KR20120067394A - A device for dissolving gas and a apparatus for dissolving oxygen which used it - Google Patents

Abstract

PURPOSE: A gas dissolving unit and an apparatus for dissolving oxygen using thereof are provided to prolong contact time of water with oxygen and generate small sized bubbles, thereby increasing amount of dissolved oxygen underwater. CONSTITUTION: A gas dissolving unit comprises housing, a second hollow, a smokestack hole, an inner pipe(20), a first blind plate, and a second blocking plate(40). In the housing, a first hollow part is formed in a longitudinal direction. A second hollow part is installed inside the housing and is formed in a longitudinal direction. A communicating hole connects a second hollow and the first hollow part on outer circumference. The inner pipe has smaller diameter than the first hollow part. The first blind plate is installed with fixed intervals in order to divide the second hollow part. The second blind plate respectively and closely adheres to outer circumference of the inner tube and inner circumference of the housing.

Description

A device for dissolving gas and a apparatus for dissolving oxygen which used it}

The present invention relates to a gas dissolving unit and an oxygen dissolving apparatus using the same, and more particularly, to a gas dissolving unit capable of increasing the amount of dissolved oxygen in water and an oxygen dissolving apparatus using the same.

Oxygen-dissolving devices are typically used to treat wastewater to increase dissolved oxygen (DO) content in water. It is necessary to keep the amount of dissolved oxygen above a predetermined value not only to preserve the life of fish or other aquatic organisms, but also to suppress the formation of odorants or organic substances.

The biochemical oxygen demand (BOD) is determined by the amount of oxygen used in the biological process of destroying organic matter in water, which means that the higher the biochemical oxygen demand, the greater the amount of organic matter in the water and the greater the amount of dissolved oxygen needed. . Oxygen dissolving devices are extremely useful for increasing the amount of dissolved oxygen, especially when the biochemical oxygen demand is high.

The oxygen dissolving device is a device used to dissolve gases such as oxygen and ozone in a liquid such as wastewater or water in a wastewater treatment plant, a water treatment plant, a water purifier, a nutrient solution for hydroponics, aquaculture farm, etc., which is a liquid such as water or wastewater. It is mainly used for the purpose of improving gas dissolution rate, such as oxygen and ozone.

Such oxygen dissolving device is classified into two types, air diffusion type and mechanical type. The air diffusion oxygen dissolving device has a structure in which air or pure oxygen is introduced into the water through a submersible porous diffusion member or a nozzle, and the mechanical oxygen dissolving device has a structure in which water is dissolved in the atmosphere by disturbing water.

Mechanical oxygen dissolvers are subdivided into surface oxygen dissolvers and turbine oxygen dissolvers. The surface oxygen dissolving device is designed to drastically change the contact area between air and water by introducing air into the water by disturbing water with a submerged or partially submerged impeller. In addition, the turbine oxygen dissolving apparatus uses a rotating impeller installed at a predetermined depth below the surface of the treated water, and a vent pipe is supported coaxially with the impeller to supply external air to the water around the impeller.

Patent Utility Model No. 0305788 discloses a high concentration oxygen water dissolving device. The disclosed oxygen water dissolving device injects purified water into the oxygen tank or oxygen generator at the same time through the oxygen water suction line to be sucked from the circulation pump configured in parallel and flows in the rear end of each oxygen dissolving device. The control valve is installed in order to control the flow rate and pressure.

Registered Utility Model No. 0265964 discloses an oxygen water dissolving device.

The disclosed oxygen water dissolving device is formed with an outer wall having a discharge port on the outside and an upper barrier plate on the inside, and a cover plate having an inlet for supplying water with liquefied oxygen in the center, and an inner wall on the inside and a lower side on the outside. A bottom plate is formed and the top plate of the cover plate is coupled between the bottom plate to be positioned so as to be positioned between the lower plate, the bottom plate coupled to the inlet of the cover plate and installed between the inner wall of the bottom plate and the bottom plate in the form of a whirlpool It has a configuration including a twisting pipe to be sprayed toward, and a swirling wing is installed inclined in the water flow direction and installed in multiple stages inside the upper blocking plate and the lower blocking plate.

In addition, a gas dissolving device is disclosed in Registered Utility Model No. 0297470, Registered Patent No. 0420097, and Registered Utility Model No. 0384685, and a gas dissolving device for wastewater treatment of US Pat. Nos. 4,240,990 and 4,308,221.

The oxygen dissolving device configured as described above does not maximize the dissolution of oxygen by a short contact time with oxygen and a simple turbulence process when dissolving oxygen in the supplied water, thereby stably providing oxygen dissolved water having a high dissolved oxygen content. There is a problem that cannot be obtained.

The present invention has been made to solve the above problems, and an object thereof is to provide a gas dissolving unit and an oxygen dissolving apparatus using the same, which can increase the solubility of oxygen by increasing the contact time of water and oxygen.

Gas dissolving unit according to the present invention for achieving the above object is a housing formed with a first hollow portion in the longitudinal direction, the second hollow portion is formed in the longitudinal direction as being installed in the housing, the outer peripheral surface the second A plurality of communication holes for communicating the hollow portion and the first hollow portion is provided, the inner tube having a diameter smaller than the first hollow portion, and a plurality of first blocking plates installed at predetermined intervals so as to partition the second hollow portion; And a plurality of second blocking plates which are in close contact with the outer circumferential surface of the inner tube and the inner circumferential surface of the housing, respectively, and are alternately installed with the plurality of first blocking plates to partition the first hollow portion.

The plurality of communication holes are formed to be inclined with respect to the radial direction of the inner tube so that vortices are generated in the second hollow portion and the first hollow portion.

The communication holes formed at positions adjacent to each other among the plurality of communication holes are formed in directions facing each other.

Oxygen dissolving apparatus using a gas dissolving unit according to the present invention for achieving the above object is installed in the housing and the housing having the first hollow portion in the longitudinal direction, the second hollow portion is formed in the longitudinal direction and the outer peripheral surface A plurality of communication holes are formed to communicate the second hollow portion and the first hollow portion, and a plurality of first blocking plates installed at predetermined intervals so as to partition the second hollow portion and the inner tube having a diameter smaller than the first hollow portion. And a gas dissolving unit having a plurality of second blocking plates which are in close contact with each other, the outer circumferential surface of the inner tube and the inner circumferential surface of the housing, and alternately installed with the plurality of first blocking plates to partition the first hollow portion. A water supply unit having a supply pipe and a discharge pipe respectively coupled to both ends of the pump, and a pump for supplying water to the supply pipe; It includes an oxygen supply unit for supplying oxygen to the geupgwan.

The plurality of communication holes are formed to be inclined with respect to the radial direction of the inner tube so that vortices are generated in the first hollow portion and the second hollow portion.

The communication holes formed at positions adjacent to each other among the plurality of communication holes are formed in directions facing each other.

According to the gas dissolving unit and the oxygen dissolving apparatus using the same according to the present invention, the solubility of oxygen can be increased by lengthening the contact time between water and oxygen, and the advantage of increasing the solubility of oxygen by generating bubbles of very small size can be obtained. have.

1 is a perspective view showing a gas dissolving unit and an oxygen dissolving apparatus using the same according to the present invention;
2 is a partially cutaway perspective view of the gas dissolution unit according to the present invention;
Figure 3 is a partially enlarged perspective view showing another embodiment of the communication holes formed in the inner tube of the gas dissolution unit according to the present invention,
Figure 4 is a partially enlarged perspective view showing another embodiment of the communication holes formed in the inner tube of the gas dissolution unit according to the present invention,
5 is a cross-sectional view for explaining a path of water moving inside the gas dissolution unit.

Hereinafter, a gas dissolving unit and an oxygen dissolving apparatus using the same according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show a gas dissolution unit 1 according to the invention.

Referring to the drawings, the gas dissolution unit 1 includes a housing 10 provided with a first hollow portion 10a, an inner tube 20 provided with a second hollow portion 20a, and a second hollow portion 20a. The first blocking plate 30 is partitioned, and the second blocking plate 40 is formed to contact the inner surface of the housing 10 and the outer surface of the inner tube 20.

The housing 10 has an internal space and is formed in a pipe shape having a circular cross section. In addition, the housing 10 is formed with an inlet through which fluid can be introduced into one side, and a first hollow portion 10a through which the fluid introduced from the inlet is introduced and into which the inner tube 20 to be described later is inserted is formed. On the other side of the housing 10, an outlet for discharging the fluid passing through the first hollow portion 10a is formed, and flanges 11 and 12 are formed at both ends of the inlet and the outlet.

The housing 10 is preferably formed of metal or ceramics, and stainless steel, which does not generate rust, may be applied to the metal, and new ceramics or fine ceramics may be used. Fine ceramics and the like may be applied.

The inner tube 20 is installed inside the housing 10 and is formed in a pipe shape having a circular cross section. Inside the inner tube 20, a second hollow portion 20a having an inner diameter smaller than the first hollow portion 10a of the housing 10 is formed, so as to allow the second hollow portion 20a to communicate with the outer space. A plurality of communication holes 20b penetrating from the inner circumferential surface toward the outer circumferential surface are formed.

The plurality of communication holes 20b formed in the inner tube 20 allow the fluid moving outward from the second hollow portion 20a of the inner tube 20 to move in the radial direction of the inner tube 20 as shown in FIG. 2. And radially penetrating from the center of the inner tube 20 so as to face the central portion of the second hollow portion 20a from the outside.

The inner tube 20 is formed with a plurality of first blocking plates 30 for dividing the second hollow portion 20a into a plurality of spaces spaced apart from each other at predetermined intervals along the longitudinal direction of the inner tube 20.

The first blocking plates 30 are formed in a disk shape having a predetermined thickness, and are formed in a shape corresponding to the cross-sectional shape of the inner tube 20. The first blocking plates 30 are fluids flowing into the second hollow portion 20a of the inner tube 20 through the housing 10 and the second blocking plate 40 to be described later. It is intended to stay in the first hollow portion 10a for a long time and is in close contact with the inner circumferential surface of the inner tube 20 so as to block the movement of the fluid.

The inner tube 20 has a plurality of second blocking plate 40 installed to surround a portion of the outer peripheral surface is formed to be spaced apart at predetermined intervals along the longitudinal direction of the inner tube 20 is formed so as to cross the first blocking plate (30). have.

The second blocking plates 40 are formed to have the same outer diameter as the inner diameter of the housing 10. That is, when the inner tube 20 is inserted into the housing 10, the inner tube 20 is formed to closely contact the inner circumferential surface of the housing 10 so as to partition the first hollow portion 10a of the housing 10 into a plurality of spaces.

Here, it is preferable that a packing member (not shown) is further provided at the end of the second blocking plate 40 to maintain the airtightness of the inner peripheral surface of the housing 10 and the second blocking plate 40.

Referring to the drawings, the communication holes 20b adjacent to each other in the longitudinal direction of the inner tube 20 of the plurality of communication holes 20b are formed to have different directions from each other.

That is, the communication hole 20b formed around the communication hole 20b formed so as to face the radial direction of the inner tube 20 among the plurality of communication holes 20b is not formed in the radial direction of the inner tube 20. The extension line of each communication hole 20b cross | intersects and is formed.

That is, the communication hole 20b penetrating in the radial direction of the inner tube 20 is formed, and the front and rear directions of the communication hole 20b penetrated in the radial direction of the inner tube 20, that is, on both sides in the longitudinal direction of the inner tube 20. The communication holes 20b are formed to be inclined to the left and right sides to have opposite directions to each other. Thereby, the left communication hole 20b, the center communication hole 20b, and the right communication hole 20b are arrange | positioned sequentially.

As described above, the through-holes of the communication holes 20b are continuously changed in the longitudinal direction of the inner tube 20 so that the fluid moves from the first hollow portion 10a to the second hollow portion 20a. When moving from the second hollow portion 20a to the first hollow portion 10a, all of the fluids passing through the respective communication holes 20b may collide with each other.

On the other hand, the plurality of communication holes (20a) may be formed to penetrate through a curved shape instead of a straight line.

As shown in FIG. 4, the plurality of communication holes 120a are formed to be inclined or bent in a clockwise or counterclockwise direction from the center of the inner tube 120. This is to generate the vortex or turbulence while the fluid passes through the plurality of communication holes (120a).

On the other hand, although not shown in the drawings, the first blocking plate 30 may gradually form a shorter or longer distance between each other from one end of the inner tube 20 to the other end. In this case, it is preferable to gradually form a shorter or longer distance between the second blocking plates 40 so that the second blocking plates 40 are alternately disposed with the first blocking plates 30.

Hereinafter, the oxygen dissolving device 2 using the gas dissolving unit as described above with reference to the accompanying drawings will be described in detail.

1 shows an oxygen dissolving device 2 using a gas dissolving unit 1 according to the invention.

Referring to the drawings, the oxygen dissolving apparatus 2 includes a gas dissolving unit 1, a supply pipe 50 and an exhaust pipe 60, a water supply unit 70, and an oxygen supply unit 80.

The gas dissolving unit 1 includes a housing 10 in which the first hollow portion 10a is provided, an inner tube 20 in which the second hollow portion 20a is provided, and a first blocking portion that divides the second hollow portion 20a. Plates 30 and second blocking plates 40 formed in contact with the inner surface of the housing 10 and the outer surface of the inner tube 20 are provided.

Each component of the gas dissolving unit 1 is the same as described in detail in the foregoing description, and thus redundant description is omitted. In addition, components having the same function as in the above-described drawings are denoted by the same reference numerals.

The supply pipe 50 and the discharge pipe 60 are pipes capable of supplying water to the gas dissolution unit 1, and are coupled to the flanges 11 and 12 formed at both ends of the housing 10.

The supply pipe 50 is provided with a pressure gauge (not shown) capable of measuring the internal pressure. The diameter of the supply pipe 50 is preferably formed at least equal to or smaller than the second hollow portion 20a.

The water supply unit 70 includes a water storage tank (not shown) in which water is stored, and a pump 71 for transferring water from the water storage tank to the supply pipe 50.

The pump 71 has a container 71a and a motor 71b having a receiving space in which water supplied from the water storage tank can be accommodated, and an impeller rotated by the motor 71a in the container 71a. (Not shown) is installed. The water storage tank and the container 71a are connected to each other via a water supply pipe 72.

Oxygen supply unit 80 is to supply oxygen to the receiving space of the container (71a) oxygen storage tank 81, the oxygen storage tank 81 and the oxygen supply tank 82 for connecting the oxygen storage tank 81 and the container 71a and It is further provided with a valve (83) installed in the oxygen supply pipe (82) for adjusting the supply amount of oxygen supplied from the oxygen storage tank (81) to the container (71a).

The oxygen supply pipe 82 is installed between the water supply pipe 72 and the container 71a to supply oxygen, and is installed in the supply pipe 50 between the container 71a and the gas dissolution unit 1 to supply oxygen.

Water supplied from the water storage tank and oxygen supplied from the oxygen supply unit 80 are primarily mixed in the receiving space of the container 71a. In the mixing process by the high speed rotation of the impeller, oxygen is crushed into very fine bubbles. A portion of the oxygen bubbles pulverized into fine bubbles are dissolved in water while bursting, and water containing the undissolved oxygen bubbles is transferred to the supply pipe 50.

Water transferred to the supply pipe 50 by the pump 71 is moved to the second hollow portion 20a of the inner tube 20, and the water passing through the second hollow portion 20a is the first blocking plate 30. It is blocked by) to move to the first hollow portion 10a of the housing 10 through a plurality of communication holes (20b).

Some of the minute oxygen bubbles contained in the water collide with each other along the direction of penetration of the communication holes 20b while passing through the plurality of communication holes 20b, and bubbles are dissolved in water and collide with the inner peripheral surface of the housing 10. Alternatively, bubbles are blown into the water while colliding with the second blocking plate 40.

Water flowing into the first hollow portion 10a of the housing 10 is blocked by the second blocking plate 40 so that the flow thereof is blocked by the second hollow portion 20a through the communication hole 20b of the inner tube 20. As it passes through the plurality of communication holes (20b) and some of the fine oxygen bubbles burst and is dissolved in water.

Water introduced into the second hollow portion 20a is moved to the first hollow portion 10a again through the plurality of communication holes 20b in the second hollow portion 20a of the inner tube 20 as described above. In addition, the process of repeatedly moving from the first hollow portion 10a to the second hollow portion 20a through the plurality of communication holes 20b is performed.

According to the oxygen dissolving apparatus using the gas dissolving unit as described above, the solubility of oxygen can be increased by lengthening the contact time of water and oxygen, and the oxygen solubility can be increased by generating bubbles of very small size.

1: gas dissolving unit 2: oxygen dissolving unit
10 housing 20 inner tube
30: first blocking plate 40: second blocking plate
50: supply pipe 60: discharge pipe
70: water supply unit 80: oxygen supply unit

Claims (6)

A housing in which the first hollow portion is formed in the longitudinal direction;
The second hollow portion is formed in the housing in the longitudinal direction, and a plurality of communication holes communicating the second hollow portion and the first hollow portion are provided on an outer circumferential surface thereof and has a diameter smaller than that of the first hollow portion. Inner tube;
A plurality of first blocking plates installed at predetermined intervals to partition the second hollow portion;
A plurality of second blocking plates which are in close contact with the outer circumferential surface of the inner tube and the inner circumferential surface of the housing, respectively, and are alternately installed with the plurality of first blocking plates to partition the first hollow part. Unit. The method of claim 1,
The plurality of communication holes are gas dissolving unit, characterized in that inclined with respect to the radial direction of the inner tube to generate vortices in the second hollow portion and the first hollow portion. The method of claim 1,
The gas dissolving unit, characterized in that the communication holes formed at positions adjacent to each other of the plurality of communication holes are formed in mutually opposite directions. A housing in which the first hollow part is formed in a longitudinal direction, and a second hollow part is formed in the longitudinal direction as installed in the housing, and a plurality of communication holes communicating with the second hollow part and the first hollow part are formed on an outer circumferential surface thereof; An inner tube having a smaller diameter than the first hollow portion, a plurality of first blocking plates installed at predetermined intervals so as to partition the second hollow portion, and an outer circumferential surface of the inner tube and an inner circumferential surface of the housing, respectively; A gas dissolving unit having a plurality of second blocking plates disposed alternately with the first blocking plates to partition the first hollow portion;
A supply pipe and a discharge pipe respectively coupled to both ends of the housing;
A water supply unit having a pump for supplying water to the supply pipe;
And oxygen supply unit for supplying oxygen to the supply pipe. The method of claim 4, wherein
And the plurality of communication holes are inclined with respect to the radial direction of the inner tube such that vortices are generated in the first hollow part and the second hollow part. The method of claim 4, wherein
The oxygen dissolving apparatus, characterized in that the communication holes formed in the position adjacent to each other of the plurality of communication holes are formed in mutually opposite directions.

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