KR20090033993A - System for disposing of sediment - Google Patents

Abstract

A general system for treating dredged sediments is provided to decrease a dredged sediment-treating process, prevent environmental contamination and to recycle sand separated from the dredged sediments. A general system for treating dredged sediments includes a latticed screen with coarse openings(10), an inflow tank(20), a spindle-less screw conveyor(30), a drum screen for cleaning and separation(40), and a grit washing unit(70). The latticed screen with coarse openings screens the dredged sediment. The inflow tank is installed at a lower part of the screen. The grit washing unit includes an inflow part(72), a washing tank(74), a vent(73), and a sand transfer unit(79). The dredged sediments treating system includes an adulteration carrying-out conveyor(50), a grit pit(60), a level sensor(62) for the grit pit, a grit transfer pump(64), a treated water pit(80), a level sensor(82) for processing water pit, and a processing water feed pump(84).

Description

System for disposing of sediment

The present invention relates to a dredged water treatment system, and more particularly, by treating the dredged water deposited on the bottom of a river or sewer in a series of processes through a continuous treatment system, thereby greatly increasing the dredged water treatment process. The present invention relates to a dredged overall treatment system that can shorten and maximize time and economic benefits, prevent environmental pollution by dredged water, and recycle sand, etc. separated from dredged water.

In general, dredging refers to a process of deepening the bottom of a river or sewer by removing soil or rocks stacked on the bottom of a river, a coast, or a sewer. It is called dredging. When soil or sediment accumulates in a river or sewer for a certain period of time, the depth of the river or sewage becomes shallow and causes environmental pollution. To solve these problems, dredged water that is stacked on the bottom of the river or sewer periodically is removed. Dredging will be performed.

At the bottom of the coast and water supply and sewage, pollutants have already been contaminated by contaminants accumulated in the past, pollutants from natural ecosystems, and pollutants coming from tributaries and streams. Soils and contaminated sediments can be a fundamental cause of water pollution. Especially, contaminated sediments located at the bottom of rivers or lakes, which are the source of water for most people, are likely to have serious adverse effects on the human body. Therefore, developed countries have already dredged contaminated soil in rivers for a long time, and in Korea, the recent development of new technology for the purification of dredged contaminated soil and contaminated sediments is required.

On the other hand, in Korea, there are few special treatment methods developed for the treatment of contaminated dredged water. In most cases, dredged water has been dumped at sea, but recently, sewage dredged water is classified as industrial dumping prohibited industrial waste. It was prohibited by law. However, it is very urgent to develop the treatment measures for dredging, since the proper treatment measures for dredging have not yet been developed.

In addition, if the contaminants in the dredged are removed efficiently, the treated dredged can be recycled as construction materials and cover, and the transportation cost to the landfill can be saved and landfill space can be saved due to the reduction of landfill volume. It may also have an additional environmental improvement effect.

However, if you look at the prior art related to dredging treatment, most of the dredged water is composed of simply separated and discharged according to the size, and dredging can be cleaned and disposed of in accordance with the dumping standards or recycled as construction materials and cover. It is comprised without.

The present invention has been made to solve the conventional problems as described above, by separating and cleaning the dredged within the treatment standard through a series of continuous processes, so that the treated dredged can be recycled to construction materials and cover, etc. In addition, it is an object of the present invention to provide a dredged water treatment system that can prevent the environmental pollution due to simple dumping to provide an alternative to the prohibition of ocean dumping of sewage dredging.

Dredged water treatment system according to the present invention for solving the above object, the grid screen structure for screening the coarse contaminants in dredging; An inlet tank installed at a lower portion of the trough screen and storing dredged water passing through the trough screen; Shaftless screw conveyor is installed on the inner bottom of the inlet tank for transporting dredged water; The drum is rotated and sand and water is screened, the dredged water transported by the spindleless screw conveyor inlet, the washing water nozzle for spraying the washing water for cleaning the dredging in the drum, not screened A cleaning separation drum screen including a discharge port through which the dredged water is discharged to the outside of the drum; An inlet for the inflow of sand and water screened from the cleaning separation drum screen, an air spray nozzle for injecting air and washing water upwards, a washing water spray nozzle, and a stirrer with a plurality of blades rotating around a rotating shaft are formed therein. And a washing tank configured to clean the introduced sand, an outlet for discharging the processed water overflowed in the washing tank to the outside, and a sand conveying unit for discharging the cleaned sand to the outside with a spindle screw conveyor. It features.

In addition, the dredged water treatment system according to the present invention, the transfer disk for transferring the dredged water discharged to the outlet without being screened in the cleaning separation drum screen, the long rod is attached to the vertical transfer plate, the chain on the long rod And a scrapper carrying conveyor configured to include a short rod connected to the transfer rod, a pipeline to which the transfer disc is moved, a link sprocket for moving the transfer disc, and a scraper interlocked with the link sprocket and detaching the impurities attached to the transfer disc. It can be configured to include.

In addition, the dredged water treatment system according to the present invention, the settling pit is stored water and sand screened in the cleaning separation drum screen; A level sensor for detecting the level of sewage flowing into the immersion pit; When the water level of the sewage sensed by the level sensor reaches a set level, it may be configured to further include an acupuncture transfer pump for transferring the water and sand introduced to the acupuncture pit to the acupuncture scrubber.

In addition, the dredged water treatment system according to the present invention includes a treated water pit for storing the processed water overflowed in the immersion scrubber; A level sensor detecting a level of the treated water flowing into the treated water pit; When the water level of the treated water sensed by the level sensor reaches a set level, it may further comprise a treated water transfer pump for transferring the treated water introduced into the treated water pit to the sewage treatment plant.

In addition, in the dredged water treatment system according to the present invention, it is preferable that a plurality of supports for reinforcing the inside of the inflow tank and dispersing dredged water introduced into the inflow tank are fixedly attached to the inner surface of the inflow tank.

In addition, in the dredged water treatment system according to the present invention, the settling scrubber includes: a rotating plate fixedly coupled to a lower end of a rotating shaft for rotating the stirrer, and having a plurality of upper grinding rods protruded downward; It may be configured to further include a fixing plate fixed to the inner bottom of the cleaning tank, the lower grinding rods for grinding the sand while intersecting the upper grinding rods protrude upwards.

According to the dredged water treatment system according to the present invention having the configuration described above, dredged water containing coarse contaminants can be separated and cleaned within a treatment time within a short time through a series of continuous processes, the treated dredged water There is an effect that can be recycled as construction materials and cover.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the dredged water treatment system according to the present invention.

1 is a schematic diagram illustrating a dredged water treatment system according to the present invention, and FIGS. 2 to 10 illustrate configurations of various devices configuring the dredged water treatment system according to the present invention.

Referring to FIG. 1, the dredged water treatment system according to the present invention includes an inflow tank 10 for screening coarse contaminants contained in dredged water and a dredged water that has passed through the wooded screen 10 ( 20), a spindle-free screw conveyor 30 for transporting dredged water flowing into the inflow tank 20, washing separation drum screen 40 for cleaning and separating dredged water flowing through the spindle-free screw conveyor 30, A fines removal conveyor 50 for transferring the fine contaminants screened from the cleaning separation drum screen 40 to the carrying out container 2, and an immersion cleaner 70 for cleaning the sand passing through the cleaning separation drum screen 40. It is configured by.

In addition, the dredged water treatment system according to the present invention, the sedimentation transfer pump 64 for transferring the sand passed through the washing separation drum screen 40 to the sedimentation scrubber 70 and the treated water discharged from the sedimentation scrubber 70 It may be configured to further include a treatment water transfer pump 84 for transferring to the sewage treatment plant.

According to the dredged water treatment system according to the present invention, the dredged water loaded on the transport means such as dredging vehicle (1) and dropped onto the rough wood screen 10, the coarse contaminants are screened while passing through the rough wood screen (10) After that, it is introduced into the inflow tank 20. Here, the rough wood screen 10 is a device for removing coarse contaminants such as wood chips, rocks, bottles, etc. contained in the dredging in advance, is fixed to the upper portion of the inlet tank (20).

Figure 2 shows the structure of such a wooden screen.

Referring to FIG. 2, the rough screen 10 according to the present invention has a grid-like structure, and each grid has a size such that coarse contaminants cannot pass through, for example, the width and length of the grid are 50 mm each. It is desirable to be manufactured. In addition, the rough wood screen 10 is preferably made of a stainless steel sheet having sufficient strength and excellent corrosion resistance even if heavy dredges such as rocks are dropped at a time. In addition, when a large amount of dredging drops in the vehicle at the same time the dredging screen 10, in order to prevent dredging from flying out of the dredging screen 10, the dredging screen except for the side of the dredging screen 10 It is preferable that the three sides are configured such that scattering prevention walls of a predetermined height are provided. Dredge water passing through the rough wood screen 10 is made of fine dredged water having a fine size by removing the coarse contaminants.

Referring to FIG. 1, the fine dredged water from which coarse contaminants have been removed while passing through the jaw screen 10 flows into the inflow tank 20 and is fixed to the inner surface of the inflow tank 20 without a screwless conveyor 30. ) Is transferred to the cleaning separation drum screen 40.

3 to 5 show the front, the flat and the side of the inlet tank, respectively, Figure 6 shows the inlet tank with a wooden screen is installed.

3 to 6, the inflow tank 20 according to the present invention has a rectangular structure so that dredged water from which coarse contaminants are removed while being passed through the rough screen 10 can be stored in a large amount. And the dredged water flowing into the inflow tank 20 is introduced to facilitate the transfer from the inflow tank 20 to the cleaning separation drum screen 40 by the non-screwed screw conveyor 30 installed on the bottom surface of the inflow tank 20, Both sides of the lower side of the tank 20 is made of an inclined structure. In order to support the inflow tank 20 having a lower end inclined structure as described above, a plurality of struts 26 perpendicular to the ground are fixedly attached to the lower portion of the inflow tank 20. And in order to reinforce and support the inside of the inflow tank 20, and at the same time to dredge water flowing into the inflow tank 20 through the rough wood screen 10, a plurality of supports 24 are inlet tank It is preferable to be fixedly attached to the inner side surface of the 20. In addition, the top surface of the inflow tank 20 is formed with a cradle 22 on which the rough screen 10 is seated.

And at the point where the inner bottom surface of the inflow tank 20, ie, the inclined both sides of the inflow tank 20 converge, the no-screw screw conveyor 30 is installed in the horizontal direction over the entire length of the inflow tank 20. . The spindleless screw conveyor 30 is a device for transferring dredged water introduced into the inflow tank 20 to the cleaning separation drum screen 40, and is driven by a reduction motor 34 formed at one end thereof and the opposite end thereof. The cleaning separation drum screen 40 is made of a structure that is connected. At this time, the conveyor pipe 32 extending from the lower end of the inflow tank 20 is connected to the cleaning separation drum screen 40, one end of the shaftless screw conveyor 30 protruding out of the inflow tank 20 is the It is protected from the outside by the conveyor pipe 32.

And the upper one side of the inflow tank 20, the overflow pipe 28 for adjusting the water level of the inflow tank 20 is formed to extend, it is preferably configured to be connected to the cleaning separation drum screen (40).

Referring to FIG. 1, dredged water introduced into the washing separation drum screen 40 by the spindleless screw conveyor 30 is washed by the washing water in the washing separation drum screen 40 and fined, such as gravel. Contaminants are screened.

7 and 8 show the cleaning separation drum screen of the dredged overall processing system according to the present invention.

Referring to FIGS. 7 and 8, the cleaning separation drum screen 40 according to the present invention is a drum 44 on which sand and water are screened while being driven to rotate, and dredged water transported by the spindleless screw conveyor 30. The inlet 42 flowing into the drum 44, the washing water nozzle 48 for spraying the washing water for washing the dredged water into the drum 44, and the dredged water not screened are discharged to the outside of the drum 44. It comprises a discharge port 49 is formed, and also the casing 41 surrounding the drum 44, the motor 45 and the chain 46 for rotating the drum 44, the roller supporting the rotation of the drum 44 47, etc., are further included.

The drum 44 is connected to the motor 45 by a chain 46 and a sprocket, and may be driven by being connected to the motor by a reduction gear, although not shown. On the other hand, since the conveyor pipe 32 and the overflow pipe 28 extending from the inflow tank 20 are respectively inserted into the inlet port 42 communicating with the drum 44, the non-screw screw conveyor 30 is conveyed. The dredged water and the water transferred through the overflow pipe 28 are introduced into the drum 44 of the cleaning separation drum screen 40 through the inlet 42.

The dredged water introduced into the drum 44 is separated into a contaminant having a predetermined size or more by water and sand by a plurality of perforations formed through the inner circumferential surface of the drum 44. For example, when the diameter of the perforated hole is 10 mm , And other contaminants such as gravel having a diameter of 10 mm or more do not pass through the perforations, and only sand and water having a diameter of 10 mm or less pass through the perforations and are discharged to the outside of the drum 44. Meanwhile, in the above description, the dredged water is screened by a plurality of perforations formed through the inner circumferential surface of the drum. However, the dredged water is also screened by a plurality of wedges formed on the inner surface of the drum. Can be.

In addition, the cleaning separation drum screen 40 according to the present invention is installed in an inclined structure, for example, an inclined structure of about 10 mm, and dredged water is introduced into the drum 44 by the spindleless conveyor. When introduced into the drum 44, the dredged water which does not pass through the perforations by the screw blades mounted inside the drum 44 is transferred to the outlet 49 of the drum 44.

In addition, the rotating drum 44 is supplied with washing water for cleaning the dredged water from the washing water nozzle 48, and this washing water allows sand to smoothly pass through the perforations as well as the cleaning function of the dredging water.

And, referring to Figure 1, fine dredging, such as gravel discharged to the outlet 49 of the drum 44 without passing through the perforations in the cleaning separation drum screen 40 is carried out by the miscellaneous material carrying conveyor 50 It is transferred to the container 2. It is preferable to use the pipeline-type link conveyor of patent registration No. 489924 as the contaminant carrying conveyor 50 according to the present invention.

Figures 9 and 10 illustrate a contaminant removal conveyor according to this invention.

9 and 10, the miscellaneous material carrying conveyor 50 according to the present invention is a link chain in which a plurality of short rods 53 are connected to a chain 54 by a long rod 52 having a transfer disc 51. The link sprocket 57 and the link sprocket 57 driven by the pipeline 56 and the drive motor 59 through which the link chain 55 is moved, move the link chain 55. It is configured to include a scraper (58) for interlocking with and attached to the transfer disk 51, the contaminants attached.

Here, the end rod 53 is divided into a first rotating rod 53a and a second rotating rod 53b, and the first rotating rod 53a and the second rotating rod 53b are rotatable to each other. An end portion of the first rotating rod 53a is inserted into and coupled to the second rotating rod 53b. As a result, the link chain 55 is freely rotated in the circumferential direction, so that twisting and twisting are appropriately prevented when the link chain 55 moves in an endless track through the pipeline 56.

Accordingly, according to the contaminant removal conveyor 50 according to the present invention, dredged water separated and discharged from the cleaning separation drum screen 40 is introduced into the pipeline 56 of the contaminant discharge conveyor 50, and the pipeline ( 56 dredged water introduced into the pipeline 56 is transported along the pipeline 56 by the transfer disk 51 of the link chain 55 which rotates in an endless track in the pipeline 56, It is discharged to the export container 2 located at the bottom. At this time, the contaminants adhered to the transfer disc 51 is detached by the scraper 58 provided in conjunction with the lower portion of the link sprocket 57 and discharged to the carrying-out container 2.

On the other hand, in the above, but described as a contaminant carrying conveyor according to the present invention is composed of the technology posted on the pipeline type link conveyor of Patent Registration No. 489924, the contaminant carrying conveyor according to the present invention is not limited to this, a general belt conveyor or screw It may be comprised of various conveyors, such as a conveyor.

Referring to FIG. 1, the water and sand screened and discharged from the cleaning separation drum screen 40 are transferred to the sedimentation pit 60, and then, the sedimentation scrubber 70 cleans the sand by the sedimentation transfer pump 64. Is transferred to).

In the immersion pit 60 according to the present invention, a level sensor 62 for detecting the level of water flowing from the cleaning separation drum screen 40 is installed. A needle feed pump 64 for transferring to 70 is installed. Therefore, the water and sand discharged through the perforations from the cleaning separation drum screen 40 flows into the immersion pit 60, and the level sensor 62 detects the water and sand levels flowing into the immersion pit 60. When the level of the water and sand detected by the level sensor 62 reaches the set level, the sedimentation transfer pump 64 is operated to transfer the water and sand introduced into the immersion pit 60 to the immersion scrubber 70. Will be transferred.

The sedimentation transfer pump 64 pumps the sewage flowing into the sedimentation pit 60, and is made of a rigid structure that can withstand continuous and intermittent operation in water, and also operates smoothly with less vibration and noise. It is preferable to use dry submerged electric motors.

1, the sewage transferred by the sedimentation transfer pump 64 is separated into sand and organic matter in the sedimentation scrubber 70, and the separated sand is washed and carried out to the outside.

As described above, the sedimentation scrubber 70 is a device for separating sand and organic matter and washing the separated sand. The sedimentation scrubber 70 is connected to the sedimentation pump 64 and is introduced through the inlet 72 and the inlet 72 for transporting sewage. It comprises a washing tank 74 for cleaning and separating sewage, and a sand conveying portion 78 for cleaning and separating the sand to be carried out.

In Fig. 11, the immersion scrubber according to the present invention is shown.

Referring to FIG. 11, the inlet 72 is connected to the pipe of the sedimentation transfer pump 64 to introduce sewage into the washing tank 74, and the sewage flowing into the washing tank 74 forms a swirl flow. It is preferable that the sand be formed in a fallopian tube shape so that the sand can be detached. In addition, the cleaning tank 74 is a device for separating sand and organic matter from the sewage flowing through the inlet portion 72 and washing the sand, and is sufficient to allow the sand precipitated by gravity to settle smoothly in the lower portion. It must be configured to have a capacity. In addition, an air injection nozzle 75a for injecting air upward and a washing water injection nozzle 75b for injecting washing water upward are formed at the lower end of the cleaning tank 74, and at the lower end of the center of the cleaning tank 74. An agitator 76 is formed in which a plurality of wings rotate about the rotation shaft 76a. Therefore, in the cleaning tank 74, uniform upflow flow is generated by the air and washing water sprayed from the air spray nozzle 75a and the washing water spray nozzle 75b, and the stirrer 76 rotating at a low speed. The sand flowing into the washing tank 74 flows in the washing tank 74 along the upward flow, and the organic matter is detached by the stirrer 76 and washed by the washing water.

On the other hand, the rotary plate 77 is a plurality of upper grinding rods (77a) protruding downward fixedly coupled to the lower end of the rotating shaft (76a) for rotating the stirrer 76, and the upper grinding rods (77a) A fixing plate 78 is formed on the inner bottom surface of the cleaning tank 74 by a connecting table 78b, in which a lower grinding rod 78a for grinding sand intersects and protrudes upward. Therefore, the sand which is first detached by the stirrer 76 is sedimented to the bottom and is secondly detached while being ground by the grinding bars 77a and 78a.

In addition, the sand separated and washed in the cleaning tank 74 and precipitated at the bottom of the cleaning tank 74 is carried out to the outside through the sand transfer unit 79 connected to the bottom of the cleaning tank 74. The sand transfer unit 79 is composed of a spindle screw conveyor for transporting sand and a conveyor pipe surrounding the spindle screw conveyor.

And, referring to Figure 1, the treated water overflowed in the immersion scrubber 70, 70 is discharged through the discharge port 73 of the immersion scrubber 70 to move to the treated water pit 80, and then transfer the treated water It is sent to the sewage treatment plant by the pump 84. At this time, the treated water overflowed in the immersion scrubber 70, the washing water injection nozzle for washing the sewage introduced into the rinsing tank 74 by the immersion transfer pump 64 and the sand in the rinsing tank 74 ( Washing water sprayed by 75b).

The treated water pit 80 according to the present invention is provided with a level sensor 82 that detects the level of the treated water flowing from the sedimentation scrubber 70, and further provides the treated water introduced into the treated water pit 80 to the sewage treatment plant. A treatment water transfer pump 84 for transferring the water is installed. Therefore, the treated water overflowed from the immersion cleaner 70 is discharged into the treated water pit 80, and the level sensor 82 detects the level of the treated water flowing into the treated water pit 80. When the water level of the treated water detected by the level sensor 82 reaches the set level, the treated water transfer pump 84 is operated to transfer the treated water introduced into the treated water pit 80 to the sewage treatment plant.

While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

1 is a schematic diagram showing a dredged water treatment system according to the present invention.

Figure 2 is a plan view showing a rough screen of dredged water treatment system according to the present invention.

3 to 6 is a block diagram showing an inlet tank of the dredged water treatment system according to the present invention.

7 and 8 is a block diagram showing a washing separation drum screen of the dredged water treatment system according to the present invention.

9 and 10 is a block diagram showing a mess take-out conveyor of the dredged water treatment system according to the present invention.

11 is a block diagram showing a sedimentation scrubber of the dredged water treatment system according to the present invention.

* Description of the symbols for the main parts of the drawings *

One; Dredge vehicle 2; Export container

10; Rough screen 20; Inflow tank

22; Cradle 24; support fixture

26; Landlord 28; Overflow piping

30; Spindleless screw conveyor 32; Conveyor piping

40; Cleaning separation drum screen 41; Casing

42; Inlet 44; drum

48; Washing water nozzle 49; outlet

50; Trash removal conveyor 60; Tread feet

62; Level sensor 64; Sedimentation transfer pump

70; Settling scrubber 72; Inlet

73; Outlet 74; Cleaning tank

80; Treated water feet 82; Level sensor

84; Treated Water Transfer Pump

Claims (6)

A grid screen for screening coarse contaminants in dredged water; An inlet tank installed at a lower portion of the trough screen and storing dredged water passing through the trough screen; Shaftless screw conveyor is installed on the inner bottom of the inlet tank for transporting dredged water; The drum is rotated and sand and water is screened, the dredged water transported by the spindleless screw conveyor inlet, the washing water nozzle for spraying the washing water for cleaning the dredging in the drum, not screened A cleaning separation drum screen including a discharge port through which the dredged water is discharged to the outside of the drum; An inlet for the inflow of sand and water screened from the cleaning separation drum screen, an air spray nozzle for injecting air and washing water upwards, a washing water spray nozzle, and a stirrer with a plurality of blades rotating around a rotating shaft are formed therein. And a cleaning tank configured to clean the introduced sand, a discharge port through which the processed water overflowed in the cleaning tank is discharged to the outside, and a sand conveying unit to discharge the cleaned sand to the outside through a spindle screw conveyor; Dredge comprehensive treatment system comprising a. The method of claim 1, A transfer disc for transferring dredged water not discharged from the cleaning separation drum screen to the discharge port, a long rod attached vertically to the transfer disc, a short rod connected to the long rod by a chain, and the transfer disc being moved A dust removal conveyor including a pipeline, a link sprocket for moving the transfer disc, and a scraper interlocked with the link sprocket and detaching the impurities attached to the transfer disc; Dredged water treatment system further comprises a. The method of claim 1, A settling pit for storing water and sand screened in the cleaning separation drum screen; A level sensor for detecting the level of sewage flowing into the immersion pit; An acupuncture transfer pump for transferring water and sand introduced into the acupuncture pit to an acupuncture scrubber when the water level of the sewage detected by the level sensor reaches a set level; Dredged water treatment system further comprises a. The method of claim 1, A treated water pit for storing the processed water overflowed in the immersion scrubber; A level sensor detecting a level of the treated water flowing into the treated water pit; A treated water transfer pump configured to transfer the treated water introduced into the treated water pit to the sewage treatment plant when the level of the treated water detected by the level sensor reaches a set level; Dredged water treatment system further comprises a. The method according to any one of claims 1 to 4, A reinforcement support system for the inside of the inflow tank, and a plurality of supports for dispersing dredged water flowing into the inlet tank is fixed dredged water treatment system, characterized in that fixedly attached to the inner surface of the inlet tank. The said settling scrubber is in any one of Claims 1-4, A rotating plate fixedly coupled to the lower end of the rotating shaft for rotating the stirrer, the plurality of upper grinding rods protruding downward; A fixing plate fixedly installed on an inner bottom of the cleaning tank and having a lower grinding rod protruding upward while crossing the upper grinding rod and grinding sand; Dredged water treatment system further comprising a.

Images