CN112902221A - Interlocking protection control system of coal-fired unit - Google Patents
Interlocking protection control system of coal-fired unit Download PDFInfo
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- CN112902221A CN112902221A CN202110282695.7A CN202110282695A CN112902221A CN 112902221 A CN112902221 A CN 112902221A CN 202110282695 A CN202110282695 A CN 202110282695A CN 112902221 A CN112902221 A CN 112902221A
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- induced draft
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- 238000001514 detection method Methods 0.000 claims abstract description 73
- 239000003245 coal Substances 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 description 4
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 102100031033 CCR4-NOT transcription complex subunit 3 Human genes 0.000 description 3
- 101000919663 Homo sapiens CCR4-NOT transcription complex subunit 3 Proteins 0.000 description 3
- 102100031024 CCR4-NOT transcription complex subunit 1 Human genes 0.000 description 2
- 102100031025 CCR4-NOT transcription complex subunit 2 Human genes 0.000 description 2
- 102100032981 CCR4-NOT transcription complex subunit 4 Human genes 0.000 description 2
- 101000919674 Caenorhabditis elegans CCR4-NOT transcription complex subunit let-711 Proteins 0.000 description 2
- 101001092183 Drosophila melanogaster Regulator of gene activity Proteins 0.000 description 2
- 101000919672 Homo sapiens CCR4-NOT transcription complex subunit 1 Proteins 0.000 description 2
- 101000919667 Homo sapiens CCR4-NOT transcription complex subunit 2 Proteins 0.000 description 2
- 101000942594 Homo sapiens CCR4-NOT transcription complex subunit 4 Proteins 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/005—Regulating air supply or draught using electrical or electromechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
Abstract
The invention discloses an interlocking protection control system of a coal-fired unit, which comprises a first AND gate module, a first NOT-taking module, a second NOT-taking module, a first time delay module, a second AND gate module, a third AND gate module, a first OR gate module, a fourth AND gate module, a fifth AND gate module, a third NOT-taking module, a fourth NOT-taking module, a second time delay module, a sixth AND gate module, a seventh AND gate module, a second OR gate module, an eighth AND gate module, a ninth AND gate module, an air blower A operation detection signal output end, an air blower B operation detection signal output end, an air blower C operation detection signal output end, an air blower A stop detection signal output end, an air blower B stop detection signal output end, an air blower A trip control end and an air blower B trip control end, and can effectively avoid the false operation rejection of the air blower, the double-side fans are linked, and the combustion stability of the hearth is effectively ensured.
Description
Technical Field
The invention belongs to the field of thermal power generation, and relates to an interlocking protection control system of a coal-fired unit.
Background
The air smoke system of the coal-fired unit is an important component of a boiler combustion system, the air smoke control system is an important component of an automatic unit control system and is also an important component of unit coordinated control, and an induced draft fan and an air feeder are main devices of the air smoke system, so that the safety and stability of unit combustion are seriously influenced for the control of the induced draft fan.
For the unit with double rows of auxiliary machines, in the normal operation process, the furnace pressure of the boiler is kept constant, but due to special working conditions, the induced draft fan stops suddenly, and if the forced draft fan does not make corresponding actions, the furnace pressure can be greatly increased, so that the MFT action of the boiler is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an interlocking protection control system of a coal-fired unit, which can effectively avoid the malfunction and misoperation of a blower, realize linkage of double-side fans and effectively ensure the combustion stability of a hearth.
In order to achieve the purpose, the interlocking protection control system of the coal-fired unit comprises a first AND gate module, a first NOT removing module, a second NOT removing module, a first time delay module, a second AND gate module, a third AND gate module, a first OR gate module, a fourth AND gate module, a fifth AND gate module, a third NOT removing module, a fourth NOT removing module, a second time delay module, a sixth AND gate module, a seventh AND gate module, a second OR gate module, an eighth AND gate module, a ninth AND gate module, an air feeder A operation detection signal output end, an air feeder B operation detection signal output end, an air feeder C operation detection signal output end, an air feeder A stop detection signal output end, an air feeder B stop detection signal output end, an air feeder C stop detection signal output end, an air feeder A trip control end and an air feeder B trip control end;
the input end of the first AND gate module is connected with the operation detection signal output end of the blower A and the operation detection signal output end of the blower B;
the input end of the first non-taking module is connected with the operation detection signal output end of the induced draft fan B;
the input end of the second non-taking module is connected with the operation detection signal output end of the induced draft fan C;
the input end of the first delay module is connected with the output end of the first negation taking module;
the input end of the second AND gate module is connected with the output end of the first AND gate module, the operation detection signal output end of the induced draft fan B and the output end of the second negation module;
the input end of the third AND gate module is connected with the output end of the first AND gate module, the output end of the first delay module and the operation detection signal output end of the induced draft fan C;
the input end of the first OR gate module is connected with the output end of the second AND gate module and the output end of the third AND gate module;
the input end of the fourth AND gate module is connected with the stop detection signal output end of the induced draft fan A and the output end of the first OR gate module, and the output end of the fourth AND gate module is connected with the trip control end of the blower A;
the input end of the fifth AND gate module is connected with the operation detection signal output end of the blower A and the operation detection signal output end of the blower B;
the input end of the third non-taking module is connected with the operation detection signal output end of the induced draft fan A;
the input end of the fourth non-sampling module is connected with the operation detection signal output end of the induced draft fan C;
the output end of the third non-sampling module is connected with the input end of the second delay module;
the input end of the sixth AND gate module is connected with the output end of the fifth AND gate module, the operation detection signal output end of the induced draft fan A and the output end of the fourth negation taking module;
the input end of the seventh AND gate module is connected with the operation detection signal output end of the induced draft fan C, the output end of the second delay module and the output end of the fifth AND gate module;
the input end of the second OR gate module is connected with the output end of the sixth AND gate module and the output end of the seventh AND gate module, the output end of the second OR gate module and the stop detection signal output end of the induced draft fan B are connected with the input end of the eighth AND gate module, and the output end of the eighth AND gate module is connected with the trip control end of the blower B;
the input end of the ninth AND gate module is connected with the stop detection signal output end of the induced draft fan A, the stop detection signal output end of the induced draft fan B and the stop detection signal output end of the induced draft fan C, and the output end of the ninth AND gate module is connected with the trip control end of the blower A and the trip control end of the blower B.
The delay time of the first delay module is 3 s.
The delay time of the second delay module is 3 s.
And when the running quantity of the air blowers A and B is greater than that of the induced draft fans A, B and C, tripping the air blowers A.
And when the running quantity of the air blowers A and B is greater than that of the induced draft fans A, B and C, tripping the air blower B.
When the induced draft fan A, the induced draft fan B and the induced draft fan C are all stopped, the blower A and the blower B are all tripped.
The invention has the following beneficial effects:
when the interlocking protection control system of the coal-fired unit works specifically, when the running number of the air blowers A and B is larger than that of the induced draft fan A, the induced draft fan B and the induced draft fan C, the air blower A is tripped or the air blower B is tripped; when the induced draft fan A, the induced draft fan B and the induced draft fan C are all stopped, the blower A and the blower B are all tripped, so that the pressure balance in the hearth is maintained.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the interlock protection control system of a coal-fired unit according to the present invention includes a first AND gate module AND1, a first negation taking module NOT1, a second negation taking module NOT2, a first delay module TD _ ON, a second AND gate module AND2, a third AND gate module AND3, a first OR gate module OR1, a fourth AND gate module AND4, a fifth AND gate module AND5, a third negation taking module NOT3, a fourth negation taking module NOT4, AND a second delay module TD _ ON2, the system comprises a sixth AND gate module AND6, a seventh AND gate module AND7, a second OR gate module OR2, an eighth AND gate module AND8, a ninth AND gate module AND9, a blower A operation detection signal output end, a blower B operation detection signal output end, an induced draft fan C operation detection signal output end, an induced draft fan A stop detection signal output end, an induced draft fan B stop detection signal output end, an induced draft fan C stop detection signal output end, a blower A trip control end AND a blower B trip control end;
the input end of the first AND gate module AND1 is connected with the output end of the running detection signal of the blower A AND the output end of the running detection signal of the blower B;
the input end of the first NOT1 is connected with the output end of the operation detection signal of the induced draft fan B;
the input end of the second NOT2 is connected with the output end of the operation detection signal of the induced draft fan C;
the input end of the first delay module TD _ ON1 is connected with the output end of the first NOT 1;
the input end of the second AND-gate module AND2 is connected with the output end of the first AND-gate module AND1, the output end of the operation detection signal of the induced draft fan B AND the output end of the second NOT 2;
the input end of the third AND-gate module AND3 is connected with the output end of the first AND-gate module AND1, the output end of the first delay module TD _ ON1 AND the output end of the operation detection signal of the induced draft fan C;
the input terminal of the first OR-gate OR1 is connected to the output terminal of the second AND-gate AND2 AND the output terminal of the third AND-gate AND 3;
the input end of a fourth AND gate module AND4 is connected with the stop detection signal output end of the induced draft fan A AND the output end of the first OR gate module OR1, AND the output end of the fourth AND gate module AND4 is connected with the trip control end of the blower A;
the input end of the fifth AND gate module AND5 is connected with the output end of the running detection signal of the blower A AND the output end of the running detection signal of the blower B;
the input end of the third non-extracting module NOT3 is connected with the output end of the operation detection signal of the induced draft fan A;
the input end of the fourth non-extracting module NOT4 is connected with the operation detection signal output end of the induced draft fan C;
the output end of the third negation taking module NOT3 is connected with the input end of the second delay module TD _ ON 2;
the input end of the sixth AND-gate module AND6 is connected with the output end of the fifth AND-gate module AND5, the output end of the operation detection signal of the induced draft fan a AND the output end of the fourth negation taking module NOT 4;
the input end of the seventh AND-gate AND7 is connected with the operation detection signal output end of the induced draft fan C, the output end of the second delay module TD _ ON2 AND the output end of the fifth AND-gate AND 5;
the input end of the second OR gate module OR2 is connected with the output end of the sixth AND gate module AND6 AND the output end of the seventh AND gate module AND7, the output end of the second OR gate module OR2 AND the output end of the induced draft fan B stop detection signal are connected with the input end of the eighth AND gate module AND8, AND the output end of the eighth AND gate module AND8 is connected with the trip control end of the blower B;
the input end of the ninth AND-gate module AND9 is connected with the stop detection signal output end of the induced draft fan a, the stop detection signal output end of the induced draft fan B AND the stop detection signal output end of the induced draft fan C, AND the output end of the ninth AND-gate module AND9 is connected with the trip control end of the blower a AND the trip control end of the blower B.
The delay time of the first delay module TD _ ON1 is 3 s; the delay time of the second delay module TD _ ON2 is 3 s.
When the system works, when the running quantity of the air feeder A and the air feeder B is larger than that of the induced draft fan A, the induced draft fan B and the induced draft fan C, the air feeder A is tripped; when the running number of the air feeder A and the air feeder B is larger than that of the induced draft fan A, the induced draft fan B and the induced draft fan C, the air feeder B is tripped; when the induced draft fan A, the induced draft fan B and the induced draft fan C are all stopped, the blower A and the blower B are all tripped.
The invention takes the control scheme of million units of a double-row air-smoke system consisting of two electric blowers, two steam-driven induced draft fans and one electric induced draft fan as an example, and builds a protection control method for tripping the blowers, wherein the operation number of the blowers is larger than the operation number of the induced draft fans, by applying the existing DCS functional block, the number of the induced draft fans is one more than the number of the blowers, when the operation number of the blowers is larger than the number of the induced draft fans, the air output is too large, the air output is too small, so that the hearth pressure is too high, the normal operation of the boiler unit is influenced, and the MFT protection action is triggered when the hearth pressure is serious.
Claims (6)
1. The interlocking protection control system of the coal-fired unit is characterized by comprising a first AND gate module (AND1), a first NOT taking module (NOT1), a second NOT taking module (NOT2), a first time delay module (TD _ ON), a second AND gate module (AND2), a third AND gate module (AND3), a first OR gate module (OR1), a fourth AND gate module (AND4), a fifth AND gate module (AND5), a third NOT3), a fourth NOT taking module (NOT4), a second time delay module (TD _ ON2), a sixth AND gate module (AND6), a seventh AND gate module (AND7), a second OR gate module (OR2), an eighth AND gate module (AND8), a ninth AND gate module (AND9), a blower A operation detection signal output end, a blower B operation detection signal output end, a blower C operation detection signal output end, a blower A stop detection signal output end, AND B stop detection signal output end, The induced draft fan C stops detecting the signal output end, blower A trip control end and blower B trip control end;
the input end of the first AND gate module (AND1) is connected with the output end of the running detection signal of the blower A AND the output end of the running detection signal of the blower B;
the input end of the first NOT1 module is connected with the output end of the operation detection signal of the induced draft fan B;
the input end of the second NOT-taking module (NOT2) is connected with the operation detection signal output end of the induced draft fan C;
the input end of the first time delay module (TD _ ON1) is connected with the output end of the first NOT 1;
the input end of the second AND gate module (AND2) is connected with the output end of the first AND gate module (AND1), the output end of the operation detection signal of the induced draft fan B AND the output end of the second NOT 2;
the input end of the third AND gate module (AND3) is connected with the output end of the first AND gate module (AND1), the output end of the first delay module (TD _ ON1) AND the operation detection signal output end of the induced draft fan C;
the input of the first OR-gate block (OR1) AND the output of the second AND-gate block (AND2) AND
The output terminal of the third AND-gate block (AND 3);
the input end of a fourth AND gate module (AND4) is connected with the stop detection signal output end of the induced draft fan A AND the output end of the first OR gate module (OR1), AND the output end of the fourth AND gate module (AND4) is connected with the trip control end of the blower A;
the input end of a fifth AND gate module (AND5) is connected with the output end of the running detection signal of the blower A AND the output end of the running detection signal of the blower B;
the input end of the third non-extracting module (NOT3) is connected with the operation detection signal output end of the induced draft fan A;
the input end of the fourth non-extracting module (NOT4) is connected with the operation detection signal output end of the induced draft fan C;
the output end of the third NOT3 is connected with the input end of the second time delay module (TD _ ON 2);
the input end of the sixth AND-gate module (AND6) is connected with the output end of the fifth AND-gate module (AND5), the output end of the operation detection signal of the induced draft fan A AND the output end of the fourth NOT 4;
the input end of the seventh AND gate module (AND7) is connected with the operation detection signal output end of the induced draft fan C, the output end of the second delay module (TD _ ON2) AND the output end of the fifth AND gate module (AND 5);
the input end of the second OR gate module (OR2) is connected with the output end of the sixth AND gate module (AND6) AND the output end of the seventh AND gate module (AND7), the output end of the second OR gate module (OR2) AND the output end of the induced draft fan B stop detection signal are connected with the input end of the eighth AND gate module (AND8), AND the output end of the eighth AND gate module (AND8) is connected with the trip control end of the blower B;
the input end of a ninth AND gate module (AND9) is connected with the stop detection signal output end of the induced draft fan A, the stop detection signal output end of the induced draft fan B AND the stop detection signal output end of the induced draft fan C, AND the output end of the ninth AND gate module (AND9) is connected with the trip control end of the blower A AND the trip control end of the blower B.
2. The interlocking protection control system of a coal-fired unit according to claim 1, characterized in that the delay time of the first delay module (TD _ ON1) is 3 s.
3. The interlocking protection control system of a coal-fired unit according to claim 1, characterized in that the delay time of the second delay module (TD _ ON2) is 3 s.
4. The interlock protection control system for a coal fired unit according to claim 1, wherein when the number of operations in blower a and blower B is greater than the number of operations in induced draft fan a, induced draft fan B and induced draft fan C, blower a is caused to trip.
5. The interlock protection control system for a coal fired unit according to claim 1, wherein when the number of operations in blower a and blower B is greater than the number of operations in induced draft fan a, induced draft fan B and induced draft fan C, blower B is caused to trip.
6. The interlock protection control system of a coal-fired unit according to claim 1, wherein when the induced draft fan a, the induced draft fan B and the induced draft fan C are all stopped, the blower a and the blower B are both tripped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110282695.7A CN112902221A (en) | 2021-03-16 | 2021-03-16 | Interlocking protection control system of coal-fired unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110282695.7A CN112902221A (en) | 2021-03-16 | 2021-03-16 | Interlocking protection control system of coal-fired unit |
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| CN112902221A true CN112902221A (en) | 2021-06-04 |
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| CN202110282695.7A Pending CN112902221A (en) | 2021-03-16 | 2021-03-16 | Interlocking protection control system of coal-fired unit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08284879A (en) * | 1995-04-07 | 1996-10-29 | Toshiba Corp | Blower control device |
| CN202209673U (en) * | 2011-06-30 | 2012-05-02 | 内蒙古电力勘测设计院 | Trip control system for circulating fluidized bed boiler |
| CN103574578A (en) * | 2013-10-25 | 2014-02-12 | 广东电网公司电力科学研究院 | Anti-implosion control method for boiler furnace and smoke system in 1045 MW thermal power generating unit by adopting three-in-one induced draft fan |
| CN107166361A (en) * | 2017-05-23 | 2017-09-15 | 国网山东省电力公司电力科学研究院 | Pressure fan automatic control system and method during fired power generating unit air-introduced machine failure load shedding |
| CN107228088A (en) * | 2017-05-31 | 2017-10-03 | 上海明华电力技术工程有限公司 | A kind of pressure fan RB control methods based on blower system status monitoring |
| CN110322018A (en) * | 2019-06-19 | 2019-10-11 | 上海电力学院 | A kind of power plant fans fault early warning system based on fuzzy reasoning |
-
2021
- 2021-03-16 CN CN202110282695.7A patent/CN112902221A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08284879A (en) * | 1995-04-07 | 1996-10-29 | Toshiba Corp | Blower control device |
| CN202209673U (en) * | 2011-06-30 | 2012-05-02 | 内蒙古电力勘测设计院 | Trip control system for circulating fluidized bed boiler |
| CN103574578A (en) * | 2013-10-25 | 2014-02-12 | 广东电网公司电力科学研究院 | Anti-implosion control method for boiler furnace and smoke system in 1045 MW thermal power generating unit by adopting three-in-one induced draft fan |
| CN107166361A (en) * | 2017-05-23 | 2017-09-15 | 国网山东省电力公司电力科学研究院 | Pressure fan automatic control system and method during fired power generating unit air-introduced machine failure load shedding |
| CN107228088A (en) * | 2017-05-31 | 2017-10-03 | 上海明华电力技术工程有限公司 | A kind of pressure fan RB control methods based on blower system status monitoring |
| CN110322018A (en) * | 2019-06-19 | 2019-10-11 | 上海电力学院 | A kind of power plant fans fault early warning system based on fuzzy reasoning |
Non-Patent Citations (1)
| Title |
|---|
| 柳建民: ""燃煤锅炉送引风机联锁控制策略对比与分析"", 《工程建设与设计》 * |
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