CN104689649B - Recover the filter element method by property - Google Patents
Recover the filter element method by property Download PDFInfo
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- CN104689649B CN104689649B CN201510090780.8A CN201510090780A CN104689649B CN 104689649 B CN104689649 B CN 104689649B CN 201510090780 A CN201510090780 A CN 201510090780A CN 104689649 B CN104689649 B CN 104689649B
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Abstract
The invention discloses and a kind of recover the filter element method by property.The present invention recovers the filter element method by property, and the method includes the attachment injection rigid particles logistics on described filter element thus carries out impacting the link removed and touching, after above-mentioned impact removing link terminates, the link that attachment thermal transition is gaseous volatile making to remain on filter element again to described attachment by this rigid particles logistics.Carrying out touching the attachment thermal transition making to remain on filter element after impact is removed again to described attachment by rigid particles logistics is gaseous volatile, and filter element can be made to obtain deep regenerative.
Description
Technical field
The present invention relates separately to a kind of filter element cleaning method, filter and filtration system and recovers the filter element method by property.
Wherein, filter element is also known as filter element permeability by property, and filter element permeability is the highest, and under identical filtration pressure difference, filtration flux is the biggest.
Background technology
Carrying out gas solid separation filtration or solid-liquor separation and gradually can adhere to a metafiltration cake when filtering on the filter element of filter, filter cake is piled up
Will significantly reduce after to a certain extent filter element by property, be at this moment accomplished by filter element is cleaned processing with by above-mentioned attachment
Remove from filter element, thus recover filter element by property, extend the service life of filter element.As a example by gas solid separation filters: at present
The most frequently used filter element cleaning method is blowback, i.e. puts on filter element by a set of air feed equipment (back-blowing device) and filters with it
High pressure back draught in opposite direction, so that the attachments such as the dust of cartridge surface attachment are peeled off from filter element；It addition, existing skill
Art carries out mechanical damage or by direct face also by the scraper mechanism that can perform relative motion with filter element to the attachment on filter element
To the nozzle of filter element, the attachment on filter element carried out the filter element clean methods such as high-pressure jet purging.These methods above-mentioned or to filter element
Cleaning treatment effect undesirable, or technical sophistication, implement more difficulty.Particularly with filtering the dust-laden containing low pine than ash
The filter element of gas, due to dust not free settling when it filters, causes dust concentration in filter to increase fast, filter element and filter element it
Between easily pile up dust and form " ash is built bridge ", cause filter element blocking serious, general filter element cleaning method poor effect.
Summary of the invention
First the technical problem to be solved is to provide a kind of filter element cleaning that can effectively remove attachment on filter element and processes
Method；Secondly a kind of filter and filtration system that can effectively remove attachment on filter element be provided；In addition a kind of fortune is also provided
By the recovery filter element method by property of above-mentioned filter element cleaning method.
The filter element cleaning method of the present invention includes the attachment on described filter element is sprayed rigid particles logistics thus firm by this
Property granule logistics described attachment is carried out impact remove link.The method utilize rigid particles logistics to the attachment on filter element
Thing carries out the technological means that impact removes and combines gas impact mode and dual by scraper mechanism direct physical contact failure mode
Advantage, can effectively remove attachment on filter element, reaches preferable filter element cleaning treatment effect.
Above-mentioned impact is removed the diameter of the rigid particle used in link and is typically chosen in 0.5～5mm.Additionally, in this link
Rigid particle used is typically to form described rigid particles logistics with air-flow that pressure is 0.1～1.0Mpa as carrier.On
State rigid particle diameter and carrier gas stream pressure limit is suitable for the surface to existing filter element especially rigidity filter element and processes, the most right
The elimination effect of filter element attachment is notable, and cartridge surface will not cause significantly damage or other adverse effect simultaneously.Described " firm
Property filter element " generally refer to metal polyporous material filter element or ceramic porous material filter element.
Above-mentioned impact is removed link and is not being dismantled filter preferably by means of the rigid particle flow jet device installed in the filter
Directly realize in filter interior in the case of core, so that the method forms the one " online " as current back-flushing technique
Filter element cleaning processing mode, realize the most efficiently filter element cleaning process.The filter element cleaning method of the present invention can be not only used for
Process gas solid separation filter element for filtration it can also be used to process liquid-solid separating and filtering filter element.When the method is used for processing gas solid separation
Easily realize above-mentioned " online " filter element cleaning during filter element for filtration to process.
When the filter element cleaning method of the present invention processes gas solid separation filter element for filtration for " online ", it is proposed that above-mentioned impact
Remove rigid particle used in link and formed with air-flow that temperature is gas temperature more than 60% to be filtered as carrier described firm
Property granule logistics." gas to be filtered " refer to the filter element of cleaned process filter below duty to be ready for filtering
Gas.By rigid particle with air-flow that temperature is gas temperature more than 60% to be filtered as carrier, can prevent filter element because of with rigidity
Granule logistics contacts and quickly cools down, and causes the cooling phase transformation of filter element ambient substance to separate out and increase filter element blocking.When described filter element is
During high temperature air filtration filter element, rigid particle used typically can form institute with the thermal current of temperature 200～600 DEG C as carrier
The rigid particles logistics stated.
When the filter element cleaning method of the present invention processes gas solid separation filter element for filtration for " online ", " treat described
Filter gas " belong to when flammable explosive gas, above-mentioned impact is removed rigid particle used in link and is preferably with nitrogen
Or noble gas is that carrier forms described rigid particles logistics, thus reduce potential safety hazard.
When the filter element cleaning method of the present invention processes gas solid separation filter element for filtration for " online ", the method is all right
Be included in impact remove link terminate after will use after rigid particle be collected in the ash silo of filter bottom and with the ash in ash silo
The link of dirt mixing.It addition, the operation that the rigid particle after using carries out mixing with the dust in ash silo also can be by means of peace
Dress mechanical mixing device in the filter realizes, so that rigid particle and being more uniformly distributed that the dust in ash silo mixes.
The method further comprises the link carrying out unloading ash after the link carrying out mixing with dust at rigid particle terminates again.Work as rigidity
Particulate matter can improve the mobility of mixture greatly with the dust in ash silo after mixing, consequently facilitating by these dusts from ash silo
Draw off.So far, the filter element cleaning method of the present invention both can realize the high-efficiency cleaning to filter element, additionally it is possible to improves and follow-up unloads ash
The convenience of operation, kills two birds with one stone.
It addition, rigid particle used by the present invention above-mentioned filter element cleaning method can be selected from rustless steel granule, quartz sand particle,
In silicon-carbide particle, glass particle, zirconia particles, aluminium sesquioxide granule, cast particle, hard alloy particle any one
Plant or several.
The present invention recovers the filter element method by property, and the method includes the attachment on described filter element is sprayed rigid particles logistics
Thus carry out impacting the link removed and after above-mentioned impact removing link terminates to described attachment by this rigid particles logistics
Promote the link that attachment thermal transition is gaseous volatile of residual on filter element again.By rigid particles logistics, described attachment is entered
Row impact promotes the attachment thermal transition of residual on filter element to be gaseous volatile again after removing, filter element can be made to obtain deep regenerative.
Above-mentioned thermal transition link specifically includes and carries out the process of reactive combustion by oxygen with the attachment of residual on filter element.Owing to heat turns
Change and before link is implemented, first carried out impact removing link so that on filter element, the attachment of residual distributing homogeneity on filter element improves,
It is avoided by oxygen and acutely causes hot-spot with filter element local response burning when the attachment of residual carries out reactive combustion on filter element.
In the present invention above-mentioned recovery filter element method by property, link is removed in its impact can be by means of installing in the filter firm
Property particulate matter flow jet device and directly realize in filter interior in the case of not dismantling filter element.
In the present invention above-mentioned recovery filter element method by property, may additionally include impact and remove the rigidity after using after link terminates
Particulate matter is collected to the link mixed in the ash silo of filter bottom and with the dust in ash silo.
In the present invention above-mentioned recovery filter element method by property, may additionally include the link knot that rigid particle carries out mixing with dust
Shu Houzai carries out unloading the link of ash；This unloads after ash link completes and enters back into above-mentioned thermal transition link.
In the present invention above-mentioned recovery filter element method by property, the diameter one of the rigid particle used in link is removed in its impact
As be 0.5～5mm.Additionally, rigid particle used is to be generally the air-flow of 0.1～1.0Mpa with pressure to form institute as carrier
The rigid particles logistics stated.
In the present invention above-mentioned recovery filter element method by property, its impact is removed rigid particle used in link and with temperature is preferably
The air-flow of gas temperature more than 60% to be filtered is that carrier forms described rigid particles logistics.
In the present invention above-mentioned recovery filter element method by property, its impact remove in link rigid particle used can with nitrogen or
Noble gas is that carrier forms described rigid particles logistics.
In the present invention above-mentioned recovery filter element method by property, rigid particle used in link is removed in its impact can be selected from stainless
Steel particles, quartz sand particle, silicon-carbide particle, glass particle, zirconia particles, aluminium sesquioxide granule, cast particle,
In hard alloy particle any one or a few.
The filter of the present invention, including filter housings and the filter element being arranged in housing, is provided with in described housing and may act on
The rigid particle flow jet device of attachment on filter element.This filter is capable of in the case of not dismantling filter element directly in mistake
Inside filter, the attachment on filter element is sprayed rigid particles logistics thus by rigid particles logistics, the attachment on filter element is carried out
Impact is removed, and effectively removes attachment on filter element, reaches preferable filter element cleaning treatment effect.
Rigid particle flow jet device described in above-mentioned filter can farther include filter element sidepiece injection unit and/or filter element end
Portion's injection unit, described filter element sidepiece injection unit and/or filter element end injection unit are disposed with scattered specking.
Above-mentioned filter is suitable as filtering the pneumatic filter of Industrial Stoves institute grate furnace gas, and its underpart is provided with collection and is crossed leaching
The ash silo of dirt, in order to the collection of dust and discharge.This filter is also particularly suitable as the gas mistake filtering coal conversion gas
Filter, more particularly as the pneumatic filter filtering coal dry distilling furnace gas.Owing to coal converts gas especially coal gas retort
The particularity of gas, there is the problem that filter element contamination and plugging is serious in existing gas filtration technology, and the above-mentioned filter of the present invention and
Filter element cleaning method and recovery filter element can preferably solve filter element contamination and plugging problem by the method for property, therefore filtering coal
Charcoal converts has preferable application prospect on gas especially coal dry distilling furnace gas.
In order to utilize rigid particle flow jet device to eject rigid particle, the mobility of dust in ash silo is improved, just
In being drawn off from ash silo by these dusts, the bottom of described ash silo is provided with ash-discharging device, and this filter also includes the rigidity after using
Particulate matter is collected in described ash silo and the rigid particle that mixes with the dust in ash silo reclaims auxiliary and unloads ash structure.Described rigidity
Particulate matter recovery auxiliary is unloaded ash structure and also can further be included carrying out the rigid particle entered in ash silo with the dust in ash silo
The mechanical mixing device of mixing.The rigid particle removed after using after link terminates in impact is collected to filter bottom ash silo
In and mix with the dust in ash silo, the rigid particle after using carries out the operation that mixes with the dust in ash silo also can be by
Realize, so that rigid particle is the most equal with what the dust in ash silo mixed in installing mechanical mixing device in the filter
Even, the mobility of mixture can be improved with the dust in ash silo after rigid particle mixes greatly, consequently facilitating by these ashes
Dirt draws off from ash silo.
The filtration system of the present invention, for filtering the furnace gas that Industrial Stoves are discharged, it includes that filter, described filter include
Filter housings and the filter element being arranged in housing, the bottom of housing is provided with collects the ash silo being filtered dust, and the bottom of ash silo sets
There is ash-discharging device, the housing of this filter is provided with the rigid particle flow jet device that may act on attachment on filter element, and
This filter has the rigid particle that the rigid particle after using is collected to mix in described ash silo and with the dust in ash silo
Reclaim auxiliary and unload ash structure；This filtration system also includes sorting unit and the raw feedway of rigid particle miscarriage, and described sorting fills
Put receive by bottom ash silo ash-discharging device conveying material and therefrom isolate for rigid particle flow jet device rigidity
These rigid particles are also flowed to the raw feedway of rigid particle miscarriage by particulate matter, the raw supply of described rigid particle miscarriage
The rigid particle that sorting unit is carried by device and carrier gas stream carry out being mixed to form rigid particles logistics and flowing to rigid particles
Logistics injection apparatus.
The raw feedway of described rigid particle miscarriage specifically can include compressed gas source and pressurized canister, and the inner chamber of described pressurized canister is respectively
Being connected with the compressed gas delivery outlet of compressed gas source and the rigid particle delivery outlet of sorting unit by pipeline, pressurized canister is provided with
Rigid particles logistics delivery outlet, described rigid particles logistics delivery outlet is by the rigidity of pipeline with rigid particle flow jet device
Grain logistics input port connects.
Rigid particle flow jet device described in the filter of this filtration system can farther include filter element sidepiece injection unit and/
Or filter element end injection unit, described filter element sidepiece injection unit and/or filter element end injection unit are disposed with scattered specking.
Filter element described in said method of the present invention and equipment is preferably metal polyporous material filter element or ceramic porous material filter element.Gold
Genus polyporus material filter element and ceramic porous material filter element are rigid inorganic porous material filter element, and injection rigid particles logistics will not be led
Cause the significantly physical aspect change such as filter element deformation, damage, and rigid particle and rigid inorganic porous material contact friction
Greatly, filter element cleaning treatment effect is more preferable.
It is described further with detailed description of the invention below in conjunction with the accompanying drawings.Aspect that the present invention adds and advantage are by following description
Middle part is given out, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of detailed description of the invention of filtration system of the present invention.
Fig. 2 is the enlarged drawing of filter assemblies part in Fig. 1.
Fig. 3 be in Fig. 2 A-A to sectional view.
Fig. 4 is the structural representation of the another kind of detailed description of the invention of filter assemblies part shown in Fig. 2.
Detailed description of the invention
Fig. 1 to 4 show one, and for the filtration system filtering the discharged furnace gas of Industrial Stoves, it includes filter 100, should
Filter 100 includes filter housings 110, the filter element 120 being arranged in described housing 110 and for entering filter element 120
The back-blowing device of row reverse gas cleaning, the bottom of housing 110 is provided with collects the ash silo 160 being filtered dust, the bottom of ash silo 160
It is provided with ash-discharging device, the housing 110 of this filter 100 is provided with and may act on the rigid particle of attachment on filter element 110
Flow jet device 130, and this filter 100 have the rigid particle after rigid particle flow jet device 130 is used converge
The rigid particle mixed in collection extremely described ash silo 160 and with the dust in ash silo 160 reclaims auxiliary and unloads ash structure, this filtration system
System also includes sorting unit 200 and the raw feedway 300 of rigid particle miscarriage, and sorting unit 200 received by ash silo 160 end
The material of portion ash-discharging device conveying and therefrom isolate for rigid particle flow jet device 130 rigid particle and general
It flows to the raw feedway 300 of rigid particle miscarriage, and the raw feedway 300 of rigid particle miscarriage is by sorting unit 200
The rigid particle of conveying and carrier gas stream are mixed to form rigid particles logistics and flow to rigid particle flow jet device 130.
Wherein, described sorting unit 200 can use the most multiple screening installation that can be used for separating different-grain diameter solid particle.
Such as Fig. 1, specifically one bottom of above-mentioned filter housings 110 is the cylinder of taper, in the lower tapered portion of this cylinder
Portion forms described ash silo 160；Being provided with orifice plate 112 in cylinder, the top being positioned at orifice plate 112 in cylinder forms air-purifying chamber 111,
It is positioned at the Primordial Qi room 113 formed below of orifice plate 112 in cylinder, cylinder lateral wall is respectively equipped with air inlet 114 and air vent 115,
Described air inlet 114 turns on Primordial Qi room 113, and air vent 115 turns on air-purifying chamber 111；Interval row on described orifice plate 112
Row are provided with at least two filter assemblies, and each filter assemblies includes that many upper ends (opening) are spaced and is arranged on orifice plate 112
On tubulose filter element 120, these filter elements 120 are vertically arranged in cylinder, and their lower end (blind end) can unsettled be arranged
Can also be connected on special filter element location structure, the lower end of filter element 120 is connected on filter element location structure, is possible to prevent
In filter running, filter element 120 occurs significantly to swing, and has and avoids advantages such as colliding between filter element 120；Above-mentioned
Filter element 120 described in filtration system specifically uses metal polyporous material filter element or ceramic porous material filter element；Described back-blowing device bag
Including the Wen's anti-blowpipe 151 being positioned in air-purifying chamber 111, the top of each filter assemblies is correspondingly provided with Wen's anti-blowpipe 151,
The big of each Wen's anti-blowpipe 151 holds down filter element 120 upper port all of with corresponding filter assemblies conducting, each Wen the most simultaneously
The small end of anti-blowpipe 151 upward, is correspondingly arranged on high speed nozzle 152, high speed nozzle above the small end of each Wen's anti-blowpipe 151
152 are connected by the compressed gas source of pipe-and-filter 100.
In above-mentioned filter 100, described rigid particle flow jet device 130 can be provided only with filter element sidepiece injection unit 131.
Specifically, such as Fig. 2 to 3, this filter element sidepiece injection unit 131 includes outside filter element side spray in injection unit 131a and filter element
Penetrating unit 131b, in a filter assemblies, the outside of this filter assemblies, should to there being injection unit 131a outside one group of filter element
The inner side of filter assemblies is to there being injection unit 131b inside one group of filter element, outside described filter element in injection unit 131a and filter element
All having scattered specking on the injection unit 131b of side, outside filter element, inside injection unit 131a and filter element, injection unit 131b is respectively
Ecto-entad and from inside to outside injection rigid particles logistics, thus by these rigid particles logistics to filter element 120 in filter assemblies
On attachment carry out impact remove.Such as Fig. 2 to 3, outside above-mentioned filter element, injection unit 131a specifically includes many toroidal nozzles
131a1, these toroidal nozzles 131a1 are enclosed within outside filter assemblies and are spaced along axial (vertical direction) of filter assemblies,
On the inner ring of toroidal nozzle 131a1, interval or continuous print are provided with spout 131a2；Inside filter element, injection unit 131b includes that many set
Between filter element 120 and parallel with these filter elements 120 vertical jet pipe 131b1, installs bottom these vertical jet pipe 131b1
On the conduction pipe 131b2 being positioned at below filter assemblies, on each vertical jet pipe 131b1, interval or continuous print are provided with spout.
Rigid particles logistics can be by the feed pipe being connected with toroidal nozzle 131a1 and the feed pipe being connected with conduction pipe 131b2
Road outside above-mentioned filter element inside injection unit 131a and filter element injection unit 131b carry rigid particles logistics.Outside this filter element
Inside injection unit 131a and filter element, injection unit 131b can carry out comprehensive, the rigidity of multi-angle to whole filter assemblies
Grain logistics impact removing processes, and both can well abolish " ash is built bridge " between filter element 120, it is possible to filter element 120 surface
Attachment is removed comprehensively.
In above-mentioned filter 100, described rigid particle flow jet device 130 can also be provided only with filter element end injection unit 132.
Specifically, as shown in Figure 4, in a filter assemblies, described filter element end injection unit 132 includes being positioned at this filtration group
Conduction pipe 132a1 below part, on described conduction pipe 132a1, dispersed placement has multiple spout 132a2 the most upwards sprayed.
Rigid particles logistics is mainly sprayed in gap between filter element 120 and filter element 120 by above-mentioned these spouts 132a2, and emphasis abolishes filter
" ash is built bridge " between core 120.Owing to the Main Function of the rigid particle flow jet device 130 shown in Fig. 4 is to abolish filter
" ash is built bridge " between core 120, therefore, clears up for filter element 120 surface attachments and is mainly also dependent on above-mentioned blowback dress
Put and realize.I.e., it is possible to " ash is built bridge " that first pass through between 132 filter elements 120 of injection unit of above-mentioned filter element end abolishes,
Then restarting back-blowing device, such reverse gas cleaning effect can be more preferably.
Such as Fig. 1, the raw feedway 300 of rigid particle miscarriage in above-mentioned filtration system specifically can include compressed gas source 310 He
Pressurized canister 320, the inner chamber of described pressurized canister 320 is respectively by pipeline and the compressed gas delivery outlet of compressed gas source 310 and sorting
The rigid particle delivery outlet of device 200 connects, and pressurized canister 320 is provided with rigid particles logistics delivery outlet, described rigid particles
Logistics delivery outlet is connected with the rigid particles logistics input port of rigid particle flow jet device 130 by pipeline.It addition, in order to
It is easy to regulate rigid particle and the ratio of carrier gas stream in rigid particles logistics, sprays with rigid particles logistics in pressurized canister 320
Regulation valve 330, this regulation valve 330 1 aspect and pressurized canister it is additionally provided with on rigid particles logistics conveyance conduit between device 130
The rigid particles logistics delivery outlet of 320 connects, and is on the one hand connected with compressed gas source 310, can make in compressed gas source 310
Gas is mixed in adjustable ratio with the rigid particles logistics from pressurized canister 320, and the outlet of regulation valve 330 is passed through again
Pipeline is connected with the rigid particles logistics input port of rigid particle flow jet device 130.
As it has been described above, the rigid particle that this filter 100 has after being used by rigid particle flow jet device 130 is collected to
The rigid particle mixed in described ash silo 160 and with the dust in ash silo 160 reclaims auxiliary and unloads ash structure.In gas filtration,
Except to be solved the most more preferably being removed from filter element by the attachment on filter element 120 of emphasis of the present invention, thus recover filter element 120
By property, extend outside the technical problem in filter element 120 service life, the dust that will filter out is discharged from filter 100 and is also
The problem often perplexing working site.The general particle diameter of dust owing to filtering out is the least, the very light weight of dust, and gravity unloads ash pole
For difficulty, therefore purge the mode such as (abolishing dedusting fouling), regulation ash silo cinder-discharging port external and internal pressure toward contact compressed gas to be aided with,
Add operation easier.And the rigid particle relatively dust weight that the rigid particle flow jet device 130 of the present invention is used, will
Rigid particle flow jet device 130 use after rigid particle be collected in described ash silo 160 and with the ash in ash silo 160
After dirt mixing, mixture mobility under gravity will be greatly promoted, reduce and unload ash difficulty.
In the filter 100 shown in Fig. 1, it is not required to particularly design rigid particle flow jet device 130 just can be made to make
Rigid particle after with is the most naturally collected in described ash silo 160.Additionally, above-mentioned rigid particle reclaims
Auxiliary unloads the mechanical batch mixing dress that ash structure also includes carrying out the rigid particle entered in ash silo 160 with the dust in ash silo mixing
Put 140, so that rigid particle and being more uniformly distributed that the dust in ash silo 160 mixes, promote the side unloading ash manipulation further
Just property.Such as Fig. 1, described machinery mixing device 140 specifically can include that an external impetus mechanism 141 and one end are moved with outside
Force mechanisms 141 connects and the other end stretches into the power transmission shaft (non-label in figure) within ash silo 160, and this power transmission shaft is provided with stirring
Blade 142.Above-mentioned external impetus mechanism 141 can drive power transmission shaft and and then drive stirring vane 142 in ash silo 160 inward turning
Turn, thus promote that rigid particle mixes with the dust in ash silo.
The running of the above-mentioned filtration system of the present invention is:
(1) when filtering, gas to be filtered enters in Primordial Qi room 113 from air inlet 114 and then moves to filter element 120, by filter
Clean gas after core 120 filters enters air-purifying chamber 111 from filter element 120 upper port, is then discharged by air vent 115 and filters
Device 100, is attached to a metafiltration cake causes filter efficiency to decline when filtering filter element 120 outer surface after a period of time, now, and startup
Back-blowing device, blowback working gas sprays into Wen's anti-blowpipe 151 from high speed nozzle 152, further from each filter element 120
It is internal that port enters filter element 120, and hereafter the filter cake of reverse impact filter element 120 outer surface is further continued for filtering.
(2) work in a manner described after a period of time, initially form " ash is built bridge " between filter element 120, simultaneously on filter element 120
Filter cake be also increasingly difficult to be removed by blowback, at this moment, start rigid particle flow jet device 130, thus to described
Attachment on filter element 120 sprays rigid particles logistics thus by this rigid particles logistics, described attachment is carried out impact clearly
Remove, wherein, described rigid particles logistics be by a diameter of 0.5～5mm rigid particle with gas that pressure is 0.1～1.0Mpa
Stream formed for carrier, described rigid particle selected from rustless steel granule, quartz sand particle, silicon-carbide particle, glass particle,
In zirconia particles, aluminium sesquioxide granule, cast particle, hard alloy particle any one or a few.
(3) rigid particle after using is collected in filter 100 bottom ash silo 160 naturally, then starts machinery batch mixing
Device 140 makes rigid particle uniformly mix with dust, hereafter opens ash silo 160 bottom discharge valve and carries out unloading ash；Filled by sorting
Put 200 receptions by the material of ash-discharging device conveying bottom ash silo 160 and therefrom to isolate for rigid particle flow jet device 130
These rigid particles are also flowed to the raw feedway 300 of rigid particle miscarriage, rigid particles by the rigid particle that used
The rigid particle that sorting unit 200 is carried by logistics generation feedway 300 if desired is mixed to form rigidity with carrier gas stream
Rigid particles logistics needed for grain logistics injection apparatus 130.
Embodiment 1
This embodiment is specifically related to the filtering technique of a kind of Coal at Low Temperature gas retort furnace gas.Described furnace gas is after gas retort overflows, logical
Cross gravitational precipitator or cyclone dust extractor carries out preliminary solid and gas and separates, then immediately proceed to Fig. 1 and enter to the filtration system shown in 3
Row dust removal by filtration purifies.Under normal operating conditions, filtration system carries out periodically switching between " filtration-blowback ".Often by normal
Duty is run 15 minutes, then start rigid particle flow jet device 130, with the nitrogen that pressure is about 0.6Mpa be
Whole filter assemblies is sprayed by the rigid particles logistics that carrier gas stream drives the quartz sand particle of a diameter of 0.8～2.5mm to be formed
Penetrating process, AEI After End of Injection starts the quartz sand particle after machinery mixing device 140 will use and carries out with the dust in ash silo 160
Mixing, hereafter opens ash silo 160 bottom discharge valve and carries out unloading ash.Owing to the tar content of Coal at Low Temperature gas retort furnace gas is relatively big,
Easily separating out and block filter element duct, above-mentioned blowback and rigid particles logistics impact on filter element 120 all can not fully erased filter element 120
On attachment, therefore, in the Primordial Qi room 113 of filter 100, after taking to unload ash, be slowly passed through the mixing of nitrogen and air again
Gas, in this gaseous mixture, the percent by volume of oxygen controls 3～6%, owing in Primordial Qi room 113, self-temperature is the highest, gaseous mixture
In oxygen and filter element on the material such as tar of residual react rapidly burning so that the material thermal transitions such as tar are gaseous state volatilization
Thing, makes filter element 120 obtain the cleaning regeneration of the degree of depth.Owing to first having carried out rigid particles logistics impact and having unloaded ash, can be avoided by
On oxygen and filter element the attachment of residual carry out during reactive combustion filter element hot-spot and ash silo 160 in the feelings of generation vigorous combustion
Condition generation, it is ensured that the safety of above-mentioned thermal transition link.
Claims (10)
1. recover the filter element method by property, it is characterised in that: the method includes that the attachment on described filter element is sprayed rigid particles logistics thus carries out impacting the link removed and promoting the link that attachment thermal transition is gaseous volatile of residual on filter element again after above-mentioned impact removing link terminates to described attachment by this rigid particles logistics.
2. the method for claim 1, it is characterised in that: above-mentioned impact is removed link and is by mean of installing rigid particle flow jet device in the filter and directly realizes in filter interior in the case of not dismantling filter element.
3. method as claimed in claim 2, it is characterised in that: the method is additionally included in impact and removes the link that the rigid particle after using after link terminates is collected to mix in the ash silo of filter bottom and with the dust in ash silo.
4. method as claimed in claim 3, it is characterised in that: the method is additionally included in after the link that rigid particle carries out mixing with dust terminates and carries out unloading grey link again；This unloads after ash link completes and enters back into above-mentioned thermal transition link.
5. the method as described in any one claim in Claims 1-4, it is characterised in that: a diameter of 0.5～5mm of the rigid particle used in link is removed in above-mentioned impact.
6. the method as described in any one claim in Claims 1-4, it is characterised in that: it is to form described rigid particles logistics with air-flow that pressure is 0.1～1.0MPa as carrier that rigid particle used in link is removed in above-mentioned impact.
7. the method as described in any one claim in Claims 1-4, it is characterised in that: it is to form described rigid particles logistics with air-flow that temperature is gas temperature more than 60% to be filtered as carrier that rigid particle used in link is removed in impact.
8. the method as described in any one claim in Claims 1-4, it is characterised in that: it is to form described rigid particles logistics with noble gas as carrier that rigid particle used in link is removed in above-mentioned impact.
9. the method as described in any one claim in Claims 1-4, it is characterised in that: above-mentioned impact is removed rigid particle used in link and is selected from rustless steel granule, quartz sand particle, silicon-carbide particle, glass particle, zirconia particles, aluminium sesquioxide granule, cast particle, hard alloy particle any one or a few.
10. the method as described in any one claim in Claims 1-4, it is characterised in that: above-mentioned thermal transition link includes carrying out the process of reactive combustion by oxygen with the attachment of residual on filter element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090780.8A CN104689649B (en) | 2015-02-28 | 2015-02-28 | Recover the filter element method by property |
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| CN201510090780.8A CN104689649B (en) | 2015-02-28 | 2015-02-28 | Recover the filter element method by property |
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| CN104689649A CN104689649A (en) | 2015-06-10 |
| CN104689649B true CN104689649B (en) | 2016-12-07 |
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| CN201510090780.8A Active CN104689649B (en) | 2015-02-28 | 2015-02-28 | Recover the filter element method by property |
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| CN110935695B (en) * | 2019-11-29 | 2021-09-07 | 湖南安福环保科技股份有限公司 | Automatic cleaning device of melten gel filter screen |
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