CN102260032B - Sludge treatment method - Google Patents
Sludge treatment method Download PDFInfo
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- CN102260032B CN102260032B CN 201010189546 CN201010189546A CN102260032B CN 102260032 B CN102260032 B CN 102260032B CN 201010189546 CN201010189546 CN 201010189546 CN 201010189546 A CN201010189546 A CN 201010189546A CN 102260032 B CN102260032 B CN 102260032B
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Abstract
The invention discloses a sludge treatment method, which comprises the following steps of: (1) conveying sludge to a sand-water separator; (2) performing filtering separation on the sludge which flows into a garbage separation device; (3) introducing the sludge discharged from the two sides of the garbage separation device into a first stirring tank added with a medicament; (4) stirring the sludge in the stirring tank, introducing into a concentration device, performing solid-liquid separation, discharging filtrate, and adding the concentrated sludge into a sludge storage tank; (5) pumping the concentrated sludge into a second stirring tank added with a medicament; and (6) pumping the sludge which enters the second stirring tank into a dehydrating device, dehydrating, discharging press water, and pressing the sludge into a sludge cake. By the sludge treatment method, treated discharge water meets the secondary discharge standard in 'Integrated Wastewater Discharge Standard' (GB8978-1996), dehydrating efficiency is high, and the water content of the dehydrated sludge is 35 to 55 percent.
Description
Technical field
The present invention relates to a kind of process for treating sludge.
Background technology
The contaminated urban waterway of the Delta of the Pearl River, owing to being subjected to tidal the impact, the river is gushed and is belonged to unhurried current, the water body of going around, and after pollutent entered water body, easily precipitation caused the permanent pollution of bed mud; The continuous alluvial of bed mud has not only weakened the function of controlling flood and draining flooded fields in river course, also becomes the endogenous pollution of water body.The project research purpose is to guarantee on the basis of flood control safety, and black smelly river course is carried out the comprehensive regulation, makes it progressively to recover self-purification capacity and ecological functions.The Zhujiang River is most important water source, Guangdong Province, is undertaking 13 regions comprising the Delta of the Pearl River with listing and Hong Kong, the tens million of residents' in the Macao Special Administrative Region life, production water supply and shipping task.In the basin GDP account for the whole province 90%, the whole nation 10%; Wherein the Pearl River Delta economic total volume has just accounted for more than 85% of the whole province.Economical in the basin have very important critical role at our province and the whole nation, and the Pearl River Delta is the most important thing.Sustainable utilization and the water surrounding of Pearl River Delta water resources (being mainly the Zhujiang River) are effectively protected; the prosperity and stability that is related to Guangdong Province and Hong Kong, Macao; be related to socioeconomic Sustainable development in the zone, more be related to the area, Pearl River Delta in the whole nation and even worldwide synthesized competitiveness.The regulation Zhujiang River, promoting zone, delta environmental quality, is Guangdong Province's socialist modernization that takes the lead in substantially realizing, the Implement of sustainable development strategy, build a harmonious society in the urgent need to objective requirement.The Pearl River Delta is China and even global production important city, ignores water environment protection in one's early years, adopts the extensive style economic model, causes that in the zone, surface water quality sharply worsened in nearly 30 years.In the zone, urban waterway is more than 1,000, almost all has been subject to pollution in various degree.The characteristics that gush in Delta of the Pearl River river: (1) most of river water burst body is subjected to the mouth of the Zhujiang River tidal effect, reverberates up and down, and pollutent circulation drainage difficulty in water body does not almost have the reoxygenation ability of nature; (2) because tidal river surge belongs to unhurried current, the water body of going around, after pollutent entered water body, if can not in time cut down, easily precipitation caused the permanent pollution of bed mud; (3) enter the pollutent long-term accumulation of gushing in the river, form sediment pollution, not only silt the river course up, impact is controlled flood and drained flooded fields, and also affects water quality along with the pollutants in sediments Transport And Transformation; (4) fracture morphology, structure manually linearize, channelization and " three light " are gushed in the river in many cities, there is no water Conservation and ecological functions.Although dropped into a large amount of manpower and materials, and the Zhujiang River water quality of key section also obtained larger improvement, fundamental shifts do not occur in Pearl River Delta Zhujiang River water quality.At present, the contaminant rivers regulation effect is poor has many-sided reason to consist of, as lacks rational moisturizing and effectively running water circulation.But wherein the reason of more important more deep layer is relevant with river bottom mud: (1) river course is through for many years pollution accumulation, and endogenous sediment pollution substrate concentration is high, and amount of sludge is large, the treatment technology of mud disappearance after desilting, dispose hopelessly, desilting is not thorough, and the desilting engineering is difficult to carry out on a large scale.(2) gush the diversity of improvement technology due to the river, to the integrated deficiency of economical and practical technology, the improvement technology is copied slavishly, and the natural ecosystem of rivers reparation that has becomes a mere formality, and only pays attention to external view and improves, and does not pay attention to that ecological principle is used and technology is integrated.(3) also having a considerable reason, is namely that the release of river bottom mud is polluted.River bottom mud is the important component part of water body, in river-bed mud system, bed mud is the more stable place of various pollutant accumulation enrichments, bed mud is the ground that collects of various pollutents, again water quality to be had the secondary pollution source of potential impact, when envrionment conditions changed, the pollutent that is strapped in wherein can be released, and causes secondary pollution.In the time of 2-3 times in the high water-outlet body of concentration of pollutent in bed mud, namely thinking has potential hazard to the mankind and aquatic ecosystem.Even improved Water quality by variety of way, the pollutent that bed mud discharges is polluted-water again, and improvement is before made great efforts all that has been achieved is spoiled.At this moment, need to consider the river course is dredged.Therefore, enrichment the bed mud of Historical Pollution thing whether obtain removing be to affect the important factor that water surrounding is repaired comprehensively.This shows, the dredging of river bottom mud is necessary.It not only has active effect for promoting river course shipping and flood carrying capacity, and can reduce the risk of river bottom mud secondary pollution, thereby the improvement that is comparatively thoroughly river water body is removed trouble and worry with reparation, promote feasibility and the validity of the river course comprehensive regulation, and can long term maintenance regulation effect preferably.The dredging of river bottom mud with the contaminant exclusion of long-term settlement accumulation outside water body, but the whereabouts problem of these pollutents is equally very important, this main manifestations is dredging sludge handling disposal process.Discarded dredging bed mud easily causes secondary pollution because comprising the pollutent of a large amount of enrichments, has become a kind of novel source of pollution at present.
In addition, harbour, area, Pearl River Delta, navigation channel, Ocean and coastal engineering construction develop rapidly, and the dredging mud of ocean also produces in a large number, and the annual dredging bed mud that produces will reach approximately 8,000 ten thousand m
3The left and right.Will produce a large amount of dredging bed mud in water conservancy, oceanographic engineering the coming years, these mud contaminated serious, quantity is large, how effectively mud thoroughly to be removed, decrement and reasonably utilizing, be also anxious to be resolved be problem.In traditional bottom-mud dewatering treating processes, as naturally stacking mummification, there is huge secondary pollution hidden danger in the realistic meaning of the close-coupled processing technology of river bottom mud, and surrounding enviroment are produced higher threat, and gained environmental benefit and economic benefit are lower.Therefore, Sediment Dredging must be with the future development towards integrated, integrated, scene, serialization, automatization with processing.The particular content of close-coupled processing technology is, river bottom mud dredging, bed mud is concentrated, bed mud conditioning, these important steps of bottom-mud dewatering are integrated in dredging on-the-spot bank (or from operation field closer distance) place's floor space little work area, by integrated and field apparatus serialization, realize concentrating, nurse one's health and dehydration of mud, the mud cake that the output water ratio reduces greatly, thus realize that comparatively desirable bed mud subtracts appearanceization.Mud cake is transported outward and is disposed.The advantage of on-the-spot integrated dredging sludge handling technique is obvious: be at first to have shortened the bed mud fed distance, thereby saved a large amount of trucking costs, reduce from the side the risk of secondary pollution in the transportation, due to the placement place that does not need for transfer, thereby greatly reduced floor space.This equipment can be applied to the site disposal of lake dredging bottom-mud in the city, the narrow and small or surrounding in technology workyard is for living and commerce area.Deduct the link that transfer is put, reduced the possibility of the secondary pollutions such as effluent seepage and stench.In city river dredging sludge handling, engineering construction can be dropped to minimumly to the detrimentally affect of view, life production environment on every side, embodied social benefit preferably.Rapidly and efficiently, dewatering efficiency is very high, subtracts appearance effective, and after dehydration, moisture content of the cake can be low to moderate 50-60%, and the mud cake after processing can carry out follow-up disposal to it quite easily because water ratio is low.Simultaneously by adding composite conditioner, can make that in mud cake, hazardous and noxious substances content is in safety range, can directly be used for gardens as soil improvement agent and cultivate, or be used for other recycling modes such as building material preparation.Even landfill is disposed, also can greatly reduce traffic capacity and landfill land use amount.In view of above advantage, bottom-mud dewatering is processed the environment and economy benefit that integration apparatus has higher and balance, can effectively solve the problem of outlet of pollutent in bed mud, for more effective, more reasonably administer water body environment and solve trouble and worry, give full play to good social benefit.Ecological restoration technology on river and Sediment Dredging general introduction, the polluted riverway ecosystem rehabilitation technology comprises: (1) river course water cycle is rebuild; To pass through lock pump combined dispatching technology at tidal river reach, namely utilize tide dynamic force, and adopt pumping plant to increase water power, make water body form uniflux.(2) the ecological dredging of the removal of river course endogenous pollution-bed mud, desilting, dehydration technique (3) river channel ecology revetment reconstruction and Morphology Remodeling and recovery technique.(4) microbial film catalytic oxidation technology, plant technology, the biology in the river course controlled the lasting purification techniquess of original position such as technology.It is ripe that these technology have, and waiting of having broken through.Wherein Sediment Dredging has been considered to one of a kind of important means of effectively administering sediment pollution.The sediment pollution of continent, Pearl River Delta river course long-term accumulation, the desilting amount is large, and maximum problem is that the bed mud that clears out is bulky, if can not effectively dewater and make it resource utilization, it is disposed and problem of outlet will make dredging measure implement, and the R﹠D work of strengthening dewatering machine is very necessary.The reparation of bed mud mainly relies on physical method to carry out dredging operation.In the time of 2-3 times in the high water-outlet body of concentration of pollutent in bed mud, namely thinking has potential hazard to water surrounding and the activity of mankind's related production, will consider to dredge.Domestic the most frequently used dredging silt remover pattern mainly contains grab type, chain-bucket, backhoe type, rake suction and strand suction etc. at present.The dredging method that generally adopts mainly contains " grab bucket is dredged+natural mummification " and " strand is inhaled and dredged+cofferdam nature mummification " two kinds of traditional ways, engineering construction is extensive, processing efficiency is low, take a large amount of land resourcess, and cause and overflow the comparatively serious secondary pollution such as waste water, stench, soil is caused irreversible pollution.Developed country generally adopts " strand inhale dredge+mechanical dehydration " mode, land occupation resource not, and the secondary pollution risk is little, and processing efficiency is high, and comprehensive cost is low.Developed village difficult to understand formula bed mud continuously dehydrating system as Japan, adopted shaft type water extracter and strand suction ship to be connected mutually and carried out continuous desilting dewatering operation.Germany Bellmer company is in the first place in the world on technique, the mechanize desilting in river course is dewatered the practical engineering experience of more than 30 year, decrement mode that employing strand suction ship is dredged and belt mud dewatering equipment dewaters.But because domestic desilting amount is large, the unit time amount of dredging of dredging plant is large, and execution conditions are abominable, and at present external state-of-the-art equipment there is no the competent such operating mode of method, and domestic so far also do not have this type of efficient Reduction Technology of widespread use.After the sludge dewatering decrement, be convenient to transportation, can greatly reduce traffic capacity and ultimate disposal land used, and be conducive to follow-up disposal of resources.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide the discharge water after a kind of process to meet " integrated wastewater discharge standard " secondary discharge standard (GB8978-1996), the water ratio after the high and dehydration of dewatering efficiency is the process for treating sludge of 35%-55%.
For achieving the above object, the technical solution adopted in the present invention is: a kind of process for treating sludge is characterized in that the step of the method is as follows:
(1) mud is transported to the sand water separator, wherein the part silt particle is up carried and discharges, and part mud is past dirty, and flows in device for separation of waste;
(2) the mud process that flows in device for separation of waste is filtered, and diameter is up carried and discharges greater than the rubbish of 3mm, and the mud after filtration is discharged from the both sides of rubbish separating machine;
(3) the mud input from the both sides discharge of rubbish separating machine is added with the first agitated pool of medicament;
(4) mud after entering agitated pool and stirring is pumped to and carries out solid-liquid separation in concentrating unit, and the filtrate of solid-liquid separation is discharged, and the mud after concentrated enters in storage mud groove;
(5) mud after concentrated is pumped in the second agitated pool that is added with medicament;
(6) mud that enters the second agitated pool is pumped in dewatering unit and dewaters, and after dehydration, press filtration water is discharged, and mud is pressed into mud cake.
More excellent, in described step 2, mud is isolated diameter and is up carried and discharge for landfill greater than the rubbish of 3mm
More excellent, the mud cake in described step 6 after dehydration can be used for recycling.
After adopting technique scheme, due to stirring, the concentrated and dehydration of having passed through rubbish separation, secondary stirring pond, discharge water after having realized processing meets " integrated wastewater discharge standard " secondary discharge standard (GB8978-1996), and the water ratio after the high and dehydration of dewatering efficiency is 35%-55%.
Description of drawings
Fig. 1 is overall flow figure of the present invention;
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of process for treating sludge, the step of the method is as follows: (1) is transported to the sand water separator with mud, and wherein the part silt particle is up carried and discharges, and part mud is past dirty, and flows in device for separation of waste; (2) the mud process that flows in device for separation of waste is filtered, and diameter is up carried and discharges greater than the rubbish of 3mm, and the mud after filtration is discharged from the both sides of rubbish separating machine; (3) the mud input from the both sides discharge of rubbish separating machine is added with the first agitated pool of medicament; (4) mud after entering agitated pool and stirring is pumped to and carries out solid-liquid separation in concentrating unit, and the filtrate of solid-liquid separation is discharged, and the mud after concentrated enters in storage mud groove; (5) mud after concentrated is pumped in the second agitated pool that is added with medicament; (6) mud that enters the second agitated pool is pumped in dewatering unit and dewaters, after dehydration, press filtration water is discharged, mud is pressed into mud cake, and in step 2, mud is isolated diameter and up carried and discharge for landfill greater than the rubbish of 3mm, and the mud cake in step 6 after dehydration can be used for recycling.
Above-described is only the preferred implementation of process for treating sludge of the present invention; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design; can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (3)
1. process for treating sludge is characterized in that the step of the method is as follows:
(1) mud is transported to the sand water separator, wherein the part silt particle is up carried and discharges, and part mud is past dirty, and flows in device for separation of waste;
(2) the mud process that flows in device for separation of waste is filtered, and diameter is up carried and discharges greater than the rubbish of 3mm, and the mud after filtration is discharged from the both sides of rubbish separating machine;
(3) the mud input from the both sides discharge of rubbish separating machine is added with the first agitated pool of medicament;
(4) mud after entering agitated pool and stirring is pumped to and carries out solid-liquid separation in concentrating unit, and the filtrate of solid-liquid separation is discharged, and the mud after concentrated enters in storage mud groove;
(5) mud after concentrated is pumped in the second agitated pool that is added with medicament;
(6) mud that enters the second agitated pool is pumped in dewatering unit and dewaters, and after dehydration, press filtration water is discharged, and mud is pressed into mud cake.
2. process for treating sludge according to claim 1 is characterized in that in described step 2, mud is isolated diameter up carry and discharge for landfill greater than the rubbish of 3mm.
3. process for treating sludge according to claim 1, is characterized in that in described step 6, the mud cake after dehydration can be used for recycling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010189546 CN102260032B (en) | 2010-05-26 | 2010-05-26 | Sludge treatment method |
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| CN 201010189546 CN102260032B (en) | 2010-05-26 | 2010-05-26 | Sludge treatment method |
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| CN102260032A CN102260032A (en) | 2011-11-30 |
| CN102260032B true CN102260032B (en) | 2013-06-12 |
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| CN 201010189546 Expired - Fee Related CN102260032B (en) | 2010-05-26 | 2010-05-26 | Sludge treatment method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570213A (en) * | 2012-08-06 | 2014-02-12 | 佛山科创玮景环保技术有限公司 | Sludge treatment method |
| CN103894390B (en) * | 2013-10-12 | 2015-02-04 | 南京科盛环保科技有限公司 | Process for governing and repairing polluted sediments of water area |
| CN106242239B (en) * | 2016-08-01 | 2018-05-08 | 中电建水环境治理技术有限公司 | River and lake pool gushes polluted bed mud industrial treatment and regenerative system |
| CN106186639B (en) * | 2016-08-16 | 2018-02-27 | 中电建水环境治理技术有限公司 | Gush native regenerative system more than polluted bed mud processing in river lake |
| CN106277472A (en) * | 2016-09-28 | 2017-01-04 | 深圳市九九八科技有限公司 | A kind of efficient processing equipment of dirt |
| CN113480116A (en) * | 2021-07-20 | 2021-10-08 | 深圳市市政工程总公司 | Dredged sediment solidification modification drying method |
| CN113501635A (en) * | 2021-07-23 | 2021-10-15 | 深圳市天健(集团)股份有限公司 | Environment-friendly dredging and curing modification integrated equipment for dredged sediment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016181A (en) * | 2006-12-28 | 2007-08-15 | 武汉路德科技有限责任公司 | Mud coagulation agent and mud coagulation separation method |
| CN101037287A (en) * | 2007-03-05 | 2007-09-19 | 清华大学 | Method of resource protection, decrement treatment of town sewage and sludge |
| CN101708907A (en) * | 2009-11-28 | 2010-05-19 | 湖州鹿山坞矿业有限公司 | Silt and sewage treatment method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016181A (en) * | 2006-12-28 | 2007-08-15 | 武汉路德科技有限责任公司 | Mud coagulation agent and mud coagulation separation method |
| CN101037287A (en) * | 2007-03-05 | 2007-09-19 | 清华大学 | Method of resource protection, decrement treatment of town sewage and sludge |
| CN101708907A (en) * | 2009-11-28 | 2010-05-19 | 湖州鹿山坞矿业有限公司 | Silt and sewage treatment method |
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