JP2003190778A - Gas-liquid contact reactor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-liquid contact reactor capable of being suitably used when avoidance concrete wastewater is subjected to neutralization treatment while suppressing the formation and growth of scale on an infinite variety of many execution spots for discharge quantity. <P>SOLUTION: The gas-liquid contact reactor has the downwardly opened cylinder arranged in a liquid storage tank from above, a liquid discharge nozzle device for spraying a liquid into a cylinder downwardly, a carbon dioxide gas supply pipe having an outflow port around the liquid discharge nozzle device in the cylinder and the negative pressure forming device, which is formed of a soft material, arranged under the liquid discharge nozzle device and having an opening provided to the center thereof. The liquid discharge nozzle device has a jet nozzle and a plurality of liquid jet nozzles arranged to the outer periphery of the jet nozzle at equal intervals so as to leave equal distances from the center of the jet nozzle. A plurality of liquid jet nozzle orifices are arranged in a direction wherein the liquids discharged from the respective nozzles meet with each other at the opening part of the negative pressure forming device. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid contact reaction device for reacting a gas with a liquid such as when neutralizing waste water is formed by reacting a liquid such as alkaline waste water with carbon dioxide gas. More specifically, as can be seen in the case of performing a neutralization reaction by reacting carbon dioxide gas with alkaline wastewater flowing out from a concrete construction site, solid products such as calcium carbonate are generated during the reaction, and It grows in the reactor or the attached pipeline etc. as it progresses,
The present invention relates to a gas-liquid contact reaction apparatus that can be suitably used for a reaction that may possibly impair the continuous progress of the reaction.

[0002]

2. Description of the Related Art In a concrete construction site, a concrete product manufacturing plant such as a concrete pile and a concrete block, or a site or factory using cement such as a ready-mixed concrete manufacturing plant, cleaning drainage of construction equipment, manufacturing equipment, transportation equipment, etc. Surface peeling drainage that occurs when concrete is spliced, or strong alkaline drainage (hereinafter referred to as alkaline drainage) that contains an alkaline substance such as calcium hydroxide such as sprinkling water that forms on the surface when concrete is solidified.

In particular, at a large-scale concrete construction site such as a dam, a tunnel, a waterway or the foundation of a large-scale building, it is impossible to drive concrete at a time, and the concrete is divided into a plurality of times. At that time, in order to form a good striking seam, surface treatment is performed on the surface at the time of the previous striking. That is, the driving of each concrete is carried out within a few hours after the previous driving, and in that case, the driving is carried out after the unsolidified thin layer on the surface is peeled off instead of directly driving the surface.

Therefore, every time the stripping is performed, alkaline waste water containing calcium hydroxide or the like is generated.
This alkaline wastewater cannot be discharged as it is to a river or the like, but it is discharged after being neutralized and treated to comply with the wastewater legal regulations. This neutralization process was performed using an acid solution such as sulfuric acid or hydrochloric acid in the old days, but it is dangerous to handle these acids, and it means that sulfate ions and hydrochloric acid ions are additionally released. Secondary toxic emissions will occur.

The applicant of the present invention has previously proposed a neutralization processing technique which does not cause such a problem (Japanese Patent Publication No.
No. 2-44559), it is a method of neutralizing alkaline wastewater containing calcium hydroxide and the like with carbon dioxide. This method uses inexpensive carbon dioxide gas for neutralization, and has the advantage that carbon dioxide gas is not toxic like sulfuric acid or hydrochloric acid and is easy to handle. The apparatus used for this neutralization treatment has a structure in which carbon dioxide gas is ejected from the gas disperser having a large number of small holes arranged in the lower part of the storage tank into the waste water in the storage tank.

This device is as described above, but when it is used for concrete drainage, the precipitated calcium carbonate may cause the progress of the reaction depending on the conditions such as pH and temperature during the neutralization reaction. It is assumed that there is a situation in which it grows with it and forms and grows scales in gas-liquid contact parts or pipes, etc., resulting in a decline in equipment capacity or the inability to continue the reaction. The applicant has already proposed (Japanese Utility Model Publication No. 59-6956).

This reaction apparatus is an ejector type gas-liquid contact reaction apparatus in which a liquid such as alkaline waste water is jetted from a nozzle and carbon dioxide is sucked by this jet, and if the flow rate is set in advance, dismantling cleaning, etc. It is also assumed that there is no pH value modulation that causes scale generation. Regarding the ejector type gas-liquid contact device having such advantages, other proposals have been made, for example, there is a proposal regarding the structure of the ejector type gas-liquid contact reaction device (Japanese Patent Publication No. 59-45440). )

[0008] Even after that, the Applicant has continued to carry out research and development on this technology, and one of the results thereof is the above-mentioned pH which causes scale formation and growth in an ejector type gas-liquid contact reactor. There is a proposal regarding a pH control method which does not cause modulation (Japanese Patent Laid-Open No. 10-
57971). Although this ejector type gas-liquid contact reaction device is an excellent reaction device for use in a reaction that avoids scale formation, etc. as described above, it was preset to avoid scale formation and growth as described above. It is necessary to maintain the flow rate.

When this ejector type gas-liquid contact reactor is used for neutralizing concrete drainage, it is often used at one construction site during the construction period, and after completion of the construction, it is moved to another site. It is used. The amount of concrete wastewater discharged at each construction site varies depending on the size of the construction work, etc. By maintaining alkaline wastewater with different discharge amounts at a preset flow rate in this way, it is possible to temporarily store wastewater that exceeds the treatment amount. There is no choice but to deal with it, and therefore storage facilities are needed according to the construction scale.

Regarding the above-mentioned preset flow rate, in order to avoid the formation and growth of scale in the case of concrete drainage, the flow velocity at the outlet of the nozzle is 8 to 15 m / se.
It is necessary to be c, preferably 10
It is preferable to set it to ˜12 m / sec. Further, in that case, the calcium hydroxide content in the concrete drainage is also preferably low rather than very high, and specifically 100 ppm or less.

[0011]

As described above, in the ejector type gas-liquid contact reaction apparatus which can be preferably used for the neutralization treatment of concrete drainage, it is necessary to avoid the formation and growth of scale when utilized for the neutralization treatment. Has an appropriate treatment amount, and in order to carry it around and use it at many construction sites with various treatment amounts, the conventional ejector type gas-liquid contact reactor has a constant treatment capacity and cannot be changed. , Was insufficient.

The present invention provides an ejector type gas-liquid contact reaction device which solves the above problems. That is, when neutralizing the concrete drainage at many construction sites with various treatment amounts, it is possible to select a treatment amount capable of avoiding the formation and growth of scale in two or more steps, preferably in three or more steps. It is an object of the present invention to provide an ejector type gas-liquid contact reaction device which can be suitably used for neutralizing a concrete drainage having a function.

[0013]

The present invention provides a gas-liquid contact reaction apparatus for achieving the above object, and comprises two inventions. The apparatus of the first invention is a liquid storage tank. A cylinder which is arranged inside from above and which is open from below; a liquid discharge nozzle device which is arranged above the cylinder and jets liquid from above; and a liquid discharge nozzle device in the cylinder. The liquid discharge nozzle device includes a carbon dioxide gas supply pipe having an outlet around the liquid discharge portion, and a negative pressure forming device formed below the liquid discharge nozzle device and formed of a soft material having an opening in the center. A jet nozzle having a narrowed tip and a plurality of jet nozzles arranged on the outer circumference of the jet nozzle and having a narrow tip, and the jet nozzle and the liquid jet nozzles each have a nozzle opening. Liquid to be emitted from the front And it is characterized in that it is arranged in a direction converging at the opening.

The device of the second invention comprises a liquid storage tank,
A cylinder which is arranged in the inside from above and is open at the bottom, a liquid discharge nozzle device which is arranged at the top of the cylinder and ejects liquid from above to below, and a liquid discharge in the cylinder and in the liquid discharge nozzle device. The liquid discharge nozzle device includes a carbon dioxide gas supply pipe having an outlet port around a part thereof, and a negative pressure forming device formed below the liquid discharge nozzle device and formed of a soft material having a slit-shaped opening in the center. A slit-shaped jet nozzle having a narrowed tip, and at least one slit-shaped liquid jet nozzle having a narrow tip arranged along the longitudinal direction of the jet nozzle, and the jet nozzle and the jet nozzle. The nozzles are characterized in that the liquids discharged from the nozzle openings are arranged in a direction in which the liquids merge at the openings.

The preferred ejector type gas-liquid contact reactor of the present invention has three or more nozzles for discharging liquid such as waste water as shown in FIGS. When neutralizing concrete drainage at many construction sites with various amounts, the neutralization of concrete drainage has the function of selecting three or more treatment volumes that can prevent the formation and growth of scale. It is suitable for use and has excellent effects.

That is, in the ejector type gas-liquid contact reaction apparatus of the present invention, in the apparatus shown in FIG. 1, the nozzle for discharging the liquid can be operated in the following three ways, and the processing capacity can be selected in three or more stages. . Only the central ejection nozzle operates independently.Only the ejection nozzles on the outer periphery of the central ejection nozzle operate. Both the central ejection nozzle and the ejection nozzles on the outer periphery of the ejection nozzle operate. In many different construction sites, the treatment amount capable of avoiding the formation and growth of scale during the neutralization treatment of concrete drainage can be appropriately selected from the three types described above. It has an excellent effect of being able to adopt an appropriate treatment amount according to the construction site.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The gas-liquid contact reaction device of the present invention will be specifically explained based on the description of the drawings, but the present invention is not limited to the embodiments and structures shown in the drawings, It goes without saying that it is specified based on the description of the claims. First, the outline of the gas-liquid contact reaction device of the present invention will be described with reference to FIG.

FIG. 1 shows the whole apparatus of a gas-liquid contact reaction apparatus which can be suitably used when neutralizing concrete wastewater with carbon dioxide gas. The reaction apparatus is a reaction tank 1,
A control device 3, a waste water storage tank 4, and a carbon dioxide bomb 6 are provided, and the reaction tank 1 has a liquid discharge nozzle device 2, a cylinder 12 surrounding a liquid discharge space below the liquid discharge nozzle device 2, and an open lower cylinder 12 and a pH electrode. 32 are equipped. The illustrated reactor has a mode that can be suitably used for the reaction of neutralizing concrete wastewater with carbon dioxide gas, and therefore will be described in more detail by taking the case of utilizing the neutralization reaction as an example.

In this reaction apparatus, the concrete waste water stored in the waste water storage tank 4 is supplied to the liquid discharge nozzle device 2 by the submersible pump 14 through the conduit 15, and the negative water in the cylinder 12 of the reaction tank 1 is supplied from the device 2. It is discharged toward the opening 27A in the center of the pressure forming device 27. As a result, negative pressure is generated due to the discharge of concrete drainage and passage through the opening 27A of the negative pressure forming device, especially as the speed increases due to passage through the opening 27A, and the negative pressure causes the liquefied carbon dioxide stored in the carbon dioxide cylinder 6 to gas. It is converted into a conduit 17 and sucked through a pressure regulator 18. At this time, gasified carbon dioxide, that is, carbon dioxide gas, is dissolved in the concrete drainage and rapidly reacts with calcium hydroxide in the drainage.

The concrete drainage and carbon dioxide gas discharged into the cylinder 12 move to the outside of the cylinder 12 of the reaction tank 1 from the lower opening 12A of the cylinder 12 after the reaction. This reaction is a neutralization reaction that produces calcium carbonate with calcium hydroxide and carbon dioxide, and as the reaction progresses, p
H falls, and at the end of the reaction the pH drops to 7 or below. Therefore, the end of the reaction can be determined by observing the pH change of the liquid in the reaction tank 1 with the pH display device 31 connected to the pH electrode 32 installed in the reaction tank 1.

The measurement result of the pH display device is managed by the control device 3. When the end of the reaction is detected based on the measurement result, the on-off valve 19 of the conduit 17 for supplying carbon dioxide gas is closed. Stop supplying carbon dioxide. Further, the drainage pipe 11 attached to the reaction tank 1 discharges the neutralized drainage. The pressure adjuster 18 is provided with a heater to avoid closing due to solidification of carbon dioxide gas, and a control signal is transmitted from the control device 3 to adjust the heating degree according to the supply amount of carbon dioxide gas. This is also illustrated in FIG.

Then, in the reactor of FIG. 1,
The conduit 15 for supplying the concrete drainage stored in the drainage storage tank 4 to the liquid discharge nozzle device 2 is branched into two in the middle, and the matter related to this point is one of the features of the present invention. Each of the branched conduits is provided with an opening / closing valve (16A, 16B), and by this opening / closing, execution or stop of supplying concrete drainage to a plurality of nozzles of the liquid discharge nozzle device 2 is selected. it can.

For example, the opening / closing valve 16A is opened and 1
When 6B is closed, concrete drainage is discharged from the nozzle located in the center of the liquid discharge nozzle device 2 connected to the branch conduit 15A equipped with the valve 16A, but is connected to the branch conduit 15B equipped with the valve 16B. No concrete wastewater is discharged from the nozzle. On the contrary, when the open / close valve 16B is opened and 16A is closed, the concrete drainage is discharged from the nozzle connected to the branch conduit 15B contrary to the above case, but the nozzle connected to the branch conduit 15A is discharged. There is no discharge of concrete drainage.

At this time, if the number of nozzles connected to the branch conduit 15A and the number of nozzles connected to 15B are made different, the discharge amount of the concrete drainage discharged from the liquid discharge nozzle device 2 is selected by selecting the valve to be opened. You can choose. Further, when both opening / closing valves 16A and 16B are opened, concrete drainage is discharged from all the nozzles. As a result, the discharge amount of concrete drainage can be changed in three stages by using the illustrated liquid discharge nozzle device 2.

A preferred detailed structure of the liquid discharge nozzle device 2 shown in FIG. 1 is shown in FIG. The reaction tank 1 has an open upper portion and an open portion 12A at the lower portion.
A cylinder 12 having an arrow extends from the upper end to the lower end inside the reaction tank 1. The liquid discharge nozzle device 2 is attached to the upper open end of the cylinder 12, and the flange portion 20A of the liquid discharge nozzle device 2 is attached to the shoulder of the upper open portion of the reaction tank 1 for the attachment. It is made in form.

A negative pressure forming device 27 is provided so as to hang down in the cylinder 12 below the liquid discharge nozzle device 2, that is, below the flange portion 20A. The negative pressure forming device 27 is attached to the flange portion 20A of the liquid discharge nozzle device 2 as shown in FIGS.
It is done by 5. Specifically, one end of each bolt is below the flange portion 20A and the other end is the negative pressure forming device 27.
It has been fixed to the four corners. Furthermore, the liquid discharge nozzle device 2
On the lower side of the flange portion 20A of the negative pressure forming device 27, a short tube 26 that fits with the upper end of the cylinder 12 extends downwardly on the outer peripheral side of the negative pressure forming device 27.
The upper part of 2 and the liquid discharge nozzle device 2 are connected in an airtight state.

On the other hand, on the upper part of the liquid discharge nozzle device 2, that is, on the upper side of the flange portion 20A, there is a nozzle portion 20, there is an injection nozzle 21 in the center thereof, and two ejection nozzles 22, 23 around it. There is. Further, a connecting pipe 24 connected to the conduit 17 for supplying carbon dioxide gas is also provided above the flange portion 20A. The above-mentioned branch conduit 16A is connected to the central injection nozzle 21 and the branch conduits 16B are connected to the surrounding ejection nozzles 22 and 23. Concrete drainage is supplied to these nozzles, and the inside of the reaction tank 1 is supplied from each nozzle port. In the cylinder 12 of the negative pressure forming device 2
7 is ejected toward the opening 27A.

The negative pressure forming device 27 attached to the lower portion of the liquid discharge nozzle device 2 has an elastic opening plate 28 made of an elastic material such as polyurethane having an opening 28A at the center. Regarding the material used for this elastic opening plate, it is not limited to polyurethane, as long as the opening degree changes according to the discharge flow rate of concrete drainage,
Various materials can be used, and examples thereof include closed cell sponge and soft rubber, in addition to the polyurethane.

The central opening 28A of the elastic opening plate 28 is
It is desirable to have a structure in which the liquid discharge nozzle device side is gradually narrowed toward the opposite side. In this elastic opening plate 28, the opening 28A is expanded by the concrete drainage discharged from the liquid discharging nozzle device 2, and the opening degree thereof needs to automatically change in accordance with the discharged concrete drainage flow rate. , This is especially important.

As described above, the opening 28A of the elastic opening plate 28 is expanded in accordance with the concrete drainage flow rate. At that time, the concrete drainage discharged from the liquid discharge nozzle apparatus 2 causes the liquid discharge nozzle apparatus 2 to move. May also be curved and deformed to the opposite side. The material used for this elastic aperture plate is an elastic material such as polyurethane, and it is not as durable as metal when it is repeatedly deformed excessively, so it may be damaged or destroyed in a short period of time. is there.

In order to prevent such excessive deformation and avoid damage in a short period of time, it is desirable to attach a holding plate 29. The holding plate 29 is formed with a notch so that the elastic opening plate 28 is deformed in a predetermined curve and the opening degree can be changed in accordance with the discharge flow rate of the concrete drainage. An annular gap 29A is formed between them. As a result, the elastic opening plate 28 can be curved in accordance with the discharge flow rate of the concrete drainage, and the opening width of the opening 28A can be expanded to cope with the increase in the flow rate.

Next, the operation of the gas-liquid contact reaction device, particularly the liquid discharge nozzle device 2 and the negative pressure forming device 27 will be described. When the valve 16A is opened, the concrete drainage is supplied to the injection nozzle 21 through the branch conduit 15A, and from there, the opening 27A in the center of the negative pressure forming device 27.
Is jetted toward.

Negative pressure is generated in the upper part of the cylinder 12 as the speed of the concrete drainage is ejected and passes through the opening 27A of the negative pressure forming device, especially as it passes through the opening 27A, and the negative pressure is stored in the carbon dioxide cylinder 6. The liquefied carbon dioxide thus obtained is sucked from the connecting pipe 24 through the conduit 17 via the pressure regulator 18 through the conduit 17, and the concrete drainage and the carbon dioxide gas flow toward the negative pressure forming device 27 in a turbulent flow state and both are in good gas-liquid contact. However, the neutralization reaction proceeds well.

Instead of opening the valve 16A, the valve 1
When both valves 6A and 16B are opened, the concrete drainage passes through the branch conduits 15A and 16A, is supplied to all the nozzles 21, 22 and 23, and is ejected from them toward the negative pressure forming device 27. As shown in FIG. 2, the discharge direction of the concrete drainage at that time is such that the concrete drainage from all the nozzles is directed toward the opening 28A of the elastic opening plate 28,
This is one of the major features of the present invention.

Therefore, in this reaction apparatus 1, the center lines penetrating the nozzle openings of the ejection nozzles 22 and 23 of the liquid discharge nozzle apparatus 2 are not directly below but slightly inclined so as to join at the opening 28A of the elastic opening plate 28. Is extended. In this way, when the concrete drainage is ejected from all the nozzles, the ejection amount of the concrete drainage is three times as large as when ejecting the nozzle 21 alone, and such a large amount of concrete drainage passes through the same opening 28A. However, in the present invention, the opening degree of the opening is changed according to the ejection amount, which is also one of the major features of the present invention.

In this reaction apparatus, it is possible to operate the two nozzles 22 and 23 provided in the liquid discharge nozzle apparatus 2 instead of the above-mentioned one nozzle and three nozzles, and for that purpose, a valve is used. Open only 16B and let the concrete drainage pass through the branch conduit 16B,
It may be supplied to the ejection nozzles 22 and 23. Thus, in the present invention, since it is possible to perform the reaction by supplying the concrete drainage to the gas-liquid contact reaction device in three-stage supply amount,
It is possible to flexibly respond to various processing amounts. In particular, it can be suitably used for neutralizing concrete drainage at many construction sites with various discharge amounts.

The number of nozzles installed in the liquid discharge nozzle device 2 in the reaction apparatus of the present invention is not limited to three, but may be any number as long as they are arranged on the outer periphery of the injection nozzle arranged in the center, and preferably. It is preferable to arrange them at equal intervals around the injection nozzle 21. As the number of nozzles arranged increases, the level of concrete drainage supply can be increased.

Regarding the shape of the nozzle port of the liquid discharge nozzle device 2, the cross section orthogonal to the ejection direction is a circle, an ellipse, or various regular polygons such as regular triangle, regular square, regular pentagon, etc. A square or the like or a shape similar thereto can be used. Although the nozzle device shown in the figure is manufactured by drilling each nozzle in a single member such as a metal, it is of course possible to manufacture each nozzle individually and then combine them by welding or the like. It is a thing.

Regarding the shape of the nozzle port, not only the above-mentioned circular shape, elliptical shape, regular polygonal shape or a shape similar thereto, but also a shape having a long and thin cross section, that is, Japanese Patent Publication No. 59-45440 shown in FIG. It may have a slit shape as described in 1. When the nozzle opening of the liquid discharge nozzle device 2 is formed into the slit shape as described above,
It is necessary to arrange at least two nozzles having the same shape in parallel.

In that case, two nozzles may be operated simultaneously or individually. Further, the opening 27A at the center of the negative pressure forming device 27 at that time needs to be slit-shaped like the shape of the nozzle port. When the nozzle opening is shaped like a slit in this way, the amount of discharge from the nozzle opening becomes large and the processing amount of the gas-liquid contactor increases, so it is suitable for large-scale processing with little fluctuation in processing amount. It is suitable and can achieve a certain purpose even if the number of steps is not large.

Further, the drainage discharged from each slit nozzle needs to go to the opening at the center of the negative pressure forming device, as in the case of the liquid discharging nozzle device 2 shown in FIG. Each nozzle of the slit-shaped nozzle,
The drainage discharged from the mouth is arranged so as to be directed to the opening of the negative pressure forming device. In addition, the cylinder 12 shown in FIG. 2 is provided around the nozzle opening of the slit-shaped nozzle of the negative pressure forming device.
It is also necessary to install a cylinder so that negative pressure is generated and carbon dioxide gas can be sucked in as in the above.

When the gas-liquid contactor of the present invention having the characteristics and structure as described above is used to react concrete drainage with carbon dioxide to carry out a neutralization reaction, formation and growth of scale is avoided. Is required to control the liquid flow velocity at the outlet of the nozzle to 8 to 15 m / sec, preferably 10 to 1 as in the prior art.
It is good to set it to 2 m / sec.

At that time, the calcium hydroxide content in the concrete drainage is also preferably low rather than very high, and specifically 100 ppm or less. Also, the diameter of the accompanying particles is preferably small, and specifically, it is preferably 50 μm or less. By selecting the conditions in this way, the generation of calcium carbonate can be avoided. Therefore, at the actual construction site, a filter of about 60 mesh is attached to the drainage pump, and the passage of fine particles is regulated by the attachment to suppress entrainment in the gas-liquid contact device.

As described above, by attaching the filter, the passage of fine particles is regulated, the entrainment in the gas-liquid contact device is suppressed, and the damage and abrasion of the wall of the gas-liquid contact device, internal members, etc., especially the elastic opening plate 28. Avoid damage or abrasion of the, or scale formation and growth. For that purpose, the particle size of the fine particles entrained in the gas-liquid contactor is 50 μm as described above.
It is preferably m or less.

[0045]

The gas-liquid contact reaction device of the present invention has three or more nozzles of a liquid discharge nozzle device for discharging a liquid such as waste water and generating a negative pressure for sucking carbon dioxide gas, and at least three. It can be operated with the same injection amount, and the processing amount can be selected in three or more steps. As a result, at many construction sites where the treatment amount varies, the treatment amount capable of avoiding the formation and growth of scale when neutralizing concrete drainage is appropriately selected from at least the above three types. According to the present invention, it is possible to adopt an appropriate treatment amount according to the construction site, and to exert an excellent effect.

[Brief description of drawings]

FIG. 1 shows the entire apparatus of the gas-liquid contact reaction apparatus of the present invention, which is an embodiment that can be suitably used for neutralizing concrete drainage with carbon dioxide gas.

FIG. 2 is a diagram illustrating a detailed structure of the liquid discharge nozzle device in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along the line BB of FIG.

FIG. 5 is a view showing another mode of the liquid discharge nozzle device.

[Explanation of symbols]

1 reaction tank 2 liquid discharge nozzle device 3 control device 4 drainage storage tank 6 Liquefied carbon dioxide cylinder 12 cylinders 15A, B branch conduit 16A, B open / close valve 20 nozzle 20A flange 21 injection nozzle 22, 23 jet nozzle 25 volts 27 Negative pressure forming device 27A opening 28 Elastic aperture plate 28A opening 29 holding plate 29A gap

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 1/66 522 C02F 1/66 522B 530 530B ZAB ZAB (72) Inventor Shuichi 2 Nishinippori, Arakawa-ku, Tokyo No. 24 No. 2 Shimashima Seisakusho (72) Inventor Keiji Ishii 4-16-23 Shibaura, Minato-ku, Tokyo E-term Techno System Co., Ltd. F-term (reference) 4G056 CD47 4G075 AA03 AA13 AA37 BA06 BD17 DA02 EC01 EC04

Claims (2)

[Claims] 1. A liquid storage tank, a cylinder which is disposed inside from above and which is open from below, a liquid discharge nozzle device which is disposed above the cylinder and ejects liquid from above to below, and in the cylinder. And a carbon dioxide gas supply pipe having an outflow port around the liquid discharge portion of the liquid discharge nozzle device, and a negative pressure forming device formed below the liquid discharge nozzle device and formed of a soft material having an opening in the center. The liquid discharge nozzle device has a jet nozzle having a narrowed tip, and a plurality of jet nozzles having a narrow tip arranged on the outer circumference of the jet nozzle.
Moreover, the gas-liquid contact reaction device, wherein the jet nozzle and the plurality of liquid jet nozzles are arranged in a direction in which the liquid discharged from each nozzle port merges at the opening. 2. A liquid storage tank, a cylinder which is disposed inside from above and which is open from below, a liquid discharge nozzle device which is disposed above the cylinder and ejects liquid from above to below, and in the cylinder. And a carbon dioxide gas supply pipe having an outflow port around the liquid discharge portion of the liquid discharge nozzle device, and a negative pressure forming device formed below the liquid discharge nozzle device and formed of a soft material having a slit-shaped opening in the center. The liquid discharge nozzle device includes a slit-shaped jet nozzle having a narrowed tip, and at least one slit-shaped liquid jet nozzle having a narrowed tip arranged along the longitudinal direction of the jet nozzle. Moreover, the gas-liquid contact reaction device, wherein the jet nozzle and the jet nozzle are arranged in a direction in which the liquid discharged from each nozzle port merges at the opening.