Variable-frequency pressure swing adsorption oxygen and nitrogen separation equipment

Abstract

The utility model relates to the technical field of oxygen and nitrogen adsorption separation equipment, and discloses frequency-variable and pressure-variable oxygen and nitrogen adsorption separation equipment which comprises a first separation body, a second separation body, a first three-way pipe and a second three-way pipe, and the input end of the first separation body and the input end of the second separation body are both fixedly communicated with the first three-way pipe; the output end of the first separation body and the output end of the second separation body are fixedly communicated with the second three-way pipe, and the first separation body and the second separation body are communicated through the first three-way pipe and the second three-way pipe. And then the first three-way valve and the second three-way valve are controlled to control the circulation path of the gas, so that when the first separation body needs to be maintained and overhauled, the circulation path is changed to communicate with the second separation body, and the effects that shutdown maintenance is reduced, adsorption materials need to be replaced regularly, and the production efficiency is improved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen-nitrogen adsorption separation equipment, in particular to variable frequency and pressure adsorption oxygen-nitrogen separation equipment. Background Art

[0002] Oxygen and nitrogen separation equipment, also known as air separation equipment (ASU), liquefies and distills air, ultimately separating it into oxygen, nitrogen, and other useful gases. Its minimum operating temperature is 77K. At the end of the 19th century, air was still considered a "permanent gas." Later, it was discovered that air could be liquefied at very low temperatures. Due to the different boiling points of oxygen and nitrogen, oxygen and nitrogen could be separated from liquefied air.

[0003] Since oxygen-nitrogen separation equipment requires repeated adsorption and desorption operations, the control system is relatively complex and requires shutdown maintenance. At the same time, the adsorption material needs to be replaced regularly, which affects production efficiency. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a variable frequency pressure swing adsorption oxygen-nitrogen separation device to solve the problem mentioned in the above background technology that the oxygen-nitrogen separation device needs to perform repeated adsorption and desorption operations, so the control system is relatively complex and requires shutdown maintenance. At the same time, the adsorption material needs to be replaced regularly, which affects production efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a variable frequency pressure swing adsorption oxygen and nitrogen separation equipment, comprising a separation body No. 1, a separation body No. 2, a tee pipe No. 1 and a tee pipe No. 2, characterized in that: the input ends of the separation body No. 1 and the separation body No. 2 are both fixedly connected to the tee pipe No. 1, the output ends of the separation body No. 1 and the separation body No. 2 are both fixedly connected to the tee pipe No. 2, a three-way valve body No. 1 is fixedly installed at the intersection of the tee pipe No. 1, and a three-way valve body No. 2 is fixedly installed at the intersection of the tee pipe No. 2.

[0006] Preferably, the bottoms of the No. 1 separation body and the No. 2 separation body are both connected and provided with a sewage pipe, the outer surface of the sewage pipe is provided with a valve body, and the tops of the No. 1 separation body and the No. 2 separation body are both provided with a clamping cylinder.

[0007] Preferably, the input end of the No. 1 three-way pipe is fixedly connected to a refrigerated dryer, the input end of the refrigerated dryer is fixedly connected to a filter, and the input end of the filter is connected to an air pump.

[0008] Preferably, the output end of the No. 2 tee pipe is fixedly connected to a buffer tank, an oxygen and nitrogen monitor is provided on the outer surface of the buffer tank, and an air outlet pipe is fixedly connected to the outer surface of the buffer tank.

[0009] Preferably, the No. 1 separation body and the No. 2 separation body are both composed of adsorption towers of adsorbents, and the adsorption towers are connected by pipelines, and the outer surfaces of the pipelines are provided with pipeline pneumatic valves and throttle valves.

[0010] Preferably, a base is provided at the bottom of the No. 1 separation body, No. 2 separation body, air pump, refrigerated dryer, filter and buffer tank, and a controller is provided on the outer surface of the base, and the controller is electrically connected to the No. 1 three-way valve, No. 2 three-way valve and the valve body.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The variable frequency pressure swing adsorption oxygen and nitrogen separation equipment connects the No. 1 separation body and the No. 2 separation body through the No. 1 three-way pipe and the No. 2 three-way pipe, and then controls the No. 1 three-way valve and the No. 2 three-way valve to control the flow path of the gas. When the No. 1 separation body needs to be maintained and repaired, the flow path is changed to connect with the No. 2 separation body, thereby reducing the need for shutdown maintenance, requiring regular replacement of adsorption materials, and improving production efficiency.

[0013] 2. The variable frequency pressure swing adsorption oxygen and nitrogen separation equipment separates by controlling the compression cylinder, and then when the valve body is opened, the sewage pipe discharges sewage to the bottom of the No. 1 separation body or the No. 2 separation body, thereby reducing the effect of the No. 1 separation body and the No. 2 separation body being relatively fixed and difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic top view of the structure of the utility model;

[0016] Figure 3 This is a front view schematic diagram of the structure of the utility model;

[0017] Figure 4 It is a front sectional schematic diagram of the structure of the utility model.

[0018] In the figure: 1. Separation body No. 1; 2. Separation body No. 2; 3. Three-way pipe No. 1; 4. Three-way valve No. 1; 5. Three-way pipe No. 2; 6. Three-way valve No. 2; 7. Refrigeration dryer; 8. Filter; 9. Air pump; 10. Buffer tank; 11. Oxygen and nitrogen monitor; 12. Exhaust pipe; 13. Drain pipe; 14. Valve body; 15. Base; 16. Compression cylinder. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1:

[0021] Please refer to Figures 1-4.

[0022] A variable frequency pressure swing adsorption oxygen and nitrogen separation device includes a separation body No. 1 1, a separation body No. 2 2, a tee No. 1 3 and a tee No. 2 5. The input ends of the separation body No. 1 1 and the separation body No. 2 2 are fixedly connected to the tee No. 1 3, and the output ends of the separation body No. 1 1 and the separation body No. 2 2 are fixedly connected to the tee No. 2 5. A three-way valve No. 1 4 is fixedly installed at the intersection of the tee No. 1 3, and a three-way valve No. 2 6 is fixedly installed at the intersection of the tee No. 2 5.

[0023] Specifically, the No. 1 separation body 1 and the No. 2 separation body 2 are connected through the No. 1 three-way pipe 3 and the No. 2 three-way pipe 5, and then the No. 1 three-way valve 4 and the No. 2 three-way valve 6 are controlled to control the flow path of the gas, so that when the No. 1 separation body 1 needs to be maintained and repaired, the flow path is changed to connect with the No. 2 separation body 2, thereby reducing the need for shutdown maintenance, facilitating regular replacement of adsorption materials, and improving production efficiency.

[0024] In the embodiment, the input end of the No. 1 tee pipe 3 is fixedly connected to a refrigerated dryer 7 , the input end of the refrigerated dryer 7 is fixedly connected to a filter 8 , and the input end of the filter 8 is connected to an air pump 9 .

[0025] Specifically, the input end of the No. 1 three-way pipe 3 is fixedly connected to a refrigerated dryer 7, the input end of the refrigerated dryer 7 is fixedly connected to a filter 8, and the input end of the filter 8 is connected to an air pump 9 to reduce the impact of high humidity on the adsorption capacity of the adsorption material, thereby affecting the oxygen production effect.

[0026] In the embodiment, the output end of the No. 2 tee pipe 5 is fixedly connected to a buffer tank 10 , an oxygen and nitrogen monitor 11 is provided on the outer surface of the buffer tank 10 , and an air outlet pipe 12 is fixedly connected to the outer surface of the buffer tank 10 .

[0027] Specifically, a buffer tank 10 is fixedly connected to the output end of the No. 2 tee pipe 5. An oxygen and nitrogen monitor 11 is provided on the outer surface of the buffer tank 10 to monitor the gas, so as to understand the usage of the No. 1 separation body 1 and the No. 2 separation body 2. An outlet pipe 12 is fixedly connected to the outer surface of the buffer tank 10 to discharge the gas.

[0028] In the embodiment: the first separation body 1 and the second separation body 2 are both composed of adsorption towers of adsorbents, and the adsorption towers are connected by pipelines, and the outer surfaces of the pipelines are provided with pipeline pneumatic valves and throttle valves.

[0029] Specifically, because both the No. 1 separation body 1 and the No. 2 separation body 2 are composed of adsorption towers of adsorbents, and the adsorption towers are connected by pipelines, and the outer surface of the pipeline is provided with pipeline pneumatic valves and throttle valves, these adsorption towers are located in the oxygen-nitrogen separator and are the core components of the nitrogen production equipment. The working principle of the oxygen-nitrogen separator is based on the pressure swing adsorption technology of carbon molecular sieves, in which the adsorption towers are divided into two, Tower A and Tower B, which are specially used for purifying air. In compressed air, according to the different oxygen absorption amounts of the oxygen absorber at different pressures, the pressurized adsorbent in the adsorption tower absorbs oxygen to produce nitrogen, while the vacuum adsorbent deoxygenates and regenerates. The two towers work alternately to realize a continuous oxygen-nitrogen separation process. This process is automatically controlled by the PLC controller to ensure efficient and automated nitrogen production.

[0030] Working principle: Because the input ends of the No. 1 separation body 1 and the No. 2 separation body 2 are fixedly connected to the No. 1 three-way pipe 3, and the output ends of the No. 1 separation body 1 and the No. 2 separation body 2 are fixedly connected to the No. 2 three-way pipe 5, the No. 1 three-way valve 4 is fixedly installed at the intersection of the No. 1 three-way pipe 3, and the No. 2 three-way valve 6 is fixedly installed at the intersection of the No. 2 three-way pipe 5. The No. 1 separation body 1 and the No. 2 separation body 2 are connected through the No. 1 three-way pipe 3 and the No. 2 three-way pipe 5, and the No. 1 three-way valve 4 and the No. 2 three-way valve 6 are controlled to control the flow path of the gas, so that when the No. 1 separation body 1 needs to be maintained and overhauled, the flow path is changed to connect with the No. 2 separation body 2. Compared with the relevant technology, the variable frequency pressure swing adsorption oxygen and nitrogen separation equipment provided by the utility model has the following beneficial effects: thereby reducing the need for shutdown maintenance, requiring regular replacement of adsorption materials, and improving production efficiency.

[0031] Example 2:

[0032] Please refer to Figures 1-4.

[0033] The bottoms of the No. 1 separation body 1 and the No. 2 separation body 2 are both connected and provided with a sewage pipe 13, the outer surface of the sewage pipe 13 is provided with a valve body 14, and the tops of the No. 1 separation body 1 and the No. 2 separation body 2 are both provided with a clamping cylinder 16.

[0034] Specifically, by controlling the compression cylinder 16 to separate, and then opening the valve body 14, the sewage pipe 13 discharges sewage to the bottom of the No. 1 separation body or the No. 2 separation body 2, thereby achieving the effect of reducing the No. 1 separation body 1 and the No. 2 separation body 2 being relatively fixed and difficult to clean.

[0035] In the embodiment: a base 15 is provided at the bottom of the No. 1 separation body 1, the No. 2 separation body 2, the air pump 9, the refrigerated dryer 7, the filter 8 and the buffer tank 10, and a controller is provided on the outer surface of the base 15, and the controller is electrically connected to the No. 1 three-way valve 4, the No. 2 three-way valve 6 and the valve body 14.

[0036] Specifically, a base 15 is provided at the bottom of the No. 1 separation body 1, the No. 2 separation body 2, the air pump 9, the refrigerated dryer 7, the filter 8 and the buffer tank 10, and a controller is provided on the outer surface of the base 15. The controller is electrically connected to the No. 1 three-way valve 4, the No. 2 three-way valve 6 and the valve body 14. The controller is an existing structure, and the control circuit can be implemented through simple programming by technicians in this field. It is common knowledge in this field and is only used without modification. Therefore, the control method and circuit connection are no longer described in detail to facilitate centralized control of the equipment.

[0037] Working principle: Because the bottoms of the No. 1 separation body 1 and the No. 2 separation body 2 are connected and are provided with a drain pipe 13, the outer surface of the drain pipe 13 is provided with a valve body 14, and the tops of the No. 1 separation body 1 and the No. 2 separation body 2 are provided with a clamping cylinder 16. The clamping cylinder 16 is controlled to separate, and then when the valve body 14 is opened, the drain pipe 13 discharges sewage to the bottom of the No. 1 separation body or the No. 2 separation body 2. Compared with the relevant technology, the variable frequency pressure swing adsorption oxygen and nitrogen separation equipment provided by the utility model has the following beneficial effects: thereby achieving the effect of reducing the No. 1 separation body 1 and the No. 2 separation body 2 being relatively fixed and difficult to clean.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable frequency pressure swing adsorption oxygen and nitrogen separation device, comprising a first separation body (1), a second separation body (2), a first tee pipe (3) and a second tee pipe (5), characterized in that: The input ends of the No. 1 separation body (1) and the No. 2 separation body (2) are both fixedly connected to the No. 1 three-way pipe (3), and the output ends of the No. 1 separation body (1) and the No. 2 separation body (2) are both fixedly connected to the No. 2 three-way pipe (5). A No. 1 three-way valve (4) is fixedly installed at the intersection of the No. 1 three-way pipe (3), and a No. 2 three-way valve (6) is fixedly installed at the intersection of the No. 2 three-way pipe (5).

2. The variable frequency pressure swing adsorption oxygen and nitrogen separation equipment according to claim 1, characterized in that: The bottoms of the No. 1 separation body (1) and the No. 2 separation body (2) are both connected and provided with a sewage pipe (13), the outer surface of the sewage pipe (13) is provided with a valve body (14), and the tops of the No. 1 separation body (1) and the No. 2 separation body (2) are both provided with a pressing cylinder (16).

3. The variable frequency pressure swing adsorption oxygen and nitrogen separation equipment according to claim 1, characterized in that: The input end of the No. 1 three-way pipe (3) is fixedly connected to a refrigerated dryer (7), the input end of the refrigerated dryer (7) is fixedly connected to a filter (8), and the input end of the filter (8) is connected to an air pump (9).

4. The variable frequency pressure swing adsorption oxygen and nitrogen separation equipment according to claim 1, characterized in that: The output end of the No. 2 three-way pipe (5) is fixedly connected to a buffer tank (10), an oxygen and nitrogen monitor (11) is provided on the outer surface of the buffer tank (10), and an air outlet pipe (12) is fixedly connected to the outer surface of the buffer tank (10).

5. The variable frequency pressure swing adsorption oxygen and nitrogen separation equipment according to claim 1, characterized in that: The first separation body (1) and the second separation body (2) are both composed of adsorption towers of adsorbents, and the adsorption towers are connected by pipelines, and the outer surfaces of the pipelines are provided with pipeline-type pneumatic valves and throttle valves.

6. The variable frequency pressure swing adsorption oxygen and nitrogen separation equipment according to claim 2, characterized in that: A base (15) is provided at the bottom of the No. 1 separation body (1), the No. 2 separation body (2), the air pump (9), the refrigerated dryer (7), the filter (8) and the buffer tank (10). A controller is provided on the outer surface of the base (15). The controller is electrically connected to the No. 1 three-way valve (4), the No. 2 three-way valve (6) and the valve body (14).

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