LU101486B1

LU101486B1 - Sewage treatment device for urban rivers

Info

Publication number: LU101486B1
Application number: LU101486A
Authority: LU
Inventors: Tao Ge
Original assignee: Univ Anhui Sci & Technology
Priority date: 2019-10-23
Filing date: 2019-11-18
Publication date: 2021-01-11
Also published as: CN110655216B; CN110655216A

Abstract

The present invention relates to the field of sewage treatment, and discloses a sewage treatment device for urban rivers. The sewage treatment device includes a sedimentation tank provided with a sludge discharge pipe, a sludge discharge mechanism is disposed in the sedimentation tank, the sludge discharge mechanism includes a transversely arranged sludge storage pipe and two sludge guide plates, an upper side wall of the sludge storage pipe is provided with a sludge inlet that extends in the length direction of the sludge storage pipe and has an upward opening, lower ends of the two sludge guide plates are fixed on both sides of the sludge inlet respectively, a sludge blocking pipe which is coaxial with the sludge storage pipe and can rotate is inserted in a side wall of the sludge storage pipe, and a side wall of the sludge blocking pipe is provided with a sludge port capable of matching the sludge inlet; the sludge discharge mechanism also includes a sludge scraping plate which is disposed in the sludge storage pipe and can move in the length direction of the sludge storage pipe, and the sludge scraping plate is provided with a pull rod capable of extending out of the sludge discharge pipe. According to the present invention, by designing a lower portion of the sedimentation tank into a special sludge sedimentation and sludge discharge structure, the sludge at the lower portion of the sedimentation tank can be discharged more comprehensively, and an ideal sludge discharge effect is achieved.

Description

SEWAGE TREATMENT DEVICE FOR URBAN RIVERS LU101486

TECHNICAL FIELD

[0001] The present invention relates to the field of sewage treatment, and in particular to a sewage treatment device.

BACKGROUD

[0002] Sewage treatment processes are a variety of economical, reasonable, scientific and effective processes and methods for treatment of urban domestic sewage and industrial wastewater. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical, catering and other fields. The urban sewage treatment process should be determined as a preference according to the treatment scale, water quality characteristics, environmental functions of the receiving water body and local actual conditions and requirements, after a comprehensive technical and economic comparison.

[0003] The general sewage treatment process includes steps of water inflow, aeration, sedimentation, drainage, and the like, where the precipitation step is generally carried out by using a sedimentation tank, mainly to achieve separation of sludge and water, and the separated water and sludge are recovered and reused. At present, the sedimentation tanks generally use the bottom to collect sludge and discharge the sludge through a sludge discharge pipe disposed at the bottom of the sedimentation tank. It is difficult to separate sludge and water during the actual sludge discharge process, the sludge easily accumulates at a mud outlet and it is difficult to discharge the sludge out of the sludge outlet, so that the sludge discharge effect is not ideal, and it is difficult to discharge the sludge comprehensively.

SUMMARY

[0004] The present invention provides a sewage treatment device for urban rivers in view of the problems existing in the sewage treatment process in the prior art.

[0005] In order to solve the above technical problems, the present invention is implemented by the following technical solution:

[0006] a sewage treatment device for urban rivers, including a sedimentation tank provided with a sludge discharge pipe, where an upper portion of the sedimentation tank is provided with a water inlet pipe, a sludge discharge mechanism connected to the sludge discharge pipe is disposed in the sedimentation tank, the sludge discharge mechanism includes a transversely 1 arranged sludge storage pipe and two sludge guide plates inclined downwards, one end of the sludge storage pipe is fixed to an inner side wall of the sedimentation tank, the other end 44101486 connected to the sludge discharge pipe, an upper side wall of the sludge storage pipe is provided with a sludge inlet that extends in the length direction of the sludge storage pipe and has an upward opening, lower ends of the two sludge guide plates are fixed on both sides of the sludge inlet respectively, a sludge blocking pipe which is coaxial with the sludge storage pipe and can rotate is inserted in a side wall of the sludge storage pipe, and a side wall of the sludge blocking pipe is provided with a sludge port capable of matching the sludge inlet; the sludge discharge mechanism also includes a sludge scraping plate which is disposed in the sludge storage pipe and can move in the length direction of the sludge storage pipe, and the sludge scraping plate is provided with a pull rod capable of extending out of the sludge discharge pipe.

[0007] The sedimentation of the sludge is realized through the sludge storage pipe, the sludge after the sedimentation is first stored in the sludge storage pipe, and then pulled out through the sludge scraping plate to avoid the blockage caused by the accumulation of the sludge at an outlet of the sludge discharge pipe, and the sludge can be discharged comprehensively to achieve a better sludge discharge effect.

[0008] Preferably, the sludge scraping plate includes a sliding plate and a rotating plate each composed of two sector plates, the sliding plate and the rotating plate can be constructed together into a circular plate with an outer side wall in clearance fit with the an inner wall of the sludge storage pipe, the rotating plate is fixed to an end of the pull rod, the sliding plate sleeves the pull rod and is located between the rotating plate and an end of the pull rod extending out of the sludge discharge pipe, an inner wall of the sludge storage pipe is provided with a limiting chute disposed in the length direction of the sludge storage pipe, two arc-shaped surfaces of the sliding plate are each provided with a limiting bump capable of sliding in the limiting chute, an | 25 arc-shaped surface of the rotating plate is provided with a clamping pin capable of completely retracting into the rotating plate, and an inner wall of the sludge storage pipe is provided with two clamping grooves matching the clamping pin.

[0009] Preferably, the arc-shaped surface of the rotating plate is provided with an | accommodating groove completely accommodating the clamping pin, the clamping pin is disposed in the accommodating groove and connected to a bottom surface of the accommodating groove through a spring, the clamping pin can extend out of the accommodating groove under the action of the spring, an outer side wall of the extending end of the clamping pin is provided with a first inclined guide surface, and a side wall at an opening of the clamping groove is provided with a second inclined guide surface which matches the first 2 inclined guide surface to allow the clamping pin to be clamped into or released from the clamping groove. LU101486

[0010] Preferably, the pull rod is further provided with a connecting rod connected to the sludge blocking pipe, an inner side wall of the sludge storage pipe is provided with an arc-shaped chute for the connecting rod to slide, one end of the connecting rod is fixed to an outer side wall of the pull rod, and the other end passes through the arc-shaped chute and is fixed on an outer side wall of the sludge blocking pipe. The pull rod controls the sludge blocking pipe and the sludge scraping plate simultaneously, the final sludge discharge efficiency is improved effectively, and simultaneous control is performed through the pull rod, which is simple and convenient.

[0011] Preferably, the two clamping grooves are disposed at a lower vertex and a left vertex of the sludge storage pipe respectively; when the clamping pin is clamped into the clamping groove at the lower vertex of the sludge storage pipe, the rotating plate is perpendicular to the length direction of the sliding plate to construct together a circular plate, and the sludge inlet is in a state of being closed by the sludge blocking pipe; when the clamping pin is clamped into the clamping groove at the left vertex of the sludge storage pipe, the rotating plate is parallel to the length direction of the sliding plate, and the sludge inlet and the sludge port are relatively in an open state.

[0012] Preferably, an end face of the dredge pipe is provided with a sludge blocking cover, the end of the pull rod extending out of the dredge pipe passes through the sludge blocking cover, and a handle is fixed at the end; the handle is provided with a rotation indicating arrow, and the sludge blocking cover is provided with an opening indicating arrow and a closing indicating arrow which match the indicating arrow on the handle and are used to indicate an opening and closing state of the sludge port.

[0013] Preferably, an end face of the sludge discharge pipe is provided with an insertion groove, the sludge blocking cover is provided with an insertion column capable of being inserted in the insertion groove, and the sludge blocking cover is connected to the sludge discharge pipe by inserting the insertion column into the insertion groove. A mode of installation of the sludge blocking cover makes it very convenient to install and unload the sludge blocking cover, and at the same time, the sludge blocking cover is circumferentially limited, so that the sludge blocking cover can accurately indicate the opening and closing state of the sludge port.

[0014] Preferably, a plurality of drain pipes arranged horizontally and arranged parallel to each other in the same horizontal plane are disposed in the sedimentation tank, the drain pipes 3 are disposed on upper portions of the sludge guide plates, a plurality of drain holes are evenly disposed at pipe walls of the drain pipes, one end of each of the drain pipes is fixed to an inne}-U101486 side wall of the sedimentation tank, the other end extends out of a side wall of the sedimentation tank and the extending ends are connected by a main water pipe, and the main water pipe is connected to a water outlet pipe. The drain pipe drains water in a manner of introducing water passing the drain holes to the main water pipe for drainage, the whole drainage process is moderated, sludge deposited on the lower portion of the sedimentation tank is not stirred, which achieves the sludge and water separation in the true sense.

[0015] Preferably, an end of the water outlet pipe provided with a water outlet valve and away from the main water pipe is connected to a backwashing water pump. The backwashing water pump is configured to flush the drain pipe, the sludge guide plate, the sludge storage pipe, and the like in the sediment for the next use of the sedimentation tank. | [0016] Preferably, the sludge guide plate includes a screen cloth plate with sieve meshes and a filter cloth fixedly laid on the screen cloth plate, and a water storage chamber is formed between the sludge guide plate and a lower bottom surface of the sedimentation tank. The sludge-water mixture is first subjected to preliminary sludge and water separation through the sludge guide plate, so that sludge on the upper portion of the sludge guide plate is more quickly precipitated into the sludge storage pipe, accelerating the sludge sedimentation and improving the treatment efficiency of the sedimentation tank.

[0017] The present invention has the remarkable technical effects by adopting the above technical solutions:

[0018] According to the present invention, by designing a lower portion of the sedimentation tank into a special sludge sedimentation and sludge discharge structure, the sludge at the lower portion of the sedimentation tank can be discharged more comprehensively, and an ideal sludge discharge effect is achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a schematic structural view of Embodiment 1 of the present invention;

[0020] FIG. 2 is a cross-sectional view of FIG. 1;

[0021] FIG. 3 is a schematic structural view of a sludge storage pipe in FIG. 2;

[0022] FIG. 4 is a schematic structural view of a sludge blocking pipe in FIG. 2;

[0023] FIG. 5 is a schematic structural view of a sludge scraping plate in FIG. 2;

[0024] FIG. 6 is a cross-sectional view of a rotating plate in FIG. 5; 4

[0025] FIG. 7 is a schematic structural view of an oil discharge mechanism in FIG. 2; and

[0026] FIG. 8 is a schematic structural view of an oil scraping plate in FIG. 2. CE

[0027] Names of parts indicated by numerical symbols in the accompanying drawings are as follows: 1. sedimentation tank, 2. oil discharge mechanism, 3. sludge discharge mechanism, 4. sludge blocking cover, 5. handle, 6. drain pipe, 101. sludge discharge pipe, 102. water inlet pipe,

201. oil scraping plate, 202. oil receiving box, 203. conveying belt, 204. oil drain pipe, 205. through groove, 301. sludge storage pipe, 302. sludge guide plate, 303. sludge inlet, 304. sludge blocking pipe, 305. sludge port, 306. sludge scraping plate, 307. pull rod, 308. sliding plate, 309. rotating plate, 310. limiting chute, 311. limiting bump, 312. clamping pin, 313. clamping groove,

314. accommodating groove, 315. first inclined guide surface, 316. second inclined guide surface, 317. connecting rod, 318. arc-shaped chute, 319. screen cloth plate, 320. filter cloth,

321. water storage chamber, 401. insertion groove, 601. drain hole, 602. main water pipe, 603. water outlet pipe, 604. backwashing water pump.

DESCRIPTION OF THE EMBODIMENTS

[0028] The present invention will be further described below in detail with reference to the accompanying drawings and embodiments.

[0029] Embodiment 1

[0030] A sewage treatment device for urban rivers, as shown in FIGs. 1 to 8, includes a sedimentation tank 1 provided with a sludge discharge pipe 101, where an upper portion of the sedimentation tank 1 is provided with a water inlet pipe 102, a sludge discharge mechanism 3 connected to the sludge discharge pipe 101 is disposed in the sedimentation tank 1, the sludge discharge mechanism 3 includes a transversely arranged sludge storage pipe 301 and two sludge guide plates 302 inclined downwards, the two sludge guide plates 302 are symmetrically arranged, and construct a conical sludge storage chamber together with front and rear side walls of the sedimentation tank 1, one end of the sludge storage pipe 301 is fixed to an inner side wall of the sedimentation tank 1, the other end is connected to the sludge discharge pipe 101, an upper side wall of the sludge storage pipe 301 is provided with a sludge inlet 303 that extends in the length direction of the sludge storage pipe 301 and has an upward opening, lower ends of the two sludge guide plates 302 are fixed on both sides of the sludge inlet 303 respectively, a sludge blocking pipe 304 which is coaxial with the sludge storage pipe 301 and can rotate is inserted in a side wall of the sludge storage pipe 301, and a side wall of the sludge blocking pipe 304 is provided with a sludge port 305 capable of matching the sludge inlet 303; when the sludge blocking pipe 304 rotates to the sludge port 305 to correspond to the sludge inlet 303, the ; 5 sludge inlet 303 is in an opened state; and after the sludge-water mixture is slowly precipitated, the sludge sinks and enters into the sludge storage pipe 301 through the sludge guide plate 302-V101486 for precipitation.

[0031] The sludge discharge mechanism 3 also includes a sludge scraping plate 306 which is disposed in the sludge storage pipe 301 and can move in the length direction of the sludge storage pipe 301, and the sludge scraping plate 306 is provided with a pull rod 307 capable of extending out of the sludge discharge pipe 101. The sludge scraping plate 306 includes a sliding plate 308 and a rotating plate 309 each composed of two sector plates, the sliding plate 308 and the rotating plate 309 can be constructed together into a circular plate with an outer side wall in clearance fit with the an inner wall of the sludge storage pipe 301, the rotating plate 309 is fixed to an end of the pull rod 307, the sliding plate 308 sleeves the pull rod 307 and is located between the rotating plate 309 and an end of the pull rod 307 extending out of the sludge discharge pipe 101, an inner wall of the sludge storage pipe 301 is provided with a limiting chute 310 disposed in the length direction of the sludge storage pipe 301, two arc-shaped surfaces of the sliding plate 308 are each provided with a limiting bump 311 capable of sliding in the limiting chute 310, an arc-shaped surface of the rotating plate 309 is provided with a clamping pin 312 capable of completely retracting into the rotating plate 309, and an inner wall of the sludge storage pipe 301 is provided with two clamping grooves 313 matching the clamping pin 312.

[0032] During the precipitation process, the rotating plate 309 and the sliding plate 308 are in a parallel state. At this time, arc-shaped surfaces of the two plates are arranged in the left-right direction, open sides of the two plates are upward or downward. This state facilitates sludge entry into the sludge storage pipe 301, and under this state, the sludge scraping plate 306 can be pushed to the innermost side of the sludge storage pipe 301 to avoid pushing the sludge back to the sludge storage pipe 301 in the push process, improving final sludge discharge efficiency.

| [0033] After the sludge water in the sedimentation tank 1 is precipitated for a period of time, sludge is deposited in the sludge storage pipe 301. At this time, the sludge can be discharged through the sludge scraping plate 306. The rotating plate first rotates to a position perpendicular to the sliding plate 308, so that the rotating plate 309 and the sliding plate 308 together form a circular plate that fits the inner wall of the sludge storage pipe 301. At this time, the clamping pin 312 is clamped into the clamping groove 313 located at a lower vertex of the sludge storage pipe 301, the rotating plate 309 is limited, and then the pull rod 307 is pulled, so that the circular plate pulls the sludge in the sludge storage pipe 301 to the outside of the sludge discharge pipe 101 for discharge.

6

[0034] In addition, a sludge discharge plate is designed into a structure having two plates arranged in a front-rear mode, the rotating plate 309 is fixed to the pull rod 307, and the sliding 0101486 plate 308 is movably connected to the pull rod 307, so that in the process of pulling out the sludge, the sliding plate 308 has a tendency to move backwards under the reaction force of the sludge, so that the sliding plate 308 and the rotating plate 309 can closely fit, sludge flowing out through gaps between the sliding plate 308 and the rotating plate 309 is reduced, the sludge is pulled out to a large extent, and the sludge discharge efficiency is improved. In the process of pushing the sludge scraping plate 306 to the inner side of the sludge storage pipe 301, the sliding plate 308 has a tendency to move forward under the action of the sludge-water mixture.

The pull rod 307 is provided with a limiting block for axially limiting the sliding plate 308, which avoids excessive movement of the sliding plate 308 on the pull rod 307. After the sliding plate 308 moves, there are gaps between the sliding plate 308 and the rotating plate 309. In the process of pushing the sludge scraping plate 306, the sludge-water mixture moves forwards, so that on the one hand, the sludge-water mixture can move forwards from notches on the sliding plate 308 and the rotating plate 309; on the other hand, the sludge-water mixture can flow from the gaps between the sliding plate 308 and the rotating plate 309 to the front of the sludge scraping plate 306 to prepare for the next pull-out of the sludge, and to discharge the sludge more efficiently.

[0035] The arc-shaped surface of the rotating plate 309 is provided with an accommodating groove 314 completely accommodating the clamping pin 312, the clamping pin 312 is disposed in the accommodating groove 314 and connected to a bottom surface of the accommodating groove 314 through a spring, the clamping pin 312 can extend out of the accommodating groove 314 under the action of the spring, an outer side wall of the extending end of the clamping pin 312 is provided with a first inclined guide surface 315, and a side wall at an opening of the clamping groove 313 is provided with a second inclined guide surface 316 which matches the first inclined guide surface 315 to allow the clamping pin 312 to be clamped into or released from the clamping groove 313. The cooperation of the first inclined guide surface 315 and the second inclined guide surface 316 enables the clamping pin 312 to be conveniently clamped into and released from the clamping groove 313, which provides a premise and guarantee for the rotation and limitation of the rotating plate 309. During the limiting process, the rotating plate 309 rotates to the position of the clamping groove 313, the second inclined guide surface 316 on the clamping groove 313 acts on the first inclined guide surface 315 on the clamping pin 312, so that when the clamping pin 312 is retracted into the accommodating groove 314 against elasticity of the spring and reaches the position of the clamping groove 313, the clamping pin 7

312 is clamped into the clamping groove 313 under the elastic action of the spring to achieve the limitation on the rotating plate 309; when the rotating plate 309 needs to be rotated, thd-U101486 second inclined guide surface 316 on the clamping groove 313 also acts on the first inclined guide surface 315 on the clamping pin 312, so that the clamping pin 312 is retracted into the accommodating groove 314 against the elasticity of the spring, and at the same time the clamping pin 312 is deviated from the position of the clamping groove 313. At this time, the limitation on the rotating plate 309 is released.

[0036] The pull rod 307 is further provided with a connecting rod 317 connected to the sludge blocking pipe 304, an inner side wall of the sludge storage pipe 301 is provided with an arc-shaped chute 318 for the connecting rod 317 to slide, one end of the connecting rod 317 is fixed to an outer side wall of the pull rod 307, and the other end passes through the arc-shaped chute 318 and is fixed on an outer side wall of the sludge blocking pipe 304. The two clamping grooves 313 are disposed at a lower vertex and a left vertex of the sludge storage pipe 301 respectively; when the clamping pin 312 is clamped into the clamping groove 313 at the lower vertex of the sludge storage pipe 301, the rotating plate 309 is perpendicular to the length direction of the sliding plate 308 to construct together a circular plate, and the sludge inlet 303 is in a state of being closed by the sludge blocking pipe 304; when the clamping pin 312 is clamped into the clamping groove 313 at the left vertex of the sludge storage pipe 301, the rotating plate 309 is parallel to the length direction of the sliding plate 308, and the sludge inlet 303 and the sludge port 305 are relatively in an open state.

[0037] The sludge blocking pipe 304 and the sludge scraping plate 306 are controlled simultaneously through the rotation of the pull rod 307 such that the sludge storage pipe 301 is in a closed state in the sludge discharge process, and the sludge storage pipe 301 is in an open state in the sludge storage process. The final sludge discharge efficiency is effectively improved, | 25 simultaneous control is performed through the pull rod 307, which is simple and convenient.

[0038] In this embodiment, the number of the limiting chutes 310 and the clamping grooves 313 is three in total. The limiting chutes 310 and the clamping grooves 313 are disposed at a left vertex, a right vertex and a lower vertex of the sludge storage pipe 301 respectively, where the limiting chute 310 at the left vertex is the clamping groove 313 at the same time, on the one hand, is for the limiting bump 311 on the sliding plate 308 to slide, and on the other hand is used as a clamping groove 313 for limiting the clamping pin 312.

[0039] An end face of the sludge discharge pipe 101 is provided with a sludge blocking cover 4, the end of the pull rod 307 extending out of the sludge discharge pipe 101 passes through the sludge blocking cover 4, and a handle 5 is fixed at the end; the handle 5 is provided with a 8 rotation indicating arrow, and the sludge blocking cover 4 is provided with an opening indicating arrow and a closing indicating arrow which match the indicating arrow on the handl& 101486 and are used to indicate an opening and closing state of the sludge port 305.

[0040] In addition, in this embodiment, an end face of the sludge discharge pipe 101 is 5 provided with an insertion groove 401, the sludge blocking cover 4 is provided with an insertion column capable of being inserted in the insertion groove 401, and the sludge blocking cover 4 is connected to the sludge discharge pipe 101 by inserting the insertion column into the insertion groove 401. The sludge blocking cover 4, on the one hand, can play a blocking role in the sludge storage process, and on the other hand, can play a role of blocking sludge in the sludge discharging process, and the sludge splashing to the handle 5 is reduced during sludge discharge. A mode of connection between the sludge blocking cover 4 and the sludge discharge pipe 101 can achieve the quick closing and opening of the sludge blocking cover 4 on the one hand, can avoid rotation of the sludge blocking cover 4, so that the indicating arrow thereon plays an explicit indicating role, and an operator can fully understand whether the sludge storage pipe 301 is in an opened or closed state according to the indicating arrow.

[0041] In this embodiment, a plurality of drain pipes 6 arranged horizontally and arranged parallel to each other in the same horizontal plane are disposed in the sedimentation tank 1, the drain pipes 6 are disposed on upper portions of the sludge guide plates 302, a plurality of drain holes 601 are evenly disposed at pipe walls of the drain pipes 6, one end of each of the drain pipes 6 is fixed to an inner side wall of the sedimentation tank 1, the other end extends out of a side wall of the sedimentation tank 1 and the extending ends are connected by a main water pipe 602, and the main water pipe 602 is connected to a water outlet pipe 603. An end of the water outlet pipe 603 provided with a water outlet valve and away from the main water pipe 602 is connected to a backwashing water pump 604.

[0042] In addition, the sludge guide plate 302 includes a screen cloth plate 319 with sieve meshes and a filter cloth 320 fixedly laid on the screen cloth plate 319, and a water storage chamber 321 is formed between the sludge guide plate 302 and a lower bottom surface of the sedimentation tank 1.

[0043] After precipitation in the sedimentation tank 1 for a period of time, the sludge sinks, and the water in the upper portion of the sludge storage chamber can be discharged through the drain pipe 6. The water discharge process is to reversely introduce water in the sedimentation tank 1 into the drain pipe 6 through the drain hole 601. This water discharge mode is slow and gentle, and does not cause the sludge in the sedimentation tank 1 to be agitated, ensuring the degree of sludge and water separation of the discharged water. The sludge guide plate 302 is 9 designed into a screen cloth plate 319 with a filter cloth 320, so that the sludge-water mixture entering the sedimentation tank 1 in the sedimentation process is first subjected to preliminarÿ "101486 sludge-water separation through the sludge guide plate 302, and sludge on the upper portion of the sludge guide plate 302 is precipitated into the sludge storage pipe 301 more quickly to accelerate the sludge sedimentation. After precipitation for a period of time, the water in the water storage chamber 321 slowly rises, the sludge has basically precipitated during the rising process and then sludge and water are not mixed again, and then the sludge is discharged slowly through the drain pipe 6.

[0044] The water outlet pipe 603 is provided with a water outlet valve which is in a switched-off state in the sedimentation process, and the water outlet valve is in a switched-on state in the water discharge process. When the sedimentation tank 1 needs to be internally cleaned after sludge discharge, water can enter the drain pipe 6 through a backwashing water pump 604 to flush the drain pipe 6, the sludge guide plate 302 and the sludge storage pipe 301, and finally sewage after the flushing is discharged through the sludge discharge pipe 101, to achieve the backflush inside the sedimentation tank 1.

[0045] In this embodiment, an oil discharge mechanism 2 is disposed in the sedimentation tank 1 and located above the water inlet pipe 102. The oil discharge mechanism 2 includes an oil scraping plate 201, an oil receiving box 202 and a horizontally arranged conveying belt 203. Both sides of the conveying belt 203 in the width direction are in clearance fit with front and rear side walls of the sedimentation tank 1, the side wall of the sedimentation tank 1 is provided with an oil drain pipe 204, and the oil receiving box 202 is disposed below one end of the conveying belt 203 and communicated with the oil drain pipe 204; the oil scraping plate 201 is disposed above the oil receiving box 202, one end of the oil scraping plate 201 is fixed to the inner wall of the sedimentation tank 1, and the other end fits the end of the conveying belt 203.

[0046] The oil receiving box 202 is a rectangular shell including a base plate, a rear side plate and left and right side plates. The rear side plate is provided with a groove with an upper end provided with an opening for the conveying belt 203 to be clamped in, an end of the conveying belt 203 passes through the groove and extends into the oil receiving box 202, the side wall of the groove fits the side wall of the conveying pipe 203, and the movement of the conveying belt 203 is not affected while oil can be scraped; and an end of the oil receiving box 202 opposite to the rear side plate is fixed to the side wall of the sedimentation tank 1. The thickness of the middle portion of the oil scraping plate 201 to the end of the oil scraping plate 201 fitting the conveying belt 203 is gradually reduced, and the end of the oil scraping plate 201 fitting the conveying belt 203 is provided with a plurality of through grooves 205 which are evenly 10 disposed in the width direction of the oil scraping plate 201 and are for oil to pass through.

[0047] After sedimentation in the sedimentation tank 1 for a period of time, sludge therein 0 sinks and an oil-water mixture rises. Since oil and water have different densities, the oil floats on the water surface. At this time, the oil can be discharged first and then water is drained. In the oil discharging process, a motor drives the conveying belt 203 to rotate, and the conveying belt 203 is made of a material that can attach oil to the surface and does not absorb oil in. In the rotating process of the conveying belt 203, floating oil is attached to the surface of the conveying belt 203 until the oil is conveyed to the oil scraping plate 201; under the action of the oil scraping plate 201, oil on the surface of the conveying belt 203 is scraped off, part of the oil scraped off falls into the oil receiving box 202 through the through groove 205 on the oil scraping plate 201, another part is pushed to both sides of the conveying belt 203 and then falls into the oil receiving box 202 along the side of the conveying belt 203, and the oil is collected in the oil receiving box 202 and finally discharged through the oil drain pipe 204 to achieve the goal of removing oil in sewage.

[0048] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the patent scope of the present invention should fall within the patent coverage of the present invention.

11

Claims

Claims WHAT IS CLAIMED IS: LU107486

1. A sewage treatment device for urban rivers, comprising a sedimentation tank (1) provided with a sludge discharge pipe (101), wherein an upper portion of the sedimentation tank (1) is provided with a water inlet pipe (102), a sludge discharge mechanism (3) connected to the sludge discharge pipe (101) is disposed in the sedimentation tank (1), the sludge discharge mechanism (3) comprises a transversely arranged sludge storage pipe (301) and two sludge guide plates (302) inclined downwards, one end of the sludge storage pipe (301) is fixed to an inner side wall of the sedimentation tank (1), the other end is connected to the sludge discharge pipe (101), an upper side wall of the sludge storage pipe (301) is provided with a sludge inlet (303) that extends in the length direction of the sludge storage pipe (301) and has an upward opening, lower ends of the two sludge guide plates (302) are fixed on both sides of the sludge inlet (303) respectively, a sludge blocking pipe (304) which is coaxial with the sludge storage pipe (301) and can rotate is inserted in a side wall of the sludge storage pipe (301), and a side wall of the sludge blocking pipe (304) is provided with a sludge port (305) capable of matching the sludge inlet (303); the sludge discharge mechanism (3) also comprises a sludge scraping plate (306) which is disposed in the sludge storage pipe (301) and can move in the length direction of the sludge storage pipe (301), and the sludge scraping plate (306) is provided with a pull rod (307) capable of extending out of the sludge discharge pipe (101).

2. The sewage treatment device for urban rivers according to claim 1, wherein the sludge scraping plate (306) comprises a sliding plate (308) and a rotating plate (309) each composed of two sector plates, the sliding plate (308) and the rotating plate (309) can be constructed together into a circular plate with an outer side wall in clearance fit with the an inner wall of the sludge storage pipe (301), the rotating plate (309) is fixed to an end of the pull rod (307), the sliding plate (308) sleeves the pull rod (307) and is located between the rotating plate (309) and an end of the pull rod (307) extending out of the sludge discharge pipe (101), an inner wall of the sludge storage pipe (301) is provided with a limiting chute (310) disposed in the length direction of the sludge storage pipe (301), two arc-shaped surfaces of the sliding plate (308) are each provided with a limiting bump (311) capable of sliding in the limiting chute (310), an arc-shaped surface of the rotating plate (309) is provided with a clamping pin (312) capable of completely retracting into the rotating plate (309), and an inner wall of the sludge storage pipe (301) is provided with two clamping grooves (313) matching the clamping pin (312).

3. The sewage treatment device for urban rivers according to claim 2, wherein the arc-shaped surface of the rotating plate (309) is provided with an accommodating groove (314) completely 12 accommodating the clamping pin (312), the clamping pin (312) is disposed in the accommodating groove (314) and connected to a bottom surface of the accommodating groove 101486 (314) through a spring, the clamping pin (312) can extend out of the accommodating groove (314) under the action of the spring, an outer side wall of the extending end of the clamping pin (312) is provided with a first inclined guide surface (315), and a side wall at an opening of the clamping groove (313) is provided with a second inclined guide surface (316) which matches the first inclined guide surface (315) to allow the clamping pin (312) to be clamped into or released from the clamping groove (313).

4. The sewage treatment device for urban rivers according to claim 2, wherein the pull rod (3 07) is further provided with a connecting rod (317) connected to the sludge blocking pipe (304), an inner side wall of the sludge storage pipe (301) is provided with an arc-shaped chute (318) for the connecting rod (317) to slide, one end of the connecting rod (317) is fixed to an outer side wall of the pull rod (307), and the other end passes through the arc-shaped chute (318) and is fixed on an outer side wall of the sludge blocking pipe (304).

5. The sewage treatment device for urban rivers according to claim 4, wherein the two clamping grooves (313) are disposed at a lower vertex and a left vertex of the sludge storage pipe (301) respectively; when the clamping pin (312) is clamped into the clamping groove (313) at the lower vertex of the sludge storage pipe (301), the rotating plate (309) is perpendicular to the length direction of the sliding plate (308) to construct together a circular plate, and the sludge inlet (303) is in a state of being closed by the sludge blocking pipe (304); when the clamping pin (312) is clamped into the clamping groove (313) at the left vertex of the sludge storage pipe (301), the rotating plate (309) is parallel to the length direction of the sliding plate (308), and the sludge inlet (303) and the sludge port (305) are relatively in an open state.

6. The sewage treatment device for urban rivers according to claim 1, wherein an end face of the sludge discharge pipe (101) is provided with a sludge blocking cover (4), the end of the pull rod (307) extending out of the sludge discharge pipe (101) passes through the sludge blocking cover (4), and a handle (5) is fixed at the end; the handle (5) is provided with a rotation indicating arrow, and the sludge blocking cover (4) is provided with an opening indicating arrow and a closing indicating arrow which match the indicating arrow on the handle (5) and are used to indicate an opening and closing state of the sludge port (305).

7. The sewage treatment device for urban rivers according to claim 6, wherein an end face of the sludge discharge pipe (101) is provided with an insertion groove (401), the sludge blocking cover (4) is provided with an insertion column capable of being inserted in the insertion groove (401), and the sludge blocking cover (4) is connected to the sludge discharge pipe (101) by 13 inserting the insertion column into the insertion groove (401). LU101486

8. The sewage treatment device for urban rivers according to claim 1, wherein a plurality of drain pipes (6) arranged horizontally and arranged parallel to each other in the same horizontal | plane are disposed in the sedimentation tank (1), the drain pipes (6) are disposed on upper portions of the sludge guide plates (302), a plurality of drain holes (601) are evenly disposed at pipe walls of the drain pipes (6), one end of each of the drain pipes (6) is fixed to an inner side wall of the sedimentation tank (1), the other end extends out of a side wall of the sedimentation tank (1) and the extending ends are connected by a main water pipe (602), and the main water pipe (602) is connected to a water outlet pipe (603).

9. The sewage treatment device for urban rivers according to claim 2, wherein an end of the water outlet pipe (603) provided with a water outlet valve and away from the main water pipe (602) is connected to a backwashing water pump (604).

10. The sewage treatment device for urban rivers according to claim 1, wherein the sludge guide plate (302) comprises a screen cloth plate (319) with sieve meshes and a filter cloth (320) fixedly laid on the screen cloth plate (319), and a water storage chamber (321) is formed between the sludge guide plate (302) and a lower bottom surface of the sedimentation tank (1). 14