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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
roller
sludge
low temperature
desiccation
nested type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910300879.4A
Other languages
Chinese (zh)
Inventor
翁焕新
苏闽华
张微
陈海燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN201910300879.4A priority Critical patent/CN110204169A/en
Publication of CN110204169A publication Critical patent/CN110204169A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D49/00Separating dispersed particles from gases, air or vapours by other methods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/302Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue 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

The desiccation of nested type sludge at low temperature and prilling granulator and its method
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.
CN201910300879.4A 2019-04-15 2019-04-15 The desiccation of nested type sludge at low temperature and prilling granulator and its method Pending CN110204169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910300879.4A CN110204169A (en) 2019-04-15 2019-04-15 The desiccation of nested type sludge at low temperature and prilling granulator and its method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910300879.4A CN110204169A (en) 2019-04-15 2019-04-15 The desiccation of nested type sludge at low temperature and prilling granulator and its method

Publications (1)

Publication Number Publication Date
CN110204169A true CN110204169A (en) 2019-09-06

Family

ID=67785449

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910300879.4A Pending CN110204169A (en) 2019-04-15 2019-04-15 The desiccation of nested type sludge at low temperature and prilling granulator and its method

Country Status (1)

Country Link
CN (1) CN110204169A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020211506A1 (en) * 2019-04-15 2020-10-22 浙江大学 Nested sludge low-temperature drying and granulation device and method thereof

Citations (2)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020211506A1 (en) * 2019-04-15 2020-10-22 浙江大学 Nested sludge low-temperature drying and granulation device and method thereof

Similar Documents

Publication Publication Date Title
CN101823825B (en) Sludge dehydrating and drying process method and device
CN102381877B (en) Method for brickmaking by comprehensive utilization of desiccated sludge
CN110066089A (en) Inserted sludge at low temperature desiccation and prilling granulator and its method
CN103964671B (en) A kind of mud drying device and utilize the method for this device dewatered sludge
CN105399304B (en) Biological sludge drying and incineration circulation process method and its complete set of equipments
CN103145307A (en) High temperature carbonization system of sludge and carbonization process
CN101216244A (en) Spiral and rotary type sludge drying shaping apparatus
CN102173554B (en) System for drying and handling sludge with waste gas from cement production
CN106380056B (en) The makeup of municipal sludge depth drying is set
CN110204169A (en) The desiccation of nested type sludge at low temperature and prilling granulator and its method
CN102086082B (en) Rotary sludge treatment system and treatment process thereof
CN102173553A (en) Method for drying and processing sludge by use of cement production waste gas
CN105670656A (en) Device and process for pyrolysis gasification treatment of sludge by circulating fluidized bed pyrolysis gasifier
CN205575906U (en) Sludge drying system
CN103435243B (en) Parallel sludge low-temperature drying system utilizing waste heat of flue gas
CN106116000B (en) It is a kind of it is main using biomass material by the method for industrial wastes taste removal, turning sludge into fuel and recycling
CN202692637U (en) Drum dryer used for producing organic fertilizers
CN210176701U (en) System for municipal sludge deep reduction treatment
CN102557378B (en) Sludge drying process
CN110242971A (en) A kind of incineration tail gas system using burning domestic garbage drying compost
CN105152512A (en) Sludge drying and granulating integrated system with double-layered structure and method of sludge drying and granulating integrated system
CN202968331U (en) Sludge incinerator
CN206940706U (en) A kind of smoke sludge drying machine
CN206843398U (en) A kind of sludge cooperates with innocuity disposal system with stalk
CN103162299B (en) A kind of for zymogenic adding set in house refuse pretreatment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination