CN105582794A - Solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for coal-fired unit - Google Patents
Solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for coal-fired unit Download PDFInfo
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- CN105582794A CN105582794A CN201610032690.8A CN201610032690A CN105582794A CN 105582794 A CN105582794 A CN 105582794A CN 201610032690 A CN201610032690 A CN 201610032690A CN 105582794 A CN105582794 A CN 105582794A
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- 238000005262 decarbonization Methods 0.000 title abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000010521 absorption reaction Methods 0.000 claims abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims abstract description 7
- 239000003245 coal Substances 0.000 claims description 23
- 238000005261 decarburization Methods 0.000 claims description 14
- 238000004064 recycling Methods 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- 238000006477 desulfuration reaction Methods 0.000 abstract description 5
- 230000023556 desulfurization Effects 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 abstract 2
- 239000012716 precipitator Substances 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 241000838698 Togo Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention provides a solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for a coal-fired unit. The decarbonization and denitrification system comprises a coal-fired power generation system, a denitrification and desulfurization system, a monoethanolamine CO2-absorption system and a solar energy and geothermal energy assisted supercritical CO2 Rankine cycle system, wherein the coal-fired power generation system comprises an economizer, a boiler, a steam turbine, a condenser and a condensate pump which are connected sequentially, and the condensate pump is connected with the economizer; the denitrification and desulfurization system comprises a liquid ammonia evaporator, an ammonia and air mixer, ammonia spray grid equipment, a denitrification reactor, an air preheater, an electric precipitator and a desulfurization system which are connected sequentially, and the ammonia spray grid equipment is connected with the economizer. According to the solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for the coal-fired unit, the liquid ammonia denitrification system, the desulfurization system and a monoethanolamine decarbonization system can remove NOx, SO2 and CO2 in flue gas of the coal-fired unit, and emission reduction of the flue gas of the coal-fired unit is realized.
Description
Technical field
The present invention relates to a kind of coal-fired unit equipment, especially a kind of solar ground heat energy CO2Rankine cycle is auxiliaryCombustion-supporting coal unit decarburization denitrating system.
Background technology
Economic development is regarded as the driving force of environmental change, and along with the development of global economy, energy resource consumption year by yearIncrease, further energy supply pressure, environmental pollution, the climatic deterioration etc. of having strengthened that consume excessively of the energy are askedTopic. " the emission behaviour gap report of environment administration " that United Nations Environment Programme (UNEP) puts into effect for the year ends 2013 refers toGo out, the world is doing very well aspect effort minimizing greenhouse gas emission, even if current weather has been cashed by various countriesPromise to undertake, the discharge capacity of the year two thousand twenty greenhouse gases is probably equivalent to 80 to 12,000,000,000 tons of CO2 equivalents,This will exceed advised World Temperature ascensional range lower than the recommended levels of 2 DEG C. In the face of growing ringBorder crisis, the weather general layout constantly changing, now existing multiple whole world and area agreement solve environmental problem,As Olympic Movement's Agenda 21 (UNCED1992), " Johannesburg action plan " (WSSD2002), " long-rangeTransboundary air pollution pact " (CLRTAP) (UNECE1979) etc. The ecosystem of good function is for canLasting society and economic progress are essential, in order to solve environment, society and economic sustainability problem,Energy consumption structure is all being adjusted in countries in the world, actively seeks to improve the new way of efficiency of energy utilization, carries outRenewable energy utilization technical research, progressively realizes overall goal efficient, energy-conservation, that reduce discharging. At present, energySource structure is just towards science, green, low-carbon (LC) future development. Coal fired power generation unit is CO2, NOx concentrate,Stable emission source, at present carbon trapping technique is mainly taking MEA (MEA) chemical absorption method as main, NOxRemove mainly taking liquid ammonia process for caustic soda purification as main. In the rear decarburization denitrating system of burning, absorbent and reducing agent need to consume greatlyThe heat energy of amount, conventional method is to draw gas as the thermal source of decarburization denitrating system using unit, this economy to unitSafe operation is quite unfavorable. If can be by the CO of after separating2Utilize, and provide energy for decarburization denitrating systemMeasure, can meet the problem of decarburization desorb energy consumption and denitration consumption energy consumption, also can solve CO2RecyclingProblem. So both met the requirement of carbon emission reduction, reached the object of resource circulation utilization, can entirety improveThe economy of system.
Summary of the invention
The invention provides the solar ground heat energy CO that a kind of flue gas of realizing coal-fired unit reduces discharging2Rankine cycleAssistant coal unit decarburization denitrating system.
Realize the solar ground heat energy CO of the object of the invention2Rankine cycle assistant coal unit decarburization denitration systemSystem, comprises coal generating system, denitration desulphurization system, MEA CO2Absorption system, solar energy and groundHeat energy is assisted supercritical CO2Rankine cycle system;
Described coal generating system comprises economizer, boiler, steam turbine, the condenser connecting successively and condensesWater pump, described condensate pump is connected with economizer;
Described denitration desulphurization system comprises connected successively liquid ammonia evaporator, ammonia/air mixer, ammonia sprayPenetrate grid equipment, Benitration reactor, air preheater, electric cleaner and desulphurization system, described ammonia sprays netLattice equipment is connected with economizer;
Described MEA CO2Absorption system comprises connected successively absorption tower, the first solution pump, second moltenLiquid heat exchanger, regenerator, reboiler, be also provided with second molten between described the second solution heat exchanger and regeneratorLiquid pump, is also provided with successively the first solution heat exchanger and mixes between described absorption tower and the second solution heat exchangerDevice, described regenerator is also connected with recycling equipment, and described absorption tower is connected with desulphurization system;
Described solar energy and geothermal energy are assisted supercritical CO2Rankine cycle system comprises the working medium connecting successivelyPump, geothermal energy accessory system, decompressor, heat exchanger and storage tank, described geothermal energy accessory system and decompressorBetween be also connected with the solar thermal collector and the accumulator that are arranged in parallel; On described decompressor, be also connected with generatingMachine, described decompressor is also connected with liquid ammonia evaporator; Described generator respectively with the first solution pump and second moltenLiquid pump, condensate pump and working medium pump are connected; Described storage tank also with liquid ammonia evaporator, regenerator and resource profitConnected with equipment.
Solar ground heat energy CO of the present invention2Rankine cycle assistant coal unit decarburization denitrating system have a beneficial effectFruit is as follows:
(1) solar ground heat energy CO of the present invention2Rankine cycle assistant coal unit decarburization denitrating system,Liquefied ammonia denitrating system, desulphurization system, MEA decarbonization system can complete in coal-fired unit flue gasNOx、SO2、CO2Remove, the flue gas of realizing coal-fired unit reduces discharging.
(2) make full use of the regenerative resource such as geothermal energy, solar energy, reduce Fossil fuel consumption.
(3) make full use of the CO trapping2, make on the one hand its resource transform; Pass through with underground heat on the other handThe supercritical CO that energy, solar energy are thermal source2Rankine cycle, realizes CO2Generating, for whole system provides movingPower source.
(4)CO2The heat that heat exchanger condenses is CO2The desorb of absorbent provides thermal source, improves and draws gas from unitFor absorbent desorb provides the energy-provision way of thermal source.
(5) the high-temperature low-pressure CO after decompressor acting2For liquid ammonia evaporator provides thermal source, make liquefied ammonia evaporationFor ammonia enters into denitrating system, improve from unit and draw gas or electrical heating is the mode of evaporimeter energy supply.
Brief description of the drawings
Fig. 1 is solar ground heat energy CO of the present invention2Rankine cycle assistant coal unit decarburization denitrating systemStructural representation.
Detailed description of the invention
As shown in Figure 1, solar ground heat energy CO of the present invention2Rankine cycle assistant coal unit decarburization denitrationSystem, comprises coal generating system, denitration desulphurization system, MEA CO2Absorption system, solar energy andGeothermal energy is assisted supercritical CO2Rankine cycle system;
Described coal generating system comprises the economizer 1, boiler 2, steam turbine 3, the condenser 4 that connect successivelyAnd condensate pump 5, described condensate pump 5 is connected with economizer 1;
Described denitration desulphurization system comprises connected successively liquid ammonia evaporator 6, ammonia/air mixer 7, ammoniaSpray grid equipment 8, Benitration reactor 9, air preheater 10, electric cleaner 11 and desulphurization system 12,Described ammonia sprays grid equipment 8 and is connected with economizer 1;
Described MEA CO2Absorption system comprise connected successively absorption tower 13, the first solution pump 14,The second solution heat exchanger 15, regenerator 16, reboiler 17, described the second solution heat exchanger 15 and regeneratorBetween 16, be also provided with the second solution pump 18, between described absorption tower 13 and the second solution heat exchanger 15, also comply withInferior the first solution heat exchanger 20 and the blender 19 of being provided with, described regenerator 16 is also connected with recycling and establishesFor 21, described absorption tower 13 is connected with desulphurization system 12;
Described solar energy and geothermal energy are assisted supercritical CO2Rankine cycle system comprises the working medium pump connecting successively22, geothermal energy accessory system 23, decompressor 26, heat exchanger 28 and storage tank 29, the auxiliary system of described geothermal energyBetween system 23 and decompressor 26, be also connected with the solar thermal collector 24 and the accumulator 25 that are arranged in parallel; InstituteState on decompressor 26 and be also connected with generator 27, described decompressor 26 is also connected with liquid ammonia evaporator 6; InstituteState generator 27 respectively with the first solution pump 14 and the second solution pump 18, condensate pump 5 and working medium pump 22Be connected; Described storage tank 29 is also connected with liquid ammonia evaporator 6, regenerator 16 and recycling equipment 21.
Coal generating system connects solar energy and the auxiliary supercritical CO of geothermal energy by condensate pump 52Rankine followsLoop systems connects; Coal generating system is connected with denitration desulphurization system by economizer 1; Denitration desulphurization systemBe connected with decarbonization system by absorption tower 13, by liquid ammonia evaporator 6 and solar energy, geothermal energy-super facingThe CO of boundary2Rankine cycle system connects; Solar energy, geothermal energy-supercritical CO2CO in Rankine cycle system2The water side of heat exchanger 28 is connected to reboiler 17 by pipeline. Liquid ammonia evaporator 6 and discharging from decompressor 26CO2After heat exchange, produce ammonia, ammonia and air in ammonia/air mixer 7, mix after and flue gas viaAmmonia sprays grid equipment 8 and enters Benitration reactor 9, and the flue gas after denitration is through air preheater 10, electric precipitationDevice 11 and desulphurization system 12 enter absorption tower 13. 13 bottoms, absorption tower connect the first solution pump 14, the firstSolution pump connects the entrance of the first solution and the second solution heat exchanger 15, the first solution and the second solution heat exchangeThe outlet of device be connected regenerator 16 and connect, from regenerator high-purity CO out2Be transported to after compression moneySource utilizes equipment 21 and storage tank 29; Regenerator 16 bottoms connect reboiler 17, and working fluid heat exchanger 28 isReboiler provides desorb thermal source to make CO2Absorbent regeneration, the lean solution of high temperature connects through the second solution pump 18To the first solution and the second solution heat exchanger 15, enter absorption through blender 19 and the second solution heat exchanger 20Tower again with denitration desulfurization after smoke reaction complete and recycle. Solar energy and geothermal energy are auxiliary overcriticalCO2Working medium CO in Rankine cycle system2Promote decompressor 26 actings and drive generator 27 to generate electricity, in order to provideThe power consumption of each equipment in whole system.
The present invention is made up of four systems: coal generating system, denitration desulphurization system, MEA CO2InhaleReceipts system, solar energy and geothermal energy are assisted supercritical CO2Rankine cycle system. By economizer and spray ammonia netLattice equipment, couples together coal generating system and denitration desulphurization system. By desulphurization system and absorption tower,By denitration desulphurization system and MEA CO2Absorption system couples together. Pass through CO2Heat exchanger and reboiler,By solar energy and the auxiliary supercritical CO of geothermal energy2Rankine cycle system and MEA CO2Absorption system connectsGet up. By decompressor and liquid ammonia evaporator, by solar energy and the auxiliary supercritical CO of geothermal energy2Rankine cycleSystem and denitration desulphurization system couple together. Above-mentioned connection has realized the combination of four systems. By upperState and connected and composed based on solar energy and the auxiliary supercritical CO of geothermal energy2The decarburization of Rankine cycle assistant coal unitThe system and device of denitration.
Swollen by solar energy and geothermal energy Rankine cycle system of the thermal source of liquid ammonia evaporator in denitration desulphurization systemSwollen machine exhaust provides, and improve by unit and draw gas or electrical heating provides the energy-provision way of thermal source for liquid ammonia evaporator,Reduce unit coal consumption, improved unit economy and security.
In decarbonization system, the desorb thermal source of absorbent is carried by the heat exchanger of solar energy, geothermal energy Rankine cycle systemConfession, improves and is drawn gas the energy-provision way of thermal source is provided for reboiler by unit, has reduced unit coal consumption, has improvedUnit economy and security.
The CO that solar energy, geothermal energy Rankine cycle system utilize decarbonization system to trap2As working medium, realShow CO2Recycling, be conducive to slow down greenhouse effects.
Solar energy, geothermal energy Rankine cycle system institute electricity can be whole system that supply of electric power is provided.
Embodiment recited above is described the preferred embodiment of the present invention, not to thisBright scope limits, and designs under spiritual prerequisite the common engineering people in this area not departing from the present inventionVarious distortion and improvement that member makes technical solution of the present invention, all should fall into claims of the present invention trueIn fixed protection domain.
Claims (1)
1. solar ground heat energy CO2Rankine cycle assistant coal unit decarburization denitrating system, is characterized in that:Comprise coal generating system, denitration desulphurization system, MEA CO2Absorption system, solar energy and geothermal energyAuxiliary supercritical CO2Rankine cycle system;
Described coal generating system comprises economizer, boiler, steam turbine, the condenser connecting successively and condensesWater pump, described condensate pump is connected with economizer;
Described denitration desulphurization system comprises connected successively liquid ammonia evaporator, ammonia/air mixer, ammonia sprayPenetrate grid equipment, Benitration reactor, air preheater, electric cleaner and desulphurization system, described ammonia sprays netLattice equipment is connected with economizer;
Described MEA CO2Absorption system comprises connected successively absorption tower, the first solution pump, second moltenLiquid heat exchanger, regenerator, reboiler, be also provided with second molten between described the second solution heat exchanger and regeneratorLiquid pump, is also provided with successively the first solution heat exchanger and mixes between described absorption tower and the second solution heat exchangerDevice, described regenerator is also connected with recycling equipment, and described absorption tower is connected with desulphurization system;
Described solar energy and geothermal energy are assisted supercritical CO2Rankine cycle system comprises the working medium connecting successivelyPump, geothermal energy accessory system, decompressor, heat exchanger and storage tank, described geothermal energy accessory system and decompressorBetween be also connected with the solar thermal collector and the accumulator that are arranged in parallel; On described decompressor, be also connected with generatingMachine, described decompressor is also connected with liquid ammonia evaporator; Described generator respectively with the first solution pump and second moltenLiquid pump, condensate pump and working medium pump are connected; Described storage tank also with liquid ammonia evaporator, regenerator and resource profitConnected with equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610032690.8A CN105582794A (en) | 2016-01-19 | 2016-01-19 | Solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for coal-fired unit |
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| CN201610032690.8A CN105582794A (en) | 2016-01-19 | 2016-01-19 | Solar energy and geothermal energy assisted CO2 Rankine cycle assisted decarbonization and denitrification system for coal-fired unit |
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| CN107587984A (en) * | 2017-10-16 | 2018-01-16 | 河北工程大学 | A kind of cooling heating and power generation system based on regenerative resource |
| CN107630727A (en) * | 2017-09-27 | 2018-01-26 | 天津大学 | A kind of generating of middle low temperature heat energy driving, refrigeration and carbon trapping coupled system |
| CN110404387A (en) * | 2019-06-19 | 2019-11-05 | 河北工程大学 | Solar energy assisted coal fired unit CO2Resource utilization system and device |
| CN112705029A (en) * | 2020-11-30 | 2021-04-27 | 河北工程大学 | Coal fired power plant carbon dioxide recycling auxiliary agriculture integrated utilization system |
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