JPH062727Y2 - Mist collection device - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a device for recovering mist from exhaust containing mist such as water and oil. The present invention relates to a device for separating and collecting mist.

[Prior Art] Fume mist (emulsion of water and oil) from rolling equipment diffuses as white smoke when it is released into the atmosphere, and it also has an odor, which causes air pollution. Is being done.

As a device for removing this mist, a filtering device using a filter is used, but since it becomes clogged in a short period of time, the maintenance cost of the device is large and it is often not used.

Therefore, the applicant of the present application has previously filed Japanese Patent Application No. 1-71230,
We proposed a mist recovery device that uses many exhaust passage tubes with twist plates inside without using a filter.

[Problems to be Solved by the Invention] The present invention is more effective in preventing white smoke, is capable of separating and collecting mist in exhaust gas, cooling saturated vapor, and liquefying, and
The aim is to provide a device with low maintenance costs.

[Means for Solving the Problems] In the structure of the present invention for solving the above problems, a large number of exhaust passage pipes having twist plates inside are provided between upper and lower pipe plates of a casing, and An opening is provided on the side of the casing to allow cooling air flow in the orthogonal direction, a fume feed duct is connected above the casing, and exhaust from a passage pipe is provided on the lower side and one side of the casing. An exhaust duct having a suction mixing mechanism of the cooling air flow by the flow,
The mist collecting device is characterized in that an upright chamber is continuously provided to the exhaust duct.

[Embodiment] The embodiment will be specifically described with reference to the drawings. FIG. 1 is a perspective view of an example of the device of the present invention. A large number of exhaust passage pipes 6 formed of copper or copper alloy pipes are provided between the upper and lower pipe sheets 9 in the casing 10.
As shown in FIG. 2, there is provided a torsion plate 7 made of metal such as stainless steel or aluminum alloy and having an outer diameter close to the inner diameter of the exhaust passage pipe 6. The ends of a large number of exhaust passage pipes 6 penetrate through the upper and lower tube plates 9 and open, and exhaust gas containing mist passes through the inside of the exhaust passage pipes 6. The exhaust passage pipes 6 are arranged side by side, and cooling air flows between them to cool the exhaust passage pipes 6 from the outside. Exhaust duct 11 with chamber 4 upward from the lower side of casing 10 to one side
Is provided. A guide vane 5 extending from the fume exhaust port 8 to the upper side of the exhaust duct is provided in the exhaust duct, and the cooling air flow is sucked by the exhaust flow flowing along the guide vane and mixed with the exhaust flow. , And chamber 4
Is thoroughly mixed with the exhaust stream and is released into the atmosphere as a mixed exhaust stream. The chamber 4 has a bell mouth 4'up and down,
It has a shape with 4 '.

The flow of exhaust gas containing mist and the flow of cooling air will be described with reference to FIG.
Is fed through a duct connected to the upper part of the and enters the casing from the fume exhaust inlet 1. After entering the exhaust passage pipe 6 opening to the upper tube sheet 9 and contacting the inner wall of the tube or the twisted plate 7 to be cooled, the mist is separated on the inner wall of the tube or the twisted plate. , Flows out from the exhaust passage pipe 6 opened to the lower tube sheet 9, and flows out upward along the side of the casing from the fume exhaust outlet 8 on the lower side of the duct. The presence of the guide vanes 5 subsequently increases the flow velocity, at the end of the guide vanes 5 the cooling air is sucked in and mixed with the cooling air flow before it flows out through the chamber 4.

Cooling air is sucked into the casing from the side of the casing 10 where the cooling air is opened by the exhaust flow that flows to the side of the casing, that is, the cooling air inlet 3 and passes through between the rows of the exhaust passage pipes 6 while After cooling the passage pipe 6 from the outside, it flows out from the opposite side, that is, the cooling air outlet side 2, is mixed with the exhaust gas flowing out from the fume exhaust outlet 8 at the end portion of the guide vane 5, and then flows out from the chamber 4. To do.

FIG. 3 is a system diagram including the device of the present invention. The fume mist generated in the rolling equipment (mill) and floating upward is sucked through the hood by the blower B and sent to the mist collecting device of the present invention, where the mist is separated and then the cooling air flow is sucked and mixed. Is mixed with the cooling air stream by the ejector, and is more thoroughly mixed with the cooling air stream in the chamber and discharged into the atmosphere as a mixed exhaust stream. Then, the mist is returned to the oil cellar and reused.

The exhaust gas is mixed with the outflow air that has been heat-exchanged with the exhaust gas and is heated to become steam-unsaturated exhaust gas, so that white smoke due to the exhaust gas flowing out from the chamber 4 is significantly reduced.

In addition, as the shape of the chamber 4, other than FIG.
Although the deformations shown in (b) and (c) are conceivable, the chamber 4 of FIG. 1 with the proper size is most effective. This is because the mixed exhaust flow flows toward the center of the chamber at the inlet of the chamber, so that the exhaust gas is sufficiently mixed, and at the outlet of the chamber, the mixed exhaust flow diffuses in the opposite direction, so that the mixed exhaust flow is scattered.

[Effects of the Invention] The following effects can be obtained by adopting the mist collecting device of the present invention described above.

1) Exhaust odor, white smoke; mist scattering can be prevented.

2) Mist with a size of 10 μm or more can be sufficiently collected.

3) When the particle size distribution of mist is 150 μm or less, recovery efficiency of 95% or more can be realized.

4) The recovered rolling oil can be recovered and reused.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of the mist collecting device of the present invention, FIG. 2 is an enlarged cross-sectional view of the portion marked with a circle of the exhaust passage pipe in the device of FIG. 1, and FIG. 3 is a mist collecting device of the present invention. The exhaust system diagram provided and FIGS. 4 (a), (b), and (c) are modified examples of the chamber. 1 ... Fume exhaust inlet, 2 ... Cooling air outlet side, 3 ... Cooling air inlet side, 4 ... Chamber, 4 '... Bell mouth, 5 ... Guide vane, 6 ... Exhaust passage pipe, 7 ... Torsional plate, 8 ... Fume exhaust Outlet, 9 ... Tube sheet, 10 ... Casing, 11 ... Exhaust duct.

Claims (1)

[Scope of utility model registration request] 1. A plurality of exhaust passage pipes, each having a twist plate inside, are provided between upper and lower pipe plates of the casing, and a side portion of the casing is provided so that a cooling air flow can flow in a direction orthogonal to the passage pipes. An opening is provided in the casing, a fume feeding duct is connected to the upper side of the casing, and an exhaust duct having a suction mixing mechanism for cooling air flow by the exhaust flow from the passage pipe is provided at the lower side and one side of the casing. A mist collecting device characterized in that an upright chamber is continuously provided to the exhaust duct.