KR100897359B1 - Belt press for sludge - Google Patents

Abstract

The present invention relates to a dewatering device for sludge which distributes the sludge evenly on the belt to improve the dewatering function. The present invention relates to a sludge dewatering device that receives agglomerated sludge and distributes the sludge to have a set width and thickness, and receives the sludge discharged from the dispensing tank. In the dewatering apparatus for sludge having a lower belt which is moved in the state mounted on the primary gravity dewatering, and the upper belt is installed in close contact with the lower belt for a predetermined length to pressurize and dewater the sludge secondary, the distribution tank 22 ) Is installed in the width direction in the width direction of the inside and having a plurality of dehydration holes (42) and the elastic surface formed long in the longitudinal direction and formed in the circumferential direction in the outer surface of the dehydration container (40) Wings 44, the dehydration drainage pipe 60 is connected to one side of the dehydration container 40 to drain the water dehydrated in the sludge, and rotates the dehydration container 40 The same rotational motor 41 which is characterized by incorporated.

Sludge, dewatering, distribution, flow rate, thickness

Description

Dewatering device for sludge {Belt press for sludge}

1 is a front configuration diagram showing an overall dewatering device for sludge according to the prior art;

FIG. 2 is a partial cutaway perspective view of the sludge dispensing portion of FIG. 1 in detail; FIG.

Figure 3 is a front configuration diagram of the sludge dewatering apparatus according to the invention as a whole;

4 is an external perspective view showing the main parts of the present invention in detail;

FIG. 5 is an exploded perspective view for explaining a structure in which a moving partition which is a main part of FIG. 4 is coupled to a distribution tank; FIG.

Figure 6 is a detailed cross-sectional view showing the structure of the dehydration container that is the main part of the present invention;

7 is an exploded perspective view of FIG. 6;

FIG. 8 is an exploded perspective view for explaining a configuration in which the sludge width adjusting portion, which is another main portion of FIG. 4, is provided in the distribution tank.

※ Explanation of symbols about main part of drawing ※

10, 16: piping 12, 18, 62: valve

22: distribution tank 25A, 25B, 25C: side wall

30: moving partition 36, 73: cylinder

40: dehydrator 40a: thread                 

41: motor 42: dehydration hole

44: wing 51: connector

54: brush axis 55: brush

60: dehydration drain pipe 70A, 70B: sludge width control plate

73a: Rod 75a: Thread

81: sensor 82: controller

110: upper belt 120: lower belt

140: sludge supply tank 142: agitator

144: sludge supply pipe

The present invention relates to a sludge dewatering device, and more particularly, to a sludge dewatering device in which sludge is evenly distributed on a belt to improve a dewatering function.

In general, sludge generated from wastewater treatment facilities for purification of wastewater, etc. is compressed to a predetermined size so that it can be incinerated (so called sludge compressed to a predetermined size is called a 'cake'). For this to work properly, it is very important to minimize the moisture content in the sludge.

Moisture contained in the sludge can be removed by various methods, and a widely used conventional method is to simultaneously perform gravity and pressurized dehydration using a dewatering apparatus called a belt press as shown in FIG. .

In detail, the conventional dewatering apparatus 100 includes an upper belt 110 and an upper belt installed to move in an endless track by a driving roller 112 that receives rotational power from the rotating motor 130. It is disposed below the 110 and includes a lower belt 120 is installed so that the endless track movement by the drive roller 122 is rotated by the rotational power from the rotary motor 130, the upper belt 110 and The lower belt 120 is installed to face each other in a form in which a predetermined length is in close contact with each other. At this time, the lower belt 120 has a region of a predetermined length for transporting the sludge to the portion in close contact with the upper belt 110.

In addition, the sludge and the polymer coagulant are agitated by the stirrer 142, and the sludge supply tank 140 is provided to agglomerate the sludge into a large form and supply it to the lower belt 120, wherein the sludge is the sludge supply tank. When supplied onto the lower belt 120 at 140, the sludge distribution unit 180 for distributing the sludge evenly to the upper surface of the lower belt 120 is provided.

As shown in more detail in FIG. 2, the sludge distribution unit 180 is provided in a box shape in which the wall of the rear part with respect to the traveling direction of the lower belt 120 is opened and the traveling direction of the lower belt 120 is provided. The dispensing tank 182 receiving the sludge from the sludge supply pipe 144 connected to the sludge supply tank 140 through the front portion for the and is formed long in the width direction of the lower belt 120 of the distribution tank 182 When the sludge is introduced into the space formed between the distribution tank 182 and the partition wall 184 by being fixed to the inside and the bottom thereof includes a partition wall 184 formed slightly higher than the lower end of the distribution tank 182, the sludge is It has a configuration that is evenly distributed to have a predetermined thickness in the width direction of the lower belt 120 through the gap formed in the lower portion of the partition 184.

 Unexplained reference numeral 150 denotes a scraper elastically tightly attached to the upper belt 110 and the lower belt 120 to remove the sludge attached to the surface of the belt 110, 120, 160 is A cleaner for removing the foreign matter of the lower belt 120 by spraying the high pressure water on the surface of the lower belt 120, 170 is to contain the sludge removed from the belt surface by the knife 150. Represents a sludge hopper.

The operation of the dehydration apparatus 100 is as follows.

Sludge supplied from the sludge supply tank 140 to the lower belt 120 is transported a predetermined distance while being mounted on the lower belt 120, and a part of the water contained in the sludge passes through the lower belt 120 by gravity. Gravity dehydration is performed.

Subsequently, the sludge that has undergone the gravity dehydration process is pressurized while passing through the portion in which the upper belt 110 and the lower belt 120 are in close contact, and thus is pressed between the upper valve 110 and the lower belt 120 to the sludge. Pressurized dehydration is performed to remove residual moisture.

In addition, the sludge that has undergone the pressurized dehydration process is removed from the belts 110 and 120 by the scraper 150 to be removed by the sludge hopper 170, and the water separated from the sludge by gravity and pressurized dehydration is reprocessed. Fed to and reprocessed. In addition, foreign substances such as sludge attached to the lower belt 120 are cleanly cleaned by the high pressure water injected from the cleaner 160.

However, the above conventional dehydration apparatus has the following problems.

Sludge dewatering capacity in the gravity and pressure dewatering process is changed according to the clean state of the lower belt 120, the lower belt 120 only by the structure for cleaning the lower belt 120 by spraying high pressure water from the cleaner 160 It is impossible to clean the foreign matter such as sludge that penetrated between the wool of), which lowers the dehydration ability in the gravity and pressure dehydration process. This is not only because the water contained in the cake-treated sludge (usually containing waste and wastewater components that are the main contributors to environmental pollution) has exceeded the allowable range, but also requires a high cost for reprocessing the sludge. If it is disposed of without carrying out, there is a problem that causes environmental pollution.

In addition, the dehydration capacity in the gravity and pressure dewatering process is greatly affected by whether or not the sludge is evenly distributed at a certain height to the upper portion of the lower belt 120, the partition wall 184 plays an important role in the distribution of the sludge Since the position of the is fixed, if the sludge discharged from the sludge supply pipe 144 is too large, the sludge overflows to the top of the partition 184, the sludge is not properly distributed, if the sludge flow rate is too small partition ( 184) The sludge distribution is not performed properly because the sludge distribution function is not performed properly. Since the thickness of the sludge distributed to the lower belt 120 is changed according to the flow rate of the sludge supplied through the sludge supply pipe 144, the sludge pressing force between the upper belt 110 and the lower belt 120 is also changed. Cake treatment of sludge having a constant moisture content is not possible, and the problems of lowering the lifespan of these belts 110 and 120 by changing the tension applied to the upper and lower belts 110 and 120 by the change of the sludge pressing force. And, if the sludge supplied to the lower belt contains excessive moisture or if the flow rate of the sludge exceeds the appropriate range, some of the sludge should be off the edge of the belt to reprocess it.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a sludge dewatering apparatus for improving the dewatering function by distributing sludge evenly on a belt.

As a technical configuration for achieving the above object, the present invention, the dispensing tank is supplied to distribute the aggregated sludge to have a set width and thickness, and the sludge discharged from the dispensing tank while being moved on the top 1 In the sludge dewatering device having a lower belt for the purpose of gravity dewatering, and the upper belt is installed in close contact with the lower belt for a certain length to pressurize the sludge secondary pressure, the sludge dewatering device is installed in the distribution tank in the width direction long and several A dehydration tube having two dehydration holes, an elastic wing formed on the outer surface of the dehydration tube in a longitudinal direction and formed in a plurality of circumferential directions, and a dewatering drain pipe connected to one side of the dehydration tube to drain the dehydrated water from the sludge; , Dewatering sludge for sludge characterized in that it comprises a rotary motor for driving the dewatering rotation It depends on the maryeonham.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a front configuration diagram showing the dewatering device for sludge according to the present invention as a whole, the same reference numerals as in Fig. 1 for the same components as the conventional dewatering device shown in Figure 1 and a detailed description thereof are omitted. I would like to.

The sludge pipe 10 installed to supply the sludge to the sludge supply tank 140 has a flow rate control valve 12 for adjusting the sludge flow rate and a flow rate sensor 14 for generating an electrical signal by sensing the flow rate of the sludge. Has In addition, the coagulant pipe 16 installed to supply the polymer coagulant to the sludge supply tank 140 has a supply amount control valve 18 to adjust the supply amount of the coagulant.

The sludge of the sludge supply tank 140 and the coagulant flocculant are agitated by the stirrer 142 and then supplied to the sludge distribution unit 20 through the sludge supply pipe 144, and the sludge distribution unit 20 is shown in FIG. As shown in more detail below, it has a dispensing tank 22 located above the lower belt 120 where gravity dewatering is performed.

As shown in more detail in FIG. 5, the distribution tank 22 is provided in a substantially rectangular plate shape having a width slightly smaller than the width of the lower belt 120 to be positioned above the lower belt 120. The side wall 25A integrally formed to have a predetermined height in a direction perpendicular to the base 24 and to the edge of the remaining portion of the base 24 except for the edge of the rear portion with respect to the advancing direction of the lower belt 120. 25B and 25C. In particular, the base 24 is composed of a front base 24a positioned at the front portion and a rear base 24b positioned at the rear portion with respect to the travel direction of the lower belt 120. The height is set slightly higher than the height of the rear base 24b, and the front base 24a and the rear base 24b are connected by an arcuate connecting portion 24c having an arcuate cross section.

In addition, a rack gear 26 is provided on the sidewalls 25A and 25B of the distribution tank 22 at a portion of the upper end of the portion adjacent to the sidewall 25C connected to the sludge supply pipe 144, and the sidewall 25A ( Guide rails 27 parallel to the rack gear 26 protrude outwardly from the side walls 25A and 25B on the inner surfaces of the surfaces facing each other 25B, and the movable partition 30 is provided on the rails 27. Is installed.

The movable partition wall 30 is formed in a rectangular plate shape and is disposed to be parallel to the side wall 25C. The groove 32 to which the guide rails 27 are fitted is coupled to both left and right sides of the partition wall 30. The guide rail 27 is inserted into the groove 32 to be coupled to the movable partition 30 so as to slide along the guide rail 27 to move in the longitudinal direction of the base 24. The lower end of the movable bulkhead 30 is positioned upwardly away from the upper surface of the front base 24a, and the upper end of the movable bulkhead 30 is about the same height as the upper end of the side walls 25A, 25B, 25C. It is set to have.

In addition, a shaft 34 is formed at an upper end of the movable partition 30 in a direction parallel to the longitudinal direction of the movable partition 30, and is engaged with the rack gear 26 at both ends of the shaft 34. A pinion gear 35 to be mounted is installed, and one end of the shaft 34 receives a moving force in the same direction as the guide rail 27 from the cylinder 36 installed on the side wall 25A.

Then, a hollow cylindrical dewatering tube (shown in FIG. 4) is formed on the upper portion of the arcuate connecting portion 24c, which is a boundary between the front base 24a and the rear base 24b constituting the base 24 of the distribution tank 22. 40 is installed long in the width direction of the distribution tank 22, the dewatering tube 40 is radially penetrated and arranged in several places at regular intervals over the entire area, the diameter of which is only water contained in the sludge Small dehydration hole 42 is provided so as to pass through. Here, the length of the dehydration container 40 is formed to be equal to or slightly smaller than the distance between the side walls 25A and 25B constituting the distribution tank 22. Of course, although only the case where the dehydration hole 42 is formed in the dehydration tube 40 above, the diameter of the dewatering hole 42 is made larger, and the filter layer on the outer surface or the inner surface of the dehydration tube 40. May be formed so that the water passing through the filter layer flows into the dehydration tube 40.

A plurality of wings 44 are provided on the outer surface of the dehydrating barrel 40, the wings 44 are arranged to be continuous along the longitudinal direction of the dehydrating barrel 40 and to be spaced apart at predetermined intervals in the circumferential direction. In addition, the wing 44 is made of a resilient material, it is disposed so that the upper surface of the arc-shaped connection portion 24c slightly interferes on the rotation path of the wing 44.                     

The dehydration container 40 is connected to the rotary motor 41 and driven to rotate. As shown in FIGS. 6 and 7, one end of the dehydration container 40 is sealed by a cover 45. The cover 45 is provided with a rotational force from the rotary motor 41 installed on the side wall 25A of the distribution tank 22, and the other end of the dehydration tube 40 is a dewatering drainage pipe 60 fixed to the side wall 25B. Is rotatably supported. Of course, the bearing 46a and the sealing member 46b are connected between the other end of the dehydrating tube 40 and the connection portion of the dehydrating tube 60, that is, between the inner surface of the dehydrating tube 40 and the outer surface of the dehydrating tube 60. ), The dehydration container 40 is rotatable in a state of maintaining airtightness, and through holes 28A and 28B are formed in the side walls 25A and 25B of the dispersion tank 22, respectively. The rotary motor 41 and the dewatering drainage pipe 60 are installed at the portion.

In addition, each of the cover 45 and the dewatering drainage pipe 60 is provided with shaft supports 51 and 51, and the shaft support 51 mounted to the cover 45 is attached to the cover 45. It is provided so that relative rotation is possible, and the axial support 51 attached to the dehydration drainage pipe 60 is fixedly installed in the dehydration drainage pipe 60. At this time, the dehydration drainage pipe 60 side shaft support 51 is a dehydration drainage pipe 60 via a separate connector 52 so as not to prevent the solution in the dehydration pipe 40 flowing to the dehydration drainage pipe 60 side. Fixed to the connector 52 has a fluid passageway 52a.

The shaft supporter 51 has a central axis 51a formed along a center line of the dehydration container 40, a plurality of connecting rods 51b formed radially long of the central axis 51a, and the connecting table 51b. Consists of a shaft support groove (51c) formed at the end of the bar, the central shaft (51a) of the one shaft support 51 is mounted to the cover 45 so as to be axially rotatable and the center of the other shaft support (51) The shaft 51a is fixed to the connector 52.

In addition, a plurality of brush shafts 54 are installed in the dehydration container 40, and the brush shafts 54 are provided with a brush 55 in a spiral shape, and the predetermined positions of the brush shafts 54 are provided. The gear 56 is mounted, and the thread 40a to which the gear 56 meshes is continuously formed in the circumferential direction on the inner surface of the dewatering container 40. Of course, the brush 55 is a tip of the brush 55 is slightly in contact with the inner surface of the dehydration container 40 to remove the scale (Scale) formed on the inner surface of the dehydration container 40 It should be installed in a state.

FIG. 8 is an exploded perspective view for explaining a configuration in which a sludge width adjusting portion for adjusting the width of sludge discharged from the distribution tank 22 to correspond to the width of the lower belt is provided.

In each of the side walls 25A and 25B constituting the distribution tank 22, one end of the sludge width adjusting plate 70A and 70B can be rotated through the pin 71 at the end of the portion for discharging the sludge to the lower belt. The sludge width adjusting plate 70A, 70B is formed so that its lower end is equal to the bottom height of the side walls 25A and 25B and its upper end is lower than the top height of the side walls 25A and 25B. do.

In addition, the side wall (25A) (25B) is fixed to the cylinder support 72 which traverses the distribution tank 22 in the horizontal direction, the cylinder 73 is mounted to the central portion of the cylinder support (72) bar The rod 73a of the cylinder 73 is disposed so that its forward and backward directions are in the sludge discharge direction, and each end of the plurality of connecting rods 74A and 74B is connected to an end of the rod 73a. The other ends of the connecting rods 74A and 74B are rotatably connected to the upper ends of the free ends of the sludge width adjusting plates 70A and 70B, respectively, via pins 76.

The connection configuration of the rod 73a and the connecting rods 74A and 74B will be described in more detail. At the ends of the connecting rods 74A and 74B, the connector 75 in which a screw thread 75a is formed at a predetermined length on the outer circumferential surface thereof is formed. ) Is integrally fixed, and the connector 75 is rotatably mounted at the end of the rod 73a so that the threads 75a of the connecting rods 74A and 74B are engaged with each other.

In addition, the dewatering drainage pipe 60 is provided with a valve 62 and is connected to a wastewater treatment facility, and a sludge thickness sensor 81 for measuring the sludge thickness of the lower belt 120 includes a lower portion of the lower belt 120. Sludge thickness information, which is mounted on the upper facility frame and measured by the sensor 81, is transmitted to the upper controller 82. In addition, the flow rate sensor 14 installed in the sludge pipe 10 also transmits a flow rate detection value to the upper controller 82, and the valves, motors, cylinders, and the like are operated by the upper controller 82. The upper controller 82 is preprogrammed so that it can be controlled.

The operation of the present invention having the above configuration will be described.

When the apparatus of the present invention is activated for dewatering sludge, the upper and lower belts 110 and 120 are driven, and the sludge containing the water and the polymer coagulant are sludge through the sludge pipe 10 and the coagulant pipe 16, respectively. The sludge and the flocculant introduced into the supply tank 140 are mixed by the stirrer 142 to form a large sludge and are supplied to the sludge distribution tank 20 through the sludge supply pipe 144.

At this time, the rotary motor 41 is rotated to drive the dehydration tank 40 is connected to it, the dehydration hole formed in the dehydration tank 40 is a part of the water contained in the sludge supplied to the sludge distribution tank 20 The dewatering sludge is introduced into the dehydration container 40 through the 42 and is discharged to the wastewater treatment facility through the dehydration drainage pipe 60, and the sludge from which the water is first dehydrated is sludge width adjusting plate 70A and 70B. By the appropriate width is supplied to the upper portion of the lower belt 120 is gravity dewatered.

When the dehydration container 40 is rotated in the above, the inner surface of the dehydration container 40 is cleanly cleaned by the brush 55, and when the dehydration container 40 is rotated, the inside of the dehydration container 40 is rotated. The brush shafts 54 engaged with the threads 40a formed on the surface of the brush shaft 54 are rotated, respectively, so that the foreign matter attached to the inner surface of the dehydrating container 40 is rotated while the brush 55 provided on the brush shaft 54 is rotated. By cleaning them, the deterioration of the dehydration efficiency by the closing of the dehydration hole 42 is prevented.

In addition, the sludge flowing into the sludge supply tank 140 is detected by the flow rate sensor 14 installed in the sludge pipe 10 is continuously transmitted to the upper controller 82, the upper controller 82 ) Controls the apparatus of the present invention as follows in comparison with a preset sludge flow rate.

When the inflow amount of sludge flowing into the sludge supply tank 140 is greater than the preset sludge flow rate, the cylinder 36 is reversed to move the moving partition 30 connected thereto to move away from the side wall 25C of the distribution tank 22. As a result, the sludge temporary retention space formed by the moving partition 30 and the side walls 25A, 25B, and 25C increases, and the sludge that is excessively introduced into the sludge supply tank 140 enters the sidewalls 25A, 25B, and 25C. ) To prevent the discharge to the outside of the distribution tank (22).

On the contrary, if the amount of sludge flowing into the sludge supply tank 140 is smaller than the preset sludge flow rate, the cylinder 36 is advanced to move the movable partition 30 connected to the side wall 25C of the sub-bath 22. The flow rate of the sludge discharged to the lower belt 120 through the lower portion of the moving partition 30 while the temporary sludge retention space formed by the moving partition 30 and the side walls 25A, 25B, and 25C are reduced. Ensure that this is maintained within the appropriate range.

In addition, the width adjustment of the sludge discharged from the distribution tank 22 to the lower belt 120 is performed by the driving of the cylinder 73. When the rod 73a is moved forward and backward by the driving of the cylinder 73, When the connecting rods 74A and 74B installed on the rod 73a are rotated in opposite directions with respect to each other, the sludge width adjusting plates 70A and 70B are rotated so that the free end portions approach each other or rotate in opposite directions. By adjusting the width of the sludge discharged to the lower belt 120 is made.

In addition, the sludge thickness of the upper portion of the lower belt 120 measured by the sludge thickness sensor 81 controls the apparatus of the present invention as described below in comparison with a preset sludge thickness, that is, a sludge thickness having excellent dewatering efficiency.

If the thickness of the sludge mounted on the lower belt 120 is thicker than the predetermined thickness, the opening degree of the valve 62 installed in the dewatering drainage pipe 60 is increased to maximize the amount of water dewatered from the sludge to lower the belt 120. The thickness of the sludge decreases as the amount of water contained in the sludge placed on the shell decreases.

On the contrary, when the thickness of the sludge placed on the lower belt 120 is thinner than the predetermined thickness, the opening degree of the valve 62 installed in the dewatering drainage pipe 60 is reduced to minimize the amount of water dewatered from the sludge to lower the belt ( 120, the thickness of the sludge increases as the amount of water contained in the sludge placed on the sludge increases.

As described above, according to the sludge dewatering apparatus according to the present invention, the width and thickness of the sludge supplied to the upper portion of the lower belt are adjusted to be in a predetermined range, thereby improving the dewatering efficiency.

Claims (4)

Dispensing tank for receiving agglomerated sludge and distributing it to have a set width and thickness, Receiving sludge discharged from the dispensing tank, the lower belt for the first gravity dehydration while moving to the upper state, and the lower belt is in close contact with the predetermined length In the dewatering apparatus for sludge having an upper belt which is installed so as to pressurize and dewater the sludge secondary, The dehydration tank 40 is installed in the distribution tank 22 in the width direction and has a plurality of dehydration holes 42, and is formed long in the longitudinal direction on the outer surface of the dehydration tank 40 and in the circumferential direction. A plurality of elastic wings 44 formed, a dehydration drain pipe 60 is connected to one side of the dehydration tank 40 to drain the dehydrated water from the sludge, and a rotary motor for rotating the dehydration container 40 ( 41) Sludge dewatering device characterized in that it comprises. The shaft supporter 51 of claim 1, wherein both sides of the shaft supporter 51 and the shaft supporter 51 are rotatably mounted on one end of the dewatering container 40 and fixed to the dewatering drainage pipe 60. The brush shaft 54 mounted on the brush shaft 54, the brush 55 formed on the outer surface of the brush shaft 54, and in contact with the inner surface of the dewatering tube 40, and the inner surface of the dewatering tube 40. And a screw (56a) continuously formed in the circumferential direction, and a gear (56) fixed to the brush shaft (54) and mounted to engage the thread (40a). The rack gear 26 formed on upper portions of both sidewalls 25A and 25B of the distribution tank 22, and the pinion gear 35 rolling on the rack gear 26 on both upper ends. ) Is rotatably mounted and is formed to be elongated in the width direction of the dispensing tank 22, and a movable partition 30 disposed at the sludge inlet of the dewatering container 40 such that a lower end thereof falls from the lower portion of the dispensing tank 22. And a cylinder (36) for moving the movable partition (30) in the longitudinal direction of the distribution tank (22). The sludge width adjusting plate (70A) and (70B) rotatably mounted on both sidewalls (25A) (25B) so as to be located in the sludge discharge portion of said distribution tank (22), and said distribution tank (22). ) And one end is hinged to the free end of the sludge width adjusting plate (70A, 70B) and the other end is located at the center of the rod (73a) is installed to operate in the sludge discharge direction Connection rods 74A and 74B which are hinged to the rod 73a of the cylinder 73 and are formed with threads 75a engaged with each other at the end of the hinged portion of the rod 73a are further included. Dewatering device for sludge.

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