KR101961299B1 - A Multistage hydro-cyclone for rapid collection of weighted coagulation additives from mixed sludge - Google Patents

Abstract

The present invention relates to a hydrocyclone for discharging sludge contained in raw water when treating water or wastewater, and more specifically, to a multi-stage hydrocyclone for a weighted coagulative rapid collection amount, which separates each of a weighted coagulant, sludge and water from raw water containing the sludge into which the weighted coagulant infiltrates, to a lower side and an upper side through a plurality of auxiliary cyclones, and allows each of the weighted coagulant which is separated through the lower side of the auxiliary cyclones and the water and sludge which have not moved to the upper side to flow into a main cyclone again such that the sludge and the water are discharged through an upper side of the main cyclone while the weighted coagulant is discharged through a lower side of the main cyclone and stored. Therefore, the sludge, the water, and the weighted coagulant are rapidly and efficiently separated and discharged to increase a separation and recycling rate of the weighted coagulant, thereby specifically reducing treatment costs of sludge.

Description

[0001] The present invention relates to a multistage hydrocyclone,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydrocyclone for discharging sludge contained in raw water in a water treatment or a wastewater treatment, and more particularly, to a hydrocyclone for treating sludge contained in raw water through a plurality of auxiliary cyclones, And the water is separated into the lower side and the upper side respectively, and the weighted flocculant separated through the plurality of auxiliary cyclones and the water and the sludge which have not migrated to the upper side are re-introduced into the main cyclone again, , And the weighted coagulant is discharged through the lower side of the main cycle, thereby quickly and efficiently separating and discharging the sludge and water and the weighted coagulant, and increasing the separation and recycling rate of the weighted coagulant to drastically reduce the sludge treatment cost Weighted cohesive high-speed recovery multistage hydro- It is about eclon.

In general, floc is an aggregate formed when water is mixed with a flocculant. A state in which solid particles are dispersed in a liquid is called a suspension or a suspension. The solid particles in this state are collected by a flocculant and adhered Flocculation), which results in a larger solid that can be seen with the naked eye.

Therefore, in the conventional water treatment process for supplying water, micro-flocation of colloidal fine particles, microorganisms, dissolved organic and inorganic substances and the like is carried out by using a coagulant in a rapid mixing tank, Floc is greatly grown to facilitate removal by gravity sedimentation or dissolved air flotation at the flocculation basin.

In addition, in the wastewater treatment process, suspended sediment (Suspended Solid, SS) is removed by primary sedimentation to facilitate subsequent biological treatment or ultimate precipitation removal of highly concentrated microbial flocs after biological treatment. In order to lower phosphorus in wastewater to ultra low concentration, sedimentation is removed or filtration is performed after the dissolved phosphorus is granulated into precipitate by administering coagulant as in standard water purification process. Further, in the advanced treatment process for reuse of wastewater treatment water, biologically treated wastewater discharge water is further filtered or coagulant is added, and floc formation, sedimentation and filtration are performed to achieve the target water quality of treatment.

In order to maximize the sedimentation efficiency, it is important that the water treatment or the wastewater treatment is formed into a large floc through the weighted coagulant to the fine particles contained in the water to be treated.

The conventional techniques for water treatment and wastewater treatment are as follows.

Veolia's technology improves the rate of formation of the floc by using microsludge as a weighted coagulant and installing a cylindrical coagulation bath, but it has a problem that the reusability of the microsens is lowered and the pump and piping caused by the microsens is worn.

Degremont's technology can reduce operating costs by using sludge recycle by using sludge from a settling tank as a weighted coagulant, but it is difficult to optimize the amount of coagulant and dosage.

Westech's technology uses micro-sand as a weighted coagulant, has a short run preparation time and uses two coagulation tanks but suffers from wear of microsend pumps and piping.

Evoqua's technology uses magnetite as a weighted coagulant and improves the efficiency of weighted coagulant reuse by using magnetism, but there is a problem that the size of the weighted coagulant particles that can be used by mixing with a mixer is limited.

As such, conventionally known apparatuses have been known to apply various techniques, but they are required to have installation such as various reaction tank settlers for discharging sludge contained in raw water, so that a large installation space is required, Or the operation cost is excessive.

Further, since a dedicated weighted flocculant is used for each device, there is a problem that the selection width of the flocculant is considerably limited.

Also, in the conventional apparatus, there is a problem in that the efficiency of separating and reusing the weighted flocculant from the sludge is low and the cost of the weighted flocculant is high.

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

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

The raw water containing the sludge having the weighted flocculant impregnated therein is separated into the lower side and the upper side of the weighted flocculant, the sludge and the water through the plurality of auxiliary cyclones, the weighted flocculant separated through the plurality of auxiliary cyclones, The sludge and water are discharged through the upper side of the main cycle and the weighted flocculant is discharged and stored through the lower side of the main cycle so that the sludge and the water and the weighted flocculant are rapidly discharged The present invention also provides a weighted multi-stage hydrocyclone which is capable of rapidly separating and recycling the weighted coagulant, thereby achieving a weighted cohesive and high-recovery multi-stage hydrocyclone.

Another object of the present invention is to rapidly and rapidly separate the weighted flocculant that has penetrated into the sludge through the multi-stage auxiliary cyclone and the main cyclone.

Another object of the present invention is to further improve the selective collection efficiency of the weighted flocculant by providing the weighted flocculant separated through the multi-stage auxiliary cyclone to the main cyclone to separate the sludge and water contained therein .

Another object of the present invention is to make it possible to apply all weighted coagulants to general use by making it possible to apply them regardless of the characteristics or kinds of the weighted flocculant.

Another object of the present invention is to provide a method of separating a weighted flocculant fixed on a perforated screen unit provided in a sub-cyclone and a main cyclone by using ultrasonic waves, thereby improving cleaning efficiency and preventing clogging of perforations to improve durability have.

It is another object of the present invention to provide a method of separating a weighted flocculant from a main cyclone having a multi-stage auxiliary cyclone and a main cyclone and having a high rotation speed and high water and sludge, The present invention is directed to simplifying the apparatus so that the weighted flocculant and the sludge can be quickly separated from each other by making the shape of the perforated screen different.

In order to achieve the above object, according to the present invention, an inflow water mixed with sludge and raw water flocculated by a weighted flocculant is introduced into the inside, and the weighted flocculant, sludge and water are separated into a perforated screen part 123, A plurality of auxiliary cyclones 100 separated and ejected to the lower side of the weighted flocculant; The weighted flocculant discharged from the lower end of the auxiliary cyclone 100 and the sludge and water contained in the flocculated flocculant are connected to the main perforated screen portion The main cyclone 200 injects the inflow water into the main cyclone 200. The main cyclone 200 injects the inflow water into the main cyclone 200 through the main cyclone 200, The piercing screen unit 123 and the main piercing screen unit 221 which are faster than the rotating speed of the inflow water and allow water and sludge to pass through the auxiliary cyclone 100 and the main cyclone 200 are different from each other .

In addition, the perforated screen unit 123 for passing the water and the sludge of the auxiliary cyclone 100 of the present invention has a conical shape formed with a sharp peak at the lower surface thereof and passes through water and sludge of the main cyclone 200 The main perforated screen unit 221 is formed to be wider and rounded than the perforated screen unit 123.

The auxiliary cyclone 100 of the present invention is characterized in that the inflow water mixed with the raw water and the sludge agglomerated by the weighted flocculant enters the inner wall surface of the hollow outer cylinder portion 111 into which the raw water supply passage portion 101 flows, A plurality of protrusions are formed on the outer wall surface of the hollow inner barrel 121 which is opposed to the inner wall 111 of the main cyclone 100. The main cyclone 200 is provided with a weighted flocculant introduced from the auxiliary cyclone 100, The inner wall surface of the main outer tube 210 into which the sludge flows and the outer wall surface of the main inner tube 220 corresponding to the main outer tube 210 do not have protrusions.

In addition, in the auxiliary cyclone 100 of the present invention, the deflection protrusions 124 are inclined at the front end of the fluid through-hole 123h in the direction in which the inflow water is rotated.

The diameter of the perforated screen portion 123 of the auxiliary cyclone 100 of the present invention is smaller than the diameter of the main perforated screen portion 221 of the main cyclone 200.

The auxiliary cyclone 100 of the present invention is constituted by a plurality of multi-stages connected to the outer circumference of the main cyclone 200 at regular intervals.

The weighted cohesive fast-recovery multistage hydrocyclone according to the present invention re-inflows the weighted flocculant separated through the lower side of the plurality of auxiliary cyclones into the main cyclone again so that the sludge (microorganism) And the weighted flocculant is discharged and stored through the lower side of the main cycle, thereby rapidly and efficiently separating and discharging the sludge, the water and the weighted flocculant, thereby remarkably improving the separation and recycling rate of the weighted flocculant.

Further, the present invention can rapidly and rapidly separate the weighted flocculant penetrated into the sludge through the multi-stage auxiliary cyclone and the main cyclone.

In addition, the present invention provides the weighted flocculant separated through the multi-stage auxiliary cyclone again to the main cyclone and separates the flocculant from the main cyclone, thereby remarkably improving the selective collection efficiency of the flocculant.

In addition, the present invention is applicable to any weighted coagulant regardless of the nature or type of the weighted coagulant.

Further, the present invention can separate the weighted coagulant fixed to the perforated screen unit provided in the auxiliary cyclone and the main cyclone by using ultrasonic waves, thereby improving the cleaning efficiency and preventing the clogging of the perforations, thereby improving the durability.

The present invention also relates to a multi-stage (multi-stage) auxiliary cyclone and a main cyclone, wherein the auxiliary cyclone has a high rotation speed and a large amount of water and sludge, a perforation separating the weighted flocculant in the main cyclone, The shape of the screen can be changed to quickly separate the weighted flocculant and the sludge, and it is also possible to simplify the apparatus so that it is resistant to breakdown and easy to repair.

1 is a schematic diagram of a weighted cohesive fast recovery multistage hydrocyclone according to the present invention,
2 is a plan view of a weighted cohesive fast recovery multistage hydrocyclone according to the present invention,
3 is a perspective view of an auxiliary cyclone provided in a weighted cohesive fast recovery multistage hydrocyclone according to the present invention,
FIG. 4 is an internal state diagram of an auxiliary cyclone provided in a weighted cohesive fast recovery multistage hydrocyclone according to the present invention,
FIG. 5 is a cross-sectional view of a main part of a weighted cohesive fast recovery multistage hydrocyclone according to the present invention,
6 is a detailed view of a perforated screen portion of a secondary cyclone provided in a weighted cohesive fast recovery multistage hydrocyclone according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The weighted cohesive fast withdrawal multistage hydrocyclone 300 according to the present invention, as shown in Figures 1 to 6,

The water and the sludge are separated into the upper side and the weighted flocculant is separated and discharged to the lower side, while the inflow water mixed with the sludge and raw water mixed by the weighted flocculant flows into the interior along the circumferential direction, (100);

The weighted flocculant discharged from the lower end of the auxiliary cyclone 100 and the water and the sludge that can not reach the upper side of the auxiliary cyclone 100 are connected to each other so that the sludge contained in the flocculated flocculant and water are separated and discharged to the upper side And a main cyclone 200 in which the weighted flocculant is discharged and stored to the lower side,

The auxiliary cyclone (100)

A hollow outer cylinder portion 111 in which inflow water mixed with sludge (microorganism) and raw water flocculated by the weighted flocculant flows into the raw water supply passage portion 101 and a lower outer cylinder portion 111 communicating with the lower end portion of the outer cylinder portion 111, And a lower discharge pipe (113) communicating with a lower end of the outer conical top (112) and discharging a weighted coagulant, wherein the outer conical top (112) has a smaller diameter toward the lower side;

A hollow inner cylinder portion 121 which is opposed to the outer cylinder portion 111 and installed in the inner cylinder portion 121 and an upper discharge pipe 122 which communicates with the upper face of the inner cylinder portion 121 and discharges water or sludge And a plurality of fluid through holes 123h which are communicated with the lower end of the inner barrel 121 and whose diameter becomes smaller toward the lower side from the upper side to the hollow shape of the cone shape and into which the sludge and raw water are introduced, And an inner tube (120) composed of the inner tube (123)

In the main cyclone 200,

A main outer cylinder portion 211 communicating with the lower discharge pipe 113 of the outer cylinder portion 110 and a lower hollow portion 211 communicating with a lower end portion of the main outer cylinder portion 211 and having a smaller diameter from the upper side to the lower side, A main outer tube portion 210 having a main outer cone portion 212 and a main lower discharge tube 213 communicating with a lower end portion of the main outer cone portion 212 to discharge a weighted coagulant;

A main inner cylinder 225 opposed to the main outer cylinder 210 and having sludge and raw water introduced thereinto; a plurality of main through holes 221h connected to a lower portion of the main inner cylinder 210; And a main upper discharge pipe 222 communicating with an upper surface of the main inner barrel portion 225 and discharging water or sludge. .

The upper end of the perforated screen 123 is connected to the inner barrel 121 and the lower end of the perforated screen 123 is formed as a pointed end to form a closed part. The main perforated screen 221 has a plurality of The main through hole 221h is provided and the lower surface is formed as a confinement portion with a wide round surface.

That is, in the upper cyclone 100, a perforated screen 123 for separating (filtering) water and sludge and a weighted flocculant, and a water separator for separating water and sludge from the flocculant in the lower cyclone 200 The shape of the main perforated screen portion 221 is different. Because of this difference, the present invention can provide an optimal separation screen depending on the rate of incoming influent water and the ratio of different water and sludge in the influent.

The shape of the inner side surface of the outer barrel portion 111 and the inner side barrel portion 211 of the auxiliary cyclone 100 and the inner side surface of the inner barrel portion 121 and the main inner side of the main cyclone 200 of the auxiliary cyclone 100, The shape of the lens barrel 225 (the presence or absence of the projection) is different from each other. This is because the inflow water flowing into the auxiliary cyclone 100 is strongly coupled with the weighted flocculant and the sludge so that the inner and outer barrel portions of the auxiliary cyclone to break and separate the inflow water and the inner and outer barrel portions of the main cyclone into which the weighted flocculant and sludge are separated, Because the functions of the two are different.

According to the present invention configured as described above, the weighted flocculant is separated from the sludge into which the weighted flocculant is infiltrated through the auxiliary cyclone 100, and the weighted flocculant separated from the auxiliary cyclone 100, The water and sludge that have not yet escaped into the discharge pipe 122 are introduced into the main cyclone 200 again to separate and discharge the water and the sludge mixed with the weight coagulant and to separate the weight coagulant once again to maximize the separation efficiency .

That is, in the auxiliary cyclone 100, the sludge (microorganism) and the raw water, which are agglomerated by the weighted flocculant, are mixed in the circumferential direction of the outer barrel portion 111 through the raw water supply passage portion 101, Water and sludge (microorganisms) having a low specific gravity are lifted up through the inside of the perforated screen 123 through the fluid passage 123h, and the upper discharge pipe (Not shown). At the same time, the weighted coagulant introduced into the inside of the outer barrel section 111 is lowered while rotating along the inner surface of the outer barrel section 111 and the outer cone section 112 with a large specific gravity, .

In this case, the sludge is finely crushed while passing through the inside of the raw water supply passage portion 101, and the weighted flocculant is separated from the sludge while rotating downward along the inside of the outside barrel portion 111, Water and sludge that have not been able to reach the upper discharge pipe (122) through the screen (123) are discharged to the lower side along the lower discharge pipe (113).

In general, a constant or wastewater is flocculated by adding various weighted flocculants such as activated carbon, microsand, magnetite, etc. to sediment the sludge. Therefore, the weighted flocculant is tightly bonded to the settled sludge, and the sludge and the weighted flocculant do not separate even when passing through a general cyclone, and most of the flocculant remains in the sludge even after the water is removed through the cyclone. Therefore, if such sludge is discarded as it is, the new weighted flocculant is continuously injected, which requires a lot of operation cost.

The present invention provides a multi-stage multi-stage auxiliary cyclone and a sludge introduced into the sludge as a raw water through a main cyclone connected to the multi-stage multi-stage, forcibly separating the weighted flocculant, The weighted flocculant is rapidly and rapidly separated from the waste water, thereby remarkably increasing the recyclability of the weighted flocculant.

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 Is formed. It is sufficient that the inner and outer projections do not become smooth regardless of the cylindrical shape, the polygonal shape or the like in the lens barrel portion.

Therefore, when the sludge (microorganism) and the raw water which are agglomerated by the weighted flocculant adhere and are rapidly introduced through the raw water supply passage 101, the inflow water flows between the outer barrel section 111 and the inner barrel section 121 The inner protrusion 111a strongly collides with the outer protrusion 121a while rotating. At this time, the sludge contained in the inflow water randomly collides with the inner protrusion 111a and the outer protrusion 121a, and the weight coagulant and the sludge are separated by the impact force.

The sludge is rapidly rotated between the outer barrel portion 111 and the inner barrel portion 121 to collide with the inner protrusions 111a and the outer protrusions 121a to separate the weighted flocculant, And is lowered along the cone-shaped upper portion 112 and the perforated screen portion 123. Then, water and sludge (microorganisms) having a low specific gravity flow upward through the fluid through hole 123h formed in the perforated screen unit while rotating around the perforated screen unit 123, The weighted coagulant discharged from the sludge is discharged through the lower discharge pipe 113 while being continuously lowered. This is accomplished by the principle of a cyclone in which the fluid flows into the body for rotation and the body is cone-shaped.

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

Accordingly, the present invention is configured to prevent clogging of the fluid through hole 123h. 6, the body portion 123a of the perforated screen portion 123 is formed with a plurality of through holes 123a in the clockwise direction along the flow direction of the raw water so that the fluid through holes 123h are not directly exposed to the inflow water A deflection projection 124 is formed so as to project obliquely.

The deflection protrusion 124 is spaced apart from the body portion 123a by a distance d from the body portion 123a of the perforated screen portion 123 toward the end portion. It is possible to flow into the fluid through hole without passing through the deflecting protrusion 124 while rotating in the direction in which the weighted flocculant is moved without being directly exposed to the flowing raw water. Since the deflecting protrusion 124 is not simply protruded from the perforated screen 123 but the upper portion is protruded in a clockwise direction and the fluid through hole 123h into which the raw water flows is positioned 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 like water, the moving direction must be suddenly changed after passing the deflection projection 124 according to the moving direction. Since the raw water flowing into the raw water supply passage 101 has a very high moving speed, the possibility of suddenly changing direction after passing through the deflecting protrusion 124 is low.

Accordingly, since the rotating weighted coagulant is less likely to enter the fluid through hole after changing the direction after passing through the deflection projection 124, only the water and the sludge (microorganism) having a very small size flow into the upper discharge pipe 122.

Through this structure, the water and sludge, which are rapidly rotated along the body portion 123a of the perforated screen portion 123, are introduced into the interior of the perforated screen portion 123 through the fluid hole 123h, The flocculant does not flow into the fluid through hole but continues to rotate downward and flows into the main cyclone 200.

Further, the present invention is formed such that the interval (a) of the fluid through holes 123h is smaller than the diameter (b) of the particles (P) of the weighted flocculant. Therefore, the particles of the weighted flocculant separated from the sludge can enter between the deflection projections and the deflection projections to prevent the fluid through holes 123h from clogging. Even though the particles of the weighted flocculant are trapped and fixed in the middle of the other deflecting projections that are continuous with the end of the deflecting projection, the particles of the float-weighted flocculant flowing successively from the rear collide with each other to remove the fixed weighted flocculant particles.

Accordingly, it is possible to prevent the fluid through hole 123h formed in the perforated screen 123 from being clogged by the particles of the weighted flocculant, to separate only the water and the microorganism, and the weighted flocculant is discharged to the upper discharge pipe 122 The probability is very low. Since the diameter of the weighted flocculant varies depending on the kind of the flocculant, the interval between the deflecting projections is determined by the kind of the weighted flocculant used.

As shown in FIG. 6, the outer shape of the deflection protrusion 124 is rounded so that the flow of the fluid is facilitated.

Next, the perforated screen portion 123 is closed by forming a sharp peak to make the separation of the weighted flocculant and water and sludge more perfect. When all the existing cyclones are separated, the lower end is opened when the inflow component is used, and the movement path of the component having a small specific gravity becomes the passage. Such an open lower end is not completely separated from the mixed state, and a component having a large specific gravity can escape together.

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

In the present invention, the end of the perforated screen 123 is sharpened to prevent the weighted flocculant from moving together when water and sludge having a low specific gravity are rotated by rotation, and a material having a large specific gravity such as a weighted flocculant Which will in principle block the inflow path.

The present invention is exclusively discharged to the upper discharge pipe 122 only through the fluid through hole 123h located on the back side of the clockwise inclined deflection hole of the perforation screen 123. [

According to the present invention, in the auxiliary cyclone 100 as described above, the weighted flocculant recovery efficiency of 90% or more was exhibited and the efficiency of recovering the flocculant was 98% or more while passing through the main cyclone 200 again.

The solid-liquid separating apparatus 100 having the above-described deflection perforation screen according to the present invention includes the outer lens barrel 111 in which the inner protrusion 111a is formed and the inner lens barrel 100 in which the outer protrusion 121a is formed 121), and the sludge is broken (referred to as a 'brake section A') and the outer cone section (112) where the incoming raw water strongly collides with the inner protrusion (111a) and the outer protrusion (121a) And the perforated screen unit 123. The sludge and the weighted flocculant are separated from each other through the brake section so that the water and the sludge are centered, the weighted flocculant is divided into a side part (referred to as a 'separated section B' A weighted flocculant which is provided in the lower discharge pipe 113 and separated from the separation section, and an area (referred to as 'transmission section C') where water and sludge that have not reached the upper part are transferred to the main cyclone.

Therefore, when the raw water containing the sludge containing the weighted flocculant is supplied to the raw water supply passage 101, the sludge contained in the raw water is broken in the brake section and then separated in the separation section, Flows through the fluid through hole 123h of the collector 123 and is discharged through the upper discharge pipe 122 and the weighted flocculant descends along the inner wall surface of the outer cone portion 112, And is discharged through the discharge tube 113. At this time, some of the sludge and water which can not reach the upper discharge pipe (122) are transferred through the lower discharge pipe (113).

As described above, according to the present invention, the weighted flocculant separated through the auxiliary cyclone 100 and a part of the sludge and water contained therein are also supplied to the main cyclone (not shown) through the lower discharge pipe 113 of the outer cylinder 110 200 to the main outer-side barrel portion 211.

The lower discharge pipe 113 is bent at 90 degrees from the middle and connected to the main outer tube 210 and coupled to the upper side of the main outer tube 210 as shown in FIG. The number of the auxiliary cyclone 100 is about 2 to 4 for the amount of the weighted coagulant, water, and sludge discharged to the lower discharge pipe 113 and the weighted coagulant that escapes to the main lower discharge pipe 213 without interruption Do.

The lower discharge pipe 113 of the auxiliary cyclone 100 is connected to the main cyclone 200 so that the weighted flocculant, water and sludge introduced into the upper portion of the lower discharge pipe 113 continuously flows out to the main cyclone 200 The bottleneck phenomenon does not occur in the lower discharge pipe 113, so that the auxiliary cyclone 100 can be continuously operated without interruption.

The weighted flocculant introduced into the main cyclone 200, a part of the water and the sludge (hereinafter referred to as 'secondary inflow water') is formed into a conical shape of the upper and lower cylindrical portions, And the water and sludge contained in the weighted flocculant are separated again as the water and sludge having a low specific gravity are separated from each other again by the incoming force, The weighted flocculating agent having a large specific gravity flows through the main perforations 221h formed in the main perforated screen portion 221 and then flows into the main outer cylinder 211 through the main perforation 221h, And is discharged to the main lower discharge pipe 213 provided at the lower side of the main outer cylinder portion 211. [

The main lower discharge pipe 213 has a storage tank 230 for storing the weighted coagulant discharged to the main lower discharge pipe 213.

The main inner tube portion 220 is divided into an upper main inner barrel portion 225 having no perforation screen and a lower main perforation screen portion 221 having a perforation screen, And is connected to the barrel section 225. The secondary inflow water flowing into the lower discharge pipe 113 is in contact with the main inner barrel portion 225 which has no perforation and descends downward while rotating, and then the main perforated screen portion 221 having a rounded shape The water and the sludge enter into the pore, and the weighted flocculant rotates and descends to the main lower discharge pipe 213. The diameter of the main through hole 221h of the main perforated screen portion 221 is smaller than the diameter of the weighted flocculant. Further, in the main through hole 221h of the main perforated screen portion 221, there is no deflecting projection for covering the front end of the main through hole in the rotating direction.

At this time, the main perforated screen unit 221 is greatly different from the perforated screen unit 123 of the auxiliary cyclone. The perforated screen unit 123 has a conical shape with a lower portion and the main perforated screen unit 221 has a rounded protruding shape. Both the water and the sludge pass through the closed perforated part with the lower end closed. The reason for this difference is that the rotational speed and the composition of the inflow water flowing into the auxiliary cyclone 100 and the main cyclone 200 are different. The inflow water flowing into the auxiliary cyclone has a very fast inflow rate, while the inflow rate of the second inflow water into the main cyclone is slow. The perforated screen portion in the auxiliary cyclone having a very high inflow speed is required to have a configuration capable of preventing the weighted flocculant from being fixed to the perforations of the screen and preventing perforation, and the perforation screen in the main cyclone, It is very unlikely that the weighted coagulant will stick to the perforations, so a configuration is needed that can separate many of the water and sludge.

In addition, the auxiliary cyclone 100 rotates at a high speed and the proportion of the weighted flocculant is small, so that the weighted flocculant is mainly rotated at the inner edge of the outer cone top portion and is unlikely to be around the perforated screen portion 123. In addition, the weighted flocculant rotates at the edge of most of the upper part of the auxiliary cyclone, and the area of movement to the center is wider as it goes downward.

On the other hand, in the main cyclone 200, the rotation speed is low and the ratio of water and sludge passing through the screen is very low, so that it can be contacted with water and sludge in a wider area. Therefore, the perforated screen portion 123 of the auxiliary cyclone for reducing contact with the weighted flocculant is gradually reduced in cone shape, and the main perforated screen portion 221 of the main cyclone has a rounded convex shape.

For this reason, the diameter of the perforated screen portion 123 of the auxiliary cyclone 100 is smaller than the diameter of the main perforated screen portion 221 of the main cyclone 200.

The inner and outer barrel portions 111 and 121 of the auxiliary cyclone 100 are provided with an inner protrusion and an outer protrusion. In contrast, no protrusion is provided between the main outer cylinder portion 211 of the main cyclone 200 and the main inner cylinder portion 220. Since the weighted flocculant and sludge are separated from each other in the auxiliary cyclone 100, the water and the sludge that have not escaped from the auxiliary cyclone escape from the main cyclone while being smoothly and slowly rotated in the main cyclone while meeting with the main perforated screen unit 221 more slowly, (222).

The weighted coagulant that descends to the lower side of the main outer barrel portion 211 is discharged to the main lower discharge pipe 213 and stored in the storage tank 230.

The weighted flocculant collected and stored in the storage tank 230 through the above procedure is supplied to the raw water again by a separate treatment device (not shown).

Therefore, the present invention can quickly and quickly separate the weighted flocculant that has penetrated into the sludge of the raw water, and then reuse it, thereby drastically reducing the cost of purchasing the weighted flocculant.

Preferably, the auxiliary cyclone 100 of the present invention is constituted by a plurality of connected multi-stages at regular intervals on the outer circumference of the main cyclone 200.

As described above, according to the present invention, the weighted flocculant, the sludge and the water can be separated and processed more rapidly and quickly through the multi-stage composed of the plurality of auxiliary cyclones 100 and the main cyclone 200.

The perforated screen portion 123 provided at the lower end of the inner cylinder 120 of the auxiliary cyclone 100 of the present invention and the main perforated thread portion 221 of the main cyclone 200 are provided with the fluid through- 123h and an ultrasonic device 240 for preventing the main through hole 221h from being clogged.

Since the gap between the fluid through hole 123h and the main through hole 221h is smaller than the particle diameter of the weighted flocculant, the fluid through hole 123h and the main through hole 221h are unlikely to be clogged. However, And can be fixed. In this case, the weighted flocculant may not be separated even by the subsequent flocculant. In this case, the vibration is provided through the ultrasonic device 240 to separate the flocculant.

 Therefore, ultrasonic waves are applied to the perforated screen unit 123 and the main perforated strip unit 221 to prevent clogging of the fluid hole 123h and the main hole 221h, thereby further improving the separation efficiency.

Since the weighted flocculant used in the present invention is separated from the sludge while passing through the brake section and the separation section, it can be used regardless of the kind such as activated carbon, magnetite or microsand. In this case, a perforated screen portion corresponding to each weighted coagulant may be used. That is, the size of the fluid through hole formed in the perforated screen portion differs depending on the particle size of the weighted flocculant.

As described above, the present invention can quickly and efficiently separate the weighted flocculant from the sludge and reuse it, and the reusing rate is also very high, so that the operation cost can be drastically reduced.

Reference numeral 250 denotes a support for connecting the auxiliary cyclone to the main cyclone and firmly supporting the auxiliary cyclone.

As described above, according to the present invention, the weighted cohesive fast recovery multistage hydrocyclone

The raw water containing the sludge having the weighted flocculant infiltrated therein is separated into the lower side and the upper side by the weighted flocculant, the sludge and the water through the plurality of auxiliary cyclones, and the weighted flocculant separated through the lower side of the plurality of the auxiliary cyclones is re- The sludge and water are discharged through the upper side of the main cycle and the weighted flocculant is discharged and stored through the lower side of the main cycle to quickly and efficiently separate and discharge the sludge and the water and the weighted flocculant, And the cost of sludge treatment can be drastically reduced.

300: weighted cohesive high-speed recovery multi-stage hydrocyclone
100: Auxiliary cyclone
101: raw water supply passage portion
110:
111: outer barrel portion 111a: inner projection 112: outer cone portion 113: lower discharge tube
120: inner tub
121: inner barrel portion 121a: outer projection 122: upper discharge tube 123: perforated screen portion
123a: body portion 123h: fluid passage hole 124: deflecting projection
200: Main cyclone
210: main outer tube
211: main outer cylinder part 212: main outer cone type part 213: main lower part discharge tube
220: main inward trough
221: main piercing screen portion 221h: main through hole 222: main upper discharge pipe
225: main inside mirror cylinder
230: Storage tank
240: Ultrasonic device
250: District
a: fluid through hole size b: weighted flocculant particle size d: separation distance

Claims (6)

The inflow water mixed with the sludge agglomerated by the weighted flocculant and the raw water is introduced into the interior to separate the weighted flocculant and the sludge and the water into the perforated screen 123. The water and sludge are discharged to the upper side and the weighted flocculant is discharged to the lower side A plurality of auxiliary cyclones (100);
The weighted flocculant discharged from the lower end of the auxiliary cyclone 100 and the sludge and water contained in the flocculated flocculant are connected to the main perforated screen portion 221, and discharged to the upper side, and the weighted flocculant is discharged to the lower side,
The rotational speed of the inflow water injected into the auxiliary cyclone 100 is faster than the rotational speed of the inflow water injected into the main cyclone 200,
The shapes of the perforated screen unit 123 and the main perforated screen unit 221 that allow water and sludge to pass through the auxiliary cyclone 100 and the main cyclone 200 are different from each other,
The auxiliary cyclone 100 includes an inner wall surface of a hollow outer cylinder portion 111 through which the influent water mixed with sludge and raw water coagulated by the weighted flocculant flows into the raw water supply passage portion 101 and an inner wall surface of the outer cylinder portion 111 A plurality of projections are formed on the outer wall surface of the hollow inner barrel 121 which is opposed to the hollow inner barrel 121,
The main cyclone 200 includes an inner wall surface of the main outer tube 210 into which the weighted flocculant, water and sludge introduced from the auxiliary cyclone 100 flows and a main inner tube 220 corresponding to the main outer tube 210, The outer wall surface of which is not formed with projections, is a weighted cohesive high-speed recovery multistage hydrocyclone.
The method according to claim 1,
The perforated screen unit 123, through which the water and the sludge of the auxiliary cyclone 100 pass, is formed into a cone shape with its bottom surface formed as a pointed peak,
The main piercing screen unit 221 through which water and sludge of the main cyclone 200 are passed is a wider and rounded shape than the perforated screen unit 123, and is a weighted cohesive and fast multi-stage hydrocyclone.
delete 3. The method of claim 2,
And a deflection protrusion (124) disposed obliquely at a front end of the fluid through hole (123h) in a direction in which the inflow water is rotated in the auxiliary cyclone (100).
3. The method of claim 2,
The diameter of the perforated screen portion 123 of the auxiliary cyclone 100 is smaller than the diameter of the main perforated screen portion 221 of the main cyclone 200. The weighted multi-
3. The method of claim 2,
Wherein the auxiliary cyclone (100) comprises a multistage connected to a plurality of external stages of the main cyclone (200) at a predetermined interval.

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