CN103539330A - Stacked sludge drying method for sludge storage yards - Google Patents

Stacked sludge drying method for sludge storage yards Download PDF

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Publication number
CN103539330A
CN103539330A CN201210251005.2A CN201210251005A CN103539330A CN 103539330 A CN103539330 A CN 103539330A CN 201210251005 A CN201210251005 A CN 201210251005A CN 103539330 A CN103539330 A CN 103539330A
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China
Prior art keywords
mud
sludge
layer
grid
cement
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Pending
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CN201210251005.2A
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Chinese (zh)
Inventor
朱海亮
祝迪迪
洪超
赵长坡
杨雨顺
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Nanjing University
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Nanjing University
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Priority to CN201210251005.2A priority Critical patent/CN103539330A/en
Publication of CN103539330A publication Critical patent/CN103539330A/en
Pending legal-status Critical Current

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Abstract

The invention provides a novel sludge drying method. The design is used for medium and large sludge storage yards, and a novel solution is proposed for solving the drying problem of a great deal of sludge in the sludge storage yards. The design is realized from bottom to top as follows: a cement poured grid supporting layer (grid area: 0.1m*0.1m-2m*2m), a bamboo piece net layer, a crude rubble layer and a sludge storage layer. Sewage in sludge firstly penetrates through the crude rubble layer, sequentially passes through the bamboo piece net layer and the cement poured grid supporting layer, finally flows to a slope with the gradient of 4, and is discharged into a sewage treatment system, so that the aim of drying the sludge is achieved.

Description

The stacked mud mummification of silt stockyard method
One, technical field
The invention belongs to field of environment engineering technology, be specifically related to the method for design of the stacked mud mummification of silt stockyard method and illustrate.
Two, background technology
Along with the fast development of Chinese society economy, urban population sharply increases, and to the blowdown flow rate in city river, lake, day by day increases, and water pollutes and is on the rise, and quality of water environment goes from bad to worse.Very urgent to the processing of the dredging in river course, lake, desilting and bed mud thereof, be directly connected to resident's living environment.The amount of sludge producing in China lake, river dredging engineering process at present has reached surprising degree.The development of mud-water separation technology and equipment is extremely urgent, and its development will directly affect lake, the modernization of river dredging engineering and the development process in city.Especially large-and-medium size cities He Hu silts up and pollutes the international image that has influence on China, and the solution of this problem, will obtain obvious environmental benefit and social benefit.How the mud that how to carry out environment-protective desilting, clears out is processed is the problem that current international community is all being inquired into.If it is bad that certain link is processed, desilting engineering will be brought serious, large-area secondary pollution, and consequence is hardly imaginable.
Developed country pays much attention to the processed of urban water-body desilting and mud, and the comprehensive utilization to mud after dewatering, and has carried out research extensively and profoundly, and has formed industry.At present, the mud in Hong Kong all carries out landfill, and European Sludge landfill Zhan42%, U.S. Sludge landfill accounts for 35%, and Canadian Sludge landfill accounts for 30%, and Japanese Sludge landfill accounts for 24%.According to EPA, estimate, from now on the more than ten years, 6500 landfill yards of the U.S. will have 5000 to close.Mud is back to the developing direction that farmland is Ying, Mei,Fa Deng state sludge disposal, and the agricultural rate of municipal sludge is more than 70%, have up to more than 80%.External sludge dewatering method roughly has following several:
(1) solidification treatment in.This method is to help on the basis of feed technique in aerating, with air compressor, adds solidify material (agglutinant) aerating force feed.The agglutinant that mud in dredging tube is added into progressively solidifies, and reaches the object of dehydration.By the strength of expanded air, before being blown slowly, the mud in pipe is transferred to spoil disposal field;
(2) classification press dewatering.The mud that desilting equipment clears out carries out sub-sieve by silt separation apparatus, and isolated sandstone can effectively utilize, and in isolated muddy water, adds solidifying agent, then carries out high-pressure compressing dehydration;
(3) portable continuously dehydrating.Mud dehydration plant is placed on vehicle or boats and ships to equipment tool mobility.Mud enters coagulation sedimentation groove continuously, adds harmless agglutinant in coagulation sedimentation groove, then carries out vacuum hydro-extraction and carry out transporting in time after sterilizing thermal treatment, and water reaches emission request;
(4) high press-dehydrating.This method is continous way dehydration, and processing power is strong, wide accommodation.Its flow process is: in mud, add polymer coagulant, be introduced into and in tablets press, carry out primary dewatering (low pressure), then carry out second dehydration (high pressure).
But these dewaterings need to expend mass energy, at present, domestic desilting mainly takes to pile the mode of mud field or landfill yard to the treatment process of bed mud, and specific practice is:
(1) lay end filter material layer: on barged-in fill surface, lay one deck 300g/m2 non-woven fabrics and one deck bamboo chip basketry, then manually push flyash filtrate; (2) network of drains construction: sewerage pipeline network is formed the vertical filtering layer pump well that plum blossom point is arranged is set in the vertical direction by pump well (brickwork construction), multi-stage pipeline, plastic drain-pipe and pump (submersible pump); (3) natural-dehydration: the mud that is deposited in mud field dewaters through natural air drying, and water filtration flows into pump well by water shoot, pump (submersible pump) is by water suction water treating pond; (4) water conditioning, discharge: the water in water treating pond is carried out to water conditioning, make it reach emission standard and discharge again backwater storehouse, lake, river course, irrigation canals and ditches etc. after up to standard.
In these methods, it is the most general that natural-dehydration method is used.Therefore we have designed stacked mud mummification method for the mud that is deposited in mud field, this is because sludge volume is huge during due to natural-dehydration, drainage is poor, the time that discharging consolidation needs under self gravitation effect is very long, if do not dealt carefully with, can take for a long time a large amount of soils and have environmental pollution hidden danger.
Three, summary of the invention
The problem that the present invention need to solve is:
Invent a kind of method that can be applied to the quickening mud mummification of big-and-middle-sized mud stack up yard.The stacked mud mummification of this silt stockyard method can large-area applications in mud stack up yard, and solidify for accelerating mud mummification the good effect of playing.
Technical scheme of the present invention:
The stacked mud mummification of silt stockyard of the present invention method, this is designed for big-and-middle-sized silt stockyard, for the mummification problem of a large amount of mud of silt stockyard, proposes new solution.Stacked structure is designed in the mud bottom of getting up in accumulation, and this design is followed successively by from top to bottom: cement is built grid (grid area 0.1m*0.1m-2m*2m), bamboo chip stratum reticulare, thick metalling.Sewage in mud is because first action of gravity sees through thick metalling (particle diameter is 2cm-4cm), then by bamboo chip stratum reticulare, flows on the grid that nethermost cement builds, and by inclined-plane, discharges.
Silt stockyard is designed to the domatic of 4 degree, and the reason of design is that the sewage of being convenient under infiltration can be discharged smoothly like this, and is focused on.Bottom one deck of stacked structure is the grid (grid area 0.1m*0.1m-2m*2m) that cement is built, be highly 0.5m, the reason of design is that bottom one deck structure is not only permeable like this, and to bear the weight that all structures above comprise mud, so need to select load ability strong, and firm on-deformable structure.With cement, build that square grid has not only strengthened load but also hollow grid is also wanted conservation than common solid cement structure.
Layer second from the bottom is bamboo chip net, the space of bamboo chip net is less than 2cm, take and guarantee that the rubble (particle diameter is 2cm-4cm) of metalling can not leak down, be stuck in bamboo chip net, the effect of bamboo chip net is to intercept metalling to drop to undermost cement and build in grid on the one hand, the water filtering function that guarantees metalling, on the other hand, further filters the composition from rubble metafiltration.Select bamboo chip to be not only because bamboo chip structure-bearing ability is stronger, and the ammonia nitrogen waste water that contains high density under oozing for mud have good resistance to corrosion.
The online face of bamboo chip is metalling, and Ballast Layer Height is 0.4m, in this layer of structure, be all particle diameter at the coarse crushing stone of 2cm-4cm, the effect of coarse crushing stone is that mud is carried out to preliminary filtration, makes waste water in mud can see through coarse crushing stone and filter in stepped construction below.That in stacked structure, can pile up 1-3m treats the mummification mud that wets.Effect of the present invention is:
Obtain a kind of novel mud drying method.The material of main part of this invention (rubble, bamboo chip, cement LIFT) is selected not only cheap durable but also have higher-strength, can bear the weight for the treatment of dry mud.Stacked mud mummification structure has fabulous effect for removing moisture in mud.Therefore this invention can be solidified engineering for the mud mummification of big-and-middle-sized silt stockyard provides a kind of new system of selection, can promote mud mummification Study on curing progress.
Four, accompanying drawing explanation
Fig. 1: the stacked mud mummification of silt stockyard method, 1-a: cement is built grid orthographic plan, 1-b: mud mummification place diagrammatic cross-section.Accompanying drawing is the longitudinal diagram that cement is built grid vertical view and stacked mud mummification method, in stacked mud mummification method, be followed successively by from top to bottom: 5, cement is built grid (grid area 0.1m*0.1m-2m*2m), 4, bamboo chip stratum reticulare, 3, thick metalling, 1, treat dry silt seam.Cement is built grid and is built on spend in cement stockyard 4 domatic, and the height that guarantees final all grids is 0.5m, and bamboo chip stratum reticulare is laid on cement and builds on grid, and the bamboo chip net setting of selecting space to be less than 2cm forms.Coarse crushing stone layer thickness is 0.4m, in this layer of structure, be all particle diameter at the coarse crushing stone of 2cm-4cm, what 1-3m can pile up in the stacked structure the superiors treats the mummification mud that wets.
five, embodiment
In stacked mud mummification method, construction is from top to bottom followed successively by: cement is built grid (grid area 0.5m*0.5m), bamboo chip stratum reticulare, and thick metalling, treats dry silt seam.Cement is built grid and is built on spend in cement stockyard 4 domatic, and the height that guarantees final all grids is 0.5m, and bamboo chip stratum reticulare is laid on cement and builds on grid, and the bamboo chip net setting of selecting space to be less than 2cm forms.Coarse crushing stone layer thickness is 0.4m, in this layer of structure, be all particle diameter at the coarse crushing stone of 2cm-4cm, what 1-3m can pile up in the stacked structure the superiors treats the mummification mud that wets.Drying time is about 2-5 days, is determined on a case-by-case basis.

Claims (2)

1. a novel mud drying method.This invention is mainly used in big-and-middle-sized silt stockyard, for the mummification problem of a large amount of mud of silt stockyard, proposes new solution.This design is followed successively by from top to bottom: the grid supporting layer that cement is built (grid area 0.1m*0.1m-2m*2m), bamboo chip stratum reticulare, thick metalling, mud accumulation horizon.
2. the sewage in mud first sees through thick metalling, and through bamboo chip stratum reticulare, the grid supporting layer of building through cement, finally flow on the inclined-plane of 4 degree, drains into Sewage treatment systems, thereby reaches the object of mud mummification.
CN201210251005.2A 2012-07-16 2012-07-16 Stacked sludge drying method for sludge storage yards Pending CN103539330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210251005.2A CN103539330A (en) 2012-07-16 2012-07-16 Stacked sludge drying method for sludge storage yards

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Application Number Priority Date Filing Date Title
CN201210251005.2A CN103539330A (en) 2012-07-16 2012-07-16 Stacked sludge drying method for sludge storage yards

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CN103539330A true CN103539330A (en) 2014-01-29

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019636A (en) * 2014-06-03 2014-09-03 李明华 Dehydration method for potato residues
CN105149316A (en) * 2015-07-03 2015-12-16 浙江理工大学 Stacking and capacity increasing method for landfill by building storage cavern through solidified municipal sludge
CN106400826A (en) * 2016-08-29 2017-02-15 娄晓曼 Drainage device for river and lake dredging and reclamation soil yards with high content of organic matters

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201254514Y (en) * 2008-05-08 2009-06-10 贵阳铝镁设计研究院 Novel sludge anhydration field

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201254514Y (en) * 2008-05-08 2009-06-10 贵阳铝镁设计研究院 Novel sludge anhydration field

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019636A (en) * 2014-06-03 2014-09-03 李明华 Dehydration method for potato residues
CN105149316A (en) * 2015-07-03 2015-12-16 浙江理工大学 Stacking and capacity increasing method for landfill by building storage cavern through solidified municipal sludge
CN105149316B (en) * 2015-07-03 2016-05-18 浙江理工大学 The curing municipal sludge of a kind of use builds the landfill yard of bank and piles high compatibilizing method
CN106400826A (en) * 2016-08-29 2017-02-15 娄晓曼 Drainage device for river and lake dredging and reclamation soil yards with high content of organic matters

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Application publication date: 20140129