A concentrated nitric acid and water storage tank cooling device

Abstract

This utility model discloses a cooling device for a concentrated nitric acid water storage tank, including an acid water tank, a U-shaped pipe, a connecting pipe, and an auxiliary cooling component. This concentrated nitric acid water storage tank cooling device enhances the heat exchange effect between the chilled water and acidic water such as concentrated nitric acid within the S-shaped pipes through two rotating S-shaped pipes, thereby effectively reducing the temperature of the acidic water in the acid water tank, improving the absorption of nitrogen oxides by the acidic water, reducing nitrogen oxide emissions, and alleviating environmental pressure. Simultaneously, the rotation of the first rotating shaft drives the auxiliary cooling component to work, further enhancing the cooling effect of the concentrated nitric acid and other acidic water. When the chilled water system malfunctions, it can be switched to circulating water in a timely manner to avoid significant impact on the device; in winter, when the circulating water temperature is low, the use of chilled water can also be stopped, thereby reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of concentrated nitric acid water cooling technology, specifically a concentrated nitric acid water storage tank cooling device. Background Technology

[0002] In the production or use of concentrated nitric acid (HNO3), acidic water typically refers to wastewater or process circulating water containing nitric acid, nitrogen oxides (NOx), and other acidic impurities. It is characterized by strong corrosiveness, high temperature, and high volatility, placing extremely high demands on equipment materials and environmental treatment. The function of acidic water is to provide power to the ejector via an acidic water pump, creating negative pressure to extract non-condensable gases generated within the device. Simultaneously, within the ejector, the acidic water mixes with the non-condensable acidic gases, achieving the effect of absorbing acidic gases and reducing the concentration of acidic gases in the vented air.

[0003] However, high temperatures in acidic water negatively impact the normal operation of acidic water pumps, easily causing cavitation during operation. Higher temperatures also increase corrosiveness, corroding the sealing packing within the mechanical seal, affecting its lifespan, increasing equipment maintenance costs, and posing safety hazards to the plant's safe operation. Furthermore, higher temperatures reduce the effectiveness of acidic water in absorbing non-condensable gases, leading to increased nitrogen oxide content in the vented acidic gases and failing to meet environmental standards. Therefore, we propose a cooling device for concentrated nitric acid water storage tanks. Utility Model Content

[0004] The technical problem this invention aims to solve is to overcome existing defects and provide a cooling device for a concentrated nitric acid water storage tank. In use, concentrated nitric acid or other acidic water is poured into the acid water tank. The first and second control valves are opened, while the third and fourth control valves are closed. The chilled water pipe is connected to the outlet of an external chilled water system. The chilled water then flows through the chilled water pipe, sequentially passing through the first S-shaped pipe, the U-shaped pipe, and the second S-shaped pipe before being discharged and collected from the outlet pipe. Simultaneously, the drive assembly is activated, causing the first rotating shaft to rotate in both directions. The rotation of the first rotating shaft drives the first gear, which in turn drives the second gear, which in turn drives the third gear. The rotation of the second and third gears, in turn, drives the respective connected S-shaped pipes to rotate, thereby increasing the cooling capacity within the S-shaped pipes. The heat exchange effect of chilled water and acidic water such as concentrated nitric acid effectively reduces the temperature of acidic water in the acid water tank, improves the absorption of nitrogen oxides by acidic water, reduces nitrogen oxide emissions, and alleviates environmental pressure. At the same time, the rotation of the first shaft drives the auxiliary cooling components to work, further enhancing the cooling effect of acidic water such as concentrated nitric acid. In this embodiment, when the chilled water system malfunctions, the first control valve is closed, and the second, third, and fourth control valves are opened to connect circulating water to the circulating water pipe. The circulating water flows in two S-shaped pipes and a U-shaped pipe and is discharged and collected from the outlet. This allows for timely switching to circulating water, avoiding significant impact on the device. When the circulating water temperature is low in winter, the use of chilled water can also be stopped, thereby reducing production costs and effectively solving the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a concentrated nitric acid water storage tank cooling device, comprising an acid water tank, a U-shaped pipe, a connecting pipe, and an auxiliary cooling component; S-shaped pipes are rotatably installed on both sides of the interior of the acid water tank, with two S-shaped pipes arranged symmetrically. The two ends of the U-shaped pipe are rotatably connected to the left ends of the two S-shaped pipes respectively. A third gear is installed on the right side of the front S-shaped pipe, and a second gear is installed on the right side of the rear S-shaped pipe. The second and third gears are meshed. A first rotating shaft is rotatably installed on the right side of the acid water tank, and a first gear is installed on the first rotating shaft. The first and second gears are meshed. A drive assembly is installed on the right side of the acid water tank. The first rotating shaft is connected to the right end of the first rotating shaft. An auxiliary cooling component is provided above the middle of the acid water tank. The auxiliary cooling component is connected to the left end of the first rotating shaft. The right ends of the two S-shaped pipes are connected by a connecting pipe. A fourth control valve is installed on the connecting pipe. A circulating water pipe is installed on the upper surface of the middle part of the U-shaped pipe. A third control valve is installed on the circulating water pipe. A chilled water pipe is installed on the right end of the front S-shaped pipe. A first control valve is installed on the chilled water pipe. A water outlet pipe is installed on the right end of the rear S-shaped pipe. A second control valve is installed on the water outlet pipe.

[0006] Furthermore, the auxiliary cooling component includes a lead screw rotatably mounted on the upper side wall of the middle section of the acid water tank. The right end of the lead screw is connected to the left end of the first rotating shaft. A movable block is threaded onto the lead screw, and a limit post is slidably mounted inside the movable block. The two ends of the limit post are respectively connected to the two side walls of the acid water tank. An L-shaped bracket is mounted on the side of the movable block, and a U-shaped plate is mounted on the lower end of the L-shaped bracket. The lower end of the L-shaped bracket is connected to the middle of the U-shaped plate. The forward and reverse rotation of the first rotating shaft drives the lead screw to rotate. The rotation of the lead screw, under the action of the limit post, drives the movable block to move. The movement of the movable block drives the L-shaped bracket and the U-shaped plate to move. The movement of the U-shaped plate pushes and stirs the acidic water at the edge of the acid water tank, facilitating heat exchange and further improving the cooling and heat exchange effect on concentrated nitric acid and other acidic water.

[0007] Furthermore, the drive assembly includes a motor bracket mounted on the right side of the acid water tank, on which a motor is mounted. The output shaft of the motor is connected to the right end of the first rotating shaft via a coupling, and the input end of the motor is electrically connected to the output end of an external controller. The external controller controls the motor's operation, which in turn drives the first rotating shaft to rotate electrically.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, after concentrated nitric acid or other acidic water is poured into the acid water tank, the first and second control valves are opened, while the third and fourth control valves are closed. The chilled water pipe is connected to the outlet of an external chilled water system. The chilled water then flows through the first S-shaped pipe, the U-shaped pipe, and the second S-shaped pipe before being discharged and collected from the outlet pipe. Simultaneously, the drive assembly is activated, causing the first rotating shaft to rotate in both directions. This rotation drives the first gear, which in turn drives the second gear, which in turn drives the third gear. The rotation of the second and third gears then drives the respective connected S-shaped pipes to rotate, thereby increasing the temperature of the S-shaped pipe. The heat exchange effect between chilled water and acidic water such as concentrated nitric acid in the pipe is improved, thereby effectively reducing the temperature of acidic water in the acid water tank, improving the absorption of nitrogen oxides by acidic water, reducing nitrogen oxide emissions, and alleviating environmental pressure. At the same time, the rotation of the first shaft drives the auxiliary cooling components to work, further improving the cooling effect of acidic water such as concentrated nitric acid. In this embodiment, when the chilled water system fails, the first control valve is closed and the second, third, and fourth control valves are opened to connect circulating water to the circulating water pipe. The circulating water flows in the two S-shaped pipes and the U-shaped pipe and is discharged and collected from the outlet. This allows for timely switching to circulating water and avoids significant impact on the device. When the circulating water temperature is low in winter, the use of chilled water can also be stopped, thereby reducing production costs. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the structure of this utility model.

[0010] In the diagram: 1. Acid water tank, 2. S-shaped pipe, 3. L-shaped support, 4. Moving block, 5. Limiting column, 6. Lead screw, 7. First gear, 8. Motor support, 9. Second gear, 10. Motor, 11. Third gear, 12. First control valve, 13. Connecting pipe, 14. Second control valve, 15. Third control valve, 16. Circulating water pipe, 17. U-shaped plate, 18. U-shaped pipe, 19. Fourth control valve. Detailed Implementation

[0011] 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.

[0012] Please see Figure 1-2 This embodiment provides a technical solution: a concentrated nitric acid water storage tank cooling device, including an acid water tank 1, a U-shaped pipe 18, a connecting pipe 13 and an auxiliary cooling component; S-shaped pipes 2 are rotatably installed on both sides of the interior of the acid water tank 1. The two S-shaped pipes 2 are symmetrically arranged. The two ends of the U-shaped pipe 18 are rotatably connected to the left ends of the two S-shaped pipes 2 respectively. A third gear 11 is installed on the right side of the front S-shaped pipe 2, and a second gear 9 is installed on the right side of the rear S-shaped pipe 2. The second gear 9 and the third gear 11 are meshed together. A first rotating shaft is rotatably installed on the right side of the acid water tank 1. A first gear 7 is installed on the first rotating shaft. The first gear 7 and the second gear 9 are meshed together. A drive assembly is installed on the right side of the acid water tank 1. The drive assembly and the third gear 11 are meshed together. The right end of a rotating shaft is connected to an auxiliary cooling component located above the middle of the acid water tank 1. The auxiliary cooling component is connected to the left end of the first rotating shaft. The right ends of two S-shaped pipes 2 are connected by a connecting pipe 13. A fourth control valve 19 is installed on the connecting pipe 13. A circulating water pipe 16 is installed on the upper surface of the middle part of the U-shaped pipe 18. A third control valve 15 is installed on the circulating water pipe 16. A chilled water pipe is installed on the right end of the front S-shaped pipe 2. A first control valve 12 is installed on the chilled water pipe. A water outlet pipe is installed on the right end of the rear S-shaped pipe 2. A second control valve 14 is installed on the water outlet pipe.

[0013] In operation, concentrated nitric acid or other acidic water is poured into acid water tank 1. The first control valve 12 and the second control valve 14 are opened, while the third control valve 15 and the fourth control valve 19 are closed. The chilled water pipe is connected to the outlet of an external chilled water system. Chilled water then enters through the chilled water pipe, flows sequentially through the first S-shaped pipe 2, the U-shaped pipe 18, and the second S-shaped pipe 2, and is discharged from the outlet pipe for collection. Simultaneously, the drive assembly is activated, causing the first rotating shaft to rotate in both directions. The rotation of the first rotating shaft drives the first gear 7, which in turn drives the second gear 9. The second gear 9 then drives the third gear 11. The rotation of the second gear 9 and the third gear 11, in turn, drives the respective connected S-shaped pipes 2 to rotate, thereby increasing the volume of chilled water and concentrated nitric acid within the S-shaped pipes 2. The heat exchange effect of acidic water effectively reduces the temperature of acidic water in the acid water tank, improves the absorption of nitrogen oxides by acidic water, reduces nitrogen oxide emissions, and alleviates environmental pressure. At the same time, the rotation of the first shaft drives the auxiliary cooling components to work, further improving the cooling effect of concentrated nitric acid and other acidic water. In this embodiment, when the chilled water system malfunctions, the first control valve 12 is closed, and the second control valve 14, the third control valve 15, and the fourth control valve 19 are opened to connect circulating water to the circulating water pipe 16. The circulating water flows in the two S-shaped pipes 2 and the U-shaped pipe 18 and is discharged and collected from the outlet. This allows for timely switching to circulating water to avoid significant impact on the device. When the circulating water temperature is low in winter, the use of chilled water can also be stopped, thereby reducing production costs.

[0014] The auxiliary cooling assembly includes a lead screw 6 rotatably mounted on the upper side wall of the middle part of the acid water tank 1. The right end of the lead screw 6 is connected to the left end of the first rotating shaft. A movable block 4 is threaded onto the lead screw 6. A limit post 5 is slidably mounted inside the movable block 4. The two ends of the limit post 5 are connected to the two side walls of the acid water tank 1, respectively. An L-shaped bracket 3 is mounted on the side of the movable block 4. A U-shaped plate 17 is mounted on the lower end of the L-shaped bracket 3. The lower end of the L-shaped bracket 3 is connected to the middle of the U-shaped plate 17. The forward and reverse rotation of the first rotating shaft drives the lead screw 6 to rotate. The rotation of the lead screw 6, under the action of the limit post 5, drives the movable block 4 to move. The movement of the movable block 4 drives the L-shaped bracket 3 and the U-shaped plate 17 to move. The movement of the U-shaped plate 17 pushes and stirs the acidic water at the edge of the acid water tank 1 to facilitate heat exchange and further improve the cooling and heat exchange effect on concentrated nitric acid and other acidic water.

[0015] The drive assembly includes a motor bracket 8 mounted on the right side of the acid water tank 1, on which a motor 10 is mounted. The output shaft of the motor 10 is connected to the right end of the first rotating shaft via a coupling, and the input end of the motor 10 is electrically connected to the output end of an external controller. The external controller controls the operation of the motor 10, which in turn drives the first rotating shaft to rotate electrically.

[0016] The working principle of the concentrated nitric acid water storage tank cooling device provided by this utility model is as follows: During use, concentrated nitric acid or other acidic water is poured into the acid water tank 1. The first control valve 12 and the second control valve 14 are opened, while the third control valve 15 and the fourth control valve 19 are closed. The chilled water pipe is connected to the outlet of an external chilled water system. The chilled water then enters through the chilled water pipe, flows sequentially through the first S-shaped pipe 2, the U-shaped pipe 18, and the second S-shaped pipe 2, and is discharged from the outlet pipe for collection. Simultaneously, the drive assembly is activated, causing the first rotating shaft to rotate in both directions. The rotation of the first rotating shaft drives the first gear 7 to rotate, which in turn drives the second gear 9 to rotate. The rotation of the second gear 9 drives the third gear 11 to rotate, and the rotation of the second gear 9 and the third gear 11 drives the respective connected S-shaped pipes 2 to rotate, thereby increasing the cooling capacity. The heat exchange effect of chilled water and acidic water such as concentrated nitric acid in the S-shaped pipe 2 is enhanced, thereby effectively reducing the temperature of acidic water in the acid water tank, improving the absorption effect of nitrogen oxides by acidic water, reducing nitrogen oxide emissions, and alleviating environmental pressure. At the same time, the rotation of the first shaft drives the auxiliary cooling component to work, further enhancing the cooling effect of acidic water such as concentrated nitric acid. In this embodiment, when the chilled water system malfunctions, the first control valve 12 is closed, and the second control valve 14, the third control valve 15, and the fourth control valve 19 are opened, connecting the circulating water to the circulating water pipe 16. The circulating water flows in the two S-shaped pipes 2 and the U-shaped pipe 18, and is discharged and collected from the outlet. This allows for timely switching to circulating water, avoiding significant impact on the device. When the circulating water temperature is low in winter, the use of chilled water can also be stopped, thereby reducing production costs. The first rotating shaft rotates in both directions, driving the lead screw 6 to rotate. The lead screw 6, under the action of the limiting post 5, moves the moving block 4. The moving block 4 then moves the L-shaped bracket 3 and the U-shaped plate 17. The U-shaped plate 17 moves and stirs the acidic water at the edge of the acid water tank 1, facilitating heat exchange and further improving the cooling and heat exchange effect on concentrated nitric acid and other acidic water. An external controller controls the motor 10, which in turn drives the first rotating shaft, thus electrically completing its rotation.

[0017] It is worth noting that in this embodiment, the core chip of the external controller is an STC microcontroller, specifically the STC15W204S. The induced draft fan 2 and motor 31 can be freely configured according to the actual application scenario. The external controller controls the operation of the induced draft fan 2 and motor 31 using methods commonly used in the prior art, and the content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0018] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cooling device for a concentrated nitric acid water storage tank, characterized in that: It includes an acid water tank (1), a U-shaped pipe (18), a connecting pipe (13), and an auxiliary cooling component; S-shaped pipes (2) are rotatably installed on both sides of the interior of the acid water tank (1). The two S-shaped pipes (2) are symmetrically arranged. The two ends of the U-shaped pipe (18) are rotatably connected to the left ends of the two S-shaped pipes (2) respectively. A third gear (11) is installed on the right side of the front S-shaped pipe (2), and a second gear (9) is installed on the right side of the rear S-shaped pipe (2). The second gear (9) and the third gear (11) are meshed. A first rotating shaft is rotatably installed on the right side of the acid water tank (1). A first gear (7) is installed on the first rotating shaft. The first gear (7) and the second gear (9) are meshed. A drive assembly is installed on the right side of the acid water tank (1). The component is connected to the right end of the first rotating shaft. An auxiliary cooling component is provided above the middle part of the acid water tank (1). The auxiliary cooling component is connected to the left end of the first rotating shaft. The right parts of the two S-shaped pipes (2) are connected by a connecting pipe (13). A fourth control valve (19) is installed on the connecting pipe (13). A circulating water pipe (16) is installed on the upper surface of the middle part of the U-shaped pipe (18). A third control valve (15) is installed on the circulating water pipe (16). A chilled water pipe is installed at the right end of the front S-shaped pipe (2). A first control valve (12) is installed on the chilled water pipe. A water outlet pipe is installed at the right end of the rear S-shaped pipe (2). A second control valve (14) is installed on the water outlet pipe.

2. The concentrated nitric acid acid water tank cooling device according to claim 1, characterized in that: The auxiliary cooling component includes a lead screw (6) rotatably mounted on the upper side wall of the middle part of the acid water tank (1). The right end of the lead screw (6) is connected to the left end of the first rotating shaft. A moving block (4) is threaded on the lead screw (6). A limit post (5) is slidably mounted inside the moving block (4). The two ends of the limit post (5) are respectively connected to the two side walls of the acid water tank (1). An L-shaped bracket (3) is mounted on the side of the moving block (4). A U-shaped plate (17) is mounted on the lower end of the L-shaped bracket (3). The lower end of the L-shaped bracket (3) is connected to the middle part of the U-shaped plate (17).

3. The concentrated nitric acid water storage tank cooling device according to claim 1, characterized in that: The drive assembly includes a motor bracket (8) installed on the right side of the acid water tank (1), on which a motor (10) is mounted. The output shaft of the motor (10) is connected to the right end of the first rotating shaft via a coupling, and the input end of the motor (10) is electrically connected to the output end of an external controller.

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