A standby nitrogen generation system for nitrogen

Abstract

The utility model discloses a kind of standby nitrogen generation system of nitrogen, including control end, air compressor, air storage tank, cold dryer, air transfer tank, molecular nitrogen generator and nitrogen output pipeline, the air compressor, air storage tank, cold dryer, air transfer tank, molecular nitrogen generator are sequentially communicated by pipeline, the output end of molecular nitrogen generator is communicated nitrogen buffer tank, nitrogen output pipeline is installed on nitrogen buffer tank.The nitrogen generation system of standby nitrogen of this, by increasing buffer pipe steady nitrogen pressure, make its output uniform, simultaneously according to pipeline setting, when it is excessive in nitrogen generation, pressure is released to nitrogen storage tank and is stored, balance the pressure in nitrogen buffer tank, can be mutually cooperative operation under nitrogen reserve use and nitrogen preparation use two modes.

Description

Technical Field

[0001] This utility model relates to the technical field of nitrogen storage and backup nitrogen generation device, specifically a backup nitrogen generation system. Background Technology

[0002] Nitrogen is a colorless and odorless gas. At room temperature and pressure, it is chemically inert and does not readily react with other substances. Nitrogen is an important raw material for synthesizing chemical products such as ammonia and nitric acid. In the food industry, nitrogen is commonly used in food packaging to prevent oxidation and spoilage, extending shelf life. In the metal processing industry, nitrogen serves as a protective gas to prevent metal oxidation during heating. Under certain conditions, nitrogen can also exhibit oxidizing or reducing properties. For example, under high temperature, high pressure, and the action of a catalyst, nitrogen can react with hydrogen to produce ammonia, exhibiting oxidizing properties; nitrogen can react with oxygen under discharge conditions to produce nitric oxide, exhibiting reducing properties. The nitrogen molecule is composed of two nitrogen atoms bonded by a triple bond, resulting in a stable molecular structure. Breaking this bond requires high energy. Therefore, nitrogen is chemically inert at room temperature and pressure, making it widely used in industrial applications.

[0003] As the demand for nitrogen fluctuates, so does its price. Purchasing and producing nitrogen are usually used selectively based on market conditions. However, the current equipment operates under two separate nitrogen usage modes that cannot interact with each other. Purchased nitrogen is stored in a storage tank. When the storage tank becomes insufficient, the system switches directly to the nitrogen generator by closing the storage tank valve. Furthermore, when there is excess nitrogen or a shortage of nitrogen in the storage tank, the excess nitrogen cannot be stored in the storage tank. Therefore, this application is made. Utility Model Content

[0004] The purpose of this invention is to provide a backup nitrogen generation system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A nitrogen backup nitrogen generation system includes a control terminal, an air compressor, an air storage tank, a refrigerated dryer, an air transfer tank, a molecular nitrogen generator, and a nitrogen output pipeline. The air compressor, air storage tank, refrigerated dryer, air transfer tank, and molecular nitrogen generator are sequentially connected by pipelines. The output end of the molecular nitrogen generator is connected to a nitrogen buffer tank. A nitrogen output pipeline is installed on the nitrogen buffer tank. The nitrogen buffer tank is also connected to a nitrogen storage tank through an excess pipeline. A nitrogen output branch pipe connected to the nitrogen output pipeline is provided on the nitrogen storage tank.

[0006] As a further embodiment of this utility model: valve a is provided on the excess pipeline, valve b is provided on the nitrogen output pipeline, and valve c is provided on the nitrogen output branch pipe.

[0007] As a further improvement of this utility model, valves a, b, and c are all controlled by a control terminal.

[0008] As a further embodiment of this utility model: an outer shell is provided on the outside of the nitrogen storage tank, and an interlayer is formed between the nitrogen storage tank and the shell. The interlayer stores heavy phase gas, and the interlayer is also connected to an inlet pipeline extending to the outside for injecting heavy phase gas.

[0009] As a further improvement of this utility model: a nitrogen sensor is provided in the interlayer, and the nitrogen sensor is electrically connected to the control terminal. The control terminal controls valve a and valve c through the electrical signal transmitted by the nitrogen sensor.

[0010] As a further improvement of this utility model: a gas pump controlled by a control terminal is provided on the nitrogen output branch pipe, and the control terminal controls the gas pump through an electrical signal transmitted by a nitrogen sensor.

[0011] As a further improvement of this utility model: a pressure sensor is installed inside the nitrogen buffer tank. The pressure sensor is connected to the control terminal via an electrical signal, and the control terminal controls valve a through the electrical signal transmitted by the pressure sensor.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The backup nitrogen generation system stabilizes nitrogen pressure by adding a buffer tube, ensuring uniform output. It also releases excess nitrogen into a nitrogen storage tank for storage when there is excess nitrogen production, balancing the pressure inside the nitrogen buffer tank. It can operate in both nitrogen storage and nitrogen generation modes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a standby nitrogen generation system.

[0014] In the diagram: 1. Air compressor; 2. Air storage tank; 3. Refrigerated dryer; 4. Air transfer tank; 5. Molecular nitrogen generator; 6. Nitrogen buffer tank; 7. Nitrogen storage tank; 8. Shell; 9. Valve a; 10. Valve b; 11. Excess line; 12. Nitrogen output line; 13. Nitrogen output branch pipe; 14. Electrically controlled air pump; 15. Valve c; 16. Pressure sensor; 17. Nitrogen sensor; 18. Multi-stage filtration device; 19. Primary filtration device; 20. Nitrogen input line. Detailed Implementation

[0015] Please see Figure 1In this embodiment of the invention, a backup nitrogen generation system includes a control terminal, an air compressor 1, an air storage tank 2, a refrigerated dryer 3, an air transfer tank 4, a molecular nitrogen generator 5, and a nitrogen output pipeline 12. The air compressor 1, air storage tank 2, refrigerated dryer 3, air transfer tank 4, and molecular nitrogen generator 5 are sequentially connected via pipelines. The output end of the molecular nitrogen generator 5 is connected to a nitrogen buffer tank 6. The nitrogen buffer tank 6 is equipped with the nitrogen output pipeline 12. The nitrogen buffer tank 6 is also connected to a nitrogen storage tank 7 via an excess pipeline 11. The nitrogen storage tank 7 is equipped with a nitrogen output branch pipe 13 connected to the nitrogen output pipeline 12. The air is compressed by the air compressor 1, and the air passes through a primary filter 19 to pre-filter dust particles. The compression generates a portion of the nitrogen. Condensate and humid air enter the refrigerated dryer 3 for drying, and then undergo fine filtration through a multi-stage filtration device 18. The remaining oxygen, nitrogen, and other gases enter the air transfer tank 4 together. The gases then enter the molecular nitrogen generator 5 equipped with molecular sieves for separation. The separated nitrogen enters the nitrogen buffer tank 6. After passing through the nitrogen buffer tank 6, the gas pressure becomes stable and can be evenly output from the excess pipeline 11 or the nitrogen output pipeline 12. When the gas pressure in the nitrogen buffer tank 6 is on the rise, it indicates that the nitrogen production efficiency is greater than the consumption. Therefore, the high-pressure nitrogen is transported from the excess pipeline 11 to the relatively low-pressure nitrogen storage tank 7 for standby. The nitrogen storage tank 7 is used for temporary storage, forming a system that combines nitrogen production and storage.

[0016] In a preferred embodiment, valve a9 is installed on excess pipeline 11, valve b10 is installed on nitrogen output pipeline 12, and valve c15 is installed on nitrogen output branch pipe 13. Valves a9, b10, and c15 are all controlled by a control terminal, which can be a DCS system.

[0017] In a preferred embodiment, an outer shell 8 is provided on the outside of the nitrogen storage tank 7, forming a sandwich between the nitrogen storage tank 7 and the shell 8. The sandwich stores heavy phase gas, and the sandwich is also connected to an inlet pipe extending to the outside for injecting heavy phase gas. The nitrogen tank has good sealing measures, but gas leakage may still occur. Leakage will not only lead to the loss of nitrogen, but may also create a nitrogen-rich environment in a local area, posing a risk of asphyxiation. If there is a source of ignition, it may also cause other safety problems. Therefore, it is set as a jacket structure, storing heavy phase gas inside. The heavy phase gas can be carbon dioxide or argon, which has the advantages of not reacting and mixing with nitrogen and having a density greater than nitrogen. Therefore, the nitrogen will gather upward to the vicinity of the nitrogen sensor 17, so that the nitrogen sensor 17 can detect the equipment leak as soon as possible and accept the investigation.

[0018] In a preferred embodiment, a nitrogen sensor 17 is installed in the interlayer. The nitrogen sensor 17 is electrically connected to the control terminal. The control terminal controls valves a9 and c15 through the electrical signal transmitted by the nitrogen sensor 17. A gas pump 14 controlled by the control terminal is installed on the nitrogen output branch pipe 13. The control terminal controls the gas pump 14 through the electrical signal transmitted by the nitrogen sensor 17. When the nitrogen sensor 17 detects a nitrogen leak, the gas pump 14 operates, prioritizing the output of nitrogen from the nitrogen storage tank 7. At the same time, valve a9 is closed, and static nitrogen is input into the nitrogen storage tank 7. After the nitrogen is exhausted, maintenance is performed. The nitrogen generation system operates independently to supply nitrogen.

[0019] In a preferred embodiment, a pressure sensor 16 is installed inside the nitrogen buffer tank 6. The pressure sensor 16 is electrically connected to the control terminal. The control terminal controls valve a9 through the electrical signal transmitted by the pressure sensor 16. When nitrogen is mainly obtained from purchased channels, nitrogen is injected into the nitrogen storage tank 7 through the nitrogen input pipeline 20. After the nitrogen in the nitrogen storage tank 7 is used up, the internal pressure becomes low, and the nitrogen generation system is activated. The nitrogen output pipeline 12 of the nitrogen generation system adjusts the nitrogen consumption by adjusting the opening degree. When there is excess nitrogen production, the pressure in the nitrogen buffer tank 6 increases. The pressure sensor 16 sets a range value. When the pressure reaches the peak value, the control terminal controls valve a9 to open to a certain degree. At this time, the pressure in the nitrogen storage tank 7 is less than the pressure in the nitrogen buffer tank 6. Therefore, after valve a9 is opened, nitrogen in the nitrogen buffer tank 6 will automatically flow into the nitrogen storage tank 7, forming an automatic nitrogen storage function.

[0020] It should be noted that all the above embodiments belong to the same utility model concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not detailed, please refer to the description in other embodiments.

[0021] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A nitrogen backup nitrogen generation system, comprising a control terminal, an air compressor (1), an air storage tank (2), a refrigerated dryer (3), an air transfer tank (4), a molecular nitrogen generator (5), and a nitrogen output pipeline (12), wherein the air compressor (1), air storage tank (2), refrigerated dryer (3), air transfer tank (4), and molecular nitrogen generator (5) are sequentially connected via pipelines, characterized in that, The output end of the molecular nitrogen generator (5) is connected to the nitrogen buffer tank (6), and a nitrogen output pipeline (12) is installed on the nitrogen buffer tank (6). The nitrogen buffer tank (6) is also connected to a nitrogen storage tank (7) through an excess pipeline (11). A nitrogen output branch pipe (13) connected to the nitrogen output pipeline (12) is provided on the nitrogen storage tank (7).

2. The nitrogen standby nitrogen generation system according to claim 1, characterized in that, The excess pipeline (11) is equipped with valve a (9), the nitrogen output pipeline (12) is equipped with valve b (10), and the nitrogen output branch pipe (13) is equipped with valve c (15).

3. A standby nitrogen generation system for nitrogen according to claim 2, characterized in that, Valve a (9), valve b (10) and valve c (15) are all controlled by a control terminal.

4. A standby nitrogen generation system for nitrogen according to claim 3, characterized in that, The nitrogen storage tank (7) is also provided with an outer shell (8) on the outside. An interlayer is formed between the nitrogen storage tank (7) and the shell (8). The interlayer stores heavy phase gas and is also connected to an inlet pipeline that extends to the outside for injecting heavy phase gas.

5. A standby nitrogen generation system for nitrogen according to claim 4, characterized in that, A nitrogen sensor (17) is installed in the interlayer. The nitrogen sensor (17) is connected to the control terminal via an electrical signal. The control terminal controls valve a (9) and valve c (15) via the electrical signal transmitted by the nitrogen sensor (17).

6. A standby nitrogen generation system for nitrogen according to claim 4, characterized in that, The nitrogen output branch pipe (13) is equipped with a gas pump (14) controlled by a control terminal. The control terminal controls the gas pump (14) through an electrical signal transmitted by a nitrogen sensor (17).

7. A standby nitrogen generation system according to any one of claims 1-6, characterized in that, The nitrogen buffer tank (6) is equipped with a pressure sensor (16). The pressure sensor (16) is connected to the control terminal via an electrical signal. The control terminal controls valve a (9) via the electrical signal transmitted by the pressure sensor (16).

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