PSA (Pressure Swing Adsorption) nitrogen-making device

Abstract

The utility model discloses a PSA (Pressure Swing Adsorption) nitrogen-making device which comprises an adsorption barrel, a first adsorption chamber and a second adsorption chamber are arranged in the adsorption barrel, the second adsorption chamber is sleeved on the outer side of the first adsorption chamber, and both the first adsorption chamber and the second adsorption chamber are filled with adsorbents; the bottom of the adsorption cylinder is connected with a gas inlet pipeline, gas channels are formed in the bottom and the top of the first adsorption chamber and the side wall of the upper end of the second adsorption chamber, and the lower end of the second adsorption chamber is connected with a gas outlet pipeline; according to the utility model, the contact time of the gas and the adsorbent is effectively prolonged, and the adsorption effect is improved, so that the prepared nitrogen can meet the higher purity requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of PSA nitrogen making, specifically relates to a PSA nitrogen making device. BACKGROUND

[0002] Nitrogen is a kind of inert gas, generally does not react with other substances, and the inert quality makes it can be widely used in many anaerobic environments, such as the air in the specific container is replaced by nitrogen gas displacement, plays the role of isolation, flame retardant, explosion-proof, anticorrosion.Industrial nitrogen is mainly realized by separating air. At present, there are three methods of nitrogen making, that is, cryogenic method, pressure swing adsorption (PSA) method and membrane method. The working principle of PSA nitrogen making machine is based on pressure swing adsorption technology, and the difference in adsorption performance of carbon molecular sieve to different gas molecules is used to separate nitrogen and oxygen in air. The adsorption capacity of carbon molecular sieve to nitrogen and oxygen is different, the oxygen molecules with smaller diameter diffuse faster and enter the molecular sieve more; the nitrogen molecules with larger diameter diffuse slower and enter the molecular sieve less. By controlling the change of pressure, the separation and purification of nitrogen are realized.

[0003] For example, a PSA nitrogen making device is disclosed in a utility model patent with application number 202320515208.1, which includes an adsorption tank, the inner cavity of the adsorption tank is provided with an inert porcelain ball layer and a carbon molecular sieve layer from bottom to top, the inert porcelain ball layer is arranged in a gradient magnetic field, the adsorption tank is fixedly connected with four L-shaped air inlet pipes below, the four air inlet pipes are arranged in a circular array along the vertical axis of the adsorption tank, four shunt inner seats are fixedly welded on the bottom wall of the inner cavity of the adsorption tank, the inner part of each shunt inner seat is formed with an inflation groove, and the four air inlet pipes are communicated with the four inflation grooves. A plurality of circular array distributed outer extension pipes are welded on the upper part of each shunt inner seat, and supporting legs are welded on the four corners of the bottom wall of the adsorption tank. The PSA nitrogen making device enables the inert porcelain ball layer in the adsorption tank to work simultaneously and quickly separates oxygen and nitrogen. However, the gas running path in the device is short, and the contact time with the adsorbent is short, which cannot meet the higher purification requirements. Therefore, it is necessary to provide a new technical scheme to overcome the above defects. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a PSA nitrogen making device that can effectively solve the above technical problems.

[0005] In order to achieve the purpose of the utility model, the following technical scheme is adopted:

[0006] A PSA nitrogen making device, comprising an adsorption cylinder, a first adsorption chamber and a second adsorption chamber are arranged in the interior of the adsorption cylinder, the second adsorption chamber is sleeved outside the first adsorption chamber, and adsorbent is filled in the first adsorption chamber and the second adsorption chamber;

[0007] The bottom of the adsorption cylinder is connected with an air inlet pipeline, the bottom and the top of the first adsorption chamber and the upper end side wall of the second adsorption chamber are all provided with gas passages, and the lower end of the second adsorption chamber is connected with an air outlet pipeline.

[0008] Further, the inside of the adsorption cylinder is provided with a first gas dispersion chamber and a second gas dispersion chamber, the air inlet pipeline extends into the first gas dispersion chamber, and the air inlet pipeline is connected with a gas compressor.

[0009] Further, a turbine is rotatably connected in each of the first gas dispersion chamber and the second gas dispersion chamber, and the two turbines are connected to rotate synchronously through a driving rod.

[0010] Further, a central passage is formed in the middle of the first adsorption chamber, and the driving rod is rotatably connected to the top surface and the bottom surface of the central passage through sealing bearings.

[0011] Compared with the prior art, the PSA nitrogen preparation device has the following beneficial effects: when the device is used, mixed gas enters the adsorption cylinder through the air inlet pipeline, is adsorbed in the first adsorption chamber through the gas passage in the bottom of the first adsorption chamber, is adsorbed in the second adsorption chamber through the gas passage in the top of the first adsorption chamber, and is finally discharged through the air outlet pipeline; in this process, the movement path of the gas is in the shape of "n", thereby effectively increasing the contact time of the gas and the adsorbent, improving the adsorption effect, and making the prepared nitrogen meet higher purity requirements; meanwhile, the gas is dispersed by the turbine, so that the gas can be dispersed into the first adsorption chamber or the second adsorption chamber in equal amounts, the gas can be more fully contacted with the adsorbent, and the adsorption efficiency and the adsorption effect are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application.

[0013] Figure 1 It is a structural schematic view of the PSA nitrogen preparation device of the present application.

[0014] Figure 2 It is a partial sectional view of the PSA nitrogen preparation device of the present application.

[0015] In the drawings: 1. adsorption cylinder, 2. first adsorption chamber, 3. second adsorption chamber, 4. air inlet pipeline, 5. gas passage, 6. air outlet pipeline, 7. first gas dispersion chamber, 8. second gas dispersion chamber, 9. turbine, 10. driving rod, 11. sealing bearing, 12. central passage. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the following will make a clear and complete description of the technical scheme 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.

[0017] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. When a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and the like used in this paper are only for illustrative purposes.

[0018] As shown in Figure 1 and Figure 2 The present application provides a PSA nitrogen making device, which comprises an adsorption cylinder 1, wherein the inside of the adsorption cylinder 1 is sequentially provided with a first adsorption chamber 2 and a second adsorption chamber 3 from inside to outside, the second adsorption chamber 3 is sleeved outside the first adsorption chamber 2 and is fixed by bolts, and the first adsorption chamber 2 and the second adsorption chamber 3 are both filled with adsorbent; the bottom of the adsorption cylinder 1 is connected with an air inlet pipeline 4, the bottom and the top of the first adsorption chamber 2 and the upper end side wall of the second adsorption chamber 3 are all provided with gas passages 5, and the lower end of the second adsorption chamber 3 is connected with an air outlet pipeline 6. In addition, the bottom of the adsorption cylinder 1 and the bottom of the first adsorption chamber 2 and the second adsorption chamber 3 are both fixed with a sealing door plate by bolts, so as to replace the adsorbent.

[0019] During use, the mixed gas enters the adsorption cylinder 1 through the air inlet pipe 4, and enters the first adsorption chamber 2 through the gas channel 5 at the bottom of the first adsorption chamber 2 for primary adsorption, and then enters the second adsorption chamber 3 through the gas channel 5 at the top of the first adsorption chamber 2 for secondary adsorption, and is finally discharged through the air outlet pipe 6; during this process, the movement path of the gas is "n"-shaped, which effectively increases the contact time between the gas and the adsorbent, improves the adsorption effect, and enables the prepared nitrogen to meet higher purity requirements.

[0020] Specifically, in this embodiment, Figure 2 As shown, a first gas dispersion chamber 7 and a second gas dispersion chamber 8 are respectively provided at the bottom and the top of the adsorption cylinder 1, the air intake pipe 4 extends into the first gas dispersion chamber 7, and the air intake pipe 4 is connected to a gas compressor (not shown); at the same time, a turbine 9 is rotatably connected in the first gas dispersion chamber 7 and the second gas dispersion chamber 8, and the two turbines 9 are connected and rotated synchronously by a drive rod 10; the mixed gas forms a high-pressure gas after passing through the gas compressor, and then enters the first gas dispersion chamber 7 through the air intake pipe 4. During this process, the turbine 9 in the first gas dispersion chamber 7 rotates rapidly under the action of the high-pressure gas, and at the same time drives the turbine 9 in the second gas dispersion chamber 8 to rotate rapidly, thereby effectively dispersing the gas in the first gas dispersion chamber 7 and the second gas dispersion chamber 8, so that the gas can be dispersed into the first adsorption chamber 2 or the second adsorption chamber 3 in equal amounts, ensuring that the gas can be in more sufficient contact with the adsorbent, further improving the adsorption efficiency and adsorption effect.

[0021] At the same time, in this embodiment, a central channel 12 is opened in the middle of the first adsorption chamber 2, and the driving rod 10 is rotatably connected to the top and bottom surfaces of the central channel 12 through sealed bearings 11; thereby, the driving rod 10 can be effectively prevented from causing the adsorbent to be pulverized during the rotation process, thereby extending the service life of the adsorbent.

[0022] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0023] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A PSA nitrogen generator, characterized in that: The adsorption cylinder comprises a first adsorption chamber and a second adsorption chamber, wherein the second adsorption chamber is sleeved outside the first adsorption chamber, and the first adsorption chamber and the second adsorption chamber are both filled with adsorbent; The bottom of the adsorption cylinder is connected to an air inlet pipe, the bottom and top of the first adsorption chamber and the upper side wall of the second adsorption chamber are all provided with gas channels, and the lower end of the second adsorption chamber is connected to an air outlet pipe.

2. The PSA nitrogen generator according to claim 1, wherein: A first gas dispersion chamber and a second gas dispersion chamber are provided inside the adsorption cylinder. The air intake pipe extends into the first gas dispersion chamber, and the air intake pipe is connected to a gas compressor.

3. The PSA nitrogen generator according to claim 2, wherein: The first gas dispersion chamber and the second gas dispersion chamber are both rotatably connected with turbines, and the two turbines are connected and rotated synchronously via a driving rod.

4. The PSA nitrogen generator according to claim 3, wherein: A central channel is provided in the middle of the first adsorption chamber, and the driving rod is rotatably connected to the top surface and the bottom surface of the central channel via sealed bearings.

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