KR100749538B1 - Pellet fiber filter element having steric air gap conformation and liquidity - Google Patents

Abstract

A pellet type fiber filter medium having steric pore structure and fluidity, which has a higher porosity, increases the filtering amount, has the substantially excellent collecting function, is easily applied to various types of filtering devices, simply performs the backwashing process, and reduces the backwashing time and the backwashing water amount substantially as compared with other filter mediums, is provided. In a non-woven fabric type fiber filter medium(100) for removing impurities including suspended solids, a pellet type fiber filter medium having steric pore structure and fluidity is characterized in that fluidity is given to the fiber medium by mixing at least two different types yarns to form a web, needle-punching the web through barbs to form a fabric with steric pore structure, applying heat with a temperature of 90 to 160 deg.C to the fabric to subject the fabric to thermal fusion, and cutting the thermal fusion performed fabric in the form of pellets with predetermined shape. The at least two different types yarns are comprised of a first yarn(30) composing the fiber filter medium after thermal fusion, and a second yarn(40) which is molten into a liquid phase and fused with the first yarn by heating.

Description

Pellet-type fiber media with three-dimensional pore structure and fluidity {PELLET FIBER FILTER ELEMENT HAVING STERIC AIR GAP CONFORMATION AND LIQUIDITY}

1 is a view showing a fibrous media in the form of a hexahedron according to an embodiment of the present invention.

2 is a view showing a fibrous media in the form of a pentagon according to another embodiment of the present invention.

3 is a view showing a web forming process of the fibrous material according to the present invention.

4 is a view showing a web formed in a single layer structure.

5 is a view showing a web formed in a three-layer structure.

6 is a view showing a needle punching process of the fibrous material according to the present invention.

7 shows a barb according to the invention.

<Description of the symbols for the main parts of the drawings>

10: compaction roll 20: barb

21: projection 30: first yarn

40: second yarn 100: textile media

The present invention relates to a fibrous material for filtering impurities such as suspended solids and cohesive microflocs, and more particularly, three-dimensional void structure is formed by needle punching and heat-sealing a web formed by blending two or more different yarns through barbs. Compared to other filter media, it has higher porosity, the amount of filtration treatment is increased, the collection function is remarkably excellent, and the shape is formed in the form of pellet, so it is easy to apply to various types of filtration devices and the backwashing process is easy. The present invention relates to a wetted fiber media having a three-dimensional pore structure and fluidity in which backwashing time and backwashing amount are excellently reduced.

In general, the filtration process is a process of introducing raw water containing suspended solids into the filtration apparatus to discharge clean treated water from which suspended solids (SS) have been removed, and separating the suspended solids from the raw water into the pores in the filtration layer of the filtration apparatus. The process of detaining and capturing by complex mechanisms such as sedimentation, inertia collision, blocking, adsorption, and coagulation, and discharging only clean water as treated water. If the filtration process is continued, the pores in the filtration layer gradually become cohesive microflocs or suspended solids. And the filtration resistance is increased to reach a state in which the filtration process can no longer be continued. At this time, a cleaning process is required to exclude suspended solids trapped in the pores by injecting clean washing water and air.

The suspended solids (SS) are indicative of the quality of contaminated water and are also called suspended solids.

Organic and inorganic solids are suspended in urban sewage and factory wastewater, and when discharged into natural waters such as rivers, lakes, and seas, the turbidity of the water is increased and the appearance is polluted, among which biodegradable organic substances are dissolved oxygen ( Pollution of natural water quality, such as reducing

On the other hand, the filtration process of the suspended solids for the continuous water flow requiring a large amount of water treatment (filtration of effluent water) is classified into a cross-flow continuous gravity and downflow continuous gravity or downflow continuous pressure type according to the flow of the water flow.

The cross-flow continuous gravity type is attached to an Aqua Disk Filter (American type) and variable low speed continuous rotating center drum that infiltrate raw water into tank or water tank by low pressure head type by gravity using carpet type fiber filtration cloth. There is a micro disk filter (Swedish) in which raw water is filtered through raw water from the inside to the outside.

In the case of the cross-flow continuous gravity type, the water quality is excellent and the installation space is small, the required area of the site is small, and the equipment is manufactured for each unit, making it easy to maintain, but it is difficult to cope with individual equipment due to inflow water quality and flow rate fluctuation. Increasing the number of revolutions of the rotating drum or reducing the frequency of cleaning the disk increases the filtration efficiency but reduces the processing capacity.It also reduces the life due to the damage of the filter element due to high pressure during the cleaning of each disk. There are drawbacks such as stopping the test drive and requiring the entire drainage.

The continuous downflow type gravity feeds the raw water to the top of the filter bed, and passes through the filter bed downward, and then there is a gravity filter (American style, French style) which flows out to the lower water collecting device, wherein the filter bed is mainly composed of sand. The life span of the media is about 5 years.

The gravity filter has the advantage that it is possible to filter by natural oil due to the low head loss without filter blockage caused by mud ball, etc., but the required area is very large, and the initial investment cost is high, The growth of algae and backwashing water increase due to the large amount of backwash water, which affects the return load. Above all, the capacity of the medium (sand) is very cumbersome, so it is very cumbersome to change, the operation must be stopped and the filtration tank must be drained for the cleaning of the filter. The point is pointed out.

Therefore, the research and development of a new filter medium which can be used for the filtration of large-scale continuous water streams, that is, effluent water, and which can effectively filter cohesive fine flocs or suspended solids in water still has a problem to be improved.

The present invention has been made to solve the above problems, the three-dimensional pore structure is formed by needle punching and heat-sealing a web formed by blending two or more different yarns through the barb has a higher porosity than other filter media, It is increased and the collection function is remarkably excellent, and the shape is formed in the form of pellets, so that it is easy to apply to various types of filtration devices, the backwashing process is simple, and the backwashing time and the amount of backwashing are excellently reduced. It is an object of the present invention to provide a wet-type fiber media having a pore structure and fluidity.

The present invention has the following features to achieve the above object.

The present invention relates to a nonwoven fibrous media for removing cohesive fine floc and suspended solids in sewage, wastewater and water treatment processes.

The fibrous media is needle-punched a web formed by blending two or more different yarns through a barb to form a fabric having a three-dimensional pore structure, and then heat-sealed by applying a temperature of 90 ° C. to 160 ° C. to have a pellet of a predetermined shape. To give fluidity.

Here, the two or more different yarns are composed of a first yarn constituting the fibrous media after heat fusion, and a second yarn fused with the first yarn by melting in a liquid phase by heating, wherein the blended yarn is a first yarn The second yarn and the first yarn are sequentially stacked on the top surface and blended.

In addition, the fibrous media is divided into a sedimentation type that is precipitated when introduced into water and an intermediate type that flows in a uniform distribution with the floating flotation and water, depending on the type of yarn selected. 1 yarn, low melting polyester as 2nd yarn, middle type polyester as 1st yarn, polypropylene or polyethylene as 2nd yarn and floating type polypropylene as 1st yarn, polyethylene 2nd Adopt as yarn.

In addition, the barb is formed with a plurality of triangular projections are arranged spaced apart at a certain distance on the outer periphery to increase the three-dimensional void structure, the pellet shape is preferably a pentagonal or hexahedron.

Hereinafter, the fiber media according to the present invention will be described in detail with the accompanying drawings.

1 is a view showing a fibrous media in the form of a hexahedron according to an embodiment of the present invention, Figure 2 is a view showing a fibrous media in the form of a pentagon according to another embodiment of the present invention, Figure 3 is a fiber according to the present invention It is a figure which shows the web formation process of a media, FIG. 4 is a figure which shows the web formed in single layer structure, and FIG. 5 is a figure which shows the web formed in three layer structure.

6 is a view showing a needle punching process of the fiber media according to the present invention, Figure 7 is a view showing a barb according to the present invention.

Referring to the drawings, the fibrous media 100 according to the present invention is formed by blending two or more different yarns into needle-punched webs through a barb 20 to form a woven fabric having a three-dimensional pore structure. It is cut and configured to have a pellet shape of a certain shape by applying heat to heat fusion.

Here, two or more different yarns constituting the fibrous media 100 are divided into a first yarn 30 and a second yarn 40, wherein the first yarn 30 constitutes a fibrous media after heat fusion. To maintain the function.

The first yarn 30 may be adopted differently depending on the sedimentation type, flotation type, intermediate type, and polyester, polypropylene, and the like.

In addition, the second yarn 40 is deformed into a liquid phase by heating and is fused with the first yarn 30 so as to prevent deformation of the fibrous media or separation between the yarns, and the like. Low melting polyester, polyethylene, polypropylene And the like.

Each of the first yarn 30 and the second yarn 40 may be made of one kind of yarn, and of course, may be made of a first kind of yarn 30 or a second kind of yarn 40. Can be.

In addition, in forming the web by blending the yarn, the first yarn 30 and the second yarn 40 may be mixed with each other in a single layer, and then the web may be formed through the compaction roll 10. The web may be formed through the compaction roll 10 in a three-layer structure in which the second yarn 40 and the first yarn 30 are sequentially stacked on the substrate 30.

In the case of such a three-layered yarn, the yarn is mixed evenly by needle punching through the barb 20, and the uniform distribution of the three-dimensional pore structure is possible, which is more preferable as a fibrous material.

On the other hand, after the web is mixed to form a needle punched through the barb 20 to evenly mix the two or more types of yarn to have a three-dimensional pore structure at the same time.

In order to further increase the three-dimensional air gap structure, the shape of the barb 20 is preferably formed of a triangular pyramid-like protrusion 21 disposed at a predetermined interval on the outer edge of the cylindrical rod.

"형상으로 형성됨이 보다 바람직하며, 이에 따라 다짐롤(10)에 의해 웹이 형성된 직물을 일정부분 관통하여 직선왕복운동하는 바브(20)에 의해 본 발명에 따른 섬유여재(100)는 보다 균일하고 공극체적이 큰 구조 를 가지게 된다.The projection 21 has a cross section "

"It is more preferable to be formed in a shape, and accordingly the fiber media 100 according to the present invention by the barb 20 to linearly reciprocate through a portion of the web formed by the compaction roll 10 is more uniform and The void volume has a large structure.

As these uniform, large-volume pores are formed, suspended solids and cohesive fine flocs can be more efficiently filtered.

Meanwhile, the needle punched fabric is heat-treated by performing this process, and as described above, the heat-treatment process is performed by heat fusion between the second yarn 40 and the first cost by heating above the melting temperature of the second yarn 40.

Heating means for performing such a heat treatment process may be an electric heater, steam, hot air blower, etc. The present invention is not limited thereto.

In addition, the preferred heating temperature may vary depending on the adoption of the first yarn 30 and the second yarn 40, the melting temperature of the first yarn 30 should be higher than the melting temperature of the second yarn 40 Of course.

Fabrics subjected to such a heat treatment process are cut into pellets to impart fluidity. In order to further increase the function of the fibrous media 100, the pellet form is most important.

Preferred pellet forms include pentahedron and hexahedron, in the case of pentahedron and hexahedron, the fibrous media 100 closely adheres to each other and forms and maintains a stable layer of media as it enters into the fluid. Filtration is further improved.

In addition, during backwashing, each of the fibrous media is flowed, so that backwashing is quick and easy.

On the other hand, one of the great features of the present invention is that the fiber media according to the present invention can be applied to all types of filtration according to the adoption of the type of yarn.

Such fibrous media 100 can be divided into sedimentary, intermediate, and flotation depending on the type of yarn to be adopted. These three types of fibrous media 100 are larger and smaller as compared to the specific gravity of water. It is divided into upstream filtration, downflow filtration and crossflow filtration respectively.

Floating type filtrate is used for upflow filtration, precipitation type filtrate is used for downflow filtration, and intermediate type filtrate is used for lateral flow filtering.

Precipitated fibrous media has a specific gravity of 1.1 to 1.3 in the sediment in the water, the yarn adopted to implement this is a polyester in the case of the first yarn 30, a low melting point poly in the case of the second yarn (40) It is preferable that it is ester, and it is preferable that a mixing ratio is 3: 7-7: 3.

In addition, the preferred heating temperature for performing the heat treatment process of the precipitation-type fibrous media is 120 ℃ to 160 ℃.

Meanwhile, the intermediate fiber media has a specific gravity of 0.9 to 1.1 and flows with water in water. As the yarn for realizing this, the first yarn 30 is polyester, and the second yarn 40 is polypropylene. Or polyethylene, and the mixing ratio is preferably 3: 7 to 7: 3.

In addition, the preferred heating temperature for performing the heat treatment process of the intermediate fiber media is 100 ℃ to 140 ℃.

Floating fibrous media has a specific gravity of 0.7 to 0.9 and is floated in the water. The yarn for realizing this is polypropylene in the case of the first yarn 30 and polyethylene in the case of the second yarn 40. Preferably, the mixing ratio is preferably 3: 7 to 7: 3, and the heat treatment heating temperature is preferably 90 ° C to 130 ° C.

As described above, the fiber filter according to the present invention has a higher porosity than other filter media, so that the amount of filtration treatment is increased and the collection function is remarkably excellent, and it is easy to install in a desired filter device, It has the effect of reducing the amount of backwashing water.

In addition, it is applicable to any filtration method, easy to replace and manage, the pellet shape is formed into a pentagonal or hexahedral to form a stable filter layer during filtration and backwashing efficiency is improved while each filter medium flows during backwashing.

Claims (6)

In non-woven fibrous media for removing impurities including suspended solids, The fibrous media is needle-punched a web formed by blending two or more different yarns through a barb to form a fabric having a three-dimensional pore structure, and then heat-sealed by applying a temperature of 90 ° C. to 160 ° C. to have a pellet of a predetermined shape. Pellet-type fibrous media having a three-dimensional pore structure and fluidity, characterized in that the fluidity is given by cutting so that. The method of claim 1, The two or more different yarns have a three-dimensional pore structure and fluidity, comprising a first yarn constituting the fibrous media after heat fusion and a second yarn fused in the liquid phase by heating and fusion with the first yarn. Pellet-type fibrous media. The method of claim 2, The blended yarn is a pellet-type fibrous media having a three-dimensional pore structure and fluidity, characterized in that the second yarn, the first yarn is sequentially laminated on the first yarn mixed. The method of claim 2, The fibrous media is divided into a sedimentation type that is precipitated when introduced into water and an intermediate type that flows in a uniform distribution with the floating flotation and water, depending on the type of yarn selected. The precipitation type is polyester as the first yarn, the low melting point polyester as the second yarn, the middle type is polyester as the first yarn, polypropylene or polyethylene as the second yarn, and the floating type is made of polypropylene. A pellet-like fibrous media having a three-dimensional pore structure and fluidity, characterized in that one yarn is polyethylene as a second yarn. The method of claim 1, The barb has a three-dimensional pore structure and fluidity of the pellet-type fibrous media, characterized in that the projections having a plurality of triangular phases are arranged spaced at a predetermined distance on the outer edge in order to increase the three-dimensional pore structure. The method of claim 1, The pellet-like shape of the pellet-type fibrous media having a three-dimensional pore structure and fluidity, characterized in that the pentagonal or hexahedron.

Images