Adjustable pressure relief device suitable for hydrogen exhaust pipe
By installing an adjustable pressure relief device on the hydrogen exhaust pipe, and utilizing the combination of the pressure relief pipe and the cover plate, the explosion hazard of the hydrogen exhaust pipe was solved, and safe and stable hydrogen emission was achieved.
Patent Information
- Application Number
- CN202520086000.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-15
AI Technical Summary
Existing hydrogen exhaust pipes pose an explosion hazard, especially with a high risk of electrostatic detonation when hydrogen concentration reaches the explosive limit.
An adjustable pressure relief device for hydrogen exhaust pipes was designed, including a pressure relief pipe, a cover plate, and an iron chain. The pressure inside the hydrogen exhaust pipe is controlled by adjusting the thickness of the cover plate, thereby achieving automatic pressure relief.
It effectively reduces the risk of hydrogen exhaust pipe explosion, has a simple structure, saves equipment costs, and can adjust the pressure relief threshold as needed.
Smart Images
Figure CN223768194U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wet recycling technology for lithium-ion batteries, and in particular to an adjustable pressure relief device for the safe discharge of hydrogen-containing tail gas generated during the pretreatment of lithium-ion battery recycling powder. Background Technology
[0002] As the proportion of fossil fuel consumption continues to decrease and the proportion of clean energy increases, the rapid development of lithium-ion batteries is being driven. The normal lifespan of lithium-ion batteries is 6-8 years. With the large-scale introduction of lithium-ion batteries into the market, the lithium-ion battery recycling market has also experienced phenomenal growth. However, the recycled lithium-ion battery powder contains numerous impurities, particularly metallic aluminum, making its recovery challenging. Most processes involve pretreatment methods such as alkaline leaching to remove these impurities.
[0003] Aluminum is an amphoteric element that can react with alkalis to produce hydrogen gas. During the emission of hydrogen-containing waste gas, it is easy to generate static electricity by interacting with the emission pipe. When the hydrogen concentration in the waste gas reaches the explosion limit, the hydrogen will be ignited by static electricity, resulting in a high explosion risk in existing hydrogen exhaust pipes.
[0004] Therefore, how to control the pressure inside the hydrogen exhaust pipe and reduce the risk of explosion in hydrogen pipelines is one of the technical problems that urgently need to be solved in this field. Utility Model Content
[0005] The purpose of this invention is to provide an adjustable pressure relief device suitable for hydrogen exhaust pipes, thereby solving the problem of high explosion risk in existing hydrogen exhaust pipes.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0007] This utility model provides an adjustable pressure relief device suitable for hydrogen exhaust pipes, including a hydrogen exhaust pipe and a pressure relief device, wherein the pressure relief device is installed on the side wall of the hydrogen exhaust pipe.
[0008] The pressure relief device includes a pressure relief pipe, a cover plate, and an iron chain. The pressure relief pipe is installed on the side wall of the hydrogen exhaust pipe, and the cavity of the pressure relief pipe is connected to the cavity of the hydrogen exhaust pipe. The cover plate covers the pressure relief pipe opening. One end of the iron chain is connected to the pressure relief pipe, and the other end is connected to the cover plate.
[0009] Optionally, the central axis of the hydrogen exhaust pipe is perpendicular to the central axis of the pressure relief pipe.
[0010] Optionally, the thickness of the cover plate corresponds to the gas pressure inside the hydrogen exhaust pipe.
[0011] Optionally, a sealing strip is also provided at the connection between the cover plate and the pressure relief pipe.
[0012] Optionally, the sealing strip is a U-shaped silicone sealing strip.
[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:
[0014] 1) By installing a simple pressure relief device on the hydrogen emission pipe, the problem of overpressure in the hydrogen emission pipe can be effectively solved, thereby reducing the risk of explosion of the hydrogen emission pipe.
[0015] 2) By adjusting the thickness of the cover plate, the pressure inside the hydrogen exhaust pipe can be adjusted, thereby regulating the pressure relief threshold of the pressure relief device.
[0016] 3) The adjustable pressure relief device for hydrogen exhaust pipe of this utility model has a simple structure and saves on the high cost of equipment. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings.
[0018] Figure 1 This is a schematic diagram of the structure of an adjustable pressure relief device for hydrogen exhaust pipes according to the present invention.
[0019] Explanation of reference numerals in the attached diagram: 1. Hydrogen exhaust pipe; 2. Pressure relief pipe; 3. Cover plate; 4. Iron chain; 5. Sealing strip. Detailed Implementation
[0020] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0021] like Figure 1 As shown, an adjustable pressure relief device for a hydrogen exhaust pipe includes a hydrogen exhaust pipe 1 and a pressure relief device, wherein the pressure relief device is installed on the side wall of the hydrogen exhaust pipe 1.
[0022] The pressure relief device includes a pressure relief pipe 2, a cover plate 3, and an iron chain 4. The pressure relief pipe 2 is installed on the side wall of the hydrogen exhaust pipe 1. The cavity of the pressure relief pipe 2 is connected to the cavity of the hydrogen exhaust pipe 1. The cover plate 3 covers the pressure relief port of the pressure relief pipe 2. One end of the iron chain 4 is connected to the pressure relief pipe 2, and the other end is connected to the cover plate 3.
[0023] The iron chain 4 is used to fix the cover plate 3 after depressurization. At the same time, during the depressurization process, the iron chain 4 is used to control the depressurization direction of the cover plate 3.
[0024] In practice, multiple iron chains 4 are arranged in a circular pattern around the pressure relief pipe 2, and the length of each iron chain 4 is different in order to control the pressure relief direction of the cover plate 3.
[0025] Specifically, the central axis of the hydrogen exhaust pipe 1 is perpendicular to the central axis of the pressure relief pipe 2.
[0026] Specifically, the thickness of the cover plate 3 corresponds to the gas pressure inside the hydrogen exhaust pipe 1.
[0027] In practice, the cover plate 3 is placed directly on the pressure relief pipe 2. By adjusting the thickness of the cover plate 3, the weight of the cover plate 3 can be adjusted. The heavier the cover plate 3, the greater the air pressure that needs to be lifted, thereby regulating the air pressure inside the pressure relief pipe 2.
[0028] Specifically, a sealing strip 5 is also provided at the connection between the cover plate 3 and the pressure relief pipe 2.
[0029] Specifically, the sealing strip 5 is a U-shaped silicone sealing strip. The sealing strip 5 is used to prevent external gases from entering the hydrogen exhaust pipe 1.
[0030] Example 1
[0031] Hydrogen-containing exhaust gas at 10 kPa is discharged through hydrogen exhaust pipe 1. The opening of pressure relief pipe 2 is sealed with a cover plate 3 with a thickness of 5 mm. Hydrogen exhaust pipe 1 discharges hydrogen gas stably. When the gas pressure inside hydrogen exhaust pipe 1 reaches 12 kPa, the pressure relief device automatically starts to release pressure.
[0032] Example 2
[0033] Hydrogen-containing exhaust gas at 12 kPa is discharged through hydrogen exhaust pipe 1. The opening of pressure relief pipe 2 is sealed with a cover plate 3 with a thickness of 6 mm. Hydrogen exhaust pipe 1 discharges hydrogen steadily. When the gas pressure inside hydrogen exhaust pipe 1 reaches 14 kPa, the pressure relief device automatically starts to release pressure.
[0034] Example 3
[0035] Hydrogen-containing exhaust gas at 14 kPa is discharged through hydrogen exhaust pipe 1. The opening of pressure relief pipe 2 is sealed with a cover plate 3 with a thickness of 7 mm. Hydrogen exhaust pipe 1 discharges hydrogen gas stably. When the gas pressure inside hydrogen exhaust pipe 1 reaches 16 kPa, the pressure relief device automatically starts to release pressure.
[0036] Example 4
[0037] Hydrogen-containing exhaust gas at 16 kPa is discharged through hydrogen exhaust pipe 1. The opening of pressure relief pipe 2 is sealed with a cover plate 3 with a thickness of 8 mm. Hydrogen exhaust pipe 1 discharges hydrogen gas stably. When the gas pressure inside hydrogen exhaust pipe 1 reaches 16 kPa, the pressure relief device automatically starts to release pressure.
[0038] Example 5
[0039] Hydrogen-containing exhaust gas at 18 kPa is discharged through hydrogen exhaust pipe 1. The opening of pressure relief pipe 2 is sealed with a cover plate 3 with a thickness of 9 mm. Hydrogen exhaust pipe 1 discharges hydrogen gas stably. When the gas pressure inside hydrogen exhaust pipe 1 reaches 20 kPa, the pressure relief device automatically starts to release pressure.
[0040] Example 6
[0041] Hydrogen-containing exhaust gas at 20 kPa is discharged through hydrogen exhaust pipe 1. The opening of pressure relief pipe 2 is sealed with a cover plate 3 with a thickness of 10 mm. Hydrogen exhaust pipe 1 discharges hydrogen steadily. When the gas pressure inside hydrogen exhaust pipe 1 reaches 22 kPa, the pressure relief device automatically starts to release pressure.
[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. An adjustable pressure relief device for a hydrogen exhaust pipe, comprising: The hydrogen exhaust pipe (1) and a pressure relief device are included, and the pressure relief device is installed on the side wall of the hydrogen exhaust pipe (1); The pressure relief device includes a pressure relief pipe (2), a cover plate (3), and an iron chain (4), the pressure relief pipe (2) is installed on the side wall of the hydrogen exhaust pipe (1), the lumen of the pressure relief pipe (2) is connected with the lumen of the hydrogen exhaust pipe (1), the cover plate (3) covers the pressure relief pipe opening of the pressure relief pipe (2), one end of the iron chain (4) is connected with the pressure relief pipe (2), and the other end is connected with the cover plate (3).
2. The adjustable pressure relief device for a hydrogen exhaust pipe of claim 1, wherein: The central axis of the hydrogen exhaust pipe (1) is perpendicular to the central axis of the pressure relief pipe (2).
3. The adjustable pressure relief device for a hydrogen exhaust pipe of claim 1, wherein: The thickness of the cover plate (3) corresponds to the gas pressure in the hydrogen exhaust pipe (1).
4. The adjustable pressure relief device for a hydrogen exhaust pipe of claim 1, wherein: A sealing strip (5) is arranged at the connection between the cover plate (3) and the pressure relief pipe (2).
5. The adjustable pressure relief device for a hydrogen exhaust pipe of claim 4, wherein: The sealing strip (5) is a U-shaped silica gel sealing strip.