CN104100992A - Low-energy-consumption oxygen-enriched combustion system coupling solar energy and chemical loop air separation - Google Patents
Low-energy-consumption oxygen-enriched combustion system coupling solar energy and chemical loop air separation Download PDFInfo
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- CN104100992A CN104100992A CN201410333058.8A CN201410333058A CN104100992A CN 104100992 A CN104100992 A CN 104100992A CN 201410333058 A CN201410333058 A CN 201410333058A CN 104100992 A CN104100992 A CN 104100992A
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Abstract
The invention discloses a low-energy-consumption oxygen-enriched combustion system coupling solar energy and chemical looping air separation. The system comprises a dry steam preparing device, a chemical looping air separation device and an oxygen-enriched combustion device. The dry steam preparing device comprises a solar thermal collector, a steam generator and a distributor. Dry steam generated by the dry steam preparing device is divided into two parts by the distributor, one part of the dry steam enters the chemical looping air separation device to serve as the fluidization gas of an oxygen suction reactor, and the other part of the dry steam enters the oxygen-enriched combustion device. High-purity oxygen generated by the chemical looping air separation device enters the oxygen-enriched combustion device to be mixed with the dry steam and fuel for mixed combustion, and high-purity carbon dioxide is acquired by simply condensing and separating combustion products. The low-energy-consumption oxygen-enriched combustion system has the advantages that the dry steam prepared by solar energy can be used as the fluidization gas of the chemical looping air separation device and can also be fed into the oxygen-enriched combustion device to participate in combustion reaction, smoke recycling loops are reduced, energy consumption of the oxygen-enriched combustion system is lowered, and system efficiency is increased.
Description
Technical field
The invention belongs to oxygen-enriched combustion technology field, more specifically, relate to a kind of low energy consumption oxygen-enriched combustion system based on coupled solar and the empty point technology of chemical chain.
Background technology
Since the industrial revolution, due to the needs of industrial development, use a large amount of fossil fuels, make atmospheric carbon dioxide levels continue, fast rise, have a strong impact on global environment, for these global key subjects of carbon dioxide discharge-reduction, a lot of countries have all proposed the project of oneself.Wherein, oxygen-enriched combustion technology, as one of collecting carbonic anhydride technology, can rely on existing traditional coal fired power plant, has good development prospect.
Oxygen-enriched combustion technology is to adopt high-concentration oxygen (95% and more than) to replace air and fuel to burn, and most of flue gas (approximately 70%) circulation is regulated to a kind of high-efficiency cleaning technology of the interior adiabatic flame temperature of burner hearth simultaneously.Oxygen-enriched combustion technology combines traditional power plant with air gas separation unit and fume treatment unit, be to produce high-pureness carbon dioxide the final effective ways of controlling CO2 emission.In oxygen-enriched combustion technology, the oxygen-enriched stream (oxygen purity is greater than or equal to 95%) that air gas separation unit produces is mixed with circulating flue gas and passes in combustion chamber, consistent with traditional combustion by reasonably adjusting two bursts of ignition temperatures of controlling boiler internal with flow to the temperature of gas.Because fuel burns in the atmosphere of a low N2 high carbon dioxide and water, mainly formed by carbon dioxide and steam so generate flue gas, can obtain highly purified carbon dioxide product through comparatively simple post processing.
Conventional method for producing oxygen through is divided into two classes at present, and a class is partition method, separates with nitrogen by airborne oxygen by physics mode (cryogenic air separation unit or alternating temperature or pressure-variable adsorption), obtains the oxygen of different purity; Another kind is preparation method, adopts chemical reagent, by redox reaction oxygen producing.Wherein cryogenic air separation unit technology is the most frequently used method for producing oxygen through, and it utilizes the difference of each component boiling point in air, first by air liquefaction, then, by part evaporation and the partial condensation of continuous several times, isolates airborne each component.The main feature of this technology is that output is large, oxygen purity is high, there is advantage in large-scale, super-huge aerobic occasion, but conventional cryogenic air separation unit oxygen (ASU) system energy consumption is higher, account for greatly 10% to 40% of the clean output in whole power station, and its cost of equipment is also higher, account for 40% left and right of system total equipment cost.
Empty point technology (the Chemical Looping Air Separation of chemical chain, CLAS), using metal oxide as the carrier of oxygen, there is decomposition reaction releasing oxygen by metal oxide (under steam or carbon dioxide atmosphere) under suitable temperature and oxygen debt environment, and there is oxidation reaction and realize regeneration in the carrier of oxygen after oxygen release in air atmosphere, thereby from air, isolate oxygen, its cardinal principle is to utilize oxygen uptake reactor different with the partial pressure of oxygen in oxygen release reactor, and the circulation of controlling carrier of oxygen oxygen uptake reaction and oxygen release reaction occurs.Due to temperature and atmosphere in empty point of Technology Need control oxygen uptake reactor of chemical chain and oxygen release reactor, and required bed material amount and circulating ratio larger, therefore need a large amount of fluidized gas to make a bed material fluidisation, in real process, still can produce larger energy consumption.
The oxygen-enriched combustion system of the empty point technology of employing chemical chain normally passes into flue gas recycled oxygen release reactor and produces the mist that is rich in oxygen and carbon dioxide at present, but this system often needs more outside heat to maintain required temperature conditions in oxygen release reactor and oxygen uptake reactor, make system energy consumption high, in addition in the flue gas of oxygen release reactor, contained a certain amount of oxygen and be easier to reach oxygen uptake and oxygen release balance owing to passing into, actual oxygen making amount is less, is difficult to meet the needs of oxygen-enriched combusting; Also the oxygen-enriched combusting scheme that has some to adopt the empty point technology of chemical chain is to extract the fluidized gas of part steam as oxygen release reactor from oxygen-enriched combusting power generator turbine, but this mode can significantly reduce oxygen-enriched combustion system efficiency.
Summary of the invention
For the above defect of prior art existence, the invention provides the low energy consumption oxygen-enriched combustion system of the empty point technology of a kind of coupled solar and chemical chain, it has advantages of that efficiency is high, energy consumption is low, cost is low and systemic contamination thing discharges few.
A kind of low energy consumption oxygen-enriched combustion system provided by the invention, it comprises solar energy dry saturated steam device for making, chemical chain air separation unit and oxygen-enriched burning device, wherein, the solar energy dry saturated steam device for making being formed by solar thermal collector, steam generator and current divider, the chemical chain air separation unit being formed by oxygen release reactor, oxygen uptake reactor, cyclone separator, heat exchanger and the oxygen-enriched combustion system being formed by steam generator system, tail flue gas purifier, wherein
Described solar energy dry saturated steam device for making comprises solar thermal collector, steam generator and current divider, the water that passes into described steam generator reacts and generates dry saturated steam under the effect of described solar thermal collector heat, dry saturated steam is divided into two strands through described current divider: one dry saturated steam F enters chemical chain air separation unit, and another gang of dry saturated steam I enters oxygen-enriched burning device;
Described chemical chain air separation unit comprises air preheater, oxygen release reactor, oxygen uptake reactor, the first cyclone separator, the second cyclone separator, First Heat Exchanger, the second heat exchanger and condenser, wherein, air B enters in oxygen uptake reactor after air preheater preheating, and with in oxygen uptake reactor, there is oxidation reaction through the isolated low gesture carrier of oxygen of the first cyclone separator and generate the high gesture carrier of oxygen, the oxygen debt air existing in oxygen uptake reactor with the high gesture carrier of oxygen by separating through cyclone separator, wherein, isolated oxygen debt air enters air preheater 7 and adds hot-air B, the high gesture carrier of oxygen enters oxygen release reactor and carries out oxygen release reaction, the dry saturated steam F producing through dry saturated steam device for making enters in oxygen release reactor for controlling the partial pressure of oxygen of oxygen release reactor after First Heat Exchanger heating, in oxygen release reactor, there is decomposition reaction and generate the low gesture carrier of oxygen in the described high gesture carrier of oxygen, gas component in oxygen release reactor enters the second cyclone separator with the low gesture carrier of oxygen and separates, wherein, the gas group that separation obtains is divided into and enters successively First Heat Exchanger and utilize the remaining temperature of gas component to heat dry saturated steam, carry out cooling through the second heat exchanger again, then enter condensation in condenser, isolate thus condensed water H, thereby obtain highly purified oxygen G, the low gesture carrier of oxygen that separation obtains enters in oxygen uptake reactor again and reacts, and completes the circulation of the carrier of oxygen between oxygen uptake reactor and oxygen release reactor by this kind of mode,
Described oxygen-enriched burning device comprises boiler unit and tail gas treating unit, the dry saturated steam I and the fuel J that after the high-concentration oxygen obtaining through chemical chain air separation unit enters boiler unit, produce with dry saturated steam device for making mix, there is violent combustion reaction and generate the gaseous products that comprises carbon dioxide and steam, described gaseous products enter tail gas treating unit through purifying, dry, compression condensation and separate after, obtain highly purified carbon dioxide.
Air separation unit is the chemical chain air separation unit of coupled solar dry saturated steam device for making, utilize solar energy that energy density is low to prepare the water vapour of low-yield taste, in histochemistry's chain air separation unit, oxygen release reacts required low oxygen partial pressure and reaction temperature, preparation high-grade oxygen, ingenious coupled solar dry saturated steam device for making, chemical chain air separation unit and oxygen-enriched burning device, realize physical energy and chemical energy cascade utilization, realize the trapping of coal-fired carbon dioxide, improve the efficiency of oxygen-enriched combustion system.
As further preferably, described solar thermal collector adopts trough type solar heat-collector.
Utilize solar thermal collector that energy density is low to prepare the water vapour of low-yield taste, replace steam generator that conventional energy consumption is high or huge heat exchanger, realize coal dust water vapour-oxygen-enriched combusting.Trough type solar heat-collector has compact conformation, processing is simple, the advantage that manufacturing cost is lower.
As further preferably, described oxygen release reactor reaction temperature is 800-1000 DEG C.
As further preferably, the described carrier of oxygen be in copper metal oxide, manganese metal oxide or cobalt metal oxide any one or mix.
As further preferably, the described carrier of oxygen be in perovskite, Copper Ores, manganese ore or Copper Ores any one or mix.
As further preferably, when the described carrier of oxygen is copper metal oxide, the partial pressure of oxygen in oxygen release reactor is 0.0005-0.0430atm.
As further preferably, the combustion system of described oxygen-enriched burning device is steam-oxygen-enriched combusting.
In general, the above technical scheme of conceiving by the present invention compared with prior art, can obtain following beneficial effect:
(1) by solar energy heat collector, this solar energy low-grade energy is used for producing dry saturated steam, the dry saturated steam obtaining can be used as the fluidized gas of chemical chain air separation unit, can pass into again oxygen-enriched burning device and participate in combustion reaction, avoid flue gas recirculation loop, reduce oxygen-enriched combustion system energy consumption, the efficiency of raising system, has reduced the demand of system to fossil fuel;
(2) dry flue gas is replaced traditional circulating flue gas pass in oxygen-enriched combustion boiler unit, in avoiding flue gas recirculation loop, simplification oxygen-enriched combustion system, reducing costs, also avoid the enrichment of nitrogen element in boiler, reduced the discharge of pollutant NOx, environmental friendliness;
(3) dry saturated steam that solar energy equipment is produced is applied in oxygen-enriched burning device, without extract part steam from oxygen enrichment burning device, has ensured the generated output of oxygen-enriched combustion system;
(4) more easily realize the trapping of carbon dioxide: boiler product gas component is mainly carbon dioxide and water, can realize separation and the trapping of carbon dioxide through relatively simple processing.
Brief description of the drawings
Fig. 1 is the low energy consumption oxygen-enriched combustion system structural representation of coupled solar of the present invention and the empty point technology of chemical chain;
Fig. 2 is dry saturated steam device for making structural representation of the present invention;
Fig. 3 is chemical chain air separation unit structural representation of the present invention;
Fig. 4 is oxygen-enriched burning device structural representation of the present invention;
Fig. 5 is the low energy consumption oxygen-enriched combustion system structural representation of embodiment bis-;
Fig. 6 is the low energy consumption oxygen-enriched combustion system structural representation of embodiment tri-.
In institute's drawings attached, identical Reference numeral is used for representing identical element or structure, wherein:
1-dry saturated steam device for making; 2-current divider; 3-chemical chain air separation unit; 4-oxygen-enriched burning device; 5-solar thermal collector; 6-steam generator; 7-air preheater; 8-oxygen uptake reactor; 9-the first cyclone separator; 10-oxygen release reactor; 11-the second cyclone separator; 12-First Heat Exchanger, 13-the second heat exchanger; 14-condenser; 15-boiler unit; 16-tail gas treating unit; The conventional cryogenic air separation plant of 17-; 18-blender.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
As shown in Figure 1, the low energy consumption oxygen-enriched combustion system of the empty point technology of a kind of coupled solar and chemical chain, it comprises dry saturated steam device for making 1, chemical chain air separation unit 3 and oxygen-enriched burning device 4, dry saturated steam device for making 1 is for producing the required dry saturated steam of reaction, chemical chain air separation unit 3 is for separating of going out high-purity oxygen, and oxygen-enriched burning device 4 is realized the trapping of carbon dioxide for oxygen-enriched combusting.
As shown in Figure 2, dry saturated steam device for making 1 comprises solar thermal collector 5, steam generator 6 and current divider 2, the water that passes into steam generator 6 reacts and generates dry saturated steam under solar thermal collector 5 heat effects, dry saturated steam is divided into two strands through current divider 2: one dry saturated steam F enters chemical chain air separation unit 3, and another gang of dry saturated steam I enters oxygen-enriched burning device 4.
As shown in Figure 3, chemical chain air separation unit 3 comprises oxygen release reactor, oxygen uptake reactor, cyclone separator, heat exchanger, wherein, air B enters in oxygen uptake reactor 8 after air preheater 7 preheatings, generates the high gesture carrier of oxygen through the isolated low gesture carrier of oxygen generation oxidation reaction of the first cyclone separator 11, gas component in oxygen uptake reactor 8 separates through cyclone separator 9 with the low gesture carrier of oxygen, wherein, oxygen debt air (main component is nitrogen) enters air preheater 7 and adds hot-air B, the described high gesture carrier of oxygen enters oxygen release reactor 10 and carries out oxygen release reaction, the dry saturated steam F producing through dry saturated steam device for making enters in oxygen release reactor 10 to control the partial pressure of oxygen in oxygen release reactor 10 after heat exchanger 12 heating, the described high gesture carrier of oxygen issues raw decomposition reaction in suitable temperature and partial pressure of oxygen and generates the low gesture carrier of oxygen, composition in oxygen release reactor 10 is mainly the gas component of oxygen G&W and the low gesture carrier of oxygen and enters the second cyclone separator 11 and separate, wherein, described gas component enters heat exchanger 12 dry saturated steam is heated, through heat exchanger 13 carry out cooling after, in condenser 14, carry out condensation again, isolate condensed water H, obtain highly purified oxygen G, the described low gesture carrier of oxygen enters in oxygen uptake reactor 8 again and reacts, and completes the circulation of the carrier of oxygen between oxygen uptake reactor 8 and oxygen release reactor 10 by this kind of mode,
As shown in Figure 4, oxygen-enriched burning device comprises boiler unit 15 and tail gas treating unit 16, described high-concentration oxygen mixes with dry saturated steam I and fuel J after entering boiler unit 15, there is violent combustion reaction and generate the gaseous products that comprises carbon dioxide and steam, described gaseous products enter tail gas treating unit 16 through purifying, dry, compression condensation and separate after, can obtain highly purified carbon dioxide.
The present invention utilizes the low-grade energy of this regenerative resource of solar energy to produce dry saturated steam, for the use of chemical chain air separation unit and oxygen-enriched burning device, and pass through solar energy heat collector, chemical chain air separation unit and oxygen-enriched burning device design and respectively each device and airflow line connected mode are each other optimized to ensure that the low energy consumption of whole oxygen-enriched combustion system moves, realize low energy consumption, low cost is carried out oxygen-enriched combustion technology, realize the object of collecting carbonic anhydride, reach system clean, object efficiently, also reduced the demand of system to fossil fuel.
Utilize said system, the oxygen-enriched combusting mode that realizes clean low energy consumption mainly comprises the following steps:
A) utilize groove type solar heat collector 5 to collect solar energy, steam raising plant 6 utilizes the solar energy of collecting to produce dry saturated steam, dry saturated steam is divided into two strands by current divider 2, one dry saturated steam F enters chemical chain air separation unit 3 as the fluidized gas in its oxygen release reactor 10, and another gang of dry saturated steam I enters oxygen-enriched burning device;
B) air B enters in oxygen uptake reactor 8 after air preheater 7 preheatings, and with the low gesture carrier of oxygen, oxidation reaction occurs in oxygen uptake reactor 8 and generate the high gesture carrier of oxygen; Select the different carriers of oxygen according to the design temperature of reactor, temperature is generally 800～1000 DEG C, the selectable carrier of oxygen can be in copper metal oxide, manganese metal oxide or cobalt metal oxide any one or mix, also can be in perovskite, Copper Ores, manganese ore or Copper Ores any one or mix, in the present embodiment, preferably copper metal oxide, as the carrier of oxygen, passes into the carrier of oxygen in oxygen uptake reactor 8 by carrier of oxygen charging aperture;
C) in oxygen uptake reactor 8, the low gesture carrier of oxygen is by Air Fluidized, and react with airborne oxygen, generate the high gesture carrier of oxygen and oxygen debt air, the collaborative high gesture carrier of oxygen of oxygen debt air enters the first cyclone separator 9, separate oxygen debt air and the high gesture carrier of oxygen through the first cyclone separator 9, isolated oxygen debt air enters air preheater 7 and adds hot-air B, and the high gesture carrier of oxygen enters oxygen release reactor 10 and carries out oxygen release reaction;
D) the dry saturated steam F producing through dry saturated steam device for making enters in oxygen release reactor 10 for regulating the partial pressure of oxygen of oxygen release reactor 10 after First Heat Exchanger 12 heating, and the high gesture carrier of oxygen decomposition reaction occurs in oxygen release reactor 10 and generates the low gesture carrier of oxygen;
E) gas component in oxygen release reactor 10 enters the second cyclone separator 11 with the low gesture carrier of oxygen and separates, separate through the second cyclone separator 11 gas component obtaining and enter First Heat Exchanger 12, utilize the Yu Wenke of this gas component to heat dry saturated steam, reduce the waste of energy, gas component is carried out cooling through the second heat exchanger 13 again, then enter condensation in condenser 14, isolate thus condensed water H, thereby obtain highly purified oxygen; Separate through the second cyclone separator 11 the low gesture carrier of oxygen obtaining and can enter again in oxygen uptake reactor 8 and react, complete the circulation of the carrier of oxygen between oxygen uptake reactor 8 and oxygen release reactor 10 by this kind of mode, reduce the waste of resource;
F) the dry saturated steam I and the fuel J that after the high-concentration oxygen obtaining through chemical chain air separation unit enters boiler unit 15, produce with dry saturated steam device for making mix, there is violent combustion reaction and generate the gaseous products that comprises carbon dioxide and steam, described gaseous products enter tail gas treating unit 16 through purifying, dry, compression condensation and separate after, obtain highly purified carbon dioxide.
Described method is utilized trough type solar heat-collector, compact conformation, and the floor space of solar collecting device is little; Manufacture the required component form of heat collector few, easily realize standardization, be applicable to batch production; Surface Machining for focusing sunlight is simple, and manufacturing cost is lower.
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment mono-:
The low energy consumption oxygen-enriched combustion system of the empty point technology of the coupled solar of this example and chemical chain, it comprises dry saturated steam device for making 1, chemical chain air separation unit 3 and oxygen-enriched burning device 4, dry saturated steam device for making 1 is for producing the required dry saturated steam of reaction, chemical chain air separation unit 3 is for separating of going out high-purity oxygen, oxygen-enriched burning device 4 is for oxygen-enriched combusting and realize the trapping of carbon dioxide, the carrier of oxygen using is the copper base carrier of oxygen
Dry saturated steam device for making 1 comprises solar thermal collector 5, steam generator 6 and current divider 2, the water that passes into steam generator 6 produces dry saturated steam under solar thermal collector 5 heat effects, dry saturated steam is divided into two strands through current divider 2: one dry saturated steam F enters chemical chain air separation unit 3, another gang of dry saturated steam I enters oxygen-enriched burning device 4
Chemical chain air separation unit 3 comprises oxygen release reactor, oxygen uptake reactor, cyclone separator, heat exchanger, wherein, air B enters in oxygen uptake reactor 8 after air preheater 7 preheatings, generates the high gesture carrier of oxygen through the isolated low gesture carrier of oxygen generation oxidation reaction of the first cyclone separator 11, gas component in oxygen uptake reactor 8 separates through cyclone separator 9 with the low gesture carrier of oxygen, wherein, oxygen debt air (main component is nitrogen) enters air preheater 7 and adds hot-air B, the high gesture carrier of oxygen enters oxygen release reactor 10 and carries out oxygen release reaction, the dry saturated steam F producing through dry saturated steam device for making enters in oxygen release reactor 10 to control the partial pressure of oxygen in oxygen release reactor 10 after heat exchanger 12 heating, particularly, in the present embodiment, making the partial pressure of oxygen in oxygen release reactor by the content of control dry saturated steam is 0.0005-0.0430atm, the high gesture carrier of oxygen issues raw decomposition reaction in suitable temperature (800-1000 DEG C) and partial pressure of oxygen (0.0005-0.0430atm) and generates the low gesture carrier of oxygen, composition in oxygen release reactor 10 is mainly the gas component of oxygen G&W and the low gesture carrier of oxygen and enters the second cyclone separator 11 and separate, gas component enters heat exchanger 12 dry saturated steam is heated, through heat exchanger 13 carry out cooling after, in condenser 14, carry out condensation again, isolate condensed water H, obtain highly purified oxygen G, the described low gesture carrier of oxygen enters in oxygen uptake reactor 8 again and reacts, and completes the circulation of the carrier of oxygen between oxygen uptake reactor 8 and oxygen release reactor 10 by this kind of mode,
Oxygen-enriched burning device comprises boiler unit 15 and tail gas treating unit 16, high-concentration oxygen mixes with dry saturated steam I and fuel J after entering boiler unit 15, violent combustion reaction occurs to produce a large amount of heat and generates electricity, generate the gaseous products that comprises carbon dioxide and steam simultaneously, gaseous products enter tail gas treating unit 16 through purifying, dry, compression condensation and separate after, can obtain highly purified carbon dioxide.
Embodiment bis-:
This example comprises dry saturated steam device for making, chemical chain air separation unit, conventional air separation unit and oxygen-enriched burning device, the difference of itself and embodiment mono-is that this system also comprises conventional air separation unit, and conventional air separation unit and chemical chain air separation unit provide oxygen-enriched burning device required high-purity oxygen jointly.
Utilize the oxygen-enriched combustion system described in the present embodiment, the oxygen-enriched combusting mode that realizes clean low energy consumption mainly comprises the following steps:
A) utilize groove type solar heat collector 5 to collect solar energy, steam raising plant 6 utilizes the solar energy of collecting to produce dry saturated steam, dry saturated steam is divided into two strands by current divider 2, one dry saturated steam F enters chemical chain air separation unit 3 as the fluidized gas in its oxygen release reactor 10, and another gang of dry saturated steam I enters oxygen-enriched burning device;
B) air B enters in oxygen uptake reactor 8 after air preheater 7 preheatings, and with the low gesture carrier of oxygen, oxidation reaction occurs in oxygen uptake reactor 8 and generate the high gesture carrier of oxygen; Select the different carriers of oxygen according to the design temperature of reactor, temperature is generally 800-1000 DEG C, the selectable carrier of oxygen can be in copper metal oxide, manganese metal oxide or cobalt metal oxide any one or mix, also can be in perovskite, Copper Ores, manganese ore or Copper Ores any one or mix, in the present embodiment, preferably copper metal oxide, as the carrier of oxygen, passes into the carrier of oxygen in oxygen uptake reactor 8 by carrier of oxygen charging aperture;
C) in oxygen uptake reactor 8, the low gesture carrier of oxygen is by Air Fluidized, and react with airborne oxygen, generate the high gesture carrier of oxygen and oxygen debt air, the collaborative high gesture carrier of oxygen of oxygen debt air enters the first cyclone separator 9, separate oxygen debt air and the high gesture carrier of oxygen through the first cyclone separator 9, isolated oxygen debt air enters air preheater 7 and adds hot-air B, and the high gesture carrier of oxygen enters oxygen release reactor 10 and carries out oxygen release reaction;
D) the dry saturated steam F producing through dry saturated steam device for making enters in oxygen release reactor 10 for regulating the partial pressure of oxygen of oxygen release reactor 10 after First Heat Exchanger 12 heating, and the high gesture carrier of oxygen decomposition reaction occurs in oxygen release reactor 10 and generates the low gesture carrier of oxygen;
E) gas component in oxygen release reactor 10 enters the second cyclone separator 11 with the low gesture carrier of oxygen and separates, separate through the second cyclone separator 11 gas component obtaining and enter First Heat Exchanger 12, utilize the Yu Wenke of this gas component to heat dry saturated steam, reduce the waste of energy, gas component is carried out cooling through the second heat exchanger 13 again, then enter condensation in condenser 14, isolate thus condensed water H, thereby obtain highly purified oxygen; Separate through the second cyclone separator 11 the low gesture carrier of oxygen obtaining and can enter again in oxygen uptake reactor 8 and react, complete the circulation of the carrier of oxygen between oxygen uptake reactor 8 and oxygen release reactor 10 by this kind of mode;
F) the dry saturated steam I and the fuel J that after entering boiler unit 15 after the high-concentration oxygen obtaining through chemical chain air separation unit mixes with the high-concentration oxygen making through conventional air separation unit, produce with dry saturated steam device for making mix, there is violent combustion reaction and generate the gaseous products that comprises carbon dioxide and steam, described gaseous products enter tail gas treating unit 16 through purifying, dry, compression condensation and separate after, obtain highly purified carbon dioxide.
Embodiment tri-:
This example adopts solar energy dry saturated steam device for making to produce dry saturated steam, and circulating flue gas and dry saturated steam are entered in chemical chain space division system oxygen release reactor as fluidized gas, control partial pressure of oxygen, produce oxygen-rich mixture, then enter in boiler unit and react with fuel.
A) utilize groove type solar heat collector 5 to collect solar energy, steam raising plant 6 utilizes the solar energy of collecting to produce dry saturated steam, dry saturated steam is divided into two strands by current divider 2, one dry saturated steam F is mixed into chemical chain air separation unit 3 as the fluidized gas in its oxygen release reactor 10 by blender 18 and circulating flue gas, and another gang of dry saturated steam I enters oxygen-enriched burning device;
B) fluidized gas of oxygen uptake reactor 8 is air, and air B enters oxygen uptake reactor after heat exchanger 7, in oxygen uptake reactor 8, reacts with the low gesture carrier of oxygen;
C) select the different carriers of oxygen according to the design temperature of chemical chain air separation unit reactor, the carrier of oxygen is passed in oxygen uptake reactor 8 by carrier of oxygen charging aperture;
D) in oxygen uptake reactor 8, the low gesture carrier of oxygen is fluidized wind Air Fluidized, and reacts with airborne oxygen, generates the high gesture carrier of oxygen, and the collaborative high gesture carrier of oxygen of fluidized gas enters cyclone separator 9, separates through cyclone separator 9;
E) the isolated gaseous product of cyclone separator 9, enters in heat exchanger 7, and the fluidized gas air B of oxygen uptake reactor is heated, and the isolated solid product of cyclone separator 9, is admitted in oxygen release reactor 10;
F) the high gesture carrier of oxygen enters after oxygen release reactor 10, be fluidized air-flow, and react and discharge oxygen, the high gesture carrier of oxygen is converted into the low gesture carrier of oxygen, collaborative oxygen and the low gesture carrier of oxygen generating of fluidized gas, enters whirlwind current divider 11, separates through cyclone separator, the low gesture carrier of oxygen is admitted to oxygen uptake reactor 10, completes the circulation of the carrier of oxygen;
G) through the isolated oxygen enrichment blender of cyclone separator 11, heat after fluidized gas through fluidized gas superheater 12, then pass through condensation separation, enter oxygen-enriched burning device 4, for the burning of fuel J provides required oxygen amount, produce a large amount of heat, for the utilization of generating electricity;
H) the portion gas product of boiler unit 15, the gaseous products of generation is mainly CO
2and steam, enter in exhaust treatment system 16, through purifying, dry, compression condensation and separate after, can obtain highly purified carbon dioxide C; Another part gaseous product of boiler unit 15, can be used as the fluidized gas F of oxygen release reactor.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a low energy consumption oxygen-enriched combustion system for the empty point technology of coupled solar and chemical chain, is characterized in that, comprises solar energy dry saturated steam device for making, chemical chain air separation unit and oxygen-enriched burning device, wherein,
Described solar energy dry saturated steam device for making comprises solar thermal collector (5), steam generator (6) and current divider (2), the water that passes into described steam generator (5) is converted into dry saturated steam under described solar thermal collector (5) heat effect, dry saturated steam is divided into two strands through described current divider (2): one dry saturated steam F enters chemical chain space division system, and another gang of dry saturated steam I enters oxygen-enriched combustion system;
Described chemical chain air separation unit comprises air preheater (7), oxygen release reactor (10), oxygen uptake reactor (8), the first cyclone separator (9), the second cyclone separator (11), First Heat Exchanger (12), the second heat exchanger (13) and condenser (14), wherein, air B enters in oxygen uptake reactor (8) after air preheater (7) preheating, and generates the high gesture carrier of oxygen with the low gesture carrier of oxygen generation oxidation reaction in oxygen uptake reactor (8), the oxygen debt air existing in oxygen uptake reactor (8) with the high gesture carrier of oxygen by separating through cyclone separator (9), wherein, isolated oxygen debt air enters air preheater 7 and adds hot-air B, the high gesture carrier of oxygen enters oxygen release reactor (10) and carries out oxygen release reaction, the dry saturated steam F producing through dry saturated steam device for making enters in oxygen release reactor (10) for controlling the partial pressure of oxygen of oxygen release reactor 10 after First Heat Exchanger (12) heating, in oxygen release reactor (10), there is decomposition reaction and generate the low gesture carrier of oxygen and oxygen in the described high gesture carrier of oxygen, gas component in oxygen release reactor (10) enters the second cyclone separator (11) with the low gesture carrier of oxygen and separates, wherein, the gas group that separation obtains is divided into and enters successively First Heat Exchanger (12) and utilize the remaining temperature of gas component to heat dry saturated steam, carry out cooling through the second heat exchanger (13) again, then enter condensation in condenser (14), isolate thus condensed water H, thereby obtain highly purified oxygen G, the low gesture carrier of oxygen that separation obtains enters in oxygen uptake reactor (8) again and reacts, and completes the circulation of the carrier of oxygen between oxygen uptake reactor (8) and oxygen release reactor (10) by this kind of mode,
Described oxygen-enriched burning device comprises boiler unit (15) and tail gas treating unit (16), the dry saturated steam I and the fuel J that after the high-concentration oxygen obtaining through chemical chain air separation unit enters boiler unit (15), produce with dry saturated steam device for making mix, there is violent combustion reaction and generate the gaseous products that comprises carbon dioxide and steam, described gaseous products enter tail gas treating unit (16) through purifying, dry, compression condensation and separate after, obtain highly purified carbon dioxide.
2. the low energy consumption oxygen-enriched combustion system of the empty point technology of coupled solar as claimed in claim 1 and chemical chain, is characterized in that, also comprises cryogenic air separation unit device.
3. the low energy consumption oxygen-enriched combustion system of described coupled solar as claimed in claim 1 and the empty point technology of chemical chain, is characterized in that, the combustion system of described oxygen-enriched burning device is steam-oxygen-enriched combusting.
4. the low energy consumption oxygen-enriched combustion system of the empty point technology of the coupled solar as described in claim 1-3 any one and chemical chain, is characterized in that, described solar thermal collector adopts trough type solar heat-collector.
5. the low energy consumption oxygen-enriched combustion system of the empty point technology of the coupled solar as described in claim 1-4 any one and chemical chain, is characterized in that, the reaction temperature in described oxygen release reactor is 800-1000 DEG C.
6. the low energy consumption oxygen-enriched combustion system of the empty point technology of the coupled solar as described in claim 1-5 any one and chemical chain, is characterized in that, the described carrier of oxygen be in copper metal oxide, manganese metal oxide or cobalt metal oxide any one or mix.
7. the low energy consumption oxygen-enriched combustion system of the empty point technology of the coupled solar as described in claim 1-5 any one and chemical chain, is characterized in that, the described carrier of oxygen be in perovskite, Copper Ores, manganese ore or Copper Ores any one or mix.
8. the low energy consumption oxygen-enriched combustion system of the empty point technology of coupled solar as claimed in claim 6 and chemical chain, is characterized in that, when the described carrier of oxygen is copper metal oxide, the partial pressure of oxygen in oxygen release reactor is 0.0005-0.0430atm.
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