CN202538586U - High-temperature biomass filter - Google Patents

High-temperature biomass filter Download PDF

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Publication number
CN202538586U
CN202538586U CN2012201304091U CN201220130409U CN202538586U CN 202538586 U CN202538586 U CN 202538586U CN 2012201304091 U CN2012201304091 U CN 2012201304091U CN 201220130409 U CN201220130409 U CN 201220130409U CN 202538586 U CN202538586 U CN 202538586U
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CN
China
Prior art keywords
filter
chamber
temperature
cyclone chamber
filter according
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Withdrawn - After Issue
Application number
CN2012201304091U
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Chinese (zh)
Inventor
常厚春
马革
陈平
张强
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Guangzhou Devotion Thermal Technology Co Ltd
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Guangzhou Devotion Thermal Technology Co Ltd
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Priority to CN2012201304091U priority Critical patent/CN202538586U/en
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Publication of CN202538586U publication Critical patent/CN202538586U/en
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Abstract

The utility model discloses a high-temperature biomass filter. A box body of the high-temperature biomass filter is divided into a cyclone chamber and a filtering chamber, wherein the upper part of the cyclone chamber is communicated with the filtering chamber, the inner cavity of the cyclone chamber is cylindrical, a gas inlet is arranged on the cyclone chamber and is tangent to the inner cavity wall of the cyclone chamber, a filter groove is arranged on the inner side wall of the filtering chamber, a filtering net is laid in the filter groove, a layer of filter medium is laid on the filtering net to filter biomass gas containing impurities, the lower part of the filter groove is provided with a wind chamber which contains clean biomass gas, the wind chamber is communicated with a gas outlet, and the gas outlet is connected with a reverse-blowing pipe. The high-temperature biomass filter can automatically remove blockage at a high temperature more conveniently and faster, and has good labor-saving effect.

Description

The biomass high-temperature filter
Technical field
The utility model belongs to filter plant, specifically relates to a kind of filter that is applicable to filtering biological matter combustion gas under the high temperature.
Background technology
The high temperature filtration technology is the visual plant of field industrial furnace energy-saving and emission-reduction such as metallurgy, the energy, chemical industry, material, burning.International in the high-temperature dust removal Study on Technology, mainly contain forms such as cyclone dust removal, high temperature electric precipitation, the filtration of ceramic chimney filter, the filtration of metal chimney filter and Bed Filtration.
In low temperature cyclone dust collectors (<400 ℃) be widely used, be characterized in simple in structure, processing ease, cheap, but efficiency of dust collection is not high, even cyclone dust collectors the most efficiently, for 50 μ m dust, efficiency of dust collection can only reach about 96%; To 5 μ m dust, have only about 73%; And to 1 μ m, be merely about 27%.For high temperature cyclone dust removal, it is big that dusty gas viscosity becomes, and the hot properties of particle also changes, and the cyclone dust removal effect is poorer.Therefore, even three cyclone dust collectors series connection, dust removing effects can not satisfy the environment protection emission requirement, and cyclone dust collectors can only be as preparatory dedusting.
States such as U.S.A, moral, Japan are used for high-temperature dust removal to electric cleaner and explore.At present, existing reaching at 650~790 ℃, 570kpa moved 100 hours experimental record down, and efficiency of dust collection can reach 95~99.5%.But have that corona discharge is unstable, electrode life short, to problems such as smoke components sensitivity, high-temperature insulations, in the short time, be difficult to breakthrough.
The outstanding advantage of pottery chimney filter is that filter efficiency is high, and outstanding problem is that availability and reliability are low, exists such as seal failure between tube-to-tube sheet connection; Thermal shock, mechanical shock cause the screen pipe brittle failure; Grey bridge expands with heat and contract with cold to squeeze and splits screen pipe between pipe; Thermal creep; With composition reaction-sintered or localized hyperthermia's sintering such as alkali metal; Problems such as permanent ash deposition crust.
The metal chimney filter is bigger than ceramic chimney filter intensity, thermal conductance good, and filtering layer is thin, and resistance reduces, and outstanding problem is that non-oxidizability, corrosion resistance, temperature tolerance are low, and heatproof is lower than 450 ℃ under the oxidizing atmosphere, is lower than 600 ℃ under the reducing atmosphere.
Bed Filtration is high temperature resistant, corrosion-resistant, economical and practical reliable, outstanding problem is to less than 10 μ m grits, and is particularly low to the submicron particle filter efficiency.
Through discovering, Bed Filtration is high temperature resistant, corrosion-resistant, economical and practical reliable, if can make Bed Filtration that micron and submicron particle filter efficiency are brought up to ceramic chimney filter level, it is technological so undoubtedly will to become the most competitive high-temperature dust removal.
Analyzing domestic and international research document can know, improve Bed Filtration efficient, must reduce the stratum granulosum particle diameter of filter medium, but it also is limited reducing the stratum granulosum particle diameter of filter medium.Particle diameter is too little, and the stratum granulosum pressure drop increases too fast, for moving granular bed; Just have to improve the stratum granulosum translational speed, cause between particle the changing of the relative positions big and produce reentrainment of dust, filter efficiency is reduced; And for fixed bed, high pressure drop lower surface muffin is prone to perforation, and filter efficiency is descended fast; Reduce the stratum granulosum particle diameter of filter medium so only depend on, it is limited improving filter efficiency, is difficult to fundamentally solve the inefficient problem of Bed Filtration.
In order fundamentally to solve the inefficient problem of Bed Filtration; University Of Ningbo poplar state China utility model multilayer filtering material particle bed steps level filter new technology; Basic principle is: multilayer filtering material particle bed is made up of two-layer filtrate up and down, also can be made up of in last time three-layer filter.The upper strata filtering material particle is big, the space is big, and dust containing capacity is big, pressure drop is low, is the deep-bed filtration characteristic, can rise and improve bed dust containing capacity, prolongation cleaning cycle, the effect of protection fine grained layer; The intermediate layer filtering material particle is thinner, is shallow-layer filtering feature (dust infiltrate filtering layer shallow and lack), plays further to protect the fine grained layer; Lower floor's filtering material particle is the thinnest, and the filter material layer surface can form muffin, with dirt filter dirt; Be the surface filtration characteristic, high efficiency is intercepted and captured micron and submicron particle, particularly because the protection of upper strata filtrate, middle level filtrate has been arranged; Can make the dust concentration that arrives this fine grained layer be reduced to 1/75~1/200 of upper strata filter material layer inlet dust concentration; Reduce the growth rate of fine grained layer muffin pressure drop widely, significantly improve the filter efficiency of fine dust, prolong cleaning cycle.
The core that multilayer filtering material particle bed steps level is filtered new technology is: step filters, that is: coarse media filters meal dirt, and the fine filtering material filters fine dust, thereby reaches high efficiency and low pressure drop, and this is that any individual layer filtering material particle bed all can not reach.
The ingenious part that multilayer filtering material particle bed steps level is filtered new technology is: the particle diameter of each metafiltration material successively reduces from top to bottom successively; The grain density of each metafiltration material then successively increases from top to bottom successively; Make the step filtration successively of each metafiltration material; And can be under same gas speed common fluidisation, deashing and not mixing mutually mutually fast, the step strainability is constant forever.Make a brief account in the face of existing several kinds of typical granular bed filter dedusting technologies down.
Rake formula deashing stratum granulosum dirt catcher.This is that a kind of stratum granulosum is positioned over the online fixed bed filtering device of horizontal screen, and it adopts the revolution rake to stir filtering layer and combine the return air deashing.Once sold by German Munich cleaner manufactured the seventies.Once there were tens cement plants that this filter has been installed.But rake is just bad in about 1 year.This device shortcoming is that jam, wearing and tearing appear in the transmission mechanism of comb rake easily, and screen cloth is easily by particles clog etc.
Dust remover with boiling-particle layer.This also is that a kind of stratum granulosum is positioned over the online fixed bed filtering device of horizontal screen; Filter process is similar with single rake formula, and during deashing, the blowback air blasts through airflow-distribution board below stratum granulosum with certain flow rate and pressure; Make stratum granulosum be fluidization (being fluidized state); Make the dust that amasss in stratum granulosum because of collision between particle, friction come off,, reach the purpose of stratum granulosum deashing by the blowback carried away by air movement.Ducon company proposed the gravel bed filter of this fluidization reverse gas cleaning mode in 1970, and had designed several kinds of forms, but not commerical test and application.
Cross-flow type moving bed stratum granulosum dirt catcher.Cross-flow type moving bed stratum granulosum dirt catcher is a kind of pattern that moving bed stratum granulosum dirt catcher occurs the earliest; Basic principle is, filtrate keeps certain thickness vertical filtering layer under the clamping of screen cloth or venetian blind type plate, and moves from top to bottom because of the gravity effect; The dusty gas level is passed through stratum granulosum; Form cross-current, dust is held back by filtering layer, and gas is purified.Report that India is developing a kind of moving bed filter in the paper that nineteen ninety-five delivers, be used for the dust removal by filtration of PFBC high-temperature flue gas.The filtrate that is characterized in circulating adopts pneumatic conveying mode, and filtrate is separated by top one inertia separator with dust, and strength carries the ash-laden gas of usefulness to be purified by cyclone dust collectors and sack cleaner two-stage series connection.
There is not sieve adverse current mobile layer filter.Not having sieve adverse current mobile layer filter is that the filter diameter has reached 4m, has reached the scale of commercial Application by the American Studies exploitation.The nineties, hot working research institute of China national Utilities Electric Co. did not research and develop nothing sieve adverse current mobile layer filter pilot system yet under country's 95 key scientific and technological projects and the subsidy of state key base research and development planned project.
The utility model content
In order to solve the problem that prior art exists, the utility model provides a kind of deduster that can at high temperature reach good dust removing effects.
In order to realize above purpose; The technical scheme of the utility model is following: a kind of biomass high-temperature filter, comprise resistant to elevated temperatures casing, and casing has fuel gas inlet, gas outlet and impurity discharging opening; Said casing is divided into cyclone chamber and filter chamber, and the top of cyclone chamber is communicated with the filter chamber; The inner chamber of cyclone chamber is cylindrical, and said fuel gas inlet is arranged on cyclone chamber and tangent with the cyclone chamber internal chamber wall; Said filter chamber's madial wall mounting filtering groove; And in said lautertuns, lay filter screen; Also be covered with one deck filter medium above the filter screen to filter impure biological fuel gas; The bottom of said lautertuns has the air compartment that holds clean biological fuel gas, and this air compartment is communicated with gas outlet, and said gas outlet connects anti-blowpipe.
Further, said lautertuns is made up of the Turbogrid plates with grid, side plate and swash plate, the Turbogrid plates that side plate connection level is laid and the swash plate of inclination, and Turbogrid plates, side plate and swash plate enclose with box inside and surround air compartment.
Said side plate is vertical each other with Turbogrid plates, and swash plate and horizontal angle are 10~20 °.
Said side plate also is connected with guide plate.
Said side plate, swash plate and guide plate insulation material parcel are wherein.
Said anti-blowpipe is equipped with switch valve.
Offer the blowback inlet between the gas outlet of said anti-blowpipe and the switch valve.
Said casing top offers the mouth that gives out of gas, and at mouthful explosion-proof water seal arrangement of installation that gives out of gas.
Said box inside is provided with the preheating burner near the fuel gas inlet place.
Compared with prior art, the utility model is owing to be provided with lautertuns in the filter chamber, and the air compartment of lautertuns is communicated with gas outlet, gas outlet connection anti-blowpipe, and also fuel gas inlet and cyclone chamber are tangent.Thereby after impure biological fuel gas personally gets in the cyclone chamber; Big and heavy impurity falls to the impurity outlet; And light thin impurity still follows combustion gas through lautertuns; Light thin impurity is deposited on and filters the filter medium top layer under the obstruct of filter medium, gets into air compartment through the clean combustion gas of filtering, and is discharged by anti-blowpipe; When impurity excessively is deposited on the filter medium top layer, pressure drop is increased, even stop up the filter screen of lautertuns; Cause filtering function to lose efficacy, at this moment, through to the reverse non-combustible gas that is blown into of anti-blowpipe; The impurity of deposition is hiked up and drop to the impurity outlet, reach the purpose that impurity is stopped up in automatic removing.When removing obstruction impurity, temperature is reduced to the mode of ability operation under the normal temperature environment in the casings such as need compared with manual work, and the utility model can realize removing automatically obstruction operation, more convenient and quicker, less manpower under the condition of high temperature.
Description of drawings
Fig. 1 is the structure of filter sketch map.
Fig. 2 is the structural representation of lautertuns.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is that the A-A of Fig. 1 is to cutaway view.
The specific embodiment
As shown in Figure 1, high-temperature filter is made up of casing 1, lautertuns 2, filter screen 3, explosion-proof water seal 5 and anti-blowpipe 6.Casing 1 is made up of with filter chamber 25 cyclone chamber 24, and the inner chamber of cyclone chamber 24 is cylindrical, and the inner chamber of filter chamber 25 is a tetragonal body, and the top of cyclone chamber 24 is communicated with filter chamber 25.The sidewall of cyclone chamber 24 offers fuel gas inlet 7, the sidewall of fuel gas inlet 7 and cyclone chamber 24 madial walls tangent (like Fig. 4), and the position of fuel gas inlet 7 is positioned at 25 belows, filter chamber.The sidewall of filter chamber 25 offers gas outlet 8; Cyclone chamber 24 bottoms take over and offer impurity discharging opening 9; Filter chamber's 25 installed inside have lautertuns 2, and gas outlet 8 connects anti-blowpipe 6, and anti-blowpipe is equipped with stop valve 10; Offer blowback inlet 20 between stop valve 10 and the gas outlet 8, impurity discharging opening 9 connects discharge bucket 21.
As shown in Figure 2, lautertuns is by Turbogrid plates 11, skeleton and build material 14 and form.Turbogrid plates 11 are horizontally disposed with, and are used to lay the filtration part with pore, and it sparsely offers grid 16, and the area of grid 16 is at least 9.0cm 2Skeleton is connected to form by side plate 13, swash plate 12 and guide plate 15.Side plate 13 vertically is provided with, and its same side is connected with Turbogrid plates 11 and swash plate 12, swash plate 12 be positioned at Turbogrid plates 11 below, swash plate 12 is positioned at the lower end of side plate 13.Swash plate 12 becomes 15 ° of angles with the horizontal line face.The end face of the medial surface of the bottom surface of Turbogrid plates 11, side plate 13 and swash plate 12 surrounds a semi-enclosed air compartment 22 jointly, and air compartment 22 is communicated with gas outlet 8.The upper end of side plate 13 connects the guide plate 15 of inclination, and guide plate is outward-dipping.For the intensity that strengthens skeleton and high temperature resistant, skeleton need wrap up one deck insulation and build material 14.As shown in Figure 3, the overall width of lautertuns is 1 meter to 3 meters, and it is inboard that side 17 all is closely attached on 25 front and back, filter chamber, and side 18 is closely attached on the inboard filter element that forms in 25 left sides, filter chamber.Lay one deck filter screens 3 above the Turbogrid plates 11, on the filter screen about pore diameter 1mm, and spread quartz sand 4 as filter medium at filter screen.
In order to prevent to occur HTHP in the casing, also offer at the casing top and diffuse mouthfuls 19, and explosion-proof water seal arrangement 5 is installed diffusing mouthfuls 19.Before preventing that biological fuel gas from getting into casing, because casing is in normal temperature the tar that contains in the biological fuel gas is formed rapid condensation, at cyclone chamber burner 23 is set, be used for the preheating of casing.

Claims (9)

1. a biomass high-temperature filter comprises resistant to elevated temperatures casing, and casing has fuel gas inlet, gas outlet and impurity discharging opening,
It is characterized in that: said casing is divided into cyclone chamber and filter chamber, and the top of cyclone chamber is communicated with the filter chamber; The inner chamber of cyclone chamber is cylindrical, and said fuel gas inlet is arranged on cyclone chamber and tangent with the cyclone chamber internal chamber wall;
Said filter chamber's madial wall mounting filtering groove; And in said lautertuns, lay filter screen; Also be covered with one deck filter medium above the filter screen to filter impure biological fuel gas; The bottom of said lautertuns has the air compartment that holds clean biological fuel gas, and this air compartment is communicated with gas outlet, and said gas outlet connects anti-blowpipe.
2. high-temperature filter according to claim 1; It is characterized in that; Said lautertuns is made up of the Turbogrid plates with grid, side plate and swash plate, the Turbogrid plates that side plate connection level is laid and the swash plate of inclination, and Turbogrid plates, side plate and swash plate enclose with box inside and surround air compartment.
3. high-temperature filter according to claim 2 is characterized in that, said side plate is vertical each other with Turbogrid plates, and swash plate and horizontal angle are 10~20 °.
4. biomass high-temperature filter according to claim 3 is characterized in that said side plate also is connected with guide plate.
5. high-temperature filter according to claim 2 is characterized in that, said side plate, swash plate and guide plate insulation material parcel are wherein.
6. high-temperature filter according to claim 1 is characterized in that said anti-blowpipe is equipped with switch valve.
7. high-temperature filter according to claim 6 is characterized in that, offers the blowback inlet between the gas outlet of said anti-blowpipe and the switch valve.
8. high-temperature filter according to claim 1 is characterized in that, said casing top offers the mouth that gives out of gas, and at mouthful explosion-proof water seal arrangement of installation that gives out of gas.
9. high-temperature filter according to claim 1 is characterized in that said box inside is provided with the preheating burner near the fuel gas inlet place.
CN2012201304091U 2012-03-30 2012-03-30 High-temperature biomass filter Withdrawn - After Issue CN202538586U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012201304091U CN202538586U (en) 2012-03-30 2012-03-30 High-temperature biomass filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012201304091U CN202538586U (en) 2012-03-30 2012-03-30 High-temperature biomass filter

Publications (1)

Publication Number Publication Date
CN202538586U true CN202538586U (en) 2012-11-21

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Application Number Title Priority Date Filing Date
CN2012201304091U Withdrawn - After Issue CN202538586U (en) 2012-03-30 2012-03-30 High-temperature biomass filter

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102626576A (en) * 2012-03-30 2012-08-08 广州迪森热能技术股份有限公司 High-temperature filter for biomass
CN104315501A (en) * 2014-05-12 2015-01-28 沈阳工程学院 Fly ash separation and returning device for layer-burning biomass boiler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102626576A (en) * 2012-03-30 2012-08-08 广州迪森热能技术股份有限公司 High-temperature filter for biomass
CN102626576B (en) * 2012-03-30 2014-05-28 广州迪森热能技术股份有限公司 High-temperature filter for biomass
CN104315501A (en) * 2014-05-12 2015-01-28 沈阳工程学院 Fly ash separation and returning device for layer-burning biomass boiler

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20121121

Effective date of abandoning: 20140528

RGAV Abandon patent right to avoid regrant