CN112554974B - Non-compression distributed carbon dioxide power generation system - Google Patents
Non-compression distributed carbon dioxide power generation system Download PDFInfo
- Publication number
- CN112554974B CN112554974B CN202011210766.4A CN202011210766A CN112554974B CN 112554974 B CN112554974 B CN 112554974B CN 202011210766 A CN202011210766 A CN 202011210766A CN 112554974 B CN112554974 B CN 112554974B
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- power generation
- generation system
- turbine
- working medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
-
- 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
- F01K13/00—General layout or general methods of operation of complete plants
-
- 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
- F01K21/00—Steam engine plants not otherwise provided for
-
- 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
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a distributed carbon dioxide power generation system without a compression process, wherein a carbon dioxide steel cylinder is used for directly obtaining a carbon dioxide working medium with normal temperature and high pressure, the carbon dioxide working medium enters a turbine to expand to do work, and an organic amine solution absorption tank is used for recovering after the work is finished. And the carbon dioxide working medium in the absorption tank enters a gas storage tank through heating desorption. And the regenerated absorbent organic amine solution enters the absorption pool again to absorb the carbon dioxide. The power generation system has no compression process, and simultaneously adopts a distributed arrangement method to conveniently adjust the power according to the requirements of back-end users. The invention has the advantages that: the system has the advantages of fewer components, low cost, convenience in design, control, operation and maintenance, high reliability, capability of effectively reducing emission and meeting the requirement of environmental protection.
Description
Technical Field
The invention belongs to the field of carbon dioxide power generation, and particularly relates to a compression-process-free distributed carbon dioxide power generation system.
Background
In recent years, supercritical carbon dioxide working media are widely applied to various power generation systems, and brayton cycle adopted under the background of nuclear energy, solar energy, geothermal energy, waste heat utilization and the like is widely concerned. The excellent characteristics of the supercritical carbon dioxide Brayton cycle are mainly shown in the following steps: the power density is high, and the system volume is small; compared with a gas turbine, the temperature is low, and high-temperature resistant materials are not needed; the compression factor is small, and the compression power consumption can be reduced; belongs to single-phase circulation, has no phase change process and does not need to use a condenser. In the development process, the realization of the supercritical carbon dioxide brayton cycle is limited by the following points: working media in the system are difficult to maintain in a supercritical state all the time, and once the trans-critical physical property changes, the density and specific heat of the working media are changed greatly and are difficult to control; the single-stage pressure ratio of the compressor is difficult to improve; the cooling and sealing reliability of key equipment such as a compressor, a turbine and the like is insufficient; the cost of the compressor, the turbine and other equipment is high, and the economy is poor.
In summary, since the supercritical carbon dioxide brayton cycle system has many key components, it is difficult to ensure the reliability of each component during operation and achieve the required system efficiency. Therefore, it is necessary to further improve the practicability, reliability and economy of carbon dioxide power generation in consideration of simplification of the existing brayton cycle power generation system, particularly, a compressor component having a large difficulty in pneumatic design.
Disclosure of Invention
The invention aims to provide a distributed carbon dioxide power generation system without a compression process aiming at the defects of the prior art, provides a low-cost and convenient energy form by extracting a working medium from a carbon dioxide steel cylinder, generating power in a turbine and recovering the working medium, and has important engineering significance and wide application prospect.
The invention is realized by adopting the following technical scheme:
a distributed carbon dioxide power generation system without a compression process comprises a carbon dioxide power generation system and a carbon dioxide recovery system, wherein the carbon dioxide power generation system comprises a steel cylinder, a carbon dioxide turbine, a power generator and a carbon dioxide absorption pool; extracting a normal-temperature high-pressure liquid carbon dioxide working medium from a carbon dioxide steel cylinder, wherein the pressure is 7MPa, the temperature is 25 ℃, and the working medium enters a carbon dioxide turbine to expand to do work; the carbon dioxide turbine is coaxially connected with the generator, and the carbon dioxide working medium drives the carbon dioxide turbine and the generator to rotate in the expansion process, so that electric energy is generated; the outlet pressure of the carbon dioxide turbine is 0.6MPa, the outlet temperature depends on the isentropic efficiency of the turbine, and the carbon dioxide working medium at the outlet is in a gas-liquid mixed state and enters a carbon dioxide absorption pool; and recycling and reusing the carbon dioxide working medium through a carbon dioxide recovery system.
The invention has the further improvement that the carbon dioxide recovery system comprises a carbon dioxide absorption tank, a mixed liquid pump, a mixed liquid heater and a carbon dioxide gas storage tank, the mixed liquid pump pumps the organic amine solution which absorbs the carbon dioxide working medium in the carbon dioxide absorption tank into the mixed liquid heater, carbon dioxide gas is desorbed by heating to obtain a regenerated absorbent organic amine solution, the desorbed carbon dioxide enters the carbon dioxide gas storage tank for recovery, and the regenerated absorbent organic amine solution enters the carbon dioxide absorption tank again to absorb the working medium discharged by the carbon dioxide power generation system.
In a further improvement of the invention, the organic amine solution in the carbon dioxide absorption cell is sodium glycinate.
In a further improvement of the invention, the organic amine solution in the carbon dioxide absorption cell is enamine.
The invention is further improved in that the organic amine solution in the carbon dioxide absorption pool is ethanolamine.
The invention has the further improvement that the isentropic enthalpy drop corresponding to the inlet and outlet working medium states of the carbon dioxide turbine is 33.77kJ/kg, and the corresponding outlet isentropic temperature is-53.11 ℃; the number Z of carbon dioxide turbines required in the distributed carbon dioxide power generation system is calculated as follows:
where P is the power demanded by the back end user in kW,
for mass flow of a single carbon dioxide turbine, Δ hisThe isentropic enthalpy drop of the carbon dioxide turbine is expressed in kJ/kg, and eta is the isentropic efficiency of the carbon dioxide turbine.
Compared with the prior art, the invention has at least the following beneficial technical effects:
the invention provides a compression-process-free distributed carbon dioxide power generation system, aiming at the problem that a supercritical carbon dioxide Brayton cycle power generation system is difficult to realize high-efficiency operation. In a traditional supercritical carbon dioxide Brayton cycle, key components such as a turbine, a compressor, a heater, a cooler, a heat regenerator and the like are arranged, and it is very difficult to ensure the normal and efficient operation of all the key components. Therefore, the invention simplifies the compression process by using the carbon dioxide steel cylinder, directly obtains the high-pressure working medium to do work through expansion, and reduces the emission of carbon dioxide by adopting a recovery mode of the absorption tank. The power generation system has fewer components, low cost, convenient design, control, operation and maintenance and high reliability, and can be used in small-sized power equipment with smaller power consumption requirements, such as farming, small-sized factories and other scenes. By adopting a distributed arrangement method, the power can be conveniently adjusted according to the requirements of back-end users. Meanwhile, the carbon dioxide absorption tank is adopted for recycling, so that the emission is effectively reduced, and the environment-friendly requirement is met. In conclusion, the method has important engineering significance and wide application prospect.
Drawings
Fig. 1 is a carbon dioxide power generation system diagram of a distributed carbon dioxide power generation system without a compression process of the present invention.
Fig. 2 is a carbon dioxide recovery system diagram of a distributed carbon dioxide power generation system without a compression process of the present invention.
Description of reference numerals:
the system comprises a carbon dioxide steel bottle 1, a carbon dioxide turbine 2, a power generator 3, a carbon dioxide absorption tank 4, a mixed liquid pump 5, a mixed liquid heater 6 and a carbon dioxide gas storage tank 7.
Detailed Description
The invention will be further explained with reference to the drawings.
The invention provides a compression-process-free distributed carbon dioxide power generation system which comprises a carbon dioxide power generation system and a carbon dioxide recovery system.
Referring to fig. 1, the carbon dioxide power generation system includes components including a carbon dioxide cylinder 1, a carbon dioxide turbine 2, a generator 3, and a carbon dioxide absorption tank 4. Wherein the working medium in the carbon dioxide absorption tank 4 is organic amine solution such as sodium glycinate or enamine, ethanolamine and the like.
The working process of the distributed carbon dioxide power generation system is as follows: extracting a normal-temperature high-pressure liquid carbon dioxide working medium from a carbon dioxide steel cylinder 1, wherein the pressure is 7MPa, the temperature is 25 ℃, and the working medium enters a carbon dioxide turbine 2 for expansion. The carbon dioxide turbines 2 are coaxially connected with the generator 3, and the carbon dioxide working medium drives the carbon dioxide turbines 2 and the generator 3 to rotate to do work in the expansion process to generate electric energy. The outlet pressure of the distributed carbon dioxide turbine 2 is 0.6MPa, the outlet temperature depends on the isentropic efficiency of the turbine, and the carbon dioxide working medium at the outlet is in a gas-liquid mixed state and enters the carbon dioxide absorption pool 4 for recovery and reuse.
The physical properties of the carbon dioxide are checked, the isentropic enthalpy drop corresponding to the working medium states of the inlet and the outlet of the carbon dioxide turbine 2 is 33.77kJ/kg, and the isentropic temperature corresponding to the outlet is-53.11 ℃. The number Z of carbon dioxide turbines 2 required in the distributed carbon dioxide power generation system is calculated as follows:
where P is the power demanded by the back end user in kW,
for the mass flow of the individual carbon dioxide turbines 2,. DELTA.hisIs the isentropic enthalpy drop of the carbon dioxide turbine 2, with the unit of kJ/kg, and eta is the isentropic efficiency of the carbon dioxide turbine 2.
Referring to fig. 2, the carbon dioxide recovery system includes a carbon dioxide absorption tank 4, a mixed liquid pump 5, a mixed liquid heater 6, and a carbon dioxide gas tank 7.
The recovery process of the carbon dioxide working medium comprises the following steps: and pumping the organic amine solution which absorbs the carbon dioxide working medium in the carbon dioxide absorption tank 4 into a mixed solution heater 6 by a mixed solution pump 5, desorbing carbon dioxide gas by a heating method, and simultaneously obtaining a regenerated absorbent organic amine solution. The desorbed carbon dioxide gas enters a carbon dioxide gas storage tank 7 for recovery, and the regenerated absorbent organic amine solution enters a carbon dioxide absorption tank 4 again for recycling to absorb working media discharged by a carbon dioxide power generation system.
Claims (4)
1. A distributed carbon dioxide power generation system without a compression process is characterized by comprising a carbon dioxide power generation system and a carbon dioxide recovery system, wherein the carbon dioxide power generation system comprises a carbon dioxide steel bottle (1), a carbon dioxide turbine (2), a power generator (3) and a carbon dioxide absorption pool (4); wherein the content of the first and second substances,
extracting a normal-temperature high-pressure liquid carbon dioxide working medium from a carbon dioxide steel cylinder (1), wherein the pressure is 7MPa, the temperature is 25 ℃, and the working medium enters a carbon dioxide turbine (2) to expand to do work; the carbon dioxide turbine (2) is coaxially connected with the generator (3), and the carbon dioxide working medium drives the carbon dioxide turbine (2) and the generator (3) to rotate in the expansion process so as to generate electric energy; the outlet pressure of the carbon dioxide turbine (2) is 0.6MPa, the outlet temperature depends on the isentropic efficiency of the turbine, and the carbon dioxide working medium at the outlet is in a gas-liquid mixed state and enters a carbon dioxide absorption pool (4); recycling and reusing the carbon dioxide working medium through a carbon dioxide recycling system;
the carbon dioxide recovery system comprises a carbon dioxide absorption tank (4), a mixed liquid pump (5), a mixed liquid heater (6) and a carbon dioxide gas storage tank (7), an organic amine solution which absorbs carbon dioxide working media in the carbon dioxide absorption tank (4) is pumped into the mixed liquid heater (6) by the mixed liquid pump (5), carbon dioxide gas is desorbed by heating to obtain a regenerated absorbent organic amine solution, the desorbed carbon dioxide enters the carbon dioxide gas storage tank (7) for recovery, and the regenerated absorbent organic amine solution enters the carbon dioxide absorption tank (4) again to absorb the working media discharged by the carbon dioxide power generation system;
the isentropic enthalpy drop of the working medium state of the inlet and the outlet of the carbon dioxide turbine (2) is 33.77kJ/kg, and the isentropic temperature of the corresponding outlet is-53.11 ℃; the number Z of carbon dioxide turbines (2) required in the distributed carbon dioxide power generation system is calculated as follows:
where P is the power demanded by the back end user in kW,
for the mass flow of a single carbon dioxide turbine (2), Δ hisIs the isentropic enthalpy drop of the carbon dioxide turbine (2) and has the unit of kJ/kg, and eta is the isentropic efficiency of the carbon dioxide turbine (2).
2. A compression process free distributed carbon dioxide power generation system as claimed in claim 1, wherein the organic amine solution in the carbon dioxide absorption cell (4) is sodium glycinate solution.
3. A distributed carbon dioxide power generation system without compression process according to claim 1, characterized in that the organic amine solution in the carbon dioxide absorption cell (4) is an enamine solution.
4. A distributed carbon dioxide power generation system without compression process according to claim 1, characterized in that the organic amine solution in the carbon dioxide absorption cell (4) is an ethanolamine solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210766.4A CN112554974B (en) | 2020-11-03 | 2020-11-03 | Non-compression distributed carbon dioxide power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210766.4A CN112554974B (en) | 2020-11-03 | 2020-11-03 | Non-compression distributed carbon dioxide power generation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112554974A CN112554974A (en) | 2021-03-26 |
| CN112554974B true CN112554974B (en) | 2021-11-19 |
Family
ID=75041671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011210766.4A Active CN112554974B (en) | 2020-11-03 | 2020-11-03 | Non-compression distributed carbon dioxide power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112554974B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202065021U (en) * | 2011-03-03 | 2011-12-07 | 张英凡 | Non-oil consumption CO2 heat engine for automobile |
| CN102562191A (en) * | 2010-10-22 | 2012-07-11 | 株式会社东芝 | Carbon dioxide recovery method and carbon-dioxide-recovery-type steam power generation system |
| CN103743580A (en) * | 2013-12-04 | 2014-04-23 | 中石化石油工程设计有限公司 | Enhanced geothermal system development test device |
| CN203658074U (en) * | 2013-12-04 | 2014-06-18 | 中石化石油工程设计有限公司 | Enhancement-mode geothermal system exploitation test apparatus |
| CN107461227A (en) * | 2017-07-26 | 2017-12-12 | 西安交通大学 | A kind of supercritical carbon dioxide centrifugal compressor and radial-inward-flow turbine coaxial configuration |
| CN108150369A (en) * | 2017-12-11 | 2018-06-12 | 西安交通大学 | A kind of more condition carbon dioxide electricity generation systems and method using dry-hot-rock geothermal energy |
| CN108771950A (en) * | 2018-07-12 | 2018-11-09 | 上海发电设备成套设计研究院有限责任公司 | A kind of carbon dioxide recycle electricity generation system and method being pressurized using chemical absorbing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068170B (en) * | 2019-04-30 | 2020-05-22 | 西安交通大学 | Oil field waste heat utilization system based on absorption refrigeration |
-
2020
- 2020-11-03 CN CN202011210766.4A patent/CN112554974B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562191A (en) * | 2010-10-22 | 2012-07-11 | 株式会社东芝 | Carbon dioxide recovery method and carbon-dioxide-recovery-type steam power generation system |
| CN202065021U (en) * | 2011-03-03 | 2011-12-07 | 张英凡 | Non-oil consumption CO2 heat engine for automobile |
| CN103743580A (en) * | 2013-12-04 | 2014-04-23 | 中石化石油工程设计有限公司 | Enhanced geothermal system development test device |
| CN203658074U (en) * | 2013-12-04 | 2014-06-18 | 中石化石油工程设计有限公司 | Enhancement-mode geothermal system exploitation test apparatus |
| CN107461227A (en) * | 2017-07-26 | 2017-12-12 | 西安交通大学 | A kind of supercritical carbon dioxide centrifugal compressor and radial-inward-flow turbine coaxial configuration |
| CN108150369A (en) * | 2017-12-11 | 2018-06-12 | 西安交通大学 | A kind of more condition carbon dioxide electricity generation systems and method using dry-hot-rock geothermal energy |
| CN108771950A (en) * | 2018-07-12 | 2018-11-09 | 上海发电设备成套设计研究院有限责任公司 | A kind of carbon dioxide recycle electricity generation system and method being pressurized using chemical absorbing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112554974A (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108775266B (en) | Transcritical carbon dioxide power cycle and absorption heat pump combined heat and power cogeneration system for high-temperature flue gas waste heat recovery | |
| CN110887278B (en) | Energy self-sufficient carbon dioxide combined cooling heating and power system for low-grade heat source | |
| CN110905747B (en) | Combined power cycle power generation system utilizing high-temperature solar energy and LNG cold energy | |
| CN213928479U (en) | Liquid carbon dioxide energy storage system coupled with kalina circulation | |
| CN108798808B (en) | CO for recovering waste heat of high-temperature flue gas２Cyclic cogeneration system | |
| CN101988397A (en) | Low-grade heat-flow prime mover, generating system and method thereof | |
| CN112554983A (en) | Liquid carbon dioxide energy storage system and method coupled with kalina cycle | |
| WO2023193486A1 (en) | Normal-temperature liquid compressed carbon dioxide mixed working fluid energy storage system and method | |
| CN111608741A (en) | ORC system for recycling waste heat of generator | |
| CN111365130A (en) | Gas turbine waste heat utilization system and method utilizing LNG cold energy | |
| CN113864017A (en) | Kalina/organic Rankine combined cycle power generation system utilizing LNG cold energy and geothermal energy | |
| CN112554974B (en) | Non-compression distributed carbon dioxide power generation system | |
| CN113153475A (en) | Power-heat complementary supercritical CO2Power cycle power generation system | |
| CN210317415U (en) | Absorption type seawater desalination and closed cycle power generation system | |
| WO2023083242A1 (en) | Low-temperature cyclic power generation system and method with carbon dioxide gas as working medium | |
| CN110259537B (en) | Carbon dioxide Rankine cycle power system and operation method thereof | |
| CN111486067A (en) | Based on sCO2Brayton cycle geothermal-solar power generation system | |
| WO2022257856A1 (en) | Rankine cycle system and rankine cycle method | |
| CN114575951B (en) | Organic Rankine two-stage flash evaporation circulating system with gas-liquid injector | |
| CN116412104A (en) | Sliding pressure split-flow type compressed air energy storage system and method | |
| CN115539161A (en) | Carbon dioxide energy storage system | |
| CN114484933A (en) | Carbon dioxide transcritical electricity storage coupling solar heat storage and carbon dioxide storage circulating system device and system method | |
| CN210239766U (en) | Utilize natural working medium to retrieve LNG cold energy power generation's device | |
| CN209875237U (en) | Supercritical double-expansion two-stage regenerative organic Rankine cycle system | |
| CN203822467U (en) | Indirect cooling cycle gas turbine using waste heat of low-pressure compressor for power generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |