Anti-adsorbent pulverized type adsorption column

Abstract

The utility model discloses an anti-adsorbent powder type adsorption tower, including: adsorption tower body, gas production main line and gas inlet main line, the gas inlet end of gas production main line is located adsorption tower body's inside top side, and the gas outlet end is located adsorption tower body's outside, the gas inlet end of gas inlet main line is located adsorption tower body's inside bottom side, and the gas outlet end is located adsorption tower body's outside, gas inlet main line and gas production main line all include following structure: main line, at least two branch gas pipe lines with main line connection and at least two mineral sieve pipes of every branch gas pipe line connection, mineral sieve pipe is buried in adsorbent bed layer, wherein the size of mineral sieve pipe is designed according to adsorption tower, thereby reducing the powder of adsorbent, improve gas adsorption efficiency.

Description

Technical Field

[0001] This utility model relates to the field of PSA air separation, and in particular to an adsorption tower that resists adsorbent pulverization. Background Technology

[0002] In recent years, with the continuous growth in demand for high-purity gases in fields such as BD (1,3-butadiene) deep processing, shipbuilding, coal mine safety, new energy storage, and medical oxygen production, the scale of PSA (Pressure Swing Adsorption) systems in industrial applications has been expanding, and the processing capacity and structural size of single units have significantly increased. At the same time, the increased volume and inlet gas velocity of the adsorption tower bring stronger gas impact forces, leading to decreased bed stability and problems such as adsorbent migration, collapse, and pulverization, seriously affecting adsorption efficiency and service life. Especially under high-frequency adsorption / desorption cycle conditions, pulverized adsorbent can also cause cascading failures such as pipeline blockage and molecular sieve contamination. Therefore, optimizing the internal airflow distribution of the adsorption tower, reducing the pressure fluctuation transmission path, and enhancing the adsorbent's resistance to pulverization from a structural design perspective have become one of the core challenges in the current upgrade and high-reliability design of PSA systems.

[0003] There is currently no effective solution to the above problems in existing technologies. Utility Model Content

[0004] To address the aforementioned issues, this invention provides an adsorption tower designed to prevent adsorbent pulverization. By using a mining screen tube to discharge air from all sides, it avoids the problem of single-hole air outlets easily impacting the adsorbent layer. By controlling the area of ​​the mining screen tube, it ensures smooth and uniform airflow, thereby solving the problem of adsorbent pulverization in existing technologies.

[0005] To achieve the above objectives, this utility model provides an adsorption tower resistant to adsorbent pulverization, comprising: an adsorption tower body, a main gas production pipeline, and a main gas inlet pipeline; the inlet end of the main gas production pipeline is located inside the top side of the adsorption tower body, and the outlet end is located outside the adsorption tower body; the inlet end of the main gas inlet pipeline is located inside the bottom side of the adsorption tower body, and the outlet end is located outside the adsorption tower body; both the main gas inlet pipeline and the main gas production pipeline include the following structure: a main pipeline, at least two branch gas pipelines connected to the main pipeline, and at least two mining screens connected to each branch gas pipeline, wherein the mining screens are buried in the adsorbent bed; the parameters of the mining screens must satisfy the following formula: S=(K×π×B×D×L) / (A+B); where S is the flow area of ​​a single mining screen; A is the width of the screen bar of the mining screen; B is the gap width of the mining screen; K is the effective flow area coefficient; D is the outer diameter of the mining screen; and L is the length of the flow portion of the screen.

[0006] Optionally, the flow area of ​​the mine screen pipe is calculated by the following formula: Vx = YS; where Vx is the cross-sectional area of ​​the gas distribution pipe corresponding to the mine screen pipe; and Y is the number of mine screen pipes.

[0007] Optionally, the effective circulation area coefficient K can be in the range of 0.8-0.9.

[0008] Further optionally, the width of the sieve bar is 1.4-1.6 mm and the length is 1.9-2.0 mm; the gap width is 0.3 times the average particle size of the adsorbent.

[0009] Alternatively, the adsorption tower body is provided with a coconut fiber mat inside, which is located on the top side of the main gas production pipeline and is pressed tightly onto the top of the adsorption tower body by a cap.

[0010] Optionally, the outside of the adsorption tower body is provided with lifting lugs and a barometer, the barometer being used to monitor the air pressure inside the adsorption tower body.

[0011] Alternatively, the inner wall of the adsorption tower body is provided with a wear-resistant lining.

[0012] Alternatively, the adsorption tower body is provided with an exhaust port, which is connected to a safety valve.

[0013] Optionally, the intake manifold and the production manifold are each equipped with a control valve.

[0014] Alternatively, the bottom of the adsorption tower body is provided with a support base.

[0015] The above technical solution has the following beneficial effects: Through the three-stage gas distribution structure of "inlet main pipe - gas distribution pipe - mine screen pipe", combined with the precise matching of the flow area parameters of the mine screen pipe, the inlet airflow is fully diffused and slowed down before entering the adsorbent bed, effectively reducing the direct impact of local high-pressure airflow on the adsorbent and reducing pulverization and particle breakage; by using multiple mine screen pipes evenly distributed and buried inside the bed, combined with the adjustable gas distribution pipeline layout, the gas distribution at the bottom and middle of the adsorption tower is more uniform, avoiding the problems of "flow deviation" or "airflow dead zone", thereby improving adsorption efficiency and bed utilization; by establishing a mathematical model between the mine screen pipe parameters and the total flow area, the engineering design and quantitative control of the adsorption tower pneumatic system are realized, which facilitates modular development and mass promotion. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the internal structure of the adsorption tower body provided in this embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the intake manifold provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the external structure of the adsorption tower body provided in this embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the mining screen tube provided in this embodiment of the utility model.

[0021] Attached diagram labels: 1-Main production pipeline; 2-Main air inlet pipeline; 201-Main main pipeline; 202-Gas distribution pipeline; 203-Mining screen pipe; 3-Adsorption tower body; 4-Support base; 5-Control valve; 6-Coconut pad; 7-End cap; 8-Pressure gauge. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To address the problem of adsorbent pulverization in existing technologies, this invention provides an adsorption tower resistant to adsorbent pulverization, comprising: an adsorption tower body 3, a gas production main pipeline 1, and a gas inlet main pipeline 2; the gas production main pipeline 1 has its inlet end located inside the top side of the adsorption tower body 3, and its outlet end located outside the adsorption tower body 3; the gas inlet end of the gas inlet main pipeline 2 is located inside the bottom side of the adsorption tower body 3, and its outlet end is located outside the adsorption tower body 3; both the gas inlet main pipeline 2 and the gas production main pipeline 1 include the following... Structure: Main pipeline 201, at least two branch pipelines 202 connected to the main pipeline 201, and at least two mining screen pipes 203 connected to each branch pipeline 202, wherein the mining screen pipes 203 are buried in the adsorbent bed; the parameters of the mining screen pipes must satisfy the following formula: S=(K×π×B×D×L) / (A+B); where S is the flow area of ​​a single mining screen pipe; A is the width of the screen bar of the mining screen pipe; B is the gap width of the mining screen pipe; K is the effective flow area coefficient; D is the outer diameter of the mining screen pipe; and L is the length of the flow portion of the screen pipe.

[0024] The adsorption tower body 3 is a cylindrical container used to contain adsorbent materials (such as molecular sieves, activated carbon, etc.) and to bear the physical changes of the gas during the adsorption-desorption process. The top and bottom of the adsorption tower body 3 are respectively provided with a gas production main pipeline 1 and a gas inlet main pipeline 2 to complete the gas exchange.

[0025] The gas inlet of the main gas pipeline 1 is located in the top interior area of ​​the adsorption tower body 3 to collect the product gas purified by the adsorbent layer; the outlet is located outside the adsorption tower body and connected to the subsequent gas storage tank or the use system.

[0026] The main gas production pipeline 1 is internally equipped with: a main pipeline 201; multiple branch gas pipelines 202 branching off from the main pipeline 201; and each branch gas pipeline 202 is connected to at least two mine screen pipes 203. The mine screen pipes 203 are horizontally embedded and buried above the adsorbent bed to uniformly discharge the produced gas, avoid turbulent air suction at the top, and improve the gas production efficiency.

[0027] The inlet end of the main inlet pipe 2 is located in the bottom internal area of ​​the adsorption tower body 3 and is connected to the gas source; the outlet end is connected to the gas source inlet outside the tower body. The main inlet pipe 2 also includes: a main pipe 201; at least two branch pipes 202; each branch pipe 202 is connected to at least two mining screen pipes 203. These mining screen pipes 203 are buried in the lower part of the adsorbent bed to slowly disperse the high-pressure raw material gas into the bed, prevent the formation of concentrated airflow impact, protect the stability of the adsorbent particle structure, and reduce pulverization.

[0028] In order to further optimize gas distribution and suppress adsorbent migration and pulverization, this invention establishes a flow area parameter model to quantitatively constrain the structure of the mine screen tube 203.

[0029] Each 203 mine screen tube must meet the following formula for calculating the flow area:

[0030]

[0031] Where: S is the effective flow area of ​​a single mine screen tube 203 (unit: mm) 2 A is the width of the screen bar (unit: mm), used to represent the width of the metal bar in the mining screen tube 203; B is the gap width (unit: mm); K is the effective flow area coefficient, which takes into account the actual ratio of the gap to the resistance of the mining screen; D is the outer diameter of the mining screen tube (unit: mm), which affects the airflow resistance and flow distribution; L is the length of the flow passage (unit: mm), that is, the total length of the gap section, which can be selected according to the actual size of the adsorption tower.

[0032] The introduction of this formula achieves a coordinated match between the internal gas channels of the adsorption tower and the mechanical properties of the adsorbent particles. Based on this, the total flow area, the number of gas distribution pipes, and the density of the mine screen pipes can be precisely designed, thereby improving the overall operating performance of the adsorption tower.

[0033] As an optional implementation, the flow area of ​​the mine screen tube is calculated using the following formula:

[0034] V x =YS;

[0035] Among them, V x Y represents the cross-sectional area of ​​the gas distribution pipeline corresponding to the mine screen pipe; Y represents the number of mine screen pipes.

[0036] First, calculate the cross-sectional area D of the main pipeline based on its radius. x According to the cross-sectional area D x Calculate the cross-sectional area V of the main pipe x To ensure that the airflow is adequately buffered and dispersed when entering the adsorption tower, this embodiment suggests setting the following:

[0037] The cross-sectional area V of all gas distribution pipes x The sum should be slightly greater than the cross-sectional area D of the main pipeline. x This is to prevent gas "accumulation" in the main pipeline or turbulence at the outlet, thereby protecting the stability of the adsorbent bed and reducing pulverization.

[0038] As an optional implementation method, the effective circulation area coefficient K can be in the range of 0.8-0.9.

[0039] The effective flow area coefficient K is a dimensionless coefficient whose value depends on the geometry of the mine screen pipe, the form of the slot opening, the edge effect, and the gas flow state. To balance airflow smoothness and structural strength, the preferred value range of K in this invention is K = 0.8 to 0.9. This coefficient indicates that the actual effective flow area is approximately 80% to 90% of the geometric flow area. K is preferably 0.85.

[0040] As an optional implementation, the sieve bar width is 1.4-1.6 mm and the length is 1.9-2.0 mm; the gap width is 0.3 times the average particle size of the adsorbent.

[0041] The preferred screen bar width of the mining screen tube is 1.4–1.6 mm to ensure that the mining screen tube has sufficient mechanical strength to resist the airflow impact and particle collision during the high-frequency pressure change process of the adsorption tower.

[0042] The effective flow length L of the screen bars is preferably 1.9–2.0 mm to ensure the continuity and uniformity of the ventilation area, while also facilitating modular installation. The mining screen pipe 203 is secured at both ends with tie rods, and the screen bar size is preferably 1.5*2.0 mm. The circumferential screen bar gap is less than or equal to 0.4 mm, and the outer diameter is 76 mm. The preferred material is 60Cr19Ni10 stainless steel. The circumferential screen bars and longitudinal screen bars are interlocked by 1 / 3 of their thickness.

[0043] The slit width B of the mining screen tube is set to 0.3 times the average particle size of the adsorbent, which can effectively prevent adsorbent particles from entering the inside of the screen tube, avoid clogging or particle accumulation, and thus ensure the stability and maintainability of long-term operation.

[0044] As an optional implementation, the adsorption tower body 3 is provided with a coconut pad inside, which is located on the top side of the gas production main pipeline 1 and is pressed tightly onto the top of the adsorption tower body 3 by a cap.

[0045] The coconut fiber mat is installed on the top side of the main gas production pipeline 1, serving a dual function of physical containment and particle filtration. Made of natural or modified plant fibers (such as coconut shell fiber), the mat possesses good elasticity, air permeability, and pressure resistance, effectively buffering airflow disturbances and preventing bed disturbances or adsorbent detachment with the production gas flow. To ensure the coconut fiber mat remains in its fixed position and adheres tightly to the bed during operation, it is secured by a cap at the top, which is fixed to the top of the adsorption tower body 3. This cap serves both to limit and compact the mat, and facilitates maintenance and replacement.

[0046] As an optional implementation, the outer side of the adsorption tower body 3 is provided with a lifting lug and a barometer, the barometer being used to monitor the air pressure inside the adsorption tower body 3.

[0047] Lifting lugs are fixedly welded or integrally cast onto the outer wall of the adsorption tower body. They are usually symmetrically arranged in the upper or middle part of the tower body to facilitate the use of lifting equipment (such as hooks, wire ropes, etc.) to provide a stable lifting fulcrum during the handling, installation, maintenance or replacement of the adsorption tower, ensuring that the equipment is safely and efficiently positioned.

[0048] The barometer is a mechanical or electronic pressure monitoring device. Its measuring end is connected to the inside of the adsorption tower body 3 through a pressure sampling tube or interface, and is used to monitor the pressure changes inside the adsorption tower in real time.

[0049] As an optional implementation, the inner wall of the adsorption tower body 3 is provided with a wear-resistant lining.

[0050] The wear-resistant lining covers the inner surface of the adsorption tower body 3, and is preferably set in the lower part of the air inlet and the main impact area of ​​the airflow. These areas are subjected to repeated impacts from high-speed gas and fine particles all year round, and are high-risk parts for wear and structural fatigue of the adsorption tower.

[0051] As an optional implementation, the adsorption tower body 3 is provided with an exhaust port, which is connected to a safety valve.

[0052] The exhaust port is preferably located at the top of the adsorption tower body 3 and is connected to the gas space inside the adsorption tower. When the internal pressure of the adsorption tower exceeds the set safety threshold, the safety valve automatically opens, releasing the gas inside the tower to the atmosphere or guiding it to the emission system, thereby reducing the pressure inside the tower to a safe range.

[0053] As an optional implementation, the intake manifold 2 and the production manifold 1 are each equipped with a control valve 5.

[0054] Control valves 5 are installed on the main inlet pipe 2 and the main gas production pipe 1 respectively to regulate the on / off state and flow rate of the gas, so as to realize the automatic switching control of each stage of the PSA system such as adsorption, desorption, and backflushing.

[0055] As an optional implementation, the bottom of the adsorption tower body 3 is provided with a support base 4.

[0056] The support base 4 is located at the lower end of the adsorption tower body 3. It is usually connected to the tower body by welding or integral casting. The shape of the support base 4 can be designed according to the diameter of the adsorption tower and the operating load.

[0057] The above technical solution has the following beneficial effects: Through the three-stage gas distribution structure of "inlet main pipe - gas distribution pipe - mine screen pipe", combined with the precise matching of the flow area parameters of the mine screen pipe, the inlet airflow is fully diffused and slowed down before entering the adsorbent bed, effectively reducing the direct impact of local high-pressure airflow on the adsorbent and reducing pulverization and particle breakage; by using multiple mine screen pipes evenly distributed and buried inside the bed, combined with the adjustable gas distribution pipeline layout, the gas distribution at the bottom and middle of the adsorption tower is more uniform, avoiding the problems of "flow deviation" or "airflow dead zone", thereby improving adsorption efficiency and bed utilization; by establishing a mathematical model between the mine screen pipe parameters and the total flow area, the engineering design and quantitative control of the adsorption tower pneumatic system are realized, which facilitates modular development and mass promotion.

[0058] The above-described specific embodiments of the utility model further illustrate the purpose, technical solution, and beneficial effects of the utility model. It should be understood that the above content is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the scope of protection of the utility model.

Claims

1. An adsorption tower resistant to adsorbent pulverization, characterized in that, include: The adsorption tower body, the main gas production pipeline, and the main gas inlet pipeline; The gas inlet of the main gas production pipeline is located inside the top side of the adsorption tower body, and the gas outlet is located outside the adsorption tower body. The air inlet end of the main air inlet pipe is located inside the bottom side of the adsorption tower body, and the air outlet end is located outside the adsorption tower body. Both the main intake pipe and the main production pipe include the following structures: The main pipeline, at least two branch gas pipelines connected to the main pipeline, and at least two mine screen pipes connected to each branch gas pipeline, wherein the mine screen pipes are buried in the adsorbent bed; The parameters of the mining screen tube must satisfy the following formula: S = (K × π × B × D × L) / (A + B); Where S is the flow area of ​​a single mining screen tube; A is the width of the screen bar of the mining screen tube; B is the gap width of the mining screen tube; K is the effective flow area coefficient; D is the outer diameter of the mining screen tube; and L is the length of the flow section of the screen tube.

2. The adsorption tower against adsorbent pulverization according to claim 1, characterized in that, The flow area of ​​the mine screen pipe is calculated using the following formula: Vx = YS; Where Vx is the cross-sectional area of ​​the gas distribution pipeline corresponding to the mine screen pipe; Y is the number of mine screen pipes.

3. The adsorption tower with anti-adsorbent pulverization as described in claim 1, characterized in that: The effective circulation area coefficient K ranges from 0.8 to 0.

9.

4. The adsorption tower with anti-adsorbent pulverization as described in claim 1, characterized in that: The screen bars have a width of 1.4-1.6 mm and a length of 1.9-2.0 mm; The gap width is 0.3 times the average particle size of the adsorbent.

5. The adsorption tower with anti-adsorbent pulverization as described in claim 1, characterized in that: The adsorption tower body is equipped with a coconut fiber mat inside. The coconut fiber mat is located on the top side of the main gas production pipeline and is pressed tightly onto the top of the adsorption tower body by a cap.

6. The adsorption tower against adsorbent pulverization according to claim 1, characterized in that: The adsorption tower body is equipped with lifting lugs and a barometer on its outer side. The barometer is used to monitor the air pressure inside the adsorption tower body.

7. The adsorption tower with anti-adsorbent pulverization as described in claim 1, characterized in that: The inner wall of the adsorption tower body is provided with a wear-resistant lining.

8. The adsorption tower against adsorbent pulverization according to claim 1, characterized in that: The adsorption tower body is provided with an exhaust port, which is connected to a safety valve.

9. The adsorption tower against adsorbent pulverization according to claim 1, characterized in that: The main intake pipe and the main production pipe are each equipped with a control valve.

10. The adsorption tower against adsorbent pulverization according to claim 1, characterized in that: The bottom of the adsorption tower body is provided with a support base.

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