JP2001170423A - Filter unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air filter capable of simultaneously removing dust particles contained in air and the polluted gas such as alkaline gas or acidic gas and capable of improving an environment in an air-conditioned room. SOLUTION: In a middle or high performance air filter formed by folding a sheet-shaped air filter material in zigzag and inserting a separator bended in a corrugate form between the partitions of folds, deodorizing function is provided to a filter material or a separator or the filter material and the separator in addition to conventional function in order to keep the indoor air of a building, a hospital equipment, a clean room, etc., clean.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter capable of simultaneously removing dust particles contained in air and contaminant gases such as alkaline gas and acidic gas. It is a thing to tighten.

[0002]

2. Description of the Related Art With the recent environmental changes, in air conditioning systems for buildings, hospital facilities and clean rooms, in addition to the conventional removal of dust particles, the removal of contaminant gases such as alkaline gas or acidic gas contained in the air. Is being demanded.

[0003] Generally, in air filters such as a medium-performance or ultra-high-performance filter, the driving density of a filter material is increased to maintain higher filtration efficiency. On the other hand, if the density of the filter material is increased, the pressure loss of the filter material increases,
A phenomenon occurs in which the amount of passing air decreases.

[0004] Therefore, as a method of measuring the increase of the passing air volume and the reduction of the pressure loss, the filter medium is folded into a pleated shape,
A method is employed in which a separator is interposed between the folds to increase the area of the filter medium. The following methods have been tried to have not only a dust particle removing function but also a deodorizing function.

(1) A method of imparting a deodorizing function by attaching or impregnating a filtering material with a deodorizing material. (2) A method in which carbon fibers having a deodorizing effect are entangled in the material of a filter or a separator to have a deodorizing function.

(3) A method in which a filter having a deodorizing effect is provided before or after the filter unit so as to have a dust removing function and a deodorizing function.

[0007]

However, in the above-mentioned method, in the case of (1), there is a problem that the pressure loss of the filter medium itself increases and the amount of air passing therethrough decreases.
In the case of (2), there is a problem that if one of them has a long life, the other must be replaced even if it has a long life.
In the case of (3), there is a problem that an installation space for mounting is required.

Further, there are problems that processing and assembling become complicated and cost increases. The present invention has been made in view of the above circumstances, its purpose is to provide a filter unit having a dust particle removal function and a deodorization function at an air conditioning intake of a building, a hospital facility, a clean room, or the like,
An attempt is made to maintain a comfortable indoor environment through this filter unit. The present invention satisfies these requirements and provides a small and inexpensive filter unit.

[0009]

According to the present invention, a medium- or high-performance air filter is formed by folding a sheet-like air filter material in a zigzag pattern and inserting a corrugated separator between the partition walls of the pleat. In the filter, the filtering material or the separator or the filtering material and the separator are provided with a deodorizing function in addition to the conventional functions, so that the air in a room such as a building, a hospital facility or a clean room is kept clean.

[0010] In order to achieve the above object, a filter material or a separator according to the present invention is prepared by irradiating a woven or non-woven fabric made of long fibers or short fibers with a radiation and then impregnating the polymerizable monomer with an anion or a graft. A filter unit formed by forming a cation exchange group and having a dust particle removing function and a deodorizing function, folding the filter medium in a zigzag shape, and inserting the separator bent in a wavy manner between partition walls of the filter. Is formed.

By installing the filter unit at an air-conditioning inlet of a building, a hospital facility, a clean room, or the like, dust particles contained in the air and contaminant gases such as an alkaline or acidic gas can be removed from the filter material or the separator or the separator. It is removed by the filter material and the separator and supplied to the room as clean air to maintain a comfortable indoor environment.

The polymerizable monomer includes vinyl sulfonic acid, styrene sulfonic acid, glycidyl vinyl pyridine acrylate, methacrylic acid, arylamine, chloromethylstyrene, etc., which are appropriately selected depending on the necessity of a cation exchange group and an anion exchange group. The selection is not limited to these ranges.

The cation exchange group includes a sulfonic acid group, a carboxyl group, a phosphate group and the like, and the anion exchange group includes a secondary, tertiary and quaternary ammonium group. The adhesion amount of these ion exchange groups is 0.2 to 3.0 m.
eq / g.

In the present invention, a highly durable polyolefin fiber such as polyethylene or polypropylene is used as a base material, and irradiated with radiation such as α-rays, β-rays, γ-rays, X-rays and electron beams to react. Generates initiating species (radicals). The substrate after the irradiation is immersed in the polymerizable monomer-containing solution, and the polymerizable monomer is graft-polymerized to the substrate fibers. As a result, a polymer in which this polymerizable monomer is bonded to a polyolefin fiber as a side chain for graft polymerization is produced. By reacting the produced polyolefin fiber having a polymerizable monomer as a side chain with a compound having an anion exchange group or a cation exchange group, an ion exchange group is introduced into the polymerizable monomer having a graft polymerized side chain. The final product is obtained. In this product, an ion exchange group is not introduced into the polyolefin fiber as the main chain, but an ion exchange group is introduced into a polymerizable monomer in a side chain graft-polymerized into the main chain. Therefore,
Such a product is an ionic alkaline gas in the air,
When it comes into contact with a contaminant gas such as an acid gas, the adsorption and removal of the contaminant gas is remarkably superior to those in which an ion exchange group is bonded to the main chain of the substrate. This is because, in the substrate of the present invention, when it comes into contact with a contaminant gas, the polymerization side chain oscillates and comes into contact with the gas to efficiently contact the ion exchange group of the graft polymer. The rate will be excellent.

The filtering material may be a combination of a woven or nonwoven fabric having ion-exchange groups formed by a radiation graft polymerization method and a conventional filtering material of glass wool, woven or nonwoven fabric. The corrugated cardboard material may be formed by forming ion-exchange groups by radiation graft polymerization, or the aluminum material may be coated with a deodorizing solution containing ion-exchange groups by radiation graft polymerization. Furthermore, although the shape of the separator was corrugated,
It may have a honeycomb shape, and does not change the gist of the present invention.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partially enlarged perspective view of the present invention.

Reference numeral 1 denotes a woven or non-woven fabric filter made of long fibers or short fibers having an ion-exchange group formed by a graft polymerization method, and 2 denotes a long or short fiber formed of an ion-exchange group by a graft polymerization method. Or a nonwoven fabric made of long fibers or short fibers having ion-exchange groups formed by a graft polymerization method, a kraft material, or a separator made of an aluminum material.

Since the present invention has such a structure, the air A containing dust particles and contaminant gas passes through the surface of the surface separator 2 having a deodorizing function while being mainly deodorized, and is deodorized. After passing through a filter medium 1 having an area, dust particles are removed and deodorized, and the backside separator 2 is formed again.
Deodorizes by contacting the surface of the surface.

[0019] Here, the filter medium is formed only by forming an ion-exchange group on a woven or nonwoven fabric by a radical polymerization method so as to have a deodorizing function. Thus, a filter unit having the same air resistance as a conventional filter, effectively removing dust, and having a small pressure loss can be obtained.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. After irradiating the woven or nonwoven fabric, a polymerizable monomer monomer of styrene sulfonic acid or glycidyl acrylate is contacted to form a cation exchange group or an anion exchange group, respectively. As a result, a cation exchange group, ie, an alkali gas adsorption function, or an anion exchange group, ie, an acid gas adsorption function is formed.

The woven or nonwoven fabric is folded in a zigzag pattern to form an air filter, and a separator made of the woven or nonwoven fabric or a kraft material, an aluminum material, or the like is folded between corrugated partitions into a corrugated shape. Insert to form an air filter unit. When the above air filter unit was attached to a test duct and tested, the following results were obtained. Test conditions Filtration wind speed 2.5m / see Temperature condition 25 ° C Humidity condition 65% Test duct Air dust Test gas Ammonia 100PPm Hydrogen sulfide 100PPm Test measuring instrument Detector tube

[0022]

[Table 1] Test results

[0023]

The present invention is a filter unit comprising a filter or a separator provided with an ion exchange group by radiation graft polymerization and having a deodorizing function, so that the deodorizing effect can be maintained while maintaining the conventional dust removing function. Is extremely effective.

[Brief description of the drawings]

FIG. 1 is a view showing a filter structure of a filter unit of the present invention.

[Explanation of symbols]

 1 Filter media 2 Separator

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noboru Abe 1233 Watanukicho, Takasaki City, Gunma Prefecture Japan Atomic Energy Research Institute Takasaki Research Institute (72) Inventor Tomofumi Shiraishi 1233 Watanukicho, Takasaki City, Gunma Prefecture Japan Nuclear Research Institute Takasaki Research Institute ( 72) Inventor Masayuki Okamoto 1-37 Kuretsutsumi, Hiratsuka-shi, Kanagawa Japan Air Filter Co., Ltd. (72) Inventor Takeharu Nakamura 3-16-6 Nishishinjuku, Shinjuku-ku, Tokyo Shinwa Tech Co., Ltd. F Term (reference) 4D019 AA01 BA02 BA04 BA13 BB02 BB03 BB10 BC04 BC10 CA02 CB06 DA01 DA02

Claims (5)

[Claims] 1. An air comprising a filter material having a deodorizing function by forming an ion-exchange group by a radiation graft polymerization method on an aggregate of short fibers and long fibers composed of short fibers and long fibers, and air comprising a separator as a constituent material. Filter unit. 2. An air filter unit comprising a separator having a deodorizing function by forming an ion-exchange group on an aggregate of short fibers and / or long fibers made of short fibers and / or long fibers by a radiation graft polymerization method. 3. An air filter unit comprising the filtering material according to claim 1 and the separator according to claim 2. 4. An air filter unit comprising the filtration material according to claim 1 and a conventional filtration material made of glass fiber, the filtration material being a constituent material. 5. The filter medium or separator according to claim 1, wherein the filter medium or the separator is a polyethylene or polypropylene polyolefin fiber as a base material,
Irradiation of X-rays, β-rays, γ-rays, X-rays or electron beams, and immersing the irradiated fiber base material in a polymerizable monomer-containing solution to bond the polymerizable monomer to the fiber base material as a graft polymerization side chain An air filter unit comprising a polymerizable monomer having an anion-exchange group and / or a cation-exchange group, and the ion-exchange group introduced into a polymerizable monomer having a polymerizable side chain.