CN109650691A - The system and method for continuous processing municipal sludge - Google Patents
The system and method for continuous processing municipal sludge Download PDFInfo
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- CN109650691A CN109650691A CN201910087442.7A CN201910087442A CN109650691A CN 109650691 A CN109650691 A CN 109650691A CN 201910087442 A CN201910087442 A CN 201910087442A CN 109650691 A CN109650691 A CN 109650691A
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- inner cylinder
- pyrolysis
- sludge
- outer barrel
- oxygen content
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- 239000010802 sludge Substances 0.000 title claims abstract description 102
- 238000012545 processing Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000000197 pyrolysis Methods 0.000 claims abstract description 95
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000007789 gas Substances 0.000 claims abstract description 52
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000001301 oxygen Substances 0.000 claims abstract description 32
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 26
- 239000003610 charcoal Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000005979 thermal decomposition reaction Methods 0.000 claims abstract description 7
- 230000008676 import Effects 0.000 claims abstract description 5
- 238000011049 filling Methods 0.000 claims description 12
- 239000002737 fuel gas Substances 0.000 claims description 10
- 239000010801 sewage sludge Substances 0.000 claims description 9
- 230000008901 benefit Effects 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 16
- 238000005265 energy consumption Methods 0.000 description 9
- 239000002360 explosive Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010865 sewage Substances 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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- 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
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses the system and methods of continuous processing municipal sludge, wherein, the system of continuous processing municipal sludge includes: feeding device, pyrolysis installation, wicket cover and turning motor, pyrolysis installation includes inner cylinder and outer barrel, the rotatable setting of inner cylinder, and inner cylinder inner wall is equipped with helical blade, and feed screw is connected with the feed end of inner cylinder；Outer barrel is set on inner cylinder, and sealing cavity is formed between outer barrel and inner cylinder, and outer barrel is equipped with high-temperature medium entrance and heat transferring medium exports；Wicket cover is connected to the discharge end of inner cylinder, wicket cover includes that oxygen content detector, the first temperature measuring equipment, thermal decomposition product import, nitrogen inlet, pyrolysis gas outlet and charcoal outlet, the nitrogen inlet are automatically opened or are closed based on the display of the oxygen content detector.The high system safety and reliable for operation, can long-period stable operation, failure rate is low, can realize the continuous treatment of sludge using the system and avoid the generation of dioxin.
Description
Technical field
The invention belongs to environmental technology fields, in particular to the system and method for continuous processing municipal sludge.
Background technique
Currently, with the continuous improvement of water factory, China sewage treating efficiency, sludge yield continues to increase in recent years, if not
It can be carried out reasonable disposition, important pollution issue will be generated to environment.Domestic method for sludge treatment include burning, landfill, compost,
The methods of natural desiccation, above method can solve sewage sludge harmlessness, minimizing target to a certain extent, but the utilization of resources
Rate is poor.The energy therein will be recycled if can be carried out reasonable processing rich in large amount of organic in municipal sludge.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
Purpose is to propose the system and method for continuous processing municipal sludge.The high system safety and reliable for operation, can long period it is steady
Fixed operation, failure rate is low, the continuous treatment of sludge may be implemented using the system, and avoid the generation of dioxin, makes sludge
It gets utilization.
According to the first aspect of the invention, the invention proposes a kind of systems of continuous processing municipal sludge.According to this
The embodiment of invention, the system include:
Feeding device, the feeding device include sewage sludge feed storehouse and feed screw；
Pyrolysis installation, the pyrolysis installation include:
Inner cylinder, the rotatable setting of inner cylinder, and the inner cylinder inner wall are equipped with helical blade, the spiral
Charger is connected with the feed end of the inner cylinder；
Outer barrel, the outer barrel are set on the inner cylinder, and shape between the outer barrel and the inner cylinder
At sealing cavity, the outer barrel is equipped with high-temperature medium entrance and heat transferring medium exports；
Wicket cover, the wicket cover are connected to the discharge end of the inner cylinder, and the wicket cover includes oxygen content detection dress
It sets, the outlet of the first temperature measuring equipment, thermal decomposition product import, nitrogen inlet, pyrolysis gas outlet and charcoal, the nitrogen inlet is based on
The display of the oxygen content detector is automatically opened or is closed；
Turning motor, the turning motor are located at inner cylinder feed end side, and the turning motor output end is equipped with
Pinion gear, the inner cylinder outer wall are equipped with the gear wheel engaged with pinion gear, and the turning motor drives institute by pinion gear
Gear wheel rotation is stated, the gear wheel pushes the inner cylinder rotation.
The system of the continuous processing municipal sludge of the above embodiment of the present invention at least has the advantages that (1) can use
Sludge is supplied into inner cylinder, is driven using high-temperature medium for pyrolysis processing indirect heating, using turning motor by feeding device
The impetus of inner cylinder rotation and inner cylinder spiral inner wall blade keeps sludge mobile to inner cylinder discharge end, avoids tying
Burnt phenomenon, while carrying out pyrolytic reaction；(2) sealing to inner cylinder may be implemented by the material position in control sewage sludge feed storehouse,
Ensure thus to realize the pyrolysis charring of sludge for anoxybiotic environment in inner cylinder and prevent the generation of dioxin；(3) system safety
Property it is high, when the oxygen content that oxygen content detector show is more than setting value, nitrogen inlet can automatically open and to wicket cover
Middle supplement nitrogen, thus not only it is possible to prevente effectively from wicket cover generation fire and explosive risks, can also further ensure that inner cylinder is exhausted
Oxygen environment；(4) system is reliable for operation, can be with long-period stable operation, and failure rate is low, for example, standing with inner cylinder and passing through and dial
Flitch rotation promotes sludge to compare to the mode of discharging end motion, is pushed away in the present invention using inner cylinder rotation and helical blade
Movement with can effectively solve switch-plate and inner cylinder interfere and the rotation axis of switch-plate deform at high temperature into
And lead to the phenomenon that stopping work；It (5), can by driving inner cylinder rotation outer barrel opposing stationary using turning motor in the present invention
To further decrease the pressure load and power energy consumption of turning motor；(6) continuous treatment of sludge may be implemented and recycle dirt
CO, CH in mud4Equal gases simultaneously obtain charcoal, wherein charcoal can be used for nursery stock foster, afforestation, at air cleaning
The absorption of reason, the auxiliary material for building auxiliary material etc., to realize the resource utilization of sludge.
In addition, the system of continuous processing municipal sludge according to the above embodiment of the present invention can also have it is following additional
Technical characteristic:
In some embodiments of the invention, the system of continuous processing municipal sludge further comprises burner, described
Burner has fuel gas inlet and high-temperature flue gas outlet, and the fuel gas inlet is connected with the pyrolysis gas outlet, the high temperature
Exhanst gas outlet is connected with the high-temperature medium entrance.It is possible thereby to be that pyrolyzing sludge handles heat supply using pyrolysis gas burning, in turn
Reduce the dependence to extra power.
In some embodiments of the invention, the system of continuous processing municipal sludge further comprises purification device, described
Purification device is connected with the pyrolysis gas outlet and the fuel gas inlet respectively.It is possible thereby to further increase the quality of pyrolysis gas
And efficiency of combustion.
In some embodiments of the invention, the outer barrel inner wall is equipped with refractory brick, and the outer barrel and institute
Inner cylinder contact position is stated equipped with flexible sealing structure.It may thereby be ensured that exchanging work under high temperature environment to inner cylinder and outer barrel
The sealing effect of condition, Sealed sandwich gas leakage when avoiding inner cylinder relative to outer barrel rotation.
In some embodiments of the invention, the feed screw extend into 120~150mm inside the inner cylinder.
It is possible thereby to which air is brought into inner cylinder when further avoiding being fed into pyrolysis installation and influences pyrolysis efficiency and effect.
In some embodiments of the invention, the wicket cover and the inner cylinder contact position are equipped with flexible sealing knot
The contact position of structure, the inner cylinder and the feed screw is sealed using graphite packing.It is possible thereby to further increase close
Effect is sealed, outside air is avoided to enter wicket cover from wicket cover and inner cylinder contact position.
In some embodiments of the invention, the charcoal exit is equipped with blocking valve.Thus charcoal is delivered to
It is possible to prevente effectively from air enters wicket cover when exterior, avoid generating fire and explosive risks.
According to the second aspect of the invention, the invention proposes a kind of systems using above-mentioned continuous processing municipal sludge
The method for handling municipal sludge.According to an embodiment of the invention, this method comprises:
(1) sludge is supplied using the feeding device and carries out pyrolysis processing into the inner cylinder of the pyrolysis installation,
In, heat source is provided for the pyrolysis processing using high-temperature medium, pushes the inner cylinder to rotate using the turning motor, it is described
Discharging end motion of the sludge by the rotation of the inner cylinder and the promotion of the helical blade to the inner cylinder, carries out simultaneously
Pyrolytic reaction；(2) thermal decomposition product that step (1) obtains is supplied into the wicket cover and carries out solid gas separation, to obtain respectively
To pyrolysis gas and charcoal, wherein nitrogen inlet described in the display control based on the oxygen content detector plays open and close
It closes, to control the oxygen content in the wicket cover.
The method of the continuous processing municipal sludge of the above embodiment of the present invention at least has the advantages that (1) can pass through
Control sealing of the material position realization to inner cylinder in sewage sludge feed storehouse, it is ensured that be anoxybiotic environment in inner cylinder, thus can realize dirt
The pyrolysis charring of mud and the generation for preventing dioxin；(2) highly-safe, when the oxygen content that oxygen content detector is shown is more than to set
When definite value, nitrogen inlet can automatically open and supplement nitrogen into wicket cover, thus not only it is possible to prevente effectively from wicket cover is sent out
Raw fire and explosive risks, can also further ensure that the intracorporal pyrolytic reaction of inner cylinder carries out under anoxybiotic environment；(3) this method can be grown
Cycle stability carries out, and system failure rate is low, for example, standing with inner cylinder and promoting sludge to discharge end by switch-plate rotation
The method of movement is compared, and can effectively solve switch-plate using the impetus of inner cylinder rotation and helical blade in the present invention
It is interfered with inner cylinder and the rotation axis of switch-plate deforms at high temperature and then leads to the phenomenon that stopping work；(4) party
Method drives inner cylinder rotation using turning motor and outer barrel is opposing stationary, can further decrease the pressure load of turning motor
And power energy consumption；(5) this method may be implemented the continuous treatment of sludge and recycle CO, CH in sludge4Equal gases simultaneously obtain
Charcoal, wherein charcoal charcoal can be used for nursery stock foster, afforestation, air cleaning processing absorption, building auxiliary material it is auxiliary
Material etc., to realize the resource utilization of sludge.
In some embodiments of the invention, in step (1), the filling rate of the inner cylinder is 10~25%, preferably 15
~20%, the oxygen content in the wicket cover is not higher than 3v ‰.
In some embodiments of the invention, the method for continuous processing municipal sludge further comprises: (3) are by the pyrolysis
Gas, which is supplied into the burner, to burn, to provide thermal energy using the pyrolysis gas for the pyrolysis processing.Thus
Can use pyrolysis gas burning is that pyrolyzing sludge handles heat supply, and then reduces the dependence of the system external portion energy.
In some embodiments of the invention, purified treatment is carried out to the pyrolysis gas before carrying out step (3).Thus
It can be further improved the quality and efficiency of combustion of pyrolysis gas.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the system structure diagram of continuous processing municipal sludge according to an embodiment of the invention.
Fig. 2 is that the system of continuous processing municipal sludge according to an embodiment of the invention is illustrated along the section in the direction A-A
Figure.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
According to the first aspect of the invention, the invention proposes a kind of systems of continuous processing municipal sludge.According to this
The embodiment of invention, as shown in Figure 1, the system includes: feeding device 100, pyrolysis installation 200, wicket cover 300 and turning motor
400。
It is described in detail below with reference to system of the Fig. 1-2 to the continuous processing municipal sludge of the above embodiment of the present invention.
Feeding device 100
According to an embodiment of the invention, feeding device 100 includes sewage sludge feed storehouse 110 and feed screw 120.The present invention
It is middle that material envelope may be implemented using the feeding device, though the material position kept certain height in sewage sludge feed storehouse, and then avoid to heat
Air is brought into inner cylinder when being fed in solution device.
A specific embodiment according to the present invention, present invention is generally directed to municipal sludges, further, sludge it is aqueous
Rate can be 20~30wt%.
Pyrolysis installation 200
According to an embodiment of the invention, pyrolysis installation 200 includes inner cylinder 210 and outer barrel 220, inner cylinder 210 can revolve
Turn setting, and 210 inner wall of inner cylinder is equipped with helical blade 211, the feed end 212 of feed screw 120 and inner cylinder 210
It is connected；Outer barrel 220 is set on inner cylinder 210, and sealing cavity 230 is formed between outer barrel 220 and inner cylinder 210,
Outer barrel 220 is equipped with high-temperature medium entrance 221 and heat transferring medium outlet 222.It is possible thereby to using high-temperature medium to sludge into
Row indirect heating, and then realize the pyrolysis processing of sludge.
A specific embodiment according to the present invention, feed screw 120 extend into the inside of inner cylinder 210 120~
150mm, such as can be 120mm, 135mm, 150mm, it is possible thereby to avoid sludge that buildup phenomenon occurs in inner cylinder end.
Another specific embodiment according to the present invention, the filling rate of sludge can be 10~25% in inner cylinder 210, example
It such as can be 10%, 13%, 16%, 19%, 22% or 25%, inventors have found that if the filling rate of sludge is excessive in inner cylinder,
It is easy to cause pyrolyzing sludge insufficient, and the too small efficiency that can seriously affect pyrolysis processing of filling rate, passes through control in the present invention
The filling rate of sludge is 10~25% in inner cylinder processed, can not only sludge be made sufficiently to be pyrolyzed, can also significantly improve sludge hot
Solve the efficiency of processing.Preferably, the filling rate of sludge can be 15~20% in inner cylinder 210, it is possible thereby to further ensure that
Sludge is sufficiently pyrolyzed, to further increase the yield and quality of pyrolysis gas and charcoal.
Another specific embodiment according to the present invention, residence time of the sludge in inner cylinder 210 can be 30~50
Minute, the temperature for carrying out pyrolysis processing can be 450~500 degrees Celsius, inventors have found that sludge carries out the time of pyrolysis processing
Too short or temperature is too low, and to will lead to pyrolyzing sludge insufficient, and the overlong time of pyrolysis processing can reduce the efficiency of pyrolysis processing
And energy consumption is dramatically increased, and the excessively high increase for also resulting in energy consumption of temperature of pyrolysis processing, it is above-mentioned by controlling in the present invention
Pyrolysis processing condition not only can be further improved the efficiency and effect of pyrolysis processing, can also further increase the utilization of the energy
Rate.
Another specific embodiment according to the present invention can be equipped with refractory brick on the inner wall of outer barrel 220, thus not only
The thermal loss of high-temperature medium can be reduced, while being also avoided that sealing cavity medium temperature spends high damage outer barrel, plays protection
The effect of outer barrel.Further, outer barrel 220 and 210 contact position of inner cylinder can be equipped with flexible sealing structure, such as should
Flexible sealing structure can select graphite flake compound with sheet metal and be fixed using traction rope, the flexible sealing used in the present invention
Structure can not only adapt to hot environment, it may also be ensured that the sealing effect of its variable working condition under high temperature environment, avoids inner cylinder
Sealed sandwich gas leakage when relative to outer barrel rotation makes temperature with higher and suitable pressure environment in sealing cavity, really
Protecting pyrolysis processing smoothly can efficiently carry out.
Another specific embodiment according to the present invention, high-temperature medium entrance 221 can be located at 220 lower part of outer barrel and face
The discharge end 213 of nearly inner cylinder 210, heat transferring medium outlet 222 can be located at 220 lower part of outer barrel and close on inner cylinder 210
Feed end 212, it is possible thereby to further increase the energy utilization rate of high-temperature medium.
The temperature of another specific embodiment according to the present invention, high-temperature medium can be 850-950 DEG C, and high-temperature medium is
When high-temperature flue gas, the pressure of 220 high temperature medium of outer barrel can be tiny structure, and it is upper for passing through control high-temperature medium in the present invention
Condition is stated, not only may insure that there is uniform and stable hot environment in Sealed sandwich, can also further increase to inner cylinder
Heat transfer effect, so that the intracorporal temperature of inner cylinder is may remain in 450~500 degrees Celsius, it is possible thereby to further increase to dirt
The efficiency and effect of mud progress pyrolysis processing.
Another specific embodiment according to the present invention, outer barrel 220 can be equipped with the second temperature measuring equipment and pressure measuring unit,
It is possible thereby to further be conducive to control the temperature and pressure of high-temperature medium in outer barrel, to further increase to inner cylinder
Heat transfer effect simultaneously indirectly controls the intracorporal pyrolysis temperature of inner cylinder, it is ensured that the efficiency and effect of pyrolysis processing are carried out to sludge.
Another specific embodiment according to the present invention, inner cylinder 210 and the horizontal coaxial arrangement of outer barrel 220.
Another specific embodiment according to the present invention, the system of continuous processing municipal sludge may further include burning
Device (not shown), burner can have fuel gas inlet and high-temperature flue gas outlet, and fuel gas inlet can be with pyrolysis gas outlet
350 are connected, and high-temperature flue gas outlet can be connected with high-temperature medium entrance 221.It is possible thereby to the pyrolysis obtained using pyrolyzing sludge
Gas is that pyrolyzing sludge handles heat supply, and then reduces the dependence of the system external portion energy.Further, the fuel gas inlet of burner
Also it is connected with municipal gas outlet, can use municipal combustion gas before generating stable pyrolysis gas thus as pyrolysis processing confession
Heat, if also, pyrolysis gas burning deficiency think pyrolysis processing heat supply, can use pyrolysis gas and municipal combustion gas is at pyrolysis jointly
Manage heat supply.Further, the system of continuous processing municipal sludge can further include purification device (not shown), purification dress
It sets and is connected respectively with the fuel gas inlet of pyrolysis gas outlet 350 and burner, it is possible thereby to further increase the quality of pyrolysis gas
And efficiency of combustion, specifically, purification device includes connected water scrubber and drying chamber.
Wicket cover 300
According to an embodiment of the invention, wicket cover 300 is connected to the discharge end 213 of inner cylinder 210, wicket cover 300 includes
Oxygen content detector 310, the first temperature measuring equipment 320, thermal decomposition product import 330, nitrogen inlet 340,350 and of pyrolysis gas outlet
Charcoal outlet 360, nitrogen inlet 340 is automatically opened or is closed based on the display of oxygen content detector 310.Lead in the present invention
It crosses setting wicket cover and is not only more advantageous to pyrolysis gas and charcoal separation, certain buffering effect can also be played to pyrolysis gas,
And nitrogen protection can be provided for wicket cover by the way that oxygen content detector is arranged, avoided due to excess oxygen content in wicket cover
And the fire and explosive risks caused；The first temperature measuring equipment 320 is arranged can be obtained indirectly by the temperature change in monitoring wicket cover
The intracorporal temperature of inner cylinder adjusts the intracorporal pyrolysis environment of inner cylinder to be more advantageous to.
Another specific embodiment according to the present invention, the display control nitrogen inlet based on oxygen content detector 310
340 opening and closing, when the oxygen content in wicket cover 300 is higher than 3v ‰, nitrogen inlet is opened for providing nitrogen in wicket cover
Gas is to reduce oxygen content, to avoid that fire and explosive risks occurs, it is ensured that the safety of whole system.Wherein it is possible in nitrogen inlet
Nitrogen protection valve is set at 340, and nitrogen protection valve base is automatic in the display control nitrogen inlet 340 of oxygen content detector 310
Open or close.
Another specific embodiment according to the present invention, wicket cover 300 and 210 contact position of inner cylinder can be equipped with flexibility
Sealing structure, such as the flexible sealing structure can select graphite flake compound with sheet metal and be fixed using traction rope, inner cylinder
210 can be sealed with the contact position of feed screw 120 using graphite packing, and the flexible sealing structure used in the present invention is not
It only can adapt to hot environment, it may also be ensured that the sealing effect of its variable working condition under high temperature environment, effectively avoids inner cylinder phase
Outside air enters wicket cover from the interface position of wicket cover and inner cylinder when for the rotation of wicket cover, to generate detonation danger
Danger.
Another specific embodiment according to the present invention, charcoal, which exports, can be equipped with blocking valve 370 at 360.Thus will
It is possible to prevente effectively from air enters wicket cover when charcoal is delivered to exterior, avoid generating fire and explosive risks.
Turning motor 400
According to an embodiment of the invention, turning motor 400 is located at 210 feed end of inner cylinder, 212 side, turning motor 400
Output end is equipped with pinion gear, and 210 outer wall of inner cylinder is equipped with the gear wheel 214 engaged with pinion gear, and turning motor passes through small tooth
Wheel drives gear wheel 214 to rotate, and gear wheel 214 pushes inner cylinder 210 to rotate.Thus the rotation of inner cylinder 210 can not only be passed through
Turn and the impetus of helical blade 211 makes sludge to the movement of the discharge end 213 of inner cylinder 210, and only makes inner cylinder 210
Rotation also further decreases the pressure load and power energy consumption of turning motor 400, it may also be ensured that system long-period stable operation.
A specific embodiment according to the present invention, as shown in Fig. 2, being also provided with support roller on 210 outer wall of inner cylinder
215, support roller 215 drives inner cylinder 210 to rotate jointly as the driven wheel of gear wheel.Further, continuous processing municipal sludge
System automatic stopping program can be further set based on the moment variations of turning motor 400 and gear, support roller etc., prevent from endangering
Danger happens.
It should be noted that heretofore described pyrolysis oil gas can be understood as pyrolysis oil gas.
In conclusion the system of the continuous processing municipal sludge of the above embodiment of the present invention at least has the advantages that (1)
It can use feeding device 100 to supply into inner cylinder 210 sludge, be pyrolysis processing indirect heating, benefit using high-temperature medium
With turning motor 400 drive inner cylinder 210 rotation and 210 spiral inner wall blade 211 of inner cylinder impetus make sludge to
210 discharge end 213 of inner cylinder is mobile, while carrying out pyrolytic reaction；It (2) can be with by the material position in control sewage sludge feed storehouse 110
Realize the sealing to inner cylinder 210, it is ensured that be anoxybiotic environment in inner cylinder 210, thus can realize the pyrolysis charring of sludge and Du
The generation of exhausted dioxin；(3) high system safety, when the oxygen content that oxygen content detector 310 is shown is more than setting value, nitrogen
Gas import 340 can automatically open and supplement nitrogen into wicket cover 300, thus not only it is possible to prevente effectively from wicket cover 300 is sent out
Raw fire and explosive risks can also further ensure that in inner cylinder 210 as anoxybiotic environment；(4) system is reliable for operation, can be steady with long period
Fixed operation, failure rate is low, for example, standing with inner cylinder and promoting sludge to phase by way of discharging end motion switch-plate rotation
Than can effectively solve switch-plate and inner cylinder using the impetus of the rotation of inner cylinder 210 and helical blade 211 in the present invention
Body interferes and the rotation axis of switch-plate deforms at high temperature and then leads to the phenomenon that stopping work；(5) lead in the present invention
It crosses and drives the rotation of inner cylinder 210 using turning motor 400 and outer barrel 220 is opposing stationary, turning motor can be further decreased
400 pressure load and power energy consumption；(6) continuous treatment of sludge may be implemented and recycle CO, CH in sludge4Equal gases
And obtain charcoal, wherein charcoal can be used for nursery stock foster, afforestation, air cleaning processing absorption, building auxiliary material
Auxiliary material etc., to realize the resource utilization of sludge.
According to the second aspect of the invention, the invention proposes a kind of systems using above-mentioned continuous processing municipal sludge
The method for handling municipal sludge.According to an embodiment of the invention, this method comprises:
(1) sludge is supplied using feeding device and carries out pyrolysis processing into the inner cylinder of pyrolysis installation, wherein utilize height
Warm medium provides heat source for pyrolysis processing, pushes inner cylinder to rotate using turning motor, rotation and spiral shell of the sludge by inner cylinder
Discharging end motion of the promotion of vane piece to inner cylinder, while carrying out pyrolytic reaction；
(2) thermal decomposition product that step (1) obtains is supplied into wicket cover and carries out solid gas separation, to respectively obtain pyrolysis
Gas and charcoal, wherein the opening and closing of the display control nitrogen inlet based on oxygen content detector, to control wicket
Oxygen content in cover.
A specific embodiment according to the present invention, the source of sludge is not particularly restricted in the present invention, this field skill
Art personnel can select according to actual needs.For example, sludge can be municipal sludge etc..Further, sludge is aqueous
Rate can be 25~50wt%, such as can be 25~35wt% or 25~30wt%, and material envelope effect not only can be improved as a result,
Fruit can also significantly improve the subsequent efficiency that pyrolysis processing is carried out to sludge.
A specific embodiment according to the present invention, in step (1), the filling rate of inner cylinder can be 10~25%, example
It such as can be 10%, 13%, 16%, 19%, 22% or 25%, inventors have found that if the filling rate of sludge is excessive in inner cylinder,
It is easy to cause pyrolyzing sludge insufficient, and the too small efficiency that can seriously affect pyrolysis processing of filling rate, passes through control in the present invention
The filling rate of sludge is 10~25% in inner cylinder processed, can not only sludge be made sufficiently to be pyrolyzed, can also significantly improve sludge hot
Solve the efficiency of processing.Preferably, the filling rate of sludge can be 15~20% in inner cylinder 210, it is possible thereby to further ensure that
Sludge is sufficiently pyrolyzed, to further increase the yield and quality of pyrolysis gas and charcoal.
Another specific embodiment according to the present invention, the oxygen content in wicket cover is not higher than 3v ‰, it is possible thereby to effectively
It avoids that fire and explosive risks occurs, it is ensured that the safety of whole system.
Another specific embodiment according to the present invention, the time for carrying out pyrolysis processing can be 30~50 minutes, temperature
It can be 450~500 degrees Celsius, inventors have found that the time that sludge carries out pyrolysis processing is too short or temperature is too low will lead to
Pyrolyzing sludge is insufficient, and the overlong time of pyrolysis processing can reduce the efficiency of pyrolysis processing and dramatically increase energy consumption, and is pyrolyzed
The excessively high increase for also resulting in energy consumption of the temperature of processing, not only can be by controlling above-mentioned pyrolysis processing condition in the present invention
One step improves the efficiency and effect of pyrolysis processing, can also further increase the utilization rate of the energy.
The temperature of another specific embodiment according to the present invention, high-temperature medium can be 850-950 DEG C, and high-temperature medium is
When high-temperature flue gas, the pressure of 220 high temperature medium of outer barrel can be tiny structure, and it is upper for passing through control high-temperature medium in the present invention
Condition is stated, not only may insure that there is uniform and stable hot environment in Sealed sandwich, can also further increase to inner cylinder
Heat transfer effect, so that the intracorporal temperature of inner cylinder is may remain in 450~500 degrees Celsius, it is possible thereby to further increase to dirt
The efficiency and effect of mud progress pyrolysis processing.
Another specific embodiment according to the present invention, the method for continuous processing municipal sludge may further include: (3)
Pyrolysis gas is supplied and is burnt into burner, to provide thermal energy using pyrolysis gas for pyrolysis processing.It is possible thereby to sharp
It is pyrolyzing sludge processing heat supply with the pyrolysis gas that pyrolyzing sludge generates, and then reduces the dependence of the system external portion energy.Further
Ground can carry out purified treatment to pyrolysis gas before carrying out step (3), such as can successively pyrolysis gas be washed and be done
Dry processing, it is possible thereby to further increase the quality and efficiency of combustion of pyrolysis gas.
The method of continuous processing municipal sludge according to the above embodiment of the present invention at least has the advantages that (1) can be with
The sealing to inner cylinder is realized by the material position in control sewage sludge feed storehouse, it is ensured that it is anoxybiotic environment in inner cylinder, it thus can be real
The pyrolysis charring of existing sludge and the generation for preventing dioxin；(2) highly-safe, when the oxygen content that oxygen content detector is shown is super
When crossing setting value, nitrogen inlet can automatically open and supplement nitrogen into wicket cover, thus not only it is possible to prevente effectively from wicket
Fire and explosive risks occurs for cover, can also further ensure that the intracorporal pyrolytic reaction of inner cylinder carries out under anoxybiotic environment；(3) this method can
Stablized with long period and carried out, and system failure rate is low, for example, being stood with inner cylinder and promoting sludge to out by switch-plate rotation
The method of material end motion is compared, and can effectively solve to dial using the impetus of inner cylinder rotation and helical blade in the present invention
Flitch and inner cylinder interfere and the rotation axis of switch-plate deforms at high temperature and then lead to the phenomenon that stopping work；(4)
This method drives inner cylinder rotation using turning motor and outer barrel is opposing stationary, can further decrease the pressure of turning motor
Load and power energy consumption；(5) this method may be implemented the continuous treatment of sludge and recycle CO, CH in sludge4Equal gases are simultaneously
Obtain charcoal, wherein charcoal can be used for nursery stock foster, afforestation, the absorption of air cleaning processing, building auxiliary material
Auxiliary material etc., to realize the resource utilization of sludge.
It should be noted that feature described in the above-mentioned system for continuous processing municipal sludge and effect are for being applicable in
In the method for the continuous processing municipal sludge, details are not described herein again.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in a or multiple embodiment or examples.In addition, without conflicting with each other, the technology of this field
The feature of different embodiments or examples described in this specification and different embodiments or examples can be combined by personnel
And combination.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of system of continous way processing municipal sludge characterized by comprising
Feeding device, the feeding device include sewage sludge feed storehouse and feed screw；
Pyrolysis installation, the pyrolysis installation include:
Inner cylinder, the rotatable setting of inner cylinder, and the inner cylinder inner wall are equipped with helical blade, the spiral charging
Machine is connected with the feed end of the inner cylinder；
Outer barrel, the outer barrel are set on the inner cylinder, and are formed between the outer barrel and the inner cylinder close
Cavity is sealed, the outer barrel is equipped with high-temperature medium entrance and heat transferring medium exports；
Wicket cover, the wicket cover are connected to the discharge end of the inner cylinder, and the wicket cover includes oxygen content detector,
One temperature measuring equipment, thermal decomposition product import, nitrogen inlet, pyrolysis gas outlet and charcoal outlet, the nitrogen inlet are based on described
The display of oxygen content detector is automatically opened or is closed；
Turning motor, the turning motor are located at inner cylinder feed end side, and the turning motor output end is equipped with small tooth
Wheel, the inner cylinder outer wall are equipped with the gear wheel engaged with pinion gear, and the turning motor is driven described big by pinion gear
Gear rotation, the gear wheel push the inner cylinder rotation.
2. system according to claim 1, which is characterized in that further comprise:
Burner, the burner have fuel gas inlet and high-temperature flue gas outlet, the fuel gas inlet and the pyrolysis gas
Outlet is connected, and the high-temperature flue gas outlet is connected with the high-temperature medium entrance.
3. system according to claim 2, which is characterized in that further comprise:
Purification device, the purification device are connected with the pyrolysis gas outlet and the fuel gas inlet respectively.
4. system according to claim 1, which is characterized in that the outer barrel inner wall is equipped with refractory brick, and described
Outer barrel and the inner cylinder contact position are equipped with flexible sealing structure.
5. system according to claim 1, which is characterized in that the feed screw is extend into inside the inner cylinder
120~150mm.
6. system according to claim 1, which is characterized in that the wicket cover is equipped with soft with the inner cylinder contact position
Property sealing structure, the contact position of the inner cylinder and the feed screw is using graphite packing sealing.
7. system according to claim 1, which is characterized in that the charcoal exit is equipped with blocking valve.
8. a kind of method using system continuous processing municipal sludge of any of claims 1-7, which is characterized in that
Include:
(1) sludge is supplied using the feeding device and carries out pyrolysis processing into the inner cylinder of the pyrolysis installation, wherein benefit
Heat source is provided for the pyrolysis processing with high-temperature medium, pushes the inner cylinder to rotate using the turning motor, the sludge
Discharging end motion by the rotation of the inner cylinder and from the promotion of the helical blade to the inner cylinder, while being pyrolyzed
Reaction；
(2) thermal decomposition product that step (1) obtains is supplied into the wicket cover and carries out solid gas separation, to respectively obtain pyrolysis
Gas and charcoal, wherein the opening and closing of nitrogen inlet described in the display control based on the oxygen content detector, so as to
Control the oxygen content in the wicket cover.
9. according to the method described in claim 8, it is characterized in that, in step (1), the filling rate of the inner cylinder is 10~
25%, preferably 15~20%, the oxygen content in the wicket cover is not higher than 3v ‰.
10. method according to claim 7 or 8, which is characterized in that further comprise:
(3) pyrolysis gas is supplied into the burner and is burnt, to be the pyrolysis using the pyrolysis gas
Processing provides thermal energy, it is preferable that carries out purified treatment to the pyrolysis gas before carrying out step (3).
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