CN202355951U - Impulse blowing and ash removing control system of large-scale bag type dust collector - Google Patents
Impulse blowing and ash removing control system of large-scale bag type dust collector Download PDFInfo
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- CN202355951U CN202355951U CN201120347450XU CN201120347450U CN202355951U CN 202355951 U CN202355951 U CN 202355951U CN 201120347450X U CN201120347450X U CN 201120347450XU CN 201120347450 U CN201120347450 U CN 201120347450U CN 202355951 U CN202355951 U CN 202355951U
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Abstract
The utility model provides an impulse blowing and ash removing control system of a large-scale bag type dust collector and a method thereof. An upper box body and a blowing device are provided with impulse valves and air stop valves. The air stop valves are mounted above a filter bag, and a middle box body is located under the outlet of the filter bag. The air stop valves are connected with air stop valve relays. The system can realize automatic ash removing and standby bunker-jump ash removing of the dust collector system, ensures the intelligentization and rationalization of ash removing process, and can be switched into various overhaul modes.
Description
Technical field
The utility model belongs to pulse bag type dust collector system control field, the Intelligent Control Strategy of particularly large-scale bag dust-collector pulse jetting cleaning system.
Background technology
Along with the urgent requirement of sustainable development and improving constantly of people's environmental consciousness; Iron and steel enterprise has strengthened the dynamics of investment to environmental protection facility gradually; Large-scale pulse blowing bag type dust precipitator is in dust heavily contaminated zone extensive uses such as the burnt groove of Blast Furnace Ore, cast houses, and it is being born be the mission critical that blast furnace original fuel supply system, feeding system, cast house system carry out the dust processing.The pulse jetting deashing system is the core of sack cleaner, and its control strategy is directly determining deduster reliability of operation and economy.
The operation principle of sack cleaner is: after ash-laden gas gets into each the bin ash bucket in the sack cleaner; Under the guiding of ash bucket flow guide system; Directly fall into ash bucket after big dust particle separates, casing filtering area during all the other dust get into air-flow, grit by detention on the filter bag outer surface; Purified gas by in the bag after Venturi tube gets into the top inlet box, discharge through lift valve, exhaust duct.When filter bag surface area dust reaches a certain amount of; Pulse jet system in the sack cleaner closes lift valve one by one; To the lift valve of closing the electromagnetic impulse valve in the corresponding casing jet successively, compressed air pours in filter bag through nozzle, thereby makes the filter bag radial deformation shake off the dust on the filter bag; Fall into the dust of ash bucket, discharge by unloading ash-transmission system.
Large-scale sack cleaner dust-removing box is many; Have up to a hundred pulse valves and dozens of lift valve; Because PLC (programmable logic controller (PLC)) itself does not have enough I/O (I/O) mouthful each actuating equipment is carried out point-to-point control, the pulse valve control mode of matrix form one-to-many is a kind of electric controling mode that generally adopts.Based on the sort circuit pattern; There is following problem in current large-scale sack-duster pulse deashing control strategy: one, be controlled to be the control of timing controlled or level pressure difference automatically; Just realize the simple cycle of deashing process; That is: all casings are participated in dedusting work, successively carry out deashing work from first casing to a last casing according to timing or level pressure difference principle, and deashing is accomplished and got into next cycle; This control mode can't embody that large-scale deduster casing is many, and marginal capacity is strong, supports advantages such as on-bne repair; Two, not possessing concentrated maintenance pattern or concentrated maintenance function and automatic ash removing process switches unreasonable; Three, dedusting fan and the chain defective tightness of deduster coherent signal lack the protection to the deduster body.
Therefore, a kind of Intelligent Control Strategy of the pulse jetting deashing system based on novel expanded circuit is arisen at the historic moment.
Summary of the invention
The utility model technical problem to be solved is: provide a kind of large-scale bag dust-collector pulse jetting cleaning to control system; The utility model can be realized the automatic ash removing of dust pelletizing system, subsequent use jumping storehouse deashing; Guarantee the intelligent and rationalization of deashing process, can switch various maintenance patterns.
Large-scale bag dust-collector pulse jetting cleaning is controlled system; Be provided with pulse valve and blowing-out valve in upper box and the blowing device, the blowing-out valve is positioned at the filter bag top, and the outlet of filter bag below is provided with middle casing; The blowing-out valve is connected to the blowing-out valve relay, and pulse valve is connected to the novel matrix control circuit.
Described control system; It also comprises the control power supply and jumps the storehouse relay; The negative pole of pulse valve with jump storehouse relay normally-closed contact, blowing-out valve relay normally opened contact is connected to control power supply low-voltage port after connecting successively, the positive pole of pulse valve be connected to the high voltage port of controlling power supply after the pulse valve relay normally open contact is connected.
Described control system, the voltage of control power supply low-voltage port is 0V, the voltage of its high voltage port is 24V.
The advantage of the utility model: we can realize the blowing-out valve of a certain casing and the action of pulse valve through connecting blowing-out valve relay and pulse valve relay; Realize a certain casing blowing-out through connecting the blowing-out valve relay with disconnection jumping storehouse relay; And its pulse valve can not move, thus the function of the subsequent use casing that jumps when realizing automatic ash removing.
The utility model can be realized the automatic ash removing of dust pelletizing system, subsequent use jumping storehouse deashing, guarantees the intelligent and rationalization of deashing process; Realize perfect concentrated maintenance function, guarantee the reasonable switching of various operations and maintenance pattern; Realization is rationally chain to deduster and blower fan, guarantees that deduster is operated in safe condition.
Description of drawings
Fig. 1 is a novel matrix circuit diagram in the utility model.
Fig. 2 is that storehouse control circuit figure is jumped in blowing-out in the utility model.
Fig. 3 is pulse valve control circuit figure in the utility model.
Fig. 4, Fig. 5 are bag-type dusting soot cleaning system figure in the utility model.
Among the figure, 1: pulse valve, 11 of each casings; 2: blowing-out valve relay, 11 of each casings; 3: jump the storehouse relay, 1 of each casing; 4: pulse valve relay, 1 of each casing; 5: upper box and blowing device; 6: middle casing; 7: the blowing-out valve; 8: filter bag.
The specific embodiment
Deficiency to existing matrix control circuit and deashing control strategy; The utility model is that large-scale sack-duster pulse blowing system designs a kind of novel matrix expanded circuit; And the Intelligent Control Strategy of the injection system of combining closely with it is provided; Realize automatic ash removing, the subsequent use jumping storehouse deashing of dust pelletizing system, guarantee the intelligent and rationalization of deashing process; Realize perfect concentrated maintenance function, guarantee the reasonable switching of various operations and maintenance pattern; Realization is rationally chain to deduster and blower fan, guarantees that deduster is operated in safe condition.
The scheme that the utility model adopted is: build the novel matrix expanded circuit, and a kind of pulse jetting deashing control strategy that has automatic ash removing, subsequent use jumping storehouse deashing, concentrates the maintenance function of corresponding research and development.For a useful m casing (blowing-out valve), each casing the large-scale sack cleaner of n pulse valve is arranged, the relay output of definition three parts in the master control cabinet.At first, define corresponding m the blowing-out valve of m output point, define corresponding m of m output point and jump the storehouse relay, define n the corresponding m*n of a some pulse valve, matrix control circuit is as shown in Figure 1.
Large-scale bag dust-collector pulse jetting cleaning control method comprises full-automatic deashing control model, concentrates maintenance control model and the chain control model of deduster ontological security; Full-automatic deashing control model is used for the control of sack cleaner deashing and the subsequent use maintenance process of dirt pocket; Concentrate the maintenance control model to be used for control, the emergent control when the chain control model of deduster ontological security is used for said injection system and breaks down to specifying dirt pocket to concentrate maintenance process; Said jetting deashing system is in full-automatic deashing control model after opening usually; The interrupt condition of concentrating the maintenance control model is by artificial setting; The interrupt condition of the chain control model of deduster ontological security is that catastrophe failure appears in system, concentrates the interrupt priority level of maintenance control model and the chain control model of deduster ontological security to be higher than full-automatic deashing control model.
Described method, full-automatic deashing control model comprise regularly and hinder two kinds of deashing patterns surely that its step comprises:
S11) when timing to or pressure difference when reaching setting value, said jetting deashing system deashing begins;
S12) judge whether current dirt pocket is in subsequent use inspecting state, if, break off and jump storehouse relay normally-closed contact, close the blowing-out valve, skip this dirt pocket, get into next dirt pocket and carry out deashing process; If not, directly get into deashing process, the lift valve relay of the current dirt pocket that closes earlier, closed normally-closed contact of jumping the storehouse relay, lift valve are closed to put in place and are laggardly gone into next step;
S13) the pulse valve relay on the deduster bin is closed one by one, the corresponding pulses valve begins action, opens the lift valve relay of current dirt pocket when treating last pulse valve release, and lift valve is opened to put in place and laggardly gone into next step;
S14) get into next deduster and carry out deashing, turn back to step S12; If all dirt pockets have all been accomplished deashing work, wait for the next deashing commencing signal that satisfies regularly or hinder the deashing condition surely, after obtaining signal, be back to step S11.
Described method, the pressure differential resetting value of step S11 is 1.20MPa; The lift valve relay that the subsequent use inspecting state Rule of judgment of step S12 is current dirt pocket closes, and the jumping storehouse relay normally-closed contact of current dirt pocket breaks off; Each pulse valve T actuation time of step S13
1Be 0.1s, two pulse valve action T blanking time
2Be 5～10s, also wait for T when treating last pulse valve release
2Time is opened the lift valve relay of current dirt pocket again.
Described method, concentrate the concrete steps of maintenance pattern to comprise:
S21) specify every separated fixed time of any pulse valve of any dirt pocket once to jet at the host computer picture;
S22) the jetting deashing system that operates in full-automatic deashing control model is sent interrupt signal, the concentrated maintenance pattern of said jetting deashing system's entering;
S23) to ongoing timing deashing or hinder deashing process surely and unconditionally interrupt, close and specify the lift valve relay of dirt pocket, close corresponding lift valve, closed normally-closed contact of specifying the jumping storehouse relay of dirt pocket;
S24) pulse valve to appointment in this dirt pocket carries out the periodic breaks winding-up, accomplishes overhaul of the equipments and debugging;
S25) switch to full-automatic deashing control model by concentrated maintenance pattern.
Described method among the step S25, when switching to regularly the deashing pattern by concentrated maintenance pattern, at first compares current time T
4With last dirt pocket deashing deadline T
3Time difference whether satisfied regularly deashing condition, if satisfy the deashing that then gets started one-period, get into step S11; If do not satisfy, then continue to wait for the deashing that after the timing condition satisfies, begins one-period.
Described method among the step S25, is switched to when deciding the resistance pattern by concentrated maintenance pattern, at first measures current differential pressure, when pressure reduction has satisfied the deashing that then gets started one-period when hindering the deashing condition surely, gets into step S11; If do not satisfy then continue to wait for the deashing that after the pressure reduction condition satisfies, begins one-period.
Described method; Because of the method that catastrophe failure gets into the chain control model of deduster ontological security appears in system be: it is very few that said jetting deashing system is in the blowing-out valve number that reaches a state; The deashing pressure of certain dirt pocket is less than minimum threshold; Or the pressure differential of said jetting deashing system unconditionally stops blower fan greater than max-thresholds; When certain blowing-out valve state and order are not inconsistent, the pressure differential of certain dirt pocket is outside threshold value the time, or the pressure differential of said jetting deashing system is greater than the last alarm that gives in limited time.
Described method, when being in the blowing-out valve number that reaches a state and being less than 20, the pressure differential of certain dirt pocket is less than 0.1MPa, or the pressure differential of said jetting deashing system unconditionally stops blower fan during greater than 2.2MPa; When the state and the order of certain blowing-out valve is not inconsistent, the pressure differential of certain dirt pocket is outside 0.3MPa～0.5MPa, or the pressure differential of said jetting deashing system gives alarm during greater than 1.8MPa.
Described method when being in full-automatic deashing control model, switching to the method for deciding the resistance pattern by timing mode and does, the current deashing process that carries out continues, and after waiting to arrive step S14 this cycle deashing and finishing, begins to get into and decides resistance pattern deashing, changes step S11 over to; By deciding the method that the resistance pattern switches to timing mode do, the current deashing that carries out continues, and after waiting to arrive step S14 this cycle deashing and finishing, begins to get into the timing mode deashing, changes step S11 over to.
Specifically describe through specific embodiment below in conjunction with accompanying drawing, but do not do the foundation of any restriction as the utility model.
In casing 1; The negative pole COM1 of all pulse valves 1 and blowing-out valve relay 2 normally opened contacts and jump and be connected to the 0V that controls power supply after storehouse relay 3 normally-closed contacts connects; The anodal MC of pulse valve 1 and the 4 normally opened contact series connections of pulse valve relay are to the 24V that controls power supply, the anodal MC1～MC11 of 11 pulse valves 1 respectively with the normally opened contact series connection of 1MC-KA～11MC-KA (promptly 1～11 feeling the pulse) towards valve relay to the 24V that controls power supply.Be provided with pulse valve 1 and blowing-out valve 7 in upper box and the blowing device 5, blowing-out valve 7 is positioned at filter bag 8 tops, casing 6 during the outlet of filter bag 8 belows is provided with.Blowing-out valve relay 2 is connected to blowing-out valve 7.
In 2～No. 28 casings, the mode of connection of pulse valve and blowing-out valve is identical with casing 1.
The embodiment of the utility model: the pulse bag type dust collector of the utility model has 28 blowing-out valves and 28 dedusting bins; Each bin has 11 magnetic valves; Its winding-up circuit is shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3; The introducing of jumping the storehouse relay is circuit core of the utility model and the foundation stone that soot cleaning system is jumped the storehouse theory; Both continued to use the control mode of the one-to-many of original matrix circuit, and made the blowing-out valve in subsequent use storehouse again in blowing-out, and can not cause the pulse valve synchronization action in the subsequent use casing because of the action of other casing pulse valves.For example: feeling the pulse when No. 1 blowing-out valve, 1 gets when electric towards the valve relay coil, and then the blowing-out valve of No. 1 dirt pocket cuts out, and No. 1 pulse valve of No. 1 deduster is opened.When No. 1 and No. 2 blowing-out valves, jump storehouse relay, 3 for No. 2 and feel the pulse and get when electric towards the valve relay coil, then No. 2 dirt pockets are in subsequent use inspecting state, its pulse valve is failure to actuate, its blowing-out valve cuts out; The blowing-out valve of No. 1 dirt pocket cuts out, and No. 3 pulse valves of No. 1 dirt pocket are opened.Blower fan is then irrelevant with deduster, and the control system of oneself is arranged separately.Below in conjunction with the circuit in the accompanying drawing 1, introduce the Intelligent Control Strategy of injection system in detail.
(1) the jumping storehouse strategy in the full-automatic deashing process:
Automatically control employing pressure reduction (fixed resistance) and regularly two kinds of control modes, two kinds of control modes also can be changed automatically.When timing to or pressure difference when reaching setting value (like 1.20MPa), the sack cleaner deashing begins.At first; Judge No. 1 dirt pocket whether to be in subsequent use inspecting state (when being in stand-by state, the blowing-out valve relay normally opened contact of No. 1 deduster bin is closed, jumps storehouse relay normally-closed contact and breaks off for No. 1; After the blowing-out valve that has guaranteed No. 1 dirt pocket of subsequent use maintenance like this cuts out; Not having pulse valve moves along with the action of other dirt pocket pulse valves), if directly get into No. 2 deduster bins and judge whether to carry out deashing work; If not; Close the blowing-out valve of No. 1 dirt pocket, then the pulse valve on No. 1 deduster bin begins action one by one, and pulse valve actuation time is T1=0.1 second (adjustable); Be T2=5～10 second (adjustable) blanking time of pulse valve action; Treat the 11st pulse valve release time-delay T2 time, open the blowing-out valve, get into No. 2 bins and carry out deashing.Then, judge whether No. 2 dirt pockets are in subsequent use inspecting state, repeat the deashing and the deterministic process of No. 1 deduster bin, until the deashing work of accomplishing No. 28 dirt pockets.After treating that storehouse deashing completion is accomplished or jumped to No. 28 dirt pocket deashing, this cycle, ashman accomplished, and waited for automatic control state next but one deashing commencing signal.
(2) concentrate the maintenance pattern and with the intelligent switching control strategy of automatic ash removing process:
Concentrate the maintenance pattern, that is: specify every separated fixed time of any pulse valve of any bin once to jet at the host computer picture, make things convenient for the maintenance debugging of paired pulses valve.Concentrating needs between maintenance pattern and the automatic ash removing pattern rationally to switch, and maintenance pattern rank has high interrupt function.When soot cleaning system gets into the maintenance pattern; Then ongoing timing deashing and hinder deashing process surely and unconditionally interrupt; System will close the blowing-out valve of specifying bin, and the pulse valve of specifying appointment in the bin is carried out the periodic breaks winding-up, accomplish overhaul of the equipments and debugging; When switching to regularly the deashing pattern by the maintenance pattern; Current time T4 and T3 (timing deashing or hinder surely under the deashing pattern relatively; Last No. 28 deduster deashing or to jump the time that the storehouse deashing accomplishes be T3) time difference whether satisfied regularly deashing condition; If satisfy the deashing then get started one-period,, then continue to wait for to the deashing that begins one-period after the timing condition satisfies if do not satisfy; When switching to by the maintenance pattern when deciding the resistance pattern, whether begin the deashing work of one-period according to the pressure reduction conditional decision; When being switched to by timing mode when deciding the resistance pattern, the current deashing that carries out continues, treat that this cycle deashing finishes after, begin to get into and decide resistance pattern deashing; When deciding the resistance pattern when switching to timing mode, the current deashing that carries out continues, be with this cycle deashing to finish after, begin to get into the timing mode deashing.
(3) the chain control strategy of deduster ontological security:
In order to guarantee that deduster is operated in safe condition; Guarantee the dust removing effects and the service life of deduster; Under following situation, need stop blower fan: if cause deduster to be in to reach the blowing-out valve number of a state very few because of reasons such as blowing-out valve source of the gas interruptions; Will produce huge negative pressure and damage deduster, the number that reaches the position when blowing-out valve number is during less than 20, unconditional blowing-out machine; When the deduster deashing is lower than 0.1MPa, i.e. deduster normally during jetting deashing, blowing-out machine; When deduster pressure reduction greater than 2.2MPa, the blowing-out machine; In addition, when following situation takes place, need give alarm: when blowing-out valve state and order are not inconsistent, deashing pressure is higher than 0.5MPa or is lower than 0.30Mpa, and deduster pressure reduction is during greater than 1.8MPa.
To sum up; Large-scale sack-duster pulse blowing system intelligence control strategy; Novel matrix control circuit based on a kind of injection system; Realize subsequent use jumping storehouse function and the online subsequent use maintenance of dirt pocket of the automatic ash removing process of soot cleaning system, guaranteed that the intelligence of the multiple mode of operation of system is switched, guaranteed automatic ash removing rationality of procedure, intelligent and versatility under the situation such as any dirt pocket of deduster need overhaul.
Claims (3)
1. large-scale bag dust-collector pulse jetting cleaning is controlled system; It is characterized in that: be provided with pulse valve and blowing-out valve in upper box and the blowing device, the blowing-out valve is positioned at the filter bag top, and the outlet of filter bag below is provided with middle casing; The blowing-out valve is connected to the blowing-out valve relay, and pulse valve is connected to the novel matrix control circuit.
2. control according to claim 1 system; It is characterized in that: it also comprises the control power supply and jumps the storehouse relay; The negative pole of pulse valve with jump storehouse relay normally-closed contact, blowing-out valve relay normally opened contact is connected to control power supply low-voltage port after connecting successively, the positive pole of pulse valve be connected to the high voltage port of controlling power supply after the pulse valve relay normally open contact is connected.
3. control according to claim 2 system is characterized in that: the voltage of control power supply low-voltage port is 0V, and the voltage of its high voltage port is 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120347450XU CN202355951U (en) | 2011-09-16 | 2011-09-16 | Impulse blowing and ash removing control system of large-scale bag type dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120347450XU CN202355951U (en) | 2011-09-16 | 2011-09-16 | Impulse blowing and ash removing control system of large-scale bag type dust collector |
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| Publication Number | Publication Date |
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| CN202355951U true CN202355951U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120347450XU Expired - Fee Related CN202355951U (en) | 2011-09-16 | 2011-09-16 | Impulse blowing and ash removing control system of large-scale bag type dust collector |
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| CN (1) | CN202355951U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688530A (en) * | 2014-11-28 | 2016-06-22 | 上海袋式除尘配件有限公司 | A multi-pressure-difference control method for a bag type dust collector |
-
2011
- 2011-09-16 CN CN201120347450XU patent/CN202355951U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688530A (en) * | 2014-11-28 | 2016-06-22 | 上海袋式除尘配件有限公司 | A multi-pressure-difference control method for a bag type dust collector |
| CN105688530B (en) * | 2014-11-28 | 2017-11-28 | 上海袋式除尘配件有限公司 | A kind of more Differential pressure control methods of sack cleaner |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20130916 |