KR20180024754A - off gas collecting apparatus having variable volume for aeration tank - Google Patents

Abstract

The present invention relates to an off-gas collecting apparatus for an aeration tank having a volume-variable structure, comprising: a floating means made of flexible materials having a space formed therein to provide a hollow cross section, having an inlet for introducing the outside air or discharging the inside air and a lid for opening and closing the inlet, and having a shape of a closed curve having an opened center part; a variable membrane of elastic materials having an outer end fixed along an inner perimeter of the floating means to block the opened center part of the floating means; a discharging means connected to the variable membrane to supply the air collected below the variable membrane to the outside; a diaphragm extended to the lower direction of the floating means and fixed along the perimeter of a lower part of the floating means; and a plurality of weights fixed on the lower part of the diaphragm.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an off-gas collecting apparatus for an aeration tank having a volume-

TECHNICAL FIELD The present invention relates to an offgas collecting apparatus for an aeration tank having a volume variable structure, and more particularly to an offgas collecting apparatus for an aeration tank having a structure in which the volume varies depending on the amount of offgas generated in the aeration tank.

Currently, suspended solids (SS) in an aeration tank are referred to as mixed suspended solids (MLSS) in the activated sludge process for biological water treatment and activated sludge (activated sludge) in the aeration tank Concentration is an important indicator for the operation management of water treatment.

In addition, the activated sludge process commonly known is a method for biological treatment of contaminated water by using aerobic microorganisms. The general constitution of the system is composed of a flow control tank, an aeration tank, a settling tank, a transfer tank, and a discharge tank.

Therefore, the flow rate adjusting tank controls the amount of contaminated water such as sewage, sewage, and wastewater flowing into the flow rate adjusting tank to allow a certain amount of water to flow into the aeration tank, and in the aeration tank, The water treatment can be performed by consuming various pollutants such as organic substances contained in the polluted water by using aerobic microorganisms as food for microorganisms.

Therefore, in the aeration tank, a nozzle is fixed to the lower part of the aeration tank for the survival and growth of the aerobic microorganisms, and the air is forcedly supplied to the nozzle at a high pressure so that the dissolved oxygen in the contaminated water is kept constant.

In the conventional case, in order to measure the dissolved oxygen in the water, a collecting device is installed on the surface of the aeration tank, the off gas discharged from the treated water of the aeration tank is collected and the off gas contained in the air supplied to the aeration tank through the nozzle The amount of oxygen and the amount of oxygen contained in the off-gas discharged from the treated water in the aeration tank were measured and compared to calculate the amount of dissolved oxygen in the treated water in the aeration tank.

However, the conventional off-gas collecting apparatus is bulky and heavy, which makes it difficult to install and store the apparatus.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an airtight container which can minimize the volume during storage and transportation, An object of the present invention is to provide an offgas collecting apparatus for an aeration tank having a volume variable structure.

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the above object, there is provided an offgas collecting apparatus for an aeration tank having a volume variable structure according to the present invention. The apparatus has a hollow space formed therein with a hollow cross section, and has an inlet port through which external air is introduced, And an elastic member which is fixed along the inner periphery of the floating means and shields the opened central portion of the floating means, the flexible member being made of a flexible material having the shape of a closed curve with the central portion thereof opened, A diaphragm connected to the variable membrane to discharge the air collected at the lower portion of the variable membrane to the outside and a diaphragm fixed around the lower end of the floating means so as to extend below the floating means, And a plurality of weight bodies fixed to the lower end of the diaphragm.

The variable membrane may be fixed to a position where the floating means is in contact with the water surface of the aeration tank or an upper portion of the water surface in a state where the floating means is initially installed on the water surface of the aeration tank.

The variable membrane and the floating means can be detachably fixed by means of the detachment means.

At least a part of the floating means may be formed as a corrugated pipe.

Wherein said discharging means comprises: a first discharging means having a hollow shape and being fixed to said deformable film through said deformable film and having a thread formed on an inner peripheral surface thereof; and a second discharging means having a hollow shape, A second discharging means which is inserted into the means while being screwed and a conveying pipe which conveys the discharged air through the first discharging means and the second discharging means.

At least one of the floating means and the variable membrane may be formed with a folding guide line pressed by a press so as to have a relatively thin thickness compared to the periphery.

The variable membrane may be provided with a check valve which is opened when the pressure of the air trapped between the variable membrane and the water surface becomes higher than a predetermined pressure and discharges the collected air to the outside.

One end of the wire is fixed to the outer surface of the floating means at a plurality of points, and the other end of the wire is fixed to a vertical frame provided in the aeration tank or the aeration tank.

According to the offgas collecting apparatus for an aeration tank having the volume variable structure according to the present invention, the volume during storage and transportation can be minimized, and when installed in the aeration tank, the volume can be increased by injecting air, There is an easy effect.

In addition, the internal volume of the variable membrane is varied according to the amount of off-gas discharged from the aeration tank. In the initial installation, however, the variable membrane remains in contact with the water surface of the aeration tank so that external air is not introduced into the interior of the variable membrane. Only the off-gas is trapped between the water surface of the variable membrane and the aeration tank, and the measurement accuracy of dissolved oxygen is improved, and the measurement time can be reduced.

In addition, the size of the floating means and the variable membrane can be variously adjusted according to the size of the aeration tank, and the floating means and the variable membrane that have been used can be folded and stored.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a perspective view of an offgas collecting apparatus for an aeration tank having a volume variable structure according to an embodiment of the present invention.
2 is a longitudinal sectional view of an offgas collecting apparatus for an aeration tank having a volume variable structure according to an embodiment of the present invention.
FIG. 3 is a perspective view showing the state in which the air inside the floating means is discharged in FIG. 1; FIG.
Fig. 4 is a perspective view showing a state in which the floating means and the variable membrane are folded in Fig. 3;
5 is a longitudinal sectional view showing a state in which the variable membrane and the floating means of the off-gas trapping apparatus for aeration tank having a volume variable structure according to another embodiment of the present invention are separated.
Fig. 6 is a perspective view of Fig. 1 showing a state in which a part of the floating means is formed as a corrugated pipe.
Fig. 7 is a perspective view showing the diaphragm fixed to the lower end of the floating means in Fig. 1. Fig.
Fig. 8 is a longitudinal sectional view showing a state in which the diaphragm and the weight are fixed to the lower end of the floating means in Fig. 2. Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

FIG. 1 is a perspective view of an offgas collecting apparatus for an aeration tank having a volume variable structure according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of an offgas collecting apparatus for an aeration tank having a volume variable structure according to an embodiment of the present invention. Fig. 7 is a perspective view showing the state in which the diaphragm is fixed to the lower end of the floating means in Fig. 1, Fig. 8 is a longitudinal sectional view showing a state in which the diaphragm and the weight are fixed to the lower end of the floating means, to be.

1 to 8, an offgas collecting apparatus for an aeration tank (hereinafter referred to as a collecting apparatus) having a volume variable structure according to an embodiment of the present invention includes a collecting unit A variable membrane 200, a discharging means 300, and a diaphragm 400 (not shown), which are installed in the treated water 20 of the aeration tank 10 to collect off gas, And a weight body 500.

First, the floating means 100 is made of a flexible material and has a hollow portion 110 formed therein with a space. For example, the floating means 110 may have an "o" shaped cross section.

The floating means 100 is formed with an inlet 101 communicating with the hollow 110 so that outside air is injected into the hollow 110 or air in the hollow 110 is discharged to the outside, A cap 102 for opening and closing the injection port 101 is formed.

The floating means 100 takes the form of a closed curve with the center portion 120 open. For example, the floating means 100 may be formed in the shape of a donut having a shape of 'o' or 'k', and may be formed similar to the shape of a life tube.

FIG. 3 is a perspective view showing the state in which the air inside the floating means is discharged in FIG. 1, and FIG. 4 is a perspective view showing a state in which the floating means and the variable film are folded in FIG.

Referring to FIGS. 3 to 4, air is not injected into the floating means 100 at the normal time, so that the collection device can be kept in a state in which the volume is minimized.

Thereafter, air is filled in the floating means 100 as shown in Figs. 1 and 2 in order to flood the collecting device in the treated water 20 of the aeration tank 10.

Specifically, the cap 102 is opened to open the injection port 101, air is injected into the hollow 110 of the floating means 100 through the opened injection port 101, and then the cap 102 The injection port 101 is closed.

Thereafter, the used floating means 100 needs to be reduced in volume again to facilitate movement and storage.

For this, the cap 102 is opened to open the injection port 101 and the air filled in the hollow 110 of the floating means 100 is discharged to the outside through the opened injection port 101, Minimize volume.

The variable membrane 200 is made of an elastic material and may have a shape of 'o' or 'k' to correspond to the shape of the floating means 100. The outer end of the flexible membrane 200 is fixed along the inner circumference of the floating means 100 to shield the open center portion 120 of the floating means 100.

The variable film 200 may be formed of a material such as rubber, silicon, or the like.

The variable membrane (200) is integrally connected to the floating means (100), and the connection portion is sealed to prevent air from escaping.

Referring to FIG. 2, the deformable film 200 may be deformed convexly while maintaining a flat state, and the deformable film 200 may be deformed by the deformable film 200 and the water surface of the process water 20 The size of the interspace can be varied.

When the variable membrane 200 is formed of an elastic material as described above, the size of the variable membrane 200 is changed in real time according to the amount of off-gas of the processing water 20 collected in the variable membrane 200 And the amount of off gas captured in the variable film 200 from the outside can be visually confirmed.

In the present embodiment, the variable membrane 200 can be fixed at a position where the floating means 100 is initially installed on the water surface of the aeration tank 10, or at a position where the floating means 100 is in contact with the water surface of the aeration tank 10 or above the water surface.

Referring again to FIG. 2, it can be seen that the variable membrane 200 is in contact with the water surface of the treated water 20.

External air can not flow between the variable membrane 200 and the treated water 20 when the variable membrane 200 is in contact with the water surface of the treated water 20 as described above. Therefore, only the off-gas to be discharged from the treatment water 20 can be collected purely between the variable membrane 200 and the treatment water 20, so that the measuring time of oxygen in the off-gas can be reduced and the measurement accuracy can be increased.

The discharge means 300 is connected to the central portion of the variable membrane 200 to discharge the air trapped between the variable membrane 200 and the surface of the treated water 20 to the outside.

The air discharged to the outside through the discharging means 300 is sent to a measuring unit (not shown), and the measuring unit (not shown) measures the amount of oxygen contained in the off-gas through an O ₂ sensor or a CO ₂ sensor The oxygen consumption amount in the treated water 20 can be indirectly confirmed. In addition, the dissolved oxygen amount of the treated water 20 can be predicted through the oxygen consumption amount in the treated water 20.

A diaphragm 400 is fixed to the lower end of the floating means 100 along the periphery of the floating means 100 and a weight 500 is fixed to the lower end of the diaphragm 400.

7 to 8, the upper end of the diaphragm 400 is integrally connected to the lower end of the floating means 100, and the connection portion thereof is sealed to prevent water or air from escaping. The diaphragm 400 is formed of a waterproof material and extends downwardly of the floating means 100. The diaphragm 400 may have a cross-section of 'o' or 'k' shape in correspondence with the shape of the floating means 100.

The weight 500 is connected to the lower end of the diaphragm 400. The weight 500 pulls the diaphragm 400 downward so that the diaphragm 400 is kept in a tense state and the diaphragm 400 is lifted by the weight 500 as well as the lifting means 100 and the variable membrane 200 May be fixed.

The floating means 100 maintains a state in contact with the water surface of the treated water 20 in a state in which the collecting device is installed in the aeration tank 10. [ A part of the lower end of the floating means 100 may be in a state of being caught in the treatment water 20. [ Therefore, the air trapped in the variable membrane 200 can not escape to the outside.

However, there may be a gap between the surface of the floating means 100 and the surface of the treatment water 20, while floating the floating means 100 to the upper part of the treatment water 20 for several reasons.

For example, when a large amount of off-gas is collected inside the variable membrane 200, a high pressure is formed inside the variable membrane 200, and when a pressure larger than the permissible pressure of the variable membrane 200 is formed, The variable membrane 200 and the floating means 100 are floated and a clearance is generated between the floating means 100 and the treated water 20. [

As another example, the variable membrane 200 and the floating means 100 may float due to an external environmental factor such as wind or the like, and a clearance may be generated between the floating means 100 and the treated water 20. [

When the floating means 100 floats as described above, the off-gas collected in the variable membrane 200 escapes to the outside through the gap between the floating means 100 and the process water 20, 200).

However, if the diaphragm 400 and the weight 500 are formed at the lower end of the lifting means 100 as described above, even if the floating means 100 is separated from the treated water 20, The off-gas trapped in the variable membrane 200 can not escape to the outside, and the outside air is not also introduced into the interior of the variable membrane 200.

In the present embodiment, the diaphragm 400 may be detachably connected to the lower end of the floating means 100, and the weight 500 may also be detachably connected to the lower end of the diaphragm 400.

5 is a longitudinal sectional view showing a state in which the variable membrane and the floating means of the off-gas trapping apparatus for aeration tank having a volume variable structure according to another embodiment of the present invention are separated.

Referring to FIG. 5, the variable membrane 200 and the floating means 100 can be detachably fixed by the detachable means 610 and 620.

The detachment means 610 and 620 may be provided with a zipper or the like and the variable membrane 200 may be detached from the floating means 100 after the variable membrane 200 is coupled to the floating means 100 .

The detachment means 610 and 620 may include a sealing member that hermetically seals water or air between the variable membrane 200 and the floating means 100.

Since the variable membrane 200 and the floating means 100 are detachably connected to each other as described above, the floating means 100 or the variable membrane 200 of various sizes can be easily stored, It is possible to use the variable membrane 200 and the floating means 100 suitable for each size and to use them and to replace or repair the entire structure when the deformable membrane 200 or the floating means 100 is damaged There is an advantage that only the damaged film 200 or the floating means 100 damaged or damaged can be replaced or repaired.

Fig. 6 is a perspective view of Fig. 1 showing a state in which a part of the floating means is formed as a corrugated pipe.

Referring to FIG. 6, at least a part of the floating means 100 may be formed as a corrugated pipe 130.

The corrugated pipe (130) means a pipe formed by gathering corrugated wire in the form of a wind tunnel of an accordion. When the air is supplied to the inside, it expands while expanding.

As described above, when the bellows pipe 130 is formed in a part of the floating means 100, the size of the floating means 100 can be reduced when the floating means 100 is stored.

In addition, the degree of expansion varies depending on the amount of air injected into the corrugated pipe 130, and the circumferential length of the floating means 100 can be varied according to the degree of expansion. Therefore, the size of the floating means 100 can be variously formed to match the size of the aeration tank 10 in which the collecting device is installed.

3, the discharging means 300 has a hollow shape and is fixed to the variable membrane 200 through a central portion of the variable membrane 200 and has a first discharge means (310), a second discharging means (320) having a hollow shape and having a thread formed on the outer peripheral surface thereof and having a lower end screwed into the first discharging means (310) And a transfer pipe 330 for transferring the air discharged through the discharge unit 320 to a measurement unit (not shown).

The connecting portion between the variable membrane 200 and the first discharge means 310, the first discharge means 310 and the second discharge means 320, and the second discharge means 320 with the transfer tube 330 are connected to the inside It may be in a state of being hermetically sealed by a sealing member so that air may escape to the outside or external air may not be introduced.

Therefore, when storing the floating means 100 and the variable film 200, the second discharging means 320 and the transfer pipe 330 are separated from the first discharging means 310, have.

In this embodiment, the first discharge means 310 may be provided with negative pressure means (not shown) for discharging the air in the space between the variable membrane 200 and the water surface of the treated water 20 to the outside.

The negative pressure means (not shown) is provided for discharging outside air remaining between the variable membrane 200 and the water surface of the treated water 20 to the outside of the variable membrane 200 when the collecting apparatus is initially installed, Only the off-gas discharged from the treated water 20 can be collected between the variable membrane 200 and the treated water 20, as shown in FIG.

3 to 4, at least one of the floating means 100 and the variable membrane 200 is formed with a folding guide line 140 pressed by a press so as to be relatively thinner in thickness than the periphery thereof .

The folding guide line 140 is formed so as not to affect the expansion and contraction operations of the floating means 100 and the variable membrane 200 and is formed so as to extend inwardly of the inwardly recessed line So that the operation of folding the floating means 100 and the variable membrane 200 can be facilitated.

6 to 7, when the pressure of the air trapped between the variable membrane 200 and the water surface of the treated water 20 becomes higher than a preset pressure, the variable membrane 200 is opened, A check valve 700 for discharging the gas to the outside can be provided.

When a large amount of off-gas is collected in the variable membrane 200 in the process of collecting the off-gas of the treated water 20, a high pressure is formed inside the variable membrane 200, The variable membrane 200 and the floating means 100 float due to the pressure when the pressure is larger than the permissible pressure and the floating means 100 is separated from the treated water 20 and is collected in the variable membrane 200 Off gas can be discharged to the outside.

However, when the check valve 700 is formed as described above, even if a pressure greater than a permissible pressure is formed between the water surface of the variable membrane 200 and the treated water 20, the check valve 700 opens, The pressure in the space between the variable membrane 200 and the water surface of the process water 20 can be kept below the allowable pressure.

8, one end of the wire 810 is fixed to a plurality of points on the outer surface of the floating means 100 and the other end of the wire 810 is connected to the aeration tank 10 or the aeration tank 10, As shown in FIG.

The floating means 100 in a floating state can be moved by the influence of wind or the like. In addition, there is a possibility that the floating means 100 may be damaged during the moving process, or the floating means 100 may be separated from the process water 20.

In order to prevent such a situation, a means for fixing the floating means 100 is required.

The floatation means 100 is connected to the vertical frame 820 provided in the aeration tank 10 or the aeration tank 10 by wires 810 to suppress the movement of the floatation means 100, ) Is maintained in a fixed state.

Alternatively, the wires 810 may be connected to the front and rear sides of the floating unit 100, and the vertical frame 820 may be installed in the front, rear, left, and right directions of the floating unit 100. In addition, the vertical frame 820 may be provided with a pulley 830 through which the wire 810 is wound and unwound.

Accordingly, when the pulley 830 is rotated in both directions to wind and unwind the wire 810, the length of the wire 810 is adjusted. When the length of the wire 810 is adjusted as described above, the position of the floating means 100 in the front-rear direction can be adjusted, and the installation and recovery of the floating means 100 can proceed more easily.

It is also possible to periodically change the position of the floating means 100 to collect the off-gas discharged from various positions of the treated water 20.

Hereinafter, the installation and recovery process of the offgas collecting apparatus for an aeration tank having a volume variable structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG.

First, as shown in FIG. 3, air is blown into the floating means 100 without wind to make a shape as shown in FIG.

Specifically, the cap 102 is opened to open the injection port 101, air is injected into the hollow 110 of the floating means 100 through the opened injection port 101, and then the cap 102 The injection port 101 is closed.

Thereafter, when the collecting device is placed in the aeration tank 10, the collecting device maintains a floating state in the treated water 20 by the floating means 100.

At this time, the diaphragm 400 is inflated and extends downward of the floating means 100 while the weight 500 is moved into the treatment water 20 by its own weight.

Further, the variable membrane 200 is in a state of being in contact with the treatment water 20 or located above the treatment water 20.

Thereafter, the off-gas is discharged from the process water 20 after a predetermined time after the floating means 100 is transferred to a desired position, and the variable film 200 is deformed convex upward by the discharged off- The volume increases.

As described above, the off-gas collected in the variable membrane 200 is transferred to the measurement unit (not shown) through the discharge means 300 to measure the oxygen amount.

On the other hand, in order to recover the used floating means 100, the floating means 100 is taken out of the aeration tank 10 first.

Thereafter, the cap 102 is opened to open the injection port 101, and the air filled in the hollow 110 of the floating means 100 is discharged to the outside through the opened injection port 101 so that the volume of the floating means 100 .

As shown in FIGS. 3 to 4, the floating means 100, in which the internal air is completely removed, separates the second discharge means 320 and the transfer pipe 330 from the first discharge means 310 and floats along the guide line 140 The means 100 and the variable membrane 200 are folded and stored.

At this time, the diaphragm 400 or the weight 500 can be separated from the floating means 100 and stored separately.

According to the present invention as described above, the volume of the collecting device can be reduced to a minimum during storage and transportation, and the volume can be increased by injecting air when installed in the aeration tank 20, The internal volume of the variable membrane 200 is varied according to the amount of the off gas discharged from the aeration tank 20 so that the variable membrane 200 maintains a state in contact with the water surface of the aeration tank 20 at the time of initial installation, Only the off-gas discharged from the aeration tank 20 can be trapped between the water surface of the variable membrane 200 and the surface of the treatment water 20 without being introduced into the interior of the variable membrane 200.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but rather are not intended to limit the scope of the technical idea of the present invention.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. It should be interpreted.

10: aeration tank 20: treated water
100: Floating means 101:
102: cap 110: hollow
120: center portion 130:
140: guide line 200: variable membrane
300: discharge means 310: first discharge means
320: second discharge means 330: transfer pipe
400: diaphragm 500: weight
610,620: Desorption device 700: Check valve
810: Wire 820: Vertical frame

Claims (8)

A device installed on the surface of an aeration tank for collecting off gas from treated water of an aeration tank,
A floating member having a hollow section formed therein and having a hollow cross section and having an injection port through which external air is introduced or internal air is discharged and a cap for opening and closing the injection port, ;
A flexible membrane of a stretchable material, the outer end of which is fixed along the inner periphery of the floating means to shield the open center portion of the floating means;
Discharge means connected to the variable membrane to supply air collected at a lower portion of the variable membrane to the outside;
A diaphragm extending downward from the floating means and fixed along the circumference at a lower end of the floating means;
And a plurality of weight bodies fixed to the lower end of the diaphragm. The method according to claim 1,
Wherein the variable membrane is fixed to a position at which the floating means is in contact with the water surface of the aeration tank or an upper portion of the water surface in a state where the floating means is initially installed on the water surface of the aeration tank. The method according to claim 1,
Wherein the variable membrane and the floating means are detachably fixed by means of a detachment means. The method according to claim 1,
Wherein at least a part of the floating means is formed as a corrugated pipe. The method according to claim 1,
Said discharging means comprising:
A first discharging means having a hollow shape and fixed to the deformable film through the deformable film and having a thread on an inner peripheral surface thereof;
A second discharging means having a hollow shape and having a thread formed on an outer peripheral surface thereof and having a lower end threadedly engaged with the first discharging means;
And a transfer pipe for transferring the air discharged through the first discharge unit and the second discharge unit. The method according to claim 1,
Wherein at least one of the floating means and the variable membrane is formed with a folding guide line pressed by a press so as to be relatively thin in thickness as compared with the periphery thereof. The method according to claim 1,
Wherein the variable membrane is provided with a check valve which opens when the pressure of the air trapped between the variable membrane and the water surface becomes higher than a preset pressure and discharges the collected air to the outside, Collection device. The method according to claim 1,
Wherein the one end of the wire is fixed to a plurality of points on the outer surface of the floating means and the other end of the wire is fixed to a vertical frame provided in the aeration tank or the aeration tank. .

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