CN201658900U

CN201658900U - Pulse bag-type dust remover

Info

Publication number: CN201658900U
Application number: CN2009203126716U
Authority: CN
Inventors: 胡树金
Original assignee: XIANGXIANG MACHINERY FACTORY CO Ltd
Current assignee: XIANGXIANG MACHINERY FACTORY CO Ltd
Priority date: 2009-10-19
Filing date: 2009-10-19
Publication date: 2010-12-01
Anticipated expiration: 2019-10-19

Abstract

The utility model provides a pulse bag-type dust remover which mainly solves the technical problems that the present pulse bag-type dust remover achieves poor dust removing effect, has short service life and can easily cause equipment accidents when being used under the working condition of high temperature. The key points of the technical scheme are as follows: the pulse bag-type dust remover is composed of an air purifying chamber (1), a filtering bag (5), a filtering bag skeleton (4), a filtering bag (6), a spraying and blowing device (8), a dust hopper (9), a bracket (10), a gate valve (11) and a star-shaped rotary valve (12); a Venturi tube is arranged in the dust remover, a supersonic flow nozzle is movably connected on a nozzle tube of the spraying and blowing device (8), the central line of the supersonic flow nozzle is aligned with that of a cloth bag hole, and a ladder-type Venturi tube is adopted. By adopting the supersonic flow nozzle, the ladder-type Venturi tube and the adjustable sealing rotary valve, the pulse bag-type dust remover greatly improves the dust removing effect, prolongs the service life of the filtering bags, widens the using range, enhances the using reliability, reduces the using cost, and can be used under the working condition of high temperature.

Description

Pulsed jet cloth filter

Technical field

The utility model relates to a kind of pulse dust collector.

Background technology

Along with development of modern industry, dust is on the rise to the pollution of environment, administers the pollution of dust, purifies existent environment of people, has become compatriots' common recognition.In order to safeguard the demand of production environment cleaning; must clear up at any time by the place of dirt ash fouling; at present; mostly be to carry out cleaning by the set pulse blowing bag-type dust remover; yet; pulse blowing bag type dust precipitator is in dust removal process; can be at leisure on the filter bag of pulse blowing bag type dust precipitator dirt ash layer by layer on the bonding; accumulate over a long period and promptly can reduce efficiency of dust collection; therefore; regular meeting carries out the dedusting cleaning according to different operating positions to the filter bag surface; so that recover good dust removing effects; the injection system of common employed pulse blowing bag type dust precipitator all is directly to blow to the filter bag inner surface by compressed air by the spout on the winding-up pipe to implement the dedusting of filter bag outer surface is cleared up; both ash-removal effect is poor like this, and it is bad to cause filter bag to be blown easily again, and; the complete machine work that also can give the afterpulse blowing bag-type dust remover brings certain influence, and causes that the dirt ash fouling to peripheral production environment does not reach timely or perfect processing.How improving the deashing ability of sack cleaner, reduce the resistance of sack cleaner, is one of key of guaranteeing the dust pelletizing system reliability service, and simultaneously, various high performance accessory research and development also are the very important parts of system.

Summary of the invention

The purpose of this utility model is to provide a kind of ash-removal effect, long service life, pulsed jet cloth filter that airtight effect is good

The concrete technical scheme that its technical problem that solves the utility model adopts is: it is by comprising that air-purifying chamber 1, filter bag 5 and Filter-bag carcass 4, filter bag 6, blowing device 8, ash bucket 9, support 10, push-pull valve 11 and star rotary valve 12 constitute, Venturi tube is installed in deduster, the mode that the employing activity connects on the blast tube of blowing device 8 is connected with superonic flow nozzzle, and the center line of superonic flow nozzzle is aimed at the center line in cloth bag hole.

The utility model also can be installed Venturi tube on bag filter tubesheet, it is the ladder type Venturi tube of ladder type that described Venturi tube adopts cross sectional shape, and the upper diameter of ladder type Venturi tube is greater than lower diameter, and lower diameter is consistent with the diameter of filter bag.Indoor at filter bag, in the filter bag pure qi (oxygen) take up space and filter bag outward the ratio in the shared space of dirt gas be 0.2～0.45.

The adjustable sealing rotary valve that star rotary valve 12 described in the utility model is constituted by valve rotary valve housing and rotor 23, rotor 23 is provided with rotor slot 24, valve rotary valve housing is provided with charging aperture 21 and discharging opening 25, charging aperture 21 and discharging opening 25 are provided with charging aperture connector 18 and discharging opening connector 19, in rotary valve housing 22, be set with sealing shroud 26, and sealing shroud 26 is for lacking circle shape structure, be provided with the sliding sleeve 28 that survives movingly in the charging aperture 21 on rotary valve housing 22 tops, the bottom of sliding sleeve 28 is contained between sealing shroud 26 and the rotor 23 for the arc shaped engage sleeves.Rotary valve housing 22 walls that also can charging aperture 21 are provided with the adjusting bolt 27 that matches with sliding sleeve 28.Also can dirt-proof boot 29 be arranged at charging aperture 21 places.

Rotary valve housing 22 described in the utility model can adopt casting or welding to make the special-shaped metal structure of air-tightness.Described charging aperture connector 18 and discharging opening connector 19 can adopt flange assembly.The top of described sealing shroud 26 can be orientable square or circular configuration.Described sealing shroud 26 partly is scarce circle structure with the containing of rotor 23.

The utility model and traditional rotary valve relatively have the following advantages: the one, by adopting the supersonic speed drainage nozzles, improved ash-removal effect greatly, and reduced the resistance of injection hole to moment winding-up air-flow, also prolonged the service life of filter bag.

The 2nd, by adopting the ladder type Venturi tube, improved the ash-removal effect of pulsed jet cloth filter, reduced resistance, widened the scope that pulsed jet cloth filter uses, improved the reliability of using.

The 3rd, be the adjustable sealing rotary valve that sealing shroud separates by adopting valve body with subsumption architecture.Sealing shroud can only be changed sealing shroud, and can keep valve body and other structure member, thereby can reduce use cost after reusing repeatedly; And it can guarantee the reasonable clearance between sealing shroud and rotor the long period, can guarantee to have good air-tightness again, and make it to use under worst hot case.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that schematic diagram cuts open in the office of the right TV structure of Fig. 1.

Fig. 3 is the structural representation of traditional rotary valve.

Fig. 4 is the structural representation of adjustable sealing rotary valve.

Among the figure: 1-air-purifying chamber, 2-lift valve, 3-fresh-air duct, 4-Filter-bag carcass, 5-filter bag, the 6-filter bag, 7-top rail, 8-blowing device, 9-ash bucket, the 10-support, 11-push-pull valve, 12-star rotary valve, 16-valve rotary valve housing, 17-housing external member, 18-charging aperture connector, 19-discharging opening connector, 21-charging aperture, 22-rotary valve housing, 23-rotor, 24-rotor slot, 25-discharging opening, the 26-sealing shroud, 27-regulates bolt, 28-sliding sleeve, 29-dirt-proof boot.

The specific embodiment

That the utility model is described in further detail is as follows below in conjunction with embodiment:

Embodiment 1: the utility model is by comprising that air-purifying chamber 1, filter bag 5 and Filter-bag carcass 4, filter bag 6, blowing device 8, ash bucket 9, support 10, push-pull valve 11 and star rotary valve 12 etc. constitute, and Venturi tube is installed in deduster, the mode that the employing activity connects on the blast tube of blowing device 8 is connected with superonic flow nozzzle, and the center line of superonic flow nozzzle is aimed at the center line in cloth bag hole.

The deashing process of general pulsed jet cloth filter is that the injection hole (hole of pipe on boring) of air pulse on the winding-up pipe of being controlled by pulse valve sprays into filter bag with air-flow.Make the hurried expansion of filter bag, when expanding into the limit, and produce very big impact shock, the dust that sticks on the filter bag is peeled off under action of inertia down, fall in the ash bucket.When the injection system of design pulse dust collector, press the size of pulse valve, a pulse valve is wanted 5-16 cloth bag, and that is to say on the winding-up pipe has 5-16 injection hole, and the center (GB is stipulated less than 1.5mm) of cloth bag must be aimed in the empty center of each winding-up.And each injection hole sprays into the flow of cloth bag, necessary unanimity.These two requirements are in the process of product, or the factor that influences in installation process is a lot, so be difficult to realize in the engineering listing.Therefore have a strong impact on the ash-removal effect of filter bag, increased the resistance of deduster.The excessive danger of blowing the rag bag in addition of off-centring, the thing that this neither be rare on engineering.

Superonic flow nozzzle of the present utility model is that the mode that the employing activity connects connects with blast tube, can be according to the hole on the pipe of jetting and the position in cloth bag hole, and Field adjustment makes the center line in the center line aligning cloth bag hole of superonic flow nozzzle.Guarantee that the vertical injection of compressed air energy enters the center of filter bag.Solved the injection hole deflection, the off-centre phenomenon of air-flow.Adopt the injection system of superonic flow nozzzle and the directly comparison of perforate on the winding-up pipe, improved ash-removal effect greatly, reduced the resistance of injection hole, also prolonged the service life of filter bag moment winding-up air-flow.Adopt superonic flow nozzzle can design the tolerance unanimity of assurance on demand to each filter tip ejection.This is because superonic flow nozzzle has adopted the spout of hyperbolic configuration.The unevenness that sprays into each filter bag tolerance is smaller or equal to about 10%.The deashing that can guarantee each filter bag is basically identical as a result.Compare with the structure that does not adopt superonic flow nozzzle, improved the ash-removal effect of filter bag widely, reduced the resistance of equipment.Consult Fig. 1 and Fig. 2.

Embodiment 2: the utility model also can be installed Venturi tube on bag filter tubesheet, it is the ladder type Venturi tube of ladder type that described Venturi tube adopts cross sectional shape, the upper diameter of ladder type Venturi tube is greater than lower diameter, and lower diameter is consistent with the diameter of filter bag.

Venturi tube is an important auxiliary equipment of pulsed jet cloth filter, and the vertical sectional shape of traditional Venturi tube approaches the x shape of a small letter.The cage that more common Venturi tube is mounted under the card of pulsed jet cloth filter is intraskeletal.Adopting the purpose of Venturi tube on pulse dust collector is to keep the pressure of winding-up, the air-flow of diffusion is put together, make the bottom of Venturi tube form maximum forced draft, and effectively the pressure of deashing is sent to the bottom of filter bag, to reach the purpose of deashing

Traditional Venturi tube is used on engineering, has certain problem, one: it is following that Venturi tube is imbedded card, make to be about 300? the filter bag of the height of 00mm can't deashing.Has the filter area that is to say each filter bag reality lacked 300? 00 high area.Its two: traditional Venturi tube induce tolerance with the winding-up compressed-air actuated ratio only be 2: 1, if do not adorn Venturi tube, its tolerance of inducing can reach 6 with the ratio of winding-up air supply: 1. three, because traditional Venturi tube has mechanism's (diameter is littler than importing and exporting) of being Hou Kou, make and purify later air-flow again through filter bag, when entering Venturi tube necking down position, the drag overall of deduster is increased.Because traditional Venturi tube exists above-mentioned problem, therefore, when on engineering, designing injection system, often tend to select bigger pulse valve to substitute the effect of Venturi tube.Like this, will increase investment cost and operating cost.In order to address this problem,, to change the vertical sectional shape of traditional Venturi tube into ladder type, and cancelled marquis's mouth necking down structure from the deashing principle of pulsed jet cloth filter.Become the Venturi tube of novel ladder type.The ladder type Venturi tube is mounted in above the card.The winding-up air-flow of traditional Venturi tube sprays into end bag, and then reflexes on the filter bag wall.The pressure of air-flow descends to some extent because of the reason of resistance, has influenced the ash-removal effect of filter bag.

Because of the cross sectional shape of Venturi tube of the present utility model is a ladder type, the microcephaly is last, and major part is consistent with the diameter of filter bag.Reach 7: 1 because of special construction makes the ratio of induced air amount and air supply, be higher than the Venturi tube in x type cross section far away.Compressed air and the air of inducing enter after the Venturi tube, directly diffuse to filter bag along tube wall around, make filter bag hurried expansion from top to bottom produce very big impact shock, peel off the dust that sticks on the filter bag.Obviously, the ash-removal effect of ladder type Venturi tube is more far better than traditional.The ladder type Venturi tube is mounted in the space that does not take filter bag on the card, and the Venturi tube comparison with traditional has increased filter area.Owing to cancelled the necking down structure, reduced the drag overall of deduster.

The ladder type Venturi tube has solved the problem that traditional Venturi tube exists, and has improved the ash-removal effect of pulsed jet cloth filter, has reduced resistance.Widen the scope that pulsed jet cloth filter uses, improved the reliability of using.Consult Fig. 1 and Fig. 2

Embodiment 3: the utility model can rationally be provided with the indoor spatial distribution of filter bag, and best mode is that to make the ratio (being called for short " clean, dirt space ratio ") in the shared space of pure qi (oxygen) take up space and the outer dirt gas of filter bag in the filter bag be 0.2～0.45.Only, dirt space ratio is meant that the pulsed jet cloth filter filter bag is indoor, pure qi (oxygen) take up space and the filter bag ratio in the shared space of dirt gas outward in the filter bag.This notion is through our company's test for many years, and research and engineering practice sum up out, is used to instruct the important parameter value of filter bag chamber design.Particularly the pulse dust collector of design collection high concentration, high viscosity, high chiseling property of mill and ultrafine dust is particularly important.Improve the ash-removal effect of filter bag, reduce the resistance of deduster, except taking above measure, in the design of deduster, should consider that also there are enough dirt headrooms the filter bag chamber.Guarantee that dusty gas moves in the current stabilization space, could reduce the speed that dirt gas rises, guarantee that the dust that is peeled off on the filter bag can sedimentation under vertical power effect.The dust of avoiding being peeled off is once more by adjacent filter bag absorption.Increase the capacity of equipment of deduster.Because the size of dirt headroom design is the problem that influences the height of ash-removal effect and one-time investment.Simulated experiment explanation: clean, dirt space ratio, relevant with the ratio of bulk density with the real density of dust, ratio is big more, only, the ratio in dirt space is more little.Collect the deduster of high concentrate dust and high chiseling property of mill dust, this ratio also should be got value less than normal.Reasonably clean, the dirt space pulse cloth deduster than design is adopted in engineering practice explanation, and it is good not only to have an ash-removal effect, and dust remover resistance is low, and, about will doubling than general deduster the service life of cloth bag.Our company according to the character of dust select for use only, dirt space ratio, get about 0.2～0.45.Consult Fig. 1 and Fig. 2

Embodiment 4: the adjustable sealing rotary valve that star rotary valve 12 described in the utility model is constituted by valve rotary valve housing and rotor 23, shown in structural representation Fig. 4 of the present utility model, it is by rotary valve housing 22, parts such as sealing shroud 26 and rotor 23 are formed, and rotor 23 is provided with rotor slot 24, valve rotary valve housing is provided with charging aperture 21 and discharging opening 25, charging aperture 21 and discharging opening 25 are provided with charging aperture connector 18 and discharging opening connector 19, in rotary valve housing 22, be set with sealing shroud 26, and sealing shroud 26 is for lacking circle shape structure, be provided with the sliding sleeve 28 that survives movingly in the charging aperture 21 on rotary valve housing 22 tops, the bottom of sliding sleeve 28 is contained between sealing shroud 26 and the rotor 23 for the arc shaped engage sleeves.Rotary valve housing 22 walls that also can charging aperture 21 are provided with the adjusting bolt 27 that matches with sliding sleeve 28.Also can dirt-proof boot 29 be arranged at charging aperture 21 places.Rotary valve housing 22 described in the utility model can adopt casting or welding to make the special-shaped metal structure of air-tightness.Described charging aperture connector 18 and discharging opening connector 19 can adopt flange assembly.The top of described sealing shroud 26 can be orientable square or circular configuration.Described sealing shroud 26 partly is scarce circle structure with the containing of rotor 23.

According to Fig. 4 as can be known, rotary valve housing 22 is special-shaped metal structures, can adopt casting or welding fabrication according to working condition requirement.After installation, good air-tightness should be arranged.Sealing shroud 26 should be able to be installed and draw off to the structure of rotary valve housing 22 easily.Sealing shroud 26 adopts sliding sleeve 28 to connect with the top of the upper flange assembly of rotary valve housing 22, and the top of sealing shroud 26 is an orientable square or circular configuration.Sealing cover 26 partly is a scarce circle structure with the containing of rotor 23, and the size of its wrapping angle is decided by the volume and the structure of rotor.Should be able to guarantee reliable sealing performance.The location of sealing shroud 26 is highly also relevant with working temperature.

Because sealing shroud 26 is to float to connect with 22 employings of rotary valve housing, when rotor 23 rotations, gap between the endoporus of sealing shroud 26 and the rotor 23 can be adjusted according to the situation of rotation, in order to guarantee good air-tightness, the utility model rotary valve is in operation process, as long as the operator fails to hear or hear very little metal stridulation, the adjusting bolt 27 below can the flange on rotary valve housing 22 tops is fixed on sealing shroud 26 on a certain position.After use a period of time, can not satisfy technological requirement as the air-tightness of finding rotary valve, should unscrew this moment and regulate bolt 27, allow sealing shroud 26 under the effect of deadweight, the whereabouts is pressed close to rotor 23, and by above-mentioned adjustment method, the secured adjusted bolt 27 again.At this moment, original excessive gap promptly is eliminated, and has guaranteed the air-tightness of this valve.Regulate so repeatedly, this valve can use many decades.

The adjustment method that the utility model is used under the worst hot case is also similar to aforesaid way.Under worst hot case, use,, all adjusting bolts 27 of the present utility model all should be unscrewed, treat that temperature rise has reached after the running temperature, screw step by step again and regulate bolt 27, the fixed-site of sealing shroud 26 at warm-up phase.After operation a period of time,, can regulate as stated above, can eliminate excessive gap, satisfy technological requirement if excesssive gap can not satisfy technological requirement.

No matter be under normal temperature or worst hot case, to use, because sealing shroud 26 always produces friction and wearing and tearing is arranged with rotor 23, in use regulate the gap between sealing shroud 26 and the rotor 23 repeatedly, the wear extent of sealing shroud 26 is bigger than rotor 23, when the wall thickness of sealing shroud 26 progressively is thinned to a certain degree, at this moment the sealing shroud 26 that can only need more renew just can continue to use, and valve body and other parts etc. still can continue use, it and traditional rotary valve have relatively reduced cost of use greatly.Consult Fig. 3 and Fig. 4.

Claims

1. pulsed jet cloth filter, it is by comprising that air-purifying chamber (1), filter bag (5) and Filter-bag carcass (4), filter bag (6), blowing device (8), ash bucket (9), support (10), push-pull valve (11) and star rotary valve (12) constitute, Venturi tube is installed in deduster, it is characterized in that: the mode that the employing activity connects on the blast tube of blowing device (8) is connected with superonic flow nozzzle, and the center line of superonic flow nozzzle is aimed at the center line in cloth bag hole.

2. pulsed jet cloth filter according to claim 1, it is characterized in that: Venturi tube is installed on bag filter tubesheet, it is the ladder type Venturi tube of ladder type that described Venturi tube adopts cross sectional shape, the upper diameter of ladder type Venturi tube is greater than lower diameter, and lower diameter is consistent with the diameter of filter bag.

3. pulsed jet cloth filter according to claim 1 is characterized in that: indoor at filter bag, in the filter bag pure qi (oxygen) take up space and filter bag outward the ratio in the shared space of dirt gas be 0.2～0.45.

4. pulsed jet cloth filter according to claim 1, it is characterized in that: the adjustable sealing rotary valve that described star rotary valve (12) is constituted by valve rotary valve housing and rotor (23), rotor (23) is provided with rotor slot (24), valve rotary valve housing is provided with charging aperture (21) and discharging opening (25), charging aperture (21) and discharging opening (25) are provided with charging aperture connector (18) and discharging opening connector (19), in rotary valve housing (22), be set with sealing shroud (26), and sealing shroud (26) is for lacking circle shape structure, be provided with the sliding sleeve (28) that survives movingly in the charging aperture (21) on rotary valve housing (22) top, the bottom of sliding sleeve (28) is contained between sealing shroud (26) and the rotor (23) for the arc shaped engage sleeves.

5. pulsed jet cloth filter according to claim 4 is characterized in that: rotary valve housing (22) wall of charging aperture (21) is provided with the adjusting bolt (27) that matches with sliding sleeve (28).

6. pulsed jet cloth filter according to claim 4 is characterized in that: located dirt-proof boot (29) at charging aperture (21).

7. pulsed jet cloth filter according to claim 4 is characterized in that: described rotary valve housing (22) adopts casting or welding to make the air-tightness metal structure.

8. pulsed jet cloth filter according to claim 4 is characterized in that: described charging aperture connector (18) and discharging opening connector (19) are flange assembly.

9. pulsed jet cloth filter according to claim 4 is characterized in that: the top of described sealing shroud (26) is orientable square or circular configuration.

10. pulsed jet cloth filter according to claim 4 is characterized in that: described sealing shroud (26) partly is scarce circle structure with the containing of rotor (23).