KR100725466B1 - Smooth Filter Device for Wastewater of Paper Process - Google Patents

Abstract

Installed inside the outer tank and the outer tank into which the process wastewater flows so that the process wastewater containing the blanket and impurities generated in the compression and dehydration process of the paper industry can be collected and re-introduced into the process using gravity. And an inner tank formed of a ring-shaped cylinder with an upper opening and inclined toward the center of the inner surface of the inner tank where the purified water is discharged, and a plate-shaped mesh filtration for filtering the follicles and impurities contained in the process wastewater. A member, a discharge pipe installed at the center of the inner tank and discharged the follicles or impurities filtered by the mesh filtration member, and a follicle or impurities filtered on the mesh filtration member by spraying water and installed at the upper part of the mesh filtration member. Provided is a wastewater selection apparatus of a papermaking process comprising an injection mechanism for moving the back toward the discharge pipe.

Papermaking, Wastewater, Selected, Filtration, Mesh, Tank, Screen, Sludge, Spraying, Washing, Gravity

Description

Wastewater Selector of Papermaking Process {Smooth Filter Device for Wastewater of Paper Process}

1 is a longitudinal sectional view showing an embodiment of a wastewater selecting apparatus of the papermaking process according to the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a cross-sectional view taken along the line B-B in FIG.

The present invention relates to a wastewater selection apparatus of the papermaking process, and more particularly, the filtration is performed in a natural drop method using gravity, and the filtered impurities are discharged separately, thereby preventing the generation of backwash water and effectively filtering long fibers and the like. The present invention relates to a wastewater selecting apparatus of a papermaking process.

In general, the paper industry is known as an industrial field that uses a large amount of water and generates a lot of wastewater, and installs a selection facility to reduce water consumption by recycling wastewater.

The conventional method for selecting wastewater is a bow screen (Bow Screan) or a cylindrical sealed type in which the process wastewater is filtered while flowing down by spraying white water at the tangential angle of the sheave from the nozzle at the top. Uni-Filter and the like of filtering the filter by passing through the flotation layer installed in the filter.

In the case of the bow screen, the initial installation cost and the maintenance and maintenance costs are low, and the filtered water quality is good, but the waste water generated is about 50%, and the economic efficiency is low due to the large amount of white water including raw materials. As it is closed type, it is difficult to operate and high concentration of process wastewater has serious disadvantages such as severe pollution of network and high amount of backwash water.

In the case of the uni-filter, the process trouble caused by the media may be generated when the waste water treated reusable water is used, and the filtration efficiency is lower than that of other filters, and the long fiber which is the raw material of the paper contained in the process waste water is showered. There is a problem such as being discharged through the shower.

An object of the present invention is to solve the above problems, it is made to recover the process wastewater containing the hair follicles and impurities generated in the compression and dehydration process of the paper industry, and to re-introduced into the process by using gravity. It is to provide a wastewater selection apparatus of the papermaking process.

The wastewater selection apparatus of the papermaking process proposed by the present invention includes an outer tank into which the process wastewater is introduced, an inner tank formed in a ring-shaped tube installed inside the outer tank and opened at an upper portion thereof, and having a purified water discharged therein, A plate-shaped mesh filtration member installed on the upper surface of the inner tank inclined toward the center and filtering the follicles and impurities contained in the process wastewater, and a morphophore installed in the center of the inner tank and filtered by the mesh filtration member. And a discharge pipe for discharging impurities and impurities, and an injection mechanism installed on the mesh filtration member and spraying water to move the follicles and impurities filtered on the mesh filtration member toward the discharge pipe.

The injection mechanism is rotated by receiving a rotational power source, the rotational power of the rotational power source and the rotation shaft is formed therein and a flow path for moving the water therein, is divided radially and is installed radially in the lower end of the rotary shaft and a plurality of along the longitudinal direction The nozzle is installed and is connected to the flow path of the rotating shaft comprises a plurality of shower pipes to move the water inside.

Next, a preferred embodiment of the wastewater selection apparatus of the papermaking process according to the present invention will be described in detail with reference to the drawings.

First, an embodiment of the wastewater selection apparatus of the papermaking process according to the present invention, as shown in Figures 1 to 3, the outer tank 10 into which the process wastewater is introduced, and installed inside the outer tank 10 and the upper portion Is formed in a ring-shaped tube with an opening, and the inner tank 20 through which the purified water is discharged is installed, and is inclined toward the center on the opened upper surface of the inner tank 20 to filter the follicles or impurities contained in the process wastewater. The plate-shaped mesh filtration member 40, the discharge pipe 30 is installed in the central portion of the inner tank 20 and the hair follicles and impurities filtered by the mesh filtration member 40 is discharged, and the mesh filtration It is provided on the upper portion of the member 40 and comprises a spraying mechanism 50 for spraying water to move the hair follicles and impurities filtered in the mesh filtration member 40 toward the discharge pipe 30.

The outer tank 10 is formed of a ring-shaped barrel consisting of an inner wall 14 installed to surround the outer circumference of the inner tank 20 and an outer wall 12 positioned at a predetermined distance from the inner wall 14. do.

The outer wall 12 and the lower end of the inner wall 14 are connected to each other in a closed state by the ring-shaped bottom plate 15.

The outer wall 12 is installed higher than the inner wall 14, and it is also possible to cover the top with a cover 16, if necessary.

The inner wall 14 is installed higher than the inner tank 20, the height is set so that the process waste water flows toward the inner tank 20 from the upper portion of the mesh filtration member 40.

An inlet 18 through which the process wastewater flows is installed at one side of the outer wall 12 of the outer tank 10.

The process wastewater introduced into the space between the outer wall 12 and the inner wall 14 of the outer tank 10 through the inlet 18 is gradually filled from the bottom plate 15, and the inner wall 14 is opened. It overflows to the inner tank 20 beyond.

The inner tank 20 is installed inside and adjacent to the inner wall 14 of the outer tank 10, the outer wall 22 is installed to a lower height than the inner wall 14 of the outer tank 10, and the outer wall It consists of an inner wall 24 provided at predetermined intervals from 22.

The outer wall 22 and the lower end of the inner wall 24 are connected to each other in a closed state by a ring-shaped bottom plate 25.

The inner wall 24 of the inner tank 20 is preferably installed at a height lower than that of the outer wall 22 in order to install the mesh filtering member 40 inclined toward the center.

The bottom plate 25 of the inner tank 20 is provided with an outlet 28 through which the purified water filtered by the hair follicles and impurities is discharged.

The discharge pipe 30 is installed at a lower height than the central end of the mesh filter member 40 so that a blanket or impurities flowing along the inclined surface from the mesh filter member 40 naturally flow into the discharge pipe 30. do.

The mesh filtration member 40 is made of a mesh screen of a size that can filter (filter out) the hair follicles or impurities generated in the papermaking process, or a perforated plate having many fine holes arranged therein, From the outer wall 22 side of the inner tank 20 toward the inner wall 24 is installed with an inclined surface gradually lowered in height.

The injection mechanism 50 is rotated by receiving the rotational power source 51, the rotational force of the rotational power source 51 and the rotating shaft 52 is formed therein a flow path for moving water, and the lower end of the rotating shaft 52 A plurality of showers (for example, 2 to 8) in which the nozzles are divided radially and radially installed, and a plurality of nozzles 55 are installed along the longitudinal direction and connected to a flow path of the rotary shaft 52 to move water therein. It comprises a pipe 54.

A motor, a rotary cylinder, or the like may be used as the rotary power source 51, and the rotary force of the rotary power source 51 is transmitted to the rotary shaft 52 through a power transmission device such as a gear, a belt, and a chain.

The rotating shaft 52 is formed of a hollow shaft, the inside of which is connected to the water supply pipe 56 is supplied with washing water at one end.

The shower pipes 54 are arranged at intervals of 120 ° in the case of three, and are arranged at intervals of 90 ° in the case of four.

One embodiment of the wastewater selecting apparatus of the papermaking process according to the present invention is installed on one side of the outer tank 10 (for example, the inner wall 14), and the process wastewater filling from below is filled with It is also possible to provide a sludge collecting member 60 in which impurities with a high specific gravity are collected by gravity.

The sludge collecting member 60 is formed to form a recess along the inner wall 14 of the outer tank 10, the drain portion 68 for discharging the collected sludge is connected to one side.

Next, the filtration process of the process wastewater by the wastewater selection apparatus of the papermaking process according to the present invention configured as described above will be described.

First, when the process wastewater continues to flow through the inlet 18, the process wastewater fills the space between the inner wall 12 and the outer wall 14 from the bottom plate 15 side of the outer tank 10. . When the process wastewater is filled to a height higher than the inner wall 12, the process wastewater overflows the inner wall 12 and flows toward the inner tank 20. At this time, because the process wastewater that passes over the inner wall 12 is large in fluidity, it is distributed evenly over the entire circumference of the inner tank 20 due to gravity and is supplied to the mesh filtration member 40.

Part of the sludge contained in the process wastewater flowing over the inner wall 12 and flowing toward the inner tank 20 is collected in the sludge collecting member 60. In addition, since the sludge or impurities having a high specific gravity are slow to move upward, impurities or water having a low specific gravity in the process wastewater first move upwards to overflow to the inner tank 20, and the mesh filter member 40 is easily moved. Passed through and discharged to the inner tank (20).

Subsequently, when the process wastewater containing sludge or impurities gradually overflows the inner wall 12 of the outer tank 10 toward the mesh filtration member 20, it moves along the inclined mesh filtration member 20 to gravity. Moisture is discharged toward the inner tank 20, and the hair follicle or impurities are caught by the mesh filtration member 20 and filtered. At this time, if the width of the mesh filtering member 20 (the gap between the inner wall 24 and the outer wall 22 of the inner tank 20) is sufficiently maintained, the process waste water is evenly distributed and moved to the mesh filtering member 20. While the contained moisture is sufficiently discharged toward the inner tank 20, the recovery rate of the process water is greatly improved.

When the filtration is completed, the process water collected in the inner tank 20 is filtered and discharged through the outlet 28 to be reused, and the rotary power source 51 of the injection mechanism 50 is operated to take a shower. The washing water is sprayed through the nozzle 55 of the pipe 54. Therefore, the solids such as the mortar and impurities filtered through the mesh filtration member 20 by the washing water sprayed through the nozzle of the rotating shower pipe 54 are completely cleaned and moved to the discharge pipe 30 to discharge. As the washing water, it is also possible to use a part of the process water discharged to the outlet 28 of the inner tank 20.

The wastewater selection apparatus of the papermaking process according to the present invention is filtered through a natural dehydration action by gravity and impurities contained in the process wastewater through the above process, and the filtered process water is reused.

In the above, a preferred embodiment of the wastewater selection apparatus of the papermaking process according to the present invention has been described. However, the present invention is not limited thereto, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible and this also belongs to the scope of the present invention.

According to the wastewater selection apparatus of the papermaking process according to the present invention as described above, because the process wastewater discharged from each process is filtered by a natural drop method using gravity, the recovery rate of the process water is high, economical, reused filtered process water As a result, the overall consumption of industrial water is reduced. In addition, since the amount of heat contained in the process water can be reused, energy consumption can be reduced by heating the industrial water in each process.

According to the wastewater selecting apparatus of the papermaking process according to the present invention, the amount of sludge generated is reduced by reducing the discharged wastewater, and the load of the wastewater treatment can be reduced.

In addition, according to the wastewater selecting apparatus of the papermaking process according to the present invention, since the mesh filtration member is used without using the floating filter, the occurrence of process trouble is reduced, and impurities are effectively filtered.

In addition, according to the wastewater selection apparatus of the papermaking process according to the present invention, there is no need to constitute a completely sealed type in the structure, it is easy to operate and wash the mesh filter member.

Claims (5)

An outer tank into which the process wastewater flows in, an inner tank formed inside of the outer tank and formed with a ring-shaped cylinder with an open upper portion, and a purified water discharged from the inner tank, and a ramp lowering toward the center on the opened upper surface of the inner tank. A plate-shaped mesh filtration member installed at the center and filtering the follicles and impurities contained in the process wastewater, a discharge pipe installed at the center of the inner tank and discharged the morphology and impurities filtered by the mesh filtration member; It is installed on the upper portion of the mesh filter member and comprises a spraying mechanism for spraying the water to move the follicles and impurities filtered on the mesh filter member toward the discharge pipe, The outer tank is an inner wall that is installed to surround the outer circumference of the inner tank, the outer wall is located at a predetermined distance from the inner wall and installed higher than the inner wall and the inlet through which the process wastewater is introduced, and the outer wall And a ring-shaped bottom plate connecting the lower end of the inner wall with each other in a closed state, The inner tank is installed inside and adjacent to the inner wall of the outer tank and the inner wall is installed at a height lower than the inner wall of the outer tank, the inner wall is installed at a predetermined distance from the outer wall and installed at a height lower than the outer wall and And a ring-shaped bottom plate connected between the outer wall and the lower end of the inner wall in a closed state and provided with an outlet through which a purified water from which a mortar and impurities are filtered is discharged. delete The method according to claim 1, The mesh filtration member is a wastewater screening device of the papermaking process consisting of a mesh screen or a perforated plate in which many fine holes are arranged. The method according to claim 1 or 3, The injection mechanism is rotated by receiving a rotational power source, the rotational power of the rotational power source is formed inside the flow path for moving the water and the water supply pipe is connected to one end of the washing water supply, and is conformal to the lower end of the rotary shaft The wastewater selecting apparatus of the papermaking process, which comprises two to eight shower pipes divided into roads and radially installed and a plurality of nozzles are installed along a longitudinal direction and connected to the flow path of the rotating shaft to move water therein. The method according to claim 1 or 3, And a concave groove-shaped sludge collecting member installed on one side of the outer tank and collecting impurities having a high specific gravity by gravity when the process wastewater filling from below rises.

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