CN102650424A - Direct-current furnace starting system matched with middle-pressure flash tank and used for comprehensively recycling working medium and heat - Google Patents
Direct-current furnace starting system matched with middle-pressure flash tank and used for comprehensively recycling working medium and heat Download PDFInfo
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Abstract
The invention provides a direct-current furnace starting system matched with a middle-pressure flash tank and used for comprehensively recycling a working medium and heat, relating to a direct-current furnace starting system which is used by a supercritical direct-current furnace of a power station and can comprehensively recycle the working medium and the heat without starting a boiler water circulating pump. According to the direct-current furnace starting system provided by the invention, a middle-pressure expansion separator is used as a core. A deoxidizing system, a water supply system, a by-pass system, a condenser system, a starting system and a reheater system are called together in a starting process of the supercritical direct-current furnace of the power station, so that the starting process of the direct-current furnace is safely and economically completed under coordinative control of a DCS (Distributed Control System) of a unit, wherein the deoxidizing system, the water supply system, the by-pass system and the condenser system are arranged at a turbine side, and the starting system and the reheater device are arranged at a boiler side. The working medium and the heat can be comprehensively recycled in various working conditions in the starting process, so that not only can the working medium and the heat be comprehensively recycled by starting the direct-current furnace starting system of the boiler water circulating pump, but also the capital investment and the operation and maintenance cost can be greatly saved.
Description
(1) technical field:
The direct current stove start-up system that the companding container can reclaim the working medium heat comprehensively during the present invention joined relates to the nothing that a kind of power station supercritical DC furnace uses and starts the direct current stove start-up system that boiler water circulating pump can reclaim working medium and heat comprehensively.
(2) background technology:
The power station supercritical DC furnace start-up system of prior art is an important component part of power station supercritical once-through boiler; The purpose that start-up system is set is in the startup of direct current stove, underrun and furnace shutting down process; Set up and keep the minimum mass flow in the water-cooling wall through start-up system, with protection water-cooling wall safety; Satisfy unit safety, economic start and stop simultaneously; The unit underrun reaches carries out accident treatment apace, and realizes the requirement of working medium and heat recovery as far as possible.
What the power station direct current stove start-up system of prior art was commonly used has 4 kinds:
A has the startup boiler water circulating pump, and the direct current stove start-up system of air suspended type flash vessel, drain tank, drainage pump is arranged.(Fig. 1)
B has the startup boiler water circulating pump, the direct current stove start-up system of the hydrophobic in line condenser of boiler startup.(Fig. 2)
C does not have the startup boiler water circulating pump, and the direct current stove start-up system of air suspended type flash vessel, drain tank, drainage pump is arranged.(Fig. 3)
D does not have the startup boiler water circulating pump, the direct current stove start-up system of the hydrophobic in line condenser of boiler startup.(Fig. 4)
A kind direct current stove start-up system is when starting the boiler water circulating pump operate as normal; It is generally acknowledged; Except that direct current stove water-cooling wall crossed a few minutes of the phase of expansion, can reclaim working medium and heat comprehensively, but in fact in order to make water storage tank level control valve and corresponding pipeline, valve exempt from excessive thermal shock; Be admitted to the air suspended type flash vessel from direct current furnace igniting begin to have an appointment 20% startup flow always, this part working medium and heat have basically all lost; Still can clean boot direct current stove when starting the boiler water circulating pump fault, but deteriorated to C kind direct current stove start-up system.
B kind direct current stove start-up system is when starting the boiler water circulating pump operate as normal; It is generally acknowledged, except that the direct current stove crosses a few minutes of the phase of expansion, can reclaim working medium and heat comprehensively; But in fact in order to make water storage tank level control valve and corresponding pipeline exempt from excessive thermal shock; Be admitted to condenser from direct current furnace igniting begin to have an appointment 20% startup flow always, this part working medium is recovered, and thermal loss has fallen; Still can clean boot direct current stove when starting the boiler water circulating pump fault, but deteriorated to D kind direct current stove start-up system.
C kind direct current stove start-up system is when being furnished with liquid level control bypass valve, and few part operating mode can reclaim working medium and heat; During the hydrophobic entering air suspended type of boiler startup flash vessel, can receive serious iron pollution, this moment, not only heat can not reclaim but also working medium also should not reclaim; Because the air suspended type flash vessel generally is arranged in the boiler structure or near, the later pipeline of air suspended type flash vessel outlet is low pressure pipeline, is easy to arrange, is easy to hang, and makes A kind and C kind direct current stove start-up system once obtain more employing; Because misgivings oxygen-eliminating device superpressure, A kind and the C kind direct current stove start-up system quantity of being furnished with liquid level control bypass valve are seldom.
D kind direct current stove start-up system is when being furnished with liquid level control bypass valve, and few part operating mode can reclaim working medium and heat; The hydrophobic in line condenser of boiler startup does not have iron pollution, and recyclable whole working medium can not reclaim heat.B kind and D kind direct current stove start-up system obtain more employing in recent years; Because misgivings oxygen-eliminating device superpressure, B kind and the D kind direct current stove start-up system quantity of being furnished with liquid level control bypass valve are seldom.
C kind and D kind direct current stove start-up system are when being furnished with liquid level control bypass valve; Few part operating mode can reclaim working medium and heat; The condition that liquid level control bypass valve allows to open is that oxygen-eliminating device pressure is not higher than that 0.5MPa, steam-water separator pressure are not higher than 11.0MPa, the steam-water separator water level is not less than three conditions of 2.7m and satisfies simultaneously, to guarantee oxygen-eliminating device safety.
(3) summary of the invention:
As stated; A kind and B kind are furnished with the direct current stove start-up system that starts boiler water circulating pump can reclaim working medium and heat comprehensively; But start boiler water circulating pump system operate as normal for making, need be provided with start boiler water circulating pump recirculation subsystem, start boiler water circulating pump warming-up subsystem, start boiler water circulating pump inlet subcooled water subsystem, start boiler water circulating pump high pressure washing and moisturizing subsystem, start boiler water circulating pump low pressure cooling water subsystem, 6kV station-service electric power system, DCS control system; Starting boiler water circulating pump need work under supercritical pressure and hot conditions; Domesticly still can not produce; 2 1000MW level units are provided with and start boiler water circulating pump and subsystem thereof, and the power station investment increases by 2,000 ten thousand yuan approximately, also will drop into inspection up to a million, maintenance, recondition expense every year in addition.
In addition, the start-up system of being furnished with boiler water circulating pump begins from ignition of the boiler, crosses 20% the startup flow of expand finishing always to have an appointment up to water-cooling wall and is admitted to air suspended type flash vessel or condenser, and the heat of this part working medium can not reclaim.
Therefore, can find a kind ofly need not start the direct current stove start-up system that boiler water circulating pump can reclaim working medium and heat again comprehensively substantial economics is arranged, be the great technological progress in direct current stove start-up system field, power station.
The direct current stove start-up system that the companding container can reclaim the working medium heat comprehensively during the present invention joined and aforementioned A kind, B kind, C kind are different with D kind direct current stove start-up system; The middle companding of being furnished with particular design holds separator, and import of companding appearance separator is connected with the steam-water separator water storage tank through control valve, stop valve in this; The vapour side outlet of companding appearance separator is connected with the low-temperature reheater import through stop valve, control valve in being somebody's turn to do; The water side outlet of companding appearance separator is connected with the hydrophobic import of the boiler startup of oxygen-eliminating device through control valve, non-return valve in being somebody's turn to do.
It is core knowledge property right of the present invention that middle companding holds separator (companding container in the abbreviation); The middle operating pressure that is meant companding appearance separator in this of pressing is between oxygen-eliminating device pressure and steam-water separator pressure; Nearly oxygen-eliminating device pressure; Variation with the oxygen-eliminating device pressure of sliding pressure operation changes, and middle companding holds the operating pressure ratio oxygen-eliminating device pressure high 0.5 of separator to 0.8MPa, crosses at water-cooling wall and allows high 1MPa between the phase of expansion.After companding held separator during the saturation water that is come by the steam-water separator water storage tank got into, companding held separator pressure saturation water and saturated vapor down in being separated into by dilatation, and this saturation water advances oxygen-eliminating device through control valve, non-return valve, recovery working medium and heat; This saturated vapor is introduced the low-temperature reheater import through stop valve, control valve and is reclaimed working medium and heat; The pressure that companding held separator during the control valve of vapour side to the low-temperature reheater import of companding appearance separator can be controlled in suitably opening is in desired value, and companding holds the safe operation of separator and oxygen-eliminating device in guaranteeing.Middle companding holds separator significantly reduces the hydrophobic enthalpy of startup that gets into oxygen-eliminating device; The employing of built-in deaerator has significantly improved the bearing capacity of oxygen-eliminating device again; Like this; No matter cold start, warm starting, hot starting, hot start, very hot startup, the direct current stove start-up system that the companding container can reclaim the working medium heat comprehensively during the present invention joined all can reclaim whole working medium and heat in the supercritical DC furnace start-up course of power station comprehensively.
It is core that the present invention holds separator with middle companding; In the supercritical DC furnace start-up course of power station, call the start-up system steamer pusher side, deaerating type of cycles, water supply system, bypath system, condenser system and boiler side, reheater system together; Under the coordination control of unit DCS (dcs), accomplish direct current stove start-up course safely, economically; Various operating modes all can reclaim working medium and heat comprehensively in start-up course; Reach has the direct current stove start-up system that starts boiler water circulating pump to reclaim the effect of working medium and heat comprehensively, but saves capital expenditure and operation, maintenance cost greatly.
The companding container can reclaim in the direct current stove start-up system of working medium heat companding comprehensively and holds separator and can be arranged in the boiler structure during the present invention joined, and associated conduit, valve arrangement are convenient, inspection, easy to maintenance.。
The present invention can be used for designing the power station supercritical DC furnace start-up system of a new generation, also can be used for the transformation of prior art in labour power station supercritical DC furnace start-up system.
Adopt benefit of the present invention to be:
● cold start, warm starting, hot starting, hot start, very hot startup all can reclaim working medium and the heat in the supercritical DC furnace start-up course of power station comprehensively;
● begin from ignition of the boiler, water-cooling wall crosses expansion and finishes all can reclaim working medium and the heat in the supercritical DC furnace start-up course of power station up to start-up course comprehensively;
● middle companding holds separator and can be arranged in the boiler structure, and associated conduit, valve arrangement are convenient;
● do not have the boiler water circulating pump of startup and subsystem thereof, reduce capital expenditure significantly;
● do not have the boiler water circulating pump of startup, save station service;
● do not have to start boiler water circulating pump, maintenance, maintenance workload are little, and it is low to possess expense;
● operation is simple, safety, reliable, and the stand-by heat energy consumption is low;
● no iron pollution.
(4) description of drawings:
Fig. 1 has the direct current stove start-up system structure chart of boiler water circulating pump air suspended type dewatering capacity-enlarging device drainage pump
Each subsystem that the boiler water circulating pump that do not draw among Fig. 1 needs, too numerous and diverse to avoid system construction drawing.Boiler water circulating pump (8) is pressed into economizer (5) to reclaim working medium and heat to starting hydrophobic supercharging through boiler water circulating pump outlet valve (9) in most times of direct current stove start-up course; But cross a few minutes of the phase of expansion at the direct current stove; Boiler water circulating pump (8) can't be opened the hydrophobic economizer (5) of all sending back to of a large amount of startups of pulsed appearance water storage tank level control valve (31) and water storage tank drain valve (32) and can control the interior water level of steam-water separator (6) in normal range (NR).Cross the expansion native system from the direct current furnace igniting to water-cooling wall and can lose part working medium and heat.
For being more readily understood the function of direct current stove start-up system, high pressure cylinder (17), high pressure main inlet throttle-stop valve (16), high pressure bypass valve (13), intermediate pressure cylinder (20), reheat stop interceptor valve (19), low pressure (LP) cylinder (24), low voltage bypass valve (23), condenser (25), condensate pump (26), high-pressure heater (12), low-pressure heater (28) overlap in also briefly the drawn main portion of part of main of the direct current furnace body cover high temperature superheater (1), pendant superheater (2), low temperature superheater (3), water-cooling wall (4), high temperature reheater (10), low-temperature reheater (11) and steam turbine and accessory system thereof of main cover of the direct current stove start-up system of in Fig. 1, not only having drawn.
Fig. 2 has boiler water circulating pump to start the direct current stove start-up system structure chart of hydrophobic in line condenser
Each subsystem that the boiler water circulating pump that do not draw among Fig. 2 needs, too numerous and diverse to avoid system construction drawing.Boiler water circulating pump (8) is pressed into economizer (5) to reclaim working medium and heat to starting hydrophobic supercharging through boiler water circulating pump outlet valve (9) in most times of direct current stove start-up course; But cross a few minutes of the phase of expansion at the direct current stove; The hydrophobic economizer (5) of all sending back to of a large amount of startups that boiler water circulating pump (8) can't pulsed occur is opened water storage tank level control valve (31) and the hydrophobic recovery valve of startup (21) and is entered condenser (25) through Backpack type temperature-decreased pressure reducer (40) and can control water level in the steam-water separator (6) in normal range (NR).Cross the expansion native system from the direct current furnace igniting to water-cooling wall and can lose the part heat.
For being more readily understood the function of direct current stove start-up system, main cover of the direct current stove start-up system of in Fig. 2, not only having drawn also briefly drawn main the cover of direct current stove and the main portion of the part cover of steam turbine and accessory system thereof.
Fig. 3 does not have the direct current stove start-up system structure chart that boiler water circulating pump has air suspended type dewatering capacity-enlarging device drainage pump
In direct current stove whole starting process, comprise a few minutes of crossing the phase of expansion, the water level in the steam-water separator (6) is regulated by water storage tank water level bypass valve (18), water storage tank level control valve (31) and water storage tank drain valve (32) combination; Start and hydrophobicly get into oxygen-eliminating device (22) part heat via water storage tank water level bypass valve (18) and can reclaim; Serious iron pollution starts hydrophobic not only thermal loss through water storage tank level control valve (31) and water storage tank drain valve (32) entering air suspended type dewatering capacity-enlarging device (33) part, owing to also should not reclaim working medium.
For being more readily understood the function of direct current stove start-up system, main cover of the direct current stove start-up system of in Fig. 3, not only having drawn also briefly drawn main the cover of direct current stove and the main portion of the part cover of steam turbine and accessory system thereof.
Fig. 4 does not have the direct current stove start-up system structure chart that boiler water circulating pump starts hydrophobic in line condenser
In direct current stove whole starting process; Comprise a few minutes of crossing the phase of expansion; Water level in the steam-water separator (6) is started hydrophobic warp startup hydrophobic recovery valve (21) and Backpack type temperature-decreased pressure reducer (40) and is reclaimed at condenser (25) by water storage tank level control valve (31) control, starts hydrophobic thermal loss.
For being more readily understood the function of direct current stove start-up system, main cover of the direct current stove start-up system of in Fig. 4, not only having drawn also briefly drawn main the cover of direct current stove and the main portion of the part cover of steam turbine and accessory system thereof.
The companding container can reclaim the direct current stove start-up system of working medium heat comprehensively during Fig. 5 joined
Core knowledge property right of the present invention is in direct current stove start-up system, to have introduced middle companding to hold separator (37).
The startup that steam-water separator water storage tank (7) comes out hydrophobic in water storage tank outlet shutoff valve (41), water storage tank level control valve (31) get into companding hold separator (37), the steam that dilatation is separated through in companding container exhaust regulating valve (39), middle companding container discharge line valve (36) get into low-temperature reheater (11) and reclaim working medium and heat; The aperture of companding container exhaust regulating valve (39) can be used for the pressure of companding appearance separator (37) in the control in the adjusting; The lower middle pressure saturation water of the enthalpy that dilatation is separated through in companding container drain regulating valve (38), the hydrophobic non-return valve of middle companding container (43) get into oxygen-eliminating device (22); In direct current stove whole starting process, comprise a few minutes of crossing the phase of expansion, the direct current stove start-up system that the present invention is furnished with middle companding appearance separator can reclaim whole qualified working medium and heat.
For being more readily understood the function of direct current stove start-up system, main cover of the direct current stove start-up system of in Fig. 5, not only having drawn also briefly drawn main the cover of direct current stove and the main portion of the part cover of steam turbine and accessory system thereof.High-pressure heater generally has 3, is reduced to one among Fig. 5.In Fig. 5, do not draw unit DCS (dcs) in order to avoid figure is too complicated.
Reference numeral in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5:
1 high temperature superheater, 2 pendant superheaters, 3 low temperature superheaters
4 water-cooling walls, 5 economizers, 6 steam-water separators
7 steam-water separator water storage tanks, 8 boiler water circulating pumps, 9 boiler water circulating pump outlet valves
10 high temperature reheaters, 11 low-temperature reheaters, 12 high-pressure heaters
13 high pressure bypass valves, 14 feed pump outlet valves, 15 feed pumps
16 high pressure main inlet throttle-stop valves, 17 high pressure cylinders, 18 water storage tank water level bypass valves
19 reheat stop interceptor valves, 20 intermediate pressure cylinders 21 start hydrophobic recovery valve
22 oxygen-eliminating devices, 23 low voltage bypass valves, 24 low pressure (LP) cylinders
25 condensers, 26 condensate pumps, 27 blowoff valves
28 low-pressure heaters, 29 height add admission non-return valve 30 height and add the admission stop valve
31 water storage tank level control valves, 32 water storage tank drain valves, 33 air suspended type dewatering capacity-enlarging devices
Companding container steam discharge stop valve in 34 drain tanks, 35 drainage pumps 36
Companding holds in the separator 38 companding container steam discharge control valve in the companding container drain regulating valve 39 in 37
40 Backpack type temperature-decreased pressure reducers, 41 water storage tank outlet shutoff valves, 42 oxygen-eliminating devices decompression quck-opening valve
The hydrophobic non-return valve of companding container in 43
(5) specific embodiment:
Below be example with the power station supercritical DC furnace of a 1000MW grade, in conjunction with Fig. 5, further specify the present invention join in the companding container can reclaim the direct current stove start-up system of working medium heat comprehensively:
The import that middle companding holds separator (37) is connected with the outlet of steam-water separator water storage tank (7) through water storage tank level control valve (31), water storage tank outlet shutoff valve (41); Companding container steam discharge control valve (39), middle companding container height add stop valve (36) and are connected with the import of low-temperature reheater (11) in the vapour side outlet warp of middle companding appearance separator (37); Companding container drain regulating valve (38), the hydrophobic non-return valve of middle companding container (43) are connected with the hydrophobic import of boiler startup of oxygen-eliminating device (22) in the water side outlet warp of middle companding appearance separator (37).
Effective dilatation that middle companding holds separator (37) separates volume 30m
3', design pressure-bearing 4.0MPa, operating pressure 2.0MPa, 310 ℃ of design temperatures; 210 ℃ of operating temperatures, separator main body are upright garden tubular, internal diameter 2m; High 9.6m, hemispherical head, upper and lower hemispherical head is provided with steam discharge and drain outlet respectively; Start hydrophobic upper tangential by upright garden tube and spray into, second dome head is provided with resistance and revolves four-bladed vane, and first dome head steam discharge outlet is provided with drop separator.
Middle companding holds the pre-warm of separator (37) and adopts 0.8 to 1.3MPa station-service auxiliary steam; Water storage tank outlet shutoff valve (41), middle companding container steam discharge stop valve (36), middle companding container drain regulating valve (38) are closed the back and are dropped into automatically.
Water storage tank outlet shutoff valve (41) has the ability of reliable isolation supercritical pressure; The condition that water storage tank outlet shutoff valve (41) is opened is: steam-water separator pressure is not higher than that 9.0MPa, middle companding container steam discharge stop valve (36) open, middle companding container steam discharge control valve (39) is arranged in initial aperture, companding container drain regulating valve (38) is positioned at initial aperture, with logic.
Water storage tank level control valve (31) is a cage balance valve core control valve, and its Cv value should be able to satisfy the draining needs that the various operating modes of direct current stove are crossed the phase of expansion.
Middle companding container steam discharge control valve (39) is a cage balance valve core control valve; Its Cv value should be able to satisfy the direct current stove when very hot startup, can control in companding hold the high 0.5MPa of pressure of the pressure ratio oxygen-eliminating device (22) of separator (37), be not higher than 1.0MPa in the transient process of adjusting.
In companding container drain regulating valve (38) be a cage balance valve core control valve, its Cv value should be able to satisfy the various operating modes of direct current stove and cross the needs of the appearance separator of companding in the phase of expansion (37) to oxygen-eliminating device (22) draining.
Oxygen-eliminating device (22) is a built-in deaerator, and the highest permission operating pressure 2.0MPa, unit be oxygen-eliminating device operating pressure 1.1MPa at full capacity, and direct current stove oxygen-eliminating device pressure when very hot startup is not higher than 1.5MPa; Oxygen-eliminating device (22) is provided with the special purpose interface of companding appearance separator (37) draining in the acceptance; Oxygen-eliminating device (22) is provided with oxygen-eliminating device decompression quck-opening valve (42), when oxygen-eliminating device pressure is higher than 1.5MPa, opens fast, and steam enters the low voltage bypass inlet of condenser (25); When oxygen-eliminating device pressure returned to 1.0MPa, oxygen-eliminating device decompression quck-opening valve (42) cut out automatically.Oxygen-eliminating device decompression quck-opening valve (42) when opening oxygen-eliminating device decompression quck-opening valve (42) outlet pressure be no more than 0.7MPa, the built-in energy dissipator of condenser (25) can be accepted safely; The relieving capacity of oxygen-eliminating device decompression quck-opening valve (42) when inlet pressure 1.5MPa is 0.075BMCR.
Steam-water separator (6), steam-water separator water storage tank (7), middle companding appearance separator (37), oxygen-eliminating device (22), water storage tank outlet shutoff valve (41), water storage tank level control valve (31), middle companding container steam discharge control valve (39), middle companding container height add stop valve (36), middle companding container drain regulating valve (38) and all under the coordination control of unit DCS (dcs), accomplish direct current stove start-up course safely, economically.
Claims (7)
1. join the direct current stove start-up system that middle companding container can reclaim the working medium heat comprehensively for one kind, it is characterized in that: the import that middle companding holds separator (37) is connected with the outlet of steam-water separator water storage tank (7) through water storage tank level control valve (31), water storage tank outlet shutoff valve (41); Companding container steam discharge control valve (39), middle companding container height add stop valve (36) and are connected with the import of low-temperature reheater (11) in the vapour side outlet warp of middle companding appearance separator (37); Companding container drain regulating valve (38), the hydrophobic non-return valve of middle companding container (43) are connected with the hydrophobic import of boiler startup of oxygen-eliminating device (22) in the water side outlet warp of middle companding appearance separator (37); Steam-water separator (6), steam-water separator water storage tank (7), middle companding appearance separator (37), oxygen-eliminating device (22), water storage tank outlet shutoff valve (41), water storage tank level control valve (31), middle companding container steam discharge control valve (39), middle companding container steam discharge stop valve (36), oxygen-eliminating device decompression quck-opening valve (42), middle companding container drain regulating valve (38) are controlled by the coordination of unit DCS dcs all.
2. the companding container can reclaim the direct current stove start-up system of working medium heat comprehensively in according to claim 1 joining, and it is characterized in that it is upright garden tubular that described middle companding holds separator (37) main body, internal diameter 2m; High 9.6m; Hemispherical head, upper and lower hemispherical head is provided with steam discharge and drain outlet respectively, starts hydrophobic upper tangential by upright garden tube and sprays into; Second dome head is provided with resistance and revolves four-bladed vane, and first dome head steam discharge outlet is provided with drop separator.
3. the companding container can reclaim the direct current stove start-up system of working medium heat comprehensively in according to claim 1 joining; It is characterized in that described water storage tank outlet shutoff valve (41) has the ability of reliable isolation supercritical pressure; The condition that water storage tank outlet shutoff valve (41) is opened is: steam-water separator pressure is not higher than that 9.0MPa, middle companding container steam discharge stop valve (36) open, middle companding container steam discharge control valve (39) is arranged in initial aperture, companding container drain regulating valve (38) is positioned at initial aperture, with logic.
4. the companding container can reclaim the direct current stove start-up system of working medium heat comprehensively in according to claim 1 joining; It is characterized in that described water storage tank level control valve (31) is a cage balance valve core control valve, its Cv value should be able to satisfy the draining needs that the various operating modes of direct current stove are crossed the phase of expansion.
5. the companding container can reclaim the direct current stove start-up system of working medium heat comprehensively in according to claim 1 joining; It is characterized in that described middle companding container steam discharge control valve (39) is a cage balance valve core control valve; Its Cv value should be able to satisfy the direct current stove when very hot startup, can control in companding hold the high 0.5MPa of pressure of the pressure ratio oxygen-eliminating device (22) of separator (37), be not higher than 1.0MPa in the transient process of adjusting.
6. the companding container can reclaim the direct current stove start-up system of working medium heat comprehensively in according to claim 1 joining; It is characterized in that described in companding container drain regulating valve (38) be a cage balance valve core control valve, its Cv value should be able to satisfy the various operating modes of direct current stove and cross the needs of the appearance separator of companding in the phase of expansion (37) to oxygen-eliminating device (22) draining.
7. the companding container can reclaim the direct current stove start-up system of working medium heat comprehensively in according to claim 1 joining; It is characterized in that described oxygen-eliminating device (22) is a built-in deaerator, oxygen-eliminating device (22) is provided with the special purpose interface of companding appearance separator (37) draining in the acceptance; Oxygen-eliminating device (22) is provided with oxygen-eliminating device decompression quck-opening valve (42), when oxygen-eliminating device pressure is higher than 1.5MPa, opens fast, and steam enters the low voltage bypass inlet of condenser (25); When oxygen-eliminating device pressure returned to 1.0MPa, oxygen-eliminating device decompression quck-opening valve (42) cut out automatically; Oxygen-eliminating device decompression quck-opening valve (42) when opening oxygen-eliminating device decompression quck-opening valve (42) outlet pressure be no more than 0.7MPa; The relieving capacity of oxygen-eliminating device decompression quck-opening valve (42) when inlet pressure 1.5MPa is 0.075BMCR.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110146964.3A CN102650424B (en) | 2011-06-02 | 2011-06-02 | Direct-current furnace starting system matched with middle-pressure flash tank and used for comprehensively recycling working medium and heat |
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|---|---|---|---|
| CN201110146964.3A CN102650424B (en) | 2011-06-02 | 2011-06-02 | Direct-current furnace starting system matched with middle-pressure flash tank and used for comprehensively recycling working medium and heat |
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| CN103216819A (en) * | 2013-03-29 | 2013-07-24 | 中冶南方工程技术有限公司 | Method and system for controlling pressure release of novel evaporative cooling deaerator |
| CN103776018A (en) * | 2012-10-24 | 2014-05-07 | 哈尔滨锅炉厂有限责任公司 | Starting system for once-through boiler without pump, and starting method |
| CN103953915A (en) * | 2014-05-19 | 2014-07-30 | 章礼道 | Method for recycling startup drained water working medium and heat of secondary reheating boiler through high-pressure heaters |
| CN104713074A (en) * | 2015-03-25 | 2015-06-17 | 西安热工研究院有限公司 | System and method for recycling once-through boiler start-up drained water through pressure flash vessel |
| CN104949095A (en) * | 2015-06-05 | 2015-09-30 | 大唐淮北发电厂 | Supercritical once-through boiler energy-saving operation control method |
| CN106016230A (en) * | 2016-06-28 | 2016-10-12 | 西安热工研究院有限公司 | Once-through boiler starting system and method |
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| CN103776018A (en) * | 2012-10-24 | 2014-05-07 | 哈尔滨锅炉厂有限责任公司 | Starting system for once-through boiler without pump, and starting method |
| CN103216819A (en) * | 2013-03-29 | 2013-07-24 | 中冶南方工程技术有限公司 | Method and system for controlling pressure release of novel evaporative cooling deaerator |
| CN103216819B (en) * | 2013-03-29 | 2015-09-02 | 中冶南方工程技术有限公司 | Vaporizing cooling oxygen-eliminating device pressure diffuses control method and system thereof |
| CN103953915A (en) * | 2014-05-19 | 2014-07-30 | 章礼道 | Method for recycling startup drained water working medium and heat of secondary reheating boiler through high-pressure heaters |
| CN104713074A (en) * | 2015-03-25 | 2015-06-17 | 西安热工研究院有限公司 | System and method for recycling once-through boiler start-up drained water through pressure flash vessel |
| CN104949095A (en) * | 2015-06-05 | 2015-09-30 | 大唐淮北发电厂 | Supercritical once-through boiler energy-saving operation control method |
| CN106016230A (en) * | 2016-06-28 | 2016-10-12 | 西安热工研究院有限公司 | Once-through boiler starting system and method |
| CN106016230B (en) * | 2016-06-28 | 2017-12-19 | 西安热工研究院有限公司 | A kind of Start-up Systems for Direct-through Boilers and method |
| CN111964028A (en) * | 2020-08-25 | 2020-11-20 | 西安热工研究院有限公司 | Thermal power generating unit high-quality working medium recycling system and working method |
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