CN202730155U - Gas phase pulse reverse blow-type internal filter-type bag type dust collector for blast-furnace gas - Google Patents

Abstract

The utility model discloses a dust collector, in particular to a gas phase pulse reverse blow-type internal filter-type bag type dust collector for blast-furnace gas. The utility model provides the gas phase pulse reverse blow-type internal filter-type bag type dust collector for the blast-furnace gas, which is capable of avoiding the phenomenon that seals of filter bags leak when dust removal is performed. The gas phase pulse reverse blow-type internal filter-type bag type dust collector for the blast-furnace gas comprises a container and a filter unit, wherein the filter unit is arranged in the container; the bottom part of the container is provided with a dust hopper; the filter unit comprises a mounting structure and the filter bags arranged on the mounting structure; the container is divided into an upper clean gas space and a lower raw gas space by the filter unit; the container is provided with a raw gas inlet and a clean gas outlet; the raw gas inlet is communicated with the raw gas space; the clean gas outlet is communicated with the clean gas space; the mounting structure comprises hanging platforms and mounting tube nests; openings of the filter bags are respectively and hermetically connected onto the mounting tube nests and are communicated with the raw gas space; the hanging platforms are arranged in the clean gas space; the hanging platforms are respectively provided with elastic hanging devices; and bag caps of the filter bags are respectively hung on the elastic hanging devices.

Description

Blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator

Technical field

The utility model relates to a kind of fly-ash separator, especially a kind of blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator.

Background technology

Iron and steel enterprise's blast furnace gas fully-dried type dust settling pocket technique, because domestic crude steel production capacity is larger, country considers from energy-saving and environmental protection, has carried out special regulation in industry standard, rules, thereby has been widely used at home.Developed countries is subjected to the impact of environmental protection, technology, and the full dry bag process device is used and is subject to certain restrictions.The blast furnace gas impulse sack cleaner that domestic application is more, develop from the environmental dust removal device, as deashing power take high pressure nitrogen, utilize pulse valve to be controlled at moment and emit nitrogen, inject at a high speed filter bag, filter bag is sharply expanded, rely on striking energy and blowback air stream to carry out deashing, mainly by the pulse of nitrogen Controlling System, the filter bag cylindrical shell, card, the outside filter method filter bag, the compositions such as bag cage, filter bag relies on snap ring to be fixed on the card, and finish the isolation of clean coal air chamber and rough coal air chamber, owing to when carrying out pulse dust cleaning, will inevitably cause the vibration of filter bag, will cause for a long time the sack of filter bag and the sealing of card the slit to occur, sack inevitably leaks ash, and filter bag only has an end to fix, in with pulse compression gas deashing, only depend on filter bag self expansion and wave deashing, because the finite elastic of filter bag self, the pulse dust cleaning that power is little can cause the filter bag distortion limited, ash-removal effect is bad; Deashing intensity greatly but cause simultaneously the damage of filter bag greatly caused the problems such as levels of leakage is high in the practical application, filtering accuracy is low when power was large, used the impact of transmission ﹠ distribution processing apparatus larger on TRT turbine and rear portion blast furnace gas.

In order to optimize the ash-clearing technology of pulse bag type dust collector, gas pulse sack cleaner, rotation impulse sack cleaner etc. arises at the historic moment, but is applied in the dedusting of blast furnace gas, poor effect, and problem is not still solved at all.More domestic steel mills attempt reverse back-blowing inward flow filtration-type pocket type fly-ash separator is applied in dedusting of blast furnace gas, though the aspects such as the deashing intensity of filter bag, life-span of the filter bag, support equipment reliability performances is better than pulse bag type dust collector, from TRT system and subsequent process the requirement of dedusting of blast furnace gas precision and stability also had gap.

The utility model content

Technical problem to be solved in the utility model provides a kind of filter bag blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator that seal leaks when deashing of avoiding.

The blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator that its technical problem that solves the utility model adopts, comprise container, be arranged on the filtering unit in the container, the bottom of described container is ash bucket, described filtering unit comprises mounting structure and the filter bag that is installed on the described mounting structure, described filtering unit is divided into the purified gas space on top and the raw gas space of bottom with described container, be provided with the outlet of raw gas import and purified gas on the described container, described raw gas import is communicated with described raw gas space, described purified gas outlet is communicated with described purified gas space, described mounting structure comprises to be hung platform and card is installed, the opening of described filter bag is sealedly connected on to install on the card and with described raw gas space and is connected, the described platform of hanging is arranged in the purified gas space, described hanging is provided with the resilient hanger device on the platform, the CAP NUTS of described filter bag is hung on the described resilient hanger device.

Further be, also comprise the purified gas back blow port, described purified gas back blow port is connected with described purified gas space.

Further be, also comprise the clean coal tracheae, described clean coal tracheae enters container from ash bucket, passes described installation card and is connected with described purified gas space, and described purified gas outlet all is arranged on the outer end that described clean coal tracheae is positioned at container with described purified gas back blow port.

Further be, described filter bag is by woven fiberglass layer and the compound formation of expanded PTFE (ePTFE) layer, described woven fiberglass layer is outer, described eptfe layer is internal layer, raw gas is via container card hole, enter filter bag, dust is by the filtering of internal layer varicosity eptfe layer, and the woven fiberglass layer by outer supporting role enters container purified gas space again.

Further be that the rectangular trapezoidal shape in the cross section of described ash bucket, the sidewall of described ash bucket comprise that at least one vertically leads grey section and grey section is led at least one inclination.

Further be that described ash bucket is made of arc surfaced, sidewall plane or its combination.

Further be, described resilient hanger device comprises elastic hook and flexible chain, and described elastic hook one end is hung on the flexible chain, and the other end is hung on the CAP NUTS; One end of described flexible chain is connected to described hanging on the platform, and the other end is connected to an end of elastic hook hanging bag cap.

Further be, also comprise shrinking-proof ring, described shrinking-proof ring is arranged on the described filter bag.

Further be, also comprise bulk cement storage tank, described bulk cement storage tank links to each other with the outlet of described ash bucket, is provided with star-shaped dust-discharging valve and flat closed type Special cut-off valve in the outlet of described ash bucket.

Further be, also comprise storehouse pump and ash releasing tube, described ash releasing tube links to each other with described storehouse pump, and described storehouse pump is arranged in the bulk cement storage tank, described ash releasing tube passes outside described bulk cement storage tank is communicated to, and described ash releasing tube is positioned on the outer end of described bulk cement storage tank and is provided with storehouse pump discharge trip valve.

The beneficial effects of the utility model are: because filter bag is to hang over by the resilient hanger device to hang on the platform, and keep rational tensile force.Therefore when adopting reverse gas cleaning, reasonable pressure, the blowback air-flow of flow and time length, by the anti-blowpipe of particular design and the plane of reflection of container top, produce evenly lower pressure gas stream in the ring section of the container that filter bag is installed, because the filter bag bottom is fixed with the installation card, pressing down the pressure of airflow function on the filter bag surface makes filter bag reversal deformation (filtering working order with respect to filter bag) and shrinks, cohesion is the axial tension of filter bag, the resilient hanger device on stretching filter bag top, after lower pressure gas stream disappears, form the up and down pulsation of filter bag, finish main deashing action.Resistance of the filter bag larger (can be that dust stratification is more, especially filter bag surface scale), the deformation force of filter bag is larger, and the axial tension of cohesion is larger, and the filter bag pulsation is more violent, so this soot cleaning system has adaptive ability to reach best ash-removal effect.This patent is different from the characteristics of traditional reverse gas cleaning, be exactly pulsation with filter bag as main purge mode, traditional reverse gas cleaning can not adapt to raw gas in the operating mode of filter bag surface scale.Certainly, what blowback formed presses down airflow function on CAP NUTS, to the pulling force that the resilient hanger device forms, also can help in various degree filter bag to form pulsation.In a word, system architecture is when realizing filtration, and also the energy distribution with the blowback air-flow is dust and the deashing energy of shaking off dust or dirty piece of reasonably blowing off.Filtration and cleaning efficiency have been improved greatly.Because pulsation is vertically carried out along filter bag, the radially mechanical seal between filter bag lower opening and the installation card, and the sealing of the expansion between filter bag upper shed and the CAP NUTS, unaffected, got rid of the possibility that dust is revealed; Simultaneously, the filter bag two ends are fixed, and the displacement that filter bag departs from longitudinal cenlerline is restricted, and have reduced collision probability between filter bag (being different from the socle girder fixed form of the long filter bag of pulse), and filter bag is avoided the collision machine damage.The purified gas outlet shares with the purified gas back blow port, draws from ash bucket, so that purified gas outlet glasses valve, back blowing machine and back-flushing valve all are in the bottom, the easy access operation.Filter bag covers formation by woven fiberglass layer and expanded PTFE (ePTFE) layer heat, can bear high temperature, avoids to greatest extent the burning bag risk, and bi-material stable chemical performance simultaneously is not hydrolyzed, anti-strong acid, makes filter bag avoid blast furnace gas acid dewing corrosion.The superelevation filtering accuracy of eptfe film makes the dust fouling only occur in film surface, and the characteristic of the extremely smooth and hydrophobic of film is also more easily removed the fouling of generation.The cross section is the asymmetric grey bucket structure of right-angled trapezium, makes the heap ash be difficult for forming, and defeated ash is more smooth and easy.Finally reach: under the prerequisite that satisfies to greatest extent the blast furnace gas operating mode, make stable the reaching of filtering accuracy of fly-ash separator≤0.5mg/Nm3(than the high 1-2 of a prior art order of magnitude), reliability significantly promotes.

Description of drawings

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

Fig. 2 is the A place enlarged view of Fig. 1;

Fig. 3 is the schematic diagram of a kind of embodiment of ash bucket;

Fig. 4 is the schematic diagram of the another kind of embodiment of ash bucket

Component, position and numbering among the figure: container 1, filter bag 2, hang platform 3, card 4 be installed, raw gas import 5, purified gas outlet 6, resilient hanger device 7, ash bucket 8, raw gas space 9, clean coal tracheae 10, purified gas space 11, purified gas back blow port 12, bulk cement storage tank 13, ash releasing tube 14, CAP NUTS 21, elastic hook 71, flexible chain 72, vertically lead grey section 81, tilt to lead grey section 82.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model comprises container 1, be arranged on the filtering unit in the container 1, the bottom of described container 1 is ash bucket 8, described filtering unit comprises mounting structure and the filter bag 2 that is installed on the described mounting structure, described filtering unit is divided into the purified gas space 11 on top and the raw gas space 9 of bottom with described container 1, be provided with raw gas import 5 and purified gas outlet 6 on the described container 1, described raw gas import 5 is communicated with described raw gas space 9, described purified gas outlet 6 is communicated with described purified gas space 11, described mounting structure comprises to be hung platform 3 and card 4 is installed, the opening of described filter bag 2 is sealedly connected on to install on the card 4 and with described raw gas space 9 and is connected, the described platform 3 of hanging is arranged in the purified gas space 11, described hanging is provided with resilient hanger device 7 on the platform 3, the CAP NUTS 21 of described filter bag 2 is hung on the described resilient hanger device 7.Ash bucket 8 itself consists of the part of container 1, namely is positioned at the bottom of container 1, and ash bucket 8 generally is integrally connected by the upper part of flange and container 1, also can be welding or one-body molded.Hang platform 3 and card 4 is installed is spaced a distance and is installed in the container 1, filter bag 2 arranges corresponding quantity as required, the CAP NUTS 21 of filter bag 2 is hung on by resilient hanger device 7 and hangs on the platform 3, it is tabular that installation card 4 is generally porous, the opening of each Kong Yuyi filter bag 2 is corresponding, the opening of filter bag 2 communicates with 4 sealings of installation card and with raw gas space 9, and in fact this moment, filter bag 2 internal spaces own were separated into the purified gas space 11 on top and the raw gas space 9 of bottom with container 1 jointly with installation card 4.When operation, the outlet of ash bucket 8 is in closing condition, the raw gas that needs to filter enters into raw gas space 9 from raw gas import 5, raw gas enters into filter bag 2 from the opening of filter bag 2, dust in the raw gas is blocked in the filter bag 2, purified gas after the filtration then sees through filter bag 2 and enters into purified gas space 11, and then purified gas is discharged by purified gas outlet 6, reaches the effect of dedusting with this.In use for some time, because dust is constantly piled up at the inwall of filter bag 2, cause the filtration efficiency of filter bag 2 to reduce, pressure reduction constantly increases, when reaching the value of setting, pressure reduction just need to carry out deashing to filter bag 2, so that filter bag 2 recovers filtration efficiency, close purified gas outlet 6 this moment, purified gas blowback producer (can be back blowing machine) and purified gas outlet 6 are connected, the purified gas blowback of boosting is to purified gas space 11, because filter bag 2 is installed to by resilient hanger device 7 and hangs on the platform 3, the resilient hanger device 7 general springs that adopt, can certainly be that some resilient materials are made, filter bag 2 relies on evenly two reactive forces of the formation of the blowback air-flow of reflection of cylindrical shell top: the downward pulling force of filter bag 2 CAP NUTSs under evenly reverse air pressure, make filter bag 2 bags radially inhale flat produced simultaneously filter bag 2 axial shrinkage pulling force with reverse air pressure, tensile elasticity erecting by overhang 7, after the blowback air-flow disappears, filter bag 2 up-down vibration, when cooperating of the Young's modulus of blowback air flowing pressure and flow and filter bag 2 and resilient hanger device 7, when reaching the best, can finish deashing and snaking to filter bag 2, the dust that filter bag 2 inwalls adhere to or dirty piece are broken away from by blowback and shake off, and the process of snaking more has benefited from the shake of filter bag.More because eptfe film is extremely smooth and the characteristic of hydrophobic, the deashing energy can be reduced to 20% of common energy, even lower.

Dust and dirty piece are collected by ash bucket 8, utilize the opening of ash bucket 8 to discharge.

Concrete, as shown in Figure 1, the utility model also comprises purified gas back blow port 12, described purified gas back blow port 12 is connected with described purified gas space 11.Purified gas back blow port 12 and purified gas export 6 and adopt same pipeline to be communicated with purified gas space 11, and both all open and close by valve control, and when raw gas purifying filtered, the unlatching purified gas exported 6 purified gas back blow ports and is in closing condition 12; Otherwise, in for filter bag 2 ash disposal, close purified gas outlet 6 and open purified gas back blow port 12.Adopt the mode of off-line ash-clearing.

As shown in Figure 1, the utility model also comprises clean coal tracheae 10, and clean coal tracheae 10 can enter from the top of container 1, directly is connected with purified gas space 11.Preferably: described clean coal tracheae 10 enters container 1 from ash bucket 8, passes described installation card 4 and is connected with described purified gas space 11, and described purified gas outlet 6 all is arranged on the outer end that described clean coal tracheae 10 is positioned at container 1 with described purified gas back blow port 12.The equipment that so better layout links to each other with gas pipe, namely equipment all is arranged on more lower position, is convenient to install, overhauls and monitoring.

In order to improve the performance of filter bag 2, described filter bag 2 covers formation by woven fiberglass layer and expanded PTFE (ePTFE) layer heat, and described woven fiberglass layer is outer, and described expanded PTFE (ePTFE) layer is internal layer.After adopting above-mentioned materials, the heatproof of filter bag 2 filtering systems reaches the upper limit of 260 ℃ of non-stop run temperature, avoids to greatest extent the burning bag risk, and bi-material stable chemical performance simultaneously is not hydrolyzed, anti-strong acid, makes filter bag avoid blast furnace gas acid dewing corrosion; The application of film (surface) filtering technique, blast-furnace dust only is deposited in film surface, deashing (dirt) energy is low, the ability of ant-scaling because the characteristic of the extremely smooth and hydrophobic of expanded PTFE (ePTFE) film, filter bag 2 have possessed, and the filtering system restorability is strong.Satisfy inevitably in short-term dewfall fouling industrial and mineral of blast furnace gas, last, owing to the superelevation filtering accuracy of expanded PTFE (ePTFE) film, make the high 1-2 of the filtering accuracy than a prior art fly-ash separator order of magnitude of fly-ash separator.The thickness of eptfe film (ePTFE) layer is generally 10 μ m～30 μ m, and the thickness of described woven glass layer is generally 0.3mm～0.5mm.Eptfe film (ePTFE) is born filtering function, and woven glass layer is mainly born supporting role.

The cross section of common ash bucket is generally isosceles triangle shape, in the situation that the deashing amount is larger, the black dirt that the right and left wall slides is more, be deposited in simultaneously outlet, easily cause outlet to stop up, stop up for fear of ash bucket 8 ash output holes, as shown in Figure 1, the rectangular trapezoidal shape in the cross section of described ash bucket 8, the sidewall of described ash bucket comprise that at least one vertically leads grey section 81 and grey section 82 is led at least one inclination.The face through the center of ash inlet 2 and ash output hole 3 is generally chosen in the cross section of ash bucket, so just easily is the ash bucket difference of isosceles trapezoid with common cross section.Thereby at least one wall of ash bucket 8 is vertical formation vertically leads grey section 81, other wall tilts to lead grey section 82 for the formation of tilting, when black dirt falls, can fall faster ash output hole over against the black dirt of vertically leading grey section 81 discharges, and the inclination of other black dirt process is led grey section 82 and tilted, and is slower through out-of-date black dirt speed, thereby so that the black dirt ash output hole that passes through successively discharge, the situation of having avoided like this all black dirts to pour into together ash output hole, the unfavorable situation of having avoided ash output hole to stop up.

As the first embodiment of ash bucket 8, as shown in Figure 3, the sidewall of ash bucket 8 is arc surfaced.The sidewall that vertically lead grey section 81 places this moment also is vertical, vertically lead grey section 81 and inclination and lead between the grey section 82 by arc transition, black dirt just is not easy to remain in the ash bucket like this, and the resistance that black dirt runs into when deashing is also less, efficient is higher, but its processing more complicated.

As the second embodiment of the present utility model, as shown in Figure 3, described ash bucket 8 is comprised of a plurality of plane sidewalls.Vertically lead grey section 81 and the inclination of this moment are led grey section 82 and are formed by smooth plate, that is to say that whole ash bucket 8 is to be formed by the smooth plate direct splicing, such tooling cost is just lower, but owing to can form the dead angle between the smooth plate, easily cause black dirt to assemble therein, affect deashing.Can carry out rounding to the dead angle this moment and process, avoid the black dirt accumulation.

As the compromise mode of two kinds of embodiments of ash bucket, can partial sidewall adopt circular arc, partial sidewall adopts smooth plate, and the effect that can obtain to compromise like this can be determined according to actual needs.

For the ease of the Oscillation Amplitude of adjustable elastic erecting by overhang 7, as shown in Figure 2, described resilient hanger device 7 comprises elastic hook 71 and flexible chain 72, and an end of described flexible chain 72 is connected to described hanging on the platform 3, and the other end is connected on the CAP NUTS 21; Described elastic hook 71 1 ends are hung on the flexible chain 72, and the other end is hung on flexible chain 72 or the CAP NUTS 21.The flexible chain 72 general steel chains that adopt get final product, in the process that hangs, flexible chain 72 length of reserving between two hanging points of elastic hook 71 namely are the length that elastic hook 71 can extend, it also is peak swing, therefore, the length of control reservation flexible chain 72 can be controlled the amplitude of whole resilient hanger device 7.Elastic hook 71 general spring and two hooks of adopting are made.In the deashing process of reality, just can be according to elastic hook 71 degree of agings or actual needs adjusting amplitude, thus the needs that vibrate when better meeting deashing are avoided the excessive damage filter bag 2 of amplitude, and avoiding also that amplitude is too small can't deashing.

Because 2 of filter bags are as flexibility, therefore easily flat behind the air-flow that is subject to recoiling, in order to prevent inboard overlay film collision friction, as shown in Figure 1, the utility model also comprises shrinking-proof ring, and described shrinking-proof ring is arranged on the described filter bag 2.Shrinking-proof ring adopts rigid material (being generally stainless steel) to make, and coats and makes in the outside of filter bag 2, arranges along the even interval of length of filter bag 2, allows every section generation of filter bag evenly to internal strain and change longitudinally drawing force of filter bag into.

Concrete, as shown in Figure 1, the utility model also comprises bulk cement storage tank 13, described bulk cement storage tank 13 links to each other with the outlet of described ash bucket 8, is provided with star-shaped dust-discharging valve and flat closed type Special cut-off valve in the outlet of described ash bucket 8.Bulk cement storage tank 13 can be collected the dust that vibrates under trembling, to do next step processing.Star-shaped dust-discharging valve can be used for control and unload ash, and the flat closed type Special cut-off valve can be closed storehouse pump 13 passages, prevents from spilling from storehouse pump 13 when raw gas filters.

Concrete, as shown in Figure 1, the utility model also comprises storehouse pump and ash releasing tube 14, and described ash releasing tube 14 links to each other with described storehouse pump, described ash releasing tube 14 passes outside described storehouse pump 13 is communicated to, and described ash releasing tube 14 is positioned on the outer end of described bulk cement storage tank 13 and is provided with storehouse pump discharge trip valve.Utilize storehouse pump 13 can extract the black dirt of collecting in the pump of storehouse out, then utilize ash releasing tube 14 that black dirt is discharged rear further the processing.

Claims (10)

1. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator, comprise container (1), be arranged on the filtering unit in the container (1), the bottom of described container (1) is ash bucket (8), described filtering unit comprises mounting structure and the filter bag (2) that is installed on the described mounting structure, described filtering unit is divided into the purified gas space (11) on top and the raw gas space (9) of bottom with described container (1), be provided with raw gas import (5) and purified gas outlet (6) on the described container (1), described raw gas import (5) is communicated with described raw gas space (9), described purified gas outlet (6) is communicated with described purified gas space (11), it is characterized in that: described mounting structure comprises to be hung platform (3) and card (4) is installed, the opening of described filter bag (2) is sealedly connected on installation card (4) and upward and with described raw gas space (9) is connected, the described platform (3) of hanging is arranged in the purified gas space (11), described hanging is provided with resilient hanger device (7) on the platform (3), the CAP NUTS (21) of described filter bag (2) is hung on the described resilient hanger device (7).

2. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 1, it is characterized in that: also comprise purified gas back blow port (12), described purified gas back blow port (12) is connected with described purified gas space (11).

3. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 2, it is characterized in that: also comprise clean coal tracheae (10), described clean coal tracheae (10) enters container (1) from ash bucket (8), pass described installation card (4) and be connected with described purified gas space (11), described purified gas outlet (6) all is arranged on the outer end that described clean coal tracheae (10) is positioned at container (1) with described purified gas back blow port (12).

4. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 1, it is characterized in that: described filter bag (2) is by woven fiberglass layer and eptfe layer is compound consists of, described woven fiberglass layer is outer, and described eptfe layer is internal layer.

5. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 1, it is characterized in that: the rectangular trapezoidal shape in cross section of described ash bucket (8), the sidewall of described ash bucket comprise that at least one vertically leads grey section (81) and grey section (82) is led at least one inclination.

6. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 5, it is characterized in that: described ash bucket (8) is made of arc surfaced, sidewall plane or its combination.

7. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 1, it is characterized in that: described resilient hanger device (7) comprises elastic hook (71) and flexible chain (72), described elastic hook (71) one ends are hung on the flexible chain (72), and the other end is hung on the CAP NUTS (21); One end of described flexible chain (72) is connected to described hanging on the platform (3), and the other end is connected to an end of elastic hook (71) hanging bag cap (21).

8. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 1, it is characterized in that: also comprise shrinking-proof ring, described shrinking-proof ring is arranged on the described filter bag (2).

9. such as the described blast furnace gas gas phase of the arbitrary claim of claim 1 to 8 pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator, it is characterized in that: also comprise bulk cement storage tank (13), described bulk cement storage tank (13) links to each other with the outlet of described ash bucket (8), is provided with star-shaped dust-discharging valve and flat closed type Special cut-off valve in the outlet of described ash bucket (8).

10. blast furnace gas gas phase pulsating back-blowing wind inward flow filtration-type pocket type fly-ash separator as claimed in claim 9, it is characterized in that: also comprise storehouse pump and ash releasing tube (14), described ash releasing tube (14) links to each other with described storehouse pump, described storehouse pump is arranged in the bulk cement storage tank (13), described ash releasing tube (14) passes outside described bulk cement storage tank (13) is communicated to, and described ash releasing tube (14) is positioned on the outer end of described bulk cement storage tank (13) and is provided with storehouse pump discharge trip valve.

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