CN108409092A - The sludge at low temperature anhydration system utilized based on Multi-stage heat - Google Patents
The sludge at low temperature anhydration system utilized based on Multi-stage heat Download PDFInfo
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- CN108409092A CN108409092A CN201810217212.3A CN201810217212A CN108409092A CN 108409092 A CN108409092 A CN 108409092A CN 201810217212 A CN201810217212 A CN 201810217212A CN 108409092 A CN108409092 A CN 108409092A
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- 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
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- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- 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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
- F26B23/06—Heating arrangements using electric heating resistance heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The invention discloses a kind of sludge at low temperature anhydration systems utilized based on Multi-stage heat, including annealing device, guiding device, dehydration device, drying device, low temperature desiccation apparatus and exhaust gas processing device.Former mud is heated in annealing device, and flowing through drying device through guiding device enters dehydration device.Drying device includes hot sludge pipeline and sludge conveying device；Dehydration device includes agitator, plate and frame filter press and pulverizer, and sludge can improve in agitator（It is optional）, plate and frame filter press dehydration can be also flowed directly into, dewatered sludge sends sludge conveying device back to after being pulverized, exchanges heat with the heating sludge in hot sludge pipeline；The tail gas being discharged from drying device enters exhaust gas processing device, and purified tail gas is passed through low temperature desiccation apparatus, is passed through in drying device again after tail gas is heated, and desiccation is carried out to the dewatered sludge in sludge conveying device.The present invention reduces pollutant emission by Multi-stage heat using reduction energy consumption, and using low temperature desiccation, environmentally friendly.
Description
Technical field
The present invention relates to sludge drying processing technology fields, and in particular to a kind of sludge at low temperature utilized based on Multi-stage heat is dry
Change system.
Technical background
With the development of economy with the process of urbanization, the yield of China's municipal sludge also increases considerably, the nothing of sludge
Evilization, minimizing processing have become current environment hot issue.And the moisture percentage in sewage sludge one that traditional mechanical dehydration obtains
As 75% ~ 85%, the standard of subsequent processing cannot be met.It therefore, just must be into if to further decrease the moisture content of sludge
Row heat drying.
In sludge drying processing technology field, Chinese patent application CN201410536566.6 discloses a kind of sludge drying
Stage apparatus, using hot water by radiator and air heat-exchange, reusable heat air dries sludge, and manufacturing cost is low, uses letter
It is single, however due to not carrying out Multi-class propagation to heat, energy consumption is larger, system operation high expensive.
Chinese patent application CN200920062589.2 discloses a kind of compound heating disc-type sludge drying machine, in common disk
Waste hot steam and high-temperature flue tail gas are imported to dry sludge simultaneously on the basis of formula desiccation machine, and drying efficiency is higher；But compared with
High desiccation temperature can lead to the increase of pollutant discharge amount, and secondary hazards are generated to environment.
Chinese patent application CN201210194963.0 discloses a kind of combined solar energy heat pump sludge drying system and dry
Change method carries out desiccation, uses heat pump as standby heat source using solar energy heating water and with air heat-exchange, reusable heat air.Though
Cost has so been saved, but heat causes drying efficiency to be declined by repeatedly transmission, drying time increases.
Chinese patent application CN201710590244.3 discloses a kind of sludge drying system based on cascaded utilization of energy,
The system is used in combination the hot water that disk anhydration system generates to heat the sludge in press filteration system, is promoted using hot steam as heat source
Energy utilization efficiency, but power plant, boiler factory is depended on to provide heat source simultaneously, there are certain territory restriction.
In conjunction with above-mentioned documents, and pass through the global analysis to the prior art, that is, sludge drying the relevant technologies, applicant
It was found that conventional at present sludge drying method and relevant device the main problems are as follows：
1. using waste hot steam, conduction oil etc. as heat source at high temperature（180-200℃）Desiccation is carried out, energy consumption is higher, increases
Desiccation cost.
2. high temperature desiccation will produce a large amount of sulfur-bearing nitrogen-containing pollutants, when work, can discharge foul gas, and two are caused to environment
Secondary pollution, loses more than gain.
3. dried medium temperature is low, with material it is insufficient contact etc. due to, lead to that drying efficiency is relatively low, drying time
Increase.
4. dried medium uses waste heat flue gas, saturated vapor etc. to be used as heat source more, power plant and boiler factory are depended on, in technology
There are certain territory restrictions on.
Invention content
In order to overcome variety of problems of the existing technology, the present invention provides a kind of efficiency of utilization, and high, pollutant is arranged
Put less, desiccation effect it is good, and odorless free of contamination sludge at low temperature anhydration system.
The invention is realized by the following technical scheme, a kind of sludge at low temperature anhydration system utilized based on Multi-stage heat, including
Annealing device, guiding device, dehydration device, drying device, low temperature desiccation apparatus and exhaust gas processing device；The heat treatment dress
It sets including heater, feed inlet and thermostat；The guiding device includes control valve, electric pump and diversion pipeline；It is described
Drying device includes hot sludge pipeline and sludge conveying device, and the low temperature desiccation apparatus includes air source heat pump, the tail gas
Processing unit includes clarifier and dehumidifier.Former mud is heated in annealing device, forms heating sludge, the heating sludge
Hot sludge pipeline is flowed through through diversion pipeline, enters back into dehydration device.The dehydration device includes plate and frame filter press and pulverizer, warp
The dewatered dewatered sludge of plate and frame filter press is sent into after pulverizer crushes and sends sludge conveying device back to, with adding in hot sludge pipeline
Hot sludge heat exchange.The tail gas and vapor being discharged from drying device enter exhaust gas processing device and are purified and dehumidified, after purification
Tail gas be passed through low temperature desiccation apparatus, after air source heat pump heats, be passed through in drying device again, in sludge conveying device
Dewatered sludge carry out desiccation, constitute circulation of tail gas.
Preferably, above-mentioned sludge conveying device includes multi-stage heat exchanger disk and the rake that is set to above the heat exchange plate, dehydration
Sludge is placed in the heat exchange plate, and the rake stirs dewatered sludge under motor drive；And the heat exchange plate has cavity, it is described
Hot sludge pipeline includes the cavity, and the cavity is connected to the guiding device, and heating sludge passes through the guiding device stream
Heat exchange can be carried out after entering the cavity with the dewatered sludge in the heat exchange plate.
Preferably, above-mentioned sludge conveying device includes multiple conveyer, and the hot sludge pipeline includes heat exchanger tube；Dehydration is dirty
Mud is placed on the multiple conveyer, and the heat exchanger tube is located at per level-one conveyer belt lower section and is close to conveyer belt, and heating sludge is logical
Heat exchange can be carried out with the dewatered sludge per on level-one conveyer belt by crossing after the guiding device flows into the heat exchanger tube.
Preferably, above-mentioned sludge conveying device includes transmission shaft and the multistage blade that is set on the transmission shaft；It is described
Transmission shaft rotates under motor drive, and multistage blade is driven to stir dewatered sludge；The transmission shaft and drying device shell
Inner wall is in hollow structure, forms cavity；The hot sludge pipeline includes the cavity, and the cavity connects with the guiding device
Logical, heating sludge can carry out heat exchange after flowing into the cavity by the guiding device with dewatered sludge.
Preferably, the annealing device can be closed rectangular parallelepiped structure, and heater heating method used can be
Resistant heating, solar energy heating or microwave heating.
Preferably, the diversion pipeline symmetry arrangement in the guiding device is in the both sides of drying device；Diversion pipeline is equipped with
Several branch pipes, and each branch pipe is connected with the hot sludge pipelines at different levels in drying device respectively.
It is furthermore preferred that the dehydration device further includes agitator, and blender is dasher in the agitator, is not had
Agitator can remove when having conditioning demand, and sludge is introduced directly into plate and frame filter press.Sludge can select stirring as needed
It is improved in bucket, or skips conditioning part（Agitator is not needed）, flow directly into plate and frame filter press and be dehydrated.
Preferably, the drying device is rectangular parallelepiped, and side wall is equipped with insulating layer.
Preferably, the low temperature desiccation apparatus includes air source heat pump, can be by purified tail gas heating to 60-100
℃。
Preferably, the clarifier in the exhaust gas processing device is using spray tower structure, internal spray faintly acid or weak base
Property cleaning solution carry out gas washing.
On the other hand, the present invention provides using a kind of above-mentioned sludge at low temperature anhydration system utilized based on Multi-stage heat into
The method of row sludge at low temperature desiccation, specifically includes：
（1）Sludge is heated as indirectly drying heat source
Other heating sources are replaced with the heating sludge for carrying amount of heat in drying device, desiccation is carried out to dewatered sludge：
Former mud becomes carrying the heating sludge of amount of heat in annealing device after 40-120 DEG C of heat treatment（45-100
℃）, imported by guiding device in the hot sludge pipeline of the drying device, and with its be dehydrated after the dewatered sludge that is formed into
Row heat exchange reaches desiccation purpose, and generates tail gas and vapor；The heating sludge of dissipated heat is imported by guiding device de- again
Water installations reduce desiccation energy consumption it is thus achieved that the multi-stage, efficient of heat utilizes in heat treatment, save operation cost.
（2）Air source heat pump is as secondary desiccation heat source
Using air source heat pump by the purified tail gas heating of exhaust gas processing device to 60-100 DEG C, hot cleaning of off-gas again with
Dewatered sludge carries out heat exchange and takes away the vapor in drying device, makes dewatered sludge desiccation.Tail gas and vapor flow into tail
Flash Gas Compression Skid System is purified and is dehumidified, and leads back to low temperature anhydration system, constitutes circulation of tail gas.Air source heat pump is as secondary warm
Source achievees the effect that low temperature desiccation, to reduce pollutant with the heating sludge synergistic effect as indirectly drying heat source
Release；Two kinds of heat source collective effects simultaneously rapid evaporation and can take away the moisture in sludge, improve drying efficiency.
The course of work of the present invention is as follows：
First, the former mud that moisture content is 99% is imported from the feed inlet of annealing device in heater, starts heat source（Resistance wire
Heating, solar energy heating or microwave heating technique）Hot conditioning is carried out to former mud at a temperature of 45-120 DEG C, realizes first order heat profit
With.The control valve for opening guiding device, allows the heating sludge with higher temperature（45-100℃）Entered by diversion pipeline dry
Hot sludge pipeline in dry device；Sludge is heated along hot sludge tube runs, and with the dehydration sent back in drying device
Sludge carries out heat exchange, achievees the purpose that desiccation, realizes second level heat utilization.The heating sludge of dissipated heat is via guiding device
It is pooled to dehydration device.In order to further enhance the dewatering of sludge, certain chemistry can be put into sludge before dehydration
Drug carries out chemical conditioning：Calcium oxide, Fenton reagent, sawdust or rice husk are added first in agitator to be modified sludge,
Then make conditioner using physical means such as stirrings and sludge is sufficiently mixed, the reaction was complete, then improve sludge along diversion pipe
Road flows into plate and frame filter press and carries out mechanical dehydration；Sludge can not also carry out chemical conditioning（The participation of agitator is not needed）, from
And it is introduced directly into plate and frame filter press and carries out mechanical dehydration.Dewatered sludge of the obtained moisture content between 75%-85% is in pulverizer
After crushing, drying device is directly sent back to by the feed inlet of drying device, falls on and carries out desiccation on sludge conveying device, dewatered sludge from
Bottom dropped out triggers gravity sensing device to discharge port after running up to 1000kg, and discharge port automatically opens, and dewatered sludge falls into receipts
It is carried away in header.At the same time, air source heat pump work makes purified tail gas heat up, and will by the aerofoil fan on the left side
Cleaning of off-gas after heating（60-100℃）It is constantly blown into drying device, accelerates the evaporation of residual moisture in dewatered sludge, and
Take away the vapor in drying device.The aerofoil fan on the right by drying device tail gas and vapor import clarifier,
It is purified under the action of weak acid or weak caustic solution, enters dehumidifier later, then send low temperature drying device back to, constitute circulation of tail gas.
Contain as under the heating sludge of contact drying heat source and the collective effect of air source heat pump, system works to can be obtained for 1-2 hours
Water rate is down to the dewatered sludge of 10%-20%.
The characteristics of mud drying device of the present invention, is：
1, using after heat treatment have higher temperature（45-100℃）Heating sludge as indirectly drying heat source, not only realize
Cool down to sludge before conditioning, be also obviously improved the efficiency of utilization of whole system, reduce the operation of system at
This.
2, joint air source heat pump heats sludge as second heat source, and dual heat source collective effect improves dry
Change efficiency, shortens the time needed for sludge drying.
3, whole system carries out desiccation using 45-100 DEG C of low temperature, significantly reduces the life of pollutant in drying process
At environmentally friendly.
4, system operation relies primarily on electric energy, and dried medium uses hot sludge and air source heat pump, and there is no regions to limit
System.
Description of the drawings
Fig. 1 is a kind of overall schematic of the sludge at low temperature anhydration system utilized based on Multi-stage heat of the present invention；
Wherein, corresponding number designation is respectively：1, annealing device, 2, diversion pipeline one, 3, drying device, 4, diversion pipeline
Two, 5, agitator, 6, plate and frame filter press, 7, pulverizer, 8, dehumidifier, 9, clarifier, 10, exhaust pipe one, 11, exhaust pipe
Two, 12, exhaust pipe three, 13, air source heat pump.
Fig. 2 is the partial schematic diagram of the embodiment of the present invention 1；
Wherein, corresponding number designation is respectively：101, resistance wire, 102, auto temperature controlled system one, 103, feed inlet one, 301,
Multi-stage heat exchanger disk, 302, discharge port one, 303, aerofoil fan one, 304, feed inlet two, 305, rake, 306, aerofoil fan two.
Fig. 3 is the partial schematic diagram of the embodiment of the present invention 2；
Wherein, corresponding number designation is respectively：104, feed inlet three, 105, auto temperature controlled system two, 106, solar energy heating
Device, 307, discharge port two, 308, heat exchanger tube, 309, multiple conveyer, 310, aerofoil fan three, 311, feed inlet four, 312, axis
Flow fan four.
Fig. 4 is the partial schematic diagram of the embodiment of the present invention 3；
Wherein, corresponding number designation is respectively：107, feed inlet five, 108, auto temperature controlled system three, 109, microwave conditioner,
313, multistage blade, 314, transmission shaft, 315, discharge port three, 316, aerofoil fan five, 317, drying device shell, 318, charging
Mouth six, 319, aerofoil fan six.
Specific implementation mode
With reference to embodiment and compares attached drawing the present invention is described in further details.
Embodiment 1
A kind of disc type sludge at low temperature anhydration system utilized based on Multi-stage heat is adjusted using Resistant heating as mode of heating
Oxidation calcon is added when reason as conditioner.Fig. 1 is the schematic diagram of whole system, and Fig. 2 is the partial schematic diagram of embodiment 1.
Whole system includes annealing device, guiding device, dehydration device, drying device, low temperature desiccation apparatus and exhaust gas processing device；
The annealing device 1 is equipped with resistance wire 101, auto temperature controlled system 1 and feed inlet 1；The guiding device includes
Diversion pipeline 1 and diversion pipeline 24 are both equipped with 4 branch pipes, and symmetry arrangement is in drying device both sides.The dehydration
Device includes agitator 5, plate and frame filter press 6 and pulverizer 7；3 top of drying device of the disc type sludge drying system is set
There are aerofoil fan 1, aerofoil fan 2 306 and feed inlet 2 304, middle part to be equipped with multi-stage heat exchanger disk 301 and rake 305, lower part
Equipped with discharge port 1；Exhaust gas processing device, including dehumidifier 8, clarifier 9 and exhaust pipe 1, dehumidifier 8 pass through tail
Feed channel 2 11 is connected to air source heat pump 13.Air source heat pump 13 is connected to by exhaust pipe 3 12 with drying device 3.
First, the former mud that moisture content is 99% is imported from the feed inlet 1 of annealing device in heating device 1, is started
Heat source, pre- hot water radiation wire 101 simultaneously carry out hot conditioning to former mud at 120 DEG C, realize first order heat utilization.Open the control of guiding device
Valve processed, allows with higher temperature（45-100℃）Heating sludge by diversion pipeline 1 enter drying device；It is suitable to heat sludge
It diversion pipeline 1 and flows into hollow multi-stage heat exchanger disk 301, and hot friendship is carried out with the dewatered sludge on multi-stage heat exchanger disk 301
It changes, achievees the purpose that desiccation, realize second level heat utilization.The sludge of dissipated heat is pooled to dehydration dress via diversion pipeline 24
Set, calcium oxide be added first in agitator 5 and chemical conditioning and be stirred continuously, be sufficiently mixed, after the reaction was complete again along
Diversion pipeline 24 flows into plate and frame filter press 6 and carries out mechanical dehydration；The dewatered sludge that obtained moisture content is 75% is in 7 powder of pulverizer
After broken, drying device is directly added by the feed inlet of drying device 304, falls on and carries out desiccation on multi-stage heat exchanger disk 301, rake 305
It is constantly stir-fried back and forth to sludge by motor drive.Dewatered sludge is from bottom dropped out to discharge port 1,1000kg to be run up to
After trigger gravity sensing device, discharge port 1 automatically opens, and dewatered sludge falls into collecting box and is carried away.At the same time, air
The work of source heat pump 13 makes purified tail gas heat up, and by the aerofoil fan on the left side 2 306 by the cleaning of off-gas of heat（60-100
℃）It is constantly blown into drying device, accelerates the evaporation of residual moisture in dewatered sludge, and take away the vapor in drying device.
The aerofoil fan 1 on the right is by the tail gas and vapor importing clarifier 9 in drying device, in weak acid or the work of weak caustic solution
With lower purification, enter dehumidifier 8 later, then send air source heat pump 13 back to, air source heat pump 13 will be after purified tail gas heating
It imports in drying device 3, constitutes circulation of tail gas.In the common work of hot sludge and air source heat pump 13 as contact drying heat source
Under, system works 1 hour and can be obtained the dewatered sludge that moisture content is down to 20%.
Embodiment 2
A kind of belt type sludge low temperature anhydration system utilized based on Multi-stage heat, using solar energy as mode of heating, sludge is not required to
Improve and directly carries out mechanical dehydration.Fig. 1 is the schematic diagram of whole system, and Fig. 3 is the partial schematic diagram of embodiment 2.It is whole
A system includes annealing device, guiding device, dehydration device, drying device, low temperature desiccation apparatus and exhaust gas processing device；Institute
It states annealing device 1 and is equipped with feed inlet 3 104, auto temperature controlled system 2 105 and solar thermal collector 106；The guiding device
Include mainly diversion pipeline 1 and diversion pipeline 24, is both equipped with 4 branch pipes, and symmetry arrangement is in the two of drying device
Side.The dehydration device is made of plate and frame filter press 6 and pulverizer 7（Due to that need not be improved, agitator 5 is from system
Removal, diversion pipeline 24 are directly connected to plate and frame filter press 6）；3 top of drying device of the belt type sludge desiccation apparatus is equipped with
Feed inlet 4 311, aerofoil fan 3 310 and aerofoil fan 4 312, middle part are equipped with heat exchanger tube 308 and multiple conveyer 309, under
Portion is equipped with discharge port 2 307；Exhaust gas processing device, including dehumidifier 8, clarifier 9 and exhaust pipe 1, dehumidifier 8 pass through
Exhaust pipe 2 11 is connected to air source heat pump 13.Air source heat pump 13 is connected to by exhaust pipe 3 12 with drying device 3.
First, the former mud that moisture content is 99% is imported from the feed inlet 3 104 of annealing device in heating device, the sun
Energy collecting plate 106 collects the energy in sunlight and carries out hot conditioning to former mud at 100 DEG C, realizes first order heat utilization.It opens
The control valve of guiding device, allows with higher temperature（45-100℃）Heating sludge pass through diversion pipeline 1 and enter dry fill
It sets；Heat exchanger tube 308 in drying device is located at per level-one conveyer belt lower section and is close to conveyer belt, and heating sludge is along drying device
In heat exchanger tube 308 slowly flow, in the process on multiple conveyer 309 dewatered sludge carry out heat exchange, reach dry
The purpose of change realizes second level heat utilization.The sludge of dissipated heat is pooled to dehydration device via diversion pipeline 24, along leading
Flow tube road 24 flows into plate and frame filter press 6 and carries out mechanical dehydration；The dewatered sludge that obtained moisture content is 85% is crushed in pulverizer 7
Afterwards, it sends sludge conveying device back to, drying device is added by the feed inlet 4 311 of drying device, it is enterprising to fall on multiple conveyer 309
Row desiccation；Multiple conveyer 309 is driven by motor and is slowly run, and sludge constantly falls on lower conveyer belt from higher conveyer belt
On, last dewatered sludge triggers gravity sensing device, discharge port two from bottom dropped out to discharge port 307 after running up to 1000kg
307 automatically open, and dewatered sludge falls into collecting box and is carried away.At the same time the work of air source heat pump 13 makes purified tail gas liter
Temperature, and by the aerofoil fan on the left side 4 312 by heat cleaning of off-gas（60-100℃）It is constantly blown into drying device, accelerates de-
The evaporation of residual moisture in sewage sludge, and take away the vapor in drying device.The aerofoil fan 3 310 on the right is by drying device
In tail gas and vapor import clarifier 9, purified under the action of weak acid or weak caustic solution, enter dehumidifier 8 later, then send
Make the return trip empty air supply heat pump 13, and air source heat pump 13 will import after purified tail gas heating in drying device 3, constitute circulation of tail gas.
Under the collective effect as the hot sludge of contact drying heat source and air source heat pump 13, system works 1.5 hours and can be obtained
Moisture content is down to 15% dewatered sludge.
Embodiment 3
A kind of oar blade type sludge at low temperature anhydration system utilized based on Multi-stage heat, it is dirty using microwave combustion method as mode of heating
After mud is improved using sawdust, then carry out mechanical dehydration.Fig. 1 is the schematic diagram of whole system, and Fig. 4 is the part of embodiment 3
Schematic diagram.Whole system includes at annealing device, guiding device, dehydration device, drying device, low temperature desiccation apparatus and tail gas
Manage device；The annealing device 1 is equipped with feed inlet 5 107, auto temperature controlled system 3 108 and microwave conditioner 109；It is described to lead
Stream device is mainly diversion pipeline 1 and diversion pipeline 24, is both equipped with 1 branch pipe, and symmetry arrangement is in drying device
Both sides.The dehydration device includes agitator 5, plate and frame filter press 6 and pulverizer 7；The oar blade type mud drying device is done
3 top of dry device is equipped with feed inlet 6 318, aerofoil fan 5 316 and aerofoil fan 6 319, and middle part is equipped with transmission shaft 314 and more
Grade blade 313, transmission shaft 314 are hollow structure；Lower part is equipped with discharge port 3 315, and the inner wall of the shell 317 of drying device is double
Layer cavity structure；Exhaust gas processing device, including dehumidifier 8, clarifier 9 and exhaust pipe 1, dehumidifier 8 pass through another tail gas
Pipeline 2 11 is connected to air source heat pump 13.Air source heat pump 13 is connected to by exhaust pipe 3 12 with drying device 3.
First, the former mud that moisture content is 99% is imported from the feed inlet 5 107 of annealing device in heating device, is started
Microwave conditioner 109 carries out hot conditioning at 45 DEG C to former mud, realizes first order heat utilization.The control valve for opening guiding device, allows
45-100 DEG C of heating sludge enters drying device by diversion pipeline 1；It is hollow along the inflow of diversion pipeline 1 to heat sludge
Transmission shaft 314 and drying device shell 317 inner wall, and in drying device dewatered sludge carry out heat exchange, reach
The purpose of desiccation realizes second level heat utilization.The sludge of dissipated heat is pooled to dehydration device via diversion pipeline 24, first
Sawdust is added in agitator 5 chemical conditioning and be stirred continuously, be sufficiently mixed, after the reaction was complete again along diversion pipeline two
4, which flow into plate and frame filter press 6, carries out mechanical dehydration；The dewatered sludge that obtained moisture content is 80% is after the crushing of pulverizer 7, directly
Drying device is added by the feed inlet 6 318 of desiccation apparatus；Transmission shaft 314 and multistage blade 313 are by motor band in drying device
Dynamic be stirred continuously stirs sludge, and is carried out at the same time heat exchange, reaches desiccation effect.Dewatered sludge from bottom dropped out to discharge port 3 315,
Gravity sensing device is triggered after running up to 1000kg, discharge port 3 315 automatically opens, and dewatered sludge falls into collecting box and transported
It walks.At the same time the work of air source heat pump 13 makes purified tail gas heat up, and by the aerofoil fan on the left side 6 319 by heat
Cleaning of off-gas（60-100℃）It is constantly blown into drying device, accelerates the evaporation of residual moisture in dewatered sludge, and take away drying
Vapor in device.The aerofoil fan 5 316 on the right is by the tail gas and vapor importing clarifier 9 in drying device, weak
It is purified under the action of acid or weak caustic solution, enters dehumidifier 8 later, then send air source heat pump 13 back to, air source heat pump 13 will be net
It is imported in drying device 3 after tail gas heating after change, constitutes circulation of tail gas.In the hot sludge and air as contact drying heat source
Under the collective effect of source heat pump 13, system works 2 hours and can be obtained the dewatered sludge that moisture content is down to 10%.
Be above to the present invention is based on Multi-stage heat using sludge at low temperature anhydration system carry out elaboration, be used to help understand
The present invention, but embodiment of the present invention are not limited by the above embodiments, it is any without departing from made by under the principle of the invention
Changes, modifications, substitutions, combinations, simplifications should be equivalent substitute mode, be included within the scope of the present invention.
Claims (6)
1. a kind of sludge at low temperature anhydration system utilized based on Multi-stage heat, including annealing device, guiding device, dehydration device,
Drying device, low temperature desiccation apparatus and exhaust gas processing device；The annealing device includes heater, feed inlet and automatic temperature-controlled
System；The guiding device includes control valve, electric pump and diversion pipeline；The drying device includes that hot sludge pipeline and sludge pass
Send device；The low temperature desiccation apparatus includes air source heat pump；The exhaust gas processing device includes clarifier and dehumidifier；Former mud
It being heated in annealing device, forms heating sludge, the heating sludge flows through hot sludge pipeline through diversion pipeline, then into
Enter dehydration device；The dehydration device includes plate and frame filter press and pulverizer, is sent through the dewatered dewatered sludge of plate and frame filter press
Enter after pulverizer crushes and send sludge conveying device back to, exchanges heat with the heating sludge in hot sludge pipeline；It is discharged from drying device
Tail gas and vapor enter exhaust gas processing device and are purified and dehumidified, and purified tail gas is passed through low temperature desiccation apparatus, through sky
It after air supply heat pump heating, is passed through in drying device again, desiccation is carried out to the dewatered sludge in sludge conveying device.
2. the sludge at low temperature anhydration system according to claim 1 utilized based on Multi-stage heat, it is characterised in that：The sludge
Transmission device includes multi-stage heat exchanger disk and the rake that is set to above the heat exchange plate；Dewatered sludge is placed in the heat exchange plate, institute
It states rake and stirs dewatered sludge under motor drive；The heat exchange plate has cavity, and the hot sludge pipeline includes the cavity, institute
It states cavity to be connected to the guiding device, heating sludge is flowed by the guiding device can be with the heat exchange plate after the cavity
On dewatered sludge carry out heat exchange.
3. the sludge at low temperature anhydration system according to claim 1 utilized based on Multi-stage heat, it is characterised in that：The sludge
Transmission device includes multiple conveyer, and the hot sludge pipeline includes heat exchanger tube；Dewatered sludge is placed on the multiple conveyer,
The heat exchanger tube is located at per level-one conveyer belt lower section and is close to conveyer belt, and heating sludge described in guiding device inflow by changing
Heat exchange can be carried out after heat pipe with the dewatered sludge per on level-one conveyer belt.
4. the sludge at low temperature anhydration system according to claim 1 utilized based on Multi-stage heat, it is characterised in that：The sludge
Transmission device includes transmission shaft and the multistage blade that is set on the transmission shaft；The transmission shaft rotates under motor drive,
Multistage blade is driven to stir dewatered sludge；The inner wall of the transmission shaft and drying device shell is in hollow structure, is formed empty
Chamber；The hot sludge pipeline includes the cavity, and the cavity is connected to the guiding device, and heating sludge passes through the water conservancy diversion
Device can carry out heat exchange after flowing into the cavity with dewatered sludge.
5. the sludge at low temperature anhydration system according to claim 1 utilized based on Multi-stage heat, it is characterised in that：The dehydration
Device further includes agitator, and the agitator is arranged in sheet frame filtering pressure machine front end.
6. using as described in claim 1 to 5 based on Multi-stage heat using sludge at low temperature anhydration system to carry out a kind of sludge low
The method of warm desiccation, specific steps include：
（1）After former mud is heat-treated, the heating sludge that temperature is 45 DEG C -100 DEG C is formed；
（2）With above-mentioned steps（1）The heating sludge is as heat source, and the dewatered sludge formed after being dehydrated with it is in drying device
Middle carry out heat exchange makes dewatered sludge desiccation, and generates tail gas and vapor；
（3）It will be purified to add by the purified tail gas heating of exhaust gas processing device to 60-100 DEG C using air source heat pump
Hot exhaust gas carries out heat exchange with dewatered sludge and takes away the vapor in drying device again, makes dewatered sludge desiccation.
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| CN109944738A (en) * | 2019-04-11 | 2019-06-28 | 西华大学 | Vertical shaft wind Force system |
| CN112197540A (en) * | 2020-10-25 | 2021-01-08 | 贾雨凝 | New forms of energy drying device |
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| CN106242233A (en) * | 2016-08-30 | 2016-12-21 | 上海东诚环保科技有限公司 | low temperature sludge drying system |
| CN207002549U (en) * | 2017-07-05 | 2018-02-13 | 义乌市晟蓝新能源科技有限公司 | Electromagnetic energy and heat-pump dehumidification dewatered sludge corollary equipment |
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| JP2011511703A (en) * | 2008-01-25 | 2011-04-14 | グアンチョウ プーデ エンバイロンメンタル プロテクション イクウィップメント，エルティーディー． | Sludge drying method |
| CN101774743A (en) * | 2010-01-26 | 2010-07-14 | 沈阳航空工业学院 | Latent heat recoverable multi-phase change sludge drying method and device |
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| CN112197540A (en) * | 2020-10-25 | 2021-01-08 | 贾雨凝 | New forms of energy drying device |
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| CN108409092B (en) | 2020-01-31 |
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