CN212954827U

CN212954827U - Sediment dewatering device

Info

Publication number: CN212954827U
Application number: CN202021115117.1U
Authority: CN
Inventors: 李川振; 罗涛; 孙超; 李云龙
Original assignee: Stecol Corp
Current assignee: Stecol Corp
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-04-13
Anticipated expiration: 2030-06-16

Abstract

The utility model relates to a technical field of water quality protection, a sediment dewatering device is proposed, including the mud transport pipe way, be connected with the online charge equipment who is used for adding the flocculating agent on the mud transport pipe way, mud transport pipe way and at least one geotechnological tube bag intercommunication, geotechnological tube bag is used for dehydrating mud, a plurality of transport ports that are used for carrying mud to the geotechnological tube bag are seted up to the pipeline mouth of mouth section of mud transport pipe way, transport port accessible valve independent control, still set up the transparent online sampling tube that is used for observing the mud consolidation condition on the mud transport pipe way, transparent online sampling tube passes through switch and mud transport pipe way intercommunication or cuts off. Can reduce mud filling pressure through a plurality of delivery ports, ensure that geotechnological piping bag fills evenly fully, can observe the consolidation condition of mud at any time through transparent online sampling tube, carry out the adaptability adjustment to the addition of flocculating agent according to the consolidation condition of mud to can optimize the mud consolidation effect, improve consolidation efficiency to the at utmost.

Description

Sediment dewatering device

Technical Field

The utility model relates to a technical field of water quality protection, more specifically say, relate to a sediment dewatering device.

Background

In water body environment treatment engineering, endogenous pollution is usually from bottom mud at the bottom of rivers and lakes, the bottom mud is usually formed by depositing on the bottom of a water body through long-time physical, chemical, biological and other actions and water body transmission, pollutants in the bottom mud are continuously released into the rivers and lakes, endogenous pollution of the bottom mud is formed, endogenous pollution needs to be controlled through a dredging process, and water quality is improved. At present, the ideal river and lake dredging treatment mode is to carry out in-situ dehydration on sludge, reduce the volume and the water content of the sludge and then carry out subsequent treatment or resource utilization. For example, underwater dredging can be performed by an environment-friendly cutter suction dredger, underwater bottom mud is ground by the rotation of a special reamer, and is mixed with river water to form a mud-water mixture, and the mud-water mixture is pumped to a nearby bottom mud treatment field through a mud conveying pipeline for treatment. The water content of the sediment after dredging by a dredger is up to more than 90%, the sediment is inconvenient to transport and difficult to process, so that the sediment needs to be pretreated to remove water (namely, dewatering and volume reduction), and the geotechnical pipe bag dehydration method is a commonly used sediment pretreatment dehydration method. In the existing geotechnical pipe bag dehydration method, the addition amount of the flocculating agent is often different aiming at slurry with different water contents or slurry with different sediment particle diameters, the specific addition amount of the flocculating agent is often difficult to control in the actual operation process, and excessive addition or insufficient addition is easy to occur, so that the consolidation effect or the consolidation efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sediment dewatering device aims at solving prior art, thereby the technical problem of the difficult control of flocculating agent addition in the geotechnological tube bag dehydration influences the mud consolidation effect.

In order to solve the technical problem, the utility model provides a bottom mud dewatering device, which comprises a mud conveying pipeline, the slurry transport pipeline is connected with an on-line dosing device which is used for adding a flocculating agent into the slurry, the bottom sediment dewatering device also comprises at least one geotextile tube bag communicated with the slurry conveying pipeline, the geotechnical pipe bag is used for dehydrating the slurry added with the flocculating agent, a plurality of conveying ports used for conveying the slurry to the geotechnical pipe bag are arranged at the pipeline opening section of the slurry conveying pipeline, the plurality of conveying ports respectively control the conveying flow rate of the slurry through a slurry conveying valve, and the slurry conveying pipeline connected with the output end of the on-line dosing equipment is also provided with a transparent on-line sampling tube for observing the slurry consolidation condition, and the transparent on-line sampling tube is communicated or separated with the slurry conveying pipeline through a switch.

Furthermore, the transparent on-line sampling tube comprises an open end and a closed end, the open end is fixedly connected to the slurry conveying pipeline and communicated with or separated from the slurry conveying pipeline through the switch arranged on the slurry conveying pipeline, and the closed end is vertically and upwards arranged relative to the slurry conveying pipeline.

Further, the geotextile tube bag is provided with at least one filling inlet connected with the conveying port, and the filling inlet is used for guiding the slurry into the geotextile tube bag.

Furthermore, drainage ditches are arranged around the geotechnical pipe bags and used for guiding and draining water drained by the geotechnical pipe bags to the residual water treatment area.

Furthermore, a macadam guide and discharge layer, a composite geomembrane layer and a foundation base layer are sequentially laid at the bottom of the geotextile tube bag from top to bottom, and water drained by the geotextile tube bag is discharged into the drainage ditch through the macadam guide and discharge layer.

The utility model provides a sediment dewatering device's beneficial effect lies in: compared with the prior art, the utility model discloses a sediment dewatering device includes mud transport pipe way, be connected with the online charge equipment that is used for adding the flocculating agent in to mud on the mud transport pipe way, sediment dewatering device still includes at least one earth tube bag with mud transport pipe way intercommunication, earth tube bag is used for dehydrating to the mud after adding the flocculating agent, a plurality of delivery ports that are used for carrying mud to earth tube bag are seted up to mud transport pipe way's pipeline mouth section, a plurality of delivery ports are respectively through the transport flow of mud delivery valve control mud, still set up the transparent online sampling tube that is used for observing the mud consolidation condition on the mud transport pipe way of being connected with online charge equipment output, transparent online sampling tube passes through switch and mud transport pipe way intercommunication or cuts off. The consolidation condition of the slurry can be observed at any time through the arranged transparent online sampling tube, and the addition of the flocculating agent is adaptively adjusted according to the consolidation condition of the slurry, so that the consolidation effect is optimized, and the consolidation efficiency is improved to the greatest extent.

Drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the drawings that are needed in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, and in which:

FIG. 1 is a schematic side plan view of a bottom mud dewatering device according to an embodiment of the present invention;

fig. 2 is a top plan schematic view of the embodiment shown in fig. 1.

Description of reference numerals:

1. a slurry transport pipeline; 11. a delivery port; 12. a slurry delivery valve; 13. a transparent on-line sampling tube; 131. an open end; 132. a closed end; 2. a pressurized relay pump; 3. online dosing equipment; 4. a dewatering zone; 41. a soil engineering pipe bag; 42. a drainage ditch; 43. a macadam guide and discharge layer; 44. compounding a geomembrane layer; 45. a field bottom foundation layer; 5. a regulating tank; 6. a mud pit.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The following embodiments with reference to the drawings are illustrative and intended to explain the present invention, and should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning mechanically or electrically connected; the connection may be direct, indirect or internal, or may be a connection between two elements or an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings:

as shown in fig. 1 and fig. 2, in this embodiment, the sediment dewatering device includes a slurry transport pipeline 1, an online chemical adding device 3 is connected to the slurry transport pipeline 1, the on-line dosing equipment 3 is used for adding a flocculating agent into the slurry, the sediment dewatering device further comprises at least one soil engineering pipe bag 41 communicated with the slurry conveying pipeline 1, the soil engineering pipe bag 41 is used for dewatering the slurry added with the flocculating agent, a plurality of conveying ports 11 used for conveying the slurry to the soil engineering pipe bag 41 are formed in the pipeline opening section of the slurry conveying pipeline 1, the conveying flow of the slurry is controlled by the plurality of conveying ports 11 through a slurry conveying valve 12 respectively, and a transparent online sampling tube 13 for observing the consolidation condition of the slurry is also arranged on the slurry conveying pipeline 1 connected with the output end of the online dosing device 3, and the transparent online sampling tube 13 is communicated or separated with the slurry conveying pipeline 1 through a switch.

Specifically, in the above embodiment, the dredging apparatus first mixes the bottom mud in the area to be dredged into slurry with water, and then discharges the slurry to the bottom mud treatment field through the slurry transport pipe 1 for subsequent treatment. The sediment disposal site is provided with a mud pit 6 for storing the conveyed mud to be further dewatered, a main trunk line of the mud conveying pipeline 1 can be erected along the side slope of the mud pit 6, a pipeline curve section is connected by adopting a bent pipe or a hose, the joint connection part needs to be tight and firm, the mud conveying pipeline 1 needs to be ensured to be smooth, and the situation of blockage or mud leakage in the mud conveying process is prevented. In order to ensure sufficient power in the process of conveying the slurry on land, a corresponding pressurizing relay pump 2 can be arranged on the slurry conveying pipeline 1. Before the slurry enters the dehydration zone 4 for dehydration, a flocculating agent needs to be added to flocculate fine sludge particles into clusters, so that the slurry and the water are quickly separated, the dehydration time is shortened, and the effluent quality can be ensured. The flocculating agent is added through the online dosing equipment 3 connected to the slurry transport pipeline 1, and after dosing is completed, the slurry is transported to the soil engineering pipe bag 41 through the plurality of transport ports 11 for dehydration treatment. The slurry delivery valve 12 can control the delivery flow rate of the delivery ports 11, the delivery ports 11 can be adjusted according to the amount of the slurry to be dehydrated and the volume of the geotube bag 41, the delivery ports 11 can be opened simultaneously for slurry delivery, and only a part of the delivery ports 11 or only one delivery port 11 can be opened for slurry delivery. The plurality of conveying ports 11 are arranged at the pipeline opening section of the slurry conveying pipeline 1, the slurry conveying valve 12 is arranged for controlling, the impact force when slurry is filled into the geotechnical pipe bag 41 can be reduced by utilizing split flow, meanwhile, the conveying speed of the slurry can be adjusted according to the filling degree of the geotechnical pipe bag 41, the free control of the slurry filling process is realized, and the slurry in the geotechnical pipe bag 41 is ensured to be filled uniformly and fully.

Preferably, the transparent online sampling pipe 13 arranged on the slurry transport pipeline 1 can be an organic glass pipe, when the transparent online sampling pipe 13 needs to collect a slurry sample for observation, the corresponding switch is turned on, so that the slurry in the slurry transport pipeline 1 can be collected as the sample in real time, and the consolidation condition of the slurry sample is observed, so that whether the dosage of the flocculating agent added into the slurry at the moment is proper or not can be judged, and the addition dosage of the flocculating agent is adjusted, so that the slurry achieves a better consolidation effect, and the slurry is promoted to be consolidated more quickly.

The sediment dewatering device of the embodiment reduces the impact force of the slurry by arranging the plurality of conveying ports 11 at the pipeline opening section of the slurry conveying pipeline 1, reduces the local accumulation of the slurry in the soil engineering pipe bags 41, ensures that the soil engineering pipe bags 41 are filled uniformly and fully, and thus utilizes the filling volume of the soil engineering pipe bags 41 to the maximum extent; the free control of the slurry filling rate is realized by installing the slurry conveying valve 12, the consolidation condition of the slurry can be observed at any time through the transparent online sampling tube 13, and the addition of the flocculating agent is adaptively adjusted according to the consolidation condition of the slurry, so that the aims of optimizing the consolidation effect and improving the consolidation efficiency to the maximum extent are fulfilled.

As shown in fig. 1, in this embodiment, the transparent on-line sampling tube 13 includes an open end 131 and a closed end 132, the open end 131 is fixedly connected to the slurry transport pipe 1 and is connected to or isolated from the slurry transport pipe 1 by a switch disposed on the slurry transport pipe 1, and the closed end 132 is disposed vertically upward relative to the slurry transport pipe 1.

Specifically, in the above embodiment, the transparent online sampling tube 13 is vertically installed on the slurry transporting pipeline 1, and the transparent online sampling tube 13 can be connected and fixed by forking on the slurry transporting pipeline 1 and sealing at the interface. The switch is arranged on the slurry transport pipeline 1, when the switch is turned on, slurry enters the transparent online sampling pipe 13 from the opening end 131, the slurry is stable after reaching a certain liquid level height in the pipe and begins to deposit, and the mud-water separation phenomenon occurs, and when the switch is turned off, the transparent online sampling pipe 13 can be separated from the slurry transport pipeline 1. The transparent online sampling tube 13 can visually observe the consolidation condition of the slurry in the tube through naked eyes, so that the online monitoring of the consolidation condition of the slurry is realized, and the addition of the flocculating agent can be adjusted through an observation result, thereby optimizing the consolidation effect and improving the consolidation efficiency.

Preferably, in an embodiment, the geotube bag 41 is provided with at least one filling inlet connected to the delivery port 11, and the filling inlet is used for guiding slurry into the geotube bag 41. The number of the filling inlets can be adaptively set according to the volume of the geotube bag 41 capable of containing slurry, for example, when the volume of the geotube bag 41 is large, a plurality of filling inlets can be additionally arranged, and the geotube bag 41 can be filled through a plurality of conveying ports 11 at the same time, so that the filling efficiency is improved, and the geotube bag 41 can be filled uniformly and completely; when the volume of the geotextile tube bag 41 is small, the sufficient filling rate and the uniform effect can be ensured by providing one or a small number of filling inlets. Mud enters the geotextile tube bag 41 through the filling inlet, cement separation occurs under the action of the flocculating agent, residual water is filtered out through the grain gap of the geotextile tube bag 41, and silt is trapped in the geotextile tube bag 41. Meanwhile, under the combined action of the self weight of the sand in the soil engineering pipe bag 41 and the filling pressure, the sand in the soil engineering pipe bag 41 bears the extrusion force, the discharge of residual water is further accelerated, the clearance of sand particles is reduced again, and the consolidation of the soil body is accelerated. In the filling process, the mud and sand accumulation condition at the filling inlet is frequently checked, and the opening and closing of the conveying port 11 are adjusted in time, so that the mud and sand in the soil engineering pipe bag 41 are filled uniformly and completely. And after the whole geotextile tube bag 41 is filled to a full stage, the filling can be reduced or stopped, so that bursting is prevented, and the consolidation dehydration time is reserved. After the primary filling does not reach the designed height, the geotechnical pipe bag 41 can be filled for two or more times after being slightly solidified until the filling degree is full, so that the filling volume of the geotechnical pipe bag 41 is utilized to the maximum extent.

As shown in fig. 2, a drainage ditch 42 is arranged around the geotextile tube bag 41, and the drainage ditch 42 is used for guiding and draining water drained by the geotextile tube bag 41 to the residual water treatment area.

Specifically, the drainage ditch 42 can be set according to the stacking condition of the geotextile tube bags 41, for example, the geotextile tube bags 41 can be stacked into 1-2 layers, the average height of each layer of the geotextile tube bags is 1m after dehydration, 4-5 rows of geotextile tube bags 41 are taken as a dehydration unit, the drainage ditch 42 is arranged around each dehydration unit, optionally, the section size of the drainage ditch 42 can be 60cm × 60cm, after the geotextile tube bags 41 drain water, the drainage ditch 42 leads the drainage ditch to a waste water treatment area for treatment, and the waste water treatment area can comprise an adjusting tank 5, a sedimentation tank, a regulation and storage tank and the like. The drainage ditch 42 is arranged on site, and can conveniently guide and drain residual water to the corresponding treatment tank for further treatment.

As shown in fig. 1, in this embodiment, the bottom of the geotextile tube bag 41 is subjected to anti-seepage treatment, a gravel guide layer 43, a composite geomembrane layer 44 and a field bottom foundation layer 45 are sequentially laid from top to bottom, preferably, a pebble layer with a thickness of 30cm is selected as the gravel guide layer 43, and a composite geomembrane layer 44 with a thickness of 600 g/square meter is selected for residual water anti-seepage. The crushed stone guide and discharge layer 43 separates the bottom of the geotextile tube bag 41 from the composite geotextile film layer 44, a layer of interlayer with gaps is formed at the bottom of the geotextile tube bag 41, water drained from the geotextile tube bag 41 can seep into the composite geotextile film layer 44 through the gaps of the crushed stone guide and discharge layer 43, and the composite geotextile film layer 44 has an anti-seepage effect, so that the drained water is further guided and discharged to the surrounding drainage ditches 42 and is guided and discharged to the corresponding treatment tanks by the drainage ditches 42 for the next treatment. Through the consolidation process of the soil engineering pipe bag 41, soil particles can adsorb partial harmful elements, the emission of pollutants in the residual water is reduced, and experiments prove that the indexes of harmful substances in the dehydrated filtrate can be reduced by 60% -96%, however, although the dehydrated filtrate filters more than 60% of pollution indexes, the concentration of the pollutants in the residual water still exceeds the standard, and the pollutant content needs to be further treated to be reduced as far as possible. Therefore, the arrangement of the broken stone guide and discharge layer 43 and the composite geomembrane layer 44 can ensure that the soil layer of the soil engineering pipe bag 41 is drained smoothly on one hand, and on the other hand, the drained residual water cannot directly seep into the bottom of the field foundation layer 45 below the soil engineering pipe bag 41 to cause soil layer pollution, but is drained to the corresponding drainage ditch 42 in an anti-seepage way, and is uniformly conveyed by the drainage ditch 42 to perform next purification treatment.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A bottom sediment dehydration device comprises a slurry transport pipeline and is characterized in that the slurry transport pipeline is connected with an online dosing device, the on-line dosing equipment is used for adding a flocculating agent into the slurry, the sediment dewatering device also comprises at least one geotechnical pipe bag communicated with the slurry conveying pipeline, the geotechnical pipe bag is used for dehydrating the slurry added with the flocculating agent, a plurality of conveying ports used for conveying the slurry to the geotechnical pipe bag are arranged at the pipeline opening section of the slurry conveying pipeline, the plurality of conveying ports respectively control the conveying flow rate of the slurry through a slurry conveying valve, and the slurry conveying pipeline connected with the output end of the on-line dosing equipment is also provided with a transparent on-line sampling tube for observing the slurry consolidation condition, and the transparent on-line sampling tube is communicated or separated with the slurry conveying pipeline through a switch.

2. The sediment dewatering apparatus of claim 1, wherein the transparent in-line sampling tube comprises an open end and a closed end, the open end is fixedly connected to the slurry transport pipe and is communicated with or isolated from the slurry transport pipe by the switch disposed on the slurry transport pipe, and the closed end is disposed vertically upward relative to the slurry transport pipe.

3. The sediment dewatering apparatus of claim 1 wherein the geotextile tube bag defines at least one fill inlet connected to the delivery port, the fill inlet for directing the slurry into the geotextile tube bag.

4. The sediment dewatering apparatus of claim 3, wherein the geotextile tube bag is provided with a drainage ditch around the geotextile tube bag, and the drainage ditch is used for guiding and draining water drained by the geotextile tube bag to the residual water treatment area.

5. The sediment dewatering device of claim 4, wherein a gravel guide layer, a composite geomembrane layer and a ground substrate layer are sequentially laid on the bottom of the geotextile tube bag from top to bottom, and water drained from the geotextile tube bag is drained into the drainage ditch through the gravel guide layer.