CN102388267A - Method and assembly for improving the dynamic behavior of a coal-fired power plant for primary and/or secondary requirements of the power grid operator with respect to the current output into the grid - Google Patents
Method and assembly for improving the dynamic behavior of a coal-fired power plant for primary and/or secondary requirements of the power grid operator with respect to the current output into the grid Download PDFInfo
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- CN102388267A CN102388267A CN201080016884XA CN201080016884A CN102388267A CN 102388267 A CN102388267 A CN 102388267A CN 201080016884X A CN201080016884X A CN 201080016884XA CN 201080016884 A CN201080016884 A CN 201080016884A CN 102388267 A CN102388267 A CN 102388267A
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- 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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/02—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in parallel arrangement
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- 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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
- F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1006—Mills adapted for use with furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/10—Supply line fittings
- F23K2203/103—Storage devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/10—Supply line fittings
- F23K2203/105—Flow splitting devices to feed a plurality of burners
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Feeding And Controlling Fuel (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
Abstract
The invention relates to a method for improving the dynamic behavior of a coal-fired power plant for primary and/or secondary requirements of the power grid operator with respect to the current output into the grid, wherein the power plant has a nominal output (RC) and is operated by way of firing, wherein upon an increase in the primary and/or secondary requirements of the power grid operator with respect to the current output into the grid the coal dust volume that is supplied is raised with respect to the present actual output, and wherein upon a decrease in the primary and/or secondary requirements of the power grid operator with respect to the current output into the grid the coal dust volume that is supplied is lowered with respect to the present actual output and is stored, and to an assembly for carrying out the method.
Description
Technical field
The present invention relates to be used for exporting to the electric current that is transported to network; Improve coal-fired under the situation of the main and/or less important requirement that (Stromabgabe) power grid operation merchant
is proposed; (kohlegefeuert) power station; The method of dynamic property (Kraftwerk) and assembly.
Background technology
Remaining on alternating voltage frequency (Wechselspannungsfrequenz) in the electrical network constant is free-revving engine.Depart from predetermined frequencies electrical appliance (Verbraucher) inefficacy that can cause being connected to network and the harmful result who causes thus.
When the power requirement to the power station that is connected with electrical network changes suddenly (for example because the power station because accident is broken off with network or large-scale electrical appliance inserts or because network configuration or network allocation change), then especially occur and the departing from of the network value of being scheduled to.In order network to be remained consistently predetermined value or to remain in certain definite margin of tolerance, in so-called main regulation
or main regulation power
scope, must provide: produce power and offered load maintenance balance and generation always and the as many electrical power of passing through offered load consumption when moving with predetermined network.At this; Main regulation also supported by secondary adjusting or secondary adjusting power, this secondary adjusting or secondary adjusting power correct through main regulation variation suddenly that (ausregeln) consumes the power that is perhaps produced afterwards pseudostationary
of compensating frequency and transmitted power depart from.
In order in the shortest time, to resist departing from of (entgegenwirken) and predetermined network value, some national Virtual network operators are stipulated in its standard: this must accomplish down at which situation or pre-conditioned (Vorgabe).For example; The Virtual network operator national grid transmission of electricity Co., Ltd of Britain stipulated through its file " network code (The Grid Code) " third phase: under the situation of frequency departure; The power station that is connected to electrical network is for example in the method for operation of its rated power 65%; In main regulation or major requirement scope, in 10 seconds with power station power raise its rated power 10% and therefore resist frequency departure.This time go up very fast and power bracket on very large variation to the power station, especially bigger requirement is proposed at the coal fired power generation station.
Large-scale coal fired power generation station is configured with coal powder burner (Kohlestaubfeuerung) usually; In this coal powder burner, pulverize the coal that pulverizes in the equipment (Kohle-Mahlanlage) is directly imported the power station through the coal dust pipeline combustion chamber (so-called " directly " coal powder burner) at coal.For good burning, good efficient, few discharging and in ashes few unburning material, the preparation of fuel (aufbereiten) is one of principal element, with for this byproduct capable of using.In order to prepare coal; Coal pulverizes thermal balance and the mass flow balance that equipment or coal mill (Kohlem ü hle) must be arranged in stable state; This causes: can be at the coal powder burner place and therefore only originally be in the power station and can realize load variations lentamente; And thus, in the load variations of carrying out or need, produce time delay.
Be the important component part of equipment total delay time the time delay of coal mill when fuel quantity or fuel supply variation.Preparing process (depending on soft coal purity, humidity, hardness and grinding machine load) corresponding to soft coal the time delay of coal mill can be long and time delay that therefore influence total equipment unfriendly.
Summary of the invention
At present; The objective of the invention is: realize a kind of be used under the situation of the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network and improve the method for the dynamic property at coal fired power generation station; In the method; Reduce the time delay of the coal powder burner in power station like this, that is, the regulations or the condition of each national grid operator observed in the power station.In addition, the objective of the invention is: realize a kind of be used under the situation of the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network and improve the assembly of the dynamic property at coal fired power generation station.
The summation of the purpose that preamble is mentioned characteristic through claim 1 aspect method realizes, and the summation of the characteristic through claim 9 realizes aspect assembly.
The favourable design of the present invention draws from dependent claims.
Realize being used under the situation of the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network, improving the method and the assembly of the dynamic property at coal fired power generation station through solution according to the present invention, this method or assembly have following advantage:
-realize so possibility for power station operator, that is, under the situation consistent, obtain for the necessary permission of building and runing the power station with the national network frequency requirement of regulation.
-perhaps reaching high profit becomes possibility to make power station operator more economical ground commanding apparatus through sale main regulation reserves
.
-this becomes possibility for the manufacturer in this type power station or supplier, that is, can or sell on the world market this power station supply, for example UK, Ireland, France, China, India, Singapore etc.
The favourable structural scheme of the present invention is arranged to: have storage volume (V
Sp) feed bin normal in service to be utilized coal powder filled pact at (volumenseitig) aspect the volume half the in indirect-firing system; Being used for subsequent use to be used for (Vorhaltung) and under the situation that improves the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network, using, and the remaining storage volume that is used for holding and stores the coal dust of excessive production is used under situation about reducing the main and/or less important requirement that the power grid operation merchant proposed to the electric current output that is transported to network.
In the favourable design of the present invention, realize that through the handling capacity (Durchsatzleistung) that improves or reduce distributor gear with the mode of regulating the raising of the coal dust amount of conveying perhaps reduces indirectly.Thus, can accurately consider the demand at coal fired power generation station or to the dynamic property at coal fired power generation station.
Favourable design is arranged to: when improving or reduce the coal dust amount of carrying indirectly, improve or reduce the volume flow of carrying gas blower with the mode of regulating.Keeping coal dust does not thus have and frictionally enters into the combustion chamber.
Advantageously, the piece power adjusting (Blockleistungsregelung) that is required influence by electrical network through the coal fired power generation station is to the raising and the minimizing of the handling capacity of distributor gear and/or carry the raising or reduce of the volume flow of gas blower to work.Guarantee through this measure: under the situation that change of frequency perhaps claims in electrical network; The influence of network adjustment arrives the piece power adjusting and its burner at coal fired power generation station at once; And thus; Under the situation of not free loss, introduce counter-measure, with in order to optimize the dynamic property in power station.
In the favourable structural scheme of the present invention, major requirement or main regulation are through the signal activation of Long-distance Control.In another favourable structural scheme of the present invention, less important requirement or secondary adjusting be the signal activation through Long-distance Control equally.
In addition, less important requirement or secondary adjusting can activate through the written or oral indication to the operating personnel in power station.
Description of drawings
Next, further explain embodiments of the invention by drawing with describing.Wherein:
Fig. 1 has shown the extracts that comes from Britain electrical network regulation (network code (UK)); Wherein, Extracts is pointed out to respect to the minimum requirement figure of the frequency dependence of the change of frequency of the 0.5Hz of target frequency (the minimum frequency response to respect to the change of frequency of target frequency 0.5Hz requires figure)
Fig. 2 has shown the extracts that comes from Britain electrical network regulation (network code (UK)), wherein, takes passages the explanation (explanation of main and less important response) of pointing out main regulation and secondary adjusting or major requirement and less important requirement,
Fig. 3 schematically shows and is used under the situation of the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network and improves the assembly of the dynamic property at coal fired power generation station; Wherein, The coal that shows the coal dust pipeline that comprises the power station burner pulverizes equipment, and
Fig. 4 schematically shows the relation that time and combustion method are depended in power raising
.
The specific embodiment
In electric flux feed system (electrical network), the power of generation must be all the time and the consumed power balance.The variation of user load or the interference in power station damage this balance and cause the frequency departure in the network, and the machine of participating in main regulation or major requirement reacts to this frequency departure.Main regulation or and its major requirement at the same level because its adjusting behavior guarantees in several seconds, to rebulid the balance between the power that produces and consume.Wherein, frequency remains in the boundary value of permission.In electrical network, after the variation suddenly of the power that consumes or produced correcting, between each control band, there be pseudostationary the departing from (reference target value) of frequency Δ f and transmitted power Δ Pi through main regulation or major requirement.Thus; Secondary adjusting or less important requirement are worked; The purpose of this secondary adjusting or less important requirement is: frequency is drawn to get back on its desired value and transmitted power drawn gets back on about definite value, and thus with the whole main regulation power that is activated once more as reserves for use.
Fig. 1 has shown the main regulation of Britain's electrical network rules (network code UK) and the explanation of secondary adjusting or main regulation power and secondary adjusting power or major requirement and less important the requirement explanation of less important analog value (main and), and it is realized when with respect to electrical network target frequency (target frequency) being the frequency departure (change of frequency) of 0.5Hz.The chart of Fig. 1 is pointed out: the power station that is connected with electrical network must utilize device responds performance (device responds) at 10 seconds time interval T according to main regulation P
SpInternal reaction, and at this power station power that must raise.At this time interval T
SpThe size that interior power raises depends on load area, utilizes this load area, power station operation when frequency descends just.The minimum load that Britain's electrical network rules for example require in regulation (minimum generating) be that stipulate 65% o'clock of power station rated power RC (marked capacity (Registered Capacity)), must be with in 10 seconds, raise 10% (percentage AP) (see figure 2) of rated power or rated capacity RC in power station of power station power for this fractional load.(abscissa shows the load area (percentage of RC) in power station according to Fig. 2; Ordinate shows main regulation or secondary adjustable range (percentage of RC)), should guarantee 10% of the power station rated capacity RC that between 65 to 80% the fractional load zone of power station rated power RC, raise.Between 80 to 100% the fractional load zone of power station rated power RC, the power rise drops to 0 from 10% linearly.
Under the situation that exceeds in the frequency main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported in the network or reduce; Be arranged to according to Fig. 2, will in 10 seconds, have reduced 10% of power station rated power RC at the power station power in the fractional load zone between rated power 95% and 70%.Between the fractional load zone of power station rated power RC70% to 65%, the power slippage drops to about 6.5 linearly from 10%, and between 100% and 95% fractional load zone, the power slippage is increased to 10% from about 5% linearly.In addition, Fig. 2 has pointed out that this minimum load is 65% of a power station rated power by the minimum load in the power station of Britain's electrical network requirement (minimum generating MG).
Fig. 3 exemplarily points out: how can realize that this is by Britain's electrical network rules requirement.For this reason, according to the present invention and the burner 1 in unshowned power station exemplarily be configured with four coals and pulverize equipment 2.1,2.2,2.3,2.4; All coals pulverize equipment 2.1,2.2, and 2.3,2.4 can directly light unshowned combustion chamber, power station (directly burning or direct fired system); Wherein, coal pulverizes equipment 2.1,2.2,2.3; 2.4 at least one so construct, that is, replace thus directly lighting also lighting combustion chamber (indirect burning or indirect-firing system) indirectly, promptly; Coal pulverizes equipment 2.1,2.2, and at least one of 2.3,2.4 also additionally is configured with indirect-firing system except direct fired system.
Utilize the perhaps direct fired system of directly burning to mean: to pulverize equipment or coal mill 2.1 at coal; 2.2; 2.3; 2.4 in the coal that grinds through coal dust pipeline 3.1,3.2,3.3; 3.4 perhaps support air (Tragluft) directly to import the combustion chamber, and burning therein by means of vector gas
.At this, according to Fig. 3, each coal pulverizes equipment 2.1,2.2; 2.3 2.4 can serve (bedienen) burner rank (Brennerebene) respectively, and pulverize equipment 2.1 from coal respectively; 2.2,2.3, the 2.4 coal dust pipelines 3.1 that set out; 3.2 3.3,3.4 serve respectively at the every nook and cranny of the combustion chamber of the common rectangle in coal fired power generation station or the unshowned burner in the sidewall.
Utilization is lighted indirectly or indirect-firing system means: pulverize equipment or coal mill 2.1,2.2,2.3 at coal; 2.4 in grind or the coal that pulverizes through coal dust pipeline 3.1,3.2,3.3; 3.4 see off, and at first on the direction of combustion chamber, guide, yet after this respectively through being arranged in coal dust pipeline 3.1; 3.2, the coal dust turnout (Kohlenstaub-Weiche) 6 in 3.3,3.4 and through storage pipeline 7.1; 7.2 7.3,7.4 are transported to for the common separator (Abscheider) 4 of all storage pipelines.In separator 4, coal dust and vector gas or support air separation or separate and import feed bins 5 and be stored in wherein through connecting line 8.Through transfer pipeline 9.1,9.2,9.3,94 and the distributor gear 10 in this transfer pipeline, arranging and regulate; Coal dust can sucking-off from feed bin 5, and can be transported to coal dust pipeline 3.1,3.2 through charging gear (Aufgabevorrichtung) 15 and another coal dust turnout 13 in 6 downstream, the first coal dust turnout respectively; 3.3,3.4, with for from this coal dust pipeline 3.1; 3.2, be transported in the combustion chamber in 3.3,3.4.For coal dust that will sucking-off from feed bin 5 is transferred in the combustion chamber; To carry gas (for example air) to be transported to through carrying gas piping 11 at intake line 9.1; 9.2; 9.3, being arranged in the charging gear 15 in distributor gear 10 downstream in 9.4, this carries gas by carrying gas blower 12 guiding (heranf ü hren).Charging gear 15 can for example be injector, feed-shoe (Aufgabeschuh), dirt pump etc.
Separated vector gas perhaps supports air to pass through 14 derivation of vector gas output pipe and input atmosphere in separator 4, and wherein, it is cleaned in the dirt piece-rate system before this once more.Vector gas also can not import in the atmosphere; And be directed in the combustion chamber or import to the gas flue (Rauchgaszug) after the combustion chamber that places at coal fired power generation station and dedusting in the existing dirt piece-rate system of power station plant (for example E shape filter, bag filter etc.).
Different with Fig. 3 is, storage pipeline 7.1,7.2, and each of 7.3,7.4 can have the feed bin 5 after special-purpose separator 4 and special-purpose the placing respectively, and after this each intake line 9.1,9.2,9.3,9.4 deflects from from feed bin 5.
Normally in service in the power station, pulverize equipment 2.1,2.2 according to the coal of the burner 1 of Fig. 3,2.3 so work, that is, the coal dust that pulverizes therein respectively through coal dust pipeline 3.1,3.2,3.3,3.4 directly the input combustion chambers to be used for burning.Pulverize in the equipment 2.4 at coal (this coal pulverize equipment 2.4 exemplarily (it is not to pulverize equipment 2.4 but arbitrary other equipment that pulverizes yet) also additionally be configured with indirect-firing system except direct fired system); Be arranged in coal dust pipeline 3.1,3.2,3.3; 3.4 in coal dust turnout 6 and 13 so adjust; That is, pulverizing the coal dust that pulverizes in the equipment 2.4 at coal is not directly to import the combustion chamber, but through feed bin 5 input combustion chambers.For this reason, be arranged in intake line 9.1,9.2, distributor gear 10 in 9.3,9.4 and charging gear 15 work, and through carrying gas piping 11 and carrying gas blower 12 will carry gas to offer charging gear 15.Carry gas in charging gear 15, to receive the coal dust that distributes by distributor gear 10 respectively, and it is transported in the combustion chamber.The method of operation of pulverizing equipment 2.4 is so; Promptly; Usually in when beginning operation, that pulverizes equipment 2.4 pulverizes power with respect to pulverizing equipment 2.1,2.2; 2.3 pulverize power or instantaneously pulverize power demand or improve with respect to the instantaneous actual power of pulverizing equipment 2.4 with respect to what pulverize equipment 2.4, to have storage volume V filling aspect the volume for the excessive supply that utilizes the fuel that grinds
SpFeed bin 5 is half the approximately.After carrying out filling feed bin 5, pulverize pulverizing power and pulverizing equipment 2.1,2.2 of equipment 2.4,2.3 the instantaneous power demand that pulverizes that pulverizes power or pulverize equipment 2.4 matches.Stowing operation except feed bin 5; The seeing off of distributor gear 10-or transmission power conform to the power that pulverizes that pulverizes equipment 2.4 amount aspects; That is, after stowing operation, see off as being sent to the feed bin 5 by the coal dust amount of pulverizing equipment 2.4 productions and with it from feed bin 5; Wherein, consider the loss of the minimum in separator 4.
Change or frequency descends or frequency falls for example under the situation of 0.5Hz at mains frequency; Export the main and/or less important requirement that the power grid operation merchant is proposed through electrical network network adjustment or this network adjustment to the electric current that is transported in the network; Influence the piece power adjusting at coal fired power generation station; This piece power adjusting makes the amount of coal dust of from feed bin 5, seeing and import indirectly the combustion chamber off through distributor gear 10 with respect to instantaneous actual power or with respect to pulverizing equipment 2.1 through coal respectively; 2.2 the coal dust amount of 2.3 inputs obviously improves.At this; Can be in the shortest time will be in feed bin 5 store to this purpose and the coal dust of subsequent use (vorgehalten) is incorporated in the combustion chamber being used for burning, and aspect burner, the dynamic property of improving the coal fired power generation station is played obvious effect thus.Instantaneous actual power is represented such power or fractional load,, utilizes the instantaneous manipulation coal fired power generation of this power station that is; And the fuel quantity of input combustion chamber and same thus each coal pulverize equipment 2.1; 2.2 other handling capacity also depended on this power in 2.3,2.4 minutes.
Exceed at mains frequency under the situation of 0.5Hz for example; Export the piece power adjusting that the main and/or less important requirement that the power grid operation merchant is proposed influences the coal fired power generation station through electrical network network adjustment or this network adjustment to the electric current that is transported in the network; The combustion chamber seen and imported indirectly to this piece power adjusting will off through distributor gear 10 from feed bin 5 the amount of coal dust is with respect to instantaneous actual power or with respect to pulverizing equipment 2.1,2.2 through coal respectively, the coal dust amount of 2.3 inputs and obviously reducing; And thus; As improving the coal dust amount, aspect burner, play obvious effect when improving the dynamic property at coal fired power generation station.At this, that equipment 2.4 provides during this process and unnecessary by pulverizing, that is, excessive coal dust is buffered in the feed bin 5.
In order to realize improving the dynamic property at coal fired power generation station, place coal to pulverize equipment 2.4 feed bin 5 designs and structure afterwards and have corresponding saturation or storage volume V
SpTo be used for coal dust to be stored.Yet four exemplary in Fig. 3 coals pulverize equipment 2.1,2.2, and other coal of 2.3,2.4 pulverizes equipment and also can be configured with indirect-firing system respectively and be configured with feed bin 5 thus to be used to store coal dust.For example, if two, three or all four coals pulverize equipment 2.1,2.2,2.3,2.4 additionally are configured with indirect burning device or indirect-firing system, the storage volume or the saturation V of requirement that then can coal dust is total
SpBe assigned to feed bin 5 places of existing quantity, perhaps storage volume V
SpQuantity through improving feed bin 5 improves.Through additionally making a plurality of equipment that pulverize be configured to have indirect-firing system and the coal dust memory space in feed bin 5 that therefore improves, can further improve the fuel distributed power at coal fired power generation station when needed.Through improving dynamics aspect the fuel, the main reserves and the less important reserves at coal fired power generation station also can improve or raise.
The storage volume V of feed bin 5
SpSo design is promptly in service normally, that is, under the state of stable state, the storage volume V of feed bin 5
SpBe filled half the approximately; And store enough coal dusts at this; To export under the situation of the main and/or less important requirement that the power grid operation merchant is proposed in order to descend in frequency or to be directed against the electric current that is transported in the network, that is, and under the astable state; Can the coal dust amount that improve be incorporated in the combustion chamber, with in order to improve the dynamic property in power station.On the other hand; Feed bin 5 also must have enough memory spaces, to export under the situation of the main and/or less important requirement that the power grid operation merchant is proposed, promptly in order to exceed in frequency or to be directed against the electric current that is transported in the network; Be astable state once more; Can the coal dust amount that reduce be incorporated in the combustion chamber, and at this, during the unstable state state, hold or be stored in the feed bin 5 by pulverizing excessive coal dust amount that equipment 2.4 produces.
Except one or more feed bin 5, in addition can be in these one or more feed bin 5 downstream until the combustion chamber to construct distributor gear 10, charging gear 15 and coal dust pipeline (intake line 9.1,9.2 in corresponding mode aspect the size; 9.3; 9.4 and coal dust pipeline 3.1,3.2,3.3; 3.4), with for can be in the short time of needs the fuel quantity that needs of guiding and it is transported to the combustion chamber.Through transfer pipeline 11 with by means of carrying gas blower to guide required for this reason conveying gas or support air with the mode of regulating.
Fig. 4 has schematically pointed out the direct and indirect burning device at coal fired power generation station or the dynamic property of direct and indirect-firing system.In direct burner, with steam generator power (Dampferzeugerleistung) from L
0Rise to L
1The time need be from t
0Time t sets out
2, and in the indirect burning device, likewise promoting steam generator power only need be from t
0The time t that sets out, and thus at time t
0Interior obviously near rising desirable, step (step-function response).Through according to the method for the invention or according to assembly of the present invention; Coal pulverizes equipment 2.1,2.2,2.3; 2.4 at least one also be configured with the indirect burning device except direct burner; And move as the indirect burning device, and export the main and/or less important requirement that the power grid operation merchant is proposed, with respect to the coal dust amount of the indirect input in the stable network frequency for the change of frequency in electrical network or to the electric current that is transported in the network; Improve or reduce and from feed bin 5, see and be transported to indirectly the coal dust amount in the combustion chamber off; Can obviously improve the dynamic property and the response that therefore improves equipment equally according to the burner of Fig. 4, that is, and the dynamic property at coal fired power generation station.Steam generator power is from L
0To L
1Rising be the percentage A of power station rated power RC
P, 10% of power station rated power RC has for example raise.
Pulverize at coal in maintenance or cancellation under the situation of distributor gear 10 or charging gear 15 of indirect-firing system at equipment 2.4 places; Through adjustment (umstellen) coal dust turnout 6 and 13, and coal dust passed through coal dust pipeline 3.1,3.2; 3.3; 3.4 directly import the combustion chamber, and therefore make feed bin 5 and distributor gear 10 and charging gear 15 bypass, then can be used as direct fired system continuation manipulation coal and pulverize equipment 2.4.If other coal pulverizes equipment 2.1; 2.2; 2.3 additionally be configured with indirect-firing system; Then one or more coal pulverizes equipment and can be adjusted to as indirect-firing system by means of the adjustment of coal dust turnout 6 and 13 and move, and therefore can temporarily replace coal to pulverize the indirect-firing system in maintenance of equipment 2.4.
Certainly; Utilize according to the method for the invention or assembly according to the present invention aspect main regulation and less important adjusting or major requirement and less important requirement and resultant device responds; Perhaps aspect the improved dynamic property in coal fired power generation station; Not only observe the requirement of perhaps satisfied Britain's electrical network rules of exemplarily quoting as proof and these rules, also observe the perhaps rules of the world of other country, these rules require coal fired power generation station to have rapidly or improved dynamic property.For this reason, only as possible, the storage volume V of one or more feed bin 5
SpAnd the handling capacity and the rules of distributor gear 10 and/or charging gear 15 and/or conveying gas blower 12 are complementary.
List of reference characters
1 burner
2.1 coal pulverizes equipment
2.2 coal pulverizes equipment
2.3 coal pulverizes equipment
2.2 coal pulverizes equipment
3.1 coal dust pipeline
3.2 coal dust pipeline
3.3 coal dust pipeline
3.4 coal dust pipeline
4 separators
5 feed bins
6 coal dust turnouts
7.1 storage pipeline
7.2 storage pipeline
7.3 storage pipeline
7.4 storage pipeline
8 connecting lines
9.1 intake line
9.2 intake line
9.3 intake line
9.4 intake line
10 distributor gears
11 carry gas piping
12 carry gas blower
13 coal dust turnouts
14 vector gas-output pipe
15 charging gears
Claims (9)
1. one kind is used under the situation of the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network and improves the method for the dynamic property at coal fired power generation station; Wherein, The power station has rated power (RC) and utilizes the burner operation, and said burner comprises: at least one is used for the combustion chamber of combustion fuel; At least two coals with direct fired system pulverize equipment to be used to grind fuel; Wherein, Said coal pulverize equipment at least one have additional indirect-firing system; And the said indirect-firing system through having at least one feed bin and distributor gear is transported to said combustion chamber indirectly with coal dust; And other (a plurality of) coal pulverizes equipment and through said direct fired system coal dust is delivered directly to the combustion chamber, and wherein, under the situation that improves the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported in the network; The coal dust amount of carrying indirectly through feed bin and distributor gear improves with respect to instantaneous actual power or with respect to the coal dust amount of pulverizing the equipment conveying through (a plurality of) coal respectively; And at this, subsequent use coal dust is by sucking-off and be introduced in the said combustion chamber, and wherein in carrying feed bin; Under the situation that reduces the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported in the network; The coal dust amount of carrying indirectly through feed bin and distributor gear reduces with respect to instantaneous actual power or with respect to the coal dust amount of pulverizing the equipment conveying through (a plurality of) coal respectively, and at this, is stored in the said feed bin by the coal dust that pulverizes the excessive production of equipment.
2. method according to claim 1 is characterized in that said feed bin has storage volume (V
Sp); And in servicely utilizing coal powder filled pact half the aspect the volume in that said indirect-firing system is normal; Being used for subsequent use and under the situation that improves the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network, using, and the remaining storage volume that is used for holding and stores the coal dust of excessive production is used under the situation that reduces the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network.
3. method according to claim 1 is characterized in that, realizes the raising or the minimizing of the coal dust amount of conveying indirectly through the handling capacity that improves or reduce said distributor gear with the mode of regulating.
4. method according to claim 1 is characterized in that, when improving or reduce the coal dust amount of carrying indirectly, improves or reduce the volume flow of carrying gas blower with the mode of regulating.
5. according to claim 3 or 4 described methods; It is characterized in that; Through the coal fired power generation station require the piece power adjusting of influence by electrical network, to the raising of the handling capacity of said distributor gear or reduce, and/or the raising of the volume flow of said conveying gas blower or reduce is worked.
6. method according to claim 1 is characterized in that major requirement is through the signal activation of Long-distance Control.
7. method according to claim 1 is characterized in that less important requirement is through the signal activation of Long-distance Control.
8. method according to claim 1 is characterized in that, less important requirement activates through the written or oral indication of the power station being controlled personnel.
9. one kind is used under the situation of the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported to network and improves the assembly of the dynamic property at coal fired power generation station; Wherein, The power station has rated power (RC) and is configured with burner (1), and said burner (1) consists essentially of: at least one is used for the combustion chamber of combustion fuel; At least two coals with direct fired system pulverize equipment (2.1,2.2) to be used to grind fuel, wherein; Said coal pulverize equipment (2.1,2.2) at least one have additional indirect-firing system, and can coal dust be transported to said combustion chamber indirectly through said indirect-firing system with at least one feed bin (5) and distributor gear (10); And (a plurality of) coal at other pulverizes equipment (2.1; 2.2) in, can coal dust be delivered directly to said combustion chamber through said direct fired system, and wherein; Under the situation that improves the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported in the network; The coal dust amount that can carry indirectly through feed bin (5) and distributor gear (10) can be with respect to instantaneous actual power or with respect to can pulverizing the coal dust amount of equipment (2.1,2.2) conveying through (a plurality of) coal respectively and improve, and at this; Subsequent use coal dust can and can be introduced in the said combustion chamber by sucking-off in carrying feed bin (5); And wherein, under the situation that reduces the main and/or less important requirement that the power grid operation merchant is proposed to the electric current output that is transported in the network, can the coal dust amount of conveying can be with respect to instantaneous actual power perhaps with respect to pulverizing equipment (2.1 through (a plurality of) coal respectively indirectly with distributor gear (10) through feed bin (5); 2.2) the coal dust amount of carrying and reducing; And, can be stored in the said feed bin (5) by the coal dust that pulverizes the excessive production of equipment (2.1,2.2) at this.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009016191A DE102009016191B4 (en) | 2009-04-03 | 2009-04-03 | Method and arrangement for improving the dynamic behavior of a coal-fired power plant at primary and / or secondary requirements of the electricity grid operator to the power delivery to the grid |
| DE102009016191.0 | 2009-04-03 | ||
| PCT/DE2010/000323 WO2010115396A1 (en) | 2009-04-03 | 2010-03-19 | Method and assembly for improving the dynamic behavior of a coal-fired power plant for primary and/or secondary requirements of the power grid operator with respect to the current output into the grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102388267A true CN102388267A (en) | 2012-03-21 |
| CN102388267B CN102388267B (en) | 2014-05-07 |
Family
ID=42333293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080016884.XA Active CN102388267B (en) | 2009-04-03 | 2010-03-19 | Method and assembly for improving the dynamic behavior of a coal-fired power plant |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20120122042A1 (en) |
| EP (1) | EP2414731B1 (en) |
| CN (1) | CN102388267B (en) |
| DE (1) | DE102009016191B4 (en) |
| ES (1) | ES2597961T3 (en) |
| HR (1) | HRP20161325T1 (en) |
| HU (1) | HUE029851T2 (en) |
| PL (1) | PL2414731T3 (en) |
| WO (1) | WO2010115396A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201114894D0 (en) | 2011-08-30 | 2011-10-12 | Doosan Power Systems Ltd | Combustion apparatus |
| DE102011053656A1 (en) * | 2011-09-15 | 2013-03-21 | Hitachi Power Europe Gmbh | Method for operating a furnace of a coal-fired power plant |
| FR3016806B1 (en) * | 2014-01-28 | 2017-11-17 | Electricite De France | METHOD FOR REDUCING NOX EMISSIONS IN A CHARCOAL THERMAL POWER PLANT. |
| WO2016020559A1 (en) * | 2014-08-07 | 2016-02-11 | Inerco Ingeniería, Tecnología Y Consultoría, S.A. | System for optimizing the combustion for pulverized solid fuel boilers and boiler incorporating such system |
| DE102016201182A1 (en) | 2016-01-27 | 2017-07-27 | Siemens Aktiengesellschaft | Diaphragm pump with dust suction from below |
| DE102016216006A1 (en) | 2016-08-25 | 2018-03-01 | Siemens Aktiengesellschaft | Double membrane for a dust pump |
| DE102016216012A1 (en) | 2016-08-25 | 2018-03-01 | Siemens Aktiengesellschaft | Diaphragm pump with porous, curved aluminum filter |
| DE102016216016A1 (en) | 2016-08-25 | 2018-03-15 | Siemens Aktiengesellschaft | Production of a porous aluminum filter for a membrane pump |
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- 2010-03-19 PL PL10718437T patent/PL2414731T3/en unknown
- 2010-03-19 US US13/262,391 patent/US20120122042A1/en not_active Abandoned
- 2010-03-19 WO PCT/DE2010/000323 patent/WO2010115396A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2414731B1 (en) | 2016-07-13 |
| CN102388267B (en) | 2014-05-07 |
| PL2414731T3 (en) | 2017-08-31 |
| DE102009016191B4 (en) | 2013-04-04 |
| HRP20161325T1 (en) | 2016-11-18 |
| WO2010115396A1 (en) | 2010-10-14 |
| US20120122042A1 (en) | 2012-05-17 |
| HUE029851T2 (en) | 2017-04-28 |
| DE102009016191A1 (en) | 2010-10-07 |
| EP2414731A1 (en) | 2012-02-08 |
| ES2597961T3 (en) | 2017-01-24 |
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