CN208831056U - A kind of shunting recompression supercritical carbon dioxide co-generation unit - Google Patents
A kind of shunting recompression supercritical carbon dioxide co-generation unit Download PDFInfo
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- CN208831056U CN208831056U CN201821502978.8U CN201821502978U CN208831056U CN 208831056 U CN208831056 U CN 208831056U CN 201821502978 U CN201821502978 U CN 201821502978U CN 208831056 U CN208831056 U CN 208831056U
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Abstract
The utility model discloses a kind of shuntings to recompress supercritical carbon dioxide co-generation unit, the system includes Heating Season main compressor, non-heating season main compressor, recompression machine, cryogenic regenerator, high temperature regenerator, boiler, high pressure turbine, the first generator, low pressure turbine, the second generator, forecooler and heat exchangers for district heating；The utility model by supercritical carbon dioxide recycle based on construct the co-generation unit of high efficient and flexible, include Heating Season and non-heating season process flow, compared to conventional Supercritical carbon dioxide thermoelectricity unit, which has higher generating efficiency and efficiency of energy utilization in Heating Season and non-heating season；By the process flow of the Heating Season and non-heating season of optimization, the operational flexibility of thermoelectricity unit is improved, and two kinds of process flows are easy conversion when Heating Season and non-heating season replace.
Description
Technical field
The utility model belongs to cogeneration of heat and power field, and in particular to a kind of shunting recompression supercritical carbon dioxide thermoelectricity connection
Production system.
Background technique
Cogeneration of heat and power is a kind of technology for utilizing power station while generating electric power and available heat.Cogeneration of heat and power passes through energy
Cascade utilization and user demand Proper Match, the efficiency of energy utilization in power station greatly improved, be following China's firepower
One important development direction of power generation.China's cogeneration units mainly include two class of back pressure unit and extraction and condensing unit.Back pressure machine
The steam exhaust that group is discharged using steam turbine is high-efficient without cold source energy as heat supply；But after its heating demand determines,
Supply load also determines that the peak modulation capacity affected by hot loading limitation of electric load is serious therewith, belongs to " electricity determining by heat " of stricti jurise.
Extraction and condensing unit carries out heat supply by extracting steam turbine some vapor, and due to low pressure (LP) cylinder minimum condensing flow and boiler is minimum does not throw oil
The limitation of steady combustion load, although extraction and condensing unit has certain supply load peak modulation capacity, but its minimum supply load is generally also
Not less than 50%, and the efficiency of energy utilization of unit is lower than back pressure unit.
In order to solve the problems, such as existing for current thermoelectricity unit, substantially there are two types of approach: one is in existing cogeneration of heat and power skill
Technical, further optimization and the improvement of art improve its efficiency of energy utilization and flexibility, such as the power output technology of low pressure (LP) cylinder zero
Equal flexibilities modification measures, lithium bromide heat pump auxiliary heating even depth energy conservation measure；Another approach is the heat from power cycle
Mechanical foundation level carries out revolutionary innovation, and efficiency of generating unit, efficiency of energy utilization is substantially improved, and thoroughly solves bright with steam
Agree the problem for the thermoelectricity unit peak modulation capacity deficiency that circulation is power cycle, for example uses supercritical carbon dioxide power cycle.
Supercritical carbon dioxide power cycle is followed by the actual gas enclosed Bretton of working medium of supercritical carbon dioxide
Ring, entire cycle operation is more than carbon dioxide critical point (7.37MPa, 31 DEG C), the loop structure broad sense optimal close to theory
Carnot cycle, and with the raising of power generation parameter, the advantage of generating efficiency is more obvious.Supercritical carbon dioxide power cycle is in work
Matter parameter 32MPa, under the conditions of 620 DEG C, using current material and pollutant minimum discharge technology, generating efficiency can be small in 300MW
Capacitance grade unit breaks through 50%, suitable with following 700 DEG C of grade 1000MW large-capacity ultra-supercritical steam units.Another party
It is defeated with arbitrary proportion that thermoelectricity may be implemented since supercritical carbon dioxide circulation uses the limit backheat technology of full flow in face
Out, really realize that thermoelectricity is full decoupled.
However through investigating, the research about supercritical carbon dioxide circulation focuses mostly on pure generating set at present, to mention
Rising efficiency of generating unit is primary and foremost purpose, and the research for being related to cogeneration of heat and power is relatively fewer.Supercritical carbon dioxide few in number
The working-flow for also essentially only relating to Heating Season is studied in cogeneration of heat and power.However, for thermoelectricity unit, non-heating season
Unit efficiency, it is thermoelectricity unit emphasis in need of consideration that system between Heating Season and non-heating season, which converts complexity,
Problem.
Therefore, it is also desirable to a large amount of original sex work: firstly, by supercritical carbon dioxide recycle based on construct High Efficiency Thermal
Cogeneration system, and the process flow of Heating Season and non-heating season is refined, guarantee the electricity generation system in Heating Season and non-heating season
There are higher generating efficiency and efficiency of energy utilization；Secondly, the process flow of optimization Heating Season and non-heating season, guarantees its fortune
Row flexibility, and two kinds of process flows is made to be easy conversion.
Summary of the invention
It is overcritical to provide a kind of shunting recompression for the shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts
Carbon dioxide co-generation unit guarantees the electricity generation system in heating by proposing the process flow of Heating Season and non-heating season
Season and non-heating season have higher generating efficiency and efficiency of energy utilization, by the technique stream for optimizing Heating Season and non-heating season
Journey guarantees its operational flexibility, and two kinds of process flows is made to be easy conversion.
In order to achieve the above objectives, the utility model adopts the following technical solution:
A kind of shunting recompression supercritical carbon dioxide co-generation unit, which is characterized in that including the main compression of Heating Season
Machine, non-heating season main compressor, recompression machine, cryogenic regenerator, high temperature regenerator, boiler, high pressure turbine, the first generator,
Low pressure turbine, the second generator, forecooler and heat exchangers for district heating；Boiler include air cooling wall, reheating air cooling wall, high temperature superheater,
High temperature reheater, low temperature superheater, shunts economizer, SCR and air preheater at low-temperature reheater；Component in the system
Connection relationship is as follows:
When Heating Season is run, Heating Season main compressor and recompression machine are in parallel, outlet conduit and Guan Houyu high temperature backheat
Device cold side input port is connected with economizer entrance is shunted, and high temperature regenerator cold side outlet port pipe and shunting economizer exit pipeline are simultaneously
Air cooling wall, low temperature superheater and high temperature superheater after pipe successively with boiler are connected, and the outlet of high temperature superheater and high pressure are saturating
Flat entrance is connected, and high pressure turbine exports successively be gas-cooled with the reheating of boiler wall, low-temperature reheater and high temperature reheater phase
Connection, high temperature reheater outlet are successively connected with low pressure turbine and high temperature regenerator hot-side channel, and high temperature regenerator hot side is logical
Road outlet is divided into two-way, is connected respectively with the entrance of forecooler hot side and heat exchangers for district heating hot side, forecooler hot side outlet pipe
Road is with heat exchangers for district heating hot side outlet pipeline and Guan Houyu Heating Season main compressor is connected with the inlet duct of recompression machine；
When non-heating season is run, the outlet of non-heating season main compressor is through cryogenic regenerator cold side channel and the outlet of recompression machine
Pipeline converges, and Guan Houyu high temperature regenerator cold side input port is connected with economizer entrance is shunted, high temperature regenerator cold side outlet port
Successively it is connected with air cooling wall, low temperature superheater and the high temperature superheater of boiler after pipeline and shunting economizer exit pipeline and pipe
Logical, the outlet of high temperature superheater is connected with the entrance of high pressure turbine, and the outlet of high pressure turbine is successively gas-cooled with the reheating of boiler
Wall, low-temperature reheater are connected with high temperature reheater, high temperature reheater outlet successively with low pressure turbine, high temperature regenerator and low temperature
Regenerator hot-side channel is connected, and the outlet of cryogenic regenerator hot-side channel is divided into two-way, all the way pre-cooled device hot side and non-heating
Season, main compressor entrance was connected, and another way is directly connected with recompression machine entrance.
When Heating Season is run, non-heating season main compressor and cryogenic regenerator are not involved in work；When non-heating season is run, adopt
Warm season main compressor and heat exchangers for district heating are not involved in work.The main equipment of Heating Season operational mode and non-heating season operational mode can
It shares, the switching of both of which only needs the switching connected by pipeline can be realized.
The high pressure turbine, recompression machine and the first generator coaxle arrangement, the low pressure turbine, Heating Season main compressor
Or non-heating season main compressor and the second generator coaxle are arranged.
The utility model has the following beneficial effects:
A kind of shunting recompression supercritical carbon dioxide co-generation unit described in the utility model when specific operation,
Firstly, by supercritical carbon dioxide recycle based on the co-generation unit of high efficient and flexible that constructs, including Heating Season and Fei Cai
The process flow of warm season, compared to conventional Supercritical carbon dioxide thermoelectricity unit, when electricity generation system Heating Season is single reheat
Supercritical carbon dioxide Brayton cycle heat and power system, and using cryogenic regenerator hot side outlet working medium realize full flow supply
Heat recompresses supercritical carbon dioxide Brayton cycle pure electricity generation system for the shunting of single reheat when non-heating season, therefore should
Electricity generation system has higher generating efficiency and efficiency of energy utilization in Heating Season and non-heating season；Secondly, being adopted by what is optimized
By the full flow heat supply of cryogenic regenerator hot side outlet working medium when the process flow, i.e. Heating Season of warm season and non-heating season, it is aided with
Forecooler bypass is adjusted, and is realized that heat and power system thermoelectricity is full decoupled, is improved the operational flexibility of thermoelectricity unit, and two kinds of works
Skill process is easy conversion when Heating Season and non-heating season replace.
Detailed description of the invention
Fig. 1 is the process flow chart of the utility model Heating Season.
Fig. 2 is the process flow chart of the utility model non-heating season.
Wherein, 1H is Heating Season main compressor, 1N is non-heating season main compressor, 2 is recompression machine, 3 is low temperature backheat
Device, 4 be high temperature regenerator, 5 be boiler, 6 be high pressure turbine, 7 be the first generator, 8 be low pressure turbine, 9 be the second generator,
10 be forecooler, 11 be heat exchangers for district heating, 51 be air cooling wall, 52 be reheating air cooling wall, 53 be high temperature superheater, 54 be high temperature again
Hot device, 55 be low-temperature reheater, 56 be low temperature superheater, 57 be shunt economizer, 58 be SCR, 59 be air preheater.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As depicted in figs. 1 and 2, a kind of shunting of the utility model recompresses supercritical carbon dioxide co-generation unit, packet
Include Heating Season main compressor 1H, non-heating season main compressor 1N, recompression machine 2, cryogenic regenerator 3, high temperature regenerator 4, boiler
5, high pressure turbine 6, the first generator 7, low pressure turbine 8, the second generator 9, forecooler 10 and heat exchangers for district heating 11；Boiler 5 wraps
Include air cooling wall 51, reheating air cooling wall 52, high temperature superheater 53, high temperature reheater 54, low-temperature reheater 55, low temperature superheater 56,
Shunt economizer 57, SCR58 and air preheater 59.
As shown in Figure 1, Heating Season main compressor 1H and recompression machine 2 are in parallel, and outlet conduit is simultaneously managed when Heating Season is run
It is connected afterwards with 4 cold side input port of high temperature regenerator and shunting 57 entrance of economizer, 4 cold side outlet port pipe of high temperature regenerator and shunting
Successively it is connected with the air cooling wall 51 of boiler 5, low temperature superheater 56 and high temperature superheater 53 after 57 outlet conduit of economizer and pipe,
The outlet of high temperature superheater 53 is connected with the entrance of high pressure turbine 6, high pressure turbine 6 outlet successively with the hot gas again of boiler 5
Cold wall 52, low-temperature reheater 55 are connected with high temperature reheater 54, high temperature reheater 54 outlet successively with low pressure turbine 8 and high temperature
4 hot-side channel of regenerator is connected, 4 hot-side channel of high temperature regenerator outlet is divided into two-way, respectively with 10 hot side of forecooler and heat
The entrance of 11 hot side of net heater is connected, and 10 hot side outlet pipeline of forecooler and 11 hot side outlet pipeline of heat exchangers for district heating are simultaneously managed
It is connected afterwards with the inlet duct of Heating Season main compressor 1H and recompression machine 2.
As shown in Fig. 2, non-heating season main compressor 1N is exported through 3 cold side channel of cryogenic regenerator when non-heating season is run
Converge with 2 outlet conduit of recompression machine, and 4 cold side input port of Guan Houyu high temperature regenerator is connected with 57 entrance of economizer is shunted,
4 cold side outlet port pipe of high temperature regenerator and shunt after 57 outlet conduit of economizer and pipe successively with air cooling wall 51, the low temperature of boiler 5
Superheater 56 is connected with high temperature superheater 53, and the outlet of high temperature superheater 53 is connected with the entrance of high pressure turbine 6, and high pressure is saturating
Flat 6 outlet is successively connected with the reheating of boiler 5 air cooling wall 52, low-temperature reheater 55 and high temperature reheater 54, high temperature reheating
The outlet of device 54 is successively connected with low pressure turbine 8, high temperature regenerator 4 and 3 hot-side channel of cryogenic regenerator, 3 heat of cryogenic regenerator
Wing passage outlet is divided into two-way, and pre-cooled 10 hot side of device is connected with non-heating season main compressor 1N entrance all the way, and another way is straight
It connects and is connected with 2 entrance of recompression machine.
A kind of shunting of high efficient and flexible recompresses supercritical carbon dioxide co-generation unit, Heating Season operation
When, non-heating season main compressor 1N and cryogenic regenerator 3 are not involved in work；When non-heating season is run, Heating Season main compressor 1H
Work is not involved in heat exchangers for district heating 11.The main equipment of Heating Season operational mode and non-heating season operational mode can share, and two kinds
The switching of mode only needs the switching connected by pipeline can be realized.
As preferred embodiments of the present invention, the high pressure turbine 6, recompression machine 2 and the first generator 7 are coaxial
Arrangement, the low pressure turbine 8, Heating Season main compressor 1H or non-heating season main compressor 1N and the second generator 9 are coaxially arranged.
The carrying out practically method of the utility model are as follows:
As shown in Figure 1, when Heating Season is run, the supercritical carbon dioxide point of pre-cooled device 10 and the cooling of heat exchangers for district heating 11
For two-way, enters Heating Season main compressor 1H all the way and compressed, another way enters recompression machine 2 and compressed.After boosting
Supercritical carbon dioxide is again split into two-way after converging, enter shunt the heating of economizer 57 all the way, and another way enters high temperature backheat
Device 4 heats up, and two-way is successively heated by the air cooling wall 51 of boiler 5, low temperature superheater 56 and high temperature superheater 53 after converging, and is formed
The main gas of high temperature and pressure.Main gas is after the acting of high pressure turbine 6 successively by reheating the air cooling wall 52,55 and of low-temperature reheater of boiler 5
High temperature reheater 54 heats, and forms hot gas again.Hot gas is divided into two after the cooling of high temperature regenerator 4 after the acting of low pressure turbine 8 again
Road enters heat exchangers for district heating 11 all the way and carries out heat supply, and another way enters forecooler 10 for extra waste heat discharge to environment.Extremely
This, constitutes the Heating Season process flow for shunting recompression supercritical carbon dioxide co-generation unit.
As shown in Fig. 2, the cooling supercritical carbon dioxide of forecooler 10 is through the main compression of non-heating season when non-heating season is run
It after machine 1N boosting, heats up through cryogenic regenerator 3, the supercritical carbon dioxide after boosting after heating with recompression machine 2 converges.Converge
Working medium afterwards is again split into two-way, enters shunt the heating of economizer 57 all the way, and another way enters the heating of high temperature regenerator 4, two-way
It is successively heated by the air cooling wall 51 of boiler 5, low temperature superheater 56 and high temperature superheater 53 after converging, forms high temperature and pressure master
Gas.Main gas is after the acting of high pressure turbine 6 successively by reheating air cooling wall 52, low-temperature reheater 55 and the high temperature reheater of boiler 5
54 heating, form hot gas again.Hot gas is after the acting of low pressure turbine 8 again, successively after high temperature regenerator 4, cryogenic regenerator 3 cool down
It is divided into two-way, non-heating season main compressor 1N entrance will be returned to by entering forecooler 10 all the way after extra waste heat discharge to environment,
Another way then returns to 2 entrance of recompression machine.So far, it constitutes and shunts the non-of recompression supercritical carbon dioxide co-generation unit
Heating Season process flow.
Using it is above-mentioned when specific operation, firstly, by supercritical carbon dioxide recycle based on the heat of high efficient and flexible that constructs
Cogeneration system, the process flow including Heating Season and non-heating season should compared to conventional Supercritical carbon dioxide thermoelectricity unit
Electricity generation system has higher generating efficiency and efficiency of energy utilization in Heating Season and non-heating season；Secondly, being adopted by what is optimized
The process flow of warm season and non-heating season, improves the operational flexibility of thermoelectricity unit, and two kinds of process flows in Heating Season and
Conversion is easy when non-heating season replaces.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done,
It should be included within the scope of protection of this utility model.
Claims (2)
1. a kind of shunting recompresses supercritical carbon dioxide co-generation unit, which is characterized in that including Heating Season main compressor
(1H), non-heating season main compressor (1N), recompression machine (2), cryogenic regenerator (3), high temperature regenerator (4), boiler (5), height
Press turbine (6), the first generator (7), low pressure turbine (8), the second generator (9), forecooler (10) and heat exchangers for district heating (11)；
Boiler (5) includes air cooling wall (51), reheating air cooling wall (52), high temperature superheater (53), high temperature reheater (54), low-temperature reheater
(55), low temperature superheater (56), shunting economizer (57), SCR (58) and air preheater (59)；The company of component in the system
It is as follows to connect relationship:
When Heating Season is run, Heating Season main compressor (1H) and recompression machine (2) are in parallel, outlet conduit and Guan Houyu high temperature time
Hot device (4) cold side input port is connected with economizer (57) entrance is shunted, and high temperature regenerator (4) cold side outlet port pipe and shunting save coal
After device (57) outlet conduit and pipe successively with the air cooling wall (51) of boiler (5), low temperature superheater (56) and high temperature superheater (53)
Be connected, the outlet of high temperature superheater (53) is connected with the entrance of high pressure turbine (6), the outlet of high pressure turbine (6) successively with
Reheating air cooling wall (52) of boiler (5), low-temperature reheater (55) are connected with high temperature reheater (54), and high temperature reheater (54) goes out
Mouth is successively connected with low pressure turbine (8) and high temperature regenerator (4) hot-side channel, the outlet point of high temperature regenerator (4) hot-side channel
For two-way, it is connected respectively with the entrance of forecooler (10) hot side and heat exchangers for district heating (11) hot side, forecooler (10) hot side goes out
Mouthful pipeline and heat exchangers for district heating (11) hot side outlet pipeline and Guan Houyu Heating Season main compressor (1H) and recompress entering for machine (2)
Mouth pipeline is connected；
When non-heating season is run, non-heating season main compressor (1N) outlet is through cryogenic regenerator (3) cold side channel and recompression machine
(2) outlet conduit converges, and Guan Houyu high temperature regenerator (4) cold side input port is connected with economizer (57) entrance is shunted, high temperature
Regenerator (4) cold side outlet port pipe and shunt after economizer (57) outlet conduit and pipe successively with the air cooling wall (51) of boiler (5),
Low temperature superheater (56) is connected with high temperature superheater (53), the outlet of high temperature superheater (53) and the entrance of high pressure turbine (6)
Be connected, the outlet of high pressure turbine (6) successively with the reheating of boiler (5) air cooling wall (52), low-temperature reheater (55) and high temperature again
Hot device (54) is connected, high temperature reheater (54) outlet successively with low pressure turbine (8), high temperature regenerator (4) and cryogenic regenerator
(3) hot-side channel is connected, cryogenic regenerator (3) hot-side channel outlet is divided into two-way, all the way pre-cooled device (10) hot side with it is non-
Heating Season main compressor (1N) entrance is connected, and another way is directly connected with recompression machine (2) entrance.
2. a kind of shunting according to claim 1 recompresses supercritical carbon dioxide co-generation unit, which is characterized in that
The high pressure turbine (6), recompression machine (2) and the first generator (7) are coaxially arranged, the low pressure turbine (8), the main pressure of Heating Season
Contracting machine (1H) or non-heating season main compressor (1N) and the second generator (9) are coaxially arranged.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139147A (en) * | 2018-09-14 | 2019-01-04 | 西安热工研究院有限公司 | A kind of shunting recompression supercritical carbon dioxide co-generation unit and operation method |
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2018
- 2018-09-14 CN CN201821502978.8U patent/CN208831056U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139147A (en) * | 2018-09-14 | 2019-01-04 | 西安热工研究院有限公司 | A kind of shunting recompression supercritical carbon dioxide co-generation unit and operation method |
| CN109139147B (en) * | 2018-09-14 | 2023-08-01 | 西安热工研究院有限公司 | Split-flow recompression supercritical carbon dioxide cogeneration system and operation method |
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