WO2013143044A1 - 挥发性有机物处理方法及装置 - Google Patents

挥发性有机物处理方法及装置 Download PDF

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Publication number
WO2013143044A1
WO2013143044A1 PCT/CN2012/001485 CN2012001485W WO2013143044A1 WO 2013143044 A1 WO2013143044 A1 WO 2013143044A1 CN 2012001485 W CN2012001485 W CN 2012001485W WO 2013143044 A1 WO2013143044 A1 WO 2013143044A1
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WIPO (PCT)
Prior art keywords
dew point
point temperature
exhaust gas
volatile organic
humidifier
Prior art date
Application number
PCT/CN2012/001485
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English (en)
French (fr)
Inventor
林易成
Original Assignee
承源环境科技企业有限公司
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Application filed by 承源环境科技企业有限公司 filed Critical 承源环境科技企业有限公司
Priority to JP2015502034A priority Critical patent/JP6273254B2/ja
Priority to SG11201405629PA priority patent/SG11201405629PA/en
Priority to US14/379,386 priority patent/US9504935B2/en
Priority to KR1020147026784A priority patent/KR101982374B1/ko
Publication of WO2013143044A1 publication Critical patent/WO2013143044A1/zh
Priority to IN1744KON2014 priority patent/IN2014KN01744A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0051—Regulation processes; Control systems, e.g. valves
    • 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
    • B01D53/002—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 by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0027—Condensation of vapours; Recovering volatile solvents by condensation by direct contact between vapours or gases and the cooling medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
    • B01D5/0087—Recirculating of the cooling medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
    • B01D5/009—Collecting, removing and/or treatment of the condensate
    • 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
    • B01D53/346—Controlling the process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/103—Water
    • 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
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0486—Operating the coating or treatment in a controlled atmosphere

Definitions

  • the invention relates to a method and a device for treating volatile organic compounds, in particular to spraying water mist to increase the humidity of the exhaust gas to be treated, and dehumidifying the exhaust gas after humidification by condensation, so that the humidity ratio of the exhaust gas before and after treatment is maintained. Almost unchanged design.
  • VOCs Volati le Organic Compounds
  • a condensing device for separating water-soluble volatile organic compounds from the exhaust gas.
  • a condenser 11 is disposed inside an exhaust gas flow passage 10 to allow the exhaust gas passing through the condenser 11. The temperature is lowered to below the dew point temperature, and the water-soluble volatile organic substance contained in the exhaust gas is condensed and separated by the condensation of the volatile organic substance itself and the adsorption of the condensed water drop; then, a downstream end of the condenser 11 is disposed.
  • the mist eliminator 12 or the second condenser allows the smaller-volume volatile organic compounds and moisture to grow and capture or separate or condense; or, by the condenser 11 or The secondary condensation is condensed and separated and the droplets separated by the mist eliminator 12 are dropped to the sump 13 disposed under the condenser 11 and the demister 12; however, due to dripping to the condensation
  • the droplets contained in the liquid collection tank 13 do not contain a high concentration of volatile organic compounds, and it is difficult to recycle and reuse volatile organic compounds, and a large amount of volatile organic matter is generated. Waste water, waste water produced by a large number must be processed further.
  • the main technical problem to be solved by the present invention is to overcome the problem of generating a large amount of waste water existing in the prior art, and to provide a method and a device for treating volatile organic compounds, which have almost no waste water and have improved recovery of volatile organic matters.
  • the concentration also has the effect of washing the suspended particles with the effect of reuse.
  • the technical solution adopted by the present invention to solve the technical problem thereof is:
  • a volatile organic matter treatment method for treating a waste gas stream containing volatile organic compounds, and simultaneously washing the suspended particles including: a dew point temperature sensing step, sensing the dew point temperature of the atmosphere as a reference temperature; a humidifying and condensing In the first step, spraying the water mist causes the exhaust gas stream to increase humidity and condense to generate a condensate containing volatile organic compounds; a condensation dew point temperature sensing step, sensing the temperature of the airflow after the condensation treatment; a droplet collection step, collecting humidification And condensing the droplets dripped by the pulverization, and collecting the collected droplets for circulating spraying to humidify and condense; and controlling the turbulent, controlling the temperature of the condensed airflow to be close to the reference temperature.
  • the humidifying and condensing step is to spray the low-temperature water mist to simultaneously humidify and condense, or the humidifying and condensing step is to spray the normal temperature water mist and first condense after humidification. Further, a pre-cooling step is further added before the humidification and condensation steps.
  • the first embodiment of the volatile organic matter processing apparatus of the present invention is for treating a waste gas stream containing volatile organic compounds, and includes: a dew point temperature sensor disposed outside an exhaust gas flow passage for sensing the atmosphere a dew point temperature; a humidifier disposed inside the exhaust gas flow passage for spraying a mist on the passing exhaust gas stream to increase humidity, and for washing the suspended particles; a condenser disposed inside the exhaust gas flow passage and located a downstream end of the humidifier for condensing the humidified exhaust gas stream to produce a condensate containing volatile organic compounds; a sump disposed inside the exhaust gas flow passage and located at the humidifier and the condenser a lower portion for receiving droplets dripping from the humidifier and the condenser, and conveying the collected droplets to the humidifier for cyclic spraying; a condensed dew point temperature sensor disposed at the exhaust gas stream Inside the channel for sensing the temperature of the airflow after condensation treatment; and a controller connecting the dew point temperature sensor, the
  • a second embodiment of the volatile organic matter processing apparatus of the present invention is for treating an exhaust gas stream containing volatile organic compounds, and includes: a dew point temperature sensor disposed outside an exhaust gas flow channel for sensing the atmosphere a dew point temperature; a low temperature humidifier disposed inside the exhaust gas flow passage for spraying a mist of the exhaust gas stream to increase humidity, and cooling and condensing to produce a condensate containing volatile organic compounds, and may be used to wash the suspended particles a collecting tank disposed inside the exhaust gas flow passage and below the low temperature humidifier for receiving droplets dripped from the low temperature humidifier, and cooling the collected droplets by a cooler Delivered to this low a humidifier and circulating spray; a condensed dew point temperature sensor disposed inside the exhaust gas flow passage for sensing the temperature of the condensed air stream; and a controller coupled to the dew point temperature sensor, the cooler and The condensed dew point temperature sensor, wherein the dew point temperature sensed by the dew point temperature sensor is used as
  • a pre-cooler is further provided, and the pre-cooler is disposed inside the exhaust gas flow passage and at the upstream end of the humidifier or the low-temperature humidifier.
  • the beneficial effects of the present invention are that it has almost no waste water generation and has an effect of increasing the recovery concentration of volatile organic compounds for reuse, and also has the effect of washing suspended particles.
  • FIG. 1 is a schematic view showing the structure of a conventional volatile organic matter processing apparatus.
  • Figure 2 is a schematic view showing the structure of the first embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of a second embodiment of the present invention.
  • Figure 4 is a graphical representation of the variation of the humidity properties of the process of the present invention in a moisture profile.
  • a first embodiment of the volatile organic matter processing apparatus of the present invention includes:
  • a dew point temperature sensor 21 is disposed outside an exhaust gas flow passage 20 for sensing the dew point temperature of the atmosphere, and may be a wet bulb thermometer or a combination of a dry bulb thermometer and a relative humidity meter;
  • a humidifier 22 is disposed inside the exhaust gas flow passage 20 for spraying the mist of the passing exhaust gas to increase the humidity, and can also be used for washing the suspended particles;
  • a condenser 23 disposed inside the exhaust gas flow passage 20 and located at a downstream end of the humidifier 22 for condensing the humidified exhaust gas stream to produce a condensate containing volatile organic compounds
  • An sump 24 is disposed inside the exhaust gas flow passage 20 and below the humidifier 22 and the condenser 23 for receiving droplets dripping from the humidifier 22 and the condenser 23, And collecting the collected droplets to the humidifier 22 for circulating spraying;
  • a condensed dew point temperature sensor 25 is disposed inside the exhaust gas flow passage 20 for sensing the temperature of the airflow after condensation treatment by the condenser 23, and may be a wet bulb thermometer or a combination of a dry bulb thermometer and a relative humidity meter ;
  • a controller 26 is coupled to the dew point temperature sensor 22, the condenser 23 and the condensed dew point temperature sensor 25, and the dew point temperature sensed by the dew point temperature sensor 22 is used as a reference temperature, and the condensation dew point is The post-condensation dew point temperature sensed by the temperature sensor 25 is fed back to the controller 26, which in turn controls the degree of condensation through the condenser 23 to control the condensation of the gas stream dew point temperature through the condenser 23 to near the reference temperature.
  • a second embodiment of the volatile organic matter processing apparatus of the present invention includes:
  • a dew point temperature sensor 21 is disposed outside an exhaust gas flow passage 20 for sensing the dew point temperature of the atmosphere, and may be a wet bulb thermometer or a combination of a dry bulb thermometer and a relative humidity meter;
  • a low temperature humidifier 28 is disposed inside the exhaust gas flow passage 20 for spraying the mist of the passing exhaust gas to increase the humidity, and cooling and condensing to generate a condensate containing volatile organic substances, and can also be used for washing the suspended particles;
  • An sump 24a is disposed inside the exhaust gas flow passage 20 and below the low temperature humidifier 28 for receiving droplets dripped from the low temperature humidifier 28 and cooling the collected droplets The device 29 is cooled and delivered to the low temperature humidifier 28 for cyclic spraying;
  • a condensed dew point temperature sensor 25 is disposed inside the exhaust gas flow passage 20 for sensing the temperature of the airflow after being condensed by the low temperature humidifier 28, and may be a wet bulb thermometer or a dry bulb thermometer and a relative humidity meter Matching
  • a controller 26a connects the dew point temperature sensor 22, the cooler 29 and the condensed dew point temperature sensor 25, and uses the dew point temperature sensed by the dew point temperature sensor 22 as a reference temperature, and the condensation dew point
  • the condensed dew point temperature sensed by the temperature sensor 25 is fed back to the controller 26, which in turn controls the degree of cooling of the cooler 29 to control the condensation of the gas stream dew point temperature through the low temperature humidifier 28 to near the reference temperature.
  • a precooler 27 may be further disposed, and the precooler 27 is disposed inside the exhaust gas flow passage 20 and located at the humidifier 22 or the low temperature humidifier.
  • the upstream end of 28 reduces the load on the condenser 23 or the low temperature humidifier 28.
  • the present invention first uses the dew point temperature sensor 21 Sensing the dew point temperature of the atmosphere as the reference temperature (corresponding to a point in the moisture map (labeled as point A) indicating the humidity property of the atmosphere); spraying the water mist by the humidifier 22 (or the low temperature humidifier 28) Increase the humidity of the exhaust gas stream (a corresponding point in the moisture map (labeled as point B) indicates the humidity property of the exhaust gas after humidification, usually located at the relative humidity saturation online); then the condenser 23 (or the low temperature increase) The humidifier 28) condenses the humidified exhaust gas stream, and after the condensed dew point temperature sensor 25 senses the condensation dew point temperature, and controls the condensed air flow dew point temperature by the controller 26 (or 26a).
  • the humidity property of the exhaust gas is first humidified from point A to point B, and then due to condensation Wet to the point C, since the points A and C in FIG moisture near the longitudinal position of the contour, reverse this trend before and after the exhaust gas passes the humidity ratio of the present invention process almost unchanged.
  • the sump 24 (or 24a) is from the humidifier 22 and the condenser 23 (or The droplets collected by the low-temperature humidifier 28) will hardly increase or decrease after being sprayed, and have little effect of generating waste water; and the condensation generated by circulating the collected droplets and condensing
  • the concentration of volatile organic compounds in the liquid is getting more and more Concentration, the liquid droplets collected by the liquid collection tank 24 (or 24a) can be taken out for volatile organic matter recovery treatment in a timely manner, thereby improving the recovery concentration of volatile organic compounds for reuse.

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  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Automation & Control Theory (AREA)
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Abstract

一种挥发性有机物处理方法及装置，该方法包括有：一露点温度感知步骤，感知大气的露点温度作为基准温度；一增湿及冷凝步骤，喷洒水雾令废气气流增加湿度且予以冷凝而产生含有挥发性有机物的凝结液；一冷凝后露点温度感知步骤，感知冷凝处理后的气流温度；一液滴收集步骤，收集增湿及冷凝步骤所滴落的液滴，并将所收集液滴用于循环喷洒而增湿及冷凝；以及一控制步骤，控制冷凝处理后的气流温度接近于基准温度。本发明具有几乎不会产生废水且提高挥发性有机物回收浓度以再利用的功效，还具有洗涤悬浮微粒的功效。

Description

挥发性有机物处理方法及装置 技术领域
本发明是有关一种挥发性有机物处理方法及装置，尤指一种喷洒水雾令待处理废 气增加湿度， 且借由冷凝作用将增湿后废气除湿， 而让废气于处理前后的湿度比保持 几乎不变的设计。
背景技术
生活和生产中广泛应用的有机溶剂， 在室温下就极易挥发成气体， 故又名挥发性 有机物（Volati le Organic Compounds , VOCs)， 而多数的挥发性有机物对人体有一定 毒性， 必须加以处理； 然而， 若制程所产生的废气中含有高沸点低蒸气压的水溶性挥 发性有机物， 通常会先利用冷凝装置予以分离， 再由后续的净化装置对未被分离的挥 发性有机物， 进行诸如焚化或是吸脱附浓缩后冷凝的净化处理。
再次， 如 「图 1」 所示， 现有用以将水溶性挥发性有机物自废气中予以分离的冷 凝装置， 通常于一废气气流通道 10内部设置有一冷凝器 11， 让通过该冷凝器 11的 废气温度降至露点温度以下，而利用挥发性有机物本身的凝结以及凝结水滴的吸附作 用， 将废气中所含的水溶性挥发性有机物予以冷凝分离； 接着， 再于该冷凝器 11的 下游端设置一除雾器 12或是第二冷凝器（图中未示）， 让粒径较小的挥发性有机物及 水气成长并予以捕捉分离或是二次冷凝； 再者， 被该冷凝器 11或是二次冷凝所冷凝 分离与被该除雾器 12所捕捉分离的液滴， 滴落至设置于该冷凝器 11与该除雾器 12 下方的集液槽 13; 然而， 由于滴落至该冷凝器集液槽 13的液滴所含有的挥发性有机 物浓度并不高， 不但难以将挥发性有机物回收再利用， 且会产生大量含有挥发牲有机 物的废水， 所产生的大量废水就必须进一步处理。
发明内容
本发明所要解决的主要技术问题在于， 克服现有技术存在的产生大量废水的问 题， 而提供一种一种挥发性有机物处理方法及装置， 其具有几乎不会产生废水且具有 提高挥发性有机物回收浓度以再利用的功效， 还具有洗涤悬浮微粒的功效。 本发明解决其技术问题所采用的技术方案是：
一种挥发性有机物处理方法， 用以处理含有挥发性有机物的废气气流，亦可同步 洗涤悬浮微粒， 包括有： 一露点温度感知歩骤， 感知大气的露点温度作为基准温度； 一增湿及冷凝歩骤，喷洒水雾令废气气流增加湿度且予以冷凝而产生含有挥发性有机 物的凝结液； 一冷凝后露点温度感知步骤， 感知冷凝处理后的气流温度； 一液滴收集 歩骤， 收集增湿及冷凝歩骤所滴落的液滴， 并将所收集液滴用于循环喷洒而增湿及冷 凝； 以及一控制歩骤， 控制冷凝处理后的气流温度接近于基准温度。
此外， 该增湿及冷凝步骤是喷洒低温水雾而同步增湿及冷凝， 或是该增湿及冷 凝步骤是喷洒常温水雾而先增湿后冷凝。又， 进一步于该增湿及冷凝步骤前增加一预 冷步骤。
再者， 本发明的挥发性有机物处理装置的第一实施例， 用以处理含有挥发性有 机物的废气气流， 而包括有： 一露点温度感知器， 设置于一废气气流通道外部而用以 感知大气的露点温度； 一增湿器， 设置于该废气气流通道内部， 用以对通过的废气气 流喷洒水雾增加湿度， 另可用以洗涤悬浮微粒； 一冷凝器， 设置于该废气气流通道内 部且位于该增湿器的下游端，用以将增湿后的废气气流冷凝而产生含有挥发性有机物 的凝结液；一集液槽，设置于该废气气流通道内部且位于该增湿器与该冷凝器的下方， 用以承接自该增湿器与该冷凝器所滴落的液滴，并将所收集液滴输送至增湿器而循环 喷洒； 一冷凝后露点温度感知器， 设置于该废气气流通道内部而用以感知冷凝处理后 的气流温度； 以及一控制器， 连结该露点温度感知器、 该冷凝器与该冷凝后露点温度 感知器， 而以该露点温度感知器所感知的露点温度作为基准温度， 并将该冷凝后露点 温度感知器所感知的冷凝后露点温度回授至该控制器， 进而控制该冷凝器的冷凝程 度， 以控制通过该冷凝器的气流露点温度冷凝至接近基准温度。
另者， 本发明的挥发性有机物处理装置的第二实施例， 用以处理含有挥发性有 机物的废气气流， 而包括有： 一露点温度感知器， 设置于一废气气流通道外部而用以 感知大气的露点温度； 一低温增湿器， 设置于该废气气流通道内部， 用以对通过的废 气气流喷洒水雾增加湿度， 且降温冷凝而产生含有挥发性有机物的凝结液， 另可用以 洗涤悬浮微粒； 一集液槽， 设置于该废气气流通道内部且位于该低温增湿器下方， 用 以承接自该低温增湿器所滴落的液滴，并将所收集液滴借一冷却器冷却且输送至该低 温增湿器而循环喷洒； 一冷凝后露点温度感知器， 设置于该废气气流通道内部而用以 感知冷凝处理后的气流温度； 以及一控制器， 连结该露点温度感知器、 该冷却器与该 冷凝后露点温度感知器， 而以该露点温度感知器所感知的露点温度作为基准温度， 并 将该冷凝后露点温度感知器所感知的冷凝后露点温度回授至该控制器，进而控制该冷 却器的冷却程度， 以控制通过该低温增湿器的气流露点温度冷凝至接近基准温度。
然而，进一歩设置一预冷器， 而该预冷器设置于该废气气流通道内部且位于该增 湿器或该低温增湿器的上游端。
本发明的有益效果是，其具有几乎不会产生废水且具有提高挥发性有机物回收浓 度以再利用的功效， 还具有洗涤悬浮微粒的功效。
附图说明
下面结合附图和实施例对本发明进一步说明。
图 1是现有挥发性有机物处理装置的结构示意图。
图 2是本发明第一实施例的结构示意图。
图 3是本发明第二实施例的结构示意图。
图 4是本发明操作过程的湿度性质于湿气图中的变化示意图。
图中标号说明：
10废气气流通道
1 1冷凝器
12除雾器
13集液槽
20废气气流通道
21露点温度感知器
22增湿器
23冷凝器
24、 24a集液槽
25冷凝后露点温度感知器
26、 26a控制器
27预冷器 28低温增湿器
29冷却器
具体实施方式
首先， 请参阅 「图 2」 所示， 本发明的挥发性有机物处理装置的第一实施例， 包括：
一露点温度感知器 21， 设置于一废气气流通道 20外部而用以感知大气的露点 温度， 而可为湿球温度计或为干球温度计与相对湿度计的搭配；
一增湿器 22， 设置于该废气气流通道 20内部， 用以对通过的废气气流喷洒水 雾增加湿度， 另可用以洗涤悬浮微粒；
一冷凝器 23， 设置于该废气气流通道 20内部且位于该增湿器 22的下游端，用 以将增湿后的废气气流冷凝而产生含有挥发性有机物的凝结液；
一集液槽 24， 设置于该废气气流通道 20 内部且位于该增湿器 22与该冷凝器 23的下方， 用以承接自该增湿器 22与该冷凝器 23所滴落的液滴， 并将所收集液滴 输送至该增湿器 22而循环喷洒；
一冷凝后露点温度感知器 25， 设置于该废气气流通道 20内部而用以感知经过 该冷凝器 23冷凝处理后的气流温度， 而可为湿球温度计或为干球温度计与相对湿度 计的搭配；
一控制器 26 , 连结该露点温度感知器 22、 该冷凝器 23与该冷凝后露点温度感 知器 25， 而以该露点温度感知器 22所感知的露点温度作为基准温度， 并将该冷凝后 露点温度感知器 25所感知的冷凝后露点温度回授至该控制器 26， 进而控制通过该冷 凝器 23的冷凝程度， 以控制通过该冷凝器 23的气流露点温度冷凝至接近基准温度。
接着， 请参阅 「图 3」 所示， 本发明的挥发性有机物处理装置的第二实施例， 包括：
一露点温度感知器 21 , 设置于一废气气流通道 20外部而用以感知大气的露点 温度， 而可为湿球温度计或为干球温度计与相对湿度计的搭配；
一低温增湿器 28， 设置于该废气气流通道 20内部， 用以对通过的废气气流喷 洒水雾增加湿度， 且降温冷凝而产生含有挥发性有机物的凝结液， 另可用以洗涤悬浮 微粒； 一集液槽 24a， 设置于该废气气流通道 20内部且位于该低温增湿器 28下方， 用以承接自该低温增湿器 28所滴落的液滴，并将所收集液滴借一冷却器 29冷却且输 送至该低温增湿器 28而循环喷洒；
一冷凝后露点温度感知器 25， 设置于该废气气流通道 20内部而用以感知经过 该低温增湿器 28冷凝处理后的气流温度， 而可为湿球温度计或为干球温度计与相对 湿度计的搭配；
一控制器 26a， 连结该露点温度感知器 22、 该冷却器 29与该冷凝后露点温度 感知器 25， 而以该露点温度感知器 22所感知的露点温度作为基准温度， 并将该冷凝 后露点温度感知器 25所感知的冷凝后露点温度回授至该控制器 26, 进而控制该冷却 器 29的冷却程度，以控制通过该低温增湿器 28的气流露点温度冷凝至接近基准温度。
此外， 若待处理废气的温度较高时， 则可进一歩设置一预冷器 27， 而该预冷器 27设置于该废气气流通道 20内部且位于该增湿器 22或该低温增湿器 28的上游端， 以降低该冷凝器 23或该低温增湿器 28的负荷。
基于上述构成， 请再参阅 「图 4」 的湿气图 (横轴为千球温度， 纵轴为湿度比， 上界为相对湿度饱和线)所示，本发明先借该露点温度感知器 21感知大气的露点温度 作为基准温度 (可于湿气图中对应出一点（标示为点 A)表示大气的湿度性质）； 再由该 增湿器 22 (或该低温增湿器 28)喷洒水雾令废气气流增加湿度（可于湿气图中对应出 一点（标示为点 B)表示废气增湿后的湿度性质， 通常会位于相对湿度饱和在线）； 接 着以该冷凝器 23 (或该低温增湿器 28)将增湿后的废气气流冷凝， 且以该冷凝后露点 温度感知器 25感知冷凝处理后的气流露点温度， 并以该控制器 26 (或 26a)控制冷凝 后的气流露点温度接近于基准温度 (可于湿气图中对应出一点（标示为点 C)表示废气 冷凝后的湿度性质）； 因此， 废气的湿度性质先由点 A增湿至点 B， 再因冷凝作用而 除湿至点 C， 而由于点 A与点 C于湿气图中的纵轴位置近乎等高， 遂令废气经过本发 明处理前后的湿度比近乎不变。
是以， 因废气于处理前后的湿度比不变 (亦即废气处理前后的含水率不变）， 故 该集液槽 24 (或 24a)自该增湿器 22及该冷凝器 23 (或该低温增湿器 28)所收集的液 滴， 经过循环喷洒后几乎不会增加也不会减少， 而具有几乎不会产生废水的功效； 另 因将所收集液滴循环喷洒， 冷凝所产生的凝结液内含的挥发性有机物浓度就越来越 浓， 遂可适时将该集液槽 24 (或 24a)所收集的液滴导出进行挥发性有机物的回收处 理， 则具有提高挥发性有机物回收浓度以再利用的功效。
以上所述， 仅是本发明的较佳实施例而已， 并非对本发明作任何形式上的限制, 凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均 仍属于本发明技术方案的范围内。
综上所述， 本发明在结构设计、使用实用性及成本效益上， 完全符合产业发展所 需， 且所揭示的结构亦是具有前所未有的创新构造， 具有新颖性、 创造性、 实用性， 符合有关发明专利要件的规定， 故依法提起申请。

Claims

权利要求书
1 . 一种挥发性有机物处理方法， 用以处理含有挥发性有机物的废气气流， 其特 征在于， 包括：
一露点温度感知步骤， 感知大气的露点温度作为基准温度；
一增湿及冷凝步骤，喷洒水雾令废气气流增加湿度且予以冷凝而产生含有挥发性 有机物的凝结液；
一冷凝后露点温度感知步骤， 感知冷凝处理后的气流温度；
一液滴收集步骤， 收集增湿及冷凝步骤所滴落的液滴， 并将所收集液滴用于循环 喷洒而增湿及冷凝；
一控制步骤， 控制冷凝处理后的气流温度接近于基准温度。
2. 根据权利要求 1所述的挥发性有机物处理方法， 其特征在于， 所述增湿及冷 凝歩骤是喷洒低温水雾而同歩增湿及冷凝。
3. 根据权利要求 1所述的挥发性有机物处理方法， 其特征在于， 所述增湿及冷 凝步骤是喷洒常温水雾而先增湿后冷凝。
4. 根据权利要求 2或 3所述的挥发性有机物处理方法， 其特征在于， 进一步于 所述增湿及冷凝步骤前增加一预冷歩骤。
5. —种挥发性有机物处理装置， 用以处理含有挥发性有机物的废气气流， 其特 征在于， 包括：
一露点温度感知器， 设置于一废气气流通道外部而用以感知大气的露点温度； 一增湿器， 设置于该废气气流通道内部， 用以对通过的废气气流喷洒水雾增加湿 度；
一冷凝器， 设置于该废气气流通道内部且位于该增湿器的下游端， 用以将增湿后 的废气气流冷凝而产生含有挥发性有机物的凝结液；
一集液槽， 设置于该废气气流通道内部且位于该增湿器与该冷凝器的下方，用以 承接自该增湿器与该冷凝器所滴落的液滴， 并将所收集液滴输送至增湿器而循环喷 洒；
一冷凝后露点温度感知器，设置于该废气气流通道内部而用以感知冷凝处理后的 气流温度；
一控制器， 连结该露点温度感知器、 该冷凝器与该冷凝后露点温度感知器， 而以 该露点温度感知器所感知的露点温度作为基准温度，并将该冷凝后露点温度感知器所 感知的冷凝后露点温度回授至该控制器， 进而控制该冷凝器的冷凝程度， 以控制通过 该冷凝器的气流露点温度冷凝至接近基准温度。
6. 根据权利要求 5所述的挥发性有机物处理装置， 其特征在于， 进一步设置一 预冷器， 而该预冷器设置于该废气气流通道内部且位于该增湿器的上游端。
7. 一种挥发性有机物处理装置， 用以处理含有挥发性有机物的废气气流， 其特 征在于， 包括- 一露点温度感知器， 设置于一废气气流通道外部而用以感知大气的露点温度； 一低温增湿器， 设置于该废气气流通道内部， 用以对通过的废气气流喷洒水雾增 加湿度， 且降温冷凝而产生含有挥发性有机物的凝结液；
一集液槽， 设置于该废气气流通道内部且位于该低温增湿器下方， 用以承接自该 低温增湿器所滴落的液滴，并将所收集液滴借一冷却器冷却且输送至该低温增湿器而 循环喷洒；
一冷凝后露点温度感知器，设置于该废气气流通道内部而用以感知冷凝处理后的 气流温度；
一控制器， 连结该露点温度感知器、 该冷却器与该冷凝后露点温度感知器， 而以 该露点温度感知器所感知的露点温度作为基准温度，并将该冷凝后露点温度感知器所 感知的冷凝后露点温度回授至该控制器， 进而控制该冷却器的冷却程度， 以控制通过 该低温增湿器的气流露点温度冷凝至接近基准温度。
8. 根据权利要求 7所述的挥发性有机物处理装置， 其特征在于， 进一步设置一 预冷器， 而所述预冷器设置于所述废气气流通道内部且位于所述低温增湿器的上游 而。
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