KR20100082101A - Refreshing system absorption liquid using micro-bubble - Google Patents

Abstract

PURPOSE: An absorption liquid recycling device is provided to prevent a foul smell by processing a gas phase contaminants, and to reduce costs by extending a lifespan of the absorption liquid applied in a washing-type prevention facility. CONSTITUTION: An absorption liquid recycling device includes the following: an inflow tank(22) with a first processed water inlet(21) receiving absorption liquid in which dust is removed; a separation tank(23) with a second processed water outlet(26) and is connected to the next of the inflow tank; a micro-bubble generating jacket(24) mounted to the bottom of the separation tank; a re-circulation pump(27) circulating a part of the adsorption liquid to a minute bubble generating device(28); and an ozone generating device(31) connected to the minute bubble generating device.

Description

Absorption liquid recycling device for harmful gas dust collecting facility using micro bubble {Refreshing system absorption liquid using Micro-bubble}

The present invention relates to an absorbent liquid recycling apparatus for harmful gas dust collecting facilities using micro bubbles, and more specifically, to remove dust and gaseous contaminants of harmful gases contained in the absorbent liquid using micro bubbles generated by ozone, and to recycle the absorbent liquid. The present invention relates to an absorbent liquid recycling apparatus for hazardous gas dust collecting facilities using microbubbles.

Conventional harmful gas dust collectors, that is, flush prevention facilities, which are applied to various industrial sites include wet electric dust collectors and scrubbers.

Referring to Figure 1 attached to the configuration and operation of the scrubber, one of the conventional flushing prevention facilities as follows.

An absorbent liquid pump (3) for pumping the contaminated air inlet (1) formed on one side of the scrubber, the water tank (2) below it, and the absorbent liquid in the water tank (2) to the upper end of the scrubber through the absorbent liquid pipe (6). And, the absorbent liquid injection nozzle 7 for spraying the absorbent liquid pumped from the pump (3) downward from the inside of the scrubber, and the through-hole body (4) arranged in two stages at a predetermined interval below the absorbent liquid injection nozzle, Porous polling (5) accumulated on the through-hole (4), the demister (8) mounted on the upper side of the absorbing liquid injection nozzle, and the clean gas formed at the top of the scrubber and filtered clean gas discharged to the outside It consists of an outlet 9.

Such flushing facilities have the advantage of removing dust and gaseous contaminants generated at various industrial sites at the same time, thus injecting molten metal and casting process in foundry cores that generate a lot of casting dust and odors (phenols, amines, etc.). It is widely applied as a post-treatment facility such as process and demolding process.

Referring to the operation flow for removing contaminants of a scrubber, which is one of the conventional flush prevention facilities, when the contaminated air enters the scrubber through the inlet port 1 and moves to the outlet port 9 through the through hole 4, The absorbent liquid stored in 2) is moved along the pipe 6 by the driving of the pump 3 and then injected into the contaminated air through the injection nozzle 7 to contact the dust and gaseous contaminants contained in the contaminated air. .

At this time, the porous polling (5) is put in order to ensure the contact time of the air and the absorbent liquid, the air and the absorbent liquid has a longer contact time by changing the flow path along the empty space of the polling (5).

In addition, in order to increase the removal efficiency of contaminants, the through-hole 4 and the polling 5 are installed in multiple stages, and the demister 8 includes fine particles of the absorbent liquid generated by the spray nozzles 7. Prevents the release of gaseous contaminants to the outside with clean air removed.

However, when the absorbent liquid is used for a long time, the spray nozzle is clogged as the dust concentration increases, so that it is difficult to properly absorb the absorbent liquid, so that the removal efficiency of dust and gaseous contaminants decreases. The efficiency is lowered, which causes disadvantages in that the absorbent liquid must be disposed of periodically (per month).

In addition, the absorbent liquid, that is, the waste liquid has its own waste water treatment plant, the transfer of water to the waste water treatment plant for processing periodically has a disadvantage of increasing the water and waste water treatment costs due to a short replacement cycle, in particular, if there is no waste water treatment plant pay In this case, the absorbent solution is used for a long time (3 to 6 months) to reduce the cost, thereby reducing the efficiency of removing dust and gaseous pollutants, thereby increasing the odor complaints of local residents.

In view of this problem, the applicant of the present application transfers the contaminated absorbent liquid from the flushing prevention facility to the dust removal device to filter the dust, and transfers it to the gaseous pollutant removal device to decompose and remove the gaseous contaminants contained in the absorbent liquid. We have already filed an application (application number: 10-2008-44830) for an absorbent regeneration device that can recycle and recycle.

The present invention is to facilitate the removal of gaseous contaminants from the dust-absorbed absorbent liquid, the microbubble of the average diameter of about 30㎛ generated by ozone gaseous contaminants in the absorbent liquid of the first dust removal state (Micro- It is an object of the present invention to provide an absorbent liquid recycling apparatus for harmful gas dust collecting facilities using micro bubbles, which can be more easily removed using bubbles.

In the present invention for achieving the above object, in the absorbent liquid recycling apparatus for harmful gas dust collecting facility using a micro-bubble comprising a dust removal device to remove dust from the absorbent liquid used in the harmful gas dust collecting facility,

An inlet tank having a primary treated water inlet port through which an absorbent liquid from which dust is first removed from the dust removal device is introduced; A separation tank integrally connected directly to the inflow tank and having a secondary treatment water outlet at a lower end thereof; A micro-bubble generating jacket mounted on the bottom surface of the separation tank; A recirculation pump for pumping a part of the absorbent liquid in the separation tank and circulating the microbubble generating device; An ozone generator connected to the microbubble generator to supply ozone gas; In the microbubble generator, the ozone from the ozone generator and the absorbent liquid from the recirculation pump are mixed and supplied to the microbubble generating jacket. Provided is an absorbent liquid recycling apparatus for hazardous gas dust collecting facilities using microbubbles, characterized in that it is generated.

In a preferred embodiment, the micro-bubble generating device comprises: a primary mixing chamber having a recycling water inlet for connecting to the ozone generating device at one top; A secondary mixing chamber and a tertiary mixing chamber connected in continuous communication with the primary mixing chamber; A primary connecting nozzle arranged between the primary mixing chamber and the secondary mixing chamber; A secondary nozzle arranged between the secondary mixing chamber and the tertiary mixing chamber; A microbubble mixed solution outlet formed at a lower end of the third mixing chamber and connected to the microbubble generating jacket; Characterized in that consisting of.

In particular, the microbubble ejected from the microbubble generating jacket is characterized in that the ozone microbubble having an average diameter of about 30㎛.

In addition, the upper end of the separation tank is characterized in that the skimmer is a kind of floating fence.

Through the above problem solving means, the present invention can provide the following effects.

According to the present invention, the gaseous contaminants in the dust-absorbed liquid are removed more easily by using a micro-bubble having an average diameter of about 30 μm generated by ozone, thereby using an absorbent liquid applied to a flushing prevention facility. By extending the period (from 1 month to 4 months), cost reduction and proper treatment of gaseous pollutants can provide tangible and intangible effects to prevent odor complaints in advance.

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

First, in order to help the understanding of the present invention, the dust removal device and the gaseous pollutant removal device are connected to the previously applied scrubber, and the configuration and operation of the dust removal device will be described with reference to FIGS. 2 and 3. Is the same as

Dust removal apparatus 10 used in the flushing prevention facility to remove dust contained in the contaminated absorbent liquid is connected to the water tank 2 of the scrubber, and removes gaseous contaminants to remove gaseous contaminants contained in the absorbent liquid. The device 20 is arranged in connection with the dust removal device 10.

The dust removal device 10 has a first inlet 10a through which the contaminated absorbent liquid flows in the scrubber and a first outlet 10b for discharging the filtered absorbent liquid, respectively, at upper and lower ends thereof, and filters dust therein. The inner filtration member 11 and the support means 13 for supporting the filtration member 11 is mounted.

The absorbent liquid introduced through the first inlet 10a removes dust and other suspended substances by the filtering member 11 made of a material having excellent acid resistance and alkali resistance, and the filtering member 11 has a continuous replacement. In order to be wound around the roller 12 and the like.

The filtration member 11 is preferably installed in contact with all side walls of the first chamber 10 in order to increase the dust removal efficiency, plate-type formed with a plurality of holes so that the filtration member 11 is not stretched The support means 13 is installed.

In order to remove moisture from the sludge filtered by the filtration member 11, a pair of compression rolls 16 are installed at opposite positions of the roller 12, and the filtration member 11 is the compression roll 16. Due to the operation of the waste filter member 19 is configured to be moved to the outside of the first chamber (10).

The sludge dropped while the filtration member 11 is moved is transferred to the sludge storage 18 for sludge storage by the sludge transport apparatus 17.

On the other hand, the lower side of the support means 13 is provided with a flow path forming means 14 for guiding and transporting the filtered absorbed liquid, and the absorbent liquid flowing along the flow path forming means 14 to the flow sensor 15 The amount is measured by

The flow sensor 15 is installed on the lower side of the filtration member 11, and quantifies the amount of the absorbed liquid filtered and when it falls below a certain flow rate sends a signal to the controller so that the filtration member 11 is automatically replaced Activate the roll (16).

The absorbed liquid thus filtered is stored in the first chamber 10, and a predetermined amount flows out through the first outlet 10b and is transferred to the gaseous pollutant removing apparatus 20 according to the present invention.

Here, the configuration and operation relationship of the gaseous pollutant removal device, which is an absorbent liquid recycling device for a harmful gas dust collecting facility using the microbubble according to the present invention will be described.

4 is a schematic block diagram showing a gaseous pollutant removal device of the absorbent liquid recycling apparatus for harmful gas dust collecting facilities using micro bubbles according to the present invention.

The gaseous contaminant removing apparatus according to the present invention is to remove gaseous contaminants in the absorbent liquid by using micro bubbles, and the micro bubbles have the following characteristics for removing suspended solids and oxidizing organic contaminants.

1) When the microbubble is negatively charged on the bubble surface, the adhesion force with the suspended particles in the waste water increases (see FIG. 6).

(k: 상수, q: 전하량, r: 입자간 거리)로 구해보면 마이크로버블과 폐수중 부유입자간의 부착력이 증가함을 알 수 있다.That is, zeta potential of -35 mV is charged to φ20 to 60 µm microbubbles, and suspended particles in the waste water are usually charged with positive charges.

(k: constant, q: charge amount, r: distance between particles) shows that the adhesion between the microbubbles and the suspended particles in the wastewater increases.

2) The microbubbles have a slow flotation speed compared to the normal bubbles in the absorbent liquid (see FIG. 7).

(g: 중력가속도, ρa: 기포의 비중, ρ: 용매의 비중, d: 기포직경, μ: 용매의 점도)로 구해보면, 마이크로 버블은 흡수액 속에서 보통의 버블과 비교하여 느린 부상 속도를 가짐을 알 수 있다.In other words, the bubble behavior in wastewater follows the stoke's law.

(g: gravitational acceleration, ρa: specific gravity of bubbles, ρ: specific gravity of solvent, d: bubble diameter, μ: viscosity of solvent) It can be seen.

3) As the microbubble has a large specific surface area per unit volume, it increases the efficiency of buoyancy and buoyancy in the inlet in the wastewater.

로 구해지고, 상기 부력은

(N: 기포수, ρa: 기포의 비중, d: 기포직경, g: 중력가속도)로 구해질 수 있는데, 보통의 버블에 비하여 마이크로버블은 증가된 부력을 가짐을 알 수 있다(도 8 참조).The specific surface area is

And buoyancy is

(N: number of bubbles, ρa: specific gravity of bubbles, d: diameter of bubbles, g: gravity acceleration), it can be seen that microbubbles have an increased buoyancy compared to ordinary bubbles (see FIG. 8). .

4) In addition, in terms of organic oxide oxidation removal, the internal and external pressure difference of the microbubble, and the microbubble by the ultrasonic treatment to further refine the pressure and temperature in the bubble, and the instantaneous high temperature / high pressure generated by the bursting of the microbubble Due to this, bacteria and organic contaminants may be decomposed in the absorbent liquid.

The gaseous pollutant removing apparatus 20 according to the present invention has an inflow tank 22 having a treated water in which dust is first removed from the dust removing device 10, that is, a primary treated water inlet 21 into which an absorbent liquid is introduced. And a separation tank 23 integrally connected directly to the inflow tank 22 and having a secondary treatment water outlet.

In addition, the microbubble generating jacket 24 is integrally attached to the bottom surface of the separation tank 23, and a skimmer 25, which is a kind of floating fence, is disposed at the upper end of the separation tank 23, and the separation tank ( At a predetermined lower end portion of 23, a recirculation pump 27 is mounted to pump a portion of the absorbent liquid in the separation tank 23 and circulate it to the microbubble generator 28.

In particular, the microbubble generator 28 is connected to each other with an ozone generator 31 for generating ozone gas and an air supply valve 30 therebetween, the microbubble generator 28 is the ozone generator ( The ozone from 31 and the absorbent liquid from the recirculation pump 27 are mixed and supplied to the microbubble generating jacket 24.

Reference numeral 29 is a pressure gauge of the microbubble generating device 28.

Here, the micro-bubble generating device will be described in more detail as follows.

5 is a schematic view showing a microbubble generating device according to the present invention.

The microbubble generating device includes a primary mixing chamber 33 having a recycling water inlet 32 for connecting to the ozone generating device 31 at an upper end thereof, and the primary mixing chamber 33 has a secondary The mixing chamber 34 and the tertiary mixing chamber 35 are continuously connected to each other. In particular, the mixing chamber primary connecting nozzle 36 is provided between the primary mixing chamber 33 and the secondary mixing chamber 34. The secondary connecting nozzle 37 is arranged between the secondary mixing chamber 34 and the tertiary mixing chamber 35.

At this time, the lower end of the tertiary mixing chamber 35 is formed with a microbubble mixed solution outlet 38 connected to the microbubble generating jacket 24 attached to the bottom surface of the separation tank (23).

Here, look at the operation flow for the absorbent liquid recycling apparatus for harmful gas dust collecting facility using the microbubble of the present invention having the above configuration as follows.

First, the contaminated absorbent liquid from the scrubber tank is introduced into the dust removing apparatus 10 as described above to remove dust and other suspended substances first, and then the primary treated absorbent liquid removes the gaseous contaminants according to the present invention. Move to device 20.

1, the absorbent liquid flowing into the inflow tank 22 of the gaseous pollutant removal device 20 moves to the separation tank 23 through the inflow tank 22 in a continuous flow manner, and enters the separation tank 23. The primary treatment absorbent liquid is mixed with ozone microbubbles having an average diameter of about 30 μm discharged from the microbubble generating jacket 24, and gaseous contaminants in the absorbent liquid are decomposed by the ozone microbubbles.

Ozone microbubbles are generated using the Bernoulli principle that "the sum of all forms of energy on the streamline for a flowing fluid is always constant."

That is, some of the absorbed liquid regenerated by the recirculation pump 27 is recycled and flows into the microbubble generator 28 together with the ozone gas produced by the ozone generator 31, where the inflow amount of the ozone gas is air. It is changed by the supply valve 30, in this process the pressure inside the microbubble generating device 28 is changed, which can be confirmed by the pressure gauge (29).

Thus, the absorbent liquid and ozone gas introduced into the microbubble generator 28 are pressurized in the primary mixing chamber 33 and are mixed liquids in which ozone gas is supersaturated in the absorbent liquid, followed by the primary mixing chamber ( 33) and the mixing chamber primary connecting nozzle 36 arranged between the secondary mixing chamber 34 and the secondary nozzle 37 arranged between the secondary mixing chamber 34 and the tertiary mixing chamber 35 in succession. As the flow velocity increases during the passage, the pressure decreases, causing microbubbles.

This process is repeated several times to generate microbubbles, and the mixed liquid mixed with the absorbing liquid and ozone is discharged into the separation tank 23 through the microbubble generating jacket 24 having micropores, and ozone having an average diameter of about 30 μm. Generate micro bubbles.

Therefore, the gaseous contaminants in the primary treatment absorbent liquid introduced into the separation tank 23 are easily decomposed by ozone micro bubbles having an average diameter of about 30 μm.

In addition, by removing the fine suspended matter removed by the dust removal device 10, it is possible to obtain a bactericidal effect on the microorganisms that can cause odor by breeding in the absorbent liquid, and also ozone remaining in the absorbent liquid Micro bubbles can be directly decomposed odorous substances in the process of cleaning the polluting gas.

Finally, the regenerated absorbent liquid is returned to the constant volume prevention facility tank 2 through the secondary treated water outlet 26.

1 is a schematic view showing a conventional scrubber,

2 is a schematic diagram illustrating a state in which a dust removal device and a gaseous pollutant removal device are connected to a scrubber;

3 is a schematic configuration diagram illustrating the dust removing apparatus of FIG. 2;

Figure 4 is a schematic block diagram showing a gaseous pollutant removal device of the absorbent liquid recycling apparatus for harmful gas dust collecting facility using a micro bubble according to the present invention,

Figure 5 is a schematic diagram showing a micro-bubble generating device of the gaseous pollutant removal device shown in FIG.

6 to 8 are conceptual views illustrating the characteristics of microbubbles.

<Description of the symbols for the main parts of the drawings>

10: first chamber 11: filtering member

12 roller 13 support means

14: flow path forming band 15: flow sensor

16: extrusion roll 17: sludge feed device

18: sludge storage 19: waste filter member storage

20: gaseous pollutant removal device 21: primary treatment water inlet

22: inflow tank 23: separation tank

24: fine bubble generating jacket 25: skimmer

26: secondary treatment water outlet 27: recirculation pump

28: fine bubble generator 29: pressure gauge

30: air supply valve 31: ozone generator

32: recycled water inlet 33: primary mixing chamber

34: 2nd mixing chamber 35: 3rd mixing chamber

36: 1st connection nozzle 37: 2nd connection nozzle

38: fine bubble mixed liquid outlet

Claims (4)

In the absorbent liquid recycling apparatus for harmful gas dust collecting facility using a micro-bubble comprising a dust removing device for removing dust from the absorbent liquid used in the harmful gas dust collecting facility, An inflow tank 22 having a primary treatment water inlet 21 through which an absorbent liquid from which dust is first removed from the dust removal device 10 flows; A separation tank 23 integrally connected directly to the inflow tank 22 and having a secondary treatment water outlet 26 at a lower end thereof; A microbubble generating jacket 24 mounted to the bottom surface of the separation tank 23; A recirculation pump 27 for pumping a part of the absorbent liquid in the separation tank 23 and circulating the microbubble generator 28; An ozone generator (31) connected to the microbubble generator (28) to supply ozone gas; By configuring In the microbubble generator 28, the ozone from the ozone generator 31 and the absorbent liquid from the recirculation pump 27 are mixed and supplied to the microbubble generating jacket 24, and the microbubble generating jacket ( 24) Absorption liquid recycling apparatus for harmful gas dust collecting facility using a micro bubble, characterized in that the micro bubble is generated in the absorbent liquid in the separation tank. The method according to claim 1, The microbubble generating device is: A primary mixing chamber 33 having a recycling water inlet 32 for connecting to the ozone generator 31 at an upper end thereof; A secondary mixing chamber 34 and a tertiary mixing chamber 35 which are continuously communicatively connected to the primary mixing chamber 33; A primary connection nozzle (36) arranged between the primary mixing chamber (33) and the secondary mixing chamber (34); A secondary nozzle (37) arranged between the secondary mixing chamber (34) and the tertiary mixing chamber (35); A microbubble mixed liquid outlet 38 formed at a lower end of the tertiary mixing chamber 35 and connected to the microbubble generating jacket 24; Absorption liquid recycling apparatus for harmful gas dust collecting facility using a micro bubble, characterized in that consisting of.  The method according to claim 1 or 2, The microbubble ejected from the microbubble generating jacket 24 is an ozone microbubble having an average diameter of about 30 μm. The method according to claim 1, Absorbent liquid recycling apparatus for harmful gas dust collecting facility using a micro bubble, characterized in that the skimmer (25) is a kind of floating fence at the upper end of the separation tank (23).

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