WO2008023659A1 - Apparatus for treating organic-containing gas and method of treating the same - Google Patents

Apparatus for treating organic-containing gas and method of treating the same Download PDF

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Publication number
WO2008023659A1
WO2008023659A1 PCT/JP2007/066107 JP2007066107W WO2008023659A1 WO 2008023659 A1 WO2008023659 A1 WO 2008023659A1 JP 2007066107 W JP2007066107 W JP 2007066107W WO 2008023659 A1 WO2008023659 A1 WO 2008023659A1
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Prior art keywords
gas
activated carbon
organic
organic matter
organic substance
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PCT/JP2007/066107
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French (fr)
Japanese (ja)
Inventor
Kenji Nakashima
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Kenji Nakashima
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Publication of WO2008023659A1 publication Critical patent/WO2008023659A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/44—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B01D53/82—Solid phase processes with stationary reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/34—Specific shapes
    • B01D2253/342—Monoliths
    • B01D2253/3425—Honeycomb shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water

Definitions

  • the present invention relates to an organic substance-containing gas processing facility and a processing method thereof, and more particularly to an organic substance-containing gas processing facility and a processing method thereof, which mainly process a gas containing a low concentration and a large amount of a hydrophilic organic substance.
  • Patent Document 1 A method using fibrous activated carbon instead of granular activated carbon has been considered (for example, Patent Document 1). This method also has a problem that workability is inferior because it cannot withstand long-term use, which is likely to be clogged by dust in the processing gas with high ventilation resistance, and requires frequent maintenance and inspection.
  • Patent Document 2 As a method for reducing the airflow resistance, a method using honeycomb-like activated carbon is also considered (for example, Patent Document 2).
  • the above-described conventional method using the honeycomb-shaped activated carbon reaches the explosion limit depending on the organic matter when the heated hot air to be dried is supplied after passing water vapor to collect the adsorbed organic matter. Therefore, the inventors of the present application have invented an organic substance-containing gas treatment facility and a treatment method for solving the problem (Patent Document 3).
  • Patent Document 1 Japanese Patent Laid-Open No. 11239723
  • Patent Document 2 Japanese Patent Laid-Open No. 10-216477
  • Patent Document 3 Japanese Patent Laid-Open No. 2006-88102
  • the moisture contained in the organic solvent recovered by the above-mentioned conventional processing equipment is also affected by the relative humidity in the atmosphere, and even when the relative humidity is low, the dissolved moisture contained in the organic solvent is 1.5. It is contained in an amount of about% by weight, usually about 2 to 3% by weight.
  • the object of the present invention is to the extent that bleeding does not easily occur even when a gas containing a hydrophilic organic substance is recovered and the organic substance is reused for printing ink. Contained (dissolved) water content can be drastically reduced, so it is possible to effectively absorb and desorb gas containing low concentrations and large amounts of organic matter and efficiently recover organic matter, and to explode. It is an object of the present invention to provide an organic substance-containing gas treatment facility and a treatment method capable of reliably preventing this.
  • the characteristic configuration of the organic substance-containing gas processing facility according to the present invention includes a dehumidifying mechanism for removing moisture contained in the gas to be processed containing organic substances, and an organic substance in the dehumidified gas to be adsorbed and removed.
  • heated gas supply device for supplying heated inert gas to desorb organic substances adsorbed by the activated carbon adsorbing device from activated carbon
  • the object of the present invention is to have a cooling device that cools and dehydrates the organic matter desorbed by the heated inert gas to less than zero degrees, and a recovery device that recovers the dehydrated organic matter.
  • the moisture in the organic matter contained in the inert gas can be removed by the cooling device that cools and dehydrates at a low rate, so the moisture in the collected organic matter can be sufficiently reduced, and the gas containing hydrophilic organic matter is recovered.
  • the cooling device that cools and dehydrates at a low rate, so the moisture in the collected organic matter can be sufficiently reduced, and the gas containing hydrophilic organic matter is recovered.
  • the activated carbon adsorption device uses honeycomb-like activated carbon, the ventilation resistance can be reduced and the adsorption rate is high, so that it is efficient even when processing a large amount of low-concentration gas.
  • An inert gas is allowed to flow to desorb the organic matter adsorbed on the substrate, so that the desorbed organic matter can be prevented from igniting and the explosion can be reliably prevented, and the organic matter can be easily recovered. Therefore, large-scale equipment such as a distillation tower is not required.
  • nitrogen is used for desorption of organic substances, water treatment is not necessary compared to the case of using water vapor as in the prior art.
  • the dehumidifying mechanism has a precooler configured with a heat exchanger that receives supply of refrigerant, and a dehumidifying device that follows the precooler, and the dehumidifying device is rotatable in the cylindrical container.
  • the molecular sieves or zeolite are composed of honeycomb rotors arranged in a honeycomb shape.
  • the gas to be processed cooled to a low temperature by the precooler is further added to the moles. Since the molecular sieves or zeolite are dehumidified by the honeycomb rotor arranged in the form of honeycomb, and a stable low dew point is sent to the downstream side, each device installed on the downstream side makes the moisture in the organic matter Is more reliably removed and reduced.
  • the inert gas is nitrogen, and the nitrogen is heated and sent to the activated carbon adsorption device to desorb organic matter, and the desorbed organic matter is sent to the cooling device. It is preferable to heat up the route to be fed and to introduce nitrogen! /, Nitrogen! /
  • the organic substance-containing gas treatment method according to the present invention is characterized in that the moisture contained in the gas to be treated containing organic substances is removed by a dehumidifying mechanism, and the organic matter in the gas to be treated that has been dehumidified is removed.
  • the organic substance desorbed by the inert gas is to be dehydrated by freezing to below zero degree with a cooling device, and the dehydrated organic substance is recovered.
  • Moisture removal in the gas to be treated by the dehumidifying mechanism is performed by passing the gas to be treated through a precooler configured from a heat exchanger that receives a refrigerant and a dehumidifier following the precooler, It is made up of a honeycomb rotor in which molecular sieves or zeolite are arranged in a honeycomb shape so that it can rotate in a cylindrical container!
  • each device disposed on the downstream side of the dehumidifying mechanism can more reliably remove and reduce water in the organic matter.
  • FIG. 1 is a schematic overall flow diagram of an organic substance-containing gas processing facility according to an embodiment of the present invention.
  • FIG. 1 shows a schematic overall configuration of an organic substance-containing gas processing facility according to this embodiment.
  • FIG. 1 shows a schematic structure of the organic substance-containing gas treatment facility. That is, the gas to be processed (organic substance-containing gas) generated by various chemical fields and the like is fed by the feed fan 1 to the precooler 2a and the subsequent dehumidifier 2b constituting the dehumidifying mechanism 2. The gas to be treated whose moisture has been dehumidified by the dehumidifying mechanism 2 is sent to an activated carbon adsorption device 4 that adsorbs and removes organic substances.
  • the gas to be processed organic substance-containing gas generated by various chemical fields and the like is fed by the feed fan 1 to the precooler 2a and the subsequent dehumidifier 2b constituting the dehumidifying mechanism 2.
  • the gas to be treated whose moisture has been dehumidified by the dehumidifying mechanism 2 is sent to an activated carbon adsorption device 4 that adsorbs and removes organic substances.
  • this organic matter-containing gas treatment facility is equipped with a device 5 for supplying heated inert gas to desorb the organic matter adsorbed by the activated carbon adsorbing device 4 from the activated carbon, and a degassing by the heated inert gas.
  • the apparatus includes a cooling device 6 that cools the separated organic matter to below zero degree and dehydrates it, a recovery device 7 that collects the dehydrated organic matter, and the like.
  • the precooler 2a is constituted by a heat exchanger, and the refrigerant is supplied from the blownler 10. In this heat exchanger, the refrigerant is fed and circulated through the pipe 11 by the pump P1 from the blower 10 that cools the refrigerant (brine) sent from the brine storage tank T.
  • the dehumidifying device 2b following the precooler 2a includes, for example, a rotor (no, two-cam rotor) in which molecular sieves or zeolites arranged in a honeycomb shape are rotatably accommodated in a cylindrical container.
  • the gas to be treated passes through the slow rotation (for example, about 10 revolutions / hour), so that the moisture in the gas to be treated is removed while the gas is removed in a sealed and separated path.
  • the slow rotation for example, about 10 revolutions / hour
  • warm air about 110 to 150 ° C.
  • a regeneration fan not shown
  • the power S can be adjusted to bring the gas to be treated to a stable low dew point (eg, 30 ° C or less).
  • a prefilter made of various types of commercially available dust removing filters or the like may be disposed in advance.
  • the gas to be treated that has passed through the dehumidifying mechanism 2 is sent to a plurality of activated carbon adsorption devices 4 through a control valve 3.
  • a control valve 3 In FIG. 1, two activated carbon adsorption devices 4 are arranged in parallel, and in this way, one can be used for adsorption and the other can be used for desorption / regeneration.
  • the number of activated carbon adsorption devices 2 may be one or more, and the number, specifications, etc., may be selected appropriately depending on the amount of gas to be treated and the characteristics.
  • the activated carbon adsorbing device 4 is filled and fitted with honeycomb-like activated carbon and does not use granular activated carbon or fibrous activated carbon as in the prior art. Therefore, the activated carbon adsorbing device 4 has a small ventilation resistance. It is characterized by low pressure loss and high adsorption capacity. Since the pressure loss of the honeycomb-like activated carbon is small, the power source of the feeding fan 1 can be small and consumes less energy.
  • the activated carbon adsorbing device 4 may have various configurations. For example, the activated carbon adsorbing device 4 is configured by stacking about 90 to 450 mm of honeycomb-shaped activated carbon on a unit having a perforated plate and a fluid jacket.
  • honeycomb specific surface area of activated carbon about 200 ⁇ 3000m 2 / it is preferable to g using of about instrument about 300 ⁇ 2500m 2 / g approximately and more preferably tool 400 to use a It is even more preferable to use a material of about ⁇ 2000 m 2 / g.
  • the through-holes of the honeycomb-like activated carbon are not limited to hexagonal shapes, and may be various shapes such as square, rectangle, polygon, circle, and substantially circle.
  • There are many through holes (cells) It is preferable that the amount of contact with the number of treatments is large and the adsorptive capacity is high. However, when the number of pores is too large, the pressure loss increases and the manufacturing becomes difficult and the cost increases. Accordingly, the number of the through holes is about 15 to 2326/10 cm 2 force S, preferably about 30 to about 1550/10 cm 2 , more preferably about 39 to about 1162/10 cm 2 .
  • the method for producing the honeycomb-shaped activated carbon is not particularly limited.
  • the activated carbon raw material is added with a binder, formed into a honeycomb shape, activated by carbonization, and then washed with an acid if necessary.
  • the activated carbon itself is formed into a honeycomb and then dried and fired.
  • the treated exhaust gas from which the organic matter has been adsorbed and removed by the activated carbon adsorbing device 4 is then released into the atmosphere via the control valve 5, and the organic matter remaining in the treated exhaust gas is not less than the emission standard value. In this case, it is discharged after further detoxification treatment.
  • a device for separating and collecting the organic matter adsorbed on the honeycomb-like activated carbon is provided on the downstream side of the activated carbon adsorption device 4.
  • the relationship between the linear flow velocity (LVa) of the gas to be treated that flows through the honeycomb-shaped activated carbon and the linear velocity (LVb) of the gas when the organic matter is desorbed from the honeycomb-like activated carbon that has adsorbed the organic matter is important.
  • organic substances adsorbed on the honeycomb-like activated carbon can be efficiently desorbed.
  • a treatment gas containing an organic substance is passed through honeycomb activated carbon at a linear velocity of 30 to 300 cm / second, and desorption nitrogen is passed at 1/10 to 1 / 10,000 of this linear velocity.
  • the organic substance detachment from the honeycomb activated carbon adsorbing the organic substance is conventionally performed by supplying pressurized steam of about 1.9 atmospheres heated to about 130 ° C, and dried with hot air after the detachment.
  • the organic substance is benzene, toluene or xylene (so-called BTX) with a particularly low boiling point
  • BTX benzene, toluene or xylene
  • the explosion limit may be reached with the hot air sent for drying. For this reason, there was a problem that it was necessary to install explosion-proof equipment and other equipment that would be difficult to work with, such as careful attention.
  • nitrogen which is an inert gas
  • inert gas is heated to about 90 to 110 ° C, preferably about 100 ° C, and is sent. Yes.
  • other inert gas may be used instead of nitrogen.
  • nitrogen is fed from a nitrogen container (such as a gas cylinder or a liquid nitrogen container) 12 through a control valve to a heat transfer oil tank 7 by a nitrogen gas circulation fan 6, and heat is exchanged to form a honeycomb. Heated to a temperature slightly higher than the boiling point of the organic matter adsorbed on the activated carbon, flows through the pipe 20 and is sent to the activated carbon adsorption device 4 via the control valve 8.
  • the amount of heat in the heat transfer oil tank 7 can be obtained by heating directly or indirectly by attaching a heater 24 or the like.
  • the heat medium in the heat medium oil tank 7 is circulated by the pump P2 and maintained at a predetermined temperature.
  • the heat quantity in the heat transfer oil tank 7 may be supplied by using heat generated from other heat sources in the factory. It is not necessary to use the nitrogen gas circulation fan 6 to feed nitrogen, but other feeding means may be used.
  • the nitrogen container 12, the nitrogen gas circulation pump 6, the heat transfer oil tank 7, and the like constitute a heated gas feeding device.
  • the organic matter adsorbed on the honeycomb activated carbon of the activated carbon adsorbing device 4 is desorbed by heated nitrogen, and is fed together with nitrogen through the desorption nitrogen control valve 9 to the first cooler 13 to be cooled somewhat. .
  • the refrigerant is supplied and circulated from the first chiller unit 16 to the first cooler 13 by the heat exchanger cooling water circulation pump P3.
  • Figure 17 is a cooling water tank equipped with a supply pump P4 for storing cooling water to be sent to the first chiller unit 16.
  • the organic substance desorbed from the honeycomb-shaped activated carbon with heated nitrogen is introduced into the first cooler 13 through a pipe 21 that does not heat a part of nitrogen from the nitrogen container 12. Is preferred. In this way, the heat consumption in the first cooler 13 can be reduced, and the heat utilization rate of the entire equipment is increased, resulting in energy saving.
  • Figure 22 shows a cooling valve that controls the amount of cooling nitrogen introduced.
  • nitrogen containing organic matter is fed into a plurality of narrow tubes arranged inside the second cooler 14 to be cooled, and the organic matter is liquefied.
  • the second cooler 14 cools the nitrogen containing the organic matter to below zero degree, preferably below 10 ° C., so that the water in the nitrogen is frozen on the surface of the capillary tube and separated and removed.
  • two second coolers 14 may be arranged in parallel to increase the efficiency of moisture removal, or may be further increased.
  • FIG. 23 is a control valve that controls the nitrogen supply.
  • the liquid organic matter is further sent to a collection tank 15 such as a decanter and collected as a high-purity organic matter.
  • a collection tank 15 such as a decanter and collected as a high-purity organic matter.
  • the first and second coolers 13 and 14 constitute a cooling device
  • the decanter 15 constitutes a recovery device.
  • other recovery means that do not necessarily need to be the decanter 15 may be used.
  • the refrigerant is fed from the second chiller unit 18 via the heat exchanger 19, and is circulated by the brine circulation pump P5.
  • an exhaust gas containing ethyl acetate is treated as an organic substance-containing gas that is a gas to be treated.
  • the relative humidity in the atmosphere is approximately 60%, and the exhaust gas flow rate (approximately 300 Nm 3 / h) containing ethyl acetate (approximately 2000 ppm by weight) is reduced to 5 ° C or less with a precooler as shown in Fig. 1.
  • the dew point was lowered to 30 ° C. or less with a honeycomb rotor as a dehumidifying device, and the dew point was fed to the activated carbon adsorbing device 4 incorporating the honeycomb-like activated carbon for adsorption.
  • the activated carbon adsorbing device 4 includes about 20,000 honeycomb activated carbons and has a size of 3,000 ⁇ 4,500 ⁇ height of 1,000 mm. First cooling of the activated carbon adsorbed with ethyl acetate by passing nitrogen heated to about 100 ° C to desorb the ethyl acetate and cooling the nitrogen containing organic matter to about 15 ° C or less. And then a second cooler 14 cooled to about -10 ° C. The liquid ethyl acetate finally recovered from the decanter was about 137 kg / h (recovery rate about 97%), and the dissolved water contained in this ethyl acetate was 0.35% by weight.
  • the present invention can be discharged from various chemical industries, food industries, paper industries, pharmaceutical industries, etc.
  • the present invention can be widely applied when processing gas containing equipment.

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Abstract

An apparatus for treating an organic-containing gas. A gas containing a hydrophilic organic substance is recovered with the apparatus, and the organic substance can be greatly reduced in the content of (dissolved) water to such a degree that even when it is reused in a printing ink, ink running is less apt to occur. Despite this, a large amount of the organic-containing gas having a low concentration is effectively adsorbed and then desorbed to efficiently recover the organic substance. The apparatus can eliminate the risk of explosion without fail. Also provided is a method of treating the gas. The apparatus for organic-containing-gas treatment comprises: a dehumidifying mechanism (2) in which water contained in an organic-containing gas to be treated is removed; an activated-carbon adsorption device (4) packed with honeycomb activated carbon for adsorptively removing the organic substance in the dehumidified gas; heated-gas supply devices (6, 7, and 12) with which a heated inert gas is sent in order to separate the organic substance adsorbed with the activated-carbon adsorption device (4) from the activated carbon; cooling devices (13 and 14) in which the organic substance separated with the heated inert gas is cooled to 0 degree or lower to dehydrate it; and a recovery device (15) in which the dehydrated organic substance is recovered.

Description

明 細 書  Specification
有機物含有ガス処理設備とその処理方法  Organic substance-containing gas treatment facility and treatment method
技術分野  Technical field
[0001] 本発明は有機物含有ガス処理設備とその処理方法に関し、詳しくは、主として親水 性の有機物を低濃度かつ大量に含有するガスを処理する有機物含有ガス処理設備 とその処理方法に関する。  [0001] The present invention relates to an organic substance-containing gas processing facility and a processing method thereof, and more particularly to an organic substance-containing gas processing facility and a processing method thereof, which mainly process a gas containing a low concentration and a large amount of a hydrophilic organic substance.
背景技術  Background art
[0002] 従来、有機溶剤、 VOC (揮発性有機化合物）、その他の有機化合物を含むガスを 処理するには、粒状活性炭を充填した充填槽に通流させて、有機物を粒状活性炭 に吸着させた後、多量の水蒸気を通流させ有機物を加熱 '脱離させて回収したり、焼 却したりする方法が知られている。しかし、粒状活性炭に吸着させる方法は、ガスの 線流速が 10〜30cm/秒、粒状活性炭の充填高さが 100〜300cm程度であり、粒 状活性炭の開口率が低ぐ通気抵抗が大きいため、通流されるガスの接触効率が低 という問題がある。  Conventionally, in order to treat gases containing organic solvents, VOC (volatile organic compounds), and other organic compounds, they were passed through a filling tank filled with granular activated carbon, and the organic matter was adsorbed onto the granular activated carbon. Thereafter, a method is known in which a large amount of water vapor is passed through and the organic substance is recovered by heating and desorption, or incinerated. However, the method of adsorbing to granular activated carbon is that the linear flow rate of gas is 10 to 30 cm / second, the filling height of granular activated carbon is about 100 to 300 cm, and the opening ratio of granular activated carbon is low and the ventilation resistance is large. There is a problem that the contact efficiency of the gas to be passed is low.
[0003] つまり、活性炭が粒状であると、ガスの流れにムラが生じ易ぐ吸着ムラに伴って、 充填層内部で局部的に発熱して、吸着性能が低下し、活性炭に吸着した有機物が 脱離し始めたりするだけでなぐ発熱するおそれもある。しかも、吸着した有機物を脱 離させるために、加熱空気などのような酸素を含む加熱ガスを通流させると、局部的 な発熱が生じて有機物が発火し、粒状活性炭が燃焼するおそれがある。のみならず 、繰り返し使用する間に、粒状活性炭から微粉が生じて、 目詰まりを生じ易くなり、通 気抵抗が急激に増加することがあるという問題がある。  [0003] That is, when activated carbon is granular, unevenness in gas flow is likely to occur, and heat is locally generated inside the packed bed, resulting in reduced adsorption performance, and organic substances adsorbed on the activated carbon are reduced. There is also a risk of generating heat just by starting to detach. Moreover, if a heated gas containing oxygen, such as heated air, is passed to desorb the adsorbed organic matter, local heat generation may occur, the organic matter may ignite, and the granular activated carbon may burn. In addition, there is a problem in that fine powder is generated from the granular activated carbon during repeated use, which tends to cause clogging, and the air resistance may increase rapidly.
[0004] 粒状活性炭に代えて、繊維状活性炭を使用する方法が考えられている（例えば、 特許文献 1)。この方法も、通気抵抗が大きぐ処理ガス中の粉塵によって目詰まりを 生じ易ぐ長期間の使用に耐えず、頻繁に保守点検を行う必要があり、作業性は劣る という問題がある。  [0004] A method using fibrous activated carbon instead of granular activated carbon has been considered (for example, Patent Document 1). This method also has a problem that workability is inferior because it cannot withstand long-term use, which is likely to be clogged by dust in the processing gas with high ventilation resistance, and requires frequent maintenance and inspection.
[0005] 通気抵抗を小さくする方法として、ハニカム状活性炭を用いる方法も考えられてい る（例えば、特許文献 2)。 [0006] 上記従来のハニカム状活性炭を使用する方法は、吸着した有機物を回収するため 水蒸気を通流させた後、乾燥させるベく熱風を送給させた場合に、有機物によっては 爆発限界に達して爆発すると言う問題があるため、本願発明者らは、かかる問題を解 決した有機物含有ガス処理設備とその処理方法の発明をした (特許文献 3)。 [0005] As a method for reducing the airflow resistance, a method using honeycomb-like activated carbon is also considered (for example, Patent Document 2). [0006] The above-described conventional method using the honeycomb-shaped activated carbon reaches the explosion limit depending on the organic matter when the heated hot air to be dried is supplied after passing water vapor to collect the adsorbed organic matter. Therefore, the inventors of the present application have invented an organic substance-containing gas treatment facility and a treatment method for solving the problem (Patent Document 3).
[0007] 特許文献 1 :特開平 11 239723号公報  [0007] Patent Document 1: Japanese Patent Laid-Open No. 11239723
特許文献 2 :特開平 10— 216477号公報  Patent Document 2: Japanese Patent Laid-Open No. 10-216477
特許文献 3 :特開 2006— 88102号公報  Patent Document 3: Japanese Patent Laid-Open No. 2006-88102
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0008] ところ力 この有機物含有ガス処理設備を印刷工場などで使用して、排ガス中の有 機溶剤を回収して再利用しょうとした場合、次のような問題が生じる。つまり、有機溶 剤として、トルエンなどの非親水性溶剤に代えて、より毒性の低!/、親水性の有機溶剤 (例えば、酢酸ェチル、メチルェチルケトン、イソプロピルアルコール等）が多用される ようになつており、その際、有機溶剤中に少なくない水分を含むため、この有機溶剤 を印刷インクに使用すると、印刷面にインクの滲みが生じる。もっとも、上記従来の処 理設備により回収された有機溶剤に含有する水分は、大気中の相対湿度の多寡に も影響され、相対湿度が低い場合でも、有機溶剤に含有する溶存水分は 1. 5重量 %程度含まれており、通常は、 2〜3重量％程度含まれる。  [0008] However, when this organic-containing gas treatment facility is used in a printing factory or the like to recover and reuse the organic solvent in the exhaust gas, the following problems arise. In other words, as organic solvents, instead of non-hydrophilic solvents such as toluene, less toxic / hydrophilic organic solvents (for example, ethyl acetate, methyl ethyl ketone, isopropyl alcohol, etc.) are often used. At this time, since the organic solvent contains a large amount of moisture, if this organic solvent is used for the printing ink, ink bleeding occurs on the printing surface. However, the moisture contained in the organic solvent recovered by the above-mentioned conventional processing equipment is also affected by the relative humidity in the atmosphere, and even when the relative humidity is low, the dissolved moisture contained in the organic solvent is 1.5. It is contained in an amount of about% by weight, usually about 2 to 3% by weight.
[0009] そこで、本発明の目的は、上記従来技術の有する問題点に鑑みて、親水性の有機 物を含むガスを回収して、有機物を印刷インクに再利用したとしても滲みが生じ難い 程度に含有 (溶存)水分量を大幅に低減でき、それで!/、て低濃度かつ大量の有機物 を含むガスを効果的に吸着すると共に脱離させて有機物を効率的に回収すると共に 、爆発する危険性を確実に防止可能な有機物含有ガス処理設備とその処理方法を 提供することにある。  [0009] Therefore, in view of the above-mentioned problems of the prior art, the object of the present invention is to the extent that bleeding does not easily occur even when a gas containing a hydrophilic organic substance is recovered and the organic substance is reused for printing ink. Contained (dissolved) water content can be drastically reduced, so it is possible to effectively absorb and desorb gas containing low concentrations and large amounts of organic matter and efficiently recover organic matter, and to explode. It is an object of the present invention to provide an organic substance-containing gas treatment facility and a treatment method capable of reliably preventing this.
課題を解決するための手段  Means for solving the problem
[0010] 上記課題は、請求項記載の各発明により達成される。すなわち、本発明に係る有 機物含有ガス処理設備の特徴構成は、有機物を含有する被処理ガス中に含まれる 水分を除去する除湿機構と、除湿された被処理ガス中の有機物を吸着除去するため のハニカム状活性炭が充填 ·装着されて活性炭吸着装置と、この活性炭吸着装置に よって吸着された有機物を活性炭から脱離するため加熱された不活性ガスを送給す る加熱ガス供給装置と、この加熱された不活性ガスにより脱離された有機物を零度以 下に冷却して脱水する冷却装置と、脱水された有機物を回収する回収装置と、を有 することにある。 [0010] The above-described objects can be achieved by the inventions described in the claims. That is, the characteristic configuration of the organic substance-containing gas processing facility according to the present invention includes a dehumidifying mechanism for removing moisture contained in the gas to be processed containing organic substances, and an organic substance in the dehumidified gas to be adsorbed and removed. For Activated carbon adsorbing device filled with and loaded with honeycomb activated carbon, heated gas supply device for supplying heated inert gas to desorb organic substances adsorbed by the activated carbon adsorbing device from activated carbon, and this The object of the present invention is to have a cooling device that cools and dehydrates the organic matter desorbed by the heated inert gas to less than zero degrees, and a recovery device that recovers the dehydrated organic matter.
[0011] この構成によれば、活性炭吸着装置により被処理ガス中の有機物を吸着'除去す る前に、予め除湿機構によって水分を低減すると共に、不活性ガスにより脱離された 有機物を零度以下に冷却して脱水する冷却装置により、不活性ガスに含まれる有機 物中の水分を除去できるため、回収される有機物中の水分を十分に低減でき、たと え親水性の有機物を含むガスを回収して、有機物を印刷インクに再利用したとしても 滲みが生じ難い程度に含有 (溶存)水分量を確実に低減できる。しかも、活性炭吸着 装置にハニカム状活性炭を使用していることから、通気抵抗を小さくできると共に吸 着率が高いため、大量かつ低濃度のガスを処理する場合でも効率的であり、しかも ハニカム状活性炭に吸着した有機物を脱離するのに不活性ガスを通流するようにし ているので、脱離した有機物の発火を防止できると共に、爆発を確実に阻止できるの みならず、有機物の回収が容易であるため、蒸留塔など大掛かりな設備を必要としな い。もとより、窒素を有機物の脱離に使用するため、従来技術のように水蒸気を使用 する場合に比べて、水処理の必要がな!/、と!/、う利点をも有する。  [0011] According to this configuration, before the organic substance in the gas to be treated is adsorbed / removed by the activated carbon adsorption device, the moisture is reduced in advance by the dehumidifying mechanism, and the organic substance desorbed by the inert gas is reduced to zero degrees or less. The moisture in the organic matter contained in the inert gas can be removed by the cooling device that cools and dehydrates at a low rate, so the moisture in the collected organic matter can be sufficiently reduced, and the gas containing hydrophilic organic matter is recovered. Thus, even if organic substances are reused for printing ink, the amount of contained (dissolved) water can be reliably reduced to such a degree that bleeding is unlikely to occur. Moreover, since the activated carbon adsorption device uses honeycomb-like activated carbon, the ventilation resistance can be reduced and the adsorption rate is high, so that it is efficient even when processing a large amount of low-concentration gas. An inert gas is allowed to flow to desorb the organic matter adsorbed on the substrate, so that the desorbed organic matter can be prevented from igniting and the explosion can be reliably prevented, and the organic matter can be easily recovered. Therefore, large-scale equipment such as a distillation tower is not required. Of course, since nitrogen is used for desorption of organic substances, water treatment is not necessary compared to the case of using water vapor as in the prior art.
[0012] その結果、親水性の有機物を含むガスを回収して、有機物を印刷インクに再利用し たとしても滲みが生じ難い程度に含有水分量を大幅に低減でき、それでいて低濃度 かつ大量の有機物を含むガスを効果的に吸着すると共に脱離させて有機物を効率 的に回収すると共に、爆発する危険性を確実に防止可能な有機物含有ガス処理設 備を提供することができた。 As a result, even if the gas containing the hydrophilic organic substance is recovered and the organic substance is reused in the printing ink, the water content can be greatly reduced to such a degree that bleeding does not easily occur. It was possible to provide an organic substance-containing gas treatment facility that can effectively adsorb and desorb gas containing organic substances and efficiently recover the organic substances, and reliably prevent the risk of explosion.
[0013] 前記除湿機構が、冷媒の送給を受ける熱交換器力 構成されたプレクーラーと、こ れに続く除湿装置とを有しており、この除湿装置が円筒状容器内に回転可能に、モ レキユラーシーブスあるいはゼォライトがハニカム状に配置されたハニカムローターか ら構成されてレ、ることが好ましレ、。 [0013] The dehumidifying mechanism has a precooler configured with a heat exchanger that receives supply of refrigerant, and a dehumidifying device that follows the precooler, and the dehumidifying device is rotatable in the cylindrical container. It is preferable that the molecular sieves or zeolite are composed of honeycomb rotors arranged in a honeycomb shape.
[0014] この構成によれば、プレクーラーにより低温に冷やされた被処理ガスは、更にモレ キュラーシーブスあるいはゼォライトがハニカム状に配置されたハニカムローターによ つて除湿され、安定した低露点にされて下流側に送給されるため、下流側に配置さ れた各装置により、有機物中の水分が一層確実に除去され低減されることになる。 [0014] According to this configuration, the gas to be processed cooled to a low temperature by the precooler is further added to the moles. Since the molecular sieves or zeolite are dehumidified by the honeycomb rotor arranged in the form of honeycomb, and a stable low dew point is sent to the downstream side, each device installed on the downstream side makes the moisture in the organic matter Is more reliably removed and reduced.
[0015] 前記不活性ガスが窒素であり、この窒素を加熱して前記活性炭吸着装置に送給し て有機物を脱離するようになっていると共に、脱離された有機物を前記冷却装置に 送給する経路に、加熱してレ、な!/、窒素を導入するようになって!/、ることが好まし!/、。  [0015] The inert gas is nitrogen, and the nitrogen is heated and sent to the activated carbon adsorption device to desorb organic matter, and the desorbed organic matter is sent to the cooling device. It is preferable to heat up the route to be fed and to introduce nitrogen! /, Nitrogen! /
[0016] この構成によれば、窒素は安価であるため処理コストを低減でき、しかも処理設備 全体の熱利用率を高めて省エネルギーを実現できる。  [0016] According to this configuration, since nitrogen is inexpensive, the processing cost can be reduced, and the heat utilization rate of the entire processing equipment can be increased, and energy saving can be realized.
[0017] 又、本発明に係る有機物含有ガス処理方法の特徴構成は、有機物を含有する被 処理ガス中に含まれる水分を除湿機構により除去し、除湿された被処理ガス中の有 機物をハニカム状活性炭が充填 '装着されて活性炭吸着装置に導入して吸着除去 し、この活性炭吸着装置によって吸着された有機物を活性炭から脱離するため加熱 した不活性ガスを送給し、この加熱された不活性ガスにより脱離された有機物を冷却 装置により零度以下に凍結して脱水し、脱水された有機物を回収することにある。  [0017] Further, the organic substance-containing gas treatment method according to the present invention is characterized in that the moisture contained in the gas to be treated containing organic substances is removed by a dehumidifying mechanism, and the organic matter in the gas to be treated that has been dehumidified is removed. Filled with honeycomb-like activated carbon, installed and introduced into the activated carbon adsorption device for adsorption removal, heated inert gas was sent to desorb the organic matter adsorbed by the activated carbon adsorption device from the activated carbon, and this heated The organic substance desorbed by the inert gas is to be dehydrated by freezing to below zero degree with a cooling device, and the dehydrated organic substance is recovered.
[0018] この構成によれば、親水性の有機物を含むガスを回収して、有機物を印刷インクに 再利用したとしても滲みが生じ難い程度に含有水分量を大幅に低減でき、それでい て低濃度かつ大量の有機物を含むガスを効果的に吸着すると共に脱離させて有機 物を効率的に回収すると共に、爆発する危険性を確実に防止可能な有機物含有ガ ス処理方法を提供することができる。  [0018] According to this configuration, even if the gas containing the hydrophilic organic substance is recovered and the organic substance is reused in the printing ink, the moisture content can be significantly reduced to such a degree that bleeding is not likely to occur. To provide an organic substance-containing gas treatment method capable of efficiently adsorbing and desorbing a gas containing a large amount of organic substance at a high concentration and efficiently desorbing it, and reliably preventing the risk of explosion. it can.
[0019] 前記除湿機構による被処理ガス中の水分除去を、冷媒の送給を受ける熱交換器か ら構成されたプレクーラーと、これに続く除湿装置に前記被処理ガスを通して行い、 前記除湿装置が円筒状容器内に回転可能に、モレキュラーシーブスあるいはゼオラ イトがハニカム状に配置されたハニカムローターから構成されて!/、ること力 S好ましレ、。  [0019] Moisture removal in the gas to be treated by the dehumidifying mechanism is performed by passing the gas to be treated through a precooler configured from a heat exchanger that receives a refrigerant and a dehumidifier following the precooler, It is made up of a honeycomb rotor in which molecular sieves or zeolite are arranged in a honeycomb shape so that it can rotate in a cylindrical container!
[0020] この構成によれば、除湿機構の下流側に配置された各装置により、有機物中の水 分を一層確実に除去し低減できることになる。  [0020] According to this configuration, each device disposed on the downstream side of the dehumidifying mechanism can more reliably remove and reduce water in the organic matter.
[0021] 前記不活性ガスとして窒素を用い、この窒素を加熱して前記活性炭吸着装置に送 給して有機物を脱離すると共に、脱離された有機物を前記冷却装置に送給する経路 に、加熱してレ、な!/、窒素を導入することが好ましレ、。 [0022] この構成によれば、安価な窒素を用いて処理コストを低減でき、し力、も処理設備全 体の熱利用率を高めて処理コストを低くできる。 [0021] Using nitrogen as the inert gas, heating the nitrogen and feeding it to the activated carbon adsorbing device to desorb organic matter, and supplying the desorbed organic matter to the cooling device, It is preferable to introduce nitrogen by heating! [0022] According to this configuration, it is possible to reduce the processing cost by using inexpensive nitrogen, and it is possible to increase the heat utilization rate of the entire processing equipment and reduce the processing cost.
図面の簡単な説明  Brief Description of Drawings
[0023] [図 1]本発明の一実施形態に係る有機物含有ガス処理設備の概略全体フロー図 符号の説明  FIG. 1 is a schematic overall flow diagram of an organic substance-containing gas processing facility according to an embodiment of the present invention.
[0024] 2 除湿機構 [0024] 2 Dehumidification mechanism
2a プレクーラー  2a precooler
2b 除湿装置  2b Dehumidifier
4 活性炭吸着装置  4 Activated carbon adsorption device
6, 7, 12 加熱ガス送給装置  6, 7, 12 Heated gas feeder
13, 14 冷却装置  13, 14 Cooling device
15 回収装置  15 Collection device
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0025] 本発明の実施形態を、図面を参照して詳細に説明する。図 1は、本実施形態に係 る有機物含有ガス処理設備の概略全体構成を示す。  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic overall configuration of an organic substance-containing gas processing facility according to this embodiment.
[0026] この有機物含有ガス処理設備の概略構造を、図 1に示す。すなわち、各種化学ェ 場など力 発生した被処理ガス（有機物含有ガス）は、送給ファン 1により、除湿機構 2を構成する、プレクーラー 2aとこれに続く除湿装置 2bに送給されると共に、除湿機 構 2により水分が除湿された被処理ガスは、有機物を吸着除去する活性炭吸着装置 4に送られる。更に、この有機物含有ガス処理設備は、活性炭吸着装置 4によって吸 着された有機物を活性炭から脱離するため加熱された不活性ガスを送給する装置 5 と、この加熱された不活性ガスにより脱離された有機物を零度以下に冷却して脱水す る冷却装置 6と、脱水された有機物を回収する回収装置 7などとを有して構成されて いる。  [0026] FIG. 1 shows a schematic structure of the organic substance-containing gas treatment facility. That is, the gas to be processed (organic substance-containing gas) generated by various chemical fields and the like is fed by the feed fan 1 to the precooler 2a and the subsequent dehumidifier 2b constituting the dehumidifying mechanism 2. The gas to be treated whose moisture has been dehumidified by the dehumidifying mechanism 2 is sent to an activated carbon adsorption device 4 that adsorbs and removes organic substances. Further, this organic matter-containing gas treatment facility is equipped with a device 5 for supplying heated inert gas to desorb the organic matter adsorbed by the activated carbon adsorbing device 4 from the activated carbon, and a degassing by the heated inert gas. The apparatus includes a cooling device 6 that cools the separated organic matter to below zero degree and dehydrates it, a recovery device 7 that collects the dehydrated organic matter, and the like.
[0027] プレクーラー 2aは、熱交換器から構成されていて、ブラインチラー 10から冷媒を送 給される。この熱交換器には、ブライン貯槽タンク Tから送られた冷媒 (ブライン)を冷 却するブラインチラー 10から、ポンプ P1により、配管 11を通して冷媒が送給 ·循環さ れるようになっている。 [0028] プレクーラー 2aに続く除湿装置 2bは、例えば、円筒状容器内に回転可能に、ハニ カム状に配置されたモレキュラーシーブスあるいはゼォライト等が収容されたロータ 一（ノ、二カムローター）を構成していて、これが徐回転 (例えば、約 10回転/時間程 度）する中を被処理ガスが通過することにより、被処理ガス中の水分が除去されつつ 、シールされ区画された別経路に対して反対方向から、再生ファン（図示略)より温風 (110〜150°C程度）が吹き込まれて再生される方式などを採用することができる。こ の除湿装置 2bにより、被処理ガスを安定した低い露点（例えば、 30°C以下）にす ること力 Sでさる。 [0027] The precooler 2a is constituted by a heat exchanger, and the refrigerant is supplied from the blownler 10. In this heat exchanger, the refrigerant is fed and circulated through the pipe 11 by the pump P1 from the blower 10 that cools the refrigerant (brine) sent from the brine storage tank T. [0028] The dehumidifying device 2b following the precooler 2a includes, for example, a rotor (no, two-cam rotor) in which molecular sieves or zeolites arranged in a honeycomb shape are rotatably accommodated in a cylindrical container. The gas to be treated passes through the slow rotation (for example, about 10 revolutions / hour), so that the moisture in the gas to be treated is removed while the gas is removed in a sealed and separated path. On the other hand, it is possible to adopt a method in which warm air (about 110 to 150 ° C.) is blown from a regeneration fan (not shown) and reproduced from the opposite direction. With this dehumidifier 2b, the power S can be adjusted to bring the gas to be treated to a stable low dew point (eg, 30 ° C or less).
[0029] なお、被処理ガス中の塵芥などを除去するため、被処理ガスを除湿機構 2に導入 する前に、予め市販の各種除塵フィルターなどからなるプレフィルターを配置してレヽ てもよい。  [0029] In order to remove dust and the like in the gas to be treated, before introducing the gas to be treated into the dehumidifying mechanism 2, a prefilter made of various types of commercially available dust removing filters or the like may be disposed in advance.
[0030] 除湿機構 2を経た被処理ガスは、制御バルブ 3を介して複数の活性炭吸着装置 4 に送給される。この活性炭吸着装置 4は、図 1では 2台並列されており、このようにす ると、 1台を吸着用に使用し、他方を脱着 ·再生用として使用することができる。もとよ り、活性炭吸着装置 2は 1台でもよぐ更に多数台配置してもよぐその台数、仕様な どは被処理ガスの量や、特性により適宜選択される。  The gas to be treated that has passed through the dehumidifying mechanism 2 is sent to a plurality of activated carbon adsorption devices 4 through a control valve 3. In FIG. 1, two activated carbon adsorption devices 4 are arranged in parallel, and in this way, one can be used for adsorption and the other can be used for desorption / regeneration. Of course, the number of activated carbon adsorption devices 2 may be one or more, and the number, specifications, etc., may be selected appropriately depending on the amount of gas to be treated and the characteristics.
[0031] 活性炭吸着装置 4には、ハニカム状活性炭が充填 ·装着されていて、従来技術のよ うに、粒状活性炭や繊維状活性炭を使用しないため、活性炭吸着装置 4は、通気抵 抗が小さくて圧力損失が小さぐそれでいて吸着能が高いことが特徴である。ハニカ ム状活性炭の圧力損失が小さいことから、送給ファン 1の動力源は小さくてよぐ消費 エネルギーは少なくて済む。この活性炭吸着装置 4は種々の構成が考えられるが、 例えば、多孔板と流体ジャケットとを有するユニットに、ハニカム状活性炭を約 90〜4 50mm程度積層して構成されて!/、る。  [0031] The activated carbon adsorbing device 4 is filled and fitted with honeycomb-like activated carbon and does not use granular activated carbon or fibrous activated carbon as in the prior art. Therefore, the activated carbon adsorbing device 4 has a small ventilation resistance. It is characterized by low pressure loss and high adsorption capacity. Since the pressure loss of the honeycomb-like activated carbon is small, the power source of the feeding fan 1 can be small and consumes less energy. The activated carbon adsorbing device 4 may have various configurations. For example, the activated carbon adsorbing device 4 is configured by stacking about 90 to 450 mm of honeycomb-shaped activated carbon on a unit having a perforated plate and a fluid jacket.
[0032] ハニカム状活性炭の比表面積は、約 200〜3000m2/g程度のものを使用すること が好ましぐ約 300〜2500m2/g程度のものを使用することがより好ましぐ約 400〜 2000m2/g程度のものを使用することがより一層好ましい。 [0032] honeycomb specific surface area of activated carbon, about 200~3000m 2 / it is preferable to g using of about instrument about 300~2500m 2 / g approximately and more preferably tool 400 to use a It is even more preferable to use a material of about ~ 2000 m 2 / g.
[0033] ハニカム状活性炭の透孔は、六角形に限定されるものではなぐ正方形、長方形、 多角形、円形、略円形など種々の形状のものを採用できる。透孔の数 (セル数）は多 いほど被処理数との接触が多く吸着能が高くなつて好ましいが、透孔数が多過ぎると 、圧力損失も大きくなり、製造上も困難となってコストは高くなる。そこで、透孔数は約 15〜2326個/ 10cm2程度力 S好ましく、約 30〜； 1550個/ 10cm2程度がより好ましく 、約 39〜； 1162個/ 10cm2程度がより一層好ましい。 [0033] The through-holes of the honeycomb-like activated carbon are not limited to hexagonal shapes, and may be various shapes such as square, rectangle, polygon, circle, and substantially circle. There are many through holes (cells) It is preferable that the amount of contact with the number of treatments is large and the adsorptive capacity is high. However, when the number of pores is too large, the pressure loss increases and the manufacturing becomes difficult and the cost increases. Accordingly, the number of the through holes is about 15 to 2326/10 cm 2 force S, preferably about 30 to about 1550/10 cm 2 , more preferably about 39 to about 1162/10 cm 2 .
[0034] ハニカム状活性炭の製造方法は、特に限定されないが、通常、活性炭原料にバイ ンダーを加えてハニカム状に成型し、炭化'賦活化した後、必要に応じて酸洗浄され る力、、あるいは、活性炭自体をハニカム状に成型した後、乾燥され焼成されて製造さ れる。 [0034] The method for producing the honeycomb-shaped activated carbon is not particularly limited. Usually, the activated carbon raw material is added with a binder, formed into a honeycomb shape, activated by carbonization, and then washed with an acid if necessary. Alternatively, the activated carbon itself is formed into a honeycomb and then dried and fired.
[0035] 活性炭吸着装置 4に有機物が吸着'除去された処理排ガスは、その後、制御バル ブ 5を経て大気中に放出される力 S、処理排ガス中に残留する有機物が排出基準値以 下でない場合、更に無害化処理を施されて放出されることになる。  [0035] The treated exhaust gas from which the organic matter has been adsorbed and removed by the activated carbon adsorbing device 4 is then released into the atmosphere via the control valve 5, and the organic matter remaining in the treated exhaust gas is not less than the emission standard value. In this case, it is discharged after further detoxification treatment.
[0036] また、活性炭吸着装置 4の下流側には、ハニカム状活性炭に吸着した有機物を脱 離し、回収する装置が設けられている。この場合、ハニカム状活性炭に通流させる被 処理ガスの線流速 (LVa)と、有機物を吸着したハニカム状活性炭から有機物を脱離 するときのガスの線速度（LVb)との関係は重要であり、 LVb/LVa = 0〜l/10, 0 00であることを要すると共に、より好ましく LVb/LVa= l/10〜； 1/10, 000である 。この範囲であると、ハニカム状活性炭に吸着した有機物を効率的に脱離することが できる。具体的には、ハニカム状活性炭に有機物を含有する被処理ガスを線速度 30 〜300cm/秒で通流させ、この線速度の 1/10〜； 1/10, 000で脱離用窒素を通 流させることが、効率的に有機物を脱離させることができる。  [0036] Further, on the downstream side of the activated carbon adsorption device 4, a device for separating and collecting the organic matter adsorbed on the honeycomb-like activated carbon is provided. In this case, the relationship between the linear flow velocity (LVa) of the gas to be treated that flows through the honeycomb-shaped activated carbon and the linear velocity (LVb) of the gas when the organic matter is desorbed from the honeycomb-like activated carbon that has adsorbed the organic matter is important. LVb / LVa = 0 to l / 10, 00 and more preferably LVb / LVa = l / 10 to 1 / 10,000. Within this range, organic substances adsorbed on the honeycomb-like activated carbon can be efficiently desorbed. Specifically, a treatment gas containing an organic substance is passed through honeycomb activated carbon at a linear velocity of 30 to 300 cm / second, and desorption nitrogen is passed at 1/10 to 1 / 10,000 of this linear velocity. By making it flow, organic substances can be efficiently desorbed.
[0037] 有機物を吸着したハニカム状活性炭からの有機物脱離は、従来、 130°C程度に加 熱した 1. 9気圧程度の加圧水蒸気を送給して行い、脱離後熱風乾燥するようにして いたが、このようにすると、有機物が特に低沸点のベンゼン、トルエン、キシレン（いわ ゆる BTX)である場合、乾燥用に送給される熱風との間で爆発限界に達することがあ り、そのため細心の注意を要する等、作業し難ぐ防爆設備その他の設備を設ける必 要があるという問題があった。そこで、力、かる問題を確実に解消するため、本実施形 態では、不活性ガスである窒素を 90〜110°C程度、好ましくは約 100°C程度に加熱 して送給するようにしている。もとより、窒素に代えて他の不活性ガスを使用してもよい 〇 [0037] The organic substance detachment from the honeycomb activated carbon adsorbing the organic substance is conventionally performed by supplying pressurized steam of about 1.9 atmospheres heated to about 130 ° C, and dried with hot air after the detachment. However, in this way, if the organic substance is benzene, toluene or xylene (so-called BTX) with a particularly low boiling point, the explosion limit may be reached with the hot air sent for drying. For this reason, there was a problem that it was necessary to install explosion-proof equipment and other equipment that would be difficult to work with, such as careful attention. Therefore, in order to reliably solve the problem of force, in this embodiment, nitrogen, which is an inert gas, is heated to about 90 to 110 ° C, preferably about 100 ° C, and is sent. Yes. Of course, other inert gas may be used instead of nitrogen. Yes
[0038] すなわち、窒素は、窒素容器 (気体入りボンべあるいは液体窒素容器など） 12から 制御バルブを介して窒素ガス循環ファン 6により、熱媒油槽 7に送給され熱交換され て、ハニカム状活性炭に吸着している有機物の沸点より幾分高い温度にまで加熱さ れ、配管 20を通流し制御バルブ 8を介して活性炭吸着装置 4に送給される。熱媒油 槽 7の熱量は、ヒーター 24を取り付けること等により直接あるいは間接に加熱すること により得られる。熱媒油槽 7の熱媒体は、ポンプ P2により循環され、所定温度に維持 されるようになつている。もっとも、熱媒油槽 7の熱量は、工場内の他の熱源から発生 した熱を供給して利用してもよい。窒素を送給するのに、必ずしも窒素ガス循環ファ ン 6を用いなくてもよぐ他の送給手段を用いてもよい。ここに、窒素容器 12、窒素ガ ス循環ポンプ 6、熱媒油槽 7などは加熱ガス送給装置を構成する。  [0038] That is, nitrogen is fed from a nitrogen container (such as a gas cylinder or a liquid nitrogen container) 12 through a control valve to a heat transfer oil tank 7 by a nitrogen gas circulation fan 6, and heat is exchanged to form a honeycomb. Heated to a temperature slightly higher than the boiling point of the organic matter adsorbed on the activated carbon, flows through the pipe 20 and is sent to the activated carbon adsorption device 4 via the control valve 8. The amount of heat in the heat transfer oil tank 7 can be obtained by heating directly or indirectly by attaching a heater 24 or the like. The heat medium in the heat medium oil tank 7 is circulated by the pump P2 and maintained at a predetermined temperature. However, the heat quantity in the heat transfer oil tank 7 may be supplied by using heat generated from other heat sources in the factory. It is not necessary to use the nitrogen gas circulation fan 6 to feed nitrogen, but other feeding means may be used. Here, the nitrogen container 12, the nitrogen gas circulation pump 6, the heat transfer oil tank 7, and the like constitute a heated gas feeding device.
[0039] 活性炭吸着装置 4のハニカム状活性炭に吸着された有機物は、加熱窒素により脱 離されて、窒素と共に脱着窒素制御バルブ 9を経て、第 1冷却器 13に送給され幾分 冷却される。第 1冷却器 13へは、第 1チラ一ユニット 16から冷媒が熱交用冷却水循 環ポンプ P3により送給 '循環されるようになっている。図番 17は、第 1チラ一ユニット 1 6に送る冷却水を貯槽する、供給ポンプ P4を備えた冷却水槽である。  [0039] The organic matter adsorbed on the honeycomb activated carbon of the activated carbon adsorbing device 4 is desorbed by heated nitrogen, and is fed together with nitrogen through the desorption nitrogen control valve 9 to the first cooler 13 to be cooled somewhat. . The refrigerant is supplied and circulated from the first chiller unit 16 to the first cooler 13 by the heat exchanger cooling water circulation pump P3. Figure 17 is a cooling water tank equipped with a supply pump P4 for storing cooling water to be sent to the first chiller unit 16.
[0040] なお、ハニカム状活性炭から加熱窒素で脱離した有機物を第 1冷却器 13に送給す る経路に、窒素容器 12から窒素の一部を加熱することなぐ配管 21を通して導入す ることが好ましい。このようにすると、第 1冷却器 13における熱消費量が少なくて済み 、設備全体の熱利用率が高まり、省エネルギーとなる。図番 22は、導入する冷却用 窒素の量を制御する冷却バルブである。  [0040] It should be noted that the organic substance desorbed from the honeycomb-shaped activated carbon with heated nitrogen is introduced into the first cooler 13 through a pipe 21 that does not heat a part of nitrogen from the nitrogen container 12. Is preferred. In this way, the heat consumption in the first cooler 13 can be reduced, and the heat utilization rate of the entire equipment is increased, resulting in energy saving. Figure 22 shows a cooling valve that controls the amount of cooling nitrogen introduced.
[0041] 更に、有機物を含む窒素は、第 2冷却器 14の内部に多数配置されている細管内に 送給されて冷却され、有機物は液状にされる。その場合、第 2冷却器 14では、有機 物を含む窒素を零度以下、好ましくは 10°C以下に冷却するので、窒素中の水分 は、細管表面に凍結されて分離'除去される。第 2冷却器 14は、図 1では 2台並列に 配置されて水分除去の効率を高くしている力 1台でもよく、更に増設してもよい。  [0041] Further, nitrogen containing organic matter is fed into a plurality of narrow tubes arranged inside the second cooler 14 to be cooled, and the organic matter is liquefied. In that case, the second cooler 14 cools the nitrogen containing the organic matter to below zero degree, preferably below 10 ° C., so that the water in the nitrogen is frozen on the surface of the capillary tube and separated and removed. In FIG. 1, two second coolers 14 may be arranged in parallel to increase the efficiency of moisture removal, or may be further increased.
[0042] また、有機物と水分を除去された窒素は、窒素を加熱する熱媒油槽 7に送給されて 再利用すること力できる。図番 23は、窒素の送給量を制御する制御バルブである。 [0043] 液状の有機物は、更にデカンター等の回収槽 15に送られて、高い純度の有機物と して回収される。このようにすることにより、高純度の有機物中の溶存水分は、 0. 5重 量％以下程度にできる。従って、有機物が酢酸ェチルである場合には、それを特に グラビア印刷インクの溶剤として用いたとしても、インクの滲みが生じるのを確実に抑 制できる。第 1 ,第 2冷却器 13, 14は冷却装置を構成し、デカンター 15は回収装置 を構成する。もっとも、被処理ガス中の有機物によっては、必ずしもデカンター 15で ある必要はなぐ他の回収手段を使用してもよい。 [0042] Further, nitrogen from which organic substances and moisture have been removed can be sent to the heat transfer oil tank 7 for heating the nitrogen and reused. Figure 23 is a control valve that controls the nitrogen supply. [0043] The liquid organic matter is further sent to a collection tank 15 such as a decanter and collected as a high-purity organic matter. By doing so, the dissolved water in the high-purity organic substance can be reduced to about 0.5% by weight or less. Therefore, when the organic substance is ethyl acetate, even if it is used as a solvent for gravure printing ink, it is possible to reliably prevent ink bleeding. The first and second coolers 13 and 14 constitute a cooling device, and the decanter 15 constitutes a recovery device. However, depending on the organic matter in the gas to be treated, other recovery means that do not necessarily need to be the decanter 15 may be used.
[0044] 第 2冷却器 14へは、第 2チラ一ユニット 18から冷媒が熱交換器 19を介して送給さ れ、ブライン循環ポンプ P5により循環されるようになっている。  [0044] To the second cooler 14, the refrigerant is fed from the second chiller unit 18 via the heat exchanger 19, and is circulated by the brine circulation pump P5.
実施例  Example
[0045] 被処理ガスである有機物含有ガスとして、酢酸ェチルを含有する排ガスを処理した 例について説明する。大気中の相対湿度は約 60%であり、酢酸ェチル（約 2000重 量 ppm)を含有する排ガス流量（約 300Nm3 /h)を、図 1に示すように、プレクーラ 一で 5°C以下に冷却し、次いで除湿装置であるハニカムローターで露点 30°C以下 にした後、ハニカム状活性炭を内蔵した活性炭吸着装置 4に送給して吸着させた。 活性炭吸着装置 4は、ハニカム状活性炭約 20, 000枚を含み、寸法 3, 000 X 4, 50 0 X高さ 1 , 000mmのものを用いた。酢酸ェチルを吸着したハニカム状活性炭に対 して、約 100°Cに加熱した窒素を通流させて酢酸ェチルを脱離させ、有機物を含む 窒素を、約 15°C以下に冷却した第 1冷却器 13、次いで約— 10°Cに冷却した第 2冷 却器 14を通流させた。最終的にデカンターから回収された液状酢酸ェチルは、約 1 37kg/hであり（回収率約 97%)、この酢酸ェチル中に含まれる溶存水分は、 0. 35 重量％であった。 [0045] An example in which an exhaust gas containing ethyl acetate is treated as an organic substance-containing gas that is a gas to be treated will be described. The relative humidity in the atmosphere is approximately 60%, and the exhaust gas flow rate (approximately 300 Nm 3 / h) containing ethyl acetate (approximately 2000 ppm by weight) is reduced to 5 ° C or less with a precooler as shown in Fig. 1. After cooling, the dew point was lowered to 30 ° C. or less with a honeycomb rotor as a dehumidifying device, and the dew point was fed to the activated carbon adsorbing device 4 incorporating the honeycomb-like activated carbon for adsorption. The activated carbon adsorbing device 4 includes about 20,000 honeycomb activated carbons and has a size of 3,000 × 4,500 × height of 1,000 mm. First cooling of the activated carbon adsorbed with ethyl acetate by passing nitrogen heated to about 100 ° C to desorb the ethyl acetate and cooling the nitrogen containing organic matter to about 15 ° C or less. And then a second cooler 14 cooled to about -10 ° C. The liquid ethyl acetate finally recovered from the decanter was about 137 kg / h (recovery rate about 97%), and the dissolved water contained in this ethyl acetate was 0.35% by weight.
〔別実施の形態〕  [Another embodiment]
(1)上記実施形態では、有機物として酢酸ェチルを有する被処理ガスを処理する例 を示した力 これに限定されるものではなぐ回収有機物中の水分を低減したい場合 に、本発明は広く適用することができる。  (1) In the above-described embodiment, force showing an example of processing a gas to be processed having ethyl acetate as an organic substance. The present invention is widely applied when it is desired to reduce moisture in recovered organic substance, which is not limited to this. be able to.
産業上の利用可能性  Industrial applicability
[0046] 本発明は、各種化学工業、食品工業、製紙工業、薬品工業などから排出される、有 機物を含むガスを処理する場合に、広く適用することができる。 [0046] The present invention can be discharged from various chemical industries, food industries, paper industries, pharmaceutical industries, etc. The present invention can be widely applied when processing gas containing equipment.

Claims

請求の範囲 The scope of the claims
[1] 有機物を含有する被処理ガス中に含まれる水分を除去する除湿機構と、除湿された 被処理ガス中の有機物を吸着除去するためのハニカム状活性炭が充填 ·装着されて 活性炭吸着装置と、この活性炭吸着装置によって吸着された有機物を活性炭から脱 離するため加熱された不活性ガスを送給する加熱ガス供給装置と、この加熱された 不活性ガスにより脱離された有機物を零度以下に凍結して脱水する冷却装置と、脱 水された有機物を回収する回収装置と、を有する有機物含有ガス処理設備。  [1] A dehumidification mechanism that removes moisture contained in the gas to be treated containing organic matter, and a honeycomb activated carbon for adsorbing and removing the organic matter in the dehumidified gas to be treated is installed and attached to the activated carbon adsorption device. A heated gas supply device for supplying a heated inert gas to desorb the organic matter adsorbed by the activated carbon adsorption device from the activated carbon, and the organic matter desorbed by the heated inert gas to below zero degree. An organic matter-containing gas processing facility comprising a cooling device that freezes and dehydrates, and a recovery device that recovers the dehydrated organic matter.
[2] 前記除湿機構が、冷媒の送給を受ける熱交換器力 構成されたプレクーラーと、これ に続く除湿装置とを有しており、この除湿装置が円筒状容器内に回転可能に、モレ キュラーシーブスあるいはゼォライトがハニカム状に配置されたハニカムローターから 構成されている請求項 1の有機物含有ガス処理設備。  [2] The dehumidifying mechanism has a precooler configured with a heat exchanger that receives supply of the refrigerant, and a dehumidifying device that follows the precooler, and the dehumidifying device is rotatable in the cylindrical container. 2. The organic substance-containing gas treatment facility according to claim 1, comprising a honeycomb rotor in which molecular sieves or zeolite are arranged in a honeycomb shape.
[3] 前記不活性ガスが窒素であり、この窒素を加熱して前記活性炭吸着装置に送給して 有機物を脱離するようになっていると共に、脱離された有機物を前記冷却装置に送 給する経路に、加熱してレ、な!/、窒素を導入するようになって!/、る請求項 1又は 2の有 機物含有ガス処理設備。  [3] The inert gas is nitrogen, and the nitrogen is heated and sent to the activated carbon adsorption device to desorb organic matter, and the desorbed organic matter is sent to the cooling device. The organic-containing gas treatment facility according to claim 1 or 2, wherein the heating route is heated to introduce nitrogen! /, Nitrogen! /.
[4] 有機物を含有する被処理ガス中に含まれる水分を除湿機構により除去し、除湿され た被処理ガス中の有機物をハニカム状活性炭が充填'装着されて活性炭吸着装置 に導入して吸着除去し、この活性炭吸着装置によって吸着された有機物を活性炭か ら脱離するため加熱した不活性ガスを送給し、この加熱された不活性ガスにより脱離 された有機物を冷却装置により零度以下に凍結して脱水し、脱水された有機物を回 収する有機物含有ガス処理方法。  [4] Moisture contained in the gas to be treated containing organic substances is removed by a dehumidifying mechanism, and the organic substance in the dehumidified gas to be treated is filled with honeycomb activated carbon and introduced into the activated carbon adsorption device for adsorption removal. In order to desorb the organic matter adsorbed by the activated carbon adsorption device from the activated carbon, a heated inert gas is supplied, and the organic matter desorbed by the heated inert gas is frozen to below zero degree by the cooling device. An organic matter-containing gas treatment method that dehydrates and collects the dehydrated organic matter.
[5] 前記除湿機構による被処理ガス中の水分除去を、冷媒の送給を受ける熱交換器力 構成されたプレクーラーと、これに続く除湿装置に前記被処理ガスを通して行い、前 記除湿装置が円筒状容器内に回転可能に、モレキュラーシーブスあるいはゼォライ トがハ二カム状に配置されたハニカムローターから構成されている請求項 4の有機物 含有ガス処理方法。  [5] Moisture removal in the gas to be treated by the dehumidifying mechanism is performed by passing the gas to be treated through a precooler configured with a heat exchanger that receives supply of refrigerant and a dehumidifying device following the precooler, 5. The organic substance-containing gas treatment method according to claim 4, wherein the organic substance-containing gas treatment method comprises a honeycomb rotor in which molecular sieves or zeolite are arranged in a cylindrical shape so as to be rotatable in a cylindrical container.
[6] 前記不活性ガスとして窒素を用い、この窒素を加熱して前記活性炭吸着装置に送給 して有機物を脱離すると共に、脱離された有機物を前記冷却装置に送給する経路に 、加熱して!/、な!/、窒素を導入する請求項 4又は 5の有機物含有ガス処理方法。 [6] Using nitrogen as the inert gas, this nitrogen is heated and sent to the activated carbon adsorption device to desorb organic matter, and the desorbed organic matter is routed to the cooling device. 6. The method for treating an organic substance-containing gas according to claim 4 or 5, wherein heating is performed! /, Na! /, And nitrogen is introduced.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109045932A (en) * 2018-09-20 2018-12-21 岭商（浙江）生物科技有限公司 A kind of exhaust treatment system and its treatment process of fish meal

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102350204B (en) * 2011-10-17 2013-07-10 沈阳环境科学研究院 Modular absorbing and purifying device for volatile organic waste gases
CN103521027A (en) * 2013-09-25 2014-01-22 江苏中远环保科技有限公司 Oxygen-removed oil gas recovery method and device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6182825A (en) * 1984-09-29 1986-04-26 Daikin Ind Ltd Solvent recovery apparatus
JPH0290921A (en) * 1988-09-26 1990-03-30 Kobe Steel Ltd Concentrator for fluorocarbon-containing gas
JPH0342013A (en) * 1989-07-06 1991-02-22 Kobe Steel Ltd Solvent recovery appratus
JPH0515725A (en) * 1991-07-09 1993-01-26 Kobe Steel Ltd Apparatus for concentrating and recovering solvent
JPH09141053A (en) * 1995-05-10 1997-06-03 Mitsubishi Heavy Ind Ltd Recovering method of organic volatile material
JP2006088102A (en) * 2004-09-27 2006-04-06 Kenji Nakajima Treating apparatus and treating method of organic substance-containing gas

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6182825A (en) * 1984-09-29 1986-04-26 Daikin Ind Ltd Solvent recovery apparatus
JPH0290921A (en) * 1988-09-26 1990-03-30 Kobe Steel Ltd Concentrator for fluorocarbon-containing gas
JPH0342013A (en) * 1989-07-06 1991-02-22 Kobe Steel Ltd Solvent recovery appratus
JPH0515725A (en) * 1991-07-09 1993-01-26 Kobe Steel Ltd Apparatus for concentrating and recovering solvent
JPH09141053A (en) * 1995-05-10 1997-06-03 Mitsubishi Heavy Ind Ltd Recovering method of organic volatile material
JP2006088102A (en) * 2004-09-27 2006-04-06 Kenji Nakajima Treating apparatus and treating method of organic substance-containing gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109045932A (en) * 2018-09-20 2018-12-21 岭商（浙江）生物科技有限公司 A kind of exhaust treatment system and its treatment process of fish meal

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