CN202598494U - Circulating fluidized bed chemical-looping combustion and CO2 separation device for coal and combustible solid waste - Google Patents
Circulating fluidized bed chemical-looping combustion and CO2 separation device for coal and combustible solid waste Download PDFInfo
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- CN202598494U CN202598494U CN2012202242478U CN201220224247U CN202598494U CN 202598494 U CN202598494 U CN 202598494U CN 2012202242478 U CN2012202242478 U CN 2012202242478U CN 201220224247 U CN201220224247 U CN 201220224247U CN 202598494 U CN202598494 U CN 202598494U
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- fluidized bed
- oxygen carrier
- recirculating fluidized
- dipleg
- coal
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- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a circulating fluidized bed chemical-looping combustion and CO2 separation device for a coal and combustible solid waste. The device mainly comprises a combustion reaction system, a separating system and an oxygen-carrying reaction system, and is characterized in that the combustion reaction system is a circulating fluidized bed fuel reactor (1); the separating system comprises a primary inertial separator (2), a primary inertial separator outlet (3), a primary dipleg (4), a secondary cyclone separator (11), a secondary cyclone separator outlet (10) and a secondary dipleg (12); and the oxygen-carrying reaction system comprises a cross-flow moving-bed air reactor (6), a fresh oxygen carrier particle feeder (5), a J-shaped return valve (8) and an inactive oxygen carrier particle discharge device (C). The method enables matched reaction rates of the oxygen carrier and combustible solid waste, and achieves the effects that the combustion efficiency is high, the oxygen carrying capability of an oxygen carrier is high, the concentration of separated CO2 is high and the final collection efficiency of CO2 is high.
Description
Technical field
The utility model relates to the apparatus and method of the recirculating fluidized bed burning chemistry chains of a kind of coal and solid waste, belongs to coal combustion, recycling of solid wastes utilization and fluidized bed combustion field.
Background technology
China is at present maximum in the world CO2 emission state, forces China must seek efficient and rational CO from the pressure of environmental protection and world opinion
2The reduction of discharging means.Simultaneously, China also is maximum in the world generation of waste materials state, and the growth year by year of solid waste generation has caused the China environmental protection and the ecological balance and had a strong impact on, and wherein, the combustible constituent in the solid waste accounts for China the over half of total amount of giving up admittedly.Present stage, China was still very low to flammable solid useless comprehensive utilization ratio owing to the restriction of technology and condition.Utilize chemical chain burning technology (CLC) to handle the flammable solid discarded object; Both realized the recycling of solid wastes utilization; Reduce its pollution, can help to alleviate the pressure of coal supply and demand again, reduce CO2 emissions environment; Help promoting the formation of China's diversification energy resource structure, have important economy, society and environmental benefit.
Existing flammable solid discarded object is converted into fuel, the combustion product complicated component of these conventional methods, CO with hot chemical treatment (burning, gasification and pyrolysis) method mostly
2Not easily separated.Burning chemistry chains (CLC) then is a kind of burning theory of novelty; Its energy releasing mechanism is no flame chemistry reaction; The not direct and air catalytic combustion of fuel, but react the combustion process that realizes fuel with the cycle alternation of oxygen carrier between two reactors (air reactor and fuel reaction device).By oxygen carrier at first with airborne oxygen generation oxidation reaction, in the fuel reaction device, carry out reduction reaction then and generate carbon dioxide and water with fuel, the carbon dioxide that therefore generates is prone to separated.
At present in China, not only existing solid waste treating technology of using and equipment be for a long time by abroad being monopolized, and the core technology of forward-looking burning chemistry chains (CLC) and pilot scale rank device are all grasped in the hand of research institution abroad especially; The current domestic independent research and development capacity that possessed, close the gap is developed the solid waste chemical chain burning technology that is suitable for China's national situation, has independent intellectual property right in the short period of time, avoids repeating away the road for development that introduction absorbs.
Summary of the invention
Technical problem:The purpose of the utility model is to provide a kind of coal and flammable solid discarded object recirculating fluidized bed burning chemistry chains separation of C O
2Device, overcome the combustion rate of coal/flammable solid discarded object and oxygen carrier and the problems such as coupling of oxygen carrier oxygen carrier reaction rate, and design a kind of coal and flammable solid discarded object recirculating fluidized bed burning chemistry chains separation of C O
2Method, this method can make the two reaction rate be complementary, strong, the isolated CO of the oxygen carrying capability that reaches efficiency of combustion height, oxygen carrier
2Concentration height and CO
2Effects such as final capture rate height.
Technical scheme:The utility model provides a kind of coal and flammable solid discarded object recirculating fluidized bed burning chemistry chains separation of C O
2Device.Coal and solid waste recirculating fluidized bed burning chemistry chains separation of C O
2Device mainly comprises combustion reaction system, piece-rate system and oxygen carrier reaction system three parts; The combustion reaction system is a recirculating fluidized bed fuel reaction device; Piece-rate system comprises one-level inertia separator, the outlet of one-level inertia separator, primary dipleg, secondary cyclone, secondary cyclone outlet and secondary dipleg; The oxygen carrier reaction system comprises cross-flow moving bed air reactor, fresh oxygen carrier granule dispenser, J-shaped returning charge valve and inactivation oxygen carrier granule removal device;
Recirculating fluidized bed fuel reaction device top is connected with the one-level inertia separator through elbow; The bottom of one-level inertia separator connects primary dipleg; The top of one-level inertia separator connects the top of secondary cyclone through the outlet of one-level inertia separator; The bottom of secondary cyclone connects the middle part of primary dipleg through the secondary dipleg; The lower part outlet of primary dipleg is arranged in cross-flow moving bed air reactor, and the bottom of cross-flow moving bed air reactor connects the bottom of recirculating fluidized bed fuel reaction device through J-shaped returning charge valve, inactivation oxygen carrier granule removal device, reactor gasifying agent (steam) inlet and reactor gasifying agent (CO
2) entering the mouth is positioned at the bottommost of recirculating fluidized bed fuel reaction device; Flammable solid discarded object inlet, coal particle inlet are positioned on the wall of bottom of recirculating fluidized bed fuel reaction device.
Recirculating fluidized bed top links to each other with one-level inertia separator top through the elbow of hexagonal angle; The diameter of the primary dipleg that is connected with the one-level inertia separator is the twice of recirculating fluidized bed fuel reaction device diameter, and the diameter of the secondary dipleg that secondary cyclone connects then is a recirculating fluidized bed fuel reaction device diameter 1/2nd; Adopt porous plate as gas distributor in the cross-flow moving bed air reactor, outlet is furnished with the deflector that the cross section is an equilateral triangle.
The utility model coal and solid waste recirculating fluidized bed burning chemistry chains separation of C O
2The method of operating of device is: solid waste and coal particle get into from the bottom of recirculating fluidized bed fuel reaction device; The oxygen loss oxygen carrier that the flue gas that gasification reaction produces carries gets into cross-flow moving bed air reactor with the carbon containing dust after the one-level inertia separator separates; Oxygen carrier after the regeneration is got back to the fuel reaction device and is continued reaction, repeats above process; The carbon containing dust that the one-level inertia separator is separated gets into secondary cyclone with a small amount of oxygen loss oxygen carrier fine grained with flue gas and carries out secondary separation, and the solid particle that separates is back to air reactor and continues reaction; Secondary cyclone is isolated end product CO
2And H
2O discharges, and rejects steam through condensation, obtains highly purified CO
2
Adopt pressure 0.1MPa, particle flux 5 0～100 kg/m in the described recirculating fluidized bed fuel reaction device
2The normal pressure high flux of s, or Ya Li>0.1MPa, particle Tong Liang>200kg/m
2Two kinds of modes of operation of the pressurization high flux of s.
The implementation method thinking of the utility model is following: the flameless combustion course of reaction that in recirculating fluidized bed fuel reaction device, realizes gasification and the gasification product and the oxygen carrier generation of coal and flammable solid discarded object; In inertia separator, realize effective separation process of oxygen carrier granule and flue gas; In cross-flow moving bed air reactor, realize the process of oxygen carrier again of oxygen carrier.And, realize the burning chemistry chains and the CO of coal and flammable solid discarded object through the above process of repetition
2Separate.
Different with traditional solid waste handling process, the handling process of the utility model is: coal particle and flammable solid discarded object particle are followed gasifying agent (steam and CO
2Mixture) generating gasification reaction in recirculating fluidized bed fuel reaction device, coal gasifies compared to solid waste more easily, and the gas of generation can be accelerated course of reaction; Gasification product and the band oxygen oxygen carrier generation combustion reaction of returning recirculating fluidized bed fuel reaction device generate CO
2And H
2O; The flue gas that reaction produces carries oxygen loss oxygen carrier and carbon containing coal ash, gets into the one-level inertia separator and separates; The oxygen loss oxygen carrier that separates advances in the air reactor; Be in contact with one another reaction with the air that laterally passes through and obtain regeneration; Returning recirculating fluidized bed fuel reaction device through one-level returning charge inlet valve afterwards separates; The solid particle that secondary separation is got off (carbon containing dust and oxygen loss oxygen carrier fine grained) returns recirculating fluidized bed fuel reaction device through secondary returning charge inlet valve to be continued to participate in combustion reaction, and isolated gas is rejected H through condensation
2O obtains highly purified CO
2
Beneficial effect:Compare with the solid waste treatment system with existing conventional CLC system, the utlity model has following characteristic and advantage:
1, recirculating fluidized bed and cross-flow moving bed is united utilization, realize the combustion reaction process of solid waste/oxygen carrier and the oxygen carrier course of reaction of oxygen carrier respectively.Through significantly improving the oxygen carrier reaction rate of oxygen carrier, there is the differential reaction matching problem that causes of quantity in solution because of the two reaction rate.
2, the fuel reaction device can adopt normal pressure or pressurized operation, under pressurized conditions, recirculating fluidized bed have density height (Gu-gas volume ratio greater than 0.1), circulating ratio high (50～100), material flux high (; 200kg/m
2S) characteristics; The material particles time of staying is much larger than common The normal pressure fluidized bed reactor; Gas-solid turbulence reaction (reacting like coal and solid waste particle gasification reaction, gasification product reduction oxygen carrier) speed obviously increases; Not only significantly improved the burn rate of solid waste, and imperfect combustion product such as CO reduces effectively in the gas-phase product.Oxygen carrier concentration in the fuel reaction device is far above the ordinary cycle fluidized-bed reactor, and the gasification product of solid waste is by oxygen carrier oxidation fast continuously, thereby improved gasification reaction speed, promoted the gasification reaction of solid waste.
3, the CLC system that breaks traditions adopts the thinking of fluid bed as air reactor, adopt cross-flow moving bed as air reactor, oxygen loss oxygen carrier and air cross-flow hybrid reaction therein.
4, because air reactor adopts special cross-flow moving bed design, oxygen carrier granule passes through in cross-flow moving bed fast.Even sneak into a small amount of carbon containing dust in the oxygen carrier, because the reaction time is short, particle is big, contact area is little, be difficult for sintering takes place, reduced the sintering risk that the carbon containing dust burns and causes in air reactor; Compare with the fluidized bed air reactor, cross-flow moving bed air reactor is simple in structure, and control is convenient.
5, the utility model adopts 120 ° elbow to link to each other with one-level inertia separator top on recirculating fluidized bed top; Followed the hydrodynamics characteristic of movement of particles; Compare with the right angle connected mode of routine, reduced the wearing and tearing of particle, improved the stability of system's operation the junction.
Description of drawings
Fig. 1 is the coal and the flammable solid discarded object recirculating fluidized bed burning chemistry chains separation of C O of the utility model
2The equipments overall structure sketch map.
Fig. 2 is the coal and the flammable solid discarded object recirculating fluidized bed burning chemistry chains separation of C O of the utility model
2Device air structure of reactor enlarged diagram.
More than have among the figure: recirculating fluidized bed fuel reaction device 1, one-level inertia separator 2, one-level inertia separator outlet 3, primary dipleg 4; Fresh oxygen carrier granule dispenser 5, cross-flow moving bed air reactor 6, deflector 7, J-shaped returning charge valve 8; One-level returning charge inlet valve 9, secondary cyclone outlet 10, secondary cyclone 11; Secondary dipleg 12, secondary returning charge inlet valve 13, air ports orifice plate 14.
Flammable solid discarded object inlet A, coal particle inlet B, inactivation oxygen carrier granule removal device C, reactor gasifying agent (steam) inlet D, reactor gasifying agent (CO
2) inlet E, air intake F, air reactor exhaust outlet G.
The specific embodiment
Following coal and the flammable solid discarded object recirculating fluidized bed burning chemistry chains separation of C O that specifies the utility model with reference to Fig. 1
2Method, (main component is Fe to oxygen carrier with iron ore
2O
3) be example.
1) air distribution plate of the useless admittedly reactor of recirculating fluidized bed (following or abbreviation fuel reaction device) 1 bottom layout is a gasification agent inlet, and the lower-left side has two inlets, is flammable solid discarded object inlet A above, is coal particle inlet B below.The right side is one-level returning charge inlet.Steam and CO
2Mixture is as gasifying agent and fluidizing agent, respectively from reactor gasifying agent (steam) the inlet D and the reactor gasifying agent (CO of fuel reaction device 1 bottom
2) inlet E gets into, the returning charge that carry flammable solid discarded object particle that gets into from flammable solid discarded object inlet A and the coal particle that gets into from coal particle inlet B, gets into from one-level returning charge inlet moves upward.In this process, gasifying agent and flammable solid discarded object particle and the reaction of coal particle generating gasification generate fuel gas, and main component is CO and H
2Fuel gas and oxygen carrier generation redox reaction, the oxygen in the oxygen carrier passes to fuel gas, makes CO be oxidized to CO
2, H
2Be oxidized to H
2O (gas), and oxygen carrier loses partial oxygen generation ferrous oxide or tri-iron tetroxide.Oxygen carrier generation redox reaction consumes CO and H
2, also promoted the gasification reaction of coal and flammable solid discarded object.
2) reacted solid particle (oxygen loss oxygen carrier granule and carbon containing dust) is taken out of by flue gas; The one-level inertia separator 2 that entering links to each other with the outlet of fuel reaction device; Most of oxygen loss oxygen carrier granule is separated to be got off to get into the cross-flow moving bed air reactor (following or abbreviation air reactor) 6 that links to each other with primary dipleg 4, and the carbon containing dust then gets into secondary cyclone 11 with flue gas from one-level inertia separator outlet 3 with a small amount of oxygen loss oxygen carrier fine grained.
3) in air reactor 6, one-level inertia separator 2 isolated oxygen loss oxygen carriers carry out the oxygen carrier reaction.The oxygen loss oxygen carrier gets into from the top of air reactor 6; Air evenly gets into through air ports orifice plate 14 backs from air intake F; Redox reaction takes place in both cross-flow contacts, oxygen loss oxygen carrier oxidation by air regeneration, and reacted tail gas is discharged from air reactor exhaust outlet G.Oxygen carrier after the regeneration is got back to the fuel reaction device and is continued reaction through J-shaped returning charge valve 8 and one-level returning charge inlet valve 9.The shuttling movement of material between fuel reaction device 1-one-level inertia separator 2-air reactor 6-fuel reaction device 1 constituted one-level returning charge circulation.When the oxygen carrier oxygen carrying capability obviously descends, replenish the corresponding fresh oxygen carrier from fresh oxygen carrier granule dispenser 5, simultaneously, the oxygen carrier of permanent deactivation is discharged from inactivation oxygen carrier granule removal device C.
4) carry the carbon containing dust and secondary separation takes place in secondary cyclone 11 with a small amount of fine grain flue gas of oxygen loss oxygen carrier.The solid particle that separates gets into secondary dipleg 12, is back to primary dipleg 4 through secondary returning charge inlet valve 13 and continues reaction.The shuttling movement of material between fuel reaction device 1-one-level inertia separator 2-secondary cyclone 11-air reactor 6-fuel reaction device 1-constituted secondary returning charge circulation.CO
2And H
2The admixture of gas of O (gas) is discharged from secondary cyclone outlet 10, rejects steam through condensation, obtains highly purified CO
2
Claims (2)
1. coal and flammable useless admittedly recirculating fluidized bed burning chemistry chains separation of C O
2Device, mainly comprise combustion reaction system, piece-rate system and oxygen carrier reaction system three parts; It is characterized in that the combustion reaction system is a recirculating fluidized bed fuel reaction device (1); Piece-rate system comprises one-level inertia separator (2), the outlet of one-level inertia separator (3), primary dipleg (4), secondary cyclone (11), secondary cyclone outlet (10) and secondary dipleg (12); The oxygen carrier reaction system comprises cross-flow moving bed air reactor (6), fresh oxygen carrier granule dispenser (5), J-shaped returning charge valve (8) and inactivation oxygen carrier granule removal device (C);
The top of recirculating fluidized bed fuel reaction device (1) connects the top of one-level inertia separator (2); The bottom of one-level inertia separator (2) connects primary dipleg (4); The top of one-level inertia separator (2) connects the top of secondary cyclone (11) through one-level inertia separator outlet (3); The bottom of secondary cyclone (11) connects the middle part of primary dipleg (4) through secondary dipleg (12); The lower part outlet of primary dipleg (4) is arranged in cross-flow moving bed air reactor (6); The bottom of cross-flow moving bed air reactor (6) connects the bottom of recirculating fluidized bed fuel reaction device (1) through J-shaped returning charge valve (8), and inactivation oxygen carrier granule removal device (C), reactor gasification agent inlet (D) and reactor gasification agent inlet (E) are positioned at the bottommost of recirculating fluidized bed fuel reaction device (1); Flammable solid discarded object inlet (A), coal particle inlet (B) are positioned on the wall of bottom of recirculating fluidized bed fuel reaction device (1).
2. coal according to claim 1 and flammable useless admittedly recirculating fluidized bed burning chemistry chains separation of C O
2Device, it is characterized in that: the elbow of recirculating fluidized bed top through hexagonal angle links to each other with one-level inertia separator top; The diameter of the primary dipleg (4) that is connected with one-level inertia separator (2) is the twice of recirculating fluidized bed fuel reaction device (1) diameter, and the diameter of the secondary dipleg (12) that secondary cyclone (11) connects then is recirculating fluidized bed fuel reaction device (a 1) diameter 1/2nd; Adopt porous plate as gas distributor in the cross-flow moving bed air reactor (6), outlet is furnished with the deflector that the cross section is an equilateral triangle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202242478U CN202598494U (en) | 2012-05-18 | 2012-05-18 | Circulating fluidized bed chemical-looping combustion and CO2 separation device for coal and combustible solid waste |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202242478U CN202598494U (en) | 2012-05-18 | 2012-05-18 | Circulating fluidized bed chemical-looping combustion and CO2 separation device for coal and combustible solid waste |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705822A (en) * | 2012-05-18 | 2012-10-03 | 东南大学 | Device and method for separating CO2 by circulating fluidized bed chemical looping-combustion of coal and combustible solid waste |
| CN103387209A (en) * | 2013-08-01 | 2013-11-13 | 北京科技大学 | Continuously-running moving bed chemical-looping reaction system |
| CN110173685A (en) * | 2019-05-09 | 2019-08-27 | 上海理工大学 | Utilize the chemical chain combustion apparatus of ash content |
-
2012
- 2012-05-18 CN CN2012202242478U patent/CN202598494U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705822A (en) * | 2012-05-18 | 2012-10-03 | 东南大学 | Device and method for separating CO2 by circulating fluidized bed chemical looping-combustion of coal and combustible solid waste |
| CN102705822B (en) * | 2012-05-18 | 2014-07-09 | 东南大学 | Device and method for separating CO2 by circulating fluidized bed chemical looping-combustion of coal and combustible solid waste |
| CN103387209A (en) * | 2013-08-01 | 2013-11-13 | 北京科技大学 | Continuously-running moving bed chemical-looping reaction system |
| CN110173685A (en) * | 2019-05-09 | 2019-08-27 | 上海理工大学 | Utilize the chemical chain combustion apparatus of ash content |
| CN110173685B (en) * | 2019-05-09 | 2020-06-23 | 上海理工大学 | Chemical looping combustion device utilizing ash |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121212 Effective date of abandoning: 20140709 |
|
| RGAV | Abandon patent right to avoid regrant |