JPH0645652U - Cake discharge device for horizontal centrifugal filter - Google Patents

Abstract

(57) [Summary] [Purpose] The device for integrating cake scraping means and discharging means is used to prevent the undiluted solution from mixing into the product cake and to prevent the scraped cake fine powder from scattering into the basket. In addition, it is another object of the present invention to provide a cake discharge device for a horizontal centrifugal filter that can always discharge the cake smoothly. A movable discharge pipe mounted horizontally and rotatably on a casing door, a scraping arm integrally formed in an upper opening inside the machine of the movable discharge pipe, and an outer side of the movable discharge pipe. A fixed discharge pipe coaxially provided adjacent to the end, an electric screw conveyor coaxially mounted in the movable discharge pipe and the fixed discharge pipe, and a drive cylinder for rotating the movable discharge pipe. A cake discharging device for a horizontal centrifugal filter, comprising:

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cake discharging device for a horizontal centrifugal filter.

[0002]

[Prior art]

 The horizontal centrifugal filter has high separation performance under high centrifugal force, can obtain a product cake with uniform liquid content and cleaning effect, and has an open front door, which facilitates the work of replacing the filter media and in-machine inspection. Because of its advantages, it is used in many fields including the chemical industry. The overall structure of a conventional horizontal centrifugal filter and a cake discharging device will be described with reference to FIG. A stock solution slurry S to be treated is supplied into a rotating basket 2 via a liquid supply pipe 1. By the action of the centrifugal force, the liquid component passes through the filter medium 3 as the filtrate F, passes through the perforations in the circumferential portion of the basket 2, enters the casing 4, and is discharged to the outside of the machine.

On the other hand, the solid content remains on the filter medium 3 and forms a cake layer C1 as the filtration progresses. When the thickness and the liquid content of the cake layer C1 reach a predetermined value, the scraping arm 5 is rotated radially outward by a hydraulic cylinder (not shown) to move the scraping knife 6 attached to the tip. The cake portion is pressed against the cake layer C1 and the cake portion is scraped off onto the discharge short 7 directly below the scraping arm 5. The cake C2 that has been scraped off becomes powdery particles and is transmitted to the outside of the machine through the discharge shoot 7.

[0004]

[Problems to be solved by the device]

 As described above, in the conventional horizontal centrifugal filter, the cake discharging device includes a scraping device including a scraping arm 5 mounted on the casing door 8 and a cylinder for driving the scraping arm, and a scraping device. It consists of a discharge chute 7 that has an upper opening just below the take-up arm and is installed diagonally downward on the casing door, and two separate devices. For this reason, when the undiluted solution is supplied to the basket 2, splashes of the undiluted solution, which are generated because the basket 2 is rotating at a high speed, enter through the upper opening of the discharge chute 7 and the inner surface of the chute 7 or the bent corner. There was a problem that the deliquescent cake was also wet. Further, when the specific gravity of the cake is light, there is a problem that a part of the fine powder of the cake scraped off is scattered into the basket 2 from between the bottom opening of the scraping arm 5 and the upper part of the discharge chute 7. However, if the cake is adherent, it adheres to the discharge chute 7 and is not discharged smoothly.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide an apparatus in which cake scraping means and discharging means are integrated into a product cake. It is an object of the present invention to provide a cake discharge device for a horizontal centrifugal filter that prevents the undiluted solution from mixing and prevents the scraped cake fine powder from scattering into the basket, and that allows the cake to be discharged smoothly at all times.

[0006]

[Means for Solving the Problems]

 The gist of the present invention for solving the above-mentioned problems is to supply a stock solution slurry to a rotating basket (2) and to form it on a filter medium (3) surface stretched around the inner peripheral surface of the basket. In a horizontal centrifugal filter for scraping and discharging a cake layer, a movable discharge pipe (11) mounted horizontally and rotatably on a door (8) of a casing, and an integral body upper opening of the movable discharge pipe. -Shaped scraping arm (12), fixed discharge pipe (13) coaxially provided adjacent to the outer side end of the movable discharge pipe, the movable discharge pipe and the fixed discharge pipe A cake discharge device for a horizontal centrifugal filter, comprising: an electric screw conveyor (14) coaxially mounted on the shaft and a drive cylinder (15) for rotating the movable discharge pipe.

[0007]

[Action]

 When the cake layer C1 formed on the inner surface of the filter medium (3) in the filtration step is drained to a predetermined liquid content, the movable cylinder (15) rotates the movable discharge pipe (11) in the arrow direction of FIG. . At this time, the scraping arm (12) integrally formed with the movable discharge pipe also rotates simultaneously, so that the knife (16) attached to the upper end side of the scraping arm (12) is pressed against the cake layer C1. , Scrape the cake. The cake C2 that has been scraped into powder particles falls into the movable discharge pipe (11), is then horizontally moved to the fixed discharge pipe (13) by the screw conveyor (14), and is discharged from the discharge port (17) to the outside of the machine. .

[0008]

【Example】

 Next, embodiments will be described with reference to the drawings. 1 is a vertical sectional view of a centrifugal filter to which the present invention is applied, and FIG. 2 is a horizontal sectional view of the upper half of FIG. In the figure, the same members as those in FIG. 3 are denoted by the same reference numerals. That is, 1 is a feed pipe for the undiluted solution S, 2 is a rotating basket having many perforations in the circumference, 3 is a filter material stretched around the circumference of the basket, 4 is a casing surrounding the basket, and 8 is a casing. The front door can be opened and closed. The movable discharge pipe 11 is horizontally and rotatably attached to the door 8 by a normal bearing member. Reference numeral 12 is a scraping arm having a short opening cross section which is integrally formed in the upper opening portion of the movable discharge pipe 11 on the basket side. Is attached. Numeral 13 is a fixed discharge pipe having the same diameter as that of the movable discharge pipe, which is provided adjacent to the outer side end of the movable discharge pipe and is coaxial with the movable discharge pipe. Connected. Reference numeral 17 denotes a cake discharge port provided below the end of the fixed discharge pipe.

Reference numeral 14 denotes a screw bear which is coaxially mounted in the movable discharge pipe 11 and the fixed discharge pipe 13, and is slowly rotated by an electric motor 19 via a pulley 18 fixed at one end. Reference numeral 15 is a hydraulic cylinder for driving the scraping arm, and its piston is connected to a lever 20 fixed to the movable discharge pipe 11 to operate to rotate the scraping arm as indicated by an arrow in FIG.

The operation of the embodiment having the above configuration is as follows. When the cake layer C1 having a predetermined thickness is formed on the filter medium 3 and the drainage is completed as the filtering operation progresses, the rotation of the basket 2 is decelerated, and the drive cylinder 15 is operated to move the scraping arm 12 to the position shown in FIG. Rotate in the direction of the arrow. A knife 16 attached to the upper end of the scraping arm 12 scrapes the cake while gradually pressing it against the cake layer C1, granulates it, and drops it into the lower movable discharge pipe 11. The cake C2 that has fallen into the movable discharge pipe 11 is horizontally moved to the fixed discharge pipe 13 by the slowly rotating screw conveyor 14, and eventually discharged from the machine through the cake discharge port 17 provided on the lower side.

[0011]

[Effect of device]

 According to the present invention having the configuration and operation described above, it is possible to completely prevent the undiluted solution from being mixed into the scraped product cake, and to prevent the scraped cake fine powder from being scattered into the basket. The effect is that the scraped cake can always be discharged smoothly.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a centrifugal filter to which the present invention is applied.

FIG. 2 is a lateral cross-sectional view of the upper half of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional horizontal centrifugal filter.

[Explanation of symbols]

1; liquid supply pipe, 2; basket, 3; filter medium, 4; casing, 5; scraping arm, 6; scraping knife, 7; discharge chute, 8; door, 11; movable discharge pipe, 12; scraping arm 1
3; fixed discharge pipe, 14; screw conveyor, 15; drive cylinder, 16; knife, 17; cake outlet, 1
8; pulley, 19; electric motor, 20; lever.

Claims (1)

[Scope of utility model registration request] 1. Horizontal centrifugal filtration for feeding a stock solution slurry to a rotating basket (2) and scraping and discharging a cake layer formed on a surface of a filter material (3) stretched on the inner peripheral surface of the basket. In the machine, a movable discharge pipe (11) mounted horizontally and rotatably on a door (8) of a casing, and a scraping arm (12) integrally formed in an upper opening of the movable discharge pipe inside the machine. A fixed discharge pipe (13) coaxially provided adjacent to the outer end of the movable discharge pipe, and an electric screw conveyer coaxially mounted in the movable discharge pipe and the fixed discharge pipe ( 14) and a drive cylinder (15) for rotating the movable discharge pipe, which is a cake discharge device for a horizontal centrifugal filter.