The structural composition of a large long bag pulse bag dust collector: The large long bag pulse bag dust collector is a dry dust removal equipment. 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 dust collector, the large and heavy dust particles settle down due to gravity and fall into the ash hopper. When the gas containing smaller dust passes through the filter material, the dust is retained, purifying the gas. The dust removal efficiency of general new filter media is not high enough. After using the filter material for a period of time, due to screening, collision, retention, diffusion, static electricity and other effects, a layer of dust accumulates on the surface of the filter bag, which is called the initial layer. During the subsequent movement process, the initial layer becomes the main filtering layer of the filter material. With the help of the initial layer, filter materials with larger mesh holes can also achieve higher filtration efficiency. As dust accumulates on the surface of the filter material, the efficiency and resistance of the large long bag pulse bag dust collector increase accordingly. When the pressure difference between the two sides of the filter material is large, some small dust particles that have already adhered to the filter material will be squeezed away, causing the efficiency of the large long bag pulse bag dust collector to decrease. In addition, excessive resistance of large long bag pulse bag dust collectors can significantly reduce the airflow of the dust removal system. Therefore, after the resistance of the large long bag pulse bag dust collector reaches the numerical value, it is necessary to clean the dust in a timely manner. When cleaning, the initial layer should not be damaged to avoid a decrease in efficiency. The large long bag pulse bag dust collector is a new type of long bag pulse bag dust collector developed by drawing on technology. It is a new type of bag type dust collector developed on the basis of conventional short bag pulse dust collectors. It not only integrates the characteristics of chamber blowback and pulse dust cleaning, but also overcomes the shortcomings of insufficient chamber blowback intensity and general pulse dust reattachment. It also extends the filter bag, fully exerting the role of compressed air dust cleaning. It is a large-scale dust removal equipment with small footprint, stable operation, performance, and easy maintenance. It can be widely used in industries such as metallurgy, casting, building materials, mining, and chemical engineering. The large long bag pulse bag dust collector is a low-pressure pulse bag dust collector developed by engineering technicians based on the spray pulse dust removal technology to meet the needs of high air volume flue gas purification. It not only has the characteristics of cleaning, dust removal, and low emission concentration compared to a back blowing bag filter, but also has the characteristics of stability, low air consumption, and small footprint, making it particularly suitable for handling high air volume flue gas. Large scale long bag pulse bag dust collectors have been widely used worldwide and widely promoted in China. The large pulse long bag dust collector mainly consists of an upper box, a middle box, an ash hopper, an ash unloading system, a spraying system, and a control system, and adopts a lower air intake structure. The dusty flue gas enters the ash hopper through the inlet of the bag filter and the lower part of the middle box; Some larger dust particles fall directly into the ash hopper due to inertial collision and natural settling, while other dust particles rise with the airflow and enter various bag chambers. After being filtered by the bag filter bag of the bag filter, the dust is trapped outside the bag filter bag. The purified gas enters the box through the bag filter bag and is then discharged into the atmosphere through the bag mouth and upper box through the air outlet. The dust in the ash hopper is discharged from the conveying system in a timed or continuous manner. Widely applicable, it is used for the purification of dust containing gases at room temperature or higher in industries such as cement, metallurgy, petrochemicals, building materials, grain, machinery, carbon black, electricity, waste incineration, and industrial kilns, as well as the recovery of powdered materials. The performance characteristics of a large long bag pulse bag dust collector include: 1. Adopting pulse jet cleaning technology, it can clean and remove dust with low emission concentration, low air leakage rate, low energy consumption, low steel consumption, small footprint, stable operation, and good economic benefits. Suitable for flue gas dust removal in metallurgy, building materials, machinery, chemical, power, and light industry industries. 2. The box adopts an airtight design with good sealing performance. The inspection door uses excellent sealing materials, and during the manufacturing process, kerosene is used for leak detection, resulting in a very low air leakage rate. 3. The layout of the inlet and outlet air ducts is compact, with low airflow resistance. 4. The use of segmented air stop pulse spraying for dust cleaning has a long cleaning cycle and low consumption, which can double the lifespan of filter bags and valve plates. 5. It can achieve non-stop bag replacement and maintenance without affecting the normal operation of the equipment. 6. The operation of changing bags was carried out using the upper bag extraction method. The working mechanism of a large long bag pulse bag dust collector is that the dust containing flue gas passes through the filter material, and the dust particles are filtered out. The filter material mainly captures coarse dust by inertial collision, while capturing fine dust mainly relies on diffusion and screening. The dust layer of the filter material also has a filtering effect. The dust removal efficiency of large long bag pulse bag dust collectors is related to various factors, but mainly depends on the filter material. The filter material of a large long bag pulse bag dust collector is a fabric or felt woven from synthetic fibers, fibers, or glass fibers. Sew the cloth or felt into cylindrical or flat filter bags as needed. Select filter media suitable for the application conditions based on the properties of the flue gas. Usually, when the flue gas temperature is below 120 ℃ and acid resistance is required for the filter material, polyester velvet cloth and polyester needle punched felt are often used; When dealing with high-temperature flue gas (
