JP2003144915A - Activated carbon fiber element and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an activated carbon fiber (ACF) element having good current passing properties, fitted to the regeneration of the ACF element having adsorbed organic matter or the like in exhaust gas by electrothermal heating. SOLUTION: The ACF element 4 is formed by winding ACF felt 2 into a cylindrical shape. The insertion elements 19 of an attaching electrode 6 comprising a pedestal 8 and the insertion elements 10 are inserted in each of the end parts of the ACF element 4 to form a power supply conductive part and the pedestal 8 is a disc having a hole 12 formed to the central part thereof and the insertion elements 10 are bonded to the pedestal 8.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an activated carbon fiber element for adsorption treatment and a method for producing the same, and more particularly to an activated carbon fiber element suitable for regeneration by heating with power supply and a method for producing the same.

[0002]

2. Description of the Related Art In order to regenerate used activated carbon fiber (ACF) felt after adsorbing contaminants and the like, heating to a temperature (for example, 100 to 150 ° C.) at which the adsorbent is desorbed from the ACF felt. Then, the method of reproducing is usually adopted.

As a method of heating to this temperature, a method of heating with steam or hot air has been put into practical use. However, this heating method has low heating efficiency. Therefore, a regeneration method of ACF felt by self-heating has been studied as a regeneration method that can obtain high heating efficiency.

As a regeneration method of the ACF felt by self-heating, a regeneration method by microwave heating, ACF
There is a regeneration method by heating with power supply using a felt as a resistance heating element.

The regeneration method by microwave heating has high heating efficiency because microwaves are absorbed by the ACF felt. However, spark discharge occurs in the fluff of the ACF felt fiber, and it is difficult to prevent this spark discharge. Therefore, there is a problem in regeneration of the ACF felt which requires desorption of the flammable organic solvent.

On the other hand, in the reproducing method in which the ACF felt is used as the resistance heating element to heat the power supply, the above-mentioned problem of spark discharge does not occur.

[0007] However, the regeneration method in which the ACF felt is used as a resistance heating element to heat the power supply has not been put to practical use, although it is a method that has been conventionally studied as a regeneration method for heating the ACF felt with high efficiency. . The reason is that the contact resistance between the feeding electrode and the ACF felt cannot be reduced only by bringing the feeding electrode and the ACF felt into contact with each other, so that most of the heat generated by feeding occurs at the contact portion between the electrode and the ACF felt, This is because it is difficult to effectively heat the entire felt.

When power is supplied for a long time by such a method, a current path of extremely high temperature, that is, a so-called short path is generated in the ACF felt, which damages the ACF felt.

As a method for solving the above problems, ACF
A method is disclosed in which the felt is sandwiched between Cu electrodes, a compressive load of 0.5 kPa or more is applied, and electric power is supplied from the Cu electrodes to heat and feed the ACF felt to regenerate the ACF felt (Fiber). Pre
prints, Japan, Vol. 55 (200
0), No. 2 (Symposia)).

As an element for adsorbing contaminants, there are many cylindrical elements having a hollow interior made of a breathable material such as felt. When incorporating the above ACF felt and Cu electrode into this cylindrical element, a copper electrode tape is AC
The F-felt end portion may be attached and rolled up, or the electrode tape may be simultaneously rolled up when the ACF felt is rolled up.

However, in the step of processing the ACF felt and the electrode tape into a cylindrical shape having the same shape as the element, since the ACF felt is compressed to a constant bulk density by applying a compressive load, it is processed into a cylindrical shape. The operation in the process is very complicated and difficult.

In addition, when power is supplied to the electrode tape, it is necessary to attach the electric wire by directly soldering the electrode tape, and there is a problem that the attached electric wire is easily detached by cutting or the like.

[0013]

DISCLOSURE OF THE INVENTION As a result of intensive studies to solve the above problems, the present inventor has wound an ACF felt into a cylindrical shape and, on the other hand, forms a plurality of inserts on a pedestal. By forming protruding mounting electrodes, and inserting the mounting electrode inserts into the respective end portions of the cylinder, the power supply conductive portions can be easily formed on the end portions of the cylindrical ACF felt. I knew that I could do it.

According to this method, it is not necessary to wind the electrode tape at the same time when the ACF felt is wound to form a cylindrical shape and a compressive load is applied to manufacture the same element as in the prior art. Moreover, it has been found that the electrode can be simply and easily formed in an instant by simply inserting the electrode insert body when attaching the electrode.

Further, since it is sufficient to attach the power supply wires or the like on the respective end sides of the ACF element to the pedestal portion of the attachment electrode, it is known that the attachment can be reliably performed, and the present invention is realized. Has been completed.

Therefore, it is an object of the present invention to provide an activated carbon fiber element and a method for producing the same, which solve the above problems.

[0017]

The present invention which achieves the above-mentioned object is described below.

[1] An activated carbon fiber element obtained by winding an activated carbon fiber felt in a cylindrical shape, wherein an insert body of a mounting electrode composed of a pedestal and an insert body is inserted at each end side of the element. An activated carbon fiber element in which the pedestal is a disk having a hole in the center, and the insert is a plurality of inserts protruding from one side of the pedestal.

[2] A sheet-shaped activated carbon fiber felt having both ends formed in parallel is wound to form a cylindrical shape, and a disk having a hole in the center is used as a pedestal, and an insert is joined onto the pedestal to mount the pedestal. Forming an attachment electrode consisting of
A method for manufacturing an activated carbon fiber element, wherein an insert of the attachment electrode is inserted into each end of the cylinder to form a conductive portion for power supply.

[3] A base metal adhering portion is formed on each end side of a sheet-like activated carbon fiber felt having both ends formed in parallel by utilizing electrolytic plating, electroless plating, or vacuum vapor deposition, and then this The method for producing an activated carbon fiber element according to [2], wherein the activated carbon fiber felt is wound into a cylindrical shape.

[4] An element core is fitted inside the cylinder formed by winding the activated carbon fiber felt, a tightening net is fitted outside the cylinder, and the activated carbon fiber felt is tightened [2] or The method for producing an activated carbon fiber element according to [3].

[5] The method for producing an activated carbon fiber element according to [4], wherein the element core and the tightening net are non-conductive.

[0023]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing an example of the ACF element of the present invention. FIG. 2 is a partial front cross-sectional view showing the AA cut surface in FIG. 1.

The activated carbon fiber (ACF) element of the present invention is formed by winding an ACF felt 2 in a cylindrical shape a plurality of times as shown in FIGS. In FIG. 2, element 4
Inserted bodies 10 of the mounting electrodes 6 are inserted into both end sides of the to form conductive portions for power supply.

As shown in FIG. 2, the mounting electrode 6 comprises a disk-shaped base 8 having a hole 12 in the center thereof, and a plurality of pointed needle-like inserts 10 projecting from the base 8. .

The length of the insert 10 is 20 to 70 mm, preferably 30 to 50 mm.

If the length of the insert 10 is less than 20 mm, the conductivity of the power supply conductive portion will be reduced, which is not preferable. If the length of the insert 10 exceeds 70 mm, AC
It is not preferable because the size of the F element becomes larger than necessary and becomes heavy.

FIG. 3 is a schematic view showing an example of the needle-shaped insert body, (a) is a front view thereof, and (b) is a side view thereof.

As the material of the pedestal of the mounting electrode and the insert, a conductive metal such as Cu, Ti, Ni alloy,
Metals such as Cu alloys and Ti alloys can be used.

The insert is preferably shaped so that one end is joined to the pedestal and the other end can be inserted into the end of the ACF element. For example, the insert is not limited to a needle-like insert, but a flat insert or the like. Can be used.

FIG. 4 is a schematic view showing an example of a flat plate-like insert body, (a) is a front view thereof, and (b) is a side view thereof. In addition, in FIG. 4, the longitudinal direction of the flat plate-shaped insert faces the front, but this longitudinal direction is parallel to the circumferential direction of the pedestal disk.

Furthermore, since the power supply wires and the like on each end side of the ACF element may be attached to the pedestal portion of the attachment electrode, the ACF element of the present invention which can be attached reliably is provided with the same. If the structure is within the above range, the manufacturing method thereof is not particularly limited, but it can be manufactured, for example, by the following manufacturing method.

(ACF Felt) Since the ACF element of the present invention has a cylindrical shape, both ends of the unprocessed sheet-like ACF felt used for the ACF element of the present invention are parallel. There is no limit to the number of windings of the ACF felt in the process of forming the element shape in the subsequent step,
When wound around 70 layers and processed into a cylindrical shape, the thickness of the ACF felt is preferably 30 to 200 mm, and 15 to 15
0 mm is more preferable. This makes the bulk density distribution of the ACF felt uniform.

(Attachment of Metal to ACF Felt) Electrolytic plating, electroless plating, vacuum deposition, or the like is used as necessary for the edge side of the sheet-like ACF felt of 10 to 60 mm, preferably 20 to 30 mm. Then, the base metal is adhered to form the base metal adhering portion.

The base metal deposited on the end side of the ACF felt can be appropriately selected and used according to the deposition method. Specifically, in the case of electrolytic plating, Cu, Ni,
Zn, Sn, etc. can be used, Ni, Co, Cu, Ag, etc. can be used for electroless plating, and Cu, Ni, Au, Ag, etc. can be used for vacuum deposition.

As described above, when the base metal is adhered to the end of the ACF felt, A in the conductive portion for power supply is A.
The electric resistance between the CF and the mounting electrode can be further reduced.

It is preferable that the base metal is completely covered with the felt surface on the side of the felt end, but it is usually preferable to cover 30% or more of the surface area.

(Processing into Element Shape) The above ACF felt is processed into a cylindrical element shape.

After processing the ACF felt into a cylindrical shape,
The ACF felt is preferably compressed to a bulk density of 70 to 120 kg / m ³ . As a result, the strength and air permeability of the ACF felt during adsorption treatment and desorption regeneration treatment become appropriate.

The compression of this ACF felt is performed by fitting an element core inside a cylinder formed by winding the ACF felt, fitting a tightening net outside the cylinder, and tightening an activated carbon fiber felt. , Can be compressed.

The element core and the tightening net are preferably non-conductive.

[0043]

When manufacturing the ACF element of the present invention, it is not necessary to simultaneously wind the electrode tape. Moreover, the operation of attaching the electrode is only the operation of inserting the insert body of the electrode, which is simple, easy, and possible in an instant.

Further, since the power feeding wires and the like on each end side of the ACF element may be attached to the pedestal portion of the attachment electrode, the attachment can be surely performed.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of an ACF element of the present invention.

FIG. 2 is a partial front cross-sectional view showing a cross section AA in FIG.

FIG. 3 is a schematic view showing an example of a needle-shaped insert of a mounting electrode used in the ACF element of the present invention, (a) is a front view thereof, and (b) is a side view thereof.

FIG. 4 is a schematic view showing an example of a flat plate-like insert body of a mounting electrode used in the ACF element of the present invention, (a) is a front view thereof, and (b) is a side view thereof.

[Explanation of symbols]

2 ACF felt 4 ACF element 6 Mounting electrode 8 pedestals 10 Insert 12 pedestal holes

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mikio Akamatsu             Toho Kako, 234 Uechikari, Nagaizumi-cho, Sunto-gun, Shizuoka Prefecture             Construction Co., Ltd. F-term (reference) 4G066 AA02D AA05B BA01 BA16                       CA01 FA40 GA02

Claims (5)

[Claims] 1. An activated carbon fiber element obtained by winding activated carbon fiber felt into a cylindrical shape, wherein an insertion body of a mounting electrode including a pedestal and an insertion body is inserted at each end side of the element. An activated carbon fiber element that forms a conductive part for power supply, the pedestal is a disk having a hole in the center, and the insert is a plurality of inserts provided on one surface of the pedestal. 2. A sheet-shaped activated carbon fiber felt having both ends formed in parallel is wound to form a cylindrical shape, and a disk having a hole in the center is used as a pedestal, and an insert is joined on the pedestal to form the pedestal. A method for producing an activated carbon fiber element, comprising forming a mounting electrode including an insert body, and inserting the insert body of the mounting electrode on each end side of the cylinder to form a conductive portion for power supply. 3. A base metal adhering portion is formed on each end side of a sheet-like activated carbon fiber felt having both ends formed in parallel by utilizing electroplating, electroless plating or vacuum deposition, and then the activated metal The method for producing an activated carbon fiber element according to claim 2, wherein the carbon fiber felt is wound into a cylindrical shape. 4. The activated carbon fiber felt is fastened by fitting an element core inside a cylinder formed by winding the activated carbon fiber felt, fitting a tightening net outside the cylinder, and tightening the activated carbon fiber felt. The method for producing the activated carbon fiber element according to 1. 5. The method for producing an activated carbon fiber element according to claim 4, wherein the element core and the tightening net are non-conductive.