Welding smoke purifier to purify dust has certain adaptation scope

Welding smoke purifier has certain adaptation for the purification of dust dust concentration range of welding smoke purifier to purify the dust concentration of the gas has certain adaptation scope, if over a certain range, the dedusting effect can reduce and even stop dust removal process for the normal operation of electrostatic precipitator, the corona current is made up of gas ion and charged following granule ( Ions) Composed of two parts, but the former flooding into speed hundreds of times about the latter ( The average speed of gas ion is 60 ~ 100 m/s; Dust speed generally under 1500 p/s,) General dust ion formation of the corona current accounts for only 1% ~ 2% of total corona current. The ion flow effect on the charged dust particles produced by the movement speed is less than the gas ions generated by high speed. Contains dust concentration in flue gas, the greater the dust ion is, the more the total space charge per unit volume remains the same, however, so the more dust ion, which is formed by the gas ion space charge accordingly necessarily decrease, and the electric field flooding into speed is reduced, the corona current decline. When the dust concentration reaches a certain limit, by electric current is close to zero, corona occlusion occurs, a significant reduction in the dust removal efficiency. So electrostatic precipitator purification of flue gas, dust concentration of the gas should have certain acceptable limit. Welding smoke purifier to allow the highest dust dust particle composition, such as the median diameter of 24. 7 m of dust, the entry mass concentration is greater than 30 g/m3 current decline is not obvious; While the median diameter of 3. 2 m of the dust, the entry of mass concentration is greater than 8 g/m3 oxygen open-hearth dust, corona current ratio decreased by more than 80% of smoke before. Have information that the dust particle size is 1 m or so particularly serious impact on the efficiency of the electric. To overcome the electrostatic precipitator efficiency decline caused by excessive smoke dust content the better way is to set the prestage of dust collector. To reduce the dust concentration of flue gas, make it meet the requirements and then into the electrostatic precipitator. There are also people who believe that prestage dust can make the powder agglomeration, thus reducing the efficiency of electrostatic precipitator.

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