JP3302956B2 - Waste liquid concentration treatment equipment - Google Patents
Waste liquid concentration treatment equipmentInfo
- Publication number
- JP3302956B2 JP3302956B2 JP28921099A JP28921099A JP3302956B2 JP 3302956 B2 JP3302956 B2 JP 3302956B2 JP 28921099 A JP28921099 A JP 28921099A JP 28921099 A JP28921099 A JP 28921099A JP 3302956 B2 JP3302956 B2 JP 3302956B2
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- tank
- water
- concentration treatment
- evaporating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002699 waste material Substances 0.000 title claims description 141
- 239000007788 liquid Substances 0.000 title claims description 140
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 238000001704 evaporation Methods 0.000 claims description 52
- 238000001816 cooling Methods 0.000 claims description 38
- 238000010438 heat treatment Methods 0.000 claims description 30
- 230000008020 evaporation Effects 0.000 claims description 26
- 238000009833 condensation Methods 0.000 claims description 18
- 230000005494 condensation Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 239000012141 concentrate Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims 1
- 238000005382 thermal cycling Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 15
- 239000012153 distilled water Substances 0.000 description 8
- 238000009835 boiling Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、廃液から水分を分
離することによって廃液を濃縮するための装置に関す
る。The present invention relates to an apparatus for concentrating waste liquid by separating water from the waste liquid.
【０００２】[0002]
【従来の技術】近年、地球環境の汚染が問題となってお
り、そのため無電解Ｎｉメッキ液やイオン交換器の逆洗
水などの廃液の処理が問題となっている。そのため、こ
れまでも種々の廃液処理方法や廃液処理装置が提案され
ている。そして、工場等で排出される廃液は、直ちにそ
の場所で化学的あるいは物理的に処理して無害化される
ことが望ましい。2. Description of the Related Art In recent years, pollution of the global environment has become a problem, and therefore, treatment of waste liquid such as an electroless Ni plating solution and backwash water of an ion exchanger has become a problem. Therefore, various waste liquid treatment methods and waste liquid treatment apparatuses have been proposed. It is desirable that the waste liquid discharged in a factory or the like be immediately rendered chemically or physically harmless at the place.
【０００３】しかし、このような廃液処理には大規模な
設備や専用の施設を必要とするので、工場などで排出さ
れた廃液を直ちにその場所で処理することは困難であ
る。そのため、実際には廃液をタンクやプールに溜めて
おき、定期的に廃液を処理施設へ輸送し、廃液処理施設
で処理している。However, such waste liquid treatment requires large-scale equipment and dedicated facilities, and it is difficult to immediately treat waste liquid discharged from a factory or the like at the place. Therefore, the waste liquid is actually stored in a tank or a pool, and the waste liquid is periodically transported to a treatment facility, where the waste liquid is treated.
【０００４】[0004]
【発明が解決しようとする課題】上記のように工場で発
生した廃液はタンクやプール内に溜められるので、大量
に廃液の出る場所では、廃液を溜めるために大型のタン
クやプールが必要となる。しかし、廃液に含まれる成分
の大部分は水分であるから、廃液中の化学的廃棄物等と
水分とを分離することにより、廃液量を減らしてタンク
やプールも小さなもので済ませることが可能になる。As described above, the waste liquid generated in the factory is stored in a tank or a pool. Therefore, in a place where a large amount of waste liquid is discharged, a large tank or a pool is required to store the waste liquid. . However, since most of the components contained in the waste liquid are water, the separation of chemical waste and water in the waste liquid makes it possible to reduce the amount of waste liquid and reduce the size of tanks and pools. Become.
【０００５】このため、従来からも、イオン交換や加熱
によって廃液を濃縮する装置が用いられているが、イオ
ン交換方式では効率が悪く、廃液の濃縮度が低かった。
また、加熱方式では、加熱によって廃液から分離した水
蒸気を回収する必要があるためにエネルギー利用効率が
悪く、廃液を濃縮するのに多量のエネルギーを消費し、
処理コストが高くついていた。また、廃液を処理するの
に多量のエネルギーを消費すると、廃液が処理される一
方で、地球資源の浪費や温暖化等の問題が大きくなる恐
れがあった。[0005] For this reason, an apparatus for concentrating waste liquid by ion exchange or heating has been conventionally used. However, the ion exchange method is inefficient and the concentration of waste liquid is low.
In addition, in the heating method, it is necessary to recover the water vapor separated from the waste liquid by heating, so that the energy use efficiency is low, and a large amount of energy is consumed to concentrate the waste liquid,
Processing costs were high. Further, when a large amount of energy is consumed to treat the waste liquid, while the waste liquid is treated, there is a possibility that problems such as waste of global resources and global warming may increase.
【０００６】本発明は、上記の従来例の問題点に鑑みて
なされたものであり、その目的とするところは、エネル
ギー利用効率が高く、また廃液の濃縮度が高い廃液濃縮
処理装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a waste liquid concentration treatment apparatus having high energy use efficiency and high waste liquid concentration. It is in.
【０００７】[0007]
【課題を解決するための手段】請求項１に記載の廃液濃
縮処理装置は、廃液中の水分を加熱蒸発させる蒸発槽
と、前記蒸発槽で蒸発した水分を含んだ蒸気を回収し、
これを冷却することによって空気と水分とに分離する凝
縮槽と、前記蒸発槽内の廃液を加熱する放熱部及び前記
凝縮槽内の蒸気を冷却する冷却部を備えた熱サイクル装
置とを備えた廃液濃縮処理装置において、前記凝縮槽内
に配置された冷却部の下方に、孔が下面から上面へ連通
した多孔質材料を配置し、該多孔質部材の下方に、前記
蒸発槽から凝縮槽へ導かれた蒸気の入口を設け、前記冷
却部及び前記多孔質材料を前記凝縮槽内で水中に浸かる
ように配置したことを特徴としている。According to a first aspect of the present invention, there is provided a waste liquid concentrating apparatus, comprising: an evaporating tank for heating and evaporating water in a waste liquid; and a vapor containing the water evaporated in the evaporating tank.
The heat cycle device was provided with a condensing tank that separates it into air and moisture by cooling it, a heat radiating unit that heats the waste liquid in the evaporation tank, and a cooling unit that cools the vapor in the condensing tank. In the waste liquid concentration treatment device , in the condensing tank,
A hole communicates from the lower surface to the upper surface below the cooling unit arranged in
Arranged porous material, below the porous member, the above
An inlet for the steam led from the evaporation tank to the condensation tank is provided,
Immersing the cooling part and the porous material in water in the condensing tank
It is characterized by being arranged like this.
【０００８】請求項２に記載の廃液濃縮処理装置は、請
求項１に記載した廃液濃縮処理装置における前記冷却部
及び前記多孔質材料を、前記凝縮槽の側面におけるオー
バーフロー管の接続位置よりも下方に配置したことを特
徴としている。According to a second aspect of the present invention, there is provided a waste liquid concentration processing apparatus according to the first aspect, wherein the cooling unit is provided in the waste liquid concentration processing apparatus.
And the porous material is
It is characterized in that it is disposed below the connection position of the bar flow pipe .
【０００９】請求項３に記載の廃液濃縮処理装置は、請
求項１又は２に記載した廃液濃縮処理装置における前記
蒸発槽内を減圧する手段を備えたことを特徴としてい
る。According to a third aspect of the present invention, there is provided a waste liquid concentration processing apparatus according to the first or second aspect, further comprising means for reducing the pressure in the evaporating tank.
【００１０】請求項４に記載の廃液濃縮処理装置は、請
求項１、２又は３に記載した廃液濃縮処理装置におい
て、前記蒸発槽に供給するための廃液を溜める予備槽を
備え、該予備槽にも前記熱サイクル装置の放熱部を設け
たことを特徴としている。According to a fourth aspect of the present invention, there is provided the waste liquid concentration processing apparatus according to the first, second, or third aspect, further comprising a preliminary tank for storing waste liquid to be supplied to the evaporation tank. Also, a heat radiator of the heat cycle device is provided.
【００１１】[0011]
【作用】請求項１に記載の廃液濃縮処理装置にあって
は、熱サイクル装置を用い、その放熱側（放熱部）で蒸
発槽内の廃液を加熱し、吸熱側（冷却部）で凝縮槽内の
蒸気を冷却しているので、１つの熱サイクル内で効率的
に水分の蒸発と凝縮を行わせることができる。従って、
エネルギー利用効率が高く、少ないエネルギーによって
多量の廃液を濃縮することができる。また、加熱方式で
あるから、高い濃縮度を達成することができる。In the waste liquid concentration treatment apparatus according to the first aspect, a waste heat in the evaporation tank is heated on the heat radiating side (heat radiating section) using a heat cycle apparatus, and the condensation tank is heated on the heat absorbing side (cooling section). Since the internal steam is cooled, the evaporation and condensation of water can be efficiently performed in one heat cycle. Therefore,
Energy use efficiency is high, and a large amount of waste liquid can be concentrated with little energy. In addition, because of the heating method, a high concentration can be achieved.
【００１２】さらに、この廃液濃縮処理装置にあって
は、凝縮槽内に蒸気（空気と水分）が導入されると、こ
の蒸気は水中で多孔質材料を通過することによって細分
化されて気泡となり、面積を広げられた後、凝縮槽内の
冷却部に達するので、凝縮槽内における冷却部との接触
面積が大きくなる。従って、水分の凝縮効率が高くな
り、高効率で水分と空気とを分離することができる。 Further, in this waste liquid concentration treatment apparatus, when steam (air and moisture) is introduced into the condensing tank, the steam passes through the porous material in water and is fragmented into bubbles. After the area is expanded, the cooling unit in the condensing tank is reached, so that the contact area with the cooling unit in the condensing tank increases. Therefore, the condensation efficiency of moisture is increased, and moisture and air can be separated with high efficiency.
【００１３】請求項３に記載の廃液濃縮処理装置にあっ
ては、蒸発槽内を減圧する手段を備えているから、蒸発
槽内を減圧することにより蒸発槽内の廃液の沸点を下
げ、低温において廃液を化学分解させることなく水分だ
けを活発に蒸発させることができる。The waste liquid concentration treatment apparatus according to the third aspect is provided with a means for reducing the pressure in the evaporation tank, so that the boiling point of the waste liquid in the evaporation tank is reduced by reducing the pressure in the evaporation tank. In this case, only water can be actively evaporated without chemically decomposing the waste liquid.
【００１４】請求項４に記載の廃液濃縮処理装置にあっ
ては、蒸発槽に供給するための廃液を溜める予備槽にも
熱サイクル装置の放熱部を設けているので、熱サイクル
装置を利用してあらかじめ廃液を暖めておくことがで
き、蒸発槽で速やかに廃液を温度上昇させることがで
き、エネルギーを有効利用しつつ廃液濃縮処理装置の効
率を高めることができる。In the waste liquid concentration treatment apparatus according to the fourth aspect, since the heat radiating portion of the heat cycle device is provided also in the spare tank for storing the waste liquid to be supplied to the evaporation tank, the heat cycle device is used. The waste liquid can be preliminarily warmed in advance, the temperature of the waste liquid can be quickly raised in the evaporating tank, and the efficiency of the waste liquid concentration treatment device can be increased while effectively using energy.
【００１５】[0015]
【発明の実施の形態】図１は本発明の一実施形態による
廃液濃縮処理装置の構成を示す概略図、図２は当該廃液
濃縮処理装置の設置例を示す図である。図２において、
符号１は本発明の廃液濃縮処理装置を示し、２は廃液Ａ
を溜めておくためのタンクやプール等の廃液貯蔵設備２
を示している。いったん廃液貯蔵設備２内に溜められた
廃液Ａは、ポンプ３によってｐＨ調整槽４へ汲み出さ
れ、ｐＨ調整槽４で酸５又はアルカリ液６と混合撹拌さ
れる。こうしてｐＨ調整された廃液Ｂは、廃液濃縮処理
装置１へ送られる。もちろん、必要なければｐＨ調整の
工程は省略することができる。FIG. 1 is a schematic diagram showing a configuration of a waste liquid concentration processing apparatus according to an embodiment of the present invention, and FIG. 2 is a view showing an example of installation of the waste liquid concentration processing apparatus. In FIG.
Reference numeral 1 denotes a waste liquid concentration treatment apparatus of the present invention, and 2 denotes waste liquid A.
Waste storage facilities such as tanks and pools for storing water
Is shown. The waste liquid A once stored in the waste liquid storage facility 2 is pumped out to the pH adjusting tank 4 by the pump 3 and is mixed and stirred with the acid 5 or the alkaline liquid 6 in the pH adjusting tank 4. The waste liquid B thus adjusted in pH is sent to the waste liquid concentration treatment device 1. Of course, if not necessary, the pH adjustment step can be omitted.
【００１６】廃液濃縮処理装置１内に送り込まれた廃液
Ｂは、廃液濃縮処理装置１内で水分と分離されて約１／
１０〜１／２０の体積に濃縮され、濃縮された濃厚廃液
Ｄは廃液濃縮処理装置１から濃厚廃液回収槽７へ回収さ
れる。一方、廃液Ｂから分離された水分（水Ｃ）は廃液
濃縮処理装置１内で回収され、廃液濃縮過程で生じた蒸
気から分離された空気は廃液濃縮処理装置１から大気中
に排出される。The waste liquid B sent into the waste liquid concentration processing apparatus 1 is separated from water in the waste liquid concentration processing apparatus 1 by about 1 /
The concentrated waste liquid D concentrated to a volume of 10 to 1/20 and concentrated is recovered from the waste liquid concentration treatment device 1 to the concentrated waste liquid recovery tank 7. On the other hand, the water (water C) separated from the waste liquid B is collected in the waste liquid concentration processing device 1, and the air separated from the vapor generated in the waste liquid concentration process is discharged from the waste liquid concentration treatment device 1 to the atmosphere.
【００１７】濃厚廃液回収槽７内の濃縮された濃厚廃液
Ｄは、廃液処理施設へ輸送され、そこで処理される。一
方、廃液から分離された水Ｃ（蒸留水）は、再利用して
もよく、あるいは下水などに放流してもよい。The concentrated waste liquid D concentrated in the concentrated waste liquid recovery tank 7 is transported to a waste liquid treatment facility where it is treated. On the other hand, the water C (distilled water) separated from the waste liquid may be reused or discharged into sewage or the like.
【００１８】このように廃液濃縮処理装置１を用いれ
ば、廃液から大部分の水分を分離して廃液を濃縮し、そ
の容積を小さくすることができるので、廃液貯蔵設備２
を非常に小規模なもので済ませることができる。また、
廃液が濃縮されて体積が小さくなるので、輸送コストも
安価になる。When the waste liquid concentrating apparatus 1 is used as described above, most of the water can be separated from the waste liquid to concentrate the waste liquid and reduce the volume thereof.
Can be done on a very small scale. Also,
Since the waste liquid is concentrated to reduce the volume, the transportation cost is also reduced.
【００１９】つぎに、本発明の廃液濃縮処理装置１の構
造を図１により説明する。廃液濃縮処理装置１内には、
予備タンク１１、蒸発槽１２、凝縮槽１３、蒸留水貯槽
１４、熱サイクル装置１５、排気用の真空ポンプ２５が
設けられている。Next, the structure of the waste liquid concentration treatment apparatus 1 of the present invention will be described with reference to FIG. In the waste liquid concentration treatment device 1,
A preliminary tank 11, an evaporation tank 12, a condensation tank 13, a distilled water storage tank 14, a heat cycle device 15, and a vacuum pump 25 for exhaust are provided.
【００２０】予備タンク１１には、外部の廃液貯蔵設備
２やｐＨ調整槽４から廃液Ｂを供給するための廃液供給
管１７が接続されており、バルブ１８を開閉制御するこ
とによって予備タンク１１内に一定範囲のレベルの廃液
Ｂが溜められるようになっている。予備タンク１１の底
面と蒸発槽１２の底面とはパイプ１９によって接続され
ており、パイプ１９には開閉弁２０が設けられている。
また、蒸発槽１２の底面からは濃厚廃液Ｄを濃厚廃液回
収槽７へ排出するための濃厚廃液排出管２１が設けられ
ており、濃厚廃液排出管２１にも開閉弁２２が設けられ
ている。A waste liquid supply pipe 17 for supplying waste liquid B from the external waste liquid storage facility 2 or the pH adjusting tank 4 is connected to the auxiliary tank 11. The waste liquid B in a certain range is stored in the tank. The bottom surface of the spare tank 11 and the bottom surface of the evaporating tank 12 are connected by a pipe 19, and the pipe 19 is provided with an on-off valve 20.
Further, a concentrated waste liquid discharge pipe 21 for discharging the concentrated waste liquid D to the concentrated waste liquid recovery tank 7 is provided from the bottom of the evaporating tank 12, and an opening / closing valve 22 is also provided in the concentrated waste liquid discharge pipe 21.
【００２１】蒸発槽１２の上面と凝縮槽１３の底面とは
蒸気回収管２３が接続されている。凝縮管１３の上面に
は、外部へ空気を排出するための排気管２４が出てお
り、排気管２４には真空ポンプ２５が設けられている。
また、凝縮槽１３の側面の所定高さからは開閉弁２７を
有するオーバーフロー管２６が出ており、オーバーフロ
ー管２６の先端は蒸留水貯槽１４の上面に接続されてい
る。さらに、凝縮槽１３の底面と蒸留水貯槽１４の上面
との間も開閉弁２９を有する排水管２８によって接続さ
れている。A vapor recovery pipe 23 is connected to the upper surface of the evaporation tank 12 and the bottom of the condensation tank 13. An exhaust pipe 24 for discharging air to the outside is provided on the upper surface of the condenser pipe 13, and the exhaust pipe 24 is provided with a vacuum pump 25.
An overflow pipe 26 having an opening / closing valve 27 protrudes from a predetermined height on the side surface of the condensation tank 13, and a tip of the overflow pipe 26 is connected to the upper surface of the distilled water storage tank 14. Further, the bottom surface of the condensation tank 13 and the top surface of the distilled water storage tank 14 are also connected by a drain pipe 28 having an on-off valve 29.
【００２２】熱サイクル装置１５は、熱媒を循環させて
一方（加熱部）で放熱し、他方（冷却部）で吸熱するも
のであって、例えば冷凍サイクルなどとして用いられて
いるものと同じ原理のものである。すなわち、この熱サ
イクル装置１５は、空冷式又は水冷式の冷凍機３０と、
蒸発槽１２内の底部近傍に配置された蛇管状の加熱部３
１（放熱用熱交換器）と、予備タンク１１内の底部近傍
に配置された蛇管状の予備加熱部３２（放熱用熱交換
器）と、コンデンサ３３と、アキュムレータ３４と、膨
張弁３５と、凝縮槽１３の底部近傍に配置された蛇管状
の冷却部３６（吸熱用熱交換器）と、蒸発槽１２の上部
に配置された蛇管状の冷却部３７（吸熱用熱交換器）と
によって構成されている。そして、冷凍機３０、加熱部
３１、予備加熱部３２、コンデンサ３３、アキュムレー
タ３４及び膨張弁３５の間は温循環配管３８によって結
ばれており、温循環配管３８内には冷凍機３０とコンデ
ンサ３３もしくは膨張弁３５の間で圧縮されて高温にな
った熱媒が循環する。膨張弁３５、冷却部３６、冷却部
３７及び冷凍機３０の間は、両冷却部３６、３７が並列
となるようにして冷循環配管３９によって結ばれてお
り、冷循環配管３９内には膨張弁３５を通過して断熱膨
張により低温になった冷媒が循環する。したがって、熱
サイクル装置１５を運転すると、予備加熱部３２は予備
タンク１１内の廃液Ｂと熱交換して予備タンク１１内の
廃液Ｂを加熱し、加熱部３１は蒸発槽１２内の廃液Ｂと
熱交換して加熱部３１内の廃液Ｂを加熱する。ただし、
加熱部３１と予備加熱部３２は直列に接続されており、
熱媒は加熱部３１を循環した後、予備加熱部３２に流れ
るので、加熱部３１の温度は高く（約６０〜８５℃）、
予備加熱部３２の温度はそれよりも低くなっている。一
方、冷却部３６と冷却部３７には並列に冷媒が流れ、冷
却部３６は凝縮槽１３内の蒸気と熱交換して凝縮槽１３
内の蒸気を冷却し、冷却部３７は蒸発槽１２内の蒸気と
熱交換して蒸発槽１２内の蒸気を冷却する。The heat cycle device 15 circulates a heat medium and radiates heat on one side (heating section) and absorbs heat on the other side (cooling section), for example, the same principle as that used as a refrigeration cycle or the like. belongs to. That is, the heat cycle device 15 includes an air-cooled or water-cooled refrigerator 30,
Serpentine heating unit 3 arranged near the bottom in evaporating tank 12
1 (heat-dissipating heat exchanger), a serpentine-shaped preheating unit 32 (heat-dissipating heat exchanger) disposed near the bottom of the auxiliary tank 11, a condenser 33, an accumulator 34, an expansion valve 35, It is composed of a serpentine cooling unit 36 (heat absorbing heat exchanger) arranged near the bottom of the condensing tank 13 and a serpentine cooling unit 37 (heat absorbing heat exchanger) arranged above the evaporating tank 12. Have been. The refrigerator 30, the heating unit 31, the pre-heating unit 32, the condenser 33, the accumulator 34, and the expansion valve 35 are connected by a warm circulation pipe 38. In the warm circulation pipe 38, the refrigerator 30 and the condenser 33 are connected. Alternatively, the heat medium that has been compressed and becomes high temperature circulates between the expansion valves 35. The expansion valve 35, the cooling unit 36, the cooling unit 37, and the refrigerator 30 are connected by a cooling circulation pipe 39 so that the cooling units 36 and 37 are arranged in parallel. The refrigerant cooled down by the adiabatic expansion passes through the valve 35 and circulates. Therefore, when the heat cycle device 15 is operated, the preliminary heating unit 32 exchanges heat with the waste liquid B in the preliminary tank 11 to heat the waste liquid B in the preliminary tank 11, and the heating unit 31 communicates with the waste liquid B in the evaporation tank 12. The waste liquid B in the heating unit 31 is heated by heat exchange. However,
The heating unit 31 and the preliminary heating unit 32 are connected in series,
After heating medium was circulated heating unit 31, flows through the preheating section 32, the temperature of the heating unit 31 is high (about 60 to 85 ° C.),
The temperature of the preheating unit 32 is lower than that. On the other hand, the refrigerant flows in parallel to the cooling unit 36 and the cooling unit 37, and the cooling unit 36 exchanges heat with the steam in the condensation tank 13 and
The cooling unit 37 exchanges heat with the steam in the evaporation tank 12 to cool the steam in the evaporation tank 12.
【００２３】蒸発槽１２の蓋部４０は内面周囲が二重に
なっていてドレン部４１が形成されており、ドレン部４
１内に冷却部３７が納められている。ドレン部４１の底
面には、ドレン部４１で凝縮した水を蒸気回収管２３か
ら凝縮槽１３に送るためのドレン水回収管１６が設けら
れており、ドレン水回収管１６の先端は蒸気回収管２３
に接続されている。また、凝縮槽１３内においては、冷
却部３６の下面側全体にわたって多孔質部材４２が配置
されており、多孔質部材４２は蒸気回収管２３と冷却部
３６との間を仕切っている。この実施形態では、多孔質
部材４２として、図３に示すように、粒径が１ｍｍ〜２
ｍｍ程度の多量のステンレスチップ４３を網籠４４内に
納めたものを用いており、ステンレスチップ４３の間に
孔（隙間）が形成されている。また、この多孔質部材４
２は、適宜洗浄できるよう、ボルト等の留め具４５によ
って固定されている。なお、多孔質部材４２としては、
孔の大きさが蒸気回収管２３の端部開口に比べて小さ
く、下面側から上面側へ蒸気が通過できるものであれば
よく、特に限定されるものではない。例えば、図３に示
したような多孔質部材４２に代えて、孔のあいたパイプ
を密着させて多数配列した多孔性パイプでもよく、連続
気泡の多孔質セラミックなどでもよい。The lid 40 of the evaporating tank 12 has a double inner periphery, and a drain 41 is formed.
The cooling unit 37 is housed in 1. A drain water recovery pipe 16 for sending water condensed in the drain section 41 from the steam recovery pipe 23 to the condensing tank 13 is provided on a bottom surface of the drain section 41, and a tip of the drain water recovery pipe 16 is a steam recovery pipe. 23
It is connected to the. Further, in the condensation tank 13, a porous member 42 is disposed over the entire lower surface side of the cooling unit 36, and the porous member 42 partitions between the steam recovery pipe 23 and the cooling unit 36. In this embodiment, as shown in FIG. 3, the porous member 42 has a particle size of 1 mm to 2 mm.
A large number of stainless steel chips 43 of about mm are contained in a mesh basket 44, and holes (gaps) are formed between the stainless steel chips 43. In addition, this porous member 4
2 is fixed by fasteners 45 such as bolts so that it can be appropriately cleaned. In addition, as the porous member 42,
The size of the hole is not particularly limited as long as it is smaller than the end opening of the steam recovery pipe 23 and allows steam to pass from the lower surface to the upper surface. For example, instead of the porous member 42 as shown in FIG. 3, a porous pipe in which a number of pipes with holes are closely arranged may be used, or an open-cell porous ceramic or the like may be used.
【００２４】つぎに、この廃液濃縮処理装置１による廃
液の濃縮処理過程を図１により説明する。外部の廃液貯
蔵設備２やｐＨ調整槽４から供給された予備タンク１１
内の廃液Ｂは、予備加熱部３２によって加熱される。廃
液Ｂは蒸発槽１２で加熱される前に予備タンク１１で予
備加熱されるので、蒸発槽１２において廃液Ｂを効率的
に加熱することができる。しかも、予備加熱部３２では
加熱部３１の残熱を利用しているので、別途熱源が必要
なく、熱サイクル装置１５の熱利用効率を高めることが
できる。また、廃液Ｂの補給用の開閉弁２０やオーバー
フロー管２６の開閉弁２７を用いる代わりに、これらに
代えて突沸防止、連続運転が可能なチューブポンプを使
用することも可能である。Next, the waste liquid concentration process by the waste liquid concentration apparatus 1 will be described with reference to FIG. Spare tank 11 supplied from external waste liquid storage facility 2 or pH adjusting tank 4
The waste liquid B inside is heated by the preliminary heating unit 32. Since the waste liquid B is pre-heated in the preliminary tank 11 before being heated in the evaporation tank 12, the waste liquid B can be efficiently heated in the evaporation tank 12. In addition, since the preheating unit 32 utilizes the residual heat of the heating unit 31, no separate heat source is required, and the heat utilization efficiency of the heat cycle device 15 can be increased. Instead of using the on-off valve 20 for replenishing the waste liquid B and the on-off valve 27 for the overflow pipe 26, a tube pump capable of preventing bumping and continuous operation can be used instead.
【００２５】通常運転時には、開閉弁２０が開かれてい
るので、蒸発槽１２内の水分が蒸発して減少すると、予
備タンク１１で予備加熱された廃液Ｂがパイプ１９を通
って蒸発槽１２へ補給され、加熱部３１によって約３５
〜５０℃の温度まで加熱される。同時に、真空ポンプ２
５を運転することによって凝縮槽１３内は高真空に保た
れており、蒸気回収管２３を介して蒸発槽１２内の蒸気
や空気が凝縮槽１３側へ引き抜かれることによって蒸発
槽１２内も高真空（例えば、約４０〜９０ｍｍＨｇ程
度）に保たれている。ここで、蒸発槽１２内の真空度と
加熱部３１による加熱温度との関係は、蒸発槽１２内圧
力における水の沸点が加熱部３１による加熱温度よりも
低くなるようにしている。During normal operation, since the on-off valve 20 is open, when the water in the evaporating tank 12 evaporates and decreases, the waste liquid B preheated in the preparatory tank 11 passes through the pipe 19 to the evaporating tank 12. Replenished, about 35 by heating unit 31
Heat to a temperature of ５０50 ° C. At the same time, vacuum pump 2
5, the inside of the condensing tank 13 is kept at a high vacuum, and the vapor and air in the evaporating tank 12 are drawn out to the condensing tank 13 through the vapor recovery pipe 23, so that the inside of the evaporating tank 12 is also high. The vacuum is maintained (for example, about 40 to 90 mmHg). Here, the relationship between the degree of vacuum in the evaporating tank 12 and the heating temperature by the heating unit 31 is such that the boiling point of water at the pressure in the evaporating tank 12 is lower than the heating temperature by the heating unit 31.
【００２６】したがって、蒸発槽１２内においては廃液
Ｂは水の沸点よりも高い温度で加熱されるので、廃液Ｂ
内の水分は沸騰して活発に蒸発し、蒸気回収管２３から
凝縮槽１３へ吸引される。これに対し、加熱部３１によ
る加熱温度が低いので、廃液Ｂ中の化学物質は分解する
ことがなく、したがって加熱により分解した化学物質が
蒸発して凝縮槽１３へ漏れることがほとんどない。Therefore, in the evaporating tank 12, the waste liquid B is heated at a temperature higher than the boiling point of water.
The water in the water boils and evaporates actively, and is sucked from the vapor recovery pipe 23 into the condensing tank 13. On the other hand, since the heating temperature of the heating unit 31 is low, the chemical substance in the waste liquid B is not decomposed, and therefore, the decomposed chemical substance by heating hardly leaks to the condensing tank 13.
【００２７】こうして水分が蒸発するに従って、蒸発槽
１２内の廃液Ｂは次第に濃厚となって蒸発槽１２内に溜
まる。蒸発槽１２内に濃厚廃液Ｄが溜まったら、開閉弁
２０を閉じて開閉弁２２を開き、濃厚廃液排出管２１か
ら濃厚廃液回収槽７へ濃厚廃液Ｄを排出する。こうして
濃厚廃液回収槽７内へ溜められた濃厚廃液Ｄは元の廃液
Ａの約１／１０〜１／２０程度の体積に濃縮されてい
る。したがって、輸送前の保管場所に広い面積をとら
ず、また輸送時にも体積が小さく、軽量であるので、輸
送コストも安価になる。As the water evaporates, the waste liquid B in the evaporating tank 12 gradually becomes thicker and accumulates in the evaporating tank 12. When the concentrated waste liquid D accumulates in the evaporation tank 12, the on-off valve 20 is closed and the on-off valve 22 is opened, and the concentrated waste liquid D is discharged from the concentrated waste liquid discharge pipe 21 to the concentrated waste liquid recovery tank 7. The concentrated waste liquid D thus collected in the concentrated waste liquid recovery tank 7 is concentrated to about 1/10 to 1/20 of the volume of the original waste liquid A. Therefore, the storage space before transportation does not take up a large area, and the volume is small and light during transportation, so that the transportation cost is reduced.
【００２８】蒸発槽１２内の上部では冷却部３７によっ
て蒸気が冷却され、廃液Ｂから蒸発した蒸気の一部は蒸
発槽１２内で凝縮する。この凝縮水が蒸発槽１２内の廃
液１２中に戻ると、廃液１２の温度が下がって効率が低
下する。このため、上部で凝縮した水はドレン部４１で
受けてドレン水回収管１６から凝縮槽１３へ回収するよ
うにしている。The vapor is cooled by the cooling section 37 in the upper part of the evaporation tank 12, and a part of the vapor evaporated from the waste liquid B is condensed in the evaporation tank 12. When the condensed water returns to the waste liquid 12 in the evaporating tank 12, the temperature of the waste liquid 12 decreases and the efficiency decreases. For this reason, the water condensed at the upper part is received by the drain part 41 and collected from the drain water recovery pipe 16 to the condensation tank 13.
【００２９】上記のようにして蒸発槽１２で蒸発した蒸
気（水分と空気）は蒸気回収管２３を通って凝縮槽１３
の底から凝縮槽１３内へ引き抜かれる。凝縮槽１３内に
入った蒸気は、そのままでは大きな塊となっているの
で、そのまま冷却部３６を通過すると冷却部３６との接
触面積が小さく、冷却効率が悪く、水分を含んだ空気が
排出されてしまう。これに対し、冷却部３６の直前に多
孔質部材４２を設けていると、凝縮槽１３内に入った蒸
気は多孔質部材４２を通過することによって細かな気泡
となって冷却部３７を通過する。この結果、蒸気と冷却
部３７との接触面積が大きくなり、気泡状の蒸気は効率
よく冷却される。こうして蒸気が効率よく冷却される
と、蒸気に含まれていた水分が凝縮して水Ｃとなって凝
縮槽１３内に回収され、水分を含まない乾燥した空気だ
けが排気管２４から大気中に排気される。The steam (moisture and air) evaporated in the evaporating tank 12 as described above passes through a steam collecting pipe 23 and is condensed in the condensing tank 13.
From the bottom of the condensing tank 13. Since the steam that has entered the condensing tank 13 forms a large lump as it is, if it passes through the cooling unit 36 as it is, the contact area with the cooling unit 36 is small, the cooling efficiency is poor, and air containing moisture is discharged. Would. On the other hand, when the porous member 42 is provided immediately before the cooling unit 36, the vapor that has entered the condensation tank 13 passes through the porous member 42, becomes fine bubbles, and passes through the cooling unit 37. . As a result, the contact area between the steam and the cooling section 37 is increased, and the bubble-like steam is efficiently cooled. When the steam is efficiently cooled in this manner, the moisture contained in the steam is condensed to become water C and collected in the condensing tank 13, and only the dried air containing no moisture is discharged from the exhaust pipe 24 to the atmosphere. Exhausted.
【００３０】したがって、本発明の廃液濃縮処理装置１
によれば、廃液Ａは濃厚廃液Ｄと純度の高い水と途中で
混入した空気とに分離され、濃厚廃液Ｄと水は回収さ
れ、空気は空気中に放出される。濃縮された濃厚廃液Ｄ
は処理施設へ輸送され、そこで処理される。また、通常
は、開閉弁２７は開かれており、凝縮槽１３内に溜まっ
た水は、一定水位以上になると、オーバーフロー管２６
から蒸留水貯槽１４へ流れ、蒸留水貯槽１４内に溜めら
れる。また、凝縮槽１３の洗浄時などには、開閉弁２９
を開くことにより凝縮槽１３内の水を排出管２８から蒸
留水貯槽１４へ抜くことができる。蒸留水貯槽１４内の
水は、再利用してもよく、下水などに放流してもよい。Therefore, the waste liquid concentration treatment apparatus 1 of the present invention
According to the method, the waste liquid A is separated into the concentrated waste liquid D, high-purity water, and air mixed in the middle, the concentrated waste liquid D and water are collected, and the air is released into the air. Concentrated concentrated waste liquid D
Is transported to a processing facility where it is processed. Normally, the on-off valve 27 is open, and when the water accumulated in the condensation tank 13 reaches a certain level or higher, the overflow pipe 26
From the water to the distilled water storage tank 14 and stored in the distilled water storage tank 14. When the condenser 13 is washed, the on-off valve 29 is used.
Is opened, the water in the condensation tank 13 can be drained from the discharge pipe 28 to the distilled water storage tank 14. The water in the distilled water storage tank 14 may be reused or discharged into sewage or the like.
【００３１】[0031]
【発明の効果】請求項１に記載の廃液濃縮処理装置によ
れば、１つの熱サイクル内で廃液からの水分の蒸発と蒸
発した水分の凝縮を効率的に行わせることができので、
エネルギー利用効率が高く、少ないエネルギーによって
多量の廃液を高濃度に濃縮することができる。そして、
廃液を高濃度に濃縮することにより、廃液の容積をきわ
めて少なくできる。According to the waste liquid concentration treatment apparatus of the present invention, the evaporation of water from the waste liquid and the condensation of the evaporated water can be efficiently performed in one heat cycle.
Energy use efficiency is high, and a large amount of waste liquid can be concentrated to a high concentration with little energy. And
By concentrating the waste liquid to a high concentration, the volume of the waste liquid can be extremely reduced.
【００３２】また、この廃液濃縮処理装置によれば、凝
縮槽内における蒸気と冷却部との接触面積を大きくで
き、水分の凝縮効率を高めて水分の回収効率を高くでき
る。Further, according to this waste liquid concentrating treatment apparatus, the contact area between the steam and the cooling section in the condensing tank can be increased, and the water condensation efficiency can be increased, and the water collection efficiency can be increased.
【００３３】請求項３に記載の廃液濃縮処理装置によれ
ば、蒸発槽内を減圧することにより蒸発槽内の廃液の沸
点を下げ、水分の蒸発を促進することができるので、低
温蒸発によって廃液を濃縮することができ、廃液が化学
分解して蒸気と共に排出されにくくなる。According to the waste liquid concentration treatment apparatus of the third aspect, the boiling point of the waste liquid in the evaporation tank can be lowered by reducing the pressure in the evaporation tank, and the evaporation of water can be promoted. Can be concentrated, and the waste liquid is chemically decomposed and hardly discharged together with steam.
【００３４】請求項４に記載の廃液濃縮処理装置によれ
ば、熱サイクル装置を利用してあらかじめ廃液を暖めて
おくことができ、蒸発槽で速やかに廃液を温度上昇させ
ることができ、エネルギーを有効利用しつつ廃液濃縮処
理装置の効率を高めることができる。According to the waste liquid concentration treatment apparatus of the fourth aspect, the waste liquid can be preliminarily warmed by using a heat cycle device, the temperature of the waste liquid can be quickly raised in the evaporating tank, and energy can be saved. It is possible to increase the efficiency of the waste liquid concentration treatment device while effectively utilizing it.
【図１】本発明の一実施形態による廃液濃縮処理装置の
構成を示す概略図である。FIG. 1 is a schematic diagram showing a configuration of a waste liquid concentration treatment device according to an embodiment of the present invention.
【図２】同上の廃液処理装置の設置例を示す概略図であ
る。FIG. 2 is a schematic diagram showing an example of installation of the waste liquid treatment apparatus according to the first embodiment.
【図３】同上の廃液濃縮処理装置の凝縮層の構造を示す
断面図である。FIG. 3 is a cross-sectional view showing a structure of a condensed layer of the waste liquid concentration treatment device of the above.
１ 廃液濃縮処理装置 １１ 予備タンク １２ 蒸発槽 １３ 凝縮槽 １５ 熱サイクル装置 ２４ 排気管 ２５ 真空ポンプ ３０ 冷凍機 ３１ 加熱部 ３２ 予備加熱部 ３６ 冷却部 ３７ 冷却部 ３８ 温循環配管 ３９ 冷循環配管 ４２ 多孔質部材 Ａ 廃液 Ｂ 廃液 Ｃ 水 Ｄ 濃厚廃液 DESCRIPTION OF SYMBOLS 1 Waste liquid concentration processing apparatus 11 Reserve tank 12 Evaporation tank 13 Condensing tank 15 Heat cycle device 24 Exhaust pipe 25 Vacuum pump 30 Refrigerator 31 Heating part 32 Preheating part 36 Cooling part 37 Cooling part 38 Heat circulation pipe 39 Cool circulation pipe 42 Porous Material A waste liquid B waste liquid C water D concentrated waste liquid
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−293079（ＪＰ，Ａ) 特開 昭58−64176（ＪＰ，Ａ) 特開 昭57−122902（ＪＰ，Ａ) 特開 平11−114301（ＪＰ，Ａ) 実開 昭55−115303（ＪＰ，Ｕ) 実開 昭58−151404（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 1/04 B01D 5/00 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-293079 (JP, A) JP-A-58-64176 (JP, A) JP-A-57-122902 (JP, A) JP-A-11- 114301 (JP, A) Japanese Utility Model Showa 55-115303 (JP, U) Japanese Utility Model Showa 58-151404 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) C02F 1/04 B01D 5 / 00
Claims (4)
と、 前記蒸発槽で蒸発した水分を含んだ蒸気を回収し、これ
を冷却することによって空気と水分とに分離する凝縮槽
と、 前記蒸発槽内の廃液を加熱する放熱部及び前記凝縮槽内
の蒸気を冷却する冷却部を備えた熱サイクル装置とを備
えた廃液濃縮処理装置において、 前記凝縮槽内に配置された冷却部の下方に、孔が下面か
ら上面へ連通した多孔質材料を配置し、該多孔質部材の
下方に、前記蒸発槽から凝縮槽へ導かれた蒸気の入口を
設け、前記冷却部及び前記多孔質材料を前記凝縮槽内で
水中に浸かるように配置した 廃液濃縮処理装置。An evaporating tank for heating and evaporating the water in the waste liquid; a condensing tank for collecting vapor containing the evaporated water in the evaporating tank and separating it into air and water by cooling it; in water concentrate processing apparatus including a thermal cycling apparatus having a cooling portion for cooling the steam of the heat radiation portion and the condensing tank for heating the waste liquid in the evaporator tank, below the cooling unit disposed in the condensing chamber Whether the hole is on the bottom
A porous material that communicates with the upper surface of the porous member.
Below, the inlet of the steam led from the evaporation tank to the condensation tank
Providing the cooling unit and the porous material in the condensing tank.
Waste liquid concentration treatment equipment arranged to be immersed in water .
凝縮槽の側面におけるオーバーフロー管の接続位置より
も下方に配置したことを特徴とする、請求項１に記載の
廃液濃縮処理装置。 2. The method according to claim 1, wherein the cooling unit and the porous material are
From the connection position of the overflow pipe on the side of the condensation tank
2. The device according to claim 1, wherein
Waste liquid concentration treatment equipment.
請求項１又は２に記載の廃液濃縮処理装置。3. A means for reducing the pressure in the evaporation tank,
The waste liquid concentration treatment device according to claim 1 or 2.
る予備槽を備え、該予備槽にも前記熱サイクル装置の放
熱部を設けたことを特徴とする、請求項１、２又は３に
記載の廃液濃縮処理装置。4. The apparatus according to claim 1, further comprising a spare tank for storing waste liquid to be supplied to the evaporating tank, wherein the spare tank is provided with a heat radiating portion of the heat cycle device. The waste liquid concentration treatment device according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28921099A JP3302956B2 (en) | 1999-10-12 | 1999-10-12 | Waste liquid concentration treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28921099A JP3302956B2 (en) | 1999-10-12 | 1999-10-12 | Waste liquid concentration treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001104940A JP2001104940A (en) | 2001-04-17 |
| JP3302956B2 true JP3302956B2 (en) | 2002-07-15 |
Family
ID=17740215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28921099A Expired - Fee Related JP3302956B2 (en) | 1999-10-12 | 1999-10-12 | Waste liquid concentration treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3302956B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4795991B2 (en) | 2007-02-27 | 2011-10-19 | 三菱重工業株式会社 | CO2 recovery device and solid content extraction method in CO2 recovery device |
| EP2151417A1 (en) * | 2007-05-21 | 2010-02-10 | All China Environment Investments Limited | Wastewater treatment equipment |
| JP6282776B1 (en) * | 2017-12-01 | 2018-02-21 | 株式会社スイレイ | Wastewater treatment facility and wastewater treatment method |
| JP7294653B2 (en) * | 2019-08-20 | 2023-06-20 | 株式会社スイレイ | Wastewater treatment facility and wastewater treatment method |
| JP7398098B2 (en) * | 2019-12-27 | 2023-12-14 | ヤマト科学株式会社 | Concentrator and method of controlling the concentrator |
-
1999
- 1999-10-12 JP JP28921099A patent/JP3302956B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001104940A (en) | 2001-04-17 |
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