CN102944010B - Operation control device of biomass direct-combustion circulating fluidized bed boiler - Google Patents
Operation control device of biomass direct-combustion circulating fluidized bed boiler Download PDFInfo
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- CN102944010B CN102944010B CN201210078100.7A CN201210078100A CN102944010B CN 102944010 B CN102944010 B CN 102944010B CN 201210078100 A CN201210078100 A CN 201210078100A CN 102944010 B CN102944010 B CN 102944010B
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Abstract
The invention discloses an operation control device of a biomass direct-combustion circulating fluidized bed boiler. The operation control device is a balanced feeding control device. The operation control device comprises a feeding main regulating loop (1) and multiple feeder balance control circuits (2). The feeder balance control circuits (2) comprise a multi-line balancer (201) and four feeder balance control circuits. After deviation calculation, a feeding control instruction and a controlled variable are input into a feeding main controller; control quantity is calculated by the feeding main controller and is output into the multi-line balancer (201); and a balanced feeding control signal is calculated by the multi-line balancer (201) and is transmitted to the multiple feeder balance control circuits (2) to control feeding amounts of all automatic feeding lines so that biomass fuel is evenly fed into a biomass direct-combustion circulating fluidized bed boiler and thus uniform distribution of a hearth bed temperature is guaranteed. The operation control device is suitable for a biomass direct-combustion circulating fluidized bed boiler, can be successfully used in a first large-scale biomass direct-combustion circulating fluidized bed boiler power plant having a production capacity of 2*50MW, and realizes control of fuel in a biomass direct-combustion circulating fluidized bed boiler, and commercial operation.
Description
Technical field
The present invention relates to the operating control device that one is applicable to biomass direct-fired CFBB (CFB), espespecially a kind of by multi-thread balancer, send balanced feed control signal, control many to stockline, balancedly in stove, carry biomass fuel, to ensure that burner hearth bed temperature is uniformly distributed to meet the feeding control device of the hearth combustion control overflow of large breadth depth ratio.
Background technology
In recent years, the features such as the combustion system that CFBB (CFB) comparatively cleans with it, fuel tolerance are wide, obtain and develop rapidly, biomass direct-fired CFBB power generation project also rises thereupon.Fuel mainly forestry biomass, the agricultural biomass etc. of biomass direct-fired CFBB.Specifically comprise fuel wood, fallen leaves, bark, tree root, forestry processing waste, bagasse, sugarcane top, stalk, shell, fruit stone, corncob etc.Feeding system before biomass direct-fired circulating fluid bed boiler, adopts one-level screw(-type) feeder at the bottom of 2n platform storehouse, and configuration n platform deuterostrophies batcher, forms n bar to stockline, one-level screw(-type) feeder redundancy each other at the bottom of two storehouses on the same line.Due to the unstability of biomass fuel, as changeful in fuel type, fuel quality, fuel characteristic, before biomass direct-fired circulating fluid bed boiler there is batcher bite in feeding system, batcher is wound around the problems such as tripping operation, feeding system blocking, separate unit or multiple stage batcher may be caused to exert oneself and to reduce or tripping operation, even occur that wall scroll or many trip to stockline, have a strong impact on the stability that stokehold feeding system runs, and then it is large to cause boiler combustion to fluctuate.How on the basis of existing equipment and system, alleviate by the method controlled, even solve the combustion fluctuation caused by these problems, become the vital task controlling research on adjustment undoubtedly.
Due to the combustion characteristics of biomass fuel, make to be difficult to meet the Combustion System requirement of biomass direct-fired CFBB at various effective conventional control methods in the past, therefore must for the characteristic of biomass direct-fired CFBB, the method for controlling combustion that exploitation is unique, ensure that biomass fuel balancedly enters burner hearth, maintenance bed temperature is uniformly distributed, and keeps the stability of burning.Thus, ensure that stokehold feeding system respectively steadily, balancedly sends into hearth combustion to the biomass fuel of stockline, maintain biomass electric power plant safety, stable, heavy-duty service.
Summary of the invention
Technical problem to be solved by this invention, is just to provide a kind of control device being applicable to the balanced feeds of two lines about biomass direct-fired CFBB.
Solve the problems of the technologies described above, the technical solution used in the present invention is:
The balanced feeding control device of a kind of biomass direct-fired CFBB, is characterized in that: comprise the feed main regulation loop 1 and the multi-thread Balance route loop 2 of batcher that connect successively;
Described feed main regulation loop 1 is:
The the second digital filter computing module 102 connected successively, feed master control PID controller 105 and the manual/auto handover module 106 of feed master, the second described digital filter computing module 102 inputs total feeding coal-feed feedback, described feed master control PID controller 105 also inputs the output having feed control instruction correcting module 104, described feed control instruction correcting module 104 be input as the first digital filter computing module 101 and hand feed instruction revision directive I, the output of A, the input of the first digital filter computing module 101 is then the feed instruction of boiler master, deviation alarm module 103 is separately had to input the output of the second digital filter computing module 102 and feed control instruction correcting module 104, export the manual/auto handover module 106 of feed master to,
The multi-thread Balance route loop 2 of described batcher is:
The identical batcher Balance route loop 210 of at least 2 lines is distributed in the output of balance module-multi-thread balancer 201, described batcher Balance route loop 210 comprises the manual/auto handover module 211 of the balanced feed of line, line balance module 212, and identical #1, #2 batcher control loop, the output of the manual/auto handover module 211 of the balanced feed of line balance module 212 input line, export respectively to #1, #2 batcher control loop, described batcher control loop comprises bias adjusting module 213, batcher adder Module 215 and the manual/auto handover module 217 of batcher, the output of batcher adder Module 215 input line balance module 212 and bias adjusting module 213, last output batcher instruction after exporting the manual/auto handover module 217 of batcher to.
The control inputs of described feed master control PID controller 105 has: A, I, T;
The amount tracking of described feed master control PID controller 105 is each line feed average magnitude calculated by multi-thread balancer 201, so just can ensure the controlled quentity controlled variable that master control PID controller exports, and is the biomass feeding amount of every bar line.
The control inputs of the manual/auto handover module of the balanced feed of described line 211 and the manual/auto handover module 217 of batcher has: A, I, T;
Beneficial effect: the invention provides a kind of control device being applicable to the balanced feed of biomass direct-fired CFBB, the present invention has been used successfully to First 2 × 50MW macro-organism upright combustion CFBB power plant, the fuel achieving boiler well controls, and makes this power plant successfully achieve comercial operation.
Accompanying drawing explanation
Fig. 1 is biomass direct-fired CFBB of the present invention balanced feeding control device embodiment theory of constitution figure;
Fig. 2 is the feed main regulation loop enlarged drawing of Fig. 1 embodiment;
Fig. 3 is many batchers Balance route loop enlarged drawing of Fig. 1 embodiment.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the present invention is described in further detail.
The balanced feeding control device embodiment of of the present invention biomass direct-fired CFBB as shown in Figure 1, comprises feed main regulation loop 1 and the multi-thread Balance route loop 2 of batcher.
See Fig. 2, feed main regulation loop 1 contains: the first digital filter computing module 101, second digital filter computing module 102, deviation alarm module 103, feed instruction correcting module 104, feed master control PID controller 105 and the manual/auto handover module 106 of feed master.
First digital filter computing module 101 inputs the feed instruction of boiler master, second digital filter computing module 102 inputs the actual feeding coal of whole batcher total feeding coal comprehensively-feed feedback, after two filtering operation modules carry out first-order filtering process to feed instruction and total feeding coal, form stable signal and export.
Feed instruction correcting module 104 receives the steady feed instruction that the first digital filter computing module 101 exports, and adds hand feed instruction revision directive I, A, and it exports and form final feed control instruction, exports feed master control PID controller 105 to;
The feed instruction of deviation alarm module 103 smoothing input and steadily actual total feeding coal, when both deviations are excessive, its output signal is just by the manual/auto handover module 106 of feed master, and excision feed is automatic.
Being input as of feed master control PID controller 105: the steady total actual feeding coal signal that feed instruction correcting module 104 exports and the second digital filter computing module 102 exports, then export control instruction by the manual/auto handover module 106 of feed master, deliver to the multi-thread Balance route loop 2 of multi-thread batcher.
See Fig. 1 to Fig. 3, batcher multi-thread coordination loop 2 is by multi-thread balancer 201, and A, B, C, D line-many batchers Balance route loop 210,220,230,240 formation that four identical.
Illustrate, see Fig. 3 for A line many batchers Balance route loop 210 below.
The input of multi-thread balancer 201 is adjustment signals that the manual/auto handover module 106 of feed master in feed main regulation loop 1 is sent, and its tracking is input as the feeding coal sent in A, B, C, D line each many batchers Balance route loop.
When each line of A, B, C, D sends trace command, multi-thread balancer 201 is according to the manual/auto operational pattern of handover module 221,231,241,251 of each line and the tracking mode of definition, after average magnitude process is done to each line feeding coal, form tracking signal and export to multi-thread balancer 201, export through the manual/auto handover module 106 of feed master again, deliver to the tracking end of feed master control PID controller 105, make the average feeding coal of output tracking A, B, C, D line of feed master controller.
When the manual/auto handover module 221,231,241,251 of each line switches to automated manner, multi-thread balancer 201 is by dropping into automatically to stockline number, calculate balanced feed control signal, deliver to each many batchers Balance route loop, control the control loop of each input autofeed line, balancedly in stove, carry biomass fuel.
When each line of A, B, C, D is all in automated manner, if the batcher having certain to drop on autofeed line (as D line) trips due to during the faults such as appearance blocking, winding, originally the feeding coal instruction distributing to four lines is recalculated by multi-thread balancer 201 immediately, distribute to the normal each line of A, B, C run, with keep occur certain there is cut-off to stockline time, the total feeding coal entering burner hearth is constant.Equally, if original three are dropped into automatically, wherein a tripping operation, recalculates the feeding coal instruction originally distributing to three lines immediately, distributes to normal two lines run.
Many batchers Balance route loop 210 is made up of the manual/auto handover module of the balanced feed of this line 211, this line balance module 212, #1 batcher bias adjusting module 213, #1 batcher adder Module 215, the manual/auto handover module of #1 batcher 217, #2 batcher bias adjusting module 213, the manual/auto handover module 217 of #2 batcher adder Module 215, #2 batcher.
In many batchers Balance route loop, the feed command signal that feed main regulation loop 1 exports is after multi-thread balancer 201 carries out control instruction Distribution Calculation, be delivered to each line of A, B, C, D many batchers Balance route loop, for A line: feed command signal first delivers to the manual/auto handover module 211 of this line feed, realizes the switching of manual/auto control signal; The output signal of handover module 211 delivers to line balance module 212, by it, this line feed command signal is reallocated to #1, #2 feed control loop, this line #1, #2 batcher is also sent into biological quality in stove as amount tracking by this line balance module 212, send multi-thread balance module 201 to through the manual/auto handover module of this line feed 211, form the biomass feeding amount tracking signal in feed main regulation loop 1.
#1 batcher control loop controls biasing module 213 by #1 feed, #1 feed controls comprehensive addition module 215, #1 feed controls manual/auto handover module 217 and forms.The line traffic control instruction calculated by line balance module 212, delivers to comprehensive addition module 215, and receive the output of biasing module 213 at another input of addition module 215, the output of addition module 215 is delivered to #1 feed and controlled manual/auto handover module 217; #1 feed controls manual/auto handover module 217 and exports final controlled quentity controlled variable as #1 batcher, gives #1 batcher.
When manual/auto handover module 217 is in manual mode, this control loop is just in tracking mode, the feeding coal of #1 batcher and the deviation of line balance module 212 control instruction are as following the tracks of offset signal, by comprehensive addition module 215, deliver to and control biasing module 213, form the output tracking offset signal of No. 1 batcher, the output quantity that the biological quality at this moment in feeding stove is manually adjusted on manual/auto handover module by operations staff realizes; When module 217 switches to automated manner, this control loop is just in auto state, the line feeding coal command signal that balance module 212 exports, add that the offset signal of biasing module 213 forms final control instruction, through handover module 217, directly give No. 1 batcher, automatically control to send into the biological quality in stove.
#2 feed control loop controls biasing module 214, #1 feed by: # No. 2 feed and controls comprehensive addition module 216, #1 feed and control manual/auto handover module 218 and form, and connected mode is identical with #1 feed control loop.
When #1, #2 feed control loop is all in automated manner, line balance module 212 just calculates average line feeding control instruction and delivers to #1, #2 feed control loop respectively, in #1, #2 feed control loop, feeding control instruction adds the offset signal amount on each loop, delivers to #1, #2 batcher respectively; If when the offset signal of #1 feed controller being turned down, the offset signal of #2 feed controller can equivalent strengthen; And if there is blocking, solve the faults such as winding in #2 feed controller, when #2 feed controller is tripped, the instruction of line feeding coal is just all transferred to by line balance module 212, the #2 batcher of normal operation, kept occurring certain feed controller when exerting oneself abnormal, the total feeding coal on this line is constant.
Claims (1)
1. the balanced feeding control device of biomass direct-fired CFBB, is characterized in that: comprise the feed main regulation loop (1) and the multi-thread Balance route loop (2) of batcher that connect successively;
Described feed main regulation loop (1) is:
The the second digital filter computing module (102), feed master control PID controller (105) and the manual/auto handover module of feed master (106) that connect successively, the second described digital filter computing module (102) inputs total feeding coal-feed feedback, described feed master control PID controller (105) also inputs the output having feed control instruction correcting module (104), described feed control instruction correcting module (104) be input as the first digital filter computing module (101) and hand feed instruction revision directive (I, A) output, the input of the first digital filter computing module (101) is then the feed instruction of boiler master, deviation alarm module (103) is separately had to input the output of the second digital filter computing module (102) and feed control instruction correcting module (104), export the manual/auto handover module of feed master (106) to,
The multi-thread Balance route loop (2) of described batcher is:
The identical batcher Balance route loop (210) of at least 2 lines is distributed in the output of balance module-multi-thread balancer (201), described batcher Balance route loop (210) comprises the balanced manual/auto handover module of the feed (211) of line, line balance module (212), and identical #1, #2 batcher control loop, the output of the balanced manual/auto handover module of the feed (211) of line balance module (212) input line, export respectively to #1, #2 batcher control loop, described batcher control loop comprises bias adjusting module (213), batcher adder Module (215) and the manual/auto handover module of batcher (217), the output of batcher adder Module (215) input line balance module (212) and bias adjusting module (213), export the manual/auto handover module of batcher (217) to and finally export batcher instruction afterwards,
The control inputs of described feed master control PID controller (105) has A, I, T, and the amount tracking of described feed master control PID controller (105) is each line feed average magnitude calculated by multi-thread balancer (201);
The control inputs of the balanced manual/auto handover module of the feed (211) of described line and the manual/auto handover module of batcher (217) has A, I, T.
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| CN201210078100.7A CN102944010B (en) | 2012-03-22 | 2012-03-22 | Operation control device of biomass direct-combustion circulating fluidized bed boiler |
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| CN201210078100.7A CN102944010B (en) | 2012-03-22 | 2012-03-22 | Operation control device of biomass direct-combustion circulating fluidized bed boiler |
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| CN102944010B true CN102944010B (en) | 2015-07-22 |
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| CN106371387B (en) * | 2016-10-31 | 2020-06-19 | 广州特种承压设备检测研究院 | Full-automatic boiler remote intelligent monitoring and alarm reminding system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480682A (en) * | 2003-07-02 | 2004-03-10 | 北京和利时系统工程股份有限公司 | Automatic regulating system for combustion process of circulating fluid bed in boiler |
| CN101949536A (en) * | 2010-09-14 | 2011-01-19 | 广东电网公司电力科学研究院 | Balanced coal supply control device of large circulating fluidized bed boiler |
| CN202647742U (en) * | 2012-03-22 | 2013-01-02 | 广东电网公司电力科学研究院 | Operation control device for biomass direct combustion circulating fluidized bed boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10288301A (en) * | 1997-04-10 | 1998-10-27 | Ishikawajima Harima Heavy Ind Co Ltd | Apparatus for correcting fuel calorie of coal-fired boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480682A (en) * | 2003-07-02 | 2004-03-10 | 北京和利时系统工程股份有限公司 | Automatic regulating system for combustion process of circulating fluid bed in boiler |
| CN101949536A (en) * | 2010-09-14 | 2011-01-19 | 广东电网公司电力科学研究院 | Balanced coal supply control device of large circulating fluidized bed boiler |
| CN202647742U (en) * | 2012-03-22 | 2013-01-02 | 广东电网公司电力科学研究院 | Operation control device for biomass direct combustion circulating fluidized bed boiler |
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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 Guangdong city of Guangzhou Province Dongfeng East Road, No. 8 Guangdong water Kong EPRI high pressure Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |