CN202947125U - Chemical looping combustion device of variable circulating fluidized bed - Google Patents
Chemical looping combustion device of variable circulating fluidized bed Download PDFInfo
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- CN202947125U CN202947125U CN2012206198417U CN201220619841U CN202947125U CN 202947125 U CN202947125 U CN 202947125U CN 2012206198417 U CN2012206198417 U CN 2012206198417U CN 201220619841 U CN201220619841 U CN 201220619841U CN 202947125 U CN202947125 U CN 202947125U
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- cyclone separator
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- fluidized bed
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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
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Abstract
The utility model belongs to the field of clean energy and efficient utilization, and discloses a chemical looping combustion device of a variable circulating fluidized bed. The chemical looping combustion device of the variable circulating fluidized bed comprises a dual-circulating fluidized bed (including an air reactor and a combustion reactor), a lifting pipe, a cyclone separator, a vertical pipe and bidirectional flow sealing valves, wherein the air reactor comprises a turbulent fluidized bed or a bubbling fluidized bed and the lifting pipe, and the outlet is connected with the cyclone separator; the vertical pipe is arranged at the material outlet end of the cyclone separator and is connected with the bidirectional flow sealing valves; and the bidirectional flow sealing valves are connected with the combustion reactor and the air reactor through a material return inclined pipe. The combustion reactor is identical to the air reactor in configuration structure. The chemical looping combustion device is applicable to direct chemical looping combustion of gas and solid fuels, such as natural gas, coal gasification synthesis gas, pulverized coal, biomass, petroleum coke, sludge and the like; through the two bidirectional flow sealing valves, bed material amounts in the air reactor and the combustion reactor are balanced, retention durations of oxygen carrier in the air reactor and the combustion reactor are improved, and combustion efficiency of pulverized coal is improved; and the tail gas is clean and easy to trap and utilize CO2, and energy of the tail gas can be recycled.
Description
Technical field
The utility model belongs to energy clean energy resource and efficiently utilizes the field, relates to a kind of variable ciculation fluidized bed chemical chain combustion apparatus, is applicable to natural gas (main component is methane), and (main component is H to synthesis gas from coal gasification
2With the CO gaseous mixture) etc. gaseous fuel, the chemical chain burning technology of the solid fuel such as coal, living beings, petroleum coke, mud and the various carriers of oxygen.
Background technology
Burning chemistry chains (chemical looping combustion is called for short CLC) has CO
2High-efficiency low energy consumption recovery, chemical energy cascade utilization, inhibition NO
xThe advantages such as generation and near-zero release are to solve one of high efficiency of energy utilization and eco-friendly important technology.The CLC system is comprised of air reactor and fuel reactor, by the recycling carrier of oxygen (being generally transition metal oxide), discharge active Lattice Oxygen in fuel reactor and in air reactor the activity recovery Lattice Oxygen, the direct catalytic violent combustion reaction of traditional fuel and air is decomposed into two relative relatively mild oxidation-reduction processes.Can avoid oxidized to produce CO
2With other difficult separation components (as the N in air burning
2) mix, combustion reactor outlet tail gas only contains CO
2And steam, steam only need to get final product separating high-purity CO by simple condensation
2Thereby, realize separation of C O in high-efficiency low energy consumption
2With the cascade utilization of energy, improve energy conversion efficient.Because reaction temperature is lower, usually 1000 ℃ of left and right, and in fuel reactor, atmosphere does not contain N
2So, do not have Quick-type and thermal NO
XGenerate.
The utility model content
The utility model purpose of this paper is to provide a kind of variable ciculation fluidized bed chemical chain combustion apparatus, and this device can guarantee fuel (particularly solid fuel such as coal dust) sufficient combustion and high concentration CO
2Enrichment improves energy recycling efficient.
A kind of variable ciculation fluidized bed chemical chain combustion apparatus that the utility model provides, it is characterized in that, this device comprises first, second fluid bed of series connection, the first fluidized bed comprises air reactor, the first cyclone separator, the first loop seal, the first standpipe, and first, second returning charge inclined tube; The second fluid bed comprises combustion reactor, second, third cyclone separator, the second loop seal, the second standpipe, and the 3rd, the 4th returning charge inclined tube;
The air reactor lower end is turbulent bed or bubbling bed, and as expanding reach, the air reactor upper end is fast bed; The arrival end of the first cyclone separator is connected with the outlet of air reactor upper end, the material outlet end of cyclone separator is connected by the first standpipe with the feed space entrance of the first loop seal, one end of the first returning charge inclined tube is connected with the combustion reactor lower end, and the other end is connected with the first returning charge chamber outlet of the first loop seal;
The combustion reactor lower end is turbulent bed or bubbling bed, and equally as expanding reach, the combustion reactor upper end is fast bed; The arrival end of the second cyclone separator is connected with the outlet of combustion reactor upper end, the material outlet end of the second cyclone separator is connected by the second standpipe with the feed space entrance of the second loop seal, one end of the 3rd returning charge inclined tube is connected with the air reactor lower end, and the other end is connected with the first returning charge chamber outlet of the second loop seal;
The second returning charge chamber outlet of the first loop seal is connected with the air reactor lower end, and the second returning charge chamber of the second loop seal exports with the combustion reactor lower end and is connected;
The gas vent of the first cyclone separator is connected with First Heat Exchanger; The gas vent of the second cyclone separator is connected by the entrance of pipeline with the 3rd cyclone separator.
Expanding reach in the utility model Air reactor and combustion reactor is turbulent fluidized bed or bubbling bed, fluidizing agent is respectively air and steam (the perhaps gaseous mixture of steam and flue gas), operating temperature is normal temperature～1000 ℃, and operating pressure is normal pressure.In the utility model, two reactors all adopt the combining form of double-fluidized-bed (being turbulent fluidized bed and fast bed).This structural energy conversion ratio is higher, CO
2Separate purelyr, it is higher that heat transmits utilization ratio.This structure had both guaranteed that the time of staying of the carrier of oxygen fully reacted it, and the heat and mass transfer enhancement process has also guaranteed the particles circulating speed of the carrier of oxygen in the recirculating fluidized bed; Simple to operate and the controllable adjustment scope is wide, the fluidizing gas velocity of controlling reactor and loop seal can be controlled the circular flow of the carrier of oxygen, makes the gasification product reaction of the sufficient carrier of oxygen and coal dust, guarantees the abundant and high concentration CO of coal dust firing
2(when being used for the direct burning chemistry chains of coal); The energy of tail flue gas reclaims, and is used for the generation of steam, improves energy recycling efficient.Owing to common fuel and the oxidation step reduction process of air being divided into relative gentle oxidation and two processes of reduction, improve efficiency of energy utilization.
Description of drawings
Fig. 1 is the structural representation of the utility model device.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further.Need to prove at this, understand the utility model for the explanation of these embodiments for helping, but do not consist of restriction of the present utility model.In addition, below in each embodiment of described the utility model involved technical characterictic just can mutually not make up as long as consist of each other conflict.
The utility model is a kind of to have high-efficiency low energy consumption and captures recycling CO
2The direct chemical chain combustion apparatus of coal, main body adopts double-circulating fluid bed arranged in series, by the cycle rate of two reactors and two-way flow sealed valve control oxygen carrier.
As shown in Figure 1, the utility model device comprises first, second fluid bed of series connection, and the first fluidized bed comprises air reactor 1 and 2, the first cyclone separator 3, the first loop seal 6, the first standpipes 4, and first, second returning charge inclined tube 7,5.The second fluid bed comprises combustion reactor 11 and 12, second, third cyclone separator 15,16, second loop seal 9, the second standpipes 13, and the 3rd, the 4th returning charge inclined tube 8,10
Air reactor lower end 1 is turbulent bed or bubbling bed, and as expanding reach, air reactor upper end 2 is fast bed, as riser.The arrival end of the first cyclone separator 3 is connected with the outlet of air reactor upper end 2, the material outlet end of cyclone separator 3 is connected by the first standpipe 4 with the feed space entrance of the first loop seal 6, one end of the first returning charge inclined tube 7 is connected with combustion reactor lower end 11, and the other end is connected with the first returning charge chamber outlet of loop seal 6.
Combustion reactor lower end 11 is also turbulent bed or bubbling bed, and equally as expanding reach, combustion reactor upper end 12 is fast bed, equally as riser.The arrival end of the second cyclone separator 15 is connected with the outlet of combustion reactor upper end 12, the material outlet end of the second cyclone separator 15 is connected by the second standpipe 13 with the feed space entrance of the second loop seal 9, one end of the 3rd returning charge inclined tube 8 is connected with air reactor lower end 1, and the other end is connected with the first returning charge chamber outlet of the second loop seal 9.
The second returning charge chamber outlet of the first loop seal 6 is connected by the second refeed line 5 with air reactor lower end 1, and the second returning charge chamber of the second loop seal 9 exports with combustion reactor lower end 11 and is connected by the 4th refeed line 10.
The gas vent of the first cyclone separator 3 is connected with First Heat Exchanger 17.
The gas vent of the second cyclone separator 15 is connected by the entrance of pipeline with the 3rd cyclone separator 16, the material outlet of the 3rd cyclone separator 16 is equipped with receives apparatus for ash 14 (as ash bucket), the gas vent of the 3rd cyclone separator 16 is divided into two the tunnel, the circulating flue gas pipeline 21 of wherein leading up to is connected with the inlet plenum of combustion reactor, and the first high temperature break valve 18 and flue gas flow meter 22 are installed on circulating flue gas pipeline 21.Another road of the gas vent of the 3rd cyclone separator 16 is connected with the second heat exchanger 20 by pipeline and the second high temperature break valve 19.
During work, the carrier of oxygen carries out oxidation reaction in air reactor, generates the hyperoxia gesture carrier of oxygen.Control the operating gas velocity of reactor, the reactor lower end can be bubbling bed or turbulent bed, to strengthen the carrier of oxygen and the oxidation reaction of air and the time of staying of the carrier of oxygen.By cyclone separator 3, enter standpipe 4 by gravity after the carrier of oxygen separates and flow into loop seal 6, the carrier of oxygen is divided into two the tunnel through loop seal 6, the returning charge inclined tube 7 of leading up to enters combustion reactor and coal dust reaction, another road enters air reactor and air reaction by returning charge inclined tube 5, further oxidation.In combustion reactor, adopt the mixture of steam or steam and circulating flue gas to carry out fluidisation, steam can also be with coal dust gasification simultaneously.The gasification product of the hyperoxia gesture carrier of oxygen and coal dust carries out reduction reaction, generates the hypoxemia gesture carrier of oxygen.The hypoxemia gesture carrier of oxygen is introduced into second level cyclone separator 15 with coal ash to be separated, the hypoxemia gesture carrier of oxygen that density is larger is separated at the second cyclone separator 15, the coal ash that density is less enters the 3rd cyclone separator 16 through the gas vent of second level cyclone separator 15, then separates.
The hypoxemia gesture carrier of oxygen enters loop seal 9 by standpipe 13, be divided into two the tunnel through loop seal 9, wherein one the tunnel enter returning charge inclined tube 8 and return to air reactor 1 and again carry out oxidation reaction, another road enters returning charge inclined tube 10 and returns to combustion reactor 11 and again carry out reduction reaction.So circulation is completed process of coal combustion also by the bed material balance between two two-way flow seal valve conditioned reaction devices, the particle time of staying, the redox condition of the carrier of oxygen.
The 3rd cyclone separator 16 gas vents at combustion reactor mainly comprise CO
2And steam.By selecting first, second high temperature break valve 18,19 folding, combustion reactor tail gas has two kinds of modes to process.Wherein a kind of way be by high temperature break valve 18 and flue gas flow meter 22 again enter combustion reactor 11 as fluidized gas and will be wherein unburnt coal gasification gas afterburning again, improve the energy utilization; Another kind of way is by fuel reactor heat exchanger 20 condensed steams, obtains high concentration CO
2, be used for recycling and geological storage etc., wherein the energy of combustion reactor and air reactor high-temperature flue gas can be for generation of steam.
If in tail gas, unburnt fuel gas is less, can directly carries out condensation and obtain high-purity CO
2, needn't return to combustion reactor 11 by circulating flue gas pipeline 21 and carry out afterburning.
The two-way flow seal valve can also be extended for the loop seal with three or four returning charge chambers.
The above is preferred embodiment of the present utility model, but the utility model should not be confined to the disclosed content of this embodiment and accompanying drawing.So everyly do not break away from the equivalence of completing under spirit disclosed in the utility model or revise, all falling into the scope of the utility model protection.
Claims (2)
1. a variable ciculation fluidized bed chemical chain combustion apparatus, is characterized in that, this device comprises first, second fluid bed of series connection, the first fluidized bed comprises air reactor, the first cyclone separator, the first loop seal, the first standpipe, and first, second returning charge inclined tube; The second fluid bed comprises combustion reactor, second, third cyclone separator, the second loop seal, the second standpipe, and the 3rd, the 4th returning charge inclined tube;
The air reactor lower end is turbulent bed or bubbling bed, and as expanding reach, the air reactor upper end is fast bed; The arrival end of the first cyclone separator is connected with the outlet of air reactor upper end, the material outlet end of cyclone separator is connected by the first standpipe with the feed space entrance of the first loop seal, one end of the first returning charge inclined tube is connected with the combustion reactor lower end, and the other end is connected with the first returning charge chamber outlet of the first loop seal;
The combustion reactor lower end is turbulent bed or bubbling bed, and equally as expanding reach, the combustion reactor upper end is fast bed; The arrival end of the second cyclone separator is connected with the outlet of combustion reactor upper end, the material outlet end of the second cyclone separator is connected by the second standpipe with the feed space entrance of the second loop seal, one end of the 3rd returning charge inclined tube is connected with the air reactor lower end, and the other end is connected with the first returning charge chamber outlet of the second loop seal;
The second returning charge chamber outlet of the first loop seal is connected with the air reactor lower end, and the second returning charge chamber of the second loop seal exports with the combustion reactor lower end and is connected;
The gas vent of the first cyclone separator is connected with First Heat Exchanger; The gas vent of the second cyclone separator is connected by the entrance of pipeline with the 3rd cyclone separator.
2. variable ciculation fluidized bed chemical chain combustion apparatus according to claim 1, it is characterized in that, the gas vent of the 3rd cyclone separator is divided into two the tunnel, the circulating flue gas pipeline of wherein leading up to is connected with the inlet plenum of combustion reactor, and the first high temperature break valve and flue gas flow meter are installed on the circulating flue gas pipeline; Another road of the gas vent of the 3rd cyclone separator is connected with the second heat exchanger by pipeline and the second high temperature break valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012206198417U CN202947125U (en) | 2012-11-21 | 2012-11-21 | Chemical looping combustion device of variable circulating fluidized bed |
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|---|---|---|---|
| CN2012206198417U CN202947125U (en) | 2012-11-21 | 2012-11-21 | Chemical looping combustion device of variable circulating fluidized bed |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966943A (en) * | 2012-11-21 | 2013-03-13 | 华中科技大学 | Chemical looping combustion device with variable circulating fluidized beds |
| CN103438446A (en) * | 2013-09-02 | 2013-12-11 | 东南大学 | Sealed material returning valve with two-way material returning control function |
| CN104061568A (en) * | 2014-06-26 | 2014-09-24 | 东南大学 | Method and device for capturing CO2 through Cu/Ca-based compound combined cycle |
| CN104197323A (en) * | 2014-09-19 | 2014-12-10 | 东南大学 | Inner and outer circulation coupled device for separating carbon dioxide by burning coal-based chemical loopings |
| CN108410511A (en) * | 2018-04-12 | 2018-08-17 | 哈尔滨理工大学 | A kind of gasification process and device that horizontal Two-way Cycle is biomass fluid bed |
| CN110410781A (en) * | 2019-08-07 | 2019-11-05 | 哈尔滨理工大学 | A kind of magnetic Nano grade oxygen carrier chemical chain reactor and its application method |
-
2012
- 2012-11-21 CN CN2012206198417U patent/CN202947125U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966943A (en) * | 2012-11-21 | 2013-03-13 | 华中科技大学 | Chemical looping combustion device with variable circulating fluidized beds |
| CN102966943B (en) * | 2012-11-21 | 2015-05-20 | 华中科技大学 | Chemical looping combustion device with variable circulating fluidized beds |
| CN103438446A (en) * | 2013-09-02 | 2013-12-11 | 东南大学 | Sealed material returning valve with two-way material returning control function |
| CN103438446B (en) * | 2013-09-02 | 2016-06-08 | 东南大学 | A kind of can the sealing returning charge valve of double-direction control returning charge |
| CN104061568A (en) * | 2014-06-26 | 2014-09-24 | 东南大学 | Method and device for capturing CO2 through Cu/Ca-based compound combined cycle |
| CN104197323A (en) * | 2014-09-19 | 2014-12-10 | 东南大学 | Inner and outer circulation coupled device for separating carbon dioxide by burning coal-based chemical loopings |
| CN104197323B (en) * | 2014-09-19 | 2017-02-15 | 东南大学 | Inner and outer circulation coupled device for separating carbon dioxide by burning coal-based chemical loopings |
| CN108410511A (en) * | 2018-04-12 | 2018-08-17 | 哈尔滨理工大学 | A kind of gasification process and device that horizontal Two-way Cycle is biomass fluid bed |
| CN110410781A (en) * | 2019-08-07 | 2019-11-05 | 哈尔滨理工大学 | A kind of magnetic Nano grade oxygen carrier chemical chain reactor and its application method |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20151121 |
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| EXPY | Termination of patent right or utility model |