CN1214847C - Rotary type fluidized bed back blow particle layer dust removing apparatus - Google Patents
Rotary type fluidized bed back blow particle layer dust removing apparatus Download PDFInfo
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- CN1214847C CN1214847C CN 03132195 CN03132195A CN1214847C CN 1214847 C CN1214847 C CN 1214847C CN 03132195 CN03132195 CN 03132195 CN 03132195 A CN03132195 A CN 03132195A CN 1214847 C CN1214847 C CN 1214847C
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Abstract
The present invention relates to an industrial gas dust removal technology. A granular layer dust removal technology, a fluidized bed back-blowing ash removal technology and a rotary mechanism are adopted to realize the continuous dust removal and continuous ash removal of a dust remover. The present invention is characterized in that a rotary type fluidized bed back-blowing mechanism composed of an exhaust air suction cover and a rotary exhaust pipe is arranged; the rotary type fluidized bed back-blowing mechanism takes the circle center of the cylindrical granular layer dust remover as a center to rotate; the exhaust air suction cover is arranged in an air intake cover at the upper part of the granular layer dust remover. Back-blowing airflow passes through the fluidized bed back-blowing mechanism from top to bottom so as to fluidize granules in an ash removal region. Dust is taken out of the dust remover by the back-blowing airflow because of small grain diameter, and is collected outside the dust remover. Because the flow quantity of the back-blowing airflow is small, the dust is easily collected outside the dust remover. The rotary operation of the fluidized bed back-blowing mechanism can simultaneously ensure that the ash removal and the dust removal are continuously carried out. The fluidized bed back-blowing mechanism has the advantages of reliable operation, little investment and low operation cost.
Description
Affiliated technical field
Patent of the present invention relates to the technology of industry gas dust removing, refers in particular to a kind of rotary fluidized bed blowback gravel bed filter.
Background technology
The industry gas dust removing method has a lot, and single tube cyclone dust collectors, multicyclone, cyclonic water film deduster, cloth bag filter collector, electrostatic precipitator and gravel bed filter etc. are arranged, and also can be divided into low temperature dedusting and high-temperature dust removal.The deduster of whirlwind form, because of simple in structure, the dustiness of gas can not meet the demands in some occasion after the dedusting; In the high-temperature dust removal occasion, adopt electric cleaner or sack cleaner, gas must be cooled to～and 150 ℃, can adopt the blending cold air or, increase power consumption like this with the cooler cooling, in addition, deduster or sack cleaner investment are higher than 4～6 times of gravel bed filters, the system process complexity, and maintenance is frequent, run into be corrosive gas or gas humidity height, shorten equipment life greatly.Therefore sack cleaner and electrostatic precipitator can not adapt to high-temperature dust removal.
For high-temperature flue gas, gravel bed filter has remarkable advantages.It is simple in structure, and is anticorrosion, can be competent at high temperature, satisfies emission request, and equipment investment, operating cost are lower.Existing gravel bed filter has two kinds of situations, and a kind of is the gravel bed filter of fluid bed reverse gas cleaning, the work of stratum granulosum gap, and backflowing gas amount is big, inconvenient operation; Another kind is the moving granular bed filter collector, dedusting in the stratum granulosum moving process, and stratum granulosum sieves deashing then, because stratum granulosum is mobile, the gap increases between the particle, and efficiency of dust collection descends, in addition, after the screening, particle returns the requirement height of stratum granulosum, has influenced the popularization of this technology.
Summary of the invention
The purpose of this invention is to provide a kind of rotary fluidized bed blowback gravel bed filter that is used for dry method dust, it is easy to operate, and is reliable, the efficiency of dust collection height.
Rotary fluidized bed blowback gravel bed filter has adopted stratum granulosum dedusting technology, fluid bed reverse gas cleaning technology and rotating mechanism, realizes the continuous dedusting of deduster, continuous deashing.
The technical scheme that realizes above-mentioned purpose is:
It comprises the cylinder type gravel bed filter, be positioned at the dusty gas inlet wind cover on cylinder type gravel bed filter top, be positioned at blowback air exhaust suspended hood, the rotation blast pipe of inlet wind cover; With gas vent fan housing, rotation purge gas inlet tube, rotation purge gas air inlet air compartment after the purification that is positioned at cylinder type gravel bed filter bottom; The cylinder type gravel bed filter is made up of the packing layer cell, and filler is arranged in the cell; Rotation purge gas inlet tube, rotation purge gas air inlet air compartment, exhaust suspended hood and rotation blast pipe constitute fluid bed blowback mechanism jointly; It is characterized in that: the cylinder type gravel bed filter is rotated as rotor, with respect to inlet wind cover, outlet fan housing and the fluid bed blowback mechanism as stator; The cross section of cylinder type gravel bed filter is divided into three parts: dust-contained airflow dedusting zone, fluid bed reverse gas cleaning zone and seal isolation zone, wherein dusty gas enters the dedusting zone of cylinder type gravel bed filter, the packing layer cell in the described zone of flowing through through inlet wind cover, through wherein filler purification, the gas vent fan housing is discharged after purifying; Purge gas by rotation purge gas inlet tube enter, through the deashing zone fluidisation deashing of rotation purge gas air inlet air compartment to the cylinder type gravel bed filter, discharge through exhaust suspended hood, rotation blast pipe.
It is motionless as stator that technique scheme also can be set to the cylinder type gravel bed filter, and inlet wind cover, outlet fan housing and fluid bed blowback mechanism form one, are rotated as rotor; The cross section of cylinder type gravel bed filter is divided into three parts: dust-contained airflow dedusting zone, fluid bed reverse gas cleaning zone and seal isolation zone, wherein dusty gas enters the dedusting zone of cylinder type gravel bed filter, the packing layer cell in the described zone of flowing through through inlet wind cover, through wherein filler purification, the gas vent fan housing is discharged after purifying; Purge gas by rotation purge gas inlet tube enter, through the deashing zone fluidisation deashing of rotation purge gas air inlet air compartment to the cylinder type gravel bed filter, discharge through exhaust suspended hood, rotation blast pipe.Owing to advance, arrange the blowback air device and rotate synchronously, help the blowback air-flow and be brought to deduster, improve the purge gas dust-collecting efficiency.
According to relative motion principle, said apparatus comprises following two kinds of situations: 1. gravel bed filter is motionless as stator, inlet, outlet fan housing and fluid bed blowback mechanism form one, be rotated as rotor, in rotary course, fluidisation blowback mechanism carries out the fluidisation deashing to the stratum granulosum of this position, and other stratum granulosum carries out dedusting work, rotor turns over a circle, finishes once the deashing to stratum granulosum.2. gravel bed filter is rotated as rotor, it is motionless as stator that inlet, outlet fan housing and fluid bed blowback mechanism form one, in the rotary course of gravel bed filter, fluidisation blowback mechanism carries out the fluidisation deashing to the stratum granulosum of this position, the stratum granulosum of other position carries out dedusting work, gravel bed filter turns over a circle, finishes once the deashing to stratum granulosum.
The course of work of the present invention is as follows:
Dust-contained airflow enters gravel bed filter, and in the dedusting zone, gas passes through from intergranular gap, because the effect of each effect such as diffusion, interception, inertia and gravity, dust is stayed in the stratum granulosum, reaches the dedusting purpose; The dust that stays in the stratum granulosum is more and more, and the resistance that deduster filters is increasing, and when setting value, stratum granulosum needs reverse gas cleaning to resistance greatly.
The blowback air-flow by fluid bed blowback mechanism, makes the grain fluidized of deashing zone from bottom to top, and dust is taken to outside the deduster by the blowback air-flow because particle diameter is little, collects outside deduster, because the purge gas flow is little, collects outside deduster easily; The rotary manipulation of fluidisation blowback mechanism can guarantee simultaneously that deashing, dedusting place of working carry out continuously, and the ash amount that deposits in the stratum granulosum remains unchanged substantially, and then the resistance of deduster remains unchanged substantially.As gas dust content height, the speed of stratum granulosum deposition ash is fast, and dust remover resistance increases very fast, at this moment can improve the rotary speed of fluid bed reverse gas cleaning mechanism, and the deposition dust is in time removed.
The present invention is mainly used in high-temperature dust removal, as flue gas ash removal in flue gas ash removal, coke oven coal flue gas ash removal and the coal-fired combined cycle generation such as IGCC and PFBC-CC of the flue gas ash removal of steel rolling coal dust heating furnace, furnace cupola etc.Can be used for removing the harmful components in the gas, as containing H in the gas
2S or SO
2, can in gas, spray into the adsorbent (as active carbon) of certain particle size, after the absorption harmful components, be deposited in the stratum granulosum with dust, in deashing process, taken to outside the deduster by the blowback air-flow, isolate adsorbent by screening, can reuse behind some adsorbent reactivation.
Stratum granulosum generally adopts yellow sand, quartz sand, haydite etc., stratum granulosum thickness 100～300mm, particle diameter 1～3mm.
Advantage of the present invention is:
(1) dust-removing element such as stratum granulosum particle, housing, rotating mechanism etc. all can bear high temperature, and therefore, gravel bed filter can bear high temperature;
(2) owing to adopt the dedusting method of fluid bed form, its efficient is higher than the moving bed gravel bed filter;
(3) adopt zonule fluid bed deashing, ash-clearing structure is simple than other gravel bed filter, and purge gas gathers dust easily;
(4) adopt rotating mechanism, deashing, dedusting can be carried out continuously.
(5) reliable, the small investment of the present invention, operating cost are low.
Description of drawings
Fig. 1. structural representation of the present invention
Fig. 2. cross section of the present invention working range construction schematic diagram
Fig. 3. process flow diagram of the present invention
1. dusty gas inlet wind cover 2. cylinder type gravel bed filters 3. packing layer cells 4. fillers 5. purify back gas vent fan housing 6. rotation purge gas inlet tubes 7. rotation purge gas air inlet air compartments 8. exhaust suspended hoods 9. rotation blast pipes 10. filtering areas 11. seal areas 12. blowback districts 13. filler sashes, 14. air-introduced machines, 15. rotary fluidized bed blowback gravel bed filter 16. external deduster 17. air-introduced machines
The specific embodiment
The embodiment of the invention as shown in Figure 1, it comprise the dusty gas inlet wind cover 1 that is positioned at deduster top, cylinder type gravel bed filter 2, deduster packing layer cell 3 and filler 4, purify back gas vent fan housing 5, and the rotary fluidized bed blowback mechanism that forms by exhaust suspended hood 8, rotation blast pipe 9, its center of circle with cylinder type gravel bed filter 2 is the center rotation, and exhaust suspended hood 8 is located in the inlet wind cover 1 on gravel bed filter top.
As shown in Figure 2, the cross section of cylinder type gravel bed filter is divided into three parts: dust-contained airflow dedusting zone 10, fluid bed reverse gas cleaning zone 12 and seal isolation zone 11, each zone is made up of some filler sashes 13.
The present invention is used for boiler smoke dust collecting process flow chart as shown in Figure 3.Stratum granulosum thickness in the gravel bed filter, the size of particle, selection are determined according to the characteristics of institute's dedusting gas and the environment protection emission concentration of requirement.Under air-introduced machine (14) effect, ash-laden gas enters gravel bed filter (15), after the stratum granulosum dedusting, purifying flue gas discharges from the outlet of deduster, through air-introduced machine (14) emptying,, can before air-introduced machine, add cooler if flue-gas temperature exceeds the air-introduced machine operating temperature range; Purge gas is sent in the deduster, position in rotating fluidized bed blowback mechanism, the fluidized particles layer, simultaneously the dust that deposits in the stratum granulosum is taken to outside the deduster, separate through external deduster (16), purge gas is at last by air-introduced machine (17) (when gas temperature was high, gas need cool off before the air-introduced machine) emptying.
The basic parameter of present embodiment and implementation result:
Stratum granulosum thickness 100mm, the quartz sand of employing particle diameter 1～2mm, the rate of filtration 0.3～0.4m/s, dust remover resistance～1200Pa, gas concentration of emission 50～80mg/Nm after the dedusting
3As about 380 ℃ of steel rolling coal dust flue gas of heating furnace temperature, dust concentration is greater than 10000mg/m
3, select the rate of filtration dedusting of 0.4m/s for use after, the concentration of emission of flue gas is lower than 60mg/m
3
Stratum granulosum thickness 200mm, particle diameter 1～2mm, quartz sand, the rate of filtration 0.3～0.4m/s, dust remover resistance～1600Pa, gas concentration of emission 5～30mg/Nm after the dedusting
3As about 380 ℃ of steel rolling coal dust flue gas of heating furnace temperature, dust concentration is greater than 10000mg/m
3, select the rate of filtration dedusting of 0.35m/s for use after, the concentration of emission of flue gas is lower than 20mg/m
3
Claims (2)
1. rotary fluidized bed blowback gravel bed filter comprises cylinder type gravel bed filter (2), is positioned at the dusty gas inlet wind cover (1) on cylinder type gravel bed filter (2) top, the blowback air exhaust suspended hood (8) that is positioned at inlet wind cover (1), rotation blast pipe (9); With gas vent fan housing (5), rotation purge gas inlet tube (6), rotation purge gas air inlet air compartment (7) after the purification that is positioned at cylinder type gravel bed filter (2) bottom; Cylinder type gravel bed filter (2) is made up of packing layer cell (3), and filler is arranged in the cell; Rotation purge gas inlet tube (6), rotation purge gas air inlet air compartment (7), exhaust suspended hood (8) and rotation blast pipe (9) constitute fluid bed blowback mechanism jointly; It is characterized in that: cylinder type gravel bed filter (2) is rotated as rotor, with respect to inlet wind cover (1), outlet fan housing (5) and the fluid bed blowback mechanism as stator; The cross section of cylinder type gravel bed filter (2) is divided into three parts: dust-contained airflow dedusting zone (10), fluid bed reverse gas cleaning zone (12) and seal isolation zone (11), wherein dusty gas enters the dedusting zone (10) of cylinder type gravel bed filter (2), the packing layer cell (3) in the described zone of flowing through through inlet wind cover (1), through wherein filler (4) purification, gas vent fan housing (5) is discharged after purifying; Purge gas by rotation purge gas inlet tube (6) enter, through rotation purge gas air inlet air compartment (7) to the deashing of cylinder type gravel bed filter (2) zone fluidisation deashing, discharge through exhaust suspended hood (8), rotation blast pipe (9).
2. rotary fluidized bed blowback gravel bed filter comprises cylinder type gravel bed filter (2), is positioned at the dusty gas inlet wind cover (1) on cylinder type gravel bed filter (2) top, the blowback air exhaust suspended hood (8) that is positioned at inlet wind cover (1), rotation blast pipe (9); With gas vent fan housing (5), rotation purge gas inlet tube (6), rotation purge gas air inlet air compartment (7) after the purification that is positioned at cylinder type gravel bed filter (2) bottom; Cylinder type gravel bed filter (2) is made up of packing layer cell (3), and filler is arranged in the cell; Rotation purge gas inlet tube (6), rotation purge gas air inlet air compartment (7), exhaust suspended hood (8) and rotation blast pipe (9) constitute fluid bed blowback mechanism jointly; It is characterized in that: cylinder type gravel bed filter (2) is motionless as stator, and inlet wind cover (1), outlet fan housing (5) and fluid bed blowback mechanism form one, are rotated as rotor; The cross section of cylinder type gravel bed filter (2) is divided into three parts: dust-contained airflow dedusting zone (10), fluid bed reverse gas cleaning zone (12) and seal isolation zone (11), wherein dusty gas enters the dedusting zone (10) of cylinder type gravel bed filter (2), the packing layer cell (3) in the described zone of flowing through through inlet wind cover (1), through wherein filler (4) purification, gas vent fan housing (5) is discharged after purifying; Purge gas by rotation purge gas inlet tube (6) enter, through rotation purge gas air inlet air compartment (7) to the deashing of cylinder type gravel bed filter (2) zone fluidisation deashing, discharge through exhaust suspended hood (8), rotation blast pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03132195 CN1214847C (en) | 2003-07-08 | 2003-07-08 | Rotary type fluidized bed back blow particle layer dust removing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03132195 CN1214847C (en) | 2003-07-08 | 2003-07-08 | Rotary type fluidized bed back blow particle layer dust removing apparatus |
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| Publication Number | Publication Date |
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| CN1475295A CN1475295A (en) | 2004-02-18 |
| CN1214847C true CN1214847C (en) | 2005-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03132195 Expired - Fee Related CN1214847C (en) | 2003-07-08 | 2003-07-08 | Rotary type fluidized bed back blow particle layer dust removing apparatus |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364641C (en) * | 2006-01-05 | 2008-01-30 | 宁波大学 | Granular gas purifier |
| CN102078732A (en) * | 2009-11-26 | 2011-06-01 | 刘柏谦 | Irregular multi-size uniform fluctuation grain bed |
| CN104524893A (en) * | 2014-12-15 | 2015-04-22 | 成都昊特新能源技术股份有限公司 | Process for carrying out combined dust removal on tar-containing flue gas by utilizing dust remover of particle layer of flowing bed and flat-plate membrane filter |
| CN107412967B (en) * | 2017-04-28 | 2020-06-23 | 江山市科力消防设备有限公司 | Canister assembly of fire-fighting self-rescue respirator |
| CN107569790B (en) * | 2017-09-07 | 2020-06-23 | 江山市科力消防设备有限公司 | Canister with filtering membrane |
| CN108310865A (en) * | 2018-01-15 | 2018-07-24 | 孙增娟 | A kind of coalman's station-service has the deduster of sulfur limitation effect |
| CN114288776B (en) * | 2021-12-17 | 2022-09-13 | 西安交通大学 | Device for continuously purifying high-temperature dust-containing gas by using dynamic ceramic membrane |
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2003
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| CN1475295A (en) | 2004-02-18 |
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