CN106746448B - 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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- CN106746448B CN106746448B CN201611117165.2A CN201611117165A CN106746448B CN 106746448 B CN106746448 B CN 106746448B CN 201611117165 A CN201611117165 A CN 201611117165A CN 106746448 B CN106746448 B CN 106746448B
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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)
- Thermal Sciences (AREA)
- 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, it include primary dewatering sludge storage storage, sludge modification mixing machine, sludge dewatering equipment, dewatered sludge buffering chamber, low temperature drying equipment, primary dewatering sludge storage storage, sludge modification mixing machine, 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 methods 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 provided by the invention, it 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%, the final minimizing for realizing sludge, stabilisation, resource utilization, while reducing the cost of investment and system operation cost of equipment.
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 technique
Largely building and putting into operation with China various regions sewage treatment plant, wastewater treatment rate greatly improves, and sludge yield is also
It is synchronous to increase.In terms of moisture content 80%, 30,000,000 tons have been broken through by the end of the year 2012 national 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.Organic matter, heavy metal contained in sewage, cause are enriched in sewage plant sludge
The poisonous and harmful substances such as sick microorganism have bigger bio-toxicity.On the other hand, in April, 2015 publication " ten, water " into
One step provides to promote specific resistance to filtration: " sludge that sewage treatment facility generates should be stabilized, at innoxious and recycling
Reason disposition forbids processing to dispose sludge not up to standard and enters arable land；Illegal sludge stacks 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 ground level and the above municipal sludge harmless treatment disposition rate are answered
Reach 90% or more 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. various aspects the reason of, the minimizing of sludge, harmless treatment disposition have become global problem.
Currently, most domestic sewage treatment plant dehydrated sludge moisture content is 80% or so, sludge volume is big, transports pole
Inconvenience, this brings extreme difficulties to the final disposal (including landfill, burning, building materials utilization, land use etc.) of sludge.It is another
Aspect, China " household refuse landfill sites contamination control standard " (GB16889-2008) regulation, municipal sewage sludge only exist
Moisture content drops to 60% hereinafter, can just enter landfill yard after processing.Therefore, deep dehydration processing is carried out to primary dewatering sludge,
The minimizing of realization sludge, stabilisation, resource utilization are extremely urgent.
Currently, mainly having the filters pressing 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 further decrease moisture percentage in sewage sludge.Reduced occasion, Chang Cai are required in moisture percentage in sewage sludge
Lower moisture percentage in sewage sludge with heat drying method to obtain.High pressure sheet frame van-type pressure filtering technique can be such that moisture percentage in sewage sludge is down to
60% hereinafter, but the technique there are occupation area of equipment big, system complex, the squeezing time is longer, be unable to continuous discharge, place is wanted
The disadvantages of asking high (platform need to be set to raise), chlorination iron rot.
Chinese patent CN201210588958.8 provides a kind of sludge deep dehydrator and dewatering, by first will be dirty
Mud is delivered to concentration basin and is pre-processed, and is then fed into conditioner through conditioning medicament conditioning, then be delivered to diaphragm filter press
Middle carry out filter-press dehydration.Moisture percentage in sewage sludge can be down to 60% by this method, but party's subtraction unit is complicated, higher cost.
Chinese patent CN200920067632.4 provides the system using solar energy desiccation sludge, first passes through roof insulating
Solar energy is collected, then heat is transported to the desiccation for realizing sludge in sludge drying rotary kiln by solar energy heating air duct,
But it there is the limited efficacy using solar energy, energy consumption is larger, and processing capacity is limited, and desiccation effect is unstable, by weather shadow
Ring the problems such as larger.
Chinese patent CN201520412562.7 provides a kind of sludge modification and steam heating type screw press dehydration one
Makeup is set.This method combines sludge modification, steam heating, screw press, and dehydrated sludge moisture content can be made to be down to 60%,
But this method mainly by steam heat, use by heat change water in a manner of carry out sludge dewatering, higher cost.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of continuous deep dehydration collaboration is low
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 primary de-
Sewage sludge is dehydrated, desiccation, realizes the minimizing of sludge, innoxious, resource utilization.
In order to achieve the above objects and other related objects, it is low to provide a kind of continuous deep dehydration collaboration for first aspect present invention
Warm sludge drying system includes that primary dewatering sludge storage storage, sludge modification mixing machine, sludge dewatering equipment, dewatered sludge are slow
Storage, low temperature drying equipment, the primary dewatering sludge storage storage, sludge modification mixing machine, sludge dewatering equipment, dewatered sludge are slow
Storage is sequentially connected through conveyer, and the low temperature drying equipment is located at the lower section of dewatered sludge buffering chamber.
Preferably, any one of the conveyer in drag conveyor, belt conveyor, Shaftless screw conveyor
Or multiple combinations.
It is highly preferred that the conveyer between the primary dewatering sludge storage storage, sludge modification mixing machine, sludge dewatering equipment
For belt conveyor.
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 equipped 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 through conveyer by dump gate valve by storehouse
Mixing machine.
Preferably, one kind that the sludge modification mixing machine is Patent No. ZL201320555506X is used for Treatment of Sludge
Mixed transport device.Described device by driving mechanism, feed inlet, dosing mouth, observation panel, discharge port, agitating shaft, agitating paddle and
Cross section is that W-shaped cylinder is constituted；The intracorporal agitating shaft middle section of cylinder is equipped with agitating paddle, and both ends are equipped with the opposite preceding spiral shell in direction of rotation
Vane piece and rear screw blade, screw pitch are 5~20cm；Agitating paddle is made of blade, blade shank, will be stirred by nut and gasket
It mixes paddle to be fixedly connected with agitating shaft, the angle of blade and agitating shaft is adjustable.
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 equipment of Ingegneria Ambientale SRL's production.It is de- that the sludge dewatering equipment can carry out depth to sludge
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 equipped with dump gate valve.The dewatered sludge buffering chamber is by unloading
Mud gate valve can be by by continuous deep dehydration, treated that sludge is delivered to low temperature drying equipment in dewatered sludge buffering chamber.
Preferably, the low temperature drying equipment includes sludge at low temperature desiccation slot and air dry-set, and the sludge is low
Inlet air plenum is equipped with below warm desiccation slot, the inlet air plenum is equipped with air outlet, is equipped with return air above the sludge at low temperature desiccation slot
Room, the return air chamber are equipped 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., the described sludge at low temperature desiccation slot, sky
Gas drying device, inlet air plenum, the air circulation system of return air chamber composition sealing.
It is highly preferred that storage is through continuous deep dehydration treated sludge in the sludge at low temperature desiccation slot.
It is highly preferred that the volume of the sludge at low temperature desiccation slot is 500-4000L.
It is highly preferred that the material of the sludge at low temperature desiccation slot is polyurethane composite heat-conservation board.
It is highly preferred that being equipped with homogenating plate between the sludge at low temperature desiccation slot and inlet air plenum, the homogenating plate is equipped with more
A ventilation hole.
It is further preferred that the material of the homogenating plate is stainless steel.
It is further preferred that the diameter of the ventilation hole is 1-3mm.
It is highly preferred that being equipped with return air circulating fan in the return air chamber, the return air circulating fan is arranged in the return air
On mouth.
It is highly preferred that the sludge at low temperature desiccation slot is externally provided with multiple traveling wheels.It is further preferred that the traveling wheel is
4.
It is highly preferred that the bottom of the air dry-set is equipped with multiple stabilizer blades.It is further preferred that the stabilizer blade is 4
It is a.
It is highly preferred that the air dry-set include air circulating umbilical, air set pipe, condenser, evaporator, into
Wind circulating fan, heat exchanger, compressor, auxiliary condenser, liquid storage device, 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 inlet circulating fan, condenser, evaporator are successively arranged on pipe, the air circulating umbilical is arranged in the air inlet circulating fan
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, liquid storage device, filter, expansion valve, evaporation
Device, gas-liquid separator, compressor circuit sequentially connection through air set pipe.
It is further preferred that the evaporator is circumscribed with condensate pipe, the evaporator is through condensate pipe and condensation water tank
It is connected.
Air circulating umbilical, air set pipe, condenser, evaporator in above-mentioned air dry-set, air inlet circulating fan,
Heat exchanger, compressor, auxiliary condenser, liquid storage device, filter, expansion valve, gas-liquid separator are conventional use of component,
Commercially available acquisition.
Second aspect of the 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 processing, then low temperature drying and other treatment is carried out, the continuous deep dehydration processing changes including sludge
Property and press dewatering treatment process.
Preferably, the primary dewatering sludge refers to that sewage treatment plant's moisture content after level-one is dehydrated is 80 ± 5%
Sludge.
Preferably, the continuous deep dehydration refers to that it is 55-70% that primary dewatering sludge, which is further dehydrated to moisture content,.
Preferably, the continuous deep dehydration processing, specifically includes the following steps:
1) sludge modification: primary dewatering sludge is inputted in sludge modification mixing machine, and composite modifier is added and is modified
Reaction；
2) press dewatering: sludge modified in step 1) is inputted in sludge dewatering equipment and carries out press dewatering.
It is highly preferred that the composite modifier is the TJSMA of Shanghai Shen Yao Ingegneria Ambientale SRL production in step 1)
Type composite modifier.The composite modifier can destroy primary dewatering sludge cell wall, change mud granule structure, make sludge
Granulating, voidage increase, and are conducive to Distribution of sludge and the dehydration in subsequent press dewatering stage.
It is highly preferred that the composite modifier always adds the 1-6% that quality is sludge quality in step 1).Further
Preferably, the composite modifier always add quality be sludge quality 2-5%.Most preferably, the composite modifier
Always add the 3-4% that quality is sludge quality.
It is highly preferred that the reaction time of the modified-reaction is 1~5min in step 1).It is further preferred that described change
Property reaction reaction time be 2~4min.
It is highly preferred that the power of the sludge modification mixing machine is 4-7.5kW in step 1).
It is highly preferred that the primary dewatering sludge input sludge modification mixing machine is by primary dewatering sludge in step 1)
Sludge modification mixing machine is inputted through conveyer by primary dewatering sludge storage storage.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 in step 2), the condition of the press dewatering are as follows: strainer squeeze pressure: 0.1~0.6Mpa；Squeezing
Dewatering time: 1~7min.It is further preferred that the condition of the press dewatering are as follows: strainer squeeze pressure: 0.2~0.5Mpa；
The press dewatering time: 3~5min.Most preferably, the condition of the press dewatering are as follows: strainer squeeze pressure: 0.35~0.4Mpa；
The press dewatering time: 3~4min.The modified sewage sludge is after press dewatering, and moisture content is reduced to 55~70%, bulk density
For 0.7-0.8, dehydrating effect is significant, and the sludge through press dewatering is substantially odorless, does not restore, easily in solid-state, property stabilization, chance water
It crushes.
It is highly preferred that the modified sludge input sludge dewatering equipment is by modified sludge by dirt in step 2)
The modified mixing machine of mud inputs sludge dewatering equipment through conveyer.It is further preferred that the conveyer is belt conveyor.
It is highly preferred that the sludge after the press dewatering inputs dehydration dirt through conveyer by sludge dewatering equipment in step 2)
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 the sludge after the press dewatering forms the porous flake of 5~10mm in step 2).
Preferably, the low temperature drying and other treatment will input low temperature drying equipment through continuous deep dehydration treated sludge
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 the following steps:
A) sludge at low temperature desiccation slot will be inputted by dewatered sludge buffering chamber through continuous deep dehydration treated sludge；
It is further preferred that it is described through continuous deep dehydration treated sludge by dewatered sludge buffering chamber through dump gate valve
Input sludge at low temperature desiccation slot.
B) by air dry-set after refrigeration is handled and is dried the drying hot-air that generates, by air outlet pass through into
Air compartment
Flow through sludge at low temperature desiccation slot；
It is further preferred that the temperature of the dry hot-air is 70-80 DEG C.
C the damp-heat air generated after) again contacting dry hot-air with sludge, back flows back into sky by return air inlet through return air chamber
Gas is dry
In dry device, carries out refrigeration processing and generate dry hot-air after being dried；
It is further preferred that the time that the dry hot-air is contacted with sludge is 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 indoor drying of air inlet
After hot-air passes through sludge at low temperature desiccation slot, the hot-air of moisture in water-containing sludge is carried secretly.
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 processing, specifically includes the following steps:
A1 the low temperature low pressure gas refrigerant reserved in air set pipe) is formed into high temperature and pressure gas after compressor is handled
Body；
A2 high temperature and high pressure gas successively) was formed into cold air after auxiliary condenser, condenser processing, and by generation
Heat heats damp-heat air in condenser；
A3 cold air successively) is formed into low-pressure gas-liquid mixture after the processing of liquid storage device, filter and expansion valve；
A4 low-pressure gas-liquid mixture successively) is re-formed into low temperature low pressure gas after evaporator, gas-liquid separator processing
Refrigerant；
A5) circulation carries out step A1 to A4.
The refrigeration processing removes moisture removal and is able to heat up to provide heat in air dry-set for damp-heat air.
The low-pressure gas-liquid mixture discharges heat in evaporator, reduces temperature in evaporator.
Most preferably, the low temperature low pressure gas refrigerant is common gas refrigerant.Specific such as ammonia (R717), fluorine benefit
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, pressure holding≤0.06MPa of low-pressure gas-liquid mixture.The gas-liquid mixture was cold air warp
The mixture of the liquid and its volatile matter that are formed after processing.
Most preferably, the auxiliary condenser can be used air-cooled or water-cooling pattern and be condensed.
It is further preferred that the drying process, specifically includes the following steps:
B1 damp-heat air) is flowed into air dry-set through air circulating umbilical, evaporation is entered after heat exchanger tentatively cools down
Device；
B2 after) further cooling down in evaporator, the condensed water of generation is discharged by condensate pipe, removes the sky of moisture removal
Gas enters condenser after heat exchanger tentatively heats again；
B3 after) further being heated in condenser, the drying hot-air of generation is air-dried through air circulating umbilical outflow
Device；
B4) circulation carries out step B1 to B3.
It is described to be dried damp-heat air through air dry-set under the heat effect that refrigeration processing provides, it carries out
Become dry air after drying process.
Most preferably, the condensed water is discharged into condensation water tank by condensate pipe.
As described above, a kind of continuous deep dehydration cooperating with low-temperature sludge drying method provided by the invention, is by moisture content
In 75~85% primary dewatering sludge input sludge modification equipment, under the action of composite sludge modifying agent, primary dewatering is dirty
The combination water intracellular of mud is converted into Free water, and primary dewatering sludge is able to " to granulate ", " porosity increase ", modified primary
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, dewatered sludge enters sludge at low temperature drying equipment, and under low temperature dry air effect, the moisture in sludge is by air band
Out, moisture percentage in sewage sludge is further reduced to 10~45%.It has the advantage that
(1) the low-cost technical advantage of continuous deep dehydration system for sludge 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 gap is big, mud cake is thin, then by low temperature drying and other treatment, has
Conducive 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, moisture percentage in sewage sludge is up to 10%-45% after desiccation, sufficiently
It plays 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 Yu low temperature desiccation, economical, energy saving, efficient, can be real
The resource utilization of existing sludge, is of great significance to solution 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 is filled by the way of desiccation step by step 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% creates advantage for the subsequent disposition of sludge.
Detailed description of the invention
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.
Appended drawing reference:
A- primary dewatering sludge；B- primary dewatering sludge storage storage；C- conveyer；D- sludge modification mixing machine；E- is compound
Modifying agent；F- sludge dewatering equipment；G- dewatered sludge storage warehouse；H- low temperature drying equipment；H1- sludge at low temperature desiccation slot；H2- air
Drying device；H3- inlet air plenum；H4- return air chamber；H5- air outlet；H6- return air inlet；I- condensation water tank.
1- dump gate valve；2- dries hot-air；3- homogenating plate；4- dewatered sludge；5- damp-heat air；6- return air circulated air
Machine；7- air circulating umbilical；8- condensate pipe；9- enters the wind circulating fan；10- traveling wheel；11- gas-liquid separator；12- compressor；
13- auxiliary condenser；14- condenser；15- heat exchanger；16- liquid storage device；17- filter；18- expansion valve；19- evaporator；20-
Ventilation hole；21- air set pipe.
Specific embodiment
The present invention is further explained combined with specific embodiments below, it should be appreciated that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
It should be clear that in the following example not specifically dated process equipment or device be all made of conventional equipment in the art or
Device；All pressure values and range all refer to relative pressure.
In addition, it should also be understood that, one or more method and step mentioned in the present invention does not repel before and after the combination step
It can also be inserted into other methods step there may also be other methods step or between these explicitly mentioned steps, unless separately
It is described；It should also be understood that the combination connection relationship between one or more equipment/device mentioned in the present invention is not repelled
The two equipment/devices specifically mentioned before and after the unit equipment/device there may also be other equipment/device or at these it
Between can also be inserted into other equipment/device, unless otherwise indicated.Moreover, unless otherwise indicated, the number of various method steps is only
Identify the convenient tool of various method steps, rather than for the arrangement order of limitation various method steps or limits the enforceable model of the present invention
It encloses, relativeness is altered or modified, and without material changes in technical content, when being also considered as, the present invention is enforceable
Scope.
A kind of continuous deep dehydration cooperating with low-temperature sludge drying system used in the following embodiment, as shown in Figure 1, including
Primary dewatering sludge storage storage, sludge modification mixing machine, sludge dewatering equipment, dewatered sludge buffering chamber, low temperature drying equipment, it is described
Primary dewatering sludge storage storage, sludge modification mixing machine, 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 any in drag conveyor, belt conveyor, Shaftless screw conveyor
One or more combinations.Wherein, the primary dewatering sludge storage storage, sludge modification mixing machine, defeated between sludge dewatering equipment
Sending machine is belt conveyor.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 equipped with dump gate valve.The primary dewatering sludge storage
Primary dewatering sludge in primary dewatering sludge storage storage can be delivered to sludge through conveyer by dump gate valve and changed by storage
Property mixing machine.
As shown in Figure 1, one kind that the sludge modification mixing machine is Patent No. ZL201320555506X is at sludge
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 equipment 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 equipped with dump gate valve.The dewatered sludge buffering chamber passes through
Dump gate valve can be by by continuous deep dehydration, treated that sludge is delivered to low temperature desiccation sets in dewatered sludge buffering chamber
It is standby.
As shown in Fig. 2, the low temperature drying equipment includes sludge at low temperature desiccation slot and air dry-set, the sludge
Inlet air plenum is equipped with below low temperature desiccation slot, the inlet air plenum is equipped with air outlet, is equipped with back above the sludge at low temperature desiccation slot
Air compartment, the return air chamber are equipped with return air inlet, and the air dry-set is connected through air outlet with inlet air plenum, and the air is dry
Dry device is connected through return air inlet with return air chamber.
As shown in Fig. 2, storage is through continuous deep dehydration treated sludge in the sludge at low temperature desiccation slot.The sludge
The volume of low temperature desiccation slot is 500-4000L.Homogenating plate, the equal wind are equipped between the sludge at low temperature desiccation slot and inlet air plenum
Plate is equipped with multiple ventilation holes.The diameter of the ventilation hole is 1-3mm.
As Figure 2-3, return air circulating fan is equipped in the return air chamber, the return air circulating fan is arranged at described time
On air port.As shown in Fig. 2, multiple traveling wheels are equipped with below the return air chamber, preferably 4.The bottom of the air dry-set
Portion be equipped with multiple stabilizer blades, preferably 4.
As shown in figure 3, the air dry-set include air circulating umbilical, air set pipe, condenser, evaporator,
Enter the wind circulating fan, heat exchanger, compressor, auxiliary condenser, liquid storage device, 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 follows
Air inlet circulating fan, condenser, evaporator are successively arranged on endless tube, the air inlet circulating fan is arranged in 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, liquid storage device, filter, expansion valve, steaming
Hair device, gas-liquid separator, compressor circuit sequentially connection through air set pipe.
As shown in figure 3, the evaporator is circumscribed with condensate pipe, the evaporator is connected through condensate pipe with condensation water tank
It is logical.
Embodiment 1
The primary dewatering sludge for being 75-85% by the dewatered moisture content of filter press by sewage treatment plant, such as Fig. 1 institute
Show, successively passes through sludge modification mixing machine through conveyer by primary dewatering sludge storage storage, deep sludge dehydrator carries out continuously
Deep dehydration processing.The continuous deep dehydration processing of primary dewatering sludge includes 2 processes:
(1) sludge modification: primary dewatering sludge enters sludge modification mixing machine 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%, primary de-
Sewage sludge and sludge composite modifier 1~5min of hybrid reaction in sludge modification mixing machine are preferably 2~4min, sludge modification
Mixing machine power is 4-7.5kW.
(2) press dewatering: the belt type sludge produced to Shanghai Shen Yao Ingegneria Ambientale SRL is sent to be dehydrated modified sewage sludge
Machine, filter cloth squeeze pressure be 0.1~0.6Mpa be preferably 0.2~0.5Mpa, press dewatering time be 1~7min be preferably 3~
After being dehydrated under the conditions of 5min, moisture percentage in sewage sludge is 55~70%.
Sludge after press dewatering inputs dewatered sludge buffering chamber through conveyer by sludge dewatering equipment, then will be through continuous depth
Sludge after dehydration, the sludge at low temperature desiccation slot being discharged by dewatered sludge buffering chamber through dump gate valve in low temperature drying equipment
It is interior, low temperature drying and other treatment is carried out, sludge at low temperature desiccation slot volume is 0.5-4m3.As Figure 2-3, air dry-set is produced
Raw drying hot-air flows through sludge at low temperature desiccation slot through inlet air plenum by air outlet, and dry air passes through homogenating plate equably
Be scattered in sludge at low temperature desiccation slot, by contacted with the deep dehydration sludge in sludge at low temperature desiccation slot conducted heat, moisture absorption,
So that deep dehydration sludge drying, then the damp-heat air generated after dry hot-air is contacted with sludge, through return air chamber by return air
Mouth back flows back into air dry-set processing and generates dry hot-air, and circulation carries out.
Wherein, the power of air dry-set is 100-500KW.The temperature of dry hot-air is 70-80 DEG C.Dry heat is 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.
It is synchronized in air dry-set and carries out refrigeration processing and drying process.
Refrigeration process is as follows: by the low temperature low pressure gas refrigerant reserved in air set pipe after compressor is handled
High temperature and pressure air is formed, then successively forms supercooled air after auxiliary condenser, condenser processing, and the heat of generation is existed
Damp-heat air is heated in condenser, then successively forms low-pressure gas-liquid mixture after the processing of liquid storage device, filter and expansion valve, then
Ambient air successively is re-formed after evaporator, gas-liquid separator processing, circulation carries out.High temperature and high pressure gas temperature >=
90 DEG C, pressure >=0.15MPa.Cross temperature≤40 DEG C of cold air.Pressure holding≤0.06MPa of low-pressure gas-liquid mixture.
Drying 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 cooling down in evaporator, the condensed water of generation is discharged by condensate pipe, goes to remove water
The air divided enters condenser after heat exchanger tentatively heats again, after further heating in condenser, by the dry heat of generation
Air flows out air dry-set through air circulating umbilical, and circulation carries out.Condensed water is discharged into condensation water tank by condensate pipe.
Continuous deep dehydration collaboration by above-mentioned processing, in the case where same treatment effect to be reached, in the present invention
Low temperature sludge drying system, equipment investment and its operating cost substantially reduce.
Embodiment 2
The dewatered primary dewatering moisture percentage in sewage sludge of belt filter press is passed through in Jiangsu excess sludge of municipal sewage plant
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
Successively continuous deep dehydration processing is carried out by sludge modification mixing machine, deep sludge dehydrator.Primary dewatering sludge it is continuous
Deep dehydration processing includes 2 processes:
(1) sludge modification: primary dewatering sludge enters sludge modification mixing machine 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 mixing machine, sludge modification mixing machine power are 5kW.
(2) modified sewage sludge is sent the TJSD-2.0 type belt produced to Shanghai Shen Yao Ingegneria Ambientale SRL by press dewatering
Sludge dewatering equipment, after being dehydrated under the conditions of filter cloth squeeze pressure is 0.35Mpa, the press dewatering time is 3min, moisture percentage in sewage sludge is
70%, sludge quantity is about 63t/d after press dewatering.
Sludge after press dewatering inputs dewatered sludge buffering chamber through Shaftless screw conveyor by sludge dewatering equipment, then will be through
Continuous deep dehydration treated sludge, the sludge being discharged into low temperature drying equipment by dewatered sludge buffering chamber through dump gate valve are low
In warm desiccation slot, low temperature drying and other treatment is carried out, sludge at low temperature desiccation slot volume is 4m3.As Figure 2-3, dress will be air-dried
The drying hot-air for setting generation flows through sludge at low temperature desiccation slot through inlet air plenum by air outlet, and dry air is equal by homogenating plate
Be scattered in sludge at low temperature desiccation slot evenly, by contacted with the deep dehydration sludge in sludge at low temperature desiccation slot conducted heat,
Moisture absorption so that deep dehydration sludge drying, then will dry hot-air contacted with sludge after the damp-heat air that generates, through return air chamber by
Return air inlet back flows back into air dry-set processing and generates dry hot-air, and circulation carries out.
Wherein, the power of air dry-set is 400KW.The temperature of dry hot-air is 70 DEG C.Dry hot-air and 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
Equipment investment with low temperature desiccation coprocessing system is about 18,000,000 yuan, and equipment direct operating cost is about 170 yuan/ton primary
Dewatered sludge.The low temperature sludge drying part in continuous deep dehydration cooperating with low-temperature sludge drying system of the invention is taken individually to transport
Row, is compared, in same treatment effect to be reached with continuous deep dehydration cooperating with low-temperature sludge drying system of the invention
In the case of, it is direct that about 20%, equipment is saved in the equipment investment of continuous deep dehydration cooperating with low-temperature sludge drying system of the invention
Operating cost saves about 30%.
It is synchronized in air dry-set and carries out refrigeration processing and drying process.Refrigeration process is as follows: air is cold
The low temperature low pressure gas refrigerant reserved in solidifying pipe forms high temperature and pressure air after compressor is handled, then successively condenses through auxiliary
Supercooled air is formed after device, condenser processing, and the heat of generation is heated into damp-heat air in condenser, then successively through liquid storage
Device, filter and expansion valve processing after formed low-pressure gas-liquid mixture, then successively through evaporator, gas-liquid separator processing after again
Ambient air is formed, circulation carries out.High temperature and high pressure gas temperature >=90 DEG C, pressure >=0.15MPa.Cross the temperature of cold air
≤40℃.Pressure holding≤0.06MPa of low-pressure gas-liquid mixture.Drying process process is as follows: damp-heat air is followed through air
Endless tube flows into air dry-set, and evaporator is entered after heat exchanger tentatively cools down, and after further cooling down in evaporator, will produce
Raw condensed water is discharged by condensate pipe, goes the air of moisture removal to enter condenser after heat exchanger tentatively heats again, cold
After further heating in condenser, the drying hot-air of generation is flowed out into air dry-set through air circulating umbilical, circulation carries out.It is cold
Condensate is discharged into condensation water tank by condensate pipe.
Embodiment 3
The dewatered primary dewatering moisture percentage in sewage sludge of plate and frame filter press is passed through in Shaanxi excess sludge of municipal sewage plant
It is 80%, primary dewatering sludge yield is 50t/d.As shown in Figure 1, by primary dewatering sludge storage storage through belt conveyor successively
Continuous deep dehydration processing is carried out by sludge modification mixing machine, deep sludge dehydrator.The continuous depth of primary dewatering sludge
Dehydration includes 2 processes:
(1) sludge modification: primary dewatering sludge enters sludge modification mixing machine 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 mixing machine, sludge modification mixing machine power are 4kW.
(2) modified sewage sludge press dewatering: is sent to the TJSD-2.0 type band produced to Shanghai Shen Yao Ingegneria Ambientale SRL
Formula sludge dewatering equipment, after being dehydrated under the conditions of filter cloth squeeze pressure is 0.4Mpa, the press dewatering time is 4min, moisture percentage in sewage sludge is
65%, sludge quantity is about 33t/d after press dewatering.
Sludge after press dewatering inputs dewatered sludge buffering chamber through Shaftless screw conveyor by sludge dewatering equipment, then will be through
Continuous deep dehydration treated sludge, the sludge being discharged into low temperature drying equipment by dewatered sludge buffering chamber through dump gate valve are low
In warm desiccation slot, low temperature drying and other treatment is carried out, sludge at low temperature desiccation slot volume is 2m3.As Figure 2-3, dress will be air-dried
The drying hot-air for setting generation flows through sludge at low temperature desiccation slot through inlet air plenum by air outlet, and dry air is equal by homogenating plate
Be scattered in sludge at low temperature desiccation slot evenly, by contacted with the deep dehydration sludge in sludge at low temperature desiccation slot conducted heat,
Moisture absorption so that deep dehydration sludge drying, then will dry hot-air contacted with sludge after the damp-heat air that generates, through return air chamber by
Return air inlet back flows back into air dry-set processing and generates dry hot-air, and circulation carries out.
Wherein, the power of air dry-set is 170KW.The temperature of dry hot-air is 70 DEG C.Dry hot-air and 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% after drying, sludge quantity after desiccation
For 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 in continuous deep dehydration cooperating with low-temperature sludge drying system of the invention single
Solely operation, is compared with continuous deep dehydration cooperating with low-temperature sludge drying system of the invention, imitates in same treatment to be reached
In the case where fruit, about 30%, equipment are 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%.
It is synchronized in air dry-set and carries out refrigeration processing and drying process.Refrigeration process is as follows: air is cold
The low temperature low pressure gas refrigerant reserved in solidifying pipe forms high temperature and pressure air after compressor is handled, then successively condenses through auxiliary
Supercooled air is formed after device, condenser processing, and the heat of generation is heated into damp-heat air in condenser, then successively through liquid storage
Device, filter and expansion valve processing after formed low-pressure gas-liquid mixture, then successively through evaporator, gas-liquid separator processing after again
Ambient air is formed, circulation carries out.High temperature and high pressure gas temperature >=90 DEG C, pressure >=0.15MPa.Cross the temperature of cold air
≤40℃.Pressure holding≤0.06MPa of low-pressure gas-liquid mixture.Drying process process is as follows: damp-heat air is followed through air
Endless tube flows into air dry-set, and evaporator is entered after heat exchanger tentatively cools down, and after further cooling down in evaporator, will produce
Raw condensed water is discharged by condensate pipe, goes the air of moisture removal to enter condenser after heat exchanger tentatively heats again, cold
After further heating in condenser, the drying hot-air of generation is flowed out into air dry-set through air circulating umbilical, circulation carries out.It is cold
Condensate is discharged into condensation water tank by condensate pipe.
In conclusion a kind of continuous deep dehydration provided by the invention cooperates with sludge at low temperature drying method, national section is complied with
Can environmental protection policy, using sludge, minimizing, stabilisation and the recycling of sludge is done step-by-step in dewatering type step by step.At this 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 utilizes, turns waste into wealth.The technical advantage that this method makes full use of mechanical sludge dewatering and heat drying to be dehydrated, economical and efficient can
It is widely used in the deep dehydration and resource utilization of sewage plant primary dewatering sludge, to propulsion China's specific resistance to filtration industry
Development be of great significance.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (6)
1. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system, which is characterized in that include primary dewatering sewage sludge storage
Storehouse (B), sludge modification mixing machine (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 mixing machine (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)；
The low temperature drying equipment (H) includes sludge at low temperature desiccation slot (H1) and air dry-set (H2), and the sludge is low
It is equipped with inlet air plenum (H3) below warm desiccation slot (H1), the inlet air plenum (H3) is equipped with air outlet (H5), and the sludge at low temperature is dry
Change and be equipped with return air chamber (H4) above slot (H1), the return air chamber (H4) is equipped with return air inlet (H6), the air dry-set
(H2) it is connected through air outlet (H5) with inlet air plenum (H3), the air dry-set (H2) is through return air inlet (H6) and return air chamber
(H4) it is connected；
The air dry-set (H2) includes air circulating umbilical (7), air set pipe (21), condenser (14), evaporator
(19), circulating fan (9), heat exchanger (15), compressor (12), auxiliary condenser (13), liquid storage device (16), filter are entered the wind
(17), expansion valve (18), gas-liquid separator (11)；Described air circulating umbilical (7) one end is connected with the air outlet (H5), institute
It states air circulating umbilical (7) other end to be connected with return air inlet (H6), is successively arranged air inlet circulated air on the air circulating umbilical (7)
Machine (9), condenser (14), evaporator (19), outlet air of air inlet circulating fan (9) setting in the air circulating umbilical (7)
On mouth one end (H6), air circulating umbilical (7) and institute of the heat exchanger (15) between the condenser (14), evaporator (19)
It states and carries out heat exchange on the air circulating umbilical (7) between evaporator (19), return air inlet (H6)；It is the auxiliary condenser (13), cold
Condenser (14), liquid storage device (16), filter (17), expansion valve (18), evaporator (19), gas-liquid separator (11), compressor
(12) connection is circuited sequentially through air set pipe (21).
2. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system according to claim 1, which is characterized in that described
Homogenating plate (3) are equipped between sludge at low temperature desiccation slot (H1) and inlet air plenum (H3), the homogenating plate (3) is equipped with multiple ventilation holes
(20)；Return air circulating fan (6) are equipped in the return air chamber (H4), the return air circulating fan (6) is arranged in the return air inlet
(H6) on.
3. a kind of continuous deep dehydration cooperating with low-temperature sludge drying system according to claim 1, which is characterized in that described
Evaporator (19) is circumscribed with condensate pipe (8), and the evaporator (19) is connected through condensate pipe (8) with condensation water tank (I).
4. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method, which is characterized in that first connect to primary dewatering sludge
After continuous deep dehydration processing, then low temperature drying and other treatment is carried out, the continuous deep dehydration processing includes that sludge modification and squeezing are de-
Water treatment procedure；
The low temperature drying and other treatment, specifically includes the following steps:
A) sludge at low temperature desiccation slot will be inputted by dewatered sludge buffering chamber through continuous deep dehydration treated sludge；
B) the drying hot-air for generating air dry-set after refrigeration is handled and is dried, by air outlet through inlet air plenum
Flow through sludge at low temperature desiccation slot；
C the damp-heat air generated after) again contacting dry hot-air with sludge, back flows back into air by return air inlet through return air chamber and does
In dry device, carries out refrigeration processing and generate dry hot-air after being dried；
D) circulation carries out step B to C；
The refrigeration processing, specifically includes the following steps:
A1 the low temperature low pressure gas refrigerant reserved in air set pipe) is formed into high temperature and high pressure gas after compressor is handled；
A2 high temperature and high pressure gas successively) was formed into cold air after auxiliary condenser, condenser processing, and by the heat of generation
Damp-heat air is heated in condenser；
A3 cold air successively) is formed into low-pressure gas-liquid mixture after the processing of liquid storage device, filter and expansion valve；
A4 low-pressure gas-liquid mixture successively) is re-formed into low temperature low pressure gas refrigeration after evaporator, gas-liquid separator processing
Agent；
A5) circulation carries out step A1 to A4.
5. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method according to claim 4, which is characterized in that described
Continuous deep dehydration processing, specifically includes the following steps:
1) sludge modification: primary dewatering sludge is inputted in sludge modification mixing machine, and composite modifier is added and is modified reaction；
2) press dewatering: sludge modified in step 1) is inputted in sludge dewatering equipment and carries out press dewatering.
6. a kind of continuous deep dehydration cooperating with low-temperature sludge drying method according to claim 4, which is characterized in that described
It is dried, specifically includes the following steps:
B1 damp-heat air) is flowed into air dry-set through air circulating umbilical, evaporator is entered after heat exchanger tentatively cools down；
B2 after) further cooling down in evaporator, the condensed water of generation is discharged by condensate pipe, removes the air of moisture removal again
Enter condenser after heat exchanger tentatively heats；
B3 after) further heating in condenser, the drying hot-air of generation is flowed out into air dry-set through air circulating umbilical
B4) circulation carries out step B1 to B3.
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| CN108426426A (en) * | 2018-05-15 | 2018-08-21 | 武汉都市环保工程技术股份有限公司 | A kind of sludge dehumidification type multistage recuperation of heat anhydration system |
| CN111847824A (en) * | 2020-08-25 | 2020-10-30 | 北控水务(中国)投资有限公司 | Three-stage type dewatering and drying system and method for sludge in domestic sewage treatment plant |
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Effective date of registration: 20210719 Address after: 201703 room 82, block a, 7 / F, 348 Gongyuan Road, Qingpu District, Shanghai Patentee after: SHANGHAI ZHONGYAO ENVIRONMENTAL PROTECTION INDUSTRIAL Co.,Ltd. Patentee after: SHANGHAI SHENYAO ENVIRONMENTAL PROTECTION ENGINEERING Co.,Ltd. Address before: 201703 room 82, block a, 7 / F, 348 Gongyuan Road, Qingpu District, Shanghai Patentee before: SHANGHAI ZHONGYAO ENVIRONMENTAL PROTECTION INDUSTRIAL Co.,Ltd. |