JPH0663454A - Cyclone separator - Google Patents

Abstract

PURPOSE:To provide a cyclone separator enhanced in the separation efficiency of dust in exhaust gas and more reduced in pressure loss. CONSTITUTION:In a cyclone separator for separating dusts A, B, C in exhaust gas G by centrifugal force, a cyclone main body 3 being a rotary body having an introducing pipe 6 introducing exhaust gas while revolving the exhaust gas G connected to the upper end part thereof and having a dust discharge port 4 at the lower end part thereof is formed and concentric circular multiple exhaust pipes 7 are provided to the central part of the upper end of the cyclone main body 3 to separate the dusts A, B, C in the exhaust gas G corresponding to a particle size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cyclone separator which is capable of classifying and separating particles having different particle diameters, and having a small pressure loss and high efficiency.

[0002]

2. Description of the Related Art Generally, a multi-stage cyclone separating device such as a double cyclone is configured by connecting conventional cyclones in two or more stages, separating large-sized particles in the first stage, and then sequentially separating small-sized particles in the subsequent cyclones. The particles are classified and separated.

This will be described with reference to the double cyclone example of FIG.

In FIG. 2, a is a cyclone in the first stage,
b is a second-stage cyclone, and each cyclone a, b has an introduction pipe c for introducing the exhaust gas G as a swirl flow, and a swirl vane d is provided at the introduction port of the introduction pipe c Has a fluid discharge pipe e. The fluid discharge pipe e of the first-stage cyclone a and the introduction pipe c of the second-stage cyclone b are connected by a connecting pipe f to form a double cyclone.

In this double cyclone, the dust having a large particle size is separated by the cyclone a at the first stage, and the dust having a small particle size is introduced from the discharge pipe e through the connecting pipe f into the cyclone b at the second stage. Will be separated.

[0006]

However, since this double cyclone connects the cyclones in multiple stages,
There is a problem that the pressure loss increases and the separation efficiency of dust in the exhaust gas G is poor.

Therefore, the present invention has been devised to solve the above problems, and an object thereof is to provide a cyclone separator having a high efficiency of separating dust in exhaust gas and a smaller pressure loss. It is in.

[0008]

Means for Solving the Problems The present invention to achieve the above object is to provide a cyclone type separating apparatus for separating dust in exhaust gas by centrifugal force, while swirling the exhaust gas at an upper end portion, A cyclone body of a rotating body having a dust outlet at the lower end is formed while connecting an introduction pipe for introduction, and a concentric multiple exhaust pipe is provided facing the center of the upper end of the cyclone body. The dust in the exhaust gas is separated according to the particle size.

[0009]

As described above, according to the present invention, the concentric multiple exhaust pipes are provided at the center of the upper end of the cyclone body.
The dust contained in the exhaust gas can be separated according to the particle size. That is, the dust with a large particle size is separated from the exhaust gas by the centrifugal force and discharged from the dust discharge port of the cyclone body, and the dust with a small particle size flows to the multiple exhaust pipe side together with the exhaust gas. At this time,
Dust with a large particle size receives a large centrifugal force, so it is discharged from the exhaust pipe side on the outer peripheral side, and as the particle size decreases, it is discharged from the exhaust pipe on the center side. The separation is done.

[0010]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which 1 is a cyclone separating apparatus according to the present invention, and 2 and 3 are small cyclones connected to the downstream side of the cyclone separating apparatus 1. is there.

As shown in the figure, the cyclone separating device 1 is formed by successively reducing its diameter downward, and a processing fluid introducing pipe 6 is provided on an upper portion of a cyclone main body 3 in the form of a rotor having a dust discharge port 4 formed below. Are connected, and a swirl vane 11 is provided on the introduction pipe 6. Further, this processing fluid introducing pipe 6
A concentric multiple exhaust pipe 7 is provided facing the cyclone body 3 at the center of the. The multiple exhaust pipe 7 is composed of, for example, a triple pipe body of an outer fluid exhaust pipe 8, an intermediate fluid exhaust pipe 9, and an inner fluid exhaust pipe 10. The suction ports 12, 13, and 14 are formed so as to project downward with a step.

Also, each exhaust pipe 8 of the multiple exhaust pipe 7,
9 and 10 are connected to ordinary small cyclones 2a, 2b and 2c via connection pipes 15, respectively.

Next, the operation of the embodiment will be described.

Exhaust gas G flowing from the introduction pipe 6 into the cyclone body 3 is swirled by swirling vanes 11. At this time, since a large centrifugal force acts on the dust (100 to 10 μm) A having a large particle size contained in the exhaust gas G, it is separated from the exhaust gas G and falls,
Emitted from the dust outlet 4 (dust collection rate 85-95%),
The remaining fine dust is flowed to the multiple exhaust pipe 7 side together with the gas. Further, at this time, the dust B (20 to 3 μm) having a medium particle size that has not been centrifuged is affected by the centrifugal force, and together with the gas, the outer exhaust pipe 8 and the intermediate exhaust pipe 8 located on the outer peripheral side of the multiple exhaust pipe 7. The dust C, which passes through the exhaust pipe 9 and flows toward the small cyclones 2a and 2b, respectively, has the smallest particle size (3 to 0.1 μm) and is hardly affected by centrifugal force. It passes through the pipe 10 and flows toward the small cyclone 2c. Then, the dusts B and C that have flowed toward the small cyclones 2a, 2b, and 2c are separated from the exhaust gas G here.

[0016]

In summary, according to the present invention, by providing the cyclone body with the concentric multiple exhaust pipes, powders having different particle diameters are classified and flow through the multiple exhaust pipes. The small cyclone for separating the powder that has flowed into the tube can be made smaller by reducing the flow rate, resulting in less pressure loss as a whole and greatly improving the dust separation efficiency.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a schematic view showing a conventional double cyclone.

[Explanation of symbols]

 1 Cyclone Separator 3 Cyclone Main Body 4 Dust Discharge Port 6 Inlet Pipe 7 Multiple Exhaust Pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigehiro Miyamae 3-2-16 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Toyosu General Office (72) Inventor Hideto Hashimoto 3-chome, Toyosu, Koto-ku, Tokyo No. 16 Ishikawajima Harima Heavy Industries Ltd. Toyosu General Office

Claims (1)

[Claims] 1. A cyclone separation device for separating dust in exhaust gas by centrifugal force, wherein an upper pipe is connected to an inlet pipe for introducing the exhaust gas while swirling the exhaust gas, and a dust is attached to a lower end. A cyclone main body of a rotating body having a discharge port is formed, and a concentric multiple exhaust pipe is provided facing the center of the upper end of the cyclone main body to separate dust in the exhaust gas according to the particle size. A cyclone separation device characterized in that