A three-stage corrosion gas treatment device applied to a vanadium redox flow energy storage system
By designing a three-stage corrosive gas treatment device for the vanadium redox flow storage system, the problem of unpurified corrosive gases is solved by using carbon fiber composite pads and Ca(OH)2 solution tanks for gas neutralization, thus achieving safe and reliable operation and health protection of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI CONCH RONGHUA ENERGY STORAGE TECH CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-19
AI Technical Summary
In existing vanadium redox flow storage systems, corrosive gases are discharged directly without purification, endangering human health and corroding critical components. Furthermore, the volatilization of electrolyte residues after sampling leads to severe corrosion.
A corrosive gas treatment device was designed, which includes a BMS controller, a leak sensor, a timer, a two-in-one gas detector, and primary, secondary, and tertiary treatment components. The device utilizes a carbon fiber composite pad and a Ca(OH)2 solution tank for gas neutralization and purification, forming a closed treatment loop.
It enables real-time detection and efficient purification of corrosive gases, preventing gas leaks, protecting the safe and stable operation of the system, and preventing corrosion of key components and harm to human health.
Smart Images
Figure CN224371075U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of vanadium redox flow batteries, specifically to a three-stage corrosive gas treatment device applied to vanadium redox flow energy storage systems. Background Technology
[0002] Currently, all vanadium redox flow storage systems (VLS) employ simple ventilation devices placed inside the capacity unit container to dilute corrosive gases before venting them outdoors. To minimize the hazards caused by corrosive gases, two methods are typically used: first, installing ventilation devices in the battery compartment to expel corrosive gases outdoors using fans; second, spraying anti-corrosion coatings onto the surfaces of critical equipment to reduce direct corrosion of materials through physical isolation. While these methods can reduce gas corrosion, their anti-corrosion effect is not significant at the project site, and corrosion is more severe inside the container.
[0003] Therefore, in practical applications, it is urgent to design corrosive gas replacement equipment that is adapted to the operating characteristics of vanadium redox flow batteries, so as to realize the detection, discharge and purification of gases, fundamentally solve the problem of corrosive gases eroding the core components of the battery system, and ensure the long-term safe and stable operation of the power station.
[0004] Defects and shortcomings of existing technology:
[0005] (1) Gas exhaust without purification device, endangering human health and polluting the environment. Conventional ventilation and air exchange devices do not have purification channels when exhausting corrosive gases outdoors, which makes the gas easily diffuse into the human respiratory tract, irritating the mucous membranes of the eyes, nose and throat, threatening human health.
[0006] (2) There is residue after electrolyte sampling and no treatment device. After the electrolyte sampling operation, the residual electrolyte in the valve pipeline continues to seep out and volatilize. The generated Cl2 and HCl gases will accumulate in the container and will seriously corrode key components in the long term. Summary of the Invention
[0007] The purpose of this invention is to provide a three-stage corrosive gas treatment device for a vanadium redox flow storage system, in order to overcome the above-mentioned defects in the prior art.
[0008] A three-stage corrosive gas treatment device for a vanadium redox flow storage system includes a BMS controller, a leak sensor, a timer, and a dual-function gas detector mounted on a container. The BMS controller is electrically connected to the leak sensor, timer, and dual-function gas detector. The device also includes a primary treatment component, a secondary treatment component, and a tertiary treatment component. An exhaust fan electrically connected to the BMS controller is installed on the inner wall of the container. The primary treatment component is located inside the container and uses the leak sensor to detect leaks and the timer to neutralize leaks periodically. The dual-function gas detector in the secondary treatment component is located inside the container and is used to detect and exhaust gases within the container. The tertiary treatment component is located outside the container and is used to transport and neutralize high-concentration corrosive gases.
[0009] Preferably, the primary processing component further includes a carbon fiber composite pad and a control valve. The carbon fiber composite pad is located below the liquid extraction valve inside the container. The two carbon rods of the leakage sensor are inserted into the carbon fiber composite pad and are electrically connected to the BMS controller. The control valve is installed on the liquid outlet pipe of the Ca(OH)2 storage chamber. The liquid outlet of the liquid outlet pipe is located above the carbon fiber composite pad. The BMS controller controls the control valve to open via a timer.
[0010] Preferably, the three-stage treatment assembly further includes a ventilation valve, a Ca(OH)2 solution tank, and a fan. The ventilation valve is installed on the container and electrically connected to the BMS controller. The ventilation valve is connected to the Ca(OH)2 solution tank through an exhaust pipe, and the fan is installed on the exhaust pipe.
[0011] Preferably, the control valve is a solenoid valve.
[0012] Preferably, the type of fan is an axial flow fan.
[0013] Preferably, the BMS controller is located inside the container on the outer wall of the container.
[0014] Preferably, the dual-sensor probe for Cl2 and HCl is integrated at the bottom of the two-in-one gas detector.
[0015] The beneficial effects achieved by this utility model are as follows:
[0016] 1. This application utilizes a dual-component system of a leakage sensor and a carbon fiber composite pad to achieve real-time detection of leakage signals from the liquid dispensing valve and synchronous adsorption of the electrolyte, effectively preventing false alarms from the sensor. The system employs a solenoid valve linked to a timer to precisely control the amount of Ca(OH)2 in the storage chamber wetting the carbon fiber composite pad, ensuring the neutralization reaction proceeds fully while preventing excessive reagent penetration.
[0017] 2. This application employs an axial flow fan installed on the exhaust pipe to form a complete closed-loop treatment circuit. During operation, one side efficiently extracts corrosive gases from the container by establishing a stable negative pressure environment, while the other side precisely delivers the gas to a Ca(OH)2 solution tank for neutralization. This unique dual-channel structure ensures sufficient exhaust airflow and achieves a completely closed-loop treatment process through pressure balance design and pipe coupling, eliminating the risk of gas leakage into the atmosphere and achieving a safe and reliable waste gas treatment effect. Attached Figure Description
[0018] Figure 1 This is a system diagram of the entire utility model.
[0019] Figure 2 This is a system diagram of the primary processing component of this utility model.
[0020] Figure 3 This is a flowchart of the present invention.
[0021] In the diagram: 1. Container; 2. Exhaust fan; 3. BMS controller; 4. Primary processing unit; 41. Leakage sensor; 42. Timer; 43. Carbon fiber composite pad; 44. Ca(OH)2 storage chamber; 45. Discharge pipe; 46. Control valve; 5. Secondary processing unit; 51. Two-in-one gas detector; 6. Tertiary processing unit; 61. Ventilation valve; 62. Exhaust pipe; 63. Ca(OH)2 solution tank; 64. Fan. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0024] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0025] like Figure 1-2 As shown, this utility model provides a three-stage corrosive gas treatment device for a vanadium redox flow storage system, including a BMS controller 3, a leak sensor 41, a timer 42, and a two-in-one gas detector 51 installed on a container 1. The BMS controller 3 is installed inside a box that is hung on the outer wall of the container 1 and is connected to various electronic devices inside the container 1 through cable tray wiring. The BMS controller 3 is electrically connected to the leak sensor 41, the timer 42, and the two-in-one gas detector 51. It also includes a first-stage treatment component 4, a second-stage treatment component 5, and a third-stage treatment component 6. An exhaust fan 2 that is electrically connected to the BMS controller 3 is installed on the inner wall of the container 1.
[0026] In addition, the primary processing component 4 is located in the container 1 and uses a leak sensor 41 to detect leaks and a timer 42 to neutralize leaks periodically. The primary processing component 4 also includes a carbon fiber composite pad 43 and a control valve 46. The carbon fiber composite pad 43 is located below the liquid extraction valve in the container 1. The two carbon rods of the leak sensor 41 are inserted into the carbon fiber composite pad 43 and are electrically connected to the BMS controller 3. When liquid wets the space between the two carbon rods, the circuit is turned on and the BMS controller 3 receives a signal.
[0027] The control valve 46 is a solenoid valve and is installed on the outlet pipe 45 of the Ca(OH)2 storage chamber 44. The outlet of the outlet pipe 45 is located above the carbon fiber composite pad 43. The BMS controller 3 controls the control valve 46 to open via the timer 42.
[0028] (1) Primary processing (reference) Figure 3(The section in yellow in the middle): This device integrates a leakage detection and processing system below the sampling valve, consisting of a leakage sensor 41 and a loosely porous carbon fiber composite pad 43. When electrolyte drips from the sampling valve onto the carbon fiber composite pad 43, the leakage sensor 41 detects the electrolyte leakage and immediately sends a signal to the BMS controller 3. The BMS controller 3 then controls the solenoid valve to open for 2 seconds via a timer 42. The alkaline reagent in the Ca(OH)2 storage chamber 44 flows onto the carbon fiber composite pad 43, causing the electrolyte and alkaline reagent to react and neutralize within the carbon fiber composite pad 43. This neutralization reaction eliminates the acidic electrolyte and prevents corrosive gases from escaping. After neutralization is complete, the system automatically resets the sensor and deactivates the alarm.
[0029] In addition, the two-in-one gas detector 51 of the secondary processing component 5 is installed in the container 1 and is used to detect and discharge the gas in the container 1. The two-in-one gas detector 51 integrates a dual collection probe for Cl2 and HCl at the bottom. When the gas is collected, it outputs a signal to the BMS controller 3.
[0030] (2) Secondary processing (reference) Figure 3 (Blue line in the middle): This device collects the gas content inside container 1 in real time using a combined Cl2 and HCl gas detector. When 1ppm < gas concentration ≤ 10ppm, it sends a feedback signal to BMS controller 3, which controls the exhaust fan 2 on container 1 to start and exhaust the gas outside container 1 until the gas concentration < 1ppm and the exhaust fan 2 stops running.
[0031] It should be noted that the three-stage treatment component 6 is located outside the container 1 and is used to transport and neutralize high-concentration corrosive gases. The three-stage treatment component 6 also includes a ventilation valve 61, a Ca(OH)2 solution tank 63, and a fan 64. The ventilation valve 61 is installed on the container 1 and electrically connected to the BMS controller 3. The ventilation valve 61 is connected to the Ca(OH)2 solution tank 63 through an exhaust pipe 62. The fan 64 is an axial flow fan and is installed on the exhaust pipe 62.
[0032] (3) Three-level processing (reference) Figure 3 (Red line in the middle): When the detected gas concentration is >10ppm, the system immediately sends a shutdown command to the BMS controller 3 to stop the operation of the exhaust fan 2 in container 1. At the same time, the ventilation valve 61 is opened and the external high-power fan 64 is started. The high-concentration corrosive gas is transported to the Ca(OH)2 solution tank for neutralization treatment through the dedicated exhaust pipe 62 until the gas concentration is <1ppm and the fan 64 stops running, ensuring zero emission of harmful gases.
[0033] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.
Claims
1. A three-stage corrosive gas treatment device for a vanadium redox flow storage system, comprising a BMS controller (3), a leak sensor (41), a timer (42), and a dual-function gas detector (51) mounted on a container (1), wherein the BMS controller (3) is electrically connected to the leak sensor (41), the timer (42), and the dual-function gas detector (51), characterized in that: It also includes a primary processing component (4), a secondary processing component (5) and a tertiary processing component (6). An exhaust fan (2) electrically connected to the BMS controller (3) is installed on the inner wall of the container (1). The primary processing component (4) is located in the container (1) and uses a leak sensor (41) to detect leaks and a timer (42) to neutralize leaks periodically. The two-in-one gas detector (51) of the secondary processing component (5) is located in the container (1) and is used to detect and discharge the gas in the container (1). The tertiary processing component (6) is located outside the container (1) and is used to transport and neutralize high-concentration corrosive gases.
2. The three-stage corrosive gas treatment device for a vanadium redox flow storage system according to claim 1, characterized in that: The primary processing component (4) also includes a carbon fiber composite pad (43) and a control valve (46). The carbon fiber composite pad (43) is located below the liquid extraction valve inside the container (1). The two carbon rods of the leakage sensor (41) are inserted into the carbon fiber composite pad (43) and are electrically connected to the BMS controller (3). The control valve (46) is installed on the liquid outlet pipe (45) of the Ca(OH)2 storage chamber (44). The liquid outlet of the liquid outlet pipe (45) is located above the carbon fiber composite pad (43). The BMS controller (3) controls the control valve (46) to open via a timer (42).
3. The three-stage corrosive gas treatment device for a vanadium redox flow storage system according to claim 1, characterized in that: The three-stage processing component (6) also includes a ventilation valve (61), a Ca(OH)2 solution tank (63), and a fan (64). The ventilation valve (61) is installed on the container (1) and electrically connected to the BMS controller (3). The ventilation valve (61) is connected to the Ca(OH)2 solution tank (63) through an exhaust pipe (62). The fan (64) is installed on the exhaust pipe (62).
4. The three-stage corrosive gas treatment device for a vanadium redox flow storage system according to claim 2, characterized in that: The control valve (46) is a solenoid valve.
5. A three-stage corrosive gas treatment device for a vanadium redox flow storage system according to claim 3, characterized in that: The type of the fan (64) is an axial flow fan.
6. The three-stage corrosive gas treatment device for a vanadium redox flow storage system according to claim 1, characterized in that: The BMS controller (3) is located inside the container on the outer wall of the container (1).
7. A three-stage corrosive gas treatment device for a vanadium redox flow storage system according to claim 1, characterized in that: The two-in-one gas detector (51) integrates a dual-sampling probe for Cl2 and HCl at the bottom.