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The electrostatic precipitator is a widely used dedusting equipment in China. When we use the electrostatic precipitator, the dust removal efficiency of the electrostatic precipitator will decrease due to various links. Today we will talk about using the electrostatic precipitator Matters .
The electrostatic dedusting equipment uses electrostatic force to decompose the dust to filter and collect the dust in production. The electrostatic precipitating equipment is mainly based on the filtering principle of two types of equipment: discharge electrode and dust collector. In addition, electrostatic dedusting equipment is generally designed with two-pole vibrating and clearing design, gas average design, ash discharge system and main box.
The precautions for using electrostatic precipitator are as follows:
Dust concentration The electrostatic dedusting equipment has a certain range of adaptation to the concentration of dust in the purified gas. If it exceeds a certain range, the dust removal efficiency will be reduced, and the dust removal process may stop. 正常运行时，电晕电流是由气体离子和荷电后尘粒（离子）两部分组成的，但前者的驱进速度约为后者的数百倍（气体离子平均速度为 60 ～ 100m ／ s ；粉尘速度大体在 60cm ／ s 以下），一般粉尘离子形成的电晕电流仅占总电晕电流的 1 ％～ 2 ％。 Because the electrostatic precipitator is in normal operation, the corona current is composed of gas ions and dust particles (ions) after being charged, but the driving speed of the former is about hundreds of times of the latter (the average velocity of gas ions is 60 ~ 100m / s ; dust velocity is generally below 60cm / s ), and the corona current formed by dust ions generally accounts for only 1 % to 2 % of the total corona current . The dust mass is much larger than that of gas molecules, and the speed of movement of ion current on charged dust particles is much lower than that of gas ions. The greater the dust concentration in the flue gas, the more the dust particle ions, but the total space charge per unit volume remains the same, so the more dust ions, the space charge formed by the gas ions will inevitably decrease accordingly. Speed decreases and corona current decreases. When the dust concentration reaches a certain limit, the current passing through the electric field approaches zero, corona occlusion occurs, and the dust removal efficiency decreases significantly. 。 Therefore, when the electrostatic precipitator purifies the flue gas, its gas dust concentration should have a certain allowable limit .
Precautions for using electrostatic precipitator
24 ． The particle size and composition of the highest dust-containing dust allowed by the electrostatic precipitator are related, for example, the median diameter is 24 . 的粉尘，入口质量浓度大于 30g ／ m3 电流下降不明显；而对中位径为 3 ． For dust at 7pm , the inlet mass concentration is greater than 30g / m3, and the current drop is not obvious; while the median diameter is 3 . 的粉尘，入口质量浓度大于 8g ／的吹氧平炉粉尘，电晕电流比通烟尘之前下降 80 ％以上。 At 2pm , the corona current of the oxygen-blown open-hearth dust with an inlet mass concentration greater than 8g / is reduced by more than 80 % than that before the soot . 1pm 左右的粉尘对电除尘效率的影响尤为严重 According to some data , the effect of dust with a particle size of about 1pm on the efficiency of electrostatic precipitator is particularly serious.
A better way to prevent the efficiency of the electrostatic precipitator from falling due to excessive dust content in the flue gas is to add a pre-level precipitator. First reduce the dust concentration of the flue gas, and then send it to the electrostatic precipitator after meeting the requirements. However, some dust removal equipment manufacturers believe that pre-level dust removal will cause dust to condense, thereby reducing the efficiency of the electrostatic precipitator.
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使用注意事项问题，或者需要我们提供看现场、设计方案请联系我们，谢谢！ More attention to the use of electrostatic dedusting equipment, matters needing attention to the use of dust removal equipment , or need us to provide on-site viewing, design solutions, please contact us, thank you!