VPSA variable pressure separation structure

Abstract

The utility model discloses a VPSA variable pressure separation structure which comprises a reflux pump, an up-flow pipe, a separation cylinder, a compressor and a first shunt pipe, the up-flow pipe and the first shunt pipe are arranged at the two ends of the separation cylinder respectively, the compressor is arranged in the middle of the first shunt pipe, an exhaust head is arranged in the middle of the up-flow pipe, and the exhaust head is arranged in the middle of the separation cylinder. And a second flow dividing pipe is arranged on one side of the upper flow pipe, and the second flow dividing pipe is circularly connected with the lower position of one side of the separation cylinder through a backflow pipe. The two separating cylinders are arranged and connected through the first flow dividing pipe, the compressor is arranged in the middle of the first flow dividing pipe, and therefore guided-in air can be divided into the two separating cylinders to be separated at the same time, and the air separating efficiency is effectively improved; an up-flow pipe is arranged at the top of the separation barrel, an air suction head capable of being inserted into the separation barrel is arranged at the bottom end of the up-flow pipe, so that the separated oxygen can be directly sucked out, and a second flow dividing pipe is arranged on one side of the up-flow pipe.

Description

Technical Field

[0001] The utility model relates to the relevant field of VPSA voltage transformer separation structure, in particular to a VPSA voltage transformer separation structure. Background Art

[0002] The VPSA pressure swing separation structure is used to adjust the adsorption capacity by changing the pressure, so as to separate and process the air. The adsorption system consists of two adsorption towers and pipelines. The adsorption tower also contains the domestically advanced PU-8 as an adsorbent. The treated process air enters from the bottom of one of the adsorption towers. When passing through the adsorption layer, the carbon dioxide, water vapor, etc. in the air are adsorbed by the adsorbent.

[0003] For example, the authorized patent with publication number CN213528033U (VPSA pressure swing adsorption oxygen production tank self-compacting device): including a tank body, a cover plate is provided at the upper opening of the tank body, a mounting hole is provided in the middle of the self-compacting device, a ceramic ball is provided at the upper end of the mounting hole, and alumina is provided at the lower end of the molecular sieve and the upper end of the self-compacting device in the interior of the tank body. The VPSA pressure swing adsorption oxygen production tank self-compacting device changes the original manual compressing method to automatic compressing, and does not need to be operated when the equipment is shut down, which reduces manual operation and optimizes personnel operation. Each fan-shaped pressure plate can be easily disassembled, assembled and replaced to meet different equipment requirements and facilitate future equipment maintenance. At the same time, the ceramic ball can increase gravity, making the force on the fan-shaped pressure plate more uniform, and it is not easy to cause the pressure plate to deform when there is air pressure and vacuum, and the molecular sieve is not easy to run out or powderize, which greatly improves the practicality of the fan-shaped pressure plate;

[0004] The above-mentioned prior art has low separation efficiency, cannot perform separation treatment in two tanks at the same time, and the mixed gas in the separation process cannot be recycled for multiple treatments, the separation is not thorough enough, and the discharge control of the separated oxygen and nitrogen is not convenient enough. Utility Model Content

[0005] The purpose of the utility model is to provide a VPSA pressure swing separation structure to solve the problems of low separation efficiency, inability to separate and process two tanks at the same time, inability to circulate the mixed gas in the separation process for multiple times, insufficient separation, and inconvenient control of the discharge of separated oxygen and nitrogen, etc., proposed in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a VPSA pressure change separation structure, including a reflux pump, an upflow pipe, a separation cylinder, a compressor and a first diversion pipe, the two ends of the separation cylinder are respectively provided with an upflow pipe and a first diversion pipe, a compressor is provided in the middle of the first diversion pipe, an exhaust head is provided in the middle of the upflow pipe, a second diversion pipe is provided on one side of the upflow pipe, and the second diversion pipe is cyclically connected to a lower position on one side of the separation cylinder through a reflux pipe.

[0007] In a further embodiment, an air intake pipe is provided on the top of the compressor, and a flange plate is provided at the end of the air intake pipe.

[0008] In a further embodiment, a second control valve is provided on the second shunt pipe, a reflux pump is provided at the end of the second shunt pipe, and the reflux pump is connected to the reflux pipe.

[0009] In a further embodiment, a first control valve is provided on the first shunt pipe, and flange plates are provided at both ends of the first shunt pipe.

[0010] In a further embodiment, a suction head is provided at the middle of the bottom end of the upflow pipe, and the suction head is inserted into the top of the inner cavity of the separation cylinder.

[0011] In a further embodiment, an adsorption core is provided inside the separation cylinder, and the adsorption core is used to separate nitrogen and oxygen.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with two separation cylinders, and the two separation cylinders are connected by a first diversion pipe. A compressor is provided in the middle of the first diversion pipe, so that the introduced air can be diverted to the two separation cylinders for simultaneous separation and processing, thereby effectively improving the efficiency of air separation.

[0014] 2. The utility model has an upflow pipe on the top of the separation cylinder, and an air suction head which can be inserted into the separation cylinder is provided at the bottom of the upflow pipe, so that the separated oxygen can be directly sucked out. A second branch pipe is provided on one side of the upflow pipe, and a second control valve is provided on the second branch pipe. A reflux pump is provided at the end of the second branch pipe, and the reflux pump is connected to one side of the separation cylinder through the reflux pipe, so that it is convenient to circulate the air and make the separation of the air more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a VPSA voltage transformer separation structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the upflow pipe of the utility model;

[0017] Figure 3 This is a front view of the compressor of the utility model;

[0018] Figure 4 It is a structural schematic diagram of part A of the utility model.

[0019] In the figure: 1. Reflux pump; 2. Reflux pipe; 3. Upflow pipe; 4. Exhaust head; 5. Separation cylinder; 6. Compressor; 7. First diversion pipe; 8. First control valve; 9. Second diversion pipe; 10. Second control valve; 11. Inlet pipe; 12. Suction head. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1-4 The utility model provides an embodiment: a VPSA pressure change separation structure, including a reflux pump 1, an upflow pipe 3, a separation cylinder 5, a compressor 6 and a first branch pipe 7, the upflow pipe 3 and the first branch pipe 7 are respectively provided at both ends of the separation cylinder 5, the compressor 6 is provided in the middle of the first branch pipe 7, the exhaust head 4 is provided in the middle of the upflow pipe 3, a second branch pipe 9 is provided on one side of the upflow pipe 3, and the second branch pipe 9 is cyclically connected with a lower position of one side of the separation cylinder 5 through the reflux pipe 2.

[0022] The pressurized air is diverted to two separation cylinders 5 through the first diversion pipe 7, adsorption separation is performed through the separation cylinders 5, the air is compressed by the compressor 6, the separated gas is transported to the exhaust head 4 for discharge through the upflow pipe 3, and the air that is not separated thoroughly enough is returned through the reflux pipe 2 for circulation treatment.

[0023] Furthermore, an air intake pipe 11 is provided on the top of the compressor 6, and a flange plate is provided at the end of the air intake pipe 11, so that the installation of the air intake pipe 11 and the pipeline is facilitated by the flange plate.

[0024] Furthermore, a second control valve 10 is provided on the second diversion pipe 9, and a reflux pump 1 is provided at the end of the second diversion pipe 9. The reflux pump 1 is connected to the reflux pipe 2. The second control valve 10 can be used to control the opening and closing of the second diversion pipe 9, and the reflux pump 1 is used to control the reflux of air.

[0025] Furthermore, a first control valve 8 is provided on the first shunt pipe 7 , and flange plates are provided at both ends of the first shunt pipe 7 . The first control valve 8 can be used to control the opening and closing of the first shunt pipe 7 .

[0026] Furthermore, an air suction head 12 is provided in the middle of the bottom end of the upflow pipe 3 , and the air suction head 12 is inserted into the top of the inner cavity of the separation cylinder 5 , so that the air after separation can be easily absorbed by the air suction head 12 .

[0027] Furthermore, an adsorption core is provided inside the separation cylinder 5, and the adsorption core is used to separate nitrogen and oxygen.

[0028] Working principle: When in use, the two separation cylinders 5 are connected through the first diversion pipe 7, and the air is introduced into the compressor 6 through the intake pipe 11. After being pressurized by the compressor 6, it is diverted to the first diversion pipe 7. The opening and closing of the first diversion pipe 7 is controlled by the first control valve 8. The air is diverted to the two separation cylinders 5 through the first diversion pipe 7, and adsorption separation is carried out through the adsorption layer in the separation cylinder 5. The separated oxygen is absorbed into the upstream pipe 3 by the suction head 12 and discharged through the exhaust head 4. The opening and closing of the second diversion pipe 9 can be controlled by the second control valve 10, so that the air after preliminary separation is refluxed from the reflux pump 1 to the reflux pipe 2, and then refluxed to the separation cylinder 5 through the reflux pipe 2 for circulating separation treatment.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A VPSA pressure-switching separation structure, comprising a reflux pump (1), an upstream pipe (3), a separation cylinder (5), a compressor (6) and a first diversion pipe (7), characterized in that: An upflow pipe (3) and a first branch pipe (7) are respectively provided at both ends of the separation cylinder (5); a compressor (6) is provided in the middle of the first branch pipe (7); an exhaust head (4) is provided in the middle of the upflow pipe (3); a second branch pipe (9) is provided on one side of the upflow pipe (3); and the second branch pipe (9) is cyclically connected to a lower position of one side of the separation cylinder (5) via a return pipe (2).

2. A VPSA voltage transformation separation structure according to claim 1, characterized in that: An air intake pipe (11) is provided at the top of the compressor (6), and a flange plate is provided at the end of the air intake pipe (11).

3. The VPSA voltage transformation separation structure according to claim 1, characterized in that: The second branch pipe (9) is provided with a second control valve (10), and the end of the second branch pipe (9) is provided with a reflux pump (1), and the reflux pump (1) is connected to the reflux pipe (2).

4. The VPSA voltage transformation separation structure according to claim 1, characterized in that: The first flow dividing pipe (7) is provided with a first control valve (8), and flange plates are provided at both ends of the first flow dividing pipe (7).

5. The VPSA voltage transformation separation structure according to claim 1, characterized in that: A suction head (12) is provided at the middle of the bottom end of the upflow pipe (3), and the suction head (12) is inserted into the top of the inner cavity of the separation cylinder (5).

6. The VPSA voltage transformation separation structure according to claim 1, characterized in that: An adsorption core is arranged inside the separation cylinder (5), and the adsorption core is used to separate nitrogen and oxygen.

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