquid together, it can prevent the situation of untimely drainage. Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the crystallizer of the present invention;

[0033] Figure 2 This is a structural diagram of the crystallizer of the present invention;

[0034] Figure 3 This is a schematic diagram showing the cooperation between the buffer cylinder and the pressure relief component in this invention;

[0035] Figure 4 This is the present invention. Figure 3 Enlarged view of a portion of point A in the middle;

[0036] Figure 5 This is the present invention. Figure 3 Enlarged view of a section at point B in the middle;

[0037] Figure 6 This is a structural diagram of the buffer cylinder in this invention;

[0038] Figure 7 This is a structural diagram of the pressure relief assembly in this invention;

[0039] Figure 8 This is a cross-sectional view of the crystallizer of the present invention;

[0040] Figure 9 This is a cross-sectional view of the buffer cylinder and pressure relief assembly in this invention;

[0041] Figure 10 This is the present invention. Figure 9 Enlarged view of a section at point C;

[0042] Figure 11 This is the present invention. Figure 9 Enlarged view of a section at point D;

[0043] Figure 12 This is the present invention. Figure 9 Enlarged view of a section at point E in the middle;

[0044] Figure 13 This is the present invention. Figure 9 Enlarged view of a section at point F in the middle;

[0045] Figure 14 This is the present invention. Figure 9 Enlarged view of a section at point G.

[0046] In the diagram: 1. Shell; 11. Steam exhaust connector; 12. Liquid inlet connector; 13. Liquid outlet connector; 2. Stirring rod; 21. Rectangular groove; 22. Rectangular rod; 23. Rotating shaft; 24. Spiral plate; 25. Fixing rod; 26. First drive ring; 27. First pawl; 28. Second pawl; 3. Buffer cylinder; 31. Discharge connector; 32. Valve plug; 33. Discharge pipe; 34. Long cylinder; 35. Circular ring; 36. Magnet; 4. Long rod; 41. Disc; 42. Second drive ring; 43. First ratchet groove; 44. Third drive ring; 45. Second ratchet groove; 5. Short pipe; 51. Through hole; 52. Filter plate; 53. Extension pipe; 54. Screwdriver; 55. Slide cylinder; 6. Mounting block; 61. Slide rod; 62. Cross-shaped plate; 63. Insert rod; 64. Connecting plate; 65. Arc plate. Detailed Implementation

[0047] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0048] like Figures 1 to 14 As shown,

[0049] Example 1:

[0050] The crystallization device based on hydroxylamine hydrochloride mother liquor of the present invention includes a crystallizer body; the crystallizer body includes a shell 1; the upper end of the shell 1 is provided with a steam exhaust connector 11; the middle part of the shell 1 is provided with a liquid inlet connector 12; the bottom of the shell 1 is provided with a liquid drain connector 13; the shell 1 is provided with a skirt baffle and a flow guide tube inside;

[0051] A drive assembly is installed on the top of the housing 1; a stirring rod 2 is rotatably connected to the top of the housing 1, and the drive assembly is used to drive the stirring rod 2; a drive rod is provided on the top of the housing 1, and the drive rod is sleeved on the stirring rod 2 and extends to the top of the guide tube; the drive rod is fixedly connected to the guide tube through evenly arranged connecting rods.

[0052] Auxiliary plates are uniformly arranged and fixed to the outer ring surface of the guide tube; a buffer cylinder 3 is fixed to the lower end of the shell 1, and the top of the buffer cylinder 3 is connected to the shell 1; a discharge connector 31 is installed below the buffer cylinder 3.

[0053] A rectangular groove 21 is provided at the bottom of the stirring rod 2; a rectangular rod 22 is slidably connected in the rectangular groove 21, and part of the rectangular rod 22 slides out of the stirring rod 2; a rotating shaft 23 is fixedly connected below the rectangular rod 22, and the rotating shaft 23 extends into the buffer cylinder 3; a spiral plate 24 is fixedly connected to the rotating shaft 23.

[0054] The inner cavity of the discharge connector 31 has a rectangular cross-section; a valve plug 32 is slidably connected inside the discharge connector 31, and the valve plug 32 is also rectangular; a discharge pipe 33 is fixedly connected to the discharge connector 31 below the valve plug 32; a long cylinder 34 is fixedly connected inside the valve plug 32, and the long cylinder 34 extends above the valve plug 32; the inner surface of the long cylinder 34 is threaded; and rings 35 are fixedly connected to both the top and bottom of the long cylinder 34.

[0055] The long cylinder 34 is provided with a long rod 4, and there is a gap between the long rod 4 and the inner cavity of the long cylinder 34; the bottom of the long rod 4 is fixedly connected to a disk 41, and the outer surface of the disk 41 is threaded; the disk 41 is initially located inside the bottom ring 35, and the height of the disk 41 is the same as the height of the ring 35.

[0056] Both the rotating shaft 23 and the rectangular rod 22 have round holes, and the long rod 4 passes through the round holes in the rotating shaft 23 and the rectangular rod 22 and extends into the rectangular groove 21; the side of the long rod 4 extending into the rectangular groove 21 is rotatably connected to the stirring rod 2 by a bearing.

[0057] Two fixed rods 25 are fixedly connected to the top of the rectangular rod 22; a first drive ring 26 is fixedly connected to the two fixed rods 25, and the long rod 4 passes through the first drive ring 26; a first pawl 27 is rotatably connected to the lower surface of the first drive ring 26; a second pawl 28 is rotatably connected to the upper surface of the first drive ring 26.

[0058] A second drive ring 42 is fixedly connected to the long rod 4 below the first drive ring 26; the upper surface of the second drive ring 42 is provided with uniformly arranged first ratchet grooves 43. When the first pawl 27 contacts the first ratchet groove 43, and when the first drive ring 26 drives the first pawl 27 below to rotate counterclockwise, the first pawl 27 will rotate itself and will not engage with the first ratchet groove 43. When the first pawl 27 rotates clockwise, the first pawl 27 will engage with the first ratchet groove 43 and drive the second drive ring 42 to rotate.

[0059] A third drive ring 44 is fixedly connected above the first drive ring 26 at the top of the long rod 4; the lower surface of the third drive ring 44 is provided with evenly arranged second ratchet grooves 45. When the second pawl 28 contacts the second ratchet groove 45, and when the first drive ring 26 drives the first pawl 27 above to rotate counterclockwise, the second pawl 28 will mesh with the second ratchet groove 45 and drive the third drive ring 44 to rotate.

[0060] Both sides of the buffer cylinder 3 are equipped with pressure relief components, which are used to release the solution inside the buffer cylinder 3;

[0061] In actual operation, the solution is first introduced into the housing 1 through the inlet connector 12. The solution entering the housing 1 will mix with the solution inside the housing 1, and the drive component will drive the stirring rod 2 and the drive rod to rotate counterclockwise, thereby driving the guide tube and the auxiliary plate to stir and mix the solution in the housing 1, so that the solution in the housing 1 gradually precipitates crystals. Since the rectangular rod 22 slides in the rectangular groove 21 of the stirring rod 2, the stirring rod 2 will drive the rectangular rod 22 to rotate, and the rectangular rod 22 will drive the rotating shaft 23 and the spiral plate 24 on the rotating shaft 23 to rotate. During the rotation of the spiral plate 24, the spiral plate 24 will gradually transport the crystals to the buffer cylinder 3 for storage. When the crystals stored in the buffer cylinder 3 reach the discharge standard, the material is discharged.

[0062] Specifically, when the spiral plate 24 rotates, it not only transfers the crystals into the buffer cylinder 3, but also pushes the solution into the buffer cylinder 3. When the solution enters the buffer cylinder 3, it will generate a certain reaction force on the spiral plate 24. When the spiral plate 24 moves upward due to the reaction force, it will drive the rotating shaft 23 and the rectangular rod 22 to move upward. During the upward movement of the rectangular rod 22, the rectangular rod 22 will move upward a distance within the rectangular groove 21. At the same time, when the spiral plate 24 moves upward, due to the presence of the pressure relief component, the pressure relief component can discharge the solution entering the buffer cylinder 3. The solution discharged by the pressure relief component will re-enter the shell 1 and mix with the solution in the shell 1 again. In this process, it can avoid the situation where the reaction force generated by the solution in the buffer cylinder 3 on the spiral plate 24 is too large, which would cause the spiral plate 24 to move upward a greater distance, thereby causing the discharge joint 31 to open and resulting in premature discharge.

[0063] More specifically, during the counterclockwise rotation of the spiral plate 24 following the stirring rod 2, since the long rod 4 passes through the circular holes opened in the rotating shaft 23 and the rectangular rod 22 and extends into the rectangular groove 21, and is rotatably connected to the stirring rod 2 through the bearing, the long rod 4 will not be driven to rotate during the rotation of the stirring rod 2, and the disc 41 fixed to the bottom of the long rod 4 is located in the ring 35 at the bottom of the long cylinder 34. At the same time, when the rectangular rod 22 rotates counterclockwise following the stirring rod 2, the rectangular rod 22 will drive the fixed rod 25 and the first drive ring 26 fixed to the fixed rod 25 to rotate counterclockwise. During the rotation of the first drive ring 26, the first pawl 27 below and the second pawl 28 above will rotate. When the first pawl 27 rotates counterclockwise and passes through the first ratchet groove 43 on the second drive ring 42, the first pawl 27 itself will rotate and will not mesh with the first ratchet groove 43.

[0064] Furthermore, as the spiral plate 24 gradually transfers the crystals into the buffer cylinder 3, when the spiral plate 24 contacts the crystals, the crystals exert a reaction force on the spiral plate 24, thereby pushing the spiral plate 24 to gradually move upward. The rectangular rod 22 will gradually move upward within the rectangular groove 21, simultaneously driving the fixed rod 25 and the first drive ring 26 to gradually move upward. As the amount of crystals in the buffer cylinder 3 gradually increases, the upward distance of the spiral plate 24 gradually increases. At the same time, the rectangular rod 22 pushes the second pawl 28 on the first drive ring 26 to gradually approach the third drive ring 44. When the second pawl 28 contacts the second ratchet groove 45 on the third drive ring 44, the counterclockwise rotating second pawl 28 will push the third drive ring 44 to rotate counterclockwise. During the rotation of ring 44, it will drive the long rod 4 and the disc 41 at the bottom of the long rod 4 to rotate. When the disc 41 rotates counterclockwise, the thread on the disc 41 will engage with the thread inside the long cylinder 34. Since the inner cavity of the valve plug 32 and the discharge connector 31 are both rectangular, the valve plug 32 will not rotate with the disc 41. Therefore, the rotating disc 41 will push the long cylinder 34 to gradually move down, and the long cylinder 34 will drive the valve plug 32 to gradually move down inside the discharge connector 31. When the valve plug 32 moves down to the bottom position of the discharge connector 31, the disc 41 will rotate into the ring 35 above the long cylinder 34 and disengage from the thread inside the long cylinder 34. Therefore, when the disc 41 rotates, it will not continue to push the long cylinder 34 down, and then the material can be discharged.

[0065] Furthermore, as the crystals in the buffer cylinder 3 are gradually discharged, the spiral plate 24 will gradually move downwards, simultaneously causing the rotating shaft 23, the rectangular rod 22, and the first drive ring 26 fixed to the rectangular rod 22 by the fixing rod 25 to gradually move downwards. After the first drive ring 26 moves downwards, the second pawl 28 will disengage from the second ratchet groove 45 on the third drive ring 44, thus preventing it from continuing to drive the long rod 4 to rotate. After the crystals in the buffer cylinder 3 are discharged, the first pawl 27 at the bottom of the first drive ring 26 will contact the first ratchet groove 43 on the second drive ring 42, subsequently controlling the stirring rod 2 to reverse, and driving the rectangular rod 22... The first drive ring 26 and the first pawl 27 rotate clockwise. When the first pawl 27 rotates clockwise, it will drive the second drive ring 42 to rotate clockwise. The second drive ring 42 will drive the long rod 4 to rotate clockwise, and the long rod 4 will drive the disc 41 to rotate clockwise. When the disc 41 rotates clockwise, the disc 41 will engage with the thread inside the long cylinder 34 again, thereby driving the long cylinder 34 and the valve plug 32 to move upward. When the valve plug 32 moves upward to the initial position, the disc 41 is once again located in the ring 35 below the long cylinder 34. Then, the stirring rod 2 can be controlled to rotate counterclockwise to continue the crystallization process.

[0066] Example 2:

[0067] The pressure relief assembly includes a short pipe 5; two short pipes 5 are installed on both the left and right sides of the buffer cylinder 3; two through holes 51 are opened on both the left and right sides of the buffer cylinder 3, and the short pipes 5 are connected to the corresponding through holes 51; a filter plate 52 is fixedly connected in each of the through holes 51.

[0068] The two short pipes 5 located on the same side are connected by a conduit; an extension pipe 53 is fixedly connected to the lower short pipe 5 located on the same side, and the extension pipe 53 extends into the housing 1; an auger 54 is rotatably connected to both extension pipes 53, and the auger 54 is driven by a drive motor; a sliding cylinder 55 is fixedly connected to the bottom of the spiral plate 24, and in the initial state, the bottom of the sliding cylinder 55 is located below the through hole 51 below;

[0069] Each of the short tubes 5 is fixedly connected to a mounting block 6; each mounting block 6 is slidably connected to a sliding rod 61; the other end of each sliding rod 61 is fixedly connected to a star-shaped plate 62, and a spring is fixedly connected between the star-shaped plate 62 and the mounting block 6; each star-shaped plate 62 has a uniformly arranged insert rod 63 fixedly connected to one end face facing the filter plate 52, and the insert rod 63 is conical, and the insert rod 63 initially rests against the slide cylinder 55; the bottom of the slide cylinder 55 is rounded.

[0070] Each of the insert rods 63 is fixedly connected to a ball; the cross plates 62 in the two short tubes 5 located on the same side are connected by a connecting plate 64;

[0071] The bottom of the slide cylinder 55 is fixedly connected to an evenly arranged arc-shaped plate 65; the cross-section of the arc-shaped plate 65 is semi-circular.

[0072] When the spiral plate 24 pushes the solution into the buffer cylinder 3, and the spiral plate 24 is subjected to the reaction force of the solution, the spiral plate 24 moves upward. During the upward movement of the spiral plate 24, it will drive the slide cylinder 55 to move upward. As the slide cylinder 55 moves upward, the through hole 51 is gradually opened. After the through hole 51 is opened, the solution entering the buffer cylinder 3 will pass through the filter plate 52 in the through hole 51 and enter the short tube 5. The solution entering the short tube 5 will flow into the extension tube 53. When the drive motor rotates, it will drive the auger 54 in the extension tube 53 to rotate. The rotating auger 54 can... The solution that has entered the extension tube 53 is pushed back into the housing 1 and mixed with the solution in the housing 1. As the reaction force of the solution on the spiral plate 24 increases, the slide cylinder 55 moves upward a greater distance, thereby opening the through hole 51 to a greater extent. During this process, the opening size of the through hole 51 can be automatically controlled according to the reaction force on the spiral plate 24 and the distance the slide cylinder 55 moves upward, thereby preventing the solution entering the buffer cylinder 3 from being unequal to the opening size of the through hole 51, which would cause some of the solution that cannot be discharged to generate a reaction force on the spiral plate 24.

[0073] Since there are two through holes 51 on both sides of the buffer cylinder 3, as the crystals in the buffer cylinder 3 gradually accumulate, the spiral plate 24 gradually moves upward, which will drive the slide cylinder 55 to move upward. When the bottom of the slide cylinder 55 moves to the position of the upper through hole 51, the upper through hole 51 will be opened. Therefore, the liquid entering the buffer cylinder 3 will be discharged from the two through holes 51 on both sides of the buffer cylinder 3 and flow into the extension tube 53. In this process, the accumulated crystals can be prevented from blocking the lower through hole 51, thereby reducing the drainage effect of the lower through hole 51. The upper through hole 51 can relieve the drainage pressure of the lower through hole 51. While the upper and lower through holes 51 drain liquid together, the situation of untimely drainage can be avoided.

[0074] Furthermore, after the buffer cylinder 3 moves above the through hole 51, the sliding cylinder 55 no longer restricts the insertion rod 63. Under the action of the spring, the sliding rod 61 will slide towards the through hole 51. At the same time, the star-shaped plate 62 will drive the insertion rod 63 to move. Therefore, the insertion rod 63 will extend a certain distance from the through hole 51, thereby clearing the filter holes. When the sliding cylinder 55 drives the evenly arranged arc-shaped plate 65 to rotate, during the rotation of the arc-shaped plate 65, when the arc-shaped plate 65 passes through the through hole 51, it will squeeze the insertion rod 63. When the insertion rod 63 is squeezed... When pressed, the insert rod 63 pushes the star-shaped plate 62 to move towards the mounting block 6 and compresses the spring. After the arc plate 65 passes through the through hole 51, the star-shaped plate 62 returns to its initial state under the action of the spring, thereby driving the insert rod 63 to move back and forth in the filter holes of the filter plate 52. At the same time, it will drive the ball to move back and forth in the filter holes, thereby clearing the filter plate 52 and preventing the filter plate 52 from becoming blocked. Since the cross-section of the arc plate 65 is semi-circular, it can better push the insert rod 63 to move back and forth in the filter holes of the filter plate 52.

[0075] Furthermore, since the two cross plates 62 on the same side are connected by a connecting plate 64, when the rod 63 in one of the through holes 51 is squeezed and moved back and forth by the arc plate 65, it will drive the other cross plate 62 to move back and forth through the connecting plate 64, thereby clearing the filter plates 52 in the two through holes 51 and preventing the filter plates 52 from becoming blocked.

[0076] When the slide cylinder 55 moves down, due to the rounded corner design at the bottom of the slide cylinder 55, the rounded corner part at the bottom of the slide cylinder 55 will come into contact with the insertion rod 63. As the slide cylinder 55 continues to move down, it will gradually push the insertion rod 63 into the through hole, thereby preventing the insertion rod 63 from obstructing the downward movement of the slide cylinder 55.

[0077] Example 3:

[0078] A magnet 36 is fixedly connected inside the valve plug 32; the disk 41 is made of metal material, and in the initial state, the disk 41 is attracted to the magnet 36.

[0079] Since a magnet 36 is fixed inside the valve plug 32, when the disc 41 is located inside the ring 35 below the long cylinder 34, the disc 41 will be attracted to the magnet 36, thereby limiting the disc 41 and the long rod 4 and preventing the long rod 4 from rotating with the rectangular rod 22.

[0080] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crystallization device based on hydroxylamine hydrochloride mother liquor, comprising a crystallizer body; the crystallizer body comprising a shell (1); a steam exhaust connector (11) provided at the upper end of the shell (1); a liquid inlet connector (12) provided in the middle of the shell (1); a liquid drain connector (13) provided at the bottom of the shell (1); and a skirt baffle and a flow guide tube provided inside the shell (1); A drive assembly is installed on the top of the housing (1); a stirring rod (2) is rotatably connected to the top of the housing (1), and the drive assembly is used to drive the stirring rod (2); a drive rod is provided on the top of the housing (1), and the drive rod is sleeved on the stirring rod (2) and extends to the top of the guide tube; the drive rod is fixedly connected to the guide tube through evenly arranged connecting rods; Auxiliary plates are uniformly arranged and fixed to the outer ring surface of the guide tube; a buffer tube (3) is fixed to the lower end of the shell (1), and the top of the buffer tube (3) is connected to the shell (1); a discharge connector (31) is installed below the buffer tube (3); characterized in that A rectangular groove (21) is provided at the bottom of the stirring rod (2); a rectangular rod (22) is slidably connected in the rectangular groove (21), and part of the rectangular rod (22) slides out of the stirring rod (2); a rotating shaft (23) is fixedly connected below the rectangular rod (22), and the rotating shaft (23) extends into the buffer cylinder (3); a spiral plate (24) is fixedly connected to the rotating shaft (23); The inner cavity of the discharge connector (31) has a rectangular cross-section; a valve plug (32) is slidably connected inside the discharge connector (31), and the valve plug (32) is rectangular; a discharge pipe (33) is fixedly connected to the discharge connector (31) below the valve plug (32); a long cylinder (34) is fixedly connected inside the valve plug (32), and the long cylinder (34) extends above the valve plug (32); the inner ring surface of the long cylinder (34) is threaded; and rings (35) are fixedly connected to the top and bottom of the long cylinder (34). The long cylinder (34) is provided with a long rod (4), and there is a gap between the long rod (4) and the inner cavity of the long cylinder (34); a disc (41) is fixedly connected to the bottom of the long rod (4), and the outer ring surface of the disc (41) is threaded; the disc (41) is initially located in the bottom ring (35), and the height of the disc (41) is the same as the height of the ring (35); Both the rotating shaft (23) and the rectangular rod (22) have round holes, and the long rod (4) passes through the round holes in the rotating shaft (23) and the rectangular rod (22) and extends into the rectangular groove (21); the side of the long rod (4) extending into the rectangular groove (21) is rotatably connected to the stirring rod (2) through a bearing; The top of the rectangular rod (22) is fixedly connected to two fixed rods (25); a first drive ring (26) is fixedly connected to the two fixed rods (25), and the long rod (4) passes through the first drive ring (26); the lower surface of the first drive ring (26) is rotatably connected to a uniformly arranged first pawl (27); the upper surface of the first drive ring (26) is rotatably connected to a uniformly arranged second pawl (28); A second drive ring (42) is fixedly connected to the long rod (4) below the first drive ring (26); the upper surface of the second drive ring (42) is provided with uniformly arranged first ratchet grooves (43). When the first pawl (27) contacts the first ratchet groove (43), and when the first drive ring (26) drives the first pawl (27) below to rotate counterclockwise, the first pawl (27) itself will rotate and will not mesh with the first ratchet groove (43). When the first pawl (27) rotates clockwise, the first pawl (27) will mesh with the first ratchet groove (43) and drive the second drive ring (42) to rotate. A third drive ring (44) is fixedly connected above the first drive ring (26) at the top of the long rod (4); the lower surface of the third drive ring (44) is provided with uniformly arranged second ratchet grooves (45). When the second pawl (28) contacts the second ratchet groove (45), and when the first drive ring (26) drives the first pawl (27) above to rotate counterclockwise, the second pawl (28) will mesh with the second ratchet groove (45) and drive the third drive ring (44) to rotate. Both sides of the buffer cylinder (3) are provided with pressure relief components, and the pressure relief components are used to release the solution in the buffer cylinder (3).

2. The crystallization plant based on hydroxylamine hydrochloride mother liquor design as claimed in claim 1, wherein: The pressure relief assembly includes a short pipe (5); two short pipes (5) are installed on both the left and right sides of the buffer cylinder (3); two through holes (51) are opened on both the left and right sides of the buffer cylinder (3), and the short pipes (5) are connected to the corresponding through holes (51); a filter plate (52) is fixedly connected in each of the through holes (51). The two short tubes (5) located on the same side are connected by a conduit; an extension tube (53) is fixedly connected to the lower short tube (5) located on the same side, and the extension tubes (53) extend into the housing (1); an auger (54) is rotatably connected inside the two extension tubes (53), and the auger (54) is driven by a drive motor; a slide cylinder (55) is fixedly connected to the bottom of the spiral plate (24), and in the initial state, the bottom of the slide cylinder (55) is located below the through hole (51) below.

3. The crystallization equipment based on hydroxylamine hydrochloride mother liquor according to claim 2, characterized in that: Each of the short tubes (5) is fixedly connected to a mounting block (6); each of the mounting blocks (6) is slidably connected to a sliding rod (61); Each of the slide rods (61) is fixedly connected to a cross plate (62) at the other end, and a spring is fixedly connected between the cross plate (62) and the mounting block (6); each cross plate (62) is fixedly connected to a uniformly arranged insert rod (63) on one side facing the filter plate (52), and the insert rod (63) is conical, and the insert rod (63) initially rests against the slide cylinder (55); the bottom of the slide cylinder (55) is rounded.

4. The crystallization equipment based on hydroxylamine hydrochloride mother liquor according to claim 3, characterized in that: Each of the aforementioned inserts (63) has a ball fixedly attached to it.

5. The crystallization equipment based on hydroxylamine hydrochloride mother liquor according to claim 4, characterized in that: The cross plates (62) inside the two short tubes (5) located on the same side are connected by a connecting plate (64).

6. The crystallization apparatus based on hydroxylamine hydrochloride mother liquor according to claim 5, characterized in that: The bottom of the slide (55) is fixedly connected to a uniformly arranged arc-shaped plate (65).

7. The crystallization apparatus based on hydroxylamine hydrochloride mother liquor according to claim 6, characterized in that: The cross-section of the arc plate (65) is semi-circular.

8. The crystallization apparatus based on hydroxylamine hydrochloride mother liquor according to claim 7, characterized in that: The valve plug (32) has a magnet (36) fixed inside; the disk (41) is made of metal material and is initially attracted to the magnet (36).

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