CN204582764U - A kind of dust removal and filtration cloth - Google Patents

Abstract

The utility model discloses a kind of dust removal and filtration cloth, this dust removal and filtration cloth comprises nonwoven substrate layer and is bonded in the nanofiber rete on nonwoven substrate layer surface, be provided with S shape through hole in nonwoven substrate layer, one end of this through hole connects nanofiber rete.This dust removal and filtration cloth has the advantage of efficient low-resistance, effectively can improve efficiency of dust collection, and resistance is little.Especially be provided with cavity between nonwoven substrate layer and nanofiber rete, this cavity is communicated with S shape through hole.Cavity is arranged between nonwoven substrate layer and nanofiber rete, can deposit the dust sunk in S shape through hole, avoids dust to block S shape through hole.This is conducive to improving efficiency of dust collection equally.

Description

A dust filter cloth

technical field

The utility model relates to a dust removal device, in particular to a dust removal filter cloth.

Background technique

At present, the types of dust removal filter cloths in the industry include weaving, needle punching, spunlace, spunbond, and melt blown. Generally speaking, the filtration efficiency of woven fabrics is lower than that of nonwoven fabrics. Filtration efficiency can reach below 30mg/m3 discharge concentration, but when the discharge concentration is required to be 5-10mg/m3, it cannot meet the requirements. Especially for filtering out inhalable particulate matter below PM10-PM2.5, it cannot meet the requirements for use. How to make filter materials achieve higher dust removal efficiency under the condition of lower running resistance has always been the ultimate goal that people strive for. People have used many methods to try to achieve this goal step by step. One is to increase the filtration area and reduce the filtration wind speed. Practice has proved that this method has obvious effects, but due to factors such as investment costs, operating material costs, and site space constraints, etc. , has not been effectively adopted and used. The second is to try to use finer diameter fiber raw materials and finish the surface of the filter material. At present, this method is widely used, but in the actual production process, due to the cost of ultrafine fibers and the limitations of equipment and technology, the production and There are many irrationalities in the application, and the filter material cannot truly achieve the characteristics of high efficiency and low resistance. In industrial flue gas filtration, in order to increase the filtration efficiency, the commonly used measures are: 1. Increase the weight of the filter cloth and improve the density of the filter material, or cover the surface of the ordinary non-woven fabric with a layer

PTFE microporous membrane, due to the increase in weight or density, objectively speaking, the filtration efficiency of the filter material has been improved, but the resistance has also increased, and the energy consumption has increased a lot. Its filtration accuracy is comparable to that of uncoated membranes. Compared with that, due to the significantly smaller pore size, the dust removal efficiency exceeds an order of magnitude, and the emission concentration of industrial smoke is reduced from 30-50mg/m3 to about 5-10mg/m3. However, as the pores become smaller, the resistance of the filter material also increases by an order of magnitude, and the initial resistance is more than 2.6 times that of the uncoated filter material. In addition, PTFE coating and woven or other non-woven filter cloth are bonded by dispensing glue and thermal method. These two methods block the pores of filter cloth fibers to a large extent, which also increases the production process itself. filter resistance.

Contents of the invention

Technical problem: The technical problem to be solved by this utility model is: to provide a dust removal filter cloth, which has the advantages of high efficiency and low resistance, can effectively improve the dust removal efficiency, and has small resistance.

Technical solution: In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is as follows:

A kind of dust removal filter cloth, this dust removal filter cloth comprises nonwoven fabric substrate layer and the nanofiber film layer that is bonded on the surface of nonwoven fabric substrate layer, is provided with S-shaped through hole in the nonwoven fabric substrate layer, and this through One end of the hole is connected to the nanofiber membrane layer.

Further: the S-shaped through holes are arranged in an array in the nonwoven fabric substrate layer.

Further: a cavity is provided between the nonwoven fabric substrate layer and the nanofiber film layer, and the cavity communicates with the S-shaped through hole.

Beneficial effects: Compared with the prior art, the utility model has the following beneficial effects: the above-mentioned dust removal filter cloth uses a nanofiber membrane with small diameter, large specific surface area, small pore size, high porosity, and surface pore distribution Uniform, compared with increasing the filtration efficiency by increasing the weight and density or using PTFE film, etc., it has certain advantages in terms of material cost, initial resistance, running resistance and dust removal efficiency, and truly achieves high filtration efficiency and high filtration efficiency. Features of low resistance. At the same time, an S-shaped through hole is provided in the nonwoven fabric base material. For the dust passing through the nanofiber film layer, it enters the through hole. Since the through hole is curved in an S shape, the dust hits a wall and decelerates when it advances in the through hole until it sinks. This also improves the dust removal efficiency of the dust filter cloth. At the same time, S-shaped through-holes are arranged in the non-woven fabric base material, which also improves the circulation speed of the gas. In addition, a cavity is provided between the nonwoven fabric substrate layer and the nanofiber film layer, and the cavity communicates with the S-shaped through hole. The cavity can store the dust that sinks in the S-shaped through hole, so as to prevent the dust from blocking the S-shaped through hole. This is also conducive to improving the dust removal efficiency.

Description of drawings

Fig. 1 is a kind of structure sectional view of the utility model.

Fig. 2 is another structural sectional view of the utility model.

In the figure: nonwoven fabric substrate layer 1, nanofiber film layer 2, through hole 3, cavity 4.

Detailed ways

The specific content of the utility model is described in detail below through specific embodiments.

As shown in Figure 1, a kind of dedusting filter cloth of the present utility model comprises nonwoven fabric substrate layer 1 and the nanofiber film layer 2 that is bonded on the surface of nonwoven fabric substrate layer 1, nonwoven fabric substrate layer 1 An S-shaped through hole 3 is provided in the middle, and one end of the through hole is connected to the nanofiber membrane layer 2 .

In a specific application, the nonwoven fabric substrate layer 1 can be made of PET, PP, PA, or PPS, or a combination of several of them through spinning. For the dust removal filter cloth with the above structure, the dust removal surface uses a nanofiber membrane with small diameter, large specific surface area, small pore size, high porosity, and uniform distribution of surface pores. Compared with increasing the weight and density or using PTFE film, etc. The method to improve the filtration efficiency has certain advantages in terms of material cost, initial resistance, running resistance and dust removal efficiency, and truly realizes the characteristics of high filtration efficiency and low filtration resistance. At the same time, an S-shaped through hole 3 is provided in the nonwoven fabric substrate 1 , and one end of the through hole is connected to the nanofiber film layer 2 . For the dust passing through the nanofiber membrane layer 2, it enters the through hole 3, and since the through hole 3 is curved in an S shape, the dust hits a wall and decelerates while advancing in the through hole 3 until it sinks. This also improves the dust removal efficiency of the dust filter cloth. Simultaneously, the S-shaped through-hole 3 is provided in the non-woven fabric base material 1, which also improves the circulation speed of the gas.

Further: the S-shaped through-holes 3 are arranged in a row in the non-woven fabric substrate layer 1 . A plurality of S-shaped through-holes 3 are arranged in the non-woven fabric base material layer 1, and the S-shaped through-holes 3 are neatly arranged, which is beneficial to increase the velocity of the airflow and the uniformity of the velocity of the airflow.

Further: as shown in FIG. 2 , a cavity 4 is provided between the nonwoven fabric substrate layer 1 and the nanofiber film layer 2 , and the cavity 4 communicates with the S-shaped through hole 3 . The cavity 4 is arranged between the nonwoven fabric substrate layer 1 and the nanofiber film layer 2, and can store the dust that sinks in the S-shaped through hole 3, so as to prevent the dust from blocking the S-shaped through hole 3. This is also conducive to improving the dust removal efficiency.

The above is only the preferred technical solution of the present utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present utility model.

Claims (3)

1. A dust removal filter cloth, characterized in that: the dust removal filter cloth includes a non-woven fabric base layer (1) and a nanofiber film layer (2) bonded to the surface of the non-woven fabric base material layer (1). An S-shaped through hole (3) is arranged in the woven cloth base material (1), and one end of the through hole is connected to the nanofiber film layer (2). 2. The dust-removing filter cloth according to claim 1, characterized in that: the S-shaped through holes (3) are arranged in an array in the non-woven fabric base material layer (1). 3. The dust-removing filter cloth according to claim 1, characterized in that: a cavity (4) is provided between the non-woven fabric substrate layer (1) and the nanofiber film layer (2), and the cavity (4) communicate with the S-shaped through hole (3).