JPS6025175B2 - Fine mist separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fine mist separation device for separating fine mist from a gas stream such as gas or steam.

Conventionally, as a separation device for separating fine mist from a gas flow such as gas or steam containing soluble dust or mist, an impingement plate mist separator having a large number of corrugated impingement plates held at appropriate intervals has been widely known. It is being

This collision plate mist separator has a relatively high gas flow rate and low pressure loss, and can separate and remove fine mist. However, the mist particle size that can be efficiently separated and removed is at most about 10 mm. However, separation of fine mist having a particle size smaller than this has the disadvantage that the efficiency is extremely reduced. First, install two or more wire mesh separators,
The flow rate at which the gases pass through the first stage wire mesh separator is set higher than the critical flow velocity at which the wire mesh exhibits the highest separation efficiency for fine mist, and the mist with large particle size is separated by the wire mesh in the second stage and below. There is also a known mist separator that removes mist using a device, but with this device, the flow rate of gas passing through the wire mesh separators in the second and lower stages must be considerably lower than the gas flow rate in the first stage wire mesh separators. Therefore, it is necessary to increase the gas passage area of the wire mesh separator in the second stage and below, making the entire separation device large and multiple, increasing the installation area, making it expensive, and furthermore, the pressure loss is extremely large. There were many drawbacks.

The fine mist separator of the present invention is a fine mist separator that solves these conventional drawbacks, and includes a plurality of fibrous filters installed in a support frame in parallel at the lower part of a rigid separation column. A mist separator consisting of a folded plate type collision plate is arranged above the exhaust gas intermediate chamber, and the top and bottom of each fibrous filter are alternately connected with shielding plates. An exhaust gas introduction chamber having an exhaust gas inlet is formed in the lower part of the fibrous filter, a funnel-shaped shielding plate connecting the bottoms is provided with a droplet outlet that enters the liquid storage tank, and the fiber A mist separator made of a folded plate-type collision plate is installed in the upper part of the exhaust gas intermediate chamber which is connected to the exhaust gas introduction chamber through the fibrous filter, and a mist nozzle is installed in the exhaust gas introduction chamber on the gas inflow side of the fibrous filter. This is a fine mist separation device installed with an opening on the side of the filter.

A more detailed explanation of the structure of the present invention will be given with reference to FIG. 1 showing a specific example. An exhaust gas introduction chamber opening 3 is provided in an exhaust gas introduction chamber 2 at the bottom of the separation column 1.

A plurality of fibrous filters 6 made of natural fibers, synthetic fibers, glass fibers, etc. are installed above the exhaust gas introduction chamber 2 in the separation tower 1 and held in a support frame 5 by support arms 4 such as angles.

Note that the surface of the fibrous filter 6 is preferably surrounded by a wire mesh 7 or the like to prevent it from scattering. The outermost support frame 5 of the support frames 5 holding the plurality of fibrous filters 6 and the separation tower 1 are sealed with a shielding plate 8 to prevent exhaust gas from blowing through, and the spaces between each support frame 5 are
As shown in the figure, the top part and the bottom part are alternately sealed with shielding plates 8 for preventing exhaust gas blowing and for discharging Tachibana liquid droplets, so that the exhaust gas from the exhaust gas introduction chamber 2 passes only through the fibrous filter 6. Keep it tightly sealed. A mist separator 11 consisting of a large number of folded plate type collision plates 10 held at appropriate intervals is disposed above the exhaust gas intermediate chamber 9 which is connected to the exhaust gas introduction chamber 2 through a plurality of twill filters 6.
Furthermore, it is a fine mist separation device made of a horizontal structure in which a mist nozzle 12 is installed in the exhaust gas introduction chamber 2 on the exhaust gas inflow side of each fibrous filter 6 so as to face the fiber filter 6 side.

The fibrous filter 6 has a content of 90% to 92%, preferably 92%.
It is preferable to use a material having a porosity of about 95% and a thickness of about 5 to 35 willows. Further, it is more preferable that the folded plate type collision plate 10' forming the mist separator 11 is provided with collision pieces and collection particles of various shapes.

Furthermore, it is also preferable that the folded plate type collision plate 101 be provided with a groove for collecting and discharging droplets from the bottle.

Since the fine mist separator device of the present invention has the above-described configuration, the exhaust gas flow such as gas or steam containing soluble dust or mist is passed through the exhaust gas inlet 3 at the bottom of the separation column 1. Once introduced into the introduction chamber 2, the exhaust gas stream rises into the separation column 1 and, by atomization from the atomizing nozzle 12, collides with the fibrous filter 6 forming a liquid continuous phase. The exhaust gas passes through the interior and enters the exhaust gas intermediate chamber 9.

At this time, most of the fine dust and mist contained in the exhaust gas are combined with the liquid continuous phase in the fibrous filter 6, and become large particles, some of which are disposed of on the shielding plate 8 for discharging the collected liquid bottle below. The liquid drops to a liquid reservoir 14 at the bottom of the separation tower 1 through a liquid droplet storage tank 13 having a liquid seal structure.

On the other hand, the gas flow containing large droplets that has flowed into the exhaust gas intermediate chamber 9 rises to a mist separator 11 consisting of a folded plate type collision plate 10.
The remaining large droplets collide with the folded plate-type collision plate 10 to be collected and removed, become even larger droplets, fall through the exhaust gas intermediate chamber 9, and land on the shielding plate 8 for discharging the collected droplets. The gas stream that falls and is stored in the liquid reservoir 14 as described above, and that contains almost no mist, is discharged from the gas discharge chamber 15 at the top of the separation column 1.

As described above, the fine mist separator of the present invention is provided with a plurality of fibrous filters that form a continuous liquid phase on the gas introduction side of one separation column, and a folded plate type collision plate on the discharge side. This is a fine mist separation device consisting of a two-stage collection zone equipped with a mist separator of It is.

Moreover, the present invention has the following effects by having the above-mentioned configuration.

(b) The fibrous filter has a large mist accumulation area.

{Exposure) The double filter system consisting of a fibrous filter and a mist separator made of a folded plate type collision plate provides good collection efficiency.

The droplets collected by the mist separator made of a folded plate-type collision plate are collected by the shielding plate and discharged from the funnel-shaped droplet outlet into the droplet storage tank, so that the filtration by the fibrous filter is prevented. Not a hindrance.

Therefore, it is a device that can separate and remove fine mist from various exhaust gas flows, and is a much more useful device than the Tsurumi point for preventing air pollution.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a vague cross-sectional view of the fine mist separating device of the present invention. DESCRIPTION OF SYMBOLS 1... Separation tower, 2... Exhaust gas introduction chamber, 3... Exhaust gas inlet, 4... Support frame, 6... Fibrous filter, 7
...wire mesh, 8...shielding plate, 9...exhaust gas intermediate chamber,
10... Folded plate type collision plate, 11... Mist separator, 1
2... Floor fog nozzle, 13... Droplet storage tank, 14...
・Liquid pool.

Claims (1)

[Claims] 1. A plurality of fibrous filters installed in a support frame are installed in parallel in the lower part of a vertical separation tower, and a mist separation device consisting of a folded plate type collision plate is installed in the upper part with an intermediate chamber for exhaust gas separated. The top of each fibrous filter and the bottom of each fibrous filter are connected alternately with shielding plates to form an exhaust gas introduction chamber having an exhaust gas introduction chamber opening in the lower part of the fibrous filter. A droplet outlet opening into the droplet storage tank is provided in the funnel-shaped shielding plate connected to the bottom part, and a spray nozzle is provided in the exhaust gas introduction chamber on the gas inflow side of the fibrous filter, and a spray nozzle is opened toward the fibrous filter side. A fine mist separation device characterized by being installed at