Apparatus, for thickening and dehydrating sludge, provided with discharge guide for dehydrated sludge

Abstract

The present invention relates to an apparatus, for thickening and dehydrating sludge, provided with a discharge guide for dehydrated sludge. The present invention is provided with a discharge guide in a collection chamber, in which sludge is held before being discharged through a sludge discharge port, to facilitate smooth discharging of dehydrated sludge.

Description

Sludge thickening dewatering device equipped with a dewatered sludge discharge guide

[0001] The present invention relates to a sludge thickening and dewatering device that dehydrates and thickens sludge while transporting raw water in the direction of gravity opposite to that of gravity, and is capable of resolving problems such as poor brushing of a filter screen and poor discharge of sludge due to uneven gaps between a filter screen and a transport screw.

[0002] The concentrated sludge generated in the sedimentation tank during the water treatment process for wastewater, livestock manure, sewage, and wastewater has a low concentration level, so when it flows into the digestion tank, the digestibility decreases, causing problems throughout the digestion tank.

[0003] In addition, the return water, including sewage and livestock wastewater, which are processed in conjunction, has a large fluctuation in pollutant load, which has a significant impact on the sewage or wastewater treatment process when processed in conjunction.

[0004] Therefore, there is a need to ensure stable treatment throughout the water treatment plant and reduce carbon emissions from the water treatment plant by minimizing the impact of changes in pollutant load and enabling flexible response to changes in treatment volume.

[0005] As a technology related to this, a "sludge separator for wastewater purification" (Korean Utility Model Registration No. 20-0400257, Patent Document 1) invented by the inventor of the present application is disclosed.

[0006] Figure 7 illustrates this patent document 1.

[0007] The above patent document 1 has a wastewater inlet (112) formed on the bottom surface of a body (111) having a storage chamber (111a) opened at the top inside to allow wastewater to flow in, and a storage frame (110) having a plurality of water-retaining plates (113) supported and connected to the inner wall of the storage chamber (111a) is provided.

[0008] In addition, a filter screen (120) is provided on the outer periphery, which is detachably fixedly connected to the upper surface of the storage frame (110), and has a hollow portion (121) formed therein that communicates with the storage chamber (111a) of the storage frame (110), and has a plurality of filter holes (122) through which water is discharged.

[0009] In addition, it is configured to include an installation frame (130) that is detachably fixedly connected to the upper surface of the filter screen (120), has a lower-opened collection chamber (131) formed therein that communicates with the hollow portion (121) of the filter screen (120), and has a sludge discharge port (132) formed on one side of the collection chamber (131) through which sludge is discharged.

[0010] In addition, it is configured to include a collection frame (140) that is fixedly connected to the outer periphery of a storage frame (110) while wrapping around the filtration screen (120), and has a collection chamber (141) formed inside where filtered water passing through the filtration screen (120) is collected, and a filtered water discharge port (142) formed on one side of the collection chamber (141) to discharge the collected filtered water.

[0011] In addition, the method includes a stirring conveying shaft (150) that is formed with a plurality of stirring blades (152) on the lower side of a shaft (151) that is vertically arranged to pass through the interior of the storage frame (110), the filter screen (120), and the installation frame (130) and is rotatably supported and connected to the installation frame (130) to stir the wastewater that has flowed into the storage frame (110), and a conveying screw (153) that guides and discharges the sludge that has flowed into the filter screen (120) to the sludge discharge port (132) of the installation frame (130) on the upper side of the shaft (151) that coincides with the filter screen (120).

[0012] In addition, a driving means (160) is provided, which is configured to include a motor (161) that generates power by rotating the stirring conveying shaft (150) and a reducer (162) that increases and decreases the driving force of the motor (161) and outputs it.

[0013] The above patent document 1 is configured such that wastewater is continuously fed into a sieve and a filter screen through a wastewater inlet of a storage frame, the wastewater is separated into water and sludge by the filter screen, the wastewater fed into the storage frame is stirred by the stirring blade of the stirring conveying shaft, the sludge contained in the wastewater floats to the surface of the water, and the sludge floated to the surface of the water by the conveying screw of the stirring conveying shaft and the sludge filtered by the filtering screen are discharged to the outside through the sludge discharge port of the installation frame, a process that is continuously performed.

[0014] However, the device of Patent Document 1 has the advantage of lower facility investment costs, the ability to adjust the concentration of discharged sludge, low power consumption, easy expansion according to the amount generated, and stable response to changes in influent concentration with a large range of backflow, compared to methods such as a method of adding a coagulant to concentrated sludge, putting it into a U-shaped filter, and concentrating it by rotating a screw, a method of separating sludge and moisture using centrifugal force, a method of concentrating it by discharging moisture downward from a belt, a method of concentrating it by sedimenting sludge using gravity, a method of concentrating it by generating microbubbles and attaching them to the sludge, and then floating them, and an electrolysis method.

[0015] Meanwhile, after using the device of Patent Document 1 for many years, the following problems were identified.

[0016] First, due to various factors such as the lapse of use or manufacturing defects, the filter screen (120) does not form a perfect circle with respect to the shaft, so the scraper damper (154) provided at the end of the transport screw (153) cannot completely scrape and remove the sludge on the inner surface of the filter screen (120), and as a result, there was a problem of malfunction due to the filter screen (120) operating while clogged.

[0017] Secondly, although the sludge discharge port (132) is inclined, there was a problem in that the sludge was not discharged smoothly because the sludge stuck to the surface of the sludge discharge port (132) due to viscosity or other reasons.

[0018] In addition, there was a problem in which the coagulation rate was reduced due to the chemicals added for coagulation not being mixed evenly.

[0019] *Prior art literature*

[0020] (Patent Document 1) KR 20-0400257 (October 27, 2005)

[0021] The sludge thickening and dewatering device of the present invention inherits the technical idea of ​​Patent Document 1, but aims to provide a sludge thickening and dewatering device with further improved operational stability by resolving the problems occurring in Patent Document 1 as described above.

[0022] More specifically, the purpose is to ensure smooth discharge of dehydrated sludge by providing a discharge guide within a collection chamber where sludge, from which moisture has been removed through dehydration treatment, remains before being discharged to a sludge discharge outlet.

[0023] More specifically, the purpose is to connect a pushing member with blades extending toward the center so as to push out sludge to the lower portion of a rotating frame that is connected to the upper shaft and rotates within a collection chamber, thereby allowing the pushing member to push out sludge and ensure smooth discharge through a sludge discharge port.

[0024] Furthermore, the pushing member is rotatably connected to the rotating frame so that sludge around the pushing member can be discharged smoothly.

[0025] In addition, a brush is installed at the end of the conveying screw to remove sludge stuck to the filter screen, and a structure is adopted in which the brush moves variably toward the filter screen using a spring, thereby enabling easy removal of sludge from the filter screen even if a gap occurs between the filter screen and the conveying screw.

[0026] In addition, the shaft is designed to have a structure in which the portion located inside the filter screen can freely move horizontally in the forward, backward, left, and right directions, thereby allowing the transport screw inside the filter screen to move on the inner wall surface of the filter screen, thereby facilitating sludge removal even when the shaft axis and the filter screen are not concentric.

[0027] In order to solve the above-mentioned problem, the sludge thickening and dewatering device equipped with the dewatering sludge discharge guide of the present invention comprises a wastewater inlet (112) formed on the bottom surface of a body (111) having a storage chamber (111a) opened at the top inside, through which wastewater flows, a storage frame (110) having a plurality of water-retaining plates (113) supported and connected to the inner wall of the storage chamber (111a), a hollow portion (121) formed inside and communicating with the storage chamber (111a) of the storage frame (110), a filter screen (120) having a plurality of filter holes (122) through which water is discharged on the outer periphery, and a filter screen (120) having a plurality of filter holes (122) formed inside and through which water is discharged, a filter screen (120) having a plurality of filter holes (122) detachably fixedly connected to the upper surface of the filter screen (120) and communicating with the hollow portion (121) of the filter screen (120) inside, and a lower opening (112) formed inside and communicating with the hollow portion (121) of the filter screen (120) A collecting chamber (131) is formed, and an installation frame (130) having a sludge discharge port (132) formed on one side of the collecting chamber (131) through which sludge is discharged, and a collecting chamber (141) is formed on the outer periphery of a storage frame (110) while wrapping around the filtration screen (120) and inside which filtered water passing through the filtration screen (120) is collected, and a collecting frame (140) having a filtered water discharge port (142) formed on one side of the collecting chamber (141) through which the collected filtered water is discharged, and a wastewater flowing into the storage frame (110) and the filtration screen (120) is stirred while simultaneously discharging sludge caught on the filtration screen (120), and is vertically arranged to pass through the inside of the storage frame (110), the filtration screen (120) and the installation frame (130) and rotates on the installation frame (130). A plurality of stirring blades (152) are formed on the lower side of the shaft (151) that can be supported and coupled to stir the wastewater flowing into the storage frame (110), and a stirring conveying shaft (150) is formed on the upper side of the shaft (151) that matches the filtering screen (120) with a conveying screw (153) that guides and discharges sludge caught on the filtering screen (120) to the sludge discharge port (132) of the installation frame (130).In a sludge concentration and dewatering device comprising a driving means (160) including a motor (161) that rotates the stirring conveying shaft (150) and generates power and a reducer (162) that increases and decreases the driving force of the motor (161) and outputs it, a discharge guide (170) is provided on the inner upper part of the collecting chamber (131), which is configured with a rotating frame (173) that is connected to the shaft (151) and rotates horizontally on the inner upper part of the collecting chamber (131), and a pushing member (174) that is connected to the lower part of the rotating frame (173) and extends downward, so that the pushing member (174) that rotates along the rotating frame (173) pushes out the dehydrated sludge inside the collecting chamber (131).

[0028] In the above configuration, a pressurizing motor (176) is installed on the upper portion of the pushing member (174), and the pushing member (174) is connected to the pressurizing motor (176) so that the pushing member (174) rotates horizontally about the pressurizing motor (176) as an axis.

[0029] In the above configuration, a first cylindrical gear (171) connected to the shaft (151) is installed on the inner upper part of the capturing chamber (131), a second cylindrical gear (172) that is meshed with the first cylindrical gear (171) and rotates horizontally is installed, and the rotation frame (173) is formed in a ring shape, and gear teeth are formed on the inner surface to rotate in mesh with the second cylindrical gear (172).

[0030] In the above configuration, a first brush housing (10) is fastened to an end of the transfer screw (153) along an outer surface of the transfer screw (153), and has a first installation groove (11) formed toward the outside, and a second installation groove (12) formed at the upper and lower inner corners of the first installation groove (11); a plate spring (20) having a rounded shape such that both ends are fitted into the second installation groove (12) while having elasticity toward the outside of the first installation groove (11), and the middle portion is positioned in the first installation groove (11) of the brush housing (10), and is installed along the longitudinal direction of the first brush housing (10); A second brush housing (30) having one side fitted into the first installation groove (11) and fastened to the first brush housing (10), a brush installation groove (31) formed facing outward, and configured to move back and forth by the plate spring (20); a brush (40) having one side inserted into and fastened to the brush installation groove (31) of the second brush housing (30), and the other side protruding outward from the brush installation groove (31) to brush sludge attached to the filter screen (120); and the shaft (151) comprises an upper shaft (50) connected to a motor (161) through the reducer (162) and horizontally rotated by the drive of the motor (161); a lower shaft (51) having a lower side supported on the storage frame (110); It is characterized by comprising a central shaft (60) in which the upper part is connected to the upper shaft (50) and the lower part is connected to the lower shaft (51), but is connected so as to be able to move freely in a horizontal direction by a certain distance with respect to the upper shaft (50) and the lower shaft (51).

[0031] In the above configuration, a guide pin (52) is protruded from the lower outer surface of the upper shaft (50) and the upper outer surface of the lower shaft (51), and a clearance groove (61) is formed in the upper and lower portions of the central shaft (60) facing the upper shaft (50) and the lower shaft (51) into which the upper shaft (50) and the lower shaft (51) are fitted, and the inner diameter of the clearance groove (61) is larger than the outer diameters of the upper shaft (50) and the lower shaft (51), and a pin insertion hole (62) is formed in the clearance groove (61) into which the guide pin (52) is fitted so that it can rotate horizontally by the guide of the guide pin (52), and a separation space (63) is formed on the inner wall surface of the clearance groove (61) of the central shaft (60) spaced apart from the upper shaft (50) and the lower shaft (51), or It is characterized by having bearings installed.

[0032] According to the present invention, a discharge guide is provided in a collection chamber where sludge, from which moisture has been removed by dehydration treatment, remains before being discharged to a sludge discharge outlet, thereby enabling the discharge of dehydrated sludge to be smoothly achieved.

[0033] More specifically, a pushing member with blades extending toward the center is connected to the upper shaft and rotates within the collection chamber to push out sludge, thereby allowing the pushing member to push out the sludge and discharge it smoothly through the sludge discharge port.

[0034] Furthermore, the pushing member is rotatably connected to the rotating frame so that sludge around the pushing member can be discharged smoothly.

[0035] In addition, a brush is installed at the end of the conveying screw to remove sludge stuck to the filter screen, and a structure is adopted in which the brush moves variably toward the filter screen using a spring, so that sludge on the filter screen can be easily removed even if a gap occurs between the filter screen and the conveying screw.

[0036] In addition, the shaft has a structure in which the portion located inside the filter screen can freely move horizontally in the forward, backward, left, and right directions, thereby allowing the transport screw inside the filter screen to move on the inner wall surface of the filter screen, thereby facilitating sludge removal even when the shaft axis and the filter screen are not concentric.

[0037] Fig. 1 is a cross-sectional view showing the overall cross-sectional shape and main features of the sludge thickening and dewatering device of the present invention.

[0038] Figure 2 is an exploded perspective view showing the brush installation structure of the present invention and a perspective view showing the operating state.

[0039] Figure 3 is a perspective view showing an example of the connection structure of the upper and lower shafts and the central shaft in the present invention.

[0040] Fig. 4 is a cross-sectional view showing an example in which a guide pin is made movable in the present invention and the operating state at that time.

[0041] Fig. 5 is a cutaway perspective view showing an example in which a sludge discharge pipe according to the present invention is equipped with a high-pressure nozzle and a mist nozzle.

[0042] Fig. 6 is a cutaway perspective view and a cutaway exploded perspective view showing an example of a mixer in the present invention.

[0043] Figure 7 is an exploded perspective view showing the device of Patent Document 1.

[0044]

[0045] *Detailed explanation of the main symbols in the drawing*

[0046] 10: 1st brush housing, 11: 1st installation home

[0047] 12: Second installation groove, 13: Fixed bolt installation hole

[0048] 20: Leaf spring, 21: First fixing bolt through hole

[0049] 30: Second brush housing, 31: Brush installation home

[0050] 32: Second fixed bolt through hole, 40: Brush

[0051] 41: Brush fixing bolt, 50: Upper shaft

[0052] 51: Lower shaft, 52: Guide pin

[0053] 52a: Pin installation groove, 52b: First spring installation groove

[0054] 52c: Bolt fastening groove, 52d: Second spring installation groove

[0055] 52e: Spring, 52f: Pin through hole

[0056] 52g: Bolt head receiving groove, 52h: Step

[0057] 53: Guide bolt, 53a: Bolt body

[0058] 53b: Bolt head, 60: Center shaft

[0059] 61: free play groove, 62: pin insertion hole

[0060] 63: Separation space, 70: Sludge discharge pipe

[0061] 71: Floor surface, 72: Wall surface

[0062] 73: Cover, 80: High pressure nozzle

[0063] 81: Mist nozzle, 90: Mixer

[0064] 91: 1st housing, 91a: drug inlet

[0065] 92: Guide installation plate, 92a: Cutting hole

[0066] 92b: 1st guide plate, 93: 2nd housing

[0067] 93a: Second guide plate, 93b: Connecting member

[0068] 93c: 1st flange section, 93d: 2nd flange section

[0069] 110: Reservoir frame, 111: Body

[0070] 111a: Retention chamber, 112: Wastewater inlet

[0071] 113: Water level plate, 120: Filter screen

[0072] 121: hollow part, 122: filter hole

[0073] 131: collection chamber, 132: sludge discharge port

[0074] 140: collection frame, 141: collection chamber

[0075] 142: Filtered water discharge port, 150: Stirring conveying shaft

[0076] 151: shaft, 152: stirring blade

[0077] 153: Transfer screw, 153a: Housing insertion groove

[0078] 153b: Slope, 153c: Fixing bolt installation groove

[0079] 160: driving means, 161: motor

[0080] 162: Reducer, 170: Exhaust guide

[0081] 171: First cylindrical gear, 172: Second cylindrical gear

[0082] 173: Rotating frame, 174: Pushing member

[0083] 175: Rotating shaft, 176: Pressurizing motor

[0084] As shown in Fig. 1, the sludge thickening and dewatering device of the present invention has a wastewater inlet (112) formed on the bottom surface of a body (111) having a storage chamber (111a) with an open upper side to allow wastewater to flow in, and a storage frame (110) having a plurality of water-retaining plates (113) supported and connected thereto is provided on the inner wall of the storage chamber (111a).

[0085] In addition, a filter screen (120) is provided that is detachably fixedly connected to the upper surface of the storage frame (110), has a hollow portion (121) formed inside that communicates with the storage chamber (111a) of the storage frame (110), and has a plurality of filter holes (122) provided on the outer periphery through which water is discharged.

[0086] In addition, an installation frame (130) is provided that is detachably fixedly connected to the upper surface of the filter screen (120), has a lower-opened collection chamber (131) formed therein that communicates with the hollow portion (121) of the filter screen (120), and has a sludge discharge port (132) formed on one side of the collection chamber (131) through which sludge is discharged.

[0087] In addition, a collecting frame (140) is provided that surrounds the filtration screen (120) and is fixedly connected to the outer periphery of the storage frame (110), and has a collecting chamber (141) formed inside where the filtered water passing through the filtration screen (120) is collected, and a filtered water discharge port (142) formed on one side of the collecting chamber (141) to discharge the collected filtered water.

[0088] In addition, a plurality of stirring blades (152) are formed on the lower side of a shaft (151) that is vertically arranged to pass through the interior of the storage frame (110), the filter screen (120), and the installation frame (130) and is rotatably supported and connected to the installation frame (130) to stir the wastewater that has flowed into the storage frame (110), and an agitating conveying shaft (150) is provided on the upper side of the shaft (151) that coincides with the filtering screen (120) to guide and discharge the sludge that has flowed into the filtering screen (120) to the sludge discharge port (132) of the installation frame (130).

[0089] In addition, a driving means (160) is provided, which includes a motor (161) that rotates the stirring conveying shaft (150) and generates power, and a reducer (162) that increases or decreases the driving force of the motor (161) and outputs it.

[0090] The above configuration is disclosed in Patent Document 1, and the overall components, connection relationships, and operational relationships of the present invention are inherited from Patent Document 1.

[0091] However, as described above, in Patent Document 1, the filter screen (120) does not form a perfect circle with respect to the shaft, so the scraper damper (154) provided at the end of the conveying screw (153) does not completely scrape and remove the sludge on the inner surface of the filter screen (120), and thus, there was a problem of malfunction due to the filter screen (120) operating while blocked, and there was a problem of sludge not being discharged smoothly due to sticking to the surface of the sludge discharge port (132), and there was a problem of the coagulation rate being lowered due to the chemical added for sludge coagulation not being evenly mixed. Hereinafter, the main configuration and operating relationship of the present invention for resolving these problems will be described.

[0092] The present invention is characterized in that a discharge guide (170) is provided inside the collection chamber (131) so that sludge inside the collection chamber (131) can be easily discharged to the sludge discharge port (132).

[0093] The discharge guide (170) for this purpose is located at the inner upper part of the collection chamber (131) as shown in Fig. 1, and is composed of a rotating frame (173) that is connected to the shaft (151) and rotates horizontally at the inner upper part of the collection chamber (131), and a pushing member (174) that is connected to the lower part of the rotating frame (173) and extends downward.

[0094] This configuration allows the dehydrated sludge inside the collection chamber (131) to be smoothly discharged by the pushing member (174) that rotates along the rotating frame (173).

[0095] If the configuration that allows the rotating frame (173) to rotate is described in more detail through the drawing, a first cylindrical gear (171) connected to the shaft (151) is installed on the inner upper part of the collecting chamber (131), and a second cylindrical gear (172) that rotates horizontally while meshing with the first cylindrical gear (171) is installed, and the rotating frame (173) is formed in a ring shape, and gear teeth are formed on the inner circumferential surface to mesh with the second cylindrical gear (172) and rotate.

[0096] At this time, a pressure motor (176) is installed on the upper portion of the pushing member (174), and the pushing member (174) can be configured to be connected to the pressure motor (176) so that the pushing member (174) rotates horizontally with the pressure motor (176) as an axis.

[0097] This configuration can ensure smooth discharge while minimizing the resistance applied to the pushing member (174) according to the degree of sludge dehydration as the pushing member (174) rotates along the rotating frame (173) by the operation of the pressurizing motor (176).

[0098] For example, when the resistance applied when moving the pushing member (174) to a state perpendicular to the rotating frame (173) is large, the pushing member (174) is moved in a state where it is rotated parallel to the rotating frame (173) to minimize the resistance, and the angle is gradually increased until it reaches a state of being perpendicular, thereby enabling smooth discharge.

[0099] In this state, if the pushing member (174) is rotated at high speed and moved along the rotating frame (173), the dewatered sludge to be discharged can be discharged without hardening, thereby enabling subsequent processes to proceed smoothly.

[0100] In addition to guiding the discharge of dewatered sludge from the collection chamber, a brush (40) is provided instead of a scraper damper (154) like that of Patent Document 1, but the brush (40) can be configured to move flexibly in the forward and backward directions based on the shaft (151) at the end of the transfer screw (153).

[0101] For this purpose, it is composed of a first brush housing (10), a plate spring (20), a second brush housing (30), and a brush (40).

[0102] The first brush housing (10) is fastened to the end of the transfer screw (153) along the outer circumferential surface of the transfer screw (153) as shown in Fig. 1.

[0103] A first installation groove (11) is formed on the inside of the first brush housing (10) facing outward, and a second installation groove (12) is formed on the upper and lower inner corners of the first installation groove (11).

[0104] The plate spring (20) has elasticity toward the outside of the first installation groove (11), and both ends are fitted into the second installation groove (12), and the middle portion takes a round shape so that it is positioned in the first installation groove (11) of the brush housing (10), and is installed along the length direction of the first brush housing (10).

[0105] The second brush housing (30) is fastened to the first brush housing (10) by having one side fitted into the first installation groove (11), and has a brush installation groove (31) formed facing outward, and is configured to be able to move forward and backward by the plate spring (20).

[0106] The brush (40) is inserted and fastened on one side into the brush installation groove (31) of the second brush housing (30), and the other side protrudes outward from the brush installation groove (31) to brush sludge attached to the filter screen (120).

[0107] Figure 2 illustrates these configurations and operational relationships in more detail.

[0108] Looking at the drawing, a housing insertion groove (153a) is formed along the outer surface of the transfer screw (153) on the end wall surface of the transfer screw (153), and a fixing bolt installation groove (153c) having screw threads formed on the inner surface of the inner wall surface of the housing insertion groove (153a) is formed.

[0109] At this time, the upper and lower parts of the housing insertion groove (153a) are configured as inclined portions (153b) so that the width becomes narrower inward as shown in the drawing, so that the first brush housing (10) can be forcibly fitted.

[0110] In addition, the first brush housing (10) is installed with one side fitted into the housing insertion groove (153a), and a fixing bolt installation hole (13) having a screw thread on the inner surface and in a straight line with the fixing bolt installation groove (153c) is formed on the inner wall surface of the first installation groove (11).

[0111] In addition, a first fixing bolt through-hole (21) is formed in a straight line with the first fixing bolt through-hole (13) in the above-mentioned plate spring (20), and a second fixing bolt through-hole (32) is formed in a straight line with the first fixing bolt through-hole (21) in the inner wall surface of the brush installation groove (31) of the above-mentioned second brush housing (30).

[0112] In addition, the outer surface of the bolt body end has threads formed to screw-connect with the threads of the above-mentioned fixed bolt installation groove (153c) and the threads of the above-mentioned fixed bolt installation hole (13), and the middle portion of the bolt body is provided with a brush fixing bolt (41) that passes through the first fixed bolt through-hole (21) and the second fixed bolt through-hole (32) and has the bolt head caught on the inner wall surface around the second fixed bolt through-hole (32) to limit the range of movement of the second brush housing (30).

[0113] At this time, a hole may be machined on the inside of the brush (40) to allow the bolt body of the brush fixing bolt (41) to pass through.

[0114] According to the above configuration, the first brush housing (10) is forcibly inserted into the housing insertion groove (153a) of the transfer screw (153) and then installed by screwing the brush (40), the second brush housing (30) and the plate spring (20) through the brush fixing bolt (41) into the fixing bolt installation hole (13) and the fixing bolt installation groove (153c) of the first brush housing (10).

[0115] When tightening the bolt, the second brush housing (30) is tightened appropriately to the extent that it can move back and forth in and out by the plate spring (20).

[0116] This allows the brush (40) to move elastically back and forth at the end of the transfer screw (153), thereby cleaning the surface of the filter screen (120) that is not completely circular.

[0117] At this time, when the brush (40), plate spring (20), second brush housing (30), etc. are divided into several units rather than being formed as one unit along the circumference of the transfer screw (153), the forward and backward movements according to the section operate individually, so that the surface brushing of the filter screen (120) is smoothly performed.

[0118] In addition, if brushing is not smooth during use, more smooth brushing can be achieved by varying the degree of tightening of the brush fixing bolt (41).

[0119] In addition, in configuring the shaft (151), the shaft (151) may be divided into an upper shaft (50) that is connected to a motor (161) through the reducer (162) and rotates horizontally by driving the motor (161), a lower shaft (51) whose lower part is supported by the reservoir frame (110), and a central shaft (60) whose upper part is connected to the upper shaft (50) and whose lower part is connected to the lower shaft (51).

[0120] At this time, the central shaft (60) is characterized in that it is connected to the upper shaft (50) and lower shaft (51) so that it can move freely a certain distance in the horizontal direction.

[0121] In particular, it is preferable that this central shaft (60) is a part to which a transfer screw (153) located inside the filter screen (120) is connected.

[0122] The configuration for enabling the central shaft (60) to move horizontally relative to the upper shaft (50) and the lower shaft (51) can utilize various known joints such as universal joints.

[0123] Figure 3 illustrates the configuration for achieving this most simply.

[0124] Looking at the drawing, a guide pin (52) protrudes from each of the lower outer surface of the upper shaft (50) and the upper outer surface of the lower shaft (51).

[0125] In addition, the central shaft (60) has a clearance groove (61) formed at the upper and lower portions facing the upper shaft (50) and lower shaft (51) into which the upper shaft (50) and lower shaft (51) are fitted, and the inner diameter of the clearance groove (61) is larger than the outer diameter of the upper shaft (50) and lower shaft (51).

[0126] In this clearance groove (61), a pin insertion hole (62) is formed so that when the upper shaft (50) rotates by inserting the guide pin (52) into the guide pin (52), the central shaft (60) rotates horizontally together with the guide pin (52).

[0127] In addition, the inner wall surface of the clearance groove (61) of the central shaft (60) is formed with a spaced apart portion (63) separated from the upper shaft (50) and the lower shaft (51), or a bearing is installed.

[0128] In this configuration, the upper shaft (50) and the lower shaft (51) are each firmly supported by a reducer or installation frame (130) and a storage frame (110) to prevent horizontal movement, while the central shaft (50) is enabled to flow in the horizontal direction by a clearance groove (61), thereby providing an operation in which the brush (40) is supported on the filter screen (120) and freely floats while rotating horizontally.

[0129] Looking at the cross-sectional drawing of Fig. 3, the upper side shows a state in which the central shaft (50) forms a concentric circle with the upper shaft (50) and the lower shaft (51), and the lower side shows a state in which the central shaft (50) moves freely without forming a concentric circle.

[0130] In this case, it can be seen that even if the filter screen (120) does not form a concentric circle, the brushing of the brush (40) can move through the space of the margin to brush the filter screen (120).

[0131] The flow of the above-mentioned central shaft (60) is generated by centrifugal force due to the guide of the guide pin (52), but if the rotation speed is fast, excessive force may be applied to the brush (40) or the transfer screw (153), which may cause damage.

[0132] Alternatively, excessive force may be applied to the filter screen (120), which may result in deformation of the filter screen (120).

[0133] As a measure to prevent such problems from occurring, the guide pin (52) can be configured to move forward and backward to absorb shock.

[0134] Figure 4 specifically illustrates the configuration for this.

[0135] Looking at the drawing, a pin installation groove (52a) is formed at the position where the guide pin (52) of the upper shaft (50) and lower shaft (51) is installed, and a first spring installation groove (52b) is formed on the inner circumference of the pin installation groove (52a), and a bolt fastening groove (52c) having a screw thread formed on the inner circumference is formed on the inner center of the pin installation groove (52a).

[0136] At this time, a pin penetration hole (52f) is formed in the longitudinal direction at the center of the guide pin (52), and a second spring installation groove (52d) is formed around the inner end of the guide pin (52).

[0137] In addition, a spring (52e) is installed between the guide pin (52) and the inner surface of the pin installation groove (52a), and both ends of the spring (52e) are guided by being fitted into the first spring installation groove (52b) and the second spring installation groove (52d), respectively.

[0138] Meanwhile, a bolt head receiving groove (52g) having a certain depth and an inner diameter larger than that of the pin through hole (52f) is formed at the outer center of the guide pin (52), thereby forming a step (52h) at the boundary with the pin through hole (52f).

[0139] In addition, a screw thread is formed on the outer surface of the end of the bolt body (53a) to be screwed into the bolt fastening groove (52c), and the middle part of the bolt body (53a) passes through the pin penetration hole (52f), and a guide bolt (53) is provided that is variably supported on a step (52h) while the bolt head (53b) is accommodated in the bolt head accommodation groove (52g).

[0140] This configuration allows the central shaft (60) to rotate horizontally simply by the guide of the guide pin (52) and to move horizontally by centrifugal force the distance of the clearance groove (61), and to have elasticity through the spring (52e), thereby dispersing the force applied to the filter screen (120) and suppressing deformation of the filter screen (120).

[0141]

[0142] Meanwhile, it is preferable that a sludge discharge pipe (70) is installed at an angle in the sludge discharge port (132), and that the sludge discharge pipe (70) is each equipped with a nozzle that sprays high-pressure water and mist-like water.

[0143] More specifically, high-pressure water is sprayed on both side walls to provide discharge pressure to the sludge, and mist-like water is sprayed on the bottom surface to form a water film to minimize friction.

[0144] In particular, it is structured to suppress moisture evaporation through the cover (73), thereby suppressing evaporation of a small amount of water sprayed on the bottom surface (71), thereby enabling the water film to be maintained smoothly.

[0145] The configuration for this is specifically illustrated in Fig. 5.

[0146] Looking at the drawing, a sludge discharge pipe (70) is installed in the sludge discharge port (132) above, which extends downwards in a slanted manner with one end connected to the sludge discharge port (132), and which is composed of a bottom surface (71), wall surfaces (72) on both sides of the bottom surface (71), and a cover (73) connecting the wall surfaces (72) on both sides.

[0147] At this time, high-pressure nozzles (80) are installed at regular intervals on the inner side of the above-mentioned side walls (72) of the above-mentioned sludge discharge pipe (70) and spray high-pressure water toward the opposite side wall (72), and mist nozzles (81) are installed at regular intervals on the above-mentioned cover (73) and spray water in the form of mist toward the bottom surface (71).

[0148] Each nozzle is connected to an external water source through a pipe, and each has a pump installed on the pipe, and is configured to supply high-pressure and low-pressure water, respectively.

[0149] Meanwhile, a mixer (90) is provided for mixing chemicals to coagulate wastewater. Compared to a conventionally known general mixer, it has a simple configuration to ensure desirable mixing of chemicals.

[0150] Fig. 1 schematically illustrates such a mixer (90).

[0151] As shown in the drawing, a mixer (90) for mixing wastewater and chemicals is connected to the wastewater inlet (112) through a pipe, and the mixer (90) has a pipe shape that connects the pipe through which wastewater flows in and the pipe connected to the wastewater inlet (112) in a straight line, and a chemical inlet (91a) for injecting chemicals is formed on one side, and two first guide plates (92b) are installed in front of the chemical inlet (91a) and are arranged to be inclined in a direction facing each other, and a second guide plate (93a) for blocking the center of the pipe is installed in front of the two first guide plates (92b), and the inner diameter between the first guide plate (92b) and the second guide plate (93a) is characterized in that it is larger than the inner diameter of the adjacent pipe.

[0152] A more specific configuration is illustrated in Fig. 6.

[0153] Looking at the drawing, the mixer (90) is composed of a first housing (91), a guide installation plate (92), and a second housing (92).

[0154] The first housing (91) has the same inner diameter as the pipe into which the wastewater flows and is connected in a straight line, and has a tubular shape in which a chemical injection port (91a) connected to a chemical injection device on one side is connected at an angle with respect to the direction of travel, and a flange portion for pipe connection is formed on the end side, and an installation groove (91b) is formed on the outer circumference of the flange portion.

[0155] The guide installation plate (92) is shaped like a plate whose circumference fits into the installation groove (91b), and has a cut hole (92a) formed in a direction facing each other in the center, and has a first guide plate (92b) that is bent at an angle so that the two facing walls of the cut hole (92a) are symmetrical to each other.

[0156] The second housing (93) is provided with a first flange portion (93c) on one side thereof, and is bolted to the flange portion of the first housing (91) while being abutted against it, and has an inner diameter larger than that of the first housing (91), and the end of the first flange portion (93c) is configured to abut against the surface of the guide installation plate (92) to prevent the guide installation plate (92) from coming off, and a second flange portion (93d) is provided at the end of the first flange portion (93c) and is bolted to the flange portion of the pipe connected to the wastewater inlet (112), and a second guide plate (93a) is installed in the center of the second flange portion (93d) and is spaced apart from the inner surface through a connecting member (93b).

[0157] In the mixer (90) of the above configuration, when the chemical is supplied to the pipe, the wastewater flows into the second housing (93) by forming a vortex by the first guide plate (92b), thereby promoting mixing with the chemical. Then, the straight flow is suppressed by the second guide plate (93a), and the wastewater flows again by forming a vortex toward the outer region, thereby effectively achieving a chemical mixing rate.

[0158] In particular, after separating the two housings, the guide installation plate (92) is taken out and the first guide plate (92b) is forcibly bent to adjust the inclination angle, making it possible to easily control the flow according to the field situation.

[0159] As described above, the present invention can smoothly discharge sludge within a collection chamber through a discharge guide (170), and the brush (40) that moves forward and backward and the central axis (60) that moves freely in the horizontal direction allow smooth brushing of the surface of a filter screen (120) that is not concentric or is deformed, and not only does the mixing of chemicals occur smoothly, but also sludge discharge is facilitated, thereby eliminating defects that occur in the past.

[0160] The present invention can be applied to the concentration and dewatering process of sludge generated during the treatment of various wastewaters, such as domestic wastewater and livestock wastewater.

Claims

1. A wastewater inlet (112) is formed on the bottom surface of a body (111) having a storage chamber (111a) opened at the top inside, through which wastewater flows in, and a storage frame (110) having a plurality of water-retaining plates (113) supported and connected to the inner wall of the storage chamber (111a), a hollow portion (121) is formed inside the storage chamber (111a) of the storage frame (110) and is detachably fixedly connected to the upper surface of the storage frame (110), and a filter screen (120) having a plurality of filter holes (122) through which water is discharged is formed on the outer periphery, and a collection chamber (131) is detachably fixedly connected to the upper surface of the filter screen (120) and is opened at the bottom inside the filter screen (120) and is connected to the hollow portion (121) of the filter screen (120), and the collection chamber (131) is formed. An installation frame (130) having a sludge discharge port (132) formed on one side through which sludge is discharged, and a water collection chamber (141) formed inside the water collection chamber (141) that surrounds the filtration screen (120) and is fixedly connected to the outer periphery of the storage frame (110) and collects the filtered water that has passed through the filtration screen (120), and a water collection frame (140) having a filtered water discharge port (142) formed on one side of the water collection chamber (141) through which the collected filtered water is discharged, and a shaft (151) that is vertically arranged to pass through the inside of the storage frame (110), the filtration screen (120), and the installation frame (130) and is rotatably supported and connected to the installation frame (130) and is connected to the storage frame (110). A stirring conveying shaft (150) having a plurality of stirring blades (152) formed to stir the introduced wastewater, and a conveying screw (153) formed on the upper side of a shaft (151) that matches the filtering screen (120) to guide and discharge sludge caught on the filtering screen (120) to the sludge discharge port (132) of the installation frame (130),In a sludge thickening and dewatering device, comprising: a driving means (160) including a motor (161) that rotates the stirring conveying shaft (150) and generates power; and a reducer (162) that increases and decreases the driving force of the motor (161) and outputs it; On the inner upper part of the above-mentioned capturing chamber (131), there is a rotating frame (173) that is connected to the shaft (151) and rotates horizontally on the inner upper part of the capturing chamber (131), The lower part of the above rotating frame (173) is provided with a discharge guide (170) composed of a pushing member (174) that is connected to extend downward. It is characterized in that the dehydrated sludge inside the collection chamber (131) is pushed out by a pushing member (174) that rotates along a rotating frame (173). Sludge thickening and dewatering device equipped with a dewatering sludge discharge guide.

2. In paragraph 1, A pressurizing motor (176) is installed on the upper portion of the pushing member (174), and the pushing member (174) is connected to the pressurizing motor (176) so that the pushing member (174) rotates horizontally with the pressurizing motor (176) as an axis. Sludge thickening and dewatering device equipped with a dewatering sludge discharge guide.

3. In paragraph 2, A first cylindrical gear (171) connected to the shaft (151) is installed on the inner upper part of the above-mentioned capturing chamber (131). A second cylindrical gear (172) that rotates horizontally while meshing with the first cylindrical gear (171) is installed, The above rotating frame (173) is formed in a ring shape and has gear teeth formed on the inner surface to rotate in mesh with the second cylindrical gear (172). Sludge thickening and dewatering device equipped with a dewatering sludge discharge guide.

4. In paragraph 1, A first brush housing (10) that is fastened to the end of the transfer screw (153) along the outer surface of the transfer screw (153) and has a first installation groove (11) formed toward the outside, and a second installation groove (12) formed on the upper and lower inner corners of the first installation groove (11); A plate spring (20) having a rounded shape so that both ends are fitted into the second installation groove (12) while having elasticity toward the outside of the first installation groove (11) and the middle portion is positioned in the first installation groove (11) of the brush housing (10), and is installed along the length direction of the first brush housing (10); A second brush housing (30) having one side fitted into the first installation groove (11) and fastened to the first brush housing (10), a brush installation groove (31) formed facing outward, and configured to be moved forward and backward by the plate spring (20); A brush (40) is provided, one side of which is inserted and fastened into the brush installation groove (31) of the second brush housing (30) and the other side of which protrudes outward from the brush installation groove (31) to brush the sludge attached to the filter screen (120). The above shaft (151) is An upper shaft (50) connected to a motor (161) through the above reducer (162) and rotating horizontally by the drive of the motor (161); A lower shaft (51) supported by the lower reservoir frame (110); It is characterized in that it is composed of a central shaft (60) which is connected to the upper shaft (50) and the lower shaft (51) and is connected so as to be able to move freely in a horizontal direction by a certain distance with respect to the upper shaft (50) and the lower shaft (51). Sludge thickening and dewatering device equipped with a dewatering sludge discharge guide.

5. In paragraph 4, A guide pin (52) is protruded from each of the lower outer surface of the upper shaft (50) and the upper outer surface of the lower shaft (51). The central shaft (60) above has a clearance groove (61) formed at the upper and lower portions facing the upper shaft (50) and the lower shaft (51) into which the upper shaft (50) and the lower shaft (51) are fitted, and the inner diameter of the clearance groove (61) is larger than the outer diameter of the upper shaft (50) and the lower shaft (51). In the above clearance groove (61), a pin insertion hole (62) is formed so that the guide pin (52) is inserted and rotates horizontally by the guide of the guide pin (52). The inner wall surface of the clearance groove (61) of the central shaft (60) is characterized in that a separation space (63) is formed spaced apart from the upper shaft (50) and the lower shaft (51), or a bearing is installed. Sludge thickening and dewatering device equipped with a dewatering sludge discharge guide.

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