CN1745902A - A dipole corona electrostatic precipitator - Google Patents
A dipole corona electrostatic precipitator Download PDFInfo
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- CN1745902A CN1745902A CNA2005100196662A CN200510019666A CN1745902A CN 1745902 A CN1745902 A CN 1745902A CN A2005100196662 A CNA2005100196662 A CN A2005100196662A CN 200510019666 A CN200510019666 A CN 200510019666A CN 1745902 A CN1745902 A CN 1745902A
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- 239000012717 electrostatic precipitator Substances 0.000 title claims description 11
- 239000000428 dust Substances 0.000 claims abstract description 78
- 230000005684 electric field Effects 0.000 abstract description 9
- 238000010410 dusting Methods 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
Description
一、技术领域1. Technical field
本发明属于一种静电除尘装置，尤其是涉及一种偶极电晕静电除尘装置。The invention belongs to an electrostatic dust removal device, in particular to a dipole corona electrostatic dust removal device.
二、背景技术2. Background technology
目前，从含尘烟气中分离和捕集粉尘主要是采用各种不同形式的除尘装置，其中线一板式静电除尘器的应用最为广泛。其基本原理是利用电晕极放电，使烟气中的粉尘荷电，荷电粉尘在电场力的作用下向极性相反的收尘电极运动并收集下来，从而达到将粉尘从烟气中分离的目的。静电除尘器与其它类型的除尘器相比，具有阻力小、耗能少、收集效率高等优点。但它也存在一些不足之处，主要是：At present, various types of dust removal devices are mainly used to separate and capture dust from dusty flue gas, among which the line-plate electrostatic precipitator is the most widely used. The basic principle is to use corona electrode discharge to charge the dust in the flue gas. Under the action of the electric field force, the charged dust moves to the dust collecting electrode with opposite polarity and collects it, so as to separate the dust from the flue gas. the goal of. Compared with other types of dust collectors, electrostatic precipitators have the advantages of small resistance, low energy consumption, and high collection efficiency. But it also has some shortcomings, mainly:
1、其对粉尘比电阻的适应范围较窄，一般为104Ω·cm～1011Ω·cm，对于比电阻大于1011Ω·cm的高比电阻粉尘易产生反电晕现象，而对于比电阻小于104Ω·cm的低比电阻粉尘易产生二次扬尘(张殿印，王纯主编.除尘器手册.北京：化学工业出版社，2005)；1. Its adaptability to dust specific resistance is narrow, generally 10 4 Ω·cm～10 11 Ω·cm, for dust with high specific resistance greater than 10 11 Ω·cm, it is easy to produce back corona phenomenon, while for Dust with low specific resistance less than 10 4 Ω·cm is easy to generate secondary dust (Edited by Zhang Dianyin and Wang Chun. Dust Collector Handbook. Beijing: Chemical Industry Press, 2005);
2、对于超细粉尘，其收集效率不高(向晓东.电凝聚除尘理论与应用技术研究.东北大学，2003)；2. For ultrafine dust, its collection efficiency is not high (Xiang Xiaodong. Electrocoagulation dust removal theory and application technology research. Northeastern University, 2003);
3、由于其极配形式为线一板式，故收尘场强分布不均匀，平均场强较低，这不仅不利于提高粉尘的驱进速度，而且也不利于粉尘充分荷电(向晓东.现代除尘理论与技术.北京：冶金工业出版社，2002)；3. Since the pole matching form is a line-plate type, the distribution of the dust collection field strength is uneven and the average field strength is low, which is not conducive to increasing the driving speed of the dust, but also not conducive to the full charging of the dust (Xiang Xiaodong .Modern Dust Removal Theory and Technology. Beijing: Metallurgical Industry Press, 2002);
4、传统的静电除尘器难以达到日益严格的环保标准(赵毅等.袋式除尘器在燃煤电厂的应用与前景.华北电力大学学报，2003，30(6)：90-93)。4. Traditional electrostatic precipitators are difficult to meet increasingly stringent environmental protection standards (Zhao Yi et al. Application and prospect of bag filter in coal-fired power plants. Journal of North China Electric Power University, 2003, 30(6): 90-93).
三、发明内容3. Contents of the invention
本发明的任务是提供一种收集效率高、结构简单、运行可靠、对粉尘比电阻适应范围大的偶极电晕静电除尘装置。The task of the present invention is to provide a dipole corona electrostatic precipitator with high collection efficiency, simple structure, reliable operation and wide adaptability to dust specific resistance.
为实现上述任务，本发明所采用的技术方案是：在静电除尘器壳体内设置有若干对电极，其均由电晕极、电晕极收尘极板、反电晕极和反电晕极收尘极板组成，电晕极和电晕极收尘极板均与直流高压电源的高压端相联接，反电晕极和反电晕极收尘极板均接地。In order to achieve the above tasks, the technical solution adopted in the present invention is: a number of counter electrodes are arranged in the electrostatic precipitator housing, which are all composed of corona poles, corona pole dust collecting plates, counter corona poles and counter corona poles. The dust collection pole plate is composed of the corona pole and the dust collection pole plate of the corona pole are connected with the high-voltage end of the DC high-voltage power supply, and the anti-corona pole and the dust collection pole plate of the anti-corona pole are both grounded.
所述的电晕极、反电晕极分别固定在电晕极收尘极板、反电晕极收尘极板上，并为一体。电晕极与反电晕极的设置或为正对布置、或为相互错开。The corona pole and the counter corona pole are respectively fixed on the corona pole dust collection pole plate and the counter corona pole dust collection pole plate, and are integrated. The setting of the corona pole and the anti-corona pole is either directly opposite to each other or staggered from each other.
当电晕极施加负高压，则形成负电晕放电，产生大量的负离子，而接地的反电晕极此时为正电晕放电，产生大量的正离子。当粉尘通过由电晕极收尘极板与反电晕极收尘极板组成的电场时，与电场中大量的正、负离子发生碰撞，从而使一部分粉尘带上正电，而另一部分粉尘带上负电。在电场力的作用下，带负电的粉尘向反电晕极收尘极板运动，带正电的粉尘向电晕极收尘极板运动，达到反电晕极收尘极板和电晕极收尘极板后，粉尘即被收集下来。同样地，若电晕极施加正高压，则形成正电晕放电，产生大量的正离子，而接地的反电晕极此时为负电晕放电，产生大量的负离子。无论电晕极联接正高压还是联接负高压，都能使粉尘在电场中实现偶极荷电，并分别向极性相反的极板运动，从而被收集下来。When a negative high voltage is applied to the corona electrode, a negative corona discharge is formed to generate a large amount of negative ions, while the grounded counter corona electrode is a positive corona discharge to generate a large amount of positive ions. When the dust passes through the electric field composed of the corona electrode dust collection plate and the counter corona electrode dust collection plate, it collides with a large number of positive and negative ions in the electric field, so that part of the dust is positively charged, while the other part of the dust is negatively charged. Negative charge. Under the action of the electric field force, the negatively charged dust moves to the anti-corona electrode dust collection plate, and the positively charged dust moves to the corona electrode dust collection plate, reaching the anti-corona electrode dust collection plate and the corona electrode After collecting the dust plate, the dust is collected. Similarly, if a positive high voltage is applied to the corona electrode, a positive corona discharge will be formed to generate a large amount of positive ions, while the grounded counter corona electrode will be a negative corona discharge to generate a large amount of negative ions. Regardless of whether the corona electrode is connected to a positive high voltage or a negative high voltage, the dust can be charged to the dipole in the electric field, and move to the polar plates with opposite polarities respectively, so as to be collected.
由于采用上述技术方案，本发明的优点在于：Owing to adopting above-mentioned technical scheme, the advantage of the present invention is:
1、利用直流高压电源可同时产生正电晕和负电晕放电，从而可使电场中的粉尘实现偶极荷电；1. The positive corona and negative corona discharge can be generated at the same time by using the DC high-voltage power supply, so that the dust in the electric field can be charged with dipole;
2、由于电晕极收尘极板和反电晕极收尘极板均为板状，故它们之间可形成均匀的场强，强化了收尘效果；2. Since the corona electrode dust collection plate and the anti-corona electrode dust collection plate are both plate-shaped, a uniform field strength can be formed between them, which strengthens the dust collection effect;
3、电晕极与反电晕极交错布置，可使空间电荷分布更加均匀，有利于粉尘充分荷电；3. Corona electrodes and anti-corona electrodes are arranged alternately, which can make the space charge distribution more uniform and help the dust to be fully charged;
4、由于电晕放电和反电晕放电均在电晕极与反电晕极之间进行。所以，绝大多数电荷流入电晕极与反电晕极，而通过沉积在收尘极板上粉尘层的电流很小，故能有效地抑制高比电阻粉尘的反电晕，从而扩大了静电除尘器对粉尘比电阻的适应范围；4. Both corona discharge and anti-corona discharge are carried out between the corona electrode and the anti-corona electrode. Therefore, most of the charges flow into the corona electrode and the anti-corona electrode, and the current passing through the dust layer deposited on the dust collecting plate is very small, so it can effectively suppress the anti-corona of high specific resistance dust, thereby expanding the static electricity. The scope of application of the dust collector to the specific resistance of dust;
5、结构简单，维护方便，而且易在现有静电除尘器上进行改造，有利于技术推广和实现产业化。5. The structure is simple, the maintenance is convenient, and it is easy to modify the existing electrostatic precipitator, which is conducive to technology promotion and industrialization.
四、附图说明4. Description of drawings
图1是本发明的一种结构示意图；Fig. 1 is a kind of structural representation of the present invention;
图2是图1的电晕放电及反电晕放电原理图。Fig. 2 is a schematic diagram of corona discharge and reverse corona discharge in Fig. 1 .
五、具体实施方式5. Specific implementation
下面结合附图和实施例对本发明作进一步的描述。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
图1是本发明的一种电晕极[2]、反电晕极[4]相互错开的结构示意图。在静电除尘器壳体[1]内设置有若干对电极，均由电晕极[2]、电晕极收尘极板[3]、反电晕极[4]和反电晕极收尘极板[5]组成。电晕极[2]和电晕极收尘极板[3]均与单极性直流高压电源[6]的高压端相联接，反电晕极[4]和反电晕极收尘极板[5]均接地。电晕极收尘极板[3]、反电晕极收尘极板[5]上分别固定有电晕极[2]、反电晕极[4]。电晕极[2]与反电晕极[4]的设置为相互错开布置。Fig. 1 is a structural schematic diagram of a corona electrode [2] and a counter corona electrode [4] of the present invention which are staggered from each other. Inside the electrostatic precipitator shell [1], there are several pairs of electrodes, all of which are composed of corona poles [2], corona pole dust collection plates [3], counter corona poles [4] and counter corona poles for dust collection. Pole plate [5] composition. Both the corona electrode [2] and the corona electrode dust collection plate [3] are connected to the high voltage end of the unipolar DC high voltage power supply [6], and the anti-corona electrode [4] and the anti-corona electrode dust collection plate [5] are all grounded. A corona pole [2] and a counter corona pole [4] are respectively fixed on the corona pole dust collection pole plate [3] and the counter corona pole dust collection pole plate [5]. The corona poles [2] and the counter corona poles [4] are arranged to be staggered from each other.
本装置的工作原理如图2所示，当单极性直流高压电源[6]接通时，电晕极[2]与反电晕极[4]分别产生电晕放电和反电晕放电，所形成的大量正、负离子与进入电场中的粉尘发生碰撞，使粉尘荷电，在电场力的作用下，被电晕极收尘极板[3]及反电晕极收尘极板[5]所捕集。因此，本装置具有如下优点：The working principle of this device is shown in Figure 2. When the unipolar DC high-voltage power supply [6] is switched on, the corona electrode [2] and the counter-corona pole [4] generate corona discharge and counter-corona discharge respectively. A large number of positive and negative ions formed collide with the dust entering the electric field, and the dust is charged. ] captured. Therefore, this device has the following advantages:
1、利用单极性直流高压电源可同时产生正电晕和负电晕放电，从而可使电场中的粉尘实现偶极荷电；1. The use of unipolar DC high voltage power supply can generate positive corona and negative corona discharge at the same time, so that the dust in the electric field can be charged with dipole;
2、由于电晕极收尘极板和反电晕极收尘极板均为板状，故它们之间可形成均匀的场强，强化了收尘效果；2. Since the corona electrode dust collection plate and the anti-corona electrode dust collection plate are both plate-shaped, a uniform field strength can be formed between them, which strengthens the dust collection effect;
3、电晕极与反电晕极交错布置，可使空间电荷分布更加均匀，有利于粉尘充分荷电；3. Corona electrodes and anti-corona electrodes are arranged alternately, which can make the space charge distribution more uniform and help the dust to be fully charged;
3、由于电晕放电和反电晕放电均在电晕极与反电晕极之间进行的，因此通过电晕极收尘极板和反电晕极收尘极板上粉尘层的电流很低，故能有效地抑制高比电阻粉尘反电晕，从而扩大了静电除尘器对粉尘比电阻的适应范围；3. Since both corona discharge and reverse corona discharge are carried out between the corona electrode and the reverse corona electrode, the current passing through the dust layer on the corona electrode dust collection plate and the reverse corona electrode dust collection plate is very small. Low, so it can effectively suppress the back corona of dust with high specific resistance, thus expanding the application range of electrostatic precipitator to dust specific resistance;
5、结构简单，维护方便，而且易在现有静电除尘器上进行改造，有利于技术推广和实现产业化。5. The structure is simple, the maintenance is convenient, and it is easy to modify the existing electrostatic precipitator, which is conducive to technology promotion and industrialization.
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| CNA2005100196662A CN1745902A (en) | 2005-10-26 | 2005-10-26 | A dipole corona electrostatic precipitator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013029436A1 (en) * | 2011-08-29 | 2013-03-07 | 漳州万利达生活电器有限公司 | Stucture of electrostatic de-dusting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013029436A1 (en) * | 2011-08-29 | 2013-03-07 | 漳州万利达生活电器有限公司 | Stucture of electrostatic de-dusting device |
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