CN109114548B - Combustion coal feeding control method of supercritical circulating fluidized bed boiler - Google Patents
Combustion coal feeding control method of supercritical circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN109114548B CN109114548B CN201811051420.7A CN201811051420A CN109114548B CN 109114548 B CN109114548 B CN 109114548B CN 201811051420 A CN201811051420 A CN 201811051420A CN 109114548 B CN109114548 B CN 109114548B
- Authority
- CN
- China
- Prior art keywords
- coal
- boiler
- amount
- feeding
- coal feeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 753
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000000446 fuel Substances 0.000 claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000005338 heat storage Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 238000012937 correction Methods 0.000 claims description 4
- 208000011580 syndromic disease Diseases 0.000 claims description 3
- 238000005303 weighing Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 101000609957 Homo sapiens PTB-containing, cubilin and LRP1-interacting protein Proteins 0.000 description 1
- 102100039157 PTB-containing, cubilin and LRP1-interacting protein Human genes 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention discloses a combustion coal feeding control method of a supercritical circulating fluidized bed boiler. Wherein, the method comprises the following steps: acquiring total fuel quantity energy required by the boiler according to an input command of the boiler, wherein the load of the boiler indicated by the input command is matched with the total fuel quantity energy; acquiring the actual fuel quantity energy currently output by the boiler; determining the coal quantity required by the boiler according to the quantity energy difference between the total fuel quantity energy and the actual total fuel quantity energy, wherein the energy generated by the combustion of the coal quantity required by the boiler is matched with the quantity energy difference; the coal supply system of the boiler is controlled to supply the amount of coal required by the boiler to the boiler. The invention solves the technical problem of inaccurate coal feeding control.
Description
Technical Field
The invention relates to the field of automatic control, in particular to a combustion coal feeding control method of a supercritical circulating fluidized bed boiler.
Background
Although the CFB technology has been developed for a short time compared to pulverized coal boilers, it shows excellent environmental emission characteristics during the commercialization of the technology, and its pollution control cost is not comparable to that of other technologies at present.
With the rapid development of national economy, the installed capacity of domestic thermal power generation has completely entered the supercritical parameter era, and accordingly, the parameters of a large circulating fluidized bed boiler are also required to enter the supercritical era, otherwise, the large circulating fluidized bed boiler is difficult to enter a main stream unit line of thermal power generation. The supercritical unit means that the main steam pressure at the outlet of the superheater exceeds 22.129 MPa. The operating pressure of the currently operated supercritical unit is 24MPa-25 MPa. Because the supercritical once-through boiler has no steam drum, the starting and stopping speed is high, and compared with the common subcritical steam drum boiler, the supercritical once-through boiler is started to run at full load, and the load changing speed can be improved by about 1 time. Compared with the thermal efficiency of a subcritical thermal power generating unit with the same capacity, the efficiency can be improved by 2-2.5% by theoretically adopting supercritical parameters. Compared with a subcritical generator set, the supercritical generator set has lower coal consumption for power generation and more obvious environmental protection advantages.
The supercritical circulating fluidized bed technology combines two mature technologies of a circulating fluidized bed and a supercritical circulating fluidized bed, and the combined supercritical circulating fluidized bed boiler technology (SCCFB) has the advantages of a CFB combustion technology and a Supercritical (SC) steam circulation, and the supercritical circulating fluidized bed boiler is used as the next generation circulating fluidized bed combustion technology, so that the supercritical circulating fluidized bed boiler has higher power supply efficiency, and the initial investment and the operation cost of flue gas purification (desulfurization and denitration) are lower than those of flue gas desulfurization by more than 50 percent, thereby being a high-efficiency clean coal power generation technology suitable for large-scale popularization, and having quite bright future in the commercial application market.
However, because the working principle of the supercritical CFB boiler is different from that of the conventional supercritical pulverized coal furnace, especially the special mode and mechanism of the supercritical CFB boiler combustion, and the supercritical CFB boiler has great difference from the supercritical pulverized coal furnace in the aspects of the feeding system, the dynamic characteristics, the coupling condition, the control mode and the requirements of the combustion process, etc., how to maintain the balance between the input and output energy of the boiler under a certain load by adjusting and controlling the main steam pressure, the bed temperature, the bed pressure, etc. of the supercritical CFB boiler through the coal feeding amount, the primary air amount and the secondary air amount, and an important subject of the research of the combustion coal feeding control strategy of the supercritical CFB boiler.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a combustion coal feeding control method of a supercritical circulating fluidized bed boiler, which at least solves the technical problem of inaccurate coal feeding control.
According to an aspect of an embodiment of the present invention, there is provided a combustion coal feeding control method of a supercritical circulating fluidized bed boiler, including: acquiring total fuel quantity energy required by the boiler according to an input command of the boiler, wherein the load of the boiler indicated by the input command is matched with the total fuel quantity energy; acquiring the current output actual fuel quantity energy of the boiler; determining the coal quantity required by the boiler according to the energy difference between the total fuel quantity energy and the actual total fuel quantity energy, wherein the energy generated by combustion of the coal quantity required by the boiler is matched with the energy difference; and controlling a coal feeding system of the boiler to provide the boiler with the coal amount required by the boiler.
Further, controlling a coal feed system of the boiler to provide the boiler with an amount of coal required by the boiler comprises: adjusting the coal feeding rate of a coal feeding system of the boiler according to the coal amount required by the boiler; and controlling a coal feeding system of the boiler to provide the coal amount required by the boiler to the boiler according to the coal feeding rate.
Further, determining the amount of coal required by the boiler from the energy difference between the total fuel amount energy and the actual total fuel amount energy includes: calculating to obtain the energy difference according to the difference value between the total fuel quantity energy required by the boiler and the actual fuel quantity energy of the boiler; acquiring combustion characteristics of coal supplied to the boiler; and correcting the energy difference according to the combustion characteristics to obtain the coal quantity required by the boiler.
Further, the step of correcting the energy difference according to the combustion characteristics to obtain the coal amount required by the boiler comprises: and correcting the energy difference according to the calorific value characteristic of the coal, the carbon storage characteristic of the coal and the heat storage characteristic of the boiler to obtain the coal amount required by the boiler.
Further, the coal feeding system comprises a plurality of coal feeding lines, and the controlling the coal feeding system of the boiler to supply the boiler with the coal amount required by the boiler comprises: acquiring a coal quantity distribution coefficient of each coal supply line in a plurality of coal supply lines; acquiring the coal feeding amount of each coal feeding line according to the coal amount required by the boiler and the coal amount distribution coefficient of each coal feeding line; and controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line.
Further, controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line comprises: acquiring the actual coal feeding amount of the coal feeding line and the coal feeding amount of the corresponding coal feeding line; and adjusting the coal feeding rate of the coal feeding line according to the difference value between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line, wherein the coal amount provided according to the adjusted coal feeding rate is consistent with the coal feeding amount.
Further, adjusting the coal feeding rate of the coal feeding line according to the difference between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line comprises: acquiring the air supply quantity and the water supply quantity of the boiler; calculating the maximum allowable coal feeding amount according to the air feeding amount and the water feeding amount of the boiler; and adjusting the coal feeding rate of each coal feeding line according to the maximum allowed coal feeding amount and the difference, wherein the sum of the coal feeding amounts of the multiple coal feeding lines is less than or equal to the maximum allowed coal feeding amount.
According to another aspect of embodiments of the present invention, there is provided a combustion coal feeding control apparatus of a supercritical circulating fluidized bed boiler, including: a first obtaining unit, configured to obtain a total fuel quantity energy required by the boiler according to an input command of the boiler, where a load of the boiler indicated by the input command matches the total fuel quantity energy; the second acquisition unit is used for acquiring the actual fuel quantity energy currently output by the boiler; a determining unit, configured to determine an amount of coal required by the boiler according to an amount energy difference between the total fuel amount energy and the actual total fuel amount energy, where energy generated by combustion of the amount of coal required by the boiler matches the amount energy difference; and the control unit is used for controlling a coal feeding system of the boiler to supply the coal amount required by the boiler to the boiler.
Further, the control unit includes: the adjusting subunit is used for adjusting the coal feeding rate of a coal feeding system of the boiler according to the coal amount required by the boiler; and the first control subunit is used for controlling a coal feeding system of the boiler to provide the coal amount required by the boiler to the boiler according to the coal feeding rate.
Further, the determining unit includes: the calculating subunit is used for calculating the energy difference according to the difference between the total fuel quantity energy required by the boiler and the actual fuel quantity energy of the boiler; a first acquiring subunit for acquiring combustion characteristics of coal supplied to the boiler; and the correction module is used for correcting the energy difference according to the combustion characteristics to obtain the coal quantity required by the boiler.
Further, the syndrome unit includes: and the correction module is used for correcting the energy difference according to the calorific value characteristic of the coal, the carbon storage characteristic of the coal and the heat storage characteristic of the boiler to obtain the coal amount required by the boiler.
Further, the coal feeding system includes a plurality of coal feeding lines, and the control unit includes: the second acquiring subunit is used for acquiring the coal quantity distribution coefficient of each coal supply line in the plurality of coal supply lines; the third obtaining subunit is used for obtaining the coal feeding amount of each coal feeding line according to the coal amount required by the boiler and the coal amount distribution coefficient of each coal feeding line; and the second control subunit is used for controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line.
Further, the second control subunit includes: the acquisition module is used for acquiring the actual coal feeding amount of the coal feeding line; and the adjusting module is used for adjusting the coal feeding rate of the coal feeding line according to the difference value between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line, wherein the coal amount provided according to the adjusted coal feeding rate is consistent with the coal feeding amount.
Further, the adjustment module includes: the acquisition submodule is used for acquiring the air supply quantity and the water supply quantity of the boiler; the calculation submodule is used for calculating the maximum allowable coal feeding amount according to the air feeding amount and the water feeding amount of the boiler; and the adjusting submodule is used for adjusting the coal feeding rate of each coal feeding line according to the maximum allowed coal feeding amount and the difference, wherein the sum of the coal feeding amounts of the plurality of coal feeding lines is less than or equal to the maximum allowed coal feeding amount.
In the embodiment of the invention, the total fuel quantity energy required by the boiler is obtained according to the input instruction of the boiler; acquiring the actual fuel quantity energy currently output by the boiler; the method for determining the coal quantity required by the boiler according to the quantity energy difference between the total fuel quantity energy and the actual total fuel quantity energy achieves the aim of balancing the input energy and the output energy of the boiler under certain load by controlling the coal feeding system of the boiler to provide the coal quantity required by the boiler to the boiler, thereby achieving the technical effect of accurate coal feeding control and further solving the technical problem of inaccurate coal feeding control.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of controlling combustion coal feed of a supercritical circulating fluidized bed boiler according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a 600MW supercritical circulating fluidized bed boiler coal feed system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of a coal feeding system controlling coal feeding to a coal line in accordance with an embodiment of the present invention;
FIG. 4 is a flow chart of a method of a coal feed system controlling a coal feed rate of a coal feed line according to an embodiment of the present invention;
fig. 5 is a schematic view of a combustion coal feed control apparatus of the supercritical circulating fluidized bed boiler according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In accordance with an embodiment of the present invention, there is provided a method embodiment of a method of controlling combustion coal feed of a supercritical circulating fluidized bed boiler, it is noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions and that, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Fig. 1 is a flowchart of a combustion coal feed control method of a supercritical circulating fluidized bed boiler according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, acquiring total fuel quantity energy required by the boiler according to an input command of the boiler, wherein the load of the boiler indicated by the input command is matched with the total fuel quantity energy.
The method comprises the steps of obtaining an input instruction of a boiler, obtaining total fuel quantity energy required by the boiler according to the input instruction of the boiler, wherein the input instruction of the boiler comprises a load control instruction and a main steam pressure instruction of the boiler, the load control instruction indicates a load value to be reached by the boiler, the main steam pressure instruction indicates main steam pressure of the boiler, output energy when the load and the main steam pressure indicated by the load control instruction and the main steam pressure instruction of the boiler are maintained can be calculated according to the load control instruction and the main steam pressure instruction, the load and the main steam pressure are maintained by the boiler, the input energy and the output energy of the boiler are equal, and therefore the total fuel quantity energy required by the boiler is equal to the output energy of the boiler.
And step S104, acquiring the actual fuel quantity energy currently output by the boiler.
And S106, determining the coal quantity required by the boiler according to the energy difference between the total fuel quantity energy and the actual total fuel quantity energy, wherein the energy generated by combustion of the coal quantity required by the boiler is matched with the energy difference.
The method comprises the steps of obtaining the current actual fuel quantity energy of a boiler, wherein the fuel quantity energy can be obtained through calculation of the current actual load of the boiler and a main steam pressure, the difference between the total fuel quantity energy required by the boiler and the actual fuel quantity energy is the fuel quantity energy which is currently lacked by the boiler, the part of the fuel quantity energy can be provided through coal feeding to the boiler, namely, the coal feeding needs to be added to the boiler, the quantity generated by combustion of the added coal feeding quantity can be equal to the current lacked fuel quantity energy of the boiler, and after the coal feeding of the coal quantity is added to the boiler, the actual fuel quantity energy of the boiler can be equal to the total fuel quantity.
And S108, controlling a coal feeding system of the boiler to provide the coal amount required by the boiler to the boiler.
In the embodiment of the invention, the total fuel quantity energy required by the boiler is obtained according to the input instruction of the boiler; acquiring the actual fuel quantity energy currently output by the boiler; the method for determining the coal quantity required by the boiler according to the quantity energy difference between the total fuel quantity energy and the actual total fuel quantity energy achieves the aim of balancing the input energy and the output energy of the boiler under certain load by controlling the coal feeding system of the boiler to provide the coal quantity required by the boiler to the boiler, thereby achieving the technical effect of accurate coal feeding control and further solving the technical problem of inaccurate coal feeding control.
Optionally, controlling a coal feed system of the boiler to provide the boiler with an amount of coal required by the boiler comprises: adjusting the coal feeding rate of a coal feeding system of the boiler according to the coal amount required by the boiler; and controlling a coal feeding system of the boiler to provide the coal amount required by the boiler to the boiler according to the coal feeding rate.
The coal feeding system of the boiler is responsible for feeding coal to the boiler, the coal feeding rate of the coal feeding system determines the size of the coal feeding amount, the faster the coal feeding rate is, the more coal is fed to the boiler by the coal feeding system, otherwise, the slower the coal feeding rate is, the less coal is fed to the boiler by the coal feeding system, the coal feeding rate of the coal feeding system of the boiler is adjusted according to the coal amount required by the boiler, and the coal feeding amount of the coal feeding system to the boiler is equal to the coal amount required by the boiler.
Optionally, determining the amount of coal required by the boiler according to an amount energy difference between the total fuel amount energy and the actual fuel amount energy comprises: calculating to obtain the energy difference according to the difference value between the total fuel quantity energy required by the boiler and the actual fuel quantity energy of the boiler; acquiring combustion characteristics of coal supplied to the boiler; and correcting the energy difference according to the combustion characteristics to obtain the coal quantity required by the boiler.
Optionally, the obtaining of the amount of coal required by the boiler by correcting the energy difference according to the combustion characteristic includes: and correcting the energy difference according to the calorific value characteristic of the coal, the carbon storage characteristic of the coal and the heat storage characteristic of the boiler to obtain the coal amount required by the boiler.
The amount of fuel mass determines the amount of energy obtained by the boiler, however, the amount of energy obtained by the boiler during the combustion of the fuel is not only directly related to the amount of fuel mass of the boiler, but also affected by the fuel and the combustion characteristics of the boiler with respect to the fuel, for example, the amount of heat generated by the combustion of coal of the same mass is different for coal of different quality; for another example, the amount of energy obtained by different boilers when coal of the same mass is combusted varies due to the different heat storage characteristics of the different boilers. Therefore, when calculating the amount of coal required by the boiler from the energy difference between the total fuel amount energy and the actual fuel amount energy required by the boiler, the method also acquires the quality of the coal supplied to the boiler and the combustion characteristics of the boiler with respect to the coal, and corrects the amount of coal required by the boiler according to the quality and the combustion characteristics of the coal, and comprises the following steps: the amount of coal is corrected based on the calorific value characteristic and the carbon storage characteristic of the coal, and the amount of coal is corrected based on the heat storage characteristic of the boiler.
Optionally, the coal feeding system comprises a plurality of coal feeding lines, and the controlling the coal feeding system of the boiler to supply the amount of coal required by the boiler to the boiler comprises: acquiring a coal quantity distribution coefficient of each coal supply line in a plurality of coal supply lines; acquiring the coal feeding amount of each coal feeding line according to the coal amount required by the boiler and the coal amount distribution coefficient of each coal feeding line; and controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line.
The coal supply system of the boiler generally comprises a plurality of coal supply lines, distribution coefficients are set for different coal supply lines through the plurality of coal supply lines, when the coal supply system of the boiler is controlled to supply required coal amount to the boiler, the distribution coefficients of the different coal supply lines are obtained, the coal supply amount of each coal supply line is calculated according to the distribution coefficients and the required coal amount of the boiler, and the coal supply of each coal supply line is controlled according to the coal supply amount of each coal supply line.
Taking a 600MW supercritical circulating fluidized bed boiler as an example, a coal feeding system of the boiler is shown in figure 2, the coal feeding system adopts a form that a coal feeding point of a material returning device is combined with a feeding point of an external bed returning furnace, and figure 2 is a schematic view of the coal feeding system of the 600MW supercritical circulating fluidized bed boiler according to the embodiment of the invention, wherein 12 coal feeding points are arranged on a material returning leg from six material returning devices to the furnace and a material returning leg from six external heat exchangers to the furnace respectively. The coal feeding system is provided with A, B, C, D four coal feeding lines, wherein A, B coal feeding lines are arranged on the right side of the hearth, and C, D coal feeding lines are arranged on the left side of the hearth. B. C, the coal supply line enters the hearth from the material returning device to a material returning leg of the hearth, and A, D the coal supply line enters the hearth from the external bed to a hearth ash returning channel. In the process of feeding coal by the coal feeding system, setting the AB coal lines as a first group and the CD coal lines as a second group, and fig. 3 is a flow chart of a method for controlling coal feeding of the coal feeding line by the coal feeding system according to the embodiment of the present invention, as shown in fig. 3, after obtaining a coal feeding amount (i.e., an amount of coal required by a boiler) of the coal feeding machine and generating a control instruction according to the coal feeding amount of the coal feeding machine, distributing the coal feeding amount of the coal feeding machine to the AB coal lines and the CD coal lines according to distribution coefficients of the AB coal lines and the CD coal lines through coal feeding balance control; and the coal quantity instruction of the coal line A and the coal quantity instruction of the coal line B are respectively generated according to the coal quantity distributed by the coal line A and the coal quantity distributed by the coal line B, the coal quantity instruction of the coal line A is used for controlling the coal quantity distributed by the coal line A according to the coal quantity distributed by the coal line A, and the coal quantity instruction of the coal line B is used for controlling the coal quantity distributed by the coal line B according to the coal quantity distributed by the coal line B.
Optionally, controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line comprises: acquiring the actual amount of the actual coal feeding of the coal feeding line; and adjusting the coal feeding rate of the coal feeding line according to the difference value between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line, wherein the coal amount provided according to the adjusted coal feeding rate is consistent with the coal feeding amount.
When the coal feeding of the coal feeding line is controlled according to the coal feeding amount of the coal feeding line, a certain deviation occurs in the coal feeding amount of the actual coal feeding line, so that the amount of the coal fed to the boiler by the coal feeding line is controlled to be inaccurate.
Fig. 4 is a flowchart of a method for controlling a coal feeding rate of a coal feeding system according to an embodiment of the present invention, and as shown in fig. 4, a coal amount control of a coal feeder is controlled by a coal feeding balance control, an amount of coal required by a boiler is distributed to an AB coal line and a CD coal line according to distribution coefficients of the AB coal line and the CD coal line, and an AB coal line coal amount command and a CD coal line coal amount command are generated, the AB coal line coal amount command is balanced by feeding coal through the AB coal line, and an amount of coal of the AB coal line is distributed to an a coal line and a B coal line according to distribution coefficients of the a coal line and the B coal line, and an a coal line coal amount command and a B coal line coal amount command are generated. The coal line A coal feeder comprises a center feeder A, a weighing belt feeder A and a scraper feeder A, wherein a coal amount instruction of the coal line A controls the weighing belt feeder A to transmit at a certain speed, and simultaneously controls the scraper feeder A to scrape coal at a certain speed, and the center feeder A rotates to feed coal at a certain speed, wherein the transmission speed of the weighing belt feeder A is matched with the coal scraping speed of the scraper A and the rotating coal feeding speed of the center feeder A, the relation between the transmission speed of the weighing belt feeder A and the coal scraping speed of the scraper A can be expressed as a function F (x)1, and the relation between the transmission speed of the weighing belt feeder A and the rotating coal feeding speed of the center feeder A can be expressed as F (x) 5; the actual coal feeding amount of the coal feeding line A at present can be obtained according to the flow and the rotating speed of the weighing belt coal feeder A, the coal feeding rate of the coal feeding line A is adjusted according to the difference value of the coal feeding amount of the coal feeding line A and the actual coal feeding amount of the coal feeding line A, namely, if the actual coal feeding amount of the coal feeding line A is larger than the coal feeding amount distributed by the coal feeding line A, the coal feeding rate of the coal feeding line A is reduced, and further the coal feeding amount of the coal feeding line A is reduced; and if the actual coal feeding amount of the coal line A is less than the coal feeding amount distributed by the coal line A, improving the coal feeding rate of the coal line A, and further improving the coal feeding amount of the coal line A. The coal feeding control modes of the coal line B, the coal line C and the coal line D are the same as those of the coal line A.
Optionally, adjusting the coal feeding rate of the coal feeding line according to the difference between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line comprises: acquiring the air supply quantity and the water supply quantity of the boiler; calculating the maximum allowable coal feeding amount according to the air feeding amount and the water feeding amount of the boiler; and adjusting the coal feeding rate of each coal feeding line according to the maximum allowed coal feeding amount and the difference, wherein the sum of the coal feeding amounts of the plurality of coal feeding lines is less than or equal to the maximum allowed coal feeding amount.
A certain air quantity needs to be provided simultaneously in the coal combustion process in the boiler to support the combustion of coal, if the air quantity is insufficient, the coal is not sufficiently combusted, the generated heat is insufficient, and meanwhile, the phenomenon of rich coal coking can also occur; in addition, a certain amount of water needs to be supplied to the boiler, the heat generated by the combustion of the coal turns the water into steam, so that the main steam pressure is supplied to the boiler, if the amount of water is insufficient, the heat generated by the combustion of the coal cannot be completely converted into the main steam pressure, and the overheating of the boiler due to the insufficient amount of water also causes danger. Therefore, in the process of feeding coal to the boiler, the maximum allowable coal feeding amount of the boiler is calculated according to the air feeding amount and the water feeding amount of the boiler, and the sum of the coal feeding amounts of all the coal feeding lines to the boiler cannot be larger than the maximum allowable coal feeding amount of the air feeding amount and the water feeding amount of the boiler.
According to another aspect of the embodiments of the present invention, there is also provided a coal feeding control apparatus for a supercritical circulating fluidized bed boiler, and fig. 5 is a schematic view of the coal feeding control apparatus for a supercritical circulating fluidized bed boiler according to the embodiments of the present invention, as shown in fig. 5, the apparatus mainly includes:
a first obtaining unit 501, configured to obtain a total fuel amount energy required by the boiler according to an input command of the boiler, where a load of the boiler indicated by the input command matches the total fuel amount energy.
The first obtaining unit 501 obtains an input instruction of a boiler, and obtains total fuel energy required by the boiler according to the input instruction of the boiler, where the input instruction of the boiler includes a load control instruction of the boiler and a main steam pressure instruction, the load control instruction indicates a load value to be reached by the boiler, the main steam pressure instruction indicates a main steam pressure of the boiler, and output energy when the load and the main steam pressure indicated by the load control instruction and the main steam pressure instruction are maintained by the boiler can be calculated according to the load control instruction and the main steam pressure instruction, so that the boiler maintains the load and the main steam pressure, and the input energy and the output energy of the boiler should be equal to each other, so that the total fuel energy required by the boiler is equal to the output energy of the boiler.
A second obtaining unit 502, configured to obtain an actual fuel quantity currently output by the boiler.
A determining unit 503, configured to determine the amount of coal required by the boiler according to a difference between the total fuel amount energy and the actual total fuel amount energy, where the amount of coal required by the boiler is combusted to generate energy matching the difference.
The second obtaining unit 502 obtains the current actual fuel quantity energy of the boiler, which can be calculated by the current actual load of the boiler and the main steam pressure, and the determining unit 503 determines the current fuel quantity energy lacking in the boiler according to the difference between the total fuel quantity energy required by the boiler and the actual fuel quantity energy, and this part of the quantity can be provided by adding coal to the boiler, that is, by adding coal to the boiler, the quantity generated by the combustion of the added coal quantity energy is equal to the current fuel quantity energy lacking in the boiler, so that the actual fuel quantity energy of the boiler can be equal to the total fuel quantity energy required by the boiler.
A control unit 504 for controlling a coal feeding system of the boiler to provide the boiler with the amount of coal required by the boiler.
In the embodiment of the invention, the total fuel quantity energy required by the boiler is obtained according to the input instruction of the boiler; acquiring the actual fuel quantity energy currently output by the boiler; the method for determining the coal quantity required by the boiler according to the quantity energy difference between the total fuel quantity energy and the actual total fuel quantity energy achieves the aim of balancing the input energy and the output energy of the boiler under certain load by controlling the coal feeding system of the boiler to provide the coal quantity required by the boiler to the boiler, thereby achieving the technical effect of accurate coal feeding control and further solving the technical problem of inaccurate coal feeding control.
Optionally, the control unit comprises: the adjusting subunit is used for adjusting the coal feeding rate of a coal feeding system of the boiler according to the coal amount required by the boiler; and the first control subunit is used for controlling a coal feeding system of the boiler to provide the coal amount required by the boiler to the boiler according to the coal feeding rate.
The coal feeding system of the boiler is responsible for feeding coal to the boiler, the coal feeding rate of the coal feeding system determines the size of the coal feeding amount, the faster the coal feeding rate is, the more coal is fed to the boiler by the coal feeding system, otherwise, the slower the coal feeding rate is, the less coal is fed to the boiler by the coal feeding system, the coal feeding rate of the coal feeding system of the boiler is adjusted according to the coal amount required by the boiler, and the coal feeding amount of the coal feeding system to the boiler is equal to the coal amount required by the boiler.
Optionally, the determining unit includes: the calculating subunit is used for calculating the energy difference according to the difference between the total fuel quantity energy required by the boiler and the actual fuel quantity energy of the boiler; a first acquiring subunit for acquiring combustion characteristics of coal supplied to the boiler; and the corrector subunit is used for correcting the energy difference according to the combustion characteristics to obtain the coal quantity required by the boiler.
Optionally, the syndrome unit includes: and the correction module is used for correcting the energy difference according to the calorific value characteristic of the coal, the carbon storage characteristic of the coal and the heat storage characteristic of the boiler to obtain the coal amount required by the boiler.
The amount of fuel mass determines the amount of energy obtained by the boiler, however, the amount of energy obtained by the boiler during the combustion of the fuel is not only directly related to the amount of fuel mass of the boiler, but also affected by the fuel and the combustion characteristics of the boiler with respect to the fuel, for example, the amount of heat generated by the combustion of coal of the same mass is different for coal of different quality; for another example, the amount of energy obtained by different boilers when coal of the same mass is combusted varies due to the different heat storage characteristics of the different boilers. Therefore, when calculating the amount of coal required by the boiler from the energy difference between the total fuel amount energy and the actual fuel amount energy required by the boiler, the method also acquires the quality of the coal supplied to the boiler and the combustion characteristics of the boiler with respect to the coal, and corrects the amount of coal required by the boiler according to the quality and the combustion characteristics of the coal, and comprises the following steps: the amount of coal is corrected based on the calorific value characteristic and the carbon storage characteristic of the coal, and the amount of coal is corrected based on the heat storage characteristic of the boiler.
Optionally, the coal feeding system comprises a plurality of coal feeding lines, and the control unit comprises: the second acquisition module is used for acquiring the coal quantity distribution coefficient of each coal supply line in the plurality of coal supply lines; the third obtaining subunit is used for obtaining the coal feeding amount of each coal feeding line according to the coal amount required by the boiler and the coal amount distribution coefficient of each coal feeding line; and the second control subunit is used for controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line.
The coal supply system of the boiler generally comprises a plurality of coal supply lines, distribution coefficients are set for different coal supply lines through the plurality of coal supply lines, when the coal supply system of the boiler is controlled to supply required coal amount to the boiler, the distribution coefficients of the different coal supply lines are obtained, the coal supply amount of each coal supply line is calculated according to the distribution coefficients and the required coal amount of the boiler, and the coal supply of each coal supply line is controlled according to the coal supply amount of each coal supply line.
As shown in fig. 3, the coal feeding system includes 4 coal feeding lines, the AB coal line is set as a first group, the CD coal line is set as a second group, and after the coal feeding amount (i.e., the amount of coal required by the boiler) of the coal feeder is obtained and a control command is generated according to the coal feeding amount of the coal feeder, the coal feeding amount of the coal feeder is distributed to the AB coal line and the CD coal line according to the distribution coefficients of the AB coal line and the CD coal line through the coal feeding balance control; the method comprises the steps of generating an AB coal line coal quantity instruction according to the coal supply quantity distributed by an AB coal line, distributing the coal supply quantity to the AB coal line to an A coal line and a B coal line by the AB coal supply balance control according to distribution coefficients of the A coal line and the B coal line after the AB coal line coal quantity instruction and the actual coal quantity of the AB coal line are calculated by a PID1 calculation 1, respectively generating the A coal line coal quantity instruction and the B coal line coal quantity instruction by the A coal line and the B coal line according to the coal quantity distributed by the A coal line and the coal quantity distributed by the B coal line, controlling the A coal line coal quantity instruction to supply coal according to the coal quantity distributed by the A coal line, and controlling the B coal line coal quantity instruction to supply coal according to the coal quantity distributed by the B coal line.
Optionally, the second control subunit includes: the acquisition module is used for acquiring the actual coal feeding amount of the coal feeding line; and the adjusting module is used for adjusting the coal feeding rate of the coal feeding line according to the difference value between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line, wherein the coal amount provided according to the adjusted coal feeding rate is consistent with the coal feeding amount.
When the coal feeding of the coal feeding line is controlled according to the coal feeding amount of the coal feeding line, a certain deviation occurs in the coal feeding amount of the actual coal feeding line, so that the amount of the coal fed to the furnace locking line is inaccurate, in order to ensure the accuracy, the actual coal feeding amount of the coal feeding line is obtained, and the coal feeding rate of the coal feeding line is adjusted according to the difference value between the coal feeding amount distributed to the coal feeding line and the actual coal feeding amount of the coal feeding line, so that the actual coal feeding amount of the coal feeding line is equal to the distributed coal feeding amount.
As shown in fig. 4, the coal amount control of the coal feeder is controlled by the coal supply balance, the coal amount required by the boiler is distributed to the AB coal line and the CD coal line according to the distribution coefficients of the AB coal line and the CD coal line, and an AB coal line coal amount command and a CD coal line coal amount command are generated. The coal line A coal feeder comprises a center feeder A, a weighing belt feeder A and a scraper feeder A, wherein a coal amount instruction of the coal line A controls the weighing belt feeder A to transmit at a certain speed, and simultaneously controls the scraper feeder A to scrape coal at a certain speed, and the center feeder A rotates to feed coal at a certain speed, wherein the transmission speed of the weighing belt feeder A is matched with the coal scraping speed of the scraper A and the rotating coal feeding speed of the center feeder A, the relation between the transmission speed of the weighing belt feeder A and the coal scraping speed of the scraper A can be expressed as a function F (x)1, and the relation between the transmission speed of the weighing belt feeder A and the rotating coal feeding speed of the center feeder A can be expressed as F (x) 5; the actual coal feeding amount of the coal feeding line A at present can be obtained according to the flow and the rotating speed of the weighing belt coal feeder A, the coal feeding rate of the coal feeding line A is adjusted according to the difference value of the coal feeding amount of the coal feeding line A and the actual coal feeding amount of the coal feeding line A, namely, if the actual coal feeding amount of the coal feeding line A is larger than the coal feeding amount distributed by the coal feeding line A, the coal feeding rate of the coal feeding line A is reduced, and further the coal feeding amount of the coal feeding line A is reduced; and if the actual coal feeding amount of the coal line A is less than the coal feeding amount distributed by the coal line A, improving the coal feeding rate of the coal line A, and further improving the coal feeding amount of the coal line A. The coal feeding control modes of the coal line B, the coal line C and the coal line D are the same as those of the coal line A.
Optionally, the adjusting module comprises: the acquisition submodule is used for acquiring the air supply quantity and the water supply quantity of the boiler; the calculation submodule is used for calculating the maximum allowable coal feeding amount according to the air feeding amount and the water feeding amount of the boiler; and the adjusting submodule is used for adjusting the coal feeding rate of each coal feeding line according to the maximum allowed coal feeding amount and the difference, wherein the sum of the coal feeding amounts of the plurality of coal feeding lines is less than or equal to the maximum allowed coal feeding amount.
A certain air quantity needs to be provided simultaneously in the coal combustion process in the boiler to support the combustion of coal, if the air quantity is insufficient, the coal is not sufficiently combusted, the generated heat is insufficient, and meanwhile, the phenomenon of rich coal coking can also occur; in addition, a certain amount of water needs to be supplied to the boiler, the heat generated by the combustion of the coal turns the water into steam, so that the main steam pressure is supplied to the boiler, if the amount of water is insufficient, the heat generated by the combustion of the coal cannot be completely converted into the main steam pressure, and the overheating of the boiler due to the insufficient amount of water also causes danger. Therefore, in the process of feeding coal to the boiler, the maximum allowable coal feeding amount of the boiler is calculated according to the air feeding amount and the water feeding amount of the boiler, and the sum of the coal feeding amounts of all the coal feeding lines to the boiler cannot be larger than the maximum allowable coal feeding amount of the air feeding amount and the water feeding amount of the boiler.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for controlling the combustion coal feeding of a supercritical circulating fluidized bed boiler is characterized by comprising the following steps:
acquiring total fuel quantity energy required by the boiler according to an input command of the boiler, wherein the load of the boiler indicated by the input command is matched with the total fuel quantity energy;
acquiring the current output actual fuel quantity energy of the boiler;
determining the coal quantity required by the boiler according to the energy difference between the total fuel quantity energy and the actual total fuel quantity energy, wherein the energy generated by combustion of the coal quantity required by the boiler is matched with the energy difference;
controlling a coal feeding system of the boiler to provide the boiler with the coal amount required by the boiler;
determining the amount of coal required by the boiler according to an amount energy difference between the total fuel amount energy and the actual fuel amount energy includes: calculating to obtain the energy difference according to the difference value between the total fuel quantity energy required by the boiler and the actual fuel quantity energy of the boiler; acquiring combustion characteristics of coal supplied to the boiler; correcting the energy difference according to the combustion characteristics to obtain the coal quantity required by the boiler;
correcting the energy difference according to the combustion characteristics to obtain the coal amount required by the boiler comprises: correcting the energy difference according to the calorific value characteristic of the coal, the carbon storage characteristic of the coal and the heat storage characteristic of the boiler to obtain the coal amount required by the boiler;
also, the method for correcting the amount of coal required by the boiler based on the quality and combustion characteristics of the coal includes: the amount of coal is corrected based on the characteristic of the calorific value of the coal and the characteristic of the carbon storage amount, and the amount of coal is corrected based on the characteristic of the heat storage amount of the boiler.
2. The method of claim 1, wherein controlling a coal feed system of the boiler to provide an amount of coal required by the boiler to the boiler comprises:
adjusting the coal feeding rate of a coal feeding system of the boiler according to the coal amount required by the boiler;
and controlling a coal feeding system of the boiler to provide the coal amount required by the boiler to the boiler according to the coal feeding rate.
3. The method of claim 1, wherein the coal feed system comprises a plurality of coal feed lines, and wherein controlling the coal feed system of the boiler to provide the boiler with the amount of coal required by the boiler comprises:
acquiring a coal quantity distribution coefficient of each coal supply line in a plurality of coal supply lines;
acquiring the coal feeding amount of each coal feeding line according to the coal amount required by the boiler and the coal amount distribution coefficient of each coal feeding line;
and controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line.
4. The method of claim 3, wherein controlling a coal feed system of the boiler to feed coal to each of the coal feed lines according to a coal feed amount of each of the coal feed lines comprises:
acquiring the actual amount of the actual coal feeding of the coal feeding line;
and adjusting the coal feeding rate of the coal feeding line according to the difference value between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line, wherein the coal amount provided according to the adjusted coal feeding rate is consistent with the coal feeding amount.
5. The method of claim 4, wherein adjusting the coal feed rate of the coal feed line based on the difference between the amount of coal fed to the coal feed line and the actual amount of the coal feed line comprises:
acquiring the air supply quantity and the water supply quantity of the boiler;
calculating the maximum allowable coal feeding amount according to the air feeding amount and the water feeding amount of the boiler;
and adjusting the coal feeding rate of each coal feeding line according to the maximum allowed coal feeding amount and the difference, wherein the sum of the coal feeding amounts of the plurality of coal feeding lines is less than or equal to the maximum allowed coal feeding amount.
6. A combustion coal supply control device of a supercritical circulating fluidized bed boiler, characterized by comprising: a first obtaining unit, configured to obtain a total fuel quantity energy required by the boiler according to an input command of the boiler, where a load of the boiler indicated by the input command matches the total fuel quantity energy;
the second acquisition unit is used for acquiring the actual fuel quantity energy currently output by the boiler;
a determining unit, configured to determine an amount of coal required by the boiler according to an amount energy difference between the total fuel amount energy and the actual total fuel amount energy, where energy generated by combustion of the amount of coal required by the boiler matches the amount energy difference;
the control unit is used for controlling a coal feeding system of the boiler to supply the coal amount required by the boiler to the boiler;
the determination unit includes: the calculating subunit is used for calculating the energy difference according to the difference between the total fuel quantity energy required by the boiler and the actual fuel quantity energy of the boiler; a first acquiring subunit for acquiring combustion characteristics of coal supplied to the boiler; the corrector sub-unit is used for correcting the energy difference according to the combustion characteristics to obtain the coal quantity required by the boiler;
the syndrome unit includes: the correction module is used for correcting the energy difference according to the calorific value characteristic of the coal, the carbon storage characteristic of the coal and the heat storage characteristic of the boiler to obtain the coal amount required by the boiler;
also, the method for correcting the amount of coal required by the boiler based on the quality and combustion characteristics of the coal includes: the amount of coal is corrected based on the characteristic of the calorific value of the coal and the characteristic of the carbon storage amount, and the amount of coal is corrected based on the characteristic of the heat storage amount of the boiler.
7. The apparatus of claim 6, wherein the control unit comprises:
the adjusting subunit is used for adjusting the coal feeding rate of a coal feeding system of the boiler according to the coal amount required by the boiler;
and the first control subunit is used for controlling a coal feeding system of the boiler to provide the coal amount required by the boiler to the boiler according to the coal feeding rate.
8. The apparatus of claim 6, wherein the coal feed system comprises a plurality of coal feed lines, and the control unit comprises:
the second acquiring subunit is used for acquiring the coal quantity distribution coefficient of each coal supply line in the plurality of coal supply lines;
the third obtaining subunit is used for obtaining the coal feeding amount of each coal feeding line according to the coal amount required by the boiler and the coal amount distribution coefficient of each coal feeding line;
and the second control subunit is used for controlling a coal feeding system of the boiler to feed coal to each coal feeding line according to the coal feeding amount of each coal feeding line.
9. The apparatus of claim 8, wherein the second control subunit comprises:
the acquisition module is used for acquiring the actual coal feeding amount of the coal feeding line;
and the adjusting module is used for adjusting the coal feeding rate of the coal feeding line according to the difference value between the coal feeding amount of the coal feeding line and the actual amount of the coal feeding line, wherein the coal amount provided according to the adjusted coal feeding rate is consistent with the coal feeding amount.
10. The apparatus of claim 9, wherein the adjustment module comprises:
the acquisition submodule is used for acquiring the air supply quantity and the water supply quantity of the boiler;
the calculation submodule is used for calculating the maximum allowable coal feeding amount according to the air feeding amount and the water feeding amount of the boiler;
and the adjusting submodule is used for adjusting the coal feeding rate of each coal feeding line according to the maximum allowed coal feeding amount and the difference, wherein the sum of the coal feeding amounts of the plurality of coal feeding lines is less than or equal to the maximum allowed coal feeding amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811051420.7A CN109114548B (en) | 2018-09-10 | 2018-09-10 | Combustion coal feeding control method of supercritical circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811051420.7A CN109114548B (en) | 2018-09-10 | 2018-09-10 | Combustion coal feeding control method of supercritical circulating fluidized bed boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109114548A CN109114548A (en) | 2019-01-01 |
| CN109114548B true CN109114548B (en) | 2020-04-17 |
Family
ID=64859096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811051420.7A Active CN109114548B (en) | 2018-09-10 | 2018-09-10 | Combustion coal feeding control method of supercritical circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109114548B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550777B (en) * | 2020-06-23 | 2022-05-13 | 杭州和利时自动化有限公司 | Method and system for controlling coal feeding amount of circulating fluidized bed boiler |
| CN112902215B (en) * | 2020-12-11 | 2024-09-03 | 中国能源建设集团广东省电力设计研究院有限公司 | Control device and method for bottom coal feeder of boiler |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498060C (en) * | 2005-11-11 | 2009-06-10 | 南京科远控制工程有限公司 | Method for controlling optimized burning in circulating fluid bed boiler |
| CN101799170B (en) * | 2010-03-18 | 2012-02-08 | 华北电力大学 | Method for correcting fuel calorific capacity of coal-fired boiler in real time |
| EP2738373A1 (en) * | 2012-12-03 | 2014-06-04 | Siemens Aktiengesellschaft | Gas turbine fuel supply method and arrangement |
| TW201544766A (en) * | 2014-05-16 | 2015-12-01 | 中原大學 | Fluidized bed boiler and method for enhancing operational efficiency of the same |
| CN104807003B (en) * | 2015-04-22 | 2017-06-20 | 大唐武安发电有限公司 | The system and method for the Circulating Fluidized Bed Temperature control based on fuel self-balancing |
| CN105183023B (en) * | 2015-08-05 | 2017-12-01 | 华北电力科学研究院有限责任公司 | A kind of monoblock main vapour pressure feed forward control method and device |
| CN205450588U (en) * | 2016-02-03 | 2016-08-10 | 国网山东省电力公司电力科学研究院 | Boiler control parameter dynamic state adjusting device based on calorific capacity |
| CN106802309A (en) * | 2017-02-22 | 2017-06-06 | 江苏铭彦科技有限公司 | One kind enters stove coal burning caloricity real-time monitoring system and its monitoring method |
-
2018
- 2018-09-10 CN CN201811051420.7A patent/CN109114548B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109114548A (en) | 2019-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gao et al. | Investigation on energy storage and quick load change control of subcritical circulating fluidized bed boiler units | |
| CN109856966B (en) | Transient variable load coal supply control method considering coal-fired boiler accumulation correction | |
| CN109114548B (en) | Combustion coal feeding control method of supercritical circulating fluidized bed boiler | |
| CN105202571B (en) | A kind of thermal power generation unit main vapour pressure optimal control method | |
| CN110145761B (en) | Negative pressure optimization control method for BFG boiler | |
| JP2015218920A (en) | Coal-fired boiler and operation control method of the same | |
| CN109899780B (en) | Electric heating heat storage system of circulating fluidized bed boiler for cogeneration unit | |
| AU2015215901A1 (en) | Apparatus and method for controlling at least one operational parameter of a plant | |
| CN111981459A (en) | Optimization control method of multi-fuel co-combustion coal-fired unit under RB working condition | |
| JP7261113B2 (en) | BOILER CONTROL DEVICE, BOILER SYSTEM, POWER PLANT, AND BOILER CONTROL METHOD | |
| CN113739195B (en) | Method, device, equipment and medium for controlling separated coal feeding amount | |
| CN106524141B (en) | A kind of subcritical circulating fluidized bed boiler unit quick load change control method | |
| KR102086250B1 (en) | Boiler Enthalpy Automatic Control Circuit On Classified By Coal Property | |
| JP6995603B2 (en) | Circulating fluidized bed combustion furnace plant | |
| CN108278597B (en) | Coal feeding control system of circulating fluidized bed boiler and fuzzy control method thereof | |
| CN111830831A (en) | Control optimization method and control optimization system applying multi-term self-adaptive dynamic feedforward | |
| CN111853850A (en) | Model-based pre-estimation primary air control system for low-calorific-value coal combustion | |
| CN113346498B (en) | IGCC generator set power load distribution method | |
| JP5359384B2 (en) | Operation control method and operation control device for circulating fluidized bed boiler | |
| CN205782843U (en) | System for utilize steelmaking waste heat steam to generate electricity | |
| CN101535912B (en) | Method and arrangement for air quantity regulation of a combustion system which is operated with solid fossil fuels | |
| Pan et al. | Full process control strategy of fuel based on water-coal ratio of ultra supercritical units | |
| CN106352315A (en) | Boiler operation method and boiler apparatus | |
| EP3415816B1 (en) | A method and a system for extending the load range of a power plant comprising a boiler supplying steam to a steam turbine | |
| JPH10274007A (en) | Method for supplying steam to coke dry type fire extinguishing facilities and device therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |