Nitrogen unloading tank car apparatus
Patent Information
- Application Number
- CN202521951177.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-09-11
AI Technical Summary
[0005]本实用新型的目的在于提供一种氮气卸槽车装置，所要解决的技术问题如下：现有储罐在进行内部氮气排空时易将易挥发并固化凝结的物料带至用于平衡气压的呼吸阀处，造成储罐憋压的问题
通过在储罐一侧设置缓冲罐，并由过气管进行连接，在槽车顶端安装槽车泄压管线，并在缓冲罐顶端安装储罐泄压管线，同时在缓冲罐顶端安装带有氮封阀的氮气保护管线和带有保护阀的呼吸阀，则在装料过程中，可通过关闭氮封阀和保护阀且开启泄压阀二的方式对储罐内的尾气进行排出，同时避免与氮气保护管线以及呼吸阀接触，在装料完成后，可通过关闭泄压阀二和开启泄压阀一的方式对槽车内部的残余尾气进行排出；该使用过程中的技术优势在于，一方面可将装料过程中产生的储罐内尾气以及装料完成后的槽车残余尾气进行处理，避免直排大气产生的空气污染；
Smart Images
Figure CN224860414U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of storage tank technology, specifically relating to a nitrogen unloading tanker device. Background Technology
[0002] A sealed container used to store liquid or gaseous raw materials is a storage tank. Storage tanks are an indispensable infrastructure in the petrochemical industry. They are usually fed by pumps. However, due to the special chemical properties of some raw materials, nitrogen pressurization and unloading tank trucks are required for feeding into storage tanks.
[0003] During the later stages of nitrogen unloading, as the material to be fed has been transported, some of the nitrogen used for pushing the material enters the storage tank due to inertia. The entry of nitrogen into the storage tank will cause liquid level fluctuations, making it difficult for the staff to count the total amount of material fed into the storage tank by liquid level. Therefore, it is necessary to discharge this part of nitrogen. In existing technologies, nitrogen is vented internally by installing a breather valve on the top of the storage tank. However, this approach has several drawbacks. The breather valve, used to balance the pressure, is directly connected to the storage tank. When nitrogen is discharged, it carries easily crystallizing materials to the breather valve, causing blockage and potentially leading to valve malfunction. This can result in the storage tank being at risk of pressure buildup and deformation. Furthermore, if nitrogen is unloaded and the tank is sealed off from further feeding, the residual exhaust gas used to propel the material on the unloading side cannot be effectively and promptly addressed. Although the nitrogen entering the tank is vented, it can still disturb the liquid level. It is difficult to set up a high-level interlock based on the liquid level, and workers may fail to promptly stop feeding due to difficulty in judging the tank's liquid level, leading to overflow and tank overflow.
[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content
[0005] The purpose of this utility model is to provide a nitrogen unloading tanker device, and the technical problem to be solved is as follows: When the existing storage tank is purged of internal nitrogen, it is easy to carry volatile and solidified materials to the breather valve used to balance the air pressure, causing the storage tank to be pressurized.
[0006] The objective of this utility model can be achieved through the following technical solutions: A nitrogen unloading tanker device includes a tanker truck, a storage tank on one side of the tanker truck, a feed valve installed between the tanker truck and the storage tank, a buffer tank on one side of the storage tank, an venting pipe installed between the storage tank and the buffer tank, both the tanker truck and the buffer tank being connected to an exhaust gas treatment unit, a nitrogen sealing valve installed at the top of the buffer tank, a nitrogen protection pipeline installed at the top of the nitrogen sealing valve, and a breather valve installed on one side of the top of the buffer tank for maintaining the pressure balance of the buffer tank.
[0007] As a further embodiment of this utility model: a nitrogen valve is installed on one side of the top of the tank truck, a nitrogen input unit is connected to the outer end of the nitrogen valve, and a grounding wire is provided on one side of the bottom of the tank truck.
[0008] As a further embodiment of this utility model: a tank truck pressure relief pipeline is installed on one side of the top of the tank truck, and a pressure relief valve is installed on one side of the tank truck pressure relief pipeline; a storage tank pressure relief pipeline is installed on the top of the buffer tank, and a pressure relief valve is installed on one side of the storage tank pressure relief pipeline.
[0009] As a further embodiment of this utility model: the exhaust gas treatment unit is installed at the outer end of the tank truck pressure relief pipeline and the storage tank pressure relief pipeline.
[0010] As a further embodiment of this utility model: a nitrogen sealing valve is installed between the nitrogen protection pipeline and the buffer tank, and a protection valve is installed between the breathing valve and the buffer tank.
[0011] As a further aspect of this utility model, the air passage is normally open.
[0012] The beneficial effects of this utility model are: By installing a buffer tank on one side of the storage tank and connecting it with an vent pipe, installing a tank truck pressure relief pipeline on the top of the tank truck, and installing a storage tank pressure relief pipeline on the top of the buffer tank, and simultaneously installing a nitrogen protection pipeline with a nitrogen sealing valve and a breather valve with a protection valve on the top of the buffer tank, the exhaust gas in the storage tank can be discharged during the loading process by closing the nitrogen sealing valve and the protection valve and opening the second pressure relief valve, while avoiding contact with the nitrogen protection pipeline and the breather valve. After loading is completed, the residual exhaust gas inside the tank truck can be discharged by closing the second pressure relief valve and opening the first pressure relief valve. The technical advantage of this method is that it can treat the exhaust gas in the storage tank generated during the loading process and the residual exhaust gas in the tank truck after loading is completed, avoiding air pollution caused by direct discharge into the atmosphere. On the other hand, by setting up a buffer tank to separate the storage tank from the nitrogen protection pipeline and the breather valve, the exhaust gas generated during the feeding process cannot directly carry the easily crystallized and solidified material in the storage tank to block the nitrogen protection pipeline and the breather valve, thereby effectively avoiding the problem of storage tank pressure due to the blockage of the nitrogen protection pipeline and the breather valve. In addition, the exhaust gas generated in the storage tank during the loading process is directly discharged and treated through the buffer tank, and will not remain in the storage tank and disturb its liquid level. This avoids the problem of overflowing the tank due to staff misjudging the liquid level. Attached Figure Description
[0013] The present invention will be further described below with reference to the accompanying drawings.
[0014] Figure 1This is a schematic diagram of the overall structure of this utility model.
[0015] In the diagram: 1. Tank truck; 2. Nitrogen valve; 3. Storage tank; 4. Feed valve; 5. Buffer tank; 6. Gas pipe; 7. Tank truck pressure relief line; 8. Pressure relief valve one; 9. Storage tank pressure relief line; 10. Pressure relief valve two; 11. Nitrogen protection line; 12. Nitrogen sealing valve; 13. Protection valve; 14. Breather valve. Detailed Implementation
[0016] 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 scope of protection of the present utility model.
[0017] like Figure 1 As shown, a nitrogen unloading tank truck device includes a tank truck 1, a storage tank 3 is installed on one side of the tank truck 1, a feed valve 4 is installed between the tank truck 1 and the storage tank 3, a buffer tank 5 is installed on one side of the storage tank 3, an air passage pipe 6 is installed between the storage tank 3 and the buffer tank 5, both the tank truck 1 and the buffer tank 5 are connected to the exhaust gas treatment unit, a nitrogen sealing valve 12 is installed at the top of the buffer tank 5, a nitrogen protection pipeline 11 is installed at the top of the nitrogen sealing valve 12, and a breather valve 14 is installed on one side of the top of the buffer tank 5. The breather valve 14 is used to maintain the pressure balance of the buffer tank 5. It should be noted that a nitrogen valve 2 is installed on one side of the top of the tank truck 1. The outer end of the nitrogen valve 2 is connected to a nitrogen input unit. A grounding wire is installed on one side of the bottom of the tank truck 1. That is, after the tank truck 1 is parked next to the storage tank 3, it maintains safety through grounding and inputs nitrogen into the vehicle through the external nitrogen input unit. Then, it is connected to the storage tank 3 through the feed valve 4 to realize the gas pushing function of the material. Specifically, the tank truck 1 pushes the material along the feed valve 4 to the storage tank 3 by opening the nitrogen valve 2 and the feed valve 4. During this period, the storage tank 3 is kept in communication with the buffer tank 5 through the vent pipe 6. The vent pipe 6 is kept in the normally open state during use.
[0018] A tank truck pressure relief pipeline 7 is installed on one side of the top of the tank truck 1, and a pressure relief valve 8 is installed on one side of the tank truck pressure relief pipeline 7. A storage tank pressure relief pipeline 9 is installed on the top of the buffer tank 5, and a pressure relief valve 10 is installed on one side of the storage tank pressure relief pipeline 9. The exhaust gas treatment unit is installed on the outer end of the tank truck pressure relief pipeline 7 and the storage tank pressure relief pipeline 9. A nitrogen sealing valve 12 is installed between the nitrogen protection pipeline 11 and the buffer tank 5; a protection valve 13 is installed between the breather valve 14 and the buffer tank 5. It should be noted that since the storage tank 3 and the buffer tank 5 are connected by the vent pipe 6, the storage tank pressure relief pipeline 9, which was originally installed at the top of the storage tank 3, can be installed at the top of the buffer tank 5. In actual use, the volatile crystalline material in the storage tank 3 will not block the pipeline when the storage tank pressure relief pipeline 9 is released with exhaust gas, thereby improving the safety of the storage tank 3.
[0019] The working principle of this utility model: Loading process. Open the pressure relief valve 10 on the pressure relief pipeline 9 of the storage tank to maintain the exhaust gas venting state in advance. At the same time, close the nitrogen sealing valve 12 and the protection valve 13. The nitrogen sealing valve 12 supplies gas to the buffer tank 5 through the nitrogen protection pipeline 11. During the feeding process, the exhaust gas flows through the buffer tank 5. At this time, the nitrogen sealing valve 12 is closed to prevent the exhaust gas and the protective nitrogen from colliding, and to prevent the exhaust gas from entering the nitrogen protection system at the end of the nitrogen protection pipeline 11. The protection valve 13 is used to protect the breather valve 14. Closing the protection valve 13 is used to prevent the exhaust gas from directly entering the atmosphere through the breather valve 14 during the feeding process, thus preventing air pollution. Then, open the feed valve 4 and the nitrogen valve 2 in sequence. The nitrogen valve 2 pushes the material in the tank car 1 through the feed valve 4 into the storage tank 3. The air in the storage tank 3, along with the exhaust gas generated by the push, enters the buffer tank 5 through the gas pipe 6, and enters the exhaust gas treatment unit at the end of the pressure relief pipeline 9 of the storage tank through the opened pressure relief valve 10 for treatment. That is, the exhaust gas in the storage tank 3 is treated during the loading process. In addition, since the exhaust gas during the loading process is always delivered to the exhaust gas treatment unit, the liquid level in the storage tank 3 will not be affected by the exhaust gas remaining in it, and will always remain stable. This makes it easy for staff to measure the liquid level inside the storage tank 3, avoiding the problem of the liquid level inside the storage tank 3 being difficult to measure due to the impact of exhaust gas in the existing technology, which could lead to the overflow of materials inside the storage tank 3 and the problem of unloading the tank.
[0020] After loading is complete, close the nitrogen valve 2 at the top of tanker truck 1 and the feed valve 4 connected to storage tank 3 to stop feeding into storage tank 3. Then close pressure relief valve 10 and open nitrogen sealing valve 12, protection valve 13, and breather valve 14. Since exhaust gas has been discharged from storage tank 3 during loading, it is necessary to seal the material in storage tank 3 to prevent volatilization. Therefore, close pressure relief valve 10 and open nitrogen sealing valve 12 to inject protective nitrogen into buffer tank 5. Opening protection valve 13 and breather valve 14 is used to discharge some of the protective nitrogen from buffer tank 5 to maintain buffer flow. The pressure inside the flushing tank 5 and the connected storage tank 3 is balanced to prevent pressure buildup inside the storage tank 3. Then, the pressure relief valve 8 is opened. At this time, the tank truck 1 is disconnected from the storage tank 3 and no new nitrogen is injected for material pushing. However, some nitrogen and material still remain inside the tank truck 1, which produces exhaust gas. This exhaust gas enters the tail gas treatment unit installed at the end of the storage tank pressure relief pipeline 9 through the tank truck pressure relief pipeline 7 and the pressure relief valve 8 for treatment. That is, after the loading is completed, the residual tail gas inside the tank truck 1 can also be effectively treated. In addition, although the ends of the storage tank pressure relief pipeline 9 and the tank truck pressure relief pipeline 7 are both connected to the exhaust gas treatment unit, the pressure relief valve 10 is closed at this time, so the residual exhaust gas in the tank truck 1 will not flow back to the buffer tank 5 and the storage tank 3 along the storage tank pressure relief pipeline 9.
[0021] Furthermore, in the prior art, the breather valve 14 used to maintain the internal pressure balance of the storage tank 3 and the nitrogen protection pipeline 11 used to seal the storage tank 3 are both directly installed on the top of the storage tank 3. Therefore, when the storage tank 3 is being fed and the exhaust gas is being discharged, the material in the storage tank 3, along with the exhaust gas, will block the breather valve 14 and the nitrogen protection pipeline 11. However, in this device, the material in the storage tank 3 is separated from the buffer tank 5, and the nitrogen sealing valve 12 and the protection valve 13 close the nitrogen protection pipeline 11 and the breather valve 14 during the exhaust gas discharge stage in the storage tank 3. As a result, when nitrogen sealing and pressure balancing of the breather valve 14 are performed subsequently, there will be no exhaust gas carrying easily crystallizing material to block the tank, thereby effectively avoiding the problem of internal pressure buildup and deformation of the storage tank 3.
[0022] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.
Claims
1. A nitrogen unloading tanker device, comprising a tanker (1), characterized in that, A storage tank (3) is provided on one side of the tank truck (1), and a feed valve (4) is installed between the tank truck (1) and the storage tank (3). A buffer tank (5) is provided on one side of the storage tank (3), and an exhaust pipe (6) is installed between the storage tank (3) and the buffer tank (5). Both the tank truck (1) and the buffer tank (5) are connected to the exhaust gas treatment unit. A nitrogen sealing valve (12) is installed at the top of the buffer tank (5), and a nitrogen protection pipeline (11) is installed at the top of the nitrogen sealing valve (12). A breather valve (14) is installed on one side of the top of the buffer tank (5), and the breather valve (14) is used to maintain the air pressure balance of the buffer tank (5).
2. The nitrogen unloading tanker device according to claim 1, characterized in that, A nitrogen valve (2) is installed on one side of the top of the tank truck (1), and a nitrogen input unit is connected to the outer end of the nitrogen valve (2). A grounding wire is provided on one side of the bottom of the tank truck (1).
3. The nitrogen unloading tanker device according to claim 1, characterized in that, The tank truck (1) is equipped with a tank truck pressure relief pipeline (7) on one side of the top, and a pressure relief valve (8) is installed on one side of the tank truck pressure relief pipeline (7). The buffer tank (5) is equipped with a storage tank pressure relief pipeline (9) on the top, and a pressure relief valve (10) is installed on one side of the storage tank pressure relief pipeline (9).
4. A nitrogen unloading tanker device according to claim 3, characterized in that, The exhaust gas treatment unit is installed at the outer end of the tank truck pressure relief pipeline (7) and the storage tank pressure relief pipeline (9).
5. A nitrogen unloading tanker device according to claim 1, characterized in that, A nitrogen sealing valve (12) is installed between the nitrogen protection pipeline (11) and the buffer tank (5), and a protection valve (13) is installed between the breathing valve (14) and the buffer tank (5).
6. A nitrogen unloading tanker device according to claim 1, characterized in that, The air passage (6) is normally open.