The dust removal efficiency of pulse bag filter under different working states: Pulse bag filter is a dry dust filtering device. It is suitable for capturing small, dry, non fibrous dust. The filter bag is made of textile filter cloth or non-woven felt, and uses the filtering effect of fiber fabric to filter the dusty gas. When the dusty gas enters the bag filter, the large and heavy dust particles settle down due to gravity and fall into the ash hopper. When the gas containing finer and smaller dust passes through the filter material, the dust is retained, purifying the gas. 1、 Dust removal efficiency under different working conditions: The same dust removal bag will also have different dust removal efficiencies under different working conditions. The dust removal efficiency of the bag after cleaning is low, while the dust removal efficiency of the bag with accumulated dust is indeed high, but the efficiency will decrease after removing the dust. From this, it can be seen that the reason why the dust removal bag plays a role in dust removal is because the layer of dust on the surface of the dust removal bag filters the dust twice. So in fact, when cleaning the dust removal bag, some dust on the bag should be properly retained. 2、 The quantity of dust particles: Excessive accumulation of dust on the surface area of the dust removal bag can directly affect the dust removal efficiency of the bag filter. 3、 The size of dust particles: Bag filters are difficult to capture dust with a diameter of 0.2-0.4 μ m. Dust within this range is the critical value for both "interception" and "spreading" in the working principle of bag filters, making it difficult to capture. Reasons for excessive emissions from pulse bag dust collectors: Firstly, the newly installed clean dust collector has larger bag pores, resulting in a higher dust passing rate at the beginning of use, and has not yet reached the optimal filtering state, leading to higher dust emissions. As the filtration process progresses, dust accumulates on the outer surface of the filter bag to form a dust layer, reducing the pores on the outer surface of the filter bag and improving dust removal efficiency. The role of "dust filtration" can remove fine dust or more. Therefore, the determination of the dust removal efficiency of the pulse bag filter is accurate after continuous use for one month. 2、 Check if the installation of the dust collector bag is correct. The typical pulse bag filter relies on elastic expansion rings sewn onto the filter bag mouth to press the filter bag into the flower plate hole, and strictly distinguish the dust chamber of the middle box from the clean chamber of the upper box through the flower plate. If the elastic expansion ring at the filter bag mouth fails to fit tightly with the flower plate hole, resulting in gaps, it will cause the dusty airflow to directly enter the clean air chamber, and the exhaust pipe outlet will emit dust. You can check the installation of the dust removal filter bag one by one, and if any gaps are found, they should be tightly sealed. During the installation process of the pulse bag filter, the installation quality of the filter bag is one of the supervisory inspections. 3、 Damaged dust removal bags will result in direct discharge of dusty airflow and ash emission from the exhaust pipe outlet after the dust collector. For large pulse bag filters used for offline dust cleaning, the following method can be used to determine the location of bag breakage: manually clean each compartment one by one, close the air outlet valve of one compartment each time, and pay attention to the exhaust pipe outlet. When the compartment with bag breakage stops filtering, the exhaust pipe outlet will no longer emit dust, and based on this, determine which compartment has bag breakage. 4、 For dust collectors with only partitions separating the inlet and outlet channels, it is necessary to check whether the middle partition is welded tightly. If there are welds or gaps in the middle partition, dust from the intake air will enter the exhaust duct, causing dust to fly out of the exhaust pipe outlet. The welding quality of the middle partition separates the inlet and outlet air channels, which is another quality inspection in the production and installation of pulse bag dust collectors. Factors affecting adsorption in pulse bag dust collectors: The factors affecting adsorption in pulse bag dust collectors include the properties of the adsorbent, the properties of the adsorbate, and operating conditions. Only by understanding the factors that affect adsorption can suitable adsorbents and operating conditions be selected to complete the task of adsorption separation. 1、 Under normal operating conditions, low-temperature operation is beneficial for physical adsorption, while appropriately increasing the temperature is beneficial for chemical adsorption. But whether to raise or lower the temperature is based on the adsorption process and the change in adsorption temperature. If the temperature changes to a positive value, the increase in temperature is beneficial for the adsorption operation; On the contrary, lowering the temperature is beneficial for the adsorption process. The influence of temperature on gas-phase adsorption is greater than that on liquid-phase adsorption. For gas adsorption, increasing pressure is beneficial for adsorption, while decreasing pressure is beneficial for desorption. 2、 The properties of the adsorbent, such as porosity, pore size, particle size, etc., affect the specific surface area and thus the adsorption effect. Generally speaking, the smaller the particle size or the more developed the micropores of the adsorbent, the larger its specific surface area and adsorption capacity. However, in the liquid-phase adsorption process, the surface area provided by micropores does not play a significant role for adsorbates with relatively high molecular weight. 3、 The properties and concentration of the adsorbate have an impact on gas-phase adsorption, and the equivalent diameter, relative molecular weight, boiling point, saturation, and other factors of the adsorbate affect the adsorption capacity. If the same type of activated carbon is used as an adsorbent, for structurally similar substances, the larger the relative molecular weight and unsaturation, the higher the boiling point, and the easier it is to be adsorbed. For liquid-phase adsorption, the molecular polarity, relative molecular weight, and solubility in solvents of the adsorbate affect the adsorption capacity. The larger the relative molecular weight, the stronger the molecular polarity, the lower the solubility, and the easier it is to be adsorbed. The higher the concentration of adsorbate, the smaller the adsorption capacity. 4、 The activity of an adsorbent is a sign of its adsorption capacity, often expressed as a percentage of the ratio of the adsorbed mass on the adsorbent to the total amount of adsorbent. Its physical meaning is the adsorption mass that a unit adsorbent can adsorb. 5、 When performing adsorption operations, the contact time between the adsorbate and the adsorbent should be sufficient to approach equilibrium and fully utilize the adsorption capacity of the adsorbent. The time required for adsorption equilibrium depends on the adsorption rate, and the optimal contact time is generally determined through economic trade-offs. 6、 The performance of the adsorber of the pulse bag filter has a significant impact on the adsorption effect. The structure of the adsorber and the laying of the adsorption layer should be designed reasonably to achieve excellent adsorption performance.
