CN1080040A - The method and apparatus of steam regulation generator exports place flue-gas temperature - Google Patents
The method and apparatus of steam regulation generator exports place flue-gas temperature Download PDFInfo
- Publication number
- CN1080040A CN1080040A CN93106571A CN93106571A CN1080040A CN 1080040 A CN1080040 A CN 1080040A CN 93106571 A CN93106571 A CN 93106571A CN 93106571 A CN93106571 A CN 93106571A CN 1080040 A CN1080040 A CN 1080040A
- Authority
- CN
- China
- Prior art keywords
- flue
- gas temperature
- feedwater
- heating surface
- bringing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
- F22D1/12—Control devices, e.g. for regulating steam temperature
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Chimneys And Flues (AREA)
- Devices For Medical Bathing And Washing (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention relates to utilize the method and apparatus of heating surface (5) steam regulation generator (1) the exit flue-gas temperature (T) of conduction heat between flue gas (R) and feedwater (S).When entering purifier (7), reduce to certain rated value (T for fear of flue-gas temperature
s) below, according to the method for the invention and equipment, as flue-gas temperature (T
i) heating surface (5) that utilized of the feedwater (S) of should corresponding change when changing flowing.
Description
The heating surface that the present invention relates to a kind of employing conduction heat between flue gas and feedwater comes the method and apparatus of steam regulation generator exports place flue-gas temperature.
In a steam generator, produce the used steam of steam turbine by indirect exchange heat between the feedwater of hot flue gas and introducing water-steam-circulation.Flue gas is in the combustion chamber, for example produce in a kind of combustion chamber (EP-PS0,340,537) of low temperature distillation burner or the burning in the combustion gas turbine by a kind of fossil fuel.Feedwater in steam generator along the heating surface of tubulose normally or tube bank shape flow and in this process from the smoke absorption heat.Chilled flue gas is purified in the steam generator exit, then among chimney is discharged to surrounding environment.
In a kind of wet type gas cleaning, the washing lotion of mixing reaction product is by means of the smoke evaporative that leaves steam generator, the reaction product that wherein will separate out dry.For fear of the harmful deposition in purifier, the flue-gas temperature in the purifier porch can not be lower than setting.Wherein, about the flue-gas temperature aspect in steam generator exit two factors being arranged is mutual contradiction: steam generator efficient descend with flue-gas temperature increase in, the danger that purifier breaks down also increases thereupon.Therefore usually when full-load operation the temperature in steam generator exit be higher than should be low as much as possible under the minimum flue-gas temperature condition that purifier allowed.Yet flue-gas temperature descends when sub-load is worked, so that does not take special measure just to occur the danger of job failure in purifier.Therefore particularly when working, sub-load is necessary to regulate and control the flue-gas temperature in steam generator exit.
For this reason, in the method that people know, fuel will burn along with improving excess air, like this, shift hot conduction and improved flue-gas temperature in the steam generator exit in the convection current of steam generator.The shortcoming of the method is to be directed at because improved the flue gas volume flow loss of available heat.
In another method, thereby the portion of hot flue gas mixes with chilled flue gas in the steam generator exit at the Hui Daozhong of heating face and can keep the flue-gas temperature stipulated.The shortcoming of this method is to provide a flue gas branch road capacious.Owing to making adjustment, formed inhomogeneous air-flow when mixing becomes very difficult in addition.
In a method that often adopts, particularly when sub-load work, feed water before entering steam generator by with water-steam-circulation by steam turbine in the indirect exchange heat face of the steam obtained heat in advance.Yet this will cause obtaining limited gross efficiency.
Task of the present invention is to provide a kind of simple especially method of regulating flue-gas temperature.This method is particularly useful for the adjusting of following situation, when regulating, also is that purifier porch flue-gas temperature will avoid reducing to certain below the minimum of a value reliably simultaneously in the steam generator exit promptly.The simple as far as possible equipment that can reach higher gross efficiency should be provided in addition.
Decide with regard to method, this task is used for heat conducting effective heating surface by change in the present invention and solves.
When flue-gas temperature departed from certain setting, a kind of superior structural that adopts the method was the bringing-up section that adds right face front and rear row that can connect or disconnect along the feedwater flow direction.At this, when flue-gas temperature descended, particularly when sub-load is worked, the bringing-up section apart from the nearest heating surface in steam generator exit in the feedwater that be on purpose will flow against the flue gas flow path direction earlier disconnected.Along with flue-gas temperature further descends, the contrary direction that flows along flue gas successively disconnects the bringing-up section of more heating surface.After ging up, flue-gas temperature again they are successively connected with opposite order.
With regard to equipment, this task is to solve like this according to the present invention, and the big I of heating surface of the water supply point utilization of promptly flowing is controlled with the height of flue-gas temperature.
In the embodiment of an excellence of this equipment, heating surface comprises somely to be arranged before and after the flue gas flow path direction and can supply with the bringing-up section that can connect separately or disconnect that water passes in the opposite direction.Wherein, each bringing-up section can link to each other with an adjusting device at input.In addition, each bringing-up section is preferably in the porch an inlet gatherer that is used to collect feedwater.
This equipment preferably includes one and is connecting the adjuster of an adjusting device at least at the port of export, and its input quantity is the actual value of flue-gas temperature.
Several embodiments of the present invention will further be set forth with accompanying drawing; Wherein
Fig. 1 shows a front and is connecting the steam generator that combustion chamber, back are connecting purifier;
Fig. 2 shows the shown in Figure 1 local II after the amplification, comprises some bringing-up sections of the heating surface that can connect respectively or disconnect.
Parts identical in above two accompanying drawings adopt identical symbolic representation.
A temperature sensor 13 that is connected with adjuster 14 is arranged in steam generator 1 exit.Adjuster 14 in the adjusting device of output and some general designations 15 with valve 15a, 15b, 15c(Fig. 2) form connects.To influence through the feedwater S that pipeline 30 enters steam generator 1 by means of these adjusting devices 15 and be used for distribution on the energy-conservation heating surface of preheating feedwater S, this point back also will further singly be stated.
When steam generator 1 work, the flue gas R that produces in combustion chamber 2 passes through steam generator 1 along direction shown in the arrow.Wherein, the heat of hot flue gas R is given the feedwater S that flows in the water-steam-circulation of the steam turbine that is not carefully drawing through heating surface and conduction.The chilled flue gas R that leaves steam generator 1 purifies in purifier 7.When full-load operation, the flue-gas temperature Ti in steam generator 1 exit also has about 220 ℃.
Purification is carried out by means of a kind of washing lotion that contains alkaline components, for example NaOH in wet cleaner 10.Contained acidic materials, for example chlorine-bearing compound chemical combination among alkaline components and the flue gas R, its reaction product mainly is a salt.Washing lotion is sent into ejector dryer 8 with reaction product through pipeline 11.Washing lotion is evaporated owing to contacting with flue gas R there.With evaporation simultaneously dry reaction product, promptly mainly be salt, will in filter 9, separate out, flue gas R is cooled to about 70 ℃ temperature in clarifier 7.
As shown in Figure 2, the energy-conservation-heating surface 5 of each S preheating that is used to feed water is divided into some tandem bringing-up sections, preferably is divided into three bringing-up sections 20 to 22.In the bringing-up section 20,21 and 22 each connects at arrival end and at the port of export and gatherer 23,24,25 and 26.In addition, any one in the bringing-up section 20 to 22 is all through inlet gatherer 23,24,25 and valve 15a, and one among 15b and the 15c links to each other.Valve 15a, 15b, 15c is connected with public feedwater piping 30.Gatherer 26 is connected with other heating surface 5 of steam generator 1 in the mode of carefully not drawing through pipeline 31.
Feedwater S passes meander shape tube bank 35 with the contrary direction of flue gas R flow direction, and the tube bank wall constitutes heating surface 5.At this, flue gas R will cool off, and at first be that valve 15a opens and valve 15b and 15c closure.When the flue-gas temperature Ti in steam generator 1 exit descended, the heating surface 5 that is used for effectively conducting heat reduced.For this reason, at first be that valve 15b opens and valve 15a closure.Valve 15c continues closed.If flue-gas temperature Ti continues to descend, when for example flue-gas temperature Ti reached the numerical value that can also allow just for trouble-free gas cleaning when sub-load is worked, valve 15c opened and valve 15b closure.Thereby the bringing-up section 20 of heating surface 5 and 21 disconnects and separating with water-steam-circulation like this.In all anhydrous pipeline that flows through 35 of bringing-up section 20 and 21, still there is feedwater S to exist.Because under this pressure state, the boiling point of water always is higher than the flue-gas temperature in waste heat boiler 4 scopes, so the anhydrous bringing-up section that flows through 20,21 can not be evaporated in the heating surface 5.
If the flue-gas temperature Ti in steam generator 1 exit gos up, for example recovered the full-load operation state again, then be used for effectively conducting heating surface 5 increases of heat.For this reason, along with, passing through corresponding switching valve 15a in the variation of steam generator 1 exit flue-gas temperature Ti, 15b, 15c receive the bringing-up section 20 and 21 of heating surface 5 in water-steam-circulation successively with opposite order and go.This adjusting is passed through to valve 15a, 15b, and the adjuster 14 that 15c sends corresponding control signal carries out.These control signals by one according to actual measurement flue-gas temperature Ti(actual value) derive with the fiducial value that departs to form of rated value Ts.
In the steam generator 1 that adopts usually, some so-called exhaust collectors have been arranged, when reconstruction, they can be called inlet gatherer 23 to 25 in simple mode.Like this, this temperature control equipment includes only feedwater piping 30 and two or more at least valve 15a, 15b, the some nipples road between the 15c aspect feedwater.
Claims (8)
1, utilizes the method for heating surface (5) the steam regulation generator exports place flue-gas temperature of conduction heat between flue gas (R) and feedwater (S), it is characterized in that corresponding change is effective to conduct the heating surface of heat (5).
2, according to the described method of claim 1, it is characterized in that, when flue-gas temperature (Ti) offrating (Ts), connect or disconnect the bringing-up section (20,21,22) of the edge feedwater tandem heating surface of (S) flow direction (5).
3, according to the described method of claim 2, it is characterized in that, when flue-gas temperature Ti descends, at first close bringing-up section (20) on the nearest heating surface (5) in turn-off steam generator exit for the feedwater (S) of flowing with the contrary direction of flue gas flow path direction.
4, utilize the equipment of heating surface (5) the steam regulation generator exports place flue-gas temperature of conduction heat between flue gas (R) and feedwater (S), it is characterized in that the heating surface that the feedwater (S) of flowing is utilized can be controlled according to the variation of flue-gas temperature (Ti).
According to the described equipment of claim 4, it is characterized in that 5, heating surface (5) is divided into some bringing-up sections (20,21,22), wherein, each bringing-up section (20,21,22) can connect separately or disconnect.
6, according to the described equipment of claim 5, it is characterized in that bringing-up section (20,21,22) before and after flue gas stream (R) direction, arrange and passed successively from contrary direction by feedwater (S), wherein, each bringing-up section (20,21,22) in arrival end and adjusting device (15a, 15b, 15c) connection.
According to the described equipment of claim 6, it is characterized in that 7, each bringing-up section (20,21,22) all has an inlet gatherer (23,24 or 25) that is used for collecting feedwater (S) in the porch.
8, according to claim 6 or 7 described equipment, it is characterized in that at its port of export an adjuster (14) that is connected with an adjusting device (15) at least being arranged, its input quantity is the actual value of flue-gas temperature (Ti).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4218016.3 | 1992-06-01 | ||
| DE4218016A DE4218016A1 (en) | 1992-06-01 | 1992-06-01 | Method and device for controlling the flue gas temperature at the outlet of a steam generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1080040A true CN1080040A (en) | 1993-12-29 |
| CN1044403C CN1044403C (en) | 1999-07-28 |
Family
ID=6460138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93106571A Expired - Lifetime CN1044403C (en) | 1992-06-01 | 1993-05-28 | Method and apparatus for adjusting teperature of smoke at outlet of vapor generator |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0643816B2 (en) |
| JP (1) | JPH07503530A (en) |
| CN (1) | CN1044403C (en) |
| DE (2) | DE4218016A1 (en) |
| ES (1) | ES2094536T5 (en) |
| WO (1) | WO1993024790A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105339603A (en) * | 2013-06-18 | 2016-02-17 | 西门子公司 | Method and device for controlling the spraying of water into the flue gas duct of a gas and steam turbine installation |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK0745807T3 (en) * | 1995-05-31 | 2000-02-21 | Asea Brown Boveri | steam Generator |
| FI970438A0 (en) | 1996-12-19 | 1997-02-03 | Kvaerner Pulping Oy | Foerfarande i panna, saerskilt i sodapanna |
| DE10004187C5 (en) * | 2000-02-01 | 2013-06-06 | Siemens Aktiengesellschaft | Method for operating a gas and steam turbine plant and thereafter operating plant |
| US9297278B2 (en) | 2011-05-27 | 2016-03-29 | General Electric Company | Variable feedwater heater cycle |
| JP5995685B2 (en) * | 2012-11-27 | 2016-09-21 | クボタ環境サ−ビス株式会社 | Waste heat recovery equipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3040719A (en) * | 1952-04-21 | 1962-06-26 | Bailey Meter Co | Vapor generating and superheating systems |
| US3807364A (en) * | 1972-07-20 | 1974-04-30 | Westinghouse Electric Corp | Mixing header |
| JPS5836243B2 (en) * | 1979-12-15 | 1983-08-08 | 工業技術院長 | steam generator |
| DE3344712C1 (en) * | 1983-12-10 | 1985-04-18 | Balcke-Dürr AG, 4030 Ratingen | Steam generator |
| DK154731C (en) * | 1985-05-21 | 1989-05-08 | Burmeister & Wains Energi | Steam boiler with catalytic flue gas treatment as well as boiler operation |
| JP2592061B2 (en) * | 1986-06-02 | 1997-03-19 | バブコツク日立株式会社 | Waste heat recovery boiler |
| US4799461A (en) * | 1987-03-05 | 1989-01-24 | Babcock Hitachi Kabushiki Kaisha | Waste heat recovery boiler |
-
1992
- 1992-06-01 DE DE4218016A patent/DE4218016A1/en not_active Withdrawn
-
1993
- 1993-04-19 WO PCT/DE1993/000340 patent/WO1993024790A1/en active IP Right Grant
- 1993-04-19 EP EP93907804A patent/EP0643816B2/en not_active Expired - Lifetime
- 1993-04-19 JP JP6500067A patent/JPH07503530A/en active Pending
- 1993-04-19 ES ES93907804T patent/ES2094536T5/en not_active Expired - Lifetime
- 1993-04-19 DE DE59304208T patent/DE59304208D1/en not_active Expired - Lifetime
- 1993-05-28 CN CN93106571A patent/CN1044403C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105339603A (en) * | 2013-06-18 | 2016-02-17 | 西门子公司 | Method and device for controlling the spraying of water into the flue gas duct of a gas and steam turbine installation |
| CN105339603B (en) * | 2013-06-18 | 2016-12-14 | 西门子公司 | For regulating and controlling water to the equipment sprayed in the exhaust gases passes of steam and gas turbine facility and method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0643816A1 (en) | 1995-03-22 |
| EP0643816B1 (en) | 1996-10-16 |
| ES2094536T3 (en) | 1997-01-16 |
| CN1044403C (en) | 1999-07-28 |
| ES2094536T5 (en) | 2004-07-01 |
| WO1993024790A1 (en) | 1993-12-09 |
| DE4218016A1 (en) | 1993-12-02 |
| JPH07503530A (en) | 1995-04-13 |
| DE59304208D1 (en) | 1996-11-21 |
| EP0643816B2 (en) | 2003-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2294710C (en) | Waste heat steam generator | |
| CN109059290B (en) | Condensing type gas heating and bathing dual-purpose furnace and control method thereof | |
| RU2688078C2 (en) | Coaling welded electric installation with oxy-ignition with heat integrating | |
| RU2062332C1 (en) | Combined-cycle plant | |
| CN201028791Y (en) | Anti-corrosion energy-saving boiler flue gas residual heat utilization device | |
| CN1044403C (en) | Method and apparatus for adjusting teperature of smoke at outlet of vapor generator | |
| CN110726153A (en) | Coal-fired power plant flue gas whitening elimination system and method | |
| MXPA04006872A (en) | Feedwater heater. | |
| CN111795379A (en) | Circulating fluidized bed boiler for burning biomass | |
| CN104832903A (en) | Biomass particle boiler with compact arrangement, small capacity and large output | |
| CN213834530U (en) | Conversion device for water gas conversion reaction | |
| US5361827A (en) | Economizer system for vapor generation apparatus | |
| CN210319981U (en) | System for utilize boiler of thermal power plant to arrange heat energy and heat electric precipitation body in succession | |
| CN112283681A (en) | Angle tube boiler with tail quenching heating surface | |
| CN208312354U (en) | A kind of double reheat electricity generation system | |
| EP1122491B1 (en) | Heat recovery apparatus and method of minimising fouling in a heat recovery apparatus | |
| CN212456950U (en) | Air preheating system with coupled rotary preheater and tubular preheater | |
| CN114151778B (en) | Boiler structure without stopping furnace during overhaul and furnace stopping switching method | |
| RU2261338C1 (en) | Steam power plant with additional steam turbines | |
| CN217715009U (en) | Water pipe exhaust-heat boiler of adjustable export flue gas temperature | |
| CN114251664B (en) | Garbage incinerator and reheat flue gas reflux system thereof | |
| SU1339344A1 (en) | Device for recovering waste heat of effluent gases | |
| CN213930861U (en) | Angle tube boiler with tail quenching heating surface | |
| SU1149116A1 (en) | Method of two-step contact heating of water | |
| SU1163085A2 (en) | Boiler unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130528 Granted publication date: 19990728 |