CN110204169A - The desiccation of nested type sludge at low temperature and prilling granulator and its method - Google Patents
The desiccation of nested type sludge at low temperature and prilling granulator and its method Download PDFInfo
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- CN110204169A CN110204169A CN201910300879.4A CN201910300879A CN110204169A CN 110204169 A CN110204169 A CN 110204169A CN 201910300879 A CN201910300879 A CN 201910300879A CN 110204169 A CN110204169 A CN 110204169A
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- 239000010802 sludge Substances 0.000 title claims abstract description 171
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 23
- 239000003517 fume Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 6
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000010801 sewage sludge Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003546 flue gas Substances 0.000 abstract description 12
- 239000006185 dispersion Substances 0.000 abstract description 8
- 238000005469 granulation Methods 0.000 abstract description 4
- 230000003179 granulation Effects 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 239000010813 municipal solid waste Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- -1 steam power plant Chemical compound 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of nested type sludge at low temperature desiccation and prilling granulator and its method, belong to sludge treatment equipment field.The core of the device is the double-roller structure of inner roller and outer roller composition, outer roller is coaxially nested in outside inner roller, it is fixed between two rollers by circumferential a plurality of support rod, and a toroidal cavity is formed between two rollers, sludge carries out dispersion and desiccation in inner roller, and secondary desiccation is carried out in the toroidal cavity between outer roller and inner roller and is granulated.Plane space shared by the device reduces half than original segmented sludge at low temperature desiccation apparatus.And for the granulation of the sludge drying of segmented, the device of the invention can be such that the efficiency of sludge drying improves from the 60-80% of original segmented to 90-98%, in sludge situation identical with the heat exchange reaction elapsed-time standards of flue gas, the output increased 40-60% of segmented sludge at low temperature desiccation is compared in nested type sludge at low temperature desiccation.
Description
Technical field
The invention belongs to sludge treatment equipment fields, and in particular to a kind of nested type sludge at low temperature desiccation and prilling granulator and
Its method.
Background technique
Municipal sewage and industrial wastewater can generate a large amount of sludge in purification process, and it is micro- that this sludge not only contains pathogeny
Biological, a variety of organic and inorganic pollutions and heavy metal, and moisture content is high and bulky, is a kind of harmfulness therefore
Great solid waste.How to handle to economic security sludge of sewage treatment plant is global environment difficulties, solves this
Environment difficulties are very urgent for China, this is because the quantity of China's sludge is especially big, it is (aqueous more than 100,000,000 tons/year
Rate 80%), and increased with the growth rate of annual 10-15%, therefore the space of basic not Sludge landfill；Additionally, due to China
Sanitary sewage and industrial wastewater merging treatment, to keep the ingredient of sludge extremely complex, especially content of beary metal is very high, can not
Land use.Major part sludge in China's is just disorderly temporarily stored up or is simply filled, no only after preliminary treatment at present
The land resource of large area is only taken up, and destroys ecological environment and polluted underground water resource, local environment is caused serious
Secondary pollution.
Sewage sludge harmlessness, minimizing and recycling treatment are the targets that countries in the world are made joint efforts, and reduce containing for sludge
Water rate and the volume for reducing sludge, make sludge realize minimizing first, are final realization sewage sludge harmlessness and recycling treatment
It is crucial.Practice is it has been shown that " heat drying " is deeply dehydrating sludge and reduction volume most efficient method, still, sludge heat drying
It is the process of Net Energy consumption, energy consumption cost usually accounts for 80 or more the percent of Treatment of Sludge total cost, thus there is " energy consumption
Bottleneck ".Experimental study shows some organic matters in sludge can be made to be pyrolyzed when 300 DEG C of desiccation temperature > simultaneously, this
One result not only causes to greatly increase the processing cost of tail gas containing a large amount of pernicious gases in tail gas, but also because having in sludge
Machine object content reduces and reduces the utility value of sludge calorific value resource.Therefore, sludge drying must carry out at low temperature.
For the energy resource structure of China based on fire coal, Chinese coal annual consumption is more than 3,600,000,000 tons, accounts for about the domestic energy and always disappears
Take 66%, in following 20 years, China's entirety consumption of coal will keep higher level.All parts of the country are throughout significantly
The flue-gas temperature of the discharges such as slight steam power plant and cement plant and garbage burning factory is generally between 120~200 DEG C, largely
The energy is discharged by flue gas in the form of wasted energy and is lost, the tremendous potential contained in the flue gas of these discharges, exactly
The optimal heat source of sludge at low temperature desiccation, especially while using smoke residual heat to dry sludge, due to using hot fume
The mode directly contacted with wet mud, wet mud can adsorb the PM10 of 60% or more PM2.5 and 43% or more in flue gas, with
And sulfur dioxide of 22-25% etc., therefore have the function of that source controls haze.Experimental study show cryogenic conditions (i.e.
120-200 DEG C of flue-gas temperature) under, sludge drying and granulation process are completed, enough spaces and sufficient time is needed
Guarantee the heat exchange reaction between hot fume and wet mud.However, independently being provided for oneself in specific implementation using fume afterheat or use
When the sludge at low temperature drying engineering of heat source flue gas, usually because Engineering Project Implementation unit lacks enough spatial positions, and make
The integrated apparatus and its auxiliary equipment of sludge at low temperature desiccation and granulation be difficult to arrange on plane space position, finally influences work
The landing of journey item purpose.
The phenomenon that sludge at low temperature drying engineering is difficult to carry out is influenced because spatial position is narrow in order to change, we have invented
A kind of nested type sludge at low temperature desiccation and granulating integrated device, not only improve the efficiency of sludge at low temperature desiccation, but also make dirt
Mud desiccation can be completed with granulation process in the smallest plane space, to make to utilize fume afterheat or independent household heat source cigarette
Occupied area required for the sludge at low temperature drying engineering of gas is put down shared by the sludge at low temperature drying engineering than original same size
Space of planes reduces half or more, this especially can make full use of cigarette successfully to promote sludge at low temperature drying technique
Gas residual heat resources thoroughly overcome " the energy consumption bottleneck " of sludge heat drying, create advantage.
Summary of the invention
It is an object of the invention to solve problems of the prior art, and provide a kind of nested type sludge at low temperature desiccation
With prilling granulator and its method.
Specific technical solution of the present invention is as follows:
A kind of nested type sludge at low temperature desiccation and prilling granulator comprising inner roller and outer roller, the outer roller are same
Axis is nested in outside inner roller, and forms toroidal cavity between two rollers；Inner roller and outer roller are driven by driving device
Rotation；The inner wall of the inner roller is equipped with the lifting blade that several rows circumferentially lay along inner roller, the institute in every row's lifting blade
There is lifting blade in the front end of inner roller to evenly distributed between rear end；The inner wall of the prominent inner roller of every piece of lifting blade, is used for
It drives sludge to rotate together in inner roller rotation process, and falls sludge again when going to top area；The interior rolling
Cylinder front end is equipped with the first air inlet and sludge inlet, and rear end bottom surface is equipped with the first sludge discharge hole, and first sludge goes out
Material mouth is connected to inner roller and the toroidal cavity；It is equipped at sludge inlet for dispersing to sludge in inner roller
Sludge disperser；The outer roller inner wall is equipped with one or more sludge mobile guide plate, and the sludge movement is led
It is the guide plate extended in a spiral form from outer roller rear end forward end to plate；The outer roller front end is equipped with the second air inlet
Mouthful, front end bottom surface is equipped with the second sludge discharge hole, and inner roller and outer roller rear end are equipped with gas outlet.
Preferably, the mounting plane of every piece of lifting blade and the inclined angle of inner roller axial line, and driven in inner roller
Lifting blade makes sludge on slope to close by inner bottom surface inner top surface rotary course, lifting blade forms a slope
Inner roller rear end side slides.
Preferably, support is fixed by several support rods between the inner roller and outer roller.
Preferably, the inner roller and outer roller is fixed on same central axis, synchronous rotary.
Further, the central axis is driven by driving device and is rotated.
Preferably, the driving device is frequency modulation motor.
Preferably, the inner roller and outer roller rear end shares the same gas outlet.
Preferably, the inner roller barrel diameter is 1.5~3.0m, a length of 8~25m.
Preferably, the outer roller barrel diameter is 3.0~5.0m, a length of 8~25m.
Another object of the present invention is to provide it is a kind of using above-mentioned desiccation and the sludge at low temperature desiccation of prilling granulator with make
Grain method, its step are as follows:
Inner roller and outer roller is driven to press the revolving speed set incessantly rotationally clockwise by driving device, it is aqueous
Rate is continuously fed into inner roller from 80% or more wet mud by the sludge inlet above front end, and hot fume passes through interior
First air inlet of drum front end is continuously fed into inner roller, is directly contacted with wet mud and is carried out heat exchange reaction, in dirt
Under the collective effect of mud disperser and lifting blade, the moisture content of sludge is made to be down to 60% hereinafter, then from the of inner roller rear end
One sludge discharge hole is fallen into the rear end of outer roller；In outer roller, is pushed using sludge mobile guide plate from inner roller and fallen
Sludge, it is mobile from rear end forward end；Hot fume is sent into outer roller from the second air inlet simultaneously, in outer roller and inner roller
Between toroidal cavity in, make hot fume and sludge continue directly to contact progress heat exchange reaction, when the moisture content of sludge is down to
40% or less the mud granule that simultaneously self-assembling formation partial size is 2-8 millimeters exports it from the second sludge discharge hole below front end
Cooled down, when mud granule is cooled to room temperature, moisture content is down to < 30%, volume reduce to the one third of original volume with
Under, and save 95% original calorific value；Flue tail gas after sludge drying, by air-introduced machine from inner roller and outer roller rear end
Gas outlet extraction, after being dusted processing, qualified discharge.
The present invention has the advantages that compared with prior art
If 1), can be in the case where not consuming new energy, by sewage treatment plant's dirt using smoke residual heat to dry sludge
The water content of mud accounts for total weight mass percent and is down to 30% hereinafter, reducing sludge volume to one third hereinafter, thorough gram
" the energy consumption bottleneck " of sludge heat drying is taken.
2) plane space shared by nested type sludge at low temperature desiccation apparatus is than original segmented sludge at low temperature desiccation apparatus
Half is reduced, so that change steam power plant, cement plant, garbage burning factory etc. makes to utilize flue gas because ground space is narrow
Residual heat to dry sludge engineering project is difficult to the phenomenon that landing.
3) in a manner of the desiccation that wet mud is directly contacted with hot fume, the efficiency of sludge drying is not only made to reach maximization,
More importantly sludge can adsorb a large amount of PM2.5 and PM10 and sulfur dioxide in flue gas, to play to atmosphere dirt
The source control action of dye.
4) sludge at low temperature desiccation is become into nested type, sludge dispersion and drying process from original segmented due to the present invention
It is carried out in the state of totally-enclosed, to make sludge dispersion and be heated simultaneously inside and outside the cylinder of drying equipment, therefore, dirt can be made
The efficiency of mud desiccation is improved from the 60-80% of original segmented to 90-98%, in the heat exchange reaction of sludge and flue gas through lasting
Between in identical situation, the output increased 40-60% of segmented sludge at low temperature desiccation is compared in nested type sludge at low temperature desiccation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of a kind of desiccation of nested type sludge at low temperature and prilling granulator；
Fig. 2 is the inner roller sectional schematic diagram installed after lifting blade (by taking 4 row's lifting blades as an example)；
Fig. 3 is the structural schematic diagram of outer roller；
Appended drawing reference in figure: inner roller 1, outer roller 2, the first air inlet 3, sludge inlet 4, sludge disperser 5, lifting
Plate 6, the first sludge discharge hole 7, support rod 8, sludge mobile guide plate 9, the second air inlet 10, gas outlet 11, the second sludge go out
Material mouth 12.
Specific embodiment
The present invention is further elaborated and is illustrated with reference to the accompanying drawings and detailed description.
As shown in Figure 1, being the desiccation of nested type sludge at low temperature and the prilling granulator in one embodiment, core is inner roller
1 and the double-roller structure that forms of outer roller 2, outer roller 2 be coaxially nested in the outside of inner roller 1, pass through circumferential direction between two rollers
A plurality of support rod 8 be fixed, and between two rollers formed a toroidal cavity.The shape of inner roller 1 and outer roller 2
It is elongated cylinder, wherein the barrel diameter of inner roller 1 is 1.5~3.0m, a length of 8~25m；The barrel diameter of outer roller 2
It is configured according to actual needs for 3.0~5.0m, a length of 8~25m, the outer diameter of inner roller 1 is necessarily less than the interior of outer roller 2
Diameter.Sludge carries out dispersion and desiccation in inner roller 1, carries out in the toroidal cavity between outer roller 2 and inner roller 1 secondary dry
Change and is granulated.
Inner roller 1 and outer roller 2 are fixed on same central axis, and inner roller 1 and outer roller 2 are driven together by driving device
Step rotation, driving device can be realized using frequency modulation motor cooperation retarder, naturally it is also possible to can drive roller using other
The equipment of rotation.It is circumferential equidistant along inner roller 1 that the inner wall of inner roller 1 is equipped with 4~8 row's lifting blade, 6,4~8 row's lifting blade 6
It lays.All lifting blades 6 in every row's lifting blade 6 are in the front end of inner roller 1 to evenly distributed between rear end.As shown in Fig. 2, every
The inner wall of the prominent inner roller 1 of block lifting blade 6, being subject to preferably to push sludge.In 1 rotation process of inner roller
In, lifting blade 6 drives sludge to rotate together, and when going to the region of top certain altitude, sludge is detached under the effect of gravity
Lifting blade 6 is fallen on the lifting blade 6 of lower section.The sludge fallen on the lifting blade 6 of lower section continues to be driven to rotate.In order to make dirt
Mud can be moved axially along inner roller 1, preferably need to make the inclination installation of lifting blade 6, i.e., the mounting plane of every piece lifting blade 6 with it is interior
The inclined angle of 1 axial line of roller, and drive lifting blade 6 by inner bottom surface inner top surface rotary course in inner roller 1, lifting blade
6 form a slope, roll sludge along slope under the effect of gravity, and the low spot of slope is close to 1 rear end of inner roller
Side, therefore sludge can slide to the back-end during being raised, and then slide from lifting blade 6, it is whole gradually inside
The end of roller 1 is mobile.Sludge from rear end by that can export after repeatedly raising, sliding.
1 front end of inner roller is equipped with the first air inlet 3, is equipped with sludge inlet 4,1 rear end bottom of inner roller in the top of front end
Face (i.e. the cylindrical side of roller) is equipped with the first sludge discharge hole 7.Wherein, the first air inlet 3 is external by intake stack connection
Hot air source, external hot air source can be the cigarette of the facility with waste heat flue gas such as steam power plant, cement plant, garbage burning factory, boiler
Gas discharge outlet, is also possible to the equipment that can generate hot wind, and hot fume or hot wind enter after two-layer cylinder for dewatered sludge.It is dirty
Mud is inputted from sludge inlet 4.Sludge disperser 5 is equipped in inner roller 1 at the sludge inlet 4, for from dirt
The sludge that mud feed inlet 4 inputs tentatively is dispersed.Sludge disperser 5 can use dispersing apparatus in the prior art, can also
To be realized using the equipment such as the chain of steel or chain hammer.First sludge discharge hole 7 is connected between inner roller 1 and two rollers
Toroidal cavity, the sludge after the preliminary desiccation of inner roller 1 are fallen from the first sludge discharge hole 7, between two rollers
Toroidal cavity continues desiccation.
2 inner wall of outer roller is equipped with one or more sludge mobile guide plate 9.As shown in figure 3, sludge mobile guide plate 9
For the guide plate extended in a spiral form from 2 rear end forward end of outer roller, a screw conveying structure is formed.2 front end of outer roller
Equipped with the second air inlet 10 and the second sludge discharge hole 12, inner roller 1 and 2 rear end of outer roller are equipped with shared gas outlet 11, the
Two air inlets 10 also connect fume afterheat source or blast heater by ventilation shaft.And the second sludge discharge hole 12 is set to outside
On 2 front end bottom surface of roller (i.e. the cylindrical side of outer roller 2), band connection sludge storage region can be transmitted by sludge.Gas outlet
11 pass through qualified discharge after pipeline connection tail gas treatment device.In the present embodiment, tail gas treatment device can select as needed
Multistage cleaner or dust-removing desulfurating apparatus.
Sludge at low temperature desiccation and prilling process based on above-mentioned desiccation and prilling granulator, its step are as follows:
Water content to be processed is accounted for into the sludge of sewage treatment plant that total weight mass percent is 80% or more, is deposited in advance
It is stored in sludge storage storage.Drive inner roller 1 and outer roller 2 square clockwise incessantly by the revolving speed of setting by driving device
To rotation, wet mud of the moisture content from 80% or more is quantified after mud machine 19 is divided into bulk by double helix, uniformly continuous
Ground is continuously fed into inner roller 1 by the sludge inlet 4 above front end, steam power plant, cement plant, garbage burning factory, boiler
The hot fume of equal discharges is continuously fed into inner roller 1 by air-introduced machine from the first air inlet 3 of 1 front end of inner roller, and wet
Sludge, which directly contacts, carries out heat exchange reaction.The input quantity of sludge and hot fume needs to control in certain optimal proportion.By
Sludge bulking after the dispersion of sludge disperser 5, is gradually raised by lifting blade 6 --- it falls, in conjunction with the desiccation of hot fume
Journey continues to be broken for smaller bulk.Therefore, under the collective effect of sludge disperser 5 and lifting blade 6, make the aqueous of sludge
Rate is down to 60% hereinafter, then falling into the rear end of outer roller 2 from the first sludge discharge hole 7 of 1 rear end of inner roller.In outer roller
In 2, the sludge fallen from inner roller 1 is pushed using sludge mobile guide plate 9, it is mobile from rear end forward end；Simultaneously by hot fume
Be sent into outer roller 2 from the second air inlet 10, in the toroidal cavity between outer roller 2 and inner roller 1, make hot fume and sludge after
Continuous directly contact progress heat exchange reaction, in 9 pushing course of sludge mobile guide plate, sludge can gradually form again it is granular, by
This realizes mud granulizing.When the moisture content of sludge is down to 40% or less the mud granule that simultaneously self-assembling formation partial size is 2-8 millimeters, general
It is cooled down from the second sludge discharge hole 12 output below front end, and when mud granule is cooled to room temperature, moisture content is down to <
30%, volume reduce to the one third of original volume hereinafter, and save 95% original calorific value, can be used as auxiliary fuel together with coal
Burning is mixed, can also be used as the raw material of cement, or fire the resource utilizations such as light energy saving brick, haydite.After sludge drying
Flue tail gas is extracted out by air-introduced machine from the gas outlet 11 of 2 rear end of inner roller 1 and outer roller, after being dusted processing, row up to standard
It puts.
In this embodiment, the desiccation of nested type sludge at low temperature is with plane space shared by prilling granulator than original segmented
Sludge at low temperature desiccation apparatus reduces half.And due to the present invention by sludge at low temperature desiccation from two sections of original segmenteds
Become nested type, sludge dispersion carries out in the state of totally-enclosed with drying process (being equivalent to original first segment desiccation), no
So that sludge dispersion and the inner cylinder 1 of drying equipment is not cooled down due to off-energy because exposing, and makes sludge dispersion and desiccation
The inner cylinder 1 of equipment is inside and outside while heated.It, instead can be from outer roller 2 to its not only there is no heat dissipation for inner roller 1
Heat is inputted, so that the drying efficiency of wet mud greatly improves.Experiments have shown that the sludge drying relative to segmented is granulated
For, the device of the invention can be such that the efficiency of sludge drying improves from the 60-80% of original segmented to 90-98%,
In sludge situation identical with the heat exchange reaction elapsed-time standards of flue gas, nested type sludge at low temperature desiccation is low compared to segmented sludge
The output increased 40-60% of warm desiccation.
Above-mentioned embodiment is only a preferred solution of the present invention, so it is not intended to limiting the invention.Have
The those of ordinary skill for closing technical field can also make various changes without departing from the spirit and scope of the present invention
Change and modification.Therefore all mode technical solutions obtained for taking equivalent substitution or equivalent transformation, all fall within guarantor of the invention
It protects in range.
Claims (10)
1. a kind of nested type sludge at low temperature desiccation and prilling granulator, which is characterized in that including inner roller (1) and outer roller (2), institute
The outer roller (2) stated coaxially is nested in outside inner roller (1), and forms toroidal cavity between two rollers；Inner roller (1) and outer
Roller (2) is driven by driving device to be rotated；The inner wall of the inner roller (1) is equipped with several rows along the circumferential cloth of inner roller (1)
If lifting blade (6), all lifting blades (6) in every row's lifting blade (6) are in the front end of inner roller (1) to uniformly arranging between rear end
Column；The inner wall of every piece of lifting blade (6) prominent inner roller (1), for driving sludge to turn together in inner roller (1) rotation process
It is dynamic, and sludge is fallen again when going to top area；Inner roller (1) front end is equipped with the first air inlet (3) and dirty
Mud feed inlet (4), rear end bottom surface are equipped with the first sludge discharge hole (7), and first sludge discharge hole (7) is connected to inner roller
(1) and the toroidal cavity；It is equipped at sludge inlet (4) for dispersing to sewage sludge feed in inner roller (1)
Sludge disperser (5)；Outer roller (2) inner wall is equipped with one or more sludge mobile guide plate (9), the dirt
Mud mobile guide plate (9) is the guide plate extended in a spiral form from outer roller (2) rear end forward end；The outer roller (2)
Front end is equipped with the second air inlet (10), and front end bottom surface is equipped with the second sludge discharge hole (12), after inner roller (1) and outer roller (2)
End is equipped with gas outlet (11).
2. nested type sludge at low temperature desiccation as described in claim 1 and prilling granulator, which is characterized in that every piece of lifting blade (6)
Mounting plane and the inclined angle of inner roller (1) axial line, and inner roller (1) drive lifting blade (6) it is inside by inner bottom surface
In the rotary course of top surface, lifting blade (6) forms a slope, makes sludge on slope to close to inner roller (1) rear end one
Sideslip falls.
3. nested type sludge at low temperature desiccation as described in claim 1 and prilling granulator, which is characterized in that the inner roller
(1) support is fixed by several support rods (8) between outer roller (2).
4. nested type sludge at low temperature desiccation as described in claim 1 and prilling granulator, which is characterized in that the inner roller
(1) it is fixed on same central axis with outer roller (2), synchronous rotary.
5. nested type sludge at low temperature desiccation as claimed in claim 4 and prilling granulator, which is characterized in that the central axis by
Driving device driving rotation.
6. nested type sludge at low temperature desiccation as described in claim 1 and prilling granulator, which is characterized in that the driving device
For frequency modulation motor.
7. nested type sludge at low temperature desiccation as described in claim 1 and prilling granulator, which is characterized in that the inner roller
(1) and outer roller (2) rear end shares the same gas outlet (11).
8. nested type sludge at low temperature desiccation as described in claim 1 and prilling granulator, which is characterized in that the inner roller
(1) barrel diameter is 1.5~3.0m, a length of 8~25m.
9. nested type sludge at low temperature desiccation as described in claim 1 and prilling granulator, which is characterized in that the outer roller
(2) barrel diameter is 3.0~5.0m, a length of 8~25m.
10. a kind of existed using desiccation as described in claim 1 and the sludge at low temperature desiccation of prilling granulator and prilling process, feature
In steps are as follows:
It drives inner roller (1) and outer roller (2) to press the revolving speed set incessantly rotationally clockwise by driving device, contains
Water rate is continuously fed into inner roller (1) from 80% or more wet mud by the sludge inlet (4) above front end, hot cigarette
Gas is continuously fed into inner roller (1) by first air inlet (3) of inner roller (1) front end, directly contacted with wet mud into
Row heat exchange reaction, under the collective effect of sludge disperser (5) and lifting blade (6), make the moisture content of sludge be down to 60% with
Under, then fallen into the rear end of outer roller (2) from first sludge discharge hole (7) of inner roller (1) rear end；In outer roller (2),
The sludge fallen from inner roller (1) is pushed using sludge mobile guide plate (9), it is mobile from rear end forward end；Simultaneously by hot fume
It is sent into outer roller (2) from the second air inlet (10), in the toroidal cavity between outer roller (2) and inner roller (1), makes hot cigarette
Gas and sludge continue directly to contact progress heat exchange reaction, when the moisture content of sludge be down to 40% or less and self-assembling formation partial size be
2-8 millimeters of mud granule cools down it from the second sludge discharge hole (12) output below front end, and mud granule is cooling
When to room temperature, moisture content is down to < 30%, and volume is reduced to the one third of original volume hereinafter, and saving 95% original calorific value；
Flue tail gas after sludge drying is taken out by air-introduced machine from the gas outlet (11) of inner roller (1) and outer roller (2) rear end
Out, after being dusted processing, qualified discharge.
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| WO2020211506A1 (en) * | 2019-04-15 | 2020-10-22 | 浙江大学 | Nested sludge low-temperature drying and granulation device and method thereof |
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|---|---|---|---|---|
| CN105152512A (en) * | 2015-08-31 | 2015-12-16 | 杭州新源环境工程有限公司 | Sludge drying and granulating integrated system with double-layered structure and method of sludge drying and granulating integrated system |
| CN208717138U (en) * | 2018-08-31 | 2019-04-09 | 青岛颐美盛投资有限公司 | A kind of two-layer cylinder sludge carbonization device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152512A (en) * | 2015-08-31 | 2015-12-16 | 杭州新源环境工程有限公司 | Sludge drying and granulating integrated system with double-layered structure and method of sludge drying and granulating integrated system |
| CN208717138U (en) * | 2018-08-31 | 2019-04-09 | 青岛颐美盛投资有限公司 | A kind of two-layer cylinder sludge carbonization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020211506A1 (en) * | 2019-04-15 | 2020-10-22 | 浙江大学 | Nested sludge low-temperature drying and granulation device and method thereof |
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