JPH09225248A - Gas treating device using adsorbent mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely device a driving net even though friction resistance in increased at an adsorption part and a desorption part by attaching driving bars to a driving net, fixing each end of the driving bar to a driving chain and fitting a friction reduction means on each roller shaft. SOLUTION: The driving net 9 is wound around each of the rollers 4 and an adsorbent mat 5 is piled thereon. The driving chain 16 is wound around sprockets 15 at both ends of each shaft 3, and the driving bars 17 are attached on the driving net 9 in the width direction of the driving sheet 9 at regular intervals in the longitudinal direction, and both ends are fixed to respective driving chains 16. Also between the driving net 9 and each roller 4, between the roller 4 and the shaft, and between the sprocket 15 and the shaft, friction reduction means such as bearings are interposed. Thus, a driving force of the driving chain is transferred to the driving net uniformly over the entire width via the driving bar and even though the friction resistance at the adsorption part or the desorption part is increased, the driving net can be surely driven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas treatment device using an adsorbent mat that moves in a circular manner.

[0002]

2. Description of the Related Art Removal processing of solvents and malodorous components contained in exhaust gas generated in coating factories and semiconductor manufacturing factories,
Alternatively, an adsorption treatment with an adsorbent such as activated carbon is mainly used for the recovery treatment of the solvent and the like. As a device for continuously performing these adsorption treatments, there is a gas treatment device in which a gas is passed through an orbiting adsorbent mat to continuously adsorb and desorb a solvent at the same time.
336, Japanese Patent Laid-Open No. 5-277331.

In the gas treatment device 1 described above, FIG. 4 and FIG.
As shown in the internal structure, the adsorbent mat 5 is attached to each roller 4 of the four roller shafts 3 supported in the casing 2.
(For example, a felt containing activated carbon fibers having a fiber diameter of 10 to 20 μm is wrapped on both sides with a wear-resistant non-woven fabric to have a thickness of 10 to 2
A 0 mm endless belt-shaped activated carbon mat) is wound around, and the adsorbent mat 5 is driven by a motor 6 to move in the casing 2 in the direction of arrow A. On both sides of the circulation path, the gas to be treated G1 containing the solvent is transmitted to cause the solvent to be adsorbed by the adsorbent mat 5, and the treated gas g1
Is provided to the outside of the device 1, and the desorption gas G2 (high temperature air of 100 to 130 ° C.) is made to pass through the upper surface of the circulation path to separate the solvent adsorbed on the adsorbent mat 5, High concentration of solvent (20 to 30 times concentration of exhaust gas)
A desorption unit 8 is provided for sending the concentrated gas g2 contained in 1 to a catalytic combustor (not shown). Therefore, this gas treatment device 1
Then, the adsorption process and the desorption process can be continuously and simultaneously performed on the circulation path of the adsorbent mat 5.

As shown in FIG. 5, the adsorbent mat is superposed on a drive net 9 wound around four rollers 4a to 4d, and the drive net 9 is made of a soft material such as rubber (not shown). ), The adsorbent mat 5 is driven by the drive net 9 and circulates on the circulation path.

In the lower part of the circulation path, the drive net 9 is lifted by the tension roller 10 to apply tension to the drive net 9, and the winding angle around the drive roller 4a is increased to increase the drive friction force. The adsorbent mat 5 is separated from the drive net 9 in the lower part of the circulation path and becomes free, so that the drive net 9 is prevented from being damaged by excessive tension.

As shown in FIG. 4, the orbiting adsorbent mat 5 and the drive net 7 are sandwiched between ducts at the adsorbing portion 7 and the desorbing portion 8 and are in contact with the openings of the respective ducts over substantially the entire width thereof. That is, in the adsorption section 7, the opening of the supply duct 11 for the gas to be processed G1 is in contact with the adsorbent mat 5, and the opening of the discharge duct 12 for the processing gas g1 is in contact with the drive net 9. In the desorption section 8, the opening of the desorption gas G2 supply duct 13 contacts the adsorbent mat 5, and the concentrated gas g2
The opening of the exhaust duct 14 is in contact with the drive net 9. At these contact portions, measures are taken to reduce gas leakage from the contact sliding portions (see Japanese Patent Laid-Open No. 5-277321) by configuring the duct opening and setting the pressure difference between the inside and outside of the duct. Lattice-shaped supports (not shown) are provided in the openings of the holes 12 and 14 to prevent the adsorbent mat 3 and the drive net 7 from being pushed into the discharge ducts 12 and 14 by the wind pressure.

[0007]

However, in the gas treatment device 1 described above, the drive net 9 is driven by the drive roller 4a. Therefore, in a large-scale device such as an exhaust gas treatment device of an automobile painting factory, the adsorption part 7 and the desorption part 8 have a large gas permeation area and the wind pressure acting on the adsorbent mat 5 increases the frictional resistance between the drive net 9 and the openings of the discharge ducts 12 and 14, so that the friction with the drive roller 4a is increased. Depending on the situation, there is a problem that the drive net 9 cannot be driven.

When the frictional force between the drive roller 4a and the drive net 9 is insufficient, the drive net 9 slips on the surface of the roller 4a to cause slack and wrinkles on the drive net 9, and the adsorbent mat 5 overlaid thereon is smoothly moved. You will not be able to move around.

In order to increase the power transmitted to the drive net 9, the rollers 4a to 4d are all covered with rubber, and
Even if a sprocket is provided on each of the roller shafts 3a to 3d and the drive net 9 is driven by all the rollers 4a to 4d, the frictional resistance at the adsorbing section 7 and the desorbing section 8 is reduced by the rollers 4a to 4d.
When the driving frictional force of 4d is exceeded, slippage occurs between the rollers 4a to 4d and the driving net 9.

Therefore, regardless of the frictional force with the roller 4,
When the drive net 9 is directly driven by a chain, the drive net 9 can be driven, but if there is a slight difference between the roller diameter and the sprocket pitch diameter, the speed will be increased between the central portion and the peripheral portion of the drive net 9. Drive net 9 due to the difference
Wrinkles occur. Moreover, even if the pitch diameter of the sprocket and the roller diameter are adjusted to be equal,
Since the drive net 9 is stretched as described later, slack and wrinkles of the drive net 9 cannot be avoided.

An object of the present invention is to provide a gas treatment device which can reliably drive the drive net even if the frictional resistance at the adsorption portion and the desorption portion increases.

[0012]

The above-mentioned object of the present invention is solved by the structure of claim 1. That is, in the gas treatment device of the present invention, a drive rod is attached to a drive net in a direction traversing the drive net at regular intervals, each end of the drive rod is fixed to a drive chain, and a roller is attached to each roller shaft. A means for reducing friction with the drive net is provided.

With this drive rod, the drive force of the drive chain is transmitted over the entire width of the drive net, so that the drive net is reliably driven, and the drive net is not loosened or wrinkled. Further, the tension acting on the drive net due to the frictional resistance at the adsorption portion and the desorption portion is transmitted to the drive chain via the drive rod, so that the extension of the drive net is reduced.

Further, by means of the friction reducing means between the roller and the drive net, even if there is a difference between the pitch diameter of the sprocket of the drive chain and the roller diameter, there will be no speed difference between the central portion and the peripheral portion of the drive net. It has become.

According to a second aspect of the present invention, the friction reducing means is a means for making the roller and the sprocket of the roller shaft rotatable, and a bearing or a fluororesin is provided between the roller and the roller shaft or between the sprocket and the roller shaft. It suffices to provide a sliding bearing such as the above so that the roller and the sprocket can rotate relative to each other.

As a simpler friction reducing means, claim 3
As described in, even if the peripheral surface of the roller is simply covered with a low friction material such as fluororesin, the speed difference between the central portion and the peripheral portion of the drive net is eliminated, and the wrinkle of the drive net can be prevented. .

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing the internal configuration of the gas treatment apparatus of the present invention, and members common to those in FIGS. 4 and 5 will be described using the same reference numerals. In the gas treatment apparatus of the present invention, the drive net 9 is wound around the four rollers 4a to 4d, and the adsorbent mat 5 is overlapped and wound around the drive net 9 to move in a circular manner. This is similar to the conventional device described. In the gas treatment device of the present invention, each shaft 3a
A drive chain 16 is wound around sprockets 15 provided at both ends of 3d, and a drive rod 17 is attached to the drive net 9 in the width direction of the drive seat 9 at regular intervals in the longitudinal direction thereof. Both ends thereof are fixed to the drive chain 16, respectively.

As shown in FIG. 2, when the drive net 9 passes through the adsorbing portion 7 and the desorbing portion 8, the drive rod 17 has a large gap with the openings of the discharge ducts 12 and 14, and the casing 2
A flat plate having a small thickness is used so as not to increase the amount of air sucked therein, and the drive net 9 is sewn to the side in contact with the adsorbent mat 5 or wrapped with the net 18 to drive the drive net 9
It is attached in the width direction. In FIG. 2, the net 18 portion of the drive net 9 is exaggeratedly shown to be a net made of synthetic fiber or metal, but in actuality, when the net 18 passes through the adsorption portion 7 and the desorption portion 8, It is formed to have a thin thickness (0.5 to 1.0 mm) so as to reduce the suction amount of air (gas containing solvent leaked on the front side of the adsorbent mat 5) in the casing 2 through the fiber gap. Therefore, the elongation of the drive net 9 due to the tension is unavoidable, and wrinkles easily occur when the tension does not act uniformly in the width direction.

According to the above-mentioned structure of the present invention, the driving force of the drive chain 16 is reliably transmitted to the drive net 9 via the drive rod 17 and uniformly in the width direction, so that the wrinkles of the net 18 are wrinkled. To be prevented. Further, the tension of the drive net 9 generated by the friction between the adsorbing portion 7 and the detaching portion 8 is transmitted to the drive chain 16 via the drive rod 17, so that the extension of the net 18 is reduced. Therefore, even if the frictional resistance at the adsorption part 7 and the desorption part 8 increases due to the increase in size of the gas processing device, it can be easily dealt with by narrowing the installation interval of the drive rods 17, and the adsorbent mat 5 It is possible to maintain a smooth orbital movement. Further, another important point of the exhaust gas treating apparatus of the present invention is that a friction reducing means between the drive net 9 and each roller 4 is provided. One of the means is to provide a bearing or a sliding bearing such as a fluororesin between the roller 4 and the shaft 2 or the sprocket 15 and the shaft 2 in each roller shaft 2 so that the roller 4 and the sprocket 15 can rotate. That is what I did. As another friction reducing means, the outer peripheral surface of each roller 4 may be simply covered with a low friction material such as fluororesin (not shown).

In the example of FIG. 3, a bearing 19 is provided between the roller 4a and the shaft 3a on the shaft 3a supported by the casing 2 (only this shaft is provided with the driving sprocket 21). The bearing 19 allows the roller 4a and the sprocket 15 to rotate relative to each other, so that there is no difference in speed between the central portion and the peripheral portion of the drive net 9 which causes wrinkles.

[0021]

As described above, in the gas treatment apparatus of the present invention, the driving force of the driving chain is evenly transmitted through the driving rod by the driving net to the entire width of the driving net. Even if the frictional resistance increases at the detachable portion, the drive net can be reliably driven. Further, since the tension generated by the friction at the adsorption portion and the desorption portion is transmitted to the drive chain via the drive rod, the drive net is prevented from being stretched or loosened. Furthermore, by reducing the friction between the drive net and the roller, even if there is a difference between the sprocket pitch diameter and the roller diameter, the speed difference between the center part and the peripheral part of the drive net that causes wrinkles Does not occur.

Therefore, according to the gas treatment device of the present invention,
Even if the device becomes large and the frictional resistance of the adsorbing part and the desorbing part increases, the drive net can be reliably driven, so that the smooth circulating operation of the adsorbent mat is maintained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an internal configuration of a conventional gas treatment device.

FIG. 2 is a side sectional view showing an adsorbent mat and a drive net mounting structure in a conventional gas treatment device.

FIG. 3 is a perspective view showing an internal configuration of a gas treatment device of the present invention.

FIG. 4 is a partial plan view of a drive net in the gas treatment device of the present invention.

FIG. 5 is a side sectional view of a roller shaft in the gas treatment device of the present invention.

[Explanation of symbols]

 1 ... Gas treatment device 2 ... Casing 3 ... Shaft 4 ... Roller 5 ... Adsorbent mat 7 ... Adsorption part 8 ... Desorption part 9 ... Drive net 10.・ Tension roller 11, 13 ... Gas supply duct 12, 14 ... Gas discharge duct 15 ... Sprocket 16 ... Drive chain 17 ... Drive rod 18 ... Net 19 ... Bearing

Claims (3)

[Claims] 1. A gas treatment in which an adsorbent mat is superposed on a drive net wound around a plurality of roller shafts and wound around the net, and the gas is passed through the adsorbent mat moving around to perform an adsorption treatment. In the apparatus, a drive rod that crosses the drive net at regular intervals is attached to the drive net, and each end of the drive rod is fixed to a drive chain wound around a sprocket of each roller shaft, and the roller shaft is A gas treatment device using an adsorbent mat, characterized in that friction reducing means between a roller and a drive net is provided. 2. The friction reducing means is means for allowing the roller and the sprocket to rotate relative to each other.
The described device. 3. The apparatus according to claim 1, wherein the friction reducing means is a friction reducing means formed by coating a roller peripheral surface with a low friction material.