CN201235280Y - Apparatus for removing CO2 from flue gas with high-activity kalium based absorbing agent and dry method - Google Patents
Apparatus for removing CO2 from flue gas with high-activity kalium based absorbing agent and dry method Download PDFInfo
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- CN201235280Y CN201235280Y CNU2008200376005U CN200820037600U CN201235280Y CN 201235280 Y CN201235280 Y CN 201235280Y CN U2008200376005 U CNU2008200376005 U CN U2008200376005U CN 200820037600 U CN200820037600 U CN 200820037600U CN 201235280 Y CN201235280 Y CN 201235280Y
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- flue gas
- reactor
- carbonation
- tube type
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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Abstract
The utility model provides a device which utilizes potassium based absorbent with high activity to remove CO2 in flue gas through a dry method. The device is composed of a water vapor generator 1, a gas mixer 2, a booster fan3, a carbonation reactor 4, an embedded pipe type radiator 5, a material circulating device 1 6, a material circulating device II 7, a regenerative reactor 8, an embedded pipe type heater 9, a water vapor condenser 10 and a circulating fan 11. Wherein heat of the water vapor generator is supplied by exhausted steam residual heat of a steam turbine of a power plant, carbonation reactions adopt air pipe embedding to solve heat-dissipation problems, the heat of regenerative actions is supplied by hot flue gas which is generated by a boiler, all reactors adopt an operation mode of circulating fluidized beds which are beneficial for mixing materials and distributing temperature evenly, and generated CO2 is circulated as fluidizing agent of the regenerative reactor. The device is organically combined with a coal-fired power generation system and utilizes coal-fired flue gas to provide energy which is demanded by the system, the CO2 removing efficiency is high, and the device is an optimum scheme with lower investment and energy consumption.
Description
Technical field
The utility model relates to CO in the flue gas that combustion of fossil fuel produces
2Remove and method for concentration CO in especially a kind of employing highly active potassium-base absorbing agent dry removal flue gas
2Device.Belong to collecting carbonic anhydride and emission-reduction technology field.
Background technology
Carbon dioxide is a kind of typical " greenhouse effects " gas.Because its discharge capacity is huge, and is ever-increasing trend, its influence that earth temperature near the ground is raise becomes increasingly conspicuous and has become the hot issue that the whole world is paid close attention to.The use of fossil fuels such as coal, oil, natural gas is CO
2The main source of isothermal chamber effect gas.According to statistics, 2006 annual coal in China consumption account for 69.7% of total energy consumption.From the formation of China's primary energy oil in place, the price of primary energy and the aspects such as strategic security of the energy, China with the coal be the general layout of main energy sources with long-term existence, and wherein the coal consumption of power industry accounts for the largest percentage.At present, the producing coal of China about 50% is used for generating, and thermal power generation accounts for 78% of gross generation.The coal-burning power plant becomes combustion of fossil fuel and utilizes field CO
2Discharge capacity maximum, the most concentrated place.But for power industry, CO
2The research that reduces discharging only is in the starting stage, does not also have so far effectively to remove CO
2And the technology that investment and operating cost are moderate.Therefore, research and development are applicable to the CO of coal-burning power plant
2Emission-reduction technology has crucial strategic importance.
The various CO that studying at present
2In the emission-reduction technology, alkali metal base absorbant dry removal CO
2Technology (belonging to burning back trapping technique), because its carbonating temperature is low, the regenerative response less energy consumption, absorbent is difficult for inactivation, the cyclic utilization rate height, light to equipment corrosion, advantages such as non-secondary pollution begin to cause people's attention.
U.S. Louisiana State University, Research Triangle Institute and Church ﹠amp; Dwight has carried out alkali carbonate (Na under the subsidy of DOE
2CO
3, K
2CO
3) dry removal CO
2Study on Technology, and applied for United States Patent (USP): 6387337B1 (2002.5.14.), 6280503B1 (2001.8.28.) etc.Korea S Kyungpook National University, Yeungnam University, Korea ElectricPower Research Institute has also carried out relevant research with Korea Institute of Energy Research under the subsidy of the Korea S Ministry of Science and Technology " 21st Century Frontier Programs ".Korea Electric Power has applied for patent in China: CN200410101564.0, at U. S. application patent: USP20060148642.Need to prove that above-mentioned patent is all at absorbent and preparation method thereof, about CO
2The patent that removes device and process yet there are no report.Southeast China University had also carried out relevant research work at this technology in recent years, and was applying for the national inventing patent of relevant highly active potassium-base absorbing agent.
Highly active potassium-base absorbing agent that Southeast China University develops with hexagonal crystal system potash as active component, this material and CO
2Reaction rate is faster more than 10 times than the sodium carbonate or the monoclinic system potash of RTI or Korea Electric Power's research; As carrier material, it is cheap and easy to get, has load capacity and fluidization characteristic preferably with active carbon or silochrom.This absorbent regeneration is functional, the cyclic utilization rate height.
Alkali metal base absorbant dry removal CO
2Technology realizes CO by following 2 main chemical reactions
2Remove and concentrate:
Carbonation reaction: M
2CO
3(s)+CO
2(g)+H
2O (g) → 2MHCO
3(s) (1)
Regenerative response: 2MHCO
3(s) → M
2CO
3(s)+CO
2(g)+H
2O (g) (2)
(M is Na or K)
Wherein, the carbonation reaction temperature is 50-80 ℃, and the regenerative response temperature is 150-250 ℃.Carbonation reaction is high exothermic reaction, can't in time scatter and disappear as the heat in the carbonation reactor, will cause the temperature of carbonation reaction system to raise, and until exceeding the optimal reaction temperature district, thereby influences normally carrying out of carbonation reaction.Therefore, must consider to take that adequate measures are kept evenly, reaction temperature normally during carbonation reactor in design.And regenerative response is the endothermic reaction, is necessary for it stable thermal source is provided, with normally carrying out of guaranteeing to react; On the other hand, because regenerative response is temperature required lower, if can adopt more low-grade thermal source to be its heat supply, can effectively improve the heat-economy of system, this also is the key technical problem that the present invention will put forth effort to solve.The required additional water vapour amount of carbonation reaction is limited, and rationally utilizing the low-grade heat source in power plant's boiler circuit and effectively simplifying the water vapour generation systems is another technological difficulties of solution required for the present invention.Be the heat transfer coefficient between solid material and heating medium in effective raising regeneration reactor, adopting circulating fluid bed reactor is a desirable selection, is the CO that guarantees finally to trap
2The purity of gas, the choose reasonable of regeneration reactor fluidizing agent are also very important.
Summary of the invention
Technical problem: the utility model aims to provide CO in a kind of highly active potassium-base absorbing agent dry removal flue gas
2Device.This device organically combines with coal generating system, utilizes coal-fired flue-gas that institute of system energy requirement is provided, and is investment and the lower a kind of prioritization scheme of energy consumption.
Technical scheme: CO in the highly active potassium-base absorbing agent dry removal flue gas of the present utility model
2Device form by steam generator, gas mixer, booster fan, carbonation reactor, buried tube type radiator, material circulation device, regeneration reactor, buried tube type heater, water vapour condenser and circulating fan etc.
Described steam generator institute calorific requirement is provided by power plant's steam turbine steam discharge, and the steam turbine steam discharge returns the boiler circuit of power plant behind condensation heat.
The buried tube type radiator is set in carbonation reactor, and the heat-absorbing medium in the buried tube type radiator is the cold air from boiler blower, and cold air is sent in the air preheater of boiler after absorbing heat in the buried tube type radiator and heating up again.Described carbonation reactor and regeneration reactor are the recirculating fluidized bed mode of operation.
The buried tube type heater is set in regeneration reactor, and the partial fume of the heating flue gas that feeds in the buried tube type heater for being drawn by the boiler economizer outlet mixes with flue gas behind the partial desulfurization; Flue gas after the pipe laying cooling is introduced desulfurizing tower again and is carried out desulfurization.Regeneration reactor adopts the high-purity CO that produces in the flue gas processing procedure
2As fluidizing agent.
CO in the highly active potassium-base absorbing agent dry removal flue gas of the present utility model
2Technological process be: the flue gas after the desulfurization mixes back (the enough carbonation reaction needs of content of water vapour in the flue gas after handling as desulfurization with a certain amount of water vapour, then steam generator can be set) send into carbonation reactor by booster fan, in reactor, react, with the CO in the flue gas with highly active potassium-base absorbing agent
2Remove; Reacted absorbent enters regeneration reactor through material circulation device I, and behind thermal regeneration, it is recycling to return carbonation reactor through material circulation device II.The CO that regenerative response produces
2With the water vapor mixture body after condenser condenses dehydration, obtain high-purity CO
2, a part is sent into regeneration reactor as fluidizing agent by circulating fan, remainingly carries out collection and treatment.
The required additional water vapour of carbonation reaction provides (the enough carbonation reaction needs of content of water vapour in the flue gas after handling as desulfurization by the steam generator of special setting, then steam generator can be set), steam generator institute calorific requirement is provided by power plant's steam turbine steam discharge, on the turbine discharge pipeline, bypass is set, draw a part of low-pressure steam and after flow regulator transfers to required flow, introduce steam generator, return the boiler circuit of power plant behind the condensation heat.The water vapour that steam generator produces is introduced gas mixer, mixes with flue gas after the desulfurization.
Carbonation reactor adopts circulating fluid bed reactor, evenly arranges the buried tube type radiator at the emulsion zone of carbonation reactor, and the heat-absorbing medium in the pipe laying is the cold air from boiler blower.In boiler blower and being connected of air preheater bypass is set on the air channel, in flow regulator was sent into the buried tube type radiator, sent in the air preheater of boiler after absorbing heat in pipe laying and heating up again by air by bypass for the part cold air.Can effectively utilize the reaction heat that produces in the carbonation reaction process like this, further improve the economy of system.
Regeneration reactor adopts the recirculating fluidized bed mode of operation equally.Arrange the buried tube type heater in the regeneration reactor, feed heating in the pipe laying and use flue gas, for regenerative response provides institute's calorific requirement.Heating with flue gas for export the flue gas of about 400 ℃ of the parts draw by boiler economizer, mix with the flue gas about 100 ℃ behind the partial desulfurization, distribute by Flow-rate adjustment, control to temperature required back and feed pipe laying, the flue gas after the pipe laying cooling is introduced desulfurizing tower again and is carried out desulfurization.
Two cover material circulation devices are set, respectively with CO absorption between carbonation reactor and the regeneration reactor
2After absorbent send into regeneration reactor by carbonation reactor, with regeneration after adsorbent send into carbonation reactor by regeneration reactor.
Beneficial effect: CO in the highly active potassium-base absorbing agent dry removal flue gas of the present utility model
2Device have the following advantages:
1, CO in the highly active potassium-base absorbing agent dry removal flue gas
2The CO of technology
2The removal efficiency height, the required energy consumption of system is low, and equipment and operating cost are lower, are efficient, energy-conservation, economic prioritization schemes.
2, the required additional water vapour of carbonation reaction provides (the enough carbonation reaction needs of content of water vapour in the flue gas after handling as desulfurization by the steam generator of special setting, then steam generator can be set), steam generator institute calorific requirement is provided by power plant's steam turbine steam discharge.Effectively utilize the waste heat of steam turbine steam discharge, improved the economy of system's operation.
3, adopt air pipe laying radiator to solve the heat dissipation problem of carbonation reaction, can in time take away the heat that reaction produces, it is constant that reactor temperature is kept, and guarantees that carbonation reaction normally carries out; The reaction heat that carbonation reaction produces is utilized effectively, and has improved the economy of system's operation.
4, carbonation reactor and regeneration reactor all adopt the recirculating fluidized bed mode of operation, make the interior mixing of materials of reactor abundant, uniformity of temperature profile, helping reaction carries out, also make the material circulation between carbonation reactor and the regeneration reactor realize easily, effectively simplified system, reduced investment outlay and operating cost.
5, regenerative response institute calorific requirement is provided by the hot flue gas that boiler produces fully, has effectively simplified system, reduces investment outlay and operating cost and improved the heat-economy of system.
6, adopt CO
2As the fluidizing agent of regeneration reactor, under the prerequisite that realizes the operation of regeneration reactor recirculating fluidized bed, solved and guaranteed regeneration reactor exhaust CO
2The problem of purity.
Description of drawings
Fig. 1 is a structural representation of the present utility model.Wherein have: steam generator 1, gas mixer 2, booster fan 3, carbonation reactor 4, buried tube type radiator 5, material circulation device I 6, material circulation device II 7, regeneration reactor 8, buried tube type heater 9, water vapour condenser 10 and circulating fan 11.A is a flue gas after desulfurization; B is the steam that draws from power plant's steam turbine; C is the condensate water after the heat exchange; The aqueous water of D for feeding; The steam of E for producing; F is a boiler blower; G is the cold air of directly sending into air preheater that boiler blower produces; The air of H for absorbing heat after heating up; I is for removing CO
2After flue gas; J is the high-temperature flue gas that draws from the boiler economizer outlet; K is a condensed water; The high-purity CO of L for carrying out collection and treatment
2M is cooling back flue gas.
The specific embodiment
This device is made up of steam generator 1, gas mixer 2, booster fan 3, carbonation reactor 4, buried tube type radiator 5, material circulation device I 6, material circulation device II 7, regeneration reactor 8, buried tube type heater 9, water vapour condenser 10 and circulating fan 11; Wherein, the water vapour output termination gas mixer 2 of steam generator 1, the output of gas mixer 2 connects the bottom of carbonation reactor 4 by booster fan 3, the middle part of carbonation reactor 4 connects the top of material circulation device I6, and the bottom of material circulation device I6 connects the bottom of regeneration reactor 4 by dipleg; The middle part of regeneration reactor 8 meets material circulation device II7, the bottom that dipleg connects carbonation reactor 8 was connected in the bottom of material circulation device II 7, the gas output end water receiving stram condenser 10 of regeneration reactor 8, the output of water vapour condenser 10 connects the bottom of regeneration reactor 8 by circulating fan 11.
CO in the highly active potassium-base absorbing agent dry removal flue gas
2Device be applied to the CO of coal-fired plant flue gas
2Remove and concentrate.Package unit places after the desulfurizing tower.Flue gas after the desulfurization mixes as the regeneration reactor thermal source except that the hot flue gas of small part with about 400 ℃ of the parts of being drawn by the boiler economizer outlet, and all the other feed carbonation reactor and carry out decarburization.The temperature of flue gas after desulfurization generally about 100 ℃, is removed and is contained N
2, O
2Outside the part water vapour, contain 10%～20% the CO of having an appointment
2For guaranteeing that carbonation reaction fully carries out, must there be the water vapour of identical More's number to exist, the content of water vapour is enough in the flue gas after handling as desulfurization, then steam generator can be set, otherwise need set up steam generator.Steam generator institute calorific requirement is provided by power plant's steam turbine steam discharge, on the turbine discharge pipeline, bypass is set, draw a part of low-pressure steam and after flow regulator transfers to required flow, introduce steam generator, return power plant's boiler circuit behind the condensation heat.The water vapour that steam generator produces is introduced gas mixer, mixes with flue gas after the desulfurization.
Mixed flue gas is sent into carbonation reactor by booster fan, and loading an amount of particle diameter in the carbonation reactor is the graininess highly active potassium-base absorbing agent of 0.5mm～1mm.Temperature of reactor maintains between 60 ℃～80 ℃, and this is its optimal reaction temperature scope.CO in the flue gas
2In reactor, react CO with water vapour with highly active potassium-base absorbing agent
2Removal efficiency can be near 100%.Carbonation reactor adopts circulating fluid bed reactor, and fluidizing agent is for need take off CO
2Mixed flue gas, it is sent into from the bottom of carbonation reactor, realizes CO when guaranteeing the normal fluidisation of highly active potassium-base absorbing agent
2Remove.Highly active potassium-base absorbing agent fully mixes with flue gas in carbonation reactor and carries out carbonation reaction, reaction produces heat and is taken away by the buried tube type radiator of evenly arranging at the reactor emulsion zone, and the heat-absorbing medium in the pipe laying is the cold air from boiler blower.In boiler blower and being connected of air preheater the bypass air channel is set on the air channel, by the bypass air channel with the part cold air in flow regulator is sent into the buried tube type radiator, air is sent in the air preheater of boiler after absorbing heat in pipe laying and heating up again.Can effectively utilize the reaction heat that produces in the carbonation reaction process like this, further improve the economy of system.
Remove CO
2After flue gas directly enter atmosphere through flue and chimney.Reacted absorbent granules enters regeneration reactor through material circulation device I.Regenerate after adding thermal decomposition in regeneration reactor, it is recycling to return carbonation reactor through material circulation device II.The CO that regenerative response produces
2With the mist of water vapour after the condenser condenses dehydration, can obtain purity greater than 99% CO
2, high-purity CO
2A part is sent into regeneration reactor as fluidizing agent by circulating fan, remainingly carries out collection and treatment.
Regeneration reactor adopts the recirculating fluidized bed mode of operation.Arrange the buried tube type heater in the regeneration reactor, feed heating in the pipe laying and use flue gas, for regenerative response provides institute's calorific requirement.Heating with flue gas for export the flue gas of about 400 ℃ of the parts draw by boiler economizer, mix with the flue gas about 100 ℃ behind the partial desulfurization, distribute by Flow-rate adjustment, control to temperature required back and feed pipe laying, the flue gas after the pipe laying cooling is introduced desulfurizing tower again and is carried out desulfurization.
Two cover material circulation devices are set, respectively with CO absorption between carbonation reactor and the regeneration reactor
2After absorbent send into regeneration reactor by carbonation reactor, with regeneration after adsorbent send into carbonation reactor by regeneration reactor.
Claims (6)
1, CO in a kind of highly active potassium-base absorbing agent dry removal flue gas
2Device, it is characterized in that this device is made up of steam generator (1), gas mixer (2), booster fan (3), carbonation reactor (4), buried tube type radiator (5), material circulation device I (6), material circulation device II (7), regeneration reactor (8), buried tube type heater (9), water vapour condenser (10) and circulating fan (11); Wherein, the water vapour output termination gas mixer (2) of steam generator (1), the output of gas mixer (2) connects the bottom of carbonation reactor (4) by booster fan (3), the middle part of carbonation reactor (4) connects the top of material circulation device I (6), and the bottom of material circulation device I (6) connects the bottom of regeneration reactor (4) by dipleg; The middle part of regeneration reactor (8) meets material circulation device II (7), the bottom that dipleg connects carbonation reactor (8) was connected in the bottom of material circulation device II (7), the gas output end water receiving stram condenser (10) of regeneration reactor (8), the output of water vapour condenser (10) connect the bottom of regeneration reactor (8) by circulating fan (11).
2, CO in the highly active potassium-base absorbing agent dry removal flue gas according to claim 1
2Device, it is characterized in that described steam generator (1) institute calorific requirement is provided by power plant's steam turbine steam discharge, the steam turbine steam discharge returns the boiler circuit of power plant behind condensation heat.
3, CO in the highly active potassium-base absorbing agent dry removal flue gas according to claim 1
2Device, it is characterized in that in carbonation reactor (4), the buried tube type radiator being set, heat-absorbing medium in the buried tube type radiator is the cold air from boiler blower, and cold air is sent in the air preheater of boiler after absorbing heat in the buried tube type radiator and heating up again.
4, CO in the highly active potassium-base absorbing agent dry removal flue gas according to claim 1
2Device, it is characterized in that described carbonation reactor (4) and regeneration reactor (8) are the recirculating fluidized bed mode of operation.
5, CO in the highly active potassium-base absorbing agent dry removal flue gas according to claim 1
2Device, it is characterized in that in regeneration reactor (8), the buried tube type heater being set, the heating flue gas that feeds in the buried tube type heater mixes with flue gas behind the partial desulfurization for exporting the partial fume of drawing by boiler economizer; Flue gas after the pipe laying cooling is introduced desulfurizing tower again and is carried out desulfurization.
6, CO in the highly active potassium-base absorbing agent dry removal flue gas according to claim 1
2Device, it is characterized in that described regeneration reactor (8) adopts the high-purity CO that produces in the flue gas processing procedure
2As fluidizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200376005U CN201235280Y (en) | 2008-06-17 | 2008-06-17 | Apparatus for removing CO2 from flue gas with high-activity kalium based absorbing agent and dry method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200376005U CN201235280Y (en) | 2008-06-17 | 2008-06-17 | Apparatus for removing CO2 from flue gas with high-activity kalium based absorbing agent and dry method |
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|---|---|
| CN201235280Y true CN201235280Y (en) | 2009-05-13 |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010045875A1 (en) * | 2008-10-24 | 2010-04-29 | Di Dan | Method and apparatus for concentrating and reclaiming of carbon dioxide in the flue gas |
| CN101298023B (en) * | 2008-06-17 | 2010-12-22 | 东南大学 | Device for removing CO2 of flue gas by highly active potassium-base absorbing agent dry method and method thereof |
| CN106824094A (en) * | 2017-02-28 | 2017-06-13 | 南京师范大学 | One kind is using modified gangue removing power-plant flue gas CO2System and its implementation |
-
2008
- 2008-06-17 CN CNU2008200376005U patent/CN201235280Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298023B (en) * | 2008-06-17 | 2010-12-22 | 东南大学 | Device for removing CO2 of flue gas by highly active potassium-base absorbing agent dry method and method thereof |
| WO2010045875A1 (en) * | 2008-10-24 | 2010-04-29 | Di Dan | Method and apparatus for concentrating and reclaiming of carbon dioxide in the flue gas |
| CN106824094A (en) * | 2017-02-28 | 2017-06-13 | 南京师范大学 | One kind is using modified gangue removing power-plant flue gas CO2System and its implementation |
| CN106824094B (en) * | 2017-02-28 | 2019-06-14 | 南京师范大学 | It is a kind of to remove power-plant flue gas CO using modified gangue2System and its implementation method |
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Granted publication date: 20090513 Termination date: 20160617 |
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