KR101974056B1 - A Liquid-solid Seperator with a Screen - Google Patents

Abstract

The present invention relates to a solid-liquid separator for discharging sludge contained in raw water in water treatment or sewage treatment More specifically, the present invention relates to a solid-liquid separator with a deflection perforated screen, in which raw water containing sludge is added and mixed with a weighted coagulant, the sludge is separated and discharged through a stirring device, the sludge moves into a cyclone part comprising an outer cylinder part including an outer barrel part, an outer cone shape part and a lower discharge pipe part, and an inner cylinder part including an inner barrel part, a cone-shaped deflection perforated screen part and an upper discharge pipe, the sludge rotates between the inner and outer barrel parts at the upper side to collide strongly, and the sludge and the weighted coagulant are separated. The weighted coagulant is discharged through the lower discharge pipe part to be stored, and at the same time, the water and sludge are discharged to the upper discharge pipe through the deflection perforated screen part. Therefore, the weighted coagulant can be efficiently separated from the sludge to be reused.

Description

A Liquid-solid Seperator with a Screen

The present invention relates to a solid-liquid separator for discharging sludge contained in raw water in water treatment or sewage treatment, and more specifically, by adding a weighted flocculant to raw water containing sludge and mixing the same, followed by separation through a stirring device. The sludge discharged is introduced into the cyclone part which consists of an outer cylinder part which consists of an outer barrel part, an outer cone shape part, and a lower discharge pipe part, and an inner barrel part which consists of an inner barrel part, a cone-shaped deflection perforation screen part, and an upper discharge pipe, The sludge rotates strongly between the barrels so that the sludge and the weighted coagulant are separated and discharged and stored through the lower discharge pipe, and the water and sludge are discharged to the upper discharge pipe through the deflection perforated screen to efficiently discharge the weighted coagulant in the sludge. So that they can be reused Relates to a perforated screen is deflected coupling the solid-liquid separation device.

Generally, floc is agglomerates formed when a coagulant is mixed with water, and a state in which solid particles are dispersed in a liquid is called a suspension or suspension. Agglomerates) to form larger solids visible to the naked eye are called flocs.

Therefore, in the Conventional water treatment process for water supply, a coagulant is administered in a rapid mixing tank to finely flocculate colloidal microparticles, microorganisms, dissolved organic and inorganic substances, In floculation basin, floc grows large so that it can be easily removed by sedimentation or dissolved air flotation by gravity.

In the sewage water treatment process, the suspended solids (Suspended Solid, SS) are first precipitated to facilitate subsequent biological treatment or finally to precipitate and remove high concentration of microbial flocs after biological treatment. In order to lower the phosphorus (Phosphorus) in the sewage water to ultra low concentration, as in the standard water purification process, a coagulant is administered to granulate the dissolved phosphorus into a precipitate and then remove sedimentation or perform filtration. In addition, in the advanced treatment process for reuse of sewage water treatment, biologically treated sewage effluent is additionally filtered or administered with flocculant, flocculation, precipitation, and filtration to achieve treatment target water quality.

Thus, in order to maximize sedimentation efficiency, it is important to form a large floc through a weighted flocculant to maximize the sedimentation efficiency.

The technical analysis for water treatment and sewage treatment, which is conventionally implemented, is as follows.

Veolia's technology uses microsand as a weighted coagulant and installs a cylindrical coagulation tank to improve the formation rate of the flocs, but there is a problem that the reuse rate of the microsand decreases and the pump and pipes are worn by the microsand.

Degremont's technology can reduce operating costs by recycling sludge by using the sludge return sludge as a weighted coagulant, but there are difficulties in optimizing coagulant aid and injection volume.

Westech's technology uses microsands as a weighted coagulant, has a short preparation time for operation, and uses two flocculation tanks, but suffers from abrasion of the microsands' pumps and piping.

Evoqua's technology uses magnetite as a weighted coagulant and improves the efficiency of weighted coagulant reuse by using magnetism, but has a problem that the size of the weighted coagulant particles available for mixing by a mixer is limited.

As such, a device applying various technologies is known in the art, but since they have to be equipped with various reaction tank settling tanks for discharging sludge contained in raw water, a large installation space is required, and the installation cost is increased due to the size of the equipment itself. However, there is a problem that excessive operating costs.

In addition, since a dedicated weighted flocculant must be used for each device, there is a problem that the selection range of the flocculant is considerably limited.

In addition, in the conventional apparatus, there is a problem in that the weighted coagulant requires a lot of costs due to the efficiency of separating and reusing the weighted coagulant from the sludge.

KR 10-1773470 (registration number) 2017.08.31. KR 10-1032318 (registration number) 2011.04.25. KR 10-1353751 (registration number) 2014.01.14.

Accordingly, the present invention has been made to solve the conventional problems as described above,

Sludge is added to the sludge containing raw water, mixed with the weighted flocculant, and then separated and discharged through a stirring device. An outer barrel portion, an inner barrel portion, and a cone-shaped deflection perforated screen portion formed of an outer barrel portion, an outer cone shape portion, and a lower discharge tube portion; It flows into the cyclone part consisting of the inner discharge part formed by the upper discharge pipe, and the sludge is strongly collided as the sludge is rotated between the inner and outer barrel parts of the upper side to separate the sludge and the weighted coagulant and discharge and store it through the lower discharge pipe part, It is an object of the present invention to provide a solid-liquid separation device in which a deflection perforated screen is combined to efficiently discharge the weighted coagulant from the sludge by discharging it to the upper discharge pipe through the deflection perforated screen part.

Another object of the present invention is to form a projection in a streamlined portion of the perforation screen portion of the deflection perforated screen provided on the lower end of the inner cylinder portion of the cyclone portion is installed to be inclined in the direction of the water flow (clockwise) to quickly rotate water and weighted coagulant and sludge, etc. While preventing the clogging of the weighted coagulant particles in the perforation is to improve the separation efficiency of the flocculant.

Another object of the present invention is to be applicable to any weighted coagulant, so that it can be applied regardless of the nature or type of weighted coagulant.

Another object of the present invention is to increase the cleaning efficiency and prevent the blockage of the perforation to improve durability by allowing the weighted coagulant fixed to the deflection perforated screen part provided at the lower end of the inner cylinder part of the cyclone to increase the cleaning efficiency.

In order to achieve the above object, the present invention provides a hollow outer barrel portion 111 into which the sludge aggregated by the weighted flocculant and raw water are introduced into the raw water supply passage portion 101, and a lower end portion of the outer barrel portion 111. It is installed in communication with the hollow outer cone portion 112, the diameter of the hollow from the upper side to the lower side toward the lower side, and the lower discharge pipe 113 is installed in communication with the lower end of the outer cone shape portion 112 discharged weighted flocculant and sludge Outer cylinder part 110 which becomes; A hollow inner barrel portion 121 opposed to the outer barrel portion 111 and installed therein and in communication with a lower end portion of the inner barrel portion 121 are installed in communication with a lower end of the inner barrel portion 121 and have a smaller diameter from the upper side to the lower side. And an inner cylinder portion 120 including a perforated screen portion 123 in which a plurality of fluid through holes 123h into which sludge and raw water are introduced are formed, wherein the perforated screen portion 123 has an upper surface thereof. Communicating in communication with the 121 and the bottom surface is formed as a sharp tip, the body portion 123a of the perforated screen portion 123 and the deflecting projection 124 protruding inclined clockwise along the flow direction of the inflow, and the The fluid through-hole 123h is formed between the deflecting protrusions 124 at the rear end of the deflecting protrusion 124 without being directly exposed to the inflowing water in the flow direction of the inflowing water, and the sludge passes therethrough, and the perforated screen portion 123 of the Down The lower end of the perforated screen portion 123 is closed to prevent the sludge and raw water coming down to the lower end.

In addition, a plurality of inner protrusions 111a are randomly formed on the inner wall surface of the outer barrel portion 111 of the present invention, and a plurality of outer protrusions 121a are formed on the outer wall surface of the inner barrel portion 121 at random.

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In addition, the deflection protrusion 124 of the present invention is formed such that the distance (d) with the body portion 123a is gradually increased toward the end portion from the body portion 123a of the punching screen portion 123.

In addition, the size (a) of the fluid through-hole (123h) of the present invention is provided to be formed smaller than the size (b) of the particle (P) of the weighted coagulant.

In addition, the deflection protrusion 124 of the present invention is provided with its outer end formed in a round shape.

In addition, the perforated screen unit 123 provided at the lower end of the inner cylinder portion 120 of the present invention is connected to the ultrasonic device 140 for providing a vibration.

The solid-liquid separation device combined with a deflection perforation screen according to the present invention adds and blends a weighted coagulant to the sludge-containing raw water and supplies the sludge separated and discharged through the stirring device to be rotated between the inner and outer barrel portions of the upper side of the cyclone part. By crushing, the weighted coagulant stuck in the sludge is quickly separated and precipitated down into the lower discharge pipe part, and the water and sludge are discharged to the upper discharge pipe through the deflection perforated screen part to efficiently separate the weighted coagulant from the sludge. There is an advantage that can be reused.

In addition, the present invention forms a streamlined projection in the perforation portion of the deflection perforated screen portion provided in the lower portion of the inner cylinder portion of the cyclone portion is installed inclined in the direction of the water flow (clockwise), and the water and weighted coagulant and sludge are rotated quickly and perforated The particles of the weighted coagulant are prevented from clogging, thereby improving the separation efficiency of the flocculant.

In addition, the present invention has the effect that can be applied to all devices to be applicable regardless of the nature or type of weighted coagulant.

In addition, the present invention allows to separate the weighted coagulant fixed to the deflection perforated screen unit provided in the lower portion of the inner cylinder portion of the cyclone unit by using ultrasonic waves to increase the cleaning efficiency and to prevent the perforation is blocked, thereby improving durability.

1 is a perspective view of the solid-liquid separation device is coupled to the deflection punching screen according to the present invention,
Figure 2 is an internal perspective perspective view of the solid-liquid separation device is coupled to the deflection perforation screen according to the present invention,
Figure 3 is an exploded perspective view of the solid-liquid separation device combined with a deflection perforation screen according to the present invention,
Figure 4 is a perspective view of the main portion separation for the solid-liquid separation device is coupled to the deflection puncture screen according to the present invention,
Figure 5 is an enlarged view of the main portion provided in the deflection punching screen provided in the solid-liquid separation apparatus combined with the deflection punching screen according to the present invention,
Figure 6 is a schematic planar state diagram in which raw water flows into the brake section to the solid-liquid separation device coupled to the deflection perforation screen according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described to be easily carried out by those of ordinary skill in the art.

The solid-liquid separator 100 coupled to the deflection perforation screen according to the present invention is shown in Figures 1 to 5,

Hollow outer barrel portion 111, which is installed in communication with the circumferential direction so that the sludge (microorganism) and raw water (inflow water) aggregated by the weighted flocculant is rotated inflow, and the outer barrel portion ( 111 is in communication with the lower end of the hollow outer cone-shaped portion 112, the diameter is reduced from the upper side to the lower side, and the lower discharge pipe is installed in communication with the lower end of the outer cone-shaped portion 112 to discharge the weighted coagulant An outer cylinder 110 composed of 113;

A hollow inner barrel portion 121 opposed to the outer barrel portion 111 and installed therein; an upper discharge pipe 122 communicating with an upper surface of the inner barrel portion 121 to discharge water or microorganisms; and It is installed in communication with the lower end portion of the inner barrel portion 121 and is made of a punching screen portion 123 is formed in a plurality of fluid through-holes (123h) through which the diameter of the smaller from the upper side to the lower side into a cone-shaped hollow and fluid flows in and out Consists of a cyclone unit including;

The perforated screen portion 123 is coupled to the upper surface is in communication with the inner barrel portion 121 and the bottom surface is formed of a sharp peak while forming a closed portion.

The present invention constituted as described above, the sludge (microorganism) and the raw water aggregated by the weighted flocculant is introduced into the outer side along the circumferential direction of the outer barrel portion 111 through the raw water supply passage 101, the outer side Rotating while rotating the inside of the barrel 111, water or sludge (microorganisms) having a small specific gravity rises through the interior of the punching screen 123 through the fluid through-hole (123h) is discharged through the upper discharge pipe Is processed. At the same time, the weighted coagulant introduced into the outer barrel portion 111 is lowered while rotating along the inner outer surface of the outer barrel portion 111 and the outer cone shape portion 112 with a large specific gravity and then the lower discharge pipe 113. Discharged along and stored in the storage tank 130 provided at its end. The present invention is to quickly and easily separate the pure water and sludge contained in the raw water through the above procedure.

Water or sewage water is aggregated by adding various weighted flocculants such as activated carbon, microsand, magnetite and settling the sludge. Therefore, the weighted coagulant is tightly coupled to the settled sludge, and the sludge and the weighted coagulant are not separated even though the sludge passes through the general cyclone, and the weighted coagulant remains in the sludge even after the water is removed through the cyclone. Therefore, if the sludge is disposed of as it is, the new weighted coagulant is continuously added, and thus operating costs are high.

The present invention is to compose a new solid-liquid separator formed by a cyclone to force the weighted coagulant from the sludge introduced into the raw water to be forcibly separated, weighted by separating the weighted coagulant firmly bonded to the sludge (recycling) The efficiency of the flocculant was dramatically increased.

To this end, a plurality of inner protrusions 111a are randomly formed on the inner wall surface of the outer barrel portion 111 of the present invention, and a plurality of outer protrusions 121a are formed on the outer wall surface of the inner barrel portion 121 at random. It was. The inner and outer protrusions are sufficient if they are not smooth at the barrel, irrespective of a cylinder, a polygon, or the like.

Therefore, when the sludge (microorganism) and raw water mixed by the weighted coagulant are mixed (inflow water) and flowed through the raw water supply passage 101, the inflow water is the outer barrel portion 111 and the inner barrel portion 121 as shown in FIG. The inner protrusion 111a and the outer protrusion 121a strongly collide with each other while rotating between them. At this time, the sludge contained in the influent water collides strongly with the inner protrusion 111a and the outer protrusion 121a randomly, and the weighted coagulant and the sludge are separated by the impact force.

As such, the sludge and the weighted coagulant are separated by colliding with the inner protrusion 111a and the outer protrusion 121a while rotating between the outer barrel portion 111 and the inner barrel portion 121. Along the upper 112 and the perforated screen portion 123 is lowered. Subsequently, water and sludge (microorganisms) having a small specific gravity flow in and rise through the fluid through hole 123h formed in the punching screen part 123 while rotating around the punching screen part 123 to pass through the inner barrel part 121. The weighted flocculant discharged through the upper discharge pipe 122 and the sludge is separated and discharged along the lower discharge pipe 113 while being continuously lowered and stored in the storage tank 130. This is done by the principle of the cyclone which flows the fluid into the body to rotate and the body is configured in the shape of a cone.

In this process, the particles of the weighted coagulant separated between the outer barrel portion 111 and the inner barrel portion 121 block the fluid through hole 123h formed in the perforated screen portion 123 to suppress the inflow of sludge and water. Can be.

Accordingly, the present invention is configured to prevent the clogging phenomenon of the fluid through-hole (123h) as described above. That is, as shown in Figure 5, the body portion 123a of the punching screen portion 123 in the clockwise direction along the flow direction of the raw water so that the fluid through hole (123h) is not directly exposed to the inflow (raw water) A deflection protrusion 124 protruding obliquely is formed.

The deflecting protrusion 124 is formed such that the distance d from the body portion 123a toward the end portion from the body portion 123a of the punching screen portion 123 becomes farther away, and the fluid through hole 123h is After passing through the deflecting protrusion 124 while rotating according to the direction in which the weighted coagulant is moved, not directly exposed to the flowing raw water, it may be introduced into the fluid through the change in the opposite direction. As described above, the deflecting protrusion 124 is not simply protruded from the punching screen part 123, but is protruded in a clockwise direction, and the fluid through-hole 123h into which the raw water flows is located at the rear end of the deflecting protrusion. In order to enter the fluid through hole 123h and move to the upper discharge pipe 122, such as water, the direction of movement must be abruptly changed after passing through the deflecting protrusion 124 according to the moving direction. Since the raw water introduced into the raw water supply passage 101 is very fast, the direction of the raw water suddenly changes after passing through the deflecting protrusion 124.

Therefore, since the rotating weighted coagulant is less likely to enter the fluid through the change direction after the deflecting protrusion 124, only the very small water and sludge (microorganism) flows into the upper discharge pipe 122.

Water and sludge that is rapidly rotated along the body portion 123a of the perforated screen portion 123 through this configuration is introduced into the through the fluid through hole 123h and then rises, but the sludge is weighted separated. The flocculant does not flow into the fluid passage and continues to rotate and descend to the bottom.

In addition, the present invention is provided with a fluid through-hole (123h) spacing (a) is formed smaller than the diameter (b) of the particles (P) of the weighted coagulant. Therefore, the particles of the weighted coagulant separated from the sludge can be prevented from entering between the deflecting protrusion and the deflecting protrusion to block the fluid through hole 123h. Even though the particles of the weighted coagulant are fixed by being caught in the middle of the end of the deflecting protrusion and another deflecting protrusion successive, the particles of the latent weighted coagulant flowing in from behind collide to remove the fixed weighted coagulant particles.

This prevents the fluid through hole 123h formed in the perforated screen portion 123 from being blocked by the particles of the weighted coagulant and separates only the water and the microorganism, so that the weighted coagulant is discharged to the upper discharge pipe 122. The probability is very low. Since the weight of the weighted coagulant varies depending on the type, the spacing between the deflecting protrusions is determined by the type of weighted coagulant used.

In addition, the outer shape of the deflecting protrusion 124 is formed to facilitate the flow of fluid by rounding the outer end collided with the raw water and the weighted coagulant as shown in FIG.

Next, the perforated screen portion 123 closed by forming a sharp peak in order to more completely separate the weighted flocculant, water and sludge. All the existing cyclones are open at the lower end when the influent component is separated, thereby becoming a movement path for the small specific gravity component. The open lower end may not be completely separated in a mixed state and components with a large specific gravity may escape together.

In order to solve this problem, the present invention has a lower end of the perforated screen portion 123 into which the separated water flows into a pointed peak and is closed without opening the peak.

According to the present invention, the tip of the perforated screen part 123 is pointed to prevent the weighted coagulant from moving together when the water and the sludge have a low specific gravity due to rotation, and a material having a high specific gravity such as a weighted coagulant is introduced by blocking the last tip. There is no funnel to be.

The present invention is discharged to the upper discharge pipe 122 only through the fluid through hole (123h) located on the rear of the deflected through hole inclined in the clockwise direction of the punching screen portion (123). According to the present invention showed a weighted coagulant recovery efficiency of more than 90% by the above experiment.

On the other hand, the perforated screen portion 123 provided at the lower end of the inner cylinder portion 120 of the present invention is connected to the ultrasonic device 140 to prevent the fluid through hole (123h) is blocked.

 In the present invention, since the space of the fluid through-hole 123h is smaller than the particle diameter of the weighted coagulant, the fluid through-hole 123h is hardly blocked, but the weighted coagulant may be fixed between the deflecting protrusion and the connected deflecting protrusion. In this case, the fixed weighted coagulant may not be separated even by the weighted coagulant subsequently introduced. In this case, the weighted coagulant may be separated by providing vibration through the ultrasonic apparatus 140.

Therefore, by applying an ultrasonic wave to the perforated screen unit 123 to further prevent the fluid through hole (123h) to be blocked to further improve the separation efficiency.

The solid-liquid separator 100 coupled to the deflection perforated screen of the present invention configured as described above has the inner barrel portion 111 and the outer barrel portion 121a on which the inner protrusion 111a is formed. 121 is provided and the raw water flowing in strongly collides with the inner protrusion 111a and the outer protrusion 121a and the area where the sludge is broken (this is referred to as 'break section A'), and the outer cone shape portion 112. And the perforated screen part 123 is provided to separate the sludge and the weighted coagulant through the brake section and the water and the sludge to the center where the weighted coagulant is divided into the side part (this is called 'separation section B'), and The lower discharge pipe 113 and the storage tank 130 is provided and divided into a region for collecting and storing the weighted coagulant in the separation section (this is called 'collector section C').

Therefore, when the raw water containing sludge penetrating the weighted coagulant is supplied to the raw water supply passage 101, the sludge contained in the raw water is crushed in the brake section and then separated in the separation section while the water and microorganisms are separated from the perforated screen portion. Inward through the fluid through hole (123h) of the 123 is discharged through the upper discharge pipe 122 and the weighted coagulant is lowered along the inner wall surface of the outer cone portion 112 to the lower portion of the collector section It is stored in the storage tank 130 through the discharge pipe 113. At this time, some sludge and water is introduced into the storage tank 130.

Here, the weighted coagulant collected and stored in the collector section is utilized by re-feeding back into the raw water, and sludge is discharged.

Therefore, the weighted flocculant used in the present invention is separated from the sludge while passing through the brake section and the separation section, so that any type of activated carbon, magnetite or micro sand may be used. In this case, a perforated screen unit corresponding to each weighted coagulant may be installed and used. That is, the size of the fluid through-holes formed in the perforated screen is different depending on the particle size of the weighted coagulant.

As described above, the present invention can quickly and efficiently separate and reuse the weighted coagulant in the sludge, and its reuse rate is very high, thereby significantly reducing the operating cost.

Reference numeral 150 is a support that supports the perforated screen unit 123 therein to facilitate installation thereof.

As described above, the solid-liquid separator combined with the deflection perforation screen according to the present invention is mixed with the weighted flocculant to the sludge-containing raw water and then separated and discharged through the stirring device, the outer barrel portion and the outer cone shape and the lower portion. It flows into the cyclone part which consists of the outer cylinder part formed by the discharge pipe part, the inner barrel part, the cone-shaped deflection perforation screen part, and the inner cylinder part formed by the upper discharge pipe, and the sludge is strongly collided as the sludge rotates between the inner and outer barrel parts of the upper side, and the sludge and the weighted coagulant are By separating and storing the discharge through the lower discharge pipe portion and at the same time to discharge the water and sludge discharged to the upper discharge pipe through the deflection perforated screen can be efficiently separated and reused in the sludge.

100: solid-liquid separator with deflection punched screen
101: raw water supply passage
110: outer part
111: outer barrel portion 111a: inner projection 112: outer cone shape 113: lower discharge pipe
120: inner tube
121: inner barrel portion 121a: outer projection 122: upper discharge pipe 123: perforated screen portion
123a: body portion 123h: fluid through hole 124: deflection protrusion
130: storage tank
140: ultrasonic device
150: support
a: fluid through hole size b: weighted coagulant particle size d: separation distance

Claims (7)

The hollow outer barrel portion 111 into which the sludge aggregated by the weighted flocculant and the raw water are introduced into the raw water supply passage portion 101 and the lower outer portion of the outer barrel portion 111 are installed in communication with each other. A hollow outer cone portion 112 that is smaller in diameter toward the side, and an outer cylinder portion 110 which is installed in communication with a lower end of the outer cone portion 112 to be a lower discharge pipe 113 through which weighted coagulant and sludge are discharged;
A hollow inner barrel portion 121 opposed to the outer barrel portion 111 and installed therein and in communication with a lower end portion of the inner barrel portion 121 are installed in communication with a lower end of the inner barrel portion 121 and have a smaller diameter from the upper side to the lower side. And an inner cylinder portion 120 including a perforated screen portion 123 in which a plurality of fluid through holes 123h into which sludge and raw water are introduced are formed.
The perforated screen portion 123 is coupled to the upper surface is in communication with the inner barrel portion 121, the bottom surface is formed with a sharp tip, the body portion 123a of the perforated screen portion 123 in the flow direction of the inflow water A fluid through which sludge passes through the deflecting protrusion 124 protruding obliquely in the clockwise direction and the deflecting protrusion 124 at the rear end of the deflecting protrusion 124 without being directly exposed to the inflowing water in the flow direction of the inflowing water. 123h is formed,
Sludge lowered to the lower portion of the punching screen portion 123 and the solid-liquid separation device is coupled to the deflection punching screen closed the lower end of the punching screen portion 123 so that raw water does not flow into the lower portion.
The method of claim 1,
A plurality of inner projections 111a are randomly formed on the inner wall surface of the outer barrel portion 111, and a deflection perforated screen in which a plurality of outer projections 121a are formed on the outer wall surface of the inner barrel portion 121 is combined at random. Solid-liquid separator.
delete The method of claim 1,
The deflection projection 124 is a solid-liquid separation combined with a deflection perforated screen formed so that the distance (d) with the body portion 123a is gradually increased from the body portion (123a) of the perforated screen portion 123 to the end Device.
The method of claim 1,
The size (a) of the fluid through hole (123h) is a solid-liquid separation device is combined with a deflection perforated screen is formed smaller than the size (b) of the weight (P) of the coagulant.
The method of claim 4, wherein
The deflection projection 124 is a solid-liquid separation device is coupled to the deflection punching screen is provided with its outer end formed in a round shape.
The method of claim 1,
The perforated screen unit 123 is provided in the lower portion of the inner cylinder portion 120 is a solid-liquid separation device is coupled to the deflection perforated screen is connected to the ultrasonic device for providing vibration 140 is installed.

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