CN110056903B - Method and system for determining coal amount of different coal types under condition of coal-fired co-combustion - Google Patents
Method and system for determining coal amount of different coal types under condition of coal-fired co-combustion Download PDFInfo
- Publication number
- CN110056903B CN110056903B CN201910354928.2A CN201910354928A CN110056903B CN 110056903 B CN110056903 B CN 110056903B CN 201910354928 A CN201910354928 A CN 201910354928A CN 110056903 B CN110056903 B CN 110056903B
- Authority
- CN
- China
- Prior art keywords
- coal
- determining
- amount
- different
- bunker
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/002—Regulating fuel supply using electronic means
Abstract
The invention discloses a method and a system for determining coal amount of different coal types under the condition of coal-fired co-combustion, wherein the method for determining comprises the following steps: obtaining heat values of coal types corresponding to different coal bunkers; determining coal amount distribution weights corresponding to different coal bins according to the heat value, wherein the heat value is in positive correlation with the coal amount distribution weights; and determining the coal amount of corresponding coal types distributed to different coal bunkers according to the coal amount distribution weight. The invention improves the stability of the pulverizing system and the boiler combustion of the existing coal-fired unit; and the coal bunker with different heat values changes different coal amounts when the load of the coal-fired unit is changed, thereby being beneficial to the stability of the adjusting system of the coal-fired unit, improving the load changing performance and improving the running safety of the coal-fired unit under the condition of blending and burning various coals.
Description
Technical Field
The invention relates to the technical field of control of coal-fired units, in particular to a method and a system for determining coal quantity of different coal types under the condition of coal-fired co-combustion.
Background
For coal-fired boilers, it is common to design them according to a specific coal type and to provide them with a certain type of check coal. However, because of the variable coal price, power plants often mix and burn inferior coal types with different heat values in order to save the coal cost and increase the profit, which is particularly prominent in recent years, and the mixing and burning proportion is higher and higher.
The coal-fired unit adopts the mode of coal feeding in different bins (namely different coal bins correspond to different coal types) and mixed combustion in the furnace, and different coal mills are used for respectively grinding different coal types to be fed into the furnace for combustion. Compared with the designed coal types, the common blended inferior coal types have the problems of large ash content and moisture content, obviously low calorific value and the like, and the inferior coal has too high moisture content, thereby bringing the potential risk of coal blockage to the coal mill; poor-quality coal has poor grindability, so that the output of a coal mill is influenced, and the stable combustion performance of a boiler is influenced; in addition, the heating value of the low-grade coal is lower, the response characteristics of the low-grade coal to the load and the steam pressure of the coal-fired unit are worse than the designed coal type, and the unstable steam temperature and the unstable steam pressure of the coal-fired unit and the reduction of the load-variable performance of the coal-fired unit can be caused.
The existing determining system of the coal-fired unit cannot judge and identify the coal-fired co-combustion condition, and the fuel main control controls the total coal quantity to be evenly distributed to each coal feeder according to a conventional mode, so that the output of the coal mill for grinding inferior coal is often overlarge, and the coal quantity of superior and inferior coal is increased and decreased in the same proportion in a dynamic process (namely when the load of the coal-fired unit changes), so that the load response of the coal-fired unit is poor.
Disclosure of Invention
The invention aims to solve the technical problems that the existing determining system of the coal-fired unit in the prior art cannot judge and identify the coal-fired co-combustion condition, has the defects of overlarge output of a coal mill for grinding inferior coal, poor load response of the coal-fired unit and the like, and aims to provide a method and a system for determining the coal quantity of different coal types under the coal-fired co-combustion condition.
The invention solves the technical problems through the following technical scheme:
the invention provides a method for determining coal amount of different coal types under the condition of coal-fired co-combustion, which comprises the following steps:
obtaining heat values of coal types corresponding to different coal bunkers;
determining coal amount distribution weights corresponding to different coal bins according to the heat value, wherein the heat value is in positive correlation with the coal amount distribution weights;
and determining the coal amount of corresponding coal types distributed to different coal bunkers according to the coal amount distribution weight.
Preferably, the calculation formula corresponding to the step of determining the coal amount distribution weights corresponding to the different coal bunkers according to the heat value includes:
wherein i and n are positive integers;
mirepresenting the heat value corresponding to the coal type in the ith coal bunker, n representing the number of coal feeders currently operated by the coal-fired unit and used for feeding coal to the coal bunker, KiAnd representing the coal amount distribution weight corresponding to the ith coal bunker.
Preferably, the determining method further comprises:
when the load of the coal-fired unit changes, determining that the changed coal amount in the coal bunker with the coal amount distribution weight exceeding a set threshold is larger than the changed coal amount in the coal bunker with the coal amount distribution weight not exceeding the set threshold.
Preferably, when the load of the coal-fired unit changes, the step of determining that the amount of coal changed in the bunker whose coal distribution weight exceeds a set threshold is larger than the amount of coal changed in the bunker whose coal distribution weight does not exceed the set threshold includes:
when the load of the coal-fired unit is increased, determining that the coal amount increased in the coal bunker of which the coal amount distribution weight exceeds the set threshold is larger than the coal amount increased in the coal bunker of which the coal amount distribution weight does not exceed the set threshold;
when the load of the coal-fired unit is reduced, determining that the reduced coal amount in the coal bunker of which the coal amount distribution weight exceeds the set threshold is larger than the reduced coal amount in the coal bunker of which the coal amount distribution weight does not exceed the set threshold.
The invention also provides a system for determining the coal amount of different coal types under the condition of coal-fired co-combustion, wherein the system for determining the coal amount comprises a heat value acquisition module, a distribution weight determination module and a coal amount determination module;
the heat value acquisition module is used for acquiring the heat values of coal types corresponding to different coal bunkers;
the distribution weight determining module is used for determining coal distribution weights corresponding to different coal bunkers according to the heat values, wherein the heat values are in positive correlation with the coal distribution weights;
the coal quantity determining module is used for determining the coal quantity of corresponding coal types distributed to different coal bunkers according to the coal quantity distribution weight.
Preferably, the determining the distribution weight of the coal bunker by the distribution weight determining module according to the heat value comprises:
wherein i and n are positive integers;
mirepresenting the heat value corresponding to the coal type in the ith coal bunker, n representing the number of coal feeders currently operated by the coal-fired unit and used for feeding coal to the coal bunker, KiAnd representing the coal amount distribution weight corresponding to the ith coal bunker.
Preferably, the determination system further comprises a coal amount change determination module;
the coal quantity change determining module is used for determining that the coal quantity changed in the coal bunker with the coal quantity distribution weight exceeding a set threshold is larger than the coal quantity changed in the coal bunker with the coal quantity distribution weight not exceeding the set threshold when the load of the coal-fired unit changes.
Preferably, the coal amount change determining module is configured to determine that the amount of coal added to the bunker whose coal amount distribution weight exceeds the set threshold is greater than the amount of coal added to the bunker whose coal amount distribution weight does not exceed the set threshold when the load of the coal-fired unit increases;
the coal quantity change determining module is further used for determining that the reduced coal quantity in the coal bunker with the coal quantity distribution weight exceeding the set threshold is larger than the reduced coal quantity in the coal bunker with the coal quantity distribution weight not exceeding the set threshold when the load of the coal-fired unit is reduced.
The positive progress effects of the invention are as follows:
according to the method, the distribution weights of the coal amount corresponding to different coal bins are determined according to the heat values of the coal types corresponding to the different coal bins, and the coal amount corresponding to the coal type is distributed to the different coal bins according to the distribution weights of the coal amount, so that under the condition that the total coal supply amount of a coal feeder is not changed, the output of a coal mill corresponding to the coal type with higher heat value is larger, and the output of a coal mill corresponding to the coal type with smaller heat value is smaller, so that the combustion stability of a coal pulverizing system (coal mill) and a boiler of the conventional coal-fired unit is improved; and the coal bunker with different heat values changes different coal amounts when the load of the coal-fired unit is changed, thereby being beneficial to the stability of the adjusting system of the coal-fired unit, improving the load changing performance and improving the running safety of the coal-fired unit under the condition of blending and burning various coals.
Drawings
Fig. 1 is a flowchart of a method for determining the coal amounts of different coal types in the case of co-combustion of coal according to example 1 of the present invention.
Fig. 2 is a flowchart of a method for determining the coal amounts of different coal types in the case of co-combustion of coal according to example 2 of the present invention.
Fig. 3 is a schematic block diagram of a system for determining the coal amounts of different coal types in the case of co-combustion of coal according to embodiment 3 of the present invention.
Fig. 4 is a schematic block diagram of a system for determining the coal amounts of different coal types in the case of co-combustion of coal according to embodiment 4 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
In this embodiment, multiple coal types in the coal-fired unit are subjected to co-combustion in a separate-bin charging mode, where each coal bin corresponds to one coal type, each coal bin corresponds to one coal feeder and one coal mill, an outlet of each coal mill is in butt joint with different coal seams of the coal-fired furnace, that is, each coal type is conveyed to the corresponding coal bin through the coal feeder, then is ground into coal powder through the coal mill, and then different coal powders are sent into the coal-fired furnace through different coal seams to be subjected to co-combustion.
As shown in fig. 1, the method for determining the coal amount of different coal types under the condition of co-combustion of coal in this embodiment includes:
s101, obtaining heat values of coal types corresponding to different coal bunkers;
wherein, the operation and maintenance personnel input the heat value of the coal in the current coal bunker in the input module of the heat value of the coal installed at each coal bunker. If other coal types are burned in a certain coal bunker, the heat value of the new coal type corresponding to the coal bunker is reset.
S102, determining coal amount distribution weights corresponding to different coal bunkers according to a heat value, wherein the heat value is in positive correlation with the coal amount distribution weights;
and S103, determining the coal amount of the corresponding coal types distributed to different coal bunkers according to the coal amount distribution weight.
Specifically, after the coal quantity distribution weight corresponding to the same coal bunker is determined, a coal quantity control instruction output by a fuel main control in a coal-fired unit is corrected, and the coal feeders are controlled to convey the coal quantity of corresponding coal types to the corresponding coal bunkers according to the coal quantity control instruction, so that the coal quantity of each coal feeder is subjected to differential processing, instead of conveying the corresponding coal types to each coal feeder in an equivalent manner in a traditional control mode, the output of the coal feeder corresponding to a good coal type (a coal type with a higher heat value) is increased, and the output of the coal feeder corresponding to a poor coal type (a coal type with a lower heat value) is reduced; although the coal feeder is corrected to convey the coal amount of the corresponding coal type to the corresponding coal bunker, the total coal amount of all the coal feeders is kept unchanged, so that the output of the coal feeder for the coal type with poor quality is relatively less, and the grinding pressure of the corresponding coal grinding machine is reduced.
In this embodiment, for the heat values of the coal types corresponding to different coal bunkers, the coal amount distribution weights corresponding to the different coal bunkers are determined, and the coal amounts of the coal types corresponding to the different coal bunkers are determined according to the coal amount distribution weights, so that under the condition that the total coal amount of the coal feeder is not changed, the output of the coal mill corresponding to the coal type with a higher heat value is larger, and the output of the coal mill corresponding to the coal type with a smaller heat value is smaller, so that the combustion stability of a coal pulverizing system (coal mill) and a boiler of the existing coal-fired unit is improved.
Example 2
As shown in fig. 2, the method for determining the coal amount of different coal types in the case of co-combustion of coal in this embodiment is a further improvement of embodiment 1, specifically:
the calculation formula corresponding to step S102 includes:
wherein i and n are positive integers;
mirepresenting the heat value corresponding to the coal type in the ith coal bunker, n representing the number of coal feeders currently put into operation by the coal-fired unit and used for feeding coal to the coal bunkers, KiAnd representing the coal amount distribution weight corresponding to the ith coal bunker.
Step S103 is followed by:
and S104, when the load of the coal-fired unit changes, determining that the coal quantity changed in the coal bunker with the coal quantity distribution weight exceeding the set threshold is larger than the coal quantity changed in the coal bunker with the coal quantity distribution weight not exceeding the set threshold.
Specifically, the method comprises the following steps: when the load of the coal-fired unit is increased, determining that the coal quantity increased in the coal bunker with the coal quantity distribution weight exceeding the set threshold is larger than the coal quantity increased in the coal bunker with the coal quantity distribution weight not exceeding the set threshold;
when the load of the coal-fired unit is reduced, the coal quantity reduced in the coal bunker with the coal quantity distribution weight exceeding the set threshold is determined to be larger than the coal quantity reduced in the coal bunker with the coal quantity distribution weight not exceeding the set threshold.
The following is a detailed description with reference to examples:
when the coal-fired unit is in a low-load working condition (three coal mills are operated), the heat value of the coal bunker A is 24mj/kg, the heat value of the coal bunker B is 24mj/kg, and the heat value of the coal bunker C is 16mj/kg, so that the coal quantity distribution weights corresponding to the coal bunker A, the coal bunker B and the coal bunker C are respectively 1.125, 1.125 and 0.75.
Assuming that the total coal burning quantity of the coal feeders is 150t/h, if a traditional control mode is selected and the total coal quantity is evenly distributed to each coal feeder, the output of coal mills corresponding to the coal bunker A, the coal bunker B and the coal bunker C is respectively 50t/h, 50t/h and 50 t/h; by adopting the control mode of the embodiment, the coal mill output forces corresponding to the coal bunker A, the coal bunker B and the coal bunker C are respectively 56.25t/h, 56.25t/h and 37.5 t/h. Therefore, the blended combustion control mode of the embodiment adaptively reduces the output of the coal mill of the low-grade coal according to different coal types, effectively relieves the influence of high water content and poor grindability of the low-grade coal on the pulverizing system equipment, and ensures the combustion stability of the boiler.
In the embodiment, the coal amount distribution weights corresponding to different coal bunkers are determined according to the heat values of the coal types corresponding to the different coal bunkers, and the coal amounts of the coal types corresponding to the different coal bunkers are determined according to the coal amount distribution weights, so that under the condition that the total coal amount of the coal feeder is not changed, the output of a coal mill corresponding to the coal type with higher heat value is larger, and the output of a coal mill corresponding to the coal type with smaller heat value is smaller, so that the combustion stability of a coal pulverizing system and a boiler of the existing coal-fired unit is improved; and the coal bunker with different heat values changes different coal amounts when the load of the coal-fired unit is changed, thereby being beneficial to the stability of the adjusting system of the coal-fired unit, improving the load changing performance and improving the running safety of the coal-fired unit under the condition of blending and burning various coals.
Example 3
In this embodiment, multiple coal types in the coal-fired unit are subjected to co-combustion in a separate-bin charging mode, where each coal bin corresponds to one coal type, each coal bin corresponds to one coal feeder and one coal mill, an outlet of each coal mill is in butt joint with different coal seams of the coal-fired furnace, that is, each coal type is conveyed to the corresponding coal bin through the coal feeder, then is ground into coal powder through the coal mill, and then different coal powders are sent into the coal-fired furnace through different coal seams to be subjected to co-combustion.
As shown in fig. 3, the system for determining the coal amount of different coal types under the condition of co-combustion of coal in this embodiment includes a calorific value obtaining module 1, an allocation weight determining module 2, and a coal amount determining module 3.
The heat value obtaining module 1 is used for obtaining heat values of coal types corresponding to different coal bunkers;
wherein, the operation and maintenance personnel input the heat value of the coal in the current coal bunker in the input module of the heat value of the coal installed at each coal bunker. If other coal types are burned in a certain coal bunker, the heat value of the new coal type corresponding to the coal bunker is reset.
The distribution weight determining module 2 is used for determining coal distribution weights corresponding to different coal bunkers according to the heat values, wherein the heat values are in positive correlation with the coal distribution weights;
the coal quantity determining module 3 is used for determining the coal quantity of corresponding coal types distributed to different coal bunkers according to the coal quantity distribution weight.
Specifically, after the coal quantity distribution weight corresponding to the same coal bunker is determined, a coal quantity control instruction output by a fuel main control in a coal-fired unit is corrected, and the coal feeders are controlled to convey the coal quantity of corresponding coal types to the corresponding coal bunkers according to the coal quantity control instruction, so that the coal quantity of each coal feeder is subjected to differential processing, instead of conveying the corresponding coal types to each coal feeder in an equivalent manner in a traditional control mode, the output of the coal feeder corresponding to a good coal type (a coal type with a higher heat value) is increased, and the output of the coal feeder corresponding to a poor coal type (a coal type with a lower heat value) is reduced; although the coal feeder is corrected to convey the coal amount of the corresponding coal type to the corresponding coal bunker, the total coal amount of all the coal feeders is kept unchanged, so that the output of the coal feeder for the coal type with poor quality is relatively less, and the grinding pressure of the corresponding coal grinding machine is reduced.
In this embodiment, for the heat values of the coal types corresponding to different coal bunkers, the coal amount distribution weights corresponding to the different coal bunkers are determined, and the coal amounts of the coal types corresponding to the different coal bunkers are determined according to the coal amount distribution weights, so that under the condition that the total coal amount of the coal feeder is not changed, the output of the coal mill corresponding to the coal type with a higher heat value is larger, and the output of the coal mill corresponding to the coal type with a smaller heat value is smaller, so that the combustion stability of the coal pulverizing system and the boiler of the existing coal-fired unit is improved.
Example 4
As shown in fig. 4, the system for determining the coal amount of different coal types in the case of co-combustion of coal in this embodiment is a further improvement of embodiment 3, specifically:
the calculation formula corresponding to the coal amount distribution weight determined by the distribution weight determination module 2 according to the heat value and corresponding to different coal bunkers comprises the following steps:
wherein i and n are positive integers;
miindicating the corresponding heating value of the coal type in the ith coal bunker,n represents the number of coal feeders currently in operation of the coal-fired unit for charging the coal bunker, KiAnd representing the coal amount distribution weight corresponding to the ith coal bunker.
The determining system of the embodiment further comprises a coal amount change determining module 4;
the coal quantity change determining module 4 is used for determining that the coal quantity changed in the coal bunker with the coal quantity distribution weight exceeding the set threshold is larger than the coal quantity changed in the coal bunker with the coal quantity distribution weight not exceeding the set threshold when the load of the coal-fired unit changes.
Specifically, the coal quantity change determining module 4 is configured to determine, when the load of the coal-fired unit increases, that the coal quantity added to the bunker whose coal quantity distribution weight exceeds the set threshold is greater than the coal quantity added to the bunker whose coal quantity distribution weight does not exceed the set threshold;
the coal quantity change determining module 4 is further configured to determine that the reduced coal quantity in the coal bunker with the coal quantity distribution weight exceeding the set threshold is larger than the reduced coal quantity in the coal bunker with the coal quantity distribution weight not exceeding the set threshold when the load of the coal-fired unit is reduced.
The following is a detailed description with reference to examples:
when the coal-fired unit is in a low-load working condition (three coal mills are operated), the heat value of the coal bunker A is 24mj/kg, the heat value of the coal bunker B is 24mj/kg, and the heat value of the coal bunker C is 16mj/kg, so that the coal quantity distribution weights corresponding to the coal bunker A, the coal bunker B and the coal bunker C are respectively 1.125, 1.125 and 0.75.
Assuming that the total coal burning quantity of the coal feeders is 150t/h, if a traditional control mode is selected and the total coal quantity is evenly distributed to each coal feeder, the output of coal mills corresponding to the coal bunker A, the coal bunker B and the coal bunker C is respectively 50t/h, 50t/h and 50 t/h; by adopting the control mode of the embodiment, the coal mill output forces corresponding to the coal bunker A, the coal bunker B and the coal bunker C are respectively 56.25t/h, 56.25t/h and 37.5 t/h. Therefore, the blended combustion control mode of the embodiment adaptively reduces the output of the coal mill of the low-grade coal according to different coal types, effectively relieves the influence of high water content and poor grindability of the low-grade coal on the pulverizing system equipment, and ensures the combustion stability of the boiler.
In the embodiment, the coal amount distribution weights corresponding to different coal bunkers are determined according to the heat values of the coal types corresponding to the different coal bunkers, and the coal amounts of the coal types corresponding to the different coal bunkers are determined according to the coal amount distribution weights, so that under the condition that the total coal amount of the coal feeder is not changed, the output of a coal mill corresponding to the coal type with higher heat value is larger, and the output of a coal mill corresponding to the coal type with smaller heat value is smaller, so that the combustion stability of a coal pulverizing system and a boiler of the existing coal-fired unit is improved; and the coal bunker with different heat values changes different coal amounts when the load of the coal-fired unit is changed, thereby being beneficial to the stability of the adjusting system of the coal-fired unit, improving the load changing performance and improving the running safety of the coal-fired unit under the condition of blending and burning various coals.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (8)
1. A method for determining coal amount of different coal types under the condition of coal-fired co-combustion is characterized by comprising the following steps:
obtaining heat values of coal types corresponding to different coal bunkers;
determining coal amount distribution weights corresponding to different coal bins according to the heat value, wherein the heat value is in positive correlation with the coal amount distribution weights;
determining the coal amount of corresponding coal types distributed to different coal bunkers according to the coal amount distribution weight;
and under the condition of different coal blending combustion, the total coal amount corresponding to the coal feeders of all the coal bins is the same.
2. The method for determining the coal amount of different coal types under the condition of coal-fired co-combustion as claimed in claim 1, wherein the calculation formula corresponding to the step of determining the coal amount distribution weights corresponding to different coal bunkers according to the heat value comprises:
wherein i and n are positive integers;
mirepresenting the heat value corresponding to the coal type in the ith coal bunker, n representing the number of coal feeders currently operated by the coal-fired unit and used for feeding coal to the coal bunker, KiAnd representing the coal amount distribution weight corresponding to the ith coal bunker.
3. The method for determining the coal amount of different coal types under the condition of coal-fired co-combustion according to claim 1, further comprising:
when the load of the coal-fired unit changes, determining that the changed coal amount in the coal bunker with the coal amount distribution weight exceeding a set threshold is larger than the changed coal amount in the coal bunker with the coal amount distribution weight not exceeding the set threshold.
4. The method for determining the coal amount of different coal types under the condition of coal-fired co-combustion as claimed in claim 3, wherein the step of determining that the coal amount changed in the coal bunker with the coal amount distribution weight exceeding the set threshold is larger than the coal amount changed in the coal bunker with the coal amount distribution weight not exceeding the set threshold when the load of the coal-fired unit changes comprises the following steps:
when the load of the coal-fired unit is increased, determining that the coal amount increased in the coal bunker of which the coal amount distribution weight exceeds the set threshold is larger than the coal amount increased in the coal bunker of which the coal amount distribution weight does not exceed the set threshold;
when the load of the coal-fired unit is reduced, determining that the reduced coal amount in the coal bunker of which the coal amount distribution weight exceeds the set threshold is larger than the reduced coal amount in the coal bunker of which the coal amount distribution weight does not exceed the set threshold.
5. A coal quantity determining system for different coal types under the condition of coal-fired co-combustion is characterized by comprising a heat value obtaining module, a distribution weight determining module and a coal quantity determining module;
the heat value acquisition module is used for acquiring the heat values of coal types corresponding to different coal bunkers;
the distribution weight determining module is used for determining coal distribution weights corresponding to different coal bunkers according to the heat values, wherein the heat values are in positive correlation with the coal distribution weights;
the coal quantity determining module is used for determining the coal quantity of corresponding coal types distributed to different coal bunkers according to the coal quantity distribution weight;
and under the condition of different coal blending combustion, the total coal amount corresponding to the coal feeders of all the coal bins is the same.
6. The system for determining the coal amount of different coal types under the condition of coal-fired co-combustion as claimed in claim 5, wherein the calculation formula corresponding to the distribution weight of the coal amount corresponding to different coal bunkers determined by the distribution weight determination module according to the heat value comprises:
wherein i and n are positive integers;
mirepresenting the heat value corresponding to the coal type in the ith coal bunker, n representing the number of coal feeders currently operated by the coal-fired unit and used for feeding coal to the coal bunker, KiAnd representing the coal amount distribution weight corresponding to the ith coal bunker.
7. The system for determining the coal amount of different coal types under the condition of coal-fired co-combustion according to claim 5, wherein the system for determining further comprises a coal amount change determining module;
the coal quantity change determining module is used for determining that the coal quantity changed in the coal bunker with the coal quantity distribution weight exceeding a set threshold is larger than the coal quantity changed in the coal bunker with the coal quantity distribution weight not exceeding the set threshold when the load of the coal-fired unit changes.
8. The system for determining the coal amount of different coal types under the coal-fired co-combustion condition as claimed in claim 7, wherein the coal amount change determining module is configured to determine that the coal amount added to the coal bunker whose coal amount distribution weight exceeds the set threshold is greater than the coal amount added to the coal bunker whose coal amount distribution weight does not exceed the set threshold when the load of the coal-fired unit increases;
the coal quantity change determining module is further used for determining that the reduced coal quantity in the coal bunker with the coal quantity distribution weight exceeding the set threshold is larger than the reduced coal quantity in the coal bunker with the coal quantity distribution weight not exceeding the set threshold when the load of the coal-fired unit is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910354928.2A CN110056903B (en) | 2019-04-29 | 2019-04-29 | Method and system for determining coal amount of different coal types under condition of coal-fired co-combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910354928.2A CN110056903B (en) | 2019-04-29 | 2019-04-29 | Method and system for determining coal amount of different coal types under condition of coal-fired co-combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110056903A CN110056903A (en) | 2019-07-26 |
| CN110056903B true CN110056903B (en) | 2021-03-12 |
Family
ID=67321558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910354928.2A Active CN110056903B (en) | 2019-04-29 | 2019-04-29 | Method and system for determining coal amount of different coal types under condition of coal-fired co-combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110056903B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823620A (en) * | 2019-11-14 | 2020-02-21 | 上海明华电力科技有限公司 | Coal as fired sampling and coal quality analysis system |
| CN110848734B (en) * | 2019-11-26 | 2021-08-27 | 华润电力技术研究院有限公司 | Boiler blended coal selection method and related device |
| CN111506028A (en) * | 2020-03-31 | 2020-08-07 | 华能国际电力股份有限公司长兴电厂 | Cluster type coal-fired scheduling system method for coal plant |
| CN113654075B (en) * | 2021-07-06 | 2024-03-26 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Method and device for predicting lignite blending combustion proportion of coal-fired boiler |
| CN114021373B (en) * | 2021-11-16 | 2023-05-19 | 西安热工研究院有限公司 | Method for fully-loaded blending combustion of economic coal of pulverized coal boiler of large power station |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930895A (en) * | 1982-08-13 | 1984-02-18 | Hitachi Ltd | Modification of coal |
| CN102902215A (en) * | 2012-10-18 | 2013-01-30 | 辽宁省电力有限公司电力科学研究院 | Control method of coal mixed combustion of direct blowing thermal power generating unit |
| CN103679566A (en) * | 2013-12-31 | 2014-03-26 | 李爱云 | Coal blending combustion method of coal-fired power plant |
| CN104848246A (en) * | 2015-06-03 | 2015-08-19 | 上海外高桥第二发电有限责任公司 | Layered calorific value correction mode based different-coal quantity control method |
| CN108332231A (en) * | 2017-12-28 | 2018-07-27 | 神华集团有限责任公司 | The method and apparatus for controlling coal amount |
| CN109062149A (en) * | 2018-07-02 | 2018-12-21 | 浙江浙能技术研究院有限公司 | A kind of coal motor group fuel quantity dispersion amendment and control method based on coal-fired calorific value |
| CN109683634A (en) * | 2018-12-11 | 2019-04-26 | 广东电网有限责任公司 | A kind of coal-burning power plant SO2Exceeded control system and its storage medium |
-
2019
- 2019-04-29 CN CN201910354928.2A patent/CN110056903B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930895A (en) * | 1982-08-13 | 1984-02-18 | Hitachi Ltd | Modification of coal |
| CN102902215A (en) * | 2012-10-18 | 2013-01-30 | 辽宁省电力有限公司电力科学研究院 | Control method of coal mixed combustion of direct blowing thermal power generating unit |
| CN103679566A (en) * | 2013-12-31 | 2014-03-26 | 李爱云 | Coal blending combustion method of coal-fired power plant |
| CN104848246A (en) * | 2015-06-03 | 2015-08-19 | 上海外高桥第二发电有限责任公司 | Layered calorific value correction mode based different-coal quantity control method |
| CN108332231A (en) * | 2017-12-28 | 2018-07-27 | 神华集团有限责任公司 | The method and apparatus for controlling coal amount |
| CN109062149A (en) * | 2018-07-02 | 2018-12-21 | 浙江浙能技术研究院有限公司 | A kind of coal motor group fuel quantity dispersion amendment and control method based on coal-fired calorific value |
| CN109683634A (en) * | 2018-12-11 | 2019-04-26 | 广东电网有限责任公司 | A kind of coal-burning power plant SO2Exceeded control system and its storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 《新型串级热值校正技术在直流锅炉配煤掺烧中的应用》;蒋欣军等;《锅炉技术》;20131130;65-68 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110056903A (en) | 2019-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110056903B (en) | Method and system for determining coal amount of different coal types under condition of coal-fired co-combustion | |
| CN106556008B (en) | Large circulating fluidized bed boiler large scale mixes burned coal gangue coal mud method simultaneously | |
| CN203223912U (en) | Intermediate storage type super nitrogen reduction system for coal-fired boiler coal mill | |
| CN112183924B (en) | Coal blending and blending combustion method for thermal power generating unit | |
| CN108074020A (en) | A kind of intelligence coal mixing combustion optimization method and its system | |
| Liu et al. | Study of briquetted biomass co-firing mode in power plants | |
| CN109062149A (en) | A kind of coal motor group fuel quantity dispersion amendment and control method based on coal-fired calorific value | |
| CN106918038A (en) | A kind of biomass fuel combustion with reduced pollutants system with blower mill powder | |
| CN108800188A (en) | A method of it promoting coal-fired boiler fuel and mixes with flexibility | |
| CN104180384A (en) | System and method of blending combustion of coal type with low ash melting point in coal-fired utility boiler | |
| CN113932245A (en) | Lignite fan mill boiler and safe and efficient bituminous coal blending combustion method thereof | |
| CN110598364A (en) | Method for calculating grinding output of ZGM type medium-speed coal mill | |
| CN109114548B (en) | Combustion coal feeding control method of supercritical circulating fluidized bed boiler | |
| CN113154372A (en) | Method for safely and efficiently co-burning bituminous coal in lignite boiler | |
| CN112862632B (en) | Method and system for blending and burning coal in thermal power plant | |
| CN112325325A (en) | Boiler coal feeding and pulverizing device and method for burning inferior coal | |
| CN210638067U (en) | Stable combustion energy-saving efficiency-improving system for boiler of thermal power plant | |
| JP5255980B2 (en) | Combustion control method and combustion control apparatus for pulverized fuel | |
| CN114321887A (en) | Material adding control method, control device and control system | |
| Prinzing et al. | Impacts of wood cofiring on coal pulverization at the Shawville Generating Station | |
| CN114444277A (en) | Multi-objective optimization-based blended coal combustion method | |
| CN108332231B (en) | Method and apparatus for controlling coal quantity | |
| CN105785759B (en) | Divide storehouse coal blending fired power generating unit coal-supplying amount optimization distribution control method | |
| CN213686895U (en) | A concentrate powder process system for low volatile matter coal kind | |
| CN217559869U (en) | Coal pulverizing system suitable for flexibly blending coal in coal-fired boiler of power plant |
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 |