CN100512922C - Exterior sieve type bag-type dust remover and its ashing method - Google Patents
Exterior sieve type bag-type dust remover and its ashing method Download PDFInfo
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- CN100512922C CN100512922C CNB2007101284091A CN200710128409A CN100512922C CN 100512922 C CN100512922 C CN 100512922C CN B2007101284091 A CNB2007101284091 A CN B2007101284091A CN 200710128409 A CN200710128409 A CN 200710128409A CN 100512922 C CN100512922 C CN 100512922C
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- bag
- air
- blowback
- dust remover
- type dust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/06—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material with means keeping the working surfaces flat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
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- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention relates to an external filtering bag type dust remover and a method for ash removing to the remover thereof. The inner side of the box body of the external filtering bag type remover is provided with a figure pattern card which is fixedly arranged with the filter bag of the inner inserting bag cage that tenses the filter bag, and the external filtering bag type dust remover further includes a back flushing device which provides pressure-stable back flushing air current in the ash removing. The external filtering bag type dust remover realizes the static ash removing the service lifetime is evidently prolonged at the same time the impulse blowing device is saved because that the pressure of the back flushing air current is stable and the tensioned filter bag holds still in the ash removing. The ash removing method comprise the following procedures: first blowing in the pressure-stable back flushing air current to the filter bag; and cutting off the back flushing air current after lasting a predetermined time. The external filtering bag type dust remover and the dust removing method thereof can guarantee that the filter bag is not damaged in the ash removing and prolong the service lifetime of the filter bag.
Description
Technical field
The present invention relates to a kind of deduster, particularly relate to a kind of exterior sieve type bag-type dust remover.The invention still further relates to the method for exterior sieve type bag-type dust remover being carried out reverse gas cleaning.
Background technology
At present, sack cleaner is widely used in purifying the dusty gases that industry produced such as metallurgy, mine, chemical industry, cement, generating, grain processing in industry.
The operation principle of sack cleaner is dusty gas to be introduced deduster and make it see through the filter bag of being located in the deduster, and grit promptly is blocked and stays the filter bag surface, forms a dust layer.Pure air then flows out deduster by filter bag smoothly.
Sack cleaner can be divided into two kinds of outside filtering type and inward flow filtration-types according to filtered airflow filtering direction difference.When exterior sieve type bag-type dust remover filtered, filtered airflow was passed filtrate by the filter bag outside and is flowed to filter bag inside, on the outer surface of grit attached to filter bag; When inward flow filtration-type pocket type deduster filtered, filtered airflow was passed filtrate by the filter bag inboard and is flowed to the filter bag outside, on the inner surface of grit attached to filter bag.
After operation a period of time, the dust layer that bag-type duster filtering bag is met the accumulation of dirt surface is more and more thicker, and the drag losses of deduster is increased.Therefore, sack cleaner need carry out deashing after operation a period of time.
Existing exterior sieve type bag-type dust remover purge mode mainly adopt pulse jetting deashing.The pulse jetting deashing mode is that pressure-air is blown into filter bag at a high speed in the of short duration time (being no more than 0.2 second usually), produce and the reverse blowback air-flow of filtered airflow, make to produce pulse expansion shake in the filter bag, the filter bag wall obtains very high outside acceleration, thereby shakes off dust.This mode belongs to dynamic deashing.
The purge mode of above-mentioned pulse jet is that the variation by the filter bag profile comes off the dust layer attached to the filter bag surface.Deformation meeting repeatedly accelerates the fatigue of filter bag, shortens the service life of filter bag significantly but for a long time.Because the cost of filter bag has occupied larger proportion in whole deduster, and the quantity of filter bag is very big, change very inconvenience of filter bag, so the flimsy problem of filter bag seems very outstanding.
The Granted publication of the applicant application number discloses a kind of locellus blowback glass fibre pocket type deduster of pulsing for the utility model patent of CN 2402921Y, described deduster is an exterior sieve type bag-type dust remover, it comprises housing, described housing bottom is provided with flue-dust retainer, and the filter bag of some is installed on the card of described enclosure interior.Described card and described filter bag are separated the dusting air chamber with described housing and are positioned at the air-purifying chamber on described dirt air chamber top.Offer air inlet that is communicated with the dirt air chamber and the gas outlet that is communicated with air-purifying chamber on the described housing.Described air inlet and/or gas outlet are provided with blower fan.The outer surface of described filter bag is positioned at described dirt air chamber, and described filter bag inside is fitted with the bag cage with the filter bag tensioning.Described deduster also comprises flutter valve, in order to make the pulsation blowback air-flow of high frequency, and when needing deashing, the pulsation blowback air-flow of this high frequency is sprayed in the filter bag, shake the adhesive force that destroys between dust layer and the filter bag by a small margin by the high frequency of filter bag, realize deashing.
The filter bag that the disclosed exterior sieve type bag-type dust remover of above-mentioned utility model patent is adopted is by high temperature resistant, corrosion-resistant, stretch-proof but the glass fibre of frangibility is made.In order to prolong the life-span of filter bag, the filter bag inside of described exterior sieve type bag-type dust remover is fitted with the bag cage with the tensioning of filter bag wall.Like this, when deashing, because the filter bag wall keeps tensioning state, under the impact of the pulsation blowback air-flow of high frequency, the amplitude of the deformation that filter bag took place reduces, so the filter bag indefatigability obtains prolonging the service life of filter bag.
Though the disclosed exterior sieve type bag-type dust remover of above-mentioned utility model patent since during deashing the deformation amplitude of filter bag reduce, prolonged its service life; But certain shake still can take place in the filter bag of described sack cleaner under the effect of the pulsation blowback air-flow of high frequency, and its purge mode also belongs to dynamic deashing, and filter bag still can be subjected to certain damage, and its service life is still undesirable.In addition, above-mentioned sack cleaner need be provided with the device of the pulsation blowback air-flow of making high frequency specially, has increased the cost of equipment, has reduced the equipment reliability of operation.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention is to provide a kind of filter bag to have the long lower and reliable exterior sieve type bag-type dust remover of service life, equipment cost.Another technical problem that the present invention will solve provides a kind of method of exterior sieve type bag-type dust remover being carried out reverse gas cleaning.
In order to solve the problems of the technologies described above, exterior sieve type bag-type dust remover provided by the invention, comprise casing, described box house flatly is provided with card, described card fixed installation filter bag, the inner plug-in mounting of described filter bag is used for the bag cage of the described filter bag of tensioning, described card and described filter bag are separated the dusting air chamber with described casing and are positioned at the air-purifying chamber on described dirt air chamber top, offer air inlet that is communicated with described dirt air chamber and the gas outlet that is communicated with described air-purifying chamber on the described casing, described gas outlet connects air-introduced machine, and described exterior sieve type bag-type dust remover provides the blowback mechanism of the blowback air-flow of pressure stability when further being included in deashing.
Preferably, described blowback mechanism comprises the blowback air circulation road that is arranged in the described casing, described blowback air circulation road comprises a blind end and a source of the gas end, described source of the gas end connects the source of the gas of blowback air-flow, the bottom of described air-purifying chamber is divided at least two bag chambers, described bag chamber is a sidewall with the dividing plate that is fixedly connected on described card upper surface vertically, described bag chamber is a base plate with described card, fixing at least two filter bags on the base plate of each bag chamber, one sidewall of described bag chamber is offered the blowback valve that is communicated with described blowback air circulation road, and the top board of described bag chamber is offered Filter valve.
Preferably, the source of the gas end of described blowback air circulation road is communicated with outside air, and the source of the gas end of described blowback air circulation road is provided with heater, is used for entering the outside air heating of described blowback air circulation road.
Preferably, the source of the gas end of described blowback air circulation road is communicated with the gas outlet of described air-introduced machine.
Preferably, the source of the gas end of described blowback air circulation road is communicated with back blowing machine.
Preferably, described bag of chamber is distributed in described blowback air circulation road both sides.
Preferably, described blowback mechanism further comprises the chamber-dividing counter-blowing valve system, described chamber-dividing counter-blowing valve system comprises two sprocket wheels that are horizontally disposed with and are articulated in described blowback air circulation road two ends by rotating shaft, described sprocket wheel is rotation and the rotation of drive driving-chain under external force drives, described driving-chain fixedly mounts first shifting block and second shifting block, described first shifting block and second shifting block be the interval preset distance on described driving-chain, sprocket rotation during reverse gas cleaning, described first shifting block and second shifting block are stirred drive disk assembly, described drive disk assembly and described blowback valve and Filter valve interlock.
Preferably, described drive disk assembly comprises a centre rotational axis, fixedly mount four first transmission arms mutual vertically around described centre rotational axis, further fixedly mount two second transmission arms symmetrically around described centre rotational axis, thereby described first shifting block and second shifting block drive described drive disk assembly and rotate around described centre rotational axis by stirring described first transmission arm, the valve plate interlock of the centre rotational axis of described drive disk assembly and described blowback valve, the valve block interlock of described second transmission arm and described Filter valve.
Preferably, described air inlet is arranged on the side of described casing, and described filter bag is the flat bag with two sidewalls that parallel, and described filter bag is matrix form to be arranged, and forms the passage towards described air inlet between corresponding two sidewalls of adjacent two filter bags.
Preferably, described air inlet further is provided with the airflow uniform distribution plate.
Preferably, described exterior sieve type bag-type dust remover further comprises the bypass channel that is communicated with described air inlet and gas outlet, on the described bypass channel stop valve is set.
Preferably, two stop valves are set on the described bypass channel, the passage that is communicated with outside air is set on the bypass channel between described two stop valves.
Ash removal method provided by the invention is used for exterior sieve type bag-type dust remover is carried out deashing, and plug-in mounting comprises the steps: the bag cage of described filter bag tensioning in the filter bag of described exterior sieve type bag-type dust remover
(1) be blown into the blowback air-flow that flows to described filter bag outside through filter bag in described filter bag, it is stable that the pressure of described blowback air-flow keeps;
(2) described blowback air-flow continues the scheduled time, cuts off described blowback air-flow.
Preferably, the pressure of blowback air-flow is 2000 handkerchief to 10000 handkerchiefs in the described step (1).
Preferably, the time that the blowback air-flow continues in the described step (2) is 8 seconds to 18 seconds.
Owing to replaced the pulsation blowback air-flow of high frequency during deashing with the blowback air-flow of pressure stability, and in the filter bag plug-in mounting with filter bag tensioning bag cage, filter bag can keep transfixion when deashing, like this, filter bag does not almost sustain damage during deashing, and the life-span of filter bag is significantly improved.Simultaneously, replaced the pulsation blowback air-flow of high frequency during deashing with the blowback air-flow of pressure stability, therefore just can omit the device of the pulsation blowback air-flow of making high frequency, simplified equipment, reduced cost, and improved the equipment reliability of operation.
Description of drawings
Fig. 1 is the structure chart of first kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention;
Fig. 2 is the partial enlarged drawing of I position among Fig. 1;
The deashing principle schematic that Fig. 3 is adopted for the described exterior sieve type bag-type dust remover of the embodiment of the invention;
Fig. 4 is the structure chart of the blowback mechanism in second kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention;
Fig. 5 is the cutaway view along A-A hatching among Fig. 4;
Fig. 6 is the structure chart of the chamber-dividing counter-blowing valve system in the third specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention;
Fig. 7 is the structure chart of the drive disk assembly in the 4th kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention;
Fig. 8 is the schematic diagram of the bonding state of transmission mechanism shown in Figure 7 and blowback valve;
Fig. 9 is the structure chart of the Filter valve in the 4th kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention;
Figure 10 is the schematic diagram of airflow direction in filter bag shape, arrangement and the dirt air chamber in the 5th kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention;
Figure 11 is the flow chart of ash removal method of the present invention.
The specific embodiment
Core of the present invention provides a kind of filter bag and has long lower and reliable exterior sieve type bag-type dust remover and the ash removal method thereof of life-span, equipment cost.
In order to make those skilled in the art person understand the solution of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, this figure is the structure chart of first kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention.As shown in Figure 1, described exterior sieve type bag-type dust remover comprises casing 2, and casing 2 is made by metal material usually.The bottom of casing 2 is supported by support 3, and support 3 is steelframe normally.The bottom of casing 2 is provided with flue-dust retainer 4, and it also can be a plurality of that flue-dust retainer 4 can be one.
Please refer to Fig. 2 simultaneously, Fig. 2 is the partial enlarged drawing of I position among Fig. 1.The internal water level land of casing 2 is provided with card 5, and card 5 is offered a plurality of plate holes.As shown in Figure 2, card 5 fixedly connected a plurality of filter bags 6.Be provided with packing ring 53 between the sack of filter bag 6 and the card 5.Packing ring 53 specifically can be selected for use and filter bag 6 identical materials.Can further packing ring 53 be fixedlyed connected with the sack of filter bag 6, be one such as both are sewed up.The edge that hold down gag 56 is pressed abd fixed on card 5 plate holes by sack blank holder 52 with the sack and the packing ring 53 of filter bag 6.Filter bag 6 inner plug-in mountings make the bag cage 61 of filter bag tensioning, and bag cage 61 has the high density strong point.Particularly, the weight of bag cage 61 can all be born by filter bag 6; Also can bear jointly by card 5 and filter bag 6.Can adjust the length of filter bag 6 with respect to bag cage 61, the tensioning degree on the surface of filter bag 6 can change thus.
Please refer to Fig. 1, card 5 and filter bag 6 are separated into upper and lower two chambers with casing 2, and what be positioned at the bottom is dirt air chamber 7, and superposed is air-purifying chamber 8.The outer surface of filter bag 6 is towards dirt air chamber 7, and its inner surface is towards air-purifying chamber 8.Further offer air inlet 9 and gas outlet 10 on the casing 2, air inlet 9 is communicated with dirt air chamber 7, and gas outlet 10 is communicated with air-purifying chamber 8.Gas outlet 10 connects air-introduced machine.Air inlet 9 and gas outlet 10 all can be provided with stop valve.Described exterior sieve type bag-type dust remover further comprises blowback mechanism 11, is used for described exterior sieve type bag-type dust remover is carried out reverse gas cleaning.The blowback air-flow that blowback mechanism 11 provides is the stable air-flow of low pressure, and the air-flow that this low pressure is stable flows to dirt air chamber 7 from the filter bag 6 inner filter bags that see through.
When described exterior sieve type bag-type dust remover was in the filtration state, under the drainage of the air-introduced machine that is positioned at gas outlet 10, whole deduster inside all was negative pressure state.The filtered airflow that comprises grit enters dirt air chamber 7 from air inlet 9 under atmospheric effect.Stopped by the outer surface of filter bag 6 during grit process filter bag 6, the filtered airflow of having removed grit then enters in the filter bag 6, and then enters air-purifying chamber 8.The clean gas that filters through each filter bag 6 collects in the air-purifying chamber 8 and 10 outflows from the gas outlet then.The flow path that is filtered airflow be by air inlet 9 to dirt air chamber 7, see through filter bag 6 again and enter air-purifying chamber 8,10 flow out from the gas outlet at last.So just realized filtration to dusty gas.
Contrast the deashing principle of the described exterior sieve type bag-type dust remover of the DESCRIPTION OF THE PRIOR ART embodiment of the invention below.
The exterior sieve type bag-type dust remover of prior art is to cause filter bag 6 to shake by the deashing air-flow, relies on inertia force to realize separating of dust layer and filter cloth, thereby realizes deashing.This mode filter bag 6 when deashing must move, and is called " dynamically deashing ".The exterior sieve type bag-type dust remover that adopts dynamic deashing principle is when deashing, and its filter bag 6 will inevitably move back and forth not stopping pregnancy and give birth to deformation, and the life-span of filter bag 6 will inevitably significantly reduce.
The described exterior sieve type bag-type dust remover of the embodiment of the invention has adopted diverse deashing principle.Please refer to Fig. 3, the deashing principle schematic that Fig. 3 is adopted for the described exterior sieve type bag-type dust remover of the embodiment of the invention.As shown in Figure 3, the active force that the grit P before deashing among the dust layer L2 mainly is subjected to has: filtered airflow pressure f in the horizontal direction and the support force N of filter layer of cloth L1, the adhesion F of in the vertical direction and gravity G.The mutual balance of holding power N of filtered airflow pressure f and filter layer of cloth L1, adhesion F and the mutual balance of gravity G.As seen dust layer L2 overcomes self gravitation G with attached to filter layer of cloth L1 surface by adhesion F.Realize deashing, will break the stress balance state of dust layer L2.Specifically, to destroy the adhesion F of dust layer L2 exactly.
When the stable blowback air-flow of low pressure see through internally be in the filter bag of tensioning state after, can between the dust layer L2 of filter bag outer surface and filter layer of cloth L1, form a gasification layer, it is loose Powdered that dust in the described gasification layer is, thereby greatly reduce adhesion F between dust layer L2 and the filter layer of cloth L1, dust layer L2 under the effect of self gravitation G, with the downward landing of form of a large amount of dirt cakes, dirt piece to flue-dust retainer.
In whole deashing process, because filter bag 6 is tensioned and the blowback air flowing pressure is stable, filter bag 6 keeps static, and this purge mode is called " static deashing ".
The deashing process of the described exterior sieve type bag-type dust remover of the embodiment of the invention is described below.
When the exterior sieve type bag-type dust remover of the described first kind of specific embodiment of the invention described above embodiment needed deashing, described blowback mechanism 11 was blown into the stable blowback air-flow of low pressure that continues the scheduled time in needs carry out the filter bag 6 of deashing.The described scheduled time specifically can be 8 seconds to 18 seconds.The pressure of described blowback air-flow is a little more than the pressure of dusty gas in the dirt air chamber 7, and both pressure differentials specifically can be that 2000 handkerchiefs are to 10000 handkerchiefs.After described blowback air-flow sees through and to be in the filter bag 6 of tensioning state, between the dust layer of filter bag 6 outer surfaces and filter layer of cloth, form a gasification layer, and destroy adhesion between the two.The dust layer of filter bag 6 outer surfaces immediately under the effect of self gravitation landing downwards to flue-dust retainer 4.
The exterior sieve type bag-type dust remover of the described first kind of specific embodiment of the embodiment of the invention is compared with the exterior sieve type bag-type dust remover of prior art, because filter bag 6 is in tensioning state, add the blowback air flowing pressure keep stable and pressure lower, filter bag 6 is accomplished transfixion during deashing.Like this, filter bag 6 does not almost sustain damage during deashing, and be significantly improved the service life of filter bag 6.Simultaneously, replaced the pulsation blowback air-flow of prior art medium-high frequency during deashing with the stable blowback air-flow of low pressure, therefore just can omit the device of the pulsation blowback air-flow of making high frequency, simplified apparatus reduces the cost, and improves the equipment reliability of operation.
In addition, deduster in the past is because the blowback air-flow adopts the pulse pneumatic of high frequency, this blowback air-flow duration is very short, can cause so the dust that come off as yet fully sedimentation promptly with filtered airflow once more attached on filter bag 6 or the adjacent filter bag 6, cause second adsorption; The described exterior sieve type bag-type dust remover of this specific embodiment comes deashing by the blowback air-flow that continues the long period, and the dust that comes off has time enough to fall into flue-dust retainer 4, has so just avoided the phenomenon of above-mentioned second adsorption, and ash-removal effect is significantly improved.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structure chart of the blowback mechanism in second kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention, and Fig. 5 is the cutaway view along A-A hatching among Fig. 4.
As shown in Figure 4 and Figure 5, the described exterior sieve type bag-type dust remover of this specific embodiment is on the basis of above-mentioned first kind of specific embodiment, and further portion flatly is provided with blowback air circulation road 12 within it, and the section of blowback air circulation road 12 specifically can be square.Blowback air circulation road 12 have blind end 121 and a source of the gas end 122, source of the gas end 122 connects the source of the gas of the blowback air-flow of pressure stabilitys, the pressure of described blowback air-flow is a little more than the pressure of dusty gas in the dirt air chamber 7.The bottom of the air-purifying chamber 8 of described exterior sieve type bag-type dust remover is provided with a plurality of bags of chambers 13, and a bag chamber 13 is a base plate with card 5, and is sidewall with the dividing plate 51 that is fixedly connected on vertically on the card 5.A wherein sidewall of bag chamber 13 is offered the blowback valve 15 that is communicated with blowback air circulation road 12, and the top board of bag chamber 13 is offered the Filter valve 14 that is communicated with air-purifying chamber 8.Filter valve 14 and blowback valve 15 are conventional stop valve.Filter valve 14 specifically can be selected the venetian blind type valve that can be easy to open and close and occupy less space for use.
When described exterior sieve type bag-type dust remover was in the filtration state, the Filter valve 14 of bag chamber 13 was opened, and the blowback valve 15 of bag chamber 13 is closed.Filtered airflow enters bag chamber 13 from dirt air chamber 7, enters air-purifying chamber 8 then.
When described exterior sieve type bag-type dust remover deashing, the Filter valve 14 that needs the bag chamber 13 of deashing is closed and the blowback valve 15 of same bag chamber 13 is opened.The blowback air-flow enters bag chamber 13 from blowback air circulation road 12, enters then through filter bag 6 and enters dirt air chamber 7.So just realized chamber-dividing counter-blowing deashing to described exterior sieve type bag-type dust remover.
Blowback mechanism in this specific embodiment, open and close the filtration state of realizing each bag chamber 13 and the switching between the reverse gas cleaning state by Filter valve 14 and blowback valve 15 with matching, all can the filtration of other bags chamber 13 not exerted an influence during any one bag chamber 13 deashings, it is simple in structure, and operation is also convenient.The source of the gas end 122 of the blowback air circulation road 12 in the above-mentioned blowback mechanism directly can be communicated with outside air.Under the effect of the air-introduced machine that is connected with air outlet 10, described exterior sieve type bag-type dust remover inside is negative pressure, so 122 direct the connections with outside air of source of the gas end of blowback air circulation road 12 can form the blowback air-flow in blowback air circulation road 12.Can be further heater be set, in order to will flow into blowback air circulation road 12 air heat at the source of the gas end 122 of blowback air circulation road 12.To heat in advance as the outside air of blowback air-flow, can avoid effectively the dewfall phenomenon in described exterior sieve type bag-type dust remover, occurring because outside air temperature is lower.
The source of the gas end 122 of the blowback air circulation road 12 in the above-mentioned blowback mechanism can be communicated with the outlet of the air-introduced machine that is connected air outlet 10.The pressure of the gas through purifying in the exit of the air-introduced machine of connection air outlet 10 is a little more than atmospheric pressure, so can be used as the source of the gas of blowback air-flow.Simultaneously, owing to the temperature of temperature that exports the gas through purifying that flows out from air-introduced machine and described exterior sieve type bag-type dust remover internal gas is basic identical, so do not need to establish in addition heater.
Can be further the source of the gas end 122 of blowback air circulation road 12 be connected standby back blowing machine.When described exterior sieve type bag-type dust remover ran into fault and needs the blowback air-flow of elevated pressures, described back blowing machine started, and was blown into the blowback air-flow of elevated pressures in blowback air circulation road 12.
Certainly, also can be not the bottom of described air-purifying chamber 8 be divided into a plurality of bags of chambers 13, promptly whole sack cleaner only is provided with one group of Filter valve 14 and blowback valve 15.This equally also can realize the effect of blowback mechanism, but will expend a large amount of blowback air-flows and can't realize online ash removal.
As everyone knows, the blowback mechanism that existing exterior sieve type bag-type dust remover adopted can have multiple different concrete form, and no matter adopting is the blowback mechanism of which kind of form, and the blowback air-flow that it provides is the pulsation blowback air-flow of high frequency.Different therewith, the blowback air-flow that blowback of the present invention mechanism is provided is the blowback air-flow of pressure stability.A kind of concrete form of above-mentioned Fig. 4, the blowback air-flow that only adopts for the present invention shown in Figure 5, the present invention can also adopt other forms, as long as it can provide the blowback air-flow of pressure stability.Such as, in another kind of concrete form, blowback mechanism is included in the turning arm that can horizontally rotate of the sack top setting of filter bag 6, and described turning arm inside has the blowback air of connection gas source channels, and described passage is offered a plurality of air outlets towards filter bag 6.Correspondingly filter bag 6 being arranged on described turning arm is the below of the periphery of radius, while described turning arm rotates to filter bag 6 inside and is blown into the blowback air-flow during deashing.
Please refer to Fig. 6, Fig. 6 is the structure chart of the chamber-dividing counter-blowing valve system in the third specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention.
The described exterior sieve type bag-type dust remover of this specific embodiment on the basis of above-mentioned second kind of specific embodiment, further comprises the chamber-dividing counter-blowing valve system.As shown in Figure 6, described chamber-dividing counter-blowing valve system comprises at least two sprocket wheels 17, and sprocket wheel 17 flatly is journaled into the two ends of blowback air circulation road 12 respectively by rotating shaft.Sprocket wheel 17 rotates under the driving of drive unit, such as being rotated counterclockwise.When needing deashing, can manually or by automatic control system open described drive unit, with drive sprocket 17 rotations.Driving driving-chain 18 during sprocket wheel 17 rotations moves.Driving-chain 18 fixed installation first shifting blocks 19 and second shifting block, 20, the first shifting blocks 19 and second shifting block 20 protrude described driving-chain 18, and both space certain distances on the transmission direction of driving-chain 18 are installed.
First shifting block 19 is opened the blowback valve 15 of each bag chamber 13 successively by drive disk assembly 16 during reverse gas cleaning under the drive of driving-chain 18, and the Filter valve 14 of closing respective bag chamber 13 successively simultaneously.This moment, described bag chamber 13 was communicated with blowback air circulation road 12, and was separated by Filter valve 14 and air-purifying chamber 8.Blowback air in the blowback air circulation road 12 blowback valve 15 of flowing through is blown in bag chamber 13, and then it is inner and see through filter bags 6 and enter in the dirt air chamber 7 to be blown into filter bag 6.Filter bag 6 promptly is in the reverse gas cleaning state.Through after the preset time, second shifting block 20 is closed the described blowback valve of being opened by first shifting block 19 15 successively by drive disk assembly 16, and opens described Filter valve 14 of being closed by first shifting block 19 simultaneously successively.This moment, bag chamber 13 was communicated with by Filter valve 14 with air-purifying chamber 8, and separate by blowback valve 15 and blowback air circulation road 12, filter bag 6 in this bag chamber 13 recovers the filtration state, and filtered airflow sees through filter bag 6 from dirt air chamber 7 and enters bag chamber 13, and enters air-purifying chamber 8 via Filter valve 14.Filter bag 6 promptly from the reverse gas cleaning recovering state to the filtration state.Described first shifting block 19 and second shifting block 20 move with driving-chain 18, just realized to each bag chamber 13 by the chamber reverse gas cleaning.
When first shifting block 19 or second shifting block 20 move when a week getting back to original position with driving-chain 18, can the described drive unit of manual-lock.Can also further on the path of described first shifting block 19 or 20 motions of second shifting block, the travel switch touch panel 21 that control sprocket wheel 17 rotates and stops to be set, when described first shifting block 19 or second shifting block 20 rotate when a week getting back to original position with driving-chain 18, described first shifting block 19 or second shifting block 20 are stirred described travel switch touch panel 21, and sprocket wheel 17 stops operating.
Can adjust the time that each bag chamber 13 is in the reverse gas cleaning state by the distance between described first shifting block 19 of adjustment and second shifting block 20 and the rotating speed of sprocket wheel 17.Generally, dust layer comes off and falls into flue-dust retainer 4 afterwards corresponding filter bags 6 and just recovers the filtration state, can prevent effectively as yet that like this dust of not sedimentation is attached to filter bag 6 outer surfaces once more with filtered airflow, improves cleaning efficiency.
The chamber-dividing counter-blowing mechanism structure of the described exterior sieve type bag-type dust remover of this specific embodiment is simple, easy to operate, and owing to adopted chaindriven mode, therefore described exterior sieve type bag-type dust remover inside can be provided with more bag chamber 13, the blowback air flow rate can significantly reduce, the maximization of easier realization deduster.
Please refer to Fig. 7, Fig. 7 is the structure chart of the drive disk assembly in the 4th kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention.This specific embodiment further is made as drive disk assembly 16 structure as shown in Figure 7 on the basis of above-mentioned the third specific embodiment.
Drive disk assembly 16 comprises the centre rotational axis 161 that articulates with bag chamber 13.Fixedly mount four first transmission arms 162 equably around centre rotational axis 161.Below four first transmission arms 162, can further fixedly mount two second coaxial transmission arms 163 around centre rotational axis 161.Under the drive of driving-chain 18, first shifting block 19 and second shifting block 20 are stirred first transmission arm 162 successively and then are stirred drive disk assembly 16, it is revolved respectively around centre rotational axis 161 turn 90 degrees.Drive disk assembly 16 and Filter valve 14 and 15 interlocks of blowback valve are to realize opening or closing described Filter valve 14 and blowback valve 15.
Please refer to Fig. 8, Fig. 8 is the schematic diagram that is in bonding state of transmission mechanism shown in Figure 7 and blowback valve.
As shown in Figure 8, blowback valve 15 specifically can comprise valve plate 151 and valve buckle 152, and valve plate 151 is fixedlyed connected with described centre rotational axis 161.Can further valve plate 151 left-right symmetry be fixed on centre rotational axis 161 both sides.Under the stirring of first shifting block 19 or second shifting block 20, the centre rotational axis 161 of transmission mechanism 16 revolves and turn 90 degrees, and the valve plate 151 of blowback valve 15 revolves thereupon and turn 90 degrees and then realize opening or closure of blowback valve 15.
Please refer to Fig. 9, Fig. 9 is the structure chart of the Filter valve in the 4th kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention.
As shown in Figure 9, Filter valve 14 specifically can comprise push rod 141, and push rod 141 is connected on the pedestal 142 of Filter valve 14 slidably.Push rod 141 further fixedly connected horizontally disposed mobile frames 143, and can promote mobile frame 143 and move along pedestal 142 upper surfaces.Two crossbeams that mobile frame 143 is parallel to its moving direction all fixedly mount a plurality of connecting keys 146.Filter valve 14 also comprises a plurality of connecting rods 145.Connecting rod 145 comprises stiff end and movable end.Pedestal 142 articulates the stiff end of connecting rod 145 by bearing pin 147.The movable end of connecting rod 145 is offered groove, and the connecting key 146 on the described crossbeam flexibly connects by the movable end of described groove and connecting rod 145.Filter valve 14 further comprises a plurality of valve blocks 144 that can rotate around its rotating shaft, and connecting rod 145 is fixedlyed connected with the rotating shaft of valve block 144.
Drive disk assembly 16 is stirred by first shifting block 19 or second shifting block 20 and is revolved when turning 90 degrees, the centre rotational axis 161 of drive disk assembly 16 drives second transmission arm 163 and rotates 90 degree, the push rod 141 of second transmission arm 163 thereby promotion Filter valve 14, and then it is laterally mobile along pedestal 142 upper surfaces to promote mobile frame 143.Connecting rod 145 rotates around bearing pin 147 under the drive of mobile frame 143, and then drives described valve block 144 rotations, thereby realizes opening or closing of Filter valve 14.Rotate 90 once more when spending when the centre rotational axis 161 of drive disk assembly 16 drives described second transmission arm 163, mobile frame 143 moves in the opposite direction under the effect of reset components and sets back, and realizes closing or opening of Filter valve 14.Described reset components specifically can be the helical spring that is provided with around described push rod.
The described exterior sieve type bag-type dust remover of this specific embodiment has adopted transmission mechanism as described in Figure 7, this transmission mechanism simple in structure, and driving-chain 17, Filter valve 14 and 15 interlocks of blowback valve can realize the filtration state of each bag chamber 13 and the conversion between the deashing state easily.
Please refer to Figure 10, Figure 10 is the schematic diagram of filtered airflow direction in filter bag shape, filter bag arrangement and the dirt air chamber in the 5th kind of specific embodiment of the described exterior sieve type bag-type dust remover of the embodiment of the invention.
Air inlet 9 is arranged on the side of described casing 2 in this specific embodiment, and filtered airflow enters dirt air chamber 7 from the side of filter bag 6.As shown in figure 10, filter bag is selected the flat bag with two sidewalls that parallel 61,62 for use.Filter bag 6 is matrix form to be arranged, and forms the passage towards air inlet 9 between corresponding two sidewalls 61,62 of adjacent two filter bags 6.Be the flow direction of filtered airflow in dirt air chamber 7 among Figure 10 shown in the arrow.
In addition, filter bag 6 is matrix form and arranges, and form passage between corresponding two sidewalls 61,62 of adjacent two filter bags 6, help like this entering dirt air chamber 7 and evenly distribution dirt air chamber 7 along described passage from the filtered airflow that air inlet 9 enters towards described air inlet 9.Dirt air chamber 7 inner filtration air-flow velocities are lower and even, help the sedimentation of dust, also avoided simultaneously because of part filter bag 6 that filtered airflow causes near part filter bag 6 lumped scours the air inlet 9 problem faster of wearing and tearing.
The air inlet 9 of described outside filtering type deduster can further be provided with airflow uniform distribution plate 91, so that it is more even to enter the distribution of filtered airflow of described dirt air chamber 7.
The air inlet 9 of exterior sieve type bag-type dust remover of the present invention and gas outlet 10 directly can be communicated with by bypass channel, and in described bypass channel, stop valve be set.When running into the dusty gas temperature that enters described exterior sieve type bag-type dust remover from air inlet 9 and cross high abnormal conditions, the stop valve of described exterior sieve type bag-type dust remover air inlet 9 and gas outlet 10 is closed, stop valve in the described bypass channel is opened, dusty gas directly flows out described exterior sieve type bag-type dust remover by bypass channel, has avoided filter bag or other structures to sustain damage.
Can in the further above-mentioned bypass channel two stop valves be set, and on the bypass channel between described two stop valves, offer passage.Described air-introduced machine is connected with gas outlet 10, is negative pressure state under the normal condition in the whole system.Directly with atmosphere be communicated with owing to described passage this moment; air in the described passage is malleation with respect to the gas in the described bypass duct; outside air flows into described passage; and the slit of two stop valves in described bypass duct enters in the bypass duct; so just avoided the dusty gas in the bypass duct to leak to the external world, helped the raising of efficiency of dust collection and the protection of environment by the slit of stop valve.
Can further many playscripts with stage directions be invented described exterior sieve type bag-type dust remover and be provided with side by side, can realize the maximization of deduster like this, satisfy the dedusting demand of different scales.
Please refer to Figure 11, Figure 11 is the flow chart of ash removal method of the present invention.Plug-in mounting bag cage 61 in the filter bag 6 of described exterior sieve type bag-type dust remover, the gravity of described bag cage 61 is all or part of to be born by described filter bag 6, and described like this bag cage 61 is with described filter bag 6 tensionings.
As shown in figure 11, method of exterior sieve type bag-type dust remover being carried out deashing provided by the invention, comprise the steps: that (S1) closes Filter valve 14 and open blowback valve 15, be blown into pressure by blowback air circulation road 12 in filter bag 6 and keep stable blowback air-flow, described blowback air-flow flows to the outside of filter bag 6 through filter bag 6; (S2) keep described blowback air-flow,, close blowback valve 15, above-mentioned blowback air-flow is cut off through after the scheduled time.
The process above-mentioned steps can realize the reverse gas cleaning to described exterior sieve type bag-type dust remover.Open Filter valve 14 this moment and recover above-mentioned cut filtered airflow, described exterior sieve type bag-type dust remover can recover the filtration state.
Method of exterior sieve type bag-type dust remover being carried out reverse gas cleaning provided by the invention, the air-flow that utilizes pressure stability carries out reverse gas cleaning to the filter bag 6 of exterior sieve type bag-type dust remover, add filter bag 6 and be in tensioning state, filter bag 6 can keep inactive state during deashing, do not produce deformation, therefore filter bag 6 is not fragile, obtains significant prolongation its service life.Method provided by the invention has replaced the pulsation blowback air-flow of prior art medium-high frequency with the blowback air-flow of pressure stability, so just can omit the pulsation blowing device, has simplified equipment, has reduced cost, and has improved the equipment reliability of operation.
Above-mentioned blowback air-flow specifically can be that pressure is the low-pressure air current of 2000 handkerchief to 10000 handkerchiefs.
The above-mentioned scheduled time specifically can be 8 seconds to 18 seconds.
More than be described in detail to exterior sieve type bag-type dust remover provided by the present invention and to its method of carrying out deashing.This paper has used specific case principle of the present invention and embodiment has been set forth, and the explanation of above embodiment just is used for helping to understand the present invention and core concept thereof.Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (15)
1, a kind of exterior sieve type bag-type dust remover, comprise casing, described box house flatly is provided with card, described card fixed installation filter bag, the inner plug-in mounting of described filter bag is used for the bag cage of the described filter bag of tensioning, described card and described filter bag are separated the dusting air chamber with described casing and are positioned at the air-purifying chamber on described dirt air chamber top, offer air inlet that is communicated with described dirt air chamber and the gas outlet that is communicated with described air-purifying chamber on the described casing, described gas outlet connects air-introduced machine, it is characterized in that described exterior sieve type bag-type dust remover provides the blowback mechanism of the blowback air-flow of pressure stability when further being included in deashing.
2, exterior sieve type bag-type dust remover as claimed in claim 1, it is characterized in that, described blowback mechanism comprises the blowback air circulation road that is arranged in the described casing, described blowback air circulation road comprises a blind end and a source of the gas end, described source of the gas end connects the source of the gas of blowback air-flow, the bottom of described air-purifying chamber is divided at least two bag chambers, described bag chamber is a sidewall with the dividing plate that is fixedly connected on described card upper surface vertically, described bag chamber is a base plate with described card, fixing at least two filter bags on the base plate of each bag chamber, one sidewall of described bag chamber is offered the blowback valve that is communicated with described blowback air circulation road, and the top board of described bag chamber is offered Filter valve.
3, exterior sieve type bag-type dust remover as claimed in claim 2, it is characterized in that, the source of the gas end of described blowback air circulation road is communicated with outside air, and the source of the gas end of described blowback air circulation road is provided with heater, is used for entering the outside air heating of described blowback air circulation road.
4, exterior sieve type bag-type dust remover as claimed in claim 2 is characterized in that, the source of the gas end of described blowback air circulation road is communicated with the gas outlet of described air-introduced machine.
5, exterior sieve type bag-type dust remover as claimed in claim 2 is characterized in that, the source of the gas end of described blowback air circulation road is communicated with back blowing machine.
6, exterior sieve type bag-type dust remover as claimed in claim 2 is characterized in that, described bag chamber is distributed in described blowback air circulation road both sides.
7, exterior sieve type bag-type dust remover as claimed in claim 6, it is characterized in that, described blowback mechanism further comprises the chamber-dividing counter-blowing valve system, described chamber-dividing counter-blowing valve system comprises two sprocket wheels that are horizontally disposed with and are articulated in described blowback air circulation road two ends by rotating shaft, described sprocket wheel is rotation and the rotation of drive driving-chain under external force drives, described driving-chain fixedly mounts first shifting block and second shifting block, described first shifting block and second shifting block be the interval preset distance on described driving-chain, sprocket rotation during reverse gas cleaning, described first shifting block and second shifting block are stirred drive disk assembly, described drive disk assembly and described blowback valve and Filter valve interlock.
8, exterior sieve type bag-type dust remover as claimed in claim 7, it is characterized in that, described drive disk assembly comprises a centre rotational axis, fixedly mount four first transmission arms mutual vertically around described centre rotational axis, further fixedly mount two second transmission arms symmetrically around described centre rotational axis, thereby described first shifting block and second shifting block drive described drive disk assembly and rotate around described centre rotational axis by stirring described first transmission arm, the valve plate interlock of the centre rotational axis of described drive disk assembly and described blowback valve, the valve block interlock of described second transmission arm and described Filter valve.
9, exterior sieve type bag-type dust remover as claimed in claim 1, it is characterized in that, described air inlet is arranged on the side of described casing, described filter bag is the flat bag with two sidewalls that parallel, described filter bag is matrix form to be arranged, and forms the passage towards described air inlet between corresponding two sidewalls of adjacent two filter bags.
10, exterior sieve type bag-type dust remover as claimed in claim 9 is characterized in that, described air inlet further is provided with the airflow uniform distribution plate.
11, exterior sieve type bag-type dust remover as claimed in claim 1 is characterized in that, described exterior sieve type bag-type dust remover further comprises the bypass channel that is communicated with described air inlet and gas outlet, on the described bypass channel stop valve is set.
12, exterior sieve type bag-type dust remover as claimed in claim 11 is characterized in that, two stop valves are set on the described bypass channel, and the passage that is communicated with outside air is set on the bypass channel between described two stop valves.
13, a kind of ash removal method is used for exterior sieve type bag-type dust remover is carried out deashing, and plug-in mounting comprises the steps: the bag cage of described filter bag tensioning in the filter bag of described exterior sieve type bag-type dust remover
(1) be blown into the blowback air-flow that flows to described filter bag outside through filter bag in described filter bag, it is stable that the pressure of described blowback air-flow keeps;
(2) described blowback air-flow continues the scheduled time, cuts off described blowback air-flow.
14, ash removal method as claimed in claim 13 is characterized in that, the pressure of blowback air-flow is 2000 handkerchief to 10000 handkerchiefs in the described step (1).
As ash removal method as described in the claim 13, it is characterized in that 15, the scheduled time that the blowback air-flow continues in the described step (2) is 8 seconds to 18 seconds.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101284091A CN100512922C (en) | 2007-07-05 | 2007-07-05 | Exterior sieve type bag-type dust remover and its ashing method |
| PCT/CN2007/070396 WO2009003344A1 (en) | 2007-07-05 | 2007-08-01 | Dust removal apparatus of outside filter bag type and method for removal of dust from the apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101284091A CN100512922C (en) | 2007-07-05 | 2007-07-05 | Exterior sieve type bag-type dust remover and its ashing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101161330A CN101161330A (en) | 2008-04-16 |
| CN100512922C true CN100512922C (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101284091A Active CN100512922C (en) | 2007-07-05 | 2007-07-05 | Exterior sieve type bag-type dust remover and its ashing method |
Country Status (2)
| Country | Link |
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| CN (1) | CN100512922C (en) |
| WO (1) | WO2009003344A1 (en) |
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| CN105233582B (en) * | 2015-10-09 | 2017-09-26 | 岳波 | A kind of filter bag type deduster with self-loopa deashing device |
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| CN113521899B (en) * | 2021-07-29 | 2023-01-03 | 福建龙净环保股份有限公司 | Ash removal method of bag type dust collector |
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- 2007-08-01 WO PCT/CN2007/070396 patent/WO2009003344A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009003344A1 (en) | 2009-01-08 |
| CN101161330A (en) | 2008-04-16 |
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Denomination of invention: Exterior sieve type bag-type dust remover and its ashing method Effective date of registration: 20131217 Granted publication date: 20090715 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: BEIJING HECHEN ENVIRONMENT ENGINEERING CO., LTD. Registration number: 2013990000987 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model |