CN104141964A - Air supply system and method of industrial furnace - Google Patents
Air supply system and method of industrial furnace Download PDFInfo
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- CN104141964A CN104141964A CN201410163159.5A CN201410163159A CN104141964A CN 104141964 A CN104141964 A CN 104141964A CN 201410163159 A CN201410163159 A CN 201410163159A CN 104141964 A CN104141964 A CN 104141964A
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Abstract
The invention provides an air supply method of an industrial furnace. When air pressure is required to be increased, opening degrees of air doors of frequency conversion fans are increased; when the air pressure is required to be further increased, opening degrees of air doors of constant-speed fans are increased; when the air pressure is still required to be increased, working frequency of each frequency conversion fan is increased; when the air pressure is required to be decreased, the working frequency of each frequency conversion fan is decreased; when the air pressure is required to be further decreased, the opening degrees of the air doors of the frequency conversion fans are decreased; and when the air pressure is still required to be decreased, the opening degrees of the air doors of the constant-speed fans are decreased. The air supply method of the industrial furnace has the advantages as follows: for the fan units operating in an air door adjustment mode, only part of fans are subjected to frequency conversion renovation; and on the basis that the air pressure is stably adjusted through frequency conversion, the part of fans and other fans are controlled coordinately and combined to the overall fan unit network for stable operation.
Description
Technical field
The present invention relates to a kind of industrial furnace supply air system and method thereof, in industrial furnace combustion process, keep the combustion-supporting hot-blast pressure of industrial furnace steady.
Background technology
At present, the blast automatic adjustment technology of domestic industry stove blower fan unit is substantially all by regulating each fans entrance throttle opening to realize, and by change blade angle within the scope of 90 degree, controls house steward's output pressure parameter.This Scheme Characteristics is that cost of investment is lower, but damper is adjusted in when accomplishing throttling and has increased pipe resistance, and motor need to consume additional electrical energy for overcoming the pipe resistance of increase, causes that energy consumption increases.
Along with the development of motor frequency conversion technology, the adjusting of more domestic monomer blower fans starts to adopt variable frequency adjustment technology, and frequency control all has high speed efficiency in the wide range of speeds, so be a kind of more satisfactory mode of speed regulation.Abroad, as the flourishing industrial country such as German, Japanese, aspect the adjusting of Pumps & Fans, generally applying frequency control.The Pumps & Fans of domestic high parameter, large capacity power station unit also often adopts speed change regulative mode, to improve the performance driving economy of unit.Frequency conversion scheme has many advantages: energy saving in running, start steadily, response fast, but its cost of investment is higher, same Fans, the investment that adopts frequency conversion scheme may be 15～20 times of air door regulation scheme.General large production equipment, is all many Fans paired running at ordinary times, if all adopt frequency conversion drive blower fan, invests too large.
Therefore, early stage blower fan unit, because converter technique is also immature, all adopts air door regulation technology to control blast, and present project begun newly, if unit number of units is more, is limited to investment excessive, still can preferentially adopt air door regulation technology.
Summary of the invention
Object of the present invention aims to provide a kind of industrial furnace air supply method, to overcome the defect that exists of above-mentioned prior art.
The invention provides a kind of industrial furnace air supply method, when needs increase blast, the aperture of the air door of frequency conversion fan increases; When the air door of frequency conversion fan is in maximum opening, while also needing to increase blast, the aperture of the air door of constant speed blower fan increases; When the air door of constant speed blower fan is also in maximum opening, while still needing to increase blast, frequency conversion fan increases operating frequency; When needs reduce blast, frequency conversion fan reduces operating frequency; When frequency conversion fan is in minimum frequency of operation, while also needing to reduce blast, the aperture of the air door of frequency conversion fan reduces; When the air door of frequency conversion fan is in minimum aperture, while also needing to reduce blast, the aperture of the air door of constant speed blower fan reduces.
Further, the invention provides a kind of industrial furnace air supply method, can also there is such feature: when the operating frequency of frequency conversion fan is in maximum, in the time of need to increasing blast, start any one fan operation.
Further, the invention provides a kind of industrial furnace supply air system, can also there is such feature: when the air door of constant speed blower fan in minimum aperture, in the time of need to reducing blast, close any one blower fan.
Further, the invention provides a kind of industrial furnace air supply method, can also there is such feature: while closing blower fan, close constant speed blower fan.
Further, the invention provides a kind of industrial furnace air supply method, can also there is such feature: when industrial furnace supply air system starts, start frequency conversion fan.
In addition, the invention provides a kind of industrial furnace supply air system, comprising: air supply duct, several frequency conversion fans that are connected, is connected several constant speed blower fan and controllers with air supply duct with air supply duct; When needs increase blast, the aperture that controller is first controlled the air door of frequency conversion fan increases; When the air door of frequency conversion fan is in maximum opening, while also needing to increase blast, the aperture that controller is controlled the air door of constant speed blower fan increases; When the air door of constant speed blower fan is also in maximum opening, while still needing to increase blast, controller is controlled frequency conversion fan increases operating frequency; When needs reduce blast, controller is controlled frequency conversion fan and is reduced operating frequency; When frequency conversion fan is in minimum frequency of operation, while also needing to reduce blast, the aperture that controller is controlled the air door of frequency conversion fan reduces; When the air door of frequency conversion fan is in minimum aperture, while also needing to reduce blast, the aperture that controller is controlled the air door of constant speed blower fan reduces.
Further, the invention provides a kind of industrial furnace supply air system, can also there is such feature: when the operating frequency of frequency conversion fan is in maximum, in the time of need to increasing blast, controller starts any one fan operation.
Further, the invention provides a kind of industrial furnace supply air system, can also there is such feature: when the air door of constant speed blower fan in minimum aperture, in the time of need to reducing blast, controller cuts out any one blower fan.
Further, the invention provides a kind of industrial furnace supply air system, can also there is such feature: while closing blower fan, controller cuts out constant speed blower fan.
Further, the invention provides a kind of industrial furnace supply air system, can also there is such feature: when industrial furnace supply air system starts, controller starts frequency conversion fan.
The beneficial effect of the invention
The invention provides a kind of industrial furnace supply air system and method, the blower fan unit for adopting the operation of air door regulative mode, only carries out Frequency Conversion Modification to part blower fan.Realizing on the basis of frequency conversion stable regulation blast, then coordinating to control with other blower fan, be incorporated to the stable operation of whole blower fan unit pipe network.By Intelligent closed-loop bivariate, regulate, the blast control that air door is regulated is controlled and is coordinated to control with the blast of variable frequency adjustment, reaches and invests object low, good energy-conserving effect.
The invention provides a kind of industrial furnace supply air system and method, utilize PLC system to control blower fan unit entrance throttle opening and motor frequency conversion frequency coordination, minimize pipeline windage, reduced energy loss, making it to reach can steady wind pressure, meet and produce, and can realize the object that power consumption runs minimized again.Control accuracy of the present invention is high, and energy-saving effect is obvious, effectively reduces equipment investment.
The invention provides a kind of industrial furnace supply air system and method industrial furnace blower fan unit blast control accuracy and energy-conservation aspect effect remarkable, the specific performance index of result of the test is as follows:
A. system operating ratio >=99.95%
B. electric power consumption per ton steel declines >=15% relatively
C. system mean free error time (MTBF) >=8760h
Accompanying drawing explanation
Fig. 1 is the structural representation of industrial furnace supply air system of the present invention.
Fig. 2 is the adjusting control flow chart of industrial furnace supply air system of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Fig. 1 is the structural representation of industrial furnace supply air system of the present invention.
As shown in Figure 1, industrial furnace supply air system comprises: constant speed blower fan 21, frequency conversion fan 22, total pipeline 4, lateral 3, subscriber equipment 5, check baffle plate 6, wind pressure sensor, controller and control panel.Subscriber equipment is the equipment that hot-blast stove or blast furnace etc. need blower fan air-supply.
Constant speed blower fan 21 has constant speed air door of fan 21-1, and frequency conversion fan 22 has frequency conversion fan air door 22-2.
Actual blast in wind pressure sensor test total pipeline.The blast steady state value of the actual blast that controller is tested wind pressure sensor and setting compares, and according to comparative result, controls blower fan running.
Tradition regulative mode is mainly to regulate entrance airdoor control blast, and all blower fans are constant speed blower fan.Inconsistent for preventing each arm voltage supply, cause gas backstreaming or the action of check baffle plate, 6 Fans throttle openings need be unified to regulate, and throttle opening adjustable range is 0 °～90 °.When throttle opening is 0 °, house steward's blast is zero; When throttle opening is 90 °, house steward's blast is fan design maximum pressure (for example 10Kpa).For example, if certain value (7Kpa) in the middle of total pipe pressure need remain on, just needs corresponding damper aperture 0 ° to 90 ° a certain angle.When customer flow changes, total pipe pressure can fluctuate thereupon, and when customer flow increases, total pipe pressure can reduce, and need to increase throttle opening and supplement air quantity; When customer flow reduces, total pipe pressure can increase, and need to reduce throttle opening and reduce air quantity.
Industrial furnace supply air system provided by the invention, changes 2# wherein, 4# blower fan into frequency conversion fan by constant speed blower fan, when needs are controlled total pipe pressure and remained on steady state value, can adopt and change entrance air door simultaneously, and change two kinds of methods of frequency conversion fan running frequency.For preventing that each arm from occurring that air pours in down a chimney or the action of check baffle plate, on the other hand for keeping Fan Energy-saving operation, should guarantee that throttle opening is as far as possible large on the one hand, frequency conversion frequency reduces.Air door regulates and the coordination control of frequency conversion frequency is crucial.
When operating in the situation of 1～2 Fans, controller preferentially starts frequency conversion fan.When only having frequency conversion fan 22 operation, controller can comprehensive adjustment frequency conversion fan air door 22-1, frequency conversion fan 22 running frequencies, when blast regulates from low to high, keep frequency conversion fan 22 running frequencies at minimum, frequency conversion fan air door 22-2 regulation blast operation with closed ring, needs because blast increases, will certainly increase frequency conversion fan air door 22-2 aperture gradually.When blast is stabilized in setting value, remain on air door closed-loop adjustment state; When frequency conversion fan air door 22-2 regulation arrives saturation state, and while still needing to increase blast, heighten gradually frequency conversion fan 22 running frequencies.When blast is stabilized in setting value, remain on frequency closed-loop adjustment state.When frequency adjustment arrives saturation state, append and start other blower fan.
When blast regulates from high to low, by aforementioned process reverse order, carry out; preferentially turn down frequency conversion fan 22 running frequencies, when frequency adjustment arrives minimum operation frequency, reduce frequency conversion fan air door 22-2 aperture.When the aperture of frequency conversion fan 22 hour, while still needing to reduce blast, controller stops a frequency conversion fan 22.
When if frequency conversion fan 22 starts as main air blower, when the blast moving according to the mode that only has frequency conversion fan 22 work cannot reach blast setting value, should append a constant speed blower fan 21, now, frequency conversion fan and constant speed blower fan move simultaneously.
When frequency conversion fan and constant speed blower fan move simultaneously, need the running frequency of comprehensive adjustment frequency conversion fan air door 22-2, constant speed air door of fan 21-1, frequency conversion fan 22.When blast regulates from low to high, need to keep frequency conversion fan 22 running frequencies in minimum, constant speed air door of fan 21-1 aperture in minimum of a value, first carry out frequency conversion fan air door 22-2 closed-loop adjustment state.Along with blast increases, enter constant speed blower fan 21-1 throttle opening adjustment state.After the adjusting of constant speed blower fan 21-1 air door is saturated, then enter frequency conversion fan 22 running frequency adjustment state.
When blast regulates from high to low, by aforementioned process reverse order, carry out.The order of this adjusting is that the running frequency that lowers frequency conversion fan 22-turn down frequency conversion fan air door 22-2-turns constant speed air door of fan 21-1-down and stops a Fans.Controller preferentially cuts out constant speed blower fan 21.
In particular cases, as frequency conversion fan breaks down, there will be only constant speed blower fan 21 operations.When only having constant speed fan operation, still adopt the traditional approach that regulates total pipe pressure according to air door.
Entrance damper aperture and blower fan frequency coordination are controlled operation principle:
When whole system only needs to move 1～2 Fans, preferentially move frequency conversion fan, blast is stabilized in setting value by as above variable frequency adjustment mode.When system need to be appended 1～2 constant speed motor, air quantity, blast must be not enough, frequency conversion fan is pressed closed-loop control as above, must be operated in peak frequency 50Hz state, even if now start immediately constant speed motor, also can not occur that air pours in down a chimney, during actual input constant speed motor wind path, first when air door complete shut-down, start constant speed, then air door is opened gradually from full-shut position.When ductwork pressure returns to setting pressure, air door stops opening.When air quantity is superfluous, blast is when bigger than normal, preferentially stops constant speed motor.While stopping constant speed motor, air quantity must be superfluous, frequency conversion fan is by closed-loop control as above, must be operated in lowest operating frequency (the definition frequency conversion frequency of washing non-return check valve open is lowest operating frequency, and now pressure that frequency conversion fan supplies is greater than total pipe pressure), close before constant speed motor, reduce gradually air door, after air door is closed, constant speed blower fan is out of service, in closing the process of air door, frequency conversion fan reduces to compensate to air door by improving operating frequency.
Fig. 2 is the adjusting control flow chart of industrial furnace supply air system of the present invention.
As shown in Figure 2, frequency conversion and air door regulate and all can exert an influence to ductwork pressure, so this control system is divariant system.To divariant system, need carry out decoupling zero control, decoupling zero control problem represents to select suitable control law a multi-variable system to be turned to the control problem of a plurality of independently single-variable systems.After realizing decoupling zero, a multi-input multi-output control system has just been removed the cross-couplings between input, output variable, thereby realizes autonomous control, the control being independent of each other.
When constant speed, frequency conversion fan put into operation simultaneously:
For reducing power attenuation, it is maximum that constant speed, frequency conversion fan air door all preferentially keep, by regulating frequency conversion FREQUENCY CONTROL house steward blast.When frequency is reduced to fmin, if system wind pressure is still bigger than normal, by regulating constant speed throttle opening to control blast.If frequency reach fmin,, constant speed air door of fan aperture hour, if house steward's blast is still bigger than normal, then by regulating frequency conversion air door control system blast.When frequency reaches rmin, constant speed, frequency conversion throttle opening all reach hour, if house steward's blast is still bigger than normal, system request stops 1 Fans.When constant speed, frequency conversion air door all keep maximum, and frequency conversion frequency reached fmax, if when house steward's blast is still less than normal, system request is appended 1 Fans.
The Baosteel hot rolling 1580 heating furnace combustion fans of take are subjects, with industrial furnace supply air system provided by the invention and method, carry out reforming test.Concrete condition is as follows:
Baogang Stocks Trading Co.'s 1580 hot rollings have three walking beam furnaces at present, and due to production capacity reason, in most of situation, general two stoves are produced.Every heating furnace is all provided with two combustion fans when design provides combustion air.In actual motion, from Energy Angle, when two heating furnaces come into operation, conventionally only open 2～3 combustion fans, under rare occasion, also have operation 1 or 4 s' situation.These combustion fans, by regulating its import baffle opening, when guaranteeing heating furnace entrance combustion air pressure at 7kpa, meet heating furnace and normally move the demand to air quantity.At present, fans entrance throttle opening changes between being limited at 30%～72%, when aperture is lower than 30% time, reduces by a Fans operation, when aperture is greater than 72%, increases by a Fans operation.Take fan as constant speed blower fan.
1580 hot-rolling heating furnace combustion fans have 6, and the nominal parameter of these blower fans is as follows:
| Metered flow | 84400m3/h |
| Specified total head | 13000pa |
| Rated voltage | 6000V |
| Rated current | 47～49A |
| Rated power | 400～410kW |
| Rated speed | 1480rpm |
Before transformation, 1580 hot-rolling heating furnace combustion fans adopt entrance air door regulative mode, in the situation that meeting production requirement, also have two problems simultaneously:
1, baffle plate is adjusted in when accomplishing throttling has increased pipe resistance, and motor need to consume additional electrical energy for overcoming the pipe resistance of increase, causes that energy consumption increases;
2, the efficiency of controllable register aperture is lower, and the governing response that blast is changed is slow;
After transformation:
The 2# of six Fans, 4# blower fan carry out Frequency Conversion Modification, have greatly reduced air door and have regulated the restriction loss causing, and can make Pumps & Fans keep higher operational efficiency within the scope of very large variable working condition, greatly reduce the energy consumption of combustion fan.
When operating in the situation of 1～2 Fans, preferentially start frequency conversion fan, keep frequency conversion fan air door maximum opening, by variable frequency adjustment, control ductwork pressure, at this moment constant speed motor is in halted state, air door complete shut-down.When blast is not enough, in the time that air quantity need to being appended, then append in addition 1～2 constant speed blower fan.Start blower fan, general first starter motor, Time Delay Opening air door then, along with air door is opened gradually by complete shut-down, blast recovers gradually, and when pipe network blast meets process requirements, air door remains on this position.When air quantity demand reduces, when blast is on the rise, preferentially stop the blower fan of constant-speed operation.Stop constant speed blower fan, first slowly close air door, when air door full cut-off, close constant speed blower fan.In closing the process of air door, air output reduces gradually, blast reduces gradually, at this moment frequency conversion fan is by monitoring ductwork pressure, constantly supplement the wind loss that constant speed motor stops causing, because frequency conversion fan speed regulates greatly, faster than air door, regulate, can supplement rapidly air quantity, make whole system be stabilized in new equalization point.
Transform postindustrial stove supply air system and have following several duty:
One, only there is constant speed fanman to make state
When constant speed fan operation, the entrance throttle opening of blower fan goes to chase after constant speed air door PID controller output valve with very little amplitude rising under manual mode, when throttle opening catch up with constant speed air door PID output valve, the control mode of air door becomes automated manner from manual switchover, and the aperture of fans entrance control valve is controlled by pressure controller PID.When blower fan is controlled automatically, have 2 apertures spacing, one is that to append 72%, one of aperture be stop opening 30%, and both values can be set in control panel.When the aperture of fans entrance control valve surpasses, append aperture 72% and delay time arrives, control the blower fan that is selected as appending is started.Equally, when appending blower fan and just brought into operation, the entrance control valve of blower fan under manual mode with very little amplitude rising, rise to while equating with the entrance control valve opening of main air blower always, the control model of appending fans entrance control valve becomes automatically from manual switchover, then pressure P ID regulating main air machine and the aperture of appending the entrance control valve of blower fan.The later startup of appending blower fan is also same.When the entrance control valve opening of the blower fan moving is little, arrive with stop opening 30% and delay time, the button that stops on control panel confirming, by there being red background flicker, has audible alarm, alert simultaneously.Now, operating personnel select a certain to append blower fan for stopping machine.Afterwards, press and stop ACK button, the pattern of fans entrance control valve will switch to aperture and will decline according to a fixed speed, and when aperture drops to 0.1%, blower fan stops automatically.
Two, only there is frequency conversion fan duty
When selecting 2# frequency conversion fan to move as main air blower, meanwhile, select 4# blower fan for appending blower fan.Can click " startup " button on control panel, start main air blower, after fan operation, the color of control panel fan icon becomes redness from green.Blower fan frequency first increases when increasing to 35Hz, and then its corresponding air door is opened with per second 0.2 speed, and when throttle opening catch up with the PID regulation output of frequency conversion air door, air door switches to automated manner by manual mode.The output of the frequency conversion air door PID controller that the aperture of air door is followed regulates.When throttle opening is to 100% time, if when the actual value of pressure controller surpasses setting value, the PID that starts to carry out frequency conversion frequency regulates.The frequency of blower fan starts to increase from 35Hz, when increasing to appending when frequency is 48Hz, points out and appends blower fan, and frequency maximum is 50Hz.Time delay a period of time, is chosen as the 4# blower fan that appends blower fan and automatically starts, and the aperture of 4# air door now chases after the output valve of 2# frequency conversion fan in manual mode, catch up with rear switching automated manner; Then 4# frequency conversion fan frequency chases after the frequency of 2# frequency conversion fan, catch up with the adjusting of rear following frequency PID controller.When frequency conversion throttle opening is less than stop opening (can set on control panel) 30% time, the button that stops on control panel confirming, by there being red background flicker, has audible alarm, alert simultaneously.Now, operating personnel select a certain to append blower fan for stopping machine, afterwards, press and stop ACK button, the pattern of fans entrance control valve will switch to manually and with a fixed speed and decline, when aperture drops to 0.1%, start frequency reducing rate, when frequency drops to 34Hz, blower fan stops automatically.4# frequency conversion fan is as main air blower, and 2# frequency conversion fan is as appending blower fan in like manner.
Three, existing constant speed blower fan has again frequency conversion fan duty
When if frequency conversion fan starts as main air blower, according to only there being the mode of frequency conversion fan work to move.When appending a constant speed blower fan (mode of appending is as only there being constant speed duty), the air door manual unlocking of constant speed blower fan chases after the output valve of constant speed PID controller, frequency is being fallen simultaneously, after throttle opening catch up with constant speed PID output, frequency conversion air door PID regulates, constant speed air door PID regulates, frequency conversion frequency PID regulate between three relation switch in the following manner:
When the actual blast < measuring sets blast, first carrying out frequency conversion air door PID regulates, when the aperture of frequency conversion air door is greater than 100%, carrying out constant speed air door PID regulates, when constant speed throttle opening is greater than 100%, carrying out frequency conversion frequency PID regulates, when reaching, append frequency (can set) while being 48Hz on control panel, the button that appends confirmation on control panel will have red background flicker, there is audible alarm simultaneously, alert is appended blower fan, frequency conversion peak frequency 50Hz.
When the actual blast > measuring determines blast, first carrying out the frequent rate PID of modulation regulates, when frequency conversion frequency is less than 48Hz, carrying out constant speed air door PID regulates, when constant speed throttle opening is less than 35%, carrying out frequency conversion air door PID regulates, when frequency conversion throttle opening is less than frequency conversion air door stop opening (can set on control panel) 75%, the button that stops confirming will have red background flicker, there is audible alarm simultaneously, alert stops a Fans, the minimum aperture 70% of frequency conversion air door.
When having many constant speed blower fans and frequency conversion fan, there is same control mode.
Industrial furnace supply air system is centered by Fan Regulation PLC, take frequency converter, throttle opening as carrying out object, take HMI system as process monitoring, and the exchanges data maincenter using Fan Regulation PLC as whole system, is bearing data communication, data execution and instruction transformation and distribution between each system.
Blower fan control system (PLC) is realized long-range start and stop, the closed loop of constant speed/frequency conversion fan, air door and is coordinated to control.Finishing equipment monitoring HMI system intuitively reflects running, and display device state, records ductwork pressure, data on flows, completes the functions such as adjusting setting parameter and alarm logging, operation note, network diagnosis.Air-blower control PLC, with high voltage frequency converter, HMI between adopt Profibus to communicate by letter with EPA, speed, reliability and security that data among systems is processed have been improved, meanwhile, for expansion and the transformation of system later provides the advanced network architecture.
Industrial furnace supply air system is that result of the test shows: system run all right, energy-saving effect is obvious, and has increased ductwork pressure control accuracy, has reduced electric power consumption per ton steel.This regulating system, by the application of Baosteel heating furnace, has been grasped Fan Energy-saving structural control technology, has started a kind of new blower fan unit operation pattern, and cost of investment effectively reduces, and blower fan unit amount of energy saving and blast control accuracy high.
Claims (10)
1. an industrial furnace air supply method, is characterized in that:
When needs increase blast, the aperture of the air door of frequency conversion fan increases; When the air door of described frequency conversion fan is in maximum opening, while also needing to increase blast, the aperture of the air door of constant speed blower fan increases; When the air door of described constant speed blower fan is also in maximum opening, while still needing to increase blast, described frequency conversion fan increases operating frequency;
When needs reduce blast, described frequency conversion fan reduces operating frequency; When described frequency conversion fan is in minimum frequency of operation, while also needing to reduce blast, the aperture of the air door of described frequency conversion fan reduces; When the air door of described frequency conversion fan is in minimum aperture, while also needing to reduce blast, the aperture of the air door of described constant speed blower fan reduces.
2. industrial furnace air supply method according to claim 1, is characterized in that:
When the operating frequency of described frequency conversion fan is in maximum, in the time that blast need to being increased, start any one fan operation.
3. industrial furnace air supply method according to claim 1, is characterized in that:
When the air door of described constant speed blower fan in minimum aperture, in the time of need to reducing blast, close any one blower fan.
4. industrial furnace air supply method according to claim 3, is characterized in that:
While closing blower fan, close described constant speed blower fan.
5. industrial furnace air supply method according to claim 1, is characterized in that:
When described industrial furnace supply air system starts, start described frequency conversion fan.
6. an industrial furnace supply air system, comprising: air supply duct, several frequency conversion fans that are connected, is connected several constant speed blower fan and controllers with described air supply duct with described air supply duct; It is characterized in that:
When needs increase blast, the aperture that described controller is first controlled the air door of described frequency conversion fan increases; When the air door of described frequency conversion fan is in maximum opening, while also needing to increase blast, the aperture that described controller is controlled the air door of described constant speed blower fan increases; When the air door of described constant speed blower fan is also in maximum opening, while still needing to increase blast, described controller is controlled described frequency conversion fan increases operating frequency;
When needs reduce blast, described controller is controlled described frequency conversion fan and is reduced operating frequency; When described frequency conversion fan is in minimum frequency of operation, while also needing to reduce blast, the aperture that described controller is controlled the air door of described frequency conversion fan reduces; When the air door of described frequency conversion fan is in minimum aperture, while also needing to reduce blast, the aperture that described controller is controlled the air door of described constant speed blower fan reduces.
7. industrial furnace supply air system according to claim 6, is characterized in that:
When the operating frequency of described frequency conversion fan is in maximum, in the time of need to increasing blast, described controller starts any one fan operation.
8. industrial furnace supply air system according to claim 6, is characterized in that:
When the air door of described constant speed blower fan in minimum aperture, in the time of need to reducing blast, described controller cuts out any one blower fan.
9. industrial furnace supply air system according to claim 8, is characterized in that:
While closing blower fan, described controller cuts out described constant speed blower fan.
10. industrial furnace supply air system according to claim 6, is characterized in that:
When described industrial furnace supply air system starts, described controller starts described frequency conversion fan.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08247444A (en) * | 1995-03-10 | 1996-09-27 | Mitsubishi Heavy Ind Ltd | Control for boiler induced draft fan |
| GB2299414A (en) * | 1995-03-28 | 1996-10-02 | British Steel Plc | Combustion air supply system |
| DE29924386U1 (en) * | 1998-05-11 | 2003-02-27 | Dreizler Ulrich | Boiler system fueled by gas of oil uses frequency converter to supply air control fan provides clean, efficient combustion for central heating installation |
| CN102661283A (en) * | 2012-05-14 | 2012-09-12 | 山东电力研究院 | Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof |
| CN103671192A (en) * | 2013-11-26 | 2014-03-26 | 北海恒久天成技术开发有限公司 | Method for adjusting air quantity of variable-frequency fan |
-
2014
- 2014-04-22 CN CN201410163159.5A patent/CN104141964B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08247444A (en) * | 1995-03-10 | 1996-09-27 | Mitsubishi Heavy Ind Ltd | Control for boiler induced draft fan |
| GB2299414A (en) * | 1995-03-28 | 1996-10-02 | British Steel Plc | Combustion air supply system |
| DE29924386U1 (en) * | 1998-05-11 | 2003-02-27 | Dreizler Ulrich | Boiler system fueled by gas of oil uses frequency converter to supply air control fan provides clean, efficient combustion for central heating installation |
| CN102661283A (en) * | 2012-05-14 | 2012-09-12 | 山东电力研究院 | Power frequency and variable frequency mixed working condition power station fan RB control system and control method thereof |
| CN103671192A (en) * | 2013-11-26 | 2014-03-26 | 北海恒久天成技术开发有限公司 | Method for adjusting air quantity of variable-frequency fan |
Non-Patent Citations (3)
| Title |
|---|
| 仲振明: "《高压变频器应用手册》", 31 May 2009, article "第6章 九洲电气变频器", pages: 322-325 * |
| 姚家玲: "锅炉送风电机增装变频调速器", 《上海中大型电机》, 15 June 2005 (2005-06-15), pages 44 - 45 * |
| 张广辉，谢碧荣: "锅炉送风控制系统的变频调速改造", 《重庆电力高等专科学校学报》, vol. 5, no. 3, 15 August 2000 (2000-08-15), pages 34 - 36 * |
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