CN108506927A - A kind of high efficiency recycles-is bubbled combined fluidized bed boiler - Google Patents
A kind of high efficiency recycles-is bubbled combined fluidized bed boiler Download PDFInfo
- Publication number
- CN108506927A CN108506927A CN201810258946.6A CN201810258946A CN108506927A CN 108506927 A CN108506927 A CN 108506927A CN 201810258946 A CN201810258946 A CN 201810258946A CN 108506927 A CN108506927 A CN 108506927A
- Authority
- CN
- China
- Prior art keywords
- bed
- fluidized bed
- fuel
- riser
- bubbling
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A kind of combined fluidized bed boiler of high efficiency cycle bubbling is related to a kind of combined fluidized bed multi fuel reaction boiler.The problems such as present invention solves when current single boiler uses single-fuel that waste heat cannot make full use of, and oxynitride discharge is to the pollution of environment.Meanwhile it using clean fuel biomass gasification reaction, collecting fuel gas and utilizing, having wide application prospect.The fluid bed for being bubbled the combined fluidized bed boiler of cycle is divided into three regions, and coal and carbon residue burning may be implemented in bed 1, and bed 2 divides equally material, 3 gasification of biomass of bed；Bed 2 designs both sides connecting tube 1,2 symmetrically, so that half material is flowed into bed 3, meets biomass gasification reaction, do not waste.Its connecting tube is from the horizontal by 45 °, certain drainage is played, overflow of the applying solid particle in fluidisation realizes the orientation transmission of matter and energy between each bed, 3 grades of outer loops are formd, make heat caused by every single step reaction that can fully utilize；The remaining carbon residue of bed 3 returns to bed 1 by connecting tube 3.
Description
Technical field
The present invention relates to fuel gasifications and field of combustion technology, and in particular to a kind of high efficiency cycle-bubbling joint fluidisation
Bed boiler.
Background technology
Technology of Circulating Fluidized Bed Boiler is the high-efficiency low-pollution cleaning burning branch art rapidly developed in recent ten years.With
Other boilers are compared, and it is excellent to have that boiler efficiency is high, desulfurization effect is good, oxynitride discharge amount is low and suitability of fuel is wide etc.
Point, thus have wide development and application foreground.Bubbling fluidized bed boiler is mainly used in the lower feelings of bed material fluidizing velocity
Condition has apparent emulsion zone.However it is most of based on single fluidized bed, and single-fuel is still used, there are fuel combustions
The drawbacks of waste heat cannot make full use of afterwards.
Invention content
The present invention further decreases the discharge of oxynitrides, and profit to increase fuel availability to the maximum extent
Fuel gas after being gasified with biomass (clean energy resource) provides a kind of combined fluidized bed gasification of biomass of bubbling-cycle-coal combustion
The technology of burning.
The technical scheme is that：This combined fluidized bed boiler furnace of bubbling-cycle is largely divided into 3 bed bodies：Bed 1
It is recirculating fluidized bed riser region, bed 2 is bed material separated region, and bed 3 is bubbling fluidized bed region.Wherein coal is carried out in bed 1
With the mixed firinor fuel burning of carbon residue；The separation of bed material is carried out in bed 2；The gasification of biomass is carried out in bed 3.Bed material silica sand carries in bed 1
Coal burning, the heat transfer that coal burning generates is to silica sand particles, and high temperature silica sand particles are with uncombusted coal with riser
Rise, gas solid separation is carried out by cyclone separator.Solid particle enters bed 2 along down-comer, and recycle stock point is carried out in bed 2
From a part flows back to bed 1 and continues to react in riser, and another part flows into bed 3.The recycle stock for carrying high temperature is bed 3
Endogenous substance gasification provides heat, and gasification reaction is contributed to carry out.Independent fluidization system, wherein bed 1 is respectively set in each bed
Fluidisation be the wind regime provided by air blower, entered bed by air distribution plate, as fluidizing agent；Bed 2 and bed 3 fluidisation be by
Boiler generate part water vapour, by throttle valve adjustment, the bed inner nozzle of bed 2 and bed 3 is respectively fed to, as fluidizing agent.
Arrange that water-cooling wall water-cooling wall, riser left bottom are equipped with feed inlet 1 around 1 riser of bed, the fuel such as coal are sent from feed inlet 1
Enter, bottom is equipped with mud hole.In bed 2, left side is equipped with feedback outlet, and right side is equipped with discharge port.In bed 3, bottom right side is equipped with charging
Mouth 2, biomass are sent into from feed inlet 2.The flue gas that recirculating fluidized bed generates leaves boiler through cyclone separator, in bubbling fluidized bed
The fuel gas that gasification of biomass generates is collected by 3 right upper portion gas outlet of bed.Gasification reaction is completed in bubbling fluidized bed
Carbon residue afterwards is returned by connecting tube in riser with silica sand particles, completes the cycle of a cycle.
The present invention has the advantages that compared with prior art：The present invention by fluid bed by being divided into the areas Liang Ge
Domain realizes coal burning and bubbling fluidized bed endogenous substance and the process same time-division for after-flame Coal Gasification in recirculating fluidized bed
Bed carries out；Meanwhile high temperature bed material and carbon residue are regularly flowed into bubbling fluidized bed by bed 2, and heat source is provided for gasification reaction.
The flue gas generated that burns is flowed out from top, and gasification product is exported from Top right gas to flow out.The invention is mainly characterized by allowing cycle
Fluid bed is combined with bubbling fluidized bed, and bed is divided to react, and makes full use of the waste heat of recirculating fluidized bed, can finally be burnt simultaneously
The heat and gasification product of release are reacted, and space availability ratio and capacity usage ratio is greatly saved.In addition the effect of bed 2
More effectively utilize heat because gasification of biomass required temperature is only the 2/3 of coal burning high-temperature particle temperature, thus rationally into
Row heat is distributed so that heating efficiency height, does not waste.Fluidizing agent vapor may be used also in addition to having fluidization in bed 2
To prevent to burn, generation flue gas enters bed 3.
Description of the drawings
Fig. 1 is the graphics that high efficiency recycled-be bubbled combined fluidized bed boiler fluid bed, and Fig. 2 is fluid bed sectional view, figure
3 be bed material flow graph, and Fig. 4 is gas velocity vectors figure.
Specific implementation mode
The operation principle that high efficiency recycled-be bubbled combined fluidized bed boiler is as follows：
1, bed 1（Recirculating fluidized bed）：
A small amount of coal is entered by feed inlet 1 in bed 1, and air is sent by air distribution plate from bottom by air blower, and coal is mixed with air
Combination burning releases a large amount of reaction heat, and the main chemical reactions occurred have：
Meanwhile the mixture main component to come from overflow in bed 3 is the carbon residue after reaction, can also be burnt in bed 1, is burnt
Chemical reaction equation be：
Above-mentioned reaction is exothermic reaction, and 1 temperature of bed is 800-950 DEG C.The flue gas generated burn at the top of cyclone separator
Exhaust outlet is discharged, and high temperature sand grains and carbon residue particle through combustion heating reach cyclone separator tail portion and enter down-comer, by declining
Pipe falls into bed 2, and is gradually accumulated, and 2 both sides connecting tube 1,2 of bed is symmetrical, therefore enters 1 material of bed by feedback outlet and be equal to by discharge port
Into the material of bed 3.Fluidizing agent vapor can also prevent burning from generating flue gas and enter in addition to having fluidization in bed 2
Bed 3 prevents the gaseous product of two generations from not fleeing.Material in bed 3 is flowed into, is the gasification of biomass in bubbling fluidized bed
Energy is provided（Heat source）And gasified raw material（Carbon residue）.
Water-cooling wall is arranged in ciculation fluidized around bed, the water in water-cooling wall is heated during the reaction becomes water vapour, into
Enter the fluidization system of bed 2 and bed 3, high-temperature steam injects at a high speed bed 2, fluidization is played to bed body by the control of throttle valve.
Meanwhile providing gasifying medium for the gasification reaction in bubbling fluidized bed.
2, bed 3（Bubbling fluidized bed）：
The water vapour come out from water-cooling wall enters connecting tube, and the flow of water vapour is controlled by throttle valve adjustment, is then fed into
The nozzle of bubbling fluidized bed, under the drive of high velocity vapor jet stream, particle achievees the effect that fluidisation.
Biomass being sent into from feed inlet 2 in bubbling fluidized bed and being used as gasified raw material, the vapor of bottom end feeding is at this time again
Gasifying medium, using the heat flowed through in recirculating fluidized bed come sand grains and carbon residue, the life that will be passed through in bubbling fluidized bed can be used as
Substance gasifies.Carbon residue is also gasified simultaneously.Gasification product generates imflammable gas and is collected from right upper portion collection gas port.Carbon residue
Gasification reaction fundamental reaction equation be：
Steam converts：（1）
（2）
（3）
Methanation：（4）
（5）
（6）
Formula（1）、（2）For the endothermic reaction, remaining is exothermic reaction.Formula（1）It is one of the main reaction of coal gasification.Formula（2）It is formula（1）
Side reaction, temperature be higher than 1000 DEG C when can ignore, formula（3）For CO shift reaction, only in the presence of a catalyst
Just carried out with significant speed.Formula（4）、（5）、（6）It is more important under pressurized gasification.
Water vapour reacts with the biomass under high temperature, it includes the pyrolysis of biomass, and water vapour-carbon is gone back
Original reaction, transformationreation, methanation reaction of CO and water vapour etc..
（1）Biomass thermal decomposition reaction：The carbohydrate key of macromolecular is broken, and volatile matter is precipitated（Include mainly hydrogen
Gas, carbon monoxide, carbon dioxide, methane, tar and other carbohydrate）, leave carbon and constitute the matrix further reacted.It is raw
At 150 DEG C or more irreversible pyrolysis will occur for substance.
（2）The reduction reaction of water vapour-carbon：
（3）The transformationreation of CO and water vapour：
（4）Methanation reaction：
Above-mentioned reaction is substantially the endothermic reaction, and the temperature of bubbling fluidized bed reduces 200-350 DEG C after gasification.And due to cycle
Fluid bed band people's sand grains and carbon residue carry heat source, therefore the temperature in bubbling bed can be stablized in relatively stable state.
The high temperature carbon residue and sand grains of fluid bed are regular to be fallen into bubbling fluidized bed, ensure that the energy supply of gasification,
Simultaneously because 2 vapor fluidizing agent of bed influences, gasification product is kept apart by the flue gas effectively generated with burning.It realizes and follows
Heat is transmitted between ring fluid bed and bubbling fluidized bed and carries out respective reaction respectively, is independent of each other.
Claims (6)
1. a kind of New Cycle bubbling is combined fluidized bed, the fluid bed is by riser（1）, cyclone separator（2）, sealing gland bed（3）、
Bubbling fluidized bed（4）Composition;Wherein（1）The waste heat that side fuel combustion generates passes through（2）Quilt（3）It utilizes, to improve the profit of fuel
With rate;It is characterized in that：Left side is the riser of recirculating fluidized bed;Intermediate region is connected by connecting line with left side, from
Top to bottm is followed successively by cyclone separator, sealing gland bed;Right side is bubbling fluidized bed bed body, and upper part passes through connecting line and intermediate bed
Expect that separated region bed body is connected, lower part is connected by connecting line with left side riser lower part.
2. New Cycle according to claim 1 is bubbled combined fluidized bed promotion tube portion, it is characterized in that the riser
Practical is a part for recirculating fluidized bed, and the fuel such as coal and carbon residue carry out combustion reaction at this, generate the substances such as carbon dioxide
And release waste heat.
3. New Cycle according to claim 1 is bubbled combined fluidized bed cyclone separator part, it is characterized in that leaning on air-flow
Rotary motion caused by being introduced tangentially into, making, there is the solid particle of larger centrifugal inertial force or drop, which to get rid of to outside wall surface, separates, from
And the fuel of bulky grain is made to come back to bed（1）In burn away, finely ground particle substance is flowed into bed by pipeline（3）Relay afterflame
It burns.
4. New Cycle according to claim 1 is bubbled combined fluidized bed sealing gland bed portions point, it is characterized in that drawing two at two
Part pipeline, makes a part of fuel flow into riser, and another part flows into bubbling fluidized bed, makes fuel by the pipeline of the device
It is made full use of repeatedly.
5. sealing gland bed according to claim 1 introduces bubbling fluidized bed through part pipeline, it is characterized in that utilizing（1）Bed material
The waste heat that burning carries carries out gasification of biomass.
6. bubbling fluidized bed according to claim 1, it is characterized in that tilted down by one after gasification of biomass
Pipeline flows to riser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810258946.6A CN108506927A (en) | 2018-03-27 | 2018-03-27 | A kind of high efficiency recycles-is bubbled combined fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810258946.6A CN108506927A (en) | 2018-03-27 | 2018-03-27 | A kind of high efficiency recycles-is bubbled combined fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108506927A true CN108506927A (en) | 2018-09-07 |
Family
ID=63378567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810258946.6A Pending CN108506927A (en) | 2018-03-27 | 2018-03-27 | A kind of high efficiency recycles-is bubbled combined fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108506927A (en) |
-
2018
- 2018-03-27 CN CN201810258946.6A patent/CN108506927A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9809769B2 (en) | Fluidized bed biogasifier and method for gasifying biosolids | |
| CN102933902B (en) | Chemical loop combustion method with the reaction zone comprising gas solid separation area and the equipment using this method | |
| CN101245264B (en) | Single-bed self-heating type thermal decomposition gasification combustion reactor and thermal decomposition gasification combustion method | |
| CN106221814B (en) | A kind of colm water cooling fireplace segmented couples gasification installation and gasification process | |
| CZ20014156A3 (en) | Device for gasification of carbonaceous charge material | |
| US10611973B2 (en) | Gasification reactor with discrete reactor vessel and grate and method of gasification | |
| KR20120004979A (en) | Two stage dry feed gasification system and process | |
| CN105861066A (en) | Inferior coal segmented-coupling gasifying device and gasifying method | |
| JPH0770569A (en) | Gasification of carbonaceous substance | |
| JP5256802B2 (en) | Gasification furnace structure of gasification equipment | |
| CN106753582A (en) | Low-tar biomass gasifying system | |
| CN110791326B (en) | Circulating fluidized bed gasification device with auxiliary gasification bed and gasification method | |
| CN108085063A (en) | A kind of low tar double bed gasification process and device | |
| CN105189712A (en) | Method and apparatus for recycling ash fines | |
| CN101440308B (en) | Fixed bed-fluidized bed serially connected gasification method and apparatus | |
| CN104560207A (en) | Gasification device of coal derived industrial gas | |
| CN105593346B (en) | Double-fluidized-bed indirect gasification device | |
| CN107267218A (en) | The method and system of solid fuel pyrolysis gasification | |
| WO2003068894A1 (en) | Method and device for gasification | |
| CN108506927A (en) | A kind of high efficiency recycles-is bubbled combined fluidized bed boiler | |
| CN109294625A (en) | The pre-oxidation reactor of fluidization gasification | |
| CN105154141B (en) | A kind of coal gasification reaction device and reaction system and technique based on the device | |
| CN108548174A (en) | Coaxial recirculating fluidized bed biomass coal and biomass combined vaporizing-burning boiler | |
| CN107653006A (en) | A kind of coal dust gasification device and technique for producing high heating value gas and low carbon left | |
| CN107366905A (en) | Gasification of biomass-combined fluidized bed the boiler of coal combustion double bed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180907 |