JPH0568914A - Vertical solid-liquid separator - Google Patents

Abstract

PURPOSE:To reduce noise and vibration by using a damping steel plate as the steel plate constituting a screen cylinder and the outer wall coming into contact with a separated solid of the cyclone attached to the separated solid taking-out port connected to the inside of the screen cylinder on the downstream side of said port. CONSTITUTION:When a solid-liquid mixture to be separated is supplied into a screen cylinder 2 from the raw material supply port 5 provided to the lower part thereof, said mixture is pressed to the inner surface of the screen cylinder 2 by the centrifugal force of a roller 3 rotating at a high speed and a liquid passes through the screen cylinder 2 to be separated from a solid. The solid remaining in the screen cylinder 2 is scraped off by a scraping blade 4 to be sent upwardly and taken out of a separated solid taking-out port 6. Subsequently, the liquid accompanied by the solid is separated by a cyclone 8. In this vertical solid-liquid separator, a damping steel plate is used as the steel plate constituting at least the screen cylinder 2, the outer wall coming into contact with the separated solid of the cyclone 8 and/or the part of the separated solid taking-out port 6 to reduce noise and vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vertical solid-liquid separator (hereinafter simply referred to as "vertical solid-liquid separator" used for separating a liquid such as a synthetic fiber raw material chip mixed with a liquid, a synthetic resin pellet, etc., from a liquid. Called a separator).

[0002]

2. Description of the Related Art For separating solid materials such as chips and pellets from a mixture of a synthetic fiber raw material chip, a synthetic resin pellet, a suspension polymer, a crushed plastics solid material and a liquid such as water. Various solid-liquid separators are used in. The separator targeted by the present invention is one of them, and is widely used because of its simple mechanism and high efficiency.

First, the separator will be briefly described with reference to the drawings showing an example of the separator.

FIG. 1 is a partially sectional front view showing an outline of an example of a separator, and FIG. 2 is a sectional view taken along the line AA 'in FIG.

A screen cylinder 2 for separating solid and liquid is provided inside the casing 1, and the lower end of the screen cylinder 2 is closely fixed to the bottom surface of the casing 1. A rotor 3 having a scraping blade 4 attached to the outer surface thereof is provided inside the screen cylinder 2, and the rotor 3 is rotated at a high speed by a motor 13 during operation. When the solid-liquid mixture to be separated is supplied from the raw material supply port 5 at the bottom of the screen cylinder 2 to the inside of the screen cylinder 2, the solid-liquid is pressed against the inner surface of the screen cylinder 2 by the centrifugal force of the rotor 3 rotating at high speed, The liquid passes through the screen 2, leaving the solid inside and separating the solid and the liquid. The solids remaining inside are scraped by the scraping blades 4, while being sent upward through the gap between the screen cylinder 2 and the rotor 3, and taken out from the separated solids discharge port 6 connected from the upper inside of the screen cylinder 2. .. The separated solids discharge port 6 has an annular shape in which the inside is connected to the upper end portion of the rotor 3, the lower side is connected to the space portion between the screen cylinder 2 and the rotor 3, and the outside and the upper side are isolated from the outside by a wall. A pipe 7 for taking out the solid is provided. A cyclone 8 is directly or indirectly connected to the pipe 7 of the separated solids extraction port 6 via another pipe or the like to separate the liquid entrained in the solid. On the other hand, the liquid that has passed through the screen 2 is
And the casing 1 are lowered, and the liquid is discharged from a discharge port 12 provided in a lower portion of the casing 1. The cyclone 8 is composed of a cylindrical separating part 9, a conical collecting part 10 connected to the lower part of the separating part 9, an inlet 11 for introducing solids taken out from the separator body into the separating part 9, and the like. ..

[0006]

The separator described above is a highly efficient device originally designed on the assumption of long-term continuous operation. However, this type of separator is mostly composed of a relatively thin steel plate in a cylindrical shape, and since the solid-liquid to be treated contacts the wall surface of this steel plate while being rubbed at high speed, the vibration of the steel plate is large and It is inevitable to make noise inside. However, recently, polymer materials with a high glass transition point,
Increasingly, we are dealing with composites containing fiber reinforcements, and when processing such materials, we are now making more noise and vibration than before. In addition, the vibration may reach the other equipment through the connected pipe, which is not preferable.

The present invention has been made to solve the problems of noise and vibration.

[0008]

First, the inventor of the present invention uses a vibration-proof packing for installation of a separator to prevent noise, inserts a soft pipe into a pipe connecting portion, and installs a part of equipment. Was covered with a soundproof sheet, but the effect was not ridiculous. Therefore, as a result of further research, the present invention was completed.

That is, a cylindrical casing, a screen cylinder fixedly provided in the casing, a cylindrical rotor provided with scraping blades on its outer surface, and a screen rotor provided inside the screen cylinder. In a separator consisting of a separator main body part consisting of an attached part and a cyclone attached downstream of the separated solids outlet connected to the inside of the screen cylinder, at least the outer wall of the separated solids of the cyclone in contact with the screen cylinder, Alternatively, and / or a damping steel plate (also referred to as a sound deadening steel plate) is used as a steel plate forming the separated solids outlet portion.

[0010]

The present invention will be further described. The separator of the present invention is
As a result of the above-mentioned examination of noise prevention measures, it was decided to adopt a damping material as part of the constituent materials. This is because the vibration damping material has a function of attenuating noise and vibration from its source. The damping material used may be either a composite type or an alloy type, but at present the composite type is more economical, and when the damping material is adopted, the parts that have a large noise and vibration prevention effect are mainly steel plates. Since it is configured, a composite type restraint type damping steel plate is used for the steel plate portion. This damping steel plate is made by attaching a polymer material having a high loss coefficient to the diaphragm as a damping material, and further sandwiching a panel on the damping material.

However, the vibration damping steel plate is considerably more expensive than the ordinary stainless steel plate. If it is used for all parts of the separator, it loses its economical efficiency, and it is wasteful to use it even in a less effective place. As a result of various studies, it was found that it is quite effective when used in a specific place, and that even if it is used in other places, a great effect cannot be expected for the cost of processing and other costs.

As a result of studying its effective use, it was surprisingly found that when it is used as a constituent material of a cyclone mounted downstream of the separated solids outlet of the separator body, it has a great effect in preventing noise and vibration. .. Moreover, it has been found that if it is used for the steel plate of the outer wall portion of the cyclone that is in contact with the separated solid matter, that alone has a great effect in preventing noise and vibration.
Since the damping steel plate is usually a sandwich structure, its processing is considerably limited. Fortunately, the outer wall structure of the cyclone is simple, there is no major obstacle in processing the damping steel plate, and the increase in production cost can be kept low. Here, the outer wall portion refers to the outer wall of the cyclone separating portion, the collecting portion, and the inlet. However, when there is a problem in processing, one of these parts can be replaced with a normal steel plate, and the other part can be composed of a damping steel plate.

Next, it is effective to form the steel plate portion of the screen cylinder with a damping steel plate. The screen of the screen cylinder, which is usually made of punched steel plate, is a part where solids that separate are in heavy contact, and when a vibration-damping steel plate is used, the vibration-damping action works greatly, and processing is relatively easy. ..

If a damping steel plate is used for the separated solids outlet connected from the inside of the screen cylinder, noise and vibration are reduced. This part is also effective because many parts are made of steel plates and are easy to process.

Each of the above-mentioned points has a great effect even if a damping steel plate is used independently, but it is also possible to replace two or three points with the damping steel plate at the same time. Of course, vibration-damping steel plates may be used at other locations at the same time. For example, if a damping steel plate is used for the steel plate portion of the duct that connects the solid outlet and the cyclone, noise and vibration can be further reduced to some extent. Further, it is also possible to use a vibration isolating rubber in combination with other means, for example, for installation.

[0016]

EXAMPLES Next, examples will be described.

Using a pellet continuous dehydrator (manufactured by Tanaka Iron Works Co., Ltd .: model MCH-800), a cyclone separator, a collector and an inlet, and a screen mounted downstream of the separated solids outlet of the separator main body. The steel plate portion of the cylinder and the separated solids outlet portion were remodeled and replaced with a damping steel plate (manufactured by Nippon Yakin Co., Ltd .: trade name NAS Zerophone). The cyclone of this separator has a height of about 700 mm and an outer diameter of about 200 mm.
Screen height approx. 900 mm, outside diameter approx. 300 mm, separated solids outlet part approx. 500 mm outside diameter, approx. 400 mm inside diameter
mm, height of about 100 mm has a hollow ring structure,
The main motor was 3.7 kW.

This separator was installed in an assembly plant and actually operated before and after the modification. A mixture of various resins and water was supplied at a rate of 500 kg / hour at 25 ° C. and separated, and the noise at a point 1 m on the machine side was measured by a commercially available sound level meter. The results are shown in Table 1.

[0019]

[Table 1]

[0020]

EFFECT OF THE INVENTION By using the separator of the present invention in which the damping steel plate is used for the outer wall of the cyclone, the screen cylinder, and / or the steel plate portion of the separated solids outlet, a polymer material having a high glass transition point or a fiber is used. Even when handling a composite material containing a reinforcing agent, noise and vibration are less likely to occur, which is effective in improving the working environment. Because the vibration damping steel plate is used only at the important points where noise and vibration are effectively prevented and it is easy to process, the manufacturing cost is small and the noise and vibration are small, and it is an economical vertical solid-liquid separator. is there.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view showing an outline of an example of a separator.

FIG. 2 is a sectional view taken along the line AA ′ of FIG.

[Explanation of Codes] 1: Casing 2: Screen cylinder 3: Rotor 4: Scraping blade 5: Raw material supply port 6: Separated solids extraction port 7: Piping 8: Cyclone 9: Separation unit 10 / Collection unit
11: Inlet port 12: Drainage port 13: Motor

Claims (1)

[Claims] 1. A cylindrical casing, a screen cylinder fixedly provided in the casing, a cylindrical rotor provided in the screen cylinder and having scraping blades mounted on the outer surface thereof, and a rotor for these cylinders. In a vertical solid-liquid separator consisting of a separator main body part including an attached part, and a cyclone attached downstream of the separated solids outlet connected to the inside of the screen cylinder, at least an outer wall of the cyclone separated solids in contact with the cyclone, A vertical solid-liquid separator characterized in that a damping steel plate is used for the steel plate constituting the screen cylinder and / or the separated solids outlet portion.