CN108036307A - A kind of roller conveying type destructive distillation circulating fluidized bed boiler - Google Patents
A kind of roller conveying type destructive distillation circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN108036307A CN108036307A CN201711343120.1A CN201711343120A CN108036307A CN 108036307 A CN108036307 A CN 108036307A CN 201711343120 A CN201711343120 A CN 201711343120A CN 108036307 A CN108036307 A CN 108036307A
- Authority
- CN
- China
- Prior art keywords
- destructive distillation
- lignite
- fluidized bed
- circulating fluidized
- bed boiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
Abstract
The present invention provides a kind of destructive distillation circulating fluidized bed boiler.Including burner hearth, pot and separator, destructive distillation cylinder is set between separator and burner hearth, the returning charge ash of separator, which enters in gas retort, to be mixed with lignite and carry out destructive distillation, the lignite after destructive distillation to hearth combustion.Lignite destructive distillation is combined with circulating fluidized bed boiler, reduces the cost of lignite destructive distillation, and makes lignite combustion (of oil) insitu, realizes the efficient utilization of lignite；High temperature returning charge ash fine size, is conducive to the HYBRID RETORTING with lignite, can substantially reduce lignite destructive distillation cost, and comprehensive benefit is high.
Description
Technical field
The present invention relates to a kind of boiler, especially a kind of destructive distillation circulating fluidized bed boiler.
Background technology
Lignite, also known as bavin coal, English：Lignite (coal)；brown coal ；Wood coal, be degree of coalification most
Low pit coal.A kind of brownish black between peat and pitch coal, lacklustre rudimentary coal.Chemical reactivity is strong, in sky
Easy weathering in gas, is not easy to store and transports, and when burning is serious to air pollution.But since fat coal is almost mined out, it is brown
Coal becomes China master coal to be used, but since the degree of coalification of lignite is too low, causes to have substantial amounts of grey black during burning and floats
In the air, if handling and refining without coal washing, China's haze problem getting worse can largely be caused using inferior position lignite.
Lignite upgrading refers to the process of by either physically or chemically improving lignite quality.Lignite passes through at a certain temperature
Removed after dehydration and thermal decomposition effect outside most of water also with the removing of oxygen-containing functional group, become the Nomenclature Composition and Structure of Complexes of coal
Change, become more fine and close.Property with similar bituminous coal.The heat for reducing water evaporation in combustion process and consuming, is improved
Lignite calorific value and efficiency of combustion.
Lignite distillation process how is set to reduce cost, and make the lignite combustion (of oil) insitu after upgrading be converted into clean electric energy to be
It is crucial.
The content of the invention
It is an object of the present invention to provide a kind of roller conveying type destructive distillation circulating fluidized bed boiler.
Implementing the technical solution adopted in the present invention is, including burner hearth, pot and separator, is set between separator and burner hearth
Destructive distillation cylinder, the returning charge ash of separator, which enters in gas retort, to be mixed with coal and carries out destructive distillation, the coal after destructive distillation to hearth combustion.
Further, the discharge port of destructive distillation cylinder is equipped with roller conveyor.
Further, the separator is horizontal or vertical Adiabatic Cyclone separator.
Further, the feed inlet of burner hearth is equipped with material returning device.
Further, destructive distillation cylinder uses cylinder mode.
Further, the angle of destructive distillation cylinder and horizontal plane is more than 0 degree, less than or equal to 90 degree.
Further, returning charge ash and lignite, which are blended in destructive distillation cylinder, carries out 600 ~ 650 DEG C of destructive distillation.
Further, destructive distillation cylinder inlet and outlet arrange transfer valve.
Further, transfer valve conveys for sealing, and pumped (conveying) medium uses steam.
The beneficial effects of the present invention are, lignite destructive distillation is combined with circulating fluidized bed boiler, reduce lignite destructive distillation into
This, and make lignite combustion (of oil) insitu, boiler produces high parameter steam and is converted into clean electric energy by steam turbine generator again, realizes
The efficient utilization of lignite；High temperature returning charge ash fine size, is conducive to the HYBRID RETORTING with lignite, can substantially reduce lignite destructive distillation into
This, comprehensive benefit is high.
Brief description of the drawings
Fig. 1 is structure diagram of the embodiment of the present invention.
Fig. 2 is the schematic side view of Fig. 1.
Fig. 3 is the destructive distillation cylinder, roller conveyor, cyclone separator position relationship schematic diagram of embodiment.
Fig. 4 is flow chart of the embodiment of the present invention.
Embodiment
Referring to Fig. 1 to Fig. 4, including burner hearth 1, pot and cyclone separator 6, destructive distillation cylinder 2 is set between cyclone separator 6 and burner hearth 1,
The returning charge ash of cyclone separator 6, which enters in destructive distillation cylinder 2, to be mixed with lignite and carries out destructive distillation, and the lignite after destructive distillation to burner hearth 1 burns.
Cyclone separator 6 is horizontal or vertical Adiabatic Cyclone separator；Lignite sets material returning device 5, destructive distillation before entering burner hearth 1
Cylinder 2 uses horizontal cylinder structure.
Roller conveyor 3 send the lignite after destructive distillation to material returning device, then to stove chamber inner combustion.Fired during ignition of the boiler from startup
Material entrance 4 inputs required fuel.
Distillation process is：850 ~ 900 DEG C of returning charge ashes and lignite are circulated in gas retort using recycle stream flower beds boiler high temperature
600 ~ 650 DEG C of low temperature distillation are carried out after mixing, is returned again to after lignite destructive distillation and circulating combustion is carried out in burner hearth.
Fuel in burner hearth burns under fluidized state, and carries out heat exchange, burner hearth with water wall surface in burner hearth
Outlet arrangement high temperature cyclone separator（It is vertical or horizontal）, flue gas leaves burner hearth and carries the flue gas of a large amount of material particles secretly through excessive
After warm cyclone separator, most solid materials are separated by cyclone separator, and lignite is mixed in gas retort
Exchange heat after destructive distillation, return to burner hearth through material returning device and burn away.Flue gas enters back-end ductwork after being come out from cyclone separator, passes through successively
Excessive low temperature superheater, high and low temperature economizer, an air preheater of secondary air, dust-removing desulfurizing device, are finally discharged from chimney.
Material returning device 5 carries out the conveying and sealing of circulating ash, 850 ~ 900 DEG C of high temperature using the U-typed transfer valve of non-mechanical
Circulating ash rolls mixed heat transfer in cylinder after being mixed with lignite and carries out destructive distillation.Destructive distillation cylinder inlet and outlet are arranged with non-mechanical
U-typed transfer valve, pumped (conveying) medium use steam or inert gas, ensure in gas retort without air, it is ensured that system safety and stability is transported
OK.
Material returning device is also referred to as material returning device or material returning valve, is to send the higher combustion chamber of pressure back to by what high-temp solid material was stablized
It is interior, and ensure that the amount that gas anti-channeling enters separator is minimum.Classification has：Two kinds of mechanical valve and non-mechanical valve.Non-mechanical
Material returning device, there is simple, reliable, self-balancing.
The U-typed transfer valve of non-mechanical ensures that material is stablized and is conveyed into burner hearth, while prevents flue gas from playing a reversed role.Standpipe with
Material is sent into burner hearth under the action of burner hearth pressure difference.When outer circulation weakens, standpipe and burner hearth pressure difference are small, and returning charge amount is reduced, tool
There is self-balancing；Height of materials change reduces in standpipe, that is, maintains certain controlling level, prevent flue gas from playing a reversed role.Non- machine
The U-shaped valve of tool formula is acted on self-balancing, is automatically adjusted returning charge amount, without manual adjustment, and cannot mechanically be automatically adjusted.
Claims (7)
1. a kind of roller conveying type destructive distillation circulating fluidized bed boiler, it is characterised in that including burner hearth, pot and separator, separating
Destructive distillation cylinder is set between device and burner hearth, the returning charge ash of separator, which enters in gas retort, to be mixed with coal and carry out destructive distillation, the coal after destructive distillation
To hearth combustion；The discharge port of destructive distillation cylinder is equipped with roller conveyor；The feed inlet of burner hearth is equipped with material returning device.
A kind of 2. roller conveying type destructive distillation circulating fluidized bed boiler according to claim 1, it is characterised in that the separation
Device is horizontal or vertical Adiabatic Cyclone separator.
3. a kind of roller conveying type destructive distillation circulating fluidized bed boiler according to claim 1, it is characterised in that destructive distillation cylinder is adopted
Use cylinder mode.
A kind of 4. roller conveying type destructive distillation circulating fluidized bed boiler according to claim 1 or 3, it is characterised in that destructive distillation
The angle of cylinder and horizontal plane is more than 0 degree, less than or equal to 90 degree.
A kind of 5. roller conveying type destructive distillation circulating fluidized bed boiler according to claim 1, it is characterised in that returning charge ash and
Coal, which is blended in destructive distillation cylinder, carries out 600 ~ 650 DEG C of destructive distillation.
A kind of 6. roller conveying type destructive distillation circulating fluidized bed boiler according to claim 1, it is characterised in that destructive distillation cylinder into
Transfer valve is arranged in outlet.
7. a kind of roller conveying type destructive distillation circulating fluidized bed boiler according to claim 6, it is characterised in that transfer valve is
Sealing conveying, pumped (conveying) medium use steam.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711343120.1A CN108036307A (en) | 2017-12-14 | 2017-12-14 | A kind of roller conveying type destructive distillation circulating fluidized bed boiler |
| CN201811520334.6A CN109611831A (en) | 2017-12-14 | 2018-12-13 | A kind of lignite destructive distillation circulating fluidized bed boiler |
| CN201811521508.0A CN109595541A (en) | 2017-12-14 | 2018-12-13 | A kind of lignite circulating fluidized bed boiler |
| CN201822084851.5U CN209588035U (en) | 2017-12-14 | 2018-12-13 | A kind of lignite destructive distillation circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711343120.1A CN108036307A (en) | 2017-12-14 | 2017-12-14 | A kind of roller conveying type destructive distillation circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108036307A true CN108036307A (en) | 2018-05-15 |
Family
ID=62102979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711343120.1A Pending CN108036307A (en) | 2017-12-14 | 2017-12-14 | A kind of roller conveying type destructive distillation circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108036307A (en) |
-
2017
- 2017-12-14 CN CN201711343120.1A patent/CN108036307A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180515 |
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| WD01 | Invention patent application deemed withdrawn after publication |