CN104667650A - Filter element cleaning method - Google Patents
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- CN104667650A CN104667650A CN201510090580.2A CN201510090580A CN104667650A CN 104667650 A CN104667650 A CN 104667650A CN 201510090580 A CN201510090580 A CN 201510090580A CN 104667650 A CN104667650 A CN 104667650A
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Abstract
The invention discloses a filter element cleaning method which can be used for effectively removing attached objects on a filter element. The method is used for spraying rigid particles to attached objects on the filter element so that the link of impacting and cleaning the attached objects is carried out by a rigid particle flow. According to the method, a technical means of impacting and cleaning the attached objects on the filter element by using the rigid particle flow has dual advantages of a gas impacting manner and a direct physical contact damaging manner by a scraping mechanism, so that the attached objects on the filter element can be effectively removed and the ideal filter element cleaning effect is realized.
Description
Technical field
The present invention relates separately to a kind of filter core cleaning method, filter and filtration system and recovers the method for filter core by property.Wherein, filter core is also called filter core permeability by property, and filter core permeability is higher, and under identical filtration pressure difference, filtration flux is larger.
Background technology
One deck filter cake can be adhered to gradually on the filter core of filter when carrying out gas solid separation filtration or solid-liquor separation filtration, filter cake is stacked into the property passed through that significantly will reduce filter core to a certain degree, at this moment just need to carry out cleaning to be removed from filter core by above-mentioned attachment to filter core, thus recover filter core by property, extend service life of filter core.Example is filtered into: filter core cleaning method the most frequently used is at present blowback with gas solid separation, namely put on the filter core high pressure back draught contrary with its filtering direction by a set of air feed equipment (back-blowing device), the attachments such as the dust adhered to make cartridge surface are peeled off from filter core; In addition, the scraper mechanism by relative motion can be done with filter core is also had to carry out mechanical damage to the attachment on filter core or carry out the filter core clean methods such as high-pressure jet purging by the direct nozzle towards filter core to the attachment on filter core in prior art.These methods above-mentioned or undesirable to filter core cleaning effect, or technical sophistication, implement comparatively difficulty.Especially for filtering containing the filter core of low pine than the dusty gas of ash content, due to dust not free settling when it filters, dust concentration in filter is caused to increase fast, easily pile up dust between filter core and filter core to be formed " ash is built bridge ", filter core is caused to block serious, general filter core cleaning method poor effect.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of filter core cleaning method effectively can removing attachment on filter core; Next provides a kind of filter and the filtration system that effectively can remove attachment on filter core; A kind of recovery filter core using above-mentioned filter core cleaning method will be provided in addition by the method for property.
Filter core cleaning method of the present invention comprises the attachment injection rigid particles logistics on described filter core thus carries out impacting the link removed to described attachment by this rigid particles logistics.Utilize rigid particles logistics to carry out impacting the technological means removed to the attachment on filter core in the method and combine gas impact mode and the two-fold advantage by scraper mechanism direct physical contact failure mode, can effectively remove attachment on filter core, reach desirable filter core cleaning effect.
The diameter that the rigid particle used in link is removed in above-mentioned impact is typically chosen in 0.5 ~ 5mm.In addition, in this link, rigid particle used is generally that the air-flow of 0.1 ~ 1.0Mpa is for carrier and form described rigid particles logistics with pressure.Above-mentioned rigid particle diameter and carrier gas stream pressure limit are applicable to the surface treatment to existing filter core especially rigidity filter core, not only remarkable to the elimination effect of filter core attachment, can not cause significantly damage or other adverse effect to cartridge surface simultaneously.Described " rigidity filter core " generally refers to metal polyporous material filter core or ceramic porous material filter core.
Above-mentioned impact is removed link and is preferably directly realized in filter interior when not dismantling filter core by means of the rigid particle flow jet device installed in the filter, thus make the method form the filter core cleaning mode of the one " online " same with current back-flushing technique, easily realize filter core cleaning efficiently.Filter core cleaning method of the present invention both can be used for process gas solid separation filter element for filtration, also can be used for processing liquid-solid separating and filtering filter core.When the method is for the treatment of easily realizing above-mentioned " online " filter core cleaning during gas solid separation filter element for filtration.
When filter core cleaning method of the present invention is used for " online " process gas solid separation filter element for filtration, advising in above-mentioned impact removing link that rigid particle used take temperature as the air-flow of gas temperature more than 60% to be filtered is carrier and form described rigid particles logistics." gas to be filtered " refers to the filter core of the cleaned process gas that right preparation is filtered below filtration duty.By rigid particle with temperature be the air-flow of gas temperature more than 60% to be filtered for carrier, can prevent filter core from cooling fast because contacting with rigid particles logistics, cause filter core ambient substance lower the temperature phase transformation separate out and increase filter core blocking.When described filter core is high temperature air filtration filter core, rigid particle used can the thermal current of temperature 200 ~ 600 DEG C be generally that carrier forms described rigid particles logistics.
When filter core cleaning method of the present invention is used for " online " process gas solid separation filter element for filtration, under described " gas to be filtered " belongs to the situations such as flammable explosive gas, above-mentioned impact to remove in link rigid particle used preferably with nitrogen or inert gas for carrier and form described rigid particles logistics, thus reduce potential safety hazard.
When filter core cleaning method of the present invention is used for " online " process gas solid separation filter element for filtration, the method can also be included in impact to remove after link terminates and the rigid particle after use is collected to the link mixed in the ash silo of filter bottom and with the dust in ash silo.In addition, by use after rigid particle also can realize by means of the mechanical mixing device installed in the filter with the operation that the dust in ash silo carries out mixing, thus rigid particle is mixed with the dust in ash silo more even.The method further comprises the link of carrying out unloading ash after the link of carrying out mixing at rigid particle and dust terminates again.The mobility of mixture can be improved greatly after rigid particle mixes with the dust in ash silo, thus be convenient to these dusts to draw off from ash silo.So far, filter core cleaning method of the present invention both can realize the high-efficiency cleaning to filter core, can also improve the follow-up convenience unloading ash manipulation, kill two birds with one stone.
In addition, the present invention's above-mentioned filter core cleaning method rigid particle used can be selected from stainless steel particle, quartz sand particle, silicon-carbide particle, glass particle, zirconia particles, alundum (Al2O3) particle, cast particle, hard alloy particle any one or a few.
Recovery filter core of the present invention is by the method for property, and the method comprises spraying rigid particles logistics to the attachment on described filter core thus being carried out impacting the link removed by this rigid particles logistics to described attachment and remove to touch after link terminates in above-mentioned impact again makes attachment thermal transition residual on filter core be the link of gaseous volatile.Touching after carrying out impacting removing by rigid particles logistics to described attachment makes attachment thermal transition residual on filter core be gaseous volatile again, and filter core can be made to obtain deep regenerative.
Above-mentioned thermal transition link specifically comprises the process of being carried out reactive combustion by attachment residual on oxygen and filter core.Owing to first having carried out impacting before the enforcement of thermal transition link removing link, to make on filter core the distributing homogeneity of residual attachment on filter core improve, when avoiding the attachment by oxygen and filter core remain to carry out reactive combustion, filter core local reaction is burnt and is acutely caused hot-spot.
In the method for the above-mentioned recovery filter core of the present invention by property, its impact removing link directly can realize in filter interior when not dismantling filter core by means of the rigid particle flow jet device installed in the filter.
In the method for the above-mentioned recovery filter core of the present invention by property, also can be included in after impact removing link terminates and the rigid particle after use is collected to the link mixed in the ash silo of filter bottom and with the dust in ash silo.
In the method for the above-mentioned recovery filter core of the present invention by property, also can be included in the link of carrying out unloading ash after rigid particle terminates with the link that dust carries out mixing again; This unloads after grey link completes and enters above-mentioned thermal transition link again.
In the method for the above-mentioned recovery filter core of the present invention by property, it impacts the diameter removing the rigid particle used in link and is generally 0.5 ~ 5mm.In addition, rigid particle used is that the air-flow being generally 0.1 ~ 1.0Mpa with pressure forms described rigid particles logistics for carrier.
In the method for the above-mentioned recovery filter core of the present invention by property, it impacts that to remove rigid particle used in link be preferably the air-flow of gas temperature more than 60% to be filtered with temperature is carrier and form described rigid particles logistics.
In the method for the above-mentioned recovery filter core of the present invention by property, it impacts, and to remove in link rigid particle used can also nitrogen or inert gas be that carrier forms described rigid particles logistics.
In the method for the above-mentioned recovery filter core of the present invention by property, it impacts removes rigid particle used in link and can be selected from stainless steel particle, quartz sand particle, silicon-carbide particle, glass particle, zirconia particles, alundum (Al2O3) particle, cast particle, hard alloy particle any one or a few.
Filter of the present invention, comprises filter housings and is arranged on the filter core in housing, be provided with the rigid particle flow jet device that can act on attachment on filter core in described housing.This filter can to realize when not dismantling filter core directly spraying rigid particles logistics in filter interior to the attachment on filter core thus carrying out impacts removing by rigid particles logistics to the attachment on filter core, attachment on effective removal filter core, reaches desirable filter core cleaning effect.
Rigid particle flow jet device described in above-mentioned filter can comprise filter core sidepiece injection unit and/or filter core end injection unit further, and described filter core sidepiece injection unit and/or filter core end injection unit are furnished with the specking of dispersion.
Above-mentioned filter is applicable to the pneumatic filter as filtering Industrial Stoves institute grate furnace gas, and its underpart is provided with the ash silo of collecting and being filtered dust, so that the collection of dust and discharge.This filter is also specially adapted to the pneumatic filter as filtering coal conversion gas, more particularly as the pneumatic filter filtering coal destructive distillation furnace gas.Due to the particularity of coal conversion gas especially coal destructive distillation furnace gas, there is the serious problem of filter core contamination and plugging in existing gas filtration technology, and the above-mentioned filter of the present invention and filter core cleaning method can solve filter core contamination and plugging problem with recovery filter core preferably by the method for property, therefore on filtration coal conversion gas especially coal destructive distillation furnace gas, there is good application prospect.
Eject rigid particle to utilize rigid particle flow jet device to improve the mobility of dust in ash silo, these dusts are convenient to draw off from ash silo, the bottom of described ash silo is provided with ash-discharging device, this filter also comprise by use after rigid particle be collected to rigid particle mix in described ash silo and with the dust in ash silo reclaim assist unload grey structure.Described rigid particle reclaims and auxiliaryly unloads grey structure and also further can comprise the mechanical mixing device rigid particle entered in ash silo and the dust in ash silo being carried out mixing.Rigid particle after using to be collected in the ash silo of filter bottom and to mix with the dust in ash silo impacting to remove after link terminates, rigid particle after using also can be realized by means of the mechanical mixing device installed in the filter with the operation that the dust in ash silo carries out mixing, thus rigid particle is mixed with the dust in ash silo more even, the mobility of mixture can be improved greatly after rigid particle mixes with the dust in ash silo, thus be convenient to these dusts to draw off from ash silo.
Filtration system of the present invention, for filtering the furnace gas that Industrial Stoves discharge, it comprises filter, described filter comprises filter housings and is arranged on the filter core in housing, the bottom of housing is provided with the ash silo of collecting and being filtered dust, the bottom of ash silo is provided with ash-discharging device, be provided with the rigid particle flow jet device that can act on attachment on filter core in the housing of this filter, and this filter have by use after rigid particle be collected to rigid particle mix in described ash silo and with the dust in ash silo reclaim assist unload grey structure; This filtration system also comprises sorting unit and the raw feedway of rigid particle miscarriage, described sorting unit receive the material carried by ash-discharging device bottom ash silo and therefrom isolate for rigid particle flow jet device rigid particle and these rigid particles are flowed to rigid particle and to miscarry raw feedway, the rigid particle that sorting unit is carried by described rigid particle miscarriage life feedway and carrier gas stream carry out being mixed to form rigid particles logistics and flow to rigid particle flow jet device.
The raw feedway of described rigid particle miscarriage specifically can comprise compressed gas source and pressurized canister, the inner chamber of described pressurized canister is connected with the Compressed Gas delivery outlet of compressed gas source and the rigid particle delivery outlet of sorting unit respectively by pipeline, pressurized canister is provided with rigid particles logistics delivery outlet, and described rigid particles logistics delivery outlet is connected with the rigid particles logistics input port of rigid particle flow jet device by pipeline.
Rigid particle flow jet device described in the filter of this filtration system can comprise filter core sidepiece injection unit and/or filter core end injection unit further, and described filter core sidepiece injection unit and/or filter core end injection unit are furnished with the specking of dispersion.
Said method of the present invention and the filter core described in equipment are preferably metal polyporous material filter core or ceramic porous material filter core.Metal polyporous material filter core and ceramic porous material filter core are rigid inorganic porous material filter core, spray rigid particles logistics and can not cause the significantly physical aspect change such as filter core distortion, damage, and the contact friction of rigid particle and rigid inorganic porous material is large, filter core cleaning better effects if.
Be described further below in conjunction with the drawings and specific embodiments.The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by 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 the part of filter assemblies shown in Fig. 2.
Detailed description of the invention
Fig. 1 to 4 be depicted as one for filter Industrial Stoves discharge the filtration system of furnace gas, it comprises filter 100, this filter 100 comprises filter housings 110, be arranged on the filter core 120 in described housing 110 and the back-blowing device for carrying out reverse gas cleaning to filter core 120, the bottom of housing 110 is provided with the ash silo 160 of collecting and being filtered dust, the bottom of ash silo 160 is provided with ash-discharging device, the rigid particle flow jet device 130 that can act on attachment on filter core 110 is provided with in the housing 110 of this filter 100, and this filter 100 has the rigid particle 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 and reclaims and auxiliary unload grey structure, this filtration system also comprises sorting unit 200 and the raw feedway 300 of rigid particle miscarriage, sorting unit 200 receive by bottom ash silo 160 ash-discharging device carry material and therefrom isolate for rigid particle flow jet device 130 rigid particle and flowed to rigid particle miscarry give birth to feedway 300, the rigid particle that sorting unit 200 is carried by the raw feedway 300 of rigid particle miscarriage 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 adopt the multiple screening installation that can be used for being separated different-grain diameter solid particle at present.
As Fig. 1, an above-mentioned filter housings 110 specifically bottom is the cylindrical shell of taper, the ash silo 160 described in the formation of lower tapered portion inside of this cylindrical shell; Orifice plate 112 is provided with in cylindrical shell, the top being positioned at orifice plate 112 in cylindrical shell forms air-purifying chamber 111, the below being positioned at orifice plate 112 in cylindrical shell forms Primordial Qi room 113, cylinder lateral wall is respectively equipped with air inlet 114 and exhaust outlet 115, described air inlet 114 and Primordial Qi room 113 conducting, exhaust outlet 115 and air-purifying chamber 111 conducting; Described orifice plate 112 is spaced at least two filter assemblies are installed, each filter assemblies comprises many upper ends (openend) and is spaced the tubulose filter core 120 be arranged on orifice plate 112, these filter cores 120 are vertically arranged in cylindrical shell, their lower end (blind end) can unsettled setting also can be connected on special filter core location structure, the lower end of filter core 120 is connected on filter core location structure, can prevent filter core 120 in filter running from occurring significantly to swing, have and avoid advantages such as colliding between filter core 120; Filter core 120 described in above-mentioned filtration system specifically adopts metal polyporous material filter core or ceramic porous material filter core; Described back-blowing device comprises the Wen's anti-blowpipe 151 being arranged in air-purifying chamber 111, the top correspondence of each filter assemblies is provided with Wen's anti-blowpipe 151, the large end of each Wen's anti-blowpipe 151 down and simultaneously with filter core 120 upper port conductings all in corresponding filter assemblies, the small end of each Wen's anti-blowpipe 151 upward, above the small end of each Wen's anti-blowpipe 151, correspondence is provided with high speed nozzle 152, and high speed nozzle 152 is connected by the compressed gas source of pipe-and-filter 100.
In above-mentioned filter 100, described rigid particle flow jet device 130 only can be provided with filter core sidepiece injection unit 131.Specifically, as Fig. 2 to 3, this filter core sidepiece injection unit 131 to comprise outside filter core injection unit 131b inside injection unit 131a and filter core, in a filter assemblies, the outside of this filter assemblies is to there being injection unit 131a outside one group of filter core, the inner side of this filter assemblies is to there being injection unit 131b inside one group of filter core, inside injection unit 131a and filter core, injection unit 131b all there is the specking of dispersion outside described filter core, injection unit 131b ecto-entad and spray rigid particles logistics from inside to outside respectively inside injection unit 131a and filter core outside filter core, thus by these rigid particles logistics, impact removing is carried out to the attachment on filter core in filter assemblies 120.As Fig. 2 to 3, outside above-mentioned filter core, injection unit 131a specifically comprises many toroidal nozzle 131a1, these toroidal nozzles 131a1 is enclosed within outside filter assemblies and along the axis (vertical direction) of filter assemblies and is spaced, and on the inner ring of toroidal nozzle 131a1, interval or continuous print are provided with spout 131a2; Inside filter core, injection unit 131b comprises many and is located between filter core 120 and parallel with these filter cores 120 vertical jet pipe 131b1, be arranged on bottom these vertical jet pipe 131b1 on the conduction pipe 131b2 be positioned at below filter assemblies, on each vertical jet pipe 131b1, interval or continuous print are provided with spout.Rigid particles logistics carries rigid particles logistics by the feed pipe be connected with toroidal nozzle 131a1 and the feed pipe be connected with conduction pipe 131b2 to injection unit 131b inside injection unit 131a outside above-mentioned filter core and filter core.Outside this filter core, inside injection unit 131a and filter core, injection unit 131b can carry out rigid particles logistics that is comprehensive, multi-angle to whole filter assemblies and impacts and remove process, both can well abolish " ash is built bridge " between filter core 120, also can remove the attachment on filter core 120 surface comprehensively.
In above-mentioned filter 100, described rigid particle flow jet device 130 also only can be provided with filter core end injection unit 132.Specifically, as shown in Figure 4, in a filter assemblies, described filter core end injection unit 132 comprises the conduction pipe 132a1 be positioned at below this filter assemblies, and on described conduction pipe 132a1, dispersed placement has multiple spout 132a2 all upwards sprayed.Above-mentioned these spouts 132a2 mainly sprays rigid particles logistics to the gap between filter core 120 and filter core 120, and emphasis is abolished " ash is built bridge " between filter core 120.Main Function due to the rigid particle flow jet device 130 shown in Fig. 4 is " ash is built bridge " of abolishing between filter core 120, and therefore, the cleaning for filter core 120 surface attachments mainly still relies on above-mentioned back-blowing device to realize.That is, first by above-mentioned filter core end injection unit 132, " ash is built bridge " between filter core 120 can be abolished, and then start back-blowing device, such reverse gas cleaning effect can be better.
As Fig. 1, the raw feedway 300 of rigid particle miscarriage in above-mentioned filtration system specifically can comprise compressed gas source 310 and pressurized canister 320, the inner chamber of described pressurized canister 320 is connected with the Compressed Gas delivery outlet of compressed gas source 310 and the rigid particle delivery outlet of sorting unit 200 respectively by pipeline, pressurized canister 320 is provided with rigid particles logistics delivery outlet, and described rigid particles logistics delivery outlet is connected with the rigid particles logistics input port of rigid particle flow jet device 130 by pipeline.In addition, for the ease of regulating the ratio of rigid particle and carrier gas stream in rigid particles logistics, rigid particles logistics conveyance conduit between pressurized canister 320 and rigid particle flow jet device 130 is also provided with control valve 330, this control valve 330 1 aspect is connected with the rigid particles logistics delivery outlet of pressurized canister 320, be connected with compressed gas source 310 on the one hand, can make to mix in adjustable ratio with the rigid particles logistics from pressurized canister 320 from the gas in compressed gas source 310, the outlet of control valve 330 is connected with the rigid particles logistics input port of rigid particle flow jet device 130 by pipeline again.
As mentioned above, this filter 100 has the rigid particle after being used by rigid particle flow jet device 130 and is collected to the rigid particle mixed in described ash silo 160 and with the dust in ash silo 160 and reclaims and auxiliary unload grey structure.In gas filtration, how better what will solve except emphasis of the present invention removes the attachment on filter core 120 from filter core, thus recover the property passed through of filter core 120, outside the technical problem extending filter core 120 service life, being discharged from filter 100 by the dust filtered out also is the problem often perplexing working site.Because the general particle diameter of the dust filtered out is very little, the very light weight of dust, it is very difficult that gravity unloads ash, therefore will be aided with compressed gas toward contact and purge (abolishing dedusting fouling), regulate the modes such as ash silo cinder-discharging port external and internal pressure, add operation easier.And the rigid particle comparatively dust weight that rigid particle flow jet device 130 of the present invention uses, rigid particle after being used by rigid particle flow jet device 130 to be collected in described ash silo 160 and after mixing with the dust in ash silo 160, to greatly promote mixture mobility under gravity, reduce and unload grey difficulty.
In the filter 100 shown in Fig. 1, the rigid particle after not needing special design that rigid particle flow jet device 130 just can be made to use naturally is collected in described ash silo 160 under gravity.In addition, above-mentioned rigid particle reclaims and auxiliaryly unloads grey structure and also comprise the mechanical mixing device 140 rigid particle entered in ash silo 160 and the dust in ash silo being carried out mixing, thus rigid particle is mixed with the dust in ash silo 160 more even, promote further the convenience of unloading ash manipulation.As Fig. 1, described mechanical mixing device 140 specifically can comprise an external impetus mechanism 141 and one end and to be connected with external impetus mechanism 141 and the other end stretches into the power transmission shaft (in figure non-label) of ash silo 160 inside, this power transmission shaft is provided with stirring vane 142.Above-mentioned external impetus mechanism 141 can drive power transmission shaft and and then drive stirring vane 142 rotate ash silo 160 in, thus promotion rigid particle mix 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 core 120, air-purifying chamber 111 is entered from filter core 120 upper port by the clean gas after filter core 120 filters, then by exhaust outlet 115 discharge filter 100, filter efficiency is caused to decline when filter core 120 outer surface after filtration a period of time attached to one deck filter cake, now, start back-blowing device, blowback working gas sprays into Wen's anti-blowpipe 151 from high speed nozzle 152, further enter filter core 120 from each filter core 120 upper port inner, the filter cake of reverse impact filter core 120 outer surface, after this proceed again to filter.
(2) work after a period of time in a manner described, start between filter core 120 to be formed " ash is built bridge ", filter cake simultaneously on filter core 120 is also more and more difficult to be removed by blowback, at this moment, start rigid particle flow jet device 130, thus rigid particles logistics is sprayed to the attachment on described filter core 120 thus by this rigid particles logistics, impact removing is carried out to described attachment, wherein, the air-flow of described rigid particles logistics is to be the rigid particle of 0.5 ~ 5mm by diameter with pressure be 0.1 ~ 1.0Mpa is formed for carrier, described rigid particle is selected from stainless steel particle, quartz sand particle, silicon-carbide particle, glass particle, zirconia particles, alundum (Al2O3) particle, cast particle, in 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 mechanical mixing device 140 and makes rigid particle and dust Homogeneous phase mixing, after this open ash silo 160 bottom discharge valve and carry out unloading ash; Receive by sorting unit 200 material carried by ash-discharging device bottom ash silo 160 and therefrom isolate for rigid particle flow jet device 130 rigid particle and these rigid particles are flowed to rigid particle and to miscarry raw feedway 300, the rigid particle that sorting unit 200 is carried by rigid particle miscarriage life feedway 300 if desired and carrier gas stream are mixed to form the rigid particles logistics needed for rigid particle flow jet device 130.
Embodiment 1
This embodiment is specifically related to a kind of filtering technique of Coal at Low Temperature gas retort furnace gas.After described furnace gas overflows from gas retort, carry out preliminary solid and gas by gravitational precipitator or cyclone dust collectors and be separated, then directly enter the filtration system shown in Fig. 1 to 3 and carry out dust removal by filtration purification.Under normal operating conditions, filtration system carries out periodicity switching between " filtration-blowback ".Often run 15 minutes by normal operating conditions, then start rigid particle flow jet device 130, with the nitrogen that pressure is about 0.6Mpa be carrier gas stream drive diameter be 0.8 ~ 2.5mm quartz sand particle formed rigid particles logistics inject process is carried out to whole filter assemblies, AEI After End of Injection starts mechanical mixing device 140 and is mixed with the dust in ash silo 160 by the quartz sand particle after use, after this opens ash silo 160 bottom discharge valve and carries out unloading ash.Because the tar content of Coal at Low Temperature gas retort furnace gas is larger, easily separate out on filter core 120 and block filter core duct, the attachment all can not removed completely on filter core 120 is impacted in above-mentioned blowback and rigid particles logistics, therefore, in the Primordial Qi room 113 of filter 100, the gaseous mixture of nitrogen and air is slowly passed into again after taking to unload ash, in this gaseous mixture, the percent by volume of oxygen controls 3 ~ 6%, because in Primordial Qi room 113, self-temperature is very high, the materials such as tar residual on the oxygen in gaseous mixture and filter core react rapidly and burn thus make the material thermal transitions such as tar be gaseous volatile, filter core 120 is made to obtain the clean regeneration of the degree of depth.Impact owing to first having carried out rigid particles logistics and unload ash, filter core hot-spot and the situation generation of vigorous combustion occurs in ash silo 160 when can avoid carrying out reactive combustion by attachment residual on oxygen and filter core, ensure that the security of above-mentioned thermal transition link.
Claims (10)
1. filter core cleaning method, is characterized in that: the method comprises the attachment injection rigid particles logistics on described filter core thus carries out impacting the link removed to described attachment by this rigid particles logistics.
2. the method for claim 1, is characterized in that: it is directly realize in filter interior when not dismantling filter core by means of the rigid particle flow jet device installed in the filter that link is removed in above-mentioned impact.
3. method as claimed in claim 2, is characterized in that: the method is also included in impact to remove after link terminates and the rigid particle after use is collected to the link mixed in the ash silo of filter bottom and with the dust in ash silo.
4. method as claimed in claim 3, is characterized in that: above-mentioned is realize the rigid particle after using by means of the mechanical mixing device installed in the filter with the operation that the dust in ash silo carries out mixing.
5. method as claimed in claim 3, is characterized in that: the method is also included in the link of carrying out unloading ash after rigid particle terminates with the link that dust carries out mixing again.
6. as the method in claim 1 to 5 as described in any one claim, it is characterized in that: the diameter that the rigid particle used in link is removed in above-mentioned impact is 0.5 ~ 5mm.
7. as the method in claim 1 to 5 as described in any one claim, it is characterized in that: it is be that the air-flow of 0.1 ~ 1.0Mpa is for carrier and form described rigid particles logistics with pressure that rigid particle used in link is removed in above-mentioned impact.
8. as the method in claim 1 to 5 as described in any one claim, it is characterized in that: impact that to remove rigid particle used in link be that the air-flow of gas temperature more than 60% to be filtered is for carrier and form described rigid particles logistics with temperature.
9. as the method in claim 1 to 5 as described in any one claim, it is characterized in that: it is for carrier and form described rigid particles logistics with nitrogen or inert gas that rigid particle used in link is removed in above-mentioned impact.
10. as the method in claim 1 to 5 as described in any one claim, it is characterized in that: above-mentioned impact is removed rigid particle used in link and to be selected from stainless steel particle, quartz sand particle, silicon-carbide particle, glass particle, zirconia particles, alundum (Al2O3) particle, cast particle, hard alloy particle any one or a few.
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| CN112933752A (en) * | 2021-01-26 | 2021-06-11 | 大唐淮北发电厂 | Flue gas filtering and purifying device for vacuum filter |
| CN113828076A (en) * | 2021-11-01 | 2021-12-24 | 莱芜钢铁集团泰东实业有限公司 | Blast furnace flue gas sack dust arrester installation convenient to collect |
| CN115502137A (en) * | 2022-10-21 | 2022-12-23 | 航科院（北京）科技发展有限公司 | Automatic cleaning device and automatic cleaning method for air treatment unit |
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| CN105241729A (en) * | 2015-10-28 | 2016-01-13 | 武汉四方光电科技有限公司 | Device and method for gas analysis pretreatment |
| CN106853302A (en) * | 2017-02-21 | 2017-06-16 | 四川省宜宾惠美线业有限责任公司 | A kind of cleaning device |
| CN109078400A (en) * | 2018-09-12 | 2018-12-25 | 葛映东 | A kind of circuit board processing waste gas treatment equipment |
| CN110801047A (en) * | 2019-11-26 | 2020-02-18 | 江西中烟工业有限责任公司 | Cut tobacco dryer moisture drying control device and control method thereof |
| CN112933752A (en) * | 2021-01-26 | 2021-06-11 | 大唐淮北发电厂 | Flue gas filtering and purifying device for vacuum filter |
| CN112933752B (en) * | 2021-01-26 | 2022-04-22 | 大唐淮北发电厂 | Flue gas filtering and purifying device for vacuum filter |
| CN113828076A (en) * | 2021-11-01 | 2021-12-24 | 莱芜钢铁集团泰东实业有限公司 | Blast furnace flue gas sack dust arrester installation convenient to collect |
| CN113828076B (en) * | 2021-11-01 | 2022-09-09 | 莱芜钢铁集团泰东实业有限公司 | Blast furnace flue gas sack dust arrester installation convenient to collect |
| CN115502137A (en) * | 2022-10-21 | 2022-12-23 | 航科院（北京）科技发展有限公司 | Automatic cleaning device and automatic cleaning method for air treatment unit |
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