The high-temperature dust bag is formed by pricking Ni, using a hydrophobic agent and an oleophobic agent through padding, pre-baking and baking. The hydrophobic agent and oleophobic agent are rapidly dried and then attached to the surface of the filter fiber in a net shape, thereby reducing the surface tension of water and oil and the filter bag, so that the wet filter medium formed by water, oil and dust is not It will adhere to the surface of the filter bag, thus avoiding the paste bag phenomenon. High-temperature dust bag During the operation of the bag filter, the dust in the gas contains more moisture and oil, as well as moisture-absorbing and deliquescent dust. On the surface of dust, water film or oil film may be formed to increase adhesion. Helps catch dust, but it will make cleaning difficult. In particular, when the high-temperature gas is in a high-humidity state, dew condensation occurs due to cooling of the outside air. This can not only make the collected dust on the surface of the filter bag foul or even block, but also can corrode the structural material, increase the operating resistance of the filter, and directly affect the normal operation of the bag filter. Ordinary filter media must be further improved in function to suit this special working conditions, prevent or reduce dust bag phenomenon, improve filter media service life and work efficiency.
The fabric and design of the high-temperature dust bag should be as high as possible for efficient filtration, easy removal of dust, and durability. The selection of dust bag is very important. It directly affects the dust removal effect of the dust collector. The dust bag is selected from the following aspects: gas temperature, humidity and chemical properties, particle size, dust concentration, filtration speed, clearance Dust and other factors. In pulse and air box type pulse dust collectors, dust is attached to the outer surface of the filter bag. When the dust gas passes through the dust collector, the dust is trapped on the outer surface of the filter bag, and the clean gas passes through the filter material into the filter bag interior. The cage inside the filter bag is used to support the filter bag to prevent the filter bag from collapsing, and it helps the removal and redistribution of the cake.
1, using dust filter bag filter, dust can not penetrate into the filter, is the surface of the filter, whether coarse or fine dust, all deposited on the surface of the filter material, that is retained by the membrane itself aperture filter material, no initial filter period, start Is an effective filter, nearly 100% of the time in the filter.
2, low pressure, high-flux continuous work. Traditional deep filtration media.
3, dust filter bag is easy to clean, long service life.
4, the surface is not finished high filtration efficiency. Usually industrial filter media is deep filtration. It depends on establishing a dust layer on the surface of the filter material to achieve effective filtration. The establishment of effective filtration time is long, the resistance is large, the efficiency is low, the interception is not complete, the filtration and backflush pressure is high, the cleaning is frequent, the energy consumption is high, the service life is not long, and the equipment covers an area. Dust-removing bag filters are used to prevent dust from penetrating into the filter media. The surface is filtered. No matter if it is coarse or fine dust, it will be deposited on the surface of the filter media. That is, the filter will be retained by the aperture of the membrane itself. No initial filtration period will start. Effective filtration, nearly 100% of the time in the filter.
5, low pressure, continuous flux work. The traditional deep-filtering filter, once put into use, the dust penetrates, establish a dust layer, the permeability will drop rapidly. During filtration, dust accumulates on the inside and causes obstruction, which increases the resistance of the dust removal equipment. The membrane filter material has a fine pore size and its lower viscosity, so that the dust penetration rate is close to zero, and it is put into use to provide the best filtration efficiency. When the filtered material deposited on the surface of the membrane filter material reaches a certain thickness, it will It is automatically detached, easy to remove ash, so that the filtration pressure is always kept at a very low level, and the air flow is always kept at a high level and can be continuously operated.
Precautions when working with high temperature dust bags:
1. Dust bag Polyester, polypropylene, vinylon are identified by relevant health departments and used in food, pharmaceutical and other industries without side effects on human health.
2. When the dust bag is cut, it is best to use hot iron for cutting, which can prevent looseness of the latitude and longitude lines. The sewing thread must use the same line of performance.
3. The food and pharmaceutical industries should use warm water before using the dust bag to prevent the dirt on the fabric from entering. (Chong) washing, the cloth body can be softened, the hydrophobicity and air permeability of the filter cloth can be restored, and the filter cloth usage rate can be increased.
4, can produce special specifications of the product. If the fabric width can be increased or decreased, the size of the dust bag can be arbitrarily selected, but please inform the first half to 1 month so that the product can be planned for production.