JP2007050384A - Solid-liquid separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid-liquid separator with superior discharge performance of fine solid, leaving no solid attached to a wedge wire screen surface, efficiently preventing clogging, and particularly effective when used for a thickener of sludge. <P>SOLUTION: Drive chains 9, 9a of a scraper 13 travel within travel guides 18, 18a only in a traveling region where the scraper 13 rises. A rotary brush 25 is rotatably held between rotary brush drive chains 23, 23a, and drive gears 26, 26a are mounted on a brush shaft 25a of the rotary brush 25. The gears 26, 26a rotate by action of racks 27, 27a when the rotary brush 25 rises or lowers to remove clogging of the screen 3 from its rear side by brushing. A pressing force of blades 12 of the scraper 13 onto a screen 2 is adjustable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a solid that is mixed in water, particularly a fine solid or slime is received on the wedge wire screen surface, and is scraped up with a scraper and discharged out of the machine from the screen surface, And a solid-liquid separator capable of preventing clogging of the screen by running while rotating the brush along the back surface of the screen, particularly in a concentrating device such as sludge, in its pretreatment stage. The present invention relates to a solid-liquid separator used in the above.

The present applicant has proposed a wedge wire screen described in Japanese Patent Application Laid-Open No. 2003-190889.
This wedge wire screen has a high cleaning efficiency and a high durability configuration. The screen surface 2 is formed by the wedge wire, and the cleaning rotary brush 8 that reciprocates left and right on the back side of the screen surface 2 is provided. The screen surface 2 is cleaned from the back using the rotating brush 8 to efficiently prevent clogging. In addition, by controlling the geared motor 22 with an inverter, the speed at the time of reversal is controlled so as to soften the mechanical shock, and the durability is improved by the unreasonable drive control suitable for the object to be processed. It is a devised configuration.

  However, in the case of the wedge wire screen, the waste water is caused to flow on the screen surface 2 to cause the water to flow downward from the screen surface 2, and the solid matter received on the screen surface 2 is dropped downward along the screen surface 2. It is the structure which discharges outside. For this reason, it is effective when the solid matter is difficult to adhere to the screen surface.For example, when it is easy to adhere when wet, such as hair, paper, or leaves, it adheres to the screen surface, and from the back. No matter how much brushing, there is a problem that such deposits cannot be discharged from the screen surface 2.

In addition, instead of a method of dropping solid matter along the screen surface 2 in this way, a dust remover (sewage, sewage waterway) that scrapes the solid matter adhering to the screen surface 2 along the screen surface 2 and discharges it outside the machine. Japanese Patent Application Laid-Open No. 9-019655 discloses a screen residue and sand sinking device.
The contents of this dust remover are sewage and sewage sewage, sediment sinking equipment, and are installed at a slant to the sewage to reduce equipment size, save labor, and save power. A bar screen 2 for stopping the residue, a sand settling part 1 for setting sand in the sewage in the downstream water channel, a drive gear 31 on the upper part of the bar screen, a lower part of the bar screen, and a downstream part of the sand settling part. Gears 32 and 33 are provided and endless chains 34 are stretched, and a large number of them are attached to the chain at equal intervals. Sand sinking and slag moving means provided with rake claws 38 for lifting the screen residue of the bar screen upward, an unloading conveyor 5 for unloading the residue to the outside of the apparatus, and a sand unloading conveyor arranged in parallel below 6 and con In which characterized in that a grit 吸揚 up means connected in the pipe between the Ya and the sand reservoir.

However, in the case of this apparatus, the solid matter adhering to the surface of the screen 2 can surely be lifted up and discharged to some extent, but for example, like hair attached to the width of each bar, or pig or cow In the case of relatively short hair or slime-like deposits such as body hair, it is often difficult to lift and discharge, and it often remains attached to the surface of the bar. It is necessary to clean the surface.
Further, in the case of this known example, if the rake claw 38 is strongly pressed against the surface of the screen 2 in order to increase the scraping rate, the rake claw 38 and the screen 2 are heavily worn, the durability deteriorates and the rake claw 38 is replaced. And the repair of the screen 2 is necessary, so even if some scraping rate is sacrificed, the pressure contact force is weakened, and as a result, the solid matter adhering to the screen surface cannot be discharged completely. There is.
JP 2003-190889 A Japanese Patent Laid-Open No. 9-019655

  The present invention has been proposed in view of such points, and its purpose is excellent in the performance of discharging fine solids, solids do not remain on the screen surface, and clogging is efficiently performed. It is another object of the present invention to provide a solid-liquid separation apparatus that can prevent the problem.

In order to achieve the above object, according to the first aspect of the present invention, in the solid-liquid separator using the wedge wire screen, the solid matter adhering to the front of the screen is lifted up while rising along the front of the screen. In addition to providing a scraper that discharges to the outside of the screen, the solid-liquid separation is provided with a rotating brush that removes clogging on the screen by rotating up and down and reciprocating while rotating in contact with the back of the screen. In the device
Forming an inverted V-shaped water-permeable gap between the bars forming the screen surface;
The scraper is mounted on both sides of the screen, with both left and right ends being attached between scraper drive chains spanned between scraper drive sprockets arranged above and below both sides of the front side of the screen surface. The scraper drive chain is configured to travel in a scraper drive chain travel guide disposed along both sides of the screen in a travel region where the scraper ascends along the screen surface,
The rotating brush is rotatably held between rotating brush drive chains spanned between rotating brush drive sprockets arranged above and below both sides on the back side of the screen surface, and the brush shaft of the rotating brush Drive gears are attached to both ends of this, and these drive gears are meshed with racks arranged in areas where the rotary brush rises on both sides of the back of the screen, and while the rotary brush is raised or lowered, The rotary brush is driven forward or reverse by the action of the drive gear and the rack, and as a result, the screen is brushed from the back side to prevent clogging.
It is characterized by.

Furthermore, in the invention according to claim 2, in the solid-liquid separator using the wedge wire screen according to claim 1, a flexible and elastic blade made of rubber or resin is attached to the scraper. It is characterized by being.
According to the present invention, since the blade is wiped off while the blade is in close contact with the screen surface by soft touch, even a fine object such as hair can be efficiently discharged.

Furthermore, in the invention according to claim 3, in the solid-liquid separator using the wedge wire screen according to claim 2, the root of the blade is detachably clamped by two press plates, The side is characterized by being free.
According to the present invention, when the blade is worn or when the strength of the blade is required depending on the application, only the blade can be easily replaced.

Furthermore, in the invention according to claim 4, in the solid-liquid separator using the wedge wire screen according to claim 1, in the region where the scraper ascends, the scraper is brought into contact with the scraper from the back to the screen surface. A scraper pressure contact means for pressure contact is provided.
According to this invention, the blade force of the scraper can always be kept constant and the polishing performance can be maintained.

Furthermore, in the invention described in claim 5, in the solid-liquid separation device using the wedge wire screen according to claim 4, a pressure contact force control means is added to the scraper pressure contact means. To do.
According to the present invention, it is possible to arbitrarily adjust the blade force and solve the shortage of the pressure contact force.

Furthermore, in invention of Claim 6, in the solid-liquid separator using the wedge wire screen of any one of Claims 1-5, the said rotary brush is reciprocating along the back surface of a screen. As shown, the left and right rotary brush drive chains are mounted with two docks with their positions shifted between the left and right rotary brush drive chains. It is attached to the airframe in the vicinity of the drive sprocket, and the rotary brush reciprocates along the back of the screen by controlling the rotation of the drive motor of the rotary brush drive chain in the forward or reverse direction by the action of these two docks and two limit switches. A control circuit for controlling to move is provided.
According to the present invention, the brushing effect can be further enhanced.

Furthermore, in invention of Claim 7, in the solid-liquid separator using the wedge wire screen of any one of Claims 1-6, the bristles of the said rotating brush are screened from the water-permeable gap of a screen. The position of the rotating brush is set so that a small amount protrudes in front of the lens.
According to the present invention, it is possible to effectively brush everything in the water-permeable gap.

[Action]
The solid-liquid separator is incorporated in a waste water channel, a liquid receiving tank, a separator, a sludge concentrator, or the like. Waste water (sludge) mixed with solid matter is thrown into the screen surface. As for the waste water input in this way, solid liquid is separated on the screen surface, and only the waste water flows down from the water-permeable gaps of the bars constituting the screen surface to the back side. In this way, the solid matter mixed in the wastewater is separated.
The solid matter received on the screen surface is swept up by a scraper rising along the screen surface and discharged out of the screen.
On the other hand, on the back side of the screen, the rotating brush scrapes away the deposits adhering to the back side of the bar and the reverse V-shaped water-permeable gap, and repeatedly moves up and down along the back side of the screen to prevent clogging. And always keep the screen in the best condition.

As described above, the present invention is configured such that the scraper drive chain travels along the travel guide when the solid matter received on the screen surface is scraped up by the scraper and discharged to the outside of the machine.
As a result, the movement of the scraper attached to the scraper drive chain is stabilized, and in particular, the force of the blade pressed against the screen surface is constant from the lower part to the upper part of the screen surface, so that the scraping rate is constant.
Therefore, regardless of the size of the solid material, it is possible to stably fry up the entire screen.
Further, the blade pressure contact is made uniform by the action of the scraper pressure contact means, and the pressure contact force is arbitrarily adjusted by the pressure contact force control means, so that the solid-liquid separation performance suitable for the application can be exhibited.

Further, in the present invention, by forming an inverted V-shaped water-permeable gap between the bars forming the screen, fine solids can be separated and the tip of the rotating brush has the inverted V-shaped gap. Because it penetrates smoothly into the interior, the brushing effect can be improved, the screen can be prevented from clogging, the performance can be maintained for a long time, and the maintenance and maintenance costs can be reduced. As a result, it is effective when used for solid-liquid separation in the previous stage, particularly in a sludge concentrator.
Moreover, clogging of the fine gaps can be effectively prevented by causing the hair tips of the rotating brush to protrude slightly from the water-permeable gaps to the screen surface.
In addition, since the scraper blade is made of an elastic body such as rubber, the scraper moving load is not so much increased even if the pressure contact force against the screen surface is increased, and the scraper is worn by frictional force. In the case of an elastic body, fine solids such as hair or slime can be efficiently discharged by the wiping action.

In addition, since the blade is detachably attached between the two pressing plates, it can be worn or easily replaced with a new one or a blade having a different elastic force depending on the application.
Further, by reciprocating the rotating brush, the direction of brushing is changed, and clogging can be prevented more effectively.

Based on FIGS. 1-8, the Example of the solid-liquid separator which concerns on this invention and its effect | action are demonstrated in detail.
1 is a front view of a solid-liquid separator, FIG. 2 is a cross-sectional view showing a part of a bar (wedge wire) constituting a screen, and FIG. 3 is an explanatory view of a side surface and an installation example of the solid-liquid separator shown in FIG. 4 is an explanatory view showing the sweeping range of the rotary brush, FIG. 5 is an explanatory view showing the scraper and the drive unit of the rotary brush, FIG. 6 is an explanatory view of the scraper and the drive chain, and the sprocket part, and FIG. FIG. 8 is an explanatory view of a travel guide portion of the scraper drive chain.

In each of the above drawings, 1 is a solid-liquid separation device, and this device 1 forms a water permeable screen 3 by arranging bars 4 in parallel on the front of a rectangular machine casing 2. The screen 3 receives the solid matter on the front surface, and the water flows out to the back side. As shown in FIG. 2 (A), the screen 3 has water between the bars (wedge wires) 4 having an inverted isosceles triangle shape. And a water-permeable gap (filtration gap) 5 through which fine solids do not pass is formed, and the water-permeable gap 5 is an inverted V-shaped gap between the bars 4 as shown in FIG. have been, entrance W is narrow, exit W ₁ is wide. For this reason, water can flow smoothly. Moreover, by using this inverted V shape, the bristles of the rotating brush enter the water-permeable gap 5 during brushing, which will be described later, and the cause of clogging can be effectively removed.

  Reference numeral 6 denotes a scraping device for scraping the solid matter received on the front surface of the screen 3 and discharging it to the outside of the machine. Scraper drive chains 9 and 9a spanned between the sprockets 7 and 7a and 8 and 8a respectively arranged at the lower part, and a scraper attached between the scraper drive chains 9 and 9a as shown in FIG. The scraper 13 which consists of the rubber | gum blade 12 with which the both ends of the bar | burr 10 were fixed and the base was pinched | interposed with the presser plate 11 was attached to five places at equal intervals.

Reference numeral 14 denotes a scraper drive motor for driving the scraper drive chains 9 and 9a attached to the upper front portion of the machine frame 2, and a rotation shaft 15 of the scraper drive motor 14 is a rotation shaft of the sprockets 7 and 7a. 16 is connected to a drive sprocket 16a by a chain 17, and the rotation is transmitted as follows: motor 14 → rotary shaft 15 → sprocket 7a → scraper drive chains 9 and 9a, and the scraper 13 travels along the front of the screen 3. is there.
As shown in FIG. 8, the scraper drive chains 18 and 18a guide the travel so that the scraper drive chains 9 and 9a are sandwiched by the sliders 19 and 19a from above and below, as shown in FIG. The scraper drive chains 9 and 9a are travel guides, and the drooping of the scraper drive chains 9 and 9a is restricted between the travel guides 18 and 18a so that the pressure contact force of the blades 12 of the scraper 13 against the surface of the screen 3 is constant. Can keep.

  Reference numeral 20 denotes a cleaning device. This cleaning device 20 is a rotating brush that is stretched between sprockets 21, 21 a and 22, 22 a provided on the back surface of the screen 3 in the machine frame 2 and above and below both sides thereof. A rotation shaft 25a of the rotary brush 25 is supported between the drive chain 23, 23a and the travel chain 23, 23a by using a mounting bracket 24, and drive gears 26, 26a are attached to both ends of the rotation shaft 25a. 26 and 26a are made up of racks 27 and 27a meshing from above, respectively, and the rotating brush 25 is raised while contacting the back surface of the screen 3 by the running of the running chains 23 and 23a. Is engaged with the racks 27 and 27a, and thus a rotational force is applied. 3 and 4, two rotating brushes 25 are shown in the upper and lower directions, but this shows an upper limit and a lower limit, and there is one rotating brush 25.

In FIG. 5, reference numerals 28 and 28a denote means for preventing the rotary shaft 25a of the rotary brush 25 from being lifted, and the rotary brush drive chain 23 is used to hold the guide rollers 29 and 29a attached to the outside of the drive gears 26 and 26a. , 23a, and the presser guides 30 and 30a attached to the machine frame 2 in a downward direction are support guides for the rotary brush drive chains 23 and 23a.
1 and 3, reference numeral 31 denotes a drive motor for running the rotary brush drive chains 23 and 23a. A drive sprocket 33 attached to the rotary shaft 32 and a driven sprocket 34 on the sprocket 21 side are: They are connected by a chain 35.

In FIG. 3, 36 is a water receiving tank in which the above-described apparatus 1 is set obliquely, 37 is a waste water inlet, and 38 is a waste water outlet.
As shown in FIG. 3, the apparatus 1 is set obliquely in a water receiving tank 36, and waste water containing solid matter is introduced into the water receiving tank 36 from a waste water introduction port 37. In addition, as an example of installation of the apparatus 1, there is an example in which the apparatus 1 is installed horizontally or close to this.
Since the introduced wastewater is drained from the wastewater discharge port 38, the wastewater flows in the water receiving tank 36 via the screen 3 of the set device 1. In this flow, the solid matter is received on the surface of the screen 3. The scraper 13 of the scraping device 6 transmits the rotation of the motor 14 to the scraper drive chains 9 and 9a, and the chains 9 and 9a travel to move the front of the screen 3 upward. During this movement, the solid matter received on the surface of the screen 3 is lifted up by the blade 12 and discharged from the upper end of the screen 3 to the outside of the apparatus.

  On the other hand, the rotating brush 25 of the apparatus 1 moves along the back surface of the screen 3 by the traveling of the rotating brush drive chains 23 and 23a by the rotation of the motor 31, and rotates by the action of the drive gear 26a and the rack 27 during this movement. . As a result, the bristles of the rotating brush 25 enter the water-permeable gap 5 of the bar 4 on the back surface of the screen 3 to prevent clogging. As shown in FIGS. 1 and 4, the rotary brush 25 has two limit switches 40 shown in FIGS. 9 to 12 in the vicinity of the sprockets 21 and 21 a, which are attached to the machine frame 2 and a rotary brush drive chain. When the dock 41 attached at a different position at 23 and 23a contacts the contact 40a, the permeation gap is cleaned while reciprocating the rotary brush 25 up and down by controlling the drive motor 31 forward and reverse, Prevent clogging. Thus, since the scraper drive chains 9, 9a travel endlessly, the scraper 13 moves in one direction, but the rotating brush 25 performs cleaning by reciprocating motion. However, the rotary brush drive chains 23 and 23a may also be moved in one direction by being configured to run endlessly. However, reciprocating motion is effective for preventing clogging.

  In the above apparatus 1, the scraper drive chains 9 and 9a can move the scraper 13 in a straight line since the swinging and the ups and downs are regulated by the traveling guides 18 and 18a in the forward traveling. By the action, the solid material can be swept up and discharged so that the blade 12 wipes off.

  FIG. 13 and FIG. 14 are examples of devices for keeping the scraping efficiency constant by pressing the scraper 13 uniformly against the surface of the screen 3 while the scraper 13 is raised. The pressure contact guide 42 is disposed in the ascending range, and the guide pin 43 protruded from the scraper 13 travels within the pressure contact guide 42, so that the pressure contact force can be kept uniform in the ascending range of the scraper 13. 13 and 14, the pressure contact guides 42 are two on the left and right, but one or two or more may be configured in the center.

  FIGS. 15 and 16 are examples in which the pressure contact force of the scraper 13 is adjustable. A spring 43 is attached to the guide pin 44 and the scraper 13 is elastically pressed against the screen 3 surface by the force of the spring 44. For example, FIG. 16 shows an example in which the plate spring 45 is pressed. Reference numeral 46 denotes an adjusting nut for fixing the guide pin 44. By adjusting the length (width) of the guide pin 44 by tightening the adjusting nut 46, the force with which the scraper 13 presses against the screen 3 surface is adjusted. Can be adjusted.

1. Solid-liquid separation from various wastewaters 2. Solid-liquid separation in the food processing field Solid-liquid separation in sludge concentrator

Front view of the device (A) is an explanatory view of a screen, (B) is an explanatory view of a scraper. Side view of device and explanatory diagram of installation example Explanatory drawing showing the sweeping range of the rotating brush Explanatory drawing which shows the drive part of a scraper and a rotating brush Illustration of scraper, drive chain, sprocket part, Explanatory drawing of rotating brush, this drive chain and rotating mechanism Illustration of travel guide part of scraper drive chain Side view of dock attached to chain Front view of dock attached to chain Explanatory drawing of contact between limit switch and dock attached to chain Front view of limit switch Illustration of scraper pressure welding means Illustration of scraper pressure welding means Explanatory drawing of scraper pressure adjusting means using spring Explanatory drawing of scraper pressure adjusting means using leaf spring

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solid-liquid separator 3 Screen 5 Crevice 9, 9a Scraper drive chain 12 Blade 13 Scraper 18, 18a Scraper drive chain travel guides 23, 23a Rotary brush drive chain 25 Rotary brush

Claims (7)

Provide a scraper that lifts along the front of the screen, scrapes solid matter adhering to the front of the screen and discharges it outside the screen, and moves up and down and reciprocates while rotating in contact with the back of the screen. In the solid-liquid separation apparatus having a configuration provided with a rotating brush that removes clogging on the screen,
Forming an inverted V-shaped water-permeable gap between the bars forming the screen surface;
The scraper is mounted on both sides of the screen, with both left and right ends being attached between scraper drive chains spanned between scraper drive sprockets arranged above and below both sides of the front side of the screen surface. The scraper drive chain is configured to travel in a scraper drive chain travel guide disposed along both sides of the screen in a travel region where the scraper ascends along the screen surface,
The rotating brush is rotatably held between rotating brush drive chains spanned between rotating brush drive sprockets arranged above and below both sides on the back side of the screen surface, and the brush shaft of the rotating brush Drive gears are attached to both ends of this, and these drive gears are meshed with racks arranged in areas where the rotary brush rises on both sides of the back of the screen, and while the rotary brush is raised or lowered, The rotary brush is driven forward or reverse by the action of the drive gear and the rack, and as a result, the screen is brushed from the back side to prevent clogging.
A solid-liquid separator using a wedge wire screen.   2. The solid-liquid separator using a wedge wire screen according to claim 1, wherein a flexible and elastic blade made of rubber or resin is attached to the scraper.   The solid-liquid separation device using a wedge wire screen according to claim 2, wherein the blade has a base that is detachably sandwiched between two pressing plates, and has a free end.   The scraper pressure contact means for contacting the scraper from behind and pressing the scraper against the screen surface is provided in a region where the scraper ascends. Liquid separation device.   5. The solid-liquid separation device using a wedge wire screen according to claim 4, wherein a pressing force control means is added to the scraper pressing means.   The left and right rotary brush drive chains are mounted with two docks shifted in position between the left and right rotary brush drive chains so that the rotary brush reciprocates along the back of the screen. The limit switch with which the abutment is in contact is mounted on the fuselage near the upper left and right drive sprockets of the rotary brush drive chain, and the rotation of the drive motor of the rotary brush drive chain is rotated forward or reverse by the action of these two docks and two limit switches. A solid-liquid using a wedge wire screen according to any one of claims 1 to 5, further comprising a control circuit for controlling the rotary brush to reciprocate along the back surface of the screen. Separation device.   The position of the rotary brush is set so that a small amount of the bristles of the rotary brush protrudes from the water-permeable gap of the screen to the front of the screen. The fixed wire using the wedge wire screen according to any one of claims 1 to 6. Liquid separation device.

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