JPH0730718Y2 - Separation equipment for papermaking - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is applied to the disintegration piece, the foreign matter (metal piece, stone, plastic piece, styrene piece, vinyl piece, etc.) in waste paper processing or waste paper processing such as newspapers and magazines. The present invention relates to a papermaking screen device for reject treatment, which disintegrates powdery disintegrated pieces from a papermaking raw material containing a) and discards foreign substances to the outside of the system.

[Conventional technology]

Generally, in papermaking equipment such as waste paper processing and waste paper processing, the disintegrated fragments in the fiber suspension, which is a raw material,
In order to remove foreign matters such as sand, metal pieces, resin pieces, etc., and other dust, a screen device with a large number of round holes or slits is used to partition the interior of the closed casing to partition the screen. Cyclone combined with a separator equipped with an impeller that rotates along a screen plate in a closed casing in order to increase the dispersibility and improve the disintegration and separator treatment capacity. It is known to increase the function to enhance the foreign matter removing effect.

[Problems to be solved by the device]

However, in this conventional separation device, for example, US Pat.
In order to eliminate the heavy foreign matter by applying the coarse disintegration liquid containing the heavy foreign matter derived from the sorter to the cyclone as in No. 4017033, return the cyclone outlet pipe to a place with a relatively low pressure or from the raw material tank or the raw material tank. If it is connected to the suction side of the raw material supply pump and circulated, the heavy foreign matter returned to the sorter again causes the screen to be clogged, which is undesirable and the separation function must be reduced unless the capacity of the pump is increased. There was no problem.

The present invention intends to properly eliminate these conventional drawbacks, and provides an apparatus capable of significantly enhancing the selective treatment capacity for separating useful fibers and foreign substances, particularly the function of separating heavy foreign substances, in an inexpensive state. This is the purpose.

[Means for Solving the Problems]

According to the present invention, a screen 1 for separating a useful fiber component and a foreign substance component of impurities from a papermaking raw material is arranged in a closed casing 2 in a compartmented state, and the screen 1
A separation device provided with a rotary impeller 3 in close proximity to the cyclone 4 and a cyclone 4 for selectively separating and separating heavy foreign matter are connected by a foreign matter discharge pipe 5 separated by the separating device, and an outlet pipe of the cyclone 4 is provided. 6 is connected so as to join the raw material supply pipe 7 to the casing 2, and the outlet of the outlet pipe 6 is opened into the raw material supply pipe 7 through the elbow pipe 8 to form an ejector. It is a separating device for paper making.

[Action]

The raw material fed into the casing 2 of the separating device in the pulp chests A to B flows through the screen 1 by the useful fibers passing through the impeller 3 rotating near the screen 1, and the foreign matter does not pass through the strainer. Separated and processed. Since the front chamber 12 side of the screen 1 is provided with an impeller 3 which is brought close to the screen surface so as to wipe the screen surface, and an outlet pipe 13 for lightweight foreign matter is provided at the center on the opposite side of the impeller 3, the impeller 3 is fed into the front chamber 12. The raw material is given a swirling and swirling flow in the direction of rotation by the rotation of the impeller 3, and the heavy foreign matter in the raw material is blown to the outer peripheral wall of the front chamber 12 by the centrifugal force accompanying the rotation, and the outlet pipe is swirling the peripheral wall. 5 and is removed by intermittent opening and closing of the valve of the outlet pipe 5, and one light foreign substance (lighter than the raw material) is swirled in the front chamber 12 and swirled in the center of the chamber due to the action of the vortex column. Since the light foreign substances are crowded in the part, the light foreign substance is removed from the outlet pipe 13 to the outside by intermittently opening the valve of the light foreign substance outlet pipe 13 provided in the central portion of the front lid of the front chamber 12 Most of them are removed in the anterior chamber.

The foreign matter mixed liquid introduced from the outlet pipe 5 to the cyclone 4 in a swirling flow collects heavy foreign matter in the central portion by the cyclone action, and exits from the discharge pipe 14 below, and the paper raw material is led out from the outlet pipe 6. From the elbow pipe 8 to the raw material supply pipe 7 by the ejector action and circulates in the casing 2 while merging and circulating, and the circulation of the paper quality from the separating device is improved, the swirling of the paper material in the separating device is good, and heavy foreign matter is removed. It became possible to separate at low pressure. That is, since the elbow pipe 8 is introduced into the flow path of the raw material supply pipe 7 and opened, the suction effect is enhanced, the cyclone action is improved, the heavy foreign matter separating function is enhanced, and the pump capacity for raw material supply is also increased. The device can be small and the running cost can be remarkably reduced.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 6. In order to separate a fiber suspension of a papermaking raw material into a useful fiber component and a foreign substance component of impurities, a screen 1 is partitioned into a closed casing 2 inside the room. A separating device provided in a divided state and provided with a rotating impeller 3 in the vicinity of the screen 1 and a cyclone 4 for separating and separating heavy foreign matter are connected and deployed by a foreign matter outlet pipe 5 separated by the separating apparatus. Of the cyclone 4, the outlet pipe 6 of the cyclone 4 is connected so as to join the raw material supply pipe 7 to the casing 2, and the outlet of the outlet pipe 6 is opened into the raw material supply pipe 7 through an elbow pipe 8. The ejector is formed as a separating device for papermaking.

As the separating device, a rotor 15 and a cylindrical screen 1 are provided in a rear chamber 12 ₁ defined by a screen 1 of a casing 2.
A selective raw material chamber 17 provided with an outlet pipe 18 and a foreign matter discharge pipe 1
A rear chamber 12 ₁ having 9 is provided to form a double separator together with the screen 1. A transparent tube 9 is provided in the raw material supply pipe 7 connected to the casing 2 of the separating device to provide a transparent material. It is effective for visual judgment to construct an ejector by providing an elbow pipe 8 on the upstream side of the pipe 9 and to open / close the outlet pipe 6 of the cyclone 4 connected and connected to the elbow pipe 8. It is preferable to interpose a valve 10 and connect it to the cyclone 4 through a reducer 11.
The elbow pipe 8 is introduced into the center of the raw material supply pipe 7 and opened to enhance the suction effect and improve the cyclone action.

The elbow pipe 8 needs to be connected and connected so that the opening end of the elbow pipe 8 faces the flow passage cross section of the raw material supply pipe 7 and is opened. Since it is not formed, the outlet end of the elbow pipe may be a nozzle with a slight taper, and the cross-sectional area of the raw material supply pipe 7 side is reduced to a pressurized flow path to improve the ejector effect. You can also choose what to do.

Figure 6 ₁ transparent pipe, 20 a rotating shaft, 21 is a bearing portion, 22 is a motor, the dilution water inlet pipe 23, 24 damper, 25 is a valve.

[Effect of device]

The present invention provides a separation device for separating a useful fiber component and a foreign substance component of impurities from a fiber suspension of a papermaking raw material, and a cyclone for separating and separating heavy foreign substances by the separation device. In what is connected and deployed by the outlet pipe, the outlet pipe of the cyclone is connected so as to join the raw material supply pipe to the casing, and the outlet of the outlet pipe is opened into the raw material supply pipe through the elbow pipe. By forming an ejector, it is possible to separate fine dust accurately and to dissociate useful fibers and foreign substances with great disaggregation ability. Foreign substances such as metal pieces, stones, and other heavy foreign substances that are mixed inside are separated to the outer periphery, collected in the heavy foreign substance discharge section, and discharged into the cyclone through the foreign substance discharge pipe. The elbow pipe connected to the raw material supply pipe enhances the ejector action significantly, and the circulation flow sucked by the cyclone outlet pipe improves the separation effect, and the foreign matter recirculated to the separation device is minimized. It can be operated safely without causing screen clogging, and the raw material supply pump is also compact and inexpensive, providing a separation device at a low cost that enables efficient screen work. be able to.

[Brief description of drawings]

1 is a partially cutaway side view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line I--I of FIG. 1, FIG. 3 is a front view, FIG. 4 is a plan view, and FIG. FIG. 6 is a partially enlarged vertical sectional view, and FIG. 6 is a perspective view of one use state. 1 ... Screen, 2 ... Casing, 3 ... Impeller, 4 ... Cyclone, 5 ... Foreign matter outlet pipe, 6 ... Outlet pipe, 7 ... Raw material supply pipe, 8 Elbow pipe, 9 Transparent pipe, Ten
…… Open / close valve, 11 …… Reducer, 12 …… Front room, 12 ₁ ……
Back room.

Claims (3)

[Scope of utility model registration request] 1. A screen (1) for separating a useful fiber component and a foreign matter component of impurities from a raw material for papermaking is arranged in a closed casing (2) in a partitioned state of the room, and the screen (1) is provided. Foreign matter discharge pipe (5) obtained by separating a separating device provided with a rotating impeller (3) close to the air conditioner and a cyclone (4) for separating and separating heavy foreign matter by the separating device.
In the case where the outlet pipe (6) of the cyclone (4) is joined to the raw material supply pipe (7) to the casing (2), the outlet of the outlet pipe (6) is connected to the elbow. A papermaking separation device, characterized in that an ejector is formed by opening the raw material supply pipe (7) through a pipe (8). 2. A ejector is constructed by disposing a transparent pipe (9) in the raw material supply pipe (7) and providing an elbow pipe (8) on the upstream side of the transparent pipe (9). Separation device for papermaking. 3. An on-off valve (10) is interposed between an outlet pipe (6) of a cyclone (4) connected to the elbow pipe (8), and the cyclone (4) is provided via a reducer (11). 3. The separation device according to claim 1, which is connected to.