CN104141964B - Industrial furnace supply air system and method - Google Patents
Industrial furnace supply air system and method Download PDFInfo
- Publication number
- CN104141964B CN104141964B CN201410163159.5A CN201410163159A CN104141964B CN 104141964 B CN104141964 B CN 104141964B CN 201410163159 A CN201410163159 A CN 201410163159A CN 104141964 B CN104141964 B CN 104141964B
- Authority
- CN
- China
- Prior art keywords
- frequency conversion
- blast
- fan
- air door
- blower fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention provides a kind of industrial furnace air supply method, and when needs increase blast, the aperture of the air door of frequency conversion fan increases; When also needing to increase blast, the aperture of the air door of constant speed blower fan increases; When still needing to increase blast, described frequency conversion fan increases operating frequency; When needs reduce blast, described frequency conversion fan reduces operating frequency; When also needing to reduce blast, the aperture of the air door of described frequency conversion fan reduces; When also needing to reduce blast, the aperture of the air door of described constant speed blower fan reduces. Its advantage is only part blower fan to be carried out frequency conversion transformation for the blower fan unit adopting air door regulative mode to run. On the basis realizing frequency conversion stable regulation blast, then with other blower fan cooperation control, be incorporated to overall blower fan unit pipe network steady running.
Description
Technical field
The present invention relates to a kind of industrial furnace supply air system and method thereof, in industrial furnace combustion processes, 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, by changing blade angle within the scope of 90 degree, and the output pressure parameter of control house steward. Program feature is that cost of investment is lower, but damper adjustment adds pipe resistance what accomplish to throttle simultaneously, and motor needs to consume additional electrical energy for overcoming the pipe resistance of increase, causes energy consumption to increase.
Along with the development of motor frequency conversion technology, the adjustment of more domestic monomer blower fans starts to adopt variable frequency adjustment technology, and speed control by frequency variation all has high speed efficiency in wide speed range, so being a kind of more satisfactory speed governing mode. Abroad, such as the flourishing industrial country such as German, Japanese, in the adjustment of Pumps & Fans, speed control by frequency variation is generally applied. Domestic high-parameters, the Pumps & Fans of Large Copacity power station unit also often adopt gearshift adjustment 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 typhoon machine, adopts the investment of frequency conversion scheme may be 15��20 times of air door regulation scheme. General large production equipment is all multiple stage blower fan paired running at ordinary times, if all adopting frequency conversion drive blower fan, invests too big.
Therefore, early stage blower fan unit due to converter technique also immature, all adopt air door regulation technology control blast, present project begun newly, if unit number of units is more, be limited to investment excessive, still can preferentially adopt air door regulation technology.
Summary of the invention
The object of the present invention aims to provide a kind of industrial furnace air supply method, to overcome the existing defects of above-mentioned prior art.
The present invention provides a kind of industrial furnace air supply method, and 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, in addition it is also necessary to when increasing 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, it is still necessary to when increasing 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, in addition it is also necessary to when reducing blast, the aperture of the air door of frequency conversion fan reduces; When the air door of frequency conversion fan is in minimum aperture, in addition it is also necessary to when reducing blast, the aperture of the air door of constant speed blower fan reduces.
Further, the present invention provides a kind of industrial furnace air supply method, it is also possible to have such feature: when the operating frequency of frequency conversion fan is in maximum, it is necessary to when increasing blast, start any one fan operation.
Further, the present invention provides a kind of industrial furnace supply air system, it is also possible to have such feature: when constant speed blower fan air door be in minimum aperture, it is necessary to when reducing blast, close any one blower fan.
Further, the present invention provides a kind of industrial furnace air supply method, it is also possible to has such feature: when closing blower fan, closes constant speed blower fan.
Further, the present invention provides a kind of industrial furnace air supply method, it is also possible to has such feature: when industrial furnace supply air system starts, starts frequency conversion fan.
In addition, the present invention provides a kind of industrial furnace supply air system, comprising: air supply duct, and some the frequency conversion fans being connected with air supply duct are connected some constant speed blower fans and controller with air supply duct; When needs increase blast, the aperture that controller first controls the air door of frequency conversion fan increases; When the air door of frequency conversion fan is in maximum opening, in addition it is also necessary to when increasing blast, the aperture of the air door of controller control constant speed blower fan increases; When the air door of constant speed blower fan is also in maximum opening, it is still necessary to when increasing blast, controller control frequency conversion fan increases operating frequency; When needs reduce blast, controller control frequency conversion fan reduces operating frequency; When frequency conversion fan is in minimum frequency of operation, in addition it is also necessary to when reducing blast, the aperture of the air door of controller control frequency conversion fan reduces; When the air door of frequency conversion fan is in minimum aperture, in addition it is also necessary to when reducing blast, the aperture of the air door of controller control constant speed blower fan reduces.
Further, the present invention provides a kind of industrial furnace supply air system, it is also possible to have such feature: when the operating frequency of frequency conversion fan is in maximum, it is necessary to when increasing blast, controller starts any one fan operation.
Further, the present invention provides a kind of industrial furnace supply air system, it is also possible to have such feature: when constant speed blower fan air door be in minimum aperture, it is necessary to when reducing blast, controller cuts out any one blower fan.
Further, the present invention provides a kind of industrial furnace supply air system, it is also possible to having such feature: when closing blower fan, controller cuts out constant speed blower fan.
Further, the present invention provides a kind of industrial furnace supply air system, it is also possible to having such feature: when industrial furnace supply air system starts, controller starts frequency conversion fan.
The beneficial effect of the invention
The present invention provides a kind of industrial furnace supply air system and method, for the blower fan unit adopting air door regulative mode to run, only part blower fan is carried out frequency conversion transformation. On the basis realizing frequency conversion stable regulation blast, then with other blower fan cooperation control, be incorporated to overall blower fan unit pipe network steady running. Being regulated by Intelligent closed-loop bivariate, the blast control regulated by air door and the blast control cooperation control of variable frequency adjustment, reach and invest object low, good energy-conserving effect.
The present invention provides a kind of industrial furnace supply air system and method, utilize PLC system to blower fan unit inlet throttle opening and motor frequency conversion frequency cooperation control, minimumization pipeline windage, reduce power loss, make it to reach and can stablize blast, satisfied production, the object that power consumption minimumization is run can be realized again. Control accuracy height of the present invention, energy-saving effect is obvious, effectively reduces facility investment.
The present invention provide a kind of industrial furnace supply air system and method industrial furnace blower fan unit blast control accuracy and energy-conservation in effect remarkable, the specific performance index of test-results is as follows:
A. system operating ratio >=99.95%
B. electric power consumption per ton steel decline >=15% relatively
C. system mean free error time (MTBF) >=8760h
Accompanying drawing explanation
Fig. 1 is the structural representation of the industrial furnace supply air system of the present invention.
Fig. 2 is the regulable control schema of the industrial furnace supply air system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Fig. 1 is the structural representation of the 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, user equipment 5, check baffle plate 6, wind pressure sensor, controller and control panel. User equipment is the equipment that hotblast stove or blast furnace etc. need blower fan to blow.
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. Actual blast and the blast steady state value of setting that wind pressure sensor is tested by controller compare, and control blower fan running according to comparative result.
Tradition regulative mode mainly regulates inlet vane control blast, and all blower fans are constant speed blower fan. For preventing each arm voltage supply inconsistent, causing gas backstreaming or check baffle plate action, 6 typhoon machine throttle openings need to be unified to regulate, and throttle opening regulation range is 0 �㡫90 ��. When throttle opening is 0 ��, house steward's blast is zero; When throttle opening is 90 ��, house steward's blast designs peak pressure (such as 10Kpa) for blower fan. If manifold pressure need to remain on middle certain value (such as 7Kpa), it is necessary to corresponding adjustment throttle opening is 0 �� to 90 �� a certain angle. When customer flow changes, manifold pressure can fluctuate thereupon, and when customer flow increases, manifold pressure can reduce, it is necessary to increases throttle opening and supplements air quantity; When customer flow reduces, manifold pressure can increase, it is necessary to reduces throttle opening and reduces air quantity.
Industrial furnace supply air system provided by the invention, changes 2#, 4# blower fan wherein into frequency conversion fan by constant speed blower fan, when needs control manifold pressure remains on steady state value, it is possible to adopt and change inlet vane simultaneously, and change frequency conversion fan running frequency two kinds of methods. In order to prevent each arm from occurring, air pours in down a chimney or check baffle plate action on the one hand, on the other hand for keeping blower fan energy-saving run, should ensure that throttle opening is as far as possible big, and frequency conversion frequency reduces. Air door regulates and the cooperation control of frequency conversion frequency is crucial.
When operating in 1��2 typhoon machine, controller preferentially starts frequency conversion fan. When only there being frequency conversion fan 22 to run, controller can comprehensive adjustment frequency conversion fan air door 22-1, frequency conversion fan 22 running frequency, when blast regulates from low to high, keep frequency conversion fan 22 running frequency at Schwellenwert, frequency conversion fan air door 22-2 aperture regulates blast closed loop to run, due to the needs that blast increases, frequency conversion fan air door 22-2 aperture will certainly be increased gradually. When blast is stabilized in set(ting)value, remain on air door closed loop adjustment state; Arrive state of saturation when frequency conversion fan air door 22-2 aperture regulates, and when still needing to increase blast, heighten frequency conversion fan 22 running frequency gradually. When blast is stabilized in set(ting)value, remain on frequency closed loop adjustment state. When frequency adjustment arrives state of saturation, add and start other blower fan.
When blast regulates from high to low, perform by aforementioned process phase reverse-order; Namely preferentially turn down frequency conversion fan 22 running frequency, when frequency adjustment arrives minimum operation frequency, reduce frequency conversion fan air door 22-2 aperture. When the aperture of frequency conversion fan 22 is minimum, when still needing to reduce blast, controller stops a frequency conversion fan 22.
If when frequency conversion fan 22 starts as main air blower, when the blast run according to the mode only having frequency conversion fan 22 to work cannot reach blast set(ting)value, it should add a constant speed blower fan 21, now, frequency conversion fan and the same operate of constant speed blower fan.
When frequency conversion fan and constant speed blower fan are with operate, it is necessary to 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, it is necessary to maintenance frequency conversion fan 22 running frequency in minimum value, first carries out frequency conversion fan air door 22-2 closed loop adjustment state in Schwellenwert, constant speed air door of fan 21-1 aperture. Along with blast increases, enter constant speed blower fan 21-1 throttle opening adjustment state. After the adjustment 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, perform by aforementioned process phase reverse-order. The order of this adjustment is that running frequency-turn down the frequency conversion fan air door 22-2-lowering frequency conversion fan 22 turns constant speed air door of fan 21-1-down and stops a typhoon machine. Controller preferentially cuts out constant speed blower fan 21.
Under Special Circumstances, such as frequency conversion fan generation fault, there will be only constant speed blower fan 21 and run. When only there being constant speed fan operation, still adopt the traditional way regulating manifold pressure according to air door.
Inlet vane baffle opening and blower fan frequency cooperation control principle of work:
When whole system only needs operation 1��2 typhoon machine, preferentially running frequency conversion fan, blast is stabilized in set(ting)value by as above variable frequency adjustment mode. When system needs additional 1��2 constant speed motor, air quantity, blast must be not enough, frequency conversion fan is by closed-loop control as above, maximum frequency 50Hz state must be operated in, even if now starting constant speed motor immediately, also can not occur that air pours in down a chimney, during actual input constant speed motor wind road, first start constant speed when air door closes entirely, then air door is opened gradually from fully closed state. When ductwork pressure returns to setting pressure, air door stops opening. When air quantity is superfluous, blast is bigger than normal, preferentially stop constant speed motor. When stopping constant speed motor, air quantity must be superfluous, frequency conversion fan, by closed-loop control as above, must be operated in minimum operating frequency (the frequency conversion frequency that non-return check valve is washed in definition open is minimum operating frequency, and now frequency conversion fan is supplied pressure to be greater than manifold pressure), before closing constant speed motor, reducing air door gradually, after air door is closed, constant speed blower fan is out of service, in the process closing air door, by improving, air door reduction is compensated frequency conversion fan by operating frequency.
Fig. 2 is the regulable control schema of the industrial furnace supply air system of the present invention.
As shown in Figure 2, frequency conversion and air door regulate and all can be had an impact by ductwork pressure, and therefore this Controlling System is bivariate system. Bivariate system need to be carried out uneoupled control, and uneoupled control problem representation selects suitable control law that a multi-variable system turns to the control problem of multiple independent single argument system. After realizing decoupling zero, a multiple-input and multiple-output Controlling System just relieves the cross-couplings between input, output variable, thus realizes autonomous control, the control being namely independent of each other.
When constant speed, frequency conversion fan put into operation simultaneously:
For reducing power loss, constant speed, frequency conversion fan air door all preferentially keep maximum, by regulating frequency conversion frequency control house steward's blast. When frequency is reduced to fmin, if system wind pressure is still bigger than normal, then by regulating constant speed throttle opening control blast. If frequency reach fmin, when constant speed air door of fan aperture is minimum, if house steward's blast is still bigger than normal, then by regulate frequency conversion air door control system blast. When frequency reaches rmin, when constant speed, frequency conversion throttle opening all reach minimum, if house steward's blast is still bigger than normal, then system request stops 1 typhoon machine. When constant speed, frequency conversion air door all keep maximum, and frequency conversion frequency has reached fmax, if when house steward's blast is still less than normal, system request adds 1 typhoon machine.
Taking Baosteel hot rolling 1580 process furnace burner blower as subjects, carry out reforming test with industrial furnace supply air system provided by the invention and method. Particular case is as follows:
Baogang Stocks Trading Co. 1580 hot rolling has three walking beam furnaces at present, and due to production capacity reason, in most cases, general two stoves are produced. Every process furnace is all provided with two burner blowers when designing provides combustion air. In actual motion, from energy-conservation angle, when two process furnace come into operation, usually only open 2��3 burner blowers, under rare occasion, also have the situation running 1 or 4. These burner blowers, by regulating its import baffle opening, at guarantee process furnace entrance combustion air pressure when 7kpa, meet process furnace and normally run the demand to air quantity. At present, fans entrance throttle opening changes between being limited at 30%��72%, when aperture is lower than 30%, then reduces by a fan operation, when aperture is greater than 72%, then increases a fan operation. Take fan as constant speed blower fan.
1580 hot-rolling heating furnace burner blowers have 6, and the nominal parameter of these blower fans is as follows:
| Rated flow | 84400m3/h |
| Specified total head | 13000pa |
| Voltage rating | 6000V |
| Rated current | 47��49A |
| Rated output | 400��410kW |
| Specified speed | 1480rpm |
Before transformation, 1580 hot-rolling heating furnace burner blowers adopt inlet vane regulative mode, when meeting production requirement, also there are two problems simultaneously:
1, baffle plate regulates and adds pipe resistance what accomplish to throttle simultaneously, and motor needs to consume additional electrical energy for overcoming the pipe resistance of increase, causes energy consumption to increase;
2, the efficiency of controllable register aperture is lower, and the adjustment response of blast change is slow;
After transformation:
2#, 4# blower fan of six typhoon machines carries out frequency conversion transformation, greatly reduces air door and regulates the throttling loss caused, and the operational efficiency that Pumps & Fans can be made within the scope of very big varying duty to keep higher, greatly reduces the energy consumption of burner blower.
When operating in 1��2 typhoon machine, preferentially starting frequency conversion fan, keep frequency conversion fan air door maximum opening, control ductwork pressure by variable frequency adjustment, at this moment constant speed motor is in stopping state, and air door closes entirely. When blast is not enough, it is necessary to when adding air quantity, then add 1��2 constant speed blower fan in addition. Starting blower fan, generally first start motor, then Time Delay Opening air door, along with air door is opened gradually by entirely closing, blast recovers gradually, and when pipe network blast meets process requirements, namely air door remains on this position. When air quantity demand reduces, when blast is on the rise, then preferentially stop the blower fan of constant-speed operation. Stop constant speed blower fan, first slowly close air door, when air door is fully closed, close constant speed blower fan. In the process closing 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, owing to frequency conversion fan speed setting regulates faster than air door greatly, air quantity can be supplemented rapidly, make whole system stability at new trim point.
Transform postindustrial stove supply air system and have following several working order:
One, only there is constant speed blower fan working order
When constant speed fan operation, the inlet vane aperture of blower fan slowly rises with very little amplitude under manual mode and chases after constant speed air door PID controller output value, when throttle opening catch up with constant speed air door PID output value, the control mode of air door becomes automated manner from manual switchover, and the aperture of fans entrance variable valve is controlled by pressure controller PID. When blower fan controls automatically, having 2 apertures spacing, one is additional aperture 72%, is stop aperture 30%, and both values can set in control panel. When the aperture of fans entrance variable valve exceedes additional aperture 72% and the time delay time arrives, the blower fan being selected as adding is started by control. Equally, when additional blower fan just starts to run, the inlet adjustment valve of blower fan slowly rises with very little amplitude under manual mode, rise to always the inlet adjustment valve aperture with main air blower equal time, the master mode adding fans entrance variable valve becomes automatically from manual switchover, the then aperture of the inlet adjustment valve of pressure P ID regulating main air machine and additional blower fan. The startup of later additional blower fan is also same. Arriving with stopping aperture 30% and time delay time when the inlet adjustment valve aperture of the blower fan run is little, button control panel stopping confirm will have red background flicker, have sound to report to the police, alert simultaneously. Now, operator select a certain additional blower fan to be stopping machine. Afterwards, pressing stopping acknowledge-button, the pattern of fans entrance variable valve will switch to aperture will according to a fixed speed decline, and when aperture drops to 0.1%, blower fan stops automatically.
Two, only there is frequency conversion fan working order
When selecting 2# frequency conversion fan to run as main air blower, meanwhile, select 4# blower fan for adding blower fan. Can clicking " startup " button on control panel, start main air blower, after fan operation, the color of control panel fan icon becomes red from green. Blower fan frequency first increases when increasing to 35Hz, and then the air door of its correspondence is opened with the speed of every second 0.2, 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 Drazin inverse of the frequency conversion air door PID controller that the aperture of air door is followed. When throttle opening is to 100%, if when the actual value of pressure controller does not exceed set(ting)value, the PID starting to carry out frequency conversion frequency regulates. The frequency of blower fan increases from 35Hz, and when increasing adds blower fan to prompting when additional frequency and 48Hz, frequency maxima is 50Hz. Time delay for some time, the 4# blower fan being chosen as additional blower fan starts automatically, and the aperture of 4# air door now chases after the output value of 2# frequency conversion fan in a manual fashion, switches automated manner after catching up with; Then 4# frequency conversion fan frequency chases after the frequency of 2# frequency conversion fan, catch up with the adjustment of heel with frequency PID controller. When frequency conversion throttle opening be less than stop aperture (can set on the control panel) namely 30% time, button control panel stopping confirm will have red background to glimmer, and have sound to report to the police, alert simultaneously. Now, operator select a certain additional blower fan to be stopping machine, afterwards, pressing stopping acknowledge-button, the pattern of fans entrance variable valve will switch to manually and decline with a fixed speed, when aperture drops to 0.1%, starting 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 the same reason of additional blower fan.
Three, existing constant speed blower fan has again frequency conversion fan working order
If when frequency conversion fan starts as main air blower, run according to the mode only having frequency conversion fan to work. When adding a constant speed blower fan (mode that adds is as only there being constant speed working order), the air door manual unlocking of constant speed blower fan chases after the output value of constant speed PID controller, frequency is being fallen simultaneously, when throttle opening catch up with after constant speed PID exports, 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 measured is < during setting blast, first carry out frequency conversion air door PID to regulate, when the aperture of frequency conversion air door is greater than 100%, carries out constant speed air door PID and regulate, when constant speed throttle opening is greater than 100%, carry out frequency conversion frequency PID to regulate, when reach additional frequency (can set on the control panel) namely 48Hz time, control panel adds the button confirmed will red background flicker, have sound to report to the police simultaneously, alert adds blower fan, frequency conversion maximum frequency 50Hz.
When measure actual blast > determine blast time, first carry out adjusting frequency conversion frequency PID to regulate, when frequency conversion frequency is less than 48Hz, carry out constant speed air door PID to regulate, when constant speed throttle opening is less than 35%, carry out frequency conversion air door PID to regulate, when frequency conversion throttle opening is less than frequency conversion air door stopping aperture (can set on the control panel) 75%, the button stopping confirming will have red background flicker, there is sound to report to the police simultaneously, alert stops a typhoon machine, the minimum aperture 70% of frequency conversion air door.
Same control mode is had when multiple stage constant speed blower fan and frequency conversion fan when having.
Industrial furnace supply air system is centered by Fan Regulation PLC, taking frequency transformer, throttle opening as performing object, take HMI system as process monitoring, using the data exchange maincenter of Fan Regulation PLC as whole system, carry the data communication between each system, data perform and instruction transformation and distribution.
Blower fan control system (PLC) realizes constant speed/frequency conversion fan, the long-range start and stop of air door, closed loop cooperation control. Finishing equipment monitoring HMI system intuitively reflects operational process, display equipment state, and record ductwork pressure, data on flows complete the functions such as regulating parameter setting and alarm logging, operating record, network diagnosis. Profibus and industry ethernet communication is adopted between air-blower control PLC and high voltage frequency converter, HMI, improve speed, reliability and security that data among systems processes, meanwhile, for expansion and the transformation of later system provide the advanced network architecture.
Industrial furnace supply air system system test-results display: system cloud gray model is stablized, and energy-saving effect is obvious, and adds ductwork pressure control accuracy, reduces electric power consumption per ton steel. This regulation system is by the application of Baosteel process furnace, having grasped blower fan reducing energy consumption control techniques, 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 height.
Claims (9)
1. an industrial furnace air supply method, it is characterised 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, in addition it is also necessary to when increasing 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, it is still necessary to when increasing 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, in addition it is also necessary to when reducing 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, in addition it is also necessary to when reducing blast, the aperture of the air door of described constant speed blower fan reduces;
When the operating frequency of described frequency conversion fan is in maximum, it is necessary to when increasing blast, start any one fan operation.
2. industrial furnace air supply method according to claim 1, it is characterised in that:
When described constant speed blower fan air door be in minimum aperture, it is necessary to reduce blast time, close any one blower fan.
3. industrial furnace air supply method according to claim 2, it is characterised in that:
When closing blower fan, close described constant speed blower fan.
4. industrial furnace air supply method according to claim 1, it is characterised in that:
When described industrial furnace supply air system starts, start described frequency conversion fan.
5. an industrial furnace supply air system, comprising: air supply duct, and some the frequency conversion fans being connected with described air supply duct are connected some constant speed blower fans and controller with described air supply duct; It is characterized in that:
When needs increase blast, the aperture that described controller first controls the air door of described frequency conversion fan increases; When the air door of described frequency conversion fan is in maximum opening, in addition it is also necessary to when increasing blast, the aperture that described controller controls 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, it is still necessary to when increasing blast, described controller controls described frequency conversion fan and increases operating frequency;
When needs reduce blast, described controller controls described frequency conversion fan and reduces operating frequency; When described frequency conversion fan is in minimum frequency of operation, in addition it is also necessary to when reducing blast, the aperture that described controller controls the air door of described frequency conversion fan reduces; When the air door of described frequency conversion fan is in minimum aperture, in addition it is also necessary to when reducing blast, the aperture that described controller controls the air door of described constant speed blower fan reduces.
6. industrial furnace supply air system according to claim 5, it is characterised in that:
When the operating frequency of described frequency conversion fan is in maximum, it is necessary to when increasing blast, described controller starts any one fan operation.
7. industrial furnace supply air system according to claim 5, it is characterised in that:
When described constant speed blower fan air door be in minimum aperture, it is necessary to reduce blast time, described controller cuts out any one blower fan.
8. industrial furnace supply air system according to claim 7, it is characterised in that:
When closing blower fan, described controller cuts out described constant speed blower fan.
9. industrial furnace supply air system according to claim 5, it is characterised in that:
When described industrial furnace supply air system starts, described controller starts described frequency conversion fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163159.5A CN104141964B (en) | 2014-04-22 | 2014-04-22 | Industrial furnace supply air system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163159.5A CN104141964B (en) | 2014-04-22 | 2014-04-22 | Industrial furnace supply air system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104141964A CN104141964A (en) | 2014-11-12 |
| CN104141964B true CN104141964B (en) | 2016-06-08 |
Family
ID=51851227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410163159.5A Active CN104141964B (en) | 2014-04-22 | 2014-04-22 | Industrial furnace supply air system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104141964B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569064B (en) * | 2016-10-27 | 2019-02-26 | 重庆承亿机电设备有限公司 | Frequency converter and its frequency Setting signal fault detection method |
| CN108249164A (en) * | 2016-12-29 | 2018-07-06 | 贵州中烟工业有限责任公司 | A kind of application method of vacuum control system |
| CN108263862A (en) * | 2016-12-30 | 2018-07-10 | 贵州中烟工业有限责任公司 | A kind of stem blast system and its vacuum control system |
| CN107120677B (en) * | 2017-06-01 | 2020-09-29 | 上海联达节能科技有限公司 | Method and system for automatically controlling combustion-supporting air pressure of heating furnace |
| CN109844170A (en) * | 2017-09-25 | 2019-06-04 | 应用材料公司 | For cleaning the system of vacuum chamber, the method for cleaning vacuum chamber and the purposes of the compressor for cleaning vacuum chamber |
| CN111089296A (en) * | 2019-12-30 | 2020-05-01 | 江苏弘成环保科技有限公司 | Automatic control method for fresh air supply of hazardous waste incineration rotary kiln |
| CN112783224B (en) * | 2020-12-30 | 2023-01-13 | 中国长江电力股份有限公司 | Pressure maintaining system adopting variable-frequency pressure maintaining equipment and self-adaptive control method |
| CN113005251A (en) * | 2021-02-22 | 2021-06-22 | 宝钢湛江钢铁有限公司 | Energy-saving environment-friendly combustion fan system of large-scale blast furnace hot blast stove |
| CN113137394B (en) * | 2021-03-25 | 2022-09-27 | 武汉钢铁有限公司 | Control method and control system of booster fan and industrial control equipment |
| CN113566231A (en) * | 2021-09-06 | 2021-10-29 | 南京钢铁股份有限公司 | Energy-saving control method for combustion fan of heating furnace |
| CN115787651A (en) * | 2022-11-14 | 2023-03-14 | 中铁一局集团有限公司 | Large-volume bearing platform concrete 5G intelligent cold air medium temperature control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| 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 |
-
2014
- 2014-04-22 CN CN201410163159.5A patent/CN104141964B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (2)
| Title |
|---|
| 锅炉送风控制系统的变频调速改造;张广辉，谢碧荣;《重庆电力高等专科学校学报》;20000815;第5卷(第3期);第34-36页 * |
| 锅炉送风电机增装变频调速器;姚家玲;《上海中大型电机》;20050615;第44-45页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104141964A (en) | 2014-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104141964B (en) | Industrial furnace supply air system and method | |
| CN100362295C (en) | Automatic volume regulating and controlling method for gas-burning machine heat pump | |
| CN109917646B (en) | System and method for optimizing operation of regional cooling and heating equipment | |
| CN102121741B (en) | Multi-connection air conditioning unit and control method thereof during small-load refrigeration running | |
| CN104374036B (en) | The control method and air-conditioner set of air-conditioning | |
| CN108489012A (en) | Cold source of air conditioning energy efficiency model control method based on load prediction and constraint | |
| CN108168052B (en) | optimal start-stop control method for central air-conditioning refrigeration system | |
| CN105444356A (en) | Intelligent energy efficiency optimizing control system for central air conditioning system and control method of intelligent energy efficiency optimizing control system | |
| CN114440410B (en) | Variable flow control method for freezing and cooling water pump based on heat exchange efficiency | |
| CN103206767A (en) | Energy-saving control method and device for frequency conversion air conditioner | |
| CN201129827Y (en) | Central air conditioner control equipment | |
| CN108119990B (en) | Air source heat pump and its control method and device | |
| CN201292954Y (en) | Water pump and/or blower fan highly effective energy-conserving control system | |
| CN113701321B (en) | Energy-saving frequency conversion control method for central air-conditioning water pump | |
| CN109237708A (en) | Control method for air-conditioner set | |
| CN109654887B (en) | Circulating water cooling system and automatic control method thereof | |
| CN115823706B (en) | Self-adaptive variable pressure difference energy-saving control system and method for primary pump | |
| CN105157177B (en) | Method for controlling outlet water temperature of cooling tower according to outdoor air state | |
| CN108507245B (en) | Nested closed-loop full-automatic industrial circulating cooling control system and control method | |
| CN110529417A (en) | A kind of automatic on-line of multi-machine parallel connection Systems of Centrifugal Compressor Unit cuts machine operating method | |
| CN101922779A (en) | Fan coil system and control method and device thereof | |
| CN114294789A (en) | Control method of air conditioning system, air conditioning system and air conditioner | |
| CN1297787C (en) | Chilled water energy-saving apparatus of cental air conditioner | |
| CN110864416A (en) | Start-stop optimization control method for central air-conditioning system | |
| CN203274139U (en) | Intelligent control system based on air conditioner cooling water system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |