JPS6118425A - Bubble generating apparatus - Google Patents

Abstract

PURPOSE:To perform oxidation and reduction effectively by providing a gas dissolving part having a gas-liquid mixing part and a screw flow path member, a gas-liquid mixing dissolver having an excess gas separating vessel and a compressor feeding the pressurized gas to the dissolver, etc. CONSTITUTION:When air contg. a large quantity of oxygen of the almost same pressure and water are fed to a gas-liquid introducing cylinder part 111 in a gas- liquid mixing dissolver 100 before feeding raw material to a pressurizing-floatation-separation vessel 200, both the two are mixed and sent into a gas dissolving part B via fluid holes 113a. Since a screw flow path is formed in the inside of an external cylindrical body 112a of the gas dissolving part B, a long flow path is obtained in the short straight distance and the mixing-dissolving process is made long and thereby the mixing-dissolving efficiency is increased. Also, since the respective screw groove members consist of plural streaks, the flow path is divided into small area and useful to the improvement of the mixing-dissolving efficiency.

Description

[Detailed description of the invention] The present invention relates to improvements in bubble generators.

Conventionally, water and air are mixed to generate fine air bubbles, and this gas-liquid mixed water is used for water treatment, and when performing biochemical reactions such as culturing yeast, for example, it is necessary to Oxygen or hydrogen was directly supplied to promote oxidation and oxidation, thereby deodorizing and decolorizing the water. In order to deodorize and decolorize water using this method, a large amount of oxygen or hydrogen must be supplied because water and gas are difficult to mix.
This was a cause of increased costs.

It is an object of the present invention to provide a bubble generator which eliminates the above-mentioned drawbacks and which can be used with a small amount of oxygen or hydrogen supply.

In order to achieve the above object, the configuration of the present invention includes a gas-liquid mixing dissolver 1
00, a liquid supply tank 1 for supplying pressurized gas to the container via a liquid supply pipe 15, and a pressurized gas supply tank 1 for supplying pressurized gas to the gas-liquid mixing dissolver 100 via an air supply t°23. compressor 2
and an oxidizing or reducing auxiliary gas source 3 connected to the middle of the air pipe 23.

The present invention will be explained below based on an embodiment shown in the drawings.

Fig. 1 shows the use of a bubble generator in a sewage treatment system, and as shown in the figure, the bubble generator is used to supply water to a gas-liquid mixer 100 and a nuclear vessel by the operation of a pump 1t1. A water supply tank 1, a near compressor 2 configured to supply air to the gas-liquid mixer 100 via an air supply pipe 2B, and an oxygen cylinder 3 connected in the middle of the air supply pipe 2B. . The water tank 1, the pump 11, and the gas-liquid mixer 100 are connected by a water pipe 15, and there is a strainer 12 between the water pump 1 and the pump 11, or a strainer 12 between the water pump 11 and the pump 11, or a strainer 12 between the water pump 11 and the pump 11. Liquid mixing dissolver 1
A solenoid valve 18 is interposed between the 00 and 00. Further, a relief valve 1-4e4/l#+1f16 is connected in the middle of the water supply 915 between the pump 11 and the electromagnetic valve 18.

A pressure gauge 21 and a solenoid valve 22 are interposed on the downstream side of the air supply pipe 23 to which the oxygen pump 8 is connected. An orifice 31 and a manual valve 32 are connected in the middle of a Ganu tube 38 that connects the oxygen cylinder 3 and the air supply pipe 23.

A gas dissolving water pipe 140 is connected downstream of the gas-liquid mixing dissolver 100, and a check valve 4 and an orifice 5 are provided in the middle of the skeleton 140, and further downstream thereof a pressurized flotation separation phase 200 is provided. is connected to.

The clarified water treated in the pressurized flotation separation tank 200 is sent to the next filtration tank (l118, not shown) through the treated water outlet pipe 225, but a part of the clarified water is branched from the 4 treated water outlet pipes 225. It is formed so that the water is returned and replenished to the water supply tank 1 through a replenishment water pipe 17.

A constant wave of oxygen whose flow rate is regulated by an orifice 31 is constantly fed and mixed into the air supply pipe 28 from the oxygen cylinder 3 .

As shown in FIG. 2, the gas-liquid mixing and dissolving device 100 includes a gas-liquid mixing section A that introduces air and water to generate bubbles;
A gas dissolving section B that subdivides the bubbles in the bubble-mixed water and dissolves the air in the water under pressure, and an excess air separation section 4'so1 that eliminates the pulsation of the liquid and separates and discharges excess air.
It consists of 20.

Thus, in the gas-liquid mixing section A, the liquid introduction tube 15 and the air introduction tube 23 are connected to the tubular gas-liquid introduction cylinder section 111.
are connected.

The gas dissolving section B has an end plate 11B on the downstream side of the gas-liquid mixing section A.
Helical flow path member 11 communicated via fluid hole 113a of
Consists of 2. The spiral channel member 112 has an outer cylindrical body 112a, and a spiral groove member 112b that is concentric with the outer cylindrical body 112a and whose circumferential inner surface and circumferential outer surface are in contact with each other.

The spiral groove member 112b is provided with a plurality of spiral grooves 112d (two in the figure) so that a plurality of spiral channel forces i are formed on the outer periphery in one axis-perpendicular cross section of the cylindrical body 112C.

These spiral grooves 112dfi 1 around the cylindrical body 112c.
It goes around more than once (4@J in the figure). Cylindrical body 112c
Protrusions 112e are provided at both ends. A plurality of helical groove members 112b (eight in the embodiment, first, vJ2, and eighth) are arranged adjacent to each other in series so as to be in contact with the protrusion 112e.

Therefore, the liquid mixing chamber 1 is located on the outer periphery of each of these protrusions 112e.
A space section 14 is formed. These adjacent spiral groove members 112b have spiral thread directions opposite to each other.

A retainer 116 is provided on the most downstream side of the spiral groove member 112b, and the upper surface of the distal end of the cylindrical body 112a is cut out to form a fluid outlet 115, which opens at the bottom of the next surplus air separation re 120.

The surplus air separation tank 120 has a cylindrical side wall 121 provided with a gas dissolving water pipe 140 at the bottom thereof, and an air discharge bulb valve 122b.
It consists of a top wall 122 having an air outlet 122a and a bottom wall 123.

The interior of the cypress 120 is partitioned at approximately the middle in the vertical direction by a partition plate 180 having a large number of holes 131.

Therefore, the gas dissolving water pipe 140
It is connected to the bubble mixing water pipes 281 and 282 of 00. In addition, 124 in FIG. 2 is a water level gauge, and 125 is a pressure detection port.

Next, in FIG. 8, the pressurized flotation separation tank 200 has a first N 210 and a second N 220 each having a vertical cylindrical outer shape, and a waste discharge pipe 240 connected to the upper part of the second cylinder 220.

The first cylinder 210 has a cylindrical shape with a bottom, and a sewage inlet 211a is provided in the lower side wall of the main body 211, and a sewage supply pipe 230 is connected to the inlet. Further, a bubbly mixed water inlet 212a is opened in the flat bottom wall 212, and a first bubbly mixed water introduction pipe 231 is connected to the inlet. The upper end of 1st FG210 is directed outward by more than 90 degrees and less than 180 degrees (150 degrees as shown)
The annular circulation part 21B protrudes at an angle N.

The second cylinder body 220 is a cylindrical body 221 that is covered concentrically with the yjSi cylinder 210 via a gap piece (not shown).
have. The bottom wall 222 of the second cylinder 220 is provided with a treated water outlet 222a, and a plurality of aerated mixed water inlets 222b are provided at equal intervals in the circumferential direction, and the second aerated mixed water is introduced into each of these inlets. Tube 232 is connected.

In the upper part of the second g220, a space is left above the first cylinder 210, which is a dirt flotation separation zone 223 and has a height H.

The waste discharge pipe 240 is connected to the upper end of the second cylinder in order from the top to the top, and has a conical diameter reduced part 241 and an elbow part 2 whose diameter is reduced at the top.
Consists of 42. A solenoid valve 243 that is automatically opened and closed intermittently is connected to the tip of the elbow portion 242, and the filth outlet pipe 240
It is a lla that intermittently discharges the filth that has accumulated inside.

At least one viewing window 250 is provided on the side of the conical diameter reduced part 241 of the active part outlet pipe 240, and is covered with a transparent lid.

The solenoid valves 13, 22 are adjusted so that the pressures in both pipes are approximately the same. Excess water is controlled by a solenoid valve 18 and returned to the original water tank 1 via a return pipe 16.

A hydrogen cylinder may also be used instead of the oxygen cylinder 8.

The operating state will be explained above.

The raw water to be purified is sent from a raw water tank (not shown) or a flocculation device formed to flocculate suspended matter to a pressurized flotation separator F6200 via a raw water pump. Prior to this, in the gas-liquid mixing and dissolving device 10°, the gas-liquid introduction cylinder 11
When air and water containing a large amount of oxygen at the same pressure (approximately 2 kg/dG3) are supplied to 1 and 11, the two are mixed and sent to the gas dissolving section B through the fluid hole 113a. Since a spiral flow path is formed in the outer cylindrical body 112a, a long flow path can be obtained with a short straight line distance, and the mixing and dissolving process is lengthened, thereby improving the mixing and dissolving efficiency and making it possible to downsize the device. In addition, since each spiral groove member consists of a plurality of strips, the flow path is divided into small areas, which helps improve the mixing and dissolving efficiency.Furthermore, in the mixing chamber 114 provided between the plurality of spiral groove members, the overall Mixing and dissolution is promoted.Furthermore,
Since the thread directions of the spiral grooves are opposite to each other in the axial direction, the rotational direction of the fluid is switched to the opposite direction, thereby generating turbulent flow and further improving the mixing and dissolving efficiency. Thus, the # air is forcibly dissolved into the water during the long stroke of the spiral groove 112d. Approximately 20% of the air is dissolved and the remainder remains in the form of bubbles.

This air-mixed dissolved water is introduced into the next surplus air separation tank 120 and passes through the holes 131 of the partition plate 18o, thereby preventing pulsation and preventing bubbles from becoming coarse particles. Then, the gaseous dissolved water flows from the outlet 121a to the orifice F.
The pressurized flotation separation tank 200 (pressure approximately 0.9
#/cdG). There, for example, 30μ
Mixed water with microscopic bubbles was instantly generated, and according to measurement results, the bubbles remained stable for about 2 minutes without disappearing.

On the other hand, surplus air is exhausted to the outside from the upper air outlet 122a. The air outlet 122a (7) ball valve 122b
The tank closes the port 122a due to its own weight, and when the surplus air bearing increases beyond a certain value, the port 122a is opened to let it escape, and the inside of the tank is maintained at a substantially constant pressure (approximately 7 to 9/dG). Further, when the water level in the tank rises too much, the port 122a is closed to prevent water from being discharged.

Next, in the pressurized flotation separation tank 200, the raw water mixed with the flocculated waste from the flocculation device 1 is sent into the first cylinder 210 from the wastewater inlet 211a under pump pressure. At the same time, the bubble mixed water introduction pipe 231
Since water mixed with fine air bubbles is sent through the filtration zone 210, the air bubbles adhere to the filth in the first cylinder 210, increasing the buoyancy of the filth, and separating it from clear water in the flotation separation zone 223. The waste floats to the surface and is stored in the waste discharge pipe 240 above. The clear water from which filth has been removed is then transferred to the first cylinder 210 and the second cylinder 22.
0 from the top to the bottom and flows out from the treated water outlet 222a. During this operation, some of the filth may flow into the treated water, but this filth is refluxed by the reflux section 213. In other words, the waste that has flowed into the treated water side is transferred to the reflux section 21.
It adheres to the lower surface side of 3 where the water force is weak, accumulates, becomes lumpy dirt and increases buoyancy, and the second bubble mixed water inlet pipe 28
Buoyancy is also imparted by the adhesion of air bubbles from 2, and finally the rising speed due to the buoyant force becomes greater than the descending flow speed, and the waste flows back upward and reaches the waste discharge pipe 240.

The dirt floated and accumulated in the flotation separation zone 223 space of the second cylinder 220 and the conical reduced diameter portion 241 is forced out by water pressure when the solenoid valve 24a is intermittently opened. The dirt accumulated in the conical reduced diameter portion 241 serves to prevent water from flowing out from the elbow portion 242 when the pressurized flotation separation tank is tilted or tilted.

According to the results of the experiment, the inclination angle M of the conical diameter reducing portion 241 with respect to the horizontal is 500 to 75° (favorable mechanism 600).
In this case, no filth was generated in the filth outlet pipe 240. Also, the angle N of the reflux part 213 with respect to the first cylinder outer circumferential surface is
The appropriate angle was 90' to 165° (standard 150').

During the above operation, the water supply tank 1 is successively replenished with clear water through the supply water pipe 17, and a constant amount of water is always secured in the tank.

The manual valve 32 of the gas pipe 38 is closed when there is no need to replenish oxygen or hydrogen or when replacing the gas cylinder.

The fourth illustration shows a spiral groove member 115b of another embodiment, in which the number of channels in one axial section is increased to increase the total channel area. That is, one or more (eight as shown) inner cylindrical bodies 116c are fitted inside the outer cylindrical body 112a.

117c, 118c, and these 116
It consists of a cylindrical body 115C fitted concentrically inside the cylindrical body 0.

Spiral grooves 115d and 116d are formed on the outer circumferential surface of each part.
, 117d, and 118d are provided. The thread directions of the spiral grooves are opposite to each other in the radial direction.

In addition, groove 1 of the cylinder body 115C and the minimum internal pH cylinder body 116C.
16 d (4-thread thread in case of d illustration, intermediate inner cylindrical body 117
C has a 6-thread thread, and the wet inner cylinder 118C has an 8-thread thread.

Note that the spiral groove may be provided on the inner circumferential surface of the inner cylindrical body or the outer cylindrical body. In this case, the cylindrical body is not provided with a spiral groove. Some of the inner cylindrical bodies may not be provided with a spiral tube but may be provided with a flow path such as a groove along the axial direction, or may be provided with a flow path at all. That is, it is sufficient that the spiral surface is provided on the outer circumferential surface or the inner circumferential surface of at least one of the inner cylindrical body and the cylindrical body.

In the gas-liquid mixing dissolver 100, the gas-liquid mixing section A,
n￥ Solution part B jd Their axes may be oriented vertically. In this case, the upper end of the melting section B is connected to the bottom wall 123 of the excess air discharge tank 120. The pressure of gas and liquid is about 4-1
A range of 0 kq to G is suitable.

Instead of the child valve 322b, a pressure regulating valve for an oil chamber or the like may also be used. In addition, a device in which liquid and gas are mixed by a nozzle, such as the mixing portion A, is also applicable.

In the gas-liquid mixer 100, gas is dissolved in a short time, and the tank can be small. As a gaseous solution, a bubble mixture containing a large amount of oxygen is instantly generated, and the bubbles are stably maintained for a long time, allowing oxygen to permeate into the water well, promoting oxidation debris, and improving water purification. It is possible to significantly improve efficiency.

The pressurized flotation separation system 200 has a compact structure and saves water by preventing water from being mixed into the discharged waste, and furthermore, by the action of the reflux section, even waste that is difficult to float can be efficiently floated. Therefore, the separation and removal of filth is reliably performed, improving the water purification effect. ! In addition, a sewage and bubble mixed water inlet 212 is provided at the bottom of the first vertical cylinder 210.
a, an upward flow occurs in the first Th 210 and dirt does not accumulate at the bottom.

The bubble generator of the present invention is widely used in the sewage treatment apparatus shown in the above embodiments, as well as in other industrial production departments, processing departments, medical hygiene departments, etc. that utilize gas-liquid mixed water.

Since the invention is constructed as described above, excellent mixing is achieved by mixing oxygen or hydrogen in the form of bubbles in the execution water, and even with a small amount of oxygen or hydrogen, highly efficient oxidation or oxidation can be achieved. The original action is carried out to promote deodorization and decolorization. As a result, the amount of oxygen or hydrogen replenishment is significantly reduced compared to the conventional method, making it possible to significantly reduce production costs.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the f'c system connected to the pressurized flotation separation tank j showing an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of the gas-liquid mixing dissolver, and Fig. 3 is the pressurized flotation system. Cross section of separation tank, 41st aim
FIG. 7 is a cross-sectional view of another embodiment of the spiral flow path member. 1... & water f'L 2... Near compressor, 8
... Oxygen cylinder, 4... Check valve, 5... Orifice, 100... Gas-liquid mixing dissolver, A... Gas-liquid mixing section, B... Gas dissolving section, 111...・Gas/liquid introduction cylinder part, 1
DESCRIPTION OF SYMBOLS 12... Spiral channel member, 120... Excess air separation tank, 200... Pressure flotation separation tank, 210... First cylinder,
220...Second applicant: YK Niska Co., Ltd. Patent attorney Keiichi Nishi, Shinpei Inukai, Ishimaya Mibuya 9mm○

Claims (8)

[Claims] (1) Gas-liquid mixing section A that introduces and mixes gas and liquid, and gas dissolving section B that has a spiral flow path member connected to the downstream side of the gas-liquid mixing section to form a spiral flow path. , a gas-liquid mixing dissolver 100 having an excess gas separation tank 120 which is open at the end of the gas dissolving part and separates and discharges excess gas; A liquid supply tank 1 , a compressor 2 configured to supply pressurized gas to the gas-liquid mixer 100 via an air supply pipe 23 , and other oxidizing or cyclic elements connected in the middle of the air supply pipe 23 . A bubble generator characterized in that it has an auxiliary gas source 3. (2) The bubble generator according to claim (1), wherein the spiral channel member includes an outer cylindrical body and a spiral groove member fitted concentrically inside the outer cylindrical body. (3) The bubble generating device according to claim (2), wherein the spiral groove member has a spiral groove provided on the outer circumferential surface of a cylindrical body. (4) The spiral groove member includes one or more inner cylindrical bodies and a cylindrical body concentrically fitted inside the inner cylindrical body, and the outer circumference of at least one of the inner cylindrical bodies and the cylindrical bodies. Claim No.
2) The bubble generator described in section 2). (5) The spiral groove member is provided with a protrusion such that a fluid mixing chamber is formed between the spiral groove members when a plurality of the spiral groove members are arranged adjacent to each other in the axial direction. Chapter (3)
or (4). (6) A plurality of spiral groove members are arranged in series in the axial direction, and the screw directions of the spiral grooves are opposite to each other in the axial direction.
or (4). (7) The bubble generating device according to claim (4), wherein the thread directions of the spiral grooves are opposite to each other in the radial direction. (8) The spiral groove member has a plurality of spiral grooves on at least one spiral wrapping surface so that a plurality of channels are formed in one axis-perpendicular cross section. The bubble generator according to item (3) or item (4).