Multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water

Abstract

The utility model belongs to the technical field of ammonia water preparation, and particularly relates to a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water, which comprises a bottom plate, and an ammonia storage tank, a water storage tank and a return tank are sequentially arranged on the rear side of the top of the bottom plate from right to left. A jet mixer, a static mixer and a U-shaped pipe are sequentially arranged in the middle of the top side of the bottom plate from right to left, the jet mixer realizes high-speed hedging and mixing of liquid ammonia and water by utilizing a Venturi effect, and the static mixer further enhances turbulence disturbance through an internal spiral shunting element; the S-shaped structure of the U-shaped pipe prolongs the mixing path and ensures full contact of the two phases, meanwhile, the spiral cooling flow channel of the first cooling sleeve rapidly takes away reaction heat by increasing the contact area of a cooling medium and the mixing pipe, the partition plate of the second cooling sleeve divides the cooling cavity into two sections, and the cooling effect is good. And cooling water is guided to form vortex flow through the spiral guide vanes, so that the heat transfer efficiency is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of ammonia preparation technology, specifically a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water. Background Technology

[0002] A mixing device for preparing ammonia water by mixing liquid ammonia with water is an industrial equipment used to prepare ammonia water by mixing liquid ammonia and water in a certain proportion. Ammonia water is an important chemical raw material and is widely used in fertilizer production, environmental denitrification, pharmaceuticals, and daily chemicals.

[0003] In existing industrial processes for preparing ammonia water by mixing liquid ammonia with water, traditional single-stage mixing equipment (such as stirred tanks) relies solely on mechanical stirring, resulting in a limited contact area between liquid ammonia and water. This leads to long mixing times, and the liquid ammonia dissolution process releases a large amount of heat. Existing cooling systems mostly use air cooling or simple water cooling, which causes excessively high pipe temperatures, resulting in ammonia evaporation in the pipes. This not only wastes resources but may also pose safety risks. Furthermore, the impact during the mixing process can cause pipe vibration, which can easily lead to equipment loosening, seal failure, or even leakage accidents over long-term operation. Therefore, we propose a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water. Through a three-stage mixing structure (jet mixer, static mixer, and U-tube) and segmented cooling design, the mixing efficiency of liquid ammonia and water is significantly optimized. The vibration damping component, through a buffer structure and lifting adjustment mechanism, significantly reduces pipeline vibration caused by impact and fluid pulsation during the mixing process, thus solving the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water, comprising a base plate, an ammonia storage tank, a water storage tank, and a reflux tank arranged sequentially from right to left on the rear top side of the base plate, a jet mixer, a static mixer, and a U-shaped tube arranged sequentially from right to left on the middle top side of the base plate, a cooling water tank arranged on the front top side of the base plate, the output end of the jet mixer and the input end of the static mixer being fixedly connected by flanges, corrugated pipes being fixedly connected to both ends of the U-shaped tube by flanges, the input end of the corrugated pipe on the right side being fixedly connected to the output end of the static mixer by flanges, and the output end of the corrugated pipe on the left side being fixedly connected to an ammonia water outlet pipe by flanges, a material conveying assembly and a reflux assembly arranged on the top of the base plate, a first cooling assembly arranged on the jet mixer, a second cooling assembly arranged on the static mixer, and a vibration damping assembly installed at the bottom of the U-shaped tube.

[0006] Preferably, the feeding assembly includes a liquid ammonia transfer pump, which is fixedly installed on the top right side of the base plate. The right input end of the jet mixer is fixedly connected to a liquid ammonia inlet pipe, and the input end of the liquid ammonia inlet pipe is fixedly connected to the output end of the liquid ammonia transfer pump. The bottom input end of the jet mixer is fixedly connected to a water inlet pipe. The front bottom of the ammonia storage tank, water storage tank, and reflux tank are all fixedly connected to a solenoid valve. The ammonia storage tank is fixedly connected to the liquid ammonia transfer pump through the solenoid valve, and the water storage tank is fixedly connected to the water inlet pipe through the solenoid valve.

[0007] Preferably, the reflux assembly includes an ammonia reflux pipe II, the output end of which is fixedly connected to the top of the reflux tank; a solenoid valve II is fixedly connected to the left output end of the ammonia outlet pipe; a branch pipe is fixedly connected to the rear side of the ammonia outlet pipe; a solenoid valve III is fixedly connected to the input end of the ammonia reflux pipe II; the input end of the solenoid valve III is fixedly connected to the output end of the branch pipe; the reflux tank is fixedly connected to an ammonia reflux pipe I via a solenoid valve I; and the output end of the ammonia reflux pipe I is fixedly connected to the inlet pipe.

[0008] Preferably, the first cooling component includes a cooling sleeve, which is fixedly fitted onto the outer surface of the jet mixer. A spiral cooling channel is formed inside the cooling sleeve. An inlet and an outlet are respectively formed on the top right side and bottom left side of the cooling sleeve, and both the inlet and the outlet are connected to the spiral cooling channel.

[0009] Preferably, the second cooling assembly includes a second cooling jacket. A partition is fixedly connected between the left and right sides of the interior of the second cooling jacket. The interior of the second cooling jacket is divided into a first cooling tank and a second cooling tank by the partition. Several connecting holes are opened through the left side of the partition, and the first cooling tank and the second cooling tank are connected through the connecting holes. A second water inlet and a second water outlet are opened at the top and bottom of the left side of the second cooling jacket, respectively. The output end of the second water inlet is fixedly connected to the second cooling tank, and the input end of the second water outlet is fixedly connected to the first cooling tank. Several spiral guide vanes are fixedly connected to the inner surface of the second cooling tank.

[0010] Preferably, the vibration damping component includes a mounting plate one, which is fixedly mounted on the top side of the base plate. A lifting plate is provided above the mounting plate one, and a lifting mechanism is installed between the mounting plate one and the lifting plate. Mounting plates two are fixedly connected to the top left and right sides of the lifting plate. Two sets of clamps are rotatably mounted between the tops of the two sets of mounting plates two. A limiting plate one is fixedly connected between the two sets of mounting plates two. The bottom sides of the two sets of clamps, which are close to each other, abut against the front and rear sides of the limiting plate one, respectively. The two sets of clamps are respectively set on the bottom front and rear sides of the U-shaped tube. The tops of the two sets of clamps are fixedly connected by bolts. Several sliding rods are slidably passed through the two sets of clamps. A rubber plate is fixedly connected to the end of the sliding rod near the U-shaped tube. The side of the rubber plate near the U-shaped tube abuts against the outer surface of the U-shaped tube. A limiting plate two is fixedly connected to the end of the sliding rod away from the U-shaped tube. A spring is sleeved on the sliding rod, and the two sides of the spring abut against the clamp and the rubber plate, respectively.

[0011] Preferably, the lifting mechanism includes a lifting cylinder, which is fixedly installed on the top side of the mounting plate. The output shaft end of the lifting cylinder is fixedly connected to the middle of the bottom side of the lifting plate. Two sets of limiting rods are fixedly connected to the top left and right sides of the mounting plate, and the top ends of the four sets of limiting rods slide through the four corners of the lifting plate.

[0012] Preferably, a cooling water delivery pump is provided on the left side of the cooling water tank. The input end of the cooling water delivery pump is fixedly connected to the cooling water tank through a pipe, and the output end of the cooling water delivery pump is fixedly connected to a cooling water inlet pipe. The input ends of inlet one and inlet two are both fixedly connected to the cooling water inlet pipe through pipes. The output ends of outlet one and outlet two are both fixedly connected to a cooling water outlet pipe. The output end of the cooling water outlet pipe is fixedly connected to the top of the cooling water tank. Several semiconductor cooling chips are installed on the bottom side inside the cooling water tank.

[0013] Preferably, an insertable temperature sensor is installed on the top right side of the jet mixer.

[0014] Preferably, an ammonia concentration meter is installed on the top right side of the ammonia outlet pipe.

[0015] This invention provides a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water. Compared with the prior art, it has the following advantages:

[0016] 1. This multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water utilizes the Venturi effect to achieve high-speed counter-current mixing of liquid ammonia and water. The static mixer further enhances turbulent disturbance through internal spiral diversion elements, while the serpentine structure of the U-shaped tube extends the mixing path to ensure full contact between the two phases. At the same time, the spiral cooling channel of cooling jacket one and the baffle-guide vane combination design of cooling jacket two achieve efficient circulation and uniform distribution of cooling water. The spiral cooling channel increases the contact area between the cooling medium and the mixing tube, quickly removing the heat of reaction. The baffle divides the cooling chamber into two sections, and the spiral guide vanes guide the cooling water to form a vortex flow, enhancing the heat transfer efficiency.

[0017] 2. This multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water has a vibration damping component that is fixed to the bottom of a U-shaped tube by bolts through a jacket. The buffer system composed of internal slide rods and springs can absorb high-frequency vibration energy. The tight fit between the rubber plate and the outer wall of the U-shaped tube further dampens low-frequency vibration. The lifting plate is driven to rise and fall by a lifting cylinder to achieve dynamic fit between the jacket and the U-shaped tube, which can adapt to the small displacement that may occur during long-term operation. In addition, the flexible connection design of the bellows and flange reduces stress concentration at the rigid connection and avoids leakage caused by loosening of the sealing surface due to vibration. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0019] Figure 2 This is a top view of the main structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the jet mixer and the static mixer of this utility model;

[0021] Figure 4 This is a schematic diagram of the spiral cooling channel structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the spiral guide vane structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the vibration damping component structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the vibration damping component of this utility model.

[0025] In the diagram: 1. Base plate; 2. Ammonia storage tank; 3. Water storage tank; 4. Reflux tank; 5. Liquid ammonia inlet pipe; 6. Water inlet pipe; 7. Solenoid valve one; 8. Ammonia water reflux pipe one; 9. Ammonia water reflux pipe two; 10. U-shaped pipe; 11. Cooling water tank; 12. Cooling water outlet pipe; 13. Liquid ammonia transfer pump; 14. Cooling water transfer pump; 15. Semiconductor refrigeration chip; 16. Corrugated pipe; 17. Ammonia water outlet pipe; 18. Ammonia water concentration meter; 19. Solenoid valve two; 20. Solenoid valve three; 21. Jet mixer; 22. Static mixer; 23. Cooling jacket one; 24. 25. Spiral cooling channel; 26. Inlet 1; 27. Outlet 1; 28. Insertion temperature sensor; 29. ​​Cooling jacket 2; 30. Partition plate; 31. Cooling tank 1; 32. Cooling tank 2; 33. Connecting hole; 34. Inlet 2; 35. Outlet 2; 36. Spiral guide vane; 37. Mounting plate 1; 38. Lifting cylinder; 39. Rubber plate; 40. Spring; 41. Cooling water inlet pipe; 42. Lifting plate; 43. Limiting rod; 44. Mounting plate 2; 45. Jacket; 46. Limiting plate 1; 47. Slide rod; 48. Limiting plate 2. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-7 This utility model provides a technical solution: a multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water, including a base plate 1. From right to left, an ammonia storage tank 2, a water storage tank 3, and a reflux tank 4 are arranged sequentially on the top rear side of the base plate 1. From right to left, a jet mixer 21, a static mixer 22, and a U-shaped tube 10 are arranged sequentially on the top middle side of the base plate 1. A cooling water tank 11 is arranged on the top front side of the base plate 1. The output end of the jet mixer 21 and the input end of the static mixer 22 are fixedly connected by flanges. Corrugated pipes 16 are fixedly connected to both ends of the U-shaped tube 10 by flanges. The input end of the corrugated pipe 16 on the right side is fixedly connected to the output end of the static mixer 22 by flanges. The output end of the corrugated pipe 16 on the left side is fixedly connected to an ammonia water outlet pipe 17 by flanges. A material conveying assembly and a reflux assembly are arranged on the top of the base plate 1. A first cooling assembly is arranged on the jet mixer 21, a second cooling assembly is arranged on the static mixer 22, and a vibration damping assembly is installed at the bottom of the U-shaped tube 10.

[0028] When the multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water is in operation, the liquid ammonia in the ammonia storage tank 2 and the water in the water storage tank 3 are respectively conveyed to the jet mixer 21 through the conveying assembly at the top of the base plate 1. After initial mixing in the jet mixer 21, the mixed fluid enters the input end of the static mixer 22 and is further mixed evenly through the static mixer 22. Subsequently, the mixed fluid flows out from the output end of the static mixer 22, through the input end of the right corrugated pipe 16, the U-shaped pipe 10 and the left corrugated pipe 16, and finally outputs the prepared ammonia water from the ammonia water outlet pipe 17. During the process, the first cooling assembly outside the jet mixer 21 and the second cooling assembly outside the static mixer 22 can cool the mixing process. The cooling water tank 11 provides the cooling medium for the cooling assembly. The vibration damping assembly at the bottom of the U-shaped pipe 10 can reduce pipeline vibration and ensure stable operation of the device. If the mixed ammonia water needs to be refluxed, it can be circulated through the reflux assembly at the top of the base plate 1 and the reflux tank 4 to achieve multi-stage mixing preparation of liquid ammonia and water.

[0029] The material conveying assembly includes a liquid ammonia transfer pump 13, which is fixedly installed on the top right side of the base plate 1. The right input end of the jet mixer 21 is fixedly connected to a liquid ammonia inlet pipe 5, and the input end of the liquid ammonia inlet pipe 5 is fixedly connected to the output end of the liquid ammonia transfer pump 13. The bottom input end of the jet mixer 21 is fixedly connected to a water inlet pipe 6. The front bottom of the ammonia storage tank 2, the water storage tank 3, and the return tank 4 are all fixedly connected to a solenoid valve 7. The ammonia storage tank 2 is fixedly connected to the liquid ammonia transfer pump 13 through the solenoid valve 7, and the water storage tank 3 is fixedly connected to the water inlet pipe 6 through the solenoid valve 7.

[0030] When the conveying assembly is working, the liquid ammonia in the ammonia storage tank 2 is opened by the solenoid valve 7 at the bottom front and then connected to the input end of the liquid ammonia transfer pump 13 through a pipeline. The liquid ammonia transfer pump 13 pressurizes the liquid ammonia and then delivers it to the right input end of the jet mixer 21 through the liquid ammonia inlet pipe 5. At the same time, the water in the water storage tank 3 is opened by the solenoid valve 7 at the bottom front and directly connected to the water inlet pipe 6 through a pipeline, entering from the bottom input end of the jet mixer 21. The reflux liquid in the reflux tank 4 can be connected to the ammonia water reflux pipe 8 through the solenoid valve 7 at its bottom and participate in the circulation mixing through the water inlet pipe 6, realizing the conveying and proportioning control of liquid ammonia, water and reflux liquid.

[0031] The reflux assembly includes an ammonia reflux pipe 29, the output end of which is fixedly connected to the top of the reflux tank 4. The left output end of the ammonia outlet pipe 17 is fixedly connected to a solenoid valve 29. A branch pipe is fixedly connected to the rear side of the ammonia outlet pipe 17. The input end of the ammonia reflux pipe 29 is fixedly connected to a solenoid valve 30. The input end of the solenoid valve 320 is fixedly connected to the output end of the branch pipe. The reflux tank 4 is fixedly connected to an ammonia reflux pipe 18 via a solenoid valve 17. The output end of the ammonia reflux pipe 18 is fixedly connected to the inlet pipe 6.

[0032] When the reflux assembly is working, when the ammonia water output from the ammonia water outlet pipe 17 needs to be refluxed, the solenoid valve 19 on the left output end is closed, and the branch pipe on the rear side is opened. The ammonia water enters the solenoid valve 20 through the branch pipe and is transported to the reflux tank 4 for storage through the ammonia water reflux pipe 29. The ammonia water in the reflux tank 4 can be opened by the solenoid valve 7 at the bottom and connected to the inlet pipe 6 through the ammonia water reflux pipe 8. After mixing with the fresh water in the storage tank 3, it re-enters the jet mixer 21 to participate in the circulation, realizing the recovery and reprocessing of the ammonia water that does not meet the standards.

[0033] The first cooling component includes a cooling sleeve 23, which is fixedly fitted on the outer surface of the jet mixer 21. A spiral cooling channel 24 is provided inside the cooling sleeve 23. A water inlet 25 and a water outlet 26 are provided on the top right side and bottom left side of the cooling sleeve 23, respectively. Both the water inlet 25 and the water outlet 26 are connected to the spiral cooling channel 24.

[0034] When the first cooling component is working, the cooling medium is injected from the inlet 25 at the top right side of the cooling jacket 23 and flows spirally along the spiral cooling channel 24 on the outer surface of the jet mixer 21. It absorbs the heat generated when liquid ammonia and water are mixed in the jet mixer 21 through heat exchange and finally flows out from the outlet 26 at the bottom left side, forming a cooling cycle and controlling the temperature of the jet mixing process.

[0035] The second cooling assembly includes a second cooling jacket 28. A partition 29 is fixedly connected between the left and right sides of the interior of the second cooling jacket 28. The interior of the second cooling jacket 28 is divided into a first cooling tank 30 and a second cooling tank 31 by the partition 29. Several connecting holes 32 are opened through the left side of the partition 29. The first cooling tank 30 and the second cooling tank 31 are connected through the connecting holes 32. The top and bottom left sides of the second cooling jacket 28 are respectively provided with a second water inlet 33 and a second water outlet 34. The output end of the second water inlet 33 is fixedly connected to the second cooling tank 31, and the input end of the second water outlet 34 is fixedly connected to the first cooling tank 30. Several spiral guide vanes 35 are fixedly connected to the inner surface of the second cooling tank 31.

[0036] When the second cooling component is working, the cooling medium is injected from the inlet 33 on the top left side of the cooling jacket 28 and enters the cooling tank 31. Under the guidance of the spiral guide vanes 35, it forms a spiral flow, increasing the heat exchange area. Then, it flows into the cooling tank 30 through the connecting hole 32 on the partition 29, flows along the outer surface of the static mixer 22, absorbs the heat of the mixing process, and flows out from the outlet 34 on the bottom left side. Through the separation and guiding design, the static mixer 22 is cooled efficiently.

[0037] The vibration damping assembly includes a mounting plate 36, which is fixedly mounted on the top side of the base plate 1. A lifting plate 41 is provided above the mounting plate 36. A lifting mechanism is installed between the mounting plate 36 and the lifting plate 41. Mounting plates 43 are fixedly connected to the top left and right sides of the lifting plate 41. Two sets of clamps 44 are rotatably mounted between the tops of the two sets of mounting plates 43. A limiting plate 45 is fixedly connected between the two sets of mounting plates 43. The bottom sides of the two sets of clamps 44, which are close to each other, abut against the front and rear sides of the limiting plate 45, respectively. The sleeves 44 are respectively set on the bottom front and rear sides of the U-shaped tube 10. The tops of the two sets of sleeves 44 are fixedly connected by bolts. Several sliding rods 46 are slidably passed through the two sets of sleeves 44. A rubber plate 38 is fixedly connected to one end of the sliding rod 46 near the U-shaped tube 10. The side of the rubber plate 38 near the U-shaped tube 10 abuts against the outer surface of the U-shaped tube 10. A limit plate 47 is fixedly connected to the other end of the sliding rod 46 away from the U-shaped tube 10. A spring 39 is sleeved on the sliding rod 46. The two sides of the spring 39 abut against the sleeves 44 and the rubber plate 38 respectively.

[0038] The lifting mechanism includes a lifting cylinder 37, which is fixedly installed on the top side of the mounting plate 36. The output shaft end of the lifting cylinder 37 is fixedly connected to the middle of the bottom side of the lifting plate 41. Two sets of limiting rods 42 are fixedly connected to the top left and right sides of the mounting plate 36, and the top ends of the four sets of limiting rods 42 slide through the four corners of the lifting plate 41.

[0039] When the vibration damping component is working, when the U-shaped tube 10 vibrates, the clamps 44 on the front and rear sides of the bottom abut against the outer surface of the U-shaped tube 10 through the rubber plate 38 on the slide rod 46. The spring 39 is sleeved on the slide rod 46, and its two sides abut against the clamps 44 and the rubber plate 38 respectively. The elastic deformation of the spring 39 absorbs the vibration energy and reduces the vibration transmission. The limiting plate 45 is fixed between the two sets of mounting plates 43, which limits the rotation range of the bottom of the clamp 44 and ensures stable clamping. During the lifting adjustment, the lifting plate 41 is pushed up and down along the four sets of limiting rods 42 by the lifting cylinder 37, thereby adjusting the clamping height of the clamp 44 on the U-shaped tube 10 to adapt to the pipeline position adjustment requirements under different working conditions. The limiting rods 42 ensure that the lifting process is smooth and without tilting.

[0040] A cooling water delivery pump 14 is installed on the left side of the cooling water tank 11. The input end of the cooling water delivery pump 14 is fixedly connected to the cooling water tank 11 through a pipe. The output end of the cooling water delivery pump 14 is fixedly connected to the cooling water inlet pipe 40. The input ends of inlet 1 25 and inlet 2 33 are both fixedly connected to the cooling water inlet pipe 40 through pipes. The output ends of outlet 1 26 and outlet 2 34 are both fixedly connected to the cooling water outlet pipe 12. The output end of the cooling water outlet pipe 12 is fixedly connected to the top of the cooling water tank 11. Several semiconductor cooling chips 15 are installed on the bottom side inside the cooling water tank 11.

[0041] Cooling water pump 14 draws cooling medium from cooling water tank 11 and delivers it to inlet 25 of the first cooling component and inlet 33 of the second cooling component via cooling water inlet pipe 40, providing cooling for jet mixer 21 and static mixer 22. After absorbing heat, the cooling medium flows out from outlet 26 and outlet 34 and returns to the top of cooling water tank 11 via cooling water outlet pipe 12, forming a closed loop. The semiconductor cooling chip 15 at the bottom of cooling water tank 11 cools the cooling medium inside the tank, maintaining its low temperature and ensuring stable cooling effect.

[0042] An insertion-type temperature sensor 27 is installed on the top right side of the jet mixer 21. Its sensing end extends into the interior of the jet mixer 21 to collect temperature data in real time when liquid ammonia and water are initially mixed.

[0043] An ammonia concentration meter 18 is installed on the top right side of the ammonia outlet pipe 17. This meter detects the physical or chemical properties of the ammonia flowing out of the pipe, calculates the ammonia concentration in real time, and feeds the concentration data back to the control system. When the concentration is found to be below standard, the system can activate the reflux assembly to introduce ammonia into the reflux tank 4, achieving online monitoring and closed-loop control of the ammonia concentration.

[0044] Working principle: When this multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water is working, the liquid ammonia in the ammonia storage tank 2 is opened by the solenoid valve 7 at the bottom front and then connected to the input end of the liquid ammonia transfer pump 13 through the pipeline. The liquid ammonia transfer pump 13 pressurizes the liquid ammonia and then delivers it to the right input end of the jet mixer 21 through the liquid ammonia inlet pipe 5. At the same time, the water in the water storage tank 3 is opened by the solenoid valve 7 at the bottom front and directly connected to the water inlet pipe 6 through the pipeline. It enters from the bottom input end of the jet mixer 21. After preliminary mixing in the jet mixer 21, the mixed fluid enters the input end of the static mixer 22. It is further mixed evenly by the static mixer 22. Then, the mixed fluid flows out from the output end of the static mixer 22, through the input end of the right corrugated pipe 16, the U-shaped pipe 10 and the left corrugated pipe 16, and finally outputs the prepared ammonia water from the ammonia water outlet pipe 17.

[0045] During the process, the cooling water transfer pump 14 draws cooling medium from the cooling water tank 11 and delivers it to inlet 25 and inlet 33 via the cooling water inlet pipe 40. After being injected into inlet 25, the cooling medium flows spirally along the spiral cooling channel 24 on the outer surface of the jet mixer 21, absorbing the heat generated when liquid ammonia and water are mixed in the jet mixer 21 through heat exchange. Finally, it flows out from outlet 26 at the bottom left. After being injected into inlet 33, the cooling medium enters the cooling tank 31 and is guided by the spiral guide vanes 35. Under the guidance of the flow, a spiral flow is formed, increasing the heat exchange area. Then, it flows into the cooling tank 30 through the connecting hole 32 on the partition plate 29. After absorbing the heat from the static mixer 22, it flows out from the outlet 34 at the bottom left. The cooling medium flowing out from the outlet 26 and the outlet 34 returns to the top of the cooling water tank 11 through the cooling water outlet pipe 12, forming a closed loop. The semiconductor cooling chip 15 at the bottom of the cooling water tank 11 cools down the cooling medium in the tank, maintains its low temperature, ensures stable cooling effect, and forms a cooling loop.

[0046] When the U-tube 10 vibrates, the clamps 44 on the front and rear sides of the bottom abut against the outer surface of the U-tube 10 through the rubber plate 38 on the slide rod 46. The spring 39 is sleeved on the slide rod 46, and its two sides abut against the clamps 44 and the rubber plate 38 respectively. The elastic deformation of the spring 39 absorbs the vibration energy and reduces the vibration transmission. The limiting plate 45 is fixed between the two sets of mounting plates 43, which limits the rotation range of the bottom of the clamp 44 and ensures the clamping stability. When adjusting the lifting, the lifting plate 41 is pushed up and down along the four sets of limiting rods 42 by the lifting cylinder 37, thereby adjusting the clamping height of the clamp 44 on the U-tube 10 to adapt to the pipeline position adjustment requirements under different working conditions. The limiting rods 42 ensure that the lifting process is smooth and without tilting.

[0047] When the ammonia concentration output from the ammonia outlet pipe 17 is below standard and needs to be returned, the solenoid valve 19 at the left output end closes, the branch pipe at the rear opens, and the ammonia enters the solenoid valve 20 through the branch pipe, and is transported to the return tank 4 for storage through the ammonia return pipe 29. The ammonia in the return tank 4 can be opened by the solenoid valve 7 at the bottom, and connected to the inlet pipe 6 through the ammonia return pipe 8. After mixing with the fresh water in the storage tank 3, it re-enters the jet mixer 21 to participate in the circulation, realizing the recovery and reprocessing of the substandard ammonia through the return tank 4 for circulation mixing.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0049] 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 multi-stage mixing device for preparing ammonia water by mixing liquid ammonia with water, comprising a base plate (1), characterized in that: The ammonia storage tank (2), water storage tank (3), and reflux tank (4) are arranged sequentially from right to left on the top rear side of the base plate (1). The injection mixer (21), static mixer (22), and U-tube (10) are arranged sequentially from right to left on the top middle part of the base plate (1). The cooling water tank (11) is arranged on the top front side of the base plate (1). The output end of the injection mixer (21) and the input end of the static mixer (22) are fixedly connected by flanges. The left and right ends of the U-tube (10) are both fixedly connected by flanges. A corrugated pipe (16) is connected to the output end of the static mixer (22) via a flange. The output end of the corrugated pipe (16) on the left side is fixedly connected to an ammonia water outlet pipe (17) via a flange. A material conveying assembly and a return assembly are provided on the top of the base plate (1). A first cooling assembly is provided on the jet mixer (21). A second cooling assembly is provided on the static mixer (22). A vibration damping assembly is installed at the bottom of the U-shaped pipe (10).

2. The multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 1, characterized in that: The material conveying assembly includes a liquid ammonia transfer pump (13), which is fixedly installed on the top right side of the base plate (1). The right input end of the jet mixer (21) is fixedly connected to a liquid ammonia inlet pipe (5), and the input end of the liquid ammonia inlet pipe (5) is fixedly connected to the output end of the liquid ammonia transfer pump (13). The bottom input end of the jet mixer (21) is fixedly connected to a water inlet pipe (6). The front bottom of the ammonia storage tank (2), the water storage tank (3), and the return tank (4) are all fixedly connected to a solenoid valve (7). The ammonia storage tank (2) is fixedly connected to the liquid ammonia transfer pump (13) through the solenoid valve (7), and the water storage tank (3) is fixedly connected to the water inlet pipe (6) through the solenoid valve (7).

3. The multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 2, characterized in that: The reflux assembly includes an ammonia reflux pipe two (9), the output end of which is fixedly connected to the top of the reflux tank (4), the left output end of the ammonia outlet pipe (17) is fixedly connected to a solenoid valve two (19), the rear side of the ammonia outlet pipe (17) is fixedly connected to a branch pipe, the input end of the ammonia reflux pipe two (9) is fixedly connected to a solenoid valve three (20), the input end of the solenoid valve three (20) is fixedly connected to the output end of the branch pipe, the reflux tank (4) is fixedly connected to an ammonia reflux pipe one (8) through a solenoid valve one (7), and the output end of the ammonia reflux pipe one (8) is fixedly connected to the inlet pipe (6).

4. The multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 1, characterized in that: The first cooling component includes a cooling sleeve (23), which is fixedly fitted on the outer surface of the jet mixer (21). The cooling sleeve (23) has a spiral cooling channel (24) inside. The cooling sleeve (23) has an inlet (25) on the right top and an outlet (26) on the left bottom. The inlet (25) and outlet (26) are connected to the spiral cooling channel (24).

5. The multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 4, characterized in that: The second cooling assembly includes a second cooling jacket (28). A partition (29) is fixedly connected between the left and right sides of the interior of the second cooling jacket (28). The interior of the second cooling jacket (28) is divided into a first cooling tank (30) and a second cooling tank (31) by the partition (29). Several connecting holes (32) are opened through the left side of the partition (29). The first cooling tank (30) and the second cooling tank (31) are connected through the connecting holes (32). The top and bottom left sides of the second cooling jacket (28) are respectively provided with a second water inlet (33) and a second water outlet (34). The output end of the second water inlet (33) is fixedly connected to the second cooling tank (31), and the input end of the second water outlet (34) is fixedly connected to the first cooling tank (30). Several spiral guide vanes (35) are fixedly connected to the inner surface of the second cooling tank (31).

6. The multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 1, characterized in that: The vibration damping assembly includes a mounting plate 1 (36), which is fixedly installed on the top side of the base plate (1). A lifting plate (41) is provided above the mounting plate 1 (36). A lifting mechanism is installed between the mounting plate 1 (36) and the lifting plate (41). Mounting plates 2 (43) are fixedly connected to the top left and right sides of the lifting plate (41). Two sets of clamps (44) are rotatably installed between the tops of the two sets of mounting plates 2 (43). A limiting plate 1 (45) is fixedly connected between the two sets of mounting plates 2 (43). The bottom sides of the two sets of clamps (44) that are close to each other abut against the front and rear sides of the limiting plate 1 (45) respectively. 44) The two sets of sleeves (44) are respectively set on the bottom front and back sides of the U-shaped tube (10). The tops of the two sets of sleeves (44) are fixedly connected by bolts. Several sliding rods (46) are slidably passed through the two sets of sleeves (44). A rubber plate (38) is fixedly connected to one end of the sliding rod (46) near the U-shaped tube (10). The side of the rubber plate (38) near the U-shaped tube (10) abuts against the outer surface of the U-shaped tube (10). A limit plate (47) is fixedly connected to one end of the sliding rod (46) away from the U-shaped tube (10). A spring (39) is sleeved on the sliding rod (46). The two sides of the spring (39) abut against the sleeve (44) and the rubber plate (38) respectively.

7. The multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 6, characterized in that: The lifting mechanism includes a lifting cylinder (37), which is fixedly installed on the top side of the mounting plate (36). The output shaft end of the lifting cylinder (37) is fixedly connected to the middle of the bottom side of the lifting plate (41). Two sets of limiting rods (42) are fixedly connected to the top left and right sides of the mounting plate (36), and the top ends of the four sets of limiting rods (42) slide through the four corners of the lifting plate (41).

8. The multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 5, characterized in that: A cooling water delivery pump (14) is provided on the left side of the cooling water tank (11). The input end of the cooling water delivery pump (14) is fixedly connected to the cooling water tank (11) through a pipe. The output end of the cooling water delivery pump (14) is fixedly connected to a cooling water inlet pipe (40). The input ends of inlet one (25) and inlet two (33) are both fixedly connected to the cooling water inlet pipe (40) through pipes. The output ends of outlet one (26) and outlet two (34) are both fixedly connected to a cooling water outlet pipe (12). The output end of the cooling water outlet pipe (12) is fixedly connected to the top of the cooling water tank (11). Several semiconductor cooling chips (15) are installed on the bottom side inside the cooling water tank (11).

9. A multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 1, characterized in that: An insert-type temperature sensor (27) is installed on the top right side of the jet mixer (21).

10. A multi-stage mixing device for preparing ammonia water by mixing liquid ammonia and water according to claim 1, characterized in that: An ammonia concentration meter (18) is installed on the top right side of the ammonia water outlet pipe (17).

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