KR840002175Y1 - Apparatus for introducing gas into solution - Google Patents

Abstract

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Description

Gas injection device into liquid material

1 is a partial schematic cross-sectional view of a water treatment tank with two devices according to the present invention for injecting gas into liquid material in a water treatment tank.

2 and 3 are partial schematic vertical cross-sectional and horizontal cross-sectional views of a device for mounting a hood on top of a flue tube according to the present invention.

4 and 5 are vertical and horizontal cross-sectional views similar to FIGS. 2 and 3, respectively, with the exception of other devices (7) for adjusting the hood mounted on top of the duct tube.

6 and 7 are vertical and horizontal cross-sectional views similar to FIGS. 2 and 3, except that the apparatus for installing the hood on top of the duct tube is different.

FIG. 8 is a cross-sectional view of another device for adjustablely mounting the hood on top of the duct tube.

9 and 10 are vertical cross-sectional and horizontal cross-sectional views similar to FIGS. 2 and 3, respectively, except for a device for adjusting the relative position between the bottom end of the hood and the top end of the flue tube.

11 and 12 are a front view and a plan view showing a modified embodiment of the present invention, respectively.

The present invention injects a gas, such as air, oxygen, or methane into a liquid material at a certain depth or a special depth, and injects a gas into the liquid water so as to diffuse the gas into the liquid to obtain the required mixing and homogenization effect. It is about.

This device can be particularly useful for sewage treatment apparatus including activated sludge. However, the scope of the present invention is applicable to any type of device requiring gas diffusion at any depth.

Background Art [0002] There is known a device for diffusing air into a water treatment tank comprising activated sludge, in particular a device of the type immersed in liquid. In this type of device, air is blown out of the atmosphere by a compressor through a pipe device which injects air in the form of fine bubbles into the liquid. When using such a device it is possible to achieve high delivery, ie adequate homo enization of the liquid material, and sufficient mixing capacity for the solid material to be suspended in the liquid material and to the liquid in the form of dissolved maximum gas. In addition, for activated sludge systems, a compromise between high transfer rates, which is a very important characteristic, is required. Furthermore, energy consumption must be kept to a minimum.

The simplest known method for injecting gas into a liquid uses a tubing or pipe device which is immersed horizontally in the liquid to supply gas such as air, and the gas is provided at regular intervals in the pipe device through the perforated holes. It is released freely. When the freely released gas rises toward the surface of the liquid, a portion of the gas, for example oxygen, is passed into the upward flow, causing the circulation of the liquid material with the synergistic effect of the low density emulsion part. This type of device has the disadvantage of having low energy transfer rates and the disadvantage of insufficient mixing, especially at the bottom of the tank, when only low gas demand or reduced gas flow is required.

In other conventional devices, the degree of mixing could be improved without increasing the gas flow.

The device consists of a vertical tube whose ends are opened and a passage of injected gas is formed to act as an oil pump to form a substantial gas passage.

This type of device allows the flow of air or other gases to readily pick up and recycle liquid materials at lower positions as compared to conventionally mentioned conventional devices. However, the device has a higher rate of delivery than gas transfer from a higher position flow in the tube, for example oxygen transfer, as soon as the bubble remains in the liquid material, the bubble rises more quickly to the open top side of the liquid Therefore, it is weakened and is not good.

The third type of the known device includes an effluent tube inside, and various types of baffles are installed to promote flow and cause load loss in order to increase the residence time of bubbles in the liquid material. have. Thus, delivery of gases such as oxygen is improved.

However, these devices have drawbacks in gas flow from the tubing, which limits their pumping and mixing capabilities.

In view of this conventional technology, the object of the present invention is to solve the shortcomings of the prior art and improve the gas delivery to improve the efficiency of energy use and to inject gas into the liquid material at any depth capable of maintaining a high pumping flow rate. An improved device is provided.

This object is achieved in accordance with the present invention by the provision of a device for injecting gas into the liquid material, which device comprises an emulsion tube which is immersed in the liquid material and vertically aligned in a row on the gas outlet.

Underneath the opening of the tube, gas and liquid from the gas outlet are taken in and the gas and liquid are suspended in flow upward through the tube. The upper portion of the tub is formed with an opening for reversing the rising gas-liquid emulsion to be discharged downward in the liquid material.

In one embodiment of the present invention, the reversal and discharge structure is installed on the top of the tube, facing the upper open end, and hood mounted to block the gas-liquid emulsion passing outwardly and downward in the liquid material. ).

The hood is opened downward in the liquid material around the circumference of the upper open end of the tube and the diameter of the hood is larger than the diameter of the tube. The tubing extends upwardly into the hood at less than the total vertical depth inside the hood, preferably 0-5% of the total height of the hood. The vertical height inside the hood minus the extension distance of the tubing extending into the hood is approximately half the diameter of the hood. Various devices adjust the vertical position of the hood relative to the tube, in particular to adjust the extension distance of the upper open end of the tube above the hood, ie to adjust the relative vertical distance between the bottom of the hood and the top of the tube. Can be provided to do so.

In a briefly embodied embodiment of the present invention, the inversion and discharge structure comprises a curved portion on the upper side of the tube, the tube extending downward from the overflow and the first portion extending upward in the overflow. An extended second portion, the second portion having a downward opening. The emulsion flows upwardly through the first portion and then flows downwardly through the second portion beyond the overflow and is discharged downward into the liquid material through the opening. The vertical distance between the overflow and the opening is preferably 0-5% of the total height of the tub.

Referring to the present invention in more detail based on the accompanying drawings as follows.

Figure 1 shows one use of the present invention, the present invention will be described thereby. This shows the water treatment tank including the bottom of the tank and containing the liquid material therein.

As used herein, the term "liquid substance" simply refers to a liquid, such as a mixture of liquid and sediment or any form of particulates, as is well known to those skilled in the art, especially as known in the sewage treatment art. will be. The gas supply tube 4 is immersed in the liquid material and extends adjacent to the tank bottom 5, and a hole 3 is formed to form a gas outlet for injecting gas into the liquid material. The effluent tube 1 is located in the liquid material and is energized perpendicularly to the top of the hole 3. In FIG. 1, the holes 3 are laid in two places, and the duct tube 1 is vertically erected on the upper part of the group of each hole 3.

Of course, the scope of the present invention will be understood to include the use of a single tube (1) or two or more tubs. The tube 1 is supported in the support 6, and the support 6 supports the gas supply tube 4. The support 6 has a sparse hole as shown in FIG. 1 so that liquid inflow into the tub 1 is not obstructed.

The tube 1 has a lower open end for receiving gas from the hole 3 and liquid from the bottom of the liquid substance. The gas and liquid forming the gas-liquid emulsion thus flow up through the interior of the tub 1.

It can be seen that in the device shown in FIG. 1 a hole 3 is laid in the lower part of the tube 4. They cause gas pressure to be lost so that all gases in the tubing 1 are equally distributed. Gas freely released from the hole 3 passes through the tub 1 and liquid from the bottom of the tank also flows to the bottom of the tub 1. This is to bring about the emulsion pumping effect to generate the hydraulic energy required for the continuous backflow of the emulsion according to the present invention.

In this way, the upper part of the tub 1 has an open structure downwardly into the liquid material to reverse the flow of the emulsion and then discharge the emulsion downward into the liquid material.

According to the embodiment of FIG. 1, this reversal and discharge structure is in the form of a hood 2 which wraps on the upper open end of the tube at the top of the tube 1 and picks up the emulsion to be lowered into the liquid material. . The hood 2 may take many different forms depending on the material used, for example, in the form of a cylinder with a flat bottom surface made of metal or reinforced concrete, or a rounded shape in which the upper end is spherical or elliptical in rigid synthetic resin. The diameter of the hood 2 is preferably 1.5-2 times the diameter of the tube 1. The upper end of the tube 1 is smaller than the vertical inner depth p of the hood 1 and is preferably adjustable, the length of the hood being equal to 0-5% of the total height of the tube. Entered vertically inside. The total vertical inner depth p of the hood is such that p-h is half the diameter of the omitted tubing. In this hood, the emulsion is intercepted, greatly alternating, and moving downwards from the bottom of the hood, causing bubbles to descend at a rate of about 1 meter per second.

The hood 2 can be mounted on top of the tube 1 as a convenient structure. Several of these devices will be described as FIGS. 2-10.

In FIGS. 2 and 3 the hood is mounted on the outer side of the flue tube 1 as a radially extending wing 7 connected to or connected to the tube. Alternatively, some wings may be connected to the hood and some may be connected to the tube. The arrangement and shape of this wing 7 may be required or varied depending on convenience. For example, the vane is zero from vertical to allow the flow of emulsion discharged downward from the hood to be rotated or twisted. -45 It can take the form of a sloping spiral, allowing the whole to be excreted in the hood or partially extended under the hood. This increases the orbital length of the released and downwardly flowing emulsion, increasing the time that bubbles remain in the liquid.

At the end of the hood a hole may be provided with a deflector to allow gas to be released into the liquid above the hood and for distribution of the gas.

It is advantageous to make the relative vertical position of the hood relative to the tube, such a system being shown in FIGS. 4 and 5. Here, the radial blades 8 are mounted on the outer wall of the tub 1 and the other radial blades 8a are mounted on the inner wall of the hood. The blade 8 is formed with a slot 9 from which the mounting device 10 extends to secure the blades in the selected vertical position.

6 and 7 show that one wing 11 of the tubing 1 is located between the two wings 12, 12a of the hood.

This arrangement may be reversed so that the vanes 11 are mounted on the hood 2 and the two vanes 12, 12a are mounted on the tubing.

8 shows a device for adjusting the distance h without interrupting the operation of the device. The control rod 13 is connected to the upper part of the hood 2, so that the upper structure 14, such as a platform, can be operated without interruption of operation. A spiral is formed at the upper end 13a of the control rod 13 and penetrates through the clamp 15 to be screwed as an adjusting nut 16 and a fixing nut 17. The control rod 13 passes through the platform 14 through the sleeve 18 provided with the sealing device. Accordingly, by manually adjusting the nuts 16 and 17 with respect to the spiral end portion 13a of the control rod 13, the hood 2 can be raised and lowered without interruption of operation.

As in FIG. 8, the entire hood is adjustable. However, the distance h may be adjusted while the hood 2 is fixed. Such a structure is shown in FIGS. 9 and 10, wherein a reject 19 is provided on the bottom of the hood. Rejection 19 is supported on support 20, which is connected by cable 21 to be controlled in a similar manner to control rod 13 in FIG. 8.

As the hood of the above-mentioned material is configured in various forms, the duct tube 1 may also be molded from various materials such as galvanized steel, stainless steel, concrete or plastic. The material of the tubing may be different from the material used for the hood, especially when large.

11 and 12 show a simplified embodiment of the present invention. In this embodiment, the reversal and discharge structure is not in the form of a detachable hood but in the form of a curved portion 22 formed on the top of the tube 1. This tubing 1 flows upward through the first portion extending vertically from the hole 3 to the overflow and the first portion extending downward from the overflow, and then the second portion beyond the overflow. Flows downward through the opening and into the liquid material. As shown in FIG. 11 and FIG. 12, the relative direction of the curved portion 12 and the release of the emulsion can be changed in the liquid material by simply rotating the tub 1 without moving to the tub 1. As shown in FIG. 11, the vertical spacing h between the overflow or the opening may be 0-5% of the total height of the tube 1.

In the device according to the present invention, the gas transfer is improved, the energy efficiency is improved, and high pumping flow is maintained. In fact, a hood mounted on top of the effluent tube causes the emulsion to reverse its flow direction at the tube outlet. The emulsion leaves the hood vertically downward at a rate of about 1 meter per second, causing them to reach zero speed until bubbles rise towards the surface of the liquid. However, in the conventional apparatus, the vertically upward flow rate of the emulsion leaving the effluent tube is 2 m per second in known effluent tubes and 0.7 m per second in perforated tubs. Therefore, in the present invention, the bubble trajectory and bubble retention time in the liquid material is improved and the gas transfer effect is improved. Strong alternating current occurs in the hood 2 or band 22 band.

When the hood 2 is used, the bubbles are widely distributed in the horizontal region so that the bubbles rise directly vertically after leaving the duct tube, and are better diffused in the liquid material with respect to the prior art which constrains coalescence.

The trajectory of the bubble drawn along the hood increases the time the gas stays in the liquid, which in turn increases the gas transfer effect by almost 20% greater than that of conventional devices. Improved distribution of air bubbles deep within the liquid material is achieved by reversing the flow direction of the emulsion leaving the effluent tube, which also promotes and improves the retention of solids in the liquid material.

Claims (1)

Injecting gas into the liquid substance, the gas supply tube (4) having a gas discharge hole (3) in the treatment tank (5) containing the liquid substance to be treated horizontally installed, the gas supply tube To the upper side of the gas discharge hole 3 of the woofer 4 is installed an emulsion tube having a vertically upward condensate passage, and on the upper side of the emulsion tube 1 is a gas and a liquid. The hood 2 is installed as a reversing and releasing means for reversing the effluent flow of the effluent to discharge it downward, and the vertical distance h between the upper end of the effluent tube 1 and the lower opening of the hood 2 is Apparatus for injecting gas into a liquid substance, characterized in that it is 0.5% of the total height of the emulsion tube (1).