CN103961947A - High-temperature blowing and deashing technology for deduster - Google Patents
High-temperature blowing and deashing technology for deduster Download PDFInfo
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- CN103961947A CN103961947A CN201410202610.XA CN201410202610A CN103961947A CN 103961947 A CN103961947 A CN 103961947A CN 201410202610 A CN201410202610 A CN 201410202610A CN 103961947 A CN103961947 A CN 103961947A
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Abstract
The invention discloses a high-temperature blowing and deashing technology for a deduster, and relates to equipment comprising a blowing gas conveying pipe, a blowing valve and blowing nozzles. The high-temperature blowing and deashing technology for the deduster is characterized in that the blowing gas conveying pipe is communicated with a high-temperature supercharging gas; the blowing valve is started up periodically for back blowing and deashing in the normal flow filtration process of a filter element of the deduster; in the back blowing and deashing process, the gas blowing temperature is controlled to be above 290 DEG C; the blowing gas forms a high-pressure expansion region in a filter element; deposited ash attached to the outer part of the filter element is removed rapidly; the blowing valve is shut off after the back blowing and deashing process is finished, and the normal flow filtration process of the filter element is recovered. The high-temperature blowing and deashing technology for the deduster, which is provided by the invention, breaks through the traditional low-temperature back blowing and deashing technology, filters high-temperature gases, especially the high-temperature gas of high tar and high-dust gas effectively, moreover, enables the operation temperature of the deduster to be improved by one level, improves the dedusting efficiency and energy utilization ratio, and has favorable popularization and using values.
Description
Technical field
The invention belongs to winding-up cleaner technical field, particularly high temperature jetting deashing technique for a kind of deduster.
Background technology
At present, China's oil, natural gas resource shortage, coal will be the topmost primary energy of China quite over a long time in future.But coal conversion utilizes and has problems and challenge in process, as low in comprehensive utilization ratio, environmental pollution serious, shortage of water resources and CO2 emissions large etc.Therefore, development of coal high-efficiency cleaning comprehensive utilization technique is realized the inevitable choice that energy-saving and emission-reduction are China's energy industry development.And just comprise the industrial policy such as " coal upgrading and comprehensive utilization of resources ", " for brown coal, lower-grade metamorphic bituminous staged conversion, comprehensive utilization " in " clean coal technology development in science and technology " the 12 " ad hoc planning " of national encourage growth.Wherein after the burning of coal substance decomposition, produce a large amount of dusty gases for the treatment of retrofit, in current dry dust removal technique, to adopt dust-removal cloth-bag the most common as smart deduster, but because the normal working temperature that dust-removal cloth-bag can bear treats that the temperature of dedusting coal gas is much lower conventionally, be difficult to transformation, adopt in addition filter core tubular structure to carry out dust removal and filtration to high-temperature dusty gas, realize gas solid separation and gas purification, through filtering, the dusty gas purifying enters air-purifying chamber, dust filter is stayed in the dirt pocket of deduster, be deposited in ash bucket, and the filter core that deduster is used its outer surface in dust removal by filtration process can adsorb a large amount of granule dusts, along with dust constantly increases, will affect filter quality, therefore need the dust that cartridge surface is piled up to remove, there is the design of part producer to adopt dust removal with machine device, as manipulator front end is installed brush, or mechanical oscillation method, but not only complex structure, and because action consistency is poor, easily damage the filter core of deduster, the air-purifying chamber that after filter core damage, dust enters deduster will removing pollutant gas be brought subsequent handling into and is caused great loss.What generally use now is that injection tube realizes reverse deashing, but the result of blowback must be to make the gas of deduster outside again enter the space before deduster particularly purifies, and outside enters, and gas flow rate is large, temperature drop is many, being easy to produce temperature becomes, deduster inner filter core temperature is around too low, easily causes coal tar composition to meet condensation knot and damages filter core; Blowback excess Temperature can make again back-flushing valve and other equipment performances thereof ask higher, and equipment cost increases.The deduster serviceability temperature generally using at present is generally no more than 280 DEG C, be mainly used in bag-type dust, and blowback temperature much adopts normal temperature or low temperature source of the gas, be difficult to be adapted to the dielectric gas strict to temperature requirement that contain of the present invention, therefore, need badly and making further improvement and bring new ideas aspect filter core winding-up dedusting.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, provide a kind of with low cost, can be adapted to work under high-temperature and high-pressure conditions, and deduster variations in temperature is required to strict fast dust-removing, deduster high temperature jetting deashing technique that ash-removal effect is good.
For achieving the above object, the technical solution used in the present invention is: high temperature jetting deashing technique for a kind of deduster, relate to equipment and comprise blowing gas carrier pipe, blowing valve and nozzle, described blowing gas carrier pipe is communicated with high temperature pressurised gas, in the filter core forward filter process of deduster, periodically starting described blowing valve carries out reverse gas cleaning, in reverse gas cleaning process, blowing gas temperature is controlled at more than 290 DEG C, high temperature pressurised gas is in the inner high pressure breathing space that forms of filter core, remove fast the dust stratification that filter core outside is adhered to, after finishing, reverse gas cleaning process closes described blowing valve, recover filter core forward filter process.
Further, described reverse gas cleaning process start-up period is 2～30min.
Further, described reverse gas cleaning process start-up period is 4～15min.
Further, described blowing gas temperature is controlled at 330～950 DEG C.
Further, described blowing gas temperature is controlled at 400～750 DEG C.
Further, described blowing gas temperature is controlled at 450～600 DEG C.
Further, described blowing gas temperature is controlled at 500～560 DEG C.
Wherein, described high temperature pressurised gas source of the gas connects dust catcher gas purifying chamber escape pipe and/or boiler gas outlet pipe.
Described blowing gas carrier pipe outlet side connects described nozzle by blowing valve, and described nozzle inserts described filter core or covers described filter core top by Venturi tube.
Described blowing valve is selected the pulse blowing valve of high temperature high voltage resistant, and the sealing position of described pulse blowing valve comprises the flap and the seal valve seat that are used in conjunction with, and described flap and seal valve seat adopt metal material to make.
On the flap of described blowing valve, ways is set, described ways comprises the guide post being located on described seal valve seat.
Described blowing gas carrier pipe is entering deduster position set temperature checkout gear, and described temperature-detecting device connects described heater, and described heater is electric heater or burner.
Deduster of the present invention comprises blowing gas carrier pipe, blowing valve and nozzle with the device of high temperature jetting deashing process using, described blowing gas carrier pipe is communicated with high temperature pressurised gas, realize the breakthrough of low temperature back blowing process, be adapted to the working environment of high temperature, high pressure, ensure that the gas temperature in deduster is comparatively stable, avoid gas temperature in winding-up process to reduce and cause the condensation of coal tar wet goods composition in dusty gas and damage equipment, operation flow process of the present invention is, in the time of the normal dust removal and filtration of deduster, be in filter core forward filter process, periodically start reverse gas cleaning process, reverse gas cleaning processing is carried out in timing, reverse gas cleaning process is the environment that is adapted to high-temperature dust removal, described blowing gas temperature is controlled at more than 290 DEG C, according to the handling object optimization of filter medium is 400～750 DEG C, can ensure that in blowback process, deduster Nei Wenduwen becomes in scope of design, avoiding temperature to become excessive causes tar ingredients condensation to change, affect filter element life, the high temperature pressurised gas that blowback is come in is in the inner high pressure breathing space that forms of filter core, lasting expansion causes filter core internal pressure to be greater than external pressure, can remove fast the dust stratification that filter core outside is adhered to, the dust stratification that blowback is removed falls into ash bucket, accumulation is to a certain degree drained, shift, remove and realized after the functional regeneration of filter core when dust stratification outside filter core, reverse gas cleaning process finishes, recover filter core forward filter process, enter a circulation, ensure the permanent effectively dust removal and filtration of filter core.High temperature pressurised gas source of the gas of the present invention connects dust catcher gas purifying chamber escape pipe and/or external feeder, can select mixing or the single one of two groups of gases, ensures temperature and Pressure Exponent, described blowing gas carrier pipe outlet side connects described nozzle by blowing valve, described nozzle inserts described filter core or covers described filter core top by Venturi tube, when adopting Venturi tube to cover described filter core top, Venturi tube bottom is fixedly connected with the card that filter core is installed, described Venturi tube top connects respectively blowing gas carrier pipe and Purge gas output channel, the device of simultaneously collecting as blowback and filter gas, the gas that venturi tube structure feature enters while making blowback is by secondary pressurized, prevent gas backstreaming and whirlpool, contribute to improve blowback efficiency, and described Venturi tube can cover more filter core, control convenient, globality is strong, described blowing valve of the present invention is selected the pulse blowing valve of high temperature high voltage resistant, can be adapted to the operating mode of the related HTHP of this technique, the difference of the pulse blowing valve of described high temperature high voltage resistant and traditional blowing valve is that its sealing position comprises the flap and the seal valve seat that are used in conjunction with, described flap and seal valve seat adopt metal material to make, change the present situation that traditional blowing valve diaphragm adopts quality of rubber materials sealing product, hermetic unit of the present invention comprises the flap and the seal valve seat that adopt metal material to make, particularly adopt wear resistant alloy material to make in its contact site, in process of manufacture, process guarantee fineness in the grinding (sclerosis) of carrying out under matching requirements, well realize the good technique effect of durable sealing, can be good at being adapted to the occasion that dielectric gas is high temperature, not only ensure under the condition of elevated-temperature seal and good winding-up effect, several times are improved its service life, further on the flap of described blowing valve, ways is set, concrete, described ways comprises the guide post being located on described seal valve seat, can well adapt to high temperature and high pressure gas effect, avoids producing larger vibrations and poorly sealed situation.Described blowing gas carrier pipe is entering deduster position set temperature checkout gear, the detection signal of described temperature-detecting device is as the control reference signal of described heater, ensure that with this temperature in described blowing gas carrier pipe is in stable state, described heater can be selected the mode such as electric heater or burner, heating effect is good, and Based Intelligent Control is convenient.
The present invention is novel in design practical, break through the process technology limit of traditional low temperature reverse gas cleaning, realize high-temperature gas, particularly high tar, effective filtration of the high-temperature gas of high dusty gas, and make deduster operating temperature promote a class, can more approach the initial temperature of dusty gas, optimize dust collecting process, reduce the low drawback of final products energy value that traditional mode of operation that significantly cooling refilters is brought, also improved efficiency of dust collection, aspect the filter core dedusting of high-temperature gas, starting new approach, and making subsequent treatment make oils ratio in product increases, this is because the composition gasification degree such as temperature increase tar are high, in gas, capacity is large.The present invention is reasonable in design, with low cost, and device security is reliable, the cycle of operation is long, the regenerability of filter core is high, and filter efficiency has improved more than 5%, and capacity utilization ratio is high, node optimization, operating cost reduces more than 10%, makes product benefit good, has good value for applications.
figure of description
Below in conjunction with accompanying drawing, the present invention is further detailed:
Fig. 1 is the structural representation of embodiments of the invention one;
Fig. 2 is a kind of structural representation of blowing valve of the present invention;
Fig. 3 is the structural representation of embodiments of the invention three.
Specific embodiment
Embodiment mono-
As Fig. 1, shown in Fig. 2, high temperature jetting deashing technique for a kind of deduster, relate to equipment and comprise blowing gas carrier pipe 1, blowing valve 2 and nozzle 3, described blowing gas carrier pipe 1 is communicated with high temperature pressurised gas, filter core 5 at deduster 4 carries out in forward filter process, periodically starting described blowing valve 2 carries out reverse gas cleaning, in reverse gas cleaning process, blowing gas temperature is controlled at more than 290 DEG C, high temperature pressurised gas is in the inner high pressure breathing space that forms of filter core 5, remove fast the dust stratification that filter core 5 outsides are adhered to, after finishing, reverse gas cleaning process closes described blowing valve 2, recover filter core 5 forward filter processes.
Wherein, described high temperature pressurised gas source of the gas connects external feeder, and described feeder is inert gas, as nitrogen, on described blowing gas carrier pipe 1, supercharging device 10 is set; Described blowing gas carrier pipe 1 outlet side connects described nozzle 3 by blowing valve 2, and described nozzle 3 inserts described filter core 5; Described blowing valve 2 is selected the pulse blowing valve of high temperature high voltage resistant, and the sealing position of described pulse blowing valve comprises the flap 21 and the seal valve seat 22 that are used in conjunction with, and described flap 21 and seal valve seat 22 adopt metal material to make; On the flap 21 of described blowing valve 2, ways 23 is set, described ways 23 comprises the guide post being located on described seal valve seat 22; Described blowing gas carrier pipe 1 is entering deduster 4 position set temperature checkout gears 6, and described temperature-detecting device 6 connects described heater 9, and described heater 9 is electric heater or burner.
As a comparison case, filter core 5 does not carry out reverse gas cleaning processing; Contrast filtration service time of filter core of the present invention and filter efficiency as a comparison with this.
Embodiment bis-
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-: wherein relate in equipment, described high temperature pressurised gas source of the gas connects the air-purifying chamber escape pipe of deduster 4.
Embodiment tri-
High temperature jetting deashing technique for a kind of deduster, be with the difference of embodiment mono-: as shown in Figure 3, wherein relate in equipment, described blowing gas carrier pipe 1 outlet side connects Venturi tube 8 by blowing valve 2, described Venturi tube 8 covers described filter core 5 tops, described Venturi tube 8 tops are provided with branch air path, connect respectively blowing gas carrier pipe 1 and Purge gas outlet side 7.
Embodiment tetra-
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 330 DEG C, described reverse gas cleaning process start-up period is 10min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 5%, and filter core extends 3 times 5 service times.
Embodiment five
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 350 DEG C, described reverse gas cleaning process start-up period is 9min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 5.3%, and filter core extends 4 times 5 service times.
Embodiment six
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 400 DEG C, described reverse gas cleaning process start-up period is 8min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 6.8%, and filter core extends 6 times 5 service times.
Embodiment seven
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 480 DEG C, described reverse gas cleaning process start-up period is 8min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve %7.3, and filter core extends 7 times 5 service times.
Embodiment eight
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 500 DEG C, described reverse gas cleaning process start-up period is 7min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 9.2%, and filter core extends 10 times 5 service times.
Embodiment nine
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 530 DEG C, described reverse gas cleaning process start-up period is 7min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 8.6%, and filter core extends 9 times 5 service times.
Embodiment ten
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 560 DEG C, described reverse gas cleaning process start-up period is 6min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve %8.4, and filter core extends 8.5 times 5 service times.
Embodiment 11
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 600 DEG C, described reverse gas cleaning process start-up period is 5min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 7.8%, and filter core extends 6.5 times 5 service times.
Embodiment 12
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 650 DEG C, described reverse gas cleaning process start-up period is 5min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 6%, and filter core extends 5 times 5 service times.
Embodiment 13
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 750 DEG C, described reverse gas cleaning process start-up period is 4min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 5.5%, and filter core extends 4.8 times 5 service times.
Embodiment 14
High temperature jetting deashing technique for a kind of deduster, is with the difference of embodiment mono-or two or three: described blowing gas temperature is controlled at 460 DEG C, described reverse gas cleaning process start-up period is 5min.
Examined is compared with comparative example, and described filter core 5 filter efficiencies improve 8%, and filter core extends 7 times 5 service times.
The present invention is novel in design practical, break through the process technology limit of traditional low temperature reverse gas cleaning, realize high-temperature gas, particularly high tar, effective filtration of the high-temperature gas of high dusty gas, and make deduster operating temperature promote a class, can more approach the initial temperature of dusty gas, optimize dust collecting process, reduce the low drawback of final products energy value that traditional mode of operation that significantly cooling refilters is brought, also improved efficiency of dust collection, aspect the filter core dedusting of high-temperature gas, starting new approach, and making subsequent treatment make oils ratio in product increases, this is because the composition gasification degree such as temperature increase tar are high, in gas, capacity is large.The present invention is reasonable in design, with low cost, and device security is reliable, the cycle of operation is long, the regenerability of filter core is high, and filter efficiency has improved more than 5%, and capacity utilization ratio is high, node optimization, operating cost reduces more than 10%, makes product benefit good, has good value for applications.
Claims (10)
1. a high temperature jetting deashing technique for deduster, relate to equipment and comprise blowing gas carrier pipe, blowing valve and nozzle, it is characterized in that: described blowing gas carrier pipe is communicated with high temperature pressurised gas, in the filter core forward filter process of deduster, periodically starting described blowing valve carries out reverse gas cleaning, in reverse gas cleaning process, blowing gas temperature is controlled at more than 290 DEG C, high temperature pressurised gas is in the inner high pressure breathing space that forms of filter core, remove fast the dust stratification that filter core outside is adhered to, after finishing, reverse gas cleaning process closes described blowing valve, recover filter core forward filter process.
2. high temperature jetting deashing technique for deduster as claimed in claim 1, is characterized in that: described reverse gas cleaning process start-up period is 2～30min.
3. high temperature jetting deashing technique for deduster as claimed in claim 1, is characterized in that: described reverse gas cleaning process start-up period is 4～15min.
4. high temperature jetting deashing technique for deduster as claimed in claim 1, is characterized in that: described blowing gas temperature is controlled at 330～950 DEG C.
5. high temperature jetting deashing technique for deduster as claimed in claim 1, is characterized in that: described blowing gas temperature is controlled at 400～750 DEG C.
6. high temperature jetting deashing technique for deduster as claimed in claim 1, is characterized in that: described blowing gas temperature is controlled at 450～600 DEG C.
7. high temperature jetting deashing technique for deduster as claimed in claim 1, is characterized in that: described blowing gas temperature is controlled at 500～560 DEG C.
8. high temperature jetting deashing technique for deduster as described in as arbitrary in claim 1-7, it is characterized in that: described high temperature pressurised gas source of the gas connects dust catcher gas purifying chamber escape pipe and/or external feeder, described blowing gas carrier pipe outlet side connects described nozzle by blowing valve, and described nozzle inserts described filter core or covers described filter core top by Venturi tube.
9. high temperature jetting deashing technique for deduster as described in as arbitrary in claim 1-7, it is characterized in that: described blowing valve is selected the pulse blowing valve of high temperature high voltage resistant, the sealing position of the pulse blowing valve of described high temperature high voltage resistant comprises the flap and the seal valve seat that are used in conjunction with, and described flap and seal valve seat adopt metal material to make; On the spool of described blowing valve, ways is set, described ways comprises the guide post being located on described seal valve seat.
10. high temperature jetting deashing technique for deduster as described in as arbitrary in claim 1-7, it is characterized in that: described blowing gas carrier pipe is entering deduster position set temperature checkout gear, described temperature-detecting device connects described heater, and described heater is electric heater or burner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410202610.XA CN103961947A (en) | 2014-05-14 | 2014-05-14 | High-temperature blowing and deashing technology for deduster |
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| CN201410202610.XA CN103961947A (en) | 2014-05-14 | 2014-05-14 | High-temperature blowing and deashing technology for deduster |
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| CN103961947A true CN103961947A (en) | 2014-08-06 |
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| CN201410202610.XA Pending CN103961947A (en) | 2014-05-14 | 2014-05-14 | High-temperature blowing and deashing technology for deduster |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104771964A (en) * | 2015-04-01 | 2015-07-15 | 成都易态科技有限公司 | High-temperature reverse blowing process and device thereof |
| CN104826411A (en) * | 2015-04-17 | 2015-08-12 | 成都易态科技有限公司 | Back-flushing de-dusting method and equipment for flue gas catalytic filtration device |
| CN111991941A (en) * | 2020-09-27 | 2020-11-27 | 淄博真空设备厂有限公司 | Dust remover |
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| CN111991941A (en) * | 2020-09-27 | 2020-11-27 | 淄博真空设备厂有限公司 | Dust remover |
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Application publication date: 20140806 |