CN100547296C - The main-piping pressure distribution control method for automatic balancing of parallel boiler - Google Patents
The main-piping pressure distribution control method for automatic balancing of parallel boiler Download PDFInfo
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- CN100547296C CN100547296C CNB2007100287957A CN200710028795A CN100547296C CN 100547296 C CN100547296 C CN 100547296C CN B2007100287957 A CNB2007100287957 A CN B2007100287957A CN 200710028795 A CN200710028795 A CN 200710028795A CN 100547296 C CN100547296 C CN 100547296C
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Abstract
The invention discloses a kind of main-piping pressure distribution control method for automatic balancing of parallel boiler, aim to provide a kind of automaticity height, stable boiler control technology arranged side by side, the main points of technical scheme are that all gas utilization unit steam consumptions and the output quantity of carrying out according to main-piping pressure after PID regulates are gathered calculating, deliver to the boiler load distribution module then, give each boiler by suitable regular allocation, each boiler is then by the flow-control burning that is assigned to, the flow that makes actual load equal to be assigned to, when steam consumption variation or main-piping pressure variation, the load that each boiler is assigned to also changes simultaneously, its actual load also changes thereupon, make main-piping pressure stable, thereby realize regulating automatically; The present invention is used for the control of thermal power plant boiler pressure.
Description
Technical field
The present invention relates to a kind of boiler control technology, be meant a kind of main-piping pressure distribution control method for automatic balancing of parallel boiler especially.
Background technology
At present, it is a difficult problem of automation industry that mother's pipe (steam) pressure of parallel boiler is regulated automatically, in actual production, can't solve, can only adopt manual adjustments, therefore pressure is very unstable, and particularly in the bigger steam power plant of load variations, it is bigger to fluctuate, the security of operation of boiler and gas utilization unit (Steam Turbine or miscellaneous equipment) in serious threat, also causes the reduction of the gas utilization unit thermal efficiency simultaneously.For this reason, applicant of the present invention has invented a kind of main-piping pressure Automatic adjustment method of parallel boiler of uniqueness, has cracked this difficult problem, and has been successfully applied in the actual production.
Summary of the invention
The technical problem to be solved in the present invention provides the main-piping pressure distribution control method for automatic balancing of a kind of automaticity height, stable parallel boiler.
Technical scheme of the present invention is such: a kind of main-piping pressure distribution control method for automatic balancing of parallel boiler, be that all gas utilization unit steam consumptions and the output quantity of carrying out according to main-piping pressure after PID regulates are gathered calculating, deliver to the boiler load distribution module then, give each boiler by suitable regular allocation, each boiler is then by the flow-control burning that is assigned to, the flow that makes actual load equal to be assigned to, when steam consumption variation or main-piping pressure variation, the load that each boiler is assigned to also changes simultaneously, its actual load also changes thereupon, make main-piping pressure stable, thereby realize regulating automatically.
Boiler load distribution module described in the main-piping pressure distribution control method for automatic balancing of above-mentioned parallel boiler is carried out sharing of load as follows: (1) is divided into the distribution state of boiler stoppage in transit, freedom and distributes three kinds, shut down condition wherein is the stoppage in transit boiler, do not participate in sharing of load, free state is meant that this boiler load controls voluntarily, does not also participate in unified the adjusting; (2) according to the gas utilization unit total flow, freely the summation of loading obtains answering distribution load=gas utilization unit total flow-freely load, obtain load again and gather=answer distribution load+flow correction, flow correction=pressure correction * flow correction coefficient wherein, flow correction coefficient=answer distribution load/total steam production; (3) load is gathered the input differentiation element, differentiation element is pressed positive interaction work, comprises that a proportional band is 100% ratio unit, but distribution load=differentiation element output; (4) boiler of distribution state, its distribution load is calculated as follows: but the assumed load of distribution load=distribution load * this stove assumed load/effectively effective assumed load=0 o'clock, is got distribution load=0, the boiler of stoppage in transit, free state, distribution load=0; The summation of the assumed load of the boiler of effective assumed load=all distribution state.
The scope of the assumed load of every boiler described in the main-piping pressure distribution control method for automatic balancing of above-mentioned parallel boiler is manually input on touch-screen.
The scope that pressure described in the main-piping pressure distribution control method for automatic balancing of above-mentioned parallel boiler is set is manually input on touch-screen.
What the pressure correction unit described in the main-piping pressure distribution control method for automatic balancing of above-mentioned parallel boiler was exported is flow.
Pressure correction described in the main-piping pressure distribution control method for automatic balancing of above-mentioned parallel boiler is a pure ratio regulon.
Flow correction unit described in the main-piping pressure distribution control method for automatic balancing of above-mentioned parallel boiler is according to the multiplication factor of the whole Load Regulation of the automatic adjustment of the size of answering distribution load system.
Method of the present invention compared with prior art has following advantage: solved present thermal power plant boiler steam pressure instability in service, technical barrier that can only hand-guided is realized the automatic operating of boiler, and is easy to operate, boiler stable.
Description of drawings
Fig. 1 is a controlling party block diagram of the present invention.
The specific embodiment
Consult shown in Figure 1, the main-piping pressure distribution control method for automatic balancing of parallel boiler of the present invention, its basic principle is that all gas utilization unit steam consumptions and the output quantity of carrying out according to main-piping pressure after PID regulates are gathered calculating, deliver to the boiler load distribution module then, give each boiler by suitable regular allocation, each boiler is then by the flow-control burning that is assigned to, the flow that makes actual load equal to be assigned to, when steam consumption variation or main-piping pressure variation, the load that each boiler is assigned to also changes simultaneously, its actual load also changes thereupon, makes main-piping pressure stable, thereby realizes regulating automatically.
The boiler load distribution module is distributed as follows:
(1) distribution state with boiler is divided into three kinds: stoppage in transit, free, distribution; Free state is meant the control voluntarily of this stove load, does not participate in unified the adjusting; Distribution state is meant that this stove load regulated automatically by distribution module, and boiler promptly participates in unified the adjusting by the load operation that is assigned to.
(2) boiler of distribution state, its distribution load is calculated as follows:
(a) steam turbine total flow=all summations in the main steam flow amount of the steam turbine of operation;
(b) freely load=the own summation of actual load of boiler of " freedom " state;
(c) summation of the assumed load of the boiler of effective assumed load=all " distribution " states;
(d) answer distribution load=steam turbine total flow-freely load;
(e) load gathers=answers distribution load+flow correction;
(f) flow correction=pressure correction * flow correction coefficient, flow correction coefficient=answer distribution load/total steam production;
(g) but the output of distribution load=differentiation element;
(h) but the assumed load of the distribution load=distribution load of the boiler of distribution state * this stove assumed load/effectively effective assumed load=0 o'clock, is got distribution load=0;
(i) boiler of stoppage in transit, free state, distribution load=0.
(3) scope of the assumed load of every boiler all is manually input on touch-screen; From above-mentioned distribution principle as can be known, assumed load only reflects the proportionate relationship of the load that the boiler of all distribution state be should bear, rather than the actual load that should control of boiler, because the load of boiler must change automatically along with the variation of the load of steam turbine and main vapour pressure, could realize the automatic adjusting of total load like this, the distribution load that obtains through pro-rata is only the load that boiler should be controlled.
(4) scope of pressure setting is manually input on touch-screen.
(5) differentiation element is pressed positive interaction work, must comprise that a proportional band is the ratio unit of 100% (multiplication factor is 1); The differential action has the characteristics of longer lag time to design at the burning of chain furnace, and purpose is to allow system that a certain amount of overshoot is arranged.
(6) output of pressure correction unit is flow.
(7) effect of flow correction unit is a multiplication factor of adjusting whole Load Regulation system according to the size of answering distribution load automatically, and the system that makes can both reach than suitable sensitivity when different loads, the load adaptability of raising system.
(8) pressure correction is a pure ratio regulon.
Embodiment
Shunde District, Foshan Shuande gold spins group's thermo-power station, have the coal-burning boiler of four 35T/h, a 6MW takes out unit with fixed attention, a 6MW back pressure type unit, a 3MW back pressure type unit, two 3MW take out unit with fixed attention, and the steam supply of externally powering adopts method of the present invention to control, in this system, main-piping pressure=6MPa, #1 master's steam flow amount=40T/h, #2 master's steam flow amount=60T/h, #3 master's steam flow amount=50T/h # 5 master steam flow amount=100T/h, pressure setting=3.58MPa, pressure correction PI:P=35 I=600, flow correction coefficient=1.0.In actual motion, owing to the automatic adjusting of the variation of loading along with the sharing of load system, the stability of main-piping pressure has fairly obvious raising compared with the conventional control mode of employing, and the load variations of every boiler is also than very big stablizing arranged in the past.
Claims (6)
1. the main-piping pressure distribution control method for automatic balancing of a parallel boiler, it is characterized in that all gas utilization unit steam consumptions and the output quantity of carrying out according to main-piping pressure after PID regulates are gathered calculating, deliver to the boiler load distribution module then, give each boiler by suitable regular allocation, each boiler is then by the flow-control burning that is assigned to, the flow that makes actual load equal to be assigned to, when steam consumption variation or main-piping pressure variation, the load that each boiler is assigned to also changes simultaneously, its actual load also changes thereupon, make main-piping pressure stable, thereby realize regulating automatically; Described boiler load distribution module is carried out sharing of load as follows: (1) is divided into the distribution state of boiler stoppage in transit, freedom and distributes three kinds, shut down condition wherein is the stoppage in transit boiler, do not participate in sharing of load, free state is meant that this boiler load controls voluntarily, does not also participate in unified the adjusting; (2) according to the gas utilization unit total flow, freely the summation of loading obtains answering distribution load=gas utilization unit total flow-freely load, obtain load again and gather=answer distribution load+flow correction, flow correction=pressure correction * flow correction coefficient wherein, flow correction coefficient=answer distribution load/total steam production; (3) load is gathered the input differentiation element, differentiation element is pressed positive interaction work, comprises that a proportional band is 100% ratio unit, but distribution load=differentiation element output; (4) boiler of distribution state, its distribution load is calculated as follows: but the assumed load of distribution load=distribution load * this stove assumed load/effectively effective assumed load=0 o'clock, is got distribution load=0, the boiler of stoppage in transit, free state, distribution load=0; The summation of the assumed load of the boiler of effective assumed load=all distribution state.
2. the main-piping pressure distribution control method for automatic balancing of parallel boiler according to claim 1, the scope that it is characterized in that the assumed load of described every boiler are manually inputs on touch-screen.
3. the main-piping pressure distribution control method for automatic balancing of parallel boiler according to claim 1 is characterized in that also comprising the pressure setting, and the scope that described pressure is set is manually input on touch-screen.
4. the main-piping pressure distribution control method for automatic balancing of parallel boiler according to claim 1, what it is characterized in that the output of described pressure correction unit is flow.
5. the main-piping pressure distribution control method for automatic balancing of parallel boiler according to claim 1 is characterized in that described pressure correction is a pure ratio regulon.
6. the main-piping pressure distribution control method for automatic balancing of parallel boiler according to claim 1 is characterized in that the multiplication factor of described flow correction unit according to the whole Load Regulation of the automatic adjustment of the size of answering distribution load system.
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| CNB2007100287957A CN100547296C (en) | 2007-06-25 | 2007-06-25 | The main-piping pressure distribution control method for automatic balancing of parallel boiler |
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| CNB2007100287957A CN100547296C (en) | 2007-06-25 | 2007-06-25 | The main-piping pressure distribution control method for automatic balancing of parallel boiler |
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| CN101093075A CN101093075A (en) | 2007-12-26 |
| CN100547296C true CN100547296C (en) | 2009-10-07 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5534065B1 (en) | 2013-02-28 | 2014-06-25 | 三浦工業株式会社 | Boiler system |
| CN103512021B (en) * | 2013-10-23 | 2015-09-02 | 北京和隆优化科技股份有限公司 | A kind of header system boiler load fine adjustment control method |
| CN104089269B (en) * | 2014-06-11 | 2016-02-03 | 河北华电石家庄热电有限公司 | A kind of power station piping-main scheme unit boiler load distribution method |
| CN110410820B (en) * | 2019-07-30 | 2021-03-09 | 杭州和利时自动化有限公司 | Big data self-learning fuel automatic adjusting method, system and related components |
| CN113266868B (en) * | 2021-04-15 | 2022-11-29 | 国电汉川发电有限公司 | Multi-unit cooperative heat supply heat load intelligent distribution control system and method |
| CN113356951B (en) * | 2021-07-07 | 2022-06-28 | 中国电建集团山东电力建设有限公司 | IGCC generator combined gas sensible heat recovery steam load distribution method |
| CN114263899B (en) * | 2021-12-09 | 2023-12-19 | 国能(肇庆)热电有限公司 | Boiler load distribution method of cogeneration mother pipe heating unit |
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2007
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Non-Patent Citations (4)
| Title |
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| 母管制机组的炉机负荷分配计算与协调控制. 孙艳，娄幸.自动化仪表，第24卷第10期. 2003 |
| 母管制机组的炉机负荷分配计算与协调控制. 孙艳，娄幸.自动化仪表，第24卷第10期. 2003 * |
| 母管压力调节与负荷分配实施方案. 王瑞珍，于和奎.2003年内蒙古自治区自然科学学术年会优秀论文集. 2003 |
| 母管压力调节与负荷分配实施方案. 王瑞珍，于和奎.2003年内蒙古自治区自然科学学术年会优秀论文集. 2003 * |
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