CN208423065U - CO2The integral coal gasification fuel cell generation of near-zero release - Google Patents
CO2The integral coal gasification fuel cell generation of near-zero release Download PDFInfo
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- CN208423065U CN208423065U CN201820439557.9U CN201820439557U CN208423065U CN 208423065 U CN208423065 U CN 208423065U CN 201820439557 U CN201820439557 U CN 201820439557U CN 208423065 U CN208423065 U CN 208423065U
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Abstract
CO2The integral coal gasification fuel cell system of near-zero release, Tthe utility model system realize CO in the coal gasified fuel battery generating system based on high-temperature fuel cell2Trapping, enables to the CO of system2Discharge amount reduce by 95% or more, substantially increase the environmental protection characteristic of coal gasified fuel battery generating system, pass through the recycling of anode outlet gases simultaneously, the fuel availability and generating efficiency of raising system, generating efficiency reaches 50% or more, so as to realize that the clean and effective low-carbon of coal resources utilizes.
Description
Technical field
The utility model belongs to technical field of power generation more particularly to a kind of CO2The integral coal gasification fuel electricity of near-zero release
Cell system.
Background technique
Coal is the most important non-renewable energy in China, and fundamental position of the coal in China's energy resource structure is in quite long-term
It is interior to change.In recent years, it as China's Energy situation is increasingly serious and environmental protection pressure persistently increases, arranges carbon dioxide is reduced
Put, clean and effective using coal resources demand it is more more and more urgent, Coal Clean efficient technique of rainwater utilization innovation be China's " energy skill
Art revolution innovate action plan (2016-2030) " important content.Producing synthesis gas from coal is that a kind of Coal Clean of low cost is efficient
By in the way of, synthesis gas further passes through fuel cell efficiency power generation, and it is more that the flexible coal-based power generation of clean and effective may be implemented
Coproduction is the fundamental change of coal-based power generation, becomes the hot spot that 21 century various countries are competitively studied.
The coal gasified fuel cell power generation technology developed on the basis of integrated gasification combined cycle for power generation (IGCC)
(IGFC), it can be achieved that coal-based power generation is generated electricity from simple thermodynamic cycle to the technological leapfrogging of electrochemistry and thermodynamic cycle compound power-generating,
Coal electrical efficiency is greatly improved, pollutant near-zero release and load quick response is can be realized while efficiency power generation, is considered
The following most promising near-zero release coal gasification power generation technology.
High-temperature fuel cell in fuel cell, including molten carbonate fuel cell (Molten Carbonate Fuel
Cell, MCFC) and solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC).For MCFC, due to needing
CO2With the oxygen in air as oxidant, CO2CO is converted into MCFC cathode catalysis with oxygen3 2-, CO3 2-Pass through electrolyte
Layer reaches anode and H2It is reacted with CO and generates water and CO2, this process can utilize the CO in coal-fired plant flue gas2, by CO2It is dense
Contracting reaches CO2The purpose of enrichment and capture.For SOFC, cathode uses air, and anode uses hydrocarbon fuel, realize fuel and
The separation of oxidant can realize CO in anode2Enrichment.Therefore, CO is further realized on the basis of IGFC system2Trapping,
Be conducive to push the development of low-carbon economy.In China, the current energy under the new situation, develops efficient, low-carbon, cleaning, flexible IGFC
Generation technology is to guarantee Chinese energy safety and the sustainable development of coal fired power generation industry is promoted to have very important significance.
Summary of the invention
The purpose of this utility model is to provide a kind of CO2The integral coal gasification fuel cell generation of near-zero release,
The utility model realizes CO in the IGFC based on high-temperature fuel cell2Trapping, enables to the CO of system2Discharge amount drop
Low 95% or more, the environmental protection characteristic of IGFC system is substantially increased, while by the recycling of anode outlet gases, improving system
Fuel availability and generating efficiency, generating efficiency reach 50% or more, the clean and effective so as to realize coal resources is low
Carbon utilizes.
In order to achieve the above object, the utility model adopts the following technical solution:
A kind of CO2The integral coal gasification fuel cell generation of near-zero release, including air separation unit 1, air separation unit 1
Entrance is passed through air, and the first nitrogen outlet of air separation unit connects the nitrogen inlet of pulverized coal conveying device 2, and the second of air separation unit 1
Nitrogen outlet connects nitrogen storage device 3, and the oxygen outlet of air separation unit 1 connects the oxygen intake of gasification furnace 4；Pulverized coal conveying device 2
Coal powder entrance be passed through coal dust, the outlet of pulverized coal conveying device 2 connects the coal powder entrance of gasification furnace 4；The steam inlet of gasification furnace 4 connects
First steam (vapor) outlet of separator 5, the synthesis gas entrance of the syngas outlet connection waste-heat recovery device 6 of gasification furnace 4；Waste heat returns
The feed-water intake of receiving apparatus 6 is passed through water, and the steam (vapor) outlet of waste-heat recovery device 6 connects the steam inlet of separator 5, waste heat recycling dress
The syngas outlet for setting 6 connects the entrance of dust-extraction unit 7；The outlet of dust-extraction unit 7 connects the entrance of desulfurizer 8；Desulfurizer 8
Outlet connects the synthesis gas first entrance of ejector 9；The outlet of ejector 9 meets CO2The entrance of purifying plant 10, the H of ejector 92With
CO entrance connects the outlet of condenser 12；CO2The H of purifying plant 102, CO and the outlet CH meet the H of fuel humidifier 112With CO entrance,
CO2The CO of purifying plant 102Outlet connects separator 13, CO2Exhaust gas is externally discharged in the waste gas outlet of purifying plant 10；Fuel humidification
The steam inlet of device 11 connects the second steam (vapor) outlet of separator 5, and the outlet of fuel humidifier 11 connects the low temperature of First Heat Exchanger 14
Gas access；The cryogenic gas outlet of First Heat Exchanger 14 connects the anode inlet of high-temperature fuel cell 15；High-temperature fuel cell 15
Anode export connect the high-temperature gas entrance of the second heat exchanger 16, the high-temperature gas outlet of the second heat exchanger 16 connects condenser 12
Entrance；The air intake of blower 17 is passed through air, and the outlet of blower 17 connects the first entrance of mixer 18；Separator 13
First outlet connects the second entrance of mixer 18, and the second outlet of separator 13 connects the entrance of compresses and liquefies separation device 19, compresses liquid
19 outlet output liquid CO is set in makeup2；The outlet of mixer 18 connects the cryogenic gas entrance of third heat exchanger 20, third heat exchange
The cryogenic gas outlet of device 20 connects the cryogenic gas entrance of the second heat exchanger 16, and the cryogenic gas outlet of the second heat exchanger 16 connects height
The cathode inlet of temp fuel battery 15, the cathode outlet of high-temperature fuel cell 15 connect the high-temperature gas entrance of First Heat Exchanger 14,
The high-temperature gas outlet of First Heat Exchanger 14 connects the high-temperature gas entrance of third heat exchanger 20, the High Temperature Gas of third heat exchanger 20
Body outlet externally scavenges；Electrochemical reaction occurs in high-temperature fuel cell 15 and generates direct current, DC supply input to DC/AC
Converter 21, DC/AC converter 21 externally export alternating current.
The air separation unit 1 by Deep Cooling Method by air oxygen and nitrogen separate, oxygen is transported to gasification
In furnace 4.
The pulverized coal conveying device 2, using N2As conveying gas, coal dust is transported to by gasification furnace 4 by boosting lock hopper
In.
Reaction generates synthesis gas in the gasification furnace 4, and it is H that synthesis gas, which mainly becomes,2、H2O、 CO、CO2、CH4、N2、H2S and
COS。
The waste-heat recovery device 6 recycles the heat in synthesis gas, and producing steam by waste heat boiler.
The dust-extraction unit 7 uses ceramic filter, the particulate matter in synthesis gas is removed, so that mine dust content is less than
10mg/Nm3。
The desulfurizer 8 washes method or NHD method using low-temp methanol, so that exit H2S and COS content is less than 1ppm.
The CO2Purifying plant 10 washes method or Deep Cooling Method using pressure swing adsorption method, MDEA method, low-temp methanol, and separation is closed
At the CO in gas2, CO2Concentration be higher than 99%, the H in separating synthetic gas2, CO and CH4, residual gas excluded as exhaust gas be
It unites, the main component in exhaust gas is N2。
The fuel humidifier 11, using steam mixing method, some vapor and H that waste-heat recovery device 6 is generated2、CO
And CH4It is mixed, improves fuel wherein H2The content of O, so that H2Molar content > 10% of O.
The high-temperature fuel cell 15 is made of anode, cathode, electrolyte membrance, cathode and anode respectively electrolyte every
Film two sides, fuel and oxidant are each led into anode and cathode chamber, and electrochemical reaction occurs, and are produced electricl energy and hot
Amount, battery operating temperature at 600 DEG C~1000 DEG C, amplified in series and parallel by multiple battery piles by the scale of battery.
The utility model realizes CO before burning in the IGFC based on high-temperature fuel cell2Trapping, enables to system
CO2Discharge amount reduce by 95% or more, substantially increase the environmental protection characteristic of IGFC system, while passing through anode outlet gases
Recycling, improve the fuel availability and generating efficiency of system, generating efficiency reaches 50% or more, so as to realize coal provide
The clean and effective in source utilizes.
Detailed description of the invention
Fig. 1 is that CO before burning can be achieved in the utility model one kind2The signal of the integral coal gasification fuel cell system of trapping
Figure.
1- air separation unit, 2- pulverized coal conveying device, 3- nitrogen storage device, 4- gasification furnace, 5- separator, 6- waste heat return
Receiving apparatus, 7- dust-extraction unit, 8- desulfurizer, 9- ejector, 10-CO2Purifying plant, 11- fuel humidifier, 12- gas trap,
13- separator, 14- First Heat Exchanger, 15- high-temperature fuel cell, the second heat exchanger of 16-, 17- blower, 18- mixer, 19-
Compresses and liquefies separation device, 20- third heat exchanger, 21-DC/AC converter
Specific embodiment
The utility model is described further in the following with reference to the drawings and specific embodiments.
Case study on implementation 1
As shown in Figure 1, the present embodiment high-temperature fuel cell 15 is molten carbonate fuel cell (MCFC).Coal, steam,
Oxygen and nitrogen are passed through gasification furnace 4 and generate synthesis gas, and the temperature of synthesis gas is 1200 DEG C, and group is divided into CO ≈ 67%, H2≈ 25%,
CO2≈ 7%, remaining group are divided into N2、H2S、COS、CH4Impurity gas；Synthesis gas first passes around the heat exchange of waste-heat recovery device 6, temperature drop
Down to 200 DEG C hereinafter, then passing to dust-extraction unit 7, so that particulate matter component is lower than 10mg/Nm3；Then it is passed into desulfurization dress
It sets in 8, so that H2S and COS concentration is lower than 1 ppm；It is passed through in ejector 9 again；CO2Purifying plant 10 passes through Deep Cooling Method for CO2's
Concentration is increased to 99% or more, N2Concentration be increased to 95% or more, remaining gas is as H2, CO and CH4Fuel gas；It is highly concentrated
Spend CO2Gas is divided into two strands of gases, 80% CO by separator 132Gas is passed into compresses and liquefies separation device 19 as liquid
CO2, other 20% CO2It is passed into mixer 18；H2, CO and CH4Fuel gas passes through fuel humidifier 11, so that in gas
H2Then O molar content > 10% makes fuel gas temperature rise to 500 DEG C and then passes to melting carbon by First Heat Exchanger 14
Electrochemical reaction H occurs for the anode of hydrochlorate fuel cell (MCFC)2+CO3 2-=H2O+CO2+e2-, CO+CO3 2-=2CO2+e2-, with
And chemical reaction CO+H2O=CO2+H2, CH4+H2O=CO+3H2, the gas (H of anode export2、CO、H2O、 CO2) it is passed into
In two heat exchangers 16, moisture therein, remaining gas (H then are removed by condenser 122、CO、CO2) pass through ejector 9
In；At the same time, air is forced into 0.2MPa by blower 17, subsequently into mixer 18, is then passed through third heat exchanger
20 and second heat exchanger 16 improve air temperature to 600 DEG C or more, then pass to molten carbonate fuel cell (MCFC) yin
Electrochemical reaction O occurs at cathode for pole chamber2+2CO2+4e-=2CO3 2-, fuel and oxidant are in fused carbonate fuel
Electrochemical reaction occurs in battery (MCFC) and generates direct current, is converted into alternating current by DC/AC converter 21.
Case study on implementation 2
As shown in Figure 1, the present embodiment high-temperature fuel cell 15 is solid oxide fuel cell (SOFC).Coal, steam,
Oxygen and nitrogen are passed through gasification furnace 4 and generate synthesis gas, and the temperature of synthesis gas is 1200 DEG C, and group is divided into CO ≈ 67%, H2≈ 25%,
CO2≈ 7%, remaining group are divided into N2、H2S、COS、CH4Impurity gas；Synthesis gas first passes around the heat exchange of waste-heat recovery device 6, temperature drop
Down to 200 DEG C hereinafter, then passing to dust-extraction unit 7, so that particulate matter component is lower than 10mg/Nm3；Then it is passed into desulfurization dress
It sets in 8, so that H2S and COS concentration is lower than 1 ppm；It is passed through in ejector 9 again；CO2Purifying plant 10 passes through Deep Cooling Method for CO2's
Concentration is increased to 99% or more, N2Concentration be increased to 95% or more, remaining gas is as H2, CO and CH4Fuel gas；It is highly concentrated
Spend CO2Gas is divided into two strands of gases, 100% CO by separator 132Gas is passed into compresses and liquefies separation device 19 as liquid
CO2, 0% CO2It is passed into mixer 18；H2, CO and CH4Fuel gas passes through fuel humidifier 11, so that H in gas2O rubs
That content > 10%, then makes fuel gas temperature rise to 600 DEG C and then passes to soild oxide by First Heat Exchanger 14
Electrochemical reaction H occurs for the anode of fuel cell (SOFC)2+O2-=H2O+e2-, CO+O2-=CO2+e2-, and chemical reaction CO
+H2O=CO2+H2, CH4+H2O=CO+3H2, the gas (H of anode export2、CO、H2O、CO2) be passed into the second heat exchanger 16,
Then moisture therein, remaining gas (H are removed by condenser 122、 CO、CO2) by ejector 9；At the same time, empty
Gas is forced into 0.2 MPa by blower 17, subsequently into mixer 18, is then passed through third heat exchanger 20 and the second heat exchanger
16 improve the temperature of air to 600 DEG C or more, solid oxide fuel cell (SOFC) cathode chamber are then passed to, in cathode
Electrochemical reaction O occurs for place2+4e-=2O2-, electrification occurs in solid oxide fuel cell (SOFC) for fuel and oxidant
It learns and reacts and generate direct current, be converted into alternating current by DC/AC converter 21.
Claims (4)
1. a kind of CO2The integral coal gasification fuel cell generation of near-zero release, it is characterised in that: including air separation unit (1),
The entrance of air separation unit (1) is passed through air, and the first nitrogen outlet of air separation unit connects the nitrogen inlet of pulverized coal conveying device (2),
Second nitrogen outlet of air separation unit (1) connects nitrogen storage device (3), and the oxygen outlet of air separation unit (1) connects gasification furnace (4)
Oxygen intake；The coal powder entrance of pulverized coal conveying device (2) is passed through coal dust, and the outlet of pulverized coal conveying device (2) connects gasification furnace (4)
Coal powder entrance；The steam inlet of gasification furnace (4) connects the first steam (vapor) outlet of separator (5), and the syngas outlet of gasification furnace (4) connects
Connect the synthesis gas entrance of waste-heat recovery device (6)；The feed-water intake of waste-heat recovery device (6) is passed through water, waste-heat recovery device (6)
Steam (vapor) outlet connect the steam inlets of separator (5), the syngas outlet of waste-heat recovery device (6) meets entering for dust-extraction unit (7)
Mouthful；The outlet of dust-extraction unit (7) connects the entrance of desulfurizer (8)；The outlet of desulfurizer (8) connects the synthesis gas of ejector (9)
First entrance；The outlet of ejector (9) meets CO2The entrance of purifying plant (10), the H of ejector (9)2Condenser is connect with CO entrance
(12) outlet；CO2The H of purifying plant (10)2, CO and the outlet CH meet the H of fuel humidifier (11)2With CO entrance, CO2Purification
The CO of device (10)2Outlet meets separator (13), CO2Exhaust gas is externally discharged in the waste gas outlet of purifying plant (10)；Fuel humidifier
(11) steam inlet connects the second steam (vapor) outlet of separator (5), and the outlet of fuel humidifier (11) connects First Heat Exchanger (14)
Cryogenic gas entrance；The cryogenic gas outlet of First Heat Exchanger (14) connects the anode inlet of high-temperature fuel cell (15)；High temperature
The anode export of fuel cell (15) connects the high-temperature gas entrance of the second heat exchanger (16), the high-temperature gas of the second heat exchanger (16)
Outlet connects the entrance of condenser (12)；The air intake of blower (17) is passed through air, and the outlet of blower (17) connects mixer (18)
First entrance；The first outlet of separator (13) connects the second entrance of mixer (18), and the second outlet of separator (13) connects
The outlet of the entrance of compresses and liquefies separation device (19), compresses and liquefies separation device (19) exports liquid CO2；The outlet of mixer (18) connects
The cryogenic gas outlet of the cryogenic gas entrance of third heat exchanger (20), third heat exchanger (20) connects the low of the second heat exchanger (16)
Warm gas access, the cryogenic gas outlet of the second heat exchanger (16) connect the cathode inlet of high-temperature fuel cell (15), high-temperature fuel
The cathode outlet of battery (15) connects the high-temperature gas entrance of First Heat Exchanger (14), the high-temperature gas outlet of First Heat Exchanger (14)
The high-temperature gas entrance of third heat exchanger (20) is connect, the high-temperature gas outlet of third heat exchanger (20) externally scavenges；High temperature
Electrochemical reaction occurs in fuel cell (15) and generates direct current, DC supply input to DC/AC converter (21), DC/AC conversion
Device (21) externally exports alternating current.
2. CO according to claim 12The integral coal gasification fuel cell generation of near-zero release, it is characterised in that: institute
Stating waste-heat recovery device (6) uses waste heat boiler to recycle the heat in synthesis gas, and producing steam.
3. CO according to claim 12The integral coal gasification fuel cell generation of near-zero release, it is characterised in that: institute
Dust-extraction unit (7) are stated using ceramic filter, remove the particulate matter in synthesis gas.
4. CO according to claim 12The integral coal gasification fuel cell generation of near-zero release, it is characterised in that: institute
High-temperature fuel cell (15) is stated to be made of anode, cathode and electrolyte membrance, cathode and anode respectively in electrolyte membrance two sides,
Battery operating temperature at 600 DEG C~1000 DEG C, amplified in series and parallel by multiple battery piles by the scale of battery.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321416A (en) * | 2018-03-29 | 2018-07-24 | 中国华能集团清洁能源技术研究院有限公司 | CO2The integral coal gasification fuel cell generation and method of near-zero release |
| CN111548826A (en) * | 2020-04-13 | 2020-08-18 | 哈尔滨锅炉厂有限责任公司 | Biomass gas boiler transformation method for MCFC circulation loop fuel cell-biomass gas-pulverized coal coupling and ammonia synthesis |
-
2018
- 2018-03-29 CN CN201820439557.9U patent/CN208423065U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321416A (en) * | 2018-03-29 | 2018-07-24 | 中国华能集团清洁能源技术研究院有限公司 | CO2The integral coal gasification fuel cell generation and method of near-zero release |
| CN111548826A (en) * | 2020-04-13 | 2020-08-18 | 哈尔滨锅炉厂有限责任公司 | Biomass gas boiler transformation method for MCFC circulation loop fuel cell-biomass gas-pulverized coal coupling and ammonia synthesis |
| CN111548826B (en) * | 2020-04-13 | 2021-07-20 | 哈尔滨锅炉厂有限责任公司 | Biomass gas boiler transformation method for MCFC circulation loop fuel cell-biomass gas-pulverized coal coupling and ammonia synthesis |
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