CN109826709A - A kind of heat power generating system and method suitable for low temperature environment - Google Patents
A kind of heat power generating system and method suitable for low temperature environment Download PDFInfo
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- CN109826709A CN109826709A CN201910166780.XA CN201910166780A CN109826709A CN 109826709 A CN109826709 A CN 109826709A CN 201910166780 A CN201910166780 A CN 201910166780A CN 109826709 A CN109826709 A CN 109826709A
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- carbon dioxide
- low temperature
- heat
- import
- turbine
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- 238000000034 method Methods 0.000 title claims abstract description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 107
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 54
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 54
- 230000008676 import Effects 0.000 claims abstract description 29
- 239000000446 fuel Substances 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000008246 gaseous mixture Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000007710 freezing Methods 0.000 claims description 2
- 230000008014 freezing Effects 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 2
- 239000002440 industrial waste Substances 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- 229960004424 carbon dioxide Drugs 0.000 description 37
- 230000007613 environmental effect Effects 0.000 description 4
- 210000004209 hair Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention provides a kind of heat power generating systems and method suitable for low temperature environment, carbon dioxide pump discharge connects carbon dioxide collecting device and cryogenic regenerator high pressure side-entrance, cryogenic regenerator high pressure side outlet, low temperature exhaust heat recover high-pressure side, high temperature regenerator high-pressure side, combustion chamber import is sequentially connected, oxygen feedway, fuel supply system is all connected with combustion chamber, combustor exit connects turbine import, turbine connects generator, turbine exhaust mouth, high temperature regenerator low-pressure side, cryogenic regenerator low temperature side, cooler inlet is sequentially connected, cooler outlet connects separator import, the carbon dioxide outlet connect compressor group import of separator, compressor set outlet connection condenser inlet, condensator outlet connects carbon dioxide pump inlet.Present system energy utilization efficiency is high, and system generating efficiency is high, and system does not discharge pollutants, 100% trapping carbon dioxide and recycling condensed water, and system parameter is not high, and key equipment Innovation Input is small.
Description
Technical field
The present invention relates to a kind of heat power generating systems and method suitable for low temperature environment, belong to thermal power generation technology neck
Domain.
Background technique
According to thermodynamic principles, the hot-side temperature of thermodynamic cycle is higher, cold junction temperature is lower, then its thermal efficiency is higher.Heat
End temperature is often limited to the performance of high-temperature material, such as: turbine is usually into vapour maximum temperature in supercritical turbine group
600 DEG C of grades, turbine intake air temperature is usually 1100~1400 DEG C of grades in gas turbine.Cold junction temperature is limited to environment item
Part, including atmospheric temperature and water source temperature.The effective use of cold end and working medium physical property have close association.Although high latitude, Gao Hai
It rises sheer from level ground area and other areas for having cold source condition, and has the season of cold source condition, often have in these environment sub-zero
Sufficient cold source condition, still, for Steam Turbine, water will freeze and low pressure (LP) cylinder exit design pressure in subzero
The limitation of power is unable to fully utilize such cold end condition；For gas turbine, low intake air temperature is advantageous to raising efficiency,
But the critical-temperature of air is too low, acts on limited.Compared to the thermodynamic cycle of above-mentioned working medium, using carbon dioxide as the dynamic of working medium
Power circulation is more suitable for cold environmental conditions, this is because the critical point of carbon dioxide is 31 DEG C/7.4MPa, it is easy in low temperature
Under the conditions of it is appropriate pressurized liquefied.
The half-closed supercritical carbon dioxide circulation hot-side temperature of direct-burning heating can reach the temperature of similar gas turbine, and
And supercritical carbon dioxide circulation reduces wasted work using backheat, Near The Critical Point compression, makes it have high cycle efficieny.Half
Pure oxygen burning can be used in enclosed supercritical carbon dioxide circulation, to avoid NOx pollutant is generated, and traps burning with can be convenient
The carbon dioxide of generation.
The high temperature advantage for how making full use of cold environmental conditions and direct-burning heating, constructs efficient heat power generating system
It is that those skilled in the art are dedicated to the problem solved.Such electricity generation system there are no relevant report in industry.
Summary of the invention
The technical problem to be solved by the present invention is how to make full use of the high temperature of cold environmental conditions and direct-burning heating excellent
Gesture constructs efficient heat power generating system.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a kind of heating power hairs suitable for low temperature environment
Electric system, it is characterised in that: including carbon dioxide pump, carbon dioxide pump discharge divides two-way, connects carbon dioxide collection dress all the way
It sets, another way connects the side-entrance of cryogenic regenerator high pressure, and cryogenic regenerator high pressure side outlet connects the import of low temperature exhaust heat recover,
Low temperature exhaust heat recover outlet connection the high pressure side-entrance of high temperature regenerator, high temperature regenerator high pressure side outlet connect combustion chamber into
Mouthful, oxygen feedway connects combustion chamber oxygen inlet, and fuel supply system connects chamber fuel import, and combustor exit connects
Turbine import is connect, turbine connects generator, and turbine exhaust mouth connects the low pressure side-entrance of high temperature regenerator, high temperature regenerator low-pressure side
Outlet connection cryogenic regenerator low temperature side-entrance, cryogenic regenerator low side outlets connect cooler inlet, and cooler outlet connects
Water receiving separator import, the water out of separator connect water collecting device import, the carbon dioxide outlet connection of separator
Compressor set import, compressor set outlet connection condenser inlet, condensator outlet connect carbon dioxide pump inlet.
Preferably, the compressor set is with intercooled compressor set.
Preferably, the low temperature exhaust heat recover is that 30~40 DEG C of external low grade residual heats heat carbon dioxide using temperature
Working medium.
It is highly preferred that the low grade residual heat of the outside include coal-burning power plant's turbine discharge heat of condensation, solar heat,
Heat, industrial waste heat.
Preferably, the fuel supply system provides the fuel of gas or liquid.
Preferably, the fuel that the fuel supply system provides includes natural gas, synthesis gas, hydrogen, organic compound fuel.
The present invention also provides one kind be suitable for low temperature environment, especially subzero environment, thermal power generating method, adopt
With the above-mentioned heat power generating system suitable for low temperature environment, which is characterized in that step are as follows: carbon dioxide pump is by liquid titanium dioxide
The pressurization of carbon working medium, pressurized carbon dioxide working medium are heated through cryogenic regenerator, then are heated through low temperature exhaust heat recover again, then pass through
The heating of high temperature regenerator is heated subsequently into combustion chamber by fuel and oxygen combustion, oxygen and fuel needed for combustion chambers burn
It is provided respectively by oxygen feedway, fuel supply system；The gaseous mixture of combustion chamber discharge enters turbine expansion acting, pushes hair
Motor generates electric power；Turbine exhaust successively discharges waste heat through high temperature regenerator and cryogenic regenerator, then cooling through cooler, then
It is dehumidified by separator, the gas after dehumidifying is pressurized through compressor set again, is then cooled to liquid through condenser, enters back into two
Carbonoxide pump；Carbon dioxide pump discharge divides two-way, another all the way by extra carbon dioxide storage in carbon dioxide collecting device
Road carbon dioxide reenters circulation.
Preferably, the carbon dioxide pump discharge pressure is 5~8MPa.
Preferably, the turbine import Temperature of Working is 900 DEG C or more, and turbine exhaust temperature is 800 DEG C hereinafter, turbine is arranged
Atmospheric pressure is 1~3MPa.
Preferably, the temperature of the condenser is 0~5 DEG C, higher than the freezing point of water.
Preferably, the carbon dioxide working medium of lower temperature of the high-temperature component in the combustion chamber and turbine by extracting is cold
But.
Preferably, the carbon dioxide that the carbon dioxide collecting device is collected can be used for industrial use, enhanced petroleum is opened
It adopts or is sealed up for safekeeping.
Heat power generating system provided by the invention suitable for low temperature environment, high latitude, height for cold environmental conditions
Altitude Regions or low temperature season, have the following beneficial effects:
1, system capacity utilization efficiency is high, and 30~40 DEG C of extremely low-grade heat can be recycled.
2, system generating efficiency is high, and under the conditions of same turbine-inlet temperature, generating efficiency can be equivalent to or be higher than combustion gas
Turbine combined cycle unit.
3, system does not discharge pollutants, 100% trapping carbon dioxide, 100% recycling condensed water.
4, system parameter is not high, and in combination with gas turbine design, Innovation Input is small for combustion chamber and turbine.
Detailed description of the invention
Fig. 1 is the heat power generating system schematic diagram provided in this embodiment suitable for low temperature environment；
Description of symbols:
1- carbon dioxide pump, 2- cryogenic regenerator, 3- low temperature exhaust heat recover, 4- high temperature regenerator, the combustion chamber 5-, 6- oxygen
Air feed system, 7- fuel supply system, 8- turbine, 9- generator, 10- cooler, 11- separator, 12- water collect dress
It sets, 13- compressor set, 14- condenser, 15- carbon dioxide collecting device.
Specific embodiment
Present invention will be further explained below with reference to specific examples.
Fig. 1 is the heat power generating system schematic diagram provided in this embodiment suitable for low temperature environment, and described being suitable for is low
The heat power generating system of warm environment includes carbon dioxide pump 1, and the outlet of carbon dioxide pump 1 divides two-way, connects carbon dioxide all the way and receives
Acquisition means 15, another way connect 2 high pressure side-entrance of cryogenic regenerator, and 2 high pressure side outlet of cryogenic regenerator connects low temperature exhaust heat and returns
Receive 3 import of device, the outlet of low temperature exhaust heat recover 3 connection 4 high pressure side-entrance of high temperature regenerator, 4 high pressure side outlet of high temperature regenerator
5 import of combustion chamber is connected, oxygen feedway 6 connects 5 oxygen inlet of combustion chamber, and fuel supply system 7 connects 5 fuel of combustion chamber
Import, the outlet of combustion chamber 5 connection 8 import of turbine, turbine 8 connect generator 9, and 8 exhaust outlet of turbine connects 4 low pressure of high temperature regenerator
Side-entrance, 4 low side outlets of high temperature regenerator connect 2 low temperature side-entrance of cryogenic regenerator, and 2 low side outlets of cryogenic regenerator connect
10 import of cooler is connect, the water out connection water of the outlet of cooler 10 connection 11 import of separator, separator 11 collects dress
Set 12,13 import of carbon dioxide outlet connect compressor group of separator 11, the outlet of compressor set 13 connection condenser 14 into
Mouthful, the outlet of condenser 14 connection 1 import of carbon dioxide pump.
The above-mentioned heat power generating system suitable for low temperature environment is in low temperature environment (such as: -5 DEG C) in use, specific implementation
Steps are as follows:
Liquid CO 2 working medium is pressurized to 6.5MPa by carbon dioxide pump 1, and pressurized carbon dioxide working medium is through low temperature
Regenerator 2 heats, then is heated to 30 DEG C through low temperature exhaust heat recover 3 again, then heat through high temperature regenerator 4, subsequently into burning
Room 5 is heated to 1000 DEG C by fuel gas buring, combustion chamber 5 burn required oxygen provided by oxygen feedway 6, fuel (such as: day
Right gas) it is provided by fuel supply system 7.The gaseous mixture that combustion chamber 5 is discharged enters turbine 8 and is expanded to 1.8MPa, and turbine 8 pushes hair
Motor 9 generates electric power, and the exhaust of turbine 8 successively discharges waste heat through high temperature regenerator 4 and cryogenic regenerator 2, then cold through cooler 10
But it to 1 DEG C, is then dehumidified by separator 11, the water after dehumidifying enters water collecting device 12, and the gas after dehumidifying is again through pressing
Contracting unit 13 divides three sections to be pressurized to 3.7MPa and cooling during rolling, is cooled to liquid through condenser 14, enters back into carbon dioxide pump 1.
The outlet of carbon dioxide pump 1 divides two-way, all the way by extra carbon dioxide storage in carbon dioxide collecting device 15, another way dioxy
Change carbon and reenters circulation.
If not considering the heat source consumption (such as: from steam turbine of thermal power plant condensing latent heat) of low temperature exhaust heat recover 3, deduct
After station service and various losses, the net generating efficiency of above-mentioned heat power generating system is up to 65% or more, and zero-emission, comprehensive
Combined-cycle Gas Turbine Unit can be significantly better than.
The above, only presently preferred embodiments of the present invention, not to the present invention in any form with substantial limitation,
It should be pointed out that under the premise of not departing from the method for the present invention, can also be made for those skilled in the art
Several improvement and supplement, these are improved and supplement also should be regarded as protection scope of the present invention.All those skilled in the art,
Without departing from the spirit and scope of the present invention, when made using disclosed above technology contents it is a little more
Dynamic, modification and the equivalent variations developed, are equivalent embodiment of the invention；Meanwhile all substantial technologicals pair according to the present invention
The variation, modification and evolution of any equivalent variations made by above-described embodiment, still fall within the range of technical solution of the present invention
It is interior.
Claims (10)
1. a kind of heat power generating system suitable for low temperature environment, it is characterised in that: including carbon dioxide pump (1), carbon dioxide
Pump (1) outlet divides two-way, all the way connect carbon dioxide collecting device (15), another way connect cryogenic regenerator (2) high-pressure side into
Mouthful, cryogenic regenerator (2) high pressure side outlet connects low temperature exhaust heat recover (3) import, low temperature exhaust heat recover (3) outlet connection
High temperature regenerator (4) high pressure side-entrance, high temperature regenerator (4) high pressure side outlet connect combustion chamber (5) import, oxygen feedway
(6) combustion chamber (5) oxygen inlet is connected, fuel supply system (7) connects combustion chamber (5) fuel inlet, and combustion chamber (5) outlet connects
Turbine (8) import is connect, turbine (8) connects generator (9), and turbine (8) exhaust outlet connects high temperature regenerator (4) low pressure side-entrance,
High temperature regenerator (4) low side outlets connect cryogenic regenerator (2) low temperature side-entrance, and cryogenic regenerator (2) low side outlets connect
Connect cooler (10) import, cooler (10) outlet connection separator (11) import, the water out connection of separator (11)
Water collecting device (12) import, carbon dioxide outlet connect compressor group (13) import of separator (11), compressor set
(13) outlet connection condenser (14) import, condenser (14) outlet connection carbon dioxide pump (1) import.
2. a kind of heat power generating system suitable for low temperature environment as described in claim 1, it is characterised in that: the compressor
Group (13) is with intercooled compressor set.
3. a kind of heat power generating system suitable for low temperature environment as described in claim 1, it is characterised in that: more than the low temperature
Heat regenerator (3) is that 30~40 DEG C of external low grade residual heats heat carbon dioxide working medium using temperature.
4. a kind of heat power generating system suitable for low temperature environment as claimed in claim 3, it is characterised in that: the outside
Low grade residual heat includes coal-burning power plant's turbine discharge heat of condensation, solar heat, underground heat, industrial waste heat.
5. a kind of heat power generating system suitable for low temperature environment as described in claim 1, it is characterised in that: the fuel supplies
The fuel of gas or liquid is provided to device (7).
6. a kind of heat power generating system suitable for low temperature environment as claimed in claim 5, it is characterised in that: the fuel supplies
The fuel provided to device (7) includes natural gas, synthesis gas, hydrogen, organic compound fuel.
7. a kind of thermal power generating method suitable for low temperature environment, using as described in any one of claims 1 to 6 suitable for low
The heat power generating system of warm environment, which is characterized in that step are as follows: liquid CO 2 working medium is pressurized by carbon dioxide pump (1), is increased
Carbon dioxide working medium after pressure is heated through cryogenic regenerator (2), then is heated through low temperature exhaust heat recover (3) again, then is returned through high temperature
Hot device (4) heating, is heated subsequently into combustion chamber (5) by fuel gas buring, oxygen needed for combustion chamber (5) burning and fuel difference
It is provided by oxygen feedway (6), fuel supply system (7)；The gaseous mixture of combustion chamber (5) discharge, which enters turbine (8) expansion, to be done
Function, pushing generator (9) generate electric power；More than turbine (8) exhaust is successively discharged through high temperature regenerator (4) and cryogenic regenerator (2)
Heat, then it is cooling through cooler (10), it is then dehumidified by separator (11), the gas after dehumidifying increases through compressor set (13) again
Pressure, is then cooled to liquid through condenser (14), enters back into carbon dioxide pump (1)；Carbon dioxide pump (1), which exports, divides two-way, and one
By extra carbon dioxide storage in carbon dioxide collecting device (15), another way carbon dioxide reenters circulation on road.
8. a kind of thermal power generating method suitable for low temperature environment as claimed in claim 7, it is characterised in that: the titanium dioxide
It is 5~8MPa that carbon, which pumps (1) outlet pressure,.
9. a kind of thermal power generating method suitable for low temperature environment as claimed in claim 7, it is characterised in that: the turbine
(8) import Temperature of Working is 900 DEG C or more, turbine (8) delivery temperature be 800 DEG C hereinafter, turbine (8) pressure at expulsion be 1~
3MPa。
10. a kind of thermal power generating method suitable for low temperature environment as claimed in claim 7, it is characterised in that: the condensation
The temperature of device (14) is 0~5 DEG C, higher than the freezing point of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910166780.XA CN109826709A (en) | 2019-03-06 | 2019-03-06 | A kind of heat power generating system and method suitable for low temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910166780.XA CN109826709A (en) | 2019-03-06 | 2019-03-06 | A kind of heat power generating system and method suitable for low temperature environment |
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| Publication Number | Publication Date |
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Family
ID=66865325
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| CN201910166780.XA Pending CN109826709A (en) | 2019-03-06 | 2019-03-06 | A kind of heat power generating system and method suitable for low temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307129A (en) * | 2019-07-05 | 2019-10-08 | 南京工程学院 | The geother-mal power generation amount appraisal procedure of geothermal energy assistant coal complementary power generation system |
| CN110735678A (en) * | 2019-12-05 | 2020-01-31 | 上海发电设备成套设计研究院有限责任公司 | power cycle system for independent air propulsion device |
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2019
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| CA2265312A1 (en) * | 1998-06-08 | 1999-12-08 | Enver Rustamovich Akhmedov | Method for converting the energy of compressed gas into useful work and gas turbine (combined cycle) power plant for implementing the method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110307129A (en) * | 2019-07-05 | 2019-10-08 | 南京工程学院 | The geother-mal power generation amount appraisal procedure of geothermal energy assistant coal complementary power generation system |
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| CN110735678A (en) * | 2019-12-05 | 2020-01-31 | 上海发电设备成套设计研究院有限责任公司 | power cycle system for independent air propulsion device |
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Application publication date: 20190531 |