CN101658750B - Composite flyash filter with built-in cyclone pre-dusting - Google Patents

Composite flyash filter with built-in cyclone pre-dusting Download PDF

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Publication number
CN101658750B
CN101658750B CN200810146809XA CN200810146809A CN101658750B CN 101658750 B CN101658750 B CN 101658750B CN 200810146809X A CN200810146809X A CN 200810146809XA CN 200810146809 A CN200810146809 A CN 200810146809A CN 101658750 B CN101658750 B CN 101658750B
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filter
dust collectors
cyclone dust
cyclone
gas
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CN101658750A (en
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盛新
许世森
郑明峰
李继炳
郜时旺
亢万忠
韩启元
夏军仓
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China Petroleum and Chemical Corp
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China Petroleum and Chemical Corp
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Abstract

The invention aims to provide a composite flyash filter with built-in cyclone pre-dusting. The filter can greatly reduce the dust load of a filtering element in a ceramic filter or a metal filter, and simultaneously solves the problems of repeated 'flyash treating system' and large coverage area of simple series connection of a cyclone dust collector and the ceramic filter in the prior art.

Description

The composite flyash filter of built-in cyclone pre-dusting
Affiliated technical field
The present invention relates to a kind of fly-ash filter that is used for filtering the dust of industrial gasses, more particularly, it relates to is a kind of composite flyash filter of built-in cyclone pre-dusting.
Prior art
In industry, often need for example in coal gasification industry, synthetic gas be filtered to some industry gas dust removings to filter out wherein entrained dust.In the prior art, cyclone dust collection technology and ceramic filter technology/metal filtration technology all can be used for the dedusting of industrial gasses.
Germany schumacher (Schumacher) company has developed the refractory ceramics filter the earliest; The principle of this filter is a surface filtration, filters and mainly carries out on the surface, and the penetrance of grit is lower; Its efficiency of dust collection can reach more than 99.9%, and clean flue gas concentration is less than 20mg/Nm 3(milligram/standard cubic meter).Be generally the projected life of ceramic filter or metallic filter filter element 8000 hours even lower, the leakage of ceramic filter element not only influences the performance of filter itself, causes the gas ash content of clean gas side sharply to rise; This not only causes efficiency of dust collection to descend; And can cause follow-up water wash system fouling to stop up, the operation difficulty has also strengthened the preliminary water treatment system load of waste water; Cause the wastewater treatment difficulty, whole production system is compelled when serious stops.Again because the cost of ceramic filter or metallic filter is expensive, so receive people's attention the service life of ceramic filter or metallic filter all the time.Dust load in the gas is higher to be one of too short principal element of ceramic filter/metallic filter life-span, thereby the dedusting pressure drop is high, deashing frequently causes pottery or metal filter element cracky owing to dust content height in the gas can bring.
Cyclone dust collection technology is a kind of dedusting technology of maturation, and its simple in structure, no-rotary part can adapt to operation at high temperature preferably.The centrifugal force that produces when cyclone dust collectors utilize air-flow to rotate is realized separating, and solid particle is because quality is big, and the centrifugal force that receives is also big; Move to barrel rapidly; Lose speed with the wall collision, under the effect of inertia and gravity, move down, thereby realize the separation of gas-solid two phases.Through optimal design, the best dust removing effects of monomer cyclone dust collectors can be removed the above particle of 10 μ m at present, and 5~10 μ m particle efficiency of dust collections are about 85%.Compare with above-mentioned ceramic filter/metallic filter, its filter efficiency is relatively low, does not reach some industrial dedusting requirement.Contained fly ash granule is thinner in the industrial gasses (for example synthetic gas), and gas vent side dust concentration requires less than 20 milligrams/standard cubic meter.Therefore; Cyclone dust collectors are generally only made the preparatory cleaner that some industrial gasses (for example synthetic gas) purify; Grit bigger in these industrial gasses is carried out pre-separation, reduce the load of subsequent fine cleaner, thereby improve the service life of smart cleaner.
Patent 98105707.1 has proposed a kind ofly will contain the dust arrester of the dust dedusting of Ca with ceramic filter, and it can suppress the differential pressure rate of climb of filter.Burning gases are used the cyclone dust collectors dedusting, and the gas after the cyclone dust collectors dedusting enters into the filtering container with ceramic filter, and dust is captured.Burning gases after dust is captured are fed in the combustion gas turbine, generate electricity.This patent is with cyclone dust collection technology and ceramic filter technology series connection " dust arrester and method of operation thereof "; This method with cyclone dust removal as preparatory cleaner; The performance of both having utilized cyclone dust removal at high temperature to work has reduced the dust load of ceramic filter again.But this method just is together in series ceramic filter system and cyclone filter system independently of one another, and the shortcoming of doing like this is that ceramic filter system and cyclone filter system all need the dust after a cover flying dust treating system is handled filtration separately.Every cover flying dust treating system all bulky (as up to tens of rice).This has not only significantly increased the expense of equipment, and makes system complex, has reduced the reliability of system.It is thus clear that, how cyclone dust collectors and ceramic filter/metallic filter are combined, both reduced the dust load of ceramic filter/metallic filter, avoid again increasing huge flying dust treating system, be the problem that needs solution.
The present invention is intended to solve problems such as the dedusting pressure drop that HTHP ceramic filter or sintered metal filter dust load height bring is high, deashing is frequent, filter element is damaged, service life is short.
Summary of the invention
The composite flyash filter that the purpose of this invention is to provide a kind of built-in cyclone pre-dusting; It can reduce the dust load of filter element in ceramic filter or the metallic filter greatly; Cyclone dust collectors and simple " flying dust treating system " repetition of connecting and being had of ceramic filter in the prior art have been avoided simultaneously again, the problem that floor space is huge.
To achieve these goals, the invention provides a kind of composite flyash filter of built-in cyclone pre-dusting, comprising: filter housings, housing are provided with gas access and gas vent; Tube sheet; At least one filter element is installed on this tube sheet; Said tube sheet and said filter element are divided into clean side and dust-laden side with said filter housings inner space together; Said gas access is set in place on the filter head housings body portion of dust-laden side, and said gas vent is set in place on the filter head housings body portion of clean side;
At least one cyclone dust collectors; These at least one cyclone dust collectors are arranged at the dust-laden side within the said filter housings; Each cyclone dust collectors has the cyclone dust collectors cylindrical shell, be arranged on the gas inlet pipe of this cyclone dust collectors cylindrical shell circumference tangential and be arranged on the cyclone dust collectors outlet of this cyclone dust collectors cylindrical shell upper end; Said inlet tube is communicated with said gas access fluid; Treat that from said gas access through what said inlet tube entered into said cyclone dust collectors cylindrical shell dedusting gas is by the preparatory dedusting of said cyclone dust collectors; Gas after the dedusting flows out said cyclone dust collectors from said cyclone dust collectors outlet in advance; The gas that flows out said cyclone dust collectors from said cyclone dust collectors outlet is further filtered by said filter element, and the gas after the filtration enters into said clean side, and via said gas vent outflow filter housing.
In the composite flyash filter of built-in cyclone pre-dusting of the present invention, said filter element can be ceramic filter element or sintered metal filtration element.
At the composite flyash filter of built-in cyclone pre-dusting of the present invention, the said inlet tube of each cyclone dust collectors can be communicated with said gas access fluid via a gas distributor.
In the composite flyash filter of built-in cyclone pre-dusting of the present invention, said gas distributor has a plurality of outlets, and each outlet is provided with cyclone dust collectors, promptly the quantity of cyclone dust collectors and gas distributor to divide equally share quantity consistent.
In the composite flyash filter of built-in cyclone pre-dusting of the present invention; Each said cyclone dust collectors outlet also correspondence is provided with a vapor riser; The axis of said cyclone dust collectors cylindrical shell overlaps with said vapor riser axis; And said cyclone dust collectors cylindrical shell overlaps with said vapor riser, and the gas vent of cyclone dust collectors is arranged in the tedge.
In the composite flyash filter of built-in cyclone pre-dusting of the present invention, the gas vent of cyclone dust collectors is arranged in the tedge, can link to each other with vapor riser through the outlet divergent segment.
The present invention is in the composite flyash filter of built-in cyclone pre-dusting of the present invention; Each said cyclone dust collectors outlet also can correspondence be provided with a vapor riser; The axis of said cyclone dust collectors cylindrical shell overlaps with said vapor riser axis; And said cyclone dust collectors cylindrical shell is connected through cone with said vapor riser, and the cone semi-cone angle is between 10~45 °.
In the composite flyash filter of built-in cyclone pre-dusting of the present invention; Easily the position of laying dust can be provided with roof type accumulatingdust baffle plate above said cyclone dust collectors inlet tube and cyclone dust collectors cylindrical shell, prevents to remove the dust deposit that gets off at these positions from said filter element.
In the composite flyash filter of built-in cyclone pre-dusting of the present invention, wherein also be provided with cross vortex broken device in the bottom of said cyclone dust collectors cylindrical shell, prevent to produce the gas whirlpool and cause the generation of reentrainment of dust in said cyclone dust collectors bottom.
In the composite flyash filter of built-in cyclone pre-dusting of the present invention, below said cyclone dust collectors cylindrical shell, also be provided with dipleg, be used to increase gas and flow out the resistance of said cyclone dust collectors cylindrical shell downwards, thereby prevent the generation of reentrainment of dust.
The composite flyash filter of built-in cyclone pre-dusting of the present invention can be applicable to the dedusting of HTHP synthetic gas.
For preventing on cyclone dust collectors, to pile up when the filter element cake layer from removing; The cylindrical shell of cyclone dust collectors overlaps with vapor riser; Perhaps, establishes the cyclone dust collectors cylindrical shell cone changeover portion when not exclusively overlapping with vapor riser; The gas vent of cyclone dust collectors is arranged in the tedge, links to each other with vapor riser through divergent segment.Top, cyclone dust collectors gas access is provided with the roof type structure, prevents the flying dust accumulation.The outlet of cyclone dust collectors flying dust is provided with air-lock device.
The synthesis gas of taking dirt is after the preparatory dedusting of built-in cyclone dust collectors; Fly ash content in the synthesis gas will significantly reduce, thereby the cake layer formation speed of the filter element surface of ceramic filter or sintered metal filter also will significantly reduce, under the situation that does not change preset deashing pressure drop; Can select time longer at interval deashing pattern; Because the reduction of reverse gas cleaning frequency also will obtain prolonging the service life of filter element, thereby the stable operation of the system of assurance.
In preferred version of the present invention; The present invention utilizes ceramic filter/metallic filter in the prior art, gas distributor, vapor riser and existing space; Be arranged in cyclone dust collectors in ceramic filter/fly-ash filter compactly; The flying dust that the cyclone dust collectors pre-separation is got off directly falls in the flying dust feeder of ceramic filter/metallic filter, need not increase extra flying dust treating system, has reduced floor space greatly.After the preparatory dedusting of cyclone dust collectors, the flying dust concentration in the synthesis gas significantly reduces, and can select lower filtration pressure drop and cleaning cycle to the filter element blowback of regenerating, thereby has prolonged the service life of filter element, has also practiced thrift cost.
The present invention is through carrying out preparatory dust removal process to synthesis gas; Can be under the prerequisite that does not increase flying dust treating system; Significantly reduce the dust load of ceramic filter or metallic filter filter element, reduce its deashing pressure drop, prolong cleaning cycle; Thereby reduced the damaged risk of filter element, prolonged the service life of filter element.
The present invention can be as required, and the preparatory efficiency of dust collection of cyclone dust collectors is selected in less than 85% scope.With regard to the HTHP fly-ash filter, the preparatory efficiency of dust collection of cyclone separator is high more, and then the flying dust load of pottery or sintered metal filtration element is low more, and is favourable more to the protection of filter element.But when the efficient of cyclone separator was too high, the wearing and tearing of cyclone separator are aggravation thereupon also, and through testing and taking all factors into consideration, the preparatory efficiency of dust collection of cyclone dust collectors preferably selects 40~60%.
Hereinafter, will present invention is described with reference to accompanying drawing, but the present invention is not limited only to the situation described in the figure, wherein:
Description of drawings
Fig. 1 is ceramic filter or the sketch map of metallic filter in the prior art;
Fig. 2 is the sketch map of the composite flyash filter of built-in cyclone separator of the present invention;
The profile of Fig. 3 A-A line that is composite flyash filter of the present invention in Fig. 2;
Fig. 4 is the enlarged drawing at composite flyash filter of the present invention position shown in the circle in Fig. 2, shows the built-in cyclone dust collectors that combine with ceramic filter;
Fig. 5 is the built-in cyclone separator gas access sketch map of the present invention.
The specific embodiment
Fig. 1 is ceramic filter or the fly-ash filter sketch map of metal filtration type in the prior art, and this fly-ash filter is that example describes with the ceramic filter, but should be understood that this fly-ash filter also can use sintered metal filter.The flying dust that ceramic filter can be used for being comprised in the crude synthesis gas with the HTHP in the coal gasification apparatus clears out in ceramic filter.Dust content about 1~2 (maximum 20) mg/Nm3 milligram/standard cubic meter in the synthesis gas after the filtration.The flying dust feeder falls into flying dust blowing jar to the flying dust that this ceramic filter gets off through the filter bottom, and system discharges through the lock bucket.This ceramic filter is provided with blowback system, and when the dust of the filter element surface of ceramic filter arrived desired indicator, this blowback system utilized gases at high pressure that the filter element of ceramic filter is carried out pulse cleaning.
Describe the structure and the operation principle of the ceramic filter of this prior art below in detail with reference to Fig. 1.Crude synthesis gas or be called is taken the gas access 13 of dirt synthesis gas on being arranged in filter housings, is got into the inner space of ceramic filters through gas distributor 12, vapor riser 6.In ceramic filter; At least one filter element 11 is installed on the tube sheet 10; Tube sheet 10 is separated into dust-laden side that is positioned at tube sheet 11 belows and the clean side that is positioned at tube sheet 11 tops with filter element mounted thereto 11 inner spaces with ceramic filter; Forming gas can only get into clean side from the dust-laden side through filter element 11, is filtered 11 filtrations of element simultaneously.Just, the synthesis gas that is entered into ceramic filter by vapor riser 6 is to enter into the dust-laden side, and here, synthesis gas passes the filter element 11 that is installed on the tube sheet 10.Gas passes the surface of filter element 11 by dedusting; Flying dust is left on filter element 11 surfaces, forms cake layer, along with cake layer thickens; The filtration pressure general who has surrendered can increase; Be increased to preset value when filtering pressure drop, need to start 7 pairs of filter elements 11 of deashing device and regenerate, deashing device 7 comprises air accumulator, pulse valve and blowback nozzle etc.; In the direction opposite with filtering direction (promptly from clean side toward the dust-laden side) 11 groups of filter elements are carried out the regeneration that the pulsed winding-up realizes filter element through deashing device 7, flying dust will fall in the flying dust feeder 14.The regeneration of a plurality of filter elements 11 can not carried out simultaneously, that is, when wherein certain filter element 11 was reproduced, other filter elements 11 can continue filtration work.
The clean synthesis gas that enters into clean side after being filtered through filter element 11 is discharged by syngas outlet 9 and is got into subsequent handlings.
Ceramic filter tube sheet about in the of 10 both sides be that dust-laden side and clean side are respectively equipped with manhole 4 and 8, manhole 4 and 8 makes things convenient for people's entering, is used for the installation and the maintenance of equipment.
Ceramic filter ruuning situation from above-mentioned prior art; Because the dust content of taking in the dirt synthesis gas is bigger; Cause ceramic filter element 11 loads too high, subject matter has the pressure drop of filtration big, and deashing is frequent; Problems such as ceramic filter element 11 breakages have had a strong impact on the stable operation of whole system.And along with the increase of synthesis gas flow and fly ash content, above problem will be more outstanding.And ceramic filter element 11 is expensive component relatively, so will raise the cost greatly.
For addressing this problem; The present invention proposes the composite flyash filter of built-in whirlwind preseparator; Promptly; Cyclone dust collectors are built in the fly-ash filter shown in Figure 1 (ceramic filter or metallic filter) compactly, and the inner space that it makes full use of existing ceramic filter or metallic filter is built in cyclone dust collectors in ceramic filter or the metallic filter.To describe the composite flyash filter of built-in whirlwind preseparator of the present invention with reference to Fig. 2 below.
Referring to accompanying drawing 2; Take the composite flyash filter of dirt synthesis gas 13 entering built-in whirlwind preseparator of the present invention from the gas access; Get in several parallelly connected cyclone dust collectors through gas distributor 12, cyclone dust collectors inlet tube 2; Take the dirt synthesis gas in revolving the branch deduster by in advance dedusting, the flying dust of removing in advance enters in the flying dust feeder 14 through dipleg 1, dipleg 1 is the fall pipe of ash of cyclone dust collectors bottom; Be used for when the high concentration flying dust falls, the gas that reduces in the cyclone dust collectors flows out from the bottom.Cyclone dust collectors are arranged in the inner space of the fly-ash filter of describing with reference to Fig. 1 (ceramic filter/metallic filter),, are positioned at the dust-laden side of tube sheet 10 belows that is.Preferably, the longitudinal axis of cyclone dust collectors cylindrical shell 18 extends in identical direction with the longitudinal axis of ceramic filter/metallic filter.Synthesis gas after dedusting or the pre-separation is through the dust-laden side that is positioned at tube sheet 10 belows of cyclone dust collectors gas outlet tube 3, outlet divergent segment 5, vapor riser 6 entering ceramic filter/metallic filters in advance.Like this, the synthesis gas of the preparatory dedusting of process passes at least one filter element 11 further dedusting of quilt that is installed on the tube sheet 10, and the synthesis gas after the dedusting enters into the clean side that is positioned at tube sheet 10 tops; Flying dust is left on the surface of filter element 11; Form cake layer, along with cake layer thickens, filtering pressure drop increases; Be increased to preset value when filtering pressure drop; Start 7 pairs of filter elements of deashing device 11 and carry out pulse cleaning, flying dust falls in the flying dust feeder 14, and clean synthesis gas gets into subsequent handling through syngas outlet 9 discharge filter housings.
For preventing on cyclone dust collectors, to pile up when the blowback of ceramic filter cake layer from removing, the cylindrical shell 18 of preferred cyclone dust collectors overlaps with vapor riser 6, and the gas vent 3 of cyclone dust collectors is arranged in the tedge 6.Perhaps when cyclone dust collectors cylindrical shell 18 not exclusively overlaps with vapor riser 6, establish cone changeover portion (not shown), the gas vent 3 of cyclone dust collectors is arranged in the tedge 6, links to each other with vapor riser 6 through outlet divergent segment 5.
Tube sheet about in the of 10 both sides be that dust-laden side and clean side are respectively equipped with the entering that manhole 4 and 8 makes things convenient for the people, be used for installing and maintenance.
Fig. 3 is the profile of the composite flyash filter of the present invention shown in Fig. 2 at hatching line A-A place.The synthesis gas of taking dirt 13 enters into composite flyash filter of the present invention from the gas access; Get in the cyclone dust collectors inlet tube 2 of several parallelly connected cyclone dust collectors via gas distributor 12; In the present invention, the number of cyclone dust collectors is four, but should be understood that; This number can be provided with as required, such as 2,6 or 8 or the like.
Fig. 4 is the zoomed-in view of the composite flyash filter of the present invention shown in Fig. 2 at position shown in the circle.The synthesis gas of taking dirt enters into cyclone dust collectors cylindrical shell 18 from cyclone dust collectors inlet tube 2, and preferably the tangential along cyclone dust collectors cylindrical shell 18 gets into.This synthesis gas of taking dirt in cyclone dust collectors cylindrical shell 18 according to the cyclone dust removal principle by dedusting in advance, the flying dust of removing in advance falls, and enters in the flying dust feeder (14) via cyclone dust collectors cone 17 and dipleg 1.
In the present invention, for the dust accumulation that prevents to fall in filter element 11 deashing process on cyclone dust collectors, preferably can cyclone dust collectors inlet tube 2 and cyclone dust collectors cylindrical shell 18 towards on the surface on roof type accumulatingdust baffle plate 15 is set.
Fig. 5 is the cross sectional view at cyclone dust collectors inlet tube 2 places in Fig. 4, and wherein synthesis gas enters into cyclone dust collectors along the inlet 2 of tangential.Cyclone separator gas tangential inlet adopts the square-section runner, takes the dirt synthesis gas and directly gets in the cyclone separator with the square-section passage at gas distribution tube.
What deserves to be mentioned is, in the dust removal process of cyclone dust collectors, when a large amount of gas moves from the bottom up, might carry the flying dust of having removed, cause reentrainment of dust, reentrainment of dust is disadvantageous, preferably should suppress the generation of reentrainment of dust as far as possible.Usually, the running status of cyclone dust collectors is to discharge through vapor riser 6 from the gas outlet pipe 3 of top through the mainstream gas of preparatory dedusting, and the flying dust of removing dipleg 1 discharge from the bottom.But, in the cyclone dust collectors bottom, having some air-flow whirlpools sometimes and break away from mainstream gas, these air-flow whirlpools that break away from mainstream gas do not move upward, but along with flying dust moves downward.
The necessary condition that causes reentrainment of dust is the entrainment velocity of the speed of updraft greater than the relative flying dust of air-flow.Therefore, the present invention is provided with dipleg in the bottom of cyclone dust collectors, and the purpose that dipleg 1 is set is to increase the resistance that air-flow flows downward, make cyclone dust collectors downdraught amount in the underspeed in cyclone dust collectors space to reach the entrainment velocity of flying dust.
More preferably, 17 times vortex broken device 16 is set in the cyclone dust collectors cone, destroys rotatablely moving of downward whirlpool, this vortex broken device is preferably the cross vortex broken device, and this vortex broken device 16 is arranged on the ash port place of cyclone dust collectors cone 17.
Complex filter of the present invention;, crude synthesis gas dust is carried out preparatory dedusting before getting into ceramic filter element or metal filter element through cyclone dust removal; Like this, the fly ash content in the synthesis gas will significantly reduce, thereby the cake layer formation speed on filter element 11 surfaces also will significantly reduce; Under the situation that does not change preset deashing pressure drop; Can select time longer at interval deashing pattern because the reduction of reverse gas cleaning frequency, thereby also will be prolonged the live load that greatly reduces ceramic filter or metallic filter the service life of ceramic element; This makes the breakage of ceramic filter element or metal filter element to reduce greatly, has prolonged the service life of ceramic filter or metallic filter.Simultaneously owing to be to be built in ceramic filter or the metallic filter with cyclone dust collectors; Made full use of the inner space of ceramic filter or metallic filter; So cyclone dust collectors are incorporated into ceramic filter or metallic filter compactly, make equipment miniaturization.In addition; Also make and only adopt once the cover flying dust treating system and can satisfy the demand; And adopt independently cyclone dust collectors in the prior art and independently during ceramic filter/metallic filter, need two cover flying dust treating systems, each systematic economy cost and space cost are all very big.
Filter element among the present invention can adopt " ceramic filter element " also can be to use the sintered metal filtration element.
" composite flyash filter of built-in cyclone pre-dusting " of the present invention is so that be used in the coal gasification apparatus and describe for example; But should be understood that; " composite flyash filter of built-in cyclone pre-dusting " of the present invention also can use in other occasion except that coal gasification apparatus, for example field such as catalyst recovery, noble metal recovery.

Claims (11)

1. the composite flyash filter of a built-in cyclone pre-dusting comprises:
Filter housings, housing are provided with gas access (13) and gas vent (9);
Tube sheet (10); At least one filter element (11) is installed on this tube sheet (10); Said tube sheet (10) and said filter element (11) are divided into clean side and dust-laden side with said filter housings inner space together; Said gas access (13) is set in place on the filter head housings body portion of dust-laden side, and said gas vent (9) is set in place on the filter head housings body portion of clean side;
At least one cyclone dust collectors; These at least one cyclone dust collectors are arranged at the dust-laden side within the said filter housings; Each cyclone dust collectors has cyclone dust collectors cylindrical shell (18), be arranged on the inlet tube (2) of this cyclone dust collectors cylindrical shell (18) circumference tangential and be arranged on the cyclone dust collectors outlet (3) of this cyclone dust collectors cylindrical shell (18) upper end; Said inlet tube (2) is communicated with said gas access (13) fluid; Treat that through what said inlet tubes (2) entered into said cyclone dust collectors cylindrical shell (18) dedusting gas is by the preparatory dedusting of said cyclone dust collectors from said gas access (13); Gas after the dedusting flows out said cyclone dust collectors from said cyclone dust collectors outlet (3) in advance; The gas that flows out said cyclone dust collectors from said cyclone dust collectors outlet (3) is further filtered by said filter element (11), and the gas after the filtration enters into said clean side, and via said gas vent (9) outflow filter housing.
2. the composite flyash filter of built-in cyclone pre-dusting as claimed in claim 1 is characterized in that, said filter element (11) is ceramic filter element or sintered metal filtration element.
3. the composite flyash filter of built-in cyclone pre-dusting as claimed in claim 1 is characterized in that, the said inlet tube (2) of each cyclone dust collectors is communicated with said gas access (13) fluid via a gas distributor (12).
4. the composite flyash filter of built-in cyclone pre-dusting as claimed in claim 3 is characterized in that,
Said gas distributor has a plurality of outlets, and each outlet is provided with cyclone dust collectors, promptly the quantity of cyclone dust collectors and gas distributor to divide equally share quantity consistent.
5. the composite flyash filter of built-in cyclone pre-dusting as claimed in claim 1; It is characterized in that; Each said cyclone dust collectors outlet (3) top also correspondence is provided with a vapor riser (6); Said cyclone dust collectors cylindrical shell (18) is connected through the cone changeover portion with vapor riser (6); Cone half cone drift angle is between 10~45 °, and the axis of cyclone dust collectors cylindrical shell (18) overlaps with the axis of vapor riser (6), and cyclone dust collectors outlet (3) is arranged in the vapor riser (6).
6. the composite flyash filter of built-in cyclone pre-dusting as claimed in claim 5 is characterized in that, cyclone dust collectors outlet (3) links to each other with vapor riser (6) through outlet divergent segment (5).
7. like the composite flyash filter of one of claim 1-4 described built-in cyclone pre-dusting, it is characterized in that, roof type accumulatingdust baffle plate (15) is set in the top of said inlet tube (2) and cyclone dust collectors cylindrical shell (18).
8. like the composite flyash filter of one of claim 1-4 described built-in cyclone pre-dusting, it is characterized in that, be provided with vortex broken device (16) in said cyclone dust collectors bottom.
9. the composite flyash filter of built-in cyclone pre-dusting as claimed in claim 8 is characterized in that, said vortex broken device (16) is cross vortex broken device.
10. like the composite flyash filter of one of claim 1-4 described built-in cyclone pre-dusting, it is characterized in that, be provided with dipleg (1), increase resistance downdraught in said cyclone dust collectors bottom.
11. the composite flyash filter like one of claim 1-4 described built-in cyclone pre-dusting is characterized in that, the said dedusting gas of treating is synthetic gas.
CN200810146809XA 2008-08-25 2008-08-25 Composite flyash filter with built-in cyclone pre-dusting Active CN101658750B (en)

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CN103041651B (en) * 2012-12-18 2014-07-02 中国石油大学(北京) Pre-separation device for high temperature gas filter and filter adopting same
CN103055627B (en) * 2013-01-24 2014-07-16 中国石油大学(北京) Straight-flow type pre-separating device for high temperature gas filtration and filter of device
CN105126488B (en) * 2015-07-10 2017-03-15 中国化学工程第四建设有限公司 The method for changing fly-ash filter internal core

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Publication number Priority date Publication date Assignee Title
CN1244447A (en) * 1998-08-07 2000-02-16 彪万热斗株式会社 Cyclone separator and filter thereof
CN201333367Y (en) * 2008-08-25 2009-10-28 中国石油化工股份有限公司 Complex fly ash filter with cyclone inside for pre dust removal

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1244447A (en) * 1998-08-07 2000-02-16 彪万热斗株式会社 Cyclone separator and filter thereof
CN201333367Y (en) * 2008-08-25 2009-10-28 中国石油化工股份有限公司 Complex fly ash filter with cyclone inside for pre dust removal

Non-Patent Citations (1)

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JP特开2003-117323A 2003.04.22

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