Several cleaning methods for small bag dust collectors are described in detail: Some dust collectors have different structures, so the cleaning methods are also different. The structure of the dust collector and the method of cleaning are all designed according to your operating conditions. Different operating conditions have different characteristics and they are designed and installed according to your needs.
Small Bag Dust Collector
1. The vibration cleaning method uses a mechanical device to fight or shake the frame of the suspended filter bag to cause the filter bag to vibrate and clear the dust. The round bag is mostly applied with vibration at the top to make vertical or horizontal vibration, or vertical Or horizontal vibration in both directions at the same time, the location of the vibration is also in the middle of the filter bag. Because the dust to raise the dust when cleaning, so the vibration cleaning often use the sub-room work system, the entire dust separator is divided into several bags The rooms are cleaned in a room-by-room manner to maintain the continuous operation of small dust collectors. The bag room is cleaned and the air flow is automatically shut off by valves to prevent dusty air from entering. , The vibration can reach several hundred times per minute, which makes the dust fall into the ash bucket. The intensity of vibration cleaning can be represented by the maximum acceleration of the vibration, and the dust intensity and the frequency of the vibration frequency are proportional to the product of the quadratic and amplitude. However, when the vibration frequency is too high, the vibration is not sufficiently propagated to all filter bags, but there is a more suitable range. When using a vibrating motor, generally take the vibration frequency 20-30 times / s, the amplitude is 20-50mm, reduce the amplitude, increase the frequency, can reduce the damage of the filter cloth, and can make the vibration affect the whole filter bag. For dust with strong adhesion, it is necessary to increase the amplitude and reduce the tension of the filter bag to enhance the destructive power of the deposited dust layer. The vibration cleaning method has a simple mechanical structure and reliable operation, but the cleaning effect is weak and it is suitable for textile cloth filter bags.
2. 3. The method of cleaning dust by a small dust remover is also called reverse blowing or counter pressure cleaning.
In this way, the use of the sub-room work system is used. The use of valves to automatically adjust the flow direction of the room to generate and filter airflow. The reverse blow cleaning method uses the inner filter type. Due to the reverse flow and the counter pressure, the cylindrical filter bag is compressed into a star-shaped cross section and causes reverse wind speed and vibration to cause the deposited dust to fall off. Because it is an inner filter type, it is necessary to properly adjust the pull force of the filter bag so that the deformation and contraction of the filter bag is not too great. For this purpose, a metal ring is added at a certain distance in the length direction of the filter bag to control the deformation of the filter bag so that the cleaning effect is evenly distributed to the entire filter bag. During the cleaning period, more than two blowback cleaning operations are performed. Most of such cleaning methods use woven cloth filter material such as 729 filter cloth, and filter-viscous filter material can also be used for dust that is relatively easy to clear. The generation of reverse air flow, the counter pressure is to close the outlet side valve, open the counter-blow valve, and inhale the gas from the atmosphere or the fan discharge pipe to form the reverse air flow: for the positive pressure type, close the hopper inlet side valve and open the backflush The valve, which draws in air from the inlet duct to the fan, forms the reverse air flow. In order to increase the back blowing effect, there is also a form of installing a specialized small fan. The clean-up function of the reverse blow cleaning method is relatively weak, and the damage effect on the filter cloth is smaller than that of the vibration cleaning method. Therefore, the glass fiber filter cloth adopts this cleaning method.
3.Pulse injection cleaning method of small dust remover The perforated plate (flower plate) used for fixing the filter bag is located at the upper part of the box. There is a blowing pipe above each filter bag. The injection pipe faces each filter bag. The center opens a pressure injection hole (mouth). The other end of the injection pipe is connected to a pulse control system composed of a pulse valve, a control valve, and a compressed air tank, and is pulsed according to a predetermined time or resistance value according to an automatic control program. Spray cleaning. Most of the filter bags use an external filter type, with a support skeleton on the inside, and the dust is trapped and settled on the outer surface of the filter bag. At the moment of cleaning, when high-speed jet air passes through the top of the filter bag, it can induce several times the amount of air to be blown and blown together into the interior of the filter bag to form an air wave, which causes the filter bag to swell dramatically from top to bottom. Shock and vibration produce a strong clearing dust. The pulse period can be adjusted, generally from 1 minute to several minutes. According to the flow direction of the pulse jet air flow and the purge air jet, there are three methods: jet-jet, counter-jet, and jet-jet. The direction of the jet is the same for the two airflows. After the purification, the clean air is discharged from the bottom of the filter bag. The actual spray is to divide the filter bag into two parts, half to spray and the other half to spray. During the injection, the filter bag that has been cleaned cannot afford dust collection. Because the injection time is very short, and the filter bags are cleaned for the first time in a row and a row, the dust collection operation can be regarded as almost Continuously, therefore, it is possible to adopt an off-room structure for off-line cleaning or on-line deashing without compartments. The pulse cleaning function is strong, the cleaning effect is better, and the filtering wind speed can be increased. The strength and frequency can be adjusted. The cleaning action is related to the atmospheric pressure venturi structure and whether the jet centerline is consistent with the filter bag centerline. When the filter bag is longer, a better cleaning effect can also be obtained with a better blowing device. Due to strong cleaning effect, it is also effective for viscous filter media. The use of felt filters has also begun to expand. Felt filter media, from the microscopic point of view, can be used as a whole for effective filtration, so its apparent filtration rate can be higher than that of textile cloths, thus miniaturizing the device. The pulse jet device needs compressed air as the energy source. In the cold zone, the water vapor in the compressed air is easy to condense, which affects the blowing effect. Therefore, it should not be put outdoors to take corresponding technical measures to prevent condensation or freezing.
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