CN103334469B - The treatment system removed for inner city pollution of river bed mud and treatment process - Google Patents
The treatment system removed for inner city pollution of river bed mud and treatment process Download PDFInfo
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Abstract
The invention discloses a kind for the treatment of system of removing for inner city pollution of river bed mud and treatment process, this system comprises by the multi-functional dredger of pipeline communication, mud accumulating ship and sludge dewatering mummification ship; This multi-functional dredger comprises: body, wheeled supporting leg, is arranged on thick garbage-cleaning instrument or the reamer tool of body one end, and, for driving first hydraulic system of this thick garbage-cleaning instrument or reamer tool; This mud accumulating ship comprises: accumulating hull, guide pile, and spoil hopper, is also provided with some agitators in this spoil hopper, and this spoil hopper is connected on this sludge dewatering mummification ship by pipeline; This sludge dewatering mummification ship comprises: dehydration and drying hull, guide pile, the second hydraulic system, stirs cabin, medicine machine; And, drying equipment.The portable treating stations that treatment process provided by the invention adopts, all devices is arranged in shipboard operation, does not take land resources, and processing method is simple, and the cycle is short, and sludge treatment is thorough, workable.
Description
Technical field
The present invention relates to a kind of riverway sludge treatment process, particularly, relate to a kind for the treatment of system for the removing of inner city pollution of river bed mud and treatment process.
Background technology
Shanghai City He Hu is numerous, and gathering in the network of rivers, is typical tidal river network area, and water resource is enriched, but hydraulic gradient is mild, and current come and go, and self-purification capacity is poor, and river channel sedimentation is comparatively serious, and water quality is poor.In central area, surrounding resident density is comparatively large, and in region, river course belongs to tidal waterway mostly, river moves back and forth with tide, part river bottom mud alluvial phenomenon is more outstanding, containing hazardous substancess such as tens heavy metal species, organic pollutions in bed mud, brings considerable influence to water quality and Ecology.During summer high temperature, polluted bed mud turns over and bubbles through the water column, cause water quality deterioration and water body visual perception effect poor.
Channel cleanout engineering removes one of the effective way of polluted bed mud, river training water quality.The method that for many years Shanghai Central Urban Area adopts hydraulic suction dredge grab bucket to excavate bed mud is substantially dredged, but this construction method exists larger drawback.First, in grab bucket lifting process, the with serious pollution mud scum of part and bed mud can drain back in river course again along the gap of grab bucket, and pollution of river bed mud is still existed, and the hazardous substancess such as heavy metal still remain, and soil is then scooped away by grab bucket relatively preferably.Secondly, this construction method is removed river bed polluted bed mud after need draining river cutout, but do not possess such execution conditions in inner city, mainly contain several respects reason: one is the water resource scheduling of the participation whole city, river course, inner city, and carry the critical function of flood control and drainage, cutout construction cannot be realized; Two be part river course bank for ecological revetment, neighboring buildings distance river course is very near, once drain river may bring impact to structural stability; Though three are part river courses is block stone structure flood-control wall, there is the situations such as quicksand in river course periphery, once destroy the pressure balance of river and underground water, Piping phenomenon may occur, the serious consequence such as cause that flood-control wall is caved in.
At present, domestic pollution of river bed mud is removed the method generally adopted and is mainly contained " grab bucket dredge+natural mummification " and " strand suction dredge+cofferdam nature mummification " two kinds of modes, engineering construction is more extensive, needs the construction plant of larger area, and easily causes secondary pollution to soil; The method and the traditional extensive style of external less employing is dredged, adopting more is the method for cutter suction dredger+mechanical dehydration.It is slurry form that river course strand inhales Dredging mud out, and moisture content is at about 95%-97%, if directly transport not only, freight volume is huge, increase cost of transportation, and slime water is easily revealed in transportation, causes adverse effect to transportation route environment.After sludge dewatering, sludge volume significantly reduces, and freight volume only has the 1/8-1/10 of former pipeline run, can save a large amount of freights, reduces the stacking area of mud.
In conjunction with Shanghai City river bottom mud present situation, consider that pair twist suction suction dredge scheme makes primary study, comprise strand suction mode, run control, sludge treatment, mode of movement etc., take into account bed mud elimination efficiency and operation cost of investment, corresponding plant equipment is studied on the basis determining typical process flow, make every effort to make device miniaturization, modularization and usefulness, possess the possibility applied.
Summary of the invention
The object of this invention is to provide a kind for the treatment of stations of the movable type for the removing of inner city pollution of river bed mud, all equipment is arranged in shipboard operation, do not take land resources, and in order to meet the requirement of inner city channel cleanout, the above Altitude control of all devices waterline is below 2 meters, Noise measarement is being no more than 75 decibels outward from equipment 7 meters, and the uncovered cabin of all devices, all with tilt, prevents distributing of peculiar smell.
For achieving the above object, the invention provides a kind for the treatment of system removed for inner city pollution of river bed mud, this system comprises by the multi-functional dredger of pipeline communication, mud accumulating ship and sludge dewatering mummification ship;
Described multi-functional dredger comprises:
Body,
Being provided with four in the corner of body can only up and down and the wheeled supporting leg swung;
Be arranged on thick garbage-cleaning instrument or the reamer tool (installing thick garbage-cleaning instrument or reamer tool as required) of body one end;
For driving the first hydraulic system of described thick garbage-cleaning instrument or reamer tool;
Described mud accumulating ship comprises:
Accumulating hull;
Being arranged on four on accumulating hull corner can only the automatic lifting guide pile of toppling over; And
Be arranged on the spoil hopper of midship, this spoil hopper top is provided with revolution fine fack; This revolution fine fack is connected on barge by belt conveyer; Some agitators are also provided with in this spoil hopper; This spoil hopper is connected on described sludge dewatering mummification ship by pipeline, the mud in spoil hopper by mud pump set through tubing pump on described sludge dewatering mummification ship;
Described sludge dewatering mummification ship comprises:
Dehydration and drying hull;
Being arranged on four on dehydration and drying hull corner can only the automatic lifting guide pile of toppling over;
Be arranged on the second hydraulic system of dehydration and drying midship;
The stirring cabin be communicated with spoil hopper by pipeline, is provided with some agitators in this stirring cabin;
The medicine machine be connected with described stirring cabin inlet duct, joins in stirring cabin by medicament by pipeline by this medicine machine;
The drying equipment be connected with described stirring cabin pipeline.
The above-mentioned treatment system removed for inner city pollution of river bed mud, wherein, described reamer tool is environmental protection screw reamer.
The above-mentioned treatment system removed for inner city pollution of river bed mud, wherein, is provided with protective cover around described reamer.
The above-mentioned treatment system removed for inner city pollution of river bed mud, wherein, described thick garbage-cleaning instrument is back hoe, and this back hoe is with leaking hole.
The above-mentioned treatment system removed for inner city pollution of river bed mud, wherein, described thick garbage-cleaning instrument is closed hydraulic pressure grab bucket, and the grab bucket of this closed hydraulic pressure is clamshell bucket, with two hydraulic jacks, can realize initiatively capturing.
The above-mentioned treatment system removed for inner city pollution of river bed mud, wherein, described thick garbage-cleaning instrument is pump bucket, this pump bucket comprises in one the rake tool establishing spiral crushing device, at the rear portion of this destroyer, grid is housed, on the top of pump bucket, slush pump is housed, mud rake is inhaled in the bucket capacity of pump bucket when harrowing and getting by pump bucket.
Present invention also offers a kind for the treatment of process adopting the above-mentioned treatment system for the removing of inner city pollution of river bed mud to carry out bed mud removing, this technique comprises silt displacement, bed mud transport and sludge handling step, wherein, described silt displacement comprises following steps:
Step 1, adopts multi-functional dredger to carry out thick garbage-cleaning, utilizes the first hydraulic system to drive described thick garbage-cleaning instrument by the thick and stiff rubbish in bed mud and the process of soft fabric pre-cleaning, removes thick rubbish;
Step 2, mud strand inhales process, drives reamer, stir bed-silt by the first hydraulic system of multi-functional dredger, by conveyance conduit, mud is delivered directly to the spoil hopper of mud accumulating ship with diving sludge pump;
Step 3, adopts mud accumulating ship to carry out homogeneous process: filter through revolution fine fack, be transported on barge by the bulky grain foreign material of screening through belt conveyer, remaining mud stirs through agitator in spoil hopper, carries out homogeneous process;
Step 4, adopt sludge dewatering mummification ship flocculation sediment: by the mud after the process of step 3 homogeneous, adopt mud pump set through tubing pump to the stirring cabin of sludge dewatering mummification ship, in stirring cabin, flocculant is added by controlling medicine machine, mud rapid aggregation is made to form graininess, to guarantee sludge dewatering efficiency;
Step 5, dehydration: make moisture content after flocculation sediment about 97% mud, the drying equipment entering sludge dewatering mummification ship dewaters; Dry mud after dehydration is transported away, supernatant backflow recycling.
Above-mentioned treatment process, wherein, before described step 1, first arranges fixed point desilting groove in river course.
Above-mentioned treatment process, wherein, before described step 2, first by the mud after thick for step 1 garbage-cleaning process, natural sedimentation 3-8 days.
The sludge treatment system that the present invention adopts and treatment process have following technical advantage:
1, the method for strand suction is adopted to draw bed mud, the method has better cleaning effect for the mud scum and bed mud segmenting son, improve the drawback of conventional method, the hazardous substancess such as heavy metal residual in floating bed mud can be removed comparatively thoroughly, the water quality in river course is fundamentally improved.
2, whole channel cleanout operation is carried out all on the water, solves the restricted predicament in conventional method place.The mud that mud strand suction ship is drawn directly is sent on sludge dewatering ship and dewaters, and through homogeneous and the flocculation Direct Dehydration of mud, spin cycle shortens greatly.Mud water content after dehydration is low, and volume more easily transports after reducing, and reduces the cost of freight volume and transport.
3, the present invention turns to routine servicing by traditional irregular Dredging Construction, the fixed point desilting groove of some matrixs is set in bottom of river channel, because fine grain floating mud has certain mobility, along with the reciprocal flowing of current, mud scum flows to matrix desilting groove and in this region enrichment, only the mud in fixed point desilting groove need be absorbed, greatly reduce the engineering quantity of traditional desilting.This fixed point desilting mode can protect the habitat, river course outside desilting groove, is beneficial to the recovery of water body self-purification ability, contributes to the ecological construction after the overall desilting in river course.
Accompanying drawing explanation
Fig. 1 is the lateral view of the multi-functional dredger (thick garbage-cleaning instrument is back hoe 131) of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 2 is the top view of the multi-functional dredger (thick garbage-cleaning instrument is back hoe 131) of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 3 is the lateral view of the multi-functional dredger (thick garbage-cleaning instrument is closed hydraulic pressure grab bucket 132) of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 4 is the lateral view of the multi-functional dredger (thick garbage-cleaning instrument is pump bucket 133) of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 5 is the lateral view of the mud accumulating ship of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 6 is the top view of the mud accumulating ship of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 7 is the lateral view of the sludge dewatering mummification ship of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 8 is the top view of the sludge dewatering mummification ship of a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention.
Fig. 9 is the process chart that a kind for the treatment of system for the removing of inner city pollution of river bed mud of the present invention carries out sludge treatment.
Detailed description of the invention
Below in conjunction with drawings and Examples, concrete technical scheme of the present invention is described.
The invention provides a kind for the treatment of system removed for inner city pollution of river bed mud, this system comprises by the multi-functional dredger of pipeline communication, mud accumulating ship and sludge dewatering mummification ship.
As Figure 1-4, described multi-functional dredger comprises:
Body 110,
Being provided with four in the corner of body 110 can only up and down and the wheeled supporting leg 120 swung;
Be arranged on thick garbage-cleaning instrument or the reamer tool of body 110 one end; Further, described thick garbage-cleaning instrument comprises: back hoe 131(is as shown in Figure 1 and Figure 2), closed hydraulic pressure grab bucket 132(as shown in Figure 3) and pump bucket 133(as shown in Figure 4) in any one; Described reamer tool is environmental protection screw reamer, more preferably, is provided with protective cover around described reamer; And
For driving the first hydraulic system 140 of described thick garbage-cleaning instrument or reamer tool;
As shown in Figure 5, Figure 6, described mud accumulating ship comprises:
Accumulating hull 210;
Being arranged on four on accumulating hull 210 4 jiaos can only the automatic lifting guide pile 220 of toppling over; And
Be arranged on the spoil hopper 230 of midship, this spoil hopper 230 top is provided with revolution fine fack 231; This revolution fine fack 231 is connected on barge by belt conveyer 232; Some agitators 233 are also provided with in this spoil hopper 210; This spoil hopper 210 is connected on described sludge dewatering mummification ship by pipeline, is delivered on sludge dewatering mummification ship by the mud after the process of agitator homogeneous by mud pump set 234 through tubing pump.
As shown in Figure 7, Figure 8, described sludge dewatering mummification ship comprises:
Dehydration and drying hull 310;
Being arranged on four on dehydration and drying hull 310 4 jiaos can only the automatic lifting guide pile 320 of toppling over;
Be arranged on the second hydraulic system 330 in the middle part of dehydration and drying hull 310;
By the stirring cabin 340 that pipeline is communicated with spoil hopper 210, in this stirring cabin 340, be provided with some agitator (not shown);
The medicine machine 350 be connected by pipeline with described stirring cabin 340 entrance, joins in stirring cabin 340 by medicament by pipeline by this medicine machine 350;
The drying equipment 350 be connected with described stirring cabin 340 pipeline.
As shown in Figure 9, for the above-mentioned treatment system for the removing of inner city pollution of river bed mud provided by the invention carries out the technique of bed mud removing, this technique comprises silt displacement, bed mud transport and sludge handling step, and wherein, described silt displacement comprises following steps:
Step 1, adopts multi-functional dredger to carry out thick garbage-cleaning, utilizes the first hydraulic system 140 to drive described thick garbage-cleaning instrument by the thick and stiff rubbish in bed mud and the process of soft fabric pre-cleaning, removes thick rubbish; Remove thick garbage-cleaning instrument, install reamer tool;
Step 2, mud strand inhales process, drives reamer, stir bed-silt by the first hydraulic system 140 of multi-functional dredger, by conveyance conduit, mud is delivered directly to the spoil hopper 230 of mud accumulating ship with diving sludge pump;
Step 3, adopts mud accumulating ship to carry out homogeneous process: filter through revolution fine fack 231, be transported on barge by the bulky grain foreign material of screening through belt conveyer 232, remaining mud stirs through agitator 233 in spoil hopper 230, carries out homogeneous process;
Step 4, adopt sludge dewatering mummification ship flocculation sediment: by the mud after the process of step 3 homogeneous, adopt mud pump set 234 through tubing pump to the stirring cabin 340 of sludge dewatering mummification ship, flocculant is added to stirring 340 li, cabin by controlling medicine machine 350, mud rapid aggregation is made to form graininess, to guarantee sludge dewatering efficiency;
Step 5, dehydration: make moisture content after flocculation sediment about 97% mud, the drying equipment 360 entering sludge dewatering mummification ship dewaters; Dry mud after dehydration is transported away, supernatant backflow recycling.
Embodiment
Whole dredging operation of the present invention carries out on the water, adopts Amphibious type multi-functional dredger to carry out dredging operation, and this dredger is furnished with multiple removable instrument equipment, comprises back hoe 131, closed hydraulic pressure grab bucket 132 and pump bucket 133 or reamer tool.Comparatively dark for alluvial, the more serious river course that hardens can adopt back hoe 131 or closed hydraulic pressure grab bucket 132 to carry out digging operation, is directly unloaded by excavation mud and transports outward on barge; More shallow for alluvial, the more river course of mud scum can adopt pump bucket 133 to carry out dredging operation, mud is delivered to follow-up mud accumulating conveyor by tubing pump, carry out garbage sorting and homogeneous process, mud after process is delivered to follow-up dehydration and drying ship by tubing pump again and is carried out dehydration and drying, reaches the state of vehicle-mounted transport.All equipment is arranged in shipboard operation, do not take land resources, and in order to meet the requirement of inner city channel cleanout, the above Altitude control of all devices waterline is below 2 meters, Noise measarement is being no more than 75 decibels outward from equipment 7 meters, the uncovered cabin of all devices, all with tilt, prevents distributing of peculiar smell.
As Figure 1-4, multi-functional dredger equipment is based on ship shape body 110, four are equipped with only up and down and the wheeled supporting leg 120 swung in the corner of body, green turtle can be imitated on the coast creep, can get on or off the bus voluntarily, the river course that the gradient is comparatively delayed can voluntarily up and down bank to come in and go out waters, four the wheeled supporting legs of self can be relied in water to realize the location that works in water.At the stern of body, two screws (diagram does not mark) are also housed, the water sailing transfer of complete machine can be realized.
This machine is furnished with three kinds of instrument equipments, is respectively back hoe 131, closed hydraulic pressure grab bucket 132 and pump bucket 133.Scraper bowl 131 adopts similar land power shovel, with leaking hole; Closed hydraulic pressure grab bucket 132 is clamshell bucket, with two hydraulic jacks, can realize initiatively capturing; Pump bucket 133 is that similar back hoe is built with a spiral crushing device, at the rear portion of destroyer, grid is housed, on the top of pump bucket 133, slush pump is housed, when mud rake is inhaled in bucket capacity when rake is got by pump bucket, first spiral crushing device carries out broken pulping to bulk, firm mud foreign material, fall bulk materials by grid filtration, then directly siphoned away by slush pump and be pumped to subsequent job platform.
This multi-functional dredger important technological parameters:
Captain: 8.0m(hull);
Machine width: 2.6m(is not with buoyancy tank); 3.8m(is with buoyancy tank);
Machine is high: 2.7m;
Gap bridge headroom: >=2m;
Dig dark: 4.5m;
Operating depth :≤3m;
Backhoe bucket capacity: 0.4m
3;
Grab bucket bucket capacity: 0.3m
3;
Pump bucket dredge pump clear water flow: 100m
3/ h;
Arrange high: 3m;
Array pitch: >=200m, (arranging high 3m);
Mud pipe diameter: about 120mm;
Diesel engine power: 60kw.
Multi-functional dredger of the present invention, in whole dredging operation, mainly by changing different construction equipment (grab bucket of back hoe, closed hydraulic pressure and pump bucket, environmental protection screw reamer, soil-suction head, rake tool) etc., completes thick garbage-cleaning and mud strand suction operation.
Thick garbage-cleaning and can have the good pump bucket 133 drawing effect to clear up to mud scum with the special scraper bowl 131 that dredger configures, clam shell grab bucket 132, clears up thick garbage transporting to the neighbouring garbage disposal landfill yard obtained and processes.After thick garbage-cleaning completes, carry out strand through mud natural sedimentation one Zhou Houzai and inhale.
Mud strand is inhaled, and drives reamer (not shown), stir bed-silt by the first hydraulic system 140, and then by conveyance conduit, mud is delivered directly to sludge-tank with diving sludge pump, the distance of the longest conveying of mud is 500 meters.Because scene does not possess the condition arranging sludge-tank and treatment facility, sludge-tank and treatment facility are arranged on mud accumulating ship, build up portable treating stations.
Different construction equipments on multi-functional dredger are changed easy, rapid, and construction wobble area of dredging is comparatively large, can meet the requirement of multiple Dredging Construction mode.Screw reamer itself is little to mud disturbance, installs protective cover additional again around reamer, can realize environmental protection and dredge, and can carry out Channel slope to dredge construction by adjustment reamer angle.
Mud accumulating ship equipment provided by the invention, based on ship shape body accumulating hull 210, has a volume to be about 50m at the middle part of accumulating hull 210
3spoil hopper 230, the corner of accumulating hull 210 is equipped with can the automatic lifting guide pile 220 of toppling over, and for the location that works in water, at body stern, the water sailing of two screws (diagram is not marked) for complete machine is also housed.Equipment operationally, mud sucking pump sent here by aforementioned Amphibious type multi-functional desilting pump bucket 133 is after revolution fine fack 231 sorts, mud enters spoil hopper 230, revolution fine fack 231 pairs of mud carry out filtration screening, being rejected by large granular materials is delivered on belt conveyor 232, is directly unloaded on barge by belt conveyor 232.Mud through screening enters spoil hopper 230, two agitators 233 are also housed in spoil hopper 230, ceaselessly stir process is carried out to mud, to ensure the stability of subsequent treatment concentration of hydraulic mixture, be pumped to dehydration and drying ship through the mud of homogeneous process by mud pump set 234 and carry out follow-up process.
Mud accumulating ship important technological parameters:
Captain: 15.0m;
Machine width: 3.8m;
Machine is high: 1.6m;
Full-load draft: 1.4m;
Hopper capacity:>=50m
3;
Belt conveyer width: 800mm, belt conveyer can on machine way moving, can bilateral discharging, monolateral go out machine (ship) limit >=1300mm;
Revolution fine fack: rake teeth gap 2mm, material is stainless steel, and grid size is: 2m × 1m, and inflow-rate of water turbine is: 80-100m
3/ h, does not block, with sewage disposal apparatus;
Diesel generating set: 40kw(is furnished with noise-reducing device);
The above fixture height of waterline :≤2.0m.
Sludge dewatering mummification ship equipment is based on ship shape body dehydration and drying hull 310, what the transmission of employing second hydraulic system 330 was housed in the corner of dehydration and drying hull 310 can the automatic lifting guide pile 320 of toppling over, for the work location in water, at body stern, the water sailing of two screws (not showing) for complete machine is also housed.Drying equipment 360 is equipped with at the middle part of dehydration and drying hull 310, can carry out dosing flocculation and dehydration and drying to the mud that the pumping of mud accumulating conveyor comes.Mud without dehydration enters pipeline from mud import D, simultaneously medicine machine 350 add medicament enter to stir in this stirring cabin 340 of cabin 340(by pipeline be provided with some mixing plants), enter drying equipment 360 again by the mud stirring homogeneous and carry out drying and other treatment.
Sludge dewatering mummification ship important technological parameters:
Captain: 15.5m;
Machine width: 3.8m;
Machine is high: 1.2m;
Full-load draft: 0.9m;
Diesel generating set: 40kw(is furnished with noise-reducing device);
The above fixture height of waterline :≤2.0m.
Above-mentioned treatment system specifically implements point following steps:
Step 1, thick garbage-cleaning
Because public river course, inner city is in resident living region, the household garbage of the old accumulation in river bed is more, especially soft fabric, easy winding reamer and block dredge pump, so thick and stiff rubbish and soft fabric must be cleared up one time before desilting, guarantee without thick rubbish, admant block and soft fabric in mud bottom 0.3-0.5 meter, can ensure that reamer is not wound around like this and not block with dredge pump, the operating efficiency of inhaling mud can be improved again.Thick rubbish clearing up at the rake of the upper configure dedicated of ship (e.g., multi-functional dredger of the present invention) and clam shell grab bucket by particular design, can be cleared up thick garbage transporting to the neighbouring garbage disposal landfill yard obtained and processing.In more excellent embodiment, after thick garbage-cleaning completes, carry out strand through mud natural sedimentation one Zhou Houzai and inhale.
Step 2, mud strand is inhaled
Drive reamer by the first hydraulic system 140 of multi-functional dredger, stir bed-silt, then by conveyance conduit, mud is delivered directly to sludge-tank with diving sludge pump, the distance of the longest conveying of mud is 500 meters.Because scene does not possess the condition arranging sludge-tank and treatment facility, sludge-tank and treatment facility can be considered to be arranged on another ship, build up portable treating stations.Mud strand is inhaled equipment ship used and is adopted multi-functional dredger.In more excellent embodiment, adopt fixed point desilting groove technology regularly to clear up mud, the desilting groove of a 20m × 4m × 1m is set every 100 meters, results of regular determination silt depth, when mud reaches certain thickness, the mud in desilting groove is cleared up.
Step 3, homogeneous process
Mud accumulating ship is adopted to carry out homogeneous process: filter through revolution fine fack 231, be transported on barge by the bulky grain foreign material of screening through belt conveyer 232, remaining mud stirs through agitator 233 in spoil hopper 230, carries out homogeneous process.
Step 4, flocculation sediment
Owing to being uneven bottom riverbed and river bottom mud skewness, it is unstable that dredger strand inhales the mud concentration obtained, concentrate according to natural sedimentation, not only need to consume the much time, and be easily subject to the restriction of site condition, sedimentation effect is poor, therefore before sludge dewatering, adopt flocculation sediment technique, make mud rapid aggregation form larger particles shape by flocculation, guarantee sludge dewatering efficiency.Flocculant selects kind conventional in water treatment technology to reduce the pollution to river water body.
According to the properties of product of flocculant, chemical feeding quantity general control is at 50-80g/m
3, adjust according to water quality and sludge concentration.Medicament preparation and adding equipment determine according to treating capacity, and liquid coagulant is stored in medicinal cupping, directly adds by adding pump.
Step 5, sludge dewatering
By moisture content after flocculation sediment at the mud of about 97%, enter sludge dewatering mummification ship and dewater.Due to the restriction of inner city site condition, dehydration facility can not be arranged in bank, therefore medicine machine 350, flocculation sediment equipment (stirring cabin 340) and dewaterer (drying equipment 360) is considered to be arranged on hull, can continuously uninterrupted operation synchronous with dredger, reduce the transport of wet mud.Whole operation is all carried out belowdecks, can will drop to minimum on the impact of surrounding enviroment.By the constraint of hull area and carrying capacity, dehydration equipment is selected and is taken up an area the kind little, lightweight, efficiency is high and model.This programme adopts filter belt mud dewatering equipment to carry out mud-water separation process.Dehydrated sludge moisture content, about 80%, is transported to cargo ship or car by sludge pump or conveyer, is directly transported to landfill place.
For avoiding causing river water quality secondary pollution, the percolate produced after sludge dewatering and flushing liquor are back to the front end of sludge dewatering equipment by the pipe special of device for dehydrating sladge waste, flushing water as dewaterer recycles, and directly fetches water during the insufficient section of flushing water from river course.
Bed mud after processed still has higher moisture content, and as adopted terrestrial vehicle transport, not only cost is high, and easily causes environment pollution, and this technique adopts barging mode waterborne, considers to adopt groove tank car enclosed conveying under case of emergency.During water transportation, in river channel, adopt 30 tons of ships to transport, go to large Ship Transportation and process to specifying landfill yard.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1., for the treatment system that inner city pollution of river bed mud is removed, this system comprises by the multi-functional dredger of pipeline communication, mud accumulating ship and sludge dewatering mummification ship;
Described multi-functional dredger comprises:
Body (110),
Being provided with four in the corner of body (110) can only up and down and the wheeled supporting leg (120) swung;
Be arranged on two screws of body (110) stern;
Be arranged on thick garbage-cleaning instrument or the reamer tool of body (110) one end;
For driving first hydraulic system (140) of described reamer tool or thick garbage-cleaning instrument;
Described mud accumulating ship comprises:
Accumulating hull (210);
Being arranged on four on accumulating hull (210) corner can only the automatic lifting guide pile (220) of toppling over; And
Be arranged on the spoil hopper (230) of midship, this spoil hopper (230) top is provided with revolution fine fack (231); This revolution fine fack (231) is connected on barge by belt conveyer (232); Some agitators (233) are also provided with in this spoil hopper (230); This spoil hopper (230) is connected on described sludge dewatering mummification ship by pipeline, and the mud in spoil hopper (230) passes through mud pump set (234) on tubing pump to described sludge dewatering mummification ship;
Described sludge dewatering mummification ship comprises:
Dehydration and drying hull (310);
Being arranged on four on dehydration and drying hull (310) corner can only the automatic lifting guide pile (320) of toppling over;
Be arranged on second hydraulic system (330) at dehydration and drying hull (310) middle part;
By the stirring cabin (340) that pipeline is communicated with spoil hopper (230), in this stirring cabin (340), be provided with some agitators;
The medicine machine (350) be connected with described stirring cabin (340) inlet duct, joins in stirring cabin (340) by medicament by pipeline by this medicine machine (350);
The drying equipment (360) be connected with described stirring cabin (340) pipeline.
2., as claimed in claim 1 for the treatment system that inner city pollution of river bed mud is removed, it is characterized in that, described reamer tool is environmental protection screw reamer.
3., as claimed in claim 2 for the treatment system that inner city pollution of river bed mud is removed, it is characterized in that, around described reamer, be provided with protective cover.
4., as claimed in claim 1 for the treatment system that inner city pollution of river bed mud is removed, it is characterized in that, described thick garbage-cleaning instrument is back hoe (131), and this back hoe (131) is with leaking hole.
5. as claimed in claim 1 for the treatment system of inner city pollution of river bed mud removing, it is characterized in that, described thick garbage-cleaning instrument is closed hydraulic pressure grab bucket (132), this closed hydraulic pressure grab bucket (132) is clamshell bucket, with two hydraulic jacks, can realize initiatively capturing.
6. as claimed in claim 1 for the treatment system of inner city pollution of river bed mud removing, it is characterized in that, described thick garbage-cleaning instrument is pump bucket (133), this pump bucket (133) comprises in one the rake tool establishing spiral crushing device, at the rear portion of this destroyer, grid is housed, on the top of pump bucket (133), slush pump is housed, mud rake is inhaled in the bucket capacity of pump bucket (133) when rake is got by pump bucket (133).
7. the treatment process adopting the treatment system removed for inner city pollution of river bed mud as claimed in claim 1 to carry out bed mud removing, it is characterized in that, described multi-functional dredger also comprises diving sludge pump, this technique comprises silt displacement, bed mud transport and sludge handling step, wherein, described silt displacement comprises following steps:
Step 1, adopts multi-functional dredger to carry out thick garbage-cleaning: utilize described thick garbage-cleaning instrument by the thick and stiff rubbish in bed mud and the process of soft fabric pre-cleaning, remove thick rubbish;
Step 2, mud strand inhales process: described thick garbage-cleaning instrument is replaced with reamer tool, reamer tool is driven by first hydraulic system (140) of multi-functional dredger, stir bed-silt, by conveyance conduit, mud is delivered directly to the spoil hopper (230) of mud accumulating ship with diving sludge pump;
Step 3, mud accumulating ship is adopted to carry out homogeneous process: to filter through revolution fine fack (231), be transported on barge by the bulky grain foreign material of screening through belt conveyer (232), remaining mud stirs through agitator (233) in spoil hopper (230), carries out homogeneous process;
Step 4, adopt sludge dewatering mummification ship flocculation sediment: by the mud after the process of step 3 homogeneous, adopt mud pump set (234) through tubing pump to the stirring cabin (340) of sludge dewatering mummification ship, flocculant is added to stirring cabin (340) is inner by controlling medicine machine (350), mud rapid aggregation is made to form graininess, to guarantee sludge dewatering efficiency;
Step 5, processed: make moisture content after flocculation sediment 97% mud, the drying equipment (360) entering sludge dewatering mummification ship dewaters; Dry mud after dehydration is transported away, supernatant backflow recycling;
Before described step 1, fixed point desilting groove is first set in river course.
8. treatment process as claimed in claim 7, is characterized in that, before described step 2, first by the mud after thick for step 1 garbage-cleaning process, and natural sedimentation 3-8 days.
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