CN102755806B - A kind of cleaner of parasitic type combination and operation method thereof - Google Patents
A kind of cleaner of parasitic type combination and operation method thereof Download PDFInfo
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- CN102755806B CN102755806B CN201210246078.2A CN201210246078A CN102755806B CN 102755806 B CN102755806 B CN 102755806B CN 201210246078 A CN201210246078 A CN 201210246078A CN 102755806 B CN102755806 B CN 102755806B
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Abstract
The invention discloses cleaner and the operation method thereof of the combination of a kind of parasitic type, the cleaner of described parasitic type combination comprises the electric cleaner with one or more electric field rooms, and the main exhaust duct of electric cleaner is provided with main air blower; Also comprise and the sack cleaner of electric cleaner parallel connection and the pipe network for being connected electric field room and sack cleaner, pipe network comprise the top being connected to electric field room one or more arm and respectively with the main induced duct of the inlet communication of arm and described sack cleaner; The outlet of sack cleaner is connected with cloth bag blower fan, and the outlet of cloth bag blower fan is connected with secondary exhaust duct, and secondary exhaust duct is connected with main exhaust duct, and before the junction of secondary exhaust duct and main exhaust duct is positioned at main air blower.The present invention only need extract a small amount of gas that top, electric field room comprises ultrafine dust out, and the volume of required sack cleaner is little, has short, the transformation of the resistance, the engineering time that do not increase electric cleaner and does not limit by place, the advantage of little impact on production.
Description
Technical field
The present invention relates to technical field of industrial dust removal, be specifically related to cleaner and the operation method thereof of the combination of a kind of parasitic type, the cleaner of described parasitic type combination comprises electric cleaner and sack cleaner, and on the basis of electric cleaner, sack cleaner in parallel forms.
Background technology
In dust removal field, the diameter of particle is divided into: 0 ~ 5 micron, 5 ~ 10 microns, 10 ~ 20 microns, 20 ~ 50 microns, be greater than several ranks such as 50 microns, wherein the particle of 0 ~ 5 micron is defined as ultrafine dust.Ultrafine dust does Brownian movement in atmosphere, has extremely strong diffusivity, in still air hardly sedimentation or slowly, sedimentation circuitously.
Electric cleaner and sack cleaner are two kinds of common equipments for reclaiming dust in industrial waste gas, are widely used in the fields such as electric power, smelting, cement.The operation principle of electric cleaner is: in a high-voltage electrostatic field heterogeneous, gas is ionized, and dusty gas by electric field, makes that dust is charged forms anion, and anion is under the effect of electric field force, and anode is moved.In the process that anion moves in anode, be divided into and accelerate and at the uniform velocity two stages, in corona zone, ion is constantly accelerated, because the anion quality of high-speed cruising is minimum, the resistance that anion is subject under damping state continues to increase, when acting on the power on anion and equaling the resistance be subject to, speed is constant, after anion motion arrives anode, electronics is neutralized formation electric current, and dust is caught by positive plate (i.e. dust collecting electrode), of a specified duration to its rapping, the dust of catching falls ash bucket along pole plate, reaches the object of gathering dust.
The operation principle of sack cleaner is: the cloth bag being furnished with skeleton in open container, blower fan is extracted into dusty gas the inner side of cloth bag from the outside of cloth bag, dust is filtered outside cloth bag, when dust on cloth bag runs up to certain thickness, reverse gas purging is carried out to it, the dust be filtered falls ash bucket, reaches the object of gathering dust.
These two kinds of cleaners respectively have pluses and minuses, and electric cleaner has that equipment running resistance is little, power consumption is little, the temperature of suitable treatment waste gas is high, flow is large, the advantage that efficiency of dust collection is high, maintenance cost is low; Its shortcoming is the poor effect that investment is large, reclaim ultrafine dust.
Sack cleaner has can process thickness dust, invest little, that efficiency of dust collection is high advantage, and its shortcoming is that equipment running resistance is large, and process EGT is lower, maintenance cost is high.
Three electric fields are provided with in the Large-sized Electrostatic Precipitator major part of the industry extensive use such as electric power, smelting, cement, chemical industry of China, dusty gas is successively through three grades of purifications of first, second, third electric field, abundant dedusting, the design discharge standard of the electric cleaner of three grades of electric fields is 50mg/Nm
3.It is better that existing electric cleaner ubiquity initial performance, and after date when running one section, efficiency of dust collection starts the problem of decline.Its analysis of causes is as follows: electric cleaner is in operation, and dust-laden exhaust gas constantly enters, and is spread by horn mouth, sudden change of flow speed, and meal dirt, by gravitational field separate and subside, is called first separation; Dust after separation is caught gathering by the first electric field, certain thickness to be run up to, and through rapping, the separated sedimentation of dust of moiety aggregation, is called secondary separation; Dust after secondary separation returns to electric field again, and enters second, third electric field separate and subside again successively, is called and is separated with four times for three times.Dust-laden exhaust gas endlessly, after multiple separation, ultrafine dust is still stayed in electric field, is repeatedly caught by electric field, and repeatedly returns to electric field, and concentration improves constantly.The feature of these ultrafine dusts: surface area greatly, very easily charged, diffusivity is strong, be with in electric field same sex electric charge, stability high, not free settling, not easily leave electric field.Electric field force carries out work done repeatedly to them, consumes normal power.They move to the second electric field from the first electric field under wind-force effect, then move to the 3rd electric field from the second electric field.Ultrafine dust is under the effect in temperature field simultaneously, and assemble to electric field top, if things go on like this, until saturated, efficiency of dust collection is declined, and discharge exceeds standard.In addition inventor finds in practice: when gas humidity is large, and dust-charge reduces, and ultrafine dust is condensed into flocculence, and flocculence dust hangs in electric field.Its feature is: top is obviously many than bottom, and the 3rd electric field is more than the second electric field, and the second electric field is more than the first electric field.When gas is dry, whether byssaceous dust can disappear, these ultrafine dusts, no matter condense, and is finally all discharged in atmosphere, contaminated environment.
The shortcoming of the electric cleaner of prior art is, ultrafine dust is easily caught by electric field again after rapping, the phenomenon that oriented upper space gathers in an electric field.Ultrafine dust is after multistage electric field, and the trend that concentration improves gradually, the ultrafine dust of long term accumulation can not be caught effectively by electrode, is finally discharged into air, contaminated environment.Existing Large-sized Electrostatic Precipitator major part is 50mg/Nm according to dust concentration
3discharge standard design, along with the socio-economic development of China, improve constantly the requirement of environment, discharge standard is from 50mg/Nm
3bring up to 30mg/Nm
3.Therefore the large-scale electric dust-removing equipment to having built up is needed to transform, the height that usual employing increases electric field quantity or increases electric field is to improve specific collection area, such reforming mode investment is huge, high to site requirements, later maintenance expense is large, and fundamentally can not solve the problem removing ultrafine dust.
Summary of the invention
In view of the foregoing defects the prior art has, the technical problem that the present invention will solve is, provides a kind of cleaner effectively can removing the ultrafine dust in dusty gas.
For solving the problem, the present invention adopts following technical scheme: a kind of cleaner of parasitic type combination, and comprise the electric cleaner with one or more electric field rooms, the main exhaust duct of described electric cleaner is provided with main air blower; The cleaner of described parasitic type combination also comprises and the sack cleaner of described electric cleaner parallel connection and the pipe network for the electric field room and sack cleaner that are connected described electric cleaner, described pipe network comprise the top being connected to described electric field room one or more arm and respectively with the main induced duct of the inlet communication of described arm and described sack cleaner; The outlet of described sack cleaner is connected with cloth bag blower fan, and the outlet of described cloth bag blower fan is connected with secondary exhaust duct, and described secondary exhaust duct is connected with described main exhaust duct, and before the junction of described secondary exhaust duct and described main exhaust duct is positioned at described main air blower.
As preferably, described sack cleaner is also connected with the bypass communicated with air, and described bypass is provided with the by-passing valve for regulating the gas temperature in described sack cleaner.
As preferably, described arm is provided with the first control valve, and described main induced duct is provided with the second control valve on the pipeline be connected with described sack cleaner.
As preferably, the cleaner of described parasitic type combination also comprises controller, in described sack cleaner or main induced duct be provided with temperature sensor, described controller controls opening or closing of described by-passing valve according to the signal of described temperature sensor.
As preferably, the top of described electric field room is provided with dust concentration sensor, and described dust concentration sensor is connected with described controller, and described controller controls the opening and closing of described second control valve and cloth bag blower fan according to the signal of described dust concentration sensor.
As preferably, described sack cleaner comprises at least one or more dirt pocket, the import of each described dirt pocket is provided with off-line valve, be equipped with pressure sensor in each described dirt pocket, described controller is connected with pressure sensor and controls the opening and closing of described off-line valve and the wind direction of described cloth bag blower fan according to the signal of described pressure sensor.
As preferably, described electric cleaner comprises three electric field rooms.
Another technical problem that the present invention will solve is, provides a kind of method effectively can removing the ultrafine dust in dusty gas.
Present invention also offers the operation method of the cleaner of a kind of parasitic type combination, comprise and carry out following steps successively:
(1) dusty gas enters electric cleaner, electric field indoor electric from, to move to dust collecting electrode and to be gathered in dust collecting electrode, through rapping, most of dust enters in dust collection device;
(2) during rapping, a part of ultrafine dust returns to electric field indoor, and is gathered in the top of electric field room with the ultrafine dust newly produced;
(3) ultrafine dust assembled at the top of the electric field room of described electric cleaner is extracted to sack cleaner;
(4) air is discharged to through described sack cleaner purified gas through the main exhaust duct of described electric cleaner;
(5) the cloth bag blower fan blowback of described sack cleaner, discharges the ultrafine dust collected through described sack cleaner.
As preferably, described step (3) specifically comprises the steps:
(31) controller receives the signal being positioned at the dust concentration sensor of the electric field room of described electric cleaner, calculates the dust concentration of described electric field room according to the signal of described dust concentration sensor;
(32) when the dust concentration of described electric field room meets or exceeds predetermined value, described controller opens is positioned at the second control valve on the main induced duct of described sack cleaner and cloth bag blower fan, extracts the ultrafine dust assembled at the top of the electric field room of described electric cleaner to sack cleaner.
As preferably, described dust collection method comprises the steps: further
(6) controller receives the temperature signal of the temperature sensor be positioned on described sack cleaner or main induced duct to judge whether the temperature of described sack cleaner exceedes predetermined value;
(7) when the temperature in described sack cleaner meets or exceeds predetermined value, the by-passing valve in the bypass that described controller opens communicates with described sack cleaner, makes itself and air pass to the temperature reduced in described sack cleaner mutually.
The cleaner of parasitic type combination of the present invention and operation method thereof, have following beneficial effect:
1) because only need extract the gas that top, electric field room comprises ultrafine dust out, the gas flow of extraction is very little, and the volume of required sack cleaner is little, it is little to invest.
2) because sack cleaner is in parallel with electric cleaner, the resistance of the pipeline of electric cleaner is not increased.
3) equally because sack cleaner is in parallel with electric cleaner, can transform on the basis of existing electric cleaner and form, and when transforming, do not need the structure changing original electric cleaner, there is the advantage that the engineering time is short, cost is low, transformation is not subject to place restriction, little impact on production.
4) ultrafine dust can be reclaimed at multiple electric field simultaneously.
5) because sack cleaner is only responsible for filtering ultrafine dust, its replacement cycle can greatly be extended.
6) can select to allow sack cleaner continuously or intermitten operation, when the top of electric field room is full of ultrafine dust, need to start sack cleaner during work, otherwise can shut down, improve the life-span of sack cleaner further.
Accompanying drawing explanation
Fig. 1 is the cleaner structure composition frame chart of the parasitic type combination of embodiments of the invention;
Fig. 2 is the object construction figure of the cleaner of the parasitic type combination shown in Fig. 1.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
As shown in Figure 1 and Figure 2, the cleaner of the parasitic type combination of embodiments of the invention, comprises electric cleaner 1, three electric field rooms with three electric field rooms and is followed successively by the first electric field room 12, electric field room 11, second, the 3rd electric field room 13; The main exhaust duct 7 of electric cleaner 1 is provided with main air blower (main air blower is positioned at the end of main exhaust duct 7, not shown in Fig. 2).The cleaner of parasitic type of the present invention combination also comprises and the sack cleaner 2 of electric cleaner 1 parallel connection and the pipe network for the electric field room and sack cleaner 2 that are connected electric cleaner 1, described pipe network comprises and is connected to the first electric field room 11, second electric field room 12, one or more arm 4 at the top of the 3rd electric field room 13 and respectively with the main induced duct 5 of the inlet communication of arm 4 and sack cleaner 2, in the present embodiment, the top of each electric field room arranges multiple arm 4, and be connected with main induced duct 5 through a transverse tube 42, the top of each electric field room arranges multiple arm 4, be convenient to the ultrafine dust extracting top, each electric field room equably.Certainly can also arrange an arm 4 on the top of an electric field room, the arm 4 of multiple electric field room is by the inlet communication of main induced duct 5 with sack cleaner 2.The outlet of sack cleaner 2 is connected with cloth bag blower fan 6, and the outlet of cloth bag blower fan 6 is connected with secondary exhaust duct 71, and secondary exhaust duct 71 is connected with main exhaust duct 7, and before secondary exhaust duct 71 and the junction of main exhaust duct 7 be positioned at main air blower.As shown in Figure 2, in order to regulate secondary exhaust duct 71 and and main exhaust duct 7 between pressure, secondary exhaust duct 71, before being connected with main exhaust duct 7, is provided with the 3rd control valve 701.
Under the effect of main air blower, negative pressure is in electric cleaner 1 and connected pipeline, under the effect of cloth bag blower fan 2, also be negative pressure in sack cleaner 2 and connected pipeline, when the negative pressure of sack cleaner 2 is greater than the negative pressure in electric cleaner 1, the gas containing ultrafine dust at the first electric field room 12, electric field room 11, second of electric cleaner 1, the top of the 3rd electric field room 13 is drawn out of, and after sack cleaner 2 purifies, its dust concentration is reduced to 30mg/Nm
3and below, reach discharge standard, enter the main exhaust duct 7 be connected with electric cleaner 1 through secondary exhaust duct 71, extracted out by main air blower, or enter air or enter next step operation.
The cleaner of parasitic type combination of the present invention is divided the work to electric cleaner and sack cleaner, and make sack cleaner 2 be responsible for reclaiming ultrafine dust, electric cleaner plays the effect of main deduster, is responsible for reclaiming the most of dust except ultrafine dust.Technical scheme of the present invention, utilizes the feature that ultrafine dust is assembled to the top of electric field room, and only need extract the part gas that top, electric field room comprises ultrafine dust out, the gas flow of extraction is less, and the volume of required sack cleaner is little, it is little to invest.Because sack cleaner is in parallel with electric cleaner, is equivalent to sack cleaner and colonizes in the main dust pelletizing system formed primarily of electric cleaner, do not change the resistance certainly more not increasing the pipeline of electric cleaner.Compared with the scheme of series connection sack cleaner, greatly reduce power consumption.Equally because sack cleaner is in parallel with electric cleaner; can transform on the basis of existing electric cleaner; can reduce costs; and when transforming on the basis of existing electric cleaner, do not need the structure changing original electric cleaner, only need to increase a set of sack cleaner in its vicinity; and corresponding pipeline is set; just just need when pipeline connection construction shut down, have the engineering time short, transformation do not limit by place, the advantage of little impact on production.In addition, as depicted in figs. 1 and 2, adopt a main induced duct and multiple arm connected mode, ultrafine dust can be reclaimed at multiple electric field simultaneously.Because sack cleaner is only responsible for filtering ultrafine dust, its bear the dusty gas of filtration volume only account for wherein sub-fraction, increase compared with the technical scheme of sack cleaner in the rear end of electric cleaner with adopting in prior art, greatly can extend the replacement cycle of sack cleaner, and reduce the running resistance of electric cleaner, reduce overall power.In the present invention, sack cleaner can not work independently, and it grafts in the system primarily of electric cleaner composition, is similar to and colonizes on electric cleaner, and on electric cleaner basis, effectively takes out the ultrafine dust in dusty gas.
In addition, because sack cleaner is only responsible for filtering ultrafine dust, and be connected with electric cleaner by pipe network, therefore the setting of sack cleaner is not by the restriction in place, can arrange the place with electric cleaner with certain distance.
As the preferred method of operation, can select to allow sack cleaner continuously or intermitten operation, only have when the top of electric field room is full of ultrafine dust, need to start sack cleaner during work, otherwise can shut down, improve the life-span of sack cleaner further.Those skilled in the art, can select the suitable startup cycle according to the character of the flue dust of required purification and flow, often starts a sack cleaner at regular intervals
As depicted in figs. 1 and 2, as preferably, in this enforcement, sack cleaner is also connected with the bypass communicated with air, and bypass is provided with the by-passing valve 51 for regulating the gas temperature in sack cleaner.When the temperature in sack cleaner 2 exceedes the safe operating temperature of its setting, open by-passing valve 51, sack cleaner 2 communicates with air, and because sack cleaner is negative pressure, air enters sack cleaner 2, reduces its temperature.In the present embodiment, the bypass at by-passing valve 51 place is connected with main induced duct 5, and under the state that by-passing valve 51 is opened, air enters sack cleaner 2 through main induced duct 5.
As preferably, the cleaner of the parasitic type combination of the present embodiment also comprises controller, and main induced duct 5 is provided with temperature sensor 22, and temperature sensor 22 also can be arranged in sack cleaner 2.Controller controls opening or closing of by-passing valve 51 according to the signal of temperature sensor 22.Controller can adopt common industrial PLC.Like this, the temperature signal that PLC can gather according to temperature sensor 22 controls opening or closing of by-passing valve 51, realizes temperature auto-control.
As preferably, as shown in Figure 2, arm 4 is provided with the first control valve 41, and main induced duct 5 is provided with the second control valve 21, first control valve 41 and the second control valve 21 are conventional control valve, can be used to pressure and/or the flow of the gas regulating in arm 4 and main induced duct 5.
In order to realize automatically starting sack cleaner 2, as preferably, the top of the first electric field room 12, electric field room 11, second, the 3rd electric field room 13 is respectively equipped with dust concentration sensor (not shown), dust concentration sensor is connected with controller, and controller controls the opening and closing of the second control valve 21 and cloth bag blower fan 6 according to the signal of dust concentration sensor.As long as when having the dust concentration detected by a dust concentration sensor to meet or exceed predetermined value, just open the second control valve 21, and start cloth bag blower fan, sack cleaner 2 is worked.Make sack cleaner 2 only work within the time of necessity like this, reduce energy consumption.When the dust concentration at the first electric field room 12, electric field room 11, second, the 3rd top, electric field room 13 does not all reach predetermined value, the second control valve 21 cuts out, cloth bag blower fan 6 is shut down, can economize energy, also can extend the life-span of sack cleaner 2.
In addition, preferably, in the present embodiment, the import of sack cleaner 2 is provided with off-line valve (not shown), be provided with pressure sensor in sack cleaner 2, controller is connected with pressure sensor and controls the opening and closing of off-line valve and the wind direction of cloth bag blower fan 6 according to the signal of pressure sensor.When the pressure in sack cleaner 2 exceedes predetermined value, off-line valve closing, sack cleaner 2 and main dust pelletizing system separate, and cloth bag blower fan 6 is oppositely dried, to remove the ultrafine dust be attached on cloth bag.
It is to be noted, in the present embodiment, be described for the electric cleaner with three electric field rooms, in fact the electric field room of electric cleaner can be one or more, selects according to the character of the dusty gas of required purification, flow and investment budgey.
For realizing sack cleaner energy the automatic recovery ultrafine dust, in sack cleaner, being provided with one or more dirt pocket, in each dirt pocket, being provided with pressure sensor and off-line valve.When dedusting room pressure raises, when meeting or exceeding predetermined value, controller controls off-line valve and automatically cuts out, and dirt pocket and electric cleaner separate, and off-line blowback starts, until after deashing terminates, off-line valve is being opened out.Be positioned on the ash bucket below dirt pocket, be provided with level-sensing device, when on ash bucket, ultrafine dust is stacked into scheduled volume, level-sensing device provides signal, and controller controls ash-transmission system and starts, and ultrafine dust is discharged into bulk cement truck.
Below describe the operation method of the cleaner of parasitic type of the present invention combination in detail, comprise and carry out following steps successively:
(1) dusty gas enters electric cleaner, electric field indoor electric from, to move to dust collecting electrode and to be gathered in dust collecting electrode, through rapping, most of dust enters in dust collection device;
(2) during rapping, a part of ultrafine dust returns to electric field indoor, and is gathered in the top of electric field room with the ultrafine dust newly produced;
(3) ultrafine dust assembled at the top of the electric field room of electric cleaner is extracted to sack cleaner;
(4) air is discharged to through sack cleaner purified gas through the main exhaust duct of described electric cleaner;
(5) the cloth bag blower fan blowback of sack cleaner, discharges the ultrafine dust collected through sack cleaner.
In order to automatically start sack cleaner, as preferably, step (3) specifically comprises the steps:
(31) controller receives the signal being positioned at the dust concentration sensor of the electric field room of electric cleaner, calculates the dust concentration of electric field room according to the signal of dust concentration sensor;
(32) when the dust concentration of electric field room meets or exceeds predetermined value, controller opens is positioned at the second control valve on the induced duct of sack cleaner and cloth bag blower fan, extracts the ultrafine dust assembled at the top of the electric field room of electric cleaner to sack cleaner.Can select to allow sack cleaner intermitten operation, when the top of electric field room is full of ultrafine dust, need to start sack cleaner during work, otherwise can shut down, improve the life-span of sack cleaner further.
In order to automatically adjust the temperature in sack cleaner, prevent it overheated, dust collection method comprises the steps: further
(6) controller receives the temperature signal of the temperature sensor be positioned on sack cleaner or main induced duct to judge whether the temperature of sack cleaner reaches predetermined value;
(7) when temperature sensor detects that numerical value degree meets or exceeds predetermined value, controller opens is positioned at the by-passing valve in the bypass of sack cleaner, makes itself and air pass to the temperature reduced in sack cleaner mutually.Owing to being negative pressure in sack cleaner and the pipeline that communicates with it, the pressure of air is higher, air is sent into sack cleaner and mixes with dusty gas, reduce its temperature, the normal work of guarantee sack cleaner.
The cleaner of parasitic type combination of the present invention and operation method thereof, utilize in electric field and constantly produce ultrafine dust, and ultrafine dust concentrates on the rule of electric field headroom, gas containing ultrafine dust is extracted into the external of electric cleaner, after cloth bag system recoveries, then the gas of purification is sent back in original system.Fully utilize the advantage of two kinds of cleaners, and avoided its shortcoming, thoroughly solve the airborne dust again of electric cleaner.In the cleaner of parasitic type combination of the present invention, the flow of newly-increased sack cleaner is 5.4% of main system flow.A little sack cleaner, can solve the ultrafine dust problem of a large-scale electric cleaner, and can transform on the basis of existing technology, have the advantage that cost is low.
Certainly, the above is the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a cleaner for parasitic type combination, comprise the electric cleaner with one or more electric field rooms, the main exhaust duct of described electric cleaner is provided with main air blower; It is characterized in that,
Also comprise and the sack cleaner of described electric cleaner parallel connection and the pipe network for the electric field room and sack cleaner that are connected described electric cleaner, described pipe network comprise the top being connected to described electric field room one or more arm and respectively with the main induced duct of the inlet communication of described arm and described sack cleaner;
The outlet of described sack cleaner is connected with cloth bag blower fan, and the outlet of described cloth bag blower fan is connected with secondary exhaust duct, and described secondary exhaust duct is connected with described main exhaust duct, and before the junction of described secondary exhaust duct and described main exhaust duct is positioned at described main air blower.
2. the cleaner of parasitic type combination as claimed in claim 1, it is characterized in that, described sack cleaner is also connected with the bypass communicated with air, and described bypass is provided with the by-passing valve for regulating the gas temperature in described sack cleaner.
3. the cleaner of parasitic type combination as claimed in claim 2, it is characterized in that, described arm is provided with the first control valve, and described main induced duct is provided with the second control valve on the pipeline be connected with described sack cleaner.
4. the cleaner of parasitic type combination as claimed in claim 3, it is characterized in that, also comprise controller, in described sack cleaner or main induced duct be provided with temperature sensor, described controller controls opening or closing of described by-passing valve according to the signal of described temperature sensor.
5. the cleaner of parasitic type combination as claimed in claim 4, it is characterized in that, the top of described electric field room is provided with dust concentration sensor, described dust concentration sensor is connected with described controller, and described controller controls the opening and closing of described second control valve and cloth bag blower fan according to the signal of described dust concentration sensor.
6. the cleaner of the parasitic type combination as described in claim 4 or 5, it is characterized in that, described sack cleaner comprises at least one or more dirt pocket, the import of each described dirt pocket is provided with off-line valve, be equipped with pressure sensor in each described dirt pocket, described controller is connected with pressure sensor and controls the opening and closing of described off-line valve and the wind direction of described cloth bag blower fan according to the signal of described pressure sensor.
7. the cleaner of parasitic type combination as claimed in claim 1, it is characterized in that, described electric cleaner comprises three electric field rooms.
8. the operation method of the cleaner of the parasitic type combination as described in any one of claim 1-7, is characterized in that, comprise and carry out following steps successively:
(1) dusty gas enters electric cleaner, electric field indoor electric from, to move to dust collecting electrode and to be gathered in dust collecting electrode, through rapping, most of dust enters in dust collection device;
(2) during rapping, a part of ultrafine dust returns to electric field indoor, and is gathered in the top of electric field room with the ultrafine dust newly produced;
(3) ultrafine dust assembled at the top of the electric field room of described electric cleaner is extracted to sack cleaner;
(4) air is discharged to through described sack cleaner purified gas through the main exhaust duct of described electric cleaner;
(5) the cloth bag blower fan blowback of described sack cleaner, discharges the ultrafine dust collected through described sack cleaner.
9. operation method as claimed in claim 8, it is characterized in that, described step (3) specifically comprises the steps:
(31) controller receives the signal being positioned at the dust concentration sensor of the electric field room of described electric cleaner, calculates the dust concentration of described electric field room according to the signal of described dust concentration sensor;
(32) when the dust concentration of described electric field room meets or exceeds predetermined value, described controller opens is positioned at the second control valve on the main induced duct of described sack cleaner and cloth bag blower fan, extracts the ultrafine dust assembled at the top of the electric field room of described electric cleaner to sack cleaner.
10. operation method as claimed in claim 8 or 9, is characterized in that, comprise the steps: further
(6) controller receives the temperature signal of the temperature sensor be positioned on described sack cleaner or main induced duct to judge whether the temperature of described sack cleaner exceedes predetermined value;
(7) when the temperature in described sack cleaner exceedes predetermined value, the by-passing valve in the bypass that described controller opens communicates with described sack cleaner, makes itself and air pass to the temperature reduced in described sack cleaner mutually.
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| CN111331252B (en) * | 2020-04-17 | 2022-04-19 | 大族激光科技产业集团股份有限公司 | Air draft dust removal method and system of large-breadth laser cutting machine tool |
| CN113941215B (en) * | 2020-07-17 | 2023-12-29 | 中冶长天国际工程有限责任公司 | Intermittent activated carbon dust purifying method adopting intermittent activated carbon purifying system |
| CN115228186A (en) * | 2022-06-18 | 2022-10-25 | 首钢智新迁安电磁材料有限公司 | Filtering device and filtering control method, device and equipment thereof |
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| CN201168531Y (en) * | 2008-03-17 | 2008-12-24 | 江苏科宝机械制造有限公司 | Electricity-backhose combined dust collector |
| CN101732938A (en) * | 2008-11-26 | 2010-06-16 | 威海市正大环保设备有限公司 | Method and device for electric catching and dry-process purification of carbon baking flue gas |
| CN202666642U (en) * | 2012-07-17 | 2013-01-16 | 上海旌督机电科技有限公司 | Parasitic combined dust collecting device |
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| CN102755806A (en) | 2012-10-31 |
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