Background technique
Gas turbine is that the gas with continuous-flow is that working medium drives the turbine high speed rotating, converts the chemical energy of fuel the internal combustion type dynamic power machine of kinetic energy into, is the wheeled heat engine of a kind of pivoting leaf.
Usually; Gas turbine comprises gas compressor, burner, firing chamber and turbo machine; Gas compressor is pressurized gas with air compression, and pressurized gas form fuel-air mixture with fuel mix in burner, through the ignition device after-combustion; The high temperature and high pressure gas that fuel combustion generates drives the turbo machine rotation, and the turbo machine rotation drives the generator set generating.
Gas turbine in the course of the work, fuel combustion in the firing chamber produces very high heat, therefore must implement cooling to the firing chamber, cause to prevent firing chamber Yin Gaowen damaging.
Existing firing chamber cooling means is air-cooled, and its concrete grammar is, the pressurized gas part that gas compressor pumps is used for and the fuel mix burning, and a part is used to blow to the firing chamber, takes away the part heat of firing chamber, realizes the cooling to the firing chamber.In practical application; In the pressurized gas that gas compressor pumps, there are 25%-40% and fuel mix to form fuel-air mixture and burning, have the pressurized gas of 60%-75% between the outer wall of firing chamber, to flow through; Outer wall to the firing chamber cools off; Get into firing chamber and high-temperature high-pressure fuel gas blending then, fuel gas temperature is reduced, reach 650 ℃-1000 ℃ of turbine rotor requirement.
Can find out, in the existing technology, the 60%-75% pressurized gas cooling combustion chamber of pumping through gas compressor, thereby need bigger energy be used for the cooling of firing chamber, thereby waste energy.
In addition,, adopt the cooling effect of air-cooled mode cooling combustion chamber relatively poor, cause the damage of firing chamber easily because the specific heat of air is less.
In addition, the sensible heat from the flue gas that turbo machine is discharged does not utilize fully, and most of fume emission causes the waste of the energy and the pollution of environment in air.
The model utility content
The utility model provides a kind of combustion gas and steam turbine system, in order to solving defective of the prior art, can energy saving, and reduce environmental pollution.
The utility model provides a kind of combustion gas and steam turbine system, comprises gas turbine, steam turbine, superheater, waste heat boiler and drum;
Said gas turbine comprises gas compressor, firing chamber and the turbo machine that is communicated with successively;
The outer wall of said firing chamber has water cooled furnace wall, has the cooling water that circulates in the said water cooled furnace wall, cools off said firing chamber;
Said superheater and waste heat boiler are installed on the fume emission pipeline of said turbo machine successively; Said superheater is communicated with said drum; Receive the saturated vapour in the said drum, said superheater is communicated with said steam turbine, for said steam turbine provides superheated vapor; Said waste heat boiler is communicated with said drum, constitutes the circulation loop.
For the conserve water resource, this combustion gas and steam turbine system also comprise condenser, purifier and the high-pressure water pump that is communicated with successively; Said condenser is communicated with said steam turbine, and said high-pressure water pump is communicated with said water cooled furnace wall, and said water cooled furnace wall is communicated with said drum, forms the circulation loop.
In order to reduce the pollution of flue gas to atmosphere environment, this combustion gas and steam turbine system also comprise pressure blower; Said pressure blower is communicated with said fume emission pipeline, and in the rear end that is installed in said waste heat boiler, this pressure blower is communicated with said gas compressor, and flue gas is flowed to said gas compressor.
In addition, this combustion gas and steam turbine system also comprise water collector; Said water collector is installed on the fume emission pipeline, and in the rear end that is installed in said waste heat boiler, this water collector is communicated with said purifier, with the vapor condensation in the flue gas and flow to said purifier.Can be to the water vapor recycle in the flue gas, conserve water resource.
On the basis of technique scheme, said firing chamber all has a burner at least two firing chambers independently in each firing chamber, and the outer wall of each firing chamber all is equipped with water cooled furnace wall.
On the basis of technique scheme, said firing chamber is one, has at least two burners in the said firing chamber.
Combustion gas that the utility model provides and steam turbine system, compared with prior art, the outer wall of said firing chamber has water cooled furnace wall, has the cooling water that circulates in the said water cooled furnace wall, cools off said firing chamber.Cooling water in the water cooled furnace wall is better to the cooling effect of firing chamber, can reduce the air quantity that said gas compressor is imported said firing chamber, and then can energy saving.
And owing on the fume emission pipeline of said turbo machine, superheater and waste heat boiler are installed successively, said superheater is communicated with said steam turbine, drives the steam turbine generating for said steam turbine provides superheated vapor, can improve energy utilization ratio.
Embodiment
For the purpose, technological scheme and the advantage that make the utility model embodiment clearer; To combine the accompanying drawing among the utility model embodiment below; Technological scheme among the utility model embodiment is carried out clear, intactly description; Obviously, described embodiment is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Need to prove that at first the connecting line between the parts among the accompanying drawing 1-2 representes that pipeline is communicated with, wherein the direction indication of arrow is the flow direction of working medium.
With reference to Fig. 1, the combustion gas that Fig. 1 provides for the utility model first embodiment and the schematic representation of steam turbine system.
In first embodiment of the utility model, combustion gas that the utility model provides and steam turbine system comprise gas turbine, steam turbine 7, superheater 4, waste heat boiler 5 and drum 6.Wherein, gas turbine comprises gas compressor 1, firing chamber 2 and the turbo machine 3 that is communicated with successively.
The outer wall of firing chamber 2 has water cooled furnace wall 21, has the cooling water that circulates, cooling combustion chamber 2 in the water cooled furnace wall 21.
Superheater 4 is installed on the fume emission pipeline of turbo machine 3 with waste heat boiler 5 successively; Flue gas heating superheater 4 and waste heat boiler 5 through turbo machine 3 discharges; Superheater 4 is communicated with drum 6, and the saturated vapour in the drum 6 gets into superheater 4 through pipeline, and superheater 4 is communicated with steam turbine 7; For steam turbine 7 provides superheated vapor, and then the blade of promotion steam turbine 7 runs up; Waste heat boiler 5 is communicated with drum 6, constitutes the circulation loop, and waste heat boiler 5 adds the circulation water generates steam in the type of thermal communication loop.
In addition, the combustion gas that provides of present embodiment and steam turbine system also comprise condenser 8, purifier 9 and the high-pressure water pump 10 that is communicated with successively; Condenser 8 is communicated with steam turbine 7, and high-pressure water pump 10 is communicated with water cooled furnace wall 21, and water cooled furnace wall 21 is communicated with drum 6, forms the circulation loop.
Particularly; Firing chamber 2 has two independently firing chambers, all has a burner 22 in each firing chamber, and the outer wall of each firing chamber 2 all is equipped with water cooled furnace wall 21; The water cooled furnace wall 21 of each firing chamber all is communicated with a high-pressure water pump 10, and all is communicated with drum 6.
In addition, in the present embodiment, turbo machine 3 is coaxially connected with first generator set 13, and turbo machine 3 high-speed rotation drive 13 generatings of first generator set.Steam turbine 7 is coaxially connected with second generator set 14, and steam turbine 7 high-speed rotation drive 14 generatings of second generator set.
Specify the combustion gas that the utility model first embodiment provides and the working procedure and the working medium cyclic process of steam turbine system below:
One, gas compressor 1 sucks air and continuously with its compression; Air after the compression is flowed to the burner 22 in the firing chamber 2; Simultaneously fuel is flowed to the burner 22 in the firing chamber 2, fuel fully mixes 2 internal combustion in the firing chamber afterwards with air, produces the flue gas of HTHP.
Two, 2 air outlet flows to turbo machine 3 to the flue gas of the HTHP in the firing chamber 2 from the firing chamber, drive turbo machine 3 and run up, and then driving is generated electricity with turbo machine 3 coaxial first generator set 13 that are connected.
Three, waste heat boiler 5 absorbs the heat of the flue gas of turbo machine 3 discharges; Heat its inner circulating water and produce steam water interface; Get into drum 6 through pipeline, steam water interface separates into saturated vapour and hot water in drum 6, and hot water is back to through pipeline and continues heating in the waste heat boiler 5.
Four, saturated vapour gets into superheater 4 through pipeline; Superheater 4 absorbs the heat of the flue gas of turbo machine 3 eliminatings; Saturated vapour is added the thermosetting superheated vapor; Superheated vapor gets into the blade rotation that steam turbine 7 promotes steam turbine 7 through pipeline, and steam turbine 7 drives second generator set, 14 generatings of coaxial connection.
Five, the steam that comes out from steam turbine 7 gets into condenser 8 through pipeline; Condenser 8 forms condensed water with steam cooling; Condensed water gets into purifier 9 through pipeline, and purifier 9 purifies the water deoxygenation of inside, cooling water is pumped in the water cooled furnace wall 21 of firing chamber 2 through high-pressure water pump 10; Cooling water circulates in water cooled furnace wall 21, cooling combustion chamber 2.
Six, the heat of the cooling water absorption firing chamber 2 in the water cooled furnace wall 21 becomes steam water interface, gets into drum 6 through pipeline, in drum 6, separates into saturated vapour and hot water, continues above-mentioned circulation.
Combustion gas that present embodiment provides and steam turbine system, the outer wall of firing chamber 2 has water cooled furnace wall 21, has the cooling water that circulates, cooling combustion chamber 2 in the water cooled furnace wall 21.Compared with prior art, the cooling water in the water cooled furnace wall 21 is better to the cooling effect of firing chamber 2, can reduce the air quantity of gas compressor 1 input firing chamber 2, and then can energy saving.
And because superheater 4 and waste heat boiler 5 are installed on the fume emission pipeline of turbo machine 3 successively, superheater 4 is communicated with steam turbine 7, drives steam turbine 7 generatings for steam turbine 7 provides superheated vapor, can improve energy utilization ratio.
With reference to figure 2, the combustion gas that Fig. 2 provides for the utility model second embodiment and the schematic representation of steam turbine system.
In a second embodiment, the combustion gas among the combustion gas that the utility model provides and the structure of steam turbine system and first embodiment and the structure of steam turbine system are basic identical, and difference is described below:
Combustion gas that present embodiment provides and steam turbine system also comprise pressure blower 11.
Pressure blower 11 is communicated with the fume emission pipeline, and in the rear end that is installed in waste heat boiler 5, and pressure blower 11 is communicated with gas compressor 1, and flue gas is flowed to gas compressor 1, can reduce the pollution of flue gas to atmosphere environment.
In addition, the combustion gas and the steam turbine system that provide of present embodiment also comprises water collector 12.Water collector 12 is installed on the fume emission pipeline, and in the rear end that is installed in waste heat boiler 5, this water collector 12 is communicated with purifier 9, with the vapor condensation in the flue gas and flow to purifier 9, can realize the recycle of steam, the conserve water resource.
Obviously, combustion gas in the present embodiment and steam turbine system also have combustion gas and the technique effect of steam turbine system among above-mentioned first kind of embodiment, repeat no more at this.
With reference to figure 3, the combustion gas that Fig. 3 provides for the utility model the 3rd embodiment and the schematic representation of steam turbine system.
In the 3rd embodiment, the combustion gas among the combustion gas that the utility model provides and the structure of steam turbine system and the first kind of embodiment and the structure of steam turbine system are basic identical, and difference is described below:
Firing chamber 2 is one, has at least two burners 22 in the firing chamber 2.
In addition, the quantity of the burner 22 in the firing chamber 2 can we can say that also the concrete structure of combustion gas that the utility model provides and the firing chamber of steam turbine system 2 can be done multiple improvement, no longer all illustrates at this for one.
Obviously, combustion gas in the present embodiment and steam turbine system also have combustion gas and the technique effect of steam turbine system among above-mentioned first kind of embodiment, also repeat no more at this.
What should explain at last is: above embodiment is only in order to the technological scheme of explanation the utility model, but not to its restriction; Although the utility model has been carried out detailed explanation with reference to previous embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of each embodiment's technological scheme of essence disengaging the utility model of relevant art scheme.