1、 The dust filter bag is the heart of the bag filter during operation; It is generally referred to as a dust collector bag or dust filter bag, and the cylindrical pulse type dust collector bag is usually suspended vertically in the dust collector. The dusty gas enters the dust collector through the air inlet and enters the interior of the filter bag after being introduced into the body through the inlet. The dust is trapped on the inner surface of the filter bag, and the purified gas is collected and distributed through the filter before being discharged from the body through the gas outlet. The dust collection and cleaning process relies on the up and down reciprocating operation of a back blowing device (air ring box) tightly fitted on the outside of the dust removal filter bag. There is a circular narrow gap on the inside of the air ring box, which is closely attached to the filter cloth. The air flow sent from the high-pressure blower is sprayed from the narrow gap to blow off the dust adhered to the inside of the filter bag. Only a small section of each filter bag is cleaned, and the rest is cleaned as usual. Therefore, the dust collector works continuously. The dust collector bag plays a decisive role in dust removal equipment. 2、 The production of dust collector bags: 1. Classify according to the direction of the bag's air filtration. According to the direction of air filtration in the bag, it can be divided into the following categories: 1. External filtration type: on the outer side of the track facing you, there is a very dusty airflow inside the bag, and the dust layer accumulates on the outer surface of the bag. External filtering includes round bags and flat bags. 2. Internal filter type: The dust facing surface is on the inside of the bag, and the dusty airflow flows from the inside of the bag to the outside of the filter bag. The dust layer accumulates on the inner surface of the filter bag. 2. Classify by cross-sectional shape. The circular cloth bag is cylindrical in shape; Circular cloth bags are divided into long bags and short bags according to their length. Its specifications are expressed as diameter * length. Flat cloth bags include rectangles and trapezoids, and their specifications are expressed as perimeter * length. The specifications of filter bags with irregular bag shape features are represented by the characteristic parameters of their construction. The bag of the bag filter is the core component of the dust collector. There are strict requirements for the design of bag size, cutting of filter media, and processing and manufacturing of filter bags. These requirements are of great significance for the normal operation and convenient maintenance of bag filters, as well as for extending the service life of bag filters. Composition and classification of cloth bags: cloth bag composition. The bag is the core component of the bag filter for dust removal. The filter bag consists of a bag body sewn with filter material and auxiliary accessories such as clamps, hanging chains, etc. 3、 What are the reasons for the damage of the dust collector bag? The fabric and design of the dust collector bag should strive for filtration, easy dust stripping, and long-lasting effect. The selection of dust collector bag is crucial as it directly affects the dust removal effect of the dust collector. The selection of dust collector bag should be based on the following factors: gas temperature, humidity and chemical properties, particle size, dust concentration, filtration wind speed, dust cleaning method, etc. The main reasons for the damage of dust collector bags are generally as follows. 1. Dust medium: The choice of bag fabric for dust collectors depends on the nature of the dust, taking into account whether the dust contains acidic, alkaline, or highly corrosive substances. Suitable filter media should be selected according to the nature of the dust, so that the filter bag can absorb dust normally without affecting its service life. 2. Filtering wind speed: The high filtering wind speed of the bag filter is the main cause of bag damage in the dust collector. In recent years, some units have blindly reduced equipment costs and increased profits by increasing the filtration wind speed when designing bag filters. Although there is no obvious response from users in a short period of time, the service life of filter bags has been shortened. This not only does not save customers money, but also brings a huge economic burden and wastes time. 3. Product quality: The processing of cloth bags is particularly important. In recent years, some small manufacturers have used small sewing machines as processing equipment, and inferior thread is used as raw material during processing, resulting in fake and genuine products. The processing level is also far behind, which leads to the occurrence of thread breakage, cracks, and bottom dropping of filter bags before they are used for a long time. Although a slightly smaller bag size can still be used, after adsorbing dust with a higher specific gravity, the bag will fall off after a period of use. 4. Temperature of use: Choosing the appropriate dust collector bag suitable for the corresponding dust temperature is the key to filter bags. If the temperature is too high, the selected dust collector bag will exceed the normal operating temperature. The filter bag will shorten its service life if it is light, and in severe cases, it will burn out in a short period of time. Therefore, when selecting filter bags, it is necessary to measure and calculate the temperature of the dust collector before selecting the corresponding dust collector bag. 4、 The factors that cause the aging of dust collector bags can be as high as. Dust collector bags have a high dust removal efficiency and are commonly used dust removal tools today. However, improper use can cause premature aging and failure. Therefore, careful selection of materials and reasonable use are the key to the longevity of dust collector bags. When using, special attention should be paid not to block the dust collector bags, as they become prone to wear, perforation, and detachment. In order to solve the blockage, it is necessary to shorten the cleaning interval and strengthen the cleaning force, which can easily cause damage to the dust collector bags and accelerate their aging. Therefore, it is necessary to use dust collector bags reasonably. Dust collector bags are commonly used dust removal and environmental protection products in today's society. Their dust removal rate makes them highly favored in industrial production. However, sometimes dust collector bags may experience aging, which is not solely due to prolonged use. Sometimes, the impact of working conditions can also cause aging of dust collector bags. Therefore, extra attention should be paid when using them to prevent aging. The main reasons for the aging of dust collector bags are as follows, which we will introduce below. 1. The blockage of the dust collector bag will increase the resistance and shorten the cleaning interval, which will accelerate the aging of the dust collector bag. 2. Acid alkali imbalance can cause corrosion of the dust collector bag when it comes into contact with acid or alkali. Therefore, prolonged acid-base imbalance can also lead to aging of the dust collector bag. 3. The moisture in the flue gas can be decomposed by some dust collector bags that come into contact with moisture for a long time, such as those made of polyester. Therefore, dust collector bags that are decomposed by water are prone to aging. 4. Abnormal operating temperature, if the temperature is too high, it will cause the dust collector bag to be burnt black or destroyed; If the temperature is low, it will accelerate the condensation phenomenon of the dust collector bag, leading to the easy occurrence of bag sticking. Over time, the dust collector bag will age and even affect its service life.
