CN109114548A - Coal control method is given in the burning of supercritical circulating fluidized bed boiler - Google Patents
Coal control method is given in the burning of supercritical circulating fluidized bed boiler Download PDFInfo
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- CN109114548A CN109114548A CN201811051420.7A CN201811051420A CN109114548A CN 109114548 A CN109114548 A CN 109114548A CN 201811051420 A CN201811051420 A CN 201811051420A CN 109114548 A CN109114548 A CN 109114548A
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- coal
- boiler
- amount
- seam
- energy
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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
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
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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
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
The invention discloses a kind of burnings of supercritical circulating fluidized bed boiler to give coal control method.Wherein, this method comprises: obtaining total fuel quantity energy that boiler needs according to the input instruction of boiler, wherein the load of the indicated boiler of input instruction can match with total fuel quantity；Obtain the natural fuel amount energy that boiler currently exports；According to the amount between total fuel quantity energy and practical total fuel quantity energy can difference determine coal amount that boiler needs, wherein the energy and amount energy difference that the coal amount burning that boiler needs generates match；The coal supply system for controlling boiler provides the coal amount that boiler needs to boiler.The present invention is solved to the technical problem of coal control inaccuracy.
Description
Technical field
The present invention relates to automation field, the burning in particular to a kind of supercritical circulating fluidized bed boiler is given
Coal control method.
Background technique
Compared with pulverized-coal fired boiler, although CFB technique development time is shorter, show that its is excellent in technology commercialization process
Good environmental emission characteristic, cost of polluting control are that current other technologies can not be equal to.
With the rapid development of the national economy, the installed capacity of domestic thermal power generation has entered supercritical parameter comprehensively when
In generation, requires large circulating fluidized bed boiler parameter also to enter the overcritical epoch therewith, otherwise hardly enters the master of thermal power generation
Flow unit ranks.Supercritical unit refers to that superheater outlet main steam pressure is more than 22.129MPa.The overcritical machine run at present
Group operating pressure is 24MPa-25MPa.Since supercritical once-through boiler does not have drum, start and stop speed is fast, and general subcritical
Drum boiler is compared, and supercritical once-through boiler starts to oepration at full load, and varying duty speed can be improved 1 times or so.It is sub- with same capacity
The thermal efficiency of critical fired power generating unit is compared, and efficiency 2%-2.5% theoretically can be improved using supercritical parameter.Supercritical generating
Unit is lower than the coal consumption for power generation of subcritical generating set, and environment-friendly advantage also becomes apparent.
Supercritical circulating fluidized bed technology combines recirculating fluidized bed and overcritical two kinds of mature technologies, and super in conjunction with after faces
Boundary's Technology of Circulating Fluidized Bed Boiler (SCCFB) has had both the advantages of CFB combustion technology and overcritical (SC) steam circulation, overcritical
Circulating fluidized bed boiler is as next-generation Combustion technology of circulating fluidized, and due to available higher power supply efficiency, flue gas is net
The initial cost and operating cost lower than flue gas desulfurization 50% or more for changing (desulphurization and denitration), are a kind of suitable for the efficient of large-scale popularization
Clean Coal Power Generating Technologies, business application market future are very bright.
However since Supercritical CFB Boiler is different from the working principle of conventional Supercritical coal-powder boiler, especially overcritical CFB
The particular form and mechanism of boiler combustion, Supercritical CFB Boiler is in feeding system, the dynamic characteristic of combustion process, coupling condition
And there are greatest differences with overcritical coal-powder boiler for control mode and requirement etc., therefore how by coal-supplying amount, first and second
The main vapour pressure of Supercritical CFB Boiler is controlled in the adjusting of air quantity, and the important parameter such as bed temperature and bed pressure maintains under certain load
The balance of boiler output and input between energy, the important topic that Supercritical CFB Boiler burns to the research of coal control strategy.
For above-mentioned problem, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides a kind of burnings of supercritical circulating fluidized bed boiler to give coal control method, at least to solve
Certainly to the technical problem of coal control inaccuracy.
According to an aspect of an embodiment of the present invention, coal control is given in the burning for providing a kind of supercritical circulating fluidized bed boiler
Method processed, comprising: total fuel quantity energy that the boiler needs is obtained according to the input instruction of the boiler, wherein the input
The load of the indicated boiler of instruction can match with total fuel quantity；Obtain the practical combustion that the boiler currently exports
Doses energy；The coal that poor can be determined the boiler according to the amount between total fuel quantity energy and the total fuel quantity energy of the reality and need
Amount, wherein the energy that the coal amount burning that the boiler needs generates matches with the amount energy difference；Control the boiler to coal
System provides the coal amount that the boiler needs to the boiler.
Further, the coal supply system for controlling the boiler provides the coal amount that the boiler needs to the boiler and includes:
According to the coal amount that the boiler needs adjust the coal supply system of the boiler to coal rate；Control the coal supply system of the boiler
The coal amount that the boiler needs is provided to the boiler to coal rate according to described.
It further, can the determining pot of difference according to the amount between total fuel quantity energy and the total fuel quantity energy of the reality
The coal amount that furnace needs includes: the total fuel quantity needed according to the boiler can be with the difference meter of the natural fuel amount energy of the boiler
Calculation obtains the amount can be poor；The burning of coal characteristic provided to the boiler is provided；According to the combustion characteristics to the amount energy
Difference is corrected to obtain the coal amount that the boiler needs.
Further, the amount poor can be corrected according to the combustion characteristics to obtain the coal amount packet of the boiler needs
It includes: according to the accumulation of heat flow characteristic of the fever flow characteristic of the coal, the storage carbon characteristic of the coal and the boiler to the amount energy
Difference is corrected, and obtains the coal amount that the boiler needs.
Further, the coal supply system includes a plurality of to seam, controls the coal supply system of the boiler to the boiler
There is provided the coal amount that the boiler needs includes: to obtain a plurality of coal amount distribution coefficient to described in every in seam to seam；According to
Coal amount distribution coefficient described in coal amount that the boiler needs and every to seam obtain every described in seam coal-supplying amount；Control
Make the coal supply system of the boiler according to described in every to the coal-supplying amount of seam to described in every to seam to coal.
Further, control the coal supply system of the boiler according to described in every to the coal-supplying amount of seam to described in every to
Seam includes: that acquisition is described to the practical actual amount to coal of seam and the corresponding coal-supplying amount to seam to coal；Coal is given according to described
The adjusting of the difference of the coal-supplying amount of line and the actual amount to seam is described to give coal rate to seam, wherein after adjusting
It is consistent with the coal-supplying amount to coal amount provided by coal rate.
Further, it is adjusted according to the difference of the coal-supplying amount to seam and the actual amount to seam described to coal
Line includes: the acquisition boiler to air quantity and confluent to coal rate；Air quantity and water supply meter are given according to the boiler
Calculate maximum allowable coal-supplying amount；According to the maximum allowable coal-supplying amount and the difference to described every to seam to coal rate into
Row adjustment, wherein the summation of a plurality of coal-supplying amount to seam is less than or equal to the maximum allowable coal-supplying amount.
Other side according to an embodiment of the present invention provides a kind of burning of supercritical circulating fluidized bed boiler to coal
Control device, comprising: first acquisition unit obtains total fuel that the boiler needs for the input instruction according to the boiler
Amount can, wherein the load of the indicated boiler of the input instruction can match with total fuel quantity；Second obtains list
Member, the natural fuel amount energy currently exported for obtaining the boiler；Determination unit, for according to total fuel quantity energy and institute
State the coal amount that the amount between practical total fuel quantity energy poor can determine the boiler and need, wherein the coal amount combustion that the boiler needs
The energy generated is burnt to match with the amount energy difference；Control unit, for controlling the coal supply system of the boiler to the boiler
The coal amount that the boiler needs is provided.
Further, described control unit includes: regulator unit, and the coal amount for being needed according to the boiler adjusts institute
State the coal supply system of boiler to coal rate；First control subelement, for controlling the coal supply system of the boiler according to described
The coal amount that the boiler needs is provided to the boiler to coal rate.
Further, the determination unit includes: computation subunit, total fuel quantity energy for being needed according to the boiler
The amount is calculated with the difference of the natural fuel amount energy of the boiler can be poor；First obtains subelement, for obtaining to institute
The burning of coal characteristic of boiler offer is provided；Correction module, for being corrected according to the combustion characteristics to the amount energy difference
The coal amount needed to the boiler.
Further, the correction subelement includes: correction module, for according to the fever flow characteristic of the coal, described
The storage carbon characteristic of coal and the accumulation of heat flow characteristic of the boiler are corrected the amount energy difference, obtain the coal that the boiler needs
Amount.
Further, the coal supply system includes a plurality of to seam, and described control unit includes: the second acquisition subelement,
For obtaining a plurality of coal amount distribution coefficient to described in every in seam to seam；Third obtains subelement, for according to
Boiler need coal amount and every described in seam coal amount distribution coefficient obtain every described in give seam coal-supplying amount；Second control
Subunit, for control the coal supply system of the boiler according to described in every to the coal-supplying amount of seam to described in every to seam
To coal.
Further, the second control subelement includes: acquisition module, described practical to coal to seam for obtaining
Actual amount；Adjustment module, for according to the difference adjusting of the coal-supplying amount to seam and the actual amount to seam
Coal rate is given to seam, wherein according to consistent with the coal-supplying amount to coal amount provided by coal rate after adjusting.
Further, the adjustment module includes: acquisition submodule, for obtain the boiler to air quantity and water supply
Amount；Computational submodule, for calculating maximum allowable coal-supplying amount to air quantity and confluent according to the boiler；Submodule is adjusted,
For according to the maximum allowable coal-supplying amount and the difference to described every being adjusted to coal rate to seam, wherein
The summation of a plurality of coal-supplying amount to seam is less than or equal to the maximum allowable coal-supplying amount.
In embodiments of the present invention, total fuel quantity energy that boiler needs is obtained using the input instruction according to boiler；It obtains
The natural fuel amount energy that boiler currently exports；It can the determining boiler of difference according to the amount between total fuel quantity energy and practical total fuel quantity energy
The mode of the coal amount needed, the coal supply system by controlling boiler provide the coal amount that boiler needs to boiler, have reached certain negative
Boiler outputs and inputs the purpose of energy balance under lotus, to realize to the technical effect of coal precise control, and then solves
To the technical problem of coal control inaccuracy.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is process of the burning to coal control method of supercritical circulating fluidized bed boiler according to an embodiment of the present invention
Figure；
Fig. 2 is the schematic diagram of 600MW supercritical circulating fluidized bed boiler coal supply system according to an embodiment of the present invention；
Fig. 3 is that coal supply system according to an embodiment of the present invention controls method flow diagram to seam to coal；
Fig. 4 is that coal supply system according to an embodiment of the present invention controls method flow diagram to seam to coal rate；
Fig. 5 is signal of the burning to coal control device of supercritical circulating fluidized bed boiler according to an embodiment of the present invention
Figure.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
According to embodiments of the present invention, a kind of side of the burning to coal control method of supercritical circulating fluidized bed boiler is provided
Method embodiment, it should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
Computer system in execute, although also, logical order is shown in flow charts, in some cases, can be with
Shown or described step is executed different from sequence herein.
Fig. 1 is process of the burning to coal control method of supercritical circulating fluidized bed boiler according to an embodiment of the present invention
Figure, as shown in Figure 1, this method comprises the following steps:
Step S102 obtains total fuel quantity energy that the boiler needs according to the input instruction of the boiler, wherein described
The load of the indicated boiler of input instruction can match with total fuel quantity.
The input instruction for obtaining boiler obtains total fuel quantity energy that boiler needs according to the input instruction of boiler, boiler
Input instruction includes that the load control order of boiler and main vapour pressure instruction, load control order indicate that boiler is to be achieved
Load value, main vapour pressure indicate the main vapour pressure of boiler, can be counted according to load control order and main vapour pressure instruction
Output energy when boiler maintains load and main vapour pressure indicated by load control order and main vapour pressure instruction is calculated, to be made
Boiler maintains above-mentioned load and main vapour pressure, and the input energy of boiler should be equal with output energy, therefore boiler needs is total
Fuel quantity can be i.e. equal to the output energy of boiler.
Step S104 obtains the natural fuel amount energy that the boiler currently exports.
Step S106, can the determining pot of difference according to the amount between total fuel quantity energy and the total fuel quantity energy of the reality
The coal amount that furnace needs, wherein the energy that the coal amount burning that the boiler needs generates matches with the amount energy difference.
Obtain the currently practical fuel quantity energy of boiler, the load and main vapour pressure that amount energy can be currently practical by boiler
It is calculated, total fuel quantity that boiler needs can be the fuel quantity energy that boiler currently lacks, this portion with the difference of natural fuel amount energy
Component can be needed to increase to boiler by providing to coal to boiler to coal, the amount energy that increased coal-supplying amount burning generates
Can be equal with fuel quantity that boiler currently lacks, increase to boiler above-mentioned coal amount to coal after, boiler natural fuel amount can be with
Total fuel quantity that boiler needs can be equal.
Step S108, the coal supply system for controlling the boiler provide the coal amount that the boiler needs to the boiler.
In embodiments of the present invention, total fuel quantity energy that boiler needs is obtained using the input instruction according to boiler；It obtains
The natural fuel amount energy that boiler currently exports；It can the determining boiler of difference according to the amount between total fuel quantity energy and practical total fuel quantity energy
The mode of the coal amount needed, the coal supply system by controlling boiler provide the coal amount that boiler needs to boiler, have reached certain negative
Boiler outputs and inputs the purpose of energy balance under lotus, to realize to the technical effect of coal precise control, and then solves
To the technical problem of coal control inaccuracy.
Optionally, it includes: root that the coal supply system for controlling the boiler, which provides the coal amount that the boiler needs to the boiler,
According to the coal amount that the boiler needs adjust the coal supply system of the boiler to coal rate；The coal supply system for controlling the boiler is pressed
The coal amount that the boiler needs is provided to the boiler to coal rate according to described.
The coal supply system of boiler is responsible for boiler coal feeding, and coal supply system determines the size of coal-supplying amount to the rate of coal,
Faster to the rate of coal, coal supply system is more to boiler coal feeding, otherwise slower to coal rate, and coal supply system is got over to boiler coal feeding
It is few, coal rate is given according to the coal amount adjusting boiler coal feeding system of boiler needs, makes coal-supplying amount and pot of the coal supply system to boiler
The coal amount that furnace needs is equal.
It optionally, can the determining boiler need of difference according to the amount between total fuel quantity energy and the natural fuel amount energy
The coal amount wanted includes: that the total fuel quantity needed according to the boiler can be calculated with the difference of the natural fuel amount energy of the boiler
It can be poor to the amount；The burning of coal characteristic provided to the boiler is provided；According to the combustion characteristics to the amount can difference into
Row correction obtains the coal amount that the boiler needs.
Optionally, the amount poor can be corrected according to the combustion characteristics to obtain the coal amount packet of the boiler needs
It includes: according to the accumulation of heat flow characteristic of the fever flow characteristic of the coal, the storage carbon characteristic of the coal and the boiler to the amount energy
Difference is corrected, and obtains the coal amount that the boiler needs.
The size of fuel mass determine boiler obtain energy number, however the amount energy that boiler is obtained in fuel combustion
Other than the size of the fuel mass with boiler has direct relation, the burning for also suffering from fuel and boiler about the fuel is special
Property influence, for example, to the coal of different qualities, the heat that the coal under phase homogenous quantities is generated through burning is different；For another example by
Different in the accumulation of heat flow characteristic of different boilers, when the coal of same quality is through burning, the amount that different boilers obtain can be also different
's.Therefore, the coal that the amount between the total fuel quantity energy needed according to boiler and natural fuel amount energy poor can calculate boiler and need
When amount, the quality and boiler that also obtain the coal provided to boiler are about this kind of burning of coal characteristic, according to the quality and combustion of coal
Characteristic is burnt to be corrected the coal amount that boiler needs, comprising: according to the characteristic of the calorific value of coal and storage carbon characteristic to coal amount into
Row correction, is corrected coal amount according to the accumulation of heat flow characteristic of boiler.
Optionally, the coal supply system includes a plurality of to seam, and the coal supply system for controlling the boiler is mentioned to the boiler
The coal amount needed for the boiler includes: to obtain a plurality of coal amount distribution coefficient to described in every in seam to seam；According to institute
State boiler needs coal amount and every described in seam coal amount distribution coefficient obtain every described in give seam coal-supplying amount；Control
The coal supply system of the boiler according to described in every give seam coal-supplying amount to described in every to seam to coal.
The coal supply system of boiler has generally comprised a plurality of to seam, is given to boiler coal feeding to different by a plurality of to seam
Seam setting distribution coefficient obtains difference to seam when the coal supply system for controlling boiler provides the coal amount needed to boiler
Distribution coefficient calculates each item to the coal-supplying amount of seam, according to each item to seam according to the coal meter that distribution coefficient and boiler need
Limestone control this to seam to coal.
By taking 600MW supercritical circulating fluidized bed boiler as an example, the coal supply system of the boiler is as shown in Fig. 2, the coal supply system
It adopts and returns to the form that burner hearth feeding point combines with external bed to coal point with material returning device, Fig. 2 is according to an embodiment of the present invention
The schematic diagram of 600MW supercritical circulating fluidized bed boiler coal supply system is disposed with 12 altogether and respectively gives coal point, is arranged in six and returns
On glassware to the returning charge leg of burner hearth and six external heat exchangers to the returning charge leg of burner hearth.Coal supply system sets A, B, C, D totally four
To seam, wherein A, B are arranged on the right side of burner hearth to seam, and C, D are arranged on the left of burner hearth to seam.B, C is to seam from material returning device
Feed back leg to burner hearth enters burner hearth, and A, D return grey-way from external bed to burner hearth to seam and enter burner hearth.In coal supply system to coal
In the process, first group is set by AB seam, CD seam is set as second group, and Fig. 3 is according to an embodiment of the present invention to coal measures
System is controlled to seam to the method flow diagram of coal, as shown in figure 3, getting feeder coal-supplying amount (i.e. the coal amounts of boiler needs)
And according to feeder coal-supplying amount generate control instruction after, through giving coal balance control, according to the distribution system of AB seam and CD seam
Number, distributes to AB seam and CD seam for feeder coal-supplying amount；AB seam coal amount is generated according to the coal-supplying amount that AB seam is assigned to
Instruction, the instruction of AB seam coal amount after the operation of PID arithmetic 1, are balanced to coal using AB and are controlled with the practical coal amount of AB seam,
By AB A seam and B coal will be distributed to AB seam coal-supplying amount according to the distribution coefficient of A seam and B seam to coal balance control
The coal amount that the coal amount and B seam that line, A seam and B seam are assigned to according to A seam are assigned to generates the instruction of A seam coal amount respectively
It is instructed with B seam coal amount, the instruction of A seam coal amount is for controlling coal amount that A seam is assigned to according to A seam to coal, B seam coal amount
It instructs for controlling coal amount that B seam is assigned to according to B seam to coal.
Optionally, control the coal supply system of the boiler according to described in every to the coal-supplying amount of seam to described in every to coal
Line, which includes: that acquisition is described to coal, gives seam the practical actual amount to coal；According to the coal-supplying amount to seam and it is described give seam
Actual amount difference adjust it is described to seam to coal rate, wherein according to after adjusting to coal amount provided by coal rate
It is consistent with the coal-supplying amount.
According to the Limestone control to seam to seam to coal when, the practical coal-supplying amount to seam will appear certain inclined
Difference causes to control the amount inaccuracy to seam to boiler coal feeding and obtains to guarantee accuracy to the practical coal-supplying amount of seam,
According to the coal-supplying amount being assigned to seam with the difference to the practical coal-supplying amount of seam the adjusting to coal rate to seam to this
Section, make this to seam practical coal-supplying amount and distribution to coal facies etc..
Fig. 4 is that coal supply system according to an embodiment of the present invention controls method flow diagram to seam to coal rate, such as Fig. 4 institute
Show, the control of feeder coal amount is controlled by balancing to coal, the coal for needing boiler according to the distribution coefficient of AB seam and CD seam
Amount gives AB seam and CD seam, and generates the instruction of AB seam coal amount and the instruction of CD seam coal amount, AB seam coal amount instruction warp
It crosses AB seam to balance to coal, according to the distribution coefficient of A seam and B seam, the coal amount of AB seam is assigned to A seam and B seam,
And generate the instruction of A seam coal amount and the instruction of B seam coal amount.A seam feeder includes A center feeder, A weighing belt coal feeder
With A Scraper, A seam coal amount instruction control A weighing belt coal feeder by given pace transmission, while control A scraper plate to
Coal machine scrapes coal by given pace, and A center feeder is rotated according to given pace to coal, the wherein transmission of A weighing belt coal feeder
Rate and the rotation for scraping coal rate and A center feeder of A carbon scraper match to coal rate, A weighing belt coal feeder
Transmission rate and the relationship for scraping coal rate of A carbon scraper can be expressed as function F (x) 1, the transmission speed of A weighing belt coal feeder
The rotation of rate and A center feeder can be expressed as F (x) 5 to the relationship of coal rate；According to A weighing belt coal feeder flow and
The available current A of revolving speed gives seam the practical actual amount for giving coal, according to the difference of the coal-supplying amount of A seam and the actual amount of A seam
Value adjusting A seam gives coal rate to reduce A coal that is, if the practical coal-supplying amount of A seam is greater than the coal-supplying amount that A seam is assigned to
Line gives coal rate, and then reduces the coal-supplying amount of A seam；If the practical coal-supplying amount of A seam be less than that A seam is assigned to coal
Amount, then improve A seam to coal rate, and then improve the coal-supplying amount of A seam.The control of B seam, C seam and D seam is to coal side
Formula is identical as A seam.
Optionally, it is adjusted according to the difference of the coal-supplying amount to seam and the actual amount to seam described to seam
To coal rate include: obtain the boiler to air quantity and confluent；According to being calculated to air quantity and confluent for the boiler
Maximum allowable coal-supplying amount；Described every is carried out to seam to coal rate according to the maximum allowable coal-supplying amount and the difference
It adjusts, wherein the summation of a plurality of coal-supplying amount to seam is less than or equal to the maximum allowable coal-supplying amount.
It needs to provide certain air quantity simultaneously in coal combustion process in the boiler, to support burning of coal, if air quantity
Deficiency, coal combustion is insufficient, and the heat of generation also can be insufficient, while the phenomenon that also occur that rich coal coking；In addition, it is necessary to pot
Furnace provides a certain amount of water, and the heat that coal combustion generates makes water become steam, so that main vapour pressure is provided for boiler, if water
Deficiency, the heat that coal is generated through burning can not be completely converted into as main vapour pressure, and water shortage causes boiler overheating can also
It causes danger.Therefore, during to boiler coal feeding, according to boiler to calculate boiler to air quantity and confluent maximum allowable
Coal-supplying amount, each item cannot be greater than boiler to the permitted maximum of air quantity and confluent to coal to the summation of boiler coal feeding amount to seam
Amount.
Another aspect according to an embodiment of the present invention, additionally provides a kind of burning of supercritical circulating fluidized bed boiler
Coal control device is given, Fig. 5 is that coal control device is given in the burning of supercritical circulating fluidized bed boiler according to an embodiment of the present invention
Schematic diagram, as shown in figure 5, the device mainly includes:
First acquisition unit 501 obtains total fuel quantity that the boiler needs for the input instruction according to the boiler
It can, wherein the load of the indicated boiler of the input instruction can match with total fuel quantity.
First acquisition unit 501 obtains the input instruction of boiler, is needed according to the input instruction acquisition boiler of boiler total
Fuel quantity energy, the input instruction of boiler include load control order and the main vapour pressure instruction of boiler, load control order instruction
Boiler load value to be achieved out, main vapour pressure indicates the main vapour pressure of boiler, according to load control order and master
Steam pressure instruction can calculate boiler and maintain load and main vapour pressure indicated by load control order and main vapour pressure instruction
When output energy, so that boiler is maintained above-mentioned load and main vapour pressure, the input energy of boiler with export energy should be equal,
Therefore total fuel quantity that boiler needs can be i.e. equal to the output energy of boiler.
Second acquisition unit 502, the natural fuel amount energy currently exported for obtaining the boiler.
Determination unit 503, for true according to the amount energy difference between total fuel quantity energy and the total fuel quantity energy of the reality
The coal amount that the fixed boiler needs, wherein the energy that the coal amount burning that the boiler needs generates matches with the amount energy difference.
Second acquisition unit 502 obtains the currently practical fuel quantity energy of boiler, and amount energy can be currently practical by boiler
Load and main vapour pressure be calculated, total fuel quantity that determination unit 503 is needed according to boiler can with natural fuel amount can
Difference determines the fuel quantity energy that boiler currently lacks, this partial amount can be by providing to coal to boiler, i.e., by boiler
Increase to coal, the fuel quantity that the amount that increased coal-supplying amount burning generates can currently lack with boiler can be equal, makes the practical combustion of boiler
Doses can be equal with total fuel quantity energy that boiler needs.
Control unit 504, the coal supply system for controlling the boiler provide the coal that the boiler needs to the boiler
Amount.
In embodiments of the present invention, total fuel quantity energy that boiler needs is obtained using the input instruction according to boiler；It obtains
The natural fuel amount energy that boiler currently exports；It can the determining boiler of difference according to the amount between total fuel quantity energy and practical total fuel quantity energy
The mode of the coal amount needed, the coal supply system by controlling boiler provide the coal amount that boiler needs to boiler, have reached certain negative
Boiler outputs and inputs the purpose of energy balance under lotus, to realize to the technical effect of coal precise control, and then solves
To the technical problem of coal control inaccuracy.
Optionally, described control unit includes: regulator unit, described in the coal amount adjusting for being needed according to the boiler
The coal supply system of boiler gives coal rate；First control subelement, for control the coal supply system of the boiler according to it is described to
Coal rate provides the coal amount that the boiler needs to the boiler.
The coal supply system of boiler is responsible for boiler coal feeding, and coal supply system determines the size of coal-supplying amount to the rate of coal,
Faster to the rate of coal, coal supply system is more to boiler coal feeding, otherwise slower to coal rate, and coal supply system is got over to boiler coal feeding
It is few, coal rate is given according to the coal amount adjusting boiler coal feeding system of boiler needs, makes coal-supplying amount and pot of the coal supply system to boiler
The coal amount that furnace needs is equal.
Optionally, the determination unit includes: computation subunit, total fuel quantity for being needed according to the boiler can and
The amount is calculated in the difference of the natural fuel amount energy of the boiler can be poor；First obtains subelement, for obtaining to described
The burning of coal characteristic that boiler provides；Subelement is corrected, for being corrected according to the combustion characteristics to the amount energy difference
The coal amount needed to the boiler.
Optionally, the correction subelement includes: correction module, for fever flow characteristic, the coal according to the coal
Storage carbon characteristic and the accumulation of heat flow characteristic of the boiler amount energy difference is corrected, obtain the coal that the boiler needs
Amount.
The size of fuel mass determine boiler obtain energy number, however the amount energy that boiler is obtained in fuel combustion
Other than the size of the fuel mass with boiler has direct relation, the burning for also suffering from fuel and boiler about the fuel is special
Property influence, for example, to the coal of different qualities, the heat that the coal under phase homogenous quantities is generated through burning is different；For another example by
Different in the accumulation of heat flow characteristic of different boilers, when the coal of same quality is through burning, the amount that different boilers obtain can be also different
's.Therefore, the coal that the amount between the total fuel quantity energy needed according to boiler and natural fuel amount energy poor can calculate boiler and need
When amount, the quality and boiler that also obtain the coal provided to boiler are about this kind of burning of coal characteristic, according to the quality and combustion of coal
The coal amount that burning characteristic needs boiler is corrected, comprising: is carried out according to the characteristic of the calorific value of coal and storage carbon characteristic to coal amount
Correction, is corrected coal amount according to the accumulation of heat flow characteristic of boiler.
Optionally, the coal supply system includes a plurality of to seam, and described control unit includes: the second acquisition module, is used for
Obtain a plurality of coal amount distribution coefficient to described in every in seam to seam；Third obtains subelement, for according to the boiler
Coal amount distribution coefficient described in the coal amount needed and every to seam obtain every described in seam coal-supplying amount；Second control
Unit, for control the coal supply system of the boiler according to described in every to the coal-supplying amount of seam to described in every to seam to
Coal.
The coal supply system of boiler has generally comprised a plurality of to seam, is given to boiler coal feeding to different by a plurality of to seam
Seam setting distribution coefficient obtains difference to seam when the coal supply system for controlling boiler provides the coal amount needed to boiler
Distribution coefficient calculates each item to the coal-supplying amount of seam, according to each item to seam according to the coal meter that distribution coefficient and boiler need
Limestone control this to seam to coal.
As shown in figure 3, coal supply system includes 4 to seam, first group is set by AB seam, CD seam is set as second
Group, get feeder coal-supplying amount (i.e. boiler need coal amounts) and according to control instruction is generated at feeder coal-supplying amount after,
It is controlled by being balanced to coal, according to the distribution coefficient of AB seam and CD seam, feeder coal-supplying amount is distributed into AB seam and CD
Seam；The instruction of AB seam coal amount, the instruction of AB seam coal amount and the practical coal of AB seam are generated according to the coal-supplying amount that AB seam is assigned to
Amount is balanced to coal using AB and is controlled after the operation of PID1 operation 1, by AB to coal balance control according to A seam and B seam
Distribution coefficient, A seam and B seam, the coal that A seam and B seam are assigned to according to A seam will be distributed to AB seam coal-supplying amount
The coal amount that amount and B seam are assigned to generates the instruction of A seam coal amount and the instruction of B seam coal amount respectively, and A seam coal amount is instructed for controlling
To coal, the instruction of B seam coal amount is assigned to for controlling B seam according to B seam the coal amount that A seam processed is assigned to according to A seam
Coal amount is to coal.
Optionally, the second control subelement includes: acquisition module, described gives seam the practical reality to coal for obtaining
Border amount；Adjustment module, for being given according to the difference adjusting of the coal-supplying amount to seam and the actual amount to seam
Seam gives coal rate, wherein according to consistent with the coal-supplying amount to coal amount provided by coal rate after adjusting.
According to the Limestone control to seam to seam to coal when, the practical coal-supplying amount to seam will appear certain inclined
Difference causes the amount inaccuracy controlled to seam to lock furnace to coal to obtain to guarantee accuracy to the practical coal-supplying amount of seam,
According to the coal-supplying amount being assigned to seam with the difference to the practical coal-supplying amount of seam the adjusting to coal rate to seam to this
Section, make this to seam practical coal-supplying amount and distribution to coal facies etc..
As shown in figure 4, the control of feeder coal amount is controlled by balancing to coal, according to the distribution coefficient of AB seam and CD seam
The coal amount that boiler needs is given into AB seam and CD seam, and generates the instruction of AB seam coal amount and the instruction of CD seam coal amount, AB
The instruction of seam coal amount is balanced by AB seam to coal, and according to the distribution coefficient of A seam and B seam, the coal amount of AB seam is distributed
To A seam and B seam, and generate the instruction of A seam coal amount and the instruction of B seam coal amount.A seam feeder include A center feeder,
A weighing belt coal feeder and A Scraper, A seam coal amount instruction control A weighing belt coal feeder are driven by given pace,
A Scraper is controlled simultaneously and scrapes coal by given pace, and A center feeder is rotated according to given pace to coal, and wherein A weighs skin
Transmission rate with feeder and the rotation for scraping coal rate and A center feeder of A carbon scraper match to coal rate, and A claims
The transmission rate of weight belt coal-feeding machine and the relationship for scraping coal rate of A carbon scraper can be expressed as function F (x) 1, A belt of weighing
The transmission rate of feeder and the rotation of A center feeder can be expressed as F (x) 5 to the relationship of coal rate；According to A weighing skin
Give seam the practical actual amount for giving coal with the available current A of feeder flow and revolving speed, according to the coal-supplying amount of A seam and A coal
The difference of the actual amount of line adjust A seam to coal rate, i.e., if the practical coal-supplying amount of A seam be greater than that A seam is assigned to
Coal amount, then reduce A seam to coal rate, and then reduce the coal-supplying amount of A seam；If the practical coal-supplying amount of A seam is less than A seam
The coal-supplying amount being assigned to, then improve A seam to coal rate, and then improve the coal-supplying amount of A seam.B seam, C seam and D seam
Control coal-feeding mode it is identical as A seam.
Optionally, the adjustment module includes: acquisition submodule, for obtain the boiler to air quantity and confluent；
Computational submodule, for calculating maximum allowable coal-supplying amount to air quantity and confluent according to the boiler；Submodule is adjusted, is used for
According to the maximum allowable coal-supplying amount and the difference to described every being adjusted to coal rate to seam, wherein described
The summation of a plurality of coal-supplying amount to seam is less than or equal to the maximum allowable coal-supplying amount.
It needs to provide certain air quantity simultaneously in coal combustion process in the boiler, to support burning of coal, if air quantity
Deficiency, coal combustion is insufficient, and the heat of generation also can be insufficient, while the phenomenon that also occur that rich coal coking；In addition, it is necessary to pot
Furnace provides a certain amount of water, and the heat that coal combustion generates makes water become steam, so that main vapour pressure is provided for boiler, if water
Deficiency, the heat that coal is generated through burning can not be completely converted into as main vapour pressure, and water shortage causes boiler overheating can also
It causes danger.Therefore, during to boiler coal feeding, according to boiler to calculate boiler to air quantity and confluent maximum allowable
Coal-supplying amount, each item cannot be greater than boiler to the permitted maximum of air quantity and confluent to coal to the summation of boiler coal feeding amount to seam
Amount.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (14)
1. coal control method is given in a kind of burning of supercritical circulating fluidized bed boiler characterized by comprising
Total fuel quantity energy that the boiler needs is obtained according to the input instruction of the boiler, wherein the input instruction is signified
The load of the boiler shown can match with total fuel quantity；
Obtain the natural fuel amount energy that the boiler currently exports；
The coal amount of the boiler needs poor can be determined according to the amount between total fuel quantity energy and the total fuel quantity energy of the reality,
Wherein, the energy that the coal amount burning that the boiler needs generates matches with the amount energy difference；
The coal supply system for controlling the boiler provides the coal amount that the boiler needs to the boiler.
2. the method according to claim 1, wherein the coal supply system for controlling the boiler is provided to the boiler
The coal amount that the boiler needs includes:
According to the coal amount that the boiler needs adjust the coal supply system of the boiler to coal rate；
The coal supply system for controlling the boiler provides the coal amount that the boiler needs to the boiler to coal rate according to described.
3. the method according to claim 1, wherein can be with the natural fuel amount energy according to total fuel quantity
Between amount can the difference coal amount that determines that the boiler needs include:
The amount can be calculated with the difference of the natural fuel amount energy of the boiler in the total fuel quantity needed according to the boiler
It can be poor；
The burning of coal characteristic provided to the boiler is provided；
The amount poor can be corrected according to the combustion characteristics to obtain the coal amount of the boiler needs.
4. according to the method described in claim 3, it is characterized in that, being corrected according to the combustion characteristics to the amount energy difference
Obtaining the coal amount that the boiler needs includes:
According to the accumulation of heat flow characteristic of the fever flow characteristic of the coal, the storage carbon characteristic of the coal and the boiler to the amount energy
Difference is corrected, and obtains the coal amount that the boiler needs.
5. the method according to claim 1, wherein the coal supply system includes a plurality of to seam, described in control
The coal supply system of boiler provides the coal amount that the boiler needs to the boiler
Obtain a plurality of coal amount distribution coefficient to described in every in seam to seam；
Coal amount distribution coefficient described in the coal amount needed according to the boiler and every to seam obtain every described in seam
Coal-supplying amount；
Control the coal supply system of the boiler according to described in every to the coal-supplying amount of seam to described in every to seam to coal.
6. according to the method described in claim 5, it is characterized in that, control the coal supply system of the boiler according to described in every to
The coal-supplying amount of seam includes: to coal to seam to described in every
Give seam the practical actual amount for giving coal described in obtaining；
Coal rate is given to seam according to the adjusting of the difference of the coal-supplying amount to seam and the actual amount to seam is described,
Wherein, consistent with the coal-supplying amount to coal amount provided by coal rate according to adjusted.
7. according to the method described in claim 6, it is characterized in that, according to the coal-supplying amount to seam and described to seam
The difference adjusting of actual amount is described to include: to coal rate to seam
Obtain the boiler to air quantity and confluent；
Maximum allowable coal-supplying amount is calculated to air quantity and confluent according to the boiler；
According to the maximum allowable coal-supplying amount and the difference to described every being adjusted to coal rate to seam, wherein
The summation of a plurality of coal-supplying amount to seam is less than or equal to the maximum allowable coal-supplying amount.
8. coal control device is given in a kind of burning of supercritical circulating fluidized bed boiler characterized by comprising first obtains list
Member obtains total fuel quantity energy that the boiler needs for the input instruction according to the boiler, wherein the input instructs institute
The load of the boiler indicated can match with total fuel quantity；
Second acquisition unit, the natural fuel amount energy currently exported for obtaining the boiler；
Determination unit, for that poor can determine the pot according to the amount between total fuel quantity energy and the total fuel quantity energy of the reality
The coal amount that furnace needs, wherein the energy that the coal amount burning that the boiler needs generates matches with the amount energy difference；
Control unit, the coal supply system for controlling the boiler provide the coal amount that the boiler needs to the boiler.
9. device according to claim 8, which is characterized in that described control unit includes:
Regulator unit, the coal amount for being needed according to the boiler adjust the coal supply system of the boiler to coal rate；
First control subelement, the coal supply system for controlling the boiler provide institute to the boiler to coal rate according to described
State the coal amount of boiler needs.
10. device according to claim 8, which is characterized in that the determination unit includes:
Computation subunit, total fuel quantity for being needed according to the boiler can be with the difference of the natural fuel amount energy of the boiler
The amount is calculated can be poor；
First obtains subelement, for obtaining the burning of coal characteristic provided to the boiler；
Subelement is corrected, obtains the coal of the boiler needs for that poor can be corrected according to the combustion characteristics to the amount
Amount.
11. device according to claim 10, which is characterized in that the correction subelement includes:
Correction module, for fever flow characteristic, the storage carbon characteristic of the coal and the amount of stored heat of the boiler according to the coal
Characteristic is corrected the amount energy difference, obtains the coal amount that the boiler needs.
12. device according to claim 8, which is characterized in that the coal supply system includes a plurality of to seam, the control
Unit includes:
Second obtains subelement, for obtaining a plurality of coal amount distribution coefficient to described in every in seam to seam；
Third obtains subelement, and the coal amount distribution coefficient described in coal amount for being needed according to the boiler and every to seam obtains
The coal-supplying amount of seam is given described in taking every；
Second control subelement, for controlling the coal supply system of the boiler according to the coal-supplying amount described in every to seam to every
It is described to seam to coal.
13. device according to claim 12, which is characterized in that described second, which controls subelement, includes:
Module is obtained, described gives seam the practical actual amount to coal for obtaining；
Adjustment module, it is described to coal for being adjusted according to the difference of the coal-supplying amount to seam and the actual amount to seam
Line gives coal rate, wherein according to consistent with the coal-supplying amount to coal amount provided by coal rate after adjusting.
14. device according to claim 13, which is characterized in that the adjustment module includes:
Acquisition submodule, for obtain the boiler to air quantity and confluent；
Computational submodule, for calculating maximum allowable coal-supplying amount to air quantity and confluent according to the boiler；
Submodule is adjusted, for giving coal rate to seam to described every according to the maximum allowable coal-supplying amount and the difference
It is adjusted, wherein the summation of a plurality of coal-supplying amount to seam is less than or equal to the maximum allowable coal-supplying amount.
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