The wide application of Junzheng fold dust bag in bag dust collector
Folding dust bag , dust bag, Yicheng fold dust bag, Botou fold dust bag, as the name implies, is a fold dust bag, using the method of folds to make the area of the traditional cylindrical dust bag to add filter cloth, so as to reach the additional bag dust The filter area of the filter makes the overall parameters of the dust collector larger, increases the air volume of the dust collector, and handles more dust.
The pleated dust bag is generally made of 8 pleats, and the skeleton corresponding to the pleated bag is also required to be specially customized to allow the skeleton to be smoothly installed in the bag and support the pleated bag. The pleated dust bag is double the filtering area of the traditional dust bag. One pleated dust bag can reach the filtering area of the traditional two dust bag. This pleated bag is applied to the dust collector. Under the same standard parameters, the area smaller.
The pleated dust bag can directly replace the existing round (oval) filter bag and keel of the dust collector without structural modification of the main equipment. According to the system planning and requirements, the filtering area can be generally increased by 50-150%, which significantly reduces the system pressure difference and improves the system. Overall performance and life expectancy. The dust removal frequency is significantly reduced or the dust removal distance is extended. Compared with ordinary cloth bags, the pulse dust removal efficiency (same filter material) is significantly improved due to its special structure. The useful bag distance is increased, and the rising speed of the air flow between the bags is reduced, which greatly optimizes the online dust cleaning effect:
The special plan for the dust bag / keel greatly reduces the fatigue damage and intermittent emissions caused by pulse blowing. The keel has no lateral support ring and has a large useful contact area. It can completely avoid the direct impact on the bag. According to demand, it can add filtering area while adding filtering area. , Shorten the length of the bag to optimize the system operation, greatly reduce the amount of compressed air and the load of the air compressor and pulse valve. The fan load is greatly reduced, and the energy consumption of the system is significantly reduced. System maintenance costs (energy consumption, auxiliary equipment, parts and labor) have decreased significantly. Can use any existing filter media (polyester, polypropylene, acrylic, PPS, aramid, P84, PTFE, glass fiber, and a variety of filter media and various treatments, including PTFE coating) to meet the system requirements
1. What are the requirements of pleated dust bag for spray pressure?
The blowing pressure is related to the air-to-cloth ratio. The pleated dust bag is better for low and medium pressure. For example, a 2.5-meter dust bag with a general valve can be used at about 0.3-0.5MPa, and the general high-pressure injection plan for a round bag is generally high-pressure 0.5-0.7 MPa, it is not a problem to use in the wave dust bag, but it is not necessary.
2. How to remove dust from pleated dust bag?
The useful inner diameter of the pleated dust bag is very small. Compared with the round bag, it has an irregular shape. The pulse air flow can shake off the filter cake without completely defeating the negative pressure. The dust removal is completed. The pleated bag has a relatively loose part in the middle. The amplitude of oscillation is large at this time, and it is easy to remove dust. The folds are shallow and the space in the middle is relatively large, which will not cause agglomeration like the dust removal of the filter cartridge.
3. Do you need to change the dust bag empty space?
Regarding the transformation of the traditional bag filter, the distance of the bag can be the same as that of a general round bag. Regarding the newly planned dust collector, in principle, the larger the distance, the better, but the larger the distance, the larger the dust collector volume will increase the cost, so the general planning will take an optimized distance.
4. How is the air-to-cloth ratio of the pleated dust bag different?
In principle, the air-to-cloth ratio of the new dust collector can be planned as a general round bag, that is, 1.0-1.2m / min. 5. Can the energy consumption be saved, and through what aspects? Under the same conditions, the dust removal of the pleated dust bag will be better than that of ordinary round bags. Under the same air-to-cloth ratio, the compressed air consumption will decrease. The blowing frequency will decrease (the blowing distance will be extended), and the life of the blowing valve will also be lower. It will be extended. If the same number of round bags are used to handle the same air volume, the energy consumption of the fan will be reduced by about 40-50% (this is related to the planned air-to-cloth ratio)-this is the use of corrugated dust bags instead of round bags Case (i.e. retrofit of existing dust collector).
The pleated dust bag is applied near the bag dust collector. Its function principle is that the dust-containing particles are intercepted due to the inertia force and the fibers colliding with the fibers when they are around the filter cloth fibers. During the operation of the bag filter, dust is attached to the outer surface of the bag. When the dust-containing gas passes through the filter, the dust is captured on the outer surface of the bag, and the clean gas enters the bag through the filter material. The framework inside the dust bag is used to support the filter bag and prevent the filter bag from collapsing. At the same time, it helps to remove and redistribute the dust cake.
The pleated dust bag is made of polyester, polypropylene, and other materials. The polyester needle felt has outstanding breathability, high open space, high dust collection efficiency, and long service life. The temperature is generally 80-120 ° C, and the instant temperature can reach 150 ° C The acid and alkali resistance is moderate. The polypropylene needle felt felt bag has higher acid and alkali resistance, can resist strong acids and alkalis, has excellent recovery of dust with high corrosivity, and uses long life.
Folding dust bag is widely used in cement, chemical, coal, pharmaceutical and other environments to ensure that the dust bag can recover dust. Polyester and polypropylene are the most widely used materials near the dust bag. Post-treatment methods such as light or coating.
Folding dust bag performance characteristics:
1. It can be applied to various working conditions, especially for industries with high dust concentration.
2. The filter bag adopts integrated planning, good sealing performance, convenient installation and replacement, and shortening the stop time.
3. Pleated filter bag is used as the core component for dust removal, which has a compact structure and saves space.
4. It is a solution to replace the traditional bag type dust collector and electric dust collector.
5. The filter bag adopts external filtration for high filtration efficiency.
6. Compared with the filter bag filter, the structure of the pleated filter bag filter is simple, the filtering area is significantly increased, and the filtering area can be increased by about 2.5-3 times, and the filtering efficiency is high.
After the dust-laden gas from the pleated dust bag enters the ash hopper from the air outlet, a part of the coarse dust particles and the condensed dust mass fall directly because of the inertia effect, and play a role of pre-dust collection. The airflow that enters the ash bucket turns up and rushes into the box. When passing through the pulse pleated filter bag, dust is blocked on the outer surface of the filter cartridge. The purified gas enters the clean room on the upper part of the filter bag and is collected by the air outlet pipe for discharge.
When the set value or time is reached, the ash cleaning controller announces the ash cleaning instruction, which will drop the dust on the outside of the filter bag and fall into the ash hopper. The whole process is filtering, pulse ash cleaning, and air blowing. The dust removal of the dust collector is completed by the pulse solenoid valve and the controller. Reasonable dust removal ensures the service life of the filter cartridge. During the operation of the dust collector, with the continuous filtering, the dust accumulation on the surface of the filter bag gradually increases, and the resistance of the dust collector is gradually added.