JP2016175028A - Volatile organic compound treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic compound treatment apparatus where a volatile organic compound A is adsorbed by an adsorbent in an adsorption tower 11, desorbed by supplying steam F for desorption and incinerated in a combustion furnace 40 and which can maintain sufficient treatment capacity while reducing an installation area.SOLUTION: An adsorbent storage portion 12 has: at least two surfaces of perforated plates which may be oblique side surfaces; a bottom surface which is made of a closing plate without holes and which may face an oblique direction at a lower side; a lower turning around region 23 coupling from a region lower than the adsorbent storage portion 12 and contacting one perforated plate 21 becoming a side surface; and an upper turning around region 24 coupling from a region upper than the adsorbent storage portion 12 and contacting the other perforated plate 20 becoming the other side surface. The upper turning around region 24 and the lower turning around region 23 are relatively faced. Passing between the upper turning around region 24 and the lower turning around region 23 can be achieved only by a route via both perforated plates.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for treating a volatile organic compound from a gas before discharging the gas containing the volatile organic compound.

  Exhaust gas generated from factories may contain volatile organic compounds that cause problems if discharged into the atmosphere as they are. In this case, before exhaust gas is discharged into the atmosphere, the contained volatile organic compounds must be treated. As a method for this, a volatile organic compound contained in exhaust gas is adsorbed on an adsorbent in an adsorption tower containing an adsorbent such as activated carbon, and the concentration in the gas is reduced and discharged to the atmosphere. Thereafter, an adsorption / desorption method is generally used in which water vapor is introduced into the adsorption tower to desorb the volatile organic compound from the adsorbent so that the adsorption tower can be reused and the volatile organic compound is treated. A plurality of adsorption towers are provided, and a continuous operation is performed by performing a desorption process in the other adsorption tower at the same time while performing an adsorption process in one adsorption tower. In addition, the desorbed volatile organic compound is burned, and the heat of combustion is used to assist the generation of desorption water vapor.

  As for the treatment capacity of this adsorption tower, the larger the cross-sectional area with respect to the permeation direction of the exhaust gas, the better the adsorption efficiency in the adsorption process. In an adsorption tower that is often cylindrical or columnar, the adsorbent is introduced as an adsorption layer having a sufficient length in the vertical direction in the tower (for example, Patent Document 1). In order to improve the gas passage area with such an adsorption tower, the installation area of the adsorption tower itself must be increased. However, if the installation area expands, it will take up extra space in the factory. Therefore, it is desirable that the installation area be as small as possible.

  On the other hand, an adsorption tower having a shape as in Patent Document 2 has been proposed. An adsorption layer casing that penetrates the adsorption tower obliquely at a predetermined inclination angle is arranged so that the adsorbent can be supplied from the upper part outside the adsorption tower and discharged from the lower part outside the adsorption tower. With such an inclined adsorption layer, the processing capacity can be improved by expanding the cross-sectional area in the gas permeation direction rather than the horizontal cross-sectional area of the adsorption tower. Moreover, replenishment and exchange of the adsorbent in the adsorption layer can be easily performed from outside the tower.

JP 2013-086018 A Japanese Patent Laid-Open No. 11-47534

  By the way, the adsorbent gradually cracks while repeating adsorption and desorption, and a part of the adsorbent becomes powdery and falls to the bottom side of the adsorption layer. Thus, the bulk of each adsorbent gradually decreases, and the apparent volume of the adsorbed layer clogged with the adsorbent decreases with repeated use.

  In the case of a conventional adsorption tower having a non-tilted vertical adsorption layer, even if the apparent volume of the adsorption layer is somewhat reduced, the decrease in adsorption capacity is negligible. However, in an adsorption tower having a simply inclined adsorption layer, a path (short path) through which exhaust gas and desorbed water vapor can pass without passing through the adsorption layer is formed near the upper end of the adsorption layer. In order to prevent this, the adsorption tower of Patent Document 2 can keep the apparent volume of the adsorption layer by extending the adsorption layer to the outside of the adsorption tower and adding an adsorbent from the outside of the tower. However, the adsorbing layer of Patent Document 2 has a problem that the adsorbent replenishment path protrudes outside the adsorbing tower, resulting in a larger size than the adsorbing tower having the horizontal adsorbing layer.

  Therefore, an object of the present invention is to improve the treatment capacity of the adsorption device while suppressing the installation area of the volatile organic compound treatment device.

This invention
An adsorbing device that has an adsorbent accommodating portion filled therein with an adsorbent that adsorbs a volatile organic compound, and that can be supplied with desorption water vapor that contacts the water vapor and desorbs the volatile organic compound from the adsorbent accommodating portion. The
Above the adsorbent container, it has a volatile organic compound-containing gas inlet and a water vapor outlet,
Below the adsorbent container, it has a post-treatment gas outlet and a water vapor supply port,

The adsorbent accommodating part has at least two perforated plates provided with a plurality of holes through which gas permeates and does not allow the adsorbent to pass. The perforated plates may be inclined and do not have the holes. It has a bottom surface on the lower side that may consist of a blocking plate and may face in an oblique direction,
Connected from the area below the adsorbent accommodating part, and has a lower entrainment area in contact with one porous plate that becomes the side surface of the adsorbent accommodating part,
Connected from the area above the adsorbent accommodating part, and has an upper wrapping area in contact with another perforated plate which is another side of the adsorbent accommodating part,
The upper wrapping area and the lower wrapping area are opposite to each other,
Gas can pass only from the lower entrainment region to the upper entrainment region through a route passing through both of the perforated plates, and
The above-described problem has been solved by allowing gas to pass from the upper entraining region to the lower entraining region only through the path passing through both of the perforated plates.

  When the volatile organic compound-containing gas to be processed is supplied to the adsorption device from above, the gas flows from the area above the adsorbent accommodating section to one side surface of the adsorbent accommodating section by the upper wrapping area, and the side surface The perforated plate that forms a wide cross section that improves the processing efficiency, so that the adsorption process can be performed efficiently. On the other hand, the adsorbent accommodating portion stores the upper surface to the bottom surface in the adsorption device, and the adsorbent cannot be exchanged from the outside, but does not protrude outside the device as in Patent Document 2, so the installation area is small. Can be left.

  The side perforated plate constituting the adsorbent accommodating portion may be set up in the vertical direction, but as the inclined surface attached to the perforated plate with an inclination, the lower entrainment region is narrower toward the upper side, and the upper circuit It is more preferable to make the entrainment region narrower toward the lower side because the amount of exhaust gas and water vapor entering the adsorbent accommodating portion is less likely to be biased in the vertical direction.

The following examples are given as specific forms in which the adsorbent accommodating portion is an inclined surface.
In the first embodiment, the vertical cross-sectional shape is V-shaped, that is, the adsorbent accommodating portion has two parts that are line-symmetric with respect to the longitudinal cross-sectional center line of the adsorption device, and the upper part of the part The interval between the upper side surfaces that are the side surfaces in contact with the entrainment region is wide at the top and narrow at the bottom, and the lower side surface that is the side surface in contact with the lower entrainment region at the site is the longitudinal section of the adsorption device. The shape is such that the upper wall approaches the wall surfaces at opposite ends via the center line, and the lower wall is further away.

  In this embodiment, an embodiment in which a plurality of the adsorbent accommodating portions formed of a plurality of portions are connected in the lateral direction so that side surfaces inclined so as to expand further may be alternated may be used. For example, an embodiment in which the vertical cross-sectional shape is composed of three parts and the italic N-shape is formed, or an embodiment in which the vertical cross-sectional shape is composed of four parts and is W-shaped, and the side surfaces further inclined to these are staggered. Embodiment may be sufficient.

In another embodiment, the upper wrap region is an inverted quadrangular pyramid that is arranged at the center of the adsorption device and has a lower portion as a vertex.
The lower side surface, which is the side surface in contact with the lower entrainment region of the adsorbent accommodating portion, has a shape that is an inverted quadrangular pyramid shape.

Yet another embodiment is a conical shape in which the upper wrapping region is arranged at the center of the adsorption device, and the lower part is a vertex.
A lower side surface, which is a side surface in contact with the lower entrainment region of the adsorbent accommodating portion, has a shape that is an inverted frustoconical shape.

  However, in the above-described form in which the gas escapes between the facing side surfaces, if there is a region not filled with the adsorbent in the upper part of the adsorbent accommodating portion, from one porous plate to another porous plate, There is a case where a short path that can pass without contacting the adsorbent is formed. On the other hand, regardless of whether the side surface is inclined, the porous plate on the side in contact with the upper wrapping region protrudes from the upper end of the porous plate on the lower wrapping region side, and the adsorbent If a sufficiently large amount of adsorbent is filled in the accommodating portion, it is possible to prevent a short pass from occurring.

  Furthermore, if a main lid is placed on the upper surface of the adsorbent in the adsorbent container, it will escape upward when exhaust gas or steam passes between one porous plate and another porous plate. Can be suppressed. It is preferable that the main lid covers the entire upper surface of the adsorbent, but the horizontal cross-sectional shape of the adsorbent container is not constant due to the inclination of the side surface and the connection with the mounting portion on the apparatus wall surface. When the apparent volume decreases and the position of the upper surface decreases, it may be difficult to cover the entire surface with a single main lid. In this case, in addition to the main lid, a sub lid smaller than the main lid, which can cover the gap between the outer wall of the main lid and the apparatus wall surface, may be placed. Furthermore, if the main lid has an edge wall at the edge on at least the upper wrapping region side and bites downward into the upper surface of the adsorbent, the main lid and the adsorbent are caused by unevenness generated on the upper surface of the adsorbent. Even if there is a gap between the water vapor and the edge wall, it is possible to prevent the water vapor from flowing upward through the short path.

  According to the present invention, it is possible to improve the processing capability of the volatile organic compound processing apparatus while suppressing the expansion of the installation area. Further, even if irregularities occur on the upper surface of the adsorbent due to repeated adsorption and desorption, the reliability of adsorption and desorption by the adsorbent can be improved without forming a short path.

Configuration example of an organic compound adsorption device according to the present invention (A) Vertical sectional view of the adsorbing device in which the adsorbent accommodating portion according to the first embodiment has a V-shaped vertical section, (b) Horizontal sectional view seen from above the device of (a), (c) ( a) Horizontal sectional view from the bottom of the device in a) (A) The block diagram which shows the example of the cover body of the adsorption | suction apparatus concerning 1st embodiment (A) Plan view of the upper surface where the main lid and the sub lid are arranged, (b) Plan view when the arrangement is shifted from (a) (A) Perspective perspective view of the vicinity of the adsorbent accommodating portion of the adsorbing device in which the adsorbent accommodating portion according to the second embodiment has an inverted quadrangular pyramid shape, (b) a vertical sectional view of the device of (a), (c) (A) Horizontal sectional view seen from above the device, (d) Horizontal sectional view seen from below the device (a) (A) Perspective perspective view of the vicinity of the adsorbent accommodating portion of the adsorbing device in which the adsorbent accommodating portion according to the third embodiment has an inverted conical shape, (b) a vertical sectional view of the device of (a), (c) ( The horizontal sectional view seen from the upper part of the apparatus of a), (d) The horizontal sectional view seen from the lower part of the apparatus of (a) Vertical sectional view of an adsorption device having a vertical adsorbent accommodating portion according to a fourth embodiment Vertical sectional view of an adsorption device having a single inclined adsorbent accommodating portion according to a fifth embodiment (A) The top view of the adsorption | suction apparatus whose adsorption agent accommodating part concerning 6th embodiment is a vertical cross-section italic N shape, (b) The vertical sectional view of the apparatus of (a), (c) The apparatus of (a) Bottom view of (A) The top view of the adsorption | suction apparatus whose adsorption agent accommodating part concerning 7th embodiment is a vertical cross-section W shape, (b) The vertical sectional view of the apparatus of (a), (c) Of the apparatus of (a) Bottom view

  Embodiments of the present invention will be described below. The present invention relates to an organic compound adsorbing device 11 that reduces the concentration of a volatile organic compound-containing gas so that it can be discharged into the atmosphere, and adsorbs the corresponding volatile organic compound to an adsorbent. The volatile organic compound adsorbed by the adsorption device 11 can be desorbed from the adsorbent by being brought into contact with heated water vapor, and the adsorbent and the adsorption device can be repeatedly used. The desorbed volatile organic compound is recovered and used as a fuel for obtaining heated steam. FIG. 1 shows an example of an overall image of a volatile organic compound processing apparatus that performs a series of these cycles.

  The volatile organic compound to be treated by the adsorption apparatus and the treatment apparatus according to the present invention is an organic compound that can be turned into a gas when heated at normal pressure, and particularly, a liquid that is liquid at room temperature is easily adsorbed. Examples thereof include hydrocarbon solvents such as alcohols having about 1 to 8 carbon atoms such as methanol, ethanol and isopropyl alcohol, and aromatic organic compounds such as toluene and benzene.

  A volatile organic compound processing apparatus including a series of circulation systems includes one or a plurality of adsorption apparatuses 11 according to the present invention, a combustion furnace 40, a heat exchanger 41, and piping connecting them. In FIG. 1, a configuration having two adsorption devices 11 (11a, 11b) is shown as an example.

  Each adsorbing device 11 is rectangular or cylindrical, and an adsorbent containing portion 12 filled with an adsorbent that adsorbs a volatile organic compound and can be desorbed by heating is provided inside the device. As this adsorbent, granular activated carbon can be used. In order to pass through the inside of the adsorbing device 11 in the vertical direction, the adsorbent accommodating portion 12 must be passed. Both the bottom surface and the top surface of the adsorbent container 12 are stored in the adsorption device 11.

  An inlet 17 (17a, 17b) for the volatile organic compound-containing gas A is provided on the upper end side of the adsorbent accommodating portion 12 of the adsorption device 11, and a volatile organic compound is provided on the lower end side of the adsorbent accommodating portion 12. A post-treatment gas B outlet 18 (18a, 18b) is provided in which the concentration of the compound is reduced by adsorption to the adsorbent. The discharge port 18 discharges into the atmosphere.

  Further, a water vapor supply port 25 (25a, 25b) for the desorption water vapor F is provided below the lower end of the adsorbent accommodating portion 12 of the adsorption device 11. Further, a water vapor outlet 26 (26 a, 26 b) for extracting the vapor organic compound accompanying gas K from which the organic compound has been desorbed is provided on the upper end side of the upper end of the adsorbent accommodating portion 12. The steam organic compound entrained gas K is transported through the entrained gas delivery path 19 that leads from the steam outlet 26 to the combustion furnace 40.

  Further, drain outlets 27 (27a, 27b) for extracting the generated drain are provided in the vicinity of the bottom of the adsorption device 11 below the lower end of the adsorbent accommodating portion 12 of the adsorption device 11. Further, a drain pipe 28 for feeding the drain that has escaped from the drain outlet 27 to the drain storage device 29 is provided.

  A description will be given of an embodiment of the adsorption device 11 according to the present invention. The example shown in FIGS. 1 and 2 is an embodiment in which the shape of the adsorbent accommodating portion in the vertical sectional view of the adsorbent accommodating portion 12 is V-shaped (as shown in FIG. 2A).

  Each adsorbent accommodating portion 12 includes at least two perforated plates 20 and 21 each having a large number of holes that pass water vapor and volatile organic compound-containing gas and do not allow individual particles of the adsorbent to pass therethrough. Have on the surface. As this perforated plate, for example, a punching metal can be used. These two surfaces are arranged on the side surfaces that may face obliquely. In addition, a closing plate which does not have a hole and does not allow gas to pass through is disposed on the bottom surface 22 on the lower side which may be inclined. On the other hand, on the upper surface opposite to the bottom surface 22, a lid body 30 made of a blocking plate that does not have a hole and does not allow gas to pass therethrough is placed.

  The adsorbing device 11 according to the present invention is connected to a region below the adsorbent accommodating portion 12, that is, from the discharge port 18 or the water vapor supply port 25 side, and is in contact with one porous plate 21 that is the side surface of the adsorbent accommodating portion 12. It has a lower entrainment region 23 where gas can wrap around. Moreover, it has the upper surrounding area | region 24 which is connected from the area | region above the adsorption agent accommodating part 12, ie, the inlet 17 or the water vapor outlet 26 side, and contact | connects the other porous plate 20 used as another side surface of the adsorption agent accommodating part 12. . The lower entrainment region 23 and the upper entrainment region 24 are opposed to each other with the adsorbent accommodating portion 12 in between, and in order for gas such as water vapor and volatile organic compound-containing gas to escape from one to the other, adsorbent accommodation Must pass through part 12.

  Such a form of the adsorption device 11 can take various forms as listed below. First, the first embodiment will be described with reference to FIG. 2 (a) is a vertical sectional view, FIG. 2 (b) is a horizontal sectional view looking down from a section slightly above the adsorbent accommodating portion 12, and FIG. 2 (c) is slightly below the adsorbent accommodating portion 12. The horizontal sectional view looked up from the cross section is shown. In the first embodiment, the perforated plates 20 and 21 constituting the side surfaces are both inclined surfaces. As a result, the lower wrap region 23 is narrower toward the upper end, and the upper wrap region 24 is narrower toward the lower end.

  The adsorbent accommodating portion 12 includes two portions that are plane-symmetric with respect to the longitudinal plane center plane P of the adsorption device 11. The space between the perforated plates 20 and 20 on the upper side, which is the side in contact with the upper wrapping region 24 of these parts, is wide at the top and narrow at the bottom, and is joined at the bottom end reaching the bottom surface 22. . That is, the bottom surfaces 22 and 22 are in contact with each other on one side. The bottom surface 22 is directed obliquely downward from the joint side toward the both end wall surfaces 13 of the suction device 11.

  On the other hand, the perforated plates 21 and 21 on the lower side, which is the side in contact with the lower entrainment region 23 of these parts, are opposed to both end wall surfaces 13 and 13 facing each other through the longitudinal cross-section center plane P of the adsorption device. The lower part is closer to the lower part, the upper part is closer to the upper part, and the upper end closing part 14 at the upper end is joined to the both end wall surfaces 13.

  These perforated plates 20 and 21 rise vertically from the bottom surface 22. The inclination angle of the bottom surface 22 from the horizontal plane and the inclination angle of the perforated plates 20 and 21 from the vertical direction are preferably 45 degrees or less. If it exceeds 45 degrees, it will spread too much, and unless the installation area of the adsorption device 11 is excessively widened, the processing cross-sectional area cannot be secured.

  The upper end of the porous plate 20 on the upper side surface is extended further upward than the upper end portion where the lower side porous plate 21 is in contact with the wall surfaces 13 at both ends (upper porous plate extension portion 36), and the adsorbent accordingly. 31 can be filled in a bulky manner above the upper end of the porous plate 21 on the lower side surface. As a result, even if the apparent volume of adsorbent 31 is slightly reduced by adsorption and desorption, it is possible to prevent the porous plate 21 on the lower side surface from being exposed in the upper region and causing a short path. By then, the adsorbent 31 may be appropriately replenished.

  When this structure is viewed from a longitudinal section orthogonal to the longitudinal section center plane P, the section has a V-shape as shown in FIG.

  The gas flow when the volatile organic compound-containing gas A is processed by the adsorption device 11 according to this embodiment is as follows. The volatile organic compound-containing gas A introduced from the upper introduction port 17 is blocked by the lid body 30 that covers the upper surface of the adsorbent container 12 and concentrates in the upper entrainment region 24. It is introduced into the adsorbent accommodating part 12 through the perforated plate 20 which is the upper side surface along the upper wrapping region 24. The volatile organic compound-containing gas A can be introduced from the entire area of the porous plate 20 because the pressure loss of the adsorbent accommodating portion 12 does not substantially change regardless of where the porous plate 20 comes into contact with the upper entrainment region 24. At this time, the cross-sectional area on which the processing capacity of the adsorption by the adsorbent depends is the area of the two porous plates 20 and 20. Therefore, if the adsorbent container 12 has a sufficient height, the adsorption process can be executed with a cross-sectional area sufficiently wider than the horizontal cross-sectional area of the adsorption device 11. The interval between the opposed porous plates 20 and 21 is secured so that the volatile organic compound-containing gas A can contact with a sufficient amount of the adsorbent. The treated gas B after the volatile organic compound is adsorbed by the adsorbent passes through the perforated plate 21 on the lower side surface to the lower entrainment region 23 and is discharged from the discharge port 18.

  The flow of the desorption water vapor F at the time of desorption after adsorption is as follows. Since the desorption water vapor F supplied from the lower water vapor supply port 25 cannot enter the adsorbent accommodating portion 12 from the bottom surface 22, it is divided into left and right in FIG. 21 enters the adsorbent accommodating portion 12. As for the lower entrainment region 23, the pressure loss of the adsorbent accommodating portion 12 is almost the same regardless of where it enters the porous plate 21 in contact therewith, so that the desorption water vapor F is supplied from the entire area of the porous plate 21. Can do. The desorption water vapor F desorbs the volatile organic compound adsorbed by the adsorbent and becomes water vapor accompanied by the volatile organic compound. Since the upper surface of the adsorbent accommodating portion 12 is blocked by the lid body 30 and the bottom surface 22 is also inclined, the desorption proceeds evenly as a whole. The steam organic compound-entrained gas K passes through the perforated plate 20 on the upper side surface to the upper circulation region 24 and is discharged from the steam outlet 26.

  The behavior of the desorption water vapor F near the lid 30 will be described. A vertical sectional view of the vicinity of the upper surface of the adsorbent accommodating portion 12 is shown in FIG. The adsorbent container 12 is filled with granular activated carbon as the adsorbent 31, and the lid 30 is placed on the surface so that the upper surface is substantially horizontal. The lid body 30 includes a main lid 32 made of a plate having substantially the same shape and the same size as the upper surface of the adsorbent accommodating portion 12 as a main component, and may include sub lids 34 and 35 to be described later. Although the upper surface of the adsorbent 31 is leveled and operated substantially horizontally, it is inevitable that fine irregularities will be produced no matter how much the level is. Therefore, a gap is inevitably generated between the upper surface of the adsorbent 31 and the main lid 32. Since the desorption water vapor F has a warm and upward property, the water vapor easily reaches the main lid 32, and the short path S through which the desorption water vapor F passes through the region with little contact with the adsorbent due to this gap. Will be formed. Therefore, an edge wall 33 that extends downward and bites into the upper surface of the adsorbent 31 is provided at the edge of at least the upper side surface of the main lid 32 on the porous plate 20 side. As a result, the desorption water vapor F that tends to escape upward is blocked and must pass through the adsorbent 31, so that the desorption easily proceeds. The edge wall 33 is desirably provided on at least one edge of the main lid 32, more desirably on three sides, and even more desirably on four sides.

  By the way, the upper side perforated plate 20 has an upper perforated plate extension portion 36 that has an inclination and is extended to a position higher than the upper end closing portion 14 at the upper end of the lower side perforated plate 21. The area of the upper surface of the adsorbent accommodating portion 12 formed between the both end wall surfaces 13 of the adsorption device 11 increases as it reaches the height position of the upper end closing portion 14. Even if the adsorbent is reduced and the main lid 32 is tilted or displaced, the main lid 32 so that the sub lid 34 and the second sub lid 35 cover the gap between the edge of the main lid 32 and the periphery. The sub lids 34 and 35 that cover the gap between the edge and the wall surface of the adsorption device 11 are installed as shown in FIG. Note that the sub lid 34 and the second sub lid 35 may be shifted from the main lid 32 as shown in FIG.

  Next, 2nd embodiment of the adsorption | suction apparatus concerning this invention is described using FIG. 5 (a) is a perspective perspective view, FIG. 5 (b) is a vertical sectional view, FIG. 5 (c) is a horizontal sectional view looking down from a section slightly above the adsorbent accommodating portion 72, and FIG. FIG. 5 is a horizontal cross-sectional view looking up from a cross section slightly below the agent container 72. In these drawings, the volatile organic compound-containing gas introduction port 17, the treated gas discharge port 18, the water vapor supply port 25, the water vapor supply port 26, the drain discharge port 27, and the like at the upper and lower ends of the apparatus are abbreviated. However, in the actual embodiment, these are provided similarly to the embodiment shown in FIG. The same applies to other embodiments described below.

  The adsorbing device 71 has a square shape and a horizontal cross section that is square. The adsorbent container 72 has a shape in which the center of the inverted quadrangular pyramid is hollowed out by the inverted quadrangular pyramid. That is, four inclined triangular perforated plates 73 serve as the upper side surface of the adsorbent accommodating portion 72, are connected from the region above the adsorbent accommodating portion 72, are arranged at the center of the adsorbing device 71, and the lower portion is the apex. An inverted quadrangular pyramid upper wrap region 76 is formed. Each of the perforated plates 73 has an upper perforated plate extension 83 protruding upward from the upper end of the other perforated plate 74. On the other hand, the four perforated plates 74 each having an inclined trapezoid form a lower side surface of the adsorbent accommodating portion 72 having an inverted quadrangular pyramid shape, which is inclined from the four apparatus wall surfaces 78 toward the lower center of the apparatus. A lower wrapping area 77 is formed between the apparatus wall surface 78 and the apparatus wall surface 78. The bottom surface 75 has a triangular pyramid shape formed by combining triangular blocking plates having no holes, and is joined to the bottom side of the perforated plate 74.

  The lid 79 used in the adsorbing device 71 is preferably composed of four rectangular plates that cover the four sides of the upper surface, and can be appropriately displaced in accordance with the inclination and enlargement of the upper surface of the adsorbent.

  Next, a third embodiment of the adsorption device according to the present invention will be described with reference to FIG. 6 (a) is a perspective perspective view, FIG. 6 (b) is a vertical sectional view, FIG. 6 (c) is a horizontal sectional view looking down from a section slightly above the adsorbent accommodating portion 92, and FIG. 6 (d) is an adsorption. FIG. 6 is a horizontal cross-sectional view looking up from a slightly lower cross-section than the agent container 92.

  This adsorption device 91 is cylindrical and has a circular horizontal cross section. The adsorbent accommodating portion 92 has a shape in which the center of the inverted truncated cone is cut out by the inverted cone. That is, the perforated plate 93 having an integral conical side surface is the upper side surface of the adsorbent accommodating portion 92, is connected from a region above the adsorbent accommodating portion 92, is arranged at the center of the adsorbing device 91, and is an inverted cone having the lower portion as a vertex. An upper wrap-around area 96 is formed. The perforated plate 93 has an upper perforated plate extension 103 protruding upward from the upper end of the other perforated plate 94. On the other hand, a perforated plate 94 having a reverse frustoconical side surface forms a lower side surface of the adsorbent accommodating portion 92 having an inverted frustoconical shape inclined from the cylindrical device wall surface 98 toward the lower center of the device, and serves as an adsorbent accommodating portion. A lower entrainment region 97 is formed between the region 92 and the device wall surface 98. The bottom surface 95 is an upward conical circumferential surface.

  The lid 99 used in the suction device 91 is not particularly limited, and an annular one over the entire circumference or a plurality of fan-shaped parts arranged in a circumferential direction so as to overlap each other can be used.

  Next, a fourth embodiment of the adsorption device according to the present invention will be described with reference to the vertical sectional view of FIG. In the adsorption device 111 according to this embodiment, the perforated plates 113 and 114 which are the side surfaces of the adsorbent accommodating portion 112 do not have an inclination and are set up in the vertical direction. The bottom surface 115 is horizontal. The upper wrapping region 116 connected to the region above the adsorbent accommodating portion 112 continues from the bottom surface 115 to the lower wall surface fixing portion 122 extending to the device wall surface 118 at the same interval. On the other hand, the lower entrainment region 117 connected to the region below the adsorbent accommodating portion 112 continues at the same interval from the upper end of the porous plate 114 to the upper wall surface fixing portion 121 extending to the device wall surface 118. The perforated plate 114 on the upper wrapping region 116 side has an upper perforated plate extension 123 protruding upward from the upper end of the other perforated plate 114. On the upper surface of the adsorbent accommodating portion 112, a lid body 119 straddling the upper end of the porous plate 114 is placed to prevent the formation of a short path.

  Next, a fifth embodiment of the adsorption apparatus according to the present invention will be described with reference to the vertical sectional view of FIG. The adsorption device 131 according to this embodiment corresponds to only one side of the adsorbent accommodating portion 132 that forms a pair with a V-shaped cross section according to the first embodiment. That is, it can be used as a device having a smaller installation area than the adsorption device 11 according to the first embodiment. The adsorbent accommodating portion 132 is only an inclined box-shaped integral. The upper turning-in area 136 connected to the area above the adsorbent accommodating part 132 becomes narrower in the lower part and reaches the lower wall surface fixing part 142 extending to the apparatus wall surface 138. The lower wall surface fixing portion 142 is joined to a joint portion between the inclined bottom surface 135 and the perforated plate 133 which is the upper side surface. The perforated plate 133 which is the upper side surface forming the upper entrainment region 136 has an upper perforated plate extension 143 protruding upward from the upper end of the other perforated plate 134. On the other hand, the lower entrainment region 137 connected to the region below the adsorbent accommodating portion 132 becomes more constricted and reaches the upper wall surface fixing portion 141 extending from the device wall surface 138. The upper wall surface fixing portion 141 is joined to the upper end of the porous plate 134 that is the lower side surface. Moreover, the lid body 139 placed on the adsorbent accommodating part 132 has the same structure as that of the first embodiment.

  Next, a sixth embodiment of the adsorption device according to the present invention will be described with reference to a plan view of FIG. 9A, a vertical sectional view of FIG. 9B, and a bottom view of FIG. In the adsorption device 151 according to this embodiment, the adsorbent accommodating portion 152 is composed of three parts. The adsorbent accommodating portions 152a, 152b, and 153c, which are three portions, are combined so as to be connected in the horizontal direction so that the shape of the vertical cross section is an italic N-shape. The adsorbent accommodating portion 152a and the adsorbent accommodating portion 152b are connected at the adjacent upper end, and the adsorbent accommodating portion 152b and the adsorbent accommodating portion 152c are connected at the adjacent lower end. That is, the inclined surfaces constituting the respective adsorbent accommodating portions 152 are staggered from the inclined surfaces of the adsorbent accommodating portions 152 adjacent to each other. In other words, the pair of adsorbent accommodating portions 152 (152a and 152b, 152b and 152c) is arranged to be plane-symmetric with respect to the joint vertical section Q, which is a vertical section including the joint lines connected to each other. The lower end portion of the adsorbent accommodating portion 152a is fixed to the apparatus wall surface 158 as a lower wall surface fixing portion 162. The upper side end portion of the adsorbent accommodating portion 152c is fixed to the apparatus wall surface 158 as the upper wall surface fixing portion 161. In addition, the perforated plates 153a to 153c and the bottom surfaces 155a to 155c of the adsorbent accommodating portions 152a to 152c are fixed to the device wall surface 158 as shown in FIG. To do. However, it is preferable to weld the portion to be fixed to the wall surface so as not to create a gap through which gas can pass in the vertical direction.

  Each of the adsorbent accommodating portions 152a to 152c is composed of perforated plates 153a to 153c whose upper side surfaces are inclined, and perforated plates 154a to 154c whose lower side surfaces are inclined. The bottom surfaces 155a to 155c are blocking plates as in the first embodiment.

  The adsorbent accommodating portion 152a and the adsorbent accommodating portion 152b may be integrally connected above the joint portion between the porous plate 154a and the porous plate 154b. In any of the adsorbent accommodating portions 152a to 152c, the upper surface of the filled adsorbent is covered with lids 159a to 159c. Although abbreviated in the figure, it is desirable that each lid body has a sub lid. The lids 159a and 159b placed on the adsorbent accommodating portion 152a and the adsorbent accommodating portion 152b may be placed so that the main lids partially overlap each other. A single cover that covers the adsorbent accommodating portion 152a and the adsorbent accommodating portion 152b may be placed.

  In this embodiment, the upper and lower wrap-around areas are divided into two locations. That is, the upper wrapping region is composed of upper wrapping regions 156 a and 156 b connected to the region above the adsorbent accommodating portion 152. The upper wrap-around region 156a is a region sandwiched between the device wall surface 158 and the inclined perforated plate 153a that becomes the upper side surface of the adsorbent accommodating portion 152a. The upper wrap-around region 156b is a region sandwiched between the inclined porous plate 153b serving as the upper side surface of the adsorbent containing portion 152b and the inclined porous plate 153c serving as the upper side surface of the adsorbent containing portion 152c. Although both are narrower toward the bottom, the volatile organic compound-containing gas A can be introduced into the adsorbent from the entire surface of the porous plate 153.

  On the other hand, the lower entrainment area includes lower entrainment areas 157a and 157b connected to an area below the adsorbent accommodating portion 152. The lower entrainment region 157a is a region sandwiched between the inclined perforated plate 154a serving as the lower side surface of the adsorbent containing portion 152a and the inclined perforated plate 154b serving as the lower side surface of the adsorbent containing portion 152b. The lower entrainment region 157b is a region sandwiched between the inclined perforated plate 154c and the device wall surface 158, which are the lower side surface of the adsorbent accommodating portion 152c. Although both are narrower toward the top, the desorption water vapor F can be introduced into the adsorbent from the entire surface of the porous plate 154.

  Next, a seventh embodiment of the adsorption device according to the present invention will be described with reference to a plan view of FIG. 10A, a vertical sectional view of FIG. 10B, and a bottom view of FIG. In the adsorption device 171 according to this embodiment, the adsorbent accommodating portion 172 includes four parts. The adsorbent accommodating portions 172a, 172b, 172c, and 172d, which are the four portions, are combined so as to be connected in the horizontal direction so that the shape of the vertical cross section becomes W-shaped. The adsorbent accommodating portion 172a and the adsorbent accommodating portion 172b are connected at the adjacent lower end, and the adsorbent accommodating portion 172b and the adsorbent accommodating portion 172c are connected at the adjacent upper end, and the adsorbent accommodating portion. 172c and adsorbent accommodating part 172d are connected at the adjacent lower end. That is, the inclined surfaces constituting the respective adsorbent accommodating portions 172 are staggered from the inclined surfaces of the adsorbent accommodating portions 172 adjacent to each other. In other words, the pair of adsorbent accommodating portions 172 (172a and 172b, 172b and 172c, and 172c and 172d) are plane-symmetric with respect to the joint vertical section Q, which is a vertical section including the joint lines that are connected. Be placed. The upper end portion of the adsorbent accommodating portion 172a is fixed to the apparatus wall surface 178 as an upper wall surface fixing portion 181a. The upper end portion of the adsorbent accommodating portion 172d is fixed to the apparatus wall surface 158 as an upper wall surface fixing portion 181b. In addition, the perforated plates 173a to 173d and the bottom surfaces 175a to 175d of the adsorbent accommodating portions 172a to 172d are fixed to the device wall surface 158 as shown in FIG. To do. However, it is preferable to weld the portion to be fixed to the wall surface so as not to create a gap through which gas can pass in the vertical direction.

  Each of the adsorbent accommodating portions 172a to 172d is composed of porous plates 173a to 173d whose upper side surfaces are inclined, and porous plates 174a to 174d whose lower side surfaces are inclined. The bottom surfaces 175a to 175d are blocking plates as in the first embodiment.

  The adsorbent accommodating portion 172b and the adsorbent accommodating portion 172c may be integrated above the joint portion between the porous plate 174b and the porous plate 174c. In any of the adsorbent accommodating portions 172a to 172d, the upper surface of the filled adsorbent is covered with lids 179a to 179d. Although abbreviated in the figure, it is desirable that each lid body has a sub lid. The lids 179b and 179c placed on the adsorbent accommodating portion 172b and the adsorbent accommodating portion 172c may be placed so that the main lids partially overlap each other. A single lid that covers the adsorbent container 172b and the adsorbent container 172c may be placed.

  In this embodiment, the upper wrapping area is divided into two places and the lower wrapping area is divided into three places. That is, the upper wrapping region is composed of upper wrapping regions 176 a and 176 b connected to the region above the adsorbent accommodating portion 172. The upper wrap-around region 176a is a region sandwiched between an inclined porous plate 173a serving as an upper side surface of the adsorbent accommodating portion 172a and an inclined porous plate 173b serving as an upper side surface of the adsorbent accommodating portion 172b. The upper wrap-around region 176b is a region sandwiched between the inclined porous plate 173c that becomes the upper side surface of the adsorbent accommodating portion 172c and the inclined porous plate 173d that becomes the upper side surface of the adsorbent accommodating portion 172d. Although both are narrower toward the bottom, the volatile organic compound-containing gas A can be introduced into the adsorbent from the entire surface of the porous plate 173.

  On the other hand, the lower entrainment area is composed of lower entrainment areas 177a, 177b, and 177c connected to an area below the adsorbent accommodating portion 172. The lower entrainment region 177a is a region sandwiched between the apparatus wall surface 178 and the inclined perforated plate 174a that becomes the lower side surface of the adsorbent accommodating portion 172a. The lower entrainment region 177b is a region sandwiched between the inclined perforated plate 174b serving as the lower side surface of the adsorbent containing portion 172b and the inclined perforated plate 174c serving as the lower side surface of the adsorbent containing portion 172c. The lower entrainment region 177c is a region sandwiched between the inclined perforated plate 174d and the device wall surface 178 which are the lower side surface of the adsorbent accommodating portion 172d. Although both are narrower toward the upper side, the desorption water vapor F can be introduced into the adsorbent from the entire surface of the porous plate 174.

  As an application example of this embodiment, an embodiment having an inverted W-shaped cross section in which the positions of the inclined surface and the joint portion are reversed may be used. Further, as another form, two adsorbent accommodating portions connected in a V-shaped cross section are further provided in one or a plurality of pairs in the lateral direction in FIGS. 9 and 10 (perpendicular to the junction vertical cross section Q). (Direction) may be used. Adjacent adsorbent accommodating portions may be joined via a metal plate or the like with a slight gap left and right. In this case, the gap between the adsorbent accommodating portions is closed by a metal plate or the like used for joining, and prevents the gas from passing in the vertical direction without passing through the adsorbent accommodating portion.

  In any of the above-described embodiments, the processing apparatus 10 that performs processing of a volatile organic compound using the adsorption apparatuses 11, 71, 91, 111, 131, 151, and 171 according to the present invention can be configured. An example of the configuration will be described based on an example using the adsorption device 11 as shown in FIG. Of course, the adsorption apparatus according to another embodiment can be used in the same manner.

  The combustion furnace 40 generates heat for generating the desorption water vapor F, and the water vapor organic compound sent from the fuel supply port 42 for supplying the fuel D and the water vapor supply port 26 of the adsorption device 11. It has a contained gas supply port 43 for supplying the accompanying gas K, a burner (not shown), a chimney 60, and a combustion furnace temperature sensor 44 for measuring the internal temperature. The heat generated in the combustion furnace 40 is supplied to the heat exchanger 41 through the high temperature gas supply passage 45 as the generated high temperature gas L.

  The heat exchanger 41 includes a water supply port 58 that supplies water E that is a source of water vapor, and supplies the desorption water vapor F obtained by heating the water E with the heat of the high-temperature gas L to the water vapor supply of the adsorption device 11. A desorption water vapor supply path 52 to be supplied to the mouth 25 and a water vapor temperature sensor 56 for measuring the internal temperature are provided. The water supply port 58 has a function of spraying water E into the heat exchanger 41. The exhaust gas M after the hot gas L is cooled by passing heat to the water E is discharged to the atmosphere through the exhaust gas supply passage 46.

  The desorption water vapor supply path 52 from which the desorption water vapor F generated in the heat exchanger 41 is extracted is branched in the middle (circulation path branch point 53), and one of the water vapor generation circulation paths returns to the heat exchanger 41. 54, and the other is divided into a water vapor supply path 55 that leads to the adsorption device 11. A blower 61 that blows up toward the heat exchanger 41 is provided in the middle of the water vapor generation circulation path 54 to generate a circulating air flow.

  The water vapor supply path 55 leading to the adsorption device 11 is also branched on the way (atmosphere release path branch point 57), one connected to the open port 59 to the atmosphere, and the other connected to the water vapor supply port 25 of the adsorption device 11. ing.

  Each of the water vapor supply ports 25 (25a, 25b) is provided with a valve. The valves of the water vapor supply ports 25 are opened at the start of desorption to the respective adsorption devices 11 (11a, 11b). After that, naturally, when the desorption process is completed, the valve of the water vapor supply port 25 of the adsorption device 11 is completely closed.

11, 11a, 11b Adsorber 12, 12a, 12b Adsorbent accommodating part 13 Both end wall surface 14 Upper end blocking part 15 Wall surface 17, 17a, 17b, 17c Inlet (volatile organic compound-containing gas)
18, 18a, 18b, 18c outlet (after-treatment gas)
19 Accompanied gas delivery path 20, 20a, 20b Perforated plate (upper side)
21, 21a, 21b Perforated plate (lower side)
22 Bottom 23, 23a, 23b Lower entrainment region 24, 24a, 24b Upper entrainment region 25, 25a, 25b Steam supply port 26, 26a, 26b Steam supply port (steam organic compound accompanying gas)
27, 27a, 27b, 27c Drain outlet 28 Drain piping 29 Drain storage device 30, 30a, 30b Lid 31 Adsorbent 32 Main lid 33 Edge wall 34 Sub lid 35 Second sub lid 36 Upper perforated plate extension 40 Combustion furnace 41 Heat Exchanger 42 Fuel Supply Port 43 Contained Gas Supply Port 44 Combustion Furnace Temperature Sensor 45 Hot Gas Supply Channel 46 Exhaust Gas Supply Channel 52 Desorption Steam Supply Channel 53 Circulation Route Branch Point 54 Steam Generation Circulation Route 55 Steam Supply Channel 56 Steam Temperature Sensor 57 Atmospheric open path branch point 58 Water supply port 59 Open port 60 Chimney 61 Blower 71, 91, 111, 131, 151, 171 Adsorption device 72, 92, 112, 132, 152a, 152b, 152c, 172a, 172b, 172c , 172d adsorbent accommodating portions 73, 93, 113, 133, 153a, 153b, 153c, 73a, 173b, 173c, 173d perforated plate (upper side)
74, 94, 114, 134, 154a, 154b, 154c, 174a, 174b, 174c, 174d Perforated plate (lower side)
75, 95, 115, 135, 155a, 155b, 155c, 175a, 175b, 175c, 175d Bottom surface 76, 96, 116, 136, 156a, 156b, 176a, 176b Upper wrapping region 77, 97, 117, 137, 157a 157b, 177a, 177b, 177c Lower entrainment region 78, 98, 118, 138, 158, 178 Device wall surface 79, 99, 119, 139, 159a, 159b, 159c, 179a, 179b, 179c, 179d Lid 83, 103, 123, 143 Upper perforated plate extension parts 121, 141, 161, 181a, 181b Upper wall surface fixing parts 122, 142, 162 Lower wall surface fixing part A Volatile organic compound-containing gas B Processed gas D Fuel E Water F Desorption Water vapor G Drain K Water vapor organic compound accompanying gas L High temperature gas S Exhaust gas P Vertical section center plane Q Joint section vertical section S Short path

Claims (12)

An adsorbing device that has an adsorbent accommodating portion filled therein with an adsorbent that adsorbs a volatile organic compound, and that can be supplied with desorption water vapor that contacts the water vapor and desorbs the volatile organic compound from the adsorbent accommodating portion. Because
Above the adsorbent container, it has a volatile organic compound-containing gas inlet and a water vapor outlet,
Below the adsorbent container, it has a post-treatment gas outlet and a water vapor supply port,
The adsorbent accommodating part has at least two perforated plates provided with a plurality of holes through which gas permeates and does not allow the adsorbent to pass. The perforated plates may be inclined and do not have the holes. It has a bottom surface on the lower side that may consist of a blocking plate and may face in an oblique direction,
Connected from the area below the adsorbent accommodating part, and has a lower entrainment area in contact with one porous plate that becomes the side surface of the adsorbent accommodating part,
Connected from the area above the adsorbent accommodating part, and has an upper wrapping area in contact with another perforated plate which is another side of the adsorbent accommodating part,
The upper wrapping area and the lower wrapping area are opposite to each other,
Gas passes from the lower entrainment region to the upper entrainment region through a path passing through both of the perforated plates, and
An apparatus for adsorbing volatile organic compounds, in which gas passes from the upper entrainment region to the lower entrainment region through a path passing through both of the perforated plates.   The adsorbing device for a volatile organic compound according to claim 1, wherein the side surface is an inclined surface, and the lower entrainment region and the upper entrainment region are narrower toward the tip. The adsorbent container has two parts that are plane-symmetric with respect to the center plane of the longitudinal section of the adsorption device,
The space between the upper side surfaces, which are the side surfaces in contact with the upper wrapping region of the part, is wide at the top and narrow at the bottom.
The lower side surface, which is the side surface of the part that is in contact with the lower entrainment region, approaches the wall surfaces at both ends facing each other through the center line of the longitudinal section of the adsorption device, and is further away from the lower side. The adsorption apparatus for volatile organic compounds according to 2. The adsorbent accommodating portion whose side surface is an inclined surface has a plurality of portions that are continuously arranged in the horizontal direction in the longitudinal section of the adsorption device, and each has an inclined surface,
The respective parts are joined to the adjacent parts at the upper end or the lower end, and the adsorbent accommodating parts adjacent to each other are inclined so as to be plane-symmetric with respect to the joint vertical cross section that is a vertical cross section including the joining line. The directions are staggered,
The upper wrapping region of the part is wide on the top and narrow on the bottom,
The lower wrapping region of the part is wide at the bottom and narrow at the top,
The adsorption apparatus for a volatile organic compound according to claim 2. The upper wrapping region is arranged in the center of the adsorption device, and is an inverted quadrangular pyramid with the lower part at the top,
The lower side surface that is the side surface in contact with the lower entrainment region of the adsorbent accommodating portion is an inverted quadrangular pyramid shape,
The adsorption apparatus for a volatile organic compound according to claim 2. The upper wrapping area is arranged in the center of the adsorption device, and has an inverted conical shape with the lower part at the top,
The lower side surface which is the side surface in contact with the lower wrapping region of the adsorbent accommodating portion is an inverted truncated cone shape.
The adsorption apparatus for a volatile organic compound according to claim 2. The adsorbing device for volatile organic compounds according to claim 1, wherein one perforated plate and the other perforated plate serving as side surfaces of the adsorbent accommodating portion are set to face in a direction perpendicular to the vertical direction. . The perforated plate on the side in contact with the upper wrapping region has an upper perforated plate extension protruding above the upper end of the lower wrapping region,
The sorbent adsorbing device according to any one of claims 1 to 7, wherein the adsorbent accommodating portion is filled with an adsorbent in an amount that reaches the upper perforated plate extension. A main lid was placed on the upper surface of the adsorbent accommodated in the adsorbent accommodating portion.
The adsorption apparatus for a volatile organic compound according to claim 8. The volatile organic compound adsorbing device according to claim 9, wherein the main lid has an edge wall directed downward at an edge on the upper entrainment region side. On the outer edge of the main lid, a sub lid smaller than the main lid was placed.
The volatile organic compound adsorption apparatus according to claim 9 or 10. An adsorption device for a volatile organic compound according to any one of claims 1 to 11,
A combustion furnace capable of using the desorbed volatile organic compound as a part of the fuel;
The volatile organic compound processing apparatus which has a heat exchanger which heat-exchanges the high temperature gas and water which were produced | generated with the said combustion furnace, and produces | generates the said water vapor | steam.

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