KR100672218B1 - Solid-liquid separation apparatus screw type - Google Patents

Abstract

A screw type of solid-liquid separation equipment of which volume is reduced, which can perform cleaning of very small gaps very well, and which prevents the cleaning means from being broken down and enables the cleaning means to be installed and dismantled promptly and simply by simplifying the structure of cleaning means, is provided. A screw type of solid-liquid separation equipment comprises: a casing(10) having a sludge inlet(11) formed at one side thereof, a solid outlet(12) formed at the other side thereof, and a catchment part(14) formed on a lower part thereof; separation means(20) comprising supporting plates(27a,27b) installed at at least both sides of the casing, a plurality of fixing rings(21) fixed between the supporting plates to form very small gaps(g) therebetween, and a screw-inserting space part(S) formed in the fixing rings; a screw(30) which is inserted into the screw-inserting space part, and on which a spiral blade(32) is formed; and cleaning means(40) comprising supporting members(41) fixed onto an outer peripheral surface of the spiral blade in an axial direction of the screw, and a plurality of cleaning blades(44) which are supported and connected to the supporting members and are inserted each into each of the very small gaps such that the cleaning blades are rotated only by rotary power of the screw.

Description

Screw Type Solid / Liquid Separator {SOLID-LIQUID SEPARATION APPARATUS SCREW TYPE}

1 is a longitudinal sectional view of an embodiment of the present invention;

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

3 is an exploded perspective view of main parts of an embodiment of the present invention;

4a to 4d is an operational state diagram of the embodiment

5a to 5c is an exploded view of the cleaning blade of the embodiment of the present invention

               <Explanation of Signs of Major Parts of Drawings>

10 casing 20 separation means 21 retaining ring g small gap

30 screw 32 spiral-shaped blade 40 cleaning means 41 support member

42: support bar 44: cleaning blade

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw-type solid and liquid separation device, and more particularly, to sludge, suspensions, various industrial wastewaters (hereinafter referred to as "sludge") generated in sewage treatment plants, wastewater treatment plants, manure treatment plants, and paper mills. The present invention relates to a screw press solid and liquid separation device for separating liquids.

For example, sludge generated in a sewage treatment plant is usually low in concentration (water content of 99.3 to 99.5% by weight), and the sludge of low concentration is usually transported to another place by a vehicle for landfilling, incineration, and recycling. When driving to another place by using a vehicle as described above, it is concentrated and dehydrated and transported to reduce the logistics cost.

Conventional solid-liquid separators include Japanese Patent Application Laid-Open No. 6-42928, Korean Patent Publication No. 121732 (PCT Patent Application Publication WO 93/16867), Japanese Patent Application Laid-open No. Hei 11-33316, and Korean Registered Patent 413164 is disclosed.

The Japanese Unexamined Patent Application Publication No. 6-42928 discloses a cylindrical body by fixedly connecting a plurality of rings arranged in the axial direction with a small distance therebetween, and forming a cylindrical body in the axial direction of the screw shaft inserted into the inner space of the cylindrical body. A screw conveyor for conveying sludge water by the wings arranged and fixed in a spiral shape, and inserted into the micro-gaps between the plurality of rings on the respective blades, and cleaning the solids invading each gap into the inner space of the cylindrical body. The sludge solid-liquid separator with the blade is described,

The Korean Patent No. 121732 discloses a solid-liquid separator consisting of a plurality of fixing rings which are arranged in the axial direction with a gap therebetween and integrally fixed, and a flow ring disposed in a gap between the fixing rings. Wow; A screw conveyor rotatably disposed in the plurality of fixed rings and the flow ring; A solid-liquid separator having drive means for driving the screw conveyor, the inner diameter of each of the flow rings is set smaller than the outer diameter of the screw conveyor, and a projection which is forcibly rotated by the screw conveyor on the inner circumferential surface of the flow ring is installed. Listed,

In Japanese Laid-Open Patent Publication No. 11-33316, a ring-shaped rotating plate is arranged concentrically between ring-shaped fixing plates to form a normal filter body, and an inlet is provided at one side of the filter body and an outlet is provided at the other side. At the same time, the screw is stored in the filter material in a rotational manner, and the screw is rotated to drive the suspension into the inlet toward the outlet, and the moisture of the suspension is discharged at the interval between the fixing plate and the rotating plate. In the solid-liquid separation device, the rotating plate is rotatably supported and at the same time forms a gear on the rotating plate to connect the gear to the actuator via a gear train, and to rotate the rotating plate by the actuator, On the inner circumferential surface of the rotating plate to form a projection that can contact the screw , And driven by the rotation of the screw is the one screw-type solid-liquid separation device is described to rotate the rotary plate,

The Korean Patent No. 413164 discloses a separation tank having a sludge supply part and a solid content discharge part formed on both sides; Separation means consisting of a plurality of flow plates arranged in the separation tank fixed to each other at a predetermined interval, the fixed plate and a small gap in the gap between the fixed plate and the space formed in the separation means A screw installed in the unit, and a flow plate driving means driven in conjunction with the screw, wherein the flow plate driving means includes a cam installed on a screw shaft, a drive plate supporting an upper center on the cam, and the drive. A screw-type solid-liquid separation device is described which consists of a connecting bar supported on both sides of the lower part of the plate and supported on a support piece formed on the flow plate so as to swing the flow plate along the contour of the cam.

However, the sludge solid-liquid separator of Japanese Patent Application Laid-Open No. 6-42928 can form a small gap directly between a plurality of rings forming a cylindrical body to separate the water through the small gap to reduce the volume. The screw conveyor has a number of blades fixed to the screw shaft, but the cleaning blade formed at the tip of each blade is inserted into the micro-gap, so that the blades are severely damaged and a lot of time is required even when the blades are replaced. There is a problem that takes a lot of money.

The solid-liquid separator described in Korean Patent No. 121732 has a simple rotating structure of the flow ring, but the solid-liquid separator consists of a fixed ring and a flow ring, which occupies a large amount of space and occupies a large amount of space, and the inner diameter of the flow ring is screw conveyor. It is formed smaller than the outer diameter of the screw to rotate the flow ring directly by the blade of the screw conveyor is short life due to the early wear of the blade and the flow ring of the screw conveyor, and a large amount of solids in the gap between the fixed ring and the flow ring In case of intrusion, the resistance acting on the flow ring becomes large, and there is a fear that the protrusions placed on the inner circumferential surface of the flow ring may be broken.

The screw-type solid-liquid separator described in Japanese Patent Application Laid-Open No. 11-33316 has a large volume and occupies a large occupied space by constituting the filter body with a fixed plate and a rotating plate, as described in Korean Patent No. 121732. Among the rotating plate driving means, a gear is formed on the outer circumference of the rotating plate and the gear is driven by an actuator via a gear train. The structure is complicated, and a screw is formed on the inner circumferential surface of the rotating plate to form a projection to contact the screw. Rotating to follow the rotation of is required to take a lot of money and time to separate the filter medium in case of breakage of the projections, such as Korean Patent No. 121732.

In addition, the Korean Patent No. 413164 discloses a good cleaning of solids invading the microgap by swinging the flow plate by the flow plate driving means, but the volume is large because the separation means is composed of a fixed plate and a flow plate. Since the floating plate driving means is composed of a cam, a driving plate, and a connecting bar, it is not only complicated in structure, but also it is difficult to clean the micro gap because the driving plate is difficult to swing along the outline of the cam when the floating plate is overloaded. It is not possible.

In view of the above circumstances, the present invention provides a screw-type solid that reduces the volume and improves the cleaning of the micro clearances, and simplifies the structure of the cleaning means so that there is no failure and the installation and disassembly is quick and easy. To provide a liquid separation device.

In order to achieve the above object, the present invention provides a sludge inlet on one side, a solid discharge portion on the other side, and a casing formed a catchment portion on the bottom; Separating means for installing a support plate on at least both sides of the casing to fix a plurality of fixing rings to the support plate so that a small gap is formed, and forming a screw insertion space therein; A screw inserted into the screw insertion space and forming a spiral blade; A support member is fixed to the outer circumferential surface of the spiral blade in the axial direction of the screw, and a plurality of cleaning blades are supported and coupled to the support member to insert at least one of the cleaning blades for each of the micro gaps, thereby rotating only by the rotational force of the screw. It consists of cleaning means.

1 is a longitudinal cross-sectional view of an embodiment of the present invention, Figure 2 is a cross-sectional view taken along line AA of Figure 1, Figure 3 is an exploded perspective view of the main portion of the embodiment of the present invention, the present invention is a casing 10, separation means 20, It is roughly divided into the screw 30 and the cleaning means 40.

The casing 10 forms a sludge inlet 11 at one side, a solids discharge 12 at the other side, and a wall 13a, 13b at the front and rear, and a water collecting unit 14 at the bottom. , Is installed on the upper surface of the bed (15).

The separating means 20 forms a circular hole 22 having a diameter that does not interfere with the rotation of the screw 30 to be described later in the plurality of circular fixing rings 21, and four fixing pieces around the periphery. The support hole 24 is formed between the fixing pieces 23 by forming a support hole 24 in the fixing piece 23 at the same time as forming the body 23 integrally with the supporting piece 24. ) And the fixing bar 26 is inserted into the spacer 25 to form a small gap (g) of 0.2 to 1 mm between the fixing rings 21 and at the same time, a circular hole 22 formed in the fixing ring 21. A support plate provided at the sludge inlet part 11 and the solid discharge part 12 by forming a screw insertion space part S) and supporting both ends of the fixing bar 26 on the bed 15. It is fastened and fixed to nuts 27a and 27b by nuts 28a and 28b.

The screw 30 forms a spiral blade 32 on the outside of the screw shaft 31 to be inserted into the screw insertion space portion S, and at the same time, both ends of the support plate 27a and the solid discharge portion 12. After supporting the outer wall of the drive source 33 is installed on the solid discharge portion 12 side, the sludge supplied to the sludge inlet 11 is to be transferred to the solid discharge portion 12 side.

And it is installed on the solid discharge portion 12 side of the screw shaft 31 to slide the back pressure plate 34 to adjust the dehydration rate by adjusting the discharge pressure of the solid.

In addition, the sludge inlet 11 forms the discharge center at the center of the screw shaft 31, and also forms the lower side of the outer wall 16 to be inclined toward the solids discharge portion 12, so that the sludge inflowed to the sludge is sludge inlet. In order to prevent the floc from being broken when supplied to (11), the separation efficiency is improved, and the outer wall 16 is provided with a hole 17 to provide an opening and closing plate 18, thereby simplifying the internal inspection. It is easy to remove the over-injected sludge.

On the other hand, the separation means 20 divides the substantially center of the separation plate 29 into a concentration zone on the sludge supply part 11 side (right side in FIG. 1), and a solids discharge part 12 side (left side in FIG. 1). The dehydration zone is formed in the blade 30, and the blade 32 of the screw 30 has a pitch of the dehydration zone side smaller than the pitch of the condensation zone so that the sludge can be concentrated and dehydrated to adjust the water content of the solid content to 95% by weight. .

The cleaning means 40 fixes the support member 41 to the outer circumferential surface of the spiral blade 32 of the screw 30 in the axial direction of the screw 30, and the cleaning blade 44 to the support member 41. ) By inserting at least one into each microgap (g) between the fixing ring 21 to rotate only by the rotational force of the screw 30, the thickness of the cleaning blade 44 is the microgap ( It is formed smaller than g) to form a water film between the fixing ring 21 and both sides of the cleaning blade 44.

The support member 41 forms two support bars 42 in a set, and each support bar 42 is formed by forming grooves 43a and 43b at regular intervals on the outer circumferential surface of the spiral-shaped blade 32. Inserted and welded to each support bar 42 to maintain a constant interval, the cleaning blade 44 is formed on both ends of the blade main body 45, the engaging projections (46a, 46b) to form each support bar 42 ), And one side of the blade body 45, that is, the starting point of rotation, is formed as the inclined surface 47, so that the inflow into the fixing ring 21 of the solids is good when rotating between the micro gaps g. This improves cleaning and minimizes rotational resistance.

And the other side of the blade main body 45 is formed with a tool catching groove 48 can be easily withdrawn when replacing the cleaning blade (44).

On the other hand, the support member 41 is installed in two pairs facing each other or two or more sets, as described above when two or more sets of the support member 41 and the micro-gap (g) between the fixing ring 21 and When the cleaning blade 44 does not interfere when the cleaning blade 44 is not installed on the support member 41 of the interference portion due to the interference between the outer circumferential surfaces of the spiral blades 32, the cleaning blade 44 is crossed. Since the cleaning blade 44 can be easily installed in all the micro gaps (g), the separation efficiency can be maximized.

The following operation is described.

When the screw 30 is rotated by the driving source 33 while supplying the sludge in a floc state in which a flocculant or the like is mixed in advance to the sludge supply unit 11 formed on one side of the casing 10, the sludge is solid content. In the micro-gap (g) formed between the blade 32 of the screw 30 and the screw insertion space (S) and the fixing ring 21 when the sludge is transferred as described above, and is conveyed to the discharge part 12 side. Squeezed and concentrated, the liquid is dropped into the water collecting unit 14 through the micro-gap (g) and transported to the treatment plant, etc., and the solids are concentrated, that is, dehydrated and discharged to the solids discharging unit 12 to reduce the sludge. It is.

In the present invention, when the liquid is dewatered and separated from the sludge, the number of rotations of the screw 30 is adjusted, or the thickness of the spacer 25 inserted between the fixing rings 21 is adjusted to fine-gap (g). By adjusting or randomly selecting a conventional method such as adjusting the inclination angle of the separating means 20 to adjust the moisture content, that is, the degree of concentration of the solid content, if the moisture content of the solid content is adjusted to 75 to 80% by weight, the solid content in the following process It is convenient to handle.

When the liquid is separated from the sludge as described above, a part of the solid content enters the microgap g formed between the fixing rings 21, and the solid content entered into the microgap g is a spiral blade of the screw 30 ( The cleaning blade 44 installed at 32 is rotated with the rotation of the screw 30 to automatically clean and regenerate the microgap g, and the solidified content is recovered to the screw insertion space S.

In the present invention, a small gap (g) is directly formed between the fixing rings (21) of the separating means (20), and the cleaning blade (44) is inserted into the micro gap (g) to significantly reduce the volume and reduce the manufacturing cost. To reduce the cost.

 When the screw shaft 31 is rotated as described above to transport the sludge, the support member 41 is fixed to the outer circumferential surface of the spiral blade 32, and the cleaning blade 44 supported and coupled to the support member 41. The liquid separation efficiency is better than that of the conventional flow ring method by cleaning solids at the full width (fixed ring total thickness) of the microgap g while rotating only by the rotational force of the screw 30. (See FIGS. 4A to 4D. )

In addition, the cleaning blade 44 is inserted into the micro-gap g so that a water film (water bearing action) is formed between both surfaces and the fixing ring 21 when the sludge is dewatered, and the cleaning blade 44 is a support member. When one side surface is largely frictioned with the fixing ring 21 when it is inserted into the micro clearance g between the fixing rings 21 because it is coupled to the support 41, that is, the friction moves in a small direction. By maintaining the automatic spacing, the wear can be dramatically reduced and the life can be greatly extended.

If the cleaning blade 44 is worn after being used for a long time, the tool (T) is inserted into the tool catching groove (48) by holding the tool (T) between the micro gaps (g) as shown in FIGS. When pulled out, the locking jaw 46b is pulled out of the support bar 42, and when the locking jaw 46b is formed to protrude to the outer circumference of the fixing ring 21, it is easy to separate the locking jaw 46a from the support bar 42 by hand. Since the cleaning blade 44 can be quickly separated and replaced, and the installation is the reverse of the above separation, the separation and cleaning of the cleaning blade 44 can be performed quickly and easily, thereby improving productivity and reducing operating costs. It is.

As described above, the present invention forms a micro gap directly between the fixing rings of the separating means, and by inserting a cleaning blade into the micro gap, the manufacturing cost can be reduced by greatly reducing the volume and reducing the manufacturing cost. The support member is fixed to the outer circumferential surface of the upper blade, and the support blade is coupled to the support member and the cleaning blade is inserted into the microgap to automatically clean the solids of the full width of the microgap with only the rotational force of the screw. Compared to the conventional flow ring method, the liquid separation efficiency is good, there is little wear of the cleaning blade, and can be quickly and easily separated and replaced even if worn out for a long time, thereby improving productivity and reducing operating costs.

Claims (5)

A casing in which a sludge inflow part is formed at one side, a solid content discharge part is formed at the other side, and a water collecting part is formed at the bottom; Separating means for installing a support plate on at least both sides of the casing to fix a plurality of fixing rings to the support plate so that a small gap is formed, and forming a screw insertion space therein; A screw inserted into the screw insertion space and forming a spiral blade; A support member is fixed to the outer circumferential surface of the spiral blade in the axial direction of the screw, and a plurality of cleaning blades are supported and coupled to the support member to insert at least one of the cleaning blades for each of the micro gaps, thereby rotating only by the rotational force of the screw. Screw-type solid and liquid separation device composed of cleaning means. 2. The separation means according to claim 1, wherein the separating means divides an approximately central portion of the separating plate to form a concentration zone on the sludge supply side and a dewatering zone on the solids discharge side, and the spiral blade of the screw concentrates the pitch on the side of the dehydration zone. Screw-type solid and liquid separation device formed smaller than the pitch of the zone. The screw type solid / liquid separator according to claim 1, wherein the sludge inlet is formed at the center of the screw shaft, the outer wall is inclined downward toward the solids discharge portion, and the outer wall is formed with a hole to form an opening and closing plate. . 2. A screw-type solid / liquid separation device according to claim 1, wherein the cleaning means is provided with two sets of symmetry. According to claim 1, wherein the support member of the cleaning means is formed by a pair of two support bars, the groove formed on the outer circumferential surface of the spiral-shaped blades of the screw to insert and support each support bar, the cleaning blade is inserted at both ends of the blade body Screw-type solid-liquid separation device is formed in the engaging jaw to engage each of the supporting bars, one side of the blade body, that is, the starting point of rotation to the inclined surface.

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