Gas distribution device of adsorption tower

Abstract

The embodiment of the invention discloses a gas distribution device of an adsorption tower. The gas distribution device comprises a main gas path, gas distribution branches and an ore screen pipe, one end of the main gas path is positioned on the outer side of the adsorption tower and is connected with a gas source, the other end of the main gas path is communicated with at least two gas distribution branches, and each gas distribution branch is communicated with the ore screen pipe; the ore sieve pipe is embedded in the adsorbent bed layer and is provided with a gas outlet structure. The molecular sieve impact risk is reduced and the adsorption efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of gas processing, and in particular to an adsorption tower gas separation device. Background Art

[0002] In traditional PSA (pressure swing adsorption) technology, when the adsorption tower switches to the intake phase, high-pressure gas instantly enters the tower, generating a violent shock wave. Due to the high gas velocity and dramatic pressure fluctuations, a turbulent zone easily forms at the intake end, causing the airflow to directly impact the molecular sieve bed in a strong impact state, causing the molecular sieve particles to move, sink, or even break. Furthermore, repeated pressure fluctuations can exacerbate uneven adsorbent accumulation, leading to localized failures, reducing adsorption efficiency, and reducing equipment life. Consequently, traditional PSA systems are commonly plagued by issues such as fragile molecular sieves and uneven intake.

[0003] There is currently no effective solution to the above problems in the prior art. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides an adsorption tower gas separation device. By setting up gas separation branches and setting a mineral sieve tube on each gas separation branch, when the adsorption tower is intaken with air, the mineral sieve tube can complete omnidirectional effective exhaust to the outside to complete gas buffering, thereby solving the problem in the prior art that the molecular sieve is easily damaged and failed by impact.

[0005] To achieve the above-mentioned purpose, the present invention provides an adsorption tower gas separation device, comprising: a main gas path, a gas branch path and a mineral screen pipe; one end of the main gas path is located outside the adsorption tower and connected to the gas source, and the other end is connected to at least two gas branch paths, each of which is connected to the mineral screen pipe; the mineral screen pipe is buried in the adsorbent bed and has a gas outlet structure.

[0006] Further optionally, the outer wall of the ore screen tube is provided with gas outlets with uniform spacing, and the width of the gas outlets is smaller than the minimum particle size of the adsorbent.

[0007] Further optionally, an air distribution bag is provided between the main air path and the air distribution branch, and the air distribution bag is a hollow cavity structure.

[0008] Further optionally, the ore screen pipe is connected to the corresponding gas distribution branch through an internal joint.

[0009] Further optionally, the inner joint is a flexible connector.

[0010] Further optionally, a detachable pipe cap is provided at the free end of the gas distribution branch.

[0011] Further optionally, the main gas path is connected to four gas branch paths, and the four gas branch paths are evenly arranged on the same horizontal plane; each gas branch path is connected to two ore screen tubes, and the two ore screen tubes are correspondingly arranged.

[0012] Further optionally, a spiral guide plate is provided on the inner wall of the main gas path.

[0013] Further optionally, a flow limiting orifice plate is provided inside the gas branch, and the flow limiting orifice plate is provided with a plurality of small holes of equal diameter or gradually varying apertures.

[0014] Further optionally, the tail end of the ore screen pipe is closed, and a plurality of partitions are provided inside the ore screen pipe along the length direction, with gaps reserved between the partitions and the pipe wall of the ore screen pipe.

[0015] The above technical solution has the following beneficial effects: high-pressure gas first enters multiple gas distribution branches and mineral screen tubes through the main gas path and is dispersed step by step, which effectively reduces the impact force of the instantaneous release of gas on the molecular sieve and reduces the risk of molecular sieve sinking and damage; the mineral screen tube adopts a uniformly distributed gas outlet structure to achieve slow diffusion of gas from multiple points at the same time, ensuring a more balanced airflow distribution in the adsorbent bed and improving adsorption efficiency; the main gas path can be connected to multiple gas distribution branches, and each branch is connected to multiple mineral screen tubes to form a standardized gas distribution unit, which is suitable for the expansion needs of adsorption towers of different sizes. The system layout is flexible and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 2. It is a top view of the adsorption tower gas separation device provided in an embodiment of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the adsorption tower provided by an embodiment of the present invention from another perspective.

[0019] Reference numerals: 1-main gas line; 2-gas distribution bag; 3-gas distribution branch line; 4-ore screen pipe; 5-internal joint; 6-pipe cap. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In order to solve the problem that the molecular sieve is easily damaged by impact during the adsorption tower inflation process in the prior art, the embodiment of the present invention provides an adsorption tower gas separation device, please refer to Figure 1-Figure 2 , Figure 1 2. It is a top view of the adsorption tower gas separation device provided in an embodiment of the present invention; Figure 2 It is a structural schematic diagram of the adsorption tower provided by an embodiment of the present invention from another perspective.

[0022] The device includes: a main gas path 1, a gas branch path 3 and a mineral sieve tube 4; one end of the main gas path 1 is located outside the adsorption tower and connected to the gas source, and the other end is connected to at least two gas branch paths 3, each of which is connected to a mineral sieve tube 4; the mineral sieve tube 4 is buried in the adsorbent bed and has a gas outlet structure.

[0023] One end of the main gas path 1 is located outside the adsorption tower body and connected to the high-pressure gas source pipeline for receiving the source gas. The other end extends into the adsorption tower and serves as the main channel for the entire air intake system. The main gas path 1 is used to introduce high-pressure gas into the gas distribution structure. A gas distribution bag 2 can also be installed inside or at the end of the main gas path for gas buffering and pressure equalization and diversion.

[0024] The main gas line 1 is connected to multiple gas distribution branches 3. There are at least two gas distribution branches 3, each oriented in different directions and preferably evenly spaced along the bottom of the adsorption tower. Each gas distribution branch 3 branches off from the main gas line 1, extending laterally and connecting to multiple ore screens 4. The function of the gas distribution branches 3 is to further disperse the gas in the main gas line 1 to different areas, achieving multi-point gas supply.

[0025] Each gas distribution branch 3 is connected to at least one sieve tube 4. Multiple sieve tubes 4 face different directions and are preferably evenly spaced. The sieve tubes 4 are cylindrical, hollow structures embedded in the adsorbent bed. Their outer walls are equipped with uniformly distributed gas outlets, allowing for uniform gas permeation and discharge. The sieve tubes 4 are made of metal, extending their service life.

[0026] As an optional embodiment, the outer wall of the ore screen tube 4 is provided with gas outlets with uniform spacing, and the width of the gas outlets is smaller than the minimum particle size of the adsorbent.

[0027] The gas outlets are evenly distributed along the length of the ore screen tube 4 and have a reasonable width, specifically smaller than the minimum particle size of the adsorbent particles, preferably between 0.2 mm and 0.6 mm, to prevent the adsorbent particles from entering the ore screen tube 4 and causing blockage.

[0028] The setting of the gas outlet structure has two functions: on the one hand, the gas is released uniformly at multiple points through the gas outlet, so that the high-pressure intake air is fully diffused when passing through the mine screen tube 4, effectively reducing the local pressure mutation caused by single-point impact; on the other hand, since the size of the gas outlet is smaller than the adsorbent particles, a natural particle isolation barrier can be formed to prevent the adsorbent from reversely entering the mine screen tube 4 and blocking the airway, thereby ensuring the long-term stable operation of the gas distribution system.

[0029] As an optional implementation, an air distribution bag 2 is provided between the main air path 1 and the air distribution branch 3, and the air distribution bag 2 is a hollow cavity structure.

[0030] The gas distribution bag 2 is a hollow cavity structure, preferably a cylindrical or box-shaped metal structure, with a cavity inside, which is used to achieve gas buffering and pressure equalization functions.

[0031] In this device, gas is fed from a high-pressure source through the main gas path 1. Due to the high initial pressure and rapid flow rate, if it were to flow directly into multiple gas distribution branches 3, it would easily cause uneven airflow distribution or instantaneous impact. By providing the gas distribution bag 2, the high-pressure gas is first diffused, buffered, and stabilized within the hollow cavity. Thus, when the pressure is essentially balanced, it is then flowed into each gas distribution branch 3.

[0032] As an optional implementation, the ore screen pipe 4 is connected to the corresponding gas distribution branch 3 through an internal joint 5.

[0033] The internal joint 5 is a connecting structure provided between the inlet of the ore screen 4 and the outlet of the gas distribution branch 3. Its main body can be a cylindrical hollow pipe, which ensures a reliable connection between the two in terms of structure and gas flow. The internal joint 5 can be secured by welding, threading, snap-fit ​​connection, or flexible sealing. The specific connection method can be selected based on the material properties and operating conditions. Preferably, the internal joint 5 is equipped with an annular sealing ring or pressure-resistant rubber gasket to prevent leakage of high-pressure gas at the connection.

[0034] As an optional embodiment, the inner joint 5 is a flexible connector.

[0035] The internal joint 5 is a flexible connector used to achieve a flexible and sealed connection between the ore screen 4 and the corresponding gas distribution branch 3. The flexible connector can be a pressure-resistant rubber tube, a corrugated hose, or a silicone sleeve with elastic sealing function. Its two ends are respectively connected or inserted into the connection ports of the ore screen 4 and the gas distribution branch 3, and are fixed and sealed by a clamp, clamping ring, or threaded ring.

[0036] As an optional embodiment, a detachable pipe cap 6 is provided at the free end of the gas distribution branch 3 .

[0037] The cap 6 seals the end of the gas distribution branch 3, preventing gas leakage from the branch end. It also features a structure that facilitates assembly and disassembly. The cap 6 preferably has a threaded, snap-on, or flanged connection structure. The appropriate sealing method can be selected based on the specific operating environment and pressure level. The cap 6 should be constructed of materials that exhibit excellent pressure, corrosion, and high-temperature resistance. Common materials include stainless steel, engineering plastics, or high-strength aluminum alloys.

[0038] As an optional implementation, the main gas path 1 is connected to four gas branch paths 3, which are evenly arranged on the same horizontal plane; each gas branch path 3 is connected to two ore screen tubes 4, which are correspondingly arranged.

[0039] The main gas path 1 is connected to four gas branch paths 3, which are spaced apart and evenly distributed on the same horizontal plane at the bottom of the adsorption tower. The gas branch paths 3 are evenly distributed on both sides of the main gas path 1 to form a cross or symmetrical distribution structure, thereby achieving equidistant delivery and balanced diffusion of airflow in the bottom area of ​​the adsorption tower.

[0040] Furthermore, each gas distribution branch 3 is connected to two ore screens 4, which are symmetrically arranged around the gas distribution branch 3 and extend to the left and right sides, respectively. This "one branch + two ore screens 4" arrangement constitutes a complete gas distribution unit structure, which together achieves a blanket gas supply to the adsorbent bed.

[0041] As an optional implementation, a spiral guide plate is provided on the inner wall of the main gas path 1 .

[0042] The spiral guide plate extends in a spiral shape along the axial direction of the main gas path 1 and is fixed on the inner wall of the main gas path 1 to guide the inflowing gas and control the turbulence.

[0043] The structure of the spiral guide plate can be a single-line spiral or a multi-line spiral. The plate body is fixed to the inner wall of the main gas path 1 by welding or mechanical clamping. The spiral angle and pitch are designed and optimized according to the diameter of the main gas path 1 and the gas flow rate parameters.

[0044] As an optional implementation, a flow limiting orifice plate is provided inside the gas branch 3 , and the flow limiting orifice plate is provided with a plurality of small holes of equal or gradually varying diameters.

[0045] The flow limiting orifice is fixedly installed in the middle section of the gas branch 3 or near the connection end of the ore screen 4. The flow limiting orifice is a thin-walled metal plate or a high-strength synthetic material plate with multiple small holes evenly or in a specific pattern on its surface. It is used to limit the flow of gas flowing through the gas branch 3.

[0046] The apertures can be of constant diameter to achieve uniform flow restriction, or they can have a tapered aperture structure, where the aperture gradually decreases or increases along the direction of the airflow, thereby guiding and controlling the flow. The aperture range can be designed based on the system pressure and gas properties, with a common range of 0.5mm to 2mm.

[0047] As an optional embodiment, the tail end of the ore screen tube 4 is closed, and a plurality of partitions are provided inside the ore screen tube along the length direction, with gaps reserved between the partitions and the tube wall of the ore screen tube 4 .

[0048] The tail end of the ore screen tube 4 is a closed structure to prevent gas from escaping directly from the end of the pipe, ensuring orderly diffusion of gas through the evenly distributed gas outlets on the sidewall of the tube. To further optimize the diffusion path and distribution of gas, the ore screen tube 4 is equipped with multiple baffles along its length.

[0049] The baffles are circular or nearly circular structural plates, arranged perpendicular to the axis of the ore screen tube 4 and spaced apart. The outer diameter of each baffle is slightly smaller than the inner diameter of the ore screen tube 4, and an annular gap is reserved between the baffle and the tube wall. The gap width is set according to the gas flow rate and pressure drop requirements, and is generally between 0.5mm and 2mm.

[0050] The above technical solution has the following beneficial effects: high-pressure gas first enters multiple gas distribution branches and mineral screen tubes through the main gas path and is dispersed step by step, which effectively reduces the impact force of the instantaneous release of gas on the molecular sieve and reduces the risk of molecular sieve sinking and damage; the mineral screen tube adopts a uniformly distributed gas outlet structure to achieve slow diffusion of gas from multiple points at the same time, ensuring a more balanced airflow distribution in the adsorbent bed and improving adsorption efficiency; the main gas path can be connected to multiple gas distribution branches, and each branch is connected to multiple mineral screen tubes to form a standardized gas distribution unit, which is suitable for the expansion needs of adsorption towers of different sizes. The system layout is flexible and has strong versatility.

[0051] The specific implementation methods of the above inventions further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above content is only the specific implementation methods of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adsorption tower gas separation device, characterized in that: include: Main gas line, gas branch line and mine screen pipe; One end of the main gas path is located outside the adsorption tower and connected to the gas source, and the other end is connected to at least two gas branches, each of which is connected to the ore screen pipe; The ore screen pipe is buried in the adsorbent bed layer and has a gas outlet structure.

2. The adsorption tower gas separation device according to claim 1, characterized in that: The outer wall of the ore screen tube is provided with gas outlets with uniform spacing, and the width of the gas outlets is smaller than the minimum particle size of the adsorbent.

3. The adsorption tower gas separation device according to claim 1, characterized in that: An air distribution bag is provided between the main air path and the air distribution branch, and the air distribution bag is a hollow cavity structure.

4. The adsorption tower gas separation device according to claim 1, characterized in that: The ore screen pipe is communicated with the corresponding gas distribution branch through an internal joint.

5. The adsorption tower gas separation device according to claim 4, characterized in that: The inner joint is a flexible connector.

6. The adsorption tower gas separation device according to claim 1, characterized in that: The free end of the gas distribution branch is provided with a detachable pipe cap.

7. The adsorption tower gas separation device according to claim 1, characterized in that: The main gas circuit is connected to four gas branch circuits, and the four gas branch circuits are evenly arranged on the same horizontal plane; Each gas distribution branch is connected to two ore screen pipes, and the two ore screen pipes are set correspondingly.

8. The adsorption tower gas separation device according to claim 1, characterized in that: The inner wall of the main gas path is provided with a spiral guide plate.

9. The adsorption tower gas separation device according to claim 1, characterized in that: A flow limiting orifice plate is provided inside the gas branch circuit, and the flow limiting orifice plate is provided with a plurality of small holes of equal diameter or gradually varying diameter.

10. The adsorption tower gas separation device according to claim 1, characterized in that: The tail end of the ore screen pipe is closed, and a plurality of partitions are arranged inside the ore screen pipe along the length direction, with gaps reserved between the partitions and the pipe wall of the ore screen pipe.

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