SU291547A1 - PATENUO-TECHNINE] BATTERY - Google Patents

Description

The invention relates to a technique for the purification of gases and air from suspended in them liquid or solid easily soluble particles.

The proposed filtering material is used for storing self-cleaning mist eliminators or for irrigation filters used to clean gases from liquid particles suspended in them, acids, alkalis, and easily soluble salts. In these filters, the particles captured by the fibers merge, forming films on the fibers and large drops, filling the pores. The accumulated fluid in the layer is removed from it due to aerodynamic drag, gravitational and capillary forces.

Known designs of fibrous absorbers are packed with padded layers or other materials commonly used to clean dry dust from gases.

In these materials, in the course of a gas, very often the layers for the purpose of increasing the dust capacity contain coarser fibers and have a high porosity, and the trailing layers consist of fine fibers and have a low porosity. The latter makes these materials non-flowable for filtering mists due to strong splashes at elevated speeds. The disadvantages of the known materials, from the point of view of use in self-cleaning filters, are also compressibility with increasing pressure drop due to accumulation of fluid, structural incompetence and the absence of special places for removal of trapped liquid, low mechanical strength. All this leads to a large resistance and the emergence of secondary ash from the layer of captured liquid, which reduces the cleaning efficiency. Structure instability during filtration for

a long time at a speed of more than 2 m / s leads to the destruction of the filtering material, especially at high concentrations of mists of liquids with high viscosity (for example, concentrated sulfuric

acid).

The purpose of the proposed filtering material is to achieve a more rigid and stable in time structure of the material, contributing to the removal of trapped liquid.

from the layer and preventing the occurrence of secondary entrainment. These improvements will allow to intensify the discharge of fluid from the layer, to achieve work stability over time, to reduce aerodynamic drag,

to increase the cleaning efficiency and simplify the design of filters due to the elimination of splash traps.

To this end, the filter material is manufactured using the needle-punched method from single-hydrophobic most elastic and chemically STOR1KYh fibers - polypropylene, lavsan and polyvinyl chloride. In this case, from 10 to 15% of the fibers are perpendicular to the layer: they are places where the trapped liquid is removed from the layer and at the same time provide material rigidity to the material and stability of the three-dimensional structure. The material is manufactured in three layers. The inner layer consists of thinner fibers (c / v 10–20 µm) with a porosity of 91–94%, and the frontal and end layers are filled with needles on PEGO of coarser fibers (30–70 µm) with a larger porosity (94–97% ). This reduces the fluid load on the inner layer by trapping large particles in the frontal layer and eliminating the splash hole, since the large fibers and high porosity of the trailing layer ensure trapping of particles from the inner layer and draining the liquid in the form of streams and very large drops falling down. .

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If the basis weight of particles to be cleaned is less than 1 micron in size, filter materials without a coarse fiber frontal layer are used. five

Subject invention

Claims (2)

1. Filtration material for trapping mists, manufactured using synthetic fibers using a needle-punching method, characterized in that, in order to more vigorously remove from the layer of captured liquid without secondary spatter and reduce resistance, it contains from 10 to 15% of fibers located perpendicular to the surface material to its full depth. 2. The material according to claim 1, characterized in that it consists of three layers, with thinner fibers being used for the inner layer with a porosity of 91--94%, and the frontal and trailing layers contain coarse fibers and have a higher porosity (94- 97%).