Tetramethylammonium hydroxide solid crystal stirrer

Abstract

The utility model provides a tetramethylammonium hydroxide solid crystal stirrer which comprises a tank body, a spiral stirring blade is arranged in the tank body, the section contour of the stirring blade is crescent, a stirring shaft is arranged in the middle of the stirring blade in a penetrating mode, the upper end of the stirring shaft is fixedly connected with a connecting ring, and the connecting ring is fixedly connected with the stirring blade. A groove is formed in the upper end of the connecting ring, an upper cover is fixedly connected to the upper end of the tank body, a connecting piece is fixedly connected to the upper end of the upper cover, a driving motor is fixedly connected to the upper end of the connecting piece, a rotating disc is fixedly connected to a motor shaft of the driving motor, and a plurality of protruding blocks are arranged at the lower end of the rotating disc; and the groove is matched with the convex block. The stirring structure is simple, the driving motor is easy to disassemble, and maintenance and replacement are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of stirrers, in particular to a tetramethylammonium hydroxide solid crystal stirrer. Background Art

[0002] Tetramethylammonium hydroxide (TMAH) is an important organic base. A strong base with the same strength as caustic soda, it leaves no residue after thermal decomposition, particularly no conductive ions. Consequently, it is widely used in the electronics industry. It is often used as a cleaning, etching, and polishing agent for integrated circuit boards. It can also serve as a catalyst in the synthesis of organosilicon products such as silicone rubber, silicone resin, and silicone oil. With the continuous development of large-scale integrated circuits, the demand for TMAH is increasing.

[0003] Currently, tetramethylammonium hydroxide is produced through precipitation, ion exchange resin, addition, ion membrane, and ion membrane electrolysis. During the production process, tetramethylammonium hydroxide is crystallized to obtain a solid product. Stirring during the crystallization process ensures uniform heating of the solution and uniform crystal size.

[0004] The stirring structure in patent application number "CN201520767883.9" includes stirring blades, cross bars, scrapers, breaking plates, etc., which is relatively complex as a whole and not conducive to maintenance and replacement. In addition, the stirring blades are in a vertical position, and the homogenization effect on the upper and lower layers of the solution inside the tank is not obvious. Summary of the Invention

[0005] To address the above-mentioned problems, the present invention discloses a tetramethylammonium hydroxide solid crystallization mixer, comprising a tank body, wherein stirring blades are disposed within the tank body. The stirring blades are spiral-shaped and have a crescent-shaped cross-sectional profile. A plurality of stirring blades are provided, each having a crescent-shaped cross-sectional profile with a concave arc on the inside. When rotating, the stirring blades "scoop" the solution upward, achieving convection between the upper and lower solutions. Furthermore, the stirring structure is simple and not easily damaged.

[0006] A stirring shaft is inserted into the middle of the stirring blade, and a connecting ring is fixedly connected to the upper end of the stirring shaft, and a groove is provided at the upper end of the connecting ring. The upper end of the tank body is fixedly connected to the upper cover, and a connecting piece is fixedly connected to the upper end of the upper cover. The upper end of the connecting piece is fixedly connected to the drive motor, and the motor shaft of the drive motor is fixedly connected to a rotating disk. The lower end of the rotating disk is provided with a plurality of protrusions, and the grooves and protrusions cooperate. When the drive motor is started, the stirring blade is rotated through the rotating disk, the connecting ring, and the stirring shaft, thereby achieving the effect of stirring the material. At the same time, the rotating disk and the connecting ring are connected by the matching groove and protrusion, which is faster and more convenient when disassembling the drive motor.

[0007] Preferably, a heating chamber is provided on the lower side wall of the tank body, and a heating pipe is provided inside the heating chamber. After the heating tank is arranged in the heating chamber, the gap in the heating chamber is filled with a heat-conducting material. It is noted that the heating pipe can be filled with an electric heating wire, or the material inside the tank body can be heated by introducing a heat medium, so that the solvent therein evaporates and tetramethylammonium hydroxide precipitates and crystallizes.

[0008] Preferably, the lower end of the tank body is fixedly connected to a discharge pipe, and the upper end of the upper cover is fixedly connected to a feed pipe, that is, the tetramethylammonium hydroxide solution system is fed into the interior of the tank body through the feed pipe, then subjected to evaporation and crystallization treatment, and finally discharged from the discharge pipe.

[0009] Preferably, a nut is threaded onto the upper end of the agitator shaft, with the lower end of the nut resting against the connecting ring. This allows the agitator shaft to be "hung" on the connecting ring via the nut. Note that a keyway is provided between the upper end of the agitator shaft and the connecting plate to ensure that the agitator shaft rotates with the connecting ring. This design facilitates removal of the agitator blade and agitator shaft from the upper cover, facilitating maintenance and replacement.

[0010] Preferably, a plurality of support legs are fixedly connected to the lower end of the tank body for supporting and fixing the tank body, and a threaded column is provided at the lower part of the support legs to facilitate adjustment of the support height.

[0011] Preferably, the upper end of the upper cover is fixedly connected with a first pipe opening and a second pipe opening. The first pipe opening and the second pipe opening are used to discharge the evaporated solvent, and during the evaporation crystallization operation, only one is used for gas discharge, and the other is reserved for installing a temperature sensor, a pressure sensor, etc.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The stirring blade is spiral-shaped and its cross-section is crescent-shaped, that is, the inner side is a concave arc. During the rotation process, this structure can realize the flow of upper and lower layer solutions and improve the stirring effect. The structure of the stirring blade is simple and not easy to be damaged.

[0014] 2. A rotating disk and a connecting ring are provided between the driving motor and the stirring shaft, and the rotating disk and the connecting ring are matched with each other by means of grooves and protrusions. This connection method is that the driving motor is easy to disassemble and separate, which is beneficial to the maintenance of the mixer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the connection structure of the drive motor of the present invention;

[0018] Figure 4 It is a schematic diagram of the stirring blade structure of the present invention.

[0019] List of reference numerals:

[0020] 1. Support legs; 2. Tank body; 3. Upper cover; 4. First nozzle; 5. Second nozzle; 6. Connector; 7. Feed pipe; 8. Drive motor; 9. Discharge pipe; 10. Heating pipe; 11. Heating chamber; 12. Stirring blade; 13. Groove; 14. Connecting ring; 15. Nut; 16. Bump; 17. Rotating disk; 18. Stirring shaft. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0022] like Figures 1 to 4 As shown, a tetramethylammonium hydroxide solid crystallization mixer includes a tank body 2, which is a cylindrical structure. A stirring blade 12 is disposed inside the tank body 2. The stirring blade 12 is spiral-shaped and has a crescent-shaped cross-sectional profile. Multiple stirring blades 12 are provided, and a fixing frame is provided at each end. The stirring blade 12, which has a crescent-shaped cross-sectional profile, has a concave arc on the inside. During the rotation of the stirring blade 12, the solution inside the tank body 2 is stirred, providing conditions for the crystallization of tetramethylammonium hydroxide.

[0023] The middle part of the stirring blade 12 is interspersed with a stirring shaft 18, that is, the stirring blade 12 rotates with the stirring shaft 18, the upper end of the stirring shaft 18 is fixedly connected to the connecting ring 14, the upper end of the connecting ring 14 is provided with a groove 13, the upper end of the tank body 2 is fixedly connected to the upper cover 3, the edge of the upper cover 3 is fixedly connected to the tank body 2 by a number of bolts, the upper end of the stirring shaft 18 passes through the upper cover 3, and a sealing ring is provided between the stirring shaft 18 and the upper cover 3, and the connecting ring 14 is provided above the upper cover 3. 3 is fixedly connected to the upper end of the connecting member 6, which is also fixedly connected to the upper cover 3 by a number of bolts. The upper end of the connecting member 6 is fixedly connected to the drive motor 8, and the motor shaft of the drive motor 8 is fixedly connected to the rotating disk 17. The lower end of the rotating disk 17 is provided with a number of protrusions 16. The grooves 13 and the protrusions 16 cooperate. When the drive motor 8 is started, the rotating disk 17 and the rotating ring 14 rotate through the cooperation of the grooves 13 and the protrusions 16, thereby realizing the rotation of the stirring blade 12, that is, stirring the internal solvent of the tank body 2. The power connection method here through the rotating disk 17 and the rotating ring 14 is that the disassembly of the drive motor 8 is more convenient.

[0024] A heating chamber 11 is provided on the lower sidewall of the tank 2. This chamber 11 is suitable for use with a strip-shaped workpiece and the lower sidewall of the tank 2. A heating tube 10 is installed within the heating chamber 11. After the heating tube 10 is installed, the gap needs to be filled. Furthermore, an electric heating element such as an electric heating wire can be installed within the heating tube 10, or a heat medium can be directly introduced into the heating tube 10 to provide heat for the crystallization of tetramethylammonium hydroxide.

[0025] The lower end of the tank body 2 is fixedly connected to a discharge pipe 9 for discharging the crystallized tetramethylammonium hydroxide. The upper end of the upper cover 3 is fixedly connected to a feed pipe 7 for feeding tetramethylammonium hydroxide into the tank body 2 .

[0026] The upper end of the stirring shaft 18 is threadedly connected with a nut 15, and the lower end of the nut 15 is against the connecting ring 14. By rotating and removing the nut 15, the stirring shaft 18 can be separated from the upper cover 3. That is, this connection method can quickly realize the disassembly of the stirring shaft 18, which is convenient for maintenance and replacement.

[0027] The lower end of the tank body 2 is fixedly connected with a plurality of support legs 1. The lower part of the support leg 1 is threadedly connected with a column, and the overall support height of the support leg 1 can be adjusted by rotating the column.

[0028] The upper end of the upper cover 3 is fixedly connected to a first nozzle 4 and a second nozzle 5. The first nozzle 4 and the second nozzle 5 are used to discharge the gas solvent. During the crystallization process, only one of the first nozzle 4 and the second nozzle 5 is used, and the other is used as a backup or for installing a temperature sensor or pressure sensor.

[0029] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A tetramethylammonium hydroxide solid crystallization mixer, characterized in that: It comprises a tank body (2), wherein a stirring blade (12) is provided inside the tank body (2), and the stirring blade (12) is spiral-shaped and has a crescent-shaped cross-sectional profile; A stirring shaft (18) is inserted into the middle of the stirring blade (12), the upper end of the stirring shaft (18) is fixedly connected to a connecting ring (14), the upper end of the connecting ring (14) is provided with a groove (13), the upper end of the tank body (2) is fixedly connected to an upper cover (3), the upper end of the upper cover (3) is fixedly connected to a connecting member (6), the upper end of the connecting member (6) is fixedly connected to a driving motor (8), the motor shaft of the driving motor (8) is fixedly connected to a rotating disk (17), the lower end of the rotating disk (17) is provided with a plurality of protrusions (16), and the grooves (13) and the protrusions (16) cooperate.

2. A tetramethylammonium hydroxide solid crystallization mixer according to claim 1, characterized in that: A heating chamber (11) is provided on the lower side wall of the tank body (2), and a heating pipe (10) is provided inside the heating chamber (11).

3. A tetramethylammonium hydroxide solid crystallization mixer according to claim 1, characterized in that: The lower end of the tank body (2) is fixedly connected to a discharge pipe (9), and the upper end of the upper cover (3) is fixedly connected to a feed pipe (7).

4. A tetramethylammonium hydroxide solid crystallization mixer according to claim 1, characterized in that: The upper end of the stirring shaft (18) is threadedly connected to a nut (15), and the lower end of the nut (15) abuts against the connecting ring (14).

5. A tetramethylammonium hydroxide solid crystallization mixer according to claim 1, characterized in that: A plurality of supporting legs (1) are fixedly connected to the lower end of the tank body (2).

6. A tetramethylammonium hydroxide solid crystallization mixer according to claim 1, characterized in that: The upper end of the upper cover (3) is fixedly connected to a first pipe opening (4) and a second pipe opening (5).

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