CN106336108B - A kind of method and device thereof of dredging muddy water efficiently volume reduction in situ - Google Patents

A kind of method and device thereof of dredging muddy water efficiently volume reduction in situ Download PDF

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Publication number
CN106336108B
CN106336108B CN201611041342.3A CN201611041342A CN106336108B CN 106336108 B CN106336108 B CN 106336108B CN 201611041342 A CN201611041342 A CN 201611041342A CN 106336108 B CN106336108 B CN 106336108B
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hydrocyclone
dredging
pam
muddy water
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CN106336108A (en
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隆院男
李志宏
蒋昌波
聂小保
吴长山
何盼盼
徐超
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents

Abstract

The invention discloses a kind of method and device thereof of dredging muddy water efficiently volume reduction in situ, and dredge pump (I), two-stage series connection hydrocyclone systems (III), coagulant mixing dosing system (II) and centrifugal dehydrator (IV) are arranged on dredging vessel.Centrifugal dehydrator is connected directly with two-stage series connection hydrocyclone systems.Using dredge pump (I) the suction dredging muddy water on dredging vessel, it is sent into two-stage hydrocyclone systems and carries out concentration volume reduction treatment, the concentration underflow spoil disposal after volume reduction is discharged into centrifugal dehydrator dehydration, and overflow clear liquid is directly discharged into water body.Dewatered mud cake is lightered to disposal by land, and for a part of reuse of dehydration filtrate to coagulant mixing dosing system (II), remaining is directly discharged into water body.The present invention is that one kind is small in size, occupied area is small, solid-liquid separation efficiency is high and is discharged the method and device thereof that can be directly discharged to the dredging muddy water efficiently volume reduction in situ of water body.

Description

A kind of method and device thereof of dredging muddy water efficiently volume reduction in situ
Technical field
The present invention relates to a kind of methods for dredging muddy water volume reduction, more particularly to a kind of efficiently volume reduction in situ of dredging muddy water Method.The invention further relates to the devices for realizing the dredging muddy water efficiently method of volume reduction in situ.
Background technique
Currently, the dredging muddy water generated for water body dredging, mainly uses dystopy tupe, i.e., blows or refute over long distances Fortune dredges muddy water to land stockyard/Treatment stations.However, advancing by leaps and bounds with dredging technology, dredges dredger used at present Yield is all bigger, and such as Tianjin Navigation Bureau " day whale " number cutter suction dredger, the amount of dredging is up to 4500m3/h;Even for small The dredger of waters environmental dredging, yield is also bigger, such as with the adaptable famous U.S. of compact-sized, small water Mudcat company MC-2000 type environment-friendly dredger, the amount of dredging also reach 600m3/h.With this condition, dystopy handle needed for stockyard compared with Greatly, and corresponding processing equipment/structures scale is also larger, and processing cost is high, is unfavorable for implementing.Therefore, it is necessary to dredging It dredges muddy water and carries out volume reductionization processing in situ, to cut down the scale of subsequent processing disposing technique.
The volume reduction technology and method in situ of muddy water is dredged, key is efficient solid-liquid separation efficiency.Currently, being directed to sludge The solid-liquid separation technique method of water can be divided into 2 classes: one kind is traditional concentration technique based on gravity concentration and mechanical thickening;One Class is the integrated concentrator that thickening efficiency and concentration time are superior to traditional concentration technique, such as fluidized bed concentration, waterpower rotation Stream is granulated concentration, in Chinese patent (publication number CN2600432, yellow court of a feudal ruler woods etc.;Publication number CN102078708A, Zhang Jianfeng etc.) in There is disclosure.Concentration time needed for first kind technical method is longer, generally more than a few hours, cannot achieve the original at dredging scene Position processing.Second class technology is although concentration time is greatly reduced, generally also at 0.5 hour or more, equipment volume and institute Need occupied area all larger, there are certain difficulty for implementation on dredging vessel.
Chinese patent (publication number CN103288324A, Jiang Changbo etc.) discloses a kind of " dredging muddy water original position separation of solid and liquid Method and device ".The device is granulated concentration and belt filters pressing as core using hydraulic cyclone, realizes coagulation medicine by hydraulic cyclone The fast reaction of agent and dredging muddy water, and muddy water concentration and dehydration pre-process, mistake are synchronously completed in hydraulic cyclone prilling granulator Journey is compact and independent of one another, will not influence each other, to realize the continuous operation of device;Concentration obtained by hydraulic cyclone prilling granulator Body refuse directly carries out belt type filter-pressing dehydration plant, realizes instant high efficient solid and liquid separation of the dredging muddy water on dredging vessel.But the device The concentration of suspension of water outlet is higher, it is difficult to meet " integrated wastewater discharge standard " (GB8978- that current China's dredging industry executes 96) III Standard value 400mg/L.
Hydrocyclone is a kind of general separation equipment, with occupied area is small, processing capacity is big, separative efficiency is high and nothing The advantages that moving component, has been widely used in the solid-liquid separation unit operation in the fields such as mining and metallurgy, petrochemical industry, food and environment.Water Power cyclone has been confirmed to the efficient quick solid-liquid separation effect of dredging muddy water.Park K.H. etc. uses hydrocyclone Processing dredging muddy water, realizes volume reduction 90% or so, but hydrocyclone overflowing liquid concentration of suspension is also higher, needs through taking up an area After the biggish air-floating apparatus processing of area, the standard for being discharged into water body can be only achieved.
So far, it there is not yet being both able to achieve dredged mud water efficient concentration volume reduction, while being discharged and being able to satisfy " integrated wastewater again Discharge standard " (GB8978-96) grade III Standard dredging muddy water in-situ treatment technology and equipment relevant report.
Summary of the invention
First technical problem to be solved by this invention be to provide it is a kind of it is small in size, occupied area is small, is separated by solid-liquid separation effect Rate is high and is discharged the method that can be directly discharged to the dredging muddy water efficiently volume reduction in situ of water body.
Second technical problem to be solved by this invention, which is to provide, a kind of realizes the side for dredging muddy water efficiently volume reduction in situ The device of method.
In order to solve the above technical problem, the present invention provides the efficiently volume reduction in situ of dredging muddy water method, in dredger ship Two-stage series connection hydrocyclone systems are set on oceangoing ship, and centrifugal dehydrator is connected directly with two-stage series connection hydrocyclone systems, dredger ship Oceangoing ship suction dredging muddy water with from the coagulant of coagulant mixing dosing system mix after into two-stage hydrocyclone systems into Row concentration volume reduction treatment, the concentration spoil disposal after volume reduction are discharged into centrifugal dehydrator dehydration, and overflow clear liquid is directly discharged into water body.
Specifically, using the dredge pump suction dredging muddy water of dredging vessel, dredging muddy water mixes to add and is with coagulant is come from After the coagulant mixing of system, the level-one hydrocyclone into two-stage series connection hydrocyclone systems is separated by solid-liquid separation, and is obtained dense Contracting body refuse and level-one overflow clear liquid;Level-one overflow clear liquid enters with after the mixing of the coagulant of coagulant mixing dosing system The second level hydrocyclone of two-stage series connection hydrocyclone systems is separated by solid-liquid separation, and concentration body refuse and second level overflow clear liquid are obtained; Second level overflow clear liquid is directly discharged into water body, de- into centrifugation after concentration body refuse merges with the concentration body refuse of level-one hydrocyclone Water dispenser carries out centrifugal dehydration;Dehydrated sludge cake is lightered to disposal by land, and dehydration filtrate a part is directly discharged into water body, and a part is sent into Coagulant mixing dosing system configures coagulant.
Coagulant mixing dosing system includes anion PAM and cationic PAM, and anion PAM toss area is located at level-one water Before power cyclone, cationic PAM toss area is located at before second level hydrocyclone.
The anion PAM molecular weight is between 200~5,000,000, and the cationic PAM molecular weight is 1000~20,000,000 Between.
In order to solve above-mentioned second technical problem, the method provided by the invention for realizing the efficiently volume reduction in situ of dredging muddy water Device, including dredge pump, coagulant mixing dosing system, two-stage series connection hydrocyclone systems and centrifugal dehydrator, described two Grade series connection hydrocyclone systems are by concatenated level-one tubular static mixer, level-one hydrocyclone, second level tubular type static mixing Device and second level hydrocyclone composition, the outlet of the dredge pump are connect with the import of the level-one tubular static mixer, The bottom of the level-one hydrocyclone is connected with level-one underflow tube valve, and outlet is connected with level-one overflow tube valve;It is described The bottom of second level hydrocyclone be connected with second level underflow tube valve, outlet is connected with second level overflow tube valve;Described one The outlet of grade underflow tube valve and second level underflow tube valve is connect with centrifugal dehydrator;The second level overflow tube valve discharge Overflow clear liquid is directly discharged into water body;The coagulant mixing dosing system is by anion PAM with tubbing and the anion PAM with the anion PAM of tubbing connection add pump, cationic PAM with tubbing and with cationic PAM with tubbing connect it is positive from Sub- PAM adds pump group and adds before pump is connected to level-one tubular static mixer import at, anion PAM, and cationic PAM adds pump Before being connected to the import of second level tubular static mixer;One of the dehydrated outlet of the centrifugal dehydrator is directly discharged into water Body, another is matched with the anion PAM of the coagulant mixing dosing system with tubbing and the cationic PAM Tubbing connection.
The main body of the level-one hydrocyclone and second level hydrocyclone be followed successively by from up to down tool overflow pipe blind plate, Double inlet flanges, straight pipe vortex chamber, conical section vortex chamber and underflow pipe, each section use flanged joint.
The cone angle of the conical section vortex chamber of the level-one hydrocyclone is 10 °.
The cone angle of the conical section vortex chamber of the second level hydrocyclone is 5 °.
Double inlet flange disks use tapered cross-section linear type entry mode, and sectional dimension is according to treatment scale and dredges Dredge muddy water property selection different size.
The method and device thereof of the efficiently volume reduction in situ of dredging muddy water by adopting the above technical scheme, mechanism are briefly described as below:
By dredge pump suction dredging muddy water first in level-one tubular static mixer with anion PAM hybrid reaction, Gu Body grain diameter is increased.Dredging muddy water is entered by double inlet flanges of level-one hydrocyclone by tangential inlet straight later Pipeline section vortex chamber, liquid at high speed rotation twist moves downward in straight pipe vortex chamber, into conical section vortex chamber.Due to The screw of liquid, hydrocyclone near axis become low-pressure area, wall vicinity pressure highest.Meanwhile dredging muddy water Solid phase and liquid phase are all acted on by centrifugal force, and large-size particles will overcome drag effect mobile to hydrocyclone side wall, with liquid Body separates, and is finally discharged by underflow pipe, forms concentration body refuse, send to centrifugal dehydrator and be dehydrated;Water and fine particle are to low pressure Area is mobile, and movement of spinning upwards in rotation forms inward eddy, finally from the overflow port discharge on tool overflow pipe blind plate.One Grade hydrocyclone overflow clear liquid in second level tubular static mixer with cationic PAM hybrid reaction, in cationic PAM Solid grain size increases, and enters second level hydrocyclone later, carries out hydraulic cyclone separation of solid and liquid again, and overflow clear liquid is up to standard It is emitted into water body, concentration body refuse merges to send to centrifugal dehydrator with level-one hydrocyclone concentration body refuse to be dehydrated.Dehydration filtrate one Part reuse to coagulant mixing dosing system prepares coagulant, remaining qualified discharge to water body.
The present invention have the advantage that and the utility model has the advantages that
1, using dredging vessel dredge pump self power condition, high-velocity flow is formed in two-stage hydrocyclone systems, is realized The hydrocyclone separation technology of solid phase and liquid phase is not necessarily to additional separation power, and two-stage hydrocyclone systems and centrifugal dehydrator are straight Connect connected, entire volume reduction process is completed on dredging vessel, it is not necessary that all dredging muddy water are blowed or lightered, is had low Consume energy-efficient significant advantage.
2, dredging muddy water volume reduction process is mainly completed in hydrocyclone systems, and hydraulic cyclone good effect of separating solid from liquid subtracts Capacity rate is high, while separation process is completed rapidly, and system hydraulic detention time is short, and volume and occupied area are small, convenient in dredger ship Implement on oceangoing ship.
3, hydrocyclone systems use two-stage series connection hydrocyclone, and hydrocyclones at different levels are relatively independent, definite functions, And it is each to have corresponding coagulant dosage device by oneself.The concentration that wherein first order hydrocyclone is mainly used for dredging muddy water subtracts Hold, coagulant uses the relatively small anion PAM of molecular weight;Second level hydrocyclone is mainly used for cutting down in overflowing liquid Concentration of suspension, coagulant use the relatively large cationic PAM of molecular weight.The form of two-stage series connection ensures efficient volume reduction Meanwhile system standard water discharge is discharged.
It 4, can be not by changing the sectional dimension of the double inlet flange disk tapered cross-section linear type entrances of hydrocyclone Under same inlet flow rate, identical inlet flow rate is obtained, i.e., obtains identical solid-liquid separation effect under different workloads, System gets a promotion to the adaptability of changes in flow rate in Dredging Process.
5, it according to the variation of dredging muddy water physicochemical properties, by adjusting the dosage of anion PAM, can obtain steady Fixed concentration volume reduction effect can obtain stable water outlet concentration of suspension, system by adjusting the dosage of cationic PAM It is adaptable to the variation for dredging muddy water physicochemical properties in Dredging Process.
For carrying out sludge reduction onsite processing to the dredging muddy water generated in Dredging Process, subsequent processing disposing technique is cut down Scale, it is especially suitable more particularly to using the concentration of two-stage series connection hydrocyclone and centrifugal dehydration as the sludge reduction method of core Together in the minimizing of the dredging muddy water generated in the activity such as roadway maintenance, port construction and environmental dredging.
In conclusion the present invention is that one kind is small in size, occupied area is small, solid-liquid separation efficiency is high and water outlet can direct emission To the method and device thereof of the dredging muddy water efficiently volume reduction in situ of water body.
Detailed description of the invention
Fig. 1 is dredging muddy water of the invention efficiently volume reduction method flow diagram in situ.
Fig. 2 is hydrocyclone structural schematic diagram in the present invention.
Fig. 3 is double inlet flange disk schematic diagrames in the present invention.
Fig. 4 is the present invention using anion PAM raising level-one hydrocyclone thickening efficiency effect diagram.
Fig. 5 is that subject cationic PAM is added to the reduction effect diagram for being discharged concentration of suspension.
Specific embodiment
A specific embodiment of the invention is described in more detail below in conjunction with attached drawing.
Referring to figure 1, figure 2 and figure 3, the method for dredging muddy water provided by the invention efficiently volume reduction in situ, on dredging vessel Two-stage series connection hydrocyclone systems are set, and centrifugal dehydrator is connected directly with two-stage series connection hydrocyclone systems, and dredging vessel is taken out The dredging muddy water of suction is dense into the progress of two-stage hydrocyclone systems with after the mixing of the coagulant of coagulant mixing dosing system Contracting volume reduction treatment, the concentration spoil disposal after volume reduction are discharged into centrifugal dehydrator dehydration, and overflow clear liquid is directly discharged into water body.
Specifically, using the dredge pump I suction dredging muddy water of dredging vessel, dredging muddy water mixes to add and is with coagulant is come from After the coagulant mixing of system II, the level-one hydrocyclone into two-stage series connection hydrocyclone systems III is separated by solid-liquid separation, and is obtained To concentration body refuse and level-one overflow clear liquid;Level-one overflow clear liquid is mixed with the coagulant from coagulant mixing dosing system II Afterwards, it is separated by solid-liquid separation into the second level hydrocyclone of two-stage series connection hydrocyclone systems III, obtains concentration body refuse and second level Overflow clear liquid;Second level overflow clear liquid is directly discharged into water body, after concentration body refuse merges with the concentration body refuse of level-one hydrocyclone, into Enter centrifugal dehydrator IV and carries out centrifugal dehydration;Dehydrated sludge cake is lightered to disposal by land, and dehydration filtrate a part is directly discharged into water body, A part is sent into coagulant mixing dosing system II and configures coagulant.
Coagulant mixing dosing system II includes anion PAM and cationic PAM, and anion PAM toss area is located at level-one Before hydrocyclone, cationic PAM toss area is located at before second level hydrocyclone.
Anion PAM molecular weight between 200~5,000,000, the cationic PAM molecular weight 1000~20,000,000 it Between.
Referring to figure 1, figure 2 and figure 3, the device provided by the invention for realizing the dredging muddy water efficiently method of volume reduction in situ, packet Include dredge pump I, coagulant mixing dosing system II, two-stage series connection hydrocyclone systems III and centrifugal dehydrator IV, two-stage series connection water Power cyclone system III is by concatenated level-one tubular static mixer 3, level-one hydrocyclone 1,4 and of second level tubular static mixer Second level hydrocyclone 2 forms, and the outlet of dredge pump I is connect with the import of level-one tubular static mixer 3, and level-one tubular type static state is mixed The outlet of clutch 3 is connect with the import of level-one hydrocyclone 1, the level-one overflow tube valve 6 of the outlet of level-one hydrocyclone 1 It is connect with the import of second level tubular static mixer 4, outlet and the second level hydrocyclone 2 of second level tubular static mixer 4 Import connection;The bottom of level-one hydrocyclone 1 is connected with level-one underflow tube valve 5, and outlet is connected with level-one overflow tube valve 6, the split ratio of level-one hydrocyclone 1 is controlled by level-one underflow tube valve 5 and level-one overflow tube valve 6;Second level hydraulic cyclone The bottom of device 2 is connected with second level underflow tube valve 8, and outlet is connected with second level overflow tube valve 7, point of second level hydrocyclone 2 Stream ratio is controlled by second level overflow tube valve 7 and second level underflow tube valve 8;Level-one underflow tube valve 5 and second level underflow tube valve 8 Outlet is connect with centrifugal dehydrator IV;The concentration body refuse that level-one underflow tube valve 5 and second level underflow tube valve 8 are discharged is sent after merging It is dehydrated to centrifugal dehydrator IV;The overflow clear liquid that level-one overflow tube valve 6 is discharged after second level tubular static mixer 4 via entering Second level hydrocyclone 2, the overflow clear liquid that second level overflow tube valve 7 is discharged are directly discharged into water body;Coagulant mixing dosing system II adds pump 10, cationic PAM preparation with the anion PAM that tubbing 9 is connect with tubbing 9, with anion PAM by anion PAM Bucket 11 and cationic PAM connect with cationic PAM with tubbing 11 add 12 composition of pump, and anion PAM adds pump 10 and connects Before 3 import of level-one tubular static mixer, anion PAM toss area is located at before tubular static mixer 3, cationic PAM Add pump 12 be connected to the import of second level tubular static mixer 4 before, cationic row PAM toss area is located at tubular static mixer Before 4;One of the dehydrated outlet of centrifugal dehydrator IV is directly discharged into water body, another with coagulant mixing dosing system II Anion PAM is connected with tubbing 9 and cationic PAM with tubbing 11.
Specifically, it is blind to be followed successively by tool overflow pipe from up to down for the main body of level-one hydrocyclone 1 and second level hydrocyclone 2 Plate 13, double inlet flanges 14, straight pipe vortex chamber 15, conical section vortex chamber 16 and underflow pipe 17, each section use flanged joint; Double inlet flange disks 14 use tapered cross-section linear type entry mode, and sectional dimension is selected according to treatment scale and dredged mud aqueous nature Select different size.Has the specification of overflow pipe blind plate 13, straight pipe vortex chamber 15, conical section vortex chamber 16 and underflow pipe 17 according to place Reason scale and dredged mud aqueous nature select different size.The cone angle of the conical section vortex chamber 16 of level-one hydrocyclone 1 is 10 °, The cone angle of the conical section vortex chamber 16 of second level hydrocyclone 2 is 5 °.Level-one hydrocyclone 1 and second level hydrocyclone 2 remove Conical section vortex chamber cone angle is different outer, remaining structure type is identical.
The present invention dredges muddy water in level-one hydrocyclone using two-stage series connection hydrocyclone separation technology and centrifugal dehydration as core It completes that volume reduction is concentrated in 1, the reduction of completion overflow clear liquid concentration of suspension in second level hydrocyclone 2, in centrifugal dehydrator IV Dehydration volume reduction is completed, finally realizes the qualified discharge of efficient volume reduction and overflow clear liquid.The present invention is subtracted using hydrocyclone Hold, separation of solid and liquid process is completed rapidly, efficiently, and system bulk and occupied area are small, convenient for implementing on dredging vessel;Using dredge Ship dredge pump self power condition is dredged, the high-velocity flow needed for forming hydraulic cyclone in hydrocyclone systems has low-loss and energy-saving Significant advantage;Strengthen concentration volume reduction using anion PAM and cationic PAM and concentration of suspension is cut down, it is aqueous to dredged mud Qualitative changeization is adaptable;By changing the sectional dimension of double inlet flange tapered cross-section linear type entrances, system was to dredging The adaptability of changes in flow rate gets a promotion in journey.In short, the present invention has, low energy consumption, high efficiency, occupied area is small, adapts to energy Power is strong, water outlet can the advantages such as qualified discharge.
It is described further below with reference to embodiment.
Present embodiment is using the dredging muddy water that south China city black and odorous water environmental dredging generates in the process as place Object is managed, builds the midget plant of dredging muddy water efficiently volume reduction in situ, treatment scale 20m in dredged mud Large Water Treatment Field3/h.Dredge pump Lift is 30m.The moisture content of dredging muddy water to be processed is between 98%~99%.
Refering to fig. 1 and Fig. 2, dredging muddy water are sent into two-stage series connection hydrocyclone systems III by dredge pump I, and wherein level-one waterpower is revolved Flow device 1 15 diameter 35cm of straight pipe vortex chamber, high 35cm, 16 top diameter 35cm of conical section vortex chamber, base diameter 5cm, 10 ° of cone angle;The cone angle of the conical section vortex chamber 16 of second level hydrocyclone 2 is 5 °, the same first order of remaining structure size.Dredged mud Water completes solid-liquid point with after the anion PAM of coagulant mixing dosing system II mixing in level-one hydrocyclone 1 From, underflow spoil disposal is sent to centrifugal dehydrator IV by pressure itself and is dehydrated, level-one overflowing liquid with come from coagulant mixing dosing system Enter second level hydrocyclone 2 after II cationic PAM mixing, continues to be separated by solid-liquid separation, underflow spoil disposal is sent by pressure itself It is dehydrated to centrifugal dehydrator IV, overflowing liquid is discharged into water body.
Simultaneously refering to fig. 1, Fig. 2 and Fig. 3, dredging muddy water aspirates by dredge pump I, and in coagulant mixing dosing system II The anion PAM that anion PAM adds 10 pumping of pump is mixed in level-one tubular static mixer 3, the molecular weight of anion PAM It is 3,000,000, dosage is 2mg/g dewatered sludge.Dredging muddy water after hybrid reaction enters level-one hydraulic cyclone with the flow velocity of 5m/s Double inlet flanges 14 of device 1.By adjusting the open degree of level-one underflow tube valve 5 and level-one overflow tube valve 6, level-one water is controlled The split ratio (underflow flow/total flow) of power cyclone 1 be 0.05, hydraulic cyclone effect under, greater particle size particle due to from Mental and physical efforts move to hydrocyclone side wall, and the level-one underflow row to form moisture content 82~90% is moved downward along side wall Mud, water and lesser particle are then moved to the low-pressure area of hydrocyclone near axis, and move upwards that form level-one overflow clear Liquid.Level-one underflow spoil disposal is dehydrated under pressure itself effect into centrifugal dehydrator IV.Level-one overflow clear liquid has overflow certainly On pipe blind plate 13 overflow port discharge, in coagulant mixing dosing system II cationic PAM add pump 12 pump sun Ion PAM is mixed in second level tubular static mixer 4, and the molecular weight of cationic PAM is 15,000,000, and dosage is dry for 4mg/g Sludge.Level-one overflow clear liquid after hybrid reaction enters double inlet flanges 14 of second level hydrocyclone 2 with the flow velocity of 4.8m/s. By adjusting the open degree of second level overflow tube valve 7 and second level underflow tube valve 8, the split ratio of second level hydrocyclone 2 is controlled (underflow flow/total flow) is 0.05.After the separation of solid and liquid of second level hydrocyclone 2, the second level of moisture content 88~90% is formed Underflow spoil disposal and concentration of suspension are lower than the second level overflow clear liquid of 400mg/L.Second level underflow spoil disposal merges with level-one underflow spoil disposal Enter centrifugal dehydrator IV afterwards to be dehydrated, second level overflow clear liquid is directly discharged into water body.Underflow spoil disposal is de- through centrifugal dehydrator IV The mud cake of moisture content 60% or so is formed after water, mud cake is lightered to land and handled, and dehydration filtrate a part is sent to coagulant The anion PAM mixed in dosing system II matches tubbing 11 with tubbing 9 and cationic PAM, for configuring coagulated agent.
Refering to Fig. 4, the anion PAM effect for improving level-one hydrocyclone thickening efficiency is illustrated, anion is worked as PAM molecular weight is 3,000,000, when dosage is 2mg/g dewatered sludge, under the conditions of identical split ratio, level-one hydrocyclone 1 Thickening efficiency dramatically increases.When split ratio is 0.05, separative efficiency can be increased to by not adding 21% when anion PAM 62% or so.It confirms and the thickening efficiency of dredging muddy water can be improved by adding anion PAM.
Refering to Fig. 5, the effect for cutting down water outlet concentration of suspension to cationic PAM is illustrated.As cationic PAM adds The increase of amount, system water outlet concentration of suspension continue to increase.When dosage is 4mg/g dewatered sludge, water outlet concentration of suspension is small In 400mg/g dewatered sludge, reach " integrated wastewater discharge standard " (GB8978-96) grade III Standard, it can be with direct emission.
Certainly, the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-mentioned reality Applying example, invention is explained in detail, it should be understood by a person of ordinary skill in the art that still can be to the present invention Specific embodiment be modified or replaced equivalently, and any modification without departing from spirit and scope of the invention or equivalent Replacement, should all cover within the scope of the claims of the present invention.

Claims (7)

1. a kind of method of dredging muddy water efficiently volume reduction in situ, revolves it is characterized in that: two-stage series connection waterpower is arranged on dredging vessel Streaming system, centrifugal dehydrator are connected directly with two-stage series connection hydrocyclone systems, dredging vessel suction dredging muddy water with come from Enter two-stage hydrocyclone systems after the coagulant mixing of coagulant mixing dosing system and carry out concentration volume reduction treatment, after volume reduction Concentration spoil disposal is discharged into centrifugal dehydrator dehydration, and overflow clear liquid is directly discharged into water body;
Using dredge pump (I) the suction dredging muddy water of dredging vessel, dredging muddy water with come from coagulant mixing dosing system (II) After coagulant mixing, the level-one hydrocyclone into two-stage series connection hydrocyclone systems (III) is separated by solid-liquid separation, and is obtained dense Contracting body refuse and level-one overflow clear liquid;After level-one overflow clear liquid is mixed with the coagulant from coagulant mixing dosing system (II), Second level hydrocyclone into two-stage series connection hydrocyclone systems (III) is separated by solid-liquid separation, and obtains concentration body refuse and second level is overflow Flow clear liquid;Second level overflow clear liquid is directly discharged into water body and enters after concentration body refuse merges with the concentration body refuse of level-one hydrocyclone Centrifugal dehydrator (IV) carries out centrifugal dehydration;Dehydrated sludge cake is lightered to disposal by land, and dehydration filtrate a part is directly discharged into water body, A part is sent into coagulant mixing dosing system (II) and configures coagulant;
Coagulant mixing dosing system (II) includes anion PAM and cationic PAM, and anion PAM toss area is located at level-one water Before power cyclone, cationic PAM toss area is located at before second level hydrocyclone.
2. the method for dredging muddy water efficiently volume reduction in situ according to claim 1, it is characterized in that: the anion PAM points Son amount is between 200~5,000,000, and the cationic PAM molecular weight is between 1000~20,000,000.
3. the device of the dredging muddy water described in claim 1 efficiently method of volume reduction in situ is realized, it is characterized in that: including dredge pump (I), coagulant mixing dosing system (II), two-stage series connection hydrocyclone systems (III) and centrifugal dehydrator (IV), described two Grade series connection hydrocyclone systems (III) is by concatenated level-one tubular static mixer (3), level-one hydrocyclone (1), diode Formula static mixer (4) and second level hydrocyclone (2) composition, the outlet of the dredge pump (I) are quiet with the level-one tubular type The import of state mixer (3) connects, and the bottom of the level-one hydrocyclone (1) is connected with level-one underflow tube valve (5), out Mouth is connected with level-one overflow tube valve (6);The bottom of the second level hydrocyclone (2) is connected with second level underflow tube valve (8), outlet is connected with second level overflow tube valve (7);The level-one underflow tube valve (5) and second level underflow tube valve (8) Outlet is connect with centrifugal dehydrator (IV);The overflow clear liquid of second level overflow tube valve (7) discharge is directly discharged into water body;Institute The coagulant mixing dosing system (II) stated is connect with tubbing (9), with the anion PAM with tubbing (9) by anion PAM Anion PAM add pump (10), cationic PAM with tubbing (11) and with cationic PAM with tubbing (11) connect it is positive from Sub- PAM adds pump (12) composition, and anion PAM is added before pump (10) is connected to level-one tubular static mixer (3) import, it is positive from Sub- PAM is added before pump (12) is connected to the import of second level tubular static mixer (4);The dehydration of the centrifugal dehydrator (IV) One of outlet is directly discharged into water body, another with the anion PAM of the coagulant mixing dosing system (II) It is connected with tubbing (9) and the cationic PAM with tubbing (11).
4. the device according to claim 3 for realizing the dredging muddy water efficiently method of volume reduction in situ, it is characterized in that: described The main body of level-one hydrocyclone (1) and second level hydrocyclone (2) be followed successively by from up to down tool overflow pipe blind plate (13), it is double enter Mouth flange (14), straight pipe vortex chamber (15), conical section vortex chamber (16) and underflow pipe (17), each section use flanged joint.
5. the device according to claim 4 for realizing the dredging muddy water efficiently method of volume reduction in situ, it is characterized in that: described The cone angle of the conical section vortex chamber (16) of level-one hydrocyclone (1) is 10 °.
6. the device according to claim 4 for realizing the dredging muddy water efficiently method of volume reduction in situ, it is characterized in that: described The cone angle of the conical section vortex chamber (16) of second level hydrocyclone (2) is 5 °.
7. the device according to claim 4 for realizing the dredging muddy water efficiently method of volume reduction in situ, it is characterized in that: described Double inlet flange disks (14) use tapered cross-section linear type entry mode.
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Citations (4)

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Publication number Priority date Publication date Assignee Title
EP0256599A3 (en) * 1986-08-19 1988-09-28 Metallgesellschaft Ag Dehydration of fine-grained mud from waters
CN202744428U (en) * 2012-03-16 2013-02-20 天津清华德人环境工程有限公司 River sediment sieving, oxidation reducing and deep dewatering device
CN103288324A (en) * 2013-05-28 2013-09-11 长沙理工大学 Method and device for in-situ solid-liquid separation of dredged muddy water
CN105600993A (en) * 2016-02-18 2016-05-25 长江勘测规划设计研究有限责任公司 Treatment method and device for high-concentration suspended matter waste water

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0256599A3 (en) * 1986-08-19 1988-09-28 Metallgesellschaft Ag Dehydration of fine-grained mud from waters
CN202744428U (en) * 2012-03-16 2013-02-20 天津清华德人环境工程有限公司 River sediment sieving, oxidation reducing and deep dewatering device
CN103288324A (en) * 2013-05-28 2013-09-11 长沙理工大学 Method and device for in-situ solid-liquid separation of dredged muddy water
CN105600993A (en) * 2016-02-18 2016-05-25 长江勘测规划设计研究有限责任公司 Treatment method and device for high-concentration suspended matter waste water

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