CN213967157U - Device for ensuring spark-free operation of electrofilter - Google Patents
Device for ensuring spark-free operation of electrofilter Download PDFInfo
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- CN213967157U CN213967157U CN202021918537.3U CN202021918537U CN213967157U CN 213967157 U CN213967157 U CN 213967157U CN 202021918537 U CN202021918537 U CN 202021918537U CN 213967157 U CN213967157 U CN 213967157U
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Abstract
The utility model provides a ensure no spark operation's of electrofilter device, it includes step-down sampler group R1, R2, R3 and R4, parallel interface ADC, BUS BUS and the control unit MCU, and it adopts voltage and the synchronous sampling of electric current to realize running state prejudgement, and when the electrofilter voltage dropped and the electric current rose to the predetermined proportion in the unit interval, the device output prejudgement signal was for the power cabinet; the power supply cabinet is dynamically adjusted according to the prejudgment signal, so that the electric filter can operate without sparks. The utility model discloses effectively solved the electrofilter phenomenon of discharging, improved the operating efficiency and the security of electrofilter. The running condition of the electric filter can be judged within extreme time, and the maximum power output of the electric filter is ensured; the device can be matched with any type of power supply for use, and has a wide application range.
Description
Technical Field
The utility model belongs to the technical field of the electrofilter protection, concretely relates to ensure device of electrofilter sparkless operation, it is applicable to the electrofilter use occasion in thermoelectricity, steel, cement, nonferrous smelting, coal coking, chemical industry, electron, flocking and other fields.
Background
Under the action of high voltage, the internal insulation of the electric filter is reduced, and discharge and spark are easy to occur due to factors such as the fluctuation of the power voltage of the electric filter and the change of the mediator of the electric filter. The destructive effect of the high-voltage electric field discharge of the electrofilter is mainly shown in the heating of the device, the mutual impact of charged particles (mainly electrons), the generation of chemical active products or shock waves in the discharge development process and the generation of ionizing radiation, and the surface of the electrode plate of the electrofilter is damaged under the action of the factors, so that the structural change of the material of the electrofilter, such as the damage of polymers, the generation of free radicals and the like, is caused. In addition, the electrical filter operates at a much reduced efficiency when discharged, and causes pollution and loss, and the long spark generation also causes irreversible damage to the electrical filter power supply.
SUMMERY OF THE UTILITY MODEL
Based on the needs of reality and production practice, the applicant invests a lot of funds and long-term research and provides a device for ensuring the sparkless operation of the electric filter, which is suitable for occasions suitable for various electric filters.
According to the technical scheme of the utility model, a device of ensureing no spark operation of electrofilter is provided, its characterized in that, and it adopts synchronous voltage acquisition mode to gather electrofilter voltage and electric current simultaneously, and the control unit MCU is with voltage and electric current data storage and comparison, and the judgement is whether to reach the prejudgement condition.
When the electric filter operates, the device for ensuring the spark-free operation of the electric filter adopts the high-speed parallel interface ADC to synchronously sample a voltage signal and a current signal, ensures the correspondence of the voltage and the current and the timeliness of data, then the MCU performs spark prejudgment according to the voltage signal and the current signal, and dynamically adjusts the power supply parameter of the electric filter to ensure the spark-free operation of the electric filter.
Specifically, the device for ensuring the spark-free operation of the electric filter comprises a voltage reduction sampler group R1, R2, R3 and R4, a parallel interface ADC, a BUS BUS and a control unit MCU, wherein the sampling end of the parallel interface ADC carries out voltage and current value taking through the voltage reduction sampler group R1, R2, R3 and R4, a voltage reduction sampling device R1 is connected with a voltage reduction sampling device R2 in series, and a voltage reduction sampling device R3 is connected with a voltage reduction sampling device R4 in series through the electric filter and then connected with the voltage reduction sampling device R4 in parallel; the middle tap of the voltage-reducing sampling device R1 and the voltage-reducing sampling device R2 is connected with the voltage input end U _ IN of the parallel interface ADC, the middle tap of the electric filter and the voltage-reducing sampling device R4 is connected with the current input end I _ IN of the parallel interface ADC, the common end of the voltage-reducing sampling device R1 and the voltage-reducing sampling device R3 is connected with the high-voltage end HV, and the common end of the voltage-reducing sampling device R2 and the voltage-reducing sampling device R4 is connected with the ground end; the parallel interface ADC is connected with the control unit MCU through a BUS BUS.
Furthermore, the control unit MCU reads the data of the parallel interface ADC in a parallel interface mode, so that the software algorithm and the data conversion time are shortened, and the response rate of the equipment is improved.
In addition, the control unit MCU prejudges the voltage and current signals, and when the voltage drops and the current rises to a certain proportion in unit time, the control unit MCU outputs a prejudgment signal to indicate that the electric filter is about to discharge; meanwhile, the power supply of the electric filter receives the pre-judgment signal to modulate the power supply output, so that the electric filter is ensured to operate without sparks.
Compared with the prior art, the utility model discloses the device of ensureing the no spark operation of electrofilter adopts the synchronous sampling mode of voltage current, effectively solves voltage and current synchronization problem, is convenient for improve the ageing of prejudgement signal. The MCU reads voltage and current data, stores the voltage and current data, compares the voltage and current data with the previous data for a period of time, and judges that sparks are about to be generated if and only if the voltage and the current simultaneously meet preset values.
Drawings
Fig. 1 is a schematic view of the principle of the device for ensuring sparkless operation of an electric filter according to the present invention.
Fig. 2 is a circuit diagram of the pilot logic control of the control unit MCU in fig. 1.
Fig. 3 is a graph of the normal voltage and current waveforms of the electrofilter.
Fig. 4 is a schematic diagram of the pre-determination signal generation condition.
FIG. 5 is a schematic diagram of the voltage and current waveforms for dynamic adjustment of the power supply of the electric filter after generating the predetermined signal.
Figure 6 is a schematic diagram of an electrical filter system incorporating the device of the present invention for ensuring sparkless operation of the electrical filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a device for ensuring the sparkless operation of an electric filter, wherein the sparkless operation device of the electric filter realizes the prejudgment of the operation state by adopting the synchronous sampling of voltage and current, and when the voltage of the electric filter is reduced and the current is increased to the preset proportion in unit time, a control unit MCU outputs a prejudgment signal to a power cabinet; the power supply cabinet dynamically adjusts according to the pre-judging signal to ensure that the electric filter operates without sparks. The utility model discloses effectively solved the electrofilter phenomenon of discharging, improved the operating efficiency and the security of electrofilter. The utility model discloses ensure that the device of the no spark operation of electrofilter can judge the operational aspect of electrofilter in the extreme time, ensure the maximum power output of electrofilter. The device can be matched with any type of power supply for use, and has a wide application range.
The device for ensuring the sparkless operation of the electric filter shown in figure 1 adopts a synchronous voltage acquisition mode to simultaneously acquire the voltage and the current of the electric filter, and the control unit MCU stores and compares the voltage and the current data to judge whether the pre-judgment condition is met. The device for ensuring the spark-free operation of the electric filter adopts the high-speed parallel interface ADC to synchronously sample voltage and current signals when the electric filter operates, ensures the correspondence of the voltage and the current and the timeliness of data, then the MCU performs spark prejudgment according to the signals, and dynamically adjusts a power supply to ensure the spark-free operation of the electric filter.
The device for ensuring the spark-free operation of the electric filter comprises a voltage reduction sampler group R1, R2, R3 and R4, a parallel interface ADC, a BUS BUS and a control unit MCU, wherein the voltage end carries out voltage value taking through the voltage reduction sampler group R1, R2, R3 and R4, R1 is connected with R2 in series, and R3 is connected with R4 through the electric filter in series, and then the two are connected in parallel. The middle tap of the R1 and the R2 is connected with a voltage input end UIN of the parallel interface ADC, the middle tap of the electric filter and the R4 is connected with a current input end IIN of the parallel interface ADC, the common end of the R1 and the R3 is connected with a high-voltage end HV, and the common end of the R2 and the R4 is connected with a ground end. The parallel interface ADC is connected with the control unit MCU through a BUS BUS.
Further as the circuit of the prejudgment logic control of the control unit MCU shown IN FIG. 2, IN the present invention, U _ IN +, U _ IN-is the voltage input port, I _ IN +, - _ IN-is the current input port. CLKP and CLKM are connected to external clock unit for improving module stability. And the voltage and current signals are synchronously sampled by using the high-sampling-rate ADC, so that the accuracy and consistency of the device are ensured. The control unit MCU adopts the parallel interface mode of the STM32 singlechip to read ADC data, shortens the software algorithm and the data conversion time, and improves the response rate of equipment. The control unit MCU prejudges the voltage and current signals, and when the voltage drops and the current rises to a certain proportion in unit time, the control unit MCU outputs a prejudgment signal to indicate that the electric filter is about to discharge. Meanwhile, the power supply of the electric filter receives the signal to adjust the power supply output, so that the electric filter is ensured to operate without sparks.
As shown in fig. 3, the voltage and current waveforms are obtained when the electric filter is in stable sparkless operation, and at this time, the voltage and current do not change drastically, and the device does not output a predetermined signal.
As shown in fig. 4, the current voltage of the electric filter decreases to the preset voltage value and the current increases to the preset current value within the time Δ t, and the MCU outputs the anticipation signal when these conditions are satisfied.
As shown in fig. 5, the power supply of the electric filter receives the predetermined signal before the spark is generated and adjusts the output of the power supply in time to maintain the high-efficiency operation of the electric filter.
As shown in fig. 6, the negative high voltage-HV of the electric filter power supply is connected with the cathode filament, and the grounding end of the electric filter power supply is connected with the anode tube honeycomb and the body grounding pile and is reliably grounded; the inlet flue gas that gets into from the import makes the flue gas take place the ionization under the high-voltage electric field effect that cathode filament produced, and the dust electric charge in the air current is separated with the air current under the effect of electric field, and air molecule is ionized into positive ion and electron in the strong electric field, and the electron runs to anodal in-process and meets the dust particle, makes the dust particle negative electricity absorption positive pole and is collected. The dust-containing gas is electrically separated when passing through a high-voltage electrostatic field, and dust particles and negative ions are combined to be charged negatively and then tend to discharge on the surface of the anode to deposit; the purified flue gas is discharged from the outlet. In the metallurgical, chemical and other industries, electric filter systems utilize electrostatic fields to ionize gases and thereby electrically adsorb dust particles onto electrodes for dust collection, for the purpose of purifying the gases or recovering useful dust particles. The power of the power supply is required to be increased for the electric filter to have the highest efficiency, and the increase of the power supply can cause the electric filter to discharge and increase the spark filter; the utility model discloses a device of no spark operation of electrofilter will ensure the stable no spark operation of electrofilter, improves electrofilter efficiency.
The device for ensuring the spark-free operation of the electric filter adopts voltage and current synchronous sampling, MCU high-speed data reading and voltage and current trend prejudgment. Before the spark of the electric filter is generated, the power supply of the electric filter dynamically adjusts the voltage according to the pre-judging signal, so that the non-spark operation of the electric filter is realized. The device for the sparkless operation of the electric filter adopts isolated power supply, and the prejudgment signal adopts optical fiber to communicate with the power supply cabinet. The device and the power cabinet are ensured to operate stably without high-voltage breakdown danger. The utility model discloses effectively solved the electrofilter phenomenon of discharging, improved the operating efficiency and the security of electrofilter. The running condition of the electric filter can be judged within extreme time, and the maximum power output of the electric filter is ensured; the device can be matched with any type of power supply for use, and has a wide application range.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A device for ensuring spark-free operation of an electric filter is characterized by comprising a step-down sampler group R1, R2, R3 and R4, a parallel interface ADC, a BUS BUS and a control unit MCU, wherein the sampling end of the parallel interface ADC carries out voltage and current value taking through the step-down sampler group R1, R2, R3 and R4, a step-down sampling device R1 is connected with a step-down sampling device R2 in series, and a step-down sampling device R3 is connected with a step-down sampling device R4 in series through the electric filter and then connected with the step-down sampling device in parallel; the middle tap of the voltage-reducing sampling device R1 and the voltage-reducing sampling device R2 is connected with the voltage input end U _ IN of the parallel interface ADC, the middle tap of the electric filter and the voltage-reducing sampling device R4 is connected with the current input end I _ IN of the parallel interface ADC, the common end of the voltage-reducing sampling device R1 and the voltage-reducing sampling device R3 is connected with the high-voltage end HV, and the common end of the voltage-reducing sampling device R2 and the voltage-reducing sampling device R4 is connected with the ground end; the parallel interface ADC is connected with the control unit MCU through a BUS BUS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021918537.3U CN213967157U (en) | 2020-09-05 | 2020-09-05 | Device for ensuring spark-free operation of electrofilter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021918537.3U CN213967157U (en) | 2020-09-05 | 2020-09-05 | Device for ensuring spark-free operation of electrofilter |
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| Publication Number | Publication Date |
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| CN213967157U true CN213967157U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021918537.3U Active CN213967157U (en) | 2020-09-05 | 2020-09-05 | Device for ensuring spark-free operation of electrofilter |
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| CN (1) | CN213967157U (en) |
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- 2020-09-05 CN CN202021918537.3U patent/CN213967157U/en active Active
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