CN117379937A - Boiler stable combustion system and method - Google Patents
Boiler stable combustion system and method Download PDFInfo
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- CN117379937A CN117379937A CN202311401357.6A CN202311401357A CN117379937A CN 117379937 A CN117379937 A CN 117379937A CN 202311401357 A CN202311401357 A CN 202311401357A CN 117379937 A CN117379937 A CN 117379937A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000001257 hydrogen Substances 0.000 claims abstract description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009841 combustion method Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000010248 power generation Methods 0.000 claims description 9
- 238000003786 synthesis reaction Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 238000005984 hydrogenation reaction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- 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
- B01D53/14—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
- B01D53/1418—Recovery of products
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
- C07C1/12—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon from carbon dioxide with hydrogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/08—Production of synthetic natural gas
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
- C25B1/042—Hydrogen or oxygen by electrolysis of water by electrolysis of steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a stable combustion system and a stable combustion method for a boiler, and aims to solve the technical problem that in the prior art, when the load of a thermal power plant is reduced to a lower level, the boiler cannot burn stably. The system comprises a high-temperature electrolytic cell, a generator, an inverter, a boiler, a steam turbine, a condenser and a water supply pump; the water outlet of the water feed pump is communicated with the boiler, the boiler is communicated with the steam turbine, the steam turbine is communicated with the condenser, and the condenser is communicated with the water inlet of the water feed pump; the generator is respectively connected with a power grid, the steam turbine and the inverter, the inverter is connected with the high-temperature electrolytic cell, and the high-temperature electrolytic cell is communicated with the boiler. The invention utilizes the coupling of the high-temperature electrolytic cell and the boiler of the thermal power plant, can output redundant power to the high-temperature electrolytic cell when the power load is reduced and the power of the thermal power plant on the internet is required to be reduced, and simultaneously, can convey part of redundant steam to the high-temperature electrolytic cell for electrolytic hydrogen production, and can convert redundant electric energy into chemical energy for storage.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to a stable combustion system and a stable combustion method for a boiler.
Background
In order to construct a clean, low-carbon, safe and efficient modern energy system, the installed capacity of renewable energy sources in China is rapidly increased. New energy sources represented by wind power and solar power generation gradually become main power sources of China, and the power generation proportion in a power grid is increased year by year. However, wind power and solar power generation are intermittent unstable power sources, and due to the characteristics of randomness and intermittence, the power volatility is high, the difficulty of space-time matching with power requirements is high, the contribution of renewable energy sources to power grid peak shaving is extremely limited, the electric quantity of the renewable energy sources is ensured to be supported and ensured by thermal power with regulation capability, higher requirements are provided for participation in deep peak shaving of a thermal power plant, and a coal motor unit with good peak shaving potential is playing an important role in basic regulation energy sources in the power grid.
The coal-fired boiler is used as a front end core system of the coal motor unit, and the low (variable) load operation performance of the coal-fired boiler directly influences the integral peak regulation capacity of the coal motor unit. When the load of the thermal power plant is reduced to a lower level, the temperature of the flue gas at the inlet of the boiler denitration device is too low, so that the denitration device cannot work, and the problem that pollutant emission does not reach the standard can occur; the load is continuously reduced, and the uneven mixing in the boiler is caused by the further reduction of the flow of the combustion substances (coal dust, oil and the like), so that the boiler cannot burn stably, and even the local temperature in the boiler is finally too low, so that the flameout and the serious safety problem of a black furnace are caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a stable combustion system of a boiler, which aims to solve the technical problem that the boiler cannot burn stably when the load of a thermal power plant is reduced to a lower level in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: the stable combustion system of the boiler is designed and comprises a power generation module, a thermodynamic cycle module and a high-temperature electrolytic cell; the power generation module comprises a generator and an inverter; the thermodynamic cycle module comprises a boiler, a steam turbine, a condenser and a water supply pump; the water outlet of the water feed pump is communicated with the boiler, the boiler is communicated with the steam turbine, the steam turbine is communicated with the condenser, and the condenser is communicated with the water inlet of the water feed pump; the generator is respectively connected with a power grid, the steam turbine and the inverter, the inverter is connected with the high-temperature electrolytic cell, and the high-temperature electrolytic cell is communicated with the boiler.
Further, also comprises CO 2 A capture module, the CO 2 The trapping module is communicated with the boiler.
Further, also comprises CH 4 Synthesis reactor, said CH 4 The synthesis reactor is respectively connected with the high-temperature electrolytic cell and the CO 2 The trapping module is communicated.
Preferably, the high-temperature electrolytic cell is a solid oxide electrolytic cell, and the working temperature is 500-1000 ℃.
The invention further provides a stable combustion method of the boiler by using the system, which comprises the following steps: the pulverized coal is combusted and heated in the boiler, so that water which is pressurized by the water feeding pump and enters the boiler generates high-temperature high-pressure steam, and the steam enters the steam turbine to push the steam turbine to rotate and drive the generator to generate electricity; the waste steam of the steam after the steam turbine works enters the condenser to be condensed into liquid water, and the liquid water is further pressurized by the water feeding pump to enter the boiler to form complete circulation; the inverter converts alternating current generated by the generator into direct current; the high-temperature electrolytic cell utilizes the direct current to electrolyze high-temperature steam into oxygen and hydrogen, and converts redundant electric energy into chemical energy for storage.
Further, when the operation temperature of the high-temperature electrolytic cell is higher than the steam temperature, the steam in the boiler is preheated by using surplus power and then is led into the high-temperature electrolytic cell.
Furthermore, the high-temperature electrolytic cell is driven by two parts of energy, namely electric energy and heat energy, and the heat and electricity proportion in the electrolytic process is regulated by adjusting voltage and current.
Further, the flue gas after the boiler combustion enters CO after being pressurized 2 The absorption tower is recovered by the absorbent, and then enters CO after being heated and pressurized 2 The pure CO is obtained by the gas-liquid separator after the temperature of the analytic tower is reduced 2 。
Further, the CO obtained by recycling the flue gas 2 And hydrogen produced by electrolysis of water vapor is subjected to hydrogenation reaction to produce methane.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the invention provides a method for producing hydrogen by utilizing the coupling of a high-temperature electrolytic cell and a boiler of a thermal power plant and utilizing surplus power load to electrolyze water, which can output surplus power to the high-temperature electrolytic cell when the power load is reduced and the internet power of the thermal power plant needs to be reduced, and simultaneously, part of surplus steam is conveyed to the high-temperature electrolytic cell for producing hydrogen by electrolysis, and the surplus power is converted into chemical energy for storage.
2. The high-temperature electrolytic cell is a solid oxide electrolytic cell, the working temperature is 500-1000 ℃, the working temperature is equal to the steam temperature of the boiler, and when the operating temperature of the electrolytic cell is higher than the steam temperature, the boiler steam can be preheated by using surplus electric power and then led into the electrolytic cell; the high-temperature electrolytic cell can be driven by two parts of energy, namely electric energy and heat energy, and the heat and electricity proportion in the electrolytic process can be adjusted by adjusting voltage and current.
3. The invention utilizes the generated hydrogen and the carbon dioxide trapped by the tail gas of the boiler to prepare methane through the catalytic hydrogenation of the carbon dioxide, can simultaneously utilize redundant electric energy, heat energy and steam during deep peak shaving of a thermal power plant to maintain stable combustion of the boiler, simultaneously recovers part of carbon dioxide, and can be used as fuel for selling to produce methane, thereby improving the technical economy and avoiding the difficult problem of hydrogen storage and transportation.
Drawings
Fig. 1 is a schematic diagram of a stable combustion system of a boiler in embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a stable combustion system of a boiler in embodiment 2 of the present invention.
FIG. 3 is a graph of CO in example 2 of the present invention 2 A schematic of the trapping module.
In the figure, 1 is a boiler, 2 is a steam turbine, 3 is a condenser, 4 is a water supply pump, 5 is a generator, 6 is an inverter, 7 is a high-temperature electrolytic cell, and 8 is CO 2 The trapping module 9 is CH 4 Synthesis reactor, 10 is CO 2 The absorption tower, 11 is a booster pump, 12 is a heat exchanger, and 13 is CO 2 The analysis tower, 14 is CO 2 The water cooler 15 is CO 2 A gas-liquid separator.
Detailed Description
The following examples are given to illustrate the invention in detail, but are not intended to limit the scope of the invention in any way.
Example 1: a stable combustion system of a boiler, see fig. 1, comprises a power generation module, a thermal power plant thermodynamic cycle module and a high-temperature electrolytic cell; the power generation module comprises a generator 5 and an inverter 6; the thermal power plant thermodynamic cycle module comprises a boiler 1, a steam turbine 2, a condenser 3 and a water supply pump 4; the water outlet of the water feed pump 4 is communicated with the boiler 1, the boiler 1 is communicated with the steam turbine 2, the steam turbine 2 is communicated with the condenser 3, and the condenser 3 is communicated with the water inlet of the water feed pump 4; the generator 5 is respectively connected with a power grid, the steam turbine 2 and the inverter 6, the inverter 6 is connected with the high-temperature electrolytic cell 7, and the high-temperature electrolytic cell 7 is communicated with the boiler 1.
The liquid water is input into the boiler 1 through the water pump 4, is heated to become water vapor, one part of the water vapor is output into the steam turbine 2 for generating electricity, and the other part of the water vapor is output into the high-temperature electrolytic cell 7 for producing hydrogen by electrolysis.
The high-temperature electrolytic cell 7 is a Solid Oxide Electrolytic Cell (SOEC) and has the working temperature of 500-1000 ℃. When the operation temperature of the high-temperature electrolytic cell 7 is higher than the steam temperature, the steam in the boiler 1 is preheated by surplus power and then introduced into the high-temperature electrolytic cell 7. The high-temperature electrolytic cell 7 is driven by two parts of energy, namely electric energy and heat energy, and the heat and electricity proportion in the electrolytic process is regulated by adjusting voltage and current.
Example 2: a boiler steady combustion peak regulation system, see fig. 2, differs from embodiment 1 in that it further comprises CO 2 Trapping module 8 and CH 4 A synthesis reactor 9.CO 2 The trapping module 8 is communicated with the boiler 1 for collecting CO 2 。CH 4 The synthesis reactor 9 is respectively connected with a hydrogen output port and CO of the high-temperature electrolytic cell 7 2 The trapping module 8 communicates. Recovering CO from flue gas 2 And hydrogen produced by electrolysis of water vapor is subjected to hydrogenation reaction to produce methane.
Wherein CO 2 The trapping module is as follows: referring to FIG. 3, the flue gas after combustion in the boiler 1 is pressurized and enters CO 2 The absorption tower 10 is recovered by absorbent, and then is heated and pressurized by the booster pump 11 and the heat exchanger 12 to enter CO 2 Analytical column 13 via CO 2 Cooling the water cooler 14 and then passing through CO 2 The gas-liquid separator 15 obtains pure CO 2 。
Example 3: the steady combustion peak regulation method of the thermal power plant based on the embodiment 2 is characterized in that coal dust is combusted and heated in a boiler, so that water entering the boiler through pressurization of a water feeding pump generates high-temperature and high-pressure steam, and the steam enters a steam turbine to drive the steam turbine to rotate and drive a generator to generate electricity. The waste steam of the steam after the steam turbine works enters a condenser to be condensed into liquid water, and the liquid water is further pressurized by a water feeding pump to enter a boiler to form complete circulation. The inverter can convert alternating current generated by the generator into direct current; the high-temperature electrolytic cell can electrolyze high-temperature steam into oxygen and hydrogen by using direct current, and convert redundant electric energy into chemical energy for storage; CO 2 The trapping component can trap and release carbon dioxide in the tail flue gas of the boiler; CH (CH) 4 The hydrogenation reaction of carbon dioxide takes place in the synthesis reactor to produce methane.
When the power grid dispatching requires the thermal power plant to reduce the output power load, in order to ensure stable combustion under the low-load condition, the electric energy generated in the thermal power plant thermodynamic cycle is larger than the electric energy demand of the power grid. At the moment, the redundant electric energy output by the generator is converted into direct current through the inverter and drives the high-temperature electrolytic cell to electrolyze water to generate hydrogen, so that the redundant electric energy is converted into chemical energy for storage. Meanwhile, part of high-temperature and high-pressure steam generated by the boiler enters the high-temperature electrolytic cell after being depressurized, reactants are provided for electrolytic reaction, and the amount of the steam entering the steam turbine is reduced, so that the generated energy is reduced.
Specifically, the reaction occurring in the high temperature electrolytic cell is H 2 O→H 2 +0.5O 2 。
When the cell is operated in a heat neutral mode, power 248 kJ is consumed per 1 mole of water decomposed. When the electrolytic cell shares the power load of 100 MW, 2.6 t/h of steam can be consumed, and the on-line electric quantity can be greatly reduced under the condition of not excessively reducing the load of the boiler, so that stable combustion under the condition of deep peak shaving is realized.
CO 2 The trapping module can trap CO in the tail gas of the boiler 2 Thereby obtaining high purityCO 2 . The CO obtained 2 With hydrogen generated by electrolysis in CH 4 Hydrogenation reaction is generated in the synthesis reactor to generate CH 4 As fuel storage, in reducing power plant CO 2 While discharging, H is avoided 2 Storage difficulties.
The invention is described in detail above with reference to the drawings and examples; however, it will be understood by those skilled in the art that various specific parameters of the above embodiments may be changed or equivalents may be substituted for related parts and structures thereof without departing from the spirit of the present invention, so as to form a plurality of specific embodiments, which are common variations of the present invention and will not be described in detail.
Claims (9)
1. The stable combustion system of the boiler is characterized by comprising a power generation module, a thermodynamic cycle module and a high-temperature electrolytic cell; the power generation module comprises a generator and an inverter; the thermodynamic cycle module comprises a boiler, a steam turbine, a condenser and a water supply pump; the water outlet of the water feed pump is communicated with the boiler, the boiler is communicated with the steam turbine, the steam turbine is communicated with the condenser, and the condenser is communicated with the water inlet of the water feed pump; the generator is respectively connected with a power grid, the steam turbine and the inverter, the inverter is connected with the high-temperature electrolytic cell, and the high-temperature electrolytic cell is communicated with the boiler.
2. The boiler steady burning system of claim 1, further comprising CO 2 A capture module, the CO 2 The trapping module is communicated with the boiler.
3. The boiler stable combustion system of claim 2, further comprising CH 4 Synthesis reactor, said CH 4 The synthesis reactor is respectively connected with the high-temperature electrolytic cell and the CO 2 The trapping module is communicated.
4. The stable combustion system of claim 1, wherein the high temperature electrolytic cell is a solid oxide electrolytic cell and has an operating temperature of 500-1000 ℃.
5. A method of stabilizing boiler firing using the system of any one of claims 1-4, comprising the steps of: the pulverized coal is combusted and heated in the boiler, so that water which is pressurized by the water feeding pump and enters the boiler generates high-temperature high-pressure steam, and the steam enters the steam turbine to push the steam turbine to rotate and drive the generator to generate electricity; the waste steam of the steam after the steam turbine works enters the condenser to be condensed into liquid water, and the liquid water is further pressurized by the water feeding pump to enter the boiler to form complete circulation; the inverter converts alternating current generated by the generator into direct current; the high-temperature electrolytic cell utilizes the direct current to electrolyze high-temperature steam into oxygen and hydrogen, and converts redundant electric energy into chemical energy for storage.
6. The stable combustion method of a boiler according to claim 5, wherein when the operation temperature of the high temperature electrolytic cell is higher than the steam temperature, the steam in the boiler is preheated by surplus power and then introduced into the high temperature electrolytic cell.
7. The stable combustion method of the boiler according to claim 5, wherein the high-temperature electrolytic cell is driven by two parts of energy, namely electric energy and thermal energy, and the thermal ratio and the electric ratio of the electrolytic process are adjusted by adjusting voltage and current.
8. The stable combustion method of a boiler according to claim 5, wherein the flue gas after combustion of the boiler enters CO after being pressurized 2 The absorption tower is recovered by the absorbent, and then enters CO after being heated and pressurized 2 The pure CO is obtained by the gas-liquid separator after the temperature of the analytic tower is reduced 2 。
9. The stable combustion method of a boiler according to claim 8, wherein the flue gas is recycled to obtain CO 2 Adding hydrogen produced by electrolysis of water vaporThe hydrogen reacts to form methane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311401357.6A CN117379937A (en) | 2023-10-26 | 2023-10-26 | Boiler stable combustion system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311401357.6A CN117379937A (en) | 2023-10-26 | 2023-10-26 | Boiler stable combustion system and method |
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| CN117379937A true CN117379937A (en) | 2024-01-12 |
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| CN202311401357.6A Pending CN117379937A (en) | 2023-10-26 | 2023-10-26 | Boiler stable combustion system and method |
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- 2023-10-26 CN CN202311401357.6A patent/CN117379937A/en active Pending
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