Flow dividing structure, adsorption tank and assembly method of adsorption tank

Abstract

The invention discloses a flow dividing structure, an adsorption tank and an assembling method thereof, and relates to the technical field of flow dividing equipment, the flow dividing structure comprises a flow dividing pipe, a plurality of flow dividing plates and a porous assembly, one end of the flow dividing pipe is a blind end, the other end of the flow dividing pipe is an open end, a plurality of vent holes are formed in the side wall of the flow dividing pipe, and the flow dividing plates are connected with the porous assembly. A plurality of flow dividing plates are arranged in the flow dividing pipe, a flow dividing cavity is formed between every two adjacent flow dividing plates, gas in the flow dividing pipe can flow into the flow dividing cavities through the vent holes, the porous assembly is located on the blind end side of the flow dividing pipe, and gas in the flow dividing cavities can penetrate through the porous assembly. The adsorption tank comprises a flow dividing structure, the flow dividing structure is installed in a lower sealing head of the adsorption tank, the lower sealing head is connected with a gas-guide tube, and the flow dividing tube is communicated with the gas-guide tube. According to the invention, the uniform distribution effect of gas can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of diversion equipment technology, and in particular to a diversion structure, an adsorption tank, and an assembly method thereof. Background Technology

[0002] Pressure Swing Adsorption (PSA) is a novel gas adsorption and separation technology. It offers the following advantages: high product purity; it can generally operate at room temperature and relatively low pressure; bed regeneration does not require heating, resulting in high product purity; the equipment is simple, and operation and maintenance are convenient; continuous cyclic operation allows for full automation.

[0003] Pressure swing adsorption (PSA) technology is widely used in many fields, including coal mines, injection molding, brazing, tire nitrogen filling, SMT industry, semiconductor silicon industry, semiconductor packaging industry, electronic components industry, chemical and new materials industry, powder metallurgy, metal processing industry, heat treatment industry, food and pharmaceutical industry.

[0004] The design of the flow distribution structure in a pressure swing adsorption (PSA) nitrogen generator directly impacts product performance and is one of the core technologies of the entire system. Currently, the flow distribution structure in PSA nitrogen generators is mostly a porous plate structure, which uses the porous plate to locally distribute the gas from the gas delivery pipe. However, if the gas from the gas delivery pipe is directly introduced into the porous plate, most of the gas only passes through the center of the porous plate, while only a small amount of gas may pass through the edges. This makes it impossible to achieve effective and uniform gas distribution.

[0005] Therefore, there is an urgent need in this field for a novel diversion structure, adsorption tank, and assembly method to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a flow splitting structure, an adsorption tank, and an assembly method thereof to solve the problems existing in the prior art and to effectively improve the uniform distribution of the gas that needs to be split.

[0007] To achieve the above objectives, the present invention provides the following solution: This invention discloses a flow-dividing structure, including a flow-dividing pipe, a flow-dividing plate, and a porous assembly. One end of the flow-dividing pipe is a blind end, and the other end is an open end. Multiple vent holes are provided on the side wall of the flow-dividing pipe. Several flow-dividing plates are provided, and a flow-dividing chamber is formed between two adjacent flow-dividing plates. Gas in the flow-dividing pipe can flow into the flow-dividing chamber through the vent holes. The porous assembly is located on the blind end side of the flow-dividing pipe, and gas in the flow-dividing chamber can pass through the porous assembly.

[0008] Preferably, the porous assembly includes a first porous plate, a multi-layer mesh group, and a second porous plate arranged sequentially. The first porous plate is arranged adjacent to the diverter pipe, and the first porous plate, the multi-layer mesh group, and the second porous plate are fixedly connected by a fastening assembly.

[0009] Preferably, the fastening assembly includes a support ring, a fastening bolt, and a fastening nut. The limiting end of the fastening bolt is fixedly connected to the lower surface of the support ring. The threaded portion of the fastening bolt can pass upward through the first perforated plate, the multi-layer mesh group, and the second perforated plate in sequence. The fastening nut is threadedly connected to the threaded portion of the fastening bolt and is disposed adjacent to the second perforated plate.

[0010] Preferably, an asbestos pad is provided between the support ring and the first perforated plate.

[0011] Preferably, there is a gap between the second perforated plate and the flow divider plate.

[0012] Preferably, the sidewall of the diversion pipe has four vent holes and four diversion plates evenly distributed in the circumferential direction, and the four vent holes and four diversion plates are staggered.

[0013] The present invention discloses an adsorption tank, including the above-mentioned diversion structure, wherein the diversion structure is installed inside the lower end cap of the adsorption tank, the lower end cap is connected to a gas guide pipe, and the diversion pipe is connected to the gas guide pipe.

[0014] Preferably, the diverter pipe, the diverter plate, and the support ring are welded inside the lower end cap.

[0015] Preferably, one end of the diverter can extend into the air guide tube.

[0016] This invention discloses a method for assembling a diversion structure and an adsorption tank, based on the aforementioned adsorption tank, comprising the following steps: S1. Determine the dimensions and installation location of the fastening components; S2. Determine the size and distribution of the diversion pipe, vent, and air guide pipe; S3. Determine the size, shape, and quantity of the manifold; S4. Process each component; S5. Position and fix each component; S6. Assemble the porous components and fastening components.

[0017] The present invention achieves the following technical effects compared to the prior art: The gas splitter in this invention can evenly distribute the gas inside the splitter into each splitter chamber through its own vent holes, thus completing the first split of the gas. Then, the gas in each splitter chamber flows upward and passes through the corresponding porous component, which can perform a second split of the gas, thereby effectively improving the gas splitting effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. 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.

[0019] Figure 1 This is a schematic diagram of the flow splitting structure in Example 1; Figure 2 for Figure 1 AA section view in the middle; Figure 3 This is a schematic diagram of the flow divider plate in the flow divider structure of Embodiment 1; Figure 4 The flowchart illustrates the assembly method of the three-way flow structure and the adsorption tank in this embodiment. In the diagram: 1-Diverter pipe; 101-Vent hole; 2-Diverter plate; 3-Porous assembly; 301-First porous plate; 302-Multi-layer mesh group; 303-Second porous plate; 4-Diverter chamber; 5-Fastening assembly; 501-Support ring; 502-Fastening bolt; 503-Fastening nut; 504-Asbestos gasket; 6-Lower end cap; 7-Gas duct. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a flow splitting structure, an adsorption tank, and an assembly method thereof to solve the problems existing in the prior art and to effectively improve the uniform distribution of the gas that needs to be split.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1 like Figures 1-3 As shown, this embodiment provides a flow-dividing structure, including a flow-dividing pipe 1, a flow-dividing plate 2, and a porous assembly 3. The flow-dividing pipe 1 is a vertically arranged tubular structure, and one end of the flow-dividing pipe 1 (i.e., Figure 1 The upper end of the shunt pipe 1 is a blind end. To achieve this, a masking plate can be welded to the upper end of the shunt pipe 1. The other end of the shunt pipe 1 (i.e., the upper end) is a blind end. Figure 1 The lower end of the manifold (in the middle section) is the open end. Multiple vent holes 101 are provided on the side wall of the manifold 1, such as... Figure 1 As shown, the vent 101 has a U-shaped groove structure. The reason for setting the vent 101 as a U-shaped structure is that it is machined by a milling cutter, so machining a U-shaped structure is more convenient. Of course, those skilled in the art can also set the vent 101 as other shapes, such as elongated holes, rectangular holes, or other through-hole structures. Several flow dividers 2 are provided, and the space between two adjacent flow dividers 2 is a flow divider chamber 4. At least one vent 101 is provided between two adjacent flow dividers 2, allowing the gas in the flow divider 1 to flow into the flow divider chamber 4 through the vent 101. The porous assembly 3 is located on the blind end side of the flow divider 1 (i.e., the side of the flow divider 1 away from the open end, i.e....). Figure 1 (Above) the gas in the diversion chamber 4 can pass upward through the porous component 3.

[0024] In actual use, the gas entering the diversion pipe 1 from below will flow evenly into each diversion chamber 4 through the vent 101 under the continuous gas pressure, thus completing the first diversion of the gas. Then, the gas in each diversion chamber 4 will flow upward under the continuous gas pressure and pass through the porous component 3 above it. The porous component 3 can be used to perform a second diversion of the gas, thereby effectively improving the gas diversion effect.

[0025] In this embodiment, the porous component 3 includes a first porous plate 301, a multi-mesh mesh group 302, and a second porous plate 303 arranged sequentially from bottom to top. The cross-sectional shape and dimensions of the first porous plate 301, the multi-mesh mesh group 302, and the second porous plate 303 are identical. The first porous plate 301 and the second porous plate 303 are provided with multiple through holes. The diameter of the through holes and the distribution position of each through hole are the same on both the first and second porous plates 301; or the diameter of the through holes on the second porous plate 303 is smaller than the diameter of the through holes on the first porous plate 301, and the number of through holes on the second porous plate 303 is greater than the number of through holes on the first porous plate 301. This distribution method allows for more uniform gas distribution. The arrangement of the first porous plate 301 and the second porous plate 303 effectively and uniformly disperses the gas, preventing pressure imbalances that could lead to tipping over.

[0026] The multi-layer mesh group 302 includes multiple layers of stainless steel filter screens, stacked sequentially from bottom to top, with the pore size of each screen gradually decreasing from bottom to top. This multi-layer filter system allows for better airflow dispersion and effectively prevents trace amounts of powdered adsorbent (i.e., molecular sieves within the adsorption tank) from entering the pipeline under the impact of backflushing pressure, thus avoiding impact on the performance of downstream equipment.

[0027] from Figure 1 As can be seen, the first perforated plate 301 is located at the bottom of the perforated assembly 3, and is therefore adjacent to the diverter pipe 1. The first perforated plate 301, the multi-layer mesh group 302, and the second perforated plate 303 are fixedly connected by a fastening assembly 5. If any component of the first perforated plate 301, the multi-layer mesh group 302, or the second perforated plate 303 is damaged, the fastening assembly 5 can be released, and the damaged component can be replaced. This can greatly reduce the maintenance cost of the equipment.

[0028] In this embodiment, the fastening assembly 5 includes a support ring 501, a fastening bolt 502, and a fastening nut 503. The support ring 501 is a circular ring structure and is welded inside the lower end cap 6 of the adsorption tank. The limiting end (i.e., the large diameter end) of the fastening bolt 502 is welded and fixedly connected to the lower surface of the support ring 501. The threaded portion of the fastening bolt 502 can pass upward through the first perforated plate 301, the multi-layer mesh group 302, and the second perforated plate 303 in sequence. Then, the fastening nut 503 is threadedly connected to the upper threaded portion of the fastening bolt 502, and the fastening nut 503 is arranged adjacent to the second perforated plate 303. Finally, under the clamping action of the fastening nut 503 and the limiting portion of the fastening bolt 502, the first perforated plate 301, the multi-layer mesh group 302, and the second perforated plate 303 can be firmly fixed together. The purpose of welding the fastening bolt 502 to the support ring 501 in the opposite direction is that when the worker removes the fastening component 5, he only needs to loosen the fastening nut 503 to release the restraint on the first perforated plate 301, the multi-layer mesh group 302 and the second perforated plate 303, without removing the fastening bolt 502. Therefore, the installation or disassembly is more convenient and faster.

[0029] In this embodiment, an asbestos pad 504 is provided between the support ring 501 and the first porous plate 301. The asbestos pad 504 has a circular structure and its cross-section matches the shape of the support ring 501. The asbestos pad 504 serves two purposes: first, it provides a certain degree of sealing to prevent gas from flowing out from the gap between the first porous plate 301 and the support ring 501; second, it acts as a buffer to achieve a soft connection between the first porous plate 301 and the support ring 501, thereby avoiding the problem of wear caused by direct connection between the first porous plate 301 and the support ring 501; and third, the asbestos pad 504 provides support for the first porous plate 301.

[0030] In this embodiment, since the asbestos pad 504 may undergo compression deformation during the assembly of the porous component 3 and the fastening component 5, there is a gap between the second porous plate 303 and the diverter plate 2. The gap is generally set to about 5mm to provide installation allowance.

[0031] In this embodiment, four vent holes 101 and four diversion plates 2 are evenly distributed in the circumferential direction of the side wall of the diversion pipe 1, and the four vent holes 101 and four diversion plates 2 are staggered, that is, a vent hole 101 is provided between two adjacent diversion plates 2, and air can be supplied to a corresponding diversion chamber 4 through a vent hole 101.

[0032] Example 2 like Figure 1 As shown, the embodiment provides an adsorption tank, including the diversion structure disclosed in Embodiment 1.

[0033] In this embodiment, the adsorption tank can be a common tank structure, namely a cylindrical adsorption tank body, with an upper end cap at the upper end and a lower end cap 6 at the lower end. A molecular sieve is provided inside the adsorption tank, and the molecular sieve is located above the flow distribution structure. These are all common structures in existing adsorption tanks, so they will not be described in detail here.

[0034] The relative positional relationship between the diversion structure and the adsorption tank is referenced. Figure 1 It can be seen that the diversion structure is installed inside the lower head 6 of the adsorption tank. A gas guide pipe 7 is connected to the center of the lower surface of the lower head 6. The gas guide pipe 7 is vertically arranged, and a horizontally arranged air inlet pipe is connected to the right side of the gas guide pipe 7. An air inlet flange is provided at the right end of the air inlet pipe for connecting the air supply line. The diversion pipe 1 is connected to the gas guide pipe 7. When working, the gas entering from the air inlet pipe will enter the diversion pipe 1 through the gas guide pipe 7.

[0035] When the gas enters the gas guide pipe 7 through the inlet pipe under a certain pressure, the gas is evenly divided into multiple groups of airflow through the combination structure of the split pipe 1 and the split plate 2. This allows the airflow to be initially dispersed and filtered before entering the adsorbent layer (i.e., the molecular sieve in the adsorption tank). Then, it is evenly dispersed into the internal space of the adsorption tank through the multi-layer mesh group 302 structure supported by the split plate 2, thereby achieving a more effective gas splitting effect, improving the performance stability of the equipment, and thus enhancing the overall operating effect of the equipment.

[0036] In this embodiment, the diversion pipe 1, the diversion plate 2, and the support ring 501 are welded inside the lower head 6. Specifically, the diversion pipe 1 is welded to the center of the bottom of the lower head 6; the diversion plate 2... Figure 1 or Figure 3As can be seen, it is approximately a quarter-circle fan-shaped structure. Its vertical surface is welded to the outer wall of the diversion pipe 1, and its arc surface is welded to the inner wall of the lower head 6. A notch is provided on the horizontal surface at the upper end. The support ring 501 is located at the notch and is welded to the inner wall of the lower head 6.

[0037] In this embodiment, one end of the diversion pipe 1 can extend into the gas guide pipe 7. Specifically, the lower end of the diversion pipe 1 can extend into the gas guide pipe 7 by about 10mm. The purpose is to ensure that the water vapor and sewage in the adsorption tank during the pressure test and operation can directly and accurately enter the guide pipe through the diversion pipe 1, which is beneficial to the sewage discharge and cleaning of the adsorption tank.

[0038] Example 3 like Figure 4 As shown, this embodiment provides a method for assembling a diversion structure and an adsorption tank, based on the adsorption tank disclosed in Embodiment 2, including the following steps: S1. Determine the dimensions and installation positions of the fastening components 5. The position of the support ring 501 is designed based on the weld between the lower end cap 6 and the adsorption tank body. Its size and welding position should, in principle, not affect the pressure vessel's flaw detection points. Simultaneously, considering maximizing the effective internal space of the adsorption tank, a comprehensive calculation is performed to determine the optimal size. This increases the amount of adsorbent (including but not limited to the molecular sieve inside the adsorption tank), thereby improving the overall operating efficiency of the equipment. After determining the dimensions of the support ring 501, determine the distribution positions of the relevant fastening components 5 on the support ring 501 to ensure secure fastening and balanced force distribution.

[0039] S2. Determine the size and distribution of the diversion pipe 1, vent 101 and air guide pipe 7. Specifically, based on the system requirements such as pressure, flow rate, purity, fluid mechanics principles and damping coefficient, calculate the diameter of the inlet pipe, air guide pipe 7, the diameter of the diversion pipe 1 and the size and number of vent 101.

[0040] S3. Determine the size, shape and quantity of the diverter plate 2. The shape of the diverter plate 2 is determined based on the position and size of the support ring 501 and the effective length of the diverter pipe 1.

[0041] S4. Perform machining of each component, including the air guide pipe 7, air intake pipe, split pipe 1, split plate 2, and support ring 501.

[0042] S5. Position and fix each component, including welding between the diverter 1 and the mask (to form a blind end), welding between the diverter 2 and the diverter 1, welding between the support ring 501 and the lower end cap 6, welding between the fastening bolt 502 and the support ring 501, welding between the air inlet pipe and the air guide pipe 7, and positioning and welding between the air guide pipe 7 and the lower end cap 6.

[0043] S6. Assemble the porous component 3 and the fastening component 5 by sequentially installing the asbestos pad 504, the first porous plate 301, the multi-layer mesh group 302 and the second porous plate 303 on the fastening bolt 502, and finally tightening the fastening nut 503.

[0044] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0047] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0048] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0049] It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0050] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.

[0051] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0052] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A flow splitting structure, characterized by: The device includes a diverter (1), a diverter plate (2), and a porous assembly (3). One end of the diverter (1) is a blind end, and the other end of the diverter (1) is an open end. The side wall of the diverter (1) is provided with multiple vent holes (101). The diverter plate (2) is provided with several of them. The diverter chamber (4) is located between two adjacent diverter plates (2). The gas in the diverter (1) can flow into the diverter chamber (4) through the vent holes (101). The porous assembly (3) is located on the blind end side of the diverter (1). The gas in the diverter chamber (4) can pass through the porous assembly (3).

2. The flow splitting structure of claim 1, wherein: The porous assembly (3) includes a first porous plate (301), a multi-layer mesh group (302), and a second porous plate (303) arranged sequentially. The first porous plate (301) is arranged adjacent to the diversion pipe (1), and the first porous plate (301), the multi-layer mesh group (302), and the second porous plate (303) are fixedly connected by a fastening assembly (5).

3. The flow splitting structure of claim 2, wherein: The fastening assembly (5) includes a support ring (501), a fastening bolt (502), and a fastening nut (503). The limiting end of the fastening bolt (502) is fixedly connected to the lower surface of the support ring (501). The threaded portion of the fastening bolt (502) can pass upward through the first perforated plate (301), the multi-layer mesh group (302), and the second perforated plate (303) in sequence. The fastening nut (503) is threadedly connected to the threaded portion of the fastening bolt (502). The fastening nut (503) is arranged adjacent to the second perforated plate (303).

4. The flow splitting structure of claim 3, wherein: An asbestos pad (504) is provided between the support ring (501) and the first perforated plate (301).

5. The flow splitting structure of claim 2, wherein: There is a gap between the second perforated plate (303) and the flow divider plate (2).

6. The flow splitting structure of claim 1, wherein: The sidewall of the diversion pipe (1) is evenly distributed with four vent holes (101) and four diversion plates (2) in the circumferential direction, and the four vent holes (101) and four diversion plates (2) are staggered.

7. A canister, characterized by: The device includes the diversion structure described in any one of claims 1-6, wherein the diversion structure is installed inside the lower end cap (6) of the adsorption tank, the lower end cap (6) is connected to a gas guide pipe (7), and the diversion pipe (1) is connected to the gas guide pipe (7).

8. The canister of claim 7, wherein: The diversion pipe (1), the diversion plate (2), and the support ring (501) are welded inside the lower end cap (6).

9. The canister of claim 7, wherein: One end of the diverter tube (1) can extend into the air duct (7).

10. A method for assembling a diversion structure and an adsorption tank, characterized in that, Based on the adsorption tank according to any one of claims 7-9, the process includes the following steps: S1. Determine the dimensions and installation location of the fastening assembly (5); S2. Determine the size and distribution of the diversion pipe (1), vent (101) and air guide pipe (7); S3. Determine the size, shape, and quantity of the manifold (2); S4. Process each component; S5. Position and fix each component; S6. Assemble the porous component (3) and the fastening component (5).

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