A fluorosilicic acid evaporation tank

Abstract

The utility model discloses a fluorosilicic acid evaporating tank, including the jar body, the middle part downside in jar body is fixed with first baffle, and there is interval between first baffle top and jar body, and the middle part upside in jar body is fixed with second baffle, and second baffle extends downwards and exceeds first baffle top a distance, and first baffle and second baffle divide the jar body into evaporation chamber and condensing chamber, and second baffle is located evaporation chamber one side, and the channel is arranged between second baffle and first baffle, the jar body is located evaporation chamber one side and is provided with fluorosilicic acid circulation inlet and fluorosilicic acid circulation outlet, and the bottom of jar body is provided with secondary condensing water outlet in condensing chamber one side, and the jar body is located evaporation chamber downside and is also provided with liquid discharge pipe, the utility model discloses setting first baffle and second baffle in jar body, and the channel is arranged between first baffle and second baffle, thereby preventing the plugging of vent hole due to crystallization.

Description

Technical Field

[0001] This utility model relates to the technical field of anhydrous hydrogen fluoride production equipment, and in particular to a fluorosilicic acid evaporator. Background Technology

[0002] Our company's existing fluorosilicic acid evaporator for anhydrous hydrogen fluoride production consists of a central partition dividing the evaporator into an evaporation chamber and a condensation chamber. Several round holes are located on the upper side of the partition, serving as vents. During operation, the moisture in the fluorosilicic acid evaporates in the evaporation chamber and then enters the condensation chamber through these vents. However, due to the small diameter of these vents, crystallization easily occurs after prolonged operation, causing blockage and impacting production efficiency. To improve production efficiency, our technical staff has improved the existing fluorosilicic acid evaporator. Utility Model Content

[0003] The technical problem to be solved by this utility model is to solve the problems existing in the background art mentioned above and provide a fluorosilicic acid evaporator, in which a first partition and a second partition are provided in the tank body, and a channel is provided between the first partition and the second partition to prevent the vent hole from being blocked due to crystallization.

[0004] The purpose of this utility model is achieved as follows: A fluorosilicic acid evaporator includes a tank body. A first partition is fixedly provided on the lower middle side of the tank body, with a gap between the top of the first partition and the tank body. A second partition is fixedly provided on the upper middle side of the tank body, extending downward and exceeding the top of the first partition by a certain distance. The first and second partitions divide the interior of the tank body into an evaporation chamber and a condensation chamber. The second partition is located on one side of the evaporation chamber, and a channel is provided between the second partition and the first partition. The tank body has a fluorosilicic acid circulation inlet and a fluorosilicic acid circulation outlet on the side of the evaporation chamber, a secondary condensate outlet at the bottom of the tank body on the side of the condensation chamber, and a drain pipe on the lower side of the tank body located in the evaporation chamber.

[0005] The tank contains a defoaming device located on one side of the evaporation chamber. The defoaming device divides the evaporation chamber into upper and lower spaces. The fluorosilicic acid circulation inlet and the secondary condensate outlet are located on the lower side of the defoaming device, while the second baffle and channel are located on the upper side of the defoaming device.

[0006] The defoaming device includes a wire pad, which is fixedly connected to the first partition and the inner wall of the tank around its perimeter.

[0007] The defoaming device also includes a support base, a pressure plate, and a grid. The support base is fixed to the first partition and the inner wall of the tank. The pressure plate is installed on the support base by a plurality of first screws. The upper and lower sides of the wire pad are respectively provided with grids. The grids and the wire pad are pressed and fixed between the pressure plate and the support base.

[0008] A spray system is installed in the condensation chamber.

[0009] The spraying device includes a first three-way connector, one port of which is equipped with a liquid inlet pipe. The two opposite ports of the first three-way connector are respectively connected in series with a four-way connector via multiple connecting pipes. The other two ports of the four-way connector are respectively equipped with spray pipes. The last connecting pipe is connected to a second three-way connector. The two opposite ports of the second three-way connector are also respectively equipped with spray pipes. The ends of the spray pipes are closed, and nozzles are installed on the lower side of the spray pipes. The upper end of the liquid inlet pipe passes through the tank body and extends to the outside of the tank body. The liquid inlet pipe is fixedly connected to the tank body.

[0010] A flange is fixedly installed on the inlet pipe, and a ring seat is fixedly installed on the tank body. The flange is installed on the ring seat by bolts.

[0011] An inclined plate is provided in the condensation chamber. The higher end of the inclined plate is connected to the top of the first partition plate, and the lower end and the remaining end faces of the inclined plate are fixed to the inner wall of the tank. At least one guide hole is provided on the inclined plate, and the spray device is located below the guide hole.

[0012] The inclined plate has a guide frame fixed on the lower side of the guide hole, and the spraying device is located inside the guide frame.

[0013] A drain hole is provided at the lower end of the inclined plate.

[0014] The features of this utility model using the above-mentioned technical solution are: 1. This utility model provides a first partition and a second partition inside the tank, and a channel is provided between the first partition and the second partition to prevent the vent from being blocked due to crystallization.

[0015] 2. The tank of this utility model is equipped with a defoaming device on one side of the evaporation chamber. By setting the defoaming device, the mist in the steam is prevented from entering the condensation chamber.

[0016] 3. The condensation chamber of this utility model is equipped with a spray device, and the low-temperature atomized cooling water sprayed by the spray device condenses the water vapor into secondary condensate.

[0017] 4. The condenser chamber of this utility model is equipped with a spray device, and the low-temperature atomized cooling water sprayed by the spray device causes water vapor to condense into secondary condensate water quickly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a cross-sectional structural diagram of the evaporator of this utility model.

[0020] Figure 2This is a schematic diagram of the main structure of the spraying device of this utility model.

[0021] Figure 3 This is a top view of the spraying device of this utility model.

[0022] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0023] Figure label: Tank body 10, ring seat 101, first baffle 11, second baffle 12, channel 13, evaporation chamber 14, condensation chamber 15, fluorosilicic acid circulation inlet 16, fluorosilicic acid circulation outlet 17, secondary condensate outlet 18, inclined plate 19, guide hole 191, guide frame 192, drain hole 193. Spray device 20, first tee connector 21, connecting pipe 22, four-way connector 23, spray pipe 24, second tee connector 25, liquid inlet pipe 26, nozzle 27, flange 28. Ring seat 30; Defoaming device 40, support base 41, wire pad 42, pressure plate 43, first screw 44; Drain pipe 50. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0026] Example 1: See Figure 1A fluorosilicic acid evaporator includes a tank body 10. A first partition 11 is fixedly installed on the lower middle side of the tank body 10, with a gap between the top of the first partition 11 and the tank body 10. A second partition 12 is fixedly installed on the upper middle side of the tank body 10, extending downward and beyond the top of the first partition 11 by a certain distance. The first partition 11 and the second partition 12 divide the interior of the tank body 10 into an evaporation chamber 14 and a condensation chamber 15. The second partition 12 is located on one side of the evaporation chamber 14, and a channel 13 is provided between the second partition 12 and the first partition 11. A fluorosilicic acid circulation inlet 16 and a fluorosilicic acid circulation outlet 17 are provided on the side of the evaporation chamber 14 of the tank body 10. A secondary condensate outlet 18 is provided at the bottom of the tank body 10 on the side of the condensation chamber 15. A drain pipe 50 is also provided on the lower side of the evaporation chamber 14 of the tank body 10.

[0027] This invention provides a first partition 11 and a second partition 12 inside the tank 10. The first partition 11 and the second partition 12 have a large gap between them, thereby forming a channel 13 between the first partition 11 and the second partition 12. This can effectively prevent the problem of reduced production efficiency caused by crystallization blockage of the vent holes.

[0028] In use, the raw material fluorosilicic acid is combined with the concentrated fluorosilicic acid flowing out of the fluorosilicic acid circulation outlet 17, and then pumped into the heater for heating. After that, it is pumped into the evaporation chamber 14 through the fluorosilicic acid circulation inlet 16 for evaporation. The evaporated water enters the condensation chamber 15 through the channel 13 and is condensed into secondary condensate. Under the action of gravity, it flows out through the secondary condensate outlet 18. When the secondary condensate flows out, a negative pressure environment is simultaneously formed in the condensation chamber 15, so that the evaporated water can enter the condensation chamber 15 from the evaporation chamber 14. In this embodiment, the tank body 10 is made of fiberglass or polypropylene, and the first partition 11 and the second partition 12 are also made of fiberglass or polypropylene. The first partition 11 and the second partition 12 can be fixed to the inner wall of the tank body 10 by adhesive bonding.

[0029] Example 2: Based on Example 1, see Figure 1 A demisting device 40 is installed inside the tank body 10 on one side of the evaporation chamber 14. The demisting device 40 divides the evaporation chamber 14 into upper and lower spaces. The fluorosilicic acid circulation inlet 16 and the secondary condensate outlet 18 are located on the lower side of the demisting device 40, while the second baffle 12 and the channel 13 are located on the upper side of the demisting device 40. By installing the demisting device 40, mist in the steam is prevented from entering the condensation chamber 15.

[0030] In one embodiment, the defogging device 40 includes a wire pad 42, which is fixedly connected to the first partition 11 and the inner wall of the tank 10 on all four sides. The wire pad 42 is made of polypropylene, and its periphery can be bonded to the first partition 11 and the inner wall of the tank 10. Because the wire pad 42 is made of polypropylene, the mist in the gas is intercepted by the wire pad 42 after passing through it. The wire pad 42 can be constructed from multiple layers of folded wire mesh.

[0031] In another option, see Figure 4 The defoaming device 40 also includes a support base 41, a pressure plate 43, and a grid 45. The support base 41 is fixedly connected to the first partition 11 and the inner wall of the tank 10. The pressure plate 43 is installed on the support base 41 by a plurality of first screws 44. The grid 45 is respectively provided on the upper and lower sides of the wire pad 42. The grid 45 and the wire pad 42 are pressed and fixed between the pressure plate 43 and the support base 41. The wire pad 42 is supported by the grid 45 provided on the upper and lower sides, and the grid 45 and the wire pad 42 are fixed to the support base 41 by the pressure plate 43. The grid 45 is made of fiberglass or polypropylene.

[0032] Example 3: Based on Example 1 or Example 2, see Figure 1 , 2 3. A spray device 20 is installed in the condensation chamber 15. The low-temperature atomized cooling water sprayed by the spray device 20 causes water vapor to condense into secondary condensate water quickly, thereby improving the condensation effect.

[0033] Specifically, see Figure 2 , 3 The spraying device 20 includes a first three-way connector 21, one port of which is equipped with a liquid inlet pipe 26. The two opposite ports of the first three-way connector 21 are respectively connected in series with a four-way connector 23 via multiple connecting pipes 22. The other two ports of the four-way connector 23 are respectively equipped with spray pipes 24. The last connecting pipe 22 is connected to a second three-way connector 25. The two opposite ports of the second three-way connector 25 are also respectively equipped with spray pipes 24. The end of the spray pipe 24 is sealed by a cap. A nozzle 27 is installed on the lower side of the spray pipe 24. The upper end of the liquid inlet pipe 26 passes through the tank body 10 and extends to the outside of the tank body 10. The liquid inlet pipe 26 is fixedly connected to the tank body 10.

[0034] In this embodiment, the spray device 20 is made of polypropylene. The first tee connector 21, connecting pipe 22, four-way connector 23, spray pipe 24, and second tee connector 25 are fixed by heat fusion or adhesive bonding. The liquid inlet pipe 26 and the first tee connector 21 can be fixed by heat fusion, adhesive bonding, or threaded connection.

[0035] Nozzle 27 is a solid cone atomizing nozzle made of PP material. During installation, a threaded hole can be made on the lower side of the spray pipe 24, glue is applied to the threaded end of nozzle 27, and then the threaded end of nozzle 27 is screwed and fixed to the threaded hole on the lower side of spray pipe 24.

[0036] Further, see Figure 1 , 2 A flange 28 is fixedly mounted on the inlet pipe 26, and a ring seat 30 is fixedly mounted on the tank body 10. The flange 28 is bolted to the ring seat 30. This structure achieves the installation and fixation of the inlet pipe 26 and the tank body 10. The flange 28 is bonded and fixed to the inlet pipe 26.

[0037] Example 4: Based on Example 3, see Figure 1 An inclined plate 19 is installed inside the condensation chamber 15. The higher end of the inclined plate 19 is connected to the top of the first partition plate 11, and the lower end and the remaining end faces of the inclined plate 19 are fixed to the inner wall of the tank body 10. At least one guide hole 191 is provided on the inclined plate 19, and the spray device 20 is located below the guide hole 191. By providing the guide hole 191, water vapor flows downward from the guide hole 191. Since the spray device 20 is installed below the guide hole 191, the water vapor is concentrated for condensation.

[0038] Furthermore, the inclined plate 19 has a guide frame 192 fixed on the lower side of the guide hole 191, and the spraying device 20 is located inside the guide frame 192. When the water vapor passes through the guide frame 192, the water vapor can fully contact the condensate sprayed by the spraying device 20.

[0039] Further, see Figure 1 The lower end of the inclined plate 19 is provided with a drain hole 193, so that the condensate on the upper side of the inclined plate 19 flows into the condensation chamber 15 through the drain hole 193.

[0040] The working principle or process of this utility model: In use, the raw material fluorosilicic acid combines with the concentrated fluorosilicic acid flowing out of the fluorosilicic acid circulation outlet 17, and is then pumped into the heater for heating. After that, it is pumped into the evaporation chamber 14 through the fluorosilicic acid circulation inlet 16 for evaporation. The evaporated water is defoamed by the defoaming device 40 and then enters the condensation chamber 15 through the channel 13. The evaporated water comes into contact with the atomized low-temperature condensate in the condensation chamber 15 and condenses into secondary condensate. The secondary condensate flows out through the secondary condensate outlet 18 under the action of gravity.

[0041] When the secondary condensate flows out, a negative pressure environment is simultaneously formed in the condensation chamber 15, which allows the evaporated water to circulate from the evaporation chamber 14 into the condensation chamber 15.

[0042] The secondary condensate flowing out of the secondary condensate outlet 18 is pumped back into the condenser to cool down, and then pumped back into the spray device 20 for atomized spraying, forming a cycle.

[0043] The concentrated fluorosilicic acid is discharged through the drain pipe 50 on the side of the evaporation chamber 14. A valve is installed on the drain pipe 50. When discharge is required, the valve on the drain pipe 50 is opened.

[0044] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Any modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A fluorosilicic acid evaporator, comprising a tank body (10), characterized in that: A first partition (11) is fixedly installed on the lower middle side of the tank (10). The top of the first partition (11) is spaced from the tank (10). A second partition (12) is fixedly installed on the upper middle side of the tank (10). The second partition (12) extends downward and exceeds the top of the first partition (11) by a certain distance. The first partition (11) and the second partition (12) divide the interior of the tank (10) into an evaporation chamber (14) and a condensation chamber (15). The second partition (12) is located on one side of the evaporation chamber (14). A channel (13) is provided between the second partition (12) and the first partition (11). The tank (10) has a fluorosilicic acid circulation inlet (16) and a fluorosilicic acid circulation outlet (17) on the side of the evaporation chamber (14). The tank (10) has a secondary condensate outlet (18) at the bottom on the side of the condensation chamber (15). The tank (10) is also equipped with a drain pipe (50) located below the evaporation chamber (14).

2. A fluorosilicic acid evaporator tank as defined in claim 1, wherein: The tank (10) is equipped with a defoaming device (40) located on one side of the evaporation chamber (14). The defoaming device (40) divides the evaporation chamber (14) into upper and lower spaces. The fluorosilicic acid circulation inlet (16) and the secondary condensate outlet (18) are located on the lower side of the defoaming device (40), and the second partition (12) and the channel (13) are located on the upper side of the defoaming device (40).

3. A fluorosilicic acid evaporator tank as defined in claim 2, wherein: The defoaming device (40) includes a wire pad (42), which is fixedly connected to the first partition (11) and the inner wall of the tank (10) on all four sides.

4. A fluorosilicic acid evaporator tank as defined in claim 3, wherein: The defoaming device (40) also includes a support base (41), a pressure plate (43), and a grid (45). The support base (41) is fixed to the inner wall of the first partition (11) and the tank body (10). The pressure plate (43) is installed on the support base (41) by a plurality of first screws (44). The upper and lower sides of the wire pad (42) are respectively provided with grids (45). The grids (45) and the wire pad (42) are pressed and fixed between the pressure plate (43) and the support base (41) around their perimeters.

5. A fluorosilicic acid evaporating tank according to any one of claims 1 to 4, characterized in that: A spray device (20) is installed inside the condensation chamber (15).

6. A fluorosilicic acid evaporator according to claim 5, characterized in that: The spraying device (20) includes a first three-way connector (21), one of the ports of the first three-way connector (21) is equipped with an inlet pipe (26), the two opposite ports of the first three-way connector (21) are respectively connected in series with a four-way connector (23) through multiple connecting pipes (22), the other two ports of the four-way connector (23) are respectively equipped with spray pipes (24), the last connecting pipe (22) is connected to a second three-way connector (25), the two opposite ports of the second three-way connector (25) are also respectively equipped with spray pipes (24), the end of the spray pipe (24) is closed, and a nozzle (27) is installed on the lower side of the spray pipe (24); the upper end of the inlet pipe (26) passes through the tank (10) and extends to the outside of the tank (10), and the inlet pipe (26) is fixedly connected to the tank (10).

7. A fluorosilicic acid evaporator tank as defined in claim 6, wherein: A flange (28) is fixedly installed on the inlet pipe (26), and a ring seat (30) is fixedly installed on the tank body (10). The flange (28) is installed on the ring seat (30) by bolts.

8. A fluorosilicic acid evaporator tank as defined in claim 5, wherein: An inclined plate (19) is provided inside the condensation chamber (15). The higher end of the inclined plate (19) is connected to the top of the first partition plate (11), and the lower end and the remaining end faces of the inclined plate (19) are fixed to the inner wall of the tank body (10). At least one guide hole (191) is provided on the inclined plate (19), and the spray device (20) is located below the guide hole (191).

9. A fluorosilicic acid evaporator according to claim 8, characterized in that: The inclined plate (19) has a guide frame (192) fixed on the lower side of the guide hole (191), and the spray device (20) is located inside the guide frame (192).

10. A fluorosilicic acid evaporator according to claim 8, characterized in that: The lower end of the inclined plate (19) is provided with a drain hole (193).

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