JPH0143570B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas dispersion device, and more particularly to a gas dispersion device with an improved method of attaching a gas blowing pipe to a gas distribution plate.

Conventionally, in gas dispersion devices that blow gas into a liquid or slurry through multiple gas blowing pipes attached to a gas distribution plate placed above the liquid level, the gas blowing pipes are welded or glued to the gas distribution plate. was fixed. If the gas blowing tube is made of metal, the gas distribution plate is also made of metal, and these are usually welded together.

By the way, exhaust gas from boilers, blast furnaces, etc. contains corrosive acid gases such as SOx, HCl, and HF, so even stainless steel does not have sufficient corrosion resistance.
Extremely expensive materials such as Hastelloy C276 and Inconelue 625 had to be used.

However, when welding a gas distribution plate made of these materials and a gas blowing pipe, there are many industrial problems such as distortion, high welding costs, and long construction times. Ta.

It was also considered to make the gas blowing pipe made of FRP, but it was difficult to connect it to the metal gas distribution plate, so it was made of stainless steel to prevent corrosion.
The only way to do this was to apply a lining made of FRP or other material and then bond and fix the lining to the FRP gas blowing pipe.

However, FRP lining has poor adhesion with stainless steel, and as will be explained later, when a side opening is provided in the gas blowing pipe, the glass fibers get in the way and are difficult to process, resulting in technical and economic problems. There were flaws.

Therefore, the present invention was made in order to eliminate such conventional drawbacks, and it solves the technical drawbacks associated with conventional welding and bonding, and has great economic advantages because the manufacturing cost is extremely low, and it is also extremely easy to manufacture. It has the advantage that it is easy to use and can also use materials such as polypropylene and polyvinyl chloride, which have excellent corrosion resistance.

In other words, the gas distribution device of the first invention includes a gas distribution tank, a gas distribution plate located in the upper part of the distribution tank and having an opening, and a bush inserted into the opening. a gas blowing pipe extending below the liquid level from the plate, a stopper is attached to the gas blowing pipe on the bush, and a stopper is attached to the gas blowing pipe below the gas distribution plate, the position of the gas dispersion pipe is fixed. The device is characterized in that it is provided with a support for fixing it.

Further, the gas dispersion device of the second invention includes a gas dispersion tank, a gas collecting plate located at the upper part of the dispersion tank and having an opening, and a bush inserted into the opening to pass through the gas collecting plate. and a gas blowing pipe extending below the liquid level from the plate, and a stopper is attached to the gas blowing pipe on the bush, and a stopper is attached to the gas blowing pipe below the gas collecting plate, and a position of the gas blowing pipe is fixed to the gas blowing pipe below the gas collecting plate. The device is characterized in that it is provided with a support for fixing it.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a schematic vertical cross-sectional view showing a first embodiment of the present invention, FIG. 2 is an enlarged view of the main parts thereof, and FIG. 3 is a cross-sectional view taken along the line A-A in FIG. is composed of a gas distribution tank 2, a gas distribution plate 3, and a gas blowing pipe 4.

The gas distribution plate 3 has a liquid level L at the upper part of the gas distribution tank 2.
Located at the top, an opening 5 is provided, into which a bush 6 is fitted.

The gas blowing pipe 4 passes through the bush 6 and extends below the liquid level L below the gas distribution plate 3, and a stopper 7 is attached to the gas blowing pipe 4 above the bush 6. Further, a support 8 is attached to the gas blowing pipe 4 below the gas distribution plate 3. The gas distribution plate 3 and the gas blowing pipe 4 are made of the same or different materials, and metal, metal lined with ERP or FRP, general-purpose plastic, etc. can be used as appropriate.

Further, the gas blowing pipe 4 is not limited to the case where the side opening 9 and the lower end opening 10 are provided as a gas dispersion mechanism as shown in FIGS. 1 and 2. It is also possible to attach a distributor using a porous material such as metal, a plate-shaped or pipe-shaped distributor with a large number of small holes, or to make the lower end a slit-shaped opening.

The shape of the opening 5 can be circular, square, rectangular, or other polygonal shape, and usually a shape matching the cross-sectional shape of the gas blowing pipe 4 is selected.

The bush 6 may be made of any flexible material such as natural rubber or synthetic rubber.
Moreover, the shape can be tapered as shown in FIG. 2, 6A, and the fit into the opening 5 and the gas sealing performance can be further improved. Further, it is also possible to apply a silicone sealant or the like to the contact surfaces on both sides of the bushing 6 or provide ring-shaped protrusions to further improve the gas sealing properties.

The stopper 7 is for preventing the gas blowing pipe 7 from falling off the bush 6 and is manufactured integrally with the gas blowing pipe 4 or is welded or glued to the gas blowing pipe 4. . The support 8 is made of metal or plastic, and is intended to prevent the gas blowing pipes 4 from swinging during gas dispersion. Adjacent gas blowing pipes 4 are connected to each other as shown in FIG. It is fixed to the wall of 2. The connection may be made not only linearly in one direction as shown in FIG. 3, but also in a grid pattern. The mounting position of the support 8 can be in the liquid, in the space between the gas distribution plate 3 and the liquid level L, or both, and is not particularly limited.

FIG. 4 is a schematic longitudinal cross-sectional view showing a second embodiment of the present invention, in which gas is discharged from the side opening 9 into the gas blowing pipe 4.
However, as in the first embodiment, the gas blowing pipe 4 passes through a bush 6 fitted into at least one opening 5 provided in the gas collecting plate 11. installed.

As described above, according to the present invention, the bushing is inserted into the opening provided in the gas distribution plate, and the gas blowing pipe is attached by passing through this bushing. No welding or gluing process is required at all, the gas blowing pipe can be installed extremely simply and easily, the construction period is significantly shortened, and the construction work is greatly reduced.
Further, since welding and adhesion are not required, it is also possible to use an extremely inexpensive gas blowing pipe made of polyvinyl chloride, polyethylene, etc., and the economic efficiency of the present invention can be further improved.

Furthermore, since a bushing is used, there is no stress concentration at the attachment point between the gas blowing pipe and the gas distribution plate or gas collecting plate, which can occur when welding or gluing, which can cause corrosion or cracks. Improves safety and durability.

Furthermore, the gas blowing pipe is equipped with a stopper and a support to prevent it from falling off from the bushing, and to keep the gas in the liquid at a constant distance from the gas blowing pipe under predetermined conditions. can be dispersed into

Therefore, the device of the present invention is extremely suitable as a gas dispersion device for treating a large amount of exhaust gas, especially because of its excellent economy.

[Brief explanation of drawings]

Fig. 1 is a schematic vertical cross-sectional view showing a first embodiment of the present invention, Fig. 2 is an enlarged view of the main part thereof, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, and Fig. 4 is a schematic diagram of the present invention. FIG. 3 is a vertical cross-sectional view showing a second embodiment of the invention. 2... Gas dispersion tank, 3... Gas distribution plate, 4... Gas blowing pipe, 5... Hole, 6, 6A... Bush, 7... Stopper, 8... Support, 11... Gas collecting plate.

Claims (1)

[Scope of Claims] 1. A gas dispersion tank, a gas distribution plate located at the upper part of the dispersion tank and having an opening, and a bush inserted into the opening to pass through the gas distribution tank and the liquid flowing downward from the gas distribution plate. a gas blowing pipe extending below the surface, a stopper is attached to the gas blowing pipe on the bush, and a support for fixing the position of the gas blowing pipe is attached to the gas blowing pipe below the gas distribution plate. A gas dispersion device characterized by being provided with. 2. A gas dispersion tank, a gas collecting plate located at the upper part of the dispersion tank and having an opening, and a gas blowing pipe extending below the liquid level from the gas collecting plate through the bushing inserted into the opening. A stopper is attached to the gas blowing pipe on the bush, and a support is provided on the gas blowing pipe below the gas collecting plate to fix the position of the gas blowing pipe. Gas dispersion device.