Multi-mode complex pulse generation method, electric dust removal system, device and storage medium

Abstract

The application discloses a multi-mode complex pulse generation method, an electric dust removal system, equipment and a storage medium. The multi-mode complex pulse generation method comprises the following steps: acquiring the critical electric field intensity, resistivity, current density and relative dielectric constant of a dust layer; calculating the discharge time constant of the dust layer according to the resistivity of the dust layer and the relative dielectric constant of the dust layer; calculating the critical time required to reach the critical electric field intensity according to the discharge time constant of the dust layer, the critical electric field intensity of the dust layer, the resistivity of the dust layer and the current density of the dust layer; and generating a multi-mode complex pulse according to the discharge time constant and the critical time; wherein the output time of a basic voltage is greater than or equal to the discharge time constant, and the output time of a pulse voltage is less than the critical time. The multi-mode complex pulse generation method provided by the embodiment of the application can generate different multi-mode complex pulses according to the operation conditions of the electric dust removal system, which is beneficial to avoiding the generation of reverse corona of the electric dust removal system and improving the dust removal efficiency of the electric dust removal system.

Description

Technical Field

[0001] The present invention relates to the field of dust removal technology, and in particular to a multi-mode compound pulse generation method, an electrostatic precipitator system, equipment and a storage medium. Background Art

[0002] Electrostatic precipitator systems are the leading technology for efficiently controlling flue gas dust in industries such as coal-fired power plants, metallurgy, building materials, and chemicals. High-voltage power supplies, as the core equipment of electrostatic precipitator systems, play a crucial role in supporting the industry's efforts to improve energy conservation and emission reduction. The electrostatic precipitator system operates by applying a high DC voltage between the discharge electrode and the collecting electrode, stimulating a negative corona discharge and generating dense ions. As dust-laden flue gas passes through the electric field, the charged dust particles separate from the airflow under the action of the electric field, migrate toward the collecting electrode, and settle there. Finally, the dust on the collecting electrode is removed through physical methods such as vibration.

[0003] The electrical conductivity of dust has a significant impact on the effectiveness of electrostatic precipitators. If the dust is a good conductor, it will not affect the stability of corona discharge; conversely, high-resistance dust easily leads to charge accumulation, which is difficult to release. As the dust layer thickens, the charge release becomes increasingly difficult. At this time, on the one hand, the dust layer fails to release all the charges, and the surface maintains the same polarity as the corona electrode, repelling subsequent charged dust. On the other hand, due to the slow charge release, a significant potential gradient is formed between the dust particles. When the electric field strength exceeds the critical value, local breakdown will occur within the dust layer, generating positive ions of reverse polarity. These positive ions migrate toward the corona electrode and neutralize the negatively charged particles, which is the back corona phenomenon, resulting in a significant deterioration in the efficiency of the electrostatic precipitator system. Summary of the Invention

[0004] The present invention provides a multi-mode compound pulse generation method, an electrostatic precipitator system, equipment and a storage medium, so as to avoid the generation of back corona in the electrostatic precipitator system and improve the dust removal efficiency of the electrostatic precipitator system.

[0005] According to one aspect of the present invention, a multi-mode compound pulse generation method is provided, which is applied to an electrostatic precipitator system. The electrostatic precipitator system removes dust using a multi-mode compound pulse. The multi-mode compound pulse of the electrostatic precipitator system includes a base voltage and a pulse voltage that alternate with each other. The voltage value of the base voltage is less than the voltage value of the pulse voltage. The multi-mode compound pulse generation method includes:

[0006] Obtain the critical electric field strength, resistivity, current density and relative dielectric constant of the dust layer;

[0007] Calculating a discharge time constant of the dust layer according to the resistivity of the dust layer and the relative dielectric constant of the dust layer;

[0008] Calculating a critical time required to reach the critical electric field strength based on a discharge time constant of the dust layer, a critical electric field strength of the dust layer, a resistivity of the dust layer, and a current density of the dust layer;

[0009] A multi-mode compound pulse is generated according to the discharge time constant and the critical time; wherein the output time of the basic voltage is greater than or equal to the discharge time constant, and the output time of the pulse voltage is less than the critical time.

[0010] Optionally, a specific method for obtaining the critical electric field strength of the dust layer includes:

[0011] Obtaining an average voltage and an average current of the multi-mode compound pulses of the electrostatic precipitator system over a plurality of consecutive time periods;

[0012] Determine the volt-ampere curve of the electrostatic precipitator system during dust removal according to the voltage average value and the current average value;

[0013] The critical electric field strength of the dust layer is determined according to the volt-ampere curve.

[0014] Optionally, a specific method for obtaining the critical electric field strength of the dust layer includes:

[0015] Obtaining a critical current density when the dust layer breaks down;

[0016] The critical electric field strength of the dust layer is calculated according to the critical current density of the dust layer and the resistivity of the dust layer.

[0017] Optionally, after generating a multi-mode compound pulse according to the discharge time constant and the critical time, the method further includes:

[0018] Obtaining the dust concentration emitted by the electrostatic precipitator system;

[0019] determining a maximum output time of the basic voltage in the multi-mode compound pulse according to the emission dust concentration and a preset emission concentration;

[0020] The maximum output time of the basic voltage is used as the actual output time of the basic voltage in the multi-mode compound pulse to correct the multi-mode compound pulse.

[0021] Optionally, the specific method of determining the maximum output time of the basic voltage in the multi-mode compound pulse according to the emission dust concentration and the preset emission concentration includes:

[0022] If the dust emission concentration is lower than the preset emission concentration, increasing the output time of the basic voltage, and taking the output time of the basic voltage when the dust emission concentration is equal to the preset emission concentration as the maximum output time;

[0023] If the dust emission concentration is greater than the preset emission concentration, reducing the output time of the basic voltage, and taking the output time of the basic voltage when the dust emission concentration is equal to the preset emission concentration as the maximum output time;

[0024] If the dust emission concentration is equal to the preset emission concentration, the current output time of the basic voltage is used as the maximum output time.

[0025] According to another aspect of the present invention, an electrostatic precipitator system is further provided, the electrostatic precipitator system comprising: a variable frequency power supply module and a dust removal module;

[0026] The variable frequency power supply module is connected to the dust removal module;

[0027] The variable frequency power supply module is used to execute the multi-mode compound pulse generation method described in any of the above embodiments; the dust removal module is used to perform dust removal based on the multi-mode compound pulse generated by the variable frequency power supply module.

[0028] Optionally, the variable frequency power supply module includes: a frequency conversion unit and a control unit;

[0029] The frequency conversion unit is connected to the dust removal module, and is also connected to the control unit; the control unit is used to control the frequency conversion unit to generate the multi-mode compound pulse.

[0030] Optionally, the variable frequency power supply module further includes: a collection unit;

[0031] The collection unit is connected to the dust removal module, and the collection unit is also connected to the control unit;

[0032] The collecting unit is used to collect the dust concentration emitted by the electrostatic precipitator system.

[0033] According to another aspect of the present invention, a multi-mode complex pulse generating device is provided, the multi-mode complex pulse generating device comprising:

[0034] at least one processor; and

[0035] a memory communicatively connected to the at least one processor; wherein,

[0036] The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to execute the multi-mode complex pulse generation method described in any one of the above embodiments.

[0037] According to still another aspect of the present application, there is also provided a computer readable storage medium storing computer instructions for causing a processor to implement the multi-mode complex pulse generation method of any of the above embodiments when executed.

[0038] The discharge time constant of the dust layer is calculated according to the resistivity of the dust layer and the relative dielectric constant of the dust layer, the critical time required to reach the critical electric field strength is calculated according to the discharge time constant of the dust layer, the critical electric field strength of the dust layer, the resistivity of the dust layer and the current density of the dust layer, and the multi-mode complex pulse is generated according to the discharge time constant and the critical time. The output time of the pulse voltage in the multi-mode complex pulse of the embodiment is less than the generation time of the critical electric field strength, and the output time of the base voltage is greater than or equal to the charge release time of the dust layer, which can generate different multi-mode complex pulses according to the fluctuations of the operation conditions of the electric dust removal system, and is beneficial to avoid the reverse corona of the electric dust removal system and improve the dust removal efficiency of the electric dust removal system.

[0039] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0041] Figure 1 is a flow chart of a multi-mode complex pulse generation method provided by the embodiments of the present application;

[0042] Figure 2 is an equivalent circuit diagram of a dust layer provided by the embodiments of the present application;

[0043] Figure 3 is a waveform diagram of a multi-mode complex pulse provided by the embodiments of the present application;

[0044] Figure 4 is a flow chart of a critical electric field strength acquisition method of a dust layer provided by the embodiments of the present application;

[0045] Figure 5 is a volt-ampere curve diagram of an electric dust removal system during dust removal provided by the embodiments of the present application;

[0046] Figure 6A flow chart of a method for obtaining a critical electric field strength of a dust layer is provided in an embodiment of the present application.

[0047] Figure 7 A flow chart of another multi-mode complex pulse generation method is provided in an embodiment of the present application.

[0048] Figure 8 A schematic diagram of an electric dust removal system is provided in an embodiment of the present application.

[0049] Figure 9 A structural schematic diagram of a multi-mode complex pulse generation device is provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should fall within the scope of protection of the present application.

[0051] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product, or device.

[0052] The embodiment of the present application provides a multi-mode complex pulse generation method. The multi-mode complex pulse generation method is applied to an electric dust removal system, and the electric dust removal system removes dust by the multi-mode complex pulse. The output time of the pulse voltage in the multi-mode complex pulse of the embodiment is less than the generation time of the critical electric field strength, and the output time of the basic voltage is greater than the charge release time of the dust layer, which is conducive to avoiding the generation of reverse corona in the electric dust removal system and improving the dust removal efficiency of the electric dust removal system. Figure 1 A flow chart of a multi-mode complex pulse generation method is provided in an embodiment of the present application. Referring to Figure 1 The multi-mode complex pulse generation method comprises:

[0053] S110, acquire the critical electric field strength, resistivity, current density and relative permittivity of the dust layer.

[0054] Specifically, the critical electric field strength of the dust layer refers to the electric field strength required for the dust layer to reach a reverse corona state in the electric dust removal system. When the electric field strength reaches or exceeds this critical value, partial breakdown of the dust layer occurs, resulting in a decrease in the efficiency of the electric dust removal system. The relative permittivity of the dust layer is a physical parameter that characterizes the dielectric or polarization properties of the dust layer. For example, the relative permittivity of general industrial dust is between 2 and 3. The resistivity of the dust layer is a physical quantity that characterizes the electrical resistance of the dust layer. The current density of the dust layer is the current intensity passing through the dust layer per unit cross-sectional area or unit area.

[0055] The critical electric field strength, resistivity and current density of the dust layer are all related to the thickness of the dust layer in the electric dust removal system. Therefore, in actual application, the critical electric field strength, resistivity and current density of the dust layer need to be measured and acquired after the electric dust removal system is started.

[0056] S120, calculate the discharge time constant of the dust layer according to the resistivity of the dust layer and the relative permittivity of the dust layer.

[0057] Specifically, when dust is collected and accumulated on the electrode plate of the electric dust removal system, the dust layer acts as an insulator. Therefore, the dust layer can be equivalent to a circuit in which resistance and capacitance are connected in parallel. Figure 2 is an equivalent circuit diagram of the dust layer provided by an embodiment of the present application. The discharge time constant is the time constant required for the charge of the dust layer to be completely discharged. Referring to Figure 2 , the discharge time constant can be calculated by the equivalent capacitance and resistance. The resistance in the equivalent circuit diagram can be calculated by the product of the relative permittivity of the dust layer, the vacuum permittivity and the area of the dust layer, divided by the distance between the electrode plates of the electric dust removal system. The capacitance in the equivalent circuit diagram can be calculated by the product of the specific resistance of the dust layer and the distance between the electrode plates of the electric dust removal system, divided by the area of the dust layer. The vacuum permittivity is 8.854187817 x 10 -12 F / m, and the specific resistance of the dust layer can be obtained according to the resistivity of the dust layer. It should be noted that the inverse of the specific resistance is the resistivity. Therefore, the discharge time constant can be calculated by the following formula:

[0058] t0=8.85ρε r x 10 -14 ;

[0059] wherein t0 is the discharge time constant; p is the specific resistance of the dust layer; ε r is the relative permittivity of the dust layer.

[0060] S130. Calculate a critical time required to reach a critical electric field intensity based on a discharge time constant of the dust layer, a critical electric field intensity of the dust layer, a resistivity of the dust layer, and a current density of the dust layer.

[0061] Specifically, the critical time required to reach the critical electric field strength can be calculated by the following formula:

[0062]

[0063] Among them, t1 is the critical time; t0 is the discharge time constant; E d is the critical electric field strength of the dust layer; ρ is the specific resistance of the dust layer; I0 is the current density of the dust layer.

[0064] S140 , generating a multi-mode compound pulse according to the discharge time constant and the critical time; wherein the output time of the basic voltage is greater than or equal to the discharge time constant, and the output time of the pulse voltage is less than the critical time.

[0065] Specifically, the intensity of the electric field between the two plates of the electrostatic precipitator system gradually increases under the action of the pulse voltage, and the intensity of the electric field between the two plates of the electrostatic precipitator system gradually decreases under the action of the base voltage. The discharge time constant is the time constant required for all charges in the dust layer to be released. That is, when the output time of the base voltage is greater than or equal to the discharge time constant, the intensity of the electric field between the two plates of the electrostatic precipitator system gradually decreases from the critical electric field intensity to the electric field intensity provided by the base voltage. Therefore, by controlling the output time of the base voltage to be greater than or equal to the discharge time constant and the output time of the pulse voltage to be less than the critical time, the generation of back corona in the electrostatic precipitator system can be suppressed. In other words, the multi-mode compound pulses required for dust removal by the electrostatic precipitator system can be produced according to the operating conditions of the electrostatic precipitator system to adapt to different dust removal environments or emission standards. For example, the output time of the pulse voltage and the output time of the base voltage in the multi-mode compound pulse can be controlled by a PWM (Pulse Width Modulation) signal or an SPWM (Sine Pulse Width Modulation) signal. Figure 3 This is a waveform diagram of a multi-mode compound pulse provided by an embodiment of the present invention. Figure 3 , wherein the multi-mode compound pulse of the electrostatic precipitator system includes a basic voltage and a pulse voltage that alternate with each other, and the voltage value of the basic voltage is smaller than the voltage value of the pulse voltage.

[0066] The embodiment of the present invention calculates the discharge time constant of the dust layer based on the resistivity of the dust layer and the relative dielectric constant of the dust layer, calculates the critical time required to reach the critical electric field strength based on the discharge time constant of the dust layer, the critical electric field strength of the dust layer, the resistivity of the dust layer, and the current density of the dust layer, and generates a multi-mode compound pulse based on the discharge time constant and the critical time. The output time of the pulse voltage in the multi-mode compound pulse of this embodiment is less than the generation time of the critical electric field strength, and the output time of the basic voltage is greater than or equal to the charge release time of the dust layer. It can generate different multi-mode compound pulses according to the fluctuations in the operating conditions of the electrostatic precipitator system, which is beneficial to avoid the generation of back corona in the electrostatic precipitator system and improve the dust removal efficiency of the electrostatic precipitator system.

[0067] Figure 4 This is a flow chart of a method for obtaining the critical electric field strength of a dust layer provided by an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 4 , the specific methods for obtaining the critical electric field strength of the dust layer include:

[0068] S111. Obtaining an average voltage and an average current of multi-mode compound pulses of the electrostatic precipitator system in multiple continuous time periods.

[0069] Specifically, after the electrostatic precipitator system is started, the electrostatic precipitator system generates a multi-mode compound pulse to perform dust removal. Since the voltage generated by the electrostatic precipitator system during operation is fluctuating, the voltage and current values ​​at different times do not change linearly. Therefore, the mean value of the voltage and the mean value of the current generated by the electrostatic precipitator system in a continuous period of time are calculated, and the voltage mean and the current mean are used as the point value of the electrostatic precipitator system in the period of time. For example, when calculating the mean value of the voltage and the mean value of the current generated by the electrostatic precipitator system in a continuous period of time, the voltage and current of the multi-mode compound pulse of the electrostatic precipitator system can be collected according to a preset frequency, and the voltage mean can be calculated based on the sum of the voltages and the number of collected voltages. The current mean is calculated in the same way as the voltage mean, which will not be repeated here.

[0070] S112. Determine the volt-ampere curve of the electrostatic precipitator system during dust removal based on the average voltage and the average current.

[0071] Figure 5 This is a volt-ampere curve diagram of an electrostatic precipitator system provided by an embodiment of the present invention during dust removal. Figure 5 Specifically, the voltage average value and the current average value correspond one to one, and the volt-ampere curve of the electrostatic precipitator system during dust removal can be drawn based on the obtained voltage average value and current average value.

[0072] S113. Determine the critical electric field strength of the dust layer based on the volt-ampere curve.

[0073] Specifically, when back corona occurs in an electrostatic precipitator system, the voltage between the two plates is partially offset by the reverse voltage of the dust layer due to the back corona of the dust layer. As a result, the voltage between the two plates rises slowly, or even stops rising. This is reflected in the volt-ampere curve as an inflection point. The voltage corresponding to this inflection point can be used to determine the critical electric field strength of the dust layer.

[0074] Figure 6 This is a flow chart of a method for obtaining the critical electric field strength of a dust layer provided by an embodiment of the present invention. Figure 6 , the specific methods for obtaining the critical electric field strength of the dust layer include:

[0075] S114. Obtain the critical current density when the dust layer breaks down.

[0076] Specifically, dust layer breakdown refers to the phenomenon in which, under certain conditions and when the electric field strength is high enough, the dust layer loses its insulating properties and breaks down, becoming conductive. The critical current density is the current per unit area of ​​the dust layer that just causes the dust layer to break down.

[0077] S115. Calculate the critical electric field strength of the dust layer based on the critical current density and resistivity of the dust layer.

[0078] Specifically, according to the integral form of Ohm's law:

[0079] Ed=jdρ;

[0080] Where Ed is the critical electric field strength of the dust layer; jd is the critical current density; and ρ is the resistivity of the dust layer.

[0081] Figure 7 This is a flow chart of another multi-mode compound pulse generation method provided by an embodiment of the present invention. Based on the above embodiments, optionally, refer to Figure 7 , after generating a multi-mode compound pulse according to the discharge time constant and the critical time, it also includes:

[0082] S150: Obtain the dust concentration emitted by the electrostatic precipitator system.

[0083] Specifically, the dust emission concentration is the concentration of dust outputted from the outlet of the electrostatic precipitator system after the electrostatic precipitator system removes dust. For example, the dust emission concentration can be measured by a turbidity meter.

[0084] S160 : Determine the maximum output time of the basic voltage in the multi-mode compound pulse according to the emission dust concentration and the preset emission concentration.

[0085] Specifically, when the dust emission concentration is less than the preset emission concentration, the output time of the basic voltage is increased, and the output time of the basic voltage when the dust emission concentration is equal to the preset emission concentration is used as the maximum output time; when the dust emission concentration is greater than the preset emission concentration, the output time of the basic voltage is reduced, and the output time of the basic voltage when the dust emission concentration is equal to the preset emission concentration is used as the maximum output time; when the dust emission concentration is equal to the preset emission concentration, the current output time of the basic voltage is used as the maximum output time. It should be noted that the preset emission concentration is the maximum dust emission concentration of the electrostatic precipitator system, and can be set according to actual needs in actual application. This embodiment does not impose any restrictions on this.

[0086] S170 , using the maximum output time of the basic voltage as the actual output time of the basic voltage in the multi-mode compound pulse to correct the multi-mode compound pulse.

[0087] Specifically, the intensity of the electric field between the two plates of the electrostatic precipitator system gradually increases under the action of the pulse voltage, and gradually decreases under the action of the base voltage. Under the base voltage, the intensity of the electric field between the two plates of the electrostatic precipitator system decreases, and the electrostatic precipitator system's adsorption of dust decreases, at which point the dust concentration emitted by the electrostatic precipitator system increases.

[0088] On the basis of the above, according to the Doychi formula of electrostatic precipitator collection efficiency:

[0089]

[0090] Among them, e is a constant, A is the plate area; Q is the flue gas volume; ω is the dust driving speed; η is the electrostatic precipitator capture efficiency.

[0091] It can be seen that the electrostatic precipitator collection efficiency is positively correlated with the dust driving speed. According to the dust driving speed calculation formula:

[0092] ω=β·V p ·V m ;

[0093] Among them, ω is the dust driving speed; β is a constant, Vp is the peak value of the pulse voltage, and Vm is the average value of the basic voltage.

[0094] It can be seen that the dust propulsion speed is positively correlated with the product of the peak value of the pulse voltage and the average value of the base voltage. However, the smaller the average base voltage, the lower the power consumption of the electrostatic precipitator system. Therefore, while maintaining the same electrostatic precipitator collection efficiency, reducing the average base voltage and increasing the peak value of the pulse voltage can further reduce the power consumption of the electrostatic precipitator system. It should be noted that the average base voltage is related to the output time and voltage value of the base voltage.

[0095] An embodiment of the present invention also provides an electrostatic precipitator system. Figure 8 Schematic diagram of an electrostatic precipitator system provided by an embodiment of the present invention. Figure 8 The electrostatic precipitator system includes: a variable frequency power supply module 110 and a dust removal module 120.

[0096] The variable frequency power supply module 110 is connected to the dust removal module 120; the variable frequency power supply module 110 is used to execute the multi-mode compound pulse generation method provided in any of the above embodiments; the dust removal module 120 is used to perform dust removal based on the multi-mode compound pulse generated by the variable frequency power supply module 110.

[0097] Among them, the electrostatic precipitator system provided by the embodiment of the present invention has the beneficial effects of the multi-mode compound pulse generation method provided by any of the above embodiments, which will not be repeated here.

[0098] On the basis of the above embodiment, optionally, continue to refer to Figure 8 The variable frequency power supply module 110 includes: a frequency conversion unit 111 and a control unit 112 .

[0099] The frequency conversion unit 111 is connected to the dust removal module 120 , and is also connected to the control unit 112 ; the control unit 112 is used to control the frequency conversion unit 111 to generate multi-mode compound pulses.

[0100] Specifically, the frequency conversion unit 111 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a capacitor C, an inductor L, a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a transformer T, a rectifier bridge B, a first resistor R1, a second resistor R2 and a third resistor R3.

[0101] The anode terminal of the first diode D1 is connected to the cathode terminal of the second diode D2, and the anode terminal of the first diode D1 is also connected to the U phase. The cathode terminal of the first diode D1 is connected to the cathode terminal of the third diode D3, and the anode terminal of the third diode D3 is connected to the cathode terminal of the fourth diode D4, and the anode terminal of the third diode D3 is also connected to the V phase. The anode terminal of the fourth diode D4 is connected to the anode terminal of the second diode D2, and the cathode terminal of the third diode D3 is also connected to the cathode terminal of the fifth diode D5, and the anode terminal of the fifth diode D5 is connected to the sixth diode D4. The cathode end of the first switching tube Q1 is connected to the cathode end of the second switching tube Q2, the anode end of the second switching tube Q2 is connected to the anode end of the fourth diode D4, the anode end of the sixth diode D6 is also connected to the first end of the capacitor C, the second end of the capacitor C is connected to the first end of the inductor L, the second end of the inductor L is connected to the cathode end of the fifth diode D5, the input end of the first switching tube Q1 is connected to the first end of the inductor L, the output end of the first switching tube Q1 is connected to the input end of the second switching tube Q2, the output end of the second switching tube Q2 is connected to the first end of the capacitor C, and the input end of the third switching tube Q3 is connected to the first end of the inductor L. The input end of the switch tube Q1 is connected, the output end of the third switch tube Q3 is connected to the input end of the fourth switch tube Q4, the output end of the fourth switch tube Q4 is connected to the output end of the second switch tube Q2, the control end of the first switch tube Q1, the control end of the second switch tube Q2, the control end of the third switch tube Q3, and the control end of the fourth switch tube Q4 are all connected to the control unit 112, the first end of the transformer T is connected to the output end of the third switch tube Q3, the second end of the transformer T is connected to the output end of the first switch tube Q1, and the third end of the transformer T is connected to the output end of the rectifier bridge B. The first end of the transformer T is connected to the second end of the rectifier bridge B, the third end of the rectifier bridge B is connected to the first end of the first resistor R1, the second end of the first resistor R1 is grounded, the first end of the first resistor R1 is also connected to the control unit 112, the first end of the second resistor R2 is connected to the fourth end of the rectifier bridge B, the second end of the second resistor R2 is connected to the first end of the third resistor R3, the second end of the second resistor R2 is also connected to the control unit 112, the second end of the third resistor R3 is grounded, and the fourth end of the rectifier bridge B is also connected to the dust removal module 120. Among them, the U phase, V phase and W phase are the three phases of the external power supply (such as industrial power).

[0102] On the basis of the above embodiment, optionally, continue to refer to Figure 8 The variable frequency power supply module 110 further includes: a collection unit 113 .

[0103] The collection unit 113 is connected to the dust removal module 120 and is also connected to the control unit 112. The collection unit 113 is used to collect the dust concentration emitted by the electrostatic precipitator system. For example, the collection unit 113 can be a turbidity meter.

[0104] Figure 9: is a structural diagram of a multi-mode complex pulse generating device provided by an embodiment of the present invention. The multi-mode complex pulse generating device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The multi-mode complex pulse generating device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0105] like Figure 9 As shown, the multi-mode complex pulse generating device 10 includes at least one processor 11 and memory, such as a read-only memory (ROM) 12 and a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the ROM 12 or loaded from the storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the multi-mode complex pulse generating device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0106] Multiple components in the multi-mode complex pulse generating device 10 are connected to an I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the multi-mode complex pulse generating device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0107] The processor 11 may be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the multi-mode complex pulse generation method.

[0108] In some embodiments, the multi-mode complex pulse generation method can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the multi-mode complex pulse generation device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the multi-mode complex pulse generation method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the multi-mode complex pulse generation method in any other suitable manner (e.g., by means of firmware).

[0109] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0110] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0111] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0112] To provide interaction with a user, the systems and techniques described herein can be implemented on a multi-mode complex pulse generating device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the multi-mode complex pulse generating device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and the input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0113] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0114] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0115] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0116] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A multi-mode complex pulse generation method, characterized in that: Applied to an electrostatic precipitator system, the electrostatic precipitator system removes dust through a multi-mode compound pulse, the multi-mode compound pulse of the electrostatic precipitator system includes a base voltage and a pulse voltage that alternate with each other, and the voltage value of the base voltage is smaller than the voltage value of the pulse voltage; The multi-mode complex pulse generation method comprises: Obtain the critical electric field strength, resistivity, current density and relative dielectric constant of the dust layer; Calculating a discharge time constant of the dust layer according to the resistivity of the dust layer and the relative dielectric constant of the dust layer; Calculating a critical time required to reach the critical electric field strength based on a discharge time constant of the dust layer, a critical electric field strength of the dust layer, a resistivity of the dust layer, and a current density of the dust layer; A multi-mode compound pulse is generated according to the discharge time constant and the critical time; wherein the output time of the basic voltage is greater than or equal to the discharge time constant, and the output time of the pulse voltage is less than the critical time.

2. The multi-mode compound pulse generation method according to claim 1, characterized in that: The specific methods for obtaining the critical electric field strength of the dust layer include: Obtaining an average voltage and an average current of the multi-mode compound pulses of the electrostatic precipitator system over a plurality of consecutive time periods; Determine the volt-ampere curve of the electrostatic precipitator system during dust removal according to the voltage average value and the current average value; The critical electric field strength of the dust layer is determined according to the volt-ampere curve.

3. The multi-mode compound pulse generation method according to claim 1, characterized in that: The specific methods for obtaining the critical electric field strength of the dust layer include: Obtaining a critical current density when the dust layer breaks down; The critical electric field strength of the dust layer is calculated according to the critical current density of the dust layer and the resistivity of the dust layer.

4. The multi-mode compound pulse generation method according to claim 1, characterized in that: After generating a multi-mode compound pulse according to the discharge time constant and the critical time, the method further includes: Obtaining the dust concentration emitted by the electrostatic precipitator system; determining a maximum output time of the basic voltage in the multi-mode compound pulse according to the emission dust concentration and a preset emission concentration; The maximum output time of the basic voltage is used as the actual output time of the basic voltage in the multi-mode compound pulse to correct the multi-mode compound pulse.

5. The multi-mode compound pulse generation method according to claim 4, characterized in that: The specific method for determining the maximum output time of the basic voltage in the multi-mode compound pulse according to the emission dust concentration and the preset emission concentration includes: If the dust emission concentration is lower than the preset emission concentration, increasing the output time of the basic voltage, and taking the output time of the basic voltage when the dust emission concentration is equal to the preset emission concentration as the maximum output time; If the dust emission concentration is greater than the preset emission concentration, reducing the output time of the basic voltage, and taking the output time of the basic voltage when the dust emission concentration is equal to the preset emission concentration as the maximum output time; If the dust emission concentration is equal to the preset emission concentration, the current output time of the basic voltage is used as the maximum output time.

6. An electrostatic precipitator system, characterized in that: The electrostatic precipitator system includes: a variable frequency power supply module and a dust removal module; The variable frequency power supply module is connected to the dust removal module; The variable frequency power supply module is used to execute the multi-mode compound pulse generation method according to any one of claims 1 to 5; the dust removal module is used to perform dust removal according to the multi-mode compound pulse generated by the variable frequency power supply module.

7. The electrostatic precipitator system according to claim 6, characterized in that: The variable frequency power supply module includes: a frequency conversion unit and a control unit; The frequency conversion unit is connected to the dust removal module, and is also connected to the control unit; the control unit is used to control the frequency conversion unit to generate the multi-mode compound pulse.

8. The electrostatic precipitator system according to claim 7, characterized in that: The variable frequency power supply module further includes: a collection unit; The collection unit is connected to the dust removal module, and the collection unit is also connected to the control unit; The collecting unit is used to collect the dust concentration emitted by the electrostatic precipitator system.

9. A multi-mode complex pulse generating device, characterized in that: The multi-mode complex pulse generating device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to perform the multi-mode complex pulse generation method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the multi-mode complex pulse generation method according to any one of claims 1 to 5 when executed.

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