Device for collecting pulse low-concentration oxygen-enriched gas of nitrogen making machine

Abstract

The utility model relates to the field of pulse oxygen-enriched gas collecting devices, and particularly discloses a device for collecting pulse low-concentration oxygen-enriched gas of a nitrogen making machine. By arranging the pressure equalizing and noise reducing collection box, the valve assembly, the buffer gas storage tank, the pressure regulating and flow stabilizing assembly, the supercharger, the oxygen-enriched mixer and the like, the pressure equalizing and noise reducing collection box is connected to the exhaust port of the nitrogen making machine to collect low-concentration oxygen-enriched gas discharged by the nitrogen making machine, and local high pressure, caused by pulse air pressure, of the exhaust port of the low-concentration oxygen-enriched gas is avoided; by arranging a plurality of valve assemblies and a buffer gas storage tank, the collected pulse low-concentration oxygen-enriched gas is stored, a pressure regulating and flow stabilizing assembly regulates and stabilizes the pressure and the flow of the oxygen-enriched gas, the valve assemblies can also regulate the use amount of air and the low-concentration oxygen-enriched gas, and the influence on the total air volume of an application end is avoided; the whole set of equipment can efficiently and stably recover pulse low-concentration oxygen-enriched gas on the premise that safe and stable operation of the nitrogen making machine is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of pulse oxygen-rich gas collection devices, and particularly relates to a device for collecting pulse low-concentration oxygen-rich gas of a nitrogen generator. Background Technique

[0002] In recent years, with the development of China's industry, the usage of some industrial gases has increased rapidly, such as nitrogen, oxygen, etc. Among them, nitrogen, as an inert gas that is easy to prepare, has been widely used due to its stable properties. Manufacturers in some fields such as chemical industry, electronics, metallurgy, food, machinery, etc. will use nitrogen generators to produce nitrogen.

[0003] There are various types of nitrogen generators. One type of nitrogen generator uses the pressure swing adsorption method to prepare nitrogen. During the process of producing high-purity nitrogen by this pressure swing adsorption method of nitrogen generator, pulse low-concentration oxygen-rich waste gas will also be generated, and the oxygen concentration in the waste gas is about 28%. At present, in view of the fact that this part of low-concentration oxygen-rich gas is pulsed emission, the pulse period is about 57s, and the pulse duration is about 5s. Because the recovery is difficult and the pulse fluctuation will be caused to the efficient utilization of the application end after recovery, the pulse low-concentration oxygen-rich waste gas generated by the pressure swing adsorption method of nitrogen generator is discharged and wasted, which undoubtedly causes waste of oxygen resources in the waste gas and cannot achieve the comprehensive and efficient utilization of resources.

[0004] Therefore, it is necessary to set up a set of system equipment that can eliminate the pulse fluctuation of this low-concentration oxygen-rich gas, and can stably collect and apply the oxygen-rich gas, so as to realize the safe recovery and utilization of oxygen-rich gas resources on the premise of not affecting the safe and stable operation of the nitrogen generator. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for collecting pulse low-concentration oxygen-rich gas of a nitrogen generator to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for collecting pulse low-concentration oxygen-rich gas of a nitrogen generator, comprising:

[0008] A pressure equalizing and noise reduction collection box, and the pressure equalizing and noise reduction collection box is connected to the pulse low-concentration oxygen-rich gas;

[0009] A first-stage buffer gas storage tank, the first-stage buffer gas storage tank is connected to the pressure equalizing and noise reduction collection box through a pipeline, and a first automatic protection system is arranged on the connecting pipeline;

[0010] An oxygen-rich gas booster, the oxygen-rich gas booster is connected to the first-stage buffer gas storage tank through a pipeline, and a pressure regulating and flow stabilizing component is arranged on the connecting pipeline;

[0011] Secondary buffer gas storage tank, which is connected to the oxygen-enriched gas booster by a pipeline, and a second automatic protection system is provided on the connecting pipeline;

[0012] Application end blower, which is connected to the secondary buffer gas storage tank by a pipeline, and a valve assembly and an oxygen-enriched gas mixer are provided on the connecting pipeline.

[0013] Preferably, the internal pressure value of the pressure equalizing and noise reducing collection box is evenly distributed quickly.

[0014] Preferably, both the oxygen-enriched gas booster and the application end blower are equipped with frequency converters, and when the booster operates and the pressure equalizing and noise reducing collection box starts to collect pulsed low-concentration oxygen-enriched gas, it is in a negative pressure state.

[0015] Preferably, the pressure regulating and flow stabilizing assembly is used to stabilize the pressure and flow rate of the oxygen-enriched gas in the pipeline system.

[0016] Preferably, the oxygen-enriched gas mixer is used to mix air and low-concentration oxygen-enriched gas to ensure the uniform and stable composition of the mixed gas.

[0017] Preferably, the first automatic protection system, the second automatic protection system and the valve assembly are all used to adjust the usage amounts of air and low-concentration oxygen-enriched gas.

[0018] Preferably, the primary buffer gas storage tank and the secondary buffer gas storage tank are respectively equipped with a first automatic protection system and a second automatic protection system to meet the safe and stable operation of the nitrogen generator. When the pressure of the gas storage tank system rises to the alarm value or the pressure of the gas storage tank system drops to the alarm value, the protection system control valve assembly automatically opens to discharge the low-concentration oxygen-enriched gas to the outside or allow air to enter the gas storage tank system from the valve assembly.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] The present utility model realizes the efficient recovery and application of pulsed low-concentration oxygen-enriched gas of the nitrogen generator by setting up relevant equipment and facilities such as a pressure equalizing and noise reducing collection box, two sets of automatic protection systems, two sets of valve assemblies, two-stage buffer gas storage tanks, a set of pressure regulating and flow stabilizing assembly, a set of oxygen-enriched gas booster and an oxygen-enriched gas mixer.

[0021] The pressure equalizing and noise reducing collection box is connected to the exhaust port of the pulsed low-concentration oxygen-rich gas discharged from the nitrogen generator, collecting the pulsed low-concentration oxygen-rich gas discharged by the nitrogen generator. At the same time, it avoids the local high pressure at the low-concentration oxygen-rich gas discharge port caused by the pulsed air pressure, ensuring the normal discharge of the pulsed low-concentration oxygen-rich gas. By setting two sets of automatic protection systems, the safe and stable operation of the nitrogen generator is satisfied, ensuring that there is no abnormal phenomenon of the nitrogen generator being stuffy and reducing the nitrogen concentration. Multiple sets of valve components and two-stage buffer gas storage tanks efficiently store and collect the pulsed low-concentration oxygen-rich gas. The oxygen-rich gas booster realizes the pressurized transportation of the oxygen-rich gas, and cooperates with the relevant valve components to realize the adjustment of the usage of air and low-concentration oxygen-rich gas, controlling the total air volume at the oxygen-rich gas application end and the oxygen concentration in the oxygen-rich gas. The pressure regulating and flow stabilizing component adjusts and stabilizes the pressure and flow of the pulsed oxygen-rich gas, weakening the fluctuation brought by the pulsed pressure to the oxygen-rich gas application end. The whole set of equipment can realize the efficient and stable recovery of the pulsed low-concentration oxygen-rich gas without affecting the safe and stable operation of the nitrogen generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0023] In the figure: 1, pressure equalizing and noise reducing collection box; 2, first automatic protection system; 3, primary buffer gas storage tank; 4, pressure regulating and flow stabilizing component; 5, oxygen-rich gas booster; 6, second automatic protection system; 7, secondary buffer gas storage tank; 8, valve component; 9, oxygen-rich gas mixer; 10, blower at the application end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0025] Embodiment 1:

[0026] Please refer to Figure 1 as shown, a device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator, comprising:

[0027] A pressure equalizing and noise reducing collection box 1, the pressure equalizing and noise reducing collection box 1 is connected to the pulsed low-concentration oxygen-rich gas, and the internal pressure value of the pressure equalizing and noise reducing collection box 1 is quickly evenly distributed;

[0028] A primary buffer gas storage tank 3, the primary buffer gas storage tank 3 is connected to the pressure equalizing and noise reducing collection box 1 through a pipeline, and a first automatic protection system 2 is arranged on the connecting pipeline;

[0029] Oxygen-enriched gas booster 5, the oxygen-enriched gas booster 5 is connected to the primary buffer gas storage tank 3 through a pipeline, and a pressure regulating and flow stabilizing component 4 is arranged on the connecting pipeline, and the pressure regulating and flow stabilizing component 4 is used to stabilize the pressure and flow rate of the oxygen-enriched gas in the pipeline system;

[0030] Secondary buffer gas storage tank 7, the secondary buffer gas storage tank 7 is connected to the oxygen-enriched gas booster 5 through a pipeline, and a second automatic protection system 6 is arranged on the connecting pipeline;

[0031] Application-side blower 10, the application-side blower 10 is connected to the secondary buffer gas storage tank 7 through a pipeline, and a valve assembly 8 and an oxygen-enriched gas mixer 9 are arranged on the connecting pipeline, and the oxygen-enriched gas mixer 9 is used to mix air and low-concentration oxygen-enriched gas to ensure the uniform and stable composition of the mixed gas.

[0032] The pressure equalizing and noise reducing collection box 1 is connected to the exhaust gas outlet of the nitrogen generator. The pulsed low-concentration oxygen-enriched gas generated by the nitrogen generator enters the interior of the primary buffer gas storage tank 3 through the pressure equalizing and noise reducing collection box 1 and the connecting pipeline. The gas inside the primary buffer gas storage tank 3 enters the secondary buffer gas storage tank 7 through the pressure regulating and flow stabilizing component 4, the oxygen-enriched gas booster 5 and the connecting pipeline. The gas inside the secondary buffer gas storage tank 7 is discharged outward through the valve assembly 8, the oxygen-enriched gas mixer 9 and the application-side blower 10, so as to realize the effective and stable collection of pulsed low-concentration oxygen-enriched exhaust gas.

[0033] The pressure equalizing and noise reducing collection box 1 can avoid the local high pressure at the low-concentration oxygen-enriched gas discharge port caused by pulsed air pressure, ensure the normal discharge of pulsed low-concentration oxygen-enriched gas, and thus ensure that it does not affect the purity of nitrogen produced by the pressure swing adsorption nitrogen generator.

[0034] Both the oxygen-enriched gas booster 5 and the application-side blower 10 are equipped with frequency converters. The oxygen-enriched gas booster 5 can be configured according to different actual working conditions, and when the oxygen-enriched gas booster 5 operates and the pressure equalizing and noise reducing collection box 1 starts to collect pulsed low-concentration oxygen-enriched gas, it is in a negative pressure state.

[0035] The valve assembly 8 is used to adjust the usage amount of air and low-concentration oxygen-enriched gas to avoid affecting the total air volume on the application side.

[0036] The primary buffer gas storage tank 3 and the secondary buffer gas storage tank 7 are respectively equipped with a first automatic protection system 2 and a second automatic protection system 6. When the pressure of the gas storage tank system rises to the alarm value or the pressure of the gas storage tank system drops to the alarm value, the pressure control system control valve assembly automatically opens to discharge the low-concentration oxygen-enriched gas to the outside or allow air to enter the gas storage tank system from the valve assembly, protecting the safe and stable operation of the nitrogen generator system. The storage space of the buffer gas storage tank can be configured according to the amount of pulsed low-concentration oxygen-enriched gas generated by the pressure swing adsorption nitrogen generator.

[0037] This set of devices for collecting pulsed low-concentration oxygen-rich gas from nitrogen generators can efficiently recover oxygen-rich gas with a recovery rate of up to 100%, achieving full recovery of waste gas, and can ensure the safe and stable operation of pressure swing adsorption nitrogen generators without affecting the nitrogen purity. At the same time, the pressure and flow of the oxygen-rich gas at the application end are stable, providing technical support for the utilization of oxygen-rich gas at the application end, putting an end to the current situation of waste discharge of pulsed oxygen-rich gas from pressure swing adsorption nitrogen generators, realizing comprehensive and efficient utilization of resources, and helping industrial boilers and industrial kilns achieve cost reduction, efficiency increase, energy conservation, and carbon reduction goals.

[0038] Example Two:

[0039] Please refer to Figure 1 as shown, a device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator, comprising:

[0040] A pressure equalizing and noise reducing collection tank 1, the pressure equalizing and noise reducing collection tank 1 is connected to pulsed low-concentration oxygen-rich gas, and the internal pressure value of the pressure equalizing and noise reducing collection tank 1 is quickly evenly distributed;

[0041] A primary buffer gas storage tank 3, the primary buffer gas storage tank 3 is connected to the pressure equalizing and noise reducing collection tank 1 through a pipeline, and a first automatic protection system 2 is arranged on the connecting pipeline;

[0042] An oxygen-rich gas booster 5, the oxygen-rich gas booster 5 is connected to the primary buffer gas storage tank 3 through a pipeline, and a pressure regulating and flow stabilizing component 4 is arranged on the connecting pipeline, and the pressure regulating and flow stabilizing component 4 is used to stabilize the pressure and flow of oxygen-rich gas in the pipeline system;

[0043] A secondary buffer gas storage tank 7, the secondary buffer gas storage tank 7 is connected to the oxygen-rich gas booster 5 through a pipeline, and a second automatic protection system 6 is arranged on the connecting pipeline;

[0044] An application end blower 10, the application end blower 10 is connected to the secondary buffer gas storage tank 7 through a pipeline, and a valve assembly 8 and an oxygen-rich gas mixer 9 are arranged on the connecting pipeline, and the oxygen-rich gas mixer 9 is used to mix air and low-concentration oxygen-rich gas to ensure the uniform and stable composition of the mixed gas.

[0045] The pressure equalizing and noise reducing collection tank 1 is connected to the waste gas discharge port of the nitrogen generator, and the pulsed low-concentration oxygen-rich gas generated by the nitrogen generator enters the primary buffer gas storage tank 3 through the pressure equalizing and noise reducing collection tank 1 and the connecting pipeline. The gas inside the primary buffer gas storage tank 3 enters the secondary buffer gas storage tank 7 through the pressure regulating and flow stabilizing component 4, the oxygen-rich gas booster 5 and the connecting pipeline. The gas inside the secondary buffer gas storage tank 7 is discharged outward through the valve assembly 8, the oxygen-rich gas mixer 9 and the application end blower 10, so as to effectively and stably collect pulsed low-concentration oxygen-rich waste gas.

[0046] The pressure equalizing and noise reducing collection box 1 can avoid the local high pressure at the low-concentration oxygen-rich gas discharge port caused by pulsed air pressure, which affects the normal discharge of pulsed low-concentration oxygen-rich gas, so as to ensure that the purity of nitrogen produced by the pressure swing adsorption nitrogen generator is not affected.

[0047] Both the oxygen-rich gas booster 5 and the application-side blower 10 are equipped with frequency converters. The booster can be configured according to different actual working conditions, and when the booster operates and the pressure equalizing and noise reducing collection box 1 starts to collect pulsed low-concentration oxygen-rich gas, it is in a negative pressure state.

[0048] The valve assembly 8 is used to adjust the amount of air and low-concentration oxygen-rich gas to avoid affecting the total air volume at the application side.

[0049] The first-stage buffer gas storage tank 3 and the second-stage buffer gas storage tank 7 are respectively equipped with the first automatic protection system 2 and the second automatic protection system 6. When the pressure of the gas storage tank system rises to the alarm value or the pressure of the gas storage tank system drops to the alarm value, the pressure control system control valve assembly automatically opens to discharge the low-concentration oxygen-rich gas to the outside or allow air to enter the gas storage tank system from the valve assembly, protecting the safe and stable operation of the nitrogen generator system. The storage space of the buffer gas storage tank can be configured according to the amount of pulsed low-concentration oxygen-rich gas generated by the pressure swing adsorption nitrogen generator.

[0050] The device for collecting pulsed low-concentration oxygen-rich gas from the nitrogen generator is equipped with a PLC control system and a DCS control system to monitor the start and stop of the nitrogen generator, the oxygen-rich gas booster 5 and the application-side blower 10, ensuring that the total air volume at the application side meets the requirements.

[0051] This set of devices for collecting pulsed low-concentration oxygen-rich gas from the nitrogen generator can efficiently recover oxygen-rich gas, with a recovery rate of up to 100%, realizing the full recovery of waste gas, and can ensure the safe and stable operation of the pressure swing adsorption nitrogen generator without affecting the nitrogen purity. At the same time, the pressure and flow of the oxygen-rich gas at the application side are stable, providing technical support for the utilization of oxygen-rich gas at the application side, putting an end to the current situation of waste discharge of pulsed oxygen-rich gas from the pressure swing adsorption nitrogen generator, realizing the comprehensive and efficient utilization of resources, and helping industrial boilers and industrial kilns achieve cost reduction, efficiency increase, energy conservation and carbon reduction goals.

[0052] Embodiment 3:

[0053] Please refer to Figure 1 As shown, a device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator includes:

[0054] A pressure equalizing and noise reducing collection box 1, the pressure equalizing and noise reducing collection box 1 is connected to pulsed low-concentration oxygen-rich gas, and the internal pressure value of the pressure equalizing and noise reducing collection box 1 is quickly evenly distributed;

[0055] A first-stage buffer gas storage tank 3, the first-stage buffer gas storage tank 3 is connected to the pressure equalizing and noise reducing collection box 1 through a pipeline, and a first automatic protection system 2 is arranged on the connecting pipeline;

[0056] The oxygen-enriched gas booster 5 is connected to the first-stage buffer gas storage tank 3 through a pipeline, and a pressure regulating and flow stabilizing component 4 is arranged on the connecting pipeline. The pressure regulating and flow stabilizing component 4 is used to stabilize the pressure and flow rate of the oxygen-enriched gas in the pipeline system.

[0057] The second-stage buffer gas storage tank 7 is connected to the oxygen-enriched gas booster 5 through a pipeline, and a second automatic protection system 6 is arranged on the connecting pipeline.

[0058] The application-side blower 10 is connected to the second-stage buffer gas storage tank 7 through a pipeline, and a valve component 8 and an oxygen-enriched gas mixer 9 are arranged on the connecting pipeline. The oxygen-enriched gas mixer 9 is used to mix air and low-concentration oxygen-enriched gas to ensure the uniform and stable composition of the mixed gas.

[0059] The pressure equalizing and noise reducing collection box 1 is connected to the exhaust gas outlet of the nitrogen generator. The pulsed low-concentration oxygen-enriched gas generated by the nitrogen generator enters the interior of the first-stage buffer gas storage tank 3 through the pressure equalizing and noise reducing collection box 1 and the connecting pipeline. The gas inside the first-stage buffer gas storage tank 3 enters the second-stage buffer gas storage tank 7 through the pressure regulating and flow stabilizing component 4, the oxygen-enriched gas booster 5 and the connecting pipeline. The gas inside the second-stage buffer gas storage tank 7 is discharged outward through the valve component 8, the oxygen-enriched gas mixer 9 and the application-side blower 10, thereby realizing the effective and stable collection of the pulsed low-concentration oxygen-enriched waste gas.

[0060] The pressure equalizing and noise reducing collection box 1 can avoid the local high pressure at the low-concentration oxygen-enriched gas discharge port caused by the pulsed air pressure, which affects the normal discharge of the pulsed low-concentration oxygen-enriched gas, thereby ensuring that it does not affect the purity of the nitrogen produced by the pressure swing adsorption nitrogen generator.

[0061] Both the oxygen-enriched gas booster 5 and the application-side blower 10 are equipped with frequency converters. The booster can be configured according to different actual working conditions, and when the booster operates and the pressure equalizing and noise reducing collection box 1 starts to collect the pulsed low-concentration oxygen-enriched gas, it is in a negative pressure state.

[0062] The valve component 8 is used to adjust the consumption of air and low-concentration oxygen-enriched gas to avoid affecting the total air volume on the application side.

[0063] The first-stage buffer gas storage tank 3 and the second-stage buffer gas storage tank 7 are respectively equipped with a first automatic protection system 2 and a second automatic protection system 6. When the pressure of the gas storage tank system rises to the alarm value or the pressure of the gas storage tank system drops to the alarm value, the pressure control system control valve component automatically opens to discharge the low-concentration oxygen-enriched gas to the outside or allow air to enter the gas storage tank system from the valve component, protecting the safe and stable operation of the nitrogen generator system. The storage space of the buffer gas storage tank can be configured according to the amount of pulsed low-concentration oxygen-enriched gas generated by the pressure swing adsorption nitrogen generator.

[0064] The device for collecting pulsed low-concentration oxygen-enriched gas of a nitrogen generator is configured with a PLC control system and a DCS control system to monitor the startup and shutdown of the nitrogen generator, the oxygen-enriched gas booster 5, and the blower 10 at the application end, ensuring that the total air volume at the application end meets the requirements.

[0065] When configuring the equalizing and noise-reducing collection box 1, it is calculated based on the aspect ratio, noise decibel number, and the emission volume of pulsed low-concentration oxygen-enriched gas, etc. When configuring the storage tank, it is calculated based on the influence range of the buffer storage volume on the pulsed pressure. When setting the protection parameters of the entire device, it is determined by the pressure relief pressure of pulsed low-concentration oxygen-enriched gas, gas volume, conveying capacity, and storage volume, etc. When configuring the oxygen-enriched gas booster 5, it is determined by the air inlet mode, conveying distance, and total air volume, etc. When configuring the pressure-regulating and flow-stabilizing component 4, it is determined by the pressure fluctuation range of oxygen-enriched gas and the gas supply pressure requirement. When configuring the oxygen-enriched gas mixer 9, it is determined by the air volume of oxygen-enriched gas, total air volume, and gas supply pressure.

[0066] This set of devices for collecting pulsed low-concentration oxygen-enriched gas of a nitrogen generator can efficiently recover oxygen-enriched gas, with a recovery rate of up to 100%, achieving the full recovery of oxygen-enriched gas, and can ensure the safe and stable operation of the pressure swing adsorption nitrogen generator without affecting the nitrogen purity. At the same time, the pressure and flow of the oxygen-enriched gas at the application end are stable, providing technical support for the utilization of oxygen-enriched gas at the application end, putting an end to the current situation of waste discharge of pulsed oxygen-enriched gas from the pressure swing adsorption nitrogen generator, realizing the comprehensive and efficient utilization of resources, and helping industrial boilers and industrial kilns achieve the goals of cost reduction, efficiency increase, energy conservation, and carbon reduction.

[0067] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0068] In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

Claims

1. A device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator, characterized in that: include: A pressure-equalizing noise-reducing collecting box (1), wherein the pressure-equalizing noise-reducing collecting box (1) is connected to a pulsed low-concentration oxygen-rich gas; A primary buffer gas storage tank (3), wherein the primary buffer gas storage tank (3) is connected to the pressure-equalizing and noise-reducing collecting box (1) via a pipeline, and a first automatic protection system (2) is provided on the connecting pipeline; An oxygen-rich gas booster (5), the oxygen-rich gas booster (5) being connected to a primary buffer gas storage tank (3) via a pipeline, and a pressure regulating and flow stabilizing component (4) being provided on the connecting pipeline; A secondary buffer gas storage tank (7), wherein the secondary buffer gas storage tank (7) is connected to the oxygen-enriched gas booster (5) via a pipeline, and a second automatic protection system (6) is provided on the connecting pipeline; An application end blower (10) is connected to a secondary buffer gas storage tank (7) via a pipeline, and a valve assembly (8) and an oxygen-enriched mixer (9) are provided on the connecting pipeline.

2. The device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator according to claim 1, characterized in that: The internal pressure value of the pressure-equalizing and noise-reducing collecting box (1) is quickly and evenly distributed.

3. A device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator according to claim 2, characterized in that: The oxygen-rich gas booster (5) and the application-end blower (10) are both equipped with frequency converters, and the booster is operated so that the pressure-equalizing and noise-reducing collection box (1) is in a negative pressure state when it starts to collect pulsed low-concentration oxygen-rich gas.

4. The device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator according to claim 3, characterized in that: The pressure regulating and flow stabilizing component (4) is used to stabilize the pressure and flow of the oxygen-rich gas in the pipeline system.

5. The device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator according to claim 4, characterized in that: The oxygen-enriched mixer (9) is used to mix air and low-concentration oxygen-enriched gas to ensure that the composition of the mixed gas is uniform and stable.

6. The device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator according to claim 1, characterized in that: The first automatic protection system (2), the second automatic protection system (6) and the valve assembly (8) are all used to adjust the amount of air and low-concentration oxygen-rich gas.

7. The device for collecting pulsed low-concentration oxygen-rich gas from a nitrogen generator according to claim 6, characterized in that: The first-level buffer gas storage tank (3) and the second-level buffer gas storage tank (7) are respectively equipped with a first automatic protection system (2) and a second automatic protection system (6) for ensuring safe and stable operation of the nitrogen generator. When the pressure of the gas storage tank system rises to an alarm value or the pressure of the gas storage tank system drops to an alarm value, the protection system control valve assembly (8) automatically opens to discharge the low-concentration oxygen-rich gas to the outside or allows air to enter the gas storage tank system from the valve assembly (8).

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