A gas recovery system and a gas production plant

Abstract

The utility model discloses a kind of gas recovery system and gas production equipment, it is related to industrial gas recovery technical field, the gas recovery system includes: first gas tank, its inside storage has industrial gas;Connector, with first gas tank intercommunication, connector is equipped with first gas outlet and second gas outlet;Analysis equipment, with first gas outlet is communicated by pipeline, analysis equipment is used to carry out component detection to the gas spouted by first gas outlet;Gas preparation component, with second gas outlet is communicated by pipeline, gas preparation component is used to recycle residual gas in connector.This application provides a kind of gas recovery system and gas production equipment, by first gas outlet, gas can be passed into analysis equipment and carry out gas component detection, residual gas in connector can be passed into gas preparation component by second gas outlet, avoid discharging gas to air.

Description

Technical Field

[0001] This utility model relates to the field of industrial gas recovery technology, and more specifically, to a gas recovery system. Furthermore, this utility model also relates to a gas production device including the aforementioned gas recovery system. Background Technology

[0002] SF6 (sulfur hexafluoride) and CF4 (carbon tetrafluoride) are both highly potent industrial gases widely used in the industrial sector. Their global warming potential (GWP) is extremely high, approximately thousands to tens of thousands of times that of carbon dioxide, posing a significant potential impact on climate change. Therefore, the recycling, purification, and reuse of these gases have become crucial technological pathways for reducing industrial gas emissions, promoting a green circular economy, and contributing to the achievement of carbon neutrality goals.

[0003] In the production, recovery, or reuse of such gases, quality analysis and testing before shipment are crucial for ensuring gas purity and application safety. The standard testing procedure typically involves releasing the gas from the storage tank and then transporting it via main pipeline to precision analytical equipment such as chromatographs, mass spectrometers, or spectrometers for component and purity determination. However, in practice, it has been found that joints and valves connecting the storage tank and pipelines can easily retain residual air (oxygen, nitrogen, etc.), moisture, particulate matter, or other impurities due to loading / unloading and exposure to the atmosphere. If this initial gas flow enters the analytical system directly without treatment, it will severely interfere with the detection signal, causing the measurement results to deviate from the true value, thus affecting the accurate assessment of gas quality.

[0004] To address this issue, the industry currently employs a "venting" procedure—releasing and venting a portion of the gas before formal sampling and analysis. This airflow flushes the pipes and connectors to remove residual impurities, and the remaining gas is then introduced into the analytical equipment once the airflow stabilizes. While this method effectively improves detection accuracy, it brings significant negative environmental and economic consequences: the SF6 or CF4 gases emitted directly into the atmosphere during venting, due to their extremely high GWP (Global Warming Potential), exacerbate the greenhouse effect. Furthermore, these gases themselves have usability or recycling value, making their release a waste of resources, especially when gas costs are high or supply is limited.

[0005] In summary, how to reduce or even eliminate direct gas emissions during the venting process while ensuring detection accuracy is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a gas recovery system in which industrial gas in the first gas storage tank can be introduced into an analysis device for component detection from the first gas outlet, and residual gas in the connector can be introduced into a gas preparation component to avoid direct emission into the air.

[0007] Another objective of this invention is to provide a gas production device that includes the aforementioned gas recovery system.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A gas recovery system, comprising:

[0010] The first gas storage tank contains industrial gases;

[0011] A connector is connected to the first gas storage tank, and the connector is provided with a first gas outlet and a second gas outlet;

[0012] An analytical device is connected to the first gas outlet via a pipeline, and the analytical device is used to detect the composition of the gas ejected from the first gas outlet.

[0013] A gas preparation component is connected to the second gas outlet via a pipe, and the gas preparation component is used to recover residual gas in the connector.

[0014] Preferably, the analytical device includes an air analyzer and a moisture analyzer, the air analyzer and the moisture analyzer being connected to the first port and the second port of a three-way valve respectively via pipes, and the third port of the three-way valve being connected to the first air outlet via a pipe.

[0015] Preferably, a pressure regulating element is provided between the three-way valve and the first air outlet.

[0016] Preferably, the system further includes a second gas storage tank, which is connected to the gas preparation assembly via the connector, and is also connected to a pressurization device.

[0017] Preferably, the pipe between the connector of the second gas storage tank and the gas preparation component is equipped with a purification component.

[0018] Preferably, it further includes a detection component, which is detachably connected to the second gas storage tank. The probe portion of the detection component is located inside the second gas storage tank and is used to detect the amount of residual gas inside the second gas storage tank.

[0019] Preferably, the system further includes a third gas storage tank, which is connected to the gas preparation assembly, and the gas preparation assembly is used to introduce industrial gas into the third gas storage tank.

[0020] Preferably, the bottom of the third gas storage tank is provided with a corresponding weighing component, which is used to weigh the third gas storage tank.

[0021] Preferably, the first air outlet is located on the side of the connector away from the first air tank, and the second air outlet is located between the first air outlet and the first air tank.

[0022] A gas production device includes a gas recovery system, wherein the gas recovery system is any one of the gas recovery systems described above.

[0023] This utility model provides a gas recovery system. A first gas storage tank is equipped with a connector, which has a first gas outlet and a second gas outlet. The first gas outlet is connected to an analytical device through a pipeline, and the second gas outlet is connected to a gas preparation component through a pipeline. Industrial gas in the first gas storage tank can be discharged from the first gas outlet of the connector and introduced into the analytical device for sample analysis. After the sample analysis is completed, since there is residual industrial gas in the connector, the residual gas can be recycled into the gas preparation component through the second gas outlet. This avoids direct emission into the atmosphere and prevents negative impacts. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the gas recovery system provided by this utility model.

[0026] Figure label:

[0027] 1-First gas storage tank; 2-Connector; 3-First gas outlet; 4-Second gas outlet; 5-Analytical equipment; 6-Gas preparation component; 7-Air analysis equipment; 8-Moisture analysis equipment; 9-Three-way valve; 10-Pressure regulating element; 11-Second gas storage tank; 12-Pressure pressurization equipment; 13-Purification component; 14-Third gas storage tank; 15-Weighing component. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The core of this invention is to provide a gas recovery system that can not only detect the composition of industrial gas discharged from the first gas storage tank, but also allow residual gas in the connector to be discharged into the gas preparation component for recovery, thus preventing it from being released into the atmosphere.

[0030] Another core aspect of this invention is to provide a gas production device that includes the aforementioned gas recovery system.

[0031] It should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating the description of this application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] This application provides a gas recovery system, comprising: a first gas storage tank 1, a connector 2, an analysis device 5, and a gas preparation component 6;

[0033] The first gas storage tank 1 contains industrial gas.

[0034] Connector 2 is connected to the first gas storage tank 1, and connector 2 is provided with a first gas outlet 3 and a second gas outlet 4;

[0035] The analytical device 5 is connected to the first gas outlet 3 via a pipeline, and the analytical device 5 is used to detect the composition of the gas ejected from the first gas outlet 3.

[0036] The gas preparation component 6 is connected to the second gas outlet 4 through a pipeline. The gas preparation component 6 is used to recover residual gas in the connector 2.

[0037] For details, please refer to the appendix. Figure 1The first gas storage tank 1 contains industrial gas, typically refined SF6 or CF4, referred to as gas or industrial gas in the following description. A connector 2 is located at the upper end of the first gas storage tank 1, communicating with the inner cavity of the first gas storage tank 1. The connector 2 has a first gas outlet 3 and a second gas outlet 4. The first gas outlet 3 is connected to the analysis equipment 5 via a pipe, and the second gas outlet 4 is connected to the gas preparation component 6 via a pipe. When gas composition detection is required, the gas from the first gas storage tank 1 can be passed through the first gas outlet 3 into the analysis equipment 5 for composition detection. Before detection, a certain amount of gas will remain in the connector 2. Industrial gases, if directly released into the atmosphere, would have a negative impact on the environment. Therefore, before conducting gas composition detection, industrial gases are discharged through the first gas storage tank 1, allowing the residual gas in the connector 2 to be introduced into the gas preparation component 6 through the second gas outlet 4. The gas preparation component 6 can recycle the residual gas in the connector 2, preventing it from being directly released into the atmosphere. This avoids the release of industrial gases into the atmosphere, making it more environmentally friendly and preventing negative impacts on the environment. After the venting is completed, the gas in the first gas storage tank 1 is then introduced into the analysis device 5 through the first gas outlet 3 for composition detection to ensure the accuracy of the detection results.

[0038] Based on the above embodiments, the analysis device 5 includes an air analysis device 7 and a moisture analysis device 8. The air analysis device 7 and the moisture analysis device 8 are respectively connected to the first port and the second port of the three-way valve 9 through pipes. The third port of the three-way valve 9 is connected to the first air outlet 3 through a pipe.

[0039] Specifically, the analysis equipment 5 is divided into air analysis equipment 7 and moisture analysis equipment 8. The core reason for analyzing and detecting them separately is that they have unique effects on the quality of the target gas, detection accuracy, and downstream application safety. Moreover, their detection principles and control standards are fundamentally different from other impurities and cannot be covered by a single detection link. The three ports of the three-way valve 9 are connected to the connector 2, air analysis equipment 7, and moisture analysis equipment 8, respectively. When air analysis is required, the upper and left ends of the three-way valve 9 should be opened simultaneously. When moisture analysis is required, the left and right ends of the three-way valve 9 should be opened simultaneously, which is convenient for adjustment.

[0040] Based on the above embodiment, a pressure regulating element 10 is provided between the three-way valve 9 and the first air outlet 3.

[0041] Specifically, a pressure regulating element 10 is installed on the pipeline between the first gas storage tank 1 and the analysis device 5, the purpose of which is to adjust the gas pressure / flow rate entering the analysis device 5, thereby meeting the detection conditions of the analysis device 5.

[0042] Based on the above embodiments, a second gas storage tank 11 is also included. The second gas storage tank 11 is connected to the gas preparation component 6 through the connector 2, and the second gas storage tank 11 is also connected to the pressurization device 12.

[0043] Specifically, the upper end of the second gas storage tank 11 is also provided with a connector 2, and the connector 2 is connected to the inner cavity of the second gas storage tank 11. The connector 2 on the second gas storage tank 11 also has two air outlets, or air inlets. One of them is used to connect with the gas preparation component 6, and the other air outlet is used to connect with the pressurizing device 12. In the actual sales process, the used second gas storage tanks 11 will be recycled. Usually, there is residual gas in these second gas storage tanks 11. This residual gas may be contaminated during use. Therefore, only after this gas is discharged can new gas be added to these second gas storage tanks 11. Generally speaking, the second gas storage tank 11 is pressurized by the pressurizing device 12 to discharge the residual gas, and the residual gas is discharged into the gas preparation component 6 through the pipeline for reprocessing.

[0044] Based on the above embodiment, a purification component 13 is provided in the pipeline between the connector 2 of the second gas storage tank 11 and the gas preparation component 6.

[0045] Specifically, a purification component 13 is provided between the gas preparation component 6 and the connector 2 of the second gas storage tank 11. Since the impurities in the residual gas are unknown, a series of purification components 13 can be set up for preliminary purification: 1. Filtering solid particles that may be contained in the residual gas (such as rust impurities in the tank and dust brought in from the outside) through a metal filter element; 2. Adsorbing moisture, oil and some organic impurities in the residual gas by filling with activated alumina, molecular sieves and the like.

[0046] Based on the above embodiments, a detection component is also included. The detection component is detachably connected to the second gas storage tank 11. The probe portion of the detection component is located inside the second gas storage tank 11 and is used to detect the amount of gas residue inside the second gas storage tank 11.

[0047] Specifically, since the amount of residual gas remaining in each second gas storage tank 11 is different after use, the concentration can be detected first, and then the pressure can be increased and decreased accordingly. Correspondingly, a detection component needs to be set up. The detection component is detachably connected to the second gas storage tank 11, and the gas concentration in the second gas storage tank 11 can be detected through the detection component.

[0048] Based on the above embodiments, a third gas storage tank 14 is also included, the third gas storage tank 14 and a gas preparation component 6, the gas preparation component 6 being used to introduce industrial gas into the third gas storage tank 14.

[0049] Specifically, the gas preparation component 6 is essentially a complete process preparation system for SF6 and CF4. Simply put, in this component, the gas will go through chemical reaction, crude processing, purification, and storage. After the gas preparation is completed and the analysis is qualified, it needs to be transported and sold. Usually, it is put into the third gas storage tank 14 for storage so that it can be sold later.

[0050] In addition, the main recovery pipe and analysis pipeline are usually mounted on the wall. To improve gas flow, a certain slope can be set, which should not be less than 3 per thousand. Fixed pipe clamps are also installed at intervals within a preset distance to provide stability for the pipeline installation.

[0051] Based on the above embodiment, the bottom of the third gas storage tank 14 is provided with a corresponding weighing component 15, which is used to weigh the third gas storage tank 14.

[0052] Specifically, each third gas storage tank 14 contains 3.3 kg of gas. For some customers, there are cost requirements, so the required gas mass may be less, such as only 3.2 kg. Therefore, before delivery, some of the gas in the third gas storage tank 14 will be discharged. This discharged gas will then enter the gas preparation component 6 and be re-prepared along with the crude gas. Since it is necessary to control the weight of the gas in multiple third gas storage tanks 14, a weighing component 15 is required to weigh each finished third gas storage tank 14 to ensure that the gas mass in the third gas storage tank 14 meets the standard requirements.

[0053] Based on the above embodiment, the first air outlet 3 is located on the side of the connector 2 away from the first air tank 1, and the second air outlet 4 is located between the first air outlet 3 and the first air tank 1.

[0054] Specifically, the second gas outlet 4 is set between the first gas outlet 3 and the first gas storage tank 1, so that the second gas outlet 4 can more smoothly discharge the gas remaining in the connector 2 into the gas preparation component 6. The structure of the connector 2 is simple and can be made by making a conventional connector, which makes it practical while effectively reducing costs.

[0055] In addition to the gas recovery system described above, this utility model also provides a gas production device that includes the gas recovery system disclosed in the above embodiments. For the structure of other parts of the gas production device, please refer to the prior art, and it will not be described again here.

[0056] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0057] The gas recovery system and gas production equipment provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A gas recovery system, characterized in that, include: The first gas storage tank (1) contains industrial gas; Connector (2) is connected to the first gas storage tank (1), and the connector (2) is provided with a first gas outlet (3) and a second gas outlet (4). The analysis device (5) is connected to the first gas outlet (3) through a pipeline. The analysis device (5) is used to detect the composition of the gas ejected from the first gas outlet (3). The gas preparation component (6) is connected to the second gas outlet (4) via a pipeline, and the gas preparation component (6) is used to recover the residual gas in the connector (2).

2. The gas recovery system according to claim 1, characterized in that, The analysis device (5) includes an air analysis device (7) and a moisture analysis device (8). The air analysis device (7) and the moisture analysis device (8) are respectively connected to the first port and the second port of the three-way valve (9) through pipes. The third port of the three-way valve (9) is connected to the first air outlet (3) through a pipe.

3. The gas recovery system according to claim 2, characterized in that, A pressure regulating element (10) is provided between the three-way valve (9) and the first air outlet (3).

4. The gas recovery system according to claim 3, characterized in that, It also includes a second gas storage tank (11), which is connected to the gas preparation assembly (6) via the connector (2), and is also connected to a pressurizing device (12).

5. The gas recovery system according to claim 4, characterized in that, The pipe between the connector (2) of the second gas storage tank (11) and the gas preparation component (6) is equipped with a purification component (13).

6. The gas recovery system according to claim 5, characterized in that, It also includes a detection component, which is detachably connected to the second gas storage tank (11). The probe portion of the detection component is located inside the second gas storage tank (11) and is used to detect the amount of gas residue inside the second gas storage tank (11).

7. The gas recovery system according to claim 6, characterized in that, It also includes a third gas storage tank (14), which is connected to the gas preparation component (6), and the gas preparation component (6) is used to introduce industrial gas into the third gas storage tank (14).

8. The gas recovery system according to claim 7, characterized in that, The bottom of the third gas storage tank (14) is provided with a corresponding weighing component (15), which is used to weigh the third gas storage tank (14).

9. The gas recovery system according to any one of claims 1 to 8, characterized in that, The first air outlet (3) is located on the side of the connector (2) away from the first air tank (1), and the second air outlet (4) is located between the first air outlet (3) and the first air tank (1).

10. A gas production apparatus, comprising a gas recovery system, characterized in that, The gas recovery system is the gas recovery system as described in any one of claims 1 to 9.

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