JP2012232292A - Absorption tower, and biological deodorization apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorption tower and a biological deodorization apparatus in which the shape of a sponge material can be kept for a long period of time, and the advantage thereof as a porous material is used, and the absorption efficiency of an odorous substance or the like can be maintained for a long period time.SOLUTION: The absorption tower includes: a gas-liquid contact layer; a liquid supply device supplying a liquid to the gas-liquid contact layer; and a gas-supplying part supplying a gas to the gas-liquid contact layer, wherein a prescribed component included in the gas is absorbed into the liquid at the gas-liquid contact layer. The gas-liquid contact layer includes: two or more porous materials of a plate or sheet shape being parallel by a standing position; and two or more insertion members disposed to be brought into contact with the porous material alternately, and sandwiching the porous material. The insertion members have an unevenness surface profile, and form a gap in which the gas can pass by the unevenness at a space with the porous material. The biological deodorization apparatus includes the absorption tower, the gas-liquid contact layer retains a microorganism that can decompose an odorous substance, the liquid is water, and the odorous substance included in the gas is absorbed by the water and is decomposed by using the microorganism.

Description

  The present invention relates to an absorption tower that absorbs a substance in a gas into a liquid by gas-liquid contact using a porous body, and a microorganism that is supported on the porous body of the absorption tower and converts a malodorous substance in the gas by the action of the microorganism. The present invention relates to a biological deodorization apparatus to be removed.

  Absorption towers that absorb a substance contained in a gas by gas-liquid contact using a granular or piece-like filler or a porous material are used for various applications, and a typical example is a deodorizing apparatus. Among them, the biological deodorization apparatus allows water to pass through a filler carrying microorganisms capable of decomposing odorous substances, and dissolves odorous substances in the gas phase in water to promote decomposition by microorganisms. Since it does not need to be used and is low-cost, it is widely used (for example, Non-Patent Document 1 below). Factors that determine the performance of the biological deodorization apparatus include absorption efficiency of odorous substances and decomposition efficiency by microorganisms. The absorption efficiency of odorous substances is largely controlled by the surface area of the filler, particularly the wetted area. Therefore, in order to increase the absorption efficiency, it is desirable to use a hydrophilic filler having a large specific surface area. In consideration of the propagation of microorganisms on the surface of the filler, it is preferable to use a filler having a large specific surface area from the viewpoint of the efficiency of decomposition by microorganisms. However, when a fine particle filler is used as a filler having a large specific surface area, the air permeability is poor and clogging due to the propagation of microorganisms is likely to occur. For this reason, in biological deodorization devices, a filler of a certain size (specifically, about 5 cm or more) is used to prevent clogging and ensure air permeability, and the absorption efficiency and decomposition efficiency must be sacrificed to some extent. I don't get it. As a result, the biological deodorization apparatus has been evaluated to require a large site in order to compensate for the low absorption efficiency and low decomposition efficiency even though the cost is low.

  As means for overcoming such drawbacks, Patent Document 1 below discloses a biological deodorization apparatus using a porous sponge as a filler for an absorption tower. This document does not disclose a sponge filling form. In the following Patent Document 2, a biological deodorization apparatus is described in which a granular filler having a high compressive strength and a water-absorbing filler are mixed and filled, and an example of mixed filling of polypropylene granules and hydrophilic polyurethane foam is illustrated.

  On the other hand, in the field of wastewater treatment, development of treatment technology using a sponge has been advanced, and a wastewater treatment apparatus (Patent Document 3 below) in which a sponge sheet is bent and a bent portion is supported by a round bar and a support plate, In addition, a sprinkling filter bed apparatus (Patent Documents 4 and 5 below) that hangs a sponge lump with a sheet or a wire and suspends the sponge lump and uses it for filtering sewage has been proposed.

Japanese Patent Publication No. 6-91934 Japanese Patent No. 3922920 Japanese Patent No. 2620300 Japanese Patent No. 3443725 Japanese Patent No. 3586745

Supervised by the Ministry of Construction City Bureau Sewerage Department, "Sewerage Facility Planning and Design Guidelines and Explanations" (1994 edition), published by Japan Sewerage Association

  In general, when a sponge is used as a packing material for an absorption tower, a cube-like sponge lump is stacked and used. In this case, since it is possible to make it possible to ensure air permeability while preventing clogging by using a cube of a certain size, the biological deodorization device utilizing the size of the specific surface area due to the porous Can be expected to improve efficiency. However, in actuality, for example, when a cube-like sponge is stacked and used for a long time in the biological deodorization apparatus of Patent Document 1, for example, the lower sponge is crushed by weight due to water absorption and microbial propagation, and the height of the sponge layer is low. (So-called sinking), and as a result, ventilation becomes difficult. In this regard, in the biological deodorization apparatus of Patent Document 2, sinking is suppressed, but the volume occupied by the water-absorbing filler is limited by the filler having compressive strength, so that the expected efficiency improvement is achieved. It is difficult.

  Moreover, in the structure of patent document 3, since the load by the weight increase of sponge concentrates locally, suppression of subduction is not enough and the problem of long-term intensity | strength is not solved. In the configurations of Patent Documents 4 and 5, the manufacturing process is very complicated and time-consuming, so implementation is accompanied by economical difficulties and is not suitable for practical use.

  An object of the present invention is to provide an absorption tower that can solve the above-described problems and that can effectively use the advantages of a sponge material and suppress collapse due to long-term use and prevent a decrease in absorption efficiency in a configuration that is easy to use in practice. It is.

  Another object of the present invention is to provide a biological deodorization apparatus that can prevent the deterioration of absorption efficiency and decomposition efficiency of odorous substances caused by microorganisms by utilizing the advantage of sponge material and suppressing crushing associated with long-term use. Is to provide in.

  Furthermore, the subject of this invention is providing the absorption tower which has a structure which is easy to respond to weight reduction and the design change according to use conditions, and a biological deodorizing apparatus using the same.

  In order to solve the above problems, the present inventors have conducted extensive research and as a result, suppressed the collapse of the sponge material by using a plate-like sponge material and an insertion member that sandwiches the sponge material. The inventors have found that it is possible to prevent a decrease in absorption efficiency, and have completed the present invention.

  According to an aspect of the present invention, the absorption tower includes a gas-liquid contact layer, a liquid supply device that supplies liquid to the gas-liquid contact layer, and a gas supply unit that supplies gas to the gas-liquid contact layer. And an absorption tower that allows the liquid to absorb a predetermined component contained in the gas by contact between the liquid and the gas in the gas-liquid contact layer, wherein the gas-liquid contact layer includes a plurality of standing in parallel It has a flat plate-like or sheet-like porous material, and a plurality of insertion members that are alternately placed in contact with the plurality of porous materials to sandwich the porous material, and the insertion members are uneven. The gist is to form a gap that has a surface shape and allows the gas to pass between the porous material and the porous material.

  As the porous material, a sponge material having continuous pores having a pore diameter of 500 μm to 3 mm and a porosity of 90% by volume or more can be used. The insertion member is made of a rigid material and has shape retention.

  According to another aspect of the present invention, a biological deodorization apparatus includes the absorption tower, the gas-liquid contact layer holds microorganisms capable of decomposing odorous substances, the liquid is water, The odorous substance contained in the gas as a component is absorbed in water and decomposed using the microorganism.

  In the biological deodorization apparatus, a sponge material made of polyurethane ether foam can be used as the porous material, and sulfur oxidizing bacteria or ammonia oxidizing bacteria can be used as the microorganism.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide an absorption tower that can prevent crushing associated with long-term use of a sponge material and prevent a decrease in absorption efficiency by using a configuration that is easy to put to practical use, and can be used to carry microorganisms. By doing so, it is possible to provide a biological deodorization apparatus that can maintain the absorption efficiency of odorous substances and the decomposition efficiency by microorganisms for a long period by taking advantage of the sponge material.

Explanatory drawing for demonstrating the example of the insertion member and sponge material in this invention. The top view (a) which shows 1st Embodiment of the absorption tower concerning this invention, AA sectional view (c) in a vertical direction sectional view (b), (b), BB line in (b) Sectional drawing (d). The vertical direction sectional view showing a 2nd embodiment of the absorption tower concerning the present invention. A top view (a) which shows a 3rd embodiment of an absorption tower concerning the present invention, a vertical direction sectional view (b), AA line sectional view in (b) (c), a BB line in (b) Sectional drawing (d). The vertical direction sectional view showing a 4th embodiment of the absorption tower concerning the present invention. Top view (a) which shows 5th Embodiment of the absorption tower which concerns on this invention, AA sectional view (c) in a vertical direction sectional view (b), (b), BB line in (b) Sectional drawing (d). The vertical direction sectional view showing the 6th embodiment of the absorption tower concerning the present invention. The vertical direction sectional view showing a 7th embodiment of the absorption tower concerning the present invention. The vertical direction sectional view showing the 8th embodiment of the absorption tower concerning the present invention. The element of each part which comprises the absorption tower of FIG. 9 is shown, (a)-(c) is a side view, (d) is a bottom view, (e) is the sectional view on the AA line in (b), (f) FIG. 4B is a sectional view taken along line BB in FIG. The component of the absorption tower of FIG. 9 is shown, (a) is a side view of main structure, (b) is a side view of a mount frame.

  When a porous body is used to perform gas-liquid contact for absorbing a substance in a gas into a liquid, it is necessary to have pores of a certain size or larger in order to facilitate the passage of the gas. The porous body suitable for use in the above becomes a sponge that is flexible and easily elastically deformed. The sponge becomes heavier due to water retention, and when the microorganisms are propagated and supported, the weight of the microorganisms increases. Therefore, the weight of the sponge material used in the absorption tower increases with time. As a result, the lower the portion where the load becomes larger, the sponge is easily crushed, and the sponge is crushed and clogged with material fatigue and the long-term use becomes difficult.

  In the present invention, a plate-like or sheet-like porous material and a rigid material shape-retaining insert member are used, and a plurality of insert members are interposed between a plurality of porous members, and a standing porous material The material is sandwiched between the insertion members. Specifically, the porous material is inserted by alternately arranging a plurality of flat plate-like or sheet-like porous materials standing in the vertical direction and a plurality of plate-like insertion members in parallel. The gas-liquid contact layer is formed by sandwiching these members together. The insertion member has an uneven surface shape, abuts against the porous material at the convex portion, and forms a gap through which gas can pass between the porous material and the concave portion. Since the porous material sandwiched by the insertion member is supported by the convex portion of the insertion member, durability against an increase in weight due to moisture content and propagation of microorganisms can be obtained, so even if a sponge material is used as the porous material In addition, shape changes such as crushing and sinking are suppressed. Gas flow and gas-liquid contact are promoted by the gap in the recess of the insertion member.

  Hereinafter, the absorption tower and biological deodorization apparatus according to the present invention will be described in detail.

  In the absorption tower and biological deodorization apparatus of the present invention, a plurality of plate-like or sheet-like porous materials are used as the porous body for gas-liquid contact, and a sponge material having a high porosity is preferably used. A gas-liquid contact layer of the absorption tower is formed by sandwiching and integrating a plurality of sponge materials using a plurality of insertion members.

  In order to exhibit excellent liquid permeability and air permeability, the porous material constituting the gas-liquid contact layer specifically has affinity and resistance to the liquid phase and has continuous pores having a pore diameter of about 500 μm to 3 mm. A sponge material having In order to obtain suitable contact efficiency, a foam material having a porosity of about 90% by volume or more is preferably used, and becomes a material that is flexible and elastic depending on the height of the porosity. However, in order to maintain the shape retaining property that can withstand its own weight, the upper limit of the porosity is generally about 97% by volume. Porous materials include various natural or synthetic foam materials. For porous materials used in absorption towers and biological deodorization devices, foaming plastic sponge materials are suitable because they are easy to mold and lightweight. Examples thereof include polyolefin foams such as polyethylene and polypropylene, and foamed plastics such as polyurethane and polyester. In an absorption tower that uses water as the liquid phase, a porous material having hydrophilicity is used, and in a biological deodorization device, the porous material is further composed of a material capable of supporting and propagating microorganisms. The key point. Accordingly, it is preferable to use a foaming material such as hydrophilic polyurethane, melamine, or polyester, and polyurethane ether foam is optimal in view of degradation due to hydrolysis.

  In order to suppress the collapse of the sponge material by sandwiching the side surface of the standing sponge material with the insertion member, the sponge material is preferably a flat plate or a sheet having a thickness of about 10 to 50 mm. The height of the porous material in the standing state is preferably about 50 to 300 cm. If the sponge material is excessively thick, a depression at the center of the thickness tends to occur. If the sponge material is too high, the load at the bottom of the sponge exceeds the support of the plug-in member, and crushing easily occurs.

  The insertion member is formed in a shape with an uneven surface using a rigid material having shape retention (strength), and its strength is durable so as not to be deformed by the weight load of the water-containing sponge material. Good. The insertion member is desirably lightweight and can be molded into a thin shape. Preferred materials thereof include, for example, polymer resins such as vinyl chloride, FRP, polyethylene, polypropylene, polycarbonate, polystyrene, and ABS, and corrosion of stainless steel, aluminum, and the like. Examples thereof include, but are not limited to, metal materials that are difficult to be used, and suitable materials selected from hard materials having durability against water and corrosion resistance may be used.

  The shape of the insertion member can be classified into two types depending on whether the main part of the insertion member is straight or bent, and the first is a bent plate shape in which a thin flat plate is bent or refracted, that is, the main body The second shape is a bent shape, and the second is a straight plate shape having protrusions on the flat plate surface, that is, a shape in which the main portion extends straight. 1A shows an insertion member 1a obtained by bending a flat plate into a waveform at a predetermined cycle, and FIG. 1B shows an insertion member 1b bent in a bellows shape at a predetermined cycle. (C) illustrates the insertion member 1c provided with a plurality of protrusions p (or formed with depressions) at a predetermined interval on the flat plate surface. When the insertion member 1c is erected vertically, the protrusion p is a rectangular bar-shaped protrusion having a rectangular horizontal cross section and extends in the vertical direction, and a groove extending in the vertical direction is formed between adjacent protrusions. The horizontal cross section is rectangular. Since the surface shape of each of the insertion members 1a to 1c is regularly uneven, when the sponge material 3 and the insertion members 1a to 1c are alternately arranged in parallel, the sponge material 3 is formed at the convex portions of the insertion members 1a to 1c. And the insertion member occupies a flat space between the sponge members and is arranged in parallel with each other.

  In order to improve the gas-liquid contact efficiency in the gas-liquid contact layer, it is desirable to make the space occupied by the insertion member between the sponge materials as small as possible. Practically, the width of this space (distance between the sponge materials) The thickness may be as thin as about 10 mm or less, preferably about 3 to 7 mm. A gap is formed between the insertion member 1a-c and the sponge material 3 in the recesses, and ventilation in the vertical direction is possible. If the air gap is excessively wide, gas or water escapes and the gas-liquid contact efficiency may be reduced. Therefore, the width and depth of the groove between the protrusions p (the air width) is 0.25. It is preferable to configure so as to be about ˜2.5 cm. The cross-sectional shape of the recess may be appropriately selected from various shapes such as a rectangle such as a square, a rectangle, and a trapezoid, and a polygon including a triangle, a semicircle, a semi-ellipse, and a waveform. The rod-like protrusions P in FIG. 1C may be changed to prismatic protrusions so that the grooves between the protrusions may have various mesh shapes such as grids.

  When the convex portions of the insertion member are regularly positioned, the sponge material is supported by the convex portions of the insertion member evenly and in a balanced manner as a whole. In order to firmly hold the sponge material, it is preferable that the contact area between the insertion member and the sponge material is large. In this respect, the convex portion of the insertion member is in contact with the sponge material in FIG. 1 (c). The insertion member 1c is optimal. When the curved surface is in contact with the sponge material, the contact area is increased by pressing the sponge material to an extent that it is slightly elastically deformed, and local concentration of distortion of the sponge material can be suppressed. The plug-in member 1a that makes contact with the curved surface as shown in FIG. In FIG. 1 (a), the insertion members 1a are arranged so that the curves of the insertion members 1a are parallel to each other. However, when the orientation is changed so that the curves of the insertion members on both sides are symmetrical with respect to the sponge material. Since the sponge material is sandwiched symmetrically, it is easy to obtain the accuracy and closeness of support.

  When the number of sponge materials is n, if the number of insertion members is within a range of n ± 1, these can be alternately arranged, and when n + 1, both ends of the sponge material are sandwiched between insertion members, When n−1, the ends are arranged in a sponge material as shown in FIG. 1. In this case, the sponge materials at both ends can be sandwiched on one side by the inner wall of the absorption tower. It is also possible to substitute a part of the insertion member with, for example, a flat insertion member having no unevenness. Although it can be used even in an arrangement in which the insertion members between the sponge materials are partially missing (number of insertion members <n−1), the portion lacking the insertion members has an effect of suppressing the collapse of the sponge. Therefore, it is desirable that the sponge material and the insertion member are alternately positioned. The insertion member may be configured to be provided with pores penetrating in the thickness direction so as to allow ventilation between both sides via the insertion member. In this case, it is preferable to pay attention to the size, number and distribution of the pores so that the strength of the insertion member is not insufficient.

  The gas-liquid contact layer of the absorption tower or the biological deodorization apparatus is configured by using a plurality of insertion members and a plurality of sponge materials alternately arranged as described above as a set of units. The height of the insertion member is preferably substantially the same as that of the sponge material. If the height of the insertion member is higher than that of the sponge material, care should be taken not to cause a gas escape path that hinders gas-liquid contact. The difference is desirably about 20 cm or less. A holding tool for restraining the plug member and the sponge material in a set of units may be used, but the plug member and the sponge material are collected in a space as a gas-liquid contact layer of an absorption tower or a biological deodorization device. By designing the internal structure of the absorption tower so that these are fitted and fixed in close contact with the inner wall surface of the device, the insertion member and sponge material can be fixed closely without using a holding tool. Can do. When the insertion member and the sponge material arranged upright are pressed in the horizontal direction to such an extent that the sponge material is slightly elastically deformed, the closeness between the convex portion of the insertion member and the sponge material increases, and the elastic repulsion of the sponge material causes The clamping by the insertion member becomes strong. Therefore, the width of the space constituting the gas-liquid contact layer of the absorption tower or biological deodorization device is slightly smaller than the total amount of the width of the sponge material and the width of the flat space occupied by the insertion member (distance between the sponge materials). If it sets, when a sponge material and an insertion member are attached to an absorption tower or a biological deodorizing device, they are pressed against each other and firmly sandwiched, and the collapse of the sponge material due to a weight load during use can be suitably suppressed.

  In the above configuration, when a support rod that penetrates the standing sponge material and the insertion member in the horizontal direction is provided, the sponge material is suspended by the support rod that is horizontally mounted on the insertion member, and the load is the maximum of the sponge material. Since it can prevent collapsing in the lower part, it is possible to increase the thickness and height of the sponge material. Therefore, when using a sponge material thicker or higher than the above-mentioned appropriate range, it can be dealt with by providing a support bar. It is preferable that the support bar is configured to penetrate the upper part of the sponge material. The support bar is preferably made of a material having rigidity and water resistance, like the insertion member, and examples thereof include various plastics, corrosion-resistant metals such as stainless steel, ceramics, and the like. Since it is preferable that the load of the sponge material supported by the support rod is distributed as evenly as possible on the support surface, for example, a support rod having a circular or oval cross section is used, and the corresponding through hole is formed between the sponge material and the difference. It may be provided on the insert member. The thickness of the support rod is preferably about 5 to 25 mm, and it is preferable that the support rod is arranged in parallel so as to penetrate the sponge material and the insertion member vertically at intervals of about 20 to 80 cm. Alternatively, it is possible to replace the support rod by locally joining the sponge material and the insertion member with an adhesive.

  Hereinafter, an embodiment of an absorption tower using the above-described sponge material and plug-in unit as a gas-liquid contact layer (microorganism support layer) will be described. In the following description, an absorption tower will be described as an embodiment using a biological deodorization device, water is used as a liquid phase, a microorganism that decomposes an odorous substance is supported on a sponge material, and the odorous substance is absorbed as a specific substance. If it is decomposed by microorganisms, but the sponge material is not loaded with microorganisms, the liquid phase used and the material of the sponge material are changed to a liquid suitable for absorption of predetermined components in the gas and a material resistant to this, It can be used as a general absorption tower.

  FIG. 2 shows a first embodiment of the absorption tower, and the absorption tower 10 has two sets of porous units 5A and 5B composed of the insertion member 1 and the sponge material 3 as described above as gas-liquid contact layers. . 2A is a top view of the absorption tower 10, FIG. 2B is a vertical sectional view, FIG. 2C is a sectional view taken along line AA in FIG. 2B, and FIG. FIG. In this embodiment, although the insertion member 1a of Fig.1 (a) is used as the insertion member 1, it is not limited to this, You may change to another insertion member as needed.

  The absorption tower 10 has a box-shaped main body tank 11 for constituting a gas-liquid contact layer and a circulating water storage tank, a pump 13 for circulating water W, a circulation line 15 and a distributor 17 inside. Two sets of porous units 5A and 5B composed of a vinyl chloride insertion member 1 and a polyurethane ether foam sponge material 3 are arranged vertically and mounted in the main body tank 11 so as to be vertically arranged. A gas-liquid contact layer is formed. The distributor 17 is configured using a pipe provided with a large number of holes for spraying water downward, and is disposed horizontally above the porous unit 5A so that the entire upper surface of the sponge material 3 can be sprinkled with water. In addition, local watering is prevented by branching the pipe as needed and stretching it over the entire porous unit 5A. The bottom of the main body tank 11 stores the water W and constitutes a circulating water storage tank. By driving the pump 13 attached outside the main body tank 11, the water W at the bottom is sent out of the tank through the through-hole 19 penetrating the side wall of the bottom of the main body tank 11 and from the pump 13 through the circulation line 15. Is supplied to the top of the main body tank 11 and sprayed from the distributor 17 in the main body tank 11 to the porous unit 5A. The sprayed water passes through the gap between the sponge material 3 and the insertion member 1 of each unit and the holes in the sponge material 3, is discharged from the lower part of the porous unit 5 </ b> B, and falls to the bottom of the main body tank 11.

  Below the porous unit 5B, a vent 21 penetrating the side wall of the main body tank 11 is provided at a position above the water level of the water W stored in the bottom. The gas G containing an odorous substance is introduced into the main body tank 11 from the vent hole 21, supplied from the lower side of the porous unit 5B, and passes upward through the gas-liquid contact layer. Therefore, in the main body tank 11, the moving direction of the water W passing through the gas-liquid contact layer and the moving direction of the gas G are opposite. The gas G diffuses into the pores of the sponge material 3 while passing through the gas-liquid contact layer, and the odorous substance is absorbed by the water contained in the sponge material 3. The gas G ′ thus purified is discharged from the vent 23 provided at the center of the top of the main body tank 11. As long as the vent 23 is located above the distributor 17, the vent 23 may be provided on the peripheral edge of the top or the side wall of the main body tank 11.

  In this embodiment, the main body tank 11 has water-permeable and air-permeable support plates 25A and 25B for supporting the porous units 5A and 5B. The support plates 25A and 25B are manufactured of a material having strength and water resistance that can withstand the load of the porous unit. The shape of the support plates 25A and 25B is, for example, a mesh-like thin plate shape, a screen shape having slits, or a thick plate having through holes. What is necessary is just to select suitably from various shapes which have such a water flow / ventilation hole as needed.

  By providing a door that can be opened and closed on one side wall of the main body tank 11 so that the insertion member 1 and the sponge material 3 can be inserted from the side surface, the porous units 5A and 5B can be easily mounted and removed. Further, a protrusion or a horizontal guide groove for supporting the support plates 25A and 25B is provided inside the side wall of the main body tank 11, and the support plate is slid in the horizontal direction on the protrusion or in the guide groove. If it is configured so that it can be mounted and removed, it is advantageous in assembling and maintaining the apparatus.

  The mounted porous units 5A and 5B are fitted in the main body tank 11, and the outer surfaces of the sponge material 3 located at both ends of each unit are supported in close contact with the side walls of the main body tank 11, and each sponge material is 3 and both end edges of each insertion member 1 are also in close contact with the side wall of the main body tank 11. At this time, if the sum of the width of the sponge material 3 and the width of the flat space occupied by the insertion member 1 is set to be slightly larger than the lateral width of the internal space of the main body tank 11, the sponge material 3 fitted into the tank is inserted. And the insertion member 1 is press-contacted with each other in the horizontal direction, so that the closeness is increased and the gas escape path can be eliminated. In this connection, the main body tank 11 only needs to have a durable strength that can accommodate the porous unit against the elastic repulsion of the sponge material 3.

  The parallel direction of the plug-in member 1 and the sponge material 3 is arranged so that the porous unit 5A and the porous unit 5B intersect perpendicularly, thereby suppressing the formation of water and gas escape passages. A decrease in liquid contact efficiency is prevented. When this embodiment is applied and three or more sets of porous units are arranged in a vertical direction to form a multistage configuration, the parallel direction of the insertion member 1 and the sponge material 3 is perpendicular to each other in the vertical porous units. It is good to become. Thus, when the parallel direction of the insertion member 1 and the sponge material 3 is alternated for each unit, the horizontal cross-sectional shape inside the main body tank 11 is a square. In a one-stage configuration using a single porous unit or a multi-stage configuration in which the parallel direction of the insertion member 1 and the sponge material 3 in the plurality of porous units is the same, the horizontal cross-sectional shape inside the main body tank 11 is rectangular. May be.

  When microorganisms capable of decomposing odorous substances are supplied to the sponge material 3 and nutrients necessary for the growth of the microorganisms are added to the water W stored in the bottom of the main body tank 11 and circulated, the microorganisms are formed on the surface of the sponge material 3. It grows and propagates in the pores or on the surface of the insertion member 1 and becomes a gas-liquid contact layer on which microorganisms are supported. Alternatively, a microorganism culture solution may be infiltrated into a sponge material in advance to attach microorganisms, and a porous unit may be configured using this to be attached to the main body tank 11. The odorous substance dissolved in the water by the contact with the gas G when the water flows down the porous units 5A and 5B diffuses in the water, is taken in and decomposed by the microorganisms on the sponge material 3, and is also an energy source for the microorganisms. It becomes. The water W stored at the bottom of the main body tank 11 also contains microorganisms that propagate on the sponge material 3, and the decomposition by the microorganisms proceeds also in the water W stored at the bottom. Therefore, the odorous substance falling to the bottom while remaining in the water without being decomposed by microorganisms in the gas-liquid contact layer is decomposed in the water W at the bottom of the main body tank 11 or returned to the distributor 17 to be porous. It is supplied again to the quality unit 5A and decomposed. Examples of odorous substances include water-soluble sulfur compounds such as hydrogen sulfide, methyl mercaptan, methyl sulfide, and methyl disulfide, and water-soluble nitrogen compounds such as ammonia and trimethylamine. Examples of microorganisms effective for decomposing such odorous substances include sulfur-oxidizing bacteria and ammonia-oxidizing bacteria (nitrifying bacteria). For example, microorganisms contained in activated sludge used for wastewater treatment are appropriately collected and used. it can.

  When the absorption tower 10 of FIG. 2 is used as an absorption tower that physicochemically absorbs a specific substance contained in the gas G, the water W to be circulated and the material of the sponge material 3 are liquids that easily absorb the specific substance. It can be changed to a medium and a material resistant to liquid. For example, in the case of an absorption tower that absorbs carbon dioxide, it is preferable to change to an aqueous solution containing alkanolamine as an absorbent. Since the absorbed specific substance is not decomposed, in order to continuously perform the gas purification process, it is necessary to recover the absorbed specific substance from the liquid medium and regenerate the liquid medium. For this reason, when a regenerating means for regenerating the liquid medium is provided and the liquid stored in the bottom of the absorption tower 10 is circulated to the top distributor 17 through the regenerating means, it is absorbed by the absorption tower. The specific substance is recovered by the regenerating means, and the purification treatment can be continuously performed using the regenerated liquid. When used as a carbon dioxide recovery tower, a regeneration tower having a heating device for heating a liquid medium and a gas-liquid contact layer is provided.

  FIG. 3 shows a second embodiment of the absorption tower, in which the pump 13 in FIG. 2 is changed to a submersible pump 13 '. Specifically, the main body tank 31 of the absorption tower 30 is provided with an extended portion 33 that protrudes in the lateral direction from the bottom side surface to constitute a circulating water storage tank that extends in the lateral direction. The submersible pump 13 ′ is installed in the extension portion 33, and the water W sucked by the submersible pump 13 ′ is sent to the circulation line 15 through a pipe that penetrates the upper wall portion of the extension portion 33. This configuration is effective in preventing a water leak accident from the absorption tower 30. If an openable / closable door is provided on the upper wall portion of the extension portion 33 to facilitate taking in and out of the submersible pump 13 ', it is advantageous for maintenance. Since the configuration other than the above is the same as the absorption tower 10 of FIG. 2, the description thereof is omitted.

  FIG. 4 shows a third embodiment of the absorption tower. In this absorption tower 40, the insertion member 1 of the porous units 5A and 5B in the absorption tower 10 of FIG. 2 is replaced with the insertion member 1c of FIG. The porous units 5A ′ and 5B ′ changed to the above are used. When the insertion member 1c is used, the width of the gap between the sponge material 3 and the insertion member 1c is constant, so that it is easy to adjust the dimensions to prevent the formation of gas and water escape passages. Since the configuration other than the above is the same as the absorption tower 10 of FIG. 2, the description thereof is omitted.

  FIG. 5 shows a fourth embodiment of the absorption tower. In this embodiment, the flow direction of the gas G in the absorption tower 50 is opposite to the flow of the gas G in the absorption tower 10 of FIG. That is, the supply source of the gas G containing the odorous substance is connected to the vent 23 at the center of the top of the main body tank 11, and the gas G is introduced into the main body tank 11 from the vent 23 to the upper side of the porous unit 5A. It flows downward from. While the gas G passes through the gas-liquid contact layer, the odorous substance is absorbed by the water, and the purified gas G ′ is discharged from the vent 21 at the bottom of the main body tank 11. In this absorption tower 50, since the flow of water W and the flow of gas G in the gas-liquid contact layer are in the same direction, the flow resistance is small and clogging is less likely to occur. Since the configuration other than the above is the same as the absorption tower 10 of FIG. 2, the description thereof is omitted.

  FIG. 6 shows a fifth embodiment of the absorption tower. In this absorption tower 60, the insertion member 1 and the sponge material 3 of each porous unit 5A, 5B in the absorption tower 10 of FIG. 2 are penetrated in the horizontal direction. Porous units 65A and 65B having a support bar 61 are used. In this embodiment, the support bar 61 is a stainless steel round bar having a circular cross section, and the support bars 61 that are parallel to each other at a constant interval of about 50 cm support the insertion member 1 and the sponge material 3 vertically. Cylindrical through-holes corresponding to the diameter of the rod 61 are provided in the upper part of the insertion member 1 and the sponge material 3 of each porous unit 65A, 65B. The length of the support bar 61 is substantially equal to the inner width of the main body tank 11, and the porous unit 5 </ b> A, 5 </ b> B is inserted by inserting the insertion member 1 and the sponge material 3 through which the support bar 61 is inserted into the main body tank 11. Is closely fitted in the main body tank 11 and the support rod 61 is horizontally supported by the insertion member 1 and holds the sponge material 3 in a suspended state. Therefore, the sponge material 3 sinks together with the sandwiching by the insertion member 1. And preventing collapse. Since the configuration other than the above is the same as the absorption tower 10 of FIG. 2, the description thereof is omitted.

  FIG. 7 shows a sixth embodiment of the absorption tower, and in this absorption tower 70, a system for replenishing water as necessary to keep the water level of the circulating water storage tank in the absorption tower 10 of FIG. And the system which supplies air in order to activate the microorganisms in water is provided. Specifically, the main body tank 11 includes a conduit 71 extending from the bottom of the side wall, and a water supply pipe 73 provided below the vent 21 and above the water level of the water W in the circulating water storage tank. Is connected to a level meter 75 for detecting the liquid level, and the level meter 75 is electrically connected to a pump 77. The level meter 75 detects the water level of the water W in the circulation storage tank in the conduit 71, and when the water W in the circulation water storage tank decreases due to evaporation or the like, the pump 77 is automatically driven to replenish water. The pump 77 is electrically controlled based on the detected water level so that the pump 77 is stopped when the water level returns. Further, an air diffuser 79 is installed at the bottom of the main body tank 11, and air is supplied from the blower 81 to the air diffuser 79 so that air is supplied into the water W of the circulating water storage tank, and the decomposition of odorous substances by microorganisms is promoted. Is done. Since the configuration other than the above is the same as the absorption tower 10 of FIG. 2, the description thereof is omitted.

  FIG. 8 shows a seventh embodiment of the absorption tower. In this absorption tower 90, the support plate 25A of the absorption tower 10 of FIG. 2 is omitted, and both the porous units 5A and 5B are formed by the support plate 25B alone. It is configured to support. This is effective when the insertion member 1 has sufficient strength to withstand the load of the upper porous unit, and the support plate 25B has sufficient strength to withstand both loads of the porous units 5A and 5B. It is an embodiment. Since the configuration other than the above is the same as the absorption tower 10 of FIG. 2, the description thereof is omitted.

  The main tanks 11 and 31 of the absorption tower shown in FIGS. 2 to 8 are made of a structural material having durable strength such as steel, but the gas-liquid contact layer (that is, the porous unit) of the present invention is made of a robust material. It is not necessary to enclose, and it is only necessary to guide the supplied gas and absorption liquid to be appropriately introduced into the gas-liquid contact layer. That is, the absorption tower may be configured so as to wrap the gas-liquid contact layer using a jacket formed of a flexible sheet material or the like. When the envelope surrounding the gas-liquid contact layer is a flexible material, the gas is bypassed from the outside without passing through the gas-liquid contact layer by tightening the envelope so that the outer surface is in close contact with the side surface of the gas-liquid contact layer Therefore, it is possible to easily prevent a decrease in gas-liquid contact efficiency due to a short circuit, which is very effective. In addition, when a jacket made of a soft sheet is used, it is easy to cope with the design change of the absorption tower, and it can be applied as appropriate according to the environment and conditions for installing the absorption tower, and it is possible to reduce the weight and reduce the material cost.

  The jacket is made of a soft sheet manufactured using a material that does not deteriorate with the gas to be treated and is impermeable to gas and liquid, and has two openings for introducing and discharging liquid and gas, respectively. In other words, it is formed into a tubular shape. Examples of the material for the soft sheet include resins such as polyethylene, polypropylene, EVA, polyvinyl chloride, polyvinylidene chloride, polyethylene terephthalate, and cellophane, and elastomers such as hydrochloric acid rubber. The thickness of the flexible sheet is preferably about 0.03 to 3 mm from the viewpoints of flexibility and bendability. If there is a problem with durability against gas with a single sheet, it is better to use two or more sheets in layers, for example, polyvinylidene chloride sheet with low durability against ammonia or polysulfuric acid with concern about durability against hydrogen sulfide. The vinyl chloride sheet can make use of the low gas permeability of the sheet by using a sheet excellent in gas resistance such as high-density polyethylene on the inside. Or if the sheet | seat of a laminated | multilayer film is used, an assembly operation will not be complicated. The use of a light-transmitting sheet, that is, a transparent or translucent sheet, is useful in that it is easy to grasp the state of the porous unit because the inside can be observed. It is also advantageous regarding necessity determination.

  When the inner circumference of the outer jacket is slightly smaller than the outer circumference of the porous unit, when the porous unit is inserted into the outer jacket, the insertion member and the sponge material of the porous unit are pressed against each other and firmly held, Since the side surface of the porous unit is in intimate contact with the jacket, the gas is prevented from passing through the gap between the porous unit and the jacket. However, since there is a possibility that the outer casing may be deteriorated due to tensile stress applied to the outer casing, to avoid this, use an outer casing whose inner circumference is the same as or larger than the outer circumference of the porous unit. There is a method of fastening around the gas-liquid contact layer from the outside of the jacket with a strip member such as a string or a metal wire. Thus, a circular close contact state is formed on the side surface of the gas-liquid contact layer and sealed. At this time, if the outer shell is made flexible by warming and then tightened, the sealing between the outer jacket and the side surface of the porous unit is improved. Furthermore, as a form in which the sealing property between the jacket and the porous unit is easily improved, there is a method in which an elastic member functioning as a gasket is interposed between the porous unit and the jacket. Specifically, as shown in FIGS. 9 to 11, a porous unit is inserted into an elastically deformable annular cushion 9 formed of a resilient material such as sponge and inserted into the outer cover 7. The outer jacket 7 is wound on the cushion 9 using the member 8. In this case, the cushion 9 circulates around the porous unit and functions like a gasket between the outer cover and the porous unit to increase the closing property by elastic pressure bonding, and the insertion member 1 and the sponge material 3 are integrated with each other. It also functions as a holding tool for the porous units 5A and 5B by being fixed.

  The cushion 9 is prepared using an elastic material that does not deteriorate due to the gas G or water to be processed. Examples of elastic materials include elastomers such as natural rubber and various synthetic rubbers, thermoplastic elastomers such as urethane elastomers, and foamed plastics (independent or open-cell type) such as polyurethane foam. Those having durability against the gas to be treated can be appropriately selected. The same material as the sponge material 3 may be used, which is advantageous in terms of cost. Alternatively, when the cushion 9 is covered with a film such as a resin that does not deteriorate due to the gas G, the cushion 9 itself may have low durability against the gas G. When the cushion 9 is formed of an elastic material that is impermeable to gas and liquid, the sealing property between the jacket and the porous unit becomes extremely high. Examples of the strip member 8 used for winding include, but are not limited to, strings made of vegetable fibers such as cotton and hemp, strings made of resin such as nylon and polyvinyl chloride, and metal wires such as iron wires and copper wires. What is necessary is just to clamp | tighten so that an outer_layer | skin may closely_contact | adhere to the cushion 9.

  Hereinafter, with reference to FIGS. 9-11, the absorption tower 100 which concerns on 8th Embodiment by which a gas-liquid contact layer is included in the envelope made from a soft sheet | seat is demonstrated concretely.

  The absorption tower 100 shown in FIG. 9 is constructed in an assembling manner, and is assembled using components as shown in FIGS. 10 and 11. Specifically, by combining the top portion 101 shown in FIG. 10 (a), the central portion 103 in (b), and the bottom portion 105 in (c), an absorption tower as shown in FIG. 11 (a). In order to support the top portion 101, a gantry 109 as shown in FIG. 11B is used. The structure of the absorption tower 100 is functionally equivalent to the absorption tower 10 of FIG. 2, and instead of the main body tank 31 of FIG. 2, a tubular jacket 7 formed of a transparent polyvinyl chloride sheet, and its The gas-liquid contact layer is included using the top portion 101 and the bottom portion 105 connected to the opening. Although two sets of porous units 5A and 5B stacked in the vertical direction are used as the gas-liquid contact layer, the number of stacked units may be increased by increasing the number of porous units as necessary. Moreover, although the insertion member 1 in a figure is described as the waveform insertion member 1a, another shape may be sufficient.

  A central portion 103 in FIG. 10B is a portion that absorbs gas by gas-liquid contact, and includes a gas-liquid contact layer composed of two sets of porous units 5A and 5B and a gas-liquid contact layer. The insertion member 1 and the sponge material 3 that have a tubular outer covering 7 that covers the side surface and constitute each of the porous units 5A and 5B are held by a cushion 9 that goes around the side surface. 10A has a water conduit 111, a distributor 17, and a vent 23, and the top portion 101 is connected to the porous units 5A and 5B in a state where it is connected to the upper opening of the jacket 7. And the treated gas G ′ are exhausted. The bottom portion 105 in FIG. 10C includes a water storage tank 115 and a support base 117 to which the air guide tube 113 is attached. The porous units 5A and 5B are placed on the support base 117, and the lower portion of the jacket 7 is supported on the support base 117. The bottom portion 105 supplies the gas G to the porous units 5A and 5B and accommodates the water after the gas-liquid contact. A pump 13 is installed in the water storage tank 115, and the water W can be circulated between the water storage tank 115 and the porous units 5A and 5B by connecting the pump 13 and the water conduit 11 of the top portion 101 by a circulation line. It becomes.

  As shown in FIGS. 10 (e) and 10 (f), the cushion 9 has a quadrangular ring or square shape having a square hole corresponding to the side surface shape of the porous unit so that the porous unit can be fitted therein. It is formed in a tubular shape. The four corners of the outer periphery of the cushion 9 are rounded and chamfered, and this is a useful shape in that it is easy to cover the outer cover 7 and the corners are not easily damaged. If the hole of the cushion 9 is formed slightly smaller than the horizontal cross section of the porous unit, it is easy to obtain adhesion between the side surface of the inserted porous unit and the inner periphery of the cushion 9. The shape of the cushion 9 is not limited to the above shape, and may be an annular band or a tube having a circular outer periphery as long as the hole is square. The thickness (axial length) of the cushion 9 is preferably about 1 to 10 cm from the viewpoint of airtightness and fastening workability. In addition, a square ring cushion having a circular or elliptical cross section along the axial direction (vertical direction) can also be used, but the cushion 9 having a rectangular cross section as in this embodiment has a flat outer periphery, It is advantageous in that the winding work is difficult to fail. When a guide groove for receiving the strip member is provided on the outer periphery of the cushion 9, the winding work is facilitated. The width (horizontal direction) of the cushion 9 is preferably about 5 mm to 5 cm. When the elastic material forming the cushion is highly deformable or stretchable, the inner diameter can be made to correspond to the square outer circumference of the porous unit even with a round inner diameter such as an annulus or a torus body (donut shape).

  The support base 117 for mounting the porous unit has a water-permeable and air-permeable support plate 119 and a leg part 121. The leg part 121 is formed in a box shape with the upper side opened and supported. The plate 119 is fixed inside the leg portion 121 so as to be supported horizontally. The lower part of the side wall of the leg part 121 has a hole through which the air guide tube 113 penetrates and a water passage hole 123 that communicates the inside and outside of the leg part 121. The shape of the support plate 119 is a square having a size corresponding to the horizontal cross section of the porous unit, and using a water-resistant material having a strength that can withstand the load of the porous unit, a mesh shape, a screen shape having slits, and a through hole It is manufactured in a form appropriately selected from a thick plate or the like having a perforated hole. Since the position of the support plate 119 is set to the same height as the upper edge of the water storage tank 115, the porous units 5A and 5B placed on the support plate 119 are always above the water level in the water storage tank. Maintained. The upper part of the leg part 121 extends upward from the support plate 119 and acts as a positioning unit for the porous unit, thereby preventing lateral displacement of the porous units 5A and 5B placed on the support plate 119. The leg 121 may be a square tube without a bottom surface. In addition, the horizontal plate may be formed in a tubular shape by passing the horizontal plate over the four rod legs or the frame. In this case, the lower end of the horizontal plate is shortened so as to be immersed below the water surface, A configuration having a slit or a window may be used.

  The top portion 101 is horizontal to the top plate 125 having the air vents 23, the square tubular duct 127 fixed to the lower surface of the top plate 125, the water conduit 111 penetrating one side surface of the duct 127, and the lower end of the duct 127. And a distributor 17 attached to the main body. The distributor 17 in this embodiment is formed of a water-permeable porous material formed into a flat plate shape, and water supplied from the water conduit 111 penetrates into the porous material and is dispersed and dropped from the whole. The distributor 17 may be used in a state where it is placed on the porous unit 5 </ b> A without being attached to the duct 127. Alternatively, the distributor 17 may be a perforated pipe used in the absorption tower of FIG. 2 or a shallow rectangular container having a large number of small water passage holes in the entire bottom. The gantry 109 has a rectangular parallelepiped frame 129, a pair of locking members 131 for locking the top portion 101, and a roof 133, and the locking members 131 are on the side of the frame 129 at the same height. The column is fixed horizontally and in parallel.

  The absorption tower 100 is assembled as follows. First, the central portion 103 and the bottom portion 105 are assembled. Specifically, a support base 117 for supporting the gas-liquid contact layer is installed in the water storage tank 115, and the porous units 5A and 5B held by the cushion 9 are stacked vertically to support the support plate 117. Place on 119 as a gas-liquid contact layer.

  Next, the jacket 7 is put on the porous units 5A and 5B. Position the outer cover 7 in the vertical direction so that the lower end of the outer cover 7 is submerged in the water and the upper end of the outer cover 7 extends above the porous unit so that there is a surplus that can be used for connection with the top portion 101. Then, the outer cover 7 is wound around the cushion 9 using a strip member 8 such as a string or a metal wire. In the role as a gasket between the jacket and the porous unit, it is sufficient that at least one cushion 9 is provided in the entire gas-liquid contact layer. As a holding tool of the porous unit, at least one cushion 9 is provided per unit. I just need it. In this embodiment, one porous unit is held by a plurality of cushions 9. When a plurality of fastening portions are stacked in this way, satisfactory closing performance can be obtained as a whole even if sealing by fastening on each cushion is not complete. When a plurality of cushions 9 are used, the widths (horizontal directions) of the cushions 9 may be the same or different, and it is only necessary to obtain good sealing performance as a whole even if the sealing efficiency differs depending on the different widths. The lowermost cushion 9a is fitted to the upper end portion of the support base 117 surrounding the lower end of the porous unit 5B, whereby the outer cover 7 and the support base 117 are hermetically connected, and the support base 117 and the outer cover 7 are sealed. It is possible to prevent the gas G from leaking through the gap.

  Further, the top portion 101 is assembled as shown in FIG. For this reason, since the position of the top portion 101 needs to be fixed, a gantry 109 as shown in FIG. 11B is installed, and the assembled central portion 103 and bottom portion 105 are placed at the center of the gantry 109. Arrange to position. The position of the top portion 101 is fixed by placing the top plate 125 of the top portion 101 on the locking member 131 and supporting the top portion 101 with the mount 109. The top portion 101 supported on the locking member 131 is positioned at a height at which the distributor 17 is disposed immediately above the porous unit 5A. Thereafter, the outer cover 7 fastened to the porous units 5 </ b> A and 5 </ b> B is connected to the top part 101 by the strip member 8. Specifically, a cushion 9b is fitted to the lower part of the duct 127, the lower end of the duct 127 is surrounded by the upper end of the outer cover 7, and the outer cover 7 is wound on the cushion 9b by the strip member 8. As shown in FIG. 9, the outer jacket 7 is hermetically connected to the top portion 101.

  Since the gantry 109 of this embodiment is constituted by a rectangular parallelepiped frame, it is efficient to assemble the center portion 103 and the bottom portion 105 in the gantry 109, but is not limited to this gantry. For example, the position of the top portion 101 may be fixed using a stand that suspends the top portion 101, and the stand can be installed after the center portion 103 and the bottom portion 105 are assembled. In addition, if the mount 109 or the stand that can change / adjust the height of the locking member 131 is used, it is possible to respond to changes in the height of the porous unit (the number of stacked stages, the height of the plug-in member 1 and the sponge material 3). By simply adjusting the length of the outer jacket 7, the changed absorption tower can be assembled.

  The basic assembly is completed by installing the pump 13 in the water storage tank 115 and connecting the pump 13 and the water conduit 111 with a circulation line. Further, as shown in FIG. 9, a level meter 75 for detecting the water level of the water storage tank 115 is attached to the gantry 109 and is electrically connected to the pump 13 so as to control the driving of the pump 13 according to the detected water level. Then, the water level in the water storage tank 115 being processed can be maintained at a predetermined level. If a level switch is used instead of the level meter, it is possible to prevent the water level from dropping below a predetermined level, so that the pump can be prevented from idling.

  In the absorption tower 100 assembled as shown in FIG. 9, when water is introduced into the water storage tank 115 and microorganisms are supported on the sponge material 3, a biological deodorization process is possible. Similarly to the above, the microorganisms can be supported in advance on the sponge material 3 before assembly or by using water circulation after assembly. When the pump 13 is driven, the water W pumped up from the water storage tank 115 is supplied to the distributor 17 from the water conduit 111 through the circulation line, and is distributed and sprayed over the entire porous unit 5A. The water flowing down through the porous units 5A and 5B passes through the support plate 119 and falls into the water storage tank 115. The microorganisms carried on the sponge material 3 are propagated by the circulation of water. On the other hand, when the gas G is introduced into the inside of the support base 117 from the air guide tube 113 using a blower or a fan (not shown), the gas G passes through the support plate 119 and rises in the porous units 5A and 5B. In the gas-liquid contact with the water W, the odorous substance contained in the gas is absorbed by the water. The purified gas G ′ passes through the duct 127 and is discharged from the vent 23. Exhaust from the duct 127 may be promoted by connecting a suction blower or the like to the vent 23.

  Since the jacket 7 is wound and tightly attached to the support base 117 and the duct 127 via the cushions 9 a and 9 b, the gas flow is restricted by the jacket 7. That is, the gas G supplied from the support base 117 is guided by the jacket 7 so as to surely pass through the porous units 5A and 5B and reach the duct 127. Accordingly, the support base 117, the outer jacket 7, and the duct 127 function in the same manner as the main body tank 11 of FIG. 2, and gas is appropriately introduced into the gas-liquid contact layer contained therein.

  In the eighth embodiment, as in the absorption tower of FIG. 5, the gas can be changed to be supplied from the vent 23 at the top of the absorption tower 100 and flow downward.

  If the absorption tower is configured as in the eighth embodiment, the weight can be reduced and the material cost can be reduced, and since the design can be easily changed, the change can be made according to the installation conditions of the absorption tower. High nature. Since the role of the gantry 109 is only to support the top portion 101, the structure may be simplified so as to specialize only in the support function, or conversely, other functions may be added as necessary. For example, the side surface may be covered with a light-shielding plate or a light-shielding film to provide light-shielding properties, or a roof 133 may be configured using a solar panel and used for supplying driving energy such as a pump. In addition, the degree of freedom in changing the design of the appearance is extremely high. For example, even if various decorations are applied to the frame of the gantry, the essential functions are not affected at all.

  A plurality of embodiments can be appropriately selected from the above-described embodiments as necessary and used in combination.

  Hereinafter, the present invention will be described in detail with reference to examples.

(Example)
In the apparatus according to the absorption tower 10 shown in FIG. 2, a sponge material having a thickness of 25 mm, a height of 430 mm, and a length of 190 mm formed of polyurethane ether foam having a porosity of about 95% by volume and having open cells with a pore diameter of about 2 mm. 3 and the porous unit 5A is formed by using the insertion member 1 having a curved shape of a polyvinyl chloride flat plate having a thickness of 0.5 mm and an amplitude of 10 mm and a period (distance from valley to valley) of 70 mm. However, the unit 5B was omitted and attached to the absorption tower 10. Here, since four sponge materials 3 and three insertion members 1 are used, the plan view of the porous unit is not square.

A group of microorganisms containing sulfur-oxidizing bacteria acclimatized with sulfide from activated sludge as microorganisms is supplied to the bottom water W, and ammonium chloride, phosphorus as nutrient salts necessary for the growth of the microorganisms in the water W stored at the bottom of the main body tank 11 While adding potassium acid and magnesium sulfate, circulating with a pump and spraying it on the porous unit, the gas G containing hydrogen sulfide having a concentration of 800 ppm as an odor substance is 2 L / min with respect to the total volume of 10 L of the porous unit 5A. It introduce | transduced in the main body tank 11 from the vent 21 at the supply speed. When the hydrogen sulfide concentration of the gas G ′ discharged from the vent 23 was measured, the average was 36 ppm (32 ppm and 40 ppm). The sponge material 3 maintained the same height as when it was inserted, and was suitably sandwiched without causing crushing or sinking. Sulfur-oxidizing bacteria present in sponge cubes equivalent to sponge material 3 soaked in the same water W were measured using Starkey agar medium (see: Soil Microbial Experimental Method Study Group, “New Soil Microbial Experimental Method” (1992), 322-325, page 394, published by Yokendo Co., Ltd.), it was 1.9 × 10 ⁷ cfu (number of colonies) per 1 cm ^{3 of} sponge. Therefore, in the absorption tower 10, it is clear that the sponge material 3 is prevented from being crushed and sinking, and the sponge material 3 can be loaded with sulfur-oxidizing bacteria at a high density, which is effective for biological deodorization.

(Reference example)
Instead of the porous unit 5A, the above operation was performed in the same manner as in Example except that 10 L of a hollow cylindrical plastic filler having an outer diameter of 30 mm and a length of 30 mm was packed and attached to the absorption tower 10. When the hydrogen sulfide concentration of the gas G ′ discharged from the vent 23 was measured, the average was 67 ppm (64 ppm and 70 ppm).

(Comparative example)
The above-described operation was performed in the same manner as in Example except that the insertion member 1 was not used and the sponge material was a cube having a side of 20 mm and was stacked in the same volume as the porous unit 5A. However, the sponge material subducted after one month, and the bottom part was crushed, making it difficult to vent.

  Absorption tower that can prevent the decrease in absorption efficiency by maintaining the shape of the porous material for a long time is provided, and the absorption efficiency of odorous substances and the decomposition efficiency by microorganisms can be maintained for a long time by taking advantage of sponge material A biological deodorization device can be provided, which is useful for reducing the frequency of maintenance, increasing the service life, and improving the operability of the treatment device used in exhaust gas treatment and environmental purification.

1, 1a, 1b, 1c: Insertion member, 3: Sponge material,
5A, 5B, 5A ′, 5B ′, 65A, 65B: porous unit,
7: outer cover, 8: strip member, 9, 9a, 9b: cushion,
10, 30, 40, 50, 60, 70, 90, 100: absorption tower, 11, 31: main body tank,
13, 77: pump, 15: circulation line, 17: distributor,
19: Through-hole, 21, 23: Vent, 25A, 25B, 91, 119: Support plate,
33: expansion part, 61: support rod, 71: conduit, 73: water supply pipe,
75: Level meter, 79: Diffuser, 81: Blower,
101: Top part, 103: Center part, 105: Bottom part, 107: Main structure,
109: frame, 111: water conduit, 113: air conduit, 115: water tank,
117: Support stand 121: Leg part 123: Water passage hole 125: Top plate
127: Duct, 129: Frame, 131: Locking member, 133: Roof,
G, G ′: Gas, W: Water.

Claims (18)

A liquid supply device that supplies a liquid to the gas-liquid contact layer; a gas supply unit that supplies a gas to the gas-liquid contact layer; and the liquid and the gas in the gas-liquid contact layer An absorption tower that allows the liquid to absorb a predetermined component contained in the gas by contact with the gas,
The gas-liquid contact layer includes a plurality of flat plate-like or sheet-like porous materials arranged in parallel in a standing position, and a plurality of insertions that are alternately placed in contact with the plurality of porous materials to sandwich the porous material. And the insertion member has an uneven surface shape, and the unevenness forms a gap through which the gas can pass between the porous material and the insertion member.   The absorption tower according to claim 1, wherein the porous material is a sponge material having continuous pores having a pore diameter of 500 μm to 3 mm and a porosity of 90% by volume or more.   The said insertion member is made of a rigid material, has shape retention, and has a height and a length substantially the same as those of the porous material in order to sandwich the entire porous material. 2. The absorption tower according to 2.   The insertion member is at least one selected from the group consisting of a plate-like member curved or bent in a corrugated or bellows shape, and a straight plate member having a protrusion or groove on the surface, and the gap extends in the vertical direction. The absorption tower according to any one of claims 1 to 3.   The plurality of porous materials and the plurality of insertion members constitute a plurality of porous units in which the porous materials and the insertion members are alternately contacted and arranged, and the plurality of porous units are in the vertical direction. The absorption tower according to claim 1, which is disposed in   6. The absorption tower according to claim 5, wherein in the plurality of sets of porous units, the parallel direction of the porous material and the insertion member is arranged so as to be vertical in the upper and lower porous units.   The pre-air liquid supply device has a distributor for spraying the liquid to the gas-liquid contact layer, and a circulation line for returning the liquid discharged from the gas-liquid contact layer to the distributor, in the gas-liquid contact layer, The absorption tower according to claim 1, wherein the liquid and the gas move in opposite directions.   Furthermore, a storage tank that stores the liquid that has passed through the gas-liquid contact layer, a level meter that detects a liquid level in the storage tank, and a liquid in the storage tank based on the liquid level detected by the level gauge The absorption tower according to claim 1, further comprising a pump for replenishing water.   Furthermore, the absorption tower in any one of Claims 1-8 which has a box-shaped tank with which the said gas-liquid contact layer is mounted | worn inside.   Furthermore, it has a flexible jacket containing the gas-liquid contact layer, the jacket has two openings, and the liquid and the gas are supplied from either one of the two openings, respectively. The absorption tower according to claim 1, which is discharged from the other.   The envelope is formed in a tubular shape with a soft sheet that is impermeable to gas and liquid, and the two openings of the envelope are located above and below the gas-liquid contact layer, The absorption tower according to claim 10, wherein liquid is supplied by a liquid supply device, gas is supplied from the lower opening by the gas supply unit, and is guided to the gas-liquid contact layer by the jacket.   The absorption tower according to claim 10 or 11, wherein the jacket is formed of a sheet material that is transmissive to light.   The absorption tower according to any one of claims 10 to 12, wherein a space between the outer cover and a side surface of the gas-liquid contact layer is blocked to suppress a gas flow.   14. The outer cover is fastened around the gas-liquid contact layer using a strip member, and the outer cover and the gas-liquid contact layer are tightly closed in a circular manner. The absorption tower according to 1.   Furthermore, it has an elastic member that goes around the side surface of the gas-liquid contact layer, and the jacket is fastened on the elastic member by a strip member, and the gas-liquid contact layer and the The absorption tower according to claim 14, wherein airtightness between the outer cover and the outer cover is improved.   The elastic member has an annular band shape or a tubular shape having a hole portion into which the gas-liquid contact layer can be fitted, and the gas-liquid contact layer is fitted into the hole portion to thereby form the plurality of porous materials and the plurality of porous members. The absorption tower according to claim 15, wherein the insertion members are integrally fixed.   It has an absorption tower in any one of Claims 1-16, The said gas-liquid contact layer hold | maintains the microorganisms which can decompose | disassemble an odor substance, The said liquid is water, and is contained in gas as the said predetermined component A biological deodorization apparatus that absorbs odorous substances in water and decomposes them using the microorganisms.   The biological deodorization apparatus according to claim 17, wherein the porous material is made of polyurethane ether foam, and the microorganism includes sulfur-oxidizing bacteria or ammonia-oxidizing bacteria.

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