CN105347645B - The total system and method for a kind of sludge - Google Patents
The total system and method for a kind of sludge Download PDFInfo
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- CN105347645B CN105347645B CN201510728810.3A CN201510728810A CN105347645B CN 105347645 B CN105347645 B CN 105347645B CN 201510728810 A CN201510728810 A CN 201510728810A CN 105347645 B CN105347645 B CN 105347645B
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- 239000010802 sludge Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 99
- 239000004576 sand Substances 0.000 claims abstract description 73
- 238000001035 drying Methods 0.000 claims abstract description 63
- 238000001816 cooling Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000012530 fluid Substances 0.000 claims abstract description 43
- 230000003134 recirculating effect Effects 0.000 claims description 31
- 238000007664 blowing Methods 0.000 claims description 16
- 238000004332 deodorization Methods 0.000 claims description 16
- 238000005243 fluidization Methods 0.000 claims description 15
- 238000004062 sedimentation Methods 0.000 claims description 15
- 230000005587 bubbling Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000012809 cooling fluid Substances 0.000 claims 1
- 230000001877 deodorizing effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 17
- 239000008187 granular material Substances 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000009692 water atomization Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005935 nucleophilic addition reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The total system and method for a kind of sludge, belong to technical field of sludge treatment.The system includes sludge and crushes conveying sprayer unit, vegetation water conveying sprayer unit, the removal of fluid bed sand particle and odor removal, fluidized bed drying cooling device and exhaust gas processing device.Sludge crushing conveying sprayer unit makes the drop that the sludge of the particle containing sand forms 150~200 μm, and mixing drop is uniformly ejected into the removal of fluid bed sand particle and odor removal；By adjusting the size of fluidising air velocity, the purpose that less than 200 μm sand particles are removed from wet mud is realized.The present invention solves sludge because sand factor is high, the problem of causing sludge drying and incineration system and equipment attrition, reduces enterprise operation, maintenance cost；Solve the problems, such as that sludge anhydration burning engineering project place spreads all over foul smell simultaneously, reduce enterprise to drawing smelly, deodorizing device fund input, and realize the continuous drying of sludge, there is good future in engineering applications.
Description
Technical field
The present invention relates to a kind of total system of sludge and method, belongs to the removal of sludge sand grains, deodorization and desiccation skill
Art field.
Background technology
Influenceed by big build with factors such as pipe network imperfections, the content of China's city sewage and sludge sand grains is generally inclined
Height, sand grains distributed architecture also have significantly different with foreign countries, although having introduced substantial amounts of sand setting cell system in recent years, effect is not
Still there is the problem of sand grains forms deposition in aftertreatment systems in optimism, most of sewage treatment plant.At present, sand setting cell system
There is a preferable removal effect more than 200 μm of sand grains to particle diameter, but for the sand grains of 100~200 μm of particle diameter, removal effect is less
Ideal, particle diameter are less than 100 μm of sand grains, and removal efficiency is very low.Setting pot is inefficient, will make it that sludge sand factor is high, easily
Cause the abrasion of sludge drying and incineration system and equipment, serious economic loss is caused to enterprise.Such as certain domestic sewage treatment plant
Sludge treatment system engineering, using fluid bed dryer dewatered sludge, because sludge butt sand factor is higher in operation, Gao Hansha
The sludge of amount makes equipment by abrasion largely under high velocity fluidization state；Specifically it is reflected in for drying machine at the scene
Caused by the tube wall of middle tubing heat exchanger in the top of abrasion, the inwall of spiral separator and the feed distributor rotated at a high speed
The abrasion of wall；Due to the aggravation of heat exchanger abrasion, once caused the drying machine that conduction oil leakage accident, anhydration system repeatedly occurs
Multiple forced outage, the heat exchanger then more renewed.Separately there is the sludge incineration comprehensive utilization cogeneration of heat and power item of certain power ＆ light company
Mesh, using burning in circulating fluid bed boiler sludge, dewatered sludge, coal mixed-fuel burning proportion are up to 1 in operation:1, due to SiO in sludge2Contain
Amount is higher, causes boiler plant wear problem to be present.
Caused foul smell problem is equally very important in sludge drying and afterwards transportation.Sludge after desiccation at present
Generally by equipment such as dewatered sludge belt conveyor, dewatered sludge bucket elevators, it is delivered in dewatered sludge storehouse and is stored, passed through afterwards
The modes such as truck transport, belt conveyor conveying are delivered to coal bunker, and burning is delivered to by fuel delivery system after being mixed with coal
Stove is burned.Whole sludge drying, course of conveying are very long, and it is broad to take place area, dewatered sludge storage time length, convey away from
From remote.In this process, a large amount of foul smell are produced in on-site, serious pollution destroys the working environment of field operator.
Therefore, being respectively provided with negative pressure on the way in sludge bin, conveying, foul smell is drawn with air-introduced machine, waste gas is sent to incinerator burning, or is sent to
Biological filter deodorization system carries out qualified discharge after deodorization.Even if taking these measures, there is sludge anhydration burning engineering item
Purpose place, is still a mass of foul smell everywhere, and a bottleneck for having become restriction sludge anhydration burning future in engineering applications is asked
Topic, it is badly in need of solving.And the cost largely drawn smelly, deodorizing device, also increase enterprise operation buy, arranged, has a strong impact on
The economic benefit of enterprise.
The content of the invention
It is an object of the invention in view of the shortcomings of the prior art and defect, there is provided one kind can realize sludge sand
Grain removal, deodorization and the sludge comprehensive treatment system and method dried.
Technical scheme is as follows：
A kind of total system of sludge, the system include sludge and crush conveying sprayer unit, vegetation water conveying spraying
Device, fluidized bed drying cooling device and exhaust gas processing device, it is characterised in that：The system is also gone including fluid bed sand particle
Remove and odor removal, the sand particle removes contains main fluidized-bed and main cyclone separator with odor removal, in main cyclone separator
Inlet pipeline vegetation water atomizer is provided with inlet pipeline；Middle part in main fluidized-bed is laterally and perpendicular along forward and backward wall surface
To some wet mud atomizers to be liquidated to level are arranged, the wet mud atomizer is crushed by pipeline and described sludge
Convey sprayer unit connection；Top in main fluidized-bed is provided with the main bed vegetation water atomizer of some rows, vegetation water conveying
Sprayer unit is connected by pipeline with main bed vegetation water atomizer and inlet pipeline vegetation water atomizer respectively；In mainstreaming
Bed bottom is disposed with sand particle blowdown pipe and air compartment and air distribution plate；The fluidized bed drying cooling device fluidizes including drying cycles
Bed and cooling recirculating fluidized bed, drying cycles fluid bed are connected with cooling recirculating fluidized bed by intermediate connection pipe, followed in cooling
Ring fluid bed bottom is provided with dewatered sludge blowdown pipe；The bottom of main cyclone separator is provided with Blowing stopper, and the bottom of the Blowing stopper passes through
Wet mud material blanking tube is connected with drying cycles fluid bed；The bottom of drying device cyclone separator and cooling device cyclone separator
Also Blowing stopper is respectively equipped with, the two Blowing stoppers pass through refeed line and drying cycles fluid bed and cooling recirculating fluidized bed phase respectively
Even；The central tube of three cyclone separators is connected by offgas duct with described exhaust gas processing device respectively.
Sludge of the present invention, which crushes conveying sprayer unit, includes micron order disintegrating apparatus and wet mud tank, wet mud tank
Outlet be connected by house steward and branched pipe with described wet mud atomizer, main valve and screw rod are installed on house steward
Pump, sub-valve is installed on each limb.
Sand particle blowdown pipe setting of the present invention is multiple, close above main fluidized-bed front wall bottom, air distribution plate
The position of air distribution plate, and be evenly arranged along the width of main fluidized-bed, the outlet of sand particle blowdown pipe is straight down.
The middle part of drying cycles fluid bed of the present invention is provided with middle demarcation strip, and the dividing plate is divided into bottom connection
Front and rear two, described wet mud material blanking tube is connected with external crucible；The dewatered sludge blowdown pipe setting is multiple, positioned at cooling recycle stream
Change the position of bed Hou Qiang bottoms, this bed air distribution plate top and close air distribution plate, and it is uniform along cooling recirculating fluidized bed width
Arrangement, the outlet of dewatered sludge blowdown pipe is straight down.
The integrated conduct method of a kind of sludge provided by the invention, it is characterised in that methods described comprises the following steps：
1) conveying sprayer unit is crushed by after the dewatered sludge crushing of moisture content 75~80% using sludge, pass through wet mud
Atomizer forms the sludge of the particle containing sand 150~200 μm of drop, is uniformly ejected into main fluidized-bed；
2) it is 0.673m/s to control the fluidising air velocity in main fluidized-bed main body<u<0.887m/s so that fluidising air velocity is just
More than the final Sedimentation Velocity of wet mud particle, and the not up to final Sedimentation Velocity of sand particle so that sand particle is made in gravity
Fluid bed bottom part body is deposited under and forms bubbling fluidized bed, and wet mud particle is then raised under the drag force effect of fluidized wind
Main fluidized-bed is separated out, into separator inlet pipeline；
3) convey sprayer unit using vegetation water and vegetation water is atomized into the droplet that particle diameter is 10~40 μm, a part is planted
Thing liquid, along fluid bed cross-sectional direction, is uniformly sprayed downwards by main fluidized-bed main body internal upper part by main bed vegetation water atomizer
It is spread across in fluid bed, is sufficiently mixed with the wet mud particle of rising；By another part vegetation water by separator inlet pipeline
Top introduce, sprayed downwards by inlet pipeline vegetation water atomizer, carried out again with the wet mud particle of lateral flow
It is sufficiently mixed, deodorization is carried out to wet mud；
4) the wet mud particle gone after desanding particle and deodorization, fluidized bed drying cooling dress is entered by wet mud material blanking tube
Put, drying cycles fluid bed, as fluidized wind, is formed bubbling fluidization in drying cycles fluid bed, wet mud is entered by hot blast
Go and fully dry, dried sludge enters cooling recirculating fluidized bed, recirculating fluidized bed is cooled down by cold wind as fluidized wind, cold
But bubbling fluidization is formed in recirculating fluidized bed, dewatered sludge is cooled down；
5) the sand particle removed is by sand particle blowdown pipe discharge system；Desanding particle, deodorization, dried sludge are removed, by
Dewatered sludge blowdown pipe discharge system；Tail gas after processing is sent into exhaust gas processing device and handled.
The present invention compared with prior art, has the technique effect of advantages below and high-lighting：The present invention is a kind of continuous
Charging, the total system of continuous discharge, the system can realize that the removal of sand particle, wet mud deodorization, sludge are done in wet mud
The functions such as dry cooling：1. the present invention carries out sand particle removal to wet mud, sludge is avoided to cause sludge drying because sand factor is high
The abrasion of CIU and equipment, reduce enterprise operation, maintenance cost；2. carrying out abundant deodorization from the source of drying to sludge, avoid
Sludge produces stink in storage, transportation, additionally it is possible to the bulk density, mobility and particle diameter distribution of dewatered sludge is more closed
Reason.3. the sand particle removal of sludge, deodorization are with drying, achievable drying sludge, the synchronous of burning process are carried out, and are reduced
The shared space of dewatered sludge storage, conveying, improves drying sludge, the automatization level of burning process.4. pass through vent gas treatment
Device, the tail gas containing moisture and mud granule can be made effectively to be handled and recycled.
In a word, the present invention solves sludge because sand factor is high, causes asking for sludge drying and incineration system and equipment attrition
Topic, reduces enterprise operation, maintenance cost；Solve the problems, such as that sludge anhydration burning engineering project place spreads all over foul smell simultaneously,
Reduce enterprise to drawing smelly, deodorizing device fund input, and realize the continuous drying of sludge, have good engineering should
Use prospect.
Brief description of the drawings
Fig. 1 is the overall structure diagram of present system.
Fig. 2 is the removal of fluid bed sand particle and the principle schematic diagram of odor removal.
Fig. 3 is the structural representation of fluidized bed drying cooling device.
In figure：1- micron order disintegrating apparatus, 2- wet mud tanks, 3- main valves, 4- wet mud delivery mains, 5- screw pumps,
6- sub-valves, 7- wet mud atomizers, 8- vegetation water atomization control device cabinets, 9- vegetation water delivery mains, the main bed plants of 10-
Liquid atomizer, 11- inlet pipeline vegetation water atomizers, 12- air compartments, 13- air distribution plates, 14- sand particle blowdown pipes, 15- master
Fluid bed, 16- separator inlet pipelines, the main cyclone separators of 17-, 18- Blowing stoppers, 19- wet mud material blanking tubes, 20- are dried and followed
Ring fluid bed, 21- centres demarcation strip, 22- drying device cyclone separators, 23- refeed lines, 24- intermediate connection pipes, 25- coolings
Recirculating fluidized bed, 26- cooling device cyclone separators, 27- dewatered sludge blowdown pipes, 28- offgas ducts, 29- condensers, 30- air inducing
Machine, 31- sludge crush conveying sprayer unit, and 32- vegetation waters conveying sprayer unit, 33- fluid bed sand particle removes to be filled with deodorization
Put, 34- fluidized bed drying cooling devices, 35- exhaust gas processing devices.
Embodiment
Structure, principle and the course of work of the present invention are described further below in conjunction with the accompanying drawings.
Referring to Fig. 1, Fig. 2 and Fig. 3, system provided by the invention mainly crushes conveying sprayer unit 31, vegetation water by sludge
Convey sprayer unit 32, fluid bed sand particle is removed and filled with odor removal 33, fluidized bed drying cooling device 34 and vent gas treatment
Put 35 compositions.The sand particle removes contains main fluidized-bed 15 and main cyclone separator 17 with odor removal, in main cyclonic separation
Inlet pipeline vegetation water atomizer 11 is provided with device inlet pipeline 16；Middle part in main fluidized-bed is horizontal along forward and backward wall surface
To be vertically arranged it is some to the wet mud atomizers 7 that liquidate of level, the wet mud atomizer by pipeline with it is described
Sludge crushes conveying sprayer unit connection；Top in main fluidized-bed is provided with the main bed vegetation water atomizer 10 of some rows,
Vegetation water conveying sprayer unit passes through pipeline and main bed vegetation water atomizer 10 and inlet pipeline vegetation water atomizer respectively
11 are connected；Sand particle blowdown pipe 14 is disposed with main fluidized-bed bottom；The fluidized bed drying cooling device 34 includes drying
Recirculating fluidized bed 20, drying device cyclone separator 22, cooling recirculating fluidized bed 25 and cooling device cyclone separator 26, are dried
Recirculating fluidized bed is connected by intermediate connection pipe 24 with cooling recirculating fluidized bed；Dry dirt is installed in cooling recirculating fluidized bed bottom
Mud blowdown pipe 27；Wind is respectively disposed with main fluidized-bed bottom, drying cycles fluidized-bed bottom and cooling recirculating fluidized bed bottom
Room 12 and air distribution plate 13；The bottom of main cyclone separator 17 is provided with Blowing stopper 18, and the bottom of the Blowing stopper passes through wet mud blanking
Pipe 19 is connected with drying cycles fluid bed；The bottom of drying device cyclone separator 22 and cooling device cyclone separator 26 is also divided
Not She You Blowing stopper, the two Blowing stoppers pass through refeed line 23 and drying cycles fluid bed and cooling recirculating fluidized bed phase respectively
Even；The central tube of three cyclone separators is connected by offgas duct 28 with described exhaust gas processing device respectively.
The total system of above-mentioned sludge, the sludge crush conveying sprayer unit by micron order disintegrating apparatus 1, wet dirt
Mud tank 2, main valve 3, wet mud delivery main 4, screw pump 5, sub-valve 6, wet mud atomizer 7 form；The vegetation water
Sprayer unit is conveyed by vegetation water atomization control device cabinet 8, vegetation water delivery main 9, sub-valve 6, the atomization spray of main bed vegetation water
Mouth 10, inlet pipeline vegetation water atomizer 11 form；The main bed vegetation water atomizer 10 is arranged multiple, is evenly arranged in
In main fluidized-bed 15 in cross-sectional direction, the surface of air distribution plate 13 is directed at straight down；Inlet pipeline vegetation water atomizer 11 is pacified
Loaded on the main top of cyclone inlet pipeline 16, the bottom of separator inlet pipeline 16 is directed at straight down.
The total system of above-mentioned sludge, the sand particle blowdown pipe 14 set it is multiple, positioned at the front wall of main fluidized-bed 15
Bottom, the top of air distribution plate 13 are evenly arranged, sand particle blowdown close to the position of air distribution plate 13 along the width of main fluidized-bed
The outlet of pipe 14 is straight down.
The total system of above-mentioned sludge, the middle part of the drying cycles fluid bed 20 are provided with middle demarcation strip 21, should
Dividing plate is divided into front and rear two of bottom connection, and described wet mud material blanking tube 19 is connected with external crucible；The intermediate connection pipe
24, one end connects with the Hou Qiang bottoms of drying cycles fluid bed 20, and the other end connects with cooling recirculating fluidized bed 25 front wall bottom；Institute
State dewatered sludge blowdown pipe 27 set it is multiple, above cooling recirculating fluidized bed 25 Hou Qiang bottoms, air distribution plate 13 and close air distribution plate
13 position, and be evenly arranged along the cooling width of recirculating fluidized bed 25, the outlet of dewatered sludge blowdown pipe 27 is straight down.
The total system of above-mentioned sludge, the exhaust gas processing device is by offgas duct 28, condenser 29,30 groups of air-introduced machine
Into.The entrance of condenser 29 is connected with offgas duct 28；The outlet of condenser 29 is connected with air-introduced machine 30.
Specific implementation method is：
The dewatered sludge micron order disintegrating apparatus 1 of moisture content 75~80% is crushed, the wet mud particle after crushing (contains
Sand particle) deliver to wet mud tank 2 and store.The wet mud being stored in wet mud tank 2, controlled by main valve 3 defeated into wet mud
The flow of house steward 4 is sent, wet mud is delivered to several in the middle part of the front and rear wall surface of main fluidized-bed 15 by screw pump 5
Wet mud atomizer 7, the wet mud mist flow of each wet mud atomizer 7 is controlled by a sub-valve 6, finally by wet
Sludge atomizer 7 is atomized wet mud, forms 150~200 μm of wet mud and sand particle droplet, and by wet mud particle droplet
Uniformly it is ejected into main fluidized-bed 15 with sand particle droplet.By controlling fluidized wind (cold wind) speed in main fluidized-bed 15 to be
0.673m/s<u<0.887m/s so that fluidising air velocity is just above the final Sedimentation Velocity of wet mud particle, and not up to sand
The final Sedimentation Velocity of grain, so that sand particle is deposited to the bottom of main fluidized-bed 15 under gravity forms bubbling fluidization
Bed, and wet mud particle goes out main fluidized-bed 15 under the drag force effect of fluidized wind by elutriation, into separator inlet pipeline 16；Most
Eventually less than 200 μm of sand particle is removed from wet mud, and by the discharge system of sand particle blowdown pipe 14.
The final Sedimentation Velocity computational methods of mud granule, sand particle：
Individual particle final Sedimentation Velocity (i.e. individual particle free-falling speed in fluid) is calculated by following formula：
Wherein
In above-mentioned formula, ut0For individual particle final Sedimentation Velocity (m/s), dpFor particle diameter (m), μgFor the power of gas
Viscosity (kg/ms),For Archimedes's criterion numeral, ρsFor grain density (kg/m3), ρgFor gas density
(kg/m3), φ is particle sphericity, and g is acceleration of gravity (m/s2)。
Formula (1), (2), (3) are only applicable to the very low situation of individual particle or granule density.A kind of integrated treatment of sludge
In system operation, chance when granule density is larger, mutually collided between particle, to rub is a lot, and this necessarily gives multiphase flow
It is dynamic to bring considerable influence.The final Sedimentation Velocity of particle in more particles is calculated, the influence of particles' interaction must be considered.Introduce
Granose drag coefficient CD, calculate the final Sedimentation Velocity of particle：
C in above formulaDFor granose drag coefficient, calculated by Wen and Yu correlation：
CD=CD0ε-2.65 (5)
C in formulaD0For the drag coefficient of individual particle, ε is voidage.Obtained by formula (4), formula (5) simultaneous：
The terminal of mud granule and sand particle in sludge and sand particle suspensions can be calculated by formula (1), (2), (3), (6)
Sinking speed, operating air velocity u is set to be more than mud granule final Sedimentation Velocity utw, and it is less than sand particle final Sedimentation Velocity uts, and
Operating air velocity u is set to be more than sand particle minimum fluidization velocity umfs(being calculated by formula (7), (8)), so that sand particle is in fluidisation
State.
Minimum fluidization velocity umfObtained by Reynolds number expression formula：
Re in formulap,mfFor the Reynolds number under the conditions of initiation of fluidization.
The calculating of Reynolds number uses Wen and Yu correlation under the conditions of initiation of fluidization：
C in formula1=27.2, C2=0.0408,For Archimedes's criterion numeral.
Operating air velocity, mud granule final Sedimentation Velocity, the final Sedimentation Velocity of sand particle and minimum fluidization velocity calculate
Example：
The main component of sludge is clay, native density ps=2g/ml；The density p of 20 DEG C of waterwa=1g/ml；It is dirty with certain factory
Exemplified by mud butt sand factor 22.4%, then in aqueous 80% sludge in addition to shakeout particle, mud granule density is：
Sand grain density ρs=2650kg/m3；
The density of 20 DEG C of air is ρg=1.205kg/m3；
Under conditions of pressure is 101.325kPa, temperature is 20 DEG C, the dynamic viscosity μ of airg=17.9 × 10-6kg/
m·s；
Sludge returning dw=30~200 μm=1.5 × 10-4~2 × 10-4m；
Sand grain diameter ds=30~200 μm=1.5 × 10-4~2 × 10-4m；
It is assumed that space ε=0.997 of particle suspensions；
It is as follows based on above-mentioned initial data, result of calculation：
When sludge returning takes minimum value 1.5 × 10-4During m,
Note：Search document and know that aerobic particle mud sphericity is generally higher than 0.6, and break up coal powder sphericity is about 0.73,
Wet mud is crushed by micron order disintegrating apparatus in this patent, and powdery sludge size and physical characteristic and broken coal dust are substantially
Similar, it is 0.73 to take broken mud granule sphericity.
ut,w=ε1.325ut0,w=0.463m/s
Similarly, when sludge returning takes maximum 2 × 10-4During m, u is calculated to obtaint,w=0.673m/s；
When sand grain diameter takes minimum value 1.5 × 10-4During m, u is calculated to obtaint,s=0.887m/s；
When sand grain diameter takes minimum value 2 × 10-4During m, u is calculated to obtaint,s=1.237m/s.
Note：Search document to know, the average spherical degree of sand is 0.75.
The minimum fluidization velocity calculation procedure of sand particle：
When sand grain diameter takes maximum 2 × 10-4During m,
Therefore during plant running of the present invention, operating air velocity span should be 0.673m/s<u<0.887m/s.
Vegetation water carries out automatic ratio dilution by vegetation water atomization control device cabinet 8, and through atomization control device and plant
Liquid delivery main 9, a part are delivered to some vegetation water delivery branch pipes introduced by the front wall wall top of main fluidized-bed, each
Vegetation water delivery branch pipe controls plant flow quantity by a sub-valve 6 respectively, and the vegetation water in each introducing main fluidized-bed 15 is defeated
Send branch pipe that main bed vegetation water atomizer 10 is installed；Another part vegetation water delivery branch pipe is with being arranged on separator inlet pipeline
The inlet pipeline vegetation water atomizer 11 at 16 tops is connected, and inlet pipeline vegetation water atomizer 11 is by a sub-valve 6
Control plant flow quantity.Vegetation water is atomized into 10 by main bed vegetation water atomizer 10 and inlet pipeline vegetation water atomizer 11
The mist of~40 μm of particle diameters, it is dispersed in outside main bed vegetation water atomizer 10 and inlet pipeline vegetation water atomizer 11
Space, fully contacted, mixed with the foul smell molecule in incoming wet mud particle and air, by absorption, nucleophilic addition, urged
Change the series reactions such as oxidation, chemical combination, realize the purpose for removing foul smell in wet mud；Mixed drop and particle enter main rotation
Further strong mixing and the deodorization of wind separator 17.
During plant running, fluid bed sand particle is removed and fed with odor removal fluidized wind by air compartment 12, and fluidized wind leads to
Cross air distribution plate 13 and enter main fluidized-bed 15, the wet mud particle in main fluidized-bed 15 and sand is grain fluidized, carry wet mud
Grain enters main cyclone separator 17, by the centrifugation of main cyclone separator 17, carries tiny wet mud particle and water
The tail gas of steam enters offgas duct 28, most of thicker wet mud particle of collection by the central tube of main cyclone separator 17
Blowing stopper 18 is entered by the bottom of main cyclone separator 17, then drains into wet mud material blanking tube 19.
Desanding particle and the wet mud particle of deodorization is gone to enter fluidized bed drying cooling device by wet mud material blanking tube 19.
The fluidized wind (hot blast) of the drying cycles fluid bed 20 of fluidized bed drying cooling device, is fed, fluidized wind passes through cloth by air compartment 12
Aerofoil 13 enters drying cycles fluid bed 20.Into the wet mud particle of fluidized bed drying cooling device, first in drying cycles
Fluid bed 20 forms bubbling fluidization and is dried, and the middle part of drying cycles fluid bed 20 is provided with middle demarcation strip 21, made
Sludge by the middle foot passage of demarcation strip 21 it is in the horizontal direction unobstructed flow, desiccant fluidized wind carries partial sludge fine powder
Into drying device cyclone separator 22, tail gas enters offgas duct 28 by the central tube of drying device cyclone separator 22 afterwards, receives
The relatively coarse sludge fine powder of collection enters Blowing stopper 18 by the bottom of drying device cyclone separator 22, is then returned by refeed line 23
To drying cycles fluid bed 20.Dried sludge is entered from the Hou Qiang bottoms of drying cycles fluid bed 20 by intermediate connection pipe 24
Enter to cool down recirculating fluidized bed 25.The fluidized wind (cold wind) of cooling recirculating fluidized bed 25 is fed by air compartment 12, and fluidized wind passes through cloth wind
Plate 13 enters cooling recirculating fluidized bed 25.Into the dewatered sludge particle of cooling recirculating fluidized bed 25, in cooling recirculating fluidized bed 25
Interior formation bubbling fluidization is simultaneously cooled to required temperature, afterwards by the discharge system of dewatered sludge blowdown pipe 27, goes to dewatered sludge belt
Conveyer or dewatered sludge storehouse.Fluidized wind in cooling recirculating fluidized bed 25 carries part dewatered sludge fine powder and enters cooling device whirlwind
Separator 26, afterwards tail gas offgas duct 28 is entered by the central tube of cooling device cyclone separator 26, the thicker dewatered sludge of collection is thin
Powder enters Blowing stopper 18 by the bottom of cooling device cyclone separator 26, and it is ciculation fluidized to be then returned to cooling by refeed line 23
Bed 25.
By main cyclone separator 17, drying device cyclone separator 22, cooling device cyclone separator 26 collect Lai tail
Gas (containing moisture and mud granule) is condensed by offgas duct 28 into condenser 29；Circulation is passed through cooling in condenser
Water, the tail gas entered in condenser is condensed, condensed condensation waste water carries out reuse by sewage disposal；It is incoagulable
Waste gas is drawn by air-introduced machine 30 and is sent into sludge incinerator and burned.
Claims (5)
1. a kind of total system of sludge, the system includes sludge and crushes conveying sprayer unit (31), vegetation water conveying spray
Mist device (32), fluidized bed drying cooling device (34) and exhaust gas processing device (35), it is characterised in that：The system also includes
Fluid bed sand particle removes contains main fluidized-bed (15) and main whirlwind with odor removal (33), sand particle removal with odor removal
Separator (17), inlet pipeline vegetation water atomizer (11) is provided with main cyclone inlet pipeline (16)；In main flow
Middle part in change bed laterally and is vertically arranged some wet mud atomizers (7) to be liquidated to level along forward and backward wall surface, and this is wet
Sludge atomizer crushes conveying sprayer unit (31) with described sludge by pipeline and is connected；Top peace in main fluidized-bed
Equipped with the main bed vegetation water atomizer (10) of some rows, vegetation water conveying sprayer unit (32) passes through pipeline and main bed plant respectively
Liquid atomizer (10) and inlet pipeline vegetation water atomizer (11) connect；Sand particle blowdown is disposed with main fluidized-bed bottom
Manage (14), air compartment and air distribution plate；The fluidized bed drying cooling device (34) includes drying cycles fluid bed (20) and cooling follows
Ring fluid bed (25), drying cycles fluid bed are connected with cooling recirculating fluidized bed by intermediate connection pipe (24), circulated in cooling
Fluid bed bottom is provided with dewatered sludge blowdown pipe (27)；The bottom of main cyclone separator is provided with Blowing stopper (18), the bottom of the Blowing stopper
Portion is connected by wet mud material blanking tube (19) with drying cycles fluid bed (20)；Drying device cyclone separator (22) and cooling dress
The bottom for putting cyclone separator (26) is also respectively equipped with Blowing stopper, and the two Blowing stoppers are followed by refeed line (23) and drying respectively
Ring fluid bed is connected with cooling recirculating fluidized bed；The central tube of three cyclone separators respectively by offgas duct (28) with it is described
Exhaust gas processing device (35) connects.
2. the total system of a kind of sludge according to claim 1, it is characterised in that sludge crushes conveying spraying dress
Put and by wet mud delivery main (4) and divide including micron order disintegrating apparatus (1) and wet mud tank (2), the outlet of wet mud tank
Branch pipe is connected with described wet mud atomizer (7), and main valve (3) and screw pump are provided with wet mud delivery main
(5) sub-valve (6), is installed on each limb.
A kind of 3. total system of sludge according to claim 1, it is characterised in that the sand particle blowdown pipe
(14) multiple, the position of close air distribution plate (13) above main fluidized-bed (15) front wall bottom, air distribution plate (13), and edge are set
The width of main fluidized-bed is evenly arranged, and the outlet of sand particle blowdown pipe (14) is straight down.
A kind of 4. total system of sludge according to claim 1, it is characterised in that the drying cycles fluid bed
(20) middle part is provided with middle demarcation strip (21), and the dividing plate is divided into front and rear two of bottom connection, and described wet mud falls
Expects pipe (19) is connected with external crucible；The dewatered sludge blowdown pipe (27) set it is multiple, in cooling recirculating fluidized bed (25) Hou Qiang bottoms,
Above air distribution plate (13) and close to the position of air distribution plate (13), and it is evenly arranged along cooling recirculating fluidized bed (25) width,
The outlet of dewatered sludge blowdown pipe (27) is straight down.
5. the integrated conduct method of a kind of sludge using system as claimed in claim 1, it is characterised in that methods described includes
Following steps：
1) conveying sprayer unit is crushed by after the dewatered sludge crushing of moisture content 75~80% using sludge, be atomized by wet mud
Nozzle (7) forms the sludge of the particle containing sand 150~200 μm of drop, is uniformly ejected into main fluidized-bed；
2) it is 0.673m/s to control the fluidising air velocity in main fluidized-bed<u<0.887m/s so that fluidising air velocity is just above wet dirt
The final Sedimentation Velocity of mud particle, and the not up to final Sedimentation Velocity of sand particle so that sand particle settles under gravity
Bubbling fluidized bed is formed to main fluidized-bed bottom, and wet mud particle then goes out mainstreaming under the drag force effect of fluidized wind by elutriation
Bed, into separator inlet pipeline；
3) convey sprayer unit using vegetation water and vegetation water is atomized into the droplet that particle diameter is 10~40 μm, by a part of vegetation water
By main fluidized-bed internal upper part, along fluid bed cross-sectional direction, uniformly it is sprayed onto downwards by main bed vegetation water atomizer (10)
In fluid bed, it is sufficiently mixed with the wet mud particle of rising；By another part vegetation water by the upper of separator inlet pipeline
Portion introduces, and is sprayed downwards by inlet pipeline vegetation water atomizer (11), is carried out again with the wet mud particle of lateral flow
It is sufficiently mixed, deodorization is carried out to wet mud；
4) the wet mud particle gone after desanding particle and deodorization, enters fluidized bed drying cooling device by wet mud material blanking tube, does
Dry recirculating fluidized bed, as fluidized wind, is formed bubbling fluidization in drying cycles fluid bed, wet mud is filled by hot blast
Divide drying, dried sludge enters cooling recirculating fluidized bed, and cooling recirculating fluidized bed, as fluidized wind, is followed by cold wind in cooling
Bubbling fluidization is formed in ring fluid bed, dewatered sludge is cooled down；
5) the sand particle removed is by sand particle blowdown pipe discharge system；Desanding particle, deodorization, dried sludge are removed, by dry dirt
Mud blowdown pipe discharge system；Tail gas after processing is sent into exhaust gas processing device and handled.
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| CN109893995A (en) * | 2017-12-08 | 2019-06-18 | 上海和惠生态环境科技有限公司 | A kind of novel sewage sludge drying tail gas dust cleaning apparatus |
| CN109322296A (en) * | 2018-11-15 | 2019-02-12 | 中持水务股份有限公司 | A kind of pond face cleaning plant for treatment tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007196931A (en) * | 2006-01-30 | 2007-08-09 | Kazuo Miyata | Sludge treatment vessel |
| JP4937059B2 (en) * | 2006-09-21 | 2012-05-23 | 月島機械株式会社 | Sewage sludge treatment method and sewage sludge treatment equipment |
| CN102583945B (en) * | 2012-01-13 | 2013-09-18 | 哈尔滨工业大学 | Fluidized bed combustion treatment device provided with sludge multi-stage drying device, and fluidized bed combustion treatment method |
| CN103979766A (en) * | 2014-05-26 | 2014-08-13 | 南京理工大学 | Indirect sludge drying tail gas treatment device and treatment method thereof |
| CN104211274A (en) * | 2014-09-28 | 2014-12-17 | 天津清华德人环境工程有限公司 | Sludge reduction and recycling treatment device and sludge treatment method |
| CN104310746B (en) * | 2014-10-29 | 2015-10-07 | 天津市美好生活科技有限公司 | The method of a kind of dewatered sludge drying and incineration process |
| CN205170636U (en) * | 2015-10-30 | 2016-04-20 | 清华大学 | Integrated processing system of mud |
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