A composite adsorption tower for oxygen-enriched air purification

Abstract

The utility model belongs to the field of oxygen -enriched air purification equipment, concretely relates to a composite adsorption tower for oxygen -enriched air purification, in view of the problems in the prior art, provide a kind of composite adsorption tower for oxygen -enriched air purification, the inside of adsorption tower is sequentially fixedly connected with first adsorption layer, second adsorption layer and third adsorption layer from below to above, first adsorption layer, second adsorption layer and third adsorption layer are respectively provided with airflow distributor, the surface of adsorption tower is provided with one spiral heat pipe that spiral winding is in the surface of adsorption tower;The device can be used to absorb the various impurities in the airflow in the process of airflow circulation by the adsorption material in the multilayer adsorption layer, and under the synergistic assistance of spiral heat pipe heat preservation and heat conduction, the simultaneous efficient removal of multiple impurities is realized, without separately setting multiple adsorption equipment;And adopt airflow even distribution pulse type spouting method, both improve adsorption efficiency and reduce regeneration energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of oxygen-enriched air purification equipment, specifically relating to a composite adsorption tower for oxygen-enriched air purification. Background Technology

[0002] In the industrial production field, oxygen-enriched air is an important industrial feedstock gas, widely used in high-tech fields such as cryogenic separation to produce high-purity oxygen, fuel cells, and aerospace. These applications have extremely stringent requirements for the impurity content in the oxygen-enriched air. For example, in cryogenic separation processes, the moisture content of the feedstock gas needs to be controlled at ≤0.5ppm, carbon dioxide at ≤1ppm, and hydrocarbons at ≤0.1ppm. If the impurity content exceeds the standard, it can easily lead to equipment freezing, catalyst poisoning, or safety risks. Therefore, deep purification of oxygen-enriched air is a key step to ensure the stable operation of subsequent processes. Currently, technologies for the simultaneous purification of multiple impurities in oxygen-enriched air mainly rely on single adsorption towers or multi-tower series processes. Single adsorption towers typically use a single type of adsorbent. Although the structure is simple, it is limited by the selectivity of the adsorbent and cannot simultaneously and efficiently remove impurities with large differences in properties, such as moisture, carbon dioxide, and hydrocarbons. Furthermore, the mass transfer efficiency of the adsorbent decreases due to compaction during long-term use, and competitive adsorption of impurities is prone to occur, resulting in insufficient purification precision and failing to meet the requirements of high-end application scenarios. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides a composite adsorption tower for oxygen-enriched air purification, which effectively solves the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: A composite adsorption tower for oxygen-enriched air purification includes an adsorption tower and a heat transfer oil circulation pump. The adsorption tower has an open structure at both the top and bottom. The interior of the adsorption tower is fixedly connected from bottom to top with a first adsorption layer, a second adsorption layer and a third adsorption layer. An airflow distributor is provided between the first adsorption layer, the second adsorption layer and the third adsorption layer. The surface of the airflow distributor is provided with a flow diversion hole. The airflow distributor is fixedly connected to the inner wall of the adsorption tower. The surface of the adsorption tower is provided with a spiral heat-conducting pipe that is spirally wound around the surface of the adsorption tower. The two ends of the spiral heat-conducting pipe are fixedly connected to the inlet and outlet of the heat transfer oil circulation pump, respectively. The spiral spacing of the spiral heat-conducting pipe gradually increases from bottom to top.

[0005] Preferably, an insulation shell is fixedly connected to the surface of the adsorption tower, and an insulation layer is fixedly connected to the circumferential surface of the insulation shell.

[0006] Preferably, the upper end of the adsorption tower is provided with connecting covers at both ends, and the connecting covers are integral with the adsorption tower; the circumferential surfaces of the two corresponding connecting covers are arranged in corresponding conical structures, and the outer ends of the conical structures are respectively provided with openings.

[0007] Preferably, each of the diversion holes is fixedly connected to a pulse generator, which can generate a pulsating impact when the airflow is ejected through the pulse generator.

[0008] Preferably, the pulse generator includes a mounting cylinder with openings at the top and bottom. A sliding groove is coaxially formed inside the mounting cylinder. A piston rod capable of axial movement is slidably connected to the inner side of the sliding groove. Sealing pins capable of blocking the openings of the mounting cylinder are fixedly connected to the upper and lower ends of the piston rod. The side edges of the upper and lower ends of the piston rod are respectively provided with inclined surfaces facing inward. Multiple venting grooves distributed in a ring are formed along the axial direction inside the mounting cylinder. A first vent hole and a second vent hole are respectively formed at both ends of the venting groove. The first vent hole and the second vent hole are located on the upper and lower sides of the inner wall of the venting groove and are connected to the venting groove.

[0009] Preferably, the piston rod is fixedly connected to support blocks at its upper and lower ends, and the diameter of the support blocks is larger than the diameter of the sealing pin.

[0010] Preferably, a support spring is fitted onto the surface of the sealing pin located on the upper side.

[0011] This utility model has a novel structure, ingenious design, and is simple and convenient to operate. Compared with the prior art, it has the following advantages: When in use, this device can adsorb various impurities in the airflow through the adsorption materials in the multi-layer adsorption layer during the airflow process. With the synergistic assistance of the spiral heat conduction tube for heat insulation, it can achieve simultaneous and efficient removal of multiple impurities without the need to set up multiple adsorption devices separately. Moreover, the use of a pulse jet method with uniform airflow distribution can improve adsorption efficiency and reduce regeneration energy consumption. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a composite adsorption tower for oxygen-enriched air purification according to the present invention.

[0013] Figure 2 This is a schematic diagram of the spiral heat-conducting pipe installation structure of a composite adsorption tower for oxygen-enriched air purification according to the present invention.

[0014] Figure 3 This is a cross-sectional schematic diagram of the internal structure of a composite adsorption tower for oxygen-enriched air purification according to the present invention.

[0015] Figure 4 This is a schematic diagram of the pulse generator installation structure of a composite adsorption tower for oxygen-enriched air purification according to the present invention.

[0016] Figure 5 This is a cross-sectional schematic diagram of the internal structure of the pulse generator in a composite adsorption tower for oxygen-enriched air purification according to this utility model.

[0017] Figure 6 This is a cross-sectional view of the installation cylinder structure of a composite adsorption tower for oxygen-enriched air purification according to this utility model.

[0018] In the diagram: 1-Adsorption tower, 2-Insulation shell, 3-Insulation layer, 4-Spiral heat conduction pipe, 5-Heat transfer oil circulation pump, 6-First adsorption layer, 7-Second adsorption layer, 8-Third adsorption layer, 9-Airflow distributor, 10-Mounting cylinder, 11-Piston column, 12-Support block, 13-Sealing pin, 14-Ventilation groove, 15-Support spring, 16-First air outlet, 17-Second air outlet, 18-Connecting cover. Detailed Implementation

[0019] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1-6 As shown, this utility model provides a composite adsorption tower for oxygen-enriched air purification, including an adsorption tower 1 and a heat transfer oil circulation pump 5. The adsorption tower 1 has an open structure at both ends. Inside the adsorption tower 1, from bottom to top, a first adsorption layer 6, a second adsorption layer 7, and a third adsorption layer 8 are fixedly connected. The first adsorption layer 6 is a hydrocarbon purification zone, which is provided with mesoporous activated carbon. Hydrocarbons are adsorbed by the mesoporous activated carbon. The airflow moves upward into the second adsorption layer 7, which is a carbon dioxide adsorption zone. It is provided with a composite adsorbent, which captures carbon dioxide. Finally, the airflow moves upward into the third adsorption layer 8. The adsorption layer 8 is a dehydration zone, which contains a desiccant to adsorb moisture during the upward flow of air. An airflow distributor 9 is provided between the first adsorption layer 6, the second adsorption layer 7, and the third adsorption layer 8. The surface of the airflow distributor 9 is provided with diversion holes. The airflow distributor 9 is fixedly connected to the inner wall of the adsorption tower 1. Each time the airflow passes through an adsorption layer, it can be dispersed through the diversion holes of the airflow distributor 9 before passing through the adsorption layer, so that the airflow is evenly distributed on the surface of the adsorption layer and adsorbed by the adsorption layer. This allows the first adsorption layer 6, the second adsorption layer 7, and the third adsorption layer 8 to evenly and fully absorb the impurities contained in the airflow. A spiral heat-conducting pipe 4 is spirally wound around the surface of the adsorption tower 1. Heat-conducting oil is placed inside the spiral heat-conducting pipe 4. Both ends of the spiral heat-conducting pipe 4 are fixedly connected to the inlet and outlet of a heat-conducting oil circulation pump 5, respectively. The heat-conducting oil inside the spiral heat-conducting pipe 4 is circulated by the heat-conducting oil circulation pump 5 to maintain the heat of the adsorption tower 1. The spiral spacing of the spiral heat-conducting pipe 4 gradually increases from bottom to top, causing the temperature inside the adsorption tower 1 to decrease from bottom to top under the circulation of the heat-conducting oil inside the spiral heat-conducting pipe 4. The spiral heat-conducting pipes 4 are most densely packed at the bottom of the adsorption tower 1, resulting in the highest temperature at the bottom of the adsorption tower 1. The temperature gradually decreases upwards, with the lowest temperature at the bottom layer, allowing the airflow to completely remove hydrocarbons. The middle layer has a moderate temperature, helping to remove carbon dioxide, and the upper layer has the lowest relative temperature, used only for removing moisture.

[0021] An insulation shell 2 is fixedly connected to the surface of the adsorption tower 1 to protect the spiral heat conduction pipe 4, and an insulation layer 3 is fixedly connected to the circumferential surface of the insulation shell 2 to achieve the insulation effect.

[0022] The upper ends of the adsorption tower 1 are respectively provided with connecting covers 18, and the connecting covers 18 are integral with the adsorption tower 1; for example Figure 2 and Figure 3 As shown, the circumferential surfaces of the two corresponding connecting covers 18 are arranged in corresponding conical structures. The outer ends of the conical structures are respectively provided with openings for air intake and air exhaust. The connecting cover 18 of the lower conical structure can extend upward to the first adsorption layer 6 on the lower side, and the filtered airflow can be easily collected and discharged through the upper conical structure.

[0023] Furthermore, each of the diversion holes is fixedly connected to a pulser. When the airflow passes through the pulser, it can generate a pulsating impact. During the process of the gas ejected by the pulser impacting the first adsorption layer 6, the second adsorption layer 7, and the third adsorption layer 8, it can impact the adsorbents inside the first adsorption layer 6, the second adsorption layer 7, and the third adsorption layer 8, such as mesoporous activated carbon and composite adsorbents, causing them to vibrate slightly. This prevents the adsorbent particles from being compacted and reducing the mass transfer efficiency.

[0024] Furthermore, such as Figure 5 and Figure 6As shown, the pulse generator includes a mounting cylinder 10 with upper and lower openings. A sliding groove is coaxially formed inside the mounting cylinder 10. A piston rod 11 that can move axially is slidably connected to the inner side of the sliding groove. Sealing pins 13 that can block the openings of the mounting cylinder 10 are fixedly connected to the upper and lower ends of the piston rod 11. When the piston rod 11 moves up and down, the openings at the upper and lower ends of the mounting cylinder 10 can be blocked by the sealing pins 13. By controlling the opening and closing of the openings at the upper and lower ends of the mounting cylinder 10, the air intake is controlled. The side edges of the upper and lower ends of the piston rod 11 are respectively provided with inclined surfaces that form an airflow pressure space between the inclined surfaces and the inner wall of the sliding groove. The interior of the mounting cylinder 10 has multiple annularly distributed venting grooves 14 arranged along the axial direction. A first vent 16 and a second vent 17 are respectively located at the upper and lower sides of the inner wall of the venting groove 14 and are connected to it. When airflow enters through the lower opening of the mounting cylinder 10, it pushes the piston rod 11 upwards, causing the sealing pin 13 above the piston rod 11 to block the upper opening of the mounting cylinder 10. The airflow then enters the venting groove 14 through the second vent 17 and into the space formed between the inclined structure and the sliding groove at the upper end of the piston rod 11, continuously applying air pressure. During the airflow process, the space formed between the inclined structure and the sliding groove at the upper end of the piston rod 11... As the air pressure in the pressurized space gradually increases, when the air pressure inside the space exceeds the pressure of the incoming airflow, it can push the piston rod 11 to overcome the air pressure from below, causing the piston rod 11 to move downwards. This disengages the sealing pin 13 at the upper end of the piston rod 11 from the opening at the upper end of the mounting cylinder 10, allowing the airflow to be ejected through the opening at the upper end of the mounting cylinder 10. When the air pressure at the upper end of the piston rod 11 weakens due to the ejected airflow, the surging airflow from below can push the piston rod 11 upwards again. This process is repeated until the air pressure above the piston rod 11 exceeds the air pressure below again, causing the piston rod 11 to move downwards again. As the airflow continues to flow, the piston rod 11 moves up and down repeatedly, creating an intermittent upward ejection of airflow and a pulsating ejection effect. Furthermore, support blocks 12 are fixedly connected to the upper and lower ends of the piston rod 11, respectively. The diameter of the support blocks 12 is larger than the diameter of the sealing pin 13, such as... Figure 5As shown, when the upper and lower openings of the mounting cylinder 10 are closed by the sealing pin 13 under the obstruction of the support block 12, a certain storage space can be reserved at the upper and lower ends of the piston column 11 and the sliding groove. The storage space formed is the airflow pressurization space, thereby increasing the atmospheric pressure. This allows the airflow to overcome the air pressure from the airflow below the piston column 11 more quickly during continuous flow, thereby improving the sensitivity of the piston column 11 when moving up and down. Furthermore, the sealing pin 13 on the upper side is fitted with support springs 15. The support springs 15 can support the piston column 11 and prevent the piston column 11 from moving up and down arbitrarily when shaken. When the airflow passes through the pulser, the pressure generated can overcome the elasticity of the support springs 15 and move upward, without affecting the piston column 11's up and down reciprocating movement under the action of the airflow, thus effectively ensuring the effect of the pulser.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A composite adsorption tower for oxygen-enriched air purification, comprising an adsorption tower (1) and a heat transfer oil circulation pump (5), characterized in that: The adsorption tower (1) has an open structure at both the top and bottom. The adsorption tower (1) is fixedly connected from bottom to top with a first adsorption layer (6), a second adsorption layer (7) and a third adsorption layer (8). An airflow distributor (9) is provided between the first adsorption layer (6), the second adsorption layer (7) and the third adsorption layer (8). The surface of the airflow distributor (9) is provided with a flow divider hole. The airflow distributor (9) is fixedly connected to the inner wall of the adsorption tower (1). A spiral heat-conducting pipe (4) is spirally wound around the surface of the adsorption tower (1). The two ends of the spiral heat-conducting pipe (4) are fixedly connected to the inlet and outlet of the heat transfer oil circulation pump (5), respectively. The spiral spacing of the spiral heat-conducting pipe (4) gradually increases from bottom to top.

2. The composite adsorption tower for oxygen-enriched air purification as described in claim 1, characterized in that: The surface of the adsorption tower (1) is fixedly connected to an insulation shell (2), and a layer of insulation (3) is fixedly connected to the circumferential surface of the insulation shell (2).

3. The composite adsorption tower for oxygen-enriched air purification as described in claim 1, characterized in that: The adsorption tower (1) is provided with connecting covers (18) at both ends of the upper end. The connecting covers (18) and the adsorption tower (1) are integrated into one structure. The circumferential surfaces of the two corresponding connecting covers (18) are arranged in a conical structure, and the outer ends of the conical structures are respectively provided with openings.

4. The composite adsorption tower for oxygen-enriched air purification as described in claim 1, characterized in that: Each of the diversion holes is fixedly connected to a pulse generator, which can generate a pulsating impact when the airflow is ejected through the pulse generator.

5. The composite adsorption tower for oxygen-enriched air purification as described in claim 4, characterized in that: The pulse generator includes a mounting cylinder (10) with openings at the top and bottom. A sliding groove is coaxially provided inside the mounting cylinder (10). A piston rod (11) capable of axial movement is slidably connected to the inner side of the sliding groove. Sealing pins (13) capable of blocking the openings of the mounting cylinder (10) are fixedly connected to the upper and lower ends of the piston rod (11). The side edges of the upper and lower ends of the piston rod (11) are respectively provided with inclined surfaces facing inward. Multiple venting grooves (14) are provided in the mounting cylinder (10) along the axial direction. A first vent hole (16) and a second vent hole (17) are provided at both ends of the venting groove (14). The first vent hole (16) and the second vent hole (17) are located on the upper and lower sides of the inner wall of the venting groove (14) and are connected to the venting groove (14).

6. The composite adsorption tower for oxygen-enriched air purification as described in claim 5, characterized in that: The piston rod (11) is fixedly connected to the upper and lower ends of the piston rod (12), and the diameter of the support block (12) is larger than the diameter of the sealing pin (13).

7. A composite adsorption tower for oxygen-enriched air purification as described in claim 5, characterized in that: Support springs (15) are respectively fitted on the surface of the sealing pin (13) located on the upper side.

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