Potassium hydroxide crystal negative pressure washing device

Abstract

The application provides a potassium hydroxide crystal negative pressure washing device, and relates to the technical field of chemical industry, which comprises a washing container, the upper part of the washing container is provided with a washing liquid inlet and a feeding port, and the lower part of the washing container is provided with a negative pressure interface and a discharge port; the washing liquid inlet is used for guiding the washing liquid to flow in; the feeding port is used for guiding the potassium hydroxide crystal to flow in; a filler plate is arranged in the washing container and located between the washing liquid inlet and the discharge port, the potassium hydroxide crystal can be filled on the filler plate to form a crystal layer, and the filler plate is provided with a plurality of channels for the liquid to pass through; a negative pressure unit is connected with the negative pressure interface and used for generating a negative pressure with adjustable size below the filler plate; and a knocking mechanism is used for knocking the lower side of the filler plate, and the filler plate can transmit the vibration generated due to the knocking to the crystal layer. In the process that the washing liquid passes through the crystal layer, the lower side of the filler plate is knocked, so that the contact between each part of the crystal layer and the washing liquid is more uniform.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to a negative pressure washing device for potassium hydroxide crystals. Background Technology

[0002] Electronic-grade potassium hydroxide is a type of potassium hydroxide with high purity and excellent chemical stability, and it is widely used in high-tech industries such as electronic components, semiconductor manufacturing, photovoltaics, and integrated circuits.

[0003] Patent application CN202420014177.6 discloses a production system for electronic-grade potassium hydroxide and its solution, employing a method for preparing electronic-grade potassium hydroxide solution. This method includes: S1. Filling purified potassium hydroxide crystals into an alkali-resistant corrosion-resistant container to form a crystal layer with a thickness of L cm; S2. Applying a periodically varying negative pressure to the bottom of the crystal layer; S3. Continuously adding washing solution A to the top of the crystal layer and collecting a daily-grade potassium hydroxide solution at the bottom of the crystal layer; When the impurity content of the solution at the bottom outlet of the crystal layer in step S3 is ≤ a set value, proceeding to step S4; S4. Continuously adding washing solution B to the top of the crystal layer and collecting the electronic-grade potassium hydroxide solution at the bottom outlet of the crystal layer; S5. When the thickness of the crystal layer is 1 / 4L to 1 / 2L, continuously adding washing solution C to the top of the crystal layer and collecting solution C at the bottom of the crystal layer. This system can produce stable quality electronic-grade potassium hydroxide and its solution with a high yield.

[0004] The aforementioned system introduces washing liquid into the top of the washing container. Under negative pressure, the washing liquid makes full contact with the crystal layer (with a long contact time), resulting in more thorough washing. This eliminates the need for multiple washes with large amounts of washing liquid to achieve stable and effective removal of impurities. Simultaneously, the system allows for adjustable negative pressure, applying it to the crystal layer in a cyclical manner from high to low. This effectively prevents the formation of fixed liquid flow channels within the crystal layer during washing, ensuring more uniform contact between all parts of the crystal layer and the washing liquid, further preventing substandard or highly fluctuating product quality.

[0005] The purpose of this application is to further avoid forming fixed liquid flow channels in the crystal layer, so as to make the contact between the various parts inside the crystal layer and the washing liquid more uniform. Utility Model Content

[0006] In view of the above situation, this utility model provides a negative pressure washing device for potassium hydroxide crystals, which aims to further avoid the formation of fixed liquid flow channels in the crystal layer, so as to make the contact between various parts inside the crystal layer and the washing liquid more uniform.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a negative pressure washing device for potassium hydroxide crystals, comprising:

[0009] The washing container has a washing liquid inlet and a feed inlet at the top, and a negative pressure interface and a discharge interface at the bottom; the washing liquid inlet is used to introduce washing liquid; the feed inlet is used to introduce potassium hydroxide crystals.

[0010] A packing plate is installed inside the washing container and located between the washing liquid inlet and the discharge port. Potassium hydroxide crystals can be filled on the packing plate to form a crystal layer. The packing plate has channels for the liquid to pass through.

[0011] The negative pressure unit, connected to the negative pressure interface, is used to generate an adjustable negative pressure below the packing plate;

[0012] The striking mechanism is used to strike the underside of the packing plate, which transmits the vibrations generated by the striking to the crystal layer.

[0013] In some embodiments of this utility model, a spray head is connected to the washing liquid inlet.

[0014] In some embodiments of this utility model, the striking mechanism includes:

[0015] The bracket is fixed to the lower inner wall of the washing container;

[0016] A fixing cylinder is fixed to the bracket;

[0017] The striking rod is vertically slidably connected to the fixed cylinder at its lower part;

[0018] A drive assembly for vertically moving the striking lever.

[0019] In some embodiments of this utility model, the fixed cylinder has a cavity, and the lower part of the striking rod has a movable plug, which is vertically and slidably sealed to the cavity.

[0020] In some embodiments of this utility model, the driving component includes:

[0021] A tension spring is used to move the striking rod upwards;

[0022] The air duct is connected at one end to the bottom of the cavity and at the other end, which is sealed and passes through the side wall of the washing container before connecting to the negative pressure unit.

[0023] In some embodiments of this invention, the air duct is connected to the negative pressure unit via a buffer tank.

[0024] In some embodiments of this utility model, it further includes:

[0025] The first discharge valve is connected to the discharge port;

[0026] The second discharge valve is connected to the discharge port and is connected in parallel with the first discharge valve;

[0027] Microwave level gauge, used to measure the thickness of crystal layers;

[0028] The first discharge valve and the second discharge valve are both associated with microwave level gauges.

[0029] In some embodiments of this utility model, the feed inlet is connected to a manual filling port and an automatic filling port, and the automatic filling port is connected to a spiral feeding pipe.

[0030] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0031] 1. During the process of the washing liquid passing through the crystal layer, tapping the lower side of the packing plate will slightly move the potassium hydroxide crystals in the crystal layer. This can further prevent the formation of fixed liquid flow channels in the crystal layer during the washing process, making the contact between the various parts inside the crystal layer and the washing liquid more uniform.

[0032] Second, during the process of filling potassium hydroxide crystals onto the packing plate through the feed inlet to form a crystal layer, the tapping action of the tapping mechanism can be used to make the potassium hydroxide crystals evenly distributed on the packing plate. This also makes the contact between the various parts inside the crystal layer and the washing liquid more uniform.

[0033] Third, the striking action of the striking mechanism can also help to clear the channels on the packing plate.

[0034] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of a negative pressure washing device for potassium hydroxide crystals;

[0037] Figure 2 for Figure 1 A magnified view of a portion of position A in the middle.

[0038] Icons: 1-Washing container, 11-Washing liquid inlet, 12-Feeding port, 13-Negative pressure interface, 14-Discharge interface, 2-Packing plate, 3-Negative pressure unit, 4-Striking mechanism, 41-Bracket, 42-Fixed cylinder, 421-Cavity, 43-Striking rod, 431-Striking head, 432-Modible plug, 44-Tension spring, 45-Air guide pipe, 46-Buffer tank, 51-First discharge valve, 52-Second discharge valve, 53-Microwave level gauge, 61-Manual filling port, 62-Automatic filling port. Detailed Implementation

[0039] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0040] In the description of the embodiments of this utility model, it should be understood that the terms "thickness", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0043] The embodiments of this utility model will be described in detail below.

[0044] See Figures 1-2 This embodiment provides a negative pressure washing device for potassium hydroxide crystals, including a washing container 1, a packing plate 2, a negative pressure unit 3, and a striking mechanism 4.

[0045] The washing container 1 has a washing liquid inlet 11 and a feed port 12 at the top, and a negative pressure port 13 and a discharge port 14 at the bottom. The washing liquid inlet 11 is used to introduce the washing liquid for washing potassium hydroxide crystals (ultrapure water and / or low potassium solution with impurity content lower than that required for electronic grade potassium hydroxide and concentration lower than 48w%). The washing liquid inlet 11 is connected to a spray head. The feed port 12 is used to introduce potassium hydroxide crystals.

[0046] The packing plate 2 is disposed inside the washing container 1 and located between the washing liquid inlet 11 and the discharge port 14. Potassium hydroxide crystals can be filled on the packing plate 2 to form a crystal layer. The packing plate 2 has channels for liquid to pass through (not shown in the figure).

[0047] The negative pressure unit 3 is connected to the negative pressure interface 13, and the negative pressure unit 3 can generate an adjustable negative pressure below the packing plate 2.

[0048] The striking mechanism 4 is installed inside the washing container 1 and is used to strike the lower side of the packing plate 2. The packing plate 2 can transmit the vibration generated by the striking to the crystal layer.

[0049] This device is mainly used for the production of electronic-grade potassium hydroxide solid. During operation, purified potassium hydroxide crystals are loaded onto the packing plate 2 in the washing container 1 through the feed inlet 12 to form a crystal layer. A negative pressure unit 3 provides a certain negative pressure to the lower part of the washing container 1. The washing liquid enters the washing container 1 through the washing liquid inlet 11 and is sprayed onto the crystal layer through the spray head. After passing through the crystal layer, the resulting solution is discharged through the discharge port 14, thus producing electronic-grade potassium hydroxide solid. The negative pressure can be adjusted by changing the operating state of the negative pressure unit 3, allowing the negative pressure to be applied to the crystal layer in a cyclical manner from large to small. This effectively avoids the formation of fixed liquid flow channels in the crystal layer during washing, resulting in more uniform contact between the various parts of the crystal layer and the washing liquid.

[0050] In addition, the setting of the striking mechanism 4 has the following advantages:

[0051] 1. During the process of the washing liquid passing through the crystal layer, tapping the lower side of the packing plate 2 will cause the potassium hydroxide crystals in the crystal layer to move slightly. This can further prevent the formation of fixed liquid flow channels in the crystal layer during the washing process, and make the contact between the various parts inside the crystal layer and the washing liquid more uniform.

[0052] Second, during the process of filling potassium hydroxide crystals onto the packing plate 2 through the feed inlet 12 to form a crystal layer, the tapping action of the tapping mechanism 4 can be used to make the potassium hydroxide crystals evenly distributed on the packing plate 2. In this way, the contact between the various parts inside the crystal layer and the washing liquid can be more uniform.

[0053] Third, the striking action of the striking mechanism 4 can also help to clear the holes on the packing plate 2.

[0054] The striking mechanism 4 includes a bracket 41, a fixed cylinder 42, a striking rod 43, and a drive assembly.

[0055] The bracket 41 is fixed to the lower inner wall of the washing container 1.

[0056] The fixing cylinder 42 is fixed on the bracket 41.

[0057] The lower part of the striking rod 43 is vertically slidably connected to the fixed cylinder 42, and the upper end of the striking rod 43 has a striking head 431.

[0058] The drive assembly is used to move the striking lever 43 vertically.

[0059] The working principle of the above-mentioned striking mechanism 4 is as follows: the striking rod 43 is moved vertically by the driving component, so that the striking head 431 of the striking rod 43 comes into contact with or separates from the lower side of the packing plate 2, thereby striking the packing plate 2 by the striking rod 43 and the striking head 431.

[0060] In a specific implementation scenario, the drive components include a tension spring 44, an air duct 45, and a buffer tank 46.

[0061] The fixed cylinder 42 has a cavity 421, and the lower part of the striking rod 43 has a movable plug 432. The movable plug 432 is vertically slidably sealed to the cavity 421. The tension spring 44 is located in the cavity 421 and above the movable plug 432, and is used to move the movable plug 432 and the striking rod 43 upward.

[0062] One end of the air duct 45 is connected to the bottom of the cavity 421, and the other end is sealed and passes through the side wall of the washing container 1 before being connected to the negative pressure unit 3 via the buffer tank 46.

[0063] The lower part of cavity 421, air guide pipe 45, buffer tank 46, and negative pressure unit 3 are connected in sequence. In this way, when the working state of negative pressure unit 3 is changed to adjust the negative pressure in the lower part of washing container 1, a changing negative pressure will also be formed in the lower part of cavity 421 of fixed cylinder 42. When the negative pressure in the lower part of cavity 421 is insufficient to pull down the movable plug 432, the movable plug 432, the striking rod 43 and the striking head 431 will move upward under the action of the restoring force of tension spring 44 and strike the lower side of packing plate 2.

[0064] The negative pressure washing device for potassium hydroxide crystals also includes a first discharge valve 51, a second discharge valve 52, and a microwave level gauge 53.

[0065] The first discharge valve 51 is connected to the discharge port 14.

[0066] The second discharge valve 52 is connected to the discharge port 14 and is connected in parallel with the first discharge valve 51.

[0067] The microwave level gauge 53 is installed on top of the washing container 1 to measure the thickness of the crystal layer in real time.

[0068] Both the first discharge valve 51 and the second discharge valve 52 are associated with the microwave level gauge 53. Initially, the first discharge valve 51 is open and the second discharge valve 52 is closed; when the thickness of the crystal layer decreases to a predetermined value, the first discharge valve 51 closes and the second discharge valve 52 opens. That is, similar to existing technologies, different discharge paths are switched according to the saturation level of the solution.

[0069] The feed inlet 12 is connected to a manual filling port 61 and an automatic filling port 62. The manual filling port 61 is used for manual filling; the automatic filling port 62 is connected to a spiral feeding pipe (not shown in the figure) to achieve automatic feeding and automatic filling. This provides both manual and automatic filling modes, which can be switched as needed (manual mode is suitable for small-scale production, and automatic filling mode is suitable for large-scale production). The significance of switching between manual and automatic modes also lies in the ability to compare and study whether different filling methods affect the stability of the crystal layer under negative pressure, and to analyze whether the crystal layer will loosen or accumulate unevenly due to changes in negative pressure, thereby affecting the washing effect.

[0070] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A negative pressure washing device for potassium hydroxide crystals, characterized in that, include: A washing container has a washing liquid inlet and a feed port at the top, and a negative pressure port and a discharge port at the bottom; the washing liquid inlet is used to introduce washing liquid. The feed inlet is used to introduce potassium hydroxide crystals; A packing plate is disposed inside the washing container and located between the washing liquid inlet and the discharge port. Potassium hydroxide crystals can be filled on the packing plate to form a crystal layer. The packing plate has channels for liquid to pass through. A negative pressure unit, connected to the negative pressure interface, is used to generate an adjustable negative pressure below the packing plate; A striking mechanism is used to strike the underside of the packing plate, which transmits the vibration generated by the striking to the crystal layer.

2. The negative pressure washing device for potassium hydroxide crystals according to claim 1, characterized in that, The washing liquid inlet is connected to a spray head.

3. The negative pressure washing device for potassium hydroxide crystals according to claim 1, characterized in that, The striking mechanism includes: A bracket is fixed to the lower inner wall of the washing container; A fixing cylinder is fixed to the bracket; The striking rod is vertically slidably connected to the fixed cylinder at its lower part; A drive assembly for vertically moving the striking rod.

4. The negative pressure washing device for potassium hydroxide crystals according to claim 3, characterized in that, The fixed cylinder has a cavity, and the lower part of the striking rod has a movable plug, which is vertically and slidably sealed to the cavity.

5. The negative pressure washing device for potassium hydroxide crystals according to claim 4, characterized in that, The driving component includes: A tension spring is used to move the striking rod upwards; The air duct is connected at one end to the bottom of the cavity and at the other end, which is sealed and passes through the side wall of the washing container before being connected to the negative pressure unit.

6. The negative pressure washing device for potassium hydroxide crystals according to claim 5, characterized in that, The air duct is connected to the negative pressure unit via a buffer tank.

7. The negative pressure washing device for potassium hydroxide crystals according to any one of claims 1 to 6, characterized in that, Also includes: The first discharge valve is connected to the discharge port; The second discharge valve is connected to the discharge port and is connected in parallel with the first discharge valve; A microwave level gauge is used to measure the thickness of the crystal layer; The first discharge valve and the second discharge valve are both associated with the microwave level gauge.

8. The negative pressure washing device for potassium hydroxide crystals according to any one of claims 1 to 6, characterized in that, The feed inlet is connected to a manual filling port and an automatic filling port, and the automatic filling port is connected to a spiral feeding pipe.

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