Oxygen air separation efficient pressure swing adsorption device

Abstract

The utility model provides an oxygen air separation efficient pressure swing adsorption device, and relates to the field of air separation devices.The oxygen air separation efficient pressure swing adsorption device comprises an adsorption tower body, the adsorption tower body comprises a shell, a first molecular sieve, a second molecular sieve, a top sealing plate and a bottom sealing plate, the first molecular sieve and the second molecular sieve are both annularly arranged, a first through hole is externally connected with a first air outlet pipe, and a second through hole is externally connected with a second air outlet pipe; the first molecular sieve is used for carrying out air separation for the first time, the second molecular sieve is used for carrying out air separation for the second time, the pressure can be adjusted through the first variable-frequency pressure adjusting pump and the second variable-frequency pressure adjusting pump in the using process, and the air separation efficiency is improved. The rotating speed of the first variable-frequency pressure regulating pump and the second variable-frequency pressure regulating pump can be regulated according to requirements, so that the pressure intensity in the shell can be increased or decreased, and the pressure intensity in the first molecular sieve, between the first molecular sieve and the second molecular sieve and between the second molecular sieve and the shell can be increased or decreased.

Description

Technical Field

[0001] The present application relates to the field of air separation devices, and in particular to an oxygen air separation high-efficiency pressure swing adsorption device. Background Art

[0002] Molecular sieve adsorbers can efficiently purify air and have been widely used in air separation units in recent years. The function of molecular sieve adsorbers is to remove moisture, carbon dioxide, acetylene and other hydrocarbons from the air to ensure the safe operation of air separation equipment. In the adsorption purification cycle, when the molecular sieve is saturated with adsorption, it loses its adsorption capacity. At this time, the molecular sieve needs to be desorbed and regenerated to desorb the adsorbate from the adsorbent to restore the adsorption capacity of the molecular sieve and ensure the reuse of the molecular sieve adsorber. In the temperature variable adsorption molecular sieve adsorption purification device, the molecular sieve is generally adsorbed at room temperature and desorbed and regenerated at 200℃~320℃. The existing molecular sieve adsorber cannot adjust the pressure autonomously, which is inconvenient to use. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an oxygen air separation high-efficiency pressure swing adsorption device, which can solve the technical problems of being unable to adjust the pressure autonomously and being inconvenient to use.

[0004] The embodiment of the present application provides an oxygen air separation high-efficiency pressure swing adsorption device, including an adsorption tower body, the adsorption tower body including a shell, a first molecular sieve, a second molecular sieve, a top sealing plate, and a bottom sealing plate, the first molecular sieve and the second molecular sieve are both arranged in an annular shape, the first molecular sieve and the second molecular sieve are both installed inside the shell, the second molecular sieve is arranged outside the second molecular sieve, the top sealing plate is installed at the top between the first molecular sieve and the second molecular sieve, the bottom sealing plate is installed at the bottom between the first molecular sieve and the second molecular sieve, a first through hole is provided on the top sealing plate, the first through hole is externally connected to a first air outlet pipe, the first air outlet pipe is externally connected to a first variable frequency pressure regulating pump, an air inlet pipe is provided at the lower end of the shell, a second air outlet pipe is provided at the upper end of the shell, a third air outlet pipe is provided on the side of the shell, and a second variable frequency pressure regulating pump is provided on the second air outlet pipe and the third air outlet pipe.

[0005] Preferably, a first solenoid valve is provided on the air inlet pipe, the first air outlet pipe, the second air outlet pipe, and the third air outlet pipe.

[0006] Preferably, the bottom sealing plate is provided with a second through hole, and the second through hole is externally connected to a fourth air outlet pipe.

[0007] Preferably, a third variable frequency pressure regulating pump is provided on the fourth air outlet pipe.

[0008] Preferably, a second solenoid valve is provided on the fourth air outlet pipe.

[0009] Preferably, pressure detection sensors are provided inside the first molecular sieve, between the first molecular sieve and the second molecular sieve, and outside the second molecular sieve.

[0010] Preferably, the pressure detection sensor is electrically connected to the first variable frequency pressure regulating pump, the second variable frequency pressure regulating pump or the third variable frequency pressure regulating pump through a controller.

[0011] Beneficial effects of the utility model:

[0012] The utility model provides an oxygen air separation high-efficiency pressure swing adsorption device, comprising an adsorption tower body, the adsorption tower body comprising a shell, a first molecular sieve, a second molecular sieve, a top sealing plate, and a bottom sealing plate, the first molecular sieve and the second molecular sieve are both arranged in an annular shape, the first molecular sieve and the second molecular sieve are both installed inside the shell, the second molecular sieve is arranged outside the second molecular sieve, the top sealing plate is installed at the top between the first molecular sieve and the second molecular sieve, the bottom sealing plate is installed at the bottom between the first molecular sieve and the second molecular sieve, the top sealing plate is provided with a first through hole, the first through hole is externally connected to a first air outlet pipe, the first air outlet pipe is externally connected to a first A variable frequency pressure regulating pump, an air inlet pipe is provided at the lower end of the shell, a second air outlet pipe is provided at the upper end of the shell, a third air outlet pipe is provided at the side of the shell, and a second variable frequency pressure regulating pump is provided on the second air outlet pipe and the third air outlet pipe. The first molecular sieve of the utility model performs the first air separation, and the second air separation is performed by the second molecular sieve. During use, the pressure can be adjusted by the first variable frequency pressure regulating pump and the second variable frequency pressure regulating pump. The rotation speed of the first variable frequency pressure regulating pump and the second variable frequency pressure regulating pump can be adjusted according to demand, so that the pressure inside the shell can be increased or decreased, and the pressure inside the first molecular sieve, between the first molecular sieve and the second molecular sieve, and between the second molecular sieve and the shell can be increased or decreased. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] The reference numerals are:

[0016] 1. Adsorption tower body; 2. Shell; 3. First molecular sieve; 4. Second molecular sieve; 5. Top sealing plate; 6. Bottom sealing plate; 7. First through hole; 8. First air outlet pipe; 9. First variable frequency pressure regulating pump; 10. Air inlet pipe; 11. Second air outlet pipe; 12. Third air outlet pipe; 13. Second variable frequency pressure regulating pump; 14. First solenoid valve; 15. Second through hole; 16. Fourth air outlet pipe; 17. Third variable frequency pressure regulating pump; 18. Second solenoid valve; 19. Pressure detection sensor. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] like Figure 1 As shown, an oxygen air separation high-efficiency pressure swing adsorption device includes an adsorption tower body 1, the adsorption tower body 1 includes a shell 2, a first molecular sieve 3, a second molecular sieve 4, a top sealing plate 5, and a bottom sealing plate 6. The first molecular sieve 3 and the second molecular sieve 4 are both arranged in an annular shape, the first molecular sieve 3 and the second molecular sieve 4 are both installed inside the shell 2, the second molecular sieve 4 is arranged outside the second molecular sieve 4, the top sealing plate 5 is installed at the top between the first molecular sieve 3 and the second molecular sieve 4, the bottom sealing plate 6 is installed at the bottom between the first molecular sieve 3 and the second molecular sieve 4, the top sealing plate 5 is provided with a first through hole 7, the first through hole 7 is externally connected to a first air outlet pipe 8, and the first air outlet pipe 8 is externally connected to a first variable frequency pressure regulating pump 9, an air inlet pipe 10 is provided at the lower end of the shell 2, a second air outlet pipe 11 is provided at the upper end of the shell 2, a third air outlet pipe 12 is provided at the side of the shell 2, and a second variable frequency pressure regulating pump 13 is provided on the second air outlet pipe 11 and the third air outlet pipe 12. The first molecular sieve 3 of the utility model performs the first air separation, and the second air separation is performed by the second molecular sieve 4. During use, the pressure can be adjusted by the first variable frequency pressure regulating pump 9 and the second variable frequency pressure regulating pump 13. The rotation speed of the first variable frequency pressure regulating pump 9 and the second variable frequency pressure regulating pump 13 can be adjusted according to demand, so that the pressure inside the shell 2 can be increased or decreased, and the pressure inside the first molecular sieve 3, between the first molecular sieve 3 and the second molecular sieve 4, and between the second molecular sieve 4 and the shell 2 can be increased or decreased.

[0024] like Figure 1 As shown, in this embodiment, the first solenoid valve 14 is provided on the air inlet pipe 10, the first air outlet pipe 8, the second air outlet pipe 11, and the third air outlet pipe 12, the bottom sealing plate 6 is provided with a second through hole 15, the second through hole 15 is externally connected to a fourth air outlet pipe 16, and the fourth air outlet pipe 16 is provided with a second solenoid valve 18. Specifically, the first solenoid valve 14 and the second solenoid valve 18 can be opened or closed as needed during use.

[0025] like Figure 1As shown, in this embodiment, a third variable frequency pressure regulating pump 17 is provided on the fourth air outlet pipe 16. Specifically, the pressure between the first molecular sieve 3 and the second molecular sieve 4 can be adjusted by the first variable frequency pressure regulating pump 9 and the third variable frequency pressure regulating pump 17, and the pressure inside the first molecular sieve 3 and between the second molecular sieve 4 and the shell 2 can be adjusted by the second variable frequency pressure regulating pump 13.

[0026] like Figure 1 As shown, in this embodiment, pressure detection sensors 19 are provided inside the first molecular sieve 3, between the first molecular sieve 3 and the second molecular sieve 4, and outside the second molecular sieve 4. The pressure detection sensor 19 is electrically connected to the first variable frequency pressure regulating pump 9, the second variable frequency pressure regulating pump 13 or the third variable frequency pressure regulating pump 17 through a controller. Specifically, the pressure detected by the pressure detection sensor 19 can be used to adjust the operating speed of the first variable frequency pressure regulating pump 9, the second variable frequency pressure regulating pump 12 or the third variable frequency pressure regulating pump 17 through the controller. The controller can be a PLC or a single-chip microcomputer.

[0027] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oxygen air separation high efficiency pressure swing adsorption device, characterized in that: The invention comprises an adsorption tower body, wherein the adsorption tower body comprises a shell, a first molecular sieve, a second molecular sieve, a top sealing plate, and a bottom sealing plate. The first molecular sieve and the second molecular sieve are both arranged in a ring shape, the first molecular sieve and the second molecular sieve are both installed inside the shell, and the second molecular sieve is arranged outside the second molecular sieve. The top sealing plate is installed at the top between the first molecular sieve and the second molecular sieve, and the bottom sealing plate is installed at the bottom between the first molecular sieve and the second molecular sieve. A first through hole is arranged on the top sealing plate, and a first air outlet pipe is externally connected to the first through hole, and a first variable frequency pressure regulating pump is externally connected to the first air outlet pipe. An air inlet pipe is arranged at the lower end of the shell, and a second air outlet pipe is arranged at the upper end of the shell. A third air outlet pipe is arranged on the side of the shell, and a second variable frequency pressure regulating pump is arranged on the second air outlet pipe and the third air outlet pipe.

2. The oxygen air separation high-efficiency pressure swing adsorption device according to claim 1, characterized in that: The air inlet pipe, the first air outlet pipe, the second air outlet pipe, and the third air outlet pipe are all provided with a first solenoid valve.

3. The oxygen air separation high-efficiency pressure swing adsorption device according to claim 1, characterized in that: The bottom sealing plate is provided with a second through hole, and the second through hole is externally connected to a fourth air outlet pipe.

4. The oxygen air separation high-efficiency pressure swing adsorption device according to claim 3, characterized in that: The fourth air outlet pipe is provided with a third variable frequency pressure regulating pump.

5. The oxygen air separation high-efficiency pressure swing adsorption device according to claim 3, characterized in that: The fourth air outlet pipe is provided with a second solenoid valve.

6. The oxygen air separation high-efficiency pressure swing adsorption device according to claim 1, characterized in that: Pressure detection sensors are arranged inside the first molecular sieve, between the first molecular sieve and the second molecular sieve, and outside the second molecular sieve.

7. The oxygen air separation high-efficiency pressure swing adsorption device according to claim 6, characterized in that: The pressure detection sensor is electrically connected to the first variable frequency pressure regulating pump, the second variable frequency pressure regulating pump or the third variable frequency pressure regulating pump through a controller.

Images