Gradient fiber nonwoven fabric and spinning equipment and production method thereof

Abstract

The invention belongs to the field of non-woven fabrics, in particular to a gradient fiber non-woven fabric and a spinning device and a manufacturing method thereof, comprising a thick long fiber layer and a thin long fiber layer. The fiber diameter of the long fiber layer is 13 μm-17 μm, the weight of the thick long fiber layer per square meter is 100g-150g, and the weight of the fibers of the slender fiber layer per square meter is 100g-150g. The pressure difference of the invention is small, and it is applied to the dust removal industry. 1. The invention has high air permeability, and the dust removal equipment is easier to blow back and clean the dust, so it is more durable, and the service life of the filter cartridge is increased by more than 30%; 2. The motor consumption of the dust removal equipment 3. The filtration efficiency can reach 99.5%. According to the emission test of the iron and steel plant, the emission concentration of all the dust in the iron and steel plant is 3mg-5mg per cubic meter, which is far lower than the national average per cubic meter. Meter 10mg emission standard, energy saving and emission reduction.

Description

technical field [0001] The invention belongs to the field of non-woven fabrics, in particular to a gradient fiber non-woven fabric and a spinning device and a manufacturing method thereof. Background technique [0002] The non-woven fabric is made of fibers, and the specification of the non-woven fabric for air and water filtration is 260g / m 2 , the fiber diameter of non-woven fabrics on the market is 16μm-18μm, such as non-woven fabrics imported from Japan, the fiber diameter is generally 16μm, the pressure difference of the non-woven fabric is 60pa-70pa, and the pressure difference when the surface is covered is 250pa; The problem is that when applied to industrial dust removal equipment, due to the large pressure difference of the non-woven fabric and insufficient air permeability, the dust captured by the non-woven fabric is difficult to be completely cleaned by backflushing, and the surface of the non-woven fabric is easy to coat. If it is blown and broken, the longer ...

AI Technical Summary

Problems solved by technology

[0002] The non-woven fabric is composed of fibers, and the specification of the non-woven fabric for air and water filtration is 260g / m 2 , The fiber diameter of non-woven fabrics on the market is 16μm-18μm, such as non-woven fabrics imported from Japan, the fiber diameter is generally 16μm, the pressure difference of non-woven fabrics is 60pa-70pa, and the pressure difference is 250pa when the surface is covered with a film; The problem is that when it is used in industrial dust removal equipment, due to the large pressure difference and insufficient air permeability of the non-woven fabric, the dust captured by the non-woven fabric is difficult to be completely blown back and cleaned, and the surface of the non-woven fabric is easily coated. If it is blown out, the longer it is used, the more dust will accumulate on the non-woven fabric, which will lead to an increase in the energy consumption of the motor of the dust removal equipment. In order to reduce energy consumption, it is necessary to replace the filter cartridge of the dust removal equipment regularly, which will increase the cost. , especially steel plants or cement plants, etc., need to work continuously for a long time, and the replacement of filter cartridges is more frequent, which not only costs high, but also causes great waste

[0003] The invention patent titled "Spunbond Nonwoven Fabric for Filters and Its Manufacturing Method" and patent number "201680074618.X" discloses a nonwoven fabric for filters, which is composed of composite polyester fibers. The existing problems are , when the diameter of the composite polyester fiber is smaller, such as a diameter of 16 μm, its filtration accuracy is high, but the air permeability is small, because the smaller the diameter, the denser the structure, resulting in a larger pressure difference in the non-woven fabric; when the composite polyester fiber When the diameter of the fiber is larger, the problem of insufficient air permeability can be solved, but the filtration accuracy cannot meet the requirements

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