A pipeline descaling system for hydrogen fluoride production

Abstract

The utility model relates to hydrogen fluoride production technical field discloses a pipeline descaling system for hydrogen fluoride production, include: evaporative cooling device has the accommodation cavity, fills with domestic water in the accommodation cavity, the cooling pipe inside fills with freon, first pipeline sets up the outside of evaporative cooling device, the import of first pipeline communicates with the below outside end surface of evaporative cooling device, and the export of first pipeline communicates with the outside end surface of the above of evaporative cooling device, first pipeline circulates domestic water through the drive part, and the parallelly connected setting of permanent magnet descaling device is in first pipeline, the utility model discloses through setting permanent magnet descaling device, utilizes the magnetic field effect, changes the scale layer crystallization form, makes it difficult to adhere to the pipe wall, the freon in cooling pipe can more efficiently carry out the cooling at this moment, and the heat exchange effect is high.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen fluoride production technology, specifically to a pipeline descaling system for hydrogen fluoride production. Background Technology

[0002] In the process of producing anhydrous hydrogen fluoride from fluorite and sulfuric acid, ethylene glycol is used as a refrigerant and is transported to various main equipment through the refrigeration station to cool the anhydrous hydrogen fluoride gas. The used ethylene glycol is returned to the refrigeration station and recycled by the ice machine with the help of Freon. The cooling of Freon is achieved by the circulation of production water on the outer wall of the evaporative cooling tube.

[0003] During actual operation, the outer wall of the evaporative cooling coils is prone to scale buildup due to prolonged contact with cooling water containing impurities. This scale accumulation not only hinders heat transfer between ethylene glycol and Freon but also significantly reduces the cooling effect of the production water on the Freon. As a critical refrigerant, the reduced cooling effect of Freon directly impacts the cooling efficiency of the ethylene glycol refrigerant.

[0004] Impaired cooling performance of ethylene glycol refrigerant in the system will have a cascading effect on a series of chemical processes, including condensation, distillation, and degassing. Therefore, scale formation not only reduces the overall system efficiency but also ultimately negatively impacts product quality and stability. Summary of the Invention

[0005] In view of this, the present invention provides a pipeline descaling system for hydrogen fluoride production to solve the problem that scale easily forms on the outer wall of evaporative cooling tubes in the prior art, leading to a decrease in heat exchange efficiency.

[0006] This utility model provides a pipeline descaling system for hydrogen fluoride production, comprising: an evaporative cooling device having a receiving cavity filled with domestic water;

[0007] A cooling pipe, filled with coolant, is partially disposed within the receiving cavity of the evaporative cooling device, and the cooling pipe is spirally arranged.

[0008] The cooling pipe has an inlet and an outlet, which are located outside the evaporative cooling device. The inlet of the cooling pipe is used to connect to an ice machine, and the outlet of the cooling pipe is used to connect to an ice machine.

[0009] A first pipeline is disposed on the outside of the evaporative cooling device. The inlet of the first pipeline is connected to the lower outer end face of the evaporative cooling device, and the outlet of the first pipeline is connected to the upper outer end face of the evaporative cooling device. The first pipeline circulates the domestic water through a driving component.

[0010] A permanent magnet descaling device is connected in parallel on the first pipeline.

[0011] By setting up a permanent magnet descaling device, the magnetic field effect is used to change the crystal morphology of the scale layer, making it difficult for it to adhere to the pipe wall. At this time, the Freon in the cooling pipe can cool down more efficiently, resulting in high heat exchange efficiency, thereby extending the service life of the equipment, reducing the frequency of maintenance, reducing production costs, and ensuring the long-term stable operation of the system.

[0012] In one optional embodiment, the permanent magnet descaling device includes: a housing, a second pipeline, and a plurality of permanent magnets. The inlet and outlet of the second pipeline are connected to the first pipeline. The housing contains the second pipeline, and the housing contains a plurality of permanent magnets on both sides of the extension direction of the second pipeline. The permanent magnets form a magnetic field perpendicular to the water flow direction of the second pipeline.

[0013] When domestic water from the first pipeline enters the second pipeline, the permanent magnet polarizes the mineral ions in the domestic water.

[0014] By setting up a permanent magnet descaling device, which includes a shell, a second pipeline, and multiple permanent magnets, when domestic water from the first pipeline enters the second pipeline, the permanent magnets polarize mineral ions, effectively preventing scale formation, further improving cooling efficiency, and ensuring efficient and stable system operation.

[0015] In one alternative embodiment, the first pipeline is provided with a plurality of nozzles within the evaporative cooling device, the nozzles spraying in a direction toward the cooling pipe.

[0016] By installing multiple nozzles in the first pipeline of the evaporative cooling device, domestic water is evenly sprayed onto the surface of the cooling pipe, enhancing the heat exchange effect and avoiding local overheating, thus ensuring that the overall system operates more efficiently and stably.

[0017] In one alternative embodiment, a switching valve is provided on the second pipeline.

[0018] By setting up on / off valves, the start and stop of the permanent magnet descaling device can be flexibly controlled, which facilitates maintenance and adjustment, further optimizes the system operation status, and improves overall efficiency.

[0019] In one alternative implementation, the driving element is a diaphragm pump.

[0020] By precisely controlling the diaphragm pump, the flow rate of domestic water circulation is ensured to be stable, thereby improving system operating efficiency and reducing energy consumption.

[0021] In one alternative embodiment, the evaporative cooling device has two side-by-side cavities that are interconnected.

[0022] By setting up two evaporative cooling devices, a larger cooling area is achieved, improving the overall heat exchange efficiency. At the same time, the interconnected chambers ensure smooth water flow, avoiding local blockages and further enhancing the system's stability and cooling performance.

[0023] In one alternative embodiment, the cooling pipe has an inlet and an outlet, the inlet and outlet of which are located outside the evaporative cooling device, the inlet of which is used to connect to an ice machine, and the outlet of which is used to connect to an ice machine.

[0024] By connecting the inlet and outlet of the cooling pipe to the ice machine, efficient refrigerant circulation is achieved, optimizing the heat exchange process and further improving the overall cooling performance and operational stability of the system. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a front view of a pipeline descaling system for hydrogen fluoride production according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Evaporative cooling device; 2. Receiving cavity; 3. Cooling pipe; 4. First pipeline; 5. Permanent magnet descaling device; 6. Ice machine; 7. Drive component; 8. Second pipeline; 9. Permanent magnet. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] like Figure 1As shown, according to an embodiment of the present invention, a pipeline descaling system for hydrogen fluoride production is provided, comprising: an evaporative cooling device 1, which is a piece of equipment in the production and processing of hydrogen fluoride. The working principle of the evaporative cooling device 1 is to utilize the heat absorption characteristics of water evaporation, combined with air convection, to cool down the Freon that needs to be cooled. The evaporative cooling device 1 has a receiving cavity 2 filled with domestic water; the cooling pipe 3 is filled with coolant, which is Freon, and a part of the cooling pipe 3 is arranged in the receiving cavity 2 of the evaporative cooling device 1, with the cooling pipe 3 spirally arranged; the cooling pipe 3 has an inlet and an outlet, which are located on the outside of the evaporative cooling device 1, the inlet of the cooling pipe 3 is used to connect to the ice machine 6, and the outlet of the cooling pipe 3 is used to connect to the ice machine 6; the first pipe 4 is located on the outside of the evaporative cooling device 1, and the first pipe 4 is used to pump water from the bottom of the evaporative cooling device 1 to the top and spray it downwards, the inlet of the first pipe 4 is connected to the lower outer end face of the evaporative cooling device 1, and the outlet of the first pipe 4 is connected to the upper outer end face of the evaporative cooling device 1; the first pipe 4 circulates the domestic water through the driving component 7;

[0031] A permanent magnet descaling device 5 is connected in parallel on the first pipeline 4. By setting up the permanent magnet descaling device 5, the magnetic field effect is used to change the crystal morphology of the scale layer, making it difficult for it to adhere to the pipe wall. At this time, the Freon in the cooling pipe 3 can cool down more efficiently, resulting in high heat exchange efficiency, thereby extending the service life of the equipment, reducing the maintenance frequency, reducing production costs, and ensuring the long-term stable operation of the system.

[0032] Alternatively, the coolant can be made of other materials, such as ammonia or difluoromethane refrigerant.

[0033] Specifically, the evaporative cooling device 1 is equipped with a fan. The fan introduces air to accelerate the evaporation of domestic water, carrying away the heat and water vapor generated during evaporation, thereby further improving the cooling effect. The installation location of the fan is in the existing design and will not be described in detail in this embodiment.

[0034] like Figure 1 As shown, in this embodiment, the permanent magnet descaling device 5 includes: a shell, a second pipeline 8 and a plurality of permanent magnets 9. The inlet and outlet of the second pipeline 8 are connected to the first pipeline 4. The second pipeline 8 is provided inside the shell. A plurality of permanent magnets 9 are provided on both sides of the shell in the extension direction of the second pipeline 8. The permanent magnets 9 form a magnetic field perpendicular to the water flow direction of the second pipeline 8.

[0035] When domestic water from the first pipe 4 enters the second pipe 8, the permanent magnet 9 polarizes the mineral ions in the domestic water. By setting up the permanent magnet descaling device 5, when domestic water from the first pipe 4 enters the second pipe 8, the permanent magnet 9 polarizes the mineral ions, effectively preventing scale formation, further improving cooling efficiency, and ensuring efficient and stable system operation. It should be noted that, as an alternative implementation, the permanent magnet descaling device 5 can also include a magnetic shielding device. The magnetic shielding device can be installed outside the housing to shield the permanent magnet 9 from interference from external magnetic fields, ensuring the stability of the magnetic field formed by the permanent magnet 9, thereby improving the descaling effect. The magnetic shielding device can be made of highly permeable magnetic materials, such as soft iron or silicon steel sheets. These materials can effectively guide magnetic field lines, reduce magnetic field leakage, and protect the permanent magnet 9 from the influence of external magnetic fields.

[0036] Specifically, mineral ions, such as calcium and magnesium ions, undergo polarization under the influence of a strong magnetic field: the outer electron orbitals of the ions shift, weakening their ability to bind with carbonate (CO32-) and sulfate (SO42-) ions in water. This results in the formation of loose "aragonite" or "spherulite" crystals, which are the metastable form of calcium carbonate, appearing as powder or flocculent material and not easily adhering to pipe walls.

[0037] Specifically, the permanent magnet 9 uses high-performance rare-earth permanent magnet material neodymium iron boron (NdFeB). The permanent magnets 9 are arranged in a linear array within the shell along the extension direction of the second pipe 8 to form a semi-closed magnetic circuit. The paired N and S poles of the permanent magnets 9 are positioned opposite each other, creating a uniform, high-intensity magnetic field region within the water flow channel, ensuring that ions in the water flow are fully magnetized. The magnetic field strength at the center of the magnetized core is at least greater than 10,000 Gauss.

[0038] When water flows through a vertical dividing line with a magnetic field strength of at least 10,000 Gauss, the water molecules change to form magnetized water. The crystal state of the scale molecules in the water changes from an orthorhombic crystal system (dense and hard) to a monoclinic crystal system (soft and sparse, not easy to adhere). This can gradually remove old scale from the system without generating new scale, significantly reducing scaling in the tubes and improving heat exchange efficiency by 10%.

[0039] Specifically, the second pipe 8 is a round pipe made of non-magnetic stainless steel. The flow rate of domestic water is 200 m³ / h.

[0040] like Figure 1As shown, in this embodiment, the first pipe 4 is equipped with multiple nozzles within the evaporative cooling device 1. The nozzles spray water downwards towards the cooling pipe 3, forming a water mist. The evaporation of the water mist carries away a significant amount of heat, further enhancing the cooling effect. Furthermore, multiple nozzles are used to ensure optimal water mist coverage and cooling efficiency. By installing multiple nozzles in the first pipe 4 within the evaporative cooling device 1, the water is evenly sprayed onto the surface of the cooling pipe 3, enhancing the heat exchange effect while preventing localized overheating, ensuring more efficient and stable overall system operation. It should be noted that, as an alternative implementation, the multiple nozzles can be arranged in a straight line along the length of the evaporative cooling device 1, or they can be arranged in a circular array.

[0041] like Figure 1 As shown, in this embodiment, a switch valve is installed on the second pipeline 8. By installing the switch valve, the start and stop of the permanent magnet descaling device 5 can be flexibly controlled, facilitating maintenance and adjustment, further optimizing the system's operating status, and improving overall efficiency. Specifically, the switch valve is a manual butterfly valve, which is easy to operate and responds quickly, ensuring rapid shut-off or connection of water flow when needed. It should be noted that, as an alternative implementation, the switch valve can also be set as an electric valve, which can be remotely controlled.

[0042] like Figure 1 As shown, in this embodiment, the drive component 7 is a diaphragm pump. Precise control of the diaphragm pump ensures a stable domestic water circulation flow rate, improves system operating efficiency, and reduces energy consumption. Specifically, the drive component 7 can also be a centrifugal pump, featuring high head and low noise, adapting to different operating conditions and ensuring stable water pressure.

[0043] like Figure 1 As shown, in this embodiment, the evaporative cooling device 1 has two arranged side by side, with the receiving cavities 2 of the two adjacent evaporative cooling devices 1 interconnected. Each of the two receiving cavities 2 of the evaporative cooling devices 1 is equipped with two cooling pipes 3 and two permanent magnet descaling devices 5. By setting two evaporative cooling devices 1, a larger cooling area is achieved, improving the overall heat exchange efficiency. Simultaneously, the interconnected receiving cavities 2 ensure smooth water flow, avoiding local blockages, and further enhancing the system's stability and cooling efficiency. It should be noted that, as an alternative implementation, only one evaporative cooling device can be provided, equipped with only one permanent magnet descaling device 5 interface.

[0044] like Figure 1As shown, in this embodiment, the cooling pipe 3 has an inlet and an outlet. The inlet and outlet of the cooling pipe 3 are located outside the evaporative cooling device 1. The inlet of the cooling pipe 3 is used to connect to the ice machine 6, and the outlet of the cooling pipe 3 is used to connect to the ice machine 6. By connecting the inlet and outlet of the cooling pipe 3 to the ice machine 6, efficient connection of the refrigerant circulation is achieved, the heat exchange process is optimized, and the overall cooling performance and operational stability of the system are further improved.

[0045] Specifically, the ice machine 6 refers to the equipment used to circulate Freon, driving the Freon to circulate within the cooling pipe 3.

[0046] Installation method of the pipeline descaling system for hydrogen fluoride production: Evaporative cooling device 1 is connected to cooling pipe 3, ensuring that the inlet and outlet of cooling pipe 3 are connected to ice machine 6 to achieve refrigerant circulation. A fan is installed on evaporative cooling device 1 to ensure that air is introduced to accelerate the evaporation of domestic water. A first pipeline 4 is installed inside evaporative cooling device 1, ensuring that the inlet of the first pipeline 4 is connected to the lower outer end face of evaporative cooling device 1, and the outlet is connected to the upper outer end face of evaporative cooling device 1. A nozzle is installed above evaporative cooling device 1 on the first pipeline 4 to ensure that domestic water is sprayed downwards to form a water mist. A permanent magnet descaling device 5 is installed on the first pipeline 4, ensuring that the permanent magnet descaling device 5 is connected to the first pipeline 4. Multiple permanent magnets 9 are installed inside the housing of the permanent magnet descaling device 5 to ensure that the permanent magnets 9 form a magnetic field perpendicular to the water flow direction of the second pipeline 8.

[0047] Working principle: Domestic water forms water mist in the receiving chamber 2 of the evaporative cooling device 1. At the same time, the fan introduces air to accelerate the evaporation of domestic water, carrying away the heat and water vapor from the evaporation, thus achieving a cooling effect. The first pipeline 4 circulates the domestic water through the drive component 7 to ensure a continuous and stable cooling effect.

[0048] When domestic water enters the second pipe 8, the permanent magnet 9 polarizes the mineral ions in the water, changing the crystal morphology of the scale layer and making it difficult for it to adhere to the pipe wall. The permanent magnet 9 uses high-performance rare-earth permanent magnet material neodymium iron boron (NdFeB) to form a uniform, high-intensity magnetic field region, ensuring that the ions in the water flow are fully magnetized. The magnetized water molecules change, and the crystal state of the scale molecules changes from an orthorhombic crystal system to a monoclinic crystal system, which can gradually remove old scale from the system without forming new scale.

[0049] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pipeline descaling system for hydrogen fluoride production, characterized in that, include: An evaporative cooling device (1) has a receiving cavity (2) filled with domestic water; Cooling pipe (3) is filled with coolant. A portion of the cooling pipe (3) is disposed in the receiving cavity (2) of the evaporative cooling device (1). The cooling pipe (3) is spirally arranged. The first pipe (4) is located outside the evaporative cooling device (1). The inlet of the first pipe (4) is connected to the lower outer end face of the evaporative cooling device (1), and the outlet of the first pipe (4) is connected to the upper outer end face of the evaporative cooling device (1). The first pipe (4) circulates the domestic water through the driving component (7). A permanent magnet descaling device (5) is connected in parallel on the first pipeline (4).

2. The pipeline descaling system for hydrogen fluoride production according to claim 1, characterized in that, The permanent magnet descaling device (5) includes: a shell, a second pipeline (8) and a plurality of permanent magnets (9). The inlet and outlet of the second pipeline (8) are connected to the first pipeline (4). The second pipeline (8) is provided inside the shell. A plurality of permanent magnets (9) are provided on both sides of the extension direction of the second pipeline (8) inside the shell. The permanent magnets (9) form a magnetic field perpendicular to the water flow direction of the second pipeline (8). When the domestic water in the first pipeline (4) enters the second pipeline (8), the permanent magnet (9) polarizes the mineral ions in the domestic water.

3. The pipeline descaling system for hydrogen fluoride production according to claim 2, characterized in that, The first pipeline (4) is provided with multiple nozzles in the evaporative cooling device (1), and the spray direction of the nozzles is towards the cooling pipe (3).

4. The pipeline descaling system for hydrogen fluoride production according to claim 3, characterized in that, A switch valve is installed on the second pipeline (8).

5. The pipeline descaling system for hydrogen fluoride production according to claim 3, characterized in that, The drive unit (7) is a diaphragm pump.

6. The pipeline descaling system for hydrogen fluoride production according to any one of claims 1-5, characterized in that, The evaporative cooling device (1) has two side-by-side cavities (2) that are connected to each other.

7. The pipeline descaling system for hydrogen fluoride production according to any one of claims 1-5, characterized in that, The cooling pipe (3) has an inlet and an outlet, the inlet and outlet of the cooling pipe (3) are located outside the evaporative cooling device (1), the inlet of the cooling pipe (3) is used to connect to the ice machine (6), and the outlet of the cooling pipe (3) is used to connect to the ice machine (6).

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