JP2597300Y2 - Air purifying filter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter for collecting and purifying a gas containing oil mist, fume, dust and the like.

[0002]

2. Description of the Related Art Various materials are used as filter materials for air filters.
Non-woven fabrics of high quality fibers are known,
Heat-sealed non-woven fabric composed of non-woven fibers
A known bag filter is also known (Japanese Patent Laid-Open No. 49-10 / 1979).
No. 1967), mainly for dust in the air.
Used to remove oil mist, fume, etc.
Had been disqualified. The reason is that polypropylene is lipophilic
It is highly resistant and is used for removing oil mist and fumes.
This is because clogging occurs immediately.

[0003] It also consists of microporous polypropylene
The hollow fiber is used as an ultrafiltration membrane or reverse osmosis membrane for water treatment, He,
O ₂ , N ₂ It is known to use for gas separation such as
(See Japanese Patent Publication No. 56-52123).
Polypropylene hollow fiber is different from air filter media
Of oil mist, fume, etc.
It is almost impossible to use it as a filter medium for removing carbon dioxide.

[0004] The porous fine fiber of synthetic resin are known,
Filtration membranes and wipers for water treatment such as production of sterile water and filtration of activated carbon
It is also known to use as
No. 01979), which is called oil mist, Hugh
It has not yet been used as an air filter for removing
Not tried well.

[0005] In addition, the filter material is
Is known in the art (JP-A-52-1526).
No. 62), powdery mist such as oil mist and fume
Collect foreign particles such as particles and dusty particles such as dust
In order to Combining multiple types of fibers
Its use has not been proposed yet.

In the past, oil mist, powder mist such as fume
As a filter for collecting particles and dust- containing particles such as dust from a gas containing these particles , a laminated filter made of solid fine glass fibers of several μmφ or less has been used. The disadvantages in this case are that once collected oil oozes out to the secondary side and re-scatters to contaminate the secondary side, or the oil adheres and grows on the filter media fibers, pores are closed and pressure loss increases, Furthermore, the filter medium has a problem that the thickness of the voids of the fibers is reduced due to the adhesion of the oil, the pores are eliminated, and finally, the filter media is flattened and the air cannot be ventilated. In addition, the roll-up type filter medium has a problem that the weight increases due to the collected adhering substances, resulting in a muddy state, which makes handling very difficult.

[0007]

[Problem to be solved by the invention] This invention has been made to solve the above problems, and has been made.
The most hydrophobic and lipophilic polyp among synthetic resins
Focusing on the properties of propylene, use polypropylene as a raw material
Mainly composed of hollow porous fibers, which have low lipophilicity.
Woven fabric made by mixing fiber and / or synthetic resin fiber
Mist, fume, etc.
Foreign particles such as fine particles of dust and dusty particles such as dust
An object of the present invention is to provide an air filter that can efficiently collect both of the children .

[0008]

SUMMARY OF THE INVENTION The present invention provides a means for solving the above-mentioned problems, and uses polypropylene as a raw material.
Mainly composed of hollow porous fibers, and 0.2 to 10
μmφ glass fiber and / or 1-50 μmφ
Nonwoven fabric made by mixing solid fine fibers made of synthetic resin
Is used as a filter medium, and the mixing ratio is 5 to 4 glass fibers.
0%, synthetic fibers within a range of 5 to 60%, and a total of 60
%, Oil mist and fume
Capable of collecting both mist-like particles such as dust and dust-like particles such as dust
The purpose of the present invention is to make an effective air filter.

[0009]

The air filter of the present invention mainly comprises hollow porous fibers having a large surface area and made of polypropylene, which is the most hydrophobic, lipophilic and flammable synthetic resin.
Solid fiber such as glass fiber with low lipophilicity
Because the nonwoven fabric made by mixing fibers is used as the filter material,
Fine particles such as oil mist and fumes and dust
When a gas containing both dusty particles is passed, the gas passes not only on the surface of the filter medium fiber but also through the hollow porosity and the inside of the cavity, so that there are many opportunities for contact with the filter medium and the oil content contained in the gas It is attracted to the hollow porous polypropylene fibers, finely divided dust particles by the filter medium such as glass fiber
Because it is collected, both foreign particles are efficiently collected,
In addition, since the collected oil adheres to the surface of the fiber and the inside of the porous cavity, the oil absorption capacity is 20 to 2 times the weight of the filter.
When it reaches 5 times and the adsorption capacity is saturated, it can be used repeatedly simply by squeezing. Moreover, since the material is flammable, it can be incinerated after use and no toxic gas is generated.

[0010]

FIG. 1 shows an embodiment of an air purifying apparatus using the oil-adsorbing filter of the present invention. FIG. 1A shows a filter 1 formed in a roll shape so that it can be automatically wound from an upper supply roller 3 of a machine frame 2 to a lower winding roller 4, and a drawing roller is provided in front of the lower winding roller. 5 is provided so that attached oil can be squeezed and removed.

FIG . 1B shows a filter in which a large number of filters 1 are sewn in a bag shape and arranged in parallel, and the openings are supported by a frame 6. The winding filter shown in FIG. When the bag-shaped filter shown in b is used as a main filter and both are arranged in series in an exhaust duct to allow gas containing oil mist, fume, etc. to pass through, the oil contained in the gas is efficiently trapped. Can be gathered.

FIG . 2 shows a comparison example of pressure loss due to oil adsorption between an air filter using a nonwoven fabric made of hollow porous fibers made of polypropylene as a raw material and a conventionally known solid glass fiber air filter. The horizontal axis shows the oil retention (g / m ² ), the vertical axis shows the pressure loss (mmH ₂ O), curve a is the filter of the present invention, and curve b is a comparative performance curve. As can be seen at a glance, it can be understood that a has a much larger oil retention than b and a low pressure loss.

[0013] air filter of this invention is one in which a main object of oil adsorption can be generally dust be captured effectively hold as shown in FIG. 3, the oil mist
And dust can be removed . When higher performance is required, the dust collection performance can be improved by appropriately selecting the mixing ratio of solid fine fibers such as glass fiber and synthetic fiber.

In this case, it is needless to say that the collection efficiency can be arbitrarily selected by appropriately changing the basis weight in consideration of the properties and particle size distribution of the object to be collected. 1
5 to 40% glass fiber of 0 μmφ, 1 to 50 μ
It is preferable that the total mixing ratio of the synthetic fibers of mφ be within a range of 5 to 60% and 60% or less. When flame retardancy is required for use in a building or the like, a flame retardant treatment can be added by adding a chemical solution or the like.

[0015]

[Effect] The air filter of the present invention is mainly made of hollow porous fibers made of polypropylene, which is the most hydrophobic and lipophilic material among synthetic resins, and is made of glass having low lipophilicity.
Because essentially provided by a nonwoven fabric made by mixing a solid fibers in the fiber or the like, oil mist, fume and the like and
When passing a gas containing foreign particles such as dust, the gas passes not only on the surface of the filter medium fiber but also through the hollow porosity and the inside of the cavity, so that the contact area between the gas and the filter medium is large and is included in the gas. Both foreign particles are efficiently collected, and the collected oil adheres to the surface of the fiber and the inside of the porous cavity, so that the oil adsorption capacity is high, and when the adsorption capacity is saturated, simply squeeze. And can be used repeatedly, so that it can withstand long-term use and can be incinerated after use without generating toxic gas.

Further, the mixing ratio of the actual fine fibers in such as glass fiber or polyester against the hollow porous fiber
By properly selecting, it is possible to collect dust having a small particle size, and to purify gas containing both oil and dust.
Extremely useful.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between an oil adsorption holding amount and a pressure loss.

FIG. 3 is a diagram showing a relationship between dust collection efficiency and filtration resistance.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter 2 Body 3 Supply roller 4 Take-up roller 5 Squeeze roller 6 Frame

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B01D 39/14-39/20

Claims (4)

(57) [Scope of request for utility model registration] 1. A hollow porous material made of polypropylene.
It is mainly made of fiber, and the glass
Made of fiber and / or synthetic resin of 1 to 50 μmφ
A non-woven fabric made by mixing solid fine fibers is used as a filter medium.
The mixing ratio is 5-40% for glass fiber and 5 for synthetic fiber.
Within the range of 60% and 60% or less in total.
Atomized particles such as oil mist and fume characterized by
Air that can collect both dust and dusty particles such as dust
filter. 2. A hollow porous material made of polypropylene.
It is mainly made of fiber, and the glass
Made of fiber and / or synthetic resin of 1 to 50 μmφ
A non-woven fabric made by mixing solid fine fibers is used as a filter medium.
The mixing ratio is 5-40% for glass fiber and 5 for synthetic fiber.
Within the range of 60% and 60% or less in total.
The filter 1 is formed in a roll shape, and the upper supply roller 3 of the machine frame 2 is formed.
To the lower take-up roller 4 from the
A squeeze roller 5 is provided in front of the take-up roller to remove the adhering oil.
A feature that can be removed by squeezing.
Atomized particles such as ilmist and fume and dust such as dust
Air filter capable of trapping both particulate particles. 3. A hollow porous material made of polypropylene.
It is mainly made of fiber, and the glass
Made of fiber and / or synthetic resin of 1 to 50 μmφ
A non-woven fabric made by mixing solid fine fibers is used as a filter medium.
The mixing ratio is 5-40% for glass fiber and 5 for synthetic fiber.
Within the range of 60% and 60% or less in total.
The sewing machine 1 is sewn into a bag shape and a large number of
Oil mist characterized by being supported by
Both dusty particles such as dust and dusty particles such as dust.
Air filter that can be collected. 4. The roll-up air filter according to claim 2,
The bag-shaped air filter according to claim 3, which is a pre-filter.
As the main filter, and both in series in the exhaust duct
Oil mist, fume, etc.
Capable of collecting both mist particles and dust particles such as dust
Air filter.