JPS607780Y2 - Concentration buffer device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a concentration buffering device for leveling (averaging) concentration fluctuations of a specific component contained in a fluid, particularly in a gas to be supplied.

Fluctuations in the concentration of specific components in fluids are observed in various cases.

For example, various processing blades and treatment methods are applied to harmful gases emitted from chemical factories and harmful components contained in wastewater, but these processing devices usually control the concentration of specific target components in fluids with high concentration fluctuations. Designed with a focus on the state.

Therefore, there may be excessive equipment, or stable processing may not be possible.

In addition, these processing means are supplied with a uniform concentration of the specific component and have little fluctuation, allowing stable processing to continue efficiently and economically.

In addition, the specific components in the fluid are not limited to harmful substances, but even in devices that extract necessary components, the concentration of the components is required to have little fluctuation.

However, as a means to reduce such concentration fluctuations, there is a known buffering means that averages the concentration by forming a reservoir in the middle of the flow. Therefore, it was only applied when the flow rate or concentration fluctuations were very small.

One of the inventors of the present invention has previously focused on the fact that activated carbon particles or fibers have a buffering effect as a means of buffering specific components in fluids. We found and proposed that a sheet material with a thickness greater than that is suitable.

That is, activated carbon fibers obtained by firing and activating fibrous materials such as cellulose fibers, polyacrylonitrile fibers, poval lignin fibers, or phenol fibers or conventionally known activated carbon particles can be used as activated carbon fibers. The aim was to reduce concentration fluctuations by housing the liquid in a holder and passing fluid through it.

In this case, the concentration fluctuation refers to the percentage of the difference between the highest concentration and the lowest concentration in the target time period with respect to the highest concentration.

It is known that these activated carbons are used as adsorbents for solvent recovery, gas purification, decolorization, or as catalyst carriers. was its effective period.

However, the above-mentioned proposal does not involve adsorption filtration or recovery of a specific component, but is a so-called means for leveling fluid concentration fluctuations to reduce concentration fluctuations of a specific component.

The activated carbon used in this method is not only granular, but also particularly effective when used in a fibrous sheet material with a certain thickness or more.

However, how should these activated carbon fibers be placed in a fluid so that they can act efficiently?
Further, the problems of how to configure them to make them easy to handle, and how to form them so that they can be provided at low cost have not yet been considered.

The present invention has been developed based on these circumstances, and has solved all of the problems mentioned above.

However, a device that solves these problems is a perforated device in which an adsorption member that adsorbs specific components in the fluid and breaks through the mounting plate installed so as to block the flow of the duct in a part of the fluid duct. The cylindrical body is detachably attached, and the cylindrical body is configured such that its mounting side is open facing the fluid flow direction and the other end is closed, and the mounting plate forms a framework and serves as a part of the fluid duct. It is configured to be detachable from the outer frame formed in the section.

The present invention will be explained below based on the drawings. The figure shows an example in which the present invention is applied to a duct in which air is being supplied to reduce the concentration fluctuations of specific components contained in the air. I will explain.

Further, the illustrated example merely shows a specific example of implementation, and there is no reason why the present invention is limited to the illustrated device, and other means or designs can be modified and utilized within the scope described below.

FIG. 1 is a side view of the appearance of the present invention installed in an air supply duct, and FIG. 2 is a sketch showing the structure of a portion of FIG. 1, with a portion cut away.

Figure 3 is a partially cut-out sketch showing the configuration of the adsorbent holding cylinder removed in Figure 2, and Figure 4 is a sketch showing a part of Figure 3 in a different direction, showing the adsorbent holding cylinder. The posterior occluded side of the body is shown.

FIG. 5 shows another embodiment of the adsorbent holding cylinder, and only a part of the mounting portion is shown.

In these figures, 1 indicates an air supply duct, and the air supply duct 1 has a rectangular cross section.

However, when the device of the present invention is used in such a rectangular duct 1, it is preferable to form an enlarged portion 2 as shown in FIG. 1 and use the enlarged portion 2 as a buffer portion.

That is, as will be described later, in the concentration buffering device of the present invention, since a plurality of adsorbent holding cylinders are arranged at intervals, the flow area is naturally reduced, so it is necessary to form the enlarged portion 2 so as not to increase the flow resistance. This is preferable.

Thus, the enlarged portion 2 forms an outer frame 3 like a box with drawers, and the outer frame 3 is formed so as to open one side of the side wall.

Then, the box frame indicated by 4 is housed in the outer frame 3 through this opening.

That is, the box frame 4 is slidably fitted into the outer frame 3 like a drawer, and the box frame 4 is stably held within the outer frame 3 using an appropriate hooking device or fastening member (not shown).

Further, both walls of the outer frame 3 communicate with the duct 1.

Reference numeral 9 denotes a handle that facilitates handling of the box frame 4.

As shown in Fig. 2, the box frame 4 is attached to a relatively thick front wall 5 (mounting plate) formed on the air supply contact surface, and to frames 6 and 7 fixed to the front wall 5, respectively. Side wall plate 8.8.8
．． 8, and the facing side (rear side) of the front wall 5 is open.

Although the box frame 4 is shown as having its peripheral walls surrounded by side wall plates 8, it may also be constructed of only the side wall plates 8 provided with handles 9 and other side wall plates may be removed. Other configurations and means can be used as long as they are kept airtight in relation to the outer frame 3.

In addition, although the front wall (mounting plate) 5 of the box frame 4 is shown to be relatively thick, there is no reason to limit it to a thick plate. It may be constructed with a suitable front wall as long as the gap is covered, and in particular, only the attachment part of the adsorbent holding cylinder may be attached to the front wall 5, or the attachment part of the front wall 5 may be bent and attached to the bent part. A mounting portion for the adsorbent holding cylinder may be formed, and these can be implemented as appropriate by the practitioner.

Thus, a large number of mounting holes 10 are formed in the front wall 5, and the mounting holes 10 are provided at regular intervals S in the vertical and horizontal directions.

In the illustrated example, a threaded groove 11 is provided on the inner periphery of the mounting hole 10, and the adsorbent holding cylinder 12 is fixedly attached to the female threaded portion 11.

The adsorbent holding cylinders 12 are composed of a single unit, and are each independently attached to the box frame 4 in a detachable manner.

The adsorbent holding cylinder 12 may be made of activated carbon made of a laminate of carbon fibers or may be made of granular activated carbon, and a holding cylinder that can hold both types of adsorbent is conceivable. Since one is filamentous and the other is granular, the holding means will naturally be changed.

Therefore, when carbon fibers are used, rather than forming them in common and increasing gas flow resistance, the adsorbent holding cylinder should be suitable for the fibrous body and should be designed in consideration of flow resistance.

The adsorbent holding cylinder 12 illustrated in FIG. 3 is for activated carbon fiber.

That is, the adsorbent holding cylinder 12 has flanges 14 and 15 fixed to both ends of a cylinder 17 which has a large number of ventilation holes 16 on its circumferential surface and is open at both ends. A hole 14a communicating with the body 17 is formed, and the hole 1
A protrusion 13 is formed on the outer periphery of 4a, and a male threaded portion 13a screwed into the female threaded portion 11 is formed on the outer periphery.

On the other hand, the flange 15 fixed to the rear of the cylindrical body 17 forms a recess 19 that fits into the cylindrical body 17, as shown in FIG. Or it can be formed by joining.

Thus, the flange 15 closes the rear surface of the cylinder 17, and the recess 19 forms a cavity in which the handle 18 can be easily held by hand, thereby making it easy to attach and detach the adsorbent holding cylinder 12 and to handle it.

A laminated adsorbent material 20 of activated carbon fibers is placed on the outer periphery of the flanged perforated cylindrical core constructed in this way, and the fiber layer is made up of carbon fiber sheets, mats wrapped in squares, and split shapes. The carbon fibers are folded, folded, or folded, and a holding member 21 is provided on the outer periphery of the carbon fibers to prevent the carbon fibers from coming off and to protect them.

Therefore, the holding member 21 is preferably a wire mesh of a suitable mesh, and this wire mesh is formed using stainless steel wire, and the adsorbent holding cylinder 12 is surrounded by a lacing wire extending along the axial direction on a part of the circumferential surface. It was like barking.

Although this embodiment was formed as described above, the holding cylinder core may be formed into a spring core or a net shape, in short, it holds the carbon fiber laminate 20 in a ventilated manner, and a fluid inlet is formed on one side. However, as long as the other side is closed, other holding cylinders will also satisfy the present invention.

Note that the holding member of the adsorbent holding cylindrical body 12 may be replaced by a wire mesh and other linear material may be spirally wound.

In these examples, since the adsorbent was carbon fiber, its retention was relatively easy.

Although these adsorbent holding members are shown as holding cylinder cores made of a metal material, they may be integrally formed of a resin material and used as a replaceable type, and the practitioner can freely select and implement these members.

As described in detail above, the present invention is a part of a fluid duct, and when an adsorbent that adsorbs and penetrates a specific component is placed on a mounting plate that is installed to block the flow of the duct, activated carbon A fibrous material is held on the outer periphery of a perforated cylinder, and the inlet of this holding body is opened so that it can be attached to and detached from a mounting plate,
The other side is closed and the mounting plate that guides the introduced fluid to the outer circumferential side and supports these holders is configured to be detachable from the outer frame formed as a part of the duct, making it extremely easy to install and handle. The adsorbent holding member is also easy to handle and can be easily replaced, making it possible to provide the entire device at low cost.

However, since the amount of adsorbent used is less than the usual amount and no desorption/regeneration is performed, the effect of adsorption is extremely short-lived (several minutes to several tens of minutes) and can be ignored.

Further, the concentration on the outlet side does not become high during this period, which meets the purpose of the present invention.

In other words, when a new adsorbent is attached to the buffer device of the present invention and a fluid containing a specific component is flowed, only adsorption is performed until the adsorbent breaks through, and during this time the concentration of the specific component on the downstream side of the device is zero. However, the purpose of the present invention is to smooth out the concentration at the outlet of a treatment device for waste fluid containing specific components, thereby making the design and operation of the treatment device more economical. It is more preferable that there is, and it will meet the purpose of the present invention.

Note that the air volume and concentration that can be processed by this device cannot be determined unambiguously because they vary depending on the type and concentration of the specific substance, the pitch of concentration fluctuations, the duration of fluctuations, etc., and the operating conditions should be determined on a case-by-case basis.

For example, when a device equipped with a box frame as shown in Figure 2 is operated under the following conditions, the specific component concentration on the outlet side is 30.
Smoothed to ppm.

Adsorbent: activated carbon fiber with adsorption breakthrough Air volume: 38.7 po/min (20℃) Specific component nitrichlorethylene Inlet side maximum peak concentration: 600ppm Peak interval: 1 minute 2 types

[Brief explanation of the drawing]

FIG. 1 is an external side view of the present invention, and FIG. 2 is a sketch showing a part of FIG. 1, with the part cut away. FIG. 3 is a sketch of the adsorbent holding cylinder, partially broken away. FIG. 4 is a sketch of a part of FIG. 3 seen from another direction. 1...Fluid duct, 2...Enlarged part, 3
...Supination frame, 4...Box frame, 5...Front wall, 6,7...Curved frame, End...Side wall plate, 9...
...Handle, 10...Curved mounting hole, 11...Thread groove, 12...Adsorbent holding cylinder, 13...
Projection, 14, 15... Flange, 16... Curved ventilation hole, 17... Cylindrical body, 18... Handle,
19... Concavity, 20... Adsorbent (carbon fiber).

Claims (1)

[Scope of utility model registration request] A device that buffers the concentration of a specific component contained in a fluid using an adsorbent made of activated carbon fiber that has undergone adsorption breakthrough,
The device enlarges the fluid duct in a portion thereof;
A removable box frame arranged to block the flow in the direction of the duct is provided in the enlarged part, and an adsorbent made of activated carbon fiber that adsorbs and filters the specific component is attached to the front wall mounting plate of the box frame. A plurality of perforated cylinders arranged on the outer periphery are removably attached, and the perforated cylinder has a male threaded flange on the mounting side and a fluid inlet in the center, and the other end has a flanged end face and is closed. A member is inserted in the center thereof, a holding member is arranged around the outer periphery of the adsorbent, and the male threaded flange is screwed into a threaded mounting hole provided on a mounting plate. Concentration buffer device.