CN102935316A - Large-scale filter filtration core failure protection apparatus - Google Patents
Large-scale filter filtration core failure protection apparatus Download PDFInfo
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- CN102935316A CN102935316A CN2012103962771A CN201210396277A CN102935316A CN 102935316 A CN102935316 A CN 102935316A CN 2012103962771 A CN2012103962771 A CN 2012103962771A CN 201210396277 A CN201210396277 A CN 201210396277A CN 102935316 A CN102935316 A CN 102935316A
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- guard member
- pressing plate
- protection device
- filtration core
- filter element
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Abstract
The present invention relates to a large-scale filter filtration core failure protection apparatus, which is characterized in that the apparatus comprises protection members plugged on upper end ports of every filtration core pipe inside a filter, wherein the protection member is prepared from a rigid porous material having a pore size of 1-300 mum, and has a shear strength of 20-50 MPa, an internal and external pressure strength of 2-4 MPa, and a relative permeability coefficient of 5000-10000 m<3>/m<2>.hr.MPa. Compared with the filtration core failure protection apparatus in the prior art, the filtration core failure protection apparatus of the present invention has the following characteristics that: in the case of filtration core rupture, dust-containing airflow rushes toward the protection member, and the pore of the protection member is instantaneously blocked, such that the airflow is completely blocked in the protection member, and does not enter the downstream so as not to pollute the back flushing gas source and the downstream system, such that reliability and stability of the filtration system are improved, and stable long-period operation of the large-scale apparatus is achieved.
Description
Technical field
The present invention relates to large-scale filtration device structure, specifically refer to a kind of large-scale filter element abating protection device.
Background technology
In the modern industry production process, the large-scale filter application that relates at high temperature direct purification dedusting of dusty gas is very extensive, as recovery, steel mill's blast furnace flue gas of high temperature air filtration and catalyst in the high temperature coal gas purification of integrated gasification combined cycle plants (IGCC) electricity generation system, the oil cat-cracker purify, high temperature gas cleanings such as the high-temp waste gas purification of incinerator, metal industry, glass ceramics industry etc.Large type filter generally includes housing, and housing is provided with gas access and gas vent, is provided with many filter cores in the housing.Gas to be filtered enters in the housing from the gas access, and dust wherein stopped to get off by the tube wall of each filter core, and purified gas enters in the filter core, discharges from the gas vent on the housing through the endoporus of filter core.When the dust load that gathers on the filter core reaches certain thickness, can purge these dusts to the filter core purge gas by the Venturi tube that is arranged in the housing, the dust that purges is discharged from the outlet at bottom of housing.Large type filter is because volume is larger, filter core in it is longer, thereby in use easily fracture and lose its filtration, the waste gas that contains like this dust can directly enter the downstream from the gas vent discharge, pollute other device of downstream and system, cause device to stop, shorten the problems such as downstream miscellaneous equipment service life, seriously restricted stable, the long period safe operation of device.
Summary of the invention
Technical problem to be solved by this invention is that the present situation for prior art provides a kind of large-scale gas purification filter filter core abating protection device; to prevent that " dirty " exhaust gas from entering blowback source of the gas and down-stream system; thereby improve the reliability and stability of filtration system, realize the long-period stable operation of downstream unit and system.
The present invention solves the problems of the technologies described above the concrete technical scheme that adopts: this large-scale filter element abating protection device; it is characterized in that comprising the guard member of the gas vent of each filter core of shutoff in filter; it is the porous material preparation of 1～300 μ m that this guard member adopts the aperture of rigidity; the shear strength of this guard member is that 20～50MPa, anti-interior external pressure strength are 2～4MPa, and relative permeability is 5000～10000m
3/ m
2HrKPa.Described guard member can be sheet or barrel-like structure.
For maintenance and the replacing that makes things convenient for guard member and filter core; described guard member detachably is arranged on the pressing plate; the upper port of each described guard member and each described filter core is connected by the tube connector of correspondence respectively; the upper mounted plate of described pressing plate and described filter core be arranged in parallel; described tube connector is between described pressing plate and fixed plate; and cover has spring, the two ends of this spring to conflict respectively on described pressing plate and described fixed head on the described tube connector.In this structure, spring has played the effect of expansion joint, the guard member of avoiding different materials with filter core because the different different thermal stress that cause of thermal coefficient of expansion cause pressing sealing structure to lose efficacy, thereby prevent that dirt gas stream from revealing from hermetically-sealed construction.
For assembling and the reduction difficulty of processing that makes things convenient for guard member; can be provided with the sleeve pipe that protrudes along airflow direction at described pressing plate; described sleeve pipe and described tube connector are tightly connected; described guard member blocks the upper port of this sleeve pipe, and described sleeve pipe is threaded connection with described connector and is in the same place.
Described pressing plate can be connected by bolt with described fixed head.This structure also be for for convenience detach, safeguard and the purpose of installing and designing.
In above-mentioned each scheme, described guard member is preferably barrel-like structure, and the external diameter of this guard member is 60 ~ 80mm, length 200 ~ 500mm.
Compared with prior art; the invention provides a kind of large-scale gas purification filter filter core abating protection device; it is in the situation that the filter core fracture; dust-containing air stream rushes at guard member, and the instantaneous obstruction of guard member pore, air-flow are then intercepted in guard member fully; can not enter the downstream; pollute blowback source of the gas and down-stream system, thereby improve the reliability and stability of filtration system, realize the large-scale plant long-period stable operation.The high temperature gas cleanings such as filter core abating protection device provided by the present invention recovery, steel mill's blast furnace flue gas of high temperature air filtration and catalyst in the high temperature coal gas purification of integrated gasification combined cycle plants (IGCC) electricity generation system, oil cat-cracker purifies, the high-temp waste gas purification of incinerator, metal industry, glass ceramics industry etc.All be widely used in fields such as pipeline high temperature coal gas purification, coal-burning boiler, nuclear exhaust-gas treatment, calcium carbide steam stove, incinerator, the gas purification of chemical industry high-temperature catalytic and catalyst recovery, the purifications of hot high pressure gas.Simultaneously; the selection of the filtering accuracy of guard member of the present invention, resistance drop, mechanical strength; can either guarantee that the purifying gas flow non-resistance passes through in the normal filtration situation; can guarantee again when corresponding filter core fractures; the pore of the instantaneous obstruction guard member of working condition dust; also must satisfy the pressure oscillation that the high pressure blowback system causes simultaneously, and on the blowback effect of filter core substantially without impact.
Description of drawings
Fig. 1 is the cutaway view that the embodiment of the invention is used the state assembly structure;
Fig. 2 is the partial enlarged drawing of A among Fig. 1;
Fig. 3 is the partial enlarged drawing of B among Fig. 2.
The specific embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, introduce first the large-scale filtration device structure that uses this filter core abating protection device.
This large type filter comprises housing 1, and housing is provided with air flow inlet 11 and air stream outlet 12, is provided with the many filter cores that are arranged in parallel 13 in the housing, and the upper/lower terminal of these filter cores is separately fixed on upper mounted plate 14 and the bottom plate 15.The top of housing is provided with back blow port 16, and the upper port of each filter core all is communicated with the inner chamber of Venturi tube 17.When the gas of entrained dirt passed through filter core, dust was trapped in the filter element outer wall, and the dust that is captured in the filter core outer wall is called filter cake, removed frequency or the cycle of filter cake and can determine according to setting pressure reduction or time.Purge gas adverse current during ash disposal and descending enters in the filter element by Venturi tube 17, blows away the filter cake of filter core outer wall by the anti-stream of the micropore on the element wall, and last, filter cake falls under gravity into the container bottom, discharges outside the housings by dust export 10.
Large-scale filter element abating protection device in the present embodiment is that guard member 2 is installed on the upper port of each filter core, and concrete structure is as follows:
Guard member 2 can be used laminated structure, also can use barrel-like structure.Guard member is positioned at the inner chamber of Venturi tube 17.The selection principle of guard member material mainly is: its material will satisfy working condition requirement and the requirement of blowback pressure, and the filtering accuracy of guard member and the filtering accuracy of filter core, pore-size distribution are suitable, and under nominal situation on gas flow without impact.Be barrel-like structure to the guard member in the present embodiment, the porous material preparation that its aperture that can adopt rigidity is 1～300 μ m, the shear strength of this guard member be 20～50MPa, anti-in external pressure strength be 2～4MPa, relative permeability is 5000～10000m
3/ m
2HrMPa, the resistance drop that causes under the operating mode flow is at 1 ~ 50Kpa.Adopt the guard member of the barrel-like structure of stainless steel material preparation in the present embodiment, its diameter
Be 50mm, the diameter of guard member can be selected in 10 ~ 200mm as required, can select in 60 ~ 80mm preferably; The height of guard member is 300mm, and the height of guard member can be selected in 5 ~ 800mm as required, preferably, can select in 200 ~ 500mm.The material that meets above-mentioned condition can also be selected other metals, pottery etc., for example SiC pottery, Al
2O
3Pottery, metallic nickel, Titanium, high temperature alloy etc.
The filtering accuracy of guard member needs the dust amount of leakage of caused pressure drop under the filtering accuracy, operating mode flow according to filter core, permission comprehensively to determine.The filtering accuracy of filter core is 1 ~ 5 μ m in the present embodiment, and the filtering accuracy of guard member is at 10～50 μ m, and the resistance that causes under the operating mode flow is reduced to 1 ~ 20Kpa.The filtering accuracy of guard member, resistance drop, mechanical strength must be allowed a choice, and so just the unlikely resistance drop that guard member is caused surpasses system's allowed band.It is too high that the guard member filtering accuracy is selected, and relative permeability is on the low side, and SR falls and must increase, and causes filtration system blowback frequency to increase, and easy sedimentating dust in guard member, reduces the blowback effect; The guard member filtering accuracy was selected low, and when filter element fractureed, working condition dust can not instantaneous obstruction guard member, causes the system outlet dustiness higher, loses the meaning that guard member is set.Simultaneously, the mechanical strength of guard member must satisfy the pressure oscillation that the high pressure blowback system causes.
For dismounting and the replacing that makes things convenient for guard member; the present embodiment is arranged at intervals with pressing plate 3 above upper mounted plate 14; be provided with the sleeve pipe 31 of a plurality of evaginations on the upper surface of pressing plate 3 corresponding to each filter core; this sleeve pipe 31 is riffled tube; the lower end of guard member 2 is connected with male-pipe 21, and guard member 2 is threaded in the sleeve pipe 31 by the male-pipe 21 of lower end.Offer a plurality of jacks corresponding to each sleeve pipe 31 on the pressing plate 3.Each filter core 13 and each corresponding guard member 2 are connected by tube connector 4.
Tube connector 4 is between pressing plate 3 and upper mounted plate 14.14 of pressing plate 3 and upper perforated plates are separated with spacing, and both are connected by bolt and nut 9.The internal diameter of tube connector 4 is less than the internal diameter of filter core 13, and the lower end of tube connector has the flange of evagination, and the flange of tube connector connects the tube wall of filter core, and is provided with gasket seal 7 between the two, thereby makes the upper port of the corresponding filter core of lower port sealing connection of tube connector.
Each tube connector 4 outer spring 6 that all are arranged with, conflict on the flange of tube connector in the lower end of spring 6, and conflict on pressing plate 3 in the upper end of spring 6.The upper end of the tube connector of tube connector 4 is passed corresponding jack and is plugged in the corresponding sleeve pipe 31, thus the inner chamber of connective protection spare.Be provided with sealing ring 5 between tube connector 4 and the jack, the sealing ring 5 in this enforcement is the stone mill packing, also can select as required O type circle.Be provided with sealing steel plate washer 8 between the upper surface of the lower surface of male-pipe 21 and sealing ring 5, and sealing steel plate washer 8 is arranged with on the tube connector 4.
The operation principle of this large-scale filter element abating protection device is as follows:
Under the nominal situation; the gas that contains dust enters in the filter from air flow inlet 11, and outside filter core, the filter opening that clean air passes on the filter core enters in the filter core dust by filter core backstop; pass the passage of filter core from the hole outflow of guard member, then send filter via air stream outlet 12.Because the filtering accuracy of guard member is far smaller than the filtering accuracy of filter core, therefore, the air of the cleaning after the filtration can not be subject to any obstruction when sending filter.Namely when filter core worked, guard member was because of the relative permeability of its air transmission coefficient far above filter element, not to filtering and blowback air-flow formation obstruction.
When filter core fractureed, the unstripped gas that contains dust of filtered was with the speed far above normal filtration, and rapid permeability is inner to guard member, stops up the hole on the guard member, cuts off gas channel corresponding to this inefficacy filter core, thereby avoids unstripped gas to enter downstream unit.
Claims (6)
1. one kind large-scale filter element abating protection device; it is characterized in that comprising the guard member on the upper port of each filter tube of shutoff in filter; it is the porous material preparation of 1～300 μ m that this guard member adopts the aperture of rigidity; the shear strength of this guard member is that 20～50MPa, anti-interior external pressure strength are 2～4MPa, and relative permeability is 5000～10000m
3/ m
2HrMPa.
2. large-scale filter element abating protection device according to claim 1 is characterized in that described guard member is sheet or barrel-like structure.
3. large-scale filter element abating protection device according to claim 1 and 2; it is characterized in that described guard member detachably is arranged on the pressing plate; the upper port of each described guard member and each described filter core is connected by the tube connector of correspondence respectively; the upper mounted plate of described pressing plate and described filter core be arranged in parallel; described tube connector is between described pressing plate and fixed plate; and being arranged with spring on the described tube connector, conflicts respectively on described pressing plate and described fixed head in the two ends of this spring.
4. large-scale filter element abating protection device according to claim 3; it is characterized in that described pressing plate is provided with the sleeve pipe that protrudes along airflow direction; described sleeve pipe and described tube connector are tightly connected; described guard member blocks the upper port of this sleeve pipe, and described sleeve pipe is threaded connection with described connector and is in the same place.
5. large-scale filter element abating protection device according to claim 4 is characterized in that described pressing plate is connected by bolt with described fixed head.
6. large-scale filter element abating protection device according to claim 5 is characterized in that described guard member is barrel-like structure, and the external diameter of this guard member is 60 ~ 80mm, length 200 ~ 500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210396277.1A CN102935316B (en) | 2012-10-18 | 2012-10-18 | Large-scale filter filtration core failure protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210396277.1A CN102935316B (en) | 2012-10-18 | 2012-10-18 | Large-scale filter filtration core failure protection apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102935316A true CN102935316A (en) | 2013-02-20 |
| CN102935316B CN102935316B (en) | 2014-08-13 |
Family
ID=47694256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210396277.1A Active CN102935316B (en) | 2012-10-18 | 2012-10-18 | Large-scale filter filtration core failure protection apparatus |
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| CN (1) | CN102935316B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107281848A (en) * | 2017-08-23 | 2017-10-24 | 萍乡市普天高科实业有限公司 | A kind of waste gas filter |
| CN107970710A (en) * | 2017-12-27 | 2018-05-01 | 河南龙成煤高效技术应用有限公司 | A kind of high-temperature filter filter core bottom outlet locating piece |
| CN108543352A (en) * | 2018-06-14 | 2018-09-18 | 成都易态科技有限公司 | Filter core connector and its component |
| CN112090179A (en) * | 2020-04-08 | 2020-12-18 | 成都易态科技有限公司 | Filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3810405A1 (en) * | 1988-03-26 | 1989-10-12 | Weber Ekkehard | Safety device for filtering dust separation elements |
| CN202237633U (en) * | 2011-10-13 | 2012-05-30 | 北京雪迪龙科技股份有限公司 | Protection filter |
| CN202336262U (en) * | 2011-10-31 | 2012-07-18 | 福建工程学院 | Gas filter for exploiting combustible ice |
-
2012
- 2012-10-18 CN CN201210396277.1A patent/CN102935316B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3810405A1 (en) * | 1988-03-26 | 1989-10-12 | Weber Ekkehard | Safety device for filtering dust separation elements |
| CN202237633U (en) * | 2011-10-13 | 2012-05-30 | 北京雪迪龙科技股份有限公司 | Protection filter |
| CN202336262U (en) * | 2011-10-31 | 2012-07-18 | 福建工程学院 | Gas filter for exploiting combustible ice |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107281848A (en) * | 2017-08-23 | 2017-10-24 | 萍乡市普天高科实业有限公司 | A kind of waste gas filter |
| CN107970710A (en) * | 2017-12-27 | 2018-05-01 | 河南龙成煤高效技术应用有限公司 | A kind of high-temperature filter filter core bottom outlet locating piece |
| CN108543352A (en) * | 2018-06-14 | 2018-09-18 | 成都易态科技有限公司 | Filter core connector and its component |
| CN108543352B (en) * | 2018-06-14 | 2023-12-12 | 成都易态科技有限公司 | Filter element joint and assembly thereof |
| CN112090179A (en) * | 2020-04-08 | 2020-12-18 | 成都易态科技有限公司 | Filter |
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| Publication number | Publication date |
|---|---|
| CN102935316B (en) | 2014-08-13 |
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