CN103225820A - Chain grate furnace combustion optimization control system - Google Patents
Chain grate furnace combustion optimization control system Download PDFInfo
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- CN103225820A CN103225820A CN2013101746293A CN201310174629A CN103225820A CN 103225820 A CN103225820 A CN 103225820A CN 2013101746293 A CN2013101746293 A CN 2013101746293A CN 201310174629 A CN201310174629 A CN 201310174629A CN 103225820 A CN103225820 A CN 103225820A
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- stove tail
- temperature
- air quantity
- control system
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Abstract
The invention discloses a chain grate furnace combustion optimization control system. The chain grate furnace combustion optimization control system is provided with a furnace tail temperature difference controller, a left side air amount executor, a right side air amount executor, and a left side temperature measurement instrument and a right side temperature measurement instrument at the furnace tail. The chain grate furnace combustion optimization control system aims at the problem of low thermal efficiency caused by the unbalance combustion in a furnace because the coal feeding on the left side and the right side are nonuniform, and the chain grate furnace combustion optimization control can be realized by adjusting the amount of the air flow entering the left side and the right side of an air chamber according to the difference between the left temperature and the right temperature of the furnace tail.
Description
Technical field
The present invention relates to chain furnace control technology field, relate in particular to a kind of mode chain furnace combustion optimal control system.
Background technology
At present China is having with Industrial Boiler about 500,000, and coal consumption accounts for about 30% of whole nation consumption coal total amount, is chain furnace and the overwhelming majority adopts in these Industrial Boilers.Compare with other type of furnace, chain furnace is simple to operate, maintenance cost is low, but also have a lot of problems: the thermal efficiency is low, undercapacity, waste energy, contaminated environment, its main cause is that the chain furnace design is outmoded, monitoring means are incomplete, and poor operability is mainly reflected in supply air system and adopts both sides level air-supply, can only adjust total air output automatically, and accurate operations such as stove inner air-distributing need be by finishing manually.
At chain furnace actual motion present situation, adopting control technology to improve boiler thermal output obviously is effective means.Usually adjust the control method of wind coal proportion or system according to flue gas oxygen content in the prior art and realize Combustion Process Control chain furnace, ratio control technology or the fuzzy control technologies etc. of adopting more, related technology is just by adjusting the air-supply total blast volume, obtain a rational coefficient of excess air, realize boiler combustion process control.Yet, in the chain furnace actual motion, burner hearth inside tends to occur the unbalanced problem of burning, as coal inequality under the coal bunker, can cause coal seam thickness inequality on the fire grate of the left and right sides, cause certain side incomplete combustion, prior art can't control effectively to it automatically, still need operating personnel to check and operate adjustment to the scene, adjust the untimely boiler thermal output that makes easily and obviously descend.
In sum, prior art still exists certain limitation and defective, therefore develops native system.
Summary of the invention
Problem to be solved by this invention is: invent a kind of mode chain furnace combustion optimal control system, solve because of the inhomogeneous chain furnace left and right sides fire grate burning imbalance problem that causes of coal down, improve boiler thermal output, reach the purpose of reduction fuel consumption.
A kind of mode chain furnace combustion optimal control system is provided with stove tail differential temperature controller, selector A, selector B, adder, subtracter, left side air quantity manual operator and actuator, three o'clock wind operator and actuator, stove tail left side temperature measuring instrument, stove tail right side temperature measuring instrument; Wherein left and right side air quantity actuator is installed on the horizontal air supply duct in air compartment both sides as blast main road lateral, be used for controlling respectively the branch total blast volume that enters each side of air compartment, stove tail left and right side temperature measuring instrument is installed in the stove tail respectively, detects the temperature at fire grate center line two side deslagging positions respectively.
The difference of stove tail left and right side temperature is as the measured value of stove tail differential temperature controller, stove tail differential temperature controller adopts pid algorithm, the output of controller is used to increase the high crosswind amount of deslagging temperature, and equal amplitude reduces the low crosswind amount of deslagging temperature, enter a reasonable range until the left and right temperature difference of stove tail, air quantity is adjusted by left and right side air quantity actuator.
Usefulness of the present invention is: the left and right side temperature measuring instrument that is arranged on the stove tail can reflect left and right sides combustion balance situation in the fire grate, and on behalf of fuel, the side that temperature is high be not fully burned, and air-supply provides foundation in the stove in order to distribute automatically; By adjusting the left and right side air output, can realize the mode chain furnace combustion optimal control.
Description of drawings
Accompanying drawing 1 is on-the-spot measure and control instrument layout drawing.
Accompanying drawing 2 is a mode chain furnace combustion optimal control system block diagram.
The specific embodiment
The position of stove tail temperature measuring instrument and left and right sides air quantity actuator as shown in Figure 1, left and right side air quantity actuator is installed on the horizontal air supply duct in air compartment both sides as blast main road lateral, be used for controlling respectively the branch total blast volume that enters each side of air compartment, stove tail left and right side temperature measuring instrument is installed in the stove tail respectively, detects the temperature at fire grate center line two side deslagging positions respectively.
Mode chain furnace combustion optimal control system block diagram as shown in Figure 2.
△ TLR is the measured value of the difference of stove tail left and right side temperature as stove tail differential temperature controller, △ TLRSP is the setting value of controller, value is 0, stove tail differential temperature controller adopts pid algorithm, ratio P span 80～120, the time of integration I span, 400～500, differential D span 10～20; The dead band span is 1%～5% of a range, and pid algorithm output remains unchanged when deviation enters the dead band.
The output OPL of left side air quantity manual operator is as the input 1 of selector A, and the output SELA of selector A is as the input 2 of selector A; The output OPR of right side air quantity manual operator is as the input 1 of selector B, and the output SELB of selector B is as the input 2 of selector B.
RS is the switching value input variable of selector A and selector B, when left and right side air quantity manual operator all is that RS is ON when putting into operation state automatically, otherwise is OFF; When RS was ON, selector was output as the input 2 of selector, otherwise selector is output as the input 1 of selector.
The output SELA of selector A and stove tail differential temperature controller output sum are as the input of left side air quantity manual operator, and the output OPL of left side air quantity manual operator is connected to left side air quantity actuator; The difference of the output SELB of selector B and the output of stove tail differential temperature controller is as the input of right side air quantity manual operator, and the output OPL of right side air quantity manual operator is connected to right side air quantity actuator.
Claims (2)
1. a mode chain furnace combustion optimal control system is characterized in that: be provided with stove tail differential temperature controller, selector A, selector B, adder, subtracter, left side air quantity manual operator and actuator, three o'clock wind operator and actuator, stove tail left side temperature measuring instrument, stove tail right side temperature measuring instrument; Wherein left and right side air quantity actuator is installed on the horizontal air supply duct in air compartment both sides as blast main road lateral, be used for controlling respectively the branch total blast volume that enters each side of air compartment, stove tail left and right side temperature measuring instrument is installed in the stove tail respectively, detects the temperature at fire grate center line two side deslagging positions respectively; The difference of stove tail left and right side temperature is as the measured value of stove tail differential temperature controller, and stove tail differential temperature controller adopts pid algorithm.
2. a kind of mode chain furnace combustion optimal control according to claim 1 system, it is characterized in that: the output of stove tail differential temperature controller is used to increase the high crosswind amount of deslagging temperature, and equal amplitude reduces the low crosswind amount of deslagging temperature, enter a reasonable range until the left and right temperature difference of stove tail, air quantity is adjusted by left and right side air quantity actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310174629.3A CN103225820B (en) | 2013-05-13 | 2013-05-13 | Chain grate furnace combustion optimization control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310174629.3A CN103225820B (en) | 2013-05-13 | 2013-05-13 | Chain grate furnace combustion optimization control system |
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| Publication Number | Publication Date |
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| CN103225820A true CN103225820A (en) | 2013-07-31 |
| CN103225820B CN103225820B (en) | 2015-05-13 |
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| CN201310174629.3A Active CN103225820B (en) | 2013-05-13 | 2013-05-13 | Chain grate furnace combustion optimization control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512041B (en) * | 2013-10-23 | 2016-01-27 | 北京和隆优化科技股份有限公司 | A kind of chain boiler optimal combustion flame position computational methods |
| CN107448970A (en) * | 2017-08-14 | 2017-12-08 | 山东天力节能环保工程有限公司 | Boiler room |
| CN109458631A (en) * | 2018-11-15 | 2019-03-12 | 华电电力科学研究院有限公司 | A kind of adherent wind system preventing tangentially-fired boiler water wall high temperature corrosion and its working method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004044827A (en) * | 2002-07-09 | 2004-02-12 | Chugai Ro Co Ltd | Regenerative combustion apparatus and heating furnace |
| CN2711539Y (en) * | 2003-07-16 | 2005-07-20 | 北京和利时***工程股份有限公司 | Automatic combustion adjusting system for circulating fluidized bed boiler |
| CN101078525A (en) * | 2007-06-25 | 2007-11-28 | 周振华 | Automatic optimization control method of boiler air-supply volume |
| US20110045421A1 (en) * | 2008-03-06 | 2011-02-24 | Ihi Corporation | Method and apparatus of controlling oxygen supply for boiler |
| CN102226643A (en) * | 2011-03-28 | 2011-10-26 | 宁夏惠冶镁业集团有限公司 | Rotary kiln automatic control system and method |
-
2013
- 2013-05-13 CN CN201310174629.3A patent/CN103225820B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004044827A (en) * | 2002-07-09 | 2004-02-12 | Chugai Ro Co Ltd | Regenerative combustion apparatus and heating furnace |
| CN2711539Y (en) * | 2003-07-16 | 2005-07-20 | 北京和利时***工程股份有限公司 | Automatic combustion adjusting system for circulating fluidized bed boiler |
| CN101078525A (en) * | 2007-06-25 | 2007-11-28 | 周振华 | Automatic optimization control method of boiler air-supply volume |
| US20110045421A1 (en) * | 2008-03-06 | 2011-02-24 | Ihi Corporation | Method and apparatus of controlling oxygen supply for boiler |
| CN102226643A (en) * | 2011-03-28 | 2011-10-26 | 宁夏惠冶镁业集团有限公司 | Rotary kiln automatic control system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512041B (en) * | 2013-10-23 | 2016-01-27 | 北京和隆优化科技股份有限公司 | A kind of chain boiler optimal combustion flame position computational methods |
| CN107448970A (en) * | 2017-08-14 | 2017-12-08 | 山东天力节能环保工程有限公司 | Boiler room |
| CN109458631A (en) * | 2018-11-15 | 2019-03-12 | 华电电力科学研究院有限公司 | A kind of adherent wind system preventing tangentially-fired boiler water wall high temperature corrosion and its working method |
| CN109458631B (en) * | 2018-11-15 | 2024-02-27 | 华电电力科学研究院有限公司 | Wall-attached air system and method for preventing high-temperature corrosion of water-cooled wall of tetragonal tangential boiler |
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| CN103225820B (en) | 2015-05-13 |
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