CN221108128U - Continuous fluidized bed - Google Patents

Abstract

A continuous fluidized bed system relates to the technical field of wet material drying, granulating and cooling equipment. The device comprises a fluidized bed, wherein a dust discharge port of the fluidized bed is connected with a bag-type dust remover, a discharge port of the bag-type dust remover is connected with a granulator, a discharge port of the granulator is connected with a granulator, and a discharge port of the granulator is connected to the fluidized bed. The fluidized bed process is beneficial to greatly reducing the dust amount in a system, improving the particle yield, improving the particle size of a finished product and realizing a large-particle finished product, thereby being more beneficial to the production of the particle finished product, reducing the energy consumption of a production line, reducing the production cost, ensuring safe operation, environmental protection and clean production and ensuring stable continuous production, and is particularly suitable for materials with relatively large amount of small particles in wet materials, easy crushing of solid particles during fluidization and low adhesion rate during granulation of a spray fluidized bed.

Description

Continuous fluidized bed

Technical Field

The utility model relates to the technical field of wet material drying, granulating and cooling equipment, in particular to a continuous fluidized bed system which is used for drying wet raw materials or treating raw material liquid.

Background

Fluidized bed drying technology: fresh air is treated to obtain clean air, the temperature of the clean air rises after passing through a heat exchanger to obtain hot process air, dry cold process air can be obtained through dehumidification, the fresh air can also be directly used as hot process air or cold process air without treatment, and enters an air inlet chamber of a fluidized bed, and heat and mass exchange is carried out between the fresh air and fluidized material particles in the fluidized bed after passing through an air dividing screen; raw wet materials enter a fluidized bed layer, the materials form fluidization on a wind dividing screen plate under the action of hot or cold process wind, the process wind is fully contacted with the materials, the heat and mass exchange efficiency is improved, and the evaporation and separation or stable cooling of water in the materials are promoted; the material particles can form a certain gradient from the inlet to the outlet, and can be continuously dried or used in batches through different fluidized bed forms; the process air and the material are discharged from the fluidized bed body after heat and mass exchange and pass through a dust removing system, can be directly emptied to form an open-circuit circulating system, can be connected to an inlet through a closed-circuit circulating device to form a closed-circuit circulating system, and the dust removing system comprises measurement such as cyclone separators, cloth bag dust collectors, electrostatic dust collectors, dust discharging valves, regulating doors, temperature and humidity pressure and the like, and tail gas treatment (including spray towers and deodorizing devices); the fluidized bed comprises various disclosed forms such as an existing vibrating fluidized bed, a boiling fluidized bed, an internal heat exchange fluidized bed (an internal heat exchanger is arranged in a fluidized chamber), a pulsating fluidized bed, a spouted fluidized bed and the like, and the equipment composition is different according to specific needs, and can be a circular fluidized bed or a rectangular fluidized bed; when the fluidized bed is a circular fluidized bed, the inlet of the material particles can be arranged at any position of the circular fluidized bed body corresponding to the fluidized bed layer and can also be arranged in the separation chamber, and when the fluidized bed is a rectangular fluidized bed, the inlet of the material particles can be arranged at the other end of the material particle outlet and can also be designed at other positions of the bed body, the function of the continuous fluidized bed can be better realized without being close to the outlet of the material particles intentionally (the outlet close to the material particles is beneficial to continuously and stably obtaining a dried or granulated finished product), and if the fluidized bed is used in batches, the purpose can be realized without being close to the outlet of the material particles intentionally.

Characteristics of continuous fluidized bed: the continuous production has good process repeatability and high production efficiency; the method is suitable for continuous drying and granulating, and the final product can be dust-free and has excellent performance; continuous is the best choice for the undesired manual participation of intermediate processes and the prevention of pollution; the energy consumption is low; the structure is compact; because the temperature of the material layer can be low, the safety standard is high, and the material layer is suitable for the treatment of heat-sensitive materials; the operation is reliable; the evaporation intensity is high, and the volume is 1/15-1/30 of that of the spray drying tower; can be suitable for continuous drying and granulating of viscous materials and materials with strong moisture absorption; especially when the yield is relatively large, compared with batch equipment, the method has the absolute advantages of energy consumption and quality.

The fluidized bed has several air holes, air inlet chambers, fluidizing chambers and separating chambers, and may be one-to-one or not one-to-one, one unit structure or multiple unit structure.

When the raw materials are liquid materials, the bed body can be provided with a mother liquor spray gun to form a fluidized bed granulator, and a continuous spray fluidized bed granulator is formed during continuous production, and seed crystals are required to be continuously supplied and finished product particles are required to be continuously discharged at the moment, for example, when the quantity of the seed crystals generated in the fluidized bed granulator is insufficient, the bed body is usually provided with a seed crystal feeding port, and the seed crystals can be in various forms such as spiral conveying, gravity dropping, air feeding and the like; the continuous spray fluidized bed granulator is generally provided with a material particle discharge port above the air dividing plate, wherein the discharge port can be arranged along the air dividing plate or can be arranged by a distance upwards, and the distance is not very large in order to completely discharge the materials in the empty bed body; in normal continuous production, the sources of the seed crystal include cyclone separators, particle crushers, cloth bag dust collectors, internal scattering machines of the bed body, additional addition and the like, for example, the internal seed crystal provided by the internal scattering machines, internal material friction and the like can support continuous granulation production, the bed body can be provided with no seed crystal adding port, but when the fluidized bed is started, the fluidized bed material is required to be paved, namely, the bed body is required to be provided with solid materials, namely, the bed material inlet port, and sometimes the bed material inlet port and the seed crystal adding port can be shared, the seed crystal adding port on the bed body is available in various positions with the inlet of the material particles, and the seed crystal adding port and the inlet of the material particles can be considered to be the same type of port.

A fluid bed granulator device for spray granulation drying of seed crystals is generally used in the following manner: spraying one or more liquid raw materials into a fluidized bed by means of a nozzle, spraying the liquid raw materials onto a solid particle containing particles which are basically smaller than the particles to be produced, evaporating volatile components in the sprayed one or more raw materials, realizing spray granulation of the fluidized bed, realizing four particles of snowflake shape, jin Tangping shape, spheroid shape and sphere shape, continuously feeding seed crystals into the fluidized bed or/and generating seed crystals in the fluidized bed, and continuously discharging the particles from the fluidized bed, namely forming a continuous spray fluidized bed.

In the working process, the reasons that the materials are rubbed with each other, single material particles are crushed, the particle size distribution of wet materials is uneven, and small particles smaller than the particle size of a finished product are more, the adhesion rate of solid components attached to seed crystals after evaporation of water in mist drops in spray granulation is low, the fluidized particles are damaged and crushed by airflow of a nozzle, and the like are led into a separation chamber, the small particles with the sedimentation speed smaller than the upward wind speed in the separation chamber are discharged out of a bed body along with the airflow after separation, and the small particles, namely powder substances, are separated in a follow-up dust removal system; in the dry bed function, more dust materials cannot be used as finished products, and then re-dissolution or additional treatment is needed, so that the energy consumption is high, the yield is low, for example, when the raw materials are wet powder, and the fluidized bed drying is carried out, the granular finished products cannot be obtained; when the separated dust material is used as seed crystal to be added into the fluidized bed in the spray granulation bed function, the particle size of the dust grows into the particle size of the finished product, the adhesion amount of the mist droplets is required to be larger between the seed crystals or after the surface solidification, when the dust amount exceeds the seed crystal requirement, the particle size of the material in the fluidized granulation bed is smaller, even the dust cannot grow into the particle size of the finished product, and the large-particle finished product cannot be obtained, at the moment, the dust is required to be redissolved or treated, when the dust amount is particularly large, even the particle-shaped finished product cannot be obtained, the powder finished product can only be obtained from a subsequent dust removing device, for example, when the material liquid contains the material which is easy to be layered at the bottom, such as crystalline small particles, the sedimentation and bottom phenomenon is easy to occur in a material liquid pipeline, and even if a material liquid reflux pipe and other methods are adopted in a pipeline for conveying the atomized material liquid are adopted, the normal operation of the continuous material liquid supply is ensured, but the situation that the seed crystal supply amount is larger than the required amount when the seed crystal supply amount is larger, namely the adhesion rate is insufficient, the seed crystal is difficult to grow in the fluidized bed.

In the continuous spray fluidized bed granulator, the spray gun can be in various existing forms of top spraying, bottom spraying and side spraying, wherein when the bottom spraying and the side spraying are carried out, the spray gun is embedded in a fluidized material layer, a spray gun opening is easy to block and agglomerate, and when the top spraying is carried out, the spray gun can be arranged in or outside the fluidized material layer, namely outside, but the whole bed body contains a large amount of dust and small particles, so that the spray gun cannot directly observe an atomization working state, particularly a large fluidized bed, and even if one spray gun has atomization faults, if the spray gun cannot observe and process in time, continuous production cannot be carried out, and agglomeration, agglomeration and even collapse of the bed body occur.

Disclosure of utility model

The utility model aims to provide a fluidized bed for drying, granulating and cooling wet materials, which is favorable for greatly reducing the dust amount in a system, improving the granule yield, improving the granule diameter of finished products and realizing large granule finished products, thereby being more favorable for the production of granule finished products, reducing the energy consumption of a production line, reducing the production cost, safely operating, protecting the environment and cleanly producing, ensuring stable continuous production, and being particularly suitable for materials with relatively large amount of small particles in the wet materials, easy crushing and powder dropping of solid particles in fluidization and low dry matter adhesion rate in granulation of a spray fluidized bed.

The technical scheme for achieving the purpose is as follows: the utility model provides a continuous type fluidized bed system, includes the fluidized bed, and the dust exhaust mouth of fluidized bed is connected with sack cleaner, its characterized in that: the discharge port of the bag-type dust collector is connected with a granulator, the discharge port of the granulator is connected with a granulator, and the discharge port of the granulator is connected to a fluidized bed.

The utility model is characterized in that the dust material is granulated by a granulator and is conveyed into a bed body, thereby being finally beneficial to realizing finished product granules and achieving the aim of the utility model.

Furthermore, the granulator is a rolling dry granulator, and the rolling dry granulator can well realize the blocking and granulation of dust particles with low bulk density, and can also well adapt to the blocking and granulation of dust separated by a bag-type dust collector.

Further, the rolling dry granulator is connected with a process air pipe, and the inlet of the process air pipe is connected with a dehumidifier; the low-humidity process air is introduced into the roller type dry-method granulator through the process air pipe, the humidity of the process air is lower than that of the dust or the moisture absorption and stickiness of the material after the granulation of the roller type dry-method granulator, the low-humidity process air can prevent the dust from absorbing moisture and the material after the dry granulation from absorbing moisture, and particularly can be used for demolding the material when the roller type granulator works, and preventing the material from sticking to the surface of a roller of the roller type granulator, so that the roller type dry-method granulator can work normally, the low-humidity process air can also realize the moisture reduction and the temperature reduction of the roller type dry-method granulator, and continuous and stable production is facilitated.

More preferably, the feeding hole of the roller dry-method granulator is provided with a binder feeding device, a spiral pressing device for materials and a collecting barrel, which are beneficial to better granulation of the roller dry-method granulator.

Further, in order to achieve the granulation or dry granulation, the massive large particles are obtained as small particles, in particular as rounded small particles, and the crusher is a hammer or blade crusher.

Further, in order to realize that small particles are sent into the bed body to be used as a finished product or continuously used as seed crystals, a discharge hole of the particle crusher is connected with the fluidized bed through an air conveying mechanism.

When the dust amount in the system is reduced in order to realize better yield, reduce the repeated processing or dissolving amount and larger, the granulator is provided with a screen, the mesh size of the screen is 1-30 times of the particle size of the finished product of the fluidized bed, the rotating speed of the granulator is 400-4000 revolutions per minute, and the crushed material particles can be partially or mostly directly used as the particle size range of the finished product.

Further, a raw material liquid atomizing spray gun is arranged on the fluidized bed, so that a continuous spray fluidized bed granulator is formed together with the fluidized bed, and the continuous spray fluidized bed granulator process for directly obtaining solid particle finished products from liquid raw materials can be realized.

Further, in order to facilitate continuous production and safe and stable production, when atomization faults occur, the atomization faults and timely treatment can be directly observed in a visualized mode, particularly, a large fluidized bed is achieved, the number of spray guns is large, even if one spray gun fails to observe and treat in time, continuous production can not be carried out, agglomeration and even bed collapse phenomena occur in the fluidized bed, the atomization spray gun is provided with a camera installed in the fluidized bed, and the camera is used for observing the atomization state of the spray gun in real time and has a linear distance from the center of a spray gun opening of the atomization spray gun of 20-350mm.

Further, for the fixation and good extraction clearance, change, the maintenance of camera, characterized by: the camera overcoat is equipped with the protection tube, and the protection tube overcoat is equipped with clearance fit's insulating tube, and the clearance between insulating tube and the protection tube is as camera protection wind channel, and the camera protection wind channel is used for blowing the protection wind to the camera one end that is close to the camera, and the material near the camera can be kept apart to the protection wind in the camera protection channel, lets the camera keep clean, realizes long-term continuous observation, still cooling effect.

In order to enable the spray gun to continuously work for a longer time, the spray gun head is not easy to hang and block, the spray gun head plays a self-cleaning role, a spray gun protection pipe arranged on a fluidized bed is arranged outside the atomizing spray gun, a spray gun protection air channel is arranged between the spray gun protection pipe and the atomizing spray gun and used for blowing protection air to one end of the spray gun close to a spray gun opening, and the distance between one end of the spray gun protection pipe close to the spray gun opening of the atomizing spray gun and the atomizing spray gun opening of the atomizing spray gun is between 0mm and 150 mm.

The utility model can comprehensively adopt various schemes of the other prior art to achieve better combination effect.

In summary, the fluidized bed process of the utility model is beneficial to greatly reducing the dust amount in a system, improving the particle yield, improving the particle size of finished products and realizing large-particle finished products, thereby being more beneficial to the production of particle finished products, reducing the energy consumption of production lines, reducing the production cost, ensuring safe operation, environmental protection and clean production, ensuring stable continuous production, and being particularly suitable for materials with relatively large number of small particles in wet materials, easy crushing and powder dropping of solid particles in fluidization and low adhesion rate in spray fluidized bed granulation.

Drawings

Fig. 1 is a schematic view of a rolling dry granulator process according to the present utility model.

FIG. 2 is a schematic view of a fluid bed granulator according to the present utility model.

Fig. 3 is a schematic view of a spray gun and camera of the present utility model.

FIG. 4 is a schematic process flow diagram of a continuous fluidized bed system of the present utility model.

Fig. 5 is a schematic view of another spray gun and camera of the present utility model.

Detailed Description

As shown in fig. 1 and 2, the utility model discloses a continuous fluidized bed system, which comprises a fluidized bed 2, wherein a wind distribution chamber 5, a wind distribution screen 6, a fluidized chamber 7 and a separation chamber 10 are sequentially arranged in the fluidized bed 2 from bottom to top, a dust discharge port 17 of the fluidized bed 2 is correspondingly connected with a bag dust remover 20, a discharge port of the bag dust remover 20 is connected with a rolling dry granulator 23, a discharge port of the rolling dry granulator 23 is connected with a granulator 25, and a discharge port of a granulator material 25 is connected to the fluidized bed 2.

As a further explanation of this example, the rolling dry granulator is only illustrative, and not limiting to the utility model, and the object of the utility model can be achieved by using the remaining dust granulator capable of granulation.

As a further explanation of this embodiment, the discharge port of the bag-type dust collector 20 may be directly connected to the rolling dry granulator 23, the connection structure is beneficial to the discharging of the bag-type dust collector 20, the discharge port of the bag-type dust collector 20 may also be connected to the rolling dry granulator 23 through the first receiving bucket 11, and the arrangement of the first receiving bucket 11 may be more beneficial to the continuous and stable feeding of the rolling dry granulator 23; preferably, a spiral pressing device 22 is further connected between the first material receiving barrel 11 and the rolling dry-method granulator 23, the spiral pressing device 22 is preferably a spiral conical mixer, the arrangement of the spiral pressing device 22 is beneficial to the feeding and the pre-compression of dust materials of the rolling dry-method granulator 23, a spiral conveying device 21 and a fourth closing fan 3 are further optionally arranged between the outlet of the bag-type dust collector 20 and the first material receiving barrel 11, an inlet of the spiral conveying device 21 is connected with the bag-type dust collector 20, an outlet of the spiral conveying device is connected with the fourth closing fan 3, and an outlet of the fourth closing fan 3 is connected with the first material receiving barrel 11.

In this embodiment, the rolling dry granulator 23 is connected with a process air pipe 24 communicating with the inner cavity, the process air pipe 24 can be separately connected to the upper end or the lower end of the rolling dry granulator 23, or both the upper end and the lower end of the rolling dry granulator 23, and the process air is dehumidified by a dehumidifier and then is input into the process air pipe 24, wherein the dehumidifier can be separately arranged, or a dehumidifier configured by a fluidized bed system can be adopted; preferably, the feed inlet of the granulator 23 is provided with a binder inlet, which is beneficial to adjusting the granulation effect of the roll-in dry granulator 23.

In this embodiment, the particle crusher 25 is a hammer crusher or a blade crusher, and the outlet of the particle crusher 25 is optionally provided with a material valve 26, preferably, a third fan 33 is further connected in series between the particle crusher 25 and the material valve 26, and the outlet end of the material valve 26 is connected with the fluidized bed 2 through a pneumatic mechanism 30, and the inlet position can be a seed crystal inlet pipe 8 or a manual bottom material inlet arranged on the fluidized bed itself, or can be an independently arranged inlet of the fluidized bed 2.

The air blower mechanism 30 belongs to the prior art, and detailed structural steps are repeated, and specifically, the air blower 27, the heat exchanger 28, the accelerating tube 29 and other components can be selectively configured.

When the fluidized bed 2 is provided with the raw material liquid atomizing spray gun 13 as shown in fig. 2, a continuous spray fluidized bed granulator can be formed together with the fluidized bed 2, so that a continuous spray fluidized bed granulator process for directly obtaining solid particle finished products from liquid raw materials can be realized, two side spraying and top spraying are shown in fig. 2, and the position form of the raw material liquid atomizing spray gun 13 can be different from the background art, such as bottom spraying.

As shown in fig. 3, the atomizing spray gun 13 is provided with a camera 48, the atomizing spray gun 13 sprays the raw material liquid in an atomizing form to form a conical spray 42, the camera 48 comprises a cable and a miniature camera connected to the front end of the cable, the camera is used for observing the atomizing state of the spray gun in real time, and the linear distance between the camera and the center of a spray gun opening of the atomizing spray gun 13 is a, and a=20-350 mm. As shown in fig. 3 and 5, the relative angle between the spray gun and the camera can be in various forms, so long as the atomizing cone of the spray gun is within the view angle range of the camera, the purpose of the utility model can be achieved.

Further, in order to facilitate fixing, pulling out, cleaning, replacing and maintaining of the camera 48, the camera 48 is installed on the fluidized bed 2 in a pulling-out manner through the camera installation tube 44, the camera installation tube 44 is fixed on the shell wall of the fluidized bed 2, the tail end of the camera installation tube 44 extends out of the fluidized bed 2 or is flush with the outer wall of the fluidized bed 2, a camera protection tube 46 and a camera insulation tube 45 are further sleeved between the camera 48 and the camera installation tube 44, the camera insulation tube 45 is sleeved outside the camera protection tube 46, the camera protection tube 46 and the camera insulation tube 45 extend out of the camera installation tube 44, a gap is reserved between the camera protection tube and the camera protection tube 45 as a camera protection air channel 47, the camera protection air channel 47 is of a front end opening and rear end closed structure, and the camera protection air channel 47 blows protection air to one end of a camera close to a lens through the front end opening, and the outlet air speed of the camera protection air channel 47 can be between 1 m/s and 20 m/s.

Preferably, the space between the camera protection pipe 46 and the tail end of the camera heat preservation pipe 45 is closed by a sealing ring 49, and a protection wind inlet 53 is arranged on the camera heat preservation pipe 45.

As a further explanation of the present embodiment, the camera mounting tube 44 and the camera insulating tube 45 may be, but not limited to, a tight fit or an integral structure, and the protection wind inlet 53 may be provided with a double port or a tangential inlet, so that the above limitation is only an exemplary description of the present utility model and is not a limitation of the present utility model, and details such as whether the ends of the camera mounting tube 44, the camera insulating tube 45, and the camera protecting tube 46 are flush or not, and whether the protection wind inlet extends out of the fluidized bed 2 do not affect the achievement of the present utility model.

As a further explanation of this embodiment, the material of the camera protection tube 46 may be a stainless steel metal material, and the camera insulation tube 45 belongs to a mature product, and a person skilled in the art may reasonably select among insulation tubes in the market.

The outside of the atomizing spray gun 13 is provided with a spray gun protection pipe 40 arranged on the fluidized bed 2, a spray gun protection air duct 41 is arranged between the spray gun protection pipe 40 and the atomizing spray gun 13, the spray gun protection air duct 41 is provided with an air outlet with a forward opening, the air outlet of the spray gun protection air duct 41 is used for blowing protection air to one end of the spray gun close to a spray gun opening, the air speed of the outlet of the spray gun protection air duct is 1-30m/s, the spray gun head of the atomizing spray gun 13 is not easy to hang and block, the atomizing spray gun opening of the atomizing spray gun 13 plays a self-cleaning role, the spray gun opening of the atomizing spray gun 13 is flush with the outlet of the spray gun protection pipe 40 or protrudes forward beyond the outlet of the spray gun protection pipe 40, and the protruding amount of the spray gun opening is b, and b=0-150 mm.

When the device works, process air enters an air inlet chamber 5 of a fluidized bed from an air inlet 1, enters a fluidized chamber 7 after being distributed by an air distribution screen 6, carries out heat and mass exchange with a fluidized material layer, moisture enters the process air to be in a gas state, dust-containing gas discharged from a dust discharge port 17 is separated by a gas-solid separation device such as a bag dust remover 20, dust materials enter a rolling dry granulator 23 to be manufactured into lump materials or large particle materials, the lump materials or large particle materials enter a granulator 25 to be manufactured into small particle materials to contain powder materials, and the purposes of directly granulating the dust materials separated in the fluidized bed or manufacturing the small particle materials into small particle seeds are realized through a seed crystal inlet pipe 8 or a base material inlet and other inlet which are conveyed or directly fallen onto the fluidized bed body.

In summary, the utility model provides a fluidized bed device for drying, granulating and cooling wet materials, which is favorable for greatly reducing the dust amount in a system, improving the granule yield, improving the granule diameter of finished products and realizing large granule finished products, thereby being more favorable for the production of granule finished products, reducing the energy consumption of production lines, reducing the production cost, safe operation, environmental protection and clean production, ensuring stable continuous production, and being particularly suitable for materials with relatively large number of small particles in the wet materials, easy crushing and powder removal of solid particles in fluidization and low dry matter adhesion rate in spray granulation.

The operation of fig. 1 to 3 is only partially schematic and not in its full form, and is not described here.

The terminology in the above embodiments and arrangements of the utility model is prior art.

Second embodiment

The second embodiment differs from the first embodiment in that:

As shown in fig. 4, on the basis of the first embodiment, the air outlet of the bag-type dust collector 20 may be optionally provided with an air exhaust fan 4, and the air outlet of the air exhaust fan 4 is further provided with optional components: the tail gas heat utilization device 50 and the water dust remover 52 are connected with the air outlet of the exhaust fan 4 by the tail gas heat utilization device 50 and the water dust remover 52.

As shown in fig. 4, on the basis of the first embodiment, an inner heater 14 is optionally arranged in the fluidized bed 2, a cyclone separator 12 is optionally arranged between the dust discharge port of the fluidized bed 2 and the bag-type dust collector 20, the inlet end of the cyclone separator 12 is connected with the dust discharge port of the fluidized bed 2, the discharge port of the dust discharge port cyclone separator 12 is connected with the fluidized bed 2 through a second fan 15, and preferably, a second receiving barrel 34 is optionally arranged between the dust discharge port cyclone separator 12 and the second fan 15.

As shown in fig. 4, on the basis of the first embodiment, the air inlet of the fluidized bed 2 of the present embodiment may be provided with a first air inlet pipe 61 and a second air inlet pipe 62 according to the needs, the first air inlet pipe 61 and the second air inlet pipe 62 are respectively connected in series with the air inlet fan 31, and the first air inlet pipe 61 and the second air inlet pipe 62 are further provided with the dehumidifier 16 according to the needs.

Third embodiment

The third embodiment differs from the first and second embodiments in that: as shown in fig. 4, the fluidized bed system may be configured with two fluidized beds 2, as described in the background art, the two fluidized beds 2 may be used independently, or may be used in combination, and there are various combinations, including an open type and a closed type, in which the air outlet of the bag-type dust collector 20 corresponding to the right fluidized bed 2 is connected to the air inlet of the left fluidized bed 2 to form a semi-closed type, and when used in combination, the two fluidized beds 2 may be communicated through a semi-finished air conveying mechanism, or a bucket elevator may be used to replace the semi-finished air conveying mechanism.

The air outlet of the right side fluidized bed 2 corresponding to the bag-type dust collector 20 is connected with an air inlet pipe 60 of the air inlet of the left side fluidized bed 2 through an air exhaust fan 4, and the air inlet pipe 60 is connected with an air blower 32 in series.

The semi-finished product air conveying mechanism comprises a semi-finished product fan 63 for conveying output materials of the left side fluidized bed 2 to the right side fluidized bed 2, and the semi-finished product fan 63 is respectively connected with a discharge hole of the left side fluidized bed 2 and the right side fluidized bed 2 through a semi-finished product air conveying pipe 64.

Further, the semi-finished product air conveying mechanism can be also provided with a semi-finished product cyclone separator 65, and the selected semi-finished product cyclone separator 65 is connected between the semi-finished product air conveying pipe 64 and the right fluidized bed 2.

Further, the semi-finished product pneumatic conveying mechanism can be also provided with a sieving machine 66, and the sieving machine 66 is arranged between the cyclone separator 65 and the right side fluidized bed 2.

Further, the semi-finished product air conveying mechanism can be further provided with a first air closing machine 9, and the first air closing machine 9 is connected between the semi-finished product cyclone separator 65 and the sieving machine 66.

The semi-finished air pipe air outlet pipe 19 can be connected to the cloth bag dust removal 20 corresponding to the left fluidized bed 2 or the cloth bag dust removal 20 corresponding to the right fluidized bed 2, or can be independently provided with a cloth bag dust removal.

Fourth embodiment

The fourth embodiment differs from the above-described embodiments in that: when the net plate is installed in the granulator 25 in order to realize better yield, reduce the repeated processing or dissolving amount and greatly reduce the dust amount in the system, the mesh size of the net plate is 1-30 times of the particle size of the finished product of the fluidized bed, the rotating speed of the granulator is 400-4000 revolutions per minute, and the crushed material particles can be partially or mostly directly used as the particle size range of the finished product.

Fifth embodiment

The fifth embodiment differs from the above-described embodiments in that: the net plate is arranged in the granulator 25, the mesh size of the net plate is smaller than or equal to the finished product grain size of the fluidized bed granulator, the idealization of the crystal seed size can be realized, the mesh size of the net plate of the granulator is smaller than or equal to the finished product grain size of the fluidized bed granulator, the crystal seed grain size can be completely smaller than the finished product grain size, the finished product is ensured to pass through the wrapping coating during continuous spray granulation, the attractive appearance, better bulk density and fluidity are realized, and a large number of irregular finished product grain shapes are avoided.

The production line has flexible composition, and can be freely combined according to the requirements of an actual production line, and the purposes can be achieved by adopting the prior art scheme, namely, the embodiment is not in all embodiment expression forms, and can be combined with the prior disclosed technical characteristics for application, and the utility model belongs to the protection scope.

In summary, the utility model provides a fluidized bed device for drying, granulating and cooling wet materials, which is favorable for greatly reducing the dust amount in a system, improving the granule yield, improving the granule diameter of finished products and realizing large granule finished products, thereby being more favorable for the production of granule finished products, reducing the energy consumption of production lines, reducing the production cost, safe operation, environmental protection and clean production, ensuring stable continuous production, and being particularly suitable for materials with relatively large amount of small particles in the wet materials, easy crushing and powder removal of solid particles in fluidization and low adhesion rate in spray fluidized bed granulation.

The operation of fig. 1 to 5 is only partially schematic and not in its entirety, and is not described in any way.

The terminology in the above embodiments and arrangements of the utility model is prior art.

Claims (10)

1. The utility model provides a continuous type fluidized bed, includes the fluidized bed, and the dust exhaust mouth of fluidized bed is connected with sack cleaner, its characterized in that: the discharge port of the bag-type dust collector is connected with a granulator, the discharge port of the granulator is connected with a granulator, and the discharge port of the granulator is connected to a fluidized bed.

2. A continuous fluidized bed according to claim 1, characterized in that: the granulator is a rolling dry granulator.

3. A continuous fluidized bed according to claim 1 or 2, characterized in that: the granulator is connected with a process air pipe, and an inlet of the process air pipe is connected with a dehumidifier.

4. A continuous fluidized bed according to claim 1 or 2, characterized in that: the granulator is a hammer type or blade type crusher.

5. A continuous fluidized bed according to claim 1, characterized in that: the discharge port of the granulator is connected with the fluidized bed through an air conveying mechanism.

6. A continuous fluidized bed according to claim 2, characterized in that: the inlet of the rolling dry-method granulator is provided with a spiral pressing device and a collecting barrel, the collecting barrel is connected to the discharge end of the bag-type dust remover, and the collecting barrel is connected with the rolling dry-method granulator through the spiral pressing device.

7. A continuous fluidized bed according to claim 1, characterized in that: the fluidized bed is provided with a raw material liquid atomizing spray gun so as to form a continuous spray fluidized bed granulator together with the fluidized bed.

8. A continuous fluidized bed according to claim 7, characterized in that: the atomizing spray gun is provided with a camera installed in the fluidized bed, and the camera is used for observing the atomizing state of the spray gun in real time and has a linear distance of 20-350mm from the center of a spray gun opening of the atomizing spray gun.

9. A continuous fluidized bed according to claim 8, characterized in that: the camera overcoat is equipped with the protection pipe, and the protection pipe overcoat is equipped with clearance fit's insulating tube, and the clearance between insulating tube and the protection pipe is as camera protection wind channel, and camera protection wind channel is used for blowing the protection wind to the camera one end that is close to the camera.

10. A continuous fluidized bed according to claim 7, characterized in that: the spray gun is provided with a spray gun protection pipe arranged on the fluidized bed, a spray gun protection air channel is arranged between the spray gun protection pipe and the spray gun, the spray gun protection air channel is used for blowing protection air to one end of the spray gun close to a spray gun opening, the spray gun opening of the spray gun is flush with the outlet of the spray gun protection pipe or protrudes forward to the outlet of the spray gun protection pipe, and the protruding amount of the spray gun opening is between 0 and 150 mm.