A crystallization device for producing ammonium perchlorate

Abstract

The present invention relates to a technical field of sodium chlorate production, and specifically to a crystallization device for producing ammonium perchlorate. The device comprises a crystallizer, wherein a ring plate is rotatably connected to the lower end of the outer edge of the crystallizer, a spiral tube is spirally arranged on the outer side of the crystallizer above the ring plate, an expansion water stop strip is fixed in the spiral gap of the spiral tube, an outlet pipe and an inlet pipe connected to the spiral tube are fixed at the upper and lower ends of the spiral tube, respectively, a first retaining ring is fixed on the vertical portion of the inlet pipe, and a second retaining ring is fixed on the vertical portion of the outlet pipe, an outer shell is sleeved on the outer side of the crystallizer, a first arc-shaped limiting hole is opened on the ring plate, and a second arc-shaped limiting hole is opened on the top plate of the outer shell. After cooling water flows through the spiral tube, condensation water appears on the outer edge of the spiral tube. After the condensation water contacts the expansion water stop strip, the expansion water stop strip can expand, thereby increasing the pitch of the spiral tube, and the spiral tube will be further pressed against the outer edge of the crystallizer, thereby improving the heat transfer effect between the spiral tube and the crystallizer.

Description

Technical Field

[0001] The invention relates to the technical field of sodium chlorate production, in particular to a crystallization device for producing ammonium perchlorate. Background Art

[0002] Ammonium chlorate is an inorganic compound used as an oxidant, preservative, and additive. An ammonium chloride solution is added to a reactor containing a sodium chlorate solution to react, producing an ammonium chlorate solution and sodium chloride crystals. The sodium chloride is then removed by filtration. The resulting ammonium chlorate solution is refined and sold as a commercial product. Ammonium chlorate is then obtained through appropriate evaporation and concentration, cooling and crystallization, and centrifugation.

[0003] The cooling crystallization process of ammonium chlorate solution requires a crystallizer. The crystallizer generally consists of a tank body with a spiral tube fixed inside or outside the tank body. During the crystallization process, the cooling medium flows through the spiral tube, cooling and crystallizing the crystallizer. To reduce the heat exchange between the spiral tube and the outside air, an outer cover is fixed to the outside of the crystallizer, enclosing the spiral tube between the outer cover and the crystallizer. If the spiral tube of this crystallizer is damaged, it is difficult to remove and repair it, making subsequent maintenance difficult and costly. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a crystallization device for producing ammonium perchlorate, which has good stability after the spiral tube is installed, is convenient for maintaining the spiral tube after being separated from the crystallization tank, and can reduce the maintenance cost and difficulty of the crystallization tank in the later stage.

[0005] In order to achieve the above object, the technical solution provided by the present invention is:

[0006] A crystallization device for producing ammonium perchlorate comprises a crystallization tank, wherein the lower end of the outer edge of the crystallization tank is rotatably connected to a ring plate, the lower end of the crystallization tank is provided with a driving device for driving the ring plate to rotate, a spiral tube with elasticity is sleeved on the outer side of the crystallization tank above the ring plate, an expansion water stop strip is fixed in the spiral gap of the spiral tube, an outlet pipe and an inlet pipe are fixed at the upper end and the lower end of the spiral tube respectively, the outlet pipe and the inlet pipe are both in an inverted L shape and are connected to the spiral tube, a first retaining ring is fixed on the vertical portion of the water inlet pipe, a second retaining ring is fixed on the vertical portion of the water outlet pipe, and the outer side of the crystallization tank is provided with a spring. A shell is provided, and the upper end of the spiral tube contacts the top plate of the shell through an expansion water stop strip. The lower end of the shell is slidably connected to the ring plate in the vertical direction. An arc-shaped first limiting hole is provided on the ring plate, and an arc-shaped second limiting hole is provided on the top plate of the shell. The positive projection of the second limiting hole on the top plate of the shell on the ring plate is symmetrical according to the axis of the crystallization tank and the center of the first limiting hole on the ring plate. The first retaining ring is allowed to pass through the first limiting hole, and the second retaining ring is allowed to pass through the second limiting hole. After the ring plate and the shell are rotated, the ring plate allows the first retaining ring and the second retaining ring to be blocked and limited.

[0007] Specifically, the driving device includes a gear ring fixed to the inner edge of the ring plate, a motor is fixedly connected to the crystallizer, a gear is fixed to the output shaft of the motor, and the gear is meshed with the gear ring.

[0008] Specifically, the spiral tube is in sliding contact with the outer edge of the crystallization tank.

[0009] Specifically, a plurality of vertical limiting plates are fixed to the lower end of the shell, through holes corresponding to the limiting plates are opened on the ring plate, the limiting plates pass through the through holes, and the limiting plates are slidably connected to the through holes in the vertical direction.

[0010] Specifically, the first limiting hole includes a first large end and a first small end, the first large end and the first small end are connected by a first connecting section, the first large end of the first limiting hole allows the first retaining ring to pass through, the first retaining ring is located below the first small end of the first limiting hole, and the rear ring plate allows the second retaining ring to be blocked, the second limiting hole includes a second large end and a second small end, the second large end and the second small end are connected by a second connecting section, the second large end of the second limiting hole allows the second retaining ring to pass through, the second retaining ring is located above the second small end of the second limiting hole, and the top plate of the rear shell allows the second retaining ring to be blocked.

[0011] Specifically, a convex ring is processed at the lower end of the outer edge of the crystallization tank, and a ring plate is rotatably connected to the convex ring. An arc-shaped support plate is fixed to the upper end of the convex ring. The support plate supports the lower part of the spiral tube and blocks the lower end of the spiral tube in the circumferential direction.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. After the cooling water flows through the spiral tube, condensation water will appear on the outer edge of the spiral tube. After the condensation water contacts the expansion water stop strip, the expansion water stop strip can expand, thereby increasing the pitch of the spiral tube. The spiral tube will further cling to the outer edge of the crystallization tank, thereby improving the heat transfer effect between the spiral tube and the crystallization tank.

[0014] 2. After the expansion water stop strip at the upper end of the spiral tube absorbs water and expands, it will push the shell upward a certain distance relative to the straight part of the outlet pipe, thereby increasing the pressure between the second retaining ring and the top plate of the shell, thereby making the connection stability between the outlet pipe and the shell better.

[0015] 3. When the spiral tube is damaged, it is convenient to disassemble the spiral tube and to maintain the spiral tube after separating it from the crystallizer, which can reduce the cost and difficulty of later maintenance of the crystallizer.

[0016] 4. The spiral tube is easy to install, which can improve the assembly efficiency of the device and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional view of the present invention.

[0018] Figure 2 This is a schematic diagram of the combination of the crystallization tank and the spiral tube.

[0019] Figure 3 It is a cross-sectional view of the present invention.

[0020] Figure 4 for Figure 3 Magnified view of area A in center.

[0021] Figure 5 for Figure 3 Magnified view of area B.

[0022] Figure 6 A top view of the ring plate.

[0023] Figure 7 A top view of the housing.

[0024] The names of the parts in the accompanying drawings are:

[0025] 1. Crystallization tank; 2. Support plate; 3. Ring plate; 4. First limiting hole; 4.1. First small end; 4.2. First large end; 4.3. First connecting section; 5. Gear ring; 6. Gear; 7. Motor; 8. Through hole; 9. Housing; 10. Second limiting hole; 101. Second small end; 102. Second large end; 103. Second connecting section; 11. Limiting plate; 12. Spiral tube; 13. Expansion water stop; 14. Water inlet pipe; 15. First retaining ring; 16. Water outlet pipe; 17. Second retaining ring. DETAILED DESCRIPTION

[0026] like Figure 1 and Figure 2 As shown, a crystallization device for producing ammonium perchlorate includes a crystallization tank 1, a convex ring is processed at the lower end of the outer edge of the crystallization tank 1, and a ring plate 3 is rotatably connected to the convex ring. A driving device for driving the ring plate 3 to rotate is provided at the lower end of the crystallization tank 1.

[0027] like Figure 3 and Figure 4 As shown, the driving device includes a gear ring 5 fixed to the inner edge of the ring plate 3, a motor 7 is fixedly connected to the crystallizer 1, a gear 6 is fixed on the output shaft of the motor 7, and the gear 6 is meshed with the gear ring 5.

[0028] like Figure 3 and Figure 5As shown, an elastic spiral tube 12 is sleeved on the outer side of the crystallization tank 1 above the ring plate 3, and the spiral tube 12 is in sliding contact with the outer edge of the crystallization tank 1. An expansion water stop strip 13 is fixed in the spiral gap of the spiral tube 12. An arc-shaped support plate 2 is fixed to the upper end of the convex ring, and the support plate 2 supports the lower part of the spiral tube 12. The support plate 2 blocks the lower end of the spiral tube 12 in the circumferential direction. An outlet pipe 16 and a water inlet pipe 14 are fixed to the upper end of the spiral tube 12 and the lower end of the spiral tube 12 respectively. The outlet pipe 16 and the water inlet pipe 14 are both in an inverted L shape and are connected to the spiral tube 12. A first retaining ring 15 is fixed to the vertical part of the water inlet pipe 14. A second retaining ring 17 is fixed to the vertical part of the water outlet pipe 16.

[0029] like Figure 1 and Figure 2 As shown, the outer shell 9 is sheathed around the crystallizer 1, and the upper end of the spiral tube 12 contacts the top plate of the shell 9 via an expansion water stop 13. A plurality of vertical stop plates 11 are fixed to the lower end of the shell 9, and through holes 8 corresponding to the stop plates 11 are formed in the ring plate 3. The stop plates 11 extend through the through holes 8 and are vertically slidably connected to the through holes 8.

[0030] like Figure 1 and Figure 3 As described above, the ring plate 3 is provided with an arc-shaped first limiting hole 4. The top plate of the housing 9 is provided with an arc-shaped second limiting hole 10. The orthographic projection of the second limiting hole 10 on the top plate of the housing 9 on the ring plate 3 is symmetrical with the center of the first limiting hole 4 on the ring plate 3 about the axis of the crystallizer 1.

[0031] like Figure 3 and Figure 6 As shown, the first retaining ring 15 is allowed to pass through the first limiting hole 4. The first limiting hole 4 includes a first large end 4.2 and a first small end 4.1, which are connected by a first connecting section 4.3. The first large end 4.2 of the first limiting hole 4 allows the first retaining ring 15 to pass through. After the first retaining ring 15 is positioned below the first small end 4.1 of the first limiting hole 4, the ring plate 3 allows the first retaining ring 15 to be blocked.

[0032] like Figure 3 and Figure 7 As shown, the second retaining ring 17 is allowed to pass through the second limiting hole 10. The second limiting hole 10 includes a second large end 102 and a second small end 101, and the second large end 102 and the second small end 101 are connected by a second connecting section 103. The second large end 102 of the second limiting hole 10 allows the second retaining ring 17 to pass through. The second retaining ring 17 is located above the second small end 101 of the second limiting hole 10, and the top plate of the rear housing 9 allows the second retaining ring 17 to be blocked.

[0033] During installation, the spiral tube 12 is placed on the outside of the crystallization tank 1, the first retaining ring 15 passes through the first large end 4.2 of the first limiting hole 4, and the lower part of the spiral tube 12 is supported by the support plate 2. Figure 2 shown.

[0034] Then, the outer shell 9 is placed on the outer side of the spiral tube 12, and the second retaining ring 17 is passed through the second large end 102 of the second limiting hole 10, and the limiting plate 11 is passed through the through hole 8. The state at this time is as follows: Figure 1 As shown, the state after cutting is as follows Figure 3 shown.

[0035] Then, motor 7 is started. The gear 6 and gear ring 5 cooperate to drive ring plate 3 to rotate counterclockwise. Ring plate 3, through the cooperation of through-hole 8 and stop plate 11, drives housing 9 to rotate together. When first retaining ring 15 is positioned below first small end 4.1 of first stop hole 4, second retaining ring 17 is positioned above first small end 4.1 of second stop hole 10. Motor 7 is then turned off. This completes the preliminary connection between spiral tube 12, housing 9, and ring plate 3.

[0036] Because the support plate 2 blocks the lower end of the spiral tube 12 in the circumferential direction, the spiral tube 12 is not driven to rotate together through the water inlet pipe 14 and the water outlet pipe 16 when the ring plate 3 rotates counterclockwise.

[0037] During the process of cooling and crystallizing the material in the crystallizer 1 , the cooling medium enters from the water inlet pipe 14 , flows through the spiral tube 12 , and is discharged from the water outlet pipe 16 .

[0038] The spiral tube 12 can cool the crystallizer 1. During the process of the spiral tube 12 cooling the crystallizer 1, water vapor in the air will condense into water droplets on the outside of the spiral tube 12. After the water droplets are absorbed by the expansion water stop strip 13, the expansion water stop strip 13 will expand. Since the first retaining ring 15 is blocked by the ring plate 3, the expansion water stop strip 13 will expand. During the process, the spiral spiral tube 12 is stretched, thereby increasing the pitch of the spiral tube 12. The top of the spiral tube 12 will push the shell 9 to move upward, and the limit plate 11 will slide in the through hole 8. After the spirally wound spiral tube 12 is stretched, its pitch increases, and the internal space of the spirally wound spiral tube 12 becomes smaller. Therefore, the spiral tube 12 will further cling to the outer edge of the crystallizer 1, thereby making the fixing effect of the spiral tube 12 on the outside of the crystallizer 1 better, and at the same time improving the heat transfer efficiency between the spiral tube 12 and the crystallizer 1.

[0039] After the expansion water stop strip 13 at the upper end of the spiral tube 12 absorbs water and expands, it will push the outer shell 9 upward a certain distance relative to the straight part of the water outlet pipe 16, thereby increasing the pressure between the second retaining ring 17 and the top plate of the outer shell 9, thereby making the connection stability between the water outlet pipe 16 and the outer shell 9 better.

[0040] When the spiral tube 12 needs to be inspected and repaired, stop inputting cooling medium into the spiral tube 12, circulate high-temperature water into the spiral tube 12, or introduce high-temperature air into the annular cavity between the outer shell 9 and the crystallizer 1, so as to dry the expansion water stop strip 13. The expansion water stop strip 13 shrinks after drying, and the spiral tube 12 will shrink. After the spiral tube 12 shrinks, the pressure of the spiral tube 12 on the crystallizer 1 is reduced, and then the motor 7 is started to make the outer shell 9 and the ring plate 3 rotate clockwise. When the first baffle ring 15 is located below the first large end 4.2 of the first limiting hole 4, the second baffle ring 17 is located above the second large end 102 of the second limiting hole 10, and then the outer shell 9 and the spiral tube 12 can be removed in turn.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A crystallization device for producing ammonium perchlorate, comprising a crystallization tank (1), characterized in that: The lower end of the outer edge of the crystallizer (1) is rotatably connected to a ring plate (3), the lower end of the crystallizer (1) is provided with a driving device for driving the ring plate (3) to rotate, the outer side of the crystallizer (1) above the ring plate (3) is provided with an elastic spiral tube (12), an expansion water stop strip (13) is fixed in the spiral gap of the spiral tube (12), and an outlet pipe (16) and a water inlet pipe (14) are respectively fixed at the upper end and the lower end of the spiral tube (12), and the outlet pipe (16) and the water inlet pipe (14) are respectively fixed. The tubes (14) are all in an inverted L-shape and are connected to the spiral tube (12). A first retaining ring (15) is fixed on the vertical portion of the water inlet pipe (14), and a second retaining ring (17) is fixed on the vertical portion of the water outlet pipe (16). The outer side of the crystallization tank (1) is provided with a shell (9). The upper end of the spiral tube (12) contacts the top plate of the shell (9) through the expansion water stop strip (13). The lower end of the shell (9) is slidably connected to the ring plate (3) in the vertical direction. The ring plate (3) is provided with an arc-shaped first retaining ring (17). A limiting hole (4), wherein the first limiting hole (4) includes a first large end (4.2) and a first small end (4.1), the first large end (4.2) and the first small end (4.1) are connected via a first connecting section (4.3), and an arc-shaped second limiting hole (10) is provided on the top plate of the housing (9), the second limiting hole (10) includes a second large end (102) and a second small end (101), the second large end (102) and the second small end (101) are connected via a second connecting section (1 03), the positive projection of the second limiting hole (10) on the top plate of the shell (9) on the ring plate (3) is symmetrical with the center of the first limiting hole (4) on the ring plate (3) according to the axis of the crystallization tank (1), the first retaining ring (15) is allowed to pass through the first limiting hole (4), and the second retaining ring (17) is allowed to pass through the second limiting hole (10), and after the ring plate (3) and the shell (9) are rotated, the ring plate (3) is allowed to block and limit the first retaining ring (15) and the second retaining ring (17).

2. A crystallization device for producing ammonium perchlorate according to claim 1, characterized in that The driving device comprises a gear ring (5) fixed to the inner edge of the ring plate (3); a motor (7) is fixedly connected to the crystallization tank (1); a gear (6) is fixed to the output shaft of the motor (7); and the gear (6) is meshed with the gear ring (5).

3. A crystallization device for producing ammonium perchlorate according to claim 1, characterized in that The spiral tube (12) is in sliding contact with the outer edge of the crystallization tank (1).

4. A crystallization device for producing ammonium perchlorate according to claim 1, characterized in that A plurality of vertical limiting plates (11) are fixed to the lower end of the housing (9); through holes (8) corresponding to the limiting plates (11) are provided on the ring plate (3); the limiting plates (11) pass through the through holes (8); and the limiting plates (11) are slidably connected to the through holes (8) in the vertical direction.

5. A crystallization device for producing ammonium perchlorate according to claim 1, characterized in that: The first large end (4.2) of the first limiting hole (4) allows the first retaining ring (15) to pass through, and after the first retaining ring (15) is located below the first small end (4.1) of the first limiting hole (4), the ring plate (3) allows the first retaining ring (15) to be blocked; the second large end (102) of the second limiting hole (10) allows the second retaining ring (17) to pass through, and after the second retaining ring (17) is located above the second small end (101) of the second limiting hole (10), the top plate of the housing (9) allows the second retaining ring (17) to be blocked.

6. A crystallization device for producing ammonium perchlorate according to claim 1, characterized in that: The lower end of the outer edge of the crystallization tank (1) is processed with a convex ring, the ring plate (3) is rotatably connected to the convex ring, and an arc-shaped support plate (2) is fixed to the upper end of the convex ring. The support plate (2) supports the lower part of the spiral tube (12), and the support plate (2) blocks the lower end of the spiral tube (12) in the circumferential direction.

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