1、 The correct method for operating a pulse bag filter is to have personnel regularly replenish lubricating oil for the components that need to be lubricated on the pulse bag filter; Regularly check the normal performance of the dust collector spray system every time the machine is turned on and off, and promptly solve or replace any problems found; At the same time, it is necessary to check whether there is any air leakage in the cylinder and flange, and if so, replace the sealing ring in a timely manner; When the sealing strip on the dust collector maintenance door is found to be aging, it should also be replaced in a timely manner. 2. Pulse bag filter; During operation, the enterprise should have dedicated operators to manage and maintain it, and keep records of every use and maintenance. In addition, operators should understand the working principle and performance characteristics of pulse bag dust collectors, and be familiar with some simple equipment technical parameters and maintenance methods. 3. For the technical parameters of pulse bag filter, such as gas volume, working temperature, smoke concentration, etc., regular inspections should be carried out. If any abnormal problems are found, they should be solved in a timely manner; Enterprises can regularly check the operation status of equipment based on changes in the resistance value of dust collectors; In addition, it is necessary to regularly inspect the vulnerable components in the equipment, check the condition of the air circuit and ash discharge system, and identify and solve problems. 4. Regularly check the water accumulation in the compressed air water separator and promptly remove any issues that may arise. 5. When the pulse bag filter is shut down, the filter and fan should continue to work for a period of time to remove moisture and dust from the filter; After the dust collector stops, it is necessary to repeatedly clean and discharge the dust. 2、 Analysis of the Dust Removal Effect of Pulse Bag Dust Collector Pulse bag dust collector efficiency is one of all dust removal equipment. Currently, pulse bag dust collector has a market share of 80% in the dust removal and purification industry. The reason why it has such a good market share is because the dust removal efficiency of pulse bag dust collector is higher than any other type of dust collector. The quality of dust removal efficiency is a basic parameter for measuring a device. Dust removal efficiency represents the ability of a dust collector to process dust containing gases, and it is directly related to the dust removal rate of the dust removal bag. The dust removal rate of the dust removal bag is influenced by many factors such as dust properties, resistance, dust layer thickness, filter material material, filter air speed selection, and dust cleaning method. Below, we will introduce the factors that affect the dust removal efficiency of pulse bag filters. 1. The influence of dust particle size on the dust removal efficiency of pulse bag filter. For particles with a diameter of 0.2-0.4 μ m, the dust collection efficiency of ordinary dust bags is low in all three working states, because the dust particles in this range are at the lower limit of the "interception effect" and "diffusion effect" of the pulse bag filter. Therefore, dust in the range of 0.2-0.4 μ m is difficult to capture. 2. The working state of dust removal bags has an impact on dust removal efficiency. Dust removal bags of the same model and material have different dust removal efficiencies in different working states. The dust removal efficiency of the initially used dust removal bag is low, and the dust removal efficiency of the dust removal bag decreases after dust accumulation and cleaning. It can be seen that the main dust collection function of the pulse bag filter is the dust layer on the surface of the dust removal bag, usually referred to as the secondary filtration layer, while the dust removal bag only serves to support the dust layer. So the intensity of dust removal should be appropriate, and a thick dust layer should be retained to avoid a decrease in dust removal efficiency. 3. The influence of the structure of the dust removal bag and the dust load on the dust removal efficiency of the pulse bag filter. The size of the dust load deposited on the surface of the dust removal bag is also directly related to the dust removal efficiency of the bag filter. 3、 The reason for the condensation problem of pulse bag filter: 1. Low flue gas temperature: When the temperature of the flue gas processed by the pulse bag filter is close to or lower than the dew point temperature, condensation will also occur. 2. Excessive moisture content in flue gas: When the moisture content in the treated flue gas is too high and supersaturated water is analyzed, condensation occurs. This phenomenon is particularly prominent in the dust collector at the kiln tail of the cement dry line. As the flue gas at the kiln tail of the cement dry line is generally cooled and conditioned using a humidification tower, condensation will occur when the amount of water sprayed is too large, causing the moisture in the flue gas to become supersaturated. 3. The shell of the pulse bag dust collector does not have insulation measures or the effect is poor: the shell of the pulse bag dust collector is generally made of steel plate structure, and the thermal conductivity of steel plate is very high. When the temperature of the outside air forms a large temperature difference with the temperature of the flue gas inside the dust collector, condensation will occur on the shell of the dust collector. If no measures are taken for the shell of the dust collector, or if measures are taken but the effect is not good, the condensation phenomenon of the dust collector is inevitable. 4. Pulse jet gas temperature too low: The pulse bag filter uses compressed air during the pulse jet dust cleaning process, and the compressed air itself is saturated air with a relative humidity of 100%. Due to its pressure being greater than atmospheric pressure, the dew point converted to atmospheric pressure is lower than the ambient dew point, indicating a tendency to detach from condensation. When the temperature of the compressed air is not significantly different from the temperature of the flue gas inside the dust collector, condensation generally does not occur. But in winter, especially in northern China where the temperature is usually in the tens or even tens of degrees below zero, the temperature difference between the compressed air sprayed by the pulse and the flue gas inside the dust collector is too large. When the compressed air is instantly sprayed into the filter bag, the temperature also drops significantly, usually forming a high-speed airflow of condensed water mist in the form of white mist. The temperature below the nozzle is relatively low, forming a low-temperature zone. Due to the fact that the compressed air inside the nozzle is saturated air, the temperature drop after the gas is sprayed will cause water to be analyzed in the area and cause condensation. At this time, condensation is mainly concentrated on the surface of the sprayed filter bag. The dust adhering to the surface of the filter bag absorbs the moisture released by condensation and forms a bond, which then blocks the pores of the filter bag, causing the dust collector to malfunction.
