CN106746448A - A kind of continuous deep dehydration cooperating with low-temperature sludge drying method - Google Patents
A kind of continuous deep dehydration cooperating with low-temperature sludge drying method Download PDFInfo
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- CN106746448A CN106746448A CN201611117165.2A CN201611117165A CN106746448A CN 106746448 A CN106746448 A CN 106746448A CN 201611117165 A CN201611117165 A CN 201611117165A CN 106746448 A CN106746448 A CN 106746448A
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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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention provides a kind of continuous deep dehydration cooperating with low-temperature sludge drying system, include primary dewatering sludge storage storage, sludge modification mixer, sludge dewatering equipment, dewatered sludge buffering chamber, low temperature drying equipment, primary dewatering sludge storage storage, sludge modification mixer, sludge dewatering equipment, dewatered sludge buffering chamber are sequentially connected through conveyer, and low temperature drying equipment is located at the lower section of dewatered sludge buffering chamber.The present invention further provides a kind of method of continuous deep dehydration cooperating with low-temperature sludge drying.The method and its system of a kind of continuous deep dehydration cooperating with low-temperature sludge drying that the present invention is provided, can be widely applied for deep dehydration, the drying and other treatment of sewage treatment plant's primary dewatering sludge, primary dewatering moisture percentage in sewage sludge is set to be down to 10 ~ 45% from 75 ~ 85%, final minimizing, stabilisation, the recycling for realizing sludge, while the cost of investment and system operation cost of the equipment of reduction.
Description
Technical field
The invention belongs to specific resistance to filtration technical field, it is related to a kind of continuous deep dehydration cooperating with low-temperature sludge drying
Method and its system.
Background technology
With various regions sewage treatment plant of China a large amount of constructions and put into operation, wastewater treatment rate is greatly improved, and sludge yield is also
It is synchronous to increase.In terms of moisture content 80%, 30,000,000 tons are broken through by the end of the year 2012 whole nation year sludge total output.According to prediction,
60,000,000 tons of year will be broken through to the year two thousand twenty sludge quantity.Contained organic matter, heavy metal, cause in sewage is enriched in sewage plant sludge
The poisonous and harmful substances such as sick microorganism, with bigger bio-toxicity.On the other hand, " ten, the water " of in April, 2015 issue enters
One step regulation propulsion specific resistance to filtration：" sludge that sewage treatment facility is produced should be stabilized, at innoxious and resource
Reason disposal, the sludge for forbidding treatment disposal not up to standard enters arable land；Illegal sludge is stacked point and is banned without exception；At existing sludge
Reason disposal facility should be basically completed transformation up to standard before the end of the year 2017, and region and above municipal sludge harmless treatment disposal rate should
In reaching more than 90% before the year two thousand twenty bottom ".Due to the reduction of landfill yard, the raising of environmental consciousness, environmental standard it is increasingly strict
Etc. each side the reason for, the minimizing of sludge, harmless treatment disposal have turned into global problem.
At present, most domestic sewage treatment plant dehydrated sludge moisture content is 80% or so, and sludge volume is big, transport pole
Inconvenience, this brings extreme difficulties to the final disposal (including landfill, burning, building materials utilization, Land_use change etc.) of sludge.It is another
Aspect, China《Household refuse landfill sites Environmental capacity standard》(GB16889-2008) specify, municipal sewage sludge only exists
Moisture content drops to less than 60% after treatment, can just enter landfill yard.Therefore, deep dehydration treatment is carried out to primary dewatering sludge,
Realize that the minimizing of sludge, stabilisation, recycling are extremely urgent.
At present, mainly there are the press filtration of high pressure sheet frame van-type, solar energy desiccation, heat dry using wider deeply dehydrating sludge technology
Change etc..Moisture percentage in sewage sludge can be reduced to 60% by mechanical type sludge deep dehydration technology, but consider economy and by existence conditions
Restriction mechanical sludge dewatering be difficult to make moisture percentage in sewage sludge further reduce.In the occasion that moisture percentage in sewage sludge requirement is reduced, Chang Cai
Relatively low moisture percentage in sewage sludge with heat drying method to obtain.High pressure sheet frame van-type pressure filtering technique can be down to moisture percentage in sewage sludge
Less than 60%, but there is big occupation area of equipment, system complex in the technique, the squeezing time is more long, be unable to continuous discharge, place will
The shortcomings of asking (platform need to be set to raise) high, chlorination iron rot.
Chinese patent CN201210588958.8 provides a kind of sludge deep dehydrator and dewatering, by first by dirt
Mud is delivered to concentration basin and is pre-processed, and is then fed into being nursed one's health by nursing one's health medicament in conditioner, then be delivered to diaphragm filter press
In carry out filter-press dehydration.Moisture percentage in sewage sludge can be down to 60% by the method, but party's subtraction unit is complicated, relatively costly.
Chinese patent CN200920067632.4 is provided using the system of solar energy desiccation sludge, and it first passes through roof insulating
Solar energy is collected, heat is then transported in sludge drying rotary kiln by solar energy heating air channel for the desiccation for realizing sludge,
But the limited efficacy using solar energy is there is, energy consumption is larger, and disposal ability is limited, desiccation effect is unstable, by weather shadow
The problems such as sound is larger.
Chinese patent CN201520412562.7 provides a kind of sludge modification and is dehydrated one with steam heating type screw press
Makeup is put.The method heats sludge modification, steam, screw press is combined, and dehydrated sludge moisture content can be made to be down to 60%,
But the method heats mainly by steam, uses sludge dewatering is carried out in the way of heat changes water, relatively costly.
The content of the invention
The shortcoming of prior art, low it is an object of the invention to provide a kind of continuous deep dehydration collaboration in view of the above
The method and its system of warm sludge drying, make full use of the advantage of continuous deep dehydration and low temperature desiccation Combined Treatment to once taking off
Sewage sludge is dehydrated, desiccation, realizes the minimizing of sludge, innoxious, recycling.
In order to achieve the above objects and other related objects, a kind of continuous deep dehydration collaboration of first aspect present invention offer is low
Warm sludge drying system, includes primary dewatering sludge storage storage, sludge modification mixer, sludge dewatering equipment, dewatered sludge and delays
Storage, low temperature drying equipment, the primary dewatering sludge storage storage, sludge modification mixer, sludge dewatering equipment, dewatered sludge delay
Storage is sequentially connected through conveyer, and the low temperature drying equipment is located at the lower section of dewatered sludge buffering chamber.
Preferably, the conveyer is selected from any one in drag conveyor, ribbon conveyer, Shaftless screw conveyor
Or multiple combination.
It is highly preferred that the primary dewatering sludge storage storage, the conveyer between sludge modification mixer, sludge dewatering equipment
It is ribbon conveyer.
It is highly preferred that the conveyer between the sludge dewatering equipment, dewatered sludge buffering chamber is Shaftless screw conveyor.
Preferably, the bottom of the primary dewatering sludge storage storage is provided with dump gate valve.The primary dewatering sewage sludge storage
Primary dewatering sludge in primary dewatering sludge storage storage can be delivered to sludge modification by storehouse by dump gate valve through conveyer
Mixer.
Preferably, the sludge modification mixer is one kind of Patent No. ZL201320555506X for Treatment of Sludge
Mixed transport device.Described device by drive mechanism, charging aperture, dosing mouth, observation panel, discharging opening, agitating shaft, agitating paddle and
Cross section is constituted for the cylinder of W shapes；Agitating shaft stage casing in cylinder is provided with agitating paddle, and two ends are provided with the opposite preceding spiral shell in direction of rotation
Vane piece and rear screw blade, pitch are 5~20cm；Agitating paddle is made up of blade, blade shank, will be stirred by nut and pad
Mix oar to be fixedly connected with agitating shaft, blade is adjustable with the angle of agitating shaft.
Preferably, the sludge dewatering equipment is belt mud dewatering equipment.Specifically, the sludge dewatering equipment is the credit of Shanghai Shen
The TJSD type belt mud dewatering equipments of Ingegneria Ambientale SRL's production.The sludge dewatering equipment can carry out depth to sludge and take off
Water.
Preferably, the strainer of the sludge dewatering equipment is the strainer of the twill weave of polyester or nylon material.
Preferably, the bottom of the dewatered sludge buffering chamber is provided with dump gate valve.The dewatered sludge buffering chamber is by unloading
Mud gate valve can will be delivered to low temperature drying equipment in dewatered sludge buffering chamber by the sludge after the treatment of continuous deep dehydration.
Preferably, the low temperature drying equipment includes sludge at low temperature desiccation groove and air dry-set, and the sludge is low
Warm desiccation groove lower section is provided with inlet air plenum, and the inlet air plenum is provided with air outlet, and the sludge at low temperature desiccation groove top is provided with return air
Room, the return air chamber is provided with return air inlet, and the air dry-set is connected through air outlet with inlet air plenum, described to be air-dried
Device is connected through return air inlet with return air chamber.
It is highly preferred that the low temperature drying equipment is the circulation device for air of sealing, i.e., described sludge at low temperature desiccation groove, sky
Gas drying device, inlet air plenum, the air circulation system of return air chamber composition sealing.
It is highly preferred that the sludge after storage is processed through continuous deep dehydration in the sludge at low temperature desiccation groove.
It is highly preferred that the volume of the sludge at low temperature desiccation groove is 500-4000L.
It is highly preferred that the material of the sludge at low temperature desiccation groove is polyurethane composite heat-conservation board.
It is highly preferred that being provided with homogenating plate between the sludge at low temperature desiccation groove and inlet air plenum, the homogenating plate is provided with many
Individual air vent.
It is further preferred that the material of the homogenating plate is stainless steel.
It is further preferred that a diameter of 1-3mm of the air vent.
It is highly preferred that being provided with return air circulating fan in the return air chamber, the return air circulating fan is arranged on the return air
On mouth.
It is highly preferred that the sludge at low temperature desiccation groove is externally provided with multiple road wheels.It is further preferred that the road wheel is
4.
It is highly preferred that the bottom of the air dry-set is provided with multiple legs.It is further preferred that the leg is 4
It is individual.
It is highly preferred that the air dry-set includes air circulating umbilical, air set pipe, condenser, evaporator, enters
Wind circulating fan, heat exchanger, compressor, auxiliary condenser, reservoir, filter, expansion valve, gas-liquid separator；The air
Circulation pipe one end is connected with the air outlet, and the air circulating umbilical other end is connected with return air inlet, the air circulation
Air intake circulating fan, condenser, evaporator are sequentially provided with pipe, the air intake circulating fan is arranged on the air circulating umbilical
On air outlet one end, air circulating umbilical of the heat exchanger between the condenser, evaporator and the evaporator, return air inlet
Between air circulating umbilical on carry out heat exchange；The auxiliary condenser, condenser, reservoir, filter, expansion valve, evaporation
Device, gas-liquid separator, compressor circulate connection through air set pipe successively.
It is further preferred that the evaporator is circumscribed with condensate pipe, the condensed water pipe of evaporator and condensation water tank
It is connected.
Air circulating umbilical, air set pipe, condenser, evaporator, air intake circulating fan in above-mentioned air dry-set,
Heat exchanger, compressor, auxiliary condenser, reservoir, filter, expansion valve, gas-liquid separator are conventional use of component,
Commercially available acquisition.
Second aspect present invention provides a kind of method of continuous deep dehydration cooperating with low-temperature sludge drying, first to primary dewatering
After sludge carries out continuous deep dehydration treatment, then low temperature drying and other treatment is carried out, the continuous deep dehydration treatment includes that sludge changes
Property and press dewatering processing procedure.
Preferably, the primary dewatering sludge refers to that sewage treatment plant's moisture content after one-level is dehydrated is 80 ± 5%
Sludge.
Preferably, the continuous deep dehydration refers to that further dehydration to moisture content is 55-70% by primary dewatering sludge.
Preferably, the continuous deep dehydration treatment, specifically includes following steps：
1) sludge modification：Primary dewatering sludge is input into sludge modification mixer, adds composite modifier to be modified
Reaction；
2) press dewatering：By step 1) in carry out press dewatering in modified sludge input sludge dewatering equipment.
It is highly preferred that step 1) in, the composite modifier is the TJSMA of Shanghai Shen Yao Ingegneria Ambientale SRL production
Type composite modifier.The composite modifier can destroy primary dewatering sludge cell membrane, change mud granule structure, make sludge
Granulating, voidage increase, and are conducive to Distribution of sludge and the dehydration in follow-up press dewatering stage.
It is highly preferred that step 1) in, the quality that always adds of the composite modifier is the 1-6% of sludge quality.Further
Preferably, the quality that always adds of the composite modifier is the 2-5% of sludge quality.Most preferably, the composite modifier
Always add the 3-4% that quality is sludge quality.
It is highly preferred that step 1) in, the reaction time of the modified-reaction is 1~5min.It is further preferred that described change
Property reaction reaction time be 2~4min.
It is highly preferred that step 1) in, the power of the sludge modification mixer is 4-7.5kW.
It is highly preferred that step 1) in, the primary dewatering sludge input sludge modification mixer is by primary dewatering sludge
By primary dewatering sludge storage storage sludge modification mixer is input into through conveyer.It is further preferred that the conveyer is belt
Conveyer.
It is further preferred that the primary dewatering sludge is discharged by primary dewatering sludge storage storage through dump gate valve.
It is highly preferred that step 2) in, the condition of the press dewatering is：Strainer squeeze pressure：0.1~0.6Mpa；Squeezing
Dewatering time：1~7min.It is further preferred that the condition of the press dewatering is：Strainer squeeze pressure：0.2~0.5Mpa；
The press dewatering time：3~5min.Most preferably, the condition of the press dewatering is：Strainer squeeze pressure：0.35~0.4Mpa；
The press dewatering time：3~4min.The modified sewage sludge is by after press dewatering, moisture content is reduced to 55~70%, bulk density
Be 0.7-0.8, dehydrating effect significantly, through the basic odorless of the sludge of press dewatering, in solid-state, it is stable in properties, meet water and do not reduce, easily
Crush.
It is highly preferred that step 2) in, the modified sludge input sludge dewatering equipment is by dirt by modified sludge
The modified mixer of mud is input into sludge dewatering equipment through conveyer.It is further preferred that the conveyer is ribbon conveyer.
It is highly preferred that step 2) in, the sludge after the press dewatering is dirty through conveyer input dehydration by sludge dewatering equipment
Mud buffering chamber.It is further preferred that the conveyer is Shaftless screw conveyor.
It is further preferred that the sludge after the press dewatering is discharged by dewatered sludge buffering chamber through dump gate valve.
It is highly preferred that step 2) in, the sludge after the press dewatering forms 5~10mm concrete dynamic modulus flake.
Preferably, the low temperature drying and other treatment, the sludge after being processed through continuous deep dehydration is input into low temperature drying equipment
In, sludge is dried by hot-air.
It is highly preferred that the moisture content of sludge is 10-45% after the drying.It is further preferred that sludge after the drying
Moisture content be 10-30%.Most preferably, the moisture content of sludge is 10-25% after the drying.
It is highly preferred that sludge is transported to sludge accumulation area and is stacked after the drying.
It is highly preferred that the low temperature drying and other treatment, specifically includes following steps：
A the sludge after) being processed through continuous deep dehydration is input into sludge at low temperature desiccation groove by dewatered sludge buffering chamber；
It is further preferred that it is described through continuous deep dehydration process after sludge by dewatered sludge buffering chamber through dump gate valve
Input sludge at low temperature desiccation groove.
B hot-air) is dried by what air dry-set was produced after refrigeration treatment and dried process, by air outlet through entering
Air compartment
Flow through sludge at low temperature desiccation groove；
It is further preferred that the temperature for drying hot-air is 70-80 DEG C.
C the damp-heat air produced after hot-air is contacted with sludge) will be dried again, and sky is back flowed back into by return air inlet through return air chamber
Gas is done
In dry device, generation dries hot-air after carrying out refrigeration treatment and dried process；
It is further preferred that described, to dry the time that hot-air contacts with sludge be 1-3h.
It is further preferred that the temperature of the damp-heat air is 40-50 DEG C.The damp-heat air is the drying in inlet air plenum
Hot-air by after sludge at low temperature desiccation groove, the hot-air of moisture in entrainment water-containing sludge.
D) circulation carries out step B to C.
It is further preferred that the power of the air dry-set is 100-500KW.
It is further preferred that the refrigeration treatment, specifically includes following steps：
A1 the low temperature low pressure gas refrigerant that) will be reserved in air set pipe forms HTHP gas after being processed through compressor
Body；
A2) high temperature and high pressure gas were formed into cold air after auxiliary condenser, condenser treatment successively, and will be produced
Heat heats damp-heat air in condenser；
A3 low-pressure gas-liquid mixture is formed after) cold air is processed through reservoir, filter and expansion valve successively；
A4 low-pressure gas-liquid mixture) is re-formed into low temperature low pressure gas after evaporator, gas-liquid separator treatment successively
Refrigerant；
A5) circulation carries out step A1 to A4.
The refrigeration treatment is in air dry-set for damp-heat air removes moisture removal and be able to heat up to provide heat.
The low-pressure gas-liquid mixture discharges heat in evaporator, makes temperature reduction in evaporator.
Most preferably, the low temperature low pressure gas refrigerant is conventional gas refrigerant.Specific such as ammonia (R717), fluorine profit
High (fluorine alkyl chloride) (R22, R134a, R410A etc.).
Most preferably, high temperature and high pressure gas temperature >=90 DEG C, pressure >=0.15MPa.
Most preferably, temperature≤40 DEG C for crossing cold air.
Most preferably, the pressure holding≤0.06MPa of low-pressure gas-liquid mixture.The gas-liquid mixture was cold air warp
The liquid and its mixture of volatile matter formed after treatment.
Most preferably, the auxiliary condenser can be condensed using air-cooled or water-cooling pattern.
It is further preferred that the dried process, specifically includes following steps：
B1 damp-heat air) is flowed into air dry-set through air circulating umbilical, evaporation is entered after tentatively lowering the temperature through heat exchanger
Device；
B2 after) further lowering the temperature in evaporator, the condensed water that will be produced is discharged by condensate pipe, removes the sky of moisture removal
Gas enters condenser after tentatively being heated through heat exchanger again；
B3 after) further being heated in condenser, the hot-air that dries that will be produced is air-dried through air circulating umbilical outflow
Device；
B4) circulation carries out step B1 to B3.
The dried process is processed under the heat for providing effect damp-heat air in refrigeration by air dry-set, is carried out
Become dry air after dried process.
Most preferably, the condensed water is entered in condensation water tank by condensate pipe.
As described above, a kind of continuous deep dehydration cooperating with low-temperature sludge drying method that the present invention is provided, is by moisture content
In 75~85% primary dewatering sludge input sludge modification equipment, in the presence of composite sludge modifying agent, primary dewatering is dirty
The intracellular combination water of mud is converted into Free water, and primary dewatering sludge is able to " granulating ", " porosity increase ", it is modified once
Dewatered sludge enters continuous dewaterer, and moisture percentage in sewage sludge is reduced to 55~70% under dewaterer high pressure, the effect of intensive active force；So
Afterwards, the sludge after dehydration enters sludge at low temperature drying equipment, and under low temperature dry air effect, the moisture in sludge is by air band
Go out, moisture percentage in sewage sludge is further reduced to 10~45%.With advantages below：
(1) continuous deep dehydration system for sludge technical advantage with low cost is given full play to, by moisture content after primary dewatering
About 80% deeply dehydrating sludge to moisture content is 55~70%, economical and efficient；
(2) continuous deep dehydration system for sludge dehydrated sludge space is big, mud cake is thin, then by low temperature drying and other treatment, has
Beneficial to dry air heat transfer, moisture absorption, sludge heat drying effect is improved；
(3) 70-80 DEG C of sludge at low temperature drying technique running temperature, after desiccation moisture percentage in sewage sludge up to 10%-45%, fully
Play the excellent technical advantage of low temperature heat drying desiccation effect and processing cost is relatively low；
(4) present invention gives full play to the technical advantage of mechanical sludge dewatering and low temperature desiccation, economy, energy-conservation, efficient, can be real
The recycling of existing sludge, it is significant to solving specific resistance to filtration problem and problem of environmental pollution.
(5) present invention cooperates with dewatered sludge using continuous deep dehydration and low temperature desiccation, under same treatment effect, more singly
Pure cryogenic drying method, can save equipment investment cost 20%~30%, save direct operating cost 30%~40%.
(6) present invention by the way of desiccation step by step, is filled using continuous deep dehydration and low temperature desiccation collaboration dewatered sludge
The technical advantage of each technique is waved in distribution, and primary dewatering moisture percentage in sewage sludge can be made to be down to 10~45% from 75~85%, realizes sludge
Decrement 60~80%, is that the follow-up disposal of sludge creates advantage.
Brief description of the drawings
Fig. 1 is shown as the overall structure flow chart of continuous deep dehydration cooperating with low-temperature sludge drying system of the invention.
Fig. 2 is shown as the overall structure diagram of the low temperature drying and other treatment equipment in the present invention.
Fig. 3 is shown as the overall structure flow chart of the air dry-set in the present invention.
Reference：
A- primary dewatering sludge；B- primary dewatering sludge storage storage；C- conveyers；D- sludge modification mixers；E- is combined
Modifying agent；F- sludge dewatering equipments；G- dewatered sludge storage warehouses；H- low temperature drying equipments；H1- sludge at low temperature desiccation grooves；H2- air
Drying device；H3- inlet air plenums；H4- return air chambers；H5- air outlets；H6- return air inlets；I- condensation water tanks.
1- dump gate valves；2- dries hot-air；3- homogenating plates；4- dewatered sludges；5- damp-heat airs；6- return air circulated airs
Machine；7- air circulating umbilicals；8- condensate pipes；9- air intake circulating fans；10- road wheels；11- gas-liquid separators；12- compressors；
13- auxiliary condensers；14- condensers；15- heat exchangers；16- reservoirs；17- filters；18- expansion valves；19- evaporators；20-
Air vent；21- air set pipes.
Specific embodiment
The present invention is expanded on further with reference to specific embodiment, it should be appreciated that these embodiments are merely to illustrate the present invention
Rather than limit the scope of the invention.
Embodiments of the present invention are illustrated below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages of the invention and effect easily.The present invention can also be by specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
It should be clear that process equipment not specific dated in the following example or device using conventional equipment in the art or
Device；All pressure values and scope are all referring to relative pressure.
In addition, it is to be understood that one or more method and steps mentioned in the present invention do not repel before and after the combination step
Can also there is other method step or other method step can also be inserted between the step of these are specifically mentioned, unless separately
It is described；It should also be understood that the combination annexation between one or more the equipment/devices mentioned in the present invention is not repelled
Can also exist before and after the unit equipment/device other equipment/device or two equipment/devices specifically mentioning at these it
Between can also insert other equipment/device, unless otherwise indicated.And, unless otherwise indicated, the numbering of various method steps is only
Differentiate the convenient tool of various method steps, rather than to limit the ordering of various method steps or limiting enforceable model of the invention
Enclose, being altered or modified for its relativeness is of the invention enforceable when being also considered as in the case of without essence change technology contents
Category.
A kind of continuous deep dehydration cooperating with low-temperature sludge drying system used in following examples, as shown in figure 1, including
Primary dewatering sludge storage storage, sludge modification mixer, sludge dewatering equipment, dewatered sludge buffering chamber, low temperature drying equipment, it is described
Primary dewatering sludge storage storage, sludge modification mixer, sludge dewatering equipment, dewatered sludge buffering chamber are sequentially connected through conveyer,
The low temperature drying equipment is located at the lower section of dewatered sludge buffering chamber.
As shown in figure 1, the conveyer is selected from any in drag conveyor, ribbon conveyer, Shaftless screw conveyor
One or more combination.Wherein, the primary dewatering sludge storage storage, defeated between sludge modification mixer, sludge dewatering equipment
It is ribbon conveyer to send machine.Conveyer between the sludge dewatering equipment, dewatered sludge buffering chamber is Shaftless screw conveyor.
As shown in figure 1, the bottom of the primary dewatering sludge storage storage is provided with dump gate valve.The primary dewatering sludge storage
Primary dewatering sludge in primary dewatering sludge storage storage can be delivered to sludge and changed by storage by dump gate valve through conveyer
Property mixer.
As shown in figure 1, the sludge modification mixer is used at sludge for one kind of Patent No. ZL201320555506X
The mixed transport device of reason.The sludge dewatering equipment is belt mud dewatering equipment, specially the Shanghai Shen credit limited public affairs of environment-friendly engineering
Take charge of the TJSD type belt mud dewatering equipments of production.The strainer of the sludge dewatering equipment is the twill weave of polyester or nylon material
Strainer.
As shown in figure 1, the bottom of the dewatered sludge buffering chamber is provided with dump gate valve.The dewatered sludge buffering chamber passes through
The sludge after continuous deep dehydration is processed in dewatered sludge buffering chamber can be delivered to low temperature desiccation and set by dump gate valve
It is standby.
As shown in Fig. 2 the low temperature drying equipment includes sludge at low temperature desiccation groove and air dry-set, the sludge
Low temperature desiccation groove lower section is provided with inlet air plenum, and the inlet air plenum is provided with air outlet, and the sludge at low temperature desiccation groove top is provided with back
Air compartment, the return air chamber is provided with return air inlet, and the air dry-set is connected through air outlet with inlet air plenum, and the air is done
Dry device is connected through return air inlet with return air chamber.
As shown in Fig. 2 the sludge after storage is processed through continuous deep dehydration in the sludge at low temperature desiccation groove.The sludge
The volume of low temperature desiccation groove is 500-4000L.Homogenating plate, the equal wind are provided between the sludge at low temperature desiccation groove and inlet air plenum
Plate is provided with multiple air vents.A diameter of 1-3mm of the air vent.
As Figure 2-3, return air circulating fan is provided with the return air chamber, the return air circulating fan is arranged on described returning
On air port.As shown in Fig. 2 the return air chamber lower section is provided with multiple road wheels, preferably 4.The bottom of the air dry-set
Portion is provided with multiple legs, preferably 4.
As shown in figure 3, the air dry-set include air circulating umbilical, air set pipe, condenser, evaporator,
Air intake circulating fan, heat exchanger, compressor, auxiliary condenser, reservoir, filter, expansion valve, gas-liquid separator；The sky
Gas circulation pipe one end is connected with the air outlet, and the air circulating umbilical other end is connected with return air inlet, and the air is followed
Air intake circulating fan, condenser, evaporator are sequentially provided with endless tube, the air intake circulating fan is arranged on the air circulating umbilical
Air outlet one end on, air circulating umbilical of the heat exchanger between the condenser, evaporator and the evaporator, return air
Heat exchange is carried out on air circulating umbilical between mouthful；The auxiliary condenser, condenser, reservoir, filter, expansion valve, steaming
Hair device, gas-liquid separator, compressor circulate connection through air set pipe successively.
As shown in figure 3, the evaporator is circumscribed with condensate pipe, the condensed water pipe of evaporator is connected with condensation water tank
It is logical.
Embodiment 1
By sewage treatment plant by the primary dewatering sludge that the moisture content after filter press dehydration is 75-85%, such as Fig. 1 institutes
Show, sequentially passing through sludge modification mixer, deep sludge dehydrator through conveyer by primary dewatering sludge storage storage is carried out continuously
Deep dehydration treatment.The continuous deep dehydration treatment of primary dewatering sludge includes 2 processes：
(1) sludge modification：Primary dewatering sludge enters sludge modification mixer by primary dewatering sludge storage storage, is incorporated as
Sludge quality 1-6% is preferably the sludge composite modifier of Shanghai Shen Yao Ingegneria Ambientale SRL production of 2-5%, once takes off
Sewage sludge is preferably 2~4min, sludge modification with sludge composite modifier 1~5min of hybrid reaction in sludge modification mixer
Mixing acc power is 4-7.5kW.
(2) press dewatering：Modified sewage sludge is delivered to the belt type sludge dehydration of Shanghai Shen Yao Ingegneria Ambientale SRL production
Machine, filter cloth squeeze pressure is preferably 3 for 1~7min for 0.1~0.6Mpa is preferably 0.2~0.5Mpa, press dewatering time~
After being dehydrated under the conditions of 5min, moisture percentage in sewage sludge is 55~70%.
Sludge after press dewatering is input into dewatered sludge buffering chamber by sludge dewatering equipment through conveyer, then will be through continuous depth
Sludge after dewater treatment, the sludge at low temperature desiccation groove entered in low temperature drying equipment through dump gate valve by dewatered sludge buffering chamber
It is interior, low temperature drying and other treatment is carried out, sludge at low temperature desiccation groove volume is 0.5-4m3.As Figure 2-3, air dry-set is produced
Raw dries hot-air, and sludge at low temperature desiccation groove is flowed through through inlet air plenum by air outlet, and dry air passes through homogenating plate equably
Be scattered in sludge at low temperature desiccation groove, by contacted with the deep dehydration sludge in sludge at low temperature desiccation groove conducted heat, moisture absorption,
So that deep dehydration sludge drying, then the damp-heat air produced after hot-air is contacted with sludge will be dried, through return air chamber by return air
Mouth back flows back into air dry-set treatment generation and dries hot-air, and circulation is carried out.
Wherein, the power of air dry-set is 100-500KW.The temperature for drying hot-air is 70-80 DEG C.Dry heat empty
The time that gas is contacted with sludge is 1-3h.The temperature of damp-heat air is 40-50 DEG C.The moisture content of sludge is 10-45% after drying
Preferably 10-20%.Sludge is transported to sludge accumulation area and is stacked after drying.
Freeze treatment and dried process are synchronously carried out in air dry-set.
Refrigeration process is as follows：After the low temperature low pressure gas refrigerant that will be reserved in air set pipe is processed through compressor
Form HTHP air, then after auxiliary condenser, condenser treatment form supercooled air successively, and the heat for producing is existed
Heating damp-heat air in condenser, then the formation low-pressure gas-liquid mixture after the treatment of reservoir, filter and expansion valve successively, then
Ambient air is re-formed after evaporator, gas-liquid separator treatment successively, circulation is carried out.High temperature and high pressure gas temperature >=
90 DEG C, pressure >=0.15MPa.Cross temperature≤40 DEG C of cold air.Pressure holding≤the 0.06MPa of low-pressure gas-liquid mixture.
Dried process process is as follows：Damp-heat air is flowed into air dry-set through air circulating umbilical, it is preliminary through heat exchanger
Enter evaporator after cooling, after further lowering the temperature in evaporator, the condensed water that will be produced is discharged by condensate pipe, goes water removal
The air for dividing enters condenser after tentatively being heated through heat exchanger again, after further being heated in condenser, the dry heat that will be produced
Air flows out air dry-set through air circulating umbilical, and circulation is carried out.Condensed water is entered in condensation water tank by condensate pipe.
By above-mentioned treatment, in the case of same treatment effect to be reached, the continuous deep dehydration collaboration in the present invention
Low temperature sludge drying system, equipment investment and its operating cost are substantially reduced.
Embodiment 2
Jiangsu excess sludge of municipal sewage plant is by the primary dewatering moisture percentage in sewage sludge after belt filter press dehydration
It is 82%, primary dewatering sludge yield is 100t/d.As shown in figure 1, by primary dewatering sludge storage storage through the defeated conveyer of belt
Sequentially passing through sludge modification mixer, deep sludge dehydrator carries out continuous deep dehydration treatment.Primary dewatering sludge it is continuous
Deep dehydration treatment includes 2 processes：
(1) sludge modification：Primary dewatering sludge enters sludge modification mixer by primary dewatering sludge storage storage, is incorporated as
The sludge composite modifier of Shanghai Shen Yao Ingegneria Ambientale SRL production of sludge quality 1%, primary dewatering sludge and sludge
Composite modifier hybrid reaction 3.5min in sludge modification mixer, sludge modification mixing acc power is 5kW.
(2) press dewatering is delivered to the TJSD-2.0 type belts of Shanghai Shen Yao Ingegneria Ambientale SRL production by modified sewage sludge
Sludge dewatering equipment, filter cloth squeeze pressure be 0.35Mpa, the press dewatering time be 3min under the conditions of be dehydrated after, moisture percentage in sewage sludge is
70%, sludge quantity is about 63t/d after press dewatering.
Sludge after press dewatering is input into dewatered sludge buffering chamber by sludge dewatering equipment through Shaftless screw conveyor, then will be through
Sludge after continuous deep dehydration treatment is low through the sludge that dump gate valve is entered in low temperature drying equipment by dewatered sludge buffering chamber
In warm desiccation groove, low temperature drying and other treatment is carried out, sludge at low temperature desiccation groove volume is 4m3.As Figure 2-3, dress will be air-dried
That puts generation dries hot-air, and sludge at low temperature desiccation groove is flowed through through inlet air plenum by air outlet, and dry air is equal by homogenating plate
Be scattered in evenly in sludge at low temperature desiccation groove, by contacted with the deep dehydration sludge in sludge at low temperature desiccation groove conducted heat,
Moisture absorption so that deep dehydration sludge drying, then will dry after hot-air is contacted with sludge produce damp-heat air, through return air chamber by
Return air inlet back flows back into air dry-set treatment generation and dries hot-air, and circulation is carried out.
Wherein, the power of air dry-set is 400KW.The temperature for drying hot-air is 70 DEG C.Hot-air is dried with dirt
The time of mud contact is 2h.The temperature of damp-heat air is 40 DEG C.The moisture content of sludge is 30% after drying, and sludge quantity is after desiccation
27t/d.Sludge is transported to sludge accumulation area and is stacked after drying, for firing hollow brick.Continuous deep dehydration in the present invention
It is about 18,000,000 yuan with the equipment investment of low temperature desiccation coprocessing system, equipment direct operating cost is about 170 yuan/ton once
Dewatered sludge.Individually transport the low temperature sludge drying part taken in continuous deep dehydration cooperating with low-temperature sludge drying system of the invention
OK, it is compared with continuous deep dehydration cooperating with low-temperature sludge drying system of the invention, in same treatment effect to be reached
In the case of, the equipment investment saving about 20%, equipment of continuous deep dehydration cooperating with low-temperature sludge drying system of the invention is direct
Operating cost saves about 30%.
Freeze treatment and dried process are synchronously carried out in air dry-set.Refrigeration process is as follows：Air is cold
The low temperature low pressure gas refrigerant reserved in solidifying pipe forms HTHP air after being processed through compressor, then successively through aiding in condensing
Supercooled air is formed after device, condenser treatment, and the heat of generation is heated into damp-heat air in condenser, then successively through liquid storage
Device, filter and expansion valve treatment after formed low-pressure gas-liquid mixture, then successively through evaporator, gas-liquid separator treatment after again
Ambient air is formed, circulation is carried out.High temperature and high pressure gas temperature >=90 DEG C, pressure >=0.15MPa.Cross the temperature of cold air
≤40℃.Pressure holding≤the 0.06MPa of low-pressure gas-liquid mixture.Dried process process is as follows：Damp-heat air is followed through air
Endless tube flows into air dry-set, and evaporator is entered after tentatively lowering the temperature through heat exchanger, after further lowering the temperature in evaporator, will produce
Raw condensed water is discharged by condensate pipe, condenser is entered after going the air of moisture removal tentatively to be heated through heat exchanger again, cold
After further being heated in condenser, the hot-air that dries that will be produced flows out air dry-set through air circulating umbilical, and circulation is carried out.It is cold
Solidifying water is entered in condensation water tank by condensate pipe.
Embodiment 3
Shaanxi excess sludge of municipal sewage plant is by the primary dewatering moisture percentage in sewage sludge after plate and frame filter press dehydration
It is 80%, primary dewatering sludge yield is 50t/d.As shown in figure 1, by primary dewatering sludge storage storage through ribbon conveyer successively
Continuous deep dehydration treatment is carried out by sludge modification mixer, deep sludge dehydrator.The continuous depth of primary dewatering sludge
Dewater treatment includes 2 processes：
(1) sludge modification：Primary dewatering sludge enters sludge modification mixer by primary dewatering sludge storage storage, is incorporated as
The sludge composite modifier of Shanghai Shen Yao Ingegneria Ambientale SRL production of sludge quality 3%, primary dewatering sludge and sludge
Composite modifier hybrid reaction 3min in sludge modification mixer, sludge modification mixing acc power is 4kW.
(2) press dewatering：Modified sewage sludge is delivered to the TJSD-2.0 type bands of Shanghai Shen Yao Ingegneria Ambientale SRL production
Formula sludge dewatering equipment, filter cloth squeeze pressure be 0.4Mpa, the press dewatering time be 4min under the conditions of be dehydrated after, moisture percentage in sewage sludge is
65%, sludge quantity is about 33t/d after press dewatering.
Sludge after press dewatering is input into dewatered sludge buffering chamber by sludge dewatering equipment through Shaftless screw conveyor, then will be through
Sludge after continuous deep dehydration treatment is low through the sludge that dump gate valve is entered in low temperature drying equipment by dewatered sludge buffering chamber
In warm desiccation groove, low temperature drying and other treatment is carried out, sludge at low temperature desiccation groove volume is 2m3.As Figure 2-3, dress will be air-dried
That puts generation dries hot-air, and sludge at low temperature desiccation groove is flowed through through inlet air plenum by air outlet, and dry air is equal by homogenating plate
Be scattered in evenly in sludge at low temperature desiccation groove, by contacted with the deep dehydration sludge in sludge at low temperature desiccation groove conducted heat,
Moisture absorption so that deep dehydration sludge drying, then will dry after hot-air is contacted with sludge produce damp-heat air, through return air chamber by
Return air inlet back flows back into air dry-set treatment generation and dries hot-air, and circulation is carried out.
Wherein, the power of air dry-set is 170KW.The temperature for drying hot-air is 70 DEG C.Hot-air is dried with dirt
The time of mud contact is 1.8h.The temperature of damp-heat air is 45 DEG C.The moisture content of sludge is 25%, sludge quantity after desiccation after drying
It is 15t/d.Sludge is transported to sludge accumulation area and is stacked after drying, for making eco-cement.Continuous depth in the present invention
Dehydration and the equipment investment of low temperature desiccation coprocessing system are about 12,000,000 yuan, and equipment direct operating cost is about 120 yuan/ton
Primary dewatering sludge.Take the low temperature sludge drying part list in continuous deep dehydration cooperating with low-temperature sludge drying system of the invention
Solely operation, is compared with continuous deep dehydration cooperating with low-temperature sludge drying system of the invention, in same treatment to be reached effect
In the case of fruit, about 30%, equipment is saved in the equipment investment of continuous deep dehydration cooperating with low-temperature sludge drying system of the invention
Direct operating cost saves about 40%.
Freeze treatment and dried process are synchronously carried out in air dry-set.Refrigeration process is as follows：Air is cold
The low temperature low pressure gas refrigerant reserved in solidifying pipe forms HTHP air after being processed through compressor, then successively through aiding in condensing
Supercooled air is formed after device, condenser treatment, and the heat of generation is heated into damp-heat air in condenser, then successively through liquid storage
Device, filter and expansion valve treatment after formed low-pressure gas-liquid mixture, then successively through evaporator, gas-liquid separator treatment after again
Ambient air is formed, circulation is carried out.High temperature and high pressure gas temperature >=90 DEG C, pressure >=0.15MPa.Cross the temperature of cold air
≤40℃.Pressure holding≤the 0.06MPa of low-pressure gas-liquid mixture.Dried process process is as follows：Damp-heat air is followed through air
Endless tube flows into air dry-set, and evaporator is entered after tentatively lowering the temperature through heat exchanger, after further lowering the temperature in evaporator, will produce
Raw condensed water is discharged by condensate pipe, condenser is entered after going the air of moisture removal tentatively to be heated through heat exchanger again, cold
After further being heated in condenser, the hot-air that dries that will be produced flows out air dry-set through air circulating umbilical, and circulation is carried out.It is cold
Solidifying water is entered in condensation water tank by condensate pipe.
In sum, a kind of continuous deep dehydration collaboration sludge at low temperature drying method that the present invention is provided, complies with national section
Can environmental protection policy, using sludge step by step dewatering type be done step-by-step sludge minimizing, stabilize and resource.At the method
Sludge after reason can be used as landfill yard overburden soil, for making the construction materials such as hollow brick, eco-cement, realize the resource of sludge
Change and utilize, turn waste into wealth.The method makes full use of the technical advantage of mechanical sludge dewatering and heat drying dehydration, and economical and efficient can
It is widely used in the deep dehydration and recycling of Sewage Plant primary dewatering sludge, to propulsion China specific resistance to filtration industry
Development it is significant.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under without prejudice to spirit and scope of the invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
Into all equivalent modifications or change, should be covered by claim of the invention.
Claims (10)
1. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system, it is characterised in that include primary dewatering sewage sludge storage
Storehouse (B), sludge modification mixer (D), sludge dewatering equipment (F), dewatered sludge buffering chamber (G), low temperature drying equipment (H), it is described
Primary dewatering sludge storage storage (B), sludge modification mixer (D), sludge dewatering equipment (F), dewatered sludge buffering chamber (G) are through conveying
Machine (C) is sequentially connected, and the low temperature drying equipment (H) is located at the lower section of dewatered sludge buffering chamber (G).
2. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system according to claim 1, it is characterised in that described
Low temperature drying equipment (H) includes sludge at low temperature desiccation groove (H1) and air dry-set (H2), the sludge at low temperature desiccation groove
(H1) lower section is provided with inlet air plenum (H3), and the inlet air plenum (H3) is provided with air outlet (H5), the sludge at low temperature desiccation groove (H1)
Top is provided with return air chamber (H4), and the return air chamber (H4) is provided with return air inlet (H6), and the air dry-set (H2) is through air-out
Mouth (H5) is connected with inlet air plenum (H3), and the air dry-set (H2) is connected through return air inlet (H6) with return air chamber (H4).
3. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system according to claim 2, it is characterised in that described
Homogenating plate (3) is provided between sludge at low temperature desiccation groove (H1) and inlet air plenum (H3), the homogenating plate (3) is provided with multiple air vents
(20)；Return air circulating fan (6) is provided with the return air chamber (H4), the return air circulating fan (6) is arranged on the return air inlet
(H6) on.
4. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system according to claim 2, it is characterised in that described
Air dry-set (H2) includes air circulating umbilical (7), air set pipe (21), condenser (14), evaporator (19), air intake
Circulating fan (9), heat exchanger (15), compressor (12), auxiliary condenser (13), reservoir (16), filter (17), expansion valve
(18), gas-liquid separator (11)；Described air circulating umbilical (7) one end is connected with the air outlet (H5), the air circulation
Pipe (7) other end is connected with return air inlet (H6), and air intake circulating fan (9), condensation are sequentially provided with the air circulating umbilical (7)
Device (14), evaporator (19), the air intake circulating fan (9) are arranged on air outlet (H6) one end of the air circulating umbilical (7)
On, air circulating umbilical (7) and the evaporator of the heat exchanger (15) between the condenser (14), evaporator (19)
(19), heat exchange is carried out on the air circulating umbilical (7) between return air inlet (H6)；The auxiliary condenser (13), condenser (14),
Reservoir (16), filter (17), expansion valve (18), evaporator (19), gas-liquid separator (11), compressor (12) are cold through air
The circulation connection successively of solidifying pipe (21).
5. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system according to claim 4, it is characterised in that described
Evaporator (19) is circumscribed with condensate pipe (8), and the condensed water pipe of the evaporator (19) (8) is connected with condensation water tank (I).
6. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method, it is characterised in that first connect to primary dewatering sludge
After continuous deep dehydration treatment, then low temperature drying and other treatment is carried out, the continuous deep dehydration treatment includes that sludge modification and squeezing are de-
Water treatment procedure.
7. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method according to claim 6, it is characterised in that described
Continuous deep dehydration treatment, specifically includes following steps：
1) sludge modification：Primary dewatering sludge is input into sludge modification mixer, adds composite modifier to be modified reaction；
2) press dewatering：By step 1) in carry out press dewatering in modified sludge input sludge dewatering equipment.
8. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method according to claim 6, it is characterised in that described
Low temperature drying and other treatment, specifically includes following steps：
A the sludge after) being processed through continuous deep dehydration is input into sludge at low temperature desiccation groove by dewatered sludge buffering chamber；
B hot-air) is dried by what air dry-set was produced after refrigeration treatment and dried process, by air outlet through inlet air plenum
Flow through sludge at low temperature desiccation groove；
C the damp-heat air produced after hot-air is contacted with sludge) will be dried again, air is back flowed back into by return air inlet through return air chamber and is done
In dry device, generation dries hot-air after carrying out refrigeration treatment and dried process；
D) circulation carries out step B to C.
9. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method according to claim 8, it is characterised in that described
Refrigeration treatment, specifically includes following steps：
A1 the low temperature low pressure gas refrigerant that) will be reserved in air set pipe forms high temperature and high pressure gas after being processed through compressor；
A2 high temperature and high pressure gas) were formed into cold air, and the heat that will be produced after auxiliary condenser, condenser treatment successively
Damp-heat air is heated in condenser；
A3 low-pressure gas-liquid mixture is formed after) cold air is processed through reservoir, filter and expansion valve successively；
A4 low-pressure gas-liquid mixture) is re-formed into low temperature low pressure gas after evaporator, gas-liquid separator treatment successively to freeze
Agent；
A5) circulation carries out step A1 to A4.
10. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method according to claim 8, it is characterised in that institute
Dried process is stated, following steps are specifically included：
B1 damp-heat air) is flowed into air dry-set through air circulating umbilical, evaporator is entered after tentatively lowering the temperature through heat exchanger；
B2 after) further lowering the temperature in evaporator, the condensed water that will be produced is discharged by condensate pipe, removes the air of moisture removal again
Enter condenser after tentatively being heated through heat exchanger；
B3 after) further being heated in condenser, the hot-air that dries that will be produced flows out air dry-set through air circulating umbilical；
B4) circulation carries out step B1 to B3.
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