CN202683484U - Screening system for screening catalytic agents of Fischer-Tropsch synthesis - Google Patents
Screening system for screening catalytic agents of Fischer-Tropsch synthesis Download PDFInfo
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- CN202683484U CN202683484U CN 201220091166 CN201220091166U CN202683484U CN 202683484 U CN202683484 U CN 202683484U CN 201220091166 CN201220091166 CN 201220091166 CN 201220091166 U CN201220091166 U CN 201220091166U CN 202683484 U CN202683484 U CN 202683484U
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Abstract
The utility model discloses a screening system for screening catalytic agents of Fischer-Tropsch synthesis. The screening system comprises a catalytic agent conveying and dispersing device (1), a dispersing tower (2), an air leading tube (9), a product collecting barrel (10), a settling chamber (3), and a cyclone separator (4). The catalytic agent conveying and dispersing device (1) comprises a catalytic agent charging barrel (18) and a disperser (15). The dispersing tower (2) is provided with an upper space and a lower space, and the disperser (15) is arranged in the upper space. The air leading tube (9) is inserted in the lower space of the dispersing tower (2) in the direction vertical to the central line of the dispersing tower (2). The product collecting barrel (10) is located below the dispersing tower (2), and is connected to the bottom of the dispersing tower (2) through an extension tube. The settling chamber (3) is provided with an inlet (31), a first outlet (32) and a second outlet (33), the inlet (31) of the settling chamber (3) is connected with the air leading tube (9), and the first outlet (32) of the settling chamber (3) is connected to the product collecting barrel (10). The cyclone separator (4) is provided with an inlet (41), and the inlet (41) of the cyclone separator (4) is connected with the second outlet (33) of the settling chamber (3).
Description
Technical field
The utility model belongs to the production technical field for the synthetic catalyst of Fischer-Tropsch, and particularly, the utility model relates to a kind of screening system that sieves the synthetic catalyst of Fischer-Tropsch.
Background technology
Fischer-Tropsch is synthetic to be with CO, H
2Be the effective way that main synthesis gas is converted into chemical raw material and liquid hydrocarbon product, wherein precipitated iron catalyst is suitable for being applied in the synthetic source of the gas than low hydrogen-carbon ratio take coal as the source because of its characteristic that Water gas shift/WGS is arranged; Rich coal resources in China, so precipitated iron catalyst has obtained more research and application.The synthetic strong exothermal reaction that belongs to of Fischer-Tropsch will improve production capacity with scaling-up, must solve the heat release heat transfer problem; Slurry attitude bed belongs to the gas-liquid-solid three-phase system, and gas phase is upwards passed through from reactor bottom, and continuously disturbance liquid phase and solid phase when realizing Fischer-Tropsch synthesis, are disperseed and transmitted heat, can better realization response temperature control.But the problem that slurry attitude bed need to solve is, must the liquid wax that generate be extracted out by the filtration means, to keep the reactor liquid level, the catalyst that filters out must be turned back in the reactor again simultaneously, so filtration problem becomes a maximum difficult point of operation slurry reactor system.In the situation that do not consider filtration system and catalyst strength, must guarantee at first that the contained fine powder amount of the first catalyst that fills or upgrade is as far as possible few, from the load of source reduction filtration system, the long period steady running of ability implement device.
The forming method that is adapted to the synthetic precipitated iron catalyst of syrup state bed Fischer Tropsch is generally the spray drying process moulding, after the spray-drying condition has been optimized in adjustment, obtain qualified products particle diameter yield maximum can be more than 80-90%, but also still have the product about 10～20% can be less than desired product cut size scope, the product of institute's drying and moulding also need carry out roasting simultaneously, product can produce because of the decomposition of dehydration and compound certain contraction and fragmentation in the roasting process, so that the product of small particle diameter scope further enlarges, this part product is as processing without screening, in the Fischer-Tropsch synthesis process, can aggravate to stop up the probability of filtration system, production operation is brought harmful effect.Therefore must after the catalyst roasting, once sieve again, substandard particularly subparticle catalyst is sieved out product.At present, in the material sieving technology of catalyst, generally adopt vibrating sieving machine to sieve, the vibrating sieving machine operation is comparatively loaded down with trivial details, and the easy blocking screen mesh eyes of fine powder needs often to change or the blowback screen cloth, production efficiency is extremely low, labour intensity is large, and on-the-spot dust pollution is serious, and catalyst might be broken by vibration-extrusion in the process of vibrosieve.Because screening efficiency is low, can have a strong impact on the production capacity of catalyst manufacturer simultaneously, sieve unit has become the short slab of whole fischer-tropsch catalysts production process at present, must address this problem.
The utility model content
The purpose of this utility model is the deficiency for existing catalyst material sieving technology, provide a kind of and can not destroy the catalyst form, can not form dust pollution, convenient operation, the catalyst screening method during that convenience is regulated, efficient is high and the screening system that sieves the synthetic catalyst of Fischer-Tropsch.
In one aspect, the utility model provides a kind of screening system that sieves the synthetic catalyst of Fischer-Tropsch, it is characterized in that, described screening system comprises:
-catalyst transport and dispersal device, described catalyst transport and dispersal device comprise catalyst charge bucket and disperser;
-scattered tower, described scattered tower has upper space and lower space, and the described disperser of described catalyst transport and dispersal device is arranged in the described upper space of described scattered tower;
-induced duct is inserted in the described lower space of described scattered tower along the center line vertical direction with described scattered tower;
-product-collecting bucket, described product-collecting bucket is connected to the bottom of described scattered tower via extension tube;
-expansion chamber, described expansion chamber have entrance and the first outlet and the second outlet, and the entrance of described expansion chamber is connected with described induced duct in the described scattered tower, and first of described expansion chamber exports and is connected to described product-collecting bucket;
-cyclone separator has entrance, and the entrance of described cyclone separator is connected with the second outlet of described expansion chamber.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises: fines collection bucket, described cyclone separator also have the first outlet, and the first outlet of described cyclone separator is connected to described fines collection bucket.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises: exhaust gas processing device, described exhaust gas processing device has entrance; Described cyclone separator also has the second outlet, and the second outlet of described cyclone separator is connected to the entrance of described exhaust gas processing device.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises: the umbrella member that is arranged on the top of described induced duct supportedly.
According to screening system of the present utility model, it is characterized in that, the top of described scattered tower is cylindrical shape, and the bottom of described scattered tower is cone.
According to screening system of the present utility model, it is characterized in that, described induced duct is inserted on the conical shell of described scattered tower bottom.
According to screening system of the present utility model, it is characterized in that, described catalyst transport and dispersal device also comprise air inlet pipe, carrier pipe, communicating pipe, control valve.
According to screening system of the present utility model, it is characterized in that, the cylinder-shaped upper part of described scattered tower is open type or cellular air inlet is installed.
According to screening system of the present utility model, it is characterized in that, the described disperser of described catalyst transport and dispersal device is installed in and the be separated by cylinder center position of 0.1～2m of the cylinder-shaped upper part of described scattered tower, described umbrella member is installed in the cone segments of described scattered tower bottom, is connected to the stent support of scattered tower cone by 2～8 root beads.
According to screening system of the present utility model, it is characterized in that, described umbrella member is conical, the diameter of circular cone is 0.10～0.65 times of barrel diameter of described scattered tower, the conical surface angle of described umbrella member is 30～150 degree, described umbrella member is installed in the middle and lower part of described scattered tower near the center position of the cone of described scattered tower, is connected to the stent support of scattered tower cone by 2～8 root beads.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises butterfly valve and air-introduced machine.
According to screening system of the present utility model, it is characterized in that, described catalyst transport and dispersal device are the boring device of sprinkle nozzle, ball-type perforating, oval aperture formula or tubulose perforating.
According to screening system of the present utility model, it is characterized in that, described exhaust gas processing device comprises sack cleaner or foam dust arrester.
According to screening system of the present utility model, it is characterized in that, the bottom of described expansion chamber is cone.
According to screening system of the present utility model, it is characterized in that, the number of described cyclone separator is 1-3, preferred 1.
Screening system of the present utility model is compared with existing screening system, has following advantage:
1. the screening efficiency of the utility model screening system is high, can realize the continuous dispersion screening of catalyst, can be under the prerequisite of not losing qualified products, maximized defective fine powder is isolated product.
2. screening process can not produce excessive wear to catalyst because adopting gas to carry and injection, can at utmost keep the catalyst original appearance, reduces catalyst loss.
3. in screening process, particle is adjusted to the particle size range of required screening by changing operating condition.
4. screening system key of the present utility model is that screening does not need screen cloth, and the work of having saved frequent replacing screen cloth and having cleaned screen cloth can realize continuous operation, and whole screening is simple to operate, and required manpower is few.
5. screening process only needs an air-introduced machine and Compressed Gas, and with respect to high power motor that traditional vibrating sieving machine adopts, its energy consumption is lower.
6. screening process is finished at confined space fully, and the scene can not produce dust, and is harmless to the people; Tail gas can greatly reduce environmental pollution through multi-stage separation.
Description of drawings
By the detailed description below in conjunction with accompanying drawing, above-mentioned and further feature of the present utility model and advantage will become more obvious, in the accompanying drawing:
Fig. 1 is the process chart that is used for catalyst screening method during according to the utility model embodiment.
Fig. 2 is for the device schematic diagram of implementing according to catalyst screening method during of the present utility model.
Fig. 3 is the catalyst transport used in an embodiment of the present utility model and the structural representation of dispersal device 1.
Main symbol description
1 catalyst transport and dispersal device 2 scattered towers 3 expansion chambers
4 cyclone separators, 5 exhaust gas processing devices, 6 air-introduced machines
7 butterfly valves, 8 umbrella members, 9 induced ducts, 10 product-collecting buckets
11 fines collection buckets, 12 Compressed Gas entrances, 13 communicating pipes 20 carrier pipe
18 catalyst charge buckets, 15 dispersers 14,16,17,19 control valves.
The specific embodiment
In the utility model, for outstanding emphasis of the present utility model, operation and unit, the parts of some routines are omitted, or only do simple the description.
In the utility model, " with ... connect " or " being connected to " or " connections ", both can be that the two directly links to each other, also can across common parts or device (such as valve, pump etc.) links to each other or connection.
In one aspect, the utility model provides a kind of screening system that sieves the synthetic catalyst of Fischer-Tropsch, it is characterized in that, described screening system comprises:
-catalyst transport and dispersal device, described catalyst transport and dispersal device comprise catalyst charge bucket and disperser;
-scattered tower, described scattered tower has upper space and lower space, and the described disperser of described catalyst transport and dispersal device is arranged in the described upper space of described scattered tower;
-induced duct is arranged in the described lower space of described scattered tower;
-product-collecting bucket, described product-collecting bucket is connected to the bottom of described scattered tower via extension tube;
-expansion chamber, described expansion chamber have entrance and the first and second outlets, and the entrance of described expansion chamber is connected with described induced duct in the described scattered tower, and first of described expansion chamber exports and is connected to described product-collecting bucket;
-cyclone separator has entrance, and the entrance of described cyclone separator is connected to the second outlet of described expansion chamber.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises: fines collection bucket, described cyclone separator also have the first outlet, and the first outlet of described cyclone separator is connected to described fines collection bucket.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises: exhaust gas processing device, described exhaust gas processing device has entrance; Described cyclone separator also has the second outlet, and the second outlet of described cyclone separator is connected to the entrance of described exhaust gas processing device.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises: the umbrella member that is arranged on the top of described induced duct supportedly.
According to screening system of the present utility model, it is characterized in that, the top of described scattered tower is cylindrical shape, and the bottom of described scattered tower is cone.
According to screening system of the present utility model, it is characterized in that, described induced duct is arranged on the conical shell of described scattered tower bottom.
According to screening system of the present utility model, it is characterized in that, described catalyst transport and dispersal device also comprise air inlet pipe, carrier pipe, communicating pipe, control valve.
According to screening system of the present utility model, it is characterized in that, the cylinder-shaped upper part of described scattered tower is open type or cellular air inlet is installed.
According to screening system of the present utility model, it is characterized in that, the described disperser of described catalyst transport and dispersal device is installed in and the be separated by cylinder center position of 0.1～2m of the cylinder-shaped upper part of described scattered tower, and described umbrella member is installed in the cone segments of described scattered tower bottom.
According to screening system of the present utility model, it is characterized in that, described umbrella member is conical, the diameter of circular cone is 0.10～0.65 times of barrel diameter of described scattered tower, the conical surface angle of described umbrella member is 30～150 degree, described umbrella member is installed in the middle and lower part of described scattered tower near the center position of the cone of described scattered tower, is connected to the stent support of scattered tower cone by 2～8 root beads.
According to screening system of the present utility model, it is characterized in that, described screening system also comprises butterfly valve and air-introduced machine.
According to screening system of the present utility model, it is characterized in that, described catalyst transport and dispersal device are the boring device of sprinkle nozzle, ball-type perforating, oval aperture formula or tubulose perforating.
According to screening system of the present utility model, it is characterized in that, described exhaust gas processing device comprises sack cleaner or foam dust arrester.
According to screening system of the present utility model, it is characterized in that, the bottom of described expansion chamber is cone.
According to screening system of the present utility model, it is characterized in that, the number of described cyclone separator is 1-3.
In yet another aspect, the utility model provides a kind of method for sieving for the synthetic catalyst of Fischer-Tropsch, comprises following steps:
(a) catalyst to be sieved is encased in the charging ladle of catalyst transport and dispersal device, described catalyst disperser via the carrier pipe front end of described catalyst transport and dispersal device under the drive of Compressed Gas enters scattered tower, and wherein said catalyst Jet with downward flow direction from a plurality of apertures of described disperser disperses out;
(b) catalyst granules through spray disperseing drops downwards under Action of Gravity Field and the top-down air inducing effect that provided by induced duct, and bulky grain drops on the conical shell of scattered tower bottom;
(c) fine powder and part are installed in described induced duct than granule and siphon away, and most of product-collecting bucket that directly drops on the below, cone space that is arranged in described scattered tower than granule;
(d) after the described fine powder in the step (c) and the less particle of part enter induced duct, enter into expansion chamber with air inducing, less particle is deposited in the bottom of described expansion chamber owing to Action of Gravity Field and is slipped in the described product-collecting bucket, superfine particle continues to leave described expansion chamber with air inducing, enters into cyclone separator; And alternatively
(e) in described cyclone separator, fine powder is separated to get off, and enters the fines collection bucket, and other enters exhaust gas processing device after can not being left described cyclone separator with air inducing by the dust of cyclonic separation, at this fine powder is held back, gas is then emptying from eminence by the tail gas evacuated tube.
Preferably, described catalyst is the microsphere particle form.
Preferably, in step (b), described induced duct is arranged on the conical shell of described scattered tower bottom, and the umbrella member is set above described induced duct, and described part bulky grain drops on described umbrella member, and the edge from described umbrella member falls again.
Preferably, in step (c), around the described umbrella member and the catalyst of landing on the described umbrella member drop in the cone space of described scattered tower bottom, fine powder and part siphon away than the induced duct that granule is positioned at described umbrella member below, and most of product-collecting bucket that directly drops on the below, cone space that is arranged in described scattered tower than granule.
Preferably, described catalyst transport and dispersal device are used for realizing the continuous flow formula conveying of catalyst powder particle and disperseing.
Preferably, described catalyst transport and dispersal device comprise storage tank, air inlet pipe, carrier pipe, communicating pipe, control valve and disperser.
Preferably, the described oarse-grained particle diameter in the step (b) is more than the 70 μ m.
Preferably, the described more short grained particle diameter in the step (c) is below the above 70 μ m of 40 μ m, and the particle diameter of described fine powder is below the 40 μ m.
Preferably, the top of described scattered tower is cylindrical shape, and the bottom of described scattered tower is cone, and the bottom of described cone connects the prolongation tank, is used for connecting described product-collecting bucket.
Preferably, the cylinder-shaped upper part of described scattered tower is open type or cellular air inlet is installed.
Preferably, described catalyst disperser is installed in and the be separated by cylinder center position of 0.1～2m of described cylinder-shaped upper part, and described umbrella member is installed in the cone segments of described scattered tower bottom.
Preferably, described umbrella member is conical, the diameter of circular cone is 0.10～0.65 times of barrel diameter, the conical surface angle of described umbrella member is 30～150 degree, described umbrella member is installed in the middle and lower part of described scattered tower near the center position of cone, is connected to the stent support of scattered tower cone by 2～8 root beads.
Preferably, the air inducing amount in the step (e) is regulated or is regulated by changing the air-introduced machine frequency by regulating the butterfly valve opening of installing on the tail gas evacuated tube.
Preferably, the described catalyst transport of using in the step (a) and dispersal device are the boring device of sprinkle nozzle, ball-type perforating, oval aperture formula or tubulose perforating, preferred sprinkle nozzle boring device.
Preferably, the described exhaust gas processing device that uses in the step (e) comprises sack cleaner or foam dust arrester, preferred foam dust arrester.
Preferably, the bottom of the described expansion chamber that uses in the step (d) is cone, directly is slipped to after sedimentation in the described product-collecting groove thereby make than granule.
Preferably, the number of the described cyclone separator that uses in the step (e) is 1-3, preferred 1.
Preferably, the Compressed Gas described in the step (a) is the compressed nitrogen of compressed air or multiple purity, the preferred compressed air.
Preferably, the umbrella member is arranged on the top of described induced duct, is connected to the stent support of scattered tower cone by 2～8 root beads, preferred 3.
Below with reference to Fig. 1-Fig. 3 to being described according to the method for sieving that is used for the synthetic catalyst of Fischer-Tropsch of the utility model embodiment and the device of use.
Fig. 1 is the process chart of catalyst screening method during of the present utility model.As shown in Figure 1, at first, catalyst to be sieved is encased in the charging ladle of catalyst transport and dispersal device and disperses, make the catalyst bulky grain of dispersion under Action of Gravity Field and top-down air inducing effect, enter the product-collecting bucket as qualified products.After making part less particle entering induced duct, enter into expansion chamber with air inducing, under Action of Gravity Field, be deposited in the bottom of described expansion chamber and be slipped in the described product-collecting bucket as qualified products.Fine powder leaves described expansion chamber with air inducing, enters into cyclone separator, and substandard fine grained is separated to get off, and enters the fines collection bucket as waste material.Enter exhaust gas processing device after making other more fine dust leave described cyclone separator with air inducing, fine powder is held back, and gas is emptying from eminence by the tail gas evacuated tube.
Below with reference to Fig. 2 catalyst screening method during of the present utility model is described in detail.Fig. 2 is for the device schematic diagram of implementing according to catalyst screening method during of the present utility model.
As shown in Figure 2, at first, catalyst to be sieved is encased in the catalyst charge bucket 18 of catalyst transport and dispersal device 1 and disperses.Described catalyst transport and dispersal device 1 are used for realizing the continuous flow formula conveying of catalyst powder particle and disperseing, and comprise storage tank, air inlet pipe, carrier pipe, communicating pipe, control valve and disperser.Then, pass into as catalyst from Compressed Gas entrance 12 and flow and spray compressed air or the compressed nitrogen that disperses to provide power.Described catalyst disperser 15 via the carrier pipe front end of described catalyst transport and dispersal device 1 under the drive of the Compressed Gas of being introduced by air inlet pipe 12 enters scattered tower 2, and wherein said catalyst Jet with downward flow direction from a plurality of apertures of described disperser 15 disperses out.Described scattered tower 2 has upper space and lower space, and the described disperser 15 of described catalyst transport and dispersal device 1 is arranged in the described upper space of described scattered tower 2.The catalyst bulky grain that makes dispersion enters product-collecting bucket device 10 as qualified products under Action of Gravity Field and the top-down air inducing effect that provided by the induced duct 9 in the described lower space that is arranged on described scattered tower 2, wherein, described induced duct 9 is arranged in the described lower space of described scattered tower 2 abreast with the longitudinal side wall of described scattered tower 2, and product-collecting bucket 10 is positioned at the below of described scattered tower 2, and described product-collecting bucket 10 is connected to the bottom of described scattered tower 2 via extension tube 22.Preferably, partially catalyzed agent particle drop be arranged on supportedly induced duct 9 above umbrella member 8 on, edge Uniform Dispersion from umbrella member 8 falls again, all the other catalyst granules then directly fall to the space around the umbrella member 8, and particle diameter directly drops on product-collecting bucket 10 cone base that be arranged in scattered tower 2 below than granule greater than the bulky grain of 70 μ m and part particle diameter between 40 μ m and 70 μ m.After making part less particle entering induced duct 9, enter into expansion chamber 3 with air inducing from the entrance 31 of expansion chamber 3, under Action of Gravity Field, be deposited in the cone-shaped bottom of described expansion chamber and be slipped in the described product-collecting bucket 10 as qualified products.Fine powder leaves described expansion chamber 3 with air inducing from the first outlet 32 of expansion chamber 3, enter into cyclone separator 4 from the entrance 41 of cyclone separator 4, substandard fine grained is separated to get off, and exports 42 from first of cyclone separator 4 and enters fines collection bucket 11 as waste material.After making other more fine dust leave described cyclone separator 4 with air inducing from the second outlet 43 of cyclone separator 4, enter the exhaust gas processing device 5 from the entrance 51 of exhaust gas processing device 5, fine powder is held back, and gas is emptying from eminence by tail gas evacuated tube 21.Can regulate or regulate the air inducing that is provided by induced duct 9 by the frequency that changes air-introduced machine 6 by the aperture of regulating the butterfly valve 7 of installing on the tail gas evacuated tube 21.
In Fig. 2, the cylinder-shaped upper part of described scattered tower 2 is open type or cellular air inlet is installed.Described catalyst disperser 15 is installed in and the be separated by cylinder center position of 0.1～2m of described cylinder-shaped upper part, and described umbrella member 8 is installed in the cone segments of described scattered tower 2 bottoms.Preferably, described umbrella member 2 is conical, the diameter of circular cone is 0.10～0.65 times of barrel diameter, the conical surface angle of described umbrella member is 30～150 degree, described umbrella member is installed in the middle and lower part of described scattered tower near the center position of cone, is connected to the stent support of scattered tower cone by 2～8 root beads.The induced duct 9 that fine powder and part granule are installed in center, umbrella member 8 below siphons away, and enters into expansion chamber 3 with the air inducing that provides by air-introduced machine 6.Less particle is deposited in the cone of expansion chamber 3 bottoms owing to Action of Gravity Field, and directly is slipped in the described product-collecting bucket 10.The fine powder of particle diameter below 40 μ m continues to leave expansion chamber with air inducing from the second outlet 33 of expansion chamber 3, enters into cyclone separator 4.Butterfly valve 7 apertures of installing on the tail gas evacuated tube 21 are regulated or regulate the air inducing amount by the frequency of change air-introduced machine 6 by regulating, to realize adjusting the grain diameter scope that enters each collecting vessel, so that in cyclone separator, substandard fine powder is separated and enters in the fines collection bucket 11, other more fine dust then leaves cyclone separator with air inducing and enters into foam dust arrester as exhaust gas processing device 5, fine powder is held back, and the gas eminence is emptying.The number of the described cyclone separator that uses in the utility model is 1-3, preferred 1.In addition, air-introduced machine 6 in the utility model is to provide air inducing for screening process, the size that aperture that can be by adjusting butterfly valve 7 or the power of directly regulating air-introduced machine 6 are regulated air inducing, thereby regulate the appeal of induced duct 9 and the gas flow rate of expansion chamber, and then regulate the particle size range of the catalyst that enters product-collecting bucket 10.
Fig. 3 is the catalyst transport used in the embodiment of the present utility model and the structural representation of dispersal device 1.As shown in Figure 3, before catalyst charge bucket 18 that catalyst to be sieved is packed into, shut off valve 14,16,19, open valve 17, from the bell mouth of the valve 17 tops catalyst of packing into, shut off valve 17 after charging is finished, open successively valve 16 and 14, control the flow velocity of Compressed Gas by the aperture of control valve 14, after the gas flow rate adjustment is stable, slow open valve 19.Can control by the aperture of control valve 19 falling speed of catalyst, the catalyst of whereabouts is delivered to disperser 15 with Compressed Gas via carrier pipe 20, sprays from the aperture of disperser 15 and disperses out.Herein, the effect of communicating pipe 13 is to ensure that the top and the bottom pressure air pressure of catalyst charge bucket 18 is consistent, so that catalyst can fall smoothly.
Comparative Examples 1
Get the 50g catalyst from the synthetic Fe-series catalyst of the mixed uniformly Fischer-Tropsch to be sieved of 100kg, be numbered A, adopt laser particle analyzer to test its size distribution, the results are shown in Table 1 in acquisition.
From the synthetic Fe-series catalyst of above-mentioned mixed uniformly Fischer-Tropsch to be sieved, get the 50g catalyst, be numbered B, place 300 orders (50 μ m) standard screen to carry out the vanning jig screening, every screening 10 minutes, change 1 ultrasonic cleaning and dry good standard screen, change altogether 3 times, adopt the catalyst grain size after laser particle analyzer testing standard sieve sieves to distribute, the results are shown in Table 1 in acquisition.
Embodiment 1
Take by weighing 5kg in the synthetic Fe-series catalyst of Fischer-Tropsch mixed uniformly to be sieved from above-mentioned Comparative Examples 1, be numbered C, the catalyst charge bucket of packing into, control Compressed Gas admission pressure is 0.5bar, standard-sized sheet air inducing butterfly valve 7, standard-sized sheet bleeder valve 19, catalyst enters in the scattered tower with Compressed Gas and disperses, and after the catalyst screening is finished, collects finished catalyst and weigh, evenly get the 50g finished catalyst and carry out the laser particle analyzer test, the results are shown in Table 1 in acquisition.
From above-mentioned Comparative Examples 1, take by weighing 5kg in the synthetic Fe-series catalyst of mixed uniformly Fischer-Tropsch to be sieved, be numbered D, the catalyst charge bucket of packing into, control Compressed Gas admission pressure is 1.0bar, standard-sized sheet air inducing butterfly valve 7, standard-sized sheet bleeder valve 19, catalyst enters in the scattered tower with Compressed Gas and disperses, and after the catalyst screening is finished, collects finished catalyst and weigh, evenly get the 50g finished catalyst and carry out the laser particle analyzer test, the results are shown in Table 1 in acquisition.
Take by weighing 5kg in the synthetic Fe-series catalyst of Fischer-Tropsch mixed uniformly to be sieved from above-mentioned Comparative Examples 1, be numbered E, the catalyst charge bucket of packing into, control Compressed Gas admission pressure is 0.5bar, standard-sized sheet air inducing butterfly valve 7, half-open bleeder valve 19, catalyst enters in the scattered tower with Compressed Gas and disperses, and after the catalyst screening is finished, collects product catalyst and weigh, evenly get the 50g product catalyst and carry out the laser particle analyzer test, the results are shown in Table 1 in acquisition.
Table 1 catalyst laser particle size analysis result
By table 1 data as can be known, catalyst accounts for 14.6% of catalyst total amount without the catalyst content less than 50 μ m before the screening, after sieving three times, the standard screen mechanical oscillation are reduced to 2.2%, the content less than 50 μ m is respectively 2.8%, 2.1% and 1.9% in the rear catalyst product and three kinds of operating conditions in the present embodiment are once sieved, efficient is high, and is suitable even higher with result behind three mechanical gradings.Compare with shake sieve screening of tradition, the application's method is simple to operate, and screening efficiency is high, and site environment is not had dust pollution, can realize continuous production, greatly reduces production costs.
Screening system of the present utility model is compared with existing screening system, has following advantage:
1. screening system screening efficiency of the present utility model is high, can realize the continuous dispersion screening of catalyst, can be under the prerequisite of not losing qualified products, maximized defective fine particle is isolated product.
2. screening process can not produce excessive wear to catalyst because adopting gas to carry and injection, can at utmost keep the catalyst original appearance, reduces catalyst loss.
3. in screening process, particle is adjusted to the particle size range of required screening by changing operating condition.
4. screening system key of the present utility model is that screening does not need screen cloth, and the work of having saved frequent replacing screen cloth and having cleaned screen cloth can realize continuous operation, and whole screening is simple to operate, and required manpower is few.
5. screening process only needs an air-introduced machine and Compressed Gas, and with respect to high power motor that traditional vibrating sieving machine adopts, its energy consumption is lower.
6. screening process is finished at confined space fully, and the scene can not produce dust, and is harmless to the people; Tail gas can greatly reduce environmental pollution through multi-stage separation.
With reference to embodiment and embodiment the utility model is described.Yet, the aspect that the utility model is not limited to describe in the above-described embodiment and examples, and can carry out various distortion.But should be appreciated that for a person skilled in the art, in the situation that do not deviate from spirit and scope of the present utility model, can carry out various modifications and be equal to replacement the utility model.Therefore, the utility model specific embodiment of being not limited to describe in this article.More properly, protection domain of the present utility model is limited by the accompanying claims.
Claims (15)
1. a screening system that sieves the synthetic catalyst of Fischer-Tropsch is characterized in that, described screening system comprises:
-catalyst transport and dispersal device (1), described catalyst transport and dispersal device (1) comprise catalyst charge bucket (18) and disperser (15);
-scattered tower (2), described scattered tower (2) has upper space and lower space, and the described disperser (15) of described catalyst transport and dispersal device (1) is arranged in the described upper space of described scattered tower (2);
-induced duct (9) is inserted in the described lower space of described scattered tower (2) along the center line vertical direction with described scattered tower (2);
-product-collecting bucket (10) is positioned at the below of described scattered tower (2), and described product-collecting bucket (10) is connected to the bottom of described scattered tower (2) via extension tube;
-expansion chamber (3), described expansion chamber (3) has entrance (31) and the first outlet (32) and the second outlet (33), the entrance (31) of described expansion chamber (3) is connected to the described induced duct (9) in the described scattered tower (2), and the first outlet (32) of described expansion chamber (3) is connected to described product-collecting bucket (10);
-cyclone separator (4) has entrance (41), and the entrance (41) of described cyclone separator (4) is connected with the second outlet (33) of described expansion chamber (3).
2. screening system according to claim 1 is characterized in that, described screening system also comprises: the umbrella member (8) that is arranged on the top of described induced duct (9) supportedly.
3. screening system according to claim 1, it is characterized in that, described screening system also comprises: fines collection bucket (11), described cyclone separator (4) also has the first outlet (42), and the first outlet (42) of described cyclone separator (4) is connected to described fines collection bucket (11).
4. screening system according to claim 3 is characterized in that, described screening system also comprises: exhaust gas processing device (5), and described exhaust gas processing device (5) has entrance (51); Described cyclone separator (4) also has the second outlet (43), and the second outlet (43) of described cyclone separator (4) is connected to the entrance (51) of described exhaust gas processing device (5).
5. screening system according to claim 1 is characterized in that, the top of described scattered tower (2) is cylindrical shape, and the bottom of described scattered tower (2) is cone.
6. screening system according to claim 5 is characterized in that, described induced duct (9) is inserted on the conical shell of described scattered tower (2) bottom.
7. screening system according to claim 1 is characterized in that, described catalyst transport and dispersal device (1) also comprise air inlet pipe (12), carrier pipe (20), communicating pipe (13), control valve (14,16,17,19).
8. screening system according to claim 5 is characterized in that, the cylinder-shaped upper part of described scattered tower (2) is open type or cellular air inlet is installed.
9. screening system according to claim 2, it is characterized in that, the described disperser (15) of described catalyst transport and dispersal device (1) is installed in and the be separated by cylinder center position of 0.1～2m of the cylinder-shaped upper part of described scattered tower (2), described umbrella member (8) is installed in the cone segments of described scattered tower (2) bottom, is connected to the stent support of scattered tower cone by 2～8 root beads.
10. screening system according to claim 2, it is characterized in that, described umbrella member (8) is conical, the diameter of circular cone is 0.10～0.65 times of barrel diameter of described scattered tower (2), the conical surface angle of described umbrella member (8) is 30～150 degree, described umbrella member (8) is installed in the middle and lower part of described scattered tower (2) near the center position of the cone of described scattered tower (2), is connected to the stent support of scattered tower cone by 2～8 root beads.
11. screening system according to claim 3 is characterized in that, described screening system also comprises butterfly valve (7) and air-introduced machine (6).
12. screening system according to claim 1 is characterized in that, described catalyst transport and dispersal device (1) are the boring device of sprinkle nozzle, ball-type perforating, oval aperture formula or tubulose perforating.
13. screening system according to claim 4 is characterized in that, described exhaust gas processing device (5) comprises sack cleaner or foam dust arrester.
14. screening system according to claim 1 is characterized in that, the bottom of described expansion chamber (3) is cone.
15. screening system according to claim 1 is characterized in that, the number of described cyclone separator (4) is 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220091166 CN202683484U (en) | 2012-03-12 | 2012-03-12 | Screening system for screening catalytic agents of Fischer-Tropsch synthesis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220091166 CN202683484U (en) | 2012-03-12 | 2012-03-12 | Screening system for screening catalytic agents of Fischer-Tropsch synthesis |
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| Publication Number | Publication Date |
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| CN202683484U true CN202683484U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220091166 Expired - Lifetime CN202683484U (en) | 2012-03-12 | 2012-03-12 | Screening system for screening catalytic agents of Fischer-Tropsch synthesis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601057A (en) * | 2012-03-12 | 2012-07-25 | 神华集团有限责任公司 | Method for screening catalyst for Fischer Tropsch synthesis |
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- 2012-03-12 CN CN 201220091166 patent/CN202683484U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601057A (en) * | 2012-03-12 | 2012-07-25 | 神华集团有限责任公司 | Method for screening catalyst for Fischer Tropsch synthesis |
| CN102601057B (en) * | 2012-03-12 | 2013-11-20 | 神华集团有限责任公司 | Method for screening catalyst for Fischer Tropsch synthesis |
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