JPS62213819A - Mist removal device - Google Patents

Abstract

PURPOSE:To furnish exhaust gas with centrifugal action and remove mist by providing a cylindrical main body with a built-in drum having fixed guide vanes and a collecting tube on outer circumference of said main body. CONSTITUTION:A main body 1 is a cylinder having a discharging cylindrical section 2 of small diameter in the upper part. At the central lower section of the main body 1, a drum 3 with a plurality of arc-shaped guide vanes 4 are installed outside at an equal interval. On the outer circumference wall of main body 1, windows 5 are provided at an almost equal intervals to the circumferencial direction, and a collecting tube 6 and a drain tube 7 are interconnected with the window 5. When exhaust gas A containing water is charged from the lower section of main body 1, the gas passes through a space between the inner wall of main body 1 and the drum 3, being compressed and moved in circular motion to the circumference wall. By said process, water drops aggregated and enlarged by centrifugal motion pass window 5, and comes into a collecting tube 6, being collected into a drain tube 7 to be exhausted outside the system.

Description

Detailed Description of the Invention [Industrial Application Field] This invention is a mist removal method that separates and collects acidic mist droplets (mist) generated when cleaning combustion exhaust gas by a desulfurization device, etc. using a centrifugal action. Regarding equipment.

[Conventional technology]

Conventionally, as a method for removing acidic mist droplets generated by the above-mentioned desulfurization equipment, etc., when the flow rate of exhaust gas is large, a grid-shaped filter is installed in the exhaust pipe in a direction perpendicular to the flow. Mist removal was performed by bringing mist droplets into contact and colliding with each other. Moreover, when the flow rate is small, it is also possible to remove it using a gas cyclone device.

[Problems that the invention attempts to highlight]

However, the fine mist droplets contained in the exhaust gas,
# of filters! The size of the mist is much smaller than that of the air, and the number of mist droplets that can be removed by this filter is limited. Further, the gas cyclone device has a drawback in that it is not suitable for removing mist from a large flow rate of exhaust gas because the gas flowing into the main body of the device is blown in in a tangential direction to the main body, so the flow rate is restricted.

This invention was made in view of the above problems, and
The object of the present invention is to provide a mist removing device having a simple structure, which includes a built-in drum having fixed guide vanes, and which applies a centrifugal action to exhaust gas to remove mist.

[Means for solving problems]

As a means for solving the above problems, the present invention has a cylindrical main body equipped with a drum having a small-diameter discharge cylindrical part at the upper part and a central part C guide vane on the lower gas inflow side, A configuration was adopted in which a collection pipe was placed around the outer periphery of the main body, communicating with the inside of the main body through a window hole provided in the main body.

[Effect]

Exhaust gas from the flue gas desulfurization device, which flows in from the gas inlet at the bottom of the main body, is guided by guide vanes through the gap between the inner wall of the main body and the drum, becomes a vortex, and rises while moving in a circular motion. During this circular motion, all moisture such as mist droplets contained in the exhaust gas, including those in the center of the main body, move to the main body peripheral wall due to centrifugal action.

The mist droplets thus moved are concentrated by the centrifugal force, coagulate and become coarse, undergo a swirling motion, enter the collection tube through the window hole, and are then removed from the system.

On the other hand, the exhaust gas from which moisture such as mist droplets has been removed is discharged from the upper discharge cylinder as clean exhaust gas from which harmful components have been removed.

〔Example〕

The details of the embodiments of this invention will be described below with reference to the accompanying drawings.
I will explain this.

FIG. 1 is a main sectional view of this embodiment. Reference numeral 1 denotes the main body of the apparatus, and the main body 1 has a cylindrical shape with a small-diameter discharge cylindrical portion 2 at the upper part. Reference numeral 3 denotes a drum provided at the center of the lower part of the main body 1, and a plurality of arc-shaped guide vanes 4 are arranged at equal intervals on the outer peripheral wall of the drum 3. Reference numeral 5 indicates window holes provided at equal intervals in the circumferential direction of the outer circumferential wall of the main body 1, reference numeral 6 indicates a collection pipe provided standing upright on the outer circumferential wall of the main body 1 in communication with the window holes 5; is a drain pipe in which the lower part of the collecting pipe 6 is assembled.

21￥J and Figure 3 are lines II-IF of Figure 1.
FIG.

This invention as described above is based on a flue gas desulfurization bag (not shown).
When the desulfurized exhaust gas A containing moisture such as acidic mist droplets thus generated is allowed to flow in from the bottom of the main body 1, this gas passes through the gap between the inner wall of the main body 1 and the drum 3, and is guided while being compressed. The blades 4I are guided to form a vortex and move in a circular motion.

In this way, the exhaust gas that has flowed in as an axial flow becomes a vortex flow and is discharged to the discharge cylindrical part 2 while making a circular motion. Moisture is given a centrifugal action and moves from the central part of the main body 1 to the peripheral wall part, and as a result, it is concentrated, coagulates, becomes coarse, and moves around the inner surface of the main body 1, passing through the window hole 5. The water passes through the collection pipe 6I, is collected in the drain pipe 7, and is discharged outside the system.

On the other hand, the exhaust gas B from which moisture such as mist droplets has been removed is discharged from the discharge cylindrical portion 2 to the outside of the apparatus.

Note that the discharge cylindrical portion 2 provided within the main body 1 is designed to provide some resistance to the flow of exhaust gas flowing into the main body 1.
Therefore, the drum 30 is provided in order to assist the circular motion urged by the guide vanes 4.

〔effect〕

This invention as described above is equipped with a cylindrical main body and a drum provided with a fixed guide vane at the center of the lower gas inflow side of the main body, and when exhaust gas containing moisture such as mist drops enters, This exhaust gas moves away from the center by a distance corresponding to the diameter of the citrus and moves toward the peripheral wall. For this reason,
The flying distance of the object to be separated is shortened, and the separation time is shortened.

Therefore.

A large volume of exhaust gas can be processed in a short time.

In addition, since the guide vanes are arranged in a circular arc at regular intervals, the cross section of the opening is reduced and the exhaust gas is compressed while being given centrifugal force. As a result, the mist droplets in the exhaust gas become more concentrated, the collision becomes more intense, and a remarkable agglomeration effect appears, which further promotes the removal of fine mist droplets and greatly improves the collection and separation efficiency. It has excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is a main cross-sectional view of the embodiment of the invention, and FIGS. 2 and 3 are cross-sectional views taken along lines II and If-If in FIG.

Claims (2)

[Claims] (1) A cylindrical main body equipped with a drum with a small diameter discharge cylindrical part on the upper part and a guide vane in the center part on the lower gas inflow side, and a drum provided on the outer periphery of this main body. A mist removal device characterized by having a collection tube communicating with the inside of the main body through a window hole. (2) The mist removing device according to claim 1, wherein the guide vane is fixed to a drum.