JPH1066962A - Sewage treating device - Google Patents
Sewage treating deviceInfo
- Publication number
- JPH1066962A JPH1066962A JP24425796A JP24425796A JPH1066962A JP H1066962 A JPH1066962 A JP H1066962A JP 24425796 A JP24425796 A JP 24425796A JP 24425796 A JP24425796 A JP 24425796A JP H1066962 A JPH1066962 A JP H1066962A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- liquid
- mixing
- pipe
- section
- 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.)
- Pending
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、各種工場や事業
所あるいは家庭等から排出される排水、あるいは池沼等
の汚濁水等の汚水中の微粒子や溶解成分を凝集させて浮
上分離する汚水処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus for aggregating fine particles and dissolved components in wastewater discharged from various factories, offices, homes, etc., or polluted water such as ponds and marshes to float and separate them. About.
【０００２】[0002]
【従来の技術】従来の汚水処理装置は、被処理液と凝集
剤を急速撹拌槽に注入し、プロペラにより凝集剤と被処
理液を均一に混ぜ合わせ、その後フロックを成長させる
ために緩速撹拌槽でプロペラにより緩やかに撹拌し、成
長したフロックを浮上分離するものであった。フロック
の浮上は、被処理液に気泡水製造装置で製造した微細気
泡を含んだ処理液を混合し、浮上分離槽で分離を行って
いた。2. Description of the Related Art In a conventional sewage treatment apparatus, a liquid to be treated and a coagulant are injected into a rapid stirring tank, the coagulant and the liquid to be treated are uniformly mixed with a propeller, and then slowly stirred to grow floc. The floc was gently stirred with a propeller in the tank, and the grown floc was floated and separated. In the floating of the floc, the processing liquid containing the fine bubbles produced by the bubble water producing apparatus is mixed with the liquid to be treated, and separation is performed in the floating separation tank.
【０００３】また、本願出願人により特願平７−６５０
９２号に示したように、汚水である被処理液を送る圧送
装置と、上記被処理液を流す流路の途中に設けた気液の
加圧混合装置を設けたものがある。この汚水処理装置
は、加圧混合装置の出口側に凝集剤を注入する薬剤注入
部を接続し、その下流に管路による薬剤混合部を形成
し、その下流に可変または固定の絞りからなるノズル部
を備え、このノズル部からの管路を浮上分離槽に接続し
た汚水処理装置である。Further, the applicant of the present invention has filed Japanese Patent Application No. 7-650.
As shown in No. 92, there is a type provided with a pressure feeding device for feeding a liquid to be treated as sewage, and a device for pressurizing and mixing gas-liquid provided in a flow path for flowing the liquid to be treated. This sewage treatment apparatus is connected to a drug injection section for injecting a flocculant at the outlet side of the pressure mixing apparatus, forms a drug mixing section by a pipe downstream thereof, and a nozzle comprising a variable or fixed throttle downstream thereof. This is a sewage treatment apparatus provided with a pipe section from the nozzle section and connected to a flotation tank.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の技術の前者
の場合、急速撹拌槽、緩速撹拌層、気泡水製造装置等が
装置全体としてで大きな体積を占め、装置が大がかりな
ものとなっていた。従って、小規模な事業所等での設置
が難しいという問題があった。In the former case of the above-mentioned prior art, a rapid stirring tank, a slow stirring layer, a bubble water producing apparatus, etc. occupy a large volume as a whole apparatus, and the apparatus is large-scale. Was. Therefore, there is a problem that it is difficult to set up a small business establishment.
【０００５】また、上記従来の技術の後者の場合、薬剤
注入部の下流の管路による薬剤混合部において、薬剤を
注入するポンプの脈動のために、被処理液中の薬剤濃度
に濃淡が生じてしまうという問題があった。そしてこの
濃淡のない状態にするには薬剤混合部の長さを長くしな
ければならず、そのための大きなスペースを必要とする
ものであった。[0005] In the latter case of the above-mentioned prior art, the concentration of the drug in the liquid to be treated varies due to the pulsation of a pump for injecting the drug in a drug mixing section formed by a pipe downstream of the drug injection section. There was a problem that would. In order to make the state without shading, the length of the medicine mixing section must be increased, which requires a large space.
【０００６】この発明は、上記従来技術の問題点に鑑み
て成されたもので、簡単な構成であって、小型で効率良
く迅速に汚水中の微粒子等を浮上分離させることができ
る汚水処理装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a simple configuration, and is a small, efficient and quickly sewage treatment apparatus capable of quickly and efficiently floating and separating fine particles and the like in sewage. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】この発明は、事業所や家
庭等から排出される排水等の汚水である被処理液を送る
圧送装置と、上記被処理液と気体とを連続的に加圧下で
混合する気液混合装置を設け、この気液混合装置の出口
側に凝集剤等の薬剤を注入する薬剤注入部を接続し、そ
の下流に薬剤を混合する配管を螺旋状に形成した薬剤混
合部を形成し、その下流に可変または固定の絞りからな
るノズル部を備え、このノズル部からの管路を浮上分離
槽に接続した汚水処理装置である。さらに、上記気液混
合装置は、上記被処理液を流す流路の一部を絞ったベン
チュリ管やオリフィス等の絞り部と、上記絞り部に続い
て下流側に設けられ上記流路方向に断面積の等しい気体
流入部を設け、この気体流入部に外部から気体を流入さ
せる気体流入口を形成し、上記気体流入口の下流側に上
記流路を徐々に広げた広がり部を設け、上記広がり部の
下流に上記流路中の被処理液と上記気体流入口から流入
した気体とを加圧下で混合する加圧混合部を備えたもの
である。SUMMARY OF THE INVENTION The present invention relates to a pressure feeding device for feeding a liquid to be treated, which is waste water such as wastewater discharged from an office or home, and a method for continuously pressurizing the liquid to be treated and gas. A gas-liquid mixing device is provided for mixing, and a drug injection portion for injecting a drug such as a flocculant is connected to the outlet side of the gas-liquid mixing device, and a pipe for mixing the drug is formed helically downstream of the device. This is a sewage treatment apparatus in which a nozzle section comprising a variable or fixed throttle is formed downstream of the section, and a pipeline from the nozzle section is connected to a flotation tank. Further, the gas-liquid mixing device is provided with a throttle section such as a venturi pipe or an orifice in which a part of the flow path for flowing the liquid to be processed is throttled, and is provided downstream downstream of the throttle section and cut in the flow path direction. Providing a gas inlet having an equal area, forming a gas inlet for allowing gas to flow in from the outside to the gas inlet, providing a widening portion that gradually widens the flow path on the downstream side of the gas inlet, A pressurized mixing section is provided downstream of the section for mixing the liquid to be treated in the flow path and the gas flowing from the gas inlet under pressure.
【０００８】また、上記配管を螺旋状に形成した薬剤混
合部は、上記螺旋状の配管の下方に上記薬剤注入部を接
続し、上方に上記ノズル部を接続し、気液混合流が上記
螺旋状の配管を下方から上方に流れるようにしたもので
ある。さらに、上記薬剤混合部は、上記浮上分離槽の周
囲に巻付けられているものである。The medicine mixing section having the pipe formed in a spiral shape connects the drug injection section below the spiral pipe, connects the nozzle section above the spiral pipe, and allows the gas-liquid mixed flow to flow through the spiral. The pipe has a shape like that flows upward from below. Further, the medicine mixing section is wound around the flotation tank.
【０００９】この発明の汚水処理装置は、薬剤注入部か
ら注入された凝集剤等が気液混合した被処理液中に混ぜ
られ、薬剤混合部内の被処理液中で凝集剤濃度の差がな
いように均一化され、その下流のノズル部に送られるも
のである。薬剤混合部内では薬剤が注入された被処理液
が、配管内の流れの乱れと、湾曲した管路の内側と外側
の経路長の違いによる混合により、薬剤が均一に混り合
う。そして、ノズル部で、加圧溶解していた気体が噴射
とともに微細気泡となって被処理液中に析出し、被処理
液中の汚染物質の凝集体であるフロック表面及び内部に
気泡が付着し、この気泡の浮力によりフロックを浮上分
離させるものである。In the sewage treatment apparatus of the present invention, the coagulant or the like injected from the chemical injection section is mixed in the liquid-to-gas mixed liquid to be processed, and there is no difference in the coagulant concentration in the liquid to be processed in the chemical mixing section. And then sent to the downstream nozzle. In the chemical mixing section, the liquid to be treated into which the chemical is injected is mixed uniformly by the turbulence of the flow in the pipe and the mixing due to the difference in the path length between the inside and the outside of the curved pipe. At the nozzle, the gas dissolved under pressure is sprayed and becomes fine bubbles as fine bubbles and precipitates in the liquid to be treated, and bubbles adhere to the surface and inside of the floc, which is an aggregate of contaminants in the liquid to be treated. The flock floats and separates by the buoyancy of the bubbles.
【００１０】[0010]
【発明の実施の形態】以下この発明の汚水処理装置の実
施の形態について図面を基にして説明する。図１〜図３
はこの発明の第一実施形態を示すもので、この実施形態
の汚水処理装置は、図１に示すように、工場排水や家庭
排水その他の排水等の汚水である被処理液２２を溜めた
被処理液槽２０に、管路２１を介して圧送装置である圧
送ポンプ２４が接続されている。圧送ポンプ２４には、
管路２３を経て、気体の吸引器２６が接続されている。
吸引器２６には、気体管路４４を介して、ボンベや気体
ポンプ等の気体供給源４２が接続されている。また、気
体供給源が大気圧下の空気で良い場合は、大気圧下に開
放しても良い。さらに、吸引器２６の下流側には、段階
的に緩急を繰り返し流れ落ちる流路を形成し、被処理液
中に気体を加圧混合する加圧混合部である気液混合槽２
８が設けられている。そして、吸引器２６と混合槽２８
により、被処理液２２に気体を混合する気液混合装置を
構成している。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a sewage treatment apparatus according to the present invention will be described below with reference to the drawings. 1 to 3
FIG. 1 shows a first embodiment of the present invention. As shown in FIG. 1, a sewage treatment apparatus according to this embodiment is a sewage treatment apparatus in which a sewage treatment liquid 22 which is sewage such as factory wastewater, domestic wastewater, or other wastewater is stored. The processing liquid tank 20 is connected via a pipe 21 to a pump 24 serving as a pumping device. In the pump 24,
A gas suction device 26 is connected via a pipe 23.
A gas supply source 42 such as a cylinder or a gas pump is connected to the suction device 26 via a gas pipe 44. If the gas supply source is air at atmospheric pressure, it may be opened to atmospheric pressure. Further, on the downstream side of the suction device 26, a flow path is formed in which the gas flows repeatedly and gradually in a stepwise manner, and the gas-liquid mixing tank 2 is a pressurized mixing section that pressurizes and mixes the gas into the liquid to be treated.
8 are provided. Then, the suction device 26 and the mixing tank 28
Thus, a gas-liquid mixing device that mixes gas with the liquid to be processed 22 is configured.
【００１１】この混合槽２８の下流には、凝集剤等の薬
剤を注入する薬剤注入部３０が設けられている。薬剤注
入部３０には、凝集剤タンク４６に接続された薬剤注入
管路４８の先端部が、図示しない薬注ポンプを介して接
続されている。この薬剤注入部３０の下流側は、薬剤混
合部である混合管路３２に接続され、混合管路３２の下
流側端部が、ノズル部３４に接続されている。この混合
管路３２は、管路内の流れが乱流になるように設定され
ている。この乱流による流れの乱れと、配管を螺旋状に
形成させたために生じる湾曲した管路の内側と外側との
経路長の違いによって、管路内を流れる被処理液２２の
薬剤濃度のばらつきを解消するものである。さらに、混
合管路３２の下方に薬剤注入部３０が接続され、上方に
ノズル部３４が接続され、気液混合流が螺旋状の混合管
路３２の下方から上方に流れるようにしたものである。
なお、これを逆にすると、気液混合流の流入当初、混合
管路３２の上方に気体が滞り、これを排出するまでに多
少の時間がかかる。しかし、上述のように下方から気液
混合流を流すと、気体が管路内にとどまることななく、
使用当初から良好な混合状態が得られるものである。Downstream of the mixing tank 28, there is provided a medicine injecting section 30 for injecting a medicine such as a flocculant. The distal end of a drug injection pipe 48 connected to the coagulant tank 46 is connected to the drug injection section 30 via a drug injection pump (not shown). The downstream side of the medicine injecting section 30 is connected to a mixing pipe 32 which is a medicine mixing section, and the downstream end of the mixing pipe 32 is connected to a nozzle section 34. The mixing line 32 is set so that the flow in the line becomes turbulent. The turbulence of the flow due to the turbulence and the difference in the path length between the inside and the outside of the curved pipe caused by forming the pipe in a spiral form cause the variation in the drug concentration of the liquid to be treated 22 flowing in the pipe. It will be resolved. Further, a medicine injection section 30 is connected below the mixing pipe 32, and a nozzle section 34 is connected above, so that the gas-liquid mixed flow flows upward from below the spiral mixing pipe 32. .
If this is reversed, at the beginning of the inflow of the gas-liquid mixed flow, the gas stays above the mixing line 32, and it takes some time to discharge the gas. However, when the gas-liquid mixed flow is flowed from below as described above, the gas does not stay in the pipeline,
A good mixed state can be obtained from the beginning of use.
【００１２】そして、ノズル部３４の下流側に、凝集用
の助剤注入管路５２が接続された助剤注入部３６が設け
られている。この助剤注入部３６に接続された助剤注入
管路５２は、圧送手段である図示しない薬注ポンプを介
して、助剤タンク５０と接続されている。助剤注入部３
６の下流側には、相対的に太めの管路３７が接続され、
この管路３７の先端部が、浮上分離槽３８の底部に開口
している。また、浮上分離槽３８の上部には、浮上して
きたフロックを回収するスキーマ等の回収装置を取り付
けることが望ましい。An auxiliary injection section 36 to which an auxiliary injection pipe 52 for coagulation is connected is provided downstream of the nozzle section 34. The auxiliary agent injection pipe line 52 connected to the auxiliary agent injection section 36 is connected to the auxiliary agent tank 50 via a chemical injection pump (not shown) which is a pressurizing means. Auxiliary injection part 3
6, a relatively thick pipe 37 is connected to the downstream side,
The distal end of the conduit 37 opens at the bottom of the flotation tank 38. Further, it is desirable to attach a recovery device such as a schema for recovering the floating flocs above the floating separation tank 38.
【００１３】ここで、この実施形態の吸引器２６には、
図２に示すように、絞り部である喉部５８が中央に設け
られたベンチュリ管状の流路５６が形成されている。こ
のベンチュリ管状の流路５６の入口部５４に、管路２３
の先端部が接続され、出口部６４に、混合槽２８が管路
を介して接続される。喉部５８の下流側には、喉部５８
よりわずかに内径が大きい円筒状の気体流入部６０形成
され、この気体流入部６０の下流側には、なめらかにテ
ーパ状に広がった広がり部６２が形成されている。さら
に、気体流入部６０には、気体を流路５６内に導くため
の気体流入口６６が形成されている。ここで、気体流入
部６０の内径が喉部５８よりわずかに大きいのは、気体
が流入しやすいようにするためであり、円筒状に形成さ
れているのは、気体流入を安定させるためである。ま
た、喉部５８から噴出してきた被処理液２２の流れは、
喉部５８を通過の後、コーン状に拡大するため、気体流
入部６０の長さには制限がある。即ち、喉部５８から流
れが所定の角度で広がり、その流れが気体流入部６０の
壁面に当たるまでの長さが最大値である。Here, the suction device 26 of this embodiment includes:
As shown in FIG. 2, a venturi tubular channel 56 having a throat portion 58 as a throttle portion provided at the center is formed. The conduit 23 is provided at the inlet 54 of the venturi tubular flow path 56.
Is connected, and the mixing tank 28 is connected to the outlet 64 via a conduit. Downstream of the throat 58, the throat 58
A cylindrical gas inflow portion 60 having a slightly larger inner diameter is formed, and an expanding portion 62 that smoothly expands in a tapered shape is formed downstream of the gas inflow portion 60. Further, a gas inlet 66 for guiding the gas into the flow channel 56 is formed in the gas inflow portion 60. Here, the reason why the inner diameter of the gas inflow portion 60 is slightly larger than that of the throat portion 58 is to make it easier for gas to flow in, and to be formed in a cylindrical shape to stabilize gas inflow. . In addition, the flow of the liquid to be treated 22 spouted from the throat 58 is
After passing through the throat 58, it expands in a cone shape, so that the length of the gas inflow portion 60 is limited. That is, the length of the flow from the throat 58 at a predetermined angle until the flow hits the wall surface of the gas inflow portion 60 is the maximum value.
【００１４】また、気液混合槽２８は、箱型に組まれて
内部の流路が、水平部と垂直部とが交互に段階的に設け
られ、段階的に緩急を繰り返し流れ落ちる流路となって
いる。そしてこの流路に被処理液２２の気液混合流を流
すと、流路内で高効率な気体溶解が行われる。The gas-liquid mixing tank 28 is formed in a box shape, and the internal flow passage is provided with a horizontal portion and a vertical portion alternately in a stepwise manner, and serves as a flow passage that flows repeatedly and gradually in a stepwise manner. ing. When a gas-liquid mixed flow of the liquid to be treated 22 is caused to flow through this flow path, highly efficient gas dissolution is performed in the flow path.
【００１５】この実施形態の汚水処理装置は、被処理液
２２が、圧送ポンプ２４で汲み上げられ、管路２３を経
て吸引器２６に圧送される。そして、吸引器２６の入口
部５４に流入した被処理液２２は、喉部５８で加速され
て、一旦静圧が低くなり気体流入部６０、広がり部６２
を経て減速し再び静圧が上昇する。この時、気体流入部
６０に設けられた気体流入口６６は、喉部５８の下流で
あり、この部分の静圧も十分低い状態になっていて、こ
の気体流入口６６から気体が気体流入部６０内に流入す
る。In the sewage treatment apparatus of this embodiment, the liquid to be treated 22 is pumped up by a pressure feed pump 24 and fed to a suction device 26 through a pipe 23. Then, the liquid to be treated 22 flowing into the inlet portion 54 of the suction device 26 is accelerated by the throat portion 58, and once the static pressure is reduced, the gas inflow portion 60 and the expanding portion 62
After that, the pressure decreases and the static pressure increases again. At this time, the gas inlet 66 provided in the gas inlet 60 is located downstream of the throat 58, and the static pressure in this portion is also sufficiently low. It flows into 60.
【００１６】気体流入口６６から流入した気体は、気泡
となって流路５６中を被処理液２２とともに混合槽２８
に流れ、混合槽２８の静圧も十分に高い状態となってい
るので、ここで気体が被処理液２２に溶解していく。そ
して、気体の溶解した被処理液２２は、薬剤注入部３０
で凝集剤と混合され、混合管路３２の流れの乱れと、湾
曲した管路の内側と外側の経路長の違いによる混合によ
り、凝集剤と被処理液２２が均一にまざり合う。この混
合管路３２の長さは凝集剤と被処理液が均一に混じり合
うための十分な時間が得られれば良い。ここで、混合管
路３２内で凝集剤の濃度差が生じるのは、薬注ポンプに
は脈動があり、被処理液２２中に注入される凝集剤の量
が時間的に変動するためである。The gas flowing in from the gas inlet 66 becomes bubbles and flows in the flow path 56 together with the liquid to be treated 22 in the mixing tank 28.
And the static pressure of the mixing tank 28 is also sufficiently high, so that the gas is dissolved in the liquid 22 to be treated. Then, the liquid to be treated 22 in which the gas is dissolved is supplied to the chemical injection section 30.
The flocculant is mixed with the coagulant by the turbulence of the flow in the mixing conduit 32 and the mixing due to the difference in path length between the inside and the outside of the curved conduit. The length of the mixing conduit 32 may be any length as long as a sufficient time for uniformly mixing the coagulant and the liquid to be treated is obtained. Here, the difference in the concentration of the coagulant in the mixing conduit 32 is caused by the pulsation of the chemical injection pump, and the amount of the coagulant injected into the liquid to be treated 22 fluctuates with time. .
【００１７】薬剤注入部３０から注入された凝集剤は、
気液混合した被処理液２２中に混合される。薬剤混合部
である混合管路３２内では、螺旋状の管路を通過するう
ちに、その管路の内外位置での流路長の差により、流れ
が混合され、被処理液２２中での凝集剤濃度差がないよ
うに均一化され、その下流のノズル部３４に送られる。The coagulant injected from the drug injection section 30 is
It is mixed into the gas-liquid mixed liquid 22 to be treated. In the mixing pipe 32, which is a chemical mixing section, the flow is mixed due to the difference in the flow path length between the inside and outside of the pipe while passing through the spiral pipe, and the flow in the liquid to be treated 22 is The coagulant is made uniform so that there is no difference in the coagulant concentration, and is sent to the nozzle section 34 downstream thereof.
【００１８】実験的には、図３に示すように、管内径が
１５ｍｍ、螺旋の直径が０．３ｍの場合、２．３ｍ以上
の管路長で、薬剤の良好な混合状態が得られた。これに
対して、直線状に混合管路３２を形成すると、４ｍ以下
の管路では十分な薬剤の混合状態が得られず、浮上分離
が良好になされないという結果が得られた。ここで、混
合管路３２内での流れのレイノルズ数は、乱流領域であ
る２３００以上であれば良い。Experimentally, as shown in FIG. 3, when the inner diameter of the pipe is 15 mm and the diameter of the spiral is 0.3 m, a good mixing state of the drug is obtained with a pipe length of 2.3 m or more. . On the other hand, when the mixing conduit 32 was formed linearly, a sufficient mixing state of the medicine could not be obtained with a conduit of 4 m or less, and the result that floating separation was not satisfactory was obtained. Here, the Reynolds number of the flow in the mixing pipe 32 may be 2300 or more, which is a turbulent flow region.
【００１９】混合管路３２から出た被処理液２２の気液
混合流は、ノズル部３４を通過する際に再び加速される
ので、その静圧が低くなり、液体中に加圧溶解していた
気体が、気泡径が数μｍから数十μｍの微細気泡として
析出する。尚、ノズル部３４はバルブ等の可変の絞りで
も、単数または複数のノズル孔からなる固定の絞りでも
良い。ノズル部３４から出た被処理液２２は、凝集助剤
注入部３６で助剤が注入され、その後浮上分離槽３８に
流入する。The gas-liquid mixed flow of the liquid to be treated 22 that has flowed out of the mixing pipe 32 is accelerated again when passing through the nozzle portion 34, so that its static pressure is reduced and it is dissolved under pressure in the liquid. The deposited gas precipitates as fine bubbles having a bubble diameter of several μm to several tens μm. The nozzle section 34 may be a variable aperture such as a valve or a fixed aperture having a single or a plurality of nozzle holes. The liquid to be treated 22 that has exited from the nozzle part 34 is injected with an auxiliary agent in the coagulation auxiliary agent injection part 36 and then flows into the flotation tank 38.
【００２０】浮上分離槽３８では、凝集剤が被処理液中
の汚れ成分を凝集させフロックを形成する。そして、こ
のフロックは、液中に生じている微細気泡によって浮上
させられ、被処理液２２中の汚染物質の浮上分離が行わ
れる。浮上分離槽３８につながる管路３７は、フロック
を効率よく形成させるために、相対的に太めの内径のも
のを選択し、０．２ｍ／ｓ以下のゆっくりとした流速で
浮上分離槽３８内に被処理液２２を放出することが望ま
しい。また浮上分離槽３８もフロックをもれなく浮上さ
せるために、滞留時間１０分以上、被処理液２２の放出
箇所隔壁３８ａの高さが０．７ｍ以上であることが望ま
しい。In the flotation tank 38, the flocculant aggregates the dirt components in the liquid to be treated to form flocs. Then, the flocs are caused to float by fine bubbles generated in the liquid, and the floating substances are separated from the contaminants in the liquid 22 to be treated. The pipe line 37 connected to the flotation tank 38 is selected to have a relatively large inner diameter in order to form flocs efficiently, and is introduced into the flotation tank 38 at a slow flow rate of 0.2 m / s or less. It is desirable to discharge the liquid 22 to be treated. In addition, in order to float the flotation tank 38 without any flock, it is desirable that the residence time is 10 minutes or more, and the height of the partition wall 38a where the liquid 22 to be treated is discharged is 0.7 m or more.
【００２１】なお、この実施形態において、助剤注入部
３６をノズル部３４と浮上分離槽３８の間に設けたが、
混合管路３２とノズル部３４の間に設けても良い。ま
た、この実施形態では助剤注入部３６を１箇所だけ設け
たが、複数種類の助剤を用いる場合においては、複数の
助剤注入部３６を設けてもよい。In this embodiment, the auxiliary agent injection section 36 is provided between the nozzle section 34 and the flotation tank 38.
It may be provided between the mixing pipe 32 and the nozzle section 34. In this embodiment, only one auxiliary injection part 36 is provided. However, when a plurality of types of auxiliary are used, a plurality of auxiliary injection parts 36 may be provided.
【００２２】この実施形態の汚水処理装置では、吸引器
２６の気体流入部６０と、ノズル部３４のノズル孔の各
々の断面積の関係は以下の式を満たすものであれば良
い。 ＰＡ 1＜ＰＧ （１） ＰＡ1＝（１−ＳＣ2／ＳＢ2 1）Ｐ1＋（δＰ＋ＰＢ）ＳＣ2 ／ＳＢ2 1 （２） ここで、ＰＧは気体供給源４２から流入する気体の圧
力、ＰＡ1は流体力学上のベルヌーイの定理と連続の式
から、上記式（２）により与えられる気体流入部６０の
静圧である。ＳＢ1は気体流入部６０の断面積、ＳＣは
ノズル部３４のノズル孔の断面積の総和、Ｐ1は気体流
入部６０の総圧、δＰは気体流入部６０からノズル部３
４までの圧力損失、ＰＢはノズル部３４の出口の静圧で
ある。In the sewage treatment apparatus of this embodiment, the suction device
26 and the nozzle holes of the nozzle portion 34
The relationship between the various cross-sectional areas is good as long as the following formula is satisfied.
No. PA 1<PG (1) PA1= (1-SCTwo/ SBTwo 1) P1+ (ΔP + PB) SCTwo / SBTwo 1 (2) Here, PG is the pressure of the gas flowing from the gas supply source 42.
Power, PA1Is Bernoulli's theorem on fluid dynamics and the continuity equation
From the above, the gas inflow portion 60 given by the above equation (2)
Static pressure. SB1Is the cross-sectional area of the gas inlet 60, SC is
The sum of the cross-sectional areas of the nozzle holes of the nozzle portion 34, P1Is the gas flow
The total pressure of the inlet 60, δP, is from the gas inlet 60 to the nozzle 3
The pressure loss up to 4, PB is the static pressure at the outlet of the nozzle part 34
is there.
【００２３】この実施形態の汚水処理装置によれば、被
処理液２２を連続的に処理することができ、しかも、比
較的短くスペースをとらない螺旋状の混合管路３２で凝
集剤等の薬剤が均一に混合され、大きな装置必要とせず
全体的に小さいものにすることができる。According to the sewage treatment apparatus of this embodiment, the liquid to be treated 22 can be continuously treated, and a chemical mixture such as a flocculant is formed in the spiral mixing pipe 32 which is relatively short and does not take up much space. Are uniformly mixed and can be made smaller overall without the need for large equipment.
【００２４】次にこの発明の第二実施形態について図４
を基にして説明する。ここで、上述の実施形態と同様の
部材は同一符号を付して説明を省略する。この実施形態
は、混合管路３２を矩形に螺旋状に形成したものであ
る。この場合、実験的には、管内径が１５ｍｍ、矩形の
一辺の長さが０．３ｍの場合、４ｍで４段以上の管路長
で、薬剤の良好な混合状態が得られ、浮上分離も良好な
結果が得られた。Next, a second embodiment of the present invention will be described with reference to FIG.
The description will be made based on FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the mixing conduit 32 is formed in a rectangular spiral shape. In this case, experimentally, when the inner diameter of the tube is 15 mm and the length of one side of the rectangle is 0.3 m, a good mixing state of the drug can be obtained with 4 m or more of 4 or more pipe lengths, and the floating separation is also possible. Good results were obtained.
【００２５】次にこの発明の第三実施形態について図５
を基にして説明する。ここで、上述の実施形態と同様の
部材は同一符号を付して説明を省略する。この実施形態
は、薬剤混合部の混合管路３２を、浮上分離槽３８の周
囲に螺旋状に巻付けたものである。これにより、混合管
路３２に要するスペースを大幅に削減することができ、
より小型の装置を形成することができる。なお、浮上分
離槽３８は円筒状の他、矩形のものでもよく、矩形の場
合上記第二実施形態のように混合管路３２の配管を巻付
けると良い。Next, a third embodiment of the present invention will be described with reference to FIG.
The description will be made based on FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the mixing conduit 32 of the medicine mixing section is spirally wound around a flotation tank 38. As a result, the space required for the mixing line 32 can be significantly reduced,
A smaller device can be formed. The flotation tank 38 may have a rectangular shape in addition to a cylindrical shape. In the case of a rectangular shape, the pipe of the mixing pipe 32 may be wound as in the second embodiment.
【００２６】尚、この発明の汚水処理装置の薬剤混合部
は、流路が螺旋状に形成されたものであればよく、その
螺旋の形状は問わないものである。また、吸引器は、ベ
ンチュリ管状の他、絞り部をオリフィス状に急激に絞っ
たものでも良く、絞り部等の形状は問わないものであ
る。さらに、ノズル部の形状やノズル孔の数も上述の所
定の条件に一致させて適宜設定できるものであり、流路
が絞ってあるものであれば良い。また、吸引器の絞り部
が形成された流路は、１又は複数の流路であっても良
く、その形態や数は問わない。また、この装置の気体供
給源をオゾン発生装置等に接続すると、加圧溶解による
気泡の生成と同時に、オゾン処理等の気液反応による処
理を同時に行うことができる。The chemical mixing section of the sewage treatment apparatus of the present invention may have any shape as long as the flow path is formed in a spiral shape, and the shape of the spiral is not limited. In addition to the venturi tube, the suction device may be a device in which the throttle portion is rapidly narrowed in an orifice shape, and the shape of the throttle portion or the like is not limited. Further, the shape of the nozzle portion and the number of nozzle holes can also be appropriately set in accordance with the above-mentioned predetermined conditions, and may be any as long as the flow path is narrowed. Further, the flow path in which the throttle portion of the suction device is formed may be one or more flow paths, and the form and number thereof are not limited. Further, when the gas supply source of this device is connected to an ozone generator or the like, it is possible to simultaneously perform the process of gas-liquid reaction such as the ozone treatment, as well as the generation of bubbles by the pressurized dissolution.
【００２７】[0027]
【発明の効果】この発明の汚水処理装置は、薬剤混合部
を螺旋状の配管で形成することにより、装置の小型化に
寄与し、且つ効率よい混合を行なうことができるもので
ある。そして、工場排水や家庭排水その他の排水等の汚
水である被処理液中に、効率よく薬剤を混合することが
でき、汚水中の汚染物質である微粒子等を凝集させて迅
速に分離させることができるものである。さらに、凝集
剤の混合を、連続的に効率よく行うことができ、少ない
エネルギーで多くの汚水処理が可能となるものである。According to the sewage treatment apparatus of the present invention, by forming the chemical mixing section with a spiral pipe, it is possible to contribute to downsizing of the apparatus and perform efficient mixing. In addition, the chemical can be efficiently mixed into the liquid to be treated, which is wastewater such as industrial wastewater or domestic wastewater, and the like. You can do it. Furthermore, the coagulant can be continuously and efficiently mixed, and a large amount of wastewater can be treated with a small amount of energy.
【図１】この発明の第一実施形態の汚水処理装置を示す
概略図である。FIG. 1 is a schematic diagram showing a sewage treatment apparatus according to a first embodiment of the present invention.
【図２】この発明の第一実施形態の汚水処理装置の吸引
器の正面図（Ａ）と縦断面図（Ｂ）である。FIG. 2 is a front view (A) and a longitudinal sectional view (B) of a suction device of the sewage treatment apparatus according to the first embodiment of the present invention.
【図３】この発明の第一実施形態の汚水処理装置の薬剤
混合部の平面図（Ａ）と正面図（Ｂ）である。FIG. 3 is a plan view (A) and a front view (B) of a chemical mixing section of the sewage treatment apparatus according to the first embodiment of the present invention.
【図４】この発明の第二実施形態の汚水処理装置の薬剤
混合部の平面図（Ａ）と正面図（Ｂ）である。FIG. 4 is a plan view (A) and a front view (B) of a chemical mixing section of a sewage treatment apparatus according to a second embodiment of the present invention.
【図５】この発明の第三実施形態の汚水処理装置の薬剤
混合部の平面図（Ａ）と正面図（Ｂ）である。FIG. 5 is a plan view (A) and a front view (B) of a chemical mixing section of a sewage treatment apparatus according to a third embodiment of the present invention.
２２ 被処理液 ２４ ポンプ（圧送装置） ２６ 吸引器（気液混合装置） ２８ 混合槽（気液混合装置） ３０ 薬剤注入部 ３２ 混合管路（薬剤混合部） ３４ ノズル部 ３８ 浮上分離槽 Reference Signs List 22 Liquid to be treated 24 Pump (pressure feeding device) 26 Suction device (gas-liquid mixing device) 28 Mixing tank (gas-liquid mixing device) 30 Drug injection section 32 Mixing pipeline (drug mixing section) 34 Nozzle section 38 Floating separation tank
Claims (5)
薬剤注入部を接続し、その下流に、上記薬剤を混合する
配管を螺旋状に形成した薬剤混合部を設けた汚水処理装
置。1. A sewage treatment apparatus in which a drug injection section for injecting a drug is connected to a pipeline through which a liquid to be treated flows, and a drug mixing section in which a pipe for mixing the drug is formed in a spiral shape is provided downstream of the pipe.
上記被処理液と気体とを連続的に加圧下で混合する気液
混合装置を設け、この気液混合装置の出口側に薬剤を注
入する薬剤注入部を接続し、その下流に薬剤を混合する
配管を螺旋状に形成した薬剤混合部を設け、その下流に
可変または固定の絞りからなるノズル部を設け、このノ
ズル部からの管路を浮上分離槽に接続した汚水処理装
置。2. A pressure feeding device for feeding a liquid to be treated, which is sewage,
A gas-liquid mixing device for continuously mixing the liquid to be treated and the gas under pressure is provided, and a drug injection section for injecting a drug is connected to an outlet side of the gas-liquid mixing device, and the drug is mixed downstream thereof. A sewage treatment apparatus in which a chemical mixing section having a pipe formed in a spiral shape is provided, a nozzle section including a variable or fixed throttle is provided downstream thereof, and a pipe from the nozzle section is connected to a flotation tank.
す流路の一部を絞った絞り部と、上記絞り部に続いて下
流側に設けられ上記流路方向に断面積の等しい気体流入
部を設け、この気体流入部に外部から気体を流入させる
気体流入口を形成し、上記気体流入口の下流側に上記流
路を徐々に広げた広がり部を設け、上記広がり部の下流
に上記流路中の被処理液と上記気体流入口から流入した
気体とを加圧下で混合する加圧混合部を備えた請求項２
記載の汚水処理装置。3. The gas-liquid mixing device according to claim 1, further comprising: a throttle portion that narrows a part of a flow path through which the liquid to be treated flows, and a downstream portion provided downstream of the throttle portion and having an equal cross-sectional area in the flow channel direction. A gas inflow portion is provided, a gas inflow port for inflowing gas from the outside into the gas inflow portion is formed, and a divergent portion in which the flow path is gradually expanded downstream of the gas inflow portion is provided, and a downstream portion of the divergent portion is provided. 3. A pressure mixing section for mixing the liquid to be treated in the flow path and the gas flowing from the gas inlet under pressure.
A sewage treatment apparatus as described in the above.
は、上記螺旋状の配管の下方に上記薬剤注入部を接続
し、上方に上記ノズル部を接続し、気液混合流が上記螺
旋状の配管を下方から上方に流れるようにした請求項２
又は３記載の汚水処理装置。4. A medicine mixing section in which the pipe is formed in a spiral shape, wherein the medicine injecting section is connected below the spiral pipe, and the nozzle section is connected above the spiral pipe, and the gas-liquid mixture flows through the spiral. 2. A pipe having a shape like a pipe flowing from below to above.
Or the sewage treatment apparatus according to 3.
囲に巻付けられている請求項２，３又は４記載の汚水処
理装置。5. The sewage treatment apparatus according to claim 2, wherein the chemical mixing section is wound around the flotation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24425796A JPH1066962A (en) | 1996-08-26 | 1996-08-26 | Sewage treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24425796A JPH1066962A (en) | 1996-08-26 | 1996-08-26 | Sewage treating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1066962A true JPH1066962A (en) | 1998-03-10 |
Family
ID=17116071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24425796A Pending JPH1066962A (en) | 1996-08-26 | 1996-08-26 | Sewage treating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1066962A (en) |
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