JPH0663453A - Cyclone type separation device with blocking mechanism - Google Patents

Abstract

PURPOSE:To obtain a means effectively preventing the adhesion of a material having stickiness such as an amorphous material to the inner wall surface of a cyclone by a relatively simple device. CONSTITUTION:In a cyclone separator equipped with an upper separation cylinder 1 having a material supply pipe 2 connected thereto, the exhaust inner cylinder 3 provided in the upper separation cylinder 1, the lower conical part 6 connected to the lower end part of the upper separation cylinder 1 and a vibrator vibrating the upper separation cylinder 1 and the lower conical part 6, a downwardly inclined spiral guide 4 is provided between the upper separation cylinder 1 and the inner cylinder 3 and the lower conical part 6 is formed from a material having flexibility and abrasion resistance.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is used for removing dust, separating solid particles in a gas, separating a gas from a powder, and the like.
The present invention relates to a cyclone type separation device having a blockage prevention mechanism.

[0002]

2. Description of the Related Art As such a cyclone separator,
A known one is provided with an upper separation cylinder connected to a material supply pipe, an exhaust inner cylinder provided in the upper separation cylinder, and a lower conical portion connected to the lower end of the upper separation cylinder. There is.

This cyclone separating device separates materials by utilizing the centrifugal force of the powder flow, and has been widely used for separating dry powder and air, and separating solution and solids from the past. In addition to such materials in recent years, it has been used to separate sticky materials, especially materials such as amorphous refractories.With such sticky materials, an adhesion layer is formed inside the cyclone and -In addition to hindering air separation, the cyclone's self-suspension is blocked and it becomes inoperable early.

As a solution to these problems,
For example, Japanese Patent Application Laid-Open No. 62-214903 proposes to install a cyclone as a separator at the tip of the nozzle and attach a vibrator to prevent the blockage. However, in order to prevent adhesion using a vibrator, unless the vibration conditions such as frequency and vibration force are properly set, the effect of preventing adhesion cannot be achieved, and a new adhesion layer is formed on the cyclone inner wall, -Separation of coarse particles and fine particles occurs in the material after gas separation, resulting in a very heterogeneous grain structure. Further, there is a problem that the internal adhesion layer is finely packed due to the vibration thereof, and becomes a hard hook-like shape so that it is more easily blocked.

As another technique for preventing adhesion, a cyclone has a double structure disclosed in JP-A-61-93850, and a small hole for ejecting gas is provided on the inner wall, and a gas flow ejected from the hole is provided. To prevent the internal deposit layer, and to provide a rod-like object, which is disclosed in Japanese Patent Laid-Open No. 50-42468, in the vicinity of the lower discharge hole of the cyclone, which comes into contact with the inner surface of the cyclone and makes a rotational movement. There has been proposed a method for scraping off the cyclone internal adhesion layer.

However, all of these devices have some effect on a dry material having no stickiness, but the device itself is complicated, and the sticky material such as concrete or kneaded amorphous material is attached. Cannot be effectively prevented.

[0007]

The problem to be solved by the present invention is to solve the above-mentioned problems in the cyclone type separating device, and to fix the cyclone inner wall surface of an adhesive material such as an amorphous material with a relatively simple device. To obtain a means for effectively preventing the adherence of

[0008]

According to the present invention, an upper separation cylinder connected to a material supply pipe, an exhaust inner cylinder provided in the upper separation cylinder, and a lower end portion of the upper separation cylinder are connected. In a cyclone type separation device including a lower conical part provided and a vibrating device for vibrating the upper separating cylinder and the lower conical part, a spiral guide inclined downward between the upper separating cylinder and the inner cylinder. And the lower conical portion is formed of a material having flexibility and wear resistance, thereby solving the above-mentioned problem.

[0009]

In the present invention, the powder flow supplied from the material supply pipe newly enters near the inflow port due to the action of gravity and the spiral guide provided between the inner cylinder and the upper separation cylinder. It is possible to reliably prevent interference with the flowing material flow, and efficiently swivel down to the lower conical portion without lowering the separation efficiency.

Further, since the lower cone portion is made of a flexible and wear-resistant material such as rubber, resin, cloth, etc., complicated vibration can be obtained by the vibrating device, and the adhesiveness on the inner wall surface of the cone portion can be obtained. It is possible to prevent adherence of a material having a stain.

This is different from vibration in the case of metal or the like.
This is because complex waves of amplitude and cycle are transmitted to the lower part of the cyclone due to the natural frequency of the material.Therefore, the deposits formed in the lower cone part are shaken by these irregular vibrations, and therefore, they are attached until they are blocked. It is assumed that the kimono does not grow and falls.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 (a) is a side view of a cyclone type separating apparatus which is an embodiment of the present invention, and FIG. 1 (b) is a plan view of the same.

In FIG. 1, reference numeral 1 denotes a cylindrical upper separation cylinder connected to a material supply pipe 2. Inside the upper separation cylinder 1, an exhaust gas having an upper end protruding to the outside and a lower end extending to a lower cone portion described later. An inner cylinder 3 for use is provided. Also, the upper separation cylinder 1
As shown in the perspective views of FIG. 1A and FIG. 2, a spiral guide 4 inclined downward is provided between the inner cylinder 3 and the inner cylinder 3.

At the lower end of the upper separation cylinder 1, a truncated conical lower conical portion 6 having a diameter decreasing downward and having a discharge port 5 at the lower end is continuously provided. This lower cone 6
It is made of rubber which has flexibility and wear resistance. Further, a vibration device (not shown) for vibrating the upper separation device 1 and the lower conical portion 6 is provided.

In the above structure, when the cyclone separator is operated, the material flow flowing into the cyclone from the material supply pipe 2 swirls on the inner peripheral surface of the upper separation cylinder 1. At this time, since the material flow swirling around the inner cylinder 3 is guided downward by the spiral guide 4, it does not interfere with the newly flowing material flow. Therefore, it is possible to effectively prevent the reduction of the separation efficiency and the growth of the adhesion layer due to such interference. The material flow that has flowed into the lower conical portion 6 increases in rotation speed as the radius of gyration decreases, and the particles are separated into the inner wall surface of the lower conical portion 6 by centrifugal force. It is discharged from the discharge port 5 to the outside. At that time, by driving the vibration device,
The rubber lower conical portion 6 causes complicated vibrations that are not present in conventional metals, which can prevent adhesion of sticky materials such as amorphous refractories.

In order to confirm the anti-adhesion effect of the above example, a separation test was actually conducted using the amorphous refractories shown in Table 1. As a comparative example, a conventional cyclone-type separation device in which a spiral guide is not provided and the lower cone is made of metal is used.

[0018]

[Table 1] The test conditions are as follows.

Added water: 5.5-6.0% Total transport amount: 200 kg Transport air pressure: 3.0 kg / cm ² Transport speed: 35-40 kg / min Vibration frequency: 20 Hz 1015 rpm (Eurus motor rotation speed: 1015 rpm) FIG. 3 shows the adhering condition of the irregular-shaped refractory to the inner wall surface of the cyclone after being conveyed for 30 minutes. (A) is an example and (b) is a comparative example.

As is apparent from the figure, in the comparative example, the adhesion layer (hatched portion) was formed on the almost entire inner surface of the cyclone, whereas in the example, the cyclone accompanying solid-gas separation of the viscous material was used. There was almost no internal deposit and the device did not clog.

[0021]

As described above, the cyclone separating device of the present invention has a simple structure, but can effectively prevent the formation of a deposit layer, and particularly has an adhesive amorphous refractory. It is also an excellent device that can be operated for a long time without the problem of cyclone blockage.

[Brief description of drawings]

FIG. 1 (a) is a side view of a cyclone type separation device according to an embodiment of the present invention, and FIG. 1 (b) is a plan view of the same.

FIG. 2 is a perspective view showing how a spiral guide is attached.

FIG. 3 is an explanatory diagram showing a state of adhesion of an irregular refractory material.

[Explanation of symbols]

 1 Upper Separation Cylinder 2 Material Supply Pipe 3 Inner Cylinder (Exhaust Cylinder) 4 Spiral Guide 5 Discharge Port 6 Lower Cone

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Nagao 1 Tsukiji No. 7 Kisazu City, Chiba Prefecture Kurosaki Kiln Co., Ltd. Kisarazu Plant (72) Inventor Takayoshi Sato Kimitsu City, Chiba Prefecture New Nippon Steel Co., Ltd. In-house Kimitsu Works (72) Inventor Masanori Kobayashi 1 Kimitsu, Kimitsu-shi, Chiba Shin Nippon Steel Co., Ltd. Inside Kimitsu Works

Claims (1)

[Claims] 1. An upper separation cylinder connected to a material supply pipe, an exhaust inner cylinder provided in the upper separation cylinder, and a lower conical portion connected to a lower end of the upper separation cylinder. In a cyclone-type separation device including a vibration device that vibrates the upper separation cylinder and the lower cone portion, a spiral guide that is inclined downward is provided between the upper separation cylinder and the inner cylinder, and the lower cone portion is provided. A cyclone-type separation device having a blockage prevention mechanism, characterized in that it is formed of a material having flexibility and wear resistance.