Multistage diffusion structure for protecting molecular sieve
By designing a multi-stage diffusion structure, changing the airflow direction, and performing multiple deceleration diffusions, the problem of poor diffusion effect in existing gas separation equipment is solved, thereby improving the protective effect of molecular sieves and the service life of the equipment.
Patent Information
- Application Number
- CN202423163509.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing gas separation equipment uses a diffusion structure at the bottom of the adsorption tower, which has limited effect on gas diffusion and cannot effectively protect the molecular sieve, thus affecting separation efficiency and equipment lifespan.
A multi-stage diffusion structure is designed, including a head, a nozzle, a baffle, and a perforated plate. The airflow direction is changed by a special air inlet pipe structure, so that the airflow impacts the head and diffuses upward. The airflow is then decelerated and diffused multiple times through the upper and side diffusion holes and the perforated plate, thus achieving buffering and diffusion of the airflow.
It improves gas diffusion, reduces the impact force of molecular sieves, and extends the service life of equipment.
Smart Images
Figure CN223697263U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of diffusion structure for gas separation equipment, specifically, it is a multistage diffusion structure for protecting molecular sieve. BACKGROUND
[0002] The gas separation equipment refers to the equipment for liquefying, rectifying and finally separating gas into oxygen, nitrogen and other useful gas, and the gas separation equipment is a complete set of equipment composed of various machines and equipment, and the widely used ones include nitrogen making equipment and oxygen making equipment. The existing nitrogen making equipment and oxygen making equipment usually adopt PSA molecular sieve adsorption method, which has the characteristics of simple process flow, high automation degree, fast gas production (15-30 minutes), low energy consumption and high product purity, and is widely used in the technical field of large and medium-sized industrial gas separation equipment.
[0003] In the PSA molecular sieve adsorption method gas separation equipment, double-tower or multi-tower pressure equalization structure is mostly adopted; the adsorption tower as an important component has an important influence on separation efficiency, separation gas purity and equipment service life. The bottom of the existing adsorption tower is mostly one-stage or two-stage diffusion structure, which has limited effect on gas diffusion and cannot play a good molecular sieve protection role. Therefore, the bottom diffusion structure of the existing adsorption tower of the gas separation equipment needs to be further improved. UTILITY MODEL CONTENT
[0004] The utility model aims at overcoming the deficiencies in the prior art, providing a multistage diffusion structure for protecting molecular sieve, which has the characteristics of compact structure, good diffusion effect, small impact force on molecular sieve and the like, and can be widely applied to the production technical field of the adsorption tower of the gas separation equipment.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multistage diffusion structure for protecting molecular sieve, comprising a head, the bottom of the head is provided with a connecting pipe, the bottom of the connecting pipe is provided with a sealing plate; the side surface of the connecting pipe is provided with a gas inlet pipe, the front end of the gas inlet pipe is provided with a flange joint, the top of the flange joint is provided with a gas inlet; the inside of the head is provided with a baffle, the baffle is fixedly connected with the connecting pipe, the top of the connecting pipe is provided with an upper diffusion hole, and the side surface is provided with a side diffusion hole; the upper end of the head is further provided with a perforated plate.
[0006] As an improvement, the cross section of the head faces upward and is an elliptical structure.
[0007] As an improvement, the connecting pipe is a cylindrical hollow structure, and the upper end is embedded in the inside of the head.
[0008] As an improvement, the inside of the connecting pipe is provided with a flow blocking block at the upper end.
[0009] As an improvement, the baffle block is provided with 3-5 rows and is distributed equidistantly inside the connecting pipe.
[0010] As an improvement, the tail of the air inlet pipe is arc-shaped structure, and the air outlet hole is downward, so that the air flow direction can be changed, the air flow impacts the sealing plate downward, and then the air flow is diffused upward.
[0011] As an improvement, the baffle is an oval flat plate with a thickness of 10-25mm.
[0012] As an improvement, the upper diffusion hole is an integral plane diffusion hole and is uniformly distributed on the top of the connecting pipe.
[0013] As an improvement, the side diffusion hole is above the baffle and has a height of 50-150mm.
[0014] As an improvement, the hole plate is uniformly provided with circular through holes with a diameter of φ1-φ10mm, and the hole plate is fixedly connected with the inner wall side of the sealing head by welding.
[0015] As an improvement, the hole plate is provided with a wire mesh, and the wire mesh has a mesh size of 30-80.
[0016] The multi-stage diffusion structure for protecting molecular sieve has the characteristics of compact structure, good diffusion effect, small impact force on molecular sieve and the like, the tail of the air inlet pipe is specially provided as arc-shaped structure, the air outlet hole is downward, so that the air flow direction can be changed, the air flow impacts the sealing plate downward, and then the air flow is diffused upward, the entering air flow is effectively buffered and decelerated, the upper diffusion hole and the side diffusion hole are arranged on the upper end and the side of the connecting pipe respectively, the air diffusion area is increased, the air diffusion range is larger, secondary deceleration diffusion is realized, in addition, the hole plate is arranged on the uppermost end of the sealing head, the air flow is further diffused, tertiary deceleration diffusion is realized, so that the impact force on the molecular sieve is effectively reduced, and the service life of the molecular sieve is prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a structural schematic view of the multi-stage diffusion structure for protecting molecular sieve.
[0018] In the figure: 1, sealing head; 2, connecting pipe; 3, sealing plate; 4, air inlet pipe; 5, flange joint; 6, air inlet; 7, baffle; 8, upper diffusion hole; 9, side diffusion hole; 10, hole plate; 11, baffle block. DETAILED DESCRIPTION
[0019] The utility model will be described in further detail in combination with the drawings and embodiments: as Figure 1The utility model discloses a multistage diffusion structure for protecting molecular sieve, including the head 1, the bottom of head 1 is equipped with the connecting pipe 2, the bottom of connecting pipe 2 is equipped with the sealing plate 3, the side of connecting pipe 2 is equipped with the air inlet pipe 4, the front end of air inlet pipe 4 is equipped with the flange joint 5, the top of flange joint 5 is equipped with the air inlet 6, the inside of head 1 is equipped with the baffle 7, the baffle 7 with connecting pipe 2 fixed connection, the top of connecting pipe 2 is equipped with the upper diffusion hole 8, and the side is equipped with the side diffusion hole 9, the upper end of head 1 still is equipped with the hole plate 10.
[0020] Further, the head 1 section is upward and is elliptical structure, specifically, the head 1 is the lower head of adsorption tower cylinder body, can be sealedly connected with adsorption tower cylinder body by welding into integral structure.
[0021] Further, the connecting pipe 2 is cylindrical hollow structure, and the upper end is embedded in the inside of the head 1, specifically, the inside upper end of the connecting pipe 2 is equipped with the flow block 11 for blocking and shunting the airflow entering the connecting pipe, more specifically, the flow block 11 is equipped with 3-5 rows, and is equally spaced in the inside of the connecting pipe 1, so that the entering airflow is shunted sufficiently and the speed is reduced uniformly.
[0022] Further, the tail of the air inlet pipe 4 is arc structure, and the air outlet hole direction is downward, so that the airflow direction can be changed, the airflow is impacted downward on the sealing plate 3, and then the airflow is diffused from bottom to top, so that the airflow is reduced in speed.
[0023] Further, the baffle 7 is elliptical flat plate, and the thickness is 10-25mm, specifically, the baffle is completely sealedly connected with the inner wall of the head 1 by welding, and the relatively thick thickness can prevent welding deformation, prevent the airflow from overflowing downward from the upper end of the baffle 7, and avoid gas flow loss.
[0024] Further, the upper diffusion hole 8 is integral plane diffusion hole, and is evenly distributed on the top of the connecting pipe 2, specifically, the airflow is diffused and reduced in speed through the upper diffusion hole 8.
[0025] Further, the side diffusion hole 9 is above the baffle 7, and the height is 50-150mm, preferably 100-120mm, the airflow dispersion amount is increased through the side diffusion hole 9, so that the airflow diffusion range is larger, and the molecular sieve in the adsorption tower has sufficient gas source for adsorption and gas production.
[0026] Further, the hole plate 10 is uniformly distributed with circular through holes with a diameter of φ1-φ10mm, preferably φ3-5mm, and the hole plate 10 is fixedly connected with the inner wall side of the head 1 by welding, specifically, the diameter and number of the holes of the hole plate 10 can be precisely calculated according to the flow rate and flow size of the controlled gas, more specifically, the hole plate 10 is provided with a wire mesh with a mesh size of 30-80 meshes, thereby ensuring the best throttling dispersion effect.
[0027] The multi-stage diffusion structure for protecting molecular sieve has the characteristics of compact structure, good diffusion effect, small impact force on molecular sieve, etc., and its working principle is as follows: a high-speed airflow is generated by a compressor or an air pump, the airflow enters the inlet pipe 4 through the air inlet 6, then passes through the special structure of the inlet pipe 4 with the air outlet hole direction downward, changes the airflow direction, makes the airflow impact the sealing plate 3 downward, then makes the airflow diffuse from bottom to top into the connecting pipe 2, the airflow is dispersed by the flow block 11 inside the connecting pipe 2, and is discharged into the head 1 through the upper diffusion hole 8 and the side diffusion hole 9, respectively, then is dispersed and decelerated into the adsorption tower through the hole plate 10 on the upper end of the head 1, and is exchanged and adsorbed with the molecular sieve inside the adsorption tower, thereby producing qualified finished product gas.
[0028] Finally, it should be noted that the above enumeration is only a specific embodiment of the present application. Obviously, the present application is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or inferred from the content disclosed in the present application by those of ordinary skill in the art should be considered as falling within the scope of protection of the present application.
Claims
1. A multi-level diffusion structure for protecting molecular sieves, comprising a head (1), characterized in that, The end cap (1) is provided with a connecting pipe (2) at the bottom, and a sealing plate (3) is provided at the bottom of the connecting pipe (2); an air inlet pipe (4) is provided on the side of the connecting pipe (2), a flange joint (5) is provided at the front end of the air inlet pipe (4), and an air inlet (6) is provided at the top of the flange joint (5); a baffle (7) is provided inside the end cap (1), and the baffle (7) is fixedly connected to the connecting pipe (2); an upper diffuser hole (8) is provided at the top of the connecting pipe (2), and a side diffuser hole (9) is provided on the side; a perforated plate (10) is also provided at the upper end of the end cap (1).
2. The multi-level diffusion structure for protecting molecular sieves according to claim 1, characterized in that, The end cap (1) has an upward-facing cross-section and is an elliptical structure.
3. The multi-level diffusion structure for protecting molecular sieves according to claim 1, characterized in that, The connecting pipe (2) is a cylindrical hollow structure, and its upper end is embedded inside the end cap (1).
4. The multi-level diffusion structure for protecting molecular sieves according to claim 3, characterized in that, The upper part of the inside of the pipe (2) is provided with a baffle block (11).
5. The multi-level diffusion structure for protecting molecular sieves according to claim 4, characterized in that, The flow-blocking blocks (11) are arranged in 3 to 5 rows, and are evenly distributed inside the pipe (2).
6. The multi-level diffusion structure for protecting molecular sieves according to claim 1, characterized in that, The tail of the air inlet pipe (4) is an arc-shaped structure and the air outlet faces downward, which can change the airflow direction so that the airflow hits the sealing plate (3) downward and then diffuses from bottom to top.
7. The multi-level diffusion structure for protecting molecular sieves according to claim 1, characterized in that, The baffle (7) is an elliptical flat plate with a thickness of 10~25mm.
8. The multi-level diffusion structure for protecting molecular sieves according to claim 1, characterized in that, The upper diffusion hole (8) is an integral planar diffusion hole, and is evenly distributed on the top of the connector (2).
9. The multi-level diffusion structure for protecting molecular sieves according to claim 1, characterized in that, The side diffuser hole (9) is located above the baffle (7) and has a height of 50~150mm.
10. The multi-level diffusion structure for protecting molecular sieves according to claim 1, characterized in that, The perforated plate (10) has evenly distributed circular through holes with a diameter of φ1~φ10mm, and the perforated plate (10) is fixedly connected to the inner wall side of the end cap (1) by welding; the surface of the perforated plate (10) is also provided with a wire mesh with a mesh size of 30~80 mesh.