CN103055640A - Composite efficient cyclone and bag-type dust removal device and method - Google Patents
Composite efficient cyclone and bag-type dust removal device and method Download PDFInfo
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- CN103055640A CN103055640A CN2012104046452A CN201210404645A CN103055640A CN 103055640 A CN103055640 A CN 103055640A CN 2012104046452 A CN2012104046452 A CN 2012104046452A CN 201210404645 A CN201210404645 A CN 201210404645A CN 103055640 A CN103055640 A CN 103055640A
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Abstract
The patent of the invention aims to overcome the defects in the prior art, and provides a novel efficient composite dust removal device with combination of a cyclone dust removal device and a bag-type dust removal device and an automatic control function. A novel efficient dust removal method has the characteristics of short technical process, low cost, labor saving, low energy consumption, high dust removal efficiency, wide applicable occasion, high degree of automation and the like. In order to achieve the aim, the composite cyclone and bag-type dust removal device provided by the invention comprises a cyclone bin which comprises a cylindrical upper barrel body and a conical lower barrel body, wherein two symmetric air intakes are arranged on the side wall of the upper end of the upper barrel body and are connected with a rotary channel outside the upper barrel body, the rotary channel is communicated with the inside of the upper barrel body, a support rod, which penetrates the entire cyclone bin, is vertically arranged in the central position of a pattern plate and is provided with multiple levels of bag fixing rings, and a bag is fixed in the cyclone bin by the pattern plate and the bag fixing rings, so that the problem that the bag cannot be fixed as being blown by cyclone can be overcome.
Description
Technical field
The present invention relates to gas cleaning and dedusting technology field, specifically a kind of whirlwind cloth bag composite highly effective novel dedusting method and the device that can automatically control.
Background technology
Deduster be from dust-contained airflow with dust separation out and the device that is captured, be the capital equipment of dust pelletizing system.Cyclone dust collectors and sack cleaner are that to use at present wider dust arrester, cyclone dust collectors be the centrifugal force that utilizes dust-contained airflow to rotate and produce, the device that grit is separated and captures from gas.Be mainly used in capturing the above non-stickiness of 5--10 μ m, the dry grit of non-fiber.Cyclone dust collectors are compared with other dedusters, have simple in structure, movement-less part, low cost, efficiency of dust collection is higher, maintenance management is convenient and the characteristics of applicable face width.Sack cleaner is a kind of high efficiency deduster, and sack cleaner is based on the filtering type cleaner, utilizes organic fiber or inorfil filter cloth with the dust-filtering in the gas out.Dusty gas enters the middle part casing by air inlet, enters outside cloth bag in the cloth bag, and dust is stopped the surface of gear outside filter bag, and the air of purification enters in the bag, enters upper box by cloth bag top again, is discharged by blast pipe at last.
Cyclone dust collectors inside does not have movable part, and it is separated solids by means of the centrifugal force of dust-contained airflow from air-flow, is one of widely used cleaner in the industry, often is applied to the primary dust removing of Multilevel Dust Control System.Cyclone dust collectors are made, management is very convenient, process identical air quantity situation lower volume little, low price; When using as pre-duster, can vertically install, can also horizontally install, easy to use; Be convenient to many in parallel uses when processing Wind Volume, efficient is unaffected.But the gas leakage of cyclone dust collectors unloading valve can have a strong impact on efficiency of dust collection in the prior art; Particle is to cabin, whirlwind cabin body serious wear, and when particularly processing the large dust of high concentration or wearability, all easily grind away in porch and cone position; Efficiency of dust collection is not high, uses separately the requirement of sometimes not satisfying the dusty gas concentration of emission.Sack cleaner utilizes organic fiber or inorfil as filter bag with the dust-filtering in the gas out, especially the purification ratio of granule dust is had superiority, and is suitable as the two-stage dust removal equipment of dust pelletizing system.Low for the cyclone dust collectors purification efficiency, only can reach 70% efficient for big dust particle, micronic dust does not then play the shortcoming of much effects, behind the whirlwind primary dust removing, increase sack cleaner at whirlwind cabin negative pressuren zone, micronic dust remaining after the cyclone dust removal is carried out final dusting.The author is incorporated into cyclone dust removal and two dust removing units of bag-type dust together, is referred to as cyclone-bag composite dust collector.Cyclone-bag composite dust collector had both been simplified dust pelletizing system, had saved installing space, had improved again efficiency of dust collection.
Cyclone dust collectors inlet gas flow or flow velocity all have a significant impact the pressure loss, the efficiency of dust collection of cyclone dust collectors.Generally speaking, enter within the specific limits implication speed higher, efficiency of dust collection is also just higher, and this is because be added to implication speed, can increase grit centrifugal force at the volley, makes grit be easy to separate, and makes with efficiency of dust collection and improves.But gas speed is too high, and the turbulent extent of air-flow increases, and reentrainment is serious.In addition, gas speed is too high easily to make dust particle and wall friction aggravate, and causes coarse granule to be pulverized, and fine dust content is increased.Too high enter implication speed and also can play peptizaiton to the dust with cohesion character, when the entrance flow velocity surpassed threshold value, the impact of turbulent flow increased sooner with regard to score from effect, to such an extent as to efficiency of dust collection is with entering index that implication speed increases less than 1.If the gas of entrance speed further increases, efficiency of dust collection reduces on the contrary, and therefore, the implication speed that enters of cyclone dust collectors should not be too high.Seldom have in the prior art and relate to through dedusting condition feedback control intake in the deduster, so that the air inlet flow velocity reaches the design of efficiency of dust collection optimal value.Be illustrated in figure 1 as the cyclone duster structure fundamental diagram.See on the whole, the air-flow in the cyclone can be summed up as three motions: outer eddy current, interior eddy current, upper eddy current.Dust-contained airflow from top to bottom rotates along wall after tangentially entering deduster by import, and the downward air-flow of this burst rotation is called outer vortex, and outer vortex arrives cone base then rotates up along the axle center, discharges finally by discharge pipe.The air-flow that this strand rotates up is called inside vortex, the direction of rotation of outer vortex and inside vortex is identical, when dust-contained airflow rotated, grit promoted to move down to outer wall at centrifugal inertial force, and the grit that arrives outer wall falls into ash bucket along wall under air-flow and gravity acting in conjunction.Dust-contained airflow is during from the downward High Rotation Speed of dust remover roof, and top pressure descends, and a part of air-flow can be with dustshot along the outside wall surface rotation upwards, after arriving the top, along the discharge pipe rotation downwards, discharge from discharge pipe, this burst rotation air-flow upwards is called vortex again.Another fraction air-flow from the air inlet inflow, then flow to cyclone dust collectors top cover place, then along blast pipe lateral current downflow, when reaching the blast pipe lower end, be together to discharge from blast pipe with the central gas stream that rises on the counter steer, be dispersed in wherein grit also in company with being pulled away.
Patent 201010279494.3 all is related in the whirlwind cabin with patent 201010004451.4 sack cleaner is installed, but they and the inner technology that sack cleaner is installed in existing other whirlwind cabins, all do not consider the factor of whirlwind cabin eddy current distribution of sizes and the impact of upper eddy current, cloth bag is only to be installed in the inside, whirlwind cabin in the swirl space, not so cloth bag in the situation that additional fixation device is not installed can be bad by cyclonic air flow volume, wearing and tearing, and can't work.Do not have in actual applications practicality, in fact do not meet the condition of Patent Law three property.
In the air-tightness design of deduster, by static pressure distribution rule in the cyclone dust collectors as can be known, static pressure variation diametrically is to be descended gradually to the center by outer wall in the deduster.Even cyclone dust collectors move under positive pressure, cone base also can be in negative pressure state.If deduster bottom imprecision infiltrates extraneous air, can again take up the dust of the people's ash bucket that falls, dust collector efficiency will obviously descend.According to test, when air leak rate of air curtain was 0%, 5%, 15%, efficiency of dust collection was respectively 90%, 50%, 0%.Therefore, in the situation that not leaking out, assurance whirlwind cabin do not carry out the problems that normal deashing is cyclone dust collectors necessary attention in service.Prior art adopts the sub-rotary valve dust discharge of rice mostly, and the method bottom sealing type is poor, thus can be so that the reduction of whirlwind cabin efficiency of dust collection.Patent of the present invention is provided with regularly dust discharge of self-induction, and dust exhaustor is selected the spiral dust discharge, when having guaranteed the normal deashing of bottom, also the raising of large degree the air-tightness of deduster, improve efficiency of dust collection.
Summary of the invention:
The purpose of patent of the present invention remedies the deficiencies in the prior art exactly, the high efficiency composition deduster that provides a kind of novel cyclone dust collectors with automatic control function to combine with sack cleaner, it is short that this high-effective dust-removing new method has technological process, cost is low, save manpower, energy consumption is low, efficiency of dust collection is high, applicable situation is wide, has by characteristics such as setting requirement automatic control functions.
For reaching described purpose, a kind of whirlwind cloth of the present invention bag complex dust collector, comprise the whirlwind cabin, described whirlwind cabin is comprised of cylindrical upper shell and conical lower shell, described upper shell top is provided with air outlet, described lower shell bottom connects the storage ash bucket, described upper shell upper end sidewall is provided with two symmetrical air inlets, described air inlet connects the rotating channel in the upper shell outside, the inner UNICOM of described rotating channel and upper shell, described card center vertically is provided with the support bar that runs through whole whirlwind cabin, cloth bag retainer rings at different levels are housed on the described support bar, cloth bag is fixed in the whirlwind cabin by card and cloth bag retainer ring, and whirlwind cabin madial wall is provided with the atmospheric pressure sensor.
Preferably, described air inlet quantity is two, two air inlets divide and are located at both sides, upper shell top, every air inlet is to become 30--45 ° to be connected corresponding rotating channel with outer tube wall is tangent with horizontal line, the air inlet below is provided with the flue gas sampling mouth, described thief hatch is connected to dust concentration detector by sampling pipe, for detection of the air inlet dust concentration, is convenient to the ultimate analysis dust removing effects.The air inlet outside also is provided with the air inlet valve, can close an air inlet when not needing the bilateral air inlet, energy savings.
Preferably, described rotating channel is the spiral rotating channel, and the passage caliber reduces gradually.The spiral rotating channel is used for the gas flow that the guiding air inlet is come in, and guarantees that air intake flows according to the eddy flow path in the whirlwind cabin, has guaranteed the effect of cyclone dust removal.
Preferably, described support bar is provided with secondary cloth bag retainer ring and is used for fixedly secondary cloth bag, whirlwind cabin inwall is fixed with one-level cloth bag retainer ring and is used for fixedly one-level cloth bag, described one-level cloth bag is set in the secondary cloth bag outside, described one-level cloth bag bottom is fixed on the storage ash bucket, and secondary cloth bag bottom closure is fixed on the support bar.Securing cloth bag can not rock in eddy flow, guarantees dust removing effects.
Preferably, described upper shell madial wall is provided with whirlwind cabin atmospheric pressure sensor, is provided with one-level cloth bag atmospheric pressure sensor in the one-level cloth bag, and described support bar is provided with secondary cloth bag pressure detector.Such structure is for detection of whirlwind cabin and cloth bag internal pressure at different levels, when overrate, will reduce pressure, namely control the air inducing amount of frequency conversion fan and then the charge flow rate of reduction air inlet by the controller that is arranged on control alarm inside, control simultaneously vibrator cloth bags at different levels are carried out rapping, get rid of the dust of the obstruction cloth bag hole that adheres on the cloth bag.Controller compares the pressure in two-stage cloth bag and the whirlwind cabin, as find that pressure differential is excessive between them, and can't recover normal operation by rapping, illustrate that then cloth bag stops up, the alarm that is positioned at the control alarm is reported to the police, and reminds the staff to the cloth bag repair and replacement.In case and pressure differential is very approaching between them, be approximately zero, then explanation cloth bag therebetween is damaged, causes being communicated with between cloth bag and cloth bag or cloth bag and the whirlwind cabin, and alarm carries out the warning reminding staff and carries out repair and replacement at this moment.
Preferably, described air outlet connects the one-level cloth bag air outlet that is arranged on the middle secondary cloth bag air outlet of card and is looped around the secondary cloth bag air outlet outside, gas from cloth bag air outlets at different levels out after equal access to plant air outlets, the air outlet sidewall is provided with flue gas air outlet thief hatch, and the air outlet thief hatch connects the dust concentration survey meter by sampling pipe.So just can detect the dust concentration parameter of finally giving vent to anger, be used for judging that the deduster dust removing effects provides the parameter foundation.
Preferably, described whirlwind cabin top outer is provided with the control alarm, and described card below is provided with cloth bag vibrators at different levels.Described control alarm comprises controller and alarm two parts.The working condition of controller control vibrator, frequency conversion fan and the spiral dust exhaustor of control in the alarm, when equipment occurs when unusual, the alarm that is arranged in the control alarm will carry out fault alarm.
Preferably, described support bar bottom connects top, spiral dust exhaustor place and is provided with the dust stratification inductor, and described dust stratification inductor is sensed after the dust stratification information communication to the control alarm, the spiral dust exhaustor of the controller control storage ash bucket inside in the control alarm.Dust stratification just carries out dust discharge to a certain extent like this, has improved the operating efficiency of spiral dust exhaustor.And such overall tightness that has also improved deduster.
Preferably, diameter and aspect ratio D: H=1: the 2-1 in described whirlwind cabin: 5; The aspect ratio of upper shell and lower shell is 3: 2-2: 1.Such profile is conducive to improve the dust removing effects of deduster.
Further, the present invention also comprises a kind of whirlwind cloth bag high-effective dust-removing method, comprise: flue gas is introduced air inlet by frequency conversion fan with ash-laden gas, be designed with valve in each air inlet, be used for adjusting the quantity of air inlet, the place is provided with the flue gas sampling mouth at described air inlet, the flue gas sampling mouth connects dust concentration detector by sampling pipe the air inlet flue gas concentration is detected, after dust wind enters in the whirlwind cabin by rotating channel, the collision of rotation direction wall falls under the outside vortex effect of large particle, fall into the storage ash bucket, fine particle is threaded into inside vortex, under the effect of one-level cloth bag, carry out the cloth bag one-time dedusting, one-level cloth bag top design has one-level cloth bag air outlet, the flue gas that can enter after gas cleaning is up to standard after purifying in the situation of secondary bag-type dust can directly be discharged by one-level cloth bag air outlet, discharge through air outlet, the aperture of one-level cloth bag is greater than the aperture of secondary cloth bag, when can not satisfying emission request, the one-level bag-type dust can carry out the secondary bag-type dust, this moment, one-level cloth bag air outlet was in closed condition, clean gas behind the final dusting is discharged by secondary cloth bag air outlet, discharge via air outlet, the air outlet sidewall is provided with flue gas air outlet thief hatch, the air outlet thief hatch connects the dust concentration survey meter by sampling pipe, further understand the dust purification situation, with the device efficiency of dust collection, this upper cylinder body inboard, contrive equipment whirlwind cabin is provided with whirlwind cabin atmospheric pressure sensor simultaneously, be provided with one-level cloth bag atmospheric pressure sensor in the one-level cloth bag, set up secondary cloth bag atmospheric pressure sensor on the described support bar, these detector real-time detection cabin bodies and cloth bag internal pressure are transferred to the control alarm, the controller of control in the alarm by analysis after each stage pressure reach the backward vibrator of certain difference and send signal, control simultaneously the air inducing amount of frequency conversion fan, whirlwind cabin internal pressure is remained in certain scope, the deduster efficiency of dust collection reaches optimal effectiveness, deduster removes the dust that the dust that falls and rapping be scattered and enters in the storage ash bucket, by the induction of dust stratification inductor, discharged by controller control spiral dust exhaustor.
The present invention use the frequency converting induced draft fan dust-contained airflow enter the whirlwind cabin later on wherein lower the beating to the cabin body drop of bulky grain vortex cyclone effect cyclone dust collectors outside enter ash bucket, the air-flow of then removing crude particle dust is folded to and enters inside vortex and pass through sack cleaner and remove fine particle.Overcome that cloth bag is worn and torn by bulky grain and damaged problem in the prior art, prolonged cloth bag service life, guaranteed dust removing effects.
Description of drawings:
Fig. 1 is cyclone duster structure and internal gas flow schematic diagram.
Fig. 2 is the overall structure schematic diagram of a kind of whirlwind cloth bag of the present invention composite high-effect dust separator.
Fig. 3 is the internal structure schematic diagram of a kind of whirlwind cloth bag of the present invention composite high-effect dust separator.
Fig. 4 is the top view of a kind of whirlwind cloth bag of the present invention composite high-effect dust separator.
Fig. 5 is the sack cleaner structural representation of a kind of whirlwind cloth bag of the present invention composite high-effect dust separator.
Fig. 6 is the structural representation of the spiral dust catcher of a kind of whirlwind cloth bag of the present invention composite high-effect dust separator.
Fig. 7 is a kind of whirlwind cloth bag of the present invention composite high-effect dust separator entire system control block diagram.
The specific embodiment:
Internal pressure distributes as shown in Figure 1 during cyclone dust collectors work, and total head and static pressure are reduced to the axle center by outer wall gradually at the radial variations highly significant, and the place, axle center is for negative value, until cone base all is in negative pressure state.Experiment shows, square being directly proportional of the Pressure Drop of cyclone dust collectors and inlet velocity.
The resistance coefficient of ξ in the formula--cyclone, zero dimension;
The density of ρ--gas, kg/m
3
V
i--gas access speed, m/s.
Resistance coefficient is the characteristic value of expression performance of precipitator, is a constant to the cyclone dust collectors of certain structure model.
Show by analyzing with experiment, square being directly proportional of the Pressure Drop of cyclone dust collectors and inlet velocity, so patent of the present invention is by gathering whirlwind cabin 1 and cloth bag internal pressure value, process the frequency of 2 connecting fans of air inlet in rear control whirlwind cabin 1 by control alarm 4, the intake of control flue gas.So that the deduster internal pressure keeps certain balance, control simultaneously 4 pairs of pressure signals of alarm by analysis after, if draught head is excessive between whirlwind cabin 1 internal gas pressure and cloth bag internal gas pressure pressure reduction and the two-stage cloth bag, too much dust granules has been adhered in proof cloth bag hole, 9 pairs of cloth bags at different levels of controller startup vibrator of controlling this moment in the alarm 4 carry out rapping, guarantee the sack cleaner normal operation.
Such as Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 7.Specific embodiment is as follows: a kind of whirlwind cloth bag complex dust collector, comprise whirlwind cabin 1, described whirlwind cabin 1 is comprised of cylindrical upper shell and conical lower shell, described upper shell top is provided with air outlet 3, described lower shell bottom connects storage ash bucket 6, described upper shell upper end sidewall symmetry has two air inlets 2, described air inlet 2 connects the rotating channel 5 in the upper shell outside, the inner UNICOM of described rotating channel 5 and upper shell, two air inlets were located at the upper shell both sides in 2 minutes, every air inlet 2 is to become 30--45 ° along rotating channel 5 corresponding to outer tube wall tangential direction connection with horizontal line, described air inlet 2 belows are provided with flue gas sampling mouth 7, described thief hatch 7 is connected to dust concentration detector by sampling pipe, does not clog by rubber stopper when thief hatch 7 does not use, and guarantees overall tightness.Described air inlet 2 outsides also are provided with air inlet valve-off 11.Described rotating channel 5 is the spiral rotating channel, and the passage caliber reduces gradually.
Described card 8 centers vertically are provided with the support bar 13 that runs through whole whirlwind cabin 1 and storage ash bucket 6, cloth bag retainer rings at different levels are housed on the described support bar 13, cloth bag is fixed in the whirlwind cabin 1 by card 8 and cloth bag retainer ring, and whirlwind cabin 1 madial wall is provided with atmospheric pressure sensor 12.Described support bar 13 is provided with secondary cloth bag retainer ring 20 and is used for fixedly secondary cloth bag 15, and whirlwind cabin 1 inwall is fixed with one-level cloth bag retainer ring 21 and is used for fixedly one-level cloth bag 14, and described one-level cloth bag 14 is set in secondary cloth bag 15 outsides.Described one-level cloth bag 14 bottoms are fixed on the storage ash bucket 6, and secondary cloth bag 15 bottom closure are fixed on the support bar 13.Described upper shell inboard is provided with whirlwind cabin 1 atmospheric pressure sensor 12, is provided with one-level cloth bag atmospheric pressure sensor 18 in the one-level cloth bag 14, and described support bar 13 is provided with secondary cloth bag atmospheric pressure sensor 19.Described air outlet 3 connections are arranged on the secondary cloth bag air outlet 22 in the middle of the card 8 and the one-level cloth bag air outlet 23 that is looped around secondary cloth bag air outlet 22 outsides, gas all enters air outlet 3 from cloth bag air outlets at different levels after out, and air outlet 3 sidewalls are provided with air outlet thief hatch 10.
Described whirlwind cabin 1 top outer is provided with control alarm 4, controller in the control alarm 4 can be controlled the working condition of vibrator 9, frequency conversion fan and spiral dust exhaustor 17 in real time, when pressure differential exceeds normal range (NR) between device appearance unexpected whirlwind cabin 1 and cloth bag at different levels, alarm in the control alarm 4 will be reported to the police, and remind the workman to note safeguarding.
In addition, described support bar 13 bottoms connect storage top, ash bucket 6 inside spin dust exhaustors, 17 place and are provided with dust stratification inductor 16, described dust stratification inductor 16 transfers signals to control alarm 4 after sensing dust stratification, and the spiral dust exhaustor 17 that control alarm 4 internal controller will be controlled storage ash bucket 6 inside carries out dust discharge.
The diameter in described whirlwind cabin 1 and aspect ratio D: H=1: 2-1: 5; The aspect ratio of upper shell and lower shell is 3: 2-2: 1.
During work, be designed with valve 11 in each air inlet 2, can be according to fact of case, switch the quantity of air inlet 2,2 places are provided with flue gas sampling mouth 7 at described air inlet, as required the flue gas of air inlet 2 is sampled and detect with concentration, dust wind by rotating channel 5 enter whirlwind cabin 1 interior after, the collision of rotation direction wall falls under the outside vortex effect of large particle, fall into storage ash bucket 6, fine particle is threaded into inside vortex, under 14 effects of one-level cloth bag, carry out the cloth bag one-time dedusting, one-level cloth bag 14 top design have one-level cloth bag air outlet 23, and the flue gas that can enter after gas cleaning is up to standard after purifying in the situation of secondary cloth bag 15 dedustings can directly be discharged by one-level cloth bag air outlet 23, discharges through air outlet 3.The aperture of one-level cloth bag 14 is greater than the aperture of secondary cloth bag 15, can carry out 15 dedustings of secondary cloth bag when 14 dedustings of one-level cloth bag can not be satisfied emission request.One-level cloth bag air outlet 23 is closed at this moment, and the clean gas behind the final dusting is discharged by secondary cloth bag air outlet 22, also discharges via air outlet 3.Air outlet 3 sidewalls are provided with flue gas air outlet thief hatch 10, and flue gas air outlet thief hatch 10 connects dust concentration detector by sampling pipe, and the air outlet flue gas concentration is detected.Further understand the gas cleaning situation, with the device efficiency of dust collection.
This 1 upper cylinder body inboard, contrive equipment whirlwind cabin is provided with whirlwind cabin 1 atmospheric pressure sensor 12 simultaneously, is provided with one-level cloth bag atmospheric pressure sensor 18 in the one-level cloth bag 14, has set up secondary cloth bag atmospheric pressure sensor 19 on the described support bar 13.These detector real-time detection cabin bodies and cloth bag internal gas pressure pressure transfer signals to control alarm 4, reach the backward vibrator 9 of certain difference through pressure after 4 analyses of control alarm and send signal, control simultaneously the intake of frequency conversion fan, whirlwind cabin 1 internal pressure is remained in certain scope, and the deduster efficiency of dust collection reaches optimal effectiveness.
Deduster removes the dust that the dust that falls and rapping be scattered and enters in the storage ash bucket 6, is transferred to control alarm 4 by 16 inductions of dust stratification inductor, and the ash discharge signal is transferred to spiral dust exhaustor 17 after by the controller analysis, and spiral dust exhaustor 17 is discharged dust stratification.As shown in Figure 6, spiral dust exhaustor 17 adopts helical forms, and the dust discharge good airproof performance ensures the air-tightness in whirlwind cabin 1, has improved the efficiency of dust collection of whole deduster.
The sack cleaner air outlet is according to the characteristics of cloth bags at different levels in the inside vortex, the one-level cloth bag air outlet 23 that is provided with secondary cloth bag air outlet 22 and is looped around secondary cloth bag air outlet 22 outsides, each air outlet is provided with valve, can open and close according to the occasion needs.When only needing primary dust removing, then to close the corresponding valve of another grade cloth bag.Behind the outer vortex primary dust removing of flue gas process whirlwind, flue gas enters the cloth bag multistage rotary dust collector of inside vortex under gas pressure, the present invention is provided with separately air outlet valve of the interior cloth bags at different levels of cloth bag, can be according to the specific occasion to the air outlet in the fume emission requirement selection cloth bag.
Patent of the present invention adopts the air inlet of twoport revolving spiral passage, can effectively improve air-flow off-centre the whirlwind resistance is significantly descended, air inlet rotating channel design size reduces from top to bottom gradually in addition, and cyclonic wind is increased gradually by little in the practical application, increased whirlwind vortex power, efficiency of dust collection is strengthened.Generally speaking, under same tangential velocity, barrel diameter is less, and the centrifugal inertial force that grit is subject to is larger, and then efficiency of dust collection is higher but barrel diameter is too small, and the grit fugacity makes decrease in efficiency.The outlet diameter reduces, and then inside and outside eddy current interface diameter reduces, and has reduced inside vortex, is conducive to improve efficiency of dust collection, and then efficient increases.But the discharge pipe diameter is too small, and SR can increase, thus can not be too little, generally get simplified diameter and discharge pipe diameter ratio value is 1.5～2.0.
Compared with prior art patent advantage of the present invention is:
(1) adopt the air-supply of bidirectional screw pipeline, the whirlwind pipeline size adopts gradually little turn passage, increases whirlwind wind-force, namely can the effective separation large-size particles, further reduce negative pressuren zone pressure simultaneously, and speed the pure air ascending air, improve efficiency of dust collection.
(2) negative pressuren zone adopts cloth bag to carry out final dusting, remedies the not high shortcoming of cyclone dust removal efficient of knowing clearly, so that flue gas carries out the cloth bag final dusting after the cyclone dust removal, has greatly improved the flue gas cleaning degree.Cloth bags at different levels are provided with independent air outlet and can discharge the different cloth bag air outlet of occasion selection, the application scenario of having widened this device according to variable concentrations in the secondary bag-type dust.
(3) deduster central authorities are provided with fixed bar, be provided with the fixedly retainer ring of cloth bag on the bar, the bottom is provided with grey inductor simultaneously, and the gear dust runs up to the certain altitude inductor and transfers signals to the control alarm, and controller can be controlled dust exhaustor and be rotated automatic dust discharge.Manpower has been saved in the self-induction dust discharge.
(4) cyclone dust removal bottom ash exhauster is the spiral dust exhaustor, the dust in the ash bucket is rotated formula ejects outward, has protected like this air-tightness in whole whirlwind cabin, has improved dust removing effects.
(5) have automatic detection function, the detection of force value between cloth bag and the cabin body is sampled to whirlwind air inlet and cloth bag air outlet flue gas and to be realized the detection of dust concentration.Make things convenient for the staff to understand in real time the work on the spot situation.
(7) have real-time analysis and control device internal pressure and efficiency of dust collection function, device is provided with warning function, carries out the warning reminding staff and stops operation and keep in repair when device inside alarm very first time of breaking down.
(8) whirlwind primary dust removing with the bulky grain sedimentation, has prevented the wearing and tearing of bulky grain to cloth bag, has prolonged cloth bag service life and dust removing effects.
(9) adopting can be according to the frequency converting induced draft fan of whirlwind cabin internal information FEEDBACK CONTROL, can the real-time control apparatus air inflow, so that install safe and reliablely, it is optimum that efficient reaches.
(10) adopt simultaneously technical scheme of the present invention, the flue gas air inlet is entered gas sample and to record air inlet dust concentration C
0, device air outlet thief hatch can gather the flue gas after deduster is processed and then detect flue gas air outlet dust concentration C, in the actual motion or these data, can estimate theoretically the efficiency of dust collection of deduster to these numerical value analyses.When closing secondary cloth bag air outlet, by the exhaust of one-level cloth bag air outlet, can gather air outlet gas this moment and detect one-level bag-type dust fuel gas and dust concentration C behind the flue gas process cloth bag primary dust removing
1, this moment Δ C
1=C
0-C
1(1), as estimating one-level bag-type dust efficiency parameters, with should closing one-level cloth bag air outlet when opening secondary cloth bag air outlet, flue gas is discharged after through the two-stage bag-type dust, gathers air outlet exhaust gas dust concentration this moment and can detect flue gas concentration C behind the two-stage bag-type dust
2, Δ C
2=C
0-C
2(2) as the parameter of estimating the sack cleaner efficiency of dust collection.
(1) (2) two formula simultaneous just can be in the hope of the dedusting effect Δ C=C of secondary cloth bag in the sack cleaner
1-C
2(3)
So just can utilize real data to estimate the efficiency of dust collection of whole device and dedusters at different levels from the dedusting angle.
Claims (10)
1. whirlwind cloth bag complex dust collector, comprise whirlwind cabin (1), described whirlwind cabin (1) is comprised of cylindrical upper shell and conical lower shell, described upper shell top is provided with air outlet (3), described lower shell bottom connects storage ash bucket (6), it is characterized in that: described upper shell upper end sidewall is provided with two air inlets (2), described air inlet (2) connects the rotating channel (5) in the upper shell outside, described rotating channel (5) and the inner UNICOM of upper shell, described card (8) center vertically is provided with the support bar (13) that runs through whole whirlwind cabin (1), cloth bag retainer rings at different levels are housed on the described support bar (13), cloth bag is fixed in the whirlwind cabin (1) by card (8) and cloth bag retainer ring, and whirlwind cabin (1) madial wall is provided with atmospheric pressure sensor (12).
2. a kind of whirlwind cloth bag complex dust collector as claimed in claim 1, it is characterized in that: described two air inlets (2) were located at both sides, upper shell top in symmetrical minute, air inlet (2) is to become the tangent corresponding rotating channel (5) that is connected of 30--45 ° of angle and outer tube wall with horizontal line, described air inlet (2) below is provided with flue gas sampling mouth (7), and described air inlet (2) outside also is provided with air inlet valve-off (11).
3. a kind of whirlwind cloth bag complex dust collector as claimed in claim 1 or 2, it is characterized in that: described rotating channel (5) is the spiral rotating channel, and the passage caliber reduces gradually.
4. a kind of whirlwind cloth bag complex dust collector as claimed in claim 1, it is characterized in that: described support bar (13) is provided with secondary cloth bag retainer ring (20) and is used for fixedly secondary cloth bag (15), whirlwind cabin (1) inwall is fixed with one-level cloth bag retainer ring (21) and is used for fixedly one-level cloth bag (14), described one-level cloth bag (14) is set in secondary cloth bag (15) outside, described one-level cloth bag (14) bottom is fixed on the storage ash bucket (6), and secondary cloth bag (15) bottom closure is fixed on the support bar (13).
5. a kind of whirlwind cloth bag complex dust collector as claimed in claim 4, it is characterized in that: described upper shell madial wall is provided with whirlwind cabin (1) atmospheric pressure sensor (12), be provided with one-level cloth bag atmospheric pressure sensor (18) in the one-level cloth bag (14), set up secondary cloth bag atmospheric pressure sensor (17) on the described support bar (13).
6. a kind of whirlwind cloth bag complex dust collector as claimed in claim 4, it is characterized in that: described air outlet (3) connects the one-level cloth bag air outlet (23) that is arranged on the middle secondary cloth bag air outlet (22) of card (8) and is looped around secondary cloth bag air outlet (22) outside, gas all enters air outlet (3) from cloth bag air outlets at different levels after out, and air outlet (3) is provided with air outlet thief hatch (10).
7. a kind of whirlwind cloth bag complex dust collector as claimed in claim 1 is characterized in that: top, described whirlwind cabin (1) is provided with control alarm (4), and described card (8) below is provided with cloth bag vibrators at different levels (9).
8. a kind of whirlwind cloth bag complex dust collector as claimed in claim 1, it is characterized in that: described support bar (13) bottom connection spiral dust exhaustor (17) is located top and is provided with dust stratification inductor (16), described dust stratification inductor (16) is reported to the police communication (4) to controller after sensing dust information, and the inner spiral dust exhaustor (17) of the controller control storage ash bucket (6) in the control alarm (4) rotates discharges dust stratification.
9. a kind of whirlwind cloth bag complex dust collector as claimed in claim 1 is characterized in that: the diameter in described whirlwind cabin (1) and aspect ratio D: H=1: 2-1: 5; The aspect ratio of upper shell and lower shell is 3: 2-2: 1.
10. dust collection method that is used for a kind of whirlwind cloth bag complex dust collector as claimed in claim 1, it is characterized in that: controller is introduced air inlet (2) by the control frequency conversion fan with pending flue gas, be designed with air inlet valve-off (11) in each air inlet (2), be used for adjusting the quantity of air inlet (2), there is flue gas sampling mouth (7) that the air inlet flue gas is sampled in described air inlet (2) arranged outside, after dust wind enters in the whirlwind cabin (1) by rotating channel (5), the collision of rotation direction wall falls under the outside vortex effect of large particle, fall into storage ash bucket (6), fine particle is threaded into inside vortex, under one-level cloth bag (14) effect, carry out the cloth bag one-time dedusting, one-level cloth bag (14) top design has one-level cloth bag air outlet (23), the flue gas that can enter after gas cleaning is up to standard after purifying in the situation of secondary cloth bag (15) dedusting can directly be discharged by one-level cloth bag air outlet (23), discharge through air outlet (3), the aperture of one-level cloth bag (14) is greater than the aperture of secondary cloth bag (15), when can not satisfying emission request, one-level cloth bag (14) dust removing effects can carry out secondary cloth bag (15) dedusting, clean gas behind the final dusting is discharged by secondary cloth bag air outlet (22), discharge via air outlet (3), air outlet (3) sidewall is provided with flue gas air outlet thief hatch (10), by the flue gas after processing is carried out sampling analysis, further understand dust purification situation and device efficiency of dust collection.This upper cylinder body inboard, patent of invention whirlwind cabin (1) is provided with whirlwind cabin (1) atmospheric pressure sensor (12) simultaneously, be provided with one-level cloth bag atmospheric pressure sensor (18) in the one-level cloth bag (14), described support bar (13) is provided with secondary cloth bag atmospheric pressure sensor (17), these detector real-time detection cabin body and cloth bag internal pressures, being transferred to control alarm (4) reaches the backward vibrator of certain difference (9) through pressure after the controller analysis and sends the rapping signal, thereby control simultaneously the frequency control air inflow of frequency conversion fan, whirlwind cabin (1) internal pressure is remained in certain working range, the deduster efficiency of dust collection reaches optimal effectiveness, deduster removes the dust that the dust that falls and rapping be scattered and enters in the storage ash bucket (6), be transferred to control alarm (4) by dust stratification inductor (16) induction dust stratification signal, controller sends the ash discharge signal, is discharged by spiral dust exhaustor (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104046452A CN103055640A (en) | 2012-10-18 | 2012-10-18 | Composite efficient cyclone and bag-type dust removal device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104046452A CN103055640A (en) | 2012-10-18 | 2012-10-18 | Composite efficient cyclone and bag-type dust removal device and method |
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| CN103055640A true CN103055640A (en) | 2013-04-24 |
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| CN2012104046452A Pending CN103055640A (en) | 2012-10-18 | 2012-10-18 | Composite efficient cyclone and bag-type dust removal device and method |
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| CN105057099A (en) * | 2015-07-31 | 2015-11-18 | 湖州杨氏塑料助剂有限公司 | Tail gas treatment device for producing MBS |
| CN105382257A (en) * | 2014-09-03 | 2016-03-09 | Slm方案集团股份公司 | Apparatus for producing work pieces with an improved gas circuit |
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| CN111113593A (en) * | 2019-12-27 | 2020-05-08 | 南京沃泰克机械有限公司 | Clean environment type dustless table type cutting machine |
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| CN112337244A (en) * | 2020-10-25 | 2021-02-09 | 山东天智信息科技有限公司 | Dust-containing waste gas degradation device |
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Application publication date: 20130424 |