CN104710090B - A kind of pollution-free method for sludge treatment - Google Patents
A kind of pollution-free method for sludge treatment Download PDFInfo
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- CN104710090B CN104710090B CN201510132539.7A CN201510132539A CN104710090B CN 104710090 B CN104710090 B CN 104710090B CN 201510132539 A CN201510132539 A CN 201510132539A CN 104710090 B CN104710090 B CN 104710090B
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Abstract
The invention discloses a kind of pollution-free method for sludge treatment, to solve the low problem of drying sludge degree after the process that traditional sludge processing method exists.It comprises the steps: dilution, absorption, is uniformly mixed in the pending mud diluted as adsorbent using concave and convex rod stone powder, and is sufficiently stirred for, aeration, precipitation, after precipitation, the clear water on upper strata is got rid of, residue dries or dries, and becomes a kind of low-calorie coal.Multiple poisonous and harmful substance in mud and multiple harmful poisonous antibacterial are killed and degrade under the strong oxidation of concave and convex rod stone powder absorption and ozone by the present invention, and by the strong oxidation of ozone, COD (COD) is significantly degraded, COD index in the clear water of process postprecipitation is made significantly to decline, after discharge, the impact on environment is preferably minimized, while decomposing, eliminate the foul smell that mud produces, reach the convenience of mud later-stage utilization and poisonous and hazardous material is completely eliminated.
Description
Technical field
The invention belongs to field of sludge treatment, be specifically related to a kind of method for sludge treatment.
Background technology
China's mud besieged city situation is increasingly severe in the recent period, and within 2010, national mud volume of production is about 2199 ten thousand steres,
Averagely produce 6 ten thousand steres every day, within 2015, estimate that total amount reaches 2615 ten thousand steres, be more than 7 ten thousand steres every day, and these
Mud mostly uses traditional chemical floc such as, and it is heavy that polyacrylamide, aluminium polychlorid etc. carry out after water process
Shallow lake mud, this precipitating sludge cannot be dried the most voluntarily when being dried to water content about 80%, due to these chemical flocculations
The reason of agent, now the surface of mud presents a kind of gel, causes mud to become a kind of semi-fluid material, is i.e. difficult to landfill
Being difficult to again utilize, if directly utilized by such mud, one is very inconvenient transport, and handling difficulty is trickled in transport everywhere,
Even if two is to join in boiler with coal mixed combustion also in that water content causes the most greatly the low burning of fire box temperature insufficient,
Causing poisonous and harmful substance content height in the gas of post combustion emission, harm big, three is that this type of mud presents moist picture drip
The semifluid of blue or green the same state, i.e. contains various bacteria and stinks to high heaven again, the most impacted as far as the place that 5-10 kilometer is remote, makes
Complaints are heard everywhere for surrounding resident.Four is to be inconvenient to fill, and can not decompose voluntarily in continuing to pollute ambient condition after landfill；Inconvenient again
Dry in the sun, can not be dried rapidly when dry in the sun.
Conventional approach before this mud is the way utilizing and additionally applying high temperature, carries out high temperature drying by force, expends
The energy is huge, and cost is high.But do not carry out high temperature drying can not be dried voluntarily again, process to the later stage and utilization brings the most tired
Difficulty, is a great problem.
The method major part processing mud at present remains the many chemical substances of addition and chemical drugs, or uses high temperature
Residue after the processing mode of high pressure, and process can not all be utilized.
Summary of the invention
It is an object of the invention to provide a kind of pollution-free method for sludge treatment, to solve the existence of traditional sludge processing method
Process after the low problem of drying sludge degree.
A kind of pollution-free method for sludge treatment, it comprises the steps:
A, dilution: pending mud is added water and is diluted to high concentration liquid,
B, absorption: be uniformly mixed in the pending mud diluted as adsorbent using concave and convex rod stone powder, and
It is sufficiently stirred for,
C, aeration: again ozone gas is carried out aeration with aeration mode to it,
D, precipitation: aeration precipitates after stopping, getting rid of the clear water on upper strata after precipitation, and residue carries out drying or shining
Dry.
Preferably, the addition of described adsorbent accounts for the 5-30% of the sludge volume not adding clear water.
Preferably, described adsorbent attapulgite stone powder be originate from Baiyin Region, Gansu Province and Linze area soil Red recessed
Convex rod Ore is 20-60 mesh through the tcrude ore powder, granule degree pulverized, screen.Employing attapulgite powder can as adsorbent
To solve the problem that after using traditional chemical flocculant, mud can not be dried voluntarily, the mud after process can be made to be dried to voluntarily
The lowest state of water content, forms the solid being dried and easily transports, and becomes the use of a kind of low-calorie coal.
Preferably, described step A dilution uses clear water or the (regeneration of middle water adding 1-2 times at pending mud
Water).
Preferably, described step B whipping process is, uses low pressure centrifugal sludge pump to be regulated by frequency-variable controller, pump
Output runoff investigation scope be 30-300 cubic meter per hour.This be according to sedimentation tank volume be 300-1000 cubic meter design
, large-scale sedimentation tank proportionally amplifies.Can also the later stage of sewage disposal mud be high concentration can with flow regime time
(the most just need not add clear water) is directly added into attapulgite powder.If frequency-variable controller selects level Four motor, then rotating speed
For 100-1500 r/min.
Preferably, described step C aeration method is to use common aerator to use with ozonator cascade,
In the front end of aerator by ozonator output ozone gas, the manufacture source of ozone can use normal air, also
Can use pure oxygen manufacture, carry out aeration in ozone gas mode, aeration time is 4-12 hour, and its effect is significantly to kill
Various bacteria of going out carries out disinfection and many kinds of substance in Strong oxdiative mud reduces the index of COD, chemical decomposition flocculant, simultaneously
Significantly eliminate the foul smell of mud, make mud be finally reached environmentally safe state, in order to secondary utilizes.
The present invention utilizes the attapulgite that produced from Gansu Province as adsorbent, will affect the chemical flocculation of maximum in original mud
The colloid of agent adsorbs, and the mud being mixed with attapulgite powder carries out by the way of ozonation aerated dividing of Strong oxdiative
Solve, to the multiple poisonous and harmful substance in mud and multiple harmful under the strong oxidation of concave and convex rod stone powder absorption and ozone
Toxic bacteria is killed and degrades, and is carried out COD (COD) significantly by the strong oxidation of ozone
Degraded, makes COD index in the clear water of process postprecipitation significantly decline, and after discharge, the impact on environment is preferably minimized, and is decomposing
While eliminate mud produce foul smell, reach the convenience of mud later-stage utilization and poisonous and hazardous material be completely eliminated.
Processing method of the present invention is omnidistance green method, refers to the material that added when processing mud and employing
Technical scheme and the overall process of process, be all smelly without natural materials and the gaseous matter that can automatically disappear of any pollution to environment
Oxygen, the ozonation aerated mode used in processing procedure is not affected by ambient temperature and amount of sludge size, is only original
Sedimentation tank inside carry out, the poisonous and harmful substance in mud, bacterial virus and foul smell are completely eliminated after processing is completed, pass through
The mud processed can dry or dry the solids in dry water content below 50% automatically, over time
Elapse its water content and can automatically drop to lower state, form the solids being dried especially, containing substantial amounts of in this solids
The material that can burn, can be considered as a kind of low-calorie coal, similar in appearance to brown coal, solves traditional mud because of useization
Learn the difficult problem that can not be dried voluntarily of reason for flocculant, and the ozone used itself is in atmosphere can the spy of automatic classifying
Property (ozone manually utilizing high-tension electricity manufacture can be transformed into the most again common oxygen through half-hour period in atmosphere), and
And dried residue has completely eliminated foul smell, i.e. facilitate transport to be also convenient for using, more convenient deposit, because water content
The lowest, furnace temperature will not be made to reduce when putting in the boiler with coal mixed combustion, be also easy to pyrolytic.Achieve from adding absorption
Agent to the sterilization after processing procedure, reduce COD, eliminate foul smell, to residue all of overall process be all that environmental protection is green
Color.
The analysis and research of the Gansu product Attapulgite Clay Minerals that, the present invention uses are as follows:
1. attapulgite (Attapulgite) has another name called Paligorskite or Palygorskite (Palygorskite), refers to concavo-convex
Rod stone (attapulgite) is a kind of clay mineral of key component.Attapulgite is under the jurisdiction of meerschaum on mineralogy classification
Race, for a kind of crystalloid hydrous magnesium aluminium silicate mineral.Be a kind of layer of chain structure containing Shuifu County's zeopan clay mineral.
Its preferable molecular formula is: (Mg, Al, Fe) 5Si8O20 (HO) 2 (OH2) 4.4H2O, theoretical chemistry composition is: SiO2
Account for 56.96%；(Mg, Al, Fe) O accounts for 23.83%；H2O accounts for 19.21%.
Attapulgite clay (another name attapulgite clay, bleaching earth, hargil, palygorskite etc.) has special fibre structure, difference is sought
Normal colloid and absorption property, have a wide range of applications field, has the good reputation such as " kings of thousand soil ", " soil of general-purpose ", originates from sweet
The attapulgite ore of respectful province is soil Red, can directly eat directly as the medicine controlling diarrhoea, be different from the recessed of other area
Convex rod mineral, explored reserves account for the 79%(more than 1,000,000,000 tons of whole world gross reserves), therefore the most cheap, and mineral bury
Hiding shallow is much all the outdoor mineral exposing earth's surface, is particularly easy to exploitation, pulverizes and screening is particularly easy to, easily transport, because of
This use cost is extremely low.
The purposes of the most convex rod stone: the purposes of attapulgite has more than 2,000 kinds, is mainly used in vegetable oil and fat refining, molecular sieve
The anti-salt of carrier, energy-saving building material, oil drilling, the mud raw material of high temperature resistance.
Attapulgite have the regal title of thousand soil, has special purpose in industry and other multiple industry.Decolouring and
Water processes: the attapulgite clay goods after processing are that ideal adsorbent, food processing help
Agent and food additive, may replace activated carbon.It can not only decolour, also can deodorization taste removal, removing heavy metals ion and
Carcinogen, also has certain selectivity, and this just provides convenience for production, it can make deodorant for refrigerator, sewage-treating agent,
Household water filter, oil and fat refining decolorising agent, effect is extremely obvious, pharmaceutically can make the filler of medicine, carrier, additive, glue
Knot agent, we use this concave and convex rod stone powder originated from Gansu Province as sorbent treatment mud, make use of this just
The feature of attapulgite, uses and achieves good effect in field of sludge treatment.
Two, aeration and ozonation aerated be analyzed as follows:
2.1 common aerations are methods conventional in sewage disposal, are the air using pressurization, the most lacunary by having
Aeration head adds substantial amounts of air to water body, decomposes the poisonous and harmful substance in water body with the oxygen in air, but in air
Oxygen content less, the most only 21%, so oxidation effectiveness is poor.
2.2 we be that common sewage aeration method is applied to field of sludge treatment, first mud is diluted in fluid
State, it is simply that create conditions for aeration, makes this aeration can spray tiny air in mud liquid after dilution
Bubble, we use made ozone, this kind of ozone to have extremely strong redox reaction ability, can quickly kill liquid
In various bacteria, decompose the multiple poisonous and harmful substance in water body simultaneously, reduce the index of COD, it is also possible to eliminate rapidly
Foul smell, ozonator has been ripe technology, has multiple product available.
2.3 can use, according to different sludge qualities, the ozone that air manufactures, it is possible to use pure oxygen manufactures ozone,
The present invention uses the ozone of pure oxygen manufacture to be the inlet end input pure oxygen manufacture ozone at ozonator, this kind of ozone content pole
Up to absolutely, so sterilization, deodorization degraded COD works very well, have the ozone gas ease of some trace in processes
Go out in air, but the ozone of this artificial electric power law manufacture is different from the ozone that vehicle exhaust produces, made smelly
Oxygen quickly selfdecomposition can become common oxygen, the longest holdup time less than within 30 minutes, resolving into common oxygen the most voluntarily, and
Ozone in vehicle exhaust is the gas polluting environment, can not automatically eliminate easily, and two kinds of ozone character are different.
2.4 by above-mentioned simple technique, can significantly reduce the cost of Treatment of Sludge, and dirt after treatment
Mud does not only have antibacterial and poisonous and harmful substance, and does not has odor pollution environment, after such process, and the character of mud
Also there occurs and greatly change, the problem can not will not being dried at a kind of colloid of format surface when being dried voluntarily, can be voluntarily
It is dried to water content less than 50%, even lower, not only facilitate transport but also facilitate secondary to utilize, attapulgite powder price is extremely low simultaneously,
Enormous amount again, lays a good foundation for penetration and promotion technique.Be applicable to industrial sludge, municipal sludge, chemical engineering sludge and from
Carry out the mud after the water process of water factory.
Detailed description of the invention
The following examples can further illustrate the present invention, but limits the present invention never in any form.
In embodiment, frequency-variable controller is for being purchased existing product.
1. 1 kinds of pollution-free method for sludge treatment of embodiment, comprise the steps:
A, dilution: pending mud adding its clear water of 2 times and is diluted to high concentration liquid, the addition of adsorbent accounts for
Do not add clear water sludge volume 15%；
B, absorption: be uniformly mixed into by adsorbent in the pending mud diluted, and be sufficiently stirred for, use
Low pressure centrifugal sludge pump is regulated by frequency-variable controller, and the output runoff investigation scope of pump is 100 cubic metres per hour.Frequency conversion
Controller is level Four motor, and rotating speed is 100 r/min;
Adsorbent attapulgite stone powder is to originate from Baiyin Region, Gansu Province and the soil Red Attapulgite Clay Minerals warp in area, Linze
Cross pulverizing, the tcrude ore powder, granule degree of screening is 60 mesh；
C, aeration: again to it, ozone gas is carried out aeration with aeration mode, sent out by ozone in the front end of aerator
Raw device output ozone gas, aeration time is 12 hours.
D, precipitation: aeration precipitates after stopping, getting rid of the clear water on upper strata after precipitation, and residue carries out drying or shining
Dry.
2. 1 kinds of pollution-free method for sludge treatment of embodiment, comprise the steps:
A, dilution: pending mud adding its middle water of 1 times and is diluted to high concentration liquid, the addition of adsorbent accounts for
Do not add clear water sludge volume 5%。
B, absorption: be uniformly mixed into by adsorbent in the pending mud diluted, and be sufficiently stirred for, use
Low pressure centrifugal sludge pump is regulated by frequency-variable controller, and the output runoff investigation scope of pump is 300 cubic metres per hour.Frequency conversion
Controller is level Four motor, and rotating speed is 1000 r/min.
Adsorbent attapulgite stone powder is to originate from Baiyin Region, Gansu Province and the soil Red Attapulgite Clay Minerals warp in area, Linze
Cross pulverizing, the tcrude ore powder, granule degree of screening is 40 mesh；
C, aeration: again to it, ozone gas is carried out aeration with aeration mode, sent out by ozone in the front end of aerator
Raw device output ozone gas, aeration time is 8 hours.
D, precipitation: aeration precipitates after stopping, getting rid of the clear water on upper strata after precipitation, and residue carries out drying or shining
Dry.
3. 1 kinds of pollution-free method for sludge treatment of embodiment, comprise the steps:
A, dilution: by pending mud
B, adding its clear water of 1 times and be diluted to high concentration liquid, the addition of adsorbent accounts for the sludge volume not adding clear water
30%；
C, absorption: be uniformly mixed into by adsorbent in the pending mud diluted, and be sufficiently stirred for, use
Low pressure centrifugal sludge pump is regulated by frequency-variable controller, and the output runoff investigation scope of pump is 30 cubic metres per hour.Frequency conversion
Controller is level Four motor, and rotating speed is 1500 r/min.
Adsorbent attapulgite stone powder is to originate from Baiyin Region, Gansu Province and the soil Red Attapulgite Clay Minerals warp in area, Linze
Cross pulverizing, the tcrude ore powder, granule degree of screening is 20 mesh；
D, aeration: again to it, ozone gas is carried out aeration with aeration mode, sent out by ozone in the front end of aerator
Raw device output ozone gas, aeration time is 4 hours.
D, precipitation: aeration precipitates after stopping, getting rid of the clear water on upper strata after precipitation, and residue carries out drying or shining
Dry.
Make the application example of the sewage treatment plant from the beginning of use-case Baiyin City, gansu Province:
Inherently there are three sedimentation tanks in sewage treatment plant, and the volume of the first sedimentation tank is 500 cubic metres, in this sedimentation tank
Install additional one per hour flow be the sludge pump of 200 cubic metres, tilting is installed, and control mode is variable frequency adjustment mode, water outlet
Amount can be adjusted as required, is adjusted such that the water body of whole sedimentation tank slowly rotates, and this sedimentation tank is provided with exposure
Air pump, the leading portion in aeration head air inlet pipe installs an ozonator producing 20 cubic metres per hour, the ozone that will produce
It is input in aeration air inlet pipe.And former aeration pressure is reduced to original 1/5, on former aerator motor
Install a frequency-variable controller additional, be adjusted such that aeration head is in slowly discharging bubble regime by frequency-variable controller.
After the rotation aeration of 8 hours, stop sludge pump and rotate, stop the aeration of aeration head, make the first sedimentation tank certainly
Moving and precipitate, emitted by the clear water on top after precipitating 2-4 hour, summer, the mud of bottom presented under the irradiation of the sun
Gradually drying regime, just as bottom dry riverbed, carries out natural evaporation and is dried winter, and mud is dried to moisture voluntarily and contains
Amount less than 50%, in dry, the solid of clean odorless, the most just can be dug out utilization, do impermeable the most as before
?.
This method can also transform remaining two sedimentation tank, makes this kind of Treatment of Sludge of three carrying out that sedimentation tank moves in circles
Mode, is fully solved a mud difficult problem.
Claims (6)
1. a pollution-free method for sludge treatment, it is characterised in that it comprises the steps:
Dilution: pending mud is added water and is diluted to high concentration liquid,
Absorption: be uniformly mixed in the pending mud diluted as adsorbent using concave and convex rod stone powder, and fill
Divide stirring,
Aeration: again ozone gas is carried out aeration with aeration mode to it,
Precipitation: aeration precipitates after stopping, getting rid of the clear water on upper strata after precipitation, and residue dries or dries;Institute
State adsorbent attapulgite stone powder be originate from Baiyin Region, Gansu Province and Linze area soil Red Attapulgite Clay Minerals through pulverizing,
The tcrude ore powder, granule degree of screening is 20-60 mesh.
2. the method for claim 1, it is characterised in that: the addition of described adsorbent accounts for the sludge volume not adding clear water
30%.
3. the method for claim 1, it is characterised in that: dilution uses and adds 1-2 times in pending mud
Clear water or middle water.
4. method as claimed in claim 3, it is characterised in that: whipping process is, uses low pressure centrifugal sludge pump by becoming
Frequently controller regulation, the output runoff investigation scope of pump is 30-300 cubic meter per hour.
5. method as claimed in claim 4, it is characterised in that: described frequency-variable controller is level Four motor, and rotating speed is 100-
1500 r/min。
6. method as claimed in claim 5, it is characterised in that: aeration method is to be occurred by ozone in the front end of aerator
Device output ozone gas, aeration time is 4-12 hour.
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| CN201510132539.7A CN104710090B (en) | 2015-03-25 | 2015-03-25 | A kind of pollution-free method for sludge treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7309432B1 (en) * | 2006-09-29 | 2007-12-18 | Praxair Technology, Inc. | System and method for eliminating sludge via ozonation |
| CN103539326B (en) * | 2013-09-30 | 2016-03-09 | 珠海市伟力高生物科技有限公司 | A kind of Method for comprehensive treatment of sludge |
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