CN108751670A - The quick sludge dewatering treatment system of negative pressure of vacuum agricultural crop straw and method - Google Patents
The quick sludge dewatering treatment system of negative pressure of vacuum agricultural crop straw and method Download PDFInfo
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- CN108751670A CN108751670A CN201810926873.3A CN201810926873A CN108751670A CN 108751670 A CN108751670 A CN 108751670A CN 201810926873 A CN201810926873 A CN 201810926873A CN 108751670 A CN108751670 A CN 108751670A
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- negative pressure
- sludge
- vacuum
- agricultural crop
- crop straw
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system and method, system includes sludge treatment pond, sealing pipeline and negative pressure of vacuum power source；Wherein the sludge treatment pond includes pond body, is equipped with water storage layer, filter layer and sludge blanket in the pond body successively from the bottom to top, and the filter layer fills agricultural crop straw, diaphragm seal is covered on sludge blanket；One end of the sealing pipeline is connected to water storage layer, and the other end is connected with negative pressure of vacuum power source.The invention also discloses the methods.The present invention can utilize a large amount of agricultural crop straw to solve stalk field and burn caused environmental pollution, while provide a kind of sewage plant sludge fast dewatering processing method of inexpensive high-efficiency environment friendly.Present invention process is simple, of low cost, environmental protection, mud-water separation is with obvious effects, efficient, and speed is fast, can large-scale application in sewage treatment plant sludge fast dewatering concentration decrement engineering, economic benefit and social benefit are notable.
Description
Technical field
The present invention relates to Treatment of Sludge more particularly to a kind of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing systems
And method.
Background technology
Urban sewage treatment plant sludge is the product of sewage disposal, is mainly derived from primary sedimentation pond, secondary sedimentation tank etc.
Process procedure.With the raising of the level of urbanization and the increase of sewage load, urban sewage treatment plant sludge yield also will be anxious
Increase severely and adds.These moisture percentage in sewage sludge are all very big, and up to 96~99%, it is usually required for first reducing moisture content, after then carrying out again
After processing.
Sludge dewatering is a most important link in sludge treatment technique flow, the primary of fluidised form, concentration or digestion
After dehydration, volume further can greatly reduce sludge, and the solid content of sludge can greatly increase, such sludge side
Just transport and further processing are disposed.The method of current main sludge dewatering can be divided into nature desiccation method and mechanical dehydration method
Two kinds.Natural desiccation method is dehydrated by natural endowment, and dehydrating effect is by local rainfall, evaporation capacity, gas epidemic disaster etc.
The influence of natural environment is bigger, and the time needed for dehydration is long, maintenance management heavy workload, therefore to efficiency of sludge treatment
It is low, and the sludge solid content of final disposal is low, is not thorough to the pollutant process in sludge, it is big to ambient contamination.Machine
The common sludge dewatering machinery of tool evaporation is broadly divided into the dewatering machine of filtering type and can generate the dewatering machine in the artificial field of force
Two major classes, various sludge dewatering machineries itself have certain defect and certain scope of application, and it is expensive in addition, and sludge is de-
It is required for carrying out chemical conditioning before water, and runs energy consumption greatly, therefore operating cost is very high, in general economically underdeveloped area
Middle-size and small-size urban wastewater treatment firm is difficult to be affordable.
China produces more than 700,000,000 tons of stalk as large agricultural country every year, becomes " use is little " but must dispose
" waste ".In the case, it is handled completely by peasant, there have been a large amount of the phenomenon that burning.Agricultural crop straw becomes agriculture
The new source of village's pollution of area source, the annual summer harvest and when the autumn and winter always have the straw such as a large amount of wheat, rice, soybean, cotton or corn
Stalk burns in field, produces a large amount of heavy smogs, not only becomes the bottleneck problem of rural environmental protection, or even as bringing disaster to
The arch-criminal of urban environment.
Invention content
Goal of the invention：The present invention provides a kind of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system and sides
Method forms diafiltration layer material with agricultural crop straw (stalks such as wheat, rice, rape, soybean, cotton or corn), passes through application
Negative pressure of vacuum makes sludge fast dewatering concentration decrement, and The present invention gives the effective treating methods of agricultural crop straw, provide simultaneously
A kind of sludge fast dewatering processing method of inexpensive high-efficiency environment friendly.
Technical solution：
Negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system of the present invention, including sludge treatment pond, sealing pipeline
With negative pressure of vacuum power source；Wherein the sludge treatment pond includes pond body, is equipped with storage in the pond body successively from the bottom to top
Water layer, filter layer and sludge blanket, the filter layer fill agricultural crop straw, diaphragm seal are covered on sludge blanket；The sealing pipeline
One end be connected to water storage layer, the other end is connected with negative pressure of vacuum power source.
The water storage layer and filter layer are separated by horizontal support plate, and the support plate offers water-permeable and air permeable hole.
A diameter of 10~20mm in the water-permeable and air permeable hole, clear distance is 20~40mm between hole.
The support plate is equipped with infiltration geotextiles.
The frame for being used to support the support plate is equipped in the water storage layer.
The loose laying depth of the filter layer is 30~40cm.
The agricultural crop straw is selected from one or more of stalks such as wheat, rice, rape, soybean, cotton or corn.
The present invention also provides a kind of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing methods, including：Using institute
The quick sludge dewatering treatment system of negative pressure of vacuum agricultural crop straw stated, launches sludge to be drained off on filter layer, described in covering
Diaphragm seal, then start negative pressure of vacuum power source to sludge treatment pond applying vacuum negative pressure.Wherein, the vacuum of application is negative
Pressure is 70~90kPa.
Advantageous effect：The present invention places certain thickness agricultural crop straw (wheat, water by being maked somebody a mere figurehead in sludge treatment pond
The stalks such as rice, rape, soybean, cotton or corn) it is used as filter layer, it is sludge to be drained off on filter layer, Sludge Surface covering is close
Sealer, by the way that water storage layer applying vacuum negative pressure, under negative pressure of vacuum and the collective effect of atmospheric pressure, the moisture in sludge is logical
It crosses agricultural crop straw filter layer and flows into water storage layer, to promote the fast dewatering of sludge blanket.The present invention can utilize a large amount of farming
Object stalk (stalks such as wheat, rice, rape, soybean, cotton or corn) solves crop straw field extremely intractable at present
Problem of environmental pollution caused by burning, while providing a kind of sewage plant sludge fast dewatering processing side of inexpensive high-efficiency environment friendly
Method.Present invention process is simple, of low cost, and environmental protection, mud-water separation is with obvious effects, efficient, fast (the general processing 48 hours of speed
Afterwards, moisture percentage in sewage sludge can drop to 45~55%), can large-scale application in sewage treatment plant sludge fast dewatering concentrate decrement
Engineering, economic benefit and social benefit are notable.
Description of the drawings
Fig. 1 is the diagrammatic cross-section of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system of the present invention；
Fig. 2 is the floor map of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system of the present invention；
Fig. 3 is that the section of sludge treatment pond in negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system of the present invention shows
It is intended to；
Fig. 4 is that the plane of sludge treatment pond in negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system of the present invention is shown
It is intended to；
In figure, 1- sludge treatment ponds, 2- sealing pipelines, 3- negative pressure of vacuum power source, 101- pond bodies, 102- water storages
Layer, 103- filter layers, 104- sludge blankets, 105- support plates, 106- infiltration geotextiles, 107- frames, 108- diaphragm seals, 109- are big
Gas, 301- operating water tanks, 302- injectors, 3021- injection pipes, 3022- nozzles, 3023- water inlet pipes, 303- centrifugal water pumps,
304- pressure gauges, 305- vacuum meters, 306- overflow pipes.
Specific implementation mode
The present invention is further illustrated with reference to specific embodiment.
As shown in Figure 1, Figure 2, negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system of the present invention includes sludge treatment pond
1, sealing pipeline 2 and negative pressure of vacuum power source 3.
Such as Fig. 3,4, sludge treatment pond 1 includes pond body 101, be equipped with successively from the bottom to top in the pond body 101 water storage layer 102,
Filter layer 103 and sludge blanket 104.Water storage layer 102 and filter layer 103 by horizontal support plate 105 and are overlying on support plate 105
On infiltration geotextiles 106 separate, infiltration geotextiles play isolation, filtering and draining effect, the infiltration coefficient of geotextiles
≥5×10-3Cm/s, to ensure that sewage oozed.Support plate 105 plays supporting role, and intensity height, corrosion resistant stainless steel can be used
Plate is made, and offers equally distributed water-permeable and air permeable hole (not shown) in support plate 105, and a diameter of the 10 of water-permeable and air permeable hole
~20mm, clear distance is 20~40mm between hole, and on the one hand which ensures that sewage oozed, on the other hand can avoid applying vacuum negative pressure
When damage infiltration geotextiles.Multiple frames 107 are equipped in water storage layer 102, number can be two, three, four, six etc.,
It is selected according to the Sizes of pond body.Frame 107 plays supporting role, ensures the rigidity of support plate.Filter layer 103 fills farming
Object stalk, wherein agricultural crop straw are selected from one or more of stalks such as wheat, rice, rape, soybean, cotton or corn.
Different according to straw type, agricultural crop straw can directly pave or be paved after pretreatment (according to the soft or hard degree of stalk, agriculture
Crop material can be divided into soft stalk and hard straw.Wheat, rice, rape stalk can be classified as soft stalk, soft stalk
It is easily formed hole between smaller stalk, plays and is percolated permeable effect, directly pave；Soybean, cotton or corn class stalk
It can be classified as hard straw, since gap is larger between hard stalk is natural overlapped stalk, be easy to not have diafiltration by sludge-filled
Layer effect, therefore, hard straw need to be combined with soft stalk, or process be broken into segment after use), surface TGXG
Or bamboo sheathing is fixed.The loose laying depth of filter layer is 30~40cm, and filter layer is excessively thin to be deposited by mud granule, influence to permeate, mistake
Thickness waste straw, waste diafiltration layer material.Sludge blanket 104 is the sludge of the processing to be drained off of filling, and thickness is 1.3~1.5m,
Sludge blanket is excessively thin to reduce treatment effeciency, blocked up to may result in safety accident and influence dehydrating effect.It is covered on sludge blanket 104
Diaphragm seal 108, the effect of diaphragm seal are to ensure the negative pressure of vacuum inside sludge treatment pond 1, Yi Jili to separate inside and outside air
With the pressure difference inside and outside diaphragm seal, allows atmospheric pressure to be applied to by processing sludge blanket, accelerate dehydration.Negative pressure of vacuum power source fills
After setting 3 startups, negative pressure of vacuum is provided, the moisture in pending mud falls into storage by filter layer, infiltration geotextiles, support plate
In water layer 102.
One end of sealing pipeline 2 is connected to water storage layer 102, and the other end is connect with negative pressure of vacuum power source 3.
Negative pressure of vacuum power source 3 includes operating water tank 301, injector (ejector) 302, centrifugal water pump 303.Injection
Device 302 includes injection pipe 3021, the water inlet pipe 3023 for stretching into the nozzle 3022 of injection pipe and being connected to injection pipe.Centrifugal water pump
303 one end is connected with the bottom of operating water tank 301, and the other end is connected by pipeline with the nozzle 3022 of injector, should
Pipeline is equipped with pressure gauge 304.Injection pipe 3021 is in operating water tank 301, and water inlet pipe 3023 is connected to sealing pipeline 2, into
Water pipe 3023 is equipped with vacuum meter 305, and the top of operating water tank is equipped with overflow pipe 306.When operation, after operating water tank is full of water,
Start centrifugal water pump, it is made to generate high-pressure work flow in pump outlet, into the nozzle of injector, high-pressure work flow is logical
It crosses nozzle and forms high-speed jet, generate negative pressure around the nozzle in injection pipe, pass through water inlet pipe and seal pipe at negative pressuren zone
Road 2 connects, and the sewage of water storage layer and gas are sucked out the spray into injector by sealing pipeline 2 under the action of negative pressure
Pipe is penetrated, operating water tank is injected after being mixed with working flow, then be discharged by overflow pipe, can be further pooled to the sewage of discharge
Sewage storage pool.
The process for carrying out sludge dewatering treatment is as follows：
1, sludge treatment pond 1 is built：
(1) according to sludge treatment capacity design scheme is required, determine sludge treatment pond pond body 101 bulk (length,
Width and depth), make and install under(-)chassis 107 and support plate 105.
(2) filter layer is set：It is laid with infiltration geotextiles on the supporting plate, certain thickness crops straw are laid in geotextiles
Stalk (one or more of stalks such as wheat, rice, rape, soybean, cotton or corn) forms filter layer.
(3) sludge is launched：The sludge blanket that need to be handled is launched on agricultural crop straw, Sludge Surface covers diaphragm seal.
2, negative pressure of vacuum power source 3 is installed according to above structure.
3, setting sealing pipeline 3 connects sludge treatment pond 1 and negative pressure of vacuum power source 3.
By negative pressure of vacuum power source 3 in sludge treatment pond 1 applying vacuum negative pressure, in negative pressure of vacuum and atmospheric pressure
Under the collective effect of power, the moisture in sludge flows into water storage layer 102 by the filter layer that agricultural crop straw is formed, to promote dirt
Mud layer fast deep is dehydrated.
Embodiment 2
Using the negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system of embodiment 1.
Frame made of stainless steel is set in sludge treatment pond 1, support plate is laid on frame, it is permeable in support plate
A diameter of 20mm of stomata, clear distance is 20mm between hole.
It is laid with infiltration geotextiles on the supporting plate, the infiltration coefficient of geotextiles requires >=5 × 10-3cm/s。
The Geotextile wheat stalk that paves forms filter layer, and the loose laying depth of wheat stalk is 40cm, wheat stalk table
Face is fixed with TGXG.
The high-moisture-contensludge sludge process layer that dispensing need to be handled on the filter layer that wheat stalk is formed, moisture content 99%,
Thickness is 1.5m, and Sludge Surface covers diaphragm seal.
Negative pressure of vacuum power source is installed, is filled with negative pressure of vacuum power source using sealing pipeline connection sludge treatment pond
It sets, the negative pressure of vacuum that negative pressure of vacuum power source provides is 80~90kPa.
Start negative pressure of vacuum power source to be carried out dehydrating sludge, after 48 hours, measures sludge on wheat stalk
Average moisture content 52% or so.
Under same process conditions, under conditions of embodiment 2, after being dehydrated as filter layer using other different stalks
Moisture content can reach or less than embodiment 2 average moisture content.
Above-mentioned specific implementation mode is the preferred embodiment of the present invention, can not be limited the invention, and others are appointed
The change or other equivalent substitute modes what is made without departing from technical scheme of the present invention, are included in the protection of the present invention
Within the scope of.
Claims (8)
1. a kind of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system, which is characterized in that including sludge treatment pond
(1), sealing pipeline (2) and negative pressure of vacuum power source (3)；Wherein the sludge treatment pond includes pond body (101), the pond
It is equipped with water storage layer (102), filter layer (103) and sludge blanket (104) successively from the bottom to top in vivo, the filter layer fills crops
Stalk is covered with diaphragm seal (108) on sludge blanket；One end of the sealing pipeline is connected to water storage layer, the other end and negative pressure of vacuum
Power source is connected.
2. negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system according to claim 1, which is characterized in that institute
It states water storage layer and filter layer to separate by horizontal support plate (105), the support plate offers water-permeable and air permeable hole.
3. negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system according to claim 2, which is characterized in that institute
A diameter of 10~20mm in water-permeable and air permeable hole is stated, clear distance is 20~40mm between hole.
4. negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system according to claim 2, which is characterized in that institute
It states support plate and is equipped with infiltration geotextiles (106).
5. negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system according to claim 2, which is characterized in that institute
State the frame (107) for being equipped in water storage layer and being used to support the support plate.
6. negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system according to claim 1, which is characterized in that institute
The loose laying depth for stating filter layer is 30~40cm.
7. negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system according to claim 1, which is characterized in that institute
It states agricultural crop straw and is selected from one or more of wheat, rice, rape, soybean, cotton, maize straw.
8. a kind of negative pressure of vacuum agricultural crop straw sludge fast dewatering processing method, which is characterized in that including：Using claim
1~7 any one of them negative pressure of vacuum agricultural crop straw sludge fast dewatering processing system, dirt to be drained off is launched on filter layer
Mud covers the diaphragm seal, then starts negative pressure of vacuum power source to sludge treatment pond applying vacuum negative pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926873.3A CN108751670A (en) | 2018-08-15 | 2018-08-15 | The quick sludge dewatering treatment system of negative pressure of vacuum agricultural crop straw and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926873.3A CN108751670A (en) | 2018-08-15 | 2018-08-15 | The quick sludge dewatering treatment system of negative pressure of vacuum agricultural crop straw and method |
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| CN201810926873.3A Pending CN108751670A (en) | 2018-08-15 | 2018-08-15 | The quick sludge dewatering treatment system of negative pressure of vacuum agricultural crop straw and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396009A (en) * | 2019-08-02 | 2019-11-01 | 济南中合环保科技有限公司 | A method of organic fertilizer is produced using municipal sludge |
| CN111847826A (en) * | 2020-07-31 | 2020-10-30 | 江苏科技大学 | Bottom vacuum negative pressure double-sided rapid sludge dewatering experiment and application system |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101759342A (en) * | 2009-12-09 | 2010-06-30 | 华侨大学 | Sludge vacuum subcharge combined compressing and dewatering device |
| CN102329062A (en) * | 2011-09-08 | 2012-01-25 | 嘉兴学院 | Electroosmosis method and device for dehydrating energy-containing sludge |
| CN102498837A (en) * | 2011-09-30 | 2012-06-20 | 山东胜伟园林科技有限公司 | Seedling planting method in alkaline land |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110396009A (en) * | 2019-08-02 | 2019-11-01 | 济南中合环保科技有限公司 | A method of organic fertilizer is produced using municipal sludge |
| CN111847826A (en) * | 2020-07-31 | 2020-10-30 | 江苏科技大学 | Bottom vacuum negative pressure double-sided rapid sludge dewatering experiment and application system |
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