Phosphoric acid dilution device

Abstract

The application provides a phosphoric acid diluting device, which comprises a diluting tank, a concentrated phosphoric acid tank connected with the diluting tank, a liquid level gauge connected with the diluting tank, a distributor arranged in the diluting tank and capable of uniformly distributing pure water at the bottom of the diluting tank, a driving mechanism connected with the distributor and capable of driving the rotation of the distributor and stirring the pure water and the concentrated phosphoric acid, a water inlet box sealingly and rotatably connected with the distributor and fixed at the upper end of the diluting tank, and a pure water tank connected with the water inlet box. The application can pre-mix the pure water and the concentrated phosphoric acid while adding the pure water, shorten the stirring and diluting time, and further shorten the whole phosphoric acid diluting time, and improve the diluting efficiency of the phosphoric acid.

Description

Technical Field

[0001] This application relates to phosphoric acid dilution technology, and more particularly to a phosphoric acid dilution apparatus. Background Technology

[0002] During the production of hydrogen peroxide, dilute phosphoric acid (40%~50% by mass) needs to be added at several points to make the solution acidic, preventing hydrogen peroxide from decomposing in the presence of alkali and causing accidents. The dilute phosphoric acid is made by diluting concentrated phosphoric acid (75% or 85% by mass) with pure water.

[0003] Currently, a common phosphoric acid dilution device includes a concentrated phosphoric acid tank, a pure water tank, and a dilution tank. Both the concentrated phosphoric acid tank and the pure water tank are connected to the dilution tank, which is equipped with a stirring mechanism and a level gauge. In operation, concentrated phosphoric acid from the concentrated phosphoric acid tank is first transferred directly to the dilution tank, and the amount added is determined by the level gauge. Then, pure water from the pure water tank is transferred directly to the dilution tank, and the amount added is also determined by the level gauge. Finally, the device is stirred and diluted using the stirring mechanism. However, this method of adding concentrated phosphoric acid and pure water sequentially before stirring and dilution results in a long overall phosphoric acid dilution process and low dilution efficiency. Utility Model Content

[0004] This application provides a phosphoric acid dilution device to solve the problems of long dilution time and low dilution efficiency in existing phosphoric acid dilution methods.

[0005] This application provides a phosphoric acid dilution device, including a dilution tank connected to a concentrated phosphoric acid tank and a level gauge connected to the dilution tank; The dilution tank is equipped with a distributor that can evenly distribute pure water at the bottom of the tank. The distributor is connected to a drive mechanism that can rotate it and stir pure water and concentrated phosphoric acid. The distributor is rotatably and sealed to a water inlet tank that is connected to and fixed to the upper end of the dilution tank, and the water inlet tank is connected to a pure water tank.

[0006] Optionally, the distributor includes a hollow shaft, the lower end of which is fixed with a plurality of stirring blades located at the bottom of the dilution tank. The stirring blades are hollow and communicate with the hollow shaft, and the stirring blades are provided with a group of water distribution holes. The hollow shaft passes through the water inlet tank and is rotatably and sealed to the water inlet tank. The hollow shaft is connected to the water inlet tank and is also connected to the drive mechanism.

[0007] Optionally, the water distribution hole group is arranged around the stirring blade and distributed radially along the dilution tank.

[0008] Optionally, the drive mechanism includes a support fixed to the upper end of the water inlet tank, a motor fixed on the support, and the output shaft of the motor connected to a hollow shaft via a coupling.

[0009] Optionally, the inside of the dilution tank is fixed with a sleeve that is fitted onto a hollow shaft and forms an annular gap with the hollow shaft, and the inside of the annular gap is provided with a spiral blade fixed on the hollow shaft. The sleeve has a set of liquid inlet holes distributed on the upper part of the spiral blades.

[0010] Optionally, the lower end of the dilution tank is connected to a dilute phosphoric acid tank via a valve.

[0011] The phosphoric acid dilution device provided in this application includes a concentrated phosphoric acid tank connected to a dilution tank, which is connected to a remote level gauge. Inside the dilution tank is a distributor that evenly distributes pure water at the bottom. The distributor is connected to a drive mechanism that rotates and stirs the pure water and concentrated phosphoric acid. The distributor is rotatably and sealed to an inlet tank fixed to the top of the dilution tank, and the inlet tank is connected to a pure water tank. During use, concentrated phosphoric acid is first added to the dilution tank, and the amount added is determined by the level gauge. Then, pure water is added to the dilution tank via the distributor, and the amount added is determined by the level gauge. When adding pure water, the distributor ensures that the pure water is evenly mixed with the concentrated phosphoric acid for pre-mixing. After all the pure water has been added, the distributor stirs and dilutes the phosphoric acid. Compared to existing phosphoric acid dilution methods, this method allows for pre-mixing of pure water and concentrated phosphoric acid simultaneously, shortening the time required for stirring and dilution, thereby reducing the overall dilution time and improving the dilution efficiency of phosphoric acid. Attached Figure Description

[0012] 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 or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the phosphoric acid dilution device provided in the embodiments of this application; Figure 2 This is a partial front view cross-sectional structural diagram of the phosphoric acid dilution device provided in the embodiments of this application; Figure 3 for Figure 2 A magnified structural diagram of region A; Figure 4 A partial three-dimensional structural diagram of the phosphoric acid dilution device provided in the embodiments of this application. Figure I ; Figure 5 A partial three-dimensional structural diagram of the phosphoric acid dilution device provided in the embodiments of this application. Figure II.

[0014] Explanation of reference numerals in the attached drawings: 1. Dilution tank; 2. Concentrated phosphoric acid tank; 3. Level gauge; 4. Phosphoric acid delivery pipe; 5. Phosphoric acid pump; 6. Distributor; 601. Hollow shaft; 602. Stirring blade; 603. Water distribution hole group; 604. Connecting hole; 7. Drive mechanism; 701. Support; 702. Motor; 703. Coupling; 8. Water inlet tank; 9. Pure water tank; 10. Pure water delivery pipe; 11. Water pump; 12. Sleeve; 13. Spiral blade; 14. Liquid inlet hole group; 15. Dilute phosphoric acid tank. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0016] like Figures 1-5 As shown: An embodiment of this application provides a phosphoric acid dilution device, including a dilution tank 1, a concentrated phosphoric acid tank 2 connected to the dilution tank 1, the concentrated phosphoric acid tank 2 storing concentrated phosphoric acid, and a level gauge 3 connected to the dilution tank 1.

[0017] Specifically, the bottom of the concentrated phosphoric acid tank 2 is connected to the top of the dilution tank 1 through a phosphoric acid delivery pipe 4, and a phosphoric acid pump 5 is installed on the phosphoric acid delivery pipe 4.

[0018] Furthermore, level gauge 3 adopts a remote level gauge, which is existing technology and will not be described in detail.

[0019] The interior of the dilution tank 1 is equipped with a distributor 6 that can evenly distribute pure water at the bottom of the dilution tank 1.

[0020] The distributor 6 is connected to a drive mechanism 7 that can rotate it and stir pure water and concentrated phosphoric acid.

[0021] The distributor 6 is rotatably connected to a water inlet tank 8 that is connected to it and fixed to the upper end of the dilution tank 1. The water inlet tank 8 is connected to a pure water tank 9, which stores pure water.

[0022] Specifically, the bottom of the pure water tank 9 is connected to the inlet tank 8 through a pure water delivery pipe 10, and a water pump 11 is installed on the pure water delivery pipe 10.

[0023] In use, first start the phosphoric acid pump 5. The phosphoric acid pump 5 draws concentrated phosphoric acid from the concentrated phosphoric acid tank 2 into the dilution tank 1 through the phosphoric acid delivery pipe 4. The amount of concentrated phosphoric acid added is determined by the level gauge 3. Once the required amount of concentrated phosphoric acid has been added to the dilution tank 1, the phosphoric acid pump 5 is turned off, and the water pump 11 is started. The water pump 11 draws pure water from the pure water tank 9 into the inlet tank 8 through the pure water delivery pipe 10. The pure water in the inlet tank 8 enters the distributor 6, which uniformly mixes with the concentrated phosphoric acid for premixing. The amount of pure water added is determined by the level gauge 3. Once the required amount of pure water has been added to the dilution tank 1, the water pump 11 is turned off, and then the drive mechanism 7 is started. The drive mechanism 7 drives the distributor 6 to rotate. While rotating, the distributor 6 stirs the premixed solution of pure water and concentrated phosphoric acid, thoroughly mixing the pure water and concentrated phosphoric acid to form a uniformly concentrated dilute phosphoric acid solution. The phosphoric acid dilution device provided in this embodiment has a distributor 6 inside the dilution tank 1 that can evenly distribute pure water at the bottom of the dilution tank 1 and can rotate. This allows the pure water to be premixed with concentrated phosphoric acid while adding pure water, shortening the time required for stirring and dilution, thereby shortening the time required for the entire phosphoric acid dilution process and improving the dilution efficiency of phosphoric acid.

[0024] In some embodiments of this application, the distributor 6 includes a hollow shaft 601, and a plurality of stirring blades 602 located at the bottom of the dilution tank 1 are fixed at the lower end of the hollow shaft 601. The stirring blades 602 have a hollow structure and are connected to the hollow shaft 601. A water distribution hole group 603 is provided on the stirring blades 602.

[0025] Specifically, the stirring blade 602 is a hollow structure with one end open. The open end of the stirring blade 602 is connected to the hollow cavity of the hollow shaft 601, and the open end of the stirring blade 602 is sealed and fixedly connected to the hollow shaft 601.

[0026] The hollow shaft 601 passes through the water inlet tank 8 and is rotatably and sealed to the water inlet tank 8. The hollow shaft 601 is connected to the water inlet tank 8 and is also connected to the drive mechanism 7.

[0027] Specifically, the hollow shaft 601 is sealed and rotatably connected to the upper and lower ends of the water inlet tank 8 by two sealed bearings respectively. The hollow shaft 601 has a connecting hole 604, which connects the water inlet tank 8 and the hollow shaft 601.

[0028] In this embodiment, a suitable model of water pump 11 and inner diameter of pure water delivery pipe 10 are selected according to the actual situation, so that under the action of water pump 11 pressurization and pure water delivery pipe 10 water flow, pure water can fill water inlet tank 8, hollow shaft 601 and all stirring blades 602, and pure water can enter concentrated phosphoric acid at a certain pressure.

[0029] When in use, after pure water enters the water inlet tank 8, the pure water enters the hollow shaft 601 through the connecting hole 604 and simultaneously enters all the stirring blades 602 along the hollow shaft 601. Then, all the water distribution hole groups 603 spray the pure water evenly into the concentrated phosphoric acid.

[0030] In some embodiments of this application, the water distribution hole group 603 is arranged around the stirring blade 602 and radially distributed along the dilution tank 1, so that pure water can enter the concentrated phosphoric acid from different directions, thereby improving the premixing effect of pure water and concentrated phosphoric acid.

[0031] Specifically, the stirring blade 602 has a rectangular plate structure, and the water distribution hole group 603 is evenly distributed on the four end faces of the stirring blade 602 along the radial distribution of the dilution tank 1.

[0032] In some embodiments of this application, the drive mechanism 7 includes a support 701 fixed to the upper end of the water inlet tank 8, a motor 702 fixed on the support 701, and the output shaft of the motor 702 connected to the hollow shaft 601 through a coupling 703. The output shaft of the motor 702 drives the hollow shaft 601 to rotate through the coupling 703, and the hollow shaft 601 drives all the stirring blades 602 to rotate synchronously with it to carry out stirring and dilution work.

[0033] In some embodiments of this application, a sleeve 12 is fixed inside the dilution tank 1, which is sleeved on the hollow shaft 601 and forms an annular gap with the hollow shaft 601. The annular gap is provided with a spiral blade 13 fixed on the hollow shaft 601.

[0034] The sleeve 12 has a set of liquid inlet holes 14 distributed on the upper part of the spiral blade 13.

[0035] Furthermore, the liquid inlet hole group 14 is arranged in a ring on the sleeve 12.

[0036] In this embodiment, after the helical blade 13 rotates with the hollow shaft 601, the helical blade 13 pushes the mixture in the annular gap downward.

[0037] In use, after the hollow shaft 601 rotates, the hollow shaft 601 drives the spiral blade 13 to rotate synchronously. While rotating, the spiral blade 13 pushes the mixture downward in the annular gap. At the same time, the mixture located at the inlet hole group 14 in the dilution tank 1 enters the annular gap from the inlet hole group 14 and flows downward along the annular gap to the bottom of the dilution tank 1. When the spiral blade 13 continues to rotate, it can make the mixture in the dilution tank 1 circulate up and down while the distributor 6 is stirring and diluting, thereby improving the stirring and dilution efficiency.

[0038] In some embodiments of this application, the lower end of the dilution tank 1 is connected to a dilute phosphoric acid tank 15 via a valve for collecting and temporarily storing dilute phosphoric acid.

[0039] In some embodiments of this application, those skilled in the art can design corresponding automatic control systems based on common knowledge in the art, technical manuals and other existing technologies to realize the automatic dilution of phosphoric acid.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A phosphoric acid dilution device, comprising a dilution tank (1), wherein the dilution tank (1) is connected to a concentrated phosphoric acid tank (2), and the dilution tank (1) is connected to a level gauge (3), characterized in that: The inside of the dilution tank (1) is equipped with a distributor (6) that can evenly distribute pure water at the bottom of the dilution tank (1); The distributor (6) is connected to a drive mechanism (7) that can drive it to rotate and stir pure water and concentrated phosphoric acid. The distributor (6) is rotatably connected to a water inlet tank (8) that is connected to it and fixed to the upper end of the dilution tank (1), and the water inlet tank (8) is connected to a pure water tank (9).

2. The phosphoric acid dilution apparatus according to claim 1, characterized in that: The distributor (6) includes a hollow shaft (601), and a plurality of stirring blades (602) located at the bottom of the dilution tank (1) are fixed at the lower end of the hollow shaft (601). The stirring blades (602) are hollow and communicate with the hollow shaft (601). A water distribution hole group (603) is provided on the stirring blades (602). The hollow shaft (601) passes through the water inlet tank (8) and is rotatably connected to the water inlet tank (8) in a sealed manner. The hollow shaft (601) is connected to the water inlet tank (8) and is connected to the drive mechanism (7).

3. The phosphoric acid dilution apparatus according to claim 2, characterized in that: The water distribution hole group (603) is arranged around the stirring blade (602) and distributed radially along the dilution tank (1).

4. The phosphoric acid dilution apparatus according to claim 2, characterized in that: The drive mechanism (7) includes a support (701) fixed on the upper end of the water inlet tank (8), and a motor (702) is fixed on the support (701). The output shaft of the motor (702) is connected to the hollow shaft (601) through a coupling (703).

5. The phosphoric acid dilution apparatus according to claim 2, characterized in that: The dilution tank (1) has a sleeve (12) fixed inside, which is sleeved on the hollow shaft (601) and forms an annular gap with the hollow shaft (601). The annular gap is provided with a spiral blade (13) fixed on the hollow shaft (601). The sleeve (12) has a set of liquid inlet holes (14) distributed on the upper part of the spiral blade (13).

6. The phosphoric acid dilution apparatus according to claim 1, characterized in that: The lower end of the dilution tank (1) is connected to a dilute phosphoric acid tank (15) via a valve.

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