KR100301292B1 - A sewage and / or wastewater treatment method, and an equipment thereof - Google Patents

A sewage and / or wastewater treatment method, and an equipment thereof Download PDF

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KR100301292B1
KR100301292B1 KR1019990023355A KR19990023355A KR100301292B1 KR 100301292 B1 KR100301292 B1 KR 100301292B1 KR 1019990023355 A KR1019990023355 A KR 1019990023355A KR 19990023355 A KR19990023355 A KR 19990023355A KR 100301292 B1 KR100301292 B1 KR 100301292B1
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air
air supply
supply chamber
impeller
pipe
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KR1019990023355A
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Korean (ko)
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KR19990068797A (en
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이세진
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이세진
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Water Treatments (AREA)

Abstract

PURPOSE: An air floatation apparatus for physical treatment of wastewater is provided, which is effective for removing solid particles heavier than water. CONSTITUTION: An air supply chamber(2) is installed between an inlet of a dissolved air floatation tank and an outlet of a wastewater stirring tank(4) in series. A support tube(21) is installed at the upper part of the air supply chamber(2), and an inverter motor(23) is equipped at the upper part of the support tube so that a drive shaft(24) rotates inside the support tube. A plurality of air holes(26) is formed on the upper circumferential part of the support tube, and an impeller(3) is installed at the bottom end of an air suction pipe(25) which is installed to insert to the center part of the air supply chamber. A plurality of air emission tubes(31) is protruded at the impeller, and plural blades(32) are formed between the air emission tubes. Also, a chemical injection pipe is connected to an inlet of air supply chamber(2).

Description

오.폐수의 처리방법 및 그 장치{A sewage and / or wastewater treatment method, and an equipment thereof}A sewage and / or wastewater treatment method, and an equipment

본 발명은 오·폐수의 처리방법 및 그 장치에 관한 것으로 보다 구체적인 것은 오·폐수 속에 혼합되어 있는 고형물에 아주 작은 공기방울을 많이 부착시켜서 고형물과 공기방울의 합한 부력이 고형물을 물위로 부상시켜 오·폐수에 혼합된 고형물을 분리하는 오·폐수 처리방법이며 이방법을 효과적으로 달성시킬수 있게 공기공급장치를 설치하여 효과적인 오·폐수처리를 달성하는 것이다.The present invention relates to a method for treating wastewater and its apparatus, and more specifically, to attaching very small air bubbles to solids mixed in wastewater, so that the combined buoyancy of solids and air bubbles floats the solids onto the water. · Wastewater treatment method to separate solids mixed in wastewater, and to achieve effective wastewater treatment by installing an air supply system to achieve this method effectively.

부상분리는 오·폐수 속에 있는 고형물을 분리하기 위한 하나의 수단이고 구체적으로는 미세한 공기방울을 오·폐수 속에 넣어서 교반하므로서 공기방울이 고형물에 부착하여 고형물과 공기방울의 합한 부력이 고형물을 물 위로 떠오르게 하여 오·폐수와 고형물을 분리시키는 방법인데 이러한 방법은 액체보다 밀도가 무거운 입자도 뜨게할수 있는 효과가 있으며 또한 액체보다 밀도가 가벼운 입자도 신속하게 떠오르게 할수가 있다.Flotation separation is a means to separate the solids in the wastewater, and specifically, by adding fine air bubbles into the wastewater and stirring them, the air bubbles adhere to the solids so that the combined buoyancy of the solids and the air bubbles floats on the water. This method separates the waste water and the solids. This method can float particles that are heavier than liquid, and can also quickly float particles that are lighter than liquid.

따라서 오·폐수의 처리에 있어서의 부상분리법은 공기를 부상촉진제로 사용하는 모든 수단을 지칭하는 것이며 그 방법을 살펴보면Therefore, the flotation method in the treatment of wastewater refers to all means of using air as a flotation accelerator.

1. 액체가 압력을 가진 상태에서 공기를 주입한후 압력을 제거하는 방법(용존공기부상분리법)1. Method of removing pressure after injecting air with liquid in pressure (dissolved air flotation)

2. 대기입하에서 포기하는 방법(공기부상분리법)2. Abandonment at atmospheric load (air flotation method)

3. 대기입하에서 공기로 포화시킨후 액체를 진공상태로 만드는 방법(진공부상분리법)으로 구분될수 있고3. It can be divided into the method of making the liquid into a vacuum state after saturating with air at the air inlet (vacuum flotation method).

상기에서 알려져 있는 용존공기부상분리법은 3-8기압하에서 공기를 오·폐수 등에 용존시킨후 다시 압력을 대기압까지 감소시킨 전체 유량을 펌프로 3-8Kg/cm2까지 압력을 받고있는 가압탱크 속에서 5-7분간 체류하는 동안에 공기가 오·폐수 속으로 녹아 들어가게 하여 압력을 받고 있는 유량은 감압밸브를 통하여 부상조로 들어가서 전체액체로부터 공기가 미세한 방울로 되어 빠져 나오게 하는 것이라 이러한 방법은 가압펌프, 가압탱크, 압축기, 압력조절장치, 가압밸브와 같은 위험요소가 많은 기계와 기구를 사용해야하는 부담이 있고 또 상기 기계나 기구들은 그 구조가 복잡하여 설비와 관리에 상당한 기술이 있어야 하는 문제점을 가지고 있으며 일단 가라앉은 부유물에는 공기방울을 다시 부착시킬수가 없게되는 등의 결점이 있었다.In the above-mentioned dissolved air flotation method, a total flow rate in which air is dissolved in wastewater and wastewater under 3-8 atm and then the pressure is reduced to atmospheric pressure is pumped in a pressurized tank that is pressurized to 3-8 kg / cm 2 . The flow rate under pressure by allowing the air to melt into the wastewater for 5-7 minutes is to enter the flotation tank through the pressure reducing valve, and the air flows out of the entire liquid as fine droplets. There is a burden of using high-risk machines and instruments such as tanks, compressors, pressure regulators, and pressure valves, and these machines and mechanisms have a complicated structure and require a considerable amount of technology in equipment and management. The sunken float had the drawback of being unable to reattach air bubbles.

본 발명은 이러한 종래의 결점을 시정하여 복잡하고 위험한 기계나 기구를 사용하지 않고 매우 간편하게 그리고 안정된 방법으로 오·폐수 속에 공기를 공급하여 고형물에 부착시켜 분리시키는 것인즉 이를 보다 상세히 설명하면 다음과 같다.The present invention is to correct these conventional drawbacks to supply air to the waste water in a very convenient and stable way without using complicated and dangerous machinery or apparatus to attach to the solids and to separate it as follows. .

도 1은 본 발명의 공기공급장치 단면도1 is a cross-sectional view of the air supply device of the present invention

도 2, 도 3, 도 4는 본 발명의 공기공급장치에 사용되는 임펠러 예시도2, 3, 4 is an exemplary view of the impeller used in the air supply device of the present invention

도 5는 본 발명의 실시상태도5 is an embodiment of the present invention

도 6은 종래의 부상분리조(DAF) 구성을 설명하는 예시도이다.6 is an exemplary view for explaining a conventional floating separation tank (DAF) configuration.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 부상분리조 101 : 부상분리조측 유입구1: floating separation tank 101: floating separation tank side inlet

2 : 공기공급챔버 20 : 공기공급장치2: air supply chamber 20: air supply device

201 : 공기공급챔버측 유입구 21 : 지지관201: air supply chamber side inlet 21: support pipe

21a : 공기유입구 22 : 베어링21a: air inlet 22: bearing

23 : 가변구동모터(인버터형모터) 24 : 회전축23: variable drive motor (inverter type motor) 24: rotating shaft

25 : 공기흡인관 26 : 흡기공25: air suction pipe 26: intake hole

3 : 임펠러 31 : 배기관3: impeller 31: exhaust pipe

32 : 날개 4 : 교반저장조32: wing 4: stirring reservoir

5 : 공급장치관 8 : 스키머장치5: supply pipe 8: skimmer

10 : 바닥슬러지 수집기10: Bottom Sludge Collector

본 발명은 오·폐수 속의 고형물이나 액체 입자에 매우 자연스러운 방법으로 미세한 공기입자를 부착시켜 수면 위로 떠오르게 하는 부상분리방법이고 본 발명에사용되는 공기공급장치(20)는 공기공급챔버(2)의 상단부에 설치되는 지지관에 임펠러(3)가 달린 공기흡인관을 장치하여 공기흡인관을 가변구동모터로 회전시키는 장치에 의하여 이루어지는 것이 특징이다.The present invention is a floating separation method that floats on the surface by attaching fine air particles to the solids or liquid particles in the waste water in a very natural way, and the air supply device 20 used in the present invention is the upper end of the air supply chamber (2) It is characterized in that the device is made by a device for rotating the air suction pipe with a variable drive motor by installing an air suction pipe with an impeller (3) installed in the support pipe.

즉, 본 발명에 사용되는 공기공급장치(20)는 부상분리조(1)의 오·폐수 유입구(101)에 공기공급챔버(2)를 설치하여 그 상단부에 지지관(21)을 세우고 그 상부에 가변구동모터(23)를 장치하여 가변구동모터의 회전축(24)을 지지관(21) 속으로 넣어서 지지관(21)의 상하에서 베어링(22)에 지지되어 회전하도록 장치되어 있는 공기흡인관(25)의 상단과 접속시키고 접촉부의 상단부 둘레를 따라 다수의 흡기공(26)을 천공하며 이 흡기공은 지지관에 뚫어진 공기유입구(21a)와 연통하게 구성하여 이루어지고 공기흡인관(25)은 내경이 밴튜리관 형상 또는 직선관 형상으로 구성하여 하단을 공기공급챔버(2) 속 중앙까지 삽입하여 그끝에 임펠러(3)를 부착시켜 구성되고 임펠러(3)는 그 둘레에 2-15개의 배기관(31)을 공기흡인관과 연통되게 형성하여 임펠러 둘레에 형성된 배기관(31)의 회전방향쪽 표면에 칼날형상으로된 날개(32)를 부착하는 구성으로 이루어진다.That is, in the air supply device 20 used in the present invention, the air supply chamber 2 is installed at the waste water inlet 101 of the floating separation tank 1 to erect the support pipe 21 at the upper end thereof, and The air suction pipe is installed so that the variable drive motor 23 is installed in the rotary shaft 24 of the variable drive motor into the support tube 21 to be supported by the bearing 22 and rotated above and below the support tube 21. 25) and the plurality of intake holes 26 are drilled along the upper circumference of the contact portion, and the intake holes are formed in communication with the air inlet 21a drilled in the support pipe, and the air suction pipe 25 has an inner diameter. It is composed of a Banturie tube shape or a straight tube shape, the lower end of which is inserted into the center of the air supply chamber 2, and the impeller 3 is attached to the end thereof, and the impeller 3 has 2-15 exhaust pipes 31 around it. ) Is formed in communication with the air suction pipe to exhaust the exhaust formed around the impeller It comprises a configuration for attaching the blade 32 in a blade shape to the rotational direction of the side surface (31).

따라서 본 발명의 공기공급챔버(2) 그 유입구(201)에 오·폐수 교반저장조(4)의 배출관을 접속시키고 유입구(201)에 고분자 응집제 공급장치관을 연결하므로서 오·폐수처리장치가 완성되는 것이다.Therefore, the waste water treatment apparatus is completed by connecting the discharge pipe of the waste water agitation storage tank 4 to the inlet 201 of the air supply chamber 2 of the present invention and connecting the polymer flocculant supply device tube to the inlet 201. will be.

이와같이된 본 발명은 첨부도면 도 5에서 예시한 바와같이 오·폐수 교반저장조(4)와 부상분리조(1) 사이에 공기공급챔버(2)가 장치되어 그 상단에 공기공급장치(20)가 설치되고 오·폐수 교반저장조(4)에 가성소다와 황산반토 등 약품이 투입되어 오·폐수를 약품과 혼합하여 반응시킨후 공기공급챔버(2)를 거쳐 부상분리조(1)로 보내게 되며 공기공급챔버(2)에는 가변구동모터(23)에 의하여 회전속도가 가변되는 공기흡인관(25)이 장치되어 그 하단이 공기공급챔버(2) 속으로 삽입되어 하단에 임펠러(3)가 장치되어 있고, 임펠러가 회전하면 외부의 공기를 자연스럽게 공기공급챔버로 흡인하게 되며 흡인된 공기는 임펠러(3)를 거치면서 미세한 입자로 만들어지고 배기관(31)의 표면에 부착된 날개(32)와 부딪혀서 더욱 미분화되어 공기공급챔버 내의 고형물 표면에 부착되는 작용이 일어나게 된다.In the present invention as described above, the air supply chamber 2 is installed between the waste water agitating reservoir 4 and the floating separation tank 1, as illustrated in FIG. Chemicals such as caustic soda and alumina sulfate are added to the waste / stirrer storage tank (4), and the waste / water is mixed with the chemicals and reacted, and then sent to the floating separation tank (1) through the air supply chamber (2). The air supply chamber (2) is equipped with an air suction pipe (25) whose rotational speed is variable by the variable drive motor (23), the lower end of which is inserted into the air supply chamber (2), and the impeller (3) is installed at the lower end. When the impeller rotates, the outside air is naturally drawn into the air supply chamber, and the sucked air is made of fine particles while passing through the impeller (3) and collides with the wing (32) attached to the surface of the exhaust pipe (31). Micronized Surface of Solids in Air Supply Chamber It is attached to the action.

이는 공기흡인관이 벤튜리관형태로 되어서 회전을 하면 임펠러 주위가 감압되므로 외부의 공기가 흡인관으로 자연스럽게 흡인되는 현상에 기인하고(벤튜리관 형태가 아닌 직선관 형태로 되어도 비슷한 현상이 일어나게 된다) 공기흡인관의 회전수에 비례하여 공기량이 많이 유입되며 임펠러의 교반작용으로 공기의 혼합을 촉진시키는 현상이 일어난다.This is due to the phenomenon that the air around the impeller is depressurized when the air suction tube is in the form of a venturi tube, so that the outside air is naturally sucked into the suction tube (similar phenomenon occurs even when a straight tube is formed instead of the venturi tube). A large amount of air flows in proportion to the rotational speed, and the phenomenon of promoting the mixing of air occurs by stirring the impeller.

따라서 공기흡인관의 회전속도를 적절한 속도로 설정함에 따라 적절한 량의 공기가 유입되어 고형물에 부착될수 있는 것이며 공기공급챔버(2)의 유입구(201) 측에서 고분자 응집제를 공급장치관(5)으로 투입할수 있어서 응집제와 공기를 동시에 교반시켜 고형물에 공급할수 있기 때문에 그 효과를 더욱 확대시킬수 있게된다.Therefore, by setting the rotational speed of the air suction pipe to an appropriate speed, an appropriate amount of air can be introduced and attached to the solid material. The polymer coagulant is introduced into the supply device pipe 5 at the inlet 201 side of the air supply chamber 2. Since the coagulant and the air can be agitated at the same time to supply the solids, the effect can be further expanded.

따라서, 미세한 공기가 고형물의 표면에 부착되어 부상분리조(1)에 유입되면 부력에 의하여 부상분리조의 물위로 떠올라 스키머장치(8)에 의하여 부유물을 외부로 걷어내어 처리되며 바닥에 깔아앉은 무거운 침전물은 바닥슬러지 수집기(10)에 의하여 공지의 방법으로 처리되기 때문에 오·폐수를 효과적으로 정화시킨후 다음공정으로 보낼수 있게되는 것이다.Therefore, when fine air is attached to the surface of the solids and flows into the floating separation tank 1, it floats on the water of the floating separation tank by buoyancy and is processed by lifting the floating matter to the outside by the skimmer device 8, and the heavy sediment laid on the floor. Since the bottom sludge collector 10 is treated by a known method, it is possible to effectively purify the wastewater and send it to the next process.

이렇게 하므로써 기존의 설비와 비교할때 아래표와 같은 효과의 차이를 얻을 수 있으며By doing so, the following effects can be obtained compared to the existing equipment.

이와같이된 본 발명은 가변구동모터로 회전시키는 공기흡인관(25)의 회전속도를 가변시키는 방법으로 오·폐수의 고형물 분리에 적절한 공기량을 조정하여 공급할수 있으며 조정된 공기를 응집제와 같이 챔버(2) 속에서 고속교반시켜 혼합응집을 실시하므로 바닥에 가라앉은 무거운 입자도 재부상을 시켜 분쇄하고 동시에 미세공기방울을 연속적으로 부착시킬수 있어서 부상효율을 95%이상 높일수 있는 효과가 있으며 공기를 발생시키는 별도의 장치나 공기공급을 위한 가압탱크 등의 복잡한 설비가 필요치 않아 시설비, 운전비, 동력비, 보수 유지비 등의 비용을 저렴하게 할수 있고 압축기 및 가압탱크 등의 위험한 기계나 기구를 사용치 않아 설비의 안정성이 확보되므로 비숙련공도 손쉽게 운전이 가능하여 산업재해예방은 물론 인건비가 절약되는 장점이 있고The present invention as described above is a method of varying the rotational speed of the air suction pipe 25 to be rotated by the variable drive motor can be supplied by adjusting the amount of air suitable for the separation of solids of the waste water, and the adjusted air chamber (2) as a flocculant Since the mixture is agglomerated by high speed stirring in the air, heavy particles that have sunk on the floor can be resuspended and pulverized, and at the same time, micro air droplets can be attached continuously to increase floating efficiency by more than 95%. It does not require complicated equipment such as pressurized tank for equipment or air supply, so it is possible to lower the cost of facility cost, operation cost, power cost, maintenance and maintenance cost, and to secure the stability of the facility by not using dangerous machinery or equipment such as compressor and pressurized tank. As a result, unskilled workers can operate easily, preventing industrial accidents and saving labor costs. Points and

특히, 환경오염방지시설에서 침전조 대용으로 사용할 경우에는 시설부지를 약 10배이상 절감할수 있어 공장의 부지난을 획기적으로 감소시킬수 있으며In particular, when used as a sedimentation tank in an environmental pollution prevention facility, the facility site can be reduced by about 10 times, which can drastically reduce the site shortage of the factory.

또한, 본 발명의 사용용도에는 각종 환경오염방지시설뿐만 아니라 비중이 물보다 가벼운 폐수를 처리하기 위한 중간공정 또는 침전조 대용, 폐수의 재활용 시설, 제지공장 등 각종 오·폐수 처리 등의 분야에도 다양하게 적용이 가능하여 활용범주가 넓어 이용가치가 큰 효과를 얻는 것이다.In addition, the use of the present invention is not only various environmental pollution prevention facilities but also various fields such as intermediate process or sedimentation tank treatment, wastewater recycling facility, paper mill, etc. As it is applicable, the scope of use is wide, and the value of use is great.

Claims (3)

오·폐수 부상분리조(1)의 유입구(101) 측에 공기공급챔버(2)를 설치하여 상단에 공기공급장치(20)를 부착하고 그속에 공기흡인관(25)을 장치하여 하단에 임펠러(3)를 갖추므로서 외부의 공기를 자연스럽게 흡인하여 공기공급챔버(2) 속에서 미분화시키고 이를 오·폐수 속의 고형물에 부착시켜 부상분리조에 투입하는 수단으로 오·폐수 속에 있는 고형물을 분리할수 있게한 오·폐수의 처리방법Install an air supply chamber (2) on the inlet 101 side of the waste water flotation tank (1), attach the air supply device (20) at the top, and install the air suction pipe (25) therein to the impeller ( 3) It is able to separate the solids in the wastewater by means of inhaling the outside air naturally and undifferentiating it in the air supply chamber (2) and attaching it to the solids in the wastewater. Wastewater treatment method 오·폐수 부상분리조(1)의 유입구(101)와 오·폐수 교반저장조(4)의 배출구 사이에 공기공급챔버(2)를 직렬로 설치하여 그 상단에 길게 지지관(21)을 세우고 지지관 상부에 가변구동모터(인버터모터)(23)를 장치하여 그 회전축(24)을 지지관(21)의 내부에서 회전될수 있게 장치한 공기흡인관(25)의 상단부와 접속시킨 후 접속부 둘레에 다수의 흡기공(26)을 형성시키고 공기흡인관의 하단은 공기공급챔버(2) 속 중앙까지 삽입하여 그끝에 임펠러(3)를 부착시켜 임펠러의 둘레에 방사형으로 배기관(31)을 돌출시켜 배기관이 회전하는 방향쪽 표면에 칼날형상의 날개(32)를 부착시킨 구성의 공기공급장치(20)를 갖추어서 공기공급챔버(2)의 오·폐수 유입구측에 고분자 응집제 공급장치관(5)을 접속시켜 일체형으로 만든 오·폐수 처리장치An air supply chamber (2) is installed in series between the inlet 101 of the waste water floating separation tank 1 and the outlet of the waste water agitating reservoir 4, and the support pipe 21 is erected and supported on its upper end. A variable drive motor (inverter motor) 23 is installed on the upper part of the tube, and the rotary shaft 24 is connected to the upper end of the air suction pipe 25 provided to be rotated inside the support tube 21. The intake hole 26 of the air inlet pipe is inserted into the center of the air supply chamber 2, and the impeller 3 is attached to the end thereof so that the exhaust pipe 31 radially protrudes around the impeller so that the exhaust pipe rotates. The air supply device 20 having the blade-shaped blade 32 attached to the surface on the side in the direction of the direction is provided, and the polymer coagulant supply device pipe 5 is connected to the waste water inlet side of the air supply chamber 2. Integrated Wastewater Treatment System 상기 2항에서 임펠러(3) 배기관(31)을 중간부측이 회전방향 쪽으로 튀어나오게 곡형으로 하고 숫자가 2개이상 15개미만일 것을 포함하는 상기 2항 기재의 오·폐수 처리장치The wastewater treatment apparatus according to the above 2 item, wherein the impeller 3 exhaust pipe 31 is curved so that the intermediate part protrudes in the rotational direction, and the number is 2 or more and less than 15.
KR1019990023355A 1999-06-17 1999-06-17 A sewage and / or wastewater treatment method, and an equipment thereof KR100301292B1 (en)

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