CN106977073B - Ecological dredging integrated system - Google Patents

Ecological dredging integrated system Download PDF

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Publication number
CN106977073B
CN106977073B CN201710129431.1A CN201710129431A CN106977073B CN 106977073 B CN106977073 B CN 106977073B CN 201710129431 A CN201710129431 A CN 201710129431A CN 106977073 B CN106977073 B CN 106977073B
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CN
China
Prior art keywords
sludge
dewatering
ship
thickener
ecological dredging
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CN201710129431.1A
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Chinese (zh)
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CN106977073A (en
Inventor
杜河清
彭瑜
雷勇
高龙华
周小清
马世荣
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Guangzhou Zhuke Academy Of Engineering Survey And Design Co Ltd
Pearl River Hydraulic Research Institute of PRWRC
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Guangzhou Zhuke Academy Of Engineering Survey And Design Co Ltd
Pearl River Hydraulic Research Institute of PRWRC
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Priority to CN201710129431.1A priority Critical patent/CN106977073B/en
Publication of CN106977073A publication Critical patent/CN106977073A/en
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Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/8833Floating installations
    • E02F3/885Floating installations self propelled, e.g. ship
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F5/00Dredgers or soil-shifting machines for special purposes
    • E02F5/28Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
    • E02F5/282Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with rotating cutting or digging tools

Abstract

The invention discloses an ecological dredging integrated system, which comprises a dredger, a dewatering boat and a pumping device, wherein the dredger comprises a dredger body and a pump; the dredger is connected with the dewatering ship through the pumping device, and dredged sludge is conveyed to the dewatering ship; the dewatering ship comprises a ship body, a sand removing device and a dewatering device which are arranged on the ship body, and a dewatered sludge storage device; the pumping device, the sand removing device, the dewatering device and the dewatered sludge storage device are sequentially connected to form a sludge treatment passage. According to the ecological dredging integrated system, silt and dyed bottom mud in a river channel is dug out, dewatered and subjected to a series of treatment, and the dewatered dry mud can be further treated and recycled, so that ecological dredging, reduction, harmless treatment and recycling are realized, and the problems of accumulation and serious pollution of the bottom mud of rivers and lakes are solved.

Description

Ecological dredging integrated system
Technical Field
The invention relates to the technical field of sludge treatment, in particular to an ecological dredging integrated system.
Background
With the development of urban economy, the population is increased, a large amount of various industrial wastewater and domestic sewage are discharged into a river network, the water environment quality is increasingly deteriorated, and the urban economy are a main problem for restricting the sustainable development of the economy. Industrial wastewater and domestic sewage are discharged into river channels, which causes serious pollution to a large number of urban rivers. The deterioration of the water quality of the riverway generates a plurality of adverse effects on the water supply source area, the water environment and the water ecology; the situation is particularly serious in Yangtze river delta and Zhujiang delta areas.
The pollutants enter river channels, lakes and reservoirs, and a large amount of pollutants are deposited on bottom mud to form a new pollution source, so that the self-purification capacity of the water bodies in the river, lake and reservoir is reduced, and the water environment in the river, lake and reservoir is gradually deteriorated; meanwhile, most reservoirs are eutrophicated, which seriously affects the drinking water safety and living environment of people around rivers, lakes and reservoirs, reduces the living quality of people and restricts the construction and development of regional economy.
Therefore, it is necessary to realize ecological dredging, reduction, harmless treatment and resource utilization of the polluted bottom sludge of rivers and lakes, and solve the problems of accumulation and serious pollution of the polluted bottom sludge of rivers and lakes.
Disclosure of Invention
The invention aims to solve the technical problem of providing an ecological dredging integrated system for realizing reduction and harmless treatment of dredging sludge.
The technical scheme adopted by the invention for solving the technical problems is as follows: providing an ecological dredging integrated system, which comprises a dredger, a dewatering boat and a pumping device; the dredger is connected with the dewatering ship through the pumping device, and dredged sludge is conveyed to the dewatering ship;
the dewatering ship comprises a ship body, a sand removing device and a dewatering device which are arranged on the ship body, and a dewatered sludge storage device; the pumping device, the sand removing device, the dewatering device and the dewatered sludge storage device are sequentially connected to form a sludge treatment passage.
Preferably, the dewatering device comprises a box body, a sludge dewatering machine, a thickener and a dosing unit, wherein the sludge dewatering machine and the thickener are arranged in the box body;
the sludge dewatering device is characterized in that an inlet is formed in the box body and is communicated with the thickener and the pumping device, the thickener is connected with the sludge dewatering device, and sludge subjected to concentration treatment is conveyed to the sludge dewatering device.
Preferably, the dosing unit comprises an automatic dosing machine arranged on one side of the concentrator.
Preferably, the dewatering device further comprises a sludge conveying mechanism, the box body is provided with an outlet communicated with the sludge dewatering machine, and the sludge conveying mechanism is connected between the sludge dewatering machine and the dewatered sludge storage device.
Preferably, the dehydrating device further comprises a deodorizing device disposed in the case.
Preferably, the dewatering vessel further comprises a tail water treatment device provided on the hull; the tail water treatment device is connected with the dehydration device.
Preferably, the tail water treatment device comprises a flocculation tank for receiving sewage removed from the sludge from the dewatering device and a sludge blocking and removing machine; and after the sewage is subjected to flocculation treatment in the flocculation tank, the sewage is discharged through the sewage blocking and deslagging machine.
Preferably, the tail water treatment device further comprises a recovery pipeline connected between the trash holding and removing machine and the sand removing device, and the recovery pipeline recovers sludge in the trash holding and removing machine to the sand removing device.
Preferably, the pumping device comprises a delivery pump and a delivery pipeline with one end connected with the delivery pump, and the other end of the delivery pipeline extends to the desanding device;
the delivery pump is arranged on the dredger.
Preferably, the integrated ecological dredging system further comprises a mud barge connected to the dewatering ship by a conveyor belt, and the dewatered mud in the dewatered mud storage device is transported to the mud barge by the conveyor belt.
The invention has the beneficial effects that: a series of treatments such as dredging and dewatering of silt and polluted bottom mud in the river channel, and the further treatment of the dewatered dry mud can be recycled, so that ecological dredging, reduction, harmless treatment and recycling are realized, and the problems of accumulation and serious pollution of the bottom mud in the river and the lake are solved.
After the sewage separated from the sludge is treated, the sewage can be discharged into a pipe network and a wetland after reaching the water body discharge standard, and can also be discharged on site, so that the pollution is reduced.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a connection block diagram of an ecological dredging integrated system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an ecological dredging integrated system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dewatering device in the ecological dredging integrated system according to an embodiment of the invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the integrated ecological dredging system according to an embodiment of the present invention comprises a dredger 10, a dewatering vessel 20, and a pumping device 30; the dredger 10 is connected to the dewatering vessel 20 by a pumping device 30 to transfer the dredged sludge to the dewatering vessel 20. The sludge comprises polluted bottom sludge in watery environments such as riverways, lakes, reservoirs and the like.
The dredger 10 can be a cutter suction dredger, a mechanical dredging cutter is used for cutting a sludge layer at the bottom of a water body, and the cut sludge is sucked in through a suction pipe by a centrifugal slurry pump.
The dewatering vessel 20 may include a hull 21, a sand removing device 22 and a dewatering device 23 provided on the hull 21, a dewatered sludge storage device 24; the pumping device 30, the desanding device 22, the dewatering device 23 and the dewatered sludge storage device 24 are sequentially connected to form a sludge treatment passage; the pumping device 30 delivers the sludge dug by the dredger 10 to the dewatering vessel 20, and the sludge is sequentially subjected to sand removal and dewatering to form dry sludge which can be temporarily stored in the dewatered sludge storage device 24.
The sand removing device 22 performs a preliminary separation treatment on the sludge to separate garbage, gravel, sand and the like therein to obtain slurry-like sludge and reduce damage of the gravel and the like to a filter belt of a subsequent dehydrator. The separated sand and gravel can be put into a water environment, and the garbage can be further integrated and treated.
The desanding device 22 can be a mesh belt type desander.
In this embodiment, the dehydration device 23 is a dehydration facility having a box-type closed structure.
Specifically, as shown in fig. 2 and 3, the dewatering device 23 may include a tank 231, a sludge dewatering machine 232 disposed in the tank 231, a thickener 233, and a chemical adding unit 234 that adds chemicals into sludge to be thickened.
An inlet (not shown) is formed in the box 231 and is communicated with the thickener 233 and the pumping device 30, sludge conveyed by the pumping device 30 enters the thickener 233, a chemical adding unit 234 directly adds chemicals such as a flocculating agent or a curing agent into the sludge of the thickener or the chemicals are added into the sludge in the sludge conveying process, and the sludge added with the chemicals is subjected to conditioning and concentration treatment in the thickener, so that preliminary solid-liquid separation of the sludge is realized, the water content is reduced, and the subsequent dehydration efficiency is improved.
The thickener 233 can comprise a frame, a pump set, a transmission device, a pipeline medicine adding device, a flocculation tank, a concentration host machine, an electric control system and the like which are arranged on the frame; the concentration host machine further comprises a filter cloth device, a deviation correcting device, a discharging device, a cleaning device and the like.
The dosing unit 234 may include an automatic dosing machine, which is provided at one side of the thickener 233, and may add a medicine to the sludge through a pipe or a transfer pump. The automatic dosing machine has an automatic proportioning function and mixes the flocculating agent and the water together according to a certain proportion. The inlet end of the thickener 233 may be provided with a line mixer into which an automatic dosing machine delivers the flocculant to be mixed with the sludge.
The thickener 233 may be connected to the sludge dehydrator 232 through a conveyor 235, and conveys the concentrated sludge to the sludge dehydrator 232 to perform dehydration processing to form dry sludge having a water content of less than 60%. The sludge dehydrator 232 may employ a belt dehydrator.
In addition, the thickener 233 and the sludge dehydrator 232 preferably adopt a flocking filter belt, have the advantages of high treatment efficiency, small volume, water and electricity saving, long service life, wide adaptability to sludge and the like, and are suitable for working on ships.
Further, as shown in fig. 1, the dewatering device 23 may further include a sludge conveying mechanism 236, an outlet communicated with the sludge dewatering machine 232 is provided on the box 231, and the sludge conveying mechanism 236 is connected between the sludge dewatering machine 232 and the dewatered sludge storage device 24.
The sludge conveying mechanism 236 may include a conveyor belt, a motor device for driving the conveyor belt to convey, and the like. The sludge storage device 24 may be a storage tank provided on the hull 21 or a storage space formed on the hull 21; may be located below the dehydration engine 23.
The dehydration unit 23 further includes a deodorization unit 237 provided in the case 231 to purify the air in the case 231. The deodorization device 237 is provided at the vent of the case 231. The deodorizing means 237 may perform deodorization by chemical, biological or ion deodorization, and for example, a spray type deodorizer or an activated carbon adsorbing material may be used.
Further, the dewatering vessel 20 further includes a tail water treatment device 25 provided on the hull 21; the tail water treatment device 25 is connected with the dewatering device 23, and is used for treating the sewage treated by the thickener 233 and the sludge dewatering machine 232 so as to ensure that the sewage reaches the secondary standard of Integrated wastewater discharge Standard (GB 44-1996) and the secondary standard of Water pollution discharge Limit in Guangdong province (DB 44/26-2001). The treated sewage can be discharged into a pipe network, a wetland or a water body on site.
As shown in fig. 1 and 2, the tail water treatment device 25 may include a flocculation tank 251 for receiving sewage from the dewatering device 23, the sewage being removed from the sludge, and a trash and residue remover 252. The flocculation tank 251 is connected with a dirt blocking and removing machine 252, and sewage is discharged through the dirt blocking and removing machine 252 after being flocculated in the flocculation tank 251.
The tail water treatment apparatus 25 may further include a dosing machine 253 that feeds a flocculant into the flocculation tank 251. The dosing machine 253 can automatically dose medicine into the flocculation tank 251. The sewage is flocculated in the flocculation tank 251 by a flocculating agent, and suspended matters in the sewage are coagulated into large-particle aggregates; the sewage containing the aggregates can be directly discharged into the water body after entering the dirt blocking and removing machine 252, and large-particle aggregates and other solid residues are blocked.
Further, the tail water treatment apparatus 25 may further include a recovery pipe connected between the trash holding and removing machine 252 and the sand removing apparatus 22, and the recovery pipe recovers the large-particle aggregates and other solid slag materials caught in the trash holding and removing machine 252 to the sand removing apparatus 22.
The dewatering vessel 20 further includes a generator unit (not shown) provided on the hull 21 and configured to supply power to the sand removing device 22, the dewatering device 23, the tail water treatment device 25, and the like.
It will be appreciated that dewatering vessel 20 may include one or more dewatering devices 23, the number of dewatering devices 23 being dependent upon the volume of hull 21 and the amount of sludge.
As also shown in fig. 1, the pumping device 30 may include a delivery pump 31 (e.g., a slurry pump), a delivery pipe 32 connected to the delivery pump 31 at one end, and the other end of the delivery pipe 32 extending to the desanding device 23. The transfer pump 31 is provided on the dredger 10, and pumps the sludge dug up by the dredger 10 to the dewatering vessel 20.
Further, the integrated ecological dredging system of the present invention may further comprise a hopper barge 40 connected to the dewatering vessel 20 by a conveyor belt 50, and the de-cement (dry sludge) in the de-watered sludge storage device 24 is carried to the hopper barge 40 by the conveyor belt 50. The mud barge 40 can convey the dehydrated dry mud to a sediment solidification station, and the dry mud is further consolidated and then recycled.
Furthermore, the ecological dredging integrated system of the invention can also comprise a sorting device (not shown) for excavating, sorting and removing the construction waste and the waste with larger volume existing in the bank part, thereby being beneficial to the subsequent sludge excavating work. The sorting apparatus may comprise a grab dredger or a bed sweeping apparatus.
When the ecological dredging integrated system works, the dredger 10 is positioned in a water body and then dredged, the dredger 10 is divided into a steel pile positioning transverse dredging construction method and an anchor cable construction method according to the positioning, and the steel pile positioning transverse dredging construction method is preferably adopted. The dredger 10 is provided with two steel piles and two swing cables, one steel pile is used as a main pile and inserted into the river bottom to serve as a swing center of the dredger, transverse dredging is carried out through retraction and release of the left swing cable and the right swing cable, and when the dredger moves forwards, the two steel piles alternately change piles; the track of the excavation plane of the dredger 10 is crescent-shaped.
The sludge dug by the dredger 10 is transferred to the dewatering vessel 20 by a slurry pump, thereby dewatering the sludge and the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (7)

1. An ecological dredging integrated system is characterized by comprising a dredger, a dewatering boat and a pumping device; the dredger is connected with the dewatering ship through the pumping device, and dredged sludge is conveyed to the dewatering ship;
the dewatering ship comprises a ship body, a sand removing device and a dewatering device which are arranged on the ship body, a dewatered sludge storage device and a tail water treatment device which is arranged on the ship body; the pumping device, the sand removing device, the dewatering device and the dewatered sludge storage device are sequentially connected to form a sludge treatment passage; the tail water treatment device is connected with the dehydration device; the sand removing device and the tail water treatment device are respectively positioned at two opposite sides of the dehydration device;
the sand removing device adopts a mesh belt type sand removing machine; the dehydrated mud storage device is a storage tank arranged on the ship body or a storage space formed on the ship body and is positioned below the dehydration device;
the dehydration device comprises a box body, a sludge dehydrator, a thickener and a dosing unit, wherein the sludge dehydrator, the thickener and the dosing unit are arranged in the box body; the box body is provided with an inlet communicated with the thickener and the pumping device, the inlet end of the thickener is provided with a pipeline mixer, and the dosing unit sends a medicament into the pipeline mixer to be mixed with sludge; the thickener is connected with the sludge dehydrator through a conveying belt, and conveys the concentrated sludge to the sludge dehydrator for dehydration treatment to form dry sludge with the water content of less than 60%; the sludge dehydrator adopts a belt dehydrator; the thickener and the sludge dehydrator adopt a hair planting filter belt;
the tail water treatment device comprises a flocculation tank and a sludge blocking and removing machine, wherein the flocculation tank is used for receiving sewage which is removed from sludge from the dewatering device; and after the sewage is subjected to flocculation treatment in the flocculation tank, the sewage is discharged through the sewage blocking and deslagging machine.
2. The integrated ecological dredging system according to claim 1, wherein the dosing unit comprises an automatic dosing machine arranged on one side of the thickener.
3. The integrated ecological dredging system according to claim 1, wherein the dewatering device further comprises a sludge conveying mechanism, an outlet communicated with the sludge dewatering machine is formed in the box body, and the sludge conveying mechanism is connected between the sludge dewatering machine and a dewatered sludge storage device.
4. The integrated ecological dredging system of claim 1, wherein the dewatering device further comprises a deodorizing device disposed within the tank.
5. The integrated ecological dredging system according to claim 1, wherein the tail water treatment device further comprises a recycling pipeline connected between the trash holding and removing machine and the sand removing device, and the recycling pipeline recycles the sludge in the trash holding and removing machine to the sand removing device.
6. The integrated ecological dredging system according to claim 1, wherein the pumping device comprises a delivery pump, a delivery pipe with one end connected with the delivery pump, and the other end of the delivery pipe extends to the sand removing device;
the delivery pump is arranged on the dredger.
7. The integrated ecological dredging system according to any one of claims 1 to 6, further comprising a hopper barge connected to the dewatering vessel by a conveyor belt, and the dewatered sludge in the dewatered sludge storage means is transported to the hopper barge by the conveyor belt.
CN201710129431.1A 2017-03-06 2017-03-06 Ecological dredging integrated system Active CN106977073B (en)

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Publication number Priority date Publication date Assignee Title
CN109867386A (en) * 2019-03-29 2019-06-11 中交上海航道勘察设计研究院有限公司 A kind of waterborne moveable mud conditioning device and treatment process
CN110656672A (en) * 2019-09-27 2020-01-07 孙鹏 Intermittent small-sized automatic integrated efficient deep dewatering dredging ship
CN110644557A (en) * 2019-09-27 2020-01-03 孙鹏 Rice washing bucket type continuous multifunctional integrated dredging and water ecological restoration ship

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060025348A (en) * 2004-09-16 2006-03-21 에스아이비(주) A purifying system for dredged sediment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106277678A (en) * 2016-10-21 2017-01-04 深圳市深水水务咨询有限公司 River bottom mud waterborne moveable processing system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060025348A (en) * 2004-09-16 2006-03-21 에스아이비(주) A purifying system for dredged sediment

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