High-temperature resistant dust bag

High temperature dusting bag: the so-called high temperature dusting bag, refers to the working temperature ≥ 200 ℃ working conditions, the working temperature can reach 300 ℃, including: Metas dusting bag, fluoromax dusting bag, PPS dusting bag, glass fibre needle punched felt dusting bag, P84 dusting bag. High-temperature dust bag can also add conductive yarn, with the function of high-temperature dust bag relative to the medium temperature and room temperature bag, the price is relatively high, and has a high temperature bag price High, our high-temperature bag warranty period of 12 months after the factory, the price according to the customer to provide the diameter and length of the dust bag.

Dust bag is called the heart of the bag filter, generally known as filter dust bag, dust filter bag, dust collection bag, dust bag, dust bag, dust bag, dust collector bag and so on. Dust bag is the key part in the operation of bag filter, usually cylindrical filter bag hangs vertically in the dust collector.

High temperature dust bag or dust removal equipment is the equipment that separates the dust from the flue gas. Bag filter, also known as filter dust collector, is a dry dust collector, it is the use of fibre fabric made of bag filter elements to capture solid particles in the dusty gas dust removal device. The principle of action is that the dust particles around the filter fabric fibres due to inertial force and fibre collision and interception.

High-temperature dust bag fabric and design should try to pursue filtration, easy dust stripping and effect. The selection of dust bag is crucial, it directly affects the dust removal effect of the dust collector, the selection of dust bag from the following aspects: gas temperature, humidity and chemical, particle size, dust concentration, filtering wind speed, dust removal method and other factors.

Characteristics

The fabric and design of the filter bag should be pursued as much as possible Filtration, easy dust stripping and effect.

1. Capillary fibre oil-absorbing filter bag consists of three parts: pre-filter layer, main filter layer and screen cover. It is specially designed for adsorbing oil and grease in liquid. The void ratio in the filter material is as high as 80%, which improves the service life of the product. The oil adsorption capacity can be as high as 12~20 times of the weight of the filter bag itself (depending on the characteristics of the fluid and grease, and the flow rate).

2. Precision seamless filter bag is made of pure polypropylene capillary fibre by hot melt spraying. The outer layer is thickened with deep filter material to provide layered filtration; the inner set of large-diameter filter element is used to further enhance the overall deep filtration effect and increase the capacity of holding impurities. The average service life is more than five times that of ordinary polypropylene filter bags. The filtration precision is 3um, and the collar is plastic.

3. Wire mesh filter bag The available materials are nylon monofilament mesh, polyester monofilament mesh, polypropylene multi-stranded wire mesh. Filtering precision 20um Characteristics: Filtering precision, anti-destruction, no fibre free, can be used repeatedly.

Working Principle

Dust bag is a kind of dry dust removal device, which is suitable for collecting fine, dry non-fibrous dust. The filter bag is made of textile filter cloth or non-textile felt, using the filtering effect of fibre fabrics to filter the dusty gas, when the dusty gas enters the bag filter, the particles of large, large dust, due to the effect of gravity, fall into the dust hopper, the gas containing fine dust is blocked when it passes through the filter media, so that the gas is purified.

Generally the dust removal efficiency of new filter media is not high enough. After a period of time after the use of filter media, due to screening, collision, retention, diffusion, electrostatic effects, the surface of the filter bag has accumulated a layer of dust, this layer of dust is called the initial layer, in the subsequent movement process, the initial layer of the filter media has become the main filtration layer, relying on the role of the initial layer of the filter media with larger holes to obtain a higher filtration efficiency. With the accumulation of dust on the surface of the filter media, the efficiency and resistance of the dust collector are increased accordingly, when the pressure difference between the two sides of the filter media is very large, some of the fine dust particles that have been attached to the filter media will be squeezed through, so that the efficiency of the dust collector decreases. In addition, the dust collector resistance is too high will make the air volume of the dust collector system drop significantly. Therefore, when the resistance of dust collector reaches the value, it is necessary to clear the dust in time. When clearing the dust, the initial layer should not be destroyed, so as not to reduce the efficiency.

The structure of dust bag mainly consists of upper box, middle box, lower box (ash hopper), ash cleaning system and ash discharge mechanism and other parts. The performance of the bag filter is good or bad, in addition to the correct choice of filter bag material, the ash cleaning system plays a decisive role in the bag filter. For this reason, the method of ash removal is one of the characteristics that distinguish the bag filter, and it is also an important link in the operation of the bag filter.