The filter barrel dust collector consists of a filter barrel as a filter element or a dust collector with pulse injection. The filter cartridge dust collector can be divided into oblique insertion type, side-mounted type, hoisting type and top-mounted type according to the installation mode. According to the material of filter barrel, filter barrel dust collector can be divided into long fiber polyester filter barrel dust collector, composite fiber filter barrel dust collector, anti-static filter barrel dust collector, flame retardant filter barrel dust collector, membrane-covered filter barrel dust collector, nano-filter barrel dust collector, etc. The working principle of the filter cartridge dust collector: after the dust-containing gas enters the dust hopper of the dust collector, due to the sudden expansion of the airflow section and the action of the airflow distribution plate, some coarse particles in the airflow settle in the dust hopper under the action of dynamic and inertial forces; after the fine-grained and small-density dust particles enter the dust chamber, they pass through the combined effects of Brownian diffusion and sieve filtration. The dust is deposited on the surface of the filter material, and the purified gas enters the purifying chamber and is discharged by the exhaust pipe through the fan. The resistance of the filter barrel type dust collector increases with the increase of the dust layer thickness on the surface of the filter material. Cleaning is carried out when resistance reaches a specified value. At this time, the PLC program controls the opening and closing of the pulse valve. Firstly, the lifting valve of one chamber closes and the filter air is cut off. Then, the electromagnetic pulse valve opens, compressed air and in a short time expands rapidly in the upper chamber and pours into the filter cartridge, which causes the expansion deformation of the filter cartridge to vibrate and attaches to the outside of the filter bag under the action of reverse air flow scouring. The dust on the surface is peeled off and falls into the ash hopper. After cleaning, the solenoid pulse valve closes and the lifting valve opens, and the chamber resumes its filtering state. Cleaning chambers are carried out sequentially, from the first chamber to the next one, which is a cycle of cleaning. The fallen dust falls into the ash hopper and is discharged through the dust removing valve. In this process, the filter barrel must be regularly replaced and cleaned to ensure the filtering effect and accuracy, because in addition to being blocked during the filtering process, some dust will deposit on the surface of the filter material, increasing resistance, so the general correct replacement time is three to five months! Intake duct, exhaust duct, box body, ash hopper, ash cleaning device, diversion device, air flow distributor, filter barrel and electronic control device are composed, similar to the pulse bag dust removal structure of air box. The arrangement of the filter cartridge in the dust collector is very important. It can be arranged vertically on the box ceiling or obliquely on the ceiling. From the effect of dust removal, the vertical arrangement is more reasonable. The lower part of the flower board is a filter chamber and the upper part is an air box pulse chamber. The air distribution plate is installed at the entrance of the dust collector. Product features: 1. Because the filter material is folded into a cylinder, the density of the filter material arrangement is high, so the dust collector has compact structure and small volume; 2. The height of the filter cartridge is small, the installation is convenient, and the maintenance workload is small; 3. The filter area of the same volume dust collector is relatively large, the filtering wind speed is small, and the resistance is small; 4. The folding of the filter material requires two ends to be dense. Seal strictly, there should be no leakage, otherwise it will reduce the effect. The characteristics of the pulse filter cartridge dust collector are as follows: 1. The filter cartridge uses imported polyester fibers as filter material, and adheres a layer of ultra-thin fibers of sub-micron scale to the general filter material, and the arrangement of the fibers on the adhesion layer is very close, the very small sieve hole can block most sub-micron dust particles on the surface of the filter material; 2. The filter material folds. Use, can increase the filter area, and make the structure of the dust collector more compact; 3, the height of the filter cartridge is small, installation and maintenance workload is small; 4, compared with the same volume of dust collector, the filter area is relatively large, the filtering wind speed is small, resistance is small; 5, single dust collector adopts pulse spray online dust cleaning mode. The ash cleaning process is automatically controlled by a pulse controller. A plurality of filter barrels are arranged in the dust collector to increase its effective filter area. When a filter barrel meets the requirements of dust cleaning setting, the spray device is started to clean the dust, and other filter barrels work normally, which not only achieves the effect of dust cleaning but also does not affect the operation of the equipment, so that the dust collector can run continuously; the combined dust collector uses a separate chamber for dust cleaning. Off-line pulse automatic cycle ash removal. Each dust chamber is equipped with multiple filter barrels to increase its effective filter area. When a filter barrel in a dust chamber meets the requirements of dust cleaning setting, the spray device is started to clean the dust, and other dust chambers work normally, which not only ensures the dust cleaning effect but also enables the dust collector to operate continuously. 6. The dust removal efficiency is high (generally up to 99.6%). Performance Indicators: Pulsed air flow is injected directly into the inner of the filter without passing through Venturi. This will cause the filter cartridge to bear negative pressure near one end (upper part) of the pulse valve, while the other end (lower part) of the filter cartridge will bear pressure. This will result in different cleaning of the upper and lower parts of the filter cartridge, which may shorten the service life of the filter cartridge and make the equipment unable to achieve effective cleaning. For this purpose, venturi nozzle for filter cartridge can be installed at the outlet of pulse valve or on the pulse nozzle. The distribution of injection pressure was improved to a more uniform full filter cylinder height positive pressure injection. The accumulation of dust in folding seams of filter cartridges will make it difficult to clean the dust. Therefore, the filter cartridges with large folding area (each cartridge has a filter area of 20-22m2) are generally only suitable for low inlet concentration. Compare the size and area of common filter cartridges. The air separator of the pulse injection device of the filter barrel dust collector shall comply with the requirements of JB/T 10191-2000. Clean air should be free of water, oil and dust. Under the specified conditions, the injection valve and its interface should be free of air leakage, open and close normally and work reliably. The pulse controller should work accurately and reliably, and its injection time and interval can be adjusted within a certain range. When the induction injection device is installed with the nozzle. The nozzle of the induction injection device should be the same as that of the nozzle on the nozzle.
