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Cause Analysis And Solution Of Condensation In All-purpose Industrial Electrostatic Precipitator

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Cause Analysis and Solution of Condensation in All-purpose Industrial Electrostatic Precipitator
All-purpose Industrial Electrostatic Precipitator with its handling of large air volume, the system resistance is small, clean thoroughly, some desulfurization and fluoride function, high efficiency dust removal, favored by the majority of users in the dust market has been widely used. However, many All-purpose Industrial Electrostatic Precipitators in the use of the process are more or less there is condensation phenomenon. Such as improper solution, will make the All-purpose Industrial Electrostatic Precipitator corrosion intensification, filter bag hydrolysis, shorten the life of All-purpose Industrial Electrostatic Precipitator, serious dust can be bonded to the bag surface clogging the pores of the filter bag, leading to general industry The resistance of the electrostatic precipitator is steep until it can not run.
First, the cause of condensation analysis
The so-called condensation, in layman's terms, refers to the wet air in a certain pressure and temperature, precipitation of saturated water phenomenon. The temperature of the precipitation of water is called dew point.
The higher the gas pressure in the saturated state, the lower the dew point. The higher the moisture content in the air, the higher the dew point temperature. When the moisture content in the air is constant, when the temperature of the humidified air is lower than the dew point temperature, the moisture will precipitate in the supersaturated air, that is, the condensation will occur. When the air temperature is higher than the dew point, the moisture will not precipitate. Does not produce condensation phenomenon. In addition, if the SO2 content is contained in the flue gas, the SO2 content is higher and the dew point of the flue gas is higher.
Second, the All-purpose Industrial Electrostatic Precipitator condensation causes
1, All-purpose Industrial Electrostatic Precipitator leakage phenomenon
As a result of All-purpose Industrial Electrostatic Precipitator leakage phenomenon, the outside of a large number of cold air into the All-purpose Industrial Electrostatic Precipitator, the All-purpose Industrial Electrostatic Precipitator local air temperature dropped sharply, the air in the water precipitation, resulting in condensation phenomenon.
There are many reasons for the leakage of common industrial electrostatic precipitators. There are leakage problems caused by leakage welding in the process of production and installation of All-purpose Industrial Electrostatic Precipitator shell. There is a leak in the sealing system of the discharge device, and there are non-standard pipes in the installation process Leakage welding phenomenon caused by air leakage, a All-purpose Industrial Electrostatic Precipitator and non-standard pipe flange connection caused by air leakage and so on.
2, the moisture content in the flue gas is too high
When the treatment of flue gas moisture content is too high, supersaturated water precipitation, resulting in condensation phenomenon. This phenomenon in the dry kiln cement kiln common industrial electrostatic precipitator is particularly prominent, because the dry kiln dust dry kiln is generally used in the humidification tower cooling quenching and tempering treatment, when the spray of water is too large, causing smoke Gas in the gas when the phenomenon of over-saturation will produce condensation.
3, the flue gas temperature is too low
All-purpose Industrial Electrostatic Precipitator to deal with the flue gas itself close to or below the dew point temperature, it will produce condensation.
4, pulse jet gas temperature is too low
All-purpose Industrial Electrostatic Precipitator in the pulse jet cleaning process is the use of compressed air, while the compressed air itself is 100% relative humidity of saturated air. Because of its air pressure greater than atmospheric pressure, conversion to atmospheric pressure dew point than the ambient dew point is low, there is a tendency to break away from condensation. When the compressed air temperature and All-purpose Industrial Electrostatic Precipitator internal flue gas temperature difference is not, generally do not produce condensation phenomenon. But in the winter, especially in the north of China's winter temperatures are usually in the minus ten or several degrees, the pulse of compressed air and All-purpose Industrial Electrostatic Precipitator internal temperature difference is too large, in the compressed air instantly Filter bag temperature also will be significantly reduced, usually white mist spray condensed water mist high-speed airflow, the nozzle below a certain distance within the lower temperature, the formation of low temperature zone. As the compressed air in the nozzle is saturated air, the temperature drop after the gas is discharged will cause the area to be precipitated and cause condensation. At this time the condensation is mainly concentrated in the surface of the bag, the dust attached to the surface of the filter bag due to absorption of condensation of water and produce adhesion, and then plug the pores of the filter bag, resulting in All-purpose Industrial Electrostatic Precipitator can not normal work.
5, All-purpose Industrial Electrostatic Precipitator shell is not thermal insulation measures or poor results
All-purpose Industrial Electrostatic Precipitator shell generally use steel plate structure, and the thermal conductivity of steel plate is very large, when the ambient air temperature and All-purpose Industrial Electrostatic Precipitator internal smoke temperature to form a larger temperature difference, the All-purpose Industrial Electrostatic Precipitator shell Body will produce condensation. All-purpose Industrial Electrostatic Precipitator shell if you do not take thermal insulation measures, or although the use of thermal insulation measures, but the effect is poor, the All-purpose Industrial Electrostatic Precipitator condensation is inevitable.

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