Desulfurization electrical system

Abstract

The invention discloses a desulfurization electrical system, which relates to the field of desulfurization electrical technology, and comprises a power supply cabinet, an amorphous alloy transformer, a frequency converter, an electric energy meter and a DCS (Distributed Control System) decentralized controller, and the power supply input end of the power supply cabinet is connected with the amorphous alloy transformer. According to the electrical desulfurization system, the operating mechanism is arranged to be linked with the limiting mechanism, a handle is pulled to drive a C-shaped rod on a sliding block to synchronously extrude two swing arms, so that when an adjusting column rotates around a rotating pin for the first time, a top block above a tooth holder extrudes the adjusting column to deflect for the second time, and it is ensured that the tail end of a traction arm deflects and moves upwards; and meanwhile, the clamping hook at the front end of the traction arm and the butt joint piece finish unhooking limitation, so that the frequency converter and the base can be quickly separated, the frequency converter can be quickly disassembled, checked and maintained, the maintenance time of the frequency converter can be conveniently shortened, and the frequency converter can quickly perform frequency conversion control on desulfurization electrical equipment after being timely maintained.

Description

Technical Field

[0001] The invention relates to the field of desulfurization electrical technology, in particular to a desulfurization electrical system. Background Art

[0002] Desulfurization generally refers to the process of removing sulfur from fuel before combustion and before flue gas emission, and is one of the important technical measures to prevent and control air pollution. Traditional desulfurization system equipment selection: such as the use of industrial frequency power supply for circulating pumps, multi-stage centrifugal fans or Roots fans for oxidation fans, and silicon steel sheet transformers with secondary energy efficiency for transformers, etc., generally have high energy consumption and high operating costs.

[0003] According to the Chinese patent with the announcement number CN215006364U, a desulfurization electrical control system is disclosed, which uses a DCS control device to remotely and centrally control the bag dust removal device, solenoid valve, inverter, motor, lime milk tank and urea tank in the desulfurization system, so that the status of each desulfurization electrical equipment is fully reflected in the DCS configuration, which significantly improves the automation level of the desulfurization electrical equipment; According to the Chinese patent with the announcement number CN115933559A, a desulfurization variable frequency centrifugal oxidation fan energy-saving optimization control system and method are disclosed. The invention can monitor the desulfurization slurry oxidation performance index online, and through the intelligent adjustment of the frequency of the desulfurization variable frequency centrifugal oxidation fan, it can significantly reduce the energy consumption of the oxidation fan; When the above two technical solutions are in use, both adopt frequency conversion control to drive the electrical equipment for desulfurization to operate, and the operation of the electrical system must be controlled by the frequency converter to lead the speed regulation of the electrical equipment. However, the frequency converter may fail or be damaged during the operation of the entire electrical system. Conventional frequency converters usually use snap-on connections during installation or disassembly, but this snap-on connection method does not allow staff to quickly inspect and maintain the frequency converter. Summary of the invention

[0004] The object of the present invention is to provide a desulfurization electrical system to solve the problems raised by the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a desulfurization electrical system, including a power supply cabinet, an amorphous alloy transformer, a frequency converter, an electric energy meter and a DCS distributed controller, The power input end of the power cabinet is connected to the amorphous alloy transformer, and a frequency converter, an electric energy meter, a DCS distributed controller, a PLC controller and a collection terminal are installed inside the power cabinet. The DCS distributed controller is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the frequency converter. A base installed with the power cabinet is provided on one side of the frequency converter, and docking pieces are symmetrically fixed on the outer edge of the base. An operating mechanism is provided on the frequency converter, and the operating mechanism includes an outer shell and an inner shell installed with the side of the frequency converter by screws. Reservation grooves are provided on adjacent sides of the outer shell and the inner shell, and a limiting mechanism for limiting the docking piece is provided in the reserved groove; The outer side surface of the outer shell is provided with T-shaped grooves in parallel, the outer shell is slidably connected to the slider through the T-shaped groove, and a strip-shaped opening is provided on the surface of the slider, a C-shaped rod is inserted through one side of the slider, a handle is rotatably connected to the outer side of the outer shell, a cylinder is fixed to the side of the handle, the handle is inserted into the strip-shaped opening on the surface of the slider through the cylinder, and the limiting mechanism includes a rotating pin movably connected between the outer shell and the inner shell, a swing arm is fixed to one end of the rotating pin extending through the outer shell, and one end of the swing arm is movably connected to the end of the C-shaped rod.

[0006] Preferably, the power output lines of the power cabinet are respectively connected to an active filtering device for suppressing harmonics and a reactive compensation device for improving the power factor, the output side of the reactive compensation device is connected to a capacitor group, and the power cabinet and the active filtering device are respectively connected to the induced draft fan, oxidation fan, cooling pump and slurry circulation pump of the desulfurization tower through power lines.

[0007] Preferably, a track is installed in the reserved grooves of the outer shell and the inner shell, a gear seat is slidably connected to the track, racks are arranged on both sides of the gear seat, a top block is fixed on the upper side of the gear seat, and a spring a is connected between the gear seat and the track.

[0008] Preferably, the middle part of the rotating pin is movably connected to an adjusting column through a rotating shaft, and the axis of the rotating shaft is parallel to the center line of the adjusting column, an anti-deviation toothed disk is fixed to the side of the rotating pin close to the adjusting column, the locking teeth on the outer edge of the anti-deviation toothed disk are meshed with the rack of the gear seat, a driving block is welded to the outer side of the adjusting column, and the driving block is movably connected to the traction arm.

[0009] Preferably, a groove is provided at one end of the traction arm away from the driving block, and a hook is rotatably connected inside the groove, a cross bar is fixed to the inner wall of the groove, a guide block and a spring b are sleeved on the outer side of the cross bar, and the two ends of the spring b are respectively fixed to the inner wall of the groove and the guide block, and a movable rod is connected between the upper end of the guide block and the hook.

[0010] Preferably, the outer edge of the hook is an arc-shaped structure, and the hooks are distributed at equal intervals at one end of the traction arm, and a movable pin is welded to the lower side of one end of the traction arm close to the groove.

[0011] Preferably, the inner walls of the reserved grooves of the outer shell and the inner shell are provided with slide grooves, the slide grooves are composed of an inclined slideway and a horizontal slideway connected to each other, and the movable pin is plugged into the slide grooves.

[0012] Preferably, a heat dissipation assembly is installed above the inverter, the heat dissipation assembly is composed of a fan and a heat sink, a hanging rod is fixed to the upper edge of the inverter near the heat dissipation assembly, and a socket for docking with the hanging rod is provided at the top edge of the base.

[0013] Preferably, a display screen is installed on the door of the power cabinet, the motors of the induced draft fan, oxidation fan, cooling pump and slurry circulation pump are all controlled by variable frequency speed regulation, the DCS distributed controller is connected to the display screen, and the power meter is used to monitor the power consumption of the load on the desulfurization tower.

[0014] Preferably, the DCS distributed controller is connected to the acquisition terminal via a data line, and the input end of the acquisition terminal is connected to the temperature sensor of the slurry pool at the bottom of the desulfurization tower.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The desulfurization electrical system is provided with an operating mechanism and a limit mechanism in linkage. Pulling the handle drives the C-shaped rod on the slider to squeeze the two swing arms synchronously. When the adjusting column rotates once around the rotating pin, the top block above the gear seat squeezes the adjusting column for secondary deflection, ensuring that the tail end of the traction arm deflects upward and moves. At the same time, the hook at the front end of the traction arm and the docking piece complete the unhooking restriction. At this time, it is convenient to quickly separate the inverter and the base, so that the inverter can be quickly disassembled for inspection and maintenance, which is convenient to shorten the maintenance time of the inverter and enable the inverter to quickly perform frequency conversion control on the desulfurization electrical equipment after timely maintenance; 2. The desulfurization electrical system pushes the inverter to move toward the base, and the front end of the docking piece squeezes the hook, so that the hook squeezes the guide block through the movable rod to stretch the spring b. At this time, the rotating hook will move away from the upper wall of the reserved groove and rotate into the groove of the traction arm. When the docking piece is inserted into the reserved groove of the outer shell and the inner shell, the hook moves up through the reset rebound and locks the docking piece, ensuring that the inverter and the base can be installed quickly and stably, ensuring that the inverter can adjust the speed of the motor according to the load demand after stable installation, so that the induced draft fan, oxidation fan, cooling pump and slurry circulation pump used in the desulfurization tower can operate more energy-efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the electrical distribution structure of the present invention; Figure 2This is a three-dimensional exploded schematic diagram of the power cabinet of the present invention; Figure 3 It is a schematic diagram of the system structure of the present invention; Figure 4 It is a schematic diagram of the circuit structure of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the frequency converter of the present invention; Figure 6 It is a schematic diagram of the three-dimensional exploded structure of the frequency converter of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the operating mechanism of the present invention driving the limiting mechanism and the base locking hook; Figure 8 It is a schematic diagram of the three-dimensional structure in which the operating mechanism of the present invention drives the limiting mechanism to be decoupled from the base; Fig. 9 It is a side view structural schematic diagram of the outer shell and the base being connected to each other in the present invention; Fig.10 It is a schematic diagram of a first three-dimensional exploded structure of the operating mechanism of the present invention; Fig.11 It is a second three-dimensional exploded structural schematic diagram of the operating mechanism of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of the limiting mechanism and the locking hook of the docking piece of the present invention; Fig.13 It is a three-dimensional structural schematic diagram of the limit mechanism of the present invention being decoupled from the docking piece; Fig.14 It is a schematic diagram of the cutaway structure of the traction arm of the present invention.

[0017] In the figure: 1. power cabinet; 2. amorphous alloy transformer; 3. active filter device; 4. reactive power compensation device; 5. capacitor bank; 6. induced draft fan; 7. oxidation fan; 8. cooling pump; 9. slurry circulation pump; 10. inverter; 101. heat dissipation component; 102. base; 103. hanging rod; 104. card seat; 105. docking piece; 11. display screen; 12. electric energy meter; 13. DCS distributed controller; 14. PLC controller; 15. acquisition terminal; 16. operating mechanism; 161. shell body; 162, inner shell; 163, slider; 164, C-shaped rod; 165, handle; 166, swing arm; 167, slide groove; 17, limit mechanism; 171, track; 172, gear seat; 173, top block; 174, spring a; 175, rotating pin; 176, anti-bias toothed disc; 177, adjusting column; 178, driving block; 179, traction arm; 1710, hook; 1711, movable rod; 1712, guide block; 1713, cross bar; 1714, spring b; 1715, moving pin. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 3 , Figure 5 and Figure 6 The present invention provides a technical solution: a desulfurization electrical system, comprising a power supply cabinet 1, an amorphous alloy transformer 2, a frequency converter 10, an electric energy meter 12 and a DCS distributed controller 13, the power input end of the power supply cabinet 1 is connected to the amorphous alloy transformer 2, the power supply cabinet 1 is internally installed with the frequency converter 10, the electric energy meter 12, the DCS distributed controller 13, the PLC controller 14 and the acquisition terminal 15, the DCS distributed controller 13 is communicatively connected with the PLC controller 14, and the PLC controller 14 is electrically connected with the frequency converter 10, one side of the frequency converter 10 is provided with a base 102 installed with the power supply cabinet 1, the outer edge of the base 102 is symmetrically fixed with a docking piece 105, and the frequency converter 10 is provided with an operating The operating mechanism 16 includes an outer shell 161 and an inner shell 162 installed on the side of the inverter 10 by screws. The adjacent sides of the outer shell 161 and the inner shell 162 are provided with reserved grooves, and the reserved grooves are provided with a limiting mechanism 17 for limiting the docking member 105. A heat dissipation component 101 is installed above the inverter 10. The heat dissipation component 101 is composed of a fan and a heat sink. By starting the fan of the heat dissipation component 101, the air flows rapidly along the distribution direction of the heat sink, so as to quickly cool the inverter 10. A hanging rod 103 is fixed to the upper edge of the inverter 10 near the heat dissipation component 101, and a socket 104 docking with the hanging rod 103 is provided at the top edge of the base 102.

[0020] During specific implementation, the base 102 is pre-installed inside the power cabinet 1 by screws, and then the hanging rod 103 on the upper edge of the inverter 10 is clamped in the holder 104 on the upper edge of the base 102, so that the inverter 10 has a hanging placement effect before installation, ensuring that the inverter 10 has positioning and labor-saving effects during installation.

[0021] See also Figure 1 and Figure 4The power output line of the power cabinet 1 is respectively connected to an active filter device 3 for suppressing harmonics and a reactive compensation device 4 for improving the power factor. The output side of the reactive compensation device 4 is connected to a capacitor bank 5. The power cabinet 1 and the active filter device 3 are respectively connected to the induced draft fan 6, the oxidation fan 7, the cooling pump 8 and the slurry circulation pump 9 of the desulfurization tower through power lines; in the desulfurization electrical system, an amorphous alloy transformer 2 is used to reduce energy consumption and improve energy efficiency, and a frequency converter 10 is used to perform frequency conversion speed control on the induced draft fan 6, the oxidation fan 7, the cooling pump 8 and the slurry circulation pump 9. In this electrical system, a The active filter device 3, the reactive power compensation device 4 and the capacitor bank 5 enable the electrical system to reduce energy consumption, suppress harmonics, improve power factor and reduce power outage time, etc., providing strong support for the energy-saving and consumption-reducing operation of the desulfurization system of the power plant, and promoting the energy-saving and consumption-reducing of the system through the adaptive quantum particle swarm optimization (AQPSO) algorithm. The power consumption of the entire desulfurization electrical system is monitored in real time through the power meter 12, which is convenient for the staff to conduct real-time monitoring, which can not only ensure the stability of the desulfurization electrical system and improve the system availability, but also save some energy consumption, thereby greatly reducing the operation cost of the system.

[0022] See also Figure 1-Figure 3 A display screen 11 is installed on the door of the power cabinet 1. The motors of the induced draft fan 6, the oxidation fan 7, the cooling pump 8 and the slurry circulation pump 9 are all controlled by variable frequency speed regulation. The DCS distributed controller 13 is connected to the display screen 11. The electric energy meter 12 is used to monitor the electric energy consumption of the load on the desulfurization tower; the DCS distributed controller 13 is connected to the collection terminal 15 through a data line, and the input end of the collection terminal 15 is connected to the temperature sensor of the slurry pool at the bottom of the desulfurization tower.

[0023] In specific implementation, the DCS distributed controller 13 is a new generation of instrument control system based on a microprocessor, adopting the design principles of decentralized control functions, centralized display operations, and taking into account the design principles of division and autonomy and comprehensive coordination. The DCS distributed controller 13 is used to remotely and centrally control the induced draft fan 6, oxidation fan 7, cooling pump 8, slurry circulation pump 9, inverter 10 and PLC controller 14 in the desulfurization system, so that the status of each desulfurization electrical equipment is fully reflected in the DCS configuration, and the status parameters of the desulfurization electrical equipment are monitored and displayed in real time through the display screen 11 on the power cabinet 1, and the induced draft fan 6, oxidation fan 7, cooling pump 8, slurry circulation pump 9 are automatically controlled through the PLC controller 14, which is convenient for rapid startup or shutdown of the desulfurization electrical equipment. machine; when the flue gas discharged from the boiler enters the desulfurization tower, the temperature of the slurry pool at the bottom of the desulfurization tower is detected by the temperature sensor. When the temperature of the desulfurization slurry is too high, the temperature data is transmitted to the DCS distributed controller 13 through the acquisition terminal 15, and displayed on the display screen 11. At the same time, the DCS distributed controller 13 drives the PLC controller 14 to quickly start the cooling pump 8, so that the cooling pump 8 mixes the coolant with the slurry in the form of a spray, thereby controlling the circulating slurry to a suitable temperature range, facilitating the efficient reaction of the desulfurization slurry and the flue gas.

[0024] See also Figure 5-Figure 14 The outer side surface of the outer shell 161 is parallelly provided with a T-shaped groove, and the outer shell 161 is slidably connected with the slider 163 through the T-shaped groove, and the surface of the slider 163 is provided with a strip-shaped opening, and a C-shaped rod 164 is inserted through one side of the slider 163, and a handle 165 is rotatably connected to the outer side of the outer shell 161, and a cylinder is fixed on the side of the handle 165, and the handle 165 is inserted into the strip-shaped opening on the surface of the slider 163 through the cylinder. The limiting mechanism 17 includes a rotating pin 175 movably connected between the outer shell 161 and the inner shell 162, and a swing arm 166 is fixed to one end of the rotating pin 175 extending through the outer shell 161, and one end of the swing arm 166 is movably connected to the end of the C-shaped rod 164; A track 171 is installed in the reserved grooves of the outer shell 161 and the inner shell 162, a tooth seat 172 is slidably connected to the track 171, racks are arranged on both sides of the tooth seat 172, a top block 173 is fixed on the upper side of the tooth seat 172, and a spring a174 is connected between the tooth seat 172 and the track 171; The middle part of the rotating pin 175 is movably connected with an adjusting column 177 through a rotating shaft, and the axis of the rotating shaft is parallel to the center line of the adjusting column 177. An anti-deflection toothed disc 176 is fixed on the side of the rotating pin 175 close to the adjusting column 177. The anti-deflection toothed disc 176 is a crescent-shaped structure, and the inner side of the anti-deflection toothed disc 176 abuts against the adjusting column 177. The teeth on the outer edge of the anti-deflection toothed disc 176 mesh with the rack of the gear seat 172. A driving block 178 is welded on the outer side of the adjusting column 177, and the driving block 178 is movably connected with the traction arm 179. A groove is provided at one end of the traction arm 179 away from the driving block 178, and a hook 1710 is rotatably connected inside the groove, a cross bar 1713 is fixed to the inner wall of the groove, a guide block 1712 and a spring b1714 are sleeved on the outer side of the cross bar 1713, and both ends of the spring b1714 are respectively fixed to the inner wall of the groove and the guide block 1712, and a movable rod 1711 is connected between the upper end of the guide block 1712 and the hook 1710.

[0025] The outer edge of the hook 1710 is an arc-shaped structure, and the hooks 1710 are evenly spaced at one end of the traction arm 179. A movable pin 1715 is welded to the lower side of the traction arm 179 near one end of the groove; a slide groove 167 is provided on the inner wall of the reserved groove of the outer shell 161 and the inner shell 162, and the slide groove 167 is composed of an inclined slide and a horizontal slide, and the movable pin 1715 is plugged into the slide groove 167.

[0026] During specific implementation, the frequency converter 10 can adjust the speed of the motor according to the load demand, reduce the power consumption of the motor, prevent waste, and make the operation of the induced draft fan 6, oxidation fan 7, cooling pump 8 and slurry circulation pump 9 used in the desulfurization tower more energy-efficient. In addition, the frequency converter 10 can realize gradual start and stop, reduce the impact and stress during start and stop, avoid equipment overload and overheating, and extend the service life of the induced draft fan 6, oxidation fan 7, cooling pump 8 and slurry circulation pump 9; In order to facilitate the quick installation, wiring, debugging and maintenance of the inverter 10 in the power cabinet 1, the operating mechanism 16 and the limit mechanism 17 are arranged to cooperate with each other, so that the inverter 10 and the base 102 can be quickly installed and quickly disassembled. The specific operation is as follows: The base 102 is pre-installed inside the power cabinet 1 by screws, and then the hanging rod 103 on the upper edge of the inverter 10 is clamped in the clamping seat 104 on the upper edge of the base 102, so that the inverter 10 has a hanging display effect before installation, ensuring that the inverter 10 has a positioning and labor-saving effect during installation; then the inverter 10 is pushed toward the base 102, so that the docking piece 105 on the edge of the base 102 is plugged into the reserved grooves of the outer shell 161 and the inner shell 162, and at the same time, the front end of the docking piece 105 will squeeze the arc-shaped outer edge of the hook 1710, so that the hook 1710 rotates into the groove of the traction arm 179, and the rotating hook 1710 will squeeze the guide block 1712 through the movable rod 1711, so that the guide block 17 12 moves forward along the cross bar 1713 and stretches the spring b1714. At this time, the rotating hook 1710 will move away from the upper wall of the reserved groove, so that the docking piece 105 can be inserted into the reserved groove of the outer shell 161 and the inner shell 162; when the docking piece 105 is free from the squeezing of the hook 1710, the spring b1714 resets and contracts to pull the guide block 1712 to slide in the opposite direction on the cross bar 1713, so that the guide block 1712 pushes the movable rod 1711 and the hook 1710 to move upward, ensuring that the hooks 1710 evenly distributed on the traction arm 179 can lock the docking piece 105, so that the hooks 1710 and the docking piece 105 are tightened, ensuring that the inverter 10 and the base 102 have a fast and stable installation effect; When the inverter 10 needs to be disassembled for inspection and maintenance, the handle 165 is pulled to make the cylindrical traction slider 163 on the handle 165 slide along the T-slot, so that the slider 163 will synchronously squeeze the two swing arms 166 on the side of the outer shell 161 through the two ends of the C-shaped rod 164, so that the swing arm 166 will produce a positive deflection. At this time, the swing arm 166 will drive the rotating pin 175 to rotate forward, and the rotating pin 175 clamps the adjusting column 177 through the anti-deflection tooth plate 176 to deflect around the central axis of the rotating pin 175. At this time, the adjusting column 177 can drive the tail end of the traction arm 179 to deflect upward through the driving block 178. When the rotating pin 175 drives the anti-deflection tooth plate 176 to deflect forward, the anti-deflection tooth plate 176 will engage and drive the tooth seat 172 to move along the track 171 and squeeze the spring a174. The tooth seat 17 During the movement, the top block 173 above will squeeze the surface of the adjustment column 177, so that the adjustment column 177 will rotate eccentrically around the rotation axis, ensuring that the adjustment column 177 and the driving block 178 drive the tail end of the traction arm 179 to generate a secondary deflection upward, so that the moving pin 1715 at the front end of the traction arm 179 moves from the inclined slideway of the slide slot 167 to the horizontal slideway, so that the hook 1710 at the front end of the traction arm 179 moves to the bottom of the docking member 105, so that the hook 1710 and the docking member 105 are decoupled, and the inverter 10 and the base 102 can be quickly separated at this time; on the contrary, the handle 165 is released, so that the spring a174 pushes the top block 173 to reset, so that the rotating pin 175 rotates in the opposite direction to reset, so that the swing arm 166 drives the C-shaped rod 164 and the handle 165 to reset and rotate.

[0027] In summary, the induced draft fan 6, oxidation fan 7, cooling pump 8, slurry circulation pump 9, frequency converter 10 and PLC controller 14 in the desulfurization system are remotely and centrally controlled through the DCS distributed controller 13, so that the status of each desulfurization electrical equipment is fully reflected in the DCS configuration, and the frequency converter 10 is used to perform frequency conversion speed control on the induced draft fan 6, oxidation fan 7, cooling pump 8 and slurry circulation pump 9, thereby reducing the power consumption of the desulfurization tower electrical equipment, preventing waste, and ensuring that the desulfurization electrical system has the effect of energy saving and consumption reduction. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A desulfurization electrical system, comprising a power supply cabinet (1), an amorphous alloy transformer (2), a frequency converter (10), an electric energy meter (12) and a DCS distributed controller (13), characterized in that: The power input end of the power cabinet (1) is connected to the amorphous alloy transformer (2); a frequency converter (10), an electric energy meter (12), a DCS distributed controller (13), a PLC controller (14) and a collection terminal (15) are installed inside the power cabinet (1); the DCS distributed controller (13) is communicatively connected to the PLC controller (14), and the PLC controller (14) is electrically connected to the frequency converter (10); and a connection is provided on one side of the frequency converter (10) for connection to the power cabinet (1). A base (102) is installed, a docking piece (105) is symmetrically fixed to the outer edge of the base (102), an operating mechanism (16) is provided on the frequency converter (10), the operating mechanism (16) comprises an outer shell (161) and an inner shell (162) which are installed on the side of the frequency converter (10) by screws, adjacent sides of the outer shell (161) and the inner shell (162) are provided with reserved grooves, and a limiting mechanism (17) for limiting the docking piece (105) is provided in the reserved groove; The outer side surface of the outer shell (161) is provided with a T-shaped groove in parallel, the outer shell (161) is slidably connected to the slider (163) via the T-shaped groove, and the surface of the slider (163) is provided with a strip-shaped opening, one side of the slider (163) is penetrated and plugged with a C-shaped rod (164), the outer side of the outer shell (161) is rotatably connected with a handle (165), the side of the handle (165) is fixed with a cylinder, the handle (165) is plugged with the strip-shaped opening on the surface of the slider (163) via the cylinder, and the limiting mechanism (17) comprises a rotating pin (175) movably connected between the outer shell (161) and the inner shell (162), one end of the rotating pin (175) extending through the outer shell (161) is fixed with a swing arm (166), and one end of the swing arm (166) is movably connected to the end of the C-shaped rod (164).

2. A desulfurization electrical system according to claim 1, characterized in that: The power output lines of the power cabinet (1) are respectively connected to an active filter device (3) for suppressing harmonics and a reactive power compensation device (4) for improving power factor; the output side of the reactive power compensation device (4) is connected to a capacitor bank (5); the power cabinet (1) and the active filter device (3) are respectively connected to an induced draft fan (6), an oxidation fan (7), a cooling pump (8) and a slurry circulation pump (9) of a desulfurization tower via power lines.

3. A desulfurization electrical system according to claim 1, characterized in that: A track (171) is installed in the reserved grooves of the outer shell (161) and the inner shell (162), a tooth seat (172) is slidably connected to the track (171), racks are arranged on both sides of the tooth seat (172), a top block (173) is fixed on the upper side of the tooth seat (172), and a spring a (174) is connected between the tooth seat (172) and the track (171).

4. A desulfurization electrical system according to claim 3, characterized in that: The middle part of the rotating pin (175) is movably connected to an adjusting column (177) via a rotating shaft, and the axis of the rotating shaft is parallel to the center line of the adjusting column (177). An anti-deflection toothed disc (176) is fixed to one side of the rotating pin (175) close to the adjusting column (177), and the teeth on the outer edge of the anti-deflection toothed disc (176) are meshed with the rack of the tooth seat (172). A driving block (178) is welded to the outer side of the adjusting column (177), and the driving block (178) is movably connected to the traction arm (179).

5. A desulfurization electrical system according to claim 4, characterized in that: A groove is formed at one end of the traction arm (179) away from the driving block (178), and a hook (1710) is rotatably connected inside the groove. A cross bar (1713) is fixed to the inner wall of the groove. A guide block (1712) and a spring b (1714) are sleeved on the outer side of the cross bar (1713). Two ends of the spring b (1714) are respectively fixed to the inner wall of the groove and the guide block (1712). A movable rod (1711) is connected between the upper end of the guide block (1712) and the hook (1710).

6. A desulfurization electrical system according to claim 5, characterized in that: The outer edge of the hook (1710) is an arc-shaped structure, and the hooks (1710) are distributed at equal intervals at one end of the traction arm (179). A moving pin (1715) is welded to the lower side of the traction arm (179) close to one end of the groove.

7. A desulfurization electrical system according to claim 6, characterized in that: The inner walls of the reserved grooves of the outer shell (161) and the inner shell (162) are provided with slide grooves (167), the slide grooves (167) being composed of an inclined slideway and a horizontal slideway connected to each other, and the movable pin (1715) is plugged into the slide grooves (167).

8. A desulfurization electrical system according to claim 1, characterized in that: A heat dissipation component (101) is installed above the frequency converter (10), the heat dissipation component (101) being composed of a fan and a heat sink, a hanging rod (103) is fixed to the upper edge of the frequency converter (10) close to the heat dissipation component (101), and a socket (104) is provided at the top edge of the base (102) for docking with the hanging rod (103).

9. A desulfurization electrical system according to claim 2, characterized in that: A display screen (11) is installed on the cabinet door of the power cabinet (1); the motors of the induced draft fan (6), the oxidation fan (7), the cooling pump (8) and the slurry circulation pump (9) are all controlled by variable frequency speed regulation; the DCS distributed controller (13) is connected to the display screen (11); and the electric energy meter (12) is used to monitor the electric energy consumption of the load on the desulfurization tower.

10. A desulfurization electrical system according to claim 9, characterized in that: The DCS distributed controller (13) is connected to the acquisition terminal (15) via a data line, and the input end of the acquisition terminal (15) is connected to a temperature sensor of a slurry pool at the bottom of the desulfurization tower.

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