Explosion-proof electric flue gas treatment device

Abstract

The invention discloses an anti-explosion electric flue gas treatment device which comprises a frame, a power supply and electrical control device and a fan device, the power supply and electrical control device and the fan device are located on the frame, the power supply and electrical control device is electrically connected with the fan device and supplies power to the fan device, and the fan device is arranged on the power supply and electrical control device and supplies power to the fan device. And the fan device is used for performing smoke discharge treatment on the smoke. According to the anti-explosion electric flue gas treatment device, the battery module and the mains supply are used for independently or jointly providing power for the fan device, so that the fan device can efficiently and flexibly work, and through the frequency conversion speed regulation technology, the rotating speed of the anti-explosion motor can be adjusted according to the actual working condition requirement, accurate control over the air volume is achieved, and the smoke exhaust efficiency is improved.

Description

Technical Field

[0001] This invention relates to a flue gas treatment device, and more specifically, to an explosion-proof electric flue gas treatment device for exhausting smoke in explosive environments and toxic and hazardous scenarios. Background Technology

[0002] With the continuous advancement of industrialization, Class I, II, and III explosive environments such as mines, chemical plants, and flour mills generate large amounts of smoke. This smoke is not only toxic and harmful to humans but also poses safety hazards to the environment, easily causing fires and explosions. Furthermore, at fire scenes, the large amounts of dense smoke generated during firefighting can trigger secondary disasters. Therefore, smoke extraction from these areas is necessary. Consequently, providing safe, reliable, energy-efficient, environmentally friendly, and highly automated smoke treatment devices has become an urgent problem to solve. Summary of the Invention

[0003] In view of this, the main objective of the present invention is to provide an explosion-proof electric fume treatment device for exhausting smoke from places where smoke is generated.

[0004] To achieve the above objectives, the present invention provides an explosion-proof electric flue gas treatment device, which includes a frame, a power supply and electrical control device and a fan device located on the frame. The power supply and electrical control device is electrically connected to the fan device and supplies power to the fan device. The fan device is mounted on the power supply and electrical control device and is used to treat flue gas.

[0005] In some embodiments, the fan device includes a fan casing, an impeller, an explosion-proof motor, and a protective net. The impeller is located inside the fan casing and is aligned with the fan casing along the same axis. The center of the impeller is mounted on the shaft of the explosion-proof motor. The explosion-proof motor is driven by a motor driver and drives the impeller to rotate to generate wind pressure. The motor driver is powered by the power supply and electrical control device. The protective net is located on one side of the air inlet of the fan casing.

[0006] In some embodiments, the power supply and electrical control device includes an explosion-proof enclosure, and a battery module, a battery management unit, a charging / discharging unit, and a changeover switch disposed within the explosion-proof enclosure. The negative terminal of the battery module is connected to the motor driver, and the positive terminal of the battery module is connected to one end of the charging / discharging unit. The other end of the charging / discharging unit is connected to the motor driver through the changeover switch. The battery management unit is connected to the battery module and collects the individual cell voltage, temperature, and charge of the battery module. The battery module supplies power to the motor driver through the charging / discharging unit and the changeover switch.

[0007] In some embodiments, the power supply and electrical control device further includes an explosion-proof socket, which is connected to the changeover switch via an AC / DC converter. The explosion-proof socket is connected to mains power, and the explosion-proof socket uses mains power to supply power to the motor driver through the AC / DC converter and the changeover switch.

[0008] In some embodiments, the charging and discharging unit includes a discharging unit and a charging unit connected in parallel. The charging unit includes a charging contactor and a diode D1 connected in parallel, with the cathode of the diode D1 close to the positive terminal of the battery module. The discharging unit includes a discharging contactor and a diode D2 connected in parallel, with the anode of the diode D2 close to the positive terminal of the battery module. One end of the charging contactor and the discharging contactor are connected to the positive terminal of the battery module. The anode of the diode D1 and the cathode of the diode D2 are connected to the changeover switch. The battery management unit controls the opening and closing of the charging contactor and the discharging contactor.

[0009] In some embodiments, the selector switch includes a DC drive mode, an AC drive mode, and a charging mode. The input terminal of the DC drive mode is connected to the end of the charging / discharging unit furthest from the battery module. The input terminal of the AC drive mode is connected to the output terminal of the AC / DC converter. The output terminals of the DC drive mode and the AC drive mode are connected to the motor driver. The output terminal of the AC / DC converter is connected to the input terminal of the charging mode. The output terminal of the charging mode is connected to the end of the charging / discharging unit furthest from the battery module.

[0010] In some embodiments, the explosion-proof electric flue gas treatment device further includes a diode D3, the anode of which is connected to the end of the charging and discharging unit away from the battery module, and the cathode of which is connected to the output terminal of the AC / DC converter.

[0011] In some embodiments, one end of the charging / discharging unit away from the battery module is connected to a heating contactor, and the other end of the heating contactor is connected to the negative terminal of the battery module via a heater. The battery management unit controls the opening and closing of the heating contactor.

[0012] In some embodiments, a Hall sensor is connected between the battery module and the charging / discharging unit. The Hall sensor is used to detect the current magnitude of the battery module during charging and discharging. The Hall sensor is connected to the battery management unit.

[0013] In some embodiments, the frame includes a base, casters located at the bottom of the base, and a push rod located on one side of the base, and the power supply and electrical control device is located on the base.

[0014] The explosion-proof electric flue gas treatment device of the present invention utilizes a battery module and mains power to provide power to the fan device individually or jointly, enabling the fan device to work efficiently and flexibly. Furthermore, through frequency conversion speed regulation technology, the speed of the explosion-proof motor can be adjusted according to actual working conditions, achieving precise control of air volume and improving smoke exhaust efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the explosion-proof electric flue gas treatment device of the present invention; Figure 2 This is a side view of the explosion-proof electric flue gas treatment device of the present invention; Figure 3 This is an electrical circuit diagram showing the connection between the power supply and electrical control device and the motor driver in this invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] The explosion-proof electric fume treatment device of the present invention is used in explosive environments and scenarios where toxic and harmful fumes are present to remove and treat the fumes in the scenario.

[0018] Existing flue gas treatment devices pose safety hazards in explosive environments, and most lack flexible mobility and efficient power management systems. Firstly, existing electric flue gas treatment devices fail to meet the stringent requirements for Class I, II, and III explosive environments in terms of explosion-proof rating and safety, lacking a complete explosion-proof electrical system design. Secondly, the power supply and electrical control systems of existing devices lack flexible power supply mode switching capabilities, unable to simultaneously support free switching between battery power and mains power, limiting the applicability of the equipment under different operating conditions. Thirdly, existing technologies lack integrated battery management and charge / discharge control systems, failing to achieve precise monitoring and intelligent management of battery status. Finally, existing devices are mostly fixed installations, lacking portable and mobile designs, and cannot meet the needs of emergency smoke extraction and flexible operation in multiple locations. These technical deficiencies severely restrict the safe and reliable application of flue gas treatment devices in complex explosive environments. Therefore, this invention provides an explosion-proof electric flue gas treatment device that achieves efficient and flexible smoke extraction through a flexible power supply and electrical control system.

[0019] like Figure 1 and Figure 2 As shown, an explosion-proof electric flue gas treatment device of the present invention includes a frame 1, a power supply and electrical control device 2 and a fan device 3 located on the frame 1. The power supply and electrical control device 2 is electrically connected to the fan device 3 and supplies power to the fan device 3. The fan device 3 is mounted on the power supply and electrical control device 2. The explosion-proof electric flue gas treatment device of the present invention provides power to the fan device 3 through the power supply and electrical control device 2, enabling the fan device 3 to flexibly and efficiently treat flue gas and promptly remove harmful gases.

[0020] In this embodiment of the invention, the fan device 3 includes a fan duct 30, an impeller 31, an explosion-proof motor 32, and a protective net 33. The impeller 31 is located inside the fan duct 30, and the impeller 31 and the fan duct 30 are on the same axial direction. The center of the impeller 31 is mounted on the shaft of the explosion-proof motor 32. The explosion-proof motor 32 is driven by a motor driver 22 (e.g., ...). Figure 3The impeller 31 rotates, generating air pressure, driven by the motor driver 22, which is powered by the power supply and electrical control device 2. A protective net 33 is located on the air inlet side of the air duct 30. In this embodiment, the air duct 30 can be made of stainless steel, which has good corrosion resistance and a smooth inner wall, reducing airflow resistance. The air duct 30 has a cylindrical structure with an air inlet at one end and an air outlet at the other end. An impeller 31 is installed inside to guide airflow and optimize airflow distribution. The impeller 31 and the air duct 30 are aligned along the same axis. The impeller 31 adopts a backward-inclined centrifugal impeller structure, consisting of a disc, blades, and a cover. It can have eight blades with a streamlined design, efficiently drawing gas in radially and discharging it axially. The impeller material is aluminum alloy, dynamically balanced, resulting in low vibration and noise during operation. The protective net 33 is located on one side of the air inlet of the air duct 30. It is made of stainless steel wire mesh with a mesh size of 10 mm × 10 mm, which can effectively block large particles of debris from entering the air duct and protect the impeller and motor from damage. The protective net is detachable for easy cleaning and maintenance.

[0021] The impeller 31 is centrally mounted on the shaft of the explosion-proof motor 32. The explosion-proof motor 32 is driven by the motor driver 22, which in turn drives the impeller 31 to rotate, generating air pressure. The explosion-proof motor 32 is an explosion-proof three-phase DC brushless motor with an IP65 enclosure protection rating, providing excellent explosion-proof performance and enabling safe operation in environments containing flammable gases. IP65 is an international protection rating code used to define the protection capability of electrical equipment enclosures against the intrusion of solid foreign objects and liquids. The motor power can reach 3 kilowatts, with a rated speed of 1450 rpm. It is connected to the impeller 31 via a coupling, ensuring high transmission efficiency and stable and reliable operation. An explosion-proof cable conduit 34 can be connected between the explosion-proof motor 32 and the motor driver 22.

[0022] like Figure 3 As shown, in this embodiment of the invention, the power supply and electrical control device 2 includes a battery module 20, a battery management unit 21, a charging and discharging unit, a transfer switch 24, and an explosion-proof enclosure 29 (e.g., Figure 1As shown, the battery module 20, battery management unit 21, charging / discharging unit, and transfer switch 24 are housed within an explosion-proof enclosure 29, which conforms to the relevant GB / T3836 standard. The negative terminal of the battery module 20 is connected to the motor driver 22, and the positive terminal is connected to one end of the charging / discharging unit. The other end of the charging / discharging unit is connected to the motor driver 22 via the transfer switch 24. The battery management unit 21 is connected to the battery module 20 and collects parameters such as the individual cell voltage, temperature, and charge level of the battery module 20. The battery module 20 supplies power to the motor driver 22 through the charging / discharging unit and the transfer switch 24. In this embodiment, the battery module 20 can adopt a lithium battery pack structure, composed of multiple lithium battery cells connected in series and parallel, featuring high energy density and long service life. The battery management unit 21 monitors the status of the battery module 20 in real time through a built-in voltage detection circuit and temperature sensor. When the battery module 20's temperature is too high or its charge level is too low, the battery management unit 21 will issue an alarm signal and control the relevant contactors to ensure safe battery operation.

[0023] In this embodiment of the invention, the power supply and electrical control device 2 further includes an explosion-proof socket 25. The explosion-proof socket 25 is connected to a changeover switch 24 via an AC / DC converter 26. The explosion-proof socket 25 is connected to mains power, and can use mains power to supply power to the motor driver 22 through the AC / DC converter 26 and the changeover switch 24. The explosion-proof socket 25 adopts an explosion-proof structural design, and the shell material is aluminum alloy, which has good explosion-proof performance and can be used safely in flammable and explosive environments. The AC / DC converter 26 converts the AC power from the mains to DC power, with a stable output voltage and low ripple coefficient, providing a stable DC power supply for subsequent circuits.

[0024] In this embodiment of the invention, the charging and discharging unit includes a discharging unit and a charging unit connected in parallel. The charging unit includes a charging contactor KG1 and a diode D1 connected in parallel, with the cathode of diode D1 close to the positive terminal of the battery module 20. The discharging unit includes a discharging contactor KG2 and a diode D2 connected in parallel, with the anode of diode D2 close to the positive terminal of the battery module 20. One end of the charging contactor KG1 and the discharging contactor KG2 is connected to the positive terminal of the battery module 20, and the anode of diode D1 and the cathode of diode D2 are connected to a changeover switch 24. The battery management unit 21 controls the opening and closing of the charging contactor KG1 and the discharging contactor KG2. In this invention, diodes D1 and D2 play a role in current direction control. Diode D1 ensures that the charging current can only flow from the external power source to the battery module 20, and diode D2 ensures that the discharging current can only flow from the battery module 20 to the load, preventing reverse current flow from causing circuit damage.

[0025] In this embodiment, the selector switch 24 may include three positions: DC drive position 240, AC drive position 241, and charging position 242. The DC drive position 240 includes pins a1, a2, a3, and a4. The input terminals (pins a1 and a2) of the DC drive position 240 are connected to the end of the charging / discharging unit furthest from the battery module 20 (i.e., Figure 3 The anode of diode D1 and the cathode of diode D2 are connected. AC drive mode 241 includes pins b1, b2, b3, and b4. The input terminals (pins b1 and b2) of AC drive mode 241 are connected to the output terminals of AC / DC converter 26. The output terminals (pins a3 and a4) of DC drive mode 240 and the output terminals (pins b3 and b4) of AC drive mode 241 are connected to motor driver 22. Charging mode 242 includes pins c1, c2, c3, and c4. The output terminal of AC / DC converter 26 is connected to the input terminals (pins c1 and c2) of charging mode 242. The output terminals (pins c3 and c4) of charging mode 242 are connected to the end of the charging / discharging unit furthest from battery module 20 (i.e.,...). Figure 3 (The anode of diode D1 and the cathode of diode D2 are shown). In this embodiment of the invention, the selector switch 24 adopts a rotary operating structure, allowing the operator to select different power supply modes according to actual work needs: DC drive mode 241 is used for battery module 20 power supply mode, AC drive mode 241 is used for AC mains power supply mode, and charging mode 242 is used for charging battery module 20 via AC mains power. Each mode has a clear label and positioning mechanism to ensure accurate and reliable operation. In this embodiment of the invention, when the selector switch 24 is working, one mode can be selected for operation, while the other two modes are idle and in a non-working state. For example, if the DC drive mode is closed, the AC drive mode and the charging mode are disconnected and in a non-working state.

[0026] In this embodiment of the disclosure, the explosion-proof electric flue gas treatment device further includes a diode D3, the anode of which is connected to the end of the charging and discharging unit away from the battery module 20 (i.e., Figure 3 The anode of diode D1 is connected to the cathode of diode D2, and the cathode of diode D3 is connected to the output terminal of AC / DC converter 26. Diode D3 serves as a power switching protection. When both AC mains power and battery power are available, AC mains power is converted to DC power by AC / DC converter 26 and then used to power motor driver 22 via AC drive switch 241. Battery module 20 powers motor driver 22 via discharge unit, diode D3, and AC drive switch 241. This ensures that current flows along a predetermined path, prevents circulating current between the two power sources, and protects the circuit.

[0027] The working principle of the explosion-proof electric flue gas treatment device of the present invention is as follows: When flue gas treatment is required, the operator first turns on the power switch S1 (e.g., Figure 3 As shown), at this time, relay KG2F (such as...) can be used. Figure 3 (As shown) The motor driver 22 is turned on synchronously, and then the appropriate power supply mode is selected through the changeover switch 24. The motor driver 22 controls the operation of the explosion-proof motor 32, which drives the impeller 31 to rotate at high speed. Under the action of centrifugal force, the impeller 31 draws the surrounding flue gas into the air duct 30 from the air inlet. After being accelerated and pressurized by the impeller 31, the flue gas is discharged at high speed from the air outlet, realizing the effective emission and treatment of flue gas.

[0028] When the selector switch 24 selects the battery power supply mode, it closes the DC drive position 240 and disconnects the AC drive position 241 and the charging position 242. The battery management unit 21 controls the charging contactor KG1 to open and the discharging contactor KG2 to close. The battery module 20 supplies power to the motor driver 22 through the discharging contactor KG2, diode D2, and DC drive position 240, driving the explosion-proof motor 32 to rotate. The battery management unit 21 monitors the status of the battery module 20 in real time to ensure stable power supply. When the battery module 20 is low on power, the battery management unit 21 controls the charging contactor KG1 to close, controls the discharging contactor KG2 to open, and switches the selector switch 24 to the charging mode, closing the charging position 242 and disconnecting the DC drive position 240 and the AC drive position 241. At this time, the AC mains power obtained by the explosion-proof socket 25 is converted into DC power by the AC / DC converter 26 and charges the battery module 20 through the charging position 242, diode D1, and charging contactor KG1. When the battery management unit 21 detects that the battery module 20 is fully charged, it controls the charging contactor KG1 to open, stopping the charging of the battery module 20. In this invention, a mains power supply mode can be selected. The AC drive switch 241 is closed, and the DC drive switch 240 and charging switch 242 are disconnected. The mains power is converted to DC power by the AC / DC converter 26, and then the AC drive switch 241 powers the motor driver 22, driving the explosion-proof motor 32 to rotate. In this embodiment, a mode where both mains power and battery power are used can be selected. In this case, the AC drive switch 241 is closed, and the DC drive switch 240 and charging switch 242 are disconnected. The battery management unit 21 controls the discharge contactor KG2 to close. The mains power is converted to DC power by the AC / DC converter 26, and then the AC drive switch 241 powers the motor driver 22. Simultaneously, the battery module 20 powers the motor driver 22 through the discharge unit (discharge contactor KG2, diode D2), diode D3, and AC drive switch 241. Therefore, when using a power supply mode that combines mains power and television power, the battery module 20 needs to be powered through the branch of diode D3 to ensure that the current flows along the predetermined path, so that the explosion-proof motor 32 can work flexibly and efficiently.

[0029] In embodiments of the present invention, such as Figure 3As shown, the end of the charging / discharging unit furthest from the battery module 20 can be connected to a heating contactor KG3. The other end of the heating contactor KG3 is connected to the negative terminal of the battery module 20 via a heater 23. The battery management unit 21 controls the opening and closing of the heating contactor KG3. The heater 23 uses a positive temperature coefficient (PTC) ceramic heating element, which has self-limiting temperature characteristics. When the ambient temperature is low, the battery management unit 21 controls the heating contactor KG3 to close, providing appropriate heating to the battery module 20, ensuring that the battery module 20 can still operate normally in low-temperature environments, and improving the battery's discharge efficiency and service life.

[0030] In this embodiment of the invention, a Hall sensor 27 may be connected between the battery module 20 and the charging / discharging unit. The Hall sensor 27 is used to detect the current magnitude of the battery module 20 during charging and discharging. The Hall sensor 27 is connected to the battery management unit 21. It adopts a non-contact current detection principle, measuring the current magnitude by detecting changes in the magnetic field around the conductor, and features high accuracy and fast response. When an abnormal charging / discharging current is detected, the Hall sensor 27 transmits a signal to the battery management unit 21, which then adjusts the charging / discharging strategy or disconnects the circuit connection accordingly.

[0031] In embodiments of the present invention, such as Figure 3 As shown, the motor driver 22 can control the forward and reverse rotation of the explosion-proof motor 32 via the rotary switch S2. Simultaneously, employing variable frequency speed control technology, the motor speed can be adjusted according to actual working conditions, such as... Figure 3 As shown, the speed of the explosion-proof motor 32 can be adjusted using potentiometer R1 to achieve precise control of the air volume. The motor driver 22 has built-in overload protection, short circuit protection, and over-temperature protection functions. When an abnormality is detected, it will automatically cut off the power supply to protect the explosion-proof motor and the safety of the entire system.

[0032] In this invention, a fuse F1 can be connected between the battery module 20 and the charging / discharging unit to provide power-off protection. The battery management unit 21 can be connected to a display screen 28 to display the current, remaining charge, voltage, and temperature of the battery module 20.

[0033] In embodiments of the present invention, such as Figure 1 and Figure 2As shown, the frame 1 includes a base 10, casters 11 located at the bottom of the base 10, and a push rod 12 located on one side of the base 10. The power supply and electrical control device 2 is mounted on the base 10. The base 10 provides a stable support foundation for the entire device, and its upper surface is provided with mounting holes and fixing grooves for mounting and fixing the power supply and electrical control device 2 and the fan device 3. The casters 11 are installed at the four corners of the bottom of the base 10. Each caster 11 adopts a swivel wheel structure, enabling omnidirectional rotation and giving the entire device good mobility, facilitating rapid transfer between different workplaces. The push rod 12 is fixed to one edge of the base 10, adopts an ergonomic design, and has a surface covered with anti-slip material. Operators can easily push the entire device to a designated position using the push rod 12.

[0034] The explosion-proof electric fume treatment device of this invention utilizes a battery module and mains power, either individually or in combination, to provide power to the fan unit, enabling the fan unit to operate efficiently and flexibly. Furthermore, through variable frequency speed control technology, the speed of the explosion-proof motor can be adjusted according to actual working conditions, achieving precise airflow control and improving smoke extraction efficiency. For locations requiring fume treatment, it can meet the maintenance and production needs of Class I, II, and III explosive environments. It can not only remove fumes from toxic and hazardous areas but also be used for fire-fighting smoke extraction.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An explosion-proof electric flue gas treatment device, characterized in that, It includes a frame, a power supply and electrical control device and a fan device located on the frame, the power supply and electrical control device being electrically connected to the fan device and supplying power to the fan device, the fan device being mounted on the power supply and electrical control device, and the fan device being used for exhaust treatment of flue gas.

2. The explosion-proof electric flue gas treatment device according to claim 1, characterized in that, The fan unit includes a fan casing, an impeller, an explosion-proof motor, and a protective net. The impeller is located inside the fan casing and is on the same axis as the fan casing. The center of the impeller is mounted on the shaft of the explosion-proof motor. The explosion-proof motor is driven by a motor driver and drives the impeller to rotate to generate wind pressure. The motor driver is powered by the power supply and electrical control device. The protective net is located on one side of the air inlet of the fan casing.

3. The explosion-proof electric flue gas treatment device according to claim 2, characterized in that, The power supply and electrical control device includes an explosion-proof enclosure, and a battery module, a battery management unit, a charging / discharging unit, and a changeover switch disposed within the explosion-proof enclosure. The negative terminal of the battery module is connected to the motor driver, and the positive terminal of the battery module is connected to one end of the charging / discharging unit. The other end of the charging / discharging unit is connected to the motor driver through the changeover switch. The battery management unit is connected to the battery module and collects the individual cell voltage, temperature, and charge of the battery module. The battery module supplies power to the motor driver through the charging / discharging unit and the changeover switch.

4. The explosion-proof electric flue gas treatment device according to claim 3, characterized in that, The power supply and electrical control device also includes an explosion-proof socket, which is connected to the changeover switch via an AC / DC converter. The explosion-proof socket is connected to mains power, and the explosion-proof socket uses mains power to supply power to the motor driver through the AC / DC converter and the changeover switch.

5. The explosion-proof electric flue gas treatment device according to claim 3, characterized in that, The charging and discharging unit includes a discharging unit and a charging unit connected in parallel. The charging unit includes a charging contactor and a diode D1 connected in parallel. The cathode of the diode D1 is close to the positive terminal of the battery module. The discharging unit includes a discharging contactor and a diode D2 connected in parallel. The anode of the diode D2 is close to the positive terminal of the battery module. One end of the charging contactor and the discharging contactor are connected to the positive terminal of the battery module. The anode of the diode D1 and the cathode of the diode D2 are connected to the changeover switch. The battery management unit controls the opening and closing of the charging contactor and the discharging contactor.

6. The explosion-proof electric flue gas treatment device according to claim 4, characterized in that, The selector switch includes a DC drive mode, an AC drive mode, and a charging mode. The input terminal of the DC drive mode is connected to the end of the charging / discharging unit furthest from the battery module. The input terminal of the AC drive mode is connected to the output terminal of the AC / DC converter. The output terminals of the DC drive mode and the AC drive mode are connected to the motor driver. The output terminal of the AC / DC converter is connected to the input terminal of the charging mode. The output terminal of the charging mode is connected to the end of the charging / discharging unit furthest from the battery module.

7. The explosion-proof electric flue gas treatment device according to claim 4, characterized in that, The explosion-proof electric flue gas treatment device also includes a diode D3, the anode of which is connected to the end of the charging and discharging unit away from the battery module, and the cathode of which is connected to the output terminal of the AC / DC converter.

8. The explosion-proof electric flue gas treatment device according to claim 3, characterized in that, The charging / discharging unit is connected to a heating contactor at one end away from the battery module, and the other end of the heating contactor is connected to the negative terminal of the battery module via a heater. The battery management unit controls the opening and closing of the heating contactor.

9. The explosion-proof electric flue gas treatment device according to claim 3, characterized in that, A Hall sensor is connected between the battery module and the charging / discharging unit. The Hall sensor is used to detect the current of the battery module during charging and discharging. The Hall sensor is connected to the battery management unit.

10. The explosion-proof electric flue gas treatment device according to claim 1, characterized in that, The frame includes a base, casters located at the bottom of the base, and a push rod located on one side of the base. The power supply and electrical control device is located on the base.

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