Electric control dust removal device adopting variable-frequency power supply

Abstract

The utility model discloses an electric control dust removal device adopting a variable-frequency power supply, and relates to the technical field of dust removal equipment, the electric control dust removal device comprises a main control board and a variable-frequency power supply module connected with the main control board, the variable-frequency power supply module is connected with an IGBT module, the IGBT module is connected with an IGBT driving board, the main control board is connected with a wireless communication module, and the output end of the variable-frequency power supply module is connected with an execution module; the power supply frequency is adjustable, so that the electric dust remover can efficiently remove dust according to actual requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal equipment, in particular to an electric-controlled dust removal device adopting a variable-frequency power supply. Background Art

[0002] At present, the electrostatic precipitator system of power plants adopts high-voltage industrial frequency power supply, high-voltage high frequency, high-voltage pulse, and soft-stable power supply modes. The above power supply modes all have different disadvantages, such as low power factor and power efficiency; complex intermittent control; large size, low power efficiency, high heat generation; poor spark tracking characteristics; poor step control accuracy; complex structure, and poor reliability. At the same time, the equipment operation exposed poor adaptability and unstable operation. The main control board, IGBT module, IGBT driver board, damping resistor, power module and other electrical components in the control cabinet are affected by their own quality and the surrounding environment, with a high failure rate, which greatly increases the maintenance workload of personnel and the environmental protection risk of the unit. At the same time, the procurement cost of spare parts for electrical components is expensive and the economy is poor. Utility Model Content

[0003] The embodiment of the present application solves the problem of unstable operation of power equipment in the prior art by providing an electrically controlled dust removal device using a variable frequency power supply, thereby achieving stable operation of the equipment.

[0004] The embodiment of the present application provides an electrically controlled dust removal device using a variable frequency power supply, comprising:

[0005] A main control board, a variable frequency power supply module connected to the main control board, the variable frequency power supply module is connected to an IGBT module, the IGBT module is connected to an IGBT driver board, the main control board is connected to a wireless communication module, and the output end of the variable frequency power supply module is connected to an execution module.

[0006] The variable frequency power supply module also includes: a rectifier bridge, a filter inductor, an inverter and a medium frequency transformer.

[0007] The execution module comprises an electrostatic precipitator connected to the variable frequency power supply module, an output end of the electrostatic precipitator is connected to an air duct, and an output end of the air duct is connected to an induced draft fan.

[0008] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0009] By using variable frequency power supply modules and through technical means such as rectification, filtering, inversion and medium frequency transformation, the power supply frequency can be adjusted, so that the electrostatic precipitator can remove dust efficiently according to actual needs.

[0010] Through the IGBT module and IGBT driver board, precise control of the power module is achieved, further improving the dust removal efficiency and stability.

[0011] Through the wireless communication module, remote monitoring and debugging are realized, making the operation more convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of an electric-controlled dust removal device using a variable frequency power supply according to the utility model;

[0013] Figure 2 This is a schematic structural diagram of a variable frequency power supply module of an electric-controlled dust removal device using a variable frequency power supply according to the utility model;

[0014] Figure 3 This is a schematic diagram of the effect of a variable frequency power supply module of an electric-controlled dust removal device using a variable frequency power supply according to the utility model;

[0015] Figure 4 This is another effect schematic diagram of a variable frequency power supply module of an electric-controlled dust removal device using a variable frequency power supply according to the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of an execution module of an electric-controlled dust removal device using a variable frequency power supply according to the utility model;

[0017] In the figure: 1. main control board; 2. variable frequency power supply module; 3. IGBT module; 4. IGBT driver board; 5. wireless communication module; 6. execution module; 201. rectifier bridge; 202. filter inductor; 203. inverter; 204. medium frequency transformer; 601. electrostatic precipitator 601; 602. air duct 602; 603. induced draft fan. DETAILED DESCRIPTION

[0018] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0019] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] like Figure 1 As shown, the present application discloses an electrically controlled dust removal device using a variable frequency power supply, including a main control board 1, a variable frequency power supply module 2 connected to the main control board 1, the variable frequency power supply module 2 is connected to an IGBT module 3, the IGBT module 3 is connected to an IGBT driving board 4, and the main control board 1 is connected to a wireless communication module 5.

[0022] Preferably, Figure 2 As shown, the variable frequency power supply module 2 also includes: a rectifier bridge 201, a filter inductor 202, an inverter 203 and a medium frequency transformer 204. It adopts an AC→DC→AC→DC conversion method: the three-phase incoming AC voltage is rectified into a DC voltage, and then boosted and rectified after SPWM inversion, and the output voltage ripple factor is less than 5% of a smooth DC high voltage voltage. Compared with the industrial frequency power supply, it can reduce the electric field spark rate and increase the electric field corona power.

[0023] Preferably, the output end of the variable frequency power supply module 2 is connected to an execution module 6, which is responsible for executing the instructions issued by the main control module to realize the dust removal operation.

[0024] Preferably, Figure 5 As shown, the execution module 6 includes an electrostatic precipitator 601 connected to the variable frequency power supply module, the output end of the electrostatic precipitator 601 is connected to the air duct 602, and the output end of the air duct 602 is connected to the induced draft fan 603. The electrostatic precipitator 601 first captures and removes particulate matter in the flue gas, and then the air flows through the air duct 602 to the induced draft fan 603, and the induced draft fan 603 discharges the treated flue gas to the outside.

[0025] Preferably, the variable frequency power supply module 2 is connected to the IGBT module 3 via a driving circuit.

[0026] Preferably, the variable frequency power supply module 2 outputs a feedback signal.

[0027] Preferably, the variable frequency power supply module 2 adopts SPWM variable frequency technology, such as Figure 3 , Figure 4 As shown, the reliability of the variable frequency power supply is greatly improved. Through the SPWM algorithm, the response speed is faster than that of the high-frequency power supply, and the voltage recovery is faster after the electric field flashover, making the power supply system truly highly controllable, reliable and efficient. The variable frequency power supply performs frequency conversion within the frequency range of 50-1000Hz. The frequency conversion technology can ensure the operation of the system, with small switching losses, low back electromotive force, more stable devices and higher system reliability. Accurate spark detection and control make the equipment highly impact-resistant and able to withstand high spark rate conditions. Multiple spark control strategies ensure that the spark energy is small, the electric field quickly restores power supply, and the electric field operates more stably.

[0028] Preferably, the circuit board of the variable frequency power supply module 2 is coated with a three-proof paint, which can achieve the three-proof properties of being moisture-proof, salt spray-proof, and mildew-proof.

[0029] Preferably, the variable frequency power supply module 2 adopts advanced laminated busbar technology to complete the electrical connection between power electronic devices and power circuits. The line distributed inductance is reduced by means of a structure in which the positive and negative electrodes are stacked in parallel, thereby reducing the reverse peak voltage at both ends of the power device, reducing the requirements of the power device for the voltage protection absorption circuit, and improving the reliability and stability of the power device operation.

[0030] The DC output current of the variable frequency power supply module 2 can reach 2.4A, and the DC output voltage can reach more than 100kV for stable operation. The output secondary voltage ripple coefficient is less than 3%, which is much better than the ripple coefficient of 35-45% of the single-phase industrial frequency power supply. It can provide a higher power supply voltage, and the power supply waveform is stable, which can effectively eliminate the energy consumption impact caused by the peaks and troughs of the sinusoidal wave of the single-phase industrial frequency power supply.

[0031] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electrically controlled dust removal device using a variable frequency power supply, characterized in that: include: A main control board (1), a variable frequency power supply module (2) connected to the main control board (1), the variable frequency power supply module (2) connected to an IGBT module (3), the IGBT module (3) connected to an IGBT drive board (4), the main control board (1) connected to a wireless communication module (5), and an output end of the variable frequency power supply module (2) connected to an execution module (6).

2. An electrically controlled dust removal device using a variable frequency power supply as claimed in claim 1, characterized in that: The variable frequency power supply module (2) comprises: a rectifier bridge (201), a filter inductor (202), an inverter (203) and a medium frequency transformer (204).

3. The electric-controlled dust removal device using a variable frequency power supply according to claim 1, characterized in that: The execution module (6) comprises an electrostatic precipitator (601) connected to the variable frequency power supply module, the output end of the electrostatic precipitator (601) is connected to an air duct (602), and the output end of the air duct (602) is connected to an induced draft fan (603).

4. The electric-controlled dust removal device using a variable frequency power supply according to claim 1, characterized in that: The variable frequency power supply module (2) adopts SPWM frequency conversion technology.

5. The electric-controlled dust removal device using a variable frequency power supply according to claim 1, characterized in that: The circuit board of the variable frequency power supply module (2) is coated with three-proof paint.

6. The electric-controlled dust removal device using a variable frequency power supply according to claim 1, characterized in that: The variable frequency power supply module (2) is connected to the IGBT module (3) via a drive circuit.

7. The electric-controlled dust removal device using a variable frequency power supply according to claim 1, characterized in that: The variable frequency power supply module (2) outputs a feedback signal.

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