Electrolytic tank for treating shale gas produced water

Abstract

The utility model belongs to the field of electrolysis equipment, and discloses an electrolytic tank for treating shale gas produced water, which comprises an electrolytic tank and a closed electrolysis control cabinet. A positive pressure protection system is arranged in the electrolysis control cabinet and comprises a clean gas supply system, a pressure control device and a sealing assembly. The clean gas supply system is used for providing clean gas into the control cabinet; the pressure control device adjusts the gas pressure in the control cabinet, so that the gas pressure is maintained in a preset positive pressure range; the sealing assembly is arranged at each interface of the control cabinet to prevent external gas from entering. Clean gas enters the control cabinet through the gas supply pipeline, a positive pressure environment is formed, and external air containing corrosive gas such as ammonia gas and chlorine is prevented from entering the control cabinet. According to the design, corrosion of corrosive gas to electrical components in the control cabinet is effectively prevented, the equipment failure frequency is reduced, the service life of equipment is remarkably prolonged, and the reliability and stability of the electrolysis device are improved.

Description

Technical Field

[0001] This utility model belongs to the field of electrolysis equipment technology, specifically relating to an electrolysis cell for treating shale gas produced water. Background Technology

[0002] In shale gas produced water treatment, the electrolysis unit is one of the key pieces of equipment. Existing shale gas produced water treatment plants use electrolysis units with low-voltage, high-current (6000A) control cabinets. During electrolysis, a large amount of heat is generated inside the control cabinet, requiring forced-air cooling. However, during forced-air cooling, corrosive gases such as ammonia and chlorine produced in the electrolyzed produced water are blown into the control cabinet, causing severe corrosion of various electrical components, frequent malfunctions, and a significantly shortened equipment lifespan, typically only about two years.

[0003] Therefore, there is an urgent need for an electrolytic cell that can prevent corrosive gases from entering the control cabinet in order to improve the reliability and service life of the equipment. Utility Model Content

[0004] This utility model aims to provide an electrolytic cell for treating shale gas produced water. By establishing a positive pressure protection system inside the control cabinet, corrosive gases are prevented from entering the control cabinet, protecting internal electrical components and extending the service life of the equipment.

[0005] To achieve the above objectives, this utility model provides an electrolytic cell for treating shale gas produced water, including an electrolytic cell and an electrolytic control cabinet. The electrolytic control cabinet has a sealed structure and is equipped with a positive pressure protection system. The positive pressure protection system includes:

[0006] Clean gas supply system: supplies clean gas to the electrolysis control cabinet;

[0007] Pressure control device: Regulates the gas pressure inside the electrolysis control cabinet and maintains it within the preset positive pressure range;

[0008] Sealing components: installed at each interface of the electrolysis control cabinet to prevent external gases from entering.

[0009] Clean gas enters the electrolysis control cabinet through the gas supply pipeline, creating a positive pressure environment and preventing external air containing corrosive gases from entering the control cabinet.

[0010] Working principle:

[0011] By establishing a positive pressure environment within the electrolysis control cabinet and utilizing a continuous supply of clean gas, the pressure inside the cabinet is made higher than the external atmospheric pressure. As the gas flows from the high-pressure area to the low-pressure area, the positive pressure environment effectively prevents external air containing corrosive gases such as ammonia and chlorine from seeping into the control cabinet, protecting the internal electrical components from corrosion.

[0012] Technical advantages:

[0013] Significant corrosion protection: The positive pressure protection system fundamentally prevents corrosive gases from entering, extending the service life of electrical components.

[0014] Improved equipment reliability: Reduced equipment failures caused by corrosion, ensuring the continuity and stability of production.

[0015] Simple and feasible structure: It adopts a closed structure and positive pressure system, which is technically mature and easy to implement.

[0016] Furthermore, the clean gas supply system includes:

[0017] Clean gas source: Provides dry, clean gas;

[0018] Filters and dryers: installed on the gas supply line to filter and dry the gas;

[0019] Flow control device: including pressure reducing valve, flow meter and solenoid valve, to control the gas pressure and flow rate entering the electrolysis control cabinet.

[0020] Working principle:

[0021] The clean gas supply passes through filters and dryers to remove impurities and moisture, ensuring gas cleanliness. A flow control device regulates the gas pressure and flow rate to ensure a stable supply. The clean, dry gas enters the control cabinet, creating positive pressure and carrying away heat.

[0022] Technical advantages:

[0023] High gas quality: Filtration and drying processes ensure the cleanliness of the gas and prevent secondary pollution.

[0024] Stable and reliable gas supply: The flow control device ensures stable gas pressure and flow, maintaining a positive pressure environment.

[0025] Good heat dissipation: Clean gas also acts as a coolant, carrying away the heat inside the control cabinet.

[0026] Furthermore, the pressure control device includes:

[0027] Pressure sensor: Real-time monitoring of gas pressure inside the electrolysis control cabinet;

[0028] Controller: Receives signals from the pressure sensor and controls the flow control device to adjust the gas supply.

[0029] Alarm device: Issues an alarm when pressure is abnormal.

[0030] Working principle:

[0031] A pressure sensor detects the gas pressure inside the control cabinet and transmits the data to the controller. The controller automatically adjusts the opening degree of the solenoid valve according to the set pressure range, increasing or decreasing the gas supply to maintain positive pressure inside the cabinet. When the pressure exceeds the set range, an alarm device prompts the operator to take appropriate action.

[0032] Technical advantages:

[0033] Automated control: Real-time monitoring combined with automatic adjustment ensures that pressure is maintained within the ideal range.

[0034] High safety: It provides timely alarms in case of abnormal situations, avoiding safety hazards caused by excessively high or low pressure.

[0035] Easy to operate: Reduces manual intervention and improves the reliability and efficiency of system operation.

[0036] Furthermore, the sealing components include a sealing door, a sealing joint, and a sealing strip, which are installed at the door, cable inlet, and pipe interface of the electrolysis control cabinet to ensure the airtightness of the control cabinet.

[0037] Working principle:

[0038] Gas leaks are prevented by installing sealing components at various potential leakage points in the control cabinet. Sealing doors utilize sealing strips and locking devices, sealing joints are used for cable and pipe inlets, and sealing strips fill the joint gaps, comprehensively improving the control cabinet's sealing performance.

[0039] Technical advantages:

[0040] Excellent sealing performance: The multi-seal design ensures the good airtightness of the control cabinet, which is the basis for maintaining a positive pressure environment.

[0041] High protection level: Effectively prevents the intrusion of dust, moisture and corrosive gases, protecting internal equipment.

[0042] High durability: Corrosion-resistant materials are used to extend the service life of sealing components.

[0043] Furthermore, the electrolysis control cabinet is equipped with a heat exchanger and an auxiliary heat dissipation device. When the clean gas enters the control cabinet, it passes through the heat exchanger and carries away the heat inside the control cabinet.

[0044] Working principle:

[0045] When clean gas enters the control cabinet, it first passes through a heat exchanger, where it exchanges heat with the heat source inside the cabinet and absorbs heat. Auxiliary heat dissipation devices (such as heat sinks or heat pipes) accelerate the transfer of heat from electrical components to the gas. The heated gas is then discharged under positive pressure, achieving the purpose of cooling.

[0046] Technical advantages:

[0047] High-efficiency heat dissipation: The combination of heat exchangers and auxiliary heat dissipation devices improves heat dissipation efficiency and ensures that the equipment operates at a suitable temperature.

[0048] Compact structure: It utilizes the flow of clean gas to dissipate heat, eliminating the need for an additional cooling system and saving space.

[0049] Energy-saving and environmentally friendly: It reduces electricity consumption and lowers energy costs.

[0050] Furthermore, the auxiliary heat dissipation device is a heat sink or heat pipe installed on the electrical component.

[0051] Working principle:

[0052] Heat sinks increase the surface area of ​​electrical components, while heat pipes utilize the principles of liquid evaporation and condensation to accelerate heat conduction. Both effectively transfer the heat generated by electrical components to the surrounding clean air, achieving rapid heat dissipation when combined with a heat exchanger.

[0053] Technical advantages:

[0054] Significant heat dissipation effect: It dissipates heat directly from the heat source, improving heat dissipation efficiency.

[0055] Extend component life: Reduce the operating temperature of electrical components and reduce failures caused by overheating.

[0056] Easy to install: The heat sink and heat pipes are small in size and easy to install on existing equipment.

[0057] Furthermore, the clean gas is dry and clean compressed air or nitrogen.

[0058] Working principle:

[0059] Dry, clean compressed air or nitrogen is used as the gas supply medium, as it is non-corrosive and highly stable. Nitrogen is also inert, further preventing oxidation reactions. Using these gases to maintain a positive pressure environment ensures the cleanliness and stability of the environment inside the control cabinet.

[0060] Technical advantages:

[0061] High safety: Inert gases such as nitrogen do not support combustion, which improves the safety of the system.

[0062] Anti-oxidation: Reduces the oxidative corrosion of electrical components by oxygen.

[0063] Costs are controllable: Compressed air is readily available, and nitrogen can be selected as needed, offering high flexibility.

[0064] Furthermore, the electrolysis control cabinet is also equipped with a one-way exhaust valve, which is used to discharge excess gas when the internal pressure is too high.

[0065] Working principle:

[0066] When the internal pressure of the control cabinet exceeds the set safety range, the one-way exhaust valve automatically opens to release excess gas, preventing damage to the control cabinet and internal components from excessive pressure. The exhaust valve automatically closes after the pressure returns to normal, maintaining a positive pressure environment.

[0067] Technical advantages:

[0068] Safety protection: Prevents equipment damage and safety accidents caused by overvoltage.

[0069] Automatic adjustment: The system automatically maintains pressure balance without manual intervention.

[0070] High reliability: simple structure, low failure rate, and easy maintenance. Attached Figure Description

[0071] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0072] The following detailed description illustrates the specific implementation method:

[0073] The markings in the accompanying drawings of the instruction manual include: 1-Electrolysis control cabinet; 12-Electrolysis circuit; 13-Sealed door; 14-Heat exchanger; 15-Sealing strip; 17-Pressure sensor; 2-Electrolysis cell; 3-Clean gas source; 4-Control valve; 5-Gas supply pipeline.

[0074] like Figure 1 As shown, an electrolytic cell for treating shale gas produced water includes an electrolytic cell 2 and an electrolytic control cabinet 1. The electrolytic control cabinet 1 is a sealed structure, housing electrical components such as switches, power supplies, and control modules. The positive pressure protection system comprises: a clean gas supply system: a clean gas source 3, providing dry, clean compressed air. Filters and dryers are installed on the gas supply pipeline 5 to filter and dry the gas. The flow control device includes a pressure reducing valve, a flow meter, and a solenoid valve to control the gas pressure and flow rate.

[0075] Pressure control device:

[0076] Pressure sensor 17: Installed on the electrolysis control cabinet 1, it monitors the internal pressure in real time. The controller receives the signal from pressure sensor 17 and controls the opening and closing of the solenoid valve to regulate the gas supply. An alarm device issues an alarm signal when the pressure is abnormal.

[0077] Sealing components:

[0078] Sealed Door 13: The door of electrolysis control cabinet 1 is equipped with sealing strips and locking devices to ensure airtightness. Sealed Joints: Sealed joints are used at cable inlets and pipe interfaces to prevent leakage. Cooling System:

[0079] Heat exchanger 14: Installed inside the electrolysis control cabinet 1, it uses clean gas to remove heat. Auxiliary heat dissipation devices: such as heat sinks or heat pipes, are installed on the heat-generating elements to improve heat dissipation efficiency.

[0080] Working principle:

[0081] Initial pressurization: When the system starts up, the controller opens the solenoid valve, and clean gas enters the electrolysis control cabinet 1 through the gas supply line 5, establishing a positive pressure environment. Pressure maintenance: The pressure sensor 17 monitors the pressure inside the electrolysis control cabinet 1 in real time, and the controller adjusts the opening degree of the solenoid valve according to the pressure changes to maintain the positive pressure range.

[0082] Heat dissipation process: Clean gas circulates in the electrolysis control cabinet 1, passes through the heat exchanger 14, and carries away heat. The auxiliary heat dissipation device 14 improves the heat dissipation effect.

[0083] Preventing corrosive gases from entering: Because the electrolysis control cabinet 1 maintains a positive pressure, external air containing corrosive gases cannot enter, thus protecting the internal electrical components.

[0084] Implementation results:

[0085] Through the above design, this invention effectively prevents corrosive gases from entering the electrolysis control cabinet, extends the service life of electrical components, reduces malfunctions, and improves equipment reliability. Furthermore, the use of clean gas for heat dissipation meets the heat dissipation requirements during the electrolysis process.

[0086] Precautions:

[0087] Gas source selection: Dry and clean compressed air or nitrogen can be used for clean gas, depending on the actual situation.

[0088] Sealing check: After installation, the control cabinet should be tested for sealing to ensure there are no leaks.

[0089] Maintenance: Regularly check the working status of filters, dryers, pressure sensors and controllers, and replace consumables in a timely manner to ensure the normal operation of the system.

[0090] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness or practicality of this utility model. The specific embodiments described in the specification can be used to interpret the claims.

Claims

1. An electrolytic cell for treating shale gas produced water, comprising an electrolytic cell and an electrolysis control cabinet, characterized in that, The electrolysis control cabinet is a sealed structure and is equipped with a positive pressure protection system, which includes: A clean gas supply system is used to supply clean gas into the electrolysis control cabinet; A pressure control device is used to regulate the gas pressure inside the electrolysis control cabinet and maintain it within a preset positive pressure range. Sealing components are installed at each interface of the electrolysis control cabinet to prevent external gas from entering; The clean gas enters the electrolysis control cabinet through the gas supply pipeline, forming a positive pressure environment to prevent external air containing corrosive gases from entering the control cabinet.

2. The electrolytic cell for treating shale gas produced water according to claim 1, characterized in that: The clean gas supply system includes: Clean gas source, providing dry and clean gas; A filter and a dryer are installed on the gas supply line between the clean gas source and the electrolysis control cabinet to filter and dry the gas. The flow control device, including a pressure reducing valve, a flow meter, and a solenoid valve, controls the gas pressure and flow rate entering the electrolysis control cabinet.

3. The electrolytic cell for treating shale gas produced water according to claim 2, characterized in that: The pressure control device includes: A pressure sensor is installed inside the electrolysis control cabinet to monitor the internal gas pressure in real time. The controller receives the signal from the pressure sensor and controls the flow control device to adjust the gas supply. An alarm device that sounds an alarm when the pressure is abnormal.

4. The electrolytic cell for treating shale gas produced water according to claim 1, characterized in that: The sealing assembly includes a sealing door, a sealing joint, and a sealing strip, and is installed at the door, cable inlet, and pipe interface of the electrolysis control cabinet to ensure the airtightness of the control cabinet.

5. The electrolytic cell for treating shale gas produced water according to claim 1, characterized in that: The electrolysis control cabinet is equipped with a heat exchanger and an auxiliary heat dissipation device. When the clean gas enters the control cabinet, it passes through the heat exchanger and carries away the heat inside the control cabinet.

6. The electrolytic cell for treating shale gas produced water according to claim 5, characterized in that: The auxiliary heat dissipation device is a heat sink or heat pipe installed on the electrical component.

7. The electrolytic cell for treating shale gas produced water according to claim 1, characterized in that: The clean gas is dry and clean compressed air or nitrogen.

8. The electrolytic cell for treating shale gas produced water according to claim 1, characterized in that: The electrolysis control cabinet is also equipped with a one-way exhaust valve, which is used to discharge excess gas when the internal pressure is too high.

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