CN1020951C - System and method for reheat steam temp. control in circulating fluidized bed boilers - Google Patents
System and method for reheat steam temp. control in circulating fluidized bed boilers Download PDFInfo
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- CN1020951C CN1020951C CN90100421A CN90100421A CN1020951C CN 1020951 C CN1020951 C CN 1020951C CN 90100421 A CN90100421 A CN 90100421A CN 90100421 A CN90100421 A CN 90100421A CN 1020951 C CN1020951 C CN 1020951C
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- reheater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D5/00—Devices using endothermic chemical reactions, e.g. using frigorific mixtures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Turbines (AREA)
Abstract
A steam generator having a fluidized bed combustion system that includes a fluidized bed combustor and at least one hot separator, includes a superheater and a reheater. A first stage of reheater and a second stage or final stage of reheater are sequentially disposed in a common gas flue. Cold steam from a turbine is divided into selective first and second portions, the first portion being directed through the first stage of reheater and thereafter recombined with the second portion of cold steam. The recombined first and second portions of steam are directed through the second stage of reheater.
Description
The present invention relates to comprise the power station of second steam turbine and steam raising plant, this steam raising plant has fluidized bed combustion syste, and this system comprises fluidized bed combustor, at least one separator and comprises reheater and the flue gas flue of superheater.
The invention still further relates to control reheater method of temperature in steam generator, this generator has fluidized bed combustion syste, and this system comprises fluidized bed combustor, at least one high-temperature separator and the reheater in the flue gas flue.
At present known have several methods to control reheat steam temperature.
One of temperature controlled method of reheater is to use the gas bypass system at these reheater two ends.Two flue gas streams that separate (one supplies superheater, and one for reheater) are provided in the convection current stream of boiler, and flow-stopping plate for example are set to change the flow that flue gas flows through each section in each stream downstream.The control of reheater outlet steam temperature is the flue gas flow that changes each convection current stream.The major defect of this system is the band dust flue gas stream that flow-stopping plate is arranged in high temperature (260-371 ℃), makes them be subject to denude and be damaged.In addition, being limited in scope with this system's control vapor (steam) temperature.
Other method is to use external heat exchanger.The a part of solid circle thing that is about in the circulating fluidized bed system is diverted in the outside fluidized bed exchanger of installing, and is referred to as external heat exchanger (EHE), and part or whole reheater are set therein.Change the solid substance quantity that flow to EHE, can control the heat and the reheater outlet steam temperature that are passed to reheater.The major defect of this system is that the solids stream control valve needs a large amount of maintenance works, and the reheating pipe surface in the EHE is subject to abrasion, so have influence on the enforcement of this device.
The US4748940 suggestion is provided with the area of heating surface of first reheater in the flue gas stream of CFBC device, and this first reheater is connected with second reheater that is arranged in external heat exchanger (EHE).Be parallel way with the reheater area of heating surface and be connected adjustable bypass conduit.The control of reheater outlet temperature is by the solids flow among the control EHE, also by controlled the steam flow in these two reheaters by this bypass conduit.
The other method of control reheater steam exit temperature is to use spray type desuperheater.This method is to utilize water spray to make the superheated steam cooling, thus control reheater outlet steam temperature.This method is simpler, but fails generally to adopt because of the decrease in efficiency that makes circulation.
Also have a kind of method to be to use excess air.Be supplied to the excess air of boiler to can be used to control the vapor (steam) temperature of heat again.But therefore method has adverse effect to boiler efficiency and is out of favour.
Also having a kind of method is to adopt flue gas recirculation.Promptly use a large amount of flue gas recirculation to reach the rated value of reheater outlet steam temperature.But this method need be used the flue gas recirculation blower fan to carry high temperature to contain dust flue gas and want additive decrementation power, so this method is imperfect.
So the purpose of this invention is to provide improving one's methods and system of reheat steam temperature control.
Main purpose of the present invention is to provide improved system and method for control reheater outlet steam temperature in CFBB.
By a main aspect of the present invention, in having the steam generator of fluidized bed combustion syste, comprise a fluidized bed combustor, at least one separator, and a reheater in the flue gas stream is characterized in that:
In a shared flue gas flue, be provided with first section of reheater and second or latter end in the serial connection mode;
To shunt the device that become selectable first and second parts and the guiding of described first be passed through first section in this reheater from the Low Temperature Steam of turbine;
Described first and second parts are merged and will merge conductance and draw device by second section in this reheater.
In preferred version, this steam generator comprises the device that is used to control this reheater second or latter end temperature, and comprises the device that the guiding of the part selected of Low Temperature Steam and first section in the described reheater of bypass is directly entered described reheater second or latter end.
It is characterized in that by method of the present invention:
Reheater is divided into first section and second section or latter end, and first and second sections in reheater is arranged in the common flue gas flue in the serial connection mode;
The Low Temperature Steam that is back to this reheater is split into selectable first and second parts, and first section in this reheater is passed through in this first's guiding;
With this first with second portion remerges and will merge conductance draws by this reheater second or latter end.
The present invention is above-mentioned and other purpose is illustrated by aftermentioned and accompanying drawing is illustrated:
Fig. 1 implements typical recycling fluidized-bed combustion boiler system flow of the present invention;
Fig. 2 is the flow process of another program of the present invention;
Fig. 3 is the layout flow process that two typical boilers are connected to single turbine.
With reference to Fig. 1, use the power station of typical recycling fluidized-bed combustion boiler shown in the figure, comprising superheater and reheater and represent a preferred version of the present invention.This steam generator system 10 comprises fluidized bed combustor 12, and wherein combuster 14, imports combustible material, noncombustibles material in the combustion chamber, also has material, primary air and an auxiliary air of additive or recirculation.In this combustion chamber, by means of making a material have correct storage to make bed remain on fluidized state with correct air mass flow.There is the end 16 of lattice-shaped this combustion chamber, and air is introduced by 16.The wall of combustion chamber preferably is made of the membranous type tube wall, has on it or not with heat-resisting cover layer.
First and second sections of superheater is to be arranged in the combustion chamber.Material in the combustion chamber is brought into the high-temperature separator 24 from the combustion chamber by means of flue gas 22, and solids separates with flue gas therein, and is back to the bottom, combustion chamber by particle recirculating system 26,28 and 30, finishes recirculation.They passed through fluidized bed cooler or similar devices earlier before turning back to this combustion chamber.
The closed circuit of feed water and main superheater are not pith of the present invention, so do not illustrate in the drawings.
Flue gas from high-temperature separator enters convection current stream 34 via flue 32.In this convection current stream, be provided with the superheater 38 of single-stage, and be provided with first section 42 and second sections 40 of reheater in the upstream of the downstream of superheater 38 and economizer 44.Reheater also can be more than two sections, and make one section at end just in the downstream of superheater 38, promptly present 40 position.Arranging like this is contraflow heat exchanger, and flue gas is to dirty, and hot water and steam is to the upper reaches again.The temperature that superheater 38 helps flue gas to flow to reheater 40 is set in this stream remains below this critical-temperature.Arranging like this together with hereinafter the bypass feature of explanation being carried out uniqueness and control effectively to the temperature in this reheater section.
When the vapor (steam) temperature of leaving this particular segment (in contraflow heat exchanger is arranged) approached to enter the flue-gas temperature of this section, the result who reduces the steam flow that enters this section significantly reduced caloric receptivity.When this vapor (steam) temperature reaches this flue-gas temperature, can be used for the efficient heat minimizing that heat is transmitted.This is with regard to for to provide the foundation by the used principle of reheat temperature control system of the present invention.
Electricity generation system as shown in Figure 1 is to a two stage turbine supply steam.In illustrated layout, enter the entrance side of high pressure turbine 52 by an outlet header 46 and conduit 48 and valve 50 from the steam of superheater 38.The Low Temperature Steam that leaves turbine 52 turns back to reheater 42 and 40 by recurrent canal 53.At the reheater place, connect recurrent canal 53 at 55 places and with this Low Temperature Steam part bypass by shunt valve 54, the remainder of Low Temperature Steam enters the house steward 58 of first section 42 in reheater by differential pressure control valve 56.
Steam by reheater 42 flows out to house steward 60, converges in the bypass segment of point 62 with Low Temperature Steam.Flow control valve 64 is being set with the flow between control first section intake header of reheater and this shunt valve on the shunt valve 54.Flow into the house steward 66 of reheater second or latter end 40 at 62 steam after converging, be further heated at this, and flow out, enter the low-pressure stage or the second level 74 of turbine through steam supply pipe 70 and valve 72 via outlet header 68.Because the Low Temperature Steam ratio between second section 42 in shunt valve 54 and the reheater can be selected, for reheater control temperature in each section provides effectively and means efficiently.
Control valve 56 and 64 to arrange be such selection, be to make whole vapor (steam) temperature control range all reach controlled processing procedure degree, and permit whole reheaters surface to be arranged in the convection current stream of this boiler that making no longer needs to adopt reheater surface in stove.Way also can be accomplished the simplification start-up routine under the situation of linking same turbine system more than a boiler like this.Under this arranged situation, this group valve just can provide the means of reheated steam flow equalization under the different operating condition.
In CFBB, burning is to carry out in the fluid bed of inert material.The fluidised bed material of leaving burner is to utilize a high temperature gatherer (for example high temperature cyclone separator) to return by the suitable seal device.When operation, air and fuel to be sent in the combustion chamber 14, bed material wherein is by the correct fluidized state that remains on of the flow of air and bed material.The fluidisation air is to send into by the lattice-shaped structure 16 that is positioned at the bottom, chamber.The solids that flue gas, combustion product are come together with band flow to high-temperature separator 24 via flue 22 then at first to superheater 18 and 20 transfer heat, therein solids separation is opened and is back to the combustion chamber by recirculating system 26,28 and 30.High-temperature flue gas comes out from high-temperature separator then, enters convection current highway section 34 via flue 32, and 40 and 42 each sections of superheater latter end 38 and reheater are set in this section.
In this system, be provided with three superheater sections, promptly 18,20 and 38, wherein 38 be arranged in the smoke convection stream.When needed, desuperheater can be arranged between each section superheater, be used to control vapor (steam) temperature.40 and 42 two sections of reheater is to be arranged in convection current stream 34, and is connected with control valve and pipeline, so that accurately control the reheater outlet steam temperature.Pipe-line system is to make Low Temperature Steam enter this system again at pipe 53 places, and optionally it is divided into two-way at contact 55 places with shunt valve 54.Wherein one the tunnel passing to first section in reheater, is to enter after distributing by inlet house steward 58.Another road enters second section in reheater via valve 64 and inlet house steward 66.Distributing for the selection of stream is to comply with required control temperature and proportional, and finishes this distribution by valve 56 and 64.
The high-temperature steam that leaves first section in reheater from the outlet header with mix from flow control valve 64 downstreams and via the Low Temperature Steam of shunt valve 54, mix after enter second section in reheater by inlet house steward 66.Flow by first section in reheater is to be controlled by the appropriate manipulation of control valve 56 and 64, thereby further the vapor (steam) temperature of second section 40 in reheater is left in control.High-temperature steam from reheater second or latter end is back to turbine by high-temperature reheat pipe road 70.
Come the setting of control valve 56 by pressure reduction response control apparatus 80, in order to control control valve 64 resulting pressure reduction.Control device 80 is the pressure reduction between the pressure of 42 outlets of response Low Temperature Steam pipe 53 and reheater and shunt valve 54 tie points 62, is represented by the dotted line among Fig. 1 84.Control device 80 is to set up according to the function as this boiler load to come control valve 56.
Valve 64 on the shunt valve 54 is to be controlled by temperature-responsive control device 82, and it responds to reheater second or latter end 40 outlet steam temperatures, by 86 expressions of dotted line among Fig. 1.In described scheme, the temperature of reheater 40 for example is maintained at about 538 ± 10 ℃.Begin to surpass 543 ℃ when the vapor (steam) temperature of leaving reheater 40 rises to, valve 64 leaves the more Low Temperature Steam of ambassador and directly enters reheater 40.Begin to be lower than 532 ℃ when this temperature drops to, valve 64 just turns down, and reduces to flow to second section 40 bypass Low Temperature Steam flow.
System shown in Fig. 2 is identical with big of Fig. 1, and difference is that superheater 38 is arranged between reheater 40 and 42.The superheater 38 of single hop is set in the convection current stream, and reheater is positioned at the superheater upstream for second section 40, and first section 42 is positioned at its downstream; Province's heat energy device 44 is set, so different with that shown in Figure 1 in the downstream of superheater 38.Owing in the upstream of superheater 38 second section 40 in reheater is set, so can when less load, obtain more heats.So just can enlarge the control range of vapor (steam) temperature, and influential to the control range of superheater also be very little.The reheat steam temperature control range helps two boilers are used for a turbine after enlarging, because the easier temperature of accomplishing cooperates.
Because this arrangement mode is second section 40 upstream that is positioned at superheater 38 of reheater, make the temperature control scope of each section of reheater can be wideer.Because flue gas through reheater 40, passes through superheater 38 earlier again, makes this boiler load up to a certain degree, can not occur in the situation of reheater 40 flue-gas temperature subcritical temperature.Therefore,, have only after reaching the 25-30% load because superheater 38 is in stream after reheater 40, just can be in reheater 40 flue-gas temperature subcritical temperature.At this moment, can obtain Low Temperature Steam by the present invention and control temperature.If desired at the high load capacity point, the pipe metal material can be upgraded and permit that peak load is about 35-40%.Do not need to flow through this reheater before this device reaches the 25-40% load, this is another advantage of the present invention.
System shown in Figure 3 is identical with big of Fig. 1, and difference is just with two boilers.In this system, the numbering of the first cover boiler plant is identical with Fig. 1, and the numbering of the second cover boiler plant all is with a left-falling stroke.So in this layout, disclosed boiler turbine system is by turbine of two boiler supplyings.The essential characteristic that this system need possess provides control and flows to the device of each Boiler Steam flow, is fully in possible operating condition scope thereby make the reheater outlet steam temperature.In illustrated system, be that two cover boilers are equipped with two cover control device and pipeline.
The control valve 56 and 64 that is used to control reheat steam temperature can be used for balancing flow, and keeps in the scope of reheater outlet temperature under normal and upset operation condition.In this layout, pressure-reducing valve 82 and 82 ' together with desuperheater 76 and 78 ' and when first cover is online, start under the situation of second cover flexibility is provided in cold start-up, thermal starting.There has been this single system can no longer need senior, advanced vapor mixing system.Thereby simple and effectively reheater outlet steam temperature control system and method under the loading condiction that changes are provided.
When carrying out cold start, send into fuel and combustion air, take fire to combustion chamber 14.Because after burning produced heat, the high-temperature flue gas of burning moved up in the combustion chamber, with the water in the heat transferred chamber wall and superheater 18 and 20.Via flue 22, enter high-temperature separator 24 from high-temperature flue gas, combustion product and the solids of combustion chamber, tell solids and send the combustion chamber back at this.High-temperature flue gas enters convection current stream 34 by flue 32, at this according to the order of sequence with first section 42 in heat transferred superheater 38, reheater second or latter end 40 and reheater.Before Low Temperature Steam flows, high-temperature flue gas this system that begins to flow through.Before steam taking place and start turbine, boiler is lighted and is made fuel combustion a period of time, so that the flue gas of heat to be provided.After turbine starts, begin again hot Low Temperature Steam just now.
Along with high-temperature flue gas is defeated by water and steam in water wall, superheater and the reheater with heat, its temperature through each section after all corresponding decline.Should point out that the flue-gas temperature of leaving the combustion chamber when full load is 843-927 ℃ of scope.The temperature difference between the cigarette G﹠W is big more, and heat is transmitted fast more, and flue gas is just low more from respective heater warp its temperature later.
Therefore, when flue gas has passed through superheater 38, its temperature will be lower than when boiler and be the critical-temperature at reheater 40 when following of certain load.So because superheater 38 is before reheater 40 in the flue gas stream, its flue-gas temperature will be lower than and reaches about 40-50% load before in the critical-temperature of reheater 40.At this moment, can control temperature with Low Temperature Steam by the present invention.This reheater owing to need not flow through before this device reaches 50% load becomes another advantage of the present invention.Most of existing systems burn to prevent at the commitment that starts (heat or cold start-up) this reheater that all requires to flow through, and therefore must adopt expensive bypath system.But the layout type of employing native system does not just need bypass, and can shorten the start-up time of system.
Other modification or change can also be made for the disclosed scheme of preamble, and in some cases, some other feature can be under the situation that is not corresponding some feature of employing, adopted.Therefore, although the present invention demonstrated and illustrated by a concrete scheme, do not say self-evident to be, in the spiritual essence that does not deviate from claim of the present invention with do not exceed under the situation of its scope, can make multiple change and modification to the present invention.
Claims (8)
1, a kind of in electric generating station system the reheater temperature control system of CFBB, comprising a two-stage steam turbine (52,74) and a steam boiler with fluidized bed combustion syste, comprise a fluidized bed combustor (12) in the described combustion system, at least one separator (24), and a gas flue (34), be provided with a reheater and superheater (38) therein, it is characterized in that:
In the flue gas flue (34) of this boiler, first section (42) of reheater and second or the latter end (40) of reheater are set with tandem moor;
To become the device of selectable first and second parts from the Low Temperature Steam shunting of turbine (52), it comprises the flow control valve (64) that is arranged on this bypass conduit.
2, by the control system of claim 1, it is characterized in that described superheater (38) is arranged on the downstream of described reheater second section (40).
3, by the control system of claim 1, it is characterized in that having a pressure-control valve (56) at least in the porch that passes to reheater first section (42), this valve is the pressure differential between the return steam pressure of response and first section outlet of the reheater steam pressure.
4,, it is characterized in that the described outlet temperature that is used to shunt the device described reheater of response second section (40) of Low Temperature Steam controls by the control system of claim 1.
5, by the control system of claim 1, the temperature that it is characterized in that described reheater second section (40) is to be maintained at about 538 ± 10 ℃.
6, a kind of reheater method of temperature of controlling CFBB in the electric generating station system, described boiler has fluidized bed combustor (12), at least one high-temperature separator (24), an and flue gas flue (34), this boiler also comprises a two-stage steam turbine (52,74), first section and second section (42 an of reheater, 40), to become the device of first and second parts from the shunting of the Low Temperature Steam of turbine (52), described second portion steam will be directed at the bypass conduit (54) of first section (42) of this reheater, and the device that the described first and second part steam are converged again, it is characterized in that
With first section (42) of first's steam by reheater, and after this first and second parts steam is converged again,
With second section (40) of this steam by reheater, these reheaters are flue gas flue (34) and the tandem settings that are arranged in boiler, and
This Low Temperature Steam is split into first and second parts control by means of being arranged at flow control valve (64) on this bypass conduit (54).
7,, it is characterized in that also comprising the vapor (steam) temperature of described reheater second of control or latter end, thereby respond this temperature conditions and described Low Temperature Steam shunting is become first and second parts by the method for claim 6.
8,, it is characterized in that controlling the pressure differential between described return steam pressure and first section outlet of the described reheater steam pressure, thereby described Low Temperature Steam shunting is become first and second parts by the method for claim 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30162189A | 1989-01-24 | 1989-01-24 | |
| US301,621 | 1989-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1045168A CN1045168A (en) | 1990-09-05 |
| CN1020951C true CN1020951C (en) | 1993-05-26 |
Family
ID=23164149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90100421A Expired - Lifetime CN1020951C (en) | 1989-01-24 | 1990-01-23 | System and method for reheat steam temp. control in circulating fluidized bed boilers |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0455660B1 (en) |
| JP (1) | JP2532750B2 (en) |
| KR (1) | KR0147059B1 (en) |
| CN (1) | CN1020951C (en) |
| AU (1) | AU639437B2 (en) |
| CA (1) | CA2045571C (en) |
| CZ (1) | CZ284932B6 (en) |
| DD (1) | DD291803A5 (en) |
| DE (1) | DE69002758T2 (en) |
| ES (1) | ES2045903T3 (en) |
| LT (1) | LT3379B (en) |
| LV (1) | LV11061B (en) |
| PL (1) | PL166038B1 (en) |
| UA (1) | UA24009C2 (en) |
| WO (1) | WO1990008917A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893232A (en) * | 2010-06-24 | 2010-11-24 | 东南大学 | Improved method of limitation generalized predictive control for thermal power unit reheat steam temperature |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10039317A1 (en) * | 2000-08-11 | 2002-04-11 | Alstom Power Boiler Gmbh | Steam generating plant |
| FI120658B (en) * | 2005-05-04 | 2010-01-15 | Metso Power Oy | Heat control method for intermediate overheating steam, heat control system and power plant |
| WO2014048089A1 (en) * | 2012-09-26 | 2014-04-03 | 上海伏波环保设备有限公司 | Natural circulation indirect type flue gas reheater |
| KR102051101B1 (en) * | 2013-07-19 | 2019-12-02 | 한국전력공사 | Variable heat exchanger of circulating fluid bed boiler |
| JP6317652B2 (en) | 2014-09-12 | 2018-04-25 | 株式会社東芝 | Plant control device and combined cycle power plant |
| CN105889899B (en) * | 2014-12-16 | 2018-06-15 | 华北电力大学（保定） | A kind of overheating steam temperature regulating system and method suitable for putting into operation under SCR underloads |
| CN104501425A (en) * | 2014-12-19 | 2015-04-08 | 中国科学院电工研究所 | Solar thermal power generation control circulating heat absorber with overheater start protecting function |
| CN106545833B (en) * | 2016-10-28 | 2018-07-17 | 杭州红山热电有限公司 | Boiler steam and water circuit |
| HUE056813T2 (en) * | 2017-07-27 | 2022-03-28 | Sumitomo SHI FW Energia Oy | A fluidized bed boiler plant and a method of preheating combustion gas in a fluidized bed boiler plant |
| KR102093302B1 (en) | 2018-07-19 | 2020-04-23 | 한국생산기술연구원 | Sand falling type circulating fluidized bed boiler having a plurality of riser and its operation method |
| EP3848562A4 (en) * | 2018-10-10 | 2022-09-28 | Beijing Cynertec Co., Ltd. | Method for improving rankine cycle efficiency |
| CN113753237B (en) * | 2021-09-21 | 2023-04-07 | 中国航空工业集团公司西安飞机设计研究所 | Temperature control decoupling method for refrigeration assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54151743A (en) * | 1978-05-22 | 1979-11-29 | Babcock Hitachi Kk | Steam temperature controller |
| DE3125849A1 (en) | 1981-07-01 | 1983-01-20 | Deutsche Babcock Anlagen Ag, 4200 Oberhausen | STEAM GENERATOR WITH CIRCULATING ATMOSPHERIC OR PRESSURE-CHARGED FLUEL BURN FIRING AND METHOD FOR ITS REGULATION |
| JPS58164093A (en) * | 1982-03-25 | 1983-09-28 | Toshiba Corp | Non-volatile memory |
| JPS59219603A (en) * | 1983-05-27 | 1984-12-11 | 三菱重工業株式会社 | Reheating boiler for factory |
| DE3625373A1 (en) | 1986-07-26 | 1988-02-04 | Steinmueller Gmbh L & C | STEAM GENERATOR WITH CIRCULATING ATMOSPHERICAL OR PRESSURE-CHARGED FLUEL BURN FIRING, AND METHOD FOR ITS REGULATION |
| DE3625992A1 (en) * | 1986-07-31 | 1988-02-04 | Steinmueller Gmbh L & C | METHOD FOR BURNING CARBON-CONTAINING MATERIALS IN A CIRCULATING FLUID BED, AND A FLUET BURNING PLANT FOR CARRYING OUT THE METHOD |
| DE3642396A1 (en) * | 1986-12-11 | 1988-06-16 | Siemens Ag | STEAM GENERATOR SYSTEM WITH A CIRCULATING FLUID BED |
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1990
- 1990-01-23 AU AU49419/90A patent/AU639437B2/en not_active Ceased
- 1990-01-23 WO PCT/FI1990/000026 patent/WO1990008917A1/en active IP Right Grant
- 1990-01-23 DD DD90337276A patent/DD291803A5/en not_active IP Right Cessation
- 1990-01-23 DE DE90901818T patent/DE69002758T2/en not_active Expired - Lifetime
- 1990-01-23 ES ES90901818T patent/ES2045903T3/en not_active Expired - Lifetime
- 1990-01-23 CA CA002045571A patent/CA2045571C/en not_active Expired - Fee Related
- 1990-01-23 CN CN90100421A patent/CN1020951C/en not_active Expired - Lifetime
- 1990-01-23 UA UA93002096A patent/UA24009C2/en unknown
- 1990-01-23 JP JP2502023A patent/JP2532750B2/en not_active Expired - Lifetime
- 1990-01-23 EP EP90901818A patent/EP0455660B1/en not_active Expired - Lifetime
- 1990-01-23 KR KR1019900702150A patent/KR0147059B1/en not_active IP Right Cessation
- 1990-01-24 CZ CS90330A patent/CZ284932B6/en not_active IP Right Cessation
- 1990-01-24 PL PL90283427A patent/PL166038B1/en unknown
-
1993
- 1993-06-28 LV LVP-93-662A patent/LV11061B/en unknown
- 1993-08-10 LT LTIP842A patent/LT3379B/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893232A (en) * | 2010-06-24 | 2010-11-24 | 东南大学 | Improved method of limitation generalized predictive control for thermal power unit reheat steam temperature |
| CN101893232B (en) * | 2010-06-24 | 2012-02-01 | 东南大学 | Improved method of limitation generalized predictive control for thermal power unit reheat steam temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1045168A (en) | 1990-09-05 |
| JPH04503095A (en) | 1992-06-04 |
| KR910700434A (en) | 1991-03-15 |
| EP0455660A1 (en) | 1991-11-13 |
| CA2045571A1 (en) | 1990-07-25 |
| WO1990008917A1 (en) | 1990-08-09 |
| CS33090A3 (en) | 1992-03-18 |
| PL166038B1 (en) | 1995-03-31 |
| ES2045903T3 (en) | 1994-01-16 |
| DE69002758T2 (en) | 1993-12-16 |
| JP2532750B2 (en) | 1996-09-11 |
| AU639437B2 (en) | 1993-07-29 |
| CZ284932B6 (en) | 1999-04-14 |
| DD291803A5 (en) | 1991-07-11 |
| LTIP842A (en) | 1995-02-27 |
| EP0455660B1 (en) | 1993-08-11 |
| UA24009C2 (en) | 1998-08-31 |
| CA2045571C (en) | 1995-09-12 |
| LV11061A (en) | 1996-02-20 |
| LV11061B (en) | 1996-06-20 |
| KR0147059B1 (en) | 1998-08-17 |
| DE69002758D1 (en) | 1993-09-16 |
| LT3379B (en) | 1995-08-25 |
| AU4941990A (en) | 1990-08-24 |
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| C14 | Grant of patent or utility model | ||
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| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Helsinki Applicant after: A. Ahlstrom Corp. Address before: Finland Applicant before: A Ahlstrom Corp. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: A. AHLSTROM CORP. TO: FOSTER WHEELER ENERGIA CO., LTD. |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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Granted publication date: 19930526 |