Environment-friendly energy-saving light component removal tower and process for producing diborane by using same

Abstract

The invention discloses a light component removal tower for producing high-purity diborane, and relates to the technical field of light component removal towers, the light component removal tower comprises a main body structure, the main body structure comprises a tower body, a condenser is arranged at the top of an inner cavity of the tower body, an upper pressing plate is arranged at the bottom of the condenser, a lower pressing plate is arranged at the bottom of the upper pressing plate, and a redistributor is arranged at the bottom of the lower pressing plate; through the design of the self-cleaning assembly, the blocked filter plate can be automatically cleaned, manual intervention is not needed, the problem that a filter screen is blocked due to impurity deposition is effectively solved, stubborn impurities such as solid particles and polymers with high adhesive force on the surface of the filter plate can be effectively removed through the synergistic effect of a cleaning roller, a helical gear ring and a gear, and the service life of the filter plate is prolonged. The normal filtering function of the filtering plate is guaranteed, efficient gas-liquid mass transfer in the light component removal tower is maintained, meanwhile, the defect that shutdown is needed in traditional manual cleaning is overcome, and continuous production of the light component removal tower is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light removal tower, in particular to an environment-friendly and energy-saving light removal tower, more particularly to an environment-friendly and energy-saving light removal tower suitable for producing diborane and a process for producing diborane. BACKGROUND

[0002] The light removal tower is a mass transfer equipment with packing as the gas-liquid contact component. The tower body of the light removal tower is a vertical cylinder, and the bottom is provided with a packing support plate. The packing is placed on the support plate in a random or regular manner. A packing pressing plate is installed above the packing to prevent the packing from being blown by the rising gas flow. Liquid is sprayed onto the packing from the liquid distributor at the top of the tower and flows down along the surface of the packing. The gas is sent from the bottom of the tower and is distributed by the gas distribution device (small-diameter towers generally do not have a gas distribution device). The gas and liquid pass through the interstices of the packing layer in countercurrent, and the gas and liquid are in close contact on the surface of the packing for mass transfer.

[0003] In the production process of high-purity diborane, the light removal tower is a key equipment for separating diborane from light component impurities. In order to ensure the normal operation of the core components such as packing and tray in the light removal tower and prevent solid particles, dust, reaction by-products and polymers and other impurities from blocking the internal structure of the tower, a filter screen is usually installed in the light removal tower to filter the diborane mixed gas entering the tower body. However, as the production continues, the above-mentioned impurities will gradually deposit in the pores of the filter screen. Although the liquid condensed by the condenser flows downward under the action of gravity when the light removal tower is running, it can produce a certain scouring force on the surface of the filter screen to remove some loose impurities, but for solid particles with strong adhesion, polymers or stubborn adhesives formed by chemical reaction with the filter screen, the scouring and dissolving effect of the liquid is difficult to achieve ideal cleaning effect. Over a long period of time, the filter screen pores become smaller and smaller, the flow area continues to decrease, and eventually the filter screen is blocked.

[0004] At present, the existing technology generally uses manual cleaning method to solve the problem of filter screen blockage in the light removal tower. This method has many drawbacks. On the one hand, the manual cleaning operation is tedious and requires a lot of manpower and time cost, which not only reduces the efficiency and increases the production cost of the enterprise, but also causes environmental pollution when the separation gas is released into the atmosphere in the open environment of manual cleaning. On the other hand, the manual cleaning process must be carried out during shutdown, which leads to the discontinuous production of the light removal tower, seriously reduces the production efficiency of high-purity diborane, increases the production energy consumption, and affects the economic benefits of the enterprise.

[0005] Therefore, it is an urgent problem in the industry to provide an environment-friendly and energy-saving light removal tower which can automatically clean the filter device internally and realize continuous production. SUMMARY

[0006] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification in order to avoid obscuring the purpose of this section, the abstract and the title of the specification, and such simplifications or omissions are not to be construed as limiting the scope of the present application.

[0007] In view of the above and / or existing problems in the light removal column for producing high-purity diborane, the present application is proposed.

[0008] Therefore, the problem to be solved by the present application is how to solve the problems of complicated manual cleaning operation, large amount of manpower and time cost, and the necessity of stopping the machine during the manual cleaning process, which seriously reduces the production efficiency of high-purity diborane.

[0009] To solve the above technical problems, the present application provides the following technical solutions:

[0010] The first object of the present application is to provide a light removal column, which comprises a main body structure and a self-cleaning assembly, wherein,

[0011] The main body structure comprises a tower body, a condenser is arranged at the top of the inner cavity of the tower body, an upper pressing plate is arranged below the condenser, a lower pressing plate is arranged below the upper pressing plate, a redistributor is arranged below the lower pressing plate, a packing support is arranged below the redistributor, a filter plate is arranged below the packing support, a reboiler is arranged below the filter plate, and a feed pipe is communicated with the side wall of the tower body; and

[0012] The self-cleaning assembly comprises a sleeve, the sleeve is rotationally connected to the bottom center of the filter plate, abutting pieces are arranged on both sides of the top of the filter plate, a driving ring is rotationally connected to the bottom of the sleeve, a driving rod is arranged at the bottom of the driving ring, a fixed plate is fixedly connected to the bottom of the driving rod, the end of the fixed plate is fixedly connected with the inner cavity of the tower body, a cleaning piece is arranged on one side of the driving ring, a rotating piece is arranged below the cleaning piece, and a collecting piece is arranged on one side of the cleaning piece.

[0013] As a preferred scheme of the light removal column of the present application, each abutting piece comprises a bent clamping plate fixedly connected to the top of the filter plate, the inner cavity of the tower body corresponding to the bent clamping plate is provided with a clamping groove, each clamping groove is matched with one bent clamping plate, so that the bent clamping plate penetrates through the clamping groove and can slide in the clamping groove, a containing groove is communicated with the upper part of the clamping groove on the side away from the bent clamping plate, a first spring is fixedly connected to the containing groove on the side away from the bent clamping plate, a slope block is fixedly connected to the first spring on the side close to the bent clamping plate, the slope block is matched with the bent clamping plate, and a floating part is arranged below the slope block.

[0014] As a preferred scheme of the light removal tower, the floating part comprises two groups of floating half-rings arranged above the filter plate, the two groups of floating half-rings are connected through a pushing rod, each of the two sides of the clamping groove is communicated with a floating groove, each of the pushing rods penetrates through two adjacent floating grooves and the clamping groove between the two floating grooves, and is slid in the corresponding floating groove and the clamping groove, so as to realize the cooperation of the floating groove and the pushing rod.

[0015] As a preferred scheme of the light removal tower, the cleaning part comprises a cleaning roller rotatably connected to one side of the driving ring through a bearing, and a supporting plate rotatably connected to one side of the cleaning roller through a bearing.

[0016] As a preferred scheme of the light removal tower, the rotating part comprises a gear ring connecting plate rotatably connected to the surface of the driving ring, an inclined gear ring fixedly connected to the end of the gear ring connecting plate, a supporting plate slidably connected to the top of the inclined gear ring, a gear fixedly connected to the radial outer end surface of the cleaning roller, and the top teeth of the inclined gear ring are engaged with the gear.

[0017] As a preferred scheme of the light removal tower, the outer edge of the inclined gear ring is fixedly connected with a sliding block, and a sliding groove is arranged on one side of the inner cavity of the tower body and matched with the sliding block.

[0018] As a preferred scheme of the light removal tower, the collecting part comprises an arc-shaped collecting frame fixedly connected to one side of the driving ring, and 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 scheme of the light removal tower, a drain hole is arranged at the bottom of the arc-shaped collecting frame, and a bent retaining edge is fixedly connected to one side of the inner cavity of the arc-shaped collecting frame.

[0020] As a preferred scheme of the light removal tower, a plurality of limiting blocks are fixedly connected to the outer edge of the filter plate, a plurality of limiting grooves are arranged in the inner cavity of the tower body in a longitudinal direction, a second spring is fixedly connected to the bottom of the inner cavity of each of the limiting grooves, and the top of each of the second springs is fixedly connected with a group of limiting blocks.

[0021] As a preferred scheme of the light removal tower, an arc-shaped guide groove is arranged in the inner cavity of the driving ring, an arc-shaped ball rail is arranged on the surface of the driving rod, and the top of the driving rod penetrates through the driving ring and the sleeve and extends to the top of the filter plate.

[0022] The second object of the present application is to provide a process for producing high-purity diborane by using the light removal tower.

[0023] S1, extracting a predetermined amount of potassium borohydride from the silo into the reaction kettle, cooling the reaction kettle to a preset temperature, and then introducing boron trifluoride into the reaction kettle at a set flow rate to react;

[0024] S2, slowly increasing the temperature of the reaction kettle, vaporizing the liquid reactant in the reaction kettle into gas, collecting the gas in the collection cold trap, and collecting the generated reaction residue in the residue tank;

[0025] S3, slowly increasing the temperature of the collection cold trap, so that the gas therein is gasified and enters the light component removal tower at a set flow rate;

[0026] S4, under the set pressure and temperature, the light component is removed from the side line of the light component removal tower and then enters the heavy component removal tower;

[0027] S5, under the set temperature and pressure, high-purity diborane gas is collected from the top of the heavy component removal tower; and

[0028] S6, the collected high-purity diborane gas is filled.

[0029] The beneficial effects of the present application are: through the design of the self-cleaning assembly, the light component removal tower can automatically clean the blocked filter plate in a closed environment without manual intervention, effectively solving the problem of blockage of the filter screen caused by impurity deposition, having a positive environmental protection effect; through the synergistic effect of the cleaning roller, the bevel gear ring, the gear and other components, the solid particles, polymers and other stubborn impurities with strong adhesion on the surface of the filter plate can be effectively removed, the normal filtering function of the filter plate is ensured, the efficient gas-liquid mass transfer in the light component removal tower is maintained, and the disadvantages of traditional manual cleaning requiring shutdown are avoided, realizing continuous production of the light component removal tower, saving production energy consumption, and improving production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0031] Figure 1 It is a scene diagram of the light component removal tower.

[0032] Figure 2 It is a partial structure diagram of the self-cleaning assembly.

[0033] Figure 3 It is a split structure diagram of the driving ring and the driving rod of the light component removal tower.

[0034] Figure 4It is a partial sectional structure view of the tower body of the light removal tower.

[0035] Figure 5 It is a partial sectional structure view of the tower body of the light removal tower. Figure 4 It is an enlarged view of the middle A area.

[0036] Figure 6 It is another view of the partial sectional structure of the tower body of the light removal tower.

[0037] Figure 7 It is a partial sectional structure view of the tower body of the light removal tower. Figure 6 It is an enlarged view of the middle B area.

[0038] Figure 8 It is a partial sectional structure view of the tower body of the light removal tower.

[0039] Figure 9 It is a second stage variation view of the self-cleaning assembly of the light removal tower.

[0040] Figure 10 It is a partial sectional structure view of the tower body of the light removal tower. Figure 9 It is an enlarged view of the middle C area.

[0041] Figure 11 It is a third stage variation view of the self-cleaning assembly of the light removal tower.

[0042] Figure 12 It is a partial sectional structure view of the tower body of the light removal tower. Figure 11 It is an enlarged view of the middle D area.

[0043] Figure 13 It is a sectional structure view of the arc-shaped collection frame of the light removal tower.

[0044] Figure 14 It is a process flow schematic view of the production of high-purity diborane by the light removal tower provided by the application.

[0045] In the figure: 1, main structure; 11, tower body; 12, condenser; 13, upper pressing plate; 14, lower pressing plate; 15, redistributor; 16, packing support; 17, filter plate; 18, reboiler; 19, feed pipe; 2, self-cleaning assembly; 21, sleeve; 22, abutment; 23, drive ring; 24, drive rod; 25, fixed plate; 26, cleaning piece; 27, rotating piece; 28, collecting piece; 22-1, bent clamping plate; 22-2, clamping groove; 22-3, containing groove; 22-4, first spring; 22-5, slope block; 22-6, floating part; 22-61, floating half ring; 22-62, push rod; 22-63, floating groove; 26-1, cleaning roller; 26-2, support plate; 27-1, gear ring connecting plate; 27-2, bevel gear ring; 27-3, gear; 27-4, sliding block; 27-5, sliding groove; 28-1, arc-shaped collecting frame; 28-2, collecting teeth; 28-3, drainage hole; 28-4, bent baffle; 17-1, limiting block; 17-2, limiting groove; 17-3, second spring; 23-1, arc-shaped guide groove; 23-2, arc-shaped ball rail. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0047] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0048] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0049] Embodiment 1

[0050] Reference Figures 1 to 13 For the first embodiment of the present application, the embodiment provides a light removal tower for high-purity diborane production, which comprises a main structure 1 and a self-cleaning assembly 2. Through the self-cleaning assembly 2, the defects of the prior art that manual cleaning of the filter screen is complicated, requires a large amount of manpower and time cost, and must be stopped during the manual cleaning process, which seriously reduces the production efficiency of high-purity diborane are overcome.

[0051] As Figure 1As shown, the main structure 1 includes a tower body 11, a condenser 12, an upper pressing plate 13, a lower pressing plate 14, a redistribution device 15, a packing support 16, a filter plate 17, a reboiler 18, and a feed pipe 19. Specifically, the condenser 12 is arranged at the top of the inner cavity of the tower body 11, the upper pressing plate 13 is arranged below the condenser 12, the lower pressing plate 14 is arranged below the upper pressing plate 13, the redistribution device 15 is arranged below the lower pressing plate 14, the packing support 16 is arranged below the redistribution device 15, the filter plate 17 is arranged below the packing support 16, the reboiler 18 is arranged below the filter plate 17, and the feed pipe 19 is in communication with the sidewall of the tower body 11.

[0052] As shown in the figure, Figures 1 to 4 The self-cleaning assembly 2 includes a sleeve 21, an abutting piece 22, a driving ring 23, and a driving rod 24. The sleeve 21 is rotationally connected to the bottom center of the filter plate 17, the two sides of the top of the filter plate 17 are respectively connected with the abutting pieces 22, the bottom of the sleeve 21 is rotationally connected with the driving ring 23, the bottom of the driving ring 23 is sleeved with the driving rod 24, the bottom of the driving rod 24 is fixedly connected with a fixed plate 25, the number of the fixed plate 25 is five, the outer edge of the fixed plate 25 is fixedly connected with the inner cavity of the tower body 11, one side of the driving ring 23 is provided with a cleaning piece 26, the lower side of the cleaning piece 26 is provided with a rotating piece 27, and one side of the cleaning piece 26 is provided with a collecting piece 28.

[0053] In the main structure 1, the tower body 11 serves as a core carrier, the condenser 12 is arranged at the top of the inner cavity of the tower body 11, and can condense the condensable components in the ethylborane mixed gas rising at the top of the tower into liquid, part of which is returned to maintain the gas-liquid balance in the tower, and the other part is discharged as light components; the upper pressing plate 13 and the lower pressing plate 14 are used to fix the packing, ensure the stability of the packing layer, and provide sufficient and uniform contact surfaces for gas-liquid mass transfer; the redistribution device 15 can uniformly distribute the liquid in the packing layer and improve the mass transfer efficiency; the packing support 16 supports the packing layer, the filter plate 17 intercepts solid particles, dust and other impurities in the mixed gas to prevent them from blocking the packing and the structure in the tower; the reboiler 18 heats the liquid at the bottom of the tower to generate rising steam, which provides the necessary energy and gas phase power for the rectification process, and the feed pipe 19 is a channel for the ethylborane mixed gas to enter the tower body 11. The self-cleaning assembly 2 realizes automatic cleaning of the filter plate 17 through cooperation of the sleeve 21, the driving ring 23 and other components, solves the problem of traditional manual cleaning, ensures the continuous and stable operation of the light removal tower, and improves the production efficiency.

[0054] Example 2

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

[0056] Specifically, each abutting piece 22 comprises a bent clamping plate 22-1 fixedly connected to the top of the filter plate 17, and the inner cavity of the tower body 11 at the position corresponding to the bent clamping plate 22-1 is provided with a clamping groove 22-2, that is, the inner cavity of the tower body 11 is provided with two clamping grooves 22-2, each of which is matched with one bent clamping plate 22-1, the bent clamping plate 22-1 penetrates through the clamping groove 22-2 and can slide in the clamping groove 22-2, the top of the bent clamping plate 22-1 is provided with a bent portion facing the clamping groove 22-2, the bottom of the bent clamping plate 22-1 is fixedly connected with the filter plate 17, the upper part of the clamping groove 22-2 is communicated with a containing groove 22-3 on the side away from the bent clamping plate 22-1, the height of the containing groove 22-3 is lower than the height of the top of the bent clamping plate 22-1 in the non-working state, the containing groove 22-3 is fixedly connected with a first spring 22-4 on the side away from the bent clamping plate 22-1, the first spring 22-4 is fixedly connected with a slope block 22-5 on the side close to the bent clamping plate 22-1, the slope block 22-5 is matched with the bent clamping plate 22-1, and a floating part 22-6 is arranged below the slope block 22-5.

[0057] Through the cooperation of the bent clamping plate 22-1, the clamping groove 22-2, the slope block 22-5 and other components, the bent clamping plate 22-1 and the clamping groove 22-2 play a key role when the liquid weight on the top of the filter plate 17 changes, the cooperation of the bent clamping plate 22-1 and the clamping groove 22-2 realizes the initial limiting and positioning of the filter plate 17, when the liquid on the top of the filter plate 17 gradually accumulates and the weight increases, the bent clamping plate 22-1 slides downward in the clamping groove 22-2, as the liquid weight further increases, the bent clamping plate 22-1 continues to slide downward, the bent clamping plate 22-1 contacts and limits the top of the slope block 22-5, that is, the bent clamping plate 22-1 is supported by the slope block 22-5 to stop moving downward, and the design of the slope block 22-5 enables the liquid level to be released from limiting the bent clamping plate 22-1 to a certain extent, thereby triggering the further downward action of the filter plate 17 and providing conditions for deep cleaning of the self-cleaning assembly 2, at the same time, the first spring 22-4 can support the slope block 22-5 to stably limit the bent clamping plate 22-1, that is, the first spring 22-4 only forms a horizontal restoring force on the slope block 22-5, wherein when the slope block 22-5 supports the bent clamping plate 22-1, the slope block 22-5 is limited by the containing groove 22-3 to form a vertical support, thereby ensuring the stability and reliability of the structure in operation.

[0058] Specifically, the floating part 22-6 includes two groups of floating half-rings 22-61 arranged above the filter plate 17, and the two groups of floating half-rings 22-61 are connected through a push rod 22-62. Each of the two sides of the clamping groove 22-2 is communicated with a floating groove 22-63, i.e., the floating groove 22-63 is arranged in the inner cavity of the tower body 11 and is distributed on the two sides of each clamping groove 22-2. The floating grooves 22-63 distributed on the two sides of the clamping groove 22-2 are communicated with the clamping groove 22-2 located in the middle. Each push rod 22-62 penetrates through the adjacent two floating grooves 22-63 and the clamping groove 22-2 located between the two floating grooves 22-63, and slides in the corresponding floating groove 22-63 and clamping groove 22-2, so as to realize the cooperation of the floating groove 22-63 and the push rod 22-62.

[0059] The floating part 22-6 cooperates with the abutting piece 22 through the cooperation of the floating ring 22-61, the push rod 22-62 and the floating groove 22-63. During the process that the liquid gradually increases on the top of the filter plate 17, the floating ring 22-61 drives the push rod 22-62 to rise in the floating groove 22-63 and the clamping groove 22-2 under the action of the liquid buoyancy. When the push rod 22-62 rises to contact the slope surface of the slope block 22-5, the slope block 22-5 slides into the containing groove 22-3, compresses the first spring 22-4, and then releases the limiting of the bent clamping plate 22-1 by the slope block 22-5, so as to realize the descent of the filter plate 17 at different stages, control the cleaning degree and range of the self-cleaning assembly 2, and ensure that the filter plate 17 can be effectively cleaned under different blockage degrees.

[0060] Specifically, the cleaning part 26 includes a cleaning roller 26-1 rotatably connected to one side of the driving ring 23 through a bearing, and the cleaning roller 26-1 is rotatably connected to a support plate 26-2 on one side through a bearing.

[0061] The cleaning roller 26-1 in the cleaning part 26 is rotatably connected to the driving ring 23 through a bearing. When the driving ring 23 rotates, the cleaning roller 26-1 can roll and clean on 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, ensures the stability and reliability of the cleaning roller 26-1 during the cleaning process, and ensures that the cleaning roller 26-1 can effectively and continuously clean the filter plate 17, thereby improving the cleaning effect.

[0062] Specifically, the rotating member 27 comprises a gear ring connecting plate 27-1 rotationally connected to the surface of the driving ring 23, and an oblique gear ring 27-2 fixedly connected to the outer end of the gear ring connecting plate 27-1, i.e., the end away from the driving ring 23, the oblique gear ring 27-2 being coaxial with the filter plate 17, and a gear 27-3 fixedly connected to the radially outer end surface of the cleaning roller 26-1, the gear 27-3 being engaged with the oblique gear ring 27-2, the oblique gear ring 27-2 being located below the support plate 26-2, and the top of the oblique gear ring 27-2 being slidingly connected with the support plate 26-2.

[0063] The rotating member 27 is driven by the engagement of the oblique gear ring 27-2 and the gear 27-3, when the driving ring 23 rotates, the oblique gear ring 27-2 is driven to move by the gear ring connecting plate 27-1, and then the gear 27-3 rotates, so that the cleaning roller 26-1 rotates, and the cleaning roller 26-1 rotates while rolling on the filter plate 17, which increases the contact range and cleaning force between the cleaning roller 26-1 and the surface of the filter plate 17, and further improves the cleaning efficiency and effect, and can more effectively remove impurities with strong adhesion on the filter plate 17, and the gear ring connecting plate 27-1 is used to connect the oblique gear ring 27-2 and the driving 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 the oblique gear ring 27-2 is fixedly connected with a sliding block 27-4 at the outer edge corresponding to the sliding groove 27-5, and the sliding groove 27-5 cooperates with the sliding block 27-4, i.e., 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 oblique gear ring 27-2 moves up and down, the sliding block 27-4 also slides up and down in the sliding groove 27-5, preventing the oblique gear ring 27-2 from deviating or shaking. The cooperation of the sliding block 27-4 and the sliding groove 27-5 provides guidance and limiting for the oblique gear ring 27-2, ensures that the oblique gear ring 27-2 smoothly slides along the predetermined direction during movement, prevents the oblique gear ring 27-2 from deviating or shaking, ensures the accurate and reliable engagement transmission between the oblique gear ring 27-2 and the gear 27-3, thereby ensuring that the cleaning roller 26-1 can stably rotate, maintaining good cleaning effect, and also improving the stability and durability of the overall structure of the rotating member 27.

[0066] Specifically, the collecting member 28 comprises an arc-shaped collecting frame 28-1 fixedly connected to one side of the driving ring 23, the top and one side of the arc-shaped collecting frame 28-1 are open, and the arc-shaped collecting frame 28-1 is fixedly connected with a collecting gear 28-2 at the top of one side.

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

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

[0069] The drainage hole 28-3 can timely drain the liquid in the arc-shaped collection frame 28-1, i.e., the liquid enters the arc-shaped collection frame 28-1 from top to bottom through the opening, and is drained out of the arc-shaped collection frame 28-1 through the drainage hole 28-3, avoiding the accumulation of liquid in the arc-shaped collection frame 28-1, affecting the collection and treatment of impurities, and the bent blocking edge 28-4 can block part of the impurities from separating from 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 clear that, in actual operation, due to factors such as impurity characteristics and fluid dynamics, the arc-shaped collection frame 28-1 cannot achieve complete collection of impurities, and the bent blocking edge 28-4 also cannot completely prevent the impurities from separating, however, the bent blocking edge 28-4 can effectively reduce the probability of impurities separating from the collection frame due to liquid scouring, air flow disturbance and other external forces, and when the cleaning roller 26-1 continuously cleans the filter plate 17, part of the impurities that are not captured by the arc-shaped collection frame 28-1 in time will be scraped and pushed again in the subsequent cleaning cycle, and finally enter the frame to complete the collection.

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

[0072] Specifically, the outer edge of the filter plate 17 is fixedly connected with a plurality of limiting blocks 17-1, the plurality of limiting blocks 17-1 are uniformly distributed, the inner cavity of the tower body 11 is provided with a plurality of longitudinally arranged limiting grooves 17-2, the inner cavity of each limiting groove 17-2 is fixedly connected with a second spring 17-3 at the bottom, and the top of each second spring 17-3 is fixedly connected with a group of limiting blocks 17-1, that is, the filter plate 17 is inserted into the plurality 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 descending and ascending process of the filter plate 17, in the descending process of the filter plate 17, the limiting block 17-1 slides in the limiting groove 17-2 to limit the descending position of the filter plate 17, preventing the filter plate 17 from excessively descending and damaging other components, and the second spring 17-3 is compressed when the filter plate 17 descends to store elastic potential energy, and when the liquid weight of the filter plate 17 is reduced, the second spring 17-3 releases the elastic potential energy to drive the filter plate 17 to reset, and at the same time, plays a buffering role in the resetting process, ensuring the stable resetting 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 driving ring 23 is provided with an arc-shaped guide groove 23-1, the surface of the driving rod 24 is provided with an arc-shaped ball rail 23-2, and the top of the driving rod 24 penetrates the driving 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 driving ring 23 cooperates with the arc-shaped ball rail 23-2 on the surface of the driving rod 24, and when the driving ring 23 slides along the driving rod 24, the driving ring 23 can be rotated to provide a power source for the self-cleaning assembly 2, and the sliding and rotating actions of the driving ring 23 can be converted and coordinated with each other, ensuring that the cleaning roller 26-1 can effectively clean the surface of the filter plate 17, improving the transmission efficiency and stability of the driving structure, and ensuring that the self-cleaning assembly 2 can reliably operate to realize continuous automatic cleaning of the filter plate 17.

[0076] Therefore, in the production process of high-purity diborane, the diborane mixed gas enters the tower body 11 through the feed pipe 19, is first filtered by the filter plate 17, and as the production continues, the filter plate 17 is gradually blocked, causing the liquid condensed by the condenser 12 to accumulate on the top of the filter plate 17.

[0077] First stage: liquid continuously accumulates on the filter plate 17, the weight increases, the bending clamp plate 22-1 is driven by the filter plate 17 to slide downward in the clamping groove 22-2, at this time, the driving ring 23 slides on the surface of the driving rod 24, due to the interaction of the arc-shaped guide groove 23-1 and the arc-shaped ball track 23-2, the driving ring 23 rotates, and in turn drives the cleaning roller 26-1 to clean the surface of the filter plate 17, at the same time, the bevel gear ring 27-2 meshes with the gear 27-3 to drive the cleaning roller 26-1 to rotate, thereby enhancing the cleaning effect, in this stage, the descending stroke of the filter plate 17 is relatively short, and the cleaning roller 26-1 rotates half a circle on the surface of the filter plate 17 with the driving ring 23 as the center, and the surface of the filter plate 17 is preliminarily cleaned.

[0078] Second stage: if the blockage is not completely solved after the first stage of cleaning, the bending clamp plate 22-1 continues to descend to contact the slope block 22-5, at this time, the liquid on the top of the filter plate 17 continues to increase, and the floating ring 22-61 drives the pushing rod 22-62 to continuously rise in the floating groove 22-63 under the action of liquid buoyancy.

[0079] Third stage: when the pushing rod 22-62 rises to contact the slope surface of the slope block 22-5, the slope block 22-5 slides into the containing groove 22-3, compressing the first spring 22-4, and then the slope block 22-5 releases the limit of the bending clamp plate 22-1, a large amount of liquid drives the filter plate 17 to move downward rapidly, the driving ring 23 slides on the surface of the driving rod 24 again, rotates under the action of the arc-shaped guide groove 23-1 and the arc-shaped ball track 23-2, and drives the cleaning roller 26-1 to clean more deeply, at the same time, the cleaning roller 26-1 rotates again through the cooperation of the bevel gear ring 27-2 and the gear 27-3, in this stage, the cleaning roller 26-1 can rotate a circle on the surface of the filter plate 17 with the driving ring 23 as the center, and the filter plate 17 is cleaned comprehensively.

[0080] After the filter plate 17 descends to the lowest position, the liquid is discharged through the filter plate 17, and in the descending process 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 not enough to completely compress the second spring 17-3, the second spring 17-3 drives the limiting block 17-1 and the filter plate 17 to reset, in the resetting process, the cleaning roller 26-1 reversely rotates on the filter plate 17, and the filter plate 17 is cleaned again, in the rotating process of the cleaning roller 26-1, the collecting gear 28-2 scrapes the impurities on the surface of the cleaning roller 26-1, part of the impurities enters the arc-shaped collecting frame 28-1 to be collected, the drain hole 28-3 discharges the liquid in the arc-shaped collecting frame 28-1, and the bending baffle 28-4 prevents the impurities from escaping, so as to realize the automatic cleaning of the filter plate 17 and guarantee the normal operation of the light tower.

[0081] Example 3

[0082] Referring toFigure 7 and Figure 12 As the third embodiment of the present application, which is based on the first two embodiments.

[0083] Specifically, the side of the push rod 22-62 close to the slope block 22-5 is provided with a ball structure.

[0084] When the liquid level in the light-removing tower decreases, the floating ring 22-61 drives the push rod 22-62 to fall back, and the ball replaces the traditional sliding friction by rolling friction, greatly reducing the contact resistance between the push rod 22-62 and the slope block 22-5. This low-friction operating mechanism can effectively avoid the risk of component jamming caused by excessive friction resistance, ensure smooth lifting action of the push rod 22-62 during liquid level change, and ensure the coordinated cooperation between the abutting member 22 and the components of the floating part 22-6, thereby maintaining the stable operation of the self-cleaning assembly 2 of the light-removing tower and avoiding the influence of mechanical jamming on the cleaning efficiency and reliability of the filter plate 17.

[0085] Embodiment 4

[0086] As shown in Figure 14 , it is a process flow diagram for producing high-purity diborane by using the above-mentioned light-removing tower. In this embodiment, first, 40 kg of potassium borohydride raw material is extracted from the silo and added to a 150 L reaction kettle. The reaction kettle is cooled to a preset temperature, and boron trifluoride raw material is introduced at a flow rate of 2 kg / h-2.2 kg / h to start the generation of diborane gas. The chemical reaction equation is as follows:

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

[0088] Then, after the boron trifluoride raw material is introduced, the temperature of the reaction kettle is slowly raised to -92°C, so that the reaction material in the liquid state in the reaction kettle is vaporized into gas and collected in the collection cold trap. The reaction residues generated during the reaction are collected in the residue tank.

[0089] Then, the temperature of the collection cold trap is slowly raised, and the diborane gas is gasified and introduced into the light-removing tower at a set flow rate of 0.4 kg / h-0.5 kg / h. The gas flow rate into the light-removing tower is controlled to prevent the flow rate from being too low, which will affect the processing capacity, and to prevent the flow rate from being too high, which will cause the rectifying tower to operate under excessive load and the product quality to be unqualified.

[0090] Under the set pressure and temperature, the light components such as nitrogen and oxygen are taken out from the top of the light-removing tower to the three-waste treatment system, and the light-removing components are taken out from the side line of the light-removing tower to the heavy-removing tower.

[0091] Subsequently, the heavy components are taken out from the tower bottom of the heavy component removal tower to the three-waste system under a set temperature and pressure, the high-purity diborane gas is taken out from the tower top of the heavy component removal tower, and finally the high-purity diborane gas is filled through the filling system.

[0092] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An environmentally friendly and energy-saving light-weight product removal tower, characterized in that: The self-cleaning assembly (2) comprises a sleeve (21) which is rotationally connected to the bottom center of the filter plate (17), the top of the filter plate (17) is connected with abutting pieces (22) on both sides respectively, the bottom of the sleeve (21) is rotationally connected with a driving ring (23), the bottom of the driving ring (23) is sleeved with a driving rod (24), the bottom of the driving rod (24) is fixedly connected with a fixed plate (25), the inner cavity of the tower body (11) is fixedly connected with the outer edge of the fixed plate (25), one side of the driving ring (23) is provided with a cleaning piece (26), the lower side of the cleaning piece (26) is provided with a rotating piece (27), one side of the cleaning piece (26) is provided with a collecting piece (28). Each of the abutting pieces (22) comprises a bent clamping plate (22-1) fixedly connected to the top of the filter plate (17), the inner cavity of the tower body (11) is provided with a clamping groove (22-2) corresponding to the bent clamping plate (22-1), each clamping groove (22-2) is matched with one bent clamping plate (22-1), so that the bent clamping plate (22-1) penetrates through the clamping groove (22-2) and can slide in the clamping groove (22-2), the upper part of the clamping groove (22-2) is communicated with a containing groove (22-3) on the side away from the bent clamping plate (22-1), the containing groove (22-3) is fixedly connected with a first spring (22-4) on the side away from the bent clamping plate (22-1), the first spring (22-4) is fixedly connected with a slope block (22-5) on the side close to the bent clamping plate (22-1), the slope block (22-5) is matched with the bent clamping plate (22-1), the lower side of the slope block (22-5) is provided with a floating part (22-6). Each of the abutting pieces (22) comprises a bent clamping plate (22-1) fixedly connected to the top of the filter plate (17), the inner cavity of the tower body (11) is provided with a clamping groove (22-2) corresponding to the bent clamping plate (22-1), each clamping groove (22-2) is matched with one bent clamping plate (22-1), so that the bent clamping plate (22-1) penetrates through the clamping groove (22-2) and can slide in the clamping groove (22-2), the upper part of the clamping groove (22-2) is communicated with a containing groove (22-3) on the side away from the bent clamping plate (22-1), the containing groove (22-3) is fixedly connected with a first spring (22-4) on the side away from the bent clamping plate (22-1), the first spring (22-4) is fixedly connected with a slope block (22-5) on the side close to the bent clamping plate (22-1), the slope block (22-5) is matched with the bent clamping plate (22-1), the lower side of the slope block (22-5) is provided with a floating part (22-6).

2. The energy-saving light component removal column according to claim 1, wherein: ​ 3. The energy-saving light component removal column according to claim 2, wherein: The floating part (22-6) comprises two groups of floating half-rings (22-61) arranged above the filter plate (17), the two groups of floating half-rings (22-61) are connected by a push rod (22-62), and each of the two sides of the clamping groove (22-2) is communicated with a floating groove (22-63), each push rod (22-62) penetrates through two adjacent floating grooves (22-63) and the clamping groove (22-2) between the two floating grooves (22-63), and slides in the corresponding floating groove (22-63) and the clamping groove (22-2), so that the floating groove (22-63) and the push rod (22-62) are matched.

4. The energy-saving light component removal column according to claim 3, wherein: The cleaning piece (26) comprises a cleaning roller (26-1) rotatably connected to one side of the driving ring (23) through a bearing, and one side of the cleaning roller (26-1) is rotatably connected with a supporting plate (26-2) through a bearing.

5. The energy-saving light component removal column according to claim 4, wherein: The rotating piece (27) comprises a gear ring connecting plate (27-1) rotatably connected to the surface of the driving ring (23), and the outer end of the gear ring connecting plate (27-1) is fixedly connected with a bevel gear ring (27-2), the top of the bevel gear ring (27-2) is slidably connected with the supporting plate (26-2), the radial outer end surface of the cleaning roller (26-1) is fixedly connected with a gear (27-3), and the top teeth of the bevel gear ring (27-2) are engaged with the gear (27-3).

6. The energy-saving light component removal column according to claim 5, wherein: The outer edge of the bevel gear ring (27-2) is fixedly connected with a sliding block (27-4), and the inner cavity of the tower body (11) is provided with a sliding groove (27-5), and the sliding groove (27-5) is matched with the sliding block (27-4).

7. The energy-saving light component removal column according to claim 1, wherein: The collecting piece (28) comprises an arc-shaped collecting frame (28-1) fixedly connected to one side of the driving ring (23), and the top and one side of the arc-shaped collecting frame (28-1) are open.

8. The energy-saving light component removal column according to claim 7, wherein: The outer edge of the filter plate (17) is fixedly connected with a plurality of evenly distributed limiting blocks (17-1), the inner cavity of the tower body (11) is provided with a plurality of longitudinally arranged limiting grooves (17-2), the inner cavity of each limiting groove (17-2) is fixedly connected with a second spring (17-3), and the top of each second spring (17-3) is fixedly connected with a group of limiting blocks (17-1).

9. The energy-saving light component removal column according to claim 8, wherein: The inner cavity of the driving ring (23) is provided with an arc-shaped guide groove (23-1), the surface of the driving rod (24) is provided with an arc-shaped ball rail (23-2), and the top of the driving rod (24) penetrates through the driving ring (23) and the sleeve (21) and extends to the top of the filter plate (17).

10. A process for producing diborane using the energy-saving light-removing column according to any one of claims 1 to 9, characterized by, The method comprises the following steps: S1, a predetermined amount of potassium borohydride is extracted from the silo and added to the reaction kettle, the reaction kettle is cooled to a preset temperature, and then boron trifluoride is introduced into the reaction kettle at a set flow rate to react; S2, slowly increase the temperature of the reaction kettle, vaporize the liquid reaction in the reaction kettle into gas, collect the gas in the collection cold trap, and collect the generated reaction residue in the residue tank; S3, slowly raise the temperature of the collection cold trap, make the gas therein vaporize, and enter the light-removing column at a set flow rate; S4, at a set pressure and temperature, take out the light-removing component from the side line of the light-removing column, and then enter the heavy-removing column; S5, at a set temperature and pressure, take out the high-purity diborane gas from the top of the heavy-removing column; and S6, fill the taken-out high-purity diborane gas.

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