Aspects to be aware of when using a new bag
1. Check the bag room of the dust collector, pay attention to whether there is condensation, and make sure that the ash discharge system is unblocked to avoid corrosion and blockage. The dust accumulation of the dust collector may affect the production of the main machine.
2. The installation situation of the dust bag, whether there is bag drop, loose mouth, wear and the like after the test run, after the operation, the dust discharge of the chimney can be visually judged.
3. Handle air volume and pressure and temperature at each test point to match the design.
4. Fan rotation direction, speed, bearing vibration and temperature.
5. The cleaning time and the cleaning cycle are important factors for the dust collection performance and operation status, so it needs to be adjusted according to the situation. If the cleaning time is too long, the attached primary dust layer will fall off. Excessive cleaning is an important cause of damage and leakage of the dust bag. The cleaning time is too short, the dust on the dust bag has not been cleared, the filtration operation is resumed, the cleaning effect is poor, the resistance of the dust collector is rapidly increased, the energy consumption is increased, and the dust removing effect is affected.
Select the dust bag to be based on the nature of the gas
When purchasing dust bags, enterprise users need to measure and analyze the filter gas first, and make appropriate choices according to the measurement results and referring to the filter material properties of various dust bag. In addition, the fiber properties of the dust bag should conform to the design of the dust collector. In order to fully utilize the performance of the dust bag, it is necessary to take into consideration the auxiliary equipment such as the pre-dusting device and the gas cooling device.
Dust bag has a short life and is easy to break. From the results of analysis of the dust bag after use, most of the cases are caused by the use of the performance range of the dust bag, especially due to the influence of high temperature. There are many examples of short life of dust bag. Due to some negligence in management, the gas temperature tends to change frequently in a state that exceeds the heat-resistant temperature of the dust bag, so it is preferable to use a dust-proof bag with a relatively high heat resistance in a high-temperature condition.
The principle of choosing a dust bag
When selecting a dust bag, it is usually necessary to consider the nature of the flue gas, the nature of the dust in the gas, and the cleaning method of the bag filter. The following principles must be followed when selecting.
1. The performance of the dust bag should meet the general conditions and special requirements of the production conditions such as the temperature of the main body and the dust, the acidity and alkalinity, and whether there is an explosion hazard and the dust removal process.
2. Under the above premise, the filter bag with long service life should be selected. This is because the long service life reduces the labor and material costs of bag change, saves operating costs, and can meet the requirements of long-term gas emission standards.
3. When selecting the material of the dust bag, the various filter materials should be sorted and compared. The so-called “good†filter material is not suitable for all working conditions.
4. Among the three factors of gas properties, dust properties and cleaning methods, the main influencing factors should be seized to select filter materials, such as high temperature gas and flammable dust.
The principle of dust collector bag for different working conditions is different from the factors to be considered. In general, it is necessary to comprehensively consider the selection of suitable dust bag, so as to improve the efficiency of the dust collector and reduce the cost.
Source: Guangzhou Xinrui Environmental Protection
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