CN1167518A - Method and equipment for generating additional energy in a power plant - Google Patents

Method and equipment for generating additional energy in a power plant Download PDF

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Publication number
CN1167518A
CN1167518A CN96190720A CN96190720A CN1167518A CN 1167518 A CN1167518 A CN 1167518A CN 96190720 A CN96190720 A CN 96190720A CN 96190720 A CN96190720 A CN 96190720A CN 1167518 A CN1167518 A CN 1167518A
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CN
China
Prior art keywords
flue gas
equipment
additional fuel
cooling medium
power equipment
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.)
Pending
Application number
CN96190720A
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Chinese (zh)
Inventor
C·J·沙特林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Power Carbon AB
Original Assignee
ABB Carbon AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ABB Carbon AB filed Critical ABB Carbon AB
Publication of CN1167518A publication Critical patent/CN1167518A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
    • F02K3/08—Plants including a gas turbine driving a compressor or a ducted fan with supplementary heating of the working fluid; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/30—Adding water, steam or other fluids for influencing combustion, e.g. to obtain cleaner exhaust gases
    • 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
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/061—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with combustion in a fluidised bed
    • F01K23/062—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with combustion in a fluidised bed the combustion bed being pressurised
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/205—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products in a fluidised-bed combustor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/16—Fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures, e.g. by the arrangement of the combustion chamber and its auxiliary systems inside a pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/002—Supplying water

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

A device for generating additional energy in a power plant having a combustor (1) with a bed (4), to which air and fuel are intended to be supplied for combustion of the fuel therein while forming hot flue gases over the bed, and a gas turbine driven by these flue gases for generating energy, comprises means (21) arranged to supply additional fuel in the path (22) of said flue gases between said bed and the gas turbine for utilising excess oxygen available in the flue gases for combustion of this fuel there and members (23) arranged to supply a cooling medium to the flue gases in connection with said supply of additional fuel to the flue gas path for regulating the temperature of the flue gases to a desired level.

Description

In power equipment, produce the method and apparatus of additional-energy
Invention field and prior art
The present invention relates to a kind of method and apparatus that in the power equipment of firing chamber, produces additional-energy with bed, wherein above this, form in the hot flue gas to this air supply and fuel carrying out fuel combustion, and gas turbine is driven by these energy-producing flue gases.
Present invention resides in the method that generates additional-energy in the various power equipments with these features, in fact heat energy is almost always drawn from this by heat exchanger, for example, by carrying out heat exchange with one group of pipe fitting that is embedded in this so that produce steam and this group pipe fitting as a kind of good heat conductor, but the present invention limits self by any way.This bed can take on a different character, but, hereinafter will be described in the situation of generation additional-energy in the power equipment with fluidized bed and be embedded in the one group of pipe fitting that is used to produce the required steam of steam turbine in the fluidized bed in order to explain rather than limit by any way restriction of the present invention.
Energy except the conventional operation by equipment produces can also produce additional energy sometimes in this power equipment, this is very big superiority.For example, when needs produced additional-energy, the energy that hope can be exported equipment in existing this power equipment increased to maximum value.And the method for utilizing this generation additional-energy is feasible, if exist from operation at part load begin and increase sharply the load demand the time can make power equipment increase load quickly.Yet, the method for this generation additional-energy is introduced this power equipment can exist difficulty, because this can bring various problem, as problem such as stopping up, local temperature is too high.In addition, some power equipments energy of limiting its generation usually is higher than the energy that equipment is produced when running at full capacity.Example as discussed in this case, the vapor wheel pusher side can be subjected to power equipment to produce the restriction of how many energy.
Brief summary of the invention
The method and apparatus that the purpose of this invention is to provide the sort of type defined in a kind of preface, they can produce additional energy in this power equipment, so that satisfy the demand.
This purpose of the present invention is that the method and apparatus that is limited by independent claims is realized, wherein, this equipment comprises and is used in the described flue gas channel between described bed and gas turbine feeding additional fuel so that utilize residue oxygen available in the flue gas to carry out the device of fuel combustion at this, and is used for providing cooling medium so that flue-gas temperature is adjusted to the assembly of a desirable level in flue gas with feeding additional fuel in the flue gas channel in the same way.
Like this, the additional-energy of indication can infeed the residue oxygen that the additional fuel in the described flue gas channel burns by utilizing the making in the hot flue gas channel that be present in that is produced by fluidized bed, and produces by making additional fuel contact to burn with the hot flue gas that wherein has oxygen.By described cooling medium is provided, the temperature of flue gas can maintain the level of a satisfaction simultaneously, and this mainly is for satisfying the requirement of gas turbine.The energy that this additional-energy that produces with this kind method will cause gas turbine to produce increases, this just means the maximum productivity that will not need to reach this equipment in power equipment when running at full capacity normally, can export the energy of increase by gas turbine, and increase the maximum total energy of this equipment thus.What can mention as an example is in the example of a power equipment with fluidized bed as discussed above, the oxygen content of leaving in the flue gas of described fluidized bed will be on the certain value at least, because must have high like this oxygen content to avoid in the fluidized bed part, for example be close to fluidized bed input fuel place, cause the anoxia phenomenon of adverse effect, it can cause increase of power drop and SOx etc.Also will be enough to make to have lower oxygen content in the flue gas channel on the other hand,, this means that a large amount of oxygen can be used for the burning of flue gas channel to avoid as variety of issues such as corrosion.
The required load increase from a sub load to another sub load or from a sub load to fully loaded also can be quickened by equipment of the present invention.Keep constant (this situation often occurring) if flow to the volume of the gas turbine of the power equipment that is equipped with present device, promptly will account for the part of flue gas flow by the gas that burning produced (being generally water vapor) of additional fuel in the described flue gas channel, this means that the pure air stream that arrives pressurized container will increase, therefore the air stream that arrives fluidized bed will have minimizing slightly, and the flow that enters pressurized container simultaneously will can be owing to the burning that does not have additional fuel changes.Because the restriction that the load in the PFBC-power equipment raises and can how soon raise by the pressure in the pressurized container of firing chamber, thereby when being applied to such power equipment, the present invention can increase load quickly.If possible increase the volume that flows to gas turbine, then be merely able to pressurize to pressurized container so fast as non-the present invention as a kind of replacing method, but by the present invention, because higher energy can also be directly transmitted in the increase of volume flowrate.Up to this point, increase fast load and realize by reducing the output energy usually always, this be owing to gas-turbine compressor with the direct requirement more energy, so that can compress the air stream of the increase that enters pressurized container, but because the present invention has been arranged, this no longer is necessary.
According to a preferred embodiment of the invention, described device and parts are used for respectively supplying with described additional fuel and cooling medium to being used for above the fluidized bed of additional fuel in this burning the firing chamber of free space.It is particularly advantageous as a combustion space that the present invention utilizes the free space of so-called headroom on the fuel bed (free board), because a sizable volume is arranged, therefore, because hitherward fueling and cooling medium are easier to, so can supply with quite a large amount of additional fuels to the identical place of its neutralization simultaneously.In addition, do not have to produce the danger that damages any more sensitive equipment owing to any local temperature raises.
According to a further advantageous embodiment of the invention, the described device of additional fuel and cooling medium and parts of providing are supplied with this two kinds of materials, the further like this design of simplifying present device together in a kind of mode of mixture.The mixture of oil and water can be sprayed in the described flowing gas passage.
According to another preferred embodiment of the present invention, its equipment comprises the device of the ratio of a flow that is used for controlling feeding additional fuel and cooling medium in each flue gas channel and these two flows, according to different needs and existing condition, this device can obtain the additional-energy that produced by equipment.According to a preferred embodiment of the invention, its equipment also comprises parts that are used for measuring the flue-gas temperature of the described flue gas channel that is positioned at feeding additional fuel and downstream, cooling medium position, and control gear is used for carrying out described control according to the temperature information that transmits from these parts.Can guarantee that in this way flue gas reaches temperature desired exactly, the temperature of the flue gas that wherein obtains can not be too high, because it can cause the damage of flue gas channel, this temperature again can not be too low simultaneously, because this will reduce the efficient of gas turbine.
Here should point out that the present invention is very favorable in power equipment, wherein, the flue gas that leaves fluidized bed has had the temperature that can bear near the flue gas channel that leads to gas turbine, this is because in this case, the possibility that produces any additional-energy is had complete conclusive value, and after burning, also need directly cool off so that the temperature of flue gas is maintained on this level substantially.Yet the present invention also is applicable in the power equipment that allows flue-gas temperature that some risings are arranged certainly and the present invention is very favorable in this equipment, and for example, high-temperature filter is arranged on place far away relatively, flue gas channel upstream in this case.
Another preferred embodiment present device according to the present invention comprises that one is used for measuring the parts that the oxygen content of smoke gas at additional fuel and cooling medium position upstream place is provided at described flue gas channel, and control gear is set is used for carrying out described control according to the oxygen content of smoke gas numerical value that receives from said modules.Can be used to the oxygen in the flue gas of self-fluidized type bed thus with the method for the best because can guarantee that like this oxygen content after the additional fuel burning is excessive, but to make as far as possible its near the lower limit that sets to avoid the corrosion in the flue gas channel.
The sort of method that is limited according to the present invention, additional fuel is infeeded described flue gas channel between fluidized bed and gas turbine, to utilize residue oxygen available in the flue gas at this burning additional fuel, and cooling medium is infeeded in the flue gas with the additional combustion that infeeds in the flue gas channel in the same way, with this with the temperature regulation of flue gas to desired horizontal.The advantage of this method is described identical with the aforementioned device independent claims.
Other advantage of the present invention and favourable feature reflect from following description and other dependent claims.
Brief description of drawings
The preferred embodiment that the present invention provides is as an example described below with reference to accompanying drawings.
Fig. 1 schematic illustrations have the PFBC-power equipment of compound gas-vapor recycle (latter does not look out), equipment of the present invention can be applied in this power equipment.
Fig. 2 is the local concise and to the point sectional drawing of pressurized container that Fig. 1 medium power device interior is equipped with the firing chamber, and it illustrates a preferred embodiment of method and apparatus of the present invention.
The detailed description of preferred embodiment of the present invention
Aforesaid the present invention is not only limited to by any way and is applied in the PFBC-power equipment, promptly be applied in a kind of power equipment of pressurised fluidized bed granular fuel burning, but in the time of in being applied to this power equipment, equipment tool of the present invention has an enormous advantage, the described reason of using it for this power equipment that Here it is, and below incite somebody to action an embodiment's of this power equipment of 1 explanation general structure and function with reference to the accompanying drawings.
This equipment comprises a firing chamber 1, and this firing chamber will be placed in the pressurized container 2, and the volume of firing chamber is approximately 10 4m 3, its pressure can be pressurized to 16 crust according to appointment.To be used to firing chamber 1 pressurization and make the pressurized air 3 of bed 4 fluidisations in the firing chamber offer pressurized container.This pressurized air is to offer the firing chamber by the fluidisation nozzle 5 that fluidisation is enclosed in the bed of firing chamber that is used for that illustrates in firing chamber bottom.Described fluidized bed is to be formed by the granular fuel (preferably broken carbon) that burns in fluid bed material, granular absorbent and the fluidization air in importing this.The combustion gas that produce from this (below be called flue gas) are imported into in the illustrated purification plant 7 of square frame, and for example, this purification plant can be made of a series of cyclone dust collector that are used for isolating from flue gas particulate matter.This flue gas moves on then and enters the gas turbine 9 that comprises a high-pressure process 10 and a low pressure event 11.High pressure combustion turbine 10 and high pressure compressor 12 and generator 13 coaxial settings, generator is driven by the high pressure air turbine like this, therefrom absorbs available energy.High pressure compressor 12 is given firing chamber 1 by pipeline 14 with pressurized air.
The gas that expands in high pressure air turbine 10 is imported into low pressure gas turbine 11.Leave the low pressure gas turbine waste gas still have an energy, therefore a province can be set can device 16.Low pressure compressor 17 also can with the coaxial setting of low pressure gas turbine, and provide atmospheric air to low pressure compressor through a filter 18.In addition, low pressure compressor is driven by the low pressure gas turbine, and the outlet from this low pressure compressor offers high pressure compressor with the air that compresses in first process.An interstage cooler 19 is arranged between low pressure compressor and the high pressure compressor, so that reduce the air temperature of supplying with high pressure compressor 12 inlets.
This power equipment has a vapor wheel pusher side, here not shown, but it is expressed by one group of pipe 20 that is immersed in the fluidized bed 4, and here water is by pipe be used for that heat exchange between the fluid bed material of the heat that the absorbent bed internal combustion produced circulates, evaporation and overheated.
Cardinal principle according to the operation of the power equipment of this form of foregoing description can be clear that from foregoing description.
Power output, promptly the load of such power equipment can be controlled by regulating the fluidized bed level and the fuel of supply fluidized bed and the flow of air.Yet under certain situation, the variation of the power machine utilization of hope is also wished to produce from power equipment than managing by regulating the energy more energy that operation produces faster than the variation that Control Parameter can realize.How the present invention shows ways of addressing this issue, wherein in the time will satisfying that the back is a kind of wishes, the gas turbine that needs power equipment under the full load condition of this equipment standard with its power limit running.
Explain now with reference to main accompanying drawing 2 and the equipment of the preferred embodiment of the present invention to show the pressurized container 2 and the firing chamber 1 that are provided with in the equipment among the figure briefly.When supplying with the fuel combustion of fluidized bed 4, the hot flue gas of 800～850 ℃ of formation on fluidized bed, the temperature of this gas is with consistent through the gas temperature of gas channel arrival gas-turbine 9, and do not have high-temperature filter on the gas channel of this equipment.Carry out to such an extent that lack air in the fluidized bed different piece faster for fear of the fuel combustion of supplying with on the fluidized bed, therefore must provide more air to fluidized bed by fluidisation nozzle 5, like this, the averaged oxygen content in the described fuel gas just can have certain value.On the other hand, be corrosion and other problems in the flue gas path of avoiding arriving gas turbine, making the oxygen content in the flue gas is that a less value then is necessary.This is the oxygen amount that burning can provide in the described flue gas path.A device that schematically illustrates 21 is arranged in the equipment of the present invention, and this device sprays into free space 22 on the fluidized bed 4 with additional fuel, promptly so-called headroom, and this additional fuel can be made up of rock gas, oil, carbon or similar substance.This equipment comprises that also one is used for cooling medium, water preferably, form with liquid state or steam sprays into the parts 23 that free space 22 comes cooled flue gas, therefore, the temperature of flue gas particularly can be adjusted to a desirable level to the flue-gas temperature in flue gas path and the gas turbine.Best is that form with drop provides water, so also can utilize the vaporization heat of water effectively to cool off.Should note under various given situations, can provide additional fuel and cooling medium, and mode shown in Figure 2 is just in order to explain the present invention to be considered to best mode.Thus, additional fuel and cooling medium can be supplied with in order to favourable hybrid mode, for example the mode of mixing with oil droplet and water droplet.
This equipment also comprises the parts 24 and 25 that schematically illustrate, and they are used for measuring its temperature and O in the flue gas in feeding additional fuel and downstream, cooling medium position 2Content, and send this figurate number information to control gear that schematic illustrations goes out, this control gear are used for controlling additional fuel and the flow of cooling medium and the ratio between this two amounts to free space 22 provides according to measured parameter value.Supply flow is the delivery volume of unit time.The manual operation function of control gear preferably also can be provided or the manual operation function of described device 21 and parts 23 directly is provided.And can make control gear according to any control program work that provides, and for example, in case need to increase when loading with regard to horse back feeding additional fuel and cooling medium.
The function of present device is as follows, if gas turbine is not subjected to the restriction of power equipment, when power equipment in that work under the full load and wish can be from power equipment during the supervene energy, can control described device 21 and parts 23 and provide additional fuel and cooling medium, so that utilize the residue oxygen cooling so-called " headroom burning " that exists in the flue gas to free space 22.The mass flow rate that flows to gas turbine is to improve in the mode that increases its pressure under constant volume flow, and gas turbine transmits higher energy like this.In addition, the maximum total energy that can also can from power equipment, develop with 10% order of magnitude increase in this way.When this power equipment is worked under a lower load, 4 cover part pipe fittings 20 of fluidized bed, this means that the temperature that the gas that leaves fluidized bed has is lower than desirable, it may be 600-650 ℃, and, in this case, though be not use the present invention based on principle, equipment of the present invention can only not carry out the temperature that any cooling improves fuel gas by spraying into additional fuel, so that this equipment obtains a high efficiency under sub load.When the hope load rises rapidly, described device 21 and parts 23 can be in free space 22 feeding additional fuel and cooling medium, utilize the required oxygen of additional combustion that exists in the space immediately so that rise by the acceleration that obtains like that as described in the introduction to load, described in the introduction or make the material that flows to gas turbine keep constant, it can pressurize to pressurized container quickly by the increase of load, or increase flows to the mass flow rate of gas turbine, but pressurization only allows to carry out soon as without any additional combustion to pressurized container, this just means directly to have higher energy, therefore, needn't so that can be pressed into the method for pressurized container load be improved by reducing by the direct required additional-energy of gas-turbine compressor by the air stream that will increase.
Like this, the present invention satisfies the demand that produces additional-energy sometimes in this power equipment in a kind of FA mode.The generation of this energy realizes by very simple device, and cost is low, and therefore, the oxygen that has been present in the flue gas path is used to burning.Like this, do not need other air pressurized, otherwise can consumed energy and reduce the efficient of additional combustion.Because without any need for the compressor or the similar device of costliness, so equipment of the present invention is more cheap.In addition, insensitive to the balance between gas turbine and the steam turbine, but to make invocation point more excessive can be more favourable to boiler.
Should be noted that the auxiliary combustion that is used for additional fuel of deriving from fluidized bed flue gas residue oxygen exist nature not get rid of to resupply air or oxygen in other mode, the present invention will comprise the burning of this additional fuel oxygen consumed.
Certainly, should by any way the present invention be defined in above-mentioned preferred embodiment, yet under the situation that does not break away from basic thought of the present invention, many possible improvement of the present invention show easily to those skilled in the art to be seen.

Claims (17)

1. method that in the power equipment of firing chamber (1), produces additional-energy with bed (4), wherein on fluidized bed air supply and fuel to carry out the burning of fuel, the hot flue gas of formation above this bed simultaneously, and gas turbine (9) by this flue gas drive so that produce power; It is characterized in that additional fuel is infeeded the passage of the described flue gas between described bed and gas turbine, facilitate the use burn wherein additional fuel of residue oxygen available in the flue gas, and in flue gas, supply with cooling medium together along with in flue gas channel, infeeding additional fuel, so that the temperature regulation of flue gas is arrived desirable level.
2. a kind of method according to claim 1 is characterized in that additional fuel and cooling medium are supplied with the described flue gas channel in bed (4) the top free space (22) in the firing chamber (1).
3. a kind of method according to claim 1 and 2, it is characterized in that this method is used for power equipment, wherein at power equipment under the situation that does not add described additional fuel during with oepration at full load, described gas turbine (9) can not reach its capacity limits, and power equipment infeeds additional fuel and cooling medium during with running at full capacity in described flue gas channel, so that increase by the energy of gas turbine output and increase the maximum total energy of power equipment output thus.
4. according to any one method described in the claim 1-3, when it is characterized in that the operation at part load when power equipment in described flue gas channel feeding additional fuel and cooling medium make load quicken the raising that power equipment is loaded.
5. according to any one method described in the claim 1-4, it is characterized in that temperature, and control additional fuel and cooling medium consumption and their ratio that infeeds in the flue gas channel according to the temperature value of being surveyed at the measured downstream flue gas that additional fuel and cooling medium position are provided.
6. according to any one method described in the claim 1-5, it is characterized in that measuring the oxygen content in the downstream part flue gas that additional fuel and cooling medium position are provided, and control additional fuel and the flow of cooling medium and their ratio that infeeds in the flue gas channel according to the oxygen content of being surveyed.
7. equipment that in the power equipment of firing chamber (1), produces additional-energy with bed (4), wherein carry out fuel combustion to this air-supplied and fuel, above this bed, produce hot flue gas simultaneously, and drive gas turbine (9) by these flue gases and come produce power, it is characterized in that this equipment comprises in the passage (22) of the described flue gas between described bed and gas turbine provides additional fuel, so that utilize in this passage, the burn device (21) of additional fuel of residue oxygen available in the flue gas, and infeed along with described that additional fuel provides cooling medium together in flue gas so that flue-gas temperature is adjusted to the parts (23) of a desirable level in flue gas channel.
8. equipment according to claim 7 is characterized in that described device (21) and parts (23) are used for providing additional fuel and cooling medium respectively to the firing chamber of the free space (22) of fluidized bed (4) top, so that at this burning additional fuel.
9. according to claim 7 or 8 described equipment, it is characterized in that this equipment is used for power equipment, wherein when power equipment during with oepration at full load, described gas turbine (9) can not reach its maximum productivity under the situation of this equipment not, and when power equipment during with oepration at full load, described device (21) and (23) are used for supplying with described additional fuel and cooling medium respectively to described flue gas channel, so that increase the energy of gas turbine output and increase the maximum total energy that power equipment is exported thus.
10. according to described any one equipment of claim 7-9, it is characterized in that when described power equipment during with operation at part load, described device (21) and parts (23) are used for providing described additional fuel and cooling medium respectively to described flue gas channel, increase load thus to quicken the raising of power equipment load.
11., it is characterized in that this equipment comprises that one is used for controlling to flue gas channel the flow of described additional fuel and cooling medium and the device (26) of their ratio are provided according to described any one equipment of claim 7-10.
12. equipment according to claim 11, it is characterized in that this equipment comprises that one is used for measuring and is supplying with the parts (24) of downstream, the position flue-gas temperature of described additional fuel and cooling medium to flue gas channel, and control gear (26) is set is used for carrying out described control according to the temperature information that assembly is surveyed.
13. according to claim 11 or 12 described equipment, it is characterized in that this equipment comprises parts (25) that are used for measuring the oxygen content in the flue gas in the downstream, position that described additional fuel and cooling medium are provided to described flue gas channel, and control gear (26) is set is used for carrying out described control according to the value of the flue gas oxygen content that receives from assembly.
14., it is characterized in that being provided with the described device (21) of additional fuel and cooling medium and the parts (23) of providing and be used for supplying with this two kinds of materials together with the form of mixture according to described any one equipment of claim 7-13.
15., it is characterized in that being provided with described parts (23) and be used to provide water as cooling medium according to described any one equipment of claim 7-14.
16. according to described any one equipment of claim 7-15, it is characterized in that this equipment is arranged in the power equipment with bed (4), bed (4) is the air institute fluidisation supplied with by its bottom, is embedded with one group and has circulatory mediator so that endergonic pipe fitting (20) in this bed.
17. according to described any one equipment of claim 7-16, it is characterized in that this equipment is arranged on its firing chamber (1) and is arranged in the power equipment in the pressurized container (2), air in the pressurized container is to pressurize by one or several pressurized container (12,17) that is driven by gas turbine (9).
CN96190720A 1995-06-20 1996-06-19 Method and equipment for generating additional energy in a power plant Pending CN1167518A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9502234-9 1995-06-20
SE9502234A SE503926C2 (en) 1995-06-20 1995-06-20 Method and apparatus for additional power generation in a power plant

Publications (1)

Publication Number Publication Date
CN1167518A true CN1167518A (en) 1997-12-10

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ID=20398678

Family Applications (1)

Application Number Title Priority Date Filing Date
CN96190720A Pending CN1167518A (en) 1995-06-20 1996-06-19 Method and equipment for generating additional energy in a power plant

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EP (1) EP0834008A1 (en)
JP (1) JPH11508344A (en)
KR (1) KR19990023027A (en)
CN (1) CN1167518A (en)
SE (1) SE503926C2 (en)
WO (1) WO1997001025A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002020952A1 (en) * 2000-07-28 2002-03-14 Anpei Han Partially-gasified air-preheated and coal-fired combined cycle power generation system and power generation method
CN1925958A (en) * 2004-02-27 2007-03-07 美国石膏公司 Swinging agitator for a gypsum calcining apparatus and the like

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998046863A1 (en) * 1997-04-14 1998-10-22 Ebara Corporation Pressurized fluidized-bed combined-cycle electric generating system
JP3621809B2 (en) * 1997-06-27 2005-02-16 三菱重工業株式会社 Gas turbine output increasing method in combined power generation system

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SE458955B (en) * 1987-10-20 1989-05-22 Abb Stal Ab PFBC KRAFTANLAEGGNING
US5043150A (en) * 1990-04-17 1991-08-27 A. Ahlstrom Corporation Reducing emissions of N2 O when burning nitrogen containing fuels in fluidized bed reactors
SE470222B (en) * 1992-05-05 1993-12-06 Abb Carbon Ab Procedure for maintaining nominal working temperature of the flue gases in a PFBC power plant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002020952A1 (en) * 2000-07-28 2002-03-14 Anpei Han Partially-gasified air-preheated and coal-fired combined cycle power generation system and power generation method
CN1925958A (en) * 2004-02-27 2007-03-07 美国石膏公司 Swinging agitator for a gypsum calcining apparatus and the like
CN1925958B (en) * 2004-02-27 2013-08-21 美国石膏公司 Swinging agitator for a gypsum calcining apparatus and the like

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KR19990023027A (en) 1999-03-25
SE9502234L (en) 1996-09-30
WO1997001025A1 (en) 1997-01-09
SE503926C2 (en) 1996-09-30
EP0834008A1 (en) 1998-04-08
SE9502234D0 (en) 1995-06-20
JPH11508344A (en) 1999-07-21

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