CN206530370U - Using the Brayton Cycle system of supercritical carbon dioxide - Google Patents
Using the Brayton Cycle system of supercritical carbon dioxide Download PDFInfo
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- CN206530370U CN206530370U CN201720083907.8U CN201720083907U CN206530370U CN 206530370 U CN206530370 U CN 206530370U CN 201720083907 U CN201720083907 U CN 201720083907U CN 206530370 U CN206530370 U CN 206530370U
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- regenerator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a kind of Brayton Cycle system for the use supercritical carbon dioxide for belonging to power station energy-saving field, the circulatory system is main to be made up of boiler hearth heating surface, heated surface at the end of boiler, air preheater, boiler back end ductwork, cycle fluid bypass duct, high temperature regenerator, middle temperature regenerator, cryogenic regenerator, working medium turbine, high temperature compressor, a cold pressing mechanism of qi and cooler.By the way that boiler hearth heating surface is rearranged, the bypass of high temperature regenerator is set, so as to match newly-designed supercritical carbon dioxide cycle heat exchange demand；Improve cycle efficieny；Improve low-temperature flue gas utility；Improve air preheater caloric receptivity distribution, the design heat exchange amount for being optimized to correspondence air preheater in being circulated substantially with coal-fired steam is identical；Using a cold compression technology, cycle efficieny is improved, the heat exchange for optimizing cooler is interval, is allowed to match with water-cooling system.In addition the system architecture is simple, and operational efficiency is high, there is preferable application prospect in engineering.
Description
Technical field
The utility model belongs to power station energy-saving field, more particularly to a kind of Brayton cycle of use supercritical carbon dioxide
System.
Background technology
Supercritical carbon dioxide (S-CO2) Brayton cycle is with carbon dioxide (critical pressure in a supercritical state
7.38MPa, 31.05 DEG C of critical-temperature) it is working medium, a kind of endless form of energy conversion is realized using Brayton cycle principle.
It is to utilize high density of the fluid near super critical point, low glutinous using supercritical fluid as cycle fluid
Property etc. advantage, reduction power input to compressor, improve cycle efficieny.And supercritical carbon dioxide has nontoxic, rich reserves, cost
The features such as low, performance stabilization, big density, critical-temperature and relatively low pressure, it is considered as one of optimum cycle working medium.Current big rule
The Steam Power Circulation that mould is used is compared, the energy under supercritical carbon dioxide Brayton cycle high temperature (being generally greater than 400 DEG C)
Conversion efficiency is higher, and its system compact, and equipment volume is small, and (volume of turbine system and cooling device just corresponds to vapour system
The ten of corresponding device volume/mono-), it is easy to modularization construction, possess good potential economy；With conventional gas Bretton
Circulation is compared, and the characteristics of its compression process parameter is located at working medium Near The Critical Point causes compression power consumption to significantly reduce, cycle efficieny
Significantly improve.
Supercritical carbon dioxide is proposed as the working medium that power is followed in nineteen sixties, but at that time due to skill
Art is limited, and is not widely used.In recent years, with the raising of technical merit, supercritical carbon dioxide is in nuclear reactor side
The application in face has obtained extensive concern and the research of domestic and foreign scholars and research institution, and it is combined with tower type solar heat dump
Carry out extensively, but for occupying the coal-burning boiler of main generation mode, the application of supercritical carbon dioxide wherein at present
But develop more slow.
The energy-saving and emission-reduction of Large-scale fire-electricity unit are the important energy source strategies of China.For adapt to electricity market fast development and
The immense pressure of energy-saving and emission-reduction, we improve the efficiency of power plant in the urgent need to finding new approach, and this turns into each power plant day
The problem that benefit is paid attention to.
Utility model content
The purpose of this utility model is in view of the shortcomings of the prior art, it is proposed that a kind of cloth of use supercritical carbon dioxide
The thunder circulatory system, it is characterised in that：Boiler hearth heating surface is redesigned, is sequentially arranged in boiler back end ductwork
Heated surface at the end of boiler 4 and air preheater 3；The outlet of boiler hearth heating surface 1 is connected with the entrance of working medium turbine 5, working medium turbine 5
Outlet is connected with high temperature regenerator 6, and high temperature regenerator 6 is connected with middle temperature regenerator 7, middle temperature regenerator 7 and the phase of cryogenic regenerator 8
Even, cryogenic regenerator 8 is exported to be connected with the condenser 12 of high temperature compressor 9 and first respectively, and the outlet of high temperature compressor 9 is returned with middle temperature
Connected between hot device 7 and cryogenic regenerator 8 by pipeline 15, pipeline 14 is passed through between high temperature regenerator 6 and middle temperature regenerator 7
High temperature regenerator bypass 16, high temperature backheat are reconnected on connection, the pipeline 14 between high temperature regenerator 6 and middle temperature regenerator 7
Device bypass 16 is exported by heated surface at the end of boiler 4 and high temperature regenerator 6 is together imported into boiler hearth heating surface 1；First coagulates
Vapour device 12 exports the cold pressing mechanism of qi 10 between first and is connected, and the outlet of mechanism of qi 10 is cold-pressed between first and is connected with the second condenser 13, and second
Condenser 13 exports the cold pressing mechanism of qi 11 between second and is connected, and the outlet of mechanism of qi 11 is cold-pressed between second and is connected with cryogenic regenerator 8.
Described that high temperature regenerator bypass 16 is set between high temperature regenerator 6 and middle temperature regenerator 7, its inlet temperature is
320 DEG C, outlet temperature is 470 DEG C, so as to be effectively utilized 350 DEG C -500 DEG C of low-temperature flue gas heat, improves system circulation
Efficiency.
Cold compression between described two cold pressing mechanisms of qi, improves the cycle efficieny of the circulatory system, makes the heat exchange of cooler
Temperature is maintained between 30 DEG C -80 DEG C, good with water-cooling system Temperature Matching.
The boiler back end ductwork is sequentially arranged heated surface at the end of boiler 4 and air preheater 3, makes air in the circulation pre-
Hot device heat exchange flue gas scope is at 100 DEG C -350 DEG C, the design of corresponding air preheater during heat exchange amount is circulated with coal-fired steam substantially
Heat exchange amount is identical, so as to optimize the heat-transfer character of air preheater.
The beneficial effects of the utility model are：
1. the system is provided with the bypass of high temperature regenerator outside high temperature regenerator, partly come from the working medium of middle temperature regenerator
Absorption low-temperature flue gas heat in boiler back end ductwork is entered directly into, the working medium finally exported with high temperature regenerator is mixed, together
It is imported into boiler hearth heating surface.This bypass optimizes system architecture, improves the absorbent properties of boiler low-temperature fume, inhales
Flue gas heat between having received 350 DEG C -500 DEG C, improves system circulation efficiency.
2. boiler hearth heating surface is rearranged, to match newly-designed supercritical carbon dioxide cycle heat exchange characteristic,
So that heat transfer efficient is compact, and it ensure that the stable operation of boiler.
3. cold compression technology between the system is used, not only increases system circulation efficiency, also optimizes the heat exchange of condenser
Temperature range, is allowed to mutually match with water-cooling system.
4. the system is without reheat vapor cycle, simplifies control system and arranged with burner hearth, with further improved efficiency space,
Good application prospect is had in engineering.As control system is advanced enough, can further lift this by adding reheat vapor cycle is
System effect.
5. the system arrangement applicability is wide, it can decide whether to adopt according to unit parameter and the difference of the type of cooling
With a cold compression.
Brief description of the drawings
Fig. 1 is supercritical carbon dioxide Brayton Cycle system schematic diagram.
Embodiment
The utility model proposes a kind of Brayton Cycle system of use supercritical carbon dioxide.It is below in conjunction with the accompanying drawings and real
Example is explained.
As shown in Figure 1 be supercritical carbon dioxide Brayton Cycle system schematic diagram, the utility model to boiler furnace by
Hot face is redesigned, and heated surface at the end of boiler 4 and air preheater 3 are sequentially arranged in boiler back end ductwork；Boiler Furnace
Thorax heating surface 1 outlet is connected with the entrance of working medium turbine 5, working medium turbine 5 export be connected with high temperature regenerator 6, high temperature regenerator 6 and
Middle temperature regenerator 7 be connected, middle temperature regenerator 7 is connected with cryogenic regenerator 8, cryogenic regenerator 8 export respectively with high temperature compressor 9
It is connected with the first condenser 12, high temperature compressor 9 is exported to be connected between middle temperature regenerator 7 and cryogenic regenerator 8 by pipeline 15
Connect, connected between high temperature regenerator 6 and middle temperature regenerator 7 by pipeline 14, high temperature regenerator 6 and middle temperature regenerator 7 it
Between pipeline 14 on reconnect high temperature regenerator bypass 16, heated surface at the end of boiler 4 and high temperature are passed through in high temperature regenerator bypass 16
Regenerator 6, which is exported, is together imported into boiler hearth heating surface 1；So that boiler hearth heating surface and newly-designed overcritical dioxy
Change carbon cycle matching, optimize heating surface arrangement, it is ensured that the Effec-tive Function of boiler.
First condenser 12 of the circulatory system exports the cold pressing mechanism of qi 10 between first and is connected, and mechanism of qi 10 is cold-pressed between first
Outlet is connected with the second condenser 13, and the second condenser 13 exports the cold pressing mechanism of qi 11 between second and is connected, and mechanism of qi is cold-pressed between second
11 outlets are connected with cryogenic regenerator 8, i.e., cold compression technology between mechanism of qi use is cold-pressed between two, the circulation of the circulatory system is improved
Efficiency, makes the heat-exchange temperature of cooler maintain between 30 DEG C -80 DEG C, good with water-cooling system Temperature Matching.
Described that high temperature regenerator bypass 16 is set between high temperature regenerator 6 and middle temperature regenerator 7, its inlet temperature is
320 DEG C, outlet temperature is 470 DEG C, so as to be effectively utilized 350 DEG C -500 DEG C of low-temperature flue gas heat, improves system circulation
Efficiency.
The boiler back end ductwork is sequentially arranged heated surface at the end of boiler 4 and air preheater 3, makes air in the circulation pre-
Hot device heat exchange flue gas scope is at 100 DEG C -350 DEG C, the design of corresponding air preheater during heat exchange amount is circulated with coal-fired steam substantially
Heat exchange amount is identical, so as to optimize the heat-transfer character of air preheater.
The utility model is proposed first to be set by high temperature regenerator in supercritical carbon dioxide Brayton Cycle system
Road, a part of middle temperature regenerator exports the high temperature regenerator after working medium is entered directly into；The middle temperature regenerator of another part goes out
Mouth working medium is introduced into the heat absorption of burner hearth afterbody heat-transfer surface, so as to absorb burner hearth afterbody waste heat, during reduction air preheater design not
Necessary heat absorption, and improve system circulation efficiency.It has been finally reached and has fully rationally been distributed using flue-gas temperature in boiler, classification
It is rationally effective by system and fire coal while ensureing that supercritical carbon dioxide Brayton cycle is efficient using gas energy
Boiler is coupled together, and solving afterbody low-temperature flue gas efficient and rational can not utilize, ultra-specification arrangement air preheater caloric receptivity
Problem.Meanwhile, the present invention can flexible arrangement (multistage) reheat vapor cycle and a cold compression as needed so that overall overcritical dioxy
Change carbon Bretton circulates in the application prospect of engineering in practice and greatly improved, and exploitativeness is notable.
Claims (4)
1. a kind of Brayton Cycle system of use supercritical carbon dioxide, it is characterised in that：To boiler hearth heating surface (1) weight
New design, heated surface at the end of boiler (4) and air preheater (3) are sequentially arranged in boiler back end ductwork (2)；Boiler furnace is heated
Face (1) outlet is connected with working medium turbine (5) entrance, and working medium turbine (5) outlet is connected with high temperature regenerator (6), high temperature regenerator
(6) it is connected with middle temperature regenerator (7), middle temperature regenerator (7) is connected with cryogenic regenerator (8), cryogenic regenerator (8) outlet difference
It is connected with high temperature compressor (9) and the first condenser (12), high temperature compressor (9) outlet is returned with middle temperature regenerator (7) and low temperature
Connected between hot device (8) by pipeline (15), between high temperature regenerator (6) and middle temperature regenerator (7) by pipeline (14) even
Connect, high temperature regenerator bypass (16) is reconnected on the pipeline (14) between high temperature regenerator (6) and middle temperature regenerator (7), it is high
Warm regenerator bypass (16) by heated surface at the end of boiler (4) and high temperature regenerator (6) outlet be together imported into boiler furnace by
Hot face (1)；First condenser (12) is exported to be connected with being cold-pressed mechanism of qi (10) between first, and mechanism of qi (10) outlet and the are cold-pressed between first
Two condensers (13) are connected, and the second condenser (13) outlet is connected with being cold-pressed mechanism of qi (11) between second, and mechanism of qi is cold-pressed between second
(11) outlet is connected with cryogenic regenerator (8).
2. the Brayton Cycle system of supercritical carbon dioxide is used according to claim 1, it is characterised in that：It is described in height
High temperature regenerator bypass (16) is set between warm regenerator (6) and middle temperature regenerator (7), and its inlet temperature is 320 DEG C, outlet temperature
Spend for 470 DEG C, so as to be effectively utilized 350 DEG C -500 DEG C of low-temperature flue gas heat, improve system circulation efficiency.
3. the Brayton Cycle system of supercritical carbon dioxide is used according to claim 1, it is characterised in that：It is described two
Between cold pressing mechanism of qi use between cold compression, improve the cycle efficieny of the circulatory system, make cooler heat-exchange temperature maintain 30 DEG C-
It is good with water-cooling system Temperature Matching between 80 DEG C.
4. the Brayton Cycle system of supercritical carbon dioxide is used according to claim 1, it is characterised in that：The boiler
Back-end ductwork is sequentially arranged heated surface at the end of boiler (4) and air preheater (3), makes air preheater heat exchange flue gas in the circulation
Scope is at 100 DEG C -350 DEG C, and the design heat exchange amount of correspondence air preheater is identical during heat exchange amount is circulated with coal-fired steam substantially, from
And optimize the heat-transfer character of air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720083907.8U CN206530370U (en) | 2017-01-22 | 2017-01-22 | Using the Brayton Cycle system of supercritical carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720083907.8U CN206530370U (en) | 2017-01-22 | 2017-01-22 | Using the Brayton Cycle system of supercritical carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
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| CN206530370U true CN206530370U (en) | 2017-09-29 |
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| CN201720083907.8U Expired - Fee Related CN206530370U (en) | 2017-01-22 | 2017-01-22 | Using the Brayton Cycle system of supercritical carbon dioxide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106870037A (en) * | 2017-01-22 | 2017-06-20 | 华北电力大学 | A kind of supercritical carbon dioxide Brayton Cycle system |
| CN108005744A (en) * | 2017-12-26 | 2018-05-08 | 华北电力大学 | Supercritical CO2The machine furnace cooling of circulation can recycle and power generation and heat supply integral system |
| CN113623039A (en) * | 2021-09-17 | 2021-11-09 | 西安热工研究院有限公司 | Air-carbon dioxide combined cycle power generation system and method |
| CN108425711B (en) * | 2018-03-27 | 2023-06-06 | 哈尔滨电气股份有限公司 | Three-turbine coaxial arrangement supercritical carbon dioxide circulating power generation system for gas turbine waste heat recovery |
-
2017
- 2017-01-22 CN CN201720083907.8U patent/CN206530370U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106870037A (en) * | 2017-01-22 | 2017-06-20 | 华北电力大学 | A kind of supercritical carbon dioxide Brayton Cycle system |
| CN108005744A (en) * | 2017-12-26 | 2018-05-08 | 华北电力大学 | Supercritical CO2The machine furnace cooling of circulation can recycle and power generation and heat supply integral system |
| CN108005744B (en) * | 2017-12-26 | 2023-08-29 | 华北电力大学 | Supercritical CO 2 Circulating machine furnace cold energy recovery and power generation integrated heat supply method |
| CN108425711B (en) * | 2018-03-27 | 2023-06-06 | 哈尔滨电气股份有限公司 | Three-turbine coaxial arrangement supercritical carbon dioxide circulating power generation system for gas turbine waste heat recovery |
| CN113623039A (en) * | 2021-09-17 | 2021-11-09 | 西安热工研究院有限公司 | Air-carbon dioxide combined cycle power generation system and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170929 Termination date: 20210122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |