CN101672482A - Optimized air distribution control system for industrial furnace - Google Patents
Optimized air distribution control system for industrial furnace Download PDFInfo
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- CN101672482A CN101672482A CN200910044541A CN200910044541A CN101672482A CN 101672482 A CN101672482 A CN 101672482A CN 200910044541 A CN200910044541 A CN 200910044541A CN 200910044541 A CN200910044541 A CN 200910044541A CN 101672482 A CN101672482 A CN 101672482A
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- speed regulator
- flue
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 230000001939 inductive effect Effects 0.000 claims description 25
- 239000000779 smoke Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000010010 raising Methods 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000005259 style development Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses an optimized air distribution control system for an industrial furnace, wherein a burner is connected with a fuel valve and an air valve, the air valve is connected with a hot air pipe, a flue is connected with an inlet of a heat exchanger, an outlet of the heat exchanger is connected with an induced draft fan set, and the induced draft fan set is driven by an induced draft speed regulator. A bypass valve is arranged between the cold air pipe and the hot air pipe, the cold air pipe is connected with an air outlet of a blower unit, and the blower unit is driven by an air blast speed regulator. The outlet of the sampling pipe is connected with a flue gas oxygen concentration analyzer, the signal output end of the flue gas oxygen concentration analyzer is connected with the first signal input end of a controller, the second signal output end of the controller is connected with the control signal input end of an induced air speed regulator, a furnace pressure guide pipe is connected with a pressure transmitter, the signal output end of the pressure transmitter is connected with the second signal input end of the controller, the first signal output end of the controller is connected with the control signal input end of an air blast speed regulator, and the communication port of the controller is connected with a human-computer interface. The rotating speeds of the induced air unit and the air blower unit driven by the speed regulator are controlled by detecting the pressure in the furnace and the oxygen concentration value of the flue gas on line, so that the furnace kiln is always in an optimized air distribution state.
Description
Technical field
The present invention relates to a kind of control system, relate in particular to a kind of optimization air-distribution control system that is used for heater for rolling steel, blast funnace hot blast stove, glass kiln, cement kiln, limekiln, furnace, chemical industry tube furnace, steam boiler and other industrial furnace.
Background technology
Industrial furnace is adopting solid fuel, liquid fuel or gaseous fuel are under the situation of burning quality difference, not only greatly waste energy, serious environment pollution again, how to solve the problem that this difficult problem has become present technique field, countries in the world to receive much concern and study, especially the extensive style development in China owing to economy, burning quality to fuel is not also fundamentally made enough understanding, though once carried out Control for Kiln Temperature, the Artificial Control of pulse-combustion control and air quantity, as application number was arranged before the present invention is the patent application of 200710034470.X " the industrial furnace burning quality is analyzed and control system ", improved the burning quality of industrial furnace fuel to a certain extent, greatly reduced the discharge capacity of nitrogen oxide or carbon monoxide, saved the energy, but this deals with problems from aspect of air blast just.
Summary of the invention
In order to solve the problem that prior art exists, the invention provides a kind of control system that can carry out the optimization air distribution to heating furnace, hot-blast stove, steam boiler, chemical industry tube furnace, mechanical heat-treatment furnace, glass kiln, cement kiln, limekiln, furnace and other industrial furnace.
For achieving the above object, the technical solution used in the present invention is: on the body of heater of the industrial furnace of making of metal material and refractory material the individual burner of N (integer of N 〉=1) is installed, the inner chamber of the spout connection body of heater of burner, the charging aperture of burner links to each other with fuel-supply pipe through fuel valve, one of the air intake end of burner and air valve links to each other, and the other end of air valve is communicated with warm-air pipe.The tail end of body of heater links to each other with the smoke inlet end of flue, and the outlet flue end of flue is communicated with the inlet of heat exchanger, and the outlet of heat exchanger is connected the air inducing unit through smoke outlet flue, and the air inducing unit is driven by the air inducing speed regulator.In the side of heat exchanger cool air hose and warm-air pipe are installed, cold wind was heated after cool air hose and warm-air pipe were connected in heat exchanger, between cool air hose and warm-air pipe, be equipped with by-passing valve, one of cool air hose is connected with the air opening end of blower unit, blower unit is driven by the air blast speed regulator, and air blast speed regulator and air inducing speed regulator are powered by three-phase alternating-current supply.Two of the sampling pipe of installing at flue sidewall is communicated with the inner chamber of flue and the input of flue gas oxygen concentration analyzer respectively, the signal output part of flue gas oxygen concentration analyzer is through first signal input part of communication cable connection controller, and the secondary signal output of controller links to each other with air inducing speed governor control signal input with communication cable.An inner chamber that stretches into body of heater of the furnace pressure conduit of installing at sidewall of the furnace body, the other end of furnace pressure conduit links to each other with the air inlet end of pressure transmitter, the signal output part of pressure transmitter links to each other through the secondary signal input of communication cable with controller, the PORT COM of controller links to each other with man-machine interface with connection, and first signal output part of controller is connected with the control signal input of communication cable with the air blast speed regulator.
Adopt a kind of optimized air-distribution control system for industrial furnace that as above technical scheme provides compared with prior art, technique effect is:
1. this control system has been installed furnace pressure conduit and sampling pipe, can on-line continuous detect the pressure variation of body of heater inner chamber and the oxygen concentration of body of heater inner chamber simultaneously, can regulate the rotating speed of blower unit and air inducing unit at any time through speed regulator, make the flue gas pressures and the oxygen content in the flue gas of body of heater inner chamber remain on the scope that sets, guaranteed the burning quality of body of heater inner chamber fuel and stablizing of furnace pressure;
2. can reduce air blast power consumption 30～60%;
3. can further reduce fuel consumption 2-5%;
4. the low oxygen combustion in the stove can further reduce the oxidization burning loss 5～10% of metalliferous material in the stove.
Description of drawings
Accompanying drawing is the schematic layout pattern of a kind of optimized air-distribution control system for industrial furnace of the present invention, also is Figure of abstract of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
The individual burner 11 of N (integer of N 〉=1) is installed on body of heater 1.The inner chamber of the spout connection body of heater 1 of burner 11, the charging aperture of burner 11 links to each other with fuel-supply pipe through fuel valve 10, one of the air intake end of burner 11 and air valve 9 links to each other, the other end of air valve 9 is communicated with warm-air pipe 7, fuel (solid fuel, liquid fuel or gaseous fuel) through fuel valve 10 go into burner 11 with from warm-air pipe 7 through the mixed combustion and improve the ignition temperature heating of burning in to body of heater 1 in burner 11 of the hot-air of air valve 9.The tail end of body of heater 1 links to each other with the smoke inlet end of flue 2, and the outlet flue end of flue 2 is communicated with the inlet of heat exchanger 3, and the outlet of heat exchanger 3 is connected air inducing unit 5 through smoke outlet flue 2A.The flue gas of discharging from flue 2 in the body of heater 1 is discharged by air inducing unit 5 through smoke outlet flue 2A through heat exchanger 3, and described air inducing unit 5 is driven by air inducing speed regulator 19.Cool air hose 6 and warm-air pipe 7 are installed in the side of heat exchanger 3, and cold wind was heated after cool air hose 6 and warm-air pipe 7 were connected in heat exchanger 3.By-passing valve 8 is assemblied between cool air hose 6 and the warm-air pipe 7, and it can make cool air hose 6, warm-air pipe 7 both paths or closed circuit.Air opening end with blower unit 4 of cool air hose 6 is connected, and blower unit 4 is driven by air blast speed regulator 15, and air blast speed regulator 15 and air inducing speed regulator 19 are by three-phase alternating-current supply 20 power supplies.The inner chamber of a connection flue 2 of the sampling pipe of installing at the sidewall of flue 2 12, the other end of sampling pipe 12 links to each other with the input of flue gas oxygen concentration analyzer 13, the signal output part of flue gas oxygen concentration analyzer 13 is through first signal input part of communication cable connection controller 14, and the secondary signal output of controller 14 links to each other with the control signal input of air inducing speed regulator 19 with communication cable.An inner chamber that stretches into body of heater 1 of the furnace pressure conduit of installing at the sidewall of body of heater 1 17, the other end of furnace pressure conduit 17 links to each other with the air inlet end of pressure transmitter 18, the signal output part of pressure transmitter 18 links to each other through the secondary signal input of communication cable with controller 14, and described pressure transmitter 18 can become the signal of telecommunication with the furnace pressure signal transition.The PORT COM of controller 14 connects man-machine interface 16 with connection, and first signal output part of controller 14 is connected with the control signal input of communication cable with air blast speed regulator 15.Described flue gas oxygen concentration analyzer is a prior art, and product can be bought in market, and it has paramagnetic formula, electric chemical formula, fuel cell formula, as: north divides oxygen analysers such as wheat Haake QZS-5101C type, the Shanghai Ying Sheng ZO-800 of instrument company series, EN-500 series all can.Can form by the industrial computer system of programmable controller PLC, Distributed Control System DCS, SCM system, intelligent instrument system or band I/O integrated circuit board by the control section that controller 14, man-machine interface 16 are formed, and wherein man-machine interface 16 can be made up of text display, touch-screen, touch panel computer or industry control host computer.The frequency converter that air blast speed regulator 15 and air inducing speed regulator 19 can select for use Siemens to provide also can adopt inner feedback speed-regulating device that the large people's science and technology in Beijing provides etc., and they are prior art.
During enforcement, close by-passing valve 8 earlier, start blower unit 4 and air inducing unit 5.Originally the outside air that enters heat exchanger 3 by blower unit 4, cool air hose 6 is a normal temperature, so the wind-warm syndrome of coming out from heat exchanger 3 is not high, normal temperature air enters burner 11 through warm-air pipe 7 and air valve 9 and enters in the body of heater 1 in burner 11 internal combustion with the fuel mix of coming from fuel valve 10.Along with the raising of the flue-gas temperature of discharging from flue 2, the wind-warm syndrome of the heat exchanger 3 of flowing through also can rise, and the atmosphere in the body of heater 1 also can change, and rises as pressure.When the furnace pressure in body of heater 1 rose, furnace pressure conduit 17 was passed to pressure transmitter 18 with the pressure changing of body of heater 1, and pressure transmitter 18 becomes the signal of telecommunication to pass to the secondary signal input of controller 14 through communication cable the furnace pressure signal transition.When the pressure in the detected body of heater 1 of the pressure sensor in the pressure transmitter 18 during (this moment body of heater 1 in furnace pressure rising) greater than the setting value of controller 14, the secondary signal output output control signal of controller 14 is given air inducing speed regulator 19, order about 5 speed-raisings of air inducing unit, the exhaust gas volumn of discharge is increased, reduced the furnace pressure in the body of heater 1; And when the pressure in the detected body of heater 1 of the pressure sensor of pressure transmitter 18 during less than the setting value of controller 14 (this moment body of heater 1 in furnace pressure reduction), the secondary signal output output control signal of controller 14 is given air inducing speed regulator 19, make the rotating speed of air inducing unit 5 reduce (being reduction of speed), the exhaust gas volumn that air inducing unit 5 is discharged reduces, promote the furnace pressure in the body of heater 1, air inducing unit 5 rotating speeds are in the state of a balance furnace pressure all the time like this, make the pressure (being furnace pressure) of body of heater 1 inner chamber be in a stable state stable or that work changes among a small circle in setting range all the time, thereby escaping in a large number of furnace gas and entering in a large number in the stove of the outer cold air of stove have been prevented, reach minimizing heat energy and run off the effect of stablizing furnace temperature.
Except furnace pressure conduit 17 collected the furnace pressure variable condition, sampling pipe 12 can collect the oxygen content of (from flue 2) flue gas in the body of heater 1.Sampling pipe 12 can be sent oxygen content situation in the flue gas that collects into oxygen content of smoke gas analyzer 13 and analyze, and becomes the signal of telecommunication to pass to controller 14 through the communication cable and first signal input part oxygen content signal transition.When analysis draws oxygen content value in the flue gas and is higher than the setting value of controller 14, be that air distribution is excessive, first signal output part of controller 14 is passed to air blast speed regulator 15 with signal, and the rotating speed of blower unit 4 is reduced, air quantity reduces, and has promptly reduced the oxygen content in the body of heater 1; If when the oxygen content value in the flue gas that 13 analyses of oxygen content of smoke gas analyzer obtain is lower than the setting value of controller 14, it is the air distribution deficiency, first signal output part of controller 14 is passed to air blast speed regulator 15 with signal this moment, improve the rotating speed of blower unit 4, both increased air quantity, increase the oxygen content in the body of heater 1, the oxygen content (being oxygen concentration) in the body of heater 1 is in a controlled plateau all the time like this, promptly optimizes state.
Claims (1)
1, a kind of optimized air-distribution control system for industrial furnace, quantity is installed more than or equal to 1 burner (11) on body of heater (1), the inner chamber of the spout connection body of heater (1) of burner (11), the charging aperture of burner (11) links to each other with fuel-supply pipe through fuel valve (10), one of the air intake end of burner (11) and air valve (9) links to each other, the other end of air valve (9) is communicated with warm-air pipe (7), the smoke inlet end of the same flue of tail end (2) of body of heater (1) links to each other, the outlet flue end of flue (2) is communicated with the inlet of heat exchanger (3), cool air hose (6) and warm-air pipe (7) are installed in the side of heat exchanger (3), by-passing valve (8) is assemblied between cool air hose (6) and the warm-air pipe (7), air opening end with blower unit (4) of cool air hose (6) links to each other, it is characterized in that: the outlet of heat exchanger (3) is connected air inducing unit (5) through smoke outlet flue (2A), air inducing unit (5) is driven by air inducing speed regulator (19), blower unit (4) is driven by air blast speed regulator (15), and air blast speed regulator (15) and air inducing speed regulator (19) are powered by three-phase alternating-current supply (20); The inner chamber of a connection flue (2) of the sampling pipe of installing at the sidewall of flue (2) (12), the other end of sampling pipe (12) links to each other with the input of flue gas oxygen concentration analyzer (13), the signal output part of flue gas oxygen concentration analyzer (13) connects first signal input part of controller (14) through communication cable, and the secondary signal output of controller (14) links to each other with the control signal input of air inducing speed regulator (19) with communication cable; An inner chamber that stretches into body of heater (1) of the furnace pressure conduit of installing at the sidewall of body of heater (1) (17), the air inlet end of the same pressure transmitter in other end (18) of furnace pressure conduit (17) links to each other, the signal output part of pressure transmitter (18) links to each other through the secondary signal input of the same controller of communication cable (14), the PORT COM of controller (14) connects man-machine interface (16) with connection, and first signal output part of controller (14) is connected with the control signal input of communication cable with air blast speed regulator (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044541A CN101672482A (en) | 2009-10-13 | 2009-10-13 | Optimized air distribution control system for industrial furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910044541A CN101672482A (en) | 2009-10-13 | 2009-10-13 | Optimized air distribution control system for industrial furnace |
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| CN101672482A true CN101672482A (en) | 2010-03-17 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900359A (en) * | 2010-09-05 | 2010-12-01 | 无锡市盛力达机械工程有限公司 | Automatic pressure control device for gas furnace pressure |
| CN102913944A (en) * | 2012-10-30 | 2013-02-06 | 新疆杰瑞节能环保设备有限公司 | Air induction control system |
| CN103090410A (en) * | 2013-02-01 | 2013-05-08 | 莱芜钢铁集团电子有限公司 | Combustion air pressure control method, device and system for heating furnace |
| CN103234347A (en) * | 2013-05-13 | 2013-08-07 | 北京和隆优化科技股份有限公司 | Method for optimizing and controlling rotary kiln air volume |
| CN103666571A (en) * | 2013-11-26 | 2014-03-26 | 潘高峰 | Gas producer |
| CN103782101A (en) * | 2011-10-13 | 2014-05-07 | 三浦工业株式会社 | Heat medium boiler |
| CN104805247A (en) * | 2015-05-18 | 2015-07-29 | 上海联达节能科技有限公司 | Energy-saving regulating and controlling method for combustion fan of blast furnace hot blast stove |
| CN105233644A (en) * | 2015-10-20 | 2016-01-13 | 济南环保陶瓷除尘技术研究所 | Coal-fired flue gas dust-removing desulfurization and denitrification integrated compound technology system |
| CN107906557A (en) * | 2017-11-08 | 2018-04-13 | 西安西热锅炉环保工程有限公司 | The hot air quantity on-line measurement of burner Secondary Air and Optimal Control System and method |
-
2009
- 2009-10-13 CN CN200910044541A patent/CN101672482A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900359B (en) * | 2010-09-05 | 2012-02-15 | 无锡市盛力达机械工程有限公司 | Automatic pressure control device for gas furnace pressure |
| CN101900359A (en) * | 2010-09-05 | 2010-12-01 | 无锡市盛力达机械工程有限公司 | Automatic pressure control device for gas furnace pressure |
| CN103782101A (en) * | 2011-10-13 | 2014-05-07 | 三浦工业株式会社 | Heat medium boiler |
| CN103782101B (en) * | 2011-10-13 | 2016-03-23 | 三浦工业株式会社 | Thermophore boiler |
| CN102913944A (en) * | 2012-10-30 | 2013-02-06 | 新疆杰瑞节能环保设备有限公司 | Air induction control system |
| CN103090410A (en) * | 2013-02-01 | 2013-05-08 | 莱芜钢铁集团电子有限公司 | Combustion air pressure control method, device and system for heating furnace |
| CN103090410B (en) * | 2013-02-01 | 2015-07-08 | 莱芜钢铁集团电子有限公司 | Combustion air pressure control method, device and system for heating furnace |
| CN103234347A (en) * | 2013-05-13 | 2013-08-07 | 北京和隆优化科技股份有限公司 | Method for optimizing and controlling rotary kiln air volume |
| CN103666571A (en) * | 2013-11-26 | 2014-03-26 | 潘高峰 | Gas producer |
| CN104805247A (en) * | 2015-05-18 | 2015-07-29 | 上海联达节能科技有限公司 | Energy-saving regulating and controlling method for combustion fan of blast furnace hot blast stove |
| CN105233644A (en) * | 2015-10-20 | 2016-01-13 | 济南环保陶瓷除尘技术研究所 | Coal-fired flue gas dust-removing desulfurization and denitrification integrated compound technology system |
| CN105233644B (en) * | 2015-10-20 | 2017-05-03 | 济南环保陶瓷除尘技术研究所 | Coal-fired flue gas dust-removing desulfurization and denitrification integrated compound technology system |
| CN107906557A (en) * | 2017-11-08 | 2018-04-13 | 西安西热锅炉环保工程有限公司 | The hot air quantity on-line measurement of burner Secondary Air and Optimal Control System and method |
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Open date: 20100317 |