CN106587566A - Treating method for high organic matter bottom mud and application of water solution of high organic matter bottom mud - Google Patents

Treating method for high organic matter bottom mud and application of water solution of high organic matter bottom mud Download PDF

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Publication number
CN106587566A
CN106587566A CN201611156434.6A CN201611156434A CN106587566A CN 106587566 A CN106587566 A CN 106587566A CN 201611156434 A CN201611156434 A CN 201611156434A CN 106587566 A CN106587566 A CN 106587566A
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bed mud
dredged
high organic
bottom mud
pipe
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焦阳
何稼
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Hohai University HHU
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Hohai University HHU
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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
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05FORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F11/00Other organic fertilisers
    • C05F11/02Other organic fertilisers from peat, brown coal, and similar vegetable deposits
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05FORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G1/00Mixtures of fertilisers belonging individually to different subclasses of C05
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80Soil conditioners
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

Abstract

The invention discloses a treating method for high organic matter bottom mud and application of a water solution of the high organic matter bottom mud. The treating method includes the following steps that (1) the high organic matter bottom mud is dredged to be conveyed to a first pipe containing a static mixer and a second pipe containing a static mixer; (2) a strong alkali solution is put into the first pipe, and the strong alkali solution and the dredged bottom mud are fully subjected to a contact reaction through the static mixer; (3) the dredged bottom mud continues to be conveyed to the second pipe, a flocculating agent solution is put into the second pipe, and the flocculating agent solution and the dredged bottom mud are fully reacted in the pipe through the static mixer; (4) the dredged bottom mud obtained after being reacted in the step (3) is conveyed to soilbag braided fabrics for dehydration volume reduction. The treating amount of the dredged bottom mud with the method is large, the occupied area of a site is small, the technology is simple, and the inhibiting effect of organic matter on dredged mud solidification is effectively inhibited; according to the application, compound fertilizer is processed by recycling the water solution containing humic acid, and the resource utilization rate is increased.

Description

A kind of processing method of high organic bed mud and its application of aqueous solution
Technical field
The present invention relates to process the process of bed mud in ocean, rivers, water channel, and in particular to the process side of high organic bed mud The application of the aqueous solution that volume reduction is obtained is dehydrated in method and its process.
Technical background
The process of current Dredged bed mud is a global difficult problem.All have one in ocean, lake, the Dredged bed mud in river course Fixed organic matter, according to statistics (article numbering 1000-7598- (2008) 01-0033-04), zones of different, different year in Taihu Lake Bed mud content of organic matter Change in Mean scope is 0.68%~1.9%, and peak can reach more than 10%, in sediment of West Lake, Hangzhou The content of organic matter is extremely high, and the average content of zones of different reaches 20%, organic matter in Beijing Kunming Lake and Dianchi Lake, Yunnan Province bed mud Content range is respectively 0.3%~6% and 2%~9% etc..It is a kind of effectively money to process Dredged bed mud using curing Source regeneration method.To finding in the research of solidification technology, the presence of organic matter can be greatly reduced prior art The effect of the cured of bed mud.Inevitable problem is treated as in current engineering construction to high organic bed mud.With This simultaneously, humic acidss are the important component parts of dredged mud grain structure.Humic acidss are main from peat, brown coal, weathered coal at present Extract in.Relative to commodity humic acidss, the organism kinds that dredged mud humic acidss contain are more, lipoid material and nitrification Thing content is higher, and oxidizability is lower, but both growth-promoting effects to plant do not have notable difference.Extract from dredged mud rotten Phytic acid, for producing composite chemical fertilizer, not only can save the non-renewable resources such as coal, and can improve sludge manure product Matter, expands dredged mud resource product market.This method is molten using method is solved at alkali while volume reduction is dehydrated using soil engineering bag The humic acidss gone out in dredged mud, the extraction with aqueous solution and concentration to abjection is provided newly to dredge clay fat existing recycling Approach.
There are many patented technologies to can be used to process the high organic mud in ocean, rivers, water channel in the world at present, The domestic method for adopting main at present has chemistry to wash the methods such as pouring, high temperature thermal desorption, but mostly operating cost is high, and fail it is right Dredged bed mud is processed further processing.Forefathers have been proposed for some new processing methods, such as patent publication No. CN102583950A propose a kind of portable polluted bed mud pipe racks dehydration volume reduction administering method, although the method to dredged mud at Reason amount is big, and occupied ground area is little, and process is simple, economic benefit is good.But dehydrating and curing is not produced in view of organic matter Raw inhibitory action, and without secondary utilization can be played to the utility humic acidss in dredged mud, it is difficult to reach higher Economic benefit.The method that patent publication No. CN101693590B proposes a heavy metal sludge handling, by heavy metal chelant and Flocculant geotechnique's bag technique all Dredged bed muds that combines are processed, and while volume reduction is dehydrated heavy metal secondary pollution is solved Problem, but the method need substantial amounts of place and be suitable for the method situation it is more special, the suitability is little.Again strictly according to the facts A kind of dredging reamer head device of reduction sediment diffusion is disclosed with new patent 200520044977.X, it is defeated by sealing pipeline Send dredged mud to solve the problems, such as secondary pollution, but high-load organic matter in dredged mud is not further processed.To sum up institute State, some patented technologies mentioned before yet suffer from weak point, have larger skill in the process to high organic bed mud Art vacuum.Instantly it is badly in need of a kind of processing method of high organic bed mud, not only can guarantee that Sediment Dredging and be dehydrated the efficient of volume reduction Rate is carried out, and reduces the inhibitory action of organic matter, additionally it is possible to carry out economic utilization to humic acidss, is met dredged mud and is processed side-product The market demand.
The content of the invention:
Goal of the invention:For problems of the prior art, the present invention provides a kind of process side of high organic bed mud Method, the method is big to the treating capacity of Dredged bed mud, and place area occupied is little, process is simple, and effectively inhibits organic matter pair The inhibitory action of dredged mud consolidation.Present invention also offers being dehydrated the aqueous solution that volume reduction is obtained in the process of high organic bed mud Using.
Technical scheme:To achieve these goals, a kind of processing method of high organic bed mud as described in the present invention, bag Include following steps:
(1) by high organic bed mud in ocean, rivers or water channel, it is transported to after dredging containing static mixer In first pipeline and second pipe, the first pipeline and second pipe are connected with each other;
(2) when Dredged bed mud is transported to the first pipeline, strong alkali solution is thrown in in the first pipeline, by static mixer It is allowed to be fully contacted reaction with Dredged bed mud;
(3) continue for Dredged bed mud to be transported to second pipe, in second pipe flocculant solution is thrown in, by static mixed Clutch makes flocculant solution fully react in the duct with Dredged bed mud;
(4) reacted Dredged bed mud in step (3) is transported in soil engineering bag fabric carries out dehydration volume reduction, treats geotechnique After bag is full of rear natural-dehydration consolidation, place is transported to, the Dredged bed mud after dehydration volume reduction is carried out into recycling, as Reclaiming land around sea, improvement farmland or garden soil are used.
Wherein, the first pipeline and second pipe in the step (1) is sealing pipeline, and is tightly connected.
The main component of described organic matter is humic acidss.
Bed mud moisture content after the dredging is 100% ± 5%.
The dredging mode is to be carried out by dredger or slush pump.Dredged bed mud is conveyed by dredger or slush pump When, adopt the optimal way of dredger to twist suction environmental dredging ship, the optimal way of slush pump is adopted for double-acting type mud Stock pump.
Wherein, step (2) strong alkali solution is NaOH solution or KOH solution, concentration be 0.15mol/L~ 0.2mol/L, adds 0.065mol-0.075molNaOH or KOH to calculate by every cubic metre of Dredged bed mud;And by static state Blender causes strong alkali solution solution to be fully contacted more than 5min with Dredged bed mud, and highly basic has the effect for cracking bed mud, Jing The dredged mud of alkali process, the content of organic matter declines, and the inhibitory action of dewatering and coagulating is substantially weakened.
Wherein, step (3) flocculant is selected from PAMC, PAMA and nonionic One or more in polyacrylamide;Flocculant has the effect of Accelerated subsidence excellent, elects non-ionic polyacrylamide, effect as Good, cheap and nontoxic, its input ratio is with .5 ‰~3 ‰ of the dry mass of Dredged bed mud.
Wherein, step (4) the soil engineering bag fabric be by polypropylene or poly- second propylene resin for the monofilament of raw material or Split yarn or monofilament-split yarn combination carry out braiding and form.Preferably a width of 1.5 meters of the soil engineering bag fabric of actually used design, A length of 2.5 meters.
Step (4) soil engineering bag is to cause within 3-50 days the moisture content of Dredged bed mud low full of rear natural-dehydration consolidation time In 60%, after right dewatering and coagulating the bed mud after process is transported to job site using portable car body, entered by national standard Row is processed to be disposed or recycling.
Ensure that Dredged bed mud will not in pumping procedure under the conveying of sealing pipeline by environmental dredging ship or slush pump Secondary pollution is caused to external world;By the way that a certain proportion of strong alkali solution is added in the first pipeline so that the organic matter in bed mud Dissolution, reduces the inhibitory action that organic matter is consolidated to bed mud;Combined by soil engineering bag fabric and flocculant and substantially strengthen The effect of dehydration volume reduction, and produced machinery input and operation cost during dehydration compatibility in the past are saved in the process.
The aqueous solution that dehydration volume reduction is obtained in the processing method of high organic bed mud of the present invention is multiple in processing Application in combination fertilizer.
Aqueous solution during the dehydration volume reduction to deviating from is reclaimed, and the aqueous solution processing for obtaining is condensed into humic acidss concentration Liquid, reprocessing production composite chemical fertilizer.The utilization of resources is improve by reclaiming containing organic matter aqueous acid processing composite chemical fertilizer Rate, cuts operating costs.
Beneficial effect:Compared with prior art, the invention has the advantages that:
1st, the organic matter bed mud processing method of the invention is suitable for processing ocean, lake, river course, by environmental dredging On the basis of conveying with sealing the further place of Dredged bed mud is tied alkali process and flocculant soil engineering bag technique using chemical agent Close, the secondary pollution to environment is reduced in course of conveying, big to the treating capacity of Dredged bed mud in work progress, place takes Area is little, input and operation cost are low;And process is simple, the inhibitory action for effectively inhibiting organic matter to consolidate dredged mud. Dredged bed mud moisture content after this method process is low, can carry out processing disposal or recycling resource utilization by national standard Height, high financial profit.
2nd, the static mixer used in processing procedure replaces general mixing machinery, is reaching the same of preferable mixed effect When, the input of plant equipment is reduced, reduce operation cost.
3rd, resource utilization is improve by reclaiming the processing composite chemical fertilizer of the solution containing humic acidss, expands economic benefit, Cut operating costs, the market demand for meeting dredged mud process side-product cuts operating costs, and has reached the effect killed two birds with one stone.
Description of the drawings
Fig. 1 is the schematic flow sheet of the processing method of high organic bed mud of the present invention;
Fig. 2 is the schematic flow sheet of the application that aqueous solution is reclaimed after high organic bottom-mud dewatering volume reduction of the present invention.
Specific embodiment
With reference to embodiments the invention will be further described with accompanying drawing.
Embodiment 1
The processing method of high organic bed mud:
(1) by high organic bed mud in the surrounding sea areas of Lianyun Harbour, it is transported to after the ship dredging of strand suction environmental dredging In first pipeline and second pipe of the sealing being connected with each other containing static mixer, the moisture content of Dredged bed mud is 98%, Dredging flow is 250m3/h;
(2) when Dredged bed mud is transported to the first pipeline, 0.15mol/LNaOH solution is thrown in in the first pipeline, by meter Amount pump control addition, every cubic metre of Dredged bed mud adds 0.065molNaOH, it is seasonable between 15min, made by static mixer Be fully contacted reaction with Dredged bed mud;
(3) continue for Dredged bed mud to be transported to second pipe, flocculant cation polypropylene acyl is thrown in in second pipe Amine aqueous solution, by dosing pump flocculant throws in the dry mass that ratio is Dredged bed mud 0.5 ‰ are controlled, and are made by static mixer Flocculant solution fully reacts in the duct with Dredged bed mud, and the response time, in 20min, forms big floc sedimentation, Accelerated subsidence;
(4) reacted Dredged bed mud in step (3) is transported in soil engineering bag fabric carries out dehydration volume reduction, soil engineering bag Fabric is that the monofilament braiding by polypropylene-based resin for raw material is formed, a width of 1.5 meters, a length of 2.5 meters, after soil engineering bag is full of Natural-dehydration consolidation after 3 days so that the moisture content of bed mud be 56%, using portable car body by the bed mud after process transport to The job site of reclaiming land around sea, does reclaiming land around sea and is used;Its flow process is as shown in Figure 1.
Embodiment 2
The processing method of high organic bed mud:
(1) by high organic bed mud in the lake of Baima, it is transported to after double-acting type slush pump is dredged containing static mixed In first pipeline and second pipe of the sealing being connected with each other of clutch, the moisture content of Dredged bed mud is 105%, and dredging flow is 250m3/h;
(2) when Dredged bed mud is transported to the first pipeline, 0.2mol/LKOH solution is thrown in in the first pipeline, by metering Pump controls addition, and every cubic metre of Dredged bed mud is added 0.070molKOH, response time 10min, is allowed to by static mixer Reaction is fully contacted with Dredged bed mud;
(3) continue for Dredged bed mud to be transported to second pipe, flocculant anion pp acyl is thrown in in second pipe Amine aqueous solution, by dosing pump flocculant throws in the dry mass that ratio is Dredged bed mud 3 ‰ are controlled, and by static mixer wadding is made Solidifying agent solution fully reacts in the duct with Dredged bed mud, and the response time, in 15min, forms big floc sedimentation, Accelerated subsidence;
(4) reacted Dredged bed mud in step (3) is transported in soil engineering bag fabric carries out dehydration volume reduction, soil engineering bag Fabric is that the split yarn braiding by poly- second propylene resin for raw material is formed, and a width of 1.5 meters, a length of 2.5 meters, treats that soil engineering bag fills After full 50 days after natural-dehydration consolidation so that the moisture content of bed mud is 20%, using portable car body by the bed mud after process Transport into farmland, be used as farmland soil modifying.
Embodiment 3
The processing method of high organic bed mud:
(1) by high organic bed mud in the surrounding city water channel of Nanjing, it is transported to after double-acting type slush pump is dredged In first pipeline and second pipe of the sealing being connected with each other containing static mixer, the moisture content of Dredged bed mud is 95%, Dredging flow is 250m3/h;
(2) when Dredged bed mud is transported to the first pipeline, 0.18mol/L NaOH solutions are thrown in in the first pipeline, by meter Amount pump control addition, by every cubic metre of Dredged bed mud 0.075moNaOH, response time 20min, by static mixer are added It is allowed to be fully contacted reaction with Dredged bed mud;
(3) continue for Dredged bed mud to be transported to second pipe, flocculant nonionic polyacrylamide is thrown in in second pipe Amine aqueous solution, controls flocculant throws in the dry mass ratio that ratio is Dredged bed mud 1.5 ‰, by static mixer by dosing pump Flocculant solution is set fully to react in the duct with Dredged bed mud, the response time, in 25min, forms big floc sedimentation, Accelerated subsidence;
(4) reacted Dredged bed mud in step (3) is transported in soil engineering bag fabric carries out dehydration volume reduction, soil engineering bag Fabric is that the monofilament-split yarn combined knitting by poly- second propylene resin for raw material is formed, a width of 1.5 meters, a length of 2.5 meters, After soil engineering bag is full of 30 days after natural-dehydration consolidation so that the moisture content of bed mud is 40%, will be processed using portable car body Later bed mud is transported to place, and the improved soil for doing afforestation is used.
Embodiment 4
The water that will be produced during Dredged bed mud dehydration volume reduction in any one step (4) soil engineering bag fabric in embodiment 1 to 3 Solution is reclaimed, and adds the NaOH solution of 0.2mol/L, is slowly stirred centrifugation after 24 hours, goes the supernatant as corruption Phytic acid dissolution fluid sample, will go out liquid and concentrates 20 times of further processed afterwards, and humic acidss are used as a kind of macromole organic matter, and its is dense Contracting liquid can not only can save the non-renewable resources such as coal as the raw materials for production of various compound fertilizers, and can improve Bed mud fertilizer quality, expands bed mud resource product market.Composite chemical fertilizer is processed by reclaiming containing organic matter aqueous acid Resource utilization is improve, is cut operating costs;Its flow process is as shown in Figure 2.

Claims (10)

1. a kind of processing method of high organic bed mud, it is characterised in that comprise the steps:
(1) by high organic bed mud, it is transported to after dredging in the first pipeline and second pipe containing static mixer, First pipeline and second pipe are connected with each other;
(2) when Dredged bed mud is transported to the first pipeline, strong alkali solution is thrown in in the first pipeline, is allowed to by static mixer Reaction is fully contacted with Dredged bed mud;
(3) continue for Dredged bed mud to be transported to second pipe, flocculant solution is thrown in in second pipe, by static mixer Flocculant solution is set fully to react in the duct with Dredged bed mud;
(4) reacted Dredged bed mud in step (3) is transported in soil engineering bag fabric carries out dehydration volume reduction, treats that soil engineering bag fills After full after natural-dehydration consolidation, place is transported to, is carried out recycling.
2. according to power require 1 described in a kind of high organic bed mud processing method, it is characterised in that having described in step (1) The main component of machine matter is humic acidss.
3. according to power require 1 described in a kind of high organic bed mud processing method, it is characterised in that step (1) dredging Bed mud moisture content afterwards is 100% ± 5%.
4. according to power require 1 described in a kind of high organic bed mud processing method, it is characterised in that step (1) dredging Mode is to be carried out by dredger or slush pump.
5. according to power require 1 described in a kind of high organic bed mud processing method, it is characterised in that step (2) highly basic Property solution be NaOH solution or KOH solution, concentration is 0.15mol/L~0.2mol/L.
6. according to power require 1 described in a kind of high organic bed mud processing method, it is characterised in that step (3) flocculation One or more of agent in PAMC, PAMA and non-ionic polyacrylamide.
7. according to power require 1 described in a kind of high organic bed mud processing method, it is characterised in that step (4) geotechnique Bag fabric is that monofilament or split yarn or monofilament-split yarn by polypropylene or poly- second propylene resin for raw material are combined and compiled Knit and form.
8. according to power require 1 described in a kind of high organic bed mud processing method, it is characterised in that step (4) geotechnique Bag is 3~50 days full of rear natural-dehydration consolidation time so that the moisture content of Dredged bed mud is less than 60%.
9. the aqueous solution that dehydration volume reduction is obtained in the processing method of the high organic bed mud described in claim 1 is multiple in processing Application in combination fertilizer.
10. the application according to power requires 9, it is characterised in that the aqueous solution during dehydration volume reduction to deviating from is reclaimed, The aqueous solution processing for obtaining is condensed into humic acidss concentrated solution, reprocessing production composite chemical fertilizer.
CN201611156434.6A 2016-12-14 2016-12-14 Treating method for high organic matter bottom mud and application of water solution of high organic matter bottom mud Pending CN106587566A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113501637A (en) * 2021-08-03 2021-10-15 中国水利水电第六工程局有限公司 Low-organic-matter bottom mud repairing agent and application method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101037287A (en) * 2007-03-05 2007-09-19 清华大学 Method of resource protection, decrement treatment of town sewage and sludge
CN101693590A (en) * 2009-10-12 2010-04-14 天津生态城环保有限公司 Heavy metal polluted sludge treatment method
CN102583950A (en) * 2012-02-21 2012-07-18 天津生态城环保有限公司 Mobile contaminated bottom mud bag pocket dewatering and volume reduction treatment method
KR101234432B1 (en) * 2012-07-06 2013-02-18 현대아산 주식회사 Method for processing dredged

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101037287A (en) * 2007-03-05 2007-09-19 清华大学 Method of resource protection, decrement treatment of town sewage and sludge
CN101693590A (en) * 2009-10-12 2010-04-14 天津生态城环保有限公司 Heavy metal polluted sludge treatment method
CN102583950A (en) * 2012-02-21 2012-07-18 天津生态城环保有限公司 Mobile contaminated bottom mud bag pocket dewatering and volume reduction treatment method
KR101234432B1 (en) * 2012-07-06 2013-02-18 현대아산 주식회사 Method for processing dredged

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113501637A (en) * 2021-08-03 2021-10-15 中国水利水电第六工程局有限公司 Low-organic-matter bottom mud repairing agent and application method thereof

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Application publication date: 20170426