CN100455781C

CN100455781C - Wet compression-rear surface cooling-regenerative cycle combustion turbine

Info

Publication number: CN100455781C
Application number: CNB2007100724249A
Authority: CN
Inventors: 徐立民
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2007-06-29
Filing date: 2007-06-29
Publication date: 2009-01-28
Anticipated expiration: 2027-06-29
Also published as: CN101078370A

Abstract

The invention provides a wet-compression back-surface-cooling regenerative gas turbine, comprising wet-compression compressor, back-surface-cooling machine, combustor, turbine and regenerator. Adding ports of water drop frog are set at the inlet of compressor and the middle. In compressing flow of gas cycling working fluid, water drop is mixed with gas cycling working fluid and absorbs heat energy to be vaporized. Back-surface-cooling machine, regenerator and combustor are connected in series between the outlet of compressor and the turbine. The Cycling working fluid out of compressor passes through the back-surface-cooling machine, the low-temperature side of regenerator, the combustor, the turbine and the high-temperature side of regenerator in turn. Finally it is discharged into air. Condensed precipitation water of back-surface-cooling machine is used as water of water drop frog to enter into the compressor after it passes through water treatment device. Under conditions of the same turbine inlet temperature, the same compressor pressure ratio and the same part efficiency, the heat efficiency of invention can be improved by about 29%-35% compared with the heat efficiency of simple cycling gas turbine and it can be improved by about 26%-33% in output power index of specific air output compared with the simple cycling gas turbine.

Description

Wet compression-rear surface cooling-regenerative cycle combustion turbine

One, technical field

What the present invention relates to is a kind of gas turbine.A kind of circulatory system of gas turbine specifically.

Two, background technique

Gas turbine can be divided into simple cycle and complex loops.Simple cycle gas turbine engine has this three major types critical piece of gas compressor, firing chamber and turbine, for improving its cycle efficiency, needs to improve turbine inlet temperature, gas compressor pressure ratio and component efficiencies.Complex-cycle gas turbine is to have increased miscellaneous part on the simple cycle basis, and the thermal procession of cycle fluid has had qualitative change, can raise the efficiency under the constant condition of loop parameters such as turbine inlet temperature, performance such as power.Simple cycle and complex-cycle gas turbine respectively have pluses and minuses, the development of since gas turbine is born, always having vied each other, and performance is improved constantly.

Three, summary of the invention

The object of the present invention is to provide a kind of wet compression-rear surface cooling-regenerative cycle combustion turbine that can further improve the efficient of gas turbine.

The object of the present invention is achieved like this: it comprises the Wet Compression gas compressor, the rear surface cooling device, the firing chamber, turbine, regenerator, be provided with the water droplet mist in the import of gas compressor and neutral position and add inlet, in the compression process of gas circulation working medium, water droplet mixes with gas circulation working medium and the evaporation of absorbing heat, between the outlet of gas compressor and turbine, be in series with the rear surface cooling device, regenerator and firing chamber, the cycle fluid that goes out gas compressor passes through the rear surface cooling device successively, the regenerator low temperature side, the firing chamber, turbine, the regenerator high temperature side, enter atmosphere at last, cycle fluid condensation in the rear surface cooling device is separated out water and enter gas compressor as water droplet mist water behind water processor, and the cycle fluid that goes out the regenerator low temperature side enters in the firing chamber.

The invention belongs to complex-cycle gas turbine, although the existing complex loops unit and the technological scheme thermal efficiency than higher, technological scheme of the present invention is a complex-cycle gas turbine that efficient is higher, technology is more advanced.The present invention is with simple cycle gas turbine engine and three major types critical piece technology thereof, backheat technology, wet compression technology, the organic integration of surface heat exchanging technology, form wet compression-rear surface cooling-regenerative cycle combustion turbine, effect has significantly surmounted the independent use and the existing scheme that is used in combination of original technology.

Wet compression-rear surface cooling-regenerative cycle combustion turbine of the present invention, under turbine inlet temperature, gas compressor pressure ratio and component efficiencies the same terms, comparable simple cycle gas turbine engine improves about 29%-35% aspect thermal efficiency index, improve about 26%-33% aspect the output power index of unit air mass flow; Under the equal conditions, cold/steam-recycling (S-S) is lower than Wet Compression-rear surface cooling-backheat circulation at the increase rate aspect the thermal efficiency index in the complex loops of prior art---steam-recycling (STIG), a cold backheat (ICR), the water spray.In addition, as featured function, the recycling gas compressor rear surface cooling of Wet Compression-rear surface cooling-backheat device condensation recycle-water has easily been realized recycling of water in open cycle.

The thermodynamic cycle scheme of wet compression-rear surface cooling-regenerative cycle combustion turbine of the present invention is: from cycle fluid compression process initial point, 1) Wet Compression: main body cycle fluid (air, the helium etc.) gas compressor of flowing through boosts, simultaneously, add the water droplet mist at the flow process starting point, replenish on stream in case of necessity and add the water droplet mist, make the evaporation of water droplet longshore current journey, play cooling effect, the flow process terminal is the mixture of water vapor and main body cycle fluid; 2) rear surface cooling: the flow through surface cooler of gas compressor back of main body cycle fluid after boosting and water vapor, temperature reduces, and the moisture of adding is separated out in condensation; 3) regenerator low temperature side flow process: in regenerator, increase temperature by surface heat exchanging with high temperature side gas; 4) burning heats up: the heat that absorbs high temperature heat source in the firing chamber; 5) acting of expanding: the acting of in turbine, expanding of High Temperature High Pressure cycle fluid, decrease temperature and pressure; 6) regenerator high temperature side flow process: turbine outlet has the cycle fluid of waste heat and by surface heat exchanging heat is passed to low temperature side gas in regenerator; 7) to the low temperature cold source heat release: cycle fluid comes back to the compression process initial point of normal temperature first pressing to the low temperature cold source heat release.

Theoretical foundation and principle that wet compression-rear surface cooling-regenerative cycle combustion turbine of the present invention improves the power and the thermal efficiency are: the water-drop evaporation that sprays in the gas compressor, reduced the working medium temperature, thereby power input to compressor is reduced, the output power of unit is increased; Compressor delivery temperature is lower than turbine-exit temperature, it is the condition that reclaims the turbine exhaust waste heat, make full use of Wet Compression cooling and rear surface cooling cooling characteristics, set up regenerator, significantly reclaim exhaust heat, the gas temperature that enters the firing chamber is raise, fuel consumption is reduced, thereby output power increases the increase of the thermal efficiency just when accomplishing equal fuel consumption.

With similar comparison, wet compression-rear surface cooling-regenerative cycle combustion turbine performance of the present invention can access the reason that improves by a relatively large margin and be: the Wet Compression good cooling results, more approach isothermal compression, and make power of the assembling unit increasing degree big; Gas compressor rear surface cooler makes the blower outlet gas temperature continue to reduce, and backheat is doubled.

Four, description of drawings

Accompanying drawing is the structural representation of the specific embodiment of the present invention.

Five, embodiment

For a more detailed description to the present invention for example below in conjunction with accompanying drawing:

In conjunction with the accompanying drawings, the composition of wet compression-rear surface cooling-regenerative cycle combustion turbine comprises the Wet Compression gas compressor, the rear surface cooling device, the firing chamber, turbine, regenerator, be provided with the water droplet mist in the import of gas compressor and neutral position and add inlet, in the compression process of gas circulation working medium, water droplet mixes with gas circulation working medium and the evaporation of absorbing heat, between the outlet of gas compressor and turbine, be in series with the rear surface cooling device, regenerator and firing chamber, the cycle fluid that goes out gas compressor passes through the rear surface cooling device successively, the regenerator low temperature side, the firing chamber, turbine, the regenerator high temperature side, enter atmosphere at last, the cycle fluid condensation in the rear surface cooling device is separated out water and is entered gas compressor through behind the water processor as water droplet mist water.

Claims

1, a kind of wet compression-rear surface cooling-regenerative cycle combustion turbine, it comprises Wet Compression gas compressor, rear surface cooling device, firing chamber, turbine, regenerator, it is characterized in that: the import of gas compressor and neutral position are provided with the water droplet mist and add inlet, in the compression process of gas circulation working medium, water droplet mixes with gas circulation working medium and the evaporation of absorbing heat; The outlet of gas compressor is provided with surface heat exchanging formula rear surface cooling device and regenerator, and the cycle fluid that goes out gas compressor enters the rear surface cooling device, and the cycle fluid that goes out the rear surface cooling device enters the regenerator low temperature side, and the regenerator high temperature side passes to turbine outlet gas; The cycle fluid condensation of rear surface cooling device is separated out water and enter gas compressor as water droplet mist water behind water processor, and the cycle fluid that goes out the regenerator low temperature side enters in the firing chamber.