JP3063052B2 - Sealing tank for membrane degassing type pipe corrosion protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water sealing tank of a membrane degassing type pipe anticorrosion device.

[0002]

2. Description of the Related Art Conventionally, there is known a membrane degassing type pipe anticorrosion apparatus for degassing a water supply pipe in order to prevent a water pipe from being corroded mainly by dissolved oxygen dissolved in the water. This pipe corrosion prevention device is configured by connecting a water-sealed vacuum pump with a water-sealing tank to a membrane deaerator. This vacuum pump is operated while circulating the sealed water with the sealed tank, mixing the degassed dissolved oxygen with the sealed water, and discharging the dissolved oxygen as a degassed gas to the sealed tank together with the sealed water. is there.
In addition, the water sealing tank also serves as a gas-liquid separation device, where the degassing gas is separated from the sealing water and scattered into the air, and after the degassing process is completed, the sealing water is again evacuated from the water tank. I was returning to the pump.

At the time of this degassing, the water in the water sealing tank rises and bursts in the water of the water sealing tank while the gas bubbles of the gas are large, so that noise is generated or metal generated in the vacuum pump is generated. When noise such as sound is transmitted or is present in bubbles, when the bubbles burst, the noise is generated in the water sealing tank in synergy with the bursting sound. In addition, foaming on the water surface has increased, and it has been difficult to accurately detect the water surface of the sealed water in the water sealing tank. Conventionally, a silencer has been used to prevent this noise and the like.
This silencer is a cylindrical container having a long and large diameter, which is formed such that a water pipe communicating with a discharge port of a vacuum pump is connected to the silencer so that the sealed water is spirally circulated in the silencer. Met. In the course of this circulation, the degassed gas in the sealed water is separated from the sealed water and dissipated, thereby preventing generation of noise and the like.

[0004]

The conventional silencer is effective in preventing noise and the like when separating degassed gas and water in a water sealing tank. However, there is a problem that an installation place is limited because a large water sealing tank is required. For example, there is a problem that it is difficult to install the device in a place where space is limited, such as the roof of an apartment house or office building. In order to operate the vacuum pump efficiently, it is necessary to keep the amount of sealed water in the vacuum pump constant. Since the amount of water is determined by the height of the sealed surface in the sealed tank, there has been a problem that a sealed tank capable of preventing foaming and accurately detecting the height of the sealed surface has been desired. Further, there is a problem that a water sealing tank of a membrane degassing type pipe anticorrosion device which can be installed in the above-mentioned limited space and does not generate noise or the like is desired.

An object of the present invention is to provide a water-sealing tank for a membrane degassing type pipe anticorrosion system which is compact, has low noise, is excellent in deaeration efficiency, and has a high operation efficiency in order to solve the above problems and problems. And

[0006]

In order to achieve the above object, the water sealing tank of the membrane degassing type pipe anticorrosion system of the present invention has an exhaust pipe communicating with a vacuum pump of the membrane degassing type pipe anticorrosion system at the bottom. And a bubble dispersion plate having a large number of small through holes is provided above the exhaust pipe, and a partition plate positioned on the water surface is provided above the bubble dispersion plate. The partition plate is a horizontal portion of a plate material bent in an inverted L shape,
Two plate members having different heights of the partition plates are arranged so as to face each other such that the respective partition plates are arranged vertically, and between the opposed vertical portions.
The above-mentioned bubble dispersing plate is erected and discharged from the exhaust pipe.
Bubbles are formed by both horizontal and vertical sections above the water surface.
The water level detector is placed outside the space formed by the two opposing plate members.

[0007]

FIG. 1 shows a water sealing tank of a membrane degassing type pipe anticorrosion apparatus of the present invention and a membrane degassing type pipe anticorrosion apparatus provided with this water sealing tank. Reference numeral 6 in the figure denotes a membrane deaerator.
This membrane deaerator 6 is connected to a vacuum pump 1 through a vacuum conduit 18.
This membrane degassing type pipe anticorrosion device is connected.
Sealed water is sealed in the vacuum pump 1, and its outlet is connected to an exhaust pipe 3 (described later) in a sealed tank 12 through a conduit 11.
It is communicated to. In addition, a conduit 10 for returning the sealed water 8 retained in the water sealing tank 12 to the vacuum pump 1 is connected, and the conduit 10 is connected to a suction port of the vacuum pump 1. A circulation path for the sealed water 8 is formed between the vacuum pump 1 and the sealed water tank 12. Also,
A pneumatic cooler 2, a fan for cooling the pneumatic cooler 2, and a temperature sensor (not shown) for detecting the temperature of the sealed water 8 flowing in the conduit 10 are provided in the middle of the conduit 10.
The water sealing tank 12 is provided with a water supply device (not shown) via a conduit 20, and the conduit 20 is provided with an electromagnetic valve 13. The overflow discharge pipe 14 and the water level of the sealed water 8 are detected. A water level detector 15 is provided. The output of the water level detector 15 is connected to the electromagnetic valve 13 to maintain the water level of the sealed water 8 at a fixed position (the position of the overflow drain 14). Further, an exhaust port 9 is provided in the water storage tank 12.

At the bottom of the water sealing tank 12, the above-described exhaust pipe 3 is provided.
The exhaust pipe 3 has a plurality of small openings 21 formed therein. In the drainage tank 12, the bubble dispersion plate 4 is disposed at a position above the exhaust pipe 3 and at an intermediate position of the water sealing tank. A large number of small through holes 22 are formed in the bubble dispersion plate 4.
Are dispersed. In the illustrated embodiment, the two bubble dispersing plates are vertically arranged apart from each other, but only one bubble dispersing plate may be arranged, or three or more may be arranged. On the upper part of the water sealing tank 12, two partition plates 5, 5 are provided vertically separated.
The partition plates 5 and 5 are horizontal portions of a plate material bent in an inverted L shape, and two plate materials having different heights from the partition plates 5 and 5.
Are arranged facing each other so that the respective partition plates 5 and 5 are up and down.
The bubble dispersion plate is placed between the opposed vertical portions 5a, 5a.
4 is erected, and the whole is integrally formed so that it can be erected in the water sealing tank. This partition plate 5,
Numeral 5 is for preventing water droplets from scattering when bubbles are broken. As shown in the drawing, the exhaust pipe 3 is arranged between the vertical portions 5a of the partition plates 5, 5, so that air bubbles discharged from the exhaust pipe 3 are sealed between the vertical portions 5a, 5a of the partition plate. The water level detector 15 is connected to the vertical portion 5a.
And the water level detector 15 is not affected by air bubbles.

The membrane deaerator 6 includes a main water pipe in the facility,
For example, it is provided in a main water pipe 17 attached to a rooftop water storage tank of a high-rise building. The membrane degassing device 6 is provided with a degassing membrane module 16 having an airtight structure. The degassing membrane module 16 has a huge number of extremely small-diameter hollow fiber membranes 19.
It consists of. Tap water in the water pipe 17 flows through the central through holes of each of the huge number of hollow fiber membranes 19. The degassing membrane module 16 is connected to the suction port of the vacuum pump 1 via a vacuum conduit 18 to cooperate with the water ring vacuum pump 1 and the membrane deaerator 6 to remove oxygen dissolved in tap water. I care. Instead of the water pipe, a membrane deaerator may be attached to a water pipe other than the tap water to degas dissolved oxygen or the like from industrial water, for example.

When the operation of the vacuum pump 1 is started, the pressure of the deaeration membrane module 16 of the membrane deaerator 6 is reduced via the vacuum conduit 18, and at the same time, the dissolved oxygen in the tap water flowing through the central through hole of the hollow fiber membrane 19. Passes through the hollow fiber membrane 19, becomes the degassed gas 7, and is sucked into the suction port of the vacuum pump 1 through the vacuum conduit 18. In the vacuum pump 1, this degassed gas 7
Is mixed with sealing water and sent from a discharge port as sealing water 8 through a conduit 11 to an exhaust pipe 3 provided in a sealing tank 12.

The sealing water 8 diffuses upward from the small opening 21 of the exhaust pipe 3, and the degassed gas 7 becomes bubbles 23, hits the bubble dispersion plate 4, and is dispersed into many fine bubbles. Since this dispersing operation is performed efficiently, an aggregate of microbubbles is formed on the water surface of the sealing water 8, preventing explosion of large bubbles, and exerting an effect of silencing the microbubbles. That is, by gathering between the vertical portions 5a, 5a of the partition plate as an aggregate of a large number of microbubbles, not only does the function of suppressing the rising noise of the bubbles, but also the plosive sound generated when the bubbles burst while the bubbles are large. Will be lost. In addition, by forming an aggregate of microbubbles,
The noise generated in the vacuum pump inside the air bubbles is also scattered to a small extent, and the noises dispersed in a large number act to cancel each other out, thereby exhibiting a large noise reduction effect. The large number of microbubbles burst on the surface of the water and scatter as water droplets. The partition plate 5 disposed on the surface of the water prevents the water droplets from scattering. On the other hand, since the water level detector 15 is arranged outside the vertical portion 5a of the partition plate 5, the water level detector 15 is located on a quiet water surface without being affected by rising bubbles or aggregates of microbubbles. Water level detection is performed.

[0012]

According to the present invention, the water sealing tank of the membrane degassing type pipe anticorrosion apparatus is provided with an exhaust pipe communicating with a vacuum pump, a bubble dispersion plate is disposed above the exhaust pipe, and a partition plate is further disposed above the exhaust pipe. Since it is installed and separates degassed gas mixed with the sealed water, the degassed gas discharged from the vacuum pump can be efficiently separated from the sealed water using almost the entire capacity of the sealed tank. In addition, the entire water sealing tank can be configured compactly. In particular, the deaeration gas bubbles in the water sealing tank are aggregated into a large number of microbubbles, so that not only the bursting sound of the bubbles but also the function of eliminating the noise generated by the vacuum pump is exhibited, and the soundproofing effect is achieved. It has a high sealing tank and a great effect. Further, since the water level detector is arranged at a position not affected by the bubbles, there is an effect that the water level can be always controlled appropriately.

Therefore, the water sealing tank of the present invention has an effect that the operation of the membrane degassing type pipe anticorrosion apparatus can be efficiently and stably performed, and the membrane degassing type pipe anticorrosion can be performed even in a place where space is limited. This has the effect that the device can be installed. In addition, since interference factors such as generation of noise and scattering of water droplets can be eliminated, there is no negative influence of noise or the like on the periphery,
This has the effect of making it possible to provide a membrane degassing type pipe corrosion prevention device that is easy to maintain.

[Brief description of the drawings]

FIG. 1 shows a water-sealing tank of a membrane degassing type pipe anticorrosion device of the present invention;
Block diagram showing a membrane degassing type pipe anticorrosion device equipped with this water sealing tank

FIG. 2 is a perspective view showing the water sealing tank shown in FIG. 1;

FIG. 3 is an explanatory view of the water sealing tank shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum pump 2 Cooler 3 Exhaust pipe 4 Bubble dispersion plate 5 Partition plate 6 Membrane deaerator 7 Deaerated gas 8 Water sealing 9 Exhaust port 10, 11 Pipe 12 Water sealing tank 13 Electromagnetic valve 14 Drainage pipe 15 Water level detector 21 Small opening 22 Small through hole

Claims (2)

(57) [Claims] An exhaust pipe communicating with a vacuum pump of a membrane degassing type pipe anticorrosion device is provided at a bottom, and a bubble dispersion plate having a large number of small through holes is provided above the exhaust pipe. A watertight tank for a membrane degassing type pipe anticorrosion device, characterized in that a partition plate positioned on the water surface is provided above the water. 2. The partition plate is a horizontal portion of a plate material bent in an inverted L-shape, and two plate materials having different heights of the partition plate are opposed to each other so that the respective partition plates are vertically arranged. Then , the above-mentioned bubble dispersion plate is erected between the opposed vertical portions, and
The air bubbles discharged from the exhaust pipe are transferred to both horizontal sections on the water surface.
2. The water sealing of a membrane degassing type pipe anticorrosion system according to claim 1, wherein the water stays in a space formed by the two vertical members and a water level detector is disposed outside the space formed by the two opposing plate members. tank.