The protection of air dust filter bag condensation

The protection of air dust filter bag condensation

To prevent condensation, the temperature of the gas in the dust collector and its system must be kept higher than its dew point 25~35℃ (for example, the dew point temperature of the kiln-grinding integrated machine is 58℃, and the operating temperature should be above 90℃). Ensure the good use effect of the filter bag. 

The measures are as follows:

       1. Take appropriate heating measures. If a far-infrared electric heater or electric heater is installed in the dust collector, or a radiator is added to the bag room, the flue gas temperature of the host can be appropriately increased. Strengthen the temperature monitoring of the dust collector and the dust removal system in order to grasp the operating conditions of the bag filter and prevent condensation.

       2. Reduce air leakage. The air leakage in the gap of the dust collector body, and the air leakage of the bag filter body should be controlled below 3.5%. In the dust collector system, the air leakage of the process equipment, such as the closed ash discharge valve of the discharge port of the ball mill, the air leakage of the closed ash discharge valve under the dust collector, and the pipe flange connection, are often ignored by maintenance and management personnel. , Increased unnecessary air leakage and worsened the operating conditions of the bag filter.

       3. Adding raw material storage sheds. In the production of cement, various raw materials, fuels and mixed materials have different moisture content. If they are placed in a fixed shed to prevent rain, the moisture content of the materials can be greatly reduced. This is an effective measure to reduce the moisture content of the materials. This situation is relatively common in cement plants in southern my country, but some of the material storage sheds are too small, and some are not. Therefore, it causes certain difficulties in the use of bag filters.

       4. Do a good job of heat preservation and rain protection for dust collectors, pipelines and other relevant places. Practice has proved that good heat preservation measures can make the temperature difference between the inlet and outlet of the bag filter very small, which is an effective measure to prevent condensation.