526results about "Electric supply techniques" patented technology

An automatic control method and system for an electrostatic precipitation system. The method combines a neural network control algorithm with a PID regulation control algorithm, and uses the neural network control algorithm to carry out preprocessing on the control of the electrostatic precipitation system and uses the PID regulation control algorithm to carry out initialization processing when the electrostatic precipitation system is out of control, thereby avoiding the uncontrollable state of the electrostatic precipitation system caused by PID control overshoot or oscillation; moreover, the PID regulation control algorithm is used to carry out real-time tracking regulation on the electrostatic precipitation system, so that the real-time response speed of intelligent control of the electrostatic precipitation system can be effectively increased. Therefore, the energy conservation and efficiency improvement of the electrostatic precipitation system are better realized while the operation stability and response rapidness of an electric precipitator are ensured and controlled. By combining the two control algorithms, once intelligent control is used, the automatic control method effectively prevents the electrostatic precipitation system from being temporarily out of control due to excessive overshoot, thereby ensuring the stable operation of the electrostatic precipitation system, and implementing intelligent control.

The invention relates to a coal-fired unit electrostatic dust collection energy-saving optimization method, system and equipment and a storage medium, and the method comprises the steps: obtaining historically collected system operation data of a coal-fired unit electrostatic dust collection system, and constructing an outlet NOx concentration prediction model and an outlet dust concentration dynamic model according to the system operation data; power optimization control strategies of high-voltage power supplies of all levels of electric fields in the dust removal system are obtained, a model is built based on the outlet NOx concentration prediction model, the outlet dust concentration dynamic model and the optimization control strategies, and an electrostatic dust removal energy-saving optimization model is obtained; acquiring a preset environment-friendly standard concentration, and analyzing the environment-friendly standard concentration through the electrostatic dust collection energy-saving optimization model to obtain an optimal dust collection parameter; and adjusting the current or voltage of each level of electric field in the dust removal system according to the optimal dust removal parameters. Through the constructed energy-saving optimization model, the electrostatic dust collection control system can reduce the dust emission concentration and meet the pollutant emission standard, and meanwhile, the energy consumption of the electric dust collector can be greatly reduced.

The embodiment of the invention provides an intelligent electric precipitation system. The intelligent electric precipitation system comprises a power management module, a working condition sensing module, a dynamic optimization module and a cooperative control module, the power supply management module comprises a high-frequency power supply unit and a power-frequency power supply unit, and the high-frequency power supply unit adopts a full-bridge series-parallel hybrid resonance circuit; the working condition sensing module is configured with a distributed sensor network; the dynamic optimization module establishes a multi-objective optimization model; the cooperative control module realizes a four-level control architecture; the system realizes optimal balance of dust removal efficiency and energy consumption by collecting working condition parameters in real time and dynamically adjusting working parameters of a power supply. According to the intelligent electric dust removal system, through a hybrid power supply framework, a multi-sensor network and four-stage cooperative control, the dust removal efficiency is improved, and the equipment reliability and the intelligent level are improved.

Provides a dust collector capable of being installed even in small spaces and capable of collecting dust efficiently. A dust collector 1 includes a first electrode layer 12 formed of a conductor, a second electrode layer 14 formed of a conductor, having sufficient size to cover the first electrode layer 12 in planar view, having lacking parts (through holes 14H, slits 14S) piercing therethrough in a thickness direction, having sufficient size to cover the first electrode layer 12 in planar view, and placed interfacing the first electrode layer 12, and an insulating layer (a first insulating layer 13, a second insulating layer 15) formed of an insulative material, insulating the first electrode layer 12 and the second electrode layer 14, and forming a single merged layer structure with the first electrode layer 12 and the second electrode layer 14.

The utility model belongs to the field of dust removal and environmental protection of a coal-fired power plant, and particularly relates to a pre-charged adjustable high-voltage wire inlet system of an electric precipitator, which comprises a pre-charged device and a wall bushing which are arranged at the front end of the electric precipitator, the pre-charged device is provided with a high-voltage power supply, and the high-voltage power supply is provided with a double-switch disconnecting link and is connected with an insulating pillar through a high-voltage lead. Every two adjacent insulation supporting columns are connected through a rigid material, and the last insulation supporting column is connected with a wall bushing on a wall plate through a high-voltage wire and then connected with a pre-charging device to conduct power supply. According to the utility model, one high-voltage power supply is used for supplying power to the pre-charging devices arranged on the two or more loudspeakers, each pre-charging device can be independently disconnected without influencing the normal operation of other pre-charging devices and an electric field under the condition that a main power supply is not cut off, and on the premise that the pre-charging devices normally operate the required high-voltage power supply, the pre-charging devices can be independently disconnected. The construction cost is greatly saved, and the market competitiveness is improved.

The invention relates to the field of sintering machine head electrostatic dust collection, and provides a sintering machine head electrostatic dust collection system which comprises an airflow homogenization unit, an electric field dust collection unit, a high-frequency pulse power supply unit, an intelligent control unit and a dust concentration detector. The airflow homogenization unit is arranged in front of the electric field dust removal unit; the high-frequency pulse power supply unit is in signal connection with the electric field dedusting unit; the intelligent control unit is in signal connection with the electric field dedusting unit and used for controlling the voltage of the electric field dedusting unit; the dust concentration detector is arranged at the outlet position of the electric field dust removal unit, and is used for detecting the outlet dust concentration of the flue gas at the outlet position of the electric field dust removal unit and sending the outlet dust concentration to the intelligent control unit; the intelligent control unit is in signal connection with the high-frequency pulse power supply unit, and when the outlet dust concentration is larger than 20 mg / Nm, the pulse mode of the high-frequency pulse unit is activated, the invention further provides an electrostatic dust collection method for the sintering machine head, and the effect of improving the electrostatic dust collection efficiency and effect is achieved.

The invention provides an intelligent dust remover control method and system based on electrostatic adsorption. The method comprises the following steps: acquiring dust concentration, temperature and humidity and particulate matter impedance spectrum data of a working environment, screening key measurement points, applying an alternating electric field to obtain an impedance phase difference map, performing frequency spectrum consistency verification on the impedance phase difference map and the impedance spectrum data after temperature and humidity compensation, and calculating conductivity discrimination parameters of dust with different particle sizes; deploying a parallel metal plate adsorption array containing an insulating dielectric layer, and adjusting the plate spacing to change the electric field intensity; generating a resistivity space distribution thermodynamic diagram based on the conductivity discrimination parameters, and cooperating with drive board spacing adjustment and voltage output according to the resistance gradient change of the insulation and conductive dust gathering area and the migration path; and a measurement point location screening strategy is updated in combination with the spacing adjustment amplitude and the voltage change rate, and the impedance spectrum precision is optimized. Precise identification of insulation and conductivity multi-mode dust and dynamic electric field self-adaptive adsorption are achieved, the dust removal efficiency of a complex environment is improved, and energy consumption is reduced.

An air filter for an air filter assembly in an air conditioner is provided, in particular for filtering out particles, preferably pollutants, from air. The air filter contains a filter element with an electrically conductive layer. The air filter also has a housing that partially encompasses a housing interior into which the filter element is inserted. The air filter also has a terminal on the housing that can be contacted from outside the housing interior, which is made of an electrically conductive material and is connected to the conductive layer of the filter element.

The utility model relates to the technical field of coal gas purification equipment, in particular to an electrical tar precipitator insulating device without introducing nitrogen. Comprising a body, an upper hanging bracket, a hanging rod, an umbrella-shaped cover, a cylinder body, a spraying pipe, a connecting cylinder and an insulating box, the connecting cylinder is fixedly connected to the top of the body, and the bottom extends into the body; the barrel is fixedly connected to the bottom of the connecting barrel; the umbrella-shaped cover is fixedly connected to the bottom of the barrel; the top end of the suspender is fixedly connected into the insulation box, and the bottom end of the suspender extends out of the umbrella-shaped cover; the umbrella-shaped cover and the cylinder body are made of insulating polytetrafluoroethylene, the surfaces of the umbrella-shaped cover and the cylinder body are modified into oleophobic structures or oleophobic coatings, and the umbrella-shaped cover and the cylinder body are used for sealing the lower portion of the insulating device so that coal gas cannot enter the insulating device and are insulated so that the insulating device does not need to be filled with nitrogen. Nitrogen is not introduced into an insulation box, so that energy is saved, gas purity is guaranteed, and stable operation of equipment is guaranteed.

The invention relates to the technical field of electrostatic dust collection and discloses an accurate frequency adjustment method for an intelligent frequency modulation high-voltage power supply of an electrostatic dust collector. The method comprises the steps of collecting voltage signals with frequency fluctuation in operation of a high-voltage power supply to form a voltage sequence; dividing period segments by using wave crest distribution in the voltage sequence, and clustering to obtain adjustment subsequences; obtaining a trend fluctuation index based on local signal change trend fluctuation and signal differences of the adjustment subsequences, and obtaining an amplitude drop difference and an amplitude interval difference according to an amplitude change trend difference and an amplitude bit sequence change trend difference; obtaining a period stability coefficient by combining the difference, the average condition of the trend fluctuation index and the average condition of the sub-sequence similarity; constructing a Hankel matrix and performing singular value decomposition, and obtaining a main component proportion and a difference index based on a singular value condition; and according to the Hankel matrix line data correlation, the period stability coefficient, the main component proportion and the difference index, obtaining a signal stability index, and according to the signal stability index, accurately adjusting the high-voltage power supply frequency.

The present invention relates to the technical field of anti-haze screen window, in particular to a high-safety electrostatic anti-haze screen window system, comprising an outer yarn and a high-voltage generator, wherein the outer yarn comprises a plurality of conductive wires, and the output end of the high-voltage generator is connected to the conductive wire by a first resistor element in series, so that after the high-voltage generator is powered on, the conductive wire generates electrostatic adsorption or repulsion to suspended particles in the adjacent air, and utilizes the electrostatic field generated by the conductive wire of the outer yarn after the high-voltage generator is powered on to induce polarization of neutral suspended particles in the air adjacent to the conductive wire, so that the particles are adsorbed on the conductive wire, and the content of haze particles such as PM 2.5 in the air entering the room is greatly reduced; the first resistor element in series ensures that when a human body approaches or touches the outer yarn, the discharge of the accumulated charge inside the high-voltage generator to the human body can be ignored. The present invention has the advantages of achieving high-efficiency anti-haze and dust prevention at low cost and low energy consumption, while ensuring safety in use.

The invention relates to the technical field of dust removal equipment, in particular to a two-dimensional airflow efficient electric dust remover. The two-dimensional airflow high-efficiency dust remover comprises an acquisition module used for acquiring particulate matter concentration data at a flue gas outlet of the two-dimensional airflow high-efficiency dust remover; and the control module is used for controlling the working state data of the two-dimensional airflow high-efficiency electric precipitator according to the particulate matter concentration data at the flue gas outlet of the two-dimensional airflow high-efficiency electric precipitator. The power supply voltage of the corona wire is adjusted in real time according to the particulate matter concentration data at the flue gas outlet of the two-dimensional airflow high-efficiency electric precipitator while the dust removal effect of the two-dimensional airflow high-efficiency electric precipitator is guaranteed, energy consumed by the electric precipitator is reduced to a great extent, electric energy and enterprise cost are saved, and the economic benefit is increased. And the intelligent degree of the two-dimensional airflow high-efficiency electric dust remover is greatly improved.

The invention relates to the technical field of braking devices, in particular to a braking particulate matter emission reduction device and method suitable for a new energy vehicle. The device comprises a dust collection cover covering a brake device, a particulate matter adsorption system connected with the dust collection cover, a controller, a fan and an electrostatic generation system, the dust collection cover is used for collecting brake particles and conveying air mixed with the brake particles to the particle adsorption system through a pipeline under the action of the fan; the controller controls the electrostatic generation system to generate an electric field and adjusts the intensity of the electric field; opening and closing of a fan are controlled, and air volume is adjusted; the particulate matter adsorption system adsorbs particulate matter under the action of an electric field, and after the electric field disappears, the particulate matter automatically falls into the dust collection box.

The invention relates to a filter insert (10) for a filter system (100) comprising an ionizer (102), with an electrically insulating filter material (14), at least one electrically conductive polarizing element (16a, 16b) to which an electrical voltage can be applied to polarize the filter material (14), and a current collector (20) which is designed to protect the filter material (14) from an overcurrent caused by a voltage breakdown and the resulting damage.

The present disclosure relates to an electrostatic charger and an electrostatic precipitator securing a wide space for charging suspended fine particles contained in a processing airflow. The electrostatic charger includes a discharge electrode formed of a plurality of fibrous conductors and provided to generate and diffuse ions by a discharge, a ground electrode maintained at a ground potential and provided to attract the ions generated and diffused by the discharge electrode to charge suspended fine particles contained in a processing airflow by the ions, where the discharge electrode is disposed between the ground electrodes in the processing airflow, and all or at least a part of the plurality of fibrous conductors of the discharge electrode are disposed on a downstream side of the processing airflow further than an end portion of the ground electrode on the most upstream side of the processing airflow.

The invention relates to the technical field of high-frequency power supply control, in particular to a high-frequency power supply driving control circuit and driving control method for an electric precipitator, and the method comprises the steps: collecting dust concentration data, current data, voltage data and flue gas temperature data of the electric precipitator in observation time periods at all moments; analyzing the dispersion degree of each parameter in the time window, performing anomaly detection on the data of each parameter in the time window, and obtaining the disorder index of each parameter according to the anomaly detection result; the confusion degree of the confusion indexes of various parameters at all moments in the observation time period of each moment is combined with multi-attribute decision analysis to obtain the comprehensive proximity of each moment, and the comprehensive working condition fitness of the electric dust remover at each moment is obtained; and controlling a high-frequency power supply of the electric dust remover by combining the disorder index of each parameter on the basis of a numerical relationship between the comprehensive working condition fitness and a preset threshold value. The invention aims to dynamically adjust the power supply output and ensure the efficient operation of the electric dust remover.

The invention discloses an electrostatic dust collector high-voltage power supply dynamic adjustment method based on fuzzy control, and the method comprises the steps: extracting the impedance change and dust concentration based on real-time operation parameters, judging the tripping risk through fuzzy reasoning, and adjusting the output voltage. And in combination with dust distribution characteristics, pulse parameters are optimized through a fuzzy control algorithm, and waveforms matched with particle motion are generated. Environment parameters are collected to construct a working condition model, and a control mode is switched after scene recognition. And predicting a load change trend, and calculating a millisecond-level response strategy. And fusing the dust removal efficiency and the energy consumption target, dynamically distributing weights, calculating a comprehensive control strategy, verifying a balance state, iteratively adjusting a weight coefficient, and realizing dynamic adjustment of the high-voltage power supply. According to the invention, the stability, the dust removal efficiency and the energy consumption balance of the high-voltage power supply are remarkably improved, and intelligent control of multi-objective optimization is realized.

The present invention aims at the problem that the power saving control of the precipitator in the prior art only considers the analysis of the electrical characteristics in the electric field of each electric field and controls them independently, but rarely considers the operating status of the entire system of the precipitator. A method and system for energy saving optimization of coordinated control of an electrostatic precipitator is proposed, including determining a number of electrostatic precipitator chambers according to the overall goal, and determining the smoke control sub-goal of each electrostatic precipitator chamber, setting the operation mode and related control parameters of each high-voltage power supply according to the flue gas conditions, and differentially allocating the rated output power and working mode of the high-voltage electric field in the same electrostatic precipitator chamber. Under the premise of ensuring that the smoke control sub-goal remains unchanged, the output power of each high-voltage electric field is automatically adjusted, and each high-voltage electric field can work in coordination with each other. The present invention performs systematic global deployment control on each high-voltage electric field in the electrostatic precipitator, and each high-voltage electric field can work in coordination with each other, and the dust removal energy consumption utilization rate is higher, thereby greatly improving the energy saving efficiency of the entire electrostatic precipitator.

The invention relates to the technical field of tunnel cleaning, discloses a tunnel wall surface self-cleaning system based on an electrostatic adsorption principle and a design method, and aims to solve the problems of low efficiency, high cost and large potential safety hazard of traditional tunnel cleaning. The system comprises a solar power supply system, an automatic control system and a dust removal system, wherein the automatic control system detects dust concentration by using a laser particulate matter sensor and dynamically adjusts dust removal voltage in combination with a fuzzy PID (Proportion Integration Differentiation) algorithm; according to the dust removal system, an arc-shaped conductive fiber dust collection plate is adopted to be matched with a tunnel curved surface structure, efficient dust removal is achieved through a vibrator and a dust collection box, and a humidity regulation and control function is integrated to inhibit reentrainment of dust. Organic integration of new energy power supply and intelligent dust removal is creatively achieved, the tunnel cleaning system has the advantages of being compact in structure, high in adaptability, capable of saving energy and environmentally friendly, the automation and intelligence level of tunnel cleaning work is remarkably improved, the operation cost is reduced, and an efficient, economical and sustainable solution is provided for tunnel environment governance.

A smart air ionizer is disclosed herein. The smart air ionizer includes a power circuit, a high voltage circuit, an electrode coupled to the high voltage circuit, the electrode configured to ionize air surrounding the electrode, and a controller circuit coupled to the power circuit and the high voltage circuit, the controller circuit including a controller configured to control a voltage output of the high voltage circuit to the electrode based on a feedback received from the high voltage circuit.

The utility model relates to a large bearing oil mist collecting device which comprises a high-voltage electric field oil mist purifier, an axial flow fan, two connecting pipelines and an oil scavenger pump, one connecting pipeline is communicated with an air inlet of a bearing oil basin, the axial flow fan and an air outlet of the high-voltage electric field oil mist purifier, and the other connecting pipeline is communicated with an air outlet of the high-voltage electric field oil mist purifier. The other one is communicated with an air outlet of the bearing oil basin and an air inlet of the high-voltage electric field oil mist purifier; the high-voltage electric field oil mist purifier is a closed box body, an electric field polar plate mechanism for ionization oil removal is arranged in the closed box body, and an oil discharge hole, an oil storage box and an oil return pump are arranged at the bottom of the electric field polar plate mechanism. The closed circulation mode and electrostatic adsorption after ionization are combined, oil mist is captured and collected, air with oil drops captured and collected and the oil drops captured and collected return to a generator bearing oil basin through the axial flow fan and the oil return pump, and the purposes of oil and gas separation and oil return are achieved in the closed circulation mode.

The embodiment of the invention provides a self-recovery method for the ion release capacity of a high-voltage electrostatic module, electronic equipment, a storage medium and a program product, and the method comprises the steps: outputting a self-recovery control signal corresponding to a target time threshold value under the condition that the cumulative operation time length of the high-voltage electrostatic module reaches the target time threshold value, the high-voltage electrostatic module is controlled to execute self-recovery operation; and when it is determined that the accumulated purification amount of the high-voltage electrostatic module reaches a target purification amount threshold value, outputting a self-recovery control signal corresponding to the target purification amount threshold value so as to control the high-voltage electrostatic module to execute the self-recovery operation. The embodiment of the invention provides a dual guarantee mechanism self-adaptive to different use scenes (light-load stable operation and heavy-load accelerated attenuation), establishes an active monitoring and recovery capability for performance attenuation of the high-voltage electrostatic module, and solves the problem that the purification efficiency is reduced due to the fact that the ion release capability is reduced after the module is used for a long time.

An electrostatic air filter device (1) and a method for operating the electrostatic air filter device (1) are proposed. The electrostatic air filter device (1) is designed to filter air flowing through it and comprises an ionizer (2) for ionizing air particles (3) in an electrostatic field generated by applying an electrical voltage supplied by a controllable electrical power source (21) to the ionizer (2). The electrostatic air filter device (1) further comprises an electrical control circuit (20) for controlling the controllable electrical power source (21). The electrical control circuit is configured to detect at least one current power parameter of the ionizer (2) to determine its current state and to adjust the electrical power source at least partially based on the detected power parameter.

A blower device (1000) of an air conditioning system for a vehicle, comprising: a blower box (100) including a duct part (110) with an inside air inlet (111) and an outside air inlet (112), an air-blowing part (120) connected to an inlet of an air-conditioning box, and a connecting part (130) for connecting the duct part (110) to the air-blowing part (120), wherein the connecting part (130) has an insertion part (131) from which a specific area is hollowed out; an inside and outside air conversion door (200) arranged in the duct part (110) of the blower box (100) for opening and closing the inside air inlet (111) and the outside air inlet (112); a blower (300) arranged in the air-blowing part (120) of the blower box (100) is arranged to forcibly blow air;an electric dust collector (400) located at the connecting part (130) of the blower box (100);and a cover (500) for opening and closing the insertion part (131) of the blower box (100), wherein the blower device (1000) of the air conditioning system for the vehicle has an electric charger unit (420) attached to the blower box (100) separately from the electric dust collector (400), and the electric dust collector (400) has a filter unit (410) for collecting dust charged with electricity by the electric charger unit (420) and a high-voltage supply unit (430) for applying high voltage to the electric charger unit (420) and the filter unit (410).

The application discloses a kind of spark flashover point generation position prediction method and system of pulse high voltage power supply, obtain spark flashover characteristic database from initial time to the total number of spark flashover stored during current time, determine the spark flashover number of each partition in total number of spark flashover, based on total number of spark flashover and the spark flashover number corresponding to each partition, obtain the current occurrence probability of spark flashover of each partition, determine the instantaneous impedance variation law of each partition when flue gas working condition parameter changes, based on the current occurrence probability corresponding to each partition spark flashover and instantaneous impedance variation law of spark flashover, using random optimization algorithm, obtain the predicted occurrence position and predicted occurrence probability of spark flashover point next time.The application realizes the predicted occurrence position and predicted occurrence probability of spark flashover point next time, to improve the intelligent control level of pulse high voltage power supply.

The invention relates to the technical field of electric precipitation, in particular to overload monitoring equipment and a monitoring method for electric precipitation equipment, and the method comprises the following steps: acquiring target production data; determining a target dust discharge amount according to the target production data; and determining the target current magnitude according to the target dust discharge amount. The method has the advantages that the neural network is used for conducting deep learning on online collected production data, a corresponding relation model between the dust amount and the power plant production data is established, the smoke dust emission amount is predicted based on the model, the average secondary current amount of the electric field is adjusted in real time on the basis, and the purposes of reducing consumption and reducing power consumption are achieved. According to the invention, the control aims of improving the reliability of the IGBT and prolonging the service life of the IGBT are fulfilled, the spark discharge phenomenon can be reduced or avoided as much as possible, equipment such as the IGBT and a trigger circuit board can be better protected, and unnecessary electric energy consumption can be effectively reduced at the same time.

The invention discloses an electric field parameter coordination control method and system of an electrostatic dust collector, and belongs to the technical field of electrostatic dust collection. The problems that an existing coordination control method depends on artificial experience, electric field parameters are inflexible to adjust, energy consumption is high, and dust removal efficiency is unstable are solved, historical electric field parameters and smoke turbidity are predicted and analyzed through the deep neural network, a prediction result is optimized in combination with a particle swarm optimization algorithm, and the method has the advantages of being high in practicability and the like. The electric field parameter ratio with the lowest energy consumption can be found on the premise that the dust removal efficiency is met, so that the electric field is always in the optimal operation state; meanwhile, by monitoring the electric field parameters in real time, the electric field parameters can be dynamically adjusted according to the change of the working condition parameters, so that the method adapts to complex working condition changes, the dust removal efficiency is further improved, the performance and operation stability of the electrostatic dust collector are effectively improved, and the method has wide application prospects.

The invention provides a pulverized coal concentration device based on a charge method and a control method of the pulverized coal concentration device, and belongs to the field of combustion of coal-fired boilers. The problems that a traditional inertia separation technology is low in separation efficiency and prone to abrasion in the low-load stable combustion process of the pulverized coal boiler are solved. Comprising a corona discharge device, a grounding device, a central discharge device, a concentrated pulverized coal pipeline and a light-phase pulverized coal pipeline, a guide plate is arranged at an inlet of the concentrated pulverized coal pipeline, one end of the light-phase pulverized coal pipeline is inserted into the concentrated pulverized coal pipeline, and the other end of the light-phase pulverized coal pipeline is located on the outer side of the concentrated pulverized coal pipeline; the corona discharge device is arranged on the outer side wall, corresponding to the insertion section of the light-phase pulverized coal pipeline, of the concentrated pulverized coal pipeline, the grounding device is of an annular structure and arranged on the outer side of the corona discharge device in a surrounding mode, and a wear-resistant lining is arranged on the inner wall of the concentrated pulverized coal pipeline. The device is mainly used for improving the pulverized coal concentration of the pulverized coal boiler during low-load operation.

The invention relates to a filter insert (10) for a filter unit comprising an electrical supply module, wherein the filter insert (10) can be inserted into an insert receiving area of ​​the filter unit in several insertion orientations, with an electrically insulating filter material (14), at least one electrically conductive polarizing element (16a, 16b) to which an electrical voltage can be applied to polarize the filter material (14), and a contact arrangement connected to the at least one polarizing element (16a, 16b) for electrically contacting the filter insert (10) with the electrical supply module.