CN205189972U - Ten grades of heat recovery system of adjustable assistant warden in 1000MW unit area - Google Patents
Ten grades of heat recovery system of adjustable assistant warden in 1000MW unit area Download PDFInfo
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- CN205189972U CN205189972U CN201520947585.8U CN201520947585U CN205189972U CN 205189972 U CN205189972 U CN 205189972U CN 201520947585 U CN201520947585 U CN 201520947585U CN 205189972 U CN205189972 U CN 205189972U
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Abstract
Ten grades of heat recovery system of adjustable assistant warden in 1000MW unit area, it mainly includes: the high pressure cylinder of steam turbine, the boiler, the oxygen -eliminating device draws gas from one section high pressure cylinder and connects 1 number high adding, draws gas from the high pressure cylinder two -stage process and connects 2 numbers high adding, draws gas from the high pressure cylinder three -section and connects 3 numbers high adding, its characterized in that the high pressure cylinder three -section draw gas and connect earlier the leading cold ware that evaporates, connecting 3 numbers high adding the leading upper reaches of evaporating cold ware adopt the series system to arrange 0 number high adding, at least all the way the condensate water behind the oxygen -eliminating device, in proper order through highly add for 3 numbers, highly add for 2 numbers, 1 number high adding and 0 number high adding, through the higher relatively leading boiler economizer that flows into after evaporating cold ware of extraction temperature, 1 section steam extraction port upper reaches of drawing gas of high pressure cylinder add 0 section steam extraction port who draws gas, and 0 install between the steam extraction port that draws gas of section and 0 number high adding and adjust the high governing valve that adds confession air pressure 0 number, it has the structure and forms rationally, reduces the energy consumption, characteristics such as raise the efficiency.
Description
Technical field
The utility model relates to ten grades of heat regenerative systems of the adjustable assistant warden of a kind of 1000MW unit band, belong to thermal power plant equipment technical field.
Background technique
In recent years, the many employings of the Large-scale fire-electricity unit nine grades of backheats gone into operation in Europe, and in domestic newly-built 1000MW unit, thermodynamic system of steam tur also all adopts nine grades of backheats, and feed temperature has all been increased to about 300 DEG C.In theory, the progression of feedwater backheat is more, and the Thermal Cycling of steam turbine is more close to Carnot's cycle, and the efficiency of cycle of unit is higher, and general backheat progression increases by one to two-stage, can make unit hear rate decline about 0.2-0.3%.Therefore improving Fuel Economy under Partial Load to continue, considering to set up in thermodynamic system " #0 high-pressure heater ", have the prerequisite of enough deficient enthalpys before guarantee feedwater enters economizer under, improve feed temperature, reach the object reducing unit hear rate.Usual employing is non-adjustable draws gas as the high heating of #0, but because extraction opening pressure is limited by unit operation operating mode completely, unadjustable, therefore when sub load, #0 is high, and to add extraction pressure lower, then improve the limited use of feed temperature, fail fully to embody the advantage of ten grades of backheats when sub load.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art existence, and provide a kind of that carry out improving on prior art basis, structure composition rationally, easy to use and reliable, the effectiveness of regenerator of steam turbine can be improved, reduce by ten grades of heat regenerative systems of the adjustable assistant warden of 1000MW unit band of steam turbine energy consumption.
The purpose of this utility model has been come by following technical solution: ten grades of heat regenerative systems of 1 one kinds of adjustable assistant wardens of 1000MW unit band, it mainly comprises: the high-pressure cylinder of steam turbine, boiler, oxygen-eliminating device, drawing gas from high-pressure cylinder one section, No. 1, connection is high to be added, drawing gas from high-pressure cylinder two sections, No. 2, connection is high to be added, drawing gas from high-pressure cylinder three sections, No. 3, connection is high to be added, described high-pressure cylinder three sections draws gas and first connects preposition steaming cooler, connect No. 3 highlyer to add, adopt arranged in series to have No. 0 highly to add in the upstream of described preposition steaming cooler, at least one road water of condensation is after oxygen-eliminating device, highly to add through No. 3 successively, No. 2 high adds, No. 1 high add and No. 0 highly to add, boiler economizer is being flowed into after the preposition steaming cooler that extraction temperature is relatively high.
1 section of extraction opening upstream of drawing gas of described high-pressure cylinder has additional 0 section of extraction opening drawn gas, and described 0 section of extraction opening drawn gas and No. 0 high add between the high modulating valve adding pressure of steam supply of No. 0, adjustment is installed.
The utility model is in the heat regenerative system of nine grades of the preposition steaming cooler of original band, adopt serial fashion to set up No. 0 highly to add, highly the upstream being arranged in preposition steaming cooler is added by newly-increased No. 0, namely feedwater is introduced into that relatively low No. 0 of extraction temperature is high to be added, enter the preposition steaming cooler that extraction temperature is relatively high again, after being heated by steam cooler, flow into boiler economizer; Increase No. 0 extraction opening in high-pressure cylinder No. 1 extraction opening upstream, and adopt modulating valve to regulate extraction pressure to be No. 0 highly to add steam supply.
The utility model is for certain power station first phase (2 × 1000MW) engineering single reheat unit, setting up #0 high adding in the upstream of the preposition steaming cooler of former nine grades of backheats becomes ten grades of heat regenerative systems, according to heat Balance Calculation result, compare original heat regenerative system, feed temperature can be increased to 313.6 DEG C from 298.2 DEG C; Thermodynamic system coal consumption decline about 12 ~ 38kJ/kWh, effectively reduces turbine heat rate and the coal consumption of unit mark, and coal consumption is benefited significantly, comprehensive income of discounting for 20 years about 5,080 ten thousand yuan.
The utility model has structure composition rationally, easy to use and reliable, reduces energy consumption, the feature such as to raise the efficiency.
Accompanying drawing explanation
Fig. 1 is the connection diagram of ten grades of heat regenerative systems of the adjustable assistant warden of 1000MW unit band described in the utility model.
Embodiment
Below in conjunction with accompanying drawing 1 and example, the utility model is described in detail: shown in Fig. 1, ten grades of heat regenerative systems of the adjustable assistant warden of a kind of 1000MW unit band, it mainly comprises: the high-pressure cylinder 1 of steam turbine, boiler economizer 2, oxygen-eliminating device 3, drawing gas from high-pressure cylinder 1 one sections, No. 1,4 connection is high adds 5, drawing gas from high-pressure cylinder 1 two sections, No. 2,6 connection is high adds 7, drawing gas from high-pressure cylinder 1 three sections, No. 3,8 connection is high adds 9, described high-pressure cylinder 1 three sections draws gas and 8 first connects preposition steaming cooler 10, connect No. 3 again and highly add 9, adopt arranged in series to have No. 0 highly to add 11 in the upstream of described preposition steaming cooler 10, at least one road water of condensation 12 is after oxygen-eliminating device 3, highly 9 are added successively through No. 3, No. 2 high adds 7, No. 1 high adds 5 and No. 0 and highly adds 11, boiler economizer 2 is being flowed into after the preposition steaming cooler 10 that extraction temperature is relatively high.
Shown in figure, 1 section of described high-pressure cylinder draw gas 4 extraction opening upstream have additional 0 section draw gas 13 extraction opening, and described 0 section draw gas 13 extraction opening and No. 0 high adding between 11 the high modulating valve 14 adding 11 pressure of steam supplies of No. 0, adjustment is installed.
Embodiment: shown in Fig. 1, the utility model carries out Improvement and perfection on the basis of nine grades of heat regenerative systems of the preposition steaming cooler of original band, position three is taken out in the first order place of drawing gas that steaming cooler is installed in after the maximum reheating of the degree of superheat namely, after heating steam takes out position extraction from three after Steam Turbine Through IP Admission governing stage, cool through preposition steam cooler, flow into No. 3 and highly to add; Again by serial fashion, setting up No. 0 high adding in the upstream of preposition steaming cooler 10 becomes ten grades of heat regenerative systems; Main feedwater flows into the maximum preposition steaming cooler of the degree of superheat after last No. 0 high heating, by flowing into boiler economizer 2 after the heating of steaming cooler.
The utility model only need carry out less adjusted design on the type of former nine grades of backheats, namely No. 0 extraction opening is increased in high-pressure cylinder No. 1 extraction opening upstream, and modulating valve is equipped with on bleed steam pipework, ten grades of heat regenerative systems of the non-adjustable assistant warden of contrast attenation factor, namely first improve the newly-increased No. 0 high extraction opening pressure added, No. 0 suitable high initial steam pressure added is adjusted to again by modulating valve, special under partial load condition, No. 0 high extraction opening pressure that adds have also been obtained certain lifting, effectively improve the effectiveness of regenerator of steam turbine, reduce the hear rate of steam turbine.
The utility model is applied to large-size thermal power plant and has following advantage:
1) set up No. 0 highly to add, can final feed temperature be improved, thus improve the performance driving economy of steam turbine when low-load;
2) adopt ten grades of heat regenerative systems of the adjustable assistant warden of band, when sub load, compare ten grades of heat regenerative systems of the non-adjustable assistant warden of band, No. 0 high vapor pressure added is improved, and feed temperature can further improve, thus obtains better economic benefit;
3) to improve in nine grades of heat regenerative systems No. 2 and highly add the excessive situation of temperature rise: owing to steaming the raising of cooler feed-water inlet temperature, No. 3 high throttle (steam) temperatures added also improve thereupon, bring up to ten grades of backheats from 318.2 DEG C of nine grades of backheats 330.5 DEG C, and then improve No. 3 high outlet feed temperatures added about 6.2 DEG C, thus eventually reduce No. 2 high temperature rises added, be reduced to 45.9 DEG C of ten grades of backheats from 52.9 DEG C of nine grades of backheats, effectively prevent thermal shock to No. 2 high damages added.
Claims (2)
- Ten grades of heat regenerative systems of 1.1000MW unit band is adjustable assistant warden, it mainly comprises: the high-pressure cylinder of steam turbine, boiler, oxygen-eliminating device, drawing gas from high-pressure cylinder one section, No. 1, connection is high to be added, drawing gas from high-pressure cylinder two sections, No. 2, connection is high to be added, drawing gas from high-pressure cylinder three sections, No. 3, connection is high to be added, it is characterized in that described high-pressure cylinder three sections draws gas and first connect preposition steaming cooler, connect No. 3 highlyer to add, adopt arranged in series to have No. 0 highly to add in the upstream of described preposition steaming cooler, at least one road water of condensation is after oxygen-eliminating device, highly to add through No. 3 successively, No. 2 high adds, No. 1 high add and No. 0 highly to add, boiler economizer is being flowed into after the preposition steaming cooler that extraction temperature is relatively high.
- 2. ten grades of heat regenerative systems of the adjustable assistant warden of 1000MW unit band according to claim 1, it is characterized in that 1 section of described high-pressure cylinder extraction opening upstream of drawing gas has additional 0 section of extraction opening drawn gas, and described 0 section of extraction opening drawn gas and No. 0 high add between the high modulating valve adding pressure of steam supply of No. 0, adjustment is installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520947585.8U CN205189972U (en) | 2015-11-25 | 2015-11-25 | Ten grades of heat recovery system of adjustable assistant warden in 1000MW unit area |
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| CN201520947585.8U CN205189972U (en) | 2015-11-25 | 2015-11-25 | Ten grades of heat recovery system of adjustable assistant warden in 1000MW unit area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318831A (en) * | 2019-07-04 | 2019-10-11 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of regenerative steam system of single reheat power generator turbine |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318831A (en) * | 2019-07-04 | 2019-10-11 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of regenerative steam system of single reheat power generator turbine |
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