A gas protection system and crystallization system
By introducing components such as gas filling and venting channels, pressure regulators, and breather valves into the gas protection system, the problems of unstable pressure and water/oxygen isolation during the melting and crystallization process were solved, thereby improving the purity of chemical materials and the safety of equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-03
- Publication Date
- 2026-08-04
AI Technical Summary
Existing gas protection systems suffer from unstable pressure regulation and lack effective water and oxygen isolation measures during the melting and crystallization process, leading to oxidation and reduced purity of chemical materials, and even posing safety hazards.
A gas protection system is adopted, including an inlet gas channel, a first outlet gas channel, and a second outlet gas channel. It is equipped with a pressure regulator and a shut-off valve. By precisely controlling the venting and discharge of protective gas, combined with a breather valve and a closed gas channel, pressure stability and water and oxygen isolation are achieved to ensure the purity of chemical materials.
It achieves stable control of the gas pressure inside the crystallization equipment, prevents oxygen and moisture from entering the air, ensures the purity of chemical materials and equipment safety, and improves the stability and safety of the melting and crystallization process.
Smart Images
Figure CN224585901U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inert gas protection technology for crystallization and melting equipment, and specifically to a gas protection system and a crystallization system. Background Technology
[0002] If there is no inert gas protection during the purification of chemical materials using a melt crystallizer, the following may occur: (1) oxidation of the internal chemical materials; (2) significant oxidation reaction of the chemical materials under high temperature and high humidity conditions; (3) reaction of some chemical materials with moisture in the air, resulting in low purity of the final product, and even serious safety problems such as the formation of explosive gases due to the mixing of some chemical raw materials with water and oxygen in the air. Therefore, gas protection systems are usually added during the melt crystallization preparation process to protect the equipment and chemical flow when abnormal parameters occur.
[0003] However, current gas protection systems are generally configured such that the nitrogen source is connected to a static pressure storage tank via a pressure regulating valve, and the static pressure storage tank is connected to the exhaust gas main via a purge valve to allow for the introduction of nitrogen (inert gas) and the regulation of internal gas pressure. However, this method has two drawbacks: firstly, the direct connection to the main pipe makes the pressure regulation within the equipment unstable; and secondly, it lacks effective water and oxygen isolation measures. Utility Model Content
[0004] This invention provides a gas protection system and a crystallization system to solve the problems of unstable pressure regulation and lack of effective water and oxygen isolation measures in existing inert gas protection measures.
[0005] To solve the above-mentioned technical problems, the present invention provides a gas protection system for crystallization equipment, wherein the crystallization equipment includes an inlet and at least one outlet; the gas protection system includes: The gas filling end air passage is connected to the gas filling port and the first gas source respectively, and is equipped with one or more first pressure regulators for adjusting the gas pressure value of the gas filling the crystallization equipment.
[0006] A first venting end air passage, which is connected to the vent and is equipped with an air storage tank; and / or a second venting end air passage, which is connected to the vent and is equipped with a first shut-off valve and a first automatic pressure regulator.
[0007] The beneficial effects of the technical solution provided by this utility model compared to the prior art are as follows: When purging the crystallization equipment, protective gas, precisely controlled by a first pressure regulator, is introduced to gradually purge the air inside the equipment. Purging is stopped once the equipment is filled with the protective gas and reaches a preset pressure. When material is added to the crystallization equipment, the continuous addition of material causes the internal protective gas volume to decrease and the gas pressure to increase. Therefore, the first venting end airway, the second venting end airway, or both venting end airways are opened to discharge excess protective gas, thereby ensuring stable internal pressure.
[0008] When two venting channels (first venting channel and second venting channel) are set, the protective gas can be discharged in a timely and stable manner. The first venting channel and the second venting channel can also serve as two redundant channels to ensure that if any channel fails, the other channel can meet the exhaust requirements in a timely manner.
[0009] Furthermore, the first shut-off valve and the first automatic pressure regulator of the second venting end gas duct, along with the gas storage tank of the first venting end gas duct, can isolate the flow of external air, preventing oxygen, moisture, and other contaminants from entering the crystallization equipment and affecting the production purity of the chemical materials. It also ensures that the protective gas is discharged at a stable pressure, maintaining a constant pressure within the crystallization equipment and guaranteeing the purity of the chemical materials.
[0010] In some embodiments, the first venting end air passage includes a breather valve located between the gas storage tank and the crystallization device, wherein the breather valve is configured such that when the crystallization device is under negative pressure, the gas stored in the gas storage tank can be replenished into the crystallization device through the breather valve.
[0011] Using the above technical solution, when the first pressure automatic regulator of the second venting end air passage malfunctions or other abnormal conditions, causing the protective gas in the crystallization equipment to be unable to be discharged in time, resulting in excessively high pressure in the crystallization equipment, the above-mentioned breathing valve is added so that the protective gas can be discharged through the breathing valve.
[0012] Furthermore, compared to conventional technologies where the gas storage tank is equipped with a general breather valve that comes into contact with air: the breather valve comes into contact with air, and when the pressure inside the crystallization equipment is too high, it discharges the protective gas inside the crystallization equipment into the atmosphere or the exhaust gas treatment system. When the crystallization equipment is under negative pressure, it will draw in air. Although this avoids damage to the crystallization equipment, the air drawn in will cause the chemical materials to oxidize and reduce purity. The above-mentioned breather valve configuration can ensure that the gas drawn into the equipment is the protective gas stored in the gas storage tank, thereby isolating water and oxygen from the air to enter and ensuring the production purity of the chemical logistics.
[0013] Furthermore, a second shut-off valve is provided between the breathing valve and the gas storage tank to adjust the on / off state and improve the flexibility of the first venting end air passage of the gas protection system.
[0014] In some embodiments, the gas protection system further includes a closed gas passage, which is connected to both the first venting end gas passage and the second venting end gas passage, and a third shut-off valve is provided on the side of the closed gas passage connected to the first venting end gas passage. By adopting the above technical solution, the addition of a closed gas passage allows the first venting end gas passage and the second venting end gas passage to be connected according to exhaust requirements, thereby further improving the flexibility of the gas protection system. In some embodiments, the closed gas passage is equipped with a second automatic pressure regulator.
[0015] In some embodiments, the second venting end air passage is further provided with a fourth shut-off valve, which is located between the closed air passage and the venting port, wherein the first automatic pressure regulator is located between the fourth shut-off valve and the closed air passage.
[0016] In some implementations, a second gas source and a second pressure regulator are provided on the side of the first venting end air passage away from the vent, which is connected to the gas storage tank. The second pressure regulator is used to adjust the gas pressure value of the second gas source filling the gas storage tank.
[0017] By adopting the above technical solution, protective gas is introduced into the gas storage tank through a second gas source before the equipment is put into operation, and the air in the gas storage tank is exhausted to ensure that the gas drawn in when the crystallization equipment is under negative pressure is protective gas.
[0018] In some implementations, the first venting end air passage is further equipped with a pump body connected to the gas storage tank. By adopting the above technical solution, the addition of a pump body enhances the gas delivery capacity, facilitating auxiliary venting when the gas pressure inside the crystallization equipment is too high, thus ensuring the safe operation of the crystallization equipment.
[0019] In some implementations, the inflation end air passage, the first deflation end air passage, and / or the second deflation end air passage are connected to a filter; wherein, when the gas storage tank is connected to the second gas source, the filter is also connected between the second gas source and the gas storage tank.
[0020] By adopting the above technical solution, by connecting filters to the gas inlet, the first gas outlet, and the second gas outlet, and by also connecting a filter between the gas storage tank and the second gas source, the purity of the gas can be improved, ensuring that the gas filled in each component of the gas protection system is protective gas, thereby reducing interference from impurities.
[0021] In some embodiments, this application also provides a crystallization system, including the above-described gas protection system and crystallization equipment, wherein the gas supplied to the crystallization equipment by the gas protection system is nitrogen, argon, or hydrogen.
[0022] By adopting the above technical solution, the crystallization system can adapt to various gases such as nitrogen, argon or hydrogen as protective gases. The deployment of the above gas protection system ensures the stability of the crystallization equipment and the purity of the internal chemical logistics during the crystallization process. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a connection diagram of an embodiment of the gas protection system provided by this utility model. Figure 1 ; Figure 2 This is a connection diagram of an embodiment of the gas protection system provided by this utility model. Figure 2 ; Figure 3 This is a connection diagram of an embodiment of the gas inlet passage 20 of a gas protection system provided by this utility model; Figure 4 This is a partial connection diagram of an embodiment of a gas protection system provided by this utility model.
[0024] In the picture: 1. Crystallization equipment; 10. Gas inlet; 11. Gas outlet; 20. Gas inlet end air passage; 21. First gas source; 22. First pressure regulator; 23. Fifth shut-off valve; 30. First gas outlet end air passage; 31. Gas storage tank; 32. Breathing valve; 33. Second shut-off valve; 34. Second gas source; 35. Second pressure regulator; 36. Pump body; 37. Sixth shut-off valve; 40. Second venting end air passage; 41. First shut-off valve; 42. First automatic pressure regulator; 43. Fourth shut-off valve; 50. Closed air passage; 51. Third shut-off valve; 52. Second automatic pressure regulator; 60. Filter. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0026] It is worth noting that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0027] See Figures 1 to 2 As shown, Figure 1 A connection diagram of an embodiment of a gas protection system provided in this application is shown. Figure 1 ; Figure 2 A connection diagram of an embodiment of a gas protection system provided in this application is shown. Figure 2 .
[0028] In some embodiments, the crystallization apparatus 1 includes an inlet 10 and at least one outlet 11, and the gas protection system for the crystallization apparatus 1 includes: The gas filling end gas passage 20 is connected to the gas filling port 10 and the first gas source 21 respectively, and is equipped with one or more first pressure regulators 22 for adjusting the gas pressure value of the gas filling into the crystallization device 1. The first venting end gas passage 30 is connected to the venting port 11 and is equipped with a gas storage tank 31.
[0029] The second venting end air passage 40 is connected to the venting port 11 and is equipped with a first shut-off valve 41 and a first automatic pressure regulator 42.
[0030] In this embodiment, when the crystallization device 1 is pressurized, the air inside the crystallization device 1 is gradually emptied by introducing a protective gas precisely controlled by the first pressure regulator 22. Pressurization is stopped when the crystallization device 1 is filled with the protective gas and reaches a preset pressure. For example, the inlet pressure of the protective gas can be 0.6 MPa to 0.8 MPa. Figure 3 As shown, Figure 3 This diagram illustrates a connection of the gas inlet duct 20 of a gas protection system provided in this application. Protective gas is supplied from a first gas source 21, sequentially passing through a first pressure regulator 22 and a fifth shut-off valve 23 before entering the crystallization device 1. In one application scenario, the fifth shut-off valve 23 is fully open, and the first pressure regulator 22 reduces the gas pressure to 1 kPa to 2 kPa to ensure that the air inside the crystallization device 1 is exhausted.
[0031] When materials are added to the crystallization equipment 1, the volume of the internal protective gas decreases and the gas pressure increases as materials are continuously added. The first venting end gas passage 30 or the second venting end gas passage 40 is opened, or both the first venting end gas passage 30 and the second venting end gas passage 40 are opened simultaneously, to discharge the excess protective gas, thereby ensuring the stability of the internal pressure of the crystallization equipment 1.
[0032] When two venting channels (first venting channel 30 and second venting channel 40) are set, the protective gas can be discharged in a timely and stable manner. The first venting channel 30 and the second venting channel 40 serve as redundant channels to ensure that if any channel fails, the other channel can meet the exhaust requirements in a timely manner.
[0033] For example, when the pressure inside the equipment reaches the set pressure value, the first pressure regulator 22 is used to stop the charging of protective gas from the first gas source 21. In one application scenario, when the pressure inside the equipment exceeds the set pressure threshold (e.g., 3 kPa), the first automatic pressure regulator 42 can automatically open to discharge excess protective gas from the crystallization equipment 1.
[0034] The first shut-off valve 41 and the first automatic pressure regulator 42 of the second venting end gas duct 40, together with the gas storage tank 31 of the first venting end gas duct 30, can isolate the flow of external air, preventing oxygen, moisture, and other substances in the air from entering the crystallization equipment 1 and affecting the production purity of the chemical materials. It also ensures that the protective gas is discharged at a stable pressure, maintaining a constant pressure value within the crystallization equipment 1 and ensuring the purity of the chemical materials.
[0035] The first pressure regulator 22 can be a pressure regulating valve. The first shut-off valve 41 and the following shut-off valves are used to control the flow of gas. They are divided into open and closed states to adjust the flow and closure of the gas passage. The first automatic pressure regulator 42 can be a self-regulating valve to automatically adjust the valve opening according to the gas pressure value to achieve the stability of the gas pressure value.
[0036] In some implementation schemes, further integration Figure 4 As shown, Figure 4 A partial connection diagram of an embodiment of a gas protection system provided in this application is shown. The first venting end gas passage 30 includes a breather valve 32 located between the gas storage tank 31 and the crystallization device 1, wherein the breather valve 32 is configured such that when the crystallization device 1 is under negative pressure, the gas stored in the gas storage tank 31 can be replenished into the crystallization device 1 through the breather valve 32.
[0037] In this embodiment, when the first pressure automatic regulator 42 of the second venting end air passage 40 malfunctions or other abnormal conditions, causing the protective gas in the crystallization equipment 1 to be unable to be discharged in time, resulting in excessive pressure in the crystallization equipment 1, the above-mentioned breathing valve 32 is added so that the protective gas can be discharged through the breathing valve 32.
[0038] Furthermore, compared to conventional technologies where the gas storage tank 31 is equipped with a general breathing valve 32 that comes into contact with air: the breathing valve 32 comes into contact with air, and when the pressure inside the crystallization equipment 1 is too high, it discharges the protective gas inside the crystallization equipment 1 into the atmosphere or the exhaust gas treatment system. When the crystallization equipment 1 is under negative pressure, it will draw in air. Although this avoids damage to the crystallization equipment 1, the air drawn in will cause the chemical materials to oxidize and reduce purity. The above-mentioned breathing valve 32 configuration can ensure that the gas drawn into the equipment is the protective gas stored in the gas storage tank 31, thereby isolating the entry of water and oxygen in the air to ensure the production purity of the chemical logistics.
[0039] Furthermore, a second shut-off valve 33 is provided between the breather valve 32 and the gas storage tank 31 to adjust the on / off state and improve the flexibility of the first venting end air passage 30 of the gas protection system. For example, the breather valve 32 can be activated when the expected limit pressure value (e.g., set to 3 kPa) is exceeded or when the expected low pressure value (e.g., set to 1 kPa) is lowered. When the expected limit pressure value is exceeded, the breather valve 32 is activated and the protective gas is directly discharged to the exhaust gas treatment system.
[0040] In some embodiments, the gas protection system further includes a closed gas passage 50, which is connected to the first venting end gas passage 30 and the second venting end gas passage 40, respectively. A third shut-off valve 51 is provided on the side of the closed gas passage 50 connected to the first venting end gas passage 30. In this embodiment, the closed gas passage 50 is added so that the first venting end gas passage 30 and the second venting end gas passage 40 can be connected according to the exhaust requirements, thereby further improving the flexibility of the gas protection system. In some embodiments, the closed gas passage 50 is provided with a second automatic pressure regulator 52. In one application scenario, if the first automatic pressure regulator 42 fails, that is, if the protective gas cannot be discharged in time, causing the pressure value inside the crystallization equipment 1 to be too high, the protective gas can be discharged through the aforementioned breather valve 32.
[0041] In some implementations, the second venting end air passage 40 is also provided with a fourth shut-off valve 43, which is located between the closed air passage 50 and the venting port 11. The first pressure automatic regulator 42 is located between the fourth shut-off valve 43 and the closed air passage 50.
[0042] In some implementations, a second gas source 34 and a second pressure regulator 35 connected to the gas storage tank 31 are also provided on the side of the first venting end gas passage 30 away from the venting port 11. The second pressure regulator 35 is used to adjust the gas pressure value of the second gas source 34 filling the gas storage tank 31.
[0043] In this embodiment, before the equipment operates, protective gas is introduced into the gas storage tank 31 through the second gas source 34, and the air in the gas storage tank 31 is exhausted to ensure that the gas drawn into the crystallization equipment 1 under negative pressure is protective gas. For example, the second pressure regulator 35 can be set to a state transition pressure value. If the state transition pressure value is set to 2 kPa, then when the air in the gas storage tank 31 is exhausted and filled with protective gas, the second shut-off valve 33 is opened. The first venting end gas passage 30 is also provided with a sixth shut-off valve 37 on the side connected to the second gas source 34.
[0044] In some embodiments, the first venting end air passage 30 is further provided with a pump body 36 connected to the gas storage tank 31. In this embodiment, the pump body 36 is added to enhance the gas delivery capacity, facilitating auxiliary venting when the gas pressure inside the crystallization equipment 1 is too high, and ensuring the safe operation of the crystallization equipment 1. For example, when the pressure inside the crystallization equipment 1 is too high (e.g., the pressure value exceeds 10 kPa), the aforementioned pump body 36 is activated to enhance venting efficiency and improve equipment safety. The aforementioned pump body 36 is a vacuum pump.
[0045] In some implementations, the inflation end air passage 20, the first deflation end air passage 30 and / or the second deflation end air passage 40 are connected to a filter 60; wherein, when the gas storage tank 31 is connected to the second gas source 34, a filter 60 is also connected between the second gas source 34 and the gas storage tank 31.
[0046] In this embodiment of the application, by connecting a filter 60 to the inflation end air passage 20, the first deflation end air passage 30 and the second deflation end air passage 40, and also connecting a filter 60 between the gas storage tank 31 and the second gas source 34, the purity of the gas can be improved, ensuring that the gas filled in each component of the gas protection system is a protective gas, so as to reduce the interference of impurities.
[0047] In some embodiments, this application also provides a crystallization system, including the gas protection system and crystallization device 1 described above, wherein the gas supplied to the crystallization device 1 by the gas protection system is nitrogen, argon or hydrogen.
[0048] In this embodiment, the crystallization system can be adapted to use a variety of gases such as nitrogen, argon or hydrogen as protective gases. The arrangement of the gas protection system ensures the stability of the crystallization equipment 1 and the purity of the internal chemical flow during the crystallization process.
[0049] The above description is merely an embodiment of this utility model and does 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, should be included within the protection scope of this utility model.
Claims
1. A gas protection system for a crystallization device, wherein, The crystallization equipment includes an inlet and at least one outlet, characterized in that it includes: The gas filling end air passage is connected to the gas filling port and the first gas source respectively, and is equipped with one or more first pressure regulators for adjusting the gas pressure value of the gas filling the crystallization equipment; The first venting end air passage is connected to the venting port and is equipped with an air storage tank. and / or The second venting end air passage is connected to the venting port and is equipped with a first shut-off valve and a first automatic pressure regulator.
2. The gas protection system according to claim 1, characterized in that, The first venting end air passage includes a breather valve located between the gas storage tank and the crystallization device, wherein the breather valve is configured such that when the crystallization device is under negative pressure, the gas stored in the gas storage tank can be replenished into the crystallization device through the breather valve.
3. The gas protection system according to claim 2, characterized in that, A second shut-off valve is also provided between the breathing valve and the gas storage tank.
4. The gas protection system according to claim 1, characterized in that, The gas protection system also includes a closed gas passage, which is connected to the first venting end gas passage and the second venting end gas passage respectively, and a third shut-off valve is provided on the side of the closed gas passage connected to the first venting end gas passage.
5. The gas protection system according to claim 4, characterized in that, The closed airway is equipped with a second automatic pressure regulator.
6. The gas protection system according to claim 4, characterized in that, The second venting end air passage is also provided with a fourth shut-off valve, which is located between the closed air passage and the venting port. The first automatic pressure regulator is located between the fourth shut-off valve and the closed air passage.
7. The gas protection system according to claim 1, characterized in that, On the side of the first venting end air passage away from the vent, there is also a second air source and a second pressure regulator that are connected to the air storage tank. The second pressure regulator is used to adjust the gas pressure value of the second air source filling the air storage tank.
8. The gas protection system according to claim 1, characterized in that, The first venting end air passage is also equipped with a pump body connected to the air storage tank.
9. The gas protection system according to any one of claims 1 to 8, characterized in that, The inflation end air passage, the first deflation end air passage, and / or the second deflation end air passage are connected to a filter; wherein, when the gas storage tank is connected to the second gas source, the second gas source and the gas storage tank are also connected to the filter.
10. A crystallization system, characterized in that, The invention includes the gas protection system and crystallization apparatus according to any one of claims 1 to 9, wherein the gas supplied to the crystallization apparatus by the gas protection system is nitrogen, argon or hydrogen.