CN116667423A - Frequency modulation power supply and power generation system based on internal combustion engine - Google Patents
Frequency modulation power supply and power generation system based on internal combustion engine Download PDFInfo
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- CN116667423A CN116667423A CN202210147172.6A CN202210147172A CN116667423A CN 116667423 A CN116667423 A CN 116667423A CN 202210147172 A CN202210147172 A CN 202210147172A CN 116667423 A CN116667423 A CN 116667423A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 84
- 238000010248 power generation Methods 0.000 title claims abstract description 38
- 239000003245 coal Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 110
- 238000003786 synthesis reaction Methods 0.000 claims description 110
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000000746 purification Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 147
- 239000000446 fuel Substances 0.000 description 36
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 28
- 238000007664 blowing Methods 0.000 description 22
- 229910002092 carbon dioxide Inorganic materials 0.000 description 14
- 239000001569 carbon dioxide Substances 0.000 description 14
- 230000008878 coupling Effects 0.000 description 12
- 238000010168 coupling process Methods 0.000 description 12
- 238000005859 coupling reaction Methods 0.000 description 12
- 239000002817 coal dust Substances 0.000 description 10
- 239000002893 slag Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
- 239000012535 impurity Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 238000010923 batch production Methods 0.000 description 3
- 239000003818 cinder Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/04—Using steam or condensate extracted or exhausted from steam engine plant for specific purposes other than heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/08—Plants characterised by the engines using gaseous fuel generated in the plant from solid fuel, e.g. wood
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The application provides a frequency modulation power supply and a power generation system based on an internal combustion engine, wherein the frequency modulation power supply comprises a coal-fired power generator set and an internal combustion engine power generator set, and the frequency modulation power supply comprises the following components: the coal-fired power generating unit comprises a first generator, a steam turbine, a boiler, a coal mill, a synthetic gas generating furnace, a heating assembly and a condenser, and the internal combustion engine generating unit comprises a second generator, a heat exchange assembly and an internal combustion engine; the second output end of the steam turbine is connected with the first input end of the synthetic gas generator, the second output end of the coal mill is connected with the second input end of the synthetic gas generator, the first output end of the synthetic gas generator is connected with the second input end of the boiler, the second output end of the synthetic gas generator is connected with the third input end of the boiler, the third output end of the synthetic gas generator is connected with the first input end of the heat exchange assembly, and the first output end of the heat exchange assembly is connected with the input end of the internal combustion engine. The application can improve the frequency modulation effect.
Description
Technical Field
The application relates to the technical field of power generation, in particular to a frequency modulation power supply based on an internal combustion engine and a power generation system.
Background
In the power generation system, the coal motor group bears most of peak regulation and frequency modulation tasks of the power generation system. The coal motor group has the advantages of low frequency modulation rate, high efficiency, flexibility, high peak regulation and frequency modulation rate, high energy density, strong durability, safety and reliability, capability of simultaneously and greatly providing deep peak regulation and peak capacity, high-quality peak regulation and frequency modulation resources and capability of improving the frequency modulation rate through the coupling of the internal combustion engine. However, the internal combustion engine is difficult to apply in the area with scarce natural gas, and the area with abundant natural gas also has the problem of insufficient natural gas supply in winter, so that the frequency modulation effect is poor.
Disclosure of Invention
The application provides a frequency modulation power supply and a power generation system based on an internal combustion engine, which are used for solving the problem of poor frequency modulation effect.
In a first aspect, an embodiment of the present application provides a frequency modulated power supply based on an internal combustion engine, including a coal-fired power unit and an internal combustion engine power unit, wherein: the coal-fired power generation unit comprises a first generator, a steam turbine, a boiler, a coal mill, a synthetic gas generating furnace, a heating assembly and a condenser, and the internal combustion engine power generation unit comprises a second generator, a heat exchange assembly and an internal combustion engine;
the first output end of the coal mill is connected with the first input end of the boiler, the output end of the boiler is connected with the input end of the steam turbine, the first output end of the steam turbine is connected with the input end of the first generator, the second output end of the steam turbine is connected with the first input end of the synthesis gas generator, the second output end of the coal mill is connected with the second input end of the synthesis gas generator, the first output end of the synthesis gas generator is connected with the second input end of the boiler, the second output end of the synthesis gas generator is connected with the third input end of the boiler, the third output end of the synthesis gas generator is connected with the first input end of the heat exchange assembly, the first output end of the heat exchange assembly is connected with the input end of the internal combustion engine, the output end of the internal combustion engine is connected with the input end of the second generator, the output end of the condenser is connected with the first input end of the heating assembly, the first output end of the synthesis gas generator is connected with the second input end of the heating assembly, the second output end of the heating assembly is connected with the third input end of the heating assembly, the third output end of the heating assembly is connected with the third input end of the heating assembly.
In a second aspect, an embodiment of the present application further provides a power generation system, where the power generation system includes the fm power supply disclosed in the first aspect of the embodiment of the present application.
In this way, in the embodiment of the application, steam generated by a steam turbine in the coal-fired power generation unit can be input into the synthesis gas generator to serve as a gasifying agent for preparing synthesis gas by the synthesis gas generator, coal dust generated by the coal mill can be input into the synthesis gas generator to serve as fuel for preparing synthesis gas by the synthesis gas generator, synthesis gas prepared by the synthesis gas generator can be input into the internal combustion engine power generation unit to serve as fuel for the internal combustion engine power generation unit, and therefore the mode of coupling the coal-fired power generation unit and the internal combustion engine power generation unit is realized by the synthesis gas generator to provide fuel for the internal combustion engine, so that the frequency modulation power supply can work normally and the frequency modulation effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a FM power supply according to an embodiment of the present application;
FIG. 2 is a schematic illustration of a synthesis gas production process provided by an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," and the like in embodiments of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the present application means at least one of the connected objects, such as a and/or B and/or C, means 7 cases including a alone a, B alone, C alone, and both a and B, both B and C, both a and C, and both A, B and C.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a fm power supply according to an embodiment of the present application, as shown in fig. 1, including a coal-fired power generator set and an internal combustion engine power generator set, where: the coal-fired power generating unit comprises a first power generator 101, a steam turbine 102, a boiler 103, a coal mill 104, a synthetic gas generating furnace 105, a heating assembly 106 and a condenser 107, and the internal combustion engine power generating unit comprises a second power generator 201, a heat exchange assembly 202 and an internal combustion engine 203;
the first output end of the coal mill 104 is connected with the first input end of the boiler 103, the output end of the boiler 103 is connected with the input end of the steam turbine 102, the first output end of the steam turbine 102 is connected with the input end of the first generator 101, the second output end of the steam turbine 102 is connected with the first input end of the synthesis gas generator 105, the second output end of the coal mill 104 is connected with the second input end of the synthesis gas generator 105, the first output end of the synthesis gas generator 105 is connected with the second input end of the boiler 103, the second output end of the synthesis gas generator 105 is connected with the third input end of the boiler 103, the third output end of the synthesis gas generator 105 is connected with the first input end of the heat exchange assembly 202, the first output end of the heat exchange assembly 202 is connected with the input end of the internal combustion engine 203, the output end of the internal combustion engine 203 is connected with the input end of the second generator 201, the third output end of the 102 is connected with the second input end of the condenser 107, the first output end of the heat exchange assembly 106 is connected with the third input end of the heating assembly 106, the third output end of the heating assembly is connected with the third input end of the heating assembly 106.
It can be understood that the single-machine power generation unit of the coal-fired power generation unit has larger scale, can meet the requirement of large-scale frequency modulation, has higher peak regulation and frequency modulation endurance, but has lower response speed during frequency modulation operation due to the equipment with larger inertia such as the boiler 103, the steam turbine 102 and the like, and the internal combustion engine power generation unit can convert the heat energy emitted by the fuel into electric energy by burning the fuel in the unit.
Wherein, the coal mill 104 provides fuel for the boiler 103 by crushing and grinding coal blocks, meanwhile, the coal powder generated by the coal mill 104 can be input into the synthesis gas producer 105 to be used as raw material for preparing synthesis gas by the synthesis gas producer 105, and the fuel in the coal powder state can increase the surface area of the fuel, thereby being beneficial to combustion and reaction in the synthesis gas producer 105. It will be appreciated that the main chemical reactions within the above-described syngas producer 105 are as follows:
C+O 2 ＝CO 2 (combustion temperature-raising stage);
C+H 2 O＝CO+H 2 (synthesis gas preparation stage);
wherein the fuel of the synthesis gas generator 105 is pulverized coal (C), and the gasifying agent is steam (H 2 O). In the combustion temperature rising stage, the coal dust (C) and oxygen (O) in the air 2 ) React to generate carbon dioxide (CO) 2 )；In the synthesis gas preparation stage, coal dust (C) and steam (H 2 O) reacts to form carbon monoxide (CO) and hydrogen (H) 2 )。
In the above-described synthesis gas generator 105, the synthesis gas may be prepared by a batch process, and specifically may include the following six stages: (1) In the air blowing stage, part of fuel in the furnace is combusted under the action of blown air, the fuel layer is heated, the temperature is raised, heat is stored, and blown air is discharged from the upper part; (2) In the steam blowing-off stage, steam enters a material layer from the lower part of the furnace, and the internal air is emptied to ensure safety, so that residual blown air is discharged from a chimney; (3) In the primary upper blowing gas stage, steam enters a material layer from the lower part of the furnace, synthesis gas reaction occurs in the furnace to prepare synthesis gas, and the synthesis gas is sent out from the upper part of the furnace and is sent into an internal combustion engine generator set; (4) In the lower blowing gas stage, steam enters a fuel layer from the upper part of the furnace, the temperature in the furnace is balanced by utilizing high-temperature gas at the upper part of the fuel layer, and synthesis gas is produced at the same time and is sent out from the lower part of the furnace to be sent into an internal combustion engine generator set; (5) In the secondary upper blowing gas stage, steam enters a material layer from the lower part of the furnace, synthesis gas reaction occurs in the furnace to prepare synthesis gas, and the synthesis gas is sent out from the upper part of the furnace and is sent into an internal combustion engine generator set; (6) In the air blowing-off stage, steam is stopped, air is fed from the lower part of the furnace, so that the synthesis gas remained in the furnace and in the pipeline is blown out from the furnace and fed into the internal combustion engine generator set.
Optionally, as shown in fig. 1, the fm power supply further includes a purifying device 400, the first output end of the heat exchange assembly 202 is connected to the input end of the purifying device 400, and the output end of the purifying device 400 is connected to the input end of the internal combustion engine 203.
It will be appreciated that the synthesis gas produced by the synthesis gas generator 105 may be fed into the purification apparatus 400 and purified before being fed into the internal combustion engine generator set. Specifically, in the purification apparatus 400, impurities such as particles and tar can be removed by condensation and electrostatic trapping, and cooled and purified synthesis gas can be obtained and fed as fuel into the internal combustion engine 203.
In this embodiment, the synthesis gas is purified by the purification apparatus 400 and then is supplied to the internal combustion engine 203 as fuel, so that the power generation effect of the internal combustion engine 203 can be improved.
In the embodiment of the application, the synthetic gas can be generated by the synthetic gas generator 105 to be used as the fuel of the internal combustion engine generator set, coal dust can be provided for the synthetic gas generator 105 by the coal mill 104 in the coal-fired generator set, the steam turbine 102 in the coal-fired generator set provides gasifying agent steam for the synthetic gas generator 105, so that the synthetic gas generator 105 can react internally based on the coal dust and the steam and provide synthetic gas for the internal combustion engine generator set, and the coupling between the coal-fired generator set and the internal combustion engine generator set is realized. In addition, the steam provided by the steam turbine 102 for the synthesis gas generator 105 may be low-pressure cylinder steam extraction, the temperature and pressure meet the parameter requirements of the synthesis gas generator 105 for preparing the synthesis gas, and the heat energy utilization efficiency of the coal-fired generator set can be improved through the utilization of low-quality steam.
The synthesis gas generator 105 produces synthesis gas (the main component is H) 2 With CO, additionally containing a certain methane (CH 4 ) Slag and blowing gas are also obtained, specifically, the pulverized coal generates slag after combustion, and latent heat exists because the slag still has a certain carbon content, so that the slag can be directly sent into a boiler 103 in a coal-fired power generating unit for combustion so as to recover heat; before synthesis gas is prepared, air passes through the synthesis gas generator 105 to generate high-heat-quality blowing gas, sensible heat exists, and the components in the blowing gas comprise CO and H 2 There is considerable latent heat, and the blowing gas is considered to be introduced into the hearth of the coal-fired unit boiler 103 for combustion, so that CO and H are exerted 2 And the sensible heat is used for supporting the furnace temperature, so that the latent heat and the sensible heat of the blowing air are recovered.
In the embodiment of the present application, steam generated by the steam turbine 102 in the coal-fired power generation unit may be input to the synthesis gas generator 105 to be used as a gasifying agent for preparing synthesis gas by the synthesis gas generator 105, coal dust generated by the coal mill 104 may be input to the synthesis gas generator 105 to be used as fuel for preparing synthesis gas by the synthesis gas generator 105, and synthesis gas prepared by the synthesis gas generator 105 may be input to the internal combustion engine power generation unit to be used as fuel for the internal combustion engine power generation unit, so that a mode of coupling the coal-fired power generation unit and the internal combustion engine power generation unit is realized by the synthesis gas generator 105 to provide fuel for the internal combustion engine 203, thereby ensuring that the frequency modulation power supply can normally work and improving a frequency modulation effect.
In addition, during the process of preparing the synthesis gas by the synthesis gas producer 105, coal cinder and blowing gas are also generated, and the coal cinder can be input into the boiler 103 for combustion, so that heat in the coal cinder is recovered, and the full utilization of the heat is realized; sensible heat exists in the generated blowing gas, and the blowing gas contains CO and H 2 There is considerable latent heat which can be input into the boiler 103 for combustion, giving play to CO and H 2 The sensible heat of the blowing gas is utilized to support the temperature of the hearth of the boiler 103, the sensible heat and the latent heat of the blowing gas are fully utilized, and the energy utilization rate is improved.
And after the synthesis gas is prepared by the synthesis gas producer 105, the synthesis gas is firstly input into the heat exchange assembly 202 and coupled with the heating assembly 106 of the coal-fired power generation unit, so that the heating of the feed water of the boiler 103 is realized, the sensible heat of the synthesis gas can be utilized, and the energy consumption of the heating assembly 106 is reduced.
Optionally, as shown in fig. 1, the heating assembly 106 includes a condensate pump 1061, a low pressure heater 1062, a deaerator 1063, a feedwater pump 1064, and a high pressure heater 1065, where:
the output end of the condenser 107 is connected with the input end of the condensation pump 1061, the output end of the condensation pump 1061 is connected with the input end of the low-pressure heater 1062, the output end of the low-pressure heater 1062 is connected with the input end of the deaerator 1063, the output end of the deaerator 1063 is connected with the input end of the water feeding pump 1064, the output end of the water feeding pump 1064 is connected with the input end of the high-pressure heater 1065, and the output end of the high-pressure heater 1065 is connected with the fourth input end of the boiler 103;
the output end of the condensing pump 1061 is connected to the second input end of the heat exchange assembly 202, the second output end of the heat exchange assembly 202 is connected to the input end of the deaerator 1063, the output end of the feed pump 1064 is connected to the third input end of the heat exchange assembly 202, and the third output end of the heat exchange assembly 202 is connected to the fourth input end of the boiler 103.
The heat exchange unit 202 is connected in parallel with the high pressure heater 1065 and the low pressure heater 1062, respectively, that is, in the process of heating the feed water of the boiler 103, the heat exchange unit 202 performs the same heating function as the high pressure heater 1065 and the low pressure heater 1062 by exchanging heat between the synthesis gas and the feed water, and can fully utilize sensible heat of the synthesis gas.
In this embodiment, the steam generated by the steam turbine 102 is condensed and heated by the condensation pump 1061, the low-pressure heater 1062, the deaerator 1063, the water feed pump 1064, and the high-pressure heater 1065, and is used as the water feed for the boiler 103, thereby realizing the internal circulation of the coal-fired power generation unit.
Optionally, as shown in fig. 1, the heat exchange assembly 202 includes a first heat exchanger 2021 and a second heat exchanger 2022, the third output end of the syngas generator 105 is connected to the first input end of the first heat exchanger 2021, the first output end of the first heat exchanger 2021 is connected to the first input end of the second heat exchanger 2022, and the first output end of the second heat exchanger 2022 is connected to the input end of the internal combustion engine 203;
an output of the condensate pump 1061 is coupled to a second input of the second heat exchanger 2022, and a second output of the second heat exchanger 2022 is coupled to an input of the deaerator 1063;
an output of the feedwater pump 1064 is coupled to a second input of the first heat exchanger 2021, and a second output of the first heat exchanger 2021 is coupled to a fourth input of the boiler 103.
Wherein, the output end of the condensation pump 1061 is connected to the second input end of the second heat exchanger 2022, the second output end of the second heat exchanger 2022 is connected to the input end of the deaerator 1063, the output end of the condensation pump 1061 is connected to the input end of the low-pressure heater 1062, the output end of the low-pressure heater 1062 is connected to the input end of the deaerator 1063, that is, the second heat exchanger 2022 is connected in parallel with the low-pressure heater 1062, so as to heat the water output by the condensation pump 1061; the output end of the water feed pump 1064 is connected to the second input end of the first heat exchanger 2021, the second output end of the first heat exchanger 2021 is connected to the fourth input end of the boiler 103, the output end of the water feed pump 1064 is connected to the input end of the high pressure heater 1065, and the output end of the high pressure heater 1065 is connected to the fourth input end of the boiler 103, that is, the first heat exchanger 2021 is connected in parallel with the high pressure heater 1065, so that the water output from the water feed pump 1064 can be heated.
It will be appreciated that the synthesis gas produced by the synthesis gas producer 105 first enters the first heat exchanger 2021 to exchange heat, then enters the second heat exchanger 2022 to exchange heat, and then enters the internal combustion engine 203 as fuel of the internal combustion engine 203, and in the process, the sensible heat of the synthesis gas entering the first heat exchanger 2021 is higher than that entering the second heat exchanger 2022, so that the sensible heat of the synthesis gas can be respectively corresponding to the high-pressure heater 1065 and the low-pressure heater 1062, so as to realize gradual heating of the feed water of the boiler 103, and improve the utilization rate of the sensible heat of the synthesis gas.
In this embodiment, the synthesis gas produced by the synthesis gas generator 105 passes through the first heat exchanger 2021 and the second heat exchanger 2022, so that sensible heat of the synthesis gas can be recovered.
Optionally, as shown in fig. 1, the fm power supply further includes a first valve 301, a second valve 302, a third valve 303, and a fourth valve 304, where an output end of the feedwater pump 1064 is connected to a first end of the first valve 301, a second end of the first valve 301 is connected to an input end of the low-pressure heater 1062, a third end of the first valve 301 is connected to a first end of the second valve 302, and a second end of the second valve 302 is connected to a second input end of the first heat exchanger 2021;
the output end of the feed pump 1064 is connected to the first end of the third valve 303, the second end of the third valve 303 is connected to the input end of the high-pressure heater 1065, the third end of the third valve 303 is connected to the first end of the fourth valve 304, and the second end of the fourth valve 304 is connected to the second input end of the second heat exchanger 2022.
In this embodiment, the first valve 301 and the second valve 302 may control the amount of water required to be heated by the second heat exchanger 2022, and the third valve 303 and the fourth valve 304 may control the amount of water required to be heated by the first heat exchanger 2021, so that the heating of the boiler 103 by the heat exchange assembly 202 and the heating assembly 106 may be flexibly adjusted according to the synthesis gas produced by the synthesis gas producer 105.
Optionally, as shown in fig. 1, the fm power supply further includes a gas storage device 500, an output end of the purifying device 400 is connected to an input end of the gas storage device 500, and an output end of the gas storage device 500 is connected to an input end of the internal combustion engine 203.
The synthesis gas produced by the synthesis gas generator 105 may be stored in the gas storage device 500, and may supply fuel to the internal combustion engine 203 based on the fm signal received by the fm power supply, increase the power generation amount, or decrease the synthesis gas supplied to the internal combustion engine 203, and decrease the power generation amount.
In this embodiment, the gas storage device 500 can store the synthesis gas purified by the purification device 400, and supply the synthesis gas to the internal combustion engine 203 when the power generation amount needs to be increased, thereby ensuring the realization of frequency modulation.
For ease of understanding, specific examples are as follows:
the application provides a power generation system of an internal combustion engine coupling coal-fired unit, which is a system for supplying fuel of the internal combustion engine by a synthetic gas generator and simultaneously coupling with the coal-fired unit, can ensure the reliability of fuel supply of the coupling system, and simultaneously plays the roles of generating power by the internal combustion engine coupling coal-fired unit and providing high-quality peak regulation and frequency modulation for the system. In the coupling system, the synthetic gas producer is respectively coupled with the coal-fired unit in terms of input and output, fuel coal dust and gasifying agent steam come from the coal-fired unit in terms of output, sensible heat and latent heat of blown gas, slag latent heat and sensible heat of synthetic gas are respectively coupled with a boiler of the coal-fired unit and a high-low pressure heater, so that the fuel source of the internal combustion engine is ensured, the efficiency of the whole coupling system is improved, the investment of waste heat recovery equipment is saved, and the economical efficiency is improved. In addition, after the synthesis gas is cooled by thermal coupling, impurities such as particles, tar and the like are removed through a purification device, and finally the synthesis gas enters the internal combustion engine as fuel. The internal combustion engine is coupled to the coal-fired unit power generation system, see fig. 1.
In the embodiment of the application, the fuel of the internal combustion engine is synthetic gas which is mainly H 2 With CO, additionally containing a certain amount of CO 2 Hydrogen sulfide (H) 2 S)、O 2 、CH 4 And nitrogen (N) 2 ) Specific components and ratios are shown in table 1.
TABLE 1
The synthesis gas may be produced by a batch process using a synthesis gas generator. The main chemical reaction formula is as follows:
C+O 2 ＝CO 2 (combustion temperature-raising stage);
C+H 2 O＝CO+H 2 (synthesis gas preparation stage);
the fuel of the synthetic gas producer is coal powder, and the gasifying agent is steam. In the embodiment of the application, the steam source for preparing the synthetic gas by the producer is the steam extraction of the low-pressure cylinder of the steam turbine of the existing coal-fired unit, the temperature and the pressure of the steam are in accordance with the parameter requirements of the gasifying agent prepared by the producer, and meanwhile, the heat energy utilization efficiency of the coal-fired unit can be improved by utilizing low-quality steam; the coal powder source is a coal mill of an existing coal-fired unit, and the coal mill can produce high-quality coal powder which can be favorable for combustion, thereby being favorable for the reaction. Therefore, a new facility is not needed to be built or provided outside for the fuel source of the producer, the sources of the fuel and the gasifying agent prepared by the producer and the temperature parameters are shown as figure 2, in the producer, coal dust generated by a coal mill enters from the top of the producer and burns, the coal dust gradually becomes slag to reach the bottom of the producer, and the temperature change is shown as a curve corresponding to the coal dust and the slag in figure 2; the low-pressure cylinder of the steam turbine is pumped from the bottom of the furnace and used as a gasifying agent to participate in the synthesis gas preparation process, and the generated synthesis gas is output from the top of the furnace, and the temperature change of the synthesis gas is shown as a curve corresponding to steam and synthesis gas in FIG. 2.
The embodiment of the application combines an intermittent method to prepare synthesis gas, and provides a thermal coupling technical scheme of a coal motor unit, an internal combustion engine and a synthesis gas generator. Batch processes typically employ a six-stage cycle of operation, including: (1) In the air blowing stage, part of fuel in the furnace is combusted under the action of blown air, the fuel layer is heated, the temperature is raised, heat is stored, and blown air is discharged from the upper part; (2) In the steam blowing-off stage, steam enters a material layer from the lower part of the furnace, and the internal air is emptied to ensure safety, so that residual blown air is discharged from a chimney; (3) In the primary upper blowing gas stage, steam enters a material layer from the lower part of the furnace, synthesis gas reaction occurs in the furnace to prepare synthesis gas, and the synthesis gas is sent out from the upper part of the furnace and sent into an impurity purification system; (4) In the lower blowing gas stage, steam enters a fuel layer from the upper part of the furnace, the temperature in the furnace is balanced by utilizing high-temperature gas production at the upper part of the fuel layer, and synthesis gas is produced at the same time, and is sent out from the lower part of the furnace and is sent into an impurity purification system; (5) In the secondary upper blowing gas stage, steam enters a material layer from the lower part of the furnace, synthesis gas reaction occurs in the furnace to prepare synthesis gas, and the synthesis gas is sent out from the upper part of the furnace and sent into an impurity purification system; (6) In the air blowing-off stage, steam is stopped, air is fed from the lower part of the furnace, so that the synthesis gas remained in the furnace and in the pipeline is blown out from the furnace, and the impurity purification system is provided.
Because the air in the first stage passes through the furnace, high-quality blowing air is generated, considerable sensible heat exists, and the components in the blowing air comprise CO and H 2 There is considerable latent heat, and the blowing gas is considered to be introduced into the boiler furnace of the coal-fired unit for combustion, so that CO and H are exerted 2 And the sensible heat is used for supporting the furnace temperature, so that the latent heat and the sensible heat of the blowing air are recovered. The synthetic gas is used as fuel of internal combustion engine, the latent heat is mainly used, and after the impurity is removed from the upblown synthetic gas produced by the producer through the impurity purification system, the purified synthetic gas still has higher sensible heat quality, namely still has objective sensible heat, and the purified synthetic gas can be subjected to heat exchange with water in the high-pressure heater through the heat exchanger successively and then is subjected to heat exchange with water in the high-pressure heaterThe circulating water of the low-pressure heater is subjected to heat exchange, so that sensible heat of the synthesis gas is recovered. In the process of preparing the synthetic gas, the coal in the producer generates slag after combustion and is discharged outside the producer, and the slag has latent heat due to certain carbon content, so that the slag is directly sent into a boiler of a coal-fired unit for combustion, thereby recovering heat. Finally, the sensible heat recovery and cooling synthesis gas passes through a purification device, and impurities such as particles and tar are removed through condensation and static electricity trapping, so that cooled and purified synthesis gas is obtained, and the cooled and purified synthesis gas is used as fuel to be introduced into an internal combustion engine.
The embodiment of the application further provides a power generation system which comprises the frequency modulation power supply based on the internal combustion engine. It should be noted that, the power generation system provided in the embodiment of the present application includes all the technical features in the embodiment of the frequency modulation power supply based on the internal combustion engine, and can achieve the same technical effects, so that repetition is avoided, and no further description is provided here.
While the foregoing is directed to the preferred embodiments of the present application, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.
Claims (7)
1. The utility model provides a frequency modulation power supply based on internal-combustion engine which characterized in that includes coal-fired generating set and internal-combustion engine generating set, wherein: the coal-fired power generation unit comprises a first generator, a steam turbine, a boiler, a coal mill, a synthetic gas generating furnace, a heating assembly and a condenser, and the internal combustion engine power generation unit comprises a second generator, a heat exchange assembly and an internal combustion engine;
the first output end of the coal mill is connected with the first input end of the boiler, the output end of the boiler is connected with the input end of the steam turbine, the first output end of the steam turbine is connected with the input end of the first generator, the second output end of the steam turbine is connected with the first input end of the synthesis gas generator, the second output end of the coal mill is connected with the second input end of the synthesis gas generator, the first output end of the synthesis gas generator is connected with the second input end of the boiler, the second output end of the synthesis gas generator is connected with the third input end of the boiler, the third output end of the synthesis gas generator is connected with the first input end of the heat exchange assembly, the first output end of the heat exchange assembly is connected with the input end of the internal combustion engine, the output end of the internal combustion engine is connected with the input end of the second generator, the output end of the condenser is connected with the first input end of the heating assembly, the first output end of the synthesis gas generator is connected with the second input end of the heating assembly, the second output end of the heating assembly is connected with the third input end of the heating assembly, the third output end of the heating assembly is connected with the third input end of the heating assembly.
2. The fm power supply of claim 1, wherein said heating assembly comprises a condensate pump, a low pressure heater, a deaerator, a feed pump, and a high pressure heater, wherein:
the output end of the condenser is connected with the input end of the condensing pump, the output end of the condensing pump is connected with the input end of the low-pressure heater, the output end of the low-pressure heater is connected with the input end of the deaerator, the output end of the deaerator is connected with the input end of the water supply pump, the output end of the water supply pump is connected with the input end of the high-pressure heater, and the output end of the high-pressure heater is connected with the fourth input end of the boiler;
the output of condensing pump is connected the second input of heat transfer subassembly, the second output of heat transfer subassembly is connected the input of deaerator, the output of feed water pump is connected the third input of heat transfer subassembly, the fourth output of heat transfer subassembly is connected the fourth input of boiler.
3. The fm power supply as claimed in claim 2, wherein said heat exchange assembly includes a first heat exchanger and a second heat exchanger, said third output of said syngas generator being connected to said first input of said first heat exchanger, said first output of said first heat exchanger being connected to said first input of said second heat exchanger, said first output of said second heat exchanger being connected to said input of said internal combustion engine;
the output end of the condensing pump is connected with the second input end of the second heat exchanger, and the second output end of the second heat exchanger is connected with the input end of the deaerator;
the output end of the water feeding pump is connected with the second input end of the first heat exchanger, and the second output end of the first heat exchanger is connected with the fourth input end of the boiler.
4. A fm power supply as claimed in claim 3, further comprising a first valve, a second valve, a third valve and a fourth valve, wherein an output of said feedwater pump is connected to a first end of said first valve, a second end of said first valve is connected to an input of said low pressure heater, a third end of said first valve is connected to a first end of said second valve, and a second end of said second valve is connected to a second input of said first heat exchanger;
the output end of the water feeding pump is connected with the first end of the third valve, the second end of the third valve is connected with the input end of the high-pressure heater, the third end of the third valve is connected with the first end of the fourth valve, and the second end of the fourth valve is connected with the second input end of the second heat exchanger.
5. A frequency modulated power supply as in any of claims 1-4, further comprising a purification device, wherein a first output of said heat exchange assembly is coupled to an input of said purification device, and wherein an output of said purification device is coupled to an input of said internal combustion engine.
6. The fm power supply according to claim 5, further comprising a gas reservoir, wherein an output of said purification device is connected to an input of said gas reservoir, and wherein an output of said gas reservoir is connected to an input of said internal combustion engine.
7. A power generation system comprising the frequency modulated power supply of any one of claims 1 to 6.
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