CN110078349A - A kind of sludge at low temperature desiccation apparatus and method - Google Patents
A kind of sludge at low temperature desiccation apparatus and method Download PDFInfo
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- CN110078349A CN110078349A CN201910468535.4A CN201910468535A CN110078349A CN 110078349 A CN110078349 A CN 110078349A CN 201910468535 A CN201910468535 A CN 201910468535A CN 110078349 A CN110078349 A CN 110078349A
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- sludge
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- 239000010802 sludge Substances 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012546 transfer Methods 0.000 claims abstract description 40
- 238000001035 drying Methods 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims description 24
- 238000000605 extraction Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000009423 ventilation Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004332 deodorization Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 208000032370 Secondary transmission Diseases 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
Abstract
The present invention relates to sludge drying processing technology field, a kind of sludge at low temperature desiccation apparatus and method are provided.Device provided by the invention includes storage mud box, a grade low-temp anhydration system, two grade low-temp anhydration systems, PLC intelligence control system；The one grade low-temp anhydration system includes a grade low-temp desiccation room, air-introduced machine, level-one desiccation filter, level-one desiccation gas-liquid separator and heat pump；The two grade low-temps anhydration system includes two grade low-temp desiccation rooms, vacuum pump, second level desiccation filter, second level desiccation gas-liquid separator and heat transfer exocoel.The technology that heat pump energy source is recycled and is evaporated in vacuo has been respectively adopted in a grade low-temp anhydration system and two grade low-temp anhydration systems in the device, sludge drying efficiency can be effectively improved at a lower temperature, reduce energy consumption, drying process does not generate foul smell, has safety and stability, clean and environmental protection, energy-efficient and high industrial utilization value.
Description
Technical field
The present invention relates to sludge drying processing technology field, in particular to a kind of sludge at low temperature desiccation apparatus and method.
Background technique
With the development of economy with the raising of living standards of the people, urbanization process constantly accelerates, and trade effluent, life are dirty
Water production is increasing, and sludge yield is also growing day by day therewith.For this purpose, country supports mud decrement and incineration technology energetically,
Wherein sludge drying technique stability is strong, one of important method of mud decrement.
Currently, sludge drying process equipment both domestic and external specifically includes rotary kiln hot wind based on use heat drying technology
Desiccation, hot air conveying type desiccation, fluid bed heat air-driedization, oar blade type desiccation etc., but these traditional handicraft thermal energy consumptions are big, technology warp
It helps poor.In addition, the operating temperature of traditional heat drying technology is generally needed up to 110 DEG C or more, drying process can generate a large amount of powder
Dirt and foul smell need to additionally increase facility processing.
In recent years, using the sludge at low temperature drying technique of dehumidifying heat pump working principle gradually by everybody favor, but it is dried
The evaporation capacity of moisture in sludge is also limited while reducing temperature during dry.At a certain temperature, when being saturated in drying room
When vapor reaches corresponding limit value, sufficiently long drying time is needed to can be only achieved sludge ideal desiccation effect, in this way,
The power consumption of electrical equipment is just increased indirectly, and energy-saving effect is unobvious.
Summary of the invention
In view of this, it is an object of that present invention to provide a kind of energy-efficient sludge at low temperature desiccation apparatus and method, it can
The exhaust gas emission problem in mud drying process is solved, while improving sludge drying efficiency, reduces sludge drying energy consumption, there is peace
Entirely, the advantages that environmentally friendly, efficient, stable and economic.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of sludge at low temperature desiccation apparatus, including storage mud box, a grade low-temp anhydration system, two grade low-temps
Anhydration system and PLC intelligence control system；
The one grade low-temp anhydration system includes a grade low-temp desiccation room, air-introduced machine, level-one desiccation filter, level-one desiccation
Gas-liquid separator and heat pump；The one grade low-temp desiccation room, air-introduced machine, level-one desiccation filter, level-one desiccation gas-liquid separator
It is sequentially connected with, is formed into a loop by ventilation shaft with heat pump；The one grade low-temp desiccation room is provided with air outlet and air inlet, institute
State the outlet air of air-introduced machine and a grade low-temp desiccation room
The air inlet connection of mouth connection, the heat pump and a grade low-temp desiccation room；
The two grade low-temps anhydration system includes two grade low-temp desiccation rooms, vacuum pump, second level desiccation filter, second level desiccation
Gas-liquid separator and heat transfer exocoel；The two grade low-temps desiccation room, vacuum pump, second level desiccation filter and second level desiccation gas-liquid point
It is sequentially connected with from device by ventilation shaft；The gas vent of the second level desiccation gas-liquid separator passes through ventilation shaft and heat pump
Entrance connection；
The heat transfer exocoel is wrapped in two grade low-temp desiccation outdoors, and the heat transfer exocoel is provided with air inlet and outlet air
Mouthful, the air inlet and air outlet of the heat transfer exocoel pass through ventilation shaft respectively and the export and import of heat pump connects, and is formed back
Road；
The storage mud box is connect with the grade low-temp desiccation room by level-one desiccation mud inlet, and the level-one desiccation is into mud
Level-one desiccation electrically operated valve is installed on mouthful；The one grade low-temp desiccation room and two grade low-temp desiccation rooms pass through second level desiccation into mud
Mouth connects, and is equipped with second level desiccation electrically operated valve on the second level desiccation mud inlet；
The sludge at low temperature desiccation apparatus is additionally provided with feed inlet, and sludge is entered in storage mud box by feed inlet；
The PLC intelligence control system is used to control the operation of sludge at low temperature desiccation apparatus.
Preferably, level-one desiccation conveyer belt is provided in the grade low-temp desiccation room；In the two grade low-temps desiccation room
It is provided with second level desiccation conveyer belt；The level-one desiccation conveyer belt and second level desiccation conveyer belt independently include multilayer conveyer belt,
The direction of transfer of adjacent conveyor belts is opposite.
Preferably, the conveyer belt number of plies of the level-one desiccation conveyer belt and second level desiccation conveyer belt independently is 4~5 layers.
Preferably, the heat pump and a grade low-temp desiccation room air inlet, heat transfer exocoel air inlet are connected by electric T-shaped valve
It connects, by the output of electric three passes valve regulation hot run test, when only starting a grade low-temp anhydration system, electric T-shaped valve is only to one
Grade low-temp desiccation room exports hot run test, and when only starting two grade low-temp anhydration systems, electric T-shaped valve is only to heat transfer exocoel output
Hot run test, when a grade low-temp anhydration system, two grade low-temp anhydration systems start simultaneously, electric T-shaped valve is simultaneously to a grade low-temp
Desiccation room, heat transfer exocoel export hot run test.
Preferably, the grade low-temp desiccation room bottom conveyer belt exit side is equipped with level-one desiccation controllable register and level-one
Dewatered sludge mud mouth, wherein level-one desiccation controllable register is used to control the mud extraction direction of a grade low-temp desiccation room sludge.
Preferably, the two grade low-temps desiccation room bottom conveyer belt exit side is equipped with second level desiccation controllable register and second level
Dewatered sludge mud mouth, wherein second level desiccation controllable register is used to control the mud extraction direction of two grade low-temp desiccation room sludge, control
The switch of second level dewatered sludge mud mouth.
Preferably, the sludge at low temperature desiccation apparatus is additionally provided with total discharge outlet；The level-one desiccation gas-liquid separator and
The liquid outlet of second level desiccation gas-liquid separator is connected by pipeline with total discharge outlet.
Preferably, the filtrate in the level-one desiccation filter and second level desiccation filter is filtering cotton core or active carbon.
The present invention provides a kind of methods for carrying out sludge at low temperature desiccation using above-mentioned apparatus, comprising the following steps:
(1) wet mud enters storage mud box through feed inlet, and the moisture content of the wet mud is 60~85%；
(2) PLC intelligence control system is according to the equipment in sludge drying target moisture control sludge at low temperature anhydration system
And controlled valve, specifically:
When sludge target water content requirement reaches 30~50%, only start a grade low-temp anhydration system, wet mud is one
From the continuous mud extraction of level-one desiccation mud mouth after desiccation in grade low-temp desiccation room；
When sludge target water content requirement reaches 10~30%, a grade low-temp anhydration system and two grade low-temp anhydration systems
Alternately start, after wet mud is paved with level-one conveyer belt, level-one desiccation electrically operated valve is closed, grade low-temp anhydration system starting, wet
Sludge in a grade low-temp desiccation room desiccation to moisture content be 30~50% after, it is low that level-one dewatered sludge is all delivered to second level
Warm desiccation room, then second level desiccation electrically operated valve is closed, the starting of two grade low-temp anhydration systems, while level-one desiccation electrically operated valve weight
It is new to open, after next group wet mud is uniformly paved with level-one desiccation conveyer belt, grade low-temp anhydration system restarting, so not
Disconnected cycle alternation operation；Dewatered sludge is from second level desiccation mud mouth batch-type mud extraction.
Preferably, the drying air temperature that heat pump exports in the grade low-temp anhydration system is 40~80 DEG C
Preferably, the heat supply temperature of heat transfer exocoel is 40~80 DEG C in the two grade low-temps anhydration system；The second level is low
The warm indoor vacuum degree of desiccation is 0.08~0.0109Mpa.
The utility model has the advantages that
(1) device provided by the invention is energy-efficient, in conjunction with dehumidifying heat pump principle and temperature and saturated vapor pressure, vacuum
Moisture percentage in sewage sludge is reduced to 10~30% from 60~85% within a short period of time, improves sludge drying efficiency, together by the relationship of degree
When reduce electrical equipment use the time, reduce energy consumption；
(2) device usage range provided by the invention is wide, is applicable to the desiccation of domestic sludge and all types of industrial sludges,
Mud extraction moisture content can arbitrarily be adjusted in 10~50%, meet user's difference needs；
(3) device operational safety provided by the invention, stabilization, environmental protection, entire mud drying process in confined space into
Row, and it is heating equipment that dehumidifying heat pump, which is used only, running temperature is low, no dust hazard, and no hidden peril of explosion does not generate foul smell, nothing
Deodorization device need to be installed；
(4) device provided by the invention uses PLC intelligent control, can automatically control sludge according to different sludge drying degree
Anhydration system, Operation and Maintenance workload is few, saves a large amount of costs of labor；
(5) device provided by the invention is the integrated design, convenient transportation and installation.
Detailed description of the invention
Fig. 1 is the inside structure schematic diagram of low temperature desiccation apparatus of the present invention；
Fig. 2 is the outside drawing of low temperature desiccation apparatus of the present invention；
In attached drawing 1~2: 1- feed inlet；2- stores up mud box；3- level-one desiccation mud inlet；4- level-one desiccation electrically operated valve；5- mono-
Grade low-temp desiccation room；6- level-one desiccation conveyer belt；7- second level desiccation conveyer belt；8- air-introduced machine；9- level-one desiccation filter；10-
Level-one desiccation gas-liquid separator；11- heat pump；12- level-one desiccation controllable register；13- second level desiccation mud inlet；14- second level desiccation
Electrically operated valve；The bis- grade low-temp desiccation room 15-；16- vacuum pump；17- second level desiccation filter；18- second level desiccation gas-liquid separator；
19- heat transfer exocoel；20- second level desiccation controllable register；21-PLC intelligence control system；22- level-one dewatered sludge mud mouth；23-
Second level dewatered sludge mud mouth；The total discharge outlet of 24-；Mono- grade low-temp desiccation room air outlet of 25-；The mono- grade low-temp desiccation room 26- air inlet
Mouthful；27- electric T-shaped valve；28- heat transfer exocoel air inlet；29- heat transfer exocoel air outlet.
Fig. 3 is sludge at low temperature drying process flow diagram of the invention.
Specific embodiment
The present invention provides a kind of sludge at low temperature desiccation apparatus, and structure is as shown in Fig. 1~2, in Fig. 1~2,1- feed inlet；
2- stores up mud box；3- level-one desiccation mud inlet；4- level-one desiccation electrically operated valve；The mono- grade low-temp desiccation room 5-；6- level-one desiccation transmission
Band；7- second level desiccation conveyer belt；8- air-introduced machine；9- level-one desiccation filter；10- level-one desiccation gas-liquid separator；11- heat pump；
12- level-one desiccation controllable register；13- second level desiccation mud inlet；14- second level desiccation electrically operated valve；The bis- grade low-temp desiccation room 15-；
16- vacuum pump；17- second level desiccation filter；18- second level desiccation gas-liquid separator；19- heat transfer exocoel；20- second level desiccation is adjusted
Baffle；21-PLC intelligence control system；22- level-one dewatered sludge mud mouth；23- second level dewatered sludge mud mouth；24- is always drained
Mouthful；Mono- grade low-temp desiccation room air outlet of 25-；Mono- grade low-temp desiccation room air inlet of 26-；27- electric T-shaped valve；28- heat transfer exocoel
Air inlet；29- heat transfer exocoel air outlet.
Device provided by the invention includes storage mud box, a grade low-temp anhydration system, two grade low-temp anhydration systems and PLC intelligence
Control system.
Device provided by the invention includes storage mud box.In the present invention, the storage mud box is preferably placed at the sludge at low temperature
The top of desiccation apparatus is funnel-form, and described device is provided with feed inlet, and sludge is entered in the storage mud box by feed inlet.
Device provided by the invention includes a grade low-temp anhydration system.In the present invention, the grade low-temp anhydration system
Including a grade low-temp desiccation room, air-introduced machine, level-one desiccation filter, level-one desiccation gas-liquid separator and heat pump；The level-one is low
Warm desiccation room, air-introduced machine, level-one desiccation filter, level-one desiccation gas-liquid separator and heat pump are sequentially connected with by ventilation shaft,
Forming circuit；The one grade low-temp desiccation room is provided with air outlet and air inlet, the air-introduced machine and a grade low-temp desiccation room
The air inlet connection of air outlet connection, the heat pump and a grade low-temp desiccation room.In the present invention, the air outlet is preferably provided with
In grade low-temp desiccation ceiling portion, the air inlet is preferably provided at the grade low-temp desiccation room bottom, so that heat is dry
Wind forms the form of bottom-up transmission in a grade low-temp desiccation room, increases the utilization rate of hot run test.
In the present invention, level-one desiccation conveyer belt is provided in the grade low-temp desiccation room；The level-one desiccation transmission
Band preferably includes multilayer conveyer belt, and the number of plies of the conveyer belt is preferably 4~5 layers；The direction of transfers of adjacent conveyor belts on the contrary, and
It is arranged in parallel, the discharge end of a upper conveyer belt is respectively positioned on above the feed end of lower section adjacent conveyor belts, and bottom conveyer belt will be dirty
Mud is delivered to level-one dewatered sludge mud mouth or two grade low-temp desiccation rooms；At runtime, sludge is in end to end on a moving belt
Transmission mode, such as: sludge transmits on first layer conveyer belt from left to right first, makes a clean sweep of from the discharging of first layer conveyer belt
The feed end of second layer conveyer belt is fallen on, then right-to-left transmits on second layer conveyer belt, from going out for second layer conveyer belt
Material makes a clean sweep of the feed end for falling on third layer conveyer belt, then transmits from left to right again, and so on.
In the present invention, the grade low-temp desiccation room bottom conveyer belt exit side is preferably also provided with level-one desiccation adjusting
Baffle and level-one dewatered sludge mud mouth, wherein level-one desiccation controllable register is used to control the mud extraction of a grade low-temp desiccation room sludge
Direction, when level-one desiccation controllable register is connected with second level desiccation mud inlet, a grade low-temp desiccation room sludge is passed from the last layer
It send band to be sent to second level desiccation mud inlet to enter in two grade low-temp desiccation rooms, when level-one desiccation controllable register and level-one dewatered sludge
When mud mouth is connected, a grade low-temp desiccation room sludge is sent to level-one dewatered sludge mud mouth discharge dress from the last layer conveyer belt
It sets outer.
In the present invention, the storage mud box is connect with the grade low-temp desiccation room by level-one desiccation mud inlet, described
Level-one desiccation electrically operated valve is installed on level-one desiccation mud inlet, the level-one desiccation electrically operated valve can control level-one desiccation into
Mud mouth being opened and closing.
Device provided by the invention includes two grade low-temp anhydration systems.In the present invention, the two grade low-temps anhydration system
Including two grade low-temp desiccation rooms, vacuum pump, second level desiccation filter, second level desiccation gas-liquid separator and heat transfer exocoel；Described two
Grade low-temp desiccation room, vacuum pump, second level desiccation filter and second level desiccation gas-liquid separator are sequentially connected with by ventilation shaft；Institute
The gas vent for stating second level desiccation gas-liquid separator is connected by the entrance of ventilation shaft and heat pump；The heat transfer exocoel is wrapped in
Two grade low-temp desiccation outdoors, the heat transfer exocoel are provided with air inlet and air outlet, the air inlet of the heat transfer exocoel and go out
Air port passes through ventilation shaft respectively and the export and import of heat pump connects, forming circuit.
In the present invention, second level desiccation conveyer belt, the second level desiccation are preferably provided in the two grade low-temps desiccation room
The form and the number of plies of transmission belt are preferably identical with the level-one desiccation transmission belt, and details are not described herein.
In the present invention, the grade low-temp desiccation room is connect with two grade low-temp desiccation rooms by second level desiccation mud inlet,
Second level desiccation electrically operated valve is installed, the second level desiccation electrically operated valve can control control two on the second level desiccation mud inlet
Grade desiccation mud inlet being opened and closing.
In the present invention, the two grade low-temps desiccation room bottom conveyer belt exit side is preferably provided with second level desiccation and adjusts gear
Plate and second level dewatered sludge mud mouth, wherein second level desiccation controllable register is used to control the mud extraction side of two grade low-temp desiccation room sludge
To, control second level dewatered sludge mud mouth switch；When second level desiccation controllable register is by secondary transmission end of tape discharge port and two
When grade dewatered sludge mud mouth is connected, second level dewatered sludge is from outside second level dewatered sludge mud mouth discharger, when needing two
When grade low-temp desiccation room needs to vacuumize, the second level desiccation controllable register closes second level dewatered sludge mud mouth, cooperates it
His equipment makes two grade low-temp desiccation rooms form vacuum state.
In the present invention, the heat pump preferably passes through electronic with a grade low-temp desiccation room air inlet, heat transfer exocoel air inlet
Triple valve connection, passes through the output of electric three passes valve regulation hot run test, when only starting a grade low-temp anhydration system, electric three passes
Valve only exports hot run test to a grade low-temp desiccation room, and when only starting two grade low-temp anhydration systems, electric T-shaped valve is only to heat transfer
Exocoel export hot run test, when a grade low-temp anhydration system, two grade low-temp anhydration systems simultaneously start when, electric T-shaped valve simultaneously to
One grade low-temp desiccation room, heat transfer exocoel export hot run test.In the present invention, the grade low-temp anhydration system and two grade low-temps are dry
Change system by heat pump provide heat, in use, the heat pump by ventilation shaft be respectively a grade low-temp desiccation room and
The exocoel that conducts heat conveys hot run test, and wherein one hot run test enters from a grade low-temp desiccation room bottom, completes heat exchange simultaneously with sludge
Moisture is taken away, the low temperature humid air of generation is extracted out by air-introduced machine, after level-one desiccation filter removes impurity, into level-one
Gas-liquid separator, condensed water are discharged by pipeline, and Cryogenic air is sent into a grade low-temp desiccation room after drying again by heat pump,
So constantly recycle；Another strand of hot run test enters heat transfer exocoel, constantly provides heat for two grade low-temp desiccation rooms, and pass through ventilation
Pipeline is connect with heat pump air inlet, forming circuit.The present invention is simultaneously a grade low-temp desiccation room using heat pump as heating equipment
Hot run test is conveyed with heat transfer exocoel, and controls the conveying direction of hot run test by electric T-shaped valve, the running temperature of device is low,
Without dust hazard, no hidden peril of explosion, and foul smell is not generated, without installing deodorization device, and it can be realized heat recovery,
It can be effectively reduced energy consumption, improve drying efficiency.
In addition, vacuum pump is also equipped in two grade low-temp anhydration systems of the invention, in use, the vacuum pump is certainly
The low temperature humid air extracted out in two grade low-temp desiccation rooms, low temperature humid air enter after second level desiccation filter removes impurity
Second level desiccation gas-liquid separator, the condensed water isolated are discharged by pipeline, and Cryogenic air enters after being sent into heat pump drying
One grade low-temp desiccation room and heat transfer exocoel, so constantly recycle.The present invention utilizes vacuum evaporation in two grade low-temp anhydration systems
Technology improves the evaporation rate of moisture, further increases drying efficiency.
In the present invention, the sludge at low temperature desiccation apparatus is preferably additionally provided with total discharge outlet；The level-one desiccation gas-liquid
Separator is connected by pipeline with total discharge outlet with the liquid outlet of second level desiccation gas-liquid separator；In the present invention, institute
The filtrate stated in level-one desiccation filter and second level desiccation filter preferably filters cotton core or active carbon.
Device provided by the invention includes PLC intelligence control system, and the PLC intelligence control system is low for controlling sludge
The operation of warm desiccation apparatus, operation, valve and the closing of baffle etc. including controlling all devices.In the present invention, the dress
A grade low-temp anhydration system and two grade low-temp anhydration systems in setting can be activated individually, and can also start simultaneously, when concrete application
According to circumstances selected.
The specific type of the present invention each device, valve described in above scheme and baffle does not have particular/special requirement, uses
Above-mentioned apparatus, valve and baffle well known to those skilled in the art, corresponding functions can be realized.
The present invention provides a kind of methods for carrying out sludge at low temperature desiccation using above scheme described device, including following step
It is rapid:
(1) wet mud enters storage mud box through feed inlet, and the moisture content of the wet mud is 60~85%；
(2) PLC intelligence control system is according to the equipment in sludge drying target moisture control sludge at low temperature anhydration system
And controlled valve, specifically:
When sludge target water content requirement reaches 30~50%, only start a grade low-temp anhydration system, wet mud is one
From the continuous mud extraction of level-one desiccation mud mouth after desiccation in grade low-temp desiccation room；
When sludge target water content requirement reaches 10~30%, a grade low-temp anhydration system and two grade low-temp anhydration systems
Alternately start, after wet mud is paved with level-one conveyer belt, level-one desiccation electrically operated valve is closed, grade low-temp anhydration system starting, wet
Sludge in a grade low-temp desiccation room desiccation to moisture content be 30~50% after, it is low that level-one dewatered sludge is all delivered to second level
Warm desiccation room, then second level desiccation electrically operated valve is closed, the starting of two grade low-temp anhydration systems, while level-one desiccation electrically operated valve weight
It is new to open, after next group wet mud is uniformly paved with level-one desiccation conveyer belt, grade low-temp anhydration system restarting, so not
Disconnected cycle alternation operation；Dewatered sludge is from second level desiccation mud mouth batch-type mud extraction.
In the present invention, wet mud enters storage mud box through feed inlet first, keeps in storage mud box, waits desiccation.?
In the present invention, the moisture content of the wet mud is 60~85%.
After wet mud enters storage mud box, PLC intelligence control system is according to sludge drying target moisture control sludge at low temperature
Equipment and controlled valve in anhydration system.
In the present invention, when sludge target water content requirement reaches 30~50%, only start a grade low-temp anhydration system,
Wet mud is in a grade low-temp desiccation room from the continuous mud extraction of level-one desiccation mud mouth, specific operating method are as follows: first after desiccation
Level-one desiccation electrically operated valve is opened, second level desiccation electrically operated valve is closed, starting level-one desiccation conveyer belt makes to store up the wet dirt in mud box
Mud is uniformly fallen on it；The hot dry air that heat pump generates enters from a grade low-temp desiccation room bottom, takes away wet dirt on conveyer belt
The low temperature humid air of the moisture of mud, generation is extracted out by air-introduced machine, after level-one desiccation filter removes impurity, into level-one
The condensed water of desiccation gas-liquid separator, generation is discharged by pipeline, and low temperature dry air is converted into hot dry air using heat pump and send
Into a grade low-temp desiccation room, so constantly recycle；The dry dirt that control level-one desiccation controllable register falls the last item conveyer belt
Mud, which unloads, drops down onto level-one dewatered sludge mud mouth.
In the present invention, when sludge target water content requirement reaches 10~30%, a grade low-temp anhydration system and second level
Low temperature anhydration system alternately starts, and dewatered sludge is from second level desiccation mud mouth batch-type mud extraction；Specific operating method are as follows: (1)
After wet mud falls and is uniformly paved with level-one desiccation conveyer belt, level-one desiccation electrically operated valve is closed, and is stopped into mud, level-one desiccation passes
It send band to shut down, controls level-one desiccation controllable register, close level-one dewatered sludge mud mouth, fall level-one dewatered sludge can
Second level desiccation mud inlet；The starting of (2) one grade low-temp anhydration systems, wet mud desiccation to moisture content in a grade low-temp desiccation room are
30~50%, the method for operation of a grade low-temp anhydration system is consistent with above scheme；(3) wet sludge anhydration to moisture content be 30~
After 50%, a grade low-temp anhydration system is closed, and second level desiccation electrically operated valve is opened, level-one desiccation conveyer belt, second level desiccation transmission
Band starts simultaneously, until level-one dewatered sludge is simultaneously stopped after being uniformly paved with second level desiccation conveyer belt；(4) second level desiccation electricity is closed
Movable valve, second level desiccation controllable register close second level dewatered sludge mud mouth, so that two grade low-temp desiccation rooms is in air-tight state, open
Dynamic vacuum pump, heat pump continuous service, dry-heat air enter heat transfer exocoel, make to keep certain temperature and very two the grade low-temp desiccation room in
Reciprocal of duty cycle, the moisture in sludge are constantly gasificated into vapor and are extracted out by vacuum pump, and vapor is removed by second level desiccation filter
Enter second level desiccation gas-liquid separator after impurity, condensed water is discharged by drainage pipeline, and low temperature dry air is converted using heat pump
A grade low-temp desiccation room is sent into for hot dry air；After sludge is dried to target moisture content in (5) two grade low-temp desiccation rooms, stop true
Sky pump operates second level desiccation conveyer belt, the dewatered sludge that control second level desiccation controllable register falls the last item conveyer belt again
It unloads and drops down onto second level dewatered sludge mud mouth, dewatered sludge is from second level desiccation mud mouth batch-type mud extraction；In addition, dry in two grade low-temps
Level-one desiccation electrically operated valve reopens while change system starts, and is uniformly paved with level-one desiccation conveyer belt to next group wet mud
Afterwards, a grade low-temp anhydration system restarts, so constantly cycle alternation operation.
In the present invention, the drying air temperature that heat pump exports in the grade low-temp anhydration system is preferably 40~80
DEG C, more preferably 50~70 DEG C；The heat supply temperature of heat transfer exocoel is preferably 40~80 DEG C in the two grade low-temps anhydration system, more
Preferably 50~70 DEG C；The indoor vacuum degree of two grade low-temps desiccation is preferably 0.08~0.0109Mpa, more preferably
0.09Mpa。
Sludge at low temperature drying process flow diagram of the invention is as shown in Figure 3；The working principle of the invention is: due to
Saturated vapor is pressed with corresponding limit value in a certain temperature, and temperature is lower, and saturated vapor pressure is lower, and the moisture evaporation in sludge is got over
Slowly, if the moisture in sludge need to be further decreased, the long period is needed；Therefore a grade low-temp anhydration system of the invention is first
Using dehumidifying heat pump principle, first cryogenic conditions, in the short period by moisture content be 60~85% wet mud be dried to it is aqueous
Rate is 30~50%；The relationship of evaporation capacity and saturated vapor pressure is recycled, two grade low-temp anhydration systems are started, keeps two grade low-temps dry
Change room and keep a certain temperature and vacuum degree, vapour pressure is caused to be unable to reach saturation value, the continuous Quick-gasifying of the moisture in sludge at
Vapor, so only needs the evaporation capacity that can increase moisture in sludge at low temperatures, and moisture percentage in sewage sludge reduces rapidly；By one
Grade low-temp anhydration system and two grade low-temp anhydration system R. concomitans, then can be such that within a short period of time wet mud moisture content is reduced to
30% or less.
Scheme provided by the invention is described in detail below with reference to embodiment, but they cannot be interpreted as pair
The restriction of the scope of the present invention.
Embodiment 1
Sludge drying is carried out using low temperature desiccation apparatus shown in FIG. 1 to FIG. 2, is included the following steps:
(1) wet mud of moisture content 60~85% enters storage mud box 2 through feed inlet 1 and keeps in, and waits desiccation；
(2) PLC intelligence control system 21 is according to setting in sludge drying target moisture control sludge at low temperature desiccation apparatus
Standby and controlled valve, tool operation are as follows:
Start a grade low-temp anhydration system, that is, be first turned on level-one desiccation electrically operated valve 4, closes second level desiccation electrically operated valve
14, start level-one desiccation conveyer belt 6, the wet mud stored up in mud box 2 is uniformly fallen on it；Heat pump 11 generate hot dry air from
One grade low-temp desiccation room, 5 bottom enters, and so that temperature in a grade low-temp desiccation room 5 is maintained at 55 DEG C or so, and take away level-one desiccation
The low temperature humid air of the moisture of wet mud on conveyer belt 6, generation is extracted out by air-introduced machine 8, by by being made using filtering cotton core
After the level-one desiccation filter 9 of filtrate removes impurity, into level-one desiccation gas-liquid separator 10, condensed water is discharged by pipeline,
Low temperature dry air is converted into hot dry air using heat pump 11 and is sent into a grade low-temp desiccation room 5；Control level-one desiccation controllable register
The dewatered sludge fallen from level-one desiccation conveyer belt 6 is unloaded and drops down onto level-one dewatered sludge mud mouth 22 by 12；So constantly more than circulation
Operation, continuous mud extraction；The conveying direction of hot run test is controlled by electric T-shaped valve 27 in drying process, and it is low that hot run test only enters level-one
In warm desiccation room 5.
It is 40% or so that level-one dewatered sludge moisture content is obtained after above step is handled, 50% or more decrement, than tradition
30% or more low temperature drying equipment energy conservation, wet mud are discharged from into a grade low-temp desiccation room to from level-one dewatered sludge mud mouth
Time be 90min.
Embodiment 2
Sludge drying is carried out using low temperature desiccation apparatus shown in FIG. 1 to FIG. 2, is included the following steps:
(1) wet mud of moisture content 60-85% enters storage mud box 2 through feed inlet 1 and keeps in, and waits desiccation；
(2) PLC intelligence control system 21 is according to setting in sludge drying target moisture control sludge at low temperature desiccation apparatus
Standby and controlled valve, concrete operations are as follows:
(2-1) opens level-one desiccation electrically operated valve 4, starts level-one desiccation conveyer belt 6, and wet mud falls and is uniformly paved with one
After grade desiccation conveyer belt 6, level-one desiccation electrically operated valve 4 is closed, and is stopped into mud, starts air-introduced machine 8, heat pump 11, hot dry air from
One grade low-temp desiccation room, 5 bottom enters, and so that temperature in a grade low-temp desiccation room 5 is maintained at 55 DEG C or so, and take away on conveyer belt
The low temperature humid air of the moisture of wet mud, generation is extracted out by air-introduced machine 8, by the level-one desiccation for making filtrate using filtering cotton core
After filter 9 removes impurity, into level-one desiccation gas-liquid separator 10, condensed water is discharged by drainpipe, and low temperature dry air is again
Hot dry air, which is converted into, by heat pump 11 is sent into a grade low-temp desiccation room 5；
(2-2) when wet mud is after a grade low-temp anhydration system desiccation to moisture content is 40%, control level-one desiccation is adjusted
Baffle 12 closes level-one dewatered sludge mud mouth 22, makes level-one dewatered sludge that can fall second level desiccation mud inlet 13, opens simultaneously
Second level desiccation electrically operated valve 14, while starting level-one desiccation conveyer belt 6, second level desiccation conveyer belt 7, until level-one dewatered sludge is equal
It is even be paved with second level desiccation conveyer belt 7 after be simultaneously stopped；Second level desiccation controllable register 20 closes second level dewatered sludge mud mouth 23, makes
Two grade low-temp desiccation rooms 15 are in air-tight state, start vacuum pump 16,11 continuous service of heat pump, and dry-heat air enters heat transfer exocoel
19, so that temperature in two grade low-temp desiccation rooms 15 is maintained at 40 DEG C, vacuum degree is higher than 0.093MPa, and the moisture in sludge constantly gasifies
It is extracted out at vapor and by vacuum pump 16, vapor passes through to be gone to clean using the second level desiccation filter 17 that filtering cotton core makees filtrate
Enter second level desiccation gas-liquid separator 18 after matter, condensed water is discharged by drainpipe, and low temperature dry air is converted using heat pump 11
A grade low-temp desiccation room 5 is sent into for hot dry air；In two grade low-temp desiccation rooms 15 after sludge drying, vacuum pump 16 stops, second level
Desiccation conveyer belt 7 operates again, and control second level desiccation controllable register 20 drops the dewatered sludge fallen from second level desiccation conveyer belt 7
To second level dewatered sludge mud mouth 23；
After first level-one dewatered sludge is delivered to two grade low-temp desiccation rooms 15 by one grade low-temp desiccation room 5, second level desiccation
Electrically operated valve 14 is closed, the starting of two grade low-temp anhydration systems, while level-one desiccation electrically operated valve 4 reopens, wet to next group
After sludge is uniformly paved with a grade low-temp desiccation conveyer belt 6, grade low-temp anhydration system restarting repeats step (2-1)-(2-
2), so constantly cycle alternation running；The conveying direction of hot run test is controlled by electric T-shaped valve 27 in the above process, when only starting
When one grade low-temp anhydration system, electric T-shaped valve 27 only exports hot run test to a grade low-temp desiccation room 5, when only starting two grade low-temps
When anhydration system, electric T-shaped valve 27 only exports hot run test to heat transfer exocoel 19, when a grade low-temp anhydration system, two grade low-temps are dry
When change system starts simultaneously, electric T-shaped valve 27 exports hot run test to a grade low-temp desiccation room 5, heat transfer exocoel 19 simultaneously.
It is 10% or so through above step treated second level dewatered sludge moisture content, 85% or more decrement is lower than tradition
Warm 60% or more drying equipment energy conservation, the total time of the wet sludge anhydration of a batch are 120min.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of sludge at low temperature desiccation apparatus, which is characterized in that dry including storage mud box, a grade low-temp anhydration system, two grade low-temps
Change system and PLC intelligence control system；
The one grade low-temp anhydration system includes a grade low-temp desiccation room, air-introduced machine, level-one desiccation filter, level-one desiccation gas-liquid
Separator and heat pump；The one grade low-temp desiccation room, air-introduced machine, level-one desiccation filter, level-one desiccation gas-liquid separator and heat
Pump is sequentially connected with by ventilation shaft, is formed into a loop；The one grade low-temp desiccation room is provided with air outlet and air inlet, described to draw
The air inlet connection of blower and the connection of the air outlet of a grade low-temp desiccation room, the heat pump and a grade low-temp desiccation room；
The two grade low-temps anhydration system includes two grade low-temp desiccation rooms, vacuum pump, second level desiccation filter, second level desiccation gas-liquid
Separator and heat transfer exocoel；The two grade low-temps desiccation room, vacuum pump, second level desiccation filter and second level desiccation gas-liquid separator
It is sequentially connected with by ventilation shaft；The gas vent of the second level desiccation gas-liquid separator passes through the entrance of ventilation shaft and heat pump
Connection；
The heat transfer exocoel is wrapped in two grade low-temp desiccation outdoors, and the heat transfer exocoel is provided with air inlet and air outlet, institute
The air inlet and air outlet for stating heat transfer exocoel pass through ventilation shaft respectively and the export and import of heat pump connects, forming circuit；
The storage mud box is connect with the grade low-temp desiccation room by level-one desiccation mud inlet, on the level-one desiccation mud inlet
Level-one desiccation electrically operated valve is installed；The one grade low-temp desiccation room and two grade low-temp desiccation rooms are connected by second level desiccation mud inlet
It connects, second level desiccation electrically operated valve is installed on the second level desiccation mud inlet；
The sludge at low temperature desiccation apparatus is additionally provided with feed inlet, and sludge is entered in storage mud box by feed inlet；
The PLC intelligence control system is used to control the operation of sludge at low temperature desiccation apparatus.
2. the apparatus according to claim 1, which is characterized in that be provided with level-one desiccation biography in the grade low-temp desiccation room
Send band；Second level desiccation conveyer belt is provided in the two grade low-temps desiccation room；The level-one desiccation conveyer belt and second level desiccation pass
Sending band independently includes multilayer conveyer belt, and the direction of transfer of adjacent conveyor belts is opposite；The level-one desiccation conveyer belt and second level are dry
The conveyer belt number of plies for changing conveyer belt independently is 4~5 layers.
3. the apparatus of claim 2, which is characterized in that the heat pump and a grade low-temp desiccation room air inlet, heat transfer
Exocoel air inlet is connected by electric T-shaped valve, by the output of electric three passes valve regulation hot run test, when only starting a grade low-temp
When anhydration system, electric T-shaped valve only exports hot run test to a grade low-temp desiccation room, when only starting two grade low-temp anhydration systems,
Electric T-shaped valve only exports hot run test to heat transfer exocoel, when a grade low-temp anhydration system, two grade low-temp anhydration systems start simultaneously
When, electric T-shaped valve exports hot run test to a grade low-temp desiccation room, heat transfer exocoel simultaneously.
4. device according to claim 1 or 2, which is characterized in that the grade low-temp desiccation room bottom transmission is taken out of
Expect that side is equipped with level-one desiccation controllable register and level-one dewatered sludge mud mouth, wherein level-one desiccation controllable register is for controlling level-one
The mud extraction direction of low temperature desiccation room sludge.
5. device according to claim 1 or 2, which is characterized in that the two grade low-temps desiccation room bottom transmission is taken out of
Expect that side is equipped with second level desiccation controllable register and second level dewatered sludge mud mouth, wherein second level desiccation controllable register is for controlling second level
The mud extraction direction of low temperature desiccation room sludge, the switch for controlling second level dewatered sludge mud mouth.
6. the apparatus according to claim 1, which is characterized in that the sludge at low temperature desiccation apparatus is additionally provided with total draining
Mouthful；The liquid outlet of the level-one desiccation gas-liquid separator and second level desiccation gas-liquid separator passes through pipeline and total discharge outlet
It is connected.
7. the apparatus according to claim 1, which is characterized in that in the level-one desiccation filter and second level desiccation filter
Filtrate be filtering cotton core or active carbon.
8. a kind of method for carrying out sludge at low temperature desiccation using claim 1~7 any one described device, which is characterized in that
The following steps are included:
(1) wet mud enters storage mud box through feed inlet, and the moisture content of the wet mud is 60~85%；
(2) PLC intelligence control system according to the equipment in sludge drying target moisture control sludge at low temperature anhydration system and is opened
Closing valve, specifically:
When sludge target water content requirement reaches 30~50%, only start a grade low-temp anhydration system, wet mud is low in level-one
From the continuous mud extraction of level-one desiccation mud mouth after desiccation in warm desiccation room；
When sludge target water content requirement reaches 10~30%, a grade low-temp anhydration system and two grade low-temp anhydration systems alternating
Starting, after wet mud is paved with level-one conveyer belt, level-one desiccation electrically operated valve is closed, grade low-temp anhydration system starting, wet mud
After desiccation to moisture content is 30~50% in a grade low-temp desiccation room, level-one dewatered sludge is all delivered to two grade low-temps and is done
Change room, then second level desiccation electrically operated valve is closed, the starting of two grade low-temp anhydration systems, while level-one desiccation electrically operated valve is beaten again
It opens, after next group wet mud is uniformly paved with level-one desiccation conveyer belt, grade low-temp anhydration system restarting is so constantly followed
Ring alternate run；Dewatered sludge is from second level desiccation mud mouth batch-type mud extraction.
9. according to the method described in claim 8, it is characterized in that, the drying that heat pump exports in the grade low-temp anhydration system
Air themperature is 40~80 DEG C.
10. according to the method described in claim 8, it is characterized in that, the confession for the exocoel that conducts heat in the two grade low-temps anhydration system
Hot temperature is 40~80 DEG C；The indoor vacuum degree of two grade low-temps desiccation is 0.08~0.0109Mpa.
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