JPH0368439A - Liquid mixing device - Google Patents

Abstract

PURPOSE:To improve the mixability by introducing a liquid and a gas into the clearance between a casing and a circumferential body to mix them and discharging them into another liquid. CONSTITUTION:The switch of a motor 10 is turned on to revolve the circumferential body 1 and a screw 23. When valves 8, 9 are opened, the liquid 15 and air are introduced respectively from a pouring port 6 and from an air taking-in port 7 into the clearance 3 formed between the casing 2 and the circular pillar body 1, mixed while flowing down in the clearance 3 by the action of the screw 23, and discharged into another liquid 20 after the liquid 15 and air are sufficiently mixed. The bubbles and the liquid 15 are brought into collision with the bottom 21 and scattered into the liquid 20 in every direction. By this method, plural liquids are sufficiently mixed.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a liquid mixing device used to mix wastewater and a purified liquid, for example, when purifying wastewater or sewage. [Prior Art] Waste water and sewage from homes and factories are discharged into sewers or rivers either as they are or after being purified to some extent. These are rivers, swamps,
It turns into sludge in lakes and oceans, causing foul odors and threatening the survival of fish and other creatures that live there. If left unchecked, rivers and oceans will die, threatening not only the creatures that live there but also the ecosystem, including humans, and threatening the survival of humans. To prevent this, septic tanks are installed in each home and factory, and large amounts of wastewater are purified at sewage treatment plants. [Problems with conventional technology] In septic tanks and sewage treatment plants, wastewater and sewage are purified by mixing or stirring chemicals and bacteria, but conventional mixing devices of the blower type that rotate water wheels do not clean the wastewater, etc. Merely stirring the surface is not sufficient to mix the chemicals and bacteria; however, with the ejector method, which injects chemicals and bacteria from the bottom of the septic tank along with compressed air from a compressor, the air bubbles become large and quickly rise to the surface, resulting in insufficient mixing. First, both of them had the problem that they were unable to fully demonstrate the purifying action inherent in the chemicals and bactetata. [Object of the Invention] The present invention has been made to solve the above-mentioned problems, and provides an inexpensive liquid mixing device that can sufficiently mix chemicals having a purifying effect into liquids such as wastewater and sewage. The aim is to provide [Structure of the Invention] For the above purpose, in the present invention, gas and a first liquid are introduced into the gap between the cylindrical body and a casing provided to cover the circumferential surface of the cylindrical body, and The gas and the first liquid are mixed by rotating, and the mixed substance is released into the second liquid, so that the first liquid and the second liquid are mixed.
. [Embodiments of the Invention] Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a schematic sectional view of a liquid mixing device according to an embodiment of the present invention. A motor 10 is connected to the upper part of the cylindrical body 1 via a joint 11, and a screw 23 is connected to the lower part.
The cylindrical body 1 to which the cylindrical body 1 is attached is provided with a casing 2 having a shape that covers the circumferential surface of the cylindrical body 1 and is concentric with the cylindrical body l, and there is a gap between the cylindrical body 1 and the casing 2. 3
is formed. The casing 2 is provided with an air intake 7 and an inlet 6 for the first liquid 15. A knob 12 is connected to the air intake port 7 via a valve 9, from which air flows in, and the inlet port 6 is also connected to a valve 8.
A vibrator 13 is connected to the liquid 15 from the container 14 through the
will flow in. Hereinafter, the operation of the liquid mixing device shown in FIG. 1 will be explained in detail. When the switch of motor 10 is turned on, motor 10
The cylindrical body l and the screw 23, which are mechanically connected to each other, start rotating. When the jib 8.9 is opened, liquid 15 is introduced from the inlet 6 and air is introduced from the air intake 7 into the gap 3 formed between the casing 2 and the cylindrical body 1. The air and liquid 15 taken into the gap 3 flow downward in the drawing through the gap 3 by the action of the screw 23 attached to the lower part of the cylindrical body l. The liquid 15 becomes a whirlpool under the influence of the rotational force of the cylindrical body 1 and moves downward in the drawing within the gap 3. As shown in the enlarged view of the gap 3 in FIG. flows in the direction of rotation of the cylinder 1, but it is faster near the cylinder l and slows down near the casing 2. Combined with this and the centrifugal force due to the rotation of the cylinder l, a complicated flow occurs as shown by the arrow in Figure 2. This results in a turbulent flow. The air and liquid 15 are not mixed very much near the air intake port 7 and the inlet port 6, but due to the turbulent flow described above, the air gradually becomes smaller as if broken, and when released from the outlet port 4, it becomes a cylindrical body. Although it depends on the conditions such as the number of revolutions of the engine, it is possible to make the bubbles smaller than 1/1000 [α] of lO. When the air and the liquid 15 are sufficiently mixed, the air bubbles become wrapped in the liquid 15, just like soap bubbles, and are released into a second liquid 20 that is separate from the liquid 15. become. These bubbles and the liquid 15 hit the bottom 21 and are scattered in all directions in the liquid 20. Air bubbles are 1/1000th of lO

[0] or less, they are in the form of fine particles and have very low buoyancy. Therefore, the released bubbles do not float to the surface immediately, but float in the liquid 20 for a long time. No matter how small these bubbles are, they are buoyant and gradually rise. What surrounds the bubbles is liquid 15, which is liquid 20.
If the bubbles float inside for a long time and rise, liquid 15 becomes liquid 20.
When it is sufficiently mixed and dissolved, it becomes. That is, the air bubbles mixed with the liquid 15 by the liquid mixing device play the role of transporting the liquid 15 in order to mix the liquid 15 into the liquid 20 sufficiently and evenly. The means described in the prior art for sufficiently mixing a small amount of liquid 15 with a large amount of liquid 20 have not been able to mix the liquid 15 into the entire liquid 20, even if the liquid 15 can be mixed partially. . This is particularly effective when the specific gravities of liquid 15 and liquid 20 are significantly different. When the liquid 20 is household or factory wastewater and the liquid 15 is an aerobic bacterial culture to purify it,
The air bubbles not only transport the liquid 15, but also supply oxygen to the liquid 20 to keep bacteria alive. Rivers and the like that are being purified generally lack oxygen, and in such cases, air bubbles play multiple roles, supplying oxygen to fish and other animals living there. If oxidation of the liquid 15 and the liquid 20 would be inconvenient, an inert gas such as argon gas may be used instead of air. The liquid mixing device shown in FIG. 3 shows a different embodiment from that shown in FIG. There is. According to the liquid mixing device shown in FIG. 3, air, liquid 15, and liquid 20 are sufficiently mixed in the space i3 between the casing 2 and the cylindrical body l, and are discharged from the outlet 4. Become. Liquid 15 and liquid 2 are mixed in the liquid mixing device shown in Figs. 1 and 3.
The degree to which 0 is mixed depends on the use of these liquid mixing devices, but it is possible to increase the distance from the inlet 6 to the outlet 4 of the liquid 15, increase the rotation speed of the cylindrical body 1, increase the diameter of the casing, etc. The narrower the gap 3 between 2 and the cylindrical body, the higher the degree of mixing of both liquids 15.20,
If the distance from the inlet 6 to the outlet 4 of the liquid 15 is shortened or otherwise, the degree of mixing will be lowered. The liquid mixing device shown in Figures 1 and 3 shows the case of mixing air and two liquids 15.20, but even when mixing more liquids, the number of inlets corresponding to the number of liquids 15, 20 is mixed with the casing 2. It is possible to mix a large number of liquids by providing a The liquid mixing device shown in FIGS. 1 and 3 is constructed of members that are easy to process, and one of its advantages is that it can be provided at low cost. In the above embodiment, the case where the liquid mixing device is mainly used in a purification device was explained, but the present invention is not limited to this, and can be used in any case where multiple liquids need to be mixed, such as food, drinks, dyes, etc. Applicable to any case. [Effects of the Invention] By having the configuration as described above, the present invention can provide a liquid mixing device capable of sufficiently mixing a plurality of liquids at a low cost.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, in which FIG. 1 is a schematic sectional view of a liquid mixing device, FIG. 2 is an enlarged view showing turbulent flow of liquid etc. in a gap, FIG. 3 is a schematic sectional view of a liquid mixing device different from FIG. 1. Regarding the symbols shown in the drawings, 1. Cylindrical body 2. Casing 3. Gap 4. Outlet 6. Inlet 7. Air intake 8.9.
Valve 12.13...It is a pipe. Figure 1

Claims (1)

[Claims] (1) Gas and a first liquid are introduced into the gap between the casing and the cylindrical body, which are provided to cover the circumferential surface of the cylindrical body, and as the cylindrical body rotates, the gas and the first liquid A liquid mixing device characterized in that the first liquid and the second liquid are mixed by mixing the first liquid and discharging the mixed liquid into the second liquid. .