JP7271840B2 - Strainer and coarse particle remover - Google Patents

Description

TECHNICAL FIELD The present invention relates to a strainer and a coarse particle removing device for removing coarse particles from slurry.

Conventionally, in order to remove a small amount of solids mixed in the liquid, a general Y-shaped strainer or U-shaped strainer is used, and in order to remove the solid components in the slurry, a screen or a screw is rotated to solidify by centrifugal force. A solid-liquid separator is used to facilitate liquid separation.

For example, Patent Document 1 discloses a solid-liquid separation device for separating slurry into solid and liquid, which is surrounded by six circumferentially continuous side surfaces, has a hexagonal cross section, and rotates around a rotating shaft. and a casing containing the rotating basket, wherein solid-liquid separation is performed by a rotating slanted screen.

For example, in Patent Document 2, a screw comprising a screw shaft having a water vapor supply hole and a screw blade spirally provided on at least a part of the outer periphery of the screw shaft, and an oil water passage hole, the screw an inner cylinder that surrounds the inner cylinder, an outer cylinder that is installed outside the inner cylinder and forms an oily water discharge gap between the inner cylinder and the inner cylinder, and an oil-containing sludge supply port for supplying oil-containing sludge into the inner cylinder and an outer cylinder side steam supply port for supplying steam into the outer cylinder, and a cylinder end of the inner cylinder on the residual sludge discharge side, which is installed near the cylinder end of the inner cylinder on the residual sludge discharge side. An oil-impregnated oil having a stopper forming a residual sludge discharge gap therebetween, an oil water discharge port for discharging the oil water discharged into the oil water discharge gap to the outside of the apparatus, and a driving means for rotating the screw. A sludge treatment apparatus is described, in which a screw rotates in a screen, and sludge that does not pass through the screen is discharged from a discharge port by the screw to separate solid and liquid.

JP 2010-179233 A JP 2010-194390 A

However, general Y-type strainers and U-type strainers are for removing trace amounts of solids mixed in liquids, and are used for slurry containing coarse particles with a high solid component load. difficult to apply. In general Y-shaped strainers and U-shaped strainers, the solid components fill the screen portion and cause clogging, which causes problems such as poor liquid pumping. On the other hand, Patent Document 1 and Patent Document 2 have a structure that does not block the inside of the screen portion, but the configuration of the device is large-scale, and the electric motor is used, so the electric power cost is high. There were problems such as liquid leakage from the sliding surface.

Therefore, the present invention has been made in view of the above problems, and when removing coarse particles from a slurry containing coarse particles with a high solid component load, it is easy to recover coarse particles without clogging, An object of the present invention is to provide a strainer and a coarse particle removing device which are simple in device configuration.

A strainer according to one aspect of the present invention is a strainer for removing coarse particles from a slurry, and includes a straight pipe having flanges at upper and lower ends, and a pipe branching obliquely downward from the straight pipe. A bypass pipe in which a pipe that descends in parallel with the straight pipe and obliquely merges with the straight pipe is arranged, and a pipe that further branches laterally from the upper bent portion of the bypass pipe is arranged and then arranged downward. and an outlet pipe, a slit parallel to the pipe branching obliquely downward in the straight pipe, and having an upper side on the same plane as the bottom surface of the pipe branching obliquely downward, each of the slits a first slit portion having a width of 10 mm or more, and a slit in the bypass pipe that is parallel to the laterally branched pipe and has an upper side on the same plane as the bottom surface of the laterally branched pipe, It is characterized by having second slit portions each having a width of 10 mm or more.

By doing so, it is possible to provide a strainer that does not cause clogging, allows easy collection of coarse particles, and has a simple device configuration.

At this time, in the bypass pipe, the angle of the pipe branching obliquely downward from the straight pipe may be 30 to 45 degrees with respect to the straight pipe.

In this way, the coarse particles collected by the first slit roll down through the second slit and are easily discharged from the extraction pipe. Also, the amount of slurry flowing down to the second slit portion can be reduced.

At this time, in one aspect of the present invention, the width of the slits of the first slit portion and the second slit portion may be 30 mm or less.

By doing so, it is possible to remove coarse particles larger than 30 mm, which cause serious troubles such as clogging and failure of the device in subsequent steps.

At this time, in one aspect of the present invention, the horizontal thickness of the flat plate forming the first slit portion and the second slit portion may be 3 mm or more.

By doing so, it is possible to prevent deformation of the flat plate due to the impact when the coarse particles collide with each other.

At this time, in another aspect of the present invention, a storage tank for temporarily storing the pulverized slurry overflowing from the wet pulverizer, a strainer for removing coarse particles from the slurry stored in the storage tank, and and a container for collecting coarse particles, wherein the strainer is arranged vertically directly below the storage tank, and includes a straight pipe having flanges at the upper and lower ends, and a straight pipe extending diagonally from the straight pipe. A bypass pipe in which a pipe branching downward is arranged and then descends in parallel with the straight pipe, and a pipe obliquely joining the straight pipe is arranged; and a discharge pipe in an open-to-atmosphere state that is arranged and then arranged downward, and is a slit in the straight pipe that is parallel to the pipe that branches obliquely downward, and the bottom surface of the pipe that branches obliquely downward. A first slit portion having an upper side on the same plane and a width of each slit of 10 mm or more, and a slit parallel to the laterally branching pipe in the bypass pipe and branching laterally The top side is on the same plane as the bottom surface of the pipe, each has a second slit portion with a slit width of 10 mm or more, and the lower end flange of the strainer is connected to a withdrawal pipe, and under the withdrawal pipe is provided with the container.

In this way, it is possible to provide a coarse particle removing device that does not cause clogging, facilitates collection of coarse particles, and has a simple device configuration.

In one aspect of the present invention, the height difference of the extraction pipe may be 0.8 m or more in the vertical direction.

By doing so, the slurry can be sent smoothly without causing the slurry to overflow from the extraction pipe and without entrapping air in the slurry.

According to the present invention, when removing coarse particles from a slurry containing coarse particles with a high solid component load, the strainer and coarse particle removal do not cause clogging, facilitate recovery of coarse particles, and have a simple device configuration. Equipment can be provided.

FIG. 1 is a cross-sectional view schematically showing a strainer according to one embodiment of the present invention. 2A and 2B are enlarged views showing the first slit portion of the strainer according to one embodiment of the present invention, where FIG. 2A is a side view and FIG. 2B is a front view. FIG. 3 is a schematic top view of the top flange of a strainer according to one embodiment of the invention. 4A and 4B are enlarged views showing the second slit portion of the strainer according to one embodiment of the present invention, where FIG. 4A is a side view and FIG. 4B is a front view. FIG. 5 is a schematic diagram of a coarse particle removing device according to another embodiment of the present invention.

In order to solve the above problems, the present inventors have made intensive studies on a strainer that does not cause clogging, can easily collect coarse particles, and has a simple device configuration. The present invention was completed based on the knowledge that the above problem can be solved by providing a strainer having a first slit portion and a second slit portion. Preferred embodiments of the present invention will be described below.

The embodiments described below do not unduly limit the scope of the invention described in the claims, and can be modified without departing from the gist of the invention. Moreover, not all the configurations described in the present embodiment are essential as the solution means of the present invention. Hereinafter, a strainer and a coarse particle removing device according to one embodiment of the present invention will be described in the following order.
1. Strainer 2 . Coarse particle remover

<1. Strainer>
The strainer 100 according to one embodiment of the present invention removes coarse particles contained in slurry. Then, as shown in FIG. 1, a straight pipe 10 which is arranged vertically and has flanges 11 and 12 at its upper and lower ends, and a pipe 21 branching obliquely downward from the straight pipe 10 are arranged, and then the straight pipe 10 is arranged. A bypass pipe 20 in which a pipe that descends in parallel with and obliquely joins the straight pipe 10 is arranged, and a pipe branching laterally from the upper bent portion 22 of the bypass pipe 20 is arranged. a extraction tube 30 in an open state.

For example, when a slurry containing powdery nickel sulfide is pulverized by a vertical wet medium agitation type pulverizer and sent to the next step, alumina balls as pulverization media are caught by the screw and pushed up, or agglomerated nickel The sulfide deposits may be peeled off, and the pulverized slurry that overflows from the pulverizer may escape into a storage tank that temporarily stores the pulverized slurry. As a result, the bottom drain pipe of the storage tank was clogged, making it difficult to continue the wet pulverization operation itself. Therefore, by using the strainer 100 according to one embodiment of the present invention, it is possible to perform a wet pulverization operation with a simple apparatus configuration, which does not cause clogging, and which facilitates recovery of coarse particles.

The strainer 100 according to one embodiment of the present invention is a slit parallel to the pipe 21 branching obliquely downward in the straight pipe 10, and is flush with the bottom surface 21b of the pipe 21 branching obliquely downward. It is characterized by having a first slit portion 40 with an upper side and a width of each slit of 10 mm or more.

Then, the strainer 100 according to one embodiment of the present invention is a slit parallel to the piping branched further laterally from the upper bent portion 22 of the bypass pipe 20 in the bypass pipe 20, and is branched laterally. It is characterized by having a second slit portion 50 having an upper side on the same plane as the bottom surface 22b of the pipe, and having a width of 10 mm or more for each slit.

Slurry pulverized by the wet pulverizer enters from the upper end flange 11 , passes through the straight pipe 10 or the bypass pipe 20 , and is discharged from the lower end flange 12 . On the other hand, coarse particles contained in the slurry move to the pipe 21 branching obliquely downward from the straight pipe 10 while rolling without passing through the first slit portion 40, and without passing through the second slit portion 50, A pipe branching laterally from the upper bent portion 22 of the bypass pipe 20 is further arranged, and then discharged from the extraction pipe 30 opened to the atmosphere, which is arranged downwardly. Since the extraction pipe 30 is open to the atmosphere, if a container for collecting coarse particles is arranged under the extraction pipe 30, the coarse particles can be easily collected.

As shown in FIG. 1 , the straight pipe 10 has an inlet and an outlet for slurry at the top and bottom, respectively, and has an upper end flange 11 and a lower end flange 12 . By doing so, it becomes easy to remove only the strainer, and maintenance and the like become easy. In addition, since it is easy to install, it can be easily replaced with a spare strainer. Therefore, it becomes easy to clean the first slit portion 40, the second slit portion 50, and the straight pipe 10, and even if coarse particles block the inside of the strainer, it can be dealt with quickly.

In addition, since the strainer 100 according to one embodiment of the present invention has not only the first slit portion 40 but also the second slit portion 50, the slurry flowing into the pipe 21 branching obliquely downward from the straight pipe 10 is Since the slurry can be returned to the straight pipe via the two-slit portion 50, the slurry will not flow out from the extraction pipe 30. - 特許庁Further, by flowing the slurry through a pipe 21 branching obliquely downward from the straight pipe 10, it is possible to assist the movement of coarse particles. Furthermore, by allowing the slurry to pass through the second slit portion 50, clogging of the second slit portion 50 can be prevented. Therefore, according to the strainer 100 according to one embodiment of the present invention, it is possible to obtain a device that does not clog, easily collects coarse particles, and has a simple configuration without using an electric motor.

As shown in FIGS. 1 and 2 (A) and (B), the first slit portion 40 is a slit parallel to the pipe 21 branched obliquely downward in the straight pipe 10 and branched obliquely downward. There is an upper side on the same plane as the bottom surface 21b of the pipe 21 to be connected. By doing so, coarse particles are easily discharged.

The width s1 of the slit of the first slit portion 40 is 10 mm or more, preferably 10 to 30 mm. If it is less than 10 mm, clogging may occur. On the other hand, if the width exceeds 30 mm, coarse particles of 30 mm or less may pass through the first slit portion 40 .

The horizontal thickness t1 of the flat plate forming the first slit portion 40 is preferably 3 mm or more. Since the flat plate may be deformed by the drop impact of the coarse particles, it is preferable to set the thickness t1 in the horizontal direction of the flat plate forming the first slit portion 40 to 3 mm or more to improve the impact resistance.

Also, the inclination θ1 of the first slit portion 40 preferably forms an angle of 30 to 45 degrees with respect to the straight pipe 10 . If it is less than 30 degrees, not only the coarse particles but also the slurry will easily move to the pipe 21 branching obliquely downward, the amount of slurry flowing down to the second slit portion will increase, and the slurry will flow out from the extraction pipe 30. more likely. On the other hand, when it is larger than 45 degrees, the first slit portion 40 becomes flat, and the coarse particles collected by the first slit portion 40 are less likely to roll down via the second slit portion 50, and are discharged from the extraction pipe 30. less likely to be If the inclination θ1 of the first slit portion 40 is 30 to 45 degrees with respect to the straight pipe 10, coarse particles can be more easily removed from the extraction pipe 30 without causing the slurry to flow out from the extraction pipe 30. can be discharged.

Further, in the bypass pipe 20, the angle θ2 of the pipe 21 branching obliquely downward from the straight pipe 10 is 30 to 45 degrees with respect to the straight pipe 10, and the angle θ2 of the pipe 20 obliquely joining the straight pipe 10 is It is preferable that the angle θ3 is an angle formed with respect to the straight pipe 10 and is 30 to 45 degrees.

If the angle θ2 of the pipe branching obliquely downward from the straight pipe 10 is less than 30 degrees with respect to the straight pipe 10, the amount of slurry flowing down to the second slit increases, and the slurry flows out of the discharge pipe 30. more likely to flow out. In addition, the distance to merge with the straight pipe 10 becomes long, the strainer itself becomes large, and the maintainability and economic efficiency may deteriorate. On the other hand, when the angle θ2 of the pipe branched obliquely downward from the straight pipe 10 is greater than 45 degrees, the pipe 21 branched obliquely downward from the straight pipe 10 becomes flat, and the coarse particles collected in the first slit portion 40 is less likely to roll down through the second slit portion 50 and is less likely to be discharged from the extraction pipe 30.例文帳に追加If the angle θ2 of the pipe branching obliquely downward from the straight pipe 10 is set to 30 to 45 degrees with respect to the straight pipe 10, coarse particles can be removed more easily without causing the slurry to flow out from the discharge pipe 30. It can be discharged from the withdrawal pipe 30 .

If the angle θ3 of the pipe where the bypass pipe 20 joins the straight pipe 10 obliquely is less than 30 degrees with respect to the straight pipe 10, the distance until joining the straight pipe 10 becomes long, so the strainer itself becomes large, and maintainability and economic efficiency may deteriorate. On the other hand, when the angle is larger than 45 degrees, it becomes difficult for the slurry to be discharged into the straight pipe 10 . Therefore, if the angle θ3 of the pipe that obliquely merges with the straight pipe 10 is set to 30 to 45 degrees with respect to the straight pipe 10, the apparatus will not be unnecessarily large, and the slurry will be discharged due to poor discharge. The slurry can be withdrawn without overflowing the slurry from the tube 30 .

The width w1 of the flat plate forming the first slit portion 40 is preferably 10 to 60 mm. If it is less than 10 mm, there is a risk of deformation due to the impact of dropping coarse particles. If it is larger than 60 mm, the space between the flat plates tends to be blocked.

The distance d1 between the straight pipe 10 and the bypass pipe 20 is preferably 0.5 to 3 times the pipe diameter of the pipe (straight pipe, bypass pipe, extraction pipe). If it is less than 0.5 times, the distance between the straight pipe 10 and the bypass pipe 20 becomes small, so that the distance of the inclined portion becomes short, and the coarse particles do not roll up to the extraction pipe 30 and cannot be discharged well from the extraction pipe. There is In addition, all of the scattered slurry cannot be guided to the bypass pipe, and there is a possibility that the coarse particles will be mixed with the slurry. On the other hand, if it exceeds 3 times, the distance of the inclined portion becomes long, so that coarse particles tend to roll, and it may not be possible to collect all the slurry adhering to the coarse particles.

When the upper end flange 11 of the strainer 100 according to one embodiment of the present invention is viewed from above, it becomes as shown in FIG. 3, and the first slit portion 40 can be visually recognized.

As shown in FIGS. 1 and 4(A) and (B), the second slit portion 50 is a slit parallel to the pipe branching laterally from the upper bent portion 22 of the bypass pipe 20, and is a pipe branching laterally. has an upper side on the same plane as the bottom surface 22b of the . When the bypass pipe 20 is vertical, the second slit portion 50 becomes horizontal. , may flow out to the extraction pipe 30 together with coarse particles.

The width s2 of the slit of the second slit portion 50 is 10 mm or more, preferably 10 to 30 mm. If it is less than 10 mm, clogging may occur. On the other hand, if the width exceeds 30 mm, coarse particles of 30 mm or less may pass through the second slit portion 40 .

The horizontal thickness t2 of the flat plate forming the second slit portion 50 is preferably 3 mm or more. Since the flat plate may be deformed by the drop impact of the coarse particles, it is preferable to set the lateral thickness t2 of the flat plate forming the second slit portion 50 to 3 mm or more to improve the impact resistance.

The width w2 of the flat plate forming the second slit portion 50 is preferably 10 to 60 mm. If it is less than 10 mm, there is a risk of deformation due to the impact of dropping coarse particles. If it is larger than 60 mm, the space between the flat plates tends to be blocked.

The distance d2 between the bypass pipe 20 and the extraction pipe 30 is preferably 0.02 to 0.07 m. If it is less than 0.02 m, construction may become difficult. On the other hand, if it exceeds 0.07 m, the distance to the extraction pipe 30 becomes long, and coarse particles may not be discharged to the extraction pipe 30 in some cases.

As described above, according to the strainer 100 according to an embodiment of the present invention, when removing coarse particles from a slurry containing coarse particles with a high solid component load, clogging does not occur and coarse particles can be easily recovered. A strainer with a simple device configuration can be obtained.

<2. Coarse Particle Removal Device>
A coarse particle removing apparatus 200 according to another embodiment of the present invention, as shown in FIG. A strainer 100 for removing coarse particles 65 from the slurry 60 stored in 75 and a container 90 for collecting the coarse particles 65 are provided.

The above strainer 100 has <1. Use the one described in Strainer>. A withdrawal pipe 80 is connected to the lower end flange 12 of the strainer 100 , and the container 90 is arranged under the withdrawal pipe 30 .

A circulation pump (not shown) or a relay tank (not shown) for returning to the wet pulverizer 70 may be connected to the lower end of the extraction pipe 80 . The relay tank is a tank for relaying the slurry 60, and is, for example, a tank in which the inner surface of a general bottomed cylindrical SS material (general structural rolled steel) tank is lined with rubber. etc. Moreover, the container 11 for collecting the coarse particles 65 may be, for example, a commercially available plastic bucket.

The area under the extraction pipe 30 is open to the atmosphere. By doing so, only the coarse particles 65 can be collected in the container 90 .

It is preferable that the height difference L of the extraction pipe 80 is 0.8 m or more in the vertical direction. By doing so, the slurry 60 can be sent smoothly without causing the slurry to overflow from the extraction pipe and without entrapping air in the slurry.

As described above, according to the coarse particle removing apparatus 200 according to another embodiment of the present invention, when removing coarse particles from a slurry containing coarse particles with a high solid component load, clogging does not occur and coarse particles can be collected. It is easy, and a coarse particle removing device with a simple device configuration can be obtained.

Although the embodiments and examples of the present invention have been described in detail as described above, it should be understood by those skilled in the art that many modifications are possible without substantially departing from the novel matters and effects of the present invention. , will be easily understood. Accordingly, all such modifications are intended to be included within the scope of the present invention.

For example, a term described at least once in the specification or drawings together with a different, broader or synonymous term can be replaced with the different term anywhere in the specification or drawings. Also, the configuration and operation of the strainer and coarse particle removing device are not limited to those described in each embodiment and each example of the present invention, and various modifications are possible.

10 straight pipe, 11 upper end flange, 12 lower end flange, 20 bypass pipe, 21 pipe branching obliquely downward from the straight pipe, 21b bottom surface of pipe branching obliquely downward, 22 upper bending portion of bypass pipe, 22b laterally branching Bottom of piping 30 Extraction pipe 40 First slit portion 50 Second slit portion 60 Slurry 65 Coarse particles 70 Wet pulverizer 75 Storage tank 80 Extraction pipe 90 Container for collecting coarse particles,
θ1 inclination of the first slit, θ2 angle of the pipe branching obliquely downward from the straight pipe, θ3 angle of the pipe joining the straight pipe obliquely, d1 interval between the straight pipe and the bypass pipe, d2 distance between the bypass pipe and the discharge pipe Interval, w1 Width of flat plate forming first slit portion, w2 Width of flat plate forming second slit portion, t1 Horizontal thickness of flat plate forming first slit portion, t2 Flat plate forming second slit portion thickness in the horizontal direction, s1 width of the first slit, s2 width of the second slit, L height difference of extraction pipe

Claims (6)

A strainer for removing coarse particles from a slurry,
a straight pipe having flanges at its upper and lower ends;
a bypass pipe in which a pipe branching obliquely downward from the straight pipe is arranged, and then a pipe descending in parallel with the straight pipe and obliquely joining the straight pipe is arranged;
a discharge pipe in an open-to-atmosphere state in which a pipe branching further laterally from the upper bent portion of the bypass pipe is arranged and then arranged downward,
Slits in the straight pipe that are parallel to the pipe branching obliquely downward, and that have an upper side on the same plane as the bottom surface of the pipe branching obliquely downward, and the width of each slit is 10 mm or more. a first slit portion;
A second slit in the bypass pipe that is parallel to the laterally branching pipe, has an upper side on the same plane as the bottom surface of the laterally branching pipe, and has a width of 10 mm or more. A strainer characterized by having a slit portion. 2. The strainer according to claim 1, wherein the bypass pipe branches obliquely downward from the straight pipe and has an angle of 30 to 45 degrees with respect to the straight pipe. 3. The strainer according to claim 1, wherein the width of the slits of the first slit portion and the second slit portion is 30 mm or less. The strainer according to any one of claims 1 to 3, wherein the flat plate forming the first slit portion and the second slit portion has a lateral thickness of 3 mm or more. A storage tank for temporarily storing the pulverized slurry overflowing from the wet pulverizer, a strainer for removing coarse particles from the slurry stored in the storage tank, and a container for collecting the coarse particles. A coarse particle removing device,
The strainer is
a straight pipe arranged vertically directly below the storage tank and having flanges at upper and lower ends;
a bypass pipe in which a pipe branching obliquely downward from the straight pipe is arranged, and then a pipe descending in parallel with the straight pipe and obliquely joining the straight pipe is arranged;
a discharge pipe in an open-to-atmosphere state in which a pipe branching further laterally from the upper bent portion of the bypass pipe is arranged and then arranged downward,
Slits in the straight pipe that are parallel to the pipe branching obliquely downward, and that have an upper side on the same plane as the bottom surface of the pipe branching obliquely downward, and the width of each slit is 10 mm or more. a first slit portion;
A second slit portion in the bypass pipe, which is a slit parallel to the horizontally branched pipe, has an upper side on the same plane as the bottom surface of the horizontally branched pipe, and has a width of 10 mm or more. has
A sampling pipe is connected to the lower end flange of the strainer,
An apparatus for removing coarse particles, wherein the container is disposed under the extraction pipe. 6. The coarse particle removing apparatus according to claim 5, wherein the height difference of the extraction pipe is 0.8 m or more in the vertical direction.

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