CN220835428U - Fluidized bed granulating device - Google Patents
Fluidized bed granulating device Download PDFInfo
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- CN220835428U CN220835428U CN202322616970.1U CN202322616970U CN220835428U CN 220835428 U CN220835428 U CN 220835428U CN 202322616970 U CN202322616970 U CN 202322616970U CN 220835428 U CN220835428 U CN 220835428U
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- 238000005406 washing Methods 0.000 claims abstract description 64
- 238000001035 drying Methods 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 238000005243 fluidization Methods 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 30
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 238000000889 atomisation Methods 0.000 claims abstract description 20
- 238000005469 granulation Methods 0.000 claims abstract description 18
- 230000003179 granulation Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 25
- 239000008187 granular material Substances 0.000 claims description 22
- 238000009477 fluid bed granulation Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 229910002651 NO3 Inorganic materials 0.000 abstract description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract description 4
- 238000012824 chemical production Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- NGLMYMJASOJOJY-UHFFFAOYSA-O azanium;calcium;nitrate Chemical compound [NH4+].[Ca].[O-][N+]([O-])=O NGLMYMJASOJOJY-UHFFFAOYSA-O 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- 238000011221 initial treatment Methods 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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Abstract
The utility model relates to a fluidized bed granulating device, and belongs to the technical field of chemical production. The device comprises a fluidized bed granulator, wherein the fluidized bed granulator is respectively provided with a granulating section, a drying section and a cooling section; the fluidized bed granulator is connected with an air pipeline and a slurry feeding pipe, and required atomization air and fluidization air are provided by a fan; the granulating machine comprises a granulating machine, a double-layer screen, a crusher and a bucket elevator, wherein a granulating section of the granulating machine is connected with the other end of the bucket elevator; the tail gas outlet of the granulator is sequentially connected with a Venturi scrubber and a washing demister, and the tail gas is sent to an exhaust funnel to be discharged after being treated by the Venturi scrubber and the washing demister. In the device, granulation, drying and cooling are completed in fluidized bed equipment at one time, and tail gas generated by particle cooling is circulated to dry particles, so that heat energy of cooling tail gas is effectively utilized, and energy consumption is reduced. The device is used for producing nitrate, and has good economic benefit and environmental benefit.
Description
Technical Field
The utility model relates to a fluidized bed granulating device, and belongs to the technical field of chemical production devices.
Background
The development of fluidized bed technology has been in recent centuries, and fluidized bed granulation, drying and cooling technologies have been widely used in the chemical industry since 90 s of the last century, due to the advantages of large contact area of two phases, uniform mixing, high mass transfer efficiency, large capacity of a single device, etc. However, the fluidized bed granulation technology is only used for large-particle urea and has not been accepted in granulation production of other chemical products because of long process flow, more equipment and higher energy consumption.
At present, the nitrate granulating mode in China mainly adopts tower-type granulating, and has the advantages of low investment and running cost, but has the defects of small particles of products, low strength, small single set of equipment scale, large exhaust gas amount, high treatment cost and the like.
Therefore, there is an urgent need to provide a fluidized bed granulation device using slurry as a raw material with low energy consumption, so as to meet the needs of the current market.
Disclosure of utility model
The utility model provides a fluidized bed granulating device, wherein granulation, drying and cooling are completed in fluidized bed equipment at one time, and tail gas generated by cooling particles is circulated to dry the particles, so that heat energy of cooling tail gas is effectively utilized, and energy consumption is reduced. The granulation tail gas is treated by a venturi device and a washing demister and then discharged after reaching the standard.
The utility model adopts the following technical scheme:
A fluidized bed granulating device comprises a slurry feeding pipe, a fluidized bed granulator, a double-layer screen, a bucket elevator, a venturi scrubber and a washing demister; the fluidized bed granulator is respectively provided with a granulating section, a drying section and a cooling section; the fluidized bed granulator is connected with an air pipeline and a slurry feeding pipe, and required atomization air and fluidization air are provided by a fan; the granulating machine comprises a granulating machine, a double-layer screen, a crusher and a bucket elevator, wherein a granulating section of the granulating machine is connected with the other end of the bucket elevator; the tail gas outlet of the granulator is sequentially connected with a Venturi scrubber and a washing demister, and the tail gas is sent to an exhaust funnel to be discharged after being treated by the Venturi scrubber and the washing demister.
In the device, the fluidized bed granulator is divided into an upper box body and a lower box body from top to bottom, the middle parts of the upper box body and the lower box body are separated by a fluidization plate, and holes of the fluidization plate are distributed in a regular triangle mode; the fluidized bed granulator is divided into a granulating section, a drying section and a cooling section from left to right, and a separation plate is arranged between each section; the granulating section fluidization plate is provided with a plurality of granulating nozzles, the upper box body is provided with an air outlet and a return inlet, and the lower box body is provided with a feed liquid inlet, an atomizing air inlet and a fluidization air inlet; the upper box body of the drying section is provided with an air outlet, and the lower box body is provided with an air inlet; the upper box body of the cold section is provided with an air outlet, and the lower box body is provided with an air inlet and a granular material outlet; the air outlets of the granulating section, the drying section and the cooling section are arranged on the same side plate, and the side plate opposite to the side plate is connected with the top plate by an inclined plate forming 45-65 degrees with the horizontal direction.
In the device, the cooling section air outlet is connected with the drying air fan, the drying air heater and the drying section air inlet in sequence.
In the device, feed liquid enters a granulating nozzle on a granulating section fluidization plate through a slurry feed pipe, atomizing air is connected with the granulating nozzle through an atomizing air filter, an atomizing air fan and an atomizing air heater, and fluidization air enters a lower box body of the granulating section through the fluidizing air filter, the fluidizing air fan and the fluidizing air heater. Further, the granulating nozzle is of an inner-outer channel structure, the inner part is a slurry channel, and the outer ring system channel is an atomization air channel.
In the device, the cooling air tail gas from the fluidized bed cooling section enters the fluidized bed drying section through the drying air blower and the drying air heater.
In the device, the large particles screened out by the double-layer screen are crushed by the crusher and then lifted by the bucket elevator together with the small particles screened out, and then returned to the granulator.
In the device, three layers of silk screens are arranged in the washing demister, and a plurality of washing nozzles are arranged right in front of each layer of silk screens.
In the device, a primary washing circulating pump is arranged between the venturi scrubber and the washing demister, primary treatment liquid of the washing demister returns to the venturi scrubber through the primary washing circulating pump, and washing liquid with a certain concentration (about 45%) is sent to an evaporation system for recycling. The washing liquid of the washing demister uses process condensate (water is used as a washing medium), a secondary washing circulating pump is arranged between an outlet and an inlet of the washing demister, and the washed dilute solution is sent to a venturi washing unit for use.
The fluidized bed granulating device provided by the utility model has the beneficial effects that:
(1) The device completes granulation, drying and cooling in fluidized bed equipment at one time;
(2) The tail gas generated by cooling the particles is used for drying the particles, and the heat energy of the cooled tail gas can be recycled, so that the steam consumption and the total exhaust of the device are reduced;
(3) The granulating tail gas is subjected to two-stage washing by a Venturi scrubber and a washing demister and then is discharged after reaching the standard;
(4) The device is suitable for granulating nitrate products; the device is used for nitrate production, and has the advantages of good product quality, large particles, high strength, large operation elasticity (load range of 50-120%), low energy consumption and good economic and environmental benefits.
Drawings
FIG. 1 is a schematic view of a fluid bed granulation apparatus of the present utility model;
FIG. 2 is a schematic view of the structure of a fluid bed granulator;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a hole layout of the fluidization plate (top view in FIG. 1);
Fig. 5 is an enlarged schematic view of the granulation nozzle of fig. 1.
In the figure: 1 is a granulator, 2 is an atomizing air filter, 3 is an atomizing air fan, 4 is an atomizing air heater, 5 is a fluidizing air filter, 6 is a fluidizing air fan, 7 is a fluidizing air heater, 8 is a drying air fan, 9 is a drying air heater, 10 is a slurry feed pipe, 11 is a cooling fan, 12 is a double-layer screen, 13 is a crusher, 14 is a bucket elevator, 15 is a venturi scrubber, 16 is a washing demister, 17 is a primary washing circulating pump, 18 is a secondary washing circulating pump, 19 is a tail gas induced draft fan, 20 is an exhaust drum, 21 is an evaporation system, 22 is a granulating section, 23 is a drying section, 24 is a cooling section, 25 is a partition plate, 26 is a fluidization plate, 27 is a window, 28 is a granulating nozzle, 29 is an air inlet, 30 is an air outlet, 31 is a return inlet, 32 is an upper box, 33 is a lower box, 34 is a sloping plate, 35 is a discharge port, 36 is a slurry inlet, 37 is an atomizing air inlet, 38 is a fluidization plate hole, 39 is a slurry channel, and 40 is an atomizing air channel; a is slurry, B is air, C is cooling air, D is process condensate, and E is qualified particles.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 1 to 5, a fluidized bed granulation device comprises a slurry feeding pipe 10, a fluidized bed granulator 1, a double-layer screen 12, a bucket elevator 13, a venturi scrubber 15 and a washing demister 16; the fluidized bed granulator is respectively provided with a granulating section 22, a drying section 23 and a cooling section 24; the fluidized bed granulator 1 is connected with an air pipeline and a slurry feeding pipe 10, and required atomization air and fluidization air are provided by a fan; the granular material outlet of the granulator is sequentially connected with a double-layer sieve 12, a crusher 13 and a bucket elevator 14; the other end of the bucket elevator 14 is connected with a granulating section of a granulator; the tail gas outlet of the granulator is sequentially connected with a Venturi scrubber 15 and a washing demister 16, and the tail gas is sent to an exhaust funnel 20 for discharge by a tail gas induced draft fan 19 after being treated by the Venturi scrubber and the washing demister.
In the device, the fluidized bed granulator is divided into an upper box 32 and a lower box 33 from top to bottom, the middle of the upper box 32 and the lower box 33 is separated by a fluidization plate 26, and a regular triangle mode is adopted for fluidization plate hole distribution 38; the fluidized bed granulator is divided into a granulating section 22, a drying section 23 and a cooling section 24 from left to right, and a partition plate 25 is arranged between each section; the granulating section fluidization plate is provided with a plurality of granulating nozzles 28, the upper box body is provided with an air outlet 30 and a return inlet 31, and the lower box body is provided with a slurry inlet 36, an atomization air inlet 37 and a fluidization air inlet; the upper box body of the drying section is provided with an air outlet 30, and the lower box body is provided with an air inlet 29; the upper box body of the cooling section is provided with an air outlet 30, and the lower box body is provided with an air inlet 29 and a granular material outlet; the air outlets of the granulating section, the drying section and the cooling section are arranged on the same side plate, and the side plate opposite to the side plate is connected with the top plate by an inclined plate 34 which forms 45-65 degrees with the horizontal direction.
In the device, cooling air C enters a cooling section through a cooling fan 11; the cooling section air outlet is connected with the drying air blower, the drying air heater and the drying section air inlet in sequence, namely, the cooling air tail gas from the fluidized bed cooling section enters the fluidized bed drying section 23 through the drying air blower 8 and the drying air heater 9.
In the device, feed liquid enters a granulating nozzle 28 on a granulating section fluidization plate through a slurry feed pipe 10, atomized air is connected with the granulating nozzle 28 through an atomized air filter 2, an atomized air fan 3 and an atomized air heater 4, and fluidization air enters a lower box of the granulating section 22 through a fluidization air filter 5, a fluidization air fan 6 and a fluidization air heater 7. Further, the granulation nozzle 28 has an inner and outer channel structure, with a slurry channel 39 in the inner portion and an atomizing air channel 40 in the outer ring system.
In the above device, the large particles screened by the double-layer screen 12 are crushed by the crusher 13 and then lifted by the bucket elevator 14 with the small particles screened out, and the large particles return to the granulator 1.
In the above device, three layers of silk screens are arranged in the washing demister 16, and a plurality of washing nozzles are arranged right in front of each layer of silk screens.
In the device, a primary washing circulating pump 17 is arranged between the venturi scrubber and the washing demister, primary treatment liquid of the washing demister returns to the venturi scrubber through the primary washing circulating pump, and the primary washing liquid returns to the evaporation system for use after reaching a certain concentration. The process condensate is used as the washing medium in the washing demister 16, a secondary washing circulating pump 18 is arranged between the outlet and the inlet of the washing demister, the process condensate used in the washing demister 16 is washing water, and the washed dilute solution is sent to a venturi washing unit for use.
The use of the fluid bed granulation device according to the utility model is illustrated by the following specific examples:
Example 1
The calcium ammonium nitrate melt with the pressure of 0.45MPa and the temperature of 125 ℃ and the concentration of 99 percent enters a fluidized bed granulation nozzle through a slurry feed pipe 10 to be sprayed, and atomized air with the pressure of 0.05MPa is sprayed into fine liquid drops and sprayed on the surface of a return seed crystal suspended in a fluidized bed layer to be crystallized and solidified. Air is purified by an atomization air filter 2 and then is sent by an atomization air fan 3, preheated to 135 ℃ by an atomization air heater 4, enters a peripheral annular space area of a nozzle of the granulator, protects the nozzle and atomizes feed liquid. In the granulating section of the granulator, particles form a fluidized state under the action of fluidizing air, are continuously stuck and solidified by atomized small liquid drops, and are gradually wrapped, piled and coated into particles with a multilayer dense structure. The air is sent into a fluidization air heater 7 to be preheated to 60 ℃ by a fluidization air fan 6 after being purified by a fluidization air filter 5, and then enters a granulating section of a granulator; the granules grown in the granulating section of the granulator flow into the drying section, and are continuously dried with excessive moisture under the action of drying air, and the moisture content of the granules entering the cooling section from the drying section is less than 0.3%; the tail gas of the cooling section of the granulator is heated to 120 ℃ by a drying air heater 9 under the action of a drying air fan 8, and enters a fluidized bed drying section for drying particles. The cooling fan 11 sends cold air into a cooling section of the granulator, and the granules are cooled to below 50 ℃ by the air and then discharged out of the granulator. The granules are sieved by a double-layer sieve 12 after being discharged out of the granulator, the oversized granules are crushed by a crusher 13 and then are sent to a high place by a bucket elevator 14, and then flow back to the granulator to be used as seed crystals, and qualified calcium ammonium nitrate granules are discharged out of the system to be wrapped and packaged.
The tail gas from the granulating section and the drying section of the granulator is subjected to intensive washing by a Venturi scrubber 15, then is subjected to washing and demisting by a demisting scrubber 16, and after re-washing and three demisting, the content of particles in the tail gas is less than 10mg/m, and finally is sent to an exhaust funnel 20 for discharge by a tail gas induced draft fan 19. The tail gas washing liquid adopts evaporation condensate of a wet line, the circulation is maintained through a primary washing circulating pump 17 and a secondary washing circulating pump 18, and the washed concentrated liquid is sent to a wet line system for recycling.
Example 2
The ammonium nitrate concentrated solution with the pressure of 0.4MPa and the temperature of 150 ℃ and the concentration of 96.5 percent enters a fluidized bed granulation nozzle through a slurry feed pipe 10 to be sprayed, and atomized air with the pressure of 0.045MPa is sprayed into fine liquid drops and sprayed onto the surface of a return seed crystal suspended in a fluidized bed layer to be crystallized and solidified. Air is purified by an atomization air filter 2 and then is sent by an atomization air fan 3, preheated to 160 ℃ by an atomization air heater 4, enters a peripheral annular space area of a nozzle of the granulator, protects the nozzle and atomizes feed liquid. In the granulating section of the granulator, particles form a fluidized state under the action of fluidizing air, are continuously stuck and solidified by atomized small liquid drops, and are gradually wrapped, piled and coated into particles with a multilayer dense structure. The air is purified by a fluidization air filter 5, sent into a fluidization air heater 7 by a fluidization air fan 6 to be preheated to 75 ℃ and then enters a granulating section of the granulator. The granules grown in the granulating section of the granulator flow into the drying section, and are continuously dried with excessive moisture under the action of drying air, and the moisture content of the granules entering the cooling section from the drying section is less than 0.1%; the tail gas of the cooling section of the granulator is heated to 120 ℃ by a drying air heater 9 under the action of a drying air fan 8, and enters a fluidized bed drying section for drying particles. The cooling fan 11 sends cold air into a cooling section of the granulator, and the granules are cooled to below 30 ℃ and then discharged out of the granulator. The granules are sieved by a double-layer sieve 12 after being discharged out of the granulator, the oversized granules are crushed by a crusher 13 and then are sent to a high place by a bucket elevator 14, and then flow back to the granulator to be used as seed crystals, and qualified ammonium nitrate granules are discharged out of the system to be wrapped and packaged.
The tail gas from the granulating section and the drying section of the granulator is subjected to intensive washing by a Venturi scrubber 15, then is subjected to washing and demisting by a demisting scrubber 16, and after re-washing and three demisting, the content of particles in the tail gas is less than 10mg/m, and finally is sent to an exhaust funnel 20 for discharge by a tail gas induced draft fan 19. The tail gas washing liquid adopts evaporation condensate of a wet line, the circulation is maintained through a primary washing circulating pump 17 and a secondary washing circulating pump 18, and the washed concentrated liquid is sent to a wet line system for recycling.
Example 3
The magnesium nitrate melt with the pressure of 0.4MPa and the temperature of 110 ℃ and the concentration of 99 percent enters a fluidized bed granulation nozzle through a slurry feed pipe 10 to be sprayed, and atomized air with the pressure of 0.045MPa is sprayed into fine liquid drops and sprayed on the surface of a return seed crystal suspended in a fluidized bed layer to be crystallized and solidified. Air is purified by an atomization air filter 2 and then is sent by an atomization air fan 3, preheated to 135 ℃ by an atomization air heater 4, enters a peripheral annular space area of a nozzle of the granulator, protects the nozzle and atomizes feed liquid. In the granulating section of the granulator, particles form a fluidized state under the action of fluidizing air, are continuously stuck and solidified by atomized small liquid drops, and are gradually wrapped, piled and coated into particles with a multilayer dense structure. The air is purified by a fluidization air filter 5, sent into a fluidization air heater 7 by a fluidization air fan 6 to be preheated to 55 ℃ and then enters a granulating section of the granulator. The granules grown in the granulating section of the granulator flow into the drying section, and are continuously dried with excessive moisture under the action of drying air, and the moisture content of the granules entering the cooling section from the drying section is less than 0.3%; the tail gas of the cooling section of the granulator is heated to 120 ℃ by a drying air heater 9 under the action of a drying air fan 8, and enters a fluidized bed drying section for drying particles. The cooling fan 11 sends cold air into a cooling section of the granulator, and the granules are cooled to below 50 ℃ and discharged out of the granulator. The granules are sieved by a double-layer sieve 12 after being discharged out of the granulator, the oversized granules are crushed by a crusher 13 and then are sent to a high place by a bucket elevator 14, and then flow back to the granulator to be used as seed crystals, and qualified calcium ammonium nitrate granules are discharged out of the system to be wrapped and packaged.
The tail gas from the granulating section and the drying section of the granulator is subjected to intensive washing by a Venturi scrubber 15, then is subjected to washing and demisting by a demisting scrubber 16, and after re-washing and three demisting, the content of particles in the tail gas is less than 10mg/m, and finally is sent to an exhaust funnel 20 for discharge by a tail gas induced draft fan 19. The tail gas washing liquid adopts evaporation condensate of a wet line, the circulation is maintained through a primary washing circulating pump 17 and a secondary washing circulating pump 18, and the washed concentrated liquid is sent to a wet line system for recycling.
Claims (7)
1. A fluid bed granulation device, characterized in that: comprises a slurry feeding pipe, a fluidized bed granulator, a double-layer screen, a bucket elevator, a Venturi scrubber and a washing demister; the fluidized bed granulator is respectively provided with a granulating section, a drying section and a cooling section; the fluidized bed granulator is connected with an air pipeline and a slurry feeding pipe, and required atomization air and fluidization air are provided by a fan; the granulating machine comprises a granulating machine, a double-layer screen, a crusher and a bucket elevator, wherein a granulating section of the granulating machine is connected with the other end of the bucket elevator; the tail gas outlet of the granulator is sequentially connected with a Venturi scrubber and a washing demister, and the tail gas is sent to an exhaust funnel to be discharged after being treated by the Venturi scrubber and the washing demister.
2. A fluid bed granulation apparatus as defined in claim 1, wherein: the fluidized bed granulator is divided into an upper box body and a lower box body from top to bottom, the middle parts of the upper box body and the lower box body are separated by a fluidization plate, and holes of the fluidization plate are distributed in a regular triangle mode; the fluidized bed granulator is divided into a granulating section, a drying section and a cooling section from left to right, and a separation plate is arranged between each section; the granulating section fluidization plate is provided with a plurality of granulating nozzles, the upper box body is provided with an air outlet and a return inlet, and the lower box body is provided with a feed liquid inlet, an atomizing air inlet and a fluidization air inlet; the upper box body of the drying section is provided with an air outlet, and the lower box body is provided with an air inlet; the upper box body of the cooling section is provided with an air outlet, and the lower box body is provided with an air inlet and a granular material outlet; the air outlets of the granulating section, the drying section and the cooling section are arranged on the same side plate of the box body, the side plate opposite to the side plate is connected with the top plate through an inclined plate, and the inclined plate forms an included angle of 45-65 degrees with the horizontal direction.
3. A fluid bed granulation apparatus as defined in claim 2, wherein: the cooling section air outlet is connected with the drying air fan, the drying air heater and the drying section air inlet in sequence.
4. A fluid bed granulation apparatus as defined in claim 2, wherein: the feed liquid passes through the ground paste inlet pipe and enters the granulation nozzle on the granulation section fluidization plate, the atomization air is connected with the granulation nozzle through an atomization air filter, an atomization air fan and an atomization air heater, and the fluidization air enters the lower box body of the granulation section through a fluidization air filter, a fluidization air fan and a fluidization air heater.
5. A fluid bed granulation apparatus as defined in claim 4, wherein: the granulating nozzle has an inner and outer channel structure, the inside is a slurry channel, and the outside ring system channel is an atomization air channel.
6. A fluid bed granulation apparatus as defined in claim 1, wherein: the large particles screened by the double-layer screen are crushed by the crusher and then lifted by the bucket elevator together with the small particles screened out, and the large particles return to the granulator.
7. A fluid bed granulation apparatus as defined in claim 1, wherein: three layers of silk screens are arranged in the washing demister, and a plurality of washing nozzles are arranged right in front of each layer of silk screens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322616970.1U CN220835428U (en) | 2023-09-26 | 2023-09-26 | Fluidized bed granulating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322616970.1U CN220835428U (en) | 2023-09-26 | 2023-09-26 | Fluidized bed granulating device |
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| CN220835428U true CN220835428U (en) | 2024-04-26 |
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| CN202322616970.1U Active CN220835428U (en) | 2023-09-26 | 2023-09-26 | Fluidized bed granulating device |
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