CN103205286A - Crude gas dust remover and dust removing method - Google Patents
Crude gas dust remover and dust removing method Download PDFInfo
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- CN103205286A CN103205286A CN2013101163251A CN201310116325A CN103205286A CN 103205286 A CN103205286 A CN 103205286A CN 2013101163251 A CN2013101163251 A CN 2013101163251A CN 201310116325 A CN201310116325 A CN 201310116325A CN 103205286 A CN103205286 A CN 103205286A
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Abstract
The invention relates to a crude gas dust remover and a dust removing method. According to the invention, the combination of cyclone dust removal and granular bed filter is implemented by using hydro-cyclone groups, the filter material is fluidized, blown, precipitated and separated by further using hot smokes of a raising pipe, and then the filter material is returned to a filter for cyclic utilization after being buffered in a buffer chamber. According to the invention, coal ash in crude gas is effectively removed with high removal efficiency; the operation method is simple; the filter material can be recycled; the treatment cost is saved; and meanwhile, the device provided by the invention is stable in running, simple in equipment and strong in operability.
Description
Technical field
The invention belongs to technical field of coal chemical industry, be specifically related to cleaning apparatus and method that pulverized coal pyrolysis is produced the raw gas that produces in the coal tar process.
Background technology
In recent years, the coal low temperature pyrogenation being produced coal tar has both at home and abroad had widely research, but in the raw gas that the process of producing produces owing to contain a large amount of tar gass, dedusting does not have breakthrough progress, is seriously restricting the development of this industry.
Be to adopt knockdown cyclonic separator for a kind of method of raw gas dedusting at present, separation efficiency is low, can't separate the following coal dust of 5um, and producing a large amount of greasy filth can't separate; Another kind method is electric precipitation, because coal tar gasification temperature height is being lower than condensation point meeting condensation, electric precipitation needs operation at high temperature, the high temperature corrosion of wire electrode can't solve, and electric precipitation is because bulky, and tar overstand, second pyrolysis seriously make the yield of tar descend; Pottery, powder metal pipe automatic back blow filter besides, and raw gas constantly raises pressure reduction at the tube-surface carbon distribution under the high temperature, and blowback can't make filter cake come off, and cause the device can not long-term operation.
Summary of the invention
One of purpose of the present invention is to overcome the existing deficiency of raw gas cleaning apparatus, a kind of utilize eddy flow group and granular bed filter combination are provided, at high temperature remove the coal ash in the raw gas effectively, stable, the raw gas cleaning apparatus that efficiency of dust collection is high.
Two of purpose of the present invention is to provide the raw gas that a kind of working method is simple, efficiency of dust collection is high method for dust removal.
The technical scheme that adopts that solves the problems of the technologies described above is:
The raw gas cleaning apparatus is to be connected with strainer in the air outlet of eddy flow group tornado dust collector by pipeline, the outlet of the filtrate of strainer is by the hot smoke inlet end UNICOM of pipeline and riser tube, the exhanst gas outlet of riser tube extends in the settling pocket of sedimentation sootblower, the discharge port of sedimentation sootblower is by the feeding mouth UNICOM of pipeline and surge bunker, and the outlet of surge bunker is by the filtrate entrance UNICOM of pipeline and strainer.
Above-mentioned eddy flow group tornado dust collector are: the top at collection chamber is provided with intake ducting, intake ducting extends to the top of eddy flow inlet plenum along the central shaft of collection chamber, the sidewall of collection chamber is provided with venting port, be provided with the sub-retaining plate of eddy flow on the top of eddy flow inlet plenum, inner chamber is provided with eddy flow group, center at the sub-retaining plate of eddy flow is processed with inlet mouth, intake ducting extends in the inlet mouth, the outside at inlet mouth is processed with ventilating pit, the vapor pipe of eddy flow group passes the top that ventilating pit extends to the sub-retaining plate of eddy flow, eddy flow group is formed by being distributed in two eddy flow on the concentric circumference, the inlet mouth height difference of adjacent two eddy flow on skin, the sub-inlet mouth height of two eddy flows separately is identical, the inlet mouth of eddy flow of in the vertical direction internal layer is lower than the inlet mouth of outer field eddy flow, and outer field eddy flow is staggered at different circumference with eddy flow of internal layer, eddy flow is opposite with the airintake direction of adjacent eddy flow on same layer, the discharge nozzle of each eddy flow is provided with anti-spigot, the lower end of each eddy flow extends to the top of dust collection chamber, the top sidewall of dust collection chamber is provided with airway, and the discharge port of dust collection chamber is arranged on the bottom.
Above-mentioned eddy flow is: the top at housing is provided with escape pipe, and about the centrosymmetric left inlet mouth of housing and right inlet mouth, the middle part of housing is conical shell to the processing of housing top along the sidewall tangential direction, and the bottom of conical shell is provided with discharge nozzle.
Above-mentioned internal layer eddy flow is spaced apart 100～200mm with the smallest tier of outer eddy flow, is divided into 100～200mm at the interlayer between eddy flow and adjacent eddy flow on the skin.
Above-mentioned strainer is: be processed with opening for feed at the feeding bin top, the crooked pipeline that passes the feeding bin bottom is set on the sidewall, filtering cabin is arranged on the below of feeding bin, coaxial interior retaining tube and the outer tube that keeps off of arranging in the filtering cabin, interior retaining tube is arranged on the outside of crooked pipeline, separate with feeding bin by dividing plate at the top, the end of crooked pipeline passes out below the hole at dividing plate center extends to dividing plate, top and the feeding bin UNICOM of outer retaining tube, the bottom of outer retaining tube and the filtrate collecting bin UNICOM that is arranged on the below of filtering cabin, arranged outside at filtering cabin and filtrate collecting bin has enclosed exhaust plenum, and sidewall is processed with venting port in the lower end of enclosed exhaust plenum.
The ash bucket of the annular plate that retaining tube is distributed by venetian blind type in above-mentioned, at least two built-in inserted plates and bottom opening is formed, the below that ash bucket is arranged on annular plate extends in the filtrate collecting bin and filtrate collecting bin UNICOM, the longitudinal cross-section of each annular plate is inverted-V-shaped, the upper end of built-in inserted plate is fixed on the upper spacer, built-in inserted plate is provided with the slot of inclination, one side of annular plate is inserted in the slot, angle α between the biside plate of annular plate is 60 °, and the pitch angle of the left side bus of its longitudinal cross-section of annular plate is 45 °～65 °;
Above-mentioned outer retaining tube is made up of with outer plate the outer baffle that venetian blind type distributes, outer baffle is laterally inclined ring bodies, the angle of inclination beta of the left side bus of its longitudinal cross-section is 105 °～125 °, one side of outer plate is fixed on the inwall of enclosed exhaust plenum, opposite side is provided with the skewed slot identical with the inclination angle of outer baffle, and outer baffle inserts in the skewed slot.
The spacing of an annular plate and an adjacent annular plate is 10～50mm, and the spacing of an outer baffle and an adjacent outer baffle is 10～50mm.
Retaining tube in above-mentioned is or/and outer retaining tube is the cylinder that has mesh, and the shape of mesh is circle or bar shaped, and porosity is 15%～30%.
A kind of method for dust removal that uses above-mentioned raw gas cleaning apparatus, formed by following steps:
(1) raw gas that produces of pyrolysis enters eddy flow group tornado dust collector by intake ducting, and solid particulate is separated from the gas carry out cyclonic separation in eddy flow group tornado dust collector after, gas is discharged through venting port, and solid particulate is discharged through discharge port;
(2) organize the tornado dust collector expellant gas enters strainer by pipeline inlet mouth from eddy flow, discharge through gas behind the media filtration in the strainer, coal ash is held back by filtrate, and is taken away by the filtrate that flows, and the gas speed that gas passes filter material layer is 0.08～0.35m/m
2.s, the velocity of flow of filtrate is 20～150cm/t, the particle diameter 1～5mm of filtrate;
(3) filtrate enters riser tube after discharging from the bottom of strainer, promotes by 500～550 ℃ hot flue gases, and the accelerating sections flow velocity of riser tube is 16～21m/s, and the braking section flow velocity is 8～12m/s;
(4) filtrate enters in the sedimentation sootblower after the riser tube lifting is heated to 400～550 ℃, the returning charge awl of filtrate in the sedimentation sootblower returns the particles settling chamber that falls into the sedimentation sootblower, dusty gas is discharged through the venting port of particles settling chamber, the gas speed of particles settling chamber is 0.8～2m/s, and the filtrate that falls into the particles settling chamber enters the filtrate entrance that enters strainer after surge bunker cushions by relief outlet.
Above-mentioned steps (1) is specifically: the raw gas that pyrolysis produces enters in the eddy flow inlet plenum by intake ducting, at the upper, middle and lower different heights, enter into from left inlet mouth, right inlet mouth with 180 ° reverse directions and to carry out the cyclonic separation dedusting in eddy flow, after the separation, gas comes together in the collection chamber and discharges through venting port, and solid particulate enters dust collection chamber and discharged by discharge port through the lower end of eddy flow;
Above-mentioned steps (2) is specifically: from the collection chamber expellant gas of eddy flow group tornado dust collector and the inlet mouth that enters strainer after dust collection chamber airway expellant gas mixes, the part of coal ash deposition is taken away with filtrate in the bottom of interior retaining tube in filtering cabin, gas transverse passes filter material layer through the annular space of interior retaining tube, enter enclosed exhaust plenum from the annular space of outer retaining tube, venting port by enclosed exhaust plenum is discharged, coal ash is held back by filtrate, and is taken away by the filtrate that flows.
Raw gas cleaning apparatus provided by the invention and method are to have utilized the cyclone dust removal of eddy flow group to be combined with granular bed filter, and further utilize the hot flue gas of riser tube to promote, filtrate is carried out fluidisation to be blown grey settlement separate, and after the surge chamber buffering, return strainer and carry out recycle, the present invention removes the coal ash in the raw gas effectively, removal efficient height, working method is simple, filtrate can also recycle, save processing cost, and device of the present invention is stable, and equipment is simple, and is workable.
Description of drawings
Fig. 1 is the structural representation of the device of embodiment 1.
Fig. 2 is the structural representation of eddy flow group tornado dust collector 1 among Fig. 1.
Fig. 3 is that the A-A of Fig. 2 is to view.
Fig. 4 is the structural representation of the strainer 2 among Fig. 1.
Fig. 5 is that the B-B of Fig. 4 is to view.
Fig. 6 is the partial enlarged drawing of I among Fig. 4.
Fig. 7 is the partial enlarged drawing of II among Fig. 4.
Fig. 8 is the structural representation of the sedimentation sootblower 4 among Fig. 1.
Embodiment
Now in conjunction with the accompanying drawings and embodiments technical scheme of the present invention is further specified, but the present invention is not limited only to following embodiment.
As shown in Figure 1, the raw gas cleaning apparatus in the present embodiment is to be connected by eddy flow group tornado dust collector 1, strainer 2, riser tube 3, sedimentation sootblower 4 and surge bunker 5 to constitute.
Air outlet at eddy flow group tornado dust collector 1 is connected with strainer 2 by pipeline, the outlet of the filtrate of strainer 2 is by the hot smoke inlet end UNICOM of pipeline and riser tube 3, the exhanst gas outlet of riser tube 3 extends in the settling pocket of sedimentation sootblower 4, the feeding mouth of the discharge port of sedimentation sootblower 4 and surge bunker 5 is by pipeline UNICOM, and the filtrate entrance of the outlet of surge bunker 5 and strainer 2 is by pipeline UNICOM.
Wherein, eddy flow group tornado dust collector 1 are by intake ducting 1-1, collection chamber 1-2, the sub-retaining plate 1-3 of eddy flow, eddy flow inlet plenum 1-4, eddy flow group 1-5, anti-spigot 1-6, airway 1-7 and the 1-8 of dust collection chamber connect formation, referring to Fig. 2 and Fig. 3, at the top of collection chamber 1-2 intake ducting 1-1 is installed, intake ducting 1-1 extends to the eddy flow inlet plenum 1-4 top of collection chamber 1-2 below along the central shaft of collection chamber 1-2, be processed with venting port on the top of collection chamber 1-2, the sub-retaining plate 1-3 of eddy flow of the welded top of eddy flow inlet plenum 1-4, the center of the sub-retaining plate 1-3 of eddy flow is processed with an inlet mouth, the end of intake ducting 1-1 extends in the inlet mouth, the inlet mouth periphery of the sub-retaining plate 1-3 of eddy flow is processed with ventilating pit, ventilating pit is to be distributed on two concentric(al) circless, eddy flow group 1-5 is installed in eddy flow inlet plenum 1-4, eddy flow group 1-5 is made up of 24 eddy flow that are distributed on two concentric(al) circless, outer uniform 16, uniform 8 of internal layer, the structure of eddy flow is that the welded top at housing has the escape pipe outside enclosure interior extends to housing, tangential direction on the top of housing along sidewall offers left inlet mouth and right inlet mouth, left side inlet mouth and right inlet mouth centrosymmetry on housing, flow to identical, the assurance cyclonic separation is effective, the middle part of housing is conical shell, in the bottom of conical shell discharge nozzle is arranged.The ventilating pit that the escape pipe end of each eddy flow passes the sub-retaining plate 1-3 of eddy flow extends to the top of the sub-retaining plate 1-3 of eddy flow, the escape pipe outer wall is welded on the sub-retaining plate 1-3 of eddy flow, the discharge nozzle of eddy flow extends in the 1-8 of dust collection chamber of below, be welded on the top board of the 1-8 of dust collection chamber, at the discharge nozzle pin of eddy flow anti-spigot 1-6 be installed.The sub-1-5-2 of eddy flow that is distributed in internal layer be distributed in the sub-1-5-1 of outer field eddy flow and be staggered at different circumference, namely the orthographicprojection center of 1 sub-1-5-2 of internal layer eddy flow of 2 sub-1-5-1 of outer eddy flow and correspondence position constitutes equilateral triangle, the inlet mouth of the sub-1-5-1 of the outer eddy flow of in the vertical direction is than the inlet mouth height of eddy flow of internal layer, and the inlet mouth height difference of outer field adjacent two eddy flow, the height of two eddy flow separately is identical, in, the sub-1-5-1 of outer eddy flow, the 1-5-2 inlet mouth is three grades of distributions, every two-stage interlayer is divided into 150mm, airintake direction between every adjacent two eddy flow on internal layer and the skin is opposite, the centrifugal force of having cancelled out each other and having produced, the 1-8 of dust collection chamber is funnel shaped, discharge port processing is in the bottom of the 1-8 of dust collection chamber, top center position at the 1-8 of dust collection chamber raises up, sidewall at bossing is equipped with airway 1-7, the gas in the 1-8 of dust collection chamber can be discharged.Raw gas enters in the eddy flow inlet plenum 1-4 from intake ducting 1-1, enter in the housing of eddy flow from the left inlet mouth of eddy flow, right inlet mouth, carry out cyclonic separation, coal ash drained in the 1-8 of dust collection chamber by discharge nozzle discharge, focus on, the gas of separating is drained in the collection chamber 1-2 by escape pipe, discharge from the venting port of collection chamber 1-2.
From the venting port expellant gas of eddy flow group tornado dust collector 1 be delivered to strainer 2 after airway 1-7 expellant gas mixes transmission pipeline.
Referring to Fig. 4, strainer 2 is to be connected by feeding bin 2-1, crooked pipeline 2-2, filtering cabin 2-3, interior retaining tube 2-4, outer retaining tube 2-5, filtrate collecting bin 2-6, enclosed exhaust plenum 2-7 to constitute.
Top at feeding bin 2-1 is processed with opening for feed, quartz sand enters in the feeding bin 2-1 from opening for feed, sidewall at feeding bin 2-1 is processed with inlet mouth, the bottom that inlet mouth passes feeding bin 2-1 by crooked pipeline 2-2 extends to the below of feeding bin 2-1, mixes then entering filtering cabin 2-3 by crooked pipeline 2-2 with airway 1-7 expellant gas from the venting port expellant gas of eddy flow group tornado dust collector 1.Referring to Fig. 5, retaining tube 2-4 and an outer retaining 2-5 in filtering cabin 2-3, being equipped with, interior retaining tube 2-4 and the coaxial setting of 2-5 of outer retaining, the top of interior retaining tube 2-4 is provided with dividing plate 2-4-4, center at dividing plate 2-4-4 has centre hole, the centre hole that the end of crooked pipeline 2-2 passes dividing plate 2-4-4 extends to the below of dividing plate 2-4-4, and dividing plate 2-4-4 is welded on the crooked pipeline 2-2 outer wall.Referring to Fig. 7, in the ash bucket 2-4-3 of 15 annular plate 2-4-1 being distributed by venetian blind type of retaining tube 2-4 and 6 built-in inserted plate 2-4-2 and bottom opening form, the longitudinal cross-section of each annular plate 2-4-1 is inverted-V-shaped, angle α between the both sides is 60 °, be that the longitudinal cross-section left side bus of inverted-V-shaped annular plate 2-4-1 and the angle between the horizontal plane are 60 °, the spacing between two adjacent annular plate 2-4-1 is 35mm up and down.6 built-in inserted plate 2-4-2 are evenly distributed on the inboard of annular plate 2-4-1, the upper end of built-in inserted plate 2-4-2 is welded on the upper spacer 2-4-4, and the terminal outer wall of sidewall and crooked pipeline 2-2 and top board weld together, be processed with the slot of 15 inclinations at the opposite side of each built-in inserted plate 2-4-2, insert in the slot inboard of inverted-V-shaped annular plate 2-4-1, constitute the interior retaining tube 2-4 cylindrical shell of columnar venetian blind type, a funnel shaped ash bucket 2-4-3 is installed below cylindrical shell, the bottom of ash bucket 2-4-3 extends in the filtrate collecting bin 2-6, with filtrate collecting bin 2-6 UNICOM, the part coal ash that deposits owing to the effect of mass force in the retaining tube 2-4 in collecting.Outside the arranged outside of interior retaining tube 2-4, keep off a 2-5, referring to Fig. 6, outer retaining tube 2-5 top and feeding bin 2-1 UNICOM, it is made up of with outer plate 2-5-1 the outer baffle 2-5-2 that venetian blind type distributes, outer baffle 2-5-2 is 15, geometrical shape is laterally inclined ring texture, and the angle of inclination beta of the left side bus of its longitudinal cross-section is 120 °, namely with the pitch angle complementation of left side, the longitudinal cross-section bus of the outer panel of inverted-V-shaped annular plate 2-4-1.Outer plate 2-5-1 has 16, periphery along outer baffle 2-5-2 is evenly distributed on the circumference, the outer ledge of outer plate 2-5-1 keeps off on the inwall of the enclosed exhaust plenum 2-7 in the 2-5 outside outside by bolting, be processed with skewed slot on the inner side edge of outer plate 2-5-1, the angle of inclination of skewed slot is identical with the angle of inclination of outer baffle 2-5-2, the upper edge of outer baffle 2-5-2 is inserted in the skewed slot and is fixed on the outer plate 2-5-1, spacing between outer baffle 2-5-2 and the adjacent outer baffle 2-5-2 is 35mm, forms the venetian blind type structure.Filtrate collecting bin 2-6 below filtering cabin 2-3 is funnel-shaped structure, the filtrate outlet is in the bottom of filtrate collecting bin 2-6, filtrate collecting bin 2-6, outer retaining tube 2-5 and feeding bin 2-1 UNICOM, the filtrate that opening for feed enters keeps off outside feeding bin 2-1 is moved downward between tube 2-5 and the interior retaining tube 2-4, enter at last in the filtrate collecting bin 2-6, compile the back and discharge from the filtrate outlet.Arranged outside at filtering cabin 2-3 and filtrate collecting bin 2-6 has enclosed exhaust plenum 2-7, the gas that enters from inlet mouth is at interior retaining tube 2-4 internal diffusion, annular space in passing between the annular plate 2-4-1 of retaining tube 2-4, enter enclosed exhaust plenum 2-7 through the annular space between the outer baffle 2-5-2 of retaining tube 2-5 outside the gas part is passed again behind the quartz sand filtration between an interior retaining 2-4 and the outer retaining tube 2-5, the gas after the filtration compiles the back from enclosed exhaust plenum 2-7 and discharges from the venting port of enclosed exhaust plenum 2-7 lower end sidewall.
From the hot smoke inlet end UNICOM of the filtrate of strainer 2 outlet by pipeline and riser tube 3, the hypomere of riser tube 3 is accelerating sections, and gas speed is 19m/s, and the epimere of riser tube 3 is braking section, braking section gas speed is 10m/s, and the upper end of riser tube 3 extends in the sedimentation sootblower 4.
Referring to Fig. 8, sedimentation sootblower 4 is common sedimentation sootblower 4 structures, and the top of its housing is particle returning charge awl 4-1, and the bottom is particles settling chamber 4-2, and the top is venting port, and discharge gate is arranged at the bottom.The upper end exhanst gas outlet of riser tube 3 passes particles settling chamber 4-2 from the bottom of housing, dusty gas is discharged through the venting port of settling pocket, and quartz sand returns through the indoor returning charge awl 4-1 of particles settling and falls into settling pocket, discharges by pipeline through discharge gate.
The discharge gate of sedimentation sootblower 4 is common surge bunkers 5 by the feeding mouth UNICOM of pipeline and surge bunker 5 from surge bunker 5, enters the quartz sand of surge bunker 5 by the filtrate entrance of pipe-line transportation to strainer 2, carries out recycle.
The method of utilizing above-mentioned raw gas cleaning apparatus to carry out dedusting is made up of following steps:
(1) the generation temperature that produces of pyrolysis is that 400～550 ℃, pressure enter in the eddy flow inlet plenum 1-4 by intake ducting 1-1 for the raw gas of-5～50KPa, enter into from left and right inlet mouth with 180 ° clockwise direction at the upper, middle and lower different heights and to carry out the cyclonic separation dedusting in eddy flow, after the separation, gas comes together in the collection chamber 1-2 and discharges through venting port, and solid particulate enters the 1-8 of dust collection chamber and discharged by discharge port through the lower end of eddy flow.
(2) mix the back enters strainer 2 from the inlet mouth of strainer 2 filtering cabin 2-3 with the 1-8 of dust collection chamber airway 1-7 expellant gas from collection chamber 1-2 expellant gas, the part of coal ash deposition is taken away with quartz sand in the bottom of interior retaining tube 2-4 in filtering cabin 2-3, gas transverse passes filter material layer through the annular space of interior retaining tube 2-4, enter enclosed exhaust plenum 2-7 from the annular space of outer retaining tube 2-5, venting port by enclosed exhaust plenum 2-7 is discharged, coal ash is held back by quartz sand, and taken away by the quartz sand that flows, the gas speed that gas passes filter material layer is 0.2m/m
2.s, the velocity of flow of quartz sand is 80cm/t, and the particle diameter of quartz sand is 1～5mm;
(3) quartz sand enters riser tube 3 after discharging from the bottom of strainer 2, promotes by 530 ℃ hot flue gases, and the accelerating sections gas speed of riser tube 3 is 18m/s, and braking section gas speed is 10m/s;
(4) quartz sand enters in the sedimentation sootblower 4 after riser tube 3 liftings are heated to 530 ℃, returning charge awl 4-1 in sedimentation sootblower 4 returns the particles settling chamber 4-2 that falls into sedimentation sootblower 4, dusty gas is discharged through the venting port of particles settling chamber 4-2, the gas speed of particles settling chamber 4-2 is 1.5m/s, the quartz sand that falls into particles settling chamber 4-2 enters the filtrate entrance that enters strainer 2 after surge bunker 5 cushions, further recycle by relief outlet.
In above-described embodiment 1, eddy flow group 1-5 in the eddy flow group tornado dust collector 1 is made up of 27 eddy flow that are distributed on two concentric(al) circless, outer uniform 18, uniform 9 of internal layer, the structure of eddy flow is that the welded top at housing has the escape pipe outside enclosure interior extends to housing, tangential direction on the top of housing along sidewall offers about the centrosymmetric left inlet mouth of housing and right inlet mouth, and lower part of frame is conical shell, in the bottom of conical shell discharge nozzle is arranged.The ventilating pit that the escape pipe end of each eddy flow passes the sub-retaining plate 1-3 of eddy flow extends to the top of the sub-retaining plate 1-3 of eddy flow, the escape pipe outer wall is welded on the sub-retaining plate 1-3 of eddy flow, the discharge nozzle of eddy flow extends in the 1-8 of dust collection chamber of below, be welded on the top board of the 1-8 of dust collection chamber, at the discharge nozzle pin of eddy flow anti-spigot 1-6 be installed.Be distributed in eddy flow of internal layer and be distributed in outer field eddy flow fork row, the inlet mouth of the sub-1-5-1 of the outer eddy flow of in the vertical direction is than the inlet mouth height of eddy flow of internal layer, and the inlet mouth height difference of outer field adjacent two eddy flow, the height of two eddy flow separately is identical, the sub-inlet mouth of eddy flow of inside and outside layer is three grades of distributions, every two-stage interlayer is divided into 100mm, and the airintake direction between every adjacent two eddy flow on internal layer and the skin is opposite.Other parts and connecting relation thereof are identical with embodiment 1.
The longitudinal cross-section of each annular plate 2-4-1 is inverted-V-shaped in the strainer 2, angle α between the both sides is 60 °, the pitch angle that is left side, the outer panel longitudinal cross-section bus of inverted-V-shaped annular plate 2-4-1 is 45 °, and the spacing between an annular plate 2-4-1 and another annular plate 2-4-1 is 10mm.6 built-in inserted plate 2-4-2 are evenly distributed on the inboard of annular plate 2-4-1, the upper end of built-in inserted plate 2-4-2 is welded on the upper spacer 2-4-4, and the terminal outer wall of sidewall and crooked pipeline 2-2 welds together, be processed with the slot of 20 inclinations at the opposite side of each built-in inserted plate 2-4-2, insert in the slot inboard of inverted-V-shaped annular plate 2-4-1, constitute the interior retaining tube 2-4 cylindrical shell of columnar venetian blind type, a funnel shaped ash bucket 2-4-3 is installed below cylindrical shell, the bottom of ash bucket 2-4-3 extends in the filtrate collecting bin 2-6, with filtrate collecting bin 2-6 UNICOM.Outside the arranged outside of interior retaining tube 2-4, keep off a 2-5, outer retaining tube 2-5 top and feeding bin 2-1 UNICOM, it is made up of with outer plate 2-5-1 the outer baffle 2-5-2 that venetian blind type distributes, outer baffle 2-5-2 is 20, geometrical shape is laterally inclined ring texture, the angle of inclination beta of the left side bus of its longitudinal cross-section is 105 °, namely with the pitch angle complementation of left side, the outer panel longitudinal cross-section of inverted-V-shaped annular plate 2-4-1 bus.Outer plate 2-5-1 is 16, periphery along outer baffle 2-5-2 is evenly distributed on the circumference, the outer ledge of outer plate 2-5-1 keeps off on the inwall of the enclosed exhaust plenum 2-7 in the 2-5 outside outside by bolting, be processed with skewed slot on the inner side edge of outer plate 2-5-1, the angle of inclination of skewed slot is identical with the angle of inclination of outer baffle 2-5-2, the upper edge of outer baffle 2-5-2 is inserted in the skewed slot and is fixed on the outer plate 2-5-1, spacing between outer baffle 2-5-2 and the adjacent outer baffle 2-5-2 is 10mm, forms the venetian blind type structure.Other parts and connecting relation thereof are identical with embodiment 1.
The structure of riser tube 3, sedimentation sootblower 4 and surge bunker 5 is identical with embodiment 1, and its connecting relation is identical with embodiment 1.
It is identical with embodiment 1 to utilize above-mentioned raw gas cleaning apparatus to carry out the method for dedusting.
In above-described embodiment 1, eddy flow group 1-5 in the eddy flow group tornado dust collector 1 is made up of 30 eddy flow that are distributed on two concentric(al) circless, outer uniform 20, uniform 10 of internal layer, the structure of eddy flow is that the welded top at housing has the escape pipe outside enclosure interior extends to housing, tangential direction on the top of housing along sidewall offers about the centrosymmetric left inlet mouth of housing and right inlet mouth, and the middle part of housing is conical shell, in the bottom of conical shell discharge nozzle is arranged.The ventilating pit that the escape pipe end of each eddy flow passes the sub-retaining plate 1-3 of eddy flow extends to the top of the sub-retaining plate 1-3 of eddy flow, the escape pipe outer wall is welded on the sub-retaining plate 1-3 of eddy flow, the discharge nozzle of eddy flow extends in the 1-8 of dust collection chamber of below, be welded on the top board of the 1-8 of dust collection chamber, at the discharge nozzle pin of eddy flow anti-spigot 1-6 be installed.Be distributed in eddy flow of internal layer and be distributed in outer field eddy flow fork row, the inlet mouth of the sub-1-5-1 of the outer eddy flow of in the vertical direction is than the inlet mouth height of eddy flow of internal layer, and the inlet mouth height difference of outer field adjacent two eddy flow, the height of two eddy flow separately is identical, the sub-inlet mouth of eddy flow of inside and outside layer is three grades of distributions, every two-stage interlayer is divided into 200mm, and the airintake direction between every adjacent two eddy flow on internal layer and the skin is opposite.Other parts and connecting relation thereof are identical with embodiment 1.
The longitudinal cross-section of each annular plate 2-4-1 is inverted-V-shaped in the strainer 2, angle α between the both sides is 60 °, the pitch angle that is left side, the outer panel longitudinal cross-section bus of inverted-V-shaped annular plate 2-4-1 is 65 °, and the spacing between an annular plate 2-4-1 and another annular plate 2-4-1 is 50mm.6 built-in inserted plate 2-4-2 are evenly distributed on the inboard of annular plate 2-4-1, the upper end of built-in inserted plate 2-4-2 is welded on the upper spacer 2-4-4, and the terminal outer wall of sidewall and crooked pipeline 2-2 welds together, be processed with the slot of 20 inclinations at the opposite side of each built-in inserted plate 2-4-2, insert in the slot inboard of inverted-V-shaped annular plate 2-4-1, constitute the interior retaining tube 2-4 cylindrical shell of columnar venetian blind type, a funnel shaped ash bucket 2-4-3 is installed below cylindrical shell, the bottom of ash bucket 2-4-3 extends in the filtrate collecting bin 2-6, with filtrate collecting bin 2-6 UNICOM.Outside the arranged outside of interior retaining tube 2-4, keep off a 2-5, top and the feeding bin 2-1 UNICOM of outer retaining tube 2-5, it is made up of with outer plate 2-5-1 the outer baffle 2-5-2 that venetian blind type distributes, outer baffle 2-5-2 is 20, geometrical shape is laterally inclined ring texture, the angle of inclination beta of the left side bus of its longitudinal cross-section is 125 °, namely with the pitch angle complementation of left side, the outer panel longitudinal cross-section of inverted-V-shaped annular plate 2-4-1 bus.Outer plate 2-5-1 is 16, periphery along outer baffle 2-5-2 is evenly distributed on the circumference, the outer ledge of outer plate 2-5-1 keeps off on the inwall of the enclosed exhaust plenum 2-7 in the 2-5 outside outside by bolting, be processed with skewed slot on the inner side edge of outer plate 2-5-1, the angle of inclination of skewed slot is identical with the angle of inclination of outer baffle 2-5-2, the upper edge of outer baffle 2-5-2 is inserted in the skewed slot and is fixed on the outer plate 2-5-1, spacing between outer baffle 2-5-2 and the adjacent outer baffle 2-5-2 is 50mm, forms the venetian blind type structure.Other parts and connecting relation thereof are identical with embodiment 1.
The structure of riser tube 3, sedimentation sootblower 4 and surge bunker 5 is identical with embodiment 1, and its connecting relation is identical with embodiment 1.
It is identical with embodiment 1 to utilize above-mentioned raw gas cleaning apparatus to carry out the method for dedusting.
Embodiment 4
In the present embodiment, interior retaining tube 2-4 is that to have the aperture by sidewall be that cylindrical body and the doline ash bucket 2-4-3 of the circular mesh of 3mm constitutes, and the porosity of cylindrical body is 22%, and separate with feeding bin 2-1 by dividing plate 2-4-4 at the top of interior retaining tube 2-4.An outer retaining tube 2-5 is that sidewall has the cylindrical body that the aperture is the circular mesh of 3mm, and its porosity is 22%, its two ends respectively with feeding bin 2-1 and filtrate collecting bin 2-6 UNICOM, other parts and connecting relation thereof are identical with embodiment 1.
In method for dust removal, the particle diameter of quartz sand should be greater than the aperture of outer retaining tube 2-5 and interior retaining tube 2-4, and other step is identical with embodiment 1.
Embodiment 5
In the present embodiment, interior retaining tube 2-4 is cylindrical body and the doline ash bucket 2-4-3 formation that is had the bar shaped mesh of 3 * 5mm by sidewall, and the porosity of cylindrical body is 15%, and separate with feeding bin 2-1 by dividing plate 2-4-4 at the top of interior retaining tube 2-4.An outer retaining tube 2-5 is the cylindrical body that sidewall has the bar shaped mesh of 3 * 5mm, and its porosity is 30%, its two ends respectively with feeding bin 2-1 and filtrate collecting bin 2-6 UNICOM, other parts and connecting relation thereof are identical with embodiment 1.
In method for dust removal, the particle diameter of quartz sand should be greater than the aperture of outer retaining tube 2-5 and interior retaining tube 2-4, and other step is identical with embodiment 1.
Embodiment 6
In the present embodiment, interior retaining tube 2-4 is cylindrical body and the doline ash bucket 2-4-3 formation that is had the bar shaped mesh of 3 * 5mm by sidewall, and the porosity of cylindrical body is 30%, and separate with feeding bin 2-1 by dividing plate 2-4-4 at the top of interior retaining tube 2-4.An outer retaining tube 2-5 is that sidewall has the cylindrical body that the aperture is the circular mesh of 3mm, and its porosity is 15%, its two ends respectively with feeding bin 2-1 and filtrate collecting bin 2-6 UNICOM, other parts and connecting relation thereof are identical with embodiment 1.
In method for dust removal, the particle diameter of quartz sand should be greater than the aperture of outer retaining tube 2-5 and interior retaining tube 2-4, and other step is identical with embodiment 1.
Embodiment 7
In the step of the method for dust removal of above-described embodiment 1～6 (2), mix the back enters strainer 2 from the inlet mouth of strainer 2 filtering cabin 2-3 with the 1-8 of dust collection chamber airway 1-7 expellant gas from collection chamber 1-2 expellant gas, the part of coal ash deposition is taken away with quartz sand in the bottom of interior retaining tube 2-4 in filtering cabin 2-3, gas transverse passes filter material layer through the annular space of interior retaining tube 2-4, enter enclosed exhaust plenum 2-7 from the annular space of outer retaining tube 2-5, venting port by enclosed exhaust plenum 2-7 is discharged, coal ash is held back by quartz sand, and taken away by the quartz sand that flows, the gas speed that gas passes filter material layer is 0.08m/m
2.s, the velocity of flow of quartz sand is 20cm/t, the granularity 1～5mm of quartz sand.In step (3), filtrate enters riser tube 3 after discharging from the bottom of strainer 2, promotes by 500 ℃ hot flue gases, and the accelerating sections gas speed of riser tube 3 is 16m/s, and braking section gas speed is 8m/s.In step (4), filtrate enters in the sedimentation sootblower 4 after riser tube 3 liftings are heated to 500 ℃, the returning charge awl of filtrate in sedimentation sootblower 4 returns the particles settling chamber 4-2 that falls into sedimentation sootblower 4, dusty gas is discharged through the venting port of particles settling chamber 4-2, the gas speed of particles settling chamber 4-2 is 0.8m/s, and the filtrate that falls into particles settling chamber 4-2 enters the filtrate entrance that enters strainer 2 after surge bunker 5 cushions by relief outlet.Other step is identical with corresponding embodiment.
Embodiment 8
In the step of the method for dust removal of above-described embodiment 1～6 (2), mix the back enters strainer 2 from the inlet mouth of strainer 2 filtering cabin 2-3 with the 1-8 of dust collection chamber airway 1-7 expellant gas from collection chamber 1-2 expellant gas, the part of coal ash deposition is taken away with quartz sand in the bottom of interior retaining tube 2-4 in filtering cabin 2-3, gas transverse passes filter material layer through the annular space of interior retaining tube 2-4, enter enclosed exhaust plenum 2-7 from the annular space of outer retaining tube 2-5, venting port by enclosed exhaust plenum 2-7 is discharged, coal ash is held back by quartz sand, and taken away by the quartz sand that flows, the gas speed that gas passes filter material layer is 0.35m/m
2.s, the velocity of flow of quartz sand is 150cm/t, the granularity 1～5mm of quartz sand.In step (3), filtrate enters riser tube 3 after discharging from the bottom of strainer 2, promotes by 550 ℃ hot flue gases, and the accelerating sections gas speed of riser tube 3 is 21m/s, and braking section gas speed is 12m/s.In step (4), filtrate enters in the sedimentation sootblower 4 after riser tube 3 liftings are heated to 550 ℃, the returning charge awl of filtrate in sedimentation sootblower 4 returns the particles settling chamber 4-2 that falls into sedimentation sootblower 4, dusty gas is discharged through the venting port of particles settling chamber 4-2, the gas speed of particles settling chamber 4-2 is 2m/s, and the filtrate that falls into particles settling chamber 4-2 enters the filtrate entrance that enters strainer 2 after surge bunker 5 cushions by relief outlet.Other step is identical with corresponding embodiment.
Embodiment 9
At the method for dust removal of above-described embodiment 1～8, used filtrate quartz sand can be replaced with other filtrates such as the peridotites that waits particle diameter or aluminium sesquioxides in step (2), and other step is identical with corresponding embodiment.
Claims (10)
1. raw gas cleaning apparatus, it is characterized in that: the air outlet at eddy flow group tornado dust collector (1) is connected with strainer (2) by pipeline, the outlet of the filtrate of strainer (2) is by the hot smoke inlet end UNICOM of pipeline and riser tube (3), the exhanst gas outlet of riser tube (3) extends in the settling pocket of sedimentation sootblower (4), the discharge port of sedimentation sootblower (4) is by the feeding mouth UNICOM of pipeline and surge bunker (5), and the outlet of surge bunker (5) is by the filtrate entrance UNICOM of pipeline and strainer (2).
2. raw gas cleaning apparatus according to claim 1, it is characterized in that described eddy flow group tornado dust collector (1) are: be provided with intake ducting (1-1) at the top of collection chamber (1-2), intake ducting (1-1) extends to the top of eddy flow inlet plenum (1-4) along the central shaft of collection chamber (1-2), the sidewall of collection chamber (1-2) is provided with venting port, be provided with the sub-retaining plate of eddy flow (1-3) on the top of eddy flow inlet plenum (1-4), inner chamber is provided with eddy flow group (1-5), center at the sub-retaining plate of eddy flow (1-3) is processed with inlet mouth, intake ducting (1-1) extends in the inlet mouth, the outside at inlet mouth is processed with ventilating pit, the vapor pipe of eddy flow group (1-5) passes the top that ventilating pit extends to the sub-retaining plate of eddy flow (1-3), eddy flow group (1-5) is formed by being distributed in two eddy flow on the concentric circumference, the inlet mouth height difference of adjacent two eddy flow on skin, the sub-inlet mouth height of two eddy flows separately is identical, the inlet mouth of eddy flow of in the vertical direction internal layer is lower than the inlet mouth of outer field eddy flow, and outer field eddy flow is staggered at different circumference with eddy flow of internal layer, eddy flow is opposite with the airintake direction of adjacent eddy flow on same layer, the discharge nozzle of each eddy flow is provided with anti-spigot (1-6), the lower end of each eddy flow extends to the top of dust collection chamber (1-8), the top sidewall of dust collection chamber (1-8) is provided with airway (1-7), and the discharge port of dust collection chamber (1-8) is arranged on the bottom.
3. raw gas cleaning apparatus according to claim 2, it is characterized in that described eddy flow is: the top at housing is provided with escape pipe, housing top processes along the sidewall tangential direction about the centrosymmetric left inlet mouth of housing and right inlet mouth, the middle part of housing is conical shell, and the bottom of conical shell is provided with discharge nozzle.
4. raw gas cleaning apparatus according to claim 2, it is characterized in that: described internal layer eddy flow (1-5-2) is spaced apart 100～200mm with the smallest tier of outer eddy flow (1-5-1), is divided into 100～200mm at the interlayer between eddy flow and adjacent eddy flow on the skin.
5. raw gas cleaning apparatus according to claim 1, it is characterized in that described strainer (2) is: be processed with opening for feed at feeding bin (2-1) top, the crooked pipeline (2-2) that passes feeding bin (2-1) bottom is set on the sidewall, filtering cabin (2-3) is arranged on the below of feeding bin (2-1), keep off tube (2-4) and outer retaining tin (2-5) in the filtering cabin (2-3) in coaxial the setting, interior retaining tube (2-4) is arranged on the outside of crooked pipeline (2-2), separate with feeding bin (2-1) by dividing plate (2-4-4) at the top, the end of crooked pipeline (2-2) passes out in the hole at dividing plate (2-4-4) center and extends to below the dividing plate (2-4-4), top and feeding bin (2-1) UNICOM of outer retaining tube (2-5), the bottom of outer retaining tube (2-5) and filtrate collecting bin (2-6) UNICOM that is arranged on the below of filtering cabin (2-3), arranged outside at filtering cabin (2-3) and filtrate collecting bin (2-6) has enclosed exhaust plenum (2-7), is processed with venting port at the lower end sidewall of enclosed exhaust plenum (2-7).
6. raw gas cleaning apparatus according to claim 5, it is characterized in that: retaining tube (2-4) is the annular plate (2-4-1) that is distributed by venetian blind type in described, the ash bucket (2-4-3) of at least two built-in inserted plates (2-4-2) and bottom opening is formed, the below that ash bucket (2-4-3) is arranged on annular plate (2-4-1) extends in the filtrate collecting bin (2-6) and filtrate collecting bin (2-6) UNICOM, the longitudinal cross-section of each annular plate (2-4-1) is inverted-V-shaped, the upper end of built-in inserted plate (2-4-2) is fixed on the upper spacer (2-4-4), built-in inserted plate (2-4-2) is provided with the slot of inclination, one side of annular plate (2-4-1) is inserted in the slot, angle α between the biside plate of annular plate (2-4-1) is 60 °, and the pitch angle of the left side bus of its longitudinal cross-section of annular plate (2-4-1) is 45 °～65 °;
Described outer retaining tube (2-5) is made up of with outer plate (2-5-1) the outer baffle (2-5-2) that venetian blind type distributes, outer baffle (2-5-2) is laterally inclined ring bodies, the angle of inclination beta of the left side bus of its longitudinal cross-section is 105 °～125 °, one side of outer plate (2-5-1) is fixed on the inwall of enclosed exhaust plenum (2-7), opposite side is provided with the skewed slot identical with the inclination angle of outer baffle (2-5-2), and outer baffle (2-5-2) inserts in the skewed slot.
7. raw gas cleaning apparatus according to claim 6, it is characterized in that: an annular plate (2-4-1) is 10～50mm with the spacing of an adjacent annular plate (2-4-1), and an outer baffle (2-5-2) is 10～50mm with the spacing of an adjacent outer baffle (2-5-2).
8. raw gas cleaning apparatus according to claim 5 is characterized in that: retaining tube (2-4) in described is or/and outer retaining tube (2-5) is the cylinder that has mesh, and the shape of mesh is circle or bar shaped, and porosity is 15%～30%.
9. a right to use requires the method for dust removal of 1 raw gas cleaning apparatus, it is characterized in that being made up of following steps:
(1) raw gas of pyrolysis generation enters eddy flow group tornado dust collector (1) by intake ducting (1-1), after in eddy flow group tornado dust collector (1), carrying out cyclonic separation that solid particulate is separated from the gas, gas is discharged through venting port, and solid particulate is discharged through discharge port;
(2) organize tornado dust collector (1) expellant gas enters strainer (2) by pipeline inlet mouth from eddy flow, discharge through gas behind the media filtration in the strainer (2), coal ash is held back by filtrate, and is taken away by the filtrate that flows, and the gas speed that gas passes filter material layer is 0.08～0.35m/m
2.s, the velocity of flow of filtrate is 20～150cm/t, the particle diameter 1～5mm of filtrate;
(3) filtrate enters riser tube (3) after discharging from the bottom of strainer (2), promotes by 500～550 ℃ hot flue gases, and the accelerating sections flow velocity of riser tube (3) is 16～21m/s, and the braking section flow velocity is 8～12m/s;
(4) filtrate enters in the sedimentation sootblower (4) after riser tube (3) lifting is heated to 400～550 ℃, the returning charge awl (4-1) of filtrate in sedimentation sootblower (4) returns the particles settling chamber (4-2) that falls into sedimentation sootblower (4), dusty gas is discharged through the venting port of particles settling chamber (4-2), the gas speed of particles settling chamber (4-2) is 0.8～2m/s, and the filtrate that falls into particles settling chamber (4-2) enters the filtrate entrance that enters strainer (2) after surge bunker (5) cushions by relief outlet.
10. raw gas method for dust removal according to claim 9, it is characterized in that described step (1) specifically: the raw gas that pyrolysis produces enters in the eddy flow inlet plenum (1-4) by intake ducting (1-1), at the upper, middle and lower different heights, enter into from left inlet mouth, right inlet mouth with 180 ° reverse directions and to carry out the cyclonic separation dedusting in eddy flow, after the separation, gas comes together in the collection chamber (1-2) and discharges through venting port, and solid particulate enters dust collection chamber (1-8) and discharged by discharge port through the lower end of eddy flow;
Above-mentioned steps (2) is specifically: from collection chamber (1-2) expellant gas of eddy flow group tornado dust collector (1) and the inlet mouth that enters strainer (2) after dust collection chamber (1-8) airway (1-7) expellant gas mixes, the part of coal ash deposition is taken away with filtrate in the bottom of interior retaining tube (2-4) in filtering cabin (2-3), gas transverse passes filter material layer through the annular space of interior retaining tube (2-4), enter enclosed exhaust plenum (2-7) from the annular space of outer retaining tube (2-5), venting port by enclosed exhaust plenum (2-7) is discharged, coal ash is held back by filtrate, and is taken away by the filtrate that flows.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103453761A (en) * | 2013-08-30 | 2013-12-18 | 河南省德耀节能科技有限公司 | Shutter type vertical drying machine and material drying system adopting drying machine |
| CN104449782A (en) * | 2014-11-07 | 2015-03-25 | 王树宽 | Pyrolysis dust removal system and pyrolysis dust removal method based on coupling of small-size coal pyrolysis and raw gas dust removal |
| CN114130550A (en) * | 2022-01-29 | 2022-03-04 | 四川凌耘建科技有限公司 | Medium-pressure cyclone sand remover |
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| CN203196504U (en) * | 2013-04-03 | 2013-09-18 | 神木富油能源科技有限公司 | Raw gas dust collection device |
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