CN103205286B - Crude gas dust remover and dust removing method - Google Patents
Crude gas dust remover and dust removing method Download PDFInfo
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- CN103205286B CN103205286B CN201310116325.1A CN201310116325A CN103205286B CN 103205286 B CN103205286 B CN 103205286B CN 201310116325 A CN201310116325 A CN 201310116325A CN 103205286 B CN103205286 B CN 103205286B
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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 dust arrester and the method for the raw coke oven gas that produces in pulverized coal pyrolysis preparing coal tar process.
Background technology
In recent years, low-temperature pyrolysis of coal preparing coal tar has been had widely to research both at home and abroad, but in the raw coke oven gas that the process of producing produces owing to containing a large amount of tar gas, dedusting does not have breakthrough progress, is seriously restricting the development of this industry.
For a kind of method of raw coke oven gas dedusting, be to adopt knockdown cyclone separator at present, separative efficiency is low, cannot the following coal dust of separated 5um, and producing a large amount of greasy filth cannot separation; Another kind method is electric precipitation, because coal tar gasification temperature is high, lower than condensation point, is understanding condensation, and electric precipitation need at high temperature move, the high temperature corrosion of wire electrode cannot solve, and electric precipitation is due to bulky, tar overstand, second pyrolysis seriously makes the yield of tar decline; Pottery, powdered-metal pipe automatic back blow filter besides, and under high temperature, raw coke oven gas constantly raises pressure reduction at tube-surface carbon distribution, and blowback cannot make filter cake come off, and cause the device can not long-term operation.
Summary of the invention
One of object of the present invention is to overcome the existing deficiency of raw coke oven gas dust arrester, a kind of utilize eddy flow subgroup and granular bed filter combination are provided, at high temperature effectively remove the coal ash in raw coke oven gas, stable, the raw coke oven gas dust arrester that efficiency of dust collection is high.
Two of object of the present invention is to provide the raw coke oven gas that a kind of method of operating is simple, efficiency of dust collection is high dust collection method.
The technical scheme adopting solving the problems of the technologies described above is:
Raw coke oven gas dust arrester is by pipeline, to be connected with filter in the gas outlet of eddy flow subgroup cyclone dust collectors, the filtrate outlet of filter is by the hot smoke inlet end UNICOM of pipeline and riser, the exhanst gas outlet of riser extends in the expansion chamber of sedimentation soot blower, the discharging opening of sedimentation soot blower is by the feeding mouth UNICOM of pipeline and surge bunker, and the outlet of surge bunker is by the filtrate entrance UNICOM of pipe-and-filter.
Above-mentioned eddy flow subgroup cyclone dust collectors are: the top at collection chamber is provided with admission line, admission line extends to the top of swirling inlet chamber along the central shaft of collection chamber, on the sidewall of collection chamber, be provided with exhaust outlet, on the top of swirling inlet chamber, be provided with the sub-fixed head of eddy flow, inner chamber is provided with eddy flow subgroup, center at the sub-fixed head of eddy flow is processed with air inlet, admission line extends in air inlet, outside at air inlet is processed with passage, the blast pipe of eddy flow subgroup extends to the top of the sub-fixed head of eddy flow through passage, eddy flow subgroup forms by being distributed in two eddy flow in concentric circumference, on skin, the air inlet height of adjacent two eddy flow is different, the sub-air inlet height of two eddy flows is separately identical, the air inlet of eddy flow of in the vertical direction internal layer is lower than the air inlet of outer field eddy flow, and outer field eddy flow is staggered on different circumference from eddy flow of internal layer, on same layer, eddy flow is contrary with the airintake direction of adjacent eddy flow, on the discharge nozzle of each eddy flow, be provided with anti-spigot, the lower end of each eddy flow extends to the top of dust collection chamber, on the sidewall of the top of dust collection chamber, be provided with wireway, the discharging opening of dust collection chamber is arranged on bottom.
Above-mentioned eddy flow is: the top at housing is provided with escape pipe, and the processing of housing top is along sidewall tangential direction about the centrosymmetric left air inlet of housing and right air inlet, and the middle part of housing is conical shell, 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, and the interlayer on skin between eddy flow and adjacent eddy flow is divided into 100～200mm.
Above-mentioned filter is: at feeding bin top, be processed with charging aperture, crooked pipeline through feeding bin bottom is set on sidewall, filtering cabin is arranged on the below of feeding bin, interior gear cylinder and outer gear cylinder are coaxially set in filtering cabin, interior gear cylinder is arranged on the outside of crooked pipeline, top is separated with feeding bin by dividing plate, the end of crooked pipeline is through opening below the hole at dividing plate center extends to dividing plate, top and the feeding bin UNICOM of outer gear cylinder, the bottom of outer gear cylinder 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, on the sidewall of the lower end of enclosed exhaust plenum, be processed with exhaust outlet.
The ash bucket of the annular slab that above-mentioned interior gear cylinder is distributed by venetian blind type, at least two built-in inserted plates and bottom opening forms, the below that ash bucket is arranged on annular slab extends in filtrate collecting bin and filtrate collecting bin UNICOM, the longitudinal cross-section of each annular slab is inverted V-shaped, the upper end of built-in inserted plate is fixed on upper spacer, on built-in inserted plate, be provided with the slot of inclination, one side of annular slab is inserted in slot, angle α between the biside plate of annular slab is 60 °, and the inclination angle of the left side bus of its longitudinal cross-section of annular slab is 45 °～65 °;
Outer baffle and outer plate that above-mentioned outer gear cylinder is distributed by venetian blind type form, 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, on opposite side, be provided with the skewed slot identical with the inclination angle of outer baffle, outer baffle inserts in skewed slot.
The spacing of an annular slab and an adjacent annular slab is 10～50mm, and the spacing of an outer baffle and an adjacent outer baffle is 10～50mm.
Above-mentioned interior gear cylinder is or/and outer gear cylinder is to be with meshed cylinder, and the shape of mesh is circle or bar shaped, and porosity is 15%～30%.
A dust collection method that uses above-mentioned raw coke oven gas dust arrester, is comprised of following steps:
(1) raw coke oven gas that pyrolysis produces enters eddy flow subgroup cyclone dust collectors by admission line, and solid particle is separated from the gas carry out cyclonic separation in eddy flow subgroup cyclone dust collectors after, gas is discharged through exhaust outlet, and solid particle is discharged through discharging opening;
(2) gas of discharging from eddy flow subgroup cyclone dust collectors enters the air inlet of filter by pipeline, after the media filtration in filter, gas is discharged, coal ash is held back by filtrate, and is taken away by the filtrate flowing, and gas is 0.08～0.35m/m through the gas speed of filter material layer
2.s, the flowing velocity of filtrate is 20～150cm/t, the particle diameter 1～5mm of filtrate;
(3) filtrate enters riser from discharge the bottom of filter, by the hot flue gases of 500～550 ℃, promotes, and the accelerating sections flow velocity of riser is 16～21m/s, and braking section flow velocity is 8～12m/s;
(4) filtrate enters in sedimentation soot blower after riser lifting is heated to 400～550 ℃, the returning charge cone of filtrate in sedimentation soot blower returns to the particles settling chamber that falls into sedimentation soot blower, dusty gas is discharged through the exhaust outlet of particles settling chamber, the gas speed of particles settling chamber is 0.8～2m/s, and the filtrate that falls into particles settling chamber enters the filtrate entrance that enters filter after surge bunker cushions by outlet.
Above-mentioned steps (1) is specifically: it is indoor that the raw coke oven gas that pyrolysis produces enters swirling inlet by admission line, at upper, middle and lower differing heights, with the rightabouts of 180 °, from left air inlet, right air inlet, enter into and in eddy flow, carry out cyclonic separation dedusting, after separation, gas collection is discharged through exhaust outlet in collection chamber, and solid particle enters dust collection chamber through the lower end of eddy flow and discharged by discharging opening;
Above-mentioned steps (2) is specifically: the gas of discharging from the collection chamber of eddy flow subgroup cyclone dust collectors enters the air inlet of filter mixing with the gas of dust collection chamber wireway discharge, in filtering cabin, part of coal ash deposition is taken away with filtrate in the bottom of interior gear cylinder, gas transverse passes filter material layer through the annular space of interior gear cylinder, from the annular space of outer gear cylinder, enter enclosed exhaust plenum, exhaust outlet by enclosed exhaust plenum is discharged, coal ash is held back by filtrate, and is taken away by the filtrate flowing.
Raw coke oven gas dust arrester provided by the invention and method are to have utilized the cyclone dust removal of eddy flow subgroup to be combined with granular bed filter, and further utilize the hot flue gas of riser to promote, filtrate is carried out to fluidisation and blow grey sedimentation separation, and after surge chamber buffering, return to filter and recycle, the present invention removes the coal ash in raw coke oven gas effectively, removal efficiency is high, method of operating is simple, filtrate can also recycle, save processing cost, and device of the present invention is stable, equipment is simple, workable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of embodiment 1.
Fig. 2 is the structural representation of eddy flow subgroup cyclone dust collectors 1 in Fig. 1.
Fig. 3 is that the A-A of Fig. 2 is to view.
Fig. 4 is the structural representation of the filter 2 in Fig. 1.
Fig. 5 is that the B-B of Fig. 4 is to view.
Fig. 6 is the partial enlarged drawing of I in Fig. 4.
Fig. 7 is the partial enlarged drawing of II in Fig. 4.
Fig. 8 is the structural representation of the sedimentation soot blower 4 in Fig. 1.
The specific embodiment
Now in conjunction with the accompanying drawings and embodiments technical scheme of the present invention is further described, but the present invention is not limited only to following embodiment.
Embodiment 1
As shown in Figure 1, the raw coke oven gas dust arrester in the present embodiment is to be connected and formed by eddy flow subgroup cyclone dust collectors 1, filter 2, riser 3, sedimentation soot blower 4 and surge bunker 5.
Gas outlet at eddy flow subgroup cyclone dust collectors 1 is connected with filter 2 by pipeline, the filtrate outlet of filter 2 is by the hot smoke inlet end UNICOM of pipeline and riser 3, the exhanst gas outlet of riser 3 extends in the expansion chamber of sedimentation soot blower 4, the feeding mouth of the discharging opening of sedimentation soot blower 4 and surge bunker 5 is by pipeline UNICOM, and the filtrate entrance of the outlet of surge bunker 5 and filter 2 is by pipeline UNICOM.
Wherein, eddy flow subgroup cyclone dust collectors 1 are by admission line 1-1, collection chamber 1-2, the sub-fixed head 1-3 of eddy flow, swirling inlet chamber 1-4, eddy flow subgroup 1-5, anti-spigot 1-6, wireway 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, admission line 1-1 is installed, admission line 1-1 extends to the 1-4 top, swirling inlet chamber of collection chamber 1-2 below along the central shaft of collection chamber 1-2, on the top of collection chamber 1-2, be processed with exhaust outlet, the sub-fixed head 1-3 of eddy flow of welded top of swirling inlet chamber 1-4, the sub-fixed head 1-3 of eddy flow center is processed with an air inlet, the end of admission line 1-1 extends in air inlet, the air inlet periphery of the sub-fixed head 1-3 of eddy flow is processed with passage, passage is to be distributed on two concentric circles, eddy flow subgroup 1-5 is installed in the 1-4 of swirling inlet chamber, eddy flow subgroup 1-5 is comprised of 24 eddy flow that are distributed on two concentric circles, outer uniform 16, uniform 8 of internal layer, the structure of eddy flow is that the welded top at housing has the escape pipe from enclosure interior extends to housing, tangential direction on the top of housing along sidewall offers left air inlet and right air inlet, left air inlet and right air inlet Central Symmetry on housing, flow to identical, assurance cyclonic separation is effective, the middle part of housing is conical shell, there is discharge nozzle bottom at conical shell.The escape pipe end of each eddy flow extends to the top of the sub-fixed head 1-3 of eddy flow through the passage of the sub-fixed head 1-3 of eddy flow, escape pipe outer wall is welded on the sub-fixed head 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, anti-spigot 1-6 is installed on the discharge nozzle pin of eddy flow.The sub-1-5-2 of eddy flow that is distributed in internal layer from be distributed in the sub-1-5-1 of outer field eddy flow and be staggered on different circumference, the orthographic projection 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 forms equilateral triangle, the air inlet of the sub-1-5-1 of the outer eddy flow of in the vertical direction is higher than the air inlet of eddy flow of internal layer, and the air inlet height of outer field adjacent two eddy flow is different, the height of two eddy flow is separately identical, in, the sub-1-5-1 of outer eddy flow, 1-5-2 air inlet 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 skin is contrary, the centrifugal force of having cancelled out each other and having produced, the 1-8 of dust collection chamber is funnel shaped, discharging opening 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, wireway 1-7 is installed on the sidewall of bossing, gas in the 1-8 of dust collection chamber can be discharged.Raw coke oven gas enters in the 1-4 of swirling inlet chamber from admission line 1-1, from the left air inlet of eddy flow, right air inlet, enter in the housing of eddy flow, carry out cyclonic separation, coal ash is drained in the 1-8 of dust collection chamber and discharged by discharge nozzle, focus on, the gas of separating is drained in collection chamber 1-2 by escape pipe, from the exhaust outlet of collection chamber 1-2, discharge.
After mixing transmission pipeline, the gas that the gas of discharging from the exhaust outlet of eddy flow subgroup cyclone dust collectors 1 is discharged with wireway 1-7 is delivered to filter 2.
Referring to Fig. 4, filter 2 is to be connected and formed by feeding bin 2-1, crooked pipeline 2-2, filtering cabin 2-3, interior gear cylinder 2-4, outer gear cylinder 2-5, filtrate collecting bin 2-6, enclosed exhaust plenum 2-7.
Top at feeding bin 2-1 is processed with charging aperture, quartz sand enters in feeding bin 2-1 from charging aperture, on the sidewall of feeding bin 2-1, be processed with air inlet, air inlet extends to the below of feeding bin 2-1 through the bottom of feeding bin 2-1 by crooked pipeline 2-2, the gas that the gas of discharging from the exhaust outlet of eddy flow subgroup cyclone dust collectors 1 is discharged with wireway 1-7 mixes, by crooked pipeline 2-2, enter filtering cabin 2-3.Referring to Fig. 5, interior gear cylinder 2-4 and outer gear cylinder 2-5 are installed in filtering cabin 2-3, interior gear cylinder 2-4 and outer gear cylinder 2-5 coaxially arrange, the top of interior gear cylinder 2-4 is provided with dividing plate 2-4-4, center at dividing plate 2-4-4 has centre bore, the end of crooked pipeline 2-2 extends to the below of dividing plate 2-4-4 through the centre bore of dividing plate 2-4-4, dividing plate 2-4-4 is welded on crooked pipeline 2-2 outer wall.Referring to Fig. 7, the ash bucket 2-4-3 of 15 annular slab 2-4-1 that interior gear cylinder 2-4 is distributed by venetian blind type and 6 built-in inserted plate 2-4-2 and bottom opening forms, the longitudinal cross-section of each annular slab 2-4-1 is inverted V-shaped, angle α between both sides is 60 °, be that the longitudinal cross-section left side bus of inverted V-shaped annular slab 2-4-1 and the angle between horizontal plane are 60 °, the spacing between upper and lower two adjacent annular slab 2-4-1 is 35mm.6 built-in inserted plate 2-4-2 are evenly distributed on the inner side of annular slab 2-4-1, the upper end of built-in inserted plate 2-4-2 is welded on upper spacer 2-4-4, and sidewall and crooked pipeline 2-2 end outer wall and top board weld together, at the opposite side of each built-in inserted plate 2-4-2, be processed with the slot of 15 inclinations, insert in slot the inner side of inverted V-shaped annular slab 2-4-1, form the interior gear cylinder 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 filtrate collecting bin 2-6, with filtrate collecting bin 2-6 UNICOM, the part coal ash depositing due to the effect of inertia force in gear cylinder 2-4 in collecting.Arranged outside at interior gear cylinder 2-4 is kept off a 2-5 outward, referring to Fig. 6, outer gear cylinder 2-5 top and feeding bin 2-1 UNICOM, the outer baffle 2-5-2 that it is distributed by venetian blind type and outer plate 2-5-1 form, outer baffle 2-5-2 is 15, geometry is laterally inclined circulus, and the angle of inclination beta of the left side bus of its longitudinal cross-section is 120 °, complementary with the inclination angle of left side, the longitudinal cross-section bus of the outer panel of inverted V-shaped annular slab 2-4-1.Outer plate 2-5-1 has 16, periphery along outer baffle 2-5-2 is evenly distributed on circumference, the outer ledge of outer plate 2-5-1 is bolted on the inwall of the enclosed exhaust plenum 2-7 outside outer gear cylinder 2-5, on the inner side edge of outer plate 2-5-1, be processed with skewed slot, the angle of inclination of skewed slot is identical with the angle of inclination of outer baffle 2-5-2, the upper of outer baffle 2-5-2 is fixed on outer plate 2-5-1 along inserting in skewed slot, spacing between outer baffle 2-5-2 and adjacent outer baffle 2-5-2 is 35mm, forms venetian blind type structure.Filtrate collecting bin 2-6 below filtering cabin 2-3 is funnel-shaped structure, filtrate outlet is in the bottom of filtrate collecting bin 2-6, filtrate collecting bin 2-6, outer gear cylinder 2-5 and feeding bin 2-1 UNICOM, the filtrate that charging aperture enters keeps off between cylinder 2-5 and interior gear cylinder 2-4 from feeding bin 2-1 is moved downward to, finally enter in filtrate collecting bin 2-6, after collecting, from filtrate outlet, discharge.Arranged outside at filtering cabin 2-3 and filtrate collecting bin 2-6 has enclosed exhaust plenum 2-7, the gas entering from air inlet spreads in interior gear cylinder 2-4, through the annular space between the annular slab 2-4-1 of interior gear cylinder 2-4, after the quartz sand filtration between interior gear cylinder 2-4 and outer gear cylinder 2-5, gas part enters enclosed exhaust plenum 2-7 through the annular space between the outer baffle 2-5-2 of outer gear cylinder 2-5 again, and the exhaust outlet from enclosed exhaust plenum 2-7 lower end sidewall from enclosed exhaust plenum 2-7 collects of the gas after filtration is discharged.
From the filtrate outlet of filter 2 by the hot smoke inlet end UNICOM of pipeline and riser 3, the hypomere of riser 3 is accelerating sections, and gas speed is 19m/s, and the epimere of riser 3 is braking section, braking section gas speed is 10m/s, and the upper end of riser 3 extends in sedimentation soot blower 4.
Referring to Fig. 8, sedimentation soot blower 4 is common sedimentation soot blower 4 structures, and the top of its housing is particle returning charge cone 4-1, and bottom is particles settling chamber 4-2, and top is exhaust outlet, and discharge gate is arranged at bottom.The upper end exhanst gas outlet of riser 3 is from the bottom of housing through particles settling chamber 4-2, and dusty gas is discharged through the exhaust outlet of expansion chamber, and quartz sand returns and falls into expansion chamber through the indoor returning charge cone 4-1 of particles settling, through discharge gate, by pipeline, discharges.
The discharge gate of sedimentation soot blower 4, by the feeding mouth UNICOM of pipeline and surge bunker 5, is common surge bunkers 5 from surge bunker 5, and the quartz sand that enters surge bunker 5 is delivered to the filtrate entrance of filter 2 by pipeline, recycle.
The method of utilizing above-mentioned raw coke oven gas dust arrester to carry out dedusting is comprised of following steps:
(1) the generation temperature that pyrolysis produces is that the raw coke oven gas that 400～550 ℃, pressure are-5～50KPa enters in the 1-4 of swirling inlet chamber by admission line 1-1, at upper, middle and lower differing heights, with the clockwise direction of 180 °, from left and right air inlet, enter into and in eddy flow, carry out cyclonic separation dedusting, after separation, gas collection is discharged through exhaust outlet in collection chamber 1-2, and solid particle enters the 1-8 of dust collection chamber and discharged by discharging opening through the lower end of eddy flow.
(2) mixing, the gas that the gas of discharging from collection chamber 1-2 is discharged with the 1-8 of dust collection chamber wireway 1-7 enters the filtering cabin 2-3 of filter 2 from the air inlet of filter 2, in filtering cabin 2-3, part of coal ash deposition is taken away with quartz sand in the bottom of interior gear cylinder 2-4, gas transverse passes filter material layer through the annular space of interior gear cylinder 2-4, from the annular space of outer gear cylinder 2-5, enter enclosed exhaust plenum 2-7, exhaust outlet by enclosed exhaust plenum 2-7 is discharged, coal ash is held back by quartz sand, and taken away by the quartz sand flowing, gas is 0.2m/m through the gas speed of filter material layer
2.s, the flowing velocity of quartz sand is 80cm/t, and the particle diameter of quartz sand is 1～5mm;
(3) quartz sand enters riser 3 from discharge the bottom of filter 2, by the hot flue gases of 530 ℃, promotes, and the accelerating sections gas speed of riser 3 is 18m/s, and braking section gas speed is 10m/s;
(4) quartz sand enters in sedimentation soot blower 4 after riser 3 liftings are heated to 530 ℃, returning charge cone 4-1 in sedimentation soot blower 4 returns to the particles settling chamber 4-2 that falls into sedimentation soot blower 4, dusty gas is discharged through the exhaust outlet 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 filter 2 after surge bunker 5 cushions by outlet, further recycle.
Embodiment 2
In above-described embodiment 1, eddy flow subgroup 1-5 in eddy flow subgroup cyclone dust collectors 1 is comprised of 27 eddy flow that are distributed on two concentric circles, outer uniform 18, uniform 9 of internal layer, the structure of eddy flow is that the welded top at housing has the escape pipe from enclosure interior extends to housing, tangential direction on the top of housing along sidewall offers about the centrosymmetric left air inlet of housing and right air inlet, and the bottom of housing is conical shell, in the bottom of conical shell, has discharge nozzle.The escape pipe end of each eddy flow extends to the top of the sub-fixed head 1-3 of eddy flow through the passage of the sub-fixed head 1-3 of eddy flow, escape pipe outer wall is welded on the sub-fixed head 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, anti-spigot 1-6 is installed on the discharge nozzle pin of eddy flow.Be distributed in eddy flow of internal layer and be distributed in outer field eddy flow fork row, the air inlet of the sub-1-5-1 of the outer eddy flow of in the vertical direction is higher than the air inlet of eddy flow of internal layer, and the air inlet height of outer field adjacent two eddy flow is different, the height of two eddy flow is separately identical, the sub-air inlet 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 skin is contrary.Other parts and connecting relation thereof are identical with embodiment 1.
In filter 2, the longitudinal cross-section of each annular slab 2-4-1 is inverted V-shaped, angle α between both sides is 60 °, the inclination angle that is left side, the outer panel longitudinal cross-section bus of inverted V-shaped annular slab 2-4-1 is 45 °, and the spacing between an annular slab 2-4-1 and another annular slab 2-4-1 is 10mm.6 built-in inserted plate 2-4-2 are evenly distributed on the inner side of annular slab 2-4-1, the upper end of built-in inserted plate 2-4-2 is welded on upper spacer 2-4-4, and sidewall and crooked pipeline 2-2 end outer wall weld together, at the opposite side of each built-in inserted plate 2-4-2, be processed with the slot of 20 inclinations, insert in slot the inner side of inverted V-shaped annular slab 2-4-1, form the interior gear cylinder 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 filtrate collecting bin 2-6, with filtrate collecting bin 2-6 UNICOM.Arranged outside at interior gear cylinder 2-4 is kept off a 2-5 outward, outer gear cylinder 2-5 top and feeding bin 2-1 UNICOM, the outer baffle 2-5-2 that it is distributed by venetian blind type and outer plate 2-5-1 form, outer baffle 2-5-2 is 20, geometry is laterally inclined circulus, the angle of inclination beta of the left side bus of its longitudinal cross-section is 105 °, complementary with the inclination angle of the outer panel longitudinal cross-section left side bus of inverted V-shaped annular slab 2-4-1.Outer plate 2-5-1 is 16, periphery along outer baffle 2-5-2 is evenly distributed on circumference, the outer ledge of outer plate 2-5-1 is bolted on the inwall of the enclosed exhaust plenum 2-7 outside outer gear cylinder 2-5, on the inner side edge of outer plate 2-5-1, be processed with skewed slot, the angle of inclination of skewed slot is identical with the angle of inclination of outer baffle 2-5-2, the upper of outer baffle 2-5-2 is fixed on outer plate 2-5-1 along inserting in skewed slot, spacing between outer baffle 2-5-2 and adjacent outer baffle 2-5-2 is 10mm, forms venetian blind type structure.Other parts and connecting relation thereof are identical with embodiment 1.
The structure of riser 3, sedimentation soot blower 4 and surge bunker 5 is identical with embodiment 1, and its connecting relation is identical with embodiment 1.
Utilize above-mentioned raw coke oven gas dust arrester to carry out the method for dedusting identical with embodiment 1.
Embodiment 3
In above-described embodiment 1, eddy flow subgroup 1-5 in eddy flow subgroup cyclone dust collectors 1 is comprised of 30 eddy flow that are distributed on two concentric circles, outer uniform 20, uniform 10 of internal layer, the structure of eddy flow is that the welded top at housing has the escape pipe from enclosure interior extends to housing, tangential direction on the top of housing along sidewall offers about the centrosymmetric left air inlet of housing and right air inlet, and the middle part of housing is conical shell, in the bottom of conical shell, has discharge nozzle.The escape pipe end of each eddy flow extends to the top of the sub-fixed head 1-3 of eddy flow through the passage of the sub-fixed head 1-3 of eddy flow, escape pipe outer wall is welded on the sub-fixed head 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, anti-spigot 1-6 is installed on the discharge nozzle pin of eddy flow.Be distributed in eddy flow of internal layer and be distributed in outer field eddy flow fork row, the air inlet of the sub-1-5-1 of the outer eddy flow of in the vertical direction is higher than the air inlet of eddy flow of internal layer, and the air inlet height of outer field adjacent two eddy flow is different, the height of two eddy flow is separately identical, the sub-air inlet 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 skin is contrary.Other parts and connecting relation thereof are identical with embodiment 1.
In filter 2, the longitudinal cross-section of each annular slab 2-4-1 is inverted V-shaped, angle α between both sides is 60 °, the inclination angle that is left side, the outer panel longitudinal cross-section bus of inverted V-shaped annular slab 2-4-1 is 65 °, and the spacing between an annular slab 2-4-1 and another annular slab 2-4-1 is 50mm.6 built-in inserted plate 2-4-2 are evenly distributed on the inner side of annular slab 2-4-1, the upper end of built-in inserted plate 2-4-2 is welded on upper spacer 2-4-4, and sidewall and crooked pipeline 2-2 end outer wall weld together, at the opposite side of each built-in inserted plate 2-4-2, be processed with the slot of 20 inclinations, insert in slot the inner side of inverted V-shaped annular slab 2-4-1, form the interior gear cylinder 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 filtrate collecting bin 2-6, with filtrate collecting bin 2-6 UNICOM.Arranged outside at interior gear cylinder 2-4 is kept off a 2-5 outward, top and the feeding bin 2-1 UNICOM of outer gear cylinder 2-5, the outer baffle 2-5-2 that it is distributed by venetian blind type and outer plate 2-5-1 form, outer baffle 2-5-2 is 20, geometry is laterally inclined circulus, the angle of inclination beta of the left side bus of its longitudinal cross-section is 125 °, complementary with the inclination angle of the outer panel longitudinal cross-section left side bus of inverted V-shaped annular slab 2-4-1.Outer plate 2-5-1 is 16, periphery along outer baffle 2-5-2 is evenly distributed on circumference, the outer ledge of outer plate 2-5-1 is bolted on the inwall of the enclosed exhaust plenum 2-7 outside outer gear cylinder 2-5, on the inner side edge of outer plate 2-5-1, be processed with skewed slot, the angle of inclination of skewed slot is identical with the angle of inclination of outer baffle 2-5-2, the upper of outer baffle 2-5-2 is fixed on outer plate 2-5-1 along inserting in skewed slot, spacing between outer baffle 2-5-2 and adjacent outer baffle 2-5-2 is 50mm, forms venetian blind type structure.Other parts and connecting relation thereof are identical with embodiment 1.
The structure of riser 3, sedimentation soot blower 4 and surge bunker 5 is identical with embodiment 1, and its connecting relation is identical with embodiment 1.
Utilize above-mentioned raw coke oven gas dust arrester to carry out the method for dedusting identical with embodiment 1.
Embodiment 4
In the present embodiment, interior gear cylinder 2-4 is that by sidewall, to have aperture be that cylindrical body and the infundibulate ash bucket 2-4-3 of the circular mesh of 3mm forms, and the porosity of cylindrical body is 22%, and the top of interior gear cylinder 2-4 is separated with feeding bin 2-1 by dividing plate 2-4-4.An outer gear cylinder 2-5 is that sidewall has the cylindrical body that 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 dust collection method, the particle diameter of quartz sand should be greater than the aperture of outer gear cylinder 2-5 and interior gear cylinder 2-4, and other step is identical with embodiment 1.
Embodiment 5
In the present embodiment, interior gear cylinder 2-4 is had cylindrical body and the infundibulate ash bucket 2-4-3 formation of the bar shaped mesh of 3 * 5mm by sidewall, and the porosity of cylindrical body is 15%, and the top of interior gear cylinder 2-4 is separated with feeding bin 2-1 by dividing plate 2-4-4.An outer gear cylinder 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 dust collection method, the particle diameter of quartz sand should be greater than the aperture of outer gear cylinder 2-5 and interior gear cylinder 2-4, and other step is identical with embodiment 1.
Embodiment 6
In the present embodiment, interior gear cylinder 2-4 is had cylindrical body and the infundibulate ash bucket 2-4-3 formation of the bar shaped mesh of 3 * 5mm by sidewall, and the porosity of cylindrical body is 30%, and the top of interior gear cylinder 2-4 is separated with feeding bin 2-1 by dividing plate 2-4-4.An outer gear cylinder 2-5 is that sidewall has the cylindrical body that 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 dust collection method, the particle diameter of quartz sand should be greater than the aperture of outer gear cylinder 2-5 and interior gear cylinder 2-4, and other step is identical with embodiment 1.
Embodiment 7
In the step of the dust collection method of above-described embodiment 1～6 (2), mixing, the gas that the gas of discharging from collection chamber 1-2 is discharged with the 1-8 of dust collection chamber wireway 1-7 enters the filtering cabin 2-3 of filter 2 from the air inlet of filter 2, in filtering cabin 2-3, part of coal ash deposition is taken away with quartz sand in the bottom of interior gear cylinder 2-4, gas transverse passes filter material layer through the annular space of interior gear cylinder 2-4, from the annular space of outer gear cylinder 2-5, enter enclosed exhaust plenum 2-7, exhaust outlet by enclosed exhaust plenum 2-7 is discharged, coal ash is held back by quartz sand, and taken away by the quartz sand flowing, gas is 0.08m/m through the gas speed of filter material layer
2.s, the flowing velocity of quartz sand is 20cm/t, the granularity 1～5mm of quartz sand.In step (3), filtrate enters riser 3 from discharge the bottom of filter 2, by the hot flue gases of 500 ℃, promotes, and the accelerating sections gas speed of riser 3 is 16m/s, and braking section gas speed is 8m/s.In step (4), filtrate enters in sedimentation soot blower 4 after riser 3 liftings are heated to 500 ℃, the returning charge cone of filtrate in sedimentation soot blower 4 returns to the particles settling chamber 4-2 that falls into sedimentation soot blower 4, dusty gas is discharged through the exhaust outlet 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 filter 2 after surge bunker 5 cushions by outlet.Other step is identical with corresponding embodiment.
Embodiment 8
In the step of the dust collection method of above-described embodiment 1～6 (2), mixing, the gas that the gas of discharging from collection chamber 1-2 is discharged with the 1-8 of dust collection chamber wireway 1-7 enters the filtering cabin 2-3 of filter 2 from the air inlet of filter 2, in filtering cabin 2-3, part of coal ash deposition is taken away with quartz sand in the bottom of interior gear cylinder 2-4, gas transverse passes filter material layer through the annular space of interior gear cylinder 2-4, from the annular space of outer gear cylinder 2-5, enter enclosed exhaust plenum 2-7, exhaust outlet by enclosed exhaust plenum 2-7 is discharged, coal ash is held back by quartz sand, and taken away by the quartz sand flowing, gas is 0.35m/m through the gas speed of filter material layer
2.s, the flowing velocity of quartz sand is 150cm/t, the granularity 1～5mm of quartz sand.In step (3), filtrate enters riser 3 from discharge the bottom of filter 2, by the hot flue gases of 550 ℃, promotes, and the accelerating sections gas speed of riser 3 is 21m/s, and braking section gas speed is 12m/s.In step (4), filtrate enters in sedimentation soot blower 4 after riser 3 liftings are heated to 550 ℃, the returning charge cone of filtrate in sedimentation soot blower 4 returns to the particles settling chamber 4-2 that falls into sedimentation soot blower 4, dusty gas is discharged through the exhaust outlet 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 filter 2 after surge bunker 5 cushions by outlet.Other step is identical with corresponding embodiment.
Embodiment 9
At the dust collection method of above-described embodiment 1～8, in step (2), filtrate quartz sand used can be replaced with other filtrates such as waiting the olivine of particle diameter or alundum (Al2O3), and other step is identical with corresponding embodiment.
Claims (9)
1. a raw coke oven gas dust arrester, it is characterized in that: the gas outlet at eddy flow subgroup cyclone dust collectors (1) is connected with filter (2) by pipeline, the filtrate outlet of filter (2) is by the hot smoke inlet end UNICOM of pipeline and riser (3), the exhanst gas outlet of riser (3) extends in the expansion chamber of sedimentation soot blower (4), the discharging opening of sedimentation soot blower (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 pipe-and-filter (2);
Above-mentioned eddy flow subgroup cyclone dust collectors (1) are: at the top of collection chamber (1-2), be provided with admission line (1-1), admission line (1-1) extends to the top of swirling inlet chamber (1-4) along the central shaft of collection chamber (1-2), on the sidewall of collection chamber (1-2), be provided with exhaust outlet, on the top of swirling inlet chamber (1-4), be provided with the sub-fixed head of eddy flow (1-3), inner chamber is provided with eddy flow subgroup (1-5), center at the sub-fixed head of eddy flow (1-3) is processed with air inlet, admission line (1-1) extends in air inlet, outside at air inlet is processed with passage, the blast pipe of eddy flow subgroup (1-5) extends to the top of the sub-fixed head of eddy flow (1-3) through passage, eddy flow subgroup (1-5) forms by being distributed in two eddy flow in concentric circumference, on skin, the air inlet height of adjacent two eddy flow is different, the sub-air inlet height of two eddy flows is separately identical, the air inlet of eddy flow of in the vertical direction internal layer is lower than the air inlet of outer field eddy flow, and outer field eddy flow is staggered on different circumference from eddy flow of internal layer, on same layer, eddy flow is contrary with the airintake direction of adjacent eddy flow, on the discharge nozzle of each eddy flow, be provided with anti-spigot (1-6), the lower end of each eddy flow extends to the top of dust collection chamber (1-8), on the top sidewall of dust collection chamber (1-8), be provided with wireway (1-7), the discharging opening of dust collection chamber (1-8) is arranged on bottom.
2. raw coke oven gas dust arrester according to claim 1, it is characterized in that described eddy flow is: the top at housing is provided with escape pipe, housing top processes along sidewall tangential direction about the centrosymmetric left air inlet of housing and right air inlet, the middle part of housing is conical shell, and the bottom of conical shell is provided with discharge nozzle.
3. raw coke oven gas dust arrester according to claim 1, 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), the interlayer on skin between eddy flow and adjacent eddy flow is divided into 100～200mm.
4. raw coke oven gas dust arrester according to claim 1, it is characterized in that described filter (2) is: at feeding bin (2-1) top, be processed with charging aperture, crooked pipeline (2-2) through feeding bin (2-1) bottom is set on sidewall, filtering cabin (2-3) is arranged on the below of feeding bin (2-1), interior gear cylinder (2-4) and outer gear cylinder (2-5) are coaxially set in filtering cabin (2-3), interior gear cylinder (2-4) is arranged on the outside of crooked pipeline (2-2), top is separated with feeding bin (2-1) by dividing plate (2-4-4), the end of crooked pipeline (2-2) extends to dividing plate (2-4-4) below through opening in the hole at dividing plate (2-4-4) center, top and feeding bin (2-1) UNICOM of outer gear cylinder (2-5), the bottom of outer gear cylinder (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), on the lower end sidewall of enclosed exhaust plenum (2-7), be processed with exhaust outlet.
5. raw coke oven gas dust arrester according to claim 4, it is characterized in that: described interior gear cylinder (2-4) is the annular slab (2-4-1) being distributed by venetian blind type, the ash bucket (2-4-3) of at least two built-in inserted plates (2-4-2) and bottom opening forms, the below that ash bucket (2-4-3) is arranged on annular slab (2-4-1) extends in filtrate collecting bin (2-6) and filtrate collecting bin (2-6) UNICOM, the longitudinal cross-section of each annular slab (2-4-1) is inverted V-shaped, the upper end of built-in inserted plate (2-4-2) is fixed on upper spacer (2-4-4), on built-in inserted plate (2-4-2), be provided with the slot of inclination, one side of annular slab (2-4-1) is inserted in slot, angle α between the biside plate of annular slab (2-4-1) is 60 °, the inclination angle of the left side bus of its longitudinal cross-section of annular slab (2-4-1) is 45 °～65 °,
The outer baffle (2-5-2) that described outer gear cylinder (2-5) is distributed by venetian blind type forms with outer plate (2-5-1), 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), on opposite side, be provided with the skewed slot identical with the inclination angle of outer baffle (2-5-2), outer baffle (2-5-2) inserts in skewed slot.
6. raw coke oven gas dust arrester according to claim 5, it is characterized in that: an annular slab (2-4-1) is 10～50mm with the spacing of an adjacent annular slab (2-4-1), an outer baffle (2-5-2) is 10～50mm with the spacing of an adjacent outer baffle (2-5-2).
7. raw coke oven gas dust arrester according to claim 4, is characterized in that: described interior gear cylinder (2-4) is or/and outer gear cylinder (2-5) is with meshed cylinder, and the shape of mesh is circle or bar shaped, and porosity is 15%～30%.
8. right to use requires a dust collection method for 1 raw coke oven gas dust arrester, it is characterized in that being comprised of following steps:
(1) raw coke oven gas that pyrolysis produces enters in the swirling inlet chamber (1-4) of eddy flow subgroup cyclone dust collectors (1) by admission line (1-1), at upper, middle and lower differing heights, with the rightabouts of 180 °, from left air inlet, right air inlet, enter into and in eddy flow, carry out cyclonic separation dedusting, after separation, gas collection is discharged through exhaust outlet in collection chamber (1-2), and solid particle enters dust collection chamber (1-8) and discharged by discharging opening through the lower end of eddy flow;
(2) gas of discharging from eddy flow subgroup cyclone dust collectors (1) enters the air inlet of filter (2) by pipeline, after the media filtration in filter (2), gas is discharged, coal ash is held back by filtrate, and taken away by the filtrate flowing, gas is 0.08～0.35m/m through the gas speed of filter material layer
2.s, the flowing velocity of filtrate is 20～150cm/t, the particle diameter 1～5mm of filtrate;
(3) filtrate enters riser (3) from discharge the bottom of filter (2), by the hot flue gases of 500～550 ℃, promotes, and the accelerating sections flow velocity of riser (3) is 16～21m/s, and braking section flow velocity is 8～12m/s;
(4) filtrate enters in sedimentation soot blower (4) after riser (3) lifting is heated to 400～550 ℃, the returning charge cone (4-1) of filtrate in sedimentation soot blower (4) returns to the particles settling chamber (4-2) that falls into sedimentation soot blower (4), dusty gas is discharged through the exhaust outlet 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 filter (2) after surge bunker (5) cushions by outlet.
9. raw coke oven gas dust collection method according to claim 8, it is characterized in that described step (1) specifically: above-mentioned steps (2) specifically: the gas of discharging from the collection chamber (1-2) of eddy flow subgroup cyclone dust collectors (1) enters the air inlet of filter (2) mixing with the gas of dust collection chamber (1-8) wireway (1-7) discharge, in filtering cabin (2-3), part of coal ash deposition is taken away with filtrate in the bottom of interior gear cylinder (2-4), gas transverse passes filter material layer through the annular space of interior gear cylinder (2-4), from the annular space of outer gear cylinder (2-5), enter enclosed exhaust plenum (2-7), exhaust outlet by enclosed exhaust plenum (2-7) is discharged, coal ash is held back by filtrate, and taken away by the filtrate flowing.
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| CN104449782B (en) * | 2014-11-07 | 2017-05-03 | 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 |
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