CN104803572B - The dredging of ephemeral stream heavy metal polluted bed mud and dystopy administering method and system - Google Patents
The dredging of ephemeral stream heavy metal polluted bed mud and dystopy administering method and system Download PDFInfo
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- CN104803572B CN104803572B CN201510237304.4A CN201510237304A CN104803572B CN 104803572 B CN104803572 B CN 104803572B CN 201510237304 A CN201510237304 A CN 201510237304A CN 104803572 B CN104803572 B CN 104803572B
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Abstract
A kind of ephemeral stream heavy metal polluted bed mud dredging and dystopy administering method and system, the method comprises the following steps: (1) on-site investigation；(2) division unit engineering, arranges diversion channel；(3) river bottom mud reservoir and accident bed mud reservoir are built；(4) engineering dredging；(5) modifier treatment is carried out for the bed mud being transported on the bank；(6) bed mud after modifier treatment is carried out mud-water separation；(8) mud after mud-water separation is sieved；(9) recycling；(10) tail water processes；(11) bed mud stable curing stirring；(12) stable curing processes；This system includes bed mud in river dredging system and sludge handling system two parts on the bank.Present invention operation convenient to carry out, has stronger specific aim, and regulation effect is good, will not produce secondary pollution.
Description
Technical field
The present invention relates to one for water bodys such as ephemeral streams (containing river, river, rivers, river course) by heavy metal polluted bed mud
The system and method that dredging and dystopy are administered, belongs to the improvement recovery technique field of polluted bed mud.
Background technology
Bed mud is the superficial deposit material of water bottom, is the mixture of microorganism, humus, soil and silt etc., through long
Time physical chemistry, biological agent and water body transmit and are deposited on water bottom and are formed.Bed mud can reflect that what water body developed goes through
History process, for the important component part of the natural water ecosystems such as river, lake, mouth of the river beach.
Heavy metal in bed mud come from atmospheric falling dust, precipitation, soil erosion, rainwash, all kinds of sewage, solid refuse with
And pesticide etc., there is the features such as chronicity, cumulative bad, latency and irreversibility, can be enriched with by food chain thousands of Radix Achyranthis Bidentatae ground,
Finally it is detrimental to health.Countries in the world are different to control and plan and the Treatment process scheme of Heavy Metal Pollution in Sediments at present,
Especially in China, the factor impact such as contaminated and Economy Contrast, the most do not possess and carry out Heavy Metal Pollution in Sediments comprehensively and administer work
The condition made.
Ephemeral stream also known as ephermeral stream, seasonal river, refer to river in the dry season, river cutout, riverbed exposed；Abundance of water
In season, form current, even flood Pentium.This kind of river generally flows through the region of high temperature and drought, and mean annual discharge is less,
But the flood peak caused because of heavy rain, snow melt is the biggest.Now because of the mankind to the excessive diversion in river, damming to make perennial river become
Ephemeral stream.The continental river of China mostly is ephemeral stream.
Sediment Dredging refer to by regulation dredging scope and dredging depth, take mode manually or mechanically will by heavy metal or other
The engineering that the bed mud (including mud, sand, stone and other foreign material) etc. polluted clears out from the system of waters and is acted upon, dredges
The process of dredging avoids secondary pollution.Sediment Dredging has become polluted bed mud, the primary link that special heavy metal polluted bed mud dystopy is administered.
The most conventional Sediment Dredging technology mainly includes three kinds of forms, i.e. engineering dredging, environmental dredging and ecological dredging.
Engineering dredging technology is commonly divided into the dredging of dry method engineering and wet method engineering is dredged, and wherein, the dredging of dry method engineering has mud extraction
The feature that moisture content is low, volume is little, but the bed mud that improvement basin can be made in its operating process to contain heavy metal is exposed to sky for a long time
In gas, easily surrounding enviroment and operator are produced harm；The dredging of wet method engineering can preferably control the secondary to environment
Pollution problem, but the design form of its Cutters for Dredgers, determine it and water body can be produced bigger disturbance in operation,
So that the polluter in bed mud migrates in overlying water, dredged region water body can be brought adverse effect.Engineering dredging is made
Commonly using dredging method, technology and equipment for current water conservancy industry more ripe, ephemeral stream is had by dry method engineering therein dredging
There is stronger adaptation ability, but owing to dredging scope and the dredging depth of dredging object are controlled less demanding by it, easily cause super
Dig, owe to dig and the problem of Dredging Process secondary pollution.
Technology for environmental dredging has obtained extensive utilization as the most directly, the most quickly removing one of endogenous approach.Such as Chinese patent literary composition
Offer disclosed in a kind of disclosed in CN2837389 " double-suction-port ring protects dredging reamer device ", CN101787720A " a kind of ecological clear
Silt method and Accrete clearing device thereof " and CN103643713A disclosed in a kind of " method of riverbed environmental dredging " etc. in order to reduce dredging
During bed mud spread the secondary pollution problem that causes, have developed double suction mouth reamer, dredging sucker, band cover screw reamer etc. more
Advanced dredger, can substantially meet the requirement that Dredging Process accurately controls, but because above-mentioned dredging technology or equipment typically need
Hull to be equipped with is as carrier, it is adaptable to the dredging working region of certain depth of water, thus limits its application at ephemeral stream
And popularization.
Ecological dredging is a kind of emerging dredging pattern, mainly emphasizes to control the desilting thickness of bed mud, for the people's restoration of the ecosystem that will be situated between from now on
Create conditions, but technical equipment is the most ripe, there is certain environment risk.
Pollution level according to polluted water body is different, in conjunction with the implementation condition of contaminated site, at the bottom of the most conventional heavy metal pollution
The recovery technique of mud is broadly divided into Treatment process and dystopy Treatment process in situ.
Treatment process mainly includes phytoremediation and in-situ materials soverlay technique in situ in situ, and its situ phytoremediation is with its cost
Low, simple to operate, be not likely to produce the advantages such as secondary pollution and receive much concern, but still suffer from that treatment effeciency is low, plant growing is easily subject to
The defects such as local climate, river course flood situation impact.In-situ materials soverlay technique is to cover passivating material on bed mud surface, blocks
Heavy metal delivery pathways in water body, is affected relatively big by the water conservancy hydrological characteristics of the physicochemical property and natural water that cover material,
And there is no covering material dispensing device reliably at present, it is achieved the most even bigger without leak source covering difficulty.Therefore, for polluting relatively
When heavy water body or original position difficulty of governance are bigger, frequently with dystopy Treatment process.
Dystopy Treatment process is a kind of " Ex-situ remediation method of heavy metal polluted bed mud " as disclosed in CN102372406, mainly by
Sediment digging and conveying, the antiseepage of reparation district and draining, bed mud modifying agent and microorganism fungus kind adds, microorganism and plant combined repair
Multiple, waste water processes and plant harvesting and incineration disposal unit composition；Comprise the concrete steps that the addressing and Anti-seeping technology first carrying out repairing district,
Use engineering method that heavy metal polluted bed mud is dredged again and be transported to repair district, then carrying out the discharging consolidation process of bed mud, so
After add bed mud modifying agent and microorganism fungus kind and be sufficiently mixed with bed mud and cultivate plant, finally harvesting plant after being burned,
It is transported to hazardous waste landfill landfill or for reclaiming heavy metal element burning ash.The method is by the dredging of bed mud dystopy and plant
Absorption processing method combines, and compared with polluted bed mud chemical treatment method, has processing cost advantage low, eco-friendly,
But owing to needs are dredged, it is easily generated pollution release in Dredging Process, affects Upper water's quality；It addition, for pollution level
Heavier bed mud, plant is difficult in bed mud growth, also limit the application of the method.
Therefore, need badly for ephemeral stream, on the basis of detailed sediment pollution on-site investigation and hydrologic survey, according to a huge sum of money
Belonging to pollution and process disposal requirement, exploitation is suitable for ephemeral stream hydrologic condition and the Sediment Dredging of heavy metal polluted bed mud and dystopy is controlled
Reason administering method and system thereof.
Summary of the invention
The present invention is directed to current ephemeral stream and lack system and heavy metal pollution dredging and bed mud Treatment process targetedly
Problem, it is provided that a kind of systematicness, specific aim and motility are strong, regulation effect good, ephemeral stream convenient to carry out is heavy metal-polluted
Contaminate Sediment Dredging and dystopy administering method and system.
The ephemeral stream heavy metal polluted bed mud dredging of the present invention and dystopy administering method, comprise the following steps:
(1) first the river course of dredging target section is carried out mapping and Heavy Metal Pollution in Sediments on-site investigation, be simultaneous for
Target section carries out detailed River Hydrology investigation, then according to engineering construction condition is to whole target river reach's dividing element project；
Engineering construction condition includes river topography landforms, hydrologic condition and interim disposal field condition；
(2) by section cofferdam, whole dredging target section enclosing, use between unit cofferdam between the unit engineering that will divide
Every (banking up and form in section cofferdam and unit cofferdam channel deposits and other sandstone material), set in centrage both sides, river course or one side
Putting diversion channel, diversion channel runs through whole dredging target section；River is so made to utilize the guide effect of cofferdam and diversion channel to flow smoothly
Enter downstream, keep the normal flood passage function in river to the full extent；
The section of diversion channel designs according to the requirement of the maximum water flow of construction period correspondence section, and concrete flow is according to river two
Bank correspondence run-off determines.
(3) at least one river bottom mud reservoir of each element project internal construction and at least one accident bed mud reservoir, in river
Road bed mud reservoir is installed mud lift pump, installation accident mud lift pump in accident bed mud reservoir；River bottom mud reservoir is used for
Bed mud mud in Dredging Process is collected, with satisfied lifting needs；Accident bed mud reservoir is for avoiding construction period to meet with
Extreme weather (heavy rain etc.), causes polluted river water to pollute and arrange (at the bottom of accident with letting out section uncontaminated to downstream under current
Mud reservoir can share with several element projects)；
The position of river bottom mud reservoir is to be advisable near sediment pollution region, and volume can arrange in conjunction with the duration, according to element project amount
Determine with elevator pump flow.The particular location of accident bed mud reservoir combines river course actual landform landforms and arranges flexibly.
Compacting at the bottom of the pond of river bottom mud reservoir or laying sand stone layer, become silted up to meet in engineering machinery turnover and labor cleaning's work progress
Long-pending mud requirement, and use wear-resisting water proof material to carry out Anti-seeping technology, to prevent under in bed mud, heavy metal is with oozing impurely under water
Water.
The concrete volume of accident bed mud reservoir is combined according to the element project catchment area in the range of local storm intensity, run-off and service
Conjunction determines, it is possible to meet the water-retention requirement under the accident condition of whole target section.The particular location of accident bed mud reservoir combines river course
Actual landform landforms are arranged flexibly.
Compacting at the bottom of the pond of accident bed mud reservoir or laying sand stone layer, become silted up to meet in engineering machinery turnover and labor cleaning's work progress
Long-pending mud requirement, and use wear-resisting water proof material to carry out Anti-seeping technology, to prevent under in bed mud, heavy metal is with oozing impurely under water
Water.
(4) start unit engineering dredging, uses high pressure to wash away water pump or geotechnique's machinery, wants according to dredging scope and dredging depth
Ask and bed mud is carried out engineering dredging operation；
When possessing sluicing operating condition, use high pressure to wash away the bed mud after water pump will wash away and pour river bottom mud reservoir；Pass through
The screen cloth of river bottom mud reservoir water inlet end, screens out partial particulate (particle diameter ＞ 1cm or determine according to mesh size), and other bed mud enters
Enter river bottom mud reservoir, be promoted on the bank；When not possessing sluicing operating condition, geotechnique's machinery is used to carry out dredging operation,
The bed mud excavated or the mix and blend that adds water possess lifting condition laggard enter river bottom mud reservoir, or be directly transported on the bank；
Affected by extreme weather cause a certain element project by rain drop erosion serious time, by excess polluted bed mud deliver to accident bed mud reservoir
Temporary, accident condition is delivered on the bank after terminating the most in the lump；
(5) whole dredging work terminates and after acceptance(check), removes unit cofferdam, section cofferdam, diversion channel, river bottom mud
Reservoir and accident bed mud reservoir；
(6), before the bed mud after dredging processes disposal on the bank, first pass through test in laboratory analysis and field pilot test, determine
The content situation of heavy metal in the particle diameter distribution situation of bed mud and different-grain diameter bed mud after the dredging of target section；Then by situations below
Process respectively:
Bed mud for being dug out by geotechnique's machinery in step (4):
1., when the particle diameter wherein contained is more than the mass fraction of the cobble of 4.75mm more than or equal to 10%, river drip washing is used,
The cobble washed out or rubble are detected analysis heavy metal content, if content of beary metal exceeds standard, then adds chemical leaching liquid (EDTA
Deng), bed mud is carried out chemical leaching, until the heavy metal in the cobble washed out or rubble meets building materials and uses standard, transports outward resource
Change and utilize；
2. when the particle diameter wherein the contained cobble more than 4.75mm mass fraction less than particle diameter in 10%, and bed mud be 1.18mm～
When the mass fraction of the coarse sand of 4.75mm and the particle diameter cobble more than 4.75mm is less than 10%, then bed mud is made directly to carry out modifier treatment；
3. when the particle diameter wherein the contained cobble more than 4.75mm mass fraction less than particle diameter in 10%, and bed mud be 1.18mm～
When the mass fraction of the coarse sand of 4.75mm and the particle diameter cobble more than 4.75mm is more than or equal to 10%, then river is used to drench bed mud
Wash, the cobble washed out and coarse sand are detected analysis heavy metal content, if content of beary metal exceeds standard, then bed mud is carried out chemistry pouring
Wash, until the heavy metal in the cobble washed out and coarse sand meets building materials and uses standard, transport outward recycling；After washed-out sand processes
Bed mud carries out modifier treatment；
(7) for the bed mud after scrubbed process in step (6):
1., when coarse sand mass fraction therein is less than 10%, modifier treatment is directly carried out；
2. when coarse sand mass fraction therein is more than or equal to 10%, bed mud is used river drip washing, to the coarse sand detection washed out
Analysis heavy metal content, if content of beary metal exceeds standard, then carries out chemical leaching to bed mud, until the huge sum of money in the coarse sand washed out
Belong to and meet building materials use standard, transport outward recycling；Bed mud after drip washing carries out modifier treatment.
(8) for step (4) is washed away bed mud and the bed mud that accident bed mud reservoir is temporary, the pumping of acquirement through high-pressure hydraulic
After on the bank, carry out drip washing process according to the process of step (6) and step (7), or directly carry out modifier treatment；
(9) mud after modifier treatment carries out muddy water precipitate and separate；
(10) for the supernatant after step (9) precipitate and separate, process respectively by situations below:
1. do not contain leacheate and meet discharge standard, directly discharging；
2. do not contain leacheate but do not meet discharge standard, process rear discharge up to standard；
3. contain chemical leaching liquid, do not possess leacheate recovery value, but meet discharge standard, directly discharge；
4. contain chemical leaching liquid, do not possess leacheate recovery value, but do not meet discharge standard, process rear discharge up to standard；
5. contain chemical leaching liquid, possess leacheate recovery value, process；Leacheate after process meets recycling
Require, recycle；Leacheate after process can not meet use requirement, but meets what discharge water body required, direct draining
Neighbouring water body；Leacheate after process can not meet use requirement, can not meet again discharge water body requirement, after processing
Qualified discharge；
(11) mud after step (9) precipitate and separate is processed respectively by situations below:
1. when the medium-fine sand that the particle diameter wherein contained is 0.075mm～1.18mm and the cobble not screened out and the mass fraction of coarse sand
During more than or equal to 10%, medium-fine sand and cobble and coarse sand are screened out；To the detection point of the cobble sifted out, coarse sand and medium-fine sand
Analysis content of beary metal, if content of beary metal meets building materials and uses standard, directly transports outward recycling, if content of beary metal
Exceeding standard, then by stabilizer (chelating agen, polysulfide etc.), bed mud is carried out stabilized treatment, the bed mud after stablizing meets relevant
After disposing (Land_use change, burn, landfill etc.) standard, outward transport is rationally disposed；
2. when the mass fraction of the medium-fine sand wherein contained and the cobble not screened out and coarse sand less than particle diameter in 10%, and bed mud it is
When the mass fraction of the thick mud of 0.020mm～0.075mm and medium-fine sand, cobble and coarse sand is less than 10%, carry out solid-liquid separation；
3. when the mass fraction of the medium-fine sand wherein contained and the cobble not screened out and coarse sand is less than 10%, but thick mud in mud, in
When the mass fraction of fine sand, cobble and coarse sand is more than 10%, being screened out by thick mud therein, the thick mud detection to sifting out is analyzed
Content of beary metal, if outward transport is rationally disposed, under sieve after meeting and relevant dispose (Land_use change, burn, landfill etc.) standard
Mud carries out solid-liquid separation, if heavy metals exceeding standard, is then carried out bed mud surely by stabilizer (chelating agen, polysulfide etc.)
Fixed process, stable after bed mud meet and relevant dispose (Land_use change, burn, landfill etc.) standard after outward transport dispose；
(12) for the mud after solid-liquid separation, nurse one's health by adding flocculant；For the supernatant after solid-liquid separation,
Then process respectively by situations below:
1. without stabilizer in supernatant, and meet discharge standard, directly discharge；
2. without stabilizer in supernatant, but do not meet discharge standard, process rear discharge up to standard；
3. containing stabilizer in supernatant, do not possess stabilizer recovery value, but meet discharge standard, directly discharge；
4. containing stabilizer in supernatant, do not possess stabilizer recovery value, but do not meet discharge standard, process heel row up to standard
Put；
5. containing stabilizer in supernatant, possess stabilizer and reclaim what use required, recycle；
(13) mud after conditioning uses mechanical dewatering equipment to be dehydrated；
Supernatant for after dehydration:
1. without stabilizer in supernatant, and meet discharge standard, directly discharge；
2. without stabilizer in supernatant, but do not meet discharge standard, process rear discharge up to standard；
3. containing stabilizer in supernatant, do not possess stabilizer recovery value, but meet discharge standard, directly discharge；
4. containing stabilizer in supernatant, do not possess stabilizer recovery value, but do not meet discharge standard, process heel row up to standard
Put；
5. containing stabilizer in supernatant, possess stabilizer and reclaim what use required, recycle；
Mud cake for after dehydration:
1. meeting the standard-required in final disposal place such as the bed mud after dehydration, outer running is rationally disposed；
2. can not directly meet the standard-required in final disposal place such as the bed mud after dehydration, then make moisture content meet follow-up stable solid
Change stirring and require laggard line stabilization cured；
(14) bed mud after dehydration and stabiliser solution carry out being sufficiently mixed stirring reaction, carry out stable curing process, stable solid
Bed mud after change process should meet the standard-required in final disposal place.
Realize the ephemeral stream heavy metal polluted bed mud dystopy governing system of said method, by the following technical solutions:
This system, including bed mud in river dredging system and sludge handling system two parts on the bank:
Bed mud in river dredging system includes river bottom mud reservoir, accident bed mud reservoir, mud lift pump and accident mud lift pump,
River bottom mud reservoir includes mud inlet end successively, crosses stream gallery and mud outlet end, and mud inlet end is provided with at least one screen cloth, and mud outlet end sets
Being equipped with collection mud pit, collection is provided with bed mud mud lift pump in mud pit, installation accident mud lift pump, bed mud in accident bed mud reservoir
Mud lift pump and accident mud lift pump all mix tune by pipeline with the roller-type stone washing machine in sludge handling system on the bank or mud
Matter pond connects；
Sludge handling system includes roller-type stone washing machine, collection mud sump, screw sand washer, the molten medicine device of leacheate, ring waste on the bank
Reaction tank, leacheate precipitate recovery pond, mud mixes quenched pond, mud-settling pit, vibrosieve, hydrocyclone, mud are dense
Contracting pond, mud conditioner, mechanical dewatering equipment, stable curing mixing plant, tail water chemical reaction pond, tail water chemical precipitation pond,
The molten medicine device of flocculant and the molten medicine device of stabilizer；All molten with the leacheate medicine device of roller-type stone washing machine and screw sand washer is connected；Rolling
Cylinder stone scrubber is connected with collection mud sump；Collection mud sump is connected with screw sand washer by the elevator pump set within it；Screw sand washer,
Mud mixes quenched pond, mud-settling pit, ring waste reaction tank and leacheate precipitation recovery pond and is sequentially connected with；Mud-settling pit
It is connected with ring waste reaction tank；Mud-settling pit is connected with vibrosieve by the elevator pump set within it, and vibrosieve is by carrying
Rise pump to be connected with hydrocyclone, hydrocyclone, mud concentration basin, mud conditioner, mechanical dewatering equipment and stable curing
Mixing plant is sequentially connected with；Mud concentration basin, tail water chemical reaction pond and tail water chemical precipitation pond are sequentially connected with；The molten medicine of stabilizer
Device is connected with vibrosieve；The molten medicine device of flocculant is connected with sludge conditioning pond.
The degree of depth crossing stream gallery of river bottom mud reservoir is usually no more than 0.5m, and the gradient is not less than 0.1%, in order to bed mud is smooth
Cross stream and carry out manually or mechanically desilting when depositing serious.
The present invention fully combines the technology implementation difficulty of ephemeral stream Sediment Dredging and improvement, by primary abatement sport technique segment module
Change, can be in conjunction with specified conditions at place, selection, operation convenient to carry out flexibly.Have the following characteristics that
The most fully combine the control requirement that the hydrologic condition of ephemeral stream, execution conditions and heavy metal polluted bed mud are administered, solve
Current ephemeral stream heavy metal polluted bed mud Treatment process specific aim and the not enough situation of motility.
2. take into full account work progress contingent various factors such as rainstorm weather etc., fully present Heavy Metal Pollution Control
The systematicness of work.
3. fully combine local specified conditions, there is stronger specific aim.
Present invention operation convenient to carry out, has stronger specific aim and motility, and regulation effect is good, will not produce secondary pollution.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of ephemeral stream heavy metal polluted bed mud dystopy governing system of the present invention.
In figure: 1, section cofferdam, 2, river bottom mud reservoir, 3, element project, 4, accident bed mud reservoir, 5, unit cofferdam,
6, diversion channel, 7, close bed mud transport vehicle, 8, roller-type stone washing machine, 9, collection mud sump, 10, screw sand washer, 11, drip washing
The molten medicine device of liquid, 12, mud mix quenched pond, 13, mud-settling pit, 14, ring waste reaction tank, 15, leacheate sinks
Shallow lake recovery pond, 16, high frequency linear vibrosieve, 17, hydrocyclone, 18, mud concentration basin, 19, mud conditioner, 20,
Mechanical dewatering equipment, 21, stable curing mixing plant, 22, tail water chemical reaction pond, 23, tail water chemical precipitation pond, 24,
The molten medicine device of flocculant, 25, the molten medicine device of stabilizer.
Detailed description of the invention
With reference to " cobble for building, rubble " (GB14685～2011) and " building sand " (GB14684～2011) standard,
According to bed mud size, typically bed mud can be divided into cobble, sand and mud, wherein cobble refers to by weathering, potamic transport
Rock particles that formed with sorting, accumulation, that particle diameter is more than 4.75mm；Sand refers to what nature generated, through man-made recovery and screening
Particle diameter is more than 0.75mm, less than the rock particles of 4.75mm, including fluvial sand, lake sand, mountain sand, desalted sea sand, but does not includes
Soft, the rock particles of air slaking；Mud refers to that particle diameter is less than the rock particles of 0.75mm, including fluvial sand, lake sand, mountain sand, desalination sea
Sand, but do not include soft, the rock particles of air slaking.
With reference to above-mentioned standard, sand can be divided into again according to size the coarse sand of 1.18mm～4.75mm, particle diameter 0.075mm～
In 1.18mm, fine sand；Mud is divided into according to size thick mud and the thin mud of below 0.02mm of 0.02mm～0.075mm；
Experimental studies have found that, in bed mud, the heavy metal contaminants primary attachment of more than 70% is less than the mud granule of 0.02mm at particle diameter
On, zones of different, different bed mud types, above-mentioned absorption particle size range is slightly different.
The ephemeral stream heavy metal polluted bed mud dredging of the present invention and dystopy governing system, including bed mud in river dredging system and bank
Upper sludge handling system two parts, the most as shown in Figure 1.
Bed mud in river dredging system, including river bottom mud reservoir 2 and accident bed mud reservoir 4.River bottom mud reservoir 2 is for dredging
Bed mud mud during dredging is collected, with satisfied lifting needs.Accident bed mud reservoir 4 is for avoiding construction period to meet with pole
End weather (heavy rain etc.), causes polluted river water to pollute and arrange with letting out section uncontaminated to downstream under current.
River bottom mud reservoir 2 is provided with bed mud mud lift pump, installation accident mud lift pump, the end in accident bed mud reservoir 4
Mud mud lift pump and accident mud lift pump are all mixed with the roller-type stone washing machine 1 in sludge handling system on the bank or mud by pipeline
Close quenched pond 5 to connect.River bottom mud reservoir 2 includes mud inlet end successively according to crossing stream order, crosses stream gallery and mud outlet end；Enter mud
End is provided with at least one screen cloth；The degree of depth crossing stream gallery is usually no more than 0.5 meter, and the gradient is not less than 0.1%, in order to bed mud
Cross stream smoothly and carry out manually or mechanically desilting when depositing serious；Mud outlet end is provided with collection mud pit, promotes water pump for mud
Promoting, be provided with mud lift pump in collection mud pit, collection mud pit volume is according to the flow rate calculation of the mud lift pump used.
Anti-seeping technology is carried out, to prevent in bed mud heavy metal with oozing under water at the bottom of the pond of river bottom mud reservoir 2 and accident bed mud reservoir 4
Polluted underground water.
Sludge handling system on the bank, including roller-type stone washing machine 8, collection mud sump 9, screw sand washer 10, the molten medicine device of leacheate 11,
Mud mix quenched pond 12, mud-settling pit 13, ring waste reaction tank 14, leacheate precipitation recovery pond 15, vibrosieve 16,
Hydrocyclone 17, mud concentration basin 18, sludge conditioning pond 19, mechanical dewatering equipment 20, stable curing mixing plant 21,
Tail water chemical reaction pond 22, tail water chemical precipitation pond 23, the molten medicine device of flocculant 24 and the molten medicine device of stabilizer 25.Cylinder is washed
All molten with the leacheate medicine device 11 of stone machine 8 and screw sand washer 9 is connected.Roller-type stone washing machine 8 is connected with collection mud sump 9, collects mud sump
9 are connected with screw sand washer 10 by the elevator pump set within it.Screw sand washer 10, mud mixing quenched pond 12, mud
Slurry sedimentation tank 13, ring waste reaction tank 14 and leacheate precipitation recovery pond 15 are sequentially connected with, and mud-settling pit 13 is by setting
Put elevator pump within it to be connected with vibrosieve 16.Vibrosieve 16 is connected with hydrocyclone 17 by elevator pump, hydraulic cyclone
Device 17, mud concentration basin 18, mud conditioner 19, mechanical dewatering equipment 20 and stable curing mixing plant 21 are sequentially connected with.
Mud concentration basin 18, tail water chemical reaction pond 22 and tail water chemical precipitation pond 23 are sequentially connected with.The molten medicine device of stabilizer 25 with
Vibrosieve 16 connects.The molten medicine device of flocculant 24 is connected with sludge conditioning pond 19.Vibrosieve 16 can use high frequency linear to shake
Dynamic sieve.The molten medicine device of leacheate 11, the molten medicine device of stabilizer 25 medicine device molten with flocculant 24 can use existing integrated
Dissolving medicine feeding device.Mechanical dewatering equipment 20 can use filter press and centrifugal dehydrator etc..Stable curing mixing plant
21 can use various blender.
The specific implementation process that said system carries out ephemeral stream heavy metal polluted bed mud dredging and dystopy improvement is as described below.
(1) first the river course of dredging target section is carried out mapping and Heavy Metal Pollution in Sediments on-site investigation, be simultaneous for
Target section carries out detailed River Hydrology investigation, then according to whole target river reach's dividing is become several single by engineering construction condition
Unit's engineering 3.Engineering construction condition includes river topography landforms, hydrologic condition and interim disposal field condition；
(2) by section cofferdam 1 enclosing at whole dredging target section use front and back two, between the unit engineering 3 that will divide
It is spaced with vertical or horizontal unit cofferdam 5.Section cofferdam 1 and the unit cofferdam 5 material heaps such as channel deposits and other sandstone
Put and form, diversion channel 6 (being to be respectively provided with diversion channel 6 in both sides in Fig. 1), diversion channel are set in centrage both sides, river course or one side
Pass through 6 and wear whole dredging target river.River is so made to utilize the guide effect of cofferdam and diversion channel 6 to flow into downstream, maximum journey smoothly
The normal flood passage function in river is kept on degree.
The section of diversion channel 6 designs according to the requirement of the maximum water flow of construction period correspondence section, and concrete flow is according to river
Two sides correspondence run-off determines.
(3) in each element project 3 internal construction river bottom mud reservoir 2 and accident bed mud reservoir 4, in river bottom mud reservoir 2
Middle installation bed mud mud lift pump, installation accident mud lift pump in accident bed mud reservoir 4.River bottom mud reservoir 2 is for right
Bed mud mud in Dredging Process is collected, with satisfied lifting needs.Accident bed mud reservoir 4 is for avoiding construction period to meet with
Extreme weather (heavy rain etc.), causes polluted river water to pollute and arrange (at the bottom of accident with letting out section uncontaminated to downstream under current
Mud reservoir 4 can share with several element projects).
River bottom mud reservoir 2 includes mud inlet end successively according to crossing stream order, crosses stream gallery and mud outlet end；Mud inlet end is provided with at least
One screen cloth；Cross stream gallery the degree of depth be usually no more than 0.5 meter, the gradient is not less than 0.1%, in order to bed mud smooth cross stream and
Manually or mechanically desilting is carried out when depositing serious；Mud outlet end is provided with collection mud pit, promotes the lifting of water pump for mud, collects mud pit
Volume is according to the flow rate calculation of the mud lift pump used.The concrete volume of river bottom mud reservoir 2 combines duration arrangement, according to list
Unit's quantities and elevator pump flow determine.The particular location of river bottom mud reservoir 2 combines river course actual landform landforms and arranges flexibly.
The concrete volume of accident bed mud reservoir 4 is according to the element project catchment area in the range of local storm intensity, run-off and service
Comprehensively determine, it is possible to meet the water-retention requirement under the accident condition of whole target section.The particular location of accident bed mud reservoir 4 combines
River course actual landform landforms are arranged flexibly.
Compacting at the bottom of the pond of river bottom mud reservoir 2 and accident bed mud reservoir 4 or laying sand stone layer, to meet engineering machinery turnover and people
The mud requirement of alluvial in work cleaning work progress, and use wear-resisting water proof material to carry out Anti-seeping technology, to prevent a huge sum of money in bed mud
Belong to oozing polluted underground water under water.
(4) dredging of start unit engineering 3, when using high pressure to wash away operation, the bed mud after washing away is directly entered river bottom mud
Reservoir；By the screen cloth of river bottom mud reservoir water inlet end, screen out larger particles (＞ 1cm or determine according to mesh size), other
Bed mud enters collection mud pit, water side along the stream gallery of crossing of river bottom mud reservoir, delivers to specify on the bank position by elevator pump.Do not possess
Sluicing operation, when using geotechnique's mechanical work, bed mud both can pass through simple bed mud mixed stirring device, by containing of excavating
The bed mud of water rate relatively low (general about 55%) adds water and is mixed into the bed mud that moisture content higher (general about 90%) is available for promoting
After be pumped into river bottom mud reservoir, it is possible to be directly transported to specify on the bank position.Affected by extreme weather and caused a certain element project
By rain drop erosion serious time, startup accident mud lift pump, the polluted bed mud of excess is delivered to accident bed mud reservoir is kept in, accident
State is pumped to specify position on the bank after terminating the most in the lump.
The dry season as far as possible choosing suitable construction carries out engineering construction.
(5) whole dredging work terminates and after acceptance(check), removes unit cofferdam 5, section cofferdam 1, diversion channel 6, river course
Bed mud reservoir 2 and accident bed mud reservoir 4.
(6), before the bed mud after dredging processes disposal on the bank, test in laboratory analysis and field pilot-scale are first passed through, really
Set the goal after the dredging of section the content situation of heavy metal in the particle diameter distribution situation of bed mud and different-grain diameter bed mud.
Bed mud for being dug out by geotechnique's machinery in step (4):
1. when cobble (the particle diameter ＞ 4.75mm) content wherein contained is more (mass fraction is more than 10%), by closing the end
Mud transport vehicle 7 is transported to roller-type stone washing machine 8, uses river drip washing, and the cobble washed out or rubble are detected analysis heavy metal content,
If content of beary metal exceeds standard, then add chemical leaching liquid (EDTA etc.) by the molten medicine device of leacheate 11 to roller-type stone washing machine 8,
Bed mud is carried out chemical leaching, until the heavy metal in the cobble washed out meets building materials and uses standard, transports outward recycling.
2. when cobble (the particle diameter ＞ 4.75mm) content wherein contained less (mass fraction is less than 10%), and bed mud medium coarse sand
(1.18mm ＜ particle diameter ＜ 4.75mm) and time cobble content is less (mass fraction is less than 10%), bed mud is directly entered mud mixing
Regulating reservoir 12；
3. when the cobble wherein contained or rubble (particle diameter ＞ 4.75mm) content less (mass fraction is less than 10%), but bed mud
Medium coarse sand (1.18mm ＜ particle diameter ＜ 4.75mm) and time cobble content is more (mass fraction is more than 10%), bed mud enters screwed washing
Sand machine 10, uses river to carry out drip washing, and the cobble washed out and coarse sand are detected analysis heavy metal content, if content of beary metal surpasses
Mark, then add chemical leaching liquid (EDTA etc.) to screw sand washer 10, to bed mud by the molten medicine device of leacheate 11
Learn drip washing, until the heavy metal in the cobble washed out and coarse sand meets building materials and uses standard, transport outward recycling.Washed-out sand processes
After bed mud enter mud mixing regulating reservoir 12.
(7) for the bed mud after scrubbed process in step (6):
1. when coarse sand therein (1.18mm ＜ particle diameter ＜ 4.75mm) content is less (mass fraction is less than 10%), directly enter
Enter mud mixing regulating reservoir 12；
2. (mass fraction is more than 10%), bed mud warp when coarse sand therein (1.18mm ＜ particle diameter ＜ 4.75mm) content is more
Collection mud sump 9 enters screw sand washer 10, uses river drip washing, to the coarse sand detection analysis heavy metal content washed out, if a huge sum of money
Belong to content overproof, then add chemical leaching liquid (EDTA etc.) to screw sand washer 10, the end of to by the molten medicine device of leacheate 11
Mud carries out chemical leaching, until the heavy metal in the coarse sand washed out meets building materials and uses standard, transports outward recycling.After drip washing
Bed mud enter mud mixing regulating reservoir 12.
(8) for step (4) is washed away bed mud and the temporary bed mud of accident bed mud reservoir 4, the warp of acquirement through high-pressure hydraulic
After elevator pump is transported on the bank, carries out drip washing process according to the process of step (6) and step (7), or be directly entered mud
Mixing regulating reservoir 12.
(9) after mud mixing regulating reservoir 12 modifier treatment, enter mud-settling pit 13, carry out muddy water precipitate and separate.
(10) for the supernatant after step (9) precipitate and separate:
1. when wherein not containing leacheate, and meet discharge standard, directly discharge；
2. when wherein not containing leacheate, but do not meet discharge standard, enter tail water treatment system and process, rear discharge up to standard；
3. when wherein containing chemical leaching liquid, do not possess leacheate recovery value, but meet discharge standard, directly discharge；
4. when wherein containing chemical leaching liquid, do not possess leacheate recovery value, but do not meet discharge standard, enter at tail water
Reason system processes, qualified discharge after process；
5. when wherein containing chemical leaching liquid, possess leacheate recovery value, enter ring waste reaction tank 14 and process；
Leacheate after process can meet what recycling required, reclaims sedimentation tank 15 by leacheate and enters the integration molten medicine of leacheate
Device 11 recycles.Leacheate after process can not meet use requirement, can meet discharge water body requirement, can be direct
Water body near draining up to standard.Leacheate after process can not meet use requirement, can not meet again discharge water body requirement, warp
Tail water chemical reaction pond 22 delivered to by elevator pump and tail water chemical precipitation pond 23 process after qualified discharge.
(11) to the mud after step (9) precipitate and separate:
1. when the medium-fine sand (0.075mm ＜ particle diameter ＜ 1.18mm) wherein contained and the cobble not screened out and coarse sand content are more
(mass fraction is more than 10%), the cobble and the coarse sand that by medium-fine sand therein and are not screened out by high frequency linear vibrosieve 16 are carried out
Screen out, the cobble sifted out, coarse sand and medium-fine sand are detected analysis heavy metal content, if content of beary metal meets building materials and uses mark
Standard, directly transports outward recycling, if content of beary metal exceeds standard, then right by stabilizer (chelating agen, polysulfide etc.)
Bed mud carries out stabilized treatment, stable after bed mud meet and relevant dispose (Land_use change, burn, landfill etc.) standard after outward transport close
Reason is disposed.
2. when the medium-fine sand (0.075mm ＜ particle diameter ＜ 1.18mm) wherein contained and the cobble not screened out and coarse sand content are less
(mass fraction is less than 10%), and in bed mud, thick mud (0.020mm ＜ particle diameter ＜ 0.075mm), medium-fine sand, cobble and coarse sand contain
When measuring less (mass fraction is less than 10%), bed mud is directly entered mud concentration basin 18.
3. when the medium-fine sand (0.075mm ＜ particle diameter ＜ 1.18mm) wherein contained and the cobble not screened out and coarse sand content are less
(mass fraction is less than 10%), and in bed mud, thick mud (0.020mm ＜ particle diameter ＜ 0.075mm), medium-fine sand, cobble and coarse sand contain
When measuring bigger (mass fraction is more than 10%), bed mud enters hydrocyclone 17, screens out, thick mud therein to sift out
Thick mud detection analysis heavy metal content, if outward transport is rationally after meeting and relevant dispose (Land_use change, burn, landfill etc.) standard
Disposing, the mud under sieve is directly entered mud concentration basin 18, if heavy metals exceeding standard, then by stabilizer (chelating agen, many sulfur
Compound etc.) bed mud is carried out stabilized treatment, stable after bed mud meet and relevant dispose (Land_use change, burn, landfill etc.) mark
After standard, outward transport is rationally disposed；
(12) mud carries out solid-liquid separation in mud concentration basin 18；
Supernatant for after solid-liquid separation:
1. without stabilizer in supernatant, and meet discharge standard, directly discharge；
2. without stabilizer in supernatant, but do not meet discharge standard, enter tail water treatment system and process, heel row up to standard
Put；
3. containing stabilizer in supernatant, do not possess stabilizer recovery value, but meet discharge standard, directly discharge；
4. containing stabilizer in supernatant, do not possess leacheate recovery value, but do not meet discharge standard, enter tail water and process
System processes, rear discharge up to standard；
5. containing stabilizer in supernatant, possess stabilizer and reclaim what use required, enter at the molten medicine device of stabilizer 25
Reason reclaims.
The bed mud mud that concentration after concentration is higher enters mud conditioner 19, is nursed one's health to mud by the molten medicine device of flocculant 24
Pond 19 adds flocculant, mud is nursed one's health.
(13) mud after conditioning uses mechanical dewatering equipment 20 to be dehydrated；
Supernatant for after dehydration:
1. without stabilizer in supernatant, and meet discharge standard, directly discharge；
2. without stabilizer in supernatant, but do not meet discharge standard, enter tail water treatment system and process, reach after process
Mark discharge；
3. containing stabilizer in supernatant, do not possess stabilizer recovery value, but meet discharge standard, directly discharge；
4. containing stabilizer in supernatant, do not possess leacheate recovery value, but do not meet discharge standard, enter tail water and process
System processes, qualified discharge after process；
5. containing stabilizer in supernatant, possess stabilizer and reclaim what use required, enter at the molten medicine device of stabilizer 25
Reason reclaims；
Mud cake for after dehydration:
1. meeting the standard-required in final disposal place such as the bed mud after dehydration, outer running is rationally disposed；
2. can not directly meet the standard-required in final disposal place such as the bed mud after dehydration, then make bed mud moisture content meet follow-up surely
Fixed solidification stirring enters bed mud stable curing agitating device after requiring and carries out stable curing process.
(14) bed mud after dehydration and stabiliser solution carry out being sufficiently mixed stirring reaction, carry out stable curing process, stable solid
Bed mud after change process should meet the standard-required in final disposal place.
Claims (3)
1. the dredging of ephemeral stream heavy metal polluted bed mud and a dystopy administering method, is characterized in that, comprise the following steps:
(1) river course of dredging target section is carried out mapping and Heavy Metal Pollution in Sediments on-site investigation, be simultaneous for target section and carry out detailed River Hydrology investigation, then according to engineering construction condition is to whole target river reach's dividing element project；Engineering construction condition includes river topography landforms, hydrologic condition and interim disposal field condition；
(2) by section cofferdam, whole dredging target section enclosing, being spaced with unit cofferdam, arrange diversion channel in centrage both sides, river course or one side between the unit engineering that will divide, diversion channel runs through whole dredging target section；So make river utilize the guide effect of cofferdam and diversion channel to flow into downstream smoothly, keep the normal flood passage function in river to the full extent；
(3) at least one river bottom mud reservoir of each element project internal construction and at least one accident bed mud reservoir, river bottom mud reservoir is installed mud lift pump, installation accident mud lift pump in accident bed mud reservoir；River bottom mud reservoir is for being collected the bed mud mud in Dredging Process, with satisfied lifting needs；Accident bed mud reservoir is for avoiding construction period to meet with extreme weather, causes polluted river water to pollute and arrange with letting out section uncontaminated to downstream under current；
(4) start unit engineering dredging, uses high pressure to wash away water pump or geotechnique's machinery, requires bed mud is carried out engineering dredging operation according to dredging scope and dredging depth；
When possessing sluicing operating condition, use high pressure to wash away the bed mud after water pump will wash away and pour river bottom mud reservoir；By the screen cloth of river bottom mud reservoir water inlet end, screening out partial particulate, other bed mud enters river bottom mud reservoir, is promoted on the bank；When not possessing sluicing operating condition, use geotechnique's machinery to carry out dredging operation, the bed mud excavated or the mix and blend that adds water possess lifting condition laggard enter river bottom mud reservoir, or be directly transported on the bank；Affected by extreme weather cause a certain element project by rain drop erosion serious time, the polluted bed mud of excess is delivered to accident bed mud reservoir is kept in, accident condition is delivered on the bank after terminating the most in the lump；
(5) whole dredging work terminates and after acceptance(check), removes unit cofferdam, section cofferdam, diversion channel, river bottom mud reservoir and accident bed mud reservoir；
(6) before the bed mud after dredging processes disposal on the bank, first pass through test in laboratory analysis and field pilot test, determine after the dredging of target section the content situation of heavy metal in the particle diameter distribution situation of bed mud and different-grain diameter bed mud；Then process respectively by situations below:
Bed mud for being dug out by geotechnique's machinery in step (4):
1. when the particle diameter wherein contained is more than the mass fraction of the cobble of 4.75mm more than or equal to 10%, use river drip washing, the cobble washed out or rubble are detected analysis heavy metal content, if content of beary metal exceeds standard, then add chemical leaching liquid, bed mud is carried out chemical leaching, until the heavy metal in the cobble washed out or rubble meets building materials and uses standard, transports outward recycling；
2. when the particle diameter wherein contained is more than the mass fraction of the mass fraction of the cobble of 4.75mm cobble more than 4.75mm less than the coarse sand that particle diameter in 10%, and bed mud is 1.18mm～4.75mm and particle diameter less than 10%, then bed mud is made directly to carry out modifier treatment；
3. it is more than the mass fraction of the cobble of 4.75mm less than 10% when the particle diameter wherein contained, and in bed mud particle diameter be the mass fraction of the coarse sand of 1.18mm～4.75mm and the particle diameter cobble more than 4.75mm more than or equal to 10% time, then bed mud is used river drip washing, the cobble washed out and coarse sand are detected analysis heavy metal content, if content of beary metal exceeds standard, then bed mud is carried out chemical leaching, until the heavy metal in the cobble washed out and coarse sand meets building materials and uses standard, transport outward recycling；Bed mud after washed-out sand processes carries out modifier treatment；
(7) for the bed mud after scrubbed process in step (6):
1., when coarse sand mass fraction therein is less than 10%, modifier treatment is directly carried out；
2. when coarse sand mass fraction therein is more than or equal to 10%, bed mud is used river drip washing, to the coarse sand detection analysis heavy metal content washed out, if content of beary metal exceeds standard, then bed mud is carried out chemical leaching, until the heavy metal in the coarse sand washed out meets building materials and uses standard, transport outward recycling；Bed mud after drip washing carries out modifier treatment；
(8) for step (4) washes away the bed mud of acquirement and the bed mud that accident bed mud reservoir is temporary through high-pressure hydraulic, after being pumped on the bank, carry out drip washing process according to the process of step (6) and step (7), or directly carry out modifier treatment；
(9) mud after modifier treatment carries out muddy water precipitate and separate；
(10) for the supernatant after step (9) precipitate and separate, process respectively by situations below:
1. do not contain leacheate and meet discharge standard, directly discharging；
2. do not contain leacheate but do not meet discharge standard, process rear discharge up to standard；
3. contain chemical leaching liquid, do not possess leacheate recovery value, but meet discharge standard, directly discharge；
4. contain chemical leaching liquid, do not possess leacheate recovery value, but do not meet discharge standard, process rear discharge up to standard；
5. contain chemical leaching liquid, possess leacheate recovery value, process；Leacheate after process meets what recycling required, recycles；Leacheate after process can not meet use requirement, but meets what discharge water body required, water body near direct draining；Leacheate after process can not meet use requirement, can not meet again discharge water body requirement, qualified discharge after processing；
(11) mud after step (9) precipitate and separate is processed respectively by situations below:
1., when the mass fraction of the medium-fine sand that the particle diameter wherein contained is 0.075mm～1.18mm and the cobble not screened out and coarse sand is more than or equal to 10%, medium-fine sand and cobble and coarse sand are screened out；The cobble sifted out, coarse sand and medium-fine sand are detected analysis heavy metal content, if content of beary metal meets building materials uses standard, directly transport outward recycling, if content of beary metal exceeds standard, then by stabilizer, bed mud being carried out stabilized treatment, the bed mud after stablizing meets outward transport rationally disposal after relevant disposal standard；
2., when the mass fraction of the medium-fine sand wherein contained and the cobble not screened out and coarse sand is less than 10% less than the mass fraction of the thick mud that particle diameter in 10%, and bed mud is 0.020mm～0.075mm and medium-fine sand, cobble and coarse sand, solid-liquid separation is carried out；
3. when the mass fraction of the medium-fine sand wherein contained and the cobble not screened out and coarse sand is less than 10%, but when in mud, the mass fraction of thick mud, medium-fine sand, cobble and coarse sand is more than 10%, thick mud therein is screened out, to the thick mud detection analysis heavy metal content sifted out, if outward transport is rationally disposed after meeting relevant disposal standard, mud under Shai carries out solid-liquid separation, if heavy metals exceeding standard, then by stabilizer, bed mud being carried out stabilized treatment, after the bed mud after stablizing meets relevant disposal standard, outward transport is disposed；
(12) for the mud after solid-liquid separation, nurse one's health by adding flocculant；For the supernatant after solid-liquid separation, then process respectively by situations below:
1. without stabilizer in supernatant, and meet discharge standard, directly discharge；
2. without stabilizer in supernatant, but do not meet discharge standard, process rear discharge up to standard；
3. containing stabilizer in supernatant, do not possess stabilizer recovery value, but meet discharge standard, directly discharge；
4. containing stabilizer in supernatant, do not possess stabilizer recovery value, but do not meet discharge standard, process rear discharge up to standard；
5. containing stabilizer in supernatant, possess stabilizer and reclaim what use required, recycle；
(13) mud after conditioning uses mechanical dewatering equipment to be dehydrated；
Supernatant for after dehydration:
1. without stabilizer in supernatant, and meet discharge standard, directly discharge；
2. without stabilizer in supernatant, but do not meet discharge standard, process rear discharge up to standard；
3. containing stabilizer in supernatant, do not possess stabilizer recovery value, but meet discharge standard, directly discharge；
4. containing stabilizer in supernatant, do not possess stabilizer recovery value, but do not meet discharge standard, process rear discharge up to standard；
5. containing stabilizer in supernatant, possess stabilizer and reclaim what use required, recycle；
Mud cake for after dehydration:
1. meeting the standard-required in final disposal place such as the bed mud after dehydration, outer running is rationally disposed；
2. can not directly meet the standard-required in final disposal place such as the bed mud after dehydration, then make moisture content meet the stirring of follow-up stable curing and require laggard line stabilization cured；
(14) bed mud after dehydration and stabiliser solution carry out being sufficiently mixed stirring reaction, carry out stable curing process, and the bed mud after stable curing process should meet the standard-required in final disposal place.
2. the dredging of ephemeral stream heavy metal polluted bed mud and a dystopy governing system, including bed mud in river dredging system and sludge handling system two parts on the bank, is characterized in that:
Bed mud in river dredging system includes river bottom mud reservoir, accident bed mud reservoir, mud lift pump and accident mud lift pump, river bottom mud reservoir includes mud inlet end successively, crosses stream gallery and mud outlet end, mud inlet end is provided with at least one screen cloth, mud outlet end is provided with collection mud pit, collection is provided with bed mud mud lift pump in mud pit, in accident bed mud reservoir, installation accident mud lift pump, bed mud mud lift pump and accident mud lift pump are all connected with the roller-type stone washing machine in sludge handling system on the bank or the quenched pond of mud mixing by pipeline；
Sludge handling system includes that roller-type stone washing machine, collection mud sump, screw sand washer, the molten medicine device of leacheate, ring waste reaction tank, leacheate precipitation recovery pond, mud mix quenched pond, mud-settling pit, vibrosieve, hydrocyclone, mud concentration basin, mud conditioner, mechanical dewatering equipment, stable curing mixing plant, tail water chemical reaction pond, tail water chemical precipitation pond, the molten medicine device of flocculant and the molten medicine device of stabilizer on the bank；All molten with the leacheate medicine device of roller-type stone washing machine and screw sand washer is connected；Roller-type stone washing machine is connected with collection mud sump；Collection mud sump is connected with screw sand washer by the elevator pump set within it；Screw sand washer, mud mix quenched pond, mud-settling pit, ring waste reaction tank and leacheate precipitation recovery pond and are sequentially connected with；Mud-settling pit is connected with ring waste reaction tank；Mud-settling pit is connected with vibrosieve by the elevator pump set within it, and vibrosieve is connected with hydrocyclone by elevator pump, and hydrocyclone, mud concentration basin, mud conditioner, mechanical dewatering equipment and stable curing mixing plant are sequentially connected with；Mud concentration basin, tail water chemical reaction pond and tail water chemical precipitation pond are sequentially connected with；The molten medicine device of stabilizer is connected with vibrosieve；The molten medicine device of flocculant is connected with sludge conditioning pond.
Ephemeral stream heavy metal polluted bed mud the most according to claim 2 dredging and dystopy governing system, is characterized in that, the degree of depth crossing stream gallery of described river bottom mud reservoir is less than 0.5m, and the gradient is not less than 0.1%.
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| CN105155463B (en) * | 2015-08-18 | 2017-03-08 | 湖南艾布鲁环保科技有限公司 | A kind of river course or the ecological dredging processing method in lake |
| CN106116076B (en) * | 2016-08-16 | 2018-06-15 | 中电建水环境治理技术有限公司 | River and lake pool gushes polluted bed mud industrial treatment automatic control system |
| CN108298783A (en) * | 2018-03-05 | 2018-07-20 | 中化工程集团环保有限公司 | Heavy metal polluted bed mud obstructs restorative procedure in situ |
| CN108824350A (en) * | 2018-06-06 | 2018-11-16 | 上海景铭建设发展有限公司 | A kind of comprehensive processing method in river |
| CN110845103A (en) * | 2019-12-17 | 2020-02-28 | 河南省地质环境规划设计院有限公司 | Heavy metal polluted river bottom mud treatment method |
| CN110965606A (en) * | 2019-12-30 | 2020-04-07 | 江苏东恒环境控股有限公司 | River channel dredging sediment recycling system and method |
| CN111362385A (en) * | 2020-03-11 | 2020-07-03 | 江苏南大华兴环保科技股份公司 | Method for treating river water polluted by antimony |
| CN112010515B (en) * | 2020-06-01 | 2023-01-24 | 中化环境科技工程有限公司 | Rapid method suitable for industrialized remediation of heavy metal-containing leachate polluted river sediment |
| CN113866383A (en) * | 2021-06-24 | 2021-12-31 | 中国市政工程华北设计研究总院有限公司 | Black and odorous water body sediment grading treatment method taking ratio of VSS to SS as evaluation standard |
| CN113683274A (en) * | 2021-08-03 | 2021-11-23 | 山东省环境保护科学研究设计院有限公司 | System and method for ex-situ treatment of sludge in urban pipe gallery |
| CN113772907B (en) * | 2021-09-27 | 2023-11-10 | 山东建筑大学 | In-situ aquatic plant restoration process for river sediment heavy metal pollution |
| CN114411618B (en) * | 2022-02-11 | 2023-11-24 | 北京市水科学技术研究院 | Damaged river channel matrix repairing method |
| CN115182293A (en) * | 2022-06-01 | 2022-10-14 | 中交（天津）生态环保设计研究院有限公司 | River channel endogenous management method |
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| KR101167498B1 (en) * | 2010-02-23 | 2012-07-19 | 한국하이테크 주식회사 | treatment method for mud on the shores |
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| CN103496833B (en) * | 2013-10-22 | 2014-11-19 | 山东省环境保护科学研究设计院 | Bottom sediment heavy metal pollution modularized ex situ treatment method |
| CN204661517U (en) * | 2015-05-12 | 2015-09-23 | 山东省环科院环境工程有限公司 | The dredging of seasonal stream heavy metal polluted bed mud and dystopy governing system |
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