CN104454615A - Dust remover air volume and air pressure intelligent control and energy saving system and control method thereof - Google Patents
Dust remover air volume and air pressure intelligent control and energy saving system and control method thereof Download PDFInfo
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- CN104454615A CN104454615A CN201410819527.7A CN201410819527A CN104454615A CN 104454615 A CN104454615 A CN 104454615A CN 201410819527 A CN201410819527 A CN 201410819527A CN 104454615 A CN104454615 A CN 104454615A
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- 239000000428 dust Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000033228 biological regulation Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000003245 working effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 9
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000010410 dusting Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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Abstract
The invention discloses a dust remover air volume and air pressure intelligent controlling and energy-saving system and a control method thereof. The system comprises flow monitors, a frequency converter and a PLC or single-chip microcomputer controller, holes are formed in any positions of the rear end of a dust collection port of any dust remover and the front end of a dust removal filter bag, the flow monitors are added at the holes, and an energy saving purpose is realized. According to the dust remover air volume and air pressure intelligent controlling and energy-saving system and the control method thereof, waste caused by the design and type of dust removal equipment is avoided, reactive loss of a motor is reduced, service lives of a fan motor and the dust remover are prolonged, self-adaption adjustment of the air volume and air pressure is realized, and energy saving of the working condition of instable air volume treatment is improved greatly.
Description
Technical field
The present invention relates to dusting apparatus control field, be specifically related to a kind of deduster air quantity, intelligent wind pressure regulation and control and energy conserving system and controlling method thereof.
Background technique
The all types deduster of current use, employing be constant wind quantity, blast export pattern.Because of during engineering design for deduster mate blower fan time, when except theory calculate gained fan delivery, blast, still need to add some factor following:
1) inleakage of each joint in outer case of dust remover, deduster and outside;
2) pipeline is because of the resistance Expenditure Levels of turning or inner-walls of duct;
3) the fan pressure head deviation that causes of the atmospheric pressure deviation of user location;
4) unstability produced when blower fan manufacturer manufactures;
5) situation under theoretical limit operating mode;
6) the extracting of model (model that buying market produces can only be extracted) during Fan Selection;
7) a multiple collection (likely working at the same time or separately) of gathering dust a little of dust collector;
8) situation (as unstable in evaporation tolerance, burning gas production instability) of air quantity instability need be processed.
Comprehensive what time above, under theoretical extreme case, fan delivery, blast can be amplified 35%-40% again during engineering design.Ensure that deduster equipment all can normally run in the above case with this, but also therefore cause the waste of the useless power of high degree, particularly deduster is collected and is multiplely gathered dust a little, and waste power even can up to 70%.In order to energy-conservation, the frequency variator of blower fan has a large amount of gross data and theoretical scheme in the use in energy-conservation.But uncommon in actual applications, its reason just can obtain best air quantity, blast numerical value for needing actual measurement mass data at the scene and carrying out large amount of complex calculating.Cause following problem thus: 1) proprietor operator and equipment side debug maintenance man and often do not possess this complicated calculations ability; 2) measuring point is many, surveying instrument kind too much, surveying instrument too complex precise, measures cost excessive; 3) equipment can cause again the change of data when Long-Time Service; Cause energy Saving by above-mentioned variety of problems to be difficult to effectively promote in dust removal field.
Summary of the invention
The object of the invention is the problem being difficult to popularization for deduster energy serious waste and fan frequency conversion in prior art, a kind of deduster air quantity, intelligent wind pressure is provided to regulate and control and energy conserving system, the waste that this system causes the power amplification of extreme case Fan Selection when completely eliminating design, decrease the unwanted losses of motor, extend the working life of blower fan, motor and deduster, the controlling method of this system is utilized to achieve the on-line tuning object of " actual conditions need adjust to how many voluntarily with how many, equipment ", control motor-driven, flexible, degree of accuracy is high.
For achieving the above object, the present invention adopts following technological scheme: the regulation and control of a kind of deduster air quantity, intelligent wind pressure and energy conserving system, comprise flow monitoring instrument, frequency variator and PLC or singlechip controller, to gather dust a mouthful rear end, the arbitrary position perforate of dedusting filtering bag front end at any deduster, tapping installs flow monitoring instrument additional, described PLC or singlechip controller input end are connected with flow instrument output end signal, PLC or singlechip controller output terminal are connected with inverter input signal, and described inverter output terminal connects dedusting fan.
The regulation and control of a kind of deduster air quantity, intelligent wind pressure and energy-conservation controlling method, first, setting air volume test mouth: air volume test mouth is arranged on deduster and gathers dust a mouthful rear end, arbitrary position, dedusting filtering bag front end, set up threshold values with the numerical value by detecting mouth inleakage and pressure, backstepping gathers dust actual required blast, air quantity;
Set by PLC or singlechip controller and store reference stream value V2, be specially: normal startup deduster air quantity, intelligent wind pressure regulation and control and energy conserving system, press the working condition measurement button on control panel, frequency variator reduces the speed reduction of 1HZ with every 1 ~ 7s, run slowly middle observation deduster working effect, when finding operation irregularity and leakage phenomenon, press " storage operating mode " button on control panel, numerical value V2 on PLC or singlechip controller store sampled flow instrument, and as the comparison parameter of blast, the critical threshold values of flow after V2 suitably being calculated increase;
Finally, when equipment runs production, the air quantity collected, wind pressure data signal V1 are transferred to PLC or singlechip controller by flow instrument, inner after conversion treatment at PLC or singlechip controller, the value V2 that V1 and PLC or single-chip microcomputer set compares, and obtains both difference DELTA V, PLC or single-chip microcomputer are after automatic computing, output a control signal to Frequency Converter Control end, regulate frequency variator output frequency, to control the motor speed of blower fan.
Beneficial effect of the present invention: the present invention is without the need to pressure, the air quantity loss everywhere of actual measurement dusting apparatus, adopt in the mode observing real work result, directly exclude affluence amount during designing and calculating, blast, air quantity needed for backstepping, to reach balance and rational point of penetration, avoid a large amount of calculating and measurement, and have and to change with equipment performance, operating mode and from the function of Row sum-equal matrix.Specifically have following some:
1) compensate for high-volume the caused waste of design, model: the power amplification to extreme case Fan Selection during because completely eliminating design.Accomplish the on-line tuning object of " actual conditions need adjust to how many voluntarily with how many, equipment ", such as: to install the deduster of 55kw blower fan.If annual work 300 days, works 8 hours every day, energy-conservation 35%-75%.Then add up in year and will save 46000-99000 degree electricity.
2) reactive loss of motor is reduced: by formula P=S*COS Φ, Q=S*SIN Φ.Wherein, S is apparen power, P-active power, Q-wattless power, and cos Φ is power factor.If cos Φ is larger, then active power is larger.After using RHVC, because the filter action of the inner filter capacitor of frequency variator, make cos Φ be approximately 1, thus decrease the reactive loss of motor.More because the raising of power factor, improve power grid quality, decrease the loss of equipment and the waste of electric energy in same net.
3) extend the working life of fan motor: when directly starting, inrush current is the rated current of 4 ~ 7 times, can produce serious impact to electrical network.And square being directly proportional of heat and electric current that when starting, cable produces, can cause damage to cable and motor coil.After joining variable frequency starting, the increase of electric current in start-up course can be made to become slow, decrease above-mentioned harmful effect.
4) deduster working life is extended: install rear deduster additional always at best air quantity, work under blast.All significantly reduce than not installing front air pressure air flow additional.Thus significantly alleviate the abrasion condition in dedusting filter material, dedust air duct air channel.
5) automatically regulate with the change of operating mode, have significantly energy-conservation lifting to the operating mode of process air quantity instability.
figure of description
Fig. 1 is deduster air quantity of the present invention, intelligent wind pressure regulates and controls the overall structure schematic diagram with energy conserving system;
Fig. 2 is one of working state structure schematic diagram of Fig. 1;
Fig. 3 is the working state structure schematic diagram two of Fig. 1;
Fig. 4 is the working state structure schematic diagram three of Fig. 3;
Fig. 5 is the curent change schematic diagram that blower motor directly starts;
Fig. 6 is the curent change schematic diagram that blower motor adopts variable frequency starting.
Number in the figure, 1 is deduster, and 2 is flow instrument, and 3 is blower fan, and 4 is control cabinet, and 5 is PLC, and 6 is frequency variator; 7 is dust stratification pocket, and 8 is dust remover air duct, and 9 one, 10 two, 11 is a little some wind-regulating valve one for gathering dust for gathering dust, and 12 is wind-regulating valve two, and 13 is cable.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1: a kind of deduster air quantity, intelligent wind pressure regulation and control and energy conserving system, see Fig. 1, comprise flow instrument 2, frequency variator 6 and PLC 5, the present embodiment is used for the deduster 1 shown in Fig. 1, be specially: in Fig. 1, deduster 1 has two and gather dust a little 9, 10, a top of gathering dust is respectively arranged with wind-regulating valve 11, 12, deduster 1 is provided with blower fan 3 in dedusting filtering bag upper front end position, the present embodiment to gather dust a mouthful rear end at deduster 1, dedusting filtering bag front position is offered porose, tapping places flow instrument 2, due to deduster 1 fan pressure, the calculating object of air quantity, for excluding because of pipeline length resistance, to gather dust a mouthful size requirement, the compensation that the selection of the air penetrability of dedusting filter material is different and carry out.As long as it returns the wind speed of airborne dust bleeding point of originally tracing to the source to reach optimum value can complete expection dust removing effects.But general flow instrument cannot long-term work under the work of high dust like this, and the selling at exorbitant prices of another large discharge Air Flow Rate Instrument, applying unit also cannot accept.Therefore the present embodiment flow instrument is not placed on and gathers dust a little, do not detect a mouth actual flow that gathers dust, the inner actual air volume of detection system and the blast mode in this, as data capture is substituted to detect mouth inleakage and blast, reduce the working load of flow instrument, because at wind speed, blast and the one's intention as revealed in what one says speed of gathering dust of the hole-opening of above-mentioned deduster position institute, blast being proportional relation completely, so institute's hole-opening can reflect wind speed, the blast of the mouth that gathers dust from the side.By detecting the air quantity of mouthful rear end of gathering dust, substantially reduce the size of flow instrument, and relatively reduce the equipment cost of native system, the air passed through because of flow instrument is outside clean air, so improve its working life and stability.
PLC 5 and frequency variator 6 are positioned at control cabinet 4, described PLC 5 input end is connected with flow instrument 2 output end signal, " air quantity, wind pressure data " the signal V1 collected is transferred in the PLC in control cabinet by flow instrument 2, PLC 5 output terminal is connected with frequency variator 6 input end signal, frequency variator 6 output terminal connecting fan 3 control end.PLC outputs a control signal to Frequency Converter Control end after carrying out analysing and processing to signal V1, to regulate frequency variator output frequency, controls blower motor rotating speed, reaches adjustment blast, air quantity reach energy-conservation object.
The regulation and control of above-mentioned air quantity, intelligent wind pressure and energy conserving system, as follows to the concrete controlling method of deduster: first, setting deduster air volume test mouth: air volume test mouth is arranged on deduster and gathers dust a mouthful rear end, dedusting filtering bag front position, with by detecting mouth inleakage and pressure, backstepping gathers dust required blast, air quantity;
Then, the suitable threshold values of PLC setting reference stream value V2(), be specially: suitable threshold values is determined at scene, new equipment run or Plant reconstruction plant modernization after, normal starting device work, and " working condition measurement " button pressed on control panel, the about every 6s(of frequency variator is by dedusting fan reaction time) reduce the speed reduction of 1HZ.Operator's manual observation deduster respectively gathers dust a job and equipment body situation.During as the phenomenon such as operation irregularity and leakage occurs, press " storage operating mode " button on control panel, the numerical value V2 on PLC store sampled flow instrument, and using the comparison parameter of V2 as blast, the critical threshold values of flow; The present embodiment with manual observation operating mode and the mode setting threshold values calibrate, can reduce to design the power dissipation caused with in-site installation;
When equipment runs production, the regulation and control of above-mentioned air quantity, intelligent wind pressure regulate as follows with energy conserving system with operating mode automatically: during production, " air quantity, wind pressure data " the signal V1 collected is transferred to the PLC in control cabinet by flow instrument, inner after conversion treatment in PLC, the value V2 of V1 and PLC setting compares, obtain both difference DELTA V, PLC is after the automatic computing of PID, output a control signal to Frequency Converter Control end, regulate frequency variator output frequency, to control the motor rotary speed of blower fan.The present embodiment is to compare threshold values and the mode of real-time tracing threshold values adjustment rotating speed adapts to complicated with unstable applying working condition, the working state schematic representation that specific works state is shown in Figure 2.
Once operating mode changes, such as: gather dust a little 2 10 as closed, view specifically shown in Figure 3, now blower fan is by original flow, blast output services, make to gather dust and a little one to improve with flow instrument wind speed simultaneously, after bringing up to certain standard, the monitoring numerical value on flow instrument can become large and exceed specified threshold values V2, now PLC reduces rotation speed of fan to reach specified threshold values automatically through computing, reaches energy-conservation order ground with this.Thus, a little open if only have one to gather dust, motor can reduce rotating speed automatically, to prevent the motor wasting of resources.
For another example: if only have one to gather dust a little, to gather dust source gas production instability (air quantity need be processed change) of a little getting angry, such as: the situations such as evaporation, burning appear in source of getting angry, blower fan is by original flow, blast output services, gather dust and a little can improve with flow instrument wind speed simultaneously, after certain standard, the monitoring numerical value on flow instrument can become large and exceed specified threshold values V2, and PLC can reduce rotation speed of fan automatically by computing.
For another example: as changed dedusting filter material, dedusting filter material blocks, airduct local internal leakage, fan parameter change etc. situation, duration of work are opened viewing window and patrolled and examined, and thus reduces the blast of dust pelletizing system rear end, air quantity.Then flow instrument place air quantity, blast can lower than setting threshold values, frequency variator will control blower fan, raising rotating speed compensated.
The present embodiment to install additional but not the mode of changing carries out energy saving optimizing to existing dusting apparatus, without the need to carrying out any change of structure, pipeline or mechanical aspects to original dusting apparatus, system architecture is simple, be produced into very low, to the VFC of blower fan, there is following beneficial effect tool: 1, compensate for high-volume the caused waste of design, model;
2, the reactive loss of motor is reduced:
Such as: originally fan of dust remover is that power frequency 50HZ runs, and fan motor is 11kW motor, and rotating speed is 2930r/min., and now corresponding dedusting flowmeter flow value is 19.3m3/h.
After changing adjustable systems into, can according to production technology needs, free adjustment fan of dust remover exhausting flow on suitable, reduces unnecessary air quantity waste and power wastage.When setting flow is 16 m3/h, output frequency is stabilized in 15m3/h by system automatically, and now the output frequency of frequency variator is 37 hz, and corresponding rotating speed is 2168r/min, and pulse dust collector exhausting amount now both can meet production requirement:
Energy saving calculation formula is as follows: the frequency that the frequency of setting 50Hz to export exports as f1,37Hz is f2, then that reduce is Δ f.
1. P(power)=P ' (MPa) * Q(flow);
②f2 / f1= Q2/ Q1;
③f2 / f1 = P2′ / P1′
Obtained by above-mentioned formula three formula, P2/P1=(f2/f1) 3
Export 13Hz by minimizing to calculate, now use power to be 40.5% of former power, saving energy 59.5%.Then:
1. every day energy-conservation (8hrs)=a(kW) * 8*0.595=4.76a degree electricity.
2. 365*4.76a=1737.4a degree electricity is saved every year.
Above
be theory calculate gained, a is former power consumption.
In addition, by formula P=S*COS Φ, Q=S*SIN Φ.Wherein, S is apparen power, P-active power, Q-wattless power, and cos Φ is power factor.If cos Φ is larger, then active power is larger.The power factor value of this motor is 0.88.After using RHVC, because the filter action of the inner filter capacitor of frequency variator, make cos Φ be approximately 1, thus decrease the reactive loss of about 12%.
3, extend the working life of fan motor, when direct starting electrical machinery, inrush current is the rated current of 4 ~ 7 times, can produce serious impact to electrical network.Square being directly proportional of heat and electric current that during startup, cable produces, can cause damage to cable and motor coil.After joining variable frequency starting, the increase of electric current in start-up course can be made to become slow, decrease above-mentioned harmful effect.Specifically directly start see motor and contrast schematic diagram with the curent change of variable frequency starting: Fig. 5 and Fig. 6, direct starting electrical machinery shown in Fig. 5, along with electric current starting time raises recession curve change very greatly, rising is rapid, decline is also steeper, electric current fluctuated can cause whole electrical network and motor coil and have a strong impact on, and obviously can find out that from Fig. 6 the fan starting electric current after frequency conversion is very little, rise slowly, almost unchanged after certain value, this just effectively prevent the impact of electric current on blower fan.
It should be noted that: the controller in above-described embodiment 1 can also be single-chip microcomputer, effect and the external control principle of single-chip microcomputer and PLC are identical, the present invention can be used for any one deduster, be not limited only to the deduster related in embodiment 1, the present invention is that the mode by installing additional realizes deduster air quantity, the adjustment of blast, embodiment 1 is only the explanation to the present invention's wherein a kind of mode of execution, just in order to clearer explanation technical solution of the present invention, but not one of the present invention is limited, anyly only to change at deduster itself, and adopt the technology identical with design concept of the present invention, all belong to and invade the application's patent right.
Claims (2)
1. a deduster air quantity, intelligent wind pressure regulation and control and energy conserving system, it is characterized in that: comprise flow monitoring instrument, frequency variator and PLC or singlechip controller, to gather dust a mouthful rear end, the arbitrary position perforate of dedusting filtering bag front end at any deduster, tapping installs flow monitoring instrument additional, described PLC or singlechip controller input end are connected with flow instrument output end signal, PLC or singlechip controller output terminal are connected with inverter input signal, and described inverter output terminal connects dedusting fan.
2. one kind as claimed in claim 1 to the controlling method of deduster air quantity, intelligent wind pressure regulation and control and energy conserving system, it is characterized in that: first, setting air volume test mouth: air volume test mouth is arranged on deduster and gathers dust a mouthful rear end, arbitrary position, dedusting filtering bag front end, set up threshold values with the numerical value by detecting mouth inleakage and pressure, backstepping gathers dust actual required blast, air quantity;
Set by PLC or singlechip controller and store reference stream value V2, be specially: normal startup deduster air quantity, intelligent wind pressure regulation and control and energy conserving system, press the working condition measurement button on control panel, frequency variator reduces the speed reduction of 1HZ with every 1 ~ 7s, run slowly middle observation deduster working effect, when finding operation irregularity and leakage phenomenon, press " storage operating mode " button on control panel, numerical value V2 on PLC or singlechip controller store sampled flow instrument, and as the comparison parameter of blast, the critical threshold values of flow after V2 suitably being calculated increase;
Finally, when equipment runs production, the air quantity collected, wind pressure data signal V1 are transferred to PLC or singlechip controller by flow instrument, inner after conversion treatment at PLC or singlechip controller, the value V2 that V1 and PLC or single-chip microcomputer set compares, and obtains both difference DELTA V, PLC or single-chip microcomputer are after automatic computing, output a control signal to Frequency Converter Control end, regulate frequency variator output frequency, to control the motor speed of blower fan.
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| CN106925586A (en) * | 2017-04-06 | 2017-07-07 | 江苏永钢集团有限公司 | A kind of many suction inlet deduster wind speed intelligent regulating systems |
| CN113530858A (en) * | 2020-04-21 | 2021-10-22 | 埃净环保科技(上海)有限公司 | Multifunctional negative-pressure multipoint air flow collecting device |
| CN115027974A (en) * | 2022-07-02 | 2022-09-09 | 中国矿业大学 | Control system for ore tank unloading and dust removal, dust removal system and frequency conversion control method |
| CN116398458A (en) * | 2023-04-19 | 2023-07-07 | 东莞市东曦自动化科技有限公司 | Intelligent automatic control system and method for dust removal variable frequency fan in industrial field, electronic equipment and storage medium |
| CN116398458B (en) * | 2023-04-19 | 2024-04-05 | 东莞市东曦自动化科技有限公司 | Intelligent automatic control system and method for dust removal variable frequency fan in industrial field, electronic equipment and storage medium |
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