JPS6068036A - Fluid contacting device - Google Patents

Abstract

PURPOSE:To obtain a fluid contact device causing hardly blockage and resulting superior contact effect by providing a rigid bowl-shaped body connecting to a feed pipe of fluid and a slit for ejecting the fluid to the part at the periphery of the bowl-shaped body and between the bowl-shaped body and a plate contacting with the bowl-shaped body. CONSTITUTION:A mixing device 4 to be installed in an open tank 5 is constituted of a rigid bowl-shaped body 14 connecting to a feed pipe 1, 2 of fluid and a plate 16 contacting with the bowl-shaped body 14. Slits for ejecting the fluid are provided to the part between the periphery of the bowl-shaped body 14 and the plate 16. Thus, when the fluid is fed from the fluid feeding port 15, the fluid mixed in the mixing device 4 is atomized to form bubbles and ejected from the whole periphery of the slit into the tank. The quantity of the fluid ejected from the slit is increased or decreased by the pressure of the supplied fluid, but is made uniform by the buffer effect of the bowl-shaped body 14. As the result, blockage is caused hardly and the contact efficiency of the device is superior.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for efficiently bringing liquids into contact with each other or with gas and liquid.

When performing fluid contact, such as gas-liquid contact, it is always important to effectively disperse the gas in the liquid to increase contact absorption efficiency.

Conventionally, as a method for dispersing gas or other liquid in a liquid, a method of dispersing and injecting gas or liquid through a porous pipe or a porous sintered body has been widely used.

In order to efficiently disperse gas and liquid by such a method, it is necessary to increase the contact area by reducing the size of bubbles when gas contacts liquid. For this purpose, it is necessary to reduce the pore diameter of the porous tube, and as a result, the ejection port becomes particularly prone to blockage, for example, when a precipitate is generated due to a reaction between liquid and gas. If the pore size is increased to avoid this, the bubbles will become larger and the gas-liquid contact efficiency will deteriorate.

As a result of various studies on a fluid contacting device that improves the shortcomings of the conventional method and provides good contact efficiency with less clogging, the authors have developed a mixer that is a gas discharge part. consists of a bowl-shaped body connected to a fluid supply pipe and a plate in contact with the bowl-shaped body, and the slit interval is determined by specifying the position of the plate, so that the slit area on the outer periphery between the bowl-shaped body and the plate is constant. With this configuration, if gas or a premixed gas-liquid mixture is fed into this mixer from the continuous ML supply port, it will be uniformly and extremely finely mixed through the slits on the circumference. The present inventors discovered that bubbles or gas-liquid bubbles are ejected into the liquid, and that excellent fluid contact is achieved without clogging as in a porous pipe. Furthermore, in a sealed tank divided into two upper and lower chambers, the mixer is used to ensure good fluid contact, and the upper chamber is equipped with multiple nozzles that eject liquid in the circumferential direction. The present invention was completed based on the knowledge that a highly efficient fluid contact effect can be obtained by dispersing and injecting fluid through this nozzle.

That is, the gist of the present invention consists of a fluid contact tank and a mixer installed in the fluid contact tank, and the mixer includes a rigid bowl-shaped body connected to a fluid supply pipe and a plate in contact with the rigid bowl-shaped body. This fluid contact device has a slit for ejecting fluid onto the 1 m outer periphery of the bowl-shaped body and the plate. Further, the sealed contact tank for fluid is divided into two chambers, upper and lower, and the lower chamber is equipped with a mixer, and the upper chamber is equipped with a plurality of dispersion nozzles and a fluid outlet, and the mixer is connected to a fluid supply pipe. The dispersion nozzle is composed of a rigid bowl-shaped body and a plate, and has a slit for ejecting fluid on the outer periphery between the bowl-shaped body and the plate, and the dispersion nozzle has a lower end penetrating into the lower chamber and an upper part extending above the outer periphery. This is a fluid contact device with a structure that disperses liquid.

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic diagram showing an example of the simplest device of the present invention. In the examples shown in FIG. 1 and FIG. 2, which will be described later, a case will be described where an alkaline liquid is brought into contact with an acidic gas for neutralization treatment. 1 is a liquid inlet, 2 is a gas inlet, 3 is a premixer, and 4 is a mixer shown in Figure 3, which will be described later. Either fill the open tank in step 5 with water or a specified liquid in advance, or fill it with alkaline liquid, such as cement wastewater, rather than liquid volume 1 while it is empty, or fill it with gas volume 2.
A more acidic gas such as CO2 gas is introduced, and while some premixing is performed in the premixer 3 (ejector type), the gas and liquid enter the mixer 4, and form fine gas-liquid mixed bubbles through the slit portion of the tank. It squirts during 5. Gas absorption is almost complete immediately after ejection, but if some unreacted gas remains due to gas-liquid mixing conditions, such as flow rate,
While the liquid becomes fine bubbles and rises up the liquid column in the tank 5, absorption occurs through gas-liquid contact. In this example, the alkaline liquid and acidic gas are premixed, but in some cases, sufficient absorption may be achieved even if no premixing is performed and only the acidic gas is injected directly into the alkaline liquid in the tank through a mixer. It is done.

FIG. 2 is a schematic diagram showing another example of the present invention.

In the figure, 6 is a liquid population, 7 is a gas mass, 8 is a premixer, and 9 is a mixer. IO is a pressure-resistant sealed contact tank divided into two upper chambers. Reference numeral 11 denotes a nozzle attached to the upper chamber, which has a lower part with a short tube 12 and opens into the lower chamber, and its upper part is structured to disperse and spray liquid onto the outer periphery.

Alkaline liquid and acidic gas pressurized by a pump or the like are introduced from liquid ports 6 and 7, respectively, and while being partially mixed in a premixer 8 in a conduit, a fine gas-liquid mixture is generated when they are ejected from a slit in a mixer 9. Since the foam is in the form of bubbles, most of the contact is good near the spout, but if some remains unabsorbed or unreacted, the bubbles rise in the liquid in the contact tank 10 in the form of fine bubbles. The absorption effect of fragmentation and the pressurization caused by the back pressure of the royal nozzle provide a very effective contact absorption that also serves as a physical absorption effect. Furthermore, due to inadequate operating conditions, absorption is not complete, and unabsorbed gas remains in tank 10.
Even if the liquid remains in the upper part of the lower chamber, the liquid containing the royal gas is pushed up from the leg of the nozzle 11 and is injected toward the outer periphery to absorb the liquid, and the liquid remains in the upper chamber. The mist Q also comes into contact with the existing unreacted gas and contributes to the absorption reaction. The existence of the discharge port 18 provides the liquid and gas passing through the discharge port 13 with the best opportunity for absorption reaction by utilizing the absorption reaction in the form of atomization by the nozzle 11 in the tank with respect to the outlet atmosphere. In this way, the alkaline liquid is completely neutralized and discharged harmlessly.

FIG. 3 is an example of a mixer installed in the apparatus of the present invention.

Reference numeral 14 in FIG. 3 is a bowl-shaped rigid body connected to the fluid supply port 15 and to the bolt 17 that sets the slit plate 16. Reference numeral 16 denotes a rigid slit plate, which is tightened with a nut 19 while keeping the bolt through hole airtight with a packing 18. When fluid is also supplied to the fluid supply port 15, the fluid mixed in the mixer becomes fine gas-liquid bubbles and is ejected into the tank from the entire circumference of the slit. At this time, the amount of fluid discharged from the slit increases or decreases depending on the pressure of the supplied fluid, so that the bowl-shaped body acts as a buffer and is uniformly discharged.

Each member constituting the apparatus of the present invention should be appropriately selected and used depending on the type of liquid 3 and gas to be treated and the operating conditions. For example, a rigid body such as metal or plastic is used for the supply pipe and the bowl-shaped cap, and a rigid metal, plastic, flexible rubber, elastic blank, or the like is used for the slit plate.

By using the device of the present invention, fluid contact such as absorption and removal of harmful components in exhaust gas or neutralization of waste liquid can be carried out efficiently with simple operations. A fluid contact device that combines a mixer and a dispersion nozzle that can adjust the amount of ejection and increase or decrease the ejection amount is highly effective for many purposes. Furthermore, since this device can be made small and compact, it can be conveniently used as a portable device.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one example of the device of the present invention, and FIG. 2 is a schematic diagram showing another example of the device. FIG. 8 is a schematic diagram showing an example of a mixer. Applicant: Hiroshi Sasaki, Representative of Steel Manufacturing Chemical Industry Co., Ltd.

Claims (2)

[Claims] (1) Consisting of an open tank and a mixer installed within the tank, the mixer is composed of a rigid bowl-shaped body connected to a fluid supply pipe and a plate in contact with the bowl-shaped body. A fluid contact device comprising a slit that ejects two fluids on the outer periphery between plates. (2) The sealed tank is divided into two upper and lower chambers, and the lower chamber is equipped with a mixer in the lower part, a plurality of dispersion nozzles and a fluid outlet in the lower part, and the mixer is a rigid bowl connected to a fluid supply pipe. The nozzle is composed of a bowl-shaped body and a plate in contact with the bowl-shaped body, and has a slit on the outer periphery between the bowl-shaped body and the plate for spouting two fluids. A fluid contact device with a structure that opens toward the outer periphery.