CN109179955A - A kind of sludge dewatering treatment system and its processing method - Google Patents
A kind of sludge dewatering treatment system and its processing method Download PDFInfo
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- CN109179955A CN109179955A CN201810924084.6A CN201810924084A CN109179955A CN 109179955 A CN109179955 A CN 109179955A CN 201810924084 A CN201810924084 A CN 201810924084A CN 109179955 A CN109179955 A CN 109179955A
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- 239000010802 sludge Substances 0.000 title claims abstract description 320
- 238000003672 processing method Methods 0.000 title abstract description 5
- 230000018044 dehydration Effects 0.000 claims abstract description 90
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 90
- 238000002156 mixing Methods 0.000 claims abstract description 45
- 238000005189 flocculation Methods 0.000 claims abstract description 44
- 230000016615 flocculation Effects 0.000 claims abstract description 43
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 230000003311 flocculating effect Effects 0.000 claims abstract description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 59
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 59
- 239000004571 lime Substances 0.000 claims description 59
- 239000002002 slurry Substances 0.000 claims description 38
- 239000003814 drug Substances 0.000 claims description 37
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 36
- 238000012546 transfer Methods 0.000 claims description 32
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 26
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- 239000013043 chemical agent Substances 0.000 abstract description 9
- 208000005156 Dehydration Diseases 0.000 description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000007787 solid Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000004744 fabric Substances 0.000 description 11
- 239000010865 sewage Substances 0.000 description 10
- 238000004062 sedimentation Methods 0.000 description 9
- 238000011084 recovery Methods 0.000 description 8
- 239000000706 filtrate Substances 0.000 description 7
- 239000003292 glue Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010801 sewage sludge Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
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- 230000003571 opsonizing effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 239000013049 sediment Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- 239000000725 suspension Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to technical field of sludge treatment, and in particular to a kind of sludge dewatering treatment system and its processing method.It is 85~90% that mud dewatering method, which includes: by sludge pre-dehydration to be processed to sludge moisture content, and polyacrylamide is added during pre-dehydration；Primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；Flocculant is added into the mixing sludge and carries out flocculation reaction；For sludge after flocculation under the pressure of 12~20bar, filter-press dehydration obtains mud cake.Mud dewatering method of the invention has that consumption of chemical agent is few, flocculating effect is good, and dehydration property is good, low noise, simple process, and system automation degree is high, can large-scale application advantage.
Description
Technical field
The invention belongs to technical field of sludge treatment, and in particular to a kind of sludge dewatering treatment system and its processing method.
Background technique
In recent years, being constructed and put into operation with large quantities of sewage treatment plants, wastewater treatment in China achieve huge achievement.But
It is that, with the continuous improvement for sharply increasing and handling standard of sewage load, specific resistance to filtration is faced with increasing
Pressure.Sewage treatment generally comprises tertiary treatment, and coagulation is, such as grid, precipitating or air bearing, to go to decontaminate by mechanical treatment
Stone, sandstone contained in water and fat, grease etc..Two stage treatment is biological treatment, and the pollutant in sewage is in microorganism
Sludge is degraded and is converted under effect.Tertiary treatment is the advanced treating of sewage, it include nutrients removal and by plus
Chlorine, ultraviolet radioactive or ozone technology carry out disinfection to sewage.Sedimentation basin can be all set in sewage disposal process, and sedimentation basin is general
It is the structures of mud-water separation before biochemistry or after biochemistry, mostly separates the thinner sludge of particle.Title before biological treatment
For primary sedimentation tank, the sludge precipitated in primary sedimentation tank is known as primary sludge, and inorganic matter is more, and sludge quantity is small, and moisture content is heavy relative to two
Pond sludge is lower.Sedimentation basin after biological treatment is commonly referred to as secondary settling tank, mostly organic sludge, and sludge quantity is big, sludge
Moisture content is high, and therefore, the dehydration of general sludge refers to the processing to secondary sludge.
A large amount of poisonous and harmful substances, bacterium, pathogen for containing in sludge etc. easily cause secondary pollution to environment, and
And there are great pop-up threat hidden danger.It is shown according to finding, sludge caused by wastewater treatment in China factory has
80% is not dealt carefully with, and sludge is arbitrarily stacked and caused pollution has been highlighted with recontamination problem, and
Cause the concern of society.China's Treatment of Sludge and disposition still in its infancy, are shown, in sludge handling process according to investigation
In, most sewage treatment plants are all that sludge is handled using thickening, in general, can obtain 20% using mechanical dehydration
~30% solid content is formed by sludge and is also referred to as mud cake.Mechanical dehydration method has filtering and centrifugal process.Filtering is by wet dirt
Mud is filtered with filtering layer (porous material such as filter cloth, wire mesh), so that moisture (filtrate) is seeped filter layer, dewatered sludge (filter cake) is then
It is trapped on filtering layer.Centrifugal process is that difference tendency to drift away caused by solid, liquid difference in specific gravity in sludge is borrowed to reach mud-water separation.It crosses
The equipment of filter method has vacuum filter, plate and frame filter press and band filter.Wherein, plate and frame filter press sets for chemical industry is common
Standby, filtered driving force is big, and moisture content of the cake is lower, is interval into mud, mud extraction, and productivity is lower.Manually-operated sheet frame pressure
Filter, labor intensity is very big, uses machine automatization operation instead mostly.Mechanical dehydration method is mainly used for primary sedimentation pond sludge and digestion
Sludge.The moisture content of dewatered sludge is related with sludge quality and dewatering.
The water content with higher of sludge caused by sewage treatment is adopted due to characteristic of the moisture in conjunction with mud granule
Mechanically removing has certain limitation, the additive amount of the content of organic matter, ash content ratio especially flocculant in sludge
Final solid content is had an important influence.Therefore, it is first pre-processed before sludge dewatering, is dehydrated again after improving dewatering.
Sludge strengthen dehydration technique be it is newly developed now go out a kind of sludge from wastewater treatment plant is dried with additive, surely
The method of fixedization and recycling treatment.Using technical matters composed by chemical desiccation reagent and corresponding sludge drying device,
Product resourcebility utilizes after having the advantages that without secondary pollution, highly-safe, small investment, sludge drying.Chinese patent
CN103896475B discloses a kind of Opsonizing method of sludge high-drying dehydration, including into mud step, into conditioner step, stirring step
Suddenly, to board and frame machine into mud step；Wherein conditioner step is that liquor ferri trichloridi is first added into conditioner by dosing pump, so
After quick lime is added；To board and frame machine into mud step be after conditioning, from conditioner by pump to board and frame machine into mud；Conditioner
It to board and frame machine into mud is realized by two pumps, when pressure is smaller, by low-lift pump into mud；When pressure is larger, switching
To high-pressure pump into mud.Chinese patent application CN102372412A discloses a kind of mud dewatering method, including step 1, by sludge
It is stirring evenly and then adding into water, the ratio of sludge and water is 1: 1；Uniformly mixed flocculant is added to step by step 2 while stirring
It in rapid 1 resulting solution, is stirred for after adding 5 to 10 minutes, it is made adequately after mixing, to remove the emersion object on upper layer；
Step 3 pours into step 2 resulting solution in dehydration device, opens vacuum pump, is the true of 0.1MPa-0.15MPa in vacuum degree
It is dehydrated under sky.However, in the prior art, mud dewatering method is most widely addition chemical agent, but how
Add chemical agent, to where chemical agent is added, how to realize low chemical agent high disposal effect and reduce energy consumption, how
Realize that large-scale application, how simplifying technique, there is still a need for further researchs.
Summary of the invention
Present invention solves the technical problem that being to overcome in the prior art that consumption of chemical agent is big, dewatering rate is low, sludge
Tough defect, to provide, a kind of consumption of chemical agent is few, flocculating effect is good, the good sludge dewatering treatment of dehydration property
System and its processing method.
In order to solve the above technical problem, the present invention provides a kind of mud dewatering methods, comprising the following steps:
(1) it is 85~90% by sludge pre-dehydration to be processed to sludge moisture content, polypropylene is added during pre-dehydration
Amide；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 12~20bar, filter-press dehydration obtains mud cake.
Further, in the step (2), the additional amount of primary sludge is 30~50% of sludge quantity after pre-dehydration；It is excellent
Choosing, the additional amount of primary sludge is 35% of sludge quantity after pre-dehydration.
Further, in the step (1), the additional amount of polyacrylamide is 0.5~4kg/T dewatered sludge；Preferably, gather
The additional amount of acrylamide is 2.5kg/T dewatered sludge.
Further, in the step (1), pre-dehydration carries out in drum concentration machine.
Further, in the step (3), flocculant is ferric trichloride and lime slurry, wherein the addition of ferric trichloride
Amount is 155~175kg/T dewatered sludge, and lime slurry additional amount is 1500~3750kg/T dewatered sludge；Preferably, ferric trichloride
Additional amount is 160kg/T dewatered sludge, and lime slurry additional amount is 1550kg/T dewatered sludge.
Further, the mass concentration of the lime slurry is 10~15%；Preferably, the mass concentration of lime slurry is
10%.
Further, in the step (4), filters pressing is carried out in plate and frame filter press.
Further, the sheet frame of plate and frame filter press is having a size of 1500 × 1500, filter plate number 120-150 block, filter chamber thickness
32mm, filter area 448m2。
A kind of sludge dewatering treatment system, including sludge condensation processing unit and plate compression dewatering unit,
Sludge condensation processing unit, including, sequentially connected excess sludge reservoir, drum concentration machine and mixing sludge storage
Pond, wherein the mixing sludge reservoir is also connected with primary sludge transfer pipeline；
Plate compression dewatering unit, including, the plate and frame filter press that flocculation tank is connected with it, wherein the flocculation is anti-
Ying Chi is also connected with lime slurry transfer pipeline；And the flocculation tank is also connected with the mixing sludge reservoir.
Further, tube mixer I, the mixing are additionally provided between the excess sludge reservoir and drum concentration machine
Tube mixer II is additionally provided between sludge storage pool and flocculation tank.
Further, the tube mixer I is also connected with PAM transfer pipeline, and the tube mixer II is also connected with
Ferric trichloride transfer pipeline.
Further, the lime slurry transfer pipeline, PAM transfer pipeline and ferric trichloride transfer pipeline are respectively at lime
The quenched medicament medicine dissolving tank of slurry pool, PAM is connected with the quenched medicament medicine dissolving tank of ferric trichloride.
Further, the quantity of the tube mixer I and the quantity of drum concentration machine are corresponding, are 1-4；It is preferred that
Ground, the quantity of the tube mixer I and the quantity of drum concentration machine are 3.
Further, the quantity of the tube mixer II and the quantity of flocculation tank are corresponding, are 1-3；It is preferred that
Ground, the quantity of the tube mixer II and the quantity of flocculation tank are 2.
Further, the quantity of the plate and frame filter press is 1~2 times of flocculation tank quantity.
Further, the lime white liquid pool is 1~4, planar square, available depth 2.5m, reinforced concrete structure.
Further, it is equipped in the lime white liquid pool and adds pump, power is 5.5~10kW, flow 10m3/ h, pressure
2bar。
Further, highest liquid level is fed in the lime white liquid pool is limited to pool capacity 80-90%, discharging minimum liquid level limit
It is scheduled on pool capacity 10-20%；Preferably, highest liquid level is fed in lime white liquid pool is limited to pool capacity 85%, discharging minimum liquid level limit
It is scheduled on pool capacity 15%.
Further, the drum concentration machine uses totally-enclosed drum structure, including rotary drum, rinse-system, frame, filtrate
Collecting tank, protection board and driving device；Wherein, the rinse-system includes flush water pump, shut-off valve, solenoid valve and with nozzle
Pipeline；Filtrate of the flushing water used in rinse-system in filtrate collecting tank.
Further, frame described in drum concentration machine uses stainless steel or hot-galvanized steel material.
Further, being pumped into mud by low pressure screw for the plate and frame filter press is successively completed with high-pressure diaphragm pump.
Technical solution of the present invention has the advantages that
1, this patent is quenched using two-stage sludge medicament, i.e., in drum concentration stage and plate compression stage, respectively
Select different medicaments；Polyacrylamide (PAM) is selected in the drum concentration stage, PAM is a kind of water-soluble polymer, has pole
Property group-amide groups, be easy to that its hydrogen is borrowed to be good for acts on the absorption of sand grain appearance, and there are also very long strand, long-chain exists PAM
It builds bridge between particle, constitutes the floccule body of bulky grain, have the effects that flocculation, thickening, sludge can be made to be coagulated rapidly by subparticle
It is polymerized to bulky grain, and forms the agglomerate floccule body of reticular structure；FeCl is selected in the plate compression stage3And lime, it adds first
Ferric trichloride forms positive charge by aquation, can neutralize the negative electrical charge of mud granule, improves flocculating effect；Then make
Basicity is adjusted with quick lime, ferric trichloride with the alkaline matter network synthetic macromolecule sediment in sludge, can also play secondary
Flocculant effect, meanwhile, by the dosage of control quick lime, deodorization and Disinfection Effect can also be played, enhances grain structure,
Hole is provided, its compressibility is reduced；And use the collocation of inorganic and organic flocculant, mixing is quenched to make solid particulate matter knot
Heshui and absorption water are released, and sludge structure reaches homogeneously, destroys cell wall, and sludge viscosity is greatly lowered, it is de- to improve sludge
Water effect.
2, drum concentration is using gradually pressurization and the effect of shearing force make sludge further be dehydrated heel row between upper and lower strainer
Out, the yield and mass dryness fraction of sludge can be controlled by stepless speed change device, while rotating cylinder is used as fine fack, plays preferable effect.
3, the biggish particle of density, such as the grains of sand, metal powder are typically contained in Sludge from primary sedimentation tank, after drum concentration
Sludge is mixed with primary sludge, and primary sludge can be used as the medicament nucleus of the quenched process of subsequent sludge, is conducive to sludge dewatering,
And the addition of chemical agent is largely saved.
4, it is added using lime slurry as quenched medicament after lime dissolution with certain concentration of slurry, increases medicament and dirt
The intergranular contact effect of mud, makes cell in sludge be easier broken wall.Due to having used lime in dehydration, in the same of sludge conditioning
When realize the stabilisation of sludge, and eliminate the stench in usual sludge handling process.Sludge dewatering computer room in actual motion,
Ordorless generation, the operating environment of worker are very good in mud cake heap canopy.This point has also broken plate compression in traditional concept
The shortcomings that machine severe operational environment.
5, dehydration property is preferable, and mud cake is not bound on filter cloth.When filter plate is opened, mud cake entirety Automatic-falling.
6, mud pump characteristic is high, practical mud pump characteristic fallen up to 45% or more, mud cake after at larger bulk.In fine day
Under gas, dried through 2 days room temperature, mud pump characteristic can be up to 80% or more.
7, the high degree of automation of system, 1 administrative staff can manage the operation of 2 dewaterers simultaneously.Required pipe
Science and engineering is also only to make an inspection tour, watch equipment operation condition.The even cleaning of filter cloth also only needs operator to open corresponding
Program can be completed.
8, for the equipment of whole system without running at high speed component, noise is very low, and consumption of chemical agent is few, flocculating effect
Good, dehydration property is good, simple process, can large-scale application.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 sludge dewatering treatment system
Description of symbols:
1. secondary settling tank；2. excess sludge reservoir；3. drum concentration machine；4. primary sedimentation tank；5. mixing sludge reservoir；6. flocculation is anti-
Ying Chi；7. lime white liquid pool；8. plate and frame filter press；9. sludge transports outward pond；The quenched medicament medicine dissolving tank of 10.PAM；11. ferric trichloride
Quenched medicament medicine dissolving tank；12. tube mixer I；13. tube mixer II；14.PAM transfer pipeline, the conveying of 15. ferric trichlorides
Pipeline, 16. primary sludge transfer pipelines；17. lime slurry delivery pipe.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
As shown in Figure 1, sludge dewatering treatment system of the present invention, comprising: sludge condensation processing unit and plate compression dehydration
Unit, wherein
Sludge condensation processing unit, including, sequentially connected excess sludge reservoir, drum concentration machine and mixing sludge storage
Pond, wherein the mixing sludge reservoir is also connected with primary sludge transfer pipeline；
Plate compression dewatering unit, including, the plate and frame filter press that flocculation tank is connected with it, wherein the flocculation is anti-
Ying Chi is also connected with lime slurry transfer pipeline；And the flocculation tank is also connected with the mixing sludge reservoir；
Tube mixer I is additionally provided between excess sludge reservoir and drum concentration machine, mixing sludge reservoir and flocculation are anti-
Tube mixer II is additionally provided between Ying Chi.
Tube mixer I is also connected with PAM transfer pipeline, and tube mixer II is also connected with ferric trichloride transfer pipeline.
Lime slurry transfer pipeline, PAM transfer pipeline and ferric trichloride transfer pipeline are respectively at lime white liquid pool, PAM tune
Matter medicament medicine dissolving tank is connected with the quenched medicament medicine dissolving tank of ferric trichloride.
Above scheme is the core of sludge dewatering treatment system of the present invention, and sludge condensation unit is by be processed two heavy dirts
Mud carries out pre-dehydration, moisture percentage in sewage sludge can be down to about 90% from 97~99%；After plate compression dewatering unit is to pre-dehydration
Sludge carry out deep dehydration, plate and frame filter press dehydration after 55% or less moisture content of the cake；
Excess sludge reservoir is used to store secondary sludge to be processed, and tube mixer I is sufficiently mixed sludge and medicament,
Drum concentration machine is that pre-dehydration is carried out to sludge, mixing sludge reservoir be by after pre-dehydration sludge and primary sludge mix it is equal
It is even.Tube mixer II is to be uniformly mixed the sludge in mixing sludge reservoir with medicament, and lime white is injected in flocculation tank
Liquid progress flocculation reaction is mixing sludge, medicament, lime slurry provide sufficient reaction compartment and time, and plate and frame filter press is main
Sludge press filtration after abundant flocculation is dehydrated by the dehydration instrument wanted.
Lime white liquid pool dissolves lime, is added with certain concentration of slurry, increases medicament contact between mud granule
Effect makes cell in sludge be easier broken wall.Due to having used lime in dehydration, sludge is realized while sludge conditioning
It stabilizes, and eliminates the stench in usual sludge handling process.Wherein, the mass concentration of lime slurry is 10~15%.Stone
The dosage of grey slurries is 1500~3750kg/T dewatered sludge.
Primary sludge transfer pipeline is used to for primary sludge being sent into mixing sludge reservoir, and primary sludge is arranged from primary sedimentation tank bottom
Out, mainly various object mineral suspensions and partial organic substances, heavy metal etc., biological content is relatively fewer, and mud amount is less；Two
Heavy sludge is discharged from secondary settling tank, mainly various organic matters, inorganic matter, microbial body, primary, metazoa, heavy metal
Equal condensates, there are many number, and mud amount is very big.The present invention mixes primary sludge with the sludge after pre-dehydration, and primary sludge can be with
As the nucleus in subsequent flocculation process, flocculated effect is materially increased, reduces the dosage of flocculant.It is just heavy
The additional amount of sludge is 30~50% of sludge quantity after pre-dehydration.
PAM transfer pipeline is used to polyacrylamide being sent into tube mixer I to be uniformly mixed with sludge, and primary wadding occurs
Solidifying reaction, the additional amount of PAM are 0.5~4kg/T dewatered sludge；Ferric trichloride transfer pipeline is used to for flocculant ferric trichloride being sent into
Tube mixer II is uniformly mixed with sludge, and the additional amount of ferric trichloride is 155~175kg/T dewatered sludge；The quenched molten medicine of medicament
Pond is used to medicament being adjusted to suitable concentration, so that medicament plays flocculating effect to the full extent.
The quantity of tube mixer I and the quantity of drum concentration machine are corresponding, are 1-4；Preferably, the tubular-mix
The quantity of device I and the quantity of drum concentration machine are 3.
The quantity of tube mixer II and the quantity of flocculation tank are corresponding, are 1-3；Preferably, the tubular type is mixed
The quantity of clutch II and the quantity of flocculation tank are 2.
The quantity of plate and frame filter press is 1~2 times of flocculation tank quantity.
Lime white liquid pool is 1~4, planar square, available depth 2.5m, reinforced concrete structure.Lime slurry adds
Pump power 5.5~10kW of power, flow 10m3/ h, pressure 2bar.Highest liquid level is fed in lime white liquid pool is limited to pool capacity 80-
90%, discharging minimum liquid level is limited to pool capacity 10-20%；Preferably, highest liquid level is fed in lime white liquid pool be limited to pool capacity
85%, discharging minimum liquid level is limited to pool capacity 15%.
Drum concentration machine uses totally-enclosed drum structure, including rotary drum, rinse-system, frame, filtrate collecting tank, protection board
And driving device；Wherein, the rinse-system includes flush water pump, shut-off valve, solenoid valve and the pipeline with nozzle；Rinse-system
The filtrate of flushing water used in filtrate collecting tank.Frame described in drum concentration machine uses stainless steel or hot galvanizing steel
Matter.
Plate and frame filter press is successively completed into mud by low pressure screw pump and high-pressure diaphragm pump.
The working principle of sludge dewatering treatment system of the present invention:
Sludge in secondary settling tank is transferred to excess sludge reservoir, the secondary sludge in excess sludge reservoir is sent into tubular type and is mixed
In clutch I, at the same start the quenched medicament medicine dissolving tank of PAM by PAM by PAM transfer pipeline be sent into tube mixer I, make medicament and
Secondary sludge is uniformly mixed in tube mixer I, is sent into drum concentration machine and is carried out pre-dehydration；
Sludge after pre-dehydration is sent into mixing sludge reservoir, while primary sludge being sent by primary sludge transfer pipeline
Enter mixing sludge reservoir, the sludge and primary sludge after making pre-dehydration are uniformly mixed；
Uniformly mixed sludge is sent into tube mixer II, while starting the quenched medicament medicine dissolving tank of ferric trichloride for trichlorine
Change iron and be sent into tube mixer II by ferric trichloride transfer pipeline, mixes medicament in tube mixer II with sludge
It is even；
Uniformly mixed sludge is sent into flocculation tank, while the lime slurry in lime white liquid pool is passed through into lime white
Liquid transfer pipeline is sent into flocculation tank, and the two is made to carry out flocculation reaction；
Sludge after flocculation is sent into plate and frame filter press dehydration, dewatered sludge is sent into sludge and transports outward pond, is taken off
Sewage sludge.
For a kind of sludge dewatering treatment system of the invention, above-mentioned implementation result is divided by following case history
Analysis verifying, is specifically described as follows:
Certain sewage treatment plant, highly stable always reliable using the set sludge dewatering system since commencement of commercial operation, dehydration
It works well.The moisture content of secondary sludge is 98~99% in secondary settling tank, the sheet frame of plate and frame filter press having a size of 1500 × 1500,
Filter plate number 120-150 block, filter chamber thickness 32mm, filter area 448m2。
The carrying out practically process of system are as follows:
Secondary sludge in excess sludge reservoir is sent into tube mixer I, while PAM is passed through into PAM transfer pipeline
It is sent into tube mixer I, is uniformly mixed medicament and secondary sludge in tube mixer I, drum concentration machine is sent into and carries out in advance
Dehydration；
Sludge after pre-dehydration is sent into mixing sludge reservoir, opens simultaneously primary sludge by just intending sludge carrier pipe road
It is sent into mixing sludge reservoir, the sludge and primary sludge after making pre-dehydration are uniformly mixed；
Uniformly mixed sludge is sent into tube mixer II, while ferric trichloride being sent by ferric trichloride transfer pipeline
Enter tube mixer II, is uniformly mixed medicament in tube mixer II with sludge；
Uniformly mixed sludge is sent into flocculation tank, while flocculation is added instead in the lime slurry in lime white liquid pool
Ying Chi makes the two carry out flocculation reaction；
Sludge after flocculation is sent into plate and frame filter press dehydration, obtains dewatered sludge.
Wherein, the additional amount of primary sludge is 35% of sludge quantity after pre-dehydration, lime slurry quality in lime white liquid pool
Concentration is 10~15%, and rotary drum rotation speed is 1.0-6.26rad/min in drum concentration machine；Dirt after the concentration of drum concentration machine
Mud moisture content is down to 88-90%.The dewatered moisture percentage in sewage sludge of plate and frame filter press is down to 55% or less.This system actual motion number
According to being shown in Table 1.
1 sludge dewatering treatment system practical operation situation of table and operation data:
Embodiment 2
(1) use drum concentration machine pre-dehydration to sludge moisture content for 90% in sludge to be processed, during pre-dehydration
Polyacrylamide is added；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 12bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of polyacrylamide is 2.5kg/T dewatered sludge, and the additional amount of primary sludge is sludge after pre-dehydration
The 30% of amount, flocculant are ferric trichloride and lime slurry, and the additional amount of ferric trichloride is 155kg/T dewatered sludge, lime slurry
Concentration be 15%, dosage be 1600kg/T dewatered sludge；Rotary drum rotation speed is 6.26rad/min in drum concentration machine.
The moisture content for finally measuring sludge after plate compression is 52%, capillary water absorbing time (CST) 80s, sludge in bulk,
Do not glue filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 16%, and the solid recovery rate of dewatering system is 92%.
Embodiment 3
(1) use drum concentration machine pre-dehydration to sludge moisture content for 88% in sludge to be processed, during pre-dehydration
Polyacrylamide is added；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 20bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of polyacrylamide is 1.5kg/T dewatered sludge, and the additional amount of primary sludge is sludge after pre-dehydration
The 50% of amount, flocculant are ferric trichloride and lime slurry, and the additional amount of ferric trichloride is 165kg/T dewatered sludge, lime slurry
Concentration be 10%, dosage be 3000kg/T dewatered sludge；Rotary drum rotation speed is 3.5rad/min in drum concentration machine.
The moisture content for finally measuring sludge after plate compression is 48%, capillary water absorbing time (CST) 85s, sludge in bulk,
Do not glue filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 18%, and the solid recovery rate of dewatering system is 91%.
Embodiment 4
(1) use drum concentration machine pre-dehydration to sludge moisture content for 85% in sludge to be processed, during pre-dehydration
Polyacrylamide is added；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 18bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of polyacrylamide is 3.5kg/T dewatered sludge, and the additional amount of primary sludge is sludge after pre-dehydration
The 45% of amount, flocculant are ferric trichloride and lime slurry, and the additional amount of ferric trichloride is 168kg/T dewatered sludge, lime slurry
Concentration be 14%, dosage be 2500kg/T dewatered sludge；Rotary drum rotation speed is 4.5rad/min in drum concentration machine.
The moisture content for finally measuring sludge after plate compression is 51%, capillary water absorbing time (CST) 88s, sludge in bulk,
Do not glue filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 16%, and the solid recovery rate of dewatering system is 90%.
Embodiment 5
(1) use drum concentration machine pre-dehydration to sludge moisture content for 89% in sludge to be processed, during pre-dehydration
Polyacrylamide is added；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 15bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of polyacrylamide is 2.0kg/T dewatered sludge, and the additional amount of primary sludge is sludge after pre-dehydration
The 40% of amount, flocculant are ferric trichloride and lime slurry, and the additional amount of ferric trichloride is 160kg/T dewatered sludge, lime slurry
Concentration be 12%, dosage be 2100kg/T dewatered sludge；Rotary drum rotation speed is 5.5rad/min in drum concentration machine.
The moisture content for finally measuring sludge after plate compression is 50%, capillary water absorbing time (CST) 90s, sludge in bulk,
Do not glue filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 14%, and the solid recovery rate of dewatering system is 90%.
Comparative example 1
(1) sludge to be processed is used into drum concentration machine pre-dehydration；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 15bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of primary sludge is 40% of sludge quantity after pre-dehydration, and flocculant is ferric trichloride and lime white
Liquid, the additional amount of ferric trichloride are 160kg/T dewatered sludge, and the concentration of lime slurry is 12%, and dosage is 2100kg/T dewatered sludge；
Rotary drum rotation speed is 5.5rad/min in drum concentration machine.
In the case where drum concentration machine parameter constant, it is added without polyacrylamide, the moisture content of sludge is after pretreatment
95%, the moisture content for finally measuring sludge after plate compression is 56%, and capillary water absorbing time (CST) 105s, sludge is in bulk, no
Viscous filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 25%, and the solid recovery rate of dewatering system is 88%.
Comparative example 2
(1) use drum concentration machine pre-dehydration to sludge moisture content for 89% in sludge to be processed, during pre-dehydration
Polyacrylamide is added；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 15bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of polyacrylamide is 2.0kg/T dewatered sludge, and the additional amount of primary sludge is sludge after pre-dehydration
The 40% of amount, flocculant are ferric trichloride and lime, and the additional amount of ferric trichloride is 160kg/T dewatered sludge, and lime consumption is
252kg/T dewatered sludge；Rotary drum rotation speed is 5.5rad/min in drum concentration machine.
The moisture content for finally measuring sludge after plate compression is 61%, and capillary water absorbing time (CST) 102s, sludge is in block
Shape does not glue filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 26%, and the solid recovery rate of dewatering system is 86%.
Comparative example 3
(1) use drum concentration machine pre-dehydration to sludge moisture content for 89% in sludge to be processed, during pre-dehydration
Polyacrylamide is added；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 15bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of polyacrylamide is 2.0kg/T dewatered sludge, and the additional amount of primary sludge is sludge after pre-dehydration
The 40% of amount, flocculant are lime slurry, and the concentration of lime slurry is 12%, and dosage is 2100kg/T dewatered sludge；Drum concentration
Rotary drum rotation speed is 5.5rad/min in machine.
The moisture content for finally measuring sludge after plate compression is 58%, and capillary water absorbing time (CST) 109s, sludge is in block
Shape does not glue filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 27%, and the solid recovery rate of dewatering system is 85%.
Comparative example 4
(1) use drum concentration machine pre-dehydration to sludge moisture content for 89% in sludge to be processed, during pre-dehydration
Polyacrylamide is added；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 15bar, plate compression dehydration obtains mud cake.
Wherein, the additional amount of polyacrylamide is 2.0kg/T dewatered sludge, and the additional amount of primary sludge is sludge after pre-dehydration
The 10% of amount, flocculant are lime slurry, and the concentration of lime slurry is 12%, and dosage is 2100kg/T dewatered sludge；Drum concentration
Rotary drum rotation speed is 5.5rad/min in machine.
The moisture content for finally measuring sludge after plate compression is 68%, and capillary water absorbing time (CST) 127s, sludge is in block
Shape does not glue filter cloth；It is dried through 2 days room temperature, moisture content of the cake drops to 33%, and the solid recovery rate of dewatering system is 87%.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of mud dewatering method, which comprises the following steps:
(1) it is 85~90% by sludge pre-dehydration to be processed to sludge moisture content, polyacrylamide is added during pre-dehydration；
(2) primary sludge is added into the sludge after pre-dehydration and mixes, obtains mixing sludge；
(3) flocculant is added into the mixing sludge and carries out flocculation reaction；
(4) for the sludge after flocculating under the pressure of 12~20bar, filter-press dehydration obtains mud cake.
2. mud dewatering method according to claim 1, which is characterized in that in the step (2), the addition of primary sludge
Amount is 30~50% of sludge quantity after pre-dehydration, it is preferred that the additional amount of primary sludge is 35% of sludge quantity after pre-dehydration.
3. mud dewatering method according to claim 1 or 2, which is characterized in that in the step (1), polyacrylamide
Additional amount be 0.5~4kg/T dewatered sludge, it is preferred that the additional amount of polyacrylamide be 2.5kg/T dewatered sludge.
4. mud dewatering method according to claim 1-3, which is characterized in that in the step (1), pre-dehydration
It is carried out in drum concentration machine.
5. mud dewatering method according to claim 1-4, which is characterized in that in the step (3), flocculant
For ferric trichloride and lime slurry, wherein the additional amount of ferric trichloride is 155~175kg/T dewatered sludge, lime slurry additional amount
For 1500~3750kg/T dewatered sludge.
6. mud dewatering method according to claim 1-4, which is characterized in that in the step (4), in sheet frame
Filters pressing is carried out in filter press.
7. a kind of sludge dewatering treatment system, including sludge condensation processing unit and plate compression dewatering unit, which is characterized in that
Sludge condensation processing unit, including, sequentially connected excess sludge reservoir, drum concentration machine and mixing sludge reservoir,
Described in mixing sludge reservoir be also connected with primary sludge transfer pipeline；Plate compression dewatering unit, including, flocculation tank and
Its plate and frame filter press being connected, wherein the flocculation tank is also connected with lime slurry transfer pipeline；And the flocculation is instead
Pond is answered also to be connected with the mixing sludge reservoir.
8. sludge dewatering treatment system according to claim 7, which is characterized in that the excess sludge reservoir and rotary drum are dense
It is additionally provided with tube mixer I between contracting machine, is additionally provided with tubular-mix between the mixing sludge reservoir and flocculation tank
Device II.
9. sludge dewatering treatment system according to claim 8, which is characterized in that the tube mixer I is also connected with
PAM transfer pipeline, the tube mixer II are also connected with ferric trichloride transfer pipeline.
10. sludge dewatering treatment system according to claim 9, which is characterized in that the lime slurry transfer pipeline,
PAM transfer pipeline and ferric trichloride transfer pipeline are quenched respectively at lime white liquid pool, the quenched medicament medicine dissolving tank of PAM and ferric trichloride
Medicament medicine dissolving tank is connected.
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