CN105688530B - A kind of more Differential pressure control methods of sack cleaner - Google Patents
A kind of more Differential pressure control methods of sack cleaner Download PDFInfo
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- CN105688530B CN105688530B CN201410708144.2A CN201410708144A CN105688530B CN 105688530 B CN105688530 B CN 105688530B CN 201410708144 A CN201410708144 A CN 201410708144A CN 105688530 B CN105688530 B CN 105688530B
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Abstract
The present invention relates to a kind of more Differential pressure control methods of sack cleaner, including step S1：Set N number of pressure difference higher limit PHn, pressure difference lower limit PL, and with each pressure difference higher limit PHnCorresponding running parameter, wherein, 2≤n≤N, PL ＜ PHn＜ PHn+1；Step S2：Circular wait dedusting, and detect the pressure difference P of lower box on deduster；Step S3：When pressure difference P is more than or equal to some pressure difference higher limit PHnWhen, Q electromagnetic impulse valve of control carries out pneumatic cycle ash removal under corresponding running parameter, until pressure difference P is less than or equal to pressure difference lower limit PL, jump procedure S2.Compared with prior art, the present invention can adjust the running parameter of pressure difference deashing according to the situation of change of live pressure drag, increase the intensity of deashing, ensure that sack cleaner reaches dust removing effects.
Description
Technical field
The present invention relates to sack cleaner system control field, is controlled more particularly, to a kind of more pressure differences of sack cleaner
Method.
Background technology
The pressure difference dust-removing control mode of sack cleaner refers to：According to the resistances of filter bag both sides (lower box i.e. on deduster
Pressure difference) judge whether to deashing, according to the pressure difference higher limit of setting and pressure difference lower limit, (pressure difference higher limit is more than pressure
Poor lower limit), after increasing by the dust of filter bag, pressure difference is stepped up to the pressure difference upper limit, carries out intensive concentration deashing,
Stop deashing after pressure difference is less than lower limit and enter wait state.
Existing sack cleaner is in many onsite applications, due to the uncertainty of operating mode, such as certain period Dust Capacity
Increase severely, filter bag both sides pressure drag can not be reduced in set pressure difference deashing time parameter conditional operation, therefore cause dedusting
Even if device is working always, the collateral resistance of filter bag two does not also reduce, and very increases all the better so that whole deduster is not reaching to should
Some removing dust and clearing ash effects, meanwhile, filter bag also results in the damage of filter bag in both sides high-drag state for a long time.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of sack cleaner
More Differential pressure control methods, the parameter of pressure difference deashing can be adjusted according to the situation of change of live pressure drag, increases the strong of deashing
Degree, ensures that sack cleaner reaches dust removing effects.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of more Differential pressure control methods of sack cleaner, comprise the following steps：
Step S1：Set N number of pressure difference higher limit PHn, pressure difference lower limit PL, and with each pressure difference higher limit PHnIt is corresponding
Running parameter, wherein, 2≤n≤N, PL ＜ PHn＜ PHn+1；
Step S2：Circular wait dedusting, and detect the pressure difference P of lower box on deduster；
Step S3：When pressure difference P is more than or equal to some different pressure difference higher limit PHnWhen, Q electromagnetic impulse valve of control exists
Pneumatic cycle ash removal is carried out under corresponding running parameter, until pressure difference P is less than or equal to pressure difference lower limit PL, jump procedure S2.
The step S3 is specially：
301：By pressure difference P and N number of pressure difference higher limit PHnContrast successively from low to high, set n as 1, when pressure difference P is big
In equal to pressure difference higher limit PHn, perform step 302；
302：Control Q electromagnetic impulse valve with PHnOne cycle deashing is carried out under corresponding running parameter, performs step
303；
303：Judge whether pressure difference P is less than or equal to pressure difference lower limit PL, if so, jump procedure S2, if it is not, judgingnIt is
It is no to be equal to N, if so, jump procedure 302, if it is not, performing step 304；
304：Judge whether pressure difference P is less than pressure difference higher limit staten+1, if so, jump procedure 302, if it is not, n=n+1 is made,
Jump procedure 302.
The pneumatic cycle ash removal is that Q electromagnetic impulse valve opens deashing under corresponding running parameter in turn successively.
The running parameter includes and pressure difference higher limit PHnCorresponding pulse width Tn1With pulse spacing Tn2, the pulse
Width Tn1The time of deashing, the pulse spacing T are opened for electromagnetic impulse valven2Open deashing successively between electromagnetic impulse valve
Interval time, wherein, Tn1＜ T(n+1)1, Tn2＞ T(n+1)2。
The Tn1Span meet 30ms≤Tn1≤300ms。
The Tn2Span meet 1s≤Tn2≤600s。
The PHnSpan meet 1000Pa≤PHn≤6000Pa。
Compared with prior art, the present invention is directed to a kind of multiple pressure of control proposition of multiple electromagnetic impulse valves in sack cleaner
Difference control method, when being more than or equal to different pressure difference higher limits according to current differential pressure value, just according to the value corresponding to work
Parameter carries out the different pressure difference deashing work of intensity, therefore the present invention has advantages below：
1) dust removal process automates, good dedusting effect：The inventive method overcomes traditional deduster can only be in single dedusting
The defects of dedusting is carried out under intensity, the adjust automatically of deashing intensity can be carried out according to the operating mode situation of scene at different moments, is reached
To normal dust removing effects；
2) extend life of bag filter, reduce dedusting cost：The inventive method is controlled using more pressure differences so that adjustment deashing
Speed, it is larger than dust and advances the speed, pressure difference declines, and avoids filter bag from causing to filter in both sides high-drag state for a long time
The situation of the damage of bag.
Brief description of the drawings
Fig. 1 is the structural representation of sack cleaner；
Fig. 2 is the more Differential pressure control method flow charts of the present invention；
Fig. 3 is more Differential pressure control method flow charts in the embodiment of the present invention.
In figure：1st, pulse control instrument, 2, gas bag, 3, differential pressure ports, 4, electromagnetic impulse valve, 5, injection tube, 6, filter bag.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment one：
As shown in figure 1, sack cleaner includes casing, pulse control instrument 1, gas bag 2, differential pressure transmitter, electromagnetic impulse valve
4th, injection tube 5 and filter bag 6, differential pressure transmitter are surveyed and outer at the differential pressure ports 3 of lower box on deduster in detection filter bag 6
The pressure differential of side, interior outside pressure difference increase with the increase of the Dust Capacity adhered on filter bag 6, and pulse control instrument 1 receives difference
The pressure difference of pressure transmitter transmission, and control electromagnetic impulse valve 4 is connected, electromagnetic impulse valve 4 is located between gas bag 2 and injection tube 5,
Filter bag 6 of the compressed air from injection tube 5 into casing in control gas bag 2 carries out jetting deashing, and the dust in the outside of filter bag 6 is blown down
Ash bucket is fallen into so as to complete dedusting.
As shown in Fig. 2 a kind of more Differential pressure control methods of sack cleaner are used for pulse control instrument 1 to electromagnetic impulse valve 4
Control, realize efficient jetting deashing, this method comprises the following steps：
Step S1：Set N number of pressure difference higher limit PHn, pressure difference lower limit PL, and with each pressure difference higher limit PHnIt is corresponding
Running parameter, wherein, 2≤n≤N, PL ＜ PHn＜ PHn+1, PHnSpan meet 1000Pa≤PHn≤6000Pa。
Running parameter includes and pressure difference higher limit PHnCorresponding pulse width Tn1With pulse spacing Tn2, pulse width Tn1For
Electromagnetic impulse valve 4 opens the time of deashing, pulse spacing Tn2Open the interval time of deashing successively between electromagnetic impulse valve 4.
Usual pulse width increase, deashing intensity are improved, and the pulse spacing is reduced, and deashing intensity improves, so Tn1＜ T(n+1)1, Tn2＞
T(n+1)2, then T(n+1)1、T(n+1)2Under the conditions of ash-removal effect be more than Tn1、Tn2Under the conditions of ash-removal effect, Tn2Numerical value set also with
The tonifying Qi speed of gas bag 2 is relevant.Wherein, Tn1Span meet 30ms≤Tn1≤ 300ms, Tn2Span meet 1s
≤Tn2≤600s。
Step S2：Circular wait dedusting, and the pressure difference P of lower box on deduster is detected in real time.
Step S3：When pressure difference P is more than or equal to some pressure difference higher limit PHnWhen, Q electromagnetic impulse valve 4 of control is corresponding
Running parameter under carry out pneumatic cycle ash removal, until pressure difference P is less than or equal to pressure difference lower limit PL, jump procedure S2, pneumatic cycle ash removal
Deashing is opened for Q electromagnetic impulse valve 4 under corresponding running parameter in turn successively.
A certain a total of five electromagnetic impulse valves 4 of sack cleaner, can be to the pocket type based on above-mentioned more Differential pressure control methods
Deduster carries out following parameter setting：
PL is set as 800Pa, N=3；
PH1It is set as 1500Pa, T11For 100ms, T12For 20s；
PH2It is set as 2000Pa, T21For 150ms, T22For 18s；
PH3It is set as 3000Pa, T31For 200ms, T32For 15s.
As shown in figure 3, the course of work of the sack cleaner is：
A：Electric-opening in the control system of pulse control instrument 1, into step B；
B：Circular wait state, P accumulates with dust to be stepped up, as P >=PH1, into step C1；
C1：Stand-by period T12, No. 1 electromagnetic impulse valve startup time T11, stand-by period T12, when No. 2 electromagnetic impulse valves start
Between T11, after repeating five electromagnetic impulse valves 4, one cycle deashing is realized, into step C2；
C2：If P≤PL, jump procedure B, if PL ＜ P ＜ PH2, jump procedure C1, if P >=PH2, into step D1；
D1：Stand-by period T22, No. 1 electromagnetic impulse valve startup time T21, stand-by period T22, when No. 2 electromagnetic impulse valves start
Between T21, after repeating five electromagnetic impulse valves 4, one cycle deashing is realized, into step D2；
D2：If P≤PL, into step B, if PL ＜ P ＜ PH3, jump procedure D1, if P >=PH3, into step E1, because
The pressure difference higher limit of this embodiment is set as 3, so step E1 is directly entered herein, if pressure difference higher limit more than three,
The corresponding judgment step in Fig. 3 in dotted line frame can be entered, i.e. whether P is more than or equal to PHnWhen judgement；
E1：Stand-by period T32, No. 1 electromagnetic impulse valve startup time T31, stand-by period T32, when No. 2 electromagnetic impulse valves start
Between T31, after repeating five electromagnetic impulse valves 4, one cycle deashing is realized, into step E2；
E2：If P≤PL, into step B, wait is continued cycling through；If P ＞ PL, jump procedure E1.
Therefore, under normal circumstances due to dust concentration relatively under, the both sides pressure difference increase of filter bag 6 is slower, in PH1State just can be just
Pressure difference is reduced to PL usually through deashing.If certain moment, because all streamlines all go into operation, dust concentration increases severely, increase speed
Rate is about 450Pa/100s, PH1Each pressure difference deashing cycle down low rate is about 300Pa/100s, PH under Parameter Conditions2Parameter
Under the conditions of be 400Pa/100s, PH3It is 500Pa/100s under Parameter Conditions, then pressure difference can be raised constantly when working, by PH1
Deashing, PH2Deashing, particular up to PH3Under Parameter Conditions, now, deashing speed is advanced the speed more than dust, the pressure difference of deduster
Value could slowly be reduced to PL, realize the effect of deashing.
Embodiment two：
A certain sack cleaner structural principle is with embodiment one, altogether provided with ten electromagnetic impulse valves 4, based on above-mentioned more pressure differences
Control method, following parameter setting can be carried out to the sack cleaner：
PL is set as 800Pa, N=5；
PH1It is set as 1500Pa, T11For 100ms, T12For 300s；
PH2It is set as 2000Pa, T21For 120ms, T22For 250s；
PH3It is set as 3000Pa, T31For 150ms, T32For 200s；
PH4It is set as 4000Pa, T41For 200ms, T42For 150s；
PH5It is set as 5000Pa, T51For 250ms, T52For 100s.
The course of work of the sack cleaner compared to embodiment one as shown in figure 3, increase to PH4、PH5Two pressure difference upper limits
The judgment step of value.Under normal circumstances due to dust concentration relatively under, the both sides pressure difference increase of filter bag 6 is slower, in PH1State just can be just
Pressure difference is reduced to PL usually through deashing.Certain moment, dust concentration increased severely, and advances the speed because all streamlines all go into operation
About 360Pa/300s.
PH1Each pressure difference deashing cycle down low rate is about 150Pa/300s, PH under Parameter Conditions2It is under Parameter Conditions
230Pa/300s, PH3It is 280Pa/300s, PH under Parameter Conditions4It is 340Pa/300s, PH under Parameter Conditions5It is under Parameter Conditions
400Pa/300s, then pressure difference can be raised constantly when working, by PH1Deashing, PH2Deashing ... is particular up to PH5Parameter Conditions
Under, deashing speed is advanced the speed more than dust, and the pressure difference of deduster could slowly be reduced to PL, realize the effect of deashing.
Presently preferred embodiments of the present invention is the foregoing is only, some Parameters variations can be according to the design of each sack cleaner
Scheme and the operating mode situation used have certain change, are not intended to limit the scope of the present invention.
Claims (5)
1. more Differential pressure control methods of a kind of sack cleaner, it is characterised in that comprise the following steps：
Step S1：Set N number of pressure difference higher limit PHn, pressure difference lower limit PL, and with each pressure difference higher limit PHnCorresponding work
Make parameter, wherein, 2≤n≤N, PL ＜ PHn＜ PHn+1；
Step S2：Circular wait dedusting, and detect the pressure difference P of lower box on deduster；
Step S3：When pressure difference P is more than or equal to some pressure difference higher limit PHnWhen, Q electromagnetic impulse valve of control is in corresponding work
Pneumatic cycle ash removal is carried out under parameter, until pressure difference P is less than or equal to pressure difference lower limit PL, jump procedure S2, the step S3 is specific
For：
301：By pressure difference P and N number of pressure difference higher limit PHnContrast successively from low to high, set n as 1, when pressure difference P is more than or equal to
Pressure difference higher limit PHn, perform step 302；
302：Control Q electromagnetic impulse valve with PHnOne cycle deashing is carried out under corresponding running parameter, performs step 303,
The running parameter includes and pressure difference higher limit PHnCorresponding pulse width Tn1With pulse spacing Tn2, the pulse width Tn1For
Electromagnetic impulse valve opens the time of deashing, the pulse spacing Tn2When opening the interval of deashing successively between electromagnetic impulse valve
Between, wherein, Tn1＜ T(n+1)1, Tn2＞ T(n+1)2；
303：Judge whether pressure difference P is less than or equal to pressure difference lower limit PL, if so, jump procedure S2, if it is not, judge n whether etc.
In N, if so, jump procedure 302, if it is not, performing step 304；
304：Judge whether pressure difference P is less than pressure difference higher limit PHn+1, if so, jump procedure 302, if it is not, making n=n+1, is redirected
Step 302.
A kind of 2. more Differential pressure control methods of sack cleaner according to claim 1, it is characterised in that the circulation cleaning
Ash opens deashing under corresponding running parameter in turn successively for Q electromagnetic impulse valve.
A kind of 3. more Differential pressure control methods of sack cleaner according to claim 1, it is characterised in that the Tn1Take
Value scope meets 30ms≤Tn1≤300ms。
A kind of 4. more Differential pressure control methods of sack cleaner according to claim 1, it is characterised in that the Tn2Take
Value scope meets 1s≤Tn2≤600s。
A kind of 5. more Differential pressure control methods of sack cleaner according to claim 1, it is characterised in that the PHnTake
Value scope meets 1000Pa≤PHn≤6000Pa。
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| CN201410708144.2A CN105688530B (en) | 2014-11-28 | 2014-11-28 | A kind of more Differential pressure control methods of sack cleaner |
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| CN201410708144.2A CN105688530B (en) | 2014-11-28 | 2014-11-28 | A kind of more Differential pressure control methods of sack cleaner |
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| CN105688530B true CN105688530B (en) | 2017-11-28 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107081018A (en) * | 2017-05-12 | 2017-08-22 | 合肥热电集团有限公司 | The small-sized pulsed jet cloth filter control technique of weight discharger formula |
| CN107617283B (en) * | 2017-10-09 | 2020-01-14 | 中钢集团天澄环保科技股份有限公司 | Dynamic pulse interval control system for ash removal of pulse bag type dust collector |
| CN107596815B (en) * | 2017-11-01 | 2019-10-29 | 福建龙净脱硫脱硝工程有限公司 | A kind of acquisition methods and system in the blowing period of sack cleaner |
| CN110585816A (en) * | 2019-09-27 | 2019-12-20 | 合肥中亚环保科技有限公司 | Intelligent ash removal control method of bag type dust collector |
| CN111346440B (en) * | 2020-03-31 | 2023-12-26 | 上海袋式除尘配件有限公司 | Intelligent electromagnetic pulse valve fault detection system and detection method thereof |
| CN111643989A (en) * | 2020-05-06 | 2020-09-11 | 徐州徐工环境技术有限公司 | Automatic pulse dust removal cleaning system and method based on pressure detection |
| CN112791526B (en) * | 2021-03-29 | 2021-09-24 | 亿昇(天津)科技有限公司 | Dust removal system and control method thereof |
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| JP3460991B2 (en) * | 2001-06-25 | 2003-10-27 | 川崎重工業株式会社 | Pulse cleaning method for multi-chamber bag filter |
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| GB2400444B (en) * | 2003-04-11 | 2006-08-30 | Ford Global Tech Llc | Pressure sensor diagnosis |
| CN101736108A (en) * | 2009-12-30 | 2010-06-16 | 中冶南方工程技术有限公司 | Group control method for blast furnace gas cloth bag dust removal system for ash conveying of silo pump |
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