JPH0753694Y2 - Mist recovery device with twisted plate insertion tube - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for recovering mist from exhaust gas containing mist such as water and oil.

[0002]

2. Description of the Related Art Conventionally, as means for removing mist from exhaust containing mist in steam, rolling oil, etc. generated from roll coolant during rolling of aluminum sheet, a device for removing mist through several kinds of filters, A device for passing exhaust gas between corrugated plates arranged side by side, a device using a cyclone, and the like are known.

Furthermore, recently, as shown in FIGS. 5 and 6, a large number of exhaust passage pipes 2 each having a twisted plate 1 therein are arranged in parallel between upper and lower pipe plates 14 in a shell 5, and both ends thereof are piped. Board 14
There has been proposed a device that penetrates through and opens inside the upper casing 3 and the lower casing 4.

In this device, the exhaust gas that has entered the upper casing 3 enters the exhaust passage pipe 2 and comes into contact with the inner walls of the twisted plate 1 and the exhaust passage pipe 2 while forming a passage formed by the twisted plate and the inner wall of the exhaust passage pipe. After flowing down in a swirling flow, the mist is deposited and separated on the surface of the torsion plate 1 and the inner wall of the exhaust passage pipe 2, then enters the lower casing, passes between the louvers 6, passes through the blower, and passes through the filter 8 to form fine particles. After the mist is separated, it is released from the exhaust stack 10 into the atmosphere.

However, in this device, most of the mist that has passed through the exhaust passage pipe 2 is separated from the mist in the exhaust passage pipe 2 and flows down inside the mist, and the mist of the lower casing 4 is discharged from the outlet of the passage pipe 2. It was a problem that part of the mist that dropped to the bottom was discharged along with the exhaust flow.

[0006]

SUMMARY OF THE INVENTION According to the present invention, after the mist is separated from the exhaust gas that has passed through the exhaust passage pipe, and the exhaust gas flows out from the lower casing, the mist is small and easy to handle, and the recovery efficiency is high. The present invention is intended to provide a recovery device.

[0007]

The constitution of the present invention for solving the above-mentioned problems is a mist collecting device as described in the scope of claims for utility model registration.

A specific description will be given with reference to FIG.
As shown in FIG. 1, a large number of exhaust passage tubes 2 each having a twisted plate 1 therein are provided between upper and lower tube plates 14 in a shell 5, and both ends thereof are provided with the upper and lower tube plates 14. It penetrates and opens to the inside of the upper casing 3 and the lower casing 4.

After the mist-containing exhaust gas enters the upper casing 3, it enters the exhaust passage pipe 2 which is open in the upper casing, and contacts the twisted plate 1 and the inner wall of the exhaust passage pipe 2 and the inside of the twisted plate and the exhaust passage pipe. In the passage composed of the walls, it becomes a swirling flow and flows down, and the mist is deposited and separated on the surface of the twisting plate and the inner wall of the exhaust passage pipe, then enters the lower casing, hits the horizontal airflow generator (deflection plate) 15, and The direction is changed to face the side wall of the casing that faces the exhaust gas outlet.
Therefore, the exhaust gas flowing out from the exhaust passage pipe 2 first hits the deflecting plate 15, and a part of the mist that could not be separated is separated on the surface of the deflecting plate 15 and then hits the casing side wall portion. After a part of the mist is further separated at the side wall, it hits the bottom of the lower casing 4 and is discharged from the outlet gas nozzle 18 after separating a part of the mist.

If a mesh (wire net) 16 is provided on the surface of the side wall of the casing on which the exhaust gas whose flow direction is changed by the deflecting plate 15 hits, the effect of collecting mist in this portion is further enhanced.

The effect is sufficient if the deflecting plate 15 is present at a part of the outlet of the exhaust passage pipe 2. Further, if the distance between the deflecting plate 15 and the lower tube plate 14 is made gradually smaller along the exhaust gas flow direction, the flow velocity of the exhaust gas flowing out from the end of the deflecting plate becomes higher and the deflecting plate becomes The exhaust flow flowing out from the nonexistent portion can also flow toward the side wall where the mesh 16 is present.

FIG. 2 is a perspective view of the deflecting plate 15, in which a drain pipe 17 is opened.

FIG. 3 is a sectional view of the deflecting plate, and FIG. 4 is a sectional view of the end portion of the deflecting plate. As shown in FIG. 2, it is preferable to provide a rising portion 19 at the end portion. A part of the mist collected on the surface of the deflecting plate and the mist dropped from the exhaust passage pipe 2 onto the deflecting plate is pushed by the horizontal airflow and reaches the end of the deflecting plate 15. If there is a rising part here, the flow of mist stops there, but if there is no rising part, it will go to the back surface of the deflector from there, and will travel along the back surface and fall near the outlet gas nozzle. Eventually, a part of the collected mist is accompanied by exhaust gas and flows out from the outlet gas nozzle.

The rising portion 19 is a vertical portion as shown in FIG.
It may be a square shape composed of 19 and a horizontal portion 21, or may be an arc shape as shown in FIG. Further, the rising portion also has the effect of reinforcing the end portion of the deflection plate 15.

Of the mist thus collected and separated, first, the mist separated by hitting the deflection plate 15 passes through the drain pipe 17 and accumulates at the bottom of the lower casing 4. The mist separated by the mesh 16 on the side wall of the lower casing flows down the wall surface of the lower casing and also accumulates at the bottom and flows out from the drain port 12. After that, as shown in FIG. Stored in.

In the present invention, the twisted plate is preferably made of metal such as stainless steel or aluminum alloy, and has an outer diameter substantially close to the inner diameter of the exhaust passage pipe. Further, the torsion plate is of a hanging type and can be removed by removing the upper casing lid. .

[0017]

As described above, the device of the present invention can prevent the recovery mist from secondary scattering from the gas outlet nozzle. Therefore, it is not necessary to suppress the flow velocity of the exhaust gas from the outlet nozzle, and the diameter of the outlet nozzle can be reduced. As a result, the entire device can be downsized, and the device can be constructed at low cost.

[Brief description of drawings]

FIG. 1 is a schematic view of the internal structure of the mist collecting device of the present invention,

FIG. 2 is a perspective view of a horizontal airflow generator provided in the mist collecting device of the present invention;

FIG. 3 is a cross-sectional view of a deflection plate,

FIG. 4 is a sectional view of an end portion of another embodiment of the deflecting plate,

FIG. 5 is a perspective view of a vertical cross section of an exhaust passage pipe provided in the mist collecting device of the present invention;

FIG. 6 is an explanatory diagram showing an example of a mist collecting system including a conventional mist collecting device.

[Explanation of symbols]

 1 Twisted plate 2 Exhaust passage pipe 3 Upper casing 4 Lower casing 5 Shell 6 Louver 7 Cooling tower 8 Filter 9 Oil / water separator 10 Exhaust pipe 11 Recovery mist 12 Drain port 13 U-tube 14 Tube plate 15 Horizontal air flow generator (deflecting plate) ) 16 mesh (wire mesh) 17 drain pipe 18 outlet gas nozzle 19 folding back 20 vertical part 21 horizontal part

Claims (2)

[Scope of utility model registration request] 1. A large number of exhaust passage pipes each having a twisted plate therein are provided between upper and lower pipe sheets in a shell, and exhaust gas containing mist is passed downward from above the exhaust passage pipes to generate mist. In a mist recovery device for separating and recovering from gas, exhaust gas from an exhaust passage pipe is guided above an exhaust gas outlet provided in a lower casing side wall below a shell toward a casing side wall surface facing the outlet. the deflection plate is provided so as to face the lower side of the tube sheet, and this
The distance between the deflector plate and the lower tube plate is in the exhaust gas flow direction.
A mist collecting device characterized in that the deflecting plate is inclined so as to gradually decrease along the direction . 2. The mist collecting device according to claim 1, wherein a mesh is provided on a side wall of the casing facing the exhaust gas outlet.