KR20020038427A - Screw type dehydration apparatus - Google Patents

Abstract

PURPOSE: A screw type dehydrating device is provided to improve the dehydrating effect and to lengthen the life span of a moving plate and a driving device by precisely and uniformly vibrating the moving plate. CONSTITUTION: A screw type dehydrating device includes a casing(10), a separating device(20), a screw(30) and a plate driving device(40). The casing(10) is formed at one side thereof with a supplying section(11) and the other side thereof with a discharging section(12). Supporting plates(13,13') are installed at an inner portion of the casing(10). A water collecting section(14) is formed at a lower center portion of the casing(10). The separating device(20) has a plurality of first moving plates(21) and second moving plates(22). A perforation hole(21') is formed in the first moving plate(21), and a perforation hole larger than the perforation hole(21') is formed in the second moving plate(22). The first moving plate(21) has a triangle shape and at least two supporting holes(23) are formed at a lower portion of the first moving plate(21). A spacer(25) is inserted between the first moving plates(21). The screw(30) is inserted into a space formed in the separating device(20).

Description

Screw Type Dehydrator {SCREW TYPE DEHYDRATION APPARATUS}

The present invention relates to a screw type dewatering device, and more particularly, to an apparatus for dewatering sewage or wastewater contained in sludge generated in a sewage treatment plant or a wastewater treatment plant.

The dewatering device for separating sewage or wastewater from sludge generated in a conventional sewage treatment plant or wastewater treatment plant is a mainstream method using a filter cloth such as a filter press or a belt press, the dewatering device using the filter cloth is the sludge from the filter cloth Press to remove moisture and recover solids.

However, the dewatering device using the filter cloth is a clogging phenomenon of the filter cloth during dehydration to recover the solids, and then by spraying a high-pressure washing water to the filter cloth to clean the filter cloth to prevent the clogging of the filter cloth, so a large amount of washing water In addition, since the operator must be located at the site during the operation of the dehydration device, excessive operating costs are required. In addition, in order to increase the treatment capacity of the sludge, a large-capacity filter press or the like must be used, and a nozzle for dividing the high-pressure washing water is required, thereby increasing the size of the apparatus and increasing its manufacturing cost.

A screw filtration device for solving the above problems is disclosed in Japanese Patent Application Laid-Open No. 66-19011. The screw filtration device includes a suspension (sludge) supply port on one side and suspended fine particles on the other side. Solids) A plurality of filtration plates are provided inside the filtration tank in which the outlet port is provided, and a filter body in which a movable plate is formed between the filtration plates so as to form a fine gap. It is fixed with a bolt, and a flow hole is formed at both left and right ends of the movable plate to be opposed to a supporting rod and a rotating shaft installed through the filtration plate, and a key is installed on the rotating shaft. Screws for transferring suspended particulates deposited in the central hole toward the suspended particulate outlet are provided. .

The screw filtration device supplies a suspension to the suspension feed port and simultaneously rotates the screw, whereby water is discharged to the outside through a microgap formed between the filter plate and the movable plate, and the suspension is concentrated to the suspended particulate outlet by the screw. It is discharged. And when the suspension is concentrated, the fine particles attached to the inner circumferential surface of the filtration plate and the movable plate and the microgap are removed as the movable plate swings due to the rotation of the keyed rotational axis rotated in conjunction with the screw, thereby automatically cleaning the microgap. By regenerating, the blockage of the microgap is prevented to enable continuous operation.

However, the screw type filtration device is compact, the manufacturing cost is low, and there is an advantage to reduce the operating cost, but the movable plate supports only two points opposite the left and right ends of the support rod and the key axis of rotation axis of the screw The support rod support position of the movable plate is also moved in the same direction as the high pressure portion by the pressure of the high pressure portion generated in the circumferential direction of the blade during rotation, and the rotation shaft rotates while the support rod support position of the movable plate is moved as described above. Even if the position of the high-pressure part generated in the circumferential direction of the blade changes, the inflexion of the support rod support position of the movable plate occurs due to the resistance of the suspension fine particles attached between the fixed plate and the movable plate. Automatic cleaning of fine gaps is not good Filtration (dewatering) efficiency will be lowered.

In addition, the movable plate is arranged so as to be able to swing with one rotation shaft between the filtration plates, so that the movable plate is rocked by the filtration plate and the static friction so that the wear is fast and the torque is concentrated in the flow hole supported by the rotation shaft. As the flow hole and the key are easily worn, the life of the movable plate and the rotating shaft is shortened. As the flow hole is concealed as a fixed plate, it is difficult to check the wear state of the flow hole and the key, and it is also inconvenient to repair the wear. Is there.

SUMMARY OF THE INVENTION An object of the present invention is to provide a screw-type dewatering device capable of correcting the above-described problems, to improve automatic cleaning, and to significantly extend the life of the movable plate and its driving means.

Another object of the present invention is to provide a screw-type dewatering device which can simplify the repair when the movable plate driving means is worn.

In order to achieve the above object, there is provided a casing formed on both sides of the supply and discharge, the separating means installed in the casing, the screw inserted into the space formed in the separating means, the separating means are mutually spaced apart A plurality of first movable plates arranged to be able to oscillate in a radial direction with respect to the plurality of second movable plates arranged to be able to oscillate with a small gap between the first movable plate and the first movable plate at the interval between the first movable plates. A connecting tube formed of a plate and formed with at least two supporting holes at opposite positions of the first and second movable plates so that the movable plates are connected to each other; and inserted into the connecting tube to both sides of the casing. It is formed by a rotating shaft installed with a cam that is supported, driven in conjunction with a screw, and inscribed in a connecting pipe. Characterized in that the rocking movement.

1 is a cross-sectional view of a first 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 the first embodiment of the present invention;

4 a, b, c, d are operational state diagrams of the first embodiment of the present invention;

5 is a cross-sectional view of a second embodiment of the present invention.

<Description of Signs of Major Parts of Drawings>

DESCRIPTION OF SYMBOLS 10 Casing 20 Separation means 21 First movable plate

22: second movable plate 23, 24: support hole 30: screw

40 plate driving means 41, 41 'connector

42: rotation shaft 43, 43 ': cam 44: gear 411, 412: color

1 is a cross-sectional view of a first embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line AA of Figure 1, Figure 3 is an exploded perspective view of the main portion of the first embodiment of the present invention, the first embodiment of the present invention is a casing (10) ), The separating means 20, the screw 30 and the plate driving means 40 is the main configuration.

The casing 10 forms a supply part 11 on one side and a discharge part 12 on the other side, and at the same time, supports plates 13 and 13 ′ are installed on the inner side thereof, and a water collecting part 14 is provided on the center lower part. It is formed.

The separating means 20 is composed of a plurality of first movable plate 21 and second movable plate 22, the first movable plate 21 is not interfered with the rotation of the screw 30 to be described later. And a through hole 21 'having a diameter, and the through hole 22' having a diameter slightly larger than the through hole 21 'formed in the first movable plate 21 is formed in the second movable plate 22. The through holes 21 'and 22' are formed with a space S into which the screw 30 is inserted.

The first movable plate 21 is formed in a triangular shape to install at least two support holes 23 in the bottom portion, and then sandwiches the spacers 25 having a predetermined interval between the first movable plates 21. The second movable plate 22 described above is pivotally supported by the connecting pipes 41 and 41 'so as to be able to swing on the supporting plates 13 and 13'. ) Is formed in the same triangular shape as the first movable plate 21 to install at least two support holes 24 in the bottom portion, and then the vertices are formed at intervals formed between the first movable plate 21. The support holes 23 and 24 are opposed to each other by opposing the vertices of the first movable plate 21 and inserting the spacer 25 so that a small gap is formed between the first movable plate 21 and the second movable plate 22. Insertion pipes (41) (41 ') which laterally inserted the support hole 24 at the same time while being disposed opposite each other The first movable plate 21 and the second movable plate 22 are independently connected to each other so that the connecting pipes 41 and 41 'can swing on the support plates 13 and 13'. It is to be able to swing while crossing by the plate driving means 40. When the first and second movable plates 21 and 22 are formed and arranged as described above, each of the supporting holes 23 and 24 is formed in a substantially rectangular shape, parallel to each other, and each of the supporting holes 23 and 24. Maintains a constant distance from the periphery of the adjacent first and second movable plates 21 and 22 so that the first and second movable plates 21 and 22 can swing when the first and second movable plates 21 and 22 move. This will not interfere.

The screw 30 is inserted into the space S formed in the separating means 20 to support both ends of the shaft 31 on both sides of the casing 10, and the sludge supplied to the supply part 11. The sludge is dehydrated while being transported to the discharge part 12 side, and the solids are discharged to the discharge part 12, and the plate driving means 40 which is later described on the discharge part 12 side of the screw shaft 31 is screwed ( At the same time as installing the gear 32 for driving in conjunction with the 30), a driving source (not shown) is installed at the tip.

The pitch of the blades 33 of the screw 30 is smaller than the supply part 11 side, and the discharge part 12 side is formed smaller, and the partition plate 15 is provided at the boundary part, and the enrichment zone is provided on the supply part 11 side. Dehydration zone (B) is formed on the discharge part (12) side and the separation means (20) is divided into two parts to increase the dehydration efficiency. In this case, the water collecting part (14) It is formed by separating the first collecting unit 140 and the second collecting unit 141.

The plate driving means 40 is connected to each support hole 23 formed in the first movable plate 21 and each support hole 24 formed in the second movable plate 22. ') To interconnect the plurality of first movable plate 21 and the second movable plate 22, respectively, insert the rotary shaft 42 into the connecting pipe (41, 41') casing both ends At least two cams 43 and 43 'are supported on both sides of the 10 so as to be internally rotated in the connecting pipes 41 and 41', and at one end of the rotating shaft 42, a gear ( 44 is installed and engaged with the gear 32 installed on the screw shaft 31 so as to be interlocked with the screw 30 by a driving source. The gears 32 and 44 may also be used as belts or chains. It can be.

Both ends of the connecting pipes 41 and 41 'are fixed so that the colors 411 and 412 exposed to the outside of the support plates 13 and 13' can be disassembled, and the colors 411 and 412 are fixed. When the cams 43 and 43 'are inscribed, the wear state of the connecting pipe 41 and the cams 43 and 43' can be visually confirmed.

In the first embodiment of the present invention, the cylinder 50 surrounding the blade 33 is installed on the support plate 13 on the discharge part 12 side, and the pressure regulating plate 51 is slid to the screw shaft 31. It is installed so that the water content can be adjusted by adjusting the discharge pressure of the solid by the adjustment bolt 52 supported on the casing 10, the connecting pipe 41, 41 'may be one. .

5 is a cross-sectional view of a second embodiment of the present invention, in which the same technical means as in the first embodiment are given the same reference numerals, and a detailed description thereof will be omitted, and the difference is the diameter of the blade 33 on the enrichment zone A side. Is formed larger than the dehydration zone (B) side, and the diameter of the blade 33 is formed as described above, so that the through holes 21 'and 22' of the first movable plate 21 and the second movable plate 22 are formed. Also, the diameter of the blade 33 may be formed to match the diameter of the blade 33 to increase the concentration in the concentration zone (A) to increase the treatment capacity.

The following operation is described.

A flocculant or the like is mixed in advance with the supply part 11 formed on one side of the casing 10 to supply a sludge in a floc state, and when the screw 30 is rotated by a driving source, the sludge is discharged ( 12) and when passing through the gap between the blade 33 of the screw 30 and the through holes 21 'and 22' formed in the first movable plate 21 and the second movable plate 22 at the same time. As the water is compressed and concentrated, the water falls to the water collecting part 14 through a microgap formed between the first movable plate 21 and the second movable plate 22, and is transferred to the treatment plant. The solid content is the cylinder 50 and the pressure control plate. After being discharged to the discharge portion 12 in the cake state through the 51, it is treated by landfill, recycling and the like.

As described above, the water content of the dehydrated solids is in the range of 97 parts by weight to 75% by weight, and the water content of the solids is controlled by the rotation speed of the screw 30 and the pitch of the blades 33 on the supply part 11 side and the discharge part 12. Adjusting the same or different sides, adjusting the microgap, combining or separating the enrichment zone (A) and the dehydration zone (B), adjusting the diameter of the blade 33 of the enrichment zone (A) and the dehydration zone (B), pressure The pressure control method of the control plate 51 is to be arbitrarily selected and adjusted.

When the water content of the solid content is dehydrated to about 97 to 95% by weight, the solid content retains a relatively large amount of water. In this case, the solid content used for concentration and discharged to the discharge part 12 is sucked by a vacuum pump. It is convenient to carry on a transport vehicle.

In addition, when the separation means 20 is divided into a concentration zone (A) and a dehydration zone (B) to increase the dehydration efficiency, the water collected in the first catchment unit 140 is transferred to the treatment plant, and the second catchment unit 141 is provided. ), The moisture collected in the) contains fine solids, so that the water is circulated through the supply unit 11 to be dehydrated again.

In addition, the method of adjusting the water content is to incline the discharge part 12 side downward rather than the supply part 11 side to increase the water content in addition to the above, and to reduce the internal pressure of the separating means 20 and to reduce the water content to the supply part ( 11) The discharge unit 12 may be inclined upward rather than the side to increase the internal pressure of the separating means 20, and in order to increase the processing capacity, the separating means 20 may be overlapped up and down, and between the gears 32. By installing an intermediate gear to the screw 30 can be rotated at the same time by one drive source.

As described above, when the sludge is separated into water and solids, a part of solids enters the microgap between the first movable plate 21 and the second movable plate 22 and the solids entered into the microgap are installed in the screw 30. As the rotating shaft 42 rotates by the gear 44 meshed with one gear 32 and the rotating shaft 42 rotates, the cams 43 and 43 'provided at both sides thereof are connected to the connecting pipe 41 ( 41 '), and the oscillation motion (see Fig. 4) is performed while crossing the first movable plate 21 and the second movable plate 22 independently, thereby automatically cleaning the solids in the microgap, and the regeneration is good. The first and second movable plates 21 and 22 may be frictional to each other to extend their lifespan by exercising friction.

As described above, when the first and second movable plates 21 and 22 respectively oscillate independently, at least two support holes 23 and 24 are provided in the first and second movable plates 21 and 22. When both movable plates 21 and 22 are connected to each other by the connecting pipes 41 and 41 ', the cams 43 and 43' are internally rotated to the connecting pipes 41 and 41 '. As the connecting pipes 41 and 41 'swing along the trajectory of the cam, the first and second movable plates 21 and 22 simultaneously perform a good cross swinging motion, thereby increasing the dewatering efficiency.

In addition, the support holes 23 and 24 are formed to be exposed to the outside of the first and second movable plates 21 and 22 so that the first and second movable plates 21 and 22 are supported by the support plates 13 and 13. The drive means 40 is simple and convenient to be placed in a state arranged between ').

Both ends of the connection pipes 41 and 41 'are fixed so that the colors 411 and 412 exposed to the outside of the support plates 13 and 13' can be disassembled, and to the colors 411 and 412. When the cams 43 and 43 'are positioned, the wear condition of the collars 411 and 412 and the cams 43 and 43' can be easily visually checked, and the collars 411 and 412 and the cam are worn when worn. By replacing only (43) (43 ') with a new one, repair of the plate driving means is simple and convenient, and maintenance costs can be reduced.

As described above, the present invention consists of a plurality of first movable plates and a second movable plate in which a small gap is formed in the first movable plate so that each of the movable plates can be subjected to movement friction by independently oscillating. Therefore, the frictional force between the two can be reduced, and the life can be extended, and at least two supporting holes are formed in the movable plates, respectively, and the connecting tubes are connected to each other. As the oscillating motion is performed along the two movable plates, the crossover oscillating motion is precisely correct, so the automatic cleaning of the microgap is good, and the dehydration efficiency is increased.

And the ends of the connecting pipe are fixed so that the color exposed to the outside of the support plate can be disassembled, and by placing the cam on the color, it is easy to check the wear state of the color and the cam. By doing so, the repair of the plate drive means is simple and convenient, it is possible to reduce the maintenance cost.

Claims (5)

A casing having supply and discharge portions formed on both sides thereof, a separating means provided on the casing, and a screw provided on a space formed in the separating means, wherein the separating means can oscillate in a radial direction with a predetermined interval therebetween. And a plurality of first movable plates arranged so as to be able to swing, and a plurality of second movable plates arranged so as to be able to swing with a small gap in the gap between the first movable plate and the first movable plate. And a connecting tube inserted into each of the movable plates by forming at least two support holes at each opposite position of the second movable plate, and inserted into the connecting tubes so as to be supported on both sides of the casing and driven in conjunction with a screw. Skew formed by a rotating shaft provided with a cam inscribed in the connecting pipe and configured so that both movable plates cross and swing. Dehydration-flow devices. The screw type dewatering device according to claim 1, wherein a color is detachably fixed at both ends of the connecting pipe, and a cam is positioned at the color. The screw type dewatering apparatus according to claim 1, wherein the pitch of the screw is smaller than that of the concentration zone. 2. The screw-type dehydration apparatus according to claim 1, wherein the separating means is divided into a concentration zone and a dewatering zone, and a first catching portion and a second catching portion are formed below the enrichment zone and the dewatering zone of the casing. The screw type according to claim 1, wherein the diameter of the through holes of the first and second movable plates on the enrichment zone side of the separating means is larger than the diameter of the through holes on the dehydration zone side, and the blades of the screw are formed to match the diameters of the through holes. Dewatering device.