JP3306440B2 - Gas-liquid mixed bubble generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for effectively producing suspended and suspended particles in aeration and water treatment, a fine gas-liquid mixed bubble generator in an oil flotation device, and dust and gas mixed in flue gas. As for the gas-liquid mixed bubble generating device which can be purified, its application technical field can be applied to, for example, purification of industrial wastewater and industrial flue gas, purification of rivers and lakes, and purification of hot water (or water) in various bathtubs. Things.

[0002]

TECHNICAL FIELD OF THE INVENTION

2. Description of the Related Art Conventionally, aeration method bubbles are disclosed in Japanese Patent No. 257
As disclosed in No. 3899 “Purification devices for rivers, lakes and marshes, and oil / water separation devices”, air was discharged by a compressor. Commonly used, for example,
Most of the flotation processing methods such as 112321 “Gas-liquid mixing apparatus and microbubble generator using the same” or Japanese Utility Model Laid-Open No. 3-174292 “Floating apparatus” use a pressure flotation method.

[0003]

Problems to be Solved by the Invention Patent No. 2573899
When air is discharged from a compressor, as in the issue No. “Purification devices for rivers, lakes and marshes and oil-water separation devices”, the contact area between the liquid and the bubbles is small due to the large bubbles, and the dissolved oxygen efficiency is extremely poor. Not enough purification.

Further, in the case of the above-mentioned pressurized flotation device, fine bubbles are required. However, a compressor, a pressurized tank, and a differential pressure valve are required to obtain these fine bubbles, which is difficult to adjust. The size of the device has been increased, and the location of the mobile installation has been limited.

[0005] Furthermore, the nozzle spray method occupies the majority of the methods used as a technology for treating flue gas. This is because a blower or a fan is used as a blower. However, this method is not very effective for gases, even if the suspended particles can be almost completely removed.

[0006] In a small-scale combustion furnace, a conventional method is used.
The equipment is large and unsuitable. The present invention relates to a microbubble generating device including a nozzle, a diffuser. By using the Munro effect and its turbulence, cavitation, etc. in multiple stages, the device is compact and efficiently removes fine bubbles easily from small to large volumes without using compressors, pressurized tanks and differential pressure valves. It is intended to provide a device that can be generated.

Depending on the location, the purpose of use, and the amount of purification, fine bubbles can be generated by the apparatus of the present invention alone by using the pressure and amount of water supply and industrial water without using a pump.

[0008] A nozzle is provided inside the sealed discharge pipe,
By injecting the pressurized water with this nozzle, a negative pressure is generated around the nozzle. If a smoke exhaust pipe is connected to the negative pressure generating section, that is, the nozzle discharge section, and at this time, various neutralizing agents (neutral, alkali, acidic) are supplied to the water to be pumped, the negative pressure can be reduced. The pressure causes the flue gas to be sucked from the flue gas pipe. At this time, the jet water and the gas are rapidly stirred and mixed in the diffuser, the diffuser outlet, and the piping, so that dust, oxides, and the like are dissolved in the water together with fine bubbles, and the liquid is dissolved in the dissolution tank or the water. By flowing into the upper open tank of the treatment plant, the gas containing pollutants is treated and released to the atmosphere.

[0009] If necessary, the nozzle and the diffuser may be incorporated in a multi-stage or multi-stage to form a liquid,
It can cope with purification of both gases.

[0010] In the case of using powder or a water-soluble drug in the above-mentioned purifying device, a drug supply pump is required. By using this device, the tip of the pipe drawn from the negative pressure generating section can be removed. By contacting the powder and the water-soluble drug tank, the powder and the water-soluble drug can be self-supplied using negative pressure.

Therefore, the object of the present invention is to:
Since there is no need for a compressor, a pressurized tank, and a differential pressure valve, operability is simplified as compared with the conventional levitation device, and various problems such as an installation place and a space can be solved. Further, with regard to the flue gas of an incinerator, an object of the present invention is to provide a gas / liquid mixed bubble generating apparatus capable of purifying the flue gas without coming into contact with the atmosphere.

[0012]

In order to achieve the above object, a discharge pipe and a diffuser are provided in the discharge pipe, and a rear part of a discharge part of the diffuser and an outer periphery of the diffuser and the diffuser are provided. A gas-liquid mixing pipe is provided in a gap between the inner circumference of the discharge pipe and a V-shaped cut formed at the end of the diffuser.

Further, a plurality of diffusers may be provided in the discharge pipe.

Further, in order to promote further refinement of the gas-liquid mixed bubbles, the discharge pipe has a V-shaped cut at its tip and an impact plate at a position slightly separated from the tip.

[0015] Further, regarding the smoke exhaust, a discharge pipe, a nozzle at the inner periphery of the discharge pipe, and a diffuser are further provided in front of the discharge pipe, and a smoke discharge pipe is connected near the discharge part of the nozzle. A diffuser for a discharge pipe is provided in front of the discharge part of the nozzle, and a V-shaped cut is provided at the end of the diffuser, while a neutralizing agent and other chemicals are fed from the rear part of the discharge pipe together with water supply. It is something to do.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A diffuser is provided inside a raw water supply pump or a discharge pipe drawn from a water supply or industrial water, and a gas-liquid mixing pipe is disposed near a discharge portion of the diffuser and a front part of the discharge pipe. In which a V-shaped cut portion is formed. Further, regarding smoke exhaust, a nozzle is installed inside the inner periphery of the discharge pipe drawn from the raw water supply pump or water supply, industrial water, and a smoke exhaust pipe is continuously installed near the discharge part of this nozzle, and the nozzle is further installed. A discharge pipe diffuser is provided in the front part of the discharge part, and a water absorption pipe is provided near the discharge part of the diffuser, and a V-shaped cut is provided at the diffuser discharge end, while the discharge pipe is provided at a middle position from the rear part. The sump was pumped.

[0017]

[Embodiment 1] The main structure of a gas-liquid mixed bubble generator a of the present invention is that a diffuser is connected to a raw water supply pump or a raw water supply pipe supplied at a predetermined pressure from water supply or industrial water, and a diffuser is provided at the inner diameter of the discharge pipe. The diffuser is provided with a gas-liquid mixing pipe near the discharge section of the diffuser, and a V-shaped cut section formed at the front of the discharge pipe.

That is, a predetermined pressure (1.5 kg / cm ² to 1
Raw water supplied at 0 kg / cm ² ) is first sent from a discharge pipe 1 to a diffuser 2 mounted inside the discharge pipe. Since the diffuser 2 is designed to have a small inner diameter at the inlet 3 and the inner diameter of the internal passage 4 is smaller than the inner diameter of the discharge pipe 1, the diffuser 2 has a predetermined pressure (1.5 kg / cm).
The speed of the raw water supplied at ^{2 to} 10 kg / cm ² ) is accelerated in the process of passing through the inside of the diffuser 2.

Further, a gas-liquid mixing pipe 6 is provided in a gap 5 between the outer diameter of the diffuser 2 and the inner diameter of the discharge pipe 1, and a plurality of V-shaped cuts 8 are formed at a front end 7 of the diffuser 2. It is provided. For this reason, since the distal end of the diffuser 2 is relatively small in diameter compared to the inner diameter of the discharge pipe 1, the flow velocity of the raw water once supplied at an increased flow velocity becomes turbulent at the distal end of the diffuser 2. Negative pressure is generated in the gap 5 between the outer diameter of the diffuser 2 and the inner diameter of the discharge pipe 1. The air and the circulating water are absorbed by the gas-liquid mixing pipe 6 formed by joining the air pipe 10 and the circulating water pipe 11 by the suction effect of the negative pressure. The air pipe 10 is provided with an adjusting cock 12 that can adjust the amount of supplied air at any time so that air is not excessively sucked. In order to efficiently generate fine bubbles, the higher the pressure, the more the tomographic effect is realized.
For example, when the pressure exceeds 10 kg / cm ² , the generation of fine bubbles is recognized in a tomographic manner. This includes pressure, flow rate,
This is probably because various effects act synergistically in the flow such as flow rate, negative pressure, Munro effect, rapid mixing and stirring.

Therefore, circulating water containing appropriate air flows from the gas-liquid mixing pipe 9 in the gap between the outer circumference of the diffuser 2 and the inner circumference of the discharge pipe. When circulating water containing appropriate air flows into this gap and first collides with the outer periphery of the diffuser 2, the air bubbles are once cut off here, and the outer periphery of the diffuser 2 and the inner periphery of the discharge pipe 1 are separated. The mixing and agitation by the turbulent flow generated in the gaps causes finer bubbles to be generated. The bubbles are caused to flow at once by the turbulent flow generated at the tip of the diffuser 2 and the Munro effect at the tip 7 of the diffuser 2 at the V-shaped cut 8. Due to the accelerated discharge, the bubbles are made into finer bubbles at a stretch due to the mixing and stirring generated in the gap between the outer periphery of the diffuser 2 and the inner periphery of the discharge pipe 1. Here, the Munro effect is known to increase the destructive power at the time of explosion when a conical hole is made in an explosive mass, for example. This phenomenon is called the Munro effect. The V-shaped cut of the present invention applies the Munro effect in a fluid that is pumped at high speed.

The turbulence becomes more remarkable by forming an infinite number of irregularities on the outer periphery of the diffuser 2 in the gap region so as to further accelerate the generation of the turbulence. From the distal end 7 of the diffuser 2 to the distal end of the discharge pipe at a predetermined distance from the distal end 7, the Munro effect provided in the diffuser, the outer circumference of the diffuser 2 and the inner circumference of the discharge pipe 1 in the flow in the discharge pipe. Due to the synergistic effect of the turbulence generated in the gap, the bubbles advance while being fragmented, and are sent in the direction of a further discharge pipe V-shaped cut 13 provided at the tip of the discharge pipe 1. The V-shaped cut 13 is provided at the tip of the discharge pipe, and the collision plate 14 is provided at a distance from the tip 15 of the discharge pipe. A large number of fine bubbles further collide with the impact plate 14 in a state where the flow velocity is increased by the Munro effect in the V-shaped cut 13, thereby forming finer bubbles, that is, ultra-fine bubbles in units of several to several tens of microns. It is intended to be released.
As shown in FIGS. 4 and 5, if the inner diameter of the discharge pipe 1 is increased and the number of the diffusers 2 is set to a plurality corresponding to the diameter, the negative pressure, the intake air amount, the processing discharge amount, It is of course possible to significantly increase the amount of generation.

FIG. 6 shows an example in which an example of the use of the above-described ultrafine bubble generating apparatus is applied to purification of water in a bathtub by using the bathtub for a general household. That is, the water in the bathtub 25 is connected to the circulating water pipe 11 constituting the gas-liquid mixing pipe 9 of the ultrafine bubble generator which circulates the water through the pump 21, and the discharge pipe 1 is connected to the water tap 23 through the hose 22. And the tip of the discharge pipe 1 is returned to the bathtub 25 via the water supply hose 24, so that the water (or hot water) in the bathtub is
The water containing a large amount of ultrafine bubbles discharged from the water supply hose 24 at the distal end of the discharge pipe 1 diffuses throughout the bathtub.

When the water (or hot water) in the bathtub is in the already used bathtub (or hot water), the present invention is effective against human dirt, fat, hair and other stains after bathing. Ultra-fine bubbles discharged from the micro-bubble generator float on the surface of the bathtub water by adhering to the surface of the dirt innumerably, and if the dirt that has floated is scooped, the water (or hot water) inside the bathtub can be removed. Has a transparency that is so clean that it does not seem to be used water.

[0024]

[Embodiment 2] The main structure of a gas-liquid mixed bubble generating apparatus b of the present invention comprises a discharge pipe 31 and a nozzle
2, a smoke exhaust pipe 34 is continuously provided in the vicinity of a negative pressure generating part of the discharge part 33 of the nozzle 32, and a discharge pipe diffuser 35 is further provided in front of the discharge part 33 of the nozzle 32. A V-shaped cut 37 is provided at the front end portion of the diffuser 36, and a neutralizing agent is fed from the rear portion of the discharge pipe 31 together with water supply.

As an example of using the gas-liquid mixed bubble generating apparatus b, an example in which the apparatus of the present invention is directly connected to a smoke exhaust pipe of a combustion furnace will be described below with reference to FIG. That is, since the smoke exhaust pipe 34 of the combustion furnace 38 is connected to the negative pressure generation section of the discharge section 33, ash, dust oxide,
The gas is sucked by the negative pressure generated in the front part of the discharge part 33 of the nozzle 32, and the jet water and ash, dust, oxide, gas, etc. jetted from the nozzle 32 are diffused by the diffuser 3.
5 and at the end of the discharge part, due to the Munro effect in the V-shaped cut 37 provided in the discharge part of the diffuser, rapidly agitating and mixing, and fine bubbles or ash or dust oxide Is discharged from the discharge pipe as a dissolved substance to which fine bubbles adhere.

The water supplied from the discharge pipe 33 is mixed with various neutralizing agents depending on the properties of ash, dust oxide and gas discharged in the incinerator 38. For example, incinerator 3
When it is an oxide discharged from 8, it is desirable that a neutralizing agent such as a strong alkali is appropriately mixed in as a neutralizing agent to be neutralized at the time of discharge into the discharge port of the discharge pipe. . Further, together with these neutralizing agents, it is also possible to add a polymer flocculant together with water supplied to the discharge pipe for the purpose of trapping and coagulating viscous and suspended matter in the water.

Most of the ash, dust, oxides, gases, etc., which are discharged from the discharge port of the discharge pipe 33 and open on the upper surface of the tank 39, are suspended in a state where a large number of fine bubbles are almost neutralized together with many fine bubbles. ). This is removed by a scraper, and the water in the tank 39 is then sent to the treatment plant 40, where the coagulant,
An appropriate chemical storage tank 41, such as a neutralizing agent, is supplied into a treatment plant 40 via a pump 42, where the collected sludge 4
3 and Shimizu are separated. Here, the separated collected sludge is collected by a sludge collection pipe 43, while the fresh water is collected by a reflux pipe 4.
5 is supplied to the gas-liquid mixed bubble generator b by obtaining a predetermined pressure via the pump 42.

Therefore, regarding the flue gas of the incinerator, the flue gas can be purified without coming into contact with the atmosphere. In addition,
Discharge pipe 31 used for levitation processing, diffuser 35
The pipe diameter, the pump pressure, and the flow velocity further change depending on the required amount of generated fine bubbles and the amount of generated smoke. However, in this case, the pump pressure is 2 kg / cm ³ or more, and the higher the pressure, the higher the generation efficiency. Further, as for the smoke exhaust treatment of the incinerator 38, the larger the negative pressure on the suction side, the larger the amount. Therefore, the higher the discharge pressure of the pump 42, the better.
Depending on the shapes of the diffuser 35 and the nozzle 32, there is a considerable difference in the rate of generation of negative pressure. This is because during the process of water flowing into the diffuser, at the time of internal passage, and how turbulence occurs at the discharge pressure, the energy exchange efficiency (pressure → flow rate) has been tested and found to increase or decrease several times are doing.

[0029]

According to the first aspect of the present invention, there is provided a gas-liquid mixed bubble generator.
A discharge pipe, a diffuser is provided inside the discharge pipe, and a gas-liquid mixing pipe is disposed in a gap between an outer periphery of the diffuser and an inner circumference of the discharge pipe at a rear part of a discharge part of the diffuser. At the same time, V
Since the character cut is formed, ultrafine bubbles can be easily obtained only by feeding the supply water while adopting an extremely simple structure. The operability is simplified as compared with the conventional levitation device, and various problems such as an installation place and a space can be solved. As before, the compressor, pressurized tank, and differential pressure valve needed to obtain microbubbles are no longer required in the present invention, and the operability is simplified as compared to the floating device, and the installation location, Problems such as space can be solved very inexpensively. In the gas-liquid mixed bubble generating apparatus according to the second aspect, since a plurality of diffusers are provided in the discharge pipe, a large amount of ultrafine bubbles corresponding to the number of diffusers can be obtained. In the gas-liquid mixed bubble generating apparatus according to the third aspect, the discharge pipe has a V-shaped cut at its tip and an impact plate at a position slightly apart from the tip, so that the bubbles can be further subdivided. At the same time, there is an effect that the release of the ultrafine bubbles thus formed can be diffused throughout the septic tank. In the gas-liquid mixed bubble generating apparatus, a discharge pipe, a nozzle at an inner peripheral portion of the discharge pipe, and a diffuser are further provided at a front portion thereof, and a smoke exhaust pipe is provided near a discharge portion of the nozzle. A diffuser for a discharge pipe is provided in the front of the discharge part of the nozzle, and a V-shaped cut is provided at the end of the diffuser. Therefore, regarding the flue gas of the incinerator, the flue gas can be purified in a closed path without coming into contact with the atmosphere, so that the treatment of the flue gas can be easily detoxified and released to the atmosphere.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a gas-liquid mixed bubble generator.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 is an enlarged sectional view of a main part.

FIG. 5 is a sectional view taken along the line BB in FIG. 4;

FIG. 6 is an explanatory view showing an example of use of a gas-liquid mixed bubble generation device.

FIG. 7 is a cross-sectional view schematically showing a gas-liquid mixed bubble generator for smoke exhaust.

FIG. 8 is a sectional view taken along the line CC in FIG. 5;

FIG. 9 is an explanatory view showing an example used in the smoke exhaust treatment of an incinerator.

[Explanation of symbols]

 1. . . Discharge pipe 2. . . Diffuser 3. . . 3. Diffuser entrance . Internal route 5. . . Gap 6. . . 6. Gas-liquid mixing tube . . Tip 8. . . V-shaped cut 10. . Air tube 11. . Circulating water pipe 12. . Adjustment cock 13. . V-shaped discharge pipe cut 14. . Impact plate 15. . 21. Discharge pipe tip . Bump 22. . Hose 23. . Tap faucet 24. . Water supply hose 25. . Bathtub 31. . Discharge pipe 32. . Nozzle 33. . Discharge unit 34. . Smoke exhaust pipe 35. . Diffuser 37. . V-shaped cut 38. . Combustion furnace 39. . Tank 40. . Processing plant 41. . Drugs 42. . Pump 43. . Sludge recovery pipe 44. . Pressure pump 45. . Reflux tube

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C02F 1/24 B01F 3 / 04,5 / 04 C02F 3/22

Claims (4)

(57) [Claims] 1. A discharge pipe, and a diffuser is provided in the discharge pipe, and a gas-liquid mixture is provided in a gap between an outer circumference of the diffuser and an inner circumference of the discharge pipe at a rear part of a discharge part of the diffuser. A gas-liquid mixed bubble generating apparatus, wherein a pipe is provided and a V-shaped cut is formed at the tip of the diffuser. 2. A gas-liquid mixed bubble generating apparatus according to claim 1, wherein a plurality of diffusers are provided in the discharge pipe. 3. The gas-liquid mixed bubble generating apparatus according to claim 1, wherein the discharge pipe has a V-shaped cut formed at its tip and an impact plate formed at a position slightly apart from the tip. 4. A discharge pipe, a nozzle at an inner peripheral portion of the discharge pipe, and a diffuser at a front portion thereof, and a smoke exhaust pipe is provided continuously near a discharge portion of the nozzle. A diffuser for discharge pipe is installed in front of the discharge part of the nozzle,
A V-shaped cut is provided at an end of the diffuser, and a neutralizing agent is fed under pressure along with water supply from a rear portion of the discharge pipe.