CN103130393B - Sludge drying processing method and system - Google Patents

Sludge drying processing method and system Download PDF

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Publication number
CN103130393B
CN103130393B CN201310089531.8A CN201310089531A CN103130393B CN 103130393 B CN103130393 B CN 103130393B CN 201310089531 A CN201310089531 A CN 201310089531A CN 103130393 B CN103130393 B CN 103130393B
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mummification
mud
sludge drying
chamber
air
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CN103130393A (en
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王兢
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Lianzhi Tongda Suzhou Environmental Technology Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

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  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a sludge drying processing method and system. The method comprises the following steps of: dividing the sludge into thin layers in a horizontal direction with a sludge coater and paving; putting the sludge divided into thin layers on an interlayer, drying in a sludge drying room with normal-temperature low-speed air, removing dust and odor in the dried air discharged out of the drying room so as to purify the dried air and then conducting environment-friendly discharge, carrying out the heat energy application and of the dried sludge on the dried sludge and making ceramic granules so as to realize comprehensive utilization. The method realizes sludge drying with lower operation cost, a medicine is not added in the drying process, external heat source is not used, no secondary pollution is generated, and the sludge is reduced and recycled harmlessly.

Description

Sludge drying processing method and system
Technical field
The present invention relates to the method and system that a kind of sludge drying is processed, particularly a kind ofly take the dewatered sludge method and system that normal temperature velocity air is mummification medium.
Background technology
Along with the acceleration of industrialization, urbanization paces, the sewage load of China is increasing, and corresponding sludge creation amount increases sharply." 12 " planning sewage year treatment capacity will reach 500 billion cubic meters, approximately 4,000 ten thousand tons of corresponding mud (water ratio 80%) year generations; To the year two thousand twenty, expectation China sludge yield will be broken through 6,000 ten thousand tons of years.So far, most of mud is not dealt carefully with, secondary pollution outstanding problem.
The common sludge treatment disposal technology route of China has landfill, compost, burning, and mud conventionally will be through the transportation of longer distance before entering these to process disposal link.No matter take which kind of technological line, what first will solve is sludge drying, particularly moisture is reduced to and is less than 30% after realizing minimizing, is convenient to transportation and also reduces the pressure that Liao Hou road is processed, and also helps thermochemistry disposal technologies such as adopting burning, pyrolysis.
Domestic and international many mechanisms and individual have carried out a large amount of research and development aspect sludge drying, and have made some progress.At present, sludge drying main technological route has heat drying (steam, hot blast, flue gas), mechanical mummification (press filtration, centrifugal), solar energy desiccation etc.Heat drying speed is fast, effective, adopts the primary energy source such as steam, hot blast, and energy consumption is larger, adopts flue gas to have certain influence to heat energy system.Machinery mummification need to add medicament conventionally in mud, and medicament can bring the increase of sludge quantity and the processing of Hui Duihou road to bring disadvantageous effect, and more disadvantageously mechanical mummification conventionally can not be reduced to moisture below 50% in the situation that making with medicament.Solar energy desiccation floor space is large, and inefficiency is subject to weather effect larger, and suitable application region is limited.
Chinese patent 201010221730.6 discloses a kind of sludge air drying method and system, and concrete measure is: in vertical or horizontal tower-shaped housing, utilize sewage work to dry up mud for the Aeration fan of aeration and biological reaction tank oxygen supply.For realizing the another kind of sludge air drying method of the object of the invention, concrete measure is: in hyperbola or similar hyperbola high tower, utilize natural wind to dry up mud.In said vertical or horizontal tower-shaped housing and in hyperbola or similar hyperbola high tower, airheater is set.This invention need to utilize the Aeration fan of sewage work, use and limited to, and mud is to be deposited in Ta Nei to contact and be difficult to less mummification with air.In hyperbola or similar hyperbola high tower, airheater is set, has used outer thermal source, running cost is higher.
Chinese patent 201110414321.2 discloses a kind of method of residual active sludge Quick-air-drying, comprise in the residual active sludge of collecting and add milk of lime, by residual active sludge be modulated into can flowable state slurries, being placed in reaction tank spends the night, after the water in residual active sludge and entozoa oophyte thereof is fully oozed out, add raising agent residual active sludge is stirred evenly into distiller's yeast shape, then with thin layer, be laid in air-drying box (chamber), stir, ventilate, continuous service to the water content of active sludge is down to 30-40%.This patent need to be added medicament to mud, and water ratio can only be reduced to 30-40%.
Chinese patent 200910192763.X discloses a kind of sludge filter cake aerobic air drying method and device, mainly comprises that sludge filter cake fragmentation is dispersed into mud granule layer, to malleation in slow motion or the mud granule layer that stirring, sends into certain temperature dry air; To slow motion or the mud granule that stirring carries out physics or chemical sterilization is processed; Outside mud granule layer, negative pressure is extracted tail gas discharge after washing of having carried sludge water content out; Utilize screw machine that dried mud granule is further pulverized in the process of carrying; Reach the requirement to recycling.This patent need to use cool-heat-exchanger and compressor obtains hot dry air, and raw material is the filter cake through press filtration.
Summary of the invention
The method for sludge treatment and the system that the object of this invention is to provide a kind of normal temperature velocity air mummification that can suitability for industrialized production, do not add medicament, with less cost, better simply system, effectively realize sludge reduction, mode with comprehensive utilization is given full play to the energy and the resource that mud is contained, and realizes the impact of environment minimum simultaneously.
For achieving the above object, the present invention is usingd normal temperature air as mummification medium, adopt unique multi-thin-layer to pave mud in conjunction with multidirectional air flow design, mud fully brushes at the indoor air that is subject to of air mummification, effect due to psychrometric difference and pressure difference, moisture high-efficiency evaporating, the quick mummification of mud.
The method that sludge drying of the present invention is processed comprises:
1), wet mud is paved on multi-compartment bed mud plate by the mud coating machine layering in sludge drying treatment system, paving mud plate in horizontal direction a minute multilayer be held on sludge drying car;
2), the sludge drying car that paving mud plate is housed is sent into described sludge drying chamber, adopt blower fan to promote mummification indoor air flows, realize sludge drying, different in the indoor residence time of air mummification according to sludge drying car, sludge drying can be less than to 10% to water ratio at most;
3), the mummification air extracted out from sludge drying chamber is imported into decontamination chamber, carries out dedusting, deodorizing is processed, mummification purifying air is outer row after processing and filtering, meets the national environmental requirement of being correlated with;
4) mud (i.e. dry mud), after mummification can directly be used as fuel, for boiler, kiln burning or pyrolysis, carries out heat energy utilization; Or through grinding, balling-up, in calcining kiln, sinter haydite into; High-temperature flue gas can be used for accelerate sludge mummification, realizes resource, comprehensive utilization of energy.
Further, described mummification air cleaning method is selected from one or both the combination in WATER-WASHING METHOD and cyclonic separation method; The method of described deodorizing is selected from one or more the combination in chemical deodorizing method, active carbon adsorption, activation process, adsorption by soil method.
The present invention also proposes the system that a kind of sludge drying is processed, comprise coating machine, sludge drying car, sludge drying chamber and mummification air purifying room, described coating machine minute is placed on described sludge drying car for mud being paved into after thin layer, described sludge drying chamber is normal temperature velocity air mummification chamber, for mummification, is placed in the mud on described sludge drying car; The purifying treatment that described mummification air purifying room is carried out dedusting deodorizing for the mummification air that described sludge drying chamber is discharged, and the air after purifying treatment is discharged by pipeline.
Further, described mummification air purifying room comprises water mist dust-removing chamber and chemical deodorizing chamber, the indoor spray equipment that is respectively arranged with of described water mist dust-removing chamber and chemical deodorizing, and described chemical deodorizing chamber further comprises acid solution deodorization chamber * winding paper and alkali lye deodorization chamber * winding paper.
Described mummification air purifying room also comprises the activated carbon adsorption bed that the air after purifying is carried out to adsorption treatment.
Described mud coating machine comprises the feed bin that puts mud, inductive switch and by the mud lamellar coated panel that paves.
Described sludge drying chamber comprises the sealing mummification chamber that one or more levels are arranged in juxtaposition or vertical multi-layer is arranged.
Also comprise and place the paving mud plate that is processed into thin layer mud through described mud coating machine, on described paving mud plate, be provided with mesh.
Compared with prior art, the present invention has (1) without adding medicament, without external heat source, sludge drying is less than to 10% to water ratio; (2) energy containing of mud fully retains, and can further realize recycling; (3) can process wet mud, also can process other wet stocks, particularly drying rate be there is no the wet stock of particular requirement, as wet wood chip, corn cob slag, the dregs of a decoction, manioc waste, bagasse, mud coal, mineral aggregate etc.
Accompanying drawing explanation
Fig. 1 is the schema of sludge drying processing method of the present invention;
Fig. 2 is the concrete schema of Fig. 1.
Fig. 3 is the structural representation of sludge drying treatment system of the present invention.
Wherein in figure, element numbers is:
Mud coating machine 1; Sludge drying car 2; Normal temperature velocity air mummification chamber 3; Water mist dust-removing chamber 4; Chemical deodorizing chamber 5; Activated-charcoal filter bed 6; Haydite nodulizer 7; Haydite calcining kiln 8; Feed bin 11; Inductive switch 12; Coated panel 13; Paving mud plate 21; Gas blower 31; Gas blower 32; Induced draft fan 33; Water mist sprinkling device 41; Nozzle 42,52,57; Tank 43,53,58; Settling tank 44,54,59; Induced draft fan 45,55,61; Alkali lye spray equipment 51; Acid solution spray equipment 56.
Embodiment
Below in conjunction with accompanying drawing of the present invention, the technical scheme of the embodiment of the present invention is carried out to clear, complete description.
Shown in Fig. 1~3, disclosed sludge drying treatment system, it processes by take the indoor sludge drying that carries out of sludge drying that normal temperature velocity air is mummification medium the object that reaches sludge drying, comprise mud coating machine 1, paving mud plate 21, sludge drying car 2, sludge drying chamber 3, as the water mist dust-removing chamber 4 and the chemical deodorizing chamber 5 that purify mummification air purifying room, and filtration unit 6.Described coating machine 1 comprises feed bin 11, inductive switch 12, coated panel 13 from top to bottom, and coated panel 13 joins with paving mud plate 21.Described feed bin 11 is for accommodating mud, and inductive switch 12 is for controlling when the mud of feed bin 11 reaches preset value, and the coated panel 13 that starts coating machine 1 starts to pave, paving mud plate 21 for lamellar that mud is paved to spreading mud plate 21.Coating machine 1 is by up and down or move left and right, and circular-rotation is by the mud lamellar that paves, and is layed on mud plate 21, and the thickness of thin layer mud be take 0.5~5cm as good.
On the bottom surface of described paving mud plate 21, be provided with mesh (not shown), mud is separated into the fritter that is greater than mesh, and the surrounding of bottom surface is formed with mud guard (not shown) to upper process.Paving mud plate 13 directly horizontal positioned to sludge drying car 2, also can on sludge drying car 2, be provided with multilayer baffle 22 from top to bottom, baffle spacing be take 2-20cm as good, paving mud plate 13 can horizontal positioned to baffle 22, and the periphery of sludge drying car is provided with vertical baffle (not shown).
The normal temperature velocity air mummification chamber that described sludge drying chamber 3 is sealing, for the mud on accommodating sludge drying car 2 mummification mummification car 2, the sidewall of sludge drying chamber 3 and top are separately installed with gas blower 31,32, described gas blower can be selected from centrifugal blower, aerofoil fan or roots blower, its wind direction comprises level and downward direction, described sludge drying chamber 3 comprises one or more, and a plurality of mummification chamber can level be arranged in juxtaposition, or vertical multi-layer is arranged.Induced draft fan 33 is equipped with in the air outlet of sludge drying chamber 3, described sludge drying car 2 in mummification chamber 3 interior can shift position or transposing direction be beneficial to the drying process of mud.
Described water mist dust-removing chamber 4 joins by the air outlet of pipeline and mummification chamber 3, for the gases of 3 derivation from mummification chamber are carried out to dust removal process.In water mist dust-removing chamber 4, be provided with water mist sprinkling device (or spray column) 41, spraying nozzle 42 is equipped with on water mist sprinkling device top, and tank 43 and settling tank 44 are arranged at bottom, and induced draft fan 45 is equipped with in air outlet.
Described chemical deodorizing chamber 5 joins by the air outlet of pipeline and described water mist dust-removing chamber 4, chemical deodorizing chamber 5 comprises alkali lye spray chamber and acid solution spray chamber, in the present embodiment with alkali lye spray chamber formerly, acid solution spray chamber rear be example explanation, alkali lye spray chamber and acid solution spray chamber are respectively equipped with alkali lye spray equipment (or spray column) 51, and acid solution spray equipment 56, nozzle 52 is equipped with on alkali lye spray equipment 51 and acid solution spray equipment top, 57, bottom is respectively equipped with tank 53, 58 and settling tank 54, 59, 52, the nozzle of alkali lye spray chamber settling tank 54 and acid solution spray equipment 56 is connected by induced draft fan 55 and pipeline, and the settling tank 58 of acid spray chamber is connected with filtration unit 6 by pipeline.
In the present embodiment, described filtration unit 6 is activated-charcoal filter beds, in order to absorption, remain in the airborne stink of mummification after purification, mummification air is disposed in atmosphere via induced draft fan 61 again, thereby has reduced the gas pollution on the environment that mud drying process produces.
In addition, sludge drying treatment system of the present invention also can connect haydite nodulizer 7 and haydite calcining kiln 8, for the mud after mummification is further made to haydite, and the energy that haydite calcining kiln 8 mainly utilizes mud to contain, insufficient section adopts biomass renewable energy source.Haydite calcining kiln is arranged near sludge drying chamber, and dewatered sludge is fired into haydite from mummification chamber nearby out, to realize resource, comprehensive utilization of energy.
The process that sludge drying of the present invention is processed comprises: mud is shared and is paved into thin layer; By paving, drying and other treatment is carried out in the mummification under the air of normal temperature low speed of lamellar mud; And mummification gas is carried out to the step of discharging after purifying treatment, specifically comprise:
Wet mud is sent hopper 11 to by e Foerderanlage (not shown), running up to a certain amount of rear inductive switch 12 opens, coated panel 13 is applied to a certain amount of mud on paving mud plate 21 and mud is divided into fritter, by artificial or automated installation, paving mud plate 21 is delivered on the baffle 22 of sludge drying car 2.Next, the mummification car 2 of placing paving mud plate 21 is admitted to normal temperature velocity air mummification chamber 3, open gas blower 31 and top gas blower 32 on the side wall of mummification chamber, mud is subject to multidirectional air and fully brushes in air mummification chamber 3, due to the effect of psychrometric difference and pressure difference, moisture high-efficiency evaporating, the quick mummification of mud, different in the indoor residence time of air mummification according to sludge drying car, sludge drying can be less than to 10% to water ratio at most.
Mummification air is extracted out and is sent into water mist dust-removing chamber 4 by closed conduit by induced draft fan 33, spraying nozzle 42 ejection water smokes on water mist sprinkling device 41 in water mist dust-removing chamber 4, the airborne dust of mummification is drenched to the tank 43 that falls into bottom, and through settling tank 44 precipitations, induced draft fan 45 through place, air outlet, by pipeline, be connected to chemical deodorizing chamber 5, through the chemical treatment in alkali lye spray chamber and acid spray chamber, the airborne sour gas of mummification and alkaline gas are neutralized in tank 58 and settling tank 59, mummification air connects the residual stink of activated-charcoal filter bed 6 absorption by pipeline, finally by induced draft fan 61 discharge atmosphere.
And after drying and other treatment mud dry mud can directly be used as fuel, for the burning of boiler, kiln or pyrolysis, carry out heat energy utilization; Or through grinding, balling-up, in calcining kiln, sinter haydite into; High-temperature flue gas can be used for accelerate sludge mummification, realizes resource, comprehensive utilization of energy.
Technology contents of the present invention and technical characterictic have disclosed as above; yet those of ordinary skill in the art still may be based on teaching of the present invention and announcements and are done all replacement and modifications that does not deviate from spirit of the present invention; therefore; protection domain of the present invention should be not limited to the content that embodiment discloses; and should comprise various do not deviate from replacement of the present invention and modifications, and contained by present patent application claim.

Claims (5)

1. a sludge drying processing method, is characterized in that comprising the following steps:
Pave lamellar be separated into fritter of the mud layering of wetting;
The lamellar mud of paving is placed in to the indoor normal temperature velocity air drying and other treatment of carrying out of mummification; And
The purifying treatment that the mummification air of discharging from mummification chamber is carried out to dedusting deodorizing;
Wherein, the mud layering of the wetting lamellar method that paves comprises: the mud that will wet paves lamellar to spreading on mud plate by coating machine, by paving mud plate in horizontal direction a minute multilayer be held on sludge drying car, and the mummification of normal temperature velocity air mummification of the sludge drying car that is shelved with mud being sent into sealing is indoor, adopt the multi-direction promotion mummification of blower fan indoor air flows to realize sludge drying; Sidewall and the top of described mummification chamber are separately installed with gas blower, and with generation level and downward wind direction, induced draft fan is equipped with in the air outlet of mummification chamber, described sludge drying car mummification indoor can shift position or transposing direction be beneficial to the drying process of mud.
2. sludge drying processing method according to claim 1, is characterized in that: described mummification air cleaning method is selected from one or both the combination in WATER-WASHING METHOD and cyclonic separation method; The method of described deodorizing is selected from one or more the combination in chemical deodorizing method, active carbon adsorption, activation process, adsorption by soil method.
3. a sludge drying treatment system, it is characterized in that: comprise coating machine, sludge drying car, sludge drying chamber and mummification air purifying room, described coating machine is paved into after thin layer and minute is placed on described sludge drying car for the mud that will wet, comprise the feed bin that puts mud, inductive switch and by the mud lamellar coated panel that paves, described sludge drying chamber is normal temperature velocity air mummification chamber, comprise the sealing mummification chamber that one or more levels are arranged in juxtaposition or vertical multi-layer is arranged, for mummification, be placed in the mud on described sludge drying car; The purifying treatment that described mummification air purifying room is carried out dedusting deodorizing for the mummification air that described sludge drying chamber is discharged, and the air after purifying treatment is discharged by pipeline; Described anhydration system also comprises places the paving mud plate that is processed into thin layer mud through described mud coating machine, on described paving mud plate, is provided with mesh.
4. sludge drying treatment system according to claim 3, it is characterized in that: described mummification air purifying room comprises water mist dust-removing chamber and chemical deodorizing chamber, the indoor spray equipment that is respectively arranged with of described water mist dust-removing chamber and chemical deodorizing, described chemical deodorizing chamber further comprises acid solution deodorization chamber * winding paper and alkali lye deodorization chamber * winding paper.
5. sludge drying treatment system according to claim 4, is characterized in that: described mummification air purifying room also comprises the activated carbon adsorption bed that the air after purifying is carried out to adsorption treatment.
CN201310089531.8A 2013-03-20 2013-03-20 Sludge drying processing method and system Expired - Fee Related CN103130393B (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743199A (en) * 2014-01-24 2014-04-23 王兢 Turning based wet stock drying method and turning based wet stock drying system
CN103755122B (en) * 2014-01-24 2016-05-25 王兢 A kind of sludge drying method and system based on vertical cloth mud
CN103920378B (en) * 2014-05-08 2016-03-09 山东天力干燥股份有限公司 A kind of municipal sludge drying tail gas treating apparatus and method
CN107686111A (en) * 2017-08-23 2018-02-13 无锡绿麦环保科技有限公司 Sludge drying carbonization treatment technique
CN107445446B (en) * 2017-09-22 2019-03-26 西安吉利电子化工有限公司 A kind of dry installation for fermenting of column plate type
CN107989225B (en) * 2017-12-11 2019-09-10 深圳市金鹏建筑装饰工程有限公司 A kind of construction techniques of interior wall

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101205111A (en) * 2007-08-17 2008-06-25 光大环保工程技术(深圳)有限公司 Sludge drying apparatus and sludge drying method using the same
CN101597132A (en) * 2009-06-02 2009-12-09 清华大学 Biological drying method of urban wastewater sludge
CN203144261U (en) * 2013-03-20 2013-08-21 王兢 Sludge drying treatment system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101205111A (en) * 2007-08-17 2008-06-25 光大环保工程技术(深圳)有限公司 Sludge drying apparatus and sludge drying method using the same
CN101597132A (en) * 2009-06-02 2009-12-09 清华大学 Biological drying method of urban wastewater sludge
CN203144261U (en) * 2013-03-20 2013-08-21 王兢 Sludge drying treatment system

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