Welcome to the Industrial Automation website!

NameDescriptionContent
HONG  KANG
E-mail  
Password  
  
Forgot password?
  Register
当前位置:

Ultra-supercritical power generation, what is the "super power"?

来源: | 作者:佚名 | 发布时间 :2023-12-06 | 254 次浏览: | Share:

Not long ago, Wang Zhigang, Minister of Science and Technology, mentioned ultra-supercritical power generation many times at the "China this decade" series theme press conference, he said that China has developed a million kilowatt-level ultra-supercritical efficient power generation technology for 15 consecutive years, and the current power supply coal consumption can reach a minimum of 264 grams per kilowatt-hour, which is much lower than the national average, and is also at the global advanced level. At present, ultra-supercritical efficient power generation technology and demonstration projects have been promoted throughout the country, accounting for 26% of the total installed capacity of coal power, and will be further promoted in the future.

On November 11, 2020, Datang Dongying Power Generation Co., Ltd. put into operation a million-kilowatt ultra-supercritical coal-fired generating unit.

"Ultra-supercritical power generation" has become a hot word, even in the stock market has become a hot concept. So what kind of scientific "superpower" does this awkward-sounding buzzword mean?

"Ultra-supercritical" focuses on "critical"

We all know that coal is used to generate electricity. But what is ultra-supercritical? This is the first to say what is "critical".

Based on physical knowledge, the general liquid pure substance will vaporize after heating or depressurization to a certain extent; The pure gaseous substance will condense when it is cooled or pressurized to a certain extent.

But any pure substance has a critical point, when the pressure is higher than the critical pressure, no matter how heated, the liquid will not vaporize; When the temperature is higher than the critical temperature, no condensation will occur, no matter how pressurized.

For example, under normal pressure, water heated to 100 ° C will continue to heat into steam; When the pressure of water is higher than 22.13 mpa (about 221 times atmospheric pressure), or the temperature is higher than 374.15 ° C, the evaporation and condensation process will no longer occur.

At critical pressure or critical temperature, the pure substance is in a "critical" state; Below the critical pressure or critical temperature, it is in a "subcritical" state; Above the critical pressure or temperature, it is a "supercritical" state.

Conventional thermal power generation units (including coal-fired power generation, biomass power generation, etc., excluding gas power generation) use coal and other fuels to burn in the boiler, heat water and boost pressure into high temperature and high pressure water vapor, promote the high-speed rotation of the turbine, and then drive the generator to generate electricity.

According to the law of thermodynamics, the efficiency of converting heat energy into electric energy in the thermal power generation process increases with the increase of the steam temperature at the boiler outlet, and the actual process needs to increase the steam pressure and unit capacity simultaneously to comprehensively improve the system efficiency.

After hundreds of years of development, Thermal generating units have generally experienced low temperature and low pressure (below 2.45 mpa, 400℃), medium temperature and medium pressure (3.9 mpa, 450℃), high temperature and high pressure (9.9 mpa, 540℃), ultra-high pressure (13.8 mpa, 540℃), sub-critical (16.7 mpa, 540℃), supercritical (22.4 mpa, 570℃), ultra-supercritical (25 to 31 mpa, 580 ° C to 620 ° C) and other parameter grades, is developing advanced ultra-supercritical (35 mpa, 700 ° C to 760 ° C) grade power generation technology.

Among them, the initial parameters of supercritical, ultra-supercritical, and advanced ultra-supercritical units under development are in supercritical state, and the initial parameters of other units are in subcritical state.

Strictly speaking, pure matter has only three states of "critical", "sub-critical" and "supercritical", and there is no "ultra-supercritical". The ultra-supercritical parameter is essentially a parameter higher than the previous supercritical parameter, which belongs to the scope of the industry agreement. The so-called "ultra-supercritical power generation technology" refers to the efficient power generation technology that uses the feed pump to boost the water to ultra-supercritical pressure, and then heats the water to ultra-supercritical temperature through the fuel combustion in the boiler, and generates electricity through the turbine generator set.

Ultra-supercritical power generation technology is the most advanced thermal power generation technology in the world, which can simultaneously achieve ultra-low emission of pollutants and reduce the coal consumption rate of power supply to less than 265 grams per KWH. Advanced ultra-supercritical power generation technology is being actively developed, and it is possible to further reduce the coal consumption rate of power supply to less than 225 grams per kilowatt-hour.

Ultra-supercritical power generation technology is an important way to achieve high quality development of energy and power under the basic national conditions of rich coal, poor oil and little gas in China.

  • Raymond RE648 - 703 bowl mill feed scroll "NEW" by Alstom Power
  • ALSTOM Power 5415 - NEW combination for GV7 fan, item no: 5415, with gray accessories, new
  • Alstom Power 1BMBR0000090 - Lot of 3 UNC 50 Gram Balance Weights 5/16"
  • GEC Alstom KCC8302 - Thyristor Rectifier Stack Power Module 20X-1310CRL 30Z-2116
  • Alstom Micom P139 - Feeder Management Rack Control Equipment Onebox NFP
  • Alstom Alspa MD2000 - Operation Unit
  • Alstom Single Phase Overcurrent AC Relay KCGG14201T50CEC - by Areva T&D UL Ltd.
  • ALSTOM RP3-77-9786-PT1 - ARM GUIDE FAST SHIPPING!!! (B168)
  • Alstom/Brown Boveri r303772p1 - Cover Gasket, 13335400
  • Alstom R303779P1 - 3/6 Pinion 1-1/2 inch shaft 25 tooth gear
  • Alspa Alstom VF 2002 A - Frequency Converter *H2R39E4*
  • Alstom Bushing 06714-271-00 - NEW!!! FREE SHIPPING!!!
  • ALSTOM MC15-M2 - Gecostat excitation manual control excitation setting
  • CONVERTEAM EPIC III E3-F-FN / EPICIIIE3FFN - Control Module
  • GE FANUC/ALSTOM 316 - FIP CH S2 - IR129 - #NAME?
  • New GE Alstom Cegelec IC693CMM311M - Communications Control Module Alspa 80-35
  • CONVERTEAM ALSTOM MVS3000-4001 - ALSPA MV3000 Drive Data Manager SKU#2
  • ALSTOM MT96-MPSU011,MCMM003,MT93-HXC1XXX015,MCPU020 - MDPCIOC002 Power Supply
  • CONVERTEAM S98101/118 / S98101118 - (New with box)
  • General Electric Alstom Combustion Engineering GP-2375-B - Heavy Hex Jam Nut
  • ALSTOM MVAJM14JB1002A1 - N/O-2N/C 220-250VDC High Speed Tripping and Control Relay
  • ALSTOM MVAJM14JB1002A1 - N/O-2N/C 220-250VDC HIGH SPEED TRIPPING AND CONTROL RELAY
  • ALSTOM MVAAM11BJCJ5516A - PROTECTION RELAY
  • ALSTOM LGPG 111 LGPG11101R551 - EE DIGITAL INTRGRATED GENERATOR PROTECTION RELAY
  • CONVERTEAM 251459-000 / 251459000 - Module
  • NOS Alstom D-996-326-PC25 C161-2991M25 - Threaded Pipe Nipple 4730009866528
  • GE FANUC/ALSTOM 317 - FIP CH S2 - IR129 - #NAME?
  • ALSTOM GE D-984-0579 TP305 A/W REV 02 - FREQUENCY DETECTION BOARD
  • Alstom 01054-000-0N - Throw Rod Bearing NEW!!! !!!
  • ALSTOM Microverter D 3.4/500,029.130 004 - #NAME?
  • Alstom Alspa MD2000 - Operating Unit
  • Alstom Bombardier UMD-125-C - Contactor Coil 4078B71H01
  • ALSTOM MT96-MPSU011,MCMM003,MT93-HXC1XXX015,MCPU020 - MDPCIOC002 Power Supply
  • Alstom Ge D-984-0579 TP305 A/W Rev 02 - Frequency Detection Board
  • Alstom Villeurbanne N895600512D - Card M 1000417012 Board 1040 ECPU1
  • Alstom Ps 421 - PS421 Control Unit
  • GE ALSTOM PIB504 - Fiber Optic Interface Board
  • Alstom Auxiliary Relay VAA23ZG8507F(M) - 110-250V AC/DC
  • Cegelec/Alstom gds1017-4001 - Alstom Improvement Card
  • Alstom 34232-084-01 - Sw Mach Oiler Fitting NEW!!! FREE SHIPPING!!!
  • ALSTOM MVAJM15JA1002A - HIGH SPEED TRIPPING AND CONTROL RELAY
  • Alstom 00441-005-0N - Screw 4PK NEW!!! !!!
  • ALSTOM MT96-MPSU011,MCMM003,MT93-HXC1XXX015,MCPU020 - MDPCIOC002 Power Supply
  • Alstom Limelight FS-100-331 - Flame Spectrometer P/N :FS-100-331 110-220 VAC 50-60 Hz (New with Box)
  • Ge Alstom Combustion Engineering 101-295 - Stud Adjusting Jam Nut NOS
  • CONVERTEAM 20X4498/110C / 20X4498110C - Module
  • ALSTOM MVAJM14JB1002A1 - N/O-2N/C 220-250VDC HIGH SPEED DUMPING AND CONTROL RELAY
  • ALSTOM MVAJ105JA1002A - TRIPPING CONTROL RELAY
  • Alstom 54549-000-02 - Sw Mach Gear Complete NEW!!! FREE SHIPPING!!!
  • Alstom Alspa gd3000e - Reader Course Board 30v9200/110 With gds1003-4001 Keyboard
  • ALSTOM POWER R461 - PAWL LIFTING LEVEL (1 PC) NEW R-461 132214
  • Alstom 029.069 615 - PCB Board
  • Alstom Power Conversion 20x4496 - PCB Card Rev 0004
  • ALSTOM VTT DEFINITE TIME RELAY VTT11ZG8050LCH - 110-125V AC
  • GEC Alstom KCC8302 - Thyristor Rectifier Stack Power Module 20X-1310CRL 30Z-2116 a
  • Alstom GE Combustion Engineering 94-165 - Hinge Pin NOS
  • ALSTOM GECOSTAT FV223-M2 - EXCITER DIODE FAILURE DETECTOR
  • ALSTOM MVAJM14JB1002A1 - N/O-2N/C 220-250VDC HIGH SPEED DUMPING AND CONTROL RELAY
  • Alstom 34232-064-02 - Drive .188 Oiler Fitting NEW!!! FREE SHIPPING!!!
  • Alstom Villeurbanne N895604516F - Card ECPU2_2_2GS SOS.512B Board ECPU2 1000268972
  • CONVERTEAM MVDL800-4701 / MVDL8004701 - Module
  • ALSTOM SCN 804D - Measurement Interface Module
  • ALSTOM RP3-77-9783 - NEW Arm Guide for Alstom Grid SPO Precipitator (B278)
  • Alstom Brown Boveri HTGD333336P0049 - Lot of 4 4.5" Inch Key Segment
  • Alstom Bitronics M870D - Remote Display Unit 3773
  • ALSTOM GE D-984-0579 TP305 A/W REV 02 - FREQUENCY DETECTION BOARD
  • Alstom Bitronics M870D - Remote Display Unit 19490 4053
  • Alstom TFM GW-FE Module P701000011S - M 1000742179
  • ALSTOM TYPE A96LC - Relay
  • Alstom S20-0007-02 - Power Hub Accessories * NEW *
  • ALSTOM RS422 - Module * NEW NO BOX *
  • GE ALSTOM PIB315B - PCB Board
  • ALSTOM PRIMA PRS12N04BH - Relay
  • ALSTOM MVAJ105JA1002A - TRIPPING CONTROL RELAY
  • ALSTOM MVAJ105JA1002A - TRIPPING CONTROL RELAY
  • NASG Holdings 7115 - Green-Amber Light Panel Assembly for Alstom Cabs
  • Alstom P241911B2M0600J - Modular Protection Platform
  • ALSTOM MOTPRO MCHNM - Protection Relay MCHNM01H1AB0500A
  • ALSTOM RS100 - 100A 690VAC NSNP
  • ALSTOM MVAJM14JB1002A1 - N/O-2N/C 220-250VDC HIGH SPEED DUMPING AND CONTROL RELAY
  • ALSTOM MVAJM14JB1004A1 - N/O-4N/C 220-250VDC HIGH SPEED DUMPING AND CONTROL RELAY
  • ALSTOM CDG - OVER CURRENT RELAY (INVERSE) CDG31FF012SACH
  • ALSTOM PD 521 - Power Drive
  • CONVERTEAM PSF3B / PSF3B - (BRAND NEW)
  • Auburn Engineering 1G-4765-C - NEW! Spark Ignitor Plug Assembly Alstom Free Shipping!
  • Alstom 55153-000-01 - Switch Machine Roller Arm NEW!!! FREE SHIPPING!!!
  • GE Alstom Cegelec Alspa 80-35 IC693PWR324X - New Power Supply Module 30W STD
  • ALSTOM MVAAM - Auxiliary Relay MVAAM11B1BA2530A
  • Alstom Bitronics M870D - Remote Display Unit
  • C-E ALSTOM 723 - NEW Mill Grinder Crank Warranty
  • ABB UNITOL 1000 series automatic voltage regulator
  • ABB GFD233 3BHE022294R0102 Redundant System Control Module
  • Honeywell 001649-M5T028 - Tata Printed Circuit Board Rev: 0
  • Honeywell C7012A1145 - 1PC New UV Flame Detector Expedited Shipping
  • Honeywell OV210 - Baxter Bakery Oven Igition Control. For DRO. 00-616973 NEW
  • Honeywell 51304431-125 - 1PC New /51304431125 1 year warranty#XR
  • Honeywell QPP-0002 - Quad Processor Module / 5 Vdc / Massima 1.2A/24Vdc/max.25mA
  • Honeywell QPP-0002 - Quad Processor Module / 5Vdc / Max. 1.2A/24Vdc/max.25mA
  • Honeywell 8C-PCNT02 - 514543363-275 module
  • Honeywell DPCB21010002 - Tata Printed Circuit Board
  • Honeywell DPCB21010002 - Tata Printed Circuit Board Rev: 0
  • Honeywell 30735863-502 - SWITCH
  • Honeywell TK-CCR014 - REDUNDANT NET INTERFACE NEW ORIGINAL FREE EXPEDITED SHIPPING/
  • Honeywell 51403165-400 - new 51403165400/
  • Honeywell 318-049-001 - "100 Batteries(Japan Liion2Ah14.8Wh)INTERMEC/ PR2,PR3 P/N.:."
  • Honeywell FC-PSU-UNI2450U - Power Supply
  • Honeywell 965-0676-010 - WARNING COMPUTER SV
  • Honeywell 51403519-160 - module
  • Honeywell 107843 - HOUSING CARBON FILE P/N NE COND # 11438 (4)
  • Honeywell VR434VA5009-1000 - Brand new in box Condensing boiler valve DHL fast shipping
  • Honeywell SPXCDALMFX - plc new FREE EXPEDITED SHIPPING/
  • Honeywell BCM-PWS - BCM-ETH BCM-MS/TP BCM-MS/TP Network controller setFedEx or DHL
  • Honeywell YSTR12D-22/C/-2J0DFA/BE/400/T/-CM.HO.TG.SB.SM,ZS,F1,LP,/FX/,1C-BT - UNMP
  • Honeywell IWS-1603-HW - 90-250VAC 1.0A UNMP
  • Honeywell 51304386-150 - MEASUREX Factory Packed
  • Honeywell CC-IP0101 - Profibus Gateway Module
  • Honeywell CC-PFB401 - / CCPFB401 (NEW IN BOX)
  • Honeywell 50071726 - St 800 Series Pressure Transmitter Remote Diaphragm 11-42VDC
  • Honeywell 621-2150 - / 6212150 (NEW NO BOX)
  • Honeywell 80360206-001 - USED YAMATAKE CLI BOARD
  • Honeywell BMDX001A-001 - ACCURAY / BOARD BMDX001A001
  • Honeywell XCL8010A - New CPU Controller.
  • Honeywell PGM-7320 - 1PCS NEW Rae Systems MiniRAE 3000 Portable VOC Monitor#XR
  • Honeywell BK-G40 - U65 *FULL INSTALLATION* Gas Meter 3?± Inlet/Outlet Spool NEW UNUSED
  • Honeywell DM106-0-B-00-0-R-1-00000-000-E0 - DPR100 250V NSNP
  • Honeywell KFD840 - PRIMARY FLIGHT DISPLAY CORE PN: 066-01206-0104
  • Honeywell 51401914-100 - 51400996-100
  • Honeywell TK-PRS021 - Module Via FEDEX/DHL