CN202529971U - Drying bed for sludge natural anhydration and digestion - Google Patents
Drying bed for sludge natural anhydration and digestion Download PDFInfo
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- CN202529971U CN202529971U CN2012201625711U CN201220162571U CN202529971U CN 202529971 U CN202529971 U CN 202529971U CN 2012201625711 U CN2012201625711 U CN 2012201625711U CN 201220162571 U CN201220162571 U CN 201220162571U CN 202529971 U CN202529971 U CN 202529971U
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- filtering layer
- mummification
- sludge
- water shoot
- mud
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The utility model relates to the sludge treatment technology, and particularly to a drying bed for sludge natural anhydration and digestion. The drying bed for sludge natural anhydration and digestion includes a drying chamber, wherein a waterproof geomembrane is arranged on a base plate of the drying chamber; a filtering layer with the thickness of 650-750 mm is arranged on the waterproof geomembrane, is laid by gravel filter materials, and includes three layers, namely, an upper filtering layer, a middle filtering layer and a lower filtering layer with filter materials of grain sizes of three different types; a perforation water collecting pipe is arranged in the lower filtering layer and connected with a leachate water drainage pipe; a sludge inlet pipe is arranged on one side wall of the drying chamber; a supernatant fluid water drainage pipe is arranged on the other side opposite to the side wall of the drying chamber; the supernatant fluid water drainage pipe is higher than the upper filtering layer; and a sunlight plate top cover is arranged at the top of the drying chamber. The technical scheme provided by the utility model, is adopted without the limitation of regions and weather, the sludge anhydration speed is high, the stabilization degree is high, and secondary pollution to groundwater is avoided at the same time.
Description
Technical field
The utility model relates to the sludge treatment technology, specifically refers to the drying bed of a kind of natural mummification and digested sludge.
Background technology
Town sewage plant can produce different semi-solid state or the solid sludge of water ratio in sewage purification process, this mud is a kind of heterogeneous body of the complicacy of being made up of mikrobe, organic relic, inorganic particle, colloid etc.Both contain plant nutrients such as carbon, nitrogen, phosphorus, potassium in this mud, also contained hazardous and noxious substances such as pathogenic agent, heavy metal and organic pollutant.The major objective of town sewage plant sludge treatment is minimizing, stabilization and innoxious, avoids secondary pollution.
Sludge drying is the important factor that promotes the mud reuse, no matter is to burn or the soil utilization, and mummification all is an important step.Existing Sewage Plant mainly contains two kinds of schemes to sludge treatment: the one, adopt " concentrating-modified-mechanical dehydration " sludge treatment scheme, and this method is taken up an area of few, but the reagent consumption amount is big, and energy consumption is high; Another kind method is the sludge drying chamber, and mostly conventional mummification chamber is natural filtering layer mummification chamber, and its advantage is that construction cost is low, but anti-permeability performance is poor, has the secondary pollution risk, influenced by Atmospheric precipitation, and the sludge drying effect is unstable.
CN101113068 (open day is on January 30th, 2008) discloses a kind of " sludge concentration desiccation integral pool ", relates to a kind of equipment of sludge treatment, mainly solves the problem that conventional concentration basin investment is big and the time is long.Body bottom in pond is provided with impervious barrier, layer of displacement, drain measure pipe, drainage layer with holes from the bottom to top successively, and body top, pond is provided with cleaning shoe, and the both sides of cleaning shoe are provided with web member, and the web member outer end is slidingly arranged on the chute of pond body wall; Body middle part, pond can also be provided with divider wall.Concentrated, mummification dual function that this utility model has makes full use of lower floor's media filtration and discharges the mud lower layer of water, has shortened sludge dewatering cycle, reduced investment greatly.But this equipment uses and receives the restriction of region, and in the less area of sunlight, the sludge drying cycle is long; The use of this equipment also receives the restriction of territory of use's weather, and in the more area of quantity of precipitation, the sludge drying cycle is long; Simultaneously; The minimizing DeGrain of mud in the winter time, summer the sewage steam output big, the operation of this equipment can produce considerable influence to surrounding enviroment again.
The utility model content
To the above-mentioned deficiency that prior art exists, the technical problem that the utility model will solve is: how to improve the stability of sludge drying, reduce running cost; And use and do not receive the restriction of region and weather, and a kind of novel natural mummification and the drying bed of digested sludge are provided.
Solve this technical problem, the utility model is achieved in that the drying bed of a kind of natural mummification and digested sludge, comprises the mummification chamber, on the base plate of mummification chamber, is provided with waterproofing geomembrane, on waterproofing geomembrane, is provided with filtering layer; It is characterized in that: said thickness of filter bed is 650 ~ 750mm, adopts the gravel filtrate to lay, and filtering layer is made up of the filtrate of last filtering layer, middle filtering layer and three layers of three kinds of different-grain diameter of following filtering layer; Wherein going up thickness of filter bed is 200-300mm, and particle diameter of filter medium is 3-5mm; Middle thickness of filter bed is 200mm, and particle diameter of filter medium is 8-15mm; Following thickness of filter bed is 250mm, and the material particle diameter is 30-40mm; Be provided with the perforation header in the filtering layer down said, the perforation header links to each other with the percolate water shoot; One sidewall of said mummification chamber is provided with into mud pipe, and the opposite side relative with said sidewall is provided with the clear liquid water shoot, and the height of said supernatant water shoot is higher than the said filtering layer of going up; The top of said mummification chamber is provided with the sunlight board top cover.
Further, said perforation header is with the said percolate water shoot of the gradient aspect of 0.8%-1.5%, and said mummification chamber base plate is with the said perforation header of the gradient aspect of 0.8%-1.5%.
Said supernatant water shoot is a plurality of, classification setting on the different heights of said mummification chamber sidewall, and the supernatant water shoot is provided with gate valve.
A nearlyer step ground, said sunlight board top cover has ventpipe, and the outside surface of said sunlight board top cover is provided with movable evaporation window.
A kind of drying bed that utilizes described natural mummification of the utility model and digested sludge carries out the method for sludge drying and digestion process; Comprising the steps: 1) mud gets into the mummification chamber through advancing the mud pipe; Advance lasting 60d of mud cycle; Advance the mud degree of depth and be no more than 1.0m, organic loading is 0.6-3.5 kg VSS/ (m
3.d); 2) when percolate output near zero the time, open the evaporation window of top cover at fine day; 3), after transporting said mummification chamber with dried mud cake, employing machinery or manual type transport outward through after the processing of 180d.
With respect to prior art, the utlity model has following advantage:
(1) the utility model adopts three special metafiltration layer structure, when mud through after advancing the mud pipe and getting into the mummification chamber, most mud granules are trapped within the upward filtration laminar surface, the moisture major part in the mud is discharged the mummification chamber system through the percolate water shoot; Few part is discharged the mummification chamber system through the supernatant water shoot or is evaporated; The whole mummification of mud and digestive process are all accomplished under state of nature in the utility model, improve the stability of sludge drying, need not main equipment or energy input, and management maintenance is easy, can reduce running cost again.
(2) through the sunlight board top cover with heat-insulation and heat-preservation effect is set at top, mummification chamber, can avoid Atmospheric precipitation that sludge drying is had a negative impact, keep the temperature requirements of mud normal temperature digestion simultaneously; Sludge digestion reaction collapsible section is organic, improves mud stability; Organic macromolecular decomposition can promote the release of mud capillary water and planar water; This helps improving sewage sludge solid material content and improves dewatering performance of sludge, reduces the mud resistivity, strengthens transudation; Improve percolate output, and then improve the sludge reduction effect.
(3) the utility model is provided with the supernatant water shoot of the strap brake valve of different heights; When sludge settling was certain, upper strata moisture content was difficult to from dense sludge blanket, down permeate and separates out supernatant, and supernatant can be discharged by the supernatant water shoot of corresponding height, improved sludge drying speed.
(4) the utility model has concurrently and strengthens diafiltration mummification decrement and two kinds of functions of normal temperature digestion stabilization; Processing efficiency is higher and running cost is low; Strong to climate adaptability, be the sludge treatment technology that a kind of utmost point has development potentiality in soil and human resources abundant area.
Description of drawings
Fig. 1 is the plat of the utility model;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the synoptic diagram of perforation header.
Among the figure, 1-mummification chamber, 2-advance mud pipe, the last filtering layer of 3-, filtering layer among the 4-, filtering layer under the 5-; 6-supernatant water shoot, 7-percolate water shoot, 8-sunlight board top cover, 9-ventpipe; The movable evaporation of 10-window, the 11-header of boring a hole, 12-waterproofing geomembrane, 13-mummification chamber base plate.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further explain.
Referring to Fig. 2, can find out that on scheming the drying bed of a kind of natural mummification and digested sludge comprises mummification chamber 1, on mummification chamber base plate 13, is provided with waterproofing geomembrane 12, on waterproofing geomembrane 12, is provided with filtering layer; It is characterized in that: said thickness of filter bed is 650 ~ 750mm, adopts the gravel filtrate to lay, and filtering layer is made up of the filtrate of last filtering layer 3, middle filtering layer 4 and 5 three layers of three kinds of different-grain diameter of following filtering layer; Wherein going up filtering layer 3 thickness is 200-300mm, and particle diameter of filter medium is 3-5mm; Middle filtering layer 4 thickness are 200mm, and particle diameter of filter medium is 8-15mm; Following filtering layer 5 thickness are 250mm, and the material particle diameter is 30-40mm; In said filtering layer 5 down, be provided with perforation header 11, perforation header 11 links to each other with percolate water shoot 7; One sidewall of said mummification chamber 1 is provided with into mud pipe 2, and the opposite side relative with said sidewall is provided with clear liquid water shoot 6, and the height of said supernatant water shoot 6 is higher than the said filtering layer 3 of going up; The top of said mummification chamber 1 is provided with sunlight board top cover 8.Said waterproofing geomembrane is the HDPE geomembrane in the utility model.
Said perforation header 11 is with the said percolate water shoot 7 of the gradient aspect of 0.8%-1.5%, guarantees can be collected to fully in the perforation header 11 through the water in the mud of filtering layer; Said mummification chamber base plate 13 is with the said perforation header 11 of the gradient aspect of 0.8%-1.5%, and the water that has guaranteed to collect in the perforation header 11 can all get into percolate water shoot 7 through perforation header 11 smoothly, and then discharges the mummification chamber system.
The gradient is the steep slow degree on the face of land; Usually be called the gradient to the ratio of domatic vertical height and horizontal clearance; Expression gradient method the most commonly used is exactly the per-cent method, broken to be landform domatic towards, also can be regarded as the direction of current; The header 11 of perforation described in the utility model is for to be meant with the said percolate water shoot 7 of the gradient aspect of 0.8%-1.5%: being provided with relatively of perforation header 11 has certain inclination with horizontal plane, and it hangs down one side and is connected with said percolate water shoot 7; The chamber of mummification described in the utility model base plate 13 is meant with the said perforation header 11 of the gradient aspect of 0.8%-1.5%: the whole surface of mummification chamber base plate 13 tilts to a lowest part with certain angle, and perforation header 11 is connected mummification chamber 13 these lowest parts.
Said supernatant water shoot 6 is a plurality of, classification setting on the different heights of said mummification chamber 1 sidewall, and supernatant water shoot 6 is provided with gate valve.Said supernatant water shoot 6 calibers are 50mm.A plurality of supernatant water shoots 6 can be that equidistant setting also can not equidistant setting at vertical direction.When supernatant arrives the height of a certain supernatant water shoot 6, just open this supernatant water shoot or discharge raising sludge drying speed than the supernatant that its highly lower supernatant water shoot 6 in time will be difficult to from dense sludge blanket, permeate.
Sunlight board top cover 8 has the heat-insulation and heat-preservation effect, can guarantee that mud normal temperature digestion reaction carries out smoothly, realizes sludge stabilizing.Sunlight board top cover 8 can be herring-bone, plate shaped, or a top shape such as cone shape up.Have ventpipe 9 on the sunlight board top cover 8; The outside surface of sunlight board top cover 8 is provided with movable evaporation window 10; When said percolate output near zero the time, select the fine evaporation window 10 of opening sunlight board top cover 8, utilize the further accelerate sludge mummification of the air-dry effect of evaporation process.
The caliber of percolate water shoot 7 and said perforation header 11 is 110mm.
In addition, can partition wall be set according to actual sludge treatment demand mummification chamber 1 is divided into some, recycle, reduce mummification chamber floor space.
The utility model principle of work: mud gets into mummification chamber 1 from advancing mud pipe 2, advances lasting 60d of mud cycle, advances the mud degree of depth and is no more than 1.0m, and organic loading is 0.6-3.5 kg VSS/ (m
3.d); A complete sludge treatment cycle of the drying bed of said natural mummification of the utility model and digested sludge is 180d, wherein, unit " d " expression " my god ", " VSS " expression " volatile solid ".
In sludge handling process; Last filtering layer 3 is trapped in its surface through effects such as deposition, interception, absorption and sievings with the mud granule of the overwhelming majority; The particle diameter of filter medium of following filtering layer 5 is very limited than the big filter effect; It mainly acts on is the supporting layer as last filtering layer 3, but because last filtering layer 3 is bigger with following filtering layer 5 particle diameter of filter medium gaps, direct use filtering layer 5 down will be gone up filtering layer 3 supports; When carrying out sewage water filtration, going up filtering layer 3 filtrates can lose more; Therefore, the middle filtering layer 4 of particle diameter of filter medium between last filtering layer 3 particle diameter of filter medium and following filtering layer 5 particle diameter of filter medium is placed between filtering layer 3 and the following filtering layer 5, can a small amount of mud granule of not lived by last filtering layer 3 interceptions once filtered, tackle on the one hand; Auxiliary on the other hand filtering layer 5 down is filtering layer 3 on the support better, reduces the loss that each WWT cycle goes up filtering layer 3 filtrates.Therefore according to the thickness of last filtering layer 3, centering filtering layer 4 is selected suitable thickness with following filtering layer 5, both can economize in raw materials, and reduces cost, and can play better support effect to last filtering layer 3 again.
After filtering layer 3 was retained down the mud granule of the overwhelming majority on the process, the water that free water in the mud and normal temperature digestion reaction discharge most ofly imported perforation header 11 through gravel packer, finally discharges the mummification chamber systems through percolate water shoot 7; The water that few part is difficult to pass dense sludge blanket will form supernatant, discharge the mummification chamber systems or will evaporate through evaporating window 10 through supernatant water shoot 6.Through percolate that percolate water shoot 7 is discharged and in the supernatant that supernatant water shoot 6 is discharged bacteria content suitable with the water outlet of Sewage Plant two stage biological treatment system; But pollutant loads such as COD, TN and TP are higher; Therefore, carry out a biological disposal upon after this percolate and supernatant all need be back to the Sewage Plant inlet well and former water mixes.
In sludge handling process, when said percolate output near zero the time, select the fine evaporation window 10 of opening sunlight board top cover 8, utilize the air-dry effect of evaporation further to accelerate sludge drying speed.Through after the processing of 180d; The mud that is trapped become volume littler, the higher dried mud cake of stability, its water ratio is 72%-78%, organic content is 34%-40%; Can adopt machinery or manual type that dried mud cake is transported outward, the mummification chamber system gets into the next one immediately and advances the mud cycle.
The filteration of last filtering layer 3 is the strongest, about the selection meeting of last filtering layer 3 thickness of filter bed filtering effect is produced considerable influence.Therefore, the selection of last filtering layer 3 thickness generally can be selected according to the size of the mud resistivity of representing the sludge filtration characteristic.When the mud resistivity was big, the thickness of last filtering layer 3 was also just thick more, and particle diameter of filter medium also can be done suitable adjustment simultaneously.
When the resistivity of mud was big, the organic content in the mud was higher, and when organic content was higher in the mud, the dewatering of mud just lowered.
Handle combined system system sewage plant sludge, the mud resistivity is generally 5 * 10
13M/kg ~ 12 * 10
13M/kg, the thickness of therefore going up filtering layer is chosen as 200mm; When handling separate system system sewage plant sludge, this mud resistivity is 10 * 10
13M/kg ~ 30 * 10
13M/kg, its organic content is higher than content organic in the combined system system sewage plant sludge, and the dewatering of mud is relatively poor, and the thickness of last filtering layer is chosen as 250mm.
Use the utility model to handle mud; A complete sludge treatment week after date has part mud and remains in the filtering layer 3, and the filtrate of going up filtering layer 3 simultaneously also has certain loss; For guaranteeing the mummification efficient and the mummification effect of the utility model; The drying bed entering next one in said natural mummification and digested sludge advanced mud before the cycle, can clean last filtering layer 3, and suitably replenish filtrate.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the aim and the scope of the utility model technical scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (4)
1. the drying bed of natural mummification and digested sludge comprises mummification chamber (1), on mummification chamber base plate (13), is provided with waterproofing geomembrane (12), on waterproofing geomembrane (12), is provided with filtering layer; It is characterized in that: said thickness of filter bed is 650 ~ 750mm, adopts the gravel filtrate to lay, and filtering layer is made up of the filtrate of last filtering layer (3), middle filtering layer (4) and (5) three layers of three kinds of different-grain diameter of following filtering layer; Wherein going up filtering layer (3) thickness is 200-300mm, and particle diameter of filter medium is 3-5mm; Middle filtering layer (4) thickness is 200mm, and particle diameter of filter medium is 8-15mm; Following filtering layer (5) thickness is 250mm, and the material particle diameter is 30-40mm;
In said filtering layer (5) down, be provided with perforation header (11), perforation header (11) links to each other with percolate water shoot (7);
One sidewall of said mummification chamber (1) is provided with into mud pipe (2), and the opposite side relative with said sidewall is provided with clear liquid water shoot (6), and the height of said supernatant water shoot (6) is higher than the said filtering layer (3) of going up;
The top of said mummification chamber (1) is provided with sunlight board top cover (8).
2. the drying bed of natural mummification according to claim 1 and digested sludge; It is characterized in that: said perforation header (11) is that said mummification chamber base plate (13) is with the said perforation header of the gradient aspect of 0.8%-1.5% (11) with the said percolate water shoot of the gradient aspect of 0.8%-1.5% (7).
3. the drying bed of natural mummification according to claim 1 and digested sludge is characterized in that: said supernatant water shoot (6) is a plurality of, classification setting on the different heights of said mummification chamber (1) sidewall, and supernatant water shoot (6) is provided with gate valve.
4. according to the drying bed of each described natural mummification of claim 1-3 and digested sludge, it is characterized in that: said sunlight board top cover (8) has ventpipe (9), and the outside surface of said sunlight board top cover (8) is provided with movable evaporation window (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201625711U CN202529971U (en) | 2012-04-17 | 2012-04-17 | Drying bed for sludge natural anhydration and digestion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201625711U CN202529971U (en) | 2012-04-17 | 2012-04-17 | Drying bed for sludge natural anhydration and digestion |
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| CN202529971U true CN202529971U (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201625711U Expired - Fee Related CN202529971U (en) | 2012-04-17 | 2012-04-17 | Drying bed for sludge natural anhydration and digestion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617011A (en) * | 2012-04-17 | 2012-08-01 | 重庆大学 | Infiltration chamber system for infiltrating, drying and digesting sludge |
| CN105384323A (en) * | 2015-12-03 | 2016-03-09 | 重庆甘泰环保设备有限公司 | Sludge drying tank for town domestic sewage treatment system |
| CN107954582A (en) * | 2017-12-21 | 2018-04-24 | 南京师范大学 | A kind of compound temperature canopy ecological functions bed and it is utilized to carry out the method for mud decrement and Ecological Disposal |
-
2012
- 2012-04-17 CN CN2012201625711U patent/CN202529971U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617011A (en) * | 2012-04-17 | 2012-08-01 | 重庆大学 | Infiltration chamber system for infiltrating, drying and digesting sludge |
| CN102617011B (en) * | 2012-04-17 | 2014-04-16 | 重庆大学 | Infiltration chamber system for infiltrating, drying and digesting sludge |
| CN105384323A (en) * | 2015-12-03 | 2016-03-09 | 重庆甘泰环保设备有限公司 | Sludge drying tank for town domestic sewage treatment system |
| CN107954582A (en) * | 2017-12-21 | 2018-04-24 | 南京师范大学 | A kind of compound temperature canopy ecological functions bed and it is utilized to carry out the method for mud decrement and Ecological Disposal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130417 |