Device for removing impurities after trifluoroacetyl chloride precipitation

Abstract

The utility model relates to the technical field of trifluoroacetyl chloride production, and discloses a device for removing impurities after trifluoroacetyl chloride precipitation, which comprises a precipitation tank, a rotating shaft is coaxially and rotatably mounted in the precipitation tank, and a motor for driving the rotating shaft to rotate is fixedly mounted on the precipitation tank; a mounting plate is radially and fixedly arranged on the rotating shaft; a mounting groove with a downward notch is formed in the mounting plate in the radial direction of the rotating shaft, and a scraper is slidably mounted in the mounting groove; the bottom of the scraper is in sliding contact with the inner wall of the bottom of the settling tank; the impurity pushing surface of the scraper is in sliding contact with the mounting plate; the inner wall of the bottom of the settling tank is provided with a push-up assembly for pushing the scraper to slide up, and the mounting groove of the mounting plate is internally provided with a vibration assembly for vibrating the scraper; an impurity collecting box with an upward box opening and communicated with the settling tank is slidably mounted at the bottom of the settling tank; the top plane of the impurity collecting box is flush with the inner wall of the bottom of the settling tank. Impurities on the scraping plate can be removed through the mounting plate, impurities on the scraping plate and the mounting plate can be removed through vibration, the structure is simple, and the impurity removal effect is good.

Description

Technical Field

[0001] This utility model relates to the field of trifluoroacetyl chloride production technology, and in particular to a device for removing impurities after trifluoroacetyl chloride precipitation. Background Technology

[0002] Trifluoroacetyl chloride is a volatile, colorless gas with a pungent odor. It is easily hydrolyzed and readily soluble in organic solvents. It is mainly used in the synthesis of trifluoroacetic acid or other derivatives and is an important raw material for the synthesis of pharmaceuticals and pesticides. Precipitation and impurity removal are generally used in the pretreatment of raw materials before the preparation of trifluoroacetyl chloride, the removal of impurities from intermediate products during the preparation process, and the purification of the product after the trifluoroacetyl chloride preparation reaction. It is a crucial step in product purification.

[0003] The PAC storage tank sedimentation and impurity cleaning device described in announcement number CN219273959U includes a PAC storage tank, a tank cover on the top of the PAC storage tank with a dosing port on the tank cover, and a discharging port on the lower part of the side wall of the PAC storage tank; a motor is installed at the center of the upper side of the tank cover, and the main shaft of the motor is coaxially connected to a rotating shaft that passes through the tank cover and extends into the PAC storage tank; a scraper is provided at the lower end of the rotating shaft at the bottom of the PAC storage tank, and a drain port is opened at the bottom of the PAC storage tank.

[0004] Based on the above technical features, the problem is that in the prior art, impurities are easily adhered to the scraper by the liquid, and the impurities adhering to the scraper are difficult to clean, resulting in poor impurity removal effect.

[0005] Therefore, it is necessary to solve the above problems by using a device for removing impurities after trifluoroacetyl chloride precipitation. Utility Model Content

[0006] The purpose of this invention is to provide a device for removing impurities after trifluoroacetyl chloride precipitation, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a device for removing impurities after trifluoroacetyl chloride precipitation, comprising a precipitation tank, a rotating shaft coaxially mounted inside the precipitation tank, and a motor for driving the rotating shaft to rotate fixedly mounted on the precipitation tank; a mounting plate is fixedly arranged radially on the rotating shaft; a downward-facing mounting groove is formed on the mounting plate along the radial direction of the rotating shaft, and a scraper is slidably mounted in the mounting groove; the bottom of the scraper is in sliding contact with the bottom inner wall of the precipitation tank, and the surface of the scraper that pushes impurities is in sliding contact with the mounting plate; an upward-pushing component for pushing the scraper to slide upward is installed on the bottom inner wall of the precipitation tank, and a vibration component for causing the scraper to fall and vibrate is installed in the mounting groove of the mounting plate; an impurity collection box with its opening facing upward and communicating with the precipitation tank is slidably mounted at the bottom of the precipitation tank; the top plane of the impurity collection box is flush with the bottom inner wall of the precipitation tank.

[0008] Preferably, the upward pushing assembly includes a connecting ring, which is sleeved on the rotating shaft; the rotating shaft is rotatably connected to the connecting ring, and the connecting ring is fixedly connected to the sedimentation tank; a transmission block is fixedly disposed on the connecting ring, and a transmission inclined surface is formed on the transmission block along the circumference of the rotating shaft; a transmission shaft is fixedly disposed radially at the end of the scraper near the rotating shaft, and the transmission shaft and the transmission inclined surface of the transmission block are in contact and abut against each other for transmission.

[0009] Preferably, the mounting plate has an opening at the end near the rotating shaft for the drive shaft to slide up and down, and the opening is connected to the mounting groove.

[0010] Preferably, a plurality of vertically placed guide rods are fixedly provided on the top of the scraper, and the plurality of guide rods are evenly distributed at equal intervals along the radial direction of the rotating shaft; each guide rod extends upward through the mounting plate and is in a limiting sliding fit with the mounting plate.

[0011] Preferably, the transmission block corresponds to the impurity collection box.

[0012] Preferably, a sealing block is fixedly provided on the top of the drive shaft along the radial direction, and the sealing block seals the opening.

[0013] Preferably, the vibration assembly includes multiple springs, each corresponding to a guide rod; each spring is sleeved on the corresponding guide rod, and each spring is fixedly connected to the scraper and the mounting plate.

[0014] Preferably, both the connecting ring and the mounting plate have a guide slope on their top end faces.

[0015] Preferably, the sedimentation tank has a feeding port at the top, and a discharge pipe is fixedly and connected to the side of the sedimentation tank; the bottom of the discharge pipe where it connects to the sedimentation tank is higher than the bottom inner wall of the sedimentation tank.

[0016] Preferably, the sedimentation tank has a notch for the impurity collection box to slide in and out, and the impurity collection box seals the notch.

[0017] The technical effects and advantages of this utility model are as follows: This utility model pushes the scraper upward by the upward pushing component, so that the mounting plate removes the impurities adhering to the scraper. At the same time, the vibration component makes the scraper vibrate, thereby removing impurities from the scraper and the mounting plate. The structure is simple and the impurity removal effect is good. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the interior of the sedimentation tank of this utility model;

[0020] Figure 3 This is an enlarged schematic diagram of point A in this utility model;

[0021] Figure 4 This is a schematic diagram of the interior of the mounting plate of this utility model;

[0022] Figure 5 This is a partial three-dimensional schematic diagram of the present invention.

[0023] In the diagram: 1. Sedimentation tank; 2. Motor; 3. Feed port; 4. Impurity collection box; 5. Rotary shaft; 6. Discharge pipe; 7. Scraper; 8. Mounting plate; 9. Guide rod; 10. Transmission block; 11. Spring; 12. Transmission shaft; 13. Mounting groove; 14. Sealing block; 15. Connecting ring. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figures 1 to 5 The device shown is for removing impurities after precipitation of trifluoroacetyl chloride, including a precipitation tank 1. A rotating shaft 5 is coaxially rotatably installed inside the precipitation tank 1, and a motor 2 is fixedly installed on the top of the precipitation tank 1. The output shaft of the motor 2 is coaxially and fixedly connected to the rotating shaft 5.

[0026] A feed port 3 is provided at the top of the sedimentation tank 1, and a discharge pipe 6 is fixedly installed and connected to the side of the sedimentation tank 1. A control valve is fixedly installed inside the discharge pipe 6. The bottom of the discharge pipe 6, where it connects to the sedimentation tank 1, is higher than the bottom inner wall of the sedimentation tank 1 to facilitate the outflow of the precipitated trifluoroacetyl chloride solution.

[0027] An upward-facing groove is formed on the inner bottom wall of the sedimentation tank 1 along the radial direction of the rotating shaft 5. An impurity collection box 4 is slidably installed within the groove. The opening of the impurity collection box 4 faces upward and communicates with the interior of the sedimentation tank 1. The top plane of the impurity collection box 4 is flush with the inner bottom wall of the sedimentation tank 1.

[0028] A notch is provided on the side of the sedimentation tank 1 for the impurity collection box 4 to slide in and out, and the impurity collection box 4 seals the notch. A pull rod is fixedly installed at the end of the impurity collection box 4 away from the rotating shaft 5, and the pull rod is located outside the sedimentation tank 1.

[0029] A mounting plate 8 is fixedly installed radially on the rotating shaft 5, and a connecting block is fixedly installed at the top of the mounting plate 8. The connecting block is fixedly connected to the rotating shaft 5. A downward-facing mounting groove 13 is opened on the mounting plate 8 along the radial direction of the rotating shaft 5, and a scraper 7 is slidably installed in the mounting groove 13. The bottom of the scraper 7 is in sliding contact with the bottom inner wall of the sedimentation tank 1, and the surface of the scraper 7 that pushes impurities is in sliding contact with the mounting plate 8.

[0030] An upward-pushing assembly for pushing the scraper 7 upward is installed on the bottom inner wall of the sedimentation tank 1. Specifically, the upward-pushing assembly includes a connecting ring 15, which is sleeved on the rotating shaft 5. The rotating shaft 5 and the connecting ring 15 are rotatably connected in a sealed manner, and the connecting ring 15 is fixedly connected to the sedimentation tank 1.

[0031] A transmission block 10 is fixedly mounted on the connecting ring 15. The position of the transmission block 10 corresponds to that of the impurity collection box 4 and is located on the center line of the impurity collection box 4 along the radial direction of the rotating shaft 5. A transmission inclined surface is formed on the transmission block 10 along the circumference of the rotating shaft 5, and the transmission inclined surface spirals upward along the circumference of the rotating shaft 5. The lower end of the transmission inclined surface is smoothly connected to the top end face of the connecting ring 15, and the upper end of the transmission inclined surface is connected to the vertical end face of the transmission block 10. The central axis of the rotating shaft 5 is located on the vertical end face of the transmission block 10.

[0032] The drive shaft 12 is fixedly installed radially along the shaft 5 at the end of the scraper 7 near the shaft 5. The drive shaft 12 is in contact with the drive ramp of the drive block 10 for transmission.

[0033] An opening is provided at the end of the mounting plate 8 near the rotating shaft 5 for the drive shaft 12 to slide up and down, and the opening connects to the mounting groove 13. A sealing block 14 is fixedly installed radially on the top of the drive shaft 12, and the sealing block 14 slides in contact with the end of the mounting plate 8 near the rotating shaft 5 and always blocks the opening. A clearance through hole is provided on the connecting block for the sealing block 14 to slide up and down.

[0034] Multiple vertical guide rods 9 are fixedly installed on the top of the scraper 7, and the multiple guide rods 9 are evenly distributed at equal intervals along the radial direction of the rotating shaft 5. Each guide rod 9 extends upward through the mounting plate 8 and is in a limiting sliding fit with the mounting plate 8.

[0035] A vibration assembly that causes the scraper 7 to vibrate as it falls is installed in the mounting groove 13 of the mounting plate 8. Specifically, the vibration assembly includes multiple springs 11, each corresponding to a multiple guide rod 9; each spring 11 is sleeved on the corresponding guide rod 9, and each spring 11 is fixedly connected to the scraper 7 and the mounting plate 8.

[0036] A limiting cap is fixedly installed at the top of each guide rod 9, and each limiting cap abuts against the top of the mounting plate 8 for limiting engagement. The drive shaft 12 slides against the top end face of the connecting ring 15.

[0037] Both the connecting ring 15 and the mounting plate 8 have guide slopes on their top surfaces to prevent impurities from accumulating on their top surfaces.

[0038] Working Principle: This embodiment describes the purification of the product after the reaction of trifluoroacetyl chloride preparation as an example. When using this purification device to precipitate and remove impurities from trifluoroacetyl chloride, the trifluoroacetyl chloride gas after the reaction is completed is first sent into an existing pressurized condenser to convert the trifluoroacetyl chloride from a gaseous state to a liquid state. Then, the liquid trifluoroacetyl chloride is injected into the precipitation tank 1 through the feed port 3 via a pipeline. After the injection is completed, precipitation takes place. After precipitation is completed, the control valve opens the discharge pipe 6, and the purified liquid trifluoroacetyl chloride flows out from the discharge pipe 6 and finally flows into the storage tank for storage.

[0039] When material stops flowing from the discharge pipe 6, the motor 2 is started. The output shaft of the motor 2 drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the mounting plate 8 to revolve around the central axis of the rotating shaft 5. The mounting plate 8 pushes the scraper 7 to revolve around the rotating shaft 5, and the scraper 7 pushes the impurities settled on the inner wall of the bottom of the settling tank 1 into the impurity collection box 4. In this embodiment, the impurity collection box 4 is fixed to the settling tank 1 or removed from the settling tank 1 using existing disassembly and assembly methods.

[0040] When scraper 7 revolves around shaft 5, it drives drive shaft 12 to revolve around shaft 5. When drive shaft 12 contacts the drive ramp on drive block 10, drive block 10 pushes scraper 7 upward. During this process, scraper 7 is positioned above impurity collection box 4. As scraper 7 slides upward, mounting plate 8 removes impurities adhering to the impurity surface pushed by scraper 7. At the same time, scraper 7 compresses spring 11.

[0041] As the rotating shaft 5 gradually rotates, the transmission shaft 12 gradually disengages from the transmission block 10. After the transmission shaft 12 disengages from the transmission block 10, under the action of the spring force 11, the scraper 7 slides downward and eventually impacts the bottom inner wall of the settling tank 1. When the scraper 7 impacts the inner wall of the settling tank 1, the scraper 7 vibrates and transmits the vibration to the mounting plate 8. At this time, the impurities adhering to the scraper 7 and the mounting plate 8 are shaken off together into the impurity collection box 4.

[0042] After all impurities have entered the impurity collection box 4, turn off the motor 2. Then, remove the impurity collection box 4 from the sedimentation tank 1 and discard the impurities.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for removing impurities after precipitation of trifluoroacetyl chloride, comprising a precipitation tank (1), characterized in that: A rotating shaft (5) is coaxially mounted inside the sedimentation tank (1), and a motor (2) for driving the rotating shaft (5) is fixedly mounted on the sedimentation tank (1); a mounting plate (8) is fixedly mounted radially on the rotating shaft (5); a downward-facing mounting groove (13) is formed on the mounting plate (8) radially along the rotating shaft (5), and a scraper (7) is slidably mounted in the mounting groove (13); the bottom of the scraper (7) slides in contact with the bottom inner wall of the sedimentation tank (1), and the scraper... The impurity-pushing surface of the plate (7) slides in contact with the mounting plate (8); an upward-pushing assembly for pushing the scraper (7) upward is installed on the bottom inner wall of the sedimentation tank (1); a vibration assembly for causing the scraper (7) to fall and vibrate is installed in the mounting groove (13) of the mounting plate (8); an impurity collection box (4) with its opening facing upward and connected to the sedimentation tank (1) is slidably installed at the bottom of the sedimentation tank (1); the top plane of the impurity collection box (4) is flush with the bottom inner wall of the sedimentation tank (1).

2. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 1, characterized in that: The push-up assembly includes a connecting ring (15), which is sleeved on the rotating shaft (5); the rotating shaft (5) is rotatably connected to the connecting ring (15), and the connecting ring (15) is fixedly connected to the sedimentation tank (1); a transmission block (10) is fixedly provided on the connecting ring (15), and a transmission inclined surface is provided on the transmission block (10) along the circumference of the rotating shaft (5); a transmission shaft (12) is fixedly provided radially at the end of the scraper (7) near the rotating shaft (5), and the transmission shaft (12) and the transmission inclined surface of the transmission block (10) are in contact abutment transmission cooperation.

3. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 2, characterized in that: The mounting plate (8) has an opening at the end near the rotating shaft (5) for the transmission shaft (12) to slide up and down, and the opening is connected to the mounting groove (13).

4. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 2, characterized in that: The top of the scraper (7) is fixedly provided with multiple vertical guide rods (9), which are evenly distributed at equal intervals along the radial direction of the rotating shaft (5); each guide rod (9) extends upward through the mounting plate (8) and is in a limiting sliding fit with the mounting plate (8).

5. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 2, characterized in that: The transmission block (10) corresponds to the impurity collection box (4).

6. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 3, characterized in that: A sealing block (14) is fixedly provided on the top of the drive shaft (12) in the radial direction, and the sealing block (14) seals the opening.

7. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 4, characterized in that: The vibration assembly includes multiple springs (11), each spring (11) corresponding to a multiple guide rod (9); each spring (11) is sleeved on the corresponding guide rod (9), and each spring (11) is fixedly connected to the scraper (7) and the mounting plate (8).

8. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 3, characterized in that: Both the connecting ring (15) and the mounting plate (8) have a guide slope on their top end faces.

9. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 1, characterized in that: The sedimentation tank (1) has a feeding port (3) at the top, and the sedimentation tank (1) is fixed and connected to a discharge pipe (6) on the side. The bottom of the discharge pipe (6) is higher than the bottom inner wall of the sedimentation tank (1).

10. The device for removing impurities after trifluoroacetyl chloride precipitation according to claim 1, characterized in that: The sedimentation tank (1) has a notch for the impurity collection box (4) to slide in and out, and the impurity collection box (4) seals the notch.

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