CN107200461A - A kind of process for treating sludge - Google Patents

A kind of process for treating sludge Download PDF

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Publication number
CN107200461A
CN107200461A CN201710639563.9A CN201710639563A CN107200461A CN 107200461 A CN107200461 A CN 107200461A CN 201710639563 A CN201710639563 A CN 201710639563A CN 107200461 A CN107200461 A CN 107200461A
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China
Prior art keywords
mud
water
parts
treating sludge
space
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CN201710639563.9A
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Chinese (zh)
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CN107200461B (en
Inventor
文桃
应赛
游强
熊平
刘东升
王升
舒云建
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Yangtze Normal University
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Yangtze Normal University
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Priority to CN201710639563.9A priority Critical patent/CN107200461B/en
Publication of CN107200461A publication Critical patent/CN107200461A/en
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Expired - Fee Related legal-status Critical Current
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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
    • 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 process for treating sludge, including carrying out the step of drainage draws water to mud, its feature is, in addition to the step of processing improves its hard fragility and foamed first is modified to mud, and carries out the step of strong rammer realizes water squeezing draining to mud after modification.Residual moisture after sludge dewatering speed, sludge dewatering is less with that can improve by the present invention, the characteristics of mud after dehydration can have more preferable engineering.

Description

A kind of process for treating sludge
Technical field
The present invention relates to sludge treatment technical field;More particularly to a kind of process for treating sludge.
Background technology
The fast, economical development of China brings water conservancy, the climax of harbor approach engineering construction, in various river courses, navigation channel During dredging and widening and harbour is newly-built, in extension project, is inevitably generated substantial amounts of waste silt.According to incomplete Statistics, the mud that China discards every year reaches several hundred million cubic meters:The wherein coastal area such as East Sea, Beihai Region generates a great deal of Mud, while in order to river course be able to maintain that normal flood carrying capacity and ensure thoroughfare unimpeded, the dredging in inland river course The amount of sludge that quantities is produced is also considerable.Overwhelming majority inland dredging silt is discarded in land throwing area or low at present Depression area, the original fish pond of some occupancy or cultivated land, and soil is valuable at present, land expropriation cost is very high, the eastern line of such as south water to north The funds of first phase land acquisition account for 60% or so of engineering total cost.
The main purpose of existing process for treating sludge is dehydration, and the process for treating sludge commonly used in engineering is using outer Power extrudes mud internal moisture.Chinese patent CN101219297A discloses a kind of U-shaped soft vacuum dredged silt Quick drainage Method, it is characterised in that multiple rows of U-shaped sand pocket is first set up on the ground of cofferdam, wherein the two ends of U-shaped sand pocket pass through the first water respectively The longitudinal airway tube of level is connected with horizontal longitudinal drainage pipeline and even for flat transverse drain or the second horizontal cross drainpipe, water Flat longitudinal drainage pipeline connects vacuum extractor, and level longitudinal direction airway tube connection gas permeable devices form U-shaped space drainage system;Becoming silted up During mud hydraulic reclamation between the hydraulic reclamation later stage, the ventilative valve of regulation is under low vacuum by drainage system to be drawn water, it is ensured that draining is led to Unimpeded, the promotion mud-water separation in road, the concentration of the raising mud of larger amplitude.This method produces negative pressure using vacuum extractor, Mud-water separation can be promoted.But the equipment employed in this method and method can not carry out deep dehydration, place to mud Mud water content after reason is high, and engineering properties is poor, and still larger stacking face can be taken compared with the mud after deep dehydration Product, hidden dangers in project is big, the problems such as overlapping development utilizes the cycle long.
Therefore, how can providing one kind, can to improve after sludge dewatering speed, sludge dewatering residual moisture less, takes off Mud after water can have the process for treating sludge of more preferable engineering, there is technology to be solved as those skilled in the art Problem.
The content of the invention
For above-mentioned the deficiencies in the prior art, the technical problems to be solved by the invention are:How providing one kind can carry Residual moisture is less after high sludge dewatering speed, sludge dewatering, and the mud after dehydration can have the mud of more preferable engineering Processing method.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme:
A kind of process for treating sludge, including the step of drainage draws water is carried out to mud, its feature is, in addition to first mud is entered The step of row modification improves its hard fragility and foamed, and water squeezing draining is realized to mud progress strong rammer after modification Step.
In the technical program, drainage first is carried out to mud and drawn water, now, the part moisture in mud is deviate to take away.It is logical Cross and processing is modified to mud, it is possible to increase the hard fragility of mud simultaneously foams to mud, in such manner, it is possible to so that be produced inside mud Raw a large amount of holes, and quick-hardening, brittle property increase, while hydrophily weakens, hydrophobicity enhancing.By to modified silt Mud carries out strong rammer and realizes water squeezing draining, and bubbles burst during strong rammer inside mud can form a large amount of transverse cracks and in water Square drainage channel is upwardly formed, while very big excess pore water pressure is internally formed in mud, so that mud internal water Shunt the madial wall to device for treating sludge.So as to reach the dehydrating effect for realizing fast dewatering and depth.
As optimization, employ following equipment and realize, the equipment includes permeable layer assembly, the permeable layer assembly encloses The mud placement space of the rectangular bodily form of entirety set into opening upwards, ponding is provided with the circumferential outside of permeable layer assembly The input port conducting connection of space, the ponding space and aspirator, in addition to be arranged at strong on the outside of mud placement space Device is rammed, the strong rammer device includes being arranged at the strong rammer hammer above mud placement space, and the strong rammer hammer can be put along mud Depth direction between being empty is moved downwardly in mud placement space carry out strong rammer operation.
So, mud is positioned in mud placement space, the part moisture inside mud can be directly through pervious bed Component is flowed into ponding space, now, and ponding interior volume can will be flowed into by turning on the aspirator being connected with ponding space Ponding be retracted to ponding outside, be reached for the function of sludge dewatering.Special agent is added in mud simultaneously to mud Processing is modified, mud is stirred with special agent, is carried out again at strong rammer after mud and special agent fully react Reason.Sludge dewatering speed can be improved, additionally it is possible to which, so that residual moisture is less after sludge dewatering, the mud after dehydration can have More preferable engineering.The mud placement space of the rectangular bodily form can be matched preferably with strong rammer hammer.
As optimization, in addition to the barrel-shaped foundation ditch that opening upwards are set, the permeable layer assembly includes being cylindrical in shape structure and vertical The geotextiles in foundation ditch are arranged at, the porous screed with water penetration is provided with the outer sheath of geotextiles;The bottom surface of foundation ditch with Mud placement space is surrounded between the madial wall of geotextiles, and the ponding space is arranged at the outside of porous screed.
So, whole permeable layer assembly is inserted in foundation ditch, it can be made to keep original shape facility, even outside Original shape can be also kept under power effect.Geotextiles have the characteristics of strength is high, corrosion-resistant, water penetration is strong, using geotechnique The medial surface of cloth is directly contacted with mud can also enable geotextiles to have not with the mud placement space that foundation ditch bottom surface is surrounded It is yielding, can be muchly corrosion-resistant in the soil and water of different acid-base values, enable to whole equipment that there is longer make With the life-span, the advantage of good water penetration can be kept.Porous screed is set to enable to mud to put in the outside of geotextiles Deformation is not produced between being empty, the shape that preferably can be so hammered into shape with the strong rammer of strong rammer device is matched.
As optimization, the bottom surface in the ponding space flushes setting with the bottom surface lowest part of mud placement space;In mud The bottom of placement space is provided with metalling, and sand stone layer is additionally provided with above metalling.
So, the sewage deviate from the mud for flow through bottom of foundation ditch can be by the filtering of coarse sands layer and metalling in stream Enter into ponding space, it is possible to increase effluent characteristics.Secondly, when the strong rammer of strong rammer device is hammered into shape to the mud in mud placement space When carrying out strong rammer, cushioning effect can be played by being arranged on the metalling and sand stone layer of foundation ditch bottom surface, can play protection foundation ditch Effect.
As optimization, the center of the bottom surface of the foundation ditch is arched upward upwards so that whole bottom surface forms past from bottom surface surrounding The inclined-plane that bottom center's gradual change rises.
So, be conducive to the sewage deviate from from mud to be evenly dispersed to the surrounding of foundation ditch bottom surface, facilitate sewage to discharge.
As optimization, drain bar is additionally provided between geotextiles and porous screed.
So, drain bar is additionally provided between geotextiles and porous screed to prevent dirt particles from passing through, so that Drainage channel obstruction is avoided to make duct draining smooth.It quickly can also effectively export the sewage through geotechnological layer of cloth in mud.
As optimization, reja is provided with the upper end open in ponding space.
So, be conducive to operating personnel to walk, effectively prevent debris from falling to ponding interior volume.
As optimization, the aspirator includes the water pump positioned at foundation ditch side, the entrance point of the water pump be connected with into Water pipe, the other end of the water inlet pipe extend into the bottom in ponding space through the grid that the reja has, and water pump goes out Mouth end is connected with outlet pipe, and the other end of the outlet pipe is connected with the sedimentation basin positioned at water pump side.
So, the sewage of ponding interior volume can be retracted in sedimentation basin by water pump so that the water after sludge dewatering is followed Ring is unimpeded, can be conducive to sludge dewatering.
As optimization, employ following modification special agent and be modified processing, the composition and matter of the special agent Measuring proportioning is, 120 ~ 300 parts of cement, 250 ~ 500 parts of quick lime, 0.5 ~ 3.0 part of aluminium powder, 3 ~ 6 parts of water reducer, accelerator 5 ~ 10 parts and 0.02 ~ 0.1 part of foam stabilizer.
So, the cement in special agent can reduce mud hydrophily, the hard fragility of increase mud, improve mud intensity; Quick lime can reduce mud hydrophily, the hard fragility of increase mud, improve mud intensity, disinfection, reduce the pollution of mud Property;Aluminium powder can foam mud, mud hardening when produce a large amount of bubbles, form the hole largely connected, form fag end passage, Increase mud permeability;Water reducer can increase mud moisture surface activity, make reagent be more easy to mix with mud;Accelerator can add Fast hardening of cement speed, rapid curing mud effectively shortens the sludge dewatering time.So as to improve sludge dewatering efficiency and reach To the dehydrating effect of depth.
As optimization, the best in quality proportioning of the special agent is 260 parts of cement, 420 parts of quick lime, aluminium powder 1.8 Part, 5.6 parts of water reducer, 7.8 parts of accelerator and 0.08 part of foam stabilizer.
So, using the special agent of optimum proportioning enable to each component given play to maximum effect, each component it Between influence each other it is smaller.
Brief description of the drawings
Fig. 1 is the structural representation of device for treating sludge in the specific embodiment of the invention.
Fig. 2 is Fig. 1 top view(Strong rammer device and sedimentation basin are omitted in figure).
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
During specific implementation:As depicted in figs. 1 and 2, a kind of process for treating sludge, including the step that drainage draws water is carried out to mud Suddenly, the step of processing improves its hard fragility and foamed in addition to first to mud is modified, and mud is entered after modification The step of row strong rammer realizes water squeezing draining.
In the technical program, drainage first is carried out to mud and drawn water, now, the part moisture in mud is deviate to take away.It is logical Cross and processing is modified to mud, it is possible to increase the hard fragility of mud simultaneously foams to mud, in such manner, it is possible to so that be produced inside mud Raw a large amount of holes, and quick-hardening, brittle property increase, while hydrophily weakens, hydrophobicity enhancing.By to modified silt Mud carries out strong rammer and realizes water squeezing draining, and bubbles burst during strong rammer inside mud can form a large amount of transverse cracks and in water Square drainage channel is upwardly formed, while very big excess pore water pressure is internally formed in mud, so that mud internal water Shunt the madial wall to device for treating sludge.So as to reach the dehydrating effect for realizing fast dewatering and depth.
In this specific embodiment, employ following equipment and realize, the equipment includes permeable layer assembly 1, described Water layer component 1 surrounds the mud placement space of the rectangular bodily form of entirety of opening upwards setting, in the outer of the permeable circumference of layer assembly 1 Side is provided with ponding space, and the ponding space is connected with the input port conducting of aspirator 2, in addition to is arranged at mud placement Strong rammer device 3 on the outside of space, the strong rammer device 3 includes being arranged at the strong rammer hammer 31 above mud placement space, described strong Hammer ram 31 can be moved downwardly in mud placement space carry out strong rammer operation along the depth direction of mud placement space.
So, mud is positioned in mud placement space, the part moisture inside mud can be directly through pervious bed Component is flowed into ponding space, now, and ponding interior volume can will be flowed into by turning on the aspirator being connected with ponding space Ponding be retracted to ponding outside, be reached for the function of sludge dewatering.Special agent is added in mud simultaneously to mud Processing is modified, mud is stirred with special agent, is carried out again at strong rammer after mud and special agent fully react Reason.Sludge dewatering speed can be improved, additionally it is possible to which, so that residual moisture is less after sludge dewatering, the mud after dehydration can have More preferable engineering.The mud placement space of the rectangular bodily form can be matched preferably with strong rammer hammer.
In this specific embodiment, in addition to the barrel-shaped foundation ditch 4 that opening upwards are set, the permeable layer assembly 1 is including being in Tubular structure and the geotextiles 11 being vertically arranged in foundation ditch 4, are provided with porous with water penetration in the outer sheath of geotextiles 11 Screed 12;Mud placement space is surrounded between the bottom surface of foundation ditch 4 and the madial wall of geotextiles 11, and the ponding space is set It is placed in the outside of porous screed 12.
So, whole permeable layer assembly is inserted in foundation ditch, it can be made to keep original shape facility, even outside Original shape can be also kept under power effect.Geotextiles have the characteristics of strength is high, corrosion-resistant, water penetration is strong, using geotechnique The medial surface of cloth is directly contacted with mud can also enable geotextiles to have not with the mud placement space that foundation ditch bottom surface is surrounded It is yielding, can be muchly corrosion-resistant in the soil and water of different acid-base values, enable to whole equipment that there is longer make With the life-span, the advantage of good water penetration can be kept.Porous screed is set to enable to mud to put in the outside of geotextiles Deformation is not produced between being empty, the shape that preferably can be so hammered into shape with the strong rammer of strong rammer device is matched.
In this specific embodiment, the bottom surface in the ponding space flushes with the bottom surface lowest part of mud placement space and set Put;The bottom of mud placement space is provided with metalling 5, sand stone layer 6 is additionally provided with the top of metalling 5.
So, the sewage deviate from the mud for flow through bottom of foundation ditch can be by the filtering of coarse sands layer and metalling in stream Enter into ponding space, it is possible to increase effluent characteristics.Secondly, when the strong rammer of strong rammer device is hammered into shape to the mud in mud placement space When carrying out strong rammer, cushioning effect can be played by being arranged on the metalling and sand stone layer of foundation ditch bottom surface, can play protection foundation ditch Effect.
In this specific embodiment, the center of the bottom surface of the foundation ditch 4 arch upward upwards so that whole bottom surface formed from The inclined-plane that bottom surface surrounding rises toward bottom center's gradual change.
So, be conducive to the sewage deviate from from mud to be evenly dispersed to the surrounding of foundation ditch bottom surface, facilitate sewage to discharge.
Wherein, foundation ditch 4 bottom surface formed inclined-plane the gradient be two to percent four percent between.
So, the coarse sand while sewage in being conducive to mud flows to bottom surface surrounding above foundation ditch bottom surface Layer and metalling are difficult to move around to bottom surface under the effect of strong rammer pressure.
In this specific embodiment, drain bar 13 is additionally provided between geotextiles 11 and porous screed 12.
So, drain bar is additionally provided between geotextiles and porous screed to prevent dirt particles from passing through, so that Drainage channel obstruction is avoided to make duct draining smooth.It quickly can also effectively export the sewage through geotechnological layer of cloth in mud.
In this specific embodiment, reja 7 is provided with the upper end open in ponding space.
So, be conducive to operating personnel to walk, effectively prevent debris from falling to ponding interior volume.
In this specific embodiment, the aspirator 2 includes the water pump 21 positioned at the side of foundation ditch 4, the water pump 21 Entrance point is connected with water inlet pipe 22, and the other end of the water inlet pipe 22 extend into ponding through the grid that the reja 7 has The bottom in space, the port of export of water pump 21 is connected with outlet pipe 23, and the other end of the outlet pipe 23 is with being located at the side of water pump 21 Sedimentation basin 8 connect.
So, the sewage of ponding interior volume can be retracted in sedimentation basin by water pump so that the water after sludge dewatering is followed Ring is unimpeded, can be conducive to sludge dewatering.
In this specific embodiment, employ following modification special agent and be modified processing, the special agent Composition and quality proportioning be, 120 ~ 300 parts of cement, 250 ~ 500 parts of quick lime, 0.5 ~ 3.0 part of aluminium powder, 3 ~ 6 parts of water reducer, 0.02 ~ 0.1 part of 5 ~ 10 parts of accelerator and foam stabilizer.
So, the cement in special agent can reduce mud hydrophily, the hard fragility of increase mud, improve mud intensity; Quick lime can reduce mud hydrophily, the hard fragility of increase mud, improve mud intensity, disinfection, reduce the pollution of mud Property;Aluminium powder can foam mud, mud hardening when produce a large amount of bubbles, form the hole largely connected, form fag end passage, Increase mud permeability;Water reducer can increase mud moisture surface activity, make reagent be more easy to mix with mud;Accelerator can add Fast hardening of cement speed, rapid curing mud effectively shortens the sludge dewatering time.So as to improve sludge dewatering efficiency and reach To the dehydrating effect of depth.
In this specific embodiment, the best in quality of special agent proportioning is 260 parts of cement, 420 parts of quick lime, 0.08 part of 1.8 parts of aluminium powder, 5.6 parts of water reducer, 7.8 parts of accelerator and foam stabilizer.
So, using the special agent of optimum proportioning enable to each component given play to maximum effect, each component it Between influence each other it is smaller.

Claims (10)

1. a kind of process for treating sludge, including the step of drainage draws water is carried out to mud, it is characterised in that also including first to mud The step of processing improves its hard fragility and foamed is modified, and strong rammer is carried out to mud after modification and realizes water squeezing draining The step of.
2. a kind of process for treating sludge as claimed in claim 1, it is characterised in that employ following equipment and realize, described Equipment includes permeable layer assembly(1), the permeable layer assembly(1)Surround the mud of the rectangular bodily form of entirety of opening upwards setting Placement space, in permeable layer assembly(1)Circumferential outside is provided with ponding space, the ponding space and aspirator(2)'s Input port conducting connection, in addition to it is arranged at the strong rammer device on the outside of mud placement space(3), the strong rammer device(3)Including It is arranged at the strong rammer hammer above mud placement space(31), the strong rammer hammer(31)Can along mud placement space depth direction It is moved downwardly in mud placement space carry out strong rammer operation.
3. a kind of process for treating sludge as claimed in claim 2, it is characterised in that the barrel-shaped base also set including opening upwards Hole(4), the permeable layer assembly(1)Including being cylindrical in shape structure and being vertically arranged to foundation ditch(4)Interior geotextiles(11), in geotechnique Cloth(11)Outer sheath be provided with water penetration porous screed(12);Foundation ditch(4)Bottom surface and geotextiles(11)Inner side Mud placement space is surrounded between wall, and the ponding space is arranged at porous screed(12)Outside.
4. a kind of process for treating sludge as claimed in claim 3, it is characterised in that put with mud the bottom surface in the ponding space Bottom surface lowest part between being empty flushes setting;The bottom of mud placement space is provided with metalling(5), in metalling(5)'s Top is additionally provided with sand stone layer(6).
5. a kind of process for treating sludge as claimed in claim 4, it is characterised in that the foundation ditch(4)Bottom surface centre bit Putting to arch upward upwards causes whole bottom surface to form the inclined-plane risen from bottom surface surrounding toward bottom center's gradual change.
6. a kind of process for treating sludge as claimed in claim 3, it is characterised in that in geotextiles(11)With porous screed (12)Between be additionally provided with drain bar(13).
7. a kind of process for treating sludge as claimed in claim 3, it is characterised in that set at the upper end open in ponding space There is reja(7).
8. a kind of process for treating sludge as claimed in claim 7, it is characterised in that the aspirator(2)Including positioned at base Hole(4)The water pump of side(21), the water pump(21)Entrance point be connected with water inlet pipe(22), the water inlet pipe(22)It is another Hold through the reja(7)The grid having extend into the bottom in ponding space, water pump(21)The port of export be connected with water outlet Pipe(23), the outlet pipe(23)The other end with positioned at water pump(21)The sedimentation basin of side(8)Connection.
9. a kind of process for treating sludge as described in claim 1 to 8 any one claim, it is characterised in that employ Following modification special agent is modified processing, and the composition and quality proportioning of the special agent be, 120 ~ 300 parts of cement, 0.02 ~ 0.1 part of 250 ~ 500 parts of quick lime, 0.5 ~ 3.0 part of aluminium powder, 3 ~ 6 parts of water reducer, 5 ~ 10 parts of accelerator and foam stabilizer.
10. a kind of process for treating sludge as claimed in claim 9, it is characterised in that the best in quality of the special agent is matched somebody with somebody Than for 0.08 part of 260 parts of cement, 420 parts of quick lime, 1.8 parts of aluminium powder, 5.6 parts of water reducer, 7.8 parts of accelerator and foam stabilizer.
CN201710639563.9A 2017-07-31 2017-07-31 Sludge treatment method Expired - Fee Related CN107200461B (en)

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Application Number Priority Date Filing Date Title
CN201710639563.9A CN107200461B (en) 2017-07-31 2017-07-31 Sludge treatment method

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Publication number Priority date Publication date Assignee Title
CN110761271A (en) * 2019-10-18 2020-02-07 中铁八局集团第六工程有限公司 Construction process for treating soft soil of roadbed by using riprap sludge squeezing method

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Publication number Priority date Publication date Assignee Title
CN110761271A (en) * 2019-10-18 2020-02-07 中铁八局集团第六工程有限公司 Construction process for treating soft soil of roadbed by using riprap sludge squeezing method

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