JPH07313825A - Honeycomb adsorbing body provided with filter - Google Patents

Abstract

PURPOSE:To prevent the deterioration of performance of a honeycomb adsorbing body due to dust deposition by mounting a filter formed by laminating a sheet having large dust collecting performance so as to form small holes having a shape easy to capture the dust and small in pressure damage closely or proximately to the end surface showing small holes of a honeycomb laminated body. CONSTITUTION:The filter 11 formed by laminating the sheet having large dust collecting performance so as to form the small holes easy to capture the dust is installed closely or proximately to the end surface showing the small holes of the honeycomb laminated body 1 having gas adsorptivity. The filter 11 is provided with the small holes having a smaller size and larger surface area per unit volume than that of the small holes of the honeycomb laminated body. And the filter 11 is formed by laminating the electrostatic-charged sheet. Further, the filter 11 is formed by laminating the sheet having a nappy surface. As a result, the deterioration of performance of the honeycomb adsorbing body due to the deposition of dust or the like is prevented for a long period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honeycomb adsorbent, especially an organic solvent vapor adsorbent, in which dust, oil mist or the like adheres to the end faces of the honeycomb laminated body and gradually solidifies to obstruct the air flow. The present invention relates to a honeycomb adsorbent in which the performance is prevented from deteriorating.

[0002]

2. Description of the Related Art In a conventional organic solvent vapor adsorbent, a honeycomb rotor 1 carrying an adsorbent is rotatably held in a casing 2 as shown in FIG. 7, and the rotor 1 is rotated by a motor 3 and a drive belt 4. Then, the treated air TA containing the organic solvent vapor, the malodorous substance, etc. is passed through the small through holes of the rotor 1 in the treatment zone 5, and the organic solvent vapor, the malodorous substance, etc. are adsorbed and removed to the honeycomb rotor 1 to obtain clean air CA. In the regeneration zone 6, high-temperature regeneration air RA is passed through the small through holes of the rotor 1 from the reverse direction to desorb and concentrate the organic solvent vapors, malodorous substances, etc. adsorbed on the rotor 1, and regenerate the rotor 1 continuously. Air is purified and regenerated air is concentrated air C
on A, organic solvent vapor concentrated by a combustor,
It burns offensive odorous substances and turns them into carbon dioxide and water, making them harmless and discharging them. The central angles of the processing zone 5 and the reproduction zone 6 are about 330 ° and 30 °, respectively.

In this case, when the treated air TA is fed into the rotor 1, organic solvent vapors, malodorous substances, etc. are dissolved in the treated air TA, and metal fine powder and other dust,
A prefilter 8 is attached to the duct 7 to capture and remove oil mist and the like, as shown in FIG. 8, but fine particles of about 1.0 μ cannot be captured by the prefilter 8. Leakage from the joint between the single filter and the single filter does not pass through the prefilter and dust adheres to the rotor surface, and as shown by 10 in FIG. The particles stick to each other, which obstructs the flow of air through the honeycomb rotor, and the performance of the honeycomb rotor deteriorates, making it unusable.

According to the experience of the inventor of the present invention over 20 years, the dust accumulation layer 10 is formed up to a depth of about 5 mm from the entrance of the small through hole 9. Almost no adhesion. However, since the dust accumulation layer 10 generated at the end face entrance of the small through hole 9 is solidified in a long time, it cannot be easily removed by washing or the like. The above must be deleted, and if it is deleted, it becomes unusable due to the sticker, and an expensive element is lost.

[0005]

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned defects and prevent the deterioration of the performance of a honeycomb adsorbent due to the accumulation of dust or the like over a long period of time. According to the present invention, a honeycomb laminated body having gas adsorbing properties is laminated and formed on the end surface where small through holes are formed so as to form a small through hole having a shape that easily catches dust with a sheet having a large dust collecting property and an extremely small pressure loss. This is achieved by mounting the resulting filters in close or close proximity. To make it easier to capture dust, for example, a method of making the size of the small through holes of the filter smaller than the size of the small through holes of the honeycomb laminate, and as a sheet having a large dust collecting property, for example, an electrostatically charged sheet such as an electretized sheet is used. It is possible to adopt a method such as selecting a sheet having a rough surface or a sheet having a fluffy surface. The material of the sheet used for this filter is selected from filter paper, flame-retardant paper, kraft paper, paper using activated carbon particles or fibers, other paper, and cloth. Further, it is desirable to use a flame-retardant material such as a sheet mixed with inorganic fibers in order to withstand high heat during regeneration of the honeycomb rotor.

The thickness of the filter, that is, the length of the small through holes is such that the above-mentioned dust or the like is deposited, that is, about 5 mm or more, preferably 2
It may be about 0 mm. In addition, it is desirable to reduce the manufacturing cost of this filter as much as possible in consideration of replacing it with a new one when dust or the like is accumulated to some extent due to use and the fluid passage resistance increases, and it is disposable. According to the experience of the present inventor, when the honeycomb adsorbent of the present invention is used for treating the exhaust containing the organic solvent vapor discharged from the coating booth, the filter has a porosity of the small through holes in about 6 months. Will be halved, so replace it.

[0007]

Example 1 As shown in FIG. 1, inorganic fiber paper having a thickness of 0.2 mm was laminated and formed into a honeycomb shape, and zeolite or high silica zeolite was fixed to the fiber gaps of the inorganic fiber paper and the wall surface of the small through holes. A honeycomb-shaped laminate 1 having the ability to adsorb organic solvent vapor and odorous components is obtained. The wavelength of the waves of this honeycomb is 3.4 mm, the wave height is 1.9 mm, and the thickness of the laminate is 400 mm. On the other hand, an inorganic fiber paper having a thickness of 0.2 mm is formed into a honeycomb shape, that is, flat paper and corrugated paper are alternately laminated and formed to obtain a honeycomb filter 11. The wave length of the corrugated paper in this honeycomb filter is 2.4 mm,
The wave height is 1.2 mm and the thickness of the filter is 10 mm. The one end face of the honeycomb-shaped laminated body 1 in which the small through holes are exposed is integrated with the one face of the honeycomb filter 11 in which the small through holes are exposed to obtain an adsorbent for an organic solvent vapor. In use, the process air T is supplied from the side of the filter 11 as described later.
A is fed in and regeneration air R is supplied from the side opposite to the filter 11.
Send A.

[0008]

[Example 2] According to the method described in JP-B-5-81831, a ceramic fiber paper having a thickness of 0.2 mm is laminated and formed into a honeycomb shape, and aluminum silicate aerogel is impregnated and fixed on this to obtain a honeycomb having a dehumidifying performance. A laminated body is obtained. The wavelength of this honeycomb wave is 3.4 mm, and the wave height is 1.9 m.
m, and the thickness of the laminated body is 200 mm. On the other hand, thickness 0.0
Flat paper and corrugated paper made of electretized synthetic fiber paper of 5 to 0.2 mm are alternately laminated to obtain a honeycomb filter. The wavelength of the waves of this honeycomb is 2.6 to 3.1.
mm, the wave height is 0.8 to 1.5 mm, and the thickness of the filter is 10 mm. The one surface of the honeycomb-shaped laminated body in which the small through holes are exposed is fixed to one surface of the honeycomb filter in which the small through holes are exposed to obtain a moisture adsorbent.

[0009]

Example 3 A honeycomb having a capability of adsorbing an organic solvent vapor and a malodorous component by laminating and forming an inorganic fiber paper having a thickness of 0.2 mm into a honeycomb shape and fixing zeolite to the fiber gaps and wall surfaces of the inorganic fiber paper. A laminated body is obtained. The wavelength of the waves of this honeycomb is 3.4 mm, the wave height is 1.9 mm, and the thickness of the laminate is 400 mm. On the other hand, as shown in FIG. 2, a large number of fluffy planar non-woven fabrics 12 and fluffy corrugated non-woven fabrics 13 made of synthetic fibers are alternately bonded and laminated in the same wave direction to obtain a honeycomb filter 11. The thickness of the non-woven fabric substrate is 0.1 to 0.3 mm, and the wave wavelength is 2.4 to 3.1.
mm, the wave height is 0.8 to 1.5 mm, and the thickness of the filter is 10 mm.

As shown in FIG. 3, the honeycomb laminated body 1 is rotatably held in the casing 2 as shown in FIG. 3, and the above-mentioned honeycomb filter 11 is attached to the inner surface of the casing 2 for introducing the treated air TA. In the figure, 14 indicates a seal.

In each of Examples 1 to 3 described above, a flat sheet and a corrugated sheet were alternately laminated to form a large number of small through holes as a filter provided in close contact with or close to the honeycomb laminate 1. As an example, as shown in FIG. 4, a flat sheet 15 made of an appropriate material is wound and laminated with spacers 16 such as synthetic resin or metal rods sandwiched at appropriate intervals, and wound between a plurality of sheets 15. It is also possible to use a filter that maintains the gap. Fine particles or fibers of activated carbon may be used as the material of this sheet, and adsorption of organic solvent vapor or the like may be carried out at the same time.

[0012]

OPERATION Honeycomb-like laminate 1 shown in Examples 1 and 2 above
The gas adsorber in which the honeycomb filter 11 is closely attached is shown in FIG.
As shown in FIG. 3, the duct 2 for the treated air TA, the duct 17 for the treated air CA, is rotatably held in the casing 2,
A reproduction air RA duct 18 and a concentrated air Con A duct 19 are attached, and a blast filter 8 is attached to the treated air TA duct 7. The honeycomb filter 11 is attached so as to come to the treated air TA inlet side of the honeycomb laminate 1. A heater H for heating the regeneration air RA is provided in the duct 18 for the regeneration air RA to perform hot air regeneration. Example 3
In the above case, the ducts, prefilter, and heater for heating the regenerated air RA are mounted on the casing 2 in exactly the same manner.

The organic solvent vapor adsorbent or the moisture adsorbent, that is, the rotor is rotated, and the treated air TA containing the organic solvent vapor, the odorous substance or moisture and the dust, the oil mist, etc. is passed through the prefilter 8 in the duct 7 to remove the dust. After capturing and removing the oil mist and the like, the dust and the oil mist are completely captured and removed by passing through the small through holes of the honeycomb filter 11, and the organic solvent vapor and the odor are removed in the processing zone 5 (see FIG. 7) of the rotor 1. Clean air or dry air CA that has absorbed or removed components or moisture is supplied. Even if the treated air contains solvent vapor of 10 to several hundred ppm and an extremely large amount of oil mist, metal fine particles and other dusts, filtration and adsorption are completely performed to obtain clean air or dry air. You can Meanwhile, regeneration air RA
Is heated to a required regeneration temperature by the heater H, that is, about 150 ° C., and then fed into the regeneration zone 6 (see FIG. 7) of the rotor 1 to desorb organic solvent vapor, odorous components or moisture adsorbed on the rotor, Play the rotor.

In the above embodiments, the case where the honeycomb-shaped laminated body having the gas adsorbing property is the rotor has been described. However, a rectangular parallelepiped adsorption block 1a and a block-shaped honeycomb filter 11a shown in FIG. 6 are combined and treated. The same applies to the case where the cleaning or dehumidification of the air TA and the desorption with the regenerated air RA are alternately repeated.

[0015]

Since the present invention is configured as described above, dust and other other prefilters 8 which have passed through the gaps between the individual filters of the prefilter 8 disposed in the duct separately from the conventional filter, that is, the gas adsorber. Fine dust or oil mist that cannot be captured and removed by the honeycomb filter 11 of the present invention can be sufficiently captured and removed, and the small through holes of the filter can be used to form the honeycomb-shaped laminate 1.
By increasing the surface area per unit volume by making the size smaller than the small through-holes, or by configuring the filter with a sheet having an electrostatic charge, or by configuring the filter with a sheet having a fluffed surface, Alternatively, by using two or more of the above-mentioned means in combination, the filter has a large dust collecting property and is configured to easily catch the dust, so that the performance of the filter is further improved. It is possible to completely eliminate the disadvantage that fine particles such as dust adhere to and accumulate on the inlet end face of the gas and obstruct the air flow, making the gas adsorber unusable, and because it is a honeycomb filter, the air flow resistance or pressure loss. Is extremely small and has an effect of being about 1/20 to 1/5 of the flow resistance, that is, the pressure loss of the conventionally used sheet filter.

Of course, when the honeycomb adsorbent of the present invention is used, fine particles of dust adhere to and deposit on the end surface of the filter where the small through holes appear, as described above with reference to FIG. When it comes to the possibility that the air flow becomes poor and the performance of the honeycomb adsorbent deteriorates, the honeycomb filter can be replaced by a simple operation. It has the effect that it can be used continuously for a while.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of a honeycomb adsorbent of the present invention.

FIG. 2 is a cross-sectional view showing an example of a honeycomb filter.

FIG. 3 is a central vertical cross-sectional view showing a usage example of the honeycomb adsorbent of the present invention.

FIG. 4 is a perspective view showing another example of a honeycomb filter.

FIG. 5 is a central vertical cross-sectional view showing another example of use of the honeycomb adsorbent of the present invention.

FIG. 6 is a partially cutaway perspective view showing still another example of the honeycomb adsorbent of the present invention.

FIG. 7 is a partially cutaway perspective view showing a usage example of a conventional honeycomb adsorbent.

FIG. 8 is a central vertical sectional view showing an example of use of a conventional honeycomb adsorbent.

[Fig. 9] Fig. 9 is a cross-sectional view showing a state in which dust adheres and solidifies in the vicinity of an inlet end face of a small through hole by using a conventional honeycomb adsorbent.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb laminated body 5 Processing zone 6 Regeneration zone 9 Small through holes of honeycomb laminated body 10 Dust accumulation layer 11 Honeycomb filter

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area B03C 3/28

Claims (9)

[Claims] 1. A honeycomb-shaped laminate having a gas adsorbing property, which is formed by laminating to form a small through-hole having a shape that easily catches dust with a sheet having a high dust collecting property on an end surface where the small through-hole appears. A honeycomb adsorbent, which is equipped with a filter in close contact with or close to it. 2. The honeycomb adsorbent according to claim 1, wherein the filter is a filter provided with small through holes having a size smaller than the small through holes of the honeycomb laminate and having a large surface area per unit volume. 3. The honeycomb adsorbent according to claim 1, wherein the filter is a filter formed by laminating statically charged sheets. 4. The honeycomb adsorbent according to claim 1, wherein the filter is a filter in which sheets having a fluffy surface are laminated. 5. The honeycomb adsorbent according to claim 1, wherein the filter is a filter in which sheets using activated carbon fibers or fine particles are laminated. 6. The honeycomb adsorbent according to claim 1, wherein the filter is a honeycomb filter formed by alternately laminating flat sheets and corrugated sheets. 7. The honeycomb adsorbent according to claim 1, wherein the filter is a filter formed by laminating sheets with a spacer interposed therebetween. 8. The honeycomb adsorbent according to claim 1, wherein the honeycomb laminate has an organic solvent vapor adsorption performance. 9. The honeycomb adsorbent according to claim 1, wherein the honeycomb laminate has dehumidifying performance.