Environment-friendly and energy-saving light removal column and process for producing diborane using the same

Abstract

This invention discloses a light-light residue removal tower for the production of high-purity borane, relating to the field of light-light residue removal tower technology. It includes a main structure comprising a tower body, a condenser at the top of the tower body cavity, an upper pressure plate at the bottom of the condenser, a lower pressure plate at the bottom of the upper pressure plate, and a redistributor at the bottom of the lower pressure plate. Through the design of a self-cleaning component, it can automatically clean clogged filter plates without manual intervention, effectively solving the problem of filter clogging caused by impurity deposition. The synergistic action of components such as cleaning rollers, helical toothed rings, and gears effectively removes stubborn impurities such as firmly attached solid particles and polymers from the filter plate surface, ensuring the normal filtration function of the filter plates and maintaining efficient gas-liquid mass transfer within the light-light residue removal tower. Simultaneously, it avoids the drawback of traditional manual cleaning requiring machine shutdown, achieving continuous production of the light-light residue removal tower.

Description

Technical Field

[0001] This invention relates to the field of light-light removal tower technology, specifically to an environmentally friendly and energy-saving light-light removal tower, and more specifically to an environmentally friendly and energy-saving light-light removal tower suitable for the production of diborane and the process for producing diborane. Background Technology

[0002] A light-weight removal tower is a mass transfer device that uses the packing material inside the tower as the contact component between the gas and liquid phases. The tower body is a vertical cylinder with a packing support plate at the bottom. The packing material is placed on the support plate in a random or orderly manner. A packing pressure plate is installed above the packing material to prevent it from being blown away by the rising gas flow. Liquid is sprayed onto the packing material from the top of the tower through a liquid distributor and flows down along the surface of the packing material. Gas is introduced from the bottom of the tower and distributed by a gas distribution device (small-diameter towers generally do not have a gas distribution device). After distribution, gas flows countercurrently with liquid through the voids of the packing layer. On the surface of the packing material, the gas and liquid phases are in close contact for mass transfer.

[0003] In the production of high-purity diborane, the light component removal tower is a key piece of equipment for separating diborane from light component impurities. To ensure the normal operation of core components such as packing and trays within the light component removal tower and to prevent solid particles, dust, reaction byproducts, and polymers from clogging the tower structure, a filter screen is usually installed inside the light component removal tower to filter the diborane mixture entering the tower. However, as production continues, these impurities gradually deposit in the pores of the filter screen. Although the liquid condensed in the condenser flows downward under gravity during the operation of the light component removal tower, generating a certain scouring force on the surface of the filter screen and carrying away some loose impurities, the scouring and dissolving effect of the liquid is insufficient for strongly adhering solid particles, polymers, or stubborn deposits formed due to chemical reactions with the filter screen. Over time, the pores of the filter screen continuously shrink, the flow area decreases, and eventually the filter screen becomes clogged.

[0004] Currently, the existing technology for addressing the clogging problem of the filter screen in the light precipitator generally adopts manual cleaning. This method has many drawbacks: on the one hand, manual cleaning is cumbersome and requires a lot of manpower and time, which is not only inefficient and increases the production cost of enterprises, but also poses a risk of environmental pollution due to the release of separated gas into the atmosphere in the open environment during manual cleaning; on the other hand, the manual cleaning process must be carried out by stopping the machine, which makes it impossible for the light precipitator to produce continuously, seriously reducing the production efficiency of high-purity diborane, increasing production energy consumption, and affecting the economic benefits of enterprises.

[0005] Therefore, proposing an environmentally friendly and energy-saving light-duty removal tower that can both automatically clean the internal filtration device and achieve continuous production has become an urgent problem to be solved in the industry. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the problems existing in the above and / or existing light removal towers for the production of high-purity borane, the present invention is proposed.

[0008] Therefore, the problem to be solved by this invention is how to solve the problem that manual cleaning is cumbersome, requires a lot of manpower and time, and requires machine shutdown during the manual cleaning process, which seriously reduces the production efficiency of high-purity borane.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0010] The first objective of this invention is to provide a light-weight removal tower, comprising a main structure and a self-cleaning component, wherein,

[0011] The main structure includes a tower body, a condenser is disposed at the top of the inner cavity of the tower body, an upper pressure plate is disposed below the condenser, a lower pressure plate is disposed below the upper pressure plate, a redistributor is disposed below the lower pressure plate, a packing support is disposed below the redistributor, a filter plate is disposed below the packing support, and a reboiler is disposed below the filter plate. A feed pipe is connected to the side wall of the tower body; and...

[0012] The self-cleaning component includes a sleeve rotatably connected to the bottom center of a filter plate. Abutment members are respectively provided on both sides of the top of the filter plate. A drive ring is rotatably connected to the bottom of the sleeve. A drive rod is provided at the bottom of the drive ring. A fixing plate is fixedly connected to the bottom of the drive rod. The end of the fixing plate is fixedly connected to the inner cavity of the tower body. A cleaning member is provided on one side of the drive ring. A rotating member is provided below the cleaning member. A collecting member is provided on one side of the cleaning member.

[0013] In a preferred embodiment of the light-removal tower of the present invention, each of the abutting members includes a bent retaining plate fixedly connected to the top of the filter plate. A retaining groove is provided in the inner cavity of the tower body corresponding to the bent retaining plate. Each retaining groove cooperates with a bent retaining plate, such that the bent retaining plate passes through the retaining groove and can slide within the retaining groove. The upper part of the retaining groove is connected to a receiving groove on the side away from the bent retaining plate. A first spring is fixedly connected to the receiving groove on the side away from the bent retaining plate. A slope block is fixedly connected to the first spring on the side close to the bent retaining plate. The slope block cooperates with the bent retaining plate. A floating part is provided below the slope block.

[0014] As a preferred embodiment of the light removal tower of the present invention, the floating part includes two sets of floating semi-rings disposed above the filter plate. The two sets of floating semi-rings are connected by a push rod. Each slot has a floating groove connected to both sides. Each push rod passes through two adjacent floating grooves and a slot located between the two floating grooves, and slides in the corresponding floating groove and slot to realize the cooperation between the floating groove and the push rod.

[0015] In a preferred embodiment of the light-duty removal tower of the present invention, the cleaning component includes a cleaning roller rotatably connected to one side of the drive ring via a bearing, and a support plate is rotatably connected to one side of the cleaning roller via a bearing.

[0016] In a preferred embodiment of the light removal tower described in this invention, the rotating component includes a toothed ring connecting plate rotatably connected to the surface of the drive ring, an oblique toothed ring fixedly connected to the end of the toothed ring connecting plate, the top of the oblique toothed ring being slidably connected to the support plate, a gear fixedly connected to the radial outer end face of the cleaning roller, and the top teeth of the oblique toothed ring meshing with the gear.

[0017] In a preferred embodiment of the light-removal tower of the present invention, a slider is fixedly connected to the outer edge of the oblique toothed ring, and a groove is provided on one side of the inner cavity of the tower body, the groove cooperating with the slider.

[0018] In a preferred embodiment of the light tower described in this invention, the collecting component includes an arc-shaped collecting frame fixedly connected to one side of the drive ring. The top and one side of the arc-shaped collecting frame are open, and a collecting tooth is fixedly connected to the top of one side of the arc-shaped collecting frame.

[0019] As a preferred embodiment of the light-weight removal tower described in this invention, the bottom of the arc-shaped collection frame is provided with a drainage hole, and a bent baffle is fixedly connected to one side of the inner cavity of the arc-shaped collection frame.

[0020] As a preferred embodiment of the light-weight removal tower of the present invention, the outer edge of the filter plate is fixedly connected with a plurality of uniformly distributed limiting blocks, the inner cavity of the tower body is provided with a plurality of longitudinally arranged limiting grooves, the bottom of the inner cavity of each limiting groove is fixedly connected with a second spring, and the top of each second spring is fixedly connected to a set of limiting blocks respectively.

[0021] In a preferred embodiment of the light-removal tower of the present invention, the inner cavity of the drive ring is provided with an arc-shaped guide groove, the surface of the drive rod is provided with an arc-shaped ball track, and the top of the drive rod passes through the drive ring and the sleeve and extends to the top of the filter plate.

[0022] A second objective of this invention is to provide a process for producing high-purity diborane using the aforementioned light-light-removal tower, comprising the following steps:

[0023] S1. Extract a predetermined amount of potassium borohydride from the silo and add it to the reactor. After cooling the reactor to the preset temperature, introduce boron trifluoride into the reactor at a set flow rate to carry out the reaction.

[0024] S2. Slowly increase the temperature of the reactor to vaporize the liquid reactants in the reactor into gas, collect the gas in a cold trap, and collect the generated reaction residue in a residue container.

[0025] S3. Slowly increase the temperature of the cold trap to vaporize the gas and then allow it to enter the light-weight removal tower at a set flow rate.

[0026] S4. Under set pressure and temperature, the light component is extracted from the side stream of the light component removal tower and then enters the heavy component removal tower.

[0027] S5. Under set temperature and pressure, high-purity diborane gas is collected from the top of the deweighting tower; and

[0028] S6. The extracted high-purity diborane gas is then filled.

[0029] The beneficial effects of this invention are as follows: Through the design of the self-cleaning components, the light-duty removal tower can automatically clean the clogged filter plates in a closed environment without manual intervention, effectively solving the problem of filter screen clogging caused by impurity deposition, and has a positive environmental protection effect; In particular, through the synergistic action of components such as cleaning rollers, helical toothed rings, and gears, it can effectively remove stubborn impurities such as solid particles and polymers with strong adhesion on the surface of the filter plates, ensuring the normal filtration function of the filter plates, maintaining the efficient gas-liquid mass transfer in the light-duty removal tower, and avoiding the drawback of traditional manual cleaning requiring machine shutdown, realizing continuous production of the light-duty removal tower, saving production energy consumption, and improving production efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0031] Figure 1 A scene depicting the removal of the light tower.

[0032] Figure 2 This is a partial structural diagram of the self-cleaning component.

[0033] Figure 3 This is a structural diagram of the drive ring and drive rod of the light tower.

[0034] Figure 4This is a partial sectional view of the tower body of the light-duty tower.

[0035] Figure 5 for Figure 4 Enlarged view of region A in the middle.

[0036] Figure 6 Another perspective view of the partial cross-sectional structure of the tower body of the lightweight tower.

[0037] Figure 7 for Figure 6 Enlarged view of region B in the middle.

[0038] Figure 8 This is a partial structural diagram of the inner wall of the tower body for removing light weights.

[0039] Figure 9 The diagram shows the changes in the second stage of the self-cleaning component for the light tower.

[0040] Figure 10 for Figure 9 Enlarged view of region C.

[0041] Figure 11 The diagram shows the changes in the third stage of the self-cleaning component of the light tower.

[0042] Figure 12 for Figure 11 Enlarged view of region D in the middle.

[0043] Figure 13 Cross-sectional view of the arc-shaped collection frame for the light tower.

[0044] Figure 14 This is a schematic diagram of the process flow for producing high-purity diborane using the light-light-removal tower provided by the present invention.

[0045] In the diagram: 1. Main structure; 11. Tower body; 12. Condenser; 13. Upper pressure plate; 14. Lower pressure plate; 15. Redistributor; 16. Packing support; 17. Filter plate; 18. Reboiler; 19. Feed pipe; 2. Self-cleaning component; 21. Sleeve; 22. Abutment part; 23. Drive ring; 24. Drive rod; 25. Fixing plate; 26. Cleaning part; 27. Rotating part; 28. Collecting part; 22-1. Bending clamping plate; 22-2. Slot; 22-3. Receiving groove; 22-4. First spring; 22-5. Slope block; 22-6 1. Floating part; 22-61. Floating semi-ring; 22-62. Push rod; 22-63. Floating groove; 26-1. Cleaning roller; 26-2. Support plate; 27-1. Toothed ring connecting plate; 27-2. Helical toothed ring; 27-3. Gear; 27-4. Slider; 27-5. Slide groove; 28-1. Arc-shaped collection frame; 28-2. Collection tooth; 28-3. Drain hole; 28-4. Bending edge; 17-1. Limiting block; 17-2. Limiting groove; 17-3. Second spring; 23-1. Arc-shaped guide groove; 23-2. Arc-shaped ball track. Detailed Implementation

[0046] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0049] Example 1

[0050] Reference Figures 1 to 13 This is the first embodiment of the present invention. This embodiment provides a light removal tower for the production of high-purity borane, including a main structure 1 and a self-cleaning component 2. The self-cleaning component 2 overcomes the shortcomings of the prior art, such as the cumbersome operation of manually cleaning the filter screen, which requires a lot of manpower and time costs, and the fact that the manual cleaning process must be stopped, which seriously reduces the production efficiency of high-purity borane.

[0051] like Figure 1As shown, the main structure 1 includes a tower body 11, a condenser 12, an upper pressure plate 13, a lower pressure plate 14, a redistributor 15, a packing support 16, a filter plate 17, a reboiler 18, and a feed pipe 19. Specifically, the condenser 12 is installed at the top of the inner cavity of the tower body 11, the upper pressure plate 13 is installed below the condenser 12, the lower pressure plate 14 is installed below the upper pressure plate 13, the redistributor 15 is installed below the lower pressure plate 14, the packing support 16 is installed below the redistributor 15, the filter plate 17 is installed below the packing support 16, and the reboiler 18 is installed below the filter plate 17. The feed pipe 19 is connected to the side wall of the tower body 11.

[0052] like Figures 1-4 As shown, the self-cleaning component 2 includes a sleeve 21, an abutment 22, a drive ring 23, and a drive rod 24. The sleeve 21 is rotatably connected to the bottom center of the filter plate 17. The abutment 22 is connected to both sides of the top of the filter plate 17. The drive ring 23 is rotatably connected to the bottom of the sleeve 21. The drive rod 24 is sleeved on the bottom of the drive ring 23. The bottom of the drive rod 24 is fixedly connected to a fixing plate 25. There are five sets of fixing plates 25. The outer edge of the fixing plate 25 is fixedly connected to the inner cavity of the tower body 11. A cleaning component 26 is provided on one side of the drive ring 23. A rotating component 27 is provided below the cleaning component 26. A collecting component 28 is provided on one side of the cleaning component 26.

[0053] In the main structure 1, the tower body 11 serves as the core carrier. The condenser 12 is located at the top of the inner cavity of the tower body 11, which can condense the condensable components in the rising diborane mixed gas from the top of the tower into liquid. Part of the liquid is refluxed to maintain the gas-liquid balance in the tower, and the other part is discharged as a light component. The upper pressure plate 13 and the lower pressure plate 14 are used to fix the packing, ensuring the stability of the packing layer and providing sufficient and uniform contact surface for gas-liquid mass transfer. The redistributor 15 enables the liquid to be evenly distributed in the packing layer, improving the mass transfer efficiency. The packing support 16 supports the packing. The filter plate 17 intercepts solid particles, dust and other impurities in the mixed gas to prevent them from clogging the packing and the internal structure of the tower. The reboiler 18 heats the liquid at the bottom of the tower to generate rising steam, providing the necessary energy and gas phase power for the distillation process. The feed pipe 19 is the channel for the borane mixed gas to enter the tower body 11. The self-cleaning component 2, through the cooperation of components such as the sleeve 21 and the drive ring 23, realizes the automatic cleaning of the filter plate 17, which solves the problem of traditional manual cleaning, ensures the continuous and stable operation of the light gas removal tower and improves production efficiency.

[0054] Example 2

[0055] Reference Figures 1 to 13 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0056] Specifically, each abutment 22 includes a bent retaining plate 22-1 fixedly connected to the top of the filter plate 17. A slot 22-2 is provided in the inner cavity of the tower body 11 corresponding to the bent retaining plate 22-1, meaning the inner cavity of the tower body 11 has two slots 22-2. Each slot 22-2 engages with a bent retaining plate 22-1. The bent retaining plate 22-1 passes through the slot 22-2 and can slide within it. The top of the bent retaining plate 22-1 has a bent portion facing the slot 22-2, and the bottom of the bent retaining plate 22-1 is flush with the filter plate 17. 7. Fixed connection: The upper part of the slot 22-2 is connected to the receiving groove 22-3 on the side away from the bending plate 22-1. The height of the receiving groove 22-3 is lower than the top height of the bending plate 22-1 in the non-working state. The receiving groove 22-3 is fixedly connected to the first spring 22-4 on the side away from the bending plate 22-1. The first spring 22-4 is fixedly connected to the slope block 22-5 on the side close to the bending plate 22-1. The slope block 22-5 cooperates with the bending plate 22-1. A floating part 22-6 is provided below the slope block 22-5.

[0057] The bending plate 22-1, in conjunction with the slot 22-2 and the slope block 22-5, plays a crucial role in controlling the change in liquid weight at the top of the filter plate 17. The initial positioning and limiting of the filter plate 17 are achieved through the cooperation of the bending plate 22-1 and the slot 22-2. As liquid gradually accumulates at the top of the filter plate 17 and the weight increases, the bending plate 22-1 slides downward within the slot 22-2. With further increases in liquid weight, the bending plate 22-1 continues to slide downward, contacting and limiting the bending plate 22-1 with the top of the slope block 22-5. In other words, the slope block 22-5 supports the bending plate 22-1, preventing it from moving downwards. The design of the slope block 22-5 allows the liquid level to reach a certain height, releasing its restriction on the bending plate 22-1 and triggering the filter plate 17 to descend further, providing conditions for the deep cleaning of the self-cleaning component 2. At the same time, the first spring 22-4 supports the slope plate 22-5, ensuring its stable restriction on the bending plate 22-1. That is, the first spring 22-4 only exerts a lateral restoring force on the slope plate 22-5. When the slope plate 22-5 supports the bending plate 22-1, the force on the slope plate 22-5 is limited by the receiving groove 22-3, forming longitudinal support, thus ensuring the stability and reliability of the structure's operation.

[0058] Specifically, the floating part 22-6 includes two sets of floating semi-rings 22-61 disposed above the filter plate 17. The two sets of floating semi-rings 22-61 are connected by a push rod 22-62. Each slot 22-2 has floating grooves 22-63 connected to both sides. That is, the floating grooves 22-63 are opened in the inner cavity of the tower body 11 and distributed on both sides of each slot 22-2. The floating grooves 22-63 distributed on both sides of the slot 22-2 are connected to the slot 22-2 located in the middle. Each push rod 22-62 passes through two adjacent floating grooves 22-63 and the slot 22-2 located between the two floating grooves 22-63, and slides in the corresponding floating groove 22-63 and slot 22-2 to realize the cooperation between the floating groove 22-63 and the push rod 22-62.

[0059] The floating part 22-6 works in conjunction with the abutment part 22 through the cooperation of the floating ring 22-61, the push rod 22-62 and the floating groove 22-63. As the liquid at the top of the filter plate 17 gradually increases, the floating ring 22-61 drives the push rod 22-62 to rise in the floating groove 22-63 and the slot 22-2 under the action of liquid buoyancy. When the push rod 22-62 rises to contact the slope surface of the slope block 22-5, it pushes the slope block 22-5 to slide into the receiving groove 22-3, compresses the first spring 22-4, and then releases the slope block 22-5 from the limit of the bending plate 22-1, realizing the different stages of the descent of the filter plate 17, controlling the cleaning degree and range of the self-cleaning component 2, and ensuring that the filter plate 17 can be effectively cleaned under different degrees of clogging.

[0060] Specifically, the cleaning component 26 includes a cleaning roller 26-1 rotatably connected to one side of the drive ring 23 via a bearing, and a support plate 26-2 rotatably connected to one side of the cleaning roller 26-1 via a bearing.

[0061] The cleaning roller 26-1 in the cleaning component 26 is rotatably connected to the drive ring 23 via a bearing. When the drive ring 23 rotates, the cleaning roller 26-1 can roll and clean the surface of the filter plate 17, directly acting on the surface of the filter plate 17 to remove impurities attached to the filter plate 17. The support plate 26-2 provides support and positioning for the cleaning roller 26-1, ensuring the stability and reliability of the cleaning roller 26-1 during the cleaning process, ensuring that the cleaning roller 26-1 can effectively and continuously clean the filter plate 17, and improving the cleaning effect.

[0062] Specifically, the rotating component 27 includes a toothed ring connecting plate 27-1 rotatably connected to the surface of the drive ring 23. A helical toothed ring 27-2 is fixedly connected to the outer end of the toothed ring connecting plate 27-1, i.e. the end away from the drive ring 23. The helical toothed ring 27-2 is coaxial with the filter plate 17. A gear 27-3 is fixedly connected to the radial outer end face of the cleaning roller 26-1. The gear 27-3 meshes with the helical toothed ring 27-2. The helical toothed ring 27-2 is located below the support plate 26-2, and the top of the helical toothed ring 27-2 is slidably connected to the support plate 26-2.

[0063] The rotating component 27 utilizes the meshing transmission between the helical toothed ring 27-2 and the gear 27-3. When the drive ring 23 rotates, it drives the helical toothed ring 27-2 to move through the toothed ring connecting plate 27-1, which in turn causes the gear 27-3 to rotate, thereby realizing the rotation of the cleaning roller 26-1. This allows the cleaning roller 26-1 to rotate itself while rolling and cleaning the filter plate 17, increasing the contact range and cleaning force between the cleaning roller 26-1 and the surface of the filter plate 17, further improving cleaning efficiency and effect. It can more effectively remove impurities with strong adhesion on the filter plate 17. The toothed ring connecting plate 27-1 is used to connect the helical toothed ring 27-2 and the drive ring 23 to ensure the stability and reliability of the transmission.

[0064] Specifically, the inner cavity of the tower body 11 is provided with a sliding groove 27-5, and a sliding block 27-4 is fixedly connected to the helical tooth ring 27-2 at the outer edge corresponding to the sliding groove 27-5. The sliding groove 27-5 and the sliding block 27-4 cooperate, that is, the sliding block 27-4 is placed in the sliding groove 27-5 and can slide in the sliding groove 27-5.

[0065] Therefore, when the helical gear ring 27-2 moves up and down, the slider 27-4 also slides up and down within the groove 27-5, preventing the helical gear ring 27-2 from shifting or wobbling. The cooperation between the slider 27-4 and the groove 27-5 provides guidance and limitation for the helical gear ring 27-2, ensuring that the helical gear ring 27-2 slides smoothly along the predetermined direction during movement, preventing the helical gear ring 27-2 from shifting or wobbling, and ensuring accurate and reliable meshing transmission between the helical gear ring 27-2 and the gear 27-3. This ensures that the cleaning roller 26-1 can rotate stably, maintain a good cleaning effect, and also improves the overall stability and durability of the rotating component 27.

[0066] Specifically, the collecting component 28 includes an arc-shaped collecting frame 28-1 fixedly connected to one side of the drive ring 23. The top and one side of the arc-shaped collecting frame 28-1 are open, and a collecting tooth 28-2 is fixedly connected to the top of one side of the arc-shaped collecting frame 28-1.

[0067] The arc-shaped collection frame 28-1 in the collection component 28 is used to collect the impurities scraped off by the cleaning roller 26-1 during the cleaning process. Its open top and side design facilitates the entry of impurities. The collection teeth 28-2 can cooperate with the cleaning roller 26-1 to scrape off some of the impurities attached to the surface of the cleaning roller 26-1, so that some impurities are successfully collected into the arc-shaped collection frame 28-1, preventing impurities from falling off again or adhering to the filter plate 17, ensuring the cleaning effect of the filter plate 17 after cleaning, and also facilitating the subsequent centralized treatment of impurities.

[0068] Specifically, the bottom of the arc-shaped collection frame 28-1 is provided with a drain hole 28-3, and a bent baffle 28-4 is fixedly connected to one side of the inner cavity of the arc-shaped collection frame 28-1.

[0069] The drain hole 28-3 allows the liquid in the arc-shaped collection frame 28-1 to be discharged in a timely manner. That is, the liquid enters the arc-shaped collection frame 28-1 from top to bottom through the opening and exits the arc-shaped collection frame 28-1 through the drain hole 28-3, which prevents the liquid from accumulating in the arc-shaped collection frame 28-1 and affecting the collection and treatment of impurities. The bent edge 28-4 can prevent some impurities from leaving the arc-shaped collection frame 28-1 due to water flow impact or other external forces, further improving the reliability of impurity collection and facilitating subsequent unified cleaning.

[0070] It should be clarified that in actual operation, due to factors such as the characteristics of impurities and fluid dynamics, the arc-shaped collection frame 28-1 cannot completely collect impurities, and the bent baffle 28-4 also cannot completely prevent impurities from detaching. However, the bent baffle 28-4, through its unique structural design, can effectively reduce the probability of impurities detaching from the collection frame due to external forces such as liquid flushing and airflow disturbance. When the cleaning roller 26-1 continuously cleans the filter plate 17, some impurities that are not captured by the arc-shaped collection frame 28-1 in time will be scraped and pushed again in subsequent cleaning cycles, and finally enter the frame for collection.

[0071] Especially for solid particles and polymers with strong adhesion, or stubborn deposits formed by chemical reactions, there is a strong adsorption and adhesion between them and the impurities. In this case, the bending baffle 28-4 can further limit the movement space of such stubborn impurities by setting a specific bending angle and blocking structure, reducing the possibility of them leaving the collection frame, thereby significantly improving the overall efficiency and reliability of impurity collection and ensuring the continuous and stable operation of the light removal tower self-cleaning system.

[0072] Specifically, multiple sets of limiting blocks 17-1 are fixedly connected to the outer edge of the filter plate 17. The multiple sets of limiting blocks 17-1 are evenly distributed. Multiple sets of longitudinally arranged limiting grooves 17-2 are opened in the inner cavity of the tower body 11. A second spring 17-3 is fixedly connected to the bottom of the inner cavity of each limiting groove 17-2. The top of each second spring 17-3 is fixedly connected to a set of limiting blocks 17-1, so that the filter plate 17 is inserted into the multiple sets of limiting grooves 17-2 through the limiting blocks 17-1.

[0073] The cooperation of the limiting block 17-1, the limiting groove 17-2, and the second spring 17-3 limits and buffers the descent and ascent of the filter plate 17. During the descent of the filter plate 17, the limiting block 17-1 slides within the limiting groove 17-2, restricting the descent position of the filter plate 17 and preventing excessive descent that could damage other components. The second spring 17-3 is compressed during the descent of the filter plate 17, storing elastic potential energy. When the weight of the liquid on the filter plate 17 decreases, the second spring 17-3 releases the elastic potential energy, causing the filter plate 17 to reset. At the same time, it acts as a buffer during the reset process, ensuring a smooth reset of the filter plate 17 and maintaining the normal operation and structural stability of the self-cleaning assembly 2.

[0074] Specifically, the inner cavity of the drive ring 23 is provided with an arc-shaped guide groove 23-1, the surface of the drive rod 24 is provided with an arc-shaped ball track 23-2, and the top of the drive rod 24 passes through the drive ring 23 and the sleeve 21 and extends to the top of the filter plate 17.

[0075] The arc-shaped guide groove 23-1 in the inner cavity of the drive ring 23 cooperates with the arc-shaped ball track 23-2 on the surface of the drive rod 24. When the drive ring 23 slides along the drive rod 24, it can rotate to provide power for the self-cleaning assembly 2. This structural design allows the sliding and rotating actions of the drive ring 23 to be converted and coordinated, ensuring that the cleaning roller 26-1 effectively cleans the surface of the filter plate 17. It also improves the transmission efficiency and stability of the drive structure, ensuring that the self-cleaning assembly 2 can operate reliably and achieve continuous automatic cleaning of the filter plate 17.

[0076] Therefore, in the production process of high-purity borane, the borane mixed gas enters the tower body 11 through the feed pipe 19 in the light-light removal tower of the present invention. First, it is filtered for impurities by the filter plate 17. As production continues, the filter plate 17 gradually becomes clogged, causing the liquid condensed by the condenser 12 to accumulate at the top of the filter plate 17.

[0077] In the first stage, liquid continuously accumulates on the filter plate 17, increasing its weight. The filter plate 17 drives the bending clamp 22-1 to slide downwards within the clamping groove 22-2. At this time, the drive ring 23 slides on the surface of the drive rod 24. Due to the interaction between the arc-shaped guide groove 23-1 and the arc-shaped ball track 23-2, the drive ring 23 rotates, thereby driving the cleaning roller 26-1 to clean the surface of the filter plate 17. Simultaneously, the helical tooth ring 27-2 meshes with the gear 27-3, causing the cleaning roller 26-1 to rotate, enhancing the cleaning effect. In this stage, the downward stroke of the filter plate 17 is relatively short, and the cleaning roller 26-1 rotates half a circle around the drive ring 23 on the surface of the filter plate 17, initially cleaning the impurities on the surface of the filter plate 17.

[0078] Second stage: If the blockage is not completely resolved after the first stage of cleaning, the bending plate 22-1 continues to descend until it contacts the slope block 22-5. At this time, the liquid at the top of the filter plate 17 continues to increase, and the floating ring 22-61 drives the push rod 22-62 to rise continuously in the floating groove 22-63 under the action of liquid buoyancy.

[0079] Third stage: When the push rod 22-62 rises to contact the slope surface of the slope block 22-5, it pushes the slope block 22-5 to slide into the receiving groove 22-3, compressing the first spring 22-4. Then, the slope block 22-5 releases the limit of the folding plate 22-1, and a large amount of liquid drives the filter plate 17 to move downward rapidly. The drive ring 23 slides on the surface of the drive rod 24 again and rotates under the action of the arc guide groove 23-1 and the arc ball track 23-2, driving the cleaning roller 26-1 to perform a deeper cleaning. At the same time, the cleaning roller 26-1 rotates again through the cooperation of the helical tooth ring 27-2 and the gear 27-3. In this stage, the cleaning roller 26-1 can rotate around the surface of the filter plate 17 with the drive ring 23 as the center, and perform a comprehensive cleaning of the filter plate 17.

[0080] After the filter plate 17 descends to its lowest point, the liquid is discharged through the filter plate 17. During the descent of the filter plate 17, the limiting block 17-1 slides in the limiting groove 17-2 and compresses the second spring 17-3. When the weight of the liquid on the filter plate 17 is insufficient to fully compress the second spring 17-3, the second spring 17-3 drives the limiting block 17-1 and the filter plate 17 to reset. During the reset process, the cleaning roller 26-1 rotates in the opposite direction on the filter plate 17 to clean the surface of the filter plate 17 again. During the rotation of the cleaning roller 26-1, the collecting teeth 28-2 scrape off the impurities on the surface of the cleaning roller 26-1. Some impurities enter the arc-shaped collecting frame 28-1 for collection. The drain hole 28-3 discharges the liquid in the arc-shaped collecting frame 28-1. The bent edge 28-4 prevents impurities from falling off, thereby realizing the automatic cleaning of the filter plate 17 and ensuring the normal operation of the light-duty removal tower.

[0081] Example 3

[0082] Reference Figure 7 and Figure 12 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0083] Specifically, the push rod 22-62 has a ball bearing structure on the side near the slope block 22-5.

[0084] When the liquid level in the light-duty removal tower drops, the floating ring 22-61 drives the push rod 22-62 to fall back. The ball bearings replace the traditional sliding friction with rolling friction, which greatly reduces the contact resistance between the push rod 22-62 and the slope block 22-5. This low-friction operation mechanism can effectively avoid the risk of component jamming caused by excessive frictional resistance, ensure that the push rod 22-62 can achieve smooth lifting and lowering during liquid level changes, and ensure that the coordination between the contact part 22 and the floating part 22-6 is not hindered. This maintains the stable operation of the self-cleaning component 2 of the light-duty removal tower and avoids the impact of mechanical jamming on the cleaning efficiency and reliability of the filter plate 17.

[0085] Example 4

[0086] like Figure 14 The diagram shows a process flow chart for producing high-purity diborane using the aforementioned light-light removal tower. In this embodiment, firstly, 40 kg of potassium borohydride raw material is extracted from the silo and added to a 150 L reactor. The reactor is cooled to a preset temperature, and boron trifluoride raw material is introduced at a flow rate of 2 kg / h to 2.2 kg / h to initiate the reaction, initially generating diborane gas. The chemical reaction equation is as follows:

[0087] 3KBH4 + 4BF3 = 3KBF4 + 2B2H6

[0088] Next, after the boron trifluoride feedstock is introduced, the temperature of the reactor is slowly raised to -92°C, causing the liquid reactants in the reactor to vaporize into gas and be collected in a cold trap. The reaction residue generated during the reaction is collected in a residue container.

[0089] Then, the temperature of the cold trap is slowly increased to vaporize the diborane gas, which then enters the light-weight gas removal tower at a set flow rate of 0.4 kg / h to 0.5 kg / h. Controlling the gas flow rate into the light-weight gas removal tower is crucial to prevent both insufficient processing capacity due to low flow rates and overloading of the distillation tower due to excessive flow rates, resulting in substandard product quality.

[0090] Under set pressure and temperature, light components such as nitrogen and oxygen are drawn from the top of the light component removal tower and sent to the waste treatment system, while the light component is drawn from the side stream of the light component removal tower and sent to the heavy component removal tower.

[0091] Subsequently, under set temperature and pressure, the heavy components are collected from the bottom of the deweighting tower and sent to the waste system, while high-purity diborane gas is collected from the top of the deweighting tower. Finally, the high-purity diborane gas is filled through the filling system.

[0092] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A light ends removal column apparatus, characterized by: It includes the main structure (1) and the self-cleaning component (2), wherein, The main structure (1) includes a tower body (11), a condenser (12) is provided at the top of the inner cavity of the tower body (11), an upper pressure plate (13) is provided below the condenser (12), a lower pressure plate (14) is provided below the upper pressure plate (13), a redistributor (15) is provided below the lower pressure plate (14), a packing support (16) is provided below the redistributor (15), a filter plate (17) is provided below the packing support (16), a reboiler (18) is provided below the filter plate (17), and a feed pipe (19) is connected to the side wall of the tower body (11). The self-cleaning component (2) includes a sleeve (21), which is rotatably connected to the bottom center of the filter plate (17). Abutment members (22) are respectively connected to the top two sides of the filter plate (17). A drive ring (23) is rotatably connected to the bottom of the sleeve (21). A drive rod (24) is sleeved on the bottom of the drive ring (23). A fixing plate (25) is fixedly connected to the bottom of the drive rod (24). The outer edge of the fixing plate (25) is fixedly connected to the inner cavity of the tower body (11). A cleaning member (26) is provided on one side of the drive ring (23). A rotating member (27) is provided below the cleaning member (26). A collecting member (28) is provided on one side of the cleaning member (26). Each of the abutting members (22) includes a bent retaining plate (22-1) fixedly connected to the top of the filter plate (17). A slot (22-2) is provided in the inner cavity of the tower body (11) corresponding to the bent retaining plate (22-1). Each slot (22-2) cooperates with one of the bent retaining plates (22-1), so that the bent retaining plate (22-1) passes through the slot (22-2) and can slide within the slot (22-2). The upper part of the slot (22-2) is away from the... A receiving groove (22-3) is connected to one side of the bending plate (22-1). A first spring (22-4) is fixedly connected to the receiving groove (22-3) on the side away from the bending plate (22-1). A slope block (22-5) is fixedly connected to the first spring (22-4) on the side close to the bending plate (22-1). The slope block (22-5) cooperates with the bending plate (22-1). A floating part (22-6) is provided below the slope block (22-5). The floating part (22-6) includes two sets of floating semi-rings (22-61) disposed above the filter plate (17). The two sets of floating semi-rings (22-61) are connected by a push rod (22-62). Each slot (22-2) has a floating groove (22-63) connected to both sides. Each push rod (22-62) passes through two adjacent floating grooves (22-63) and the slot (22-2) located between the two floating grooves (22-63), and slides in the corresponding floating groove (22-63) and slot (22-2) to realize the cooperation between the floating groove (22-63) and the push rod (22-62).

2. The light-weight tower removal device as described in claim 1, characterized in that: The cleaning component (26) includes a cleaning roller (26-1) rotatably connected to one side of the drive ring (23) via a bearing, and a support plate (26-2) is rotatably connected to one side of the cleaning roller (26-1) via a bearing.

3. The light-weight tower removal device as described in claim 2, characterized in that: The rotating component (27) includes a toothed ring connecting plate (27-1) rotatably connected to the surface of the drive ring (23). A helical toothed ring (27-2) is fixedly connected to the outer end of the toothed ring connecting plate (27-1). The top of the helical toothed ring (27-2) is slidably connected to the support plate (26-2). A gear (27-3) is fixedly connected to the radial outer end face of the cleaning roller (26-1). The top teeth of the helical toothed ring (27-2) mesh with the gear (27-3).

4. The light-weight tower removal device as described in claim 3, characterized in that: The outer edge of the helical toothed ring (27-2) is fixedly connected to a slider (27-4), and the inner cavity of the tower body (11) is provided with a sliding groove (27-5), which cooperates with the slider (27-4).

5. The light-weight tower removal device as described in claim 1, characterized in that: The collecting component (28) includes an arc-shaped collecting frame (28-1) fixedly connected to one side of the drive ring (23). The top and one side of the arc-shaped collecting frame (28-1) are open, and a collecting tooth (28-2) is fixedly connected to the top of one side of the arc-shaped collecting frame (28-1).

6. The light-weight tower removal device as described in claim 5, characterized in that: The outer edge of the filter plate (17) is fixedly connected to a number of uniformly distributed limiting blocks (17-1), and the inner cavity of the tower body (11) is provided with a number of longitudinally arranged limiting grooves (17-2). The bottom of the inner cavity of each limiting groove (17-2) is fixedly connected to a second spring (17-3), and the top of each second spring (17-3) is fixedly connected to a set of limiting blocks (17-1).

7. The light-weight tower removal device as described in claim 6, characterized in that: The inner cavity of the drive ring (23) is provided with an arc-shaped guide groove (23-1), and the surface of the drive rod (24) is provided with an arc-shaped ball track (23-2). The top of the drive rod (24) passes through the drive ring (23) and the sleeve (21) and extends to the top of the filter plate (17).

8. A process for producing high-purity diborane, employing the light-light-removal tower apparatus as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Extract a predetermined amount of potassium borohydride from the silo and add it to the reactor. After cooling the reactor to the preset temperature, introduce boron trifluoride into the reactor at a set flow rate to carry out the reaction. S2. Slowly increase the temperature of the reactor to vaporize the liquid reactants in the reactor into gas, collect the gas in a cold trap, and collect the generated reaction residue in a residue container. S3. Slowly increase the temperature of the cold trap to vaporize the gas and then allow it to enter the light-weight removal tower device at a set flow rate. S4. Under set pressure and temperature, the light component is extracted from the side line of the light component removal tower and then enters the heavy component removal tower. S5. Under set temperature and pressure, high-purity diborane gas is extracted from the top of the deweighting tower; and S6. The extracted high-purity diborane gas is then filled.

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