CN106196992A - The water vapour that refuse pyrolysis produces is used for the system and method for garbage drying after heating up - Google Patents
The water vapour that refuse pyrolysis produces is used for the system and method for garbage drying after heating up Download PDFInfo
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- CN106196992A CN106196992A CN201610701853.7A CN201610701853A CN106196992A CN 106196992 A CN106196992 A CN 106196992A CN 201610701853 A CN201610701853 A CN 201610701853A CN 106196992 A CN106196992 A CN 106196992A
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- China
- Prior art keywords
- dry section
- water vapour
- gas outlet
- furnace
- garbage
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/18—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with moving charge
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/04—Garbage
Abstract
The present invention relates to after the water vapour that refuse pyrolysis produces heats up for the system and method for garbage drying.The system of the present invention includes rotary hearth furnace, blower fan, heating furnace, drying garbage device, rotary hearth furnace has rotating ring-shaped furnace bottom, for placing rubbish, its upper furnace is provided with radial canal, rotary hearth furnace has feed zone, dry section, pyrolysis zone, discharge zone successively, is respectively arranged with baffle plate between dry section and feed zone, pyrolysis zone；The gas outlet connecting fan air inlet of dry section, blower fan gas outlet connects heating furnace air inlet, and heating furnace gas outlet connects the air inlet of drying garbage device, and the garbage outlet of drying garbage device connects feed zone.The present invention can effectively utilize the high-purity water steam produced in garbage processing procedure, it is achieved the recycling of resource.
Description
Technical field
The present invention relates to solid waste resource recovery process field, particularly relate to one and utilize water in refuse pyrolysis rotary hearth furnace
After Steam Recovery pyrolytic carbon waste heat, carry out the system and method for drying garbage.
Background technology
Along with China's rapid development of economy, urbanization process speed is constantly accelerated, and living standards of the people improve constantly, Gu
The yield of body garbage, particularly domestic waste is also being continuously increased, and environment causes serious pollution.Sustainable
Under the influence of idea of development, solid waste is innoxious, minimizing and the exploitation application of resource treatment technique and industrialization, will
A wide prospect can be faced.Therefore, solid waste treating technology research has become after waste water, exhaust-gas treatment research
Another study hotspot.Wherein, solid waste resource recovery processes and refers to use management and technological measure from solid waste
Reclaim material and the energy, the circulation of matter and energy can be accelerated, create certain economic worth.
Refuse pyrolysis method refers to, under conditions of anaerobic or anoxia, utilize the thermal instability of organic matter in garbage, to it
Carry out adding thermal distillation, make Organic substance crack, the various new gases of condensed rear formation, liquid and solid, more therefrom extract
Fuel oil, combustible gas etc..
Relating to the rotary hearth furnace of a kind of radiant tube isolated smoke gas heating in prior art, rotary hearth furnace is loop configuration, body of heater
Being formed with fixing furnace wall, furnace roof by the bottom of rotary furnace, furnace bottom is rotated by furnace bottom machine, and heated bulk material is laid in stove
, material rotates with furnace bottom, and remains static relative to furnace bottom, and the process forwarding discharging opening from charging door to completes to add at the end
Thermally and chemically react.It is provided with some radiation tube heaters in burner hearth, with radiation mode, the material in stove is heated.
When using above-mentioned rotary hearth furnace that rubbish is carried out pyrolysis processing, rubbish rotates with furnace bottom in stove, is gradually heated up heating up
Complete to be dried, pyrolytic process.Accordingly, rotary hearth furnace can be divided into feed zone, dry section, pyrolysis zone, discharge zone.In dry section,
In rubbish, moisture is evaporated, and forms water vapour, simultaneously because radial canal temperature is higher, has a small amount of rubbish and be pyrolyzed, and is formed
Combustible pyrolysis's gas.Generally, the pyrolysis gas being dried the water vapour formed and refuse pyrolysis formation can be sent to gas-liquid together
Piece-rate system carries out gas-liquid separation, and water vapour is condensed into aqueous water.In the process, dry section generate water vapour not by
Effectively utilize, and this water vapour amount is big, about the 30%～50% of rubbish quality, causes waste greatly.
Summary of the invention
It is contemplated that realize refuse pyrolysis in rotary hearth furnace is produced effective utilization of water vapour, steam heating is heated up
After, being dried for garbage raw material.The present invention can control the content of combustible gas in the water vapour that rotary hearth furnace generates, it is to avoid water vapour
The waste of middle heat, high financial profit, it is advantageously implemented industrial applications.
For achieving the above object, for garbage drying after the present invention proposes the water vapour intensification that a kind of refuse pyrolysis produces
System, described system includes rotary hearth furnace, blower fan, heating furnace, drying garbage device；
Described rotary hearth furnace has rotating ring-shaped furnace bottom, is used for placing described rubbish；Described rotary hearth furnace upper furnace sets
It is equipped with radial canal；
Described rotary hearth furnace has feed zone, dry section, pyrolysis zone, discharge zone successively；Described feed zone and described dry section
Between be provided with baffle plate；It is provided with baffle plate between described dry section and described pyrolysis zone；
Described dry section has gas outlet；
Described blower fan has fan air inlet and blower fan gas outlet；Described fan air inlet connects giving vent to anger of described dry section
Mouthful；
Described heating furnace has air inlet and gas outlet, and this air inlet connects the gas outlet of described blower fan；
Described drying garbage device has air inlet, and this air inlet connects the gas outlet of described heating furnace；
Described drying garbage device has garbage outlet, and this garbage outlet connects described feed zone.
Further, described rotary hearth furnace, drying garbage device, the regional of blower fan are provided with multiple air inlet or give vent to anger
Mouthful；Described blower fan is two or more.
Further, described heating furnace is indirect heater；Described drying garbage device is roller dryer.
Further, temperature instrument and combustible gas composition detection instrument it are provided with at the gas outlet of described dry section.
Further, described dry section is provided with rubbish turning device and multiple stage pressure instrumentation.
Another object of the present invention proposes a kind of method utilizing said system to carry out garbage drying, comprises the following steps:
Step A, is drawn to described by water vapour in described rotary hearth furnace by described blower fan via the gas outlet of described dry section
The air inlet of heating furnace, carries out heat temperature raising, water vapour after being heated up in described heating furnace；
Step B, is transported to described drying garbage device by water vapour after described intensification, by the temperature of water vapour after described intensification
Garbage raw material in described drying garbage device is dried by degree, obtains predrying rear rubbish.
In the method for above-mentioned garbage drying, further comprised the steps of: before step A and the rubbish through pre-dried is transported to
Described rotary hearth furnace, is placed on described rotating ring-shaped furnace bottom, generates described water vapour under the effect of described radial canal.
In the method for above-mentioned garbage drying, described radial canal uses the mode of indirec radiation heating.
In the method for above-mentioned garbage drying, the pressure of described dry section is set as higher than the pressure of described feed zone 5～
20Pa；
The pressure of described dry section is set as higher than the pressure of described pyrolysis zone 5～20Pa.
In the method for above-mentioned garbage drying, steam temperature described at the gas outlet of described dry section is controlled be 120～
400 DEG C, and the content of wherein combustible gas is controlled for account for total water vapour≤1wt%；
After described intensification, the temperature of water vapour controls is 450～900 DEG C.
In the present invention, rotary hearth furnace use the mode that radial canal heats indirectly rubbish is dried, pyrolysis processing, logical
Cross temperature and the pressure in each region of rotary hearth furnace controlling radial canal, and rubbish is overturn, can be prevented effectively from dry section
Interior refuse pyrolysis generates combustible gas, thus ensures the high-purity of the interior water vapour produced of rotary hearth furnace.
After processing the steam heating that rubbish process produces, can be directly used for garbage raw material is dried, it is achieved that rubbish
The recycling treatment of rubbish.
Accompanying drawing explanation
Fig. 1 is to show for the system structure of garbage drying after the water vapour that in the embodiment of the present invention, refuse pyrolysis produces heats up
It is intended to.
Fig. 2 is the structural representation of rotary hearth furnace in the embodiment of the present invention.
Fig. 3 is to show for the method flow of garbage drying after the water vapour that in the embodiment of the present invention, refuse pyrolysis produces heats up
It is intended to.
Reference in accompanying drawing is as follows:
I, rotary hearth furnace；II, blower fan；III, indirect heater；IV, drying garbage device；
1, feed zone；2, dry section；3, pyrolysis zone；4, discharge zone；
5, gas outlet；6, gas outlet；7, gas outlet.
Detailed description of the invention
Below in conjunction with drawings and Examples, the detailed description of the invention of the present invention is described in more details, in order to energy
The advantage being enough more fully understood that the solution of the present invention and its various aspects.But, specific embodiments described below and reality
Executing example is only descriptive purpose rather than limitation of the present invention.
As it is shown in figure 1, for be used for garbage drying after the water vapour of refuse pyrolysis generation heats up in the embodiment of the present invention be
System structural representation.Figure includes rotary hearth furnace I, blower fan II, indirect heater III, drying garbage device IV.
As in figure 2 it is shown, be the structural representation of above-mentioned rotary hearth furnace I, this rotary hearth furnace have successively feed zone 1, dry section 2,
Pyrolysis zone 3, discharge zone 4.
Seeing that Fig. 2, above-mentioned dry section 2 have gas outlet 5, above-mentioned pyrolysis zone 3 has gas outlet 6 and gas outlet 7.
Above-mentioned blower fan II includes blower fan 1 and blower fan 2, and all has air inlet and gas outlet, wherein the air inlet of blower fan 1 with
The gas outlet 5 of dry section 2 connects.
Indirect heater III has air inlet and gas outlet, giving vent to anger of the air inlet connecting fan 1 of this indirect heater III
Mouthful.
Drying garbage device IV has air inlet, and this air inlet is connected with the gas outlet of indirect heater III.
Drying garbage device IV also has garbage outlet, and this garbage outlet connects the feed zone 1 of rotary hearth furnace I.
The body of heater of rotary hearth furnace I includes annular furnace wall, annular furnace roof, rotating ring-shaped furnace bottom, wherein, in garbage disposal
Cheng Zhong, is placed on rubbish on rotating ring-shaped furnace bottom.
The upper space of rotary hearth furnace I burner hearth is provided with radial canal.
Dry section 2 is provided with rubbish turning device, is provided with temperature instrument at gas outlet 5 and becomes go-on-go with combustible gas
Survey instrument.
The gas outlet 5 of dry section 2 is connected with the air inlet of blower fan 1, feed zone 1, pyrolysis zone 3, one of discharge zone 4 or many
Individual gas outlet is connected with the air inlet of blower fan 2.
Dry section 2 and the boundary a of feed zone 1 are provided with baffle plate a, dry section 2 is provided with the boundary b of pyrolysis zone 3
Baffle plate b.The equal ＜ of vertical dimension 100 between rubbish on baffle plate a and baffle plate b and rotating ring-shaped furnace bottom.
In dry section 1, it is additionally provided with multiple stage pressure instrumentation at boundary a and boundary b, is used for detecting boundary
A and the pressure of boundary b.
Drying garbage device IV in the embodiment of the present invention uses roller dryer.
As it is shown on figure 3, be for the side of garbage drying after the water vapour that in the embodiment of the present invention, refuse pyrolysis produces heats up
Method schematic flow sheet, comprises the steps:
A, rubbish pretreatment: be first transported in roller dryer by garbage raw material, utilize water vapour to rubbish therein
Rubbish raw material is dried, and reduces the moisture content of garbage raw material, obtains the rubbish through pre-dried.
B, refuse pyrolysis produce water vapour: by feed zone 1, the rubbish through pre-dried is transported to dry section successively
2, in pyrolysis zone 3, it is placed on rotating ring-shaped furnace bottom and carries out pyrolysis processing, produce water vapour and pyrolytic carbon.Wherein, pyrolysis
Charcoal is transported in drawing mechanism store by the discharge zone 4 of rotary hearth furnace I.
The refuse pyrolysis of embodiment of the present invention indication processes and includes two processes: dry run and pyrolytic process.Wherein, on
Stating the product that water vapour is dry run, pyrolytic carbon is the product of pyrolytic process.
Rubbish on furnace bottom can be overturn by rubbish turning device, it is ensured that rubbish is heated evenly, it is to avoid hot-spot is made
Become refuse pyrolysis to generate a large amount of combustible gases, thus effectively control the content of combustible gas composition in water vapour.
The process of the pyrolysis processing rubbish in the present invention is provided heat by radial canal, uses the side of indirec radiation heating
Formula so that pyrolysis atmosphere and combustion heating atmosphere in rotary hearth furnace I fully completely cut off, thus the high-purity of water vapour is effectively ensured.
Baffle plate a can prevent gas in feed zone 1 from flowing in dry section 2, and what baffle plate b can prevent from producing in pyrolysis zone 3 can
Combustion gas flows in dry section 2, thus ensures the anoxybiotic atmosphere in dry section 2.
Pressure instrumentation is for detecting pressure differential P1 and pressure differential P2 of boundary b of boundary a.As P1 ＜ 5Pa
Time, by regulation blower fan 1, maintain the pressure high 5～20Pa of the pressure ratio feed zone 1 of dry section 2；As P2 ＜ 5Pa, by adjusting
Joint blower fan 1 and blower fan 2, reduce the pressure of pyrolysis zone 3, maintains the pressure high 5～20Pa of the pressure ratio pyrolysis zone 3 of dry section 2.
Temperature instrument, for detecting the temperature of water vapour at QI KOU 5, is come by the heating efficiency controlling radial canal
Ensure that the temperature of water vapour maintains between 120～400 DEG C.
Combustible gas composition detection instrument is for detecting the content of combustible gas at QI KOU 5, flammable when detecting in water vapour
During content ＞ 1wt% (wt% is mass percent) of gas, blower fan 1 quits work.Meanwhile, make the gas in dry section 2 the most logical
Cross blower fan 2 and extract rotary hearth furnace I out via other gas outlet beyond gas outlet 5.Thus, it is ensured that the water vapour produced in dry section 2
High-purity.
C, water vapour heat up: the water vapour produced in dry section 2, by blower fan 1, is drawn to indirectly heat via gas outlet 5
At the air inlet of stove III, enter in indirect heater III.Water vapour is heated up in indirect heater III, the temperature of water vapour
Degree can rise to 450～900 DEG C.
D, garbage drying: will heat up rear water vapour and be transported to drying garbage device IV by the gas outlet of indirect heater III
In (i.e. roller dryer).
Utilize the temperature of water vapour after heating up, the garbage raw material in roller dryer is dried, garbage raw material
Moisture content reduces, thus obtains predrying rear rubbish.Then predrying rear rubbish is transported back and proceed step to rotary hearth furnace I
Process described in B.
Embodiment 1
Use moisture content be the rubbish of 45wt% as the garbage raw material in this embodiment, treating capacity be 100t/d (ton/
My god).
First the garbage raw material that moisture content is 45wt% is transported to roller dryer, carries in roller dryer
The water vapour of 180～230 DEG C, carries out pre-dried to rubbish therein, by predrying extremely for the rubbish that moisture content is 45wt%
Moisture content is 30wt%, and the consumption of water vapour is 20t/d.
Carry out pyrolysis processing in being transported to rotary hearth furnace through the rubbish of pre-dried, maintain the pressure ratio charging of dry section
District, pyrolysis zone pressure high 5Pa respectively, at dry section gas outlet, steam temperature is 120～180 DEG C.By produce in rotary hearth furnace
Water vapour is transported in indirect heater, is warming up to 450 DEG C, will heat up rear water vapour and is transported in roller dryer carry out rubbish
Rubbish dried.
Embodiment 2
Step in the present embodiment, with embodiment 1, maintains the pressure ratio feed zone of dry section, pyrolysis zone pressure height respectively
10Pa, at dry section gas outlet, steam temperature is 180～230 DEG C, steam temperature 800 DEG C after intensification, and other each conditions are same
Embodiment 1.
Embodiment 3
Step in the present embodiment, with embodiment 1, maintains the pressure ratio feed zone of dry section, pyrolysis zone pressure height respectively
20Pa, at dry section gas outlet, steam temperature is 230～400 DEG C, steam temperature 900 DEG C after intensification, and other each conditions are same
Embodiment 1.
Variation
Detailed description of the invention based on the present invention and embodiment also can expand out many variation, such as:
The body of heater of rotary hearth furnace can be other outside division ring shape may make up rotary hearth furnace at the bottom of furnace wall, furnace roof, rotatable stove
Shape, furnace bottom can use arbitrary rotating manner.
Radial canal may be provided on other position of rotary hearth furnace, but can use in not affecting its heating function, or rotary hearth furnace
Other type of mode of heating.
In rotary hearth furnace, the order of connection of each subregion can be that other do not affect the order that rotary hearth furnace works, or the quantity of subregion can
It is decreased or increased, each region can arrange any number of air inlet or gas outlet.
Temperature instrument, combustible gas composition detection instrument, baffle plate, pressure instrumentation, the quantity of blower fan are not limited
System.
Drying garbage device can be that other is applicable to the device having functions/drying that this rotary hearth furnace works.
It is last that it is noted that obviously above-described embodiment is only for clearly demonstrating example of the present invention, and also
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-form.Here without also cannot all of embodiment be given exhaustive.And thus drawn
What Shen went out obviously changes or changes among still in protection scope of the present invention.
Claims (10)
1. for the system of garbage drying after the water vapour of a refuse pyrolysis generation heats up, it is characterised in that described system bag
Include rotary hearth furnace, blower fan, heating furnace, drying garbage device；
Described rotary hearth furnace has rotating ring-shaped furnace bottom, is used for placing described rubbish；Described rotary hearth furnace upper furnace is provided with
Radial canal；
Described rotary hearth furnace has feed zone, dry section, pyrolysis zone, discharge zone successively；Between described feed zone and described dry section
It is provided with baffle plate；It is provided with baffle plate between described dry section and described pyrolysis zone；
Described dry section has gas outlet；
Described blower fan has fan air inlet and blower fan gas outlet；Described fan air inlet connects the gas outlet of described dry section；
Described heating furnace has air inlet and gas outlet, and this air inlet connects the gas outlet of described blower fan；
Described drying garbage device has air inlet, and this air inlet connects the gas outlet of described heating furnace；
Described drying garbage device has garbage outlet, and this garbage outlet connects described feed zone.
System the most according to claim 1, it is characterised in that described rotary hearth furnace, drying garbage device, each district of blower fan
Territory is provided with multiple air inlet or gas outlet；Described blower fan is two or more.
System the most according to claim 1, it is characterised in that
Described heating furnace is indirect heater；
Described drying garbage device is roller dryer.
System the most according to claim 1, it is characterised in that be provided with temperature instrument at the gas outlet of described dry section
With combustible gas composition detection instrument.
System the most according to claim 1, it is characterised in that be provided with rubbish turning device and multiple stage pressure in described dry section
Power instrumentation.
6. the method that the system utilizing one of claim 1 to 5 described carrys out garbage drying, comprises the following steps:
Step A, is drawn to described heating by described blower fan via the gas outlet of described dry section by water vapour in described rotary hearth furnace
The air inlet of stove, carries out heat temperature raising, water vapour after being heated up in described heating furnace；
Step B, is transported to described drying garbage device by water vapour after described intensification, by the temperature pair of water vapour after described intensification
Garbage raw material in described drying garbage device is dried, and obtains predrying rear rubbish.
Method the most according to claim 6, it is characterised in that further comprised the steps of: through pre-dried before step A
Rubbish be transported to described rotary hearth furnace, be placed on described rotating ring-shaped furnace bottom, under the effect of described radial canal generate
Described water vapour.
Method the most according to claim 7, it is characterised in that described radial canal uses the side of indirec radiation heating
Formula.
Method the most according to claim 6, it is characterised in that
The pressure of described dry section is set as higher than the pressure of described feed zone 5～20Pa；
The pressure of described dry section is set as higher than the pressure of described pyrolysis zone 5～20Pa.
Method the most according to claim 6, it is characterised in that by water vapour temperature described at the gas outlet of described dry section
Degree control is 120～400 DEG C, and the content of wherein combustible gas is controlled for account for total water vapour≤1wt%；
After described intensification, the temperature of water vapour controls is 450～900 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701853.7A CN106196992A (en) | 2016-08-22 | 2016-08-22 | The water vapour that refuse pyrolysis produces is used for the system and method for garbage drying after heating up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701853.7A CN106196992A (en) | 2016-08-22 | 2016-08-22 | The water vapour that refuse pyrolysis produces is used for the system and method for garbage drying after heating up |
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| CN106196992A true CN106196992A (en) | 2016-12-07 |
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ID=57524206
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| JP2003279015A (en) * | 2002-03-26 | 2003-10-02 | Mitsui Eng & Shipbuild Co Ltd | Biomass thermally-decomposed gas combusting method |
| CN200968766Y (en) * | 2006-10-30 | 2007-10-31 | 四川雷鸣生物环保工程有限公司 | High-temperature circulating flue gas agitating drying machines |
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Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Applicant after: Shenwu science and technology group Limited by Share Ltd Address before: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Applicant before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |
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Application publication date: 20161207 |