1.the choice of gas cloth ratio
The choice of air-to-cloth ratio is actually the amount of flue gas passing through each unit of filter media. For a small bag filter, the air-to-cloth ratio is the ratio of the volume of gas at the inlet to the area of the filter cloth. In order to find the best air-to-cloth ratio, the type of filter, the method of cleaning, and the performance of the dust remover are the main criteria. If the wind speed of filtration is high during the dust removal process, due to the uneven distribution of air flow, secondary dusting can easily occur. If the filtered wind speed is low, there is a strong possibility of resistance due to operation. Larger, resulting in frequent cleaning, resulting in increased investment costs, the corresponding economic benefits will be reduced. In general, the speed of the filtered air needs to reach a speed of 1 meter per minute. If the dust collector is a high dust concentration, the filtered wind speed needs to be less than 0.8 meters per minute, so as to ensure the uniform distribution of the air flow, as much as possible. Dust removal efficiency.
2.the quality of the filter
For bag filter, the quality of the filter has a direct impact on the efficiency of the dust removal, so in the production process, it needs to strictly control its quality. In the process of selecting the filter material, not only the hardness of the particles should be taken into consideration, but also the characteristics of the dust and the characteristics of the smoke gas must be taken into consideration. These influencing factors should be integrated to select the best filter material. Under normal circumstances, the filter material with higher dust removal efficiency has the following characteristics: anti-erosion, good air permeability, anti-wear, and meeting the site requirements.
3.cleaning methods
(1) Pulse back blowing
This method of cleaning is based on the principle of back-flush air pressure. According to the different pressures, it can be divided into two modes, namely low-pressure pulse backflushing and high-pressure pulse backflushing. At present, the application of this cleaning method has been popularized and the cleaning effect is relatively good. However, there is a disadvantage in this method of cleaning, that is, there must be a source of compressed air, otherwise there is no way to work properly.
(2) Counter-flow backblowing
The counter-blowing counter-blowing method is actually to let the air in the opposite direction blow back through the dust layer and the filter bag. Under the effect of the air flow, the dust on the filter bag can fall off. In the process of dust removal using air flow, the dust removal mechanism is very simple and easy to maintain, but the interior of the filter bag must require a corresponding support structure, such as a grid or support ring, so that the filter bag will not be flattened. There will be no adhesion phenomenon, and it can also protect the primary layer.
(3) Mechanical vibration cleaning method
The mechanical vibration cleaning method is mainly used for cleaning the top of the equipment and the middle of the equipment. This kind of cleaning method mainly relies on the periodicity of the mechanical vibration device and carries out the rotational vibration on the filter bag so as to achieve the purpose of removing dust. This kind of cleaning method is not only stable in performance, but also has a very simple structure and is easy to operate. It is more suitable for dust removal with low dust concentration and small air volume. However, the working time of this dust removal method cannot last long.
4.improve ideas
For further dust removal efficiency, the dust collector can be reconstructed in the on-site environment, and some new dust-collecting pipeline paths can be arranged and used to switch with the original pipeline path. Some vacuum hoses or suction can also be set in the field. Dust heads, using various types of vacuum heads can pick up the dust on the surface of the device, so as to achieve a safe and efficient purpose.