CN116764815A - Electrostatic dust removal filter and electrode plate applied to same - Google Patents

Abstract

The present disclosure relates to an electrostatic precipitator filter and an electrode plate used in the electrostatic precipitator filter. Wherein, the electrostatic precipitator filter includes a plurality of positive electrode plates and a plurality of negative electrode plates, wherein the plurality of positive electrode plates and the plurality of negative electrode plates are discharged alternately at equal intervals, and the filter air channel is between the positive and negative electrode plates. The positive electrode plate is connected to the positive electrode of the high-voltage power supply, the negative electrode plate is connected to the negative electrode of the high-voltage power supply, and all or one of the positive electrode plate and the negative electrode plate is along the positive and negative electrodes of the power supply. A semiconductor plate with a specific resistivity range in a direction; the whole or upper and lower surfaces of the semiconductor material plate are made of semiconductor material. According to embodiments of the present disclosure, the electrostatic precipitator filter uses a semiconductor material electrode plate with a specific resistivity range, which can solve various defects brought to the electrostatic precipitator filter by various types of electrode plates in the prior art.

Description

Electrostatic precipitator filter and electrode plate used in electrostatic precipitator filter

Technical field

The present disclosure relates to the technical field of electrostatic precipitating, and in particular to an electrostatic precipitating filter and an electrode plate used in the electrostatic precipitating filter.

Background technique

Electrostatic precipitator filters have been widely used and developed because of their low wind resistance and can be cleaned and used repeatedly. Electrostatic precipitator filters are composed of high-voltage electrode plates and low-voltage electrode plates arranged at alternating intervals to form a strong electrostatic field, thereby adsorbing charged particles. collection function. The electrode plate is the core component of the electrostatic precipitator filter. Its material and structure determine the purification capacity, cost, life, by-products, reliability, safety, etc. of the electrostatic precipitator filter.

There are currently two representative electrode plate materials: 1. Electrode plates represented by metal conductive materials; 2. Electrode plates wrapped with conductive materials made of insulating materials. However, filters composed of these electrode plate structures have different shortcomings:

The electrostatic precipitator filters composed of conductive material electrode plates have the following well-known defects: 1. The inter-electrode voltage of the conductive material electrode plates cannot be increased too high. If it is increased, inter-electrode arc discharge will occur; at the same time, in order to avoid causing dust adsorption The potential for ignition caused by the decrease in the electrode spacing between the electrodes, and the inter-electrode voltage should be further reduced when designing, resulting in a low inter-electrode electric field, resulting in a low initial purification efficiency of the filter; 2. Electrode plates composed of metal conductive materials The electrostatic precipitator filter is heavy and inconvenient for construction and maintenance; 3. The metal conductive material electrode plate is subject to corrosion and aging after long-term use; 4. The conductive material electrode plate absorbs too much dust or absorbs large particles, and there is a hidden danger of sparking between the electrodes; 5. The current between the conductive material electrode plates is uncontrollable and the amount of ozone is large; 6. A local short circuit between the conductive material electrode plates will cause the entire filter to fail; 7. There is a risk of electric shock after the conductive material electrode plates are energized and the human body cannot be touched.

Although the electrostatic precipitator filter composed of electrode plates wrapped with insulating materials and conductive materials can effectively solve the above-mentioned defects such as sparking between electrodes, short circuit between electrodes, and ozone release, it still has other problems:

1. The dust holding capacity is low. The insulating properties of the insulating material cause the surface of the electrode plate to quickly accumulate charges, forming a reverse electric field, which greatly reduces the purification efficiency and renders the filter ineffective; 2. To avoid electricity creepage, a wrapping layer composed of wrapping materials is used. The conductive layer needs to be wider than the conductive material, and the effective area of the conductive layer is reduced. Especially for filters with narrow electrode plate thickness, the dust collection efficiency will be seriously lost, as shown in Figure 1.

Contents of the invention

The present disclosure provides an electrostatic precipitator filter and an electrode plate used in the electrostatic precipitator filter to solve various defects brought to the electrostatic precipitator filter by various types of electrode plates in the prior art.

According to a first aspect of the present disclosure, an electrostatic precipitator filter is provided, which is characterized in that it includes a plurality of positive electrode plates and a plurality of negative electrode plates, wherein the plurality of positive electrode plates and the plurality of negative electrode plates are The electrode plates are discharged alternately at intervals, the positive electrode plate is connected to the positive electrode of the high-voltage power supply, the negative electrode plate is connected to the negative electrode of the high-voltage power supply, and all or one of the positive electrode plates and the negative electrode plates are along the positive and negative electrodes of the power supply. Semiconductor material plates with directional resistivity in the order of [10^(2)Ω·m, 10^(8)Ω·m].

Optionally, all or one of the positive electrode plate and the negative electrode plate has a resistivity in the order of [10^(3)Ω·m, 10^(8)Ω·m along the positive and negative electrode directions of the power supply. ] between semiconductor material plates.

Optionally, all or one of the positive electrode plate and the negative electrode plate has a resistivity in the order of [10^(4)Ω·m, 10^(8)Ω·m along the positive and negative electrode directions of the power supply. ] between semiconductor material plates.

Optionally, in the case where the resistivity of the semiconductor material plate is between [10^(4)Ω·m, 10^(8)Ω·m], One or more conductive strips made of conductive material are respectively provided on the surface, and the surfaces of the conductive strips are insulated.

Optionally, the semiconductor material plate has a layered structure, and the layered structure includes three layers, the middle layer is a support layer made of insulating material, and the upper and lower layers of the middle layer are conductive layers made of semiconductor material.

Optionally, the edges of the semiconductor material electrode plate in the width direction are wrapped with insulating material.

Optionally, the extension length of the support layer made of insulating material in the width direction is greater than the extension length of the conductive layer made of semiconductor material in the width direction.

According to a second aspect of the present disclosure, there is provided an electrode plate used in an electrostatic precipitator filter, characterized in that the electrode plate becomes a positive electrode plate when connected to the positive electrode of the high-voltage power supply, and becomes a negative electrode when connected to the negative electrode of the high-voltage power supply. plate, and the electrode plate is composed of a semiconductor material with a resistivity of the order of [10^(2)Ω·m, 10^(8)Ω·m].

Optionally, the electrode plate is made of a semiconductor material with a resistivity in the range of [10^(3)Ω·m, 10^(8)Ω·m].

Optionally, the electrode plate is made of a semiconductor material with a resistivity in the range of [10^(4)Ω·m, 10^(8)Ω·m].

Optionally, when the electrode plate is a semiconductor material with a resistivity of between [10^(4)Ω·m, 10^(8)Ω·m], set on the surface of the electrode plate There are one or more conductive strips made of conductive material, and the surface of the conductive strips is insulated.

Optionally, the electrode plate has a layered structure, and the layered structure includes three layers, the middle layer is a support layer made of insulating material, and the upper and lower layers of the middle layer are conductive layers made of semiconductor material.

Optionally, the edges of the electrode plate in the width direction are wrapped with insulating materials.

Optionally, the extension length of the support layer made of insulating material in the width direction is greater than the extension length of the conductive layer made of semiconductor material in the width direction.

Therefore, the electrode plate in the electrostatic precipitator filter is made of semiconductor material, so that the electrode plate has a certain conductive ability and can effectively transmit high voltage to form a strong electric field; at the same time, because the surface of the electrode plate is made of semiconductor material with specific resistivity, it can suppress Air ionization eliminates the arc discharge phenomenon between the positive and negative electrodes, thus greatly increasing the voltage that can be applied between the electrodes. Electrode plates made of this material have two advantages, one is improved performance, and the other is improved safety. In terms of performance, this patented solution can more than double the voltage applied per unit distance between electrodes, thereby greatly improving the purification efficiency of the filter. In terms of safety, during use, even if the positive and negative plates are directly short-circuited, arcing and violent discharge will not occur. When powered on, electrode plates made of semiconductor materials can also meet the national mandatory safety standard GB4706.1-2005 "Safety of Household and Similar Electrical Appliances Part 1: General Requirements" and can be touched directly by human hands, which is absolutely safe. In addition, because semiconductor materials have good charge dissipation capabilities and will not form a counter-electric field on the surface of the electrode plate, electrostatic precipitator filters made of semiconductor materials have good dust-holding properties and can continue to work for a long time without frequent cleaning and maintenance. .

Description of drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing the exemplary embodiments of the present disclosure in more detail with reference to the accompanying drawings, in which the same reference numerals generally refer to the exemplary embodiments of the present disclosure. Same parts.

Figure 1 illustrates a schematic cross-sectional view of a type of electrode plate structure in the prior art;

Figure 2 shows a schematic structural diagram of an electrostatic precipitator filter of the present disclosure;

Figure 3-a shows a schematic top view of a structure of any electrode plate in the electrostatic precipitator filter of the present disclosure;

Figure 3-b shows a schematic top view of another structure of any electrode plate in the electrostatic precipitator filter of the present disclosure;

Figure 3-c shows a schematic top view of another structure of any electrode plate in the electrostatic precipitator filter of the present disclosure;

Figure 4 illustrates a schematic cross-sectional view of an electrode plate layered structure in the electrostatic precipitator filter of the present disclosure;

Figure 5 illustrates a top view of an electrode plate edge insulation treatment structure in the electrostatic precipitator filter of the present disclosure;

Figure 6-a illustrates a top view of another layered structure of electrode plates in the electrostatic precipitator filter of the present disclosure;

Figure 6-b illustrates a schematic cross-sectional view of another layered structure of electrode plates in the electrostatic precipitator filter of the present disclosure.

Detailed ways

Alternative embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although alternative embodiments of the disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The inventor of the present disclosure discovered during research that in order to solve various defects brought to electrostatic precipitator filters by various types of electrode plates in the prior art, the basic material properties of the electrode plates in the electrostatic precipitator filter and the electrode plate The composition structure is the key. If the electrode plate is made of semiconductor material and has a specific resistivity, the filter air channel is formed between the electrode plate made of semiconductor material and the air contact surface. The electrode plate of semiconductor material not only has a certain conductive ability, but also can effectively It transmits high voltage to form a strong electric field; at the same time, because the surface of the electrode plate is made of semiconductor materials with specific resistivity, it can suppress air ionization and eliminate arc discharge between the positive and negative electrodes, thus greatly increasing the voltage that can be applied between the electrodes. Electrode plates made of this material have two advantages, one is improved performance, and the other is improved safety. In terms of performance, this patented solution can more than double the voltage applied per unit distance between electrodes, thereby greatly improving the purification efficiency of the filter. In terms of safety, during use, even if the positive and negative plates are directly short-circuited, arcing and violent discharge will not occur. When powered on, electrode plates made of semiconductor materials can also meet the national mandatory safety standard GB4706.1-2005 "Safety of Household and Similar Electrical Appliances Part 1: General Requirements" and can be touched directly by human hands, which is absolutely safe. In addition, because semiconductor materials have good charge dissipation capabilities and will not form a counter-electric field on the surface of the electrode plate, electrostatic precipitator filters made of semiconductor materials have good dust-holding properties and can continue to work for a long time without frequent cleaning and maintenance. .

Based on the above design ideas, the present disclosure provides an electrostatic precipitator filter. As shown in Figure 2, the electrostatic precipitator filter 20 includes a plurality of positive electrode plates 21 and a plurality of negative electrode plates 22, wherein the plurality of positive electrode plates 21 and multiple negative electrode plates 22 are discharged alternately and spaced apart, all positive electrode plates 21 are connected to the positive electrode of the high-voltage power supply and become positive electrode plates, all negative electrode plates 22 are connected to the negative electrode of the high-voltage power supply and become negative electrode plates, and the positive electrode plate 21 and the negative electrode All or one of the plates 22 is a semiconductor material plate with a resistivity in the order of [10^(2)Ω·m, 10^(8)Ω·m].

However, in the selection of semi-conductive materials, it is necessary to find a reasonable resistivity range, which must be conductive and have sufficient insulation at the same time. The inventor of the present disclosure found the matching specific resistance value through experiments, and based on the polarity Plate size calculations select specific resistivity materials.

First, a calibration experiment for resistivity (that is, volume resistivity, hereinafter simply referred to as resistivity) is performed.

In the calibration laboratory, a set of electrode plates composed of materials with different resistivities is selected to test their conductivity. At the same time, the actual resistance value of the material is measured, and the resistivity of the material is calculated. The test is to measure the resistance value in the length direction, that is, the resistance value along the positive and negative pole directions of the power supply, as shown by the arrows in Figure 2, and calculate the resistivity in the positive and negative pole directions of the power supply. Among them, a total of six materials were tested, with different resistivities. The size of the electrode plates was the same, with a length of 180mm, a width of 30mm, and a thickness of 0.05mm.

The calibration results are shown in the following table:

By applying a voltage of 4000V to the electrode plates of the six groups of materials and measuring the current, the resistance values of the six groups of materials and the corresponding material resistivities were calculated. The resistivities of the six groups of materials ranged from conductors, more than one hundred to more than two million Ω. ·M. According to the number, materials with different resistivities are defined as material No. 1 to material No. 6. Among them, electrode plate No. 1 is a conductor material, and electrode plate No. 6 is a material with a resistivity of 2083333Ω·M.

Next, perform the inter-electrode withstand voltage test.

Use two electrode plates of the same material to form a pair of positive electrode plates and negative electrode plates, and simulate the working scene of the electrostatic precipitator filter to examine the voltage that the electrodes can withstand. Among them, the distance between the positive electrode plate and the negative electrode plate is 1.5mm, apply different voltages between the positive electrode plate and the negative electrode plate, measure the operating current, and observe whether there is air ionization (hissing sound). The test results are shown in the table below. Among them, the data with bold fonts for No. 1 material correspond to the phenomenon of arcing and ignition, and the data with bold fonts for the other materials correspond to the phenomenon of hearing the sound of air ionization.

It can be seen from the data that when the No. 1 material is a conductor with low resistivity, the maximum voltage that the electrodes can withstand is 2.7KV (1.8KV/mm). When the voltage increases to 3KV, an obvious arc discharge will occur. Phenomenon. Because air breakdown discharge will increase the current and release heat locally, it will bring safety risks and form noise, ozone and other pollution, which is generally not allowed when the filter is working. Therefore, the voltage that can be applied to a filter made of generally conductive material electrode plates cannot exceed 1.8KV/mm, and the usual design requires further margin. Material No. 2 has a resistivity of more than 100 Ω·M, and the maximum voltage that the electrodes can withstand has increased to 3.5KV (2.3KV/mm). When the voltage increases to 4KV, air ionization will occur, but there will be no intense pulling. arc discharge. Further increasing the material resistivity, we can see that the maximum voltage that No. 3 material can withstand between the electrodes is 4.5KV (3.0KV/mm), the maximum voltage that No. 4 material can withstand between the electrodes is 5KV (3.3KV/mm), and the No. 5 material can withstand the maximum voltage between the electrodes is 5KV (3.3KV/mm). The maximum voltage that the electrodes of the material can withstand is 6KV (4KV/mm), and the maximum voltage that the No. 6 material can withstand between the electrodes is 7KV (4.7KV/mm).

Under the same applied voltage, as the material resistivity increases, the interelectrode current is lower. The ionization phenomenon of the inter-electrode air caused by the increase in voltage also becomes more and more gentle as the resistivity of the material increases. There is no longer a fierce discharge phenomenon at a single point, but a uniform corona discharge is formed between the planes. This The noise generated by the discharge is greatly reduced, the heat release becomes even, and there are no safety hazards anymore.

Finally, the inter-electrode voltage and purification efficiency experiments after dust containment were conducted.

The first five materials mentioned above are used to make electrostatic dust removal filters. The production method is to stack multiple independent filter units (one filter unit includes a positive electrode plate and a negative electrode plate), and connect the positive electrode plate of each stacked filter unit to a high-voltage power supply. (+HV) connection, the negative electrode plate is connected to ground (GND), thus forming an electrostatic precipitator filter. In this way, an electric field is formed in each air channel in the electrostatic precipitator filter in a direction from the positive electrode plate to the negative electrode plate. The charged particles in the air flow passing through each air channel are adsorbed to the positive electrode under the action of the electric field force. plate or negative electrode plate to achieve the effect of dust removal and purification.

The size of the electrostatic precipitator filter is 290*220mm and the thickness is 40mm. The length of each electrode plate is 200mm, the electrode spacing is 1.5mm, and the number of electrode plates is 116.

In order to ensure that the electrostatic precipitator filter has a certain dust holding capacity, it is necessary to ensure that the filter operates normally even when a large amount of dust accumulates between the poles. All filters in this experiment were tested at a voltage that was a certain amount lower than the maximum withstand voltage in the inter-electrode withstand voltage experiment. For example, for material No. 5, the applied interelectrode voltage of 4.5KV was too large, so 4.0KV was applied instead. The results of observing the working current, inter-electrode voltage drop and purification efficiency under the condition of 2m/s wind speed are shown in the following table:

It can be seen that during the initial operation, the purification efficiency is also significantly different due to the different applied inter-electrode voltages. The purification efficiency of all other materials is significantly improved compared to material No. 1. However, due to the high resistivity of material No. 5, the voltage drop between the electrodes becomes obvious, and the voltage between the electrodes cannot be increased.

By letting the filter perform dust removal on 1,000 cigarettes, the results of observing the operating current, inter-electrode voltage drop and purification efficiency are as shown in the table below:

It can be seen that after the filter passes through a large dust holding capacity, the leakage current between the electrodes increases. Excessive resistance value will cause additional voltage loss between the electrodes, resulting in a reduction in purification efficiency.

Therefore, the above experiments tested the working characteristics of semiconductor material electrode plates of different materials with resistivities ranging from one hundred Ω·M to two million Ω·M in electrostatic precipitator filters. Among them, the increase in the inter-electrode withstand voltage is directly determined by the resistivity. The higher the resistivity of the semiconductor material, the higher the inter-electrode withstand voltage. The change in inter-electrode voltage drop caused under a certain operating current condition is determined by the resistance value of the electrode plate, and the resistance value is related to the resistivity of the material and the size of the material. The semiconducting material used in the above experiments is very thin, only 0.05mm. In practical applications, the conductive material can be made thicker, up to 0.5mm, which will reduce the end-to-end resistance of materials with the same resistivity by 10 times. In addition, in practical applications, the end-to-end resistance value can be effectively reduced through the combination of different resistivity materials, allowing higher resistivity materials to be applied. However, insulating materials whose resistivity is on the order of greater than 10^8Ω·m cannot be applied to the disclosed solution because they do not have conductive properties. Therefore, the electrode plate in the present disclosure uses a semiconductor material with a resistivity in the order of [10^(2)Ω·m, 10^(8)Ω·m], and uses a semiconductor material with a resistivity in this range as the electrode plates, which can effectively reduce the intensity of discharge and ignition between the plates, increase the withstand voltage between the plates, and improve the filter performance. At the same time, the filter has very good safety features and dust-holding characteristics.

In order to highlight the high resistivity characteristics of semiconductors, the electrode plate in this disclosure can use semiconductor materials with a resistivity in the order of [10^(3)Ω·m, 10^(8)Ω·m]. Furthermore, , it is also possible to use semiconductor materials whose resistivity is on the order of [10^(4)Ω·m, 10^(8)Ω·m].

Furthermore, the inventor of the present disclosure also discovered during research that material No. 6 has very weak conductive properties due to its excessive end-to-end resistance value. The inter-electrode voltage of an electrostatic precipitator filter based on material No. 6 after containing dust is and purification efficiency are not ideal. Therefore, in order to improve the inter-electrode voltage and purification efficiency of the electrostatic precipitator filter made of semiconductor materials with large resistance values after dust holding, the present disclosure also provides an improved structure of the electrode plate, as shown in Figure 3- As shown in a and 3-b, for convenience of description, Figure 3-a only illustrates that in addition to one electrode plate in the electrostatic precipitator filter, one or more conductive strips 23 made of conductive materials are provided on the surface of the electrode plate. (Figure 3-a only shows the case of one conductive strip 23, and Figure 3-b shows the case of two conductive strips 23). In addition, for the case where there are multiple conductive strips 23, the conductive strip located at the edge can maintain a certain gap from the edge of the electrode plate, as shown in Figure 3-a and Figure 3-b, or it can also be separated from the edge of the electrode plate. There is no gap at the edge, as shown in Figure 3-c.

It should be noted that the electrode plate with an improved structure may be the positive electrode plate 21 or the negative electrode plate 22 in the electrostatic precipitator filter, or it may be the positive electrode plate 21 and the negative electrode plate 22 at the same time.

In addition, in addition to directly facing each other, the positions between the positive electrode plate 21 and the negative electrode plate 22 may also be kept offset from each other and not directly face to face.

Of course, as shown in Figure 2, an electrostatic precipitator filter contains multiple positive electrode plates 21 and multiple negative electrode plates 22, and they are discharged alternately from each other. For other positive electrode plates in the electrostatic precipitator filter and negative electrode plate, which can be set up as shown in Figure 3-a, 3-b or 3-c.

Through the above arrangement, the insulating properties of the high resistivity material are retained, high voltage can be applied between the electrodes, and the end-to-end resistance value is greatly reduced. And after actual experimental testing, when the conductive strip is not added, the resistance value between A and B on the electrode plate reaches 200GΩ. After adding the conductive strip, the resistance value between AB will be 0. At this time, the resistance value between AC on the electrode plate is the highest. , but also reduced to 6GΩ.

We made the above-mentioned improved electrode plate into an electrostatic precipitator filter. The size of the filter is still 290*220mm and the thickness is 40mm. The electrode plate length is 200mm, the electrode spacing is 1.5mm, and the number of electrode plates is 116. After testing, the experimental data is shown in the following table:

It can be seen that the electrostatic precipitator filter made by the above improved electrode plate can withstand higher voltage between the electrodes. Although the voltage drop is not low, the actual voltage applied between the electrodes still increases significantly after deducting the voltage drop. Thus, the performance is improved, and the working current of the filter is also very stable.

Among them, as an optional implementation method, when the positive electrode plate and the negative electrode plate use semiconductor materials with a resistivity of the order of [10^(4)Ω·m, 10^(8)Ω·m], their terminals The resistance value to the end is too large. Through the above structural improvement, the inter-electrode voltage and purification efficiency after the filter contains dust are greatly improved.

When selecting electrode plate materials, the strength of the material must also be taken into consideration. Since there is electrostatic attraction between the electrode plates during operation, it is easy to cause the electrode plates to deform and be adsorbed together. Therefore, the strength of the electrode plate materials is very high. Therefore, in order to increase the strength of the electrode plate, in one embodiment of the present disclosure, the electrode plate can be designed as a layered structure. The layered structure can be divided into three layers. The thicker part in the middle is used to support the strength, and the two sides are used to support the strength of the electrode plate. The thinner portion provides conductive properties.

During specific implementation, the positive electrode plate 21, the negative electrode plate 22, or both the positive electrode plate 21 and the negative electrode plate 22 can be arranged in a layered structure, as shown in Figure 4, so that the positive electrode plate 21 is arranged in a layered structure. For example, the layered structure includes three layers: the middle layer 41 is a support layer and is made of insulating material; the upper layer 42 and the lower layer 43 of the middle layer 41 are conductive layers, both of which are made of semiconductor materials. Wherein, for the support layer, the insulating material may be a single insulating material or a composite insulating material, for example, the insulating material wraps the conductive material. The embodiments of the present disclosure do not limit the composition of the insulating material and the semiconductor material.

Since the cost of specific resistivity materials is much higher than that of insulating materials, the conductive layer can be made as thin as possible to reduce costs. According to mature technology, the thickness of the conductive layer on one side can be as low as 0.05mm, and the total thickness of the conductive layer on both sides is 0.1mm. Usually the total thickness of an electrode plate is about 0.5-1mm. Therefore, the thickness of the conductive layer can be controlled to only account for 10-20% of the total thickness of the entire electrode plate. Obviously, this multi-layer composite structure can not only reduce the cost of the electrode plate, but also take into account the mechanical and electrical properties.

In addition, the inventor of the present disclosure also found that there will be current leakage problems between electrode plates, mainly concentrated at the edges of the electrode plates. If some protective treatment is done on the edges of the electrode plates, the current leakage problem between the electrode plates can be effectively reduced. Because it can be known from the previous inter-electrode withstand voltage experiment that semiconductor materials with a certain resistivity will form a voltage drop when passing current. Especially after working for a period of time, the inter-electrode current increases, and the inter-electrode voltage drop will also increase. affect its purification efficiency. If there is a way to improve the current leakage between the electrodes, the dust holding characteristics of the filter can be further enhanced.

Therefore, in one embodiment of the present disclosure, in order to improve the inter-electrode current leakage problem, the edges of the electrode plates in the width direction are wrapped with insulating materials. For example, the edges on both sides of the positive electrode plate (of course, it can also be a negative electrode plate, or both positive and negative electrode plates) are wrapped with insulating materials.

Moreover, in order to test the improvement effect of the above problems, a set of test experiments were carried out. Among them, No. 4 material was selected to make the electrode plate. The length of the electrode plate was 180mm and the thickness was 0.05mm. Two electrode plates with different widths were produced. The widths are 30mm and 15mm respectively. In addition, the electrode plate with a width of 30mm is insulated with 7.5mm on both sides of the edge, leaving only a 15mm width of exposed semiconductor material, as shown in Figure 5.

The above three different types of electrode plates are formed into an electrostatic precipitator filter unit with a spacing of 1.5 mm. Each electrostatic precipitator filter unit includes two electrode plates of the same type. And simulate the working scene of the electrostatic precipitator filter to examine the voltage that the electrode plates can withstand. The experimental data is shown in the following table:

Among them, when it is below 3.5KV, just reducing the facing area between the positive and negative electrodes cannot effectively reduce the inter-electrode current. At this time, the interelectrode discharge is mainly caused by the corona discharge at the edge of the electrode plate. When the voltage increases to 4.0KV and 4.5KV, the current rises significantly, but the current of the large-area electrode plate rises faster, and it can be clearly seen that the current of the small-sized electrode plate becomes relatively low. At this time, the air is gradually ionizing, and the poor conductor gradually begins to conduct electricity. At this time, the current increase caused by the large area of the electrode plate will be greater.

After the insulating material is processed on the edge of the 30mm-width electrode plate, it can be seen that the operating current is significantly reduced. This is because the edge of the semiconductor material is relatively smooth at this time and is not easy to stimulate corona discharge. When the voltage gradually increases, because the air begins to ionize, the operating current also gradually increases, but because there is no current generated by the edge corona, the overall operating current is still much lower, reduced by more than 70%.

It can be seen from the above experimental data that the operating current can be effectively reduced by insulating the edges of the electrode plates. As mentioned in the previous analysis, since the selected semiconductor material itself will form a higher end-to-end resistance, the greater the operating current, the greater the voltage loss between the electrodes. The edge insulation treatment can effectively reduce the operating current, so the performance of the electrostatic filter delivered in this way, especially under high dust holding conditions, will be improved.

For the electrode plate with a layered structure as shown in Figure 4, in order to solve the problem of inter-electrode current leakage, as shown in Figures 6-a and 6-b, the extension length of the support layer made of insulating material in the width direction needs to be greater than that of the semiconductor material. The conductive layer formed extends in the width direction, thereby achieving the property of insulating the edge position of the entire electrode plate.

The electrostatic precipitator filter according to the present disclosure has been described in detail above with reference to the accompanying drawings. In addition to the electrostatic precipitator filter, embodiments of the present disclosure also include an electrode plate used in the electrostatic precipitator filter. The electrode plate becomes a positive electrode plate when connected to the positive electrode of the high-voltage power supply, and becomes a negative electrode when connected to the negative electrode of the high-voltage power supply. plate, and the electrode plate is made of semiconductor material.

Moreover, after experimental testing, the electrode plates in this disclosure use semiconductor materials with a resistivity between [10^(2)Ω·m, 10^(8)Ω·m], which can effectively reduce the discharge between the electrode plates. The severity of the fire increases the inter-electrode withstand voltage and improves the filter performance. At the same time, the filter has very good safety features and dust-holding characteristics.

In order to highlight the high resistivity characteristics of semiconductors, the electrode plate in this disclosure can use semiconductor materials with a resistivity in the order of [10^(3)Ω·m, 10^(8)Ω·m]. Furthermore, , it is also possible to use semiconductor materials whose resistivity is on the order of [10^(4)Ω·m, 10^(8)Ω·m].

In addition, as an optional implementation, when the electrode plate uses a semiconductor material with a resistivity of the order of [10^(4)Ω·m, 10^(8)Ω·m], its end-to-end resistance If the value is too large, the conductive properties are very weak. The inter-electrode voltage and purification efficiency of the positive and negative electrode plates in the manufactured electrostatic precipitator filter after dust collection are not ideal. One or more electrode plates can be set on the surface. A conductive strip made of conductive material, and the surface of the conductive strip is insulated. The electrostatic precipitator filter made of this improved electrode plate can withstand higher voltage between the electrodes. Although the voltage drop is not low, the actual voltage applied between the electrodes increases significantly after deducting the voltage drop, thus obtaining The performance is improved, and the working current of the filter is also very stable. There may or may not be a gap between the conductive strips and the edges of the electrode plates.

In order to enhance the support of the electrode plate, as another optional embodiment, the electrode plate can adopt a layered structure. The layered structure can include three layers. The middle layer is a support layer made of insulating material. The upper and lower layers of the middle layer are both A conductive layer made of semiconductor material. At the same time, in order to save costs, the thickness of the upper and lower conductive layers only accounts for 10%-20% of the total thickness of the entire electrode plate. Among them, the thickness of a single conductive layer can be 0.05mm, and the total thickness of the two conductive layers is 0.1mm.

In addition, in order to improve the current leakage problem between the electrode plates, in an optional embodiment, the edges of the electrode plates in the width direction are wrapped with insulating materials.

For an electrode plate with a layered structure, the extension length of the support layer made of insulating material in the width direction is greater than the extension length of the conductive layer made of semiconductor material in the width direction.

In the embodiment of the present disclosure, the electrode plate in the electrostatic precipitator filter is made of semiconductor material, so that the electrode plate has a certain conductivity and can effectively transmit high voltage to form a strong electric field; at the same time, because the surface of the electrode plate is made of semiconductor with specific resistivity The material can suppress air ionization and prevent arc discharge between the positive and negative electrodes, thus greatly increasing the voltage that can be applied between the electrodes. Electrode plates made of this material have two advantages, one is improved performance, and the other is improved safety. In terms of performance, this patented solution can more than double the voltage applied per unit distance between electrodes, thereby greatly improving the purification efficiency of the filter. In terms of safety, during use, even if the positive and negative plates are directly short-circuited, arcing and violent discharge will not occur. In the energized working state, the electrode plate using semiconductor material makes the filter operating current far less than 2mA, and can also meet the national mandatory safety standard GB4706.1-2005 "Safety of Household and Similar Electrical Appliances Part 1: General Requirements" 8 According to the safety requirements specified in Chapter "Protection against touching live parts" (ie, the DC current between the safety part and the power supply should not exceed 2mA), it can be touched directly and is absolutely safe. In addition, because semiconductor materials have good charge dissipation capabilities and will not form a counter-electric field on the surface of the electrode plate, electrostatic precipitator filters made of semiconductor materials have good dust-holding properties and can continue to work for a long time without frequent cleaning and maintenance. .

The embodiments of the present disclosure have been described above. The above description is illustrative, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (14)

1. An electrostatic precipitator filter, characterized in that it includes a plurality of positive electrode plates and a plurality of negative electrode plates, wherein the plurality of positive electrode plates and the plurality of negative electrode plates are discharged alternately at intervals, and the The positive electrode plate is connected to the positive electrode of the high-voltage power supply, the negative electrode plate is connected to the negative electrode of the high-voltage power supply, and all or one of the positive electrode plate and the negative electrode plate has a resistivity in the direction of the positive and negative electrodes of the power supply with a magnitude of [10^ (2)Ω·m, 10^(8)Ω·m] semiconductor material plate. 2. The electrostatic precipitator filter according to claim 1, wherein all or one of the positive electrode plate and the negative electrode plate has a resistivity in the order of [10^( 3) Semiconductor material plates between Ω·m, 10^(8)Ω·m]. 3. The electrostatic precipitator filter according to claim 1, wherein all or one of the positive electrode plate and the negative electrode plate has a resistivity in the order of [10^( 4) Semiconductor material plates between Ω·m, 10^(8)Ω·m]. 4. The electrostatic precipitator filter according to claim 1, characterized in that the resistivity of the semiconductor material plate is in the order of [10^(4)Ω·m, 10^(8)Ω·m] In the case between, one or more conductive strips made of conductive material are respectively provided on the surface of the semiconductor material plate, and the surface of the conductive strips is subjected to insulation treatment. 5. The electrostatic precipitator filter according to claim 1 or 4, characterized in that the semiconductor material plate has a layered structure, the layered structure includes three layers, and the middle layer is a support layer made of insulating material. Both the upper layer and the lower layer of the intermediate layer are conductive layers composed of semiconductor materials. 6. The electrostatic precipitator filter according to any one of claims 1 to 5, characterized in that the edges of the semiconductor material plate in the width direction are wrapped with insulating materials. 7. The electrostatic precipitator filter according to claim 5, wherein the extension length of the support layer made of insulating material in the width direction is greater than the extension length of the conductive layer made of semiconductor material in the width direction. 8. An electrode plate used in an electrostatic precipitator filter, characterized in that the electrode plate becomes a positive electrode plate when connected to the positive electrode of the high-voltage power supply, and becomes a negative electrode plate when connected to the negative electrode of the high-voltage power supply, and the electrode plate It is composed of semiconductor materials with a resistivity of the order of [10^(2)Ω·m, 10^(8)Ω·m]. 9. The electrode plate according to claim 8, characterized in that the electrode plate is made of a semiconductor material with a resistivity of the order of [10^(3)Ω·m, 10^(8)Ω·m] constitute. 10. The electrode plate according to claim 8, characterized in that the electrode plate is made of a semiconductor material with a resistivity of the order of [10^(4)Ω·m, 10^(8)Ω·m] constitute. 11. The electrode plate used in an electrostatic precipitator filter according to claim 8, characterized in that the resistivity of the electrode plate is in the order of [10^(4)Ω·m, 10^(8)Ω· m], one or more conductive strips made of conductive material are provided on the surface of the electrode plate, and the surface of the conductive strips is subjected to insulation treatment. 12. The electrode plate used in an electrostatic precipitator filter according to claim 8 or 11, characterized in that the electrode plate has a layered structure, the layered structure includes at least three layers, and the middle layer is an insulating material. The support layer, the upper layer and the lower layer of the intermediate layer are both conductive layers composed of semiconductor materials. 13. The electrode plate used in an electrostatic precipitator filter according to any one of claims 8-12, characterized in that the edges of the electrode plate in the width direction are wrapped with insulating materials. 14. The electrode plate used in an electrostatic precipitator filter according to claim 12, characterized in that the extension length of the support layer made of insulating material in the width direction is greater than the width direction of the conductive layer made of semiconductor material. extension length.