CN201399289Y - Aramid fiber gradient high-temperature resisting woven filter felt - Google Patents

Abstract

The utility model provides an aramid fiber gradient high-temperature resisting woven filter felt, which adopts a laminated structure, wherein, an aramid fiber layer and an aramid composite fiber layerare glued to the upper and the lower surfaces of an aramid fiber woven cloth respectively, and an aramid fine fiber layer is further glued to the upper surface of the aramid fiber layer. The utilitymodel has the advantages that the filter felt is high-temperature resistant and achieves normal functions at the temperature of 204 DEG C and remains serviceable at the instantaneous temperature of 240 DEG C; due to the fact that the aperture structures of the product vary in gradient, the filter felt achieves high filter efficiency and runs with low resistance, helped by combined filtering efforts by the surface layer and layers thereunder; and the product enjoys a long service life.

Description

The high temperature resistant needled filtering felt of aramid fiber ladder degree

Technical field

The utility model relates to a kind of filter felt, the high temperature resistant needled filtering felt of particularly a kind of aramid fiber ladder degree.

Background technology

Be used for the filter felt of the high temperature resistant occasion of steel plant's blast furnace gas and flue gas, cement plant tail gas, pitch stirring flue gas at present, its resistance to elevated temperatures is poor, and service life is short.

The utility model content

The utility model is to provide a kind of resistance to elevated temperatures good, the high temperature resistant needled filtering felt of aramid fiber ladder degree of long service life.

In order to solve above technical problem, the utility model provides a kind of aramid fiber ladder degree high temperature resistant needled filtering felt, this filter felt is a layer structure, paste aramid fiber layer, aramid fiber mixed fiber layer respectively on the upper and lower surface of the woven cloth of aramid fiber, paste an aramid fiber fine fiber layer again at the upper surface of aramid fiber layer.

Described aramid fiber mixed fiber layer is that diameter is that aramid fiber and the diameter of 2.0mm is the fibrage of aramid fiber to mix at 3: 2 of 1.7mm.

The specification of described aramid fiber layer is 1.7D * 51mm, and wherein D is a diameter.

The specification of described aramid fiber fine fiber layer is 1.5D * 51mm, and wherein D is a diameter.

Superior effect of the present utility model is:

1) high temperature resistant, serviceability temperature is 204 ℃, moment serviceability temperature be 240 ℃;

2) the product aperture structure becomes graded, realizes top layer and deep layer combined filtering, the filter efficiency height, and running resistance is low;

3) long product lifecycle.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

The number in the figure explanation

The woven cloth of 1-aramid fiber; 2-aramid fiber layer;

3-aramid fiber fine fiber layer; 4-aramid fiber mixed fiber layer.

The specific embodiment

See also shown in the accompanying drawing, the utility model will be further described.

As shown in Figure 1, the utility model provides a kind of aramid fiber ladder degree high temperature resistant needled filtering felt, this filter felt is a layer structure, paste aramid fiber layer 2, aramid fiber mixed fiber layer 4 respectively on the upper and lower surface of the woven cloth 1 of aramid fiber, paste an aramid fiber fine fiber layer 3 again at the upper surface of aramid fiber layer 2.

Described aramid fiber mixed fiber layer 4 is that diameter is that aramid fiber and the diameter of 2.0mm is the fibrage of aramid fiber to mix at 3: 2 of 1.7mm.

The specification of described aramid fiber layer 2 is 1.7D * 51mm, and wherein D is a diameter.

The specification of described aramid fiber fine fiber layer 3 is 1.5D * 51mm, and wherein D is a diameter.

The utility model is widely used in the high temperature resistant occasion that steel plant's blast furnace gas and flue gas, cement plant tail gas, pitch stir flue gas etc.

The utility model drops in steel plant's blast furnace gas on probation, and through experiment confirm, long-term serviceability temperature is 204 ℃, moment serviceability temperature be 240 ℃, the Physical Mechanical energy range is: brute force 〉=900N/5 * 20cm radially, broadwise brute force 〉=1200N/5 * 20cm; Radial fragmentation percentage elongation≤25%, broadwise elongation at break≤45%; Air permeability is 10m ³/ m ².min.

Claims (2)

1, the high temperature resistant needled filtering felt of a kind of aramid fiber ladder degree is characterized in that:

This filter felt is a layer structure, pastes aramid fiber layer, aramid fiber mixed fiber layer respectively on the upper and lower surface of the woven cloth of aramid fiber, pastes an aramid fiber fine fiber layer again at the upper surface of aramid fiber layer.

2, by the high temperature resistant needled filtering felt of the described aramid fiber ladder of claim 1 degree, it is characterized in that:

Described aramid fiber mixed fiber layer is that diameter is that aramid fiber and the diameter of 2.0mm is the fibrage of aramid fiber to mix at 3: 2 of 1.7mm.