A pressure swing adsorption tower with gas uniform distribution filtering mechanism

Abstract

The present invention relates to the technical field of pressure swing adsorption towers, and specifically discloses a pressure swing adsorption tower with a gas uniformly distributed filtering mechanism, including a tower body, wherein a bottom cover is provided at the bottom end of the tower body, and a top cover is provided at the top end of the tower body; a filter separation assembly, wherein three of the filter separation assemblies are installed on the inner wall of the tower body, an adsorbent is provided between two adjacent filter separation assemblies, and a reinforcement structure is provided inside the filter separation assembly; a diverter cylinder, wherein a plurality of the diverter cylinders are distributed in an array, and the diverter cylinder is located between two adjacent filter separation assemblies and inserted into the adsorbent. The present invention replaces the conventional point-to-surface gas entry into the adsorbent, and has a three-dimensional space entry into the adsorbent, which slows down the pulverization or failure of the adsorbent near the air inlet, reduces the frequency of adsorbent replacement, reduces production costs, has a multi-point isobaric conveying structure for gas, and improves the effect of gas passing to the adsorbent.

Description

Technical Field

[0001] The invention relates to the technical field of pressure swing adsorption towers, and in particular to a pressure swing adsorption tower with a gas uniform distribution filtering mechanism. Background Art

[0002] Pressure swing adsorption tower is a kind of equipment that uses the difference in the adsorption capacity of adsorbents for gases under different pressures to achieve gas separation and purification. Its basic principle is to achieve adsorption and desorption processes by controlling the rise and fall of pressure. When pressurized, the adsorbent adsorbs certain components in the mixed gas, and when depressurized, the adsorbent releases these components, thereby achieving separation. Hydrogen purification uses multi-tower adsorption pressure swing adsorption technology, which is based on the physical adsorption of gas molecules on the surface of a specific adsorbent. It uses the characteristics of adsorbents that they easily adsorb high-boiling point components and are not easy to adsorb low-boiling point components at the same pressure, and the adsorption amount increases under high pressure and decreases under low pressure. The raw gas passes through the adsorption bed at a specific pressure, and the high-boiling point impurity components relative to hydrogen are selectively adsorbed, and the low-boiling point gas is not easily adsorbed and passes through the adsorption bed, thereby achieving the separation of hydrogen and impurity components. After the adsorption is completed, the adsorbent desorbs the adsorbed impurity components under reduced pressure conditions, so that the adsorbent is regenerated to adsorb and separate the impurities again. Since the adsorption and separation process in a single tower operation is intermittent, in order to operate continuously, two or more towers are usually used in the industry to adsorb and regenerate the adsorbent in the adsorption tower alternately.

[0003] During use of the existing pressure swing adsorption tower, the position of the adsorbent and the flow direction of the gas to be purified are fixed, so the adsorbent near the gas inlet is easily affected by impurities such as moisture and oil, resulting in powdering or failure, thereby affecting the separation effect and the long-term stable operation of the equipment, resulting in a high frequency of adsorbent replacement and high production costs. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a pressure swing adsorption tower with a gas uniform distribution filtering mechanism, which can solve the problems raised in the above background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A pressure swing adsorption tower with a gas uniform distribution filtering mechanism, comprising:

[0007] A tower body, wherein a tower bottom cover is arranged at the bottom end of the tower body, and a tower top cover is arranged at the top end of the tower body;

[0008] A filter partition assembly, wherein three of the filter partition assemblies are installed on the inner wall of the tower body, an adsorbent is arranged between two adjacent filter partition assemblies, and a reinforcement structure is arranged inside the filter partition assembly;

[0009] A shunt cylinder, wherein a plurality of the shunt cylinders are arranged in an array, the shunt cylinders are open toward the air inlet end and closed away from the air inlet end to form a top wall, the shunt cylinders are located between two adjacent filter partition components and inserted into the adsorbent, and the side walls of the shunt cylinders are provided with a plurality of drainage channels, and the drainage channels are used for exhaust;

[0010] An isobaric flow-limiting component, the isobaric flow-limiting component includes a plurality of circular plates and a limiting ring, the circular plates are fixedly mounted on the inner wall of the diverter tube, the limiting ring is fixedly mounted on the inner wall of the diverter tube, two adjacent circular plates cooperate with the diverter tube to form an exhaust chamber, a lifting plate is slidably mounted in the plurality of exhaust chambers of the diverter tube, the lifting plate is located between adjacent circular plates and the limiting ring, a spring is arranged on the top end of the lifting plate, a drainage tube is penetrated and fixedly mounted on the lifting plate, and the drainage tube is penetrated and slidably connected to the adjacent circular plates.

[0011] Preferably, the bottom end of the tower body is provided with three supporting legs through a tower bottom cover, and the top end of the tower top cover is provided with interconnected air outlets.

[0012] Preferably, a communicating air inlet is provided at the bottom end of the tower bottom cover, and the air inlet is connected to a high-pressure conveying component for conveying the gas to be purified.

[0013] Preferably, the filter separation assembly includes a support tube, which is fixedly mounted on the inner wall of the tower body, the inner wall of the support tube is provided with a rib ring, molecular sieves and flow equalizing plates are respectively provided on both sides of the rib ring, and the bottom end of the diversion tube is installed in the through hole of the flow equalizing plate.

[0014] Preferably, a plurality of fasteners are provided between the rib ring, the molecular sieve and the flow equalizing plate.

[0015] Preferably, the reinforcement structure includes a first support ring and a second support ring, the first support ring, the second support ring and the support tube are coaxially arranged, a plurality of first reinforcement ribs are arranged between the first support ring and the second support ring, and a plurality of second reinforcement ribs are arranged between the first support ring and the rib ring.

[0016] Preferably, the outer diameter of the second support ring is smaller than the inner diameter of the first support ring, and the outer diameter of the first support ring is smaller than the inner diameter of the rib ring.

[0017] Preferably, the plurality of exhaust chambers of the diverter tube along the direction from the open opening to the top wall are arranged in a linear array, and the number of the circumferential arrays of the guide channels in the plurality of exhaust chambers of the diverter tube along the direction from the open opening to the top wall is arranged in a decreasing manner.

[0018] Preferably, the inner wall of the exhaust chamber of the diverter tube is provided with two limiting columns, and the side wall of the lifting plate is provided with grooves matching the limiting columns.

[0019] Preferably, the top end of the spring is rotatably connected to the adjacent circular plate via a cylinder, and the original length of the spring is smaller than the length of the drainage channel.

[0020] The beneficial effects of the present invention are:

[0021] 1. By setting multiple groups of filter separation components and multiple diversion cylinders, the beneficial effect that can be obtained is that a tower bottom cover is set at the bottom end of the tower body, a tower top cover is set at the top of the tower body, a filter separation component, three filter separation components are installed on the inner wall of the tower body, an adsorbent is set between two adjacent filter separation components, a reinforcement structure is set in the filter separation component, multiple diversion cylinders are distributed in an array, the diversion cylinder is located between two adjacent filter separation components and inserted into the adsorbent, and the side wall of the diversion cylinder is provided with multiple drainage channels, and the drainage channels are used for exhaust;

[0022] The gas to be purified is transported into the tower body through a high-pressure transmission component, and the gas enters the bottom cover of the tower through the air inlet. After the molecular sieve near the bottom cover of the tower performs preliminary filtration on the gas, the gas flows into multiple diversion tubes after being equalized by a flow equalizing plate, and flows into the adsorbent gap through drainage channels in multiple exhaust chambers. The gas treated with the adsorbent is filtered by the molecular sieve located in the middle of the tower body, and then after being equalized by the flow equalizing plate, the gas enters the multiple diversion tubes located in the upper part of the tower body from multiple diversion tubes, and is filtered and discharged from the filter partition assembly near the top cover of the tower after being treated with the adsorbent. This replaces the conventional point-to-surface type of gas entering the adsorbent, and has a three-dimensional space type of gas entering the adsorbent, thereby improving the adsorption efficiency.

[0023] 2. By setting the diverter tube, the beneficial effect that can be obtained is that multiple diverter tubes are distributed in an array, the diverter tube is located between two adjacent filter partition components and inserted into the adsorbent, the side wall of the diverter tube is provided with multiple drainage channels, the drainage channels are used for exhaust, the multiple exhaust chambers of the diverter tube along the direction from the open mouth to the top wall are arranged in a linear array, and the number of the circumferential array of drainage channels in the multiple exhaust chambers of the diverter tube along the direction from the open mouth to the top wall is arranged in a decreasing manner;

[0024] Since the multiple exhaust chambers along the direction from the open port to the top wall of the diverter tube are arranged in a linear array, the number of circular arrays of diversion channels in the multiple exhaust chambers along the direction from the open port to the top wall of the diverter tube is arranged in a decreasing manner, the pulverization or failure of the adsorbent near the air inlet is slowed down, the frequency of adsorbent replacement is reduced, and the production cost is reduced.

[0025] 3. By setting an isobaric flow-limiting component, the beneficial effect that can be obtained is that the isobaric flow-limiting component includes a plurality of circular plates and a limiting ring, the circular plates are fixedly mounted on the inner wall of the diverter tube, the limiting ring is fixedly mounted on the inner wall of the diverter tube, two adjacent circular plates cooperate with the diverter tube to form an exhaust chamber, and a lifting plate is slidably mounted in the plurality of exhaust chambers of the diverter tube, the lifting plate is located between the adjacent circular plates and the limiting ring, a spring is arranged at the top of the lifting plate, a drainage tube is penetrated and fixedly mounted on the lifting plate, and the drainage tube is penetrated and slidably connected with the adjacent circular plates;

[0026] When the gas delivery pressure increases, multiple exhaust chambers are connected and the internal pressure increases synchronously. The lifting plate slides toward the top of the diversion tube due to the pressure difference, the spring is compressed, and the effective drainage length of the drainage channel increases, which has a multi-point isobaric delivery structure for the gas and improves the effect of the gas passing to the adsorbent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is the installation structure diagram of the tower body and the support pipe in the present invention;

[0030] Figure 3 It is the installation structure diagram of the reinforcement structure in the present invention;

[0031] Figure 4 An exploded view of the filter separation assembly of the present invention;

[0032] Figure 5 is a cross-sectional view of the tower body in the present invention;

[0033] Figure 6 The figure is a structural diagram of the installation of the flow dividing tube and the flow equalizing plate in the present invention;

[0034] Figure 7 It is an installation structure diagram of the isobaric current limiting component in the present invention;

[0035] Figure 8 The figure is a structural diagram of the installation of the spring and the lifting plate in the present invention;

[0036] Fig. 9 This is a diagram of the installation structure of the lifting plate and the drainage pipe in the present invention.

[0037] Description of reference numerals:

[0038] In the figure: 1. tower body; 11. tower bottom cover; 12. tower top cover; 13. support foot; 14. air inlet; 15. air outlet; 2. filter partition assembly; 21. support tube; 22. rib ring; 23. molecular sieve; 24. flow equalizing plate; 25. fastener; 31. first support ring; 32. second support ring; 33. first reinforcing rib; 34. second reinforcing rib; 4. diverter tube; 41. drainage channel; 51. round plate; 52. limiting ring; 53. lifting plate; 54. spring; 55. drainage tube; 56. limiting column. DETAILED DESCRIPTION

[0039] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0041] Reference Figure 1-Figure 9 , a pressure swing adsorption tower with a gas uniformly distributed filtering mechanism disclosed in the present invention, comprising a tower body 1, a tower bottom cover 11 is arranged at the bottom end of the tower body 1, a tower top cover 12 is arranged at the top end of the tower body 1, three supporting legs 13 are arranged at the bottom end of the tower body 1 through the tower bottom cover 11, a communicating air inlet 14 is arranged at the bottom end of the tower bottom cover 11, and the air inlet 14 is connected to a high-pressure conveying assembly for conveying the gas to be purified, and a communicating air outlet 15 is arranged at the top end of the tower top cover 12;

[0042] A filter separation assembly 2, wherein three filter separation assemblies 2 are installed on the inner wall of the tower body 1, an adsorbent is arranged between two adjacent filter separation assemblies 2, the filter separation assembly 2 comprises a support tube 21, the support tube 21 is fixedly installed on the inner wall of the tower body 1, a rib ring 22 is arranged on the inner wall of the support tube 21, a molecular sieve 23 and a flow equalizing plate 24 are arranged on both sides of the rib ring 22, a plurality of fasteners 25 are arranged between the rib ring 22, the molecular sieve 23 and the flow equalizing plate 24, a reinforcement structure is arranged in the filter separation assembly 2, the reinforcement structure comprises a first support ring 31 and a second support ring 32, the outer diameter of the second support ring 32 is smaller than the inner diameter of the first support ring 31, the outer diameter of the first support ring 31 is smaller than the inner diameter of the rib ring 22, the first support ring 31, the second support ring 32 and the support tube 21 are coaxially arranged, a plurality of first reinforcement ribs 33 are arranged between the first support ring 31 and the second support ring 32, and a plurality of second reinforcement ribs 34 are arranged between the first support ring 31 and the rib ring 22;

[0043] A plurality of diverter tubes 4 are arranged in an array, the diverter tube 4 is located between two adjacent filter partition components 2 and inserted into the adsorbent, the bottom end of the diverter tube 4 is installed in the through hole of the flow equalizing plate 24, and the side wall of the diverter tube 4 is provided with a plurality of drainage channels 41, and the drainage channels 41 are used for exhaust;

[0044] The isobaric flow-limiting component includes a plurality of circular plates 51 and a limiting ring 52. The circular plates 51 are fixedly mounted on the inner wall of the diverter tube 4. The limiting ring 52 is fixedly mounted on the inner wall of the diverter tube 4. Two adjacent circular plates 51 cooperate with the diverter tube 4 to form an exhaust chamber. The diverter tube 4 has a plurality of exhaust chambers arranged in a linear array along the direction from the open mouth to the top wall. The number of the circumferential array of the guide channels 41 in the plurality of exhaust chambers along the direction from the open mouth to the top wall of the diverter tube 4 is arranged in a decreasing manner. The plurality of exhaust chambers of the diverter tube 4 are all slidably mounted with lifting devices. The descending plate 53 and the lifting plate 53 are located between the adjacent circular plates 51 and the limiting rings 52. A spring 54 is arranged at the top end of the lifting plate 53. The top end of the spring 54 is rotatably connected to the adjacent circular plate 51 through a cylinder. The original length of the spring 54 is smaller than the length of the drainage channel 41. A drainage tube 55 is passed through and fixedly installed on the lifting plate 53. The drainage tube 55 is passed through and slidably connected to the adjacent circular plate 51. Two limiting columns 56 are arranged on the inner wall of the exhaust chamber of the diverter tube 4. The side wall of the lifting plate 53 is arranged with a groove matching the limiting column 56.

[0045] The working principle and use process of the present invention are as follows: the gas to be purified is transported into the tower body 1 through a high-pressure transport component, which includes a gas transport device (such as a blower, a compressor or a vacuum pump), a filter, a pressure regulating and controlling device and an automatic control system. The gas enters the tower bottom cover 11 through the air inlet 14. After the molecular sieve 23 near the tower bottom cover 11 performs preliminary filtration on the gas, the gas flows into a plurality of flow dividers 4 after being equalized by a flow equalizing plate 24, and flows into the adsorbent gap through a plurality of drainage channels 41 in the exhaust chamber. The gas treated by the adsorbent is filtered by the molecular sieve 23 located in the middle of the tower body 1, and then the gas enters a plurality of flow dividers located at the top of the tower body 1 from the plurality of flow dividers 4 after being equalized by a flow equalizing plate 24. The gas is filtered out from the filter partition assembly 2 near the tower top cover 12 after being treated with the adsorbent. Since the multiple exhaust chambers along the direction from the open mouth to the top wall of the diverter cylinder 4 are arranged in a linear array, the number of the circumferential array of the drainage channels 41 in the multiple exhaust chambers along the direction from the open mouth to the top wall of the diverter cylinder 4 is arranged in a decreasing manner, which slows down the pulverization or failure of the adsorbent near the air inlet 14, reduces the frequency of replacing the adsorbent, and reduces the production cost. At the same time, when the gas delivery pressure increases, the multiple exhaust chambers are connected and the internal pressure increases synchronously, the lifting plate 53 slides toward the top of the diverter cylinder 4 due to the pressure difference, the spring 54 is compressed, and the effective drainage length of the drainage channel 41 is increased, which has a multi-point isobaric delivery structure for the gas.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A pressure swing adsorption tower with a gas uniform distribution filtering mechanism, characterized in that: include: A tower body, wherein a tower bottom cover is arranged at the bottom end of the tower body, and a tower top cover is arranged at the top end of the tower body; A filter partition assembly, wherein three of the filter partition assemblies are installed on the inner wall of the tower body, an adsorbent is arranged between two adjacent filter partition assemblies, and a reinforcement structure is arranged inside the filter partition assembly; A shunt cylinder, wherein a plurality of the shunt cylinders are arranged in an array, the shunt cylinders are open toward the air inlet end and closed away from the air inlet end to form a top wall, the shunt cylinder is located between two adjacent filter partition components and inserted into the adsorbent, the bottom end of the shunt cylinder is installed in the through hole of the flow equalizing plate, and the side wall of the shunt cylinder is provided with a plurality of drainage channels, and the drainage channels are used for exhaust; An isobaric flow-limiting assembly, the isobaric flow-limiting assembly comprising a plurality of circular plates and a limiting ring, the circular plates being fixedly mounted on the inner wall of the flow-dividing cylinder, the limiting ring being fixedly mounted on the inner wall of the flow-dividing cylinder, two adjacent circular plates cooperating with the flow-dividing cylinder to form an exhaust chamber, a lifting plate being slidably mounted in the plurality of exhaust chambers of the flow-dividing cylinder, the lifting plate being located between adjacent circular plates and the limiting ring, a spring being arranged at the top end of the lifting plate, a drainage tube being penetrated and fixedly mounted on the lifting plate, and the drainage tube being penetrated and slidably connected with adjacent circular plates; The filtering and separating assembly comprises a supporting tube, the supporting tube is fixedly mounted on the inner wall of the tower body, the inner wall of the supporting tube is provided with a rib ring, and molecular sieves and flow equalizing plates are respectively provided on both sides of the rib ring; The plurality of exhaust chambers of the diverter tube along the direction from the opening to the top wall are arranged in a linear array, and the number of the circumferential arrays of the drainage channels in the plurality of exhaust chambers of the diverter tube along the direction from the opening to the top wall is arranged in a decreasing manner; The inner wall of the exhaust cavity of the diverter tube is provided with two limiting columns, and the side wall of the lifting plate is provided with grooves matching the limiting columns.

2. A pressure swing adsorption tower with a gas uniform distribution filtering mechanism according to claim 1, characterized in that: The bottom end of the tower body is provided with three supporting legs through a tower bottom cover, and the top end of the tower top cover is provided with interconnected air outlets.

3. A pressure swing adsorption tower with a gas uniform distribution filtering mechanism according to claim 1, characterized in that: The bottom end of the tower bottom cover is provided with a communicating air inlet, and the air inlet is connected to a high-pressure conveying component for conveying the gas to be purified.

4. A pressure swing adsorption tower with a gas uniform distribution filtering mechanism according to claim 1, characterized in that: A plurality of fasteners are arranged between the rib ring, the molecular sieve and the flow equalizing plate.

5. A pressure swing adsorption tower with a gas uniform distribution filtering mechanism according to claim 1, characterized in that: The reinforcement structure includes a first support ring and a second support ring. The first support ring, the second support ring and the support tube are coaxially arranged. A plurality of first reinforcement ribs are arranged between the first support ring and the second support ring. A plurality of second reinforcement ribs are arranged between the first support ring and the rib ring.

6. A pressure swing adsorption tower with a gas uniform distribution filtering mechanism according to claim 5, characterized in that: The outer diameter of the second support ring is smaller than the inner diameter of the first support ring, and the outer diameter of the first support ring is smaller than the inner diameter of the rib ring.

7. A pressure swing adsorption tower with a gas uniform distribution filtering mechanism according to claim 1, characterized in that: The top end of the spring is rotatably connected to the adjacent circular plate through a cylinder, and the original length of the spring is smaller than the length of the drainage channel.

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