CN85106257A - Resuperheat duplex matter mixed cycle power plant - Google Patents
Resuperheat duplex matter mixed cycle power plant Download PDFInfo
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- CN85106257A CN85106257A CN85106257.1A CN85106257A CN85106257A CN 85106257 A CN85106257 A CN 85106257A CN 85106257 A CN85106257 A CN 85106257A CN 85106257 A CN85106257 A CN 85106257A
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- steam
- resuperheat
- working medium
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- turbine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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Abstract
The present invention proposes a kind of new duplexing matter mixed cycle and power plant thereof, it is characterized in that before mixing pressure is higher and working medium---steam that temperature is lower, elder generation is independent expansion working in back pressure turbine or other transducers, and then with the common work done of another working medium combustion gas mixing, reach resuperheat by mixing, carry out the resuperheat second time after mixing in case of necessity, vacuumize by steam composition condensation in the working medium that the exhaust heat boiler behind the turbine is discharged and remaining combustion gas of cooling off again and reduce the turbine back pressure, increase enthalpy drop, solve the existing little problem of duplexing matter cyclic steam enthalpy drop, obtain higher efficient.
Description
The present invention relates to a kind of power plant, particularly a kind of power plant with the work of resuperheat duplex matter mixed cycle.
The characteristics of duplex matter mixed cycle are to have two kinds of working medium to mix the working procedure of work done, and the present mainly is the gas-vapo(u)r mixed cycle, has another name called steam turbine, and it lacks than gas-vapo(u)r combined cycle investment cost than gas turbine proficiency height.
The duplexing matter mixed cycle of prior art mainly is the steam that the steam generator from boiler or other patterns is come out, and direct and gas turbine mixes work done, expand near atmospheric pressure, and such circulation can be referred to as simple duplexing matter mixed cycle.This idea proposes over one hundred year, and last century Mo, Russia national treasury Si Mingsiji made overtesting.Since the fifties, along with the application of gas turbine, Russia and the U.S., day, in and I am in research.1976-1981, U.S. Cheng Dah Yu obtains the patent of four relevant these technology, and the patent No. is 3.978.661,4.128.994,4.128.996,4.265.713, and test." the Journal of Engineering For Gas Turbine and Power " in July, 1984 has special literary composition report.
Existing simple mixed cycle comprises the patent deficiency of Cheng, it is the restriction that the expansion ratio of steam is subjected to the gas turbine expansion ratio, the technical merit of gas turbine can't can reach high pressure like that to steam with air compression at present, and steam can obtain the potentiality of big enthalpy drop and fail to fill a part performance.
Purpose of the present invention just provides a kind of steam that can make and obtains big enthalpy drop, and with a kind of power plant that are different from the circulation-resuperheat duplex matter mixed cycle work of prior art, this device has higher efficient than prior art.
The common ground of the present invention and prior art is all to have duplexing matter to mix the process of work done, and the feature that is different from prior art is:
1. with the resuperheat periodic duty.
At first, temperature is lower and a kind of working medium (as steam) that pressure is higher, before two kinds of working medium are mixed, all earlier independent expansion working, two kinds of working medium are mixed then, and steam is by mixing and resuperheat with high-temperature fuel gas, and available so higher vapor pressure also utilizes the enthalpy drop of one section of high pressure, the exportable pressurized air that also can be used to of power, the pressure ratio of increase gas turbine.Transformation of energy can be passed through back pressure turbine, and rotation or reciprocal feed pump or pressure exchanger (as gas wave machine) are finished, and different schemes is arranged.
Also have,, satisfy the needs of certain steam output in order to improve the temperature of mixed working fluid in the exhaust heat boiler import, can be to carrying out resuperheat through the working medium of mixing; Steam is with double reheat, and combustion gas is with a resuperheat periodic duty.
2. improve enthalpy drop by reducing gas-turbine outlet back pressure, way is at the mixed working fluid exhaust outlet, with condenser to the steam composition condensation in the exhaust, water is recyclable like this, remainder is extracted out with vacuum pump through the combustion gas of supercooling, though vacuum pump is wanted consumed power, but working medium flow has reduced after the vapor condensation first, second combustion gas has been cooled to below 100 ℃, temperature far below working medium in the turbine, owing to the turbine back pressure reduces the power that increases, far surpass the power that vacuum pump consumes, the efficient of device is further enhanced.
The present further describes structure of the present invention and principle in conjunction with the accompanying drawings.
Accompanying drawing 1 plant system drawing
Accompanying drawing 2 circulation IS figure
With reference to Fig. 1, from the mixed working fluid that gas turbine (1) comes out, enter in waste heat boiler (3) or the steam generator and reclaim heat, generating steam. Feedwater is through water treatment facilities (5), squeeze into boiler with feed pump (4), through feed water preheater, the superheated steam that evaporating heating surface and superheater produce, all deliver to (the energy converter back pressure turbine of high-power device of work done in the energy converter, the small-power device is with rotation or piston steam engine, by further exploitation high or low power available wave pressure supercharger all). Steam expansion is to a little more than the pressure of combustion chamber (pressure reduction enough overcomes resistance and is degree), spray into combustion chamber or turbine before. For the scheme with pressure exchanger (such as gas wave machine), then steam can be led in the gas wave machine, make the supercharging air of blower outlet, then burning and vapor mixing.
Spray into the part in the steam of combustion chamber, through the ejection of fuel nozzle outer shroud, can improve the fuel atomization quality, reduce pollutant HOXForm, mixed working fluid is work done in gas turbine.
The mixed working fluid of turbine outlet enters waste heat boiler, can be referred to as first kind of resuperheat circulation in the atmosphere if the mixed working fluid of boiler export is discharged to, and structure is simpler. If be discharged in the condenser, the present is called the circulation of second resuperheat; Efficient further improves, and can carry out again resuperheat, to satisfy the needs of rational steam raising amount.
Because the steam content ratio is little in the mixed working fluid, generally less than 15% of total working medium, emit the heat of latent heat during the condensation of Unit Weight working medium than pure steam much less, and condensate water is advanced boiler again and must be processed, the direct contact condenser of therefore having ready conditions and adopting working medium and cooling water directly to contact needn't be used expensive tubulation hot side formula condenser. Direct contact condenser can be used the sprinkle formula, injection type, or the pattern of other particular design. The combustion gas of remainder is extracted in the atmosphere with vavuum pump behind the steam-condensation. Vavuum pump is selected according to unit capacity and vacuum, and high-power with roots-type or vane type, small-power can be used slide type.
Because turbine-exit temperature reduces with the increase of expansion ratio, in order to improve turbine delivery outlet temperature, increase the steam raising amount and the resuperheat second time that carries out, should in the middle of expansion process, carry out, the available after-burner that is arranged in before the power turbine is finished; Also can extract at the suitable point of pressure the air of compressor out, after a combustion chambers burn of adding, mix to realize with the mixed working fluid in somewhere in the expansion process.
The principle of this device and characteristics illustrate that by thermal technology's circular chart 2 left side is combustion gas IS figure, and the right is steam IS figure.
Abcd is the circulation of general gas turbine, a part of dd ' f ' f=Q in the heat extraction among the left figureS1The heat of passing to steam and water by waste heat boiler, ee ' b ' b=Q among the figureS2By the heat of mixed process to the steam resuperheat.
Q
S1+ Q
S2The total amount of heat of water and steam is passed to in=combustion gas.With the resuperheat vapor recycle of these heats compositions as right figure, with area (1-2-3-4-5-6-7-8-1) expression, but vapor recycle heat extraction Q
S3A part of Q of=(1-9-8-8 '-1 ')
S4Also reclaim in boiler=(8-8 '-14 '-14).The heating Qin=Q of vapor recycle
S1+ Q
S2-Q
S4, the heat extraction Qout=Q of vapor recycle
S3-Q
S4
The present invention and existing simple mixed cycle are relatively, when parameter was identical before mixing, the steam of simple mixed cycle was partly with (2-3-4-5-6-2) expression, when heat extraction is identical, the present invention is a many area (2-3-4-5-6-2), steam efficient has partly obviously improved.
When condensation was bled, heat extraction process 8-9-1 was to moving down, heat extraction reduce and effectively merit increase, the efficient of vapor portion further improves, and combustion gas circuit heat extraction line is also to moving down, efficient also increases.
Usually, duplexing matter circulation is all represented with two circuit IS figure.Because two kinds of working medium flow differences can not reflect whole technical-economic index like this.The present invention proposes a kind of method, can be unified in two circulations on the IS figure of combustion gas, with an equivalent cyclic representation: the heat extraction of vapor recycle is the part that the steam total amount of heat is passed in combustion gas, can on combustion gas IS figure, show, be rll ' r ', this piece area can be calculated in proportion according to the efficient of vapor recycle and the area on the combustion gas figure, establishes η
S=steam partly efficient because
η
S=1-(heat extraction of vapor recycle)/(heating of vapor recycle)=1-(QS3-QS4)/(QS1+QS2-QS4)
Q
S3-Q
S4=rll ' r is on combustion gas IS figure
Q
S1, Q
S2, area as above-mentioned, Q
S4Area can be calculated in proportion, and area rll ' r ' just can calculate and obtain r, the position that l at 2.Though be virtual, the effective merit of circuit can be described at these 2; Aclrfa is the duplexing matter mixed cycle of equivalent, obviously η
SHigh more, the rl line is more to moving down; Be that steam part efficient is high more, the circuit total efficiency is also high more.
For the circulation of resuperheat once more after mixing, 10-11 is the resuperheat process second time on the steam IS figure, and the area of vapor recycle is (1-3-4-5-6-7-10-11-12-13-1), effectively merit; Heat extraction and the heat that reclaims from vapor portion have all improved, and be also right on the IS figure of combustion gas.If
Q
S3=circulation adds heat for the second time, then
Circulation always adds heat=Q
S1+ Q
S2+ Q
S3-Q
S4, for the purpose of directly perceived, the effective merit gmnd that increases and heat extraction nn ' d ' d are moved on to figure the right in proportion.Order
ijkp＝gmnd，
kk′p′p＝nn′d′d，
Like this, the position of heat extraction line rs can by
η
S=1-(rss ' r)/(Q
S 1+ Q
S 2+ Q
S5-Q
S4) obtain η
SHigh more, the rs line is more to moving down, and overall efficiency is high more, and effectively merit is also big more.Acijsrfea is the equivalent circulation of double reheat.
This circulation is compared with existing simple duplexing matter mixed cycle, and following advantage is arranged.
1. the steam enthalpy drop is made full use of.The steam of available elevated pressures, when gas turbine turbine inlet temperature pressure was identical, the existing duplexing matter circulation of thermal efficiency ratio significantly improved, and improves more than simple gas turbine.Modern gas turbine to three kinds of different models is used for different circuit power plant, and the operating point optimum efficiency of calculating through optimizing sees Table 1.(heating power of gas-vapo(u)r mixed working fluid calculate with through research and development than exact method).
See that from table 1 the old-fashioned gas turbine lower to efficient improves more with unit efficiency of the present invention.Like this, out-of-date old-fashioned unit still can effectively utilize, and can obtain very big economic benefit.
2. the also corresponding increase of power of sending with apparatus of the present invention.
3. with the resuperheat mixed cycle that has condensation to bleed, water can reclaim, but using water wisely.
This circulation relatively has following advantage with the gas-vapo(u)r combined cycle:
1. steam be by can obtaining the unapproachable high temperature of superheater with combustion gas mixing, and need not resuperheater and obtain the effect of resuperheat.After combustion gas and the vapor mixing, the specific heat and the enthalpy drop of working medium all increase; Simultaneously the component efficiencies of gas turbine is also than the steam turbine height, the resuperheat mixed cycle power plant that have condensation to bleed, and efficient has surpassed combined circulation power apparatus.
2. the used back pressure turbine condensing steam turbine progression more used than combined cycle lacks, and cost is also much lower.
Though 3. also use condenser, usefulness be direct contact condenser, cost is more much lower than tubulation hot side formula, and can save a large amount of non-ferrous metals.
4. mixed steam is oozed in the firing chamber, can reduce the formation of pollutant.
The present invention can be used for burning the occasion of gas or liquid fuel at present; Can be used for the oil field in China, gas field is with the boats and ships of oil, communications and transportation such as locomotive, with and the chemical industry of gaseous fuel arranged, metallurgical industry is from now on along with the burning of coal slurry water, gasification, boiling furnace, the research and development of pottery gas turbine and ceramic wear-resistant coating, the present invention just can make fuel by coal, and will be arranged development prospect widely.
Claims (5)
1, with the power plant of resuperheat duplex matter mixed cycle work, with the common ground of existing duplexing matter cycle power device be all to have two kinds of working medium to mix the process of work done, gas turbine [1] is all arranged, boiler [3], feed water pump [4], water-treating equipment component parts such as [5], but thermal technology of the present invention circulation is unlike the prior art, equipment also increases, and it is characterized in that
A, temperature is lower and pressure is higher that a kind of working medium--as steam is with the resuperheat periodic duty, the all earlier independent expansion working of steam before two kinds of working medium are mixed, expand into a little more than another working medium--the pressure of combustion gas, mix work done then, therefore increase the enegrgy converter of a single working medium work done, form first kind of resuperheat mixed cycle power plant.
B, by to the steam composition condensation in the exhaust and the combustion gas through supercooling vacuumizes to remainder, reduce gas whirlpool delivery outlet back pressure and increase enthalpy drop, increase steam output in order to improve boiler inlet working medium temperature, can be to mixed working medium resuperheat once more, therefore remove the component parts that a) item is arranged, also increase condenser [6], vacuum pump [7], or increase a tail pipe burner [8] again, form second kind of resuperheat mixed cycle power plant.
2, according to claim 1, enegrgy converter for single working medium expansion working before mixing, it is characterized in that the exportable gas compressor or the supercharging air that also can be used for gas turbine of its power, its pattern can be the back pressure type steam turbine, reciprocating type or rotary steam engine, pressure exchanger (as gas wave machine) or other enegrgy converters are looked unit capacity and requirement and different.
3, as requested 1, for the condenser that the condensing steam composition is used, it is characterized in that the available cheap condenser that directly contacts with cooling water and mixed working fluid, comprise the sprinkle formula, the pattern of injection type and particular design.
4, as requested 1, feature is to extract remaining combustion gas vacuum pump behind the vapor condensation out, and its pattern can use roots-type, blade type, and slide board type or other patterns, according to flow, the big or small selection of pressure ratio.
5, on request 1, be the temperature of mixed working fluid before the increase boiler, can the mixed working fluid resuperheat be is characterized in that by the afterburning or the decomposite way of burning of bleeding, afterburning carries out in tail pipe burner, tail pipe burner be arranged in before the power turbine or inflation process in the middle of more suitable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106257A CN1013291B (en) | 1985-08-10 | 1985-08-10 | Double medium intermediate-heating mixed circulation turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106257A CN1013291B (en) | 1985-08-10 | 1985-08-10 | Double medium intermediate-heating mixed circulation turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85106257A true CN85106257A (en) | 1987-02-25 |
| CN1013291B CN1013291B (en) | 1991-07-24 |
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ID=4794974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85106257A Expired CN1013291B (en) | 1985-08-10 | 1985-08-10 | Double medium intermediate-heating mixed circulation turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013291B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373164A (en) * | 2014-11-05 | 2015-02-25 | 中国华能集团清洁能源技术研究院有限公司 | Integrated gasification combined cycle (IGCC) power station system with complementary combustion type waste heat boiler and operating method |
| CN109826706A (en) * | 2019-01-24 | 2019-05-31 | 四川旭虹光电科技有限公司 | A kind of pair of oxygen-containing gas carries out the device of heating pressurized treatment |
-
1985
- 1985-08-10 CN CN85106257A patent/CN1013291B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373164A (en) * | 2014-11-05 | 2015-02-25 | 中国华能集团清洁能源技术研究院有限公司 | Integrated gasification combined cycle (IGCC) power station system with complementary combustion type waste heat boiler and operating method |
| CN109826706A (en) * | 2019-01-24 | 2019-05-31 | 四川旭虹光电科技有限公司 | A kind of pair of oxygen-containing gas carries out the device of heating pressurized treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1013291B (en) | 1991-07-24 |
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