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What are the advantages of glass fiber filter bags, apply to what occasion
2017/7/13 16:00:03
What is the filter bag?
Durable filter bag with a pure high-quality melt blown ultra-fine fiber filter cloth after a fine hot melt or car every made.
Filter bag filter accuracy is usually nominal filtering accuracy.
The filter bag is a key part of the bag filter operation, usually cylindrical filter bag hanging vertically in the dust collector. Filter bag fabric and design should try to pursue efficient filtration, easy dust stripping and durable effect.
Features In the pulse and air box type pulse dust collector, the dust is attached to the outer surface of the filter bag. Dusty gas through the dust collector, the dust was trapped in the outer surface of the filter bag, and clean gas through the filter into the filter bag inside. The cage inside the bag is used to support the filter bag to prevent the bag from collapsing, and it helps to remove and redistribute the dust.
* Filter cloth is based on the thickness of the filter layer filter, are deep filter
* The depth of the entire filter layer formed by the three-dimensional porous porous structure, from the inside and outside from the loose to the
Dense, forming a gradient filter
* High capacity, long filter life, low pressure difference
Material: PP (polypropylene), PE (polyester), PTFE (polytetrafluoroethylene)
Collar: stainless steel ring, plastic ring.
2. Capillary oil filter bag
From the pre-filter layer, the main filter layer and the screen cover three parts. Is designed for efficient adsorption of grease in liquids
of. Filter material in the porosity of up to 80%, greatly improving the product life. Oil up to the weight of the bag itself 12 to 20 times the specific (due to fluid and grease characteristics, flow rate varies)
3. Absolute precision seamless filter bag
From pure polypropylene capillary hot melt spray molding. The outer layer is thicker deep filter material to provide layered filtration;
Inner large diameter filter, used to further enhance the overall deep filter effect, improve the ability to accommodate impurities. The average life of ordinary polypropylene filter bag more than five times. The maximum filter accuracy is 3um. Collar ring for the plastic ring.
4. Screen filter bag
For the election materials are nylon single wire mesh, polyester single wire mesh, polypropylene multi-wire mesh. Maximum filtration accuracy of 20um
Features: Absolute filter accuracy, high toughness, anti-damage, no fiber free, can be used repeatedly.
Performance of the filter material temperature, strong acid, weak acid, alkali, weak base, grease, aromatic, alcohol ether, organic solution, microbial.
Filtration accuracy: PE / PP / PTFE
0.5, 1, 3, 5, 10, 25, 50, 80, 100, 125, 150, 200, 300, 400, 600, 800, 1000 multi-layer high efficiency filter bag impurity capture is ordinary needle felt 2-3 times the removal efficiency is higher than 90%
Filter bag industry standard
Technical specification for filter and filter bag for bag filter
Technical specification for bag filter for bag filter
Technical specification for identification of bag filter frame for bag filter
HJ / T 327-2006 Technical requirements for environmental protection products Bag filter bag
Glass fiber filter bags
Classification 1, according to the shape of the bag is divided into: flat bags (trapezoidal and flat) and round bags (cylindrical).
2, according to the way into the wind is divided into: down the wind on the wind and the wind into the wind and DC (only flat plate).
3, according to the bag filter is divided into: external filter and filter.
Filter fiber, cotton fiber, wool fiber, synthetic fiber and glass fiber, different fiber woven into the filter with different properties. Commonly used filter media 208 or 901 polyester flannel, the use of the temperature is generally not more than 120 ℃, after the silicone resin treated glass fiber filter bag, the use of temperature is generally not more than 250 ℃, cotton fabric is generally applicable to no corrosive; 80-90 ℃ below the dusty gas.
Use filter with the filter with the use of filters, the use of system fluid pressure, the liquid squeeze through the filter bag to achieve the purpose of filtration. With a fast flow rate, processing capacity, filter bag long life advantages, especially to adapt to large flow to be closed filter occasions.
Self-flow open filter: filter bag through the adapter directly connected with the pipeline, the pressure difference can be used to filter the fluid gravity. Its significant feature is the need for equipment investment, filtration is simple and feasible, especially for small size, multi-species, intermittent economic liquid filtration.
Bag filter is a dry filter device. It is suitable for capturing small, dry, non-fibrous dust. The filter bag is made of textile filter cloth or non-woven felt, and the dusty gas is filtered by the filtering effect of the fiber fabric. When the dust-laden gas enters the bag filter, the particles are larger and larger than the dust, The role of sedimentation down, falling into the ash bucket, containing smaller dust in the filter through the filter, the dust was blocked, so that the gas was purified. Generally the new filter dust removal efficiency is not high enough. Filter material used for some time, due to sieve, collision, retention, diffusion, static and other effects, the bag surface accumulation of a layer of dust, this layer of dust called the primary, in the subsequent movement of the process, the primary Filter the main filter layer, relying on the role of the primary layer, the larger the filter can also get a higher filter efficiency. With the accumulation of dust on the surface of the filter, the efficiency and resistance of the precipitator are correspondingly increased, when the pressure difference on both sides of the filter, it will be attached to some of the filter on the fine dust particles squeezed in the past, So that the efficiency of the precipitator. In addition, the excessive resistance of the dust collector will significantly reduce the air volume of the dust removal system. Therefore, the resistance of the precipitator to a certain value, it is necessary to timely cleaning. Cleaning can not damage the primary layer, so as to avoid the decline in efficiency.
The structure of the bag filter is mainly composed of the upper part, the middle box, the lower box (ash bucket), the cleaning system and the ash discharge mechanism.
Bag filter performance is good or bad, in addition to the correct choice of bag material, the cleaning system on the bag filter plays a decisive role. To this end, cleaning method is to distinguish one of the characteristics of bag filter, bag filter is also an important part of the operation.

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