A pure water tank for industrial sulfuric acid production and processing

Abstract

This utility model discloses a pure water tank for industrial sulfuric acid production and processing, including a pure water tank, multiple dilution tanks, and multiple pipelines. Each pure water tank is individually connected to each dilution tank via a pipeline. Each pipeline is equipped with a flow meter and a first switching valve. An inlet is located at the top of the pure water tank. Sulfuric acid concentration meters are installed on the dilution tanks. This utility model relates to the technical field of pure water tank equipment. This pure water tank for industrial sulfuric acid production and processing, by installing backwashing mechanisms on each water supply pipeline, can periodically flush the water supply pipelines (including the pure water tank), thereby flushing away trace amounts of acidic vapor that have invaded the inner wall of the pipeline, preventing corrosion of the pipeline inner wall and avoiding the problem of scaling. Furthermore, the wastewater after flushing is safely treated before being discharged, without polluting the environment.

Description

Technical Field

[0001] This utility model relates to the technical field of pure water tank equipment, specifically a pure water tank for industrial sulfuric acid production and processing. Background Technology

[0002] In industrial sulfuric acid production (such as the contact process), the pure water tank is one of the core pieces of equipment to ensure the stability of the production process and the quality of the product. By injecting high-purity water, the concentration of concentrated sulfuric acid is controlled (such as diluting 98% sulfuric acid to different grades), ensuring the efficiency of sulfur trioxide absorption and that the finished acid meets the standards.

[0003] Although pure water tanks are currently indispensable in sulfuric acid production, there are still some problems with the technology that need to be improved. Most tanks are made of conventional stainless steel (such as 304 / 316L), which is prone to pitting corrosion and stress corrosion cracking when exposed to trace amounts of acidic vapor for a long time. This can lead to the leaching of metal ions (Fe, Cr) and contamination of the water quality, and even the formation of a crust on the inner wall of the pipes, which may eventually block the pipes. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a pure water tank for industrial sulfuric acid production and processing, which solves the problem of skin formation on water supply pipelines caused by acidic vapor corrosion in existing pure water tank equipment.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pure water tank for industrial sulfuric acid production and processing, comprising a pure water tank, multiple dilution tanks and multiple pipelines, wherein the pure water tank is individually connected to each dilution tank through each pipeline, each pipeline is equipped with a flow meter and a first switching valve, and the top of the pure water tank is provided with a water inlet.

[0008] A sulfuric acid concentration meter is installed on the dilution tank.

[0009] The backflush main pipe is connected to various pipelines via multiple manifolds, and each manifold is equipped with a second switch valve. A tee pipe is installed at the end of the backflush main pipe, and a third switch valve and a fourth switch valve are installed at two of the two ends of the tee pipe, respectively. The third switch valve is connected to the high-pressure flushing pump, and the fourth switch valve is connected to the waste discharge box. An ultrapure water system is also installed on the pipeline located at the fourth switch valve.

[0010] As a further preferred embodiment, the waste discharge box is equipped with an addition port and a waste discharge port at the top and bottom, respectively. A first motor is also installed at the top of the waste discharge box, which can drive a first stirring shaft located inside the waste discharge box to rotate. A pH meter is also installed in the middle of the waste discharge box.

[0011] As a further preferred embodiment, a second motor is installed on the top of the pure water tank, which can drive a second stirring shaft located inside the pure water tank to rotate, and a cleaning brush is installed on the outside of the second stirring shaft.

[0012] (III) Beneficial Effects

[0013] This invention provides a pure water tank for industrial sulfuric acid production and processing. It has the following beneficial effects:

[0014] The pure water tank used for industrial sulfuric acid production and processing has a backwashing mechanism installed on each water supply pipeline. This mechanism can periodically flush the water supply pipeline (including the pure water tank), thereby flushing away the trace amounts of acidic vapor that have invaded the inner wall of the pipeline, preventing corrosion of the inner wall and avoiding the problem of skin formation. Furthermore, the wastewater after flushing is safely treated before being discharged, without polluting the environment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an enlarged view of a partial structure of the present invention.

[0017] In the diagram: 1. Pure water tank; 2. Dilution tank; 3. Piping; 4. Inlet; 5. Flow meter; 6. First switch valve; 7. Sulfuric acid concentration meter; 8. Backflush main pipe; 9. High-pressure flushing pump; 10. Manifold; 11. Second switch valve; 12. T-connector; 13. Third switch valve; 14. Fourth switch valve; 15. Ultrapure water system; 16. Waste discharge tank; 17. Addition port; 18. Waste discharge port; 19. First motor; 20. First stirring shaft; 21. pH meter; 22. Second motor; 23. Second stirring shaft; 24. Cleaning brush. Detailed Implementation

[0018] 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.

[0019] like Figure 1-2As shown, this utility model provides a technical solution: a pure water tank for industrial sulfuric acid production and processing, characterized in that: it includes a pure water tank 1, multiple dilution tanks 2 and multiple pipelines 3 (the inner wall of the pipelines 3 can be made of PTFE lining + nano-ceramic coating material to improve corrosion resistance), the pure water tank 1 is individually connected to each dilution tank 2 through each pipeline 3, each pipeline 3 is equipped with a flow meter 5 (which can detect the amount of pure water added) and a first switch valve 6, and the top of the pure water tank 1 is provided with a water inlet 4.

[0020] A sulfuric acid concentration meter 7 is installed on the dilution tank 2. The concentration of sulfuric acid in the dilution tank 2 after dilution can be determined by the sulfuric acid concentration meter 7.

[0021] The backflush main pipe 8 is connected to each pipeline 3 via multiple manifolds 10, and each manifold 10 is equipped with a second switch valve 11. A tee pipe 12 is installed at the end of the backflush main pipe 8, with a third switch valve 13 and a fourth switch valve 14 installed at two of its ports. The third switch valve 13 is connected to the high-pressure flushing pump 9. It should be noted that the flushing is performed in two stages. In the first stage, tap water can be used for flushing (mainly to save costs). After basic flushing, the second stage begins, using pure water for flushing. The water quality is tested using an ultrapure water instrument 15 at the end until the discharged wastewater meets the standards, at which point a complete flushing operation is considered finished.

[0022] A second motor 22 is installed on the top of the pure water tank 1. The second motor 22 drives the second stirring shaft 23 located inside the pure water tank 1 to rotate. A cleaning brush 24 is installed on the outside of the second stirring shaft 23. High-pressure water can flow back into the pure water tank 1. When the second motor 22 is turned on, it drives the first stirring shaft 23 to rotate, thereby cleaning the inside of the pure water tank 1. The cleaning brush 24 removes any small amount of scale that may have adhered to the inner wall of the pure water tank 1.

[0023] The fourth switch valve 14 is connected to the waste discharge box 16, and an ultrapure water instrument 15 is also installed on the pipeline located on the fourth switch valve 14.

[0024] The waste discharge tank 16 has an addition port 17 at its top and a discharge port 18 at its bottom. A first motor 19 is also installed on the top of the waste discharge tank 16, which drives a first stirring shaft 20 located inside the waste discharge tank 16 to rotate. A pH meter 21 is also installed in the middle of the waste discharge tank 16. Since the wastewater is slightly acidic, a small amount of alkaline powder or liquid (such as sodium hydroxide) is added to the waste discharge tank 16 through the addition port 17. The first motor 19 is then turned on, driving the first stirring shaft 20 to rotate, thereby mixing the wastewater with the alkaline material to achieve an acid-base neutralization reaction. The pH value of the wastewater is detected by the pH meter 21. Once the pH value is normal, the wastewater is finally discharged through the discharge port 18.

[0025] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0026] In use, pure water is supplied to the pure water tank 1 through the inlet 4. By opening the first switch valve 6, the pure water can be transported to the dilution tank 2 through the pipeline 3 to dilute the concentrated sulfuric acid inside. Each pipeline 3 can be controlled individually, or all or some of the first switch valves 6 can be opened simultaneously to achieve the purpose of centralized dilution.

[0027] Since a small amount of acidic vapor in the dilution tank 2 will inevitably enter the pipe 3 and be adsorbed on the inner wall of the pipe 3, causing corrosion and scaling problems, we can carry out pipe maintenance work regularly.

[0028] Specifically, first, the first switch valve 6 is closed, and the second switch valve 11 and the third switch valve 13 are opened simultaneously. The high-pressure flushing pump 9 is turned on, and high-pressure water is introduced into the backflush main pipe 8 and introduced into each pipeline 3 through each manifold 10. Under high pressure, the water flow can backflush the entire pipeline 3, flushing and diluting the trace acidic vapor in the pipeline 3, thereby greatly alleviating the corrosion and scaling problems.

[0029] Then close the third switch valve 13 and open the fourth switch valve 14. The wastewater then flows through the pipeline 3, manifold 10 and backflush main pipe 8 and finally enters the waste discharge box 16 for temporary storage. It is repeatedly flushed until it is clean.

[0030] In summary, the pure water tank used for industrial sulfuric acid production and processing, by installing backwashing mechanisms on each water supply pipeline, can periodically flush the water supply pipeline (including the pure water tank), thereby flushing away the trace amounts of acidic vapor that have invaded the inner wall of the pipeline, preventing corrosion of the inner wall of the pipeline and avoiding the problem of skin formation; furthermore, the wastewater after flushing is safely treated before being discharged, without polluting the environment.

[0031] It should be noted that all electrical components mentioned in this article are electrically connected to an external main controller and 220V or 380V AC mains power. The main controller can be a conventional, known device such as a computer, and its control principles, internal structure, and control switching methods are all conventional methods of existing technology. These are directly cited here without further elaboration. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pure water tank for industrial sulfuric acid production processing, characterized by: It includes a pure water tank (1), multiple dilution tanks (2) and multiple pipelines (3). The pure water tank (1) is connected to each dilution tank (2) individually through each pipeline (3). Each pipeline (3) is equipped with a flow meter (5) and a first switch valve (6). The top of the pure water tank (1) is equipped with a water inlet (4). A sulfuric acid concentration meter (7) is installed on the dilution tank (2); The backflush main pipe (8) is connected to each pipeline (3) through multiple manifolds (10), and each manifold (10) is equipped with a second switch valve (11). A three-way pipe (12) is installed at the end of the backflush main pipe (8). A third switch valve (13) and a fourth switch valve (14) are installed at two of the two ends of the three-way pipe (12). The third switch valve (13) is connected to the high-pressure flushing pump (9), and the fourth switch valve (14) is connected to the waste discharge box (16). An ultrapure water instrument (15) is also installed on the pipeline located on the fourth switch valve (14).

2. The pure water tank for industrial sulfuric acid production and processing according to claim 1, characterized in that: The top and bottom of the waste discharge box (16) are respectively equipped with an addition port (17) and a waste discharge port (18). The top of the waste discharge box (16) is also equipped with a first motor (19), which can drive the first stirring shaft (20) located inside the waste discharge box (16) to rotate. The middle part of the waste discharge box (16) is also equipped with a pH meter (21).

3. The pure water tank for industrial sulfuric acid production and processing according to claim 1, characterized in that: A second motor (22) is installed on the top of the pure water tank (1). The second motor (22) can drive the second stirring shaft (23) located inside the pure water tank (1) to rotate. A cleaning brush (24) is installed on the outside of the second stirring shaft (23).

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