KR20130096408A - Wastewater treatment system using venturi tube - Google Patents

Abstract

PURPOSE: A wastewater treatment facility is provided to drastically cut production costs due to volume compactification and to efficiently remove bubbles drifting on the wastewater surface. CONSTITUTION: A wastewater treatment facility includes a bubble capture member (100), a coupling hose (300), a venturi tube (500), and a water pump (400). The bubble capture member is disposed near the wastewater surface stored in an aeration tank (10). The coupling hose is coupled with the bubble capture member by a pipe and absorbs air from the outside. The venturi tube is arranged in the lower part of the coupling hose to be connected to the lower part of the coupling hose and discharges fluid in the lower part of the aeration tank. An underwater pump absorbs and sends wastewater in the aeration tank to the inside of the venturi tube.

Description

Wastewater Treatment System Using Venturi Tube {WASTEWATER TREATMENT SYSTEM USING VENTURI TUBE}

The present invention relates to a wastewater treatment apparatus using a venturi tube, and more particularly, to a wastewater treatment apparatus using a venturi tube having an improved structure to perform a wastewater treatment process such as bubble removal, aeration, and agitation using a venturi tube. will be.

In general, the flow of wastewater from advanced societies contains various bio-solid compounds derived from the human body. Various treatment processes have been developed for decades to treat the flow of fluids containing biosolids, since most of these streams contain various contaminants from the human body. These contaminants generally consist of various types of microorganisms, including organic compounds and pathogens that are harmful to the human body.

Conventionally, a method of supplying oxygen by installing an acid pipe in an aerobic tank when purifying livestock manure or sewage is common, and in this case, a stirring facility is required to increase the distribution efficiency so as to distribute oxygen evenly in the aerobic tank.

By the way, the existing agitation facility is most of the propeller type, which is not easy to install, and also has a disadvantage that the manufacturing cost due to the difficulty of the operation is expensive.

When the aeration is carried out by supplying oxygen, since a large amount of oxidation and bubbles are generated due to the activity of microorganisms and overflows out of the aerobic tank, a nozzle or the like is installed to remove bubbles, but the viscosity of the oxidized bubbles As it is high, the removal of bubbles is not easy.

Problems caused by bubbles include the following:

1) Discontinuity of Treatment Process

2) Loss of biosolid liquid flow through the bypass

3) Pollution around

4) Shortening the expected life of the mechanical parts of the reactor

5) Difficult situations in controlling key factors such as pH, temperature, redox value, aeration level and motor speed due to foam

6) Delay of the whole process that adversely affects the continuous automatic processing system

Mechanical defoamers, such as rotating blades, liquid defoamers using their own biosolid liquid waste streams, or tap water, have been introduced for defoaming to remove these bubbles.

The basic principle of these conventional defoamers is to physically rupture the bubbles and convert them from foam to liquid state. This is somewhat effective for small amounts of mild foam, but not much for high viscosity foams.

Therefore, not only are the process results often unsatisfactory, but also the mechanical defoamers require high equipment maintenance, high energy costs, and frequent equipment inspection. In particular, maintenance of high-strength equipment such as periodic replacement of moving parts such as blades and motors, and periodic cleaning procedures due to severe corrosion problems are of major concern.

In addition, due to the equipment such as diffuser, agitating equipment, defoaming device installed in the aerobic tank process required for waste water treatment, the volume is increased, which has the disadvantage of increasing the size of the installation site and the resulting cost.

The present invention has been proposed in view of the above-mentioned problems, and its object is to simultaneously remove bubbles, stir and aeration at one device using a venturi tube in an aeration tank process required for a livestock waste or sewage purification facility. The present invention provides a wastewater treatment apparatus using a venturi tube capable of compacting a volume and easily removing bubbles.

The present invention for achieving the above object is a bubble collecting member disposed in a position close to the surface of the waste water stored in the aerobic tank,

A connection hose connected to the bubble collecting member and configured to suck air from the outside;

A venturi tube disposed to be connected to a lower portion of the connection hose and for discharging a fluid from the lower portion of the exhalation tank;

It is connected to one side of the venturi tube is characterized in that it comprises a submersible pump for suctioning the wastewater in the exhalation tank and pumped into the venturi tube.

The bubble collecting member is composed of a mesh member formed with a plurality of perforations.

The connection hose is further provided with a control valve for adjusting the intake amount of air.

The venturi tube has a hollow formed so that one side and the other side communicate with each other, and a spiral groove portion for converting the fluid flowing into the inner circumferential surface of the hollow inlet side into a vortex form.

A buoyancy member is provided at the top of the connection hose to raise the foam collecting member to a height corresponding to the surface of the wastewater.

First, since the process of removing bubbles, stirring, and aeration can be performed simultaneously using a processing apparatus equipped with a venturi tube, the volume can be compacted, and thus the manufacturing cost can be greatly reduced.

Second, by using the buoyancy member to arrange the net bubble collecting member on the water surface of the waste water, there is a useful effect that can efficiently remove the bubbles floating on the water surface of the waste water.

Third, by supplying the fine bubbles generated in the process of pumping the wastewater in the exhalation tank to the venturi tube side using the submersible pump, there is an advantage that the agitation and aeration effect can be obtained with one device.

Fourth, since the bubble collecting member is floated on the water surface by the buoyancy member, there is an advantage that can maintain the height close to the water surface irrespective of the variable level of the waste water stored in the aerobic tank.

1 is a schematic view showing the configuration of a wastewater treatment apparatus using a venturi tube according to the present invention.
Figure 2 is a cross-sectional view showing the internal structure of the venturi tube of the present invention.
Figure 3 is a side view of Figure 2;

The present invention is disposed in an aerobic tank for treating wastewater such as livestock manure or sewage to simultaneously perform a bubble removal, agitation, aeration process with a single device, and a simple configuration using a venturi tube formed with a natural sound pressure Each operation is to be made.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

When the wastewater treatment apparatus using the venturi tube according to the present invention is described with reference to FIGS. 1 and 2, the configuration is to be close to the surface of the wastewater (livestock manure or sewage, etc.) stored to be accommodated in the aerobic tank 10. Arranged and connected to the bubble collecting member 100 capable of collecting bubbles, the connection hose 300 is connected to the lower portion of the bubble collecting member 100, the outside air is introduced, and the lower portion of the connection hose 300 And a venturi tube 500 for discharging the flow rate from the lower portion of the exhalation tank 10, and an underwater pump 400 for suctioning the wastewater in the exhalation tank 10 and pumping the waste water into the venturi tube 500.

In more detail, the connection hose 300 is made of a flexible material, buoyancy member for raising the foam collecting member 100 on the upper side to be located at a height (upper side adjacent to the water surface) corresponding to the water surface of the waste water ( 200) are combined.

The buoyancy member 200 is configured in the form of a buoy or tube to perform the function of floating the bubble collecting member 100 above the water surface.

The buoyancy member 200 varies in height as the water level of the waste water stored in the exhalation tank 10 is variable, and even if the water level is variable, the foam collecting member 100 is always floated upward above the water surface.

Foam collecting member 100 is composed of a web formed with a plurality of perforations, has a structure coupled to the upper end of the connection hose (300).

In addition, the connection hose 300 is provided with a control valve 350 for adjusting the intake amount of air introduced from the outside in the middle portion. This is to adjust the inflow amount of air introduced into the venturi tube 500.

Submersible pump 400 is formed in the inlet 410 for introducing the wastewater in the exhalation tank 10 at the bottom, venturi wastewater flowing through the inlet 410 by the driving force of the underwater motor driven by the external power is applied It has a function to feed the pipe 500 side.

In addition, the venturi tube 500 has a hollow 512 is formed so that one side and the other side communicate with each other, the spiral groove 550 for converting the fluid flowing into the inner peripheral surface of the inlet 520 side of the hollow 512 into the vortex form Has a formed structure.

The helical groove 550 has a larger width ℓ 2 on the other end (center of the hollow 512) than the one end ℓ 1 of the inlet 520 (ℓ 1 <ℓ 2), and thus the inlet 520. It is preferable to form the width from the side toward the nozzle portion 540 to expand. This is to amplify the turbulence and vortex when the vortex of the fluid passing through the inlet 520 occurs.

Venturi tube 500 is connected to the lower end of the connection hose 300 in the upper outer circumference, the inlet 520 is connected to the submersible pump 400 is formed on one side, the outlet for the discharge of the flow rate on the other side 530 has a formed structure.

Reference numeral "515" indicates a connection hole to which the connection hose 300 is fastened.

The operation of the present invention having such a configuration will now be described.

In the wastewater treatment apparatus using the venturi tube according to the present invention, after the buoyancy member 200 is coupled to the upper portion of the connection hose 300 to generate the buoyancy, the bubble of the trapping net shape is formed on the upper side of the buoyancy member 200. Fit the collecting member 100 and the upper end of the connection hose 300.

As a result, the bubble collecting member 100 disposed above the buoyancy member 200 is floated on the water surface by the buoyancy force of the buoyancy member 200 floating on the surface of the waste water.

At this time, the lower end of the connection hose 300 is connected to the venturi tube 500 to introduce the outside air into the hollow 512.

Subsequently, when the submersible pump 400 is operated, the wastewater in the aerobic tank 10 flows through the inlet 410 and is pumped to the venturi tube 500, and then passes through the hollow 512 in the venturi tube 500. It is discharged into the aerobic tank 10.

At this time, the venturi tube 500 is naturally a negative pressure is formed by the Bernoulli principle, the vacuum negative pressure acts in the connection hose 300 by the negative pressure is introduced into the outside air.

As the external air flowing into the connection hose 300 is introduced, air is introduced into the hollow 512 of the venturi tube 500, and the introduced air is discharged into the aeration tank 10 through the outlet of the venturi tube 500. Thus, oxygen is supplied into the exhalation tank 10.

At this time, the control valve 350 may maintain the optimum aeration state by adjusting the supply of negative pressure and oxygen.

On the other hand, since the foam collecting member 100 is connected by the connection hose 300, as the negative pressure is formed in the connection hose 300 to suck the bubbles floating on the water surface of the waste water, and the suction of the foam is completed to foam In the absence of this, the outside air is inhaled.

At this time, since the foam collecting member 100 is configured in the form of a mesh formed with a plurality of perforations in the process of sucking the foam, the foam is in contact with the foam collecting member 100 has the advantage that the foam is removed.

In addition, since the sucked bubbles and air are supplied into the aeration tank 10 through the connection hose 300 and the venturi tube 500, the aeration effect of supplying fine bubbles into the aeration tank 10 is provided. At the same time while performing the function of agitating the wastewater in the aeration tank 10 while naturally removing the bubbles on the surface of the wastewater.

Therefore, according to the present invention, a vacuum negative pressure is naturally formed in the connection hose 300 during a series of processes in which the wastewater, which is a fluid, is pumped and discharged to the venturi tube 500 according to the operation of the submersible pump 400. In addition to being able to efficiently remove bubbles while sucking outside air, stirring is simultaneously performed and has the advantage of having an aeration effect due to fine bubbles.

Description of the Related Art [0002]
10: aerobic tank 100: bubble collecting member
200: buoyancy member 300: connection hose
350: control valve 400: submersible pump
410: inlet 500: venturi tube
512: hollow 515: connector
520,530: (entrance, exit)
550: spiral groove

Claims (5)

A foam collecting member 100 disposed at a position close to the surface of the waste water stored in the aerobic tank 10,
A connection hose 300 connected to the bubble collecting member 100 and suctioning air from the outside;
A venturi tube 500 disposed to be connected to a lower portion of the connection hose 300 and for discharging a fluid from the lower portion of the aerobic tank 10;
It is connected to one side of the venturi tube 500 and the wastewater treatment using a venturi tube, characterized in that the water pump 400 for suctioning the wastewater in the aerobic tank 10 and pumped into the venturi tube 500 Device. The wastewater treatment apparatus according to claim 1, wherein the foam collecting member (100) comprises a mesh member having a plurality of perforations formed therein. The waste water treatment apparatus according to claim 1, wherein the connection hose (300) further includes a control valve (350) for adjusting the suction amount of air. The venturi tube 500 has a hollow 512 formed so that one side and the other side communicate with each other, and a spiral groove 550 for converting the fluid flowing into the inner circumferential surface of the inlet side of the hollow 512 into a vortex form. Waste water treatment apparatus using a venturi tube, characterized in that formed. The buoyancy member 200 according to any one of claims 1 to 4, wherein an upper side of the connection hose 300 is provided with a buoyancy member 200 for raising the foam collecting member 100 to a height corresponding to the surface of the wastewater. Wastewater treatment apparatus using a venturi tube characterized in that.

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